180708Sjake// SPDX-License-Identifier: GPL-2.0 280708Sjake/* 380708Sjake * ci_hdrc_pci.c - MIPS USB IP core family device controller 480708Sjake * 580708Sjake * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. 680708Sjake * 780708Sjake * Author: David Lopo 880708Sjake */ 980708Sjake 1080708Sjake#include <linux/platform_device.h> 1180708Sjake#include <linux/module.h> 1280708Sjake#include <linux/pci.h> 1380708Sjake#include <linux/interrupt.h> 1480708Sjake#include <linux/usb/gadget.h> 1580708Sjake#include <linux/usb/chipidea.h> 1680708Sjake#include <linux/usb/usb_phy_generic.h> 1780708Sjake 1880708Sjake/* driver name */ 1980708Sjake#define UDC_DRIVER_NAME "ci_hdrc_pci" 2080708Sjake 2180708Sjakestruct ci_hdrc_pci { 2280708Sjake struct platform_device *ci; 2380708Sjake struct platform_device *phy; 2480708Sjake}; 2580708Sjake 2680708Sjake/****************************************************************************** 2780708Sjake * PCI block 2880708Sjake *****************************************************************************/ 2980708Sjakestatic struct ci_hdrc_platform_data pci_platdata = { 3080708Sjake .name = UDC_DRIVER_NAME, 3180708Sjake .capoffset = DEF_CAPOFFSET, 3280708Sjake}; 3380708Sjake 3480708Sjakestatic struct ci_hdrc_platform_data langwell_pci_platdata = { 3580708Sjake .name = UDC_DRIVER_NAME, 3680708Sjake .capoffset = 0, 3780708Sjake}; 3880708Sjake 3980708Sjakestatic struct ci_hdrc_platform_data penwell_pci_platdata = { 4080708Sjake .name = UDC_DRIVER_NAME, 4180708Sjake .capoffset = 0, 4280708Sjake .power_budget = 200, 4380708Sjake}; 4480708Sjake 4580708Sjake/** 4680708Sjake * ci_hdrc_pci_probe: PCI probe 4780708Sjake * @pdev: USB device controller being probed 4880708Sjake * @id: PCI hotplug ID connecting controller to UDC framework 4980708Sjake * 5080708Sjake * This function returns an error code 5180708Sjake * Allocates basic PCI resources for this USB device controller, and then 5280708Sjake * invokes the udc_probe() method to start the UDC associated with it 5380708Sjake */ 5480708Sjakestatic int ci_hdrc_pci_probe(struct pci_dev *pdev, 5580708Sjake const struct pci_device_id *id) 5680708Sjake{ 5780708Sjake struct ci_hdrc_platform_data *platdata = (void *)id->driver_data; 5880708Sjake struct ci_hdrc_pci *ci; 5980708Sjake struct resource res[3]; 6080708Sjake int retval = 0, nres = 2; 6180708Sjake 6280708Sjake if (!platdata) { 6380708Sjake dev_err(&pdev->dev, "device doesn't provide driver data\n"); 6480708Sjake return -ENODEV; 6580708Sjake } 6680708Sjake 6780708Sjake ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL); 6891336Sjake if (!ci) 6991336Sjake return -ENOMEM; 7091336Sjake 7180708Sjake retval = pcim_enable_device(pdev); 7280708Sjake if (retval) 7380708Sjake return retval; 7480709Sjake 75120710Salc if (!pdev->irq) { 7680709Sjake dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!"); 7780708Sjake return -ENODEV; 7880709Sjake } 79120710Salc 8080709Sjake pci_set_master(pdev); 8180708Sjake pci_try_set_mwi(pdev); 8280709Sjake 83120710Salc /* register a nop PHY */ 8480709Sjake ci->phy = usb_phy_generic_register(); 8580709Sjake if (IS_ERR(ci->phy)) 8680709Sjake return PTR_ERR(ci->phy); 87120710Salc 8880709Sjake memset(res, 0, sizeof(res)); 8980709Sjake res[0].start = pci_resource_start(pdev, 0); 90165324Skmacy res[0].end = pci_resource_end(pdev, 0); 91165324Skmacy res[0].flags = IORESOURCE_MEM; 92165324Skmacy res[1].start = pdev->irq; 93165324Skmacy res[1].flags = IORESOURCE_IRQ; 94165324Skmacy 95165324Skmacy ci->ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata); 96165324Skmacy if (IS_ERR(ci->ci)) { 97165324Skmacy dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n"); 9886226Stmm usb_phy_generic_unregister(ci->phy); 9986226Stmm return PTR_ERR(ci->ci); 10086226Stmm } 10180709Sjake 10280709Sjake pci_set_drvdata(pdev, ci); 10380709Sjake 10486226Stmm return 0; 10586226Stmm} 10686226Stmm 10780709Sjake/** 108118239Speter * ci_hdrc_pci_remove: PCI remove 10988781Sjake * @pdev: USB Device Controller being removed 110118239Speter * 111116355Salc * Reverses the effect of ci_hdrc_pci_probe(), 11291360Sjake * first invoking the udc_remove() and then releases 11383366Sjulian * all PCI resources allocated for this USB device controller 114151344Skris */ 115151344Skrisstatic void ci_hdrc_pci_remove(struct pci_dev *pdev) 116151344Skris{ 117151344Skris struct ci_hdrc_pci *ci = pci_get_drvdata(pdev); 118151344Skris 119151344Skris ci_hdrc_remove_device(ci->ci); 120151344Skris usb_phy_generic_unregister(ci->phy); 121151344Skris} 12283366Sjulian 12380708Sjake/* 12480708Sjake * PCI device table 12580708Sjake * PCI device structure 12680709Sjake * 12780708Sjake * Check "pci.h" for details 12880708Sjake * 12980708Sjake * Note: ehci-pci driver may try to probe the device first. You have to add an 13080708Sjake * ID to the bypass_pci_id_table in ehci-pci driver to prevent this. 13180708Sjake */ 13280708Sjakestatic const struct pci_device_id ci_hdrc_pci_id_table[] = { 13380708Sjake { 13480708Sjake PCI_DEVICE(0x153F, 0x1004), 13580708Sjake .driver_data = (kernel_ulong_t)&pci_platdata, 13680708Sjake }, 13780708Sjake { 13880708Sjake PCI_DEVICE(0x153F, 0x1006), 139 .driver_data = (kernel_ulong_t)&pci_platdata, 140 }, 141 { 142 PCI_VDEVICE(INTEL, 0x0811), 143 .driver_data = (kernel_ulong_t)&langwell_pci_platdata, 144 }, 145 { 146 PCI_VDEVICE(INTEL, 0x0829), 147 .driver_data = (kernel_ulong_t)&penwell_pci_platdata, 148 }, 149 { 150 /* Intel Clovertrail */ 151 PCI_VDEVICE(INTEL, 0xe006), 152 .driver_data = (kernel_ulong_t)&penwell_pci_platdata, 153 }, 154 { 0 } /* end: all zeroes */ 155}; 156MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table); 157 158static struct pci_driver ci_hdrc_pci_driver = { 159 .name = UDC_DRIVER_NAME, 160 .id_table = ci_hdrc_pci_id_table, 161 .probe = ci_hdrc_pci_probe, 162 .remove = ci_hdrc_pci_remove, 163}; 164 165module_pci_driver(ci_hdrc_pci_driver); 166 167MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>"); 168MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller"); 169MODULE_LICENSE("GPL"); 170MODULE_ALIAS("platform:ci13xxx_pci"); 171