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linux/drivers/usb/gadget/udc/r8a66597-udc.c
Kees Cook e99e88a9d2 treewide: setup_timer() -> timer_setup() 
This converts all remaining cases of the old setup_timer() API into using
timer_setup(), where the callback argument is the structure already
holding the struct timer_list. These should have no behavioral changes,
since they just change which pointer is passed into the callback with
the same available pointers after conversion. It handles the following
examples, in addition to some other variations.

Casting from unsigned long:

    void my_callback(unsigned long data)
    {
        struct something *ptr = (struct something *)data;
    ...
    }
    ...
    setup_timer(&ptr->my_timer, my_callback, ptr);

and forced object casts:

    void my_callback(struct something *ptr)
    {
    ...
    }
    ...
    setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr);

become:

    void my_callback(struct timer_list *t)
    {
        struct something *ptr = from_timer(ptr, t, my_timer);
    ...
    }
    ...
    timer_setup(&ptr->my_timer, my_callback, 0);

Direct function assignments:

    void my_callback(unsigned long data)
    {
        struct something *ptr = (struct something *)data;
    ...
    }
    ...
    ptr->my_timer.function = my_callback;

have a temporary cast added, along with converting the args:

    void my_callback(struct timer_list *t)
    {
        struct something *ptr = from_timer(ptr, t, my_timer);
    ...
    }
    ...
    ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback;

And finally, callbacks without a data assignment:

    void my_callback(unsigned long data)
    {
    ...
    }
    ...
    setup_timer(&ptr->my_timer, my_callback, 0);

have their argument renamed to verify they're unused during conversion:

    void my_callback(struct timer_list *unused)
    {
    ...
    }
    ...
    timer_setup(&ptr->my_timer, my_callback, 0);

The conversion is done with the following Coccinelle script:

spatch --very-quiet --all-includes --include-headers \
	-I ./arch/x86/include -I ./arch/x86/include/generated \
	-I ./include -I ./arch/x86/include/uapi \
	-I ./arch/x86/include/generated/uapi -I ./include/uapi \
	-I ./include/generated/uapi --include ./include/linux/kconfig.h \
	--dir . \
	--cocci-file ~/src/data/timer_setup.cocci

@fix_address_of@
expression e;
@@

 setup_timer(
-&(e)
+&e
 , ...)

// Update any raw setup_timer() usages that have a NULL callback, but
// would otherwise match change_timer_function_usage, since the latter
// will update all function assignments done in the face of a NULL
// function initialization in setup_timer().
@change_timer_function_usage_NULL@
expression _E;
identifier _timer;
type _cast_data;
@@

(
-setup_timer(&_E->_timer, NULL, _E);
+timer_setup(&_E->_timer, NULL, 0);
|
-setup_timer(&_E->_timer, NULL, (_cast_data)_E);
+timer_setup(&_E->_timer, NULL, 0);
|
-setup_timer(&_E._timer, NULL, &_E);
+timer_setup(&_E._timer, NULL, 0);
|
-setup_timer(&_E._timer, NULL, (_cast_data)&_E);
+timer_setup(&_E._timer, NULL, 0);
)

@change_timer_function_usage@
expression _E;
identifier _timer;
struct timer_list _stl;
identifier _callback;
type _cast_func, _cast_data;
@@

(
-setup_timer(&_E->_timer, _callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, &_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, &_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)&_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, &_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, &_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
 _E->_timer@_stl.function = _callback;
|
 _E->_timer@_stl.function = &_callback;
|
 _E->_timer@_stl.function = (_cast_func)_callback;
|
 _E->_timer@_stl.function = (_cast_func)&_callback;
|
 _E._timer@_stl.function = _callback;
|
 _E._timer@_stl.function = &_callback;
|
 _E._timer@_stl.function = (_cast_func)_callback;
|
 _E._timer@_stl.function = (_cast_func)&_callback;
)

// callback(unsigned long arg)
@change_callback_handle_cast
 depends on change_timer_function_usage@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
identifier _handle;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *t
 )
 {
(
	... when != _origarg
	_handletype *_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle;
	... when != _handle
	_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle;
	... when != _handle
	_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
)
 }

// callback(unsigned long arg) without existing variable
@change_callback_handle_cast_no_arg
 depends on change_timer_function_usage &&
                     !change_callback_handle_cast@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *t
 )
 {
+	_handletype *_origarg = from_timer(_origarg, t, _timer);
+
	... when != _origarg
-	(_handletype *)_origarg
+	_origarg
	... when != _origarg
 }

// Avoid already converted callbacks.
@match_callback_converted
 depends on change_timer_function_usage &&
            !change_callback_handle_cast &&
	    !change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier t;
@@

 void _callback(struct timer_list *t)
 { ... }

// callback(struct something *handle)
@change_callback_handle_arg
 depends on change_timer_function_usage &&
	    !match_callback_converted &&
            !change_callback_handle_cast &&
            !change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
@@

 void _callback(
-_handletype *_handle
+struct timer_list *t
 )
 {
+	_handletype *_handle = from_timer(_handle, t, _timer);
	...
 }

// If change_callback_handle_arg ran on an empty function, remove
// the added handler.
@unchange_callback_handle_arg
 depends on change_timer_function_usage &&
	    change_callback_handle_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
identifier t;
@@

 void _callback(struct timer_list *t)
 {
-	_handletype *_handle = from_timer(_handle, t, _timer);
 }

// We only want to refactor the setup_timer() data argument if we've found
// the matching callback. This undoes changes in change_timer_function_usage.
@unchange_timer_function_usage
 depends on change_timer_function_usage &&
            !change_callback_handle_cast &&
            !change_callback_handle_cast_no_arg &&
	    !change_callback_handle_arg@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type change_timer_function_usage._cast_data;
@@

(
-timer_setup(&_E->_timer, _callback, 0);
+setup_timer(&_E->_timer, _callback, (_cast_data)_E);
|
-timer_setup(&_E._timer, _callback, 0);
+setup_timer(&_E._timer, _callback, (_cast_data)&_E);
)

// If we fixed a callback from a .function assignment, fix the
// assignment cast now.
@change_timer_function_assignment
 depends on change_timer_function_usage &&
            (change_callback_handle_cast ||
             change_callback_handle_cast_no_arg ||
             change_callback_handle_arg)@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_func;
typedef TIMER_FUNC_TYPE;
@@

(
 _E->_timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_timer.function =
-&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_timer.function =
-(_cast_func)_callback;
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-&_callback;
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-(_cast_func)_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
)

// Sometimes timer functions are called directly. Replace matched args.
@change_timer_function_calls
 depends on change_timer_function_usage &&
            (change_callback_handle_cast ||
             change_callback_handle_cast_no_arg ||
             change_callback_handle_arg)@
expression _E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_data;
@@

 _callback(
(
-(_cast_data)_E
+&_E->_timer
|
-(_cast_data)&_E
+&_E._timer
|
-_E
+&_E->_timer
)
 )

// If a timer has been configured without a data argument, it can be
// converted without regard to the callback argument, since it is unused.
@match_timer_function_unused_data@
expression _E;
identifier _timer;
identifier _callback;
@@

(
-setup_timer(&_E->_timer, _callback, 0);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0L);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0UL);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0L);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0UL);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0L);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0UL);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0L);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0UL);
+timer_setup(_timer, _callback, 0);
)

@change_callback_unused_data
 depends on match_timer_function_unused_data@
identifier match_timer_function_unused_data._callback;
type _origtype;
identifier _origarg;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *unused
 )
 {
	... when != _origarg
 }

Signed-off-by: Kees Cook <keescook@chromium.org>
2017-11-21 15:57:07 -08:00

1982 lines
48 KiB
C
Raw Blame History

// 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);
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);
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_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);
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)
{
struct resource *res;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sudmac");
r8a66597->sudmac_reg = devm_ioremap_resource(&pdev->dev, res);
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 *res, *ires;
int irq;
void __iomem *reg = NULL;
struct r8a66597 *r8a66597 = NULL;
int ret = 0;
int i;
unsigned long irq_trigger;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(reg))
return PTR_ERR(reg);
ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
irq = ires->start;
irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
if (irq < 0) {
dev_err(dev, "platform_get_irq error.\n");
return -ENODEV;
}
/* initialize ucd */
r8a66597 = devm_kzalloc(dev, sizeof(struct r8a66597), GFP_KERNEL);
if (r8a66597 == NULL)
return -ENOMEM;
spin_lock_init(&r8a66597->lock);
platform_set_drvdata(pdev, r8a66597);
r8a66597->pdata = dev_get_platdata(dev);
r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;
r8a66597->gadget.ops = &r8a66597_gadget_ops;
r8a66597->gadget.max_speed = USB_SPEED_HIGH;
r8a66597->gadget.name = udc_name;
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 = (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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