drivers/usb/host/ohci-ppc-soc.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  * (C) Copyright 2003-2005 MontaVista Software Inc.
   8  *
   9  * Bus Glue for PPC On-Chip OHCI driver
  10  * Tested on Freescale MPC5200 and IBM STB04xxx
  11  *
  12  * Modified by Dale Farnsworth <dale@farnsworth.org> from ohci-sa1111.c
  13  *
  14  * This file is licenced under the GPL.
  15  */
  16
  17 #include <asm/usb.h>
  18
  19 /* configure so an HC device and id are always provided */
  20 /* always called with process context; sleeping is OK */
  21
  22 /**
  23  * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs
  24  * Context: !in_interrupt()
  25  *
  26  * Allocates basic resources for this USB host controller, and
  27  * then invokes the start() method for the HCD associated with it
  28  * through the hotplug entry's driver_data.
  29  *
  30  * Store this function in the HCD's struct pci_driver as probe().
  31  */
  32 static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver,
  33                           struct platform_device *pdev)
  34 {
  35         int retval;
  36         struct usb_hcd *hcd;
  37         struct ohci_hcd *ohci;
  38         struct resource *res;
  39         int irq;
  40         struct usb_hcd_platform_data *pd = pdev->dev.platform_data;
  41
  42         pr_debug("initializing PPC-SOC USB Controller\n");
  43
  44         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  45         if (!res) {
  46                 pr_debug(__FILE__ ": no irq\n");
  47                 return -ENODEV;
  48         }
  49         irq = res->start;
  50
  51         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  52         if (!res) {
  53                 pr_debug(__FILE__ ": no reg addr\n");
  54                 return -ENODEV;
  55         }
  56
  57         hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB");
  58         if (!hcd)
  59                 return -ENOMEM;
  60         hcd->rsrc_start = res->start;
  61         hcd->rsrc_len = res->end - res->start + 1;
  62
  63         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  64                 pr_debug(__FILE__ ": request_mem_region failed\n");
  65                 retval = -EBUSY;
  66                 goto err1;
  67         }
  68
  69         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
  70         if (!hcd->regs) {
  71                 pr_debug(__FILE__ ": ioremap failed\n");
  72                 retval = -ENOMEM;
  73                 goto err2;
  74         }
  75
  76         if (pd->start && (retval = pd->start(pdev)))
  77                 goto err3;
  78
  79         ohci = hcd_to_ohci(hcd);
  80         ohci->flags |= OHCI_BIG_ENDIAN;
  81         ohci_hcd_init(ohci);
  82
  83         retval = usb_add_hcd(hcd, irq, SA_INTERRUPT);
  84         if (retval == 0)
  85                 return retval;
  86
  87         pr_debug("Removing PPC-SOC USB Controller\n");
  88         if (pd && pd->stop)
  89                 pd->stop(pdev);
  90  err3:
  91         iounmap(hcd->regs);
  92  err2:
  93         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
  94  err1:
  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 /**
 104  * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
 105  * @pdev: USB Host Controller being removed
 106  * Context: !in_interrupt()
 107  *
 108  * Reverses the effect of usb_hcd_ppc_soc_probe(), first invoking
 109  * the HCD's stop() method.  It is always called from a thread
 110  * context, normally "rmmod", "apmd", or something similar.
 111  *
 112  */
 113 static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
 114                 struct platform_device *pdev)
 115 {
 116         struct usb_hcd_platform_data *pd = pdev->dev.platform_data;
 117
 118         usb_remove_hcd(hcd);
 119
 120         pr_debug("stopping PPC-SOC USB Controller\n");
 121         if (pd && pd->stop)
 122                 pd->stop(pdev);
 123
 124         iounmap(hcd->regs);
 125         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 126         usb_hcd_put(hcd);
 127 }
 128
 129 static int __devinit
 130 ohci_ppc_soc_start(struct usb_hcd *hcd)
 131 {
 132         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 133         int             ret;
 134
 135         if ((ret = ohci_init(ohci)) < 0)
 136                 return ret;
 137
 138         if ((ret = ohci_run(ohci)) < 0) {
 139                 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
 140                 ohci_stop(hcd);
 141                 return ret;
 142         }
 143
 144         return 0;
 145 }
 146
 147 static const struct hc_driver ohci_ppc_soc_hc_driver = {
 148         .description =          hcd_name,
 149         .hcd_priv_size =        sizeof(struct ohci_hcd),
 150
 151         /*
 152          * generic hardware linkage
 153          */
 154         .irq =                  ohci_irq,
 155         .flags =                HCD_USB11 | HCD_MEMORY,
 156
 157         /*
 158          * basic lifecycle operations
 159          */
 160         .start =                ohci_ppc_soc_start,
 161         .stop =                 ohci_stop,
 162
 163         /*
 164          * managing i/o requests and associated device resources
 165          */
 166         .urb_enqueue =          ohci_urb_enqueue,
 167         .urb_dequeue =          ohci_urb_dequeue,
 168         .endpoint_disable =     ohci_endpoint_disable,
 169
 170         /*
 171          * scheduling support
 172          */
 173         .get_frame_number =     ohci_get_frame,
 174
 175         /*
 176          * root hub support
 177          */
 178         .hub_status_data =      ohci_hub_status_data,
 179         .hub_control =          ohci_hub_control,
 180 #ifdef  CONFIG_USB_SUSPEND
 181         .hub_suspend =          ohci_hub_suspend,
 182         .hub_resume =           ohci_hub_resume,
 183 #endif
 184         .start_port_reset =     ohci_start_port_reset,
 185 };
 186
 187 static int ohci_hcd_ppc_soc_drv_probe(struct device *dev)
 188 {
 189         struct platform_device *pdev = to_platform_device(dev);
 190         int ret;
 191
 192         if (usb_disabled())
 193                 return -ENODEV;
 194
 195         ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
 196         return ret;
 197 }
 198
 199 static int ohci_hcd_ppc_soc_drv_remove(struct device *dev)
 200 {
 201         struct platform_device *pdev = to_platform_device(dev);
 202         struct usb_hcd *hcd = dev_get_drvdata(dev);
 203
 204         usb_hcd_ppc_soc_remove(hcd, pdev);
 205         return 0;
 206 }
 207
 208 static struct device_driver ohci_hcd_ppc_soc_driver = {
 209         .name           = "ppc-soc-ohci",
 210         .bus            = &platform_bus_type,
 211         .probe          = ohci_hcd_ppc_soc_drv_probe,
 212         .remove         = ohci_hcd_ppc_soc_drv_remove,
 213 #if     defined(CONFIG_USB_SUSPEND) || defined(CONFIG_PM)
 214         /*.suspend      = ohci_hcd_ppc_soc_drv_suspend,*/
 215         /*.resume       = ohci_hcd_ppc_soc_drv_resume,*/
 216 #endif
 217 };
 218
 219 static int __init ohci_hcd_ppc_soc_init(void)
 220 {
 221         pr_debug(DRIVER_INFO " (PPC SOC)\n");
 222         pr_debug("block sizes: ed %d td %d\n", sizeof(struct ed),
 223                                                         sizeof(struct td));
 224
 225         return driver_register(&ohci_hcd_ppc_soc_driver);
 226 }
 227
 228 static void __exit ohci_hcd_ppc_soc_cleanup(void)
 229 {
 230         driver_unregister(&ohci_hcd_ppc_soc_driver);
 231 }
 232
 233 module_init(ohci_hcd_ppc_soc_init);
 234 module_exit(ohci_hcd_ppc_soc_cleanup);