drivers/usb/host/ohci-xls.c

   1 /*
   2  * OHCI HCD for Netlogic XLS processors.
   3  *
   4  * (C) Copyright 2011 Netlogic Microsystems Inc.
   5  *
   6  *  Based on ohci-au1xxx.c, and other Linux OHCI drivers.
   7  *
   8  * This file is subject to the terms and conditions of the GNU General Public
   9  * License.  See the file COPYING in the main directory of this archive for
  10  * more details.
  11  */
  12
  13 #include <linux/platform_device.h>
  14 #include <linux/signal.h>
  15
  16 static int ohci_xls_probe_internal(const struct hc_driver *driver,
  17                         struct platform_device *dev)
  18 {
  19         struct resource *res;
  20         struct usb_hcd *hcd;
  21         int retval, irq;
  22
  23         /* Get our IRQ from an earlier registered Platform Resource */
  24         irq = platform_get_irq(dev, 0);
  25         if (irq < 0) {
  26                 dev_err(&dev->dev, "Found HC with no IRQ\n");
  27                 return -ENODEV;
  28         }
  29
  30         /* Get our Memory Handle */
  31         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
  32         if (!res) {
  33                 dev_err(&dev->dev, "MMIO Handle incorrect!\n");
  34                 return -ENODEV;
  35         }
  36
  37         hcd = usb_create_hcd(driver, &dev->dev, "XLS");
  38         if (!hcd) {
  39                 retval = -ENOMEM;
  40                 goto err1;
  41         }
  42         hcd->rsrc_start = res->start;
  43         hcd->rsrc_len = resource_size(res);
  44
  45         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
  46                         driver->description)) {
  47                 dev_dbg(&dev->dev, "Controller already in use\n");
  48                 retval = -EBUSY;
  49                 goto err2;
  50         }
  51
  52         hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
  53         if (hcd->regs == NULL) {
  54                 dev_dbg(&dev->dev, "error mapping memory\n");
  55                 retval = -EFAULT;
  56                 goto err3;
  57         }
  58
  59         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
  60         if (retval != 0)
  61                 goto err4;
  62         return retval;
  63
  64 err4:
  65         iounmap(hcd->regs);
  66 err3:
  67         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
  68 err2:
  69         usb_put_hcd(hcd);
  70 err1:
  71         dev_err(&dev->dev, "init fail, %d\n", retval);
  72         return retval;
  73 }
  74
  75 static int ohci_xls_reset(struct usb_hcd *hcd)
  76 {
  77         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  78
  79         ohci_hcd_init(ohci);
  80         return ohci_init(ohci);
  81 }
  82
  83 static int __devinit ohci_xls_start(struct usb_hcd *hcd)
  84 {
  85         struct ohci_hcd *ohci;
  86         int ret;
  87
  88         ohci = hcd_to_ohci(hcd);
  89         ret = ohci_run(ohci);
  90         if (ret < 0) {
  91                 err("can't start %s", hcd->self.bus_name);
  92                 ohci_stop(hcd);
  93                 return ret;
  94         }
  95         return 0;
  96 }
  97
  98 static struct hc_driver ohci_xls_hc_driver = {
  99         .description    = hcd_name,
 100         .product_desc   = "XLS OHCI Host Controller",
 101         .hcd_priv_size  = sizeof(struct ohci_hcd),
 102         .irq            = ohci_irq,
 103         .flags          = HCD_MEMORY | HCD_USB11,
 104         .reset          = ohci_xls_reset,
 105         .start          = ohci_xls_start,
 106         .stop           = ohci_stop,
 107         .shutdown       = ohci_shutdown,
 108         .urb_enqueue    = ohci_urb_enqueue,
 109         .urb_dequeue    = ohci_urb_dequeue,
 110         .endpoint_disable = ohci_endpoint_disable,
 111         .get_frame_number = ohci_get_frame,
 112         .hub_status_data = ohci_hub_status_data,
 113         .hub_control    = ohci_hub_control,
 114 #ifdef CONFIG_PM
 115         .bus_suspend    = ohci_bus_suspend,
 116         .bus_resume     = ohci_bus_resume,
 117 #endif
 118         .start_port_reset = ohci_start_port_reset,
 119 };
 120
 121 static int ohci_xls_probe(struct platform_device *dev)
 122 {
 123         int ret;
 124
 125         pr_debug("In ohci_xls_probe");
 126         if (usb_disabled())
 127                 return -ENODEV;
 128         ret = ohci_xls_probe_internal(&ohci_xls_hc_driver, dev);
 129         return ret;
 130 }
 131
 132 static int ohci_xls_remove(struct platform_device *dev)
 133 {
 134         struct usb_hcd *hcd = platform_get_drvdata(dev);
 135
 136         usb_remove_hcd(hcd);
 137         iounmap(hcd->regs);
 138         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 139         usb_put_hcd(hcd);
 140         return 0;
 141 }
 142
 143 static struct platform_driver ohci_xls_driver = {
 144         .probe          = ohci_xls_probe,
 145         .remove         = ohci_xls_remove,
 146         .shutdown       = usb_hcd_platform_shutdown,
 147         .driver         = {
 148                 .name   = "ohci-xls-0",
 149                 .owner  = THIS_MODULE,
 150         },
 151 };