linux_kernel/drivers/mfd/intel-lpss-pci.c

/*
 * Intel LPSS PCI support.
 *
 * Copyright (C) 2015, Intel Corporation
 *
 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 *          Mika Westerberg <mika.westerberg@linux.intel.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/property.h>

#include "intel-lpss.h"

static int intel_lpss_pci_probe(struct pci_dev *pdev,
				const struct pci_device_id *id)
{
	struct intel_lpss_platform_info *info;
	int ret;

	ret = pcim_enable_device(pdev);
	if (ret)
		return ret;

	info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
			    GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	info->mem = &pdev->resource[0];
	info->irq = pdev->irq;

	/* Probably it is enough to set this for iDMA capable devices only */
	pci_set_master(pdev);

	ret = intel_lpss_probe(&pdev->dev, info);
	if (ret)
		return ret;

	pm_runtime_put(&pdev->dev);
	pm_runtime_allow(&pdev->dev);

	return 0;
}

static void intel_lpss_pci_remove(struct pci_dev *pdev)
{
	pm_runtime_forbid(&pdev->dev);
	pm_runtime_get_sync(&pdev->dev);

	intel_lpss_remove(&pdev->dev);
}

static INTEL_LPSS_PM_OPS(intel_lpss_pci_pm_ops);

static const struct intel_lpss_platform_info spt_info = {
	.clk_rate = 120000000,
};

static struct property_entry spt_i2c_properties[] = {
	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
	{ },
};

static struct property_set spt_i2c_pset = {
	.properties = spt_i2c_properties,
};

static const struct intel_lpss_platform_info spt_i2c_info = {
	.clk_rate = 120000000,
	.pset = &spt_i2c_pset,
};

static struct property_entry uart_properties[] = {
	PROPERTY_ENTRY_U32("reg-io-width", 4),
	PROPERTY_ENTRY_U32("reg-shift", 2),
	PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
	{ },
};

static struct property_set uart_pset = {
	.properties = uart_properties,
};

static const struct intel_lpss_platform_info spt_uart_info = {
	.clk_rate = 120000000,
	.clk_con_id = "baudclk",
	.pset = &uart_pset,
};

static const struct intel_lpss_platform_info bxt_info = {
	.clk_rate = 100000000,
};

static const struct intel_lpss_platform_info bxt_uart_info = {
	.clk_rate = 100000000,
	.clk_con_id = "baudclk",
	.pset = &uart_pset,
};

static struct property_entry bxt_i2c_properties[] = {
	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
	PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
	PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
	{ },
};

static struct property_set bxt_i2c_pset = {
	.properties = bxt_i2c_properties,
};

static const struct intel_lpss_platform_info bxt_i2c_info = {
	.clk_rate = 133000000,
	.pset = &bxt_i2c_pset,
};

static const struct pci_device_id intel_lpss_pci_ids[] = {
	/* BXT A-Step */
	{ PCI_VDEVICE(INTEL, 0x0aac), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0aae), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0ab0), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0ab2), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0ab4), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0ab6), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0ab8), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0aba), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x0abc), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x0abe), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x0ac0), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x0ac2), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x0ac4), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x0ac6), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x0aee), (kernel_ulong_t)&bxt_uart_info },
	/* BXT B-Step */
	{ PCI_VDEVICE(INTEL, 0x1aac), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1aae), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1ab0), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1ab2), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1ab4), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1ab6), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1ab8), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1aba), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x1abc), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x1abe), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x1ac0), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x1ac2), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x1ac4), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x1ac6), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x1aee), (kernel_ulong_t)&bxt_uart_info },

	/* APL */
	{ PCI_VDEVICE(INTEL, 0x5aac), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5aae), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5ab0), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5ab2), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5ab4), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5ab6), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5ab8), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5aba), (kernel_ulong_t)&bxt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x5abc), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x5abe), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x5ac0), (kernel_ulong_t)&bxt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x5ac2), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x5ac4), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x5ac6), (kernel_ulong_t)&bxt_info },
	{ PCI_VDEVICE(INTEL, 0x5aee), (kernel_ulong_t)&bxt_uart_info },
	/* SPT-LP */
	{ PCI_VDEVICE(INTEL, 0x9d27), (kernel_ulong_t)&spt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x9d28), (kernel_ulong_t)&spt_uart_info },
	{ PCI_VDEVICE(INTEL, 0x9d29), (kernel_ulong_t)&spt_info },
	{ PCI_VDEVICE(INTEL, 0x9d2a), (kernel_ulong_t)&spt_info },
	{ PCI_VDEVICE(INTEL, 0x9d60), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d61), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d62), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d63), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d64), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d65), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0x9d66), (kernel_ulong_t)&spt_uart_info },
	/* SPT-H */
	{ PCI_VDEVICE(INTEL, 0xa127), (kernel_ulong_t)&spt_uart_info },
	{ PCI_VDEVICE(INTEL, 0xa128), (kernel_ulong_t)&spt_uart_info },
	{ PCI_VDEVICE(INTEL, 0xa129), (kernel_ulong_t)&spt_info },
	{ PCI_VDEVICE(INTEL, 0xa12a), (kernel_ulong_t)&spt_info },
	{ PCI_VDEVICE(INTEL, 0xa160), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0xa161), (kernel_ulong_t)&spt_i2c_info },
	{ PCI_VDEVICE(INTEL, 0xa166), (kernel_ulong_t)&spt_uart_info },
	{ }
};
MODULE_DEVICE_TABLE(pci, intel_lpss_pci_ids);

static struct pci_driver intel_lpss_pci_driver = {
	.name = "intel-lpss",
	.id_table = intel_lpss_pci_ids,
	.probe = intel_lpss_pci_probe,
	.remove = intel_lpss_pci_remove,
	.driver = {
		.pm = &intel_lpss_pci_pm_ops,
	},
};

module_pci_driver(intel_lpss_pci_driver);

MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
MODULE_DESCRIPTION("Intel LPSS PCI driver");
MODULE_LICENSE("GPL v2");