git.oblomov.eu Git - linux-2.6/blob - drivers/usb/host/ohci-lh7a404.c

   1 /*
   2  * OHCI HCD (Host Controller Driver) for USB.
   3  *
   4  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   5  * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
   6  * (C) Copyright 2002 Hewlett-Packard Company
   7  *
   8  * Bus Glue for Sharp LH7A404
   9  *
  10  * Written by Christopher Hoover <ch@hpl.hp.com>
  11  * Based on fragments of previous driver by Rusell King et al.
  12  *
  13  * Modified for LH7A404 from ohci-sa1111.c
  14  *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
  15  *
  16  * This file is licenced under the GPL.
  17  */
  18
  19 #include <asm/hardware.h>
  20
  21
  22 extern int usb_disabled(void);
  23
  24 /*-------------------------------------------------------------------------*/
  25
  26 static void lh7a404_start_hc(struct platform_device *dev)
  27 {
  28         printk(KERN_DEBUG __FILE__
  29                ": starting LH7A404 OHCI USB Controller\n");
  30
  31         /*
  32          * Now, carefully enable the USB clock, and take
  33          * the USB host controller out of reset.
  34          */
  35         CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */
  36         udelay(1000);
  37         USBH_CMDSTATUS = OHCI_HCR;
  38
  39         printk(KERN_DEBUG __FILE__
  40                    ": Clock to USB host has been enabled \n");
  41 }
  42
  43 static void lh7a404_stop_hc(struct platform_device *dev)
  44 {
  45         printk(KERN_DEBUG __FILE__
  46                ": stopping LH7A404 OHCI USB Controller\n");
  47
  48         CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */
  49 }
  50
  51
  52 /*-------------------------------------------------------------------------*/
  53
  54 /* configure so an HC device and id are always provided */
  55 /* always called with process context; sleeping is OK */
  56
  57
  58 /**
  59  * usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs
  60  * Context: !in_interrupt()
  61  *
  62  * Allocates basic resources for this USB host controller, and
  63  * then invokes the start() method for the HCD associated with it
  64  * through the hotplug entry's driver_data.
  65  *
  66  */
  67 int usb_hcd_lh7a404_probe (const struct hc_driver *driver,
  68                           struct platform_device *dev)
  69 {
  70         int retval;
  71         struct usb_hcd *hcd;
  72
  73         if (dev->resource[1].flags != IORESOURCE_IRQ) {
  74                 pr_debug("resource[1] is not IORESOURCE_IRQ");
  75                 return -ENOMEM;
  76         }
  77
  78         hcd = usb_create_hcd(driver, &dev->dev, "lh7a404");
  79         if (!hcd)
  80                 return -ENOMEM;
  81         hcd->rsrc_start = dev->resource[0].start;
  82         hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
  83
  84         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  85                 pr_debug("request_mem_region failed");
  86                 retval = -EBUSY;
  87                 goto err1;
  88         }
  89
  90         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
  91         if (!hcd->regs) {
  92                 pr_debug("ioremap failed");
  93                 retval = -ENOMEM;
  94                 goto err2;
  95         }
  96
  97         lh7a404_start_hc(dev);
  98         ohci_hcd_init(hcd_to_ohci(hcd));
  99
 100         retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
 101         if (retval == 0)
 102                 return retval;
 103
 104         lh7a404_stop_hc(dev);
 105         iounmap(hcd->regs);
 106  err2:
 107         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 108  err1:
 109         usb_put_hcd(hcd);
 110         return retval;
 111 }
 112
 113
 114 /* may be called without controller electrically present */
 115 /* may be called with controller, bus, and devices active */
 116
 117 /**
 118  * usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs
 119  * @dev: USB Host Controller being removed
 120  * Context: !in_interrupt()
 121  *
 122  * Reverses the effect of usb_hcd_lh7a404_probe(), first invoking
 123  * the HCD's stop() method.  It is always called from a thread
 124  * context, normally "rmmod", "apmd", or something similar.
 125  *
 126  */
 127 void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev)
 128 {
 129         usb_remove_hcd(hcd);
 130         lh7a404_stop_hc(dev);
 131         iounmap(hcd->regs);
 132         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 133         usb_put_hcd(hcd);
 134 }
 135
 136 /*-------------------------------------------------------------------------*/
 137
 138 static int __devinit
 139 ohci_lh7a404_start (struct usb_hcd *hcd)
 140 {
 141         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
 142         int             ret;
 143
 144         ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci);
 145         if ((ret = ohci_init(ohci)) < 0)
 146                 return ret;
 147
 148         if ((ret = ohci_run (ohci)) < 0) {
 149                 err ("can't start %s", hcd->self.bus_name);
 150                 ohci_stop (hcd);
 151                 return ret;
 152         }
 153         return 0;
 154 }
 155
 156 /*-------------------------------------------------------------------------*/
 157
 158 static const struct hc_driver ohci_lh7a404_hc_driver = {
 159         .description =          hcd_name,
 160         .product_desc =         "LH7A404 OHCI",
 161         .hcd_priv_size =        sizeof(struct ohci_hcd),
 162
 163         /*
 164          * generic hardware linkage
 165          */
 166         .irq =                  ohci_irq,
 167         .flags =                HCD_USB11 | HCD_MEMORY,
 168
 169         /*
 170          * basic lifecycle operations
 171          */
 172         .start =                ohci_lh7a404_start,
 173 #ifdef  CONFIG_PM
 174         /* suspend:             ohci_lh7a404_suspend,  -- tbd */
 175         /* resume:              ohci_lh7a404_resume,   -- tbd */
 176 #endif /*CONFIG_PM*/
 177         .stop =                 ohci_stop,
 178
 179         /*
 180          * managing i/o requests and associated device resources
 181          */
 182         .urb_enqueue =          ohci_urb_enqueue,
 183         .urb_dequeue =          ohci_urb_dequeue,
 184         .endpoint_disable =     ohci_endpoint_disable,
 185
 186         /*
 187          * scheduling support
 188          */
 189         .get_frame_number =     ohci_get_frame,
 190
 191         /*
 192          * root hub support
 193          */
 194         .hub_status_data =      ohci_hub_status_data,
 195         .hub_control =          ohci_hub_control,
 196 };
 197
 198 /*-------------------------------------------------------------------------*/
 199
 200 static int ohci_hcd_lh7a404_drv_probe(struct device *dev)
 201 {
 202         struct platform_device *pdev = to_platform_device(dev);
 203         int ret;
 204
 205         pr_debug ("In ohci_hcd_lh7a404_drv_probe");
 206
 207         if (usb_disabled())
 208                 return -ENODEV;
 209
 210         ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev);
 211         return ret;
 212 }
 213
 214 static int ohci_hcd_lh7a404_drv_remove(struct device *dev)
 215 {
 216         struct platform_device *pdev = to_platform_device(dev);
 217         struct usb_hcd *hcd = dev_get_drvdata(dev);
 218
 219         usb_hcd_lh7a404_remove(hcd, pdev);
 220         return 0;
 221 }
 222         /*TBD*/
 223 /*static int ohci_hcd_lh7a404_drv_suspend(struct device *dev)
 224 {
 225         struct platform_device *pdev = to_platform_device(dev);
 226         struct usb_hcd *hcd = dev_get_drvdata(dev);
 227
 228         return 0;
 229 }
 230 static int ohci_hcd_lh7a404_drv_resume(struct device *dev)
 231 {
 232         struct platform_device *pdev = to_platform_device(dev);
 233         struct usb_hcd *hcd = dev_get_drvdata(dev);
 234
 235
 236         return 0;
 237 }
 238 */
 239
 240 static struct device_driver ohci_hcd_lh7a404_driver = {
 241         .name           = "lh7a404-ohci",
 242         .bus            = &platform_bus_type,
 243         .probe          = ohci_hcd_lh7a404_drv_probe,
 244         .remove         = ohci_hcd_lh7a404_drv_remove,
 245         /*.suspend      = ohci_hcd_lh7a404_drv_suspend, */
 246         /*.resume       = ohci_hcd_lh7a404_drv_resume, */
 247 };
 248
 249 static int __init ohci_hcd_lh7a404_init (void)
 250 {
 251         pr_debug (DRIVER_INFO " (LH7A404)");
 252         pr_debug ("block sizes: ed %d td %d\n",
 253                 sizeof (struct ed), sizeof (struct td));
 254
 255         return driver_register(&ohci_hcd_lh7a404_driver);
 256 }
 257
 258 static void __exit ohci_hcd_lh7a404_cleanup (void)
 259 {
 260         driver_unregister(&ohci_hcd_lh7a404_driver);
 261 }
 262
 263 module_init (ohci_hcd_lh7a404_init);
 264 module_exit (ohci_hcd_lh7a404_cleanup);