drivers/usb/chipidea/ci_hdrc_pci.c

   1 /*
   2  * ci_hdrc_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   "ci_hdrc_pci"
  22
  23 /******************************************************************************
  24  * PCI block
  25  *****************************************************************************/
  26 static struct ci_hdrc_platform_data pci_platdata = {
  27         .name           = UDC_DRIVER_NAME,
  28         .capoffset      = DEF_CAPOFFSET,
  29 };
  30
  31 static struct ci_hdrc_platform_data langwell_pci_platdata = {
  32         .name           = UDC_DRIVER_NAME,
  33         .capoffset      = 0,
  34 };
  35
  36 static struct ci_hdrc_platform_data penwell_pci_platdata = {
  37         .name           = UDC_DRIVER_NAME,
  38         .capoffset      = 0,
  39         .power_budget   = 200,
  40 };
  41
  42 /**
  43  * ci_hdrc_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 ci_hdrc_pci_probe(struct pci_dev *pdev,
  52                                        const struct pci_device_id *id)
  53 {
  54         struct ci_hdrc_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 = pcim_enable_device(pdev);
  65         if (retval)
  66                 return retval;
  67
  68         if (!pdev->irq) {
  69                 dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
  70                 return -ENODEV;
  71         }
  72
  73         pci_set_master(pdev);
  74         pci_try_set_mwi(pdev);
  75
  76         memset(res, 0, sizeof(res));
  77         res[0].start    = pci_resource_start(pdev, 0);
  78         res[0].end      = pci_resource_end(pdev, 0);
  79         res[0].flags    = IORESOURCE_MEM;
  80         res[1].start    = pdev->irq;
  81         res[1].flags    = IORESOURCE_IRQ;
  82
  83         plat_ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata);
  84         if (IS_ERR(plat_ci)) {
  85                 dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
  86                 return PTR_ERR(plat_ci);
  87         }
  88
  89         pci_set_drvdata(pdev, plat_ci);
  90
  91         return 0;
  92 }
  93
  94 /**
  95  * ci_hdrc_pci_remove: PCI remove
  96  * @pdev: USB Device Controller being removed
  97  *
  98  * Reverses the effect of ci_hdrc_pci_probe(),
  99  * first invoking the udc_remove() and then releases
 100  * all PCI resources allocated for this USB device controller
 101  */
 102 static void ci_hdrc_pci_remove(struct pci_dev *pdev)
 103 {
 104         struct platform_device *plat_ci = pci_get_drvdata(pdev);
 105
 106         ci_hdrc_remove_device(plat_ci);
 107 }
 108
 109 /**
 110  * PCI device table
 111  * PCI device structure
 112  *
 113  * Check "pci.h" for details
 114  *
 115  * Note: ehci-pci driver may try to probe the device first. You have to add an
 116  * ID to the bypass_pci_id_table in ehci-pci driver to prevent this.
 117  */
 118 static const struct pci_device_id ci_hdrc_pci_id_table[] = {
 119         {
 120                 PCI_DEVICE(0x153F, 0x1004),
 121                 .driver_data = (kernel_ulong_t)&pci_platdata,
 122         },
 123         {
 124                 PCI_DEVICE(0x153F, 0x1006),
 125                 .driver_data = (kernel_ulong_t)&pci_platdata,
 126         },
 127         {
 128                 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0811),
 129                 .driver_data = (kernel_ulong_t)&langwell_pci_platdata,
 130         },
 131         {
 132                 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0829),
 133                 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
 134         },
 135         {
 136                 /* Intel Clovertrail */
 137                 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe006),
 138                 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
 139         },
 140         { 0 } /* end: all zeroes */
 141 };
 142 MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table);
 143
 144 static struct pci_driver ci_hdrc_pci_driver = {
 145         .name         = UDC_DRIVER_NAME,
 146         .id_table     = ci_hdrc_pci_id_table,
 147         .probe        = ci_hdrc_pci_probe,
 148         .remove       = ci_hdrc_pci_remove,
 149 };
 150
 151 module_pci_driver(ci_hdrc_pci_driver);
 152
 153 MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
 154 MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
 155 MODULE_LICENSE("GPL");
 156 MODULE_VERSION("June 2008");
 157 MODULE_ALIAS("platform:ci13xxx_pci");