| /* |
| * 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 Russell 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/arch/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"); |