Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | // SPDX-License-Identifier: GPL-2.0 /* * ci_hdrc_pci.c - MIPS USB IP core family device controller * * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. * * Author: David Lopo */ #include <linux/platform_device.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/interrupt.h> #include <linux/usb/gadget.h> #include <linux/usb/chipidea.h> #include <linux/usb/usb_phy_generic.h> /* driver name */ #define UDC_DRIVER_NAME "ci_hdrc_pci" struct ci_hdrc_pci { struct platform_device *ci; struct platform_device *phy; }; /****************************************************************************** * PCI block *****************************************************************************/ static struct ci_hdrc_platform_data pci_platdata = { .name = UDC_DRIVER_NAME, .capoffset = DEF_CAPOFFSET, }; static struct ci_hdrc_platform_data langwell_pci_platdata = { .name = UDC_DRIVER_NAME, .capoffset = 0, }; static struct ci_hdrc_platform_data penwell_pci_platdata = { .name = UDC_DRIVER_NAME, .capoffset = 0, .power_budget = 200, }; /** * ci_hdrc_pci_probe: PCI probe * @pdev: USB device controller being probed * @id: PCI hotplug ID connecting controller to UDC framework * * This function returns an error code * Allocates basic PCI resources for this USB device controller, and then * invokes the udc_probe() method to start the UDC associated with it */ static int ci_hdrc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct ci_hdrc_platform_data *platdata = (void *)id->driver_data; struct ci_hdrc_pci *ci; struct resource res[3]; int retval = 0, nres = 2; if (!platdata) { dev_err(&pdev->dev, "device doesn't provide driver data\n"); return -ENODEV; } ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL); if (!ci) return -ENOMEM; retval = pcim_enable_device(pdev); if (retval) return retval; if (!pdev->irq) { dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!"); return -ENODEV; } pci_set_master(pdev); pci_try_set_mwi(pdev); /* register a nop PHY */ ci->phy = usb_phy_generic_register(); if (IS_ERR(ci->phy)) return PTR_ERR(ci->phy); memset(res, 0, sizeof(res)); res[0].start = pci_resource_start(pdev, 0); res[0].end = pci_resource_end(pdev, 0); res[0].flags = IORESOURCE_MEM; res[1].start = pdev->irq; res[1].flags = IORESOURCE_IRQ; ci->ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata); if (IS_ERR(ci->ci)) { dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n"); usb_phy_generic_unregister(ci->phy); return PTR_ERR(ci->ci); } pci_set_drvdata(pdev, ci); return 0; } /** * ci_hdrc_pci_remove: PCI remove * @pdev: USB Device Controller being removed * * Reverses the effect of ci_hdrc_pci_probe(), * first invoking the udc_remove() and then releases * all PCI resources allocated for this USB device controller */ static void ci_hdrc_pci_remove(struct pci_dev *pdev) { struct ci_hdrc_pci *ci = pci_get_drvdata(pdev); ci_hdrc_remove_device(ci->ci); usb_phy_generic_unregister(ci->phy); } /* * PCI device table * PCI device structure * * Check "pci.h" for details * * Note: ehci-pci driver may try to probe the device first. You have to add an * ID to the bypass_pci_id_table in ehci-pci driver to prevent this. */ static const struct pci_device_id ci_hdrc_pci_id_table[] = { { PCI_DEVICE(0x153F, 0x1004), .driver_data = (kernel_ulong_t)&pci_platdata, }, { PCI_DEVICE(0x153F, 0x1006), .driver_data = (kernel_ulong_t)&pci_platdata, }, { PCI_VDEVICE(INTEL, 0x0811), .driver_data = (kernel_ulong_t)&langwell_pci_platdata, }, { PCI_VDEVICE(INTEL, 0x0829), .driver_data = (kernel_ulong_t)&penwell_pci_platdata, }, { /* Intel Clovertrail */ PCI_VDEVICE(INTEL, 0xe006), .driver_data = (kernel_ulong_t)&penwell_pci_platdata, }, { 0 } /* end: all zeroes */ }; MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table); static struct pci_driver ci_hdrc_pci_driver = { .name = UDC_DRIVER_NAME, .id_table = ci_hdrc_pci_id_table, .probe = ci_hdrc_pci_probe, .remove = ci_hdrc_pci_remove, }; module_pci_driver(ci_hdrc_pci_driver); MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>"); MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:ci13xxx_pci"); |