LXR linux/drivers/usb/host/ehci-sead3.c

   1/*
   2 * MIPS CI13320A EHCI Host Controller driver
   3 * Based on "ehci-au1xxx.c" by K.Boge <karsten.boge@amd.com>
   4 *
   5 * Copyright (C) 2012 MIPS Technologies, Inc.
   6 *
   7 * This program is free software; you can redistribute it and/or modify it
   8 * under the terms of the GNU General Public License as published by the
   9 * Free Software Foundation; either version 2 of the License, or (at your
  10 * option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful, but
  13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 * for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software Foundation,
  19 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22#include <linux/err.h>
  23#include <linux/platform_device.h>
  24
  25static int ehci_sead3_setup(struct usb_hcd *hcd)
  26{
  27        int ret;
  28        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
  29
  30        ehci->caps = hcd->regs + 0x100;
  31
  32#ifdef __BIG_ENDIAN
  33        ehci->big_endian_mmio = 1;
  34        ehci->big_endian_desc = 1;
  35#endif
  36
  37        ret = ehci_setup(hcd);
  38        if (ret)
  39                return ret;
  40
  41        ehci->need_io_watchdog = 0;
  42
  43        /* Set burst length to 16 words. */
  44        ehci_writel(ehci, 0x1010, &ehci->regs->reserved1[1]);
  45
  46        return ret;
  47}
  48
  49const struct hc_driver ehci_sead3_hc_driver = {
  50        .description            = hcd_name,
  51        .product_desc           = "SEAD-3 EHCI",
  52        .hcd_priv_size          = sizeof(struct ehci_hcd),
  53
  54        /*
  55         * generic hardware linkage
  56         */
  57        .irq                    = ehci_irq,
  58        .flags                  = HCD_MEMORY | HCD_USB2 | HCD_BH,
  59
  60        /*
  61         * basic lifecycle operations
  62         *
  63         */
  64        .reset                  = ehci_sead3_setup,
  65        .start                  = ehci_run,
  66        .stop                   = ehci_stop,
  67        .shutdown               = ehci_shutdown,
  68
  69        /*
  70         * managing i/o requests and associated device resources
  71         */
  72        .urb_enqueue            = ehci_urb_enqueue,
  73        .urb_dequeue            = ehci_urb_dequeue,
  74        .endpoint_disable       = ehci_endpoint_disable,
  75        .endpoint_reset         = ehci_endpoint_reset,
  76
  77        /*
  78         * scheduling support
  79         */
  80        .get_frame_number       = ehci_get_frame,
  81
  82        /*
  83         * root hub support
  84         */
  85        .hub_status_data        = ehci_hub_status_data,
  86        .hub_control            = ehci_hub_control,
  87        .bus_suspend            = ehci_bus_suspend,
  88        .bus_resume             = ehci_bus_resume,
  89        .relinquish_port        = ehci_relinquish_port,
  90        .port_handed_over       = ehci_port_handed_over,
  91
  92        .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
  93};
  94
  95static int ehci_hcd_sead3_drv_probe(struct platform_device *pdev)
  96{
  97        struct usb_hcd *hcd;
  98        struct resource *res;
  99        int ret;
 100
 101        if (usb_disabled())
 102                return -ENODEV;
 103
 104        if (pdev->resource[1].flags != IORESOURCE_IRQ) {
 105                pr_debug("resource[1] is not IORESOURCE_IRQ");
 106                return -ENOMEM;
 107        }
 108        hcd = usb_create_hcd(&ehci_sead3_hc_driver, &pdev->dev, "SEAD-3");
 109        if (!hcd)
 110                return -ENOMEM;
 111
 112        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 113        hcd->regs = devm_ioremap_resource(&pdev->dev, res);
 114        if (IS_ERR(hcd->regs)) {
 115                ret = PTR_ERR(hcd->regs);
 116                goto err1;
 117        }
 118        hcd->rsrc_start = res->start;
 119        hcd->rsrc_len = resource_size(res);
 120
 121        /* Root hub has integrated TT. */
 122        hcd->has_tt = 1;
 123
 124        ret = usb_add_hcd(hcd, pdev->resource[1].start,
 125                          IRQF_SHARED);
 126        if (ret == 0) {
 127                platform_set_drvdata(pdev, hcd);
 128                device_wakeup_enable(hcd->self.controller);
 129                return ret;
 130        }
 131
 132err1:
 133        usb_put_hcd(hcd);
 134        return ret;
 135}
 136
 137static int ehci_hcd_sead3_drv_remove(struct platform_device *pdev)
 138{
 139        struct usb_hcd *hcd = platform_get_drvdata(pdev);
 140
 141        usb_remove_hcd(hcd);
 142        usb_put_hcd(hcd);
 143
 144        return 0;
 145}
 146
 147#ifdef CONFIG_PM
 148static int ehci_hcd_sead3_drv_suspend(struct device *dev)
 149{
 150        struct usb_hcd *hcd = dev_get_drvdata(dev);
 151        bool do_wakeup = device_may_wakeup(dev);
 152
 153        return ehci_suspend(hcd, do_wakeup);
 154}
 155
 156static int ehci_hcd_sead3_drv_resume(struct device *dev)
 157{
 158        struct usb_hcd *hcd = dev_get_drvdata(dev);
 159
 160        ehci_resume(hcd, false);
 161        return 0;
 162}
 163
 164static const struct dev_pm_ops sead3_ehci_pmops = {
 165        .suspend        = ehci_hcd_sead3_drv_suspend,
 166        .resume         = ehci_hcd_sead3_drv_resume,
 167};
 168
 169#define SEAD3_EHCI_PMOPS (&sead3_ehci_pmops)
 170
 171#else
 172#define SEAD3_EHCI_PMOPS NULL
 173#endif
 174
 175static struct platform_driver ehci_hcd_sead3_driver = {
 176        .probe          = ehci_hcd_sead3_drv_probe,
 177        .remove         = ehci_hcd_sead3_drv_remove,
 178        .shutdown       = usb_hcd_platform_shutdown,
 179        .driver = {
 180                .name   = "sead3-ehci",
 181                .owner  = THIS_MODULE,
 182                .pm     = SEAD3_EHCI_PMOPS,
 183        }
 184};
 185
 186MODULE_ALIAS("platform:sead3-ehci");
 187