19bc5f4f6SSven Peter // SPDX-License-Identifier: GPL-2.0-only 29bc5f4f6SSven Peter /* 39bc5f4f6SSven Peter * Copyright (C) 2006-2007 PA Semi, Inc 49bc5f4f6SSven Peter * 59bc5f4f6SSven Peter * SMBus host driver for PA Semi PWRficient 69bc5f4f6SSven Peter */ 79bc5f4f6SSven Peter 89bc5f4f6SSven Peter #include <linux/module.h> 99bc5f4f6SSven Peter #include <linux/pci.h> 109bc5f4f6SSven Peter #include <linux/kernel.h> 119bc5f4f6SSven Peter #include <linux/stddef.h> 129bc5f4f6SSven Peter #include <linux/sched.h> 139bc5f4f6SSven Peter #include <linux/i2c.h> 149bc5f4f6SSven Peter #include <linux/delay.h> 159bc5f4f6SSven Peter #include <linux/slab.h> 169bc5f4f6SSven Peter #include <linux/io.h> 179bc5f4f6SSven Peter 189bc5f4f6SSven Peter #include "i2c-pasemi-core.h" 199bc5f4f6SSven Peter 20fd664ab2SSven Peter #define CLK_100K_DIV 84 21fd664ab2SSven Peter #define CLK_400K_DIV 21 22fd664ab2SSven Peter 239bc5f4f6SSven Peter static struct pci_driver pasemi_smb_pci_driver; 249bc5f4f6SSven Peter 259bc5f4f6SSven Peter static int pasemi_smb_pci_probe(struct pci_dev *dev, 269bc5f4f6SSven Peter const struct pci_device_id *id) 279bc5f4f6SSven Peter { 289bc5f4f6SSven Peter struct pasemi_smbus *smbus; 29a2c34bfdSSven Peter unsigned long base; 30a2c34bfdSSven Peter int size; 319bc5f4f6SSven Peter int error; 329bc5f4f6SSven Peter 339bc5f4f6SSven Peter if (!(pci_resource_flags(dev, 0) & IORESOURCE_IO)) 349bc5f4f6SSven Peter return -ENODEV; 359bc5f4f6SSven Peter 36a2c34bfdSSven Peter smbus = devm_kzalloc(&dev->dev, sizeof(*smbus), GFP_KERNEL); 379bc5f4f6SSven Peter if (!smbus) 389bc5f4f6SSven Peter return -ENOMEM; 399bc5f4f6SSven Peter 409bc5f4f6SSven Peter smbus->dev = &dev->dev; 41a2c34bfdSSven Peter base = pci_resource_start(dev, 0); 42a2c34bfdSSven Peter size = pci_resource_len(dev, 0); 43fd664ab2SSven Peter smbus->clk_div = CLK_100K_DIV; 449bc5f4f6SSven Peter 45*3abdc89bSSven Peter /* 46*3abdc89bSSven Peter * The original PASemi PCI controllers don't have a register for 47*3abdc89bSSven Peter * their HW revision. 48*3abdc89bSSven Peter */ 49*3abdc89bSSven Peter smbus->hw_rev = PASEMI_HW_REV_PCI; 50*3abdc89bSSven Peter 51a2c34bfdSSven Peter if (!devm_request_region(&dev->dev, base, size, 52a2c34bfdSSven Peter pasemi_smb_pci_driver.name)) 53a2c34bfdSSven Peter return -EBUSY; 549bc5f4f6SSven Peter 55a2c34bfdSSven Peter smbus->ioaddr = pcim_iomap(dev, 0, 0); 56a2c34bfdSSven Peter if (!smbus->ioaddr) 57a2c34bfdSSven Peter return -EBUSY; 589bc5f4f6SSven Peter 599bc5f4f6SSven Peter error = pasemi_i2c_common_probe(smbus); 609bc5f4f6SSven Peter if (error) 61a2c34bfdSSven Peter return error; 629bc5f4f6SSven Peter 639bc5f4f6SSven Peter pci_set_drvdata(dev, smbus); 649bc5f4f6SSven Peter 659bc5f4f6SSven Peter return 0; 669bc5f4f6SSven Peter } 679bc5f4f6SSven Peter 689bc5f4f6SSven Peter static const struct pci_device_id pasemi_smb_pci_ids[] = { 699bc5f4f6SSven Peter { PCI_DEVICE(0x1959, 0xa003) }, 709bc5f4f6SSven Peter { 0, } 719bc5f4f6SSven Peter }; 729bc5f4f6SSven Peter 739bc5f4f6SSven Peter MODULE_DEVICE_TABLE(pci, pasemi_smb_pci_ids); 749bc5f4f6SSven Peter 759bc5f4f6SSven Peter static struct pci_driver pasemi_smb_pci_driver = { 769bc5f4f6SSven Peter .name = "i2c-pasemi", 779bc5f4f6SSven Peter .id_table = pasemi_smb_pci_ids, 789bc5f4f6SSven Peter .probe = pasemi_smb_pci_probe, 799bc5f4f6SSven Peter }; 809bc5f4f6SSven Peter 819bc5f4f6SSven Peter module_pci_driver(pasemi_smb_pci_driver); 829bc5f4f6SSven Peter 839bc5f4f6SSven Peter MODULE_LICENSE("GPL"); 849bc5f4f6SSven Peter MODULE_AUTHOR("Olof Johansson <olof@lixom.net>"); 859bc5f4f6SSven Peter MODULE_DESCRIPTION("PA Semi PWRficient SMBus driver"); 86