Re: [tpmdd-devel] [PATCH 1/1] TPM: STMicroelectronics ST33 I2C KERNEL 3.x.x

[Kent Yoder <key@linux.vnet.ibm.com>]

On Wed, Nov 28, 2012 at 06:48:57PM +0100, Mathias LEBLANC wrote:
> Ok, so i have patch the ST33 I2C driver on this branch and correct some errors.
> I send you the patch for the kernel 3.x 
> I have no error on compilation, tell me if you have problems.
> I have implemented the tpm_do_selftest function to get the tpm ready, but it can be removed

 This looks like its base64 encoded...

> ________________________________________
> From: Kent Yoder [shpedoikal@gmail.com]
> Sent: 28 November 2012 16:31
> To: Mathias LEBLANC
> Cc: Kent Yoder; Jean-Luc BLANC; linux-kernel@vger.kernel.org; Rajiv Andrade; tpmdd-devel@lists.sourceforge.net; Sirrix AG
> Subject: Re: [tpmdd-devel] [PATCH 1/1] TPM: STMicroelectronics ST33 I2C KERNEL 3.x.x
> 
> On Wed, Nov 28, 2012 at 2:54 AM, Mathias LEBLANC <Mathias.LEBLANC@st.com> wrote:
> > Hi Kent,
> >
> > I have been tried the patch on your linux branch and indeed, i have an error about tpm_continue_seftest.
> > What is the kernel I should use to test officially my patch? Because i saw a lot of different version of linux kernel with the tpm_continue_seftest function.
> > I used this repo git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 for my tests.
> 
>   The tree url I sent you is the correct one. Make sure you use the
> "next" branch.
> 
> Kent
> 
> > Matthias Leblanc
> >
> > ________________________________________From: Kent Yoder [shpedoikal@gmail.com]
> > Sent: 27 November 2012 15:48
> > To: Mathias LEBLANC
> > Cc: Kent Yoder; Jean-Luc BLANC; linux-kernel@vger.kernel.org; Rajiv Andrade; tpmdd-devel@lists.sourceforge.net; Sirrix AG
> > Subject: Re: [tpmdd-devel] [PATCH 1/1] TPM: STMicroelectronics ST33 I2C KERNEL 3.x.x
> >
> > On Tue, Nov 27, 2012 at 2:44 AM, Mathias LEBLANC <Mathias.LEBLANC@st.com> wrote:
> >> Hi Kent,
> >>
> >> What's version of the kernel do you compiled?
> >> I don't understand why you have some problem with formating, i have send you the patch with no error and warning of code formating.
> >> The tpm_continue_selftest_nocheck()  (in kernel 3.x.x) and tpm_continue_selftest() (in kernel 2.6.x) is called to have the tpm ready.
> >> If the tpm_continue_selftest is not called by the driver, it will be use in the applications.
> >
> > Apply against this tree's "next" branch.
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git
> >
> > Thanks,
> > Kent
> >
> >> Regards,
> >>
> >> Matthias Leblanc
> >> ________________________________________
> >> From: Kent Yoder [key@linux.vnet.ibm.com]
> >> Sent: 26 November 2012 18:46
> >> To: Mathias LEBLANC
> >> Cc: Rajiv Andrade; Marcel Selhorst; Sirrix AG; tpmdd-devel@lists.sourceforge.net; Debora Velarde; linux-kernel@vger.kernel.org; Jean-Luc BLANC
> >> Subject: Re: [PATCH 1/1] TPM: STMicroelectronics ST33 I2C KERNEL 3.x.x
> >>
> >> Hi Mathias,
> >>
> >> On Mon, Nov 19, 2012 at 11:15:21PM +0100, Mathias Leblanc wrote:
> >>>  * 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.
> >>
> >>> This is the driver for TPM chip from ST Microelectronics.
> >>>
> >>> If you have a TPM security chip from STMicroelectronics working with
> >>> an I2C, in menuconfig or .config choose the tpm driver on
> >>> device --> tpm and activate the protocol of your choice before compiling
> >>> the kernel.
> >>> The driver will be accessible from within Linux.
> >>>
> >>> Tested on linux x86/x64, beagleboard REV B & XM REV C and CHROMIUM OS
> >>> on kernel 3.x.x
> >>>
> >>> Signed-off-by: Mathias Leblanc <mathias.leblanc@st.com>
> >>> ---
> >>>  drivers/char/tpm/tpm_stm_st33_i2c.c  |  903 ++++++++++++++++++++++++++++++++++
> >>>  drivers/char/tpm/tpm_stm_st33_i2c.h  |   81 +++
> >>>  include/linux/i2c/tpm_stm_st33_i2c.h |   47 ++
> >>>  3 files changed, 1031 insertions(+)
> >>>  create mode 100644 drivers/char/tpm/tpm_stm_st33_i2c.c
> >>>  create mode 100644 drivers/char/tpm/tpm_stm_st33_i2c.h
> >>>  create mode 100644 include/linux/i2c/tpm_stm_st33_i2c.h
> >>
> >>   I'm still getting the compiler errors I mentioned earlier. I've fixed
> >> them up with the patch below (plus some formatting), all except for the
> >> tpm_continue_selftest_nocheck() problem. Do you really need to call
> >> continue selftest on resume?  That strikes me as out of place here.
> >> What's making the call to the TPM to start the self test in that case?
> >>
> >> Please test with the patch below.
> >>
> >> Thanks,
> >> Kent
> >>
> >>
> >> diff --git a/drivers/char/tpm/tpm_stm_st33_i2c.c b/drivers/char/tpm/tpm_stm_st33_i2c.c
> >> index 52f3380..67f81b6 100644
> >> --- a/drivers/char/tpm/tpm_stm_st33_i2c.c
> >> +++ b/drivers/char/tpm/tpm_stm_st33_i2c.c
> >> @@ -722,7 +722,7 @@ tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
> >>                         goto _irq_set;
> >>
> >>                 intmask = TPM_GLOBAL_INT_ENABLE;
> >> -               err = I2C_WRITE_DATA(client, TPM_INT_ENABLE + 3, &intmask, 1);
> >> +               err = I2C_WRITE_DATA(client, (TPM_INT_ENABLE + 3), &intmask, 1);
> >>                 if (err < 0)
> >>                         goto _irq_set;
> >>
> >> @@ -820,10 +820,10 @@ static int tpm_st33_i2c_pm_suspend(struct i2c_client *client, pm_message_t mesg)
> >>
> >>         if (power_mgt)
> >>                 gpio_set_value(pin_infos->io_lpcpd, 0);
> >> -       else{
> >> +       else {
> >>                 if (chip->data_buffer == NULL)
> >>                         chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
> >> -               ret = tpm_pm_suspend(&client->dev, mesg);
> >> +               ret = tpm_pm_suspend(&client->dev);
> >>         }
> >>         return ret;
> >>  }                              /* tpm_st33_i2c_suspend() */
> >> @@ -848,12 +848,12 @@ static int tpm_st33_i2c_pm_resume(struct i2c_client *client)
> >>                                           (chip->vendor.status(chip) &&
> >>                                           TPM_STS_VALID) == TPM_STS_VALID,
> >>                                           chip->vendor.timeout_b);
> >> -       } else{
> >> -       if (chip->data_buffer == NULL)
> >> -               chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
> >> -       ret = tpm_pm_resume(&client->dev);
> >> -       if (!ret)
> >> -               tpm_continue_selftest_nocheck(chip);
> >> +       } else {
> >> +               if (chip->data_buffer == NULL)
> >> +                       chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
> >> +               ret = tpm_pm_resume(&client->dev);
> >> +               if (!ret)
> >> +                       tpm_continue_selftest_nocheck(chip);
> >>         }
> >>         return ret;
> >>  }                              /* tpm_st33_i2c_pm_resume() */
> >>
> >> ------------------------------------------------------------------------------
> >> Monitor your physical, virtual and cloud infrastructure from a single
> >> web console. Get in-depth insight into apps, servers, databases, vmware,
> >> SAP, cloud infrastructure, etc. Download 30-day Free Trial.
> >> Pricing starts from $795 for 25 servers or applications!
> >> http://p.sf.net/sfu/zoho_dev2dev_nov
> >> _______________________________________________
> >> tpmdd-devel mailing list
> >> tpmdd-devel@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
> >
> >
> >
> > --
> > IBM LTC Security
> 
> 
> 
> --
> IBM LTC Security

> From 3cf4687665a0bcffe89de92416f0d5886a90100f Mon Sep 17 00:00:00 2001
> From: Mathias Leblanc <mathias.leblanc@st.com>
> Date: Wed, 28 Nov 2012 18:22:24 +0100
> Subject: [PATCH 1/1] TPM: STMicroelectronics ST33 I2C KERNEL 3.x
> 
>  * 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.
> 
> This is the driver for TPM chip from ST Microelectronics.
> 
> If you have a TPM security chip from STMicroelectronics working with
> an I2C, in menuconfig or .config choose the tpm driver on
> device --> tpm and activate the protocol of your choice before compiling
> the kernel.
> The driver will be accessible from within Linux.
> 
> Tested on linux x86/x64 on kernel 3.x
> 
> Signed-off-by: Mathias Leblanc <mathias.leblanc@st.com>
> ---
>  drivers/char/tpm/tpm_stm_st33_i2c.c  |  903 ++++++++++++++++++++++++++++++++++
>  drivers/char/tpm/tpm_stm_st33_i2c.h  |   81 +++
>  include/linux/i2c/tpm_stm_st33_i2c.h |   47 ++
>  3 files changed, 1031 insertions(+)
>  create mode 100644 drivers/char/tpm/tpm_stm_st33_i2c.c
>  create mode 100644 drivers/char/tpm/tpm_stm_st33_i2c.h
>  create mode 100644 include/linux/i2c/tpm_stm_st33_i2c.h
> 
> diff --git a/drivers/char/tpm/tpm_stm_st33_i2c.c b/drivers/char/tpm/tpm_stm_st33_i2c.c
> new file mode 100644
> index 0000000..32cdd5e
> --- /dev/null
> +++ b/drivers/char/tpm/tpm_stm_st33_i2c.c
> @@ -0,0 +1,903 @@
> +/*
> + * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
> + * Copyright (C) 2009, 2010  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, write to the Free Software Foundation, Inc.,
> + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
> + *
> + * 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: tpm_stm_st33_i2c.c
> + *
> + * @Synopsis:
> + *	09/15/2010:	First shot driver tpm_tis driver for
> +			 lpc is used as model.
> + */
> +
> +#include <linux/i2c/tpm_stm_st33_i2c.h>
> +
> +#include "tpm_stm_st33_i2c.h"
> +
> +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,
> +};
> +
> +/*
> + * 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 i2c_client *client, u8 tpm_register,
> +		      u8 *tpm_data, u16 tpm_size)
> +{
> +	u8 data;
> +	int value = 0;
> +	struct st33zp24_platform_data *pin_infos;
> +
> +	pin_infos = client->dev.platform_data;
> +
> +	data = tpm_register;
> +	memcpy(pin_infos->tpm_i2c_buffer[0], &data, sizeof(data));
> +	memcpy(pin_infos->tpm_i2c_buffer[0] + 1, tpm_data, tpm_size);
> +	value = i2c_master_send(client, pin_infos->tpm_i2c_buffer[0],
> +				tpm_size + 1);
> +	return value;
> +} /* 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 i2c_client *client, u8 tpm_register,
> +		    u8 *tpm_data, int tpm_size)
> +{
> +	u8 status = 0;
> +	u8 data;
> +	struct st33zp24_platform_data *pin_infos;
> +
> +	pin_infos = client->dev.platform_data;
> +
> +	data = TPM_DUMMY_BYTE;
> +	status = write8_reg(client, tpm_register, &data, 1);
> +	if (status == 2)
> +		status = i2c_master_recv(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: client, 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(client, tpm_register, tpm_data, tpm_size) \
> +	(write8_reg(client, 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, 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(client, tpm_register, tpm_data, tpm_size) \
> +	(read8_reg(client, tpm_register, tpm_data, tpm_size))
> +
> +/*
> + * clear_interruption
> + * clear the TPM interrupt register.
> + * @param: tpm, the chip description
> + */
> +static void clear_interruption(struct i2c_client *client)
> +{
> +	u8 interrupt;
> +	I2C_READ_DATA(client, TPM_INT_STATUS, &interrupt, 1);
> +	I2C_WRITE_DATA(client, TPM_INT_STATUS, &interrupt, 1);
> +	I2C_READ_DATA(client, TPM_INT_STATUS, &interrupt, 1);
> +} /* clear_interruption() */
> +
> +/*
> + * _wait_for_interrupt_serirq_timeout
> + * @param: tpm, the chip description
> + * @param: timeout, the timeout of the interrupt
> + * @return: the status of the interruption.
> + */
> +static long _wait_for_interrupt_serirq_timeout(struct tpm_chip *chip,
> +						unsigned long timeout)
> +{
> +	long status;
> +	struct i2c_client *client;
> +	struct st33zp24_platform_data *pin_infos;
> +
> +	client = (struct i2c_client *) chip->vendor.iobase;
> +	pin_infos = client->dev.platform_data;
> +
> +	status = wait_for_completion_interruptible_timeout(
> +					&pin_infos->irq_detection,
> +						timeout);
> +	if (status > 0)
> +		enable_irq(gpio_to_irq(pin_infos->io_serirq));
> +	gpio_direction_input(pin_infos->io_serirq);
> +
> +	return status;
> +} /* wait_for_interrupt_serirq_timeout() */
> +
> +int wait_for_serirq_timeout(struct tpm_chip *chip, bool condition,
> +				 unsigned long timeout)
> +{
> +	int status = 2;
> +	struct i2c_client *client;
> +	struct st33zp24_platform_data *pin_infos;
> +
> +	client = (struct i2c_client *) chip->vendor.iobase;
> +	pin_infos = client->dev.platform_data;
> +
> +	status = _wait_for_interrupt_serirq_timeout(chip, timeout);
> +	if (!status) {
> +		status = -EBUSY;
> +	} else{
> +		clear_interruption(client);
> +		if (condition)
> +			status = 1;
> +	}
> +	return status;
> +}
> +
> +/*
> + * 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 i2c_client *client;
> +	u8 data;
> +
> +	client = (struct i2c_client *) chip->vendor.iobase;
> +
> +	data = TPM_STS_COMMAND_READY;
> +	I2C_WRITE_DATA(client, TPM_STS, &data, 1);
> +	if (chip->vendor.irq)
> +		wait_for_serirq_timeout(chip, 1, chip->vendor.timeout_a);
> +}	/* 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 i2c_client *client;
> +	u8 data;
> +	client = (struct i2c_client *) chip->vendor.iobase;
> +
> +	I2C_READ_DATA(client, 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 i2c_client *client;
> +	u8 data;
> +	u8 status;
> +
> +	client = (struct i2c_client *) chip->vendor.iobase;
> +
> +	status = I2C_READ_DATA(client, 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 rc;
> +	struct i2c_client *client;
> +	u8 data;
> +
> +	client = (struct i2c_client *) chip->vendor.iobase;
> +
> +	if (check_locality(chip) == chip->vendor.locality)
> +		return chip->vendor.locality;
> +
> +	data = TPM_ACCESS_REQUEST_USE;
> +	rc = I2C_WRITE_DATA(client, TPM_ACCESS, &data, 1);
> +	if (rc < 0)
> +		goto end;
> +
> +	if (chip->vendor.irq) {
> +		rc = wait_for_serirq_timeout(chip, (check_locality
> +						       (chip) >= 0),
> +						      chip->vendor.timeout_a);
> +		if (rc > 0)
> +			return chip->vendor.locality;
> +	} else{
> +		stop = jiffies + chip->vendor.timeout_a;
> +		do {
> +			if (check_locality(chip) >= 0)
> +				return chip->vendor.locality;
> +			msleep(TPM_TIMEOUT);
> +		} while (time_before(jiffies, stop));
> +	}
> +	rc = -EACCES;
> +end:
> +	return rc;
> +} /* request_locality() */
> +
> +/*
> + * release_locality release the active locality
> + * @param: chip, the tpm chip description.
> + */
> +static void release_locality(struct tpm_chip *chip)
> +{
> +	struct i2c_client *client;
> +	u8 data;
> +
> +	client = (struct i2c_client *) chip->vendor.iobase;
> +	data = TPM_ACCESS_ACTIVE_LOCALITY;
> +
> +	I2C_WRITE_DATA(client, 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 i2c_client *client = (struct i2c_client *) chip->vendor.iobase;
> +
> +	stop = jiffies + chip->vendor.timeout_d;
> +	do {
> +		tpm_reg = TPM_STS + 1;
> +		status = I2C_READ_DATA(client, tpm_reg, &temp, 1);
> +		if (status < 0)
> +			goto end;
> +
> +		tpm_reg = tpm_reg + 1;
> +		burstcnt = temp;
> +		status = I2C_READ_DATA(client, 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() */
> +
> +/*
> + * 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.
> + * @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)
> +{
> +	unsigned long stop;
> +	long rc;
> +	u8 status;
> +
> +	 if (chip->vendor.irq) {
> +		rc = wait_for_serirq_timeout(chip, ((tpm_stm_i2c_status
> +							(chip) & mask) ==
> +						       mask), timeout);
> +		if (rc > 0)
> +			return 0;
> +	} else{
> +		stop = jiffies + timeout;
> +		do {
> +			msleep(TPM_TIMEOUT);
> +			status = tpm_stm_i2c_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;
> +	struct i2c_client *client;
> +
> +	client = (struct i2c_client *) chip->vendor.iobase;
> +
> +	while (size < count &&
> +	       wait_for_stat(chip,
> +			     TPM_STS_DATA_AVAIL | TPM_STS_VALID,
> +			     chip->vendor.timeout_c,
> +			     &chip->vendor.read_queue)
> +	       == 0) {
> +		burstcnt = get_burstcount(chip);
> +		len = min_t(int, burstcnt, count - size);
> +		I2C_READ_DATA(client, TPM_DATA_FIFO, buf + size, len);
> +		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 i2c_client *client;
> +	struct st33zp24_platform_data *pin_infos;
> +
> +	disable_irq_nosync(irq);
> +
> +	client = (struct i2c_client *) chip->vendor.iobase;
> +	pin_infos = client->dev.platform_data;
> +
> +	complete(&pin_infos->irq_detection);
> +	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 ret = 0, ordinal,
> +	    status,
> +	    burstcnt = 0, i, size;
> +	u8 data;
> +	struct i2c_client *client;
> +	struct st33zp24_platform_data *pin_infos;
> +
> +	if (chip == NULL)
> +		return -EBUSY;
> +	if (len < TPM_HEADER_SIZE)
> +		return -EBUSY;
> +
> +	client = (struct i2c_client *)chip->vendor.iobase;
> +	pin_infos = client->dev.platform_data;
> +
> +	ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
> +
> +	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.int_queue) < 0) {
> +			ret = -ETIME;
> +			goto out_err;
> +		}
> +	}
> +
> +	for (i = 0 ; i < len - 1 ;) {
> +		burstcnt = get_burstcount(chip);
> +		size = min_t(int, len - i - 1, burstcnt);
> +		ret = I2C_WRITE_DATA(client, TPM_DATA_FIFO, buf, 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(client, 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(client, 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;
> +
> +	struct i2c_client *client;
> +	struct st33zp24_platform_data *pin_infos;
> +
> +	client = (struct i2c_client *)chip->vendor.iobase;
> +	pin_infos = client->dev.platform_data;
> +
> +
> +	if (chip == NULL)
> +		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;
> +		goto out;
> +	}
> +
> +out:
> +	chip->vendor.cancel(chip);
> +	release_locality(chip);
> +	return size;
> +}
> +
> +static const struct file_operations tpm_st33_i2c_fops = {
> +	.owner = THIS_MODULE,
> +	.llseek = no_llseek,
> +	.read = tpm_read,
> +	.write = tpm_write,
> +	.open = tpm_open,
> +	.release = tpm_release,
> +};
> +
> +static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
> +static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
> +static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
> +static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
> +static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
> +static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated, NULL);
> +static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps_1_2, NULL);
> +static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
> +
> +static struct attribute *stm_tpm_attrs[] = {
> +	&dev_attr_pubek.attr,
> +	&dev_attr_pcrs.attr,
> +	&dev_attr_enabled.attr,
> +	&dev_attr_active.attr,
> +	&dev_attr_owned.attr,
> +	&dev_attr_temp_deactivated.attr,
> +	&dev_attr_caps.attr,
> +	&dev_attr_cancel.attr, NULL,
> +};
> +
> +static struct attribute_group stm_tpm_attr_grp = {
> +	.attrs = stm_tpm_attrs
> +};
> +
> +static struct tpm_vendor_specific 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_STS_COMMAND_READY,
> +	.attr_group = &stm_tpm_attr_grp,
> +	.miscdev = {.fops = &tpm_st33_i2c_fops,},
> +};
> +
> +static int interrupts ;
> +module_param(interrupts, int, 0444);
> +MODULE_PARM_DESC(interrupts, "Enable interrupts");
> +
> +static int power_mgt = 1;
> +module_param(power_mgt, int, 0444);
> +MODULE_PARM_DESC(power_mgt, "Power Management");
> +
> +/*
> + * tpm_st33_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_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
> +{
> +	u32 err;
> +	u8 intmask;
> +	struct tpm_chip *chip;
> +	struct st33zp24_platform_data *platform_data;
> +
> +	err = 0;
> +
> +	if (client == NULL) {
> +		dev_info(&client->dev, "client is NULL. exiting.\n");
> +		err = -ENODEV;
> +		goto end;
> +	}
> +
> +	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
> +		dev_info(&client->dev, "client not i2c capable\n");
> +		err = -ENODEV;
> +		goto end;
> +	}
> +
> +	chip = tpm_register_hardware(&client->dev, &st_i2c_tpm);
> +	if (!chip) {
> +		dev_info(&client->dev, "fail chip\n");
> +		err = -ENODEV;
> +		goto end;
> +	}
> +
> +	platform_data = client->dev.platform_data;
> +	platform_data->tpm_i2c_buffer[0] =
> +	    kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL);
> +	if (platform_data->tpm_i2c_buffer[0] == NULL) {
> +		err = -ENOMEM;
> +		goto _tpm_clean_answer;
> +	}
> +	platform_data->tpm_i2c_buffer[1] =
> +	    kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL);
> +	if (platform_data->tpm_i2c_buffer[1] == NULL) {
> +		err = -ENOMEM;
> +		goto _tpm_clean_response;
> +	}
> +
> +	chip->vendor.iobase = client;
> +
> +	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 (power_mgt) {
> +		err = gpio_request(platform_data->io_lpcpd, "TPM IO_LPCPD");
> +		if (err)
> +			goto _gpio_init1;
> +		gpio_set_value(platform_data->io_lpcpd, 1);
> +	}
> +
> +	if (interrupts) {
> +		init_completion(&platform_data->irq_detection);
> +		if (request_locality(chip) != LOCALITY0) {
> +			err = -ENODEV;
> +			goto _tpm_clean_response;
> +		}
> +		err = gpio_request(platform_data->io_serirq, "TPM IO_SERIRQ");
> +		if (err)
> +			goto _gpio_init2;
> +
> +		clear_interruption(client);
> +		err = request_irq(gpio_to_irq(platform_data->io_serirq),
> +				&tpm_ioserirq_handler,
> +				IRQF_TRIGGER_HIGH,
> +				"TPM SERIRQ management", chip);
> +		if (err < 0) {
> +			dev_err(chip->dev , "TPM SERIRQ signals %d not available\n",
> +			gpio_to_irq(platform_data->io_serirq));
> +			goto _irq_set;
> +		}
> +
> +		err = I2C_READ_DATA(client, TPM_INT_ENABLE, &intmask, 1);
> +		if (err < 0)
> +			goto _irq_set;
> +
> +		intmask |= TPM_INTF_CMD_READY_INT
> +			|  TPM_INTF_FIFO_AVALAIBLE_INT
> +			|  TPM_INTF_WAKE_UP_READY_INT
> +			|  TPM_INTF_LOCALITY_CHANGE_INT
> +			|  TPM_INTF_STS_VALID_INT
> +			|  TPM_INTF_DATA_AVAIL_INT;
> +
> +		err = I2C_WRITE_DATA(client, TPM_INT_ENABLE, &intmask, 1);
> +		if (err < 0)
> +			goto _irq_set;
> +
> +		intmask = TPM_GLOBAL_INT_ENABLE;
> +		err = I2C_WRITE_DATA(client, (TPM_INT_ENABLE + 3), &intmask, 1);
> +		if (err < 0)
> +			goto _irq_set;
> +
> +		err = I2C_READ_DATA(client, TPM_INT_STATUS, &intmask, 1);
> +		if (err < 0)
> +			goto _irq_set;
> +
> +		chip->vendor.irq = interrupts;
> +
> +		tpm_gen_interrupt(chip);
> +	}
> +
> +	tpm_get_timeouts(chip);
> +
> +	i2c_set_clientdata(client, chip);
> +	platform_data->bChipF = false;
> +
> +	dev_info(chip->dev, "TPM I2C Initialized\n");
> +	return 0;
> +_irq_set:
> +	free_irq(gpio_to_irq(platform_data->io_serirq), (void *) chip);
> +_gpio_init2:
> +	if (platform_data && interrupts)
> +		gpio_free(platform_data->io_serirq);
> +_gpio_init1:
> +	if (platform_data && power_mgt)
> +		gpio_free(platform_data->io_lpcpd);
> +_tpm_clean_response:
> +	tpm_remove_hardware(chip->dev);
> +	if (platform_data->tpm_i2c_buffer[1] != NULL) {
> +		kzfree(platform_data->tpm_i2c_buffer[1]);
> +		platform_data->tpm_i2c_buffer[1] = NULL;
> +	}
> +_tpm_clean_answer:
> +	if (platform_data->tpm_i2c_buffer[0] != NULL) {
> +		kzfree(platform_data->tpm_i2c_buffer[0]);
> +		platform_data->tpm_i2c_buffer[0] = NULL;
> +	}
> +
> +	platform_data->bChipF = true;
> +end:
> +	pr_info("TPM I2C initialisation fail\n");
> +	return err;
> +}
> +
> +/*
> + * tpm_st33_i2c_remove remove the TPM device
> + * @param: client, the i2c_client drescription (TPM I2C description).
> +		clear_bit(0, &chip->is_open);
> + * @return: 0 in case of success.
> + */
> +static __devexit int tpm_st33_i2c_remove(struct i2c_client *client)
> +{
> +	struct tpm_chip *chip = (struct tpm_chip *)i2c_get_clientdata(client);
> +	struct st33zp24_platform_data *pin_infos =
> +		((struct i2c_client *) chip->vendor.iobase)->dev.platform_data;
> +
> +	if (pin_infos != NULL) {
> +		free_irq(pin_infos->io_serirq, chip);
> +
> +		gpio_free(pin_infos->io_serirq);
> +		gpio_free(pin_infos->io_lpcpd);
> +
> +		if (pin_infos->bChipF != true)
> +			tpm_remove_hardware(chip->dev);
> +		if (pin_infos->tpm_i2c_buffer[1] != NULL) {
> +			kzfree(pin_infos->tpm_i2c_buffer[1]);
> +			pin_infos->tpm_i2c_buffer[1] = NULL;
> +		}
> +		if (pin_infos->tpm_i2c_buffer[0] != NULL) {
> +			kzfree(pin_infos->tpm_i2c_buffer[0]);
> +			pin_infos->tpm_i2c_buffer[0] = NULL;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +/*
> + * tpm_st33_i2c_pm_suspend suspend the TPM device
> + * Added: Work around when suspend and no tpm application is running, suspend
> + * may fail because chip->data_buffer is not set (only set in tpm_open in Linux
> + * TPM core)
> + * @param: client, the i2c_client drescription (TPM I2C description).
> + * @param: mesg, the power management message.
> + * @return: 0 in case of success.
> + */
> +static int tpm_st33_i2c_pm_suspend(struct i2c_client *client, pm_message_t mesg)
> +{
> +	struct tpm_chip *chip =
> +	    (struct tpm_chip *)i2c_get_clientdata(client);
> +	struct st33zp24_platform_data *pin_infos =
> +		((struct i2c_client *)chip->vendor.iobase)->dev.platform_data;
> +	int ret = 0;
> +
> +	if (power_mgt)
> +		gpio_set_value(pin_infos->io_lpcpd, 0);
> +	else{
> +		if (chip->data_buffer == NULL)
> +			chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
> +		ret = tpm_pm_suspend(&client->dev);
> +	}
> +	return ret;
> +}				/* tpm_st33_i2c_suspend() */
> +
> +/*
> + * tpm_st33_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_st33_i2c_pm_resume(struct i2c_client *client)
> +{
> +	struct tpm_chip *chip =
> +	    (struct tpm_chip *)i2c_get_clientdata(client);
> +	struct st33zp24_platform_data *pin_infos =
> +		((struct i2c_client *)chip->vendor.iobase)->dev.platform_data;
> +
> +	int ret = 0;
> +
> +	if (power_mgt) {
> +		gpio_set_value(pin_infos->io_lpcpd, 1);
> +		ret = wait_for_serirq_timeout(chip,
> +					  (chip->vendor.status(chip) &&
> +					  TPM_STS_VALID) == TPM_STS_VALID,
> +					  chip->vendor.timeout_b);
> +	} else{
> +	if (chip->data_buffer == NULL)
> +		chip->data_buffer = pin_infos->tpm_i2c_buffer[0];
> +	ret = tpm_pm_resume(&client->dev);
> +	if (!ret)
> +		tpm_do_selftest(chip);
> +	}
> +	return ret;
> +}				/* tpm_st33_i2c_pm_resume() */
> +
> +static const struct i2c_device_id tpm_st33_i2c_id[] = {
> +	{TPM_ST33_I2C, 0},
> +	{}
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, tpm_st33_i2c_id);
> +
> +static struct i2c_driver tpm_st33_i2c_driver = {
> +	.driver = {
> +		   .owner = THIS_MODULE,
> +		   .name = TPM_ST33_I2C,
> +		   },
> +	.probe = tpm_st33_i2c_probe,
> +	.remove = tpm_st33_i2c_remove,
> +	.resume = tpm_st33_i2c_pm_resume,
> +	.suspend = tpm_st33_i2c_pm_suspend,
> +	.id_table = tpm_st33_i2c_id
> +};
> +
> +/*
> + * tpm_st33_i2c_init initialize driver
> + * @return: 0 if successful, else non zero value.
> + */
> +static int __init tpm_st33_i2c_init(void)
> +{
> +	return i2c_add_driver(&tpm_st33_i2c_driver);
> +}
> +
> +/*
> + * tpm_st33_i2c_exit The kernel calls this function during unloading the
> + * module or during shut down process
> + */
> +static void __exit tpm_st33_i2c_exit(void)
> +{
> +	i2c_del_driver(&tpm_st33_i2c_driver);
> +}
> +
> +module_init(tpm_st33_i2c_init);
> +module_exit(tpm_st33_i2c_exit);
> +
> +MODULE_AUTHOR("Christophe Ricard (tpmsupport@st.com)");
> +MODULE_DESCRIPTION("STM TPM I2C ST33 Driver");
> +MODULE_VERSION("1.2.0");
> diff --git a/drivers/char/tpm/tpm_stm_st33_i2c.h b/drivers/char/tpm/tpm_stm_st33_i2c.h
> new file mode 100644
> index 0000000..d390542
> --- /dev/null
> +++ b/drivers/char/tpm/tpm_stm_st33_i2c.h
> @@ -0,0 +1,81 @@
> +/*
> + * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
> + * Copyright (C) 2009, 2010  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, write to the Free Software Foundation, Inc.,
> + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
> + *
> + * 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_i2c.h
> + *
> + * @Date: 09/15/2010
> + */
> +#ifndef __STM_ST33_TPM_I2C_MAIN_H__
> +#define __STM_ST33_TPM_I2C_MAIN_H__
> +
> +#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/module.h>
> +#include <linux/kernel.h>
> +#include <linux/delay.h>
> +#include <linux/init.h>
> +#include <linux/wait.h>
> +#include <linux/string.h>
> +#include <linux/interrupt.h>
> +#include <linux/spinlock.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/sched.h>
> +
> +#include "tpm.h"
> +
> +#define MINOR_NUM_I2C		224
> +
> +#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
> +
> +struct st_tpm_hash {
> +	int size;
> +	u8 *data;
> +};
> +
> +#endif /* __STM_ST33_TPM_I2C_MAIN_H__ */
> diff --git a/include/linux/i2c/tpm_stm_st33_i2c.h b/include/linux/i2c/tpm_stm_st33_i2c.h
> new file mode 100644
> index 0000000..e3ce42d
> --- /dev/null
> +++ b/include/linux/i2c/tpm_stm_st33_i2c.h
> @@ -0,0 +1,47 @@
> +/*
> +* STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
> +* Copyright (C) 2009, 2010 STMicroelectronics
> +* Christophe RICARD tpmsupport@st.com
> +* 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, write to the Free Software Foundation, Inc.,
> +* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
> +*
> +* 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.
> +*
> +* @File: stm_st33_tpm_i2c.h
> +*
> +* @Date: 06/15/2008
> +*/
> +#ifndef __STM_ST33_TPM_I2C_H__
> +#define __STM_ST33_TPM_I2C_H__
> +
> +#include <linux/i2c.h>
> +
> +#define TPM_ST33_I2C			"st33zp24_i2c"
> +#define TPM_I2C_ST33_ADDR_WR_LOC0	(0x26 >> 1)
> +
> +
> +struct st33zp24_platform_data {
> +	int io_serirq;
> +	int io_lpcpd;
> +	struct i2c_client *client;
> +	bool bChipF;
> +	u8 *tpm_i2c_buffer[2]; /* 0 Request 1 Response */
> +	struct completion irq_detection;
> +	struct mutex lock;
> +};
> +
> +#endif /* __STM_ST33_TPM_I2C_H__ */
> -- 
> 1.7.9.5
>