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         struct usb_ohci_pdata *pdata = dev->dev.platform_data;
  87         int irq;
  88         int err = -ENOMEM;
  89
  90         if (!pdata) {
  91                 WARN_ON(1);
  92                 return -ENODEV;
  93         }
  94
  95         if (usb_disabled())
  96                 return -ENODEV;
  97
  98         irq = platform_get_irq(dev, 0);
  99         if (irq < 0) {
 100                 pr_err("no irq provided");
 101                 return irq;
 102         }
 103
 104         res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 105         if (!res_mem) {
 106                 pr_err("no memory recourse provided");
 107                 return -ENXIO;
 108         }
 109
 110         if (pdata->power_on) {
 111                 err = pdata->power_on(dev);
 112                 if (err < 0)
 113                         return err;
 114         }
 115
 116         hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
 117                         dev_name(&dev->dev));
 118         if (!hcd) {
 119                 err = -ENOMEM;
 120                 goto err_power;
 121         }
 122
 123         hcd->rsrc_start = res_mem->start;
 124         hcd->rsrc_len = resource_size(res_mem);
 125
 126         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 127                 pr_err("controller already in use");
 128                 err = -EBUSY;
 129                 goto err_put_hcd;
 130         }
 131
 132         hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 133         if (!hcd->regs) {
 134                 err = -ENOMEM;
 135                 goto err_release_region;
 136         }
 137         err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 138         if (err)
 139                 goto err_iounmap;
 140
 141         platform_set_drvdata(dev, hcd);
 142
 143         return err;
 144
 145 err_iounmap:
 146         iounmap(hcd->regs);
 147 err_release_region:
 148         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 149 err_put_hcd:
 150         usb_put_hcd(hcd);
 151 err_power:
 152         if (pdata->power_off)
 153                 pdata->power_off(dev);
 154
 155         return err;
 156 }
 157
 158 static int __devexit ohci_platform_remove(struct platform_device *dev)
 159 {
 160         struct usb_hcd *hcd = platform_get_drvdata(dev);
 161         struct usb_ohci_pdata *pdata = dev->dev.platform_data;
 162
 163         usb_remove_hcd(hcd);
 164         iounmap(hcd->regs);
 165         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 166         usb_put_hcd(hcd);
 167         platform_set_drvdata(dev, NULL);
 168
 169         if (pdata->power_off)
 170                 pdata->power_off(dev);
 171
 172         return 0;
 173 }
 174
 175 #ifdef CONFIG_PM
 176
 177 static int ohci_platform_suspend(struct device *dev)
 178 {
 179         struct usb_ohci_pdata *pdata = dev->platform_data;
 180         struct platform_device *pdev =
 181                 container_of(dev, struct platform_device, dev);
 182
 183         if (pdata->power_suspend)
 184                 pdata->power_suspend(pdev);
 185
 186         return 0;
 187 }
 188
 189 static int ohci_platform_resume(struct device *dev)
 190 {
 191         struct usb_hcd *hcd = dev_get_drvdata(dev);
 192         struct usb_ohci_pdata *pdata = dev->platform_data;
 193         struct platform_device *pdev =
 194                 container_of(dev, struct platform_device, dev);
 195
 196         if (pdata->power_on) {
 197                 int err = pdata->power_on(pdev);
 198                 if (err < 0)
 199                         return err;
 200         }
 201
 202         ohci_finish_controller_resume(hcd);
 203         return 0;
 204 }
 205
 206 #else /* !CONFIG_PM */
 207 #define ohci_platform_suspend   NULL
 208 #define ohci_platform_resume    NULL
 209 #endif /* CONFIG_PM */
 210
 211 static const struct platform_device_id ohci_platform_table[] = {
 212         { "ohci-platform", 0 },
 213         { }
 214 };
 215 MODULE_DEVICE_TABLE(platform, ohci_platform_table);
 216
 217 static const struct dev_pm_ops ohci_platform_pm_ops = {
 218         .suspend        = ohci_platform_suspend,
 219         .resume         = ohci_platform_resume,
 220 };
 221
 222 static struct platform_driver ohci_platform_driver = {
 223         .id_table       = ohci_platform_table,
 224         .probe          = ohci_platform_probe,
 225         .remove         = __devexit_p(ohci_platform_remove),
 226         .shutdown       = usb_hcd_platform_shutdown,
 227         .driver         = {
 228                 .owner  = THIS_MODULE,
 229                 .name   = "ohci-platform",
 230                 .pm     = &ohci_platform_pm_ops,
 231         }
 232 };