diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/usb/renesas_usbhs/mod_gadget.c | 1194 |
1 files changed, 1194 insertions, 0 deletions
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c new file mode 100644 index 000000000..105132ae8 --- /dev/null +++ b/drivers/usb/renesas_usbhs/mod_gadget.c @@ -0,0 +1,1194 @@ +// SPDX-License-Identifier: GPL-1.0+ +/* + * Renesas USB driver + * + * Copyright (C) 2011 Renesas Solutions Corp. + * Copyright (C) 2019 Renesas Electronics Corporation + * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> + */ +#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); +} |