target/linux/adm5120/files-3.8/drivers/usb/host/adm5120-drv.c

   1 /*
   2  * ADM5120 HCD (Host Controller Driver) for USB
   3  *
   4  * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  * This file was derived from: drivers/usb/host/ohci-au1xxx.c
   7  *   (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   8  *   (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
   9  *   (C) Copyright 2002 Hewlett-Packard Company
  10  *
  11  *   Written by Christopher Hoover <ch@hpl.hp.com>
  12  *   Based on fragments of previous driver by Russell King et al.
  13  *
  14  *   Modified for LH7A404 from ahcd-sa1111.c
  15  *    by Durgesh Pattamatta <pattamattad@sharpsec.com>
  16  *   Modified for AMD Alchemy Au1xxx
  17  *    by Matt Porter <mporter@kernel.crashing.org>
  18  *
  19  *  This program is free software; you can redistribute it and/or modify it
  20  *  under the terms of the GNU General Public License version 2 as published
  21  *  by the Free Software Foundation.
  22  *
  23  */
  24
  25 #include <linux/platform_device.h>
  26 #include <linux/signal.h>
  27
  28 #include <asm/bootinfo.h>
  29 #include <asm/mach-adm5120/adm5120_defs.h>
  30
  31 #ifdef DEBUG
  32 #define HCD_DBG(f, a...)        printk(KERN_DEBUG "%s: " f, hcd_name, ## a)
  33 #else
  34 #define HCD_DBG(f, a...)        do {} while (0)
  35 #endif
  36 #define HCD_ERR(f, a...)        printk(KERN_ERR "%s: " f, hcd_name, ## a)
  37 #define HCD_INFO(f, a...)       printk(KERN_INFO "%s: " f, hcd_name, ## a)
  38
  39 /*-------------------------------------------------------------------------*/
  40
  41 static int admhc_adm5120_probe(const struct hc_driver *driver,
  42                   struct platform_device *dev)
  43 {
  44         int retval;
  45         struct usb_hcd *hcd;
  46         int irq;
  47         struct resource *regs;
  48
  49         /* sanity checks */
  50         regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
  51         if (!regs) {
  52                 HCD_DBG("no IOMEM resource found\n");
  53                 return -ENODEV;
  54         }
  55
  56         irq = platform_get_irq(dev, 0);
  57         if (irq < 0) {
  58                 HCD_DBG("no IRQ resource found\n");
  59                 return -ENODEV;
  60         }
  61
  62         hcd = usb_create_hcd(driver, &dev->dev, "ADM5120");
  63         if (!hcd)
  64                 return -ENOMEM;
  65
  66         hcd->rsrc_start = regs->start;
  67         hcd->rsrc_len = regs->end - regs->start + 1;
  68
  69         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  70                 HCD_DBG("request_mem_region failed\n");
  71                 retval = -EBUSY;
  72                 goto err_dev;
  73         }
  74
  75         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
  76         if (!hcd->regs) {
  77                 HCD_DBG("ioremap failed\n");
  78                 retval = -ENOMEM;
  79                 goto err_mem;
  80         }
  81
  82         admhc_hcd_init(hcd_to_admhcd(hcd));
  83
  84         retval = usb_add_hcd(hcd, irq, 0);
  85         if (retval)
  86                 goto err_io;
  87
  88         return 0;
  89
  90 err_io:
  91         iounmap(hcd->regs);
  92 err_mem:
  93         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
  94 err_dev:
  95         usb_put_hcd(hcd);
  96         return retval;
  97 }
  98
  99
 100 /* may be called without controller electrically present */
 101 /* may be called with controller, bus, and devices active */
 102
 103 static void admhc_adm5120_remove(struct usb_hcd *hcd,
 104                 struct platform_device *dev)
 105 {
 106         usb_remove_hcd(hcd);
 107         iounmap(hcd->regs);
 108         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 109         usb_put_hcd(hcd);
 110 }
 111
 112 static int admhc_adm5120_start(struct usb_hcd *hcd)
 113 {
 114         struct admhcd   *ahcd = hcd_to_admhcd(hcd);
 115         int             ret;
 116
 117         ret = admhc_init(ahcd);
 118         if (ret < 0) {
 119                 HCD_ERR("unable to init %s\n", hcd->self.bus_name);
 120                 goto err;
 121         }
 122
 123         ret = admhc_run(ahcd);
 124         if (ret < 0) {
 125                 HCD_ERR("unable to run %s\n", hcd->self.bus_name);
 126                 goto err_stop;
 127         }
 128
 129         return 0;
 130
 131 err_stop:
 132         admhc_stop(hcd);
 133 err:
 134         return ret;
 135 }
 136
 137 static const struct hc_driver adm5120_hc_driver = {
 138         .description =          hcd_name,
 139         .product_desc =         "ADM5120 built-in USB 1.1 Host Controller",
 140         .hcd_priv_size =        sizeof(struct admhcd),
 141
 142         /*
 143          * generic hardware linkage
 144          */
 145         .irq =                  admhc_irq,
 146         .flags =                HCD_USB11 | HCD_MEMORY,
 147
 148         /*
 149          * basic lifecycle operations
 150          */
 151         .start =                admhc_adm5120_start,
 152         .stop =                 admhc_stop,
 153         .shutdown =             admhc_shutdown,
 154
 155         /*
 156          * managing i/o requests and associated device resources
 157          */
 158         .urb_enqueue =          admhc_urb_enqueue,
 159         .urb_dequeue =          admhc_urb_dequeue,
 160         .endpoint_disable =     admhc_endpoint_disable,
 161
 162         /*
 163          * scheduling support
 164          */
 165         .get_frame_number =     admhc_get_frame_number,
 166
 167         /*
 168          * root hub support
 169          */
 170         .hub_status_data =      admhc_hub_status_data,
 171         .hub_control =          admhc_hub_control,
 172 #ifdef CONFIG_PM
 173         .bus_suspend =          admhc_bus_suspend,
 174         .bus_resume =           admhc_bus_resume,
 175 #endif
 176         .start_port_reset =     admhc_start_port_reset,
 177 };
 178
 179 static int usb_hcd_adm5120_probe(struct platform_device *pdev)
 180 {
 181         int ret;
 182
 183         ret = admhc_adm5120_probe(&adm5120_hc_driver, pdev);
 184
 185         return ret;
 186 }
 187
 188 static int usb_hcd_adm5120_remove(struct platform_device *pdev)
 189 {
 190         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 191
 192         admhc_adm5120_remove(hcd, pdev);
 193
 194         return 0;
 195 }
 196
 197 #ifdef CONFIG_PM
 198 /* TODO */
 199 static int usb_hcd_adm5120_suspend(struct platform_device *dev)
 200 {
 201         struct usb_hcd *hcd = platform_get_drvdata(dev);
 202
 203         return 0;
 204 }
 205
 206 static int usb_hcd_adm5120_resume(struct platform_device *dev)
 207 {
 208         struct usb_hcd *hcd = platform_get_drvdata(dev);
 209
 210         return 0;
 211 }
 212 #else
 213 #define usb_hcd_adm5120_suspend NULL
 214 #define usb_hcd_adm5120_resume  NULL
 215 #endif /* CONFIG_PM */
 216
 217 static struct platform_driver usb_hcd_adm5120_driver = {
 218         .probe          = usb_hcd_adm5120_probe,
 219         .remove         = usb_hcd_adm5120_remove,
 220         .shutdown       = usb_hcd_platform_shutdown,
 221         .suspend        = usb_hcd_adm5120_suspend,
 222         .resume         = usb_hcd_adm5120_resume,
 223         .driver         = {
 224                 .name   = "adm5120-hcd",
 225                 .owner  = THIS_MODULE,
 226         },
 227 };
 228