--- /dev/null
+/*
+ * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
+ *
+ * Copyright (C) 2006-2007 Atmel Norway
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+/*#define DEBUG*/
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <sound/driver.h>
+#include <sound/initval.h>
+#include <sound/control.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+
+#include <linux/atmel-ssc.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/at73c213.h>
+
+#include "at73c213.h"
+
+#define BITRATE_MIN 8000 /* Hardware limit? */
+#define BITRATE_TARGET CONFIG_SND_AT73C213_TARGET_BITRATE
+#define BITRATE_MAX 50000 /* Hardware limit. */
+
+/* Initial (hardware reset) AT73C213 register values. */
+static u8 snd_at73c213_original_image[18] =
+{
+ 0x00, /* 00 - CTRL */
+ 0x05, /* 01 - LLIG */
+ 0x05, /* 02 - RLIG */
+ 0x08, /* 03 - LPMG */
+ 0x08, /* 04 - RPMG */
+ 0x00, /* 05 - LLOG */
+ 0x00, /* 06 - RLOG */
+ 0x22, /* 07 - OLC */
+ 0x09, /* 08 - MC */
+ 0x00, /* 09 - CSFC */
+ 0x00, /* 0A - MISC */
+ 0x00, /* 0B - */
+ 0x00, /* 0C - PRECH */
+ 0x05, /* 0D - AUXG */
+ 0x00, /* 0E - */
+ 0x00, /* 0F - */
+ 0x00, /* 10 - RST */
+ 0x00, /* 11 - PA_CTRL */
+};
+
+struct snd_at73c213 {
+ struct snd_card *card;
+ struct snd_pcm *pcm;
+ struct snd_pcm_substream *substream;
+ struct at73c213_board_info *board;
+ int irq;
+ int period;
+ unsigned long bitrate;
+ struct clk *bitclk;
+ struct ssc_device *ssc;
+ struct spi_device *spi;
+ u8 spi_wbuffer[2];
+ u8 spi_rbuffer[2];
+ /* Image of the SPI registers in AT73C213. */
+ u8 reg_image[18];
+ /* Protect registers against concurrent access. */
+ spinlock_t lock;
+};
+
+#define get_chip(card) ((struct snd_at73c213 *)card->private_data)
+
+static int
+snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val)
+{
+ struct spi_message msg;
+ struct spi_transfer msg_xfer = {
+ .len = 2,
+ .cs_change = 0,
+ };
+ int retval;
+
+ spi_message_init(&msg);
+
+ chip->spi_wbuffer[0] = reg;
+ chip->spi_wbuffer[1] = val;
+
+ msg_xfer.tx_buf = chip->spi_wbuffer;
+ msg_xfer.rx_buf = chip->spi_rbuffer;
+ spi_message_add_tail(&msg_xfer, &msg);
+
+ retval = spi_sync(chip->spi, &msg);
+
+ if (!retval)
+ chip->reg_image[reg] = val;
+
+ return retval;
+}
+
+static struct snd_pcm_hardware snd_at73c213_playback_hw = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER,
+ .formats = SNDRV_PCM_FMTBIT_S16_BE,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 8000, /* Replaced by chip->bitrate later. */
+ .rate_max = 50000, /* Replaced by chip->bitrate later. */
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = 64 * 1024 - 1,
+ .period_bytes_min = 512,
+ .period_bytes_max = 64 * 1024 - 1,
+ .periods_min = 4,
+ .periods_max = 1024,
+};
+
+/*
+ * Calculate and set bitrate and divisions.
+ */
+static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip)
+{
+ unsigned long ssc_rate = clk_get_rate(chip->ssc->clk);
+ unsigned long dac_rate_new, ssc_div, status;
+ unsigned long ssc_div_max, ssc_div_min;
+ int max_tries;
+
+ /*
+ * We connect two clocks here, picking divisors so the I2S clocks
+ * out data at the same rate the DAC clocks it in ... and as close
+ * as practical to the desired target rate.
+ *
+ * The DAC master clock (MCLK) is programmable, and is either 256
+ * or (not here) 384 times the I2S output clock (BCLK).
+ */
+
+ /* SSC clock / (bitrate * stereo * 16-bit). */
+ ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16);
+ ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16);
+ ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16);
+ max_tries = (ssc_div_max - ssc_div_min) / 2;
+
+ if (max_tries < 1)
+ max_tries = 1;
+
+ /* ssc_div must be a power of 2. */
+ ssc_div = (ssc_div + 1) & ~1UL;
+
+ if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) {
+ ssc_div -= 2;
+ if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX)
+ return -ENXIO;
+ }
+
+ /* Search for a possible bitrate. */
+ do {
+ /* SSC clock / (ssc divider * 16-bit * stereo). */
+ if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN)
+ return -ENXIO;
+
+ /* 256 / (2 * 16) = 8 */
+ dac_rate_new = 8 * (ssc_rate / ssc_div);
+
+ status = clk_round_rate(chip->board->dac_clk, dac_rate_new);
+ if (status < 0)
+ return status;
+
+ /* Ignore difference smaller than 256 Hz. */
+ if ((status/256) == (dac_rate_new/256))
+ goto set_rate;
+
+ ssc_div += 2;
+ } while (--max_tries);
+
+ /* Not able to find a valid bitrate. */
+ return -ENXIO;
+
+set_rate:
+ status = clk_set_rate(chip->board->dac_clk, status);
+ if (status < 0)
+ return status;
+
+ /* Set divider in SSC device. */
+ ssc_writel(chip->ssc->regs, CMR, ssc_div/2);
+
+ /* SSC clock / (ssc divider * 16-bit * stereo). */
+ chip->bitrate = ssc_rate / (ssc_div * 16 * 2);
+
+ dev_info(&chip->spi->dev,
+ "at73c213: supported bitrate is %lu (%lu divider)\n",
+ chip->bitrate, ssc_div);
+
+ return 0;
+}
+
+static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ snd_at73c213_playback_hw.rate_min = chip->bitrate;
+ snd_at73c213_playback_hw.rate_max = chip->bitrate;
+ runtime->hw = snd_at73c213_playback_hw;
+ chip->substream = substream;
+
+ return 0;
+}
+
+static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+ chip->substream = NULL;
+ return 0;
+}
+
+static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ return snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
+}
+
+static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int block_size;
+
+ block_size = frames_to_bytes(runtime, runtime->period_size);
+
+ chip->period = 0;
+
+ ssc_writel(chip->ssc->regs, PDC_TPR,
+ (long)runtime->dma_addr);
+ ssc_writel(chip->ssc->regs, PDC_TCR, runtime->period_size * 2);
+ ssc_writel(chip->ssc->regs, PDC_TNPR,
+ (long)runtime->dma_addr + block_size);
+ ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2);
+
+ return 0;
+}
+
+static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+ int retval = 0;
+
+ spin_lock(&chip->lock);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX));
+ ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN));
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS));
+ ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX));
+ break;
+ default:
+ dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd);
+ retval = -EINVAL;
+ break;
+ }
+
+ spin_unlock(&chip->lock);
+
+ return retval;
+}
+
+static snd_pcm_uframes_t
+snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_uframes_t pos;
+ unsigned long bytes;
+
+ bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
+ - (unsigned long)runtime->dma_addr;
+
+ pos = bytes_to_frames(runtime, bytes);
+ if (pos >= runtime->buffer_size)
+ pos -= runtime->buffer_size;
+
+ return pos;
+}
+
+static struct snd_pcm_ops at73c213_playback_ops = {
+ .open = snd_at73c213_pcm_open,
+ .close = snd_at73c213_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_at73c213_pcm_hw_params,
+ .hw_free = snd_at73c213_pcm_hw_free,
+ .prepare = snd_at73c213_pcm_prepare,
+ .trigger = snd_at73c213_pcm_trigger,
+ .pointer = snd_at73c213_pcm_pointer,
+};
+
+static void snd_at73c213_pcm_free(struct snd_pcm *pcm)
+{
+ struct snd_at73c213 *chip = snd_pcm_chip(pcm);
+ if (chip->pcm) {
+ snd_pcm_lib_preallocate_free_for_all(chip->pcm);
+ chip->pcm = NULL;
+ }
+}
+
+static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
+{
+ struct snd_pcm *pcm;
+ int retval;
+
+ retval = snd_pcm_new(chip->card, chip->card->shortname,
+ device, 1, 0, &pcm);
+ if (retval < 0)
+ goto out;
+
+ pcm->private_data = chip;
+ pcm->private_free = snd_at73c213_pcm_free;
+ pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
+ strcpy(pcm->name, "at73c213");
+ chip->pcm = pcm;
+
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
+
+ retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
+ SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
+ 64 * 1024, 64 * 1024);
+out:
+ return retval;
+}
+
+static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id)
+{
+ struct snd_at73c213 *chip = dev_id;
+ struct snd_pcm_runtime *runtime = chip->substream->runtime;
+ u32 status;
+ int offset;
+ int block_size;
+ int next_period;
+ int retval = IRQ_NONE;
+
+ spin_lock(&chip->lock);
+
+ block_size = frames_to_bytes(runtime, runtime->period_size);
+ status = ssc_readl(chip->ssc->regs, IMR);
+
+ if (status & SSC_BIT(IMR_ENDTX)) {
+ chip->period++;
+ if (chip->period == runtime->periods)
+ chip->period = 0;
+ next_period = chip->period + 1;
+ if (next_period == runtime->periods)
+ next_period = 0;
+
+ offset = block_size * next_period;
+
+ ssc_writel(chip->ssc->regs, PDC_TNPR,
+ (long)runtime->dma_addr + offset);
+ ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2);
+ retval = IRQ_HANDLED;
+ }
+
+ ssc_readl(chip->ssc->regs, IMR);
+ spin_unlock(&chip->lock);
+
+ if (status & SSC_BIT(IMR_ENDTX))
+ snd_pcm_period_elapsed(chip->substream);
+
+ return retval;
+}
+
+/*
+ * Mixer functions.
+ */
+static int snd_at73c213_mono_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 mask = (kcontrol->private_value >> 16) & 0xff;
+ int invert = (kcontrol->private_value >> 24) & 0xff;
+
+ spin_lock_irq(&chip->lock);
+
+ ucontrol->value.integer.value[0] =
+ (chip->reg_image[reg] >> shift) & mask;
+
+ if (invert)
+ ucontrol->value.integer.value[0] =
+ mask - ucontrol->value.integer.value[0];
+
+ spin_unlock_irq(&chip->lock);
+
+ return 0;
+}
+
+static int snd_at73c213_mono_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;
+
+ val = (ucontrol->value.integer.value[0] & mask);
+ if (invert)
+ val = mask - val;
+ val <<= shift;
+
+ spin_lock_irq(&chip->lock);
+
+ val = (chip->reg_image[reg] & ~(mask << shift)) | val;
+ change = val != chip->reg_image[reg];
+ retval = snd_at73c213_write_reg(chip, reg, val);
+
+ spin_unlock_irq(&chip->lock);
+
+ if (retval)
+ return retval;
+
+ return change;
+}
+
+static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ int mask = (kcontrol->private_value >> 24) & 0xff;
+
+ if (mask == 1)
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+ else
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+
+ uinfo->count = 2;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = mask;
+
+ return 0;
+}
+
+static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+ int left_reg = kcontrol->private_value & 0xff;
+ int right_reg = (kcontrol->private_value >> 8) & 0xff;
+ int shift_left = (kcontrol->private_value >> 16) & 0x07;
+ int shift_right = (kcontrol->private_value >> 19) & 0x07;
+ int mask = (kcontrol->private_value >> 24) & 0xff;
+ int invert = (kcontrol->private_value >> 22) & 1;
+
+ spin_lock_irq(&chip->lock);
+
+ ucontrol->value.integer.value[0] =
+ (chip->reg_image[left_reg] >> shift_left) & mask;
+ ucontrol->value.integer.value[1] =
+ (chip->reg_image[right_reg] >> shift_right) & mask;
+
+ if (invert) {
+ ucontrol->value.integer.value[0] =
+ mask - ucontrol->value.integer.value[0];
+ ucontrol->value.integer.value[1] =
+ mask - ucontrol->value.integer.value[1];
+ }
+
+ spin_unlock_irq(&chip->lock);
+
+ return 0;
+}
+
+static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+ int left_reg = kcontrol->private_value & 0xff;
+ int right_reg = (kcontrol->private_value >> 8) & 0xff;
+ int shift_left = (kcontrol->private_value >> 16) & 0x07;
+ int shift_right = (kcontrol->private_value >> 19) & 0x07;
+ int mask = (kcontrol->private_value >> 24) & 0xff;
+ int invert = (kcontrol->private_value >> 22) & 1;
+ int change, retval;
+ unsigned short val1, val2;
+
+ val1 = ucontrol->value.integer.value[0] & mask;
+ val2 = ucontrol->value.integer.value[1] & mask;
+ if (invert) {
+ val1 = mask - val1;
+ val2 = mask - val2;
+ }
+ val1 <<= shift_left;
+ val2 <<= shift_right;
+
+ spin_lock_irq(&chip->lock);
+
+ val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
+ val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
+ change = val1 != chip->reg_image[left_reg]
+ || val2 != chip->reg_image[right_reg];
+ retval = snd_at73c213_write_reg(chip, left_reg, val1);
+ if (retval) {
+ spin_unlock_irq(&chip->lock);
+ goto out;
+ }
+ retval = snd_at73c213_write_reg(chip, right_reg, val2);
+ if (retval) {
+ spin_unlock_irq(&chip->lock);
+ goto out;
+ }
+
+ spin_unlock_irq(&chip->lock);
+
+ return change;
+
+out:
+ return retval;
+}
+
+static int snd_at73c213_mono_switch_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 1;
+
+ return 0;
+}
+
+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;
+
+ spin_lock_irq(&chip->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];
+
+ spin_unlock_irq(&chip->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;
+
+ spin_lock_irq(&chip->lock);
+
+ val |= (chip->reg_image[reg] & ~(mask << shift));
+ change = val != chip->reg_image[reg];
+
+ retval = snd_at73c213_write_reg(chip, reg, val);
+
+ spin_unlock_irq(&chip->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 struct snd_kcontrol_new snd_at73c213_controls[] __devinitdata = {
+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 __devinit 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 __devinit snd_at73c213_dev_init(struct snd_card *card,
+ struct spi_device *spi)
+{
+ static 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);
+ chip->card = card;
+ chip->irq = -1;
+
+ 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;
+
+ snd_card_set_dev(card, &spi->dev);
+
+ goto out;
+
+out_snd_dev:
+ snd_device_free(card, chip);
+out_irq:
+ free_irq(chip->irq, chip);
+ chip->irq = -1;
+out:
+ 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);
+ }
+
+ retval = -ENOMEM;
+
+ /* Allocate "card" using some unused identifiers. */
+ snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
+ card = snd_card_new(-1, id, THIS_MODULE, sizeof(struct snd_at73c213));
+ if (!card)
+ 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 __devexit 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. */
+ ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+
+ /* 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);
+ dev_set_drvdata(&spi->dev, NULL);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int snd_at73c213_suspend(struct spi_device *spi, pm_message_t msg)
+{
+ struct snd_card *card = dev_get_drvdata(&spi->dev);
+ struct snd_at73c213 *chip = card->private_data;
+
+ ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+ clk_disable(chip->board->dac_clk);
+
+ return 0;
+}
+
+static int snd_at73c213_resume(struct spi_device *spi)
+{
+ struct snd_card *card = dev_get_drvdata(&spi->dev);
+ struct snd_at73c213 *chip = card->private_data;
+
+ clk_enable(chip->board->dac_clk);
+ ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
+
+ return 0;
+}
+#else
+#define snd_at73c213_suspend NULL
+#define snd_at73c213_resume NULL
+#endif
+
+static struct spi_driver at73c213_driver = {
+ .driver = {
+ .name = "at73c213",
+ },
+ .probe = snd_at73c213_probe,
+ .suspend = snd_at73c213_suspend,
+ .resume = snd_at73c213_resume,
+ .remove = __devexit_p(snd_at73c213_remove),
+};
+
+static int __init at73c213_init(void)
+{
+ return spi_register_driver(&at73c213_driver);
+}
+module_init(at73c213_init);
+
+static void __exit at73c213_exit(void)
+{
+ spi_unregister_driver(&at73c213_driver);
+}
+module_exit(at73c213_exit);
+
+MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
+MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
+MODULE_LICENSE("GPL");
projects / openwrt / staging / blogic.git / commitdiff