diff options
Diffstat (limited to 'sound/soc/fsl/mpc8610_hpcd.c')
| -rw-r--r-- | sound/soc/fsl/mpc8610_hpcd.c | 631 |
1 files changed, 631 insertions, 0 deletions
diff --git a/sound/soc/fsl/mpc8610_hpcd.c b/sound/soc/fsl/mpc8610_hpcd.c new file mode 100644 index 000000000000..f26c4b2e8b6e --- /dev/null +++ b/sound/soc/fsl/mpc8610_hpcd.c @@ -0,0 +1,631 @@ +/** + * Freescale MPC8610HPCD ALSA SoC Fabric driver + * + * Author: Timur Tabi <timur@freescale.com> + * + * Copyright 2007-2008 Freescale Semiconductor, Inc. This file is licensed + * under the terms of the GNU General Public License version 2. This + * program is licensed "as is" without any warranty of any kind, whether + * express or implied. + */ + +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> +#include <sound/soc.h> +#include <asm/immap_86xx.h> + +#include "../codecs/cs4270.h" +#include "fsl_dma.h" +#include "fsl_ssi.h" + +/** + * mpc8610_hpcd_data: fabric-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_device sound_devdata; + struct snd_soc_dai_link dai; + struct snd_soc_machine machine; + unsigned int dai_format; + unsigned int codec_clk_direction; + unsigned int cpu_clk_direction; + unsigned int clk_frequency; + struct ccsr_guts __iomem *guts; + struct ccsr_ssi __iomem *ssi; + unsigned int ssi_id; /* 0 = SSI1, 1 = SSI2, etc */ + unsigned int ssi_irq; + unsigned int dma_id; /* 0 = DMA1, 1 = DMA2, etc */ + unsigned int dma_irq[2]; + struct ccsr_dma_channel __iomem *dma[2]; + unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/ +}; + +/** + * mpc8610_hpcd_machine_probe: initalize the board + * + * This function is called when platform_device_add() is called. It is used + * to initialize the board-specific hardware. + * + * Here we program the DMACR and PMUXCR registers. + */ +static int mpc8610_hpcd_machine_probe(struct platform_device *sound_device) +{ + struct mpc8610_hpcd_data *machine_data = + sound_device->dev.platform_data; + + /* Program the signal routing between the SSI and the DMA */ + guts_set_dmacr(machine_data->guts, machine_data->dma_id + 1, + machine_data->dma_channel_id[0], CCSR_GUTS_DMACR_DEV_SSI); + guts_set_dmacr(machine_data->guts, machine_data->dma_id + 1, + machine_data->dma_channel_id[1], CCSR_GUTS_DMACR_DEV_SSI); + + guts_set_pmuxcr_dma(machine_data->guts, machine_data->dma_id, + machine_data->dma_channel_id[0], 0); + guts_set_pmuxcr_dma(machine_data->guts, machine_data->dma_id, + machine_data->dma_channel_id[1], 0); + + guts_set_pmuxcr_dma(machine_data->guts, 1, 0, 0); + guts_set_pmuxcr_dma(machine_data->guts, 1, 3, 0); + guts_set_pmuxcr_dma(machine_data->guts, 0, 3, 0); + + switch (machine_data->ssi_id) { + case 0: + clrsetbits_be32(&machine_data->guts->pmuxcr, + CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_SSI); + break; + case 1: + clrsetbits_be32(&machine_data->guts->pmuxcr, + CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_SSI); + break; + } + + 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 = substream->private_data; + struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai; + struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai; + struct mpc8610_hpcd_data *machine_data = + rtd->socdev->dev->platform_data; + int ret = 0; + + /* Tell the CPU driver what the serial protocol is. */ + if (cpu_dai->dai_ops.set_fmt) { + ret = cpu_dai->dai_ops.set_fmt(cpu_dai, + machine_data->dai_format); + if (ret < 0) { + dev_err(substream->pcm->card->dev, + "could not set CPU driver audio format\n"); + return ret; + } + } + + /* Tell the codec driver what the serial protocol is. */ + if (codec_dai->dai_ops.set_fmt) { + ret = codec_dai->dai_ops.set_fmt(codec_dai, + machine_data->dai_format); + if (ret < 0) { + dev_err(substream->pcm->card->dev, + "could not set codec driver audio format\n"); + return ret; + } + } + + /* + * Tell the CPU driver what the clock frequency is, and whether it's a + * slave or master. + */ + if (cpu_dai->dai_ops.set_sysclk) { + ret = cpu_dai->dai_ops.set_sysclk(cpu_dai, 0, + machine_data->clk_frequency, + machine_data->cpu_clk_direction); + if (ret < 0) { + dev_err(substream->pcm->card->dev, + "could not set CPU driver clock parameters\n"); + return ret; + } + } + + /* + * Tell the codec driver what the MCLK frequency is, and whether it's + * a slave or master. + */ + if (codec_dai->dai_ops.set_sysclk) { + ret = codec_dai->dai_ops.set_sysclk(codec_dai, 0, + machine_data->clk_frequency, + machine_data->codec_clk_direction); + if (ret < 0) { + dev_err(substream->pcm->card->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. + */ +int mpc8610_hpcd_machine_remove(struct platform_device *sound_device) +{ + struct mpc8610_hpcd_data *machine_data = + sound_device->dev.platform_data; + + /* Restore the signal routing */ + + guts_set_dmacr(machine_data->guts, machine_data->dma_id + 1, + machine_data->dma_channel_id[0], 0); + guts_set_dmacr(machine_data->guts, machine_data->dma_id + 1, + machine_data->dma_channel_id[1], 0); + + switch (machine_data->ssi_id) { + case 0: + clrsetbits_be32(&machine_data->guts->pmuxcr, + CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_LA); + break; + case 1: + clrsetbits_be32(&machine_data->guts->pmuxcr, + CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI1_LA); + break; + } + + return 0; +} + +/** + * mpc8610_hpcd_ops: ASoC fabric driver operations + */ +static struct snd_soc_ops mpc8610_hpcd_ops = { + .startup = mpc8610_hpcd_startup, +}; + +/** + * mpc8610_hpcd_machine: ASoC machine data + */ +static struct snd_soc_machine mpc8610_hpcd_machine = { + .probe = mpc8610_hpcd_machine_probe, + .remove = mpc8610_hpcd_machine_remove, + .name = "MPC8610 HPCD", + .num_links = 1, +}; + +/** + * mpc8610_hpcd_probe: OF probe function for the fabric driver + * + * This function gets called when an SSI node is found in the device tree. + * + * Although this is a fabric 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. + * + * FIXME: Currently, we only support one DMA controller, so if there are + * multiple SSI nodes with codecs, only the first will be supported. + * + * FIXME: Even if we did support multiple DMA controllers, we have no + * mechanism for assigning DMA controllers and channels to the individual + * SSI devices. We also probably aren't compatible with the generic Elo DMA + * device driver. + */ +static int mpc8610_hpcd_probe(struct of_device *ofdev, + const struct of_device_id *match) +{ + struct device_node *np = ofdev->node; + struct device_node *codec_np = NULL; + struct device_node *guts_np = NULL; + struct device_node *dma_np = NULL; + struct device_node *dma_channel_np = NULL; + const phandle *codec_ph; + const char *sprop; + const u32 *iprop; + struct resource res; + struct platform_device *sound_device = NULL; + struct mpc8610_hpcd_data *machine_data; + struct fsl_ssi_info ssi_info; + struct fsl_dma_info dma_info; + int ret = -ENODEV; + + machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL); + if (!machine_data) + return -ENOMEM; + + memset(&ssi_info, 0, sizeof(ssi_info)); + memset(&dma_info, 0, sizeof(dma_info)); + + ssi_info.dev = &ofdev->dev; + + /* + * We are only interested in SSIs with a codec phandle in them, so let's + * make sure this SSI has one. + */ + codec_ph = of_get_property(np, "codec-handle", NULL); + if (!codec_ph) + goto error; + + codec_np = of_find_node_by_phandle(*codec_ph); + if (!codec_np) + goto error; + + /* The MPC8610 HPCD only knows about the CS4270 codec, so reject + anything else. */ + if (!of_device_is_compatible(codec_np, "cirrus,cs4270")) + goto error; + + /* Get the device ID */ + iprop = of_get_property(np, "cell-index", NULL); + if (!iprop) { + dev_err(&ofdev->dev, "cell-index property not found\n"); + ret = -EINVAL; + goto error; + } + machine_data->ssi_id = *iprop; + ssi_info.id = *iprop; + + /* Get the serial format and clock direction. */ + sprop = of_get_property(np, "fsl,mode", NULL); + if (!sprop) { + dev_err(&ofdev->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; + 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(&ofdev->dev, "codec bus-frequency property " + "is missing or invalid\n"); + ret = -EINVAL; + goto error; + } + machine_data->clk_frequency = *iprop; + } else if (strcasecmp(sprop, "i2s-master") == 0) { + machine_data->dai_format = SND_SOC_DAIFMT_I2S; + 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; + 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; + machine_data->codec_clk_direction = SND_SOC_CLOCK_IN; + machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT; + } else if (strcasecmp(sprop, "rj-master") == 0) { + machine_data->dai_format = SND_SOC_DAIFMT_RIGHT_J; + 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; + 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; + 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; + machine_data->codec_clk_direction = SND_SOC_CLOCK_IN; + machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT; + } else { + dev_err(&ofdev->dev, + "unrecognized fsl,mode property \"%s\"\n", sprop); + ret = -EINVAL; + goto error; + } + + if (!machine_data->clk_frequency) { + dev_err(&ofdev->dev, "unknown clock frequency\n"); + ret = -EINVAL; + goto error; + } + + /* Read the SSI information from the device tree */ + ret = of_address_to_resource(np, 0, &res); + if (ret) { + dev_err(&ofdev->dev, "could not obtain SSI address\n"); + goto error; + } + if (!res.start) { + dev_err(&ofdev->dev, "invalid SSI address\n"); + goto error; + } + ssi_info.ssi_phys = res.start; + + machine_data->ssi = ioremap(ssi_info.ssi_phys, sizeof(struct ccsr_ssi)); + if (!machine_data->ssi) { + dev_err(&ofdev->dev, "could not map SSI address %x\n", + ssi_info.ssi_phys); + ret = -EINVAL; + goto error; + } + ssi_info.ssi = machine_data->ssi; + + + /* Get the IRQ of the SSI */ + machine_data->ssi_irq = irq_of_parse_and_map(np, 0); + if (!machine_data->ssi_irq) { + dev_err(&ofdev->dev, "could not get SSI IRQ\n"); + ret = -EINVAL; + goto error; + } + ssi_info.irq = machine_data->ssi_irq; + + + /* Map the global utilities registers. */ + guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts"); + if (!guts_np) { + dev_err(&ofdev->dev, "could not obtain address of GUTS\n"); + ret = -EINVAL; + goto error; + } + machine_data->guts = of_iomap(guts_np, 0); + of_node_put(guts_np); + if (!machine_data->guts) { + dev_err(&ofdev->dev, "could not map GUTS\n"); + ret = -EINVAL; + goto error; + } + + /* Find the DMA channels to use. For now, we always use the first DMA + controller. */ + for_each_compatible_node(dma_np, NULL, "fsl,mpc8610-dma") { + iprop = of_get_property(dma_np, "cell-index", NULL); + if (iprop && (*iprop == 0)) { + of_node_put(dma_np); + break; + } + } + if (!dma_np) { + dev_err(&ofdev->dev, "could not find DMA node\n"); + ret = -EINVAL; + goto error; + } + machine_data->dma_id = *iprop; + + /* + * Find the DMA channels to use. For now, we always use DMA channel 0 + * for playback, and DMA channel 1 for capture. + */ + while ((dma_channel_np = of_get_next_child(dma_np, dma_channel_np))) { + iprop = of_get_property(dma_channel_np, "cell-index", NULL); + /* Is it DMA channel 0? */ + if (iprop && (*iprop == 0)) { + /* dma_channel[0] and dma_irq[0] are for playback */ + dma_info.dma_channel[0] = of_iomap(dma_channel_np, 0); + dma_info.dma_irq[0] = + irq_of_parse_and_map(dma_channel_np, 0); + machine_data->dma_channel_id[0] = *iprop; + continue; + } + if (iprop && (*iprop == 1)) { + /* dma_channel[1] and dma_irq[1] are for capture */ + dma_info.dma_channel[1] = of_iomap(dma_channel_np, 0); + dma_info.dma_irq[1] = + irq_of_parse_and_map(dma_channel_np, 0); + machine_data->dma_channel_id[1] = *iprop; + continue; + } + } + if (!dma_info.dma_channel[0] || !dma_info.dma_channel[1] || + !dma_info.dma_irq[0] || !dma_info.dma_irq[1]) { + dev_err(&ofdev->dev, "could not find DMA channels\n"); + ret = -EINVAL; + goto error; + } + + dma_info.ssi_stx_phys = ssi_info.ssi_phys + + offsetof(struct ccsr_ssi, stx0); + dma_info.ssi_srx_phys = ssi_info.ssi_phys + + offsetof(struct ccsr_ssi, srx0); + + /* We have the DMA information, so tell the DMA driver what it is */ + if (!fsl_dma_configure(&dma_info)) { + dev_err(&ofdev->dev, "could not instantiate DMA device\n"); + ret = -EBUSY; + goto error; + } + + /* + * Initialize our DAI data structure. We should probably get this + * information from the device tree. + */ + machine_data->dai.name = "CS4270"; + machine_data->dai.stream_name = "CS4270"; + + machine_data->dai.cpu_dai = fsl_ssi_create_dai(&ssi_info); + machine_data->dai.codec_dai = &cs4270_dai; /* The codec_dai we want */ + machine_data->dai.ops = &mpc8610_hpcd_ops; + + mpc8610_hpcd_machine.dai_link = &machine_data->dai; + + /* Allocate a new audio platform device structure */ + sound_device = platform_device_alloc("soc-audio", -1); + if (!sound_device) { + dev_err(&ofdev->dev, "platform device allocation failed\n"); + ret = -ENOMEM; + goto error; + } + + machine_data->sound_devdata.machine = &mpc8610_hpcd_machine; + machine_data->sound_devdata.codec_dev = &soc_codec_device_cs4270; + machine_data->sound_devdata.platform = &fsl_soc_platform; + + sound_device->dev.platform_data = machine_data; + + + /* Set the platform device and ASoC device to point to each other */ + platform_set_drvdata(sound_device, &machine_data->sound_devdata); + + machine_data->sound_devdata.dev = &sound_device->dev; + + + /* Tell ASoC to probe us. This will call mpc8610_hpcd_machine.probe(), + if it exists. */ + ret = platform_device_add(sound_device); + + if (ret) { + dev_err(&ofdev->dev, "platform device add failed\n"); + goto error; + } + + dev_set_drvdata(&ofdev->dev, sound_device); + + return 0; + +error: + of_node_put(codec_np); + of_node_put(guts_np); + of_node_put(dma_np); + of_node_put(dma_channel_np); + + if (sound_device) + platform_device_unregister(sound_device); + + if (machine_data->dai.cpu_dai) + fsl_ssi_destroy_dai(machine_data->dai.cpu_dai); + + if (ssi_info.ssi) + iounmap(ssi_info.ssi); + + if (ssi_info.irq) + irq_dispose_mapping(ssi_info.irq); + + if (dma_info.dma_channel[0]) + iounmap(dma_info.dma_channel[0]); + + if (dma_info.dma_channel[1]) + iounmap(dma_info.dma_channel[1]); + + if (dma_info.dma_irq[0]) + irq_dispose_mapping(dma_info.dma_irq[0]); + + if (dma_info.dma_irq[1]) + irq_dispose_mapping(dma_info.dma_irq[1]); + + if (machine_data->guts) + iounmap(machine_data->guts); + + kfree(machine_data); + + return ret; +} + +/** + * mpc8610_hpcd_remove: remove the OF device + * + * This function is called when the OF device is removed. + */ +static int mpc8610_hpcd_remove(struct of_device *ofdev) +{ + struct platform_device *sound_device = dev_get_drvdata(&ofdev->dev); + struct mpc8610_hpcd_data *machine_data = + sound_device->dev.platform_data; + + platform_device_unregister(sound_device); + + if (machine_data->dai.cpu_dai) + fsl_ssi_destroy_dai(machine_data->dai.cpu_dai); + + if (machine_data->ssi) + iounmap(machine_data->ssi); + + if (machine_data->dma[0]) + iounmap(machine_data->dma[0]); + + if (machine_data->dma[1]) + iounmap(machine_data->dma[1]); + + if (machine_data->dma_irq[0]) + irq_dispose_mapping(machine_data->dma_irq[0]); + + if (machine_data->dma_irq[1]) + irq_dispose_mapping(machine_data->dma_irq[1]); + + if (machine_data->guts) + iounmap(machine_data->guts); + + kfree(machine_data); + sound_device->dev.platform_data = NULL; + + dev_set_drvdata(&ofdev->dev, NULL); + + return 0; +} + +static struct of_device_id mpc8610_hpcd_match[] = { + { + .compatible = "fsl,mpc8610-ssi", + }, + {} +}; +MODULE_DEVICE_TABLE(of, mpc8610_hpcd_match); + +static struct of_platform_driver mpc8610_hpcd_of_driver = { + .owner = THIS_MODULE, + .name = "mpc8610_hpcd", + .match_table = mpc8610_hpcd_match, + .probe = mpc8610_hpcd_probe, + .remove = mpc8610_hpcd_remove, +}; + +/** + * mpc8610_hpcd_init: fabric driver initialization. + * + * This function is called when this module is loaded. + */ +static int __init mpc8610_hpcd_init(void) +{ + int ret; + + printk(KERN_INFO "Freescale MPC8610 HPCD ALSA SoC fabric driver\n"); + + ret = of_register_platform_driver(&mpc8610_hpcd_of_driver); + + if (ret) + printk(KERN_ERR + "mpc8610-hpcd: failed to register platform driver\n"); + + return ret; +} + +/** + * mpc8610_hpcd_exit: fabric driver exit + * + * This function is called when this driver is unloaded. + */ +static void __exit mpc8610_hpcd_exit(void) +{ + of_unregister_platform_driver(&mpc8610_hpcd_of_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 fabric driver"); +MODULE_LICENSE("GPL"); |