diff options
Diffstat (limited to 'drivers/usb/gadget/pxa2xx_udc.c')
| -rw-r--r-- | drivers/usb/gadget/pxa2xx_udc.c | 81 |
1 files changed, 74 insertions, 7 deletions
diff --git a/drivers/usb/gadget/pxa2xx_udc.c b/drivers/usb/gadget/pxa2xx_udc.c index fff027d..1ed506e 100644 --- a/drivers/usb/gadget/pxa2xx_udc.c +++ b/drivers/usb/gadget/pxa2xx_udc.c @@ -43,11 +43,11 @@ #include <linux/mm.h> #include <linux/platform_device.h> #include <linux/dma-mapping.h> +#include <linux/irq.h> #include <asm/byteorder.h> #include <asm/dma.h> #include <asm/io.h> -#include <asm/irq.h> #include <asm/system.h> #include <asm/mach-types.h> #include <asm/unaligned.h> @@ -110,7 +110,7 @@ static int use_dma = 1; module_param(use_dma, bool, 0); MODULE_PARM_DESC (use_dma, "true to use dma"); -static void dma_nodesc_handler (int dmach, void *_ep, struct pt_regs *r); +static void dma_nodesc_handler (int dmach, void *_ep); static void kick_dma(struct pxa2xx_ep *ep, struct pxa2xx_request *req); #ifdef USE_OUT_DMA @@ -150,6 +150,39 @@ MODULE_PARM_DESC (fifo_mode, "pxa2xx udc fifo mode"); static void pxa2xx_ep_fifo_flush (struct usb_ep *ep); static void nuke (struct pxa2xx_ep *, int status); +/* one GPIO should be used to detect VBUS from the host */ +static int is_vbus_present(void) +{ + struct pxa2xx_udc_mach_info *mach = the_controller->mach; + + if (mach->gpio_vbus) + return pxa_gpio_get(mach->gpio_vbus); + if (mach->udc_is_connected) + return mach->udc_is_connected(); + return 1; +} + +/* one GPIO should control a D+ pullup, so host sees this device (or not) */ +static void pullup_off(void) +{ + struct pxa2xx_udc_mach_info *mach = the_controller->mach; + + if (mach->gpio_pullup) + pxa_gpio_set(mach->gpio_pullup, 0); + else if (mach->udc_command) + mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT); +} + +static void pullup_on(void) +{ + struct pxa2xx_udc_mach_info *mach = the_controller->mach; + + if (mach->gpio_pullup) + pxa_gpio_set(mach->gpio_pullup, 1); + else if (mach->udc_command) + mach->udc_command(PXA2XX_UDC_CMD_CONNECT); +} + static void pio_irq_enable(int bEndpointAddress) { bEndpointAddress &= 0xf; @@ -795,7 +828,7 @@ static void cancel_dma(struct pxa2xx_ep *ep) } /* dma channel stopped ... normal tx end (IN), or on error (IN/OUT) */ -static void dma_nodesc_handler(int dmach, void *_ep, struct pt_regs *r) +static void dma_nodesc_handler(int dmach, void *_ep) { struct pxa2xx_ep *ep = _ep; struct pxa2xx_request *req; @@ -1691,7 +1724,7 @@ EXPORT_SYMBOL(usb_gadget_unregister_driver); */ static irqreturn_t -lubbock_vbus_irq(int irq, void *_dev, struct pt_regs *r) +lubbock_vbus_irq(int irq, void *_dev) { struct pxa2xx_udc *dev = _dev; int vbus; @@ -1721,6 +1754,15 @@ lubbock_vbus_irq(int irq, void *_dev, struct pt_regs *r) #endif +static irqreturn_t udc_vbus_irq(int irq, void *_dev) +{ + struct pxa2xx_udc *dev = _dev; + int vbus = pxa_gpio_get(dev->mach->gpio_vbus); + + pxa2xx_udc_vbus_session(&dev->gadget, vbus); + return IRQ_HANDLED; +} + /*-------------------------------------------------------------------------*/ @@ -2041,7 +2083,7 @@ static void handle_ep(struct pxa2xx_ep *ep) * could cause usb protocol errors. */ static irqreturn_t -pxa2xx_udc_irq(int irq, void *_dev, struct pt_regs *r) +pxa2xx_udc_irq(int irq, void *_dev) { struct pxa2xx_udc *dev = _dev; int handled; @@ -2430,6 +2472,7 @@ static struct pxa2xx_udc memory = { #define PXA210_B1 0x00000123 #define PXA210_B0 0x00000122 #define IXP425_A0 0x000001c1 +#define IXP425_B0 0x000001f1 #define IXP465_AD 0x00000200 /* @@ -2438,7 +2481,7 @@ static struct pxa2xx_udc memory = { static int __init pxa2xx_udc_probe(struct platform_device *pdev) { struct pxa2xx_udc *dev = &memory; - int retval, out_dma = 1; + int retval, out_dma = 1, vbus_irq; u32 chiprev; /* insist on Intel/ARM/XScale */ @@ -2467,6 +2510,7 @@ static int __init pxa2xx_udc_probe(struct platform_device *pdev) break; #elif defined(CONFIG_ARCH_IXP4XX) case IXP425_A0: + case IXP425_B0: case IXP465_AD: dev->has_cfr = 1; out_dma = 0; @@ -2502,6 +2546,16 @@ static int __init pxa2xx_udc_probe(struct platform_device *pdev) /* other non-static parts of init */ dev->dev = &pdev->dev; dev->mach = pdev->dev.platform_data; + if (dev->mach->gpio_vbus) { + vbus_irq = IRQ_GPIO(dev->mach->gpio_vbus & GPIO_MD_MASK_NR); + pxa_gpio_mode((dev->mach->gpio_vbus & GPIO_MD_MASK_NR) + | GPIO_IN); + set_irq_type(vbus_irq, IRQT_BOTHEDGE); + } else + vbus_irq = 0; + if (dev->mach->gpio_pullup) + pxa_gpio_mode((dev->mach->gpio_pullup & GPIO_MD_MASK_NR) + | GPIO_OUT | GPIO_DFLT_LOW); init_timer(&dev->timer); dev->timer.function = udc_watchdog; @@ -2557,8 +2611,19 @@ lubbock_fail0: HEX_DISPLAY(dev->stats.irqs); LUB_DISC_BLNK_LED &= 0xff; #endif - } + } else #endif + if (vbus_irq) { + retval = request_irq(vbus_irq, udc_vbus_irq, + SA_INTERRUPT | SA_SAMPLE_RANDOM, + driver_name, dev); + if (retval != 0) { + printk(KERN_ERR "%s: can't get irq %i, err %d\n", + driver_name, vbus_irq, retval); + free_irq(IRQ_USB, dev); + return -EBUSY; + } + } create_proc_files(); return 0; @@ -2587,6 +2652,8 @@ static int __exit pxa2xx_udc_remove(struct platform_device *pdev) free_irq(LUBBOCK_USB_IRQ, dev); } #endif + if (dev->mach->gpio_vbus) + free_irq(IRQ_GPIO(dev->mach->gpio_vbus), dev); platform_set_drvdata(pdev, NULL); the_controller = NULL; return 0; |