162 lines
3.5 KiB
C
162 lines
3.5 KiB
C
/*
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* Bus Glue for the built-in OHCI controller of the Ralink RT3662/RT3883 SoCs
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*
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* Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
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*
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* Parts of this file are based on Ralink's 2.6.21 BSP
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include <linux/platform_device.h>
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#include <asm/mach-ralink/rt3883.h>
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#include <asm/mach-ralink/rt3883_ohci_platform.h>
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static int __devinit ohci_rt3883_start(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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int ret;
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ret = ohci_init(ohci);
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if (ret < 0)
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return ret;
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ret = ohci_run(ohci);
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if (ret < 0)
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goto err;
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return 0;
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err:
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ohci_stop(hcd);
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return ret;
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}
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static const struct hc_driver ohci_rt3883_hc_driver = {
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.description = hcd_name,
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.product_desc = "Ralink RT3883 built-in OHCI controller",
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.hcd_priv_size = sizeof(struct ohci_hcd),
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.irq = ohci_irq,
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.flags = HCD_USB11 | HCD_MEMORY,
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.start = ohci_rt3883_start,
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.stop = ohci_stop,
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.shutdown = ohci_shutdown,
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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/*
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* scheduling support
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*/
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.get_frame_number = ohci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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.start_port_reset = ohci_start_port_reset,
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};
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static int ohci_rt3883_probe(struct platform_device *pdev)
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{
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struct rt3883_ohci_platform_data *pdata;
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struct usb_hcd *hcd;
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struct resource *res;
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int irq;
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int ret;
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if (usb_disabled())
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return -ENODEV;
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res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (!res) {
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dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
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dev_name(&pdev->dev));
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return -ENODEV;
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}
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irq = res->start;
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hcd = usb_create_hcd(&ohci_rt3883_hc_driver,
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&pdev->dev, dev_name(&pdev->dev));
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if (!hcd)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_dbg(&pdev->dev, "no base address specified for %s\n",
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dev_name(&pdev->dev));
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ret = -ENODEV;
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goto err_put_hcd;
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}
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = res->end - res->start + 1;
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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dev_dbg(&pdev->dev, "controller already in use\n");
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ret = -EBUSY;
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goto err_put_hcd;
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}
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hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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if (!hcd->regs) {
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dev_dbg(&pdev->dev, "error mapping memory\n");
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ret = -EFAULT;
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goto err_release_region;
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}
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pdata = pdev->dev.platform_data;
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if (pdata && pdata->start_hw)
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pdata->start_hw();
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ohci_hcd_init(hcd_to_ohci(hcd));
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ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (ret)
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goto err_stop_hcd;
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return 0;
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err_stop_hcd:
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iounmap(hcd->regs);
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err_release_region:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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err_put_hcd:
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usb_put_hcd(hcd);
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return ret;
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}
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static int ohci_rt3883_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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struct rt3883_ohci_platform_data *pdata;
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usb_remove_hcd(hcd);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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pdata = pdev->dev.platform_data;
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if (pdata && pdata->stop_hw)
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pdata->stop_hw();
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return 0;
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}
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static struct platform_driver ohci_rt3883_driver = {
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.probe = ohci_rt3883_probe,
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.remove = ohci_rt3883_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "rt3883-ohci",
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.owner = THIS_MODULE,
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},
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};
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MODULE_ALIAS("platform:rt3883-ohci");
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