[alsa-devel] [PATCH v3 2/5] ASoC: sirf: add I2S CPU DAI driver
RongJun Ying
rjying at gmail.com
Fri Jan 3 07:05:01 CET 2014
From: Rongjun Ying <Rongjun.Ying at csr.com>
This patch adds I2S DAI driver for SiRFprima2 and SiRFatlas6. The hardware supports:
I2S bus specification compliant (Released by Philips Semiconductors in June, 1996)
Supports I2S master and I2S slave mode
Provides MCLK to I2S CODEC in I2S master mode
Supports 16-bit resolution playback
Supports 16-bit resolution record
Supports 2 channel record
Supports 2 channel and 6 channel mode playback
Frame length, left channel length and right channel length are all programmable
Supports two DMA channels for TXFIFO and RXFIFO
Supports floating mode (x_ac97_dout can be configured as input)
headfile sound/soc/sirf/sirf-audio.h will be shard by all I2S and soc-inner
DAIs.
Signed-off-by: Rongjun Ying <Rongjun.Ying at csr.com>
---
-v3:
Calculated automatically the div vaule at runtime based on the sample rate
Move the master/slave mode setting from set_fmt to hw_parames
sound/soc/sirf/Kconfig | 3 +
sound/soc/sirf/Makefile | 2 +
sound/soc/sirf/sirf-audio.h | 268 ++++++++++++++++++++++++++
sound/soc/sirf/sirf-i2s.c | 435 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 708 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/sirf/sirf-audio.h
create mode 100644 sound/soc/sirf/sirf-i2s.c
diff --git a/sound/soc/sirf/Kconfig b/sound/soc/sirf/Kconfig
index 1637089..5064cfc 100644
--- a/sound/soc/sirf/Kconfig
+++ b/sound/soc/sirf/Kconfig
@@ -2,3 +2,6 @@ config SND_SIRF_SOC
tristate "Platform DMA driver for the SiRF SoC chips"
depends on ARCH_SIRF && SND_SOC
select SND_SOC_GENERIC_DMAENGINE_PCM
+
+config SND_SOC_SIRF_I2S
+ tristate
diff --git a/sound/soc/sirf/Makefile b/sound/soc/sirf/Makefile
index f268b83..9f754fe 100644
--- a/sound/soc/sirf/Makefile
+++ b/sound/soc/sirf/Makefile
@@ -1,3 +1,5 @@
snd-soc-sirf-objs := sirf-pcm.o
+snd-soc-sirf-i2s-objs := sirf-i2s.o
obj-$(CONFIG_SND_SIRF_SOC) += snd-soc-sirf.o
+obj-$(CONFIG_SND_SOC_SIRF_I2S) += snd-soc-sirf-i2s.o
diff --git a/sound/soc/sirf/sirf-audio.h b/sound/soc/sirf/sirf-audio.h
new file mode 100644
index 0000000..b6fdf06
--- /dev/null
+++ b/sound/soc/sirf/sirf-audio.h
@@ -0,0 +1,268 @@
+/*
+ * SiRF inner codec controllers define
+ *
+ * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
+ *
+ * Licensed under GPLv2 or later.
+ */
+
+#ifndef _SIRF_INNER_AUDIO_CTRL_H
+#define _SIRF_INNER_AUDIO_CTRL_H
+
+#define AUDIO_CTRL_TX_FIFO_LEVEL_CHECK_MASK 0x3F
+#define AUDIO_CTRL_TX_FIFO_SC_OFFSET 0
+#define AUDIO_CTRL_TX_FIFO_LC_OFFSET 10
+#define AUDIO_CTRL_TX_FIFO_HC_OFFSET 20
+
+#define TX_FIFO_SC(x) (((x) & AUDIO_CTRL_TX_FIFO_LEVEL_CHECK_MASK) \
+ << AUDIO_CTRL_TX_FIFO_SC_OFFSET)
+#define TX_FIFO_LC(x) (((x) & AUDIO_CTRL_TX_FIFO_LEVEL_CHECK_MASK) \
+ << AUDIO_CTRL_TX_FIFO_LC_OFFSET)
+#define TX_FIFO_HC(x) (((x) & AUDIO_CTRL_TX_FIFO_LEVEL_CHECK_MASK) \
+ << AUDIO_CTRL_TX_FIFO_HC_OFFSET)
+
+#define AUDIO_CTRL_RX_FIFO_LEVEL_CHECK_MASK 0x0F
+#define AUDIO_CTRL_RX_FIFO_SC_OFFSET 0
+#define AUDIO_CTRL_RX_FIFO_LC_OFFSET 10
+#define AUDIO_CTRL_RX_FIFO_HC_OFFSET 20
+
+#define RX_FIFO_SC(x) (((x) & AUDIO_CTRL_RX_FIFO_LEVEL_CHECK_MASK) \
+ << AUDIO_CTRL_RX_FIFO_SC_OFFSET)
+#define RX_FIFO_LC(x) (((x) & AUDIO_CTRL_RX_FIFO_LEVEL_CHECK_MASK) \
+ << AUDIO_CTRL_RX_FIFO_LC_OFFSET)
+#define RX_FIFO_HC(x) (((x) & AUDIO_CTRL_RX_FIFO_LEVEL_CHECK_MASK) \
+ << AUDIO_CTRL_RX_FIFO_HC_OFFSET)
+
+#define AUDIO_CTRL_MODE_SEL (0x0000)
+#define AUDIO_CTRL_AC97_CTRL (0x0004)
+#define AUDIO_CTRL_AC97_CMD (0x0008)
+#define AUDIO_CTRL_AC97_OP_STATUS (0x000C)
+#define AUDIO_CTRL_AC97_RD_CODEC_REG (0x0010)
+#define AUDIO_CTRL_TXSLOT_EN (0x0014)
+#define AUDIO_CTRL_RXSLOT_EN (0x0018)
+#define AUDIO_CTRL_AC97_AUX_SLOT_EN (0x001c)
+#define AUDIO_CTRL_I2S_CTRL (0x0020)
+#define AUDIO_CTRL_I2S_TX_RX_EN (0x0024)
+
+#define AUDIO_CTRL_EXT_TXFIFO1_OP (0x0040)
+#define AUDIO_CTRL_EXT_TXFIFO1_LEV_CHK (0x0044)
+#define AUDIO_CTRL_EXT_TXFIFO1_STS (0x0048)
+#define AUDIO_CTRL_EXT_TXFIFO1_INT (0x004C)
+#define AUDIO_CTRL_EXT_TXFIFO1_INT_MSK (0x0050)
+
+#define AUDIO_CTRL_EXT_TXFIFO2_OP (0x0054)
+#define AUDIO_CTRL_EXT_TXFIFO2_LEV_CHK (0x0058)
+#define AUDIO_CTRL_EXT_TXFIFO2_STS (0x005C)
+#define AUDIO_CTRL_EXT_TXFIFO2_INT (0x0060)
+#define AUDIO_CTRL_EXT_TXFIFO2_INT_MSK (0x0064)
+
+#define AUDIO_CTRL_EXT_TXFIFO3_OP (0x0068)
+#define AUDIO_CTRL_EXT_TXFIFO3_LEV_CHK (0x006C)
+#define AUDIO_CTRL_EXT_TXFIFO3_STS (0x0070)
+#define AUDIO_CTRL_EXT_TXFIFO3_INT (0x0074)
+#define AUDIO_CTRL_EXT_TXFIFO3_INT_MSK (0x0078)
+
+#define AUDIO_CTRL_EXT_TXFIFO4_OP (0x007C)
+#define AUDIO_CTRL_EXT_TXFIFO4_LEV_CHK (0x0080)
+#define AUDIO_CTRL_EXT_TXFIFO4_STS (0x0084)
+#define AUDIO_CTRL_EXT_TXFIFO4_INT (0x0088)
+#define AUDIO_CTRL_EXT_TXFIFO4_INT_MSK (0x008C)
+
+#define AUDIO_CTRL_EXT_TXFIFO5_OP (0x0090)
+#define AUDIO_CTRL_EXT_TXFIFO5_LEV_CHK (0x0094)
+#define AUDIO_CTRL_EXT_TXFIFO5_STS (0x0098)
+#define AUDIO_CTRL_EXT_TXFIFO5_INT (0x009C)
+#define AUDIO_CTRL_EXT_TXFIFO5_INT_MSK (0x00A0)
+
+#define AUDIO_CTRL_EXT_TXFIFO6_OP (0x00A4)
+#define AUDIO_CTRL_EXT_TXFIFO6_LEV_CHK (0x00A8)
+#define AUDIO_CTRL_EXT_TXFIFO6_STS (0x00AC)
+#define AUDIO_CTRL_EXT_TXFIFO6_INT (0x00B0)
+#define AUDIO_CTRL_EXT_TXFIFO6_INT_MSK (0x00B4)
+
+#define AUDIO_CTRL_RXFIFO_OP (0x00B8)
+#define AUDIO_CTRL_RXFIFO_LEV_CHK (0x00BC)
+#define AUDIO_CTRL_RXFIFO_STS (0x00C0)
+#define AUDIO_CTRL_RXFIFO_INT (0x00C4)
+#define AUDIO_CTRL_RXFIFO_INT_MSK (0x00C8)
+
+#define AUDIO_CTRL_AUXFIFO_OP (0x00CC)
+#define AUDIO_CTRL_AUXFIFO_LEV_CHK (0x00D0)
+#define AUDIO_CTRL_AUXFIFO_STS (0x00D4)
+#define AUDIO_CTRL_AUXFIFO_INT (0x00D8)
+#define AUDIO_CTRL_AUXFIFO_INT_MSK (0x00DC)
+
+#define AUDIO_IC_CODEC_PWR (0x00E0)
+#define AUDIO_IC_CODEC_CTRL0 (0x00E4)
+#define AUDIO_IC_CODEC_CTRL1 (0x00E8)
+#define AUDIO_IC_CODEC_CTRL2 (0x00EC)
+#define AUDIO_IC_CODEC_CTRL3 (0x00F0)
+
+#define AUDIO_CTRL_IC_CODEC_TX_CTRL (0x00F4)
+#define AUDIO_CTRL_IC_CODEC_RX_CTRL (0x00F8)
+
+#define AUDIO_CTRL_IC_TXFIFO_OP (0x00FC)
+#define AUDIO_CTRL_IC_TXFIFO_LEV_CHK (0x0100)
+#define AUDIO_CTRL_IC_TXFIFO_STS (0x0104)
+#define AUDIO_CTRL_IC_TXFIFO_INT (0x0108)
+#define AUDIO_CTRL_IC_TXFIFO_INT_MSK (0x010C)
+
+#define AUDIO_CTRL_IC_RXFIFO_OP (0x0110)
+#define AUDIO_CTRL_IC_RXFIFO_LEV_CHK (0x0114)
+#define AUDIO_CTRL_IC_RXFIFO_STS (0x0118)
+#define AUDIO_CTRL_IC_RXFIFO_INT (0x011C)
+#define AUDIO_CTRL_IC_RXFIFO_INT_MSK (0x0120)
+
+#define I2S_MODE (1<<0)
+#define AC97_TX_SLOT3_WIDTH_MASK (3<<1)
+#define AC97_TX_SLOT4_WIDTH_MASK (3<<3)
+#define AC97_TX_SLOT6_WIDTH_MASK (3<<5)
+#define AC97_TX_SLOT7_WIDTH_MASK (3<<7)
+#define AC97_TX_SLOT8_WIDTH_MASK (3<<9)
+#define AC97_TX_SLOT9_WIDTH_MASK (3<<11)
+#define AC97_FIFO_SYNC_MASK (3<<13)
+#define AC97_FIFO_SYNC_ALL (1<<13)
+
+#define SYNC_START (1<<0)
+#define AC97_START (1<<1)
+#define WARM_WAKEUP (1<<2)
+
+#define AC97_CMD_TYPE_MASK (1<<7)
+#define AC97_CMD_ADDR_MASK (0x7F)
+#define AC97_CMD_TYPE_WRITE (0<<7)
+#define AC97_CMD_TYPE_READ (1<<7)
+
+#define CMD_ISSUE_BIT (1<<0)
+#define RD_CMD_FINISH_BIT (1<<1)
+#define CODEC_READY_BIT (1<<2)
+
+#define AC97_RDBACK_ADDR_BITS (0x7F)
+#define AC97_RDBACK_DATA_BITS (0xFF<<16)
+
+#define AC97_TX_SLOT3_EN (1<<0)
+#define AC97_TX_SLOT4_EN (1<<1)
+#define AC97_TX_SLOT6_EN (1<<2)
+#define AC97_TX_SLOT7_EN (1<<3)
+#define AC97_TX_SLOT8_EN (1<<4)
+#define AC97_TX_SLOT9_EN (1<<5)
+
+#define AC97_RX_SLOT3_EN (1<<0)
+#define AC97_RX_SLOT4_EN (1<<1)
+#define AC97_RX_SLOT5_EN (1<<2)
+#define AC97_RX_SLOT6_EN (1<<3)
+#define AC97_RX_SLOT7_EN (1<<4)
+#define AC97_RX_SLOT8_EN (1<<5)
+#define AC97_RX_SLOT9_EN (1<<6)
+#define AC97_RX_SLOT10_EN (1<<7)
+#define AC97_RX_SLOT11_EN (1<<8)
+#define AC97_RX_SLOT12_EN (1<<9)
+
+#define AC97_AUX_SLOT3_EN (1<<0)
+#define AC97_AUX_SLOT4_EN (1<<1)
+#define AC97_AUX_SLOT5_EN (1<<2)
+#define AC97_AUX_SLOT6_EN (1<<3)
+#define AC97_AUX_SLOT7_EN (1<<4)
+#define AC97_AUX_SLOT8_EN (1<<5)
+#define AC97_AUX_SLOT9_EN (1<<6)
+#define AC97_AUX_SLOT10_EN (1<<7)
+#define AC97_AUX_SLOT11_EN (1<<8)
+#define AC97_AUX_SLOT12_EN (1<<9)
+
+#define I2S_LOOP_BACK (1<<3)
+#define I2S_MCLK_DIV_SHIFT 15
+#define I2S_MCLK_DIV_MASK (0x1FF<<I2S_MCLK_DIV_SHIFT)
+#define I2S_BITCLK_DIV_SHIFT 24
+#define I2S_BITCLK_DIV_MASK (0xFF<<I2S_BITCLK_DIV_SHIFT)
+
+#define I2S_MCLK_EN (1<<2)
+#define I2S_REF_CLK_SEL_EXT (1<<3)
+#define I2S_DOUT_OE (1<<4)
+#define i2s_R2X_LP_TO_TX0 (1<<30)
+#define i2s_R2X_LP_TO_TX1 (2<<30)
+#define i2s_R2X_LP_TO_TX2 (3<<30)
+
+#define AUDIO_FIFO_START (1 << 0)
+#define AUDIO_FIFO_RESET (1 << 1)
+
+#define AUDIO_FIFO_FULL (1 << 0)
+#define AUDIO_FIFO_EMPTY (1 << 1)
+#define AUDIO_FIFO_OFLOW (1 << 2)
+#define AUDIO_FIFO_UFLOW (1 << 3)
+
+#define I2S_RX_ENABLE (1 << 0)
+#define I2S_TX_ENABLE (1 << 1)
+
+/* Codec I2S Control Register defines */
+#define I2S_SLAVE_MODE (1 << 0)
+#define I2S_SIX_CHANNELS (1 << 1)
+#define I2S_L_CHAN_LEN_MASK (0x1f << 4)
+#define I2S_FRAME_LEN_MASK (0x3f << 9)
+
+#define AC97_WRITE_FRAME_VALID 0X10
+#define AC97_WRITE_SLOT1_VALID 0X08
+#define AC97_WRITE_SLOT2_VALID 0X04
+#define AC97_WRITE_SLOT3_VALID 0X02
+#define AC97_WRITE_SLOT4_VALID 0X01
+
+#define IC_TX_ENABLE (0x03)
+#define IC_RX_ENABLE (0x03)
+
+#define MICBIASEN (1 << 3)
+
+#define IC_RDACEN (1 << 0)
+#define IC_LDACEN (1 << 1)
+#define IC_HSREN (1 << 2)
+#define IC_HSLEN (1 << 3)
+#define IC_SPEN (1 << 4)
+#define IC_CPEN (1 << 5)
+
+#define IC_HPRSELR (1 << 6)
+#define IC_HPLSELR (1 << 7)
+#define IC_HPRSELL (1 << 8)
+#define IC_HPLSELL (1 << 9)
+#define IC_SPSELR (1 << 10)
+#define IC_SPSELL (1 << 11)
+
+#define IC_MONOR (1 << 12)
+#define IC_MONOL (1 << 13)
+
+#define IC_RXOSRSEL (1 << 28)
+#define IC_CPFREQ (1 << 29)
+#define IC_HSINVEN (1 << 30)
+
+#define IC_MICINREN (1 << 0)
+#define IC_MICINLEN (1 << 1)
+#define IC_MICIN1SEL (1 << 2)
+#define IC_MICIN2SEL (1 << 3)
+#define IC_MICDIFSEL (1 << 4)
+#define IC_LINEIN1SEL (1 << 5)
+#define IC_LINEIN2SEL (1 << 6)
+#define IC_RADCEN (1 << 7)
+#define IC_LADCEN (1 << 8)
+#define IC_ALM (1 << 9)
+
+#define IC_DIGMICEN (1 << 22)
+#define IC_DIGMICFREQ (1 << 23)
+#define IC_ADC14B_12 (1 << 24)
+#define IC_FIRDAC_HSL_EN (1 << 25)
+#define IC_FIRDAC_HSR_EN (1 << 26)
+#define IC_FIRDAC_LOUT_EN (1 << 27)
+#define IC_POR (1 << 28)
+#define IC_CODEC_CLK_EN (1 << 29)
+#define IC_HP_3DB_BOOST (1 << 30)
+
+#define IC_ADC_LEFT_GAIN_SHIFT 16
+#define IC_ADC_RIGHT_GAIN_SHIFT 10
+#define IC_ADC_GAIN_MASK 0x3F
+#define IC_MIC_MAX_GAIN 0x39
+
+#define IC_RXPGAR_MASK 0x3F
+#define IC_RXPGAR_SHIFT 14
+#define IC_RXPGAL_MASK 0x3F
+#define IC_RXPGAL_SHIFT 21
+#define IC_RXPGAR 0x7B
+#define IC_RXPGAL 0x7B
+
+#define SIRF_I2S_EXT_CLK 0x0
+#define SIRF_I2S_PWM_CLK 0x1
+#endif /*__SIRF_INNER_AUDIO_CTRL_H*/
diff --git a/sound/soc/sirf/sirf-i2s.c b/sound/soc/sirf/sirf-i2s.c
new file mode 100644
index 0000000..d8b8732
--- /dev/null
+++ b/sound/soc/sirf/sirf-i2s.c
@@ -0,0 +1,435 @@
+/*
+ * SiRF I2S driver
+ *
+ * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
+ *
+ * Licensed under GPLv2 or later.
+ */
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/pm_runtime.h>
+#include <linux/clk.h>
+
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "sirf-audio.h"
+
+struct sirf_i2s {
+ void __iomem *base;
+ struct clk *clk;
+ u32 i2s_ctrl;
+ u32 i2s_ctrl_tx_rx_en;
+ spinlock_t lock;
+ struct platform_device *sirf_pcm_pdev;
+ bool master;
+ int ext_clk;
+ int src_clk_rate;
+};
+
+static struct snd_dmaengine_dai_dma_data dma_data[2];
+
+static int sirf_i2s_dai_probe(struct snd_soc_dai *dai)
+{
+ dai->playback_dma_data = &dma_data[0];
+ dai->capture_dma_data = &dma_data[1];
+ return 0;
+}
+
+static int sirf_i2s_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct sirf_i2s *si2s = snd_soc_dai_get_drvdata(dai);
+ int playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ spin_lock(&si2s->lock);
+
+ if (playback) {
+ /* First start the FIFO, then enable the tx/rx */
+ writel(AUDIO_FIFO_RESET,
+ si2s->base + AUDIO_CTRL_EXT_TXFIFO1_OP);
+ writel(AUDIO_FIFO_START,
+ si2s->base + AUDIO_CTRL_EXT_TXFIFO1_OP);
+
+ writel(readl(si2s->base+AUDIO_CTRL_I2S_TX_RX_EN)
+ | I2S_TX_ENABLE | I2S_DOUT_OE,
+ si2s->base + AUDIO_CTRL_I2S_TX_RX_EN);
+
+ } else {
+ /* First start the FIFO, then enable the tx/rx */
+ writel(AUDIO_FIFO_RESET,
+ si2s->base + AUDIO_CTRL_RXFIFO_OP);
+ writel(AUDIO_FIFO_START,
+ si2s->base + AUDIO_CTRL_RXFIFO_OP);
+
+ writel(readl(si2s->base+AUDIO_CTRL_I2S_TX_RX_EN)
+ | I2S_RX_ENABLE,
+ si2s->base + AUDIO_CTRL_I2S_TX_RX_EN);
+ }
+
+ spin_unlock(&si2s->lock);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ spin_lock(&si2s->lock);
+
+ if (playback) {
+ writel(readl(si2s->base + AUDIO_CTRL_I2S_TX_RX_EN)
+ & ~(I2S_TX_ENABLE),
+ si2s->base + AUDIO_CTRL_I2S_TX_RX_EN);
+ /* First disable the tx/rx, then stop the FIFO */
+ writel(0, si2s->base + AUDIO_CTRL_EXT_TXFIFO1_OP);
+ } else {
+ writel(readl(si2s->base + AUDIO_CTRL_I2S_TX_RX_EN)
+ & ~(I2S_RX_ENABLE),
+ si2s->base+AUDIO_CTRL_I2S_TX_RX_EN);
+
+ /* First disable the tx/rx, then stop the FIFO */
+ writel(0, si2s->base + AUDIO_CTRL_RXFIFO_OP);
+ }
+
+ spin_unlock(&si2s->lock);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int sirf_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+ struct sirf_i2s *si2s = snd_soc_dai_get_drvdata(dai);
+ u32 i2s_ctrl = readl(si2s->base + AUDIO_CTRL_I2S_CTRL);
+ u32 i2s_tx_rx_ctrl = readl(si2s->base + AUDIO_CTRL_I2S_TX_RX_EN);
+ u32 left_len, frame_len;
+ int channels = params_channels(params);
+ u32 bitclk;
+ u32 bclk_div;
+ u32 div;
+
+ /*
+ * SiRFSoC I2S controller only support 2 and 6 channells output.
+ * I2S_SIX_CHANNELS bit clear: select 2 channels mode.
+ * I2S_SIX_CHANNELS bit set: select 6 channels mode.
+ */
+ switch (channels) {
+ case 2:
+ i2s_ctrl &= ~I2S_SIX_CHANNELS;
+ break;
+ case 6:
+ i2s_ctrl |= I2S_SIX_CHANNELS;
+ break;
+ default:
+ dev_err(dai->dev, "%d channels unsupported\n", channels);
+ return -EINVAL;
+ }
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ left_len = 8;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ left_len = 16;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ left_len = 24;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ left_len = 32;
+ break;
+ default:
+ dev_err(dai->dev, "Format unsupported\n");
+ return -EINVAL;
+ }
+
+ frame_len = left_len * 2;
+ i2s_ctrl &= ~(I2S_L_CHAN_LEN_MASK | I2S_FRAME_LEN_MASK);
+ /* Fill the actual len - 1 */
+ i2s_ctrl |= ((frame_len - 1) << 9) | ((left_len - 1) << 4)
+ | (0 << 15) | (3 << 24);
+
+ if (si2s->master) {
+ i2s_ctrl &= ~I2S_SLAVE_MODE;
+ i2s_tx_rx_ctrl |= I2S_MCLK_EN;
+ bitclk = params_rate(params) * frame_len;
+ div = si2s->src_clk_rate / bitclk;
+ /* MCLK divide-by-2 from source clk */
+ div /= 2;
+ bclk_div = div / 2 - 1;
+ i2s_ctrl |= (bclk_div << 24);
+ /*
+ * MCLK coefficient must set to 0, means
+ * divide-by-two from reference clock.
+ */
+ i2s_ctrl &= ~(((1 << 10) - 1) << 15);
+ } else {
+ i2s_ctrl |= I2S_SLAVE_MODE;
+ i2s_tx_rx_ctrl &= ~I2S_MCLK_EN;
+ }
+
+ if (si2s->ext_clk)
+ i2s_tx_rx_ctrl |= I2S_REF_CLK_SEL_EXT;
+ else
+ i2s_tx_rx_ctrl &= ~I2S_REF_CLK_SEL_EXT;
+
+ writel(i2s_ctrl, si2s->base + AUDIO_CTRL_I2S_CTRL);
+ writel(i2s_tx_rx_ctrl, si2s->base + AUDIO_CTRL_I2S_TX_RX_EN);
+ writel(readl(si2s->base + AUDIO_CTRL_MODE_SEL)
+ | I2S_MODE,
+ si2s->base + AUDIO_CTRL_MODE_SEL);
+
+ return 0;
+}
+
+static int sirf_i2s_set_dai_fmt(struct snd_soc_dai *dai,
+ unsigned int fmt)
+{
+ struct sirf_i2s *si2s = snd_soc_dai_get_drvdata(dai);
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ si2s->master = false;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ si2s->master = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* interface format */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ break;
+ default:
+ dev_err(dai->dev, "Only I2S format supported\n");
+ return -EINVAL;
+ }
+
+ /* clock inversion */
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ default:
+ dev_err(dai->dev, "Only normal bit clock, normal frame clock supported\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int sirf_i2s_set_clkdiv(struct snd_soc_dai *dai, int div_id, int src_rate)
+{
+ struct sirf_i2s *si2s = snd_soc_dai_get_drvdata(dai);
+
+ switch (div_id) {
+ case SIRF_I2S_EXT_CLK:
+ si2s->ext_clk = 1;
+ break;
+ case SIRF_I2S_PWM_CLK:
+ si2s->ext_clk = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ si2s->src_clk_rate = src_rate;
+ return 0;
+}
+
+struct snd_soc_dai_ops sirfsoc_i2s_dai_ops = {
+ .trigger = sirf_i2s_trigger,
+ .hw_params = sirf_i2s_hw_params,
+ .set_fmt = sirf_i2s_set_dai_fmt,
+ .set_clkdiv = sirf_i2s_set_clkdiv,
+};
+
+static struct snd_soc_dai_driver sirf_i2s_dai = {
+ .probe = sirf_i2s_dai_probe,
+ .name = "sirf-i2s",
+ .id = 0,
+ .playback = {
+ .stream_name = "SiRF I2S Playback",
+ .channels_min = 2,
+ .channels_max = 6,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .formats = SNDRV_PCM_FMTBIT_S8 |
+ SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .capture = {
+ .stream_name = "SiRF I2S Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .formats = SNDRV_PCM_FMTBIT_S8 |
+ SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .ops = &sirfsoc_i2s_dai_ops,
+};
+#ifdef CONFIG_PM_RUNTIME
+static int sirf_i2s_runtime_suspend(struct device *dev)
+{
+ struct sirf_i2s *si2s = dev_get_drvdata(dev);
+ clk_disable_unprepare(si2s->clk);
+
+ return 0;
+}
+
+static int sirf_i2s_runtime_resume(struct device *dev)
+{
+ struct sirf_i2s *si2s = dev_get_drvdata(dev);
+ int ret;
+ ret = clk_prepare_enable(si2s->clk);
+ if (ret)
+ return ret;
+ return ret;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int sirf_i2s_suspend(struct device *dev)
+{
+ struct sirf_i2s *si2s = dev_get_drvdata(dev);
+
+ if (!pm_runtime_status_suspended(dev)) {
+ si2s->i2s_ctrl = readl(si2s->base + AUDIO_CTRL_I2S_CTRL);
+ si2s->i2s_ctrl_tx_rx_en =
+ readl(si2s->base + AUDIO_CTRL_I2S_TX_RX_EN);
+ sirf_i2s_runtime_suspend(dev);
+ }
+ return 0;
+}
+
+static int sirf_i2s_resume(struct device *dev)
+{
+ struct sirf_i2s *si2s = dev_get_drvdata(dev);
+ int ret;
+ if (!pm_runtime_status_suspended(dev)) {
+ ret = sirf_i2s_runtime_resume(dev);
+ if (ret)
+ return ret;
+ writel(readl(si2s->base + AUDIO_CTRL_MODE_SEL)
+ | I2S_MODE,
+ si2s->base + AUDIO_CTRL_MODE_SEL);
+ writel(si2s->i2s_ctrl, si2s->base + AUDIO_CTRL_I2S_CTRL);
+ /*Restore MCLK enable and reference clock select bits.*/
+ writel(si2s->i2s_ctrl_tx_rx_en &
+ (I2S_MCLK_EN | I2S_REF_CLK_SEL_EXT),
+ si2s->base + AUDIO_CTRL_I2S_TX_RX_EN);
+
+ writel(0, si2s->base + AUDIO_CTRL_EXT_TXFIFO1_INT_MSK);
+ writel(0, si2s->base + AUDIO_CTRL_RXFIFO_INT_MSK);
+ }
+
+ return 0;
+}
+#endif
+
+static const struct snd_soc_component_driver sirf_i2s_component = {
+ .name = "sirf-i2s",
+};
+
+static int sirf_i2s_probe(struct platform_device *pdev)
+{
+ struct sirf_i2s *si2s;
+ int ret;
+ struct resource mem_res;
+
+ si2s = devm_kzalloc(&pdev->dev, sizeof(struct sirf_i2s),
+ GFP_KERNEL);
+ if (!si2s)
+ return -ENOMEM;
+
+ si2s->sirf_pcm_pdev = platform_device_register_simple("sirf-pcm-audio",
+ 0, NULL, 0);
+ if (IS_ERR(si2s->sirf_pcm_pdev))
+ return PTR_ERR(si2s->sirf_pcm_pdev);
+
+ platform_set_drvdata(pdev, si2s);
+
+ spin_lock_init(&si2s->lock);
+
+ dma_data[0].chan_name = "tx";
+ dma_data[1].chan_name = "rx";
+
+ ret = of_address_to_resource(pdev->dev.of_node, 0, &mem_res);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Unable to get i2s memory resource.\n");
+ return ret;
+ }
+ si2s->base = devm_ioremap(&pdev->dev, mem_res.start,
+ resource_size(&mem_res));
+ if (!si2s->base)
+ return -ENOMEM;
+
+ si2s->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(si2s->clk)) {
+ dev_err(&pdev->dev, "Get clock failed.\n");
+ ret = PTR_ERR(si2s->clk);
+ goto err;
+ }
+
+ pm_runtime_enable(&pdev->dev);
+
+ ret = devm_snd_soc_register_component(&pdev->dev, &sirf_i2s_component,
+ &sirf_i2s_dai, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "Register Audio SoC dai failed.\n");
+ goto err;
+ }
+
+ return 0;
+
+err:
+ return ret;
+}
+
+static int sirf_i2s_remove(struct platform_device *pdev)
+{
+ struct sirf_i2s *si2s = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(&pdev->dev);
+ platform_device_unregister(si2s->sirf_pcm_pdev);
+ return 0;
+}
+
+static const struct of_device_id sirf_i2s_of_match[] = {
+ { .compatible = "sirf,prima2-i2s", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, sirf_i2s_of_match);
+
+static const struct dev_pm_ops sirf_i2s_pm_ops = {
+ SET_RUNTIME_PM_OPS(sirf_i2s_runtime_suspend, sirf_i2s_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(sirf_i2s_suspend, sirf_i2s_resume)
+};
+
+static struct platform_driver sirf_i2s_driver = {
+ .driver = {
+ .name = "sirf-i2s",
+ .owner = THIS_MODULE,
+ .of_match_table = sirf_i2s_of_match,
+ .pm = &sirf_i2s_pm_ops,
+ },
+ .probe = sirf_i2s_probe,
+ .remove = sirf_i2s_remove,
+};
+
+module_platform_driver(sirf_i2s_driver);
+
+MODULE_DESCRIPTION("SiRF SoC I2S driver");
+MODULE_AUTHOR("RongJun Ying <Rongjun.Ying at csr.com>");
+MODULE_LICENSE("GPL v2");
--
1.7.5.4
More information about the Alsa-devel
mailing list