// SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2019 Google LLC */ #define LOG_CATEGORY UCLASS_SOUND #include #include #include #include #include "rt5677.h" #include struct rt5677_priv { struct udevice *dev; }; /* RT5677 has 256 8-bit register addresses, and 16-bit register data */ struct rt5677_init_reg { u8 reg; u16 val; }; static struct rt5677_init_reg init_list[] = { {RT5677_LOUT1, 0x0800}, {RT5677_SIDETONE_CTRL, 0x0000}, {RT5677_STO1_ADC_DIG_VOL, 0x3F3F}, {RT5677_DAC1_DIG_VOL, 0x9090}, {RT5677_STO2_ADC_MIXER, 0xA441}, {RT5677_STO1_ADC_MIXER, 0x5480}, {RT5677_STO1_DAC_MIXER, 0x8A8A}, {RT5677_PWR_DIG1, 0x9800}, /* Power up I2S1 */ {RT5677_PWR_ANLG1, 0xE9D5}, {RT5677_PWR_ANLG2, 0x2CC0}, {RT5677_PWR_DSP2, 0x0C00}, {RT5677_I2S2_SDP, 0x0000}, {RT5677_CLK_TREE_CTRL1, 0x1111}, {RT5677_PLL1_CTRL1, 0x0000}, {RT5677_PLL1_CTRL2, 0x0000}, {RT5677_DIG_MISC, 0x0029}, {RT5677_GEN_CTRL1, 0x00FF}, {RT5677_GPIO_CTRL2, 0x0020}, {RT5677_PWR_DIG2, 0x9024}, /* Power on ADC Stereo Filters */ {RT5677_PDM_OUT_CTRL, 0x0088}, /* Unmute PDM, set stereo1 DAC */ {RT5677_PDM_DATA_CTRL1, 0x0001}, /* Sysclk to PDM filter divider 2 */ }; /** * rt5677_i2c_read() - Read a 16-bit register * * @priv: Private driver data * @reg: Register number to read * @returns data read or -ve on error */ static int rt5677_i2c_read(struct rt5677_priv *priv, uint reg) { u8 buf[2]; int ret; ret = dm_i2c_read(priv->dev, reg, buf, sizeof(u16)); if (ret) return ret; return buf[0] << 8 | buf[1]; } /** * rt5677_i2c_write() - Write a 16-bit register * * @priv: Private driver data * @reg: Register number to read * @data: Data to write * @returns 0 if OK, -ve on error */ static int rt5677_i2c_write(struct rt5677_priv *priv, uint reg, uint data) { u8 buf[2]; buf[0] = (data >> 8) & 0xff; buf[1] = data & 0xff; return dm_i2c_write(priv->dev, reg, buf, sizeof(u16)); } /** * rt5677_bic_or() - Set and clear bits of a codec register * * @priv: Private driver data * @reg: Register number to update * @bic: Mask of bits to clear * @set: Mask of bits to set * @returns 0 if OK, -ve on error * */ static int rt5677_bic_or(struct rt5677_priv *priv, uint reg, uint bic, uint set) { uint old, new_value; int ret; old = rt5677_i2c_read(priv, reg); if (old < 0) return old; new_value = (old & ~bic) | (set & bic); if (old != new_value) { ret = rt5677_i2c_write(priv, reg, new_value); if (ret) return ret; } return 0; } /** * rt5677_reg_init() - Initialise codec regs w/static/base values * * @priv: Private driver data * @returns 0 if OK, -ve on error */ static int rt5677_reg_init(struct rt5677_priv *priv) { int ret; int i; for (i = 0; i < ARRAY_SIZE(init_list); i++) { ret = rt5677_i2c_write(priv, init_list[i].reg, init_list[i].val); if (ret) return ret; } return 0; } #ifdef DEBUG static void debug_dump_5677_regs(struct rt5677_priv *priv, int swap) { uint i, reg_word; /* Show all 16-bit codec regs */ for (i = 0; i < RT5677_REG_CNT; i++) { if (i % 8 == 0) log_debug("\nMX%02x: ", i); rt5677_i2c_read(priv, (u8)i, ®_word); if (swap) log_debug("%04x ", swap_bytes16(reg_word)); else log_debug("%04x ", reg_word); } log_debug("\n"); /* Show all 16-bit 'private' codec regs */ for (i = 0; i < RT5677_PR_REG_CNT; i++) { if (i % 8 == 0) log_debug("\nPR%02x: ", i); rt5677_i2c_write(priv, RT5677_PRIV_INDEX, i); rt5677_i2c_read(priv, RT5677_PRIV_DATA, ®_word); if (swap) log_debug("%04x ", swap_bytes16(reg_word)); else log_debug("%04x ", reg_word); } log_debug("\n"); } #endif /* DEBUG */ static int rt5677_hw_params(struct rt5677_priv *priv, uint bits_per_sample) { int ret; switch (bits_per_sample) { case 16: ret = rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_DL_MASK, 0); if (ret) { log_debug("Error updating I2S1 Interface Ctrl reg\n"); return 1; } break; default: log_err("Illegal bits per sample %d\n", bits_per_sample); return -EINVAL; } return 0; } /** * rt5677_set_fmt() - set rt5677 I2S format * * @priv: Private driver data * @returns 0 if OK, -ve on error */ static int rt5677_set_fmt(struct rt5677_priv *priv) { int ret = 0; /* * Set format here: Assumes I2S, NB_NF, CBS_CFS * * CBS_CFS (Codec Bit Slave/Codec Frame Slave) */ ret = rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_MS_MASK, RT5677_I2S_MS_S); /* NB_NF (Normal Bit/Normal Frame) */ ret |= rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_BP_MASK, RT5677_I2S_BP_NOR); /* I2S mode */ ret |= rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_DF_MASK, RT5677_I2S_DF_I2S); /* A44: I2S2 (going to speaker amp) is master */ ret |= rt5677_bic_or(priv, RT5677_I2S2_SDP, RT5677_I2S_MS_MASK, RT5677_I2S_MS_M); if (ret) { log_err("Error updating I2S1 Interface Ctrl reg\n"); return ret; } return 0; } /** * rt5677_reset() - reset the audio codec * * @priv: Private driver data * @returns 0 if OK, -ve on error */ static int rt5677_reset(struct rt5677_priv *priv) { int ret; /* Reset the codec registers to their defaults */ ret = rt5677_i2c_write(priv, RT5677_RESET, RT5677_SW_RESET); if (ret) { log_err("Error resetting codec\n"); return ret; } return 0; } /** * Initialise rt5677 codec device * * @priv: Private driver data * @returns 0 if OK, -ve on error */ int rt5677_device_init(struct rt5677_priv *priv) { int ret; /* Read status reg */ ret = rt5677_i2c_read(priv, RT5677_RESET); if (ret < 0) return ret; log_debug("reg 00h, Software Reset & Status = 0x%04x\n", ret); /* Reset the codec/regs */ ret = rt5677_reset(priv); if (ret) return ret; ret = rt5677_i2c_read(priv, RT5677_VENDOR_ID1); if (ret < 0) { log_err("Error reading vendor ID\n"); return 1; } log_debug("Hardware ID: %0xX\n", ret); ret = rt5677_i2c_read(priv, RT5677_VENDOR_ID2); if (ret < 0) { log_err("Error reading vendor rev\n"); return 1; } log_debug("Hardware revision: %04x\n", ret); return 0; } static int rt5677_set_params(struct udevice *dev, int interface, int rate, int mclk_freq, int bits_per_sample, uint channels) { struct rt5677_priv *priv = dev_get_priv(dev); int ret; /* Initialise codec regs w/static/base values, same as Linux driver */ ret = rt5677_reg_init(priv); if (ret) return ret; ret = rt5677_hw_params(priv, bits_per_sample); if (ret) return ret; ret = rt5677_set_fmt(priv); if (ret) return ret; return 0; } static int rt5677_probe(struct udevice *dev) { struct rt5677_priv *priv = dev_get_priv(dev); priv->dev = dev; return rt5677_device_init(priv); } static const struct audio_codec_ops rt5677_ops = { .set_params = rt5677_set_params, }; static const struct udevice_id rt5677_ids[] = { { .compatible = "realtek,rt5677" }, { } }; U_BOOT_DRIVER(rt5677_drv) = { .name = "rt5677", .id = UCLASS_AUDIO_CODEC, .of_match = rt5677_ids, .ops = &rt5677_ops, .probe = rt5677_probe, .priv_auto = sizeof(struct rt5677_priv), };