usb: renesas_usbhs: Add Renesas USBHS common code
Renesas SuperH has USBHS IP which can switch Host / Function.
This driver is designed so that Host / Function may dynamically change.
This patch add usb/renesas_usbhs and common code for SuperH USBHS.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/renesas_usbhs/pipe.c b/drivers/usb/renesas_usbhs/pipe.c
new file mode 100644
index 0000000..b7a9137
--- /dev/null
+++ b/drivers/usb/renesas_usbhs/pipe.c
@@ -0,0 +1,880 @@
+/*
+ * Renesas USB driver
+ *
+ * Copyright (C) 2011 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include "./common.h"
+#include "./pipe.h"
+
+/*
+ * macros
+ */
+#define usbhsp_priv_to_pipeinfo(pr) (&(pr)->pipe_info)
+#define usbhsp_pipe_to_priv(p) ((p)->priv)
+
+#define usbhsp_addr_offset(p) ((usbhs_pipe_number(p) - 1) * 2)
+
+#define usbhsp_is_dcp(p) ((p)->priv->pipe_info.pipe == (p))
+
+#define usbhsp_flags_set(p, f) ((p)->flags |= USBHS_PIPE_FLAGS_##f)
+#define usbhsp_flags_clr(p, f) ((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
+#define usbhsp_flags_has(p, f) ((p)->flags & USBHS_PIPE_FLAGS_##f)
+#define usbhsp_flags_init(p) do {(p)->flags = 0; } while (0)
+
+#define usbhsp_type(p) ((p)->pipe_type)
+#define usbhsp_type_is(p, t) ((p)->pipe_type == t)
+
+/*
+ * for debug
+ */
+static char *usbhsp_pipe_name[] = {
+ [USB_ENDPOINT_XFER_CONTROL] = "DCP",
+ [USB_ENDPOINT_XFER_BULK] = "BULK",
+ [USB_ENDPOINT_XFER_INT] = "INT",
+ [USB_ENDPOINT_XFER_ISOC] = "ISO",
+};
+
+/*
+ * usb request functions
+ */
+void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
+{
+ u16 val;
+
+ val = usbhs_read(priv, USBREQ);
+ req->bRequest = (val >> 8) & 0xFF;
+ req->bRequestType = (val >> 0) & 0xFF;
+
+ req->wValue = usbhs_read(priv, USBVAL);
+ req->wIndex = usbhs_read(priv, USBINDX);
+ req->wLength = usbhs_read(priv, USBLENG);
+}
+
+void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
+{
+ usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
+ usbhs_write(priv, USBVAL, req->wValue);
+ usbhs_write(priv, USBINDX, req->wIndex);
+ usbhs_write(priv, USBLENG, req->wLength);
+}
+
+/*
+ * DCPCTR/PIPEnCTR functions
+ */
+static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+ int offset = usbhsp_addr_offset(pipe);
+
+ if (usbhsp_is_dcp(pipe))
+ usbhs_bset(priv, DCPCTR, mask, val);
+ else
+ usbhs_bset(priv, PIPEnCTR + offset, mask, val);
+}
+
+static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+ int offset = usbhsp_addr_offset(pipe);
+
+ if (usbhsp_is_dcp(pipe))
+ return usbhs_read(priv, DCPCTR);
+ else
+ return usbhs_read(priv, PIPEnCTR + offset);
+}
+
+/*
+ * DCP/PIPE functions
+ */
+static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
+ u16 dcp_reg, u16 pipe_reg,
+ u16 mask, u16 val)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+
+ if (usbhsp_is_dcp(pipe))
+ usbhs_bset(priv, dcp_reg, mask, val);
+ else
+ usbhs_bset(priv, pipe_reg, mask, val);
+}
+
+static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
+ u16 dcp_reg, u16 pipe_reg)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+
+ if (usbhsp_is_dcp(pipe))
+ return usbhs_read(priv, dcp_reg);
+ else
+ return usbhs_read(priv, pipe_reg);
+}
+
+/*
+ * DCPCFG/PIPECFG functions
+ */
+static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
+{
+ __usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
+}
+
+/*
+ * PIPEBUF
+ */
+static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
+{
+ if (usbhsp_is_dcp(pipe))
+ return;
+
+ __usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
+}
+
+/*
+ * DCPMAXP/PIPEMAXP
+ */
+static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
+{
+ __usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
+}
+
+static u16 usbhsp_pipe_maxp_get(struct usbhs_pipe *pipe)
+{
+ return __usbhsp_pipe_xxx_get(pipe, DCPMAXP, PIPEMAXP);
+}
+
+/*
+ * pipe control functions
+ */
+static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+
+ /*
+ * On pipe, this is necessary before
+ * accesses to below registers.
+ *
+ * PIPESEL : usbhsp_pipe_select
+ * PIPECFG : usbhsp_pipe_cfg_xxx
+ * PIPEBUF : usbhsp_pipe_buf_xxx
+ * PIPEMAXP : usbhsp_pipe_maxp_xxx
+ * PIPEPERI
+ */
+
+ /*
+ * if pipe is dcp, no pipe is selected.
+ * it is no problem, because dcp have its register
+ */
+ usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
+}
+
+static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int timeout = 1024;
+ u16 val;
+
+ /*
+ * make sure....
+ *
+ * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
+ * specified by the CURPIPE bits.
+ * When changing the setting of this bit after changing
+ * the PID bits for the selected pipe from BUF to NAK,
+ * check that CSSTS = 0 and PBUSY = 0.
+ */
+
+ /*
+ * CURPIPE bit = 0
+ *
+ * see also
+ * "Operation"
+ * - "Pipe Control"
+ * - "Pipe Control Registers Switching Procedure"
+ */
+ usbhs_write(priv, CFIFOSEL, 0);
+
+ do {
+ val = usbhsp_pipectrl_get(pipe);
+ val &= CSSTS | PID_MASK;
+ if (!val)
+ return 0;
+
+ udelay(10);
+
+ } while (timeout--);
+
+ /*
+ * force NAK
+ */
+ timeout = 1024;
+ usbhs_fifo_disable(pipe);
+ do {
+ val = usbhsp_pipectrl_get(pipe);
+ val &= PBUSY;
+ if (!val)
+ return 0;
+
+ } while (timeout--);
+
+ dev_err(dev, "pipe barrier failed\n");
+
+ return -EBUSY;
+}
+
+static int usbhsp_pipe_is_accessible(struct usbhs_pipe *pipe)
+{
+ u16 val;
+
+ val = usbhsp_pipectrl_get(pipe);
+ if (val & BSTS)
+ return 0;
+
+ return -EBUSY;
+}
+
+/*
+ * PID ctrl
+ */
+static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
+{
+ u16 pid = usbhsp_pipectrl_get(pipe);
+
+ pid &= PID_MASK;
+
+ /*
+ * see
+ * "Pipe n Control Register" - "PID"
+ */
+ switch (pid) {
+ case PID_STALL11:
+ usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
+ /* fall-through */
+ case PID_STALL10:
+ usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
+ }
+}
+
+void usbhs_fifo_disable(struct usbhs_pipe *pipe)
+{
+ /* see "Pipe n Control Register" - "PID" */
+ __usbhsp_pid_try_nak_if_stall(pipe);
+
+ usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
+}
+
+void usbhs_fifo_enable(struct usbhs_pipe *pipe)
+{
+ /* see "Pipe n Control Register" - "PID" */
+ __usbhsp_pid_try_nak_if_stall(pipe);
+
+ usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
+}
+
+void usbhs_fifo_stall(struct usbhs_pipe *pipe)
+{
+ u16 pid = usbhsp_pipectrl_get(pipe);
+
+ pid &= PID_MASK;
+
+ /*
+ * see
+ * "Pipe n Control Register" - "PID"
+ */
+ switch (pid) {
+ case PID_NAK:
+ usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
+ break;
+ case PID_BUF:
+ usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
+ break;
+ }
+}
+
+/*
+ * CFIFO ctrl
+ */
+void usbhs_fifo_send_terminator(struct usbhs_pipe *pipe)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+
+ usbhs_bset(priv, CFIFOCTR, BVAL, BVAL);
+}
+
+static void usbhsp_fifo_clear(struct usbhs_pipe *pipe)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+
+ usbhs_write(priv, CFIFOCTR, BCLR);
+}
+
+static int usbhsp_fifo_barrier(struct usbhs_priv *priv)
+{
+ int timeout = 1024;
+
+ do {
+ /* The FIFO port is accessible */
+ if (usbhs_read(priv, CFIFOCTR) & FRDY)
+ return 0;
+
+ udelay(10);
+ } while (timeout--);
+
+ return -EBUSY;
+}
+
+static int usbhsp_fifo_rcv_len(struct usbhs_priv *priv)
+{
+ return usbhs_read(priv, CFIFOCTR) & DTLN_MASK;
+}
+
+static int usbhsp_fifo_select(struct usbhs_pipe *pipe, int write)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int timeout = 1024;
+ u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */
+ u16 base = usbhs_pipe_number(pipe); /* CURPIPE */
+
+ if (usbhsp_is_dcp(pipe))
+ base |= (1 == write) << 5; /* ISEL */
+
+ /* "base" will be used below */
+ usbhs_write(priv, CFIFOSEL, base | MBW_32);
+
+ /* check ISEL and CURPIPE value */
+ while (timeout--) {
+ if (base == (mask & usbhs_read(priv, CFIFOSEL)))
+ return 0;
+ udelay(10);
+ }
+
+ dev_err(dev, "fifo select error\n");
+
+ return -EIO;
+}
+
+int usbhs_fifo_prepare_write(struct usbhs_pipe *pipe)
+{
+ int ret;
+
+ ret = usbhsp_fifo_select(pipe, 1);
+ if (ret < 0)
+ return ret;
+
+ usbhsp_fifo_clear(pipe);
+
+ return ret;
+}
+
+int usbhs_fifo_write(struct usbhs_pipe *pipe, u8 *buf, int len)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+ void __iomem *addr = priv->base + CFIFO;
+ int maxp = usbhs_pipe_get_maxpacket(pipe);
+ int total_len;
+ int i, ret;
+
+ ret = usbhsp_pipe_is_accessible(pipe);
+ if (ret < 0)
+ return ret;
+
+ ret = usbhs_fifo_prepare_write(pipe);
+ if (ret < 0)
+ return ret;
+
+ ret = usbhsp_fifo_barrier(priv);
+ if (ret < 0)
+ return ret;
+
+ len = min(len, maxp);
+ total_len = len;
+
+ /*
+ * FIXME
+ *
+ * 32-bit access only
+ */
+ if (len >= 4 &&
+ !((unsigned long)buf & 0x03)) {
+ iowrite32_rep(addr, buf, len / 4);
+ len %= 4;
+ buf += total_len - len;
+ }
+
+ /* the rest operation */
+ for (i = 0; i < len; i++)
+ iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
+
+ if (total_len < maxp)
+ usbhs_fifo_send_terminator(pipe);
+
+ return total_len;
+}
+
+int usbhs_fifo_prepare_read(struct usbhs_pipe *pipe)
+{
+ int ret;
+
+ /*
+ * select pipe and enable it to prepare packet receive
+ */
+ ret = usbhsp_fifo_select(pipe, 0);
+ if (ret < 0)
+ return ret;
+
+ usbhs_fifo_enable(pipe);
+
+ return ret;
+}
+
+int usbhs_fifo_read(struct usbhs_pipe *pipe, u8 *buf, int len)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+ void __iomem *addr = priv->base + CFIFO;
+ int rcv_len;
+ int i, ret;
+ int total_len;
+ u32 data = 0;
+
+ ret = usbhsp_fifo_select(pipe, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = usbhsp_fifo_barrier(priv);
+ if (ret < 0)
+ return ret;
+
+ rcv_len = usbhsp_fifo_rcv_len(priv);
+
+ /*
+ * Buffer clear if Zero-Length packet
+ *
+ * see
+ * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
+ */
+ if (0 == rcv_len) {
+ usbhsp_fifo_clear(pipe);
+ return 0;
+ }
+
+ len = min(rcv_len, len);
+ total_len = len;
+
+ /*
+ * FIXME
+ *
+ * 32-bit access only
+ */
+ if (len >= 4 &&
+ !((unsigned long)buf & 0x03)) {
+ ioread32_rep(addr, buf, len / 4);
+ len %= 4;
+ buf += rcv_len - len;
+ }
+
+ /* the rest operation */
+ for (i = 0; i < len; i++) {
+ if (!(i & 0x03))
+ data = ioread32(addr);
+
+ buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
+ }
+
+ return total_len;
+}
+
+/*
+ * pipe setup
+ */
+static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
+{
+ /*
+ * only ISO / BULK pipe can use double buffer
+ */
+ if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
+ usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
+ return 1;
+
+ return 0;
+}
+
+static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
+ const struct usb_endpoint_descriptor *desc,
+ int is_host)
+{
+ u16 type = 0;
+ u16 bfre = 0;
+ u16 dblb = 0;
+ u16 cntmd = 0;
+ u16 dir = 0;
+ u16 epnum = 0;
+ u16 shtnak = 0;
+ u16 type_array[] = {
+ [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
+ [USB_ENDPOINT_XFER_INT] = TYPE_INT,
+ [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
+ };
+ int is_double = usbhsp_possible_double_buffer(pipe);
+
+ if (usbhsp_is_dcp(pipe))
+ return -EINVAL;
+
+ /*
+ * PIPECFG
+ *
+ * see
+ * - "Register Descriptions" - "PIPECFG" register
+ * - "Features" - "Pipe configuration"
+ * - "Operation" - "Pipe Control"
+ */
+
+ /* TYPE */
+ type = type_array[usbhsp_type(pipe)];
+
+ /* BFRE */
+ if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
+ usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
+ bfre = 0; /* FIXME */
+
+ /* DBLB */
+ if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
+ usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
+ dblb = (is_double) ? DBLB : 0;
+
+ /* CNTMD */
+ if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
+ cntmd = 0; /* FIXME */
+
+ /* DIR */
+ if (usb_endpoint_dir_in(desc))
+ usbhsp_flags_set(pipe, IS_DIR_IN);
+
+ if ((is_host && usb_endpoint_dir_out(desc)) ||
+ (!is_host && usb_endpoint_dir_in(desc)))
+ dir |= DIR_OUT;
+
+ /* SHTNAK */
+ if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
+ !dir)
+ shtnak = SHTNAK;
+
+ /* EPNUM */
+ epnum = 0xF & usb_endpoint_num(desc);
+
+ return type |
+ bfre |
+ dblb |
+ cntmd |
+ dir |
+ shtnak |
+ epnum;
+}
+
+static u16 usbhsp_setup_pipemaxp(struct usbhs_pipe *pipe,
+ const struct usb_endpoint_descriptor *desc,
+ int is_host)
+{
+ /* host should set DEVSEL */
+
+ /* reutn MXPS */
+ return PIPE_MAXP_MASK & le16_to_cpu(desc->wMaxPacketSize);
+}
+
+static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe,
+ const struct usb_endpoint_descriptor *desc,
+ int is_host)
+{
+ struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
+ struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int pipe_num = usbhs_pipe_number(pipe);
+ int is_double = usbhsp_possible_double_buffer(pipe);
+ u16 buff_size;
+ u16 bufnmb;
+ u16 bufnmb_cnt;
+
+ /*
+ * PIPEBUF
+ *
+ * see
+ * - "Register Descriptions" - "PIPEBUF" register
+ * - "Features" - "Pipe configuration"
+ * - "Operation" - "FIFO Buffer Memory"
+ * - "Operation" - "Pipe Control"
+ *
+ * ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)
+ *
+ * BUFNMB: PIPE
+ * 0: pipe0 (DCP 256byte)
+ * 1: -
+ * 2: -
+ * 3: -
+ * 4: pipe6 (INT 64byte)
+ * 5: pipe7 (INT 64byte)
+ * 6: pipe8 (INT 64byte)
+ * 7: pipe9 (INT 64byte)
+ * 8 - xx: free (for BULK, ISOC)
+ */
+
+ /*
+ * FIXME
+ *
+ * it doesn't have good buffer allocator
+ *
+ * DCP : 256 byte
+ * BULK: 512 byte
+ * INT : 64 byte
+ * ISOC: 512 byte
+ */
+ if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))
+ buff_size = 256;
+ else if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
+ buff_size = 64;
+ else
+ buff_size = 512;
+
+ /* change buff_size to register value */
+ bufnmb_cnt = (buff_size / 64) - 1;
+
+ /* BUFNMB has been reserved for INT pipe
+ * see above */
+ if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT)) {
+ bufnmb = pipe_num - 2;
+ } else {
+ bufnmb = info->bufnmb_last;
+ info->bufnmb_last += bufnmb_cnt + 1;
+
+ /*
+ * double buffer
+ */
+ if (is_double)
+ info->bufnmb_last += bufnmb_cnt + 1;
+ }
+
+ dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
+ pipe_num, buff_size, bufnmb);
+
+ return (0x1f & bufnmb_cnt) << 10 |
+ (0xff & bufnmb) << 0;
+}
+
+/*
+ * pipe control
+ */
+int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
+{
+ u16 mask = usbhsp_is_dcp(pipe) ? DCP_MAXP_MASK : PIPE_MAXP_MASK;
+
+ usbhsp_pipe_select(pipe);
+
+ return (int)(usbhsp_pipe_maxp_get(pipe) & mask);
+}
+
+int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
+{
+ return usbhsp_flags_has(pipe, IS_DIR_IN);
+}
+
+void usbhs_pipe_clear_sequence(struct usbhs_pipe *pipe)
+{
+ usbhsp_pipectrl_set(pipe, SQCLR, SQCLR);
+}
+
+static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
+{
+ struct usbhs_pipe *pos, *pipe;
+ int i;
+
+ /*
+ * find target pipe
+ */
+ pipe = NULL;
+ usbhs_for_each_pipe_with_dcp(pos, priv, i) {
+ if (!usbhsp_type_is(pos, type))
+ continue;
+ if (usbhsp_flags_has(pos, IS_USED))
+ continue;
+
+ pipe = pos;
+ break;
+ }
+
+ if (!pipe)
+ return NULL;
+
+ /*
+ * initialize pipe flags
+ */
+ usbhsp_flags_init(pipe);
+ usbhsp_flags_set(pipe, IS_USED);
+
+ return pipe;
+}
+
+void usbhs_pipe_init(struct usbhs_priv *priv)
+{
+ struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
+ struct usbhs_pipe *pipe;
+ int i;
+
+ /*
+ * FIXME
+ *
+ * driver needs good allocator.
+ *
+ * find first free buffer area (BULK, ISOC)
+ * (DCP, INT area is fixed)
+ *
+ * buffer number 0 - 3 have been reserved for DCP
+ * see
+ * usbhsp_to_bufnmb
+ */
+ info->bufnmb_last = 4;
+ usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
+ if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
+ info->bufnmb_last++;
+
+ usbhsp_flags_init(pipe);
+ pipe->mod_private = NULL;
+ }
+}
+
+struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct device *dev = usbhs_priv_to_dev(priv);
+ struct usbhs_mod *mod = usbhs_mod_get_current(priv);
+ struct usbhs_pipe *pipe;
+ int is_host = usbhs_mod_is_host(priv, mod);
+ int ret;
+ u16 pipecfg, pipebuf, pipemaxp;
+
+ pipe = usbhsp_get_pipe(priv, usb_endpoint_type(desc));
+ if (!pipe)
+ return NULL;
+
+ usbhs_fifo_disable(pipe);
+
+ /* make sure pipe is not busy */
+ ret = usbhsp_pipe_barrier(pipe);
+ if (ret < 0) {
+ dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
+ return NULL;
+ }
+
+ pipecfg = usbhsp_setup_pipecfg(pipe, desc, is_host);
+ pipebuf = usbhsp_setup_pipebuff(pipe, desc, is_host);
+ pipemaxp = usbhsp_setup_pipemaxp(pipe, desc, is_host);
+
+ /* buffer clear
+ * see PIPECFG :: BFRE */
+ usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
+ usbhsp_pipectrl_set(pipe, ACLRM, 0);
+
+ usbhsp_pipe_select(pipe);
+ usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
+ usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
+ usbhsp_pipe_maxp_set(pipe, 0xFFFF, pipemaxp);
+
+ usbhs_pipe_clear_sequence(pipe);
+
+ dev_dbg(dev, "enable pipe %d : %s (%s)\n",
+ usbhs_pipe_number(pipe),
+ usbhsp_pipe_name[usb_endpoint_type(desc)],
+ usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
+
+ return pipe;
+}
+
+/*
+ * dcp control
+ */
+struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
+{
+ struct usbhs_pipe *pipe;
+
+ pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
+ if (!pipe)
+ return NULL;
+
+ /*
+ * dcpcfg : default
+ * dcpmaxp : default
+ * pipebuf : nothing to do
+ */
+
+ usbhsp_pipe_select(pipe);
+ usbhs_pipe_clear_sequence(pipe);
+
+ return pipe;
+}
+
+void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
+{
+ WARN_ON(!usbhsp_is_dcp(pipe));
+
+ usbhs_fifo_enable(pipe);
+ usbhsp_pipectrl_set(pipe, CCPL, CCPL);
+}
+
+
+/*
+ * pipe module function
+ */
+int usbhs_pipe_probe(struct usbhs_priv *priv)
+{
+ struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
+ struct usbhs_pipe *pipe;
+ struct device *dev = usbhs_priv_to_dev(priv);
+ u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
+ int pipe_size = usbhs_get_dparam(priv, pipe_size);
+ int i;
+
+ /* This driver expects 1st pipe is DCP */
+ if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {
+ dev_err(dev, "1st PIPE is not DCP\n");
+ return -EINVAL;
+ }
+
+ info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
+ if (!info->pipe) {
+ dev_err(dev, "Could not allocate pipe\n");
+ return -ENOMEM;
+ }
+
+ info->size = pipe_size;
+
+ /*
+ * init pipe
+ */
+ usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
+ pipe->priv = priv;
+ usbhsp_type(pipe) = pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;
+
+ dev_dbg(dev, "pipe %x\t: %s\n",
+ i, usbhsp_pipe_name[pipe_type[i]]);
+ }
+
+ return 0;
+}
+
+void usbhs_pipe_remove(struct usbhs_priv *priv)
+{
+ struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
+
+ kfree(info->pipe);
+}
