diff options
Diffstat (limited to 'drivers/usb/host/ehci-tegra.c')
| -rw-r--r-- | drivers/usb/host/ehci-tegra.c | 128 |
1 files changed, 74 insertions, 54 deletions
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index 80634292efee..338c8a56118d 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -17,25 +17,44 @@ */ #include <linux/clk.h> +#include <linux/clk/tegra.h> +#include <linux/dma-mapping.h> #include <linux/err.h> -#include <linux/platform_device.h> -#include <linux/platform_data/tegra_usb.h> -#include <linux/irq.h> -#include <linux/usb/otg.h> #include <linux/gpio.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/module.h> #include <linux/of.h> #include <linux/of_gpio.h> +#include <linux/platform_device.h> +#include <linux/platform_data/tegra_usb.h> #include <linux/pm_runtime.h> +#include <linux/slab.h> #include <linux/usb/ehci_def.h> #include <linux/usb/tegra_usb_phy.h> -#include <linux/clk/tegra.h> +#include <linux/usb.h> +#include <linux/usb/hcd.h> +#include <linux/usb/otg.h> + +#include "ehci.h" #define TEGRA_USB_BASE 0xC5000000 #define TEGRA_USB2_BASE 0xC5004000 #define TEGRA_USB3_BASE 0xC5008000 +#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) + #define TEGRA_USB_DMA_ALIGN 32 +#define DRIVER_DESC "Tegra EHCI driver" +#define DRV_NAME "tegra-ehci" + +static struct hc_driver __read_mostly tegra_ehci_hc_driver; + +static int (*orig_hub_control)(struct usb_hcd *hcd, + u16 typeReq, u16 wValue, u16 wIndex, + char *buf, u16 wLength); + struct tegra_ehci_hcd { struct ehci_hcd *ehci; struct tegra_usb_phy *phy; @@ -218,25 +237,13 @@ static int tegra_ehci_hub_control( spin_unlock_irqrestore(&ehci->lock, flags); /* Handle the hub control events here */ - return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); + return orig_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); + done: spin_unlock_irqrestore(&ehci->lock, flags); return retval; } -static int tegra_ehci_setup(struct usb_hcd *hcd) -{ - struct ehci_hcd *ehci = hcd_to_ehci(hcd); - - /* EHCI registers start at offset 0x100 */ - ehci->caps = hcd->regs + 0x100; - - /* switch to host mode */ - hcd->has_tt = 1; - - return ehci_setup(hcd); -} - struct dma_aligned_buffer { void *kmalloc_ptr; void *old_xfer_buffer; @@ -316,38 +323,6 @@ static void tegra_ehci_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) free_dma_aligned_buffer(urb); } -static const struct hc_driver tegra_ehci_hc_driver = { - .description = hcd_name, - .product_desc = "Tegra EHCI Host Controller", - .hcd_priv_size = sizeof(struct ehci_hcd), - .flags = HCD_USB2 | HCD_MEMORY, - - /* standard ehci functions */ - .irq = ehci_irq, - .start = ehci_run, - .stop = ehci_stop, - .urb_enqueue = ehci_urb_enqueue, - .urb_dequeue = ehci_urb_dequeue, - .endpoint_disable = ehci_endpoint_disable, - .endpoint_reset = ehci_endpoint_reset, - .get_frame_number = ehci_get_frame, - .hub_status_data = ehci_hub_status_data, - .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, - .relinquish_port = ehci_relinquish_port, - .port_handed_over = ehci_port_handed_over, - - /* modified ehci functions for tegra */ - .reset = tegra_ehci_setup, - .shutdown = ehci_shutdown, - .map_urb_for_dma = tegra_ehci_map_urb_for_dma, - .unmap_urb_for_dma = tegra_ehci_unmap_urb_for_dma, - .hub_control = tegra_ehci_hub_control, -#ifdef CONFIG_PM - .bus_suspend = ehci_bus_suspend, - .bus_resume = ehci_bus_resume, -#endif -}; - static int setup_vbus_gpio(struct platform_device *pdev, struct tegra_ehci_platform_data *pdata) { @@ -444,6 +419,9 @@ static int tegra_ehci_probe(struct platform_device *pdev) err = -ENOMEM; goto cleanup_clk; } + tegra->ehci = hcd_to_ehci(hcd); + + hcd->has_tt = 1; hcd->phy = u_phy; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -460,6 +438,7 @@ static int tegra_ehci_probe(struct platform_device *pdev) err = -ENOMEM; goto cleanup_hcd_create; } + tegra->ehci->caps = hcd->regs + 0x100; err = usb_phy_init(hcd->phy); if (err) { @@ -482,8 +461,6 @@ static int tegra_ehci_probe(struct platform_device *pdev) goto cleanup_phy; } - tegra->ehci = hcd_to_ehci(hcd); - irq = platform_get_irq(pdev, 0); if (!irq) { dev_err(&pdev->dev, "Failed to get IRQ\n"); @@ -558,7 +535,50 @@ static struct platform_driver tegra_ehci_driver = { .remove = tegra_ehci_remove, .shutdown = tegra_ehci_hcd_shutdown, .driver = { - .name = "tegra-ehci", + .name = DRV_NAME, .of_match_table = tegra_ehci_of_match, } }; + +static const struct ehci_driver_overrides tegra_overrides __initconst = { + .extra_priv_size = sizeof(struct tegra_ehci_hcd), +}; + +static int __init ehci_tegra_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info(DRV_NAME ": " DRIVER_DESC "\n"); + + ehci_init_driver(&tegra_ehci_hc_driver, &tegra_overrides); + + /* + * The Tegra HW has some unusual quirks, which require Tegra-specific + * workarounds. We override certain hc_driver functions here to + * achieve that. We explicitly do not enhance ehci_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_hub_control = tegra_ehci_hc_driver.hub_control; + + tegra_ehci_hc_driver.map_urb_for_dma = tegra_ehci_map_urb_for_dma; + tegra_ehci_hc_driver.unmap_urb_for_dma = tegra_ehci_unmap_urb_for_dma; + tegra_ehci_hc_driver.hub_control = tegra_ehci_hub_control; + + return platform_driver_register(&tegra_ehci_driver); +} +module_init(ehci_tegra_init); + +static void __exit ehci_tegra_cleanup(void) +{ + platform_driver_unregister(&tegra_ehci_driver); +} +module_exit(ehci_tegra_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME); +MODULE_DEVICE_TABLE(of, tegra_ehci_of_match); |
