Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2005, 2006 IBM Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 2014, 2015 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Leendert van Doorn <leendert@watson.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Kylene Hall <kjhall@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * Maintained by: <tpmdd-devel@lists.sourceforge.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * Device driver for TCG/TCPA TPM (trusted platform module).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * Specifications at www.trustedcomputinggroup.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * This device driver implements the TPM interface as defined in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * the TCG TPM Interface Spec version 1.2, revision 1.0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/pnp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/freezer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/dmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include "tpm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #include "tpm_tis_core.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) struct tpm_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	struct resource res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	/* irq > 0 means: use irq $irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	 * irq = 0 means: autoprobe for an irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	 * irq = -1 means: no irq support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) struct tpm_tis_tcg_phy {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	struct tpm_tis_data priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	void __iomem *iobase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) static inline struct tpm_tis_tcg_phy *to_tpm_tis_tcg_phy(struct tpm_tis_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	return container_of(data, struct tpm_tis_tcg_phy, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static int interrupts = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) module_param(interrupts, int, 0444);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) MODULE_PARM_DESC(interrupts, "Enable interrupts");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static bool itpm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) module_param(itpm, bool, 0444);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) MODULE_PARM_DESC(itpm, "Force iTPM workarounds (found on some Lenovo laptops)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) static bool force;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) #ifdef CONFIG_X86
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) module_param(force, bool, 0444);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) MODULE_PARM_DESC(force, "Force device probe rather than using ACPI entry");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) static int tpm_tis_disable_irq(const struct dmi_system_id *d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	if (interrupts == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		pr_notice("tpm_tis: %s detected: disabling interrupts.\n", d->ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		interrupts = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) static const struct dmi_system_id tpm_tis_dmi_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		.callback = tpm_tis_disable_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		.ident = "ThinkPad T490s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		.matches = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T490s"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) #if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) static int has_hid(struct acpi_device *dev, const char *hid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	struct acpi_hardware_id *id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	list_for_each_entry(id, &dev->pnp.ids, list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		if (!strcmp(hid, id->id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static inline int is_itpm(struct acpi_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	return has_hid(dev, "INTC0102");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static inline int is_itpm(struct acpi_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #if defined(CONFIG_ACPI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define DEVICE_IS_TPM2 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static const struct acpi_device_id tpm_acpi_tbl[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	{"MSFT0101", DEVICE_IS_TPM2},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) MODULE_DEVICE_TABLE(acpi, tpm_acpi_tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static int check_acpi_tpm2(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	const struct acpi_device_id *aid = acpi_match_device(tpm_acpi_tbl, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct acpi_table_tpm2 *tbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	acpi_status st;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (!aid || aid->driver_data != DEVICE_IS_TPM2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	/* If the ACPI TPM2 signature is matched then a global ACPI_SIG_TPM2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	 * table is mandatory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	st =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	    acpi_get_table(ACPI_SIG_TPM2, 1, (struct acpi_table_header **)&tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	if (ACPI_FAILURE(st) || tbl->header.length < sizeof(*tbl)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		dev_err(dev, FW_BUG "failed to get TPM2 ACPI table\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	/* The tpm2_crb driver handles this device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (tbl->start_method != ACPI_TPM2_MEMORY_MAPPED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static int check_acpi_tpm2(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static int tpm_tcg_read_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			      u8 *result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	while (len--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		*result++ = ioread8(phy->iobase + addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static int tpm_tcg_write_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			       const u8 *value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	while (len--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		iowrite8(*value++, phy->iobase + addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static int tpm_tcg_read16(struct tpm_tis_data *data, u32 addr, u16 *result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	*result = ioread16(phy->iobase + addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static int tpm_tcg_read32(struct tpm_tis_data *data, u32 addr, u32 *result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	*result = ioread32(phy->iobase + addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static int tpm_tcg_write32(struct tpm_tis_data *data, u32 addr, u32 value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	struct tpm_tis_tcg_phy *phy = to_tpm_tis_tcg_phy(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	iowrite32(value, phy->iobase + addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static const struct tpm_tis_phy_ops tpm_tcg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	.read_bytes = tpm_tcg_read_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	.write_bytes = tpm_tcg_write_bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	.read16 = tpm_tcg_read16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	.read32 = tpm_tcg_read32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	.write32 = tpm_tcg_write32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	struct tpm_tis_tcg_phy *phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	int irq = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	dmi_check_system(tpm_tis_dmi_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	rc = check_acpi_tpm2(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	phy = devm_kzalloc(dev, sizeof(struct tpm_tis_tcg_phy), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	if (phy == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	phy->iobase = devm_ioremap_resource(dev, &tpm_info->res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	if (IS_ERR(phy->iobase))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		return PTR_ERR(phy->iobase);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	if (interrupts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		irq = tpm_info->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	if (itpm || is_itpm(ACPI_COMPANION(dev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		phy->priv.flags |= TPM_TIS_ITPM_WORKAROUND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	return tpm_tis_core_init(dev, &phy->priv, irq, &tpm_tcg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 				 ACPI_HANDLE(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 			    const struct pnp_device_id *pnp_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	struct tpm_info tpm_info = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	res = pnp_get_resource(pnp_dev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	tpm_info.res = *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	if (pnp_irq_valid(pnp_dev, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		tpm_info.irq = pnp_irq(pnp_dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		tpm_info.irq = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	return tpm_tis_init(&pnp_dev->dev, &tpm_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)  * There is a known bug caused by 93e1b7d42e1e ("[PATCH] tpm: add HID module
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)  * parameter"). This commit added IFX0102 device ID, which is also used by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)  * tpm_infineon but ignored to add quirks to probe which driver ought to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)  * used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) static struct pnp_device_id tpm_pnp_tbl[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	{"PNP0C31", 0},		/* TPM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	{"ATM1200", 0},		/* Atmel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	{"IFX0102", 0},		/* Infineon */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	{"BCM0101", 0},		/* Broadcom */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	{"BCM0102", 0},		/* Broadcom */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	{"NSC1200", 0},		/* National */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	{"ICO0102", 0},		/* Intel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	/* Add new here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	{"", 0},		/* User Specified */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	{"", 0}			/* Terminator */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) static void tpm_tis_pnp_remove(struct pnp_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	struct tpm_chip *chip = pnp_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	tpm_chip_unregister(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	tpm_tis_remove(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static struct pnp_driver tis_pnp_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	.name = "tpm_tis",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	.id_table = tpm_pnp_tbl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	.probe = tpm_tis_pnp_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	.remove = tpm_tis_pnp_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	.driver	= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		.pm = &tpm_tis_pm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) #define TIS_HID_USR_IDX (ARRAY_SIZE(tpm_pnp_tbl) - 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		    sizeof(tpm_pnp_tbl[TIS_HID_USR_IDX].id), 0444);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) static struct platform_device *force_pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) static int tpm_tis_plat_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	struct tpm_info tpm_info = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	if (res == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		dev_err(&pdev->dev, "no memory resource defined\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	tpm_info.res = *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	tpm_info.irq = platform_get_irq_optional(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	if (tpm_info.irq <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		if (pdev != force_pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 			tpm_info.irq = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 			/* When forcing auto probe the IRQ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 			tpm_info.irq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	return tpm_tis_init(&pdev->dev, &tpm_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static int tpm_tis_plat_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	tpm_chip_unregister(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	tpm_tis_remove(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) static const struct of_device_id tis_of_platform_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	{.compatible = "tcg,tpm-tis-mmio"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) MODULE_DEVICE_TABLE(of, tis_of_platform_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) static struct platform_driver tis_drv = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	.probe = tpm_tis_plat_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	.remove = tpm_tis_plat_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 		.name		= "tpm_tis",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		.pm		= &tpm_tis_pm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		.of_match_table = of_match_ptr(tis_of_platform_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 		.acpi_match_table = ACPI_PTR(tpm_acpi_tbl),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) static int tpm_tis_force_device(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	struct platform_device *pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	static const struct resource x86_resources[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 			.start = 0xFED40000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 			.end = 0xFED40000 + TIS_MEM_LEN - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 			.flags = IORESOURCE_MEM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	if (!force)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	/* The driver core will match the name tpm_tis of the device to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	 * the tpm_tis platform driver and complete the setup via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	 * tpm_tis_plat_probe
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	pdev = platform_device_register_simple("tpm_tis", -1, x86_resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 					       ARRAY_SIZE(x86_resources));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	if (IS_ERR(pdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 		return PTR_ERR(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	force_pdev = pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) static int __init init_tis(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	rc = tpm_tis_force_device();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 		goto err_force;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	rc = platform_driver_register(&tis_drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 		goto err_platform;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 	if (IS_ENABLED(CONFIG_PNP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 		rc = pnp_register_driver(&tis_pnp_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 		if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 			goto err_pnp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) err_pnp:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	platform_driver_unregister(&tis_drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) err_platform:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	if (force_pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 		platform_device_unregister(force_pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) err_force:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) static void __exit cleanup_tis(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	pnp_unregister_driver(&tis_pnp_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 	platform_driver_unregister(&tis_drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	if (force_pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 		platform_device_unregister(force_pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) module_init(init_tis);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) module_exit(cleanup_tis);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) MODULE_DESCRIPTION("TPM Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) MODULE_VERSION("2.0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) MODULE_LICENSE("GPL");