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
  17 #include <linux/hrtimer.h>
  18 #include <linux/io.h>
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/err.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/usb/ohci_pdriver.h>
  24 #include <linux/usb.h>
  25 #include <linux/usb/hcd.h>
  26
  27 #include "ohci.h"
  28
  29 #define DRIVER_DESC "OHCI generic platform driver"
  30
  31 static const char hcd_name[] = "ohci-platform";
  32
  33 static int ohci_platform_reset(struct usb_hcd *hcd)
  34 {
  35         struct platform_device *pdev = to_platform_device(hcd->self.controller);
  36         struct usb_ohci_pdata *pdata = dev_get_platdata(&pdev->dev);
  37         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  38
  39         if (pdata->big_endian_desc)
  40                 ohci->flags |= OHCI_QUIRK_BE_DESC;
  41         if (pdata->big_endian_mmio)
  42                 ohci->flags |= OHCI_QUIRK_BE_MMIO;
  43         if (pdata->no_big_frame_no)
  44                 ohci->flags |= OHCI_QUIRK_FRAME_NO;
  45         if (pdata->num_ports)
  46                 ohci->num_ports = pdata->num_ports;
  47
  48         return ohci_setup(hcd);
  49 }
  50
  51 static struct hc_driver __read_mostly ohci_platform_hc_driver;
  52
  53 static const struct ohci_driver_overrides platform_overrides __initconst = {
  54         .product_desc = "Generic Platform OHCI controller",
  55         .reset =        ohci_platform_reset,
  56 };
  57
  58 static int ohci_platform_probe(struct platform_device *dev)
  59 {
  60         struct usb_hcd *hcd;
  61         struct resource *res_mem;
  62         struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
  63         int irq;
  64         int err = -ENOMEM;
  65
  66         if (!pdata) {
  67                 WARN_ON(1);
  68                 return -ENODEV;
  69         }
  70
  71         if (usb_disabled())
  72                 return -ENODEV;
  73
  74         irq = platform_get_irq(dev, 0);
  75         if (irq < 0) {
  76                 dev_err(&dev->dev, "no irq provided");
  77                 return irq;
  78         }
  79
  80         res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
  81         if (!res_mem) {
  82                 dev_err(&dev->dev, "no memory resource provided");
  83                 return -ENXIO;
  84         }
  85
  86         if (pdata->power_on) {
  87                 err = pdata->power_on(dev);
  88                 if (err < 0)
  89                         return err;
  90         }
  91
  92         hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
  93                         dev_name(&dev->dev));
  94         if (!hcd) {
  95                 err = -ENOMEM;
  96                 goto err_power;
  97         }
  98
  99         hcd->rsrc_start = res_mem->start;
 100         hcd->rsrc_len = resource_size(res_mem);
 101
 102         hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
 103         if (IS_ERR(hcd->regs)) {
 104                 err = PTR_ERR(hcd->regs);
 105                 goto err_put_hcd;
 106         }
 107         err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 108         if (err)
 109                 goto err_put_hcd;
 110
 111         device_wakeup_enable(hcd->self.controller);
 112
 113         platform_set_drvdata(dev, hcd);
 114
 115         return err;
 116
 117 err_put_hcd:
 118         usb_put_hcd(hcd);
 119 err_power:
 120         if (pdata->power_off)
 121                 pdata->power_off(dev);
 122
 123         return err;
 124 }
 125
 126 static int ohci_platform_remove(struct platform_device *dev)
 127 {
 128         struct usb_hcd *hcd = platform_get_drvdata(dev);
 129         struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
 130
 131         usb_remove_hcd(hcd);
 132         usb_put_hcd(hcd);
 133
 134         if (pdata->power_off)
 135                 pdata->power_off(dev);
 136
 137         return 0;
 138 }
 139
 140 #ifdef CONFIG_PM
 141
 142 static int ohci_platform_suspend(struct device *dev)
 143 {
 144         struct usb_hcd *hcd = dev_get_drvdata(dev);
 145         struct usb_ohci_pdata *pdata = dev->platform_data;
 146         struct platform_device *pdev =
 147                 container_of(dev, struct platform_device, dev);
 148         bool do_wakeup = device_may_wakeup(dev);
 149         int ret;
 150
 151         ret = ohci_suspend(hcd, do_wakeup);
 152         if (ret)
 153                 return ret;
 154
 155         if (pdata->power_suspend)
 156                 pdata->power_suspend(pdev);
 157
 158         return ret;
 159 }
 160
 161 static int ohci_platform_resume(struct device *dev)
 162 {
 163         struct usb_hcd *hcd = dev_get_drvdata(dev);
 164         struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
 165         struct platform_device *pdev =
 166                 container_of(dev, struct platform_device, dev);
 167
 168         if (pdata->power_on) {
 169                 int err = pdata->power_on(pdev);
 170                 if (err < 0)
 171                         return err;
 172         }
 173
 174         ohci_resume(hcd, false);
 175         return 0;
 176 }
 177
 178 #else /* !CONFIG_PM */
 179 #define ohci_platform_suspend   NULL
 180 #define ohci_platform_resume    NULL
 181 #endif /* CONFIG_PM */
 182
 183 static const struct platform_device_id ohci_platform_table[] = {
 184         { "ohci-platform", 0 },
 185         { }
 186 };
 187 MODULE_DEVICE_TABLE(platform, ohci_platform_table);
 188
 189 static const struct dev_pm_ops ohci_platform_pm_ops = {
 190         .suspend        = ohci_platform_suspend,
 191         .resume         = ohci_platform_resume,
 192 };
 193
 194 static struct platform_driver ohci_platform_driver = {
 195         .id_table       = ohci_platform_table,
 196         .probe          = ohci_platform_probe,
 197         .remove         = ohci_platform_remove,
 198         .shutdown       = usb_hcd_platform_shutdown,
 199         .driver         = {
 200                 .owner  = THIS_MODULE,
 201                 .name   = "ohci-platform",
 202                 .pm     = &ohci_platform_pm_ops,
 203         }
 204 };
 205
 206 static int __init ohci_platform_init(void)
 207 {
 208         if (usb_disabled())
 209                 return -ENODEV;
 210
 211         pr_info("%s: " DRIVER_DESC "\n", hcd_name);
 212
 213         ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
 214         return platform_driver_register(&ohci_platform_driver);
 215 }
 216 module_init(ohci_platform_init);
 217
 218 static void __exit ohci_platform_cleanup(void)
 219 {
 220         platform_driver_unregister(&ohci_platform_driver);
 221 }
 222 module_exit(ohci_platform_cleanup);
 223
 224 MODULE_DESCRIPTION(DRIVER_DESC);
 225 MODULE_AUTHOR("Hauke Mehrtens");
 226 MODULE_AUTHOR("Alan Stern");
 227 MODULE_LICENSE("GPL");