+++ /dev/null
-/*
- * EHCI HCD (Host Controller Driver) for USB.
- *
- * (C) Copyright 2006-2007 Stefan Roese <sr@denx.de>, DENX Software Engineering
- *
- * Bus Glue for PPC On-Chip EHCI driver
- * Tested on AMCC 440EPx
- *
- * Based on "ehci-au1xxx.c" by K.Boge <karsten.boge@amd.com>
- *
- * This file is licenced under the GPL.
- */
-
-#include <linux/platform_device.h>
-
-extern int usb_disabled(void);
-
-/* called during probe() after chip reset completes */
-static int ehci_ppc_soc_setup(struct usb_hcd *hcd)
-{
- struct ehci_hcd *ehci = hcd_to_ehci(hcd);
- int retval;
-
- retval = ehci_halt(ehci);
- if (retval)
- return retval;
-
- retval = ehci_init(hcd);
- if (retval)
- return retval;
-
- ehci->sbrn = 0x20;
- return ehci_reset(ehci);
-}
-
-/**
- * usb_ehci_ppc_soc_probe - initialize PPC-SoC-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_ehci_ppc_soc_probe(const struct hc_driver *driver,
- struct usb_hcd **hcd_out,
- struct platform_device *dev)
-{
- int retval;
- struct usb_hcd *hcd;
- struct ehci_hcd *ehci;
-
- if (dev->resource[1].flags != IORESOURCE_IRQ) {
- pr_debug("resource[1] is not IORESOURCE_IRQ");
- retval = -ENOMEM;
- }
- hcd = usb_create_hcd(driver, &dev->dev, "PPC-SOC EHCI");
- 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;
- }
-
- ehci = hcd_to_ehci(hcd);
- ehci->big_endian_mmio = 1;
- ehci->big_endian_desc = 1;
- ehci->caps = hcd->regs;
- ehci->regs = hcd->regs + HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
-
- /* cache this readonly data; minimize chip reads */
- ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
-
-#if defined(CONFIG_440EPX)
- /*
- * 440EPx Errata USBH_3
- * Fix: Enable Break Memory Transfer (BMT) in INSNREG3
- */
- out_be32((void *)((ulong)(&ehci->regs->command) + 0x8c), (1 << 0));
- ehci_dbg(ehci, "Break Memory Transfer (BMT) has beed enabled!\n");
-#endif
-
- retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED);
- if (retval == 0)
- return retval;
-
- 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_ehci_hcd_ppc_soc_remove - shutdown processing for PPC-SoC-based HCDs
- * @dev: USB Host Controller being removed
- * Context: !in_interrupt()
- *
- * Reverses the effect of usb_ehci_hcd_ppc_soc_probe(), first invoking
- * the HCD's stop() method. It is always called from a thread
- * context, normally "rmmod", "apmd", or something similar.
- *
- */
-void usb_ehci_ppc_soc_remove(struct usb_hcd *hcd, struct platform_device *dev)
-{
- usb_remove_hcd(hcd);
- iounmap(hcd->regs);
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
- usb_put_hcd(hcd);
-}
-
-static const struct hc_driver ehci_ppc_soc_hc_driver = {
- .description = hcd_name,
- .product_desc = "PPC-SOC EHCI",
- .hcd_priv_size = sizeof(struct ehci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ehci_irq,
- .flags = HCD_MEMORY | HCD_USB2,
-
- /*
- * basic lifecycle operations
- */
- .reset = ehci_ppc_soc_setup,
- .start = ehci_run,
- .stop = ehci_stop,
- .shutdown = ehci_shutdown,
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = ehci_urb_enqueue,
- .urb_dequeue = ehci_urb_dequeue,
- .endpoint_disable = ehci_endpoint_disable,
-
- /*
- * scheduling support
- */
- .get_frame_number = ehci_get_frame,
-
- /*
- * root hub support
- */
- .hub_status_data = ehci_hub_status_data,
- .hub_control = ehci_hub_control,
- .bus_suspend = ehci_bus_suspend,
- .bus_resume = ehci_bus_resume,
- .relinquish_port = ehci_relinquish_port,
- .port_handed_over = ehci_port_handed_over,
-};
-
-static int ehci_hcd_ppc_soc_drv_probe(struct platform_device *pdev)
-{
- struct usb_hcd *hcd = NULL;
- int ret;
-
- pr_debug("In ehci_hcd_ppc_soc_drv_probe\n");
-
- if (usb_disabled())
- return -ENODEV;
-
- /* FIXME we only want one one probe() not two */
- ret = usb_ehci_ppc_soc_probe(&ehci_ppc_soc_hc_driver, &hcd, pdev);
- return ret;
-}
-
-static int ehci_hcd_ppc_soc_drv_remove(struct platform_device *pdev)
-{
- struct usb_hcd *hcd = platform_get_drvdata(pdev);
-
- /* FIXME we only want one one remove() not two */
- usb_ehci_ppc_soc_remove(hcd, pdev);
- return 0;
-}
-
-MODULE_ALIAS("platform:ppc-soc-ehci");
-static struct platform_driver ehci_ppc_soc_driver = {
- .probe = ehci_hcd_ppc_soc_drv_probe,
- .remove = ehci_hcd_ppc_soc_drv_remove,
- .shutdown = usb_hcd_platform_shutdown,
- .driver = {
- .name = "ppc-soc-ehci",
- }
-};
projects / linux-2.6-omap-h63xx.git / commitdiff