AC97 driver for mpc5200
Signed-off-by: Jon Smirl jonsmirl@gmail.com --- sound/soc/fsl/Kconfig | 11 + sound/soc/fsl/Makefile | 1 sound/soc/fsl/mpc5200_psc_ac97.c | 379 ++++++++++++++++++++++++++++++++++++++ sound/soc/fsl/mpc5200_psc_ac97.h | 13 + 4 files changed, 404 insertions(+), 0 deletions(-) create mode 100644 sound/soc/fsl/mpc5200_psc_ac97.c create mode 100644 sound/soc/fsl/mpc5200_psc_ac97.h
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig index 8060b95..d8f63f5 100644 --- a/sound/soc/fsl/Kconfig +++ b/sound/soc/fsl/Kconfig @@ -30,3 +30,14 @@ config SND_SOC_MPC5200_I2S select PPC_BESTCOMM_GEN_BD help Say Y here to support the MPC5200 PSCs in I2S mode. + +config SND_SOC_MPC5200_AC97 + tristate "Freescale MPC5200 PSC in AC97 mode driver" + depends on PPC_MPC52xx && PPC_BESTCOMM + select SND_SOC_OF_SIMPLE + select SND_MPC52xx_DMA + select PPC_BESTCOMM_GEN_BD + help + Say Y here to support the MPC5200 PSCs in AC97 mode. + + diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile index 7731ef2..14631a1 100644 --- a/sound/soc/fsl/Makefile +++ b/sound/soc/fsl/Makefile @@ -13,4 +13,5 @@ obj-$(CONFIG_SND_SOC_MPC8610) += snd-soc-fsl-ssi.o snd-soc-fsl-dma.o # MPC5200 Platform Support obj-$(CONFIG_SND_MPC52xx_DMA) += mpc5200_dma.o obj-$(CONFIG_SND_SOC_MPC5200_I2S) += mpc5200_psc_i2s.o +obj-$(CONFIG_SND_SOC_MPC5200_AC97) += mpc5200_psc_ac97.o
diff --git a/sound/soc/fsl/mpc5200_psc_ac97.c b/sound/soc/fsl/mpc5200_psc_ac97.c new file mode 100644 index 0000000..aa37c8d --- /dev/null +++ b/sound/soc/fsl/mpc5200_psc_ac97.c @@ -0,0 +1,379 @@ +/* + * linux/sound/mpc5200-ac97.c -- AC97 support for the Freescale MPC52xx chip. + * + * Copyright 2008 Jon Smirl, Digispeaker + * Author: Jon Smirl jonsmirl@gmail.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> +#include <linux/dma-mapping.h> + +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/initval.h> +#include <sound/soc.h> +#include <sound/soc-of-simple.h> + +#include <sysdev/bestcomm/bestcomm.h> +#include <sysdev/bestcomm/gen_bd.h> +#include <asm/time.h> +#include <asm/mpc52xx.h> +#include <asm/mpc52xx_psc.h> + +#include "mpc5200_dma.h" +#include "mpc5200_psc_ac97.h" + +MODULE_AUTHOR("Jon Smirl jonsmirl@gmail.com"); +MODULE_DESCRIPTION("mpc5200 AC97 module"); +MODULE_LICENSE("GPL"); + +#define DRV_NAME "mpc5200-psc-ac97" + +static unsigned short psc_ac97_read(struct snd_ac97 *ac97, unsigned short reg) +{ + struct psc_dma *psc_dma = ac97->private_data; + int timeout; + unsigned int val; + + spin_lock(&psc_dma->lock); + + /* Wait for it to be ready */ + timeout = 1000; + while ((--timeout) && (in_be16(&psc_dma->psc_regs->sr_csr.status) & + MPC52xx_PSC_SR_CMDSEND) ) + udelay(10); + + if (!timeout) { + pr_err(timeout on ac97 bus (rdy)\n"); + return 0xffff; + } + + /* Do the read */ + out_be32(&psc_dma->psc_regs->ac97_cmd, (1<<31) | ((reg & 0x7f) << 24)); + + /* Wait for the answer */ + timeout = 1000; + while ((--timeout) && !(in_be16(&psc_dma->psc_regs->sr_csr.status) & + MPC52xx_PSC_SR_DATA_VAL) ) + udelay(10); + + if (!timeout) { + pr_err(timeout on ac97 read (val) %x\n", in_be16(&psc_dma->psc_regs->sr_csr.status)); + return 0xffff; + } + + /* Get the data */ + val = in_be32(&psc_dma->psc_regs->ac97_data); + if ( ((val>>24) & 0x7f) != reg ) { + pr_err(reg echo error on ac97 read\n"); + return 0xffff; + } + val = (val >> 8) & 0xffff; + + spin_unlock(&psc_dma->lock); + return (unsigned short) val; +} + +static void psc_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val) +{ + struct psc_dma *psc_dma = ac97->private_data; + int timeout; + + spin_lock(&psc_dma->lock); + + /* Wait for it to be ready */ + timeout = 1000; + while ((--timeout) && (in_be16(&psc_dma->psc_regs->sr_csr.status) & + MPC52xx_PSC_SR_CMDSEND) ) + udelay(10); + + if (!timeout) { + pr_err(timeout on ac97 write\n"); + return; + } + + /* Write data */ + out_be32(&psc_dma->psc_regs->ac97_cmd, ((reg & 0x7f) << 24) | (val << 8)); + + spin_unlock(&psc_dma->lock); +} + +static void psc_ac97_cold_reset(struct snd_ac97 *ac97) +{ + struct psc_dma *psc_dma = ac97->private_data; + + /* Do a cold reset */ + out_8(&psc_dma->psc_regs->op1, MPC52xx_PSC_OP_RES); + udelay(10); + out_8(&psc_dma->psc_regs->op0, MPC52xx_PSC_OP_RES); + udelay(50); + + /* PSC recover from cold reset (cfr user manual, not sure if useful) */ + out_be32(&psc_dma->psc_regs->sicr, in_be32(&psc_dma->psc_regs->sicr)); +} + +static void psc_ac97_warm_reset(struct snd_ac97 *ac97) +{ + pr_info("psc_ac97_warm_reset\n"); +} + +struct snd_ac97_bus_ops soc_ac97_ops = { + .read = psc_ac97_read, + .write = psc_ac97_write, + .reset = psc_ac97_cold_reset, + .warm_reset = psc_ac97_warm_reset, +}; +EXPORT_SYMBOL_GPL(soc_ac97_ops); + +#ifdef CONFIG_PM +static int psc_ac97_suspend(struct snd_soc_dai *dai) +{ + return 0; +} + +static int psc_ac97_resume(struct snd_soc_dai *dai) +{ + return 0; +} + +#else +#define psc_ac97_suspend NULL +#define psc_ac97_resume NULL +#endif + +static int psc_ac97_hw_analog_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 psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; + + dev_dbg(psc_dma->dev, "%s(substream=%p) p_size=%i p_bytes=%i" + " periods=%i buffer_size=%i buffer_bytes=%i channels=%i" + " rate=%i format=%i\n", + __func__, substream, params_period_size(params), + params_period_bytes(params), params_periods(params), + params_buffer_size(params), params_buffer_bytes(params), + params_channels(params), params_rate(params), params_format(params)); + + + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) { + if (params_channels(params) == 1) + psc_dma->slots |= 0x00000100; + else + psc_dma->slots |= 0x00000300; + } else { + if (params_channels(params) == 1) + psc_dma->slots |= 0x01000000; + else + psc_dma->slots |= 0x03000000; + } + + spin_lock(&psc_dma->lock); + out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots); + spin_unlock(&psc_dma->lock); + + return 0; +} + +static int psc_ac97_hw_digital_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 psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; + + spin_lock(&psc_dma->lock); + if (params_channels(params) == 1) + out_be32(&psc_dma->psc_regs->ac97_slots, 0x01000000); + else + out_be32(&psc_dma->psc_regs->ac97_slots, 0x03000000); + spin_unlock(&psc_dma->lock); + + return 0; +} + +static int psc_ac97_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_STOP: + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + psc_dma->slots &= 0xFFFF0000; + else + psc_dma->slots &= 0x0000FFFF; + + spin_lock(&psc_dma->lock); + out_be32(&psc_dma->psc_regs->ac97_slots, psc_dma->slots); + spin_unlock(&psc_dma->lock); + break; + } + return 0; +} + +/** + * psc_ac97_set_fmt: set the serial format. + * + * This function is called by the machine driver to tell us what serial + * format to use. + * + * This driver only supports AC97 mode. Return an error if the format is + * not SND_SOC_DAIFMT_AC97. + * + * @format: one of SND_SOC_DAIFMT_xxx + */ +static int psc_ac97_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int format) +{ + struct psc_dma *psc_dma = cpu_dai->private_data; + dev_dbg(psc_dma->dev, "psc_ac97_set_fmt(cpu_dai=%p, format=%i)\n", + cpu_dai, format); + + return (format == SND_SOC_DAIFMT_AC97) ? 0 : -EINVAL; +} + +/* --------------------------------------------------------------------- + * ALSA SoC Bindings + * + * - Digital Audio Interface (DAI) template + * - create/destroy dai hooks + */ + +/** + * psc_ac97_dai_template: template CPU Digital Audio Interface + */ +static struct snd_soc_dai_ops psc_ac97_analog_ops = { + .hw_params = psc_ac97_hw_analog_params, + .set_fmt = psc_ac97_set_fmt, + .trigger = psc_ac97_trigger, +}; + +static struct snd_soc_dai_ops psc_ac97_digital_ops = { + .hw_params = psc_ac97_hw_digital_params, + .set_fmt = psc_ac97_set_fmt, +}; + +static struct snd_soc_dai psc_ac97_dai_template[] = { +{ + .name = "%s analog", + .suspend = psc_ac97_suspend, + .resume = psc_ac97_resume, + .playback = { + .channels_min = 1, + .channels_max = 6, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | + SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE, + }, + .capture = { + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | + SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE, + }, + .ops = &psc_ac97_analog_ops, +}, +{ + .name = "%s digital", + .playback = { + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_32000 | \ + SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE, + }, + .ops = &psc_ac97_digital_ops, +}}; + + +/* --------------------------------------------------------------------- + * OF platform bus binding code: + * - Probe/remove operations + * - OF device match table + */ +static int __devinit psc_ac97_of_probe(struct of_device *op, + const struct of_device_id *match) +{ + int rc; + struct psc_dma *psc_dma; + + rc = mpc5200_audio_dma_create(op, psc_ac97_dai_template, ARRAY_SIZE(psc_ac97_dai_template)); + if (rc != 0) + return rc; + + psc_dma = dev_get_drvdata(&op->dev); + + psc_dma->imr = 0; + out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr); + + out_8(&psc_dma->psc_regs->op1, MPC52xx_PSC_OP_RES); + udelay(10); + out_8(&psc_dma->psc_regs->op0, MPC52xx_PSC_OP_RES); + udelay(50); + + /* Configure the serial interface mode to AC97 */ + psc_dma->sicr = MPC52xx_PSC_SICR_SIM_AC97 | MPC52xx_PSC_SICR_ENAC97; + out_be32(&psc_dma->psc_regs->sicr, psc_dma->sicr); + + /* No slots active */ + out_be32(&psc_dma->psc_regs->ac97_slots, 0x00000000); + + /* Go */ + out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_TX_ENABLE); + out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RX_ENABLE); + + return 0; +} + +static int __devexit psc_ac97_of_remove(struct of_device *op) +{ + return mpc5200_audio_dma_destroy(op); +} + +/* Match table for of_platform binding */ +static struct of_device_id psc_ac97_match[] __devinitdata = { + { .compatible = "fsl,mpc5200-psc-ac97", }, + { .compatible = "fsl,mpc5200b-psc-ac97", }, + {} +}; +MODULE_DEVICE_TABLE(of, psc_ac97_match); + +static struct of_platform_driver psc_ac97_driver = { + .match_table = psc_ac97_match, + .probe = psc_ac97_of_probe, + .remove = __devexit_p(psc_ac97_of_remove), + .driver = { + .name = "mpc5200-psc-ac97", + .owner = THIS_MODULE, + }, +}; + +/* --------------------------------------------------------------------- + * Module setup and teardown; simply register the of_platform driver + * for the PSC in AC97 mode. + */ +static int __init psc_ac97_init(void) +{ + return of_register_platform_driver(&psc_ac97_driver); +} +module_init(psc_ac97_init); + +static void __exit psc_ac97_exit(void) +{ + of_unregister_platform_driver(&psc_ac97_driver); +} +module_exit(psc_ac97_exit); diff --git a/sound/soc/fsl/mpc5200_psc_ac97.h b/sound/soc/fsl/mpc5200_psc_ac97.h new file mode 100644 index 0000000..d028c55 --- /dev/null +++ b/sound/soc/fsl/mpc5200_psc_ac97.h @@ -0,0 +1,13 @@ +/* + * Freescale MPC5200 PSC in AC97 mode + * ALSA SoC Digital Audio Interface (DAI) driver + * + */ + +#ifndef __SOUND_SOC_FSL_MPC52xx_PSC_AC97_H__ +#define __SOUND_SOC_FSL_MPC52xx_PSC_AC97_H__ + +#define MPC5200_AC97_ANALOG 0 +#define MPC5200_AC97_DIGITAL 1 + +#endif /* __SOUND_SOC_FSL_MPC52xx_PSC_AC97_H__ */