101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2006-2007 PA Semi, Inc
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*
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* SMBus host driver for PA Semi PWRficient
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/stddef.h>
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#include <linux/sched.h>
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#include <linux/i2c.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include "i2c-pasemi-core.h"
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#define CLK_100K_DIV 84
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#define CLK_400K_DIV 21
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static struct pci_driver pasemi_smb_pci_driver;
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static int pasemi_smb_pci_probe(struct pci_dev *dev,
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const struct pci_device_id *id)
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{
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struct pasemi_smbus *smbus;
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int error;
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if (!(pci_resource_flags(dev, 0) & IORESOURCE_IO))
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return -ENODEV;
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smbus = kzalloc(sizeof(struct pasemi_smbus), GFP_KERNEL);
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if (!smbus)
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return -ENOMEM;
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smbus->dev = &dev->dev;
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smbus->base = pci_resource_start(dev, 0);
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smbus->size = pci_resource_len(dev, 0);
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smbus->clk_div = CLK_100K_DIV;
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if (!request_region(smbus->base, smbus->size,
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pasemi_smb_pci_driver.name)) {
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error = -EBUSY;
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goto out_kfree;
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}
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smbus->ioaddr = pci_iomap(dev, 0, 0);
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if (!smbus->ioaddr) {
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error = -EBUSY;
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goto out_release_region;
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}
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error = pasemi_i2c_common_probe(smbus);
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if (error)
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goto out_ioport_unmap;
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pci_set_drvdata(dev, smbus);
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return 0;
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out_ioport_unmap:
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pci_iounmap(dev, smbus->ioaddr);
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out_release_region:
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release_region(smbus->base, smbus->size);
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out_kfree:
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kfree(smbus);
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return error;
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}
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static void pasemi_smb_pci_remove(struct pci_dev *dev)
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{
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struct pasemi_smbus *smbus = pci_get_drvdata(dev);
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i2c_del_adapter(&smbus->adapter);
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pci_iounmap(dev, smbus->ioaddr);
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release_region(smbus->base, smbus->size);
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kfree(smbus);
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}
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static const struct pci_device_id pasemi_smb_pci_ids[] = {
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{ PCI_DEVICE(0x1959, 0xa003) },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, pasemi_smb_pci_ids);
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static struct pci_driver pasemi_smb_pci_driver = {
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.name = "i2c-pasemi",
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.id_table = pasemi_smb_pci_ids,
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.probe = pasemi_smb_pci_probe,
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.remove = pasemi_smb_pci_remove,
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};
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module_pci_driver(pasemi_smb_pci_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
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MODULE_DESCRIPTION("PA Semi PWRficient SMBus driver");
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