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 #include <linux/signal.h>
  19
  20 /* configure so an HC device and id are always provided */
  21 /* always called with process context; sleeping is OK */
  22
  23 /**
  24  * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs
  25  * Context: !in_interrupt()
  26  *
  27  * Allocates basic resources for this USB host controller.
  28  *
  29  * Store this function in the HCD's struct pci_driver as probe().
  30  */
  31 static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver,
  32                           struct platform_device *pdev)
  33 {
  34         int retval;
  35         struct usb_hcd *hcd;
  36         struct ohci_hcd *ohci;
  37         struct resource *res;
  38         int irq;
  39
  40         pr_debug("initializing PPC-SOC USB Controller\n");
  41
  42         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  43         if (!res) {
  44                 pr_debug(__FILE__ ": no irq\n");
  45                 return -ENODEV;
  46         }
  47         irq = res->start;
  48
  49         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  50         if (!res) {
  51                 pr_debug(__FILE__ ": no reg addr\n");
  52                 return -ENODEV;
  53         }
  54
  55         hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB");
  56         if (!hcd)
  57                 return -ENOMEM;
  58         hcd->rsrc_start = res->start;
  59         hcd->rsrc_len = res->end - res->start + 1;
  60
  61         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  62                 pr_debug(__FILE__ ": request_mem_region failed\n");
  63                 retval = -EBUSY;
  64                 goto err1;
  65         }
  66
  67         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
  68         if (!hcd->regs) {
  69                 pr_debug(__FILE__ ": ioremap failed\n");
  70                 retval = -ENOMEM;
  71                 goto err2;
  72         }
  73
  74         ohci = hcd_to_ohci(hcd);
  75         ohci->flags |= OHCI_BIG_ENDIAN;
  76         ohci_hcd_init(ohci);
  77
  78         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
  79         if (retval == 0)
  80                 return retval;
  81
  82         pr_debug("Removing PPC-SOC USB Controller\n");
  83
  84         iounmap(hcd->regs);
  85  err2:
  86         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
  87  err1:
  88         usb_put_hcd(hcd);
  89         return retval;
  90 }
  91
  92
  93 /* may be called without controller electrically present */
  94 /* may be called with controller, bus, and devices active */
  95
  96 /**
  97  * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
  98  * @pdev: USB Host Controller being removed
  99  * Context: !in_interrupt()
 100  *
 101  * Reverses the effect of usb_hcd_ppc_soc_probe().
 102  * It is always called from a thread
 103  * context, normally "rmmod", "apmd", or something similar.
 104  *
 105  */
 106 static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
 107                 struct platform_device *pdev)
 108 {
 109         usb_remove_hcd(hcd);
 110
 111         pr_debug("stopping PPC-SOC USB Controller\n");
 112
 113         iounmap(hcd->regs);
 114         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 115         usb_put_hcd(hcd);
 116 }
 117
 118 static int __devinit
 119 ohci_ppc_soc_start(struct usb_hcd *hcd)
 120 {
 121         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 122         int             ret;
 123
 124         if ((ret = ohci_init(ohci)) < 0)
 125                 return ret;
 126
 127         if ((ret = ohci_run(ohci)) < 0) {
 128                 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
 129                 ohci_stop(hcd);
 130                 return ret;
 131         }
 132
 133         return 0;
 134 }
 135
 136 static const struct hc_driver ohci_ppc_soc_hc_driver = {
 137         .description =          hcd_name,
 138         .hcd_priv_size =        sizeof(struct ohci_hcd),
 139
 140         /*
 141          * generic hardware linkage
 142          */
 143         .irq =                  ohci_irq,
 144         .flags =                HCD_USB11 | HCD_MEMORY,
 145
 146         /*
 147          * basic lifecycle operations
 148          */
 149         .start =                ohci_ppc_soc_start,
 150         .stop =                 ohci_stop,
 151
 152         /*
 153          * managing i/o requests and associated device resources
 154          */
 155         .urb_enqueue =          ohci_urb_enqueue,
 156         .urb_dequeue =          ohci_urb_dequeue,
 157         .endpoint_disable =     ohci_endpoint_disable,
 158
 159         /*
 160          * scheduling support
 161          */
 162         .get_frame_number =     ohci_get_frame,
 163
 164         /*
 165          * root hub support
 166          */
 167         .hub_status_data =      ohci_hub_status_data,
 168         .hub_control =          ohci_hub_control,
 169 #ifdef  CONFIG_PM
 170         .bus_suspend =          ohci_bus_suspend,
 171         .bus_resume =           ohci_bus_resume,
 172 #endif
 173         .start_port_reset =     ohci_start_port_reset,
 174 };
 175
 176 static int ohci_hcd_ppc_soc_drv_probe(struct platform_device *pdev)
 177 {
 178         int ret;
 179
 180         if (usb_disabled())
 181                 return -ENODEV;
 182
 183         ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
 184         return ret;
 185 }
 186
 187 static int ohci_hcd_ppc_soc_drv_remove(struct platform_device *pdev)
 188 {
 189         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 190
 191         usb_hcd_ppc_soc_remove(hcd, pdev);
 192         return 0;
 193 }
 194
 195 static struct platform_driver ohci_hcd_ppc_soc_driver = {
 196         .probe          = ohci_hcd_ppc_soc_drv_probe,
 197         .remove         = ohci_hcd_ppc_soc_drv_remove,
 198 #ifdef  CONFIG_PM
 199         /*.suspend      = ohci_hcd_ppc_soc_drv_suspend,*/
 200         /*.resume       = ohci_hcd_ppc_soc_drv_resume,*/
 201 #endif
 202         .driver         = {
 203                 .name   = "ppc-soc-ohci",
 204                 .owner  = THIS_MODULE,
 205         },
 206 };
 207
 208 static int __init ohci_hcd_ppc_soc_init(void)
 209 {
 210         pr_debug(DRIVER_INFO " (PPC SOC)\n");
 211         pr_debug("block sizes: ed %d td %d\n", sizeof(struct ed),
 212                                                         sizeof(struct td));
 213
 214         return platform_driver_register(&ohci_hcd_ppc_soc_driver);
 215 }
 216
 217 static void __exit ohci_hcd_ppc_soc_cleanup(void)
 218 {
 219         platform_driver_unregister(&ohci_hcd_ppc_soc_driver);
 220 }
 221
 222 module_init(ohci_hcd_ppc_soc_init);
 223 module_exit(ohci_hcd_ppc_soc_cleanup);