1 // SPDX-License-Identifier: GPL-2.0+
3 * max98095.c -- MAX98095 ALSA SoC Audio driver
5 * Copyright 2011 Maxim Integrated Products
11 #include <audio_codec.h>
22 /* Index 0 is reserved. */
23 int rate_table[] = {0, 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000,
27 * codec mclk clock divider coefficients based on sampling rate
29 * @param rate sampling rate
30 * @param value address of indexvalue to be stored
32 * Return: 0 for success or negative error code.
34 static int rate_value(int rate, u8 *value)
38 for (i = 1; i < ARRAY_SIZE(rate_table); i++) {
39 if (rate_table[i] >= rate) {
50 * Sets hw params for max98095
52 * @param priv max98095 information pointer
53 * @param rate Sampling rate
54 * @param bits_per_sample Bits per sample
56 * Return: 0 for success or negative error code.
58 static int max98095_hw_params(struct maxim_priv *priv,
59 enum en_max_audio_interface aif_id,
60 unsigned int rate, unsigned int bits_per_sample)
64 unsigned short M98095_DAI_CLKMODE;
65 unsigned short M98095_DAI_FORMAT;
66 unsigned short M98095_DAI_FILTERS;
69 M98095_DAI_CLKMODE = M98095_027_DAI1_CLKMODE;
70 M98095_DAI_FORMAT = M98095_02A_DAI1_FORMAT;
71 M98095_DAI_FILTERS = M98095_02E_DAI1_FILTERS;
73 M98095_DAI_CLKMODE = M98095_031_DAI2_CLKMODE;
74 M98095_DAI_FORMAT = M98095_034_DAI2_FORMAT;
75 M98095_DAI_FILTERS = M98095_038_DAI2_FILTERS;
78 switch (bits_per_sample) {
80 error = maxim_bic_or(priv, M98095_DAI_FORMAT, M98095_DAI_WS, 0);
83 error = maxim_bic_or(priv, M98095_DAI_FORMAT, M98095_DAI_WS,
87 debug("%s: Illegal bits per sample %d.\n",
88 __func__, bits_per_sample);
92 if (rate_value(rate, ®val)) {
93 debug("%s: Failed to set sample rate to %d.\n",
99 error |= maxim_bic_or(priv, M98095_DAI_CLKMODE, M98095_CLKMODE_MASK,
102 /* Update sample rate mode */
104 error |= maxim_bic_or(priv, M98095_DAI_FILTERS,
107 error |= maxim_bic_or(priv, M98095_DAI_FILTERS,
108 M98095_DAI_DHF, M98095_DAI_DHF);
111 debug("%s: Error setting hardware params.\n", __func__);
119 * Configures Audio interface system clock for the given frequency
121 * @param priv max98095 information
122 * @param freq Sampling frequency in Hz
124 * Return: 0 for success or negative error code.
126 static int max98095_set_sysclk(struct maxim_priv *priv, unsigned int freq)
130 /* Requested clock frequency is already setup */
131 if (freq == priv->sysclk)
134 /* Setup clocks for slave mode, and using the PLL
135 * PSCLK = 0x01 (when master clk is 10MHz to 20MHz)
136 * 0x02 (when master clk is 20MHz to 40MHz)..
137 * 0x03 (when master clk is 40MHz to 60MHz)..
139 if ((freq >= 10000000) && (freq < 20000000)) {
140 error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x10);
141 } else if ((freq >= 20000000) && (freq < 40000000)) {
142 error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x20);
143 } else if ((freq >= 40000000) && (freq < 60000000)) {
144 error = maxim_i2c_write(priv, M98095_026_SYS_CLK, 0x30);
146 debug("%s: Invalid master clock frequency\n", __func__);
150 debug("%s: Clock at %uHz\n", __func__, freq);
160 * Sets Max98095 I2S format
162 * @param priv max98095 information
163 * @param fmt i2S format - supports a subset of the options defined
166 * Return: 0 for success or negative error code.
168 static int max98095_set_fmt(struct maxim_priv *priv, int fmt,
169 enum en_max_audio_interface aif_id)
173 unsigned short M98095_DAI_CLKCFG_HI;
174 unsigned short M98095_DAI_CLKCFG_LO;
175 unsigned short M98095_DAI_FORMAT;
176 unsigned short M98095_DAI_CLOCK;
178 if (fmt == priv->fmt)
183 if (aif_id == AIF1) {
184 M98095_DAI_CLKCFG_HI = M98095_028_DAI1_CLKCFG_HI;
185 M98095_DAI_CLKCFG_LO = M98095_029_DAI1_CLKCFG_LO;
186 M98095_DAI_FORMAT = M98095_02A_DAI1_FORMAT;
187 M98095_DAI_CLOCK = M98095_02B_DAI1_CLOCK;
189 M98095_DAI_CLKCFG_HI = M98095_032_DAI2_CLKCFG_HI;
190 M98095_DAI_CLKCFG_LO = M98095_033_DAI2_CLKCFG_LO;
191 M98095_DAI_FORMAT = M98095_034_DAI2_FORMAT;
192 M98095_DAI_CLOCK = M98095_035_DAI2_CLOCK;
195 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
196 case SND_SOC_DAIFMT_CBS_CFS:
198 error |= maxim_i2c_write(priv, M98095_DAI_CLKCFG_HI, 0x80);
199 error |= maxim_i2c_write(priv, M98095_DAI_CLKCFG_LO, 0x00);
201 case SND_SOC_DAIFMT_CBM_CFM:
202 /* Set to master mode */
203 regval |= M98095_DAI_MAS;
205 case SND_SOC_DAIFMT_CBS_CFM:
206 case SND_SOC_DAIFMT_CBM_CFS:
208 debug("%s: Clock mode unsupported\n", __func__);
212 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
213 case SND_SOC_DAIFMT_I2S:
214 regval |= M98095_DAI_DLY;
216 case SND_SOC_DAIFMT_LEFT_J:
219 debug("%s: Unrecognized format.\n", __func__);
223 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
224 case SND_SOC_DAIFMT_NB_NF:
226 case SND_SOC_DAIFMT_NB_IF:
227 regval |= M98095_DAI_WCI;
229 case SND_SOC_DAIFMT_IB_NF:
230 regval |= M98095_DAI_BCI;
232 case SND_SOC_DAIFMT_IB_IF:
233 regval |= M98095_DAI_BCI | M98095_DAI_WCI;
236 debug("%s: Unrecognized inversion settings.\n", __func__);
240 error |= maxim_bic_or(priv, M98095_DAI_FORMAT,
241 M98095_DAI_MAS | M98095_DAI_DLY |
242 M98095_DAI_BCI | M98095_DAI_WCI, regval);
244 error |= maxim_i2c_write(priv, M98095_DAI_CLOCK, M98095_DAI_BSEL64);
247 debug("%s: Error setting i2s format.\n", __func__);
255 * resets the audio codec
257 * @param priv Private data for driver
258 * Return: 0 for success or negative error code.
260 static int max98095_reset(struct maxim_priv *priv)
265 * Gracefully reset the DSP core and the codec hardware in a proper
268 ret = maxim_i2c_write(priv, M98095_00F_HOST_CFG, 0);
270 debug("%s: Failed to reset DSP: %d\n", __func__, ret);
274 ret = maxim_i2c_write(priv, M98095_097_PWR_SYS, 0);
276 debug("%s: Failed to reset codec: %d\n", __func__, ret);
281 * Reset to hardware default for registers, as there is not a soft
282 * reset hardware control register.
284 for (i = M98095_010_HOST_INT_CFG; i < M98095_REG_MAX_CACHED; i++) {
285 ret = maxim_i2c_write(priv, i, 0);
287 debug("%s: Failed to reset: %d\n", __func__, ret);
296 * Intialise max98095 codec device
298 * @param priv max98095 information
299 * Return: 0 for success or negative error code.
301 static int max98095_device_init(struct maxim_priv *priv)
306 /* reset the codec, the DSP core, and disable all interrupts */
307 ret = max98095_reset(priv);
313 /* initialize private data */
318 ret = maxim_i2c_read(priv, M98095_0FF_REV_ID, &id);
320 debug("%s: Failure reading hardware revision: %d\n",
324 debug("%s: Hardware revision: %c\n", __func__, (id - 0x40) + 'A');
329 static int max98095_setup_interface(struct maxim_priv *priv,
330 enum en_max_audio_interface aif_id)
334 error = maxim_i2c_write(priv, M98095_097_PWR_SYS, M98095_PWRSV);
337 * initialize registers to hardware default configuring audio
341 error |= maxim_i2c_write(priv, M98095_048_MIX_DAC_LR,
342 M98095_DAI1L_TO_DACL |
343 M98095_DAI1R_TO_DACR);
345 error |= maxim_i2c_write(priv, M98095_048_MIX_DAC_LR,
346 M98095_DAI2M_TO_DACL |
347 M98095_DAI2M_TO_DACR);
349 error |= maxim_i2c_write(priv, M98095_092_PWR_EN_OUT,
350 M98095_SPK_SPREADSPECTRUM);
351 error |= maxim_i2c_write(priv, M98095_04E_CFG_HP, M98095_HPNORMAL);
353 error |= maxim_i2c_write(priv, M98095_02C_DAI1_IOCFG,
354 M98095_S1NORMAL | M98095_SDATA);
356 error |= maxim_i2c_write(priv, M98095_036_DAI2_IOCFG,
357 M98095_S2NORMAL | M98095_SDATA);
359 /* take the codec out of the shut down */
360 error |= maxim_bic_or(priv, M98095_097_PWR_SYS, M98095_SHDNRUN,
363 * route DACL and DACR output to HO and Speakers
364 * Ordering: DACL, DACR, DACL, DACR
366 error |= maxim_i2c_write(priv, M98095_050_MIX_SPK_LEFT, 0x01);
367 error |= maxim_i2c_write(priv, M98095_051_MIX_SPK_RIGHT, 0x01);
368 error |= maxim_i2c_write(priv, M98095_04C_MIX_HP_LEFT, 0x01);
369 error |= maxim_i2c_write(priv, M98095_04D_MIX_HP_RIGHT, 0x01);
372 error |= maxim_i2c_write(priv, M98095_091_PWR_EN_OUT, 0xF3);
375 error |= maxim_i2c_write(priv, M98095_064_LVL_HP_L, 15);
376 error |= maxim_i2c_write(priv, M98095_065_LVL_HP_R, 15);
377 error |= maxim_i2c_write(priv, M98095_067_LVL_SPK_L, 16);
378 error |= maxim_i2c_write(priv, M98095_068_LVL_SPK_R, 16);
381 error |= maxim_i2c_write(priv, M98095_093_BIAS_CTRL, 0x30);
383 error |= maxim_i2c_write(priv, M98095_096_PWR_DAC_CK, 0x01);
385 error |= maxim_i2c_write(priv, M98095_096_PWR_DAC_CK, 0x07);
393 static int max98095_do_init(struct maxim_priv *priv,
394 enum en_max_audio_interface aif_id,
395 int sampling_rate, int mclk_freq,
400 ret = max98095_setup_interface(priv, aif_id);
402 debug("%s: max98095 setup interface failed\n", __func__);
406 ret = max98095_set_sysclk(priv, mclk_freq);
408 debug("%s: max98095 codec set sys clock failed\n", __func__);
412 ret = max98095_hw_params(priv, aif_id, sampling_rate,
416 ret = max98095_set_fmt(priv, SND_SOC_DAIFMT_I2S |
417 SND_SOC_DAIFMT_NB_NF |
418 SND_SOC_DAIFMT_CBS_CFS,
425 static int max98095_set_params(struct udevice *dev, int interface, int rate,
426 int mclk_freq, int bits_per_sample,
429 struct maxim_priv *priv = dev_get_priv(dev);
431 return max98095_do_init(priv, interface, rate, mclk_freq,
435 static int max98095_probe(struct udevice *dev)
437 struct maxim_priv *priv = dev_get_priv(dev);
441 ret = max98095_device_init(priv);
443 debug("%s: max98095 codec chip init failed\n", __func__);
450 static const struct audio_codec_ops max98095_ops = {
451 .set_params = max98095_set_params,
454 static const struct udevice_id max98095_ids[] = {
455 { .compatible = "maxim,max98095" },
459 U_BOOT_DRIVER(max98095) = {
461 .id = UCLASS_AUDIO_CODEC,
462 .of_match = max98095_ids,
463 .probe = max98095_probe,
464 .ops = &max98095_ops,
465 .priv_auto = sizeof(struct maxim_priv),