diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/char/tpm/tpm_tis.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/char/tpm/tpm_tis.c')
-rw-r--r-- | kernel/drivers/char/tpm/tpm_tis.c | 200 |
1 files changed, 170 insertions, 30 deletions
diff --git a/kernel/drivers/char/tpm/tpm_tis.c b/kernel/drivers/char/tpm/tpm_tis.c index f2dffa770..65f7eecc4 100644 --- a/kernel/drivers/char/tpm/tpm_tis.c +++ b/kernel/drivers/char/tpm/tpm_tis.c @@ -1,6 +1,6 @@ /* * Copyright (C) 2005, 2006 IBM Corporation - * Copyright (C) 2014 Intel Corporation + * Copyright (C) 2014, 2015 Intel Corporation * * Authors: * Leendert van Doorn <leendert@watson.ibm.com> @@ -28,6 +28,7 @@ #include <linux/wait.h> #include <linux/acpi.h> #include <linux/freezer.h> +#include <acpi/actbl2.h> #include "tpm.h" enum tis_access { @@ -65,6 +66,17 @@ enum tis_defaults { TIS_LONG_TIMEOUT = 2000, /* 2 sec */ }; +struct tpm_info { + unsigned long start; + unsigned long len; + unsigned int irq; +}; + +static struct tpm_info tis_default_info = { + .start = TIS_MEM_BASE, + .len = TIS_MEM_LEN, + .irq = 0, +}; /* Some timeout values are needed before it is known whether the chip is * TPM 1.0 or TPM 2.0. @@ -91,26 +103,54 @@ struct priv_data { }; #if defined(CONFIG_PNP) && defined(CONFIG_ACPI) -static int is_itpm(struct pnp_dev *dev) +static int has_hid(struct acpi_device *dev, const char *hid) { - struct acpi_device *acpi = pnp_acpi_device(dev); struct acpi_hardware_id *id; - if (!acpi) - return 0; - - list_for_each_entry(id, &acpi->pnp.ids, list) { - if (!strcmp("INTC0102", 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) +{ + return has_hid(dev, "INTC0102"); +} + +static inline int is_fifo(struct acpi_device *dev) +{ + struct acpi_table_tpm2 *tbl; + acpi_status st; + + /* TPM 1.2 FIFO */ + if (!has_hid(dev, "MSFT0101")) + return 1; + + st = acpi_get_table(ACPI_SIG_TPM2, 1, + (struct acpi_table_header **) &tbl); + if (ACPI_FAILURE(st)) { + dev_err(&dev->dev, "failed to get TPM2 ACPI table\n"); + return 0; + } + + if (le32_to_cpu(tbl->start_method) != TPM2_START_FIFO) + return 0; + + /* TPM 2.0 FIFO */ + return 1; +} #else -static inline int is_itpm(struct pnp_dev *dev) +static inline int is_itpm(struct acpi_device *dev) { return 0; } + +static inline int is_fifo(struct acpi_device *dev) +{ + return 1; +} #endif /* Before we attempt to access the TPM we must see that the valid bit is set. @@ -600,12 +640,12 @@ static void tpm_tis_remove(struct tpm_chip *chip) release_locality(chip, chip->vendor.locality, 1); } -static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, - resource_size_t start, resource_size_t len, - unsigned int irq) +static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info, + acpi_handle acpi_dev_handle) { u32 vendor, intfcaps, intmask; int rc, i, irq_s, irq_e, probe; + int irq_r = -1; struct tpm_chip *chip; struct priv_data *priv; @@ -622,7 +662,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, chip->acpi_dev_handle = acpi_dev_handle; #endif - chip->vendor.iobase = devm_ioremap(dev, start, len); + chip->vendor.iobase = devm_ioremap(dev, tpm_info->start, tpm_info->len); if (!chip->vendor.iobase) return -EIO; @@ -707,11 +747,12 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality)); if (interrupts) - chip->vendor.irq = irq; + chip->vendor.irq = tpm_info->irq; if (interrupts && !chip->vendor.irq) { irq_s = ioread8(chip->vendor.iobase + TPM_INT_VECTOR(chip->vendor.locality)); + irq_r = irq_s; if (irq_s) { irq_e = irq_s; } else { @@ -766,6 +807,8 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, iowrite32(intmask, chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality)); + + devm_free_irq(dev, i, chip); } } if (chip->vendor.irq) { @@ -792,7 +835,9 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle, chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality)); } - } + } else if (irq_r != -1) + iowrite8(irq_r, chip->vendor.iobase + + TPM_INT_VECTOR(chip->vendor.locality)); if (chip->flags & TPM_CHIP_FLAG_TPM2) { chip->vendor.timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A); @@ -890,27 +935,27 @@ 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) { - resource_size_t start, len; - unsigned int irq = 0; + struct tpm_info tpm_info = tis_default_info; acpi_handle acpi_dev_handle = NULL; - start = pnp_mem_start(pnp_dev, 0); - len = pnp_mem_len(pnp_dev, 0); + tpm_info.start = pnp_mem_start(pnp_dev, 0); + tpm_info.len = pnp_mem_len(pnp_dev, 0); if (pnp_irq_valid(pnp_dev, 0)) - irq = pnp_irq(pnp_dev, 0); + tpm_info.irq = pnp_irq(pnp_dev, 0); else interrupts = false; - if (is_itpm(pnp_dev)) - itpm = true; - #ifdef CONFIG_ACPI - if (pnp_acpi_device(pnp_dev)) + if (pnp_acpi_device(pnp_dev)) { + if (is_itpm(pnp_acpi_device(pnp_dev))) + itpm = true; + acpi_dev_handle = pnp_acpi_device(pnp_dev)->handle; + } #endif - return tpm_tis_init(&pnp_dev->dev, acpi_dev_handle, start, len, irq); + return tpm_tis_init(&pnp_dev->dev, &tpm_info, acpi_dev_handle); } static struct pnp_device_id tpm_pnp_tbl[] = { @@ -930,6 +975,7 @@ 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); } @@ -950,6 +996,79 @@ module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id, MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe"); #endif +#ifdef CONFIG_ACPI +static int tpm_check_resource(struct acpi_resource *ares, void *data) +{ + struct tpm_info *tpm_info = (struct tpm_info *) data; + struct resource res; + + if (acpi_dev_resource_interrupt(ares, 0, &res)) { + tpm_info->irq = res.start; + } else if (acpi_dev_resource_memory(ares, &res)) { + tpm_info->start = res.start; + tpm_info->len = resource_size(&res); + } + + return 1; +} + +static int tpm_tis_acpi_init(struct acpi_device *acpi_dev) +{ + struct list_head resources; + struct tpm_info tpm_info = tis_default_info; + int ret; + + if (!is_fifo(acpi_dev)) + return -ENODEV; + + INIT_LIST_HEAD(&resources); + ret = acpi_dev_get_resources(acpi_dev, &resources, tpm_check_resource, + &tpm_info); + if (ret < 0) + return ret; + + acpi_dev_free_resource_list(&resources); + + if (!tpm_info.irq) + interrupts = false; + + if (is_itpm(acpi_dev)) + itpm = true; + + return tpm_tis_init(&acpi_dev->dev, &tpm_info, acpi_dev->handle); +} + +static int tpm_tis_acpi_remove(struct acpi_device *dev) +{ + struct tpm_chip *chip = dev_get_drvdata(&dev->dev); + + tpm_chip_unregister(chip); + tpm_tis_remove(chip); + + return 0; +} + +static struct acpi_device_id tpm_acpi_tbl[] = { + {"MSFT0101", 0}, /* TPM 2.0 */ + /* Add new here */ + {"", 0}, /* User Specified */ + {"", 0} /* Terminator */ +}; +MODULE_DEVICE_TABLE(acpi, tpm_acpi_tbl); + +static struct acpi_driver tis_acpi_driver = { + .name = "tpm_tis", + .ids = tpm_acpi_tbl, + .ops = { + .add = tpm_tis_acpi_init, + .remove = tpm_tis_acpi_remove, + }, + .drv = { + .pm = &tpm_tis_pm, + }, +}; +#endif + static struct platform_driver tis_drv = { .driver = { .name = "tpm_tis", @@ -966,9 +1085,25 @@ static int __init init_tis(void) { int rc; #ifdef CONFIG_PNP - if (!force) - return pnp_register_driver(&tis_pnp_driver); + if (!force) { + rc = pnp_register_driver(&tis_pnp_driver); + if (rc) + return rc; + } +#endif +#ifdef CONFIG_ACPI + if (!force) { + rc = acpi_bus_register_driver(&tis_acpi_driver); + if (rc) { +#ifdef CONFIG_PNP + pnp_unregister_driver(&tis_pnp_driver); #endif + return rc; + } + } +#endif + if (!force) + return 0; rc = platform_driver_register(&tis_drv); if (rc < 0) @@ -978,7 +1113,7 @@ static int __init init_tis(void) rc = PTR_ERR(pdev); goto err_dev; } - rc = tpm_tis_init(&pdev->dev, NULL, TIS_MEM_BASE, TIS_MEM_LEN, 0); + rc = tpm_tis_init(&pdev->dev, &tis_default_info, NULL); if (rc) goto err_init; return 0; @@ -992,9 +1127,14 @@ err_dev: static void __exit cleanup_tis(void) { struct tpm_chip *chip; -#ifdef CONFIG_PNP +#if defined(CONFIG_PNP) || defined(CONFIG_ACPI) if (!force) { +#ifdef CONFIG_ACPI + acpi_bus_unregister_driver(&tis_acpi_driver); +#endif +#ifdef CONFIG_PNP pnp_unregister_driver(&tis_pnp_driver); +#endif return; } #endif |