[alsa-devel] [PATCH v2 03/11] ASoC: davinci-mcasp: Add DMA register locations to DT
jsarha at ti.com
jsarha at ti.com
Tue Sep 17 11:26:02 CEST 2013
From: Jyri Sarha <jsarha at ti.com>
This patch adds DMA register location to mcasp DT bindings. On am33xx
SoCs the McASP registers are mapped trough L4 interconnect, which is
not accessible by the DMA controller, so McASP data port is mapped
trough L3 to a different location.
Signed-off-by: Hebbar, Gururaja <gururaja.hebbar at ti.com>
Signed-off-by: Darren Etheridge <detheridge at ti.com>
Signed-off-by: Jyri Sarha <jsarha at ti.com>
---
.../bindings/sound/davinci-mcasp-audio.txt | 8 ++-
sound/soc/davinci/davinci-mcasp.c | 59 +++++++++++++-------
2 files changed, 46 insertions(+), 21 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
index 374e145..63b67ae 100644
--- a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
+++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
@@ -6,7 +6,11 @@ Required properties:
"ti,da830-mcasp-audio" : for both DA830 & DA850 platforms
"ti,omap2-mcasp-audio" : for OMAP2 platforms (TI81xx, AM33xx)
-- reg : Should contain McASP registers offset and length
+- reg : Should contain McASP registers address and length for mpu and
+ optionally for dma controller access.
+- reg-names : The mandatory reg-range must be named "mpu" and the optional DMA
+ reg-range must be named "dma". For backward compatibility it is
+ good to keep "mpu" first in the list.
- interrupts : Interrupt number for McASP
- op-mode : I2S/DIT ops mode.
- tdm-slots : Slots for TDM operation.
@@ -15,7 +19,6 @@ Required properties:
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
@@ -31,6 +34,7 @@ mcasp0: mcasp0 at 1d00000 {
#address-cells = <1>;
#size-cells = <0>;
reg = <0x100000 0x3000>;
+ reg-names "mpu";
interrupts = <82 83>;
op-mode = <0>; /* MCASP_IIS_MODE */
tdm-slots = <2>;
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index 32ddb7f..a056fc5 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -1001,18 +1001,40 @@ static const struct snd_soc_component_driver davinci_mcasp_component = {
.name = "davinci-mcasp",
};
+/* Some HW specific values and defaults. The rest is filled in from DT. */
+static struct snd_platform_data dm646x_mcasp_pdata = {
+ .tx_dma_offset = 0x400,
+ .rx_dma_offset = 0x400,
+ .asp_chan_q = EVENTQ_0,
+ .version = MCASP_VERSION_1,
+};
+
+static struct snd_platform_data da830_mcasp_pdata = {
+ .tx_dma_offset = 0x2000,
+ .rx_dma_offset = 0x2000,
+ .asp_chan_q = EVENTQ_0,
+ .version = MCASP_VERSION_2,
+};
+
+static struct snd_platform_data omap2_mcasp_pdata = {
+ .tx_dma_offset = 0,
+ .rx_dma_offset = 0,
+ .asp_chan_q = EVENTQ_0,
+ .version = MCASP_VERSION_3,
+};
+
static const struct of_device_id mcasp_dt_ids[] = {
{
.compatible = "ti,dm646x-mcasp-audio",
- .data = (void *)MCASP_VERSION_1,
+ .data = &dm646x_mcasp_pdata,
},
{
.compatible = "ti,da830-mcasp-audio",
- .data = (void *)MCASP_VERSION_2,
+ .data = &da830_mcasp_pdata,
},
{
.compatible = "ti,omap2-mcasp-audio",
- .data = (void *)MCASP_VERSION_3,
+ .data = &omap2_mcasp_pdata,
},
{ /* sentinel */ }
};
@@ -1035,20 +1057,13 @@ static struct snd_platform_data *davinci_mcasp_set_pdata_from_of(
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;
- }
+ pdata = (struct snd_platform_data *) match->data;
} 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;
@@ -1145,10 +1160,15 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
return -EINVAL;
}
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
if (!mem) {
- dev_err(&pdev->dev, "no mem resource?\n");
- return -ENODEV;
+ dev_warn(dev->dev,
+ "\"mpu\" mem resource not found, using index 0\n");
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem) {
+ dev_err(&pdev->dev, "no mem resource?\n");
+ return -ENODEV;
+ }
}
ioarea = devm_request_mem_region(&pdev->dev, mem->start,
@@ -1182,13 +1202,16 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
dev->rxnumevt = pdata->rxnumevt;
dev->dev = &pdev->dev;
+ dma = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dma");
+ if (!dma)
+ dma = mem;
+
dma_data = &dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK];
dma_data->asp_chan_q = pdata->asp_chan_q;
dma_data->ram_chan_q = pdata->ram_chan_q;
dma_data->sram_pool = pdata->sram_pool;
dma_data->sram_size = pdata->sram_size_playback;
- dma_data->dma_addr = (dma_addr_t) (pdata->tx_dma_offset +
- mem->start);
+ dma_data->dma_addr = dma->start + pdata->tx_dma_offset;
/* first TX, then RX */
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
@@ -1205,8 +1228,7 @@ static int davinci_mcasp_probe(struct platform_device *pdev)
dma_data->ram_chan_q = pdata->ram_chan_q;
dma_data->sram_pool = pdata->sram_pool;
dma_data->sram_size = pdata->sram_size_capture;
- dma_data->dma_addr = (dma_addr_t)(pdata->rx_dma_offset +
- mem->start);
+ dma_data->dma_addr = dma->start + pdata->rx_dma_offset;
res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
if (!res) {
@@ -1266,4 +1288,3 @@ module_platform_driver(davinci_mcasp_driver);
MODULE_AUTHOR("Steve Chen");
MODULE_DESCRIPTION("TI DAVINCI McASP SoC Interface");
MODULE_LICENSE("GPL");
-
--
1.7.9.5
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