# Makefile for the kernel tpm device drivers.
#
obj-$(CONFIG_TCG_TPM) += tpm.o
-tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o
+tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o
tpm-$(CONFIG_ACPI) += tpm_ppi.o
ifdef CONFIG_ACPI
--- /dev/null
+/*
+ * Copyright (C) 2004 IBM Corporation
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
+ * Leendert van Doorn <leendert@watson.ibm.com>
+ * Dave Safford <safford@watson.ibm.com>
+ * Reiner Sailer <sailer@watson.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ *
+ * Maintained by: <tpmdd-devel@lists.sourceforge.net>
+ *
+ * TPM chip management routines.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2 of the
+ * License.
+ *
+ */
+
+#include <linux/poll.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/freezer.h>
+#include "tpm.h"
+#include "tpm_eventlog.h"
+
+static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
+static LIST_HEAD(tpm_chip_list);
+static DEFINE_SPINLOCK(driver_lock);
+
+/*
+ * tpm_chip_find_get - return tpm_chip for a given chip number
+ * @chip_num the device number for the chip
+ */
+struct tpm_chip *tpm_chip_find_get(int chip_num)
+{
+ struct tpm_chip *pos, *chip = NULL;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(pos, &tpm_chip_list, list) {
+ if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num)
+ continue;
+
+ if (try_module_get(pos->dev->driver->owner)) {
+ chip = pos;
+ break;
+ }
+ }
+ rcu_read_unlock();
+ return chip;
+}
+
+/**
+ * tpmm_chip_remove() - free chip memory and device number
+ * @data: points to struct tpm_chip instance
+ *
+ * This is used internally by tpmm_chip_alloc() and called by devres
+ * when the device is released. This function does the opposite of
+ * tpmm_chip_alloc() freeing memory and the device number.
+ */
+static void tpmm_chip_remove(void *data)
+{
+ struct tpm_chip *chip = (struct tpm_chip *) data;
+
+ spin_lock(&driver_lock);
+ clear_bit(chip->dev_num, dev_mask);
+ spin_unlock(&driver_lock);
+ kfree(chip);
+}
+
+/**
+ * tpmm_chip_alloc() - allocate a new struct tpm_chip instance
+ * @dev: device to which the chip is associated
+ * @ops: struct tpm_class_ops instance
+ *
+ * Allocates a new struct tpm_chip instance and assigns a free
+ * device number for it. Caller does not have to worry about
+ * freeing the allocated resources. When the devices is removed
+ * devres calls tpmm_chip_remove() to do the job.
+ */
+struct tpm_chip *tpmm_chip_alloc(struct device *dev,
+ const struct tpm_class_ops *ops)
+{
+ struct tpm_chip *chip;
+
+ chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+ if (chip == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&chip->tpm_mutex);
+ INIT_LIST_HEAD(&chip->list);
+
+ chip->ops = ops;
+
+ spin_lock(&driver_lock);
+ chip->dev_num = find_first_zero_bit(dev_mask, TPM_NUM_DEVICES);
+ spin_unlock(&driver_lock);
+
+ if (chip->dev_num >= TPM_NUM_DEVICES) {
+ dev_err(dev, "No available tpm device numbers\n");
+ kfree(chip);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ set_bit(chip->dev_num, dev_mask);
+
+ scnprintf(chip->devname, sizeof(chip->devname), "tpm%d", chip->dev_num);
+
+ chip->dev = dev;
+ devm_add_action(dev, tpmm_chip_remove, chip);
+ dev_set_drvdata(dev, chip);
+
+ return chip;
+}
+EXPORT_SYMBOL_GPL(tpmm_chip_alloc);
+
+/*
+ * tpm_chip_register() - create a misc driver for the TPM chip
+ * @chip: TPM chip to use.
+ *
+ * Creates a misc driver for the TPM chip and adds sysfs interfaces for
+ * the device, PPI and TCPA. As the last step this function adds the
+ * chip to the list of TPM chips available for use.
+ *
+ * NOTE: This function should be only called after the chip initialization
+ * is complete.
+ *
+ * Called from tpm_<specific>.c probe function only for devices
+ * the driver has determined it should claim. Prior to calling
+ * this function the specific probe function has called pci_enable_device
+ * upon errant exit from this function specific probe function should call
+ * pci_disable_device
+ */
+int tpm_chip_register(struct tpm_chip *chip)
+{
+ int rc;
+
+ rc = tpm_dev_add_device(chip);
+ if (rc)
+ return rc;
+
+ rc = tpm_sysfs_add_device(chip);
+ if (rc)
+ goto del_misc;
+
+ rc = tpm_add_ppi(&chip->dev->kobj);
+ if (rc)
+ goto del_sysfs;
+
+ chip->bios_dir = tpm_bios_log_setup(chip->devname);
+
+ /* Make the chip available. */
+ spin_lock(&driver_lock);
+ list_add_rcu(&chip->list, &tpm_chip_list);
+ spin_unlock(&driver_lock);
+
+ chip->flags |= TPM_CHIP_FLAG_REGISTERED;
+
+ return 0;
+del_sysfs:
+ tpm_sysfs_del_device(chip);
+del_misc:
+ tpm_dev_del_device(chip);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(tpm_chip_register);
+
+/*
+ * tpm_chip_unregister() - release the TPM driver
+ * @chip: TPM chip to use.
+ *
+ * Takes the chip first away from the list of available TPM chips and then
+ * cleans up all the resources reserved by tpm_chip_register().
+ *
+ * NOTE: This function should be only called before deinitializing chip
+ * resources.
+ */
+void tpm_chip_unregister(struct tpm_chip *chip)
+{
+ if (!(chip->flags & TPM_CHIP_FLAG_REGISTERED))
+ return;
+
+ spin_lock(&driver_lock);
+ list_del_rcu(&chip->list);
+ spin_unlock(&driver_lock);
+ synchronize_rcu();
+
+ if (chip->bios_dir)
+ tpm_bios_log_teardown(chip->bios_dir);
+ tpm_remove_ppi(&chip->dev->kobj);
+ tpm_sysfs_del_device(chip);
+
+ tpm_dev_del_device(chip);
+}
+EXPORT_SYMBOL_GPL(tpm_chip_unregister);
/*
* Copyright (C) 2004 IBM Corporation
+ * Copyright (C) 2014 Intel Corporation
*
* Authors:
* Leendert van Doorn <leendert@watson.ibm.com>
MODULE_PARM_DESC(suspend_pcr,
"PCR to use for dummy writes to faciltate flush on suspend.");
-static LIST_HEAD(tpm_chip_list);
-static DEFINE_SPINLOCK(driver_lock);
-static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
-
/*
* Array with one entry per ordinal defining the maximum amount
* of time the chip could take to return the result. The ordinal
return rc;
}
-/*
- * tpm_chip_find_get - return tpm_chip for given chip number
- */
-static struct tpm_chip *tpm_chip_find_get(int chip_num)
-{
- struct tpm_chip *pos, *chip = NULL;
-
- rcu_read_lock();
- list_for_each_entry_rcu(pos, &tpm_chip_list, list) {
- if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num)
- continue;
-
- if (try_module_get(pos->dev->driver->owner)) {
- chip = pos;
- break;
- }
- }
- rcu_read_unlock();
- return chip;
-}
-
#define TPM_ORDINAL_PCRREAD cpu_to_be32(21)
#define READ_PCR_RESULT_SIZE 30
static struct tpm_input_header pcrread_header = {
}
EXPORT_SYMBOL_GPL(wait_for_tpm_stat);
-void tpm_remove_hardware(struct device *dev)
-{
- struct tpm_chip *chip = dev_get_drvdata(dev);
-
- if (chip == NULL) {
- dev_err(dev, "No device data found\n");
- return;
- }
-
- spin_lock(&driver_lock);
- list_del_rcu(&chip->list);
- spin_unlock(&driver_lock);
- synchronize_rcu();
-
- tpm_dev_del_device(chip);
- tpm_sysfs_del_device(chip);
- tpm_remove_ppi(&dev->kobj);
- tpm_bios_log_teardown(chip->bios_dir);
-
- /* write it this way to be explicit (chip->dev == dev) */
- put_device(chip->dev);
-}
-EXPORT_SYMBOL_GPL(tpm_remove_hardware);
-
#define TPM_ORD_SAVESTATE cpu_to_be32(152)
#define SAVESTATE_RESULT_SIZE 10
}
EXPORT_SYMBOL_GPL(tpm_get_random);
-/* In case vendor provided release function, call it too.*/
-
-void tpm_dev_vendor_release(struct tpm_chip *chip)
-{
- if (!chip)
- return;
-
- clear_bit(chip->dev_num, dev_mask);
-}
-EXPORT_SYMBOL_GPL(tpm_dev_vendor_release);
-
-
-/*
- * Once all references to platform device are down to 0,
- * release all allocated structures.
- */
-static void tpm_dev_release(struct device *dev)
-{
- struct tpm_chip *chip = dev_get_drvdata(dev);
-
- if (!chip)
- return;
-
- tpm_dev_vendor_release(chip);
-
- chip->release(dev);
- kfree(chip);
-}
-
-/*
- * Called from tpm_<specific>.c probe function only for devices
- * the driver has determined it should claim. Prior to calling
- * this function the specific probe function has called pci_enable_device
- * upon errant exit from this function specific probe function should call
- * pci_disable_device
- */
-struct tpm_chip *tpm_register_hardware(struct device *dev,
- const struct tpm_class_ops *ops)
-{
- struct tpm_chip *chip;
-
- /* Driver specific per-device data */
- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-
- if (chip == NULL)
- return NULL;
-
- mutex_init(&chip->tpm_mutex);
- INIT_LIST_HEAD(&chip->list);
-
- chip->ops = ops;
- chip->dev_num = find_first_zero_bit(dev_mask, TPM_NUM_DEVICES);
-
- if (chip->dev_num >= TPM_NUM_DEVICES) {
- dev_err(dev, "No available tpm device numbers\n");
- goto out_free;
- }
-
- set_bit(chip->dev_num, dev_mask);
-
- scnprintf(chip->devname, sizeof(chip->devname), "%s%d", "tpm",
- chip->dev_num);
-
- chip->dev = get_device(dev);
- chip->release = dev->release;
- dev->release = tpm_dev_release;
- dev_set_drvdata(dev, chip);
-
- if (tpm_dev_add_device(chip))
- goto put_device;
-
- if (tpm_sysfs_add_device(chip))
- goto del_misc;
-
- if (tpm_add_ppi(&dev->kobj))
- goto del_sysfs;
-
- chip->bios_dir = tpm_bios_log_setup(chip->devname);
-
- /* Make chip available */
- spin_lock(&driver_lock);
- list_add_tail_rcu(&chip->list, &tpm_chip_list);
- spin_unlock(&driver_lock);
-
- return chip;
-
-del_sysfs:
- tpm_sysfs_del_device(chip);
-del_misc:
- tpm_dev_del_device(chip);
-put_device:
- put_device(chip->dev);
-out_free:
- kfree(chip);
- return NULL;
-}
-EXPORT_SYMBOL_GPL(tpm_register_hardware);
-
MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
MODULE_DESCRIPTION("TPM Driver");
MODULE_VERSION("2.0");
#define TPM_VID_WINBOND 0x1050
#define TPM_VID_STM 0x104A
+enum tpm_chip_flags {
+ TPM_CHIP_FLAG_REGISTERED = BIT(0),
+};
+
struct tpm_chip {
struct device *dev; /* Device stuff */
const struct tpm_class_ops *ops;
+ unsigned int flags;
int dev_num; /* /dev/tpm# */
char devname[7];
struct dentry **bios_dir;
struct list_head list;
- void (*release) (struct device *);
};
#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
extern void tpm_gen_interrupt(struct tpm_chip *);
extern int tpm_do_selftest(struct tpm_chip *);
extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
-extern struct tpm_chip* tpm_register_hardware(struct device *,
- const struct tpm_class_ops *ops);
-extern void tpm_dev_vendor_release(struct tpm_chip *);
-extern void tpm_remove_hardware(struct device *);
extern int tpm_pm_suspend(struct device *);
extern int tpm_pm_resume(struct device *);
extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
wait_queue_head_t *, bool);
+struct tpm_chip *tpm_chip_find_get(int chip_num);
+extern struct tpm_chip *tpmm_chip_alloc(struct device *dev,
+ const struct tpm_class_ops *ops);
+extern int tpm_chip_register(struct tpm_chip *chip);
+extern void tpm_chip_unregister(struct tpm_chip *chip);
+
int tpm_dev_add_device(struct tpm_chip *chip);
void tpm_dev_del_device(struct tpm_chip *chip);
int tpm_sysfs_add_device(struct tpm_chip *chip);
struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
if (chip) {
+ tpm_chip_unregister(chip);
if (chip->vendor.have_region)
atmel_release_region(chip->vendor.base,
chip->vendor.region_size);
atmel_put_base_addr(chip->vendor.iobase);
- tpm_remove_hardware(chip->dev);
platform_device_unregister(pdev);
}
}
goto err_rel_reg;
}
- if (!(chip = tpm_register_hardware(&pdev->dev, &tpm_atmel))) {
- rc = -ENODEV;
+ chip = tpmm_chip_alloc(&pdev->dev, &tpm_atmel);
+ if (IS_ERR(chip)) {
+ rc = PTR_ERR(chip);
goto err_unreg_dev;
}
chip->vendor.have_region = have_region;
chip->vendor.region_size = region_size;
+ rc = tpm_chip_register(chip);
+ if (rc)
+ goto err_unreg_dev;
+
return 0;
err_unreg_dev:
static int i2c_atmel_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- int rc;
struct tpm_chip *chip;
struct device *dev = &client->dev;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
return -ENODEV;
- chip = tpm_register_hardware(dev, &i2c_atmel);
- if (!chip) {
- dev_err(dev, "%s() error in tpm_register_hardware\n", __func__);
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(dev, &i2c_atmel);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
chip->vendor.priv = devm_kzalloc(dev, sizeof(struct priv_data),
GFP_KERNEL);
- if (!chip->vendor.priv) {
- rc = -ENOMEM;
- goto out_err;
- }
+ if (!chip->vendor.priv)
+ return -ENOMEM;
/* Default timeouts */
chip->vendor.timeout_a = msecs_to_jiffies(TPM_I2C_SHORT_TIMEOUT);
/* There is no known way to probe for this device, and all version
* information seems to be read via TPM commands. Thus we rely on the
* TPM startup process in the common code to detect the device. */
- if (tpm_get_timeouts(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
-
- if (tpm_do_selftest(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
+ if (tpm_get_timeouts(chip))
+ return -ENODEV;
- return 0;
+ if (tpm_do_selftest(chip))
+ return -ENODEV;
-out_err:
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(chip->dev);
- return rc;
+ return tpm_chip_register(chip);
}
static int i2c_atmel_remove(struct i2c_client *client)
{
struct device *dev = &(client->dev);
struct tpm_chip *chip = dev_get_drvdata(dev);
-
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(dev);
- kfree(chip);
+ tpm_chip_unregister(chip);
return 0;
}
int rc = 0;
struct tpm_chip *chip;
- chip = tpm_register_hardware(dev, &tpm_tis_i2c);
- if (!chip) {
- dev_err(dev, "could not register hardware\n");
- rc = -ENODEV;
- goto out_err;
- }
+ chip = tpmm_chip_alloc(dev, &tpm_tis_i2c);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
/* Disable interrupts */
chip->vendor.irq = 0;
if (request_locality(chip, 0) != 0) {
dev_err(dev, "could not request locality\n");
rc = -ENODEV;
- goto out_vendor;
+ goto out_err;
}
/* read four bytes from DID_VID register */
tpm_get_timeouts(chip);
tpm_do_selftest(chip);
- return 0;
-
+ return tpm_chip_register(chip);
out_release:
release_locality(chip, chip->vendor.locality, 1);
-
-out_vendor:
- /* close file handles */
- tpm_dev_vendor_release(chip);
-
- /* remove hardware */
- tpm_remove_hardware(chip->dev);
-
- /* reset these pointers, otherwise we oops */
- chip->dev->release = NULL;
- chip->release = NULL;
tpm_dev.client = NULL;
out_err:
return rc;
static int tpm_tis_i2c_remove(struct i2c_client *client)
{
struct tpm_chip *chip = tpm_dev.chip;
- release_locality(chip, chip->vendor.locality, 1);
- /* close file handles */
- tpm_dev_vendor_release(chip);
-
- /* remove hardware */
- tpm_remove_hardware(chip->dev);
-
- /* reset these pointers, otherwise we oops */
- chip->dev->release = NULL;
- chip->release = NULL;
+ tpm_chip_unregister(chip);
+ release_locality(chip, chip->vendor.locality, 1);
tpm_dev.client = NULL;
return 0;
dev_info(dev, "VID: %04X DID: %02X RID: %02X\n", (u16) vid,
(u8) (vid >> 16), (u8) (vid >> 24));
- chip = tpm_register_hardware(dev, &tpm_i2c);
- if (!chip) {
- dev_err(dev, "%s() error in tpm_register_hardware\n", __func__);
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(dev, &tpm_i2c);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
chip->vendor.priv = devm_kzalloc(dev, sizeof(struct priv_data),
GFP_KERNEL);
- if (!chip->vendor.priv) {
- rc = -ENOMEM;
- goto out_err;
- }
+ if (!chip->vendor.priv)
+ return -ENOMEM;
init_waitqueue_head(&chip->vendor.read_queue);
init_waitqueue_head(&chip->vendor.int_queue);
TPM_DATA_FIFO_W,
1, (u8 *) (&rc));
if (rc < 0)
- goto out_err;
+ return rc;
/* TPM_STS <- 0x40 (commandReady) */
i2c_nuvoton_ready(chip);
} else {
* only TPM_STS_VALID should be set
*/
if (i2c_nuvoton_read_status(chip) !=
- TPM_STS_VALID) {
- rc = -EIO;
- goto out_err;
- }
+ TPM_STS_VALID)
+ return -EIO;
}
}
}
- if (tpm_get_timeouts(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
-
- if (tpm_do_selftest(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
+ if (tpm_get_timeouts(chip))
+ return -ENODEV;
- return 0;
+ if (tpm_do_selftest(chip))
+ return -ENODEV;
-out_err:
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(chip->dev);
- return rc;
+ return tpm_chip_register(chip);
}
static int i2c_nuvoton_remove(struct i2c_client *client)
{
struct device *dev = &(client->dev);
struct tpm_chip *chip = dev_get_drvdata(dev);
-
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(dev);
- kfree(chip);
+ tpm_chip_unregister(chip);
return 0;
}
-
static const struct i2c_device_id i2c_nuvoton_id[] = {
{I2C_DRIVER_NAME, 0},
{}
if (!tpm_dev)
return -ENOMEM;
- chip = tpm_register_hardware(&client->dev, &st_i2c_tpm);
- if (!chip) {
- dev_info(&client->dev, "fail chip\n");
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(&client->dev, &st_i2c_tpm);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
TPM_VPRIV(chip) = tpm_dev;
tpm_dev->client = client;
tpm_get_timeouts(chip);
tpm_do_selftest(chip);
- dev_info(chip->dev, "TPM I2C Initialized\n");
- return 0;
+ return tpm_chip_register(chip);
_tpm_clean_answer:
- tpm_remove_hardware(chip->dev);
dev_info(chip->dev, "TPM I2C initialisation fail\n");
return ret;
}
(struct tpm_chip *) i2c_get_clientdata(client);
if (chip)
- tpm_remove_hardware(chip->dev);
+ tpm_chip_unregister(chip);
return 0;
}
static int tpm_ibmvtpm_remove(struct vio_dev *vdev)
{
struct ibmvtpm_dev *ibmvtpm = ibmvtpm_get_data(&vdev->dev);
+ struct tpm_chip *chip = dev_get_drvdata(ibmvtpm->dev);
int rc = 0;
+ tpm_chip_unregister(chip);
+
free_irq(vdev->irq, ibmvtpm);
do {
kfree(ibmvtpm->rtce_buf);
}
- tpm_remove_hardware(ibmvtpm->dev);
-
kfree(ibmvtpm);
return 0;
struct tpm_chip *chip;
int rc = -ENOMEM, rc1;
- chip = tpm_register_hardware(dev, &tpm_ibmvtpm);
- if (!chip) {
- dev_err(dev, "tpm_register_hardware failed\n");
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(dev, &tpm_ibmvtpm);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
ibmvtpm = kzalloc(sizeof(struct ibmvtpm_dev), GFP_KERNEL);
if (!ibmvtpm) {
if (rc)
goto init_irq_cleanup;
- return rc;
+ return tpm_chip_register(chip);
init_irq_cleanup:
do {
rc1 = plpar_hcall_norets(H_FREE_CRQ, vio_dev->unit_address);
kfree(ibmvtpm);
}
- tpm_remove_hardware(dev);
-
return rc;
}
vendorid[0], vendorid[1],
productid[0], productid[1], chipname);
- if (!(chip = tpm_register_hardware(&dev->dev, &tpm_inf)))
+ chip = tpmm_chip_alloc(&dev->dev, &tpm_inf);
+ if (IS_ERR(chip)) {
+ rc = PTR_ERR(chip);
+ goto err_release_region;
+ }
+
+ rc = tpm_chip_register(chip);
+ if (rc)
goto err_release_region;
return 0;
{
struct tpm_chip *chip = pnp_get_drvdata(dev);
- if (chip) {
- if (tpm_dev.iotype == TPM_INF_IO_PORT) {
- release_region(tpm_dev.data_regs, tpm_dev.data_size);
- release_region(tpm_dev.config_port,
- tpm_dev.config_size);
- } else {
- iounmap(tpm_dev.mem_base);
- release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
- }
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(chip->dev);
+ tpm_chip_unregister(chip);
+
+ if (tpm_dev.iotype == TPM_INF_IO_PORT) {
+ release_region(tpm_dev.data_regs, tpm_dev.data_size);
+ release_region(tpm_dev.config_port,
+ tpm_dev.config_size);
+ } else {
+ iounmap(tpm_dev.mem_base);
+ release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
}
}
static void tpm_nsc_remove(struct device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
- if ( chip ) {
- release_region(chip->vendor.base, 2);
- tpm_remove_hardware(chip->dev);
- }
+
+ tpm_chip_unregister(chip);
+ release_region(chip->vendor.base, 2);
}
static SIMPLE_DEV_PM_OPS(tpm_nsc_pm, tpm_pm_suspend, tpm_pm_resume);
goto err_del_dev;
}
- if (!(chip = tpm_register_hardware(&pdev->dev, &tpm_nsc))) {
+ chip = tpmm_chip_alloc(&pdev->dev, &tpm_nsc);
+ if (IS_ERR(chip)) {
rc = -ENODEV;
goto err_rel_reg;
}
+ rc = tpm_chip_register(chip);
+ if (rc)
+ goto err_rel_reg;
+
dev_dbg(&pdev->dev, "NSC TPM detected\n");
dev_dbg(&pdev->dev,
"NSC LDN 0x%x, SID 0x%x, SRID 0x%x\n",
bool irq_tested;
};
-static LIST_HEAD(tis_chips);
-static DEFINE_MUTEX(tis_lock);
-
#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
static int is_itpm(struct pnp_dev *dev)
{
module_param(interrupts, bool, 0444);
MODULE_PARM_DESC(interrupts, "Enable interrupts");
+static void tpm_tis_remove(struct tpm_chip *chip)
+{
+ iowrite32(~TPM_GLOBAL_INT_ENABLE &
+ ioread32(chip->vendor.iobase +
+ TPM_INT_ENABLE(chip->vendor.
+ locality)),
+ chip->vendor.iobase +
+ TPM_INT_ENABLE(chip->vendor.locality));
+ release_locality(chip, chip->vendor.locality, 1);
+}
+
static int tpm_tis_init(struct device *dev, resource_size_t start,
resource_size_t len, unsigned int irq)
{
priv = devm_kzalloc(dev, sizeof(struct priv_data), GFP_KERNEL);
if (priv == NULL)
return -ENOMEM;
- if (!(chip = tpm_register_hardware(dev, &tpm_tis)))
- return -ENODEV;
+
+ chip = tpmm_chip_alloc(dev, &tpm_tis);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
+
chip->vendor.priv = priv;
- chip->vendor.iobase = ioremap(start, len);
- if (!chip->vendor.iobase) {
- rc = -EIO;
- goto out_err;
- }
+ chip->vendor.iobase = devm_ioremap(dev, start, len);
+ if (!chip->vendor.iobase)
+ return -EIO;
/* Default timeouts */
chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
for (i = irq_s; i <= irq_e && chip->vendor.irq == 0; i++) {
iowrite8(i, chip->vendor.iobase +
TPM_INT_VECTOR(chip->vendor.locality));
- if (request_irq
- (i, tis_int_probe, IRQF_SHARED,
+ if (devm_request_irq
+ (dev, i, tis_int_probe, IRQF_SHARED,
chip->vendor.miscdev.name, chip) != 0) {
dev_info(chip->dev,
"Unable to request irq: %d for probe\n",
iowrite32(intmask,
chip->vendor.iobase +
TPM_INT_ENABLE(chip->vendor.locality));
- free_irq(i, chip);
}
}
if (chip->vendor.irq) {
iowrite8(chip->vendor.irq,
chip->vendor.iobase +
TPM_INT_VECTOR(chip->vendor.locality));
- if (request_irq
- (chip->vendor.irq, tis_int_handler, IRQF_SHARED,
+ if (devm_request_irq
+ (dev, chip->vendor.irq, tis_int_handler, IRQF_SHARED,
chip->vendor.miscdev.name, chip) != 0) {
dev_info(chip->dev,
"Unable to request irq: %d for use\n",
goto out_err;
}
- INIT_LIST_HEAD(&chip->vendor.list);
- mutex_lock(&tis_lock);
- list_add(&chip->vendor.list, &tis_chips);
- mutex_unlock(&tis_lock);
-
-
- return 0;
+ return tpm_chip_register(chip);
out_err:
- if (chip->vendor.iobase)
- iounmap(chip->vendor.iobase);
- tpm_remove_hardware(chip->dev);
+ tpm_tis_remove(chip);
return rc;
}
static void tpm_tis_pnp_remove(struct pnp_dev *dev)
{
struct tpm_chip *chip = pnp_get_drvdata(dev);
-
- tpm_dev_vendor_release(chip);
-
- kfree(chip);
+ tpm_chip_unregister(chip);
+ tpm_tis_remove(chip);
}
-
static struct pnp_driver tis_pnp_driver = {
.name = "tpm_tis",
.id_table = tpm_pnp_tbl,
static struct platform_driver tis_drv = {
.driver = {
- .name = "tpm_tis",
+ .name = "tpm_tis",
.pm = &tpm_tis_pm,
},
};
static void __exit cleanup_tis(void)
{
- struct tpm_vendor_specific *i, *j;
struct tpm_chip *chip;
- mutex_lock(&tis_lock);
- list_for_each_entry_safe(i, j, &tis_chips, list) {
- chip = to_tpm_chip(i);
- tpm_remove_hardware(chip->dev);
- iowrite32(~TPM_GLOBAL_INT_ENABLE &
- ioread32(chip->vendor.iobase +
- TPM_INT_ENABLE(chip->vendor.
- locality)),
- chip->vendor.iobase +
- TPM_INT_ENABLE(chip->vendor.locality));
- release_locality(chip, chip->vendor.locality, 1);
- if (chip->vendor.irq)
- free_irq(chip->vendor.irq, chip);
- iounmap(i->iobase);
- list_del(&i->list);
- }
- mutex_unlock(&tis_lock);
#ifdef CONFIG_PNP
if (!force) {
pnp_unregister_driver(&tis_pnp_driver);
return;
}
#endif
+ chip = dev_get_drvdata(&pdev->dev);
+ tpm_chip_unregister(chip);
+ tpm_tis_remove(chip);
platform_device_unregister(pdev);
platform_driver_unregister(&tis_drv);
}
{
struct tpm_chip *chip;
- chip = tpm_register_hardware(dev, &tpm_vtpm);
- if (!chip)
- return -ENODEV;
+ chip = tpmm_chip_alloc(dev, &tpm_vtpm);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
init_waitqueue_head(&chip->vendor.read_queue);
const struct xenbus_device_id *id)
{
struct tpm_private *priv;
+ struct tpm_chip *chip;
int rv;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
rv = setup_ring(dev, priv);
if (rv) {
- tpm_remove_hardware(&dev->dev);
+ chip = dev_get_drvdata(&dev->dev);
+ tpm_chip_unregister(chip);
ring_free(priv);
return rv;
}
tpm_get_timeouts(priv->chip);
- return rv;
+ return tpm_chip_register(priv->chip);
}
static int tpmfront_remove(struct xenbus_device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(&dev->dev);
struct tpm_private *priv = TPM_VPRIV(chip);
- tpm_remove_hardware(&dev->dev);
+ tpm_chip_unregister(chip);
ring_free(priv);
TPM_VPRIV(chip) = NULL;
return 0;
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff