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140 lines
6.8 KiB
140 lines
6.8 KiB
from smbus2 import SMBus
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from collections import namedtuple
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# https://datasheets.maximintegrated.com/en/ds/MAX98089.pdf
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AmpConfig = namedtuple('AmpConfig', ['name', 'value', 'register', 'offset', 'mask'])
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EQParams = namedtuple('EQParams', ['K', 'k1', 'k2', 'c1', 'c2'])
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def configs_from_eq_params(base, eq_params):
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return [
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AmpConfig("K (high)", (eq_params.K >> 8), base, 0, 0xFF),
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AmpConfig("K (low)", (eq_params.K & 0xFF), base + 1, 0, 0xFF),
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AmpConfig("k1 (high)", (eq_params.k1 >> 8), base + 2, 0, 0xFF),
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AmpConfig("k1 (low)", (eq_params.k1 & 0xFF), base + 3, 0, 0xFF),
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AmpConfig("k2 (high)", (eq_params.k2 >> 8), base + 4, 0, 0xFF),
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AmpConfig("k2 (low)", (eq_params.k2 & 0xFF), base + 5, 0, 0xFF),
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AmpConfig("c1 (high)", (eq_params.c1 >> 8), base + 6, 0, 0xFF),
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AmpConfig("c1 (low)", (eq_params.c1 & 0xFF), base + 7, 0, 0xFF),
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AmpConfig("c2 (high)", (eq_params.c2 >> 8), base + 8, 0, 0xFF),
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AmpConfig("c2 (low)", (eq_params.c2 & 0xFF), base + 9, 0, 0xFF),
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]
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BASE_CONFIG = [
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AmpConfig("MCLK prescaler", 0b01, 0x10, 4, 0b00110000),
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AmpConfig("PM: enable speakers", 0b11, 0x4D, 4, 0b00110000),
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AmpConfig("PM: enable DACs", 0b11, 0x4D, 0, 0b00000011),
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AmpConfig("Enable PLL1", 0b1, 0x12, 7, 0b10000000),
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AmpConfig("Enable PLL2", 0b1, 0x1A, 7, 0b10000000),
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AmpConfig("DAI1: I2S mode", 0b00100, 0x14, 2, 0b01111100),
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AmpConfig("DAI2: I2S mode", 0b00100, 0x1C, 2, 0b01111100),
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AmpConfig("DAI1 Passband filtering: music mode", 0b1, 0x18, 7, 0b10000000),
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AmpConfig("DAI1 voice mode gain (DV1G)", 0b00, 0x2F, 4, 0b00110000),
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AmpConfig("DAI1 attenuation (DV1)", 0x0, 0x2F, 0, 0b00001111),
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AmpConfig("DAI2 attenuation (DV2)", 0x0, 0x31, 0, 0b00001111),
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AmpConfig("DAI2: DC blocking", 0b1, 0x20, 0, 0b00000001),
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AmpConfig("DAI2: High sample rate", 0b0, 0x20, 3, 0b00001000),
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AmpConfig("ALC enable", 0b1, 0x43, 7, 0b10000000),
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AmpConfig("ALC/excursion limiter release time", 0b101, 0x43, 4, 0b01110000),
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AmpConfig("ALC multiband enable", 0b1, 0x43, 3, 0b00001000),
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AmpConfig("DAI1 EQ enable", 0b0, 0x49, 0, 0b00000001),
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AmpConfig("DAI2 EQ clip detection disabled", 0b1, 0x32, 4, 0b00010000),
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AmpConfig("DAI2 EQ attenuation", 0x5, 0x32, 0, 0b00001111),
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AmpConfig("Excursion limiter upper corner freq", 0b100, 0x41, 4, 0b01110000),
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AmpConfig("Excursion limiter lower corner freq", 0b00, 0x41, 0, 0b00000011),
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AmpConfig("Excursion limiter threshold", 0b000, 0x42, 0, 0b00001111),
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AmpConfig("Distortion limit (THDCLP)", 0x6, 0x46, 4, 0b11110000),
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AmpConfig("Distortion limiter release time constant", 0b0, 0x46, 0, 0b00000001),
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AmpConfig("Right DAC input mixer: DAI1 left", 0b0, 0x22, 3, 0b00001000),
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AmpConfig("Right DAC input mixer: DAI1 right", 0b0, 0x22, 2, 0b00000100),
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AmpConfig("Right DAC input mixer: DAI2 left", 0b1, 0x22, 1, 0b00000010),
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AmpConfig("Right DAC input mixer: DAI2 right", 0b0, 0x22, 0, 0b00000001),
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AmpConfig("DAI1 audio port selector", 0b10, 0x16, 6, 0b11000000),
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AmpConfig("DAI2 audio port selector", 0b01, 0x1E, 6, 0b11000000),
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AmpConfig("Enable left digital microphone", 0b1, 0x48, 5, 0b00100000),
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AmpConfig("Enable right digital microphone", 0b1, 0x48, 4, 0b00010000),
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AmpConfig("Enhanced volume smoothing disabled", 0b0, 0x49, 7, 0b10000000),
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AmpConfig("Volume adjustment smoothing disabled", 0b0, 0x49, 6, 0b01000000),
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AmpConfig("Zero-crossing detection disabled", 0b0, 0x49, 5, 0b00100000),
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]
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CONFIGS = {
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"tici": [
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AmpConfig("Right speaker output from right DAC", 0b1, 0x2C, 0, 0b11111111),
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AmpConfig("Right Speaker Mixer Gain", 0b00, 0x2D, 2, 0b00001100),
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AmpConfig("Right speaker output volume", 0x1c, 0x3E, 0, 0b00011111),
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AmpConfig("DAI2 EQ enable", 0b1, 0x49, 1, 0b00000010),
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*configs_from_eq_params(0x84, EQParams(0x274F, 0xC0FF, 0x3BF9, 0x0B3C, 0x1656)),
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*configs_from_eq_params(0x8E, EQParams(0x1009, 0xC6BF, 0x2952, 0x1C97, 0x30DF)),
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*configs_from_eq_params(0x98, EQParams(0x0F75, 0xCBE5, 0x0ED2, 0x2528, 0x3E42)),
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*configs_from_eq_params(0xA2, EQParams(0x091F, 0x3D4C, 0xCE11, 0x1266, 0x2807)),
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*configs_from_eq_params(0xAC, EQParams(0x0A9E, 0x3F20, 0xE573, 0x0A8B, 0x3A3B)),
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],
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"tizi": [
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AmpConfig("Left speaker output from left DAC", 0b1, 0x2B, 0, 0b11111111),
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AmpConfig("Right speaker output from right DAC", 0b1, 0x2C, 0, 0b11111111),
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AmpConfig("Left Speaker Mixer Gain", 0b00, 0x2D, 0, 0b00000011),
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AmpConfig("Right Speaker Mixer Gain", 0b00, 0x2D, 2, 0b00001100),
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AmpConfig("Left speaker output volume", 0x17, 0x3D, 0, 0b00011111),
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AmpConfig("Right speaker output volume", 0x17, 0x3E, 0, 0b00011111),
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AmpConfig("DAI2 EQ enable", 0b0, 0x49, 1, 0b00000010),
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AmpConfig("DAI2: DC blocking", 0b0, 0x20, 0, 0b00000001),
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AmpConfig("ALC enable", 0b0, 0x43, 7, 0b10000000),
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AmpConfig("DAI2 EQ attenuation", 0x2, 0x32, 0, 0b00001111),
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AmpConfig("Excursion limiter upper corner freq", 0b001, 0x41, 4, 0b01110000),
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AmpConfig("Excursion limiter threshold", 0b100, 0x42, 0, 0b00001111),
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AmpConfig("Distortion limit (THDCLP)", 0x0, 0x46, 4, 0b11110000),
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AmpConfig("Distortion limiter release time constant", 0b1, 0x46, 0, 0b00000001),
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AmpConfig("Left DAC input mixer: DAI1 left", 0b0, 0x22, 7, 0b10000000),
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AmpConfig("Left DAC input mixer: DAI1 right", 0b0, 0x22, 6, 0b01000000),
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AmpConfig("Left DAC input mixer: DAI2 left", 0b1, 0x22, 5, 0b00100000),
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AmpConfig("Left DAC input mixer: DAI2 right", 0b0, 0x22, 4, 0b00010000),
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AmpConfig("Right DAC input mixer: DAI2 left", 0b0, 0x22, 1, 0b00000010),
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AmpConfig("Right DAC input mixer: DAI2 right", 0b1, 0x22, 0, 0b00000001),
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AmpConfig("Volume adjustment smoothing disabled", 0b1, 0x49, 6, 0b01000000),
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],
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}
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class Amplifier:
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AMP_I2C_BUS = 0
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AMP_ADDRESS = 0x10
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def __init__(self, debug=False):
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self.debug = debug
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def set_config(self, config):
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with SMBus(self.AMP_I2C_BUS) as bus:
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if self.debug:
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print(f"Setting \"{config.name}\" to {config.value}:")
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old_value = bus.read_byte_data(self.AMP_ADDRESS, config.register, force=True)
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new_value = (old_value & (~config.mask)) | ((config.value << config.offset) & config.mask)
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bus.write_byte_data(self.AMP_ADDRESS, config.register, new_value, force=True)
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if self.debug:
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print(f" Changed {hex(config.register)}: {hex(old_value)} -> {hex(new_value)}")
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def set_global_shutdown(self, amp_disabled):
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self.set_config(AmpConfig("Global shutdown", 0b0 if amp_disabled else 0b1, 0x51, 7, 0b10000000))
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def initialize_configuration(self, model):
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self.set_global_shutdown(amp_disabled=True)
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for config in BASE_CONFIG:
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self.set_config(config)
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for config in CONFIGS[model]:
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self.set_config(config)
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self.set_global_shutdown(amp_disabled=False)
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if __name__ == "__main__":
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with open("/sys/firmware/devicetree/base/model") as f:
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model = f.read().strip('\x00')
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model = model.split('comma ')[-1]
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amp = Amplifier()
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amp.initialize_configuration(model)
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