target/linux/adm5120/files/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 Rusell 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, IRQF_DISABLED);
  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 /*-------------------------------------------------------------------------*/
 113
 114 static int __devinit
 115 admhc_adm5120_start(struct usb_hcd *hcd)
 116 {
 117         struct admhcd   *ahcd = hcd_to_admhcd (hcd);
 118         int             ret;
 119
 120         ret = admhc_init(ahcd);
 121         if (ret < 0) {
 122                 HCD_ERR("unable to init %s\n", hcd->self.bus_name);
 123                 goto err;
 124         }
 125
 126         ret = admhc_run(ahcd);
 127         if (ret < 0) {
 128                 HCD_ERR("unable to run %s\n", hcd->self.bus_name);
 129                 goto err_stop;
 130         }
 131
 132         return 0;
 133
 134 err_stop:
 135         admhc_stop(hcd);
 136 err:
 137         return ret;
 138 }
 139
 140 /*-------------------------------------------------------------------------*/
 141
 142 static const struct hc_driver adm5120_hc_driver = {
 143         .description =          hcd_name,
 144         .product_desc =         "ADM5120 built-in USB 1.1 Host Controller",
 145         .hcd_priv_size =        sizeof(struct admhcd),
 146
 147         /*
 148          * generic hardware linkage
 149          */
 150         .irq =                  admhc_irq,
 151         .flags =                HCD_USB11 | HCD_MEMORY,
 152
 153         /*
 154          * basic lifecycle operations
 155          */
 156         .start =                admhc_adm5120_start,
 157         .stop =                 admhc_stop,
 158         .shutdown =             admhc_shutdown,
 159
 160         /*
 161          * managing i/o requests and associated device resources
 162          */
 163         .urb_enqueue =          admhc_urb_enqueue,
 164         .urb_dequeue =          admhc_urb_dequeue,
 165         .endpoint_disable =     admhc_endpoint_disable,
 166
 167         /*
 168          * scheduling support
 169          */
 170         .get_frame_number =     admhc_get_frame_number,
 171
 172         /*
 173          * root hub support
 174          */
 175         .hub_status_data =      admhc_hub_status_data,
 176         .hub_control =          admhc_hub_control,
 177 #ifdef CONFIG_PM
 178         .bus_suspend =          admhc_bus_suspend,
 179         .bus_resume =           admhc_bus_resume,
 180 #endif
 181         .start_port_reset =     admhc_start_port_reset,
 182 };
 183
 184 /*-------------------------------------------------------------------------*/
 185
 186 static int usb_hcd_adm5120_probe(struct platform_device *pdev)
 187 {
 188         int ret;
 189
 190         ret = admhc_adm5120_probe(&adm5120_hc_driver, pdev);
 191
 192         return ret;
 193 }
 194
 195 static int usb_hcd_adm5120_remove(struct platform_device *pdev)
 196 {
 197         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 198
 199         admhc_adm5120_remove(hcd, pdev);
 200
 201         return 0;
 202 }
 203
 204 #ifdef CONFIG_PM
 205 /* TODO */
 206 static int usb_hcd_adm5120_suspend(struct platform_device *dev)
 207 {
 208         struct usb_hcd *hcd = platform_get_drvdata(dev);
 209
 210         return 0;
 211 }
 212
 213 static int usb_hcd_adm5120_resume(struct platform_device *dev)
 214 {
 215         struct usb_hcd *hcd = platform_get_drvdata(dev);
 216
 217         return 0;
 218 }
 219 #else
 220 #define usb_hcd_adm5120_suspend NULL
 221 #define usb_hcd_adm5120_resume  NULL
 222 #endif /* CONFIG_PM */
 223
 224 static struct platform_driver usb_hcd_adm5120_driver = {
 225         .probe          = usb_hcd_adm5120_probe,
 226         .remove         = usb_hcd_adm5120_remove,
 227         .shutdown       = usb_hcd_platform_shutdown,
 228         .suspend        = usb_hcd_adm5120_suspend,
 229         .resume         = usb_hcd_adm5120_resume,
 230         .driver         = {
 231                 .name   = "adm5120-hcd",
 232                 .owner  = THIS_MODULE,
 233         },
 234 };
 235