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Diffstat (limited to 'sound/soc/at91/at91-ssc.c')
-rw-r--r--sound/soc/at91/at91-ssc.c791
1 files changed, 0 insertions, 791 deletions
diff --git a/sound/soc/at91/at91-ssc.c b/sound/soc/at91/at91-ssc.c
deleted file mode 100644
index 1b61cc46126..00000000000
--- a/sound/soc/at91/at91-ssc.c
+++ /dev/null
@@ -1,791 +0,0 @@
-/*
- * at91-ssc.c -- ALSA SoC AT91 SSC Audio Layer Platform driver
- *
- * Author: Frank Mandarino <fmandarino@endrelia.com>
- * Endrelia Technologies Inc.
- *
- * Based on pxa2xx Platform drivers by
- * Liam Girdwood <lrg@slimlogic.co.uk>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/delay.h>
-#include <linux/clk.h>
-#include <linux/atmel_pdc.h>
-
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/initval.h>
-#include <sound/soc.h>
-
-#include <mach/hardware.h>
-#include <mach/at91_pmc.h>
-#include <mach/at91_ssc.h>
-
-#include "at91-pcm.h"
-#include "at91-ssc.h"
-
-#if 0
-#define DBG(x...) printk(KERN_DEBUG "at91-ssc:" x)
-#else
-#define DBG(x...)
-#endif
-
-#if defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20)
-#define NUM_SSC_DEVICES 1
-#else
-#define NUM_SSC_DEVICES 3
-#endif
-
-
-/*
- * SSC PDC registers required by the PCM DMA engine.
- */
-static struct at91_pdc_regs pdc_tx_reg = {
- .xpr = ATMEL_PDC_TPR,
- .xcr = ATMEL_PDC_TCR,
- .xnpr = ATMEL_PDC_TNPR,
- .xncr = ATMEL_PDC_TNCR,
-};
-
-static struct at91_pdc_regs pdc_rx_reg = {
- .xpr = ATMEL_PDC_RPR,
- .xcr = ATMEL_PDC_RCR,
- .xnpr = ATMEL_PDC_RNPR,
- .xncr = ATMEL_PDC_RNCR,
-};
-
-/*
- * SSC & PDC status bits for transmit and receive.
- */
-static struct at91_ssc_mask ssc_tx_mask = {
- .ssc_enable = AT91_SSC_TXEN,
- .ssc_disable = AT91_SSC_TXDIS,
- .ssc_endx = AT91_SSC_ENDTX,
- .ssc_endbuf = AT91_SSC_TXBUFE,
- .pdc_enable = ATMEL_PDC_TXTEN,
- .pdc_disable = ATMEL_PDC_TXTDIS,
-};
-
-static struct at91_ssc_mask ssc_rx_mask = {
- .ssc_enable = AT91_SSC_RXEN,
- .ssc_disable = AT91_SSC_RXDIS,
- .ssc_endx = AT91_SSC_ENDRX,
- .ssc_endbuf = AT91_SSC_RXBUFF,
- .pdc_enable = ATMEL_PDC_RXTEN,
- .pdc_disable = ATMEL_PDC_RXTDIS,
-};
-
-
-/*
- * DMA parameters.
- */
-static struct at91_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
- {{
- .name = "SSC0 PCM out",
- .pdc = &pdc_tx_reg,
- .mask = &ssc_tx_mask,
- },
- {
- .name = "SSC0 PCM in",
- .pdc = &pdc_rx_reg,
- .mask = &ssc_rx_mask,
- }},
-#if NUM_SSC_DEVICES == 3
- {{
- .name = "SSC1 PCM out",
- .pdc = &pdc_tx_reg,
- .mask = &ssc_tx_mask,
- },
- {
- .name = "SSC1 PCM in",
- .pdc = &pdc_rx_reg,
- .mask = &ssc_rx_mask,
- }},
- {{
- .name = "SSC2 PCM out",
- .pdc = &pdc_tx_reg,
- .mask = &ssc_tx_mask,
- },
- {
- .name = "SSC2 PCM in",
- .pdc = &pdc_rx_reg,
- .mask = &ssc_rx_mask,
- }},
-#endif
-};
-
-struct at91_ssc_state {
- u32 ssc_cmr;
- u32 ssc_rcmr;
- u32 ssc_rfmr;
- u32 ssc_tcmr;
- u32 ssc_tfmr;
- u32 ssc_sr;
- u32 ssc_imr;
-};
-
-static struct at91_ssc_info {
- char *name;
- struct at91_ssc_periph ssc;
- spinlock_t lock; /* lock for dir_mask */
- unsigned short dir_mask; /* 0=unused, 1=playback, 2=capture */
- unsigned short initialized; /* 1=SSC has been initialized */
- unsigned short daifmt;
- unsigned short cmr_div;
- unsigned short tcmr_period;
- unsigned short rcmr_period;
- struct at91_pcm_dma_params *dma_params[2];
- struct at91_ssc_state ssc_state;
-
-} ssc_info[NUM_SSC_DEVICES] = {
- {
- .name = "ssc0",
- .lock = __SPIN_LOCK_UNLOCKED(ssc_info[0].lock),
- .dir_mask = 0,
- .initialized = 0,
- },
-#if NUM_SSC_DEVICES == 3
- {
- .name = "ssc1",
- .lock = __SPIN_LOCK_UNLOCKED(ssc_info[1].lock),
- .dir_mask = 0,
- .initialized = 0,
- },
- {
- .name = "ssc2",
- .lock = __SPIN_LOCK_UNLOCKED(ssc_info[2].lock),
- .dir_mask = 0,
- .initialized = 0,
- },
-#endif
-};
-
-static unsigned int at91_ssc_sysclk;
-
-/*
- * SSC interrupt handler. Passes PDC interrupts to the DMA
- * interrupt handler in the PCM driver.
- */
-static irqreturn_t at91_ssc_interrupt(int irq, void *dev_id)
-{
- struct at91_ssc_info *ssc_p = dev_id;
- struct at91_pcm_dma_params *dma_params;
- u32 ssc_sr;
- int i;
-
- ssc_sr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR)
- & at91_ssc_read(ssc_p->ssc.base + AT91_SSC_IMR);
-
- /*
- * Loop through the substreams attached to this SSC. If
- * a DMA-related interrupt occurred on that substream, call
- * the DMA interrupt handler function, if one has been
- * registered in the dma_params structure by the PCM driver.
- */
- for (i = 0; i < ARRAY_SIZE(ssc_p->dma_params); i++) {
- dma_params = ssc_p->dma_params[i];
-
- if (dma_params != NULL && dma_params->dma_intr_handler != NULL &&
- (ssc_sr &
- (dma_params->mask->ssc_endx | dma_params->mask->ssc_endbuf)))
-
- dma_params->dma_intr_handler(ssc_sr, dma_params->substream);
- }
-
- return IRQ_HANDLED;
-}
-
-/*
- * Startup. Only that one substream allowed in each direction.
- */
-static int at91_ssc_startup(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
- int dir_mask;
-
- DBG("ssc_startup: SSC_SR=0x%08lx\n",
- at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR));
- dir_mask = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0x1 : 0x2;
-
- spin_lock_irq(&ssc_p->lock);
- if (ssc_p->dir_mask & dir_mask) {
- spin_unlock_irq(&ssc_p->lock);
- return -EBUSY;
- }
- ssc_p->dir_mask |= dir_mask;
- spin_unlock_irq(&ssc_p->lock);
-
- return 0;
-}
-
-/*
- * Shutdown. Clear DMA parameters and shutdown the SSC if there
- * are no other substreams open.
- */
-static void at91_ssc_shutdown(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
- struct at91_pcm_dma_params *dma_params;
- int dir, dir_mask;
-
- dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
- dma_params = ssc_p->dma_params[dir];
-
- if (dma_params != NULL) {
- at91_ssc_write(dma_params->ssc_base + AT91_SSC_CR,
- dma_params->mask->ssc_disable);
- DBG("%s disabled SSC_SR=0x%08lx\n", (dir ? "receive" : "transmit"),
- at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR));
-
- dma_params->ssc_base = NULL;
- dma_params->substream = NULL;
- ssc_p->dma_params[dir] = NULL;
- }
-
- dir_mask = 1 << dir;
-
- spin_lock_irq(&ssc_p->lock);
- ssc_p->dir_mask &= ~dir_mask;
- if (!ssc_p->dir_mask) {
- /* Shutdown the SSC clock. */
- DBG("Stopping pid %d clock\n", ssc_p->ssc.pid);
- at91_sys_write(AT91_PMC_PCDR, 1<<ssc_p->ssc.pid);
-
- if (ssc_p->initialized) {
- free_irq(ssc_p->ssc.pid, ssc_p);
- ssc_p->initialized = 0;
- }
-
- /* Reset the SSC */
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR, AT91_SSC_SWRST);
-
- /* Clear the SSC dividers */
- ssc_p->cmr_div = ssc_p->tcmr_period = ssc_p->rcmr_period = 0;
- }
- spin_unlock_irq(&ssc_p->lock);
-}
-
-/*
- * Record the SSC system clock rate.
- */
-static int at91_ssc_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
- int clk_id, unsigned int freq, int dir)
-{
- /*
- * The only clock supplied to the SSC is the AT91 master clock,
- * which is only used if the SSC is generating BCLK and/or
- * LRC clocks.
- */
- switch (clk_id) {
- case AT91_SYSCLK_MCK:
- at91_ssc_sysclk = freq;
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-/*
- * Record the DAI format for use in hw_params().
- */
-static int at91_ssc_set_dai_fmt(struct snd_soc_dai *cpu_dai,
- unsigned int fmt)
-{
- struct at91_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
-
- ssc_p->daifmt = fmt;
- return 0;
-}
-
-/*
- * Record SSC clock dividers for use in hw_params().
- */
-static int at91_ssc_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
- int div_id, int div)
-{
- struct at91_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
-
- switch (div_id) {
- case AT91SSC_CMR_DIV:
- /*
- * The same master clock divider is used for both
- * transmit and receive, so if a value has already
- * been set, it must match this value.
- */
- if (ssc_p->cmr_div == 0)
- ssc_p->cmr_div = div;
- else
- if (div != ssc_p->cmr_div)
- return -EBUSY;
- break;
-
- case AT91SSC_TCMR_PERIOD:
- ssc_p->tcmr_period = div;
- break;
-
- case AT91SSC_RCMR_PERIOD:
- ssc_p->rcmr_period = div;
- break;
-
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-/*
- * Configure the SSC.
- */
-static int at91_ssc_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- int id = rtd->dai->cpu_dai->id;
- struct at91_ssc_info *ssc_p = &ssc_info[id];
- struct at91_pcm_dma_params *dma_params;
- int dir, channels, bits;
- u32 tfmr, rfmr, tcmr, rcmr;
- int start_event;
- int ret;
-
- /*
- * Currently, there is only one set of dma params for
- * each direction. If more are added, this code will
- * have to be changed to select the proper set.
- */
- dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
-
- dma_params = &ssc_dma_params[id][dir];
- dma_params->ssc_base = ssc_p->ssc.base;
- dma_params->substream = substream;
-
- ssc_p->dma_params[dir] = dma_params;
-
- /*
- * The cpu_dai->dma_data field is only used to communicate the
- * appropriate DMA parameters to the pcm driver hw_params()
- * function. It should not be used for other purposes
- * as it is common to all substreams.
- */
- rtd->dai->cpu_dai->dma_data = dma_params;
-
- channels = params_channels(params);
-
- /*
- * Determine sample size in bits and the PDC increment.
- */
- switch(params_format(params)) {
- case SNDRV_PCM_FORMAT_S8:
- bits = 8;
- dma_params->pdc_xfer_size = 1;
- break;
- case SNDRV_PCM_FORMAT_S16_LE:
- bits = 16;
- dma_params->pdc_xfer_size = 2;
- break;
- case SNDRV_PCM_FORMAT_S24_LE:
- bits = 24;
- dma_params->pdc_xfer_size = 4;
- break;
- case SNDRV_PCM_FORMAT_S32_LE:
- bits = 32;
- dma_params->pdc_xfer_size = 4;
- break;
- default:
- printk(KERN_WARNING "at91-ssc: unsupported PCM format\n");
- return -EINVAL;
- }
-
- /*
- * The SSC only supports up to 16-bit samples in I2S format, due
- * to the size of the Frame Mode Register FSLEN field.
- */
- if ((ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S
- && bits > 16) {
- printk(KERN_WARNING
- "at91-ssc: sample size %d is too large for I2S\n", bits);
- return -EINVAL;
- }
-
- /*
- * Compute SSC register settings.
- */
- switch (ssc_p->daifmt
- & (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_MASTER_MASK)) {
-
- case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS:
- /*
- * I2S format, SSC provides BCLK and LRC clocks.
- *
- * The SSC transmit and receive clocks are generated from the
- * MCK divider, and the BCLK signal is output on the SSC TK line.
- */
- rcmr = (( ssc_p->rcmr_period << 24) & AT91_SSC_PERIOD)
- | (( 1 << 16) & AT91_SSC_STTDLY)
- | (( AT91_SSC_START_FALLING_RF ) & AT91_SSC_START)
- | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
- | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
- | (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
-
- rfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
- | (( AT91_SSC_FSOS_NEGATIVE ) & AT91_SSC_FSOS)
- | (((bits - 1) << 16) & AT91_SSC_FSLEN)
- | (((channels - 1) << 8) & AT91_SSC_DATNB)
- | (( 1 << 7) & AT91_SSC_MSBF)
- | (( 0 << 5) & AT91_SSC_LOOP)
- | (((bits - 1) << 0) & AT91_SSC_DATALEN);
-
- tcmr = (( ssc_p->tcmr_period << 24) & AT91_SSC_PERIOD)
- | (( 1 << 16) & AT91_SSC_STTDLY)
- | (( AT91_SSC_START_FALLING_RF ) & AT91_SSC_START)
- | (( AT91_SSC_CKI_FALLING ) & AT91_SSC_CKI)
- | (( AT91_SSC_CKO_CONTINUOUS ) & AT91_SSC_CKO)
- | (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
-
- tfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
- | (( 0 << 23) & AT91_SSC_FSDEN)
- | (( AT91_SSC_FSOS_NEGATIVE ) & AT91_SSC_FSOS)
- | (((bits - 1) << 16) & AT91_SSC_FSLEN)
- | (((channels - 1) << 8) & AT91_SSC_DATNB)
- | (( 1 << 7) & AT91_SSC_MSBF)
- | (( 0 << 5) & AT91_SSC_DATDEF)
- | (((bits - 1) << 0) & AT91_SSC_DATALEN);
- break;
-
- case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM:
- /*
- * I2S format, CODEC supplies BCLK and LRC clocks.
- *
- * The SSC transmit clock is obtained from the BCLK signal on
- * on the TK line, and the SSC receive clock is generated from the
- * transmit clock.
- *
- * For single channel data, one sample is transferred on the falling
- * edge of the LRC clock. For two channel data, one sample is
- * transferred on both edges of the LRC clock.
- */
- start_event = channels == 1
- ? AT91_SSC_START_FALLING_RF
- : AT91_SSC_START_EDGE_RF;
-
- rcmr = (( 0 << 24) & AT91_SSC_PERIOD)
- | (( 1 << 16) & AT91_SSC_STTDLY)
- | (( start_event ) & AT91_SSC_START)
- | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
- | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
- | (( AT91_SSC_CKS_CLOCK ) & AT91_SSC_CKS);
-
- rfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
- | (( AT91_SSC_FSOS_NONE ) & AT91_SSC_FSOS)
- | (( 0 << 16) & AT91_SSC_FSLEN)
- | (( 0 << 8) & AT91_SSC_DATNB)
- | (( 1 << 7) & AT91_SSC_MSBF)
- | (( 0 << 5) & AT91_SSC_LOOP)
- | (((bits - 1) << 0) & AT91_SSC_DATALEN);
-
- tcmr = (( 0 << 24) & AT91_SSC_PERIOD)
- | (( 1 << 16) & AT91_SSC_STTDLY)
- | (( start_event ) & AT91_SSC_START)
- | (( AT91_SSC_CKI_FALLING ) & AT91_SSC_CKI)
- | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
- | (( AT91_SSC_CKS_PIN ) & AT91_SSC_CKS);
-
- tfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
- | (( 0 << 23) & AT91_SSC_FSDEN)
- | (( AT91_SSC_FSOS_NONE ) & AT91_SSC_FSOS)
- | (( 0 << 16) & AT91_SSC_FSLEN)
- | (( 0 << 8) & AT91_SSC_DATNB)
- | (( 1 << 7) & AT91_SSC_MSBF)
- | (( 0 << 5) & AT91_SSC_DATDEF)
- | (((bits - 1) << 0) & AT91_SSC_DATALEN);
- break;
-
- case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBS_CFS:
- /*
- * DSP/PCM Mode A format, SSC provides BCLK and LRC clocks.
- *
- * The SSC transmit and receive clocks are generated from the
- * MCK divider, and the BCLK signal is output on the SSC TK line.
- */
- rcmr = (( ssc_p->rcmr_period << 24) & AT91_SSC_PERIOD)
- | (( 1 << 16) & AT91_SSC_STTDLY)
- | (( AT91_SSC_START_RISING_RF ) & AT91_SSC_START)
- | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
- | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
- | (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
-
- rfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
- | (( AT91_SSC_FSOS_POSITIVE ) & AT91_SSC_FSOS)
- | (( 0 << 16) & AT91_SSC_FSLEN)
- | (((channels - 1) << 8) & AT91_SSC_DATNB)
- | (( 1 << 7) & AT91_SSC_MSBF)
- | (( 0 << 5) & AT91_SSC_LOOP)
- | (((bits - 1) << 0) & AT91_SSC_DATALEN);
-
- tcmr = (( ssc_p->tcmr_period << 24) & AT91_SSC_PERIOD)
- | (( 1 << 16) & AT91_SSC_STTDLY)
- | (( AT91_SSC_START_RISING_RF ) & AT91_SSC_START)
- | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
- | (( AT91_SSC_CKO_CONTINUOUS ) & AT91_SSC_CKO)
- | (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
-
- tfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
- | (( 0 << 23) & AT91_SSC_FSDEN)
- | (( AT91_SSC_FSOS_POSITIVE ) & AT91_SSC_FSOS)
- | (( 0 << 16) & AT91_SSC_FSLEN)
- | (((channels - 1) << 8) & AT91_SSC_DATNB)
- | (( 1 << 7) & AT91_SSC_MSBF)
- | (( 0 << 5) & AT91_SSC_DATDEF)
- | (((bits - 1) << 0) & AT91_SSC_DATALEN);
-
-
-
- break;
-
- case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBM_CFM:
- default:
- printk(KERN_WARNING "at91-ssc: unsupported DAI format 0x%x.\n",
- ssc_p->daifmt);
- return -EINVAL;
- break;
- }
- DBG("RCMR=%08x RFMR=%08x TCMR=%08x TFMR=%08x\n", rcmr, rfmr, tcmr, tfmr);
-
- if (!ssc_p->initialized) {
-
- /* Enable PMC peripheral clock for this SSC */
- DBG("Starting pid %d clock\n", ssc_p->ssc.pid);
- at91_sys_write(AT91_PMC_PCER, 1<<ssc_p->ssc.pid);
-
- /* Reset the SSC and its PDC registers */
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR, AT91_SSC_SWRST);
-
- at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_RPR, 0);
- at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_RCR, 0);
- at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_RNPR, 0);
- at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_RNCR, 0);
- at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_TPR, 0);
- at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_TCR, 0);
- at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_TNPR, 0);
- at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_TNCR, 0);
-
- if ((ret = request_irq(ssc_p->ssc.pid, at91_ssc_interrupt,
- 0, ssc_p->name, ssc_p)) < 0) {
- printk(KERN_WARNING "at91-ssc: request_irq failure\n");
-
- DBG("Stopping pid %d clock\n", ssc_p->ssc.pid);
- at91_sys_write(AT91_PMC_PCDR, 1<<ssc_p->ssc.pid);
- return ret;
- }
-
- ssc_p->initialized = 1;
- }
-
- /* set SSC clock mode register */
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, ssc_p->cmr_div);
-
- /* set receive clock mode and format */
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, rcmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RFMR, rfmr);
-
- /* set transmit clock mode and format */
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TCMR, tcmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TFMR, tfmr);
-
- DBG("hw_params: SSC initialized\n");
- return 0;
-}
-
-
-static int at91_ssc_prepare(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
- struct at91_pcm_dma_params *dma_params;
- int dir;
-
- dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
- dma_params = ssc_p->dma_params[dir];
-
- at91_ssc_write(dma_params->ssc_base + AT91_SSC_CR,
- dma_params->mask->ssc_enable);
-
- DBG("%s enabled SSC_SR=0x%08lx\n", dir ? "receive" : "transmit",
- at91_ssc_read(dma_params->ssc_base + AT91_SSC_SR));
- return 0;
-}
-
-
-#ifdef CONFIG_PM
-static int at91_ssc_suspend(struct platform_device *pdev,
- struct snd_soc_dai *cpu_dai)
-{
- struct at91_ssc_info *ssc_p;
-
- if(!cpu_dai->active)
- return 0;
-
- ssc_p = &ssc_info[cpu_dai->id];
-
- /* Save the status register before disabling transmit and receive. */
- ssc_p->ssc_state.ssc_sr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR,
- AT91_SSC_TXDIS | AT91_SSC_RXDIS);
-
- /* Save the current interrupt mask, then disable unmasked interrupts. */
- ssc_p->ssc_state.ssc_imr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_IMR);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IDR, ssc_p->ssc_state.ssc_imr);
-
- ssc_p->ssc_state.ssc_cmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_CMR);
- ssc_p->ssc_state.ssc_rcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
- ssc_p->ssc_state.ssc_rfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RFMR);
- ssc_p->ssc_state.ssc_tcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_TCMR);
- ssc_p->ssc_state.ssc_tfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_TFMR);
-
- return 0;
-}
-
-static int at91_ssc_resume(struct platform_device *pdev,
- struct snd_soc_dai *cpu_dai)
-{
- struct at91_ssc_info *ssc_p;
-
- if(!cpu_dai->active)
- return 0;
-
- ssc_p = &ssc_info[cpu_dai->id];
-
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TFMR, ssc_p->ssc_state.ssc_tfmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TCMR, ssc_p->ssc_state.ssc_tcmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RFMR, ssc_p->ssc_state.ssc_rfmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->ssc_state.ssc_rcmr);
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, ssc_p->ssc_state.ssc_cmr);
-
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IER, ssc_p->ssc_state.ssc_imr);
-
- at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR,
- ((ssc_p->ssc_state.ssc_sr & AT91_SSC_RXENA) ? AT91_SSC_RXEN : 0) |
- ((ssc_p->ssc_state.ssc_sr & AT91_SSC_TXENA) ? AT91_SSC_TXEN : 0));
-
- return 0;
-}
-
-#else
-#define at91_ssc_suspend NULL
-#define at91_ssc_resume NULL
-#endif
-
-#define AT91_SSC_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
- SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
- SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
- SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
- SNDRV_PCM_RATE_96000)
-
-#define AT91_SSC_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\
- SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
-
-struct snd_soc_dai at91_ssc_dai[NUM_SSC_DEVICES] = {
- { .name = "at91-ssc0",
- .id = 0,
- .type = SND_SOC_DAI_PCM,
- .suspend = at91_ssc_suspend,
- .resume = at91_ssc_resume,
- .playback = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = AT91_SSC_RATES,
- .formats = AT91_SSC_FORMATS,},
- .capture = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = AT91_SSC_RATES,
- .formats = AT91_SSC_FORMATS,},
- .ops = {
- .startup = at91_ssc_startup,
- .shutdown = at91_ssc_shutdown,
- .prepare = at91_ssc_prepare,
- .hw_params = at91_ssc_hw_params,},
- .dai_ops = {
- .set_sysclk = at91_ssc_set_dai_sysclk,
- .set_fmt = at91_ssc_set_dai_fmt,
- .set_clkdiv = at91_ssc_set_dai_clkdiv,},
- .private_data = &ssc_info[0].ssc,
- },
-#if NUM_SSC_DEVICES == 3
- { .name = "at91-ssc1",
- .id = 1,
- .type = SND_SOC_DAI_PCM,
- .suspend = at91_ssc_suspend,
- .resume = at91_ssc_resume,
- .playback = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = AT91_SSC_RATES,
- .formats = AT91_SSC_FORMATS,},
- .capture = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = AT91_SSC_RATES,
- .formats = AT91_SSC_FORMATS,},
- .ops = {
- .startup = at91_ssc_startup,
- .shutdown = at91_ssc_shutdown,
- .prepare = at91_ssc_prepare,
- .hw_params = at91_ssc_hw_params,},
- .dai_ops = {
- .set_sysclk = at91_ssc_set_dai_sysclk,
- .set_fmt = at91_ssc_set_dai_fmt,
- .set_clkdiv = at91_ssc_set_dai_clkdiv,},
- .private_data = &ssc_info[1].ssc,
- },
- { .name = "at91-ssc2",
- .id = 2,
- .type = SND_SOC_DAI_PCM,
- .suspend = at91_ssc_suspend,
- .resume = at91_ssc_resume,
- .playback = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = AT91_SSC_RATES,
- .formats = AT91_SSC_FORMATS,},
- .capture = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = AT91_SSC_RATES,
- .formats = AT91_SSC_FORMATS,},
- .ops = {
- .startup = at91_ssc_startup,
- .shutdown = at91_ssc_shutdown,
- .prepare = at91_ssc_prepare,
- .hw_params = at91_ssc_hw_params,},
- .dai_ops = {
- .set_sysclk = at91_ssc_set_dai_sysclk,
- .set_fmt = at91_ssc_set_dai_fmt,
- .set_clkdiv = at91_ssc_set_dai_clkdiv,},
- .private_data = &ssc_info[2].ssc,
- },
-#endif
-};
-
-EXPORT_SYMBOL_GPL(at91_ssc_dai);
-
-/* Module information */
-MODULE_AUTHOR("Frank Mandarino, fmandarino@endrelia.com, www.endrelia.com");
-MODULE_DESCRIPTION("AT91 SSC ASoC Interface");
-MODULE_LICENSE("GPL");