drivers/usb/host/ohci-platform.c

   1 /*
   2  * Generic platform ohci driver
   3  *
   4  * Copyright 2007 Michael Buesch <m@bues.ch>
   5  * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
   6  *
   7  * Derived from the OCHI-SSB driver
   8  * Derived from the OHCI-PCI driver
   9  * Copyright 1999 Roman Weissgaerber
  10  * Copyright 2000-2002 David Brownell
  11  * Copyright 1999 Linus Torvalds
  12  * Copyright 1999 Gregory P. Smith
  13  *
  14  * Licensed under the GNU/GPL. See COPYING for details.
  15  */
  16 #include <linux/platform_device.h>
  17 #include <linux/usb/ohci_pdriver.h>
  18
  19 static int ohci_platform_reset(struct usb_hcd *hcd)
  20 {
  21         struct platform_device *pdev = to_platform_device(hcd->self.controller);
  22         struct usb_ohci_pdata *pdata = pdev->dev.platform_data;
  23         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  24         int err;
  25
  26         if (pdata->big_endian_desc)
  27                 ohci->flags |= OHCI_QUIRK_BE_DESC;
  28         if (pdata->big_endian_mmio)
  29                 ohci->flags |= OHCI_QUIRK_BE_MMIO;
  30         if (pdata->no_big_frame_no)
  31                 ohci->flags |= OHCI_QUIRK_FRAME_NO;
  32
  33         ohci_hcd_init(ohci);
  34         err = ohci_init(ohci);
  35
  36         return err;
  37 }
  38
  39 static int ohci_platform_start(struct usb_hcd *hcd)
  40 {
  41         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  42         int err;
  43
  44         err = ohci_run(ohci);
  45         if (err < 0) {
  46                 ohci_err(ohci, "can't start\n");
  47                 ohci_stop(hcd);
  48         }
  49
  50         return err;
  51 }
  52
  53 static const struct hc_driver ohci_platform_hc_driver = {
  54         .description            = hcd_name,
  55         .product_desc           = "Generic Platform OHCI Controller",
  56         .hcd_priv_size          = sizeof(struct ohci_hcd),
  57
  58         .irq                    = ohci_irq,
  59         .flags                  = HCD_MEMORY | HCD_USB11,
  60
  61         .reset                  = ohci_platform_reset,
  62         .start                  = ohci_platform_start,
  63         .stop                   = ohci_stop,
  64         .shutdown               = ohci_shutdown,
  65
  66         .urb_enqueue            = ohci_urb_enqueue,
  67         .urb_dequeue            = ohci_urb_dequeue,
  68         .endpoint_disable       = ohci_endpoint_disable,
  69
  70         .get_frame_number       = ohci_get_frame,
  71
  72         .hub_status_data        = ohci_hub_status_data,
  73         .hub_control            = ohci_hub_control,
  74 #ifdef  CONFIG_PM
  75         .bus_suspend            = ohci_bus_suspend,
  76         .bus_resume             = ohci_bus_resume,
  77 #endif
  78
  79         .start_port_reset       = ohci_start_port_reset,
  80 };
  81
  82 static int __devinit ohci_platform_probe(struct platform_device *dev)
  83 {
  84         struct usb_hcd *hcd;
  85         struct resource *res_mem;
  86         int irq;
  87         int err = -ENOMEM;
  88
  89         BUG_ON(!dev->dev.platform_data);
  90
  91         if (usb_disabled())
  92                 return -ENODEV;
  93
  94         irq = platform_get_irq(dev, 0);
  95         if (irq < 0) {
  96                 pr_err("no irq provided");
  97                 return irq;
  98         }
  99
 100         res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 101         if (!res_mem) {
 102                 pr_err("no memory recourse provided");
 103                 return -ENXIO;
 104         }
 105
 106         hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
 107                         dev_name(&dev->dev));
 108         if (!hcd)
 109                 return -ENOMEM;
 110
 111         hcd->rsrc_start = res_mem->start;
 112         hcd->rsrc_len = resource_size(res_mem);
 113
 114         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 115                 pr_err("controller already in use");
 116                 err = -EBUSY;
 117                 goto err_put_hcd;
 118         }
 119
 120         hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 121         if (!hcd->regs)
 122                 goto err_release_region;
 123         err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 124         if (err)
 125                 goto err_iounmap;
 126
 127         platform_set_drvdata(dev, hcd);
 128
 129         return err;
 130
 131 err_iounmap:
 132         iounmap(hcd->regs);
 133 err_release_region:
 134         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 135 err_put_hcd:
 136         usb_put_hcd(hcd);
 137         return err;
 138 }
 139
 140 static int __devexit ohci_platform_remove(struct platform_device *dev)
 141 {
 142         struct usb_hcd *hcd = platform_get_drvdata(dev);
 143
 144         usb_remove_hcd(hcd);
 145         iounmap(hcd->regs);
 146         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 147         usb_put_hcd(hcd);
 148         platform_set_drvdata(dev, NULL);
 149
 150         return 0;
 151 }
 152
 153 #ifdef CONFIG_PM
 154
 155 static int ohci_platform_suspend(struct device *dev)
 156 {
 157         return 0;
 158 }
 159
 160 static int ohci_platform_resume(struct device *dev)
 161 {
 162         struct usb_hcd *hcd = dev_get_drvdata(dev);
 163
 164         ohci_finish_controller_resume(hcd);
 165         return 0;
 166 }
 167
 168 #else /* !CONFIG_PM */
 169 #define ohci_platform_suspend   NULL
 170 #define ohci_platform_resume    NULL
 171 #endif /* CONFIG_PM */
 172
 173 static const struct platform_device_id ohci_platform_table[] = {
 174         { "ohci-platform", 0 },
 175         { }
 176 };
 177 MODULE_DEVICE_TABLE(platform, ohci_platform_table);
 178
 179 static const struct dev_pm_ops ohci_platform_pm_ops = {
 180         .suspend        = ohci_platform_suspend,
 181         .resume         = ohci_platform_resume,
 182 };
 183
 184 static struct platform_driver ohci_platform_driver = {
 185         .id_table       = ohci_platform_table,
 186         .probe          = ohci_platform_probe,
 187         .remove         = __devexit_p(ohci_platform_remove),
 188         .shutdown       = usb_hcd_platform_shutdown,
 189         .driver         = {
 190                 .owner  = THIS_MODULE,
 191                 .name   = "ohci-platform",
 192                 .pm     = &ohci_platform_pm_ops,
 193         }
 194 };