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
pasemi_smb_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)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
453abdc89bSSven Peter /*
463abdc89bSSven Peter * The original PASemi PCI controllers don't have a register for
473abdc89bSSven Peter * their HW revision.
483abdc89bSSven Peter */
493abdc89bSSven Peter smbus->hw_rev = PASEMI_HW_REV_PCI;
503abdc89bSSven 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
59*19e138e4SMartin Povišer smbus->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
609bc5f4f6SSven Peter error = pasemi_i2c_common_probe(smbus);
619bc5f4f6SSven Peter if (error)
62a2c34bfdSSven Peter return error;
639bc5f4f6SSven Peter
649bc5f4f6SSven Peter pci_set_drvdata(dev, smbus);
659bc5f4f6SSven Peter
669bc5f4f6SSven Peter return 0;
679bc5f4f6SSven Peter }
689bc5f4f6SSven Peter
699bc5f4f6SSven Peter static const struct pci_device_id pasemi_smb_pci_ids[] = {
709bc5f4f6SSven Peter { PCI_DEVICE(0x1959, 0xa003) },
719bc5f4f6SSven Peter { 0, }
729bc5f4f6SSven Peter };
739bc5f4f6SSven Peter
749bc5f4f6SSven Peter MODULE_DEVICE_TABLE(pci, pasemi_smb_pci_ids);
759bc5f4f6SSven Peter
769bc5f4f6SSven Peter static struct pci_driver pasemi_smb_pci_driver = {
779bc5f4f6SSven Peter .name = "i2c-pasemi",
789bc5f4f6SSven Peter .id_table = pasemi_smb_pci_ids,
799bc5f4f6SSven Peter .probe = pasemi_smb_pci_probe,
809bc5f4f6SSven Peter };
819bc5f4f6SSven Peter
829bc5f4f6SSven Peter module_pci_driver(pasemi_smb_pci_driver);
839bc5f4f6SSven Peter
849bc5f4f6SSven Peter MODULE_LICENSE("GPL");
859bc5f4f6SSven Peter MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
869bc5f4f6SSven Peter MODULE_DESCRIPTION("PA Semi PWRficient SMBus driver");
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