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Merge pull request #89 from wizmo2/wm8978
Add support for WM8978 i2c dac
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| /* | ||
| * Squeezelite for esp32 | ||
| * | ||
| * (c) Wizmo 2021 | ||
| * Sebastien 2019 | ||
| * Philippe G. 2019, philippe_44@outlook.com | ||
| * | ||
| * This software is released under the MIT License. | ||
| * https://opensource.org/licenses/MIT | ||
| * | ||
| */ | ||
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| #include <freertos/FreeRTOS.h> | ||
| #include <freertos/task.h> | ||
| #include <driver/i2s.h> | ||
| #include "driver/i2c.h" | ||
| #include "esp_log.h" | ||
| #include "adac.h" | ||
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| #define WM8978 0x1A // for TTGO TAudio | ||
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| static const char TAG[] = "WM8978"; | ||
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| static void speaker(bool active) { } | ||
| static void headset(bool active) { } | ||
| static bool volume(unsigned left, unsigned right) { return false; } | ||
| static void power(adac_power_e mode); | ||
| static bool init(char *config, int i2c_port_num, i2s_config_t *i2s_config); | ||
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| static esp_err_t i2c_write_shadow(uint8_t reg, uint16_t val); | ||
| static uint16_t i2c_read_shadow(uint8_t reg); | ||
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| const struct adac_s dac_wm8978 = { "WM8978", init, adac_deinit, power, speaker, headset, volume }; | ||
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| // initiation table for non-readbale 9-bit i2c registers | ||
| static uint16_t WM8978_REGVAL_TBL[58] = { | ||
| 0X0000, 0X0000, 0X0000, 0X0000, 0X0050, 0X0000, 0X0140, 0X0000, | ||
| 0X0000, 0X0000, 0X0000, 0X00FF, 0X00FF, 0X0000, 0X0100, 0X00FF, | ||
| 0X00FF, 0X0000, 0X012C, 0X002C, 0X002C, 0X002C, 0X002C, 0X0000, | ||
| 0X0032, 0X0000, 0X0000, 0X0000, 0X0000, 0X0000, 0X0000, 0X0000, | ||
| 0X0038, 0X000B, 0X0032, 0X0000, 0X0008, 0X000C, 0X0093, 0X00E9, | ||
| 0X0000, 0X0000, 0X0000, 0X0000, 0X0003, 0X0010, 0X0010, 0X0100, | ||
| 0X0100, 0X0002, 0X0001, 0X0001, 0X0039, 0X0039, 0X0039, 0X0039, | ||
| 0X0001, 0X0001 | ||
| }; | ||
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| /**************************************************************************************** | ||
| * init | ||
| */ | ||
| static bool init(char *config, int i2c_port, i2s_config_t *i2s_config) { | ||
| // TODO: maybe add something here to confirm it is actually detected? | ||
| adac_init(config, i2c_port); | ||
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| ESP_LOGI(TAG, "WM8978 detected"); | ||
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| // init sequence | ||
| i2c_write_shadow(0, 0); | ||
| i2c_write_shadow(4, 16); | ||
| i2c_write_shadow(6, 0); | ||
| i2c_write_shadow(10, 8); | ||
| i2c_write_shadow(43, 16); | ||
| i2c_write_shadow(49, 102); | ||
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| // Configure system clk to GPIO0 for DAC MCLK input | ||
| ESP_LOGI(TAG, "Configuring MCLK on pin:%d", 0); | ||
| PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0_CLK_OUT1); | ||
| REG_WRITE(PIN_CTRL, 0xFFFFFFF0); | ||
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| return true; | ||
| } | ||
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| /**************************************************************************************** | ||
| * power | ||
| */ | ||
| static void power(adac_power_e mode) { | ||
| uint16_t *data, off[] = {0, 0, 0}, on[] = {11, 384, 111}; | ||
| data = (mode == ADAC_STANDBY || mode == ADAC_OFF) ? off : on; | ||
| i2c_write_shadow(1, data[0]); | ||
| i2c_write_shadow(2, data[1]); | ||
| i2c_write_shadow(3, data[2]); | ||
| } | ||
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| /**************************************************************************************** | ||
| * Write with custom reg/value structure | ||
| */ | ||
| static esp_err_t i2c_write_shadow(uint8_t reg, uint16_t val) { | ||
| WM8978_REGVAL_TBL[reg] = val; | ||
| reg = (reg << 1) | ((val >> 8) & 0x01); | ||
| val &= 0xff; | ||
| return adac_write_byte(WM8978, reg, val); | ||
| } | ||
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| /**************************************************************************************** | ||
| * Return local register value | ||
| */ | ||
| static uint16_t i2c_read_shadow(uint8_t reg) { | ||
| return WM8978_REGVAL_TBL[reg]; | ||
| } |
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