drivers/i2c/busses/i2c-designware-pcidrv.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Synopsys DesignWare I2C adapter driver (master only).
  *
  * Based on the TI DAVINCI I2C adapter driver.
  *
  * Copyright (C) 2006 Texas Instruments.
  * Copyright (C) 2007 MontaVista Software Inc.
  * Copyright (C) 2009 Provigent Ltd.
  * Copyright (C) 2011, 2015, 2016 Intel Corporation.
  */
 #include <linux/acpi.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/errno.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/pm_runtime.h>
 #include <linux/sched.h>
 #include <linux/slab.h>

 #include "i2c-designware-core.h"

 #define DRIVER_NAME "i2c-designware-pci"
 #define AMD_CLK_RATE_HZ	100000

 enum dw_pci_ctl_id_t {
 	medfield,
 	merrifield,
 	baytrail,
 	cherrytrail,
 	haswell,
 	elkhartlake,
 	navi_amd,
 };

 struct dw_scl_sda_cfg {
 	u32 ss_hcnt;
 	u32 fs_hcnt;
 	u32 ss_lcnt;
 	u32 fs_lcnt;
 	u32 sda_hold;
 };

 struct dw_pci_controller {
 	u32 bus_num;
 	u32 flags;
 	struct dw_scl_sda_cfg *scl_sda_cfg;
 	int (*setup)(struct pci_dev *pdev, struct dw_pci_controller *c);
 	u32 (*get_clk_rate_khz)(struct dw_i2c_dev *dev);
 };

 /* Merrifield HCNT/LCNT/SDA hold time */
 static struct dw_scl_sda_cfg mrfld_config = {
 	.ss_hcnt = 0x2f8,
 	.fs_hcnt = 0x87,
 	.ss_lcnt = 0x37b,
 	.fs_lcnt = 0x10a,
 };

 /* BayTrail HCNT/LCNT/SDA hold time */
 static struct dw_scl_sda_cfg byt_config = {
 	.ss_hcnt = 0x200,
 	.fs_hcnt = 0x55,
 	.ss_lcnt = 0x200,
 	.fs_lcnt = 0x99,
 	.sda_hold = 0x6,
 };

 /* Haswell HCNT/LCNT/SDA hold time */
 static struct dw_scl_sda_cfg hsw_config = {
 	.ss_hcnt = 0x01b0,
 	.fs_hcnt = 0x48,
 	.ss_lcnt = 0x01fb,
 	.fs_lcnt = 0xa0,
 	.sda_hold = 0x9,
 };

 /* NAVI-AMD HCNT/LCNT/SDA hold time */
 static struct dw_scl_sda_cfg navi_amd_config = {
 	.ss_hcnt = 0x1ae,
 	.ss_lcnt = 0x23a,
 	.sda_hold = 0x9,
 };

 static u32 mfld_get_clk_rate_khz(struct dw_i2c_dev *dev)
 {
 	return 25000;
 }

 static u32 navi_amd_get_clk_rate_khz(struct dw_i2c_dev *dev)
 {
 	return AMD_CLK_RATE_HZ;
 }

 static int mfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
 {
 	struct dw_i2c_dev *dev = dev_get_drvdata(&pdev->dev);

 	switch (pdev->device) {
 	case 0x0817:
 		dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;
 		fallthrough;
 	case 0x0818:
 	case 0x0819:
 		c->bus_num = pdev->device - 0x817 + 3;
 		return 0;
 	case 0x082C:
 	case 0x082D:
 	case 0x082E:
 		c->bus_num = pdev->device - 0x82C + 0;
 		return 0;
 	}
 	return -ENODEV;
 }

  /*
   * TODO find a better way how to deduplicate instantiation
   * of USB PD slave device from nVidia GPU driver.
   */
 static int navi_amd_register_client(struct dw_i2c_dev *dev)
 {
 	struct i2c_board_info	info;

 	memset(&info, 0, sizeof(struct i2c_board_info));
 	strscpy(info.type, "ccgx-ucsi", I2C_NAME_SIZE);
 	info.addr = 0x08;
 	info.irq = dev->irq;

 	dev->slave = i2c_new_client_device(&dev->adapter, &info);
 	if (IS_ERR(dev->slave))
 		return PTR_ERR(dev->slave);

 	return 0;
 }

 static int navi_amd_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
 {
 	struct dw_i2c_dev *dev = dev_get_drvdata(&pdev->dev);

 	dev->flags |= MODEL_AMD_NAVI_GPU;
 	dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;
 	return 0;
 }

 static int mrfld_setup(struct pci_dev *pdev, struct dw_pci_controller *c)
 {
 	/*
 	 * On Intel Merrifield the user visible i2c buses are enumerated
 	 * [1..7]. So, we add 1 to shift the default range. Besides that the
 	 * first PCI slot provides 4 functions, that's why we have to add 0 to
 	 * the first slot and 4 to the next one.
 	 */
 	switch (PCI_SLOT(pdev->devfn)) {
 	case 8:
 		c->bus_num = PCI_FUNC(pdev->devfn) + 0 + 1;
 		return 0;
 	case 9:
 		c->bus_num = PCI_FUNC(pdev->devfn) + 4 + 1;
 		return 0;
 	}
 	return -ENODEV;
 }

 static u32 ehl_get_clk_rate_khz(struct dw_i2c_dev *dev)
 {
 	return 100000;
 }

 static struct dw_pci_controller dw_pci_controllers[] = {
 	[medfield] = {
 		.bus_num = -1,
 		.setup = mfld_setup,
 		.get_clk_rate_khz = mfld_get_clk_rate_khz,
 	},
 	[merrifield] = {
 		.bus_num = -1,
 		.scl_sda_cfg = &mrfld_config,
 		.setup = mrfld_setup,
 	},
 	[baytrail] = {
 		.bus_num = -1,
 		.scl_sda_cfg = &byt_config,
 	},
 	[haswell] = {
 		.bus_num = -1,
 		.scl_sda_cfg = &hsw_config,
 	},
 	[cherrytrail] = {
 		.bus_num = -1,
 		.scl_sda_cfg = &byt_config,
 	},
 	[elkhartlake] = {
 		.bus_num = -1,
 		.get_clk_rate_khz = ehl_get_clk_rate_khz,
 	},
 	[navi_amd] = {
 		.bus_num = -1,
 		.scl_sda_cfg = &navi_amd_config,
 		.setup =  navi_amd_setup,
 		.get_clk_rate_khz = navi_amd_get_clk_rate_khz,
 	},
 };

 #ifdef CONFIG_PM
 static int i2c_dw_pci_suspend(struct device *dev)
 {
 	struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);

 	i_dev->suspended = true;
 	i_dev->disable(i_dev);

 	return 0;
 }

 static int i2c_dw_pci_resume(struct device *dev)
 {
 	struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
 	int ret;

 	ret = i_dev->init(i_dev);
 	i_dev->suspended = false;

 	return ret;
 }
 #endif

 static UNIVERSAL_DEV_PM_OPS(i2c_dw_pm_ops, i2c_dw_pci_suspend,
 			    i2c_dw_pci_resume, NULL);

 static int i2c_dw_pci_probe(struct pci_dev *pdev,
 			    const struct pci_device_id *id)
 {
 	struct dw_i2c_dev *dev;
 	struct i2c_adapter *adap;
 	int r;
 	struct dw_pci_controller *controller;
 	struct dw_scl_sda_cfg *cfg;

 	if (id->driver_data >= ARRAY_SIZE(dw_pci_controllers)) {
 		dev_err(&pdev->dev, "%s: invalid driver data %ld\n", __func__,
 			id->driver_data);
 		return -EINVAL;
 	}

 	controller = &dw_pci_controllers[id->driver_data];

 	r = pcim_enable_device(pdev);
 	if (r) {
 		dev_err(&pdev->dev, "Failed to enable I2C PCI device (%d)\n",
 			r);
 		return r;
 	}

 	pci_set_master(pdev);

 	r = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
 	if (r) {
 		dev_err(&pdev->dev, "I/O memory remapping failed\n");
 		return r;
 	}

 	dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL);
 	if (!dev)
 		return -ENOMEM;

 	r = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
 	if (r < 0)
 		return r;

 	dev->get_clk_rate_khz = controller->get_clk_rate_khz;
 	dev->timings.bus_freq_hz = I2C_MAX_FAST_MODE_FREQ;
 	dev->base = pcim_iomap_table(pdev)[0];
 	dev->dev = &pdev->dev;
 	dev->irq = pci_irq_vector(pdev, 0);
 	dev->flags |= controller->flags;

 	pci_set_drvdata(pdev, dev);

 	if (controller->setup) {
 		r = controller->setup(pdev, controller);
 		if (r) {
 			pci_free_irq_vectors(pdev);
 			return r;
 		}
 	}

 	i2c_dw_adjust_bus_speed(dev);

 	if (has_acpi_companion(&pdev->dev))
 		i2c_dw_acpi_configure(&pdev->dev);

 	r = i2c_dw_validate_speed(dev);
 	if (r) {
 		pci_free_irq_vectors(pdev);
 		return r;
 	}

 	i2c_dw_configure(dev);

 	if (controller->scl_sda_cfg) {
 		cfg = controller->scl_sda_cfg;
 		dev->ss_hcnt = cfg->ss_hcnt;
 		dev->fs_hcnt = cfg->fs_hcnt;
 		dev->ss_lcnt = cfg->ss_lcnt;
 		dev->fs_lcnt = cfg->fs_lcnt;
 		dev->sda_hold_time = cfg->sda_hold;
 	}

 	adap = &dev->adapter;
 	adap->owner = THIS_MODULE;
 	adap->class = 0;
 	ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev));
 	adap->nr = controller->bus_num;

 	r = i2c_dw_probe(dev);
 	if (r) {
 		pci_free_irq_vectors(pdev);
 		return r;
 	}

 	if ((dev->flags & MODEL_MASK) == MODEL_AMD_NAVI_GPU) {
 		r = navi_amd_register_client(dev);
 		if (r) {
 			dev_err(dev->dev, "register client failed with %d\n", r);
 			return r;
 		}
 	}

 	pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
 	pm_runtime_use_autosuspend(&pdev->dev);
 	pm_runtime_put_autosuspend(&pdev->dev);
 	pm_runtime_allow(&pdev->dev);

 	return 0;
 }

 static void i2c_dw_pci_remove(struct pci_dev *pdev)
 {
 	struct dw_i2c_dev *dev = pci_get_drvdata(pdev);

 	dev->disable(dev);
 	pm_runtime_forbid(&pdev->dev);
 	pm_runtime_get_noresume(&pdev->dev);

 	i2c_del_adapter(&dev->adapter);
 	devm_free_irq(&pdev->dev, dev->irq, dev);
 	pci_free_irq_vectors(pdev);
 }

 /* work with hotplug and coldplug */
 MODULE_ALIAS("i2c_designware-pci");

 static const struct pci_device_id i2_designware_pci_ids[] = {
 	/* Medfield */
 	{ PCI_VDEVICE(INTEL, 0x0817), medfield },
 	{ PCI_VDEVICE(INTEL, 0x0818), medfield },
 	{ PCI_VDEVICE(INTEL, 0x0819), medfield },
 	{ PCI_VDEVICE(INTEL, 0x082C), medfield },
 	{ PCI_VDEVICE(INTEL, 0x082D), medfield },
 	{ PCI_VDEVICE(INTEL, 0x082E), medfield },
 	/* Merrifield */
 	{ PCI_VDEVICE(INTEL, 0x1195), merrifield },
 	{ PCI_VDEVICE(INTEL, 0x1196), merrifield },
 	/* Baytrail */
 	{ PCI_VDEVICE(INTEL, 0x0F41), baytrail },
 	{ PCI_VDEVICE(INTEL, 0x0F42), baytrail },
 	{ PCI_VDEVICE(INTEL, 0x0F43), baytrail },
 	{ PCI_VDEVICE(INTEL, 0x0F44), baytrail },
 	{ PCI_VDEVICE(INTEL, 0x0F45), baytrail },
 	{ PCI_VDEVICE(INTEL, 0x0F46), baytrail },
 	{ PCI_VDEVICE(INTEL, 0x0F47), baytrail },
 	/* Haswell */
 	{ PCI_VDEVICE(INTEL, 0x9c61), haswell },
 	{ PCI_VDEVICE(INTEL, 0x9c62), haswell },
 	/* Braswell / Cherrytrail */
 	{ PCI_VDEVICE(INTEL, 0x22C1), cherrytrail },
 	{ PCI_VDEVICE(INTEL, 0x22C2), cherrytrail },
 	{ PCI_VDEVICE(INTEL, 0x22C3), cherrytrail },
 	{ PCI_VDEVICE(INTEL, 0x22C4), cherrytrail },
 	{ PCI_VDEVICE(INTEL, 0x22C5), cherrytrail },
 	{ PCI_VDEVICE(INTEL, 0x22C6), cherrytrail },
 	{ PCI_VDEVICE(INTEL, 0x22C7), cherrytrail },
 	/* Elkhart Lake (PSE I2C) */
 	{ PCI_VDEVICE(INTEL, 0x4bb9), elkhartlake },
 	{ PCI_VDEVICE(INTEL, 0x4bba), elkhartlake },
 	{ PCI_VDEVICE(INTEL, 0x4bbb), elkhartlake },
 	{ PCI_VDEVICE(INTEL, 0x4bbc), elkhartlake },
 	{ PCI_VDEVICE(INTEL, 0x4bbd), elkhartlake },
 	{ PCI_VDEVICE(INTEL, 0x4bbe), elkhartlake },
 	{ PCI_VDEVICE(INTEL, 0x4bbf), elkhartlake },
 	{ PCI_VDEVICE(INTEL, 0x4bc0), elkhartlake },
 	{ PCI_VDEVICE(ATI,  0x7314), navi_amd },
 	{ PCI_VDEVICE(ATI,  0x73a4), navi_amd },
 	{ PCI_VDEVICE(ATI,  0x73e4), navi_amd },
 	{ PCI_VDEVICE(ATI,  0x73c4), navi_amd },
 	{ 0,}
 };
 MODULE_DEVICE_TABLE(pci, i2_designware_pci_ids);

 static struct pci_driver dw_i2c_driver = {
 	.name		= DRIVER_NAME,
 	.id_table	= i2_designware_pci_ids,
 	.probe		= i2c_dw_pci_probe,
 	.remove		= i2c_dw_pci_remove,
 	.driver         = {
 		.pm     = &i2c_dw_pm_ops,
 	},
 };

 module_pci_driver(dw_i2c_driver);

 MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
 MODULE_DESCRIPTION("Synopsys DesignWare PCI I2C bus adapter");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Synopsys DesignWare I2C adapter driver (master only).
	*
	* Based on the TI DAVINCI I2C adapter driver.
	*
	* Copyright (C) 2006 Texas Instruments.
	* Copyright (C) 2007 MontaVista Software Inc.
	* Copyright (C) 2009 Provigent Ltd.
	* Copyright (C) 2011, 2015, 2016 Intel Corporation.
	*/
	#include <linux/acpi.h>
	#include <linux/delay.h>
	#include <linux/err.h>
	#include <linux/errno.h>
	#include <linux/i2c.h>
	#include <linux/interrupt.h>
	#include <linux/io.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/pci.h>
	#include <linux/pm_runtime.h>
	#include <linux/sched.h>
	#include <linux/slab.h>

	#include "i2c-designware-core.h"

	#define DRIVER_NAME "i2c-designware-pci"
	#define AMD_CLK_RATE_HZ 100000

	enum dw_pci_ctl_id_t {
	medfield,
	merrifield,
	baytrail,
	cherrytrail,
	haswell,
	elkhartlake,
	navi_amd,
	};

	struct dw_scl_sda_cfg {
	u32 ss_hcnt;
	u32 fs_hcnt;
	u32 ss_lcnt;
	u32 fs_lcnt;
	u32 sda_hold;
	};

	struct dw_pci_controller {
	u32 bus_num;
	u32 flags;
	struct dw_scl_sda_cfg *scl_sda_cfg;
	int (setup)(struct pci_dev pdev, struct dw_pci_controller *c);
	u32 (get_clk_rate_khz)(struct dw_i2c_dev dev);
	};

	/* Merrifield HCNT/LCNT/SDA hold time */
	static struct dw_scl_sda_cfg mrfld_config = {
	.ss_hcnt = 0x2f8,
	.fs_hcnt = 0x87,
	.ss_lcnt = 0x37b,
	.fs_lcnt = 0x10a,
	};

	/* BayTrail HCNT/LCNT/SDA hold time */
	static struct dw_scl_sda_cfg byt_config = {
	.ss_hcnt = 0x200,
	.fs_hcnt = 0x55,
	.ss_lcnt = 0x200,
	.fs_lcnt = 0x99,
	.sda_hold = 0x6,
	};

	/* Haswell HCNT/LCNT/SDA hold time */
	static struct dw_scl_sda_cfg hsw_config = {
	.ss_hcnt = 0x01b0,
	.fs_hcnt = 0x48,
	.ss_lcnt = 0x01fb,
	.fs_lcnt = 0xa0,
	.sda_hold = 0x9,
	};

	/* NAVI-AMD HCNT/LCNT/SDA hold time */
	static struct dw_scl_sda_cfg navi_amd_config = {
	.ss_hcnt = 0x1ae,
	.ss_lcnt = 0x23a,
	.sda_hold = 0x9,
	};

	static u32 mfld_get_clk_rate_khz(struct dw_i2c_dev *dev)
	{
	return 25000;
	}

	static u32 navi_amd_get_clk_rate_khz(struct dw_i2c_dev *dev)
	{
	return AMD_CLK_RATE_HZ;
	}

	static int mfld_setup(struct pci_dev pdev, struct dw_pci_controller c)
	{
	struct dw_i2c_dev *dev = dev_get_drvdata(&pdev->dev);

	switch (pdev->device) {
	case 0x0817:
	dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;
	fallthrough;
	case 0x0818:
	case 0x0819:
	c->bus_num = pdev->device - 0x817 + 3;
	return 0;
	case 0x082C:
	case 0x082D:
	case 0x082E:
	c->bus_num = pdev->device - 0x82C + 0;
	return 0;
	}
	return -ENODEV;
	}

	/*
	* TODO find a better way how to deduplicate instantiation
	* of USB PD slave device from nVidia GPU driver.
	*/
	static int navi_amd_register_client(struct dw_i2c_dev *dev)
	{
	struct i2c_board_info info;

	memset(&info, 0, sizeof(struct i2c_board_info));
	strscpy(info.type, "ccgx-ucsi", I2C_NAME_SIZE);
	info.addr = 0x08;
	info.irq = dev->irq;

	dev->slave = i2c_new_client_device(&dev->adapter, &info);
	if (IS_ERR(dev->slave))
	return PTR_ERR(dev->slave);

	return 0;
	}

	static int navi_amd_setup(struct pci_dev pdev, struct dw_pci_controller c)
	{
	struct dw_i2c_dev *dev = dev_get_drvdata(&pdev->dev);

	dev->flags \|= MODEL_AMD_NAVI_GPU;
	dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;
	return 0;
	}

	static int mrfld_setup(struct pci_dev pdev, struct dw_pci_controller c)
	{
	/*
	* On Intel Merrifield the user visible i2c buses are enumerated
	* [1..7]. So, we add 1 to shift the default range. Besides that the
	* first PCI slot provides 4 functions, that's why we have to add 0 to
	* the first slot and 4 to the next one.
	*/
	switch (PCI_SLOT(pdev->devfn)) {
	case 8:
	c->bus_num = PCI_FUNC(pdev->devfn) + 0 + 1;
	return 0;
	case 9:
	c->bus_num = PCI_FUNC(pdev->devfn) + 4 + 1;
	return 0;
	}
	return -ENODEV;
	}

	static u32 ehl_get_clk_rate_khz(struct dw_i2c_dev *dev)
	{
	return 100000;
	}

	static struct dw_pci_controller dw_pci_controllers[] = {
	[medfield] = {
	.bus_num = -1,
	.setup = mfld_setup,
	.get_clk_rate_khz = mfld_get_clk_rate_khz,
	},
	[merrifield] = {
	.bus_num = -1,
	.scl_sda_cfg = &mrfld_config,
	.setup = mrfld_setup,
	},
	[baytrail] = {
	.bus_num = -1,
	.scl_sda_cfg = &byt_config,
	},
	[haswell] = {
	.bus_num = -1,
	.scl_sda_cfg = &hsw_config,
	},
	[cherrytrail] = {
	.bus_num = -1,
	.scl_sda_cfg = &byt_config,
	},
	[elkhartlake] = {
	.bus_num = -1,
	.get_clk_rate_khz = ehl_get_clk_rate_khz,
	},
	[navi_amd] = {
	.bus_num = -1,
	.scl_sda_cfg = &navi_amd_config,
	.setup = navi_amd_setup,
	.get_clk_rate_khz = navi_amd_get_clk_rate_khz,
	},
	};

	#ifdef CONFIG_PM
	static int i2c_dw_pci_suspend(struct device *dev)
	{
	struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);

	i_dev->suspended = true;
	i_dev->disable(i_dev);

	return 0;
	}

	static int i2c_dw_pci_resume(struct device *dev)
	{
	struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
	int ret;

	ret = i_dev->init(i_dev);
	i_dev->suspended = false;

	return ret;
	}
	#endif

	static UNIVERSAL_DEV_PM_OPS(i2c_dw_pm_ops, i2c_dw_pci_suspend,
	i2c_dw_pci_resume, NULL);

	static int i2c_dw_pci_probe(struct pci_dev *pdev,
	const struct pci_device_id *id)
	{
	struct dw_i2c_dev *dev;
	struct i2c_adapter *adap;
	int r;
	struct dw_pci_controller *controller;
	struct dw_scl_sda_cfg *cfg;

	if (id->driver_data >= ARRAY_SIZE(dw_pci_controllers)) {
	dev_err(&pdev->dev, "%s: invalid driver data %ld\n", __func__,
	id->driver_data);
	return -EINVAL;
	}

	controller = &dw_pci_controllers[id->driver_data];

	r = pcim_enable_device(pdev);
	if (r) {
	dev_err(&pdev->dev, "Failed to enable I2C PCI device (%d)\n",
	r);
	return r;
	}

	pci_set_master(pdev);

	r = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
	if (r) {
	dev_err(&pdev->dev, "I/O memory remapping failed\n");
	return r;
	}

	dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL);
	if (!dev)
	return -ENOMEM;

	r = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
	if (r < 0)
	return r;

	dev->get_clk_rate_khz = controller->get_clk_rate_khz;
	dev->timings.bus_freq_hz = I2C_MAX_FAST_MODE_FREQ;
	dev->base = pcim_iomap_table(pdev)[0];
	dev->dev = &pdev->dev;
	dev->irq = pci_irq_vector(pdev, 0);
	dev->flags \|= controller->flags;

	pci_set_drvdata(pdev, dev);

	if (controller->setup) {
	r = controller->setup(pdev, controller);
	if (r) {
	pci_free_irq_vectors(pdev);
	return r;
	}
	}

	i2c_dw_adjust_bus_speed(dev);

	if (has_acpi_companion(&pdev->dev))
	i2c_dw_acpi_configure(&pdev->dev);

	r = i2c_dw_validate_speed(dev);
	if (r) {
	pci_free_irq_vectors(pdev);
	return r;
	}

	i2c_dw_configure(dev);

	if (controller->scl_sda_cfg) {
	cfg = controller->scl_sda_cfg;
	dev->ss_hcnt = cfg->ss_hcnt;
	dev->fs_hcnt = cfg->fs_hcnt;
	dev->ss_lcnt = cfg->ss_lcnt;
	dev->fs_lcnt = cfg->fs_lcnt;
	dev->sda_hold_time = cfg->sda_hold;
	}

	adap = &dev->adapter;
	adap->owner = THIS_MODULE;
	adap->class = 0;
	ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev));
	adap->nr = controller->bus_num;

	r = i2c_dw_probe(dev);
	if (r) {
	pci_free_irq_vectors(pdev);
	return r;
	}

	if ((dev->flags & MODEL_MASK) == MODEL_AMD_NAVI_GPU) {
	r = navi_amd_register_client(dev);
	if (r) {
	dev_err(dev->dev, "register client failed with %d\n", r);
	return r;
	}
	}

	pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
	pm_runtime_use_autosuspend(&pdev->dev);
	pm_runtime_put_autosuspend(&pdev->dev);
	pm_runtime_allow(&pdev->dev);

	return 0;
	}

	static void i2c_dw_pci_remove(struct pci_dev *pdev)
	{
	struct dw_i2c_dev *dev = pci_get_drvdata(pdev);

	dev->disable(dev);
	pm_runtime_forbid(&pdev->dev);
	pm_runtime_get_noresume(&pdev->dev);

	i2c_del_adapter(&dev->adapter);
	devm_free_irq(&pdev->dev, dev->irq, dev);
	pci_free_irq_vectors(pdev);
	}

	/* work with hotplug and coldplug */
	MODULE_ALIAS("i2c_designware-pci");

	static const struct pci_device_id i2_designware_pci_ids[] = {
	/* Medfield */
	{ PCI_VDEVICE(INTEL, 0x0817), medfield },
	{ PCI_VDEVICE(INTEL, 0x0818), medfield },
	{ PCI_VDEVICE(INTEL, 0x0819), medfield },
	{ PCI_VDEVICE(INTEL, 0x082C), medfield },
	{ PCI_VDEVICE(INTEL, 0x082D), medfield },
	{ PCI_VDEVICE(INTEL, 0x082E), medfield },
	/* Merrifield */
	{ PCI_VDEVICE(INTEL, 0x1195), merrifield },
	{ PCI_VDEVICE(INTEL, 0x1196), merrifield },
	/* Baytrail */
	{ PCI_VDEVICE(INTEL, 0x0F41), baytrail },
	{ PCI_VDEVICE(INTEL, 0x0F42), baytrail },
	{ PCI_VDEVICE(INTEL, 0x0F43), baytrail },
	{ PCI_VDEVICE(INTEL, 0x0F44), baytrail },
	{ PCI_VDEVICE(INTEL, 0x0F45), baytrail },
	{ PCI_VDEVICE(INTEL, 0x0F46), baytrail },
	{ PCI_VDEVICE(INTEL, 0x0F47), baytrail },
	/* Haswell */
	{ PCI_VDEVICE(INTEL, 0x9c61), haswell },
	{ PCI_VDEVICE(INTEL, 0x9c62), haswell },
	/* Braswell / Cherrytrail */
	{ PCI_VDEVICE(INTEL, 0x22C1), cherrytrail },
	{ PCI_VDEVICE(INTEL, 0x22C2), cherrytrail },
	{ PCI_VDEVICE(INTEL, 0x22C3), cherrytrail },
	{ PCI_VDEVICE(INTEL, 0x22C4), cherrytrail },
	{ PCI_VDEVICE(INTEL, 0x22C5), cherrytrail },
	{ PCI_VDEVICE(INTEL, 0x22C6), cherrytrail },
	{ PCI_VDEVICE(INTEL, 0x22C7), cherrytrail },
	/* Elkhart Lake (PSE I2C) */
	{ PCI_VDEVICE(INTEL, 0x4bb9), elkhartlake },
	{ PCI_VDEVICE(INTEL, 0x4bba), elkhartlake },
	{ PCI_VDEVICE(INTEL, 0x4bbb), elkhartlake },
	{ PCI_VDEVICE(INTEL, 0x4bbc), elkhartlake },
	{ PCI_VDEVICE(INTEL, 0x4bbd), elkhartlake },
	{ PCI_VDEVICE(INTEL, 0x4bbe), elkhartlake },
	{ PCI_VDEVICE(INTEL, 0x4bbf), elkhartlake },
	{ PCI_VDEVICE(INTEL, 0x4bc0), elkhartlake },
	{ PCI_VDEVICE(ATI, 0x7314), navi_amd },
	{ PCI_VDEVICE(ATI, 0x73a4), navi_amd },
	{ PCI_VDEVICE(ATI, 0x73e4), navi_amd },
	{ PCI_VDEVICE(ATI, 0x73c4), navi_amd },
	{ 0,}
	};
	MODULE_DEVICE_TABLE(pci, i2_designware_pci_ids);

	static struct pci_driver dw_i2c_driver = {
	.name = DRIVER_NAME,
	.id_table = i2_designware_pci_ids,
	.probe = i2c_dw_pci_probe,
	.remove = i2c_dw_pci_remove,
	.driver = {
	.pm = &i2c_dw_pm_ops,
	},
	};

	module_pci_driver(dw_i2c_driver);

	MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
	MODULE_DESCRIPTION("Synopsys DesignWare PCI I2C bus adapter");
	MODULE_LICENSE("GPL");