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
  25 static 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
  49 const 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
  95 static 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->rsrc_start = res->start;
 114         hcd->rsrc_len = resource_size(res);
 115
 116         hcd->regs = devm_ioremap_resource(&pdev->dev, res);
 117         if (IS_ERR(hcd->regs)) {
 118                 ret = PTR_ERR(hcd->regs);
 119                 goto err1;
 120         }
 121
 122         /* Root hub has integrated TT. */
 123         hcd->has_tt = 1;
 124
 125         ret = usb_add_hcd(hcd, pdev->resource[1].start,
 126                           IRQF_SHARED);
 127         if (ret == 0) {
 128                 platform_set_drvdata(pdev, hcd);
 129                 return ret;
 130         }
 131
 132 err1:
 133         usb_put_hcd(hcd);
 134         return ret;
 135 }
 136
 137 static 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
 148 static 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
 156 static 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
 164 static 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
 175 static 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
 186 MODULE_ALIAS("platform:sead3-ehci");