Re: [tpmdd-devel] [PATCH 1/1] TPM: STMicroelectronics st33 driver SPI
From: Kent Yoder
Date: Mon May 13 2013 - 11:57:03 EST
Hi Mathias,
On Mon, May 13, 2013 at 10:30 AM, Mathias LEBLANC
<Mathias.LEBLANC@xxxxxx> wrote:
> Hi Kent,
>
> I have tried different compilation command and I haven't these errors.
> What's the command you do to generate these warning?
I used the smatch tool, which you can get from sourceforge, with
some instructions, here: http://smatch.sourceforge.net/.
Kent
> However, these warning will be corrected in the next patch and the others too.
>
> Regards,
>
> Mathias Leblanc
>
> -----Original Message-----
> From: Kent Yoder [mailto:shpedoikal@xxxxxxxxx]
> Sent: 10 May, 2013 17:07
> To: Mathias LEBLANC
> Cc: Kent Yoder; Rajiv Andrade; Marcel Selhorst; Sirrix AG; TPM Device Driver List; Jean-Luc BLANC; linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: [tpmdd-devel] [PATCH 1/1] TPM: STMicroelectronics st33 driver SPI
>
> On Fri, May 10, 2013 at 8:38 AM, Kent Yoder <shpedoikal@xxxxxxxxx> wrote:
>> Hi Mathias,
>
> Sorry, this note got sent before I was done somehow...
>
> A few compile warnings left:
>
> drivers/char/tpm/tpm_spi_stm_st33.c: In function 'tpm_stm_spi_status':
> drivers/char/tpm/tpm_spi_stm_st33.c:289:2: error: 'data' is used uninitialized in this function [-Werror=uninitialized]
> drivers/char/tpm/tpm_spi_stm_st33.c: In function 'get_burstcount':
> drivers/char/tpm/tpm_spi_stm_st33.c:386:12: error: 'temp' is used uninitialized in this function [-Werror=uninitialized]
> drivers/char/tpm/tpm_spi_stm_st33.c: In function 'check_locality':
> drivers/char/tpm/tpm_spi_stm_st33.c:305:22: error: 'data' may be used uninitialized in this function [-Werror=uninitialized]
>
> And smatch warnings:
>
> drivers/char/tpm/tpm_spi_stm_st33.c:247 wait_for_serirq_timeout()
> error: 'wait_for_completion_interruptible_timeout()' returns negative and 'status' is unsigned
> drivers/char/tpm/tpm_spi_stm_st33.c:382 get_burstcount() warn:
> unsigned 'status' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:388 get_burstcount() warn:
> unsigned 'status' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:459 recv_data() warn: unsigned 'status' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:508 tpm_stm_spi_send() warn:
> unsigned 'ret' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:526 tpm_stm_spi_send() warn:
> unsigned 'ret' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:549 tpm_stm_spi_send() warn:
> unsigned 'ret' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:772 tpm_st33_spi_probe() warn:
> unsigned 'err' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:778 tpm_st33_spi_probe() warn:
> unsigned 'err' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:790 tpm_st33_spi_probe() warn:
> unsigned 'err' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:795 tpm_st33_spi_probe() warn:
> unsigned 'err' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:799 tpm_st33_spi_probe() warn:
> unsigned 'err' is never less than zero.
> drivers/char/tpm/tpm_spi_stm_st33.c:818 tpm_st33_spi_probe() warn:
> variable dereferenced before check 'platform_data' (see line 717)
>
> And again this patch is getting its last 2 lines clipped in tpm_spi_stm_st33.c. Please look below for where to put the ChangeLog info.
>
> Just as an FYI, I probably am not going to reply to repeat anything I've said above for future submissions. We're really going around in circles here. :-/
>
> Kent
>
>> On Tue, May 07, 2013 at 12:16:05PM +0200, Matthias Leblanc wrote:
>>> From: Mathias Leblanc <mathias.leblanc@xxxxxx>
>>>
>>> * 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 SPI, 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 and beagleboard REV B & XM REV C
>>>
>>> Changelog:
>>>
>>> date: 07-05-2013
>>> Remove unused variables
>>> Remove tpm_st33_spi_exit function that cause compilation error
>>>
>>> Signed-off-by: Mathias Leblanc <mathias.leblanc@xxxxxx>
>>> ---
>>
>> ChangeLog goes in here.
>>
>>> drivers/char/tpm/Kconfig | 10 +
>>> drivers/char/tpm/Makefile | 1 +
>>> drivers/char/tpm/tpm_spi_stm_st33.c | 939 +++++++++++++++++++++++++++++++++++
>>> drivers/char/tpm/tpm_spi_stm_st33.h | 61 +++
>>> 4 files changed, 1011 insertions(+), 0 deletions(-) create mode
>>> 100644 drivers/char/tpm/tpm_spi_stm_st33.c
>>> create mode 100644 drivers/char/tpm/tpm_spi_stm_st33.h
>>>
>>> diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
>>> index dbfd564..2fc1254 100644
>>> --- a/drivers/char/tpm/Kconfig
>>> +++ b/drivers/char/tpm/Kconfig
>>> @@ -91,4 +91,14 @@ config TCG_ST33_I2C
>>> To compile this driver as a module, choose M here; the module will be
>>> called tpm_stm_st33_i2c.
>>>
>>> +config TCG_ST33_SPI
>>> + tristate "STMicroelectronics ST33 SPI"
>>> + depends on SPI
>>> + depends on GPIOLIB
>>> + ---help---
>>> + If you have a TPM security chip from STMicroelectronics working with
>>> + an SPI 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_stm_st33_spi.
>>> +
>>> endif # TCG_TPM
>>> diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
>>> index a3736c9..a1db3dd 100644
>>> --- a/drivers/char/tpm/Makefile
>>> +++ b/drivers/char/tpm/Makefile
>>> @@ -18,3 +18,4 @@ obj-$(CONFIG_TCG_ATMEL) += tpm_atmel.o
>>> obj-$(CONFIG_TCG_INFINEON) += tpm_infineon.o
>>> obj-$(CONFIG_TCG_IBMVTPM) += tpm_ibmvtpm.o
>>> obj-$(CONFIG_TCG_ST33_I2C) += tpm_i2c_stm_st33.o
>>> +obj-$(CONFIG_TCG_ST33_SPI) += tpm_spi_stm_st33.o
>>> diff --git a/drivers/char/tpm/tpm_spi_stm_st33.c
>>> b/drivers/char/tpm/tpm_spi_stm_st33.c
>>> new file mode 100644
>>> index 0000000..9279dc0
>>> --- /dev/null
>>> +++ b/drivers/char/tpm/tpm_spi_stm_st33.c
>>> @@ -0,0 +1,939 @@
>>> +/*
>>> + * STMicroelectronics TPM SPI 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@xxxxxx
>>> + *
>>> + * @File: tpm_stm_st33_spi.c
>>> + *
>>> + * @Synopsis:
>>> + * 09/15/2010: First shot driver tpm_tis driver for lpc is
>>> + * used as model.
>>> + */
>>> +
>>> +#include <linux/kernel.h>
>>> +#include <linux/init.h>
>>> +#include <linux/spi/spi.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/uaccess.h>
>>> +#include <linux/slab.h>
>>> +#include <linux/sched.h>
>>> +
>>> +#include "tpm.h"
>>> +
>>> +#include "tpm_spi_stm_st33.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_LOC4SOFTRELEASE_INT = 0x008,
>>> + 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, /* ms */
>>> + TIS_LONG_TIMEOUT = 2000, /* 2 sec */
>>> +};
>>> +
>>> +
>>> +static inline int spi_read_write(struct spi_device *spi,
>>> + struct spi_transfer xfer) {
>>> + struct spi_message msg;
>>> + spi_message_init(&msg);
>>> + spi_message_add_tail(&xfer, &msg);
>>> + return spi_sync(spi, &msg);
>>> +}
>>> +
>>> +/*
>>> + * spi_write8_reg
>>> + * Send byte to the TIS register according to the ST33ZP24 SPI protocol.
>>> + * @param: tpm, 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: should be zero if success else a negative error code.
>>> + */
>>> +static int spi_write8_reg(struct tpm_chip *tpm, u8 tpm_register,
>>> + u8 *tpm_data, u16 tpm_size) {
>>> + u8 data;
>>> + int total_length = 0, nbr_dummy_bytes;
>>> + int value = 0;
>>> + struct spi_device *dev = (struct spi_device *)tpm->vendor.iobase;
>>> + struct st33zp24_platform_data *platform_data = dev->dev.platform_data;
>>> + u8 *data_buffer = platform_data->tpm_spi_buffer[0];
>>> + struct spi_transfer xfer = {
>>> + .tx_buf = data_buffer,
>>> + .rx_buf = platform_data->tpm_spi_buffer[1],
>>> + };
>>> +
>>> + u8 latency = platform_data->latency + tpm_size + 1;
>>> +
>>> + /* Pre-Header */
>>> + data = TPM_WRITE_DIRECTION | tpm->vendor.locality;
>>> + memcpy(data_buffer + total_length, &data, sizeof(data));
>>> + total_length++;
>>> + data = tpm_register;
>>> + memcpy(data_buffer + total_length, &data, sizeof(data));
>>> + total_length++;
>>> +
>>> + if (tpm_size > 0 &&
>>> + (tpm_register == TPM_DATA_FIFO ||
>>> + tpm_register == TPM_HASH_DATA)) {
>>> + data = (tpm_size >> 8) & 0x00ff;
>>> + data_buffer[total_length++] = data;
>>> + data = tpm_size & 0x00ff;
>>> + data_buffer[total_length++] = data;
>>> + latency -= 2;
>>> + }
>>> +
>>> + memcpy(&data_buffer[total_length], tpm_data, tpm_size);
>>> + total_length += tpm_size;
>>> +
>>> + nbr_dummy_bytes = platform_data->latency + 1;
>>> + memset(&data_buffer[total_length], TPM_DUMMY_BYTE,
>>> + platform_data->latency + 1);
>>> +
>>> + xfer.len = total_length;
>>> +
>>> + value = spi_read_write(dev, xfer);
>>> +
>>> + if (value == 0) {
>>> + nbr_dummy_bytes = total_length - 1 - nbr_dummy_bytes;
>>> + while (nbr_dummy_bytes < total_length &&
>>> + ((u8 *)xfer.rx_buf)[nbr_dummy_bytes] == 0)
>>> + nbr_dummy_bytes++;
>>> +
>>> + if (((u8 *)xfer.rx_buf)[nbr_dummy_bytes] != 0)
>>> + value = ((u8 *)xfer.rx_buf)[nbr_dummy_bytes];
>>> + }
>>> +
>>> + return value;
>>> +} /* spi_write8_reg() */
>>> +
>>> +/*
>>> + * spi_read8_reg
>>> + * Recv byte from the TIS register according to the ST33ZP24 SPI 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: should be zero if success else a negative error code.
>>> + */
>>> +static u8 spi_read8_reg(struct tpm_chip *tpm, u8 tpm_register,
>>> + u8 *tpm_data, u16 tpm_size) {
>>> + u8 data;
>>> + int total_length = 0, nbr_dummy_bytes;
>>> + int value = 0;
>>> + struct spi_device *dev = (struct spi_device *)tpm->vendor.iobase;
>>> + struct st33zp24_platform_data *platform_data = dev->dev.platform_data;
>>> + u8 *data_buffer = platform_data->tpm_spi_buffer[0];
>>> + struct spi_transfer xfer = {
>>> + .tx_buf = data_buffer,
>>> + .rx_buf = platform_data->tpm_spi_buffer[1],
>>> + };
>>> +
>>> + /* Pre-Header */
>>> +
>>> + data = tpm->vendor.locality;
>>> + memcpy(data_buffer + total_length, &data, sizeof(data));
>>> + total_length++;
>>> + data = tpm_register;
>>> + memcpy(data_buffer + total_length, &data, sizeof(data));
>>> + total_length++;
>>> +
>>> + nbr_dummy_bytes = platform_data->latency + 1;
>>> + memset(&data_buffer[total_length], TPM_DUMMY_BYTE,
>>> + platform_data->latency + 1);
>>> +
>>> + xfer.len = total_length;
>>> +
>>> + /* header + status byte + size of the data + status byte */
>>> + value = spi_read_write(dev, xfer);
>>> +
>>> + if (tpm_size > 0 && value == 0) {
>>> + nbr_dummy_bytes = 2;
>>> + for (; nbr_dummy_bytes < total_length &&
>>> + ((u8 *)xfer.rx_buf)[nbr_dummy_bytes] == 0;
>>> + nbr_dummy_bytes++)
>>> + ;
>>> +
>>> + if (nbr_dummy_bytes + 1 < total_length) {
>>> + value = ((u8 *)xfer.rx_buf)[nbr_dummy_bytes];
>>> +
>>> + if (tpm_size > 0)
>>> + memcpy(tpm_data, xfer.rx_buf +
>>> + nbr_dummy_bytes + 1,
>>> + tpm_size);
>>> + }
>>> + }
>>> + return value;
>>> +} /* spi_read8_reg() */
>>> +
>>> +/*
>>> + * clear_interruption
>>> + * clear the TPM interrupt register.
>>> + * @param: tpm, the chip description */ static void
>>> +clear_interruption(struct tpm_chip *tpm) {
>>> + u8 interrupt;
>>> + spi_read8_reg(tpm, TPM_INT_STATUS, &interrupt, 1);
>>> + /* Clear interrupts handled with TPM_EOI */
>>> + spi_write8_reg(tpm, TPM_INT_STATUS, &interrupt, 1);
>>> + spi_read8_reg(tpm, TPM_INT_STATUS, &interrupt, 1); } /*
>>> +clear_interruption() */
>>> +
>>> +/*
>>> + * _wait_for_serirq_timeout
>>> + * @param: tpm, the chip description
>>> + * @param: timeout, the timeout of the interrupt
>>> + * @return: the status of the interruption.
>>> + */
>>> +unsigned long wait_for_serirq_timeout(struct tpm_chip *chip, bool condition,
>>> + unsigned long timeout) {
>>> + unsigned long status;
>>> + struct spi_device *client;
>>> + struct st33zp24_platform_data *pin_infos;
>>> +
>>> + client = (struct spi_device *)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);
>>> +
>>> + if (!status) {
>>> + status = -EBUSY;
>>> + goto wait_end;
>>> + }
>>> + clear_interruption(chip);
>>> + if (condition)
>>> + status = 1;
>>> +
>>> +wait_end:
>>> + return status;
>>> +}
>>> +
>>> +
>>> +/*
>>> + * tpm_stm_spi_cancel, cancel is not implemented.
>>> + * @param: chip, the tpm chip description as specified in
>>> + * driver/char/tpm/tpm.h.
>>> + */
>>> +static void tpm_stm_spi_cancel(struct tpm_chip *chip) {
>>> + u8 data = TPM_STS_COMMAND_READY;
>>> +
>>> + /* this causes the current command to be aborted */
>>> + spi_write8_reg(chip, TPM_STS, &data, 1); } /*
>>> +tpm_stm_spi_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_spi_status(struct tpm_chip *chip) {
>>> + u8 data;
>>> +
>>> + spi_read8_reg(chip, TPM_STS, &data, 1);
>>> + return data;
>>> +} /* tpm_stm_spi_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) {
>>> + u8 data;
>>> + u8 status;
>>> +
>>> + status = spi_read8_reg(chip, 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;
>>> + u8 data;
>>> +
>>> + /* Check locality */
>>> + if (check_locality(chip) == chip->vendor.locality)
>>> + return chip->vendor.locality;
>>> +
>>> + /* Request locality */
>>> + data = TPM_ACCESS_REQUEST_USE;
>>> + rc = spi_write8_reg(chip, TPM_ACCESS, &data, 1);
>>> + if (rc < 0)
>>> + goto end;
>>> +
>>> + /* wait for burstcount */
>>> + 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));
>>> + }
>>> +end:
>>> + return -EACCES;
>>> +} /* request_locality() */
>>> +
>>> +/*
>>> + * release_locality release the active locality
>>> + * @param: chip, the tpm chip description.
>>> + */
>>> +static void release_locality(struct tpm_chip *chip) {
>>> + u8 data;
>>> +
>>> + data = TPM_ACCESS_ACTIVE_LOCALITY;
>>> + spi_write8_reg(chip, TPM_ACCESS, &data, 1); } /*
>>> +release_locality()*/
>>> +
>>> +/*
>>> + * 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;
>>> + u32 burstcnt, status;
>>> + u8 tpm_reg, temp;
>>> +
>>> + /* wait for burstcount */
>>> + /* which timeout value, spec has 2 answers (c & d) */
>>> + stop = jiffies + chip->vendor.timeout_d;
>>> + do {
>>> + tpm_reg = TPM_STS + 1;
>>> + status = spi_read8_reg(chip, tpm_reg, &temp, 1);
>>> + if (status < 0)
>>> + goto end;
>>> +
>>> + tpm_reg = tpm_reg + 1;
>>> + burstcnt = temp;
>>> + status = spi_read8_reg(chip, 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;
>>> +
>>> + /* check current status */
>>> + status = tpm_stm_spi_status(chip);
>>> + if (!chip->vendor.irq && (status & mask) == mask)
>>> + return 0;
>>> +
>>> + if (chip->vendor.irq) {
>>> + rc = wait_for_serirq_timeout(chip, ((tpm_stm_spi_status
>>> + (chip) & mask) ==
>>> + mask), timeout);
>>> + if (rc > 0)
>>> + return 0;
>>> + } else {
>>> + stop = jiffies + timeout;
>>> + do {
>>> + msleep(TPM_TIMEOUT);
>>> + status = tpm_stm_spi_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 tpm status, 0 if success, -ETIME if timeout is reached.
>>> + */
>>> +static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count) {
>>> + u32 size = 0, burstcnt, status, len;
>>> +
>>> + 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);
>>> + status = spi_read8_reg(chip, TPM_DATA_FIFO, buf + size, len);
>>> + if (status < 0)
>>> + return status;
>>> +
>>> +
>>> + 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 spi_device *client;
>>> + struct st33zp24_platform_data *pin_infos;
>>> +
>>> + disable_irq_nosync(irq);
>>> +
>>> + client = (struct spi_device *)chip->vendor.iobase;
>>> + pin_infos = client->dev.platform_data;
>>> +
>>> + complete(&pin_infos->irq_detection);
>>> + return IRQ_HANDLED;
>>> +} /* tpm_ioserirq_handler() */
>>> +
>>> +/*
>>> + * tpm_stm_spi_send send TPM commands through the SPI bus.
>>> + * @param: chip, the tpm chip description
>>> + * @param: buf, the tpm command buffer
>>> + * @param: len, the tpm command size
>>> + * @return: should be zero if success else the negative error code.
>>> + */
>>> +static int tpm_stm_spi_send(struct tpm_chip *chip, unsigned char *buf,
>>> + size_t len) {
>>> + u32 ret = 0, status, burstcnt = 0, i, size = 0;
>>> + u8 data;
>>> +
>>> + if (chip == NULL)
>>> + return -EBUSY;
>>> + if (len < TPM_HEADER_SIZE)
>>> + return -EBUSY;
>>> +
>>> + ret = request_locality(chip);
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> + status = tpm_stm_spi_status(chip);
>>> + if ((status & TPM_STS_COMMAND_READY) == 0) {
>>> + tpm_stm_spi_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 = spi_write8_reg(chip, TPM_DATA_FIFO, buf, size);
>>> + if (ret < 0)
>>> + goto out_err;
>>> + i += size;
>>> + }
>>> +
>>> + status = tpm_stm_spi_status(chip);
>>> + if ((status & TPM_STS_DATA_EXPECT) == 0) {
>>> + ret = -EIO;
>>> + goto out_err;
>>> + }
>>> +
>>> + /* write last byte */
>>> + spi_write8_reg(chip, TPM_DATA_FIFO, buf + len - 1, 1);
>>> +
>>> + status = tpm_stm_spi_status(chip);
>>> + if ((status & TPM_STS_DATA_EXPECT) != 0) {
>>> + ret = -EIO;
>>> + goto out_err;
>>> + }
>>> +
>>> + /* go and do it */
>>> + data = TPM_STS_GO;
>>> + ret = spi_write8_reg(chip, TPM_STS, &data, 1);
>>> + if (ret < 0)
>>> + goto out_err;
>>> +
>>> + return len;
>>> +out_err:
>>> + tpm_stm_spi_cancel(chip);
>>> + release_locality(chip);
>>> + return ret;
>>> +}
>>> +
>>> +/*
>>> + * tpm_stm_spi_recv received TPM response through the SPI bus.
>>> + * @param: chip, the tpm chip description
>>> + * @param: buf, the tpm command buffer
>>> + * @param: len, the tpm command size
>>> +* @return: should be zero if success else the negative error code.
>>> + */
>>> +static int tpm_stm_spi_recv(struct tpm_chip *chip, unsigned char *buf,
>>> + size_t count) {
>>> + int size = 0;
>>> + int expected;
>>> +
>>> + if (chip == NULL)
>>> + return -EBUSY;
>>> + if (count < TPM_HEADER_SIZE) {
>>> + size = -EIO;
>>> + goto out;
>>> + }
>>> +
>>> + size = recv_data(chip, buf, TPM_HEADER_SIZE);
>>> +
>>> + /* read first 10 bytes, including tag, paramsize, and result */
>>> + 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_spi_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_spi_tpm = {
>>> + .send = tpm_stm_spi_send,
>>> + .recv = tpm_stm_spi_recv,
>>> + .cancel = tpm_stm_spi_cancel,
>>> + .status = tpm_stm_spi_status,
>>> + .attr_group = &stm_tpm_attr_grp,
>>> + .miscdev = {.fops = &tpm_st33_spi_fops,}, };
>>> +
>>> +static int evaluate_latency(struct tpm_chip *chip) {
>>> + int latency = 0;
>>> + struct spi_device *dev = (struct spi_device *)chip->vendor.iobase;
>>> + struct st33zp24_platform_data *platform_data = dev->dev.platform_data;
>>> + int status = 0;
>>> + u8 data;
>>> +
>>> + for (; status == 0x00 && latency < MAX_SPI_LATENCY; latency++) {
>>> + platform_data->latency = latency;
>>> + status = spi_read8_reg(chip, TPM_INTF_CAPABILITY, &data, 1);
>>> + }
>>> + return latency - 1;
>>> +} /* evaluate_latency() */
>>> +
>>> +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_spi_probe initialize the TPM device
>>> + * @param: client, the spi_device drescription (TPM SPI description).
>>> + * @param: id, the spi_device_id struct.
>>> + * @return: 0 in case of success.
>>> + * -1 in other case.
>>> + */
>>> +static int
>>> +tpm_st33_spi_probe(struct spi_device *dev) {
>>> + u32 err = 0;
>>> + u8 intmask;
>>> + struct tpm_chip *chip;
>>> + struct st33zp24_platform_data *platform_data;
>>> +
>>> + /* Check SPI platform functionnalities */
>>> + if (dev == NULL) {
>>> + pr_info("dev is NULL. exiting.\n");
>>> + err = -ENODEV;
>>> + goto end;
>>> + }
>>> +
>>> + chip = tpm_register_hardware(&dev->dev, &st_spi_tpm);
>>> + if (!chip) {
>>> + err = -ENODEV;
>>> + goto end;
>>> + }
>>> +
>>> + /* Allocation of SPI buffers MISO and MOSI */
>>> + /* Size is as follow: */
>>> + /* Request burstcount value = 0x800 = 2048 */
>>> + /* + */
>>> + /* Response burstcount value = 0x400 = 1024 */
>>> + /* + */
>>> + /* At least: */
>>> + /* 1 byte for direction/locality */
>>> + /* 1 byte tpm tis register */
>>> + /* 2 bytes spi data length (for request only) */
>>> + /* 2 latency bytes */
>>> + /* 1 status byte */
>>> + /* = 2048 + 1024 + 7 */
>>> + /* We reserved 2048 + 1024 + 20 in case latency byte */
>>> + /* change */
>>> + platform_data = dev->dev.platform_data;
>>> + platform_data->tpm_spi_buffer[0] =
>>> + kmalloc((TPM_BUFSIZE + (TPM_BUFSIZE / 2) +
>>> + TPM_DIGEST_SIZE) * sizeof(u8), GFP_KERNEL);
>>> + if (platform_data->tpm_spi_buffer[0] == NULL) {
>>> + err = -ENOMEM;
>>> + goto _tpm_clean_answer;
>>> + }
>>> + platform_data->tpm_spi_buffer[1] =
>>> + kmalloc((TPM_BUFSIZE + (TPM_BUFSIZE / 2) +
>>> + TPM_DIGEST_SIZE) * sizeof(u8) , GFP_KERNEL);
>>> + if (platform_data->tpm_spi_buffer[1] == NULL) {
>>> + err = -ENOMEM;
>>> + goto _tpm_clean_response;
>>> + }
>>> +
>>> + chip->vendor.iobase = dev;
>>> +
>>> + /* Default timeouts */
>>> + 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);
>>> + }
>>> +
>>> + platform_data->latency = evaluate_latency(chip);
>>> + if (platform_data->latency <= 0x00) {
>>> + err = -ENODEV;
>>> + goto _gpio_init1;
>>> + }
>>> +
>>> + /* Enable interrupt */
>>> + /* Register GPIO pin through generic Linux GPIO API */
>>> + 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 all existing */
>>> + clear_interruption(chip);
>>> + err = request_irq(gpio_to_irq(platform_data->io_serirq),
>>> + &tpm_ioserirq_handler,
>>> + IRQF_TRIGGER_HIGH | IRQF_SHARED,
>>> + "TPM SERIRQ management", chip);
>>> + if (err < 0) {
>>> + pr_info("TPM SERIRQ signals %d not available\n",
>>> + gpio_to_irq(platform_data->io_serirq));
>>> + goto _irq_set;
>>> + }
>>> + err = spi_read8_reg(chip, 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_LOC4SOFTRELEASE_INT
>>> + | TPM_INTF_LOCALITY_CHANGE_INT
>>> + | TPM_INTF_STS_VALID_INT
>>> + | TPM_INTF_DATA_AVAIL_INT;
>>> +
>>> + err = spi_write8_reg(chip, TPM_INT_ENABLE, &intmask, 1);
>>> + if (err < 0)
>>> + goto _irq_set;
>>> +
>>> + intmask = TPM_GLOBAL_INT_ENABLE;
>>> + err = spi_write8_reg(chip, TPM_INT_ENABLE + 3, &intmask, 1);
>>> + if (err < 0)
>>> + goto _irq_set;
>>> +
>>> + err = spi_read8_reg(chip, TPM_INT_STATUS, &intmask, 1);
>>> + if (err < 0)
>>> + goto _irq_set;
>>> +
>>> + chip->vendor.irq = interrupts;
>>> +
>>> + tpm_gen_interrupt(chip);
>>> + }
>>> +
>>> + tpm_get_timeouts(chip);
>>> +
>>> + /* attach chip datas to client */
>>> + spi_set_drvdata(dev, chip);
>>> + platform_data->bchipf = false;
>>> +
>>> + pr_info("TPM SPI Initialized\n");
>>> + return 0;
>>> +_irq_set:
>>> + free_irq(gpio_to_irq(platform_data->io_serirq), 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_spi_buffer[1] != NULL) {
>>> + kfree(platform_data->tpm_spi_buffer[1]);
>>> + platform_data->tpm_spi_buffer[1] = NULL;
>>> + }
>>> +_tpm_clean_answer:
>>> + if (platform_data->tpm_spi_buffer[0] != NULL) {
>>> + kfree(platform_data->tpm_spi_buffer[0]);
>>> + platform_data->tpm_spi_buffer[0] = NULL;
>>> + }
>>> +
>>> + platform_data->bchipf = true;
>>> +end:
>>> + pr_info("TPM SPI initialisation fail\n");
>>> + return err;
>>> +}
>>> +
>>> +/*
>>> + * tpm_st33_spi_remove remove the TPM device
>>> + * @param: client, the spi_device drescription (TPM SPI description).
>>> + clear_bit(0, &chip->is_open);
>>> + * @return: 0 in case of success.
>>> + */
>>> +static int tpm_st33_spi_remove(struct spi_device *client) {
>>> + struct tpm_chip *chip = (struct tpm_chip *)spi_get_drvdata(client);
>>> + struct st33zp24_platform_data *pin_infos =
>>> + ((struct spi_device
>>> +*)chip->vendor.iobase)->dev.platform_data;
>>> +
>>> + if (pin_infos != NULL) {
>>> + gpio_free(pin_infos->io_lpcpd);
>>> +
>>> + /* Check if chip has been previously clean */
>>> + if (pin_infos->bchipf != true)
>>> + tpm_remove_hardware(chip->dev);
>>> + if (pin_infos->tpm_spi_buffer[1] != NULL) {
>>> + kfree(pin_infos->tpm_spi_buffer[1]);
>>> + pin_infos->tpm_spi_buffer[1] = NULL;
>>> + }
>>> + if (pin_infos->tpm_spi_buffer[0] != NULL) {
>>> + kfree(pin_infos->tpm_spi_buffer[0]);
>>> + pin_infos->tpm_spi_buffer[0] = NULL;
>>> + }
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +#ifdef CONFIG_PM_SLEEP
>>> +/*
>>> + * tpm_st33_spi_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)
>>> + * @return: 0 in case of success.
>>> + */
>>> +static int tpm_st33_spi_pm_suspend(struct device *dev) {
>>> + struct tpm_chip *chip = dev_get_drvdata(dev);
>>> + struct st33zp24_platform_data *pin_infos = 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_spi_buffer[0];
>>> + ret = tpm_pm_suspend(dev);
>>> + }
>>> + return ret;
>>> +} /* tpm_st33_spi_suspend() */
>>> +
>>> +/*
>>> + * tpm_st33_spi_pm_resume resume the TPM device
>>> + * @param: spi, the spi_device drescription (TPM SPI description).
>>> + * @return: 0 in case of success.
>>> + */
>>> +static int tpm_st33_spi_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 (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_spi_buffer[0];
>>> + ret = tpm_pm_resume(dev);
>>> + if (!ret)
>>> + tpm_do_selftest(chip);
>>> + }
>>> + return ret;
>>> +} /* tpm_st33_spi_pm_resume() */
>>> +#endif
>>> +
>>> +static SIMPLE_DEV_PM_OPS(tpm_st33_spi_ops, tpm_st33_spi_pm_suspend,
>>> + tpm_st33_spi_pm_resume);
>>> +static struct spi_driver tpm_st33_spi_driver = {
>>> + .driver = {
>>> + .owner = THIS_MODULE,
>>> + .name = TPM_ST33_SPI,
>>> + .pm = &tpm_st33_spi_ops,
>>> + },
>>> + .probe = tpm_st33_spi_probe,
>>> + .remove = tpm_st33_spi_remove,
>>> +};
>>> +
>>> +module_spi_driver(tpm_st33_spi_driver);
>>> +
>>> +MODULE_AUTHOR("Christophe Ricard (tpmsupport@xxxxxx)");
>>> +MODULE_DESCRIPTION("STM TPM SPI ST33 Driver");
>>> +MODULE_VERSION("1.2.0"); MODULE_LICENSE("GPL");
>>> diff --git a/drivers/char/tpm/tpm_spi_stm_st33.h
>>> b/drivers/char/tpm/tpm_spi_stm_st33.h
>>> new file mode 100644
>>> index 0000000..4ae5ba6
>>> --- /dev/null
>>> +++ b/drivers/char/tpm/tpm_spi_stm_st33.h
>>> @@ -0,0 +1,61 @@
>>> +/*
>>> + * STMicroelectronics TPM SPI Linux driver for TPM ST33NP18
>>> + * 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@xxxxxx
>>> + *
>>> + * @File: tpm_spi_stm_st33.h
>>> + *
>>> + * @Date: 09/15/2010
>>> + */
>>> +#ifndef __STM_ST33_TPM_SPI_MAIN_H__
>>> +#define __STM_ST33_TPM_SPI_MAIN_H__
>>> +
>>> +#define TPM_ACCESS (0x0)
>>> +#define TPM_STS (0x18)
>>> +#define TPM_DATA_FIFO (0x24)
>>> +#define TPM_HASH_DATA (0x24)
>>> +#define TPM_INTF_CAPABILITY (0x14)
>>> +#define TPM_INT_STATUS (0x10)
>>> +#define TPM_INT_ENABLE (0x08)
>>> +
>>> +#define TPM_DUMMY_BYTE 0x00
>>> +#define TPM_WRITE_DIRECTION 0x80
>>> +#define TPM_HEADER_SIZE 10
>>> +#define TPM_BUFSIZE 2048
>>> +
>>> +#define LOCALITY0 0
>>> +
>>> +#define MAX_SPI_LATENCY 15
>>> +
>>> +#define TPM_ST33_SPI "st33zp24_spi"
>>> +
>>> +struct st33zp24_platform_data {
>>> + int io_serirq;
>>> + int io_lpcpd;
>>> + int latency;
>>> + bool bchipf;
>>> + u8 *tpm_spi_buffer[2]; /* 0 Request 1 Response */
>>> + struct completion irq_detection; };
>>> +
>>> +#endif /* __STM_ST33_TPM_SPI_MAIN_H__ */
>>> --
>>> 1.7.1
>>>
>>>
>>> ---------------------------------------------------------------------
>>> --------- Learn Graph Databases - Download FREE O'Reilly Book "Graph
>>> Databases" is the definitive new guide to graph databases and their
>>> applications. This 200-page book is written by three acclaimed
>>> leaders in the field. The early access version is available now.
>>> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>>> _______________________________________________
>>> tpmdd-devel mailing list
>>> tpmdd-devel@xxxxxxxxxxxxxxxxxxxxx
>>> https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/