![Yoshihiro Shimoda](/assets/img/avatar_default.png)
This patch fixes an issue that usbhsg_queue_done() may cause kernel
panic when dma callback is running and usb_ep_disable() is called
by interrupt handler. (Especially, we can reproduce this issue using
g_audio with usb-dmac driver.)
For example of a flow:
usbhsf_dma_complete (on tasklet)
--> usbhsf_pkt_handler (on tasklet)
--> usbhsg_queue_done (on tasklet)
*** interrupt happened and usb_ep_disable() is called ***
--> usbhsg_queue_pop (on tasklet)
Then, oops happened.
Fixes: e73a989
("usb: renesas_usbhs: add DMAEngine support")
Cc: <stable@vger.kernel.org> # v3.1+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
1163 lines
28 KiB
C
1163 lines
28 KiB
C
/*
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* Renesas USB driver
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*
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* Copyright (C) 2011 Renesas Solutions Corp.
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include <linux/usb/otg.h>
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#include "common.h"
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/*
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* struct
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*/
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struct usbhsg_request {
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struct usb_request req;
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struct usbhs_pkt pkt;
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};
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#define EP_NAME_SIZE 8
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struct usbhsg_gpriv;
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struct usbhsg_uep {
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struct usb_ep ep;
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struct usbhs_pipe *pipe;
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char ep_name[EP_NAME_SIZE];
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struct usbhsg_gpriv *gpriv;
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};
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struct usbhsg_gpriv {
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struct usb_gadget gadget;
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struct usbhs_mod mod;
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struct usbhsg_uep *uep;
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int uep_size;
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struct usb_gadget_driver *driver;
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struct usb_phy *transceiver;
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bool vbus_active;
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u32 status;
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#define USBHSG_STATUS_STARTED (1 << 0)
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#define USBHSG_STATUS_REGISTERD (1 << 1)
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#define USBHSG_STATUS_WEDGE (1 << 2)
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#define USBHSG_STATUS_SELF_POWERED (1 << 3)
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#define USBHSG_STATUS_SOFT_CONNECT (1 << 4)
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};
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struct usbhsg_recip_handle {
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char *name;
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int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl);
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int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl);
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int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl);
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};
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/*
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* macro
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*/
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#define usbhsg_priv_to_gpriv(priv) \
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container_of( \
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usbhs_mod_get(priv, USBHS_GADGET), \
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struct usbhsg_gpriv, mod)
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#define __usbhsg_for_each_uep(start, pos, g, i) \
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for ((i) = start; \
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((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \
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(i)++)
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#define usbhsg_for_each_uep(pos, gpriv, i) \
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__usbhsg_for_each_uep(1, pos, gpriv, i)
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#define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \
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__usbhsg_for_each_uep(0, pos, gpriv, i)
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#define usbhsg_gadget_to_gpriv(g)\
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container_of(g, struct usbhsg_gpriv, gadget)
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#define usbhsg_req_to_ureq(r)\
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container_of(r, struct usbhsg_request, req)
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#define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep)
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#define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv)
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#define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv)
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#define usbhsg_gpriv_to_dcp(gp) ((gp)->uep)
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#define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i)
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#define usbhsg_uep_to_gpriv(u) ((u)->gpriv)
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#define usbhsg_uep_to_pipe(u) ((u)->pipe)
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#define usbhsg_pipe_to_uep(p) ((p)->mod_private)
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#define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
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#define usbhsg_ureq_to_pkt(u) (&(u)->pkt)
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#define usbhsg_pkt_to_ureq(i) \
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container_of(i, struct usbhsg_request, pkt)
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#define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
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/* status */
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#define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0)
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#define usbhsg_status_set(gp, b) (gp->status |= b)
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#define usbhsg_status_clr(gp, b) (gp->status &= ~b)
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#define usbhsg_status_has(gp, b) (gp->status & b)
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/*
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* queue push/pop
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*/
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static void __usbhsg_queue_pop(struct usbhsg_uep *uep,
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struct usbhsg_request *ureq,
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int status)
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{
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struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
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struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
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struct device *dev = usbhsg_gpriv_to_dev(gpriv);
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struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
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if (pipe)
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dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
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ureq->req.status = status;
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spin_unlock(usbhs_priv_to_lock(priv));
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usb_gadget_giveback_request(&uep->ep, &ureq->req);
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spin_lock(usbhs_priv_to_lock(priv));
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}
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static void usbhsg_queue_pop(struct usbhsg_uep *uep,
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struct usbhsg_request *ureq,
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int status)
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{
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struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
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struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
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unsigned long flags;
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usbhs_lock(priv, flags);
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__usbhsg_queue_pop(uep, ureq, status);
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usbhs_unlock(priv, flags);
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}
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static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
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{
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struct usbhs_pipe *pipe = pkt->pipe;
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struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
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struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
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unsigned long flags;
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ureq->req.actual = pkt->actual;
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usbhs_lock(priv, flags);
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if (uep)
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__usbhsg_queue_pop(uep, ureq, 0);
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usbhs_unlock(priv, flags);
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}
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static void usbhsg_queue_push(struct usbhsg_uep *uep,
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struct usbhsg_request *ureq)
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{
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struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
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struct device *dev = usbhsg_gpriv_to_dev(gpriv);
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struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
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struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
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struct usb_request *req = &ureq->req;
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req->actual = 0;
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req->status = -EINPROGRESS;
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usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
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req->buf, req->length, req->zero, -1);
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usbhs_pkt_start(pipe);
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dev_dbg(dev, "pipe %d : queue push (%d)\n",
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usbhs_pipe_number(pipe),
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req->length);
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}
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/*
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* dma map/unmap
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*/
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static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
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{
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struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
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struct usb_request *req = &ureq->req;
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struct usbhs_pipe *pipe = pkt->pipe;
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struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
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struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
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enum dma_data_direction dir;
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int ret = 0;
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dir = usbhs_pipe_is_dir_host(pipe);
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if (map) {
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/* it can not use scatter/gather */
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WARN_ON(req->num_sgs);
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ret = usb_gadget_map_request(&gpriv->gadget, req, dir);
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if (ret < 0)
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return ret;
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pkt->dma = req->dma;
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} else {
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usb_gadget_unmap_request(&gpriv->gadget, req, dir);
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}
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return ret;
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}
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/*
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* USB_TYPE_STANDARD / clear feature functions
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*/
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static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
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struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl)
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{
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struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
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struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
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struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
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usbhs_dcp_control_transfer_done(pipe);
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return 0;
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}
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static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
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struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl)
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{
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struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
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struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
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if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
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usbhs_pipe_disable(pipe);
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usbhs_pipe_sequence_data0(pipe);
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usbhs_pipe_enable(pipe);
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}
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usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
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usbhs_pkt_start(pipe);
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return 0;
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}
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static struct usbhsg_recip_handle req_clear_feature = {
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.name = "clear feature",
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.device = usbhsg_recip_handler_std_control_done,
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.interface = usbhsg_recip_handler_std_control_done,
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.endpoint = usbhsg_recip_handler_std_clear_endpoint,
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};
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/*
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* USB_TYPE_STANDARD / set feature functions
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*/
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static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
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struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl)
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{
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switch (le16_to_cpu(ctrl->wValue)) {
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case USB_DEVICE_TEST_MODE:
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usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
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udelay(100);
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usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
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break;
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default:
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usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
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break;
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}
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return 0;
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}
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static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
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struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl)
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{
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struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
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usbhs_pipe_stall(pipe);
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usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
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return 0;
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}
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static struct usbhsg_recip_handle req_set_feature = {
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.name = "set feature",
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.device = usbhsg_recip_handler_std_set_device,
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.interface = usbhsg_recip_handler_std_control_done,
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.endpoint = usbhsg_recip_handler_std_set_endpoint,
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};
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/*
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* USB_TYPE_STANDARD / get status functions
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*/
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static void __usbhsg_recip_send_complete(struct usb_ep *ep,
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struct usb_request *req)
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{
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struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
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/* free allocated recip-buffer/usb_request */
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kfree(ureq->pkt.buf);
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usb_ep_free_request(ep, req);
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}
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static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
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unsigned short status)
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{
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struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
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struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
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struct device *dev = usbhsg_gpriv_to_dev(gpriv);
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struct usb_request *req;
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unsigned short *buf;
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/* alloc new usb_request for recip */
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req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
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if (!req) {
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dev_err(dev, "recip request allocation fail\n");
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return;
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}
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/* alloc recip data buffer */
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buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
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if (!buf) {
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usb_ep_free_request(&dcp->ep, req);
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dev_err(dev, "recip data allocation fail\n");
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return;
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}
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/* recip data is status */
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*buf = cpu_to_le16(status);
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/* allocated usb_request/buffer will be freed */
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req->complete = __usbhsg_recip_send_complete;
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req->buf = buf;
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req->length = sizeof(*buf);
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req->zero = 0;
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/* push packet */
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pipe->handler = &usbhs_fifo_pio_push_handler;
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usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
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}
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static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
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struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl)
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{
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struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
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unsigned short status = 0;
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if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
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status = 1 << USB_DEVICE_SELF_POWERED;
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__usbhsg_recip_send_status(gpriv, status);
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return 0;
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}
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static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
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struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl)
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{
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struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
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unsigned short status = 0;
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__usbhsg_recip_send_status(gpriv, status);
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return 0;
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}
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static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
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struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl)
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{
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struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
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struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
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unsigned short status = 0;
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if (usbhs_pipe_is_stall(pipe))
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status = 1 << USB_ENDPOINT_HALT;
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__usbhsg_recip_send_status(gpriv, status);
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return 0;
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}
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static struct usbhsg_recip_handle req_get_status = {
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.name = "get status",
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.device = usbhsg_recip_handler_std_get_device,
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.interface = usbhsg_recip_handler_std_get_interface,
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.endpoint = usbhsg_recip_handler_std_get_endpoint,
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};
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/*
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* USB_TYPE handler
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*/
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static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
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struct usbhsg_recip_handle *handler,
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struct usb_ctrlrequest *ctrl)
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{
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struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
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struct device *dev = usbhsg_gpriv_to_dev(gpriv);
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struct usbhsg_uep *uep;
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struct usbhs_pipe *pipe;
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int recip = ctrl->bRequestType & USB_RECIP_MASK;
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int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
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int ret = 0;
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int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
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struct usb_ctrlrequest *ctrl);
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char *msg;
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uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
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pipe = usbhsg_uep_to_pipe(uep);
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if (!pipe) {
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dev_err(dev, "wrong recip request\n");
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return -EINVAL;
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}
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switch (recip) {
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case USB_RECIP_DEVICE:
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msg = "DEVICE";
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func = handler->device;
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break;
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case USB_RECIP_INTERFACE:
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msg = "INTERFACE";
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func = handler->interface;
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break;
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case USB_RECIP_ENDPOINT:
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msg = "ENDPOINT";
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func = handler->endpoint;
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break;
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default:
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dev_warn(dev, "unsupported RECIP(%d)\n", recip);
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func = NULL;
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ret = -EINVAL;
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}
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if (func) {
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dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
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ret = func(priv, uep, ctrl);
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}
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return ret;
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}
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/*
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* irq functions
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*
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* it will be called from usbhs_interrupt
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*/
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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), -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;
|
|
|
|
/*
|
|
* 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);
|
|
|
|
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);
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
priv->pfunc.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;
|
|
|
|
renesas_usbhs_call_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) {
|
|
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;
|
|
}
|
|
|
|
gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
|
|
dev_info(dev, "%stransceiver found\n",
|
|
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;
|
|
|
|
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);
|
|
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);
|
|
}
|