From 9f0ac6e1a8677ac509821f4ff0c77d39b1d63125 Mon Sep 17 00:00:00 2001 From: Frank Mandarino Date: Fri, 24 Nov 2006 15:49:39 +0100 Subject: [ALSA] Update AT91 ASoC driver for 2.6.19 kernel. 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 Signed-off-by: Liam Girdwood Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- sound/soc/at91/Makefile | 4 +- sound/soc/at91/at91-i2s.c | 673 +++++++++++++++++++++++++++++++++++++ sound/soc/at91/at91-pcm.c | 427 ++++++++++++++++++++++++ sound/soc/at91/at91-pcm.h | 71 ++++ sound/soc/at91/at91rm9200-i2s.c | 715 ---------------------------------------- sound/soc/at91/at91rm9200-pcm.c | 428 ------------------------ sound/soc/at91/at91rm9200-pcm.h | 75 ----- sound/soc/at91/eti_b1_wm8731.c | 64 +++- 8 files changed, 1224 insertions(+), 1233 deletions(-) create mode 100644 sound/soc/at91/at91-i2s.c create mode 100644 sound/soc/at91/at91-pcm.c create mode 100644 sound/soc/at91/at91-pcm.h delete mode 100644 sound/soc/at91/at91rm9200-i2s.c delete mode 100644 sound/soc/at91/at91rm9200-pcm.c delete mode 100644 sound/soc/at91/at91rm9200-pcm.h (limited to 'sound') diff --git a/sound/soc/at91/Makefile b/sound/soc/at91/Makefile index eb12ea2..b77b01a 100644 --- a/sound/soc/at91/Makefile +++ b/sound/soc/at91/Makefile @@ -1,6 +1,6 @@ # 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 diff --git a/sound/soc/at91/at91-i2s.c b/sound/soc/at91/at91-i2s.c new file mode 100644 index 0000000..b452e8e --- /dev/null +++ b/sound/soc/at91/at91-i2s.c @@ -0,0 +1,673 @@ +/* + * at91-i2s.c -- ALSA SoC I2S Audio Layer Platform driver + * + * Author: Frank Mandarino + * Endrelia Technologies Inc. + * + * Based on pxa2xx Platform drivers by + * Liam Girdwood + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#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.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.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"); diff --git a/sound/soc/at91/at91-pcm.c b/sound/soc/at91/at91-pcm.c new file mode 100644 index 0000000..fd9d732 --- /dev/null +++ b/sound/soc/at91/at91-pcm.c @@ -0,0 +1,427 @@ +/* + * at91-pcm.c -- ALSA PCM interface for the Atmel AT91 SoC + * + * Author: Frank Mandarino + * 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 +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include +#include +#include + +#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 "); +MODULE_DESCRIPTION("Atmel AT91 PCM module"); +MODULE_LICENSE("GPL"); diff --git a/sound/soc/at91/at91-pcm.h b/sound/soc/at91/at91-pcm.h new file mode 100644 index 0000000..6c3b095 --- /dev/null +++ b/sound/soc/at91/at91-pcm.h @@ -0,0 +1,71 @@ +/* + * at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC + * + * Author: Frank Mandarino + * 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 + +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)) diff --git a/sound/soc/at91/at91rm9200-i2s.c b/sound/soc/at91/at91rm9200-i2s.c deleted file mode 100644 index e3e6345..0000000 --- a/sound/soc/at91/at91rm9200-i2s.c +++ /dev/null @@ -1,715 +0,0 @@ -/* - * at91rm9200-i2s.c -- ALSA Soc Audio Layer Platform driver and DMA engine - * - * Author: Frank Mandarino - * Endrelia Technologies Inc. - * - * Based on pxa2xx Platform drivers by - * Liam Girdwood - * - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -#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<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<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"); diff --git a/sound/soc/at91/at91rm9200-pcm.c b/sound/soc/at91/at91rm9200-pcm.c deleted file mode 100644 index 237bc5f..0000000 --- a/sound/soc/at91/at91rm9200-pcm.c +++ /dev/null @@ -1,428 +0,0 @@ -/* - * at91rm9200-pcm.c -- ALSA PCM interface for the Atmel AT91RM9200 chip. - * - * Author: Frank Mandarino - * 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 -#include -#include -#include -#include - -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -#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 "); -MODULE_DESCRIPTION("Atmel AT91RM9200 PCM module"); -MODULE_LICENSE("GPL"); diff --git a/sound/soc/at91/at91rm9200-pcm.h b/sound/soc/at91/at91rm9200-pcm.h deleted file mode 100644 index 65468f1..0000000 --- a/sound/soc/at91/at91rm9200-pcm.h +++ /dev/null @@ -1,75 +0,0 @@ -/* - * at91rm9200-pcm.h - ALSA PCM interface for the Atmel AT91RM9200 chip - * - * Author: Frank Mandarino - * 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)) diff --git a/sound/soc/at91/eti_b1_wm8731.c b/sound/soc/at91/eti_b1_wm8731.c index d955cac..089cdc9 100644 --- a/sound/soc/at91/eti_b1_wm8731.c +++ b/sound/soc/at91/eti_b1_wm8731.c @@ -1,5 +1,5 @@ /* - * eti_b1_wm8731 -- SoC audio for Endrelia ETI_B1. + * eti_b1_wm8731 -- SoC audio for AT91RM9200-based Endrelia ETI_B1 board. * * Author: Frank Mandarino * Endrelia Technologies Inc. @@ -37,12 +37,12 @@ #include #include -#include -#include #include +#include +#include #include "../codecs/wm8731.h" -#include "at91rm9200-pcm.h" +#include "at91-pcm.h" #if 0 #define DBG(x...) printk(KERN_INFO "eti_b1_wm8731:" x) @@ -50,10 +50,18 @@ #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); @@ -62,7 +70,7 @@ static int eti_b1_startup(snd_pcm_substream_t *substream) 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); @@ -138,7 +146,7 @@ unsigned int eti_b1_config_sysclk(struct snd_soc_pcm_runtime *rtd, 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, @@ -157,7 +165,7 @@ static struct wm8731_setup_data eti_b1_wm8731_setup = { 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, }; @@ -168,22 +176,41 @@ static int __init eti_b1_init(void) { 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); @@ -211,14 +238,25 @@ static int __init eti_b1_init(void) 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); -- cgit v1.1