diff options
Diffstat (limited to 'target/linux/ar71xx/files/drivers/usb/host/ehci-ar71xx.c')
| -rw-r--r-- | target/linux/ar71xx/files/drivers/usb/host/ehci-ar71xx.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/drivers/usb/host/ehci-ar71xx.c b/target/linux/ar71xx/files/drivers/usb/host/ehci-ar71xx.c new file mode 100644 index 000000000..6c7f29f6c --- /dev/null +++ b/target/linux/ar71xx/files/drivers/usb/host/ehci-ar71xx.c @@ -0,0 +1,193 @@ +/* + * EHCI HCD (Host Controller Driver) for USB. + * + * Copyright (C) 2007 Atheros Communications, Inc. + * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> + * + * Bus Glue for Atheros AR71xx built-in EHCI controller + * + */ + +#include <linux/platform_device.h> +#include <linux/delay.h> + +extern int usb_disabled(void); + +static void ar71xx_start_ehci(struct platform_device *pdev) +{ +} + +static void ar71xx_stop_ehci(struct platform_device *pdev) +{ + /* + * TODO: implement + */ +} + +int usb_ehci_ar71xx_probe(const struct hc_driver *driver, + struct usb_hcd **hcd_out, + struct platform_device *pdev) +{ + struct usb_hcd *hcd; + struct ehci_hcd *ehci; + struct resource *res; + int irq; + int ret; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_dbg(&pdev->dev, "no IRQ specified for %s\n", + pdev->dev.bus_id); + return -ENODEV; + } + irq = res->start; + + hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id); + if (!hcd) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_dbg(&pdev->dev, "no base address specified for %s\n", + pdev->dev.bus_id); + ret = -ENODEV; + goto err_put_hcd; + } + hcd->rsrc_start = res->start; + hcd->rsrc_len = res->end - res->start + 1; + + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { + dev_dbg(&pdev->dev, "controller already in use\n"); + ret = -EBUSY; + goto err_put_hcd; + } + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + if (!hcd->regs) { + dev_dbg(&pdev->dev, "error mapping memory\n"); + ret = -EFAULT; + goto err_release_region; + } + + ar71xx_start_ehci(pdev); + +#if 0 + ehci = hcd_to_ehci(hcd); + ehci->caps = hcd->regs; + ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase)); + ehci->hcs_params = readl(&ehci->caps->hcs_params); +#endif + + ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); + if (ret) + goto err_stop_ehc; + + return 0; + +err_stop_ehc: + ar71xx_stop_ehci(pdev); + iounmap(hcd->regs); + +err_release_region: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +err_put_hcd: + usb_put_hcd(hcd); + return ret; +} + +/* may be called without controller electrically present */ +/* may be called with controller, bus, and devices active */ + +/** + * usb_ehci_ar71xx_remove - shutdown processing for AR71xx-based HCDs + * @dev: USB Host Controller being removed + * Context: !in_interrupt() + * + * Reverses the effect of usb_hcd_ar71xx_probe(), first invoking + * the HCD's stop() method. It is always called from a thread + * context, normally "rmmod", "apmd", or something similar. + * + */ +static void usb_ehci_ar71xx_remove(struct usb_hcd *hcd, + struct platform_device *pdev) +{ + usb_remove_hcd(hcd); + ar71xx_stop_ehci(pdev); + iounmap(hcd->regs); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + usb_put_hcd(hcd); +} + +static const struct hc_driver ehci_ar71xx_hc_driver = { + .description = hcd_name, + .product_desc = "Atheros AR71xx built-in EHCI controller", + .hcd_priv_size = sizeof(struct ehci_hcd), + /* + * generic hardware linkage + */ + .irq = ehci_irq, + .flags = HCD_MEMORY | HCD_USB2, + + /* + * basic lifecycle operations + */ + .reset = ehci_init, + .start = ehci_run, + .stop = ehci_stop, + .shutdown = ehci_shutdown, + + /* + * managing i/o requests and associated device resources + */ + .urb_enqueue = ehci_urb_enqueue, + .urb_dequeue = ehci_urb_dequeue, + .endpoint_disable = ehci_endpoint_disable, + + /* + * scheduling support + */ + .get_frame_number = ehci_get_frame, + + /* + * root hub support + */ + .hub_status_data = ehci_hub_status_data, + .hub_control = ehci_hub_control, +#ifdef CONFIG_PM + .hub_suspend = ehci_hub_suspend, + .hub_resume = ehci_hub_resume, +#endif +}; + +static int ehci_hcd_ar71xx_drv_probe(struct platform_device *pdev) +{ + struct usb_hcd *hcd = NULL; + int ret; + + ret = -ENODEV; + if (!usb_disabled()) + ret = usb_ehci_ar71xx_probe(&ehci_ar71xx_hc_driver, &hcd, pdev); + + return ret; +} + +static int ehci_hcd_ar71xx_drv_remove(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + + usb_ehci_ar71xx_remove(hcd, pdev); + return 0; +} + +static struct platform_driver ehci_hcd_ar71xx_driver = { + .probe = ehci_hcd_ar71xx_drv_probe, + .remove = ehci_hcd_ar71xx_drv_remove, + .shutdown = usb_hcd_platform_shutdown, + .driver = { + .name = "ar71xx-ehci", + .bus = &platform_bus_type + } +}; + +MODULE_ALIAS("ar71xx-ehci"); |