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ASoC: add support for the Freescale P1022 DS reference board

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The Freescale P1022 is a dual-core e500-based SOC with multimedia capabilities,
specifically the same SSI audio controller on the MPC8610.  The P1022 DS
reference board includes a P1022 and a Wolfson Microelectronics WM8776
codec.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Timur Tabi 2010-08-19 17:11:40 -05:00 committed by Mark Brown
parent b9c1261db4
commit 27ef3744f8
3 changed files with 614 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
sound/soc/fsl/Kconfig
View file

@ -1,24 +1,36 @@
config SND_MPC52xx_DMA
tristate
# ASoC platform support for the Freescale MPC8610 SOC. This compiles drivers
# for the SSI and the Elo DMA controller. You will still need to select
# a platform driver and a codec driver.
config SND_SOC_MPC8610
# ASoC platform support for the Freescale PowerPC SOCs that have an SSI and
# an Elo DMA controller, such as the MPC8610 and P1022. You will still need to
# select a platform driver and a codec driver.
config SND_SOC_POWERPC_SSI
tristate
depends on MPC8610
depends on FSL_SOC
config SND_SOC_MPC8610_HPCD
tristate "ALSA SoC support for the Freescale MPC8610 HPCD board"
# I2C is necessary for the CS4270 driver
depends on MPC8610_HPCD && I2C
select SND_SOC_MPC8610
select SND_SOC_POWERPC_SSI
select SND_SOC_CS4270
select SND_SOC_CS4270_VD33_ERRATA
default y if MPC8610_HPCD
help
Say Y if you want to enable audio on the Freescale MPC8610 HPCD.
config SND_SOC_P1022_DS
tristate "ALSA SoC support for the Freescale P1022 DS board"
# I2C is necessary for the WM8776 driver
depends on P1022_DS && I2C
select SND_SOC_POWERPC_SSI
select SND_SOC_WM8776
default y if P1022_DS
help
Say Y if you want to enable audio on the Freescale P1022 DS board.
This will also include the Wolfson Microelectronics WM8776 codec
driver.
config SND_SOC_MPC5200_I2S
tristate "Freescale MPC5200 PSC in I2S mode driver"
depends on PPC_MPC52xx && PPC_BESTCOMM

8
sound/soc/fsl/Makefile
View file

@ -2,10 +2,14 @@
snd-soc-mpc8610-hpcd-objs := mpc8610_hpcd.o
obj-$(CONFIG_SND_SOC_MPC8610_HPCD) += snd-soc-mpc8610-hpcd.o
# MPC8610 Platform Support
# P1022 DS Machine Support
snd-soc-p1022-ds-objs := p1022_ds.o
obj-$(CONFIG_SND_SOC_P1022_DS) += snd-soc-p1022-ds.o
# Freescale PowerPC SSI/DMA Platform Support
snd-soc-fsl-ssi-objs := fsl_ssi.o
snd-soc-fsl-dma-objs := fsl_dma.o
obj-$(CONFIG_SND_SOC_MPC8610) += snd-soc-fsl-ssi.o snd-soc-fsl-dma.o
obj-$(CONFIG_SND_SOC_POWERPC_SSI) += snd-soc-fsl-ssi.o snd-soc-fsl-dma.o
# MPC5200 Platform Support
obj-$(CONFIG_SND_MPC52xx_DMA) += mpc5200_dma.o

590
sound/soc/fsl/p1022_ds.c Normal file
View file

@ -0,0 +1,590 @@
/**
* Freescale P1022DS ALSA SoC Machine driver
*
* Author: Timur Tabi <timur@freescale.com>
*
* Copyright 2010 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/slab.h>
#include <sound/soc.h>
#include <asm/fsl_guts.h>
#include "fsl_dma.h"
#include "fsl_ssi.h"
/* P1022-specific PMUXCR and DMUXCR bit definitions */
#define CCSR_GUTS_PMUXCR_UART0_I2C1_MASK 0x0001c000
#define CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI 0x00010000
#define CCSR_GUTS_PMUXCR_UART0_I2C1_SSI 0x00018000
#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK 0x00000c00
#define CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI 0x00000000
#define CCSR_GUTS_DMUXCR_PAD 1 /* DMA controller/channel set to pad */
#define CCSR_GUTS_DMUXCR_SSI 2 /* DMA controller/channel set to SSI */
/*
* Set the DMACR register in the GUTS
*
* The DMACR register determines the source of initiated transfers for each
* channel on each DMA controller. Rather than have a bunch of repetitive
* macros for the bit patterns, we just have a function that calculates
* them.
*
* guts: Pointer to GUTS structure
* co: The DMA controller (0 or 1)
* ch: The channel on the DMA controller (0, 1, 2, or 3)
* device: The device to set as the target (CCSR_GUTS_DMUXCR_xxx)
*/
static inline void guts_set_dmuxcr(struct ccsr_guts_85xx __iomem *guts,
unsigned int co, unsigned int ch, unsigned int device)
{
unsigned int shift = 16 + (8 * (1 - co) + 2 * (3 - ch));
clrsetbits_be32(&guts->dmuxcr, 3 << shift, device << shift);
}
/* There's only one global utilities register */
static phys_addr_t guts_phys;
#define DAI_NAME_SIZE 32
/**
* machine_data: machine-specific ASoC device data
*
* This structure contains data for a single sound platform device on an
* P1022 DS. Some of the data is taken from the device tree.
*/
struct machine_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_name[DAI_NAME_SIZE];
char platform_name[2][DAI_NAME_SIZE]; /* One for each DMA channel */
};
/**
* p1022_ds_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 p1022_ds_machine_probe(struct platform_device *sound_device)
{
struct snd_soc_card *card = platform_get_drvdata(sound_device);
struct machine_data *mdata =
container_of(card, struct machine_data, card);
struct ccsr_guts_85xx __iomem *guts;
guts = ioremap(guts_phys, sizeof(struct ccsr_guts_85xx));
if (!guts) {
dev_err(card->dev, "could not map global utilities\n");
return -ENOMEM;
}
/* Enable SSI Tx signal */
clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK,
CCSR_GUTS_PMUXCR_UART0_I2C1_UART0_SSI);
/* Enable SSI Rx signal */
clrsetbits_be32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK,
CCSR_GUTS_PMUXCR_SSI_DMA_TDM_SSI);
/* Enable DMA Channel for SSI */
guts_set_dmuxcr(guts, mdata->dma_id[0], mdata->dma_channel_id[0],
CCSR_GUTS_DMUXCR_SSI);
guts_set_dmuxcr(guts, mdata->dma_id[1], mdata->dma_channel_id[1],
CCSR_GUTS_DMUXCR_SSI);
iounmap(guts);
return 0;
}
/**
* p1022_ds_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 p1022_ds_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct machine_data *mdata =
container_of(rtd->card, struct machine_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(rtd->codec_dai, mdata->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(rtd->codec_dai, 0, mdata->clk_frequency,
mdata->codec_clk_direction);
if (ret < 0) {
dev_err(dev, "could not set codec driver clock params\n");
return ret;
}
return 0;
}
/**
* p1022_ds_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 p1022_ds_machine_remove(struct platform_device *sound_device)
{
struct snd_soc_card *card = platform_get_drvdata(sound_device);
struct machine_data *mdata =
container_of(card, struct machine_data, card);
struct ccsr_guts_85xx __iomem *guts;
guts = ioremap(guts_phys, sizeof(struct ccsr_guts_85xx));
if (!guts) {
dev_err(card->dev, "could not map global utilities\n");
return -ENOMEM;
}
/* Restore the signal routing */
clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_UART0_I2C1_MASK);
clrbits32(&guts->pmuxcr, CCSR_GUTS_PMUXCR_SSI_DMA_TDM_MASK);
guts_set_dmuxcr(guts, mdata->dma_id[0], mdata->dma_channel_id[0], 0);
guts_set_dmuxcr(guts, mdata->dma_id[1], mdata->dma_channel_id[1], 0);
iounmap(guts);
return 0;
}
/**
* p1022_ds_ops: ASoC machine driver operations
*/
static struct snd_soc_ops p1022_ds_ops = {
.startup = p1022_ds_startup,
};
/**
* get_node_by_phandle_name - get a node by its phandle name
*
* This function takes a node, the name of a property in that node, and a
* compatible string. Assuming the property is a phandle to another node,
* it returns that node, (optionally) if that node is compatible.
*
* If the property is not a phandle, or the node it points to is not compatible
* with the specific string, then NULL is returned.
*/
static struct device_node *get_node_by_phandle_name(struct device_node *np,
const char *name, const char *compatible)
{
np = of_parse_phandle(np, name, 0);
if (!np)
return NULL;
if (!of_device_is_compatible(np, compatible)) {
of_node_put(np);
return NULL;
}
return np;
}
/**
* get_parent_cell_index -- return the cell-index of the parent of a node
*
* Return the value of the cell-index property of the parent of the given
* node. This is used for DMA channel nodes that need to know the DMA ID
* of the controller they are on.
*/
static int get_parent_cell_index(struct device_node *np)
{
struct device_node *parent = of_get_parent(np);
const u32 *iprop;
int ret = -1;
if (!parent)
return -1;
iprop = of_get_property(parent, "cell-index", NULL);
if (iprop)
ret = *iprop;
of_node_put(parent);
return ret;
}
/**
* codec_node_dev_name - determine the dev_name for a codec node
*
* This function determines the dev_name for an I2C node. This is the name
* that would be returned by dev_name() if this device_node were part of a
* 'struct device' It's ugly and hackish, but it works.
*
* The dev_name for such devices include the bus number and I2C address. For
* example, "cs4270-codec.0-004f".
*/
static int codec_node_dev_name(struct device_node *np, char *buf, size_t len)
{
const u32 *iprop;
int bus, addr;
char temp[DAI_NAME_SIZE];
of_modalias_node(np, temp, DAI_NAME_SIZE);
iprop = of_get_property(np, "reg", NULL);
if (!iprop)
return -EINVAL;
addr = *iprop;
bus = get_parent_cell_index(np);
if (bus < 0)
return bus;
snprintf(buf, len, "%s-codec.%u-%04x", temp, bus, addr);
return 0;
}
static int get_dma_channel(struct device_node *ssi_np,
const char *compatible,
struct snd_soc_dai_link *dai,
unsigned int *dma_channel_id,
unsigned int *dma_id)
{
struct resource res;
struct device_node *dma_channel_np;
const u32 *iprop;
int ret;
dma_channel_np = get_node_by_phandle_name(ssi_np, compatible,
"fsl,ssi-dma-channel");
if (!dma_channel_np)
return -EINVAL;
/* Determine the dev_name for the device_node. This code mimics the
* behavior of of_device_make_bus_id(). We need this because ASoC uses
* the dev_name() of the device to match the platform (DMA) device with
* the CPU (SSI) device. It's all ugly and hackish, but it works (for
* now).
*
* dai->platform name should already point to an allocated buffer.
*/
ret = of_address_to_resource(dma_channel_np, 0, &res);
if (ret)
return ret;
snprintf((char *)dai->platform_name, DAI_NAME_SIZE, "%llx.%s",
(unsigned long long) res.start, dma_channel_np->name);
iprop = of_get_property(dma_channel_np, "cell-index", NULL);
if (!iprop) {
of_node_put(dma_channel_np);
return -EINVAL;
}
*dma_channel_id = *iprop;
*dma_id = get_parent_cell_index(dma_channel_np);
of_node_put(dma_channel_np);
return 0;
}
/**
* p1022_ds_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 p1022_ds_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 =
container_of(dev, struct platform_device, dev);
struct device_node *np = ssi_pdev->dev.of_node;
struct device_node *codec_np = NULL;
struct platform_device *sound_device = NULL;
struct machine_data *mdata;
int ret = -ENODEV;
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, "could not find codec node\n");
return -EINVAL;
}
mdata = kzalloc(sizeof(struct machine_data), GFP_KERNEL);
if (!mdata)
return -ENOMEM;
mdata->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev);
mdata->dai[0].ops = &p1022_ds_ops;
/* Determine the codec name, it will be used as the codec DAI name */
ret = codec_node_dev_name(codec_np, mdata->codec_name, DAI_NAME_SIZE);
if (ret) {
dev_err(&pdev->dev, "invalid codec node %s\n",
codec_np->full_name);
ret = -EINVAL;
goto error;
}
mdata->dai[0].codec_name = mdata->codec_name;
/* We register two DAIs per SSI, one for playback and the other for
* capture. We support codecs that have separate DAIs for both playback
* and capture.
*/
memcpy(&mdata->dai[1], &mdata->dai[0], sizeof(struct snd_soc_dai_link));
/* The DAI names from the codec (snd_soc_dai_driver.name) */
mdata->dai[0].codec_dai_name = "wm8776-hifi-playback";
mdata->dai[1].codec_dai_name = "wm8776-hifi-capture";
/* 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;
}
mdata->ssi_id = *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) {
mdata->dai_format = SND_SOC_DAIFMT_I2S;
mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
mdata->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;
}
mdata->clk_frequency = *iprop;
} else if (strcasecmp(sprop, "i2s-master") == 0) {
mdata->dai_format = SND_SOC_DAIFMT_I2S;
mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
} else if (strcasecmp(sprop, "lj-slave") == 0) {
mdata->dai_format = SND_SOC_DAIFMT_LEFT_J;
mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
} else if (strcasecmp(sprop, "lj-master") == 0) {
mdata->dai_format = SND_SOC_DAIFMT_LEFT_J;
mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
} else if (strcasecmp(sprop, "rj-slave") == 0) {
mdata->dai_format = SND_SOC_DAIFMT_RIGHT_J;
mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
} else if (strcasecmp(sprop, "rj-master") == 0) {
mdata->dai_format = SND_SOC_DAIFMT_RIGHT_J;
mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
} else if (strcasecmp(sprop, "ac97-slave") == 0) {
mdata->dai_format = SND_SOC_DAIFMT_AC97;
mdata->codec_clk_direction = SND_SOC_CLOCK_OUT;
mdata->cpu_clk_direction = SND_SOC_CLOCK_IN;
} else if (strcasecmp(sprop, "ac97-master") == 0) {
mdata->dai_format = SND_SOC_DAIFMT_AC97;
mdata->codec_clk_direction = SND_SOC_CLOCK_IN;
mdata->cpu_clk_direction = SND_SOC_CLOCK_OUT;
} else {
dev_err(&pdev->dev,
"unrecognized fsl,mode property '%s'\n", sprop);
ret = -EINVAL;
goto error;
}
if (!mdata->clk_frequency) {
dev_err(&pdev->dev, "unknown clock frequency\n");
ret = -EINVAL;
goto error;
}
/* Find the playback DMA channel to use. */
mdata->dai[0].platform_name = mdata->platform_name[0];
ret = get_dma_channel(np, "fsl,playback-dma", &mdata->dai[0],
&mdata->dma_channel_id[0],
&mdata->dma_id[0]);
if (ret) {
dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n");
goto error;
}
/* Find the capture DMA channel to use. */
mdata->dai[1].platform_name = mdata->platform_name[1];
ret = get_dma_channel(np, "fsl,capture-dma", &mdata->dai[1],
&mdata->dma_channel_id[1],
&mdata->dma_id[1]);
if (ret) {
dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n");
goto error;
}
/* Initialize our DAI data structure. */
mdata->dai[0].stream_name = "playback";
mdata->dai[1].stream_name = "capture";
mdata->dai[0].name = mdata->dai[0].stream_name;
mdata->dai[1].name = mdata->dai[1].stream_name;
mdata->card.probe = p1022_ds_machine_probe;
mdata->card.remove = p1022_ds_machine_remove;
mdata->card.name = pdev->name; /* The platform driver name */
mdata->card.num_links = 2;
mdata->card.dai_link = mdata->dai;
/* Allocate a new audio platform device structure */
sound_device = platform_device_alloc("soc-audio", -1);
if (!sound_device) {
dev_err(&pdev->dev, "platform device alloc failed\n");
ret = -ENOMEM;
goto error;
}
/* Associate the card data with the sound device */
platform_set_drvdata(sound_device, &mdata->card);
/* Register with ASoC */
ret = platform_device_add(sound_device);
if (ret) {
dev_err(&pdev->dev, "platform device add failed\n");
goto error;
}
of_node_put(codec_np);
return 0;
error:
of_node_put(codec_np);
if (sound_device)
platform_device_unregister(sound_device);
kfree(mdata);
return ret;
}
/**
* p1022_ds_remove: remove the platform device
*
* This function is called when the platform device is removed.
*/
static int __devexit p1022_ds_remove(struct platform_device *pdev)
{
struct platform_device *sound_device = dev_get_drvdata(&pdev->dev);
struct snd_soc_card *card = platform_get_drvdata(sound_device);
struct machine_data *mdata =
container_of(card, struct machine_data, card);
platform_device_unregister(sound_device);
kfree(mdata);
sound_device->dev.platform_data = NULL;
dev_set_drvdata(&pdev->dev, NULL);
return 0;
}
static struct platform_driver p1022_ds_driver = {
.probe = p1022_ds_probe,
.remove = __devexit_p(p1022_ds_remove),
.driver = {
/* The name must match the 'model' property in the device tree,
* in lowercase letters, but only the part after that last
* comma. This is because some model properties have a "fsl,"
* prefix.
*/
.name = "snd-soc-p1022",
.owner = THIS_MODULE,
},
};
/**
* p1022_ds_init: machine driver initialization.
*
* This function is called when this module is loaded.
*/
static int __init p1022_ds_init(void)
{
struct device_node *guts_np;
struct resource res;
pr_info("Freescale P1022 DS ALSA SoC machine driver\n");
/* Get the physical address of the global utilities registers */
guts_np = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts");
if (of_address_to_resource(guts_np, 0, &res)) {
pr_err("p1022-ds: missing/invalid global utilities node\n");
return -EINVAL;
}
guts_phys = res.start;
of_node_put(guts_np);
return platform_driver_register(&p1022_ds_driver);
}
/**
* p1022_ds_exit: machine driver exit
*
* This function is called when this driver is unloaded.
*/
static void __exit p1022_ds_exit(void)
{
platform_driver_unregister(&p1022_ds_driver);
}
module_init(p1022_ds_init);
module_exit(p1022_ds_exit);
MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
MODULE_DESCRIPTION("Freescale P1022 DS ALSA SoC machine driver");
MODULE_LICENSE("GPL v2");