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linuxdebug/drivers/usb/gadget/udc/r8a66597-udc.c

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// SPDX-License-Identifier: GPL-2.0
/*
* R8A66597 UDC (USB gadget)
*
* Copyright (C) 2006-2009 Renesas Solutions Corp.
*
* Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
*/
#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 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[usb_endpoint_num(desc)]
= 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 (usb_endpoint_type(desc)) {
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 = usb_endpoint_num(desc);
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);
mdelay(3);
r8a66597_bset(r8a66597, PLLC, SYSCFG0);
mdelay(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);
usb_gadget_giveback_request(&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_ATOMIC);
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);
usb_gadget_udc_reset(&r8a66597->gadget, r8a66597->driver);
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 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) {
u16 brdysts = r8a66597_read(r8a66597, BRDYSTS);
u16 bempsts = r8a66597_read(r8a66597, BEMPSTS);
u16 brdyenb = r8a66597_read(r8a66597, BRDYENB);
u16 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(struct timer_list *t)
{
struct r8a66597 *r8a66597 = from_timer(r8a66597, t, timer);
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 = container_of(_ep, struct r8a66597_ep, ep);
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&ep->r8a66597->lock, flags);
if (!list_empty(&ep->queue)) {
ret = -EAGAIN;
} else if (value) {
ep->busy = 1;
pipe_stall(ep->r8a66597, ep->pipenum);
} else {
ep->busy = 0;
ep->wedge = 0;
pipe_stop(ep->r8a66597, ep->pipenum);
}
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 const 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 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);
gadget->is_selfpowered = (is_self != 0);
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 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)
{
r8a66597->sudmac_reg =
devm_platform_ioremap_resource_byname(pdev, "sudmac");
return PTR_ERR_OR_ZERO(r8a66597->sudmac_reg);
}
static int r8a66597_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
char clk_name[8];
struct resource *ires;
int irq;
void __iomem *reg = NULL;
struct r8a66597 *r8a66597 = NULL;
int ret = 0;
int i;
unsigned long irq_trigger;
reg = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(reg))
return PTR_ERR(reg);
ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!ires)
return -EINVAL;
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;
timer_setup(&r8a66597->timer, r8a66597_timer, 0);
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);
if (i == 0) {
ep->ep.caps.type_control = true;
} else {
ep->ep.caps.type_iso = true;
ep->ep.caps.type_bulk = true;
ep->ep.caps.type_int = true;
}
ep->ep.caps.dir_in = true;
ep->ep.caps.dir_out = true;
}
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 = r8a66597_remove,
.driver = {
.name = 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");
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