X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fusb%2Fgadget%2Fat91_udc.c;h=274c60a970cdcf8a7f3f0409e0d1512ec653477f;hb=d75379a538708c5a8e3dba673d866c3f5f856620;hp=cd62b029d1766e606945e2c8a12e1ecc08fd119f;hpb=75659ca0c10992dcb39258518368a0f6f56e935d;p=linux-2.6 diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c index cd62b029d1..274c60a970 100644 --- a/drivers/usb/gadget/at91_udc.c +++ b/drivers/usb/gadget/at91_udc.c @@ -21,8 +21,7 @@ * Boston, MA 02111-1307, USA. */ -#undef DEBUG -#undef VERBOSE +#undef VERBOSE_DEBUG #undef PACKET_TRACE #include @@ -46,8 +45,8 @@ #include #include #include +#include -#include #include #include #include @@ -232,6 +231,7 @@ static int proc_udc_open(struct inode *inode, struct file *file) } static const struct file_operations proc_ops = { + .owner = THIS_MODULE, .open = proc_udc_open, .read = seq_read, .llseek = seq_lseek, @@ -240,15 +240,7 @@ static const struct file_operations proc_ops = { static void create_debug_file(struct at91_udc *udc) { - struct proc_dir_entry *pde; - - pde = create_proc_entry (debug_filename, 0, NULL); - udc->pde = pde; - if (pde == NULL) - return; - - pde->proc_fops = &proc_ops; - pde->data = udc; + udc->pde = proc_create_data(debug_filename, 0, NULL, &proc_ops, udc); } static void remove_debug_file(struct at91_udc *udc) @@ -390,6 +382,7 @@ static int write_fifo(struct at91_ep *ep, struct at91_request *req) u32 csr = __raw_readl(creg); u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); unsigned total, count, is_last; + u8 *buf; /* * TODO: allow for writing two packets to the fifo ... that'll @@ -414,6 +407,8 @@ static int write_fifo(struct at91_ep *ep, struct at91_request *req) return 0; } + buf = req->req.buf + req->req.actual; + prefetch(buf); total = req->req.length - req->req.actual; if (ep->ep.maxpacket < total) { count = ep->ep.maxpacket; @@ -436,7 +431,7 @@ static int write_fifo(struct at91_ep *ep, struct at91_request *req) * recover when the actual bytecount matters (e.g. for USB Test * and Measurement Class devices). */ - __raw_writesb(dreg, req->req.buf + req->req.actual, count); + __raw_writesb(dreg, buf, count); csr &= ~SET_FX; csr |= CLR_FX | AT91_UDP_TXPKTRDY; __raw_writel(csr, creg); @@ -458,7 +453,7 @@ static void nuke(struct at91_ep *ep, int status) if (list_empty(&ep->queue)) return; - VDBG("%s %s\n", __FUNCTION__, ep->ep.name); + VDBG("%s %s\n", __func__, ep->ep.name); while (!list_empty(&ep->queue)) { req = list_entry(ep->queue.next, struct at91_request, queue); done(ep, req, status); @@ -580,7 +575,7 @@ static int at91_ep_disable (struct usb_ep * _ep) */ static struct usb_request * -at91_ep_alloc_request(struct usb_ep *_ep, unsigned int gfp_flags) +at91_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) { struct at91_request *req; @@ -793,7 +788,7 @@ static int at91_wakeup(struct usb_gadget *gadget) int status = -EINVAL; unsigned long flags; - DBG("%s\n", __FUNCTION__ ); + DBG("%s\n", __func__ ); local_irq_save(flags); if (!udc->clocked || !udc->suspended) @@ -881,6 +876,8 @@ static void clk_off(struct at91_udc *udc) */ static void pullup(struct at91_udc *udc, int is_on) { + int active = !udc->board.pullup_active_low; + if (!udc->enabled || !udc->vbus) is_on = 0; DBG("%sactive\n", is_on ? "" : "in"); @@ -890,7 +887,7 @@ static void pullup(struct at91_udc *udc, int is_on) at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM); at91_udp_write(udc, AT91_UDP_TXVC, 0); if (cpu_is_at91rm9200()) - at91_set_gpio_value(udc->board.pullup_pin, 1); + gpio_set_value(udc->board.pullup_pin, active); else if (cpu_is_at91sam9260() || cpu_is_at91sam9263()) { u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); @@ -908,7 +905,7 @@ static void pullup(struct at91_udc *udc, int is_on) at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM); at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); if (cpu_is_at91rm9200()) - at91_set_gpio_value(udc->board.pullup_pin, 0); + gpio_set_value(udc->board.pullup_pin, !active); else if (cpu_is_at91sam9260() || cpu_is_at91sam9263()) { u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); @@ -1153,7 +1150,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) | USB_REQ_GET_STATUS: tmp = w_index & USB_ENDPOINT_NUMBER_MASK; ep = &udc->ep[tmp]; - if (tmp > NUM_ENDPOINTS || (tmp && !ep->desc)) + if (tmp >= NUM_ENDPOINTS || (tmp && !ep->desc)) goto stall; if (tmp) { @@ -1176,7 +1173,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) | USB_REQ_SET_FEATURE: tmp = w_index & USB_ENDPOINT_NUMBER_MASK; ep = &udc->ep[tmp]; - if (w_value != USB_ENDPOINT_HALT || tmp > NUM_ENDPOINTS) + if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) goto stall; if (!ep->desc || ep->is_iso) goto stall; @@ -1195,7 +1192,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) | USB_REQ_CLEAR_FEATURE: tmp = w_index & USB_ENDPOINT_NUMBER_MASK; ep = &udc->ep[tmp]; - if (w_value != USB_ENDPOINT_HALT || tmp > NUM_ENDPOINTS) + if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) goto stall; if (tmp == 0) goto succeed; @@ -1551,7 +1548,7 @@ static irqreturn_t at91_vbus_irq(int irq, void *_udc) /* vbus needs at least brief debouncing */ udelay(10); - value = at91_get_gpio_value(udc->board.vbus_pin); + value = gpio_get_value(udc->board.vbus_pin); if (value != udc->vbus) at91_vbus_session(&udc->gadget, value); @@ -1616,6 +1613,8 @@ int usb_gadget_unregister_driver (struct usb_gadget_driver *driver) local_irq_enable(); driver->unbind(&udc->gadget); + udc->gadget.dev.driver = NULL; + udc->gadget.dev.driver_data = NULL; udc->driver = NULL; DBG("unbound from %s\n", driver->driver.name); @@ -1645,12 +1644,12 @@ static int __init at91udc_probe(struct platform_device *pdev) } if (pdev->num_resources != 2) { - DBG("invalid num_resources"); + DBG("invalid num_resources\n"); return -ENODEV; } if ((pdev->resource[0].flags != IORESOURCE_MEM) || (pdev->resource[1].flags != IORESOURCE_IRQ)) { - DBG("invalid resource type"); + DBG("invalid resource type\n"); return -ENODEV; } @@ -1672,10 +1671,26 @@ static int __init at91udc_probe(struct platform_device *pdev) udc->pdev = pdev; udc->enabled = 0; + /* rm9200 needs manual D+ pullup; off by default */ + if (cpu_is_at91rm9200()) { + if (udc->board.pullup_pin <= 0) { + DBG("no D+ pullup?\n"); + retval = -ENODEV; + goto fail0; + } + retval = gpio_request(udc->board.pullup_pin, "udc_pullup"); + if (retval) { + DBG("D+ pullup is busy\n"); + goto fail0; + } + gpio_direction_output(udc->board.pullup_pin, + udc->board.pullup_active_low); + } + udc->udp_baseaddr = ioremap(res->start, res->end - res->start + 1); if (!udc->udp_baseaddr) { - release_mem_region(res->start, res->end - res->start + 1); - return -ENOMEM; + retval = -ENOMEM; + goto fail0a; } udc_reinit(udc); @@ -1686,12 +1701,13 @@ static int __init at91udc_probe(struct platform_device *pdev) if (IS_ERR(udc->iclk) || IS_ERR(udc->fclk)) { DBG("clocks missing\n"); retval = -ENODEV; - goto fail0; + /* NOTE: we "know" here that refcounts on these are NOPs */ + goto fail0b; } retval = device_register(&udc->gadget.dev); if (retval < 0) - goto fail0; + goto fail0b; /* don't do anything until we have both gadget driver and VBUS */ clk_enable(udc->iclk); @@ -1703,25 +1719,32 @@ static int __init at91udc_probe(struct platform_device *pdev) /* request UDC and maybe VBUS irqs */ udc->udp_irq = platform_get_irq(pdev, 0); - if (request_irq(udc->udp_irq, at91_udc_irq, - IRQF_DISABLED, driver_name, udc)) { + retval = request_irq(udc->udp_irq, at91_udc_irq, + IRQF_DISABLED, driver_name, udc); + if (retval < 0) { DBG("request irq %d failed\n", udc->udp_irq); - retval = -EBUSY; goto fail1; } if (udc->board.vbus_pin > 0) { + retval = gpio_request(udc->board.vbus_pin, "udc_vbus"); + if (retval < 0) { + DBG("request vbus pin failed\n"); + goto fail2; + } + gpio_direction_input(udc->board.vbus_pin); + /* * Get the initial state of VBUS - we cannot expect * a pending interrupt. */ - udc->vbus = at91_get_gpio_value(udc->board.vbus_pin); + udc->vbus = gpio_get_value(udc->board.vbus_pin); if (request_irq(udc->board.vbus_pin, at91_vbus_irq, IRQF_DISABLED, driver_name, udc)) { DBG("request vbus irq %d failed\n", udc->board.vbus_pin); free_irq(udc->udp_irq, udc); retval = -EBUSY; - goto fail1; + goto fail3; } } else { DBG("no VBUS detection, assuming always-on\n"); @@ -1734,8 +1757,18 @@ static int __init at91udc_probe(struct platform_device *pdev) INFO("%s version %s\n", driver_name, DRIVER_VERSION); return 0; +fail3: + if (udc->board.vbus_pin > 0) + gpio_free(udc->board.vbus_pin); +fail2: + free_irq(udc->udp_irq, udc); fail1: device_unregister(&udc->gadget.dev); +fail0b: + iounmap(udc->udp_baseaddr); +fail0a: + if (cpu_is_at91rm9200()) + gpio_free(udc->board.pullup_pin); fail0: release_mem_region(res->start, res->end - res->start + 1); DBG("%s probe failed, %d\n", driver_name, retval); @@ -1756,12 +1789,18 @@ static int __exit at91udc_remove(struct platform_device *pdev) device_init_wakeup(&pdev->dev, 0); remove_debug_file(udc); - if (udc->board.vbus_pin > 0) + if (udc->board.vbus_pin > 0) { free_irq(udc->board.vbus_pin, udc); + gpio_free(udc->board.vbus_pin); + } free_irq(udc->udp_irq, udc); device_unregister(&udc->gadget.dev); iounmap(udc->udp_baseaddr); + + if (cpu_is_at91rm9200()) + gpio_free(udc->board.pullup_pin); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); release_mem_region(res->start, res->end - res->start + 1); @@ -1841,3 +1880,4 @@ module_exit(udc_exit_module); MODULE_DESCRIPTION("AT91 udc driver"); MODULE_AUTHOR("Thomas Rathbone, David Brownell"); MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:at91_udc");