USB: OHCI support for PNX8550
OHCI HCD (Host Controller Driver) for USB. Bus Glue for PNX8550. Signed-off-by: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Vitaly Wool
Greg Kroah-Hartman
parent
23d10a9e37
commit
5151d04068
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@ -885,6 +885,10 @@ MODULE_LICENSE ("GPL");
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#include "ohci-au1xxx.c"
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#endif
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#ifdef CONFIG_PNX8550
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#include "ohci-pnx8550.c"
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#endif
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#ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
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#include "ohci-ppc-soc.c"
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#endif
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@ -0,0 +1,258 @@
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/*
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* OHCI HCD (Host Controller Driver) for USB.
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*
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* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
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* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
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* (C) Copyright 2002 Hewlett-Packard Company
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* (C) Copyright 2005 Embedded Alley Solutions, Inc.
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*
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* Bus Glue for PNX8550
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*
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* Written by Christopher Hoover <ch@hpl.hp.com>
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* Based on fragments of previous driver by Russell King et al.
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*
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* Modified for LH7A404 from ohci-sa1111.c
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* by Durgesh Pattamatta <pattamattad@sharpsec.com>
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*
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* Modified for PNX8550 from ohci-sa1111.c and sa-omap.c
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* by Vitaly Wool <vitalywool@gmail.com>
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*
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* This file is licenced under the GPL.
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*/
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <asm/mach-pnx8550/usb.h>
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#include <asm/mach-pnx8550/int.h>
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#include <asm/mach-pnx8550/pci.h>
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#ifndef CONFIG_PNX8550
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#error "This file is PNX8550 bus glue. CONFIG_PNX8550 must be defined."
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#endif
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extern int usb_disabled(void);
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/*-------------------------------------------------------------------------*/
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static void pnx8550_start_hc(struct platform_device *dev)
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{
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/*
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* Set register CLK48CTL to enable and 48MHz
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*/
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outl(0x00000003, PCI_BASE | 0x0004770c);
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/*
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* Set register CLK12CTL to enable and 48MHz
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*/
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outl(0x00000003, PCI_BASE | 0x00047710);
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udelay(100);
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}
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static void pnx8550_stop_hc(struct platform_device *dev)
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{
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udelay(10);
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}
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/*-------------------------------------------------------------------------*/
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/* configure so an HC device and id are always provided */
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/* always called with process context; sleeping is OK */
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/**
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* usb_hcd_pnx8550_probe - initialize pnx8550-based HCDs
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* Context: !in_interrupt()
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*
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* Allocates basic resources for this USB host controller, and
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* then invokes the start() method for the HCD associated with it
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* through the hotplug entry's driver_data.
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*
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*/
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int usb_hcd_pnx8550_probe (const struct hc_driver *driver,
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struct platform_device *dev)
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{
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int retval;
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struct usb_hcd *hcd;
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if (dev->resource[0].flags != IORESOURCE_MEM ||
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dev->resource[1].flags != IORESOURCE_IRQ) {
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dev_err (&dev->dev,"invalid resource type\n");
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return -ENOMEM;
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}
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hcd = usb_create_hcd (driver, &dev->dev, "pnx8550");
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if (!hcd)
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return -ENOMEM;
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hcd->rsrc_start = dev->resource[0].start;
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hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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dev_err(&dev->dev, "request_mem_region [0x%08llx, 0x%08llx] "
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"failed\n", hcd->rsrc_start, hcd->rsrc_len);
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retval = -EBUSY;
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goto err1;
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}
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hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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if (!hcd->regs) {
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dev_err(&dev->dev, "ioremap [[0x%08llx, 0x%08llx] failed\n",
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hcd->rsrc_start, hcd->rsrc_len);
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retval = -ENOMEM;
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goto err2;
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}
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pnx8550_start_hc(dev);
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ohci_hcd_init(hcd_to_ohci(hcd));
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retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
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if (retval == 0)
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return retval;
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pnx8550_stop_hc(dev);
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iounmap(hcd->regs);
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err2:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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err1:
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usb_put_hcd(hcd);
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return retval;
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}
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/* may be called without controller electrically present */
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/* may be called with controller, bus, and devices active */
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/**
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* usb_hcd_pnx8550_remove - shutdown processing for pnx8550-based HCDs
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* @dev: USB Host Controller being removed
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* Context: !in_interrupt()
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*
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* Reverses the effect of usb_hcd_pnx8550_probe(), first invoking
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* the HCD's stop() method. It is always called from a thread
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* context, normally "rmmod", "apmd", or something similar.
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*
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*/
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void usb_hcd_pnx8550_remove (struct usb_hcd *hcd, struct platform_device *dev)
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{
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usb_remove_hcd(hcd);
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pnx8550_stop_hc(dev);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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}
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/*-------------------------------------------------------------------------*/
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static int __devinit
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ohci_pnx8550_start (struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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int ret;
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ohci_dbg (ohci, "ohci_pnx8550_start, ohci:%p", ohci);
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if ((ret = ohci_init(ohci)) < 0)
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return ret;
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if ((ret = ohci_run (ohci)) < 0) {
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err ("can't start %s", hcd->self.bus_name);
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ohci_stop (hcd);
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return ret;
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}
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return 0;
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}
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/*-------------------------------------------------------------------------*/
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static const struct hc_driver ohci_pnx8550_hc_driver = {
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.description = hcd_name,
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.product_desc = "PNX8550 OHCI",
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.hcd_priv_size = sizeof(struct ohci_hcd),
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/*
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* generic hardware linkage
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*/
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.irq = ohci_irq,
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.flags = HCD_USB11 | HCD_MEMORY,
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/*
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* basic lifecycle operations
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*/
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.start = ohci_pnx8550_start,
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.stop = ohci_stop,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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/*
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* scheduling support
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*/
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.get_frame_number = ohci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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.hub_irq_enable = ohci_rhsc_enable,
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#ifdef CONFIG_PM
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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#endif
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.start_port_reset = ohci_start_port_reset,
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};
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/*-------------------------------------------------------------------------*/
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static int ohci_hcd_pnx8550_drv_probe(struct platform_device *pdev)
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{
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int ret;
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if (usb_disabled())
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return -ENODEV;
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ret = usb_hcd_pnx8550_probe(&ohci_pnx8550_hc_driver, pdev);
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return ret;
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}
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static int ohci_hcd_pnx8550_drv_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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usb_hcd_pnx8550_remove(hcd, pdev);
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return 0;
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}
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MODULE_ALIAS("pnx8550-ohci");
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static struct platform_driver ohci_hcd_pnx8550_driver = {
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.driver = {
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.name = "pnx8550-ohci",
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},
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.probe = ohci_hcd_pnx8550_drv_probe,
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.remove = ohci_hcd_pnx8550_drv_remove,
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};
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static int __init ohci_hcd_pnx8550_init (void)
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{
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pr_debug (DRIVER_INFO " (pnx8550)");
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pr_debug ("block sizes: ed %d td %d\n",
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sizeof (struct ed), sizeof (struct td));
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return platform_driver_register(&ohci_hcd_pnx8550_driver);
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}
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static void __exit ohci_hcd_pnx8550_cleanup (void)
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{
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platform_driver_unregister(&ohci_hcd_pnx8550_driver);
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}
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module_init (ohci_hcd_pnx8550_init);
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module_exit (ohci_hcd_pnx8550_cleanup);
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