--- /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/io.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include "common.h"
+
+/*
+ *** HARDWARE LIMITATION ***
+ *
+ * 1) renesas_usbhs has a limited number of controllable devices.
+ * it can control only 9 devices in generally.
+ * see DEVADDn / DCPMAXP / PIPEMAXP.
+ *
+ * 2) renesas_usbhs pipe number is limited.
+ * the pipe will be re-used for each devices.
+ * so, software should control DATA0/1 sequence of each devices.
+ */
+
+
+/*
+ * image of mod_host
+ *
+ * +--------+
+ * | udev 0 | --> it is used when set address
+ * +--------+
+ *
+ * +--------+ pipes are reused for each uep.
+ * | udev 1 |-+- [uep 0 (dcp) ] --+ pipe will be switched when
+ * +--------+ | | target device was changed
+ * +- [uep 1 (bulk)] --|---+ +--------------+
+ * | +--------------> | pipe0 (dcp) |
+ * +- [uep 2 (bulk)] --|---|---+ +--------------+
+ * | | | | pipe1 (isoc) |
+ * +--------+ | | | +--------------+
+ * | udev 2 |-+- [uep 0 (dcp) ] --+ +-- |------> | pipe2 (bulk) |
+ * +--------+ | | | | +--------------+
+ * +- [uep 1 (int) ] --|-+ | +------> | pipe3 (bulk) |
+ * | | | | +--------------+
+ * +--------+ | +-|---|------> | pipe4 (int) |
+ * | udev 3 |-+- [uep 0 (dcp) ] --+ | | +--------------+
+ * +--------+ | | | | .... |
+ * +- [uep 1 (bulk)] ------+ | | .... |
+ * | |
+ * +- [uep 2 (bulk)]-----------+
+ */
+
+
+/*
+ * struct
+ */
+struct usbhsh_pipe_info {
+ unsigned int usr_cnt; /* see usbhsh_endpoint_alloc() */
+};
+
+struct usbhsh_request {
+ struct urb *urb;
+ struct usbhs_pkt pkt;
+ struct list_head ureq_link; /* see hpriv :: ureq_link_xxx */
+};
+
+struct usbhsh_device {
+ struct usb_device *usbv;
+ struct list_head ep_list_head; /* list of usbhsh_ep */
+};
+
+struct usbhsh_ep {
+ struct usbhs_pipe *pipe;
+ struct usbhsh_device *udev; /* attached udev */
+ struct list_head ep_list; /* list to usbhsh_device */
+
+ int maxp;
+};
+
+#define USBHSH_DEVICE_MAX 10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
+#define USBHSH_PORT_MAX 7 /* see DEVADDn :: HUBPORT */
+struct usbhsh_hpriv {
+ struct usbhs_mod mod;
+ struct usbhs_pipe *dcp;
+
+ struct usbhsh_device udev[USBHSH_DEVICE_MAX];
+
+ struct usbhsh_pipe_info *pipe_info;
+ int pipe_size;
+
+ u32 port_stat; /* USB_PORT_STAT_xxx */
+
+ struct completion *done;
+
+ /* see usbhsh_req_alloc/free */
+ struct list_head ureq_link_active;
+ struct list_head ureq_link_free;
+};
+
+
+static const char usbhsh_hcd_name[] = "renesas_usbhs host";
+
+/*
+ * macro
+ */
+#define usbhsh_priv_to_hpriv(priv) \
+ container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
+
+#define __usbhsh_for_each_hpipe(start, pos, h, i) \
+ for (i = start, pos = (h)->hpipe + i; \
+ i < (h)->hpipe_size; \
+ i++, pos = (h)->hpipe + i)
+
+#define usbhsh_for_each_hpipe(pos, hpriv, i) \
+ __usbhsh_for_each_hpipe(1, pos, hpriv, i)
+
+#define usbhsh_for_each_hpipe_with_dcp(pos, hpriv, i) \
+ __usbhsh_for_each_hpipe(0, pos, hpriv, i)
+
+#define __usbhsh_for_each_udev(start, pos, h, i) \
+ for (i = start, pos = (h)->udev + i; \
+ i < USBHSH_DEVICE_MAX; \
+ i++, pos = (h)->udev + i)
+
+#define usbhsh_for_each_udev(pos, hpriv, i) \
+ __usbhsh_for_each_udev(1, pos, hpriv, i)
+
+#define usbhsh_for_each_udev_with_dev0(pos, hpriv, i) \
+ __usbhsh_for_each_udev(0, pos, hpriv, i)
+
+#define usbhsh_hcd_to_hpriv(h) (struct usbhsh_hpriv *)((h)->hcd_priv)
+#define usbhsh_hcd_to_dev(h) ((h)->self.controller)
+
+#define usbhsh_hpriv_to_priv(h) ((h)->mod.priv)
+#define usbhsh_hpriv_to_dcp(h) ((h)->dcp)
+#define usbhsh_hpriv_to_hcd(h) \
+ container_of((void *)h, struct usb_hcd, hcd_priv)
+
+#define usbhsh_ep_to_uep(u) ((u)->hcpriv)
+#define usbhsh_uep_to_pipe(u) ((u)->pipe)
+#define usbhsh_uep_to_udev(u) ((u)->udev)
+#define usbhsh_urb_to_ureq(u) ((u)->hcpriv)
+#define usbhsh_urb_to_usbv(u) ((u)->dev)
+
+#define usbhsh_usbv_to_udev(d) dev_get_drvdata(&(d)->dev)
+
+#define usbhsh_udev_to_usbv(h) ((h)->usbv)
+
+#define usbhsh_pipe_info(p) ((p)->mod_private)
+
+#define usbhsh_device_number(h, d) ((int)((d) - (h)->udev))
+#define usbhsh_device_nth(h, d) ((h)->udev + d)
+#define usbhsh_device0(h) usbhsh_device_nth(h, 0)
+
+#define usbhsh_port_stat_init(h) ((h)->port_stat = 0)
+#define usbhsh_port_stat_set(h, s) ((h)->port_stat |= (s))
+#define usbhsh_port_stat_clear(h, s) ((h)->port_stat &= ~(s))
+#define usbhsh_port_stat_get(h) ((h)->port_stat)
+
+#define usbhsh_pkt_to_req(p) \
+ container_of((void *)p, struct usbhsh_request, pkt)
+
+/*
+ * req alloc/free
+ */
+static void usbhsh_req_list_init(struct usbhsh_hpriv *hpriv)
+{
+ INIT_LIST_HEAD(&hpriv->ureq_link_active);
+ INIT_LIST_HEAD(&hpriv->ureq_link_free);
+}
+
+static void usbhsh_req_list_quit(struct usbhsh_hpriv *hpriv)
+{
+ struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+ struct device *dev = usbhsh_hcd_to_dev(hcd);
+ struct usbhsh_request *ureq, *next;
+
+ /* kfree all active ureq */
+ list_for_each_entry_safe(ureq, next,
+ &hpriv->ureq_link_active,
+ ureq_link) {
+ dev_err(dev, "active ureq (%p) is force freed\n", ureq);
+ kfree(ureq);
+ }
+
+ /* kfree all free ureq */
+ list_for_each_entry_safe(ureq, next, &hpriv->ureq_link_free, ureq_link)
+ kfree(ureq);
+}
+
+static struct usbhsh_request *usbhsh_req_alloc(struct usbhsh_hpriv *hpriv,
+ struct urb *urb,
+ gfp_t mem_flags)
+{
+ struct usbhsh_request *ureq;
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+
+ if (list_empty(&hpriv->ureq_link_free)) {
+ /*
+ * create new one if there is no free ureq
+ */
+ ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
+ if (ureq)
+ INIT_LIST_HEAD(&ureq->ureq_link);
+ } else {
+ /*
+ * reuse "free" ureq if exist
+ */
+ ureq = list_entry(hpriv->ureq_link_free.next,
+ struct usbhsh_request,
+ ureq_link);
+ if (ureq)
+ list_del_init(&ureq->ureq_link);
+ }
+
+ if (!ureq) {
+ dev_err(dev, "ureq alloc fail\n");
+ return NULL;
+ }
+
+ usbhs_pkt_init(&ureq->pkt);
+
+ /*
+ * push it to "active" list
+ */
+ list_add_tail(&ureq->ureq_link, &hpriv->ureq_link_active);
+ ureq->urb = urb;
+
+ return ureq;
+}
+
+static void usbhsh_req_free(struct usbhsh_hpriv *hpriv,
+ struct usbhsh_request *ureq)
+{
+ struct usbhs_pkt *pkt = &ureq->pkt;
+
+ usbhs_pkt_init(pkt);
+
+ /*
+ * removed from "active" list,
+ * and push it to "free" list
+ */
+ ureq->urb = NULL;
+ list_del_init(&ureq->ureq_link);
+ list_add_tail(&ureq->ureq_link, &hpriv->ureq_link_free);
+}
+
+/*
+ * device control
+ */
+
+static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
+{
+ return !list_empty(&udev->ep_list_head);
+}
+
+static struct usbhsh_device *usbhsh_device_alloc(struct usbhsh_hpriv *hpriv,
+ struct urb *urb)
+{
+ struct usbhsh_device *udev = NULL;
+ struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+ struct device *dev = usbhsh_hcd_to_dev(hcd);
+ struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ int i;
+
+ /*
+ * device 0
+ */
+ if (0 == usb_pipedevice(urb->pipe)) {
+ udev = usbhsh_device0(hpriv);
+ goto usbhsh_device_find;
+ }
+
+ /*
+ * find unused device
+ */
+ usbhsh_for_each_udev(udev, hpriv, i) {
+ if (usbhsh_udev_to_usbv(udev))
+ continue;
+ goto usbhsh_device_find;
+ }
+
+ dev_err(dev, "no free usbhsh_device\n");
+
+ return NULL;
+
+usbhsh_device_find:
+ if (usbhsh_device_has_endpoint(udev))
+ dev_warn(dev, "udev have old endpoint\n");
+
+ /* uep will be attached */
+ INIT_LIST_HEAD(&udev->ep_list_head);
+
+ /*
+ * usbhsh_usbv_to_udev()
+ * usbhsh_udev_to_usbv()
+ * will be enable
+ */
+ dev_set_drvdata(&usbv->dev, udev);
+ udev->usbv = usbv;
+
+ /* set device config */
+ usbhs_set_device_speed(priv,
+ usbhsh_device_number(hpriv, udev),
+ usbhsh_device_number(hpriv, udev),
+ 0, /* FIXME no parent */
+ usbv->speed);
+
+ dev_dbg(dev, "%s [%d](%p)\n", __func__,
+ usbhsh_device_number(hpriv, udev), udev);
+
+ return udev;
+}
+
+static void usbhsh_device_free(struct usbhsh_hpriv *hpriv,
+ struct usbhsh_device *udev)
+{
+ struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+ struct device *dev = usbhsh_hcd_to_dev(hcd);
+ struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
+
+ dev_dbg(dev, "%s [%d](%p)\n", __func__,
+ usbhsh_device_number(hpriv, udev), udev);
+
+ if (usbhsh_device_has_endpoint(udev))
+ dev_warn(dev, "udev still have endpoint\n");
+
+ /*
+ * usbhsh_usbv_to_udev()
+ * usbhsh_udev_to_usbv()
+ * will be disable
+ */
+ dev_set_drvdata(&usbv->dev, NULL);
+ udev->usbv = NULL;
+}
+
+/*
+ * end-point control
+ */
+struct usbhsh_ep *usbhsh_endpoint_alloc(struct usbhsh_hpriv *hpriv,
+ struct usbhsh_device *udev,
+ struct usb_host_endpoint *ep,
+ gfp_t mem_flags)
+{
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+ struct usbhsh_ep *uep;
+ struct usbhsh_pipe_info *info;
+ struct usbhs_pipe *pipe, *best_pipe;
+ struct device *dev = usbhsh_hcd_to_dev(hcd);
+ struct usb_endpoint_descriptor *desc = &ep->desc;
+ int type, i;
+ unsigned int min_usr;
+
+ uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
+ if (!uep) {
+ dev_err(dev, "usbhsh_ep alloc fail\n");
+ return NULL;
+ }
+ type = usb_endpoint_type(desc);
+
+ /*
+ * find best pipe for endpoint
+ * see
+ * HARDWARE LIMITATION
+ */
+ min_usr = ~0;
+ best_pipe = NULL;
+ usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
+ if (!usbhs_pipe_type_is(pipe, type))
+ continue;
+
+ info = usbhsh_pipe_info(pipe);
+
+ if (min_usr > info->usr_cnt) {
+ min_usr = info->usr_cnt;
+ best_pipe = pipe;
+ }
+ }
+
+ if (unlikely(!best_pipe)) {
+ dev_err(dev, "couldn't find best pipe\n");
+ kfree(uep);
+ return NULL;
+ }
+
+ /*
+ * init uep
+ */
+ uep->pipe = best_pipe;
+ uep->maxp = usb_endpoint_maxp(desc);
+ usbhsh_uep_to_udev(uep) = udev;
+ usbhsh_ep_to_uep(ep) = uep;
+
+ /*
+ * update pipe user count
+ */
+ info = usbhsh_pipe_info(best_pipe);
+ info->usr_cnt++;
+
+ /* init this endpoint, and attach it to udev */
+ INIT_LIST_HEAD(&uep->ep_list);
+ list_add_tail(&uep->ep_list, &udev->ep_list_head);
+
+ /*
+ * usbhs_pipe_config_update() should be called after
+ * usbhs_device_config()
+ * see
+ * DCPMAXP/PIPEMAXP
+ */
+ usbhs_pipe_config_update(uep->pipe,
+ usbhsh_device_number(hpriv, udev),
+ usb_endpoint_num(desc),
+ uep->maxp);
+
+ dev_dbg(dev, "%s [%d-%s](%p)\n", __func__,
+ usbhsh_device_number(hpriv, udev),
+ usbhs_pipe_name(pipe), uep);
+
+ return uep;
+}
+
+void usbhsh_endpoint_free(struct usbhsh_hpriv *hpriv,
+ struct usb_host_endpoint *ep)
+{
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+ struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
+ struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
+ struct usbhsh_pipe_info *info;
+
+ if (!uep)
+ return;
+
+ dev_dbg(dev, "%s [%d-%s](%p)\n", __func__,
+ usbhsh_device_number(hpriv, udev),
+ usbhs_pipe_name(uep->pipe), uep);
+
+ info = usbhsh_pipe_info(uep->pipe);
+ info->usr_cnt--;
+
+ /* remove this endpoint from udev */
+ list_del_init(&uep->ep_list);
+
+ usbhsh_uep_to_udev(uep) = NULL;
+ usbhsh_ep_to_uep(ep) = NULL;
+
+ kfree(uep);
+}
+
+/*
+ * queue push/pop
+ */
+static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
+{
+ struct usbhsh_request *ureq = usbhsh_pkt_to_req(pkt);
+ struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+ struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+ struct urb *urb = ureq->urb;
+ struct device *dev = usbhs_priv_to_dev(priv);
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ if (!urb) {
+ dev_warn(dev, "pkt doesn't have urb\n");
+ return;
+ }
+
+ urb->actual_length = pkt->actual;
+ usbhsh_req_free(hpriv, ureq);
+ usbhsh_urb_to_ureq(urb) = NULL;
+
+ usb_hcd_unlink_urb_from_ep(hcd, urb);
+ usb_hcd_giveback_urb(hcd, urb, 0);
+}
+
+static int usbhsh_queue_push(struct usb_hcd *hcd,
+ struct usbhs_pipe *pipe,
+ struct urb *urb)
+{
+ struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
+ struct usbhs_pkt *pkt = &ureq->pkt;
+ struct device *dev = usbhsh_hcd_to_dev(hcd);
+ void *buf;
+ int len;
+
+ if (usb_pipeisoc(urb->pipe)) {
+ dev_err(dev, "pipe iso is not supported now\n");
+ return -EIO;
+ }
+
+ if (usb_pipein(urb->pipe))
+ pipe->handler = &usbhs_fifo_pio_pop_handler;
+ else
+ pipe->handler = &usbhs_fifo_pio_push_handler;
+
+ buf = (void *)(urb->transfer_buffer + urb->actual_length);
+ len = urb->transfer_buffer_length - urb->actual_length;
+
+ dev_dbg(dev, "%s\n", __func__);
+ usbhs_pkt_push(pipe, pkt, usbhsh_queue_done,
+ buf, len, (urb->transfer_flags & URB_ZERO_PACKET));
+ usbhs_pkt_start(pipe);
+
+ return 0;
+}
+
+/*
+ * DCP setup stage
+ */
+static int usbhsh_is_request_address(struct urb *urb)
+{
+ struct usb_ctrlrequest *cmd;
+
+ cmd = (struct usb_ctrlrequest *)urb->setup_packet;
+
+ if ((DeviceOutRequest == cmd->bRequestType << 8) &&
+ (USB_REQ_SET_ADDRESS == cmd->bRequest))
+ return 1;
+ else
+ return 0;
+}
+
+static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
+ struct urb *urb,
+ struct usbhs_pipe *pipe)
+{
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ struct usb_ctrlrequest req;
+ struct device *dev = usbhs_priv_to_dev(priv);
+
+ /*
+ * wait setup packet ACK
+ * see
+ * usbhsh_irq_setup_ack()
+ * usbhsh_irq_setup_err()
+ */
+ DECLARE_COMPLETION(done);
+ hpriv->done = &done;
+
+ /* copy original request */
+ memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
+
+ /*
+ * renesas_usbhs can not use original usb address.
+ * see HARDWARE LIMITATION.
+ * modify usb address here.
+ */
+ if (usbhsh_is_request_address(urb)) {
+ /* FIXME */
+ req.wValue = 1;
+ dev_dbg(dev, "create new address - %d\n", req.wValue);
+ }
+
+ /* set request */
+ usbhs_usbreq_set_val(priv, &req);
+
+ /*
+ * wait setup packet ACK
+ */
+ wait_for_completion(&done);
+ hpriv->done = NULL;
+
+ dev_dbg(dev, "%s done\n", __func__);
+}
+
+/*
+ * DCP data stage
+ */
+static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
+ struct usbhs_pkt *pkt)
+{
+ struct usbhsh_request *ureq = usbhsh_pkt_to_req(pkt);
+ struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+ struct urb *urb = ureq->urb;
+
+ /* this ureq was connected to urb when usbhsh_urb_enqueue() */
+
+ usbhsh_req_free(hpriv, ureq);
+ usbhsh_urb_to_ureq(urb) = NULL;
+}
+
+static void usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
+ struct urb *urb,
+ struct usbhs_pipe *pipe)
+{
+ struct usbhsh_request *ureq;
+ struct usbhs_pkt *pkt;
+
+ /*
+ * FIXME
+ *
+ * data stage uses ureq which is connected to urb
+ * see usbhsh_urb_enqueue() :: alloc new request.
+ * it will be freed in usbhsh_data_stage_packet_done()
+ */
+ ureq = usbhsh_urb_to_ureq(urb);
+ pkt = &ureq->pkt;
+
+ if (usb_pipein(urb->pipe))
+ pipe->handler = &usbhs_dcp_data_stage_in_handler;
+ else
+ pipe->handler = &usbhs_dcp_data_stage_out_handler;
+
+ usbhs_pkt_push(pipe, pkt,
+ usbhsh_data_stage_packet_done,
+ urb->transfer_buffer,
+ urb->transfer_buffer_length,
+ (urb->transfer_flags & URB_ZERO_PACKET));
+}
+
+/*
+ * DCP status stage
+ */
+static void usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
+ struct urb *urb,
+ struct usbhs_pipe *pipe)
+{
+ struct usbhsh_request *ureq;
+ struct usbhs_pkt *pkt;
+
+ /*
+ * FIXME
+ *
+ * status stage uses allocated ureq.
+ * it will be freed on usbhsh_queue_done()
+ */
+ ureq = usbhsh_req_alloc(hpriv, urb, GFP_KERNEL);
+ pkt = &ureq->pkt;
+
+ if (usb_pipein(urb->pipe))
+ pipe->handler = &usbhs_dcp_status_stage_in_handler;
+ else
+ pipe->handler = &usbhs_dcp_status_stage_out_handler;
+
+ usbhs_pkt_push(pipe, pkt,
+ usbhsh_queue_done,
+ NULL,
+ urb->transfer_buffer_length,
+ 0);
+}
+
+static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
+ struct usbhsh_hpriv *hpriv,
+ struct usbhs_pipe *pipe,
+ struct urb *urb)
+{
+ struct device *dev = usbhsh_hcd_to_dev(hcd);
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ /*
+ * setup stage
+ *
+ * usbhsh_send_setup_stage_packet() wait SACK/SIGN
+ */
+ usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
+
+ /*
+ * data stage
+ *
+ * It is pushed only when urb has buffer.
+ */
+ if (urb->transfer_buffer_length)
+ usbhsh_data_stage_packet_push(hpriv, urb, pipe);
+
+ /*
+ * status stage
+ */
+ usbhsh_status_stage_packet_push(hpriv, urb, pipe);
+
+ /*
+ * start pushed packets
+ */
+ usbhs_pkt_start(pipe);
+
+ return 0;
+}
+
+/*
+ * dma map functions
+ */
+static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
+{
+ return 0;
+}
+
+/*
+ * for hc_driver
+ */
+static int usbhsh_host_start(struct usb_hcd *hcd)
+{
+ return 0;
+}
+
+static void usbhsh_host_stop(struct usb_hcd *hcd)
+{
+}
+
+static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
+ struct urb *urb,
+ gfp_t mem_flags)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+ struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
+ struct usb_host_endpoint *ep = urb->ep;
+ struct usbhsh_request *ureq;
+ struct usbhsh_device *udev, *new_udev = NULL;
+ struct usbhs_pipe *pipe;
+ struct usbhsh_ep *uep;
+
+ int ret;
+
+ dev_dbg(dev, "%s (%s)\n",
+ __func__, usb_pipein(urb->pipe) ? "in" : "out");
+
+ ret = usb_hcd_link_urb_to_ep(hcd, urb);
+ if (ret)
+ goto usbhsh_urb_enqueue_error_not_linked;
+
+ /*
+ * get udev
+ */
+ udev = usbhsh_usbv_to_udev(usbv);
+ if (!udev) {
+ new_udev = usbhsh_device_alloc(hpriv, urb);
+ if (!new_udev)
+ goto usbhsh_urb_enqueue_error_not_linked;
+
+ udev = new_udev;
+ }
+
+ /*
+ * get uep
+ */
+ uep = usbhsh_ep_to_uep(ep);
+ if (!uep) {
+ uep = usbhsh_endpoint_alloc(hpriv, udev, ep, mem_flags);
+ if (!uep)
+ goto usbhsh_urb_enqueue_error_free_device;
+ }
+ pipe = usbhsh_uep_to_pipe(uep);
+
+ /*
+ * alloc new request
+ */
+ ureq = usbhsh_req_alloc(hpriv, urb, mem_flags);
+ if (unlikely(!ureq)) {
+ ret = -ENOMEM;
+ goto usbhsh_urb_enqueue_error_free_endpoint;
+ }
+ usbhsh_urb_to_ureq(urb) = ureq;
+
+ /*
+ * push packet
+ */
+ if (usb_pipecontrol(urb->pipe))
+ usbhsh_dcp_queue_push(hcd, hpriv, pipe, urb);
+ else
+ usbhsh_queue_push(hcd, pipe, urb);
+
+ return 0;
+
+usbhsh_urb_enqueue_error_free_endpoint:
+ usbhsh_endpoint_free(hpriv, ep);
+usbhsh_urb_enqueue_error_free_device:
+ if (new_udev)
+ usbhsh_device_free(hpriv, new_udev);
+usbhsh_urb_enqueue_error_not_linked:
+
+ dev_dbg(dev, "%s error\n", __func__);
+
+ return ret;
+}
+
+static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
+ struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
+
+ if (ureq) {
+ usbhsh_req_free(hpriv, ureq);
+ usbhsh_urb_to_ureq(urb) = NULL;
+ }
+
+ return 0;
+}
+
+static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
+ struct usb_host_endpoint *ep)
+{
+ struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
+ struct usbhsh_device *udev;
+ struct usbhsh_hpriv *hpriv;
+
+ /*
+ * this function might be called manytimes by same hcd/ep
+ * in-endpoitn == out-endpoint if ep == dcp.
+ */
+ if (!uep)
+ return;
+
+ udev = usbhsh_uep_to_udev(uep);
+ hpriv = usbhsh_hcd_to_hpriv(hcd);
+
+ usbhsh_endpoint_free(hpriv, ep);
+ ep->hcpriv = NULL;
+
+ /*
+ * if there is no endpoint,
+ * free device
+ */
+ if (!usbhsh_device_has_endpoint(udev))
+ usbhsh_device_free(hpriv, udev);
+}
+
+static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int roothub_id = 1; /* only 1 root hub */
+
+ /*
+ * does port stat was changed ?
+ * check USB_PORT_STAT_C_xxx << 16
+ */
+ if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
+ *buf = (1 << roothub_id);
+ else
+ *buf = 0;
+
+ dev_dbg(dev, "%s (%02x)\n", __func__, *buf);
+
+ return !!(*buf);
+}
+
+static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
+ u16 typeReq, u16 wValue,
+ u16 wIndex, char *buf, u16 wLength)
+{
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+
+ switch (wValue) {
+ case C_HUB_OVER_CURRENT:
+ case C_HUB_LOCAL_POWER:
+ dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
+ return 0;
+ }
+
+ return -EPIPE;
+}
+
+static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
+ u16 typeReq, u16 wValue,
+ u16 wIndex, char *buf, u16 wLength)
+{
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int enable = (typeReq == SetPortFeature);
+ int speed, i, timeout = 128;
+ int roothub_id = 1; /* only 1 root hub */
+
+ /* common error */
+ if (wIndex > roothub_id || wLength != 0)
+ return -EPIPE;
+
+ /* check wValue */
+ switch (wValue) {
+ case USB_PORT_FEAT_POWER:
+ usbhs_vbus_ctrl(priv, enable);
+ dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
+ break;
+
+ case USB_PORT_FEAT_ENABLE:
+ case USB_PORT_FEAT_SUSPEND:
+ case USB_PORT_FEAT_C_ENABLE:
+ case USB_PORT_FEAT_C_SUSPEND:
+ case USB_PORT_FEAT_C_CONNECTION:
+ case USB_PORT_FEAT_C_OVER_CURRENT:
+ case USB_PORT_FEAT_C_RESET:
+ dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
+ break;
+
+ case USB_PORT_FEAT_RESET:
+ if (!enable)
+ break;
+
+ usbhsh_port_stat_clear(hpriv,
+ USB_PORT_STAT_HIGH_SPEED |
+ USB_PORT_STAT_LOW_SPEED);
+
+ usbhs_bus_send_reset(priv);
+ msleep(20);
+ usbhs_bus_send_sof_enable(priv);
+
+ for (i = 0; i < timeout ; i++) {
+ switch (usbhs_bus_get_speed(priv)) {
+ case USB_SPEED_LOW:
+ speed = USB_PORT_STAT_LOW_SPEED;
+ goto got_usb_bus_speed;
+ case USB_SPEED_HIGH:
+ speed = USB_PORT_STAT_HIGH_SPEED;
+ goto got_usb_bus_speed;
+ case USB_SPEED_FULL:
+ speed = 0;
+ goto got_usb_bus_speed;
+ }
+
+ msleep(20);
+ }
+ return -EPIPE;
+
+got_usb_bus_speed:
+ usbhsh_port_stat_set(hpriv, speed);
+ usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
+
+ dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
+ __func__, speed);
+
+ /* status change is not needed */
+ return 0;
+
+ default:
+ return -EPIPE;
+ }
+
+ /* set/clear status */
+ if (enable)
+ usbhsh_port_stat_set(hpriv, (1 << wValue));
+ else
+ usbhsh_port_stat_clear(hpriv, (1 << wValue));
+
+ return 0;
+}
+
+static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
+ u16 typeReq, u16 wValue,
+ u16 wIndex, char *buf, u16 wLength)
+{
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int roothub_id = 1; /* only 1 root hub */
+
+ switch (typeReq) {
+ case GetHubStatus:
+ dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
+
+ *buf = 0x00;
+ break;
+
+ case GetPortStatus:
+ if (wIndex != roothub_id)
+ return -EPIPE;
+
+ dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
+ *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
+ break;
+
+ case GetHubDescriptor:
+ desc->bDescriptorType = 0x29;
+ desc->bHubContrCurrent = 0;
+ desc->bNbrPorts = roothub_id;
+ desc->bDescLength = 9;
+ desc->bPwrOn2PwrGood = 0;
+ desc->wHubCharacteristics = cpu_to_le16(0x0011);
+ desc->u.hs.DeviceRemovable[0] = (roothub_id << 1);
+ desc->u.hs.DeviceRemovable[1] = ~0;
+ dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
+ break;
+ }
+
+ return 0;
+}
+
+static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+ u16 wIndex, char *buf, u16 wLength)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
+ struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int ret = -EPIPE;
+
+ switch (typeReq) {
+
+ /* Hub Feature */
+ case ClearHubFeature:
+ case SetHubFeature:
+ ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
+ wValue, wIndex, buf, wLength);
+ break;
+
+ /* Port Feature */
+ case SetPortFeature:
+ case ClearPortFeature:
+ ret = __usbhsh_hub_port_feature(hpriv, typeReq,
+ wValue, wIndex, buf, wLength);
+ break;
+
+ /* Get status */
+ case GetHubStatus:
+ case GetPortStatus:
+ case GetHubDescriptor:
+ ret = __usbhsh_hub_get_status(hpriv, typeReq,
+ wValue, wIndex, buf, wLength);
+ break;
+ }
+
+ dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
+ typeReq, ret, usbhsh_port_stat_get(hpriv));
+
+ return ret;
+}
+
+static struct hc_driver usbhsh_driver = {
+ .description = usbhsh_hcd_name,
+ .hcd_priv_size = sizeof(struct usbhsh_hpriv),
+
+ /*
+ * generic hardware linkage
+ */
+ .flags = HCD_USB2,
+
+ .start = usbhsh_host_start,
+ .stop = usbhsh_host_stop,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = usbhsh_urb_enqueue,
+ .urb_dequeue = usbhsh_urb_dequeue,
+ .endpoint_disable = usbhsh_endpoint_disable,
+
+ /*
+ * root hub
+ */
+ .hub_status_data = usbhsh_hub_status_data,
+ .hub_control = usbhsh_hub_control,
+};
+
+/*
+ * interrupt functions
+ */
+static int usbhsh_irq_attch(struct usbhs_priv *priv,
+ struct usbhs_irq_state *irq_state)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+
+ dev_dbg(dev, "device attached\n");
+
+ usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
+ usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
+
+ return 0;
+}
+
+static int usbhsh_irq_dtch(struct usbhs_priv *priv,
+ struct usbhs_irq_state *irq_state)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+
+ dev_dbg(dev, "device detached\n");
+
+ usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
+ usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
+
+ return 0;
+}
+
+static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
+ struct usbhs_irq_state *irq_state)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+
+ dev_dbg(dev, "setup packet OK\n");
+
+ if (unlikely(!hpriv->done))
+ dev_err(dev, "setup ack happen without necessary data\n");
+ else
+ complete(hpriv->done); /* see usbhsh_urb_enqueue() */
+
+ return 0;
+}
+
+static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
+ struct usbhs_irq_state *irq_state)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+
+ dev_dbg(dev, "setup packet Err\n");
+
+ if (unlikely(!hpriv->done))
+ dev_err(dev, "setup err happen without necessary data\n");
+ else
+ complete(hpriv->done); /* see usbhsh_urb_enqueue() */
+
+ return 0;
+}
+
+/*
+ * module start/stop
+ */
+static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+ struct usbhsh_pipe_info *pipe_info = hpriv->pipe_info;
+ struct usbhs_pipe *pipe;
+ u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
+ int pipe_size = usbhs_get_dparam(priv, pipe_size);
+ int old_type, dir_in, i;
+
+ /* init all pipe */
+ old_type = USB_ENDPOINT_XFER_CONTROL;
+ for (i = 0; i < pipe_size; i++) {
+ pipe_info[i].usr_cnt = 0;
+
+ /*
+ * data "output" will be finished as soon as possible,
+ * but there is no guaranty at data "input" case.
+ *
+ * "input" needs "standby" pipe.
+ * So, "input" direction pipe > "output" direction pipe
+ * is good idea.
+ *
+ * 1st USB_ENDPOINT_XFER_xxx will be output direction,
+ * and the other will be input direction here.
+ *
+ * ex)
+ * ...
+ * USB_ENDPOINT_XFER_ISOC -> dir out
+ * USB_ENDPOINT_XFER_ISOC -> dir in
+ * USB_ENDPOINT_XFER_BULK -> dir out
+ * USB_ENDPOINT_XFER_BULK -> dir in
+ * USB_ENDPOINT_XFER_BULK -> dir in
+ * ...
+ */
+ dir_in = (pipe_type[i] == old_type);
+ old_type = pipe_type[i];
+
+ if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
+ pipe = usbhs_dcp_malloc(priv);
+ usbhsh_hpriv_to_dcp(hpriv) = pipe;
+ } else {
+ pipe = usbhs_pipe_malloc(priv,
+ pipe_type[i],
+ dir_in);
+ }
+
+ pipe->mod_private = pipe_info + i;
+ }
+}
+
+static int usbhsh_start(struct usbhs_priv *priv)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+ struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+ struct usbhs_mod *mod = usbhs_mod_get_current(priv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int ret;
+
+ /* add hcd */
+ ret = usb_add_hcd(hcd, 0, 0);
+ if (ret < 0)
+ return 0;
+
+ /*
+ * pipe initialize and enable DCP
+ */
+ usbhs_pipe_init(priv,
+ usbhsh_dma_map_ctrl);
+ usbhs_fifo_init(priv);
+ usbhsh_pipe_init_for_host(priv);
+
+ /*
+ * system config enble
+ * - HI speed
+ * - host
+ * - usb module
+ */
+ usbhs_sys_hispeed_ctrl(priv, 1);
+ usbhs_sys_host_ctrl(priv, 1);
+ usbhs_sys_usb_ctrl(priv, 1);
+
+ /*
+ * enable irq callback
+ */
+ mod->irq_attch = usbhsh_irq_attch;
+ mod->irq_dtch = usbhsh_irq_dtch;
+ mod->irq_sack = usbhsh_irq_setup_ack;
+ mod->irq_sign = usbhsh_irq_setup_err;
+ usbhs_irq_callback_update(priv, mod);
+
+ dev_dbg(dev, "start host\n");
+
+ return ret;
+}
+
+static int usbhsh_stop(struct usbhs_priv *priv)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+ struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+
+ usb_remove_hcd(hcd);
+
+ /* disable sys */
+ usbhs_sys_hispeed_ctrl(priv, 0);
+ usbhs_sys_host_ctrl(priv, 0);
+ usbhs_sys_usb_ctrl(priv, 0);
+
+ dev_dbg(dev, "quit host\n");
+
+ return 0;
+}
+
+int __devinit usbhs_mod_host_probe(struct usbhs_priv *priv)
+{
+ struct usbhsh_hpriv *hpriv;
+ struct usb_hcd *hcd;
+ struct usbhsh_pipe_info *pipe_info;
+ struct usbhsh_device *udev;
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int pipe_size = usbhs_get_dparam(priv, pipe_size);
+ int i;
+
+ /* initialize hcd */
+ hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
+ if (!hcd) {
+ dev_err(dev, "Failed to create hcd\n");
+ return -ENOMEM;
+ }
+
+ pipe_info = kzalloc(sizeof(*pipe_info) * pipe_size, GFP_KERNEL);
+ if (!pipe_info) {
+ dev_err(dev, "Could not allocate pipe_info\n");
+ goto usbhs_mod_host_probe_err;
+ }
+
+ /*
+ * 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 "usbhsh_start"
+ */
+
+ hpriv = usbhsh_hcd_to_hpriv(hcd);
+
+ /*
+ * register itself
+ */
+ usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
+
+ /* init hpriv */
+ hpriv->mod.name = "host";
+ hpriv->mod.start = usbhsh_start;
+ hpriv->mod.stop = usbhsh_stop;
+ hpriv->pipe_info = pipe_info;
+ hpriv->pipe_size = pipe_size;
+ hpriv->done = NULL;
+ usbhsh_req_list_init(hpriv);
+ usbhsh_port_stat_init(hpriv);
+
+ /* init all device */
+ usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
+ udev->usbv = NULL;
+ INIT_LIST_HEAD(&udev->ep_list_head);
+ }
+
+ dev_info(dev, "host probed\n");
+
+ return 0;
+
+usbhs_mod_host_probe_err:
+ usb_put_hcd(hcd);
+
+ return -ENOMEM;
+}
+
+int __devexit usbhs_mod_host_remove(struct usbhs_priv *priv)
+{
+ struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
+ struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+
+ usbhsh_req_list_quit(hpriv);
+
+ usb_put_hcd(hcd);
+
+ return 0;
+}
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff