From 5ed01c6400270dccb8c3574061ff3d163f0fe3fe Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 24 Jan 2013 15:03:59 +0200 Subject: usb: musb: gadget: let udc-core manage gadget-dev By simply setting a flag, we can delete a little boilerplate code. Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_gadget.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) (limited to 'drivers/usb/musb/musb_gadget.c') diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index be18537c5f14..cadb750921e9 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1887,12 +1887,11 @@ int musb_gadget_setup(struct musb *musb) musb->g.speed = USB_SPEED_UNKNOWN; /* this "gadget" abstracts/virtualizes the controller */ - dev_set_name(&musb->g.dev, "gadget"); musb->g.dev.parent = musb->controller; musb->g.dev.dma_mask = musb->controller->dma_mask; musb->g.dev.release = musb_gadget_release; musb->g.name = musb_driver_name; - + musb->g.register_my_device = true; musb->g.is_otg = 1; musb_g_init_endpoints(musb); @@ -1900,11 +1899,6 @@ int musb_gadget_setup(struct musb *musb) musb->is_active = 0; musb_platform_try_idle(musb, 0); - status = device_register(&musb->g.dev); - if (status != 0) { - put_device(&musb->g.dev); - return status; - } status = usb_add_gadget_udc(musb->controller, &musb->g); if (status) goto err; @@ -1919,8 +1913,6 @@ err: void musb_gadget_cleanup(struct musb *musb) { usb_del_gadget_udc(&musb->g); - if (musb->g.dev.parent) - device_unregister(&musb->g.dev); } /* -- cgit v1.2.3 From 7bce401cc6db5508ef2517e45bd8caf7ce0a15ee Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 24 Jan 2013 17:41:00 +0200 Subject: usb: gadget: drop now unnecessary flag We don't need the ->register_my_device flag anymore because all UDC drivers have been properly converted. Let's remove every history of it. Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_gadget.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/usb/musb/musb_gadget.c') diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index cadb750921e9..e363033f6754 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1891,7 +1891,6 @@ int musb_gadget_setup(struct musb *musb) musb->g.dev.dma_mask = musb->controller->dma_mask; musb->g.dev.release = musb_gadget_release; musb->g.name = musb_driver_name; - musb->g.register_my_device = true; musb->g.is_otg = 1; musb_g_init_endpoints(musb); -- cgit v1.2.3 From 38c5df225692cde4d695e4c74eaa7d83546ebe53 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 4 Feb 2013 19:57:23 +0200 Subject: usb: musb: gadget: delete wrong comment Those comments haven't been updated for a long time, so much that they don't make sense anymore. Best to remove them. Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_gadget.c | 108 ----------------------------------------- 1 file changed, 108 deletions(-) (limited to 'drivers/usb/musb/musb_gadget.c') diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index e363033f6754..b47f66d32b40 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -46,48 +46,6 @@ #include "musb_core.h" -/* MUSB PERIPHERAL status 3-mar-2006: - * - * - EP0 seems solid. It passes both USBCV and usbtest control cases. - * Minor glitches: - * - * + remote wakeup to Linux hosts work, but saw USBCV failures; - * in one test run (operator error?) - * + endpoint halt tests -- in both usbtest and usbcv -- seem - * to break when dma is enabled ... is something wrongly - * clearing SENDSTALL? - * - * - Mass storage behaved ok when last tested. Network traffic patterns - * (with lots of short transfers etc) need retesting; they turn up the - * worst cases of the DMA, since short packets are typical but are not - * required. - * - * - TX/IN - * + both pio and dma behave in with network and g_zero tests - * + no cppi throughput issues other than no-hw-queueing - * + failed with FLAT_REG (DaVinci) - * + seems to behave with double buffering, PIO -and- CPPI - * + with gadgetfs + AIO, requests got lost? - * - * - RX/OUT - * + both pio and dma behave in with network and g_zero tests - * + dma is slow in typical case (short_not_ok is clear) - * + double buffering ok with PIO - * + double buffering *FAILS* with CPPI, wrong data bytes sometimes - * + request lossage observed with gadgetfs - * - * - ISO not tested ... might work, but only weakly isochronous - * - * - Gadget driver disabling of softconnect during bind() is ignored; so - * drivers can't hold off host requests until userspace is ready. - * (Workaround: they can turn it off later.) - * - * - PORTABILITY (assumes PIO works): - * + DaVinci, basically works with cppi dma - * + OMAP 2430, ditto with mentor dma - * + TUSB 6010, platform-specific dma in the works - */ - /* ----------------------------------------------------------------------- */ #define is_buffer_mapped(req) (is_dma_capable() && \ @@ -275,41 +233,6 @@ static inline int max_ep_writesize(struct musb *musb, struct musb_ep *ep) return ep->packet_sz; } - -#ifdef CONFIG_USB_INVENTRA_DMA - -/* Peripheral tx (IN) using Mentor DMA works as follows: - Only mode 0 is used for transfers <= wPktSize, - mode 1 is used for larger transfers, - - One of the following happens: - - Host sends IN token which causes an endpoint interrupt - -> TxAvail - -> if DMA is currently busy, exit. - -> if queue is non-empty, txstate(). - - - Request is queued by the gadget driver. - -> if queue was previously empty, txstate() - - txstate() - -> start - /\ -> setup DMA - | (data is transferred to the FIFO, then sent out when - | IN token(s) are recd from Host. - | -> DMA interrupt on completion - | calls TxAvail. - | -> stop DMA, ~DMAENAB, - | -> set TxPktRdy for last short pkt or zlp - | -> Complete Request - | -> Continue next request (call txstate) - |___________________________________| - - * Non-Mentor DMA engines can of course work differently, such as by - * upleveling from irq-per-packet to irq-per-buffer. - */ - -#endif - /* * An endpoint is transmitting data. This can be called either from * the IRQ routine or from ep.queue() to kickstart a request on an @@ -616,37 +539,6 @@ void musb_g_tx(struct musb *musb, u8 epnum) /* ------------------------------------------------------------ */ -#ifdef CONFIG_USB_INVENTRA_DMA - -/* Peripheral rx (OUT) using Mentor DMA works as follows: - - Only mode 0 is used. - - - Request is queued by the gadget class driver. - -> if queue was previously empty, rxstate() - - - Host sends OUT token which causes an endpoint interrupt - /\ -> RxReady - | -> if request queued, call rxstate - | /\ -> setup DMA - | | -> DMA interrupt on completion - | | -> RxReady - | | -> stop DMA - | | -> ack the read - | | -> if data recd = max expected - | | by the request, or host - | | sent a short packet, - | | complete the request, - | | and start the next one. - | |_____________________________________| - | else just wait for the host - | to send the next OUT token. - |__________________________________________________| - - * Non-Mentor DMA engines can of course work differently. - */ - -#endif - /* * Context: controller locked, IRQs blocked, endpoint selected */ -- cgit v1.2.3 From 37730eccf214ec343b7b0e6cce31400f56ca09ff Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Wed, 6 Feb 2013 10:19:15 +0200 Subject: usb: musb: gadget: fix compile warning MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fix the following compile warning: drivers/usb/musb/musb_gadget.c: In function ‘rxstate’: drivers/usb/musb/musb_gadget.c:714:22: warning: comparison of distinct pointer types lacks a cast [enabled by default] Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_gadget.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) (limited to 'drivers/usb/musb/musb_gadget.c') diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index b47f66d32b40..d35a375c6070 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -627,7 +627,7 @@ static void rxstate(struct musb *musb, struct musb_request *req) struct dma_controller *c; struct dma_channel *channel; int use_dma = 0; - int transfer_size; + unsigned int transfer_size; c = musb->dma_controller; channel = musb_ep->dma; @@ -669,10 +669,11 @@ static void rxstate(struct musb *musb, struct musb_request *req) csr | MUSB_RXCSR_DMAMODE); musb_writew(epio, MUSB_RXCSR, csr); - transfer_size = min(request->length - request->actual, + transfer_size = min_t(unsigned int, + request->length - + request->actual, channel->max_len); musb_ep->dma->desired_mode = 1; - } else { if (!musb_ep->hb_mult && musb_ep->hw_ep->rx_double_buffered) @@ -702,7 +703,7 @@ static void rxstate(struct musb *musb, struct musb_request *req) struct dma_controller *c; struct dma_channel *channel; - int transfer_size = 0; + unsigned int transfer_size = 0; c = musb->dma_controller; channel = musb_ep->dma; @@ -711,11 +712,13 @@ static void rxstate(struct musb *musb, struct musb_request *req) if (fifo_count < musb_ep->packet_sz) transfer_size = fifo_count; else if (request->short_not_ok) - transfer_size = min(request->length - + transfer_size = min_t(unsigned int, + request->length - request->actual, channel->max_len); else - transfer_size = min(request->length - + transfer_size = min_t(unsigned int, + request->length - request->actual, (unsigned)fifo_count); -- cgit v1.2.3 From 5e6e3d3814004a509c9023abfc86ddea6803f8e1 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 26 Feb 2013 11:25:21 +0200 Subject: usb: musb: gadget: remove unnecessary initializations udc-core now sets dma-related and parent fields for us, we don't need to do it ourselves. Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_gadget.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/usb/musb/musb_gadget.c') diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index d35a375c6070..2dd952c330fd 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1782,8 +1782,6 @@ int musb_gadget_setup(struct musb *musb) musb->g.speed = USB_SPEED_UNKNOWN; /* this "gadget" abstracts/virtualizes the controller */ - musb->g.dev.parent = musb->controller; - musb->g.dev.dma_mask = musb->controller->dma_mask; musb->g.dev.release = musb_gadget_release; musb->g.name = musb_driver_name; musb->g.is_otg = 1; -- cgit v1.2.3 From 07d83168278a73647e3a30fc33e274708418c52b Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 26 Feb 2013 15:15:28 +0200 Subject: usb: musb: gadget: don't assign gadget.dev.release directly udc-core provides a better way to handle release methods, let's use it. Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_gadget.c | 8 -------- 1 file changed, 8 deletions(-) (limited to 'drivers/usb/musb/musb_gadget.c') diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index 2dd952c330fd..6101ebf803fd 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1691,13 +1691,6 @@ static const struct usb_gadget_ops musb_gadget_operations = { * all peripheral ports are external... */ -static void musb_gadget_release(struct device *dev) -{ - /* kref_put(WHAT) */ - dev_dbg(dev, "%s\n", __func__); -} - - static void init_peripheral_ep(struct musb *musb, struct musb_ep *ep, u8 epnum, int is_in) { @@ -1782,7 +1775,6 @@ int musb_gadget_setup(struct musb *musb) musb->g.speed = USB_SPEED_UNKNOWN; /* this "gadget" abstracts/virtualizes the controller */ - musb->g.dev.release = musb_gadget_release; musb->g.name = musb_driver_name; musb->g.is_otg = 1; -- cgit v1.2.3 From 42c0bf1ce7c067bbc3e77d5626f102a16bc4fb6b Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 7 Mar 2013 10:39:57 +0200 Subject: usb: otg: prefix otg_state_string with usb_ all other functions under drivers/usb/ start with usb_, let's do the same thing. This patch is in preparation for moving otg_state_string to usb-common.c and deleting otg.c completely. Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_gadget.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/usb/musb/musb_gadget.c') diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index 6101ebf803fd..e8408883ab0d 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1571,7 +1571,7 @@ static int musb_gadget_wakeup(struct usb_gadget *gadget) goto done; default: dev_dbg(musb->controller, "Unhandled wake: %s\n", - otg_state_string(musb->xceiv->state)); + usb_otg_state_string(musb->xceiv->state)); goto done; } @@ -1970,7 +1970,7 @@ void musb_g_resume(struct musb *musb) break; default: WARNING("unhandled RESUME transition (%s)\n", - otg_state_string(musb->xceiv->state)); + usb_otg_state_string(musb->xceiv->state)); } } @@ -2000,7 +2000,7 @@ void musb_g_suspend(struct musb *musb) * A_PERIPHERAL may need care too */ WARNING("unhandled SUSPEND transition (%s)\n", - otg_state_string(musb->xceiv->state)); + usb_otg_state_string(musb->xceiv->state)); } } @@ -2034,7 +2034,7 @@ void musb_g_disconnect(struct musb *musb) switch (musb->xceiv->state) { default: dev_dbg(musb->controller, "Unhandled disconnect %s, setting a_idle\n", - otg_state_string(musb->xceiv->state)); + usb_otg_state_string(musb->xceiv->state)); musb->xceiv->state = OTG_STATE_A_IDLE; MUSB_HST_MODE(musb); break; -- cgit v1.2.3 From e21de10cd8b1338200d96038aa66fb966fcf6ed0 Mon Sep 17 00:00:00 2001 From: Grazvydas Ignotas Date: Sun, 10 Mar 2013 02:49:14 +0200 Subject: usb: musb: gadget: clear gadget_driver when gadget is stopped Some musb glue drivers use gadget_driver pointer to know if any gadget drivers are loaded at some moment and base further decisions on it, like to do runtime suspend/resume or not. Right now the pointer is left alone on stop and OMAP musb glue later does wrong runtime_pm decisions because of it. Clear the gadget_driver pointer on remove, it's invalid after stop anyway. Signed-off-by: Grazvydas Ignotas Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_gadget.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/usb/musb/musb_gadget.c') diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index e8408883ab0d..ff6ba3adf5fe 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1934,6 +1934,7 @@ static int musb_gadget_stop(struct usb_gadget *g, dev_dbg(musb->controller, "unregistering driver %s\n", driver->function); musb->is_active = 0; + musb->gadget_driver = NULL; musb_platform_try_idle(musb, 0); spin_unlock_irqrestore(&musb->lock, flags); -- cgit v1.2.3 From b65ae0f1a7b98c370967cf161ee87011e3ecdd77 Mon Sep 17 00:00:00 2001 From: Grazvydas Ignotas Date: Sun, 24 Mar 2013 17:36:55 +0200 Subject: usb: musb: gadget: use platform callback to enable vbus On some platform configurations (like OMAP3+twl4030) it's the platform code that enables VBUS, not OTG transceiver, so call vbus platform callback instead, it will then call the transceiver if needed. This fixes a use case where USB cable is plugged first and gadget driver is loaded later after that. Signed-off-by: Grazvydas Ignotas Signed-off-by: Felipe Balbi --- drivers/usb/musb/musb_gadget.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'drivers/usb/musb/musb_gadget.c') diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index ff6ba3adf5fe..4be48651b5a8 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1848,9 +1848,8 @@ static int musb_gadget_start(struct usb_gadget *g, goto err; } - if ((musb->xceiv->last_event == USB_EVENT_ID) - && otg->set_vbus) - otg_set_vbus(otg, 1); + if (musb->xceiv->last_event == USB_EVENT_ID) + musb_platform_set_vbus(musb, 1); hcd->self.uses_pio_for_control = 1; -- cgit v1.2.3