pxa2xx_udc: cleanups, use platform_get_irq
Make the pxa2xx_udc driver fetch its IRQ from platform resources rather than using compile-time constants, so that it works properly on IXP4xx systems not just PXA21x/25x/26x. Other updates: - Do that using platform_get_irq() - Switch to platform_driver_probe() - Handle device_add() errors - Remove "function" sysfs attribute and its potential errors - Whitespace cleanups Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>hifive-unleashed-5.1
David Brownell
Greg Kroah-Hartman
parent
c51e9749ab
commit
34ebcd2823
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@ -71,7 +71,7 @@
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* by the host to interact with this device, and allocates endpoints to
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* the different protocol interfaces. The controller driver virtualizes
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* usb hardware so that the gadget drivers will be more portable.
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*
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*
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* This UDC hardware wants to implement a bit too much USB protocol, so
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* it constrains the sorts of USB configuration change events that work.
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* The errata for these chips are misleading; some "fixed" bugs from
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@ -141,7 +141,7 @@ MODULE_PARM_DESC (fifo_mode, "pxa2xx udc fifo mode");
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#endif
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/* ---------------------------------------------------------------------------
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* endpoint related parts of the api to the usb controller hardware,
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* endpoint related parts of the api to the usb controller hardware,
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* used by gadget driver; and the inner talker-to-hardware core.
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* ---------------------------------------------------------------------------
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*/
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@ -293,7 +293,7 @@ static int pxa2xx_ep_enable (struct usb_ep *_ep,
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#ifdef USE_DMA
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/* for (some) bulk and ISO endpoints, try to get a DMA channel and
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* bind it to the endpoint. otherwise use PIO.
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* bind it to the endpoint. otherwise use PIO.
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*/
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switch (ep->bmAttributes) {
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case USB_ENDPOINT_XFER_ISOC:
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@ -304,7 +304,7 @@ static int pxa2xx_ep_enable (struct usb_ep *_ep,
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if (!use_dma || !ep->reg_drcmr)
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break;
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ep->dma = pxa_request_dma ((char *)_ep->name,
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(le16_to_cpu (desc->wMaxPacketSize) > 64)
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(le16_to_cpu (desc->wMaxPacketSize) > 64)
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? DMA_PRIO_MEDIUM /* some iso */
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: DMA_PRIO_LOW,
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dma_nodesc_handler, ep);
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@ -361,7 +361,7 @@ static int pxa2xx_ep_disable (struct usb_ep *_ep)
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*/
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/*
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* pxa2xx_ep_alloc_request - allocate a request data structure
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* pxa2xx_ep_alloc_request - allocate a request data structure
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*/
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static struct usb_request *
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pxa2xx_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags)
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@ -378,7 +378,7 @@ pxa2xx_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags)
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/*
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* pxa2xx_ep_free_request - deallocate a request data structure
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* pxa2xx_ep_free_request - deallocate a request data structure
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*/
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static void
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pxa2xx_ep_free_request (struct usb_ep *_ep, struct usb_request *_req)
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@ -1031,7 +1031,7 @@ pxa2xx_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
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/*
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* nuke - dequeue ALL requests
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* nuke - dequeue ALL requests
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*/
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static void nuke(struct pxa2xx_ep *ep, int status)
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{
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@ -1136,16 +1136,16 @@ static int pxa2xx_ep_set_halt(struct usb_ep *_ep, int value)
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ep->dev->req_pending = 0;
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ep->dev->ep0state = EP0_STALL;
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/* and bulk/intr endpoints like dropping stalls too */
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} else {
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unsigned i;
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for (i = 0; i < 1000; i += 20) {
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if (*ep->reg_udccs & UDCCS_BI_SST)
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break;
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udelay(20);
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}
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}
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local_irq_restore(flags);
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/* and bulk/intr endpoints like dropping stalls too */
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} else {
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unsigned i;
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for (i = 0; i < 1000; i += 20) {
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if (*ep->reg_udccs & UDCCS_BI_SST)
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break;
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udelay(20);
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}
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}
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local_irq_restore(flags);
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DBG(DBG_VERBOSE, "%s halt\n", _ep->name);
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return 0;
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@ -1216,7 +1216,7 @@ static struct usb_ep_ops pxa2xx_ep_ops = {
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/* ---------------------------------------------------------------------------
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* device-scoped parts of the api to the usb controller hardware
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* device-scoped parts of the api to the usb controller hardware
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* ---------------------------------------------------------------------------
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*/
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@ -1239,7 +1239,7 @@ static void udc_enable (struct pxa2xx_udc *);
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static void udc_disable(struct pxa2xx_udc *);
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/* We disable the UDC -- and its 48 MHz clock -- whenever it's not
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* in active use.
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* in active use.
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*/
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static int pullup(struct pxa2xx_udc *udc, int is_active)
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{
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@ -1464,24 +1464,10 @@ done:
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#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
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/* "function" sysfs attribute */
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static ssize_t
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show_function (struct device *_dev, struct device_attribute *attr, char *buf)
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{
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struct pxa2xx_udc *dev = dev_get_drvdata (_dev);
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if (!dev->driver
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|| !dev->driver->function
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|| strlen (dev->driver->function) > PAGE_SIZE)
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return 0;
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return scnprintf (buf, PAGE_SIZE, "%s\n", dev->driver->function);
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}
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static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
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/*-------------------------------------------------------------------------*/
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/*
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* udc_disable - disable USB device controller
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* udc_disable - disable USB device controller
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*/
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static void udc_disable(struct pxa2xx_udc *dev)
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{
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@ -1507,7 +1493,7 @@ static void udc_disable(struct pxa2xx_udc *dev)
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/*
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* udc_reinit - initialize software state
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* udc_reinit - initialize software state
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*/
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static void udc_reinit(struct pxa2xx_udc *dev)
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{
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@ -1635,18 +1621,20 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
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dev->gadget.dev.driver = &driver->driver;
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dev->pullup = 1;
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device_add (&dev->gadget.dev);
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retval = device_add (&dev->gadget.dev);
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if (retval) {
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fail:
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dev->driver = NULL;
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dev->gadget.dev.driver = NULL;
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return retval;
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}
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retval = driver->bind(&dev->gadget);
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if (retval) {
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DMSG("bind to driver %s --> error %d\n",
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driver->driver.name, retval);
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device_del (&dev->gadget.dev);
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dev->driver = NULL;
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dev->gadget.dev.driver = NULL;
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return retval;
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goto fail;
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}
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device_create_file(dev->dev, &dev_attr_function);
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/* ... then enable host detection and ep0; and we're ready
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* for set_configuration as well as eventual disconnect.
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@ -1704,7 +1692,6 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
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dev->driver = NULL;
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device_del (&dev->gadget.dev);
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device_remove_file(dev->dev, &dev_attr_function);
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DMSG("unregistered gadget driver '%s'\n", driver->driver.name);
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dump_state(dev);
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@ -2474,12 +2461,12 @@ static struct pxa2xx_udc memory = {
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#define IXP465_AD 0x00000200
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/*
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* probe - binds to the platform device
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* probe - binds to the platform device
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*/
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static int __init pxa2xx_udc_probe(struct platform_device *pdev)
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{
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struct pxa2xx_udc *dev = &memory;
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int retval, out_dma = 1, vbus_irq;
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int retval, out_dma = 1, vbus_irq, irq;
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u32 chiprev;
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/* insist on Intel/ARM/XScale */
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@ -2522,7 +2509,11 @@ static int __init pxa2xx_udc_probe(struct platform_device *pdev)
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return -ENODEV;
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}
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pr_debug("%s: IRQ %d%s%s%s\n", driver_name, IRQ_USB,
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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return -ENODEV;
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pr_debug("%s: IRQ %d%s%s%s\n", driver_name, irq,
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dev->has_cfr ? "" : " (!cfr)",
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out_dma ? "" : " (broken dma-out)",
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SIZE_STR DMASTR
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@ -2570,11 +2561,11 @@ static int __init pxa2xx_udc_probe(struct platform_device *pdev)
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dev->vbus = is_vbus_present();
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/* irq setup after old hardware state is cleaned up */
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retval = request_irq(IRQ_USB, pxa2xx_udc_irq,
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retval = request_irq(irq, pxa2xx_udc_irq,
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IRQF_DISABLED, driver_name, dev);
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if (retval != 0) {
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printk(KERN_ERR "%s: can't get irq %i, err %d\n",
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driver_name, IRQ_USB, retval);
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printk(KERN_ERR "%s: can't get irq %d, err %d\n",
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driver_name, irq, retval);
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return -EBUSY;
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}
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dev->got_irq = 1;
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@ -2589,7 +2580,7 @@ static int __init pxa2xx_udc_probe(struct platform_device *pdev)
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printk(KERN_ERR "%s: can't get irq %i, err %d\n",
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driver_name, LUBBOCK_USB_DISC_IRQ, retval);
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lubbock_fail0:
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free_irq(IRQ_USB, dev);
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free_irq(irq, dev);
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return -EBUSY;
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}
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retval = request_irq(LUBBOCK_USB_IRQ,
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@ -2641,7 +2632,7 @@ static int __exit pxa2xx_udc_remove(struct platform_device *pdev)
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remove_proc_files();
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if (dev->got_irq) {
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free_irq(IRQ_USB, dev);
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free_irq(platform_get_irq(pdev, 0), dev);
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dev->got_irq = 0;
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}
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#ifdef CONFIG_ARCH_LUBBOCK
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@ -2668,7 +2659,7 @@ static int __exit pxa2xx_udc_remove(struct platform_device *pdev)
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*
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* For now, we punt and forcibly disconnect from the USB host when PXA
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* enters any suspend state. While we're disconnected, we always disable
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* the 48MHz USB clock ... allowing PXA sleep and/or 33 MHz idle states.
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* the 48MHz USB clock ... allowing PXA sleep and/or 33 MHz idle states.
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* Boards without software pullup control shouldn't use those states.
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* VBUS IRQs should probably be ignored so that the PXA device just acts
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* "dead" to USB hosts until system resume.
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@ -2701,7 +2692,6 @@ static int pxa2xx_udc_resume(struct platform_device *dev)
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/*-------------------------------------------------------------------------*/
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static struct platform_driver udc_driver = {
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.probe = pxa2xx_udc_probe,
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.shutdown = pxa2xx_udc_shutdown,
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.remove = __exit_p(pxa2xx_udc_remove),
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.suspend = pxa2xx_udc_suspend,
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@ -2715,7 +2705,7 @@ static struct platform_driver udc_driver = {
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static int __init udc_init(void)
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{
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printk(KERN_INFO "%s: version %s\n", driver_name, DRIVER_VERSION);
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return platform_driver_register(&udc_driver);
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return platform_driver_probe(&udc_driver, pxa2xx_udc_probe);
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}
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module_init(udc_init);
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