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alistair23-linux/drivers/usb/gadget/r8a66597-udc.c
Robert Baldyga e117e742d3 usb: gadget: add "maxpacket_limit" field to struct usb_ep 
This patch adds "maxpacket_limit" to struct usb_ep. This field contains
maximum value of maxpacket supported by driver, and is set in driver probe.
This value should be used by autoconfig() function, because value of field
"maxpacket" is set to value from endpoint descriptor when endpoint becomes
enabled. So when autoconfig() function will be called again for this endpoint,
"maxpacket" value will contain wMaxPacketSize from descriptior instead of
maximum packet size for this endpoint.

For this reason this patch adds new field "maxpacket_limit" which contains
value of maximum packet size (which defines maximum endpoint capabilities).
This value is used in ep_matches() function used by autoconfig().

Value of "maxpacket_limit" should be set in UDC driver probe function, using
usb_ep_set_maxpacket_limit() function, defined in gadget.h. This function
set choosen value to both "maxpacket_limit" and "maxpacket" fields.

This patch modifies UDC drivers by adding support for maxpacket_limit.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-12-17 13:17:41 -06:00

2031 lines
50 KiB
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/*
* 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);
iounmap(r8a66597->reg);
if (r8a66597->pdata->sudmac)
iounmap(r8a66597->sudmac_reg);
free_irq(platform_get_irq(pdev, 0), r8a66597);
r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
if (r8a66597->pdata->on_chip) {
clk_disable_unprepare(r8a66597->clk);
clk_put(r8a66597->clk);
}
kfree(r8a66597);
return 0;
}
static void nop_completion(struct usb_ep *ep, struct usb_request *r)
{
}
static int __init r8a66597_sudmac_ioremap(struct r8a66597 *r8a66597,
struct platform_device *pdev)
{
struct resource *res;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sudmac");
if (!res) {
dev_err(&pdev->dev, "platform_get_resource error(sudmac).\n");
return -ENODEV;
}
r8a66597->sudmac_reg = ioremap(res->start, resource_size(res));
if (r8a66597->sudmac_reg == NULL) {
dev_err(&pdev->dev, "ioremap error(sudmac).\n");
return -ENOMEM;
}
return 0;
}
static int __init r8a66597_probe(struct platform_device *pdev)
{
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);
if (!res) {
ret = -ENODEV;
dev_err(&pdev->dev, "platform_get_resource error.\n");
goto clean_up;
}
ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
irq = ires->start;
irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
if (irq < 0) {
ret = -ENODEV;
dev_err(&pdev->dev, "platform_get_irq error.\n");
goto clean_up;
}
reg = ioremap(res->start, resource_size(res));
if (reg == NULL) {
ret = -ENOMEM;
dev_err(&pdev->dev, "ioremap error.\n");
goto clean_up;
}
/* initialize ucd */
r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL);
if (r8a66597 == NULL) {
ret = -ENOMEM;
dev_err(&pdev->dev, "kzalloc error\n");
goto clean_up;
}
spin_lock_init(&r8a66597->lock);
platform_set_drvdata(pdev, r8a66597);
r8a66597->pdata = dev_get_platdata(&pdev->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 = clk_get(&pdev->dev, clk_name);
if (IS_ERR(r8a66597->clk)) {
dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
clk_name);
ret = PTR_ERR(r8a66597->clk);
goto clean_up;
}
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 = request_irq(irq, r8a66597_irq, IRQF_SHARED,
udc_name, r8a66597);
if (ret < 0) {
dev_err(&pdev->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_up3;
}
r8a66597->ep0_req->complete = nop_completion;
ret = usb_add_gadget_udc(&pdev->dev, &r8a66597->gadget);
if (ret)
goto err_add_udc;
dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
return 0;
err_add_udc:
r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
clean_up3:
free_irq(irq, r8a66597);
clean_up2:
if (r8a66597->pdata->on_chip) {
clk_disable_unprepare(r8a66597->clk);
clk_put(r8a66597->clk);
}
clean_up:
if (r8a66597) {
if (r8a66597->sudmac_reg)
iounmap(r8a66597->sudmac_reg);
if (r8a66597->ep0_req)
r8a66597_free_request(&r8a66597->ep[0].ep,
r8a66597->ep0_req);
kfree(r8a66597);
}
if (reg)
iounmap(reg);
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");
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