[linux-block.git] / drivers / char / tpm / tpm_tis.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2005, 2006 IBM Corporation
 * Copyright (C) 2014, 2015 Intel Corporation
 *
 * Authors:
 * Leendert van Doorn <leendert@watson.ibm.com>
 * Kylene Hall <kjhall@us.ibm.com>
 *
 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
 *
 * Device driver for TCG/TCPA TPM (trusted platform module).
 * Specifications at www.trustedcomputinggroup.org
 *
 * This device driver implements the TPM interface as defined in
 * the TCG TPM Interface Spec version 1.2, revision 1.0.
 */
#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/pnp.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/acpi.h>
#include <linux/freezer.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/kernel.h>
#include <linux/dmi.h>
#include "tpm.h"
#include "tpm_tis_core.h"

struct tpm_info {
	struct resource res;
	/* irq > 0 means: use irq $irq;
	 * irq = 0 means: autoprobe for an irq;
	 * irq = -1 means: no irq support
	 */
	int irq;
};

struct tpm_tis_tcg_phy {
	struct tpm_tis_data priv;
	void __iomem *iobase;
};

static inline struct tpm_tis_tcg_phy *to_tpm_tis_tcg_phy(struct tpm_tis_data *data)
{
	return container_of(data, struct tpm_tis_tcg_phy, priv);
}

static int interrupts = -1;
module_param(interrupts, int, 0444);
MODULE_PARM_DESC(interrupts, "Enable interrupts");

static bool itpm;
module_param(itpm, bool, 0444);
MODULE_PARM_DESC(itpm, "Force iTPM workarounds (found on some Lenovo laptops)");

static bool force;
#ifdef CONFIG_X86
module_param(force, bool, 0444);
MODULE_PARM_DESC(force, "Force device probe rather than using ACPI entry");
#endif

static int tpm_tis_disable_irq(const struct dmi_system_id *d)
{
	if (interrupts == -1) {
		pr_notice("tpm_tis: %s detected: disabling interrupts.\n", d->ident);
		interrupts = 0;
	}

	return 0;
}

static const struct dmi_system_id tpm_tis_dmi_table[] = {
	{
		.callback = tpm_tis_disable_irq,
		.ident = "ThinkPad T490s",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T490s"),
		},
	},
	{}
};

#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
static int has_hid(struct acpi_device *dev, const char *hid)
{
	struct acpi_hardware_id *id;

	list_for_each_entry(id, &dev->pnp.ids, list)
		if (!strcmp(hid, id->id))
			return 1;

	return 0;
}

static inline int is_itpm(struct acpi_device *dev)
{
	if (!dev)
		return 0;
	return has_hid(dev, "INTC0102");
}
#else
static inline int is_itpm(struct acpi_device *dev)
{
	return 0;
}
#endif

#if defined(CONFIG_ACPI)
#define DEVICE_IS_TPM2 1

static const struct acpi_device_id tpm_acpi_tbl[] = {
	{"MSFT0101", DEVICE_IS_TPM2},
	{},
};
MODULE_DEVICE_TABLE(acpi, tpm_acpi_tbl);

static int check_acpi_tpm2(struct device *dev)
{
	const struct acpi_device_id *aid = acpi_match_device(tpm_acpi_tbl, dev);
	struct acpi_table_tpm2 *tbl;
	acpi_status st;

	if (!aid || aid->driver_data != DEVICE_IS_TPM2)
		return 0;

	/* If the ACPI TPM2 signature is matched then a global ACPI_SIG_TPM2
	 * table is mandatory
	 */
	st =
	    acpi_get_table(ACPI_SIG_TPM2, 1, (struct acpi_table_header **)&tbl);
	if (ACPI_FAILURE(st) || tbl->header.length < sizeof(*tbl)) {
		dev_err(dev, FW_BUG "failed to get TPM2 ACPI table\n");
		return -EINVAL;
	}

	/* The tpm2_crb driver handles this device */
	if (tbl->start_method != ACPI_TPM2_MEMORY_MAPPED)
		return -ENODEV;

	return 0;
}
#else
static int check_acpi_tpm2(struct device *dev)
{
	return 0;
}
#endif

static int tpm_tcg_read_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
			      u8 *result, enum tpm_tis_io_mode io_mode)
{
	struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);
	__le16 result_le16;
	__le32 result_le32;

	switch (io_mode) {
	case TPM_TIS_PHYS_8:
		while (len--)
			*result++ = ioread8(phy->iobase + addr);
		break;
	case TPM_TIS_PHYS_16:
		result_le16 = cpu_to_le16(ioread16(phy->iobase + addr));
		memcpy(result, &result_le16, sizeof(u16));
		break;
	case TPM_TIS_PHYS_32:
		result_le32 = cpu_to_le32(ioread32(phy->iobase + addr));
		memcpy(result, &result_le32, sizeof(u32));
		break;
	}

	return 0;
}

static int tpm_tcg_write_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
			       const u8 *value, enum tpm_tis_io_mode io_mode)
{
	struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);

	switch (io_mode) {
	case TPM_TIS_PHYS_8:
		while (len--)
			iowrite8(*value++, phy->iobase + addr);
		break;
	case TPM_TIS_PHYS_16:
		return -EINVAL;
	case TPM_TIS_PHYS_32:
		iowrite32(le32_to_cpu(*((__le32 *)value)), phy->iobase + addr);
		break;
	}

	return 0;
}

static const struct tpm_tis_phy_ops tpm_tcg = {
	.read_bytes = tpm_tcg_read_bytes,
	.write_bytes = tpm_tcg_write_bytes,
};

static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info)
{
	struct tpm_tis_tcg_phy *phy;
	int irq = -1;
	int rc;

	dmi_check_system(tpm_tis_dmi_table);

	rc = check_acpi_tpm2(dev);
	if (rc)
		return rc;

	phy = devm_kzalloc(dev, sizeof(struct tpm_tis_tcg_phy), GFP_KERNEL);
	if (phy == NULL)
		return -ENOMEM;

	phy->iobase = devm_ioremap_resource(dev, &tpm_info->res);
	if (IS_ERR(phy->iobase))
		return PTR_ERR(phy->iobase);

	if (interrupts)
		irq = tpm_info->irq;

	if (itpm || is_itpm(ACPI_COMPANION(dev)))
		phy->priv.flags |= TPM_TIS_ITPM_WORKAROUND;

	return tpm_tis_core_init(dev, &phy->priv, irq, &tpm_tcg,
				 ACPI_HANDLE(dev));
}

static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_resume);

static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
			    const struct pnp_device_id *pnp_id)
{
	struct tpm_info tpm_info = {};
	struct resource *res;

	res = pnp_get_resource(pnp_dev, IORESOURCE_MEM, 0);
	if (!res)
		return -ENODEV;
	tpm_info.res = *res;

	if (pnp_irq_valid(pnp_dev, 0))
		tpm_info.irq = pnp_irq(pnp_dev, 0);
	else
		tpm_info.irq = -1;

	return tpm_tis_init(&pnp_dev->dev, &tpm_info);
}

/*
 * There is a known bug caused by 93e1b7d42e1e ("[PATCH] tpm: add HID module
 * parameter"). This commit added IFX0102 device ID, which is also used by
 * tpm_infineon but ignored to add quirks to probe which driver ought to be
 * used.
 */

static struct pnp_device_id tpm_pnp_tbl[] = {
	{"PNP0C31", 0},		/* TPM */
	{"ATM1200", 0},		/* Atmel */
	{"IFX0102", 0},		/* Infineon */
	{"BCM0101", 0},		/* Broadcom */
	{"BCM0102", 0},		/* Broadcom */
	{"NSC1200", 0},		/* National */
	{"ICO0102", 0},		/* Intel */
	/* Add new here */
	{"", 0},		/* User Specified */
	{"", 0}			/* Terminator */
};
MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);

static void tpm_tis_pnp_remove(struct pnp_dev *dev)
{
	struct tpm_chip *chip = pnp_get_drvdata(dev);

	tpm_chip_unregister(chip);
	tpm_tis_remove(chip);
}

static struct pnp_driver tis_pnp_driver = {
	.name = "tpm_tis",
	.id_table = tpm_pnp_tbl,
	.probe = tpm_tis_pnp_init,
	.remove = tpm_tis_pnp_remove,
	.driver	= {
		.pm = &tpm_tis_pm,
	},
};

#define TIS_HID_USR_IDX (ARRAY_SIZE(tpm_pnp_tbl) - 2)
module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
		    sizeof(tpm_pnp_tbl[TIS_HID_USR_IDX].id), 0444);
MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");

static struct platform_device *force_pdev;

static int tpm_tis_plat_probe(struct platform_device *pdev)
{
	struct tpm_info tpm_info = {};
	struct resource *res;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "no memory resource defined\n");
		return -ENODEV;
	}
	tpm_info.res = *res;

	tpm_info.irq = platform_get_irq_optional(pdev, 0);
	if (tpm_info.irq <= 0) {
		if (pdev != force_pdev)
			tpm_info.irq = -1;
		else
			/* When forcing auto probe the IRQ */
			tpm_info.irq = 0;
	}

	return tpm_tis_init(&pdev->dev, &tpm_info);
}

static int tpm_tis_plat_remove(struct platform_device *pdev)
{
	struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);

	tpm_chip_unregister(chip);
	tpm_tis_remove(chip);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id tis_of_platform_match[] = {
	{.compatible = "tcg,tpm-tis-mmio"},
	{},
};
MODULE_DEVICE_TABLE(of, tis_of_platform_match);
#endif

static struct platform_driver tis_drv = {
	.probe = tpm_tis_plat_probe,
	.remove = tpm_tis_plat_remove,
	.driver = {
		.name		= "tpm_tis",
		.pm		= &tpm_tis_pm,
		.of_match_table = of_match_ptr(tis_of_platform_match),
		.acpi_match_table = ACPI_PTR(tpm_acpi_tbl),
	},
};

static int tpm_tis_force_device(void)
{
	struct platform_device *pdev;
	static const struct resource x86_resources[] = {
		DEFINE_RES_MEM(0xFED40000, TIS_MEM_LEN)
	};

	if (!force)
		return 0;

	/* The driver core will match the name tpm_tis of the device to
	 * the tpm_tis platform driver and complete the setup via
	 * tpm_tis_plat_probe
	 */
	pdev = platform_device_register_simple("tpm_tis", -1, x86_resources,
					       ARRAY_SIZE(x86_resources));
	if (IS_ERR(pdev))
		return PTR_ERR(pdev);
	force_pdev = pdev;

	return 0;
}

static int __init init_tis(void)
{
	int rc;

	rc = tpm_tis_force_device();
	if (rc)
		goto err_force;

	rc = platform_driver_register(&tis_drv);
	if (rc)
		goto err_platform;


	if (IS_ENABLED(CONFIG_PNP)) {
		rc = pnp_register_driver(&tis_pnp_driver);
		if (rc)
			goto err_pnp;
	}

	return 0;

err_pnp:
	platform_driver_unregister(&tis_drv);
err_platform:
	if (force_pdev)
		platform_device_unregister(force_pdev);
err_force:
	return rc;
}

static void __exit cleanup_tis(void)
{
	pnp_unregister_driver(&tis_pnp_driver);
	platform_driver_unregister(&tis_drv);

	if (force_pdev)
		platform_device_unregister(force_pdev);
}

module_init(init_tis);
module_exit(cleanup_tis);
MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
MODULE_DESCRIPTION("TPM Driver");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");
Commit	Line	Data
b886d83c	1	// SPDX-License-Identifier: GPL-2.0-only
27084efe LD	2	/*
27084efe LD	3	* Copyright (C) 2005, 2006 IBM Corporation
399235dc	4	* Copyright (C) 2014, 2015 Intel Corporation
27084efe LD	5	*
	6	* Authors:
	7	* Leendert van Doorn <leendert@watson.ibm.com>
	8	* Kylene Hall <kjhall@us.ibm.com>
	9	*
8e81cc13 KY	10	* Maintained by: <tpmdd-devel@lists.sourceforge.net>
8e81cc13 KY	11	*
27084efe LD	12	* Device driver for TCG/TCPA TPM (trusted platform module).
	13	* Specifications at www.trustedcomputinggroup.org
	14	*
	15	* This device driver implements the TPM interface as defined in
	16	* the TCG TPM Interface Spec version 1.2, revision 1.0.
27084efe	17	*/
57135568 KJH	18	#include <linux/init.h>
	19	#include <linux/module.h>
	20	#include <linux/moduleparam.h>
27084efe	21	#include <linux/pnp.h>
5a0e3ad6	22	#include <linux/slab.h>
27084efe LD	23	#include <linux/interrupt.h>
27084efe LD	24	#include <linux/wait.h>
3f0d3d01	25	#include <linux/acpi.h>
20b87bbf	26	#include <linux/freezer.h>
420d4398 JG	27	#include <linux/of.h>
420d4398 JG	28	#include <linux/of_device.h>
33957a10	29	#include <linux/kernel.h>
b154ce11	30	#include <linux/dmi.h>
27084efe	31	#include "tpm.h"
57dacc2b	32	#include "tpm_tis_core.h"
27084efe	33
399235dc	34	struct tpm_info {
51dd43df	35	struct resource res;
ef7b81dc JG	36	/* irq > 0 means: use irq $irq;
	37	* irq = 0 means: autoprobe for an irq;
	38	* irq = -1 means: no irq support
	39	*/
	40	int irq;
399235dc JS	41	};
399235dc JS	42
57dacc2b CR	43	struct tpm_tis_tcg_phy {
57dacc2b CR	44	struct tpm_tis_data priv;
4eea703c	45	void __iomem *iobase;
448e9c55 SD	46	};
448e9c55 SD	47
57dacc2b CR	48	static inline struct tpm_tis_tcg_phy to_tpm_tis_tcg_phy(struct tpm_tis_data data)
	49	{
	50	return container_of(data, struct tpm_tis_tcg_phy, priv);
	51	}
	52
b154ce11 JS	53	static int interrupts = -1;
b154ce11 JS	54	module_param(interrupts, int, 0444);
41a5e1cf CR	55	MODULE_PARM_DESC(interrupts, "Enable interrupts");
	56
	57	static bool itpm;
	58	module_param(itpm, bool, 0444);
	59	MODULE_PARM_DESC(itpm, "Force iTPM workarounds (found on some Lenovo laptops)");
	60
	61	static bool force;
	62	#ifdef CONFIG_X86
	63	module_param(force, bool, 0444);
	64	MODULE_PARM_DESC(force, "Force device probe rather than using ACPI entry");
	65	#endif
	66
b154ce11 JS	67	static int tpm_tis_disable_irq(const struct dmi_system_id *d)
	68	{
	69	if (interrupts == -1) {
	70	pr_notice("tpm_tis: %s detected: disabling interrupts.\n", d->ident);
	71	interrupts = 0;
	72	}
	73
	74	return 0;
	75	}
	76
	77	static const struct dmi_system_id tpm_tis_dmi_table[] = {
	78	{
	79	.callback = tpm_tis_disable_irq,
	80	.ident = "ThinkPad T490s",
	81	.matches = {
	82	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	83	DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T490s"),
	84	},
	85	},
	86	{}
	87	};
	88
1560ffe6	89	#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
399235dc	90	static int has_hid(struct acpi_device dev, const char hid)
3f0d3d01	91	{
3f0d3d01 MG	92	struct acpi_hardware_id *id;
3f0d3d01 MG	93
399235dc JS	94	list_for_each_entry(id, &dev->pnp.ids, list)
399235dc JS	95	if (!strcmp(hid, id->id))
3f0d3d01	96	return 1;
3f0d3d01 MG	97
	98	return 0;
	99	}
399235dc JS	100
	101	static inline int is_itpm(struct acpi_device *dev)
	102	{
4cb586a1 JG	103	if (!dev)
4cb586a1 JG	104	return 0;
399235dc JS	105	return has_hid(dev, "INTC0102");
399235dc JS	106	}
1560ffe6	107	#else
399235dc	108	static inline int is_itpm(struct acpi_device *dev)
1560ffe6 RD	109	{
	110	return 0;
	111	}
3f0d3d01 MG	112	#endif
3f0d3d01 MG	113
4cb586a1 JG	114	#if defined(CONFIG_ACPI)
	115	#define DEVICE_IS_TPM2 1
	116
	117	static const struct acpi_device_id tpm_acpi_tbl[] = {
	118	{"MSFT0101", DEVICE_IS_TPM2},
	119	{},
	120	};
	121	MODULE_DEVICE_TABLE(acpi, tpm_acpi_tbl);
	122
	123	static int check_acpi_tpm2(struct device *dev)
	124	{
	125	const struct acpi_device_id *aid = acpi_match_device(tpm_acpi_tbl, dev);
	126	struct acpi_table_tpm2 *tbl;
	127	acpi_status st;
	128
	129	if (!aid \|\| aid->driver_data != DEVICE_IS_TPM2)
	130	return 0;
	131
	132	/* If the ACPI TPM2 signature is matched then a global ACPI_SIG_TPM2
	133	* table is mandatory
	134	*/
	135	st =
	136	acpi_get_table(ACPI_SIG_TPM2, 1, (struct acpi_table_header **)&tbl);
	137	if (ACPI_FAILURE(st) \|\| tbl->header.length < sizeof(*tbl)) {
	138	dev_err(dev, FW_BUG "failed to get TPM2 ACPI table\n");
	139	return -EINVAL;
	140	}
	141
	142	/* The tpm2_crb driver handles this device */
	143	if (tbl->start_method != ACPI_TPM2_MEMORY_MAPPED)
	144	return -ENODEV;
	145
	146	return 0;
	147	}
	148	#else
	149	static int check_acpi_tpm2(struct device *dev)
	150	{
	151	return 0;
	152	}
	153	#endif
	154
1107d065	155	static int tpm_tcg_read_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
6422cbd3	156	u8 *result, enum tpm_tis_io_mode io_mode)
1107d065 CR	157	{
1107d065 CR	158	struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);
6422cbd3 JH	159	__le16 result_le16;
	160	__le32 result_le32;
	161
	162	switch (io_mode) {
	163	case TPM_TIS_PHYS_8:
	164	while (len--)
	165	*result++ = ioread8(phy->iobase + addr);
	166	break;
	167	case TPM_TIS_PHYS_16:
	168	result_le16 = cpu_to_le16(ioread16(phy->iobase + addr));
	169	memcpy(result, &result_le16, sizeof(u16));
	170	break;
	171	case TPM_TIS_PHYS_32:
	172	result_le32 = cpu_to_le32(ioread32(phy->iobase + addr));
	173	memcpy(result, &result_le32, sizeof(u32));
	174	break;
	175	}
5e572cab	176
1107d065 CR	177	return 0;
	178	}
	179
	180	static int tpm_tcg_write_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
6422cbd3	181	const u8 *value, enum tpm_tis_io_mode io_mode)
1107d065 CR	182	{
	183	struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);
	184
6422cbd3 JH	185	switch (io_mode) {
	186	case TPM_TIS_PHYS_8:
	187	while (len--)
	188	iowrite8(*value++, phy->iobase + addr);
	189	break;
	190	case TPM_TIS_PHYS_16:
	191	return -EINVAL;
	192	case TPM_TIS_PHYS_32:
	193	iowrite32(le32_to_cpu(((__le32 )value)), phy->iobase + addr);
	194	break;
	195	}
5e572cab	196
1107d065 CR	197	return 0;
	198	}
	199
	200	static const struct tpm_tis_phy_ops tpm_tcg = {
	201	.read_bytes = tpm_tcg_read_bytes,
	202	.write_bytes = tpm_tcg_write_bytes,
1107d065 CR	203	};
1107d065 CR	204
4cb586a1	205	static int tpm_tis_init(struct device dev, struct tpm_info tpm_info)
27084efe	206	{
57dacc2b	207	struct tpm_tis_tcg_phy *phy;
41a5e1cf	208	int irq = -1;
4cb586a1 JG	209	int rc;
4cb586a1 JG	210
b154ce11 JS	211	dmi_check_system(tpm_tis_dmi_table);
b154ce11 JS	212
4cb586a1 JG	213	rc = check_acpi_tpm2(dev);
	214	if (rc)
	215	return rc;
27084efe	216
57dacc2b CR	217	phy = devm_kzalloc(dev, sizeof(struct tpm_tis_tcg_phy), GFP_KERNEL);
57dacc2b CR	218	if (phy == NULL)
448e9c55	219	return -ENOMEM;
afb5abc2	220
57dacc2b CR	221	phy->iobase = devm_ioremap_resource(dev, &tpm_info->res);
	222	if (IS_ERR(phy->iobase))
	223	return PTR_ERR(phy->iobase);
27084efe	224
41a5e1cf CR	225	if (interrupts)
41a5e1cf CR	226	irq = tpm_info->irq;
9519de3f	227
4cb586a1	228	if (itpm \|\| is_itpm(ACPI_COMPANION(dev)))
1d70fe9d	229	phy->priv.flags \|= TPM_TIS_ITPM_WORKAROUND;
25112048	230
41a5e1cf	231	return tpm_tis_core_init(dev, &phy->priv, irq, &tpm_tcg,
4cb586a1	232	ACPI_HANDLE(dev));
27084efe	233	}
96854310	234
a2fa3fb0 SK	235	static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_resume);
a2fa3fb0 SK	236
afc6d369	237	static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
ef7b81dc	238	const struct pnp_device_id *pnp_id)
9e323d3e	239	{
ef7b81dc	240	struct tpm_info tpm_info = {};
51dd43df	241	struct resource *res;
7917ff9a	242
51dd43df JG	243	res = pnp_get_resource(pnp_dev, IORESOURCE_MEM, 0);
	244	if (!res)
	245	return -ENODEV;
	246	tpm_info.res = *res;
9e323d3e	247
7917ff9a	248	if (pnp_irq_valid(pnp_dev, 0))
399235dc	249	tpm_info.irq = pnp_irq(pnp_dev, 0);
7917ff9a	250	else
ef7b81dc	251	tpm_info.irq = -1;
7917ff9a	252
4cb586a1	253	return tpm_tis_init(&pnp_dev->dev, &tpm_info);
9e323d3e KJH	254	}
9e323d3e KJH	255
786a2aa2 JS	256	/*
	257	* There is a known bug caused by 93e1b7d42e1e ("[PATCH] tpm: add HID module
	258	* parameter"). This commit added IFX0102 device ID, which is also used by
	259	* tpm_infineon but ignored to add quirks to probe which driver ought to be
	260	* used.
	261	*/
	262
0bbed20e	263	static struct pnp_device_id tpm_pnp_tbl[] = {
27084efe	264	{"PNP0C31", 0}, /* TPM */
93e1b7d4	265	{"ATM1200", 0}, /* Atmel */
786a2aa2	266	{"IFX0102", 0}, /* Infineon */
93e1b7d4	267	{"BCM0101", 0}, /* Broadcom */
061991ec	268	{"BCM0102", 0}, /* Broadcom */
93e1b7d4	269	{"NSC1200", 0}, /* National */
fb0e7e11	270	{"ICO0102", 0}, /* Intel */
93e1b7d4 KJH	271	/* Add new here */
	272	{"", 0}, /* User Specified */
	273	{"", 0} /* Terminator */
27084efe	274	};
31bde71c	275	MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
27084efe	276
39af33fc	277	static void tpm_tis_pnp_remove(struct pnp_dev *dev)
253115b7 RA	278	{
253115b7 RA	279	struct tpm_chip *chip = pnp_get_drvdata(dev);
399235dc	280
afb5abc2 JS	281	tpm_chip_unregister(chip);
afb5abc2 JS	282	tpm_tis_remove(chip);
253115b7 RA	283	}
253115b7 RA	284
27084efe LD	285	static struct pnp_driver tis_pnp_driver = {
	286	.name = "tpm_tis",
	287	.id_table = tpm_pnp_tbl,
	288	.probe = tpm_tis_pnp_init,
253115b7	289	.remove = tpm_tis_pnp_remove,
a2fa3fb0 SK	290	.driver = {
	291	.pm = &tpm_tis_pm,
	292	},
27084efe LD	293	};
27084efe LD	294
33957a10	295	#define TIS_HID_USR_IDX (ARRAY_SIZE(tpm_pnp_tbl) - 2)
93e1b7d4 KJH	296	module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
	297	sizeof(tpm_pnp_tbl[TIS_HID_USR_IDX].id), 0444);
	298	MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
7a192ec3	299
00194826 JG	300	static struct platform_device *force_pdev;
	301
	302	static int tpm_tis_plat_probe(struct platform_device *pdev)
	303	{
	304	struct tpm_info tpm_info = {};
	305	struct resource *res;
	306
	307	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	308	if (res == NULL) {
	309	dev_err(&pdev->dev, "no memory resource defined\n");
	310	return -ENODEV;
	311	}
	312	tpm_info.res = *res;
	313
9c8c5742	314	tpm_info.irq = platform_get_irq_optional(pdev, 0);
fc0e1322	315	if (tpm_info.irq <= 0) {
d27f81f0	316	if (pdev != force_pdev)
00194826 JG	317	tpm_info.irq = -1;
	318	else
	319	/* When forcing auto probe the IRQ */
	320	tpm_info.irq = 0;
	321	}
	322
4cb586a1	323	return tpm_tis_init(&pdev->dev, &tpm_info);
00194826 JG	324	}
	325
	326	static int tpm_tis_plat_remove(struct platform_device *pdev)
	327	{
	328	struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
	329
	330	tpm_chip_unregister(chip);
	331	tpm_tis_remove(chip);
	332
	333	return 0;
	334	}
	335
420d4398 JG	336	#ifdef CONFIG_OF
	337	static const struct of_device_id tis_of_platform_match[] = {
	338	{.compatible = "tcg,tpm-tis-mmio"},
	339	{},
	340	};
	341	MODULE_DEVICE_TABLE(of, tis_of_platform_match);
	342	#endif
	343
7a192ec3	344	static struct platform_driver tis_drv = {
00194826 JG	345	.probe = tpm_tis_plat_probe,
00194826 JG	346	.remove = tpm_tis_plat_remove,
7a192ec3	347	.driver = {
afb5abc2	348	.name = "tpm_tis",
b633f050	349	.pm = &tpm_tis_pm,
420d4398	350	.of_match_table = of_match_ptr(tis_of_platform_match),
4cb586a1	351	.acpi_match_table = ACPI_PTR(tpm_acpi_tbl),
7a192ec3	352	},
9e323d3e KJH	353	};
9e323d3e KJH	354
00194826 JG	355	static int tpm_tis_force_device(void)
	356	{
	357	struct platform_device *pdev;
	358	static const struct resource x86_resources[] = {
5a118a39	359	DEFINE_RES_MEM(0xFED40000, TIS_MEM_LEN)
00194826 JG	360	};
	361
	362	if (!force)
	363	return 0;
	364
	365	/* The driver core will match the name tpm_tis of the device to
	366	* the tpm_tis platform driver and complete the setup via
	367	* tpm_tis_plat_probe
	368	*/
	369	pdev = platform_device_register_simple("tpm_tis", -1, x86_resources,
	370	ARRAY_SIZE(x86_resources));
	371	if (IS_ERR(pdev))
	372	return PTR_ERR(pdev);
	373	force_pdev = pdev;
	374
	375	return 0;
	376	}
	377
27084efe LD	378	static int __init init_tis(void)
27084efe LD	379	{
9e323d3e	380	int rc;
00194826 JG	381
	382	rc = tpm_tis_force_device();
	383	if (rc)
	384	goto err_force;
	385
	386	rc = platform_driver_register(&tis_drv);
	387	if (rc)
	388	goto err_platform;
	389
9e323d3e	390
00194826 JG	391	if (IS_ENABLED(CONFIG_PNP)) {
	392	rc = pnp_register_driver(&tis_pnp_driver);
	393	if (rc)
	394	goto err_pnp;
9e323d3e	395	}
00194826	396
4fba3c3b	397	return 0;
00194826 JG	398
00194826 JG	399	err_pnp:
5939eaf4	400	platform_driver_unregister(&tis_drv);
00194826 JG	401	err_platform:
	402	if (force_pdev)
	403	platform_device_unregister(force_pdev);
	404	err_force:
7f2ab000	405	return rc;
27084efe LD	406	}
	407
	408	static void __exit cleanup_tis(void)
	409	{
00194826	410	pnp_unregister_driver(&tis_pnp_driver);
7f2ab000	411	platform_driver_unregister(&tis_drv);
00194826 JG	412
	413	if (force_pdev)
	414	platform_device_unregister(force_pdev);
27084efe LD	415	}
	416
	417	module_init(init_tis);
	418	module_exit(cleanup_tis);
	419	MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
	420	MODULE_DESCRIPTION("TPM Driver");
	421	MODULE_VERSION("2.0");
	422	MODULE_LICENSE("GPL");