diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-05 15:18:00 -0700 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-05 15:18:00 -0700 |
commit | 64dc9e2e7320f079b97c46b106133b58b8e18d40 (patch) | |
tree | ab010dc1337d44e29c2b32b7f11788620a91fe4f /drivers/usb/musb/musb_gadget.c | |
parent | 01a60e76b6392547ad3dca3ac05b9c886fa5da45 (diff) | |
parent | 9b192de60b5a584ee4ed967fb6758773c75e4643 (diff) | |
download | linux-64dc9e2e7320f079b97c46b106133b58b8e18d40.tar.bz2 |
Merge tag 'usb-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
Felipe writes:
usb: patches for v3.10 merge window
Here is the big Gadget & PHY pull request. Many of us have
been really busy lately getting multiple drivers to a better
position.
Since this pull request is so large, I will divide it in sections
so it's easier to grasp what's included.
- cleanups:
. UDC drivers no longer touch gadget->dev, that's now udc-core
responsibility
. Many more UDC drivers converted to usb_gadget_map/unmap_request()
. UDC drivers no longer initialize DMA-related fields from gadget's
device structure
. UDC drivers don't touch gadget.dev.driver directly
. UDC drivers don't assign gadget.dev.release directly
. Removal of some unused DMA_ADDR_INVALID
. Introduction of CONFIG_USB_PHY
. All phy drivers have been moved to drivers/usb/phy and renamed to
a common naming scheme
. Fix PHY layer so it never returns a NULL pointer, also fix all
callers to avoid using IS_ERR_OR_NULL()
. Sparse fixes all over the place
. drivers/usb/otg/ has been deleted
. Marvel drivers (mv_udc, ehci-mv, mv_otg and mv_u3d) improved clock
usage
- new features:
. UDC core now provides a generic way for tracking and reporting
UDC's state (not attached, resuming, suspended, addressed,
default, etc)
. twl4030-usb learned that it shouldn't be enabled during init
. Full DT support for DWC3 has been implemented
. ab8500-usb learned about pinctrl framework
. nop PHY learned about DeviceTree and regulators
. DWC3 learned about suspend/resume
. DWC3 can now be compiled in host-only and gadget-only (as well as
DRD) configurations
. UVC now enables streaming endpoint based on negotiated speed
. isp1301 now implements the PHY API properly
. configfs-based interface for gadget drivers which will lead to
the removal of all code which just combines functions together
to build functional gadget drivers.
. f_serial and f_obex were converted to new configfs interface while
maintaining old interface around.
- non-critical fixes:
. UVC gadget driver got fixes for Endpoint usage and stream calculation
. ab8500-usb fixed unbalanced clock and regulator API usage
. twl4030-usb got a fix for when OMAP3 is booted with cable connected
. fusb300_udc got a fix for DMA usage
. UVC got fixes for two assertions of the USB Video Class Compliance
specification revision 1.1
. build warning issues caused by recent addition of __must_check to
regulator API
These are all changes which deserve a mention, all other changes are related
to these one or minor spelling fixes and other similar tasks.
Signed-of-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb/musb_gadget.c')
-rw-r--r-- | drivers/usb/musb/musb_gadget.c | 156 |
1 files changed, 16 insertions, 140 deletions
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index 83eddedcd9be..ba7092349fa9 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() && \ @@ -280,41 +238,6 @@ 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 @@ -621,37 +544,6 @@ 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 */ @@ -740,7 +632,7 @@ 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; @@ -782,10 +674,11 @@ 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) @@ -815,7 +708,7 @@ 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; @@ -824,11 +717,13 @@ 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); @@ -1681,7 +1576,7 @@ 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; } @@ -1801,13 +1696,6 @@ 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) { @@ -1892,12 +1780,7 @@ 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.is_otg = 1; musb_g_init_endpoints(musb); @@ -1905,11 +1788,6 @@ 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; @@ -1924,8 +1802,6 @@ err: void musb_gadget_cleanup(struct musb *musb) { usb_del_gadget_udc(&musb->g); - if (musb->g.dev.parent) - device_unregister(&musb->g.dev); } /* @@ -1977,9 +1853,8 @@ 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; @@ -2063,6 +1938,7 @@ 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); @@ -2099,7 +1975,7 @@ 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)); } } @@ -2129,7 +2005,7 @@ 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)); } } @@ -2163,7 +2039,7 @@ 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; |