Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2008 Rodolfo Giometti <giometti@linux.it> |
| 3 | * Copyright (c) 2008 Eurotech S.p.A. <info@eurtech.it> |
| 4 | * |
| 5 | * This code is *strongly* based on EHCI-HCD code by David Brownell since |
| 6 | * the chip is a quasi-EHCI compatible. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 16 | * for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software Foundation, |
| 20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/pci.h> |
| 25 | #include <linux/dmapool.h> |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/ioport.h> |
| 29 | #include <linux/sched.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/errno.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/timer.h> |
| 34 | #include <linux/list.h> |
| 35 | #include <linux/interrupt.h> |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 36 | #include <linux/usb.h> |
Eric Lescouet | 27729aa | 2010-04-24 23:21:52 +0200 | [diff] [blame] | 37 | #include <linux/usb/hcd.h> |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 38 | #include <linux/moduleparam.h> |
| 39 | #include <linux/dma-mapping.h> |
| 40 | #include <linux/io.h> |
| 41 | |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 42 | #include <asm/irq.h> |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 43 | #include <asm/unaligned.h> |
| 44 | |
| 45 | #include <linux/irq.h> |
| 46 | #include <linux/platform_device.h> |
| 47 | |
| 48 | #include "oxu210hp.h" |
| 49 | |
| 50 | #define DRIVER_VERSION "0.0.50" |
| 51 | |
| 52 | /* |
| 53 | * Main defines |
| 54 | */ |
| 55 | |
| 56 | #define oxu_dbg(oxu, fmt, args...) \ |
| 57 | dev_dbg(oxu_to_hcd(oxu)->self.controller , fmt , ## args) |
| 58 | #define oxu_err(oxu, fmt, args...) \ |
| 59 | dev_err(oxu_to_hcd(oxu)->self.controller , fmt , ## args) |
| 60 | #define oxu_info(oxu, fmt, args...) \ |
| 61 | dev_info(oxu_to_hcd(oxu)->self.controller , fmt , ## args) |
| 62 | |
| 63 | static inline struct usb_hcd *oxu_to_hcd(struct oxu_hcd *oxu) |
| 64 | { |
| 65 | return container_of((void *) oxu, struct usb_hcd, hcd_priv); |
| 66 | } |
| 67 | |
| 68 | static inline struct oxu_hcd *hcd_to_oxu(struct usb_hcd *hcd) |
| 69 | { |
| 70 | return (struct oxu_hcd *) (hcd->hcd_priv); |
| 71 | } |
| 72 | |
| 73 | /* |
| 74 | * Debug stuff |
| 75 | */ |
| 76 | |
| 77 | #undef OXU_URB_TRACE |
| 78 | #undef OXU_VERBOSE_DEBUG |
| 79 | |
| 80 | #ifdef OXU_VERBOSE_DEBUG |
| 81 | #define oxu_vdbg oxu_dbg |
| 82 | #else |
| 83 | #define oxu_vdbg(oxu, fmt, args...) /* Nop */ |
| 84 | #endif |
| 85 | |
| 86 | #ifdef DEBUG |
| 87 | |
| 88 | static int __attribute__((__unused__)) |
| 89 | dbg_status_buf(char *buf, unsigned len, const char *label, u32 status) |
| 90 | { |
| 91 | return scnprintf(buf, len, "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s", |
| 92 | label, label[0] ? " " : "", status, |
| 93 | (status & STS_ASS) ? " Async" : "", |
| 94 | (status & STS_PSS) ? " Periodic" : "", |
| 95 | (status & STS_RECL) ? " Recl" : "", |
| 96 | (status & STS_HALT) ? " Halt" : "", |
| 97 | (status & STS_IAA) ? " IAA" : "", |
| 98 | (status & STS_FATAL) ? " FATAL" : "", |
| 99 | (status & STS_FLR) ? " FLR" : "", |
| 100 | (status & STS_PCD) ? " PCD" : "", |
| 101 | (status & STS_ERR) ? " ERR" : "", |
| 102 | (status & STS_INT) ? " INT" : "" |
| 103 | ); |
| 104 | } |
| 105 | |
| 106 | static int __attribute__((__unused__)) |
| 107 | dbg_intr_buf(char *buf, unsigned len, const char *label, u32 enable) |
| 108 | { |
| 109 | return scnprintf(buf, len, "%s%sintrenable %02x%s%s%s%s%s%s", |
| 110 | label, label[0] ? " " : "", enable, |
| 111 | (enable & STS_IAA) ? " IAA" : "", |
| 112 | (enable & STS_FATAL) ? " FATAL" : "", |
| 113 | (enable & STS_FLR) ? " FLR" : "", |
| 114 | (enable & STS_PCD) ? " PCD" : "", |
| 115 | (enable & STS_ERR) ? " ERR" : "", |
| 116 | (enable & STS_INT) ? " INT" : "" |
| 117 | ); |
| 118 | } |
| 119 | |
| 120 | static const char *const fls_strings[] = |
| 121 | { "1024", "512", "256", "??" }; |
| 122 | |
| 123 | static int dbg_command_buf(char *buf, unsigned len, |
| 124 | const char *label, u32 command) |
| 125 | { |
| 126 | return scnprintf(buf, len, |
| 127 | "%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s", |
| 128 | label, label[0] ? " " : "", command, |
| 129 | (command & CMD_PARK) ? "park" : "(park)", |
| 130 | CMD_PARK_CNT(command), |
| 131 | (command >> 16) & 0x3f, |
| 132 | (command & CMD_LRESET) ? " LReset" : "", |
| 133 | (command & CMD_IAAD) ? " IAAD" : "", |
| 134 | (command & CMD_ASE) ? " Async" : "", |
| 135 | (command & CMD_PSE) ? " Periodic" : "", |
| 136 | fls_strings[(command >> 2) & 0x3], |
| 137 | (command & CMD_RESET) ? " Reset" : "", |
| 138 | (command & CMD_RUN) ? "RUN" : "HALT" |
| 139 | ); |
| 140 | } |
| 141 | |
| 142 | static int dbg_port_buf(char *buf, unsigned len, const char *label, |
| 143 | int port, u32 status) |
| 144 | { |
| 145 | char *sig; |
| 146 | |
| 147 | /* signaling state */ |
| 148 | switch (status & (3 << 10)) { |
| 149 | case 0 << 10: |
| 150 | sig = "se0"; |
| 151 | break; |
| 152 | case 1 << 10: |
| 153 | sig = "k"; /* low speed */ |
| 154 | break; |
| 155 | case 2 << 10: |
| 156 | sig = "j"; |
| 157 | break; |
| 158 | default: |
| 159 | sig = "?"; |
| 160 | break; |
| 161 | } |
| 162 | |
| 163 | return scnprintf(buf, len, |
| 164 | "%s%sport %d status %06x%s%s sig=%s%s%s%s%s%s%s%s%s%s", |
| 165 | label, label[0] ? " " : "", port, status, |
| 166 | (status & PORT_POWER) ? " POWER" : "", |
| 167 | (status & PORT_OWNER) ? " OWNER" : "", |
| 168 | sig, |
| 169 | (status & PORT_RESET) ? " RESET" : "", |
| 170 | (status & PORT_SUSPEND) ? " SUSPEND" : "", |
| 171 | (status & PORT_RESUME) ? " RESUME" : "", |
| 172 | (status & PORT_OCC) ? " OCC" : "", |
| 173 | (status & PORT_OC) ? " OC" : "", |
| 174 | (status & PORT_PEC) ? " PEC" : "", |
| 175 | (status & PORT_PE) ? " PE" : "", |
| 176 | (status & PORT_CSC) ? " CSC" : "", |
| 177 | (status & PORT_CONNECT) ? " CONNECT" : "" |
| 178 | ); |
| 179 | } |
| 180 | |
| 181 | #else |
| 182 | |
| 183 | static inline int __attribute__((__unused__)) |
| 184 | dbg_status_buf(char *buf, unsigned len, const char *label, u32 status) |
| 185 | { return 0; } |
| 186 | |
| 187 | static inline int __attribute__((__unused__)) |
| 188 | dbg_command_buf(char *buf, unsigned len, const char *label, u32 command) |
| 189 | { return 0; } |
| 190 | |
| 191 | static inline int __attribute__((__unused__)) |
| 192 | dbg_intr_buf(char *buf, unsigned len, const char *label, u32 enable) |
| 193 | { return 0; } |
| 194 | |
| 195 | static inline int __attribute__((__unused__)) |
| 196 | dbg_port_buf(char *buf, unsigned len, const char *label, int port, u32 status) |
| 197 | { return 0; } |
| 198 | |
| 199 | #endif /* DEBUG */ |
| 200 | |
| 201 | /* functions have the "wrong" filename when they're output... */ |
| 202 | #define dbg_status(oxu, label, status) { \ |
| 203 | char _buf[80]; \ |
| 204 | dbg_status_buf(_buf, sizeof _buf, label, status); \ |
| 205 | oxu_dbg(oxu, "%s\n", _buf); \ |
| 206 | } |
| 207 | |
| 208 | #define dbg_cmd(oxu, label, command) { \ |
| 209 | char _buf[80]; \ |
| 210 | dbg_command_buf(_buf, sizeof _buf, label, command); \ |
| 211 | oxu_dbg(oxu, "%s\n", _buf); \ |
| 212 | } |
| 213 | |
| 214 | #define dbg_port(oxu, label, port, status) { \ |
| 215 | char _buf[80]; \ |
| 216 | dbg_port_buf(_buf, sizeof _buf, label, port, status); \ |
| 217 | oxu_dbg(oxu, "%s\n", _buf); \ |
| 218 | } |
| 219 | |
| 220 | /* |
| 221 | * Module parameters |
| 222 | */ |
| 223 | |
| 224 | /* Initial IRQ latency: faster than hw default */ |
| 225 | static int log2_irq_thresh; /* 0 to 6 */ |
| 226 | module_param(log2_irq_thresh, int, S_IRUGO); |
| 227 | MODULE_PARM_DESC(log2_irq_thresh, "log2 IRQ latency, 1-64 microframes"); |
| 228 | |
| 229 | /* Initial park setting: slower than hw default */ |
| 230 | static unsigned park; |
| 231 | module_param(park, uint, S_IRUGO); |
| 232 | MODULE_PARM_DESC(park, "park setting; 1-3 back-to-back async packets"); |
| 233 | |
| 234 | /* For flakey hardware, ignore overcurrent indicators */ |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 235 | static bool ignore_oc; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 236 | module_param(ignore_oc, bool, S_IRUGO); |
| 237 | MODULE_PARM_DESC(ignore_oc, "ignore bogus hardware overcurrent indications"); |
| 238 | |
| 239 | |
| 240 | static void ehci_work(struct oxu_hcd *oxu); |
| 241 | static int oxu_hub_control(struct usb_hcd *hcd, |
| 242 | u16 typeReq, u16 wValue, u16 wIndex, |
| 243 | char *buf, u16 wLength); |
| 244 | |
| 245 | /* |
| 246 | * Local functions |
| 247 | */ |
| 248 | |
| 249 | /* Low level read/write registers functions */ |
| 250 | static inline u32 oxu_readl(void *base, u32 reg) |
| 251 | { |
| 252 | return readl(base + reg); |
| 253 | } |
| 254 | |
| 255 | static inline void oxu_writel(void *base, u32 reg, u32 val) |
| 256 | { |
| 257 | writel(val, base + reg); |
| 258 | } |
| 259 | |
| 260 | static inline void timer_action_done(struct oxu_hcd *oxu, |
| 261 | enum ehci_timer_action action) |
| 262 | { |
| 263 | clear_bit(action, &oxu->actions); |
| 264 | } |
| 265 | |
| 266 | static inline void timer_action(struct oxu_hcd *oxu, |
| 267 | enum ehci_timer_action action) |
| 268 | { |
| 269 | if (!test_and_set_bit(action, &oxu->actions)) { |
| 270 | unsigned long t; |
| 271 | |
| 272 | switch (action) { |
| 273 | case TIMER_IAA_WATCHDOG: |
| 274 | t = EHCI_IAA_JIFFIES; |
| 275 | break; |
| 276 | case TIMER_IO_WATCHDOG: |
| 277 | t = EHCI_IO_JIFFIES; |
| 278 | break; |
| 279 | case TIMER_ASYNC_OFF: |
| 280 | t = EHCI_ASYNC_JIFFIES; |
| 281 | break; |
| 282 | case TIMER_ASYNC_SHRINK: |
| 283 | default: |
| 284 | t = EHCI_SHRINK_JIFFIES; |
| 285 | break; |
| 286 | } |
| 287 | t += jiffies; |
| 288 | /* all timings except IAA watchdog can be overridden. |
| 289 | * async queue SHRINK often precedes IAA. while it's ready |
| 290 | * to go OFF neither can matter, and afterwards the IO |
| 291 | * watchdog stops unless there's still periodic traffic. |
| 292 | */ |
| 293 | if (action != TIMER_IAA_WATCHDOG |
| 294 | && t > oxu->watchdog.expires |
| 295 | && timer_pending(&oxu->watchdog)) |
| 296 | return; |
| 297 | mod_timer(&oxu->watchdog, t); |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | /* |
| 302 | * handshake - spin reading hc until handshake completes or fails |
| 303 | * @ptr: address of hc register to be read |
| 304 | * @mask: bits to look at in result of read |
| 305 | * @done: value of those bits when handshake succeeds |
| 306 | * @usec: timeout in microseconds |
| 307 | * |
| 308 | * Returns negative errno, or zero on success |
| 309 | * |
| 310 | * Success happens when the "mask" bits have the specified value (hardware |
| 311 | * handshake done). There are two failure modes: "usec" have passed (major |
| 312 | * hardware flakeout), or the register reads as all-ones (hardware removed). |
| 313 | * |
| 314 | * That last failure should_only happen in cases like physical cardbus eject |
| 315 | * before driver shutdown. But it also seems to be caused by bugs in cardbus |
| 316 | * bridge shutdown: shutting down the bridge before the devices using it. |
| 317 | */ |
| 318 | static int handshake(struct oxu_hcd *oxu, void __iomem *ptr, |
| 319 | u32 mask, u32 done, int usec) |
| 320 | { |
| 321 | u32 result; |
| 322 | |
| 323 | do { |
| 324 | result = readl(ptr); |
| 325 | if (result == ~(u32)0) /* card removed */ |
| 326 | return -ENODEV; |
| 327 | result &= mask; |
| 328 | if (result == done) |
| 329 | return 0; |
| 330 | udelay(1); |
| 331 | usec--; |
| 332 | } while (usec > 0); |
| 333 | return -ETIMEDOUT; |
| 334 | } |
| 335 | |
| 336 | /* Force HC to halt state from unknown (EHCI spec section 2.3) */ |
| 337 | static int ehci_halt(struct oxu_hcd *oxu) |
| 338 | { |
| 339 | u32 temp = readl(&oxu->regs->status); |
| 340 | |
| 341 | /* disable any irqs left enabled by previous code */ |
| 342 | writel(0, &oxu->regs->intr_enable); |
| 343 | |
| 344 | if ((temp & STS_HALT) != 0) |
| 345 | return 0; |
| 346 | |
| 347 | temp = readl(&oxu->regs->command); |
| 348 | temp &= ~CMD_RUN; |
| 349 | writel(temp, &oxu->regs->command); |
| 350 | return handshake(oxu, &oxu->regs->status, |
| 351 | STS_HALT, STS_HALT, 16 * 125); |
| 352 | } |
| 353 | |
| 354 | /* Put TDI/ARC silicon into EHCI mode */ |
| 355 | static void tdi_reset(struct oxu_hcd *oxu) |
| 356 | { |
| 357 | u32 __iomem *reg_ptr; |
| 358 | u32 tmp; |
| 359 | |
| 360 | reg_ptr = (u32 __iomem *)(((u8 __iomem *)oxu->regs) + 0x68); |
| 361 | tmp = readl(reg_ptr); |
| 362 | tmp |= 0x3; |
| 363 | writel(tmp, reg_ptr); |
| 364 | } |
| 365 | |
| 366 | /* Reset a non-running (STS_HALT == 1) controller */ |
| 367 | static int ehci_reset(struct oxu_hcd *oxu) |
| 368 | { |
| 369 | int retval; |
| 370 | u32 command = readl(&oxu->regs->command); |
| 371 | |
| 372 | command |= CMD_RESET; |
| 373 | dbg_cmd(oxu, "reset", command); |
| 374 | writel(command, &oxu->regs->command); |
| 375 | oxu_to_hcd(oxu)->state = HC_STATE_HALT; |
| 376 | oxu->next_statechange = jiffies; |
| 377 | retval = handshake(oxu, &oxu->regs->command, |
| 378 | CMD_RESET, 0, 250 * 1000); |
| 379 | |
| 380 | if (retval) |
| 381 | return retval; |
| 382 | |
| 383 | tdi_reset(oxu); |
| 384 | |
| 385 | return retval; |
| 386 | } |
| 387 | |
| 388 | /* Idle the controller (from running) */ |
| 389 | static void ehci_quiesce(struct oxu_hcd *oxu) |
| 390 | { |
| 391 | u32 temp; |
| 392 | |
| 393 | #ifdef DEBUG |
| 394 | if (!HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) |
| 395 | BUG(); |
| 396 | #endif |
| 397 | |
| 398 | /* wait for any schedule enables/disables to take effect */ |
| 399 | temp = readl(&oxu->regs->command) << 10; |
| 400 | temp &= STS_ASS | STS_PSS; |
| 401 | if (handshake(oxu, &oxu->regs->status, STS_ASS | STS_PSS, |
| 402 | temp, 16 * 125) != 0) { |
| 403 | oxu_to_hcd(oxu)->state = HC_STATE_HALT; |
| 404 | return; |
| 405 | } |
| 406 | |
| 407 | /* then disable anything that's still active */ |
| 408 | temp = readl(&oxu->regs->command); |
| 409 | temp &= ~(CMD_ASE | CMD_IAAD | CMD_PSE); |
| 410 | writel(temp, &oxu->regs->command); |
| 411 | |
| 412 | /* hardware can take 16 microframes to turn off ... */ |
| 413 | if (handshake(oxu, &oxu->regs->status, STS_ASS | STS_PSS, |
| 414 | 0, 16 * 125) != 0) { |
| 415 | oxu_to_hcd(oxu)->state = HC_STATE_HALT; |
| 416 | return; |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | static int check_reset_complete(struct oxu_hcd *oxu, int index, |
| 421 | u32 __iomem *status_reg, int port_status) |
| 422 | { |
| 423 | if (!(port_status & PORT_CONNECT)) { |
| 424 | oxu->reset_done[index] = 0; |
| 425 | return port_status; |
| 426 | } |
| 427 | |
| 428 | /* if reset finished and it's still not enabled -- handoff */ |
| 429 | if (!(port_status & PORT_PE)) { |
| 430 | oxu_dbg(oxu, "Failed to enable port %d on root hub TT\n", |
| 431 | index+1); |
| 432 | return port_status; |
| 433 | } else |
| 434 | oxu_dbg(oxu, "port %d high speed\n", index + 1); |
| 435 | |
| 436 | return port_status; |
| 437 | } |
| 438 | |
| 439 | static void ehci_hub_descriptor(struct oxu_hcd *oxu, |
| 440 | struct usb_hub_descriptor *desc) |
| 441 | { |
| 442 | int ports = HCS_N_PORTS(oxu->hcs_params); |
| 443 | u16 temp; |
| 444 | |
| 445 | desc->bDescriptorType = 0x29; |
| 446 | desc->bPwrOn2PwrGood = 10; /* oxu 1.0, 2.3.9 says 20ms max */ |
| 447 | desc->bHubContrCurrent = 0; |
| 448 | |
| 449 | desc->bNbrPorts = ports; |
| 450 | temp = 1 + (ports / 8); |
| 451 | desc->bDescLength = 7 + 2 * temp; |
| 452 | |
Sarah Sharp | da13051 | 2010-11-30 15:55:51 -0800 | [diff] [blame] | 453 | /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ |
John Youn | dbe79bb | 2001-09-17 00:00:00 -0700 | [diff] [blame] | 454 | memset(&desc->u.hs.DeviceRemovable[0], 0, temp); |
| 455 | memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 456 | |
| 457 | temp = 0x0008; /* per-port overcurrent reporting */ |
| 458 | if (HCS_PPC(oxu->hcs_params)) |
| 459 | temp |= 0x0001; /* per-port power control */ |
| 460 | else |
| 461 | temp |= 0x0002; /* no power switching */ |
| 462 | desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp); |
| 463 | } |
| 464 | |
| 465 | |
| 466 | /* Allocate an OXU210HP on-chip memory data buffer |
| 467 | * |
| 468 | * An on-chip memory data buffer is required for each OXU210HP USB transfer. |
| 469 | * Each transfer descriptor has one or more on-chip memory data buffers. |
| 470 | * |
| 471 | * Data buffers are allocated from a fix sized pool of data blocks. |
| 472 | * To minimise fragmentation and give reasonable memory utlisation, |
| 473 | * data buffers are allocated with sizes the power of 2 multiples of |
| 474 | * the block size, starting on an address a multiple of the allocated size. |
| 475 | * |
| 476 | * FIXME: callers of this function require a buffer to be allocated for |
| 477 | * len=0. This is a waste of on-chip memory and should be fix. Then this |
| 478 | * function should be changed to not allocate a buffer for len=0. |
| 479 | */ |
| 480 | static int oxu_buf_alloc(struct oxu_hcd *oxu, struct ehci_qtd *qtd, int len) |
| 481 | { |
| 482 | int n_blocks; /* minium blocks needed to hold len */ |
| 483 | int a_blocks; /* blocks allocated */ |
| 484 | int i, j; |
| 485 | |
| 486 | /* Don't allocte bigger than supported */ |
| 487 | if (len > BUFFER_SIZE * BUFFER_NUM) { |
| 488 | oxu_err(oxu, "buffer too big (%d)\n", len); |
| 489 | return -ENOMEM; |
| 490 | } |
| 491 | |
| 492 | spin_lock(&oxu->mem_lock); |
| 493 | |
| 494 | /* Number of blocks needed to hold len */ |
| 495 | n_blocks = (len + BUFFER_SIZE - 1) / BUFFER_SIZE; |
| 496 | |
| 497 | /* Round the number of blocks up to the power of 2 */ |
| 498 | for (a_blocks = 1; a_blocks < n_blocks; a_blocks <<= 1) |
| 499 | ; |
| 500 | |
| 501 | /* Find a suitable available data buffer */ |
| 502 | for (i = 0; i < BUFFER_NUM; |
| 503 | i += max(a_blocks, (int)oxu->db_used[i])) { |
| 504 | |
| 505 | /* Check all the required blocks are available */ |
| 506 | for (j = 0; j < a_blocks; j++) |
| 507 | if (oxu->db_used[i + j]) |
| 508 | break; |
| 509 | |
| 510 | if (j != a_blocks) |
| 511 | continue; |
| 512 | |
| 513 | /* Allocate blocks found! */ |
| 514 | qtd->buffer = (void *) &oxu->mem->db_pool[i]; |
| 515 | qtd->buffer_dma = virt_to_phys(qtd->buffer); |
| 516 | |
| 517 | qtd->qtd_buffer_len = BUFFER_SIZE * a_blocks; |
| 518 | oxu->db_used[i] = a_blocks; |
| 519 | |
| 520 | spin_unlock(&oxu->mem_lock); |
| 521 | |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | /* Failed */ |
| 526 | |
| 527 | spin_unlock(&oxu->mem_lock); |
| 528 | |
| 529 | return -ENOMEM; |
| 530 | } |
| 531 | |
| 532 | static void oxu_buf_free(struct oxu_hcd *oxu, struct ehci_qtd *qtd) |
| 533 | { |
| 534 | int index; |
| 535 | |
| 536 | spin_lock(&oxu->mem_lock); |
| 537 | |
| 538 | index = (qtd->buffer - (void *) &oxu->mem->db_pool[0]) |
| 539 | / BUFFER_SIZE; |
| 540 | oxu->db_used[index] = 0; |
| 541 | qtd->qtd_buffer_len = 0; |
| 542 | qtd->buffer_dma = 0; |
| 543 | qtd->buffer = NULL; |
| 544 | |
| 545 | spin_unlock(&oxu->mem_lock); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | static inline void ehci_qtd_init(struct ehci_qtd *qtd, dma_addr_t dma) |
| 549 | { |
| 550 | memset(qtd, 0, sizeof *qtd); |
| 551 | qtd->qtd_dma = dma; |
| 552 | qtd->hw_token = cpu_to_le32(QTD_STS_HALT); |
| 553 | qtd->hw_next = EHCI_LIST_END; |
| 554 | qtd->hw_alt_next = EHCI_LIST_END; |
| 555 | INIT_LIST_HEAD(&qtd->qtd_list); |
| 556 | } |
| 557 | |
| 558 | static inline void oxu_qtd_free(struct oxu_hcd *oxu, struct ehci_qtd *qtd) |
| 559 | { |
| 560 | int index; |
| 561 | |
| 562 | if (qtd->buffer) |
| 563 | oxu_buf_free(oxu, qtd); |
| 564 | |
| 565 | spin_lock(&oxu->mem_lock); |
| 566 | |
| 567 | index = qtd - &oxu->mem->qtd_pool[0]; |
| 568 | oxu->qtd_used[index] = 0; |
| 569 | |
| 570 | spin_unlock(&oxu->mem_lock); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | static struct ehci_qtd *ehci_qtd_alloc(struct oxu_hcd *oxu) |
| 574 | { |
| 575 | int i; |
| 576 | struct ehci_qtd *qtd = NULL; |
| 577 | |
| 578 | spin_lock(&oxu->mem_lock); |
| 579 | |
| 580 | for (i = 0; i < QTD_NUM; i++) |
| 581 | if (!oxu->qtd_used[i]) |
| 582 | break; |
| 583 | |
| 584 | if (i < QTD_NUM) { |
| 585 | qtd = (struct ehci_qtd *) &oxu->mem->qtd_pool[i]; |
| 586 | memset(qtd, 0, sizeof *qtd); |
| 587 | |
| 588 | qtd->hw_token = cpu_to_le32(QTD_STS_HALT); |
| 589 | qtd->hw_next = EHCI_LIST_END; |
| 590 | qtd->hw_alt_next = EHCI_LIST_END; |
| 591 | INIT_LIST_HEAD(&qtd->qtd_list); |
| 592 | |
| 593 | qtd->qtd_dma = virt_to_phys(qtd); |
| 594 | |
| 595 | oxu->qtd_used[i] = 1; |
| 596 | } |
| 597 | |
| 598 | spin_unlock(&oxu->mem_lock); |
| 599 | |
| 600 | return qtd; |
| 601 | } |
| 602 | |
| 603 | static void oxu_qh_free(struct oxu_hcd *oxu, struct ehci_qh *qh) |
| 604 | { |
| 605 | int index; |
| 606 | |
| 607 | spin_lock(&oxu->mem_lock); |
| 608 | |
| 609 | index = qh - &oxu->mem->qh_pool[0]; |
| 610 | oxu->qh_used[index] = 0; |
| 611 | |
| 612 | spin_unlock(&oxu->mem_lock); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 613 | } |
| 614 | |
| 615 | static void qh_destroy(struct kref *kref) |
| 616 | { |
| 617 | struct ehci_qh *qh = container_of(kref, struct ehci_qh, kref); |
| 618 | struct oxu_hcd *oxu = qh->oxu; |
| 619 | |
| 620 | /* clean qtds first, and know this is not linked */ |
| 621 | if (!list_empty(&qh->qtd_list) || qh->qh_next.ptr) { |
| 622 | oxu_dbg(oxu, "unused qh not empty!\n"); |
| 623 | BUG(); |
| 624 | } |
| 625 | if (qh->dummy) |
| 626 | oxu_qtd_free(oxu, qh->dummy); |
| 627 | oxu_qh_free(oxu, qh); |
| 628 | } |
| 629 | |
| 630 | static struct ehci_qh *oxu_qh_alloc(struct oxu_hcd *oxu) |
| 631 | { |
| 632 | int i; |
| 633 | struct ehci_qh *qh = NULL; |
| 634 | |
| 635 | spin_lock(&oxu->mem_lock); |
| 636 | |
| 637 | for (i = 0; i < QHEAD_NUM; i++) |
| 638 | if (!oxu->qh_used[i]) |
| 639 | break; |
| 640 | |
| 641 | if (i < QHEAD_NUM) { |
| 642 | qh = (struct ehci_qh *) &oxu->mem->qh_pool[i]; |
| 643 | memset(qh, 0, sizeof *qh); |
| 644 | |
| 645 | kref_init(&qh->kref); |
| 646 | qh->oxu = oxu; |
| 647 | qh->qh_dma = virt_to_phys(qh); |
| 648 | INIT_LIST_HEAD(&qh->qtd_list); |
| 649 | |
| 650 | /* dummy td enables safe urb queuing */ |
| 651 | qh->dummy = ehci_qtd_alloc(oxu); |
| 652 | if (qh->dummy == NULL) { |
| 653 | oxu_dbg(oxu, "no dummy td\n"); |
| 654 | oxu->qh_used[i] = 0; |
Dan Carpenter | 82a5eeb | 2010-03-29 12:01:27 +0300 | [diff] [blame] | 655 | qh = NULL; |
| 656 | goto unlock; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 657 | } |
| 658 | |
| 659 | oxu->qh_used[i] = 1; |
| 660 | } |
Dan Carpenter | 82a5eeb | 2010-03-29 12:01:27 +0300 | [diff] [blame] | 661 | unlock: |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 662 | spin_unlock(&oxu->mem_lock); |
| 663 | |
| 664 | return qh; |
| 665 | } |
| 666 | |
| 667 | /* to share a qh (cpu threads, or hc) */ |
| 668 | static inline struct ehci_qh *qh_get(struct ehci_qh *qh) |
| 669 | { |
| 670 | kref_get(&qh->kref); |
| 671 | return qh; |
| 672 | } |
| 673 | |
| 674 | static inline void qh_put(struct ehci_qh *qh) |
| 675 | { |
| 676 | kref_put(&qh->kref, qh_destroy); |
| 677 | } |
| 678 | |
| 679 | static void oxu_murb_free(struct oxu_hcd *oxu, struct oxu_murb *murb) |
| 680 | { |
| 681 | int index; |
| 682 | |
| 683 | spin_lock(&oxu->mem_lock); |
| 684 | |
| 685 | index = murb - &oxu->murb_pool[0]; |
| 686 | oxu->murb_used[index] = 0; |
| 687 | |
| 688 | spin_unlock(&oxu->mem_lock); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 689 | } |
| 690 | |
| 691 | static struct oxu_murb *oxu_murb_alloc(struct oxu_hcd *oxu) |
| 692 | |
| 693 | { |
| 694 | int i; |
| 695 | struct oxu_murb *murb = NULL; |
| 696 | |
| 697 | spin_lock(&oxu->mem_lock); |
| 698 | |
| 699 | for (i = 0; i < MURB_NUM; i++) |
| 700 | if (!oxu->murb_used[i]) |
| 701 | break; |
| 702 | |
| 703 | if (i < MURB_NUM) { |
| 704 | murb = &(oxu->murb_pool)[i]; |
| 705 | |
| 706 | oxu->murb_used[i] = 1; |
| 707 | } |
| 708 | |
| 709 | spin_unlock(&oxu->mem_lock); |
| 710 | |
| 711 | return murb; |
| 712 | } |
| 713 | |
| 714 | /* The queue heads and transfer descriptors are managed from pools tied |
| 715 | * to each of the "per device" structures. |
| 716 | * This is the initialisation and cleanup code. |
| 717 | */ |
| 718 | static void ehci_mem_cleanup(struct oxu_hcd *oxu) |
| 719 | { |
| 720 | kfree(oxu->murb_pool); |
| 721 | oxu->murb_pool = NULL; |
| 722 | |
| 723 | if (oxu->async) |
| 724 | qh_put(oxu->async); |
| 725 | oxu->async = NULL; |
| 726 | |
| 727 | del_timer(&oxu->urb_timer); |
| 728 | |
| 729 | oxu->periodic = NULL; |
| 730 | |
| 731 | /* shadow periodic table */ |
| 732 | kfree(oxu->pshadow); |
| 733 | oxu->pshadow = NULL; |
| 734 | } |
| 735 | |
| 736 | /* Remember to add cleanup code (above) if you add anything here. |
| 737 | */ |
| 738 | static int ehci_mem_init(struct oxu_hcd *oxu, gfp_t flags) |
| 739 | { |
| 740 | int i; |
| 741 | |
| 742 | for (i = 0; i < oxu->periodic_size; i++) |
| 743 | oxu->mem->frame_list[i] = EHCI_LIST_END; |
| 744 | for (i = 0; i < QHEAD_NUM; i++) |
| 745 | oxu->qh_used[i] = 0; |
| 746 | for (i = 0; i < QTD_NUM; i++) |
| 747 | oxu->qtd_used[i] = 0; |
| 748 | |
| 749 | oxu->murb_pool = kcalloc(MURB_NUM, sizeof(struct oxu_murb), flags); |
| 750 | if (!oxu->murb_pool) |
| 751 | goto fail; |
| 752 | |
| 753 | for (i = 0; i < MURB_NUM; i++) |
| 754 | oxu->murb_used[i] = 0; |
| 755 | |
| 756 | oxu->async = oxu_qh_alloc(oxu); |
| 757 | if (!oxu->async) |
| 758 | goto fail; |
| 759 | |
| 760 | oxu->periodic = (__le32 *) &oxu->mem->frame_list; |
| 761 | oxu->periodic_dma = virt_to_phys(oxu->periodic); |
| 762 | |
| 763 | for (i = 0; i < oxu->periodic_size; i++) |
| 764 | oxu->periodic[i] = EHCI_LIST_END; |
| 765 | |
| 766 | /* software shadow of hardware table */ |
| 767 | oxu->pshadow = kcalloc(oxu->periodic_size, sizeof(void *), flags); |
| 768 | if (oxu->pshadow != NULL) |
| 769 | return 0; |
| 770 | |
| 771 | fail: |
| 772 | oxu_dbg(oxu, "couldn't init memory\n"); |
| 773 | ehci_mem_cleanup(oxu); |
| 774 | return -ENOMEM; |
| 775 | } |
| 776 | |
| 777 | /* Fill a qtd, returning how much of the buffer we were able to queue up. |
| 778 | */ |
| 779 | static int qtd_fill(struct ehci_qtd *qtd, dma_addr_t buf, size_t len, |
| 780 | int token, int maxpacket) |
| 781 | { |
| 782 | int i, count; |
| 783 | u64 addr = buf; |
| 784 | |
| 785 | /* one buffer entry per 4K ... first might be short or unaligned */ |
| 786 | qtd->hw_buf[0] = cpu_to_le32((u32)addr); |
| 787 | qtd->hw_buf_hi[0] = cpu_to_le32((u32)(addr >> 32)); |
| 788 | count = 0x1000 - (buf & 0x0fff); /* rest of that page */ |
| 789 | if (likely(len < count)) /* ... iff needed */ |
| 790 | count = len; |
| 791 | else { |
| 792 | buf += 0x1000; |
| 793 | buf &= ~0x0fff; |
| 794 | |
| 795 | /* per-qtd limit: from 16K to 20K (best alignment) */ |
| 796 | for (i = 1; count < len && i < 5; i++) { |
| 797 | addr = buf; |
| 798 | qtd->hw_buf[i] = cpu_to_le32((u32)addr); |
| 799 | qtd->hw_buf_hi[i] = cpu_to_le32((u32)(addr >> 32)); |
| 800 | buf += 0x1000; |
| 801 | if ((count + 0x1000) < len) |
| 802 | count += 0x1000; |
| 803 | else |
| 804 | count = len; |
| 805 | } |
| 806 | |
| 807 | /* short packets may only terminate transfers */ |
| 808 | if (count != len) |
| 809 | count -= (count % maxpacket); |
| 810 | } |
| 811 | qtd->hw_token = cpu_to_le32((count << 16) | token); |
| 812 | qtd->length = count; |
| 813 | |
| 814 | return count; |
| 815 | } |
| 816 | |
| 817 | static inline void qh_update(struct oxu_hcd *oxu, |
| 818 | struct ehci_qh *qh, struct ehci_qtd *qtd) |
| 819 | { |
| 820 | /* writes to an active overlay are unsafe */ |
| 821 | BUG_ON(qh->qh_state != QH_STATE_IDLE); |
| 822 | |
| 823 | qh->hw_qtd_next = QTD_NEXT(qtd->qtd_dma); |
| 824 | qh->hw_alt_next = EHCI_LIST_END; |
| 825 | |
| 826 | /* Except for control endpoints, we make hardware maintain data |
| 827 | * toggle (like OHCI) ... here (re)initialize the toggle in the QH, |
| 828 | * and set the pseudo-toggle in udev. Only usb_clear_halt() will |
| 829 | * ever clear it. |
| 830 | */ |
| 831 | if (!(qh->hw_info1 & cpu_to_le32(1 << 14))) { |
| 832 | unsigned is_out, epnum; |
| 833 | |
| 834 | is_out = !(qtd->hw_token & cpu_to_le32(1 << 8)); |
| 835 | epnum = (le32_to_cpup(&qh->hw_info1) >> 8) & 0x0f; |
| 836 | if (unlikely(!usb_gettoggle(qh->dev, epnum, is_out))) { |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 837 | qh->hw_token &= ~cpu_to_le32(QTD_TOGGLE); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 838 | usb_settoggle(qh->dev, epnum, is_out, 1); |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | /* HC must see latest qtd and qh data before we clear ACTIVE+HALT */ |
| 843 | wmb(); |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 844 | qh->hw_token &= cpu_to_le32(QTD_TOGGLE | QTD_STS_PING); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 845 | } |
| 846 | |
| 847 | /* If it weren't for a common silicon quirk (writing the dummy into the qh |
| 848 | * overlay, so qh->hw_token wrongly becomes inactive/halted), only fault |
| 849 | * recovery (including urb dequeue) would need software changes to a QH... |
| 850 | */ |
| 851 | static void qh_refresh(struct oxu_hcd *oxu, struct ehci_qh *qh) |
| 852 | { |
| 853 | struct ehci_qtd *qtd; |
| 854 | |
| 855 | if (list_empty(&qh->qtd_list)) |
| 856 | qtd = qh->dummy; |
| 857 | else { |
| 858 | qtd = list_entry(qh->qtd_list.next, |
| 859 | struct ehci_qtd, qtd_list); |
| 860 | /* first qtd may already be partially processed */ |
| 861 | if (cpu_to_le32(qtd->qtd_dma) == qh->hw_current) |
| 862 | qtd = NULL; |
| 863 | } |
| 864 | |
| 865 | if (qtd) |
| 866 | qh_update(oxu, qh, qtd); |
| 867 | } |
| 868 | |
| 869 | static void qtd_copy_status(struct oxu_hcd *oxu, struct urb *urb, |
| 870 | size_t length, u32 token) |
| 871 | { |
| 872 | /* count IN/OUT bytes, not SETUP (even short packets) */ |
| 873 | if (likely(QTD_PID(token) != 2)) |
| 874 | urb->actual_length += length - QTD_LENGTH(token); |
| 875 | |
| 876 | /* don't modify error codes */ |
| 877 | if (unlikely(urb->status != -EINPROGRESS)) |
| 878 | return; |
| 879 | |
| 880 | /* force cleanup after short read; not always an error */ |
| 881 | if (unlikely(IS_SHORT_READ(token))) |
| 882 | urb->status = -EREMOTEIO; |
| 883 | |
| 884 | /* serious "can't proceed" faults reported by the hardware */ |
| 885 | if (token & QTD_STS_HALT) { |
| 886 | if (token & QTD_STS_BABBLE) { |
| 887 | /* FIXME "must" disable babbling device's port too */ |
| 888 | urb->status = -EOVERFLOW; |
| 889 | } else if (token & QTD_STS_MMF) { |
| 890 | /* fs/ls interrupt xfer missed the complete-split */ |
| 891 | urb->status = -EPROTO; |
| 892 | } else if (token & QTD_STS_DBE) { |
| 893 | urb->status = (QTD_PID(token) == 1) /* IN ? */ |
| 894 | ? -ENOSR /* hc couldn't read data */ |
| 895 | : -ECOMM; /* hc couldn't write data */ |
| 896 | } else if (token & QTD_STS_XACT) { |
| 897 | /* timeout, bad crc, wrong PID, etc; retried */ |
| 898 | if (QTD_CERR(token)) |
| 899 | urb->status = -EPIPE; |
| 900 | else { |
| 901 | oxu_dbg(oxu, "devpath %s ep%d%s 3strikes\n", |
| 902 | urb->dev->devpath, |
| 903 | usb_pipeendpoint(urb->pipe), |
| 904 | usb_pipein(urb->pipe) ? "in" : "out"); |
| 905 | urb->status = -EPROTO; |
| 906 | } |
| 907 | /* CERR nonzero + no errors + halt --> stall */ |
| 908 | } else if (QTD_CERR(token)) |
| 909 | urb->status = -EPIPE; |
| 910 | else /* unknown */ |
| 911 | urb->status = -EPROTO; |
| 912 | |
| 913 | oxu_vdbg(oxu, "dev%d ep%d%s qtd token %08x --> status %d\n", |
| 914 | usb_pipedevice(urb->pipe), |
| 915 | usb_pipeendpoint(urb->pipe), |
| 916 | usb_pipein(urb->pipe) ? "in" : "out", |
| 917 | token, urb->status); |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | static void ehci_urb_done(struct oxu_hcd *oxu, struct urb *urb) |
| 922 | __releases(oxu->lock) |
| 923 | __acquires(oxu->lock) |
| 924 | { |
| 925 | if (likely(urb->hcpriv != NULL)) { |
| 926 | struct ehci_qh *qh = (struct ehci_qh *) urb->hcpriv; |
| 927 | |
| 928 | /* S-mask in a QH means it's an interrupt urb */ |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 929 | if ((qh->hw_info2 & cpu_to_le32(QH_SMASK)) != 0) { |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 930 | |
| 931 | /* ... update hc-wide periodic stats (for usbfs) */ |
| 932 | oxu_to_hcd(oxu)->self.bandwidth_int_reqs--; |
| 933 | } |
| 934 | qh_put(qh); |
| 935 | } |
| 936 | |
| 937 | urb->hcpriv = NULL; |
| 938 | switch (urb->status) { |
| 939 | case -EINPROGRESS: /* success */ |
| 940 | urb->status = 0; |
| 941 | default: /* fault */ |
| 942 | break; |
| 943 | case -EREMOTEIO: /* fault or normal */ |
| 944 | if (!(urb->transfer_flags & URB_SHORT_NOT_OK)) |
| 945 | urb->status = 0; |
| 946 | break; |
| 947 | case -ECONNRESET: /* canceled */ |
| 948 | case -ENOENT: |
| 949 | break; |
| 950 | } |
| 951 | |
| 952 | #ifdef OXU_URB_TRACE |
| 953 | oxu_dbg(oxu, "%s %s urb %p ep%d%s status %d len %d/%d\n", |
| 954 | __func__, urb->dev->devpath, urb, |
| 955 | usb_pipeendpoint(urb->pipe), |
| 956 | usb_pipein(urb->pipe) ? "in" : "out", |
| 957 | urb->status, |
| 958 | urb->actual_length, urb->transfer_buffer_length); |
| 959 | #endif |
| 960 | |
| 961 | /* complete() can reenter this HCD */ |
| 962 | spin_unlock(&oxu->lock); |
| 963 | usb_hcd_giveback_urb(oxu_to_hcd(oxu), urb, urb->status); |
| 964 | spin_lock(&oxu->lock); |
| 965 | } |
| 966 | |
| 967 | static void start_unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh); |
| 968 | static void unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh); |
| 969 | |
| 970 | static void intr_deschedule(struct oxu_hcd *oxu, struct ehci_qh *qh); |
| 971 | static int qh_schedule(struct oxu_hcd *oxu, struct ehci_qh *qh); |
| 972 | |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 973 | #define HALT_BIT cpu_to_le32(QTD_STS_HALT) |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 974 | |
| 975 | /* Process and free completed qtds for a qh, returning URBs to drivers. |
| 976 | * Chases up to qh->hw_current. Returns number of completions called, |
| 977 | * indicating how much "real" work we did. |
| 978 | */ |
| 979 | static unsigned qh_completions(struct oxu_hcd *oxu, struct ehci_qh *qh) |
| 980 | { |
| 981 | struct ehci_qtd *last = NULL, *end = qh->dummy; |
| 982 | struct list_head *entry, *tmp; |
| 983 | int stopped; |
| 984 | unsigned count = 0; |
| 985 | int do_status = 0; |
| 986 | u8 state; |
| 987 | struct oxu_murb *murb = NULL; |
| 988 | |
| 989 | if (unlikely(list_empty(&qh->qtd_list))) |
| 990 | return count; |
| 991 | |
| 992 | /* completions (or tasks on other cpus) must never clobber HALT |
| 993 | * till we've gone through and cleaned everything up, even when |
| 994 | * they add urbs to this qh's queue or mark them for unlinking. |
| 995 | * |
| 996 | * NOTE: unlinking expects to be done in queue order. |
| 997 | */ |
| 998 | state = qh->qh_state; |
| 999 | qh->qh_state = QH_STATE_COMPLETING; |
| 1000 | stopped = (state == QH_STATE_IDLE); |
| 1001 | |
| 1002 | /* remove de-activated QTDs from front of queue. |
| 1003 | * after faults (including short reads), cleanup this urb |
| 1004 | * then let the queue advance. |
| 1005 | * if queue is stopped, handles unlinks. |
| 1006 | */ |
| 1007 | list_for_each_safe(entry, tmp, &qh->qtd_list) { |
| 1008 | struct ehci_qtd *qtd; |
| 1009 | struct urb *urb; |
| 1010 | u32 token = 0; |
| 1011 | |
| 1012 | qtd = list_entry(entry, struct ehci_qtd, qtd_list); |
| 1013 | urb = qtd->urb; |
| 1014 | |
| 1015 | /* Clean up any state from previous QTD ...*/ |
| 1016 | if (last) { |
| 1017 | if (likely(last->urb != urb)) { |
| 1018 | if (last->urb->complete == NULL) { |
| 1019 | murb = (struct oxu_murb *) last->urb; |
| 1020 | last->urb = murb->main; |
| 1021 | if (murb->last) { |
| 1022 | ehci_urb_done(oxu, last->urb); |
| 1023 | count++; |
| 1024 | } |
| 1025 | oxu_murb_free(oxu, murb); |
| 1026 | } else { |
| 1027 | ehci_urb_done(oxu, last->urb); |
| 1028 | count++; |
| 1029 | } |
| 1030 | } |
| 1031 | oxu_qtd_free(oxu, last); |
| 1032 | last = NULL; |
| 1033 | } |
| 1034 | |
| 1035 | /* ignore urbs submitted during completions we reported */ |
| 1036 | if (qtd == end) |
| 1037 | break; |
| 1038 | |
| 1039 | /* hardware copies qtd out of qh overlay */ |
| 1040 | rmb(); |
| 1041 | token = le32_to_cpu(qtd->hw_token); |
| 1042 | |
| 1043 | /* always clean up qtds the hc de-activated */ |
| 1044 | if ((token & QTD_STS_ACTIVE) == 0) { |
| 1045 | |
| 1046 | if ((token & QTD_STS_HALT) != 0) { |
| 1047 | stopped = 1; |
| 1048 | |
| 1049 | /* magic dummy for some short reads; qh won't advance. |
| 1050 | * that silicon quirk can kick in with this dummy too. |
| 1051 | */ |
| 1052 | } else if (IS_SHORT_READ(token) && |
| 1053 | !(qtd->hw_alt_next & EHCI_LIST_END)) { |
| 1054 | stopped = 1; |
| 1055 | goto halt; |
| 1056 | } |
| 1057 | |
| 1058 | /* stop scanning when we reach qtds the hc is using */ |
| 1059 | } else if (likely(!stopped && |
| 1060 | HC_IS_RUNNING(oxu_to_hcd(oxu)->state))) { |
| 1061 | break; |
| 1062 | |
| 1063 | } else { |
| 1064 | stopped = 1; |
| 1065 | |
| 1066 | if (unlikely(!HC_IS_RUNNING(oxu_to_hcd(oxu)->state))) |
| 1067 | urb->status = -ESHUTDOWN; |
| 1068 | |
| 1069 | /* ignore active urbs unless some previous qtd |
| 1070 | * for the urb faulted (including short read) or |
| 1071 | * its urb was canceled. we may patch qh or qtds. |
| 1072 | */ |
| 1073 | if (likely(urb->status == -EINPROGRESS)) |
| 1074 | continue; |
| 1075 | |
| 1076 | /* issue status after short control reads */ |
| 1077 | if (unlikely(do_status != 0) |
| 1078 | && QTD_PID(token) == 0 /* OUT */) { |
| 1079 | do_status = 0; |
| 1080 | continue; |
| 1081 | } |
| 1082 | |
| 1083 | /* token in overlay may be most current */ |
| 1084 | if (state == QH_STATE_IDLE |
| 1085 | && cpu_to_le32(qtd->qtd_dma) |
| 1086 | == qh->hw_current) |
| 1087 | token = le32_to_cpu(qh->hw_token); |
| 1088 | |
| 1089 | /* force halt for unlinked or blocked qh, so we'll |
| 1090 | * patch the qh later and so that completions can't |
| 1091 | * activate it while we "know" it's stopped. |
| 1092 | */ |
| 1093 | if ((HALT_BIT & qh->hw_token) == 0) { |
| 1094 | halt: |
| 1095 | qh->hw_token |= HALT_BIT; |
| 1096 | wmb(); |
| 1097 | } |
| 1098 | } |
| 1099 | |
| 1100 | /* Remove it from the queue */ |
| 1101 | qtd_copy_status(oxu, urb->complete ? |
| 1102 | urb : ((struct oxu_murb *) urb)->main, |
| 1103 | qtd->length, token); |
| 1104 | if ((usb_pipein(qtd->urb->pipe)) && |
| 1105 | (NULL != qtd->transfer_buffer)) |
| 1106 | memcpy(qtd->transfer_buffer, qtd->buffer, qtd->length); |
| 1107 | do_status = (urb->status == -EREMOTEIO) |
| 1108 | && usb_pipecontrol(urb->pipe); |
| 1109 | |
| 1110 | if (stopped && qtd->qtd_list.prev != &qh->qtd_list) { |
| 1111 | last = list_entry(qtd->qtd_list.prev, |
| 1112 | struct ehci_qtd, qtd_list); |
| 1113 | last->hw_next = qtd->hw_next; |
| 1114 | } |
| 1115 | list_del(&qtd->qtd_list); |
| 1116 | last = qtd; |
| 1117 | } |
| 1118 | |
| 1119 | /* last urb's completion might still need calling */ |
| 1120 | if (likely(last != NULL)) { |
| 1121 | if (last->urb->complete == NULL) { |
| 1122 | murb = (struct oxu_murb *) last->urb; |
| 1123 | last->urb = murb->main; |
| 1124 | if (murb->last) { |
| 1125 | ehci_urb_done(oxu, last->urb); |
| 1126 | count++; |
| 1127 | } |
| 1128 | oxu_murb_free(oxu, murb); |
| 1129 | } else { |
| 1130 | ehci_urb_done(oxu, last->urb); |
| 1131 | count++; |
| 1132 | } |
| 1133 | oxu_qtd_free(oxu, last); |
| 1134 | } |
| 1135 | |
| 1136 | /* restore original state; caller must unlink or relink */ |
| 1137 | qh->qh_state = state; |
| 1138 | |
| 1139 | /* be sure the hardware's done with the qh before refreshing |
| 1140 | * it after fault cleanup, or recovering from silicon wrongly |
| 1141 | * overlaying the dummy qtd (which reduces DMA chatter). |
| 1142 | */ |
| 1143 | if (stopped != 0 || qh->hw_qtd_next == EHCI_LIST_END) { |
| 1144 | switch (state) { |
| 1145 | case QH_STATE_IDLE: |
| 1146 | qh_refresh(oxu, qh); |
| 1147 | break; |
| 1148 | case QH_STATE_LINKED: |
| 1149 | /* should be rare for periodic transfers, |
| 1150 | * except maybe high bandwidth ... |
| 1151 | */ |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 1152 | if ((cpu_to_le32(QH_SMASK) |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 1153 | & qh->hw_info2) != 0) { |
| 1154 | intr_deschedule(oxu, qh); |
| 1155 | (void) qh_schedule(oxu, qh); |
| 1156 | } else |
| 1157 | unlink_async(oxu, qh); |
| 1158 | break; |
| 1159 | /* otherwise, unlink already started */ |
| 1160 | } |
| 1161 | } |
| 1162 | |
| 1163 | return count; |
| 1164 | } |
| 1165 | |
| 1166 | /* High bandwidth multiplier, as encoded in highspeed endpoint descriptors */ |
| 1167 | #define hb_mult(wMaxPacketSize) (1 + (((wMaxPacketSize) >> 11) & 0x03)) |
| 1168 | /* ... and packet size, for any kind of endpoint descriptor */ |
| 1169 | #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff) |
| 1170 | |
| 1171 | /* Reverse of qh_urb_transaction: free a list of TDs. |
| 1172 | * used for cleanup after errors, before HC sees an URB's TDs. |
| 1173 | */ |
| 1174 | static void qtd_list_free(struct oxu_hcd *oxu, |
| 1175 | struct urb *urb, struct list_head *qtd_list) |
| 1176 | { |
| 1177 | struct list_head *entry, *temp; |
| 1178 | |
| 1179 | list_for_each_safe(entry, temp, qtd_list) { |
| 1180 | struct ehci_qtd *qtd; |
| 1181 | |
| 1182 | qtd = list_entry(entry, struct ehci_qtd, qtd_list); |
| 1183 | list_del(&qtd->qtd_list); |
| 1184 | oxu_qtd_free(oxu, qtd); |
| 1185 | } |
| 1186 | } |
| 1187 | |
| 1188 | /* Create a list of filled qtds for this URB; won't link into qh. |
| 1189 | */ |
| 1190 | static struct list_head *qh_urb_transaction(struct oxu_hcd *oxu, |
| 1191 | struct urb *urb, |
| 1192 | struct list_head *head, |
| 1193 | gfp_t flags) |
| 1194 | { |
| 1195 | struct ehci_qtd *qtd, *qtd_prev; |
| 1196 | dma_addr_t buf; |
| 1197 | int len, maxpacket; |
| 1198 | int is_input; |
| 1199 | u32 token; |
| 1200 | void *transfer_buf = NULL; |
| 1201 | int ret; |
| 1202 | |
| 1203 | /* |
| 1204 | * URBs map to sequences of QTDs: one logical transaction |
| 1205 | */ |
| 1206 | qtd = ehci_qtd_alloc(oxu); |
| 1207 | if (unlikely(!qtd)) |
| 1208 | return NULL; |
| 1209 | list_add_tail(&qtd->qtd_list, head); |
| 1210 | qtd->urb = urb; |
| 1211 | |
| 1212 | token = QTD_STS_ACTIVE; |
| 1213 | token |= (EHCI_TUNE_CERR << 10); |
| 1214 | /* for split transactions, SplitXState initialized to zero */ |
| 1215 | |
| 1216 | len = urb->transfer_buffer_length; |
| 1217 | is_input = usb_pipein(urb->pipe); |
| 1218 | if (!urb->transfer_buffer && urb->transfer_buffer_length && is_input) |
| 1219 | urb->transfer_buffer = phys_to_virt(urb->transfer_dma); |
| 1220 | |
| 1221 | if (usb_pipecontrol(urb->pipe)) { |
| 1222 | /* SETUP pid */ |
| 1223 | ret = oxu_buf_alloc(oxu, qtd, sizeof(struct usb_ctrlrequest)); |
| 1224 | if (ret) |
| 1225 | goto cleanup; |
| 1226 | |
| 1227 | qtd_fill(qtd, qtd->buffer_dma, sizeof(struct usb_ctrlrequest), |
| 1228 | token | (2 /* "setup" */ << 8), 8); |
| 1229 | memcpy(qtd->buffer, qtd->urb->setup_packet, |
| 1230 | sizeof(struct usb_ctrlrequest)); |
| 1231 | |
| 1232 | /* ... and always at least one more pid */ |
| 1233 | token ^= QTD_TOGGLE; |
| 1234 | qtd_prev = qtd; |
| 1235 | qtd = ehci_qtd_alloc(oxu); |
| 1236 | if (unlikely(!qtd)) |
| 1237 | goto cleanup; |
| 1238 | qtd->urb = urb; |
| 1239 | qtd_prev->hw_next = QTD_NEXT(qtd->qtd_dma); |
| 1240 | list_add_tail(&qtd->qtd_list, head); |
| 1241 | |
| 1242 | /* for zero length DATA stages, STATUS is always IN */ |
| 1243 | if (len == 0) |
| 1244 | token |= (1 /* "in" */ << 8); |
| 1245 | } |
| 1246 | |
| 1247 | /* |
| 1248 | * Data transfer stage: buffer setup |
| 1249 | */ |
| 1250 | |
| 1251 | ret = oxu_buf_alloc(oxu, qtd, len); |
| 1252 | if (ret) |
| 1253 | goto cleanup; |
| 1254 | |
| 1255 | buf = qtd->buffer_dma; |
| 1256 | transfer_buf = urb->transfer_buffer; |
| 1257 | |
| 1258 | if (!is_input) |
| 1259 | memcpy(qtd->buffer, qtd->urb->transfer_buffer, len); |
| 1260 | |
| 1261 | if (is_input) |
| 1262 | token |= (1 /* "in" */ << 8); |
| 1263 | /* else it's already initted to "out" pid (0 << 8) */ |
| 1264 | |
| 1265 | maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input)); |
| 1266 | |
| 1267 | /* |
| 1268 | * buffer gets wrapped in one or more qtds; |
| 1269 | * last one may be "short" (including zero len) |
| 1270 | * and may serve as a control status ack |
| 1271 | */ |
| 1272 | for (;;) { |
| 1273 | int this_qtd_len; |
| 1274 | |
| 1275 | this_qtd_len = qtd_fill(qtd, buf, len, token, maxpacket); |
| 1276 | qtd->transfer_buffer = transfer_buf; |
| 1277 | len -= this_qtd_len; |
| 1278 | buf += this_qtd_len; |
| 1279 | transfer_buf += this_qtd_len; |
| 1280 | if (is_input) |
| 1281 | qtd->hw_alt_next = oxu->async->hw_alt_next; |
| 1282 | |
| 1283 | /* qh makes control packets use qtd toggle; maybe switch it */ |
| 1284 | if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0) |
| 1285 | token ^= QTD_TOGGLE; |
| 1286 | |
| 1287 | if (likely(len <= 0)) |
| 1288 | break; |
| 1289 | |
| 1290 | qtd_prev = qtd; |
| 1291 | qtd = ehci_qtd_alloc(oxu); |
| 1292 | if (unlikely(!qtd)) |
| 1293 | goto cleanup; |
| 1294 | if (likely(len > 0)) { |
| 1295 | ret = oxu_buf_alloc(oxu, qtd, len); |
| 1296 | if (ret) |
| 1297 | goto cleanup; |
| 1298 | } |
| 1299 | qtd->urb = urb; |
| 1300 | qtd_prev->hw_next = QTD_NEXT(qtd->qtd_dma); |
| 1301 | list_add_tail(&qtd->qtd_list, head); |
| 1302 | } |
| 1303 | |
| 1304 | /* unless the bulk/interrupt caller wants a chance to clean |
| 1305 | * up after short reads, hc should advance qh past this urb |
| 1306 | */ |
| 1307 | if (likely((urb->transfer_flags & URB_SHORT_NOT_OK) == 0 |
| 1308 | || usb_pipecontrol(urb->pipe))) |
| 1309 | qtd->hw_alt_next = EHCI_LIST_END; |
| 1310 | |
| 1311 | /* |
| 1312 | * control requests may need a terminating data "status" ack; |
| 1313 | * bulk ones may need a terminating short packet (zero length). |
| 1314 | */ |
| 1315 | if (likely(urb->transfer_buffer_length != 0)) { |
| 1316 | int one_more = 0; |
| 1317 | |
| 1318 | if (usb_pipecontrol(urb->pipe)) { |
| 1319 | one_more = 1; |
| 1320 | token ^= 0x0100; /* "in" <--> "out" */ |
| 1321 | token |= QTD_TOGGLE; /* force DATA1 */ |
| 1322 | } else if (usb_pipebulk(urb->pipe) |
| 1323 | && (urb->transfer_flags & URB_ZERO_PACKET) |
| 1324 | && !(urb->transfer_buffer_length % maxpacket)) { |
| 1325 | one_more = 1; |
| 1326 | } |
| 1327 | if (one_more) { |
| 1328 | qtd_prev = qtd; |
| 1329 | qtd = ehci_qtd_alloc(oxu); |
| 1330 | if (unlikely(!qtd)) |
| 1331 | goto cleanup; |
| 1332 | qtd->urb = urb; |
| 1333 | qtd_prev->hw_next = QTD_NEXT(qtd->qtd_dma); |
| 1334 | list_add_tail(&qtd->qtd_list, head); |
| 1335 | |
| 1336 | /* never any data in such packets */ |
| 1337 | qtd_fill(qtd, 0, 0, token, 0); |
| 1338 | } |
| 1339 | } |
| 1340 | |
| 1341 | /* by default, enable interrupt on urb completion */ |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 1342 | qtd->hw_token |= cpu_to_le32(QTD_IOC); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 1343 | return head; |
| 1344 | |
| 1345 | cleanup: |
| 1346 | qtd_list_free(oxu, urb, head); |
| 1347 | return NULL; |
| 1348 | } |
| 1349 | |
| 1350 | /* Each QH holds a qtd list; a QH is used for everything except iso. |
| 1351 | * |
| 1352 | * For interrupt urbs, the scheduler must set the microframe scheduling |
| 1353 | * mask(s) each time the QH gets scheduled. For highspeed, that's |
| 1354 | * just one microframe in the s-mask. For split interrupt transactions |
| 1355 | * there are additional complications: c-mask, maybe FSTNs. |
| 1356 | */ |
| 1357 | static struct ehci_qh *qh_make(struct oxu_hcd *oxu, |
| 1358 | struct urb *urb, gfp_t flags) |
| 1359 | { |
| 1360 | struct ehci_qh *qh = oxu_qh_alloc(oxu); |
| 1361 | u32 info1 = 0, info2 = 0; |
| 1362 | int is_input, type; |
| 1363 | int maxp = 0; |
| 1364 | |
| 1365 | if (!qh) |
| 1366 | return qh; |
| 1367 | |
| 1368 | /* |
| 1369 | * init endpoint/device data for this QH |
| 1370 | */ |
| 1371 | info1 |= usb_pipeendpoint(urb->pipe) << 8; |
| 1372 | info1 |= usb_pipedevice(urb->pipe) << 0; |
| 1373 | |
| 1374 | is_input = usb_pipein(urb->pipe); |
| 1375 | type = usb_pipetype(urb->pipe); |
| 1376 | maxp = usb_maxpacket(urb->dev, urb->pipe, !is_input); |
| 1377 | |
| 1378 | /* Compute interrupt scheduling parameters just once, and save. |
| 1379 | * - allowing for high bandwidth, how many nsec/uframe are used? |
| 1380 | * - split transactions need a second CSPLIT uframe; same question |
| 1381 | * - splits also need a schedule gap (for full/low speed I/O) |
| 1382 | * - qh has a polling interval |
| 1383 | * |
| 1384 | * For control/bulk requests, the HC or TT handles these. |
| 1385 | */ |
| 1386 | if (type == PIPE_INTERRUPT) { |
| 1387 | qh->usecs = NS_TO_US(usb_calc_bus_time(USB_SPEED_HIGH, |
| 1388 | is_input, 0, |
| 1389 | hb_mult(maxp) * max_packet(maxp))); |
| 1390 | qh->start = NO_FRAME; |
| 1391 | |
| 1392 | if (urb->dev->speed == USB_SPEED_HIGH) { |
| 1393 | qh->c_usecs = 0; |
| 1394 | qh->gap_uf = 0; |
| 1395 | |
| 1396 | qh->period = urb->interval >> 3; |
| 1397 | if (qh->period == 0 && urb->interval != 1) { |
| 1398 | /* NOTE interval 2 or 4 uframes could work. |
| 1399 | * But interval 1 scheduling is simpler, and |
| 1400 | * includes high bandwidth. |
| 1401 | */ |
Greg Kroah-Hartman | b5f5bfe | 2012-05-01 21:33:43 -0700 | [diff] [blame] | 1402 | oxu_dbg(oxu, "intr period %d uframes, NYET!\n", |
| 1403 | urb->interval); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 1404 | goto done; |
| 1405 | } |
| 1406 | } else { |
| 1407 | struct usb_tt *tt = urb->dev->tt; |
| 1408 | int think_time; |
| 1409 | |
| 1410 | /* gap is f(FS/LS transfer times) */ |
| 1411 | qh->gap_uf = 1 + usb_calc_bus_time(urb->dev->speed, |
| 1412 | is_input, 0, maxp) / (125 * 1000); |
| 1413 | |
| 1414 | /* FIXME this just approximates SPLIT/CSPLIT times */ |
| 1415 | if (is_input) { /* SPLIT, gap, CSPLIT+DATA */ |
| 1416 | qh->c_usecs = qh->usecs + HS_USECS(0); |
| 1417 | qh->usecs = HS_USECS(1); |
| 1418 | } else { /* SPLIT+DATA, gap, CSPLIT */ |
| 1419 | qh->usecs += HS_USECS(1); |
| 1420 | qh->c_usecs = HS_USECS(0); |
| 1421 | } |
| 1422 | |
| 1423 | think_time = tt ? tt->think_time : 0; |
| 1424 | qh->tt_usecs = NS_TO_US(think_time + |
| 1425 | usb_calc_bus_time(urb->dev->speed, |
| 1426 | is_input, 0, max_packet(maxp))); |
| 1427 | qh->period = urb->interval; |
| 1428 | } |
| 1429 | } |
| 1430 | |
| 1431 | /* support for tt scheduling, and access to toggles */ |
| 1432 | qh->dev = urb->dev; |
| 1433 | |
| 1434 | /* using TT? */ |
| 1435 | switch (urb->dev->speed) { |
| 1436 | case USB_SPEED_LOW: |
| 1437 | info1 |= (1 << 12); /* EPS "low" */ |
| 1438 | /* FALL THROUGH */ |
| 1439 | |
| 1440 | case USB_SPEED_FULL: |
| 1441 | /* EPS 0 means "full" */ |
| 1442 | if (type != PIPE_INTERRUPT) |
| 1443 | info1 |= (EHCI_TUNE_RL_TT << 28); |
| 1444 | if (type == PIPE_CONTROL) { |
| 1445 | info1 |= (1 << 27); /* for TT */ |
| 1446 | info1 |= 1 << 14; /* toggle from qtd */ |
| 1447 | } |
| 1448 | info1 |= maxp << 16; |
| 1449 | |
| 1450 | info2 |= (EHCI_TUNE_MULT_TT << 30); |
| 1451 | info2 |= urb->dev->ttport << 23; |
| 1452 | |
| 1453 | /* NOTE: if (PIPE_INTERRUPT) { scheduler sets c-mask } */ |
| 1454 | |
| 1455 | break; |
| 1456 | |
| 1457 | case USB_SPEED_HIGH: /* no TT involved */ |
| 1458 | info1 |= (2 << 12); /* EPS "high" */ |
| 1459 | if (type == PIPE_CONTROL) { |
| 1460 | info1 |= (EHCI_TUNE_RL_HS << 28); |
| 1461 | info1 |= 64 << 16; /* usb2 fixed maxpacket */ |
| 1462 | info1 |= 1 << 14; /* toggle from qtd */ |
| 1463 | info2 |= (EHCI_TUNE_MULT_HS << 30); |
| 1464 | } else if (type == PIPE_BULK) { |
| 1465 | info1 |= (EHCI_TUNE_RL_HS << 28); |
| 1466 | info1 |= 512 << 16; /* usb2 fixed maxpacket */ |
| 1467 | info2 |= (EHCI_TUNE_MULT_HS << 30); |
| 1468 | } else { /* PIPE_INTERRUPT */ |
| 1469 | info1 |= max_packet(maxp) << 16; |
| 1470 | info2 |= hb_mult(maxp) << 30; |
| 1471 | } |
| 1472 | break; |
| 1473 | default: |
Greg Kroah-Hartman | b5f5bfe | 2012-05-01 21:33:43 -0700 | [diff] [blame] | 1474 | oxu_dbg(oxu, "bogus dev %p speed %d\n", urb->dev, urb->dev->speed); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 1475 | done: |
| 1476 | qh_put(qh); |
| 1477 | return NULL; |
| 1478 | } |
| 1479 | |
| 1480 | /* NOTE: if (PIPE_INTERRUPT) { scheduler sets s-mask } */ |
| 1481 | |
| 1482 | /* init as live, toggle clear, advance to dummy */ |
| 1483 | qh->qh_state = QH_STATE_IDLE; |
| 1484 | qh->hw_info1 = cpu_to_le32(info1); |
| 1485 | qh->hw_info2 = cpu_to_le32(info2); |
| 1486 | usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input, 1); |
| 1487 | qh_refresh(oxu, qh); |
| 1488 | return qh; |
| 1489 | } |
| 1490 | |
| 1491 | /* Move qh (and its qtds) onto async queue; maybe enable queue. |
| 1492 | */ |
| 1493 | static void qh_link_async(struct oxu_hcd *oxu, struct ehci_qh *qh) |
| 1494 | { |
| 1495 | __le32 dma = QH_NEXT(qh->qh_dma); |
| 1496 | struct ehci_qh *head; |
| 1497 | |
| 1498 | /* (re)start the async schedule? */ |
| 1499 | head = oxu->async; |
| 1500 | timer_action_done(oxu, TIMER_ASYNC_OFF); |
| 1501 | if (!head->qh_next.qh) { |
| 1502 | u32 cmd = readl(&oxu->regs->command); |
| 1503 | |
| 1504 | if (!(cmd & CMD_ASE)) { |
| 1505 | /* in case a clear of CMD_ASE didn't take yet */ |
| 1506 | (void)handshake(oxu, &oxu->regs->status, |
| 1507 | STS_ASS, 0, 150); |
| 1508 | cmd |= CMD_ASE | CMD_RUN; |
| 1509 | writel(cmd, &oxu->regs->command); |
| 1510 | oxu_to_hcd(oxu)->state = HC_STATE_RUNNING; |
| 1511 | /* posted write need not be known to HC yet ... */ |
| 1512 | } |
| 1513 | } |
| 1514 | |
| 1515 | /* clear halt and/or toggle; and maybe recover from silicon quirk */ |
| 1516 | if (qh->qh_state == QH_STATE_IDLE) |
| 1517 | qh_refresh(oxu, qh); |
| 1518 | |
| 1519 | /* splice right after start */ |
| 1520 | qh->qh_next = head->qh_next; |
| 1521 | qh->hw_next = head->hw_next; |
| 1522 | wmb(); |
| 1523 | |
| 1524 | head->qh_next.qh = qh; |
| 1525 | head->hw_next = dma; |
| 1526 | |
| 1527 | qh->qh_state = QH_STATE_LINKED; |
| 1528 | /* qtd completions reported later by interrupt */ |
| 1529 | } |
| 1530 | |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 1531 | #define QH_ADDR_MASK cpu_to_le32(0x7f) |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 1532 | |
| 1533 | /* |
| 1534 | * For control/bulk/interrupt, return QH with these TDs appended. |
| 1535 | * Allocates and initializes the QH if necessary. |
| 1536 | * Returns null if it can't allocate a QH it needs to. |
| 1537 | * If the QH has TDs (urbs) already, that's great. |
| 1538 | */ |
| 1539 | static struct ehci_qh *qh_append_tds(struct oxu_hcd *oxu, |
| 1540 | struct urb *urb, struct list_head *qtd_list, |
| 1541 | int epnum, void **ptr) |
| 1542 | { |
| 1543 | struct ehci_qh *qh = NULL; |
| 1544 | |
| 1545 | qh = (struct ehci_qh *) *ptr; |
| 1546 | if (unlikely(qh == NULL)) { |
| 1547 | /* can't sleep here, we have oxu->lock... */ |
| 1548 | qh = qh_make(oxu, urb, GFP_ATOMIC); |
| 1549 | *ptr = qh; |
| 1550 | } |
| 1551 | if (likely(qh != NULL)) { |
| 1552 | struct ehci_qtd *qtd; |
| 1553 | |
| 1554 | if (unlikely(list_empty(qtd_list))) |
| 1555 | qtd = NULL; |
| 1556 | else |
| 1557 | qtd = list_entry(qtd_list->next, struct ehci_qtd, |
| 1558 | qtd_list); |
| 1559 | |
| 1560 | /* control qh may need patching ... */ |
| 1561 | if (unlikely(epnum == 0)) { |
| 1562 | |
| 1563 | /* usb_reset_device() briefly reverts to address 0 */ |
| 1564 | if (usb_pipedevice(urb->pipe) == 0) |
| 1565 | qh->hw_info1 &= ~QH_ADDR_MASK; |
| 1566 | } |
| 1567 | |
| 1568 | /* just one way to queue requests: swap with the dummy qtd. |
| 1569 | * only hc or qh_refresh() ever modify the overlay. |
| 1570 | */ |
| 1571 | if (likely(qtd != NULL)) { |
| 1572 | struct ehci_qtd *dummy; |
| 1573 | dma_addr_t dma; |
| 1574 | __le32 token; |
| 1575 | |
| 1576 | /* to avoid racing the HC, use the dummy td instead of |
| 1577 | * the first td of our list (becomes new dummy). both |
| 1578 | * tds stay deactivated until we're done, when the |
| 1579 | * HC is allowed to fetch the old dummy (4.10.2). |
| 1580 | */ |
| 1581 | token = qtd->hw_token; |
| 1582 | qtd->hw_token = HALT_BIT; |
| 1583 | wmb(); |
| 1584 | dummy = qh->dummy; |
| 1585 | |
| 1586 | dma = dummy->qtd_dma; |
| 1587 | *dummy = *qtd; |
| 1588 | dummy->qtd_dma = dma; |
| 1589 | |
| 1590 | list_del(&qtd->qtd_list); |
| 1591 | list_add(&dummy->qtd_list, qtd_list); |
| 1592 | list_splice(qtd_list, qh->qtd_list.prev); |
| 1593 | |
| 1594 | ehci_qtd_init(qtd, qtd->qtd_dma); |
| 1595 | qh->dummy = qtd; |
| 1596 | |
| 1597 | /* hc must see the new dummy at list end */ |
| 1598 | dma = qtd->qtd_dma; |
| 1599 | qtd = list_entry(qh->qtd_list.prev, |
| 1600 | struct ehci_qtd, qtd_list); |
| 1601 | qtd->hw_next = QTD_NEXT(dma); |
| 1602 | |
| 1603 | /* let the hc process these next qtds */ |
| 1604 | dummy->hw_token = (token & ~(0x80)); |
| 1605 | wmb(); |
| 1606 | dummy->hw_token = token; |
| 1607 | |
| 1608 | urb->hcpriv = qh_get(qh); |
| 1609 | } |
| 1610 | } |
| 1611 | return qh; |
| 1612 | } |
| 1613 | |
| 1614 | static int submit_async(struct oxu_hcd *oxu, struct urb *urb, |
| 1615 | struct list_head *qtd_list, gfp_t mem_flags) |
| 1616 | { |
| 1617 | struct ehci_qtd *qtd; |
| 1618 | int epnum; |
| 1619 | unsigned long flags; |
| 1620 | struct ehci_qh *qh = NULL; |
| 1621 | int rc = 0; |
| 1622 | |
| 1623 | qtd = list_entry(qtd_list->next, struct ehci_qtd, qtd_list); |
| 1624 | epnum = urb->ep->desc.bEndpointAddress; |
| 1625 | |
| 1626 | #ifdef OXU_URB_TRACE |
| 1627 | oxu_dbg(oxu, "%s %s urb %p ep%d%s len %d, qtd %p [qh %p]\n", |
| 1628 | __func__, urb->dev->devpath, urb, |
| 1629 | epnum & 0x0f, (epnum & USB_DIR_IN) ? "in" : "out", |
| 1630 | urb->transfer_buffer_length, |
| 1631 | qtd, urb->ep->hcpriv); |
| 1632 | #endif |
| 1633 | |
| 1634 | spin_lock_irqsave(&oxu->lock, flags); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 1635 | if (unlikely(!HCD_HW_ACCESSIBLE(oxu_to_hcd(oxu)))) { |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 1636 | rc = -ESHUTDOWN; |
| 1637 | goto done; |
| 1638 | } |
| 1639 | |
| 1640 | qh = qh_append_tds(oxu, urb, qtd_list, epnum, &urb->ep->hcpriv); |
| 1641 | if (unlikely(qh == NULL)) { |
| 1642 | rc = -ENOMEM; |
| 1643 | goto done; |
| 1644 | } |
| 1645 | |
| 1646 | /* Control/bulk operations through TTs don't need scheduling, |
| 1647 | * the HC and TT handle it when the TT has a buffer ready. |
| 1648 | */ |
| 1649 | if (likely(qh->qh_state == QH_STATE_IDLE)) |
| 1650 | qh_link_async(oxu, qh_get(qh)); |
| 1651 | done: |
| 1652 | spin_unlock_irqrestore(&oxu->lock, flags); |
| 1653 | if (unlikely(qh == NULL)) |
| 1654 | qtd_list_free(oxu, urb, qtd_list); |
| 1655 | return rc; |
| 1656 | } |
| 1657 | |
| 1658 | /* The async qh for the qtds being reclaimed are now unlinked from the HC */ |
| 1659 | |
| 1660 | static void end_unlink_async(struct oxu_hcd *oxu) |
| 1661 | { |
| 1662 | struct ehci_qh *qh = oxu->reclaim; |
| 1663 | struct ehci_qh *next; |
| 1664 | |
| 1665 | timer_action_done(oxu, TIMER_IAA_WATCHDOG); |
| 1666 | |
| 1667 | qh->qh_state = QH_STATE_IDLE; |
| 1668 | qh->qh_next.qh = NULL; |
| 1669 | qh_put(qh); /* refcount from reclaim */ |
| 1670 | |
| 1671 | /* other unlink(s) may be pending (in QH_STATE_UNLINK_WAIT) */ |
| 1672 | next = qh->reclaim; |
| 1673 | oxu->reclaim = next; |
| 1674 | oxu->reclaim_ready = 0; |
| 1675 | qh->reclaim = NULL; |
| 1676 | |
| 1677 | qh_completions(oxu, qh); |
| 1678 | |
| 1679 | if (!list_empty(&qh->qtd_list) |
| 1680 | && HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) |
| 1681 | qh_link_async(oxu, qh); |
| 1682 | else { |
| 1683 | qh_put(qh); /* refcount from async list */ |
| 1684 | |
| 1685 | /* it's not free to turn the async schedule on/off; leave it |
| 1686 | * active but idle for a while once it empties. |
| 1687 | */ |
| 1688 | if (HC_IS_RUNNING(oxu_to_hcd(oxu)->state) |
| 1689 | && oxu->async->qh_next.qh == NULL) |
| 1690 | timer_action(oxu, TIMER_ASYNC_OFF); |
| 1691 | } |
| 1692 | |
| 1693 | if (next) { |
| 1694 | oxu->reclaim = NULL; |
| 1695 | start_unlink_async(oxu, next); |
| 1696 | } |
| 1697 | } |
| 1698 | |
| 1699 | /* makes sure the async qh will become idle */ |
| 1700 | /* caller must own oxu->lock */ |
| 1701 | |
| 1702 | static void start_unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh) |
| 1703 | { |
| 1704 | int cmd = readl(&oxu->regs->command); |
| 1705 | struct ehci_qh *prev; |
| 1706 | |
| 1707 | #ifdef DEBUG |
| 1708 | assert_spin_locked(&oxu->lock); |
| 1709 | if (oxu->reclaim || (qh->qh_state != QH_STATE_LINKED |
| 1710 | && qh->qh_state != QH_STATE_UNLINK_WAIT)) |
| 1711 | BUG(); |
| 1712 | #endif |
| 1713 | |
| 1714 | /* stop async schedule right now? */ |
| 1715 | if (unlikely(qh == oxu->async)) { |
| 1716 | /* can't get here without STS_ASS set */ |
| 1717 | if (oxu_to_hcd(oxu)->state != HC_STATE_HALT |
| 1718 | && !oxu->reclaim) { |
| 1719 | /* ... and CMD_IAAD clear */ |
| 1720 | writel(cmd & ~CMD_ASE, &oxu->regs->command); |
| 1721 | wmb(); |
| 1722 | /* handshake later, if we need to */ |
| 1723 | timer_action_done(oxu, TIMER_ASYNC_OFF); |
| 1724 | } |
| 1725 | return; |
| 1726 | } |
| 1727 | |
| 1728 | qh->qh_state = QH_STATE_UNLINK; |
| 1729 | oxu->reclaim = qh = qh_get(qh); |
| 1730 | |
| 1731 | prev = oxu->async; |
| 1732 | while (prev->qh_next.qh != qh) |
| 1733 | prev = prev->qh_next.qh; |
| 1734 | |
| 1735 | prev->hw_next = qh->hw_next; |
| 1736 | prev->qh_next = qh->qh_next; |
| 1737 | wmb(); |
| 1738 | |
| 1739 | if (unlikely(oxu_to_hcd(oxu)->state == HC_STATE_HALT)) { |
| 1740 | /* if (unlikely(qh->reclaim != 0)) |
| 1741 | * this will recurse, probably not much |
| 1742 | */ |
| 1743 | end_unlink_async(oxu); |
| 1744 | return; |
| 1745 | } |
| 1746 | |
| 1747 | oxu->reclaim_ready = 0; |
| 1748 | cmd |= CMD_IAAD; |
| 1749 | writel(cmd, &oxu->regs->command); |
| 1750 | (void) readl(&oxu->regs->command); |
| 1751 | timer_action(oxu, TIMER_IAA_WATCHDOG); |
| 1752 | } |
| 1753 | |
| 1754 | static void scan_async(struct oxu_hcd *oxu) |
| 1755 | { |
| 1756 | struct ehci_qh *qh; |
| 1757 | enum ehci_timer_action action = TIMER_IO_WATCHDOG; |
| 1758 | |
| 1759 | if (!++(oxu->stamp)) |
| 1760 | oxu->stamp++; |
| 1761 | timer_action_done(oxu, TIMER_ASYNC_SHRINK); |
| 1762 | rescan: |
| 1763 | qh = oxu->async->qh_next.qh; |
| 1764 | if (likely(qh != NULL)) { |
| 1765 | do { |
| 1766 | /* clean any finished work for this qh */ |
| 1767 | if (!list_empty(&qh->qtd_list) |
| 1768 | && qh->stamp != oxu->stamp) { |
| 1769 | int temp; |
| 1770 | |
| 1771 | /* unlinks could happen here; completion |
| 1772 | * reporting drops the lock. rescan using |
| 1773 | * the latest schedule, but don't rescan |
| 1774 | * qhs we already finished (no looping). |
| 1775 | */ |
| 1776 | qh = qh_get(qh); |
| 1777 | qh->stamp = oxu->stamp; |
| 1778 | temp = qh_completions(oxu, qh); |
| 1779 | qh_put(qh); |
| 1780 | if (temp != 0) |
| 1781 | goto rescan; |
| 1782 | } |
| 1783 | |
| 1784 | /* unlink idle entries, reducing HC PCI usage as well |
| 1785 | * as HCD schedule-scanning costs. delay for any qh |
| 1786 | * we just scanned, there's a not-unusual case that it |
| 1787 | * doesn't stay idle for long. |
| 1788 | * (plus, avoids some kind of re-activation race.) |
| 1789 | */ |
| 1790 | if (list_empty(&qh->qtd_list)) { |
| 1791 | if (qh->stamp == oxu->stamp) |
| 1792 | action = TIMER_ASYNC_SHRINK; |
| 1793 | else if (!oxu->reclaim |
| 1794 | && qh->qh_state == QH_STATE_LINKED) |
| 1795 | start_unlink_async(oxu, qh); |
| 1796 | } |
| 1797 | |
| 1798 | qh = qh->qh_next.qh; |
| 1799 | } while (qh); |
| 1800 | } |
| 1801 | if (action == TIMER_ASYNC_SHRINK) |
| 1802 | timer_action(oxu, TIMER_ASYNC_SHRINK); |
| 1803 | } |
| 1804 | |
| 1805 | /* |
| 1806 | * periodic_next_shadow - return "next" pointer on shadow list |
| 1807 | * @periodic: host pointer to qh/itd/sitd |
| 1808 | * @tag: hardware tag for type of this record |
| 1809 | */ |
| 1810 | static union ehci_shadow *periodic_next_shadow(union ehci_shadow *periodic, |
| 1811 | __le32 tag) |
| 1812 | { |
| 1813 | switch (tag) { |
| 1814 | default: |
| 1815 | case Q_TYPE_QH: |
| 1816 | return &periodic->qh->qh_next; |
| 1817 | } |
| 1818 | } |
| 1819 | |
| 1820 | /* caller must hold oxu->lock */ |
| 1821 | static void periodic_unlink(struct oxu_hcd *oxu, unsigned frame, void *ptr) |
| 1822 | { |
| 1823 | union ehci_shadow *prev_p = &oxu->pshadow[frame]; |
| 1824 | __le32 *hw_p = &oxu->periodic[frame]; |
| 1825 | union ehci_shadow here = *prev_p; |
| 1826 | |
| 1827 | /* find predecessor of "ptr"; hw and shadow lists are in sync */ |
| 1828 | while (here.ptr && here.ptr != ptr) { |
| 1829 | prev_p = periodic_next_shadow(prev_p, Q_NEXT_TYPE(*hw_p)); |
| 1830 | hw_p = here.hw_next; |
| 1831 | here = *prev_p; |
| 1832 | } |
| 1833 | /* an interrupt entry (at list end) could have been shared */ |
| 1834 | if (!here.ptr) |
| 1835 | return; |
| 1836 | |
| 1837 | /* update shadow and hardware lists ... the old "next" pointers |
| 1838 | * from ptr may still be in use, the caller updates them. |
| 1839 | */ |
| 1840 | *prev_p = *periodic_next_shadow(&here, Q_NEXT_TYPE(*hw_p)); |
| 1841 | *hw_p = *here.hw_next; |
| 1842 | } |
| 1843 | |
| 1844 | /* how many of the uframe's 125 usecs are allocated? */ |
| 1845 | static unsigned short periodic_usecs(struct oxu_hcd *oxu, |
| 1846 | unsigned frame, unsigned uframe) |
| 1847 | { |
| 1848 | __le32 *hw_p = &oxu->periodic[frame]; |
| 1849 | union ehci_shadow *q = &oxu->pshadow[frame]; |
| 1850 | unsigned usecs = 0; |
| 1851 | |
| 1852 | while (q->ptr) { |
| 1853 | switch (Q_NEXT_TYPE(*hw_p)) { |
| 1854 | case Q_TYPE_QH: |
| 1855 | default: |
| 1856 | /* is it in the S-mask? */ |
| 1857 | if (q->qh->hw_info2 & cpu_to_le32(1 << uframe)) |
| 1858 | usecs += q->qh->usecs; |
| 1859 | /* ... or C-mask? */ |
| 1860 | if (q->qh->hw_info2 & cpu_to_le32(1 << (8 + uframe))) |
| 1861 | usecs += q->qh->c_usecs; |
| 1862 | hw_p = &q->qh->hw_next; |
| 1863 | q = &q->qh->qh_next; |
| 1864 | break; |
| 1865 | } |
| 1866 | } |
| 1867 | #ifdef DEBUG |
| 1868 | if (usecs > 100) |
| 1869 | oxu_err(oxu, "uframe %d sched overrun: %d usecs\n", |
| 1870 | frame * 8 + uframe, usecs); |
| 1871 | #endif |
| 1872 | return usecs; |
| 1873 | } |
| 1874 | |
| 1875 | static int enable_periodic(struct oxu_hcd *oxu) |
| 1876 | { |
| 1877 | u32 cmd; |
| 1878 | int status; |
| 1879 | |
| 1880 | /* did clearing PSE did take effect yet? |
| 1881 | * takes effect only at frame boundaries... |
| 1882 | */ |
| 1883 | status = handshake(oxu, &oxu->regs->status, STS_PSS, 0, 9 * 125); |
| 1884 | if (status != 0) { |
| 1885 | oxu_to_hcd(oxu)->state = HC_STATE_HALT; |
Alan Stern | 69fff59 | 2011-05-17 17:27:12 -0400 | [diff] [blame] | 1886 | usb_hc_died(oxu_to_hcd(oxu)); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 1887 | return status; |
| 1888 | } |
| 1889 | |
| 1890 | cmd = readl(&oxu->regs->command) | CMD_PSE; |
| 1891 | writel(cmd, &oxu->regs->command); |
| 1892 | /* posted write ... PSS happens later */ |
| 1893 | oxu_to_hcd(oxu)->state = HC_STATE_RUNNING; |
| 1894 | |
| 1895 | /* make sure ehci_work scans these */ |
| 1896 | oxu->next_uframe = readl(&oxu->regs->frame_index) |
| 1897 | % (oxu->periodic_size << 3); |
| 1898 | return 0; |
| 1899 | } |
| 1900 | |
| 1901 | static int disable_periodic(struct oxu_hcd *oxu) |
| 1902 | { |
| 1903 | u32 cmd; |
| 1904 | int status; |
| 1905 | |
| 1906 | /* did setting PSE not take effect yet? |
| 1907 | * takes effect only at frame boundaries... |
| 1908 | */ |
| 1909 | status = handshake(oxu, &oxu->regs->status, STS_PSS, STS_PSS, 9 * 125); |
| 1910 | if (status != 0) { |
| 1911 | oxu_to_hcd(oxu)->state = HC_STATE_HALT; |
Alan Stern | 69fff59 | 2011-05-17 17:27:12 -0400 | [diff] [blame] | 1912 | usb_hc_died(oxu_to_hcd(oxu)); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 1913 | return status; |
| 1914 | } |
| 1915 | |
| 1916 | cmd = readl(&oxu->regs->command) & ~CMD_PSE; |
| 1917 | writel(cmd, &oxu->regs->command); |
| 1918 | /* posted write ... */ |
| 1919 | |
| 1920 | oxu->next_uframe = -1; |
| 1921 | return 0; |
| 1922 | } |
| 1923 | |
| 1924 | /* periodic schedule slots have iso tds (normal or split) first, then a |
| 1925 | * sparse tree for active interrupt transfers. |
| 1926 | * |
| 1927 | * this just links in a qh; caller guarantees uframe masks are set right. |
| 1928 | * no FSTN support (yet; oxu 0.96+) |
| 1929 | */ |
| 1930 | static int qh_link_periodic(struct oxu_hcd *oxu, struct ehci_qh *qh) |
| 1931 | { |
| 1932 | unsigned i; |
| 1933 | unsigned period = qh->period; |
| 1934 | |
| 1935 | dev_dbg(&qh->dev->dev, |
| 1936 | "link qh%d-%04x/%p start %d [%d/%d us]\n", |
| 1937 | period, le32_to_cpup(&qh->hw_info2) & (QH_CMASK | QH_SMASK), |
| 1938 | qh, qh->start, qh->usecs, qh->c_usecs); |
| 1939 | |
| 1940 | /* high bandwidth, or otherwise every microframe */ |
| 1941 | if (period == 0) |
| 1942 | period = 1; |
| 1943 | |
| 1944 | for (i = qh->start; i < oxu->periodic_size; i += period) { |
| 1945 | union ehci_shadow *prev = &oxu->pshadow[i]; |
| 1946 | __le32 *hw_p = &oxu->periodic[i]; |
| 1947 | union ehci_shadow here = *prev; |
| 1948 | __le32 type = 0; |
| 1949 | |
| 1950 | /* skip the iso nodes at list head */ |
| 1951 | while (here.ptr) { |
| 1952 | type = Q_NEXT_TYPE(*hw_p); |
| 1953 | if (type == Q_TYPE_QH) |
| 1954 | break; |
| 1955 | prev = periodic_next_shadow(prev, type); |
| 1956 | hw_p = &here.qh->hw_next; |
| 1957 | here = *prev; |
| 1958 | } |
| 1959 | |
| 1960 | /* sorting each branch by period (slow-->fast) |
| 1961 | * enables sharing interior tree nodes |
| 1962 | */ |
| 1963 | while (here.ptr && qh != here.qh) { |
| 1964 | if (qh->period > here.qh->period) |
| 1965 | break; |
| 1966 | prev = &here.qh->qh_next; |
| 1967 | hw_p = &here.qh->hw_next; |
| 1968 | here = *prev; |
| 1969 | } |
| 1970 | /* link in this qh, unless some earlier pass did that */ |
| 1971 | if (qh != here.qh) { |
| 1972 | qh->qh_next = here; |
| 1973 | if (here.qh) |
| 1974 | qh->hw_next = *hw_p; |
| 1975 | wmb(); |
| 1976 | prev->qh = qh; |
| 1977 | *hw_p = QH_NEXT(qh->qh_dma); |
| 1978 | } |
| 1979 | } |
| 1980 | qh->qh_state = QH_STATE_LINKED; |
| 1981 | qh_get(qh); |
| 1982 | |
| 1983 | /* update per-qh bandwidth for usbfs */ |
| 1984 | oxu_to_hcd(oxu)->self.bandwidth_allocated += qh->period |
| 1985 | ? ((qh->usecs + qh->c_usecs) / qh->period) |
| 1986 | : (qh->usecs * 8); |
| 1987 | |
| 1988 | /* maybe enable periodic schedule processing */ |
| 1989 | if (!oxu->periodic_sched++) |
| 1990 | return enable_periodic(oxu); |
| 1991 | |
| 1992 | return 0; |
| 1993 | } |
| 1994 | |
| 1995 | static void qh_unlink_periodic(struct oxu_hcd *oxu, struct ehci_qh *qh) |
| 1996 | { |
| 1997 | unsigned i; |
| 1998 | unsigned period; |
| 1999 | |
| 2000 | /* FIXME: |
| 2001 | * IF this isn't high speed |
| 2002 | * and this qh is active in the current uframe |
| 2003 | * (and overlay token SplitXstate is false?) |
| 2004 | * THEN |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 2005 | * qh->hw_info1 |= cpu_to_le32(1 << 7 "ignore"); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2006 | */ |
| 2007 | |
| 2008 | /* high bandwidth, or otherwise part of every microframe */ |
| 2009 | period = qh->period; |
| 2010 | if (period == 0) |
| 2011 | period = 1; |
| 2012 | |
| 2013 | for (i = qh->start; i < oxu->periodic_size; i += period) |
| 2014 | periodic_unlink(oxu, i, qh); |
| 2015 | |
| 2016 | /* update per-qh bandwidth for usbfs */ |
| 2017 | oxu_to_hcd(oxu)->self.bandwidth_allocated -= qh->period |
| 2018 | ? ((qh->usecs + qh->c_usecs) / qh->period) |
| 2019 | : (qh->usecs * 8); |
| 2020 | |
| 2021 | dev_dbg(&qh->dev->dev, |
| 2022 | "unlink qh%d-%04x/%p start %d [%d/%d us]\n", |
| 2023 | qh->period, |
| 2024 | le32_to_cpup(&qh->hw_info2) & (QH_CMASK | QH_SMASK), |
| 2025 | qh, qh->start, qh->usecs, qh->c_usecs); |
| 2026 | |
| 2027 | /* qh->qh_next still "live" to HC */ |
| 2028 | qh->qh_state = QH_STATE_UNLINK; |
| 2029 | qh->qh_next.ptr = NULL; |
| 2030 | qh_put(qh); |
| 2031 | |
| 2032 | /* maybe turn off periodic schedule */ |
| 2033 | oxu->periodic_sched--; |
| 2034 | if (!oxu->periodic_sched) |
| 2035 | (void) disable_periodic(oxu); |
| 2036 | } |
| 2037 | |
| 2038 | static void intr_deschedule(struct oxu_hcd *oxu, struct ehci_qh *qh) |
| 2039 | { |
| 2040 | unsigned wait; |
| 2041 | |
| 2042 | qh_unlink_periodic(oxu, qh); |
| 2043 | |
| 2044 | /* simple/paranoid: always delay, expecting the HC needs to read |
| 2045 | * qh->hw_next or finish a writeback after SPLIT/CSPLIT ... and |
| 2046 | * expect khubd to clean up after any CSPLITs we won't issue. |
| 2047 | * active high speed queues may need bigger delays... |
| 2048 | */ |
| 2049 | if (list_empty(&qh->qtd_list) |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 2050 | || (cpu_to_le32(QH_CMASK) & qh->hw_info2) != 0) |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2051 | wait = 2; |
| 2052 | else |
| 2053 | wait = 55; /* worst case: 3 * 1024 */ |
| 2054 | |
| 2055 | udelay(wait); |
| 2056 | qh->qh_state = QH_STATE_IDLE; |
| 2057 | qh->hw_next = EHCI_LIST_END; |
| 2058 | wmb(); |
| 2059 | } |
| 2060 | |
| 2061 | static int check_period(struct oxu_hcd *oxu, |
| 2062 | unsigned frame, unsigned uframe, |
| 2063 | unsigned period, unsigned usecs) |
| 2064 | { |
| 2065 | int claimed; |
| 2066 | |
| 2067 | /* complete split running into next frame? |
| 2068 | * given FSTN support, we could sometimes check... |
| 2069 | */ |
| 2070 | if (uframe >= 8) |
| 2071 | return 0; |
| 2072 | |
| 2073 | /* |
| 2074 | * 80% periodic == 100 usec/uframe available |
| 2075 | * convert "usecs we need" to "max already claimed" |
| 2076 | */ |
| 2077 | usecs = 100 - usecs; |
| 2078 | |
| 2079 | /* we "know" 2 and 4 uframe intervals were rejected; so |
| 2080 | * for period 0, check _every_ microframe in the schedule. |
| 2081 | */ |
| 2082 | if (unlikely(period == 0)) { |
| 2083 | do { |
| 2084 | for (uframe = 0; uframe < 7; uframe++) { |
| 2085 | claimed = periodic_usecs(oxu, frame, uframe); |
| 2086 | if (claimed > usecs) |
| 2087 | return 0; |
| 2088 | } |
| 2089 | } while ((frame += 1) < oxu->periodic_size); |
| 2090 | |
| 2091 | /* just check the specified uframe, at that period */ |
| 2092 | } else { |
| 2093 | do { |
| 2094 | claimed = periodic_usecs(oxu, frame, uframe); |
| 2095 | if (claimed > usecs) |
| 2096 | return 0; |
| 2097 | } while ((frame += period) < oxu->periodic_size); |
| 2098 | } |
| 2099 | |
| 2100 | return 1; |
| 2101 | } |
| 2102 | |
| 2103 | static int check_intr_schedule(struct oxu_hcd *oxu, |
| 2104 | unsigned frame, unsigned uframe, |
| 2105 | const struct ehci_qh *qh, __le32 *c_maskp) |
| 2106 | { |
| 2107 | int retval = -ENOSPC; |
| 2108 | |
| 2109 | if (qh->c_usecs && uframe >= 6) /* FSTN territory? */ |
| 2110 | goto done; |
| 2111 | |
| 2112 | if (!check_period(oxu, frame, uframe, qh->period, qh->usecs)) |
| 2113 | goto done; |
| 2114 | if (!qh->c_usecs) { |
| 2115 | retval = 0; |
| 2116 | *c_maskp = 0; |
| 2117 | goto done; |
| 2118 | } |
| 2119 | |
| 2120 | done: |
| 2121 | return retval; |
| 2122 | } |
| 2123 | |
| 2124 | /* "first fit" scheduling policy used the first time through, |
| 2125 | * or when the previous schedule slot can't be re-used. |
| 2126 | */ |
| 2127 | static int qh_schedule(struct oxu_hcd *oxu, struct ehci_qh *qh) |
| 2128 | { |
| 2129 | int status; |
| 2130 | unsigned uframe; |
| 2131 | __le32 c_mask; |
| 2132 | unsigned frame; /* 0..(qh->period - 1), or NO_FRAME */ |
| 2133 | |
| 2134 | qh_refresh(oxu, qh); |
| 2135 | qh->hw_next = EHCI_LIST_END; |
| 2136 | frame = qh->start; |
| 2137 | |
| 2138 | /* reuse the previous schedule slots, if we can */ |
| 2139 | if (frame < qh->period) { |
| 2140 | uframe = ffs(le32_to_cpup(&qh->hw_info2) & QH_SMASK); |
| 2141 | status = check_intr_schedule(oxu, frame, --uframe, |
| 2142 | qh, &c_mask); |
| 2143 | } else { |
| 2144 | uframe = 0; |
| 2145 | c_mask = 0; |
| 2146 | status = -ENOSPC; |
| 2147 | } |
| 2148 | |
| 2149 | /* else scan the schedule to find a group of slots such that all |
| 2150 | * uframes have enough periodic bandwidth available. |
| 2151 | */ |
| 2152 | if (status) { |
| 2153 | /* "normal" case, uframing flexible except with splits */ |
| 2154 | if (qh->period) { |
| 2155 | frame = qh->period - 1; |
| 2156 | do { |
| 2157 | for (uframe = 0; uframe < 8; uframe++) { |
| 2158 | status = check_intr_schedule(oxu, |
| 2159 | frame, uframe, qh, |
| 2160 | &c_mask); |
| 2161 | if (status == 0) |
| 2162 | break; |
| 2163 | } |
| 2164 | } while (status && frame--); |
| 2165 | |
| 2166 | /* qh->period == 0 means every uframe */ |
| 2167 | } else { |
| 2168 | frame = 0; |
| 2169 | status = check_intr_schedule(oxu, 0, 0, qh, &c_mask); |
| 2170 | } |
| 2171 | if (status) |
| 2172 | goto done; |
| 2173 | qh->start = frame; |
| 2174 | |
| 2175 | /* reset S-frame and (maybe) C-frame masks */ |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 2176 | qh->hw_info2 &= cpu_to_le32(~(QH_CMASK | QH_SMASK)); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2177 | qh->hw_info2 |= qh->period |
| 2178 | ? cpu_to_le32(1 << uframe) |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 2179 | : cpu_to_le32(QH_SMASK); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2180 | qh->hw_info2 |= c_mask; |
| 2181 | } else |
| 2182 | oxu_dbg(oxu, "reused qh %p schedule\n", qh); |
| 2183 | |
| 2184 | /* stuff into the periodic schedule */ |
| 2185 | status = qh_link_periodic(oxu, qh); |
| 2186 | done: |
| 2187 | return status; |
| 2188 | } |
| 2189 | |
| 2190 | static int intr_submit(struct oxu_hcd *oxu, struct urb *urb, |
| 2191 | struct list_head *qtd_list, gfp_t mem_flags) |
| 2192 | { |
| 2193 | unsigned epnum; |
| 2194 | unsigned long flags; |
| 2195 | struct ehci_qh *qh; |
| 2196 | int status = 0; |
| 2197 | struct list_head empty; |
| 2198 | |
| 2199 | /* get endpoint and transfer/schedule data */ |
| 2200 | epnum = urb->ep->desc.bEndpointAddress; |
| 2201 | |
| 2202 | spin_lock_irqsave(&oxu->lock, flags); |
| 2203 | |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 2204 | if (unlikely(!HCD_HW_ACCESSIBLE(oxu_to_hcd(oxu)))) { |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2205 | status = -ESHUTDOWN; |
| 2206 | goto done; |
| 2207 | } |
| 2208 | |
| 2209 | /* get qh and force any scheduling errors */ |
| 2210 | INIT_LIST_HEAD(&empty); |
| 2211 | qh = qh_append_tds(oxu, urb, &empty, epnum, &urb->ep->hcpriv); |
| 2212 | if (qh == NULL) { |
| 2213 | status = -ENOMEM; |
| 2214 | goto done; |
| 2215 | } |
| 2216 | if (qh->qh_state == QH_STATE_IDLE) { |
| 2217 | status = qh_schedule(oxu, qh); |
| 2218 | if (status != 0) |
| 2219 | goto done; |
| 2220 | } |
| 2221 | |
| 2222 | /* then queue the urb's tds to the qh */ |
| 2223 | qh = qh_append_tds(oxu, urb, qtd_list, epnum, &urb->ep->hcpriv); |
| 2224 | BUG_ON(qh == NULL); |
| 2225 | |
| 2226 | /* ... update usbfs periodic stats */ |
| 2227 | oxu_to_hcd(oxu)->self.bandwidth_int_reqs++; |
| 2228 | |
| 2229 | done: |
| 2230 | spin_unlock_irqrestore(&oxu->lock, flags); |
| 2231 | if (status) |
| 2232 | qtd_list_free(oxu, urb, qtd_list); |
| 2233 | |
| 2234 | return status; |
| 2235 | } |
| 2236 | |
| 2237 | static inline int itd_submit(struct oxu_hcd *oxu, struct urb *urb, |
| 2238 | gfp_t mem_flags) |
| 2239 | { |
| 2240 | oxu_dbg(oxu, "iso support is missing!\n"); |
| 2241 | return -ENOSYS; |
| 2242 | } |
| 2243 | |
| 2244 | static inline int sitd_submit(struct oxu_hcd *oxu, struct urb *urb, |
| 2245 | gfp_t mem_flags) |
| 2246 | { |
| 2247 | oxu_dbg(oxu, "split iso support is missing!\n"); |
| 2248 | return -ENOSYS; |
| 2249 | } |
| 2250 | |
| 2251 | static void scan_periodic(struct oxu_hcd *oxu) |
| 2252 | { |
| 2253 | unsigned frame, clock, now_uframe, mod; |
| 2254 | unsigned modified; |
| 2255 | |
| 2256 | mod = oxu->periodic_size << 3; |
| 2257 | |
| 2258 | /* |
| 2259 | * When running, scan from last scan point up to "now" |
| 2260 | * else clean up by scanning everything that's left. |
| 2261 | * Touches as few pages as possible: cache-friendly. |
| 2262 | */ |
| 2263 | now_uframe = oxu->next_uframe; |
| 2264 | if (HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) |
| 2265 | clock = readl(&oxu->regs->frame_index); |
| 2266 | else |
| 2267 | clock = now_uframe + mod - 1; |
| 2268 | clock %= mod; |
| 2269 | |
| 2270 | for (;;) { |
| 2271 | union ehci_shadow q, *q_p; |
| 2272 | __le32 type, *hw_p; |
| 2273 | unsigned uframes; |
| 2274 | |
| 2275 | /* don't scan past the live uframe */ |
| 2276 | frame = now_uframe >> 3; |
| 2277 | if (frame == (clock >> 3)) |
| 2278 | uframes = now_uframe & 0x07; |
| 2279 | else { |
| 2280 | /* safe to scan the whole frame at once */ |
| 2281 | now_uframe |= 0x07; |
| 2282 | uframes = 8; |
| 2283 | } |
| 2284 | |
| 2285 | restart: |
| 2286 | /* scan each element in frame's queue for completions */ |
| 2287 | q_p = &oxu->pshadow[frame]; |
| 2288 | hw_p = &oxu->periodic[frame]; |
| 2289 | q.ptr = q_p->ptr; |
| 2290 | type = Q_NEXT_TYPE(*hw_p); |
| 2291 | modified = 0; |
| 2292 | |
| 2293 | while (q.ptr != NULL) { |
| 2294 | union ehci_shadow temp; |
| 2295 | int live; |
| 2296 | |
| 2297 | live = HC_IS_RUNNING(oxu_to_hcd(oxu)->state); |
| 2298 | switch (type) { |
| 2299 | case Q_TYPE_QH: |
| 2300 | /* handle any completions */ |
| 2301 | temp.qh = qh_get(q.qh); |
| 2302 | type = Q_NEXT_TYPE(q.qh->hw_next); |
| 2303 | q = q.qh->qh_next; |
| 2304 | modified = qh_completions(oxu, temp.qh); |
| 2305 | if (unlikely(list_empty(&temp.qh->qtd_list))) |
| 2306 | intr_deschedule(oxu, temp.qh); |
| 2307 | qh_put(temp.qh); |
| 2308 | break; |
| 2309 | default: |
Greg Kroah-Hartman | b5f5bfe | 2012-05-01 21:33:43 -0700 | [diff] [blame] | 2310 | oxu_dbg(oxu, "corrupt type %d frame %d shadow %p\n", |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2311 | type, frame, q.ptr); |
| 2312 | q.ptr = NULL; |
| 2313 | } |
| 2314 | |
| 2315 | /* assume completion callbacks modify the queue */ |
| 2316 | if (unlikely(modified)) |
| 2317 | goto restart; |
| 2318 | } |
| 2319 | |
| 2320 | /* Stop when we catch up to the HC */ |
| 2321 | |
| 2322 | /* FIXME: this assumes we won't get lapped when |
| 2323 | * latencies climb; that should be rare, but... |
| 2324 | * detect it, and just go all the way around. |
| 2325 | * FLR might help detect this case, so long as latencies |
| 2326 | * don't exceed periodic_size msec (default 1.024 sec). |
| 2327 | */ |
| 2328 | |
| 2329 | /* FIXME: likewise assumes HC doesn't halt mid-scan */ |
| 2330 | |
| 2331 | if (now_uframe == clock) { |
| 2332 | unsigned now; |
| 2333 | |
| 2334 | if (!HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) |
| 2335 | break; |
| 2336 | oxu->next_uframe = now_uframe; |
| 2337 | now = readl(&oxu->regs->frame_index) % mod; |
| 2338 | if (now_uframe == now) |
| 2339 | break; |
| 2340 | |
| 2341 | /* rescan the rest of this frame, then ... */ |
| 2342 | clock = now; |
| 2343 | } else { |
| 2344 | now_uframe++; |
| 2345 | now_uframe %= mod; |
| 2346 | } |
| 2347 | } |
| 2348 | } |
| 2349 | |
| 2350 | /* On some systems, leaving remote wakeup enabled prevents system shutdown. |
| 2351 | * The firmware seems to think that powering off is a wakeup event! |
| 2352 | * This routine turns off remote wakeup and everything else, on all ports. |
| 2353 | */ |
| 2354 | static void ehci_turn_off_all_ports(struct oxu_hcd *oxu) |
| 2355 | { |
| 2356 | int port = HCS_N_PORTS(oxu->hcs_params); |
| 2357 | |
| 2358 | while (port--) |
| 2359 | writel(PORT_RWC_BITS, &oxu->regs->port_status[port]); |
| 2360 | } |
| 2361 | |
| 2362 | static void ehci_port_power(struct oxu_hcd *oxu, int is_on) |
| 2363 | { |
| 2364 | unsigned port; |
| 2365 | |
| 2366 | if (!HCS_PPC(oxu->hcs_params)) |
| 2367 | return; |
| 2368 | |
| 2369 | oxu_dbg(oxu, "...power%s ports...\n", is_on ? "up" : "down"); |
| 2370 | for (port = HCS_N_PORTS(oxu->hcs_params); port > 0; ) |
| 2371 | (void) oxu_hub_control(oxu_to_hcd(oxu), |
| 2372 | is_on ? SetPortFeature : ClearPortFeature, |
| 2373 | USB_PORT_FEAT_POWER, |
| 2374 | port--, NULL, 0); |
| 2375 | msleep(20); |
| 2376 | } |
| 2377 | |
| 2378 | /* Called from some interrupts, timers, and so on. |
| 2379 | * It calls driver completion functions, after dropping oxu->lock. |
| 2380 | */ |
| 2381 | static void ehci_work(struct oxu_hcd *oxu) |
| 2382 | { |
| 2383 | timer_action_done(oxu, TIMER_IO_WATCHDOG); |
| 2384 | if (oxu->reclaim_ready) |
| 2385 | end_unlink_async(oxu); |
| 2386 | |
| 2387 | /* another CPU may drop oxu->lock during a schedule scan while |
| 2388 | * it reports urb completions. this flag guards against bogus |
| 2389 | * attempts at re-entrant schedule scanning. |
| 2390 | */ |
| 2391 | if (oxu->scanning) |
| 2392 | return; |
| 2393 | oxu->scanning = 1; |
| 2394 | scan_async(oxu); |
| 2395 | if (oxu->next_uframe != -1) |
| 2396 | scan_periodic(oxu); |
| 2397 | oxu->scanning = 0; |
| 2398 | |
| 2399 | /* the IO watchdog guards against hardware or driver bugs that |
| 2400 | * misplace IRQs, and should let us run completely without IRQs. |
| 2401 | * such lossage has been observed on both VT6202 and VT8235. |
| 2402 | */ |
| 2403 | if (HC_IS_RUNNING(oxu_to_hcd(oxu)->state) && |
| 2404 | (oxu->async->qh_next.ptr != NULL || |
| 2405 | oxu->periodic_sched != 0)) |
| 2406 | timer_action(oxu, TIMER_IO_WATCHDOG); |
| 2407 | } |
| 2408 | |
| 2409 | static void unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh) |
| 2410 | { |
| 2411 | /* if we need to use IAA and it's busy, defer */ |
| 2412 | if (qh->qh_state == QH_STATE_LINKED |
| 2413 | && oxu->reclaim |
| 2414 | && HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) { |
| 2415 | struct ehci_qh *last; |
| 2416 | |
| 2417 | for (last = oxu->reclaim; |
| 2418 | last->reclaim; |
| 2419 | last = last->reclaim) |
| 2420 | continue; |
| 2421 | qh->qh_state = QH_STATE_UNLINK_WAIT; |
| 2422 | last->reclaim = qh; |
| 2423 | |
| 2424 | /* bypass IAA if the hc can't care */ |
| 2425 | } else if (!HC_IS_RUNNING(oxu_to_hcd(oxu)->state) && oxu->reclaim) |
| 2426 | end_unlink_async(oxu); |
| 2427 | |
| 2428 | /* something else might have unlinked the qh by now */ |
| 2429 | if (qh->qh_state == QH_STATE_LINKED) |
| 2430 | start_unlink_async(oxu, qh); |
| 2431 | } |
| 2432 | |
| 2433 | /* |
| 2434 | * USB host controller methods |
| 2435 | */ |
| 2436 | |
| 2437 | static irqreturn_t oxu210_hcd_irq(struct usb_hcd *hcd) |
| 2438 | { |
| 2439 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 2440 | u32 status, pcd_status = 0; |
| 2441 | int bh; |
| 2442 | |
| 2443 | spin_lock(&oxu->lock); |
| 2444 | |
| 2445 | status = readl(&oxu->regs->status); |
| 2446 | |
| 2447 | /* e.g. cardbus physical eject */ |
| 2448 | if (status == ~(u32) 0) { |
| 2449 | oxu_dbg(oxu, "device removed\n"); |
| 2450 | goto dead; |
| 2451 | } |
| 2452 | |
Alan Stern | 69fff59 | 2011-05-17 17:27:12 -0400 | [diff] [blame] | 2453 | /* Shared IRQ? */ |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2454 | status &= INTR_MASK; |
Alan Stern | 69fff59 | 2011-05-17 17:27:12 -0400 | [diff] [blame] | 2455 | if (!status || unlikely(hcd->state == HC_STATE_HALT)) { |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2456 | spin_unlock(&oxu->lock); |
| 2457 | return IRQ_NONE; |
| 2458 | } |
| 2459 | |
| 2460 | /* clear (just) interrupts */ |
| 2461 | writel(status, &oxu->regs->status); |
| 2462 | readl(&oxu->regs->command); /* unblock posted write */ |
| 2463 | bh = 0; |
| 2464 | |
| 2465 | #ifdef OXU_VERBOSE_DEBUG |
| 2466 | /* unrequested/ignored: Frame List Rollover */ |
| 2467 | dbg_status(oxu, "irq", status); |
| 2468 | #endif |
| 2469 | |
| 2470 | /* INT, ERR, and IAA interrupt rates can be throttled */ |
| 2471 | |
| 2472 | /* normal [4.15.1.2] or error [4.15.1.1] completion */ |
| 2473 | if (likely((status & (STS_INT|STS_ERR)) != 0)) |
| 2474 | bh = 1; |
| 2475 | |
| 2476 | /* complete the unlinking of some qh [4.15.2.3] */ |
| 2477 | if (status & STS_IAA) { |
| 2478 | oxu->reclaim_ready = 1; |
| 2479 | bh = 1; |
| 2480 | } |
| 2481 | |
| 2482 | /* remote wakeup [4.3.1] */ |
| 2483 | if (status & STS_PCD) { |
| 2484 | unsigned i = HCS_N_PORTS(oxu->hcs_params); |
| 2485 | pcd_status = status; |
| 2486 | |
| 2487 | /* resume root hub? */ |
| 2488 | if (!(readl(&oxu->regs->command) & CMD_RUN)) |
| 2489 | usb_hcd_resume_root_hub(hcd); |
| 2490 | |
| 2491 | while (i--) { |
| 2492 | int pstatus = readl(&oxu->regs->port_status[i]); |
| 2493 | |
| 2494 | if (pstatus & PORT_OWNER) |
| 2495 | continue; |
| 2496 | if (!(pstatus & PORT_RESUME) |
| 2497 | || oxu->reset_done[i] != 0) |
| 2498 | continue; |
| 2499 | |
| 2500 | /* start 20 msec resume signaling from this port, |
| 2501 | * and make khubd collect PORT_STAT_C_SUSPEND to |
| 2502 | * stop that signaling. |
| 2503 | */ |
| 2504 | oxu->reset_done[i] = jiffies + msecs_to_jiffies(20); |
| 2505 | oxu_dbg(oxu, "port %d remote wakeup\n", i + 1); |
| 2506 | mod_timer(&hcd->rh_timer, oxu->reset_done[i]); |
| 2507 | } |
| 2508 | } |
| 2509 | |
| 2510 | /* PCI errors [4.15.2.4] */ |
| 2511 | if (unlikely((status & STS_FATAL) != 0)) { |
| 2512 | /* bogus "fatal" IRQs appear on some chips... why? */ |
| 2513 | status = readl(&oxu->regs->status); |
| 2514 | dbg_cmd(oxu, "fatal", readl(&oxu->regs->command)); |
| 2515 | dbg_status(oxu, "fatal", status); |
| 2516 | if (status & STS_HALT) { |
| 2517 | oxu_err(oxu, "fatal error\n"); |
| 2518 | dead: |
| 2519 | ehci_reset(oxu); |
| 2520 | writel(0, &oxu->regs->configured_flag); |
Alan Stern | 69fff59 | 2011-05-17 17:27:12 -0400 | [diff] [blame] | 2521 | usb_hc_died(hcd); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2522 | /* generic layer kills/unlinks all urbs, then |
| 2523 | * uses oxu_stop to clean up the rest |
| 2524 | */ |
| 2525 | bh = 1; |
| 2526 | } |
| 2527 | } |
| 2528 | |
| 2529 | if (bh) |
| 2530 | ehci_work(oxu); |
| 2531 | spin_unlock(&oxu->lock); |
| 2532 | if (pcd_status & STS_PCD) |
| 2533 | usb_hcd_poll_rh_status(hcd); |
| 2534 | return IRQ_HANDLED; |
| 2535 | } |
| 2536 | |
| 2537 | static irqreturn_t oxu_irq(struct usb_hcd *hcd) |
| 2538 | { |
| 2539 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 2540 | int ret = IRQ_HANDLED; |
| 2541 | |
| 2542 | u32 status = oxu_readl(hcd->regs, OXU_CHIPIRQSTATUS); |
| 2543 | u32 enable = oxu_readl(hcd->regs, OXU_CHIPIRQEN_SET); |
| 2544 | |
| 2545 | /* Disable all interrupt */ |
| 2546 | oxu_writel(hcd->regs, OXU_CHIPIRQEN_CLR, enable); |
| 2547 | |
| 2548 | if ((oxu->is_otg && (status & OXU_USBOTGI)) || |
| 2549 | (!oxu->is_otg && (status & OXU_USBSPHI))) |
| 2550 | oxu210_hcd_irq(hcd); |
| 2551 | else |
| 2552 | ret = IRQ_NONE; |
| 2553 | |
| 2554 | /* Enable all interrupt back */ |
| 2555 | oxu_writel(hcd->regs, OXU_CHIPIRQEN_SET, enable); |
| 2556 | |
| 2557 | return ret; |
| 2558 | } |
| 2559 | |
| 2560 | static void oxu_watchdog(unsigned long param) |
| 2561 | { |
| 2562 | struct oxu_hcd *oxu = (struct oxu_hcd *) param; |
| 2563 | unsigned long flags; |
| 2564 | |
| 2565 | spin_lock_irqsave(&oxu->lock, flags); |
| 2566 | |
| 2567 | /* lost IAA irqs wedge things badly; seen with a vt8235 */ |
| 2568 | if (oxu->reclaim) { |
| 2569 | u32 status = readl(&oxu->regs->status); |
| 2570 | if (status & STS_IAA) { |
| 2571 | oxu_vdbg(oxu, "lost IAA\n"); |
| 2572 | writel(STS_IAA, &oxu->regs->status); |
| 2573 | oxu->reclaim_ready = 1; |
| 2574 | } |
| 2575 | } |
| 2576 | |
| 2577 | /* stop async processing after it's idled a bit */ |
| 2578 | if (test_bit(TIMER_ASYNC_OFF, &oxu->actions)) |
| 2579 | start_unlink_async(oxu, oxu->async); |
| 2580 | |
| 2581 | /* oxu could run by timer, without IRQs ... */ |
| 2582 | ehci_work(oxu); |
| 2583 | |
| 2584 | spin_unlock_irqrestore(&oxu->lock, flags); |
| 2585 | } |
| 2586 | |
| 2587 | /* One-time init, only for memory state. |
| 2588 | */ |
| 2589 | static int oxu_hcd_init(struct usb_hcd *hcd) |
| 2590 | { |
| 2591 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 2592 | u32 temp; |
| 2593 | int retval; |
| 2594 | u32 hcc_params; |
| 2595 | |
| 2596 | spin_lock_init(&oxu->lock); |
| 2597 | |
| 2598 | init_timer(&oxu->watchdog); |
| 2599 | oxu->watchdog.function = oxu_watchdog; |
| 2600 | oxu->watchdog.data = (unsigned long) oxu; |
| 2601 | |
| 2602 | /* |
| 2603 | * hw default: 1K periodic list heads, one per frame. |
| 2604 | * periodic_size can shrink by USBCMD update if hcc_params allows. |
| 2605 | */ |
| 2606 | oxu->periodic_size = DEFAULT_I_TDPS; |
| 2607 | retval = ehci_mem_init(oxu, GFP_KERNEL); |
| 2608 | if (retval < 0) |
| 2609 | return retval; |
| 2610 | |
| 2611 | /* controllers may cache some of the periodic schedule ... */ |
| 2612 | hcc_params = readl(&oxu->caps->hcc_params); |
| 2613 | if (HCC_ISOC_CACHE(hcc_params)) /* full frame cache */ |
| 2614 | oxu->i_thresh = 8; |
| 2615 | else /* N microframes cached */ |
| 2616 | oxu->i_thresh = 2 + HCC_ISOC_THRES(hcc_params); |
| 2617 | |
| 2618 | oxu->reclaim = NULL; |
| 2619 | oxu->reclaim_ready = 0; |
| 2620 | oxu->next_uframe = -1; |
| 2621 | |
| 2622 | /* |
| 2623 | * dedicate a qh for the async ring head, since we couldn't unlink |
| 2624 | * a 'real' qh without stopping the async schedule [4.8]. use it |
| 2625 | * as the 'reclamation list head' too. |
| 2626 | * its dummy is used in hw_alt_next of many tds, to prevent the qh |
| 2627 | * from automatically advancing to the next td after short reads. |
| 2628 | */ |
| 2629 | oxu->async->qh_next.qh = NULL; |
| 2630 | oxu->async->hw_next = QH_NEXT(oxu->async->qh_dma); |
| 2631 | oxu->async->hw_info1 = cpu_to_le32(QH_HEAD); |
| 2632 | oxu->async->hw_token = cpu_to_le32(QTD_STS_HALT); |
| 2633 | oxu->async->hw_qtd_next = EHCI_LIST_END; |
| 2634 | oxu->async->qh_state = QH_STATE_LINKED; |
| 2635 | oxu->async->hw_alt_next = QTD_NEXT(oxu->async->dummy->qtd_dma); |
| 2636 | |
| 2637 | /* clear interrupt enables, set irq latency */ |
| 2638 | if (log2_irq_thresh < 0 || log2_irq_thresh > 6) |
| 2639 | log2_irq_thresh = 0; |
| 2640 | temp = 1 << (16 + log2_irq_thresh); |
| 2641 | if (HCC_CANPARK(hcc_params)) { |
| 2642 | /* HW default park == 3, on hardware that supports it (like |
| 2643 | * NVidia and ALI silicon), maximizes throughput on the async |
| 2644 | * schedule by avoiding QH fetches between transfers. |
| 2645 | * |
| 2646 | * With fast usb storage devices and NForce2, "park" seems to |
| 2647 | * make problems: throughput reduction (!), data errors... |
| 2648 | */ |
| 2649 | if (park) { |
| 2650 | park = min(park, (unsigned) 3); |
| 2651 | temp |= CMD_PARK; |
| 2652 | temp |= park << 8; |
| 2653 | } |
| 2654 | oxu_dbg(oxu, "park %d\n", park); |
| 2655 | } |
| 2656 | if (HCC_PGM_FRAMELISTLEN(hcc_params)) { |
| 2657 | /* periodic schedule size can be smaller than default */ |
| 2658 | temp &= ~(3 << 2); |
| 2659 | temp |= (EHCI_TUNE_FLS << 2); |
| 2660 | } |
| 2661 | oxu->command = temp; |
| 2662 | |
| 2663 | return 0; |
| 2664 | } |
| 2665 | |
| 2666 | /* Called during probe() after chip reset completes. |
| 2667 | */ |
| 2668 | static int oxu_reset(struct usb_hcd *hcd) |
| 2669 | { |
| 2670 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 2671 | int ret; |
| 2672 | |
| 2673 | spin_lock_init(&oxu->mem_lock); |
| 2674 | INIT_LIST_HEAD(&oxu->urb_list); |
| 2675 | oxu->urb_len = 0; |
| 2676 | |
| 2677 | /* FIMXE */ |
Hannes Eder | a9f8ec4 | 2009-02-27 02:04:31 +0100 | [diff] [blame] | 2678 | hcd->self.controller->dma_mask = NULL; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2679 | |
| 2680 | if (oxu->is_otg) { |
| 2681 | oxu->caps = hcd->regs + OXU_OTG_CAP_OFFSET; |
| 2682 | oxu->regs = hcd->regs + OXU_OTG_CAP_OFFSET + \ |
| 2683 | HC_LENGTH(readl(&oxu->caps->hc_capbase)); |
| 2684 | |
| 2685 | oxu->mem = hcd->regs + OXU_SPH_MEM; |
| 2686 | } else { |
| 2687 | oxu->caps = hcd->regs + OXU_SPH_CAP_OFFSET; |
| 2688 | oxu->regs = hcd->regs + OXU_SPH_CAP_OFFSET + \ |
| 2689 | HC_LENGTH(readl(&oxu->caps->hc_capbase)); |
| 2690 | |
| 2691 | oxu->mem = hcd->regs + OXU_OTG_MEM; |
| 2692 | } |
| 2693 | |
| 2694 | oxu->hcs_params = readl(&oxu->caps->hcs_params); |
| 2695 | oxu->sbrn = 0x20; |
| 2696 | |
| 2697 | ret = oxu_hcd_init(hcd); |
| 2698 | if (ret) |
| 2699 | return ret; |
| 2700 | |
| 2701 | return 0; |
| 2702 | } |
| 2703 | |
| 2704 | static int oxu_run(struct usb_hcd *hcd) |
| 2705 | { |
| 2706 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 2707 | int retval; |
| 2708 | u32 temp, hcc_params; |
| 2709 | |
| 2710 | hcd->uses_new_polling = 1; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2711 | |
| 2712 | /* EHCI spec section 4.1 */ |
| 2713 | retval = ehci_reset(oxu); |
| 2714 | if (retval != 0) { |
| 2715 | ehci_mem_cleanup(oxu); |
| 2716 | return retval; |
| 2717 | } |
| 2718 | writel(oxu->periodic_dma, &oxu->regs->frame_list); |
| 2719 | writel((u32) oxu->async->qh_dma, &oxu->regs->async_next); |
| 2720 | |
| 2721 | /* hcc_params controls whether oxu->regs->segment must (!!!) |
| 2722 | * be used; it constrains QH/ITD/SITD and QTD locations. |
| 2723 | * pci_pool consistent memory always uses segment zero. |
| 2724 | * streaming mappings for I/O buffers, like pci_map_single(), |
| 2725 | * can return segments above 4GB, if the device allows. |
| 2726 | * |
| 2727 | * NOTE: the dma mask is visible through dma_supported(), so |
| 2728 | * drivers can pass this info along ... like NETIF_F_HIGHDMA, |
| 2729 | * Scsi_Host.highmem_io, and so forth. It's readonly to all |
| 2730 | * host side drivers though. |
| 2731 | */ |
| 2732 | hcc_params = readl(&oxu->caps->hcc_params); |
| 2733 | if (HCC_64BIT_ADDR(hcc_params)) |
| 2734 | writel(0, &oxu->regs->segment); |
| 2735 | |
| 2736 | oxu->command &= ~(CMD_LRESET | CMD_IAAD | CMD_PSE | |
| 2737 | CMD_ASE | CMD_RESET); |
| 2738 | oxu->command |= CMD_RUN; |
| 2739 | writel(oxu->command, &oxu->regs->command); |
| 2740 | dbg_cmd(oxu, "init", oxu->command); |
| 2741 | |
| 2742 | /* |
| 2743 | * Start, enabling full USB 2.0 functionality ... usb 1.1 devices |
| 2744 | * are explicitly handed to companion controller(s), so no TT is |
| 2745 | * involved with the root hub. (Except where one is integrated, |
| 2746 | * and there's no companion controller unless maybe for USB OTG.) |
| 2747 | */ |
| 2748 | hcd->state = HC_STATE_RUNNING; |
| 2749 | writel(FLAG_CF, &oxu->regs->configured_flag); |
| 2750 | readl(&oxu->regs->command); /* unblock posted writes */ |
| 2751 | |
| 2752 | temp = HC_VERSION(readl(&oxu->caps->hc_capbase)); |
| 2753 | oxu_info(oxu, "USB %x.%x started, quasi-EHCI %x.%02x, driver %s%s\n", |
| 2754 | ((oxu->sbrn & 0xf0)>>4), (oxu->sbrn & 0x0f), |
| 2755 | temp >> 8, temp & 0xff, DRIVER_VERSION, |
| 2756 | ignore_oc ? ", overcurrent ignored" : ""); |
| 2757 | |
| 2758 | writel(INTR_MASK, &oxu->regs->intr_enable); /* Turn On Interrupts */ |
| 2759 | |
| 2760 | return 0; |
| 2761 | } |
| 2762 | |
| 2763 | static void oxu_stop(struct usb_hcd *hcd) |
| 2764 | { |
| 2765 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 2766 | |
| 2767 | /* Turn off port power on all root hub ports. */ |
| 2768 | ehci_port_power(oxu, 0); |
| 2769 | |
| 2770 | /* no more interrupts ... */ |
| 2771 | del_timer_sync(&oxu->watchdog); |
| 2772 | |
| 2773 | spin_lock_irq(&oxu->lock); |
| 2774 | if (HC_IS_RUNNING(hcd->state)) |
| 2775 | ehci_quiesce(oxu); |
| 2776 | |
| 2777 | ehci_reset(oxu); |
| 2778 | writel(0, &oxu->regs->intr_enable); |
| 2779 | spin_unlock_irq(&oxu->lock); |
| 2780 | |
| 2781 | /* let companion controllers work when we aren't */ |
| 2782 | writel(0, &oxu->regs->configured_flag); |
| 2783 | |
| 2784 | /* root hub is shut down separately (first, when possible) */ |
| 2785 | spin_lock_irq(&oxu->lock); |
| 2786 | if (oxu->async) |
| 2787 | ehci_work(oxu); |
| 2788 | spin_unlock_irq(&oxu->lock); |
| 2789 | ehci_mem_cleanup(oxu); |
| 2790 | |
| 2791 | dbg_status(oxu, "oxu_stop completed", readl(&oxu->regs->status)); |
| 2792 | } |
| 2793 | |
| 2794 | /* Kick in for silicon on any bus (not just pci, etc). |
| 2795 | * This forcibly disables dma and IRQs, helping kexec and other cases |
| 2796 | * where the next system software may expect clean state. |
| 2797 | */ |
| 2798 | static void oxu_shutdown(struct usb_hcd *hcd) |
| 2799 | { |
| 2800 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 2801 | |
| 2802 | (void) ehci_halt(oxu); |
| 2803 | ehci_turn_off_all_ports(oxu); |
| 2804 | |
| 2805 | /* make BIOS/etc use companion controller during reboot */ |
| 2806 | writel(0, &oxu->regs->configured_flag); |
| 2807 | |
| 2808 | /* unblock posted writes */ |
| 2809 | readl(&oxu->regs->configured_flag); |
| 2810 | } |
| 2811 | |
| 2812 | /* Non-error returns are a promise to giveback() the urb later |
| 2813 | * we drop ownership so next owner (or urb unlink) can get it |
| 2814 | * |
| 2815 | * urb + dev is in hcd.self.controller.urb_list |
| 2816 | * we're queueing TDs onto software and hardware lists |
| 2817 | * |
| 2818 | * hcd-specific init for hcpriv hasn't been done yet |
| 2819 | * |
| 2820 | * NOTE: control, bulk, and interrupt share the same code to append TDs |
| 2821 | * to a (possibly active) QH, and the same QH scanning code. |
| 2822 | */ |
| 2823 | static int __oxu_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| 2824 | gfp_t mem_flags) |
| 2825 | { |
| 2826 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 2827 | struct list_head qtd_list; |
| 2828 | |
| 2829 | INIT_LIST_HEAD(&qtd_list); |
| 2830 | |
| 2831 | switch (usb_pipetype(urb->pipe)) { |
| 2832 | case PIPE_CONTROL: |
| 2833 | case PIPE_BULK: |
| 2834 | default: |
| 2835 | if (!qh_urb_transaction(oxu, urb, &qtd_list, mem_flags)) |
| 2836 | return -ENOMEM; |
| 2837 | return submit_async(oxu, urb, &qtd_list, mem_flags); |
| 2838 | |
| 2839 | case PIPE_INTERRUPT: |
| 2840 | if (!qh_urb_transaction(oxu, urb, &qtd_list, mem_flags)) |
| 2841 | return -ENOMEM; |
| 2842 | return intr_submit(oxu, urb, &qtd_list, mem_flags); |
| 2843 | |
| 2844 | case PIPE_ISOCHRONOUS: |
| 2845 | if (urb->dev->speed == USB_SPEED_HIGH) |
| 2846 | return itd_submit(oxu, urb, mem_flags); |
| 2847 | else |
| 2848 | return sitd_submit(oxu, urb, mem_flags); |
| 2849 | } |
| 2850 | } |
| 2851 | |
| 2852 | /* This function is responsible for breaking URBs with big data size |
| 2853 | * into smaller size and processing small urbs in sequence. |
| 2854 | */ |
| 2855 | static int oxu_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| 2856 | gfp_t mem_flags) |
| 2857 | { |
| 2858 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 2859 | int num, rem; |
| 2860 | int transfer_buffer_length; |
| 2861 | void *transfer_buffer; |
| 2862 | struct urb *murb; |
| 2863 | int i, ret; |
| 2864 | |
| 2865 | /* If not bulk pipe just enqueue the URB */ |
| 2866 | if (!usb_pipebulk(urb->pipe)) |
| 2867 | return __oxu_urb_enqueue(hcd, urb, mem_flags); |
| 2868 | |
| 2869 | /* Otherwise we should verify the USB transfer buffer size! */ |
| 2870 | transfer_buffer = urb->transfer_buffer; |
| 2871 | transfer_buffer_length = urb->transfer_buffer_length; |
| 2872 | |
| 2873 | num = urb->transfer_buffer_length / 4096; |
| 2874 | rem = urb->transfer_buffer_length % 4096; |
| 2875 | if (rem != 0) |
| 2876 | num++; |
| 2877 | |
| 2878 | /* If URB is smaller than 4096 bytes just enqueue it! */ |
| 2879 | if (num == 1) |
| 2880 | return __oxu_urb_enqueue(hcd, urb, mem_flags); |
| 2881 | |
| 2882 | /* Ok, we have more job to do! :) */ |
| 2883 | |
| 2884 | for (i = 0; i < num - 1; i++) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2885 | /* Get free micro URB poll till a free urb is received */ |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2886 | |
| 2887 | do { |
| 2888 | murb = (struct urb *) oxu_murb_alloc(oxu); |
| 2889 | if (!murb) |
| 2890 | schedule(); |
| 2891 | } while (!murb); |
| 2892 | |
| 2893 | /* Coping the urb */ |
| 2894 | memcpy(murb, urb, sizeof(struct urb)); |
| 2895 | |
| 2896 | murb->transfer_buffer_length = 4096; |
| 2897 | murb->transfer_buffer = transfer_buffer + i * 4096; |
| 2898 | |
| 2899 | /* Null pointer for the encodes that this is a micro urb */ |
| 2900 | murb->complete = NULL; |
| 2901 | |
| 2902 | ((struct oxu_murb *) murb)->main = urb; |
| 2903 | ((struct oxu_murb *) murb)->last = 0; |
| 2904 | |
| 2905 | /* This loop is to guarantee urb to be processed when there's |
| 2906 | * not enough resources at a particular time by retrying. |
| 2907 | */ |
| 2908 | do { |
| 2909 | ret = __oxu_urb_enqueue(hcd, murb, mem_flags); |
| 2910 | if (ret) |
| 2911 | schedule(); |
| 2912 | } while (ret); |
| 2913 | } |
| 2914 | |
| 2915 | /* Last urb requires special handling */ |
| 2916 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2917 | /* Get free micro URB poll till a free urb is received */ |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2918 | do { |
| 2919 | murb = (struct urb *) oxu_murb_alloc(oxu); |
| 2920 | if (!murb) |
| 2921 | schedule(); |
| 2922 | } while (!murb); |
| 2923 | |
| 2924 | /* Coping the urb */ |
| 2925 | memcpy(murb, urb, sizeof(struct urb)); |
| 2926 | |
| 2927 | murb->transfer_buffer_length = rem > 0 ? rem : 4096; |
| 2928 | murb->transfer_buffer = transfer_buffer + (num - 1) * 4096; |
| 2929 | |
| 2930 | /* Null pointer for the encodes that this is a micro urb */ |
| 2931 | murb->complete = NULL; |
| 2932 | |
| 2933 | ((struct oxu_murb *) murb)->main = urb; |
| 2934 | ((struct oxu_murb *) murb)->last = 1; |
| 2935 | |
| 2936 | do { |
| 2937 | ret = __oxu_urb_enqueue(hcd, murb, mem_flags); |
| 2938 | if (ret) |
| 2939 | schedule(); |
| 2940 | } while (ret); |
| 2941 | |
| 2942 | return ret; |
| 2943 | } |
| 2944 | |
| 2945 | /* Remove from hardware lists. |
| 2946 | * Completions normally happen asynchronously |
| 2947 | */ |
| 2948 | static int oxu_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
| 2949 | { |
| 2950 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 2951 | struct ehci_qh *qh; |
| 2952 | unsigned long flags; |
| 2953 | |
| 2954 | spin_lock_irqsave(&oxu->lock, flags); |
| 2955 | switch (usb_pipetype(urb->pipe)) { |
| 2956 | case PIPE_CONTROL: |
| 2957 | case PIPE_BULK: |
| 2958 | default: |
| 2959 | qh = (struct ehci_qh *) urb->hcpriv; |
| 2960 | if (!qh) |
| 2961 | break; |
| 2962 | unlink_async(oxu, qh); |
| 2963 | break; |
| 2964 | |
| 2965 | case PIPE_INTERRUPT: |
| 2966 | qh = (struct ehci_qh *) urb->hcpriv; |
| 2967 | if (!qh) |
| 2968 | break; |
| 2969 | switch (qh->qh_state) { |
| 2970 | case QH_STATE_LINKED: |
| 2971 | intr_deschedule(oxu, qh); |
| 2972 | /* FALL THROUGH */ |
| 2973 | case QH_STATE_IDLE: |
| 2974 | qh_completions(oxu, qh); |
| 2975 | break; |
| 2976 | default: |
| 2977 | oxu_dbg(oxu, "bogus qh %p state %d\n", |
| 2978 | qh, qh->qh_state); |
| 2979 | goto done; |
| 2980 | } |
| 2981 | |
| 2982 | /* reschedule QH iff another request is queued */ |
| 2983 | if (!list_empty(&qh->qtd_list) |
| 2984 | && HC_IS_RUNNING(hcd->state)) { |
| 2985 | int status; |
| 2986 | |
| 2987 | status = qh_schedule(oxu, qh); |
| 2988 | spin_unlock_irqrestore(&oxu->lock, flags); |
| 2989 | |
| 2990 | if (status != 0) { |
| 2991 | /* shouldn't happen often, but ... |
| 2992 | * FIXME kill those tds' urbs |
| 2993 | */ |
Greg Kroah-Hartman | 6898079 | 2012-04-20 16:53:35 -0700 | [diff] [blame] | 2994 | dev_err(hcd->self.controller, |
| 2995 | "can't reschedule qh %p, err %d\n", qh, |
| 2996 | status); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 2997 | } |
| 2998 | return status; |
| 2999 | } |
| 3000 | break; |
| 3001 | } |
| 3002 | done: |
| 3003 | spin_unlock_irqrestore(&oxu->lock, flags); |
| 3004 | return 0; |
| 3005 | } |
| 3006 | |
| 3007 | /* Bulk qh holds the data toggle */ |
| 3008 | static void oxu_endpoint_disable(struct usb_hcd *hcd, |
| 3009 | struct usb_host_endpoint *ep) |
| 3010 | { |
| 3011 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 3012 | unsigned long flags; |
| 3013 | struct ehci_qh *qh, *tmp; |
| 3014 | |
| 3015 | /* ASSERT: any requests/urbs are being unlinked */ |
| 3016 | /* ASSERT: nobody can be submitting urbs for this any more */ |
| 3017 | |
| 3018 | rescan: |
| 3019 | spin_lock_irqsave(&oxu->lock, flags); |
| 3020 | qh = ep->hcpriv; |
| 3021 | if (!qh) |
| 3022 | goto done; |
| 3023 | |
| 3024 | /* endpoints can be iso streams. for now, we don't |
| 3025 | * accelerate iso completions ... so spin a while. |
| 3026 | */ |
| 3027 | if (qh->hw_info1 == 0) { |
| 3028 | oxu_vdbg(oxu, "iso delay\n"); |
| 3029 | goto idle_timeout; |
| 3030 | } |
| 3031 | |
| 3032 | if (!HC_IS_RUNNING(hcd->state)) |
| 3033 | qh->qh_state = QH_STATE_IDLE; |
| 3034 | switch (qh->qh_state) { |
| 3035 | case QH_STATE_LINKED: |
| 3036 | for (tmp = oxu->async->qh_next.qh; |
| 3037 | tmp && tmp != qh; |
| 3038 | tmp = tmp->qh_next.qh) |
| 3039 | continue; |
| 3040 | /* periodic qh self-unlinks on empty */ |
| 3041 | if (!tmp) |
| 3042 | goto nogood; |
| 3043 | unlink_async(oxu, qh); |
| 3044 | /* FALL THROUGH */ |
| 3045 | case QH_STATE_UNLINK: /* wait for hw to finish? */ |
| 3046 | idle_timeout: |
| 3047 | spin_unlock_irqrestore(&oxu->lock, flags); |
| 3048 | schedule_timeout_uninterruptible(1); |
| 3049 | goto rescan; |
| 3050 | case QH_STATE_IDLE: /* fully unlinked */ |
| 3051 | if (list_empty(&qh->qtd_list)) { |
| 3052 | qh_put(qh); |
| 3053 | break; |
| 3054 | } |
| 3055 | /* else FALL THROUGH */ |
| 3056 | default: |
| 3057 | nogood: |
| 3058 | /* caller was supposed to have unlinked any requests; |
| 3059 | * that's not our job. just leak this memory. |
| 3060 | */ |
| 3061 | oxu_err(oxu, "qh %p (#%02x) state %d%s\n", |
| 3062 | qh, ep->desc.bEndpointAddress, qh->qh_state, |
| 3063 | list_empty(&qh->qtd_list) ? "" : "(has tds)"); |
| 3064 | break; |
| 3065 | } |
| 3066 | ep->hcpriv = NULL; |
| 3067 | done: |
| 3068 | spin_unlock_irqrestore(&oxu->lock, flags); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3069 | } |
| 3070 | |
| 3071 | static int oxu_get_frame(struct usb_hcd *hcd) |
| 3072 | { |
| 3073 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 3074 | |
| 3075 | return (readl(&oxu->regs->frame_index) >> 3) % |
| 3076 | oxu->periodic_size; |
| 3077 | } |
| 3078 | |
| 3079 | /* Build "status change" packet (one or two bytes) from HC registers */ |
| 3080 | static int oxu_hub_status_data(struct usb_hcd *hcd, char *buf) |
| 3081 | { |
| 3082 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 3083 | u32 temp, mask, status = 0; |
| 3084 | int ports, i, retval = 1; |
| 3085 | unsigned long flags; |
| 3086 | |
Alan Stern | 98f541c | 2013-05-01 12:13:54 -0400 | [diff] [blame] | 3087 | /* if !PM_RUNTIME, root hub timers won't get shut down ... */ |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3088 | if (!HC_IS_RUNNING(hcd->state)) |
| 3089 | return 0; |
| 3090 | |
| 3091 | /* init status to no-changes */ |
| 3092 | buf[0] = 0; |
| 3093 | ports = HCS_N_PORTS(oxu->hcs_params); |
| 3094 | if (ports > 7) { |
| 3095 | buf[1] = 0; |
| 3096 | retval++; |
| 3097 | } |
| 3098 | |
| 3099 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
| 3100 | * causing massive log spam unless we completely ignore them. It |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 3101 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3102 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
| 3103 | * PORT_POWER; that's surprising, but maybe within-spec. |
| 3104 | */ |
| 3105 | if (!ignore_oc) |
| 3106 | mask = PORT_CSC | PORT_PEC | PORT_OCC; |
| 3107 | else |
| 3108 | mask = PORT_CSC | PORT_PEC; |
| 3109 | |
| 3110 | /* no hub change reports (bit 0) for now (power, ...) */ |
| 3111 | |
| 3112 | /* port N changes (bit N)? */ |
| 3113 | spin_lock_irqsave(&oxu->lock, flags); |
| 3114 | for (i = 0; i < ports; i++) { |
| 3115 | temp = readl(&oxu->regs->port_status[i]); |
| 3116 | |
| 3117 | /* |
| 3118 | * Return status information even for ports with OWNER set. |
| 3119 | * Otherwise khubd wouldn't see the disconnect event when a |
| 3120 | * high-speed device is switched over to the companion |
| 3121 | * controller by the user. |
| 3122 | */ |
| 3123 | |
| 3124 | if (!(temp & PORT_CONNECT)) |
| 3125 | oxu->reset_done[i] = 0; |
| 3126 | if ((temp & mask) != 0 || ((temp & PORT_RESUME) != 0 && |
| 3127 | time_after_eq(jiffies, oxu->reset_done[i]))) { |
| 3128 | if (i < 7) |
| 3129 | buf[0] |= 1 << (i + 1); |
| 3130 | else |
| 3131 | buf[1] |= 1 << (i - 7); |
| 3132 | status = STS_PCD; |
| 3133 | } |
| 3134 | } |
| 3135 | /* FIXME autosuspend idle root hubs */ |
| 3136 | spin_unlock_irqrestore(&oxu->lock, flags); |
| 3137 | return status ? retval : 0; |
| 3138 | } |
| 3139 | |
| 3140 | /* Returns the speed of a device attached to a port on the root hub. */ |
| 3141 | static inline unsigned int oxu_port_speed(struct oxu_hcd *oxu, |
| 3142 | unsigned int portsc) |
| 3143 | { |
| 3144 | switch ((portsc >> 26) & 3) { |
| 3145 | case 0: |
| 3146 | return 0; |
| 3147 | case 1: |
Alan Stern | 288ead4 | 2010-03-04 11:32:30 -0500 | [diff] [blame] | 3148 | return USB_PORT_STAT_LOW_SPEED; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3149 | case 2: |
| 3150 | default: |
Alan Stern | 288ead4 | 2010-03-04 11:32:30 -0500 | [diff] [blame] | 3151 | return USB_PORT_STAT_HIGH_SPEED; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3152 | } |
| 3153 | } |
| 3154 | |
| 3155 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
| 3156 | static int oxu_hub_control(struct usb_hcd *hcd, u16 typeReq, |
| 3157 | u16 wValue, u16 wIndex, char *buf, u16 wLength) |
| 3158 | { |
| 3159 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 3160 | int ports = HCS_N_PORTS(oxu->hcs_params); |
| 3161 | u32 __iomem *status_reg = &oxu->regs->port_status[wIndex - 1]; |
| 3162 | u32 temp, status; |
| 3163 | unsigned long flags; |
| 3164 | int retval = 0; |
| 3165 | unsigned selector; |
| 3166 | |
| 3167 | /* |
| 3168 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. |
| 3169 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. |
| 3170 | * (track current state ourselves) ... blink for diagnostics, |
| 3171 | * power, "this is the one", etc. EHCI spec supports this. |
| 3172 | */ |
| 3173 | |
| 3174 | spin_lock_irqsave(&oxu->lock, flags); |
| 3175 | switch (typeReq) { |
| 3176 | case ClearHubFeature: |
| 3177 | switch (wValue) { |
| 3178 | case C_HUB_LOCAL_POWER: |
| 3179 | case C_HUB_OVER_CURRENT: |
| 3180 | /* no hub-wide feature/status flags */ |
| 3181 | break; |
| 3182 | default: |
| 3183 | goto error; |
| 3184 | } |
| 3185 | break; |
| 3186 | case ClearPortFeature: |
| 3187 | if (!wIndex || wIndex > ports) |
| 3188 | goto error; |
| 3189 | wIndex--; |
| 3190 | temp = readl(status_reg); |
| 3191 | |
| 3192 | /* |
| 3193 | * Even if OWNER is set, so the port is owned by the |
| 3194 | * companion controller, khubd needs to be able to clear |
| 3195 | * the port-change status bits (especially |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3196 | * USB_PORT_STAT_C_CONNECTION). |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3197 | */ |
| 3198 | |
| 3199 | switch (wValue) { |
| 3200 | case USB_PORT_FEAT_ENABLE: |
| 3201 | writel(temp & ~PORT_PE, status_reg); |
| 3202 | break; |
| 3203 | case USB_PORT_FEAT_C_ENABLE: |
| 3204 | writel((temp & ~PORT_RWC_BITS) | PORT_PEC, status_reg); |
| 3205 | break; |
| 3206 | case USB_PORT_FEAT_SUSPEND: |
| 3207 | if (temp & PORT_RESET) |
| 3208 | goto error; |
| 3209 | if (temp & PORT_SUSPEND) { |
| 3210 | if ((temp & PORT_PE) == 0) |
| 3211 | goto error; |
| 3212 | /* resume signaling for 20 msec */ |
| 3213 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
| 3214 | writel(temp | PORT_RESUME, status_reg); |
| 3215 | oxu->reset_done[wIndex] = jiffies |
| 3216 | + msecs_to_jiffies(20); |
| 3217 | } |
| 3218 | break; |
| 3219 | case USB_PORT_FEAT_C_SUSPEND: |
| 3220 | /* we auto-clear this feature */ |
| 3221 | break; |
| 3222 | case USB_PORT_FEAT_POWER: |
| 3223 | if (HCS_PPC(oxu->hcs_params)) |
| 3224 | writel(temp & ~(PORT_RWC_BITS | PORT_POWER), |
| 3225 | status_reg); |
| 3226 | break; |
| 3227 | case USB_PORT_FEAT_C_CONNECTION: |
| 3228 | writel((temp & ~PORT_RWC_BITS) | PORT_CSC, status_reg); |
| 3229 | break; |
| 3230 | case USB_PORT_FEAT_C_OVER_CURRENT: |
| 3231 | writel((temp & ~PORT_RWC_BITS) | PORT_OCC, status_reg); |
| 3232 | break; |
| 3233 | case USB_PORT_FEAT_C_RESET: |
| 3234 | /* GetPortStatus clears reset */ |
| 3235 | break; |
| 3236 | default: |
| 3237 | goto error; |
| 3238 | } |
| 3239 | readl(&oxu->regs->command); /* unblock posted write */ |
| 3240 | break; |
| 3241 | case GetHubDescriptor: |
| 3242 | ehci_hub_descriptor(oxu, (struct usb_hub_descriptor *) |
| 3243 | buf); |
| 3244 | break; |
| 3245 | case GetHubStatus: |
| 3246 | /* no hub-wide feature/status flags */ |
| 3247 | memset(buf, 0, 4); |
| 3248 | break; |
| 3249 | case GetPortStatus: |
| 3250 | if (!wIndex || wIndex > ports) |
| 3251 | goto error; |
| 3252 | wIndex--; |
| 3253 | status = 0; |
| 3254 | temp = readl(status_reg); |
| 3255 | |
| 3256 | /* wPortChange bits */ |
| 3257 | if (temp & PORT_CSC) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3258 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3259 | if (temp & PORT_PEC) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3260 | status |= USB_PORT_STAT_C_ENABLE << 16; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3261 | if ((temp & PORT_OCC) && !ignore_oc) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3262 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3263 | |
| 3264 | /* whoever resumes must GetPortStatus to complete it!! */ |
| 3265 | if (temp & PORT_RESUME) { |
| 3266 | |
| 3267 | /* Remote Wakeup received? */ |
| 3268 | if (!oxu->reset_done[wIndex]) { |
| 3269 | /* resume signaling for 20 msec */ |
| 3270 | oxu->reset_done[wIndex] = jiffies |
| 3271 | + msecs_to_jiffies(20); |
| 3272 | /* check the port again */ |
| 3273 | mod_timer(&oxu_to_hcd(oxu)->rh_timer, |
| 3274 | oxu->reset_done[wIndex]); |
| 3275 | } |
| 3276 | |
| 3277 | /* resume completed? */ |
| 3278 | else if (time_after_eq(jiffies, |
| 3279 | oxu->reset_done[wIndex])) { |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3280 | status |= USB_PORT_STAT_C_SUSPEND << 16; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3281 | oxu->reset_done[wIndex] = 0; |
| 3282 | |
| 3283 | /* stop resume signaling */ |
| 3284 | temp = readl(status_reg); |
| 3285 | writel(temp & ~(PORT_RWC_BITS | PORT_RESUME), |
| 3286 | status_reg); |
| 3287 | retval = handshake(oxu, status_reg, |
| 3288 | PORT_RESUME, 0, 2000 /* 2msec */); |
| 3289 | if (retval != 0) { |
| 3290 | oxu_err(oxu, |
| 3291 | "port %d resume error %d\n", |
| 3292 | wIndex + 1, retval); |
| 3293 | goto error; |
| 3294 | } |
| 3295 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); |
| 3296 | } |
| 3297 | } |
| 3298 | |
| 3299 | /* whoever resets must GetPortStatus to complete it!! */ |
| 3300 | if ((temp & PORT_RESET) |
| 3301 | && time_after_eq(jiffies, |
| 3302 | oxu->reset_done[wIndex])) { |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3303 | status |= USB_PORT_STAT_C_RESET << 16; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3304 | oxu->reset_done[wIndex] = 0; |
| 3305 | |
| 3306 | /* force reset to complete */ |
| 3307 | writel(temp & ~(PORT_RWC_BITS | PORT_RESET), |
| 3308 | status_reg); |
| 3309 | /* REVISIT: some hardware needs 550+ usec to clear |
| 3310 | * this bit; seems too long to spin routinely... |
| 3311 | */ |
| 3312 | retval = handshake(oxu, status_reg, |
| 3313 | PORT_RESET, 0, 750); |
| 3314 | if (retval != 0) { |
| 3315 | oxu_err(oxu, "port %d reset error %d\n", |
| 3316 | wIndex + 1, retval); |
| 3317 | goto error; |
| 3318 | } |
| 3319 | |
| 3320 | /* see what we found out */ |
| 3321 | temp = check_reset_complete(oxu, wIndex, status_reg, |
| 3322 | readl(status_reg)); |
| 3323 | } |
| 3324 | |
| 3325 | /* transfer dedicated ports to the companion hc */ |
| 3326 | if ((temp & PORT_CONNECT) && |
| 3327 | test_bit(wIndex, &oxu->companion_ports)) { |
| 3328 | temp &= ~PORT_RWC_BITS; |
| 3329 | temp |= PORT_OWNER; |
| 3330 | writel(temp, status_reg); |
| 3331 | oxu_dbg(oxu, "port %d --> companion\n", wIndex + 1); |
| 3332 | temp = readl(status_reg); |
| 3333 | } |
| 3334 | |
| 3335 | /* |
| 3336 | * Even if OWNER is set, there's no harm letting khubd |
| 3337 | * see the wPortStatus values (they should all be 0 except |
| 3338 | * for PORT_POWER anyway). |
| 3339 | */ |
| 3340 | |
| 3341 | if (temp & PORT_CONNECT) { |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3342 | status |= USB_PORT_STAT_CONNECTION; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3343 | /* status may be from integrated TT */ |
| 3344 | status |= oxu_port_speed(oxu, temp); |
| 3345 | } |
| 3346 | if (temp & PORT_PE) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3347 | status |= USB_PORT_STAT_ENABLE; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3348 | if (temp & (PORT_SUSPEND|PORT_RESUME)) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3349 | status |= USB_PORT_STAT_SUSPEND; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3350 | if (temp & PORT_OC) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3351 | status |= USB_PORT_STAT_OVERCURRENT; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3352 | if (temp & PORT_RESET) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3353 | status |= USB_PORT_STAT_RESET; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3354 | if (temp & PORT_POWER) |
Alan Stern | 749da5f | 2010-03-04 17:05:08 -0500 | [diff] [blame] | 3355 | status |= USB_PORT_STAT_POWER; |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3356 | |
| 3357 | #ifndef OXU_VERBOSE_DEBUG |
| 3358 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
| 3359 | #endif |
| 3360 | dbg_port(oxu, "GetStatus", wIndex + 1, temp); |
| 3361 | put_unaligned(cpu_to_le32(status), (__le32 *) buf); |
| 3362 | break; |
| 3363 | case SetHubFeature: |
| 3364 | switch (wValue) { |
| 3365 | case C_HUB_LOCAL_POWER: |
| 3366 | case C_HUB_OVER_CURRENT: |
| 3367 | /* no hub-wide feature/status flags */ |
| 3368 | break; |
| 3369 | default: |
| 3370 | goto error; |
| 3371 | } |
| 3372 | break; |
| 3373 | case SetPortFeature: |
| 3374 | selector = wIndex >> 8; |
| 3375 | wIndex &= 0xff; |
| 3376 | if (!wIndex || wIndex > ports) |
| 3377 | goto error; |
| 3378 | wIndex--; |
| 3379 | temp = readl(status_reg); |
| 3380 | if (temp & PORT_OWNER) |
| 3381 | break; |
| 3382 | |
| 3383 | temp &= ~PORT_RWC_BITS; |
| 3384 | switch (wValue) { |
| 3385 | case USB_PORT_FEAT_SUSPEND: |
| 3386 | if ((temp & PORT_PE) == 0 |
| 3387 | || (temp & PORT_RESET) != 0) |
| 3388 | goto error; |
| 3389 | if (device_may_wakeup(&hcd->self.root_hub->dev)) |
| 3390 | temp |= PORT_WAKE_BITS; |
| 3391 | writel(temp | PORT_SUSPEND, status_reg); |
| 3392 | break; |
| 3393 | case USB_PORT_FEAT_POWER: |
| 3394 | if (HCS_PPC(oxu->hcs_params)) |
| 3395 | writel(temp | PORT_POWER, status_reg); |
| 3396 | break; |
| 3397 | case USB_PORT_FEAT_RESET: |
| 3398 | if (temp & PORT_RESUME) |
| 3399 | goto error; |
| 3400 | /* line status bits may report this as low speed, |
| 3401 | * which can be fine if this root hub has a |
| 3402 | * transaction translator built in. |
| 3403 | */ |
| 3404 | oxu_vdbg(oxu, "port %d reset\n", wIndex + 1); |
| 3405 | temp |= PORT_RESET; |
| 3406 | temp &= ~PORT_PE; |
| 3407 | |
| 3408 | /* |
| 3409 | * caller must wait, then call GetPortStatus |
| 3410 | * usb 2.0 spec says 50 ms resets on root |
| 3411 | */ |
| 3412 | oxu->reset_done[wIndex] = jiffies |
| 3413 | + msecs_to_jiffies(50); |
| 3414 | writel(temp, status_reg); |
| 3415 | break; |
| 3416 | |
| 3417 | /* For downstream facing ports (these): one hub port is put |
| 3418 | * into test mode according to USB2 11.24.2.13, then the hub |
| 3419 | * must be reset (which for root hub now means rmmod+modprobe, |
| 3420 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info |
| 3421 | * about the EHCI-specific stuff. |
| 3422 | */ |
| 3423 | case USB_PORT_FEAT_TEST: |
| 3424 | if (!selector || selector > 5) |
| 3425 | goto error; |
| 3426 | ehci_quiesce(oxu); |
| 3427 | ehci_halt(oxu); |
| 3428 | temp |= selector << 16; |
| 3429 | writel(temp, status_reg); |
| 3430 | break; |
| 3431 | |
| 3432 | default: |
| 3433 | goto error; |
| 3434 | } |
| 3435 | readl(&oxu->regs->command); /* unblock posted writes */ |
| 3436 | break; |
| 3437 | |
| 3438 | default: |
| 3439 | error: |
| 3440 | /* "stall" on error */ |
| 3441 | retval = -EPIPE; |
| 3442 | } |
| 3443 | spin_unlock_irqrestore(&oxu->lock, flags); |
| 3444 | return retval; |
| 3445 | } |
| 3446 | |
| 3447 | #ifdef CONFIG_PM |
| 3448 | |
| 3449 | static int oxu_bus_suspend(struct usb_hcd *hcd) |
| 3450 | { |
| 3451 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 3452 | int port; |
| 3453 | int mask; |
| 3454 | |
| 3455 | oxu_dbg(oxu, "suspend root hub\n"); |
| 3456 | |
| 3457 | if (time_before(jiffies, oxu->next_statechange)) |
| 3458 | msleep(5); |
| 3459 | |
| 3460 | port = HCS_N_PORTS(oxu->hcs_params); |
| 3461 | spin_lock_irq(&oxu->lock); |
| 3462 | |
| 3463 | /* stop schedules, clean any completed work */ |
| 3464 | if (HC_IS_RUNNING(hcd->state)) { |
| 3465 | ehci_quiesce(oxu); |
| 3466 | hcd->state = HC_STATE_QUIESCING; |
| 3467 | } |
| 3468 | oxu->command = readl(&oxu->regs->command); |
| 3469 | if (oxu->reclaim) |
| 3470 | oxu->reclaim_ready = 1; |
| 3471 | ehci_work(oxu); |
| 3472 | |
| 3473 | /* Unlike other USB host controller types, EHCI doesn't have |
| 3474 | * any notion of "global" or bus-wide suspend. The driver has |
| 3475 | * to manually suspend all the active unsuspended ports, and |
| 3476 | * then manually resume them in the bus_resume() routine. |
| 3477 | */ |
| 3478 | oxu->bus_suspended = 0; |
| 3479 | while (port--) { |
| 3480 | u32 __iomem *reg = &oxu->regs->port_status[port]; |
| 3481 | u32 t1 = readl(reg) & ~PORT_RWC_BITS; |
| 3482 | u32 t2 = t1; |
| 3483 | |
| 3484 | /* keep track of which ports we suspend */ |
| 3485 | if ((t1 & PORT_PE) && !(t1 & PORT_OWNER) && |
| 3486 | !(t1 & PORT_SUSPEND)) { |
| 3487 | t2 |= PORT_SUSPEND; |
| 3488 | set_bit(port, &oxu->bus_suspended); |
| 3489 | } |
| 3490 | |
| 3491 | /* enable remote wakeup on all ports */ |
| 3492 | if (device_may_wakeup(&hcd->self.root_hub->dev)) |
| 3493 | t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E; |
| 3494 | else |
| 3495 | t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E); |
| 3496 | |
| 3497 | if (t1 != t2) { |
| 3498 | oxu_vdbg(oxu, "port %d, %08x -> %08x\n", |
| 3499 | port + 1, t1, t2); |
| 3500 | writel(t2, reg); |
| 3501 | } |
| 3502 | } |
| 3503 | |
| 3504 | /* turn off now-idle HC */ |
| 3505 | del_timer_sync(&oxu->watchdog); |
| 3506 | ehci_halt(oxu); |
| 3507 | hcd->state = HC_STATE_SUSPENDED; |
| 3508 | |
| 3509 | /* allow remote wakeup */ |
| 3510 | mask = INTR_MASK; |
| 3511 | if (!device_may_wakeup(&hcd->self.root_hub->dev)) |
| 3512 | mask &= ~STS_PCD; |
| 3513 | writel(mask, &oxu->regs->intr_enable); |
| 3514 | readl(&oxu->regs->intr_enable); |
| 3515 | |
| 3516 | oxu->next_statechange = jiffies + msecs_to_jiffies(10); |
| 3517 | spin_unlock_irq(&oxu->lock); |
| 3518 | return 0; |
| 3519 | } |
| 3520 | |
| 3521 | /* Caller has locked the root hub, and should reset/reinit on error */ |
| 3522 | static int oxu_bus_resume(struct usb_hcd *hcd) |
| 3523 | { |
| 3524 | struct oxu_hcd *oxu = hcd_to_oxu(hcd); |
| 3525 | u32 temp; |
| 3526 | int i; |
| 3527 | |
| 3528 | if (time_before(jiffies, oxu->next_statechange)) |
| 3529 | msleep(5); |
| 3530 | spin_lock_irq(&oxu->lock); |
| 3531 | |
| 3532 | /* Ideally and we've got a real resume here, and no port's power |
| 3533 | * was lost. (For PCI, that means Vaux was maintained.) But we |
| 3534 | * could instead be restoring a swsusp snapshot -- so that BIOS was |
| 3535 | * the last user of the controller, not reset/pm hardware keeping |
| 3536 | * state we gave to it. |
| 3537 | */ |
| 3538 | temp = readl(&oxu->regs->intr_enable); |
| 3539 | oxu_dbg(oxu, "resume root hub%s\n", temp ? "" : " after power loss"); |
| 3540 | |
| 3541 | /* at least some APM implementations will try to deliver |
| 3542 | * IRQs right away, so delay them until we're ready. |
| 3543 | */ |
| 3544 | writel(0, &oxu->regs->intr_enable); |
| 3545 | |
| 3546 | /* re-init operational registers */ |
| 3547 | writel(0, &oxu->regs->segment); |
| 3548 | writel(oxu->periodic_dma, &oxu->regs->frame_list); |
| 3549 | writel((u32) oxu->async->qh_dma, &oxu->regs->async_next); |
| 3550 | |
| 3551 | /* restore CMD_RUN, framelist size, and irq threshold */ |
| 3552 | writel(oxu->command, &oxu->regs->command); |
| 3553 | |
| 3554 | /* Some controller/firmware combinations need a delay during which |
| 3555 | * they set up the port statuses. See Bugzilla #8190. */ |
| 3556 | mdelay(8); |
| 3557 | |
| 3558 | /* manually resume the ports we suspended during bus_suspend() */ |
| 3559 | i = HCS_N_PORTS(oxu->hcs_params); |
| 3560 | while (i--) { |
| 3561 | temp = readl(&oxu->regs->port_status[i]); |
| 3562 | temp &= ~(PORT_RWC_BITS |
| 3563 | | PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E); |
| 3564 | if (test_bit(i, &oxu->bus_suspended) && (temp & PORT_SUSPEND)) { |
| 3565 | oxu->reset_done[i] = jiffies + msecs_to_jiffies(20); |
| 3566 | temp |= PORT_RESUME; |
| 3567 | } |
| 3568 | writel(temp, &oxu->regs->port_status[i]); |
| 3569 | } |
| 3570 | i = HCS_N_PORTS(oxu->hcs_params); |
| 3571 | mdelay(20); |
| 3572 | while (i--) { |
| 3573 | temp = readl(&oxu->regs->port_status[i]); |
| 3574 | if (test_bit(i, &oxu->bus_suspended) && (temp & PORT_SUSPEND)) { |
| 3575 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); |
| 3576 | writel(temp, &oxu->regs->port_status[i]); |
| 3577 | oxu_vdbg(oxu, "resumed port %d\n", i + 1); |
| 3578 | } |
| 3579 | } |
| 3580 | (void) readl(&oxu->regs->command); |
| 3581 | |
| 3582 | /* maybe re-activate the schedule(s) */ |
| 3583 | temp = 0; |
| 3584 | if (oxu->async->qh_next.qh) |
| 3585 | temp |= CMD_ASE; |
| 3586 | if (oxu->periodic_sched) |
| 3587 | temp |= CMD_PSE; |
| 3588 | if (temp) { |
| 3589 | oxu->command |= temp; |
| 3590 | writel(oxu->command, &oxu->regs->command); |
| 3591 | } |
| 3592 | |
| 3593 | oxu->next_statechange = jiffies + msecs_to_jiffies(5); |
| 3594 | hcd->state = HC_STATE_RUNNING; |
| 3595 | |
| 3596 | /* Now we can safely re-enable irqs */ |
| 3597 | writel(INTR_MASK, &oxu->regs->intr_enable); |
| 3598 | |
| 3599 | spin_unlock_irq(&oxu->lock); |
| 3600 | return 0; |
| 3601 | } |
| 3602 | |
| 3603 | #else |
| 3604 | |
| 3605 | static int oxu_bus_suspend(struct usb_hcd *hcd) |
| 3606 | { |
| 3607 | return 0; |
| 3608 | } |
| 3609 | |
| 3610 | static int oxu_bus_resume(struct usb_hcd *hcd) |
| 3611 | { |
| 3612 | return 0; |
| 3613 | } |
| 3614 | |
| 3615 | #endif /* CONFIG_PM */ |
| 3616 | |
| 3617 | static const struct hc_driver oxu_hc_driver = { |
| 3618 | .description = "oxu210hp_hcd", |
| 3619 | .product_desc = "oxu210hp HCD", |
| 3620 | .hcd_priv_size = sizeof(struct oxu_hcd), |
| 3621 | |
| 3622 | /* |
| 3623 | * Generic hardware linkage |
| 3624 | */ |
| 3625 | .irq = oxu_irq, |
| 3626 | .flags = HCD_MEMORY | HCD_USB2, |
| 3627 | |
| 3628 | /* |
| 3629 | * Basic lifecycle operations |
| 3630 | */ |
| 3631 | .reset = oxu_reset, |
| 3632 | .start = oxu_run, |
| 3633 | .stop = oxu_stop, |
| 3634 | .shutdown = oxu_shutdown, |
| 3635 | |
| 3636 | /* |
| 3637 | * Managing i/o requests and associated device resources |
| 3638 | */ |
| 3639 | .urb_enqueue = oxu_urb_enqueue, |
| 3640 | .urb_dequeue = oxu_urb_dequeue, |
| 3641 | .endpoint_disable = oxu_endpoint_disable, |
| 3642 | |
| 3643 | /* |
| 3644 | * Scheduling support |
| 3645 | */ |
| 3646 | .get_frame_number = oxu_get_frame, |
| 3647 | |
| 3648 | /* |
| 3649 | * Root hub support |
| 3650 | */ |
| 3651 | .hub_status_data = oxu_hub_status_data, |
| 3652 | .hub_control = oxu_hub_control, |
| 3653 | .bus_suspend = oxu_bus_suspend, |
| 3654 | .bus_resume = oxu_bus_resume, |
| 3655 | }; |
| 3656 | |
| 3657 | /* |
| 3658 | * Module stuff |
| 3659 | */ |
| 3660 | |
| 3661 | static void oxu_configuration(struct platform_device *pdev, void *base) |
| 3662 | { |
| 3663 | u32 tmp; |
| 3664 | |
| 3665 | /* Initialize top level registers. |
| 3666 | * First write ever |
| 3667 | */ |
| 3668 | oxu_writel(base, OXU_HOSTIFCONFIG, 0x0000037D); |
| 3669 | oxu_writel(base, OXU_SOFTRESET, OXU_SRESET); |
| 3670 | oxu_writel(base, OXU_HOSTIFCONFIG, 0x0000037D); |
| 3671 | |
| 3672 | tmp = oxu_readl(base, OXU_PIOBURSTREADCTRL); |
| 3673 | oxu_writel(base, OXU_PIOBURSTREADCTRL, tmp | 0x0040); |
| 3674 | |
| 3675 | oxu_writel(base, OXU_ASO, OXU_SPHPOEN | OXU_OVRCCURPUPDEN | |
| 3676 | OXU_COMPARATOR | OXU_ASO_OP); |
| 3677 | |
| 3678 | tmp = oxu_readl(base, OXU_CLKCTRL_SET); |
| 3679 | oxu_writel(base, OXU_CLKCTRL_SET, tmp | OXU_SYSCLKEN | OXU_USBOTGCLKEN); |
| 3680 | |
| 3681 | /* Clear all top interrupt enable */ |
| 3682 | oxu_writel(base, OXU_CHIPIRQEN_CLR, 0xff); |
| 3683 | |
| 3684 | /* Clear all top interrupt status */ |
| 3685 | oxu_writel(base, OXU_CHIPIRQSTATUS, 0xff); |
| 3686 | |
| 3687 | /* Enable all needed top interrupt except OTG SPH core */ |
| 3688 | oxu_writel(base, OXU_CHIPIRQEN_SET, OXU_USBSPHLPWUI | OXU_USBOTGLPWUI); |
| 3689 | } |
| 3690 | |
| 3691 | static int oxu_verify_id(struct platform_device *pdev, void *base) |
| 3692 | { |
| 3693 | u32 id; |
Joe Perches | 82cef0b | 2010-09-13 21:23:58 -0700 | [diff] [blame] | 3694 | static const char * const bo[] = { |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3695 | "reserved", |
| 3696 | "128-pin LQFP", |
| 3697 | "84-pin TFBGA", |
| 3698 | "reserved", |
| 3699 | }; |
| 3700 | |
| 3701 | /* Read controller signature register to find a match */ |
| 3702 | id = oxu_readl(base, OXU_DEVICEID); |
| 3703 | dev_info(&pdev->dev, "device ID %x\n", id); |
| 3704 | if ((id & OXU_REV_MASK) != (OXU_REV_2100 << OXU_REV_SHIFT)) |
| 3705 | return -1; |
| 3706 | |
| 3707 | dev_info(&pdev->dev, "found device %x %s (%04x:%04x)\n", |
| 3708 | id >> OXU_REV_SHIFT, |
| 3709 | bo[(id & OXU_BO_MASK) >> OXU_BO_SHIFT], |
| 3710 | (id & OXU_MAJ_REV_MASK) >> OXU_MAJ_REV_SHIFT, |
| 3711 | (id & OXU_MIN_REV_MASK) >> OXU_MIN_REV_SHIFT); |
| 3712 | |
| 3713 | return 0; |
| 3714 | } |
| 3715 | |
| 3716 | static const struct hc_driver oxu_hc_driver; |
| 3717 | static struct usb_hcd *oxu_create(struct platform_device *pdev, |
| 3718 | unsigned long memstart, unsigned long memlen, |
| 3719 | void *base, int irq, int otg) |
| 3720 | { |
| 3721 | struct device *dev = &pdev->dev; |
| 3722 | |
| 3723 | struct usb_hcd *hcd; |
| 3724 | struct oxu_hcd *oxu; |
| 3725 | int ret; |
| 3726 | |
| 3727 | /* Set endian mode and host mode */ |
| 3728 | oxu_writel(base + (otg ? OXU_OTG_CORE_OFFSET : OXU_SPH_CORE_OFFSET), |
| 3729 | OXU_USBMODE, |
| 3730 | OXU_CM_HOST_ONLY | OXU_ES_LITTLE | OXU_VBPS); |
| 3731 | |
| 3732 | hcd = usb_create_hcd(&oxu_hc_driver, dev, |
| 3733 | otg ? "oxu210hp_otg" : "oxu210hp_sph"); |
| 3734 | if (!hcd) |
| 3735 | return ERR_PTR(-ENOMEM); |
| 3736 | |
| 3737 | hcd->rsrc_start = memstart; |
| 3738 | hcd->rsrc_len = memlen; |
| 3739 | hcd->regs = base; |
| 3740 | hcd->irq = irq; |
| 3741 | hcd->state = HC_STATE_HALT; |
| 3742 | |
| 3743 | oxu = hcd_to_oxu(hcd); |
| 3744 | oxu->is_otg = otg; |
| 3745 | |
| 3746 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
| 3747 | if (ret < 0) |
| 3748 | return ERR_PTR(ret); |
| 3749 | |
| 3750 | return hcd; |
| 3751 | } |
| 3752 | |
| 3753 | static int oxu_init(struct platform_device *pdev, |
| 3754 | unsigned long memstart, unsigned long memlen, |
| 3755 | void *base, int irq) |
| 3756 | { |
| 3757 | struct oxu_info *info = platform_get_drvdata(pdev); |
| 3758 | struct usb_hcd *hcd; |
| 3759 | int ret; |
| 3760 | |
| 3761 | /* First time configuration at start up */ |
| 3762 | oxu_configuration(pdev, base); |
| 3763 | |
| 3764 | ret = oxu_verify_id(pdev, base); |
| 3765 | if (ret) { |
| 3766 | dev_err(&pdev->dev, "no devices found!\n"); |
| 3767 | return -ENODEV; |
| 3768 | } |
| 3769 | |
| 3770 | /* Create the OTG controller */ |
| 3771 | hcd = oxu_create(pdev, memstart, memlen, base, irq, 1); |
| 3772 | if (IS_ERR(hcd)) { |
| 3773 | dev_err(&pdev->dev, "cannot create OTG controller!\n"); |
| 3774 | ret = PTR_ERR(hcd); |
| 3775 | goto error_create_otg; |
| 3776 | } |
| 3777 | info->hcd[0] = hcd; |
| 3778 | |
| 3779 | /* Create the SPH host controller */ |
| 3780 | hcd = oxu_create(pdev, memstart, memlen, base, irq, 0); |
| 3781 | if (IS_ERR(hcd)) { |
| 3782 | dev_err(&pdev->dev, "cannot create SPH controller!\n"); |
| 3783 | ret = PTR_ERR(hcd); |
| 3784 | goto error_create_sph; |
| 3785 | } |
| 3786 | info->hcd[1] = hcd; |
| 3787 | |
| 3788 | oxu_writel(base, OXU_CHIPIRQEN_SET, |
| 3789 | oxu_readl(base, OXU_CHIPIRQEN_SET) | 3); |
| 3790 | |
| 3791 | return 0; |
| 3792 | |
| 3793 | error_create_sph: |
| 3794 | usb_remove_hcd(info->hcd[0]); |
| 3795 | usb_put_hcd(info->hcd[0]); |
| 3796 | |
| 3797 | error_create_otg: |
| 3798 | return ret; |
| 3799 | } |
| 3800 | |
| 3801 | static int oxu_drv_probe(struct platform_device *pdev) |
| 3802 | { |
| 3803 | struct resource *res; |
| 3804 | void *base; |
| 3805 | unsigned long memstart, memlen; |
| 3806 | int irq, ret; |
| 3807 | struct oxu_info *info; |
| 3808 | |
| 3809 | if (usb_disabled()) |
| 3810 | return -ENODEV; |
| 3811 | |
| 3812 | /* |
| 3813 | * Get the platform resources |
| 3814 | */ |
| 3815 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 3816 | if (!res) { |
| 3817 | dev_err(&pdev->dev, |
Kay Sievers | 74c71eb | 2008-11-07 01:47:15 +0100 | [diff] [blame] | 3818 | "no IRQ! Check %s setup!\n", dev_name(&pdev->dev)); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3819 | return -ENODEV; |
| 3820 | } |
| 3821 | irq = res->start; |
| 3822 | dev_dbg(&pdev->dev, "IRQ resource %d\n", irq); |
| 3823 | |
| 3824 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 3825 | if (!res) { |
| 3826 | dev_err(&pdev->dev, "no registers address! Check %s setup!\n", |
Kay Sievers | 74c71eb | 2008-11-07 01:47:15 +0100 | [diff] [blame] | 3827 | dev_name(&pdev->dev)); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3828 | return -ENODEV; |
| 3829 | } |
| 3830 | memstart = res->start; |
Joe Perches | 28f65c11 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 3831 | memlen = resource_size(res); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3832 | dev_dbg(&pdev->dev, "MEM resource %lx-%lx\n", memstart, memlen); |
| 3833 | if (!request_mem_region(memstart, memlen, |
| 3834 | oxu_hc_driver.description)) { |
| 3835 | dev_dbg(&pdev->dev, "memory area already in use\n"); |
| 3836 | return -EBUSY; |
| 3837 | } |
| 3838 | |
Thomas Gleixner | dced35a | 2011-03-28 17:49:12 +0200 | [diff] [blame] | 3839 | ret = irq_set_irq_type(irq, IRQF_TRIGGER_FALLING); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3840 | if (ret) { |
| 3841 | dev_err(&pdev->dev, "error setting irq type\n"); |
| 3842 | ret = -EFAULT; |
| 3843 | goto error_set_irq_type; |
| 3844 | } |
| 3845 | |
| 3846 | base = ioremap(memstart, memlen); |
| 3847 | if (!base) { |
| 3848 | dev_dbg(&pdev->dev, "error mapping memory\n"); |
| 3849 | ret = -EFAULT; |
| 3850 | goto error_ioremap; |
| 3851 | } |
| 3852 | |
| 3853 | /* Allocate a driver data struct to hold useful info for both |
| 3854 | * SPH & OTG devices |
| 3855 | */ |
| 3856 | info = kzalloc(sizeof(struct oxu_info), GFP_KERNEL); |
| 3857 | if (!info) { |
| 3858 | dev_dbg(&pdev->dev, "error allocating memory\n"); |
| 3859 | ret = -EFAULT; |
| 3860 | goto error_alloc; |
| 3861 | } |
| 3862 | platform_set_drvdata(pdev, info); |
| 3863 | |
| 3864 | ret = oxu_init(pdev, memstart, memlen, base, irq); |
| 3865 | if (ret < 0) { |
| 3866 | dev_dbg(&pdev->dev, "cannot init USB devices\n"); |
| 3867 | goto error_init; |
| 3868 | } |
| 3869 | |
| 3870 | dev_info(&pdev->dev, "devices enabled and running\n"); |
| 3871 | platform_set_drvdata(pdev, info); |
| 3872 | |
| 3873 | return 0; |
| 3874 | |
| 3875 | error_init: |
| 3876 | kfree(info); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3877 | |
| 3878 | error_alloc: |
| 3879 | iounmap(base); |
| 3880 | |
| 3881 | error_set_irq_type: |
| 3882 | error_ioremap: |
| 3883 | release_mem_region(memstart, memlen); |
| 3884 | |
Kay Sievers | 74c71eb | 2008-11-07 01:47:15 +0100 | [diff] [blame] | 3885 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3886 | return ret; |
| 3887 | } |
| 3888 | |
| 3889 | static void oxu_remove(struct platform_device *pdev, struct usb_hcd *hcd) |
| 3890 | { |
| 3891 | usb_remove_hcd(hcd); |
| 3892 | usb_put_hcd(hcd); |
| 3893 | } |
| 3894 | |
| 3895 | static int oxu_drv_remove(struct platform_device *pdev) |
| 3896 | { |
| 3897 | struct oxu_info *info = platform_get_drvdata(pdev); |
| 3898 | unsigned long memstart = info->hcd[0]->rsrc_start, |
| 3899 | memlen = info->hcd[0]->rsrc_len; |
| 3900 | void *base = info->hcd[0]->regs; |
| 3901 | |
| 3902 | oxu_remove(pdev, info->hcd[0]); |
| 3903 | oxu_remove(pdev, info->hcd[1]); |
| 3904 | |
| 3905 | iounmap(base); |
| 3906 | release_mem_region(memstart, memlen); |
| 3907 | |
| 3908 | kfree(info); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3909 | |
| 3910 | return 0; |
| 3911 | } |
| 3912 | |
| 3913 | static void oxu_drv_shutdown(struct platform_device *pdev) |
| 3914 | { |
| 3915 | oxu_drv_remove(pdev); |
| 3916 | } |
| 3917 | |
| 3918 | #if 0 |
| 3919 | /* FIXME: TODO */ |
| 3920 | static int oxu_drv_suspend(struct device *dev) |
| 3921 | { |
| 3922 | struct platform_device *pdev = to_platform_device(dev); |
| 3923 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
| 3924 | |
| 3925 | return 0; |
| 3926 | } |
| 3927 | |
| 3928 | static int oxu_drv_resume(struct device *dev) |
| 3929 | { |
| 3930 | struct platform_device *pdev = to_platform_device(dev); |
| 3931 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
| 3932 | |
| 3933 | return 0; |
| 3934 | } |
| 3935 | #else |
| 3936 | #define oxu_drv_suspend NULL |
| 3937 | #define oxu_drv_resume NULL |
| 3938 | #endif |
| 3939 | |
| 3940 | static struct platform_driver oxu_driver = { |
| 3941 | .probe = oxu_drv_probe, |
| 3942 | .remove = oxu_drv_remove, |
| 3943 | .shutdown = oxu_drv_shutdown, |
| 3944 | .suspend = oxu_drv_suspend, |
| 3945 | .resume = oxu_drv_resume, |
| 3946 | .driver = { |
| 3947 | .name = "oxu210hp-hcd", |
| 3948 | .bus = &platform_bus_type |
| 3949 | } |
| 3950 | }; |
| 3951 | |
Axel Lin | cc27c96 | 2011-11-27 20:16:27 +0800 | [diff] [blame] | 3952 | module_platform_driver(oxu_driver); |
Rodolfo Giometti | b92a78e | 2008-10-23 10:08:07 +0200 | [diff] [blame] | 3953 | |
| 3954 | MODULE_DESCRIPTION("Oxford OXU210HP HCD driver - ver. " DRIVER_VERSION); |
| 3955 | MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); |
| 3956 | MODULE_LICENSE("GPL"); |