--- /dev/null
+* STMicroelectronics SAS. ST33ZP24 TPM SoC
+
+Required properties:
+- compatible: Should be "st,st33zp24-spi".
+- spi-max-frequency: Maximum SPI frequency (<= 10000000).
+
+Optional ST33ZP24 Properties:
+- interrupt-parent: phandle for the interrupt gpio controller
+- interrupts: GPIO interrupt to which the chip is connected
+- lpcpd-gpios: Output GPIO pin used for ST33ZP24 power management D1/D2 state.
+If set, power must be present when the platform is going into sleep/hibernate mode.
+
+Optional SoC Specific Properties:
+- pinctrl-names: Contains only one value - "default".
+- pintctrl-0: Specifies the pin control groups used for this controller.
+
+Example (for ARM-based BeagleBoard xM with ST33ZP24 on SPI4):
+
+&mcspi4 {
+
+ status = "okay";
+
+ st33zp24@0 {
+
+ compatible = "st,st33zp24-spi";
+
+ spi-max-frequency = <10000000>;
+
+ interrupt-parent = <&gpio5>;
+ interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
+
+ lpcpd-gpios = <&gpio5 15 GPIO_ACTIVE_HIGH>;
+ };
+};
git://github.com/smack-team/smack.git
This should make and install on most modern distributions.
-There are three commands included in smackutil:
+There are five commands included in smackutil:
-smackload - properly formats data for writing to /smack/load
-smackcipso - properly formats data for writing to /smack/cipso
chsmack - display or set Smack extended attribute values
+smackctl - load the Smack access rules
+smackaccess - report if a process with one label has access
+ to an object with another
+
+These two commands are obsolete with the introduction of
+the smackfs/load2 and smackfs/cipso2 interfaces.
+
+smackload - properly formats data for writing to smackfs/load
+smackcipso - properly formats data for writing to smackfs/cipso
In keeping with the intent of Smack, configuration data is
minimal and not strictly required. The most important
Add this line to /etc/fstab:
- smackfs /smack smackfs smackfsdef=* 0 0
+ smackfs /sys/fs/smackfs smackfs defaults 0 0
-and create the /smack directory for mounting.
+The /sys/fs/smackfs directory is created by the kernel.
Smack uses extended attributes (xattrs) to store labels on filesystem
objects. The attributes are stored in the extended attribute security
# attr -S -s SMACK64 -V "value" path
# chsmack -a value path
-A process can see the smack label it is running with by
+A process can see the Smack label it is running with by
reading /proc/self/attr/current. A process with CAP_MAC_ADMIN
-can set the process smack by writing there.
+can set the process Smack by writing there.
Most Smack configuration is accomplished by writing to files
-in the smackfs filesystem. This pseudo-filesystem is usually
-mounted on /smack.
+in the smackfs filesystem. This pseudo-filesystem is mounted
+on /sys/fs/smackfs.
access
This interface reports whether a subject with the specified
file or cleared by writing "-" to the file.
ptrace
This is used to define the current ptrace policy
- 0 - default: this is the policy that relies on smack access rules.
+ 0 - default: this is the policy that relies on Smack access rules.
For the PTRACE_READ a subject needs to have a read access on
object. For the PTRACE_ATTACH a read-write access is required.
1 - exact: this is the policy that limits PTRACE_ATTACH. Attach is
only allowed when subject's and object's labels are equal.
- PTRACE_READ is not affected. Can be overriden with CAP_SYS_PTRACE.
+ PTRACE_READ is not affected. Can be overridden with CAP_SYS_PTRACE.
2 - draconian: this policy behaves like the 'exact' above with an
- exception that it can't be overriden with CAP_SYS_PTRACE.
+ exception that it can't be overridden with CAP_SYS_PTRACE.
revoke-subject
Writing a Smack label here sets the access to '-' for all access
rules with that subject label.
+unconfined
+ If the kernel is configured with CONFIG_SECURITY_SMACK_BRINGUP
+ a process with CAP_MAC_ADMIN can write a label into this interface.
+ Thereafter, accesses that involve that label will be logged and
+ the access permitted if it wouldn't be otherwise. Note that this
+ is dangerous and can ruin the proper labeling of your system.
+ It should never be used in production.
You can add access rules in /etc/smack/accesses. They take the form:
subjectlabel objectlabel access
-access is a combination of the letters rwxa which specify the
+access is a combination of the letters rwxatb which specify the
kind of access permitted a subject with subjectlabel on an
object with objectlabel. If there is no rule no access is allowed.
Labels
-Smack labels are ASCII character strings, one to twenty-three characters in
-length. Single character labels using special characters, that being anything
+Smack labels are ASCII character strings. They can be up to 255 characters
+long, but keeping them to twenty-three characters is recommended.
+Single character labels using special characters, that being anything
other than a letter or digit, are reserved for use by the Smack development
team. Smack labels are unstructured, case sensitive, and the only operation
ever performed on them is comparison for equality. Smack labels cannot
? Pronounced "huh", a single question mark character.
@ Pronounced "web", a single at sign character.
-Every task on a Smack system is assigned a label. System tasks, such as
-init(8) and systems daemons, are run with the floor ("_") label. User tasks
-are assigned labels according to the specification found in the
-/etc/smack/user configuration file.
+Every task on a Smack system is assigned a label. The Smack label
+of a process will usually be assigned by the system initialization
+mechanism.
Access Rules
w: indicates that write access should be granted.
x: indicates that execute access should be granted.
t: indicates that the rule requests transmutation.
+ b: indicates that the rule should be reported for bring-up.
Uppercase values for the specification letters are allowed as well.
Access mode specifications can be in any order. Examples of acceptable rules
Secret Unclass R
Manager Game x
User HR w
+ Snap Crackle rwxatb
New Old rRrRr
Closed Off -
Spaces are not allowed in labels. Since a subject always has access to files
with the same label specifying a rule for that case is pointless. Only
-valid letters (rwxatRWXAT) and the dash ('-') character are allowed in
+valid letters (rwxatbRWXATB) and the dash ('-') character are allowed in
access specifications. The dash is a placeholder, so "a-r" is the same
as "ar". A lone dash is used to specify that no access should be allowed.
Setting Access Rules
The configuration file /etc/smack/accesses contains the rules to be set at
-system startup. The contents are written to the special file /smack/load.
-Rules can be written to /smack/load at any time and take effect immediately.
-For any pair of subject and object labels there can be only one rule, with the
-most recently specified overriding any earlier specification.
-
-The program smackload is provided to ensure data is formatted
-properly when written to /smack/load. This program reads lines
-of the form
-
- subjectlabel objectlabel mode.
+system startup. The contents are written to the special file
+/sys/fs/smackfs/load2. Rules can be added at any time and take effect
+immediately. For any pair of subject and object labels there can be only
+one rule, with the most recently specified overriding any earlier
+specification.
Task Attribute
Privilege
-A process with CAP_MAC_OVERRIDE is privileged.
+A process with CAP_MAC_OVERRIDE or CAP_MAC_ADMIN is privileged.
+CAP_MAC_OVERRIDE allows the process access to objects it would
+be denied otherwise. CAP_MAC_ADMIN allows a process to change
+Smack data, including rules and attributes.
Smack Networking
ambient label.
Smack requires configuration in the case where packets from a system that is
-not smack that speaks CIPSO may be encountered. Usually this will be a Trusted
+not Smack that speaks CIPSO may be encountered. Usually this will be a Trusted
Solaris system, but there are other, less widely deployed systems out there.
CIPSO provides 3 important values, a Domain Of Interpretation (DOI), a level,
and a category set with each packet. The DOI is intended to identify a group
of systems that use compatible labeling schemes, and the DOI specified on the
-smack system must match that of the remote system or packets will be
-discarded. The DOI is 3 by default. The value can be read from /smack/doi and
-can be changed by writing to /smack/doi.
+Smack system must match that of the remote system or packets will be
+discarded. The DOI is 3 by default. The value can be read from
+/sys/fs/smackfs/doi and can be changed by writing to /sys/fs/smackfs/doi.
The label and category set are mapped to a Smack label as defined in
/etc/smack/cipso.
meaning.
The mapping of Smack labels to CIPSO values is defined by writing to
-/smack/cipso. Again, the format of data written to this special file
-is highly restrictive, so the program smackcipso is provided to
-ensure the writes are done properly. This program takes mappings
-on the standard input and sends them to /smack/cipso properly.
+/sys/fs/smackfs/cipso2.
In addition to explicit mappings Smack supports direct CIPSO mappings. One
CIPSO level is used to indicate that the category set passed in the packet is
in fact an encoding of the Smack label. The level used is 250 by default. The
-value can be read from /smack/direct and changed by writing to /smack/direct.
+value can be read from /sys/fs/smackfs/direct and changed by writing to
+/sys/fs/smackfs/direct.
Socket Attributes
Smack Netlabel Exceptions
You will often find that your labeled application has to talk to the outside,
-unlabeled world. To do this there's a special file /smack/netlabel where you can
-add some exceptions in the form of :
+unlabeled world. To do this there's a special file /sys/fs/smackfs/netlabel
+where you can add some exceptions in the form of :
@IP1 LABEL1 or
@IP2/MASK LABEL2
write access on LABEL1, and access to the subnet @IP2/MASK if it has write
access on LABEL2.
-Entries in the /smack/netlabel file are matched by longest mask first, like in
-classless IPv4 routing.
+Entries in the /sys/fs/smackfs/netlabel file are matched by longest mask
+first, like in classless IPv4 routing.
A special label '@' and an option '-CIPSO' can be used there :
@ means Internet, any application with any label has access to it
-CIPSO means standard CIPSO networking
If you don't know what CIPSO is and don't plan to use it, you can just do :
-echo 127.0.0.1 -CIPSO > /smack/netlabel
-echo 0.0.0.0/0 @ > /smack/netlabel
+echo 127.0.0.1 -CIPSO > /sys/fs/smackfs/netlabel
+echo 0.0.0.0/0 @ > /sys/fs/smackfs/netlabel
If you use CIPSO on your 192.168.0.0/16 local network and need also unlabeled
Internet access, you can have :
-echo 127.0.0.1 -CIPSO > /smack/netlabel
-echo 192.168.0.0/16 -CIPSO > /smack/netlabel
-echo 0.0.0.0/0 @ > /smack/netlabel
+echo 127.0.0.1 -CIPSO > /sys/fs/smackfs/netlabel
+echo 192.168.0.0/16 -CIPSO > /sys/fs/smackfs/netlabel
+echo 0.0.0.0/0 @ > /sys/fs/smackfs/netlabel
Writing Applications for Smack
If you want Smack auditing of security events, you need to set CONFIG_AUDIT
in your kernel configuration.
By default, all denied events will be audited. You can change this behavior by
-writing a single character to the /smack/logging file :
+writing a single character to the /sys/fs/smackfs/logging file :
0 : no logging
1 : log denied (default)
2 : log accepted
the subject, the object, the rights requested, the action, the kernel function
that triggered the event, plus other pairs depending on the type of event
audited.
+
+Bringup Mode
+
+Bringup mode provides logging features that can make application
+configuration and system bringup easier. Configure the kernel with
+CONFIG_SECURITY_SMACK_BRINGUP to enable these features. When bringup
+mode is enabled accesses that succeed due to rules marked with the "b"
+access mode will logged. When a new label is introduced for processes
+rules can be added aggressively, marked with the "b". The logging allows
+tracking of which rules actual get used for that label.
+
+Another feature of bringup mode is the "unconfined" option. Writing
+a label to /sys/fs/smackfs/unconfined makes subjects with that label
+able to access any object, and objects with that label accessible to
+all subjects. Any access that is granted because a label is unconfined
+is logged. This feature is dangerous, as files and directories may
+be created in places they couldn't if the policy were being enforced.
TPM DEVICE DRIVER
M: Peter Huewe <peterhuewe@gmx.de>
M: Marcel Selhorst <tpmdd@selhorst.net>
+R: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
W: http://tpmdd.sourceforge.net
L: tpmdd-devel@lists.sourceforge.net (moderated for non-subscribers)
Q: git git://github.com/PeterHuewe/linux-tpmdd.git
if TCG_TPM
config TCG_TIS
- tristate "TPM Interface Specification 1.2 Interface"
+ tristate "TPM Interface Specification 1.2 Interface / TPM 2.0 FIFO Interface"
depends on X86
---help---
If you have a TPM security chip that is compliant with the
- TCG TIS 1.2 TPM specification say Yes and it will be accessible
- from within Linux. To compile this driver as a module, choose
- M here; the module will be called tpm_tis.
+ TCG TIS 1.2 TPM specification (TPM1.2) or the TCG PTP FIFO
+ specification (TPM2.0) say Yes and it will be accessible from
+ within Linux. To compile this driver as a module, choose M here;
+ the module will be called tpm_tis.
config TCG_TIS_I2C_ATMEL
tristate "TPM Interface Specification 1.2 Interface (I2C - Atmel)"
will be accessible from within Linux. To compile this driver
as a module, choose M here; the module will be called tpm_ibmvtpm.
-config TCG_TIS_I2C_ST33
- tristate "TPM Interface Specification 1.2 Interface (I2C - STMicroelectronics)"
- depends on I2C
- depends on GPIOLIB
- ---help---
- If you have a TPM security chip from STMicroelectronics working with
- an I2C bus say Yes and it will be accessible from within Linux.
- To compile this driver as a module, choose M here; the module will be
- called tpm_i2c_stm_st33.
-
config TCG_XEN
tristate "XEN TPM Interface"
depends on TCG_TPM && XEN
from within Linux. To compile this driver as a module, choose
M here; the module will be called tpm_crb.
+source "drivers/char/tpm/st33zp24/Kconfig"
endif # TCG_TPM
obj-$(CONFIG_TCG_ATMEL) += tpm_atmel.o
obj-$(CONFIG_TCG_INFINEON) += tpm_infineon.o
obj-$(CONFIG_TCG_IBMVTPM) += tpm_ibmvtpm.o
-obj-$(CONFIG_TCG_TIS_I2C_ST33) += tpm_i2c_stm_st33.o
+obj-$(CONFIG_TCG_TIS_ST33ZP24) += st33zp24/
obj-$(CONFIG_TCG_XEN) += xen-tpmfront.o
obj-$(CONFIG_TCG_CRB) += tpm_crb.o
--- /dev/null
+config TCG_TIS_ST33ZP24
+ tristate "STMicroelectronics TPM Interface Specification 1.2 Interface"
+ depends on GPIOLIB
+ ---help---
+ STMicroelectronics ST33ZP24 core driver. It implements the core
+ TPM1.2 logic and hooks into the TPM kernel APIs. Physical layers will
+ register against it.
+
+ To compile this driver as a module, choose m here. The module will be called
+ tpm_st33zp24.
+
+config TCG_TIS_ST33ZP24_I2C
+ tristate "TPM 1.2 ST33ZP24 I2C support"
+ depends on TCG_TIS_ST33ZP24
+ depends on I2C
+ ---help---
+ This module adds support for the STMicroelectronics TPM security chip
+ ST33ZP24 with i2c interface.
+ To compile this driver as a module, choose M here; the module will be
+ called tpm_st33zp24_i2c.
+
+config TCG_TIS_ST33ZP24_SPI
+ tristate "TPM 1.2 ST33ZP24 SPI support"
+ depends on TCG_TIS_ST33ZP24
+ depends on SPI
+ ---help---
+ This module adds support for the STMicroelectronics TPM security chip
+ ST33ZP24 with spi interface.
+ To compile this driver as a module, choose M here; the module will be
+ called tpm_st33zp24_spi.
--- /dev/null
+#
+# Makefile for ST33ZP24 TPM 1.2 driver
+#
+
+tpm_st33zp24-objs = st33zp24.o
+obj-$(CONFIG_TCG_TIS_ST33ZP24) += tpm_st33zp24.o
+
+tpm_st33zp24_i2c-objs = i2c.o
+obj-$(CONFIG_TCG_TIS_ST33ZP24_I2C) += tpm_st33zp24_i2c.o
+
+tpm_st33zp24_spi-objs = spi.o
+obj-$(CONFIG_TCG_TIS_ST33ZP24_SPI) += tpm_st33zp24_spi.o
--- /dev/null
+/*
+ * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
+ * Copyright (C) 2009 - 2015 STMicroelectronics
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/of_irq.h>
+#include <linux/of_gpio.h>
+#include <linux/tpm.h>
+#include <linux/platform_data/st33zp24.h>
+
+#include "st33zp24.h"
+
+#define TPM_DUMMY_BYTE 0xAA
+
+struct st33zp24_i2c_phy {
+ struct i2c_client *client;
+ u8 buf[TPM_BUFSIZE + 1];
+ int io_lpcpd;
+};
+
+/*
+ * write8_reg
+ * Send byte to the TIS register according to the ST33ZP24 I2C protocol.
+ * @param: tpm_register, the tpm tis register where the data should be written
+ * @param: tpm_data, the tpm_data to write inside the tpm_register
+ * @param: tpm_size, The length of the data
+ * @return: Returns negative errno, or else the number of bytes written.
+ */
+static int write8_reg(void *phy_id, u8 tpm_register, u8 *tpm_data, int tpm_size)
+{
+ struct st33zp24_i2c_phy *phy = phy_id;
+
+ phy->buf[0] = tpm_register;
+ memcpy(phy->buf + 1, tpm_data, tpm_size);
+ return i2c_master_send(phy->client, phy->buf, tpm_size + 1);
+} /* write8_reg() */
+
+/*
+ * read8_reg
+ * Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
+ * @param: tpm_register, the tpm tis register where the data should be read
+ * @param: tpm_data, the TPM response
+ * @param: tpm_size, tpm TPM response size to read.
+ * @return: number of byte read successfully: should be one if success.
+ */
+static int read8_reg(void *phy_id, u8 tpm_register, u8 *tpm_data, int tpm_size)
+{
+ struct st33zp24_i2c_phy *phy = phy_id;
+ u8 status = 0;
+ u8 data;
+
+ data = TPM_DUMMY_BYTE;
+ status = write8_reg(phy, tpm_register, &data, 1);
+ if (status == 2)
+ status = i2c_master_recv(phy->client, tpm_data, tpm_size);
+ return status;
+} /* read8_reg() */
+
+/*
+ * st33zp24_i2c_send
+ * Send byte to the TIS register according to the ST33ZP24 I2C protocol.
+ * @param: phy_id, the phy description
+ * @param: tpm_register, the tpm tis register where the data should be written
+ * @param: tpm_data, the tpm_data to write inside the tpm_register
+ * @param: tpm_size, the length of the data
+ * @return: number of byte written successfully: should be one if success.
+ */
+static int st33zp24_i2c_send(void *phy_id, u8 tpm_register, u8 *tpm_data,
+ int tpm_size)
+{
+ return write8_reg(phy_id, tpm_register | TPM_WRITE_DIRECTION, tpm_data,
+ tpm_size);
+}
+
+/*
+ * st33zp24_i2c_recv
+ * Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
+ * @param: phy_id, the phy description
+ * @param: tpm_register, the tpm tis register where the data should be read
+ * @param: tpm_data, the TPM response
+ * @param: tpm_size, tpm TPM response size to read.
+ * @return: number of byte read successfully: should be one if success.
+ */
+static int st33zp24_i2c_recv(void *phy_id, u8 tpm_register, u8 *tpm_data,
+ int tpm_size)
+{
+ return read8_reg(phy_id, tpm_register, tpm_data, tpm_size);
+}
+
+static const struct st33zp24_phy_ops i2c_phy_ops = {
+ .send = st33zp24_i2c_send,
+ .recv = st33zp24_i2c_recv,
+};
+
+#ifdef CONFIG_OF
+static int st33zp24_i2c_of_request_resources(struct st33zp24_i2c_phy *phy)
+{
+ struct device_node *pp;
+ struct i2c_client *client = phy->client;
+ int gpio;
+ int ret;
+
+ pp = client->dev.of_node;
+ if (!pp) {
+ dev_err(&client->dev, "No platform data\n");
+ return -ENODEV;
+ }
+
+ /* Get GPIO from device tree */
+ gpio = of_get_named_gpio(pp, "lpcpd-gpios", 0);
+ if (gpio < 0) {
+ dev_err(&client->dev,
+ "Failed to retrieve lpcpd-gpios from dts.\n");
+ phy->io_lpcpd = -1;
+ /*
+ * lpcpd pin is not specified. This is not an issue as
+ * power management can be also managed by TPM specific
+ * commands. So leave with a success status code.
+ */
+ return 0;
+ }
+ /* GPIO request and configuration */
+ ret = devm_gpio_request_one(&client->dev, gpio,
+ GPIOF_OUT_INIT_HIGH, "TPM IO LPCPD");
+ if (ret) {
+ dev_err(&client->dev, "Failed to request lpcpd pin\n");
+ return -ENODEV;
+ }
+ phy->io_lpcpd = gpio;
+
+ return 0;
+}
+#else
+static int st33zp24_i2c_of_request_resources(struct st33zp24_i2c_phy *phy)
+{
+ return -ENODEV;
+}
+#endif
+
+static int st33zp24_i2c_request_resources(struct i2c_client *client,
+ struct st33zp24_i2c_phy *phy)
+{
+ struct st33zp24_platform_data *pdata;
+ int ret;
+
+ pdata = client->dev.platform_data;
+ if (!pdata) {
+ dev_err(&client->dev, "No platform data\n");
+ return -ENODEV;
+ }
+
+ /* store for late use */
+ phy->io_lpcpd = pdata->io_lpcpd;
+
+ if (gpio_is_valid(pdata->io_lpcpd)) {
+ ret = devm_gpio_request_one(&client->dev,
+ pdata->io_lpcpd, GPIOF_OUT_INIT_HIGH,
+ "TPM IO_LPCPD");
+ if (ret) {
+ dev_err(&client->dev, "Failed to request lpcpd pin\n");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * st33zp24_i2c_probe initialize the TPM device
+ * @param: client, the i2c_client drescription (TPM I2C description).
+ * @param: id, the i2c_device_id struct.
+ * @return: 0 in case of success.
+ * -1 in other case.
+ */
+static int st33zp24_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct st33zp24_platform_data *pdata;
+ struct st33zp24_i2c_phy *phy;
+
+ if (!client) {
+ pr_info("%s: i2c client is NULL. Device not accessible.\n",
+ __func__);
+ return -ENODEV;
+ }
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_info(&client->dev, "client not i2c capable\n");
+ return -ENODEV;
+ }
+
+ phy = devm_kzalloc(&client->dev, sizeof(struct st33zp24_i2c_phy),
+ GFP_KERNEL);
+ if (!phy)
+ return -ENOMEM;
+
+ phy->client = client;
+ pdata = client->dev.platform_data;
+ if (!pdata && client->dev.of_node) {
+ ret = st33zp24_i2c_of_request_resources(phy);
+ if (ret)
+ return ret;
+ } else if (pdata) {
+ ret = st33zp24_i2c_request_resources(client, phy);
+ if (ret)
+ return ret;
+ }
+
+ return st33zp24_probe(phy, &i2c_phy_ops, &client->dev, client->irq,
+ phy->io_lpcpd);
+}
+
+/*
+ * st33zp24_i2c_remove remove the TPM device
+ * @param: client, the i2c_client description (TPM I2C description).
+ * @return: 0 in case of success.
+ */
+static int st33zp24_i2c_remove(struct i2c_client *client)
+{
+ struct tpm_chip *chip = i2c_get_clientdata(client);
+
+ return st33zp24_remove(chip);
+}
+
+static const struct i2c_device_id st33zp24_i2c_id[] = {
+ {TPM_ST33_I2C, 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, st33zp24_i2c_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_st33zp24_i2c_match[] = {
+ { .compatible = "st,st33zp24-i2c", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_st33zp24_i2c_match);
+#endif
+
+static SIMPLE_DEV_PM_OPS(st33zp24_i2c_ops, st33zp24_pm_suspend,
+ st33zp24_pm_resume);
+
+static struct i2c_driver st33zp24_i2c_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = TPM_ST33_I2C,
+ .pm = &st33zp24_i2c_ops,
+ .of_match_table = of_match_ptr(of_st33zp24_i2c_match),
+ },
+ .probe = st33zp24_i2c_probe,
+ .remove = st33zp24_i2c_remove,
+ .id_table = st33zp24_i2c_id
+};
+
+module_i2c_driver(st33zp24_i2c_driver);
+
+MODULE_AUTHOR("TPM support (TPMsupport@list.st.com)");
+MODULE_DESCRIPTION("STM TPM 1.2 I2C ST33 Driver");
+MODULE_VERSION("1.3.0");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * STMicroelectronics TPM SPI Linux driver for TPM ST33ZP24
+ * Copyright (C) 2009 - 2015 STMicroelectronics
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/gpio.h>
+#include <linux/of_irq.h>
+#include <linux/of_gpio.h>
+#include <linux/tpm.h>
+#include <linux/platform_data/st33zp24.h>
+
+#include "st33zp24.h"
+
+#define TPM_DATA_FIFO 0x24
+#define TPM_INTF_CAPABILITY 0x14
+
+#define TPM_DUMMY_BYTE 0x00
+
+#define MAX_SPI_LATENCY 15
+#define LOCALITY0 0
+
+#define ST33ZP24_OK 0x5A
+#define ST33ZP24_UNDEFINED_ERR 0x80
+#define ST33ZP24_BADLOCALITY 0x81
+#define ST33ZP24_TISREGISTER_UKNOWN 0x82
+#define ST33ZP24_LOCALITY_NOT_ACTIVATED 0x83
+#define ST33ZP24_HASH_END_BEFORE_HASH_START 0x84
+#define ST33ZP24_BAD_COMMAND_ORDER 0x85
+#define ST33ZP24_INCORECT_RECEIVED_LENGTH 0x86
+#define ST33ZP24_TPM_FIFO_OVERFLOW 0x89
+#define ST33ZP24_UNEXPECTED_READ_FIFO 0x8A
+#define ST33ZP24_UNEXPECTED_WRITE_FIFO 0x8B
+#define ST33ZP24_CMDRDY_SET_WHEN_PROCESSING_HASH_END 0x90
+#define ST33ZP24_DUMMY_BYTES 0x00
+
+/*
+ * TPM command can be up to 2048 byte, A TPM response can be up to
+ * 1024 byte.
+ * Between command and response, there are latency byte (up to 15
+ * usually on st33zp24 2 are enough).
+ *
+ * Overall when sending a command and expecting an answer we need if
+ * worst case:
+ * 2048 (for the TPM command) + 1024 (for the TPM answer). We need
+ * some latency byte before the answer is available (max 15).
+ * We have 2048 + 1024 + 15.
+ */
+#define ST33ZP24_SPI_BUFFER_SIZE (TPM_BUFSIZE + (TPM_BUFSIZE / 2) +\
+ MAX_SPI_LATENCY)
+
+
+struct st33zp24_spi_phy {
+ struct spi_device *spi_device;
+ struct spi_transfer spi_xfer;
+ u8 tx_buf[ST33ZP24_SPI_BUFFER_SIZE];
+ u8 rx_buf[ST33ZP24_SPI_BUFFER_SIZE];
+
+ int io_lpcpd;
+ int latency;
+};
+
+static int st33zp24_status_to_errno(u8 code)
+{
+ switch (code) {
+ case ST33ZP24_OK:
+ return 0;
+ case ST33ZP24_UNDEFINED_ERR:
+ case ST33ZP24_BADLOCALITY:
+ case ST33ZP24_TISREGISTER_UKNOWN:
+ case ST33ZP24_LOCALITY_NOT_ACTIVATED:
+ case ST33ZP24_HASH_END_BEFORE_HASH_START:
+ case ST33ZP24_BAD_COMMAND_ORDER:
+ case ST33ZP24_UNEXPECTED_READ_FIFO:
+ case ST33ZP24_UNEXPECTED_WRITE_FIFO:
+ case ST33ZP24_CMDRDY_SET_WHEN_PROCESSING_HASH_END:
+ return -EPROTO;
+ case ST33ZP24_INCORECT_RECEIVED_LENGTH:
+ case ST33ZP24_TPM_FIFO_OVERFLOW:
+ return -EMSGSIZE;
+ case ST33ZP24_DUMMY_BYTES:
+ return -ENOSYS;
+ }
+ return code;
+}
+
+/*
+ * st33zp24_spi_send
+ * Send byte to the TIS register according to the ST33ZP24 SPI protocol.
+ * @param: phy_id, the phy description
+ * @param: tpm_register, the tpm tis register where the data should be written
+ * @param: tpm_data, the tpm_data to write inside the tpm_register
+ * @param: tpm_size, The length of the data
+ * @return: should be zero if success else a negative error code.
+ */
+static int st33zp24_spi_send(void *phy_id, u8 tpm_register, u8 *tpm_data,
+ int tpm_size)
+{
+ u8 data = 0;
+ int total_length = 0, nbr_dummy_bytes = 0, ret = 0;
+ struct st33zp24_spi_phy *phy = phy_id;
+ struct spi_device *dev = phy->spi_device;
+ u8 *tx_buf = (u8 *)phy->spi_xfer.tx_buf;
+ u8 *rx_buf = phy->spi_xfer.rx_buf;
+
+ /* Pre-Header */
+ data = TPM_WRITE_DIRECTION | LOCALITY0;
+ memcpy(tx_buf + total_length, &data, sizeof(data));
+ total_length++;
+ data = tpm_register;
+ memcpy(tx_buf + total_length, &data, sizeof(data));
+ total_length++;
+
+ if (tpm_size > 0 && tpm_register == TPM_DATA_FIFO) {
+ tx_buf[total_length++] = tpm_size >> 8;
+ tx_buf[total_length++] = tpm_size;
+ }
+
+ memcpy(&tx_buf[total_length], tpm_data, tpm_size);
+ total_length += tpm_size;
+
+ nbr_dummy_bytes = phy->latency;
+ memset(&tx_buf[total_length], TPM_DUMMY_BYTE, nbr_dummy_bytes);
+
+ phy->spi_xfer.len = total_length + nbr_dummy_bytes;
+
+ ret = spi_sync_transfer(dev, &phy->spi_xfer, 1);
+ if (ret == 0)
+ ret = rx_buf[total_length + nbr_dummy_bytes - 1];
+
+ return st33zp24_status_to_errno(ret);
+} /* st33zp24_spi_send() */
+
+/*
+ * read8_recv
+ * Recv byte from the TIS register according to the ST33ZP24 SPI protocol.
+ * @param: phy_id, the phy description
+ * @param: tpm_register, the tpm tis register where the data should be read
+ * @param: tpm_data, the TPM response
+ * @param: tpm_size, tpm TPM response size to read.
+ * @return: should be zero if success else a negative error code.
+ */
+static int read8_reg(void *phy_id, u8 tpm_register, u8 *tpm_data, int tpm_size)
+{
+ u8 data = 0;
+ int total_length = 0, nbr_dummy_bytes, ret;
+ struct st33zp24_spi_phy *phy = phy_id;
+ struct spi_device *dev = phy->spi_device;
+ u8 *tx_buf = (u8 *)phy->spi_xfer.tx_buf;
+ u8 *rx_buf = phy->spi_xfer.rx_buf;
+
+ /* Pre-Header */
+ data = LOCALITY0;
+ memcpy(tx_buf + total_length, &data, sizeof(data));
+ total_length++;
+ data = tpm_register;
+ memcpy(tx_buf + total_length, &data, sizeof(data));
+ total_length++;
+
+ nbr_dummy_bytes = phy->latency;
+ memset(&tx_buf[total_length], TPM_DUMMY_BYTE,
+ nbr_dummy_bytes + tpm_size);
+
+ phy->spi_xfer.len = total_length + nbr_dummy_bytes + tpm_size;
+
+ /* header + status byte + size of the data + status byte */
+ ret = spi_sync_transfer(dev, &phy->spi_xfer, 1);
+ if (tpm_size > 0 && ret == 0) {
+ ret = rx_buf[total_length + nbr_dummy_bytes - 1];
+
+ memcpy(tpm_data, rx_buf + total_length + nbr_dummy_bytes,
+ tpm_size);
+ }
+
+ return ret;
+} /* read8_reg() */
+
+/*
+ * st33zp24_spi_recv
+ * Recv byte from the TIS register according to the ST33ZP24 SPI protocol.
+ * @param: phy_id, the phy description
+ * @param: tpm_register, the tpm tis register where the data should be read
+ * @param: tpm_data, the TPM response
+ * @param: tpm_size, tpm TPM response size to read.
+ * @return: number of byte read successfully: should be one if success.
+ */
+static int st33zp24_spi_recv(void *phy_id, u8 tpm_register, u8 *tpm_data,
+ int tpm_size)
+{
+ int ret;
+
+ ret = read8_reg(phy_id, tpm_register, tpm_data, tpm_size);
+ if (!st33zp24_status_to_errno(ret))
+ return tpm_size;
+ return ret;
+} /* st33zp24_spi_recv() */
+
+static int evaluate_latency(void *phy_id)
+{
+ struct st33zp24_spi_phy *phy = phy_id;
+ int latency = 1, status = 0;
+ u8 data = 0;
+
+ while (!status && latency < MAX_SPI_LATENCY) {
+ phy->latency = latency;
+ status = read8_reg(phy_id, TPM_INTF_CAPABILITY, &data, 1);
+ latency++;
+ }
+ return latency - 1;
+} /* evaluate_latency() */
+
+static const struct st33zp24_phy_ops spi_phy_ops = {
+ .send = st33zp24_spi_send,
+ .recv = st33zp24_spi_recv,
+};
+
+#ifdef CONFIG_OF
+static int tpm_stm_spi_of_request_resources(struct st33zp24_spi_phy *phy)
+{
+ struct device_node *pp;
+ struct spi_device *dev = phy->spi_device;
+ int gpio;
+ int ret;
+
+ pp = dev->dev.of_node;
+ if (!pp) {
+ dev_err(&dev->dev, "No platform data\n");
+ return -ENODEV;
+ }
+
+ /* Get GPIO from device tree */
+ gpio = of_get_named_gpio(pp, "lpcpd-gpios", 0);
+ if (gpio < 0) {
+ dev_err(&dev->dev,
+ "Failed to retrieve lpcpd-gpios from dts.\n");
+ phy->io_lpcpd = -1;
+ /*
+ * lpcpd pin is not specified. This is not an issue as
+ * power management can be also managed by TPM specific
+ * commands. So leave with a success status code.
+ */
+ return 0;
+ }
+ /* GPIO request and configuration */
+ ret = devm_gpio_request_one(&dev->dev, gpio,
+ GPIOF_OUT_INIT_HIGH, "TPM IO LPCPD");
+ if (ret) {
+ dev_err(&dev->dev, "Failed to request lpcpd pin\n");
+ return -ENODEV;
+ }
+ phy->io_lpcpd = gpio;
+
+ return 0;
+}
+#else
+static int tpm_stm_spi_of_request_resources(struct st33zp24_spi_phy *phy)
+{
+ return -ENODEV;
+}
+#endif
+
+static int tpm_stm_spi_request_resources(struct spi_device *dev,
+ struct st33zp24_spi_phy *phy)
+{
+ struct st33zp24_platform_data *pdata;
+ int ret;
+
+ pdata = dev->dev.platform_data;
+ if (!pdata) {
+ dev_err(&dev->dev, "No platform data\n");
+ return -ENODEV;
+ }
+
+ /* store for late use */
+ phy->io_lpcpd = pdata->io_lpcpd;
+
+ if (gpio_is_valid(pdata->io_lpcpd)) {
+ ret = devm_gpio_request_one(&dev->dev,
+ pdata->io_lpcpd, GPIOF_OUT_INIT_HIGH,
+ "TPM IO_LPCPD");
+ if (ret) {
+ dev_err(&dev->dev, "%s : reset gpio_request failed\n",
+ __FILE__);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * tpm_st33_spi_probe initialize the TPM device
+ * @param: dev, the spi_device drescription (TPM SPI description).
+ * @return: 0 in case of success.
+ * or a negative value describing the error.
+ */
+static int
+tpm_st33_spi_probe(struct spi_device *dev)
+{
+ int ret;
+ struct st33zp24_platform_data *pdata;
+ struct st33zp24_spi_phy *phy;
+
+ /* Check SPI platform functionnalities */
+ if (!dev) {
+ pr_info("%s: dev is NULL. Device is not accessible.\n",
+ __func__);
+ return -ENODEV;
+ }
+
+ phy = devm_kzalloc(&dev->dev, sizeof(struct st33zp24_spi_phy),
+ GFP_KERNEL);
+ if (!phy)
+ return -ENOMEM;
+
+ phy->spi_device = dev;
+ pdata = dev->dev.platform_data;
+ if (!pdata && dev->dev.of_node) {
+ ret = tpm_stm_spi_of_request_resources(phy);
+ if (ret)
+ return ret;
+ } else if (pdata) {
+ ret = tpm_stm_spi_request_resources(dev, phy);
+ if (ret)
+ return ret;
+ }
+
+ phy->spi_xfer.tx_buf = phy->tx_buf;
+ phy->spi_xfer.rx_buf = phy->rx_buf;
+
+ phy->latency = evaluate_latency(phy);
+ if (phy->latency <= 0)
+ return -ENODEV;
+
+ return st33zp24_probe(phy, &spi_phy_ops, &dev->dev, dev->irq,
+ phy->io_lpcpd);
+}
+
+/*
+ * tpm_st33_spi_remove remove the TPM device
+ * @param: client, the spi_device drescription (TPM SPI description).
+ * @return: 0 in case of success.
+ */
+static int tpm_st33_spi_remove(struct spi_device *dev)
+{
+ struct tpm_chip *chip = spi_get_drvdata(dev);
+
+ return st33zp24_remove(chip);
+}
+
+static const struct spi_device_id st33zp24_spi_id[] = {
+ {TPM_ST33_SPI, 0},
+ {}
+};
+MODULE_DEVICE_TABLE(spi, st33zp24_spi_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_st33zp24_spi_match[] = {
+ { .compatible = "st,st33zp24-spi", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_st33zp24_spi_match);
+#endif
+
+static SIMPLE_DEV_PM_OPS(st33zp24_spi_ops, st33zp24_pm_suspend,
+ st33zp24_pm_resume);
+
+static struct spi_driver tpm_st33_spi_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = TPM_ST33_SPI,
+ .pm = &st33zp24_spi_ops,
+ .of_match_table = of_match_ptr(of_st33zp24_spi_match),
+ },
+ .probe = tpm_st33_spi_probe,
+ .remove = tpm_st33_spi_remove,
+ .id_table = st33zp24_spi_id,
+};
+
+module_spi_driver(tpm_st33_spi_driver);
+
+MODULE_AUTHOR("TPM support (TPMsupport@list.st.com)");
+MODULE_DESCRIPTION("STM TPM 1.2 SPI ST33 Driver");
+MODULE_VERSION("1.3.0");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * STMicroelectronics TPM Linux driver for TPM ST33ZP24
+ * Copyright (C) 2009 - 2015 STMicroelectronics
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/freezer.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/sched.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+
+#include "../tpm.h"
+#include "st33zp24.h"
+
+#define TPM_ACCESS 0x0
+#define TPM_STS 0x18
+#define TPM_DATA_FIFO 0x24
+#define TPM_INTF_CAPABILITY 0x14
+#define TPM_INT_STATUS 0x10
+#define TPM_INT_ENABLE 0x08
+
+#define LOCALITY0 0
+
+enum st33zp24_access {
+ TPM_ACCESS_VALID = 0x80,
+ TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
+ TPM_ACCESS_REQUEST_PENDING = 0x04,
+ TPM_ACCESS_REQUEST_USE = 0x02,
+};
+
+enum st33zp24_status {
+ TPM_STS_VALID = 0x80,
+ TPM_STS_COMMAND_READY = 0x40,
+ TPM_STS_GO = 0x20,
+ TPM_STS_DATA_AVAIL = 0x10,
+ TPM_STS_DATA_EXPECT = 0x08,
+};
+
+enum st33zp24_int_flags {
+ TPM_GLOBAL_INT_ENABLE = 0x80,
+ TPM_INTF_CMD_READY_INT = 0x080,
+ TPM_INTF_FIFO_AVALAIBLE_INT = 0x040,
+ TPM_INTF_WAKE_UP_READY_INT = 0x020,
+ TPM_INTF_LOCALITY_CHANGE_INT = 0x004,
+ TPM_INTF_STS_VALID_INT = 0x002,
+ TPM_INTF_DATA_AVAIL_INT = 0x001,
+};
+
+enum tis_defaults {
+ TIS_SHORT_TIMEOUT = 750,
+ TIS_LONG_TIMEOUT = 2000,
+};
+
+struct st33zp24_dev {
+ struct tpm_chip *chip;
+ void *phy_id;
+ const struct st33zp24_phy_ops *ops;
+ u32 intrs;
+ int io_lpcpd;
+};
+
+/*
+ * clear_interruption clear the pending interrupt.
+ * @param: tpm_dev, the tpm device device.
+ * @return: the interrupt status value.
+ */
+static u8 clear_interruption(struct st33zp24_dev *tpm_dev)
+{
+ u8 interrupt;
+
+ tpm_dev->ops->recv(tpm_dev->phy_id, TPM_INT_STATUS, &interrupt, 1);
+ tpm_dev->ops->send(tpm_dev->phy_id, TPM_INT_STATUS, &interrupt, 1);
+ return interrupt;
+} /* clear_interruption() */
+
+/*
+ * st33zp24_cancel, cancel the current command execution or
+ * set STS to COMMAND READY.
+ * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
+ */
+static void st33zp24_cancel(struct tpm_chip *chip)
+{
+ struct st33zp24_dev *tpm_dev;
+ u8 data;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ data = TPM_STS_COMMAND_READY;
+ tpm_dev->ops->send(tpm_dev->phy_id, TPM_STS, &data, 1);
+} /* st33zp24_cancel() */
+
+/*
+ * st33zp24_status return the TPM_STS register
+ * @param: chip, the tpm chip description
+ * @return: the TPM_STS register value.
+ */
+static u8 st33zp24_status(struct tpm_chip *chip)
+{
+ struct st33zp24_dev *tpm_dev;
+ u8 data;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ tpm_dev->ops->recv(tpm_dev->phy_id, TPM_STS, &data, 1);
+ return data;
+} /* st33zp24_status() */
+
+/*
+ * check_locality if the locality is active
+ * @param: chip, the tpm chip description
+ * @return: the active locality or -EACCESS.
+ */
+static int check_locality(struct tpm_chip *chip)
+{
+ struct st33zp24_dev *tpm_dev;
+ u8 data;
+ u8 status;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ status = tpm_dev->ops->recv(tpm_dev->phy_id, TPM_ACCESS, &data, 1);
+ if (status && (data &
+ (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
+ (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID))
+ return chip->vendor.locality;
+
+ return -EACCES;
+} /* check_locality() */
+
+/*
+ * request_locality request the TPM locality
+ * @param: chip, the chip description
+ * @return: the active locality or negative value.
+ */
+static int request_locality(struct tpm_chip *chip)
+{
+ unsigned long stop;
+ long ret;
+ struct st33zp24_dev *tpm_dev;
+ u8 data;
+
+ if (check_locality(chip) == chip->vendor.locality)
+ return chip->vendor.locality;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ data = TPM_ACCESS_REQUEST_USE;
+ ret = tpm_dev->ops->send(tpm_dev->phy_id, TPM_ACCESS, &data, 1);
+ if (ret < 0)
+ return ret;
+
+ stop = jiffies + chip->vendor.timeout_a;
+
+ /* Request locality is usually effective after the request */
+ do {
+ if (check_locality(chip) >= 0)
+ return chip->vendor.locality;
+ msleep(TPM_TIMEOUT);
+ } while (time_before(jiffies, stop));
+
+ /* could not get locality */
+ return -EACCES;
+} /* request_locality() */
+
+/*
+ * release_locality release the active locality
+ * @param: chip, the tpm chip description.
+ */
+static void release_locality(struct tpm_chip *chip)
+{
+ struct st33zp24_dev *tpm_dev;
+ u8 data;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+ data = TPM_ACCESS_ACTIVE_LOCALITY;
+
+ tpm_dev->ops->send(tpm_dev->phy_id, TPM_ACCESS, &data, 1);
+}
+
+/*
+ * get_burstcount return the burstcount value
+ * @param: chip, the chip description
+ * return: the burstcount or negative value.
+ */
+static int get_burstcount(struct tpm_chip *chip)
+{
+ unsigned long stop;
+ int burstcnt, status;
+ u8 tpm_reg, temp;
+ struct st33zp24_dev *tpm_dev;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ stop = jiffies + chip->vendor.timeout_d;
+ do {
+ tpm_reg = TPM_STS + 1;
+ status = tpm_dev->ops->recv(tpm_dev->phy_id, tpm_reg, &temp, 1);
+ if (status < 0)
+ return -EBUSY;
+
+ tpm_reg = TPM_STS + 2;
+ burstcnt = temp;
+ status = tpm_dev->ops->recv(tpm_dev->phy_id, tpm_reg, &temp, 1);
+ if (status < 0)
+ return -EBUSY;
+
+ burstcnt |= temp << 8;
+ if (burstcnt)
+ return burstcnt;
+ msleep(TPM_TIMEOUT);
+ } while (time_before(jiffies, stop));
+ return -EBUSY;
+} /* get_burstcount() */
+
+
+/*
+ * wait_for_tpm_stat_cond
+ * @param: chip, chip description
+ * @param: mask, expected mask value
+ * @param: check_cancel, does the command expected to be canceled ?
+ * @param: canceled, did we received a cancel request ?
+ * @return: true if status == mask or if the command is canceled.
+ * false in other cases.
+ */
+static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask,
+ bool check_cancel, bool *canceled)
+{
+ u8 status = chip->ops->status(chip);
+
+ *canceled = false;
+ if ((status & mask) == mask)
+ return true;
+ if (check_cancel && chip->ops->req_canceled(chip, status)) {
+ *canceled = true;
+ return true;
+ }
+ return false;
+}
+
+/*
+ * wait_for_stat wait for a TPM_STS value
+ * @param: chip, the tpm chip description
+ * @param: mask, the value mask to wait
+ * @param: timeout, the timeout
+ * @param: queue, the wait queue.
+ * @param: check_cancel, does the command can be cancelled ?
+ * @return: the tpm status, 0 if success, -ETIME if timeout is reached.
+ */
+static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
+ wait_queue_head_t *queue, bool check_cancel)
+{
+ unsigned long stop;
+ int ret = 0;
+ bool canceled = false;
+ bool condition;
+ u32 cur_intrs;
+ u8 status;
+ struct st33zp24_dev *tpm_dev;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ /* check current status */
+ status = st33zp24_status(chip);
+ if ((status & mask) == mask)
+ return 0;
+
+ stop = jiffies + timeout;
+
+ if (chip->vendor.irq) {
+ cur_intrs = tpm_dev->intrs;
+ clear_interruption(tpm_dev);
+ enable_irq(chip->vendor.irq);
+
+ do {
+ if (ret == -ERESTARTSYS && freezing(current))
+ clear_thread_flag(TIF_SIGPENDING);
+
+ timeout = stop - jiffies;
+ if ((long) timeout <= 0)
+ return -1;
+
+ ret = wait_event_interruptible_timeout(*queue,
+ cur_intrs != tpm_dev->intrs,
+ timeout);
+ clear_interruption(tpm_dev);
+ condition = wait_for_tpm_stat_cond(chip, mask,
+ check_cancel, &canceled);
+ if (ret >= 0 && condition) {
+ if (canceled)
+ return -ECANCELED;
+ return 0;
+ }
+ } while (ret == -ERESTARTSYS && freezing(current));
+
+ disable_irq_nosync(chip->vendor.irq);
+
+ } else {
+ do {
+ msleep(TPM_TIMEOUT);
+ status = chip->ops->status(chip);
+ if ((status & mask) == mask)
+ return 0;
+ } while (time_before(jiffies, stop));
+ }
+
+ return -ETIME;
+} /* wait_for_stat() */
+
+/*
+ * recv_data receive data
+ * @param: chip, the tpm chip description
+ * @param: buf, the buffer where the data are received
+ * @param: count, the number of data to receive
+ * @return: the number of bytes read from TPM FIFO.
+ */
+static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
+{
+ int size = 0, burstcnt, len, ret;
+ struct st33zp24_dev *tpm_dev;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ while (size < count &&
+ wait_for_stat(chip,
+ TPM_STS_DATA_AVAIL | TPM_STS_VALID,
+ chip->vendor.timeout_c,
+ &chip->vendor.read_queue, true) == 0) {
+ burstcnt = get_burstcount(chip);
+ if (burstcnt < 0)
+ return burstcnt;
+ len = min_t(int, burstcnt, count - size);
+ ret = tpm_dev->ops->recv(tpm_dev->phy_id, TPM_DATA_FIFO,
+ buf + size, len);
+ if (ret < 0)
+ return ret;
+
+ size += len;
+ }
+ return size;
+}
+
+/*
+ * tpm_ioserirq_handler the serirq irq handler
+ * @param: irq, the tpm chip description
+ * @param: dev_id, the description of the chip
+ * @return: the status of the handler.
+ */
+static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id)
+{
+ struct tpm_chip *chip = dev_id;
+ struct st33zp24_dev *tpm_dev;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ tpm_dev->intrs++;
+ wake_up_interruptible(&chip->vendor.read_queue);
+ disable_irq_nosync(chip->vendor.irq);
+
+ return IRQ_HANDLED;
+} /* tpm_ioserirq_handler() */
+
+/*
+ * st33zp24_send send TPM commands through the I2C bus.
+ *
+ * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
+ * @param: buf, the buffer to send.
+ * @param: count, the number of bytes to send.
+ * @return: In case of success the number of bytes sent.
+ * In other case, a < 0 value describing the issue.
+ */
+static int st33zp24_send(struct tpm_chip *chip, unsigned char *buf,
+ size_t len)
+{
+ u32 status, i, size, ordinal;
+ int burstcnt = 0;
+ int ret;
+ u8 data;
+ struct st33zp24_dev *tpm_dev;
+
+ if (!chip)
+ return -EBUSY;
+ if (len < TPM_HEADER_SIZE)
+ return -EBUSY;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ ret = request_locality(chip);
+ if (ret < 0)
+ return ret;
+
+ status = st33zp24_status(chip);
+ if ((status & TPM_STS_COMMAND_READY) == 0) {
+ st33zp24_cancel(chip);
+ if (wait_for_stat
+ (chip, TPM_STS_COMMAND_READY, chip->vendor.timeout_b,
+ &chip->vendor.read_queue, false) < 0) {
+ ret = -ETIME;
+ goto out_err;
+ }
+ }
+
+ for (i = 0; i < len - 1;) {
+ burstcnt = get_burstcount(chip);
+ if (burstcnt < 0)
+ return burstcnt;
+ size = min_t(int, len - i - 1, burstcnt);
+ ret = tpm_dev->ops->send(tpm_dev->phy_id, TPM_DATA_FIFO,
+ buf + i, size);
+ if (ret < 0)
+ goto out_err;
+
+ i += size;
+ }
+
+ status = st33zp24_status(chip);
+ if ((status & TPM_STS_DATA_EXPECT) == 0) {
+ ret = -EIO;
+ goto out_err;
+ }
+
+ ret = tpm_dev->ops->send(tpm_dev->phy_id, TPM_DATA_FIFO,
+ buf + len - 1, 1);
+ if (ret < 0)
+ goto out_err;
+
+ status = st33zp24_status(chip);
+ if ((status & TPM_STS_DATA_EXPECT) != 0) {
+ ret = -EIO;
+ goto out_err;
+ }
+
+ data = TPM_STS_GO;
+ ret = tpm_dev->ops->send(tpm_dev->phy_id, TPM_STS, &data, 1);
+ if (ret < 0)
+ goto out_err;
+
+ if (chip->vendor.irq) {
+ ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
+
+ ret = wait_for_stat(chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
+ tpm_calc_ordinal_duration(chip, ordinal),
+ &chip->vendor.read_queue, false);
+ if (ret < 0)
+ goto out_err;
+ }
+
+ return len;
+out_err:
+ st33zp24_cancel(chip);
+ release_locality(chip);
+ return ret;
+}
+
+/*
+ * st33zp24_recv received TPM response through TPM phy.
+ * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h.
+ * @param: buf, the buffer to store datas.
+ * @param: count, the number of bytes to send.
+ * @return: In case of success the number of bytes received.
+ * In other case, a < 0 value describing the issue.
+ */
+static int st33zp24_recv(struct tpm_chip *chip, unsigned char *buf,
+ size_t count)
+{
+ int size = 0;
+ int expected;
+
+ if (!chip)
+ return -EBUSY;
+
+ if (count < TPM_HEADER_SIZE) {
+ size = -EIO;
+ goto out;
+ }
+
+ size = recv_data(chip, buf, TPM_HEADER_SIZE);
+ if (size < TPM_HEADER_SIZE) {
+ dev_err(&chip->dev, "Unable to read header\n");
+ goto out;
+ }
+
+ expected = be32_to_cpu(*(__be32 *)(buf + 2));
+ if (expected > count) {
+ size = -EIO;
+ goto out;
+ }
+
+ size += recv_data(chip, &buf[TPM_HEADER_SIZE],
+ expected - TPM_HEADER_SIZE);
+ if (size < expected) {
+ dev_err(&chip->dev, "Unable to read remainder of result\n");
+ size = -ETIME;
+ }
+
+out:
+ st33zp24_cancel(chip);
+ release_locality(chip);
+ return size;
+}
+
+/*
+ * st33zp24_req_canceled
+ * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h.
+ * @param: status, the TPM status.
+ * @return: Does TPM ready to compute a new command ? true.
+ */
+static bool st33zp24_req_canceled(struct tpm_chip *chip, u8 status)
+{
+ return (status == TPM_STS_COMMAND_READY);
+}
+
+static const struct tpm_class_ops st33zp24_tpm = {
+ .send = st33zp24_send,
+ .recv = st33zp24_recv,
+ .cancel = st33zp24_cancel,
+ .status = st33zp24_status,
+ .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
+ .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
+ .req_canceled = st33zp24_req_canceled,
+};
+
+/*
+ * st33zp24_probe initialize the TPM device
+ * @param: client, the i2c_client drescription (TPM I2C description).
+ * @param: id, the i2c_device_id struct.
+ * @return: 0 in case of success.
+ * -1 in other case.
+ */
+int st33zp24_probe(void *phy_id, const struct st33zp24_phy_ops *ops,
+ struct device *dev, int irq, int io_lpcpd)
+{
+ int ret;
+ u8 intmask = 0;
+ struct tpm_chip *chip;
+ struct st33zp24_dev *tpm_dev;
+
+ chip = tpmm_chip_alloc(dev, &st33zp24_tpm);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
+
+ tpm_dev = devm_kzalloc(dev, sizeof(struct st33zp24_dev),
+ GFP_KERNEL);
+ if (!tpm_dev)
+ return -ENOMEM;
+
+ TPM_VPRIV(chip) = tpm_dev;
+ tpm_dev->phy_id = phy_id;
+ tpm_dev->ops = ops;
+
+ chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+ chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
+ chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+ chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+
+ chip->vendor.locality = LOCALITY0;
+
+ if (irq) {
+ /* INTERRUPT Setup */
+ init_waitqueue_head(&chip->vendor.read_queue);
+ tpm_dev->intrs = 0;
+
+ if (request_locality(chip) != LOCALITY0) {
+ ret = -ENODEV;
+ goto _tpm_clean_answer;
+ }
+
+ clear_interruption(tpm_dev);
+ ret = devm_request_irq(dev, irq, tpm_ioserirq_handler,
+ IRQF_TRIGGER_HIGH, "TPM SERIRQ management",
+ chip);
+ if (ret < 0) {
+ dev_err(&chip->dev, "TPM SERIRQ signals %d not available\n",
+ irq);
+ goto _tpm_clean_answer;
+ }
+
+ intmask |= TPM_INTF_CMD_READY_INT
+ | TPM_INTF_STS_VALID_INT
+ | TPM_INTF_DATA_AVAIL_INT;
+
+ ret = tpm_dev->ops->send(tpm_dev->phy_id, TPM_INT_ENABLE,
+ &intmask, 1);
+ if (ret < 0)
+ goto _tpm_clean_answer;
+
+ intmask = TPM_GLOBAL_INT_ENABLE;
+ ret = tpm_dev->ops->send(tpm_dev->phy_id, (TPM_INT_ENABLE + 3),
+ &intmask, 1);
+ if (ret < 0)
+ goto _tpm_clean_answer;
+
+ chip->vendor.irq = irq;
+
+ disable_irq_nosync(chip->vendor.irq);
+
+ tpm_gen_interrupt(chip);
+ }
+
+ tpm_get_timeouts(chip);
+ tpm_do_selftest(chip);
+
+ return tpm_chip_register(chip);
+_tpm_clean_answer:
+ dev_info(&chip->dev, "TPM initialization fail\n");
+ return ret;
+}
+EXPORT_SYMBOL(st33zp24_probe);
+
+/*
+ * st33zp24_remove remove the TPM device
+ * @param: tpm_data, the tpm phy.
+ * @return: 0 in case of success.
+ */
+int st33zp24_remove(struct tpm_chip *chip)
+{
+ tpm_chip_unregister(chip);
+ return 0;
+}
+EXPORT_SYMBOL(st33zp24_remove);
+
+#ifdef CONFIG_PM_SLEEP
+/*
+ * st33zp24_pm_suspend suspend the TPM device
+ * @param: tpm_data, the tpm phy.
+ * @param: mesg, the power management message.
+ * @return: 0 in case of success.
+ */
+int st33zp24_pm_suspend(struct device *dev)
+{
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct st33zp24_dev *tpm_dev;
+ int ret = 0;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ if (gpio_is_valid(tpm_dev->io_lpcpd))
+ gpio_set_value(tpm_dev->io_lpcpd, 0);
+ else
+ ret = tpm_pm_suspend(dev);
+
+ return ret;
+} /* st33zp24_pm_suspend() */
+EXPORT_SYMBOL(st33zp24_pm_suspend);
+
+/*
+ * st33zp24_pm_resume resume the TPM device
+ * @param: tpm_data, the tpm phy.
+ * @return: 0 in case of success.
+ */
+int st33zp24_pm_resume(struct device *dev)
+{
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct st33zp24_dev *tpm_dev;
+ int ret = 0;
+
+ tpm_dev = (struct st33zp24_dev *)TPM_VPRIV(chip);
+
+ if (gpio_is_valid(tpm_dev->io_lpcpd)) {
+ gpio_set_value(tpm_dev->io_lpcpd, 1);
+ ret = wait_for_stat(chip,
+ TPM_STS_VALID, chip->vendor.timeout_b,
+ &chip->vendor.read_queue, false);
+ } else {
+ ret = tpm_pm_resume(dev);
+ if (!ret)
+ tpm_do_selftest(chip);
+ }
+ return ret;
+} /* st33zp24_pm_resume() */
+EXPORT_SYMBOL(st33zp24_pm_resume);
+#endif
+
+MODULE_AUTHOR("TPM support (TPMsupport@list.st.com)");
+MODULE_DESCRIPTION("ST33ZP24 TPM 1.2 driver");
+MODULE_VERSION("1.3.0");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * STMicroelectronics TPM Linux driver for TPM ST33ZP24
+ * Copyright (C) 2009 - 2015 STMicroelectronics
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __LOCAL_ST33ZP24_H__
+#define __LOCAL_ST33ZP24_H__
+
+#define TPM_WRITE_DIRECTION 0x80
+#define TPM_BUFSIZE 2048
+
+struct st33zp24_phy_ops {
+ int (*send)(void *phy_id, u8 tpm_register, u8 *tpm_data, int tpm_size);
+ int (*recv)(void *phy_id, u8 tpm_register, u8 *tpm_data, int tpm_size);
+};
+
+#ifdef CONFIG_PM_SLEEP
+int st33zp24_pm_suspend(struct device *dev);
+int st33zp24_pm_resume(struct device *dev);
+#endif
+
+int st33zp24_probe(void *phy_id, const struct st33zp24_phy_ops *ops,
+ struct device *dev, int irq, int io_lpcpd);
+int st33zp24_remove(struct tpm_chip *chip);
+#endif /* __LOCAL_ST33ZP24_H__ */
device_unregister(&chip->dev);
}
+static int tpm1_chip_register(struct tpm_chip *chip)
+{
+ int rc;
+
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ return 0;
+
+ rc = tpm_sysfs_add_device(chip);
+ if (rc)
+ return rc;
+
+ rc = tpm_add_ppi(chip);
+ if (rc) {
+ tpm_sysfs_del_device(chip);
+ return rc;
+ }
+
+ chip->bios_dir = tpm_bios_log_setup(chip->devname);
+
+ return 0;
+}
+
+static void tpm1_chip_unregister(struct tpm_chip *chip)
+{
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ return;
+
+ if (chip->bios_dir)
+ tpm_bios_log_teardown(chip->bios_dir);
+
+ tpm_remove_ppi(chip);
+
+ tpm_sysfs_del_device(chip);
+}
+
/*
* tpm_chip_register() - create a character device for the TPM chip
* @chip: TPM chip to use.
{
int rc;
- /* Populate sysfs for TPM1 devices. */
- if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
- rc = tpm_sysfs_add_device(chip);
- if (rc)
- goto del_misc;
-
- rc = tpm_add_ppi(chip);
- if (rc)
- goto del_sysfs;
-
- chip->bios_dir = tpm_bios_log_setup(chip->devname);
- }
+ rc = tpm1_chip_register(chip);
+ if (rc)
+ return rc;
rc = tpm_dev_add_device(chip);
if (rc)
- return rc;
+ goto out_err;
/* Make the chip available. */
spin_lock(&driver_lock);
chip->flags |= TPM_CHIP_FLAG_REGISTERED;
return 0;
-del_sysfs:
- tpm_sysfs_del_device(chip);
-del_misc:
- tpm_dev_del_device(chip);
+out_err:
+ tpm1_chip_unregister(chip);
return rc;
}
EXPORT_SYMBOL_GPL(tpm_chip_register);
spin_unlock(&driver_lock);
synchronize_rcu();
- if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
- if (chip->bios_dir)
- tpm_bios_log_teardown(chip->bios_dir);
- tpm_remove_ppi(chip);
- tpm_sysfs_del_device(chip);
- }
-
+ tpm1_chip_unregister(chip);
tpm_dev_del_device(chip);
}
EXPORT_SYMBOL_GPL(tpm_chip_unregister);
+++ /dev/null
-/*
- * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
- * Copyright (C) 2009, 2010, 2014 STMicroelectronics
- *
- * 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; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- *
- * STMicroelectronics version 1.2.1, Copyright (C) 2014
- * STMicroelectronics comes with ABSOLUTELY NO WARRANTY.
- * This is free software, and you are welcome to redistribute it
- * under certain conditions.
- *
- * @Author: Christophe RICARD tpmsupport@st.com
- *
- * @File: tpm_stm_st33_i2c.c
- *
- * @Synopsis:
- * 09/15/2010: First shot driver tpm_tis driver for
- * lpc is used as model.
- */
-
-#include <linux/pci.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/i2c.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/wait.h>
-#include <linux/freezer.h>
-#include <linux/string.h>
-#include <linux/interrupt.h>
-#include <linux/sysfs.h>
-#include <linux/gpio.h>
-#include <linux/sched.h>
-#include <linux/uaccess.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/of_irq.h>
-#include <linux/of_gpio.h>
-
-#include <linux/platform_data/tpm_stm_st33.h>
-#include "tpm.h"
-
-#define TPM_ACCESS 0x0
-#define TPM_STS 0x18
-#define TPM_HASH_END 0x20
-#define TPM_DATA_FIFO 0x24
-#define TPM_HASH_DATA 0x24
-#define TPM_HASH_START 0x28
-#define TPM_INTF_CAPABILITY 0x14
-#define TPM_INT_STATUS 0x10
-#define TPM_INT_ENABLE 0x08
-
-#define TPM_DUMMY_BYTE 0xAA
-#define TPM_WRITE_DIRECTION 0x80
-#define TPM_HEADER_SIZE 10
-#define TPM_BUFSIZE 2048
-
-#define LOCALITY0 0
-
-
-enum stm33zp24_access {
- TPM_ACCESS_VALID = 0x80,
- TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
- TPM_ACCESS_REQUEST_PENDING = 0x04,
- TPM_ACCESS_REQUEST_USE = 0x02,
-};
-
-enum stm33zp24_status {
- TPM_STS_VALID = 0x80,
- TPM_STS_COMMAND_READY = 0x40,
- TPM_STS_GO = 0x20,
- TPM_STS_DATA_AVAIL = 0x10,
- TPM_STS_DATA_EXPECT = 0x08,
-};
-
-enum stm33zp24_int_flags {
- TPM_GLOBAL_INT_ENABLE = 0x80,
- TPM_INTF_CMD_READY_INT = 0x080,
- TPM_INTF_FIFO_AVALAIBLE_INT = 0x040,
- TPM_INTF_WAKE_UP_READY_INT = 0x020,
- TPM_INTF_LOCALITY_CHANGE_INT = 0x004,
- TPM_INTF_STS_VALID_INT = 0x002,
- TPM_INTF_DATA_AVAIL_INT = 0x001,
-};
-
-enum tis_defaults {
- TIS_SHORT_TIMEOUT = 750,
- TIS_LONG_TIMEOUT = 2000,
-};
-
-struct tpm_stm_dev {
- struct i2c_client *client;
- struct tpm_chip *chip;
- u8 buf[TPM_BUFSIZE + 1];
- u32 intrs;
- int io_lpcpd;
-};
-
-/*
- * write8_reg
- * Send byte to the TIS register according to the ST33ZP24 I2C protocol.
- * @param: tpm_register, the tpm tis register where the data should be written
- * @param: tpm_data, the tpm_data to write inside the tpm_register
- * @param: tpm_size, The length of the data
- * @return: Returns negative errno, or else the number of bytes written.
- */
-static int write8_reg(struct tpm_stm_dev *tpm_dev, u8 tpm_register,
- u8 *tpm_data, u16 tpm_size)
-{
- tpm_dev->buf[0] = tpm_register;
- memcpy(tpm_dev->buf + 1, tpm_data, tpm_size);
- return i2c_master_send(tpm_dev->client, tpm_dev->buf, tpm_size + 1);
-} /* write8_reg() */
-
-/*
- * read8_reg
- * Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
- * @param: tpm_register, the tpm tis register where the data should be read
- * @param: tpm_data, the TPM response
- * @param: tpm_size, tpm TPM response size to read.
- * @return: number of byte read successfully: should be one if success.
- */
-static int read8_reg(struct tpm_stm_dev *tpm_dev, u8 tpm_register,
- u8 *tpm_data, int tpm_size)
-{
- u8 status = 0;
- u8 data;
-
- data = TPM_DUMMY_BYTE;
- status = write8_reg(tpm_dev, tpm_register, &data, 1);
- if (status == 2)
- status = i2c_master_recv(tpm_dev->client, tpm_data, tpm_size);
- return status;
-} /* read8_reg() */
-
-/*
- * I2C_WRITE_DATA
- * Send byte to the TIS register according to the ST33ZP24 I2C protocol.
- * @param: tpm_dev, the chip description
- * @param: tpm_register, the tpm tis register where the data should be written
- * @param: tpm_data, the tpm_data to write inside the tpm_register
- * @param: tpm_size, The length of the data
- * @return: number of byte written successfully: should be one if success.
- */
-#define I2C_WRITE_DATA(tpm_dev, tpm_register, tpm_data, tpm_size) \
- (write8_reg(tpm_dev, tpm_register | \
- TPM_WRITE_DIRECTION, tpm_data, tpm_size))
-
-/*
- * I2C_READ_DATA
- * Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
- * @param: tpm_dev, the chip description
- * @param: tpm_register, the tpm tis register where the data should be read
- * @param: tpm_data, the TPM response
- * @param: tpm_size, tpm TPM response size to read.
- * @return: number of byte read successfully: should be one if success.
- */
-#define I2C_READ_DATA(tpm_dev, tpm_register, tpm_data, tpm_size) \
- (read8_reg(tpm_dev, tpm_register, tpm_data, tpm_size))
-
-/*
- * clear_interruption
- * clear the TPM interrupt register.
- * @param: tpm, the chip description
- * @return: the TPM_INT_STATUS value
- */
-static u8 clear_interruption(struct tpm_stm_dev *tpm_dev)
-{
- u8 interrupt;
-
- I2C_READ_DATA(tpm_dev, TPM_INT_STATUS, &interrupt, 1);
- I2C_WRITE_DATA(tpm_dev, TPM_INT_STATUS, &interrupt, 1);
- return interrupt;
-} /* clear_interruption() */
-
-/*
- * tpm_stm_i2c_cancel, cancel is not implemented.
- * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
- */
-static void tpm_stm_i2c_cancel(struct tpm_chip *chip)
-{
- struct tpm_stm_dev *tpm_dev;
- u8 data;
-
- tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
-
- data = TPM_STS_COMMAND_READY;
- I2C_WRITE_DATA(tpm_dev, TPM_STS, &data, 1);
-} /* tpm_stm_i2c_cancel() */
-
-/*
- * tpm_stm_spi_status return the TPM_STS register
- * @param: chip, the tpm chip description
- * @return: the TPM_STS register value.
- */
-static u8 tpm_stm_i2c_status(struct tpm_chip *chip)
-{
- struct tpm_stm_dev *tpm_dev;
- u8 data;
-
- tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
-
- I2C_READ_DATA(tpm_dev, TPM_STS, &data, 1);
- return data;
-} /* tpm_stm_i2c_status() */
-
-
-/*
- * check_locality if the locality is active
- * @param: chip, the tpm chip description
- * @return: the active locality or -EACCESS.
- */
-static int check_locality(struct tpm_chip *chip)
-{
- struct tpm_stm_dev *tpm_dev;
- u8 data;
- u8 status;
-
- tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
-
- status = I2C_READ_DATA(tpm_dev, TPM_ACCESS, &data, 1);
- if (status && (data &
- (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
- (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID))
- return chip->vendor.locality;
-
- return -EACCES;
-} /* check_locality() */
-
-/*
- * request_locality request the TPM locality
- * @param: chip, the chip description
- * @return: the active locality or EACCESS.
- */
-static int request_locality(struct tpm_chip *chip)
-{
- unsigned long stop;
- long ret;
- struct tpm_stm_dev *tpm_dev;
- u8 data;
-
- if (check_locality(chip) == chip->vendor.locality)
- return chip->vendor.locality;
-
- tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
-
- data = TPM_ACCESS_REQUEST_USE;
- ret = I2C_WRITE_DATA(tpm_dev, TPM_ACCESS, &data, 1);
- if (ret < 0)
- goto end;
-
- stop = jiffies + chip->vendor.timeout_a;
-
- /* Request locality is usually effective after the request */
- do {
- if (check_locality(chip) >= 0)
- return chip->vendor.locality;
- msleep(TPM_TIMEOUT);
- } while (time_before(jiffies, stop));
- ret = -EACCES;
-end:
- return ret;
-} /* request_locality() */
-
-/*
- * release_locality release the active locality
- * @param: chip, the tpm chip description.
- */
-static void release_locality(struct tpm_chip *chip)
-{
- struct tpm_stm_dev *tpm_dev;
- u8 data;
-
- tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
- data = TPM_ACCESS_ACTIVE_LOCALITY;
-
- I2C_WRITE_DATA(tpm_dev, TPM_ACCESS, &data, 1);
-}
-
-/*
- * get_burstcount return the burstcount address 0x19 0x1A
- * @param: chip, the chip description
- * return: the burstcount.
- */
-static int get_burstcount(struct tpm_chip *chip)
-{
- unsigned long stop;
- int burstcnt, status;
- u8 tpm_reg, temp;
- struct tpm_stm_dev *tpm_dev;
-
- tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
-
- stop = jiffies + chip->vendor.timeout_d;
- do {
- tpm_reg = TPM_STS + 1;
- status = I2C_READ_DATA(tpm_dev, tpm_reg, &temp, 1);
- if (status < 0)
- goto end;
-
- tpm_reg = tpm_reg + 1;
- burstcnt = temp;
- status = I2C_READ_DATA(tpm_dev, tpm_reg, &temp, 1);
- if (status < 0)
- goto end;
-
- burstcnt |= temp << 8;
- if (burstcnt)
- return burstcnt;
- msleep(TPM_TIMEOUT);
- } while (time_before(jiffies, stop));
-
-end:
- return -EBUSY;
-} /* get_burstcount() */
-
-static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask,
- bool check_cancel, bool *canceled)
-{
- u8 status = chip->ops->status(chip);
-
- *canceled = false;
- if ((status & mask) == mask)
- return true;
- if (check_cancel && chip->ops->req_canceled(chip, status)) {
- *canceled = true;
- return true;
- }
- return false;
-}
-
-/*
- * interrupt_to_status
- * @param: irq_mask, the irq mask value to wait
- * @return: the corresponding tpm_sts value
- */
-static u8 interrupt_to_status(u8 irq_mask)
-{
- u8 status = 0;
-
- if ((irq_mask & TPM_INTF_STS_VALID_INT) == TPM_INTF_STS_VALID_INT)
- status |= TPM_STS_VALID;
- if ((irq_mask & TPM_INTF_DATA_AVAIL_INT) == TPM_INTF_DATA_AVAIL_INT)
- status |= TPM_STS_DATA_AVAIL;
- if ((irq_mask & TPM_INTF_CMD_READY_INT) == TPM_INTF_CMD_READY_INT)
- status |= TPM_STS_COMMAND_READY;
-
- return status;
-} /* status_to_interrupt() */
-
-/*
- * wait_for_stat wait for a TPM_STS value
- * @param: chip, the tpm chip description
- * @param: mask, the value mask to wait
- * @param: timeout, the timeout
- * @param: queue, the wait queue.
- * @param: check_cancel, does the command can be cancelled ?
- * @return: the tpm status, 0 if success, -ETIME if timeout is reached.
- */
-static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
- wait_queue_head_t *queue, bool check_cancel)
-{
- unsigned long stop;
- int ret;
- bool canceled = false;
- bool condition;
- u32 cur_intrs;
- u8 interrupt, status;
- struct tpm_stm_dev *tpm_dev;
-
- tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
-
- /* check current status */
- status = tpm_stm_i2c_status(chip);
- if ((status & mask) == mask)
- return 0;
-
- stop = jiffies + timeout;
-
- if (chip->vendor.irq) {
- cur_intrs = tpm_dev->intrs;
- interrupt = clear_interruption(tpm_dev);
- enable_irq(chip->vendor.irq);
-
-again:
- timeout = stop - jiffies;
- if ((long) timeout <= 0)
- return -1;
-
- ret = wait_event_interruptible_timeout(*queue,
- cur_intrs != tpm_dev->intrs, timeout);
-
- interrupt |= clear_interruption(tpm_dev);
- status = interrupt_to_status(interrupt);
- condition = wait_for_tpm_stat_cond(chip, mask,
- check_cancel, &canceled);
-
- if (ret >= 0 && condition) {
- if (canceled)
- return -ECANCELED;
- return 0;
- }
- if (ret == -ERESTARTSYS && freezing(current)) {
- clear_thread_flag(TIF_SIGPENDING);
- goto again;
- }
- disable_irq_nosync(chip->vendor.irq);
-
- } else {
- do {
- msleep(TPM_TIMEOUT);
- status = chip->ops->status(chip);
- if ((status & mask) == mask)
- return 0;
- } while (time_before(jiffies, stop));
- }
-
- return -ETIME;
-} /* wait_for_stat() */
-
-/*
- * recv_data receive data
- * @param: chip, the tpm chip description
- * @param: buf, the buffer where the data are received
- * @param: count, the number of data to receive
- * @return: the number of bytes read from TPM FIFO.
- */
-static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
-{
- int size = 0, burstcnt, len, ret;
- struct tpm_stm_dev *tpm_dev;
-
- tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
-
- while (size < count &&
- wait_for_stat(chip,
- TPM_STS_DATA_AVAIL | TPM_STS_VALID,
- chip->vendor.timeout_c,
- &chip->vendor.read_queue, true) == 0) {
- burstcnt = get_burstcount(chip);
- if (burstcnt < 0)
- return burstcnt;
- len = min_t(int, burstcnt, count - size);
- ret = I2C_READ_DATA(tpm_dev, TPM_DATA_FIFO, buf + size, len);
- if (ret < 0)
- return ret;
-
- size += len;
- }
- return size;
-}
-
-/*
- * tpm_ioserirq_handler the serirq irq handler
- * @param: irq, the tpm chip description
- * @param: dev_id, the description of the chip
- * @return: the status of the handler.
- */
-static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id)
-{
- struct tpm_chip *chip = dev_id;
- struct tpm_stm_dev *tpm_dev;
-
- tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
-
- tpm_dev->intrs++;
- wake_up_interruptible(&chip->vendor.read_queue);
- disable_irq_nosync(chip->vendor.irq);
-
- return IRQ_HANDLED;
-} /* tpm_ioserirq_handler() */
-
-
-/*
- * tpm_stm_i2c_send send TPM commands through the I2C bus.
- *
- * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
- * @param: buf, the buffer to send.
- * @param: count, the number of bytes to send.
- * @return: In case of success the number of bytes sent.
- * In other case, a < 0 value describing the issue.
- */
-static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf,
- size_t len)
-{
- u32 status, i, size;
- int burstcnt = 0;
- int ret;
- u8 data;
- struct i2c_client *client;
- struct tpm_stm_dev *tpm_dev;
-
- if (!chip)
- return -EBUSY;
- if (len < TPM_HEADER_SIZE)
- return -EBUSY;
-
- tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
- client = tpm_dev->client;
-
- client->flags = 0;
-
- ret = request_locality(chip);
- if (ret < 0)
- return ret;
-
- status = tpm_stm_i2c_status(chip);
- if ((status & TPM_STS_COMMAND_READY) == 0) {
- tpm_stm_i2c_cancel(chip);
- if (wait_for_stat
- (chip, TPM_STS_COMMAND_READY, chip->vendor.timeout_b,
- &chip->vendor.read_queue, false) < 0) {
- ret = -ETIME;
- goto out_err;
- }
- }
-
- for (i = 0; i < len - 1;) {
- burstcnt = get_burstcount(chip);
- if (burstcnt < 0)
- return burstcnt;
- size = min_t(int, len - i - 1, burstcnt);
- ret = I2C_WRITE_DATA(tpm_dev, TPM_DATA_FIFO, buf + i, size);
- if (ret < 0)
- goto out_err;
-
- i += size;
- }
-
- status = tpm_stm_i2c_status(chip);
- if ((status & TPM_STS_DATA_EXPECT) == 0) {
- ret = -EIO;
- goto out_err;
- }
-
- ret = I2C_WRITE_DATA(tpm_dev, TPM_DATA_FIFO, buf + len - 1, 1);
- if (ret < 0)
- goto out_err;
-
- status = tpm_stm_i2c_status(chip);
- if ((status & TPM_STS_DATA_EXPECT) != 0) {
- ret = -EIO;
- goto out_err;
- }
-
- data = TPM_STS_GO;
- I2C_WRITE_DATA(tpm_dev, TPM_STS, &data, 1);
-
- return len;
-out_err:
- tpm_stm_i2c_cancel(chip);
- release_locality(chip);
- return ret;
-}
-
-/*
- * tpm_stm_i2c_recv received TPM response through the I2C bus.
- * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h.
- * @param: buf, the buffer to store datas.
- * @param: count, the number of bytes to send.
- * @return: In case of success the number of bytes received.
- * In other case, a < 0 value describing the issue.
- */
-static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
- size_t count)
-{
- int size = 0;
- int expected;
-
- if (!chip)
- return -EBUSY;
-
- if (count < TPM_HEADER_SIZE) {
- size = -EIO;
- goto out;
- }
-
- size = recv_data(chip, buf, TPM_HEADER_SIZE);
- if (size < TPM_HEADER_SIZE) {
- dev_err(chip->pdev, "Unable to read header\n");
- goto out;
- }
-
- expected = be32_to_cpu(*(__be32 *)(buf + 2));
- if (expected > count) {
- size = -EIO;
- goto out;
- }
-
- size += recv_data(chip, &buf[TPM_HEADER_SIZE],
- expected - TPM_HEADER_SIZE);
- if (size < expected) {
- dev_err(chip->pdev, "Unable to read remainder of result\n");
- size = -ETIME;
- goto out;
- }
-
-out:
- chip->ops->cancel(chip);
- release_locality(chip);
- return size;
-}
-
-static bool tpm_stm_i2c_req_canceled(struct tpm_chip *chip, u8 status)
-{
- return (status == TPM_STS_COMMAND_READY);
-}
-
-static const struct tpm_class_ops st_i2c_tpm = {
- .send = tpm_stm_i2c_send,
- .recv = tpm_stm_i2c_recv,
- .cancel = tpm_stm_i2c_cancel,
- .status = tpm_stm_i2c_status,
- .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
- .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
- .req_canceled = tpm_stm_i2c_req_canceled,
-};
-
-#ifdef CONFIG_OF
-static int tpm_stm_i2c_of_request_resources(struct tpm_chip *chip)
-{
- struct device_node *pp;
- struct tpm_stm_dev *tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
- struct i2c_client *client = tpm_dev->client;
- int gpio;
- int ret;
-
- pp = client->dev.of_node;
- if (!pp) {
- dev_err(chip->pdev, "No platform data\n");
- return -ENODEV;
- }
-
- /* Get GPIO from device tree */
- gpio = of_get_named_gpio(pp, "lpcpd-gpios", 0);
- if (gpio < 0) {
- dev_err(chip->pdev, "Failed to retrieve lpcpd-gpios from dts.\n");
- tpm_dev->io_lpcpd = -1;
- /*
- * lpcpd pin is not specified. This is not an issue as
- * power management can be also managed by TPM specific
- * commands. So leave with a success status code.
- */
- return 0;
- }
- /* GPIO request and configuration */
- ret = devm_gpio_request_one(&client->dev, gpio,
- GPIOF_OUT_INIT_HIGH, "TPM IO LPCPD");
- if (ret) {
- dev_err(chip->pdev, "Failed to request lpcpd pin\n");
- return -ENODEV;
- }
- tpm_dev->io_lpcpd = gpio;
-
- return 0;
-}
-#else
-static int tpm_stm_i2c_of_request_resources(struct tpm_chip *chip)
-{
- return -ENODEV;
-}
-#endif
-
-static int tpm_stm_i2c_request_resources(struct i2c_client *client,
- struct tpm_chip *chip)
-{
- struct st33zp24_platform_data *pdata;
- struct tpm_stm_dev *tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip);
- int ret;
-
- pdata = client->dev.platform_data;
- if (!pdata) {
- dev_err(chip->pdev, "No platform data\n");
- return -ENODEV;
- }
-
- /* store for late use */
- tpm_dev->io_lpcpd = pdata->io_lpcpd;
-
- if (gpio_is_valid(pdata->io_lpcpd)) {
- ret = devm_gpio_request_one(&client->dev,
- pdata->io_lpcpd, GPIOF_OUT_INIT_HIGH,
- "TPM IO_LPCPD");
- if (ret) {
- dev_err(chip->pdev, "%s : reset gpio_request failed\n",
- __FILE__);
- return ret;
- }
- }
-
- return 0;
-}
-
-/*
- * tpm_stm_i2c_probe initialize the TPM device
- * @param: client, the i2c_client drescription (TPM I2C description).
- * @param: id, the i2c_device_id struct.
- * @return: 0 in case of success.
- * -1 in other case.
- */
-static int
-tpm_stm_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
-{
- int ret;
- u8 intmask = 0;
- struct tpm_chip *chip;
- struct st33zp24_platform_data *platform_data;
- struct tpm_stm_dev *tpm_dev;
-
- if (!client) {
- pr_info("%s: i2c client is NULL. Device not accessible.\n",
- __func__);
- return -ENODEV;
- }
-
- if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
- dev_info(&client->dev, "client not i2c capable\n");
- return -ENODEV;
- }
-
- tpm_dev = devm_kzalloc(&client->dev, sizeof(struct tpm_stm_dev),
- GFP_KERNEL);
- if (!tpm_dev)
- return -ENOMEM;
-
- 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;
-
- platform_data = client->dev.platform_data;
- if (!platform_data && client->dev.of_node) {
- ret = tpm_stm_i2c_of_request_resources(chip);
- if (ret)
- goto _tpm_clean_answer;
- } else if (platform_data) {
- ret = tpm_stm_i2c_request_resources(client, chip);
- if (ret)
- goto _tpm_clean_answer;
- }
-
- chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
- chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
- chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
- chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
-
- chip->vendor.locality = LOCALITY0;
-
- if (client->irq) {
- /* INTERRUPT Setup */
- init_waitqueue_head(&chip->vendor.read_queue);
- tpm_dev->intrs = 0;
-
- if (request_locality(chip) != LOCALITY0) {
- ret = -ENODEV;
- goto _tpm_clean_answer;
- }
-
- clear_interruption(tpm_dev);
- ret = devm_request_irq(&client->dev, client->irq,
- tpm_ioserirq_handler,
- IRQF_TRIGGER_HIGH,
- "TPM SERIRQ management", chip);
- if (ret < 0) {
- dev_err(chip->pdev, "TPM SERIRQ signals %d not available\n",
- client->irq);
- goto _tpm_clean_answer;
- }
-
- intmask |= TPM_INTF_CMD_READY_INT
- | TPM_INTF_STS_VALID_INT
- | TPM_INTF_DATA_AVAIL_INT;
-
- ret = I2C_WRITE_DATA(tpm_dev, TPM_INT_ENABLE, &intmask, 1);
- if (ret < 0)
- goto _tpm_clean_answer;
-
- intmask = TPM_GLOBAL_INT_ENABLE;
- ret = I2C_WRITE_DATA(tpm_dev, (TPM_INT_ENABLE + 3),
- &intmask, 1);
- if (ret < 0)
- goto _tpm_clean_answer;
-
- chip->vendor.irq = client->irq;
-
- disable_irq_nosync(chip->vendor.irq);
-
- tpm_gen_interrupt(chip);
- }
-
- tpm_get_timeouts(chip);
- tpm_do_selftest(chip);
-
- return tpm_chip_register(chip);
-_tpm_clean_answer:
- dev_info(chip->pdev, "TPM I2C initialisation fail\n");
- return ret;
-}
-
-/*
- * tpm_stm_i2c_remove remove the TPM device
- * @param: client, the i2c_client description (TPM I2C description).
- * @return: 0 in case of success.
- */
-static int tpm_stm_i2c_remove(struct i2c_client *client)
-{
- struct tpm_chip *chip =
- (struct tpm_chip *) i2c_get_clientdata(client);
-
- if (chip)
- tpm_chip_unregister(chip);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-/*
- * tpm_stm_i2c_pm_suspend suspend the TPM device
- * @param: client, the i2c_client drescription (TPM I2C description).
- * @param: mesg, the power management message.
- * @return: 0 in case of success.
- */
-static int tpm_stm_i2c_pm_suspend(struct device *dev)
-{
- struct st33zp24_platform_data *pin_infos = dev->platform_data;
- int ret = 0;
-
- if (gpio_is_valid(pin_infos->io_lpcpd))
- gpio_set_value(pin_infos->io_lpcpd, 0);
- else
- ret = tpm_pm_suspend(dev);
-
- return ret;
-} /* tpm_stm_i2c_suspend() */
-
-/*
- * tpm_stm_i2c_pm_resume resume the TPM device
- * @param: client, the i2c_client drescription (TPM I2C description).
- * @return: 0 in case of success.
- */
-static int tpm_stm_i2c_pm_resume(struct device *dev)
-{
- struct tpm_chip *chip = dev_get_drvdata(dev);
- struct st33zp24_platform_data *pin_infos = dev->platform_data;
-
- int ret = 0;
-
- if (gpio_is_valid(pin_infos->io_lpcpd)) {
- gpio_set_value(pin_infos->io_lpcpd, 1);
- ret = wait_for_stat(chip,
- TPM_STS_VALID, chip->vendor.timeout_b,
- &chip->vendor.read_queue, false);
- } else {
- ret = tpm_pm_resume(dev);
- if (!ret)
- tpm_do_selftest(chip);
- }
- return ret;
-} /* tpm_stm_i2c_pm_resume() */
-#endif
-
-static const struct i2c_device_id tpm_stm_i2c_id[] = {
- {TPM_ST33_I2C, 0},
- {}
-};
-MODULE_DEVICE_TABLE(i2c, tpm_stm_i2c_id);
-
-#ifdef CONFIG_OF
-static const struct of_device_id of_st33zp24_i2c_match[] = {
- { .compatible = "st,st33zp24-i2c", },
- {}
-};
-MODULE_DEVICE_TABLE(of, of_st33zp24_i2c_match);
-#endif
-
-static SIMPLE_DEV_PM_OPS(tpm_stm_i2c_ops, tpm_stm_i2c_pm_suspend,
- tpm_stm_i2c_pm_resume);
-
-static struct i2c_driver tpm_stm_i2c_driver = {
- .driver = {
- .owner = THIS_MODULE,
- .name = TPM_ST33_I2C,
- .pm = &tpm_stm_i2c_ops,
- .of_match_table = of_match_ptr(of_st33zp24_i2c_match),
- },
- .probe = tpm_stm_i2c_probe,
- .remove = tpm_stm_i2c_remove,
- .id_table = tpm_stm_i2c_id
-};
-
-module_i2c_driver(tpm_stm_i2c_driver);
-
-MODULE_AUTHOR("Christophe Ricard (tpmsupport@st.com)");
-MODULE_DESCRIPTION("STM TPM I2C ST33 Driver");
-MODULE_VERSION("1.2.1");
-MODULE_LICENSE("GPL");
}
}
-static int tpm_inf_pnp_suspend(struct pnp_dev *dev, pm_message_t pm_state)
-{
- struct tpm_chip *chip = pnp_get_drvdata(dev);
- int rc;
- if (chip) {
- u8 savestate[] = {
- 0, 193, /* TPM_TAG_RQU_COMMAND */
- 0, 0, 0, 10, /* blob length (in bytes) */
- 0, 0, 0, 152 /* TPM_ORD_SaveState */
- };
- dev_info(&dev->dev, "saving TPM state\n");
- rc = tpm_inf_send(chip, savestate, sizeof(savestate));
- if (rc < 0) {
- dev_err(&dev->dev, "error while saving TPM state\n");
- return rc;
- }
- }
- return 0;
-}
-
-static int tpm_inf_pnp_resume(struct pnp_dev *dev)
+#ifdef CONFIG_PM_SLEEP
+static int tpm_inf_resume(struct device *dev)
{
/* Re-configure TPM after suspending */
tpm_config_out(ENABLE_REGISTER_PAIR, TPM_INF_ADDR);
tpm_config_out(DISABLE_REGISTER_PAIR, TPM_INF_ADDR);
/* disable RESET, LP and IRQC */
tpm_data_out(RESET_LP_IRQC_DISABLE, CMD);
- return tpm_pm_resume(&dev->dev);
+ return tpm_pm_resume(dev);
}
+#endif
+static SIMPLE_DEV_PM_OPS(tpm_inf_pm, tpm_pm_suspend, tpm_inf_resume);
static struct pnp_driver tpm_inf_pnp_driver = {
.name = "tpm_inf_pnp",
.id_table = tpm_inf_pnp_tbl,
.probe = tpm_inf_pnp_probe,
- .suspend = tpm_inf_pnp_suspend,
- .resume = tpm_inf_pnp_resume,
- .remove = tpm_inf_pnp_remove
+ .remove = tpm_inf_pnp_remove,
+ .driver = {
+ .pm = &tpm_inf_pm,
+ }
};
module_pnp_driver(tpm_inf_pnp_driver);
/*
- * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
- * Copyright (C) 2009, 2010 STMicroelectronics
+ * STMicroelectronics TPM Linux driver for TPM 1.2 ST33ZP24
+ * Copyright (C) 2009 - 2015 STMicroelectronics
*
* 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
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
- *
- * STMicroelectronics version 1.2.0, Copyright (C) 2010
- * STMicroelectronics comes with ABSOLUTELY NO WARRANTY.
- * This is free software, and you are welcome to redistribute it
- * under certain conditions.
- *
- * @Author: Christophe RICARD tpmsupport@st.com
- *
- * @File: stm_st33_tpm.h
- *
- * @Date: 09/15/2010
*/
-#ifndef __STM_ST33_TPM_H__
-#define __STM_ST33_TPM_H__
+#ifndef __ST33ZP24_H__
+#define __ST33ZP24_H__
#define TPM_ST33_I2C "st33zp24-i2c"
#define TPM_ST33_SPI "st33zp24-spi"
int io_lpcpd;
};
-#endif /* __STM_ST33_TPM_H__ */
+#endif /* __ST33ZP24_H__ */
#define SMK_INODE_INSTANT 0x01 /* inode is instantiated */
#define SMK_INODE_TRANSMUTE 0x02 /* directory is transmuting */
#define SMK_INODE_CHANGED 0x04 /* smack was transmuted */
+#define SMK_INODE_IMPURE 0x08 /* involved in an impure transaction */
/*
* A label access rule.
#define MAY_LOCK 0x00002000 /* Locks should be writes, but ... */
#define MAY_BRINGUP 0x00004000 /* Report use of this rule */
+#define SMACK_BRINGUP_ALLOW 1 /* Allow bringup mode */
+#define SMACK_UNCONFINED_SUBJECT 2 /* Allow unconfined label */
+#define SMACK_UNCONFINED_OBJECT 3 /* Allow unconfined label */
+
/*
* Just to make the common cases easier to deal with
*/
extern struct smack_known *smack_net_ambient;
extern struct smack_known *smack_onlycap;
extern struct smack_known *smack_syslog_label;
+#ifdef CONFIG_SECURITY_SMACK_BRINGUP
+extern struct smack_known *smack_unconfined;
+#endif
extern struct smack_known smack_cipso_option;
extern int smack_ptrace_rule;
/*
* Hardcoded comparisons.
- *
+ */
+ /*
* A star subject can't access any object.
*/
if (subject == &smack_known_star) {
* succeed because of "b" rules.
*/
if (may & MAY_BRINGUP)
- rc = MAY_BRINGUP;
+ rc = SMACK_BRINGUP_ALLOW;
#endif
out_audit:
+
+#ifdef CONFIG_SECURITY_SMACK_BRINGUP
+ if (rc < 0) {
+ if (object == smack_unconfined)
+ rc = SMACK_UNCONFINED_OBJECT;
+ if (subject == smack_unconfined)
+ rc = SMACK_UNCONFINED_SUBJECT;
+ }
+#endif
+
#ifdef CONFIG_AUDIT
if (a)
smack_log(subject->smk_known, object->smk_known,
void smack_log(char *subject_label, char *object_label, int request,
int result, struct smk_audit_info *ad)
{
+#ifdef CONFIG_SECURITY_SMACK_BRINGUP
+ char request_buffer[SMK_NUM_ACCESS_TYPE + 5];
+#else
char request_buffer[SMK_NUM_ACCESS_TYPE + 1];
+#endif
struct smack_audit_data *sad;
struct common_audit_data *a = &ad->a;
-#ifdef CONFIG_SECURITY_SMACK_BRINGUP
- /*
- * The result may be positive in bringup mode.
- */
- if (result > 0)
- result = 0;
-#endif
/* check if we have to log the current event */
- if (result != 0 && (log_policy & SMACK_AUDIT_DENIED) == 0)
+ if (result < 0 && (log_policy & SMACK_AUDIT_DENIED) == 0)
return;
if (result == 0 && (log_policy & SMACK_AUDIT_ACCEPT) == 0)
return;
smack_str_from_perm(request_buffer, request);
sad->subject = subject_label;
sad->object = object_label;
+#ifdef CONFIG_SECURITY_SMACK_BRINGUP
+ /*
+ * The result may be positive in bringup mode.
+ * A positive result is an allow, but not for normal reasons.
+ * Mark it as successful, but don't filter it out even if
+ * the logging policy says to do so.
+ */
+ if (result == SMACK_UNCONFINED_SUBJECT)
+ strcat(request_buffer, "(US)");
+ else if (result == SMACK_UNCONFINED_OBJECT)
+ strcat(request_buffer, "(UO)");
+
+ if (result > 0)
+ result = 0;
+#endif
sad->request = request_buffer;
sad->result = result;
int smack_enabled;
#ifdef CONFIG_SECURITY_SMACK_BRINGUP
+static char *smk_bu_mess[] = {
+ "Bringup Error", /* Unused */
+ "Bringup", /* SMACK_BRINGUP_ALLOW */
+ "Unconfined Subject", /* SMACK_UNCONFINED_SUBJECT */
+ "Unconfined Object", /* SMACK_UNCONFINED_OBJECT */
+};
+
static void smk_bu_mode(int mode, char *s)
{
int i = 0;
if (rc <= 0)
return rc;
+ if (rc > SMACK_UNCONFINED_OBJECT)
+ rc = 0;
smk_bu_mode(mode, acc);
- pr_info("Smack Bringup: (%s %s %s) %s\n",
+ pr_info("Smack %s: (%s %s %s) %s\n", smk_bu_mess[rc],
sskp->smk_known, oskp->smk_known, acc, note);
return 0;
}
if (rc <= 0)
return rc;
+ if (rc > SMACK_UNCONFINED_OBJECT)
+ rc = 0;
smk_bu_mode(mode, acc);
- pr_info("Smack Bringup: (%s %s %s) %s %s\n",
+ pr_info("Smack %s: (%s %s %s) %s %s\n", smk_bu_mess[rc],
tsp->smk_task->smk_known, oskp->smk_known,
acc, current->comm, note);
return 0;
if (rc <= 0)
return rc;
+ if (rc > SMACK_UNCONFINED_OBJECT)
+ rc = 0;
smk_bu_mode(mode, acc);
- pr_info("Smack Bringup: (%s %s %s) %s to %s\n",
+ pr_info("Smack %s: (%s %s %s) %s to %s\n", smk_bu_mess[rc],
tsp->smk_task->smk_known, smk_task->smk_known, acc,
current->comm, otp->comm);
return 0;
static int smk_bu_inode(struct inode *inode, int mode, int rc)
{
struct task_smack *tsp = current_security();
+ struct inode_smack *isp = inode->i_security;
char acc[SMK_NUM_ACCESS_TYPE + 1];
+ if (isp->smk_flags & SMK_INODE_IMPURE)
+ pr_info("Smack Unconfined Corruption: inode=(%s %ld) %s\n",
+ inode->i_sb->s_id, inode->i_ino, current->comm);
+
if (rc <= 0)
return rc;
+ if (rc > SMACK_UNCONFINED_OBJECT)
+ rc = 0;
+ if (rc == SMACK_UNCONFINED_SUBJECT &&
+ (mode & (MAY_WRITE | MAY_APPEND)))
+ isp->smk_flags |= SMK_INODE_IMPURE;
smk_bu_mode(mode, acc);
- pr_info("Smack Bringup: (%s %s %s) inode=(%s %ld) %s\n",
- tsp->smk_task->smk_known, smk_of_inode(inode)->smk_known, acc,
+
+ pr_info("Smack %s: (%s %s %s) inode=(%s %ld) %s\n", smk_bu_mess[rc],
+ tsp->smk_task->smk_known, isp->smk_inode->smk_known, acc,
inode->i_sb->s_id, inode->i_ino, current->comm);
return 0;
}
struct task_smack *tsp = current_security();
struct smack_known *sskp = tsp->smk_task;
struct inode *inode = file_inode(file);
+ struct inode_smack *isp = inode->i_security;
char acc[SMK_NUM_ACCESS_TYPE + 1];
+ if (isp->smk_flags & SMK_INODE_IMPURE)
+ pr_info("Smack Unconfined Corruption: inode=(%s %ld) %s\n",
+ inode->i_sb->s_id, inode->i_ino, current->comm);
+
if (rc <= 0)
return rc;
+ if (rc > SMACK_UNCONFINED_OBJECT)
+ rc = 0;
smk_bu_mode(mode, acc);
- pr_info("Smack Bringup: (%s %s %s) file=(%s %ld %pD) %s\n",
+ pr_info("Smack %s: (%s %s %s) file=(%s %ld %pD) %s\n", smk_bu_mess[rc],
sskp->smk_known, smk_of_inode(inode)->smk_known, acc,
inode->i_sb->s_id, inode->i_ino, file,
current->comm);
struct task_smack *tsp = cred->security;
struct smack_known *sskp = tsp->smk_task;
struct inode *inode = file->f_inode;
+ struct inode_smack *isp = inode->i_security;
char acc[SMK_NUM_ACCESS_TYPE + 1];
+ if (isp->smk_flags & SMK_INODE_IMPURE)
+ pr_info("Smack Unconfined Corruption: inode=(%s %ld) %s\n",
+ inode->i_sb->s_id, inode->i_ino, current->comm);
+
if (rc <= 0)
return rc;
+ if (rc > SMACK_UNCONFINED_OBJECT)
+ rc = 0;
smk_bu_mode(mode, acc);
- pr_info("Smack Bringup: (%s %s %s) file=(%s %ld %pD) %s\n",
+ pr_info("Smack %s: (%s %s %s) file=(%s %ld %pD) %s\n", smk_bu_mess[rc],
sskp->smk_known, smk_of_inode(inode)->smk_known, acc,
inode->i_sb->s_id, inode->i_ino, file,
current->comm);
static int smack_socket_post_create(struct socket *sock, int family,
int type, int protocol, int kern)
{
- if (family != PF_INET || sock->sk == NULL)
+ struct socket_smack *ssp;
+
+ if (sock->sk == NULL)
+ return 0;
+
+ /*
+ * Sockets created by kernel threads receive web label.
+ */
+ if (unlikely(current->flags & PF_KTHREAD)) {
+ ssp = sock->sk->sk_security;
+ ssp->smk_in = &smack_known_web;
+ ssp->smk_out = &smack_known_web;
+ }
+
+ if (family != PF_INET)
return 0;
/*
* Set the outbound netlbl.
rc = smk_bu_note("key access", tkp, keyp->security, request, rc);
return rc;
}
+
+/*
+ * smack_key_getsecurity - Smack label tagging the key
+ * @key points to the key to be queried
+ * @_buffer points to a pointer that should be set to point to the
+ * resulting string (if no label or an error occurs).
+ * Return the length of the string (including terminating NUL) or -ve if
+ * an error.
+ * May also return 0 (and a NULL buffer pointer) if there is no label.
+ */
+static int smack_key_getsecurity(struct key *key, char **_buffer)
+{
+ struct smack_known *skp = key->security;
+ size_t length;
+ char *copy;
+
+ if (key->security == NULL) {
+ *_buffer = NULL;
+ return 0;
+ }
+
+ copy = kstrdup(skp->smk_known, GFP_KERNEL);
+ if (copy == NULL)
+ return -ENOMEM;
+ length = strlen(copy) + 1;
+
+ *_buffer = copy;
+ return length;
+}
+
#endif /* CONFIG_KEYS */
/*
.key_alloc = smack_key_alloc,
.key_free = smack_key_free,
.key_permission = smack_key_permission,
+ .key_getsecurity = smack_key_getsecurity,
#endif /* CONFIG_KEYS */
/* Audit hooks */
SMK_CHANGE_RULE = 19, /* change or add rules (long labels) */
SMK_SYSLOG = 20, /* change syslog label) */
SMK_PTRACE = 21, /* set ptrace rule */
+#ifdef CONFIG_SECURITY_SMACK_BRINGUP
+ SMK_UNCONFINED = 22, /* define an unconfined label */
+#endif
};
/*
*/
static DEFINE_MUTEX(smack_cipso_lock);
static DEFINE_MUTEX(smack_ambient_lock);
-static DEFINE_MUTEX(smack_syslog_lock);
static DEFINE_MUTEX(smk_netlbladdr_lock);
/*
*/
struct smack_known *smack_onlycap;
+#ifdef CONFIG_SECURITY_SMACK_BRINGUP
+/*
+ * Allow one label to be unconfined. This is for
+ * debugging and application bring-up purposes only.
+ * It is bad and wrong, but everyone seems to expect
+ * to have it.
+ */
+struct smack_known *smack_unconfined;
+#endif
+
/*
* If this value is set restrict syslog use to the label specified.
* It can be reset via smackfs/syslog
.llseek = default_llseek,
};
+#ifdef CONFIG_SECURITY_SMACK_BRINGUP
+/**
+ * smk_read_unconfined - read() for smackfs/unconfined
+ * @filp: file pointer, not actually used
+ * @buf: where to put the result
+ * @cn: maximum to send along
+ * @ppos: where to start
+ *
+ * Returns number of bytes read or error code, as appropriate
+ */
+static ssize_t smk_read_unconfined(struct file *filp, char __user *buf,
+ size_t cn, loff_t *ppos)
+{
+ char *smack = "";
+ ssize_t rc = -EINVAL;
+ int asize;
+
+ if (*ppos != 0)
+ return 0;
+
+ if (smack_unconfined != NULL)
+ smack = smack_unconfined->smk_known;
+
+ asize = strlen(smack) + 1;
+
+ if (cn >= asize)
+ rc = simple_read_from_buffer(buf, cn, ppos, smack, asize);
+
+ return rc;
+}
+
+/**
+ * smk_write_unconfined - write() for smackfs/unconfined
+ * @file: file pointer, not actually used
+ * @buf: where to get the data from
+ * @count: bytes sent
+ * @ppos: where to start
+ *
+ * Returns number of bytes written or error code, as appropriate
+ */
+static ssize_t smk_write_unconfined(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char *data;
+ int rc = count;
+
+ if (!smack_privileged(CAP_MAC_ADMIN))
+ return -EPERM;
+
+ data = kzalloc(count + 1, GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+
+ /*
+ * Should the null string be passed in unset the unconfined value.
+ * This seems like something to be careful with as usually
+ * smk_import only expects to return NULL for errors. It
+ * is usually the case that a nullstring or "\n" would be
+ * bad to pass to smk_import but in fact this is useful here.
+ *
+ * smk_import will also reject a label beginning with '-',
+ * so "-confine" will also work.
+ */
+ if (copy_from_user(data, buf, count) != 0)
+ rc = -EFAULT;
+ else
+ smack_unconfined = smk_import_entry(data, count);
+
+ kfree(data);
+ return rc;
+}
+
+static const struct file_operations smk_unconfined_ops = {
+ .read = smk_read_unconfined,
+ .write = smk_write_unconfined,
+ .llseek = default_llseek,
+};
+#endif /* CONFIG_SECURITY_SMACK_BRINGUP */
+
/**
* smk_read_logging - read() for /smack/logging
* @filp: file pointer, not actually used
"syslog", &smk_syslog_ops, S_IRUGO|S_IWUSR},
[SMK_PTRACE] = {
"ptrace", &smk_ptrace_ops, S_IRUGO|S_IWUSR},
+#ifdef CONFIG_SECURITY_SMACK_BRINGUP
+ [SMK_UNCONFINED] = {
+ "unconfined", &smk_unconfined_ops, S_IRUGO|S_IWUSR},
+#endif
/* last one */
{""}
};
config SECURITY_YAMA
bool "Yama support"
depends on SECURITY
- select SECURITYFS
- select SECURITY_PATH
default n
help
This selects Yama, which extends DAC support with additional
static int yama_dointvec_minmax(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
- int rc;
+ struct ctl_table table_copy;
if (write && !capable(CAP_SYS_PTRACE))
return -EPERM;
- rc = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
- if (rc)
- return rc;
-
/* Lock the max value if it ever gets set. */
- if (write && *(int *)table->data == *(int *)table->extra2)
- table->extra1 = table->extra2;
+ table_copy = *table;
+ if (*(int *)table_copy.data == *(int *)table_copy.extra2)
+ table_copy.extra1 = table_copy.extra2;
- return rc;
+ return proc_dointvec_minmax(&table_copy, write, buffer, lenp, ppos);
}
static int zero;
projects / karo-tx-linux.git / commitdiff