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ASoC: Davinci: McASP: add device tree support for McASP

Add device tree probe for McASP driver.

Note:
DMA parameters are not populated from DT and will be done later.

Signed-off-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Hebbar, Gururaja 2012-08-27 18:56:42 +05:30 committed by Mark Brown
parent 896f66b7de
commit 3e3b8c3415
2 changed files with 167 additions and 1 deletions

View File

@ -0,0 +1,44 @@
Texas Instruments McASP controller
Required properties:
- compatible :
"ti,dm646x-mcasp-audio" : for DM646x platforms
"ti,da830-mcasp-audio" : for both DA830 & DA850 platforms
- reg : Should contain McASP registers offset and length
- interrupts : Interrupt number for McASP
- op-mode : I2S/DIT ops mode.
- tdm-slots : Slots for TDM operation.
- num-serializer : Serializers used by McASP.
- serial-dir : A list of serializer pin mode. The list number should be equal
to "num-serializer" parameter. Each entry is a number indication
serializer pin direction. (0 - INACTIVE, 1 - TX, 2 - RX)
Optional properties:
- ti,hwmods : Must be "mcasp<n>", n is controller instance starting 0
- tx-num-evt : FIFO levels.
- rx-num-evt : FIFO levels.
- sram-size-playback : size of sram to be allocated during playback
- sram-size-capture : size of sram to be allocated during capture
Example:
mcasp0: mcasp0@1d00000 {
compatible = "ti,da830-mcasp-audio";
#address-cells = <1>;
#size-cells = <0>;
reg = <0x100000 0x3000>;
interrupts = <82 83>;
op-mode = <0>; /* MCASP_IIS_MODE */
tdm-slots = <2>;
num-serializer = <16>;
serial-dir = <
0 0 0 0 /* 0: INACTIVE, 1: TX, 2: RX */
0 0 0 0
0 0 0 1
2 0 0 0 >;
tx-num-evt = <1>;
rx-num-evt = <1>;
};

View File

@ -22,6 +22,9 @@
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
@ -856,6 +859,114 @@ static struct snd_soc_dai_driver davinci_mcasp_dai[] = {
};
static const struct of_device_id mcasp_dt_ids[] = {
{
.compatible = "ti,dm646x-mcasp-audio",
.data = (void *)MCASP_VERSION_1,
},
{
.compatible = "ti,da830-mcasp-audio",
.data = (void *)MCASP_VERSION_2,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mcasp_dt_ids);
static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct snd_platform_data *pdata = NULL;
const struct of_device_id *match =
of_match_device(of_match_ptr(mcasp_dt_ids), &pdev->dev);
const u32 *of_serial_dir32;
u8 *of_serial_dir;
u32 val;
int i, ret = 0;
if (pdev->dev.platform_data) {
pdata = pdev->dev.platform_data;
return pdata;
} else if (match) {
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
ret = -ENOMEM;
goto nodata;
}
} else {
/* control shouldn't reach here. something is wrong */
ret = -EINVAL;
goto nodata;
}
if (match->data)
pdata->version = (u8)((int)match->data);
ret = of_property_read_u32(np, "op-mode", &val);
if (ret >= 0)
pdata->op_mode = val;
ret = of_property_read_u32(np, "tdm-slots", &val);
if (ret >= 0)
pdata->tdm_slots = val;
ret = of_property_read_u32(np, "num-serializer", &val);
if (ret >= 0)
pdata->num_serializer = val;
of_serial_dir32 = of_get_property(np, "serial-dir", &val);
val /= sizeof(u32);
if (val != pdata->num_serializer) {
dev_err(&pdev->dev,
"num-serializer(%d) != serial-dir size(%d)\n",
pdata->num_serializer, val);
ret = -EINVAL;
goto nodata;
}
if (of_serial_dir32) {
of_serial_dir = devm_kzalloc(&pdev->dev,
(sizeof(*of_serial_dir) * val),
GFP_KERNEL);
if (!of_serial_dir) {
ret = -ENOMEM;
goto nodata;
}
for (i = 0; i < pdata->num_serializer; i++)
of_serial_dir[i] = be32_to_cpup(&of_serial_dir32[i]);
pdata->serial_dir = of_serial_dir;
}
ret = of_property_read_u32(np, "tx-num-evt", &val);
if (ret >= 0)
pdata->txnumevt = val;
ret = of_property_read_u32(np, "rx-num-evt", &val);
if (ret >= 0)
pdata->rxnumevt = val;
ret = of_property_read_u32(np, "sram-size-playback", &val);
if (ret >= 0)
pdata->sram_size_playback = val;
ret = of_property_read_u32(np, "sram-size-capture", &val);
if (ret >= 0)
pdata->sram_size_capture = val;
return pdata;
nodata:
if (ret < 0) {
dev_err(&pdev->dev, "Error populating platform data, err %d\n",
ret);
pdata = NULL;
}
return pdata;
}
static int davinci_mcasp_probe(struct platform_device *pdev)
{
struct davinci_pcm_dma_params *dma_data;
@ -864,11 +975,22 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
struct davinci_audio_dev *dev;
int ret;
if (!pdev->dev.platform_data && !pdev->dev.of_node) {
dev_err(&pdev->dev, "No platform data supplied\n");
return -EINVAL;
}
dev = devm_kzalloc(&pdev->dev, sizeof(struct davinci_audio_dev),
GFP_KERNEL);
if (!dev)
return -ENOMEM;
pdata = davinci_mcasp_set_pdata_from_of(pdev);
if (!pdata) {
dev_err(&pdev->dev, "no platform data\n");
return -EINVAL;
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "no mem resource?\n");
@ -882,7 +1004,6 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
return -EBUSY;
}
pdata = pdev->dev.platform_data;
pm_runtime_enable(&pdev->dev);
ret = pm_runtime_get_sync(&pdev->dev);
@ -980,6 +1101,7 @@ static struct platform_driver davinci_mcasp_driver = {
.driver = {
.name = "davinci-mcasp",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(mcasp_dt_ids),
},
};