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1120 lines
27 KiB
1120 lines
27 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC |
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* |
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* Copyright (C) 2006-2007 Atmel Norway |
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*/ |
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|
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/*#define DEBUG*/ |
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|
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#include <linux/clk.h> |
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#include <linux/err.h> |
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#include <linux/delay.h> |
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#include <linux/device.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/module.h> |
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#include <linux/mutex.h> |
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#include <linux/platform_device.h> |
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#include <linux/io.h> |
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|
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#include <sound/initval.h> |
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#include <sound/control.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <linux/atmel-ssc.h> |
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#include <linux/spi/spi.h> |
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#include <linux/spi/at73c213.h> |
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#include "at73c213.h" |
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#define BITRATE_MIN 8000 /* Hardware limit? */ |
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#define BITRATE_TARGET CONFIG_SND_AT73C213_TARGET_BITRATE |
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#define BITRATE_MAX 50000 /* Hardware limit. */ |
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/* Initial (hardware reset) AT73C213 register values. */ |
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static const u8 snd_at73c213_original_image[18] = |
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{ |
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0x00, /* 00 - CTRL */ |
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0x05, /* 01 - LLIG */ |
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0x05, /* 02 - RLIG */ |
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0x08, /* 03 - LPMG */ |
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0x08, /* 04 - RPMG */ |
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0x00, /* 05 - LLOG */ |
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0x00, /* 06 - RLOG */ |
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0x22, /* 07 - OLC */ |
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0x09, /* 08 - MC */ |
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0x00, /* 09 - CSFC */ |
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0x00, /* 0A - MISC */ |
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0x00, /* 0B - */ |
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0x00, /* 0C - PRECH */ |
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0x05, /* 0D - AUXG */ |
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0x00, /* 0E - */ |
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0x00, /* 0F - */ |
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0x00, /* 10 - RST */ |
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0x00, /* 11 - PA_CTRL */ |
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}; |
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struct snd_at73c213 { |
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struct snd_card *card; |
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struct snd_pcm *pcm; |
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struct snd_pcm_substream *substream; |
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struct at73c213_board_info *board; |
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int irq; |
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int period; |
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unsigned long bitrate; |
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struct ssc_device *ssc; |
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struct spi_device *spi; |
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u8 spi_wbuffer[2]; |
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u8 spi_rbuffer[2]; |
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/* Image of the SPI registers in AT73C213. */ |
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u8 reg_image[18]; |
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/* Protect SSC registers against concurrent access. */ |
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spinlock_t lock; |
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/* Protect mixer registers against concurrent access. */ |
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struct mutex mixer_lock; |
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}; |
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#define get_chip(card) ((struct snd_at73c213 *)card->private_data) |
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static int |
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snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val) |
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{ |
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struct spi_message msg; |
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struct spi_transfer msg_xfer = { |
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.len = 2, |
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.cs_change = 0, |
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}; |
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int retval; |
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spi_message_init(&msg); |
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chip->spi_wbuffer[0] = reg; |
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chip->spi_wbuffer[1] = val; |
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msg_xfer.tx_buf = chip->spi_wbuffer; |
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msg_xfer.rx_buf = chip->spi_rbuffer; |
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spi_message_add_tail(&msg_xfer, &msg); |
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retval = spi_sync(chip->spi, &msg); |
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if (!retval) |
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chip->reg_image[reg] = val; |
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return retval; |
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} |
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static struct snd_pcm_hardware snd_at73c213_playback_hw = { |
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.info = SNDRV_PCM_INFO_INTERLEAVED | |
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SNDRV_PCM_INFO_BLOCK_TRANSFER, |
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.formats = SNDRV_PCM_FMTBIT_S16_BE, |
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.rates = SNDRV_PCM_RATE_CONTINUOUS, |
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.rate_min = 8000, /* Replaced by chip->bitrate later. */ |
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.rate_max = 50000, /* Replaced by chip->bitrate later. */ |
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.channels_min = 1, |
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.channels_max = 2, |
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.buffer_bytes_max = 64 * 1024 - 1, |
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.period_bytes_min = 512, |
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.period_bytes_max = 64 * 1024 - 1, |
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.periods_min = 4, |
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.periods_max = 1024, |
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}; |
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|
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/* |
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* Calculate and set bitrate and divisions. |
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*/ |
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static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip) |
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{ |
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unsigned long ssc_rate = clk_get_rate(chip->ssc->clk); |
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unsigned long dac_rate_new, ssc_div; |
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int status; |
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unsigned long ssc_div_max, ssc_div_min; |
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int max_tries; |
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|
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/* |
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* We connect two clocks here, picking divisors so the I2S clocks |
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* out data at the same rate the DAC clocks it in ... and as close |
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* as practical to the desired target rate. |
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* |
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* The DAC master clock (MCLK) is programmable, and is either 256 |
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* or (not here) 384 times the I2S output clock (BCLK). |
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*/ |
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|
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/* SSC clock / (bitrate * stereo * 16-bit). */ |
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ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16); |
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ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16); |
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ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16); |
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max_tries = (ssc_div_max - ssc_div_min) / 2; |
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if (max_tries < 1) |
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max_tries = 1; |
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|
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/* ssc_div must be even. */ |
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ssc_div = (ssc_div + 1) & ~1UL; |
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if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) { |
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ssc_div -= 2; |
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if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX) |
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return -ENXIO; |
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} |
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|
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/* Search for a possible bitrate. */ |
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do { |
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/* SSC clock / (ssc divider * 16-bit * stereo). */ |
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if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) |
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return -ENXIO; |
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|
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/* 256 / (2 * 16) = 8 */ |
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dac_rate_new = 8 * (ssc_rate / ssc_div); |
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|
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status = clk_round_rate(chip->board->dac_clk, dac_rate_new); |
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if (status <= 0) |
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return status; |
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|
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/* Ignore difference smaller than 256 Hz. */ |
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if ((status/256) == (dac_rate_new/256)) |
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goto set_rate; |
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ssc_div += 2; |
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} while (--max_tries); |
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/* Not able to find a valid bitrate. */ |
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return -ENXIO; |
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set_rate: |
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status = clk_set_rate(chip->board->dac_clk, status); |
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if (status < 0) |
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return status; |
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/* Set divider in SSC device. */ |
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ssc_writel(chip->ssc->regs, CMR, ssc_div/2); |
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/* SSC clock / (ssc divider * 16-bit * stereo). */ |
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chip->bitrate = ssc_rate / (ssc_div * 16 * 2); |
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dev_info(&chip->spi->dev, |
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"at73c213: supported bitrate is %lu (%lu divider)\n", |
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chip->bitrate, ssc_div); |
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return 0; |
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} |
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static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream) |
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{ |
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struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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int err; |
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|
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/* ensure buffer_size is a multiple of period_size */ |
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err = snd_pcm_hw_constraint_integer(runtime, |
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SNDRV_PCM_HW_PARAM_PERIODS); |
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if (err < 0) |
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return err; |
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snd_at73c213_playback_hw.rate_min = chip->bitrate; |
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snd_at73c213_playback_hw.rate_max = chip->bitrate; |
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runtime->hw = snd_at73c213_playback_hw; |
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chip->substream = substream; |
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clk_enable(chip->ssc->clk); |
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return 0; |
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} |
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static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream) |
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{ |
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struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
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chip->substream = NULL; |
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clk_disable(chip->ssc->clk); |
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return 0; |
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} |
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static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *hw_params) |
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{ |
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struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
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int channels = params_channels(hw_params); |
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int val; |
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val = ssc_readl(chip->ssc->regs, TFMR); |
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val = SSC_BFINS(TFMR_DATNB, channels - 1, val); |
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ssc_writel(chip->ssc->regs, TFMR, val); |
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return 0; |
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} |
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static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream) |
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{ |
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struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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int block_size; |
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block_size = frames_to_bytes(runtime, runtime->period_size); |
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chip->period = 0; |
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ssc_writel(chip->ssc->regs, PDC_TPR, |
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(long)runtime->dma_addr); |
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ssc_writel(chip->ssc->regs, PDC_TCR, |
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runtime->period_size * runtime->channels); |
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ssc_writel(chip->ssc->regs, PDC_TNPR, |
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(long)runtime->dma_addr + block_size); |
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ssc_writel(chip->ssc->regs, PDC_TNCR, |
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runtime->period_size * runtime->channels); |
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return 0; |
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} |
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static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream, |
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int cmd) |
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{ |
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struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
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int retval = 0; |
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spin_lock(&chip->lock); |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX)); |
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ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN)); |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS)); |
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ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX)); |
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break; |
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default: |
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dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd); |
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retval = -EINVAL; |
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break; |
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} |
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spin_unlock(&chip->lock); |
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return retval; |
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} |
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static snd_pcm_uframes_t |
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snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream) |
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{ |
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struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
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struct snd_pcm_runtime *runtime = substream->runtime; |
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snd_pcm_uframes_t pos; |
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unsigned long bytes; |
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bytes = ssc_readl(chip->ssc->regs, PDC_TPR) |
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- (unsigned long)runtime->dma_addr; |
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pos = bytes_to_frames(runtime, bytes); |
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if (pos >= runtime->buffer_size) |
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pos -= runtime->buffer_size; |
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return pos; |
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} |
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static const struct snd_pcm_ops at73c213_playback_ops = { |
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.open = snd_at73c213_pcm_open, |
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.close = snd_at73c213_pcm_close, |
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.hw_params = snd_at73c213_pcm_hw_params, |
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.prepare = snd_at73c213_pcm_prepare, |
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.trigger = snd_at73c213_pcm_trigger, |
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.pointer = snd_at73c213_pcm_pointer, |
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}; |
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static int snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device) |
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{ |
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struct snd_pcm *pcm; |
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int retval; |
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retval = snd_pcm_new(chip->card, chip->card->shortname, |
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device, 1, 0, &pcm); |
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if (retval < 0) |
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goto out; |
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pcm->private_data = chip; |
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pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER; |
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strcpy(pcm->name, "at73c213"); |
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chip->pcm = pcm; |
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops); |
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snd_pcm_set_managed_buffer_all(chip->pcm, |
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SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev, |
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64 * 1024, 64 * 1024); |
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out: |
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return retval; |
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} |
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static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id) |
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{ |
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struct snd_at73c213 *chip = dev_id; |
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struct snd_pcm_runtime *runtime = chip->substream->runtime; |
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u32 status; |
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int offset; |
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int block_size; |
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int next_period; |
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int retval = IRQ_NONE; |
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spin_lock(&chip->lock); |
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block_size = frames_to_bytes(runtime, runtime->period_size); |
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status = ssc_readl(chip->ssc->regs, IMR); |
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if (status & SSC_BIT(IMR_ENDTX)) { |
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chip->period++; |
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if (chip->period == runtime->periods) |
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chip->period = 0; |
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next_period = chip->period + 1; |
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if (next_period == runtime->periods) |
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next_period = 0; |
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offset = block_size * next_period; |
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ssc_writel(chip->ssc->regs, PDC_TNPR, |
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(long)runtime->dma_addr + offset); |
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ssc_writel(chip->ssc->regs, PDC_TNCR, |
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runtime->period_size * runtime->channels); |
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retval = IRQ_HANDLED; |
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} |
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ssc_readl(chip->ssc->regs, IMR); |
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spin_unlock(&chip->lock); |
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|
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if (status & SSC_BIT(IMR_ENDTX)) |
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snd_pcm_period_elapsed(chip->substream); |
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return retval; |
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} |
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|
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/* |
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* Mixer functions. |
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*/ |
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static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
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int reg = kcontrol->private_value & 0xff; |
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int shift = (kcontrol->private_value >> 8) & 0xff; |
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int mask = (kcontrol->private_value >> 16) & 0xff; |
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int invert = (kcontrol->private_value >> 24) & 0xff; |
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|
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mutex_lock(&chip->mixer_lock); |
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|
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ucontrol->value.integer.value[0] = |
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(chip->reg_image[reg] >> shift) & mask; |
|
|
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if (invert) |
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ucontrol->value.integer.value[0] = |
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mask - ucontrol->value.integer.value[0]; |
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|
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mutex_unlock(&chip->mixer_lock); |
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|
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return 0; |
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} |
|
|
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static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
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int reg = kcontrol->private_value & 0xff; |
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int shift = (kcontrol->private_value >> 8) & 0xff; |
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int mask = (kcontrol->private_value >> 16) & 0xff; |
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int invert = (kcontrol->private_value >> 24) & 0xff; |
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int change, retval; |
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unsigned short val; |
|
|
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val = (ucontrol->value.integer.value[0] & mask); |
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if (invert) |
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val = mask - val; |
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val <<= shift; |
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|
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mutex_lock(&chip->mixer_lock); |
|
|
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val = (chip->reg_image[reg] & ~(mask << shift)) | val; |
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change = val != chip->reg_image[reg]; |
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retval = snd_at73c213_write_reg(chip, reg, val); |
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|
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mutex_unlock(&chip->mixer_lock); |
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|
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if (retval) |
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return retval; |
|
|
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return change; |
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} |
|
|
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static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_info *uinfo) |
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{ |
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int mask = (kcontrol->private_value >> 24) & 0xff; |
|
|
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if (mask == 1) |
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uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; |
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else |
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
|
|
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uinfo->count = 2; |
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uinfo->value.integer.min = 0; |
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uinfo->value.integer.max = mask; |
|
|
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return 0; |
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} |
|
|
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static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
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int left_reg = kcontrol->private_value & 0xff; |
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int right_reg = (kcontrol->private_value >> 8) & 0xff; |
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int shift_left = (kcontrol->private_value >> 16) & 0x07; |
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int shift_right = (kcontrol->private_value >> 19) & 0x07; |
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int mask = (kcontrol->private_value >> 24) & 0xff; |
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int invert = (kcontrol->private_value >> 22) & 1; |
|
|
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mutex_lock(&chip->mixer_lock); |
|
|
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ucontrol->value.integer.value[0] = |
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(chip->reg_image[left_reg] >> shift_left) & mask; |
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ucontrol->value.integer.value[1] = |
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(chip->reg_image[right_reg] >> shift_right) & mask; |
|
|
|
if (invert) { |
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ucontrol->value.integer.value[0] = |
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mask - ucontrol->value.integer.value[0]; |
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ucontrol->value.integer.value[1] = |
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mask - ucontrol->value.integer.value[1]; |
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} |
|
|
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mutex_unlock(&chip->mixer_lock); |
|
|
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return 0; |
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} |
|
|
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static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *ucontrol) |
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{ |
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struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
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int left_reg = kcontrol->private_value & 0xff; |
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int right_reg = (kcontrol->private_value >> 8) & 0xff; |
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int shift_left = (kcontrol->private_value >> 16) & 0x07; |
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int shift_right = (kcontrol->private_value >> 19) & 0x07; |
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int mask = (kcontrol->private_value >> 24) & 0xff; |
|
int invert = (kcontrol->private_value >> 22) & 1; |
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int change, retval; |
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unsigned short val1, val2; |
|
|
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val1 = ucontrol->value.integer.value[0] & mask; |
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val2 = ucontrol->value.integer.value[1] & mask; |
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if (invert) { |
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val1 = mask - val1; |
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val2 = mask - val2; |
|
} |
|
val1 <<= shift_left; |
|
val2 <<= shift_right; |
|
|
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mutex_lock(&chip->mixer_lock); |
|
|
|
val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1; |
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val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2; |
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change = val1 != chip->reg_image[left_reg] |
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|| val2 != chip->reg_image[right_reg]; |
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retval = snd_at73c213_write_reg(chip, left_reg, val1); |
|
if (retval) { |
|
mutex_unlock(&chip->mixer_lock); |
|
goto out; |
|
} |
|
retval = snd_at73c213_write_reg(chip, right_reg, val2); |
|
if (retval) { |
|
mutex_unlock(&chip->mixer_lock); |
|
goto out; |
|
} |
|
|
|
mutex_unlock(&chip->mixer_lock); |
|
|
|
return change; |
|
|
|
out: |
|
return retval; |
|
} |
|
|
|
#define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info |
|
|
|
static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol, |
|
struct snd_ctl_elem_value *ucontrol) |
|
{ |
|
struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
|
int reg = kcontrol->private_value & 0xff; |
|
int shift = (kcontrol->private_value >> 8) & 0xff; |
|
int invert = (kcontrol->private_value >> 24) & 0xff; |
|
|
|
mutex_lock(&chip->mixer_lock); |
|
|
|
ucontrol->value.integer.value[0] = |
|
(chip->reg_image[reg] >> shift) & 0x01; |
|
|
|
if (invert) |
|
ucontrol->value.integer.value[0] = |
|
0x01 - ucontrol->value.integer.value[0]; |
|
|
|
mutex_unlock(&chip->mixer_lock); |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol, |
|
struct snd_ctl_elem_value *ucontrol) |
|
{ |
|
struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
|
int reg = kcontrol->private_value & 0xff; |
|
int shift = (kcontrol->private_value >> 8) & 0xff; |
|
int mask = (kcontrol->private_value >> 16) & 0xff; |
|
int invert = (kcontrol->private_value >> 24) & 0xff; |
|
int change, retval; |
|
unsigned short val; |
|
|
|
if (ucontrol->value.integer.value[0]) |
|
val = mask; |
|
else |
|
val = 0; |
|
|
|
if (invert) |
|
val = mask - val; |
|
val <<= shift; |
|
|
|
mutex_lock(&chip->mixer_lock); |
|
|
|
val |= (chip->reg_image[reg] & ~(mask << shift)); |
|
change = val != chip->reg_image[reg]; |
|
|
|
retval = snd_at73c213_write_reg(chip, reg, val); |
|
|
|
mutex_unlock(&chip->mixer_lock); |
|
|
|
if (retval) |
|
return retval; |
|
|
|
return change; |
|
} |
|
|
|
static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol, |
|
struct snd_ctl_elem_info *uinfo) |
|
{ |
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
|
uinfo->count = 1; |
|
uinfo->value.integer.min = 0; |
|
uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1; |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_at73c213_line_capture_volume_info( |
|
struct snd_kcontrol *kcontrol, |
|
struct snd_ctl_elem_info *uinfo) |
|
{ |
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
|
uinfo->count = 2; |
|
/* When inverted will give values 0x10001 => 0. */ |
|
uinfo->value.integer.min = 14; |
|
uinfo->value.integer.max = 31; |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_at73c213_aux_capture_volume_info( |
|
struct snd_kcontrol *kcontrol, |
|
struct snd_ctl_elem_info *uinfo) |
|
{ |
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
|
uinfo->count = 1; |
|
/* When inverted will give values 0x10001 => 0. */ |
|
uinfo->value.integer.min = 14; |
|
uinfo->value.integer.max = 31; |
|
|
|
return 0; |
|
} |
|
|
|
#define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \ |
|
{ \ |
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ |
|
.name = xname, \ |
|
.index = xindex, \ |
|
.info = snd_at73c213_mono_switch_info, \ |
|
.get = snd_at73c213_mono_switch_get, \ |
|
.put = snd_at73c213_mono_switch_put, \ |
|
.private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \ |
|
} |
|
|
|
#define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \ |
|
{ \ |
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ |
|
.name = xname, \ |
|
.index = xindex, \ |
|
.info = snd_at73c213_stereo_info, \ |
|
.get = snd_at73c213_stereo_get, \ |
|
.put = snd_at73c213_stereo_put, \ |
|
.private_value = (left_reg | (right_reg << 8) \ |
|
| (shift_left << 16) | (shift_right << 19) \ |
|
| (mask << 24) | (invert << 22)) \ |
|
} |
|
|
|
static const struct snd_kcontrol_new snd_at73c213_controls[] = { |
|
AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1), |
|
AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1), |
|
AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1), |
|
AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1), |
|
AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV, |
|
0x01, 0), |
|
{ |
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
|
.name = "PA Playback Volume", |
|
.index = 0, |
|
.info = snd_at73c213_pa_volume_info, |
|
.get = snd_at73c213_mono_get, |
|
.put = snd_at73c213_mono_put, |
|
.private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \ |
|
(0x0f << 16) | (1 << 24), |
|
}, |
|
AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP, |
|
0x01, 1), |
|
AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0), |
|
{ |
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
|
.name = "Aux Capture Volume", |
|
.index = 0, |
|
.info = snd_at73c213_aux_capture_volume_info, |
|
.get = snd_at73c213_mono_get, |
|
.put = snd_at73c213_mono_put, |
|
.private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24), |
|
}, |
|
AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN, |
|
0x01, 0), |
|
{ |
|
.iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
|
.name = "Line Capture Volume", |
|
.index = 0, |
|
.info = snd_at73c213_line_capture_volume_info, |
|
.get = snd_at73c213_stereo_get, |
|
.put = snd_at73c213_stereo_put, |
|
.private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19) |
|
| (0x1f << 24) | (1 << 22), |
|
}, |
|
AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0), |
|
}; |
|
|
|
static int snd_at73c213_mixer(struct snd_at73c213 *chip) |
|
{ |
|
struct snd_card *card; |
|
int errval, idx; |
|
|
|
if (chip == NULL || chip->pcm == NULL) |
|
return -EINVAL; |
|
|
|
card = chip->card; |
|
|
|
strcpy(card->mixername, chip->pcm->name); |
|
|
|
for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) { |
|
errval = snd_ctl_add(card, |
|
snd_ctl_new1(&snd_at73c213_controls[idx], |
|
chip)); |
|
if (errval < 0) |
|
goto cleanup; |
|
} |
|
|
|
return 0; |
|
|
|
cleanup: |
|
for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) { |
|
struct snd_kcontrol *kctl; |
|
kctl = snd_ctl_find_numid(card, idx); |
|
if (kctl) |
|
snd_ctl_remove(card, kctl); |
|
} |
|
return errval; |
|
} |
|
|
|
/* |
|
* Device functions |
|
*/ |
|
static int snd_at73c213_ssc_init(struct snd_at73c213 *chip) |
|
{ |
|
/* |
|
* Continuous clock output. |
|
* Starts on falling TF. |
|
* Delay 1 cycle (1 bit). |
|
* Periode is 16 bit (16 - 1). |
|
*/ |
|
ssc_writel(chip->ssc->regs, TCMR, |
|
SSC_BF(TCMR_CKO, 1) |
|
| SSC_BF(TCMR_START, 4) |
|
| SSC_BF(TCMR_STTDLY, 1) |
|
| SSC_BF(TCMR_PERIOD, 16 - 1)); |
|
/* |
|
* Data length is 16 bit (16 - 1). |
|
* Transmit MSB first. |
|
* Transmit 2 words each transfer. |
|
* Frame sync length is 16 bit (16 - 1). |
|
* Frame starts on negative pulse. |
|
*/ |
|
ssc_writel(chip->ssc->regs, TFMR, |
|
SSC_BF(TFMR_DATLEN, 16 - 1) |
|
| SSC_BIT(TFMR_MSBF) |
|
| SSC_BF(TFMR_DATNB, 1) |
|
| SSC_BF(TFMR_FSLEN, 16 - 1) |
|
| SSC_BF(TFMR_FSOS, 1)); |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_at73c213_chip_init(struct snd_at73c213 *chip) |
|
{ |
|
int retval; |
|
unsigned char dac_ctrl = 0; |
|
|
|
retval = snd_at73c213_set_bitrate(chip); |
|
if (retval) |
|
goto out; |
|
|
|
/* Enable DAC master clock. */ |
|
clk_enable(chip->board->dac_clk); |
|
|
|
/* Initialize at73c213 on SPI bus. */ |
|
retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04); |
|
if (retval) |
|
goto out_clk; |
|
msleep(1); |
|
retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03); |
|
if (retval) |
|
goto out_clk; |
|
|
|
/* Precharge everything. */ |
|
retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff); |
|
if (retval) |
|
goto out_clk; |
|
retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH)); |
|
if (retval) |
|
goto out_clk; |
|
retval = snd_at73c213_write_reg(chip, DAC_CTRL, |
|
(1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR)); |
|
if (retval) |
|
goto out_clk; |
|
|
|
msleep(50); |
|
|
|
/* Stop precharging PA. */ |
|
retval = snd_at73c213_write_reg(chip, PA_CTRL, |
|
(1<<PA_CTRL_APALP) | 0x0f); |
|
if (retval) |
|
goto out_clk; |
|
|
|
msleep(450); |
|
|
|
/* Stop precharging DAC, turn on master power. */ |
|
retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR)); |
|
if (retval) |
|
goto out_clk; |
|
|
|
msleep(1); |
|
|
|
/* Turn on DAC. */ |
|
dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR) |
|
| (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR); |
|
|
|
retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl); |
|
if (retval) |
|
goto out_clk; |
|
|
|
/* Mute sound. */ |
|
retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f); |
|
if (retval) |
|
goto out_clk; |
|
retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f); |
|
if (retval) |
|
goto out_clk; |
|
retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f); |
|
if (retval) |
|
goto out_clk; |
|
retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f); |
|
if (retval) |
|
goto out_clk; |
|
retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11); |
|
if (retval) |
|
goto out_clk; |
|
retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11); |
|
if (retval) |
|
goto out_clk; |
|
retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11); |
|
if (retval) |
|
goto out_clk; |
|
|
|
/* Enable I2S device, i.e. clock output. */ |
|
ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN)); |
|
|
|
goto out; |
|
|
|
out_clk: |
|
clk_disable(chip->board->dac_clk); |
|
out: |
|
return retval; |
|
} |
|
|
|
static int snd_at73c213_dev_free(struct snd_device *device) |
|
{ |
|
struct snd_at73c213 *chip = device->device_data; |
|
|
|
ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); |
|
if (chip->irq >= 0) { |
|
free_irq(chip->irq, chip); |
|
chip->irq = -1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_at73c213_dev_init(struct snd_card *card, |
|
struct spi_device *spi) |
|
{ |
|
static const struct snd_device_ops ops = { |
|
.dev_free = snd_at73c213_dev_free, |
|
}; |
|
struct snd_at73c213 *chip = get_chip(card); |
|
int irq, retval; |
|
|
|
irq = chip->ssc->irq; |
|
if (irq < 0) |
|
return irq; |
|
|
|
spin_lock_init(&chip->lock); |
|
mutex_init(&chip->mixer_lock); |
|
chip->card = card; |
|
chip->irq = -1; |
|
|
|
clk_enable(chip->ssc->clk); |
|
|
|
retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip); |
|
if (retval) { |
|
dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq); |
|
goto out; |
|
} |
|
chip->irq = irq; |
|
|
|
memcpy(&chip->reg_image, &snd_at73c213_original_image, |
|
sizeof(snd_at73c213_original_image)); |
|
|
|
retval = snd_at73c213_ssc_init(chip); |
|
if (retval) |
|
goto out_irq; |
|
|
|
retval = snd_at73c213_chip_init(chip); |
|
if (retval) |
|
goto out_irq; |
|
|
|
retval = snd_at73c213_pcm_new(chip, 0); |
|
if (retval) |
|
goto out_irq; |
|
|
|
retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); |
|
if (retval) |
|
goto out_irq; |
|
|
|
retval = snd_at73c213_mixer(chip); |
|
if (retval) |
|
goto out_snd_dev; |
|
|
|
goto out; |
|
|
|
out_snd_dev: |
|
snd_device_free(card, chip); |
|
out_irq: |
|
free_irq(chip->irq, chip); |
|
chip->irq = -1; |
|
out: |
|
clk_disable(chip->ssc->clk); |
|
|
|
return retval; |
|
} |
|
|
|
static int snd_at73c213_probe(struct spi_device *spi) |
|
{ |
|
struct snd_card *card; |
|
struct snd_at73c213 *chip; |
|
struct at73c213_board_info *board; |
|
int retval; |
|
char id[16]; |
|
|
|
board = spi->dev.platform_data; |
|
if (!board) { |
|
dev_dbg(&spi->dev, "no platform_data\n"); |
|
return -ENXIO; |
|
} |
|
|
|
if (!board->dac_clk) { |
|
dev_dbg(&spi->dev, "no DAC clk\n"); |
|
return -ENXIO; |
|
} |
|
|
|
if (IS_ERR(board->dac_clk)) { |
|
dev_dbg(&spi->dev, "no DAC clk\n"); |
|
return PTR_ERR(board->dac_clk); |
|
} |
|
|
|
/* Allocate "card" using some unused identifiers. */ |
|
snprintf(id, sizeof id, "at73c213_%d", board->ssc_id); |
|
retval = snd_card_new(&spi->dev, -1, id, THIS_MODULE, |
|
sizeof(struct snd_at73c213), &card); |
|
if (retval < 0) |
|
goto out; |
|
|
|
chip = card->private_data; |
|
chip->spi = spi; |
|
chip->board = board; |
|
|
|
chip->ssc = ssc_request(board->ssc_id); |
|
if (IS_ERR(chip->ssc)) { |
|
dev_dbg(&spi->dev, "could not get ssc%d device\n", |
|
board->ssc_id); |
|
retval = PTR_ERR(chip->ssc); |
|
goto out_card; |
|
} |
|
|
|
retval = snd_at73c213_dev_init(card, spi); |
|
if (retval) |
|
goto out_ssc; |
|
|
|
strcpy(card->driver, "at73c213"); |
|
strcpy(card->shortname, board->shortname); |
|
sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq); |
|
|
|
retval = snd_card_register(card); |
|
if (retval) |
|
goto out_ssc; |
|
|
|
dev_set_drvdata(&spi->dev, card); |
|
|
|
goto out; |
|
|
|
out_ssc: |
|
ssc_free(chip->ssc); |
|
out_card: |
|
snd_card_free(card); |
|
out: |
|
return retval; |
|
} |
|
|
|
static int snd_at73c213_remove(struct spi_device *spi) |
|
{ |
|
struct snd_card *card = dev_get_drvdata(&spi->dev); |
|
struct snd_at73c213 *chip = card->private_data; |
|
int retval; |
|
|
|
/* Stop playback. */ |
|
clk_enable(chip->ssc->clk); |
|
ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); |
|
clk_disable(chip->ssc->clk); |
|
|
|
/* Mute sound. */ |
|
retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f); |
|
if (retval) |
|
goto out; |
|
retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f); |
|
if (retval) |
|
goto out; |
|
retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f); |
|
if (retval) |
|
goto out; |
|
retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f); |
|
if (retval) |
|
goto out; |
|
retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11); |
|
if (retval) |
|
goto out; |
|
retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11); |
|
if (retval) |
|
goto out; |
|
retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11); |
|
if (retval) |
|
goto out; |
|
|
|
/* Turn off PA. */ |
|
retval = snd_at73c213_write_reg(chip, PA_CTRL, |
|
chip->reg_image[PA_CTRL] | 0x0f); |
|
if (retval) |
|
goto out; |
|
msleep(10); |
|
retval = snd_at73c213_write_reg(chip, PA_CTRL, |
|
(1 << PA_CTRL_APALP) | 0x0f); |
|
if (retval) |
|
goto out; |
|
|
|
/* Turn off external DAC. */ |
|
retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c); |
|
if (retval) |
|
goto out; |
|
msleep(2); |
|
retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00); |
|
if (retval) |
|
goto out; |
|
|
|
/* Turn off master power. */ |
|
retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00); |
|
if (retval) |
|
goto out; |
|
|
|
out: |
|
/* Stop DAC master clock. */ |
|
clk_disable(chip->board->dac_clk); |
|
|
|
ssc_free(chip->ssc); |
|
snd_card_free(card); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
|
|
static int snd_at73c213_suspend(struct device *dev) |
|
{ |
|
struct snd_card *card = dev_get_drvdata(dev); |
|
struct snd_at73c213 *chip = card->private_data; |
|
|
|
ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); |
|
clk_disable(chip->ssc->clk); |
|
clk_disable(chip->board->dac_clk); |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_at73c213_resume(struct device *dev) |
|
{ |
|
struct snd_card *card = dev_get_drvdata(dev); |
|
struct snd_at73c213 *chip = card->private_data; |
|
|
|
clk_enable(chip->board->dac_clk); |
|
clk_enable(chip->ssc->clk); |
|
ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN)); |
|
|
|
return 0; |
|
} |
|
|
|
static SIMPLE_DEV_PM_OPS(at73c213_pm_ops, snd_at73c213_suspend, |
|
snd_at73c213_resume); |
|
#define AT73C213_PM_OPS (&at73c213_pm_ops) |
|
|
|
#else |
|
#define AT73C213_PM_OPS NULL |
|
#endif |
|
|
|
static struct spi_driver at73c213_driver = { |
|
.driver = { |
|
.name = "at73c213", |
|
.pm = AT73C213_PM_OPS, |
|
}, |
|
.probe = snd_at73c213_probe, |
|
.remove = snd_at73c213_remove, |
|
}; |
|
|
|
module_spi_driver(at73c213_driver); |
|
|
|
MODULE_AUTHOR("Hans-Christian Egtvedt <[email protected]>"); |
|
MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC"); |
|
MODULE_LICENSE("GPL");
|
|
|