diff options
Diffstat (limited to 'sound/soc/fsl/mpc8610_hpcd.c')
| -rw-r--r-- | sound/soc/fsl/mpc8610_hpcd.c | 451 |
1 files changed, 451 insertions, 0 deletions
diff --git a/sound/soc/fsl/mpc8610_hpcd.c b/sound/soc/fsl/mpc8610_hpcd.c new file mode 100644 index 0000000000..ea2076ea8a --- /dev/null +++ b/sound/soc/fsl/mpc8610_hpcd.c @@ -0,0 +1,451 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Freescale MPC8610HPCD ALSA SoC Machine driver +// +// Author: Timur Tabi <timur@freescale.com> +// +// Copyright 2007-2010 Freescale Semiconductor, Inc. + +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/fsl/guts.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/slab.h> +#include <sound/soc.h> + +#include "fsl_dma.h" +#include "fsl_ssi.h" +#include "fsl_utils.h" + +/* There's only one global utilities register */ +static phys_addr_t guts_phys; + +/** + * mpc8610_hpcd_data: machine-specific ASoC device data + * + * This structure contains data for a single sound platform device on an + * MPC8610 HPCD. Some of the data is taken from the device tree. + */ +struct mpc8610_hpcd_data { + struct snd_soc_dai_link dai[2]; + struct snd_soc_card card; + unsigned int dai_format; + unsigned int codec_clk_direction; + unsigned int cpu_clk_direction; + unsigned int clk_frequency; + unsigned int ssi_id; /* 0 = SSI1, 1 = SSI2, etc */ + unsigned int dma_id[2]; /* 0 = DMA1, 1 = DMA2, etc */ + unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/ + char codec_dai_name[DAI_NAME_SIZE]; + char platform_name[2][DAI_NAME_SIZE]; /* One for each DMA channel */ +}; + +/** + * mpc8610_hpcd_machine_probe: initialize the board + * + * This function is used to initialize the board-specific hardware. + * + * Here we program the DMACR and PMUXCR registers. + */ +static int mpc8610_hpcd_machine_probe(struct snd_soc_card *card) +{ + struct mpc8610_hpcd_data *machine_data = + container_of(card, struct mpc8610_hpcd_data, card); + struct ccsr_guts __iomem *guts; + + guts = ioremap(guts_phys, sizeof(struct ccsr_guts)); + if (!guts) { + dev_err(card->dev, "could not map global utilities\n"); + return -ENOMEM; + } + + /* Program the signal routing between the SSI and the DMA */ + guts_set_dmacr(guts, machine_data->dma_id[0], + machine_data->dma_channel_id[0], + CCSR_GUTS_DMACR_DEV_SSI); + guts_set_dmacr(guts, machine_data->dma_id[1], + machine_data->dma_channel_id[1], + CCSR_GUTS_DMACR_DEV_SSI); + + guts_set_pmuxcr_dma(guts, machine_data->dma_id[0], + machine_data->dma_channel_id[0], 0); + guts_set_pmuxcr_dma(guts, machine_data->dma_id[1], + machine_data->dma_channel_id[1], 0); + + switch (machine_data->ssi_id) { + case 0: + clrsetbits_be32(&guts->pmuxcr, + CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_SSI); + break; + case 1: + clrsetbits_be32(&guts->pmuxcr, + CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_SSI); + break; + } + + iounmap(guts); + + return 0; +} + +/** + * mpc8610_hpcd_startup: program the board with various hardware parameters + * + * This function takes board-specific information, like clock frequencies + * and serial data formats, and passes that information to the codec and + * transport drivers. + */ +static int mpc8610_hpcd_startup(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct mpc8610_hpcd_data *machine_data = + container_of(rtd->card, struct mpc8610_hpcd_data, card); + struct device *dev = rtd->card->dev; + int ret = 0; + + /* Tell the codec driver what the serial protocol is. */ + ret = snd_soc_dai_set_fmt(asoc_rtd_to_codec(rtd, 0), machine_data->dai_format); + if (ret < 0) { + dev_err(dev, "could not set codec driver audio format\n"); + return ret; + } + + /* + * Tell the codec driver what the MCLK frequency is, and whether it's + * a slave or master. + */ + ret = snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0), 0, + machine_data->clk_frequency, + machine_data->codec_clk_direction); + if (ret < 0) { + dev_err(dev, "could not set codec driver clock params\n"); + return ret; + } + + return 0; +} + +/** + * mpc8610_hpcd_machine_remove: Remove the sound device + * + * This function is called to remove the sound device for one SSI. We + * de-program the DMACR and PMUXCR register. + */ +static int mpc8610_hpcd_machine_remove(struct snd_soc_card *card) +{ + struct mpc8610_hpcd_data *machine_data = + container_of(card, struct mpc8610_hpcd_data, card); + struct ccsr_guts __iomem *guts; + + guts = ioremap(guts_phys, sizeof(struct ccsr_guts)); + if (!guts) { + dev_err(card->dev, "could not map global utilities\n"); + return -ENOMEM; + } + + /* Restore the signal routing */ + + guts_set_dmacr(guts, machine_data->dma_id[0], + machine_data->dma_channel_id[0], 0); + guts_set_dmacr(guts, machine_data->dma_id[1], + machine_data->dma_channel_id[1], 0); + + switch (machine_data->ssi_id) { + case 0: + clrsetbits_be32(&guts->pmuxcr, + CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_LA); + break; + case 1: + clrsetbits_be32(&guts->pmuxcr, + CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_LA); + break; + } + + iounmap(guts); + + return 0; +} + +/** + * mpc8610_hpcd_ops: ASoC machine driver operations + */ +static const struct snd_soc_ops mpc8610_hpcd_ops = { + .startup = mpc8610_hpcd_startup, +}; + +/** + * mpc8610_hpcd_probe: platform probe function for the machine driver + * + * Although this is a machine driver, the SSI node is the "master" node with + * respect to audio hardware connections. Therefore, we create a new ASoC + * device for each new SSI node that has a codec attached. + */ +static int mpc8610_hpcd_probe(struct platform_device *pdev) +{ + struct device *dev = pdev->dev.parent; + /* ssi_pdev is the platform device for the SSI node that probed us */ + struct platform_device *ssi_pdev = to_platform_device(dev); + struct device_node *np = ssi_pdev->dev.of_node; + struct device_node *codec_np = NULL; + struct mpc8610_hpcd_data *machine_data; + struct snd_soc_dai_link_component *comp; + int ret; + const char *sprop; + const u32 *iprop; + + /* Find the codec node for this SSI. */ + codec_np = of_parse_phandle(np, "codec-handle", 0); + if (!codec_np) { + dev_err(dev, "invalid codec node\n"); + return -EINVAL; + } + + machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL); + if (!machine_data) { + ret = -ENOMEM; + goto error_alloc; + } + + comp = devm_kzalloc(&pdev->dev, 6 * sizeof(*comp), GFP_KERNEL); + if (!comp) { + ret = -ENOMEM; + goto error_alloc; + } + + machine_data->dai[0].cpus = &comp[0]; + machine_data->dai[0].codecs = &comp[1]; + machine_data->dai[0].platforms = &comp[2]; + + machine_data->dai[0].num_cpus = 1; + machine_data->dai[0].num_codecs = 1; + machine_data->dai[0].num_platforms = 1; + + machine_data->dai[1].cpus = &comp[3]; + machine_data->dai[1].codecs = &comp[4]; + machine_data->dai[1].platforms = &comp[5]; + + machine_data->dai[1].num_cpus = 1; + machine_data->dai[1].num_codecs = 1; + machine_data->dai[1].num_platforms = 1; + + machine_data->dai[0].cpus->dai_name = dev_name(&ssi_pdev->dev); + machine_data->dai[0].ops = &mpc8610_hpcd_ops; + + /* ASoC core can match codec with device node */ + machine_data->dai[0].codecs->of_node = codec_np; + + /* The DAI name from the codec (snd_soc_dai_driver.name) */ + machine_data->dai[0].codecs->dai_name = "cs4270-hifi"; + + /* We register two DAIs per SSI, one for playback and the other for + * capture. Currently, we only support codecs that have one DAI for + * both playback and capture. + */ + memcpy(&machine_data->dai[1], &machine_data->dai[0], + sizeof(struct snd_soc_dai_link)); + + /* Get the device ID */ + iprop = of_get_property(np, "cell-index", NULL); + if (!iprop) { + dev_err(&pdev->dev, "cell-index property not found\n"); + ret = -EINVAL; + goto error; + } + machine_data->ssi_id = be32_to_cpup(iprop); + + /* Get the serial format and clock direction. */ + sprop = of_get_property(np, "fsl,mode", NULL); + if (!sprop) { + dev_err(&pdev->dev, "fsl,mode property not found\n"); + ret = -EINVAL; + goto error; + } + + if (strcasecmp(sprop, "i2s-slave") == 0) { + machine_data->dai_format = + SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBP_CFP; + machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT; + machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN; + + /* In i2s-slave mode, the codec has its own clock source, so we + * need to get the frequency from the device tree and pass it to + * the codec driver. + */ + iprop = of_get_property(codec_np, "clock-frequency", NULL); + if (!iprop || !*iprop) { + dev_err(&pdev->dev, "codec bus-frequency " + "property is missing or invalid\n"); + ret = -EINVAL; + goto error; + } + machine_data->clk_frequency = be32_to_cpup(iprop); + } else if (strcasecmp(sprop, "i2s-master") == 0) { + machine_data->dai_format = + SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBC_CFC; + machine_data->codec_clk_direction = SND_SOC_CLOCK_IN; + machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT; + } else if (strcasecmp(sprop, "lj-slave") == 0) { + machine_data->dai_format = + SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBP_CFP; + machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT; + machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN; + } else if (strcasecmp(sprop, "lj-master") == 0) { + machine_data->dai_format = + SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBC_CFC; + machine_data->codec_clk_direction = SND_SOC_CLOCK_IN; + machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT; + } else if (strcasecmp(sprop, "rj-slave") == 0) { + machine_data->dai_format = + SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBP_CFP; + machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT; + machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN; + } else if (strcasecmp(sprop, "rj-master") == 0) { + machine_data->dai_format = + SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBC_CFC; + machine_data->codec_clk_direction = SND_SOC_CLOCK_IN; + machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT; + } else if (strcasecmp(sprop, "ac97-slave") == 0) { + machine_data->dai_format = + SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBP_CFP; + machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT; + machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN; + } else if (strcasecmp(sprop, "ac97-master") == 0) { + machine_data->dai_format = + SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBC_CFC; + machine_data->codec_clk_direction = SND_SOC_CLOCK_IN; + machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT; + } else { + dev_err(&pdev->dev, + "unrecognized fsl,mode property '%s'\n", sprop); + ret = -EINVAL; + goto error; + } + + if (!machine_data->clk_frequency) { + dev_err(&pdev->dev, "unknown clock frequency\n"); + ret = -EINVAL; + goto error; + } + + /* Find the playback DMA channel to use. */ + machine_data->dai[0].platforms->name = machine_data->platform_name[0]; + ret = fsl_asoc_get_dma_channel(np, "fsl,playback-dma", + &machine_data->dai[0], + &machine_data->dma_channel_id[0], + &machine_data->dma_id[0]); + if (ret) { + dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n"); + goto error; + } + + /* Find the capture DMA channel to use. */ + machine_data->dai[1].platforms->name = machine_data->platform_name[1]; + ret = fsl_asoc_get_dma_channel(np, "fsl,capture-dma", + &machine_data->dai[1], + &machine_data->dma_channel_id[1], + &machine_data->dma_id[1]); + if (ret) { + dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n"); + goto error; + } + + /* Initialize our DAI data structure. */ + machine_data->dai[0].stream_name = "playback"; + machine_data->dai[1].stream_name = "capture"; + machine_data->dai[0].name = machine_data->dai[0].stream_name; + machine_data->dai[1].name = machine_data->dai[1].stream_name; + + machine_data->card.probe = mpc8610_hpcd_machine_probe; + machine_data->card.remove = mpc8610_hpcd_machine_remove; + machine_data->card.name = pdev->name; /* The platform driver name */ + machine_data->card.owner = THIS_MODULE; + machine_data->card.dev = &pdev->dev; + machine_data->card.num_links = 2; + machine_data->card.dai_link = machine_data->dai; + + /* Register with ASoC */ + ret = snd_soc_register_card(&machine_data->card); + if (ret) { + dev_err(&pdev->dev, "could not register card\n"); + goto error; + } + + of_node_put(codec_np); + + return 0; + +error: + kfree(machine_data); +error_alloc: + of_node_put(codec_np); + return ret; +} + +/** + * mpc8610_hpcd_remove: remove the platform device + * + * This function is called when the platform device is removed. + */ +static void mpc8610_hpcd_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + struct mpc8610_hpcd_data *machine_data = + container_of(card, struct mpc8610_hpcd_data, card); + + snd_soc_unregister_card(card); + kfree(machine_data); +} + +static struct platform_driver mpc8610_hpcd_driver = { + .probe = mpc8610_hpcd_probe, + .remove_new = mpc8610_hpcd_remove, + .driver = { + /* The name must match 'compatible' property in the device tree, + * in lowercase letters. + */ + .name = "snd-soc-mpc8610hpcd", + }, +}; + +/** + * mpc8610_hpcd_init: machine driver initialization. + * + * This function is called when this module is loaded. + */ +static int __init mpc8610_hpcd_init(void) +{ + struct device_node *guts_np; + struct resource res; + + pr_info("Freescale MPC8610 HPCD ALSA SoC machine driver\n"); + + /* Get the physical address of the global utilities registers */ + guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts"); + if (of_address_to_resource(guts_np, 0, &res)) { + pr_err("mpc8610-hpcd: missing/invalid global utilities node\n"); + of_node_put(guts_np); + return -EINVAL; + } + guts_phys = res.start; + of_node_put(guts_np); + + return platform_driver_register(&mpc8610_hpcd_driver); +} + +/** + * mpc8610_hpcd_exit: machine driver exit + * + * This function is called when this driver is unloaded. + */ +static void __exit mpc8610_hpcd_exit(void) +{ + platform_driver_unregister(&mpc8610_hpcd_driver); +} + +module_init(mpc8610_hpcd_init); +module_exit(mpc8610_hpcd_exit); + +MODULE_AUTHOR("Timur Tabi <timur@freescale.com>"); +MODULE_DESCRIPTION("Freescale MPC8610 HPCD ALSA SoC machine driver"); +MODULE_LICENSE("GPL v2"); |