822 lines
22 KiB
C
Executable File
822 lines
22 KiB
C
Executable File
/*
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* wm8940.c -- WM8940 ALSA Soc Audio driver
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*
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* Author: Jonathan Cameron <jic23@cam.ac.uk>
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*
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* Based on wm8510.c
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* Copyright 2006 Wolfson Microelectronics PLC.
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* Author: Liam Girdwood <lrg@slimlogic.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Not currently handled:
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* Notch filter control
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* AUXMode (inverting vs mixer)
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* No means to obtain current gain if alc enabled.
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* No use made of gpio
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* Fast VMID discharge for power down
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* Soft Start
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* DLR and ALR Swaps not enabled
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* Digital Sidetone not supported
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/pm.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/initval.h>
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#include <sound/tlv.h>
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#include "wm8940.h"
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struct wm8940_priv {
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unsigned int sysclk;
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struct regmap *regmap;
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};
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static bool wm8940_volatile_register(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case WM8940_SOFTRESET:
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return true;
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default:
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return false;
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}
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}
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static bool wm8940_readable_register(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case WM8940_SOFTRESET:
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case WM8940_POWER1:
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case WM8940_POWER2:
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case WM8940_POWER3:
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case WM8940_IFACE:
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case WM8940_COMPANDINGCTL:
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case WM8940_CLOCK:
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case WM8940_ADDCNTRL:
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case WM8940_GPIO:
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case WM8940_CTLINT:
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case WM8940_DAC:
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case WM8940_DACVOL:
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case WM8940_ADC:
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case WM8940_ADCVOL:
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case WM8940_NOTCH1:
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case WM8940_NOTCH2:
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case WM8940_NOTCH3:
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case WM8940_NOTCH4:
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case WM8940_NOTCH5:
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case WM8940_NOTCH6:
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case WM8940_NOTCH7:
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case WM8940_NOTCH8:
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case WM8940_DACLIM1:
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case WM8940_DACLIM2:
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case WM8940_ALC1:
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case WM8940_ALC2:
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case WM8940_ALC3:
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case WM8940_NOISEGATE:
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case WM8940_PLLN:
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case WM8940_PLLK1:
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case WM8940_PLLK2:
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case WM8940_PLLK3:
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case WM8940_ALC4:
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case WM8940_INPUTCTL:
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case WM8940_PGAGAIN:
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case WM8940_ADCBOOST:
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case WM8940_OUTPUTCTL:
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case WM8940_SPKMIX:
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case WM8940_SPKVOL:
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case WM8940_MONOMIX:
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return true;
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default:
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return false;
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}
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}
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static const struct reg_default wm8940_reg_defaults[] = {
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{ 0x1, 0x0000 }, /* Power 1 */
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{ 0x2, 0x0000 }, /* Power 2 */
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{ 0x3, 0x0000 }, /* Power 3 */
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{ 0x4, 0x0010 }, /* Interface Control */
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{ 0x5, 0x0000 }, /* Companding Control */
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{ 0x6, 0x0140 }, /* Clock Control */
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{ 0x7, 0x0000 }, /* Additional Controls */
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{ 0x8, 0x0000 }, /* GPIO Control */
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{ 0x9, 0x0002 }, /* Auto Increment Control */
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{ 0xa, 0x0000 }, /* DAC Control */
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{ 0xb, 0x00FF }, /* DAC Volume */
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{ 0xe, 0x0100 }, /* ADC Control */
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{ 0xf, 0x00FF }, /* ADC Volume */
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{ 0x10, 0x0000 }, /* Notch Filter 1 Control 1 */
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{ 0x11, 0x0000 }, /* Notch Filter 1 Control 2 */
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{ 0x12, 0x0000 }, /* Notch Filter 2 Control 1 */
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{ 0x13, 0x0000 }, /* Notch Filter 2 Control 2 */
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{ 0x14, 0x0000 }, /* Notch Filter 3 Control 1 */
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{ 0x15, 0x0000 }, /* Notch Filter 3 Control 2 */
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{ 0x16, 0x0000 }, /* Notch Filter 4 Control 1 */
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{ 0x17, 0x0000 }, /* Notch Filter 4 Control 2 */
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{ 0x18, 0x0032 }, /* DAC Limit Control 1 */
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{ 0x19, 0x0000 }, /* DAC Limit Control 2 */
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{ 0x20, 0x0038 }, /* ALC Control 1 */
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{ 0x21, 0x000B }, /* ALC Control 2 */
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{ 0x22, 0x0032 }, /* ALC Control 3 */
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{ 0x23, 0x0000 }, /* Noise Gate */
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{ 0x24, 0x0041 }, /* PLLN */
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{ 0x25, 0x000C }, /* PLLK1 */
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{ 0x26, 0x0093 }, /* PLLK2 */
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{ 0x27, 0x00E9 }, /* PLLK3 */
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{ 0x2a, 0x0030 }, /* ALC Control 4 */
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{ 0x2c, 0x0002 }, /* Input Control */
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{ 0x2d, 0x0050 }, /* PGA Gain */
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{ 0x2f, 0x0002 }, /* ADC Boost Control */
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{ 0x31, 0x0002 }, /* Output Control */
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{ 0x32, 0x0000 }, /* Speaker Mixer Control */
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{ 0x36, 0x0079 }, /* Speaker Volume */
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{ 0x38, 0x0000 }, /* Mono Mixer Control */
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};
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static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
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static SOC_ENUM_SINGLE_DECL(wm8940_adc_companding_enum,
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WM8940_COMPANDINGCTL, 1, wm8940_companding);
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static SOC_ENUM_SINGLE_DECL(wm8940_dac_companding_enum,
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WM8940_COMPANDINGCTL, 3, wm8940_companding);
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static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
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static SOC_ENUM_SINGLE_DECL(wm8940_alc_mode_enum,
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WM8940_ALC3, 8, wm8940_alc_mode_text);
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static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
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static SOC_ENUM_SINGLE_DECL(wm8940_mic_bias_level_enum,
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WM8940_INPUTCTL, 8, wm8940_mic_bias_level_text);
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static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
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static SOC_ENUM_SINGLE_DECL(wm8940_filter_mode_enum,
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WM8940_ADC, 7, wm8940_filter_mode_text);
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static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
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static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
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static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
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static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
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static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
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static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
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static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
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static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
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static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
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static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
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static const struct snd_kcontrol_new wm8940_snd_controls[] = {
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SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
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6, 1, 0),
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SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
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SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
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SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
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SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
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SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
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3, 7, 1, wm8940_alc_max_tlv),
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SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
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0, 7, 0, wm8940_alc_min_tlv),
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SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
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0, 14, 0, wm8940_alc_tar_tlv),
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SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
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SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
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SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
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SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
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SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
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3, 1, 0),
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SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
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0, 7, 0),
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SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
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SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
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SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
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SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
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4, 9, 1, wm8940_lim_thresh_tlv),
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SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
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0, 12, 0, wm8940_lim_boost_tlv),
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SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
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SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
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0, 63, 0, wm8940_pga_vol_tlv),
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SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
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0, 255, 0, wm8940_adc_tlv),
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SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
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0, 255, 0, wm8940_adc_tlv),
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SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
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SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
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8, 1, 0, wm8940_capture_boost_vol_tlv),
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SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
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0, 63, 0, wm8940_spk_vol_tlv),
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SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
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SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
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8, 1, 1, wm8940_att_tlv),
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SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
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SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
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SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
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7, 1, 1, wm8940_att_tlv),
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SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
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SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
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SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
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SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
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SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
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SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
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SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
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};
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static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
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SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
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SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
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SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
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};
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static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
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SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
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SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
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SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
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};
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static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
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static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
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SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
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SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
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0, 7, 0, wm8940_boost_vol_tlv),
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SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
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4, 7, 0, wm8940_boost_vol_tlv),
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};
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static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
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SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
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SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
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SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
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};
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static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
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SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
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&wm8940_speaker_mixer_controls[0],
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ARRAY_SIZE(wm8940_speaker_mixer_controls)),
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SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
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&wm8940_mono_mixer_controls[0],
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ARRAY_SIZE(wm8940_mono_mixer_controls)),
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SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
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SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
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SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
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SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
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SND_SOC_DAPM_OUTPUT("MONOOUT"),
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SND_SOC_DAPM_OUTPUT("SPKOUTP"),
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SND_SOC_DAPM_OUTPUT("SPKOUTN"),
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SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
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SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
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SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
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&wm8940_micpga_controls[0],
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ARRAY_SIZE(wm8940_micpga_controls)),
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SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
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&wm8940_input_boost_controls[0],
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ARRAY_SIZE(wm8940_input_boost_controls)),
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SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
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SND_SOC_DAPM_INPUT("MICN"),
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SND_SOC_DAPM_INPUT("MICP"),
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SND_SOC_DAPM_INPUT("AUX"),
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};
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static const struct snd_soc_dapm_route wm8940_dapm_routes[] = {
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/* Mono output mixer */
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{"Mono Mixer", "PCM Playback Switch", "DAC"},
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{"Mono Mixer", "Aux Playback Switch", "Aux Input"},
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{"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
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/* Speaker output mixer */
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{"Speaker Mixer", "PCM Playback Switch", "DAC"},
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{"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
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{"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
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/* Outputs */
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{"Mono Out", NULL, "Mono Mixer"},
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{"MONOOUT", NULL, "Mono Out"},
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{"SpkN Out", NULL, "Speaker Mixer"},
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{"SpkP Out", NULL, "Speaker Mixer"},
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{"SPKOUTN", NULL, "SpkN Out"},
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{"SPKOUTP", NULL, "SpkP Out"},
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/* Microphone PGA */
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{"Mic PGA", "MICN Switch", "MICN"},
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{"Mic PGA", "MICP Switch", "MICP"},
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{"Mic PGA", "AUX Switch", "AUX"},
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/* Boost Mixer */
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{"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
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{"Boost Mixer", "Mic Volume", "MICP"},
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{"Boost Mixer", "Aux Volume", "Aux Input"},
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{"ADC", NULL, "Boost Mixer"},
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};
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#define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
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static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
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unsigned int fmt)
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{
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struct snd_soc_codec *codec = codec_dai->codec;
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u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
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u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBM_CFM:
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clk |= 1;
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break;
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case SND_SOC_DAIFMT_CBS_CFS:
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break;
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default:
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return -EINVAL;
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}
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snd_soc_write(codec, WM8940_CLOCK, clk);
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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iface |= (2 << 3);
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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iface |= (1 << 3);
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break;
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case SND_SOC_DAIFMT_RIGHT_J:
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break;
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case SND_SOC_DAIFMT_DSP_A:
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iface |= (3 << 3);
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break;
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case SND_SOC_DAIFMT_DSP_B:
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iface |= (3 << 3) | (1 << 7);
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break;
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}
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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break;
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case SND_SOC_DAIFMT_NB_IF:
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iface |= (1 << 7);
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break;
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case SND_SOC_DAIFMT_IB_NF:
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iface |= (1 << 8);
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break;
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case SND_SOC_DAIFMT_IB_IF:
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iface |= (1 << 8) | (1 << 7);
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break;
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}
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snd_soc_write(codec, WM8940_IFACE, iface);
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return 0;
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}
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static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
|
|
u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
|
|
u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
|
|
u16 companding = snd_soc_read(codec,
|
|
WM8940_COMPANDINGCTL) & 0xFFDF;
|
|
int ret;
|
|
|
|
/* LoutR control */
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
|
|
&& params_channels(params) == 2)
|
|
iface |= (1 << 9);
|
|
|
|
switch (params_rate(params)) {
|
|
case 8000:
|
|
addcntrl |= (0x5 << 1);
|
|
break;
|
|
case 11025:
|
|
addcntrl |= (0x4 << 1);
|
|
break;
|
|
case 16000:
|
|
addcntrl |= (0x3 << 1);
|
|
break;
|
|
case 22050:
|
|
addcntrl |= (0x2 << 1);
|
|
break;
|
|
case 32000:
|
|
addcntrl |= (0x1 << 1);
|
|
break;
|
|
case 44100:
|
|
case 48000:
|
|
break;
|
|
}
|
|
ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
|
|
if (ret)
|
|
goto error_ret;
|
|
|
|
switch (params_width(params)) {
|
|
case 8:
|
|
companding = companding | (1 << 5);
|
|
break;
|
|
case 16:
|
|
break;
|
|
case 20:
|
|
iface |= (1 << 5);
|
|
break;
|
|
case 24:
|
|
iface |= (2 << 5);
|
|
break;
|
|
case 32:
|
|
iface |= (3 << 5);
|
|
break;
|
|
}
|
|
ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
|
|
if (ret)
|
|
goto error_ret;
|
|
ret = snd_soc_write(codec, WM8940_IFACE, iface);
|
|
|
|
error_ret:
|
|
return ret;
|
|
}
|
|
|
|
static int wm8940_mute(struct snd_soc_dai *dai, int mute)
|
|
{
|
|
struct snd_soc_codec *codec = dai->codec;
|
|
u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
|
|
|
|
if (mute)
|
|
mute_reg |= 0x40;
|
|
|
|
return snd_soc_write(codec, WM8940_DAC, mute_reg);
|
|
}
|
|
|
|
static int wm8940_set_bias_level(struct snd_soc_codec *codec,
|
|
enum snd_soc_bias_level level)
|
|
{
|
|
struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
|
|
u16 val;
|
|
u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
|
|
int ret = 0;
|
|
|
|
switch (level) {
|
|
case SND_SOC_BIAS_ON:
|
|
/* ensure bufioen and biasen */
|
|
pwr_reg |= (1 << 2) | (1 << 3);
|
|
/* Enable thermal shutdown */
|
|
val = snd_soc_read(codec, WM8940_OUTPUTCTL);
|
|
ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
|
|
if (ret)
|
|
break;
|
|
/* set vmid to 75k */
|
|
ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
|
|
break;
|
|
case SND_SOC_BIAS_PREPARE:
|
|
/* ensure bufioen and biasen */
|
|
pwr_reg |= (1 << 2) | (1 << 3);
|
|
ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
|
|
break;
|
|
case SND_SOC_BIAS_STANDBY:
|
|
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
|
|
ret = regcache_sync(wm8940->regmap);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "Failed to sync cache: %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* ensure bufioen and biasen */
|
|
pwr_reg |= (1 << 2) | (1 << 3);
|
|
/* set vmid to 300k for standby */
|
|
ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
|
|
break;
|
|
case SND_SOC_BIAS_OFF:
|
|
ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
|
|
break;
|
|
}
|
|
|
|
codec->dapm.bias_level = level;
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct pll_ {
|
|
unsigned int pre_scale:2;
|
|
unsigned int n:4;
|
|
unsigned int k;
|
|
};
|
|
|
|
static struct pll_ pll_div;
|
|
|
|
/* The size in bits of the pll divide multiplied by 10
|
|
* to allow rounding later */
|
|
#define FIXED_PLL_SIZE ((1 << 24) * 10)
|
|
static void pll_factors(unsigned int target, unsigned int source)
|
|
{
|
|
unsigned long long Kpart;
|
|
unsigned int K, Ndiv, Nmod;
|
|
/* The left shift ist to avoid accuracy loss when right shifting */
|
|
Ndiv = target / source;
|
|
|
|
if (Ndiv > 12) {
|
|
source <<= 1;
|
|
/* Multiply by 2 */
|
|
pll_div.pre_scale = 0;
|
|
Ndiv = target / source;
|
|
} else if (Ndiv < 3) {
|
|
source >>= 2;
|
|
/* Divide by 4 */
|
|
pll_div.pre_scale = 3;
|
|
Ndiv = target / source;
|
|
} else if (Ndiv < 6) {
|
|
source >>= 1;
|
|
/* divide by 2 */
|
|
pll_div.pre_scale = 2;
|
|
Ndiv = target / source;
|
|
} else
|
|
pll_div.pre_scale = 1;
|
|
|
|
if ((Ndiv < 6) || (Ndiv > 12))
|
|
printk(KERN_WARNING
|
|
"WM8940 N value %d outwith recommended range!d\n",
|
|
Ndiv);
|
|
|
|
pll_div.n = Ndiv;
|
|
Nmod = target % source;
|
|
Kpart = FIXED_PLL_SIZE * (long long)Nmod;
|
|
|
|
do_div(Kpart, source);
|
|
|
|
K = Kpart & 0xFFFFFFFF;
|
|
|
|
/* Check if we need to round */
|
|
if ((K % 10) >= 5)
|
|
K += 5;
|
|
|
|
/* Move down to proper range now rounding is done */
|
|
K /= 10;
|
|
|
|
pll_div.k = K;
|
|
}
|
|
|
|
/* Untested at the moment */
|
|
static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
|
|
int source, unsigned int freq_in, unsigned int freq_out)
|
|
{
|
|
struct snd_soc_codec *codec = codec_dai->codec;
|
|
u16 reg;
|
|
|
|
/* Turn off PLL */
|
|
reg = snd_soc_read(codec, WM8940_POWER1);
|
|
snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
|
|
|
|
if (freq_in == 0 || freq_out == 0) {
|
|
/* Clock CODEC directly from MCLK */
|
|
reg = snd_soc_read(codec, WM8940_CLOCK);
|
|
snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
|
|
/* Pll power down */
|
|
snd_soc_write(codec, WM8940_PLLN, (1 << 7));
|
|
return 0;
|
|
}
|
|
|
|
/* Pll is followed by a frequency divide by 4 */
|
|
pll_factors(freq_out*4, freq_in);
|
|
if (pll_div.k)
|
|
snd_soc_write(codec, WM8940_PLLN,
|
|
(pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
|
|
else /* No factional component */
|
|
snd_soc_write(codec, WM8940_PLLN,
|
|
(pll_div.pre_scale << 4) | pll_div.n);
|
|
snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
|
|
snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
|
|
snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
|
|
/* Enable the PLL */
|
|
reg = snd_soc_read(codec, WM8940_POWER1);
|
|
snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
|
|
|
|
/* Run CODEC from PLL instead of MCLK */
|
|
reg = snd_soc_read(codec, WM8940_CLOCK);
|
|
snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
|
|
int clk_id, unsigned int freq, int dir)
|
|
{
|
|
struct snd_soc_codec *codec = codec_dai->codec;
|
|
struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
|
|
|
|
switch (freq) {
|
|
case 11289600:
|
|
case 12000000:
|
|
case 12288000:
|
|
case 16934400:
|
|
case 18432000:
|
|
wm8940->sysclk = freq;
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
|
|
int div_id, int div)
|
|
{
|
|
struct snd_soc_codec *codec = codec_dai->codec;
|
|
u16 reg;
|
|
int ret = 0;
|
|
|
|
switch (div_id) {
|
|
case WM8940_BCLKDIV:
|
|
reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFE3;
|
|
ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
|
|
break;
|
|
case WM8940_MCLKDIV:
|
|
reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
|
|
ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
|
|
break;
|
|
case WM8940_OPCLKDIV:
|
|
reg = snd_soc_read(codec, WM8940_GPIO) & 0xFFCF;
|
|
ret = snd_soc_write(codec, WM8940_GPIO, reg | (div << 4));
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
#define WM8940_RATES SNDRV_PCM_RATE_8000_48000
|
|
|
|
#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
|
|
SNDRV_PCM_FMTBIT_S16_LE | \
|
|
SNDRV_PCM_FMTBIT_S20_3LE | \
|
|
SNDRV_PCM_FMTBIT_S24_LE | \
|
|
SNDRV_PCM_FMTBIT_S32_LE)
|
|
|
|
static const struct snd_soc_dai_ops wm8940_dai_ops = {
|
|
.hw_params = wm8940_i2s_hw_params,
|
|
.set_sysclk = wm8940_set_dai_sysclk,
|
|
.digital_mute = wm8940_mute,
|
|
.set_fmt = wm8940_set_dai_fmt,
|
|
.set_clkdiv = wm8940_set_dai_clkdiv,
|
|
.set_pll = wm8940_set_dai_pll,
|
|
};
|
|
|
|
static struct snd_soc_dai_driver wm8940_dai = {
|
|
.name = "wm8940-hifi",
|
|
.playback = {
|
|
.stream_name = "Playback",
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = WM8940_RATES,
|
|
.formats = WM8940_FORMATS,
|
|
},
|
|
.capture = {
|
|
.stream_name = "Capture",
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rates = WM8940_RATES,
|
|
.formats = WM8940_FORMATS,
|
|
},
|
|
.ops = &wm8940_dai_ops,
|
|
.symmetric_rates = 1,
|
|
};
|
|
|
|
static int wm8940_suspend(struct snd_soc_codec *codec)
|
|
{
|
|
return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
|
|
}
|
|
|
|
static int wm8940_resume(struct snd_soc_codec *codec)
|
|
{
|
|
wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
|
|
return 0;
|
|
}
|
|
|
|
static int wm8940_probe(struct snd_soc_codec *codec)
|
|
{
|
|
struct wm8940_setup_data *pdata = codec->dev->platform_data;
|
|
int ret;
|
|
u16 reg;
|
|
|
|
ret = wm8940_reset(codec);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "Failed to issue reset\n");
|
|
return ret;
|
|
}
|
|
|
|
wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
|
|
|
|
ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (!pdata)
|
|
dev_warn(codec->dev, "No platform data supplied\n");
|
|
else {
|
|
reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
|
|
ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int wm8940_remove(struct snd_soc_codec *codec)
|
|
{
|
|
wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
|
|
.probe = wm8940_probe,
|
|
.remove = wm8940_remove,
|
|
.suspend = wm8940_suspend,
|
|
.resume = wm8940_resume,
|
|
.set_bias_level = wm8940_set_bias_level,
|
|
.controls = wm8940_snd_controls,
|
|
.num_controls = ARRAY_SIZE(wm8940_snd_controls),
|
|
.dapm_widgets = wm8940_dapm_widgets,
|
|
.num_dapm_widgets = ARRAY_SIZE(wm8940_dapm_widgets),
|
|
.dapm_routes = wm8940_dapm_routes,
|
|
.num_dapm_routes = ARRAY_SIZE(wm8940_dapm_routes),
|
|
};
|
|
|
|
static const struct regmap_config wm8940_regmap = {
|
|
.reg_bits = 8,
|
|
.val_bits = 16,
|
|
|
|
.max_register = WM8940_MONOMIX,
|
|
.reg_defaults = wm8940_reg_defaults,
|
|
.num_reg_defaults = ARRAY_SIZE(wm8940_reg_defaults),
|
|
|
|
.readable_reg = wm8940_readable_register,
|
|
.volatile_reg = wm8940_volatile_register,
|
|
};
|
|
|
|
static int wm8940_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct wm8940_priv *wm8940;
|
|
int ret;
|
|
|
|
wm8940 = devm_kzalloc(&i2c->dev, sizeof(struct wm8940_priv),
|
|
GFP_KERNEL);
|
|
if (wm8940 == NULL)
|
|
return -ENOMEM;
|
|
|
|
wm8940->regmap = devm_regmap_init_i2c(i2c, &wm8940_regmap);
|
|
if (IS_ERR(wm8940->regmap))
|
|
return PTR_ERR(wm8940->regmap);
|
|
|
|
i2c_set_clientdata(i2c, wm8940);
|
|
|
|
ret = snd_soc_register_codec(&i2c->dev,
|
|
&soc_codec_dev_wm8940, &wm8940_dai, 1);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int wm8940_i2c_remove(struct i2c_client *client)
|
|
{
|
|
snd_soc_unregister_codec(&client->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id wm8940_i2c_id[] = {
|
|
{ "wm8940", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
|
|
|
|
static struct i2c_driver wm8940_i2c_driver = {
|
|
.driver = {
|
|
.name = "wm8940",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = wm8940_i2c_probe,
|
|
.remove = wm8940_i2c_remove,
|
|
.id_table = wm8940_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(wm8940_i2c_driver);
|
|
|
|
MODULE_DESCRIPTION("ASoC WM8940 driver");
|
|
MODULE_AUTHOR("Jonathan Cameron");
|
|
MODULE_LICENSE("GPL");
|