target/linux/adm5120/files/drivers/usb/host/adm5120-drv.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 AMD Alchemy Au1xxx
   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 ahcd-sa1111.c
  14  *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
  15  * Modified for AMD Alchemy Au1xxx
  16  *  by Matt Porter <mporter@kernel.crashing.org>
  17  *
  18  * This file is licenced under the GPL.
  19  */
  20
  21 #include <linux/platform_device.h>
  22 #include <linux/signal.h>
  23
  24 #include <asm/bootinfo.h>
  25 #include <asm/mach-adm5120/adm5120_defs.h>
  26
  27 #ifdef DEBUG
  28 #define HCD_DBG(f, a...)        printk(KERN_DEBUG "%s: " f, hcd_name, ## a)
  29 #else
  30 #define HCD_DBG(f, a...)        do {} while (0)
  31 #endif
  32 #define HCD_ERR(f, a...)        printk(KERN_ERR "%s: " f, hcd_name, ## a)
  33 #define HCD_INFO(f, a...)       printk(KERN_INFO "%s: " f, hcd_name, ## a)
  34
  35 /*-------------------------------------------------------------------------*/
  36
  37 static int admhc_adm5120_probe(const struct hc_driver *driver,
  38                   struct platform_device *dev)
  39 {
  40         int retval;
  41         struct usb_hcd *hcd;
  42         int irq;
  43         struct resource *regs;
  44
  45         /* sanity checks */
  46         regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
  47         if (!regs) {
  48                 HCD_DBG("no IOMEM resource found\n");
  49                 return -ENODEV;
  50         }
  51
  52         irq = platform_get_irq(dev, 0);
  53         if (irq < 0) {
  54                 HCD_DBG("no IRQ resource found\n");
  55                 return -ENODEV;
  56         }
  57
  58         hcd = usb_create_hcd(driver, &dev->dev, "ADM5120");
  59         if (!hcd)
  60                 return -ENOMEM;
  61
  62         hcd->rsrc_start = regs->start;
  63         hcd->rsrc_len = regs->end - regs->start + 1;
  64
  65         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  66                 HCD_DBG("request_mem_region failed\n");
  67                 retval = -EBUSY;
  68                 goto err_dev;
  69         }
  70
  71         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
  72         if (!hcd->regs) {
  73                 HCD_DBG("ioremap failed\n");
  74                 retval = -ENOMEM;
  75                 goto err_mem;
  76         }
  77
  78         admhc_hcd_init(hcd_to_admhcd(hcd));
  79
  80         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
  81         if (retval)
  82                 goto err_io;
  83
  84         return 0;
  85
  86 err_io:
  87         iounmap(hcd->regs);
  88 err_mem:
  89         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
  90 err_dev:
  91         usb_put_hcd(hcd);
  92         return retval;
  93 }
  94
  95
  96 /* may be called without controller electrically present */
  97 /* may be called with controller, bus, and devices active */
  98
  99 static void admhc_adm5120_remove(struct usb_hcd *hcd,
 100                 struct platform_device *dev)
 101 {
 102         usb_remove_hcd(hcd);
 103         iounmap(hcd->regs);
 104         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 105         usb_put_hcd(hcd);
 106 }
 107
 108 /*-------------------------------------------------------------------------*/
 109
 110 static int __devinit
 111 admhc_adm5120_start(struct usb_hcd *hcd)
 112 {
 113         struct admhcd   *ahcd = hcd_to_admhcd (hcd);
 114         int             ret;
 115
 116         ret = admhc_init(ahcd);
 117         if (ret < 0) {
 118                 HCD_ERR("unable to init %s\n", hcd->self.bus_name);
 119                 goto err;
 120         }
 121
 122         ret = admhc_run(ahcd);
 123         if (ret < 0) {
 124                 HCD_ERR("unable to run %s\n", hcd->self.bus_name);
 125                 goto err_stop;
 126         }
 127
 128         return 0;
 129
 130 err_stop:
 131         admhc_stop(hcd);
 132 err:
 133         return ret;
 134 }
 135
 136 /*-------------------------------------------------------------------------*/
 137
 138 static const struct hc_driver adm5120_hc_driver = {
 139         .description =          hcd_name,
 140         .product_desc =         "ADM5120 built-in USB 1.1 Host Controller",
 141         .hcd_priv_size =        sizeof(struct admhcd),
 142
 143         /*
 144          * generic hardware linkage
 145          */
 146         .irq =                  admhc_irq,
 147         .flags =                HCD_USB11 | HCD_MEMORY,
 148
 149         /*
 150          * basic lifecycle operations
 151          */
 152         .start =                admhc_adm5120_start,
 153         .stop =                 admhc_stop,
 154         .shutdown =             admhc_shutdown,
 155
 156         /*
 157          * managing i/o requests and associated device resources
 158          */
 159         .urb_enqueue =          admhc_urb_enqueue,
 160         .urb_dequeue =          admhc_urb_dequeue,
 161         .endpoint_disable =     admhc_endpoint_disable,
 162
 163         /*
 164          * scheduling support
 165          */
 166         .get_frame_number =     admhc_get_frame,
 167
 168         /*
 169          * root hub support
 170          */
 171         .hub_status_data =      admhc_hub_status_data,
 172         .hub_control =          admhc_hub_control,
 173         .hub_irq_enable =       admhc_rhsc_enable,
 174 #ifdef  CONFIG_PM
 175         .bus_suspend =          admhc_bus_suspend,
 176         .bus_resume =           admhc_bus_resume,
 177 #endif
 178         .start_port_reset =     admhc_start_port_reset,
 179 };
 180
 181 /*-------------------------------------------------------------------------*/
 182
 183 static int usb_hcd_adm5120_probe(struct platform_device *pdev)
 184 {
 185         int ret;
 186
 187         if (mips_machgroup != MACH_GROUP_ADM5120)
 188                 return -ENODEV;
 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 #if 0
 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 #endif
 220
 221 static struct platform_driver usb_hcd_adm5120_driver = {
 222         .probe          = usb_hcd_adm5120_probe,
 223         .remove         = usb_hcd_adm5120_remove,
 224         .shutdown       = usb_hcd_platform_shutdown,
 225 #if 0
 226         /* TODO */
 227         .suspend        = usb_hcd_adm5120_suspend,
 228         .resume         = usb_hcd_adm5120_resume,
 229 #endif
 230         .driver         = {
 231                 .name   = "adm5120-hcd",
 232                 .owner  = THIS_MODULE,
 233         },
 234 };
 235