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 <linux/platform_device.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.
  27  *
  28  * Store this function in the HCD's struct pci_driver as probe().
  29  */
  30 static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver,
  31                           struct platform_device *pdev)
  32 {
  33         int retval;
  34         struct usb_hcd *hcd;
  35         struct ohci_hcd *ohci;
  36         struct resource *res;
  37         int irq;
  38
  39         pr_debug("initializing PPC-SOC USB Controller\n");
  40
  41         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  42         if (!res) {
  43                 pr_debug(__FILE__ ": no irq\n");
  44                 return -ENODEV;
  45         }
  46         irq = res->start;
  47
  48         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  49         if (!res) {
  50                 pr_debug(__FILE__ ": no reg addr\n");
  51                 return -ENODEV;
  52         }
  53
  54         hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB");
  55         if (!hcd)
  56                 return -ENOMEM;
  57         hcd->rsrc_start = res->start;
  58         hcd->rsrc_len = res->end - res->start + 1;
  59
  60         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  61                 pr_debug(__FILE__ ": request_mem_region failed\n");
  62                 retval = -EBUSY;
  63                 goto err1;
  64         }
  65
  66         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
  67         if (!hcd->regs) {
  68                 pr_debug(__FILE__ ": ioremap failed\n");
  69                 retval = -ENOMEM;
  70                 goto err2;
  71         }
  72
  73         ohci = hcd_to_ohci(hcd);
  74         ohci->flags |= OHCI_BIG_ENDIAN;
  75         ohci_hcd_init(ohci);
  76
  77         retval = usb_add_hcd(hcd, irq, SA_INTERRUPT);
  78         if (retval == 0)
  79                 return retval;
  80
  81         pr_debug("Removing PPC-SOC USB Controller\n");
  82
  83         iounmap(hcd->regs);
  84  err2:
  85         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
  86  err1:
  87         usb_put_hcd(hcd);
  88         return retval;
  89 }
  90
  91
  92 /* may be called without controller electrically present */
  93 /* may be called with controller, bus, and devices active */
  94
  95 /**
  96  * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
  97  * @pdev: USB Host Controller being removed
  98  * Context: !in_interrupt()
  99  *
 100  * Reverses the effect of usb_hcd_ppc_soc_probe().
 101  * It is always called from a thread
 102  * context, normally "rmmod", "apmd", or something similar.
 103  *
 104  */
 105 static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
 106                 struct platform_device *pdev)
 107 {
 108         usb_remove_hcd(hcd);
 109
 110         pr_debug("stopping PPC-SOC USB Controller\n");
 111
 112         iounmap(hcd->regs);
 113         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 114         usb_put_hcd(hcd);
 115 }
 116
 117 static int __devinit
 118 ohci_ppc_soc_start(struct usb_hcd *hcd)
 119 {
 120         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 121         int             ret;
 122
 123         if ((ret = ohci_init(ohci)) < 0)
 124                 return ret;
 125
 126         if ((ret = ohci_run(ohci)) < 0) {
 127                 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
 128                 ohci_stop(hcd);
 129                 return ret;
 130         }
 131
 132         return 0;
 133 }
 134
 135 static const struct hc_driver ohci_ppc_soc_hc_driver = {
 136         .description =          hcd_name,
 137         .hcd_priv_size =        sizeof(struct ohci_hcd),
 138
 139         /*
 140          * generic hardware linkage
 141          */
 142         .irq =                  ohci_irq,
 143         .flags =                HCD_USB11 | HCD_MEMORY,
 144
 145         /*
 146          * basic lifecycle operations
 147          */
 148         .start =                ohci_ppc_soc_start,
 149         .stop =                 ohci_stop,
 150
 151         /*
 152          * managing i/o requests and associated device resources
 153          */
 154         .urb_enqueue =          ohci_urb_enqueue,
 155         .urb_dequeue =          ohci_urb_dequeue,
 156         .endpoint_disable =     ohci_endpoint_disable,
 157
 158         /*
 159          * scheduling support
 160          */
 161         .get_frame_number =     ohci_get_frame,
 162
 163         /*
 164          * root hub support
 165          */
 166         .hub_status_data =      ohci_hub_status_data,
 167         .hub_control =          ohci_hub_control,
 168 #ifdef  CONFIG_PM
 169         .bus_suspend =          ohci_bus_suspend,
 170         .bus_resume =           ohci_bus_resume,
 171 #endif
 172         .start_port_reset =     ohci_start_port_reset,
 173 };
 174
 175 static int ohci_hcd_ppc_soc_drv_probe(struct platform_device *pdev)
 176 {
 177         int ret;
 178
 179         if (usb_disabled())
 180                 return -ENODEV;
 181
 182         ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
 183         return ret;
 184 }
 185
 186 static int ohci_hcd_ppc_soc_drv_remove(struct platform_device *pdev)
 187 {
 188         struct usb_hcd *hcd = platform_get_drvdata(dev);
 189
 190         usb_hcd_ppc_soc_remove(hcd, pdev);
 191         return 0;
 192 }
 193
 194 static struct platform_driver ohci_hcd_ppc_soc_driver = {
 195         .probe          = ohci_hcd_ppc_soc_drv_probe,
 196         .remove         = ohci_hcd_ppc_soc_drv_remove,
 197 #ifdef  CONFIG_PM
 198         /*.suspend      = ohci_hcd_ppc_soc_drv_suspend,*/
 199         /*.resume       = ohci_hcd_ppc_soc_drv_resume,*/
 200 #endif
 201         .driver         = {
 202                 .name   = "ppc-soc-ohci",
 203                 .owner  = THIS_MODULE,
 204         },
 205 };
 206
 207 static int __init ohci_hcd_ppc_soc_init(void)
 208 {
 209         pr_debug(DRIVER_INFO " (PPC SOC)\n");
 210         pr_debug("block sizes: ed %d td %d\n", sizeof(struct ed),
 211                                                         sizeof(struct td));
 212
 213         return platform_driver_register(&ohci_hcd_ppc_soc_driver);
 214 }
 215
 216 static void __exit ohci_hcd_ppc_soc_cleanup(void)
 217 {
 218         platform_driver_unregister(&ohci_hcd_ppc_soc_driver);
 219 }
 220
 221 module_init(ohci_hcd_ppc_soc_init);
 222 module_exit(ohci_hcd_ppc_soc_cleanup);