Imre Deak | 569755c | 2007-07-17 04:05:56 -0700 | [diff] [blame] | 1 | /* |
| 2 | * OMAP1 internal LCD controller |
| 3 | * |
| 4 | * Copyright (C) 2004 Nokia Corporation |
| 5 | * Author: Imre Deak <imre.deak@nokia.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by the |
| 9 | * Free Software Foundation; either version 2 of the License, or (at your |
| 10 | * option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, but |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 20 | */ |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/device.h> |
| 23 | #include <linux/interrupt.h> |
| 24 | #include <linux/spinlock.h> |
| 25 | #include <linux/err.h> |
| 26 | #include <linux/mm.h> |
| 27 | #include <linux/fb.h> |
| 28 | #include <linux/dma-mapping.h> |
| 29 | #include <linux/vmalloc.h> |
| 30 | #include <linux/clk.h> |
| 31 | |
| 32 | #include <asm/arch/dma.h> |
| 33 | #include <asm/arch/omapfb.h> |
| 34 | |
| 35 | #include <asm/mach-types.h> |
| 36 | |
| 37 | #define MODULE_NAME "lcdc" |
| 38 | |
| 39 | #define OMAP_LCDC_BASE 0xfffec000 |
| 40 | #define OMAP_LCDC_SIZE 256 |
| 41 | #define OMAP_LCDC_IRQ INT_LCD_CTRL |
| 42 | |
| 43 | #define OMAP_LCDC_CONTROL (OMAP_LCDC_BASE + 0x00) |
| 44 | #define OMAP_LCDC_TIMING0 (OMAP_LCDC_BASE + 0x04) |
| 45 | #define OMAP_LCDC_TIMING1 (OMAP_LCDC_BASE + 0x08) |
| 46 | #define OMAP_LCDC_TIMING2 (OMAP_LCDC_BASE + 0x0c) |
| 47 | #define OMAP_LCDC_STATUS (OMAP_LCDC_BASE + 0x10) |
| 48 | #define OMAP_LCDC_SUBPANEL (OMAP_LCDC_BASE + 0x14) |
| 49 | #define OMAP_LCDC_LINE_INT (OMAP_LCDC_BASE + 0x18) |
| 50 | #define OMAP_LCDC_DISPLAY_STATUS (OMAP_LCDC_BASE + 0x1c) |
| 51 | |
| 52 | #define OMAP_LCDC_STAT_DONE (1 << 0) |
| 53 | #define OMAP_LCDC_STAT_VSYNC (1 << 1) |
| 54 | #define OMAP_LCDC_STAT_SYNC_LOST (1 << 2) |
| 55 | #define OMAP_LCDC_STAT_ABC (1 << 3) |
| 56 | #define OMAP_LCDC_STAT_LINE_INT (1 << 4) |
| 57 | #define OMAP_LCDC_STAT_FUF (1 << 5) |
| 58 | #define OMAP_LCDC_STAT_LOADED_PALETTE (1 << 6) |
| 59 | |
| 60 | #define OMAP_LCDC_CTRL_LCD_EN (1 << 0) |
| 61 | #define OMAP_LCDC_CTRL_LCD_TFT (1 << 7) |
| 62 | #define OMAP_LCDC_CTRL_LINE_IRQ_CLR_SEL (1 << 10) |
| 63 | |
| 64 | #define OMAP_LCDC_IRQ_VSYNC (1 << 2) |
| 65 | #define OMAP_LCDC_IRQ_DONE (1 << 3) |
| 66 | #define OMAP_LCDC_IRQ_LOADED_PALETTE (1 << 4) |
| 67 | #define OMAP_LCDC_IRQ_LINE_NIRQ (1 << 5) |
| 68 | #define OMAP_LCDC_IRQ_LINE (1 << 6) |
| 69 | #define OMAP_LCDC_IRQ_MASK (((1 << 5) - 1) << 2) |
| 70 | |
| 71 | #define MAX_PALETTE_SIZE PAGE_SIZE |
| 72 | |
| 73 | enum lcdc_load_mode { |
| 74 | OMAP_LCDC_LOAD_PALETTE, |
| 75 | OMAP_LCDC_LOAD_FRAME, |
| 76 | OMAP_LCDC_LOAD_PALETTE_AND_FRAME |
| 77 | }; |
| 78 | |
| 79 | static struct omap_lcd_controller { |
| 80 | enum omapfb_update_mode update_mode; |
| 81 | int ext_mode; |
| 82 | |
| 83 | unsigned long frame_offset; |
| 84 | int screen_width; |
| 85 | int xres; |
| 86 | int yres; |
| 87 | |
| 88 | enum omapfb_color_format color_mode; |
| 89 | int bpp; |
| 90 | void *palette_virt; |
| 91 | dma_addr_t palette_phys; |
| 92 | int palette_code; |
| 93 | int palette_size; |
| 94 | |
| 95 | unsigned int irq_mask; |
| 96 | struct completion last_frame_complete; |
| 97 | struct completion palette_load_complete; |
| 98 | struct clk *lcd_ck; |
| 99 | struct omapfb_device *fbdev; |
| 100 | |
| 101 | void (*dma_callback)(void *data); |
| 102 | void *dma_callback_data; |
| 103 | |
| 104 | int fbmem_allocated; |
| 105 | dma_addr_t vram_phys; |
| 106 | void *vram_virt; |
| 107 | unsigned long vram_size; |
| 108 | } lcdc; |
| 109 | |
| 110 | static void inline enable_irqs(int mask) |
| 111 | { |
| 112 | lcdc.irq_mask |= mask; |
| 113 | } |
| 114 | |
| 115 | static void inline disable_irqs(int mask) |
| 116 | { |
| 117 | lcdc.irq_mask &= ~mask; |
| 118 | } |
| 119 | |
| 120 | static void set_load_mode(enum lcdc_load_mode mode) |
| 121 | { |
| 122 | u32 l; |
| 123 | |
| 124 | l = omap_readl(OMAP_LCDC_CONTROL); |
| 125 | l &= ~(3 << 20); |
| 126 | switch (mode) { |
| 127 | case OMAP_LCDC_LOAD_PALETTE: |
| 128 | l |= 1 << 20; |
| 129 | break; |
| 130 | case OMAP_LCDC_LOAD_FRAME: |
| 131 | l |= 2 << 20; |
| 132 | break; |
| 133 | case OMAP_LCDC_LOAD_PALETTE_AND_FRAME: |
| 134 | break; |
| 135 | default: |
| 136 | BUG(); |
| 137 | } |
| 138 | omap_writel(l, OMAP_LCDC_CONTROL); |
| 139 | } |
| 140 | |
| 141 | static void enable_controller(void) |
| 142 | { |
| 143 | u32 l; |
| 144 | |
| 145 | l = omap_readl(OMAP_LCDC_CONTROL); |
| 146 | l |= OMAP_LCDC_CTRL_LCD_EN; |
| 147 | l &= ~OMAP_LCDC_IRQ_MASK; |
| 148 | l |= lcdc.irq_mask | OMAP_LCDC_IRQ_DONE; /* enabled IRQs */ |
| 149 | omap_writel(l, OMAP_LCDC_CONTROL); |
| 150 | } |
| 151 | |
| 152 | static void disable_controller_async(void) |
| 153 | { |
| 154 | u32 l; |
| 155 | u32 mask; |
| 156 | |
| 157 | l = omap_readl(OMAP_LCDC_CONTROL); |
| 158 | mask = OMAP_LCDC_CTRL_LCD_EN | OMAP_LCDC_IRQ_MASK; |
| 159 | /* |
| 160 | * Preserve the DONE mask, since we still want to get the |
| 161 | * final DONE irq. It will be disabled in the IRQ handler. |
| 162 | */ |
| 163 | mask &= ~OMAP_LCDC_IRQ_DONE; |
| 164 | l &= ~mask; |
| 165 | omap_writel(l, OMAP_LCDC_CONTROL); |
| 166 | } |
| 167 | |
| 168 | static void disable_controller(void) |
| 169 | { |
| 170 | init_completion(&lcdc.last_frame_complete); |
| 171 | disable_controller_async(); |
| 172 | if (!wait_for_completion_timeout(&lcdc.last_frame_complete, |
| 173 | msecs_to_jiffies(500))) |
| 174 | dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n"); |
| 175 | } |
| 176 | |
| 177 | static void reset_controller(u32 status) |
| 178 | { |
| 179 | static unsigned long reset_count; |
| 180 | static unsigned long last_jiffies; |
| 181 | |
| 182 | disable_controller_async(); |
| 183 | reset_count++; |
| 184 | if (reset_count == 1 || time_after(jiffies, last_jiffies + HZ)) { |
| 185 | dev_err(lcdc.fbdev->dev, |
| 186 | "resetting (status %#010x,reset count %lu)\n", |
| 187 | status, reset_count); |
| 188 | last_jiffies = jiffies; |
| 189 | } |
| 190 | if (reset_count < 100) { |
| 191 | enable_controller(); |
| 192 | } else { |
| 193 | reset_count = 0; |
| 194 | dev_err(lcdc.fbdev->dev, |
| 195 | "too many reset attempts, giving up.\n"); |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | /* |
| 200 | * Configure the LCD DMA according to the current mode specified by parameters |
| 201 | * in lcdc.fbdev and fbdev->var. |
| 202 | */ |
| 203 | static void setup_lcd_dma(void) |
| 204 | { |
| 205 | static const int dma_elem_type[] = { |
| 206 | 0, |
| 207 | OMAP_DMA_DATA_TYPE_S8, |
| 208 | OMAP_DMA_DATA_TYPE_S16, |
| 209 | 0, |
| 210 | OMAP_DMA_DATA_TYPE_S32, |
| 211 | }; |
| 212 | struct omapfb_plane_struct *plane = lcdc.fbdev->fb_info[0]->par; |
| 213 | struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var; |
| 214 | unsigned long src; |
| 215 | int esize, xelem, yelem; |
| 216 | |
| 217 | src = lcdc.vram_phys + lcdc.frame_offset; |
| 218 | |
| 219 | switch (var->rotate) { |
| 220 | case 0: |
| 221 | if (plane->info.mirror || (src & 3) || |
| 222 | lcdc.color_mode == OMAPFB_COLOR_YUV420 || |
| 223 | (lcdc.xres & 1)) |
| 224 | esize = 2; |
| 225 | else |
| 226 | esize = 4; |
| 227 | xelem = lcdc.xres * lcdc.bpp / 8 / esize; |
| 228 | yelem = lcdc.yres; |
| 229 | break; |
| 230 | case 90: |
| 231 | case 180: |
| 232 | case 270: |
| 233 | if (cpu_is_omap15xx()) { |
| 234 | BUG(); |
| 235 | } |
| 236 | esize = 2; |
| 237 | xelem = lcdc.yres * lcdc.bpp / 16; |
| 238 | yelem = lcdc.xres; |
| 239 | break; |
| 240 | default: |
| 241 | BUG(); |
| 242 | return; |
| 243 | } |
| 244 | #ifdef VERBOSE |
| 245 | dev_dbg(lcdc.fbdev->dev, |
| 246 | "setup_dma: src %#010lx esize %d xelem %d yelem %d\n", |
| 247 | src, esize, xelem, yelem); |
| 248 | #endif |
| 249 | omap_set_lcd_dma_b1(src, xelem, yelem, dma_elem_type[esize]); |
| 250 | if (!cpu_is_omap15xx()) { |
| 251 | int bpp = lcdc.bpp; |
| 252 | |
| 253 | /* |
| 254 | * YUV support is only for external mode when we have the |
| 255 | * YUV window embedded in a 16bpp frame buffer. |
| 256 | */ |
| 257 | if (lcdc.color_mode == OMAPFB_COLOR_YUV420) |
| 258 | bpp = 16; |
| 259 | /* Set virtual xres elem size */ |
| 260 | omap_set_lcd_dma_b1_vxres( |
| 261 | lcdc.screen_width * bpp / 8 / esize); |
| 262 | /* Setup transformations */ |
| 263 | omap_set_lcd_dma_b1_rotation(var->rotate); |
| 264 | omap_set_lcd_dma_b1_mirror(plane->info.mirror); |
| 265 | } |
| 266 | omap_setup_lcd_dma(); |
| 267 | } |
| 268 | |
| 269 | static irqreturn_t lcdc_irq_handler(int irq, void *dev_id) |
| 270 | { |
| 271 | u32 status; |
| 272 | |
| 273 | status = omap_readl(OMAP_LCDC_STATUS); |
| 274 | |
| 275 | if (status & (OMAP_LCDC_STAT_FUF | OMAP_LCDC_STAT_SYNC_LOST)) |
| 276 | reset_controller(status); |
| 277 | else { |
| 278 | if (status & OMAP_LCDC_STAT_DONE) { |
| 279 | u32 l; |
| 280 | |
| 281 | /* |
| 282 | * Disable IRQ_DONE. The status bit will be cleared |
| 283 | * only when the controller is reenabled and we don't |
| 284 | * want to get more interrupts. |
| 285 | */ |
| 286 | l = omap_readl(OMAP_LCDC_CONTROL); |
| 287 | l &= ~OMAP_LCDC_IRQ_DONE; |
| 288 | omap_writel(l, OMAP_LCDC_CONTROL); |
| 289 | complete(&lcdc.last_frame_complete); |
| 290 | } |
| 291 | if (status & OMAP_LCDC_STAT_LOADED_PALETTE) { |
| 292 | disable_controller_async(); |
| 293 | complete(&lcdc.palette_load_complete); |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | /* |
| 298 | * Clear these interrupt status bits. |
| 299 | * Sync_lost, FUF bits were cleared by disabling the LCD controller |
| 300 | * LOADED_PALETTE can be cleared this way only in palette only |
| 301 | * load mode. In other load modes it's cleared by disabling the |
| 302 | * controller. |
| 303 | */ |
| 304 | status &= ~(OMAP_LCDC_STAT_VSYNC | |
| 305 | OMAP_LCDC_STAT_LOADED_PALETTE | |
| 306 | OMAP_LCDC_STAT_ABC | |
| 307 | OMAP_LCDC_STAT_LINE_INT); |
| 308 | omap_writel(status, OMAP_LCDC_STATUS); |
| 309 | return IRQ_HANDLED; |
| 310 | } |
| 311 | |
| 312 | /* |
| 313 | * Change to a new video mode. We defer this to a later time to avoid any |
| 314 | * flicker and not to mess up the current LCD DMA context. For this we disable |
| 315 | * the LCD controler, which will generate a DONE irq after the last frame has |
| 316 | * been transferred. Then it'll be safe to reconfigure both the LCD controller |
| 317 | * as well as the LCD DMA. |
| 318 | */ |
| 319 | static int omap_lcdc_setup_plane(int plane, int channel_out, |
| 320 | unsigned long offset, int screen_width, |
| 321 | int pos_x, int pos_y, int width, int height, |
| 322 | int color_mode) |
| 323 | { |
| 324 | struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var; |
| 325 | struct lcd_panel *panel = lcdc.fbdev->panel; |
| 326 | int rot_x, rot_y; |
| 327 | |
| 328 | if (var->rotate == 0) { |
| 329 | rot_x = panel->x_res; |
| 330 | rot_y = panel->y_res; |
| 331 | } else { |
| 332 | rot_x = panel->y_res; |
| 333 | rot_y = panel->x_res; |
| 334 | } |
| 335 | if (plane != 0 || channel_out != 0 || pos_x != 0 || pos_y != 0 || |
| 336 | width > rot_x || height > rot_y) { |
| 337 | #ifdef VERBOSE |
| 338 | dev_dbg(lcdc.fbdev->dev, |
| 339 | "invalid plane params plane %d pos_x %d pos_y %d " |
| 340 | "w %d h %d\n", plane, pos_x, pos_y, width, height); |
| 341 | #endif |
| 342 | return -EINVAL; |
| 343 | } |
| 344 | |
| 345 | lcdc.frame_offset = offset; |
| 346 | lcdc.xres = width; |
| 347 | lcdc.yres = height; |
| 348 | lcdc.screen_width = screen_width; |
| 349 | lcdc.color_mode = color_mode; |
| 350 | |
| 351 | switch (color_mode) { |
| 352 | case OMAPFB_COLOR_CLUT_8BPP: |
| 353 | lcdc.bpp = 8; |
| 354 | lcdc.palette_code = 0x3000; |
| 355 | lcdc.palette_size = 512; |
| 356 | break; |
| 357 | case OMAPFB_COLOR_RGB565: |
| 358 | lcdc.bpp = 16; |
| 359 | lcdc.palette_code = 0x4000; |
| 360 | lcdc.palette_size = 32; |
| 361 | break; |
| 362 | case OMAPFB_COLOR_RGB444: |
| 363 | lcdc.bpp = 16; |
| 364 | lcdc.palette_code = 0x4000; |
| 365 | lcdc.palette_size = 32; |
| 366 | break; |
| 367 | case OMAPFB_COLOR_YUV420: |
| 368 | if (lcdc.ext_mode) { |
| 369 | lcdc.bpp = 12; |
| 370 | break; |
| 371 | } |
| 372 | /* fallthrough */ |
| 373 | case OMAPFB_COLOR_YUV422: |
| 374 | if (lcdc.ext_mode) { |
| 375 | lcdc.bpp = 16; |
| 376 | break; |
| 377 | } |
| 378 | /* fallthrough */ |
| 379 | default: |
| 380 | /* FIXME: other BPPs. |
| 381 | * bpp1: code 0, size 256 |
| 382 | * bpp2: code 0x1000 size 256 |
| 383 | * bpp4: code 0x2000 size 256 |
| 384 | * bpp12: code 0x4000 size 32 |
| 385 | */ |
| 386 | dev_dbg(lcdc.fbdev->dev, "invalid color mode %d\n", color_mode); |
| 387 | BUG(); |
| 388 | return -1; |
| 389 | } |
| 390 | |
| 391 | if (lcdc.ext_mode) { |
| 392 | setup_lcd_dma(); |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { |
| 397 | disable_controller(); |
| 398 | omap_stop_lcd_dma(); |
| 399 | setup_lcd_dma(); |
| 400 | enable_controller(); |
| 401 | } |
| 402 | |
| 403 | return 0; |
| 404 | } |
| 405 | |
| 406 | static int omap_lcdc_enable_plane(int plane, int enable) |
| 407 | { |
| 408 | dev_dbg(lcdc.fbdev->dev, |
| 409 | "plane %d enable %d update_mode %d ext_mode %d\n", |
| 410 | plane, enable, lcdc.update_mode, lcdc.ext_mode); |
| 411 | if (plane != OMAPFB_PLANE_GFX) |
| 412 | return -EINVAL; |
| 413 | |
| 414 | return 0; |
| 415 | } |
| 416 | |
| 417 | /* |
| 418 | * Configure the LCD DMA for a palette load operation and do the palette |
| 419 | * downloading synchronously. We don't use the frame+palette load mode of |
| 420 | * the controller, since the palette can always be downloaded seperately. |
| 421 | */ |
| 422 | static void load_palette(void) |
| 423 | { |
| 424 | u16 *palette; |
| 425 | |
| 426 | palette = (u16 *)lcdc.palette_virt; |
| 427 | |
| 428 | *(u16 *)palette &= 0x0fff; |
| 429 | *(u16 *)palette |= lcdc.palette_code; |
| 430 | |
| 431 | omap_set_lcd_dma_b1(lcdc.palette_phys, |
| 432 | lcdc.palette_size / 4 + 1, 1, OMAP_DMA_DATA_TYPE_S32); |
| 433 | |
| 434 | omap_set_lcd_dma_single_transfer(1); |
| 435 | omap_setup_lcd_dma(); |
| 436 | |
| 437 | init_completion(&lcdc.palette_load_complete); |
| 438 | enable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE); |
| 439 | set_load_mode(OMAP_LCDC_LOAD_PALETTE); |
| 440 | enable_controller(); |
| 441 | if (!wait_for_completion_timeout(&lcdc.palette_load_complete, |
| 442 | msecs_to_jiffies(500))) |
| 443 | dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n"); |
| 444 | /* The controller gets disabled in the irq handler */ |
| 445 | disable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE); |
| 446 | omap_stop_lcd_dma(); |
| 447 | |
| 448 | omap_set_lcd_dma_single_transfer(lcdc.ext_mode); |
| 449 | } |
| 450 | |
| 451 | /* Used only in internal controller mode */ |
| 452 | static int omap_lcdc_setcolreg(u_int regno, u16 red, u16 green, u16 blue, |
| 453 | u16 transp, int update_hw_pal) |
| 454 | { |
| 455 | u16 *palette; |
| 456 | |
| 457 | if (lcdc.color_mode != OMAPFB_COLOR_CLUT_8BPP || regno > 255) |
| 458 | return -EINVAL; |
| 459 | |
| 460 | palette = (u16 *)lcdc.palette_virt; |
| 461 | |
| 462 | palette[regno] &= ~0x0fff; |
| 463 | palette[regno] |= ((red >> 12) << 8) | ((green >> 12) << 4 ) | |
| 464 | (blue >> 12); |
| 465 | |
| 466 | if (update_hw_pal) { |
| 467 | disable_controller(); |
| 468 | omap_stop_lcd_dma(); |
| 469 | load_palette(); |
| 470 | setup_lcd_dma(); |
| 471 | set_load_mode(OMAP_LCDC_LOAD_FRAME); |
| 472 | enable_controller(); |
| 473 | } |
| 474 | |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | static void calc_ck_div(int is_tft, int pck, int *pck_div) |
| 479 | { |
| 480 | unsigned long lck; |
| 481 | |
| 482 | pck = max(1, pck); |
| 483 | lck = clk_get_rate(lcdc.lcd_ck); |
| 484 | *pck_div = (lck + pck - 1) / pck; |
| 485 | if (is_tft) |
| 486 | *pck_div = max(2, *pck_div); |
| 487 | else |
| 488 | *pck_div = max(3, *pck_div); |
| 489 | if (*pck_div > 255) { |
| 490 | /* FIXME: try to adjust logic clock divider as well */ |
| 491 | *pck_div = 255; |
| 492 | dev_warn(lcdc.fbdev->dev, "pixclock %d kHz too low.\n", |
| 493 | pck / 1000); |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | static void inline setup_regs(void) |
| 498 | { |
| 499 | u32 l; |
| 500 | struct lcd_panel *panel = lcdc.fbdev->panel; |
| 501 | int is_tft = panel->config & OMAP_LCDC_PANEL_TFT; |
| 502 | unsigned long lck; |
| 503 | int pcd; |
| 504 | |
| 505 | l = omap_readl(OMAP_LCDC_CONTROL); |
| 506 | l &= ~OMAP_LCDC_CTRL_LCD_TFT; |
| 507 | l |= is_tft ? OMAP_LCDC_CTRL_LCD_TFT : 0; |
| 508 | #ifdef CONFIG_MACH_OMAP_PALMTE |
| 509 | /* FIXME:if (machine_is_omap_palmte()) { */ |
| 510 | /* PalmTE uses alternate TFT setting in 8BPP mode */ |
| 511 | l |= (is_tft && panel->bpp == 8) ? 0x810000 : 0; |
| 512 | /* } */ |
| 513 | #endif |
| 514 | omap_writel(l, OMAP_LCDC_CONTROL); |
| 515 | |
| 516 | l = omap_readl(OMAP_LCDC_TIMING2); |
| 517 | l &= ~(((1 << 6) - 1) << 20); |
| 518 | l |= (panel->config & OMAP_LCDC_SIGNAL_MASK) << 20; |
| 519 | omap_writel(l, OMAP_LCDC_TIMING2); |
| 520 | |
| 521 | l = panel->x_res - 1; |
| 522 | l |= (panel->hsw - 1) << 10; |
| 523 | l |= (panel->hfp - 1) << 16; |
| 524 | l |= (panel->hbp - 1) << 24; |
| 525 | omap_writel(l, OMAP_LCDC_TIMING0); |
| 526 | |
| 527 | l = panel->y_res - 1; |
| 528 | l |= (panel->vsw - 1) << 10; |
| 529 | l |= panel->vfp << 16; |
| 530 | l |= panel->vbp << 24; |
| 531 | omap_writel(l, OMAP_LCDC_TIMING1); |
| 532 | |
| 533 | l = omap_readl(OMAP_LCDC_TIMING2); |
| 534 | l &= ~0xff; |
| 535 | |
| 536 | lck = clk_get_rate(lcdc.lcd_ck); |
| 537 | |
| 538 | if (!panel->pcd) |
| 539 | calc_ck_div(is_tft, panel->pixel_clock * 1000, &pcd); |
| 540 | else { |
| 541 | dev_warn(lcdc.fbdev->dev, |
| 542 | "Pixel clock divider value is obsolete.\n" |
| 543 | "Try to set pixel_clock to %lu and pcd to 0 " |
| 544 | "in drivers/video/omap/lcd_%s.c and submit a patch.\n", |
| 545 | lck / panel->pcd / 1000, panel->name); |
| 546 | |
| 547 | pcd = panel->pcd; |
| 548 | } |
| 549 | l |= pcd & 0xff; |
| 550 | l |= panel->acb << 8; |
| 551 | omap_writel(l, OMAP_LCDC_TIMING2); |
| 552 | |
| 553 | /* update panel info with the exact clock */ |
| 554 | panel->pixel_clock = lck / pcd / 1000; |
| 555 | } |
| 556 | |
| 557 | /* |
| 558 | * Configure the LCD controller, download the color palette and start a looped |
| 559 | * DMA transfer of the frame image data. Called only in internal |
| 560 | * controller mode. |
| 561 | */ |
| 562 | static int omap_lcdc_set_update_mode(enum omapfb_update_mode mode) |
| 563 | { |
| 564 | int r = 0; |
| 565 | |
| 566 | if (mode != lcdc.update_mode) { |
| 567 | switch (mode) { |
| 568 | case OMAPFB_AUTO_UPDATE: |
| 569 | setup_regs(); |
| 570 | load_palette(); |
| 571 | |
| 572 | /* Setup and start LCD DMA */ |
| 573 | setup_lcd_dma(); |
| 574 | |
| 575 | set_load_mode(OMAP_LCDC_LOAD_FRAME); |
| 576 | enable_irqs(OMAP_LCDC_IRQ_DONE); |
| 577 | /* This will start the actual DMA transfer */ |
| 578 | enable_controller(); |
| 579 | lcdc.update_mode = mode; |
| 580 | break; |
| 581 | case OMAPFB_UPDATE_DISABLED: |
| 582 | disable_controller(); |
| 583 | omap_stop_lcd_dma(); |
| 584 | lcdc.update_mode = mode; |
| 585 | break; |
| 586 | default: |
| 587 | r = -EINVAL; |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | return r; |
| 592 | } |
| 593 | |
| 594 | static enum omapfb_update_mode omap_lcdc_get_update_mode(void) |
| 595 | { |
| 596 | return lcdc.update_mode; |
| 597 | } |
| 598 | |
| 599 | /* PM code called only in internal controller mode */ |
| 600 | static void omap_lcdc_suspend(void) |
| 601 | { |
| 602 | if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { |
| 603 | disable_controller(); |
| 604 | omap_stop_lcd_dma(); |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | static void omap_lcdc_resume(void) |
| 609 | { |
| 610 | if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { |
| 611 | setup_regs(); |
| 612 | load_palette(); |
| 613 | setup_lcd_dma(); |
| 614 | set_load_mode(OMAP_LCDC_LOAD_FRAME); |
| 615 | enable_irqs(OMAP_LCDC_IRQ_DONE); |
| 616 | enable_controller(); |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | static void omap_lcdc_get_caps(int plane, struct omapfb_caps *caps) |
| 621 | { |
| 622 | return; |
| 623 | } |
| 624 | |
| 625 | int omap_lcdc_set_dma_callback(void (*callback)(void *data), void *data) |
| 626 | { |
| 627 | BUG_ON(callback == NULL); |
| 628 | |
| 629 | if (lcdc.dma_callback) |
| 630 | return -EBUSY; |
| 631 | else { |
| 632 | lcdc.dma_callback = callback; |
| 633 | lcdc.dma_callback_data = data; |
| 634 | } |
| 635 | return 0; |
| 636 | } |
| 637 | EXPORT_SYMBOL(omap_lcdc_set_dma_callback); |
| 638 | |
| 639 | void omap_lcdc_free_dma_callback(void) |
| 640 | { |
| 641 | lcdc.dma_callback = NULL; |
| 642 | } |
| 643 | EXPORT_SYMBOL(omap_lcdc_free_dma_callback); |
| 644 | |
| 645 | static void lcdc_dma_handler(u16 status, void *data) |
| 646 | { |
| 647 | if (lcdc.dma_callback) |
| 648 | lcdc.dma_callback(lcdc.dma_callback_data); |
| 649 | } |
| 650 | |
| 651 | static int mmap_kern(void) |
| 652 | { |
| 653 | struct vm_struct *kvma; |
| 654 | struct vm_area_struct vma; |
| 655 | pgprot_t pgprot; |
| 656 | unsigned long vaddr; |
| 657 | |
| 658 | kvma = get_vm_area(lcdc.vram_size, VM_IOREMAP); |
| 659 | if (kvma == NULL) { |
| 660 | dev_err(lcdc.fbdev->dev, "can't get kernel vm area\n"); |
| 661 | return -ENOMEM; |
| 662 | } |
| 663 | vma.vm_mm = &init_mm; |
| 664 | |
| 665 | vaddr = (unsigned long)kvma->addr; |
| 666 | vma.vm_start = vaddr; |
| 667 | vma.vm_end = vaddr + lcdc.vram_size; |
| 668 | |
| 669 | pgprot = pgprot_writecombine(pgprot_kernel); |
| 670 | if (io_remap_pfn_range(&vma, vaddr, |
| 671 | lcdc.vram_phys >> PAGE_SHIFT, |
| 672 | lcdc.vram_size, pgprot) < 0) { |
| 673 | dev_err(lcdc.fbdev->dev, "kernel mmap for FB memory failed\n"); |
| 674 | return -EAGAIN; |
| 675 | } |
| 676 | |
| 677 | lcdc.vram_virt = (void *)vaddr; |
| 678 | |
| 679 | return 0; |
| 680 | } |
| 681 | |
| 682 | static void unmap_kern(void) |
| 683 | { |
| 684 | vunmap(lcdc.vram_virt); |
| 685 | } |
| 686 | |
| 687 | static int alloc_palette_ram(void) |
| 688 | { |
| 689 | lcdc.palette_virt = dma_alloc_writecombine(lcdc.fbdev->dev, |
| 690 | MAX_PALETTE_SIZE, &lcdc.palette_phys, GFP_KERNEL); |
| 691 | if (lcdc.palette_virt == NULL) { |
| 692 | dev_err(lcdc.fbdev->dev, "failed to alloc palette memory\n"); |
| 693 | return -ENOMEM; |
| 694 | } |
| 695 | memset(lcdc.palette_virt, 0, MAX_PALETTE_SIZE); |
| 696 | |
| 697 | return 0; |
| 698 | } |
| 699 | |
| 700 | static void free_palette_ram(void) |
| 701 | { |
| 702 | dma_free_writecombine(lcdc.fbdev->dev, MAX_PALETTE_SIZE, |
| 703 | lcdc.palette_virt, lcdc.palette_phys); |
| 704 | } |
| 705 | |
| 706 | static int alloc_fbmem(struct omapfb_mem_region *region) |
| 707 | { |
| 708 | int bpp; |
| 709 | int frame_size; |
| 710 | struct lcd_panel *panel = lcdc.fbdev->panel; |
| 711 | |
| 712 | bpp = panel->bpp; |
| 713 | if (bpp == 12) |
| 714 | bpp = 16; |
| 715 | frame_size = PAGE_ALIGN(panel->x_res * bpp / 8 * panel->y_res); |
| 716 | if (region->size > frame_size) |
| 717 | frame_size = region->size; |
| 718 | lcdc.vram_size = frame_size; |
| 719 | lcdc.vram_virt = dma_alloc_writecombine(lcdc.fbdev->dev, |
| 720 | lcdc.vram_size, &lcdc.vram_phys, GFP_KERNEL); |
| 721 | if (lcdc.vram_virt == NULL) { |
| 722 | dev_err(lcdc.fbdev->dev, "unable to allocate FB DMA memory\n"); |
| 723 | return -ENOMEM; |
| 724 | } |
| 725 | region->size = frame_size; |
| 726 | region->paddr = lcdc.vram_phys; |
| 727 | region->vaddr = lcdc.vram_virt; |
| 728 | region->alloc = 1; |
| 729 | |
| 730 | memset(lcdc.vram_virt, 0, lcdc.vram_size); |
| 731 | |
| 732 | return 0; |
| 733 | } |
| 734 | |
| 735 | static void free_fbmem(void) |
| 736 | { |
| 737 | dma_free_writecombine(lcdc.fbdev->dev, lcdc.vram_size, |
| 738 | lcdc.vram_virt, lcdc.vram_phys); |
| 739 | } |
| 740 | |
| 741 | static int setup_fbmem(struct omapfb_mem_desc *req_md) |
| 742 | { |
| 743 | int r; |
| 744 | |
| 745 | if (!req_md->region_cnt) { |
| 746 | dev_err(lcdc.fbdev->dev, "no memory regions defined\n"); |
| 747 | return -EINVAL; |
| 748 | } |
| 749 | |
| 750 | if (req_md->region_cnt > 1) { |
| 751 | dev_err(lcdc.fbdev->dev, "only one plane is supported\n"); |
| 752 | req_md->region_cnt = 1; |
| 753 | } |
| 754 | |
| 755 | if (req_md->region[0].paddr == 0) { |
| 756 | lcdc.fbmem_allocated = 1; |
| 757 | if ((r = alloc_fbmem(&req_md->region[0])) < 0) |
| 758 | return r; |
| 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | lcdc.vram_phys = req_md->region[0].paddr; |
| 763 | lcdc.vram_size = req_md->region[0].size; |
| 764 | |
| 765 | if ((r = mmap_kern()) < 0) |
| 766 | return r; |
| 767 | |
| 768 | dev_dbg(lcdc.fbdev->dev, "vram at %08x size %08lx mapped to 0x%p\n", |
| 769 | lcdc.vram_phys, lcdc.vram_size, lcdc.vram_virt); |
| 770 | |
| 771 | return 0; |
| 772 | } |
| 773 | |
| 774 | static void cleanup_fbmem(void) |
| 775 | { |
| 776 | if (lcdc.fbmem_allocated) |
| 777 | free_fbmem(); |
| 778 | else |
| 779 | unmap_kern(); |
| 780 | } |
| 781 | |
| 782 | static int omap_lcdc_init(struct omapfb_device *fbdev, int ext_mode, |
| 783 | struct omapfb_mem_desc *req_vram) |
| 784 | { |
| 785 | int r; |
| 786 | u32 l; |
| 787 | int rate; |
| 788 | struct clk *tc_ck; |
| 789 | |
| 790 | lcdc.irq_mask = 0; |
| 791 | |
| 792 | lcdc.fbdev = fbdev; |
| 793 | lcdc.ext_mode = ext_mode; |
| 794 | |
| 795 | l = 0; |
| 796 | omap_writel(l, OMAP_LCDC_CONTROL); |
| 797 | |
| 798 | /* FIXME: |
| 799 | * According to errata some platforms have a clock rate limitiation |
| 800 | */ |
| 801 | lcdc.lcd_ck = clk_get(NULL, "lcd_ck"); |
| 802 | if (IS_ERR(lcdc.lcd_ck)) { |
| 803 | dev_err(fbdev->dev, "unable to access LCD clock\n"); |
| 804 | r = PTR_ERR(lcdc.lcd_ck); |
| 805 | goto fail0; |
| 806 | } |
| 807 | |
| 808 | tc_ck = clk_get(NULL, "tc_ck"); |
| 809 | if (IS_ERR(tc_ck)) { |
| 810 | dev_err(fbdev->dev, "unable to access TC clock\n"); |
| 811 | r = PTR_ERR(tc_ck); |
| 812 | goto fail1; |
| 813 | } |
| 814 | |
| 815 | rate = clk_get_rate(tc_ck); |
| 816 | clk_put(tc_ck); |
| 817 | |
| 818 | if (machine_is_ams_delta()) |
| 819 | rate /= 4; |
| 820 | if (machine_is_omap_h3()) |
| 821 | rate /= 3; |
| 822 | r = clk_set_rate(lcdc.lcd_ck, rate); |
| 823 | if (r) { |
| 824 | dev_err(fbdev->dev, "failed to adjust LCD rate\n"); |
| 825 | goto fail1; |
| 826 | } |
| 827 | clk_enable(lcdc.lcd_ck); |
| 828 | |
| 829 | r = request_irq(OMAP_LCDC_IRQ, lcdc_irq_handler, 0, MODULE_NAME, fbdev); |
| 830 | if (r) { |
| 831 | dev_err(fbdev->dev, "unable to get IRQ\n"); |
| 832 | goto fail2; |
| 833 | } |
| 834 | |
| 835 | r = omap_request_lcd_dma(lcdc_dma_handler, NULL); |
| 836 | if (r) { |
| 837 | dev_err(fbdev->dev, "unable to get LCD DMA\n"); |
| 838 | goto fail3; |
| 839 | } |
| 840 | |
| 841 | omap_set_lcd_dma_single_transfer(ext_mode); |
| 842 | omap_set_lcd_dma_ext_controller(ext_mode); |
| 843 | |
| 844 | if (!ext_mode) |
| 845 | if ((r = alloc_palette_ram()) < 0) |
| 846 | goto fail4; |
| 847 | |
| 848 | if ((r = setup_fbmem(req_vram)) < 0) |
| 849 | goto fail5; |
| 850 | |
| 851 | pr_info("omapfb: LCDC initialized\n"); |
| 852 | |
| 853 | return 0; |
| 854 | fail5: |
| 855 | if (!ext_mode) |
| 856 | free_palette_ram(); |
| 857 | fail4: |
| 858 | omap_free_lcd_dma(); |
| 859 | fail3: |
| 860 | free_irq(OMAP_LCDC_IRQ, lcdc.fbdev); |
| 861 | fail2: |
| 862 | clk_disable(lcdc.lcd_ck); |
| 863 | fail1: |
| 864 | clk_put(lcdc.lcd_ck); |
| 865 | fail0: |
| 866 | return r; |
| 867 | } |
| 868 | |
| 869 | static void omap_lcdc_cleanup(void) |
| 870 | { |
| 871 | if (!lcdc.ext_mode) |
| 872 | free_palette_ram(); |
| 873 | cleanup_fbmem(); |
| 874 | omap_free_lcd_dma(); |
| 875 | free_irq(OMAP_LCDC_IRQ, lcdc.fbdev); |
| 876 | clk_disable(lcdc.lcd_ck); |
| 877 | clk_put(lcdc.lcd_ck); |
| 878 | } |
| 879 | |
| 880 | const struct lcd_ctrl omap1_int_ctrl = { |
| 881 | .name = "internal", |
| 882 | .init = omap_lcdc_init, |
| 883 | .cleanup = omap_lcdc_cleanup, |
| 884 | .get_caps = omap_lcdc_get_caps, |
| 885 | .set_update_mode = omap_lcdc_set_update_mode, |
| 886 | .get_update_mode = omap_lcdc_get_update_mode, |
| 887 | .update_window = NULL, |
| 888 | .suspend = omap_lcdc_suspend, |
| 889 | .resume = omap_lcdc_resume, |
| 890 | .setup_plane = omap_lcdc_setup_plane, |
| 891 | .enable_plane = omap_lcdc_enable_plane, |
| 892 | .setcolreg = omap_lcdc_setcolreg, |
| 893 | }; |