--- /dev/null
+/*
+ * 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/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 "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 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)
+#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);
+
+ 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);
+
+ 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, -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 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;
+ struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
+ struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+ 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(&gpriv->gadget, req, dir);
+ if (ret < 0)
+ return ret;
+
+ pkt->dma = req->dma;
+ } else {
+ usb_gadget_unmap_request(&gpriv->gadget, 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;
+ unsigned short *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);
+ dev_err(dev, "recip data allocation fail\n");
+ 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);
+
+ 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;
+ case READ_STATUS_STAGE:
+ case WRITE_STATUS_STAGE:
+ usbhs_dcp_control_transfer_done(pipe);
+ 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), -ECONNRESET);
+ }
+
+ 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;
+
+ /*
+ * if it already have pipe,
+ * nothing to do
+ */
+ if (uep->pipe) {
+ usbhs_pipe_clear(uep->pipe);
+ usbhs_pipe_sequence_data0(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);
+ struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+
+ if (!pipe)
+ return -EINVAL;
+
+ usbhsg_pipe_disable(uep);
+ usbhs_pipe_free(pipe);
+
+ uep->pipe->mod_private = NULL;
+ uep->pipe = NULL;
+
+ 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 = 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,
+};
+
+/*
+ * 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 *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_set_test_mode(priv, 0);
+ usbhs_sys_function_ctrl(priv, 0);
+
+ usbhsg_ep_disable(&dcp->ep);
+
+ 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 = usbhsg_gpriv_to_priv(gpriv);
+
+ if (!driver ||
+ !driver->setup ||
+ driver->max_speed < USB_SPEED_FULL)
+ return -EINVAL;
+
+ /* 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);
+ 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 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,
+};
+
+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);
+ 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
+ */
+ gpriv->gadget.dev.parent = dev;
+ gpriv->gadget.name = "renesas_usbhs_udc";
+ gpriv->gadget.ops = &usbhsg_gadget_ops;
+ gpriv->gadget.max_speed = USB_SPEED_HIGH;
+
+ 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);
+
+ /* init DCP */
+ if (usbhsg_is_dcp(uep)) {
+ gpriv->gadget.ep0 = &uep->ep;
+ usb_ep_set_maxpacket_limit(&uep->ep, 64);
+ }
+ /* init normal pipe */
+ else {
+ usb_ep_set_maxpacket_limit(&uep->ep, 512);
+ list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
+ }
+ }
+
+ 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);
+}
Code Review / kvmfornfv.git / blobdiff