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("%s: no irq\n", __FILE__);
  45                 return -ENODEV;
  46         }
  47         irq = res->start;
  48
  49         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  50         if (!res) {
  51                 pr_debug("%s: no reg addr\n", __FILE__);
  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 = resource_size(res);
  60
  61         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  62                 pr_debug("%s: request_mem_region failed\n", __FILE__);
  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("%s: ioremap failed\n", __FILE__);
  70                 retval = -ENOMEM;
  71                 goto err2;
  72         }
  73
  74         ohci = hcd_to_ohci(hcd);
  75         ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
  76
  77 #ifdef CONFIG_PPC_MPC52xx
  78         /* MPC52xx doesn't need frame_no shift */
  79         ohci->flags |= OHCI_QUIRK_FRAME_NO;
  80 #endif
  81         ohci_hcd_init(ohci);
  82
  83         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
  84         if (retval == 0)
  85                 return retval;
  86
  87         pr_debug("Removing PPC-SOC USB Controller\n");
  88
  89         iounmap(hcd->regs);
  90  err2:
  91         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
  92  err1:
  93         usb_put_hcd(hcd);
  94         return retval;
  95 }
  96
  97
  98 /* may be called without controller electrically present */
  99 /* may be called with controller, bus, and devices active */
 100
 101 /**
 102  * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
 103  * @pdev: USB Host Controller being removed
 104  * Context: !in_interrupt()
 105  *
 106  * Reverses the effect of usb_hcd_ppc_soc_probe().
 107  * It is always called from a thread
 108  * context, normally "rmmod", "apmd", or something similar.
 109  *
 110  */
 111 static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
 112                 struct platform_device *pdev)
 113 {
 114         usb_remove_hcd(hcd);
 115
 116         pr_debug("stopping PPC-SOC USB Controller\n");
 117
 118         iounmap(hcd->regs);
 119         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 120         usb_put_hcd(hcd);
 121 }
 122
 123 static int __devinit
 124 ohci_ppc_soc_start(struct usb_hcd *hcd)
 125 {
 126         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 127         int             ret;
 128
 129         if ((ret = ohci_init(ohci)) < 0)
 130                 return ret;
 131
 132         if ((ret = ohci_run(ohci)) < 0) {
 133                 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
 134                 ohci_stop(hcd);
 135                 return ret;
 136         }
 137
 138         return 0;
 139 }
 140
 141 static const struct hc_driver ohci_ppc_soc_hc_driver = {
 142         .description =          hcd_name,
 143         .hcd_priv_size =        sizeof(struct ohci_hcd),
 144
 145         /*
 146          * generic hardware linkage
 147          */
 148         .irq =                  ohci_irq,
 149         .flags =                HCD_USB11 | HCD_MEMORY,
 150
 151         /*
 152          * basic lifecycle operations
 153          */
 154         .start =                ohci_ppc_soc_start,
 155         .stop =                 ohci_stop,
 156         .shutdown =             ohci_shutdown,
 157
 158         /*
 159          * managing i/o requests and associated device resources
 160          */
 161         .urb_enqueue =          ohci_urb_enqueue,
 162         .urb_dequeue =          ohci_urb_dequeue,
 163         .endpoint_disable =     ohci_endpoint_disable,
 164
 165         /*
 166          * scheduling support
 167          */
 168         .get_frame_number =     ohci_get_frame,
 169
 170         /*
 171          * root hub support
 172          */
 173         .hub_status_data =      ohci_hub_status_data,
 174         .hub_control =          ohci_hub_control,
 175 #ifdef  CONFIG_PM
 176         .bus_suspend =          ohci_bus_suspend,
 177         .bus_resume =           ohci_bus_resume,
 178 #endif
 179         .start_port_reset =     ohci_start_port_reset,
 180 };
 181
 182 static int ohci_hcd_ppc_soc_drv_probe(struct platform_device *pdev)
 183 {
 184         int ret;
 185
 186         if (usb_disabled())
 187                 return -ENODEV;
 188
 189         ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
 190         return ret;
 191 }
 192
 193 static int ohci_hcd_ppc_soc_drv_remove(struct platform_device *pdev)
 194 {
 195         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 196
 197         usb_hcd_ppc_soc_remove(hcd, pdev);
 198         return 0;
 199 }
 200
 201 static struct platform_driver ohci_hcd_ppc_soc_driver = {
 202         .probe          = ohci_hcd_ppc_soc_drv_probe,
 203         .remove         = ohci_hcd_ppc_soc_drv_remove,
 204         .shutdown       = usb_hcd_platform_shutdown,
 205 #ifdef  CONFIG_PM
 206         /*.suspend      = ohci_hcd_ppc_soc_drv_suspend,*/
 207         /*.resume       = ohci_hcd_ppc_soc_drv_resume,*/
 208 #endif
 209         .driver         = {
 210                 .name   = "ppc-soc-ohci",
 211                 .owner  = THIS_MODULE,
 212         },
 213 };
 214
 215 MODULE_ALIAS("platform:ppc-soc-ohci");