diff options
| -rw-r--r-- | sound/soc/imx/Kconfig | 2 | ||||
| -rw-r--r-- | sound/soc/imx/Makefile | 2 | ||||
| -rw-r--r-- | sound/soc/imx/mxc-ssi.c | 868 | ||||
| -rw-r--r-- | sound/soc/imx/mxc-ssi.h | 238 |
4 files changed, 1110 insertions, 0 deletions
diff --git a/sound/soc/imx/Kconfig b/sound/soc/imx/Kconfig index a1bf053..886dadd 100644 --- a/sound/soc/imx/Kconfig +++ b/sound/soc/imx/Kconfig @@ -6,6 +6,8 @@ config SND_MX1_MX2_SOC Say Y or M if you want to add support for codecs attached to the MX1 or MX2 SSI interface. +config SND_MXC_SOC_SSI + tristate diff --git a/sound/soc/imx/Makefile b/sound/soc/imx/Makefile index c390f0f..6552cb2 100644 --- a/sound/soc/imx/Makefile +++ b/sound/soc/imx/Makefile @@ -1,4 +1,6 @@ # i.MX Platform Support snd-soc-mx1_mx2-objs := mx1_mx2-pcm.o +snd-soc-mxc-ssi-objs := mxc-ssi.o obj-$(CONFIG_SND_MX1_MX2_SOC) += snd-soc-mx1_mx2.o +obj-$(CONFIG_SND_MXC_SOC_SSI) += snd-soc-mxc-ssi.o diff --git a/sound/soc/imx/mxc-ssi.c b/sound/soc/imx/mxc-ssi.c new file mode 100644 index 0000000..3806ff2 --- /dev/null +++ b/sound/soc/imx/mxc-ssi.c @@ -0,0 +1,868 @@ +/* + * 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; + } + + /* sync */ + if (!(fmt & SND_SOC_DAIFMT_ASYNC)) + scr |= SSI_SCR_SYN; + + /* tdm - only for stereo atm */ + if (fmt & SND_SOC_DAIFMT_TDM) + scr |= SSI_SCR_NET; + + 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"); diff --git a/sound/soc/imx/mxc-ssi.h b/sound/soc/imx/mxc-ssi.h new file mode 100644 index 0000000..12bbdc9 --- /dev/null +++ b/sound/soc/imx/mxc-ssi.h @@ -0,0 +1,238 @@ +/* + * 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. + */ + +#ifndef _IMX_SSI_H +#define _IMX_SSI_H + +#include <mach/hardware.h> + +/* SSI regs definition - MOVE to /arch/arm/plat-mxc/include/mach/ when stable */ +#define SSI1_IO_BASE_ADDR IO_ADDRESS(SSI1_BASE_ADDR) +#define SSI2_IO_BASE_ADDR IO_ADDRESS(SSI2_BASE_ADDR) + +#define STX0 0x00 +#define STX1 0x04 +#define SRX0 0x08 +#define SRX1 0x0c +#define SCR 0x10 +#define SISR 0x14 +#define SIER 0x18 +#define STCR 0x1c +#define SRCR 0x20 +#define STCCR 0x24 +#define SRCCR 0x28 +#define SFCSR 0x2c +#define STR 0x30 +#define SOR 0x34 +#define SACNT 0x38 +#define SACADD 0x3c +#define SACDAT 0x40 +#define SATAG 0x44 +#define STMSK 0x48 +#define SRMSK 0x4c + +#define SSI1_STX0 (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STX0))) +#define SSI1_STX1 (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STX1))) +#define SSI1_SRX0 (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SRX0))) +#define SSI1_SRX1 (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SRX1))) +#define SSI1_SCR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SCR))) +#define SSI1_SISR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SISR))) +#define SSI1_SIER (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SIER))) +#define SSI1_STCR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STCR))) +#define SSI1_SRCR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SRCR))) +#define SSI1_STCCR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STCCR))) +#define SSI1_SRCCR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SRCCR))) +#define SSI1_SFCSR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SFCSR))) +#define SSI1_STR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STR))) +#define SSI1_SOR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SOR))) +#define SSI1_SACNT (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SACNT))) +#define SSI1_SACADD (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SACADD))) +#define SSI1_SACDAT (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SACDAT))) +#define SSI1_SATAG (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SATAG))) +#define SSI1_STMSK (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STMSK))) +#define SSI1_SRMSK (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SRMSK))) + + +#define SSI2_STX0 (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STX0))) +#define SSI2_STX1 (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STX1))) +#define SSI2_SRX0 (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SRX0))) +#define SSI2_SRX1 (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SRX1))) +#define SSI2_SCR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SCR))) +#define SSI2_SISR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SISR))) +#define SSI2_SIER (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SIER))) +#define SSI2_STCR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STCR))) +#define SSI2_SRCR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SRCR))) +#define SSI2_STCCR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STCCR))) +#define SSI2_SRCCR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SRCCR))) +#define SSI2_SFCSR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SFCSR))) +#define SSI2_STR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STR))) +#define SSI2_SOR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SOR))) +#define SSI2_SACNT (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SACNT))) +#define SSI2_SACADD (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SACADD))) +#define SSI2_SACDAT (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SACDAT))) +#define SSI2_SATAG (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SATAG))) +#define SSI2_STMSK (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STMSK))) +#define SSI2_SRMSK (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SRMSK))) + +#define SSI_SCR_CLK_IST (1 << 9) +#define SSI_SCR_TCH_EN (1 << 8) +#define SSI_SCR_SYS_CLK_EN (1 << 7) +#define SSI_SCR_I2S_MODE_NORM (0 << 5) +#define SSI_SCR_I2S_MODE_MSTR (1 << 5) +#define SSI_SCR_I2S_MODE_SLAVE (2 << 5) +#define SSI_SCR_SYN (1 << 4) +#define SSI_SCR_NET (1 << 3) +#define SSI_SCR_RE (1 << 2) +#define SSI_SCR_TE (1 << 1) +#define SSI_SCR_SSIEN (1 << 0) + +#define SSI_SISR_CMDAU (1 << 18) +#define SSI_SISR_CMDDU (1 << 17) +#define SSI_SISR_RXT (1 << 16) +#define SSI_SISR_RDR1 (1 << 15) +#define SSI_SISR_RDR0 (1 << 14) +#define SSI_SISR_TDE1 (1 << 13) +#define SSI_SISR_TDE0 (1 << 12) +#define SSI_SISR_ROE1 (1 << 11) +#define SSI_SISR_ROE0 (1 << 10) +#define SSI_SISR_TUE1 (1 << 9) +#define SSI_SISR_TUE0 (1 << 8) +#define SSI_SISR_TFS (1 << 7) +#define SSI_SISR_RFS (1 << 6) +#define SSI_SISR_TLS (1 << 5) +#define SSI_SISR_RLS (1 << 4) +#define SSI_SISR_RFF1 (1 << 3) +#define SSI_SISR_RFF0 (1 << 2) +#define SSI_SISR_TFE1 (1 << 1) +#define SSI_SISR_TFE0 (1 << 0) + +#define SSI_SIER_RDMAE (1 << 22) +#define SSI_SIER_RIE (1 << 21) +#define SSI_SIER_TDMAE (1 << 20) +#define SSI_SIER_TIE (1 << 19) +#define SSI_SIER_CMDAU_EN (1 << 18) +#define SSI_SIER_CMDDU_EN (1 << 17) +#define SSI_SIER_RXT_EN (1 << 16) +#define SSI_SIER_RDR1_EN (1 << 15) +#define SSI_SIER_RDR0_EN (1 << 14) +#define SSI_SIER_TDE1_EN (1 << 13) +#define SSI_SIER_TDE0_EN (1 << 12) +#define SSI_SIER_ROE1_EN (1 << 11) +#define SSI_SIER_ROE0_EN (1 << 10) +#define SSI_SIER_TUE1_EN (1 << 9) +#define SSI_SIER_TUE0_EN (1 << 8) +#define SSI_SIER_TFS_EN (1 << 7) +#define SSI_SIER_RFS_EN (1 << 6) +#define SSI_SIER_TLS_EN (1 << 5) +#define SSI_SIER_RLS_EN (1 << 4) +#define SSI_SIER_RFF1_EN (1 << 3) +#define SSI_SIER_RFF0_EN (1 << 2) +#define SSI_SIER_TFE1_EN (1 << 1) +#define SSI_SIER_TFE0_EN (1 << 0) + +#define SSI_STCR_TXBIT0 (1 << 9) +#define SSI_STCR_TFEN1 (1 << 8) +#define SSI_STCR_TFEN0 (1 << 7) +#define SSI_STCR_TFDIR (1 << 6) +#define SSI_STCR_TXDIR (1 << 5) +#define SSI_STCR_TSHFD (1 << 4) +#define SSI_STCR_TSCKP (1 << 3) +#define SSI_STCR_TFSI (1 << 2) +#define SSI_STCR_TFSL (1 << 1) +#define SSI_STCR_TEFS (1 << 0) + +#define SSI_SRCR_RXBIT0 (1 << 9) +#define SSI_SRCR_RFEN1 (1 << 8) +#define SSI_SRCR_RFEN0 (1 << 7) +#define SSI_SRCR_RFDIR (1 << 6) +#define SSI_SRCR_RXDIR (1 << 5) +#define SSI_SRCR_RSHFD (1 << 4) +#define SSI_SRCR_RSCKP (1 << 3) +#define SSI_SRCR_RFSI (1 << 2) +#define SSI_SRCR_RFSL (1 << 1) +#define SSI_SRCR_REFS (1 << 0) + +#define SSI_STCCR_DIV2 (1 << 18) +#define SSI_STCCR_PSR (1 << 15) +#define SSI_STCCR_WL(x) ((((x) - 2) >> 1) << 13) +#define SSI_STCCR_DC(x) (((x) & 0x1f) << 8) +#define SSI_STCCR_PM(x) (((x) & 0xff) << 0) +#define SSI_STCCR_WL_MASK (0xf << 13) +#define SSI_STCCR_DC_MASK (0x1f << 8) +#define SSI_STCCR_PM_MASK (0xff << 0) + +#define SSI_SRCCR_DIV2 (1 << 18) +#define SSI_SRCCR_PSR (1 << 15) +#define SSI_SRCCR_WL(x) ((((x) - 2) >> 1) << 13) +#define SSI_SRCCR_DC(x) (((x) & 0x1f) << 8) +#define SSI_SRCCR_PM(x) (((x) & 0xff) << 0) +#define SSI_SRCCR_WL_MASK (0xf << 13) +#define SSI_SRCCR_DC_MASK (0x1f << 8) +#define SSI_SRCCR_PM_MASK (0xff << 0) + + +#define SSI_SFCSR_RFCNT1(x) (((x) & 0xf) << 28) +#define SSI_SFCSR_TFCNT1(x) (((x) & 0xf) << 24) +#define SSI_SFCSR_RFWM1(x) (((x) & 0xf) << 20) +#define SSI_SFCSR_TFWM1(x) (((x) & 0xf) << 16) +#define SSI_SFCSR_RFCNT0(x) (((x) & 0xf) << 12) +#define SSI_SFCSR_TFCNT0(x) (((x) & 0xf) << 8) +#define SSI_SFCSR_RFWM0(x) (((x) & 0xf) << 4) +#define SSI_SFCSR_TFWM0(x) (((x) & 0xf) << 0) + +#define SSI_STR_TEST (1 << 15) +#define SSI_STR_RCK2TCK (1 << 14) +#define SSI_STR_RFS2TFS (1 << 13) +#define SSI_STR_RXSTATE(x) (((x) & 0xf) << 8) +#define SSI_STR_TXD2RXD (1 << 7) +#define SSI_STR_TCK2RCK (1 << 6) +#define SSI_STR_TFS2RFS (1 << 5) +#define SSI_STR_TXSTATE(x) (((x) & 0xf) << 0) + +#define SSI_SOR_CLKOFF (1 << 6) +#define SSI_SOR_RX_CLR (1 << 5) +#define SSI_SOR_TX_CLR (1 << 4) +#define SSI_SOR_INIT (1 << 3) +#define SSI_SOR_WAIT(x) (((x) & 0x3) << 1) +#define SSI_SOR_SYNRST (1 << 0) + +#define SSI_SACNT_FRDIV(x) (((x) & 0x3f) << 5) +#define SSI_SACNT_WR (x << 4) +#define SSI_SACNT_RD (x << 3) +#define SSI_SACNT_TIF (x << 2) +#define SSI_SACNT_FV (x << 1) +#define SSI_SACNT_AC97EN (x << 0) + +/* Watermarks for FIFO's */ +#define TXFIFO_WATERMARK 0x4 +#define RXFIFO_WATERMARK 0x4 + +/* i.MX DAI SSP ID's */ +#define IMX_DAI_SSI0 0 /* SSI1 FIFO 0 */ +#define IMX_DAI_SSI1 1 /* SSI1 FIFO 1 */ +#define IMX_DAI_SSI2 2 /* SSI2 FIFO 0 */ +#define IMX_DAI_SSI3 3 /* SSI2 FIFO 1 */ + +/* SSI clock sources */ +#define IMX_SSP_SYS_CLK 0 + +/* SSI audio dividers */ +#define IMX_SSI_TX_DIV_2 0 +#define IMX_SSI_TX_DIV_PSR 1 +#define IMX_SSI_TX_DIV_PM 2 +#define IMX_SSI_RX_DIV_2 3 +#define IMX_SSI_RX_DIV_PSR 4 +#define IMX_SSI_RX_DIV_PM 5 + + +/* SSI Div 2 */ +#define IMX_SSI_DIV_2_OFF (~SSI_STCCR_DIV2) +#define IMX_SSI_DIV_2_ON SSI_STCCR_DIV2 + +extern struct snd_soc_dai imx_ssi_pcm_dai[4]; +extern int get_ssi_clk(int ssi, struct device *dev); +extern void put_ssi_clk(int ssi); +#endif |