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 #include <linux/usb/usb_phy_generic.h>
  20
  21 /* driver name */
  22 #define UDC_DRIVER_NAME   "ci_hdrc_pci"
  23
  24 struct ci_hdrc_pci {
  25         struct platform_device  *ci;
  26         struct platform_device  *phy;
  27 };
  28
  29 /******************************************************************************
  30  * PCI block
  31  *****************************************************************************/
  32 static struct ci_hdrc_platform_data pci_platdata = {
  33         .name           = UDC_DRIVER_NAME,
  34         .capoffset      = DEF_CAPOFFSET,
  35 };
  36
  37 static struct ci_hdrc_platform_data langwell_pci_platdata = {
  38         .name           = UDC_DRIVER_NAME,
  39         .capoffset      = 0,
  40 };
  41
  42 static struct ci_hdrc_platform_data penwell_pci_platdata = {
  43         .name           = UDC_DRIVER_NAME,
  44         .capoffset      = 0,
  45         .power_budget   = 200,
  46 };
  47
  48 /**
  49  * ci_hdrc_pci_probe: PCI probe
  50  * @pdev: USB device controller being probed
  51  * @id:   PCI hotplug ID connecting controller to UDC framework
  52  *
  53  * This function returns an error code
  54  * Allocates basic PCI resources for this USB device controller, and then
  55  * invokes the udc_probe() method to start the UDC associated with it
  56  */
  57 static int ci_hdrc_pci_probe(struct pci_dev *pdev,
  58                                        const struct pci_device_id *id)
  59 {
  60         struct ci_hdrc_platform_data *platdata = (void *)id->driver_data;
  61         struct ci_hdrc_pci *ci;
  62         struct resource res[3];
  63         int retval = 0, nres = 2;
  64
  65         if (!platdata) {
  66                 dev_err(&pdev->dev, "device doesn't provide driver data\n");
  67                 return -ENODEV;
  68         }
  69
  70         ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL);
  71         if (!ci)
  72                 return -ENOMEM;
  73
  74         retval = pcim_enable_device(pdev);
  75         if (retval)
  76                 return retval;
  77
  78         if (!pdev->irq) {
  79                 dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
  80                 return -ENODEV;
  81         }
  82
  83         pci_set_master(pdev);
  84         pci_try_set_mwi(pdev);
  85
  86         /* register a nop PHY */
  87         ci->phy = usb_phy_generic_register();
  88         if (IS_ERR(ci->phy))
  89                 return PTR_ERR(ci->phy);
  90
  91         memset(res, 0, sizeof(res));
  92         res[0].start    = pci_resource_start(pdev, 0);
  93         res[0].end      = pci_resource_end(pdev, 0);
  94         res[0].flags    = IORESOURCE_MEM;
  95         res[1].start    = pdev->irq;
  96         res[1].flags    = IORESOURCE_IRQ;
  97
  98         ci->ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata);
  99         if (IS_ERR(ci->ci)) {
 100                 dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
 101                 usb_phy_generic_unregister(ci->phy);
 102                 return PTR_ERR(ci->ci);
 103         }
 104
 105         pci_set_drvdata(pdev, ci);
 106
 107         return 0;
 108 }
 109
 110 /**
 111  * ci_hdrc_pci_remove: PCI remove
 112  * @pdev: USB Device Controller being removed
 113  *
 114  * Reverses the effect of ci_hdrc_pci_probe(),
 115  * first invoking the udc_remove() and then releases
 116  * all PCI resources allocated for this USB device controller
 117  */
 118 static void ci_hdrc_pci_remove(struct pci_dev *pdev)
 119 {
 120         struct ci_hdrc_pci *ci = pci_get_drvdata(pdev);
 121
 122         ci_hdrc_remove_device(ci->ci);
 123         usb_phy_generic_unregister(ci->phy);
 124 }
 125
 126 /**
 127  * PCI device table
 128  * PCI device structure
 129  *
 130  * Check "pci.h" for details
 131  *
 132  * Note: ehci-pci driver may try to probe the device first. You have to add an
 133  * ID to the bypass_pci_id_table in ehci-pci driver to prevent this.
 134  */
 135 static const struct pci_device_id ci_hdrc_pci_id_table[] = {
 136         {
 137                 PCI_DEVICE(0x153F, 0x1004),
 138                 .driver_data = (kernel_ulong_t)&pci_platdata,
 139         },
 140         {
 141                 PCI_DEVICE(0x153F, 0x1006),
 142                 .driver_data = (kernel_ulong_t)&pci_platdata,
 143         },
 144         {
 145                 PCI_VDEVICE(INTEL, 0x0811),
 146                 .driver_data = (kernel_ulong_t)&langwell_pci_platdata,
 147         },
 148         {
 149                 PCI_VDEVICE(INTEL, 0x0829),
 150                 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
 151         },
 152         {
 153                 /* Intel Clovertrail */
 154                 PCI_VDEVICE(INTEL, 0xe006),
 155                 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
 156         },
 157         { 0 } /* end: all zeroes */
 158 };
 159 MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table);
 160
 161 static struct pci_driver ci_hdrc_pci_driver = {
 162         .name         = UDC_DRIVER_NAME,
 163         .id_table     = ci_hdrc_pci_id_table,
 164         .probe        = ci_hdrc_pci_probe,
 165         .remove       = ci_hdrc_pci_remove,
 166 };
 167
 168 module_pci_driver(ci_hdrc_pci_driver);
 169
 170 MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
 171 MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
 172 MODULE_LICENSE("GPL");
 173 MODULE_VERSION("June 2008");
 174 MODULE_ALIAS("platform:ci13xxx_pci");