drivers/usb/chipidea/ci13xxx_pci.c

   1 /*
   2  * ci13xxx_pci.c - MIPS USB IP core family device controller
   3  *
   4  * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
   5  *
   6  * Author: David Lopo
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/platform_device.h>
  14 #include <linux/module.h>
  15 #include <linux/pci.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/usb/gadget.h>
  18 #include <linux/usb/chipidea.h>
  19
  20 /* driver name */
  21 #define UDC_DRIVER_NAME   "ci13xxx_pci"
  22
  23 /******************************************************************************
  24  * PCI block
  25  *****************************************************************************/
  26 static struct ci13xxx_platform_data pci_platdata = {
  27         .name           = UDC_DRIVER_NAME,
  28         .capoffset      = DEF_CAPOFFSET,
  29 };
  30
  31 static struct ci13xxx_platform_data langwell_pci_platdata = {
  32         .name           = UDC_DRIVER_NAME,
  33         .capoffset      = 0,
  34 };
  35
  36 static struct ci13xxx_platform_data penwell_pci_platdata = {
  37         .name           = UDC_DRIVER_NAME,
  38         .capoffset      = 0,
  39         .power_budget   = 200,
  40 };
  41
  42 /**
  43  * ci13xxx_pci_probe: PCI probe
  44  * @pdev: USB device controller being probed
  45  * @id:   PCI hotplug ID connecting controller to UDC framework
  46  *
  47  * This function returns an error code
  48  * Allocates basic PCI resources for this USB device controller, and then
  49  * invokes the udc_probe() method to start the UDC associated with it
  50  */
  51 static int ci13xxx_pci_probe(struct pci_dev *pdev,
  52                                        const struct pci_device_id *id)
  53 {
  54         struct ci13xxx_platform_data *platdata = (void *)id->driver_data;
  55         struct platform_device *plat_ci;
  56         struct resource res[3];
  57         int retval = 0, nres = 2;
  58
  59         if (!platdata) {
  60                 dev_err(&pdev->dev, "device doesn't provide driver data\n");
  61                 return -ENODEV;
  62         }
  63
  64         retval = pci_enable_device(pdev);
  65         if (retval)
  66                 goto done;
  67
  68         if (!pdev->irq) {
  69                 dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
  70                 retval = -ENODEV;
  71                 goto disable_device;
  72         }
  73
  74         pci_set_power_state(pdev, PCI_D0);
  75         pci_set_master(pdev);
  76         pci_try_set_mwi(pdev);
  77
  78         memset(res, 0, sizeof(res));
  79         res[0].start    = pci_resource_start(pdev, 0);
  80         res[0].end      = pci_resource_end(pdev, 0);
  81         res[0].flags    = IORESOURCE_MEM;
  82         res[1].start    = pdev->irq;
  83         res[1].flags    = IORESOURCE_IRQ;
  84
  85         plat_ci = ci13xxx_add_device(&pdev->dev, res, nres, platdata);
  86         if (IS_ERR(plat_ci)) {
  87                 dev_err(&pdev->dev, "ci13xxx_add_device failed!\n");
  88                 retval = PTR_ERR(plat_ci);
  89                 goto disable_device;
  90         }
  91
  92         pci_set_drvdata(pdev, plat_ci);
  93
  94         return 0;
  95
  96  disable_device:
  97         pci_disable_device(pdev);
  98  done:
  99         return retval;
 100 }
 101
 102 /**
 103  * ci13xxx_pci_remove: PCI remove
 104  * @pdev: USB Device Controller being removed
 105  *
 106  * Reverses the effect of ci13xxx_pci_probe(),
 107  * first invoking the udc_remove() and then releases
 108  * all PCI resources allocated for this USB device controller
 109  */
 110 static void ci13xxx_pci_remove(struct pci_dev *pdev)
 111 {
 112         struct platform_device *plat_ci = pci_get_drvdata(pdev);
 113
 114         ci13xxx_remove_device(plat_ci);
 115         pci_set_drvdata(pdev, NULL);
 116         pci_disable_device(pdev);
 117 }
 118
 119 /**
 120  * PCI device table
 121  * PCI device structure
 122  *
 123  * Check "pci.h" for details
 124  */
 125 static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
 126         {
 127                 PCI_DEVICE(0x153F, 0x1004),
 128                 .driver_data = (kernel_ulong_t)&pci_platdata,
 129         },
 130         {
 131                 PCI_DEVICE(0x153F, 0x1006),
 132                 .driver_data = (kernel_ulong_t)&pci_platdata,
 133         },
 134         {
 135                 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0811),
 136                 .driver_data = (kernel_ulong_t)&langwell_pci_platdata,
 137         },
 138         {
 139                 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0829),
 140                 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
 141         },
 142         { 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
 143 };
 144 MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
 145
 146 static struct pci_driver ci13xxx_pci_driver = {
 147         .name         = UDC_DRIVER_NAME,
 148         .id_table     = ci13xxx_pci_id_table,
 149         .probe        = ci13xxx_pci_probe,
 150         .remove       = ci13xxx_pci_remove,
 151 };
 152
 153 module_pci_driver(ci13xxx_pci_driver);
 154
 155 MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
 156 MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
 157 MODULE_LICENSE("GPL");
 158 MODULE_VERSION("June 2008");