/* * 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 * (C) Copyright 2005 Embedded Alley Solutions, Inc. * * Bus Glue for PNX8550 * * 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 PNX8550 from ohci-sa1111.c and sa-omap.c * by Vitaly Wool <vitalywool@gmail.com> * * This file is licenced under the GPL. */ #include <linux/device.h> #include <linux/platform_device.h> #include <asm/mach-pnx8550/usb.h> #include <asm/mach-pnx8550/int.h> #include <asm/mach-pnx8550/pci.h> #ifndef CONFIG_PNX8550 #error "This file is PNX8550 bus glue. CONFIG_PNX8550 must be defined." #endif extern int usb_disabled(void); /*-------------------------------------------------------------------------*/ static void pnx8550_start_hc(struct platform_device *dev) { /* * Set register CLK48CTL to enable and 48MHz */ outl(0x00000003, PCI_BASE | 0x0004770c); /* * Set register CLK12CTL to enable and 48MHz */ outl(0x00000003, PCI_BASE | 0x00047710); udelay(100); } static void pnx8550_stop_hc(struct platform_device *dev) { udelay(10); } /*-------------------------------------------------------------------------*/ /* configure so an HC device and id are always provided */ /* always called with process context; sleeping is OK */ /** * usb_hcd_pnx8550_probe - initialize pnx8550-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_pnx8550_probe (const struct hc_driver *driver, struct platform_device *dev) { int retval; struct usb_hcd *hcd; if (dev->resource[0].flags != IORESOURCE_MEM || dev->resource[1].flags != IORESOURCE_IRQ) { dev_err (&dev->dev,"invalid resource type\n"); return -ENOMEM; } hcd = usb_create_hcd (driver, &dev->dev, "pnx8550"); 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)) { dev_err(&dev->dev, "request_mem_region [0x%08llx, 0x%08llx] " "failed\n", hcd->rsrc_start, hcd->rsrc_len); retval = -EBUSY; goto err1; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { dev_err(&dev->dev, "ioremap [[0x%08llx, 0x%08llx] failed\n", hcd->rsrc_start, hcd->rsrc_len); retval = -ENOMEM; goto err2; } pnx8550_start_hc(dev); ohci_hcd_init(hcd_to_ohci(hcd)); retval = usb_add_hcd(hcd, dev->resource[1].start, 0); if (retval == 0) return retval; pnx8550_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_pnx8550_remove - shutdown processing for pnx8550-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_pnx8550_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_pnx8550_remove (struct usb_hcd *hcd, struct platform_device *dev) { usb_remove_hcd(hcd); pnx8550_stop_hc(dev); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); } /*-------------------------------------------------------------------------*/ static int __devinit ohci_pnx8550_start (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); int ret; ohci_dbg (ohci, "ohci_pnx8550_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_pnx8550_hc_driver = { .description = hcd_name, .product_desc = "PNX8550 OHCI", .hcd_priv_size = sizeof(struct ohci_hcd), /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, /* * basic lifecycle operations */ .start = ohci_pnx8550_start, .stop = ohci_stop, /* * 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, #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_pnx8550_drv_probe(struct platform_device *pdev) { int ret; if (usb_disabled()) return -ENODEV; ret = usb_hcd_pnx8550_probe(&ohci_pnx8550_hc_driver, pdev); return ret; } static int ohci_hcd_pnx8550_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_hcd_pnx8550_remove(hcd, pdev); return 0; } MODULE_ALIAS("platform:pnx8550-ohci"); static struct platform_driver ohci_hcd_pnx8550_driver = { .driver = { .name = "pnx8550-ohci", .owner = THIS_MODULE, }, .probe = ohci_hcd_pnx8550_drv_probe, .remove = ohci_hcd_pnx8550_drv_remove, };