125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
//
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// Copyright 2022 Wenting Zhang <zephray@outlook.com>
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// Copyright 2017 Jason Cerundolo
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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#include "tcpm_driver.h"
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#include "pico/stdlib.h"
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#include "hardware/i2c.h"
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#include "utils.h"
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const struct tcpc_config_t tcpc_config[CONFIG_USB_PD_PORT_COUNT] = {
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{0, FUSB302_I2C_SLAVE_ADDR, &fusb302_tcpm_drv},
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};
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#define TCPC_I2C i2c1
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void tcpc_i2c_init(void) {
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// Should be initialized at board level init to avoid dependencies between
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// drivers that need I2C
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}
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/* I2C wrapper functions - get I2C port / slave addr from config struct. */
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int tcpc_write(int port, int reg, int val) {
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uint8_t buf[2];
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int result;
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buf[0] = (uint8_t)reg;
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buf[1] = (uint8_t)val;
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result = i2c_write_blocking(TCPC_I2C, FUSB302_I2C_SLAVE_ADDR, buf, 2, false);
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if (result != 2) {
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fatal("Failed writing data to TCPC");
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}
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return 0;
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}
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int tcpc_write16(int port, int reg, int val) {
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uint8_t buf[3];
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int result;
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buf[0] = (uint8_t)reg;
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buf[1] = (uint8_t)(val & 0xff);
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buf[2] = (uint8_t)((val >> 8) & 0xff);
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result = i2c_write_blocking(TCPC_I2C, FUSB302_I2C_SLAVE_ADDR, buf, 3, false);
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if (result != 3) {
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fatal("Failed writing data to TCPC");
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}
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return 0;
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}
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int tcpc_read(int port, int reg, int *val) {
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int result;
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uint8_t buf[1];
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buf[0] = reg;
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result = i2c_write_blocking(TCPC_I2C, FUSB302_I2C_SLAVE_ADDR, buf, 1, true);
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if (result != 1) {
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fatal("Failed writing data to TCPC");
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}
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result = i2c_read_blocking(TCPC_I2C, FUSB302_I2C_SLAVE_ADDR, buf, 1, false);
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if (result != 1) {
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fatal("Failed reading data from TCPC");
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}
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*val = (int)buf[0];
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return 0;
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}
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int tcpc_read16(int port, int reg, int *val) {
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uint8_t buf[2];
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int result;
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buf[0] = reg;
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result = i2c_write_blocking(TCPC_I2C, FUSB302_I2C_SLAVE_ADDR, buf, 1, true);
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if (result != 1) {
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fatal("Failed writing data to TCPC");
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}
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result = i2c_read_blocking(TCPC_I2C, FUSB302_I2C_SLAVE_ADDR, buf, 2, false);
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if (result != 2) {
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fatal("Failed reading data from TCPC");
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}
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*val = (int)buf[1] << 8 | buf[0];
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return 0;
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}
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int tcpc_xfer(int port,
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const uint8_t *out, int out_size,
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uint8_t *in, int in_size,
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int flags) {
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int result;
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if (out_size) {
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result = i2c_write_blocking(TCPC_I2C, FUSB302_I2C_SLAVE_ADDR, out,
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out_size, !!(flags & I2C_XFER_STOP));
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if (result != out_size) {
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fatal("Failed writing data to TCPC");
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}
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}
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if (in_size) {
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result = i2c_read_blocking(TCPC_I2C, FUSB302_I2C_SLAVE_ADDR, in,
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in_size, !!(flags & I2C_XFER_STOP));
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if (result != in_size) {
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fatal("Failed reading data from TCPC");
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}
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}
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return 0;
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}
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