Commit 34ebcd28 authored by David Brownell's avatar David Brownell Committed by Greg Kroah-Hartman

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: default avatarMilan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent c51e9749
......@@ -71,7 +71,7 @@
* by the host to interact with this device, and allocates endpoints to
* the different protocol interfaces. The controller driver virtualizes
* usb hardware so that the gadget drivers will be more portable.
*
*
* This UDC hardware wants to implement a bit too much USB protocol, so
* it constrains the sorts of USB configuration change events that work.
* The errata for these chips are misleading; some "fixed" bugs from
......@@ -141,7 +141,7 @@ MODULE_PARM_DESC (fifo_mode, "pxa2xx udc fifo mode");
#endif
/* ---------------------------------------------------------------------------
* endpoint related parts of the api to the usb controller hardware,
* endpoint related parts of the api to the usb controller hardware,
* used by gadget driver; and the inner talker-to-hardware core.
* ---------------------------------------------------------------------------
*/
......@@ -293,7 +293,7 @@ static int pxa2xx_ep_enable (struct usb_ep *_ep,
#ifdef USE_DMA
/* for (some) bulk and ISO endpoints, try to get a DMA channel and
* bind it to the endpoint. otherwise use PIO.
* bind it to the endpoint. otherwise use PIO.
*/
switch (ep->bmAttributes) {
case USB_ENDPOINT_XFER_ISOC:
......@@ -304,7 +304,7 @@ static int pxa2xx_ep_enable (struct usb_ep *_ep,
if (!use_dma || !ep->reg_drcmr)
break;
ep->dma = pxa_request_dma ((char *)_ep->name,
(le16_to_cpu (desc->wMaxPacketSize) > 64)
(le16_to_cpu (desc->wMaxPacketSize) > 64)
? DMA_PRIO_MEDIUM /* some iso */
: DMA_PRIO_LOW,
dma_nodesc_handler, ep);
......@@ -361,7 +361,7 @@ static int pxa2xx_ep_disable (struct usb_ep *_ep)
*/
/*
* pxa2xx_ep_alloc_request - allocate a request data structure
* pxa2xx_ep_alloc_request - allocate a request data structure
*/
static struct usb_request *
pxa2xx_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags)
......@@ -378,7 +378,7 @@ pxa2xx_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags)
/*
* pxa2xx_ep_free_request - deallocate a request data structure
* pxa2xx_ep_free_request - deallocate a request data structure
*/
static void
pxa2xx_ep_free_request (struct usb_ep *_ep, struct usb_request *_req)
......@@ -1031,7 +1031,7 @@ pxa2xx_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
/*
* nuke - dequeue ALL requests
* nuke - dequeue ALL requests
*/
static void nuke(struct pxa2xx_ep *ep, int status)
{
......@@ -1136,16 +1136,16 @@ static int pxa2xx_ep_set_halt(struct usb_ep *_ep, int value)
ep->dev->req_pending = 0;
ep->dev->ep0state = EP0_STALL;
/* and bulk/intr endpoints like dropping stalls too */
} else {
unsigned i;
for (i = 0; i < 1000; i += 20) {
if (*ep->reg_udccs & UDCCS_BI_SST)
break;
udelay(20);
}
}
local_irq_restore(flags);
/* and bulk/intr endpoints like dropping stalls too */
} else {
unsigned i;
for (i = 0; i < 1000; i += 20) {
if (*ep->reg_udccs & UDCCS_BI_SST)
break;
udelay(20);
}
}
local_irq_restore(flags);
DBG(DBG_VERBOSE, "%s halt\n", _ep->name);
return 0;
......@@ -1216,7 +1216,7 @@ static struct usb_ep_ops pxa2xx_ep_ops = {
/* ---------------------------------------------------------------------------
* device-scoped parts of the api to the usb controller hardware
* device-scoped parts of the api to the usb controller hardware
* ---------------------------------------------------------------------------
*/
......@@ -1239,7 +1239,7 @@ static void udc_enable (struct pxa2xx_udc *);
static void udc_disable(struct pxa2xx_udc *);
/* We disable the UDC -- and its 48 MHz clock -- whenever it's not
* in active use.
* in active use.
*/
static int pullup(struct pxa2xx_udc *udc, int is_active)
{
......@@ -1464,24 +1464,10 @@ udc_proc_read(char *page, char **start, off_t off, int count,
#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
/* "function" sysfs attribute */
static ssize_t
show_function (struct device *_dev, struct device_attribute *attr, char *buf)
{
struct pxa2xx_udc *dev = dev_get_drvdata (_dev);
if (!dev->driver
|| !dev->driver->function
|| strlen (dev->driver->function) > PAGE_SIZE)
return 0;
return scnprintf (buf, PAGE_SIZE, "%s\n", dev->driver->function);
}
static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
/*-------------------------------------------------------------------------*/
/*
* udc_disable - disable USB device controller
* udc_disable - disable USB device controller
*/
static void udc_disable(struct pxa2xx_udc *dev)
{
......@@ -1507,7 +1493,7 @@ static void udc_disable(struct pxa2xx_udc *dev)
/*
* udc_reinit - initialize software state
* udc_reinit - initialize software state
*/
static void udc_reinit(struct pxa2xx_udc *dev)
{
......@@ -1635,18 +1621,20 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
dev->gadget.dev.driver = &driver->driver;
dev->pullup = 1;
device_add (&dev->gadget.dev);
retval = device_add (&dev->gadget.dev);
if (retval) {
fail:
dev->driver = NULL;
dev->gadget.dev.driver = NULL;
return retval;
}
retval = driver->bind(&dev->gadget);
if (retval) {
DMSG("bind to driver %s --> error %d\n",
driver->driver.name, retval);
device_del (&dev->gadget.dev);
dev->driver = NULL;
dev->gadget.dev.driver = NULL;
return retval;
goto fail;
}
device_create_file(dev->dev, &dev_attr_function);
/* ... then enable host detection and ep0; and we're ready
* for set_configuration as well as eventual disconnect.
......@@ -1704,7 +1692,6 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
dev->driver = NULL;
device_del (&dev->gadget.dev);
device_remove_file(dev->dev, &dev_attr_function);
DMSG("unregistered gadget driver '%s'\n", driver->driver.name);
dump_state(dev);
......@@ -2474,12 +2461,12 @@ static struct pxa2xx_udc memory = {
#define IXP465_AD 0x00000200
/*
* probe - binds to the platform device
* probe - binds to the platform device
*/
static int __init pxa2xx_udc_probe(struct platform_device *pdev)
{
struct pxa2xx_udc *dev = &memory;
int retval, out_dma = 1, vbus_irq;
int retval, out_dma = 1, vbus_irq, irq;
u32 chiprev;
/* insist on Intel/ARM/XScale */
......@@ -2522,7 +2509,11 @@ static int __init pxa2xx_udc_probe(struct platform_device *pdev)
return -ENODEV;
}
pr_debug("%s: IRQ %d%s%s%s\n", driver_name, IRQ_USB,
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return -ENODEV;
pr_debug("%s: IRQ %d%s%s%s\n", driver_name, irq,
dev->has_cfr ? "" : " (!cfr)",
out_dma ? "" : " (broken dma-out)",
SIZE_STR DMASTR
......@@ -2570,11 +2561,11 @@ static int __init pxa2xx_udc_probe(struct platform_device *pdev)
dev->vbus = is_vbus_present();
/* irq setup after old hardware state is cleaned up */
retval = request_irq(IRQ_USB, pxa2xx_udc_irq,
retval = request_irq(irq, pxa2xx_udc_irq,
IRQF_DISABLED, driver_name, dev);
if (retval != 0) {
printk(KERN_ERR "%s: can't get irq %i, err %d\n",
driver_name, IRQ_USB, retval);
printk(KERN_ERR "%s: can't get irq %d, err %d\n",
driver_name, irq, retval);
return -EBUSY;
}
dev->got_irq = 1;
......@@ -2589,7 +2580,7 @@ static int __init pxa2xx_udc_probe(struct platform_device *pdev)
printk(KERN_ERR "%s: can't get irq %i, err %d\n",
driver_name, LUBBOCK_USB_DISC_IRQ, retval);
lubbock_fail0:
free_irq(IRQ_USB, dev);
free_irq(irq, dev);
return -EBUSY;
}
retval = request_irq(LUBBOCK_USB_IRQ,
......@@ -2641,7 +2632,7 @@ static int __exit pxa2xx_udc_remove(struct platform_device *pdev)
remove_proc_files();
if (dev->got_irq) {
free_irq(IRQ_USB, dev);
free_irq(platform_get_irq(pdev, 0), dev);
dev->got_irq = 0;
}
#ifdef CONFIG_ARCH_LUBBOCK
......@@ -2668,7 +2659,7 @@ static int __exit pxa2xx_udc_remove(struct platform_device *pdev)
*
* For now, we punt and forcibly disconnect from the USB host when PXA
* enters any suspend state. While we're disconnected, we always disable
* the 48MHz USB clock ... allowing PXA sleep and/or 33 MHz idle states.
* the 48MHz USB clock ... allowing PXA sleep and/or 33 MHz idle states.
* Boards without software pullup control shouldn't use those states.
* VBUS IRQs should probably be ignored so that the PXA device just acts
* "dead" to USB hosts until system resume.
......@@ -2701,7 +2692,6 @@ static int pxa2xx_udc_resume(struct platform_device *dev)
/*-------------------------------------------------------------------------*/
static struct platform_driver udc_driver = {
.probe = pxa2xx_udc_probe,
.shutdown = pxa2xx_udc_shutdown,
.remove = __exit_p(pxa2xx_udc_remove),
.suspend = pxa2xx_udc_suspend,
......@@ -2715,7 +2705,7 @@ static struct platform_driver udc_driver = {
static int __init udc_init(void)
{
printk(KERN_INFO "%s: version %s\n", driver_name, DRIVER_VERSION);
return platform_driver_register(&udc_driver);
return platform_driver_probe(&udc_driver, pxa2xx_udc_probe);
}
module_init(udc_init);
......
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