/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> * (C) Copyright 2002 Hewlett-Packard Company * * Bus Glue for ep93xx. * * Written by Christopher Hoover <ch@hpl.hp.com> * Based on fragments of previous driver by Russell King et al. * * Modified for LH7A404 from ohci-sa1111.c * by Durgesh Pattamatta <pattamattad@sharpsec.com> * * Modified for pxa27x from ohci-lh7a404.c * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004 * * Modified for ep93xx from ohci-pxa27x.c * by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006 * Based on an earlier driver by Ray Lehtiniemi * * This file is licenced under the GPL. */ #include <linux/clk.h> #include <linux/device.h> #include <linux/signal.h> #include <linux/platform_device.h> static struct clk *usb_host_clock; static void ep93xx_start_hc(struct device *dev) { clk_enable(usb_host_clock); } static void ep93xx_stop_hc(struct device *dev) { clk_disable(usb_host_clock); } static int usb_hcd_ep93xx_probe(const struct hc_driver *driver, struct platform_device *pdev) { int retval; struct usb_hcd *hcd; if (pdev->resource[1].flags != IORESOURCE_IRQ) { dev_dbg(&pdev->dev, "resource[1] is not IORESOURCE_IRQ\n"); return -ENOMEM; } hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx"); if (hcd == NULL) return -ENOMEM; hcd->rsrc_start = pdev->resource[0].start; hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { usb_put_hcd(hcd); retval = -EBUSY; goto err1; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (hcd->regs == NULL) { dev_dbg(&pdev->dev, "ioremap failed\n"); retval = -ENOMEM; goto err2; } usb_host_clock = clk_get(&pdev->dev, NULL); if (IS_ERR(usb_host_clock)) { dev_dbg(&pdev->dev, "clk_get failed\n"); retval = PTR_ERR(usb_host_clock); goto err3; } ep93xx_start_hc(&pdev->dev); ohci_hcd_init(hcd_to_ohci(hcd)); retval = usb_add_hcd(hcd, pdev->resource[1].start, 0); if (retval == 0) return retval; ep93xx_stop_hc(&pdev->dev); err3: iounmap(hcd->regs); err2: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err1: usb_put_hcd(hcd); return retval; } static void usb_hcd_ep93xx_remove(struct usb_hcd *hcd, struct platform_device *pdev) { usb_remove_hcd(hcd); ep93xx_stop_hc(&pdev->dev); clk_put(usb_host_clock); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); } static int __devinit ohci_ep93xx_start(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); int ret; if ((ret = ohci_init(ohci)) < 0) return 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 struct hc_driver ohci_ep93xx_hc_driver = { .description = hcd_name, .product_desc = "EP93xx OHCI", .hcd_priv_size = sizeof(struct ohci_hcd), .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, .start = ohci_ep93xx_start, .stop = ohci_stop, .shutdown = ohci_shutdown, .urb_enqueue = ohci_urb_enqueue, .urb_dequeue = ohci_urb_dequeue, .endpoint_disable = ohci_endpoint_disable, .get_frame_number = ohci_get_frame, .hub_status_data = ohci_hub_status_data, .hub_control = ohci_hub_control, #ifdef CONFIG_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; extern int usb_disabled(void); static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev) { int ret; ret = -ENODEV; if (!usb_disabled()) ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev); return ret; } static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_hcd_ep93xx_remove(hcd, pdev); return 0; } #ifdef CONFIG_PM static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state) { struct usb_hcd *hcd = platform_get_drvdata(pdev); struct ohci_hcd *ohci = hcd_to_ohci(hcd); if (time_before(jiffies, ohci->next_statechange)) msleep(5); ohci->next_statechange = jiffies; ep93xx_stop_hc(&pdev->dev); return 0; } static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); struct ohci_hcd *ohci = hcd_to_ohci(hcd); if (time_before(jiffies, ohci->next_statechange)) msleep(5); ohci->next_statechange = jiffies; ep93xx_start_hc(&pdev->dev); ohci_finish_controller_resume(hcd); return 0; } #endif static struct platform_driver ohci_hcd_ep93xx_driver = { .probe = ohci_hcd_ep93xx_drv_probe, .remove = ohci_hcd_ep93xx_drv_remove, .shutdown = usb_hcd_platform_shutdown, #ifdef CONFIG_PM .suspend = ohci_hcd_ep93xx_drv_suspend, .resume = ohci_hcd_ep93xx_drv_resume, #endif .driver = { .name = "ep93xx-ohci", .owner = THIS_MODULE, }, }; MODULE_ALIAS("platform:ep93xx-ohci");