// SPDX-License-Identifier: GPL-1.0+
/*
* Renesas USB driver
*
* Copyright (C) 2011 Renesas Solutions Corp.
* Copyright (C) 2019 Renesas Electronics Corporation
* Kuninori Morimoto <[email protected]>
*/
#include <linux/delay.h>
#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 <linux/usb/otg.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;
spinlock_t lock; /* protect the pipe */
char ep_name[EP_NAME_SIZE];
struct usbhsg_gpriv *gpriv;
};
struct usbhsg_gpriv {
struct usb_gadget gadget;
struct usbhs_mod mod;
struct usbhsg_uep *uep;
int uep_size;
struct usb_gadget_driver *driver;
struct usb_phy *transceiver;
bool vbus_active;
u32 status;
#define USBHSG_STATUS_STARTED (1 << 0)
#define USBHSG_STATUS_REGISTERD (1 << 1)
#define USBHSG_STATUS_WEDGE (1 << 2)
#define USBHSG_STATUS_SELF_POWERED (1 << 3)
#define USBHSG_STATUS_SOFT_CONNECT (1 << 4)
};
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; \
((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \
(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)
/*
* 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);
struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
if (pipe)
dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
ureq->req.status = status;
spin_unlock(usbhs_priv_to_lock(priv));
usb_gadget_giveback_request(&uep->ep, &ureq->req);
spin_lock(usbhs_priv_to_lock(priv));
}
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_priv *priv = usbhsg_gpriv_to_priv(gpriv);
unsigned long flags;
usbhs_lock(priv, flags);
__usbhsg_queue_pop(uep, ureq, status);
usbhs_unlock(priv, flags);
}
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);
unsigned long flags;
ureq->req.actual = pkt->actual;
usbhs_lock(priv, flags);
if (uep)
__usbhsg_queue_pop(uep, ureq, 0);
usbhs_unlock(priv, flags);
}
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, -1);
usbhs_pkt_start(pipe);
dev_dbg(dev, "pipe %d : queue push (%d)\n",
usbhs_pipe_number(pipe),
req->length);
}
/*
* dma map/unmap
*/
static int usbhsg_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
int map)
{
struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
struct usb_request *req = &ureq->req;
struct usbhs_pipe *pipe = pkt->pipe;
enum dma_data_direction dir;
int ret = 0;
dir = usbhs_pipe_is_dir_host(pipe);
if (map) {
/* it can not use scatter/gather */
WARN_ON(req->num_sgs);
ret = usb_gadget_map_request_by_dev(dma_dev, req, dir);
if (ret < 0)
return ret;
pkt->dma = req->dma;
} else {
usb_gadget_unmap_request_by_dev(dma_dev, req, dir);
}
return ret;
}
/*
* 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_sequence_data0(pipe);
usbhs_pipe_enable(pipe);
}
usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
usbhs_pkt_start(pipe);
return 0;
}
static 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_STANDARD / set feature functions
*/
static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
struct usbhsg_uep *uep,
struct usb_ctrlrequest *ctrl)
{
switch (le16_to_cpu(ctrl->wValue)) {
case USB_DEVICE_TEST_MODE:
usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
udelay(100);
usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex) >> 8);
break;
default:
usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
break;
}
return 0;
}
static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
struct usbhsg_uep *uep,
struct usb_ctrlrequest *ctrl)
{
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
usbhs_pipe_stall(pipe);
usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
return 0;
}
static struct usbhsg_recip_handle req_set_feature = {
.name = "set feature",
.device = usbhsg_recip_handler_std_set_device,
.interface = usbhsg_recip_handler_std_control_done,
.endpoint = usbhsg_recip_handler_std_set_endpoint,
};
/*
* USB_TYPE_STANDARD / get status functions
*/
static void __usbhsg_recip_send_complete(struct usb_ep *ep,
struct usb_request *req)
{
struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
/* free allocated recip-buffer/usb_request */
kfree(ureq->pkt.buf);
usb_ep_free_request(ep, req);
}
static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
unsigned short status)
{
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_request *req;
__le16 *buf;
/* alloc new usb_request for recip */
req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
if (!req) {
dev_err(dev, "recip request allocation fail\n");
return;
}
/* alloc recip data buffer */
buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
if (!buf) {
usb_ep_free_request(&dcp->ep, req);
return;
}
/* recip data is status */
*buf = cpu_to_le16(status);
/* allocated usb_request/buffer will be freed */
req->complete = __usbhsg_recip_send_complete;
req->buf = buf;
req->length = sizeof(*buf);
req->zero = 0;
/* push packet */
pipe->handler = &usbhs_fifo_pio_push_handler;
usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
}
static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
struct usbhsg_uep *uep,
struct usb_ctrlrequest *ctrl)
{
struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
unsigned short status = 0;
if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
status = 1 << USB_DEVICE_SELF_POWERED;
__usbhsg_recip_send_status(gpriv, status);
return 0;
}
static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
struct usbhsg_uep *uep,
struct usb_ctrlrequest *ctrl)
{
struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
unsigned short status = 0;
__usbhsg_recip_send_status(gpriv, status);
return 0;
}
static int usbhsg_recip_handler_std_get_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);
unsigned short status = 0;
if (usbhs_pipe_is_stall(pipe))
status = 1 << USB_ENDPOINT_HALT;
__usbhsg_recip_send_status(gpriv, status);
return 0;
}
static struct usbhsg_recip_handle req_get_status = {
.name = "get status",
.device = usbhsg_recip_handler_std_get_device,
.interface = usbhsg_recip_handler_std_get_interface,
.endpoint = usbhsg_recip_handler_std_get_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 = 0;
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");
return -EINVAL;
}
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) {
dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
ret = func(priv, uep, ctrl);
}
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);
int state = usbhs_status_get_device_state(irq_state);
gpriv->gadget.speed = usbhs_bus_get_speed(priv);
dev_dbg(dev, "state = %x : speed : %d\n", state, gpriv->gadget.speed);
if (gpriv->gadget.speed != USB_SPEED_UNKNOWN &&
(state & SUSPENDED_STATE)) {
if (gpriv->driver && gpriv->driver->suspend)
gpriv->driver->suspend(&gpriv->gadget);
usb_gadget_set_state(&gpriv->gadget, USB_STATE_SUSPENDED);
}
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;
case READ_STATUS_STAGE:
case WRITE_STATUS_STAGE:
usbhs_dcp_control_transfer_done(pipe);
fallthrough;
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;
case USB_REQ_SET_FEATURE:
recip_handler = &req_set_feature;
break;
case USB_REQ_GET_STATUS:
recip_handler = &req_get_status;
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;
while (1) {
pkt = usbhs_pkt_pop(pipe, NULL);
if (!pkt)
break;
usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ESHUTDOWN);
}
usbhs_pipe_disable(pipe);
return 0;
}
/*
*
* 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;
unsigned long flags;
usbhs_lock(priv, flags);
/*
* if it already have pipe,
* nothing to do
*/
if (uep->pipe) {
usbhs_pipe_clear(uep->pipe);
usbhs_pipe_sequence_data0(uep->pipe);
ret = 0;
goto usbhsg_ep_enable_end;
}
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;
usbhs_xxxsts_clear(priv, BRDYSTS,
usbhs_pipe_number(pipe));
}
ret = 0;
}
usbhsg_ep_enable_end:
usbhs_unlock(priv, flags);
return ret;
}
static int usbhsg_ep_disable(struct usb_ep *ep)
{
struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
struct usbhs_pipe *pipe;
unsigned long flags;
spin_lock_irqsave(&uep->lock, flags);
pipe = usbhsg_uep_to_pipe(uep);
if (!pipe)
goto out;
usbhsg_pipe_disable(uep);
usbhs_pipe_free(pipe);
uep->pipe->mod_private = NULL;
uep->pipe = NULL;
out:
spin_unlock_irqrestore(&uep->lock, flags);
return 0;
}
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));
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;
unsigned long flags;
spin_lock_irqsave(&uep->lock, flags);
pipe = usbhsg_uep_to_pipe(uep);
if (pipe)
usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
/*
* To dequeue a request, this driver should call the usbhsg_queue_pop()
* even if the pipe is NULL.
*/
usbhsg_queue_pop(uep, ureq, -ECONNRESET);
spin_unlock_irqrestore(&uep->lock, flags);
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;
int ret = 0;
dev_dbg(dev, "set halt %d (pipe %d)\n",
halt, usbhs_pipe_number(pipe));
/******************** spin lock ********************/
usbhs_lock(priv, flags);
/*
* According to usb_ep_set_halt()'s description, this function should
* return -EAGAIN if the IN endpoint has any queue or data. Note
* that the usbhs_pipe_is_dir_in() returns false if the pipe is an
* IN endpoint in the gadget mode.
*/
if (!usbhs_pipe_is_dir_in(pipe) && (__usbhsf_pkt_get(pipe) ||
usbhs_pipe_contains_transmittable_data(pipe))) {
ret = -EAGAIN;
goto out;
}
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);
out:
usbhs_unlock(priv, flags);
/******************** spin unlock ******************/
return ret;
}
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 const 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,
};
/*
* pullup control
*/
static int usbhsg_can_pullup(struct usbhs_priv *priv)
{
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
return gpriv->driver &&
usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT);
}
static void usbhsg_update_pullup(struct usbhs_priv *priv)
{
if (usbhsg_can_pullup(priv))
usbhs_sys_function_pullup(priv, 1);
else
usbhs_sys_function_pullup(priv, 0);
}
/*
* 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_fifo_init(priv);
usbhs_pipe_init(priv,
usbhsg_dma_map_ctrl);
/* dcp init instead of usbhsg_ep_enable() */
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_function_ctrl(priv, 1);
usbhsg_update_pullup(priv);
/*
* 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 *uep;
struct device *dev = usbhs_priv_to_dev(priv);
unsigned long flags;
int ret = 0, i;
/******************** 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_set_test_mode(priv, 0);
usbhs_sys_function_ctrl(priv, 0);
/* disable all eps */
usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
usbhsg_ep_disable(&uep->ep);
dev_dbg(dev, "stop gadget\n");
return 0;
}
/*
* VBUS provided by the PHY
*/
static int usbhsm_phy_get_vbus(struct platform_device *pdev)
{
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
return gpriv->vbus_active;
}
static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
{
struct usbhs_mod_info *info = &priv->mod_info;
info->irq_vbus = NULL;
info->get_vbus = usbhsm_phy_get_vbus;
usbhs_irq_callback_update(priv, NULL);
}
/*
*
* 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 = usbhsg_gpriv_to_priv(gpriv);
struct device *dev = usbhs_priv_to_dev(priv);
int ret;
if (!driver ||
!driver->setup ||
driver->max_speed < USB_SPEED_FULL)
return -EINVAL;
/* connect to bus through transceiver */
if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
ret = otg_set_peripheral(gpriv->transceiver->otg,
&gpriv->gadget);
if (ret) {
dev_err(dev, "%s: can't bind to transceiver\n",
gpriv->gadget.name);
return ret;
}
/* get vbus using phy versions */
usbhs_mod_phy_mode(priv);
}
/* first hook up the driver ... */
gpriv->driver = driver;
return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
}
static int usbhsg_gadget_stop(struct usb_gadget *gadget)
{
struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
if (!IS_ERR_OR_NULL(gpriv->transceiver))
otg_set_peripheral(gpriv->transceiver->otg, NULL);
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 int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
{
struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
unsigned long flags;
usbhs_lock(priv, flags);
if (is_on)
usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
else
usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
usbhsg_update_pullup(priv);
usbhs_unlock(priv, flags);
return 0;
}
static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
{
struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
if (is_self)
usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
else
usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
gadget->is_selfpowered = (is_self != 0);
return 0;
}
static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active)
{
struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
struct platform_device *pdev = usbhs_priv_to_pdev(priv);
gpriv->vbus_active = !!is_active;
usbhsc_schedule_notify_hotplug(pdev);
return 0;
}
static const struct usb_gadget_ops usbhsg_gadget_ops = {
.get_frame = usbhsg_get_frame,
.set_selfpowered = usbhsg_set_selfpowered,
.udc_start = usbhsg_gadget_start,
.udc_stop = usbhsg_gadget_stop,
.pullup = usbhsg_pullup,
.vbus_session = usbhsg_vbus_session,
};
static int usbhsg_start(struct usbhs_priv *priv)
{
return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
}
static int usbhsg_stop(struct usbhs_priv *priv)
{
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
/* cable disconnect */
if (gpriv->driver &&
gpriv->driver->disconnect)
gpriv->driver->disconnect(&gpriv->gadget);
return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
}
int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
{
struct usbhsg_gpriv *gpriv;
struct usbhsg_uep *uep;
struct device *dev = usbhs_priv_to_dev(priv);
struct renesas_usbhs_driver_pipe_config *pipe_configs =
usbhs_get_dparam(priv, pipe_configs);
int pipe_size = usbhs_get_dparam(priv, pipe_size);
int i;
int ret;
gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
if (!gpriv)
return -ENOMEM;
uep = kcalloc(pipe_size, sizeof(struct usbhsg_uep), GFP_KERNEL);
if (!uep) {
ret = -ENOMEM;
goto usbhs_mod_gadget_probe_err_gpriv;
}
gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
dev_info(dev, "%stransceiver found\n",
!IS_ERR(gpriv->transceiver) ? "" : "no ");
/*
* 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
*/
gpriv->gadget.dev.parent = dev;
gpriv->gadget.name = "renesas_usbhs_udc";
gpriv->gadget.ops = &usbhsg_gadget_ops;
gpriv->gadget.max_speed = USB_SPEED_HIGH;
gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv,
has_usb_dmac);
INIT_LIST_HEAD(&gpriv->gadget.ep_list);
/*
* init usb_ep
*/
usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
uep->gpriv = gpriv;
uep->pipe = NULL;
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);
spin_lock_init(&uep->lock);
/* init DCP */
if (usbhsg_is_dcp(uep)) {
gpriv->gadget.ep0 = &uep->ep;
usb_ep_set_maxpacket_limit(&uep->ep, 64);
uep->ep.caps.type_control = true;
} else {
/* init normal pipe */
if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC)
uep->ep.caps.type_iso = true;
if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK)
uep->ep.caps.type_bulk = true;
if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT)
uep->ep.caps.type_int = true;
usb_ep_set_maxpacket_limit(&uep->ep,
pipe_configs[i].bufsize);
list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
}
uep->ep.caps.dir_in = true;
uep->ep.caps.dir_out = true;
}
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 usbhs_mod_gadget_remove(struct usbhs_priv *priv)
{
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
usb_del_gadget_udc(&gpriv->gadget);
kfree(gpriv->uep);
kfree(gpriv);
}
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