Changes were required to support latest AT91 header files.
Also updated to remove AT91RM9200-specific code in the ASoC
platform drivers to support the AT91SAM9260 and AT91SAM9261
chips, but no testing was performed on these chips.
Signed-off-by: Frank Mandarino <fmandarino@endrelia.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
# AT91 Platform Support
-snd-soc-at91-objs := at91rm9200-pcm.o
-snd-soc-at91-i2s-objs := at91rm9200-i2s.o
+snd-soc-at91-objs := at91-pcm.o
+snd-soc-at91-i2s-objs := at91-i2s.o
obj-$(CONFIG_SND_AT91_SOC) += snd-soc-at91.o
obj-$(CONFIG_SND_AT91_SOC_I2S) += snd-soc-at91-i2s.o
--- /dev/null
+/*
+ * at91-i2s.c -- ALSA SoC I2S Audio Layer Platform driver
+ *
+ * Author: Frank Mandarino <fmandarino@endrelia.com>
+ * Endrelia Technologies Inc.
+ *
+ * Based on pxa2xx Platform drivers by
+ * Liam Girdwood <liam.girdwood@wolfsonmicro.com>
+ *
+ * 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.
+ *
+ * Revision history
+ * 3rd Mar 2006 Initial 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 <sound/driver.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_ssc.h>
+#include <asm/arch/at91_pdc.h>
+
+#include "at91-pcm.h"
+
+#if 0
+#define DBG(x...) printk(KERN_DEBUG "at91-i2s:" x)
+#else
+#define DBG(x...)
+#endif
+
+#if defined(CONFIG_ARCH_AT91SAM9260)
+#define NUM_SSC_DEVICES 1
+#else
+#define NUM_SSC_DEVICES 3
+#endif
+
+
+#define AT91_I2S_DAIFMT \
+ (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_NB_NF)
+
+#define AT91_I2S_DIR \
+ (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
+
+/* priv is (SSC_CMR.DIV << 16 | SSC_TCMR.PERIOD ) */
+static struct snd_soc_dai_mode at91_i2s[] = {
+
+ /* 8k: BCLK = (MCLK/10) = (60MHz/50) = 1.2MHz */
+ {
+ .fmt = AT91_I2S_DAIFMT,
+ .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
+ .pcmrate = SNDRV_PCM_RATE_8000,
+ .pcmdir = AT91_I2S_DIR,
+ .flags = SND_SOC_DAI_BFS_DIV,
+ .fs = 1500,
+ .bfs = SND_SOC_FSBD(10),
+ .priv = (25 << 16 | 74),
+ },
+
+ /* 16k: BCLK = (MCLK/3) ~= (60MHz/14) = 4.285714MHz */
+ {
+ .fmt = AT91_I2S_DAIFMT,
+ .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
+ .pcmrate = SNDRV_PCM_RATE_16000,
+ .pcmdir = AT91_I2S_DIR,
+ .flags = SND_SOC_DAI_BFS_DIV,
+ .fs = 750,
+ .bfs = SND_SOC_FSBD(3),
+ .priv = (7 << 16 | 133),
+ },
+
+ /* 32k: BCLK = (MCLK/3) ~= (60MHz/14) = 4.285714MHz */
+ {
+ .fmt = AT91_I2S_DAIFMT,
+ .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
+ .pcmrate = SNDRV_PCM_RATE_32000,
+ .pcmdir = AT91_I2S_DIR,
+ .flags = SND_SOC_DAI_BFS_DIV,
+ .fs = 375,
+ .bfs = SND_SOC_FSBD(3),
+ .priv = (7 << 16 | 66),
+ },
+
+ /* 48k: BCLK = (MCLK/5) ~= (60MHz/26) = 2.3076923MHz */
+ {
+ .fmt = AT91_I2S_DAIFMT,
+ .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
+ .pcmrate = SNDRV_PCM_RATE_48000,
+ .pcmdir = AT91_I2S_DIR,
+ .flags = SND_SOC_DAI_BFS_DIV,
+ .fs = 250,
+ .bfs SND_SOC_FSBD(5),
+ .priv = (13 << 16 | 23),
+ },
+};
+
+
+/*
+ * SSC PDC registers required by the PCM DMA engine.
+ */
+static struct at91_pdc_regs pdc_tx_reg = {
+ .xpr = AT91_PDC_TPR,
+ .xcr = AT91_PDC_TCR,
+ .xnpr = AT91_PDC_TNPR,
+ .xncr = AT91_PDC_TNCR,
+};
+
+static struct at91_pdc_regs pdc_rx_reg = {
+ .xpr = AT91_PDC_RPR,
+ .xcr = AT91_PDC_RCR,
+ .xnpr = AT91_PDC_RNPR,
+ .xncr = AT91_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 = AT91_PDC_TXTEN,
+ .pdc_disable = AT91_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 = AT91_PDC_RXTEN,
+ .pdc_disable = AT91_PDC_RXTDIS,
+};
+
+
+/*
+ * DMA parameters.
+ */
+static struct at91_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
+ {{
+ .name = "SSC0/I2S PCM Stereo out",
+ .pdc = &pdc_tx_reg,
+ .mask = &ssc_tx_mask,
+ },
+ {
+ .name = "SSC0/I2S PCM Stereo in",
+ .pdc = &pdc_rx_reg,
+ .mask = &ssc_rx_mask,
+ }},
+#if NUM_SSC_DEVICES == 3
+ {{
+ .name = "SSC1/I2S PCM Stereo out",
+ .pdc = &pdc_tx_reg,
+ .mask = &ssc_tx_mask,
+ },
+ {
+ .name = "SSC1/I2S PCM Stereo in",
+ .pdc = &pdc_rx_reg,
+ .mask = &ssc_rx_mask,
+ }},
+ {{
+ .name = "SSC2/I2S PCM Stereo out",
+ .pdc = &pdc_tx_reg,
+ .mask = &ssc_tx_mask,
+ },
+ {
+ .name = "SSC1/I2S PCM Stereo in",
+ .pdc = &pdc_rx_reg,
+ .mask = &ssc_rx_mask,
+ }},
+#endif
+};
+
+
+/*
+ * A MUTEX is used to protect an SSC initialzed flag which allows
+ * the substream hw_params() call to initialize the SSC only if
+ * there are no other substreams open. If there are other
+ * substreams open, the hw_param() call can only check that
+ * it is using the same format and rate.
+ */
+static DECLARE_MUTEX(ssc0_mutex);
+#if NUM_SSC_DEVICES == 3
+static DECLARE_MUTEX(ssc1_mutex);
+static DECLARE_MUTEX(ssc2_mutex);
+#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 */
+ int dir_mask; /* 0=unused, 1=playback, 2=capture */
+ struct semaphore *mutex;
+ int initialized;
+ int pcmfmt;
+ int rate;
+ 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,
+ .dir_mask = 0,
+ .mutex = &ssc0_mutex,
+ .initialized = 0,
+ },
+#if NUM_SSC_DEVICES == 3
+ {
+ .name = "ssc1",
+ .lock = SPIN_LOCK_UNLOCKED,
+ .dir_mask = 0,
+ .mutex = &ssc1_mutex,
+ .initialized = 0,
+ },
+ {
+ .name = "ssc2",
+ .lock = SPIN_LOCK_UNLOCKED,
+ .dir_mask = 0,
+ .mutex = &ssc2_mutex,
+ .initialized = 0,
+ },
+#endif
+};
+
+
+static irqreturn_t at91_i2s_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;
+}
+
+static int at91_i2s_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct at91_ssc_info *ssc_p = &ssc_info[rtd->cpu_dai->id];
+ int dir_mask;
+
+ DBG("i2s_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;
+}
+
+static void at91_i2s_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct at91_ssc_info *ssc_p = &ssc_info[rtd->cpu_dai->id];
+ struct at91_pcm_dma_params *dma_params = rtd->cpu_dai->dma_data;
+ int dir, dir_mask;
+
+ dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
+
+ 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);
+
+ /* Reset the SSC */
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR, AT91_SSC_SWRST);
+
+ /* Force a re-init on the next hw_params() call. */
+ ssc_p->initialized = 0;
+ }
+ spin_unlock_irq(&ssc_p->lock);
+}
+
+#ifdef CONFIG_PM
+static int at91_i2s_suspend(struct platform_device *pdev,
+ struct snd_soc_cpu_dai *dai)
+{
+ struct at91_ssc_info *ssc_p;
+
+ if(!dai->active)
+ return 0;
+
+ ssc_p = &ssc_info[dai->id];
+
+ /* Save the status register before disabling transmit and receive. */
+ ssc_p->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->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->state->ssc_imr);
+
+ ssc_p->state->ssc_cmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_CMR);
+ ssc_p->state->ssc_rcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
+ ssc_p->state->ssc_rfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
+ ssc_p->state->ssc_tcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
+ ssc_p->state->ssc_tfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
+
+ return 0;
+}
+
+static int at91_i2s_resume(struct platform_device *pdev,
+ struct snd_soc_cpu_dai *dai)
+{
+ struct at91_ssc_info *ssc_p;
+ u32 cr_mask;
+
+ if(!dai->active)
+ return 0;
+
+ ssc_p = &ssc_info[dai->id];
+
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->state->ssc_tfmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->state->ssc_tcmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->state->ssc_rfmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->state->ssc_rcmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, ssc_p->state->ssc_cmr);
+
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IER, ssc_p->state->ssc_imr);
+
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR,
+ ((ssc_p->state->ssc_sr & AT91_SSC_RXENA) ? AT91_SSC_RXEN : 0) |
+ ((ssc_p->state->ssc_sr & AT91_SSC_TXENA) ? AT91_SSC_TXEN : 0));
+
+ return 0;
+}
+
+#else
+#define at91_i2s_suspend NULL
+#define at91_i2s_resume NULL
+#endif
+
+static unsigned int at91_i2s_config_sysclk(
+ struct snd_soc_cpu_dai *iface, struct snd_soc_clock_info *info,
+ unsigned int clk)
+{
+ /* Currently, there is only support for USB (12Mhz) mode */
+ if (clk != 12000000)
+ return 0;
+ return 12000000;
+}
+
+static int at91_i2s_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->cpu_dai->id;
+ struct at91_ssc_info *ssc_p = &ssc_info[id];
+ struct at91_pcm_dma_params *dma_params;
+ unsigned int pcmfmt, rate;
+ int dir, channels, bits;
+ struct clk *mck_clk;
+ u32 div, period, tfmr, rfmr, tcmr, rcmr;
+ 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;
+ rtd->cpu_dai->dma_data = dma_params;
+
+ rate = params_rate(params);
+ channels = params_channels(params);
+
+ pcmfmt = rtd->cpu_dai->dai_runtime.pcmfmt;
+ switch (pcmfmt) {
+ case SNDRV_PCM_FMTBIT_S16_LE:
+ /* likely this is all we'll ever support, but ... */
+ bits = 16;
+ dma_params->pdc_xfer_size = 2;
+ break;
+ default:
+ printk(KERN_WARNING "at91-i2s: unsupported format %x\n",
+ pcmfmt);
+ return -EINVAL;
+ }
+
+ /* Don't allow both SSC substreams to initialize at the same time. */
+ down(ssc_p->mutex);
+
+ /*
+ * If this SSC is alreadly initialized, then this substream must use
+ * the same format and rate.
+ */
+ if (ssc_p->initialized) {
+ if (pcmfmt != ssc_p->pcmfmt || rate != ssc_p->rate) {
+ printk(KERN_WARNING "at91-i2s: "
+ "incompatible substream in other direction\n");
+ up(ssc_p->mutex);
+ return -EINVAL;
+ }
+ } else {
+ /* 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 */
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR, AT91_SSC_SWRST);
+
+ at91_ssc_write(ssc_p->ssc.base + AT91_PDC_RPR, 0);
+ at91_ssc_write(ssc_p->ssc.base + AT91_PDC_RCR, 0);
+ at91_ssc_write(ssc_p->ssc.base + AT91_PDC_RNPR, 0);
+ at91_ssc_write(ssc_p->ssc.base + AT91_PDC_RNCR, 0);
+ at91_ssc_write(ssc_p->ssc.base + AT91_PDC_TPR, 0);
+ at91_ssc_write(ssc_p->ssc.base + AT91_PDC_TCR, 0);
+ at91_ssc_write(ssc_p->ssc.base + AT91_PDC_TNPR, 0);
+ at91_ssc_write(ssc_p->ssc.base + AT91_PDC_TNCR, 0);
+
+ div = rtd->cpu_dai->dai_runtime.priv >> 16;
+ period = rtd->cpu_dai->dai_runtime.priv & 0xffff;
+
+ mck_clk = clk_get(NULL, "mck");
+
+ DBG("mck %lu fsbd %u bfs %llu bfs_real %u bclk %lu div %u period %u\n",
+ clk_get_rate(mck_clk),
+ SND_SOC_FSBD(6),
+ rtd->cpu_dai->dai_runtime.bfs,
+ SND_SOC_FSBD_REAL(rtd->cpu_dai->dai_runtime.bfs),
+ clk_get_rate(mck_clk) / (2 * div),
+ div,
+ period);
+
+ clk_put(mck_clk);
+
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, div);
+
+ /*
+ * Setup the TFMR and RFMR for the proper data format.
+ */
+ 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);
+ DBG("SSC_TFMR=0x%08x\n", tfmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TFMR, tfmr);
+
+ rfmr =
+ (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
+ | (( AT91_SSC_FSOS_NONE ) & 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);
+
+ DBG("SSC_RFMR=0x%08x\n", rfmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RFMR, rfmr);
+
+ /*
+ * Setup the TCMR and RCMR to generate the proper BCLK
+ * and LRC signals.
+ */
+ 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);
+
+ DBG("SSC_TCMR=0x%08x\n", tcmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TCMR, tcmr);
+
+ rcmr =
+ (( 0 << 24) & AT91_SSC_PERIOD)
+ | (( 1 << 16) & AT91_SSC_STTDLY)
+ | (( AT91_SSC_START_TX_RX ) & AT91_SSC_START)
+ | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
+ | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
+ | (( AT91_SSC_CKS_CLOCK ) & AT91_SSC_CKS);
+
+ DBG("SSC_RCMR=0x%08x\n", rcmr);
+ at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, rcmr);
+
+ if ((ret = request_irq(ssc_p->ssc.pid, at91_i2s_interrupt,
+ 0, ssc_p->name, ssc_p)) < 0) {
+ printk(KERN_WARNING "at91-i2s: request_irq failure\n");
+ return ret;
+ }
+
+ /*
+ * Save the current substream parameters in order to check
+ * that the substream in the opposite direction uses the
+ * same parameters.
+ */
+ ssc_p->pcmfmt = pcmfmt;
+ ssc_p->rate = rate;
+ ssc_p->initialized = 1;
+
+ DBG("hw_params: SSC initialized\n");
+ }
+
+ up(ssc_p->mutex);
+
+ return 0;
+}
+
+
+static int at91_i2s_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct at91_pcm_dma_params *dma_params = rtd->cpu_dai->dma_data;
+
+ at91_ssc_write(dma_params->ssc_base + AT91_SSC_CR,
+ dma_params->mask->ssc_enable);
+
+ DBG("%s enabled SSC_SR=0x%08lx\n",
+ substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? "transmit" : "receive",
+ at91_ssc_read(ssc_info[rtd->cpu_dai->id].ssc.base + AT91_SSC_SR));
+ return 0;
+}
+
+
+struct snd_soc_cpu_dai at91_i2s_dai[NUM_SSC_DEVICES] = {
+ { .name = "at91_ssc0/i2s",
+ .id = 0,
+ .type = SND_SOC_DAI_I2S,
+ .suspend = at91_i2s_suspend,
+ .resume = at91_i2s_resume,
+ .config_sysclk = at91_i2s_config_sysclk,
+ .playback = {
+ .channels_min = 1,
+ .channels_max = 2,},
+ .capture = {
+ .channels_min = 1,
+ .channels_max = 2,},
+ .ops = {
+ .startup = at91_i2s_startup,
+ .shutdown = at91_i2s_shutdown,
+ .prepare = at91_i2s_prepare,
+ .hw_params = at91_i2s_hw_params,},
+ .caps = {
+ .mode = &at91_i2s[0],
+ .num_modes = ARRAY_SIZE(at91_i2s),},
+ .private_data = &ssc_info[0].ssc,
+ },
+#if NUM_SSC_DEVICES == 3
+ { .name = "at91_ssc1/i2s",
+ .id = 1,
+ .type = SND_SOC_DAI_I2S,
+ .suspend = at91_i2s_suspend,
+ .resume = at91_i2s_resume,
+ .config_sysclk = at91_i2s_config_sysclk,
+ .playback = {
+ .channels_min = 1,
+ .channels_max = 2,},
+ .capture = {
+ .channels_min = 1,
+ .channels_max = 2,},
+ .ops = {
+ .startup = at91_i2s_startup,
+ .shutdown = at91_i2s_shutdown,
+ .prepare = at91_i2s_prepare,
+ .hw_params = at91_i2s_hw_params,},
+ .caps = {
+ .mode = &at91_i2s[0],
+ .num_modes = ARRAY_SIZE(at91_i2s),},
+ .private_data = &ssc_info[1].ssc,
+ },
+ { .name = "at91_ssc2/i2s",
+ .id = 2,
+ .type = SND_SOC_DAI_I2S,
+ .suspend = at91_i2s_suspend,
+ .resume = at91_i2s_resume,
+ .config_sysclk = at91_i2s_config_sysclk,
+ .playback = {
+ .channels_min = 1,
+ .channels_max = 2,},
+ .capture = {
+ .channels_min = 1,
+ .channels_max = 2,},
+ .ops = {
+ .startup = at91_i2s_startup,
+ .shutdown = at91_i2s_shutdown,
+ .prepare = at91_i2s_prepare,
+ .hw_params = at91_i2s_hw_params,},
+ .caps = {
+ .mode = &at91_i2s[0],
+ .num_modes = ARRAY_SIZE(at91_i2s),},
+ .private_data = &ssc_info[2].ssc,
+ },
+#endif
+};
+
+EXPORT_SYMBOL_GPL(at91_i2s_dai);
+
+/* Module information */
+MODULE_AUTHOR("Frank Mandarino, fmandarino@endrelia.com, www.endrelia.com");
+MODULE_DESCRIPTION("AT91 I2S ASoC Interface");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * at91-pcm.c -- ALSA PCM interface for the Atmel AT91 SoC
+ *
+ * Author: Frank Mandarino <fmandarino@endrelia.com>
+ * Endrelia Technologies Inc.
+ * Created: Mar 3, 2006
+ *
+ * Based on pxa2xx-pcm.c by:
+ *
+ * Author: Nicolas Pitre
+ * Created: Nov 30, 2004
+ * Copyright: (C) 2004 MontaVista Software, Inc.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_ssc.h>
+#include <asm/arch/at91_pdc.h>
+
+#include "at91-pcm.h"
+
+#if 0
+#define DBG(x...) printk(KERN_INFO "at91-pcm: " x)
+#else
+#define DBG(x...)
+#endif
+
+static const struct snd_pcm_hardware at91_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_PAUSE,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .period_bytes_min = 32,
+ .period_bytes_max = 8192,
+ .periods_min = 2,
+ .periods_max = 1024,
+ .buffer_bytes_max = 32 * 1024,
+};
+
+struct at91_runtime_data {
+ struct at91_pcm_dma_params *params;
+ dma_addr_t dma_buffer; /* physical address of dma buffer */
+ dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
+ size_t period_size;
+ dma_addr_t period_ptr; /* physical address of next period */
+ u32 pdc_xpr_save; /* PDC register save */
+ u32 pdc_xcr_save;
+ u32 pdc_xnpr_save;
+ u32 pdc_xncr_save;
+};
+
+static void at91_pcm_dma_irq(u32 ssc_sr,
+ struct snd_pcm_substream *substream)
+{
+ struct at91_runtime_data *prtd = substream->runtime->private_data;
+ struct at91_pcm_dma_params *params = prtd->params;
+ static int count = 0;
+
+ count++;
+
+ if (ssc_sr & params->mask->ssc_endbuf) {
+
+ printk(KERN_WARNING
+ "at91-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
+ substream->stream == SNDRV_PCM_STREAM_PLAYBACK
+ ? "underrun" : "overrun",
+ params->name, ssc_sr, count);
+
+ /* re-start the PDC */
+ at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_disable);
+
+ prtd->period_ptr += prtd->period_size;
+ if (prtd->period_ptr >= prtd->dma_buffer_end) {
+ prtd->period_ptr = prtd->dma_buffer;
+ }
+
+ at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->period_ptr);
+ at91_ssc_write(params->ssc_base + params->pdc->xcr,
+ prtd->period_size / params->pdc_xfer_size);
+
+ at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_enable);
+ }
+
+ if (ssc_sr & params->mask->ssc_endx) {
+
+ /* Load the PDC next pointer and counter registers */
+ prtd->period_ptr += prtd->period_size;
+ if (prtd->period_ptr >= prtd->dma_buffer_end) {
+ prtd->period_ptr = prtd->dma_buffer;
+ }
+ at91_ssc_write(params->ssc_base + params->pdc->xnpr, prtd->period_ptr);
+ at91_ssc_write(params->ssc_base + params->pdc->xncr,
+ prtd->period_size / params->pdc_xfer_size);
+ }
+
+ snd_pcm_period_elapsed(substream);
+}
+
+static int at91_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct at91_runtime_data *prtd = runtime->private_data;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+ /* this may get called several times by oss emulation
+ * with different params */
+
+ snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+ runtime->dma_bytes = params_buffer_bytes(params);
+
+ prtd->params = rtd->cpu_dai->dma_data;
+ prtd->params->dma_intr_handler = at91_pcm_dma_irq;
+
+ prtd->dma_buffer = runtime->dma_addr;
+ prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
+ prtd->period_size = params_period_bytes(params);
+
+ DBG("hw_params: DMA for %s initialized (dma_bytes=%d, period_size=%d)\n",
+ prtd->params->name, runtime->dma_bytes, prtd->period_size);
+ return 0;
+}
+
+static int at91_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct at91_runtime_data *prtd = substream->runtime->private_data;
+ struct at91_pcm_dma_params *params = prtd->params;
+
+ if (params != NULL) {
+ at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_disable);
+ prtd->params->dma_intr_handler = NULL;
+ }
+
+ return 0;
+}
+
+static int at91_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct at91_runtime_data *prtd = substream->runtime->private_data;
+ struct at91_pcm_dma_params *params = prtd->params;
+
+ at91_ssc_write(params->ssc_base + AT91_SSC_IDR,
+ params->mask->ssc_endx | params->mask->ssc_endbuf);
+
+ at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_disable);
+ return 0;
+}
+
+static int at91_pcm_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ struct at91_runtime_data *prtd = substream->runtime->private_data;
+ struct at91_pcm_dma_params *params = prtd->params;
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ prtd->period_ptr = prtd->dma_buffer;
+
+ at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->period_ptr);
+ at91_ssc_write(params->ssc_base + params->pdc->xcr,
+ prtd->period_size / params->pdc_xfer_size);
+
+ prtd->period_ptr += prtd->period_size;
+ at91_ssc_write(params->ssc_base + params->pdc->xnpr, prtd->period_ptr);
+ at91_ssc_write(params->ssc_base + params->pdc->xncr,
+ prtd->period_size / params->pdc_xfer_size);
+
+ DBG("trigger: period_ptr=%lx, xpr=%lx, xcr=%ld, xnpr=%lx, xncr=%ld\n",
+ (unsigned long) prtd->period_ptr,
+ at91_ssc_read(params->ssc_base + params->pdc->xpr),
+ at91_ssc_read(params->ssc_base + params->pdc->xcr),
+ at91_ssc_read(params->ssc_base + params->pdc->xnpr),
+ at91_ssc_read(params->ssc_base + params->pdc->xncr));
+
+ at91_ssc_write(params->ssc_base + AT91_SSC_IER,
+ params->mask->ssc_endx | params->mask->ssc_endbuf);
+
+ at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_enable);
+
+ DBG("sr=%lx imr=%lx\n", at91_ssc_read(params->ssc_base + AT91_SSC_SR),
+ at91_ssc_read(params->ssc_base + AT91_SSC_IER));
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_disable);
+ break;
+
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_enable);
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static snd_pcm_uframes_t at91_pcm_pointer(
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct at91_runtime_data *prtd = runtime->private_data;
+ struct at91_pcm_dma_params *params = prtd->params;
+ dma_addr_t ptr;
+ snd_pcm_uframes_t x;
+
+ ptr = (dma_addr_t) at91_ssc_read(params->ssc_base + params->pdc->xpr);
+ x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
+
+ if (x == runtime->buffer_size)
+ x = 0;
+ return x;
+}
+
+static int at91_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct at91_runtime_data *prtd;
+ int ret = 0;
+
+ snd_soc_set_runtime_hwparams(substream, &at91_pcm_hardware);
+
+ /* ensure that buffer size is a multiple of period size */
+ ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0)
+ goto out;
+
+ prtd = kzalloc(sizeof(struct at91_runtime_data), GFP_KERNEL);
+ if (prtd == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ runtime->private_data = prtd;
+
+ out:
+ return ret;
+}
+
+static int at91_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct at91_runtime_data *prtd = substream->runtime->private_data;
+
+ kfree(prtd);
+ return 0;
+}
+
+static int at91_pcm_mmap(struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ return dma_mmap_writecombine(substream->pcm->card->dev, vma,
+ runtime->dma_area,
+ runtime->dma_addr,
+ runtime->dma_bytes);
+}
+
+struct snd_pcm_ops at91_pcm_ops = {
+ .open = at91_pcm_open,
+ .close = at91_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = at91_pcm_hw_params,
+ .hw_free = at91_pcm_hw_free,
+ .prepare = at91_pcm_prepare,
+ .trigger = at91_pcm_trigger,
+ .pointer = at91_pcm_pointer,
+ .mmap = at91_pcm_mmap,
+};
+
+static int at91_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
+ int stream)
+{
+ struct snd_pcm_substream *substream = pcm->streams[stream].substream;
+ struct snd_dma_buffer *buf = &substream->dma_buffer;
+ size_t size = at91_pcm_hardware.buffer_bytes_max;
+
+ buf->dev.type = SNDRV_DMA_TYPE_DEV;
+ buf->dev.dev = pcm->card->dev;
+ buf->private_data = NULL;
+ buf->area = dma_alloc_writecombine(pcm->card->dev, size,
+ &buf->addr, GFP_KERNEL);
+
+ DBG("preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
+ (void *) buf->area,
+ (void *) buf->addr,
+ size);
+
+ if (!buf->area)
+ return -ENOMEM;
+
+ buf->bytes = size;
+ return 0;
+}
+
+static u64 at91_pcm_dmamask = 0xffffffff;
+
+static int at91_pcm_new(struct snd_card *card,
+ struct snd_soc_codec_dai *dai, struct snd_pcm *pcm)
+{
+ int ret = 0;
+
+ if (!card->dev->dma_mask)
+ card->dev->dma_mask = &at91_pcm_dmamask;
+ if (!card->dev->coherent_dma_mask)
+ card->dev->coherent_dma_mask = 0xffffffff;
+
+ if (dai->playback.channels_min) {
+ ret = at91_pcm_preallocate_dma_buffer(pcm,
+ SNDRV_PCM_STREAM_PLAYBACK);
+ if (ret)
+ goto out;
+ }
+
+ if (dai->capture.channels_min) {
+ ret = at91_pcm_preallocate_dma_buffer(pcm,
+ SNDRV_PCM_STREAM_CAPTURE);
+ if (ret)
+ goto out;
+ }
+ out:
+ return ret;
+}
+
+static void at91_pcm_free_dma_buffers(struct snd_pcm *pcm)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_dma_buffer *buf;
+ int stream;
+
+ for (stream = 0; stream < 2; stream++) {
+ substream = pcm->streams[stream].substream;
+ if (!substream)
+ continue;
+
+ buf = &substream->dma_buffer;
+ if (!buf->area)
+ continue;
+
+ dma_free_writecombine(pcm->card->dev, buf->bytes,
+ buf->area, buf->addr);
+ buf->area = NULL;
+ }
+}
+
+static int at91_pcm_suspend(struct platform_device *pdev,
+ struct snd_soc_cpu_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = dai->runtime;
+ struct at91_runtime_data *prtd;
+ struct at91_pcm_dma_params *params;
+
+ if (!runtime)
+ return 0;
+
+ prtd = runtime->private_data;
+ params = prtd->params;
+
+ /* disable the PDC and save the PDC registers */
+
+ at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_disable);
+
+ prtd->pdc_xpr_save = at91_ssc_read(params->ssc_base + params->pdc->xpr);
+ prtd->pdc_xcr_save = at91_ssc_read(params->ssc_base + params->pdc->xcr);
+ prtd->pdc_xnpr_save = at91_ssc_read(params->ssc_base + params->pdc->xnpr);
+ prtd->pdc_xncr_save = at91_ssc_read(params->ssc_base + params->pdc->xncr);
+
+ return 0;
+}
+
+static int at91_pcm_resume(struct platform_device *pdev,
+ struct snd_soc_cpu_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = dai->runtime;
+ struct at91_runtime_data *prtd;
+ struct at91_pcm_dma_params *params;
+
+ if (!runtime)
+ return 0;
+
+ prtd = runtime->private_data;
+ params = prtd->params;
+
+ /* restore the PDC registers and enable the PDC */
+ at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->pdc_xpr_save);
+ at91_ssc_write(params->ssc_base + params->pdc->xcr, prtd->pdc_xcr_save);
+ at91_ssc_write(params->ssc_base + params->pdc->xnpr, prtd->pdc_xnpr_save);
+ at91_ssc_write(params->ssc_base + params->pdc->xncr, prtd->pdc_xncr_save);
+
+ at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_enable);
+ return 0;
+}
+
+struct snd_soc_platform at91_soc_platform = {
+ .name = "at91-audio",
+ .pcm_ops = &at91_pcm_ops,
+ .pcm_new = at91_pcm_new,
+ .pcm_free = at91_pcm_free_dma_buffers,
+ .suspend = at91_pcm_suspend,
+ .resume = at91_pcm_resume,
+};
+
+EXPORT_SYMBOL_GPL(at91_soc_platform);
+
+MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>");
+MODULE_DESCRIPTION("Atmel AT91 PCM module");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC
+ *
+ * Author: Frank Mandarino <fmandarino@endrelia.com>
+ * Endrelia Technologies Inc.
+ * Created: Mar 3, 2006
+ *
+ * Based on pxa2xx-pcm.h by:
+ *
+ * Author: Nicolas Pitre
+ * Created: Nov 30, 2004
+ * Copyright: MontaVista Software, Inc.
+ *
+ * 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.
+ */
+
+#include <asm/arch/hardware.h>
+
+struct at91_ssc_periph {
+ void __iomem *base;
+ u32 pid;
+};
+
+
+/*
+ * Registers and status bits that are required by the PCM driver.
+ */
+struct at91_pdc_regs {
+ unsigned int xpr; /* PDC recv/trans pointer */
+ unsigned int xcr; /* PDC recv/trans counter */
+ unsigned int xnpr; /* PDC next recv/trans pointer */
+ unsigned int xncr; /* PDC next recv/trans counter */
+ unsigned int ptcr; /* PDC transfer control */
+};
+
+struct at91_ssc_mask {
+ u32 ssc_enable; /* SSC recv/trans enable */
+ u32 ssc_disable; /* SSC recv/trans disable */
+ u32 ssc_endx; /* SSC ENDTX or ENDRX */
+ u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */
+ u32 pdc_enable; /* PDC recv/trans enable */
+ u32 pdc_disable; /* PDC recv/trans disable */
+};
+
+
+/*
+ * This structure, shared between the PCM driver and the interface,
+ * contains all information required by the PCM driver to perform the
+ * PDC DMA operation. All fields except dma_intr_handler() are initialized
+ * by the interface. The dms_intr_handler() pointer is set by the PCM
+ * driver and called by the interface SSC interrupt handler if it is
+ * non-NULL.
+ */
+struct at91_pcm_dma_params {
+ char *name; /* stream identifier */
+ int pdc_xfer_size; /* PDC counter increment in bytes */
+ void __iomem *ssc_base; /* SSC base address */
+ struct at91_pdc_regs *pdc; /* PDC receive or transmit registers */
+ struct at91_ssc_mask *mask;/* SSC & PDC status bits */
+ struct snd_pcm_substream *substream;
+ void (*dma_intr_handler)(u32, struct snd_pcm_substream *);
+};
+
+extern struct snd_soc_cpu_dai at91_i2s_dai[3];
+extern struct snd_soc_platform at91_soc_platform;
+
+
+#define at91_ssc_read(a) ((unsigned long) __raw_readl(a))
+#define at91_ssc_write(a,v) __raw_writel((v),(a))
+++ /dev/null
-/*
- * at91rm9200-i2s.c -- ALSA Soc Audio Layer Platform driver and DMA engine
- *
- * Author: Frank Mandarino <fmandarino@endrelia.com>
- * Endrelia Technologies Inc.
- *
- * Based on pxa2xx Platform drivers by
- * Liam Girdwood <liam.girdwood@wolfsonmicro.com>
- *
- * 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.
- *
- * Revision history
- * 3rd Mar 2006 Initial 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 <sound/driver.h>
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/initval.h>
-#include <sound/soc.h>
-
-#include <asm/arch/at91rm9200.h>
-#include <asm/arch/at91rm9200_ssc.h>
-#include <asm/arch/at91rm9200_pdc.h>
-#include <asm/arch/hardware.h>
-
-#include "at91rm9200-pcm.h"
-
-#if 0
-#define DBG(x...) printk(KERN_DEBUG "at91rm9200-i2s:" x)
-#else
-#define DBG(x...)
-#endif
-
-#define AT91RM9200_I2S_DAIFMT \
- (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_NB_NF)
-
-#define AT91RM9200_I2S_DIR \
- (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
-
-/* priv is (SSC_CMR.DIV << 16 | SSC_TCMR.PERIOD ) */
-static struct snd_soc_dai_mode at91rm9200_i2s[] = {
-
- /* 8k: BCLK = (MCLK/10) = (60MHz/50) = 1.2MHz */
- {
- .fmt = AT91RM9200_I2S_DAIFMT,
- .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
- .pcmrate = SNDRV_PCM_RATE_8000,
- .pcmdir = AT91RM9200_I2S_DIR,
- .flags = SND_SOC_DAI_BFS_DIV,
- .fs = 1500,
- .bfs = SND_SOC_FSBD(10),
- .priv = (25 << 16 | 74),
- },
-
- /* 16k: BCLK = (MCLK/3) ~= (60MHz/14) = 4.285714MHz */
- {
- .fmt = AT91RM9200_I2S_DAIFMT,
- .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
- .pcmrate = SNDRV_PCM_RATE_16000,
- .pcmdir = AT91RM9200_I2S_DIR,
- .flags = SND_SOC_DAI_BFS_DIV,
- .fs = 750,
- .bfs = SND_SOC_FSBD(3),
- .priv = (7 << 16 | 133),
- },
-
- /* 32k: BCLK = (MCLK/3) ~= (60MHz/14) = 4.285714MHz */
- {
- .fmt = AT91RM9200_I2S_DAIFMT,
- .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
- .pcmrate = SNDRV_PCM_RATE_32000,
- .pcmdir = AT91RM9200_I2S_DIR,
- .flags = SND_SOC_DAI_BFS_DIV,
- .fs = 375,
- .bfs = SND_SOC_FSBD(3),
- .priv = (7 << 16 | 66),
- },
-
- /* 48k: BCLK = (MCLK/5) ~= (60MHz/26) = 2.3076923MHz */
- {
- .fmt = AT91RM9200_I2S_DAIFMT,
- .pcmfmt = SNDRV_PCM_FMTBIT_S16_LE,
- .pcmrate = SNDRV_PCM_RATE_48000,
- .pcmdir = AT91RM9200_I2S_DIR,
- .flags = SND_SOC_DAI_BFS_DIV,
- .fs = 250,
- .bfs SND_SOC_FSBD(5),
- .priv = (13 << 16 | 23),
- },
-};
-
-
-/*
- * SSC registers required by the PCM DMA engine.
- */
-static struct at91rm9200_ssc_regs ssc_reg[3] = {
- {
- .cr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_SSC_CR),
- .ier = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_SSC_IER),
- .idr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_SSC_IDR),
- },
- {
- .cr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_SSC_CR),
- .ier = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_SSC_IER),
- .idr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_SSC_IDR),
- },
- {
- .cr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_SSC_CR),
- .ier = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_SSC_IER),
- .idr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_SSC_IDR),
- },
-};
-
-static struct at91rm9200_pdc_regs pdc_tx_reg[3] = {
- {
- .xpr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_PDC_TPR),
- .xcr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_PDC_TCR),
- .xnpr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_PDC_TNPR),
- .xncr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_PDC_TNCR),
- .ptcr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_PDC_PTCR),
- },
- {
- .xpr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_PDC_TPR),
- .xcr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_PDC_TCR),
- .xnpr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_PDC_TNPR),
- .xncr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_PDC_TNCR),
- .ptcr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_PDC_PTCR),
- },
- {
- .xpr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_PDC_TPR),
- .xcr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_PDC_TCR),
- .xnpr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_PDC_TNPR),
- .xncr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_PDC_TNCR),
- .ptcr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_PDC_PTCR),
- },
-};
-
-static struct at91rm9200_pdc_regs pdc_rx_reg[3] = {
- {
- .xpr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_PDC_RPR),
- .xcr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_PDC_RCR),
- .xnpr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_PDC_RNPR),
- .xncr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_PDC_RNCR),
- .ptcr = (void __iomem *) (AT91_VA_BASE_SSC0 + AT91_PDC_PTCR),
- },
- {
- .xpr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_PDC_RPR),
- .xcr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_PDC_RCR),
- .xnpr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_PDC_RNPR),
- .xncr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_PDC_RNCR),
- .ptcr = (void __iomem *) (AT91_VA_BASE_SSC1 + AT91_PDC_PTCR),
- },
- {
- .xpr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_PDC_RPR),
- .xcr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_PDC_RCR),
- .xnpr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_PDC_RNPR),
- .xncr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_PDC_RNCR),
- .ptcr = (void __iomem *) (AT91_VA_BASE_SSC2 + AT91_PDC_PTCR),
- },
-};
-
-/*
- * SSC & PDC status bits for transmit and receive.
- */
-static struct at91rm9200_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 = AT91_PDC_TXTEN,
- .pdc_disable = AT91_PDC_TXTDIS,
-};
-
-static struct at91rm9200_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 = AT91_PDC_RXTEN,
- .pdc_disable = AT91_PDC_RXTDIS,
-};
-
-/*
- * A MUTEX is used to protect an SSC initialzed flag which allows
- * the substream hw_params() call to initialize the SSC only if
- * there are no other substreams open. If there are other
- * substreams open, the hw_param() call can only check that
- * it is using the same format and rate.
- */
-static DECLARE_MUTEX(ssc0_mutex);
-static DECLARE_MUTEX(ssc1_mutex);
-static DECLARE_MUTEX(ssc2_mutex);
-
-/*
- * DMA parameters.
- */
-static at91rm9200_pcm_dma_params_t ssc_dma_params[3][2] = {
- {{
- .name = "SSC0/I2S PCM Stereo out",
- .ssc = &ssc_reg[0],
- .pdc = &pdc_tx_reg[0],
- .mask = &ssc_tx_mask,
- },
- {
- .name = "SSC0/I2S PCM Stereo in",
- .ssc = &ssc_reg[0],
- .pdc = &pdc_rx_reg[0],
- .mask = &ssc_rx_mask,
- }},
- {{
- .name = "SSC1/I2S PCM Stereo out",
- .ssc = &ssc_reg[1],
- .pdc = &pdc_tx_reg[1],
- .mask = &ssc_tx_mask,
- },
- {
- .name = "SSC1/I2S PCM Stereo in",
- .ssc = &ssc_reg[1],
- .pdc = &pdc_rx_reg[1],
- .mask = &ssc_rx_mask,
- }},
- {{
- .name = "SSC2/I2S PCM Stereo out",
- .ssc = &ssc_reg[2],
- .pdc = &pdc_tx_reg[2],
- .mask = &ssc_tx_mask,
- },
- {
- .name = "SSC1/I2S PCM Stereo in",
- .ssc = &ssc_reg[2],
- .pdc = &pdc_rx_reg[2],
- .mask = &ssc_rx_mask,
- }},
-};
-
-
-struct at91rm9200_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 at91rm9200_ssc_info {
- char *name;
- void __iomem *ssc_base;
- u32 pid;
- spinlock_t lock; /* lock for dir_mask */
- int dir_mask; /* 0=unused, 1=playback, 2=capture */
- struct semaphore *mutex;
- int initialized;
- int pcmfmt;
- int rate;
- at91rm9200_pcm_dma_params_t *dma_params[2];
- struct at91rm9200_ssc_state ssc_state;
-
-} ssc_info[3] = {
- {
- .name = "ssc0",
- .ssc_base = (void __iomem *) AT91_VA_BASE_SSC0,
- .pid = AT91_ID_SSC0,
- .lock = SPIN_LOCK_UNLOCKED,
- .dir_mask = 0,
- .mutex = &ssc0_mutex,
- .initialized = 0,
- },
- {
- .name = "ssc1",
- .ssc_base = (void __iomem *) AT91_VA_BASE_SSC1,
- .pid = AT91_ID_SSC1,
- .lock = SPIN_LOCK_UNLOCKED,
- .dir_mask = 0,
- .mutex = &ssc1_mutex,
- .initialized = 0,
- },
- {
- .name = "ssc2",
- .ssc_base = (void __iomem *) AT91_VA_BASE_SSC2,
- .pid = AT91_ID_SSC2,
- .lock = SPIN_LOCK_UNLOCKED,
- .dir_mask = 0,
- .mutex = &ssc2_mutex,
- .initialized = 0,
- },
-};
-
-
-static irqreturn_t at91rm9200_i2s_interrupt(int irq, void *dev_id)
-{
- struct at91rm9200_ssc_info *ssc_p = dev_id;
- at91rm9200_pcm_dma_params_t *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;
-}
-
-static int at91rm9200_i2s_startup(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct at91rm9200_ssc_info *ssc_p = &ssc_info[rtd->cpu_dai->id];
- int dir_mask;
-
- DBG("i2s_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;
-}
-
-static void at91rm9200_i2s_shutdown(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct at91rm9200_ssc_info *ssc_p = &ssc_info[rtd->cpu_dai->id];
- at91rm9200_pcm_dma_params_t *dma_params = rtd->cpu_dai->dma_data;
- int dir, dir_mask;
-
- dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
-
- if (dma_params != NULL) {
- at91_ssc_write(dma_params->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->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->pid);
- at91_sys_write(AT91_PMC_PCDR, 1<<ssc_p->pid);
-
- if (ssc_p->initialized)
- free_irq(ssc_p->pid, ssc_p);
-
- /* Reset the SSC */
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_CR, AT91_SSC_SWRST);
-
- /* Force a re-init on the next hw_params() call. */
- ssc_p->initialized = 0;
- }
- spin_unlock_irq(&ssc_p->lock);
-}
-
-#ifdef CONFIG_PM
-static int at91rm9200_i2s_suspend(struct platform_device *pdev,
- struct snd_soc_cpu_dai *dai)
-{
- struct at91rm9200_ssc_info *ssc_p;
-
- if(!dai->active)
- return 0;
-
- ssc_p = &ssc_info[dai->id];
-
- /* Save the status register before disabling transmit and receive. */
- ssc_p->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->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->state->ssc_imr);
-
- ssc_p->state->ssc_cmr = at91_ssc_read(ssc_p->ssc_base + AT91_SSC_CMR);
- ssc_p->state->ssc_rcmr = at91_ssc_read(ssc_p->ssc_base + AT91_SSC_RCMR);
- ssc_p->state->ssc_rfmr = at91_ssc_read(ssc_p->ssc_base + AT91_SSC_RCMR);
- ssc_p->state->ssc_tcmr = at91_ssc_read(ssc_p->ssc_base + AT91_SSC_RCMR);
- ssc_p->state->ssc_tfmr = at91_ssc_read(ssc_p->ssc_base + AT91_SSC_RCMR);
-
- return 0;
-}
-
-static int at91rm9200_i2s_resume(struct platform_device *pdev,
- struct snd_soc_cpu_dai *dai)
-{
- struct at91rm9200_ssc_info *ssc_p;
- u32 cr_mask;
-
- if(!dai->active)
- return 0;
-
- ssc_p = &ssc_info[dai->id];
-
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_RCMR, ssc_p->state->ssc_tfmr);
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_RCMR, ssc_p->state->ssc_tcmr);
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_RCMR, ssc_p->state->ssc_rfmr);
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_RCMR, ssc_p->state->ssc_rcmr);
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_CMR, ssc_p->state->ssc_cmr);
-
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_IER, ssc_p->state->ssc_imr);
-
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_CR,
- ((ssc_p->state->ssc_sr & AT91_SSC_RXENA) ? AT91_SSC_RXEN : 0) |
- ((ssc_p->state->ssc_sr & AT91_SSC_TXENA) ? AT91_SSC_TXEN : 0));
-
- return 0;
-}
-
-#else
-#define at91rm9200_i2s_suspend NULL
-#define at91rm9200_i2s_resume NULL
-#endif
-
-static unsigned int at91rm9200_i2s_config_sysclk(
- struct snd_soc_cpu_dai *iface, struct snd_soc_clock_info *info,
- unsigned int clk)
-{
- /* Currently, there is only support for USB (12Mhz) mode */
- if (clk != 12000000)
- return 0;
- return 12000000;
-}
-
-static int at91rm9200_i2s_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->cpu_dai->id;
- struct at91rm9200_ssc_info *ssc_p = &ssc_info[id];
- at91rm9200_pcm_dma_params_t *dma_params;
- unsigned int pcmfmt, rate;
- int dir, channels, bits;
- struct clk *mck_clk;
- unsigned long bclk;
- u32 div, period, tfmr, rfmr, tcmr, rcmr;
- 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->substream = substream;
-
- ssc_p->dma_params[dir] = dma_params;
- rtd->cpu_dai->dma_data = dma_params;
-
- rate = params_rate(params);
- channels = params_channels(params);
-
- pcmfmt = rtd->cpu_dai->dai_runtime.pcmfmt;
- switch (pcmfmt) {
- case SNDRV_PCM_FMTBIT_S16_LE:
- /* likely this is all we'll ever support, but ... */
- bits = 16;
- dma_params->pdc_xfer_size = 2;
- break;
- default:
- printk(KERN_WARNING "at91rm9200-i2s: unsupported format %x\n",
- pcmfmt);
- return -EINVAL;
- }
-
- /* Don't allow both SSC substreams to initialize at the same time. */
- down(ssc_p->mutex);
-
- /*
- * If this SSC is alreadly initialized, then this substream must use
- * the same format and rate.
- */
- if (ssc_p->initialized) {
- if (pcmfmt != ssc_p->pcmfmt || rate != ssc_p->rate) {
- printk(KERN_WARNING "at91rm9200-i2s: "
- "incompatible substream in other direction\n");
- up(ssc_p->mutex);
- return -EINVAL;
- }
- } else {
- /* Enable PMC peripheral clock for this SSC */
- DBG("Starting pid %d clock\n", ssc_p->pid);
- at91_sys_write(AT91_PMC_PCER, 1<<ssc_p->pid);
-
- /* Reset the SSC */
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_CR, AT91_SSC_SWRST);
-
- at91_ssc_write(ssc_p->ssc_base + AT91_PDC_RPR, 0);
- at91_ssc_write(ssc_p->ssc_base + AT91_PDC_RCR, 0);
- at91_ssc_write(ssc_p->ssc_base + AT91_PDC_RNPR, 0);
- at91_ssc_write(ssc_p->ssc_base + AT91_PDC_RNCR, 0);
- at91_ssc_write(ssc_p->ssc_base + AT91_PDC_TPR, 0);
- at91_ssc_write(ssc_p->ssc_base + AT91_PDC_TCR, 0);
- at91_ssc_write(ssc_p->ssc_base + AT91_PDC_TNPR, 0);
- at91_ssc_write(ssc_p->ssc_base + AT91_PDC_TNCR, 0);
-
- mck_clk = clk_get(NULL, "mck");
-
- div = rtd->cpu_dai->dai_runtime.priv >> 16;
- period = rtd->cpu_dai->dai_runtime.priv & 0xffff;
- bclk = 60000000 / (2 * div);
-
- DBG("mck %ld fsbd %d bfs %d bfs_real %d bclk %ld div %d period %d\n",
- clk_get_rate(mck_clk),
- SND_SOC_FSBD(6),
- rtd->cpu_dai->dai_runtime.bfs,
- SND_SOC_FSBD_REAL(rtd->cpu_dai->dai_runtime.bfs),
- bclk,
- div,
- period);
-
- clk_put(mck_clk);
-
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_CMR, div);
-
- /*
- * Setup the TFMR and RFMR for the proper data format.
- */
- 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);
- DBG("SSC_TFMR=0x%08x\n", tfmr);
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_TFMR, tfmr);
-
- rfmr =
- (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
- | (( AT91_SSC_FSOS_NONE ) & 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);
-
- DBG("SSC_RFMR=0x%08x\n", rfmr);
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_RFMR, rfmr);
-
- /*
- * Setup the TCMR and RCMR to generate the proper BCLK
- * and LRC signals.
- */
- 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);
-
- DBG("SSC_TCMR=0x%08x\n", tcmr);
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_TCMR, tcmr);
-
- rcmr =
- (( 0 << 24) & AT91_SSC_PERIOD)
- | (( 1 << 16) & AT91_SSC_STTDLY)
- | (( AT91_SSC_START_TX_RX ) & AT91_SSC_START)
- | (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
- | (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
- | (( AT91_SSC_CKS_CLOCK ) & AT91_SSC_CKS);
-
- DBG("SSC_RCMR=0x%08x\n", rcmr);
- at91_ssc_write(ssc_p->ssc_base + AT91_SSC_RCMR, rcmr);
-
- if ((ret = request_irq(ssc_p->pid, at91rm9200_i2s_interrupt,
- 0, ssc_p->name, ssc_p)) < 0) {
- printk(KERN_WARNING "at91rm9200-i2s: request_irq failure\n");
- return ret;
- }
-
- /*
- * Save the current substream parameters in order to check
- * that the substream in the opposite direction uses the
- * same parameters.
- */
- ssc_p->pcmfmt = pcmfmt;
- ssc_p->rate = rate;
- ssc_p->initialized = 1;
-
- DBG("hw_params: SSC initialized\n");
- }
-
- up(ssc_p->mutex);
-
- return 0;
-}
-
-
-static int at91rm9200_i2s_prepare(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- at91rm9200_pcm_dma_params_t *dma_params = rtd->cpu_dai->dma_data;
-
- at91_ssc_write(dma_params->ssc->cr, dma_params->mask->ssc_enable);
-
- DBG("%s enabled SSC_SR=0x%08lx\n",
- substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? "transmit" : "receive",
- at91_ssc_read(ssc_info[rtd->cpu_dai->id].ssc_base + AT91_SSC_SR));
- return 0;
-}
-
-
-struct snd_soc_cpu_dai at91rm9200_i2s_dai[] = {
- { .name = "at91rm9200-ssc0/i2s",
- .id = 0,
- .type = SND_SOC_DAI_I2S,
- .suspend = at91rm9200_i2s_suspend,
- .resume = at91rm9200_i2s_resume,
- .config_sysclk = at91rm9200_i2s_config_sysclk,
- .playback = {
- .channels_min = 1,
- .channels_max = 2,},
- .capture = {
- .channels_min = 1,
- .channels_max = 2,},
- .ops = {
- .startup = at91rm9200_i2s_startup,
- .shutdown = at91rm9200_i2s_shutdown,
- .prepare = at91rm9200_i2s_prepare,
- .hw_params = at91rm9200_i2s_hw_params,},
- .caps = {
- .mode = &at91rm9200_i2s[0],
- .num_modes = ARRAY_SIZE(at91rm9200_i2s),},
- },
- { .name = "at91rm9200-ssc1/i2s",
- .id = 1,
- .type = SND_SOC_DAI_I2S,
- .suspend = at91rm9200_i2s_suspend,
- .resume = at91rm9200_i2s_resume,
- .config_sysclk = at91rm9200_i2s_config_sysclk,
- .playback = {
- .channels_min = 1,
- .channels_max = 2,},
- .capture = {
- .channels_min = 1,
- .channels_max = 2,},
- .ops = {
- .startup = at91rm9200_i2s_startup,
- .shutdown = at91rm9200_i2s_shutdown,
- .prepare = at91rm9200_i2s_prepare,
- .hw_params = at91rm9200_i2s_hw_params,},
- .caps = {
- .mode = &at91rm9200_i2s[0],
- .num_modes = ARRAY_SIZE(at91rm9200_i2s),},
- },
- { .name = "at91rm9200-ssc2/i2s",
- .id = 2,
- .type = SND_SOC_DAI_I2S,
- .suspend = at91rm9200_i2s_suspend,
- .resume = at91rm9200_i2s_resume,
- .config_sysclk = at91rm9200_i2s_config_sysclk,
- .playback = {
- .channels_min = 1,
- .channels_max = 2,},
- .capture = {
- .channels_min = 1,
- .channels_max = 2,},
- .ops = {
- .startup = at91rm9200_i2s_startup,
- .shutdown = at91rm9200_i2s_shutdown,
- .prepare = at91rm9200_i2s_prepare,
- .hw_params = at91rm9200_i2s_hw_params,},
- .caps = {
- .mode = &at91rm9200_i2s[0],
- .num_modes = ARRAY_SIZE(at91rm9200_i2s),},
- },
-};
-
-EXPORT_SYMBOL_GPL(at91rm9200_i2s_dai);
-
-/* Module information */
-MODULE_AUTHOR("Frank Mandarino, fmandarino@endrelia.com, www.endrelia.com");
-MODULE_DESCRIPTION("AT91RM9200 I2S ASoC Interface");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * at91rm9200-pcm.c -- ALSA PCM interface for the Atmel AT91RM9200 chip.
- *
- * Author: Frank Mandarino <fmandarino@endrelia.com>
- * Endrelia Technologies Inc.
- * Created: Mar 3, 2006
- *
- * Based on pxa2xx-pcm.c by:
- *
- * Author: Nicolas Pitre
- * Created: Nov 30, 2004
- * Copyright: (C) 2004 MontaVista Software, Inc.
- *
- * 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.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/dma-mapping.h>
-
-#include <sound/driver.h>
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/soc.h>
-
-#include <asm/arch/at91rm9200.h>
-#include <asm/arch/at91rm9200_ssc.h>
-#include <asm/arch/at91rm9200_pdc.h>
-#include <asm/arch/hardware.h>
-
-#include "at91rm9200-pcm.h"
-
-#if 0
-#define DBG(x...) printk(KERN_INFO "at91rm9200-pcm: " x)
-#else
-#define DBG(x...)
-#endif
-
-static const snd_pcm_hardware_t at91rm9200_pcm_hardware = {
- .info = SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_PAUSE,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
- .period_bytes_min = 32,
- .period_bytes_max = 8192,
- .periods_min = 2,
- .periods_max = 1024,
- .buffer_bytes_max = 32 * 1024,
-};
-
-struct at91rm9200_runtime_data {
- at91rm9200_pcm_dma_params_t *params;
- dma_addr_t dma_buffer; /* physical address of dma buffer */
- dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
- size_t period_size;
- dma_addr_t period_ptr; /* physical address of next period */
- u32 pdc_xpr_save; /* PDC register save */
- u32 pdc_xcr_save;
- u32 pdc_xnpr_save;
- u32 pdc_xncr_save;
-};
-
-static void at91rm9200_pcm_dma_irq(u32 ssc_sr,
- struct snd_pcm_substream *substream)
-{
- struct at91rm9200_runtime_data *prtd = substream->runtime->private_data;
- at91rm9200_pcm_dma_params_t *params = prtd->params;
- static int count = 0;
-
- count++;
-
- if (ssc_sr & params->mask->ssc_endbuf) {
-
- printk(KERN_WARNING
- "at91rm9200-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
- substream->stream == SNDRV_PCM_STREAM_PLAYBACK
- ? "underrun" : "overrun",
- params->name, ssc_sr, count);
-
- /* re-start the PDC */
- at91_ssc_write(params->pdc->ptcr, params->mask->pdc_disable);
-
- prtd->period_ptr += prtd->period_size;
- if (prtd->period_ptr >= prtd->dma_buffer_end) {
- prtd->period_ptr = prtd->dma_buffer;
- }
-
- at91_ssc_write(params->pdc->xpr, prtd->period_ptr);
- at91_ssc_write(params->pdc->xcr,
- prtd->period_size / params->pdc_xfer_size);
-
- at91_ssc_write(params->pdc->ptcr, params->mask->pdc_enable);
- }
-
- if (ssc_sr & params->mask->ssc_endx) {
-
- /* Load the PDC next pointer and counter registers */
- prtd->period_ptr += prtd->period_size;
- if (prtd->period_ptr >= prtd->dma_buffer_end) {
- prtd->period_ptr = prtd->dma_buffer;
- }
- at91_ssc_write(params->pdc->xnpr, prtd->period_ptr);
- at91_ssc_write(params->pdc->xncr,
- prtd->period_size / params->pdc_xfer_size);
- }
-
- snd_pcm_period_elapsed(substream);
-}
-
-static int at91rm9200_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- snd_pcm_runtime_t *runtime = substream->runtime;
- struct at91rm9200_runtime_data *prtd = runtime->private_data;
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
-
- /* this may get called several times by oss emulation
- * with different params */
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
- runtime->dma_bytes = params_buffer_bytes(params);
-
- prtd->params = rtd->cpu_dai->dma_data;
- prtd->params->dma_intr_handler = at91rm9200_pcm_dma_irq;
-
- prtd->dma_buffer = runtime->dma_addr;
- prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
- prtd->period_size = params_period_bytes(params);
-
- DBG("hw_params: DMA for %s initialized (dma_bytes=%d, period_size=%d)\n",
- prtd->params->name, runtime->dma_bytes, prtd->period_size);
- return 0;
-}
-
-static int at91rm9200_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- struct at91rm9200_runtime_data *prtd = substream->runtime->private_data;
- at91rm9200_pcm_dma_params_t *params = prtd->params;
-
- if (params != NULL) {
- at91_ssc_write(params->pdc->ptcr, params->mask->pdc_disable);
- prtd->params->dma_intr_handler = NULL;
- }
-
- return 0;
-}
-
-static int at91rm9200_pcm_prepare(struct snd_pcm_substream *substream)
-{
- struct at91rm9200_runtime_data *prtd = substream->runtime->private_data;
- at91rm9200_pcm_dma_params_t *params = prtd->params;
-
- at91_ssc_write(params->ssc->idr,
- params->mask->ssc_endx | params->mask->ssc_endbuf);
-
- at91_ssc_write(params->pdc->ptcr, params->mask->pdc_disable);
- return 0;
-}
-
-static int at91rm9200_pcm_trigger(struct snd_pcm_substream *substream,
- int cmd)
-{
- struct at91rm9200_runtime_data *prtd = substream->runtime->private_data;
- at91rm9200_pcm_dma_params_t *params = prtd->params;
- int ret = 0;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- prtd->period_ptr = prtd->dma_buffer;
-
- at91_ssc_write(params->pdc->xpr, prtd->period_ptr);
- at91_ssc_write(params->pdc->xcr,
- prtd->period_size / params->pdc_xfer_size);
-
- prtd->period_ptr += prtd->period_size;
- at91_ssc_write(params->pdc->xnpr, prtd->period_ptr);
- at91_ssc_write(params->pdc->xncr,
- prtd->period_size / params->pdc_xfer_size);
-
- DBG("trigger: period_ptr=%lx, xpr=%lx, xcr=%ld, xnpr=%lx, xncr=%ld\n",
- (unsigned long) prtd->period_ptr,
- at91_ssc_read(params->pdc->xpr),
- at91_ssc_read(params->pdc->xcr),
- at91_ssc_read(params->pdc->xnpr),
- at91_ssc_read(params->pdc->xncr));
-
- at91_ssc_write(params->ssc->ier,
- params->mask->ssc_endx | params->mask->ssc_endbuf);
-
- at91_ssc_write(params->pdc->ptcr, params->mask->pdc_enable);
-
- DBG("sr=%lx imr=%lx\n", at91_ssc_read(params->ssc->ier - 4),
- at91_ssc_read(params->ssc->ier + 8));
- break;
-
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- at91_ssc_write(params->pdc->ptcr, params->mask->pdc_disable);
- break;
-
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- at91_ssc_write(params->pdc->ptcr, params->mask->pdc_enable);
- break;
-
- default:
- ret = -EINVAL;
- }
-
- return ret;
-}
-
-static snd_pcm_uframes_t at91rm9200_pcm_pointer(
- struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct at91rm9200_runtime_data *prtd = runtime->private_data;
- at91rm9200_pcm_dma_params_t *params = prtd->params;
- dma_addr_t ptr;
- snd_pcm_uframes_t x;
-
- ptr = (dma_addr_t) at91_ssc_read(params->pdc->xpr);
- x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
-
- if (x == runtime->buffer_size)
- x = 0;
- return x;
-}
-
-static int at91rm9200_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct at91rm9200_runtime_data *prtd;
- int ret = 0;
-
- snd_soc_set_runtime_hwparams(substream, &at91rm9200_pcm_hardware);
-
- /* ensure that buffer size is a multiple of period size */
- ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
- if (ret < 0)
- goto out;
-
- prtd = kzalloc(sizeof(struct at91rm9200_runtime_data), GFP_KERNEL);
- if (prtd == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- runtime->private_data = prtd;
-
- out:
- return ret;
-}
-
-static int at91rm9200_pcm_close(struct snd_pcm_substream *substream)
-{
- struct at91rm9200_runtime_data *prtd = substream->runtime->private_data;
-
- kfree(prtd);
- return 0;
-}
-
-static int at91rm9200_pcm_mmap(struct snd_pcm_substream *substream,
- struct vm_area_struct *vma)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
-
- return dma_mmap_writecombine(substream->pcm->card->dev, vma,
- runtime->dma_area,
- runtime->dma_addr,
- runtime->dma_bytes);
-}
-
-struct snd_pcm_ops at91rm9200_pcm_ops = {
- .open = at91rm9200_pcm_open,
- .close = at91rm9200_pcm_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = at91rm9200_pcm_hw_params,
- .hw_free = at91rm9200_pcm_hw_free,
- .prepare = at91rm9200_pcm_prepare,
- .trigger = at91rm9200_pcm_trigger,
- .pointer = at91rm9200_pcm_pointer,
- .mmap = at91rm9200_pcm_mmap,
-};
-
-static int at91rm9200_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
- int stream)
-{
- struct snd_pcm_substream *substream = pcm->streams[stream].substream;
- struct snd_dma_buffer *buf = &substream->dma_buffer;
- size_t size = at91rm9200_pcm_hardware.buffer_bytes_max;
-
- buf->dev.type = SNDRV_DMA_TYPE_DEV;
- buf->dev.dev = pcm->card->dev;
- buf->private_data = NULL;
- buf->area = dma_alloc_writecombine(pcm->card->dev, size,
- &buf->addr, GFP_KERNEL);
-
- DBG("preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
- (void *) buf->area,
- (void *) buf->addr,
- size);
-
- if (!buf->area)
- return -ENOMEM;
-
- buf->bytes = size;
- return 0;
-}
-
-static u64 at91rm9200_pcm_dmamask = 0xffffffff;
-
-static int at91rm9200_pcm_new(struct snd_card *card,
- struct snd_soc_codec_dai *dai, struct snd_pcm *pcm)
-{
- int ret = 0;
-
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &at91rm9200_pcm_dmamask;
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = 0xffffffff;
-
- if (dai->playback.channels_min) {
- ret = at91rm9200_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_PLAYBACK);
- if (ret)
- goto out;
- }
-
- if (dai->capture.channels_min) {
- ret = at91rm9200_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_CAPTURE);
- if (ret)
- goto out;
- }
- out:
- return ret;
-}
-
-static void at91rm9200_pcm_free_dma_buffers(struct snd_pcm *pcm)
-{
- struct snd_pcm_substream *substream;
- struct snd_dma_buffer *buf;
- int stream;
-
- for (stream = 0; stream < 2; stream++) {
- substream = pcm->streams[stream].substream;
- if (!substream)
- continue;
-
- buf = &substream->dma_buffer;
- if (!buf->area)
- continue;
-
- dma_free_writecombine(pcm->card->dev, buf->bytes,
- buf->area, buf->addr);
- buf->area = NULL;
- }
-}
-
-static int at91rm9200_pcm_suspend(struct platform_device *pdev,
- struct snd_soc_cpu_dai *dai)
-{
- struct snd_pcm_runtime *runtime = dai->runtime;
- struct at91rm9200_runtime_data *prtd;
- at91rm9200_pcm_dma_params_t *params;
-
- if (!runtime)
- return 0;
-
- prtd = runtime->private_data;
- params = prtd->params;
-
- /* disable the PDC and save the PDC registers */
-
- at91_ssc_write(params->pdc->ptcr, params->mask->pdc_disable);
-
- prtd->pdc_xpr_save = at91_ssc_read(params->pdc->xpr);
- prtd->pdc_xcr_save = at91_ssc_read(params->pdc->xcr);
- prtd->pdc_xnpr_save = at91_ssc_read(params->pdc->xnpr);
- prtd->pdc_xncr_save = at91_ssc_read(params->pdc->xncr);
-
- return 0;
-}
-
-static int at91rm9200_pcm_resume(struct platform_device *pdev,
- struct snd_soc_cpu_dai *dai)
-{
- struct snd_pcm_runtime *runtime = dai->runtime;
- struct at91rm9200_runtime_data *prtd;
- at91rm9200_pcm_dma_params_t *params;
-
- if (!runtime)
- return 0;
-
- prtd = runtime->private_data;
- params = prtd->params;
-
- /* restore the PDC registers and enable the PDC */
- at91_ssc_write(params->pdc->xpr, prtd->pdc_xpr_save);
- at91_ssc_write(params->pdc->xcr, prtd->pdc_xcr_save);
- at91_ssc_write(params->pdc->xnpr, prtd->pdc_xnpr_save);
- at91_ssc_write(params->pdc->xncr, prtd->pdc_xncr_save);
-
- at91_ssc_write(params->pdc->ptcr, params->mask->pdc_enable);
- return 0;
-}
-
-struct snd_soc_platform at91rm9200_soc_platform = {
- .name = "at91rm9200-audio",
- .pcm_ops = &at91rm9200_pcm_ops,
- .pcm_new = at91rm9200_pcm_new,
- .pcm_free = at91rm9200_pcm_free_dma_buffers,
- .suspend = at91rm9200_pcm_suspend,
- .resume = at91rm9200_pcm_resume,
-};
-
-EXPORT_SYMBOL_GPL(at91rm9200_soc_platform);
-
-MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>");
-MODULE_DESCRIPTION("Atmel AT91RM9200 PCM module");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * at91rm9200-pcm.h - ALSA PCM interface for the Atmel AT91RM9200 chip
- *
- * Author: Frank Mandarino <fmandarino@endrelia.com>
- * Endrelia Technologies Inc.
- * Created: Mar 3, 2006
- *
- * Based on pxa2xx-pcm.h by:
- *
- * Author: Nicolas Pitre
- * Created: Nov 30, 2004
- * Copyright: MontaVista Software, Inc.
- *
- * 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.
- */
-
-/*
- * Registers and status bits that are required by the PCM driver.
- */
-struct at91rm9200_ssc_regs {
- void __iomem *cr; /* SSC control */
- void __iomem *ier; /* SSC interrupt enable */
- void __iomem *idr; /* SSC interrupt disable */
-};
-
-struct at91rm9200_pdc_regs {
- void __iomem *xpr; /* PDC recv/trans pointer */
- void __iomem *xcr; /* PDC recv/trans counter */
- void __iomem *xnpr; /* PDC next recv/trans pointer */
- void __iomem *xncr; /* PDC next recv/trans counter */
- void __iomem *ptcr; /* PDC transfer control */
-};
-
-struct at91rm9200_ssc_mask {
- u32 ssc_enable; /* SSC recv/trans enable */
- u32 ssc_disable; /* SSC recv/trans disable */
- u32 ssc_endx; /* SSC ENDTX or ENDRX */
- u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */
- u32 pdc_enable; /* PDC recv/trans enable */
- u32 pdc_disable; /* PDC recv/trans disable */
-};
-
-
-/*
- * This structure, shared between the PCM driver and the interface,
- * contains all information required by the PCM driver to perform the
- * PDC DMA operation. All fields except dma_intr_handler() are initialized
- * by the interface. The dms_intr_handler() pointer is set by the PCM
- * driver and called by the interface SSC interrupt handler if it is
- * non-NULL.
- */
-typedef struct {
- char *name; /* stream identifier */
- int pdc_xfer_size; /* PDC counter increment in bytes */
- struct at91rm9200_ssc_regs *ssc; /* SSC register addresses */
- struct at91rm9200_pdc_regs *pdc; /* PDC receive/transmit registers */
- struct at91rm9200_ssc_mask *mask;/* SSC & PDC status bits */
- snd_pcm_substream_t *substream;
- void (*dma_intr_handler)(u32, snd_pcm_substream_t *);
-} at91rm9200_pcm_dma_params_t;
-
-extern struct snd_soc_cpu_dai at91rm9200_i2s_dai[3];
-extern struct snd_soc_platform at91rm9200_soc_platform;
-
-
-/*
- * SSC I/O helpers.
- * E.g., at91_ssc_write(AT91_SSC(1) + AT91_SSC_CR, AT91_SSC_RXEN);
- */
-#define AT91_SSC(x) (((x)==0) ? AT91_VA_BASE_SSC0 :\
- ((x)==1) ? AT91_VA_BASE_SSC1 : ((x)==2) ? AT91_VA_BASE_SSC2 : NULL)
-#define at91_ssc_read(a) ((unsigned long) __raw_readl(a))
-#define at91_ssc_write(a,v) __raw_writel((v),(a))
/*
- * eti_b1_wm8731 -- SoC audio for Endrelia ETI_B1.
+ * eti_b1_wm8731 -- SoC audio for AT91RM9200-based Endrelia ETI_B1 board.
*
* Author: Frank Mandarino <fmandarino@endrelia.com>
* Endrelia Technologies Inc.
#include <sound/soc.h>
#include <sound/soc-dapm.h>
-#include <asm/arch/at91rm9200.h>
-#include <asm/arch/gpio.h>
#include <asm/arch/hardware.h>
+#include <asm/arch/at91_pio.h>
+#include <asm/arch/gpio.h>
#include "../codecs/wm8731.h"
-#include "at91rm9200-pcm.h"
+#include "at91-pcm.h"
#if 0
#define DBG(x...) printk(KERN_INFO "eti_b1_wm8731:" x)
#define DBG(x...)
#endif
+#define AT91_PIO_TF1 (1 << (AT91_PIN_PB6 - PIN_BASE) % 32)
+#define AT91_PIO_TK1 (1 << (AT91_PIN_PB7 - PIN_BASE) % 32)
+#define AT91_PIO_TD1 (1 << (AT91_PIN_PB8 - PIN_BASE) % 32)
+#define AT91_PIO_RD1 (1 << (AT91_PIN_PB9 - PIN_BASE) % 32)
+#define AT91_PIO_RK1 (1 << (AT91_PIN_PB10 - PIN_BASE) % 32)
+#define AT91_PIO_RF1 (1 << (AT91_PIN_PB11 - PIN_BASE) % 32)
+
+
static struct clk *pck1_clk;
static struct clk *pllb_clk;
-static int eti_b1_startup(snd_pcm_substream_t *substream)
+static int eti_b1_startup(struct snd_pcm_substream *substream)
{
/* Start PCK1 clock. */
clk_enable(pck1_clk);
return 0;
}
-static void eti_b1_shutdown(snd_pcm_substream_t *substream)
+static void eti_b1_shutdown(struct snd_pcm_substream *substream)
{
/* Stop PCK1 clock. */
clk_disable(pck1_clk);
static struct snd_soc_dai_link eti_b1_dai = {
.name = "WM8731",
.stream_name = "WM8731",
- .cpu_dai = &at91rm9200_i2s_dai[1],
+ .cpu_dai = &at91_i2s_dai[1],
.codec_dai = &wm8731_dai,
.init = eti_b1_wm8731_init,
.config_sysclk = eti_b1_config_sysclk,
static struct snd_soc_device eti_b1_snd_devdata = {
.machine = &snd_soc_machine_eti_b1,
- .platform = &at91rm9200_soc_platform,
+ .platform = &at91_soc_platform,
.codec_dev = &soc_codec_dev_wm8731,
.codec_data = &eti_b1_wm8731_setup,
};
{
int ret;
u32 ssc_pio_lines;
+ struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;
+
+ if (!request_mem_region(AT91RM9200_BASE_SSC1, SZ_16K, "soc-audio")) {
+ DBG("SSC1 memory region is busy\n");
+ return -EBUSY;
+ }
+
+ ssc->base = ioremap(AT91RM9200_BASE_SSC1, SZ_16K);
+ if (!ssc->base) {
+ DBG("SSC1 memory ioremap failed\n");
+ ret = -ENOMEM;
+ goto fail_release_mem;
+ }
+
+ ssc->pid = AT91RM9200_ID_SSC1;
eti_b1_snd_device = platform_device_alloc("soc-audio", -1);
- if (!eti_b1_snd_device)
- return -ENOMEM;
+ if (!eti_b1_snd_device) {
+ DBG("platform device allocation failed\n");
+ ret = -ENOMEM;
+ goto fail_io_unmap;
+ }
platform_set_drvdata(eti_b1_snd_device, &eti_b1_snd_devdata);
eti_b1_snd_devdata.dev = &eti_b1_snd_device->dev;
ret = platform_device_add(eti_b1_snd_device);
if (ret) {
+ DBG("platform device add failed\n");
platform_device_put(eti_b1_snd_device);
- return ret;
+ goto fail_io_unmap;
}
- ssc_pio_lines = AT91_PB6_TF1 | AT91_PB7_TK1 | AT91_PB8_TD1
- | AT91_PB9_RD1 /* | AT91_PB10_RK1 | AT91_PB11_RF1 */;
+ ssc_pio_lines = AT91_PIO_TF1 | AT91_PIO_TK1 | AT91_PIO_TD1
+ | AT91_PIO_RD1 /* | AT91_PIO_RK1 | AT91_PIO_RF1 */;
/* Reset all PIO registers and assign lines to peripheral A */
at91_sys_write(AT91_PIOB + PIO_PDR, ssc_pio_lines);
at91_set_B_periph(AT91_PIN_PA24, 0);
return ret;
+
+fail_io_unmap:
+ iounmap(ssc->base);
+fail_release_mem:
+ release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
+ return ret;
}
static void __exit eti_b1_exit(void)
{
+ struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;
+
clk_put(pck1_clk);
clk_put(pllb_clk);
platform_device_unregister(eti_b1_snd_device);
+
+ iounmap(ssc->base);
+ release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
}
module_init(eti_b1_init);
projects / ~shefty / rdma-dev.git / commitdiff