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|
/*
* Renesas USB driver
*
* Copyright (C) 2011 Renesas Solutions Corp.
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include "common.h"
/*
* struct
*/
struct usbhsg_request {
struct usb_request req;
struct usbhs_pkt pkt;
};
#define EP_NAME_SIZE 8
struct usbhsg_gpriv;
struct usbhsg_uep {
struct usb_ep ep;
struct usbhs_pipe *pipe;
char ep_name[EP_NAME_SIZE];
struct usbhsg_gpriv *gpriv;
};
struct usbhsg_gpriv {
struct usb_gadget gadget;
struct usbhs_mod mod;
struct list_head link;
struct usbhsg_uep *uep;
int uep_size;
struct usb_gadget_driver *driver;
u32 status;
#define USBHSG_STATUS_STARTED (1 << 0)
#define USBHSG_STATUS_REGISTERD (1 << 1)
#define USBHSG_STATUS_WEDGE (1 << 2)
};
struct usbhsg_recip_handle {
char *name;
int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
struct usb_ctrlrequest *ctrl);
int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
struct usb_ctrlrequest *ctrl);
int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
struct usb_ctrlrequest *ctrl);
};
/*
* macro
*/
#define usbhsg_priv_to_gpriv(priv) \
container_of( \
usbhs_mod_get(priv, USBHS_GADGET), \
struct usbhsg_gpriv, mod)
#define __usbhsg_for_each_uep(start, pos, g, i) \
for (i = start, pos = (g)->uep + i; \
i < (g)->uep_size; \
i++, pos = (g)->uep + i)
#define usbhsg_for_each_uep(pos, gpriv, i) \
__usbhsg_for_each_uep(1, pos, gpriv, i)
#define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \
__usbhsg_for_each_uep(0, pos, gpriv, i)
#define usbhsg_gadget_to_gpriv(g)\
container_of(g, struct usbhsg_gpriv, gadget)
#define usbhsg_req_to_ureq(r)\
container_of(r, struct usbhsg_request, req)
#define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep)
#define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv)
#define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv)
#define usbhsg_gpriv_to_dcp(gp) ((gp)->uep)
#define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i)
#define usbhsg_uep_to_gpriv(u) ((u)->gpriv)
#define usbhsg_uep_to_pipe(u) ((u)->pipe)
#define usbhsg_pipe_to_uep(p) ((p)->mod_private)
#define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
#define usbhsg_ureq_to_pkt(u) (&(u)->pkt)
#define usbhsg_pkt_to_ureq(i) \
container_of(i, struct usbhsg_request, pkt)
#define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
/* status */
#define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0)
#define usbhsg_status_set(gp, b) (gp->status |= b)
#define usbhsg_status_clr(gp, b) (gp->status &= ~b)
#define usbhsg_status_has(gp, b) (gp->status & b)
/* controller */
LIST_HEAD(the_controller_link);
#define usbhsg_for_each_controller(gpriv)\
list_for_each_entry(gpriv, &the_controller_link, link)
#define usbhsg_controller_register(gpriv)\
list_add_tail(&(gpriv)->link, &the_controller_link)
#define usbhsg_controller_unregister(gpriv)\
list_del_init(&(gpriv)->link)
/*
* queue push/pop
*/
static void usbhsg_queue_pop(struct usbhsg_uep *uep,
struct usbhsg_request *ureq,
int status)
{
struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
struct device *dev = usbhsg_gpriv_to_dev(gpriv);
dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
ureq->req.status = status;
ureq->req.complete(&uep->ep, &ureq->req);
}
static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
{
struct usbhs_pipe *pipe = pkt->pipe;
struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
ureq->req.actual = pkt->actual;
usbhsg_queue_pop(uep, ureq, 0);
}
static void usbhsg_queue_push(struct usbhsg_uep *uep,
struct usbhsg_request *ureq)
{
struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
struct device *dev = usbhsg_gpriv_to_dev(gpriv);
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
struct usb_request *req = &ureq->req;
req->actual = 0;
req->status = -EINPROGRESS;
usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
req->buf, req->length, req->zero);
dev_dbg(dev, "pipe %d : queue push (%d)\n",
usbhs_pipe_number(pipe),
req->length);
}
/*
* dma map/unmap
*/
static int usbhsg_dma_map(struct device *dev,
struct usbhs_pkt *pkt,
enum dma_data_direction dir)
{
struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
struct usb_request *req = &ureq->req;
if (pkt->dma != DMA_ADDR_INVALID) {
dev_err(dev, "dma is already mapped\n");
return -EIO;
}
if (req->dma == DMA_ADDR_INVALID) {
pkt->dma = dma_map_single(dev, pkt->buf, pkt->length, dir);
} else {
dma_sync_single_for_device(dev, req->dma, req->length, dir);
pkt->dma = req->dma;
}
if (dma_mapping_error(dev, pkt->dma)) {
dev_err(dev, "dma mapping error %x\n", pkt->dma);
return -EIO;
}
return 0;
}
static int usbhsg_dma_unmap(struct device *dev,
struct usbhs_pkt *pkt,
enum dma_data_direction dir)
{
struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
struct usb_request *req = &ureq->req;
if (pkt->dma == DMA_ADDR_INVALID) {
dev_err(dev, "dma is not mapped\n");
return -EIO;
}
if (req->dma == DMA_ADDR_INVALID)
dma_unmap_single(dev, pkt->dma, pkt->length, dir);
else
dma_sync_single_for_cpu(dev, req->dma, req->length, dir);
pkt->dma = DMA_ADDR_INVALID;
return 0;
}
static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
{
struct usbhs_pipe *pipe = pkt->pipe;
struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
struct device *dev = usbhsg_gpriv_to_dev(gpriv);
enum dma_data_direction dir;
dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
if (map)
return usbhsg_dma_map(dev, pkt, dir);
else
return usbhsg_dma_unmap(dev, pkt, dir);
}
/*
* USB_TYPE_STANDARD / clear feature functions
*/
static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
struct usbhsg_uep *uep,
struct usb_ctrlrequest *ctrl)
{
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
usbhs_dcp_control_transfer_done(pipe);
return 0;
}
static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
struct usbhsg_uep *uep,
struct usb_ctrlrequest *ctrl)
{
struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
usbhs_pipe_disable(pipe);
usbhs_pipe_clear_sequence(pipe);
usbhs_pipe_enable(pipe);
}
usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
return 0;
}
struct usbhsg_recip_handle req_clear_feature = {
.name = "clear feature",
.device = usbhsg_recip_handler_std_control_done,
.interface = usbhsg_recip_handler_std_control_done,
.endpoint = usbhsg_recip_handler_std_clear_endpoint,
};
/*
* USB_TYPE handler
*/
static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
struct usbhsg_recip_handle *handler,
struct usb_ctrlrequest *ctrl)
{
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
struct device *dev = usbhsg_gpriv_to_dev(gpriv);
struct usbhsg_uep *uep;
struct usbhs_pipe *pipe;
int recip = ctrl->bRequestType & USB_RECIP_MASK;
int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
int ret;
int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
struct usb_ctrlrequest *ctrl);
char *msg;
uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
pipe = usbhsg_uep_to_pipe(uep);
if (!pipe) {
dev_err(dev, "wrong recip request\n");
ret = -EINVAL;
goto usbhsg_recip_run_handle_end;
}
switch (recip) {
case USB_RECIP_DEVICE:
msg = "DEVICE";
func = handler->device;
break;
case USB_RECIP_INTERFACE:
msg = "INTERFACE";
func = handler->interface;
break;
case USB_RECIP_ENDPOINT:
msg = "ENDPOINT";
func = handler->endpoint;
break;
default:
dev_warn(dev, "unsupported RECIP(%d)\n", recip);
func = NULL;
ret = -EINVAL;
}
if (func) {
unsigned long flags;
dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
/******************** spin lock ********************/
usbhs_lock(priv, flags);
ret = func(priv, uep, ctrl);
usbhs_unlock(priv, flags);
/******************** spin unlock ******************/
}
usbhsg_recip_run_handle_end:
usbhs_pkt_start(pipe);
return ret;
}
/*
* irq functions
*
* it will be called from usbhs_interrupt
*/
static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
struct usbhs_irq_state *irq_state)
{
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
struct device *dev = usbhsg_gpriv_to_dev(gpriv);
gpriv->gadget.speed = usbhs_bus_get_speed(priv);
dev_dbg(dev, "state = %x : speed : %d\n",
usbhs_status_get_device_state(irq_state),
gpriv->gadget.speed);
return 0;
}
static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
struct usbhs_irq_state *irq_state)
{
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
struct device *dev = usbhsg_gpriv_to_dev(gpriv);
struct usb_ctrlrequest ctrl;
struct usbhsg_recip_handle *recip_handler = NULL;
int stage = usbhs_status_get_ctrl_stage(irq_state);
int ret = 0;
dev_dbg(dev, "stage = %d\n", stage);
/*
* see Manual
*
* "Operation"
* - "Interrupt Function"
* - "Control Transfer Stage Transition Interrupt"
* - Fig. "Control Transfer Stage Transitions"
*/
switch (stage) {
case READ_DATA_STAGE:
pipe->handler = &usbhs_fifo_pio_push_handler;
break;
case WRITE_DATA_STAGE:
pipe->handler = &usbhs_fifo_pio_pop_handler;
break;
case NODATA_STATUS_STAGE:
pipe->handler = &usbhs_ctrl_stage_end_handler;
break;
default:
return ret;
}
/*
* get usb request
*/
usbhs_usbreq_get_val(priv, &ctrl);
switch (ctrl.bRequestType & USB_TYPE_MASK) {
case USB_TYPE_STANDARD:
switch (ctrl.bRequest) {
case USB_REQ_CLEAR_FEATURE:
recip_handler = &req_clear_feature;
break;
}
}
/*
* setup stage / run recip
*/
if (recip_handler)
ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
else
ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
if (ret < 0)
usbhs_pipe_stall(pipe);
return ret;
}
/*
*
* usb_dcp_ops
*
*/
static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
{
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
struct usbhs_pkt *pkt;
usbhs_pipe_disable(pipe);
while (1) {
pkt = usbhs_pkt_pop(pipe, NULL);
if (!pkt)
break;
}
return 0;
}
static void usbhsg_uep_init(struct usbhsg_gpriv *gpriv)
{
int i;
struct usbhsg_uep *uep;
usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
uep->pipe = NULL;
}
/*
*
* usb_ep_ops
*
*/
static int usbhsg_ep_enable(struct usb_ep *ep,
const struct usb_endpoint_descriptor *desc)
{
struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
struct usbhs_pipe *pipe;
int ret = -EIO;
/*
* if it already have pipe,
* nothing to do
*/
if (uep->pipe) {
usbhs_pipe_clear(uep->pipe);
usbhs_pipe_clear_sequence(uep->pipe);
return 0;
}
pipe = usbhs_pipe_malloc(priv,
usb_endpoint_type(desc),
usb_endpoint_dir_in(desc));
if (pipe) {
uep->pipe = pipe;
pipe->mod_private = uep;
/* set epnum / maxp */
usbhs_pipe_config_update(pipe, 0,
usb_endpoint_num(desc),
usb_endpoint_maxp(desc));
/*
* usbhs_fifo_dma_push/pop_handler try to
* use dmaengine if possible.
* It will use pio handler if impossible.
*/
if (usb_endpoint_dir_in(desc))
pipe->handler = &usbhs_fifo_dma_push_handler;
else
pipe->handler = &usbhs_fifo_dma_pop_handler;
ret = 0;
}
return ret;
}
static int usbhsg_ep_disable(struct usb_ep *ep)
{
struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
return usbhsg_pipe_disable(uep);
}
static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
gfp_t gfp_flags)
{
struct usbhsg_request *ureq;
ureq = kzalloc(sizeof *ureq, gfp_flags);
if (!ureq)
return NULL;
usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
ureq->req.dma = DMA_ADDR_INVALID;
return &ureq->req;
}
static void usbhsg_ep_free_request(struct usb_ep *ep,
struct usb_request *req)
{
struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
WARN_ON(!list_empty(&ureq->pkt.node));
kfree(ureq);
}
static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
gfp_t gfp_flags)
{
struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
/* param check */
if (usbhsg_is_not_connected(gpriv) ||
unlikely(!gpriv->driver) ||
unlikely(!pipe))
return -ESHUTDOWN;
usbhsg_queue_push(uep, ureq);
return 0;
}
static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
{
struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
usbhsg_queue_pop(uep, ureq, -ECONNRESET);
return 0;
}
static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
{
struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
struct device *dev = usbhsg_gpriv_to_dev(gpriv);
unsigned long flags;
usbhsg_pipe_disable(uep);
dev_dbg(dev, "set halt %d (pipe %d)\n",
halt, usbhs_pipe_number(pipe));
/******************** spin lock ********************/
usbhs_lock(priv, flags);
if (halt)
usbhs_pipe_stall(pipe);
else
usbhs_pipe_disable(pipe);
if (halt && wedge)
usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
else
usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
usbhs_unlock(priv, flags);
/******************** spin unlock ******************/
return 0;
}
static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
{
return __usbhsg_ep_set_halt_wedge(ep, value, 0);
}
static int usbhsg_ep_set_wedge(struct usb_ep *ep)
{
return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
}
static struct usb_ep_ops usbhsg_ep_ops = {
.enable = usbhsg_ep_enable,
.disable = usbhsg_ep_disable,
.alloc_request = usbhsg_ep_alloc_request,
.free_request = usbhsg_ep_free_request,
.queue = usbhsg_ep_queue,
.dequeue = usbhsg_ep_dequeue,
.set_halt = usbhsg_ep_set_halt,
.set_wedge = usbhsg_ep_set_wedge,
};
/*
* usb module start/end
*/
static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
{
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
struct device *dev = usbhs_priv_to_dev(priv);
unsigned long flags;
int ret = 0;
/******************** spin lock ********************/
usbhs_lock(priv, flags);
usbhsg_status_set(gpriv, status);
if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
ret = -1; /* not ready */
usbhs_unlock(priv, flags);
/******************** spin unlock ********************/
if (ret < 0)
return 0; /* not ready is not error */
/*
* enable interrupt and systems if ready
*/
dev_dbg(dev, "start gadget\n");
/*
* pipe initialize and enable DCP
*/
usbhs_pipe_init(priv,
usbhsg_dma_map_ctrl);
usbhs_fifo_init(priv);
usbhsg_uep_init(gpriv);
/* dcp init */
dcp->pipe = usbhs_dcp_malloc(priv);
dcp->pipe->mod_private = dcp;
usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
/*
* system config enble
* - HI speed
* - function
* - usb module
*/
usbhs_sys_hispeed_ctrl(priv, 1);
usbhs_sys_function_ctrl(priv, 1);
usbhs_sys_usb_ctrl(priv, 1);
/*
* enable irq callback
*/
mod->irq_dev_state = usbhsg_irq_dev_state;
mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage;
usbhs_irq_callback_update(priv, mod);
return 0;
}
static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
{
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
struct device *dev = usbhs_priv_to_dev(priv);
unsigned long flags;
int ret = 0;
/******************** spin lock ********************/
usbhs_lock(priv, flags);
usbhsg_status_clr(gpriv, status);
if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
!usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
ret = -1; /* already done */
usbhs_unlock(priv, flags);
/******************** spin unlock ********************/
if (ret < 0)
return 0; /* already done is not error */
/*
* disable interrupt and systems if 1st try
*/
usbhs_fifo_quit(priv);
/* disable all irq */
mod->irq_dev_state = NULL;
mod->irq_ctrl_stage = NULL;
usbhs_irq_callback_update(priv, mod);
gpriv->gadget.speed = USB_SPEED_UNKNOWN;
/* disable sys */
usbhs_sys_hispeed_ctrl(priv, 0);
usbhs_sys_function_ctrl(priv, 0);
usbhs_sys_usb_ctrl(priv, 0);
usbhsg_pipe_disable(dcp);
dev_dbg(dev, "stop gadget\n");
return 0;
}
/*
*
* linux usb function
*
*/
static int usbhsg_gadget_start(struct usb_gadget *gadget,
struct usb_gadget_driver *driver)
{
struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
struct usbhs_priv *priv;
struct device *dev;
int ret;
if (!driver ||
!driver->setup ||
driver->speed != USB_SPEED_HIGH)
return -EINVAL;
dev = usbhsg_gpriv_to_dev(gpriv);
priv = usbhsg_gpriv_to_priv(gpriv);
/* first hook up the driver ... */
gpriv->driver = driver;
gpriv->gadget.dev.driver = &driver->driver;
ret = device_add(&gpriv->gadget.dev);
if (ret) {
dev_err(dev, "device_add error %d\n", ret);
goto add_fail;
}
return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
add_fail:
gpriv->driver = NULL;
gpriv->gadget.dev.driver = NULL;
return ret;
}
static int usbhsg_gadget_stop(struct usb_gadget *gadget,
struct usb_gadget_driver *driver)
{
struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
struct usbhs_priv *priv;
struct device *dev;
if (!driver ||
!driver->unbind)
return -EINVAL;
dev = usbhsg_gpriv_to_dev(gpriv);
priv = usbhsg_gpriv_to_priv(gpriv);
usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
device_del(&gpriv->gadget.dev);
gpriv->driver = NULL;
return 0;
}
/*
* usb gadget ops
*/
static int usbhsg_get_frame(struct usb_gadget *gadget)
{
struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
return usbhs_frame_get_num(priv);
}
static struct usb_gadget_ops usbhsg_gadget_ops = {
.get_frame = usbhsg_get_frame,
.udc_start = usbhsg_gadget_start,
.udc_stop = usbhsg_gadget_stop,
};
static int usbhsg_start(struct usbhs_priv *priv)
{
return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
}
static int usbhsg_stop(struct usbhs_priv *priv)
{
return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
}
int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
{
struct usbhsg_gpriv *gpriv;
struct usbhsg_uep *uep;
struct device *dev = usbhs_priv_to_dev(priv);
int pipe_size = usbhs_get_dparam(priv, pipe_size);
int i;
int ret;
gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
if (!gpriv) {
dev_err(dev, "Could not allocate gadget priv\n");
return -ENOMEM;
}
uep = kzalloc(sizeof(struct usbhsg_uep) * pipe_size, GFP_KERNEL);
if (!uep) {
dev_err(dev, "Could not allocate ep\n");
ret = -ENOMEM;
goto usbhs_mod_gadget_probe_err_gpriv;
}
/*
* CAUTION
*
* There is no guarantee that it is possible to access usb module here.
* Don't accesses to it.
* The accesse will be enable after "usbhsg_start"
*/
/*
* register itself
*/
usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
/* init gpriv */
gpriv->mod.name = "gadget";
gpriv->mod.start = usbhsg_start;
gpriv->mod.stop = usbhsg_stop;
gpriv->uep = uep;
gpriv->uep_size = pipe_size;
usbhsg_status_init(gpriv);
/*
* init gadget
*/
device_initialize(&gpriv->gadget.dev);
dev_set_name(&gpriv->gadget.dev, "gadget");
gpriv->gadget.dev.parent = dev;
gpriv->gadget.name = "renesas_usbhs_udc";
gpriv->gadget.ops = &usbhsg_gadget_ops;
gpriv->gadget.is_dualspeed = 1;
INIT_LIST_HEAD(&gpriv->gadget.ep_list);
/*
* init usb_ep
*/
usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
uep->gpriv = gpriv;
snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
uep->ep.name = uep->ep_name;
uep->ep.ops = &usbhsg_ep_ops;
INIT_LIST_HEAD(&uep->ep.ep_list);
/* init DCP */
if (usbhsg_is_dcp(uep)) {
gpriv->gadget.ep0 = &uep->ep;
uep->ep.maxpacket = 64;
}
/* init normal pipe */
else {
uep->ep.maxpacket = 512;
list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
}
}
usbhsg_controller_register(gpriv);
ret = usb_add_gadget_udc(dev, &gpriv->gadget);
if (ret)
goto err_add_udc;
dev_info(dev, "gadget probed\n");
return 0;
err_add_udc:
kfree(gpriv->uep);
usbhs_mod_gadget_probe_err_gpriv:
kfree(gpriv);
return ret;
}
void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
{
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
usb_del_gadget_udc(&gpriv->gadget);
usbhsg_controller_unregister(gpriv);
kfree(gpriv->uep);
kfree(gpriv);
}
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