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@ -37,6 +37,7 @@ |
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*/ |
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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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@ -122,13 +123,19 @@ static const char * const chip_name[] = { |
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/* Structure to store I2C TPM specific stuff */ |
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struct tpm_dev { |
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#ifdef CONFIG_DM_I2C |
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struct udevice *dev; |
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#else |
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uint addr; |
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#endif |
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u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */ |
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enum i2c_chip_type chip_type; |
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}; |
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static struct tpm_dev tpm_dev = { |
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#ifndef CONFIG_DM_I2C |
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.addr = TPM_I2C_ADDR |
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#endif |
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}; |
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static struct tpm_dev tpm_dev; |
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@ -156,8 +163,12 @@ static int iic_tpm_read(u8 addr, u8 *buffer, size_t len) |
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if ((tpm_dev.chip_type == SLB9635) || (tpm_dev.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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#ifdef CONFIG_DM_I2C |
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rc = dm_i2c_write(tpm_dev.dev, 0, (uchar *)&addrbuf, 1); |
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#else |
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rc = i2c_write(tpm_dev.addr, 0, 0, |
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(uchar *)&addrbuf, 1); |
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#endif |
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if (rc == 0) |
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break; /* Success, break to skip sleep */ |
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udelay(SLEEP_DURATION); |
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@ -171,7 +182,11 @@ static int iic_tpm_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); |
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#ifdef CONFIG_DM_I2C |
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rc = dm_i2c_read(tpm_dev.dev, 0, buffer, len); |
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#else |
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rc = i2c_read(tpm_dev.addr, 0, 0, buffer, len); |
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#endif |
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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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@ -184,7 +199,11 @@ static int iic_tpm_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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#ifdef CONFIG_DM_I2C |
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rc = dm_i2c_read(tpm_dev.dev, addr, buffer, len); |
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#else |
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rc = i2c_read(tpm_dev.addr, addr, 1, buffer, len); |
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#endif |
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if (rc == 0) |
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break; /* break here to skip sleep */ |
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udelay(SLEEP_DURATION); |
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@ -206,18 +225,26 @@ static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len, |
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int count; |
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/* Prepare send buffer */ |
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#ifndef CONFIG_DM_I2C |
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tpm_dev.buf[0] = addr; |
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memcpy(&(tpm_dev.buf[1]), buffer, len); |
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buffer = tpm_dev.buf; |
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len++; |
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#endif |
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for (count = 0; count < max_count; count++) { |
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rc = i2c_write(tpm_dev.addr, 0, 0, tpm_dev.buf, len + 1); |
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#ifdef CONFIG_DM_I2C |
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rc = dm_i2c_write(tpm_dev.dev, addr, buffer, len); |
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#else |
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rc = i2c_write(tpm_dev.addr, 0, 0, buffer, len); |
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#endif |
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if (rc == 0) |
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break; /* Success, break to skip sleep */ |
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udelay(sleep_time); |
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} |
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/* take care of 'guard time' */ |
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udelay(SLEEP_DURATION); |
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udelay(sleep_time); |
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if (rc) |
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return -rc; |
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@ -292,11 +319,14 @@ static int request_locality(struct tpm_chip *chip, int loc) |
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{ |
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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 (check_locality(chip, loc) >= 0) |
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return loc; /* We already have the locality */ |
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iic_tpm_write(TPM_ACCESS(loc), &buf, 1); |
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rc = iic_tpm_write(TPM_ACCESS(loc), &buf, 1); |
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if (rc) |
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return rc; |
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/* Wait for burstcount */ |
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start = get_timer(0); |
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@ -323,10 +353,15 @@ static u8 tpm_tis_i2c_status(struct tpm_chip *chip) |
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static void tpm_tis_i2c_ready(struct tpm_chip *chip) |
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{ |
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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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iic_tpm_write_long(TPM_STS(chip->vendor.locality), &buf, 1); |
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debug("%s\n", __func__); |
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rc = iic_tpm_write_long(TPM_STS(chip->vendor.locality), &buf, 1); |
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if (rc) |
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debug("%s: rc=%d\n", __func__, rc); |
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} |
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static ssize_t get_burstcount(struct tpm_chip *chip) |
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@ -422,6 +457,8 @@ static int tpm_tis_i2c_recv(struct tpm_chip *chip, u8 *buf, size_t count) |
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expected = get_unaligned_be32(buf + TPM_RSP_SIZE_BYTE); |
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if ((size_t)expected > count) { |
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error("Error size=%x, expected=%x, count=%x\n", size, expected, |
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count); |
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size = -EIO; |
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goto out; |
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} |
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@ -456,11 +493,12 @@ out: |
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static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len) |
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{ |
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int rc, status; |
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ssize_t burstcnt; |
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size_t burstcnt; |
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size_t count = 0; |
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int retry = 0; |
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u8 sts = TPM_STS_GO; |
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debug("%s: len=%d\n", __func__, len); |
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if (len > TPM_DEV_BUFSIZE) |
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return -E2BIG; /* Command is too long for our tpm, sorry */ |
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@ -483,9 +521,10 @@ static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len) |
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if (burstcnt < 0) |
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return burstcnt; |
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while (count < len - 1) { |
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if (burstcnt > len - 1 - count) |
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burstcnt = len - 1 - count; |
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while (count < len) { |
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udelay(300); |
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if (burstcnt > len - count) |
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burstcnt = len - count; |
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#ifdef CONFIG_TPM_TIS_I2C_BURST_LIMITATION |
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if (retry && burstcnt > CONFIG_TPM_TIS_I2C_BURST_LIMITATION) |
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@ -497,9 +536,15 @@ static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len) |
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if (rc == 0) |
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count += burstcnt; |
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else { |
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retry++; |
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wait_for_stat(chip, TPM_STS_VALID, |
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chip->vendor.timeout_c, &status); |
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debug("%s: error\n", __func__); |
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if (retry++ > 10) { |
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rc = -EIO; |
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goto out_err; |
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} |
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rc = wait_for_stat(chip, TPM_STS_VALID, |
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chip->vendor.timeout_c, &status); |
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if (rc) |
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goto out_err; |
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if ((status & TPM_STS_DATA_EXPECT) == 0) { |
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rc = -EIO; |
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@ -508,20 +553,14 @@ static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len) |
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} |
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} |
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/* Write last byte */ |
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iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality), &(buf[count]), 1); |
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wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c, &status); |
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if ((status & TPM_STS_DATA_EXPECT) != 0) { |
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rc = -EIO; |
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goto out_err; |
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} |
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/* Go and do it */ |
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iic_tpm_write(TPM_STS(chip->vendor.locality), &sts, 1); |
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debug("done\n"); |
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return len; |
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out_err: |
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debug("%s: out_err\n", __func__); |
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tpm_tis_i2c_ready(chip); |
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/*
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* The TPM needs some time to clean up here, |
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@ -558,26 +597,17 @@ static enum i2c_chip_type tpm_vendor_chip_type(void) |
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return UNKNOWN; |
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} |
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/* Initialisation of i2c tpm */ |
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int tpm_vendor_init(uint32_t dev_addr) |
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static int tpm_vendor_init_common(void) |
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{ |
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struct tpm_chip *chip; |
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u32 vendor; |
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u32 expected_did_vid; |
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uint old_addr; |
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int rc = 0; |
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struct tpm_chip *chip; |
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old_addr = tpm_dev.addr; |
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if (dev_addr != 0) |
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tpm_dev.addr = dev_addr; |
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tpm_dev.chip_type = tpm_vendor_chip_type(); |
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chip = tpm_register_hardware(&tpm_tis_i2c); |
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if (chip < 0) { |
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rc = -ENODEV; |
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goto out_err; |
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} |
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if (chip < 0) |
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return -ENODEV; |
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/* Disable interrupts (not supported) */ |
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chip->vendor.irq = 0; |
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@ -588,15 +618,13 @@ int tpm_vendor_init(uint32_t dev_addr) |
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chip->vendor.timeout_c = TIS_SHORT_TIMEOUT; |
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chip->vendor.timeout_d = TIS_SHORT_TIMEOUT; |
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if (request_locality(chip, 0) < 0) { |
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rc = -ENODEV; |
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goto out_err; |
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} |
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if (request_locality(chip, 0) < 0) |
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return -ENODEV; |
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/* Read four bytes from DID_VID register */ |
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if (iic_tpm_read(TPM_DID_VID(0), (uchar *)&vendor, 4) < 0) { |
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rc = -EIO; |
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goto out_release; |
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release_locality(chip, 0, 1); |
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return -EIO; |
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} |
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if (tpm_dev.chip_type == SLB9635) { |
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@ -609,8 +637,7 @@ int tpm_vendor_init(uint32_t dev_addr) |
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if (tpm_dev.chip_type != UNKNOWN && vendor != expected_did_vid) { |
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error("Vendor id did not match! ID was %08x\n", vendor); |
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rc = -ENODEV; |
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goto out_release; |
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return -ENODEV; |
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} |
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debug("1.2 TPM (chip type %s device-id 0x%X)\n", |
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@ -622,14 +649,33 @@ int tpm_vendor_init(uint32_t dev_addr) |
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*/ |
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return 0; |
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} |
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#ifdef CONFIG_DM_I2C |
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/* Initialisation of i2c tpm */ |
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int tpm_vendor_init_dev(struct udevice *dev) |
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{ |
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tpm_dev.dev = dev; |
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return tpm_vendor_init_common(); |
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} |
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#else |
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/* Initialisation of i2c tpm */ |
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int tpm_vendor_init(uint32_t dev_addr) |
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{ |
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uint old_addr; |
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int rc = 0; |
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out_release: |
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release_locality(chip, 0, 1); |
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old_addr = tpm_dev.addr; |
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if (dev_addr != 0) |
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tpm_dev.addr = dev_addr; |
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rc = tpm_vendor_init_common(); |
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if (rc) |
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tpm_dev.addr = old_addr; |
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out_err: |
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tpm_dev.addr = old_addr; |
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return rc; |
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} |
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#endif |
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void tpm_vendor_cleanup(struct tpm_chip *chip) |
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{ |
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