diff options
Diffstat (limited to 'drivers/usb/host/ohci-at91.c')
| -rw-r--r-- | drivers/usb/host/ohci-at91.c | 165 |
1 files changed, 74 insertions, 91 deletions
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index caa3764a3407..418444ebb1b8 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -13,19 +13,24 @@ */ #include <linux/clk.h> -#include <linux/platform_device.h> +#include <linux/dma-mapping.h> #include <linux/of_platform.h> #include <linux/of_gpio.h> +#include <linux/platform_device.h> #include <linux/platform_data/atmel.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> #include <mach/hardware.h> #include <asm/gpio.h> #include <mach/cpu.h> -#ifndef CONFIG_ARCH_AT91 -#error "CONFIG_ARCH_AT91 must be defined." -#endif + +#include "ohci.h" #define valid_port(index) ((index) >= 0 && (index) < AT91_MAX_USBH_PORTS) #define at91_for_each_port(index) \ @@ -33,7 +38,17 @@ /* interface, function and usb clocks; sometimes also an AHB clock */ static struct clk *iclk, *fclk, *uclk, *hclk; +/* interface and function clocks; sometimes also an AHB clock */ + +#define DRIVER_DESC "OHCI Atmel driver" + +static const char hcd_name[] = "ohci-atmel"; + +static struct hc_driver __read_mostly ohci_at91_hc_driver; static int clocked; +static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq, + u16 wValue, u16 wIndex, char *buf, u16 wLength); +static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf); extern int usb_disabled(void); @@ -117,6 +132,8 @@ static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); static int usb_hcd_at91_probe(const struct hc_driver *driver, struct platform_device *pdev) { + struct at91_usbh_data *board; + struct ohci_hcd *ohci; int retval; struct usb_hcd *hcd = NULL; @@ -177,8 +194,10 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver, } } + board = hcd->self.controller->platform_data; + ohci = hcd_to_ohci(hcd); + ohci->num_ports = board->ports; at91_start_hc(pdev); - ohci_hcd_init(hcd_to_ohci(hcd)); retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED); if (retval == 0) @@ -238,36 +257,6 @@ static void usb_hcd_at91_remove(struct usb_hcd *hcd, } /*-------------------------------------------------------------------------*/ - -static int -ohci_at91_reset (struct usb_hcd *hcd) -{ - struct at91_usbh_data *board = dev_get_platdata(hcd->self.controller); - struct ohci_hcd *ohci = hcd_to_ohci (hcd); - int ret; - - if ((ret = ohci_init(ohci)) < 0) - return ret; - - ohci->num_ports = board->ports; - return 0; -} - -static int -ohci_at91_start (struct usb_hcd *hcd) -{ - struct ohci_hcd *ohci = hcd_to_ohci (hcd); - int ret; - - if ((ret = ohci_run(ohci)) < 0) { - dev_err(hcd->self.controller, "can't start %s\n", - hcd->self.bus_name); - ohci_stop(hcd); - return ret; - } - return 0; -} - static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable) { if (!valid_port(port)) @@ -297,8 +286,8 @@ static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port) */ static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf) { - struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller); - int length = ohci_hub_status_data(hcd, buf); + struct at91_usbh_data *pdata = hcd->self.controller->platform_data; + int length = orig_ohci_hub_status_data(hcd, buf); int port; at91_for_each_port(port) { @@ -376,7 +365,8 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, break; } - ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength); + ret = orig_ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, + buf, wLength); if (ret) goto out; @@ -430,51 +420,6 @@ static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, /*-------------------------------------------------------------------------*/ -static const struct hc_driver ohci_at91_hc_driver = { - .description = hcd_name, - .product_desc = "AT91 OHCI", - .hcd_priv_size = sizeof(struct ohci_hcd), - - /* - * generic hardware linkage - */ - .irq = ohci_irq, - .flags = HCD_USB11 | HCD_MEMORY, - - /* - * basic lifecycle operations - */ - .reset = ohci_at91_reset, - .start = ohci_at91_start, - .stop = ohci_stop, - .shutdown = ohci_shutdown, - - /* - * managing i/o requests and associated device resources - */ - .urb_enqueue = ohci_urb_enqueue, - .urb_dequeue = ohci_urb_dequeue, - .endpoint_disable = ohci_endpoint_disable, - - /* - * scheduling support - */ - .get_frame_number = ohci_get_frame, - - /* - * root hub support - */ - .hub_status_data = ohci_at91_hub_status_data, - .hub_control = ohci_at91_hub_control, -#ifdef CONFIG_PM - .bus_suspend = ohci_bus_suspend, - .bus_resume = ohci_bus_resume, -#endif - .start_port_reset = ohci_start_port_reset, -}; - -/*-------------------------------------------------------------------------*/ - static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data) { struct platform_device *pdev = data; @@ -524,7 +469,7 @@ MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids); static int ohci_at91_of_init(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; - int i, gpio; + int i, gpio, ret; enum of_gpio_flags flags; struct at91_usbh_data *pdata; u32 ports; @@ -536,10 +481,9 @@ static int ohci_at91_of_init(struct platform_device *pdev) * Since shared usb code relies on it, set it here for now. * Once we have dma capability bindings this can go away. */ - if (!pdev->dev.dma_mask) - pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; - if (!pdev->dev.coherent_dma_mask) - pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); + ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (ret) + return ret; pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) @@ -703,7 +647,11 @@ ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg) * REVISIT: some boards will be able to turn VBUS off... */ if (at91_suspend_entering_slow_clock()) { - ohci_usb_reset (ohci); + ohci->hc_control = ohci_readl(ohci, &ohci->regs->control); + ohci->hc_control &= OHCI_CTRL_RWC; + ohci_writel(ohci, ohci->hc_control, &ohci->regs->control); + ohci->rh_state = OHCI_RH_HALTED; + /* flush the writes */ (void) ohci_readl (ohci, &ohci->regs->control); at91_stop_clock(); @@ -730,8 +678,6 @@ static int ohci_hcd_at91_drv_resume(struct platform_device *pdev) #define ohci_hcd_at91_drv_resume NULL #endif -MODULE_ALIAS("platform:at91_ohci"); - static struct platform_driver ohci_hcd_at91_driver = { .probe = ohci_hcd_at91_drv_probe, .remove = ohci_hcd_at91_drv_remove, @@ -744,3 +690,40 @@ static struct platform_driver ohci_hcd_at91_driver = { .of_match_table = of_match_ptr(at91_ohci_dt_ids), }, }; + +static int __init ohci_at91_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + ohci_init_driver(&ohci_at91_hc_driver, NULL); + + /* + * The Atmel HW has some unusual quirks, which require Atmel-specific + * workarounds. We override certain hc_driver functions here to + * achieve that. We explicitly do not enhance ohci_driver_overrides to + * allow this more easily, since this is an unusual case, and we don't + * want to encourage others to override these functions by making it + * too easy. + */ + + orig_ohci_hub_control = ohci_at91_hc_driver.hub_control; + orig_ohci_hub_status_data = ohci_at91_hc_driver.hub_status_data; + + ohci_at91_hc_driver.hub_status_data = ohci_at91_hub_status_data; + ohci_at91_hc_driver.hub_control = ohci_at91_hub_control; + + return platform_driver_register(&ohci_hcd_at91_driver); +} +module_init(ohci_at91_init); + +static void __exit ohci_at91_cleanup(void) +{ + platform_driver_unregister(&ohci_hcd_at91_driver); +} +module_exit(ohci_at91_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:at91_ohci"); |