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

   1 /*
   2  * ADM5120 HCD (Host Controller Driver) for USB
   3  *
   4  * Copyright (C) 2007 Gabor Juhos <juhosg at 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 file is licenced under the GPL.
  20  */
  21
  22 #include <linux/platform_device.h>
  23 #include <linux/signal.h>
  24
  25 #include <asm/bootinfo.h>
  26 #include <adm5120_defs.h>
  27
  28 #ifdef DEBUG
  29 #define HCD_DBG(f, a...)        printk(KERN_DEBUG "%s: " f, hcd_name, ## a)
  30 #else
  31 #define HCD_DBG(f, a...)        do {} while (0)
  32 #endif
  33 #define HCD_ERR(f, a...)        printk(KERN_ERR "%s: " f, hcd_name, ## a)
  34 #define HCD_INFO(f, a...)       printk(KERN_INFO "%s: " f, hcd_name, ## a)
  35
  36 /*-------------------------------------------------------------------------*/
  37
  38 static int admhc_adm5120_probe(const struct hc_driver *driver,
  39                   struct platform_device *dev)
  40 {
  41         int retval;
  42         struct usb_hcd *hcd;
  43         int irq;
  44         struct resource *regs;
  45
  46         /* sanity checks */
  47         regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
  48         if (!regs) {
  49                 HCD_DBG("no IOMEM resource found\n");
  50                 return -ENODEV;
  51         }
  52
  53         irq = platform_get_irq(dev, 0);
  54         if (irq < 0) {
  55                 HCD_DBG("no IRQ resource found\n");
  56                 return -ENODEV;
  57         }
  58
  59         hcd = usb_create_hcd(driver, &dev->dev, "ADM5120");
  60         if (!hcd)
  61                 return -ENOMEM;
  62
  63         hcd->rsrc_start = regs->start;
  64         hcd->rsrc_len = regs->end - regs->start + 1;
  65
  66         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  67                 HCD_DBG("request_mem_region failed\n");
  68                 retval = -EBUSY;
  69                 goto err_dev;
  70         }
  71
  72         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
  73         if (!hcd->regs) {
  74                 HCD_DBG("ioremap failed\n");
  75                 retval = -ENOMEM;
  76                 goto err_mem;
  77         }
  78
  79         admhc_hcd_init(hcd_to_admhcd(hcd));
  80
  81         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
  82         if (retval)
  83                 goto err_io;
  84
  85         return 0;
  86
  87 err_io:
  88         iounmap(hcd->regs);
  89 err_mem:
  90         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
  91 err_dev:
  92         usb_put_hcd(hcd);
  93         return retval;
  94 }
  95
  96
  97 /* may be called without controller electrically present */
  98 /* may be called with controller, bus, and devices active */
  99
 100 static void admhc_adm5120_remove(struct usb_hcd *hcd,
 101                 struct platform_device *dev)
 102 {
 103         usb_remove_hcd(hcd);
 104         iounmap(hcd->regs);
 105         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 106         usb_put_hcd(hcd);
 107 }
 108
 109 /*-------------------------------------------------------------------------*/
 110
 111 static int __devinit
 112 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 /*-------------------------------------------------------------------------*/
 138
 139 static const struct hc_driver adm5120_hc_driver = {
 140         .description =          hcd_name,
 141         .product_desc =         "ADM5120 built-in USB 1.1 Host Controller",
 142         .hcd_priv_size =        sizeof(struct admhcd),
 143
 144         /*
 145          * generic hardware linkage
 146          */
 147         .irq =                  admhc_irq,
 148         .flags =                HCD_USB11 | HCD_MEMORY,
 149
 150         /*
 151          * basic lifecycle operations
 152          */
 153         .start =                admhc_adm5120_start,
 154         .stop =                 admhc_stop,
 155         .shutdown =             admhc_shutdown,
 156
 157         /*
 158          * managing i/o requests and associated device resources
 159          */
 160         .urb_enqueue =          admhc_urb_enqueue,
 161         .urb_dequeue =          admhc_urb_dequeue,
 162         .endpoint_disable =     admhc_endpoint_disable,
 163
 164         /*
 165          * scheduling support
 166          */
 167         .get_frame_number =     admhc_get_frame_number,
 168
 169         /*
 170          * root hub support
 171          */
 172         .hub_status_data =      admhc_hub_status_data,
 173         .hub_control =          admhc_hub_control,
 174         .hub_irq_enable =       admhc_hub_irq_enable,
 175 #ifdef CONFIG_PM
 176         .bus_suspend =          admhc_bus_suspend,
 177         .bus_resume =           admhc_bus_resume,
 178 #endif
 179         .start_port_reset =     admhc_start_port_reset,
 180 };
 181
 182 /*-------------------------------------------------------------------------*/
 183
 184 static int usb_hcd_adm5120_probe(struct platform_device *pdev)
 185 {
 186         int ret;
 187
 188         if (mips_machgroup != MACH_GROUP_ADM5120)
 189                 return -ENODEV;
 190
 191         ret = admhc_adm5120_probe(&adm5120_hc_driver, pdev);
 192
 193         return ret;
 194 }
 195
 196 static int usb_hcd_adm5120_remove(struct platform_device *pdev)
 197 {
 198         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 199
 200         admhc_adm5120_remove(hcd, pdev);
 201
 202         return 0;
 203 }
 204
 205 #ifdef CONFIG_PM
 206 /* TODO */
 207 static int usb_hcd_adm5120_suspend(struct platform_device *dev)
 208 {
 209         struct usb_hcd *hcd = platform_get_drvdata(dev);
 210
 211         return 0;
 212 }
 213
 214 static int usb_hcd_adm5120_resume(struct platform_device *dev)
 215 {
 216         struct usb_hcd *hcd = platform_get_drvdata(dev);
 217
 218         return 0;
 219 }
 220 #else
 221 #define usb_hcd_adm5120_suspend NULL
 222 #define usb_hcd_adm5120_resume  NULL
 223 #endif /* CONFIG_PM */
 224
 225 static struct platform_driver usb_hcd_adm5120_driver = {
 226         .probe          = usb_hcd_adm5120_probe,
 227         .remove         = usb_hcd_adm5120_remove,
 228         .shutdown       = usb_hcd_platform_shutdown,
 229         .suspend        = usb_hcd_adm5120_suspend,
 230         .resume         = usb_hcd_adm5120_resume,
 231         .driver         = {
 232                 .name   = "adm5120-hcd",
 233                 .owner  = THIS_MODULE,
 234         },
 235 };
 236