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"); 175