diff options
Diffstat (limited to 'zephyr/emul/tcpc/emul_tcpci_generic.c')
| -rw-r--r-- | zephyr/emul/tcpc/emul_tcpci_generic.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/zephyr/emul/tcpc/emul_tcpci_generic.c b/zephyr/emul/tcpc/emul_tcpci_generic.c new file mode 100644 index 0000000000..204e040ede --- /dev/null +++ b/zephyr/emul/tcpc/emul_tcpci_generic.c @@ -0,0 +1,185 @@ +/* Copyright 2022 The ChromiumOS Authors + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#define DT_DRV_COMPAT cros_tcpci_generic_emul + +#include <zephyr/logging/log.h> +LOG_MODULE_REGISTER(tcpci_generic_emul, CONFIG_TCPCI_EMUL_LOG_LEVEL); + +#include <zephyr/device.h> +#include <zephyr/drivers/emul.h> +#include <zephyr/drivers/i2c.h> +#include <zephyr/drivers/i2c_emul.h> +#include <zephyr/ztest.h> + +#include "tcpm/tcpci.h" +#include "emul/emul_stub_device.h" + +#include "emul/emul_common_i2c.h" +#include "emul/tcpc/emul_tcpci.h" + +/** + * @brief Function called for each byte of read message from TCPCI emulator + * + * @param emul Pointer to I2C TCPCI emulator + * @param reg First byte of last write message + * @param val Pointer where byte to read should be stored + * @param bytes Number of bytes already read + * + * @return 0 on success + * @return -EIO on invalid read request + */ +static int tcpci_generic_emul_read_byte(const struct emul *emul, int reg, + uint8_t *val, int bytes) +{ + LOG_DBG("TCPCI Generic 0x%x: read reg 0x%x", emul->bus.i2c->addr, reg); + + return tcpci_emul_read_byte(emul, reg, val, bytes); +} + +/** + * @brief Function called for each byte of write message to TCPCI emulator + * + * @param emul Pointer to I2C TCPCI emulator + * @param reg First byte of write message + * @param val Received byte of write message + * @param bytes Number of bytes already received + * + * @return 0 on success + * @return -EIO on invalid write request + */ +static int tcpci_generic_emul_write_byte(const struct emul *emul, int reg, + uint8_t val, int bytes) +{ + LOG_DBG("TCPCI Generic 0x%x: write reg 0x%x", emul->bus.i2c->addr, reg); + + return tcpci_emul_write_byte(emul, reg, val, bytes); +} + +/** + * @brief Function called on the end of write message to TCPCI emulator + * + * @param emul Pointer to I2C TCPCI emulator + * @param reg Register which is written + * @param msg_len Length of handled I2C message + * + * @return 0 on success + * @return -EIO on error + */ +static int tcpci_generic_emul_finish_write(const struct emul *emul, int reg, + int msg_len) +{ + LOG_DBG("TCPCI Generic 0x%x: finish write reg 0x%x", + emul->bus.i2c->addr, reg); + + return tcpci_emul_handle_write(emul, reg, msg_len); +} + +/** + * @brief Get currently accessed register, which always equals to selected + * register from TCPCI emulator. + * + * @param emul Pointer to I2C TCPCI emulator + * @param reg First byte of last write message + * @param bytes Number of bytes already handled from current message + * @param read If currently handled is read message + * + * @return Currently accessed register + */ +static int tcpci_generic_emul_access_reg(const struct emul *emul, int reg, + int bytes, bool read) +{ + return reg; +} + +/** + * @brief Function called on reset + * + * @param emul Pointer to TCPC emulator + */ +static void tcpci_generic_emul_reset(const struct emul *emul) +{ + tcpci_emul_reset(emul); +} + +/** + * @brief Set up a new TCPCI generic emulator + * + * This should be called for each TCPCI Generic device that needs to be + * emulated. + * + * @param emul Emulation information + * @param parent Device to emulate + * + * @return 0 indicating success (always) + */ +static int tcpci_generic_emul_init(const struct emul *emul, + const struct device *parent) +{ + struct tcpc_emul_data *tcpc_data = emul->data; + struct tcpci_ctx *tcpci_ctx = tcpc_data->tcpci_ctx; + const struct device *i2c_dev; + + i2c_dev = parent; + + tcpci_ctx->common.write_byte = tcpci_generic_emul_write_byte; + tcpci_ctx->common.finish_write = tcpci_generic_emul_finish_write; + tcpci_ctx->common.read_byte = tcpci_generic_emul_read_byte; + tcpci_ctx->common.access_reg = tcpci_generic_emul_access_reg; + + tcpci_emul_i2c_init(emul, i2c_dev); + + tcpci_generic_emul_reset(emul); + + return 0; +} + +static int i2c_tcpci_generic_emul_transfer(const struct emul *target, + struct i2c_msg *msgs, int num_msgs, + int addr) +{ + struct tcpc_emul_data *tcpc_data = target->data; + struct tcpci_ctx *tcpci_ctx = tcpc_data->tcpci_ctx; + + return i2c_common_emul_transfer_workhorse(target, &tcpci_ctx->common, + &tcpc_data->i2c_cfg, msgs, + num_msgs, addr); +} + +struct i2c_emul_api i2c_tcpci_generic_emul_api = { + .transfer = i2c_tcpci_generic_emul_transfer, +}; + +#define TCPCI_GENERIC_EMUL(n) \ + TCPCI_EMUL_DEFINE(n, tcpci_generic_emul_init, NULL, NULL, \ + &i2c_tcpci_generic_emul_api) + +DT_INST_FOREACH_STATUS_OKAY(TCPCI_GENERIC_EMUL) + +#ifdef CONFIG_ZTEST_NEW_API +#define TCPCI_GENERIC_EMUL_RESET_RULE_BEFORE(n) \ + tcpci_generic_emul_reset(EMUL_DT_GET(DT_DRV_INST(n))); +static void +tcpci_generic_emul_reset_rule_before(const struct ztest_unit_test *test, + void *data) +{ + ARG_UNUSED(test); + ARG_UNUSED(data); + DT_INST_FOREACH_STATUS_OKAY(TCPCI_GENERIC_EMUL_RESET_RULE_BEFORE); +} +ZTEST_RULE(tcpci_generic_emul_reset, tcpci_generic_emul_reset_rule_before, + NULL); +#endif /* CONFIG_ZTEST_NEW_API */ + +DT_INST_FOREACH_STATUS_OKAY(EMUL_STUB_DEVICE); + +struct i2c_common_emul_data * +emul_tcpci_generic_get_i2c_common_data(const struct emul *emul) +{ + struct tcpc_emul_data *tcpc_data = emul->data; + struct tcpci_ctx *tcpci_ctx = tcpc_data->tcpci_ctx; + + return &tcpci_ctx->common; +} |