| Pavankumar Kondeti | 409a15d | 2010-12-07 17:53:59 +0530 | [diff] [blame] | 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/module.h> |
| 14 | #include <linux/pci.h> |
| 15 | |
| 16 | #include "ci13xxx_udc.c" |
| 17 | |
| 18 | /* driver name */ |
| 19 | #define UDC_DRIVER_NAME "ci13xxx_pci" |
| 20 | |
| 21 | /****************************************************************************** |
| 22 | * PCI block |
| 23 | *****************************************************************************/ |
| 24 | /** |
| 25 | * ci13xxx_pci_irq: interrut handler |
| 26 | * @irq: irq number |
| 27 | * @pdev: USB Device Controller interrupt source |
| 28 | * |
| 29 | * This function returns IRQ_HANDLED if the IRQ has been handled |
| 30 | * This is an ISR don't trace, use attribute interface instead |
| 31 | */ |
| 32 | static irqreturn_t ci13xxx_pci_irq(int irq, void *pdev) |
| 33 | { |
| 34 | if (irq == 0) { |
| 35 | dev_err(&((struct pci_dev *)pdev)->dev, "Invalid IRQ0 usage!"); |
| 36 | return IRQ_HANDLED; |
| 37 | } |
| 38 | return udc_irq(); |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * ci13xxx_pci_probe: PCI probe |
| 43 | * @pdev: USB device controller being probed |
| 44 | * @id: PCI hotplug ID connecting controller to UDC framework |
| 45 | * |
| 46 | * This function returns an error code |
| 47 | * Allocates basic PCI resources for this USB device controller, and then |
| 48 | * invokes the udc_probe() method to start the UDC associated with it |
| 49 | */ |
| 50 | static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev, |
| 51 | const struct pci_device_id *id) |
| 52 | { |
| 53 | void __iomem *regs = NULL; |
| 54 | int retval = 0; |
| 55 | |
| 56 | if (id == NULL) |
| 57 | return -EINVAL; |
| 58 | |
| 59 | retval = pci_enable_device(pdev); |
| 60 | if (retval) |
| 61 | goto done; |
| 62 | |
| 63 | if (!pdev->irq) { |
| 64 | dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!"); |
| 65 | retval = -ENODEV; |
| 66 | goto disable_device; |
| 67 | } |
| 68 | |
| 69 | retval = pci_request_regions(pdev, UDC_DRIVER_NAME); |
| 70 | if (retval) |
| 71 | goto disable_device; |
| 72 | |
| 73 | /* BAR 0 holds all the registers */ |
| 74 | regs = pci_iomap(pdev, 0, 0); |
| 75 | if (!regs) { |
| 76 | dev_err(&pdev->dev, "Error mapping memory!"); |
| 77 | retval = -EFAULT; |
| 78 | goto release_regions; |
| 79 | } |
| 80 | pci_set_drvdata(pdev, (__force void *)regs); |
| 81 | |
| 82 | pci_set_master(pdev); |
| 83 | pci_try_set_mwi(pdev); |
| 84 | |
| 85 | retval = udc_probe(&pdev->dev, regs, UDC_DRIVER_NAME); |
| 86 | if (retval) |
| 87 | goto iounmap; |
| 88 | |
| 89 | /* our device does not have MSI capability */ |
| 90 | |
| 91 | retval = request_irq(pdev->irq, ci13xxx_pci_irq, IRQF_SHARED, |
| 92 | UDC_DRIVER_NAME, pdev); |
| 93 | if (retval) |
| 94 | goto gadget_remove; |
| 95 | |
| 96 | return 0; |
| 97 | |
| 98 | gadget_remove: |
| 99 | udc_remove(); |
| 100 | iounmap: |
| 101 | pci_iounmap(pdev, regs); |
| 102 | release_regions: |
| 103 | pci_release_regions(pdev); |
| 104 | disable_device: |
| 105 | pci_disable_device(pdev); |
| 106 | done: |
| 107 | return retval; |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * ci13xxx_pci_remove: PCI remove |
| 112 | * @pdev: USB Device Controller being removed |
| 113 | * |
| 114 | * Reverses the effect of ci13xxx_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 __devexit ci13xxx_pci_remove(struct pci_dev *pdev) |
| 119 | { |
| 120 | free_irq(pdev->irq, pdev); |
| 121 | udc_remove(); |
| 122 | pci_iounmap(pdev, (__force void __iomem *)pci_get_drvdata(pdev)); |
| 123 | pci_release_regions(pdev); |
| 124 | pci_disable_device(pdev); |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * PCI device table |
| 129 | * PCI device structure |
| 130 | * |
| 131 | * Check "pci.h" for details |
| 132 | */ |
| 133 | static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = { |
| 134 | { PCI_DEVICE(0x153F, 0x1004) }, |
| 135 | { PCI_DEVICE(0x153F, 0x1006) }, |
| 136 | { 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ } |
| 137 | }; |
| 138 | MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table); |
| 139 | |
| 140 | static struct pci_driver ci13xxx_pci_driver = { |
| 141 | .name = UDC_DRIVER_NAME, |
| 142 | .id_table = ci13xxx_pci_id_table, |
| 143 | .probe = ci13xxx_pci_probe, |
| 144 | .remove = __devexit_p(ci13xxx_pci_remove), |
| 145 | }; |
| 146 | |
| 147 | /** |
| 148 | * ci13xxx_pci_init: module init |
| 149 | * |
| 150 | * Driver load |
| 151 | */ |
| 152 | static int __init ci13xxx_pci_init(void) |
| 153 | { |
| 154 | return pci_register_driver(&ci13xxx_pci_driver); |
| 155 | } |
| 156 | module_init(ci13xxx_pci_init); |
| 157 | |
| 158 | /** |
| 159 | * ci13xxx_pci_exit: module exit |
| 160 | * |
| 161 | * Driver unload |
| 162 | */ |
| 163 | static void __exit ci13xxx_pci_exit(void) |
| 164 | { |
| 165 | pci_unregister_driver(&ci13xxx_pci_driver); |
| 166 | } |
| 167 | module_exit(ci13xxx_pci_exit); |
| 168 | |
| 169 | MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>"); |
| 170 | MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller"); |
| 171 | MODULE_LICENSE("GPL"); |
| 172 | MODULE_VERSION("June 2008"); |