summaryrefslogtreecommitdiffstats
path: root/drivers/usb/gadget/r8a66597-udc.c
diff options
context:
space:
mode:
authorAndrzej Pietrasiewicz <andrzej.p@samsung.com>2014-07-15 13:09:45 +0200
committerFelipe Balbi <balbi@ti.com>2014-07-16 19:15:28 +0200
commit90fccb529d241b55829701cfb9eb3086570f38b8 (patch)
tree4e788b13b8c35bc5c9d24597479cda82d503bf7c /drivers/usb/gadget/r8a66597-udc.c
parentusb: gadget: Gadget directory cleanup - group legacy gadgets (diff)
downloadlinux-90fccb529d241b55829701cfb9eb3086570f38b8.tar.xz
linux-90fccb529d241b55829701cfb9eb3086570f38b8.zip
usb: gadget: Gadget directory cleanup - group UDC drivers
The drivers/usb/gadget directory contains many files. Files which are related can be distributed into separate directories. This patch moves the UDC drivers into a separate directory. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget/r8a66597-udc.c')
-rw-r--r--drivers/usb/gadget/r8a66597-udc.c1993
1 files changed, 0 insertions, 1993 deletions
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
deleted file mode 100644
index 46008421c1ec..000000000000
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ /dev/null
@@ -1,1993 +0,0 @@
-/*
- * R8A66597 UDC (USB gadget)
- *
- * Copyright (C) 2006-2009 Renesas Solutions Corp.
- *
- * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- */
-
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-#include <linux/dma-mapping.h>
-
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-
-#include "r8a66597-udc.h"
-
-#define DRIVER_VERSION "2011-09-26"
-
-static const char udc_name[] = "r8a66597_udc";
-static const char *r8a66597_ep_name[] = {
- "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7",
- "ep8", "ep9",
-};
-
-static void init_controller(struct r8a66597 *r8a66597);
-static void disable_controller(struct r8a66597 *r8a66597);
-static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req);
-static void irq_packet_write(struct r8a66597_ep *ep,
- struct r8a66597_request *req);
-static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
- gfp_t gfp_flags);
-
-static void transfer_complete(struct r8a66597_ep *ep,
- struct r8a66597_request *req, int status);
-
-/*-------------------------------------------------------------------------*/
-static inline u16 get_usb_speed(struct r8a66597 *r8a66597)
-{
- return r8a66597_read(r8a66597, DVSTCTR0) & RHST;
-}
-
-static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
- unsigned long reg)
-{
- u16 tmp;
-
- tmp = r8a66597_read(r8a66597, INTENB0);
- r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE,
- INTENB0);
- r8a66597_bset(r8a66597, (1 << pipenum), reg);
- r8a66597_write(r8a66597, tmp, INTENB0);
-}
-
-static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
- unsigned long reg)
-{
- u16 tmp;
-
- tmp = r8a66597_read(r8a66597, INTENB0);
- r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE,
- INTENB0);
- r8a66597_bclr(r8a66597, (1 << pipenum), reg);
- r8a66597_write(r8a66597, tmp, INTENB0);
-}
-
-static void r8a66597_usb_connect(struct r8a66597 *r8a66597)
-{
- r8a66597_bset(r8a66597, CTRE, INTENB0);
- r8a66597_bset(r8a66597, BEMPE | BRDYE, INTENB0);
-
- r8a66597_bset(r8a66597, DPRPU, SYSCFG0);
-}
-
-static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597)
-__releases(r8a66597->lock)
-__acquires(r8a66597->lock)
-{
- r8a66597_bclr(r8a66597, CTRE, INTENB0);
- r8a66597_bclr(r8a66597, BEMPE | BRDYE, INTENB0);
- r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
-
- r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
- spin_unlock(&r8a66597->lock);
- r8a66597->driver->disconnect(&r8a66597->gadget);
- spin_lock(&r8a66597->lock);
-
- disable_controller(r8a66597);
- init_controller(r8a66597);
- r8a66597_bset(r8a66597, VBSE, INTENB0);
- INIT_LIST_HEAD(&r8a66597->ep[0].queue);
-}
-
-static inline u16 control_reg_get_pid(struct r8a66597 *r8a66597, u16 pipenum)
-{
- u16 pid = 0;
- unsigned long offset;
-
- if (pipenum == 0) {
- pid = r8a66597_read(r8a66597, DCPCTR) & PID;
- } else if (pipenum < R8A66597_MAX_NUM_PIPE) {
- offset = get_pipectr_addr(pipenum);
- pid = r8a66597_read(r8a66597, offset) & PID;
- } else {
- dev_err(r8a66597_to_dev(r8a66597), "unexpect pipe num (%d)\n",
- pipenum);
- }
-
- return pid;
-}
-
-static inline void control_reg_set_pid(struct r8a66597 *r8a66597, u16 pipenum,
- u16 pid)
-{
- unsigned long offset;
-
- if (pipenum == 0) {
- r8a66597_mdfy(r8a66597, pid, PID, DCPCTR);
- } else if (pipenum < R8A66597_MAX_NUM_PIPE) {
- offset = get_pipectr_addr(pipenum);
- r8a66597_mdfy(r8a66597, pid, PID, offset);
- } else {
- dev_err(r8a66597_to_dev(r8a66597), "unexpect pipe num (%d)\n",
- pipenum);
- }
-}
-
-static inline void pipe_start(struct r8a66597 *r8a66597, u16 pipenum)
-{
- control_reg_set_pid(r8a66597, pipenum, PID_BUF);
-}
-
-static inline void pipe_stop(struct r8a66597 *r8a66597, u16 pipenum)
-{
- control_reg_set_pid(r8a66597, pipenum, PID_NAK);
-}
-
-static inline void pipe_stall(struct r8a66597 *r8a66597, u16 pipenum)
-{
- control_reg_set_pid(r8a66597, pipenum, PID_STALL);
-}
-
-static inline u16 control_reg_get(struct r8a66597 *r8a66597, u16 pipenum)
-{
- u16 ret = 0;
- unsigned long offset;
-
- if (pipenum == 0) {
- ret = r8a66597_read(r8a66597, DCPCTR);
- } else if (pipenum < R8A66597_MAX_NUM_PIPE) {
- offset = get_pipectr_addr(pipenum);
- ret = r8a66597_read(r8a66597, offset);
- } else {
- dev_err(r8a66597_to_dev(r8a66597), "unexpect pipe num (%d)\n",
- pipenum);
- }
-
- return ret;
-}
-
-static inline void control_reg_sqclr(struct r8a66597 *r8a66597, u16 pipenum)
-{
- unsigned long offset;
-
- pipe_stop(r8a66597, pipenum);
-
- if (pipenum == 0) {
- r8a66597_bset(r8a66597, SQCLR, DCPCTR);
- } else if (pipenum < R8A66597_MAX_NUM_PIPE) {
- offset = get_pipectr_addr(pipenum);
- r8a66597_bset(r8a66597, SQCLR, offset);
- } else {
- dev_err(r8a66597_to_dev(r8a66597), "unexpect pipe num (%d)\n",
- pipenum);
- }
-}
-
-static void control_reg_sqset(struct r8a66597 *r8a66597, u16 pipenum)
-{
- unsigned long offset;
-
- pipe_stop(r8a66597, pipenum);
-
- if (pipenum == 0) {
- r8a66597_bset(r8a66597, SQSET, DCPCTR);
- } else if (pipenum < R8A66597_MAX_NUM_PIPE) {
- offset = get_pipectr_addr(pipenum);
- r8a66597_bset(r8a66597, SQSET, offset);
- } else {
- dev_err(r8a66597_to_dev(r8a66597),
- "unexpect pipe num(%d)\n", pipenum);
- }
-}
-
-static u16 control_reg_sqmon(struct r8a66597 *r8a66597, u16 pipenum)
-{
- unsigned long offset;
-
- if (pipenum == 0) {
- return r8a66597_read(r8a66597, DCPCTR) & SQMON;
- } else if (pipenum < R8A66597_MAX_NUM_PIPE) {
- offset = get_pipectr_addr(pipenum);
- return r8a66597_read(r8a66597, offset) & SQMON;
- } else {
- dev_err(r8a66597_to_dev(r8a66597),
- "unexpect pipe num(%d)\n", pipenum);
- }
-
- return 0;
-}
-
-static u16 save_usb_toggle(struct r8a66597 *r8a66597, u16 pipenum)
-{
- return control_reg_sqmon(r8a66597, pipenum);
-}
-
-static void restore_usb_toggle(struct r8a66597 *r8a66597, u16 pipenum,
- u16 toggle)
-{
- if (toggle)
- control_reg_sqset(r8a66597, pipenum);
- else
- control_reg_sqclr(r8a66597, pipenum);
-}
-
-static inline int get_buffer_size(struct r8a66597 *r8a66597, u16 pipenum)
-{
- u16 tmp;
- int size;
-
- if (pipenum == 0) {
- tmp = r8a66597_read(r8a66597, DCPCFG);
- if ((tmp & R8A66597_CNTMD) != 0)
- size = 256;
- else {
- tmp = r8a66597_read(r8a66597, DCPMAXP);
- size = tmp & MAXP;
- }
- } else {
- r8a66597_write(r8a66597, pipenum, PIPESEL);
- tmp = r8a66597_read(r8a66597, PIPECFG);
- if ((tmp & R8A66597_CNTMD) != 0) {
- tmp = r8a66597_read(r8a66597, PIPEBUF);
- size = ((tmp >> 10) + 1) * 64;
- } else {
- tmp = r8a66597_read(r8a66597, PIPEMAXP);
- size = tmp & MXPS;
- }
- }
-
- return size;
-}
-
-static inline unsigned short mbw_value(struct r8a66597 *r8a66597)
-{
- if (r8a66597->pdata->on_chip)
- return MBW_32;
- else
- return MBW_16;
-}
-
-static void r8a66597_change_curpipe(struct r8a66597 *r8a66597, u16 pipenum,
- u16 isel, u16 fifosel)
-{
- u16 tmp, mask, loop;
- int i = 0;
-
- if (!pipenum) {
- mask = ISEL | CURPIPE;
- loop = isel;
- } else {
- mask = CURPIPE;
- loop = pipenum;
- }
- r8a66597_mdfy(r8a66597, loop, mask, fifosel);
-
- do {
- tmp = r8a66597_read(r8a66597, fifosel);
- if (i++ > 1000000) {
- dev_err(r8a66597_to_dev(r8a66597),
- "r8a66597: register%x, loop %x "
- "is timeout\n", fifosel, loop);
- break;
- }
- ndelay(1);
- } while ((tmp & mask) != loop);
-}
-
-static inline void pipe_change(struct r8a66597 *r8a66597, u16 pipenum)
-{
- struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum];
-
- if (ep->use_dma)
- r8a66597_bclr(r8a66597, DREQE, ep->fifosel);
-
- r8a66597_mdfy(r8a66597, pipenum, CURPIPE, ep->fifosel);
-
- ndelay(450);
-
- if (r8a66597_is_sudmac(r8a66597) && ep->use_dma)
- r8a66597_bclr(r8a66597, mbw_value(r8a66597), ep->fifosel);
- else
- r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
-
- if (ep->use_dma)
- r8a66597_bset(r8a66597, DREQE, ep->fifosel);
-}
-
-static int pipe_buffer_setting(struct r8a66597 *r8a66597,
- struct r8a66597_pipe_info *info)
-{
- u16 bufnum = 0, buf_bsize = 0;
- u16 pipecfg = 0;
-
- if (info->pipe == 0)
- return -EINVAL;
-
- r8a66597_write(r8a66597, info->pipe, PIPESEL);
-
- if (info->dir_in)
- pipecfg |= R8A66597_DIR;
- pipecfg |= info->type;
- pipecfg |= info->epnum;
- switch (info->type) {
- case R8A66597_INT:
- bufnum = 4 + (info->pipe - R8A66597_BASE_PIPENUM_INT);
- buf_bsize = 0;
- break;
- case R8A66597_BULK:
- /* isochronous pipes may be used as bulk pipes */
- if (info->pipe >= R8A66597_BASE_PIPENUM_BULK)
- bufnum = info->pipe - R8A66597_BASE_PIPENUM_BULK;
- else
- bufnum = info->pipe - R8A66597_BASE_PIPENUM_ISOC;
-
- bufnum = R8A66597_BASE_BUFNUM + (bufnum * 16);
- buf_bsize = 7;
- pipecfg |= R8A66597_DBLB;
- if (!info->dir_in)
- pipecfg |= R8A66597_SHTNAK;
- break;
- case R8A66597_ISO:
- bufnum = R8A66597_BASE_BUFNUM +
- (info->pipe - R8A66597_BASE_PIPENUM_ISOC) * 16;
- buf_bsize = 7;
- break;
- }
-
- if (buf_bsize && ((bufnum + 16) >= R8A66597_MAX_BUFNUM)) {
- pr_err("r8a66597 pipe memory is insufficient\n");
- return -ENOMEM;
- }
-
- r8a66597_write(r8a66597, pipecfg, PIPECFG);
- r8a66597_write(r8a66597, (buf_bsize << 10) | (bufnum), PIPEBUF);
- r8a66597_write(r8a66597, info->maxpacket, PIPEMAXP);
- if (info->interval)
- info->interval--;
- r8a66597_write(r8a66597, info->interval, PIPEPERI);
-
- return 0;
-}
-
-static void pipe_buffer_release(struct r8a66597 *r8a66597,
- struct r8a66597_pipe_info *info)
-{
- if (info->pipe == 0)
- return;
-
- if (is_bulk_pipe(info->pipe)) {
- r8a66597->bulk--;
- } else if (is_interrupt_pipe(info->pipe)) {
- r8a66597->interrupt--;
- } else if (is_isoc_pipe(info->pipe)) {
- r8a66597->isochronous--;
- if (info->type == R8A66597_BULK)
- r8a66597->bulk--;
- } else {
- dev_err(r8a66597_to_dev(r8a66597),
- "ep_release: unexpect pipenum (%d)\n", info->pipe);
- }
-}
-
-static void pipe_initialize(struct r8a66597_ep *ep)
-{
- struct r8a66597 *r8a66597 = ep->r8a66597;
-
- r8a66597_mdfy(r8a66597, 0, CURPIPE, ep->fifosel);
-
- r8a66597_write(r8a66597, ACLRM, ep->pipectr);
- r8a66597_write(r8a66597, 0, ep->pipectr);
- r8a66597_write(r8a66597, SQCLR, ep->pipectr);
- if (ep->use_dma) {
- r8a66597_mdfy(r8a66597, ep->pipenum, CURPIPE, ep->fifosel);
-
- ndelay(450);
-
- r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
- }
-}
-
-static void r8a66597_ep_setting(struct r8a66597 *r8a66597,
- struct r8a66597_ep *ep,
- const struct usb_endpoint_descriptor *desc,
- u16 pipenum, int dma)
-{
- ep->use_dma = 0;
- ep->fifoaddr = CFIFO;
- ep->fifosel = CFIFOSEL;
- ep->fifoctr = CFIFOCTR;
-
- ep->pipectr = get_pipectr_addr(pipenum);
- if (is_bulk_pipe(pipenum) || is_isoc_pipe(pipenum)) {
- ep->pipetre = get_pipetre_addr(pipenum);
- ep->pipetrn = get_pipetrn_addr(pipenum);
- } else {
- ep->pipetre = 0;
- ep->pipetrn = 0;
- }
- ep->pipenum = pipenum;
- ep->ep.maxpacket = usb_endpoint_maxp(desc);
- r8a66597->pipenum2ep[pipenum] = ep;
- r8a66597->epaddr2ep[desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK]
- = ep;
- INIT_LIST_HEAD(&ep->queue);
-}
-
-static void r8a66597_ep_release(struct r8a66597_ep *ep)
-{
- struct r8a66597 *r8a66597 = ep->r8a66597;
- u16 pipenum = ep->pipenum;
-
- if (pipenum == 0)
- return;
-
- if (ep->use_dma)
- r8a66597->num_dma--;
- ep->pipenum = 0;
- ep->busy = 0;
- ep->use_dma = 0;
-}
-
-static int alloc_pipe_config(struct r8a66597_ep *ep,
- const struct usb_endpoint_descriptor *desc)
-{
- struct r8a66597 *r8a66597 = ep->r8a66597;
- struct r8a66597_pipe_info info;
- int dma = 0;
- unsigned char *counter;
- int ret;
-
- ep->ep.desc = desc;
-
- if (ep->pipenum) /* already allocated pipe */
- return 0;
-
- switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
- case USB_ENDPOINT_XFER_BULK:
- if (r8a66597->bulk >= R8A66597_MAX_NUM_BULK) {
- if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
- dev_err(r8a66597_to_dev(r8a66597),
- "bulk pipe is insufficient\n");
- return -ENODEV;
- } else {
- info.pipe = R8A66597_BASE_PIPENUM_ISOC
- + r8a66597->isochronous;
- counter = &r8a66597->isochronous;
- }
- } else {
- info.pipe = R8A66597_BASE_PIPENUM_BULK + r8a66597->bulk;
- counter = &r8a66597->bulk;
- }
- info.type = R8A66597_BULK;
- dma = 1;
- break;
- case USB_ENDPOINT_XFER_INT:
- if (r8a66597->interrupt >= R8A66597_MAX_NUM_INT) {
- dev_err(r8a66597_to_dev(r8a66597),
- "interrupt pipe is insufficient\n");
- return -ENODEV;
- }
- info.pipe = R8A66597_BASE_PIPENUM_INT + r8a66597->interrupt;
- info.type = R8A66597_INT;
- counter = &r8a66597->interrupt;
- break;
- case USB_ENDPOINT_XFER_ISOC:
- if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
- dev_err(r8a66597_to_dev(r8a66597),
- "isochronous pipe is insufficient\n");
- return -ENODEV;
- }
- info.pipe = R8A66597_BASE_PIPENUM_ISOC + r8a66597->isochronous;
- info.type = R8A66597_ISO;
- counter = &r8a66597->isochronous;
- break;
- default:
- dev_err(r8a66597_to_dev(r8a66597), "unexpect xfer type\n");
- return -EINVAL;
- }
- ep->type = info.type;
-
- info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
- info.maxpacket = usb_endpoint_maxp(desc);
- info.interval = desc->bInterval;
- if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
- info.dir_in = 1;
- else
- info.dir_in = 0;
-
- ret = pipe_buffer_setting(r8a66597, &info);
- if (ret < 0) {
- dev_err(r8a66597_to_dev(r8a66597),
- "pipe_buffer_setting fail\n");
- return ret;
- }
-
- (*counter)++;
- if ((counter == &r8a66597->isochronous) && info.type == R8A66597_BULK)
- r8a66597->bulk++;
-
- r8a66597_ep_setting(r8a66597, ep, desc, info.pipe, dma);
- pipe_initialize(ep);
-
- return 0;
-}
-
-static int free_pipe_config(struct r8a66597_ep *ep)
-{
- struct r8a66597 *r8a66597 = ep->r8a66597;
- struct r8a66597_pipe_info info;
-
- info.pipe = ep->pipenum;
- info.type = ep->type;
- pipe_buffer_release(r8a66597, &info);
- r8a66597_ep_release(ep);
-
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-static void pipe_irq_enable(struct r8a66597 *r8a66597, u16 pipenum)
-{
- enable_irq_ready(r8a66597, pipenum);
- enable_irq_nrdy(r8a66597, pipenum);
-}
-
-static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
-{
- disable_irq_ready(r8a66597, pipenum);
- disable_irq_nrdy(r8a66597, pipenum);
-}
-
-/* if complete is true, gadget driver complete function is not call */
-static void control_end(struct r8a66597 *r8a66597, unsigned ccpl)
-{
- r8a66597->ep[0].internal_ccpl = ccpl;
- pipe_start(r8a66597, 0);
- r8a66597_bset(r8a66597, CCPL, DCPCTR);
-}
-
-static void start_ep0_write(struct r8a66597_ep *ep,
- struct r8a66597_request *req)
-{
- struct r8a66597 *r8a66597 = ep->r8a66597;
-
- pipe_change(r8a66597, ep->pipenum);
- r8a66597_mdfy(r8a66597, ISEL, (ISEL | CURPIPE), CFIFOSEL);
- r8a66597_write(r8a66597, BCLR, ep->fifoctr);
- if (req->req.length == 0) {
- r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
- pipe_start(r8a66597, 0);
- transfer_complete(ep, req, 0);
- } else {
- r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
- irq_ep0_write(ep, req);
- }
-}
-
-static void disable_fifosel(struct r8a66597 *r8a66597, u16 pipenum,
- u16 fifosel)
-{
- u16 tmp;
-
- tmp = r8a66597_read(r8a66597, fifosel) & CURPIPE;
- if (tmp == pipenum)
- r8a66597_change_curpipe(r8a66597, 0, 0, fifosel);
-}
-
-static void change_bfre_mode(struct r8a66597 *r8a66597, u16 pipenum,
- int enable)
-{
- struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum];
- u16 tmp, toggle;
-
- /* check current BFRE bit */
- r8a66597_write(r8a66597, pipenum, PIPESEL);
- tmp = r8a66597_read(r8a66597, PIPECFG) & R8A66597_BFRE;
- if ((enable && tmp) || (!enable && !tmp))
- return;
-
- /* change BFRE bit */
- pipe_stop(r8a66597, pipenum);
- disable_fifosel(r8a66597, pipenum, CFIFOSEL);
- disable_fifosel(r8a66597, pipenum, D0FIFOSEL);
- disable_fifosel(r8a66597, pipenum, D1FIFOSEL);
-
- toggle = save_usb_toggle(r8a66597, pipenum);
-
- r8a66597_write(r8a66597, pipenum, PIPESEL);
- if (enable)
- r8a66597_bset(r8a66597, R8A66597_BFRE, PIPECFG);
- else
- r8a66597_bclr(r8a66597, R8A66597_BFRE, PIPECFG);
-
- /* initialize for internal BFRE flag */
- r8a66597_bset(r8a66597, ACLRM, ep->pipectr);
- r8a66597_bclr(r8a66597, ACLRM, ep->pipectr);
-
- restore_usb_toggle(r8a66597, pipenum, toggle);
-}
-
-static int sudmac_alloc_channel(struct r8a66597 *r8a66597,
- struct r8a66597_ep *ep,
- struct r8a66597_request *req)
-{
- struct r8a66597_dma *dma;
-
- if (!r8a66597_is_sudmac(r8a66597))
- return -ENODEV;
-
- /* Check transfer type */
- if (!is_bulk_pipe(ep->pipenum))
- return -EIO;
-
- if (r8a66597->dma.used)
- return -EBUSY;
-
- /* set SUDMAC parameters */
- dma = &r8a66597->dma;
- dma->used = 1;
- if (ep->ep.desc->bEndpointAddress & USB_DIR_IN) {
- dma->dir = 1;
- } else {
- dma->dir = 0;
- change_bfre_mode(r8a66597, ep->pipenum, 1);
- }
-
- /* set r8a66597_ep paramters */
- ep->use_dma = 1;
- ep->dma = dma;
- ep->fifoaddr = D0FIFO;
- ep->fifosel = D0FIFOSEL;
- ep->fifoctr = D0FIFOCTR;
-
- /* dma mapping */
- return usb_gadget_map_request(&r8a66597->gadget, &req->req, dma->dir);
-}
-
-static void sudmac_free_channel(struct r8a66597 *r8a66597,
- struct r8a66597_ep *ep,
- struct r8a66597_request *req)
-{
- if (!r8a66597_is_sudmac(r8a66597))
- return;
-
- usb_gadget_unmap_request(&r8a66597->gadget, &req->req, ep->dma->dir);
-
- r8a66597_bclr(r8a66597, DREQE, ep->fifosel);
- r8a66597_change_curpipe(r8a66597, 0, 0, ep->fifosel);
-
- ep->dma->used = 0;
- ep->use_dma = 0;
- ep->fifoaddr = CFIFO;
- ep->fifosel = CFIFOSEL;
- ep->fifoctr = CFIFOCTR;
-}
-
-static void sudmac_start(struct r8a66597 *r8a66597, struct r8a66597_ep *ep,
- struct r8a66597_request *req)
-{
- BUG_ON(req->req.length == 0);
-
- r8a66597_sudmac_write(r8a66597, LBA_WAIT, CH0CFG);
- r8a66597_sudmac_write(r8a66597, req->req.dma, CH0BA);
- r8a66597_sudmac_write(r8a66597, req->req.length, CH0BBC);
- r8a66597_sudmac_write(r8a66597, CH0ENDE, DINTCTRL);
-
- r8a66597_sudmac_write(r8a66597, DEN, CH0DEN);
-}
-
-static void start_packet_write(struct r8a66597_ep *ep,
- struct r8a66597_request *req)
-{
- struct r8a66597 *r8a66597 = ep->r8a66597;
- u16 tmp;
-
- pipe_change(r8a66597, ep->pipenum);
- disable_irq_empty(r8a66597, ep->pipenum);
- pipe_start(r8a66597, ep->pipenum);
-
- if (req->req.length == 0) {
- transfer_complete(ep, req, 0);
- } else {
- r8a66597_write(r8a66597, ~(1 << ep->pipenum), BRDYSTS);
- if (sudmac_alloc_channel(r8a66597, ep, req) < 0) {
- /* PIO mode */
- pipe_change(r8a66597, ep->pipenum);
- disable_irq_empty(r8a66597, ep->pipenum);
- pipe_start(r8a66597, ep->pipenum);
- tmp = r8a66597_read(r8a66597, ep->fifoctr);
- if (unlikely((tmp & FRDY) == 0))
- pipe_irq_enable(r8a66597, ep->pipenum);
- else
- irq_packet_write(ep, req);
- } else {
- /* DMA mode */
- pipe_change(r8a66597, ep->pipenum);
- disable_irq_nrdy(r8a66597, ep->pipenum);
- pipe_start(r8a66597, ep->pipenum);
- enable_irq_nrdy(r8a66597, ep->pipenum);
- sudmac_start(r8a66597, ep, req);
- }
- }
-}
-
-static void start_packet_read(struct r8a66597_ep *ep,
- struct r8a66597_request *req)
-{
- struct r8a66597 *r8a66597 = ep->r8a66597;
- u16 pipenum = ep->pipenum;
-
- if (ep->pipenum == 0) {
- r8a66597_mdfy(r8a66597, 0, (ISEL | CURPIPE), CFIFOSEL);
- r8a66597_write(r8a66597, BCLR, ep->fifoctr);
- pipe_start(r8a66597, pipenum);
- pipe_irq_enable(r8a66597, pipenum);
- } else {
- pipe_stop(r8a66597, pipenum);
- if (ep->pipetre) {
- enable_irq_nrdy(r8a66597, pipenum);
- r8a66597_write(r8a66597, TRCLR, ep->pipetre);
- r8a66597_write(r8a66597,
- DIV_ROUND_UP(req->req.length, ep->ep.maxpacket),
- ep->pipetrn);
- r8a66597_bset(r8a66597, TRENB, ep->pipetre);
- }
-
- if (sudmac_alloc_channel(r8a66597, ep, req) < 0) {
- /* PIO mode */
- change_bfre_mode(r8a66597, ep->pipenum, 0);
- pipe_start(r8a66597, pipenum); /* trigger once */
- pipe_irq_enable(r8a66597, pipenum);
- } else {
- pipe_change(r8a66597, pipenum);
- sudmac_start(r8a66597, ep, req);
- pipe_start(r8a66597, pipenum); /* trigger once */
- }
- }
-}
-
-static void start_packet(struct r8a66597_ep *ep, struct r8a66597_request *req)
-{
- if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
- start_packet_write(ep, req);
- else
- start_packet_read(ep, req);
-}
-
-static void start_ep0(struct r8a66597_ep *ep, struct r8a66597_request *req)
-{
- u16 ctsq;
-
- ctsq = r8a66597_read(ep->r8a66597, INTSTS0) & CTSQ;
-
- switch (ctsq) {
- case CS_RDDS:
- start_ep0_write(ep, req);
- break;
- case CS_WRDS:
- start_packet_read(ep, req);
- break;
-
- case CS_WRND:
- control_end(ep->r8a66597, 0);
- break;
- default:
- dev_err(r8a66597_to_dev(ep->r8a66597),
- "start_ep0: unexpect ctsq(%x)\n", ctsq);
- break;
- }
-}
-
-static void init_controller(struct r8a66597 *r8a66597)
-{
- u16 vif = r8a66597->pdata->vif ? LDRV : 0;
- u16 irq_sense = r8a66597->irq_sense_low ? INTL : 0;
- u16 endian = r8a66597->pdata->endian ? BIGEND : 0;
-
- if (r8a66597->pdata->on_chip) {
- if (r8a66597->pdata->buswait)
- r8a66597_write(r8a66597, r8a66597->pdata->buswait,
- SYSCFG1);
- else
- r8a66597_write(r8a66597, 0x0f, SYSCFG1);
- r8a66597_bset(r8a66597, HSE, SYSCFG0);
-
- r8a66597_bclr(r8a66597, USBE, SYSCFG0);
- r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
- r8a66597_bset(r8a66597, USBE, SYSCFG0);
-
- r8a66597_bset(r8a66597, SCKE, SYSCFG0);
-
- r8a66597_bset(r8a66597, irq_sense, INTENB1);
- r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
- DMA0CFG);
- } else {
- r8a66597_bset(r8a66597, vif | endian, PINCFG);
- r8a66597_bset(r8a66597, HSE, SYSCFG0); /* High spd */
- r8a66597_mdfy(r8a66597, get_xtal_from_pdata(r8a66597->pdata),
- XTAL, SYSCFG0);
-
- r8a66597_bclr(r8a66597, USBE, SYSCFG0);
- r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
- r8a66597_bset(r8a66597, USBE, SYSCFG0);
-
- r8a66597_bset(r8a66597, XCKE, SYSCFG0);
-
- msleep(3);
-
- r8a66597_bset(r8a66597, PLLC, SYSCFG0);
-
- msleep(1);
-
- r8a66597_bset(r8a66597, SCKE, SYSCFG0);
-
- r8a66597_bset(r8a66597, irq_sense, INTENB1);
- r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
- DMA0CFG);
- }
-}
-
-static void disable_controller(struct r8a66597 *r8a66597)
-{
- if (r8a66597->pdata->on_chip) {
- r8a66597_bset(r8a66597, SCKE, SYSCFG0);
- r8a66597_bclr(r8a66597, UTST, TESTMODE);
-
- /* disable interrupts */
- r8a66597_write(r8a66597, 0, INTENB0);
- r8a66597_write(r8a66597, 0, INTENB1);
- r8a66597_write(r8a66597, 0, BRDYENB);
- r8a66597_write(r8a66597, 0, BEMPENB);
- r8a66597_write(r8a66597, 0, NRDYENB);
-
- /* clear status */
- r8a66597_write(r8a66597, 0, BRDYSTS);
- r8a66597_write(r8a66597, 0, NRDYSTS);
- r8a66597_write(r8a66597, 0, BEMPSTS);
-
- r8a66597_bclr(r8a66597, USBE, SYSCFG0);
- r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
-
- } else {
- r8a66597_bclr(r8a66597, UTST, TESTMODE);
- r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
- udelay(1);
- r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
- udelay(1);
- udelay(1);
- r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
- }
-}
-
-static void r8a66597_start_xclock(struct r8a66597 *r8a66597)
-{
- u16 tmp;
-
- if (!r8a66597->pdata->on_chip) {
- tmp = r8a66597_read(r8a66597, SYSCFG0);
- if (!(tmp & XCKE))
- r8a66597_bset(r8a66597, XCKE, SYSCFG0);
- }
-}
-
-static struct r8a66597_request *get_request_from_ep(struct r8a66597_ep *ep)
-{
- return list_entry(ep->queue.next, struct r8a66597_request, queue);
-}
-
-/*-------------------------------------------------------------------------*/
-static void transfer_complete(struct r8a66597_ep *ep,
- struct r8a66597_request *req, int status)
-__releases(r8a66597->lock)
-__acquires(r8a66597->lock)
-{
- int restart = 0;
-
- if (unlikely(ep->pipenum == 0)) {
- if (ep->internal_ccpl) {
- ep->internal_ccpl = 0;
- return;
- }
- }
-
- list_del_init(&req->queue);
- if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
- req->req.status = -ESHUTDOWN;
- else
- req->req.status = status;
-
- if (!list_empty(&ep->queue))
- restart = 1;
-
- if (ep->use_dma)
- sudmac_free_channel(ep->r8a66597, ep, req);
-
- spin_unlock(&ep->r8a66597->lock);
- req->req.complete(&ep->ep, &req->req);
- spin_lock(&ep->r8a66597->lock);
-
- if (restart) {
- req = get_request_from_ep(ep);
- if (ep->ep.desc)
- start_packet(ep, req);
- }
-}
-
-static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req)
-{
- int i;
- u16 tmp;
- unsigned bufsize;
- size_t size;
- void *buf;
- u16 pipenum = ep->pipenum;
- struct r8a66597 *r8a66597 = ep->r8a66597;
-
- pipe_change(r8a66597, pipenum);
- r8a66597_bset(r8a66597, ISEL, ep->fifosel);
-
- i = 0;
- do {
- tmp = r8a66597_read(r8a66597, ep->fifoctr);
- if (i++ > 100000) {
- dev_err(r8a66597_to_dev(r8a66597),
- "pipe0 is busy. maybe cpu i/o bus "
- "conflict. please power off this controller.");
- return;
- }
- ndelay(1);
- } while ((tmp & FRDY) == 0);
-
- /* prepare parameters */
- bufsize = get_buffer_size(r8a66597, pipenum);
- buf = req->req.buf + req->req.actual;
- size = min(bufsize, req->req.length - req->req.actual);
-
- /* write fifo */
- if (req->req.buf) {
- if (size > 0)
- r8a66597_write_fifo(r8a66597, ep, buf, size);
- if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
- r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
- }
-
- /* update parameters */
- req->req.actual += size;
-
- /* check transfer finish */
- if ((!req->req.zero && (req->req.actual == req->req.length))
- || (size % ep->ep.maxpacket)
- || (size == 0)) {
- disable_irq_ready(r8a66597, pipenum);
- disable_irq_empty(r8a66597, pipenum);
- } else {
- disable_irq_ready(r8a66597, pipenum);
- enable_irq_empty(r8a66597, pipenum);
- }
- pipe_start(r8a66597, pipenum);
-}
-
-static void irq_packet_write(struct r8a66597_ep *ep,
- struct r8a66597_request *req)
-{
- u16 tmp;
- unsigned bufsize;
- size_t size;
- void *buf;
- u16 pipenum = ep->pipenum;
- struct r8a66597 *r8a66597 = ep->r8a66597;
-
- pipe_change(r8a66597, pipenum);
- tmp = r8a66597_read(r8a66597, ep->fifoctr);
- if (unlikely((tmp & FRDY) == 0)) {
- pipe_stop(r8a66597, pipenum);
- pipe_irq_disable(r8a66597, pipenum);
- dev_err(r8a66597_to_dev(r8a66597),
- "write fifo not ready. pipnum=%d\n", pipenum);
- return;
- }
-
- /* prepare parameters */
- bufsize = get_buffer_size(r8a66597, pipenum);
- buf = req->req.buf + req->req.actual;
- size = min(bufsize, req->req.length - req->req.actual);
-
- /* write fifo */
- if (req->req.buf) {
- r8a66597_write_fifo(r8a66597, ep, buf, size);
- if ((size == 0)
- || ((size % ep->ep.maxpacket) != 0)
- || ((bufsize != ep->ep.maxpacket)
- && (bufsize > size)))
- r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
- }
-
- /* update parameters */
- req->req.actual += size;
- /* check transfer finish */
- if ((!req->req.zero && (req->req.actual == req->req.length))
- || (size % ep->ep.maxpacket)
- || (size == 0)) {
- disable_irq_ready(r8a66597, pipenum);
- enable_irq_empty(r8a66597, pipenum);
- } else {
- disable_irq_empty(r8a66597, pipenum);
- pipe_irq_enable(r8a66597, pipenum);
- }
-}
-
-static void irq_packet_read(struct r8a66597_ep *ep,
- struct r8a66597_request *req)
-{
- u16 tmp;
- int rcv_len, bufsize, req_len;
- int size;
- void *buf;
- u16 pipenum = ep->pipenum;
- struct r8a66597 *r8a66597 = ep->r8a66597;
- int finish = 0;
-
- pipe_change(r8a66597, pipenum);
- tmp = r8a66597_read(r8a66597, ep->fifoctr);
- if (unlikely((tmp & FRDY) == 0)) {
- req->req.status = -EPIPE;
- pipe_stop(r8a66597, pipenum);
- pipe_irq_disable(r8a66597, pipenum);
- dev_err(r8a66597_to_dev(r8a66597), "read fifo not ready");
- return;
- }
-
- /* prepare parameters */
- rcv_len = tmp & DTLN;
- bufsize = get_buffer_size(r8a66597, pipenum);
-
- buf = req->req.buf + req->req.actual;
- req_len = req->req.length - req->req.actual;
- if (rcv_len < bufsize)
- size = min(rcv_len, req_len);
- else
- size = min(bufsize, req_len);
-
- /* update parameters */
- req->req.actual += size;
-
- /* check transfer finish */
- if ((!req->req.zero && (req->req.actual == req->req.length))
- || (size % ep->ep.maxpacket)
- || (size == 0)) {
- pipe_stop(r8a66597, pipenum);
- pipe_irq_disable(r8a66597, pipenum);
- finish = 1;
- }
-
- /* read fifo */
- if (req->req.buf) {
- if (size == 0)
- r8a66597_write(r8a66597, BCLR, ep->fifoctr);
- else
- r8a66597_read_fifo(r8a66597, ep->fifoaddr, buf, size);
-
- }
-
- if ((ep->pipenum != 0) && finish)
- transfer_complete(ep, req, 0);
-}
-
-static void irq_pipe_ready(struct r8a66597 *r8a66597, u16 status, u16 enb)
-{
- u16 check;
- u16 pipenum;
- struct r8a66597_ep *ep;
- struct r8a66597_request *req;
-
- if ((status & BRDY0) && (enb & BRDY0)) {
- r8a66597_write(r8a66597, ~BRDY0, BRDYSTS);
- r8a66597_mdfy(r8a66597, 0, CURPIPE, CFIFOSEL);
-
- ep = &r8a66597->ep[0];
- req = get_request_from_ep(ep);
- irq_packet_read(ep, req);
- } else {
- for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
- check = 1 << pipenum;
- if ((status & check) && (enb & check)) {
- r8a66597_write(r8a66597, ~check, BRDYSTS);
- ep = r8a66597->pipenum2ep[pipenum];
- req = get_request_from_ep(ep);
- if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
- irq_packet_write(ep, req);
- else
- irq_packet_read(ep, req);
- }
- }
- }
-}
-
-static void irq_pipe_empty(struct r8a66597 *r8a66597, u16 status, u16 enb)
-{
- u16 tmp;
- u16 check;
- u16 pipenum;
- struct r8a66597_ep *ep;
- struct r8a66597_request *req;
-
- if ((status & BEMP0) && (enb & BEMP0)) {
- r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
-
- ep = &r8a66597->ep[0];
- req = get_request_from_ep(ep);
- irq_ep0_write(ep, req);
- } else {
- for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
- check = 1 << pipenum;
- if ((status & check) && (enb & check)) {
- r8a66597_write(r8a66597, ~check, BEMPSTS);
- tmp = control_reg_get(r8a66597, pipenum);
- if ((tmp & INBUFM) == 0) {
- disable_irq_empty(r8a66597, pipenum);
- pipe_irq_disable(r8a66597, pipenum);
- pipe_stop(r8a66597, pipenum);
- ep = r8a66597->pipenum2ep[pipenum];
- req = get_request_from_ep(ep);
- if (!list_empty(&ep->queue))
- transfer_complete(ep, req, 0);
- }
- }
- }
- }
-}
-
-static void get_status(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
-__releases(r8a66597->lock)
-__acquires(r8a66597->lock)
-{
- struct r8a66597_ep *ep;
- u16 pid;
- u16 status = 0;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
-
- switch (ctrl->bRequestType & USB_RECIP_MASK) {
- case USB_RECIP_DEVICE:
- status = r8a66597->device_status;
- break;
- case USB_RECIP_INTERFACE:
- status = 0;
- break;
- case USB_RECIP_ENDPOINT:
- ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
- pid = control_reg_get_pid(r8a66597, ep->pipenum);
- if (pid == PID_STALL)
- status = 1 << USB_ENDPOINT_HALT;
- else
- status = 0;
- break;
- default:
- pipe_stall(r8a66597, 0);
- return; /* exit */
- }
-
- r8a66597->ep0_data = cpu_to_le16(status);
- r8a66597->ep0_req->buf = &r8a66597->ep0_data;
- r8a66597->ep0_req->length = 2;
- /* AV: what happens if we get called again before that gets through? */
- spin_unlock(&r8a66597->lock);
- r8a66597_queue(r8a66597->gadget.ep0, r8a66597->ep0_req, GFP_KERNEL);
- spin_lock(&r8a66597->lock);
-}
-
-static void clear_feature(struct r8a66597 *r8a66597,
- struct usb_ctrlrequest *ctrl)
-{
- switch (ctrl->bRequestType & USB_RECIP_MASK) {
- case USB_RECIP_DEVICE:
- control_end(r8a66597, 1);
- break;
- case USB_RECIP_INTERFACE:
- control_end(r8a66597, 1);
- break;
- case USB_RECIP_ENDPOINT: {
- struct r8a66597_ep *ep;
- struct r8a66597_request *req;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
-
- ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
- if (!ep->wedge) {
- pipe_stop(r8a66597, ep->pipenum);
- control_reg_sqclr(r8a66597, ep->pipenum);
- spin_unlock(&r8a66597->lock);
- usb_ep_clear_halt(&ep->ep);
- spin_lock(&r8a66597->lock);
- }
-
- control_end(r8a66597, 1);
-
- req = get_request_from_ep(ep);
- if (ep->busy) {
- ep->busy = 0;
- if (list_empty(&ep->queue))
- break;
- start_packet(ep, req);
- } else if (!list_empty(&ep->queue))
- pipe_start(r8a66597, ep->pipenum);
- }
- break;
- default:
- pipe_stall(r8a66597, 0);
- break;
- }
-}
-
-static void set_feature(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
-{
- u16 tmp;
- int timeout = 3000;
-
- switch (ctrl->bRequestType & USB_RECIP_MASK) {
- case USB_RECIP_DEVICE:
- switch (le16_to_cpu(ctrl->wValue)) {
- case USB_DEVICE_TEST_MODE:
- control_end(r8a66597, 1);
- /* Wait for the completion of status stage */
- do {
- tmp = r8a66597_read(r8a66597, INTSTS0) & CTSQ;
- udelay(1);
- } while (tmp != CS_IDST || timeout-- > 0);
-
- if (tmp == CS_IDST)
- r8a66597_bset(r8a66597,
- le16_to_cpu(ctrl->wIndex >> 8),
- TESTMODE);
- break;
- default:
- pipe_stall(r8a66597, 0);
- break;
- }
- break;
- case USB_RECIP_INTERFACE:
- control_end(r8a66597, 1);
- break;
- case USB_RECIP_ENDPOINT: {
- struct r8a66597_ep *ep;
- u16 w_index = le16_to_cpu(ctrl->wIndex);
-
- ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
- pipe_stall(r8a66597, ep->pipenum);
-
- control_end(r8a66597, 1);
- }
- break;
- default:
- pipe_stall(r8a66597, 0);
- break;
- }
-}
-
-/* if return value is true, call class driver's setup() */
-static int setup_packet(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
-{
- u16 *p = (u16 *)ctrl;
- unsigned long offset = USBREQ;
- int i, ret = 0;
-
- /* read fifo */
- r8a66597_write(r8a66597, ~VALID, INTSTS0);
-
- for (i = 0; i < 4; i++)
- p[i] = r8a66597_read(r8a66597, offset + i*2);
-
- /* check request */
- if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
- switch (ctrl->bRequest) {
- case USB_REQ_GET_STATUS:
- get_status(r8a66597, ctrl);
- break;
- case USB_REQ_CLEAR_FEATURE:
- clear_feature(r8a66597, ctrl);
- break;
- case USB_REQ_SET_FEATURE:
- set_feature(r8a66597, ctrl);
- break;
- default:
- ret = 1;
- break;
- }
- } else
- ret = 1;
- return ret;
-}
-
-static void r8a66597_update_usb_speed(struct r8a66597 *r8a66597)
-{
- u16 speed = get_usb_speed(r8a66597);
-
- switch (speed) {
- case HSMODE:
- r8a66597->gadget.speed = USB_SPEED_HIGH;
- break;
- case FSMODE:
- r8a66597->gadget.speed = USB_SPEED_FULL;
- break;
- default:
- r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
- dev_err(r8a66597_to_dev(r8a66597), "USB speed unknown\n");
- }
-}
-
-static void irq_device_state(struct r8a66597 *r8a66597)
-{
- u16 dvsq;
-
- dvsq = r8a66597_read(r8a66597, INTSTS0) & DVSQ;
- r8a66597_write(r8a66597, ~DVST, INTSTS0);
-
- if (dvsq == DS_DFLT) {
- /* bus reset */
- spin_unlock(&r8a66597->lock);
- r8a66597->driver->disconnect(&r8a66597->gadget);
- spin_lock(&r8a66597->lock);
- r8a66597_update_usb_speed(r8a66597);
- }
- if (r8a66597->old_dvsq == DS_CNFG && dvsq != DS_CNFG)
- r8a66597_update_usb_speed(r8a66597);
- if ((dvsq == DS_CNFG || dvsq == DS_ADDS)
- && r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
- r8a66597_update_usb_speed(r8a66597);
-
- r8a66597->old_dvsq = dvsq;
-}
-
-static void irq_control_stage(struct r8a66597 *r8a66597)
-__releases(r8a66597->lock)
-__acquires(r8a66597->lock)
-{
- struct usb_ctrlrequest ctrl;
- u16 ctsq;
-
- ctsq = r8a66597_read(r8a66597, INTSTS0) & CTSQ;
- r8a66597_write(r8a66597, ~CTRT, INTSTS0);
-
- switch (ctsq) {
- case CS_IDST: {
- struct r8a66597_ep *ep;
- struct r8a66597_request *req;
- ep = &r8a66597->ep[0];
- req = get_request_from_ep(ep);
- transfer_complete(ep, req, 0);
- }
- break;
-
- case CS_RDDS:
- case CS_WRDS:
- case CS_WRND:
- if (setup_packet(r8a66597, &ctrl)) {
- spin_unlock(&r8a66597->lock);
- if (r8a66597->driver->setup(&r8a66597->gadget, &ctrl)
- < 0)
- pipe_stall(r8a66597, 0);
- spin_lock(&r8a66597->lock);
- }
- break;
- case CS_RDSS:
- case CS_WRSS:
- control_end(r8a66597, 0);
- break;
- default:
- dev_err(r8a66597_to_dev(r8a66597),
- "ctrl_stage: unexpect ctsq(%x)\n", ctsq);
- break;
- }
-}
-
-static void sudmac_finish(struct r8a66597 *r8a66597, struct r8a66597_ep *ep)
-{
- u16 pipenum;
- struct r8a66597_request *req;
- u32 len;
- int i = 0;
-
- pipenum = ep->pipenum;
- pipe_change(r8a66597, pipenum);
-
- while (!(r8a66597_read(r8a66597, ep->fifoctr) & FRDY)) {
- udelay(1);
- if (unlikely(i++ >= 10000)) { /* timeout = 10 msec */
- dev_err(r8a66597_to_dev(r8a66597),
- "%s: FRDY was not set (%d)\n",
- __func__, pipenum);
- return;
- }
- }
-
- r8a66597_bset(r8a66597, BCLR, ep->fifoctr);
- req = get_request_from_ep(ep);
-
- /* prepare parameters */
- len = r8a66597_sudmac_read(r8a66597, CH0CBC);
- req->req.actual += len;
-
- /* clear */
- r8a66597_sudmac_write(r8a66597, CH0STCLR, DSTSCLR);
-
- /* check transfer finish */
- if ((!req->req.zero && (req->req.actual == req->req.length))
- || (len % ep->ep.maxpacket)) {
- if (ep->dma->dir) {
- disable_irq_ready(r8a66597, pipenum);
- enable_irq_empty(r8a66597, pipenum);
- } else {
- /* Clear the interrupt flag for next transfer */
- r8a66597_write(r8a66597, ~(1 << pipenum), BRDYSTS);
- transfer_complete(ep, req, 0);
- }
- }
-}
-
-static void r8a66597_sudmac_irq(struct r8a66597 *r8a66597)
-{
- u32 irqsts;
- struct r8a66597_ep *ep;
- u16 pipenum;
-
- irqsts = r8a66597_sudmac_read(r8a66597, DINTSTS);
- if (irqsts & CH0ENDS) {
- r8a66597_sudmac_write(r8a66597, CH0ENDC, DINTSTSCLR);
- pipenum = (r8a66597_read(r8a66597, D0FIFOSEL) & CURPIPE);
- ep = r8a66597->pipenum2ep[pipenum];
- sudmac_finish(r8a66597, ep);
- }
-}
-
-static irqreturn_t r8a66597_irq(int irq, void *_r8a66597)
-{
- struct r8a66597 *r8a66597 = _r8a66597;
- u16 intsts0;
- u16 intenb0;
- u16 brdysts, nrdysts, bempsts;
- u16 brdyenb, nrdyenb, bempenb;
- u16 savepipe;
- u16 mask0;
-
- spin_lock(&r8a66597->lock);
-
- if (r8a66597_is_sudmac(r8a66597))
- r8a66597_sudmac_irq(r8a66597);
-
- intsts0 = r8a66597_read(r8a66597, INTSTS0);
- intenb0 = r8a66597_read(r8a66597, INTENB0);
-
- savepipe = r8a66597_read(r8a66597, CFIFOSEL);
-
- mask0 = intsts0 & intenb0;
- if (mask0) {
- brdysts = r8a66597_read(r8a66597, BRDYSTS);
- nrdysts = r8a66597_read(r8a66597, NRDYSTS);
- bempsts = r8a66597_read(r8a66597, BEMPSTS);
- brdyenb = r8a66597_read(r8a66597, BRDYENB);
- nrdyenb = r8a66597_read(r8a66597, NRDYENB);
- bempenb = r8a66597_read(r8a66597, BEMPENB);
-
- if (mask0 & VBINT) {
- r8a66597_write(r8a66597, 0xffff & ~VBINT,
- INTSTS0);
- r8a66597_start_xclock(r8a66597);
-
- /* start vbus sampling */
- r8a66597->old_vbus = r8a66597_read(r8a66597, INTSTS0)
- & VBSTS;
- r8a66597->scount = R8A66597_MAX_SAMPLING;
-
- mod_timer(&r8a66597->timer,
- jiffies + msecs_to_jiffies(50));
- }
- if (intsts0 & DVSQ)
- irq_device_state(r8a66597);
-
- if ((intsts0 & BRDY) && (intenb0 & BRDYE)
- && (brdysts & brdyenb))
- irq_pipe_ready(r8a66597, brdysts, brdyenb);
- if ((intsts0 & BEMP) && (intenb0 & BEMPE)
- && (bempsts & bempenb))
- irq_pipe_empty(r8a66597, bempsts, bempenb);
-
- if (intsts0 & CTRT)
- irq_control_stage(r8a66597);
- }
-
- r8a66597_write(r8a66597, savepipe, CFIFOSEL);
-
- spin_unlock(&r8a66597->lock);
- return IRQ_HANDLED;
-}
-
-static void r8a66597_timer(unsigned long _r8a66597)
-{
- struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
- unsigned long flags;
- u16 tmp;
-
- spin_lock_irqsave(&r8a66597->lock, flags);
- tmp = r8a66597_read(r8a66597, SYSCFG0);
- if (r8a66597->scount > 0) {
- tmp = r8a66597_read(r8a66597, INTSTS0) & VBSTS;
- if (tmp == r8a66597->old_vbus) {
- r8a66597->scount--;
- if (r8a66597->scount == 0) {
- if (tmp == VBSTS)
- r8a66597_usb_connect(r8a66597);
- else
- r8a66597_usb_disconnect(r8a66597);
- } else {
- mod_timer(&r8a66597->timer,
- jiffies + msecs_to_jiffies(50));
- }
- } else {
- r8a66597->scount = R8A66597_MAX_SAMPLING;
- r8a66597->old_vbus = tmp;
- mod_timer(&r8a66597->timer,
- jiffies + msecs_to_jiffies(50));
- }
- }
- spin_unlock_irqrestore(&r8a66597->lock, flags);
-}
-
-/*-------------------------------------------------------------------------*/
-static int r8a66597_enable(struct usb_ep *_ep,
- const struct usb_endpoint_descriptor *desc)
-{
- struct r8a66597_ep *ep;
-
- ep = container_of(_ep, struct r8a66597_ep, ep);
- return alloc_pipe_config(ep, desc);
-}
-
-static int r8a66597_disable(struct usb_ep *_ep)
-{
- struct r8a66597_ep *ep;
- struct r8a66597_request *req;
- unsigned long flags;
-
- ep = container_of(_ep, struct r8a66597_ep, ep);
- BUG_ON(!ep);
-
- while (!list_empty(&ep->queue)) {
- req = get_request_from_ep(ep);
- spin_lock_irqsave(&ep->r8a66597->lock, flags);
- transfer_complete(ep, req, -ECONNRESET);
- spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
- }
-
- pipe_irq_disable(ep->r8a66597, ep->pipenum);
- return free_pipe_config(ep);
-}
-
-static struct usb_request *r8a66597_alloc_request(struct usb_ep *_ep,
- gfp_t gfp_flags)
-{
- struct r8a66597_request *req;
-
- req = kzalloc(sizeof(struct r8a66597_request), gfp_flags);
- if (!req)
- return NULL;
-
- INIT_LIST_HEAD(&req->queue);
-
- return &req->req;
-}
-
-static void r8a66597_free_request(struct usb_ep *_ep, struct usb_request *_req)
-{
- struct r8a66597_request *req;
-
- req = container_of(_req, struct r8a66597_request, req);
- kfree(req);
-}
-
-static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
- gfp_t gfp_flags)
-{
- struct r8a66597_ep *ep;
- struct r8a66597_request *req;
- unsigned long flags;
- int request = 0;
-
- ep = container_of(_ep, struct r8a66597_ep, ep);
- req = container_of(_req, struct r8a66597_request, req);
-
- if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
- return -ESHUTDOWN;
-
- spin_lock_irqsave(&ep->r8a66597->lock, flags);
-
- if (list_empty(&ep->queue))
- request = 1;
-
- list_add_tail(&req->queue, &ep->queue);
- req->req.actual = 0;
- req->req.status = -EINPROGRESS;
-
- if (ep->ep.desc == NULL) /* control */
- start_ep0(ep, req);
- else {
- if (request && !ep->busy)
- start_packet(ep, req);
- }
-
- spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
-
- return 0;
-}
-
-static int r8a66597_dequeue(struct usb_ep *_ep, struct usb_request *_req)
-{
- struct r8a66597_ep *ep;
- struct r8a66597_request *req;
- unsigned long flags;
-
- ep = container_of(_ep, struct r8a66597_ep, ep);
- req = container_of(_req, struct r8a66597_request, req);
-
- spin_lock_irqsave(&ep->r8a66597->lock, flags);
- if (!list_empty(&ep->queue))
- transfer_complete(ep, req, -ECONNRESET);
- spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
-
- return 0;
-}
-
-static int r8a66597_set_halt(struct usb_ep *_ep, int value)
-{
- struct r8a66597_ep *ep;
- struct r8a66597_request *req;
- unsigned long flags;
- int ret = 0;
-
- ep = container_of(_ep, struct r8a66597_ep, ep);
- req = get_request_from_ep(ep);
-
- spin_lock_irqsave(&ep->r8a66597->lock, flags);
- if (!list_empty(&ep->queue)) {
- ret = -EAGAIN;
- goto out;
- }
- if (value) {
- ep->busy = 1;
- pipe_stall(ep->r8a66597, ep->pipenum);
- } else {
- ep->busy = 0;
- ep->wedge = 0;
- pipe_stop(ep->r8a66597, ep->pipenum);
- }
-
-out:
- spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
- return ret;
-}
-
-static int r8a66597_set_wedge(struct usb_ep *_ep)
-{
- struct r8a66597_ep *ep;
- unsigned long flags;
-
- ep = container_of(_ep, struct r8a66597_ep, ep);
-
- if (!ep || !ep->ep.desc)
- return -EINVAL;
-
- spin_lock_irqsave(&ep->r8a66597->lock, flags);
- ep->wedge = 1;
- spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
-
- return usb_ep_set_halt(_ep);
-}
-
-static void r8a66597_fifo_flush(struct usb_ep *_ep)
-{
- struct r8a66597_ep *ep;
- unsigned long flags;
-
- ep = container_of(_ep, struct r8a66597_ep, ep);
- spin_lock_irqsave(&ep->r8a66597->lock, flags);
- if (list_empty(&ep->queue) && !ep->busy) {
- pipe_stop(ep->r8a66597, ep->pipenum);
- r8a66597_bclr(ep->r8a66597, BCLR, ep->fifoctr);
- r8a66597_write(ep->r8a66597, ACLRM, ep->pipectr);
- r8a66597_write(ep->r8a66597, 0, ep->pipectr);
- }
- spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
-}
-
-static struct usb_ep_ops r8a66597_ep_ops = {
- .enable = r8a66597_enable,
- .disable = r8a66597_disable,
-
- .alloc_request = r8a66597_alloc_request,
- .free_request = r8a66597_free_request,
-
- .queue = r8a66597_queue,
- .dequeue = r8a66597_dequeue,
-
- .set_halt = r8a66597_set_halt,
- .set_wedge = r8a66597_set_wedge,
- .fifo_flush = r8a66597_fifo_flush,
-};
-
-/*-------------------------------------------------------------------------*/
-static int r8a66597_start(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver)
-{
- struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget);
-
- if (!driver
- || driver->max_speed < USB_SPEED_HIGH
- || !driver->setup)
- return -EINVAL;
- if (!r8a66597)
- return -ENODEV;
-
- /* hook up the driver */
- r8a66597->driver = driver;
-
- init_controller(r8a66597);
- r8a66597_bset(r8a66597, VBSE, INTENB0);
- if (r8a66597_read(r8a66597, INTSTS0) & VBSTS) {
- r8a66597_start_xclock(r8a66597);
- /* start vbus sampling */
- r8a66597->old_vbus = r8a66597_read(r8a66597,
- INTSTS0) & VBSTS;
- r8a66597->scount = R8A66597_MAX_SAMPLING;
- mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50));
- }
-
- return 0;
-}
-
-static int r8a66597_stop(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver)
-{
- struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget);
- unsigned long flags;
-
- spin_lock_irqsave(&r8a66597->lock, flags);
- r8a66597_bclr(r8a66597, VBSE, INTENB0);
- disable_controller(r8a66597);
- spin_unlock_irqrestore(&r8a66597->lock, flags);
-
- r8a66597->driver = NULL;
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-static int r8a66597_get_frame(struct usb_gadget *_gadget)
-{
- struct r8a66597 *r8a66597 = gadget_to_r8a66597(_gadget);
- return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
-}
-
-static int r8a66597_pullup(struct usb_gadget *gadget, int is_on)
-{
- struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget);
- unsigned long flags;
-
- spin_lock_irqsave(&r8a66597->lock, flags);
- if (is_on)
- r8a66597_bset(r8a66597, DPRPU, SYSCFG0);
- else
- r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
- spin_unlock_irqrestore(&r8a66597->lock, flags);
-
- return 0;
-}
-
-static int r8a66597_set_selfpowered(struct usb_gadget *gadget, int is_self)
-{
- struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget);
-
- if (is_self)
- r8a66597->device_status |= 1 << USB_DEVICE_SELF_POWERED;
- else
- r8a66597->device_status &= ~(1 << USB_DEVICE_SELF_POWERED);
-
- return 0;
-}
-
-static const struct usb_gadget_ops r8a66597_gadget_ops = {
- .get_frame = r8a66597_get_frame,
- .udc_start = r8a66597_start,
- .udc_stop = r8a66597_stop,
- .pullup = r8a66597_pullup,
- .set_selfpowered = r8a66597_set_selfpowered,
-};
-
-static int __exit r8a66597_remove(struct platform_device *pdev)
-{
- struct r8a66597 *r8a66597 = platform_get_drvdata(pdev);
-
- usb_del_gadget_udc(&r8a66597->gadget);
- del_timer_sync(&r8a66597->timer);
- r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
-
- if (r8a66597->pdata->on_chip) {
- clk_disable_unprepare(r8a66597->clk);
- }
-
- return 0;
-}
-
-static void nop_completion(struct usb_ep *ep, struct usb_request *r)
-{
-}
-
-static int r8a66597_sudmac_ioremap(struct r8a66597 *r8a66597,
- struct platform_device *pdev)
-{
- struct resource *res;
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sudmac");
- r8a66597->sudmac_reg = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(r8a66597->sudmac_reg)) {
- dev_err(&pdev->dev, "ioremap error(sudmac).\n");
- return PTR_ERR(r8a66597->sudmac_reg);
- }
-
- return 0;
-}
-
-static int r8a66597_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- char clk_name[8];
- struct resource *res, *ires;
- int irq;
- void __iomem *reg = NULL;
- struct r8a66597 *r8a66597 = NULL;
- int ret = 0;
- int i;
- unsigned long irq_trigger;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- reg = devm_ioremap_resource(&pdev->dev, res);
- if (!reg)
- return -ENODEV;
-
- ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- irq = ires->start;
- irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
-
- if (irq < 0) {
- dev_err(dev, "platform_get_irq error.\n");
- return -ENODEV;
- }
-
- /* initialize ucd */
- r8a66597 = devm_kzalloc(dev, sizeof(struct r8a66597), GFP_KERNEL);
- if (r8a66597 == NULL)
- return -ENOMEM;
-
- spin_lock_init(&r8a66597->lock);
- platform_set_drvdata(pdev, r8a66597);
- r8a66597->pdata = dev_get_platdata(dev);
- r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;
-
- r8a66597->gadget.ops = &r8a66597_gadget_ops;
- r8a66597->gadget.max_speed = USB_SPEED_HIGH;
- r8a66597->gadget.name = udc_name;
-
- init_timer(&r8a66597->timer);
- r8a66597->timer.function = r8a66597_timer;
- r8a66597->timer.data = (unsigned long)r8a66597;
- r8a66597->reg = reg;
-
- if (r8a66597->pdata->on_chip) {
- snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id);
- r8a66597->clk = devm_clk_get(dev, clk_name);
- if (IS_ERR(r8a66597->clk)) {
- dev_err(dev, "cannot get clock \"%s\"\n", clk_name);
- return PTR_ERR(r8a66597->clk);
- }
- clk_prepare_enable(r8a66597->clk);
- }
-
- if (r8a66597->pdata->sudmac) {
- ret = r8a66597_sudmac_ioremap(r8a66597, pdev);
- if (ret < 0)
- goto clean_up2;
- }
-
- disable_controller(r8a66597); /* make sure controller is disabled */
-
- ret = devm_request_irq(dev, irq, r8a66597_irq, IRQF_SHARED,
- udc_name, r8a66597);
- if (ret < 0) {
- dev_err(dev, "request_irq error (%d)\n", ret);
- goto clean_up2;
- }
-
- INIT_LIST_HEAD(&r8a66597->gadget.ep_list);
- r8a66597->gadget.ep0 = &r8a66597->ep[0].ep;
- INIT_LIST_HEAD(&r8a66597->gadget.ep0->ep_list);
- for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
- struct r8a66597_ep *ep = &r8a66597->ep[i];
-
- if (i != 0) {
- INIT_LIST_HEAD(&r8a66597->ep[i].ep.ep_list);
- list_add_tail(&r8a66597->ep[i].ep.ep_list,
- &r8a66597->gadget.ep_list);
- }
- ep->r8a66597 = r8a66597;
- INIT_LIST_HEAD(&ep->queue);
- ep->ep.name = r8a66597_ep_name[i];
- ep->ep.ops = &r8a66597_ep_ops;
- usb_ep_set_maxpacket_limit(&ep->ep, 512);
- }
- usb_ep_set_maxpacket_limit(&r8a66597->ep[0].ep, 64);
- r8a66597->ep[0].pipenum = 0;
- r8a66597->ep[0].fifoaddr = CFIFO;
- r8a66597->ep[0].fifosel = CFIFOSEL;
- r8a66597->ep[0].fifoctr = CFIFOCTR;
- r8a66597->ep[0].pipectr = get_pipectr_addr(0);
- r8a66597->pipenum2ep[0] = &r8a66597->ep[0];
- r8a66597->epaddr2ep[0] = &r8a66597->ep[0];
-
- r8a66597->ep0_req = r8a66597_alloc_request(&r8a66597->ep[0].ep,
- GFP_KERNEL);
- if (r8a66597->ep0_req == NULL) {
- ret = -ENOMEM;
- goto clean_up2;
- }
- r8a66597->ep0_req->complete = nop_completion;
-
- ret = usb_add_gadget_udc(dev, &r8a66597->gadget);
- if (ret)
- goto err_add_udc;
-
- dev_info(dev, "version %s\n", DRIVER_VERSION);
- return 0;
-
-err_add_udc:
- r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
-clean_up2:
- if (r8a66597->pdata->on_chip)
- clk_disable_unprepare(r8a66597->clk);
-
- if (r8a66597->ep0_req)
- r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
-
- return ret;
-}
-
-/*-------------------------------------------------------------------------*/
-static struct platform_driver r8a66597_driver = {
- .remove = __exit_p(r8a66597_remove),
- .driver = {
- .name = (char *) udc_name,
- },
-};
-
-module_platform_driver_probe(r8a66597_driver, r8a66597_probe);
-
-MODULE_DESCRIPTION("R8A66597 USB gadget driver");
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Yoshihiro Shimoda");
-MODULE_ALIAS("platform:r8a66597_udc");