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Message-ID: <20121128190438.GA15399@ennui.austin.ibm.com>
Date: Wed, 28 Nov 2012 13:04:38 -0600
From: Kent Yoder <key@...ux.vnet.ibm.com>
To: Mathias LEBLANC <Mathias.LEBLANC@...com>
Cc: Kent Yoder <shpedoikal@...il.com>,
Jean-Luc BLANC <jean-luc.blanc@...com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Rajiv Andrade <mail@...jiv.net>,
"tpmdd-devel@...ts.sourceforge.net"
<tpmdd-devel@...ts.sourceforge.net>, Sirrix AG <tpmdd@...rix.com>
Subject: Re: [tpmdd-devel] [PATCH 1/1] TPM: STMicroelectronics ST33 I2C
KERNEL 3.x.x
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@...il.com]
> Sent: 28 November 2012 16:31
> To: Mathias LEBLANC
> Cc: Kent Yoder; Jean-Luc BLANC; linux-kernel@...r.kernel.org; Rajiv Andrade; tpmdd-devel@...ts.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@...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@...il.com]
> > Sent: 27 November 2012 15:48
> > To: Mathias LEBLANC
> > Cc: Kent Yoder; Jean-Luc BLANC; linux-kernel@...r.kernel.org; Rajiv Andrade; tpmdd-devel@...ts.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@...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@...ux.vnet.ibm.com]
> >> Sent: 26 November 2012 18:46
> >> To: Mathias LEBLANC
> >> Cc: Rajiv Andrade; Marcel Selhorst; Sirrix AG; tpmdd-devel@...ts.sourceforge.net; Debora Velarde; linux-kernel@...r.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@...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@...ts.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@...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@...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@...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@...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@...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@...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
>
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