summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Documentation/ABI/stable/sysfs-class-tpm22
-rw-r--r--drivers/char/tpm/tpm-chip.c72
-rw-r--r--drivers/char/tpm/tpm-dev.c36
-rw-r--r--drivers/char/tpm/tpm-interface.c29
-rw-r--r--drivers/char/tpm/tpm.h12
-rw-r--r--drivers/char/tpm/tpm_i2c_nuvoton.c2
-rw-r--r--drivers/char/tpm/tpm_tis.c4
7 files changed, 116 insertions, 61 deletions
diff --git a/Documentation/ABI/stable/sysfs-class-tpm b/Documentation/ABI/stable/sysfs-class-tpm
index a60b45e2493b..9f790eebb5d2 100644
--- a/Documentation/ABI/stable/sysfs-class-tpm
+++ b/Documentation/ABI/stable/sysfs-class-tpm
@@ -1,4 +1,4 @@
-What: /sys/class/misc/tpmX/device/
+What: /sys/class/tpm/tpmX/device/
Date: April 2005
KernelVersion: 2.6.12
Contact: tpmdd-devel@lists.sf.net
@@ -6,7 +6,7 @@ Description: The device/ directory under a specific TPM instance exposes
the properties of that TPM chip
-What: /sys/class/misc/tpmX/device/active
+What: /sys/class/tpm/tpmX/device/active
Date: April 2006
KernelVersion: 2.6.17
Contact: tpmdd-devel@lists.sf.net
@@ -18,7 +18,7 @@ Description: The "active" property prints a '1' if the TPM chip is accepting
section 17 for more information on which commands are
available.
-What: /sys/class/misc/tpmX/device/cancel
+What: /sys/class/tpm/tpmX/device/cancel
Date: June 2005
KernelVersion: 2.6.13
Contact: tpmdd-devel@lists.sf.net
@@ -26,7 +26,7 @@ Description: The "cancel" property allows you to cancel the currently
pending TPM command. Writing any value to cancel will call the
TPM vendor specific cancel operation.
-What: /sys/class/misc/tpmX/device/caps
+What: /sys/class/tpm/tpmX/device/caps
Date: April 2005
KernelVersion: 2.6.12
Contact: tpmdd-devel@lists.sf.net
@@ -43,7 +43,7 @@ Description: The "caps" property contains TPM manufacturer and version info.
the chip supports. Firmware version is that of the chip and
is manufacturer specific.
-What: /sys/class/misc/tpmX/device/durations
+What: /sys/class/tpm/tpmX/device/durations
Date: March 2011
KernelVersion: 3.1
Contact: tpmdd-devel@lists.sf.net
@@ -66,7 +66,7 @@ Description: The "durations" property shows the 3 vendor-specific values
scaled to be displayed in usecs. In this case "[adjusted]"
will be displayed in place of "[original]".
-What: /sys/class/misc/tpmX/device/enabled
+What: /sys/class/tpm/tpmX/device/enabled
Date: April 2006
KernelVersion: 2.6.17
Contact: tpmdd-devel@lists.sf.net
@@ -75,7 +75,7 @@ Description: The "enabled" property prints a '1' if the TPM chip is enabled,
may be visible but produce a '0' after some operation that
disables the TPM.
-What: /sys/class/misc/tpmX/device/owned
+What: /sys/class/tpm/tpmX/device/owned
Date: April 2006
KernelVersion: 2.6.17
Contact: tpmdd-devel@lists.sf.net
@@ -83,7 +83,7 @@ Description: The "owned" property produces a '1' if the TPM_TakeOwnership
ordinal has been executed successfully in the chip. A '0'
indicates that ownership hasn't been taken.
-What: /sys/class/misc/tpmX/device/pcrs
+What: /sys/class/tpm/tpmX/device/pcrs
Date: April 2005
KernelVersion: 2.6.12
Contact: tpmdd-devel@lists.sf.net
@@ -106,7 +106,7 @@ Description: The "pcrs" property will dump the current value of all Platform
1.2 chips, PCRs represent SHA-1 hashes, which are 20 bytes
long. Use the "caps" property to determine TPM version.
-What: /sys/class/misc/tpmX/device/pubek
+What: /sys/class/tpm/tpmX/device/pubek
Date: April 2005
KernelVersion: 2.6.12
Contact: tpmdd-devel@lists.sf.net
@@ -158,7 +158,7 @@ Description: The "pubek" property will return the TPM's public endorsement
Modulus Length: 256 (bytes)
Modulus: The 256 byte Endorsement Key modulus
-What: /sys/class/misc/tpmX/device/temp_deactivated
+What: /sys/class/tpm/tpmX/device/temp_deactivated
Date: April 2006
KernelVersion: 2.6.17
Contact: tpmdd-devel@lists.sf.net
@@ -167,7 +167,7 @@ Description: The "temp_deactivated" property returns a '1' if the chip has
cycle. Whether a warm boot (reboot) will clear a TPM chip
from a temp_deactivated state is platform specific.
-What: /sys/class/misc/tpmX/device/timeouts
+What: /sys/class/tpm/tpmX/device/timeouts
Date: March 2011
KernelVersion: 3.1
Contact: tpmdd-devel@lists.sf.net
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index e72b042aa867..7596eef3bff9 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -25,6 +25,7 @@
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/freezer.h>
+#include <linux/major.h>
#include "tpm.h"
#include "tpm_eventlog.h"
@@ -32,6 +33,9 @@ static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
static LIST_HEAD(tpm_chip_list);
static DEFINE_SPINLOCK(driver_lock);
+struct class *tpm_class;
+dev_t tpm_devt;
+
/*
* tpm_chip_find_get - return tpm_chip for a given chip number
* @chip_num the device number for the chip
@@ -55,16 +59,14 @@ struct tpm_chip *tpm_chip_find_get(int chip_num)
}
/**
- * tpmm_chip_remove() - free chip memory and device number
- * @data: points to struct tpm_chip instance
+ * tpm_dev_release() - free chip memory and the device number
+ * @dev: the character device for the TPM chip
*
- * 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.
+ * This is used as the release function for the character device.
*/
-static void tpmm_chip_remove(void *data)
+static void tpm_dev_release(struct device *dev)
{
- struct tpm_chip *chip = (struct tpm_chip *) data;
+ struct tpm_chip *chip = container_of(dev, struct tpm_chip, dev);
spin_lock(&driver_lock);
clear_bit(chip->dev_num, dev_mask);
@@ -111,18 +113,68 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
scnprintf(chip->devname, sizeof(chip->devname), "tpm%d", chip->dev_num);
chip->pdev = dev;
- devm_add_action(dev, tpmm_chip_remove, chip);
+
dev_set_drvdata(dev, chip);
+ chip->dev.class = tpm_class;
+ chip->dev.release = tpm_dev_release;
+ chip->dev.parent = chip->pdev;
+
+ if (chip->dev_num == 0)
+ chip->dev.devt = MKDEV(MISC_MAJOR, TPM_MINOR);
+ else
+ chip->dev.devt = MKDEV(MAJOR(tpm_devt), chip->dev_num);
+
+ dev_set_name(&chip->dev, chip->devname);
+
+ device_initialize(&chip->dev);
+
+ chip->cdev.owner = chip->pdev->driver->owner;
+ cdev_init(&chip->cdev, &tpm_fops);
+
return chip;
}
EXPORT_SYMBOL_GPL(tpmm_chip_alloc);
+static int tpm_dev_add_device(struct tpm_chip *chip)
+{
+ int rc;
+
+ rc = device_add(&chip->dev);
+ if (rc) {
+ dev_err(&chip->dev,
+ "unable to device_register() %s, major %d, minor %d, err=%d\n",
+ chip->devname, MAJOR(chip->dev.devt),
+ MINOR(chip->dev.devt), rc);
+
+ return rc;
+ }
+
+ rc = cdev_add(&chip->cdev, chip->dev.devt, 1);
+ if (rc) {
+ dev_err(&chip->dev,
+ "unable to cdev_add() %s, major %d, minor %d, err=%d\n",
+ chip->devname, MAJOR(chip->dev.devt),
+ MINOR(chip->dev.devt), rc);
+
+ device_unregister(&chip->dev);
+ return rc;
+ }
+
+ return rc;
+}
+
+static void tpm_dev_del_device(struct tpm_chip *chip)
+{
+ cdev_del(&chip->cdev);
+ device_unregister(&chip->dev);
+}
+
/*
- * tpm_chip_register() - create a misc driver for the TPM chip
+ * tpm_chip_register() - create a character device for the TPM chip
* @chip: TPM chip to use.
*
- * Creates a misc driver for the TPM chip and adds sysfs interfaces for
+ * Creates a character device 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.
*
diff --git a/drivers/char/tpm/tpm-dev.c b/drivers/char/tpm/tpm-dev.c
index 356832146788..de0337ebd658 100644
--- a/drivers/char/tpm/tpm-dev.c
+++ b/drivers/char/tpm/tpm-dev.c
@@ -17,7 +17,6 @@
* License.
*
*/
-#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include "tpm.h"
@@ -54,9 +53,8 @@ static void timeout_work(struct work_struct *work)
static int tpm_open(struct inode *inode, struct file *file)
{
- struct miscdevice *misc = file->private_data;
- struct tpm_chip *chip = container_of(misc, struct tpm_chip,
- vendor.miscdev);
+ struct tpm_chip *chip =
+ container_of(inode->i_cdev, struct tpm_chip, cdev);
struct file_priv *priv;
/* It's assured that the chip will be opened just once,
@@ -173,7 +171,7 @@ static int tpm_release(struct inode *inode, struct file *file)
return 0;
}
-static const struct file_operations tpm_fops = {
+const struct file_operations tpm_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.open = tpm_open,
@@ -182,32 +180,4 @@ static const struct file_operations tpm_fops = {
.release = tpm_release,
};
-int tpm_dev_add_device(struct tpm_chip *chip)
-{
- int rc;
- chip->vendor.miscdev.fops = &tpm_fops;
- if (chip->dev_num == 0)
- chip->vendor.miscdev.minor = TPM_MINOR;
- else
- chip->vendor.miscdev.minor = MISC_DYNAMIC_MINOR;
-
- chip->vendor.miscdev.name = chip->devname;
- chip->vendor.miscdev.parent = chip->pdev;
-
- rc = misc_register(&chip->vendor.miscdev);
- if (rc) {
- chip->vendor.miscdev.name = NULL;
- dev_err(chip->pdev,
- "unable to misc_register %s, minor %d err=%d\n",
- chip->vendor.miscdev.name,
- chip->vendor.miscdev.minor, rc);
- }
- return rc;
-}
-
-void tpm_dev_del_device(struct tpm_chip *chip)
-{
- if (chip->vendor.miscdev.name)
- misc_deregister(&chip->vendor.miscdev);
-}
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index e2af28fd63cb..b6f6b17392fd 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -997,6 +997,35 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
}
EXPORT_SYMBOL_GPL(tpm_get_random);
+static int __init tpm_init(void)
+{
+ int rc;
+
+ tpm_class = class_create(THIS_MODULE, "tpm");
+ if (IS_ERR(tpm_class)) {
+ pr_err("couldn't create tpm class\n");
+ return PTR_ERR(tpm_class);
+ }
+
+ rc = alloc_chrdev_region(&tpm_devt, 0, TPM_NUM_DEVICES, "tpm");
+ if (rc < 0) {
+ pr_err("tpm: failed to allocate char dev region\n");
+ class_destroy(tpm_class);
+ return rc;
+ }
+
+ return 0;
+}
+
+static void __exit tpm_exit(void)
+{
+ class_destroy(tpm_class);
+ unregister_chrdev_region(tpm_devt, TPM_NUM_DEVICES);
+}
+
+subsys_initcall(tpm_init);
+module_exit(tpm_exit);
+
MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
MODULE_DESCRIPTION("TPM Driver");
MODULE_VERSION("2.0");
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index adf6af835329..d46765b4c97e 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -23,11 +23,11 @@
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/sched.h>
-#include <linux/miscdevice.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/tpm.h>
#include <linux/acpi.h>
+#include <linux/cdev.h>
enum tpm_const {
TPM_MINOR = 224, /* officially assigned */
@@ -74,7 +74,6 @@ struct tpm_vendor_specific {
int region_size;
int have_region;
- struct miscdevice miscdev;
struct list_head list;
int locality;
unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
@@ -104,6 +103,9 @@ enum tpm_chip_flags {
struct tpm_chip {
struct device *pdev; /* Device stuff */
+ struct device dev;
+ struct cdev cdev;
+
const struct tpm_class_ops *ops;
unsigned int flags;
@@ -326,6 +328,10 @@ struct tpm_cmd_t {
tpm_cmd_params params;
} __packed;
+extern struct class *tpm_class;
+extern dev_t tpm_devt;
+extern const struct file_operations tpm_fops;
+
ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
size_t bufsiz);
@@ -346,8 +352,6 @@ extern struct tpm_chip *tpmm_chip_alloc(struct device *dev,
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);
void tpm_sysfs_del_device(struct tpm_chip *chip);
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index e1eadb0c1568..9d42b7d78e50 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -560,7 +560,7 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
rc = devm_request_irq(dev, chip->vendor.irq,
i2c_nuvoton_int_handler,
IRQF_TRIGGER_LOW,
- chip->vendor.miscdev.name,
+ chip->devname,
chip);
if (rc) {
dev_err(dev, "%s() Unable to request irq: %d for use\n",
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 9e02489a94f3..239cf0bbc1a1 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -698,7 +698,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
TPM_INT_VECTOR(chip->vendor.locality));
if (devm_request_irq
(dev, i, tis_int_probe, IRQF_SHARED,
- chip->vendor.miscdev.name, chip) != 0) {
+ chip->devname, chip) != 0) {
dev_info(chip->pdev,
"Unable to request irq: %d for probe\n",
i);
@@ -745,7 +745,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
TPM_INT_VECTOR(chip->vendor.locality));
if (devm_request_irq
(dev, chip->vendor.irq, tis_int_handler, IRQF_SHARED,
- chip->vendor.miscdev.name, chip) != 0) {
+ chip->devname, chip) != 0) {
dev_info(chip->pdev,
"Unable to request irq: %d for use\n",
chip->vendor.irq);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 13:14:47 +0100