Yaya48
cf256aa081
Upstream: https://gitlab.com/qemu-project/qemu.git Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* QTest utilities for TPM TIS over I2C
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*
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* Copyright (c) 2018, 2026 IBM Corporation
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*
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* Authors:
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* Stefan Berger <[email protected]>
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*
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*/
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#include "qemu/osdep.h"
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#include "hw/acpi/tpm.h"
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#include "libqtest-single.h"
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#include "qtest_aspeed.h"
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#include "tpm-tis-i2c-util.h"
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#include "tpm-emu.h"
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uint32_t aspeed_bus_addr;
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static uint8_t cur_locty = 0xff;
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static void tpm_tis_i2c_set_locty(QTestState *s, uint8_t locty)
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{
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if (cur_locty != locty) {
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cur_locty = locty;
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aspeed_i2c_writeb(s, aspeed_bus_addr, I2C_SLAVE_ADDR,
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TPM_I2C_REG_LOC_SEL, locty);
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}
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}
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uint8_t tpm_tis_i2c_readb(QTestState *s, uint8_t locty, uint8_t reg)
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{
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tpm_tis_i2c_set_locty(s, locty);
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return aspeed_i2c_readb(s, aspeed_bus_addr, I2C_SLAVE_ADDR, reg);
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}
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uint16_t tpm_tis_i2c_readw(QTestState *s, uint8_t locty, uint8_t reg)
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{
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tpm_tis_i2c_set_locty(s, locty);
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return aspeed_i2c_readw(global_qtest, aspeed_bus_addr, I2C_SLAVE_ADDR, reg);
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}
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uint32_t tpm_tis_i2c_readl(QTestState *s, uint8_t locty, uint8_t reg)
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{
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tpm_tis_i2c_set_locty(s, locty);
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return aspeed_i2c_readl(s, aspeed_bus_addr, I2C_SLAVE_ADDR, reg);
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}
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void tpm_tis_i2c_writeb(QTestState *s, uint8_t locty, uint8_t reg, uint8_t v)
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{
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if (reg != TPM_I2C_REG_LOC_SEL) {
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tpm_tis_i2c_set_locty(s, locty);
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}
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aspeed_i2c_writeb(s, aspeed_bus_addr, I2C_SLAVE_ADDR, reg, v);
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}
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void tpm_tis_i2c_writel(QTestState *s, uint8_t locty, uint8_t reg, uint32_t v)
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{
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if (reg != TPM_I2C_REG_LOC_SEL) {
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tpm_tis_i2c_set_locty(s, locty);
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}
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aspeed_i2c_writel(s, aspeed_bus_addr, I2C_SLAVE_ADDR, reg, v);
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}
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void tpm_tis_i2c_transfer(QTestState *s,
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const unsigned char *req, size_t req_size,
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unsigned char *rsp, size_t rsp_size)
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{
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uint32_t sts;
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size_t i;
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/* request use of locality 0 */
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tpm_tis_i2c_writeb(s, 0, TPM_I2C_REG_ACCESS, TPM_TIS_ACCESS_REQUEST_USE);
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tpm_tis_i2c_writel(s, 0, TPM_I2C_REG_STS, TPM_TIS_STS_COMMAND_READY);
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/* transmit command */
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for (i = 0; i < req_size; i++) {
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tpm_tis_i2c_writeb(s, 0, TPM_I2C_REG_DATA_FIFO, req[i]);
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}
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/* start processing */
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tpm_tis_i2c_writeb(s, 0, TPM_I2C_REG_STS, TPM_TIS_STS_TPM_GO);
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uint64_t end_time = g_get_monotonic_time() + 50 * G_TIME_SPAN_SECOND;
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do {
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sts = tpm_tis_i2c_readl(s, 0, TPM_I2C_REG_STS);
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if ((sts & TPM_TIS_STS_DATA_AVAILABLE) != 0) {
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break;
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}
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} while (g_get_monotonic_time() < end_time);
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/* read response */
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for (i = 0; i < rsp_size; i++) {
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rsp[i] = tpm_tis_i2c_readb(s, 0, TPM_I2C_REG_DATA_FIFO);
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}
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/* relinquish use of locality 0 */
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tpm_tis_i2c_writeb(s, 0,
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TPM_I2C_REG_ACCESS, TPM_TIS_ACCESS_ACTIVE_LOCALITY);
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}
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