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 struct ci13xxx_udc_driver pci_driver = {
  27         .name           = UDC_DRIVER_NAME,
  28         .capoffset      = DEF_CAPOFFSET,
  29 };
  30
  31 struct ci13xxx_udc_driver langwell_pci_driver = {
  32         .name           = UDC_DRIVER_NAME,
  33         .capoffset      = 0,
  34 };
  35
  36 /**
  37  * ci13xxx_pci_probe: PCI probe
  38  * @pdev: USB device controller being probed
  39  * @id:   PCI hotplug ID connecting controller to UDC framework
  40  *
  41  * This function returns an error code
  42  * Allocates basic PCI resources for this USB device controller, and then
  43  * invokes the udc_probe() method to start the UDC associated with it
  44  */
  45 static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
  46                                        const struct pci_device_id *id)
  47 {
  48         struct ci13xxx_udc_driver *driver = (void *)id->driver_data;
  49         struct platform_device *plat_ci;
  50         struct resource res[3];
  51         int retval = 0, nres = 2;
  52
  53         if (!driver) {
  54                 dev_err(&pdev->dev, "device doesn't provide driver data\n");
  55                 return -ENODEV;
  56         }
  57
  58         retval = pci_enable_device(pdev);
  59         if (retval)
  60                 goto done;
  61
  62         if (!pdev->irq) {
  63                 dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
  64                 retval = -ENODEV;
  65                 goto disable_device;
  66         }
  67
  68         pci_set_power_state(pdev, PCI_D0);
  69         pci_set_master(pdev);
  70         pci_try_set_mwi(pdev);
  71
  72         plat_ci = platform_device_alloc("ci_udc", -1);
  73         if (!plat_ci) {
  74                 dev_err(&pdev->dev, "can't allocate ci_udc platform device\n");
  75                 retval = -ENOMEM;
  76                 goto disable_device;
  77         }
  78
  79         memset(res, 0, sizeof(res));
  80         res[0].start    = pci_resource_start(pdev, 0);
  81         res[0].end      = pci_resource_end(pdev, 0);
  82         res[0].flags    = IORESOURCE_MEM;
  83         res[1].start    = pdev->irq;
  84         res[1].flags    = IORESOURCE_IRQ;
  85
  86         retval = platform_device_add_resources(plat_ci, res, nres);
  87         if (retval) {
  88                 dev_err(&pdev->dev, "can't add resources to platform device\n");
  89                 goto put_platform;
  90         }
  91
  92         retval = platform_device_add_data(plat_ci, driver, sizeof(*driver));
  93         if (retval)
  94                 goto put_platform;
  95
  96         dma_set_coherent_mask(&plat_ci->dev, pdev->dev.coherent_dma_mask);
  97         plat_ci->dev.dma_mask = pdev->dev.dma_mask;
  98         plat_ci->dev.dma_parms = pdev->dev.dma_parms;
  99         plat_ci->dev.parent = &pdev->dev;
 100
 101         pci_set_drvdata(pdev, plat_ci);
 102
 103         retval = platform_device_add(plat_ci);
 104         if (retval)
 105                 goto put_platform;
 106
 107         return 0;
 108
 109  put_platform:
 110         pci_set_drvdata(pdev, NULL);
 111         platform_device_put(plat_ci);
 112  disable_device:
 113         pci_disable_device(pdev);
 114  done:
 115         return retval;
 116 }
 117
 118 /**
 119  * ci13xxx_pci_remove: PCI remove
 120  * @pdev: USB Device Controller being removed
 121  *
 122  * Reverses the effect of ci13xxx_pci_probe(),
 123  * first invoking the udc_remove() and then releases
 124  * all PCI resources allocated for this USB device controller
 125  */
 126 static void __devexit ci13xxx_pci_remove(struct pci_dev *pdev)
 127 {
 128         struct platform_device *plat_ci = pci_get_drvdata(pdev);
 129
 130         platform_device_unregister(plat_ci);
 131         pci_set_drvdata(pdev, NULL);
 132         pci_disable_device(pdev);
 133 }
 134
 135 /**
 136  * PCI device table
 137  * PCI device structure
 138  *
 139  * Check "pci.h" for details
 140  */
 141 static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
 142         {
 143                 PCI_DEVICE(0x153F, 0x1004),
 144                 .driver_data = (kernel_ulong_t)&pci_driver,
 145         },
 146         {
 147                 PCI_DEVICE(0x153F, 0x1006),
 148                 .driver_data = (kernel_ulong_t)&pci_driver,
 149         },
 150         {
 151                 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0811),
 152                 .driver_data = (kernel_ulong_t)&langwell_pci_driver,
 153         },
 154         {
 155                 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0829),
 156                 .driver_data = (kernel_ulong_t)&langwell_pci_driver,
 157         },
 158         { 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
 159 };
 160 MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
 161
 162 static struct pci_driver ci13xxx_pci_driver = {
 163         .name         = UDC_DRIVER_NAME,
 164         .id_table     = ci13xxx_pci_id_table,
 165         .probe        = ci13xxx_pci_probe,
 166         .remove       = __devexit_p(ci13xxx_pci_remove),
 167 };
 168
 169 module_pci_driver(ci13xxx_pci_driver);
 170
 171 MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
 172 MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
 173 MODULE_LICENSE("GPL");
 174 MODULE_VERSION("June 2008");