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 /* configure so an HC device and id are always provided */
  18 /* always called with process context; sleeping is OK */
  19
  20 /**
  21  * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs
  22  * Context: !in_interrupt()
  23  *
  24  * Allocates basic resources for this USB host controller.
  25  *
  26  * Store this function in the HCD's struct pci_driver as probe().
  27  */
  28 static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver,
  29                           struct platform_device *pdev)
  30 {
  31         int retval;
  32         struct usb_hcd *hcd;
  33         struct ohci_hcd *ohci;
  34         struct resource *res;
  35         int irq;
  36
  37         pr_debug("initializing PPC-SOC USB Controller\n");
  38
  39         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  40         if (!res) {
  41                 pr_debug(__FILE__ ": no irq\n");
  42                 return -ENODEV;
  43         }
  44         irq = res->start;
  45
  46         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  47         if (!res) {
  48                 pr_debug(__FILE__ ": no reg addr\n");
  49                 return -ENODEV;
  50         }
  51
  52         hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB");
  53         if (!hcd)
  54                 return -ENOMEM;
  55         hcd->rsrc_start = res->start;
  56         hcd->rsrc_len = res->end - res->start + 1;
  57
  58         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  59                 pr_debug(__FILE__ ": request_mem_region failed\n");
  60                 retval = -EBUSY;
  61                 goto err1;
  62         }
  63
  64         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
  65         if (!hcd->regs) {
  66                 pr_debug(__FILE__ ": ioremap failed\n");
  67                 retval = -ENOMEM;
  68                 goto err2;
  69         }
  70
  71         ohci = hcd_to_ohci(hcd);
  72         ohci->flags |= OHCI_BIG_ENDIAN;
  73         ohci_hcd_init(ohci);
  74
  75         retval = usb_add_hcd(hcd, irq, SA_INTERRUPT);
  76         if (retval == 0)
  77                 return retval;
  78
  79         pr_debug("Removing PPC-SOC USB Controller\n");
  80
  81         iounmap(hcd->regs);
  82  err2:
  83         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
  84  err1:
  85         usb_put_hcd(hcd);
  86         return retval;
  87 }
  88
  89
  90 /* may be called without controller electrically present */
  91 /* may be called with controller, bus, and devices active */
  92
  93 /**
  94  * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
  95  * @pdev: USB Host Controller being removed
  96  * Context: !in_interrupt()
  97  *
  98  * Reverses the effect of usb_hcd_ppc_soc_probe().
  99  * It is always called from a thread
 100  * context, normally "rmmod", "apmd", or something similar.
 101  *
 102  */
 103 static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
 104                 struct platform_device *pdev)
 105 {
 106         usb_remove_hcd(hcd);
 107
 108         pr_debug("stopping PPC-SOC USB Controller\n");
 109
 110         iounmap(hcd->regs);
 111         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 112         usb_put_hcd(hcd);
 113 }
 114
 115 static int __devinit
 116 ohci_ppc_soc_start(struct usb_hcd *hcd)
 117 {
 118         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 119         int             ret;
 120
 121         if ((ret = ohci_init(ohci)) < 0)
 122                 return ret;
 123
 124         if ((ret = ohci_run(ohci)) < 0) {
 125                 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
 126                 ohci_stop(hcd);
 127                 return ret;
 128         }
 129
 130         return 0;
 131 }
 132
 133 static const struct hc_driver ohci_ppc_soc_hc_driver = {
 134         .description =          hcd_name,
 135         .hcd_priv_size =        sizeof(struct ohci_hcd),
 136
 137         /*
 138          * generic hardware linkage
 139          */
 140         .irq =                  ohci_irq,
 141         .flags =                HCD_USB11 | HCD_MEMORY,
 142
 143         /*
 144          * basic lifecycle operations
 145          */
 146         .start =                ohci_ppc_soc_start,
 147         .stop =                 ohci_stop,
 148
 149         /*
 150          * managing i/o requests and associated device resources
 151          */
 152         .urb_enqueue =          ohci_urb_enqueue,
 153         .urb_dequeue =          ohci_urb_dequeue,
 154         .endpoint_disable =     ohci_endpoint_disable,
 155
 156         /*
 157          * scheduling support
 158          */
 159         .get_frame_number =     ohci_get_frame,
 160
 161         /*
 162          * root hub support
 163          */
 164         .hub_status_data =      ohci_hub_status_data,
 165         .hub_control =          ohci_hub_control,
 166 #ifdef  CONFIG_PM
 167         .bus_suspend =          ohci_bus_suspend,
 168         .bus_resume =           ohci_bus_resume,
 169 #endif
 170         .start_port_reset =     ohci_start_port_reset,
 171 };
 172
 173 static int ohci_hcd_ppc_soc_drv_probe(struct device *dev)
 174 {
 175         struct platform_device *pdev = to_platform_device(dev);
 176         int ret;
 177
 178         if (usb_disabled())
 179                 return -ENODEV;
 180
 181         ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
 182         return ret;
 183 }
 184
 185 static int ohci_hcd_ppc_soc_drv_remove(struct device *dev)
 186 {
 187         struct platform_device *pdev = to_platform_device(dev);
 188         struct usb_hcd *hcd = dev_get_drvdata(dev);
 189
 190         usb_hcd_ppc_soc_remove(hcd, pdev);
 191         return 0;
 192 }
 193
 194 static struct device_driver ohci_hcd_ppc_soc_driver = {
 195         .name           = "ppc-soc-ohci",
 196         .bus            = &platform_bus_type,
 197         .probe          = ohci_hcd_ppc_soc_drv_probe,
 198         .remove         = ohci_hcd_ppc_soc_drv_remove,
 199 #ifdef  CONFIG_PM
 200         /*.suspend      = ohci_hcd_ppc_soc_drv_suspend,*/
 201         /*.resume       = ohci_hcd_ppc_soc_drv_resume,*/
 202 #endif
 203 };
 204
 205 static int __init ohci_hcd_ppc_soc_init(void)
 206 {
 207         pr_debug(DRIVER_INFO " (PPC SOC)\n");
 208         pr_debug("block sizes: ed %d td %d\n", sizeof(struct ed),
 209                                                         sizeof(struct td));
 210
 211         return driver_register(&ohci_hcd_ppc_soc_driver);
 212 }
 213
 214 static void __exit ohci_hcd_ppc_soc_cleanup(void)
 215 {
 216         driver_unregister(&ohci_hcd_ppc_soc_driver);
 217 }
 218
 219 module_init(ohci_hcd_ppc_soc_init);
 220 module_exit(ohci_hcd_ppc_soc_cleanup);