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"); 158