diff options
Diffstat (limited to 'sound/soc/imx/imx-ccwmx51js-wm8753.c')
| -rw-r--r-- | sound/soc/imx/imx-ccwmx51js-wm8753.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/sound/soc/imx/imx-ccwmx51js-wm8753.c b/sound/soc/imx/imx-ccwmx51js-wm8753.c new file mode 100644 index 000000000000..0bcb5aeb1de6 --- /dev/null +++ b/sound/soc/imx/imx-ccwmx51js-wm8753.c @@ -0,0 +1,311 @@ +/* + * imx-ccwmx51js-wm8753.c -- Digi CCWMX51JS Driver for Wolfson WM8753 Codec + * + * Adapted by Timesys from sgtl5000 machine driver and other sources. + * + * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright 2010 Timesys Corporation. All Rights Reserved. + * + * 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 + * 1st April 2010 Initial version. + * + */ + +#include <linux/platform_device.h> +#include <linux/i2c.h> +#include <linux/err.h> +#include <linux/irq.h> +#include <linux/io.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/initval.h> + +#include <mach/dma.h> +#include <mach/spba.h> +#include <mach/clock.h> + +#include "../codecs/wm8753.h" +#include "imx-ssi.h" +#include "imx-pcm.h" + +/* SSI BCLK and LRC master */ +#define WM8753_SSI_MASTER 1 + +struct imx_ccwmx51js_priv { + int sysclk; + int hw; + struct platform_device *pdev; +}; + +static struct imx_ccwmx51js_priv card_priv; + +static int imx_ccwmx51js_audio_hw_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_link *machine = rtd->dai; + struct snd_soc_dai *cpu_dai = machine->cpu_dai; + struct snd_soc_dai *codec_dai = machine->codec_dai; + struct imx_ccwmx51js_priv *priv = &card_priv; + struct imx_ssi *ssi_mode = (struct imx_ssi *)cpu_dai->private_data; + int ret = 0; + + unsigned int channels = params_channels(params); + u32 dai_format; + + snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, priv->sysclk, 0); + +#if WM8753_SSI_MASTER + dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM; +#else + dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS; +#endif + + ssi_mode->sync_mode = 1; + if (channels == 1) + ssi_mode->network_mode = 0; + else + ssi_mode->network_mode = 1; + + /* set codec DAI configuration */ + ret = snd_soc_dai_set_fmt(codec_dai, dai_format); + if (ret < 0) + return ret; + + /* set i.MX active slot mask */ + snd_soc_dai_set_tdm_slot(cpu_dai, + channels == 1 ? 0xfffffffe : 0xfffffffc, 2); + + /* set cpu DAI configuration */ + ret = snd_soc_dai_set_fmt(cpu_dai, dai_format); + if (ret < 0) + return ret; + + /* set the SSI system clock as input (unused) */ + snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0, SND_SOC_CLOCK_IN); + + /* The WM8753 PLL on the Digi CCWMX51JS is referenced to a fixed 13-MHz + * oscillator. We presently operate the PLL only at 11.289600 + * MHz output, which supports a 44.1-kHz sample rate and a few others. + * + */ + /* set codec BCLK division for sample rate */ + ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_BCLKDIV, WM8753_BCLK_DIV_4); + if (ret < 0) + return ret; + + /* Specify input PLL frequency and desired output frequency. */ + ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 13000000, 11289600); + if (ret < 0) + return ret; + + return 0; +} + +static int imx_ccwmx51js_startup(struct snd_pcm_substream *substream) +{ + return 0; +} + +static void imx_ccwmx51js_shutdown(struct snd_pcm_substream *substream) +{ + struct imx_ccwmx51js_priv *priv = &card_priv; + + priv->hw = 0; +} + +/* + * imx_ccwmx51js wm8576 audio DAI opserations. + */ +static struct snd_soc_ops imx_ccwmx51js_ops = { + .startup = imx_ccwmx51js_startup, + .shutdown = imx_ccwmx51js_shutdown, + .hw_params = imx_ccwmx51js_audio_hw_params, +}; + +static void imx_ccwmx51js_init_dam(int ssi_port, int dai_port) +{ + unsigned int ssi_ptcr = 0; + unsigned int dai_ptcr = 0; + unsigned int ssi_pdcr = 0; + unsigned int dai_pdcr = 0; + /* i.MX51 uses SSI1 or SSI2 via AUDMUX port dai_port for audio */ + + /* reset port ssi_port & dai_port */ + __raw_writel(0, DAM_PTCR(ssi_port)); + __raw_writel(0, DAM_PTCR(dai_port)); + __raw_writel(0, DAM_PDCR(ssi_port)); + __raw_writel(0, DAM_PDCR(dai_port)); + + /* set to synchronous */ + ssi_ptcr |= AUDMUX_PTCR_SYN; + dai_ptcr |= AUDMUX_PTCR_SYN; + +#if WM8753_SSI_MASTER + /* set Rx sources ssi_port <--> dai_port */ + ssi_pdcr |= AUDMUX_PDCR_RXDSEL(dai_port); + dai_pdcr |= AUDMUX_PDCR_RXDSEL(ssi_port); + + /* set Tx frame direction and source dai_port--> ssi_port output */ + ssi_ptcr |= AUDMUX_PTCR_TFSDIR; + ssi_ptcr |= AUDMUX_PTCR_TFSSEL(AUDMUX_FROM_TXFS, dai_port); + + /* set Tx Clock direction and source dai_port--> ssi_port output */ + ssi_ptcr |= AUDMUX_PTCR_TCLKDIR; + ssi_ptcr |= AUDMUX_PTCR_TCSEL(AUDMUX_FROM_TXFS, dai_port); +#else + /* set Rx sources ssi_port <--> dai_port */ + ssi_pdcr |= AUDMUX_PDCR_RXDSEL(dai_port); + dai_pdcr |= AUDMUX_PDCR_RXDSEL(ssi_port); + + /* set Tx frame direction and source ssi_port --> dai_port output */ + dai_ptcr |= AUDMUX_PTCR_TFSDIR; + dai_ptcr |= AUDMUX_PTCR_TFSSEL(AUDMUX_FROM_TXFS, ssi_port); + + /* set Tx Clock direction and source ssi_port--> dai_port output */ + dai_ptcr |= AUDMUX_PTCR_TCLKDIR; + dai_ptcr |= AUDMUX_PTCR_TCSEL(AUDMUX_FROM_TXFS, ssi_port); +#endif + + __raw_writel(ssi_ptcr, DAM_PTCR(ssi_port)); + __raw_writel(dai_ptcr, DAM_PTCR(dai_port)); + __raw_writel(ssi_pdcr, DAM_PDCR(ssi_port)); + __raw_writel(dai_pdcr, DAM_PDCR(dai_port)); +} + +static int imx_ccwmx51js_wm8753_init(struct snd_soc_codec *codec) +{ + snd_soc_dapm_sync(codec); + + return 0; +} + +/* imx_ccwmx51js digital audio interface glue - connects codec <--> CPU */ +static struct snd_soc_dai_link imx_ccwmx51js_dai = { + .name = "wm8753", + .stream_name = "wm8753", + .codec_dai = &wm8753_dai[WM8753_DAI_HIFI], + .init = imx_ccwmx51js_wm8753_init, + .ops = &imx_ccwmx51js_ops, +}; + +static int imx_ccwmx51js_card_remove(struct platform_device *pdev) +{ + struct imx_ccwmx51js_priv *priv = &card_priv; + struct mxc_audio_platform_data *plat; + if (priv->pdev) { + plat = priv->pdev->dev.platform_data; + if (plat->finit) + plat->finit(); + } + + return 0; +} + +static struct snd_soc_card snd_soc_card_imx_ccwmx51js = { + .name = "imx-ccwmx51js", + .platform = &imx_soc_platform, + .dai_link = &imx_ccwmx51js_dai, + .num_links = 1, + .remove = imx_ccwmx51js_card_remove, +}; + +static struct snd_soc_device imx_ccwmx51js_snd_devdata = { + .card = &snd_soc_card_imx_ccwmx51js, + .codec_dev = &soc_codec_dev_wm8753, +}; + +static int __devinit imx_ccwmx51js_wm8753_probe(struct platform_device *pdev) +{ + struct mxc_audio_platform_data *plat = pdev->dev.platform_data; + struct imx_ccwmx51js_priv *priv = &card_priv; + struct snd_soc_dai *wm8753_cpu_dai; + int ret = 0; + + priv->sysclk = plat->sysclk; + priv->pdev = pdev; + + gpio_activate_audio_ports(); + imx_ccwmx51js_init_dam(plat->src_port, plat->ext_port); + + if (plat->src_port == 2) + wm8753_cpu_dai = &imx_ssi_dai[2]; + else + wm8753_cpu_dai = &imx_ssi_dai[0]; + + imx_ccwmx51js_dai.cpu_dai = wm8753_cpu_dai; + + ret = -EINVAL; + if (plat->init && plat->init()) + goto err_plat_init; + + return 0; + +err_plat_init: + return ret; +} + +static int imx_ccwmx51js_wm8753_remove(struct platform_device *pdev) +{ + struct mxc_audio_platform_data *plat = pdev->dev.platform_data; + + if (plat->finit) + plat->finit(); + + return 0; +} + +static struct platform_driver imx_ccwmx51js_wm8753_audio_driver = { + .probe = imx_ccwmx51js_wm8753_probe, + .remove = imx_ccwmx51js_wm8753_remove, + .driver = { + .name = "imx-ccwmx51js-wm8753", + }, +}; + +static struct platform_device *imx_ccwmx51js_snd_device; + +static int __init imx_ccwmx51js_init(void) +{ + int ret; + + ret = platform_driver_register(&imx_ccwmx51js_wm8753_audio_driver); + if (ret) + return -ENOMEM; + + imx_ccwmx51js_snd_device = platform_device_alloc("soc-audio", 2); + if (!imx_ccwmx51js_snd_device) + return -ENOMEM; + + platform_set_drvdata(imx_ccwmx51js_snd_device, &imx_ccwmx51js_snd_devdata); + imx_ccwmx51js_snd_devdata.dev = &imx_ccwmx51js_snd_device->dev; + ret = platform_device_add(imx_ccwmx51js_snd_device); + + if (ret) + platform_device_put(imx_ccwmx51js_snd_device); + + return ret; +} + +static void __exit imx_ccwmx51js_exit(void) +{ + platform_driver_unregister(&imx_ccwmx51js_wm8753_audio_driver); + platform_device_unregister(imx_ccwmx51js_snd_device); +} + +module_init(imx_ccwmx51js_init); +module_exit(imx_ccwmx51js_exit); + +MODULE_AUTHOR("Timesys Corporation"); +MODULE_DESCRIPTION("WM8753 Driver for CCWMX51JS"); +MODULE_LICENSE("GPL"); |