From 7f67c38bdcb6d8bce02e10521fbf1618b586319f Mon Sep 17 00:00:00 2001 From: Michael Grzeschik Date: Wed, 12 Sep 2012 14:58:00 +0300 Subject: usb: chipidea: udc: fix setup of endpoint maxpacket size This patch changes the setup of the endpoint maxpacket size. All non control endpoints are initialized with an undefined ((unsigned short)~0) maxpacket size. The maxpacket size of Endpoint 0 will be kept at CTRL_PAYLOAD_MAX. Some gadget drivers check for the maxpacket size before they enable the endpoint, which leads to a wrong state in these drivers. Cc: stable Signed-off-by: Michael Grzeschik Acked-by: Felipe Balbi Signed-off-by: Marc Kleine-Budde Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index c7a032a..7801a3f 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -1455,7 +1455,12 @@ static int init_eps(struct ci13xxx *ci) mEp->ep.name = mEp->name; mEp->ep.ops = &usb_ep_ops; - mEp->ep.maxpacket = CTRL_PAYLOAD_MAX; + /* + * for ep0: maxP defined in desc, for other + * eps, maxP is set by epautoconfig() called + * by gadget layer + */ + mEp->ep.maxpacket = (unsigned short)~0; INIT_LIST_HEAD(&mEp->qh.queue); mEp->qh.ptr = dma_pool_alloc(ci->qh_pool, GFP_KERNEL, @@ -1475,6 +1480,7 @@ static int init_eps(struct ci13xxx *ci) else ci->ep0in = mEp; + mEp->ep.maxpacket = CTRL_PAYLOAD_MAX; continue; } -- cgit v0.10.2 From c0a48e6c75f2ac190d812bea5fc339696e434c2e Mon Sep 17 00:00:00 2001 From: Michael Grzeschik Date: Wed, 12 Sep 2012 14:58:01 +0300 Subject: usb: chipidea: udc: add pullup fuction, needed by the uvc gadget Add function to physicaly enable or disable of pullup connection on the USB-D+ line. The uvc gaget will fail, if this function is not implemented. Cc: stable Signed-off-by: Michael Grzeschik Acked-by: Felipe Balbi Signed-off-by: Marc Kleine-Budde Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index 7801a3f..32ee870 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -78,8 +78,7 @@ static inline int ep_to_bit(struct ci13xxx *ci, int n) } /** - * hw_device_state: enables/disables interrupts & starts/stops device (execute - * without interruption) + * hw_device_state: enables/disables interrupts (execute without interruption) * @dma: 0 => disable, !0 => enable and set dma engine * * This function returns an error code @@ -91,9 +90,7 @@ static int hw_device_state(struct ci13xxx *ci, u32 dma) /* interrupt, error, port change, reset, sleep/suspend */ hw_write(ci, OP_USBINTR, ~0, USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI); - hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS); } else { - hw_write(ci, OP_USBCMD, USBCMD_RS, 0); hw_write(ci, OP_USBINTR, ~0, 0); } return 0; @@ -1420,6 +1417,21 @@ static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA) return -ENOTSUPP; } +/* Change Data+ pullup status + * this func is used by usb_gadget_connect/disconnet + */ +static int ci13xxx_pullup(struct usb_gadget *_gadget, int is_on) +{ + struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); + + if (is_on) + hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS); + else + hw_write(ci, OP_USBCMD, USBCMD_RS, 0); + + return 0; +} + static int ci13xxx_start(struct usb_gadget *gadget, struct usb_gadget_driver *driver); static int ci13xxx_stop(struct usb_gadget *gadget, @@ -1432,6 +1444,7 @@ static int ci13xxx_stop(struct usb_gadget *gadget, static const struct usb_gadget_ops usb_gadget_ops = { .vbus_session = ci13xxx_vbus_session, .wakeup = ci13xxx_wakeup, + .pullup = ci13xxx_pullup, .vbus_draw = ci13xxx_vbus_draw, .udc_start = ci13xxx_start, .udc_stop = ci13xxx_stop, -- cgit v0.10.2 From c9d1f947a85e38b6dded469470c95ed62430cb3f Mon Sep 17 00:00:00 2001 From: Marc Kleine-Budde Date: Wed, 12 Sep 2012 14:58:02 +0300 Subject: usb: chipidea: udc: fix error path in udc_start() This patch fixes the error path of udc_start(). Now NULL is used to unset the peripheral with otg_set_peripheral(). Cc: stable Reviewed-by: Richard Zhao Signed-off-by: Marc Kleine-Budde Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index 32ee870..3a755e5 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -1748,7 +1748,7 @@ static int udc_start(struct ci13xxx *ci) remove_trans: if (!IS_ERR_OR_NULL(ci->transceiver)) { - otg_set_peripheral(ci->transceiver->otg, &ci->gadget); + otg_set_peripheral(ci->transceiver->otg, NULL); if (ci->global_phy) usb_put_phy(ci->transceiver); } -- cgit v0.10.2 From ad6b1b97fe8504957d017cd6e4168cac8903d3f3 Mon Sep 17 00:00:00 2001 From: Marc Kleine-Budde Date: Wed, 12 Sep 2012 14:58:03 +0300 Subject: usb: chipidea: cleanup dma_pool if udc_start() fails If udc_start() fails the qh_pool dma-pool cannot be closed because it's still in use. This patch factors out the dma_pool_free() loop into destroy_eps() and calls it in the error path of udc_start(), too. Cc: stable Reviewed-by: Richard Zhao Signed-off-by: Marc Kleine-Budde Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index 3a755e5..2d8b609 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -1503,6 +1503,17 @@ static int init_eps(struct ci13xxx *ci) return retval; } +static void destroy_eps(struct ci13xxx *ci) +{ + int i; + + for (i = 0; i < ci->hw_ep_max; i++) { + struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i]; + + dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma); + } +} + /** * ci13xxx_start: register a gadget driver * @gadget: our gadget @@ -1710,7 +1721,7 @@ static int udc_start(struct ci13xxx *ci) if (ci->platdata->flags & CI13XXX_REQUIRE_TRANSCEIVER) { if (ci->transceiver == NULL) { retval = -ENODEV; - goto free_pools; + goto destroy_eps; } } @@ -1761,6 +1772,8 @@ unreg_device: put_transceiver: if (!IS_ERR_OR_NULL(ci->transceiver) && ci->global_phy) usb_put_phy(ci->transceiver); +destroy_eps: + destroy_eps(ci); free_pools: dma_pool_destroy(ci->td_pool); free_qh_pool: @@ -1775,18 +1788,12 @@ free_qh_pool: */ static void udc_stop(struct ci13xxx *ci) { - int i; - if (ci == NULL) return; usb_del_gadget_udc(&ci->gadget); - for (i = 0; i < ci->hw_ep_max; i++) { - struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i]; - - dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma); - } + destroy_eps(ci); dma_pool_destroy(ci->td_pool); dma_pool_destroy(ci->qh_pool); -- cgit v0.10.2 From db89960e50f45274c07dc60926b5a49489b8a7a0 Mon Sep 17 00:00:00 2001 From: Michael Grzeschik Date: Wed, 12 Sep 2012 14:58:04 +0300 Subject: usb: chipidea: udc: don't stall endpoint if request list is empty in isr_tr_complete_low When attaching an imx28 or imx53 in USB gadget mode to a Windows host and starting a rndis connection we see this message every 4-10 seconds: g_ether gadget: high speed config #2: RNDIS Analysis shows that each time this message is printed, the rndis connection is re-establish due to a reset because of a stalled endpoint (ep 0, dir 1). The endpoint is stalled because the reqeust complete bit on that endpoint is set, but in isr_tr_complete_low() the endpoint request list (mEp->qh.queue) is empty. This patch removed this check, because the code doesn't take the following situation into account: The loop over all endpoints in isr_tr_complete_handler() will call ep_nuke() on both ep0/dir0 and ep/dir1 in the first loop. Pending reqeusts will be flushed and completed here. There seems to be a race condition, the request is nuked, but the request complete bit will be set, too. The subsequent check (in ep0/dir1's loop cycle) for endpoint request list (mEp->qh.queue) empty will fail. Both other mainline chipidea drivers (mv_udc_core.c and fsl_udc_core.c) don't have this check. Cc: stable Signed-off-by: Michael Grzeschik Signed-off-by: Marc Kleine-Budde Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index 2d8b609..d214448 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -771,10 +771,7 @@ __acquires(mEp->lock) { struct ci13xxx_req *mReq, *mReqTemp; struct ci13xxx_ep *mEpTemp = mEp; - int uninitialized_var(retval); - - if (list_empty(&mEp->qh.queue)) - return -EINVAL; + int retval = 0; list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue, queue) { -- cgit v0.10.2