diff options
Diffstat (limited to 'zephyr/emul/emul_pi3usb9201.c')
| -rw-r--r-- | zephyr/emul/emul_pi3usb9201.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/zephyr/emul/emul_pi3usb9201.c b/zephyr/emul/emul_pi3usb9201.c deleted file mode 100644 index babef58c75..0000000000 --- a/zephyr/emul/emul_pi3usb9201.c +++ /dev/null @@ -1,195 +0,0 @@ -/* Copyright 2021 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#define DT_DRV_COMPAT zephyr_pi3usb9201_emul - -#include <device.h> -#include <emul.h> -#include <drivers/i2c.h> -#include <drivers/i2c_emul.h> - -#include "emul/emul_pi3usb9201.h" - -#include <logging/log.h> -LOG_MODULE_REGISTER(emul_pi3usb9201, LOG_LEVEL_DBG); - -#define EMUL_REG_COUNT (PI3USB9201_REG_HOST_STS + 1) -#define EMUL_REG_IS_VALID(reg) (reg >= 0 && reg < EMUL_REG_COUNT) - -/** Run-time data used by the emulator */ -struct pi3usb9201_emul_data { - /** I2C emulator detail */ - struct i2c_emul emul; - /** pi3usb9201 device being emulated */ - const struct device *i2c; - /** Configuration information */ - const struct pi3usb9201_emul_cfg *cfg; - /** Current state of all emulated pi3usb9201 registers */ - uint8_t reg[EMUL_REG_COUNT]; -}; - -/** Static configuration for the emulator */ -struct pi3usb9201_emul_cfg { - /** Label of the I2C bus this emulator connects to */ - const char *i2c_label; - /** Pointer to run-time data */ - struct pi3usb9201_emul_data *data; - /** Address of pi3usb9201 on i2c bus */ - uint16_t addr; -}; - -int pi3usb9201_emul_set_reg(struct i2c_emul *emul, int reg, uint8_t val) -{ - struct pi3usb9201_emul_data *data; - - if (!EMUL_REG_IS_VALID(reg)) - return -EIO; - - data = CONTAINER_OF(emul, struct pi3usb9201_emul_data, emul); - data->reg[reg] = val; - - return 0; -} - -int pi3usb9201_emul_get_reg(struct i2c_emul *emul, int reg, uint8_t *val) -{ - struct pi3usb9201_emul_data *data; - - if (!EMUL_REG_IS_VALID(reg)) - return -EIO; - - data = CONTAINER_OF(emul, struct pi3usb9201_emul_data, emul); - *val = data->reg[reg]; - - return 0; -} - -static void pi3usb9201_emul_reset(struct i2c_emul *emul) -{ - struct pi3usb9201_emul_data *data; - - data = CONTAINER_OF(emul, struct pi3usb9201_emul_data, emul); - - data->reg[PI3USB9201_REG_CTRL_1] = 0; - data->reg[PI3USB9201_REG_CTRL_2] = 0; - data->reg[PI3USB9201_REG_CLIENT_STS] = 0; - data->reg[PI3USB9201_REG_HOST_STS] = 0; -} - -/** - * Emulate an I2C transfer to a pi3usb9201 - * - * This handles simple reads and writes - * - * @param emul I2C emulation information - * @param msgs List of messages to process - * @param num_msgs Number of messages to process - * @param addr Address of the I2C target device - * - * @retval 0 If successful - * @retval -EIO General input / output error - */ -static int pi3usb9201_emul_transfer(struct i2c_emul *emul, struct i2c_msg *msgs, - int num_msgs, int addr) -{ - const struct pi3usb9201_emul_cfg *cfg; - struct pi3usb9201_emul_data *data; - - data = CONTAINER_OF(emul, struct pi3usb9201_emul_data, emul); - cfg = data->cfg; - - if (cfg->addr != addr) { - LOG_ERR("Address mismatch, expected %02x, got %02x", cfg->addr, - addr); - return -EIO; - } - - i2c_dump_msgs("emul", msgs, num_msgs, addr); - - if (num_msgs == 1) { - if (!(((msgs[0].flags & I2C_MSG_RW_MASK) == I2C_MSG_WRITE) - && (msgs[0].len == 2))) { - LOG_ERR("Unexpected write msgs"); - return -EIO; - } - return pi3usb9201_emul_set_reg(emul, msgs[0].buf[0], - msgs[0].buf[1]); - } else if (num_msgs == 2) { - if (!(((msgs[0].flags & I2C_MSG_RW_MASK) == I2C_MSG_WRITE) - && (msgs[0].len == 1) - && ((msgs[1].flags & I2C_MSG_RW_MASK) == I2C_MSG_READ) - && (msgs[1].len == 1))) { - LOG_ERR("Unexpected read msgs"); - return -EIO; - } - return pi3usb9201_emul_get_reg(emul, msgs[0].buf[0], - &(msgs[1].buf[0])); - } else { - LOG_ERR("Unexpected num_msgs"); - return -EIO; - } - -} - -/* Device instantiation */ - -static struct i2c_emul_api pi3usb9201_emul_api = { - .transfer = pi3usb9201_emul_transfer, -}; - -/** - * @brief Set up a new pi3usb9201 emulator - * - * This should be called for each pi3usb9201 device that needs to be - * emulated. It registers it with the I2C emulation controller. - * - * @param emul Emulation information - * @param parent Device to emulate - * - * @return 0 indicating success (always) - */ -static int pi3usb9201_emul_init(const struct emul *emul, - const struct device *parent) -{ - const struct pi3usb9201_emul_cfg *cfg = emul->cfg; - struct pi3usb9201_emul_data *data = cfg->data; - int ret; - - data->emul.api = &pi3usb9201_emul_api; - data->emul.addr = cfg->addr; - data->i2c = parent; - data->cfg = cfg; - - ret = i2c_emul_register(parent, emul->dev_label, &data->emul); - - pi3usb9201_emul_reset(&data->emul); - - return ret; -} - -#define PI3USB9201_EMUL(n) \ - static struct pi3usb9201_emul_data pi3usb9201_emul_data_##n = {}; \ - static const struct pi3usb9201_emul_cfg pi3usb9201_emul_cfg_##n = { \ - .i2c_label = DT_INST_BUS_LABEL(n), \ - .data = &pi3usb9201_emul_data_##n, \ - .addr = DT_INST_REG_ADDR(n), \ - }; \ - EMUL_DEFINE(pi3usb9201_emul_init, DT_DRV_INST(n), \ - &pi3usb9201_emul_cfg_##n, &pi3usb9201_emul_data_##n) - -DT_INST_FOREACH_STATUS_OKAY(PI3USB9201_EMUL) - -#define PI3USB9201_EMUL_CASE(n) \ - case DT_INST_DEP_ORD(n): return &pi3usb9201_emul_data_##n.emul; - -struct i2c_emul *pi3usb9201_emul_get(int ord) -{ - switch (ord) { - DT_INST_FOREACH_STATUS_OKAY(PI3USB9201_EMUL_CASE) - - default: - return NULL; - } -} |