// SPDX-License-Identifier: GPL-2.0-or-later /* * ALSA driver for ICEnsemble VT1724 (Envy24HT) * * Lowlevel functions for AudioTrak Prodigy 192 cards * Supported IEC958 input from optional MI/ODI/O add-on card. * * Specifics (SW, HW): * ------------------- * * 49.5MHz crystal * * SPDIF-OUT on the card: * - coax (through isolation transformer)/toslink supplied by * 74HC04 gates - 3 in parallel * - output switched between on-board CD drive dig-out connector * and ice1724 SPDTX pin, using 74HC02 NOR gates, controlled * by GPIO20 (0 = CD dig-out, 1 = SPDTX) * * SPDTX goes straight to MI/ODI/O card's SPDIF-OUT coax * * * MI/ODI/O card: AK4114 based, used for iec958 input only * - toslink input -> RX0 * - coax input -> RX1 * - 4wire protocol: * AK4114 ICE1724 * ------------------------------ * CDTO (pin 32) -- GPIO11 pin 86 * CDTI (pin 33) -- GPIO10 pin 77 * CCLK (pin 34) -- GPIO9 pin 76 * CSN (pin 35) -- GPIO8 pin 75 * - output data Mode 7 (24bit, I2S, slave) * - both MCKO1 and MCKO2 of ak4114 are fed to FPGA, which * outputs master clock to SPMCLKIN of ice1724. * Experimentally I found out that only a combination of * OCKS0=1, OCKS1=1 (128fs, 64fs output) and ice1724 - * VT1724_MT_I2S_MCLK_128X=0 (256fs input) yields correct * sampling rate. That means that the FPGA doubles the * MCK01 rate. * * Copyright (c) 2003 Takashi Iwai <[email protected]> * Copyright (c) 2003 Dimitromanolakis Apostolos <[email protected]> * Copyright (c) 2004 Kouichi ONO <[email protected]> */ #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/slab.h> #include <sound/core.h> #include "ice1712.h" #include "envy24ht.h" #include "prodigy192.h" #include "stac946x.h" #include <sound/tlv.h> struct prodigy192_spec { … }; static inline void stac9460_put(struct snd_ice1712 *ice, int reg, unsigned char val) { … } static inline unsigned char stac9460_get(struct snd_ice1712 *ice, int reg) { … } /* * DAC mute control */ /* * idx = STAC9460 volume register number, mute: 0 = mute, 1 = unmute */ static int stac9460_dac_mute(struct snd_ice1712 *ice, int idx, unsigned char mute) { … } #define stac9460_dac_mute_info … static int stac9460_dac_mute_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int stac9460_dac_mute_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } /* * DAC volume attenuation mixer control */ static int stac9460_dac_vol_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int stac9460_dac_vol_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int stac9460_dac_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } /* * ADC mute control */ #define stac9460_adc_mute_info … static int stac9460_adc_mute_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int stac9460_adc_mute_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } /* * ADC gain mixer control */ static int stac9460_adc_vol_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int stac9460_adc_vol_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int stac9460_adc_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int stac9460_mic_sw_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int stac9460_mic_sw_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int stac9460_mic_sw_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } /* * Handler for setting correct codec rate - called when rate change is detected */ static void stac9460_set_rate_val(struct snd_ice1712 *ice, unsigned int rate) { … } static const DECLARE_TLV_DB_SCALE(db_scale_dac, -19125, 75, 0); static const DECLARE_TLV_DB_SCALE(db_scale_adc, 0, 150, 0); /* * mixers */ static const struct snd_kcontrol_new stac_controls[] = …; /* AK4114 - ICE1724 connections on Prodigy192 + MI/ODI/O */ /* CDTO (pin 32) -- GPIO11 pin 86 * CDTI (pin 33) -- GPIO10 pin 77 * CCLK (pin 34) -- GPIO9 pin 76 * CSN (pin 35) -- GPIO8 pin 75 */ #define AK4114_ADDR … /* * 4wire ak4114 protocol - writing data */ static void write_data(struct snd_ice1712 *ice, unsigned int gpio, unsigned int data, int idx) { … } /* * 4wire ak4114 protocol - reading data */ static unsigned char read_data(struct snd_ice1712 *ice, unsigned int gpio, int idx) { … } /* * 4wire ak4114 protocol - starting sequence */ static unsigned int prodigy192_4wire_start(struct snd_ice1712 *ice) { … } /* * 4wire ak4114 protocol - final sequence */ static void prodigy192_4wire_finish(struct snd_ice1712 *ice, unsigned int tmp) { … } /* * Write data to addr register of ak4114 */ static void prodigy192_ak4114_write(void *private_data, unsigned char addr, unsigned char data) { … } /* * Read data from addr register of ak4114 */ static unsigned char prodigy192_ak4114_read(void *private_data, unsigned char addr) { … } static int ak4114_input_sw_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int ak4114_input_sw_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int ak4114_input_sw_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static const struct snd_kcontrol_new ak4114_controls[] = …; static int prodigy192_ak4114_init(struct snd_ice1712 *ice) { … } static void stac9460_proc_regs_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { … } static void stac9460_proc_init(struct snd_ice1712 *ice) { … } static int prodigy192_add_controls(struct snd_ice1712 *ice) { … } /* * check for presence of MI/ODI/O add-on card with digital inputs */ static int prodigy192_miodio_exists(struct snd_ice1712 *ice) { … } /* * initialize the chip */ static int prodigy192_init(struct snd_ice1712 *ice) { … } /* * Aureon boards don't provide the EEPROM data except for the vendor IDs. * hence the driver needs to sets up it properly. */ static const unsigned char prodigy71_eeprom[] = …; /* entry point */ struct snd_ice1712_card_info snd_vt1724_prodigy192_cards[] = …;
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