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>

1 files changed, 880 insertions, 0 deletions

diff --git a/drivers/usb/renesas_usbhs/pipe.c b/drivers/usb/renesas_usbhs/pipe.c
new file mode 100644
index 000000000000..b7a9137f599b
--- /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);
+}