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
  35         if (pdata->num_ports)
  36                 ohci->num_ports = pdata->num_ports;
  37
  38         err = ohci_init(ohci);
  39
  40         return err;
  41 }
  42
  43 static int ohci_platform_start(struct usb_hcd *hcd)
  44 {
  45         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  46         int err;
  47
  48         err = ohci_run(ohci);
  49         if (err < 0) {
  50                 ohci_err(ohci, "can't start\n");
  51                 ohci_stop(hcd);
  52         }
  53
  54         return err;
  55 }
  56
  57 static const struct hc_driver ohci_platform_hc_driver = {
  58         .description            = hcd_name,
  59         .product_desc           = "Generic Platform OHCI Controller",
  60         .hcd_priv_size          = sizeof(struct ohci_hcd),
  61
  62         .irq                    = ohci_irq,
  63         .flags                  = HCD_MEMORY | HCD_USB11,
  64
  65         .reset                  = ohci_platform_reset,
  66         .start                  = ohci_platform_start,
  67         .stop                   = ohci_stop,
  68         .shutdown               = ohci_shutdown,
  69
  70         .urb_enqueue            = ohci_urb_enqueue,
  71         .urb_dequeue            = ohci_urb_dequeue,
  72         .endpoint_disable       = ohci_endpoint_disable,
  73
  74         .get_frame_number       = ohci_get_frame,
  75
  76         .hub_status_data        = ohci_hub_status_data,
  77         .hub_control            = ohci_hub_control,
  78 #ifdef  CONFIG_PM
  79         .bus_suspend            = ohci_bus_suspend,
  80         .bus_resume             = ohci_bus_resume,
  81 #endif
  82
  83         .start_port_reset       = ohci_start_port_reset,
  84 };
  85
  86 static int ohci_platform_probe(struct platform_device *dev)
  87 {
  88         struct usb_hcd *hcd;
  89         struct resource *res_mem;
  90         struct usb_ohci_pdata *pdata = dev->dev.platform_data;
  91         int irq;
  92         int err = -ENOMEM;
  93
  94         if (!pdata) {
  95                 WARN_ON(1);
  96                 return -ENODEV;
  97         }
  98
  99         if (usb_disabled())
 100                 return -ENODEV;
 101
 102         irq = platform_get_irq(dev, 0);
 103         if (irq < 0) {
 104                 dev_err(&dev->dev, "no irq provided");
 105                 return irq;
 106         }
 107
 108         res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 109         if (!res_mem) {
 110                 dev_err(&dev->dev, "no memory resource provided");
 111                 return -ENXIO;
 112         }
 113
 114         if (pdata->power_on) {
 115                 err = pdata->power_on(dev);
 116                 if (err < 0)
 117                         return err;
 118         }
 119
 120         hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
 121                         dev_name(&dev->dev));
 122         if (!hcd) {
 123                 err = -ENOMEM;
 124                 goto err_power;
 125         }
 126
 127         hcd->rsrc_start = res_mem->start;
 128         hcd->rsrc_len = resource_size(res_mem);
 129
 130         hcd->regs = devm_request_and_ioremap(&dev->dev, res_mem);
 131         if (!hcd->regs) {
 132                 err = -ENOMEM;
 133                 goto err_put_hcd;
 134         }
 135         err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 136         if (err)
 137                 goto err_put_hcd;
 138
 139         platform_set_drvdata(dev, hcd);
 140
 141         return err;
 142
 143 err_put_hcd:
 144         usb_put_hcd(hcd);
 145 err_power:
 146         if (pdata->power_off)
 147                 pdata->power_off(dev);
 148
 149         return err;
 150 }
 151
 152 static int ohci_platform_remove(struct platform_device *dev)
 153 {
 154         struct usb_hcd *hcd = platform_get_drvdata(dev);
 155         struct usb_ohci_pdata *pdata = dev->dev.platform_data;
 156
 157         usb_remove_hcd(hcd);
 158         usb_put_hcd(hcd);
 159         platform_set_drvdata(dev, NULL);
 160
 161         if (pdata->power_off)
 162                 pdata->power_off(dev);
 163
 164         return 0;
 165 }
 166
 167 #ifdef CONFIG_PM
 168
 169 static int ohci_platform_suspend(struct device *dev)
 170 {
 171         struct usb_ohci_pdata *pdata = dev->platform_data;
 172         struct platform_device *pdev =
 173                 container_of(dev, struct platform_device, dev);
 174
 175         if (pdata->power_suspend)
 176                 pdata->power_suspend(pdev);
 177
 178         return 0;
 179 }
 180
 181 static int ohci_platform_resume(struct device *dev)
 182 {
 183         struct usb_hcd *hcd = dev_get_drvdata(dev);
 184         struct usb_ohci_pdata *pdata = dev->platform_data;
 185         struct platform_device *pdev =
 186                 container_of(dev, struct platform_device, dev);
 187
 188         if (pdata->power_on) {
 189                 int err = pdata->power_on(pdev);
 190                 if (err < 0)
 191                         return err;
 192         }
 193
 194         ohci_resume(hcd, false);
 195         return 0;
 196 }
 197
 198 #else /* !CONFIG_PM */
 199 #define ohci_platform_suspend   NULL
 200 #define ohci_platform_resume    NULL
 201 #endif /* CONFIG_PM */
 202
 203 static const struct platform_device_id ohci_platform_table[] = {
 204         { "ohci-platform", 0 },
 205         { }
 206 };
 207 MODULE_DEVICE_TABLE(platform, ohci_platform_table);
 208
 209 static const struct dev_pm_ops ohci_platform_pm_ops = {
 210         .suspend        = ohci_platform_suspend,
 211         .resume         = ohci_platform_resume,
 212 };
 213
 214 static struct platform_driver ohci_platform_driver = {
 215         .id_table       = ohci_platform_table,
 216         .probe          = ohci_platform_probe,
 217         .remove         = ohci_platform_remove,
 218         .shutdown       = usb_hcd_platform_shutdown,
 219         .driver         = {
 220                 .owner  = THIS_MODULE,
 221                 .name   = "ohci-platform",
 222                 .pm     = &ohci_platform_pm_ops,
 223         }
 224 };