/* * 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 Sharp LH7A404 * * Written by Christopher Hoover <ch@hpl.hp.com> * Based on fragments of previous driver by Rusell King et al. * * Modified for LH7A404 from ohci-sa1111.c * by Durgesh Pattamatta <pattamattad@sharpsec.com> * * This file is licenced under the GPL. */ #include <linux/platform_device.h> #include <linux/signal.h> #include <asm/hardware.h> extern int usb_disabled(void); /*-------------------------------------------------------------------------*/ static void lh7a404_start_hc(struct platform_device *dev) { printk(KERN_DEBUG __FILE__ ": starting LH7A404 OHCI USB Controller\n"); /* * Now, carefully enable the USB clock, and take * the USB host controller out of reset. */ CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */ udelay(1000); USBH_CMDSTATUS = OHCI_HCR; printk(KERN_DEBUG __FILE__ ": Clock to USB host has been enabled \n"); } static void lh7a404_stop_hc(struct platform_device *dev) { printk(KERN_DEBUG __FILE__ ": stopping LH7A404 OHCI USB Controller\n"); CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */ } /*-------------------------------------------------------------------------*/ /* configure so an HC device and id are always provided */ /* always called with process context; sleeping is OK */ /** * usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs * Context: !in_interrupt() * * Allocates basic resources for this USB host controller, and * then invokes the start() method for the HCD associated with it * through the hotplug entry's driver_data. * */ int usb_hcd_lh7a404_probe (const struct hc_driver *driver, struct platform_device *dev) { int retval; struct usb_hcd *hcd; if (dev->resource[1].flags != IORESOURCE_IRQ) { pr_debug("resource[1] is not IORESOURCE_IRQ"); return -ENOMEM; } hcd = usb_create_hcd(driver, &dev->dev, "lh7a404"); if (!hcd) return -ENOMEM; hcd->rsrc_start = dev->resource[0].start; hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { pr_debug("request_mem_region failed"); retval = -EBUSY; goto err1; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { pr_debug("ioremap failed"); retval = -ENOMEM; goto err2; } lh7a404_start_hc(dev); ohci_hcd_init(hcd_to_ohci(hcd)); retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED); if (retval == 0) return retval; lh7a404_stop_hc(dev); iounmap(hcd->regs); err2: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err1: usb_put_hcd(hcd); return retval; } /* may be called without controller electrically present */ /* may be called with controller, bus, and devices active */ /** * usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_lh7a404_probe(), first invoking * the HCD's stop() method. It is always called from a thread * context, normally "rmmod", "apmd", or something similar. * */ void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev) { usb_remove_hcd(hcd); lh7a404_stop_hc(dev); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); } /*-------------------------------------------------------------------------*/ static int __devinit ohci_lh7a404_start (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); int ret; ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci); if ((ret = ohci_init(ohci)) < 0) return ret; if ((ret = ohci_run (ohci)) < 0) { err ("can't start %s", hcd->self.bus_name); ohci_stop (hcd); return ret; } return 0; } /*-------------------------------------------------------------------------*/ static const struct hc_driver ohci_lh7a404_hc_driver = { .description = hcd_name, .product_desc = "LH7A404 OHCI", .hcd_priv_size = sizeof(struct ohci_hcd), /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, /* * basic lifecycle operations */ .start = ohci_lh7a404_start, .stop = ohci_stop, .shutdown = ohci_shutdown, /* * managing i/o requests and associated device resources */ .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, .hub_irq_enable = ohci_rhsc_enable, #ifdef CONFIG_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; /*-------------------------------------------------------------------------*/ static int ohci_hcd_lh7a404_drv_probe(struct platform_device *pdev) { int ret; pr_debug ("In ohci_hcd_lh7a404_drv_probe"); if (usb_disabled()) return -ENODEV; ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev); return ret; } static int ohci_hcd_lh7a404_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_hcd_lh7a404_remove(hcd, pdev); return 0; } /*TBD*/ /*static int ohci_hcd_lh7a404_drv_suspend(struct platform_device *dev) { struct usb_hcd *hcd = platform_get_drvdata(dev); return 0; } static int ohci_hcd_lh7a404_drv_resume(struct platform_device *dev) { struct usb_hcd *hcd = platform_get_drvdata(dev); return 0; } */ static struct platform_driver ohci_hcd_lh7a404_driver = { .probe = ohci_hcd_lh7a404_drv_probe, .remove = ohci_hcd_lh7a404_drv_remove, .shutdown = usb_hcd_platform_shutdown, /*.suspend = ohci_hcd_lh7a404_drv_suspend, */ /*.resume = ohci_hcd_lh7a404_drv_resume, */ .driver = { .name = "lh7a404-ohci", .owner = THIS_MODULE, }, }; MODULE_ALIAS("platform:lh7a404-ohci");