diff options
Diffstat (limited to 'sound/soc/imx/mxc-ssi.c')
| -rw-r--r-- | sound/soc/imx/mxc-ssi.c | 860 |
1 files changed, 860 insertions, 0 deletions
diff --git a/sound/soc/imx/mxc-ssi.c b/sound/soc/imx/mxc-ssi.c new file mode 100644 index 00000000000..ccdefe60e75 --- /dev/null +++ b/sound/soc/imx/mxc-ssi.c @@ -0,0 +1,860 @@ +/* + * mxc-ssi.c -- SSI driver for Freescale IMX + * + * Copyright 2006 Wolfson Microelectronics PLC. + * Author: Liam Girdwood + * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com + * + * Based on mxc-alsa-mc13783 (C) 2006 Freescale. + * + * 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. + * + * TODO: + * Need to rework SSI register defs when new defs go into mainline. + * Add support for TDM and FIFO 1. + * Add support for i.mx3x DMA interface. + * + */ + + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/dma-mapping.h> +#include <linux/clk.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <mach/dma-mx1-mx2.h> +#include <asm/mach-types.h> + +#include "mxc-ssi.h" +#include "mx1_mx2-pcm.h" + +#define SSI1_PORT 0 +#define SSI2_PORT 1 + +static int ssi_active[2] = {0, 0}; + +/* DMA information for mx1_mx2 platforms */ +static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_out0 = { + .name = "SSI1 PCM Stereo out 0", + .transfer_type = DMA_MODE_WRITE, + .per_address = SSI1_BASE_ADDR + STX0, + .event_id = DMA_REQ_SSI1_TX0, + .watermark_level = TXFIFO_WATERMARK, + .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO, + .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, +}; + +static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_out1 = { + .name = "SSI1 PCM Stereo out 1", + .transfer_type = DMA_MODE_WRITE, + .per_address = SSI1_BASE_ADDR + STX1, + .event_id = DMA_REQ_SSI1_TX1, + .watermark_level = TXFIFO_WATERMARK, + .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO, + .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, +}; + +static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_in0 = { + .name = "SSI1 PCM Stereo in 0", + .transfer_type = DMA_MODE_READ, + .per_address = SSI1_BASE_ADDR + SRX0, + .event_id = DMA_REQ_SSI1_RX0, + .watermark_level = RXFIFO_WATERMARK, + .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO, + .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, +}; + +static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_in1 = { + .name = "SSI1 PCM Stereo in 1", + .transfer_type = DMA_MODE_READ, + .per_address = SSI1_BASE_ADDR + SRX1, + .event_id = DMA_REQ_SSI1_RX1, + .watermark_level = RXFIFO_WATERMARK, + .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO, + .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, +}; + +static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_out0 = { + .name = "SSI2 PCM Stereo out 0", + .transfer_type = DMA_MODE_WRITE, + .per_address = SSI2_BASE_ADDR + STX0, + .event_id = DMA_REQ_SSI2_TX0, + .watermark_level = TXFIFO_WATERMARK, + .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO, + .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, +}; + +static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_out1 = { + .name = "SSI2 PCM Stereo out 1", + .transfer_type = DMA_MODE_WRITE, + .per_address = SSI2_BASE_ADDR + STX1, + .event_id = DMA_REQ_SSI2_TX1, + .watermark_level = TXFIFO_WATERMARK, + .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO, + .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, +}; + +static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_in0 = { + .name = "SSI2 PCM Stereo in 0", + .transfer_type = DMA_MODE_READ, + .per_address = SSI2_BASE_ADDR + SRX0, + .event_id = DMA_REQ_SSI2_RX0, + .watermark_level = RXFIFO_WATERMARK, + .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO, + .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, +}; + +static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_in1 = { + .name = "SSI2 PCM Stereo in 1", + .transfer_type = DMA_MODE_READ, + .per_address = SSI2_BASE_ADDR + SRX1, + .event_id = DMA_REQ_SSI2_RX1, + .watermark_level = RXFIFO_WATERMARK, + .per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO, + .mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, +}; + +static struct clk *ssi_clk0, *ssi_clk1; + +int get_ssi_clk(int ssi, struct device *dev) +{ + switch (ssi) { + case 0: + ssi_clk0 = clk_get(dev, "ssi1"); + if (IS_ERR(ssi_clk0)) + return PTR_ERR(ssi_clk0); + return 0; + case 1: + ssi_clk1 = clk_get(dev, "ssi2"); + if (IS_ERR(ssi_clk1)) + return PTR_ERR(ssi_clk1); + return 0; + default: + return -EINVAL; + } +} +EXPORT_SYMBOL(get_ssi_clk); + +void put_ssi_clk(int ssi) +{ + switch (ssi) { + case 0: + clk_put(ssi_clk0); + ssi_clk0 = NULL; + break; + case 1: + clk_put(ssi_clk1); + ssi_clk1 = NULL; + break; + } +} +EXPORT_SYMBOL(put_ssi_clk); + +/* + * SSI system clock configuration. + * Should only be called when port is inactive (i.e. SSIEN = 0). + */ +static int imx_ssi_set_dai_sysclk(struct snd_soc_dai *cpu_dai, + int clk_id, unsigned int freq, int dir) +{ + u32 scr; + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + scr = SSI1_SCR; + pr_debug("%s: SCR for SSI1 is %x\n", __func__, scr); + } else { + scr = SSI2_SCR; + pr_debug("%s: SCR for SSI2 is %x\n", __func__, scr); + } + + if (scr & SSI_SCR_SSIEN) { + printk(KERN_WARNING "Warning ssi already enabled\n"); + return 0; + } + + switch (clk_id) { + case IMX_SSP_SYS_CLK: + if (dir == SND_SOC_CLOCK_OUT) { + scr |= SSI_SCR_SYS_CLK_EN; + pr_debug("%s: clk of is output\n", __func__); + } else { + scr &= ~SSI_SCR_SYS_CLK_EN; + pr_debug("%s: clk of is input\n", __func__); + } + break; + default: + return -EINVAL; + } + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + pr_debug("%s: writeback of SSI1_SCR\n", __func__); + SSI1_SCR = scr; + } else { + pr_debug("%s: writeback of SSI2_SCR\n", __func__); + SSI2_SCR = scr; + } + + return 0; +} + +/* + * SSI Clock dividers + * Should only be called when port is inactive (i.e. SSIEN = 0). + */ +static int imx_ssi_set_dai_clkdiv(struct snd_soc_dai *cpu_dai, + int div_id, int div) +{ + u32 stccr, srccr; + + pr_debug("%s\n", __func__); + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + if (SSI1_SCR & SSI_SCR_SSIEN) + return 0; + srccr = SSI1_STCCR; + stccr = SSI1_STCCR; + } else { + if (SSI2_SCR & SSI_SCR_SSIEN) + return 0; + srccr = SSI2_STCCR; + stccr = SSI2_STCCR; + } + + switch (div_id) { + case IMX_SSI_TX_DIV_2: + stccr &= ~SSI_STCCR_DIV2; + stccr |= div; + break; + case IMX_SSI_TX_DIV_PSR: + stccr &= ~SSI_STCCR_PSR; + stccr |= div; + break; + case IMX_SSI_TX_DIV_PM: + stccr &= ~0xff; + stccr |= SSI_STCCR_PM(div); + break; + case IMX_SSI_RX_DIV_2: + stccr &= ~SSI_STCCR_DIV2; + stccr |= div; + break; + case IMX_SSI_RX_DIV_PSR: + stccr &= ~SSI_STCCR_PSR; + stccr |= div; + break; + case IMX_SSI_RX_DIV_PM: + stccr &= ~0xff; + stccr |= SSI_STCCR_PM(div); + break; + default: + return -EINVAL; + } + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + SSI1_STCCR = stccr; + SSI1_SRCCR = srccr; + } else { + SSI2_STCCR = stccr; + SSI2_SRCCR = srccr; + } + return 0; +} + +/* + * SSI Network Mode or TDM slots configuration. + * Should only be called when port is inactive (i.e. SSIEN = 0). + */ +static int imx_ssi_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, + unsigned int mask, int slots) +{ + u32 stmsk, srmsk, stccr; + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + if (SSI1_SCR & SSI_SCR_SSIEN) { + printk(KERN_WARNING "Warning ssi already enabled\n"); + return 0; + } + stccr = SSI1_STCCR; + } else { + if (SSI2_SCR & SSI_SCR_SSIEN) { + printk(KERN_WARNING "Warning ssi already enabled\n"); + return 0; + } + stccr = SSI2_STCCR; + } + + stmsk = srmsk = mask; + stccr &= ~SSI_STCCR_DC_MASK; + stccr |= SSI_STCCR_DC(slots - 1); + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + SSI1_STMSK = stmsk; + SSI1_SRMSK = srmsk; + SSI1_SRCCR = SSI1_STCCR = stccr; + } else { + SSI2_STMSK = stmsk; + SSI2_SRMSK = srmsk; + SSI2_SRCCR = SSI2_STCCR = stccr; + } + + return 0; +} + +/* + * SSI DAI format configuration. + * Should only be called when port is inactive (i.e. SSIEN = 0). + * Note: We don't use the I2S modes but instead manually configure the + * SSI for I2S. + */ +static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, + unsigned int fmt) +{ + u32 stcr = 0, srcr = 0, scr; + + /* + * This is done to avoid this function to modify + * previous set values in stcr + */ + stcr = SSI1_STCR; + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) + scr = SSI1_SCR & ~(SSI_SCR_SYN | SSI_SCR_NET); + else + scr = SSI2_SCR & ~(SSI_SCR_SYN | SSI_SCR_NET); + + if (scr & SSI_SCR_SSIEN) { + printk(KERN_WARNING "Warning ssi already enabled\n"); + return 0; + } + + /* DAI mode */ + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_I2S: + /* data on rising edge of bclk, frame low 1clk before data */ + stcr |= SSI_STCR_TFSI | SSI_STCR_TEFS | SSI_STCR_TXBIT0; + srcr |= SSI_SRCR_RFSI | SSI_SRCR_REFS | SSI_SRCR_RXBIT0; + break; + case SND_SOC_DAIFMT_LEFT_J: + /* data on rising edge of bclk, frame high with data */ + stcr |= SSI_STCR_TXBIT0; + srcr |= SSI_SRCR_RXBIT0; + break; + case SND_SOC_DAIFMT_DSP_B: + /* data on rising edge of bclk, frame high with data */ + stcr |= SSI_STCR_TFSL; + srcr |= SSI_SRCR_RFSL; + break; + case SND_SOC_DAIFMT_DSP_A: + /* data on rising edge of bclk, frame high 1clk before data */ + stcr |= SSI_STCR_TFSL | SSI_STCR_TEFS; + srcr |= SSI_SRCR_RFSL | SSI_SRCR_REFS; + break; + } + + /* DAI clock inversion */ + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_IB_IF: + stcr |= SSI_STCR_TFSI; + stcr &= ~SSI_STCR_TSCKP; + srcr |= SSI_SRCR_RFSI; + srcr &= ~SSI_SRCR_RSCKP; + break; + case SND_SOC_DAIFMT_IB_NF: + stcr &= ~(SSI_STCR_TSCKP | SSI_STCR_TFSI); + srcr &= ~(SSI_SRCR_RSCKP | SSI_SRCR_RFSI); + break; + case SND_SOC_DAIFMT_NB_IF: + stcr |= SSI_STCR_TFSI | SSI_STCR_TSCKP; + srcr |= SSI_SRCR_RFSI | SSI_SRCR_RSCKP; + break; + case SND_SOC_DAIFMT_NB_NF: + stcr &= ~SSI_STCR_TFSI; + stcr |= SSI_STCR_TSCKP; + srcr &= ~SSI_SRCR_RFSI; + srcr |= SSI_SRCR_RSCKP; + break; + } + + /* DAI clock master masks */ + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { + case SND_SOC_DAIFMT_CBS_CFS: + stcr |= SSI_STCR_TFDIR | SSI_STCR_TXDIR; + srcr |= SSI_SRCR_RFDIR | SSI_SRCR_RXDIR; + break; + case SND_SOC_DAIFMT_CBM_CFS: + stcr |= SSI_STCR_TFDIR; + srcr |= SSI_SRCR_RFDIR; + break; + case SND_SOC_DAIFMT_CBS_CFM: + stcr |= SSI_STCR_TXDIR; + srcr |= SSI_SRCR_RXDIR; + break; + } + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + SSI1_STCR = stcr; + SSI1_SRCR = srcr; + SSI1_SCR = scr; + } else { + SSI2_STCR = stcr; + SSI2_SRCR = srcr; + SSI2_SCR = scr; + } + + return 0; +} + +static int imx_ssi_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + /* set up TX DMA params */ + switch (cpu_dai->id) { + case IMX_DAI_SSI0: + cpu_dai->dma_data = &imx_ssi1_pcm_stereo_out0; + break; + case IMX_DAI_SSI1: + cpu_dai->dma_data = &imx_ssi1_pcm_stereo_out1; + break; + case IMX_DAI_SSI2: + cpu_dai->dma_data = &imx_ssi2_pcm_stereo_out0; + break; + case IMX_DAI_SSI3: + cpu_dai->dma_data = &imx_ssi2_pcm_stereo_out1; + } + pr_debug("%s: (playback)\n", __func__); + } else { + /* set up RX DMA params */ + switch (cpu_dai->id) { + case IMX_DAI_SSI0: + cpu_dai->dma_data = &imx_ssi1_pcm_stereo_in0; + break; + case IMX_DAI_SSI1: + cpu_dai->dma_data = &imx_ssi1_pcm_stereo_in1; + break; + case IMX_DAI_SSI2: + cpu_dai->dma_data = &imx_ssi2_pcm_stereo_in0; + break; + case IMX_DAI_SSI3: + cpu_dai->dma_data = &imx_ssi2_pcm_stereo_in1; + } + pr_debug("%s: (capture)\n", __func__); + } + + /* + * we cant really change any SSI values after SSI is enabled + * need to fix in software for max flexibility - lrg + */ + if (cpu_dai->active) { + printk(KERN_WARNING "Warning ssi already enabled\n"); + return 0; + } + + /* reset the SSI port - Sect 45.4.4 */ + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + + if (!ssi_clk0) + return -EINVAL; + + if (ssi_active[SSI1_PORT]++) { + pr_debug("%s: exit before reset\n", __func__); + return 0; + } + + /* SSI1 Reset */ + SSI1_SCR = 0; + + SSI1_SFCSR = SSI_SFCSR_RFWM1(RXFIFO_WATERMARK) | + SSI_SFCSR_RFWM0(RXFIFO_WATERMARK) | + SSI_SFCSR_TFWM1(TXFIFO_WATERMARK) | + SSI_SFCSR_TFWM0(TXFIFO_WATERMARK); + } else { + + if (!ssi_clk1) + return -EINVAL; + + if (ssi_active[SSI2_PORT]++) { + pr_debug("%s: exit before reset\n", __func__); + return 0; + } + + /* SSI2 Reset */ + SSI2_SCR = 0; + + SSI2_SFCSR = SSI_SFCSR_RFWM1(RXFIFO_WATERMARK) | + SSI_SFCSR_RFWM0(RXFIFO_WATERMARK) | + SSI_SFCSR_TFWM1(TXFIFO_WATERMARK) | + SSI_SFCSR_TFWM0(TXFIFO_WATERMARK); + } + + return 0; +} + +int imx_ssi_hw_tx_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; + u32 stccr, stcr, sier; + + pr_debug("%s\n", __func__); + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + stccr = SSI1_STCCR & ~SSI_STCCR_WL_MASK; + stcr = SSI1_STCR; + sier = SSI1_SIER; + } else { + stccr = SSI2_STCCR & ~SSI_STCCR_WL_MASK; + stcr = SSI2_STCR; + sier = SSI2_SIER; + } + + /* DAI data (word) size */ + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + stccr |= SSI_STCCR_WL(16); + break; + case SNDRV_PCM_FORMAT_S20_3LE: + stccr |= SSI_STCCR_WL(20); + break; + case SNDRV_PCM_FORMAT_S24_LE: + stccr |= SSI_STCCR_WL(24); + break; + } + + /* enable interrupts */ + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) + stcr |= SSI_STCR_TFEN0; + else + stcr |= SSI_STCR_TFEN1; + sier |= SSI_SIER_TDMAE; + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + SSI1_STCR = stcr; + SSI1_STCCR = stccr; + SSI1_SIER = sier; + } else { + SSI2_STCR = stcr; + SSI2_STCCR = stccr; + SSI2_SIER = sier; + } + + return 0; +} + +int imx_ssi_hw_rx_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; + u32 srccr, srcr, sier; + + pr_debug("%s\n", __func__); + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + srccr = SSI1_SRCCR & ~SSI_SRCCR_WL_MASK; + srcr = SSI1_SRCR; + sier = SSI1_SIER; + } else { + srccr = SSI2_SRCCR & ~SSI_SRCCR_WL_MASK; + srcr = SSI2_SRCR; + sier = SSI2_SIER; + } + + /* DAI data (word) size */ + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + srccr |= SSI_SRCCR_WL(16); + break; + case SNDRV_PCM_FORMAT_S20_3LE: + srccr |= SSI_SRCCR_WL(20); + break; + case SNDRV_PCM_FORMAT_S24_LE: + srccr |= SSI_SRCCR_WL(24); + break; + } + + /* enable interrupts */ + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) + srcr |= SSI_SRCR_RFEN0; + else + srcr |= SSI_SRCR_RFEN1; + sier |= SSI_SIER_RDMAE; + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + SSI1_SRCR = srcr; + SSI1_SRCCR = srccr; + SSI1_SIER = sier; + } else { + SSI2_SRCR = srcr; + SSI2_SRCCR = srccr; + SSI2_SIER = sier; + } + + return 0; +} + +/* + * Should only be called when port is inactive (i.e. SSIEN = 0), + * although can be called multiple times by upper layers. + */ +int imx_ssi_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; + + int ret; + + /* cant change any parameters when SSI is running */ + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + if (SSI1_SCR & SSI_SCR_SSIEN) { + printk(KERN_WARNING "Warning ssi already enabled\n"); + return 0; + } + } else { + if (SSI2_SCR & SSI_SCR_SSIEN) { + printk(KERN_WARNING "Warning ssi already enabled\n"); + return 0; + } + } + + /* + * Configure both tx and rx params with the same settings. This is + * really a harware restriction because SSI must be disabled until + * we can change those values. If there is an active audio stream in + * one direction, enabling the other direction with different + * settings would mean disturbing the running one. + */ + ret = imx_ssi_hw_tx_params(substream, params); + if (ret < 0) + return ret; + return imx_ssi_hw_rx_params(substream, params); +} + +int imx_ssi_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; + int ret; + + pr_debug("%s\n", __func__); + + /* Enable clks here to follow SSI recommended init sequence */ + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) { + ret = clk_enable(ssi_clk0); + if (ret < 0) + printk(KERN_ERR "Unable to enable ssi_clk0\n"); + } else { + ret = clk_enable(ssi_clk1); + if (ret < 0) + printk(KERN_ERR "Unable to enable ssi_clk1\n"); + } + + return 0; +} + +static int imx_ssi_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; + u32 scr; + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) + scr = SSI1_SCR; + else + scr = SSI2_SCR; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + scr |= SSI_SCR_TE | SSI_SCR_SSIEN; + else + scr |= SSI_SCR_RE | SSI_SCR_SSIEN; + break; + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + scr &= ~SSI_SCR_TE; + else + scr &= ~SSI_SCR_RE; + break; + default: + return -EINVAL; + } + + if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) + SSI1_SCR = scr; + else + SSI2_SCR = scr; + + return 0; +} + +static void imx_ssi_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; + + /* shutdown SSI if neither Tx or Rx is active */ + if (!cpu_dai->active) { + + if (cpu_dai->id == IMX_DAI_SSI0 || + cpu_dai->id == IMX_DAI_SSI2) { + + if (--ssi_active[SSI1_PORT] > 1) + return; + + SSI1_SCR = 0; + clk_disable(ssi_clk0); + } else { + if (--ssi_active[SSI2_PORT]) + return; + SSI2_SCR = 0; + clk_disable(ssi_clk1); + } + } +} + +#ifdef CONFIG_PM +static int imx_ssi_suspend(struct platform_device *dev, + struct snd_soc_dai *dai) +{ + return 0; +} + +static int imx_ssi_resume(struct platform_device *pdev, + struct snd_soc_dai *dai) +{ + return 0; +} + +#else +#define imx_ssi_suspend NULL +#define imx_ssi_resume NULL +#endif + +#define IMX_SSI_RATES \ + (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | \ + SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \ + SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ + SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \ + SNDRV_PCM_RATE_96000) + +#define IMX_SSI_BITS \ + (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \ + SNDRV_PCM_FMTBIT_S24_LE) + +static struct snd_soc_dai_ops imx_ssi_pcm_dai_ops = { + .startup = imx_ssi_startup, + .shutdown = imx_ssi_shutdown, + .trigger = imx_ssi_trigger, + .prepare = imx_ssi_prepare, + .hw_params = imx_ssi_hw_params, + .set_sysclk = imx_ssi_set_dai_sysclk, + .set_clkdiv = imx_ssi_set_dai_clkdiv, + .set_fmt = imx_ssi_set_dai_fmt, + .set_tdm_slot = imx_ssi_set_dai_tdm_slot, +}; + +struct snd_soc_dai imx_ssi_pcm_dai[] = { +{ + .name = "imx-i2s-1-0", + .id = IMX_DAI_SSI0, + .suspend = imx_ssi_suspend, + .resume = imx_ssi_resume, + .playback = { + .channels_min = 1, + .channels_max = 2, + .formats = IMX_SSI_BITS, + .rates = IMX_SSI_RATES,}, + .capture = { + .channels_min = 1, + .channels_max = 2, + .formats = IMX_SSI_BITS, + .rates = IMX_SSI_RATES,}, + .ops = &imx_ssi_pcm_dai_ops, +}, +{ + .name = "imx-i2s-2-0", + .id = IMX_DAI_SSI1, + .playback = { + .channels_min = 1, + .channels_max = 2, + .formats = IMX_SSI_BITS, + .rates = IMX_SSI_RATES,}, + .capture = { + .channels_min = 1, + .channels_max = 2, + .formats = IMX_SSI_BITS, + .rates = IMX_SSI_RATES,}, + .ops = &imx_ssi_pcm_dai_ops, +}, +{ + .name = "imx-i2s-1-1", + .id = IMX_DAI_SSI2, + .suspend = imx_ssi_suspend, + .resume = imx_ssi_resume, + .playback = { + .channels_min = 1, + .channels_max = 2, + .formats = IMX_SSI_BITS, + .rates = IMX_SSI_RATES,}, + .capture = { + .channels_min = 1, + .channels_max = 2, + .formats = IMX_SSI_BITS, + .rates = IMX_SSI_RATES,}, + .ops = &imx_ssi_pcm_dai_ops, +}, +{ + .name = "imx-i2s-2-1", + .id = IMX_DAI_SSI3, + .playback = { + .channels_min = 1, + .channels_max = 2, + .formats = IMX_SSI_BITS, + .rates = IMX_SSI_RATES,}, + .capture = { + .channels_min = 1, + .channels_max = 2, + .formats = IMX_SSI_BITS, + .rates = IMX_SSI_RATES,}, + .ops = &imx_ssi_pcm_dai_ops, +}, +}; +EXPORT_SYMBOL_GPL(imx_ssi_pcm_dai); + +static int __init imx_ssi_init(void) +{ + return snd_soc_register_dais(imx_ssi_pcm_dai, + ARRAY_SIZE(imx_ssi_pcm_dai)); +} + +static void __exit imx_ssi_exit(void) +{ + snd_soc_unregister_dais(imx_ssi_pcm_dai, + ARRAY_SIZE(imx_ssi_pcm_dai)); +} + +module_init(imx_ssi_init); +module_exit(imx_ssi_exit); +MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com"); +MODULE_DESCRIPTION("i.MX ASoC I2S driver"); +MODULE_LICENSE("GPL"); |