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dm: tpm: Convert I2C driver to driver model
Convert the tpm_tis_i2c driver to use driver model and update boards which use it. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Christophe Ricard<christophe-h.ricard@st.com> Reviewed-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Simon Glass
parent
6e474eab44
commit
b697e0ff5b
8 changed files with 211 additions and 354 deletions
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@ -13,6 +13,7 @@ CONFIG_CMD_CROS_EC=y
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CONFIG_CROS_EC=y
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CONFIG_CROS_EC_SPI=y
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CONFIG_CROS_EC_KEYB=y
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CONFIG_DM_TPM=y
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CONFIG_TPM_TIS_I2C=y
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CONFIG_DM_I2C=y
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CONFIG_DM_I2C_COMPAT=y
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@ -13,6 +13,7 @@ CONFIG_CMD_CROS_EC=y
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CONFIG_CROS_EC=y
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CONFIG_CROS_EC_SPI=y
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CONFIG_CROS_EC_KEYB=y
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CONFIG_DM_TPM=y
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CONFIG_TPM_TIS_I2C=y
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CONFIG_DM_I2C=y
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CONFIG_DM_I2C_COMPAT=y
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@ -18,6 +18,7 @@ CONFIG_DEBUG_UART=y
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CONFIG_DEBUG_UART_S5P=y
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CONFIG_DEBUG_UART_BASE=0x12c30000
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CONFIG_DEBUG_UART_CLOCK=100000000
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CONFIG_DM_TPM=y
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CONFIG_TPM_TIS_I2C=y
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CONFIG_DM_I2C=y
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CONFIG_DM_I2C_COMPAT=y
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@ -18,6 +18,7 @@ CONFIG_DEBUG_UART=y
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CONFIG_DEBUG_UART_S5P=y
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CONFIG_DEBUG_UART_BASE=0x12c30000
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CONFIG_DEBUG_UART_CLOCK=100000000
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CONFIG_DM_TPM=y
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CONFIG_TPM_TIS_I2C=y
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CONFIG_DM_I2C=y
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CONFIG_DM_I2C_COMPAT=y
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@ -23,11 +23,11 @@
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#include <common.h>
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#include <dm.h>
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#include <fdtdec.h>
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#include <linux/compiler.h>
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#include <i2c.h>
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#include <tis.h>
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#include <tpm.h>
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#include <asm-generic/errno.h>
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <linux/unaligned/be_byteshift.h>
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@ -42,8 +42,6 @@ static const char * const chip_name[] = {
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[UNKNOWN] = "unknown/fallback to slb9635",
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};
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static struct tpm_chip g_chip;
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/*
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* tpm_tis_i2c_read() - read from TPM register
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* @addr: register address to read from
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@ -58,22 +56,24 @@ static struct tpm_chip g_chip;
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*
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* Return -EIO on error, 0 on success.
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*/
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static int tpm_tis_i2c_read(u8 addr, u8 *buffer, size_t len)
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static int tpm_tis_i2c_read(struct udevice *dev, u8 addr, u8 *buffer,
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size_t len)
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{
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struct tpm_chip *chip = dev_get_priv(dev);
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int rc;
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int count;
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uint32_t addrbuf = addr;
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if ((g_chip.chip_type == SLB9635) || (g_chip.chip_type == UNKNOWN)) {
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if ((chip->chip_type == SLB9635) || (chip->chip_type == UNKNOWN)) {
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/* slb9635 protocol should work in both cases */
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for (count = 0; count < MAX_COUNT; count++) {
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rc = dm_i2c_write(g_chip.dev, 0, (uchar *)&addrbuf, 1);
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rc = dm_i2c_write(dev, 0, (uchar *)&addrbuf, 1);
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if (rc == 0)
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break; /* Success, break to skip sleep */
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udelay(SLEEP_DURATION_US);
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}
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if (rc)
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return -rc;
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return rc;
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/* After the TPM has successfully received the register address
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* it needs some time, thus we're sleeping here again, before
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@ -81,7 +81,7 @@ static int tpm_tis_i2c_read(u8 addr, u8 *buffer, size_t len)
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*/
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for (count = 0; count < MAX_COUNT; count++) {
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udelay(SLEEP_DURATION_US);
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rc = dm_i2c_read(g_chip.dev, 0, buffer, len);
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rc = dm_i2c_read(dev, 0, buffer, len);
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if (rc == 0)
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break; /* success, break to skip sleep */
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}
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@ -94,7 +94,7 @@ static int tpm_tis_i2c_read(u8 addr, u8 *buffer, size_t len)
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* be safe on the safe side.
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*/
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for (count = 0; count < MAX_COUNT; count++) {
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rc = dm_i2c_read(g_chip.dev, addr, buffer, len);
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rc = dm_i2c_read(dev, addr, buffer, len);
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if (rc == 0)
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break; /* break here to skip sleep */
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udelay(SLEEP_DURATION_US);
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@ -104,19 +104,31 @@ static int tpm_tis_i2c_read(u8 addr, u8 *buffer, size_t len)
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/* Take care of 'guard time' */
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udelay(SLEEP_DURATION_US);
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if (rc)
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return -rc;
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return rc;
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return 0;
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}
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static int tpm_tis_i2c_write_generic(u8 addr, u8 *buffer, size_t len,
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static int tpm_tis_i2c_write_generic(struct udevice *dev, u8 addr,
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const u8 *buffer, size_t len,
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unsigned int sleep_time_us, u8 max_count)
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{
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struct tpm_chip_priv *priv = dev_get_uclass_priv(dev);
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struct tpm_chip *chip = dev_get_priv(dev);
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int rc = 0;
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int count;
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if (chip->chip_type == SLB9635) {
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/* Prepare send buffer to include the address */
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priv->buf[0] = addr;
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memcpy(&(priv->buf[1]), buffer, len);
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buffer = priv->buf;
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len++;
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addr = 0;
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}
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for (count = 0; count < max_count; count++) {
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rc = dm_i2c_write(g_chip.dev, addr, buffer, len);
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rc = dm_i2c_write(dev, addr, buffer, len);
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if (rc == 0)
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break; /* Success, break to skip sleep */
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udelay(sleep_time_us);
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@ -125,7 +137,7 @@ static int tpm_tis_i2c_write_generic(u8 addr, u8 *buffer, size_t len,
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/* take care of 'guard time' */
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udelay(sleep_time_us);
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if (rc)
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return -rc;
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return rc;
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return 0;
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}
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@ -146,30 +158,33 @@ static int tpm_tis_i2c_write_generic(u8 addr, u8 *buffer, size_t len,
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*
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* Return -EIO on error, 0 on success
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*/
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static int tpm_tis_i2c_write(u8 addr, u8 *buffer, size_t len)
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static int tpm_tis_i2c_write(struct udevice *dev, u8 addr, const u8 *buffer,
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size_t len)
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{
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return tpm_tis_i2c_write_generic(addr, buffer, len, SLEEP_DURATION_US,
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MAX_COUNT);
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return tpm_tis_i2c_write_generic(dev, addr, buffer, len,
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SLEEP_DURATION_US, MAX_COUNT);
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}
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/*
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* This function is needed especially for the cleanup situation after
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* sending TPM_READY
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*/
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static int tpm_tis_i2c_write_long(u8 addr, u8 *buffer, size_t len)
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static int tpm_tis_i2c_write_long(struct udevice *dev, u8 addr, u8 *buffer,
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size_t len)
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{
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return tpm_tis_i2c_write_generic(addr, buffer, len,
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return tpm_tis_i2c_write_generic(dev, addr, buffer, len,
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SLEEP_DURATION_LONG_US,
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MAX_COUNT_LONG);
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}
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static int tpm_tis_i2c_check_locality(struct tpm_chip *chip, int loc)
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static int tpm_tis_i2c_check_locality(struct udevice *dev, int loc)
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{
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const u8 mask = TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID;
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struct tpm_chip *chip = dev_get_priv(dev);
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u8 buf;
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int rc;
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rc = tpm_tis_i2c_read(TPM_ACCESS(loc), &buf, 1);
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rc = tpm_tis_i2c_read(dev, TPM_ACCESS(loc), &buf, 1);
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if (rc < 0)
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return rc;
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@ -178,75 +193,96 @@ static int tpm_tis_i2c_check_locality(struct tpm_chip *chip, int loc)
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return loc;
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}
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return -1;
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return -ENOENT;
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}
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static void tpm_tis_i2c_release_locality(struct tpm_chip *chip, int loc,
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static void tpm_tis_i2c_release_locality(struct udevice *dev, int loc,
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int force)
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{
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const u8 mask = TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID;
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u8 buf;
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if (tpm_tis_i2c_read(TPM_ACCESS(loc), &buf, 1) < 0)
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if (tpm_tis_i2c_read(dev, TPM_ACCESS(loc), &buf, 1) < 0)
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return;
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if (force || (buf & mask) == mask) {
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buf = TPM_ACCESS_ACTIVE_LOCALITY;
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tpm_tis_i2c_write(TPM_ACCESS(loc), &buf, 1);
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tpm_tis_i2c_write(dev, TPM_ACCESS(loc), &buf, 1);
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}
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}
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static int tpm_tis_i2c_request_locality(struct tpm_chip *chip, int loc)
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static int tpm_tis_i2c_request_locality(struct udevice *dev, int loc)
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{
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struct tpm_chip *chip = dev_get_priv(dev);
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unsigned long start, stop;
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u8 buf = TPM_ACCESS_REQUEST_USE;
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int rc;
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if (tpm_tis_i2c_check_locality(chip, loc) >= 0)
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rc = tpm_tis_i2c_check_locality(dev, loc);
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if (rc >= 0) {
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debug("%s: Already have locality\n", __func__);
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return loc; /* We already have the locality */
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rc = tpm_tis_i2c_write(TPM_ACCESS(loc), &buf, 1);
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if (rc)
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} else if (rc != -ENOENT) {
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debug("%s: Failed to get locality: %d\n", __func__, rc);
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return rc;
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}
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rc = tpm_tis_i2c_write(dev, TPM_ACCESS(loc), &buf, 1);
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if (rc) {
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debug("%s: Failed to write to TPM: %d\n", __func__, rc);
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return rc;
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}
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/* Wait for burstcount */
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start = get_timer(0);
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stop = chip->timeout_a;
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do {
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if (tpm_tis_i2c_check_locality(chip, loc) >= 0)
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rc = tpm_tis_i2c_check_locality(dev, loc);
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if (rc >= 0) {
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debug("%s: Have locality\n", __func__);
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return loc;
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} else if (rc != -ENOENT) {
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debug("%s: Failed to get locality: %d\n", __func__, rc);
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return rc;
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}
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mdelay(TPM_TIMEOUT_MS);
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} while (get_timer(start) < stop);
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debug("%s: Timeout getting locality: %d\n", __func__, rc);
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return -1;
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return rc;
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}
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static u8 tpm_tis_i2c_status(struct tpm_chip *chip)
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static u8 tpm_tis_i2c_status(struct udevice *dev)
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{
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struct tpm_chip *chip = dev_get_priv(dev);
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/* NOTE: Since i2c read may fail, return 0 in this case --> time-out */
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u8 buf;
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if (tpm_tis_i2c_read(TPM_STS(chip->locality), &buf, 1) < 0)
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if (tpm_tis_i2c_read(dev, TPM_STS(chip->locality), &buf, 1) < 0)
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return 0;
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else
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return buf;
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}
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static void tpm_tis_i2c_ready(struct tpm_chip *chip)
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static int tpm_tis_i2c_ready(struct udevice *dev)
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{
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struct tpm_chip *chip = dev_get_priv(dev);
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int rc;
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/* This causes the current command to be aborted */
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u8 buf = TPM_STS_COMMAND_READY;
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debug("%s\n", __func__);
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rc = tpm_tis_i2c_write_long(TPM_STS(chip->locality), &buf, 1);
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rc = tpm_tis_i2c_write_long(dev, TPM_STS(chip->locality), &buf, 1);
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if (rc)
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debug("%s: rc=%d\n", __func__, rc);
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return rc;
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}
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static ssize_t tpm_tis_i2c_get_burstcount(struct tpm_chip *chip)
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static ssize_t tpm_tis_i2c_get_burstcount(struct udevice *dev)
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{
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struct tpm_chip *chip = dev_get_priv(dev);
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unsigned long start, stop;
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ssize_t burstcnt;
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u8 addr, buf[3];
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@ -258,7 +294,7 @@ static ssize_t tpm_tis_i2c_get_burstcount(struct tpm_chip *chip)
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do {
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/* Note: STS is little endian */
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addr = TPM_STS(chip->locality) + 1;
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if (tpm_tis_i2c_read(addr, buf, 3) < 0)
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if (tpm_tis_i2c_read(dev, addr, buf, 3) < 0)
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burstcnt = 0;
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else
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burstcnt = (buf[2] << 16) + (buf[1] << 8) + buf[0];
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@ -271,13 +307,13 @@ static ssize_t tpm_tis_i2c_get_burstcount(struct tpm_chip *chip)
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return -EBUSY;
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}
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static int tpm_tis_i2c_wait_for_stat(struct tpm_chip *chip, u8 mask,
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static int tpm_tis_i2c_wait_for_stat(struct udevice *dev, u8 mask,
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unsigned long timeout, int *status)
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{
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unsigned long start, stop;
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/* Check current status */
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*status = tpm_tis_i2c_status(chip);
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*status = tpm_tis_i2c_status(dev);
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if ((*status & mask) == mask)
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return 0;
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@ -285,22 +321,23 @@ static int tpm_tis_i2c_wait_for_stat(struct tpm_chip *chip, u8 mask,
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stop = timeout;
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do {
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mdelay(TPM_TIMEOUT_MS);
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*status = tpm_tis_i2c_status(chip);
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*status = tpm_tis_i2c_status(dev);
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if ((*status & mask) == mask)
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return 0;
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} while (get_timer(start) < stop);
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return -ETIME;
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return -ETIMEDOUT;
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}
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static int tpm_tis_i2c_recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
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static int tpm_tis_i2c_recv_data(struct udevice *dev, u8 *buf, size_t count)
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{
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struct tpm_chip *chip = dev_get_priv(dev);
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size_t size = 0;
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ssize_t burstcnt;
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int rc;
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while (size < count) {
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burstcnt = tpm_tis_i2c_get_burstcount(chip);
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burstcnt = tpm_tis_i2c_get_burstcount(dev);
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/* burstcount < 0 -> tpm is busy */
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if (burstcnt < 0)
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@ -310,8 +347,8 @@ static int tpm_tis_i2c_recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
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if (burstcnt > (count - size))
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burstcnt = count - size;
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rc = tpm_tis_i2c_read(TPM_DATA_FIFO(chip->locality),
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&(buf[size]), burstcnt);
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rc = tpm_tis_i2c_read(dev, TPM_DATA_FIFO(chip->locality),
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&(buf[size]), burstcnt);
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if (rc == 0)
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size += burstcnt;
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}
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@ -319,61 +356,58 @@ static int tpm_tis_i2c_recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
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return size;
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}
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static int tpm_tis_i2c_recv(struct tpm_chip *chip, u8 *buf, size_t count)
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static int tpm_tis_i2c_recv(struct udevice *dev, u8 *buf, size_t count)
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{
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struct tpm_chip *chip = dev_get_priv(dev);
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int size = 0;
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int expected, status;
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int rc;
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if (count < TPM_HEADER_SIZE) {
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size = -EIO;
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goto out;
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}
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status = tpm_tis_i2c_status(dev);
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if (status == TPM_STS_COMMAND_READY)
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return -EINTR;
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if ((status & (TPM_STS_DATA_AVAIL | TPM_STS_VALID)) !=
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(TPM_STS_DATA_AVAIL | TPM_STS_VALID))
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return -EAGAIN;
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debug("...got it;\n");
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/* Read first 10 bytes, including tag, paramsize, and result */
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size = tpm_tis_i2c_recv_data(chip, buf, TPM_HEADER_SIZE);
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size = tpm_tis_i2c_recv_data(dev, buf, TPM_HEADER_SIZE);
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if (size < TPM_HEADER_SIZE) {
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error("Unable to read header\n");
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goto out;
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debug("Unable to read header\n");
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return size < 0 ? size : -EIO;
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}
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expected = get_unaligned_be32(buf + TPM_RSP_SIZE_BYTE);
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||||
if ((size_t)expected > count) {
|
||||
error("Error size=%x, expected=%x, count=%x\n", size, expected,
|
||||
debug("Error size=%x, expected=%x, count=%x\n", size, expected,
|
||||
count);
|
||||
size = -EIO;
|
||||
goto out;
|
||||
return -ENOSPC;
|
||||
}
|
||||
|
||||
size += tpm_tis_i2c_recv_data(chip, &buf[TPM_HEADER_SIZE],
|
||||
size += tpm_tis_i2c_recv_data(dev, &buf[TPM_HEADER_SIZE],
|
||||
expected - TPM_HEADER_SIZE);
|
||||
if (size < expected) {
|
||||
error("Unable to read remainder of result\n");
|
||||
size = -ETIME;
|
||||
goto out;
|
||||
debug("Unable to read remainder of result\n");
|
||||
return -ETIMEDOUT;
|
||||
}
|
||||
|
||||
tpm_tis_i2c_wait_for_stat(chip, TPM_STS_VALID, chip->timeout_c,
|
||||
&status);
|
||||
rc = tpm_tis_i2c_wait_for_stat(dev, TPM_STS_VALID, chip->timeout_c,
|
||||
&status);
|
||||
if (rc)
|
||||
return rc;
|
||||
if (status & TPM_STS_DATA_AVAIL) { /* Retry? */
|
||||
error("Error left over data\n");
|
||||
size = -EIO;
|
||||
goto out;
|
||||
debug("Error left over data\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
out:
|
||||
tpm_tis_i2c_ready(chip);
|
||||
/*
|
||||
* The TPM needs some time to clean up here,
|
||||
* so we sleep rather than keeping the bus busy
|
||||
*/
|
||||
mdelay(2);
|
||||
tpm_tis_i2c_release_locality(chip, chip->locality, 0);
|
||||
|
||||
return size;
|
||||
}
|
||||
|
||||
static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len)
|
||||
static int tpm_tis_i2c_send(struct udevice *dev, const u8 *buf, size_t len)
|
||||
{
|
||||
struct tpm_chip *chip = dev_get_priv(dev);
|
||||
int rc, status;
|
||||
size_t burstcnt;
|
||||
size_t count = 0;
|
||||
|
|
@ -384,20 +418,21 @@ static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len)
|
|||
if (len > TPM_DEV_BUFSIZE)
|
||||
return -E2BIG; /* Command is too long for our tpm, sorry */
|
||||
|
||||
if (tpm_tis_i2c_request_locality(chip, 0) < 0)
|
||||
if (tpm_tis_i2c_request_locality(dev, 0) < 0)
|
||||
return -EBUSY;
|
||||
|
||||
status = tpm_tis_i2c_status(chip);
|
||||
status = tpm_tis_i2c_status(dev);
|
||||
if ((status & TPM_STS_COMMAND_READY) == 0) {
|
||||
tpm_tis_i2c_ready(chip);
|
||||
if (tpm_tis_i2c_wait_for_stat(chip, TPM_STS_COMMAND_READY,
|
||||
chip->timeout_b, &status) < 0) {
|
||||
rc = -ETIME;
|
||||
goto out_err;
|
||||
}
|
||||
rc = tpm_tis_i2c_ready(dev);
|
||||
if (rc)
|
||||
return rc;
|
||||
rc = tpm_tis_i2c_wait_for_stat(dev, TPM_STS_COMMAND_READY,
|
||||
chip->timeout_b, &status);
|
||||
if (rc)
|
||||
return rc;
|
||||
}
|
||||
|
||||
burstcnt = tpm_tis_i2c_get_burstcount(chip);
|
||||
burstcnt = tpm_tis_i2c_get_burstcount(dev);
|
||||
|
||||
/* burstcount < 0 -> tpm is busy */
|
||||
if (burstcnt < 0)
|
||||
|
|
@ -409,98 +444,79 @@ static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len)
|
|||
burstcnt = len - count;
|
||||
|
||||
#ifdef CONFIG_TPM_TIS_I2C_BURST_LIMITATION
|
||||
if (retry && burstcnt > CONFIG_TPM_TIS_I2C_BURST_LIMITATION)
|
||||
burstcnt = CONFIG_TPM_TIS_I2C_BURST_LIMITATION;
|
||||
if (retry && burstcnt > CONFIG_TPM_TIS_I2C_BURST_LIMITATION_LEN)
|
||||
burstcnt = CONFIG_TPM_TIS_I2C_BURST_LIMITATION_LEN;
|
||||
#endif /* CONFIG_TPM_TIS_I2C_BURST_LIMITATION */
|
||||
|
||||
rc = tpm_tis_i2c_write(TPM_DATA_FIFO(chip->locality),
|
||||
&(buf[count]), burstcnt);
|
||||
rc = tpm_tis_i2c_write(dev, TPM_DATA_FIFO(chip->locality),
|
||||
&(buf[count]), burstcnt);
|
||||
if (rc == 0)
|
||||
count += burstcnt;
|
||||
else {
|
||||
debug("%s: error\n", __func__);
|
||||
if (retry++ > 10) {
|
||||
rc = -EIO;
|
||||
goto out_err;
|
||||
}
|
||||
rc = tpm_tis_i2c_wait_for_stat(chip, TPM_STS_VALID,
|
||||
if (retry++ > 10)
|
||||
return -EIO;
|
||||
rc = tpm_tis_i2c_wait_for_stat(dev, TPM_STS_VALID,
|
||||
chip->timeout_c,
|
||||
&status);
|
||||
if (rc)
|
||||
goto out_err;
|
||||
return rc;
|
||||
|
||||
if ((status & TPM_STS_DATA_EXPECT) == 0) {
|
||||
rc = -EIO;
|
||||
goto out_err;
|
||||
}
|
||||
if ((status & TPM_STS_DATA_EXPECT) == 0)
|
||||
return -EIO;
|
||||
}
|
||||
}
|
||||
|
||||
/* Go and do it */
|
||||
tpm_tis_i2c_write(TPM_STS(chip->locality), &sts, 1);
|
||||
debug("done\n");
|
||||
rc = tpm_tis_i2c_write(dev, TPM_STS(chip->locality), &sts, 1);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
debug("%s: done, rc=%d\n", __func__, rc);
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
out_err:
|
||||
debug("%s: out_err\n", __func__);
|
||||
tpm_tis_i2c_ready(chip);
|
||||
static int tpm_tis_i2c_cleanup(struct udevice *dev)
|
||||
{
|
||||
struct tpm_chip *chip = dev_get_priv(dev);
|
||||
|
||||
tpm_tis_i2c_ready(dev);
|
||||
/*
|
||||
* The TPM needs some time to clean up here,
|
||||
* so we sleep rather than keeping the bus busy
|
||||
*/
|
||||
mdelay(2);
|
||||
tpm_tis_i2c_release_locality(chip, chip->locality, 0);
|
||||
tpm_tis_i2c_release_locality(dev, chip->locality, 0);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static enum i2c_chip_type tpm_tis_i2c_chip_type(void)
|
||||
{
|
||||
#if CONFIG_IS_ENABLED(OF_CONTROL)
|
||||
const void *blob = gd->fdt_blob;
|
||||
|
||||
if (fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9645_TPM) >= 0)
|
||||
return SLB9645;
|
||||
|
||||
if (fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9635_TPM) >= 0)
|
||||
return SLB9635;
|
||||
#endif
|
||||
return UNKNOWN;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tpm_tis_i2c_init(struct udevice *dev)
|
||||
{
|
||||
struct tpm_chip *chip = &g_chip;
|
||||
struct tpm_chip *chip = dev_get_priv(dev);
|
||||
u32 vendor;
|
||||
u32 expected_did_vid;
|
||||
int rc;
|
||||
|
||||
g_chip.dev = dev;
|
||||
g_chip.chip_type = tpm_tis_i2c_chip_type();
|
||||
chip->is_open = 1;
|
||||
|
||||
/* Disable interrupts (not supported) */
|
||||
chip->irq = 0;
|
||||
|
||||
/* Default timeouts - these could move to the device tree */
|
||||
chip->timeout_a = TIS_SHORT_TIMEOUT_MS;
|
||||
chip->timeout_b = TIS_LONG_TIMEOUT_MS;
|
||||
chip->timeout_c = TIS_SHORT_TIMEOUT_MS;
|
||||
chip->timeout_d = TIS_SHORT_TIMEOUT_MS;
|
||||
chip->req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID;
|
||||
chip->req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID;
|
||||
chip->req_canceled = TPM_STS_COMMAND_READY;
|
||||
|
||||
if (tpm_tis_i2c_request_locality(chip, 0) < 0)
|
||||
return -ENODEV;
|
||||
rc = tpm_tis_i2c_request_locality(dev, 0);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
|
||||
/* Read four bytes from DID_VID register */
|
||||
if (tpm_tis_i2c_read(TPM_DID_VID(0), (uchar *)&vendor, 4) < 0) {
|
||||
tpm_tis_i2c_release_locality(chip, 0, 1);
|
||||
if (tpm_tis_i2c_read(dev, TPM_DID_VID(0), (uchar *)&vendor, 4) < 0) {
|
||||
tpm_tis_i2c_release_locality(dev, 0, 1);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
if (g_chip.chip_type == SLB9635) {
|
||||
if (chip->chip_type == SLB9635) {
|
||||
vendor = be32_to_cpu(vendor);
|
||||
expected_did_vid = TPM_TIS_I2C_DID_VID_9635;
|
||||
} else {
|
||||
|
|
@ -508,13 +524,14 @@ static int tpm_tis_i2c_init(struct udevice *dev)
|
|||
expected_did_vid = TPM_TIS_I2C_DID_VID_9645;
|
||||
}
|
||||
|
||||
if (g_chip.chip_type != UNKNOWN && vendor != expected_did_vid) {
|
||||
if (chip->chip_type != UNKNOWN && vendor != expected_did_vid) {
|
||||
error("Vendor id did not match! ID was %08x\n", vendor);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
chip->vend_dev = vendor;
|
||||
debug("1.2 TPM (chip type %s device-id 0x%X)\n",
|
||||
chip_name[g_chip.chip_type], vendor >> 16);
|
||||
chip_name[chip->chip_type], vendor >> 16);
|
||||
|
||||
/*
|
||||
* A timeout query to TPM can be placed here.
|
||||
|
|
@ -524,225 +541,83 @@ static int tpm_tis_i2c_init(struct udevice *dev)
|
|||
return 0;
|
||||
}
|
||||
|
||||
/* Returns max number of milliseconds to wait */
|
||||
static unsigned long tpm_tis_i2c_calc_ordinal_duration(struct tpm_chip *chip,
|
||||
u32 ordinal)
|
||||
{
|
||||
int duration_idx = TPM_UNDEFINED;
|
||||
int duration = 0;
|
||||
|
||||
if (ordinal < TPM_MAX_ORDINAL) {
|
||||
duration_idx = tpm_ordinal_duration[ordinal];
|
||||
} else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) <
|
||||
TPM_MAX_PROTECTED_ORDINAL) {
|
||||
duration_idx = tpm_protected_ordinal_duration[
|
||||
ordinal & TPM_PROTECTED_ORDINAL_MASK];
|
||||
}
|
||||
|
||||
if (duration_idx != TPM_UNDEFINED)
|
||||
duration = chip->duration[duration_idx];
|
||||
|
||||
if (duration <= 0)
|
||||
return 2 * 60 * HZ; /* Two minutes timeout */
|
||||
else
|
||||
return duration;
|
||||
}
|
||||
|
||||
static ssize_t tpm_tis_i2c_transmit(const unsigned char *buf, size_t bufsiz)
|
||||
static int tpm_tis_i2c_open(struct udevice *dev)
|
||||
{
|
||||
struct tpm_chip *chip = dev_get_priv(dev);
|
||||
int rc;
|
||||
u32 count, ordinal;
|
||||
unsigned long start, stop;
|
||||
|
||||
struct tpm_chip *chip = &g_chip;
|
||||
|
||||
/* switch endianess: big->little */
|
||||
count = get_unaligned_be32(buf + TPM_CMD_COUNT_BYTE);
|
||||
ordinal = get_unaligned_be32(buf + TPM_CMD_ORDINAL_BYTE);
|
||||
|
||||
if (count == 0) {
|
||||
error("no data\n");
|
||||
return -ENODATA;
|
||||
}
|
||||
if (count > bufsiz) {
|
||||
error("invalid count value %x %zx\n", count, bufsiz);
|
||||
return -E2BIG;
|
||||
}
|
||||
|
||||
debug("Calling send\n");
|
||||
rc = tpm_tis_i2c_send(chip, (u8 *)buf, count);
|
||||
debug(" ... done calling send\n");
|
||||
if (rc < 0) {
|
||||
error("tpm_transmit: tpm_send: error %d\n", rc);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (chip->irq)
|
||||
goto out_recv;
|
||||
|
||||
start = get_timer(0);
|
||||
stop = tpm_tis_i2c_calc_ordinal_duration(chip, ordinal);
|
||||
do {
|
||||
debug("waiting for status... %ld %ld\n", start, stop);
|
||||
u8 status = tpm_tis_i2c_status(chip);
|
||||
if ((status & chip->req_complete_mask) ==
|
||||
chip->req_complete_val) {
|
||||
debug("...got it;\n");
|
||||
goto out_recv;
|
||||
}
|
||||
|
||||
if (status == chip->req_canceled) {
|
||||
error("Operation Canceled\n");
|
||||
rc = -ECANCELED;
|
||||
goto out;
|
||||
}
|
||||
mdelay(TPM_TIMEOUT_MS);
|
||||
} while (get_timer(start) < stop);
|
||||
|
||||
tpm_tis_i2c_ready(chip);
|
||||
error("Operation Timed out\n");
|
||||
rc = -ETIME;
|
||||
goto out;
|
||||
|
||||
out_recv:
|
||||
debug("out_recv: reading response...\n");
|
||||
rc = tpm_tis_i2c_recv(chip, (u8 *)buf, TPM_BUFSIZE);
|
||||
if (rc < 0)
|
||||
error("tpm_transmit: tpm_recv: error %d\n", rc);
|
||||
|
||||
out:
|
||||
return rc;
|
||||
}
|
||||
|
||||
/**
|
||||
* Decode TPM configuration.
|
||||
*
|
||||
* @param dev Returns a configuration of TPM device
|
||||
* @return 0 if ok, -1 on error
|
||||
*/
|
||||
static int tpm_tis_i2c_decode_config(struct tpm_chip *chip)
|
||||
{
|
||||
const void *blob = gd->fdt_blob;
|
||||
struct udevice *bus;
|
||||
int chip_addr;
|
||||
int parent;
|
||||
int node;
|
||||
int ret;
|
||||
|
||||
node = fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9635_TPM);
|
||||
if (node < 0) {
|
||||
node = fdtdec_next_compatible(blob, 0,
|
||||
COMPAT_INFINEON_SLB9645_TPM);
|
||||
}
|
||||
if (node < 0) {
|
||||
debug("%s: Node not found\n", __func__);
|
||||
return -1;
|
||||
}
|
||||
parent = fdt_parent_offset(blob, node);
|
||||
if (parent < 0) {
|
||||
debug("%s: Cannot find node parent\n", __func__);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* TODO(sjg@chromium.org): Remove this when driver model supports
|
||||
* TPMs
|
||||
*/
|
||||
ret = uclass_get_device_by_of_offset(UCLASS_I2C, parent, &bus);
|
||||
if (ret) {
|
||||
debug("Cannot find bus for node '%s: ret=%d'\n",
|
||||
fdt_get_name(blob, parent, NULL), ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
chip_addr = fdtdec_get_int(blob, node, "reg", -1);
|
||||
if (chip_addr == -1) {
|
||||
debug("Cannot find reg property for node '%s: ret=%d'\n",
|
||||
fdt_get_name(blob, node, NULL), ret);
|
||||
return ret;
|
||||
}
|
||||
/*
|
||||
* TODO(sjg@chromium.org): Older TPMs will need to use the older method
|
||||
* in tpm_tis_i2c_read() so the offset length needs to be 0 here.
|
||||
*/
|
||||
ret = i2c_get_chip(bus, chip_addr, 1, &chip->dev);
|
||||
if (ret) {
|
||||
debug("Cannot find device for node '%s: ret=%d'\n",
|
||||
fdt_get_name(blob, node, NULL), ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int tis_init(void)
|
||||
{
|
||||
if (g_chip.inited)
|
||||
return 0;
|
||||
|
||||
if (tpm_tis_i2c_decode_config(&g_chip))
|
||||
return -1;
|
||||
|
||||
debug("%s: done\n", __func__);
|
||||
|
||||
g_chip.inited = 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int tis_open(void)
|
||||
{
|
||||
int rc;
|
||||
|
||||
if (!g_chip.inited)
|
||||
return -1;
|
||||
|
||||
debug("%s: start\n", __func__);
|
||||
if (g_chip.is_open)
|
||||
if (chip->is_open)
|
||||
return -EBUSY;
|
||||
rc = tpm_tis_i2c_init(g_chip.dev);
|
||||
rc = tpm_tis_i2c_init(dev);
|
||||
if (rc < 0)
|
||||
g_chip.is_open = 0;
|
||||
chip->is_open = 0;
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
int tis_close(void)
|
||||
static int tpm_tis_i2c_close(struct udevice *dev)
|
||||
{
|
||||
if (!g_chip.inited)
|
||||
return -1;
|
||||
struct tpm_chip *chip = dev_get_priv(dev);
|
||||
|
||||
if (g_chip.is_open) {
|
||||
tpm_tis_i2c_release_locality(&g_chip, g_chip.locality, 1);
|
||||
g_chip.is_open = 0;
|
||||
if (chip->is_open) {
|
||||
tpm_tis_i2c_release_locality(dev, chip->locality, 1);
|
||||
chip->is_open = 0;
|
||||
chip->vend_dev = 0;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
|
||||
uint8_t *recvbuf, size_t *rbuf_len)
|
||||
static int tpm_tis_get_desc(struct udevice *dev, char *buf, int size)
|
||||
{
|
||||
int len;
|
||||
uint8_t buf[4096];
|
||||
struct tpm_chip *chip = dev_get_priv(dev);
|
||||
|
||||
if (!g_chip.inited)
|
||||
return -1;
|
||||
if (size < 50)
|
||||
return -ENOSPC;
|
||||
|
||||
if (sizeof(buf) < sbuf_size)
|
||||
return -1;
|
||||
return snprintf(buf, size, "1.2 TPM (%s, chip type %s device-id 0x%x)",
|
||||
chip->is_open ? "open" : "closed",
|
||||
chip_name[chip->chip_type],
|
||||
chip->vend_dev >> 16);
|
||||
}
|
||||
|
||||
memcpy(buf, sendbuf, sbuf_size);
|
||||
static int tpm_tis_i2c_probe(struct udevice *dev)
|
||||
{
|
||||
struct tpm_chip_priv *uc_priv = dev_get_uclass_priv(dev);
|
||||
struct tpm_chip *chip = dev_get_priv(dev);
|
||||
|
||||
len = tpm_tis_i2c_transmit(buf, sbuf_size);
|
||||
chip->chip_type = dev_get_driver_data(dev);
|
||||
|
||||
if (len < 10) {
|
||||
*rbuf_len = 0;
|
||||
return -1;
|
||||
}
|
||||
|
||||
memcpy(recvbuf, buf, len);
|
||||
*rbuf_len = len;
|
||||
/* TODO: These need to be checked and tuned */
|
||||
uc_priv->duration_ms[TPM_SHORT] = TIS_SHORT_TIMEOUT_MS;
|
||||
uc_priv->duration_ms[TPM_MEDIUM] = TIS_LONG_TIMEOUT_MS;
|
||||
uc_priv->duration_ms[TPM_LONG] = TIS_LONG_TIMEOUT_MS;
|
||||
uc_priv->retry_time_ms = TPM_TIMEOUT_MS;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct tpm_ops tpm_tis_i2c_ops = {
|
||||
.open = tpm_tis_i2c_open,
|
||||
.close = tpm_tis_i2c_close,
|
||||
.get_desc = tpm_tis_get_desc,
|
||||
.send = tpm_tis_i2c_send,
|
||||
.recv = tpm_tis_i2c_recv,
|
||||
.cleanup = tpm_tis_i2c_cleanup,
|
||||
};
|
||||
|
||||
static const struct udevice_id tpm_tis_i2c_ids[] = {
|
||||
{ .compatible = "infineon,slb9635tt", .data = SLB9635 },
|
||||
{ .compatible = "infineon,slb9645tt", .data = SLB9645 },
|
||||
{ }
|
||||
};
|
||||
|
||||
U_BOOT_DRIVER(tpm_tis_i2c) = {
|
||||
.name = "tpm_tis_i2c",
|
||||
.id = UCLASS_TPM,
|
||||
.of_match = tpm_tis_i2c_ids,
|
||||
.ops = &tpm_tis_i2c_ops,
|
||||
.probe = tpm_tis_i2c_probe,
|
||||
.priv_auto_alloc_size = sizeof(struct tpm_chip),
|
||||
};
|
||||
|
|
|
|||
|
|
@ -37,9 +37,6 @@ enum tpm_timeout {
|
|||
#define TPM_RSP_SIZE_BYTE 2
|
||||
#define TPM_RSP_RC_BYTE 6
|
||||
|
||||
/* Max buffer size supported by our tpm */
|
||||
#define TPM_DEV_BUFSIZE 1260
|
||||
|
||||
enum i2c_chip_type {
|
||||
SLB9635,
|
||||
SLB9645,
|
||||
|
|
@ -47,17 +44,10 @@ enum i2c_chip_type {
|
|||
};
|
||||
|
||||
struct tpm_chip {
|
||||
bool inited;
|
||||
int is_open;
|
||||
u8 req_complete_mask;
|
||||
u8 req_complete_val;
|
||||
u8 req_canceled;
|
||||
int irq;
|
||||
int locality;
|
||||
u32 vend_dev;
|
||||
unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* msec */
|
||||
unsigned long duration[3]; /* msec */
|
||||
struct udevice *dev;
|
||||
u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */
|
||||
enum i2c_chip_type chip_type;
|
||||
};
|
||||
|
||||
|
|
@ -129,8 +119,6 @@ struct tpm_cmd_t {
|
|||
*/
|
||||
#define MAX_COUNT_LONG 50
|
||||
|
||||
#define TPM_HEADER_SIZE 10
|
||||
|
||||
enum tis_access {
|
||||
TPM_ACCESS_VALID = 0x80,
|
||||
TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
|
||||
|
|
@ -155,10 +143,4 @@ enum tis_status {
|
|||
#define TPM_DATA_FIFO(l) (0x0005 | ((l) << 4))
|
||||
#define TPM_DID_VID(l) (0x0006 | ((l) << 4))
|
||||
|
||||
/* Extended error numbers from linux (see errno.h) */
|
||||
#define ECANCELED 125 /* Operation Canceled */
|
||||
|
||||
/* Timer frequency. Corresponds to msec timer resolution */
|
||||
#define HZ 1000
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -154,8 +154,6 @@ enum fdt_compat_id {
|
|||
COMPAT_MAXIM_MAX77686_PMIC, /* MAX77686 PMIC */
|
||||
COMPAT_GENERIC_SPI_FLASH, /* Generic SPI Flash chip */
|
||||
COMPAT_MAXIM_98095_CODEC, /* MAX98095 Codec */
|
||||
COMPAT_INFINEON_SLB9635_TPM, /* Infineon SLB9635 TPM */
|
||||
COMPAT_INFINEON_SLB9645_TPM, /* Infineon SLB9645 TPM */
|
||||
COMPAT_SAMSUNG_EXYNOS5_I2C, /* Exynos5 High Speed I2C Controller */
|
||||
COMPAT_SANDBOX_LCD_SDL, /* Sandbox LCD emulation with SDL */
|
||||
COMPAT_SAMSUNG_EXYNOS_SYSMMU, /* Exynos sysmmu */
|
||||
|
|
|
|||
|
|
@ -58,8 +58,6 @@ static const char * const compat_names[COMPAT_COUNT] = {
|
|||
COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
|
||||
COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
|
||||
COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
|
||||
COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
|
||||
COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645tt"),
|
||||
COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
|
||||
COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
|
||||
COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue