diff options
Diffstat (limited to 'target/linux/ramips/files/drivers/usb/host/ohci-rt3883.c')
| -rw-r--r-- | target/linux/ramips/files/drivers/usb/host/ohci-rt3883.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/target/linux/ramips/files/drivers/usb/host/ohci-rt3883.c b/target/linux/ramips/files/drivers/usb/host/ohci-rt3883.c new file mode 100644 index 000000000..ea13aebe5 --- /dev/null +++ b/target/linux/ramips/files/drivers/usb/host/ohci-rt3883.c @@ -0,0 +1,161 @@ +/* + * Bus Glue for the built-in OHCI controller of the Ralink RT3662/RT3883 SoCs + * + * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org> + * + * Parts of this file are based on Ralink's 2.6.21 BSP + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include <linux/platform_device.h> +#include <asm/mach-ralink/rt3883.h> +#include <asm/mach-ralink/rt3883_ohci_platform.h> + +static int __devinit ohci_rt3883_start(struct usb_hcd *hcd) +{ + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + int ret; + + ret = ohci_init(ohci); + if (ret < 0) + return ret; + + ret = ohci_run(ohci); + if (ret < 0) + goto err; + + return 0; + +err: + ohci_stop(hcd); + return ret; +} + +static const struct hc_driver ohci_rt3883_hc_driver = { + .description = hcd_name, + .product_desc = "Ralink RT3883 built-in OHCI controller", + .hcd_priv_size = sizeof(struct ohci_hcd), + + .irq = ohci_irq, + .flags = HCD_USB11 | HCD_MEMORY, + + .start = ohci_rt3883_start, + .stop = ohci_stop, + .shutdown = ohci_shutdown, + + .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_hub_status_data, + .hub_control = ohci_hub_control, + .start_port_reset = ohci_start_port_reset, +}; + +static int ohci_rt3883_probe(struct platform_device *pdev) +{ + struct rt3883_ohci_platform_data *pdata; + struct usb_hcd *hcd; + struct resource *res; + int irq; + int ret; + + if (usb_disabled()) + return -ENODEV; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_dbg(&pdev->dev, "no IRQ specified for %s\n", + dev_name(&pdev->dev)); + return -ENODEV; + } + irq = res->start; + + hcd = usb_create_hcd(&ohci_rt3883_hc_driver, + &pdev->dev, dev_name(&pdev->dev)); + 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", + dev_name(&pdev->dev)); + 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; + } + + pdata = pdev->dev.platform_data; + if (pdata && pdata->start_hw) + pdata->start_hw(); + + ohci_hcd_init(hcd_to_ohci(hcd)); + + ret = usb_add_hcd(hcd, irq, IRQF_SHARED); + if (ret) + goto err_stop_hcd; + + return 0; + +err_stop_hcd: + iounmap(hcd->regs); +err_release_region: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +err_put_hcd: + usb_put_hcd(hcd); + return ret; +} + +static int ohci_rt3883_remove(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct rt3883_ohci_platform_data *pdata; + + usb_remove_hcd(hcd); + iounmap(hcd->regs); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + usb_put_hcd(hcd); + + pdata = pdev->dev.platform_data; + if (pdata && pdata->stop_hw) + pdata->stop_hw(); + + return 0; +} + +static struct platform_driver ohci_rt3883_driver = { + .probe = ohci_rt3883_probe, + .remove = ohci_rt3883_remove, + .shutdown = usb_hcd_platform_shutdown, + .driver = { + .name = "rt3883-ohci", + .owner = THIS_MODULE, + }, +}; + +MODULE_ALIAS("platform:rt3883-ohci"); |