summaryrefslogtreecommitdiff
path: root/sound/soc/fsl/fsl_ssi.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/fsl/fsl_ssi.c')
-rw-r--r--sound/soc/fsl/fsl_ssi.c167
1 files changed, 138 insertions, 29 deletions
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 2eb407fa3b48..4ed2afd47782 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -11,11 +11,15 @@
*/
#include <linux/init.h>
+#include <linux/io.h>
#include <linux/module.h>
#include <linux/interrupt.h>
+#include <linux/clk.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/slab.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <sound/core.h>
@@ -25,6 +29,26 @@
#include <sound/soc.h>
#include "fsl_ssi.h"
+#include "imx-pcm.h"
+
+#ifdef PPC
+#define read_ssi(addr) in_be32(addr)
+#define write_ssi(val, addr) out_be32(addr, val)
+#define write_ssi_mask(addr, clear, set) clrsetbits_be32(addr, clear, set)
+#elif defined ARM
+#define read_ssi(addr) readl(addr)
+#define write_ssi(val, addr) writel(val, addr)
+/*
+ * FIXME: Proper locking should be added at write_ssi_mask caller level
+ * to ensure this register read/modify/write sequence is race free.
+ */
+static inline void write_ssi_mask(u32 __iomem *addr, u32 clear, u32 set)
+{
+ u32 val = readl(addr);
+ val = (val & ~clear) | set;
+ writel(val, addr);
+}
+#endif
/**
* FSLSSI_I2S_RATES: sample rates supported by the I2S
@@ -94,6 +118,13 @@ struct fsl_ssi_private {
struct device_attribute dev_attr;
struct platform_device *pdev;
+ bool new_binding;
+ bool ssi_on_imx;
+ struct clk *clk;
+ struct platform_device *imx_pcm_pdev;
+ struct imx_pcm_dma_params dma_params_tx;
+ struct imx_pcm_dma_params dma_params_rx;
+
struct {
unsigned int rfrc;
unsigned int tfrc;
@@ -145,7 +176,7 @@ static irqreturn_t fsl_ssi_isr(int irq, void *dev_id)
were interrupted for. We mask it with the Interrupt Enable register
so that we only check for events that we're interested in.
*/
- sisr = in_be32(&ssi->sisr) & SIER_FLAGS;
+ sisr = read_ssi(&ssi->sisr) & SIER_FLAGS;
if (sisr & CCSR_SSI_SISR_RFRC) {
ssi_private->stats.rfrc++;
@@ -260,7 +291,7 @@ static irqreturn_t fsl_ssi_isr(int irq, void *dev_id)
/* Clear the bits that we set */
if (sisr2)
- out_be32(&ssi->sisr, sisr2);
+ write_ssi(sisr2, &ssi->sisr);
return ret;
}
@@ -295,7 +326,7 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream,
* SSI needs to be disabled before updating the registers we set
* here.
*/
- clrbits32(&ssi->scr, CCSR_SSI_SCR_SSIEN);
+ write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_SSIEN, 0);
/*
* Program the SSI into I2S Slave Non-Network Synchronous mode.
@@ -303,20 +334,18 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream,
*
* FIXME: Little-endian samples require a different shift dir
*/
- clrsetbits_be32(&ssi->scr,
+ write_ssi_mask(&ssi->scr,
CCSR_SSI_SCR_I2S_MODE_MASK | CCSR_SSI_SCR_SYN,
CCSR_SSI_SCR_TFR_CLK_DIS | CCSR_SSI_SCR_I2S_MODE_SLAVE
| (synchronous ? CCSR_SSI_SCR_SYN : 0));
- out_be32(&ssi->stcr,
- CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TFEN0 |
+ write_ssi(CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TFEN0 |
CCSR_SSI_STCR_TFSI | CCSR_SSI_STCR_TEFS |
- CCSR_SSI_STCR_TSCKP);
+ CCSR_SSI_STCR_TSCKP, &ssi->stcr);
- out_be32(&ssi->srcr,
- CCSR_SSI_SRCR_RXBIT0 | CCSR_SSI_SRCR_RFEN0 |
+ write_ssi(CCSR_SSI_SRCR_RXBIT0 | CCSR_SSI_SRCR_RFEN0 |
CCSR_SSI_SRCR_RFSI | CCSR_SSI_SRCR_REFS |
- CCSR_SSI_SRCR_RSCKP);
+ CCSR_SSI_SRCR_RSCKP, &ssi->srcr);
/*
* The DC and PM bits are only used if the SSI is the clock
@@ -324,7 +353,7 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream,
*/
/* Enable the interrupts and DMA requests */
- out_be32(&ssi->sier, SIER_FLAGS);
+ write_ssi(SIER_FLAGS, &ssi->sier);
/*
* Set the watermark for transmit FIFI 0 and receive FIFO 0. We
@@ -339,9 +368,9 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream,
* make this value larger (and maybe we should), but this way
* data will be written to memory as soon as it's available.
*/
- out_be32(&ssi->sfcsr,
- CCSR_SSI_SFCSR_TFWM0(ssi_private->fifo_depth - 2) |
- CCSR_SSI_SFCSR_RFWM0(ssi_private->fifo_depth - 2));
+ write_ssi(CCSR_SSI_SFCSR_TFWM0(ssi_private->fifo_depth - 2) |
+ CCSR_SSI_SFCSR_RFWM0(ssi_private->fifo_depth - 2),
+ &ssi->sfcsr);
/*
* We keep the SSI disabled because if we enable it, then the
@@ -393,6 +422,12 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream,
ssi_private->second_stream = substream;
}
+ if (ssi_private->ssi_on_imx)
+ snd_soc_dai_set_dma_data(dai, substream,
+ (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ &ssi_private->dma_params_tx :
+ &ssi_private->dma_params_rx);
+
return 0;
}
@@ -417,7 +452,7 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream,
unsigned int sample_size =
snd_pcm_format_width(params_format(hw_params));
u32 wl = CCSR_SSI_SxCCR_WL(sample_size);
- int enabled = in_be32(&ssi->scr) & CCSR_SSI_SCR_SSIEN;
+ int enabled = read_ssi(&ssi->scr) & CCSR_SSI_SCR_SSIEN;
/*
* If we're in synchronous mode, and the SSI is already enabled,
@@ -439,9 +474,9 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream,
/* In synchronous mode, the SSI uses STCCR for capture */
if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ||
ssi_private->cpu_dai_drv.symmetric_rates)
- clrsetbits_be32(&ssi->stccr, CCSR_SSI_SxCCR_WL_MASK, wl);
+ write_ssi_mask(&ssi->stccr, CCSR_SSI_SxCCR_WL_MASK, wl);
else
- clrsetbits_be32(&ssi->srccr, CCSR_SSI_SxCCR_WL_MASK, wl);
+ write_ssi_mask(&ssi->srccr, CCSR_SSI_SxCCR_WL_MASK, wl);
return 0;
}
@@ -466,19 +501,19 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- setbits32(&ssi->scr,
+ write_ssi_mask(&ssi->scr, 0,
CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_TE);
else
- setbits32(&ssi->scr,
+ write_ssi_mask(&ssi->scr, 0,
CCSR_SSI_SCR_SSIEN | CCSR_SSI_SCR_RE);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- clrbits32(&ssi->scr, CCSR_SSI_SCR_TE);
+ write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_TE, 0);
else
- clrbits32(&ssi->scr, CCSR_SSI_SCR_RE);
+ write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_RE, 0);
break;
default:
@@ -510,7 +545,7 @@ static void fsl_ssi_shutdown(struct snd_pcm_substream *substream,
if (!ssi_private->first_stream) {
struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
- clrbits32(&ssi->scr, CCSR_SSI_SCR_SSIEN);
+ write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_SSIEN, 0);
}
}
@@ -622,12 +657,6 @@ static int __devinit fsl_ssi_probe(struct platform_device *pdev)
if (!of_device_is_available(np))
return -ENODEV;
- /* Check for a codec-handle property. */
- if (!of_get_property(np, "codec-handle", NULL)) {
- dev_err(&pdev->dev, "missing codec-handle property\n");
- return -ENODEV;
- }
-
/* We only support the SSI in "I2S Slave" mode */
sprop = of_get_property(np, "fsl,mode", NULL);
if (!sprop || strcmp(sprop, "i2s-slave")) {
@@ -692,6 +721,50 @@ static int __devinit fsl_ssi_probe(struct platform_device *pdev)
/* Older 8610 DTs didn't have the fifo-depth property */
ssi_private->fifo_depth = 8;
+ if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx21-ssi")) {
+ u32 dma_events[2];
+ ssi_private->ssi_on_imx = true;
+
+ ssi_private->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(ssi_private->clk)) {
+ ret = PTR_ERR(ssi_private->clk);
+ dev_err(&pdev->dev, "could not get clock: %d\n", ret);
+ goto error_irq;
+ }
+ clk_prepare_enable(ssi_private->clk);
+
+ /*
+ * We have burstsize be "fifo_depth - 2" to match the SSI
+ * watermark setting in fsl_ssi_startup().
+ */
+ ssi_private->dma_params_tx.burstsize =
+ ssi_private->fifo_depth - 2;
+ ssi_private->dma_params_rx.burstsize =
+ ssi_private->fifo_depth - 2;
+ ssi_private->dma_params_tx.dma_addr =
+ ssi_private->ssi_phys + offsetof(struct ccsr_ssi, stx0);
+ ssi_private->dma_params_rx.dma_addr =
+ ssi_private->ssi_phys + offsetof(struct ccsr_ssi, srx0);
+ /*
+ * TODO: This is a temporary solution and should be changed
+ * to use generic DMA binding later when the helplers get in.
+ */
+ ret = of_property_read_u32_array(pdev->dev.of_node,
+ "fsl,ssi-dma-events", dma_events, 2);
+ if (ret) {
+ dev_err(&pdev->dev, "could not get dma events\n");
+ goto error_clk;
+ }
+ ssi_private->dma_params_tx.dma = dma_events[0];
+ ssi_private->dma_params_rx.dma = dma_events[1];
+
+ ssi_private->dma_params_tx.shared_peripheral =
+ of_device_is_compatible(of_get_parent(np),
+ "fsl,spba-bus");
+ ssi_private->dma_params_rx.shared_peripheral =
+ ssi_private->dma_params_tx.shared_peripheral;
+ }
+
/* Initialize the the device_attribute structure */
dev_attr = &ssi_private->dev_attr;
sysfs_attr_init(&dev_attr->attr);
@@ -715,6 +788,26 @@ static int __devinit fsl_ssi_probe(struct platform_device *pdev)
goto error_dev;
}
+ if (ssi_private->ssi_on_imx) {
+ ssi_private->imx_pcm_pdev =
+ platform_device_register_simple("imx-pcm-audio",
+ -1, NULL, 0);
+ if (IS_ERR(ssi_private->imx_pcm_pdev)) {
+ ret = PTR_ERR(ssi_private->imx_pcm_pdev);
+ goto error_dev;
+ }
+ }
+
+ /*
+ * If codec-handle property is missing from SSI node, we assume
+ * that the machine driver uses new binding which does not require
+ * SSI driver to trigger machine driver's probe.
+ */
+ if (!of_get_property(np, "codec-handle", NULL)) {
+ ssi_private->new_binding = true;
+ goto done;
+ }
+
/* Trigger the machine driver's probe function. The platform driver
* name of the machine driver is taken from /compatible property of the
* device tree. We also pass the address of the CPU DAI driver
@@ -736,15 +829,24 @@ static int __devinit fsl_ssi_probe(struct platform_device *pdev)
goto error_dai;
}
+done:
return 0;
error_dai:
+ if (ssi_private->ssi_on_imx)
+ platform_device_unregister(ssi_private->imx_pcm_pdev);
snd_soc_unregister_dai(&pdev->dev);
error_dev:
dev_set_drvdata(&pdev->dev, NULL);
device_remove_file(&pdev->dev, dev_attr);
+error_clk:
+ if (ssi_private->ssi_on_imx) {
+ clk_disable_unprepare(ssi_private->clk);
+ clk_put(ssi_private->clk);
+ }
+
error_irq:
free_irq(ssi_private->irq, ssi_private);
@@ -764,7 +866,13 @@ static int fsl_ssi_remove(struct platform_device *pdev)
{
struct fsl_ssi_private *ssi_private = dev_get_drvdata(&pdev->dev);
- platform_device_unregister(ssi_private->pdev);
+ if (!ssi_private->new_binding)
+ platform_device_unregister(ssi_private->pdev);
+ if (ssi_private->ssi_on_imx) {
+ platform_device_unregister(ssi_private->imx_pcm_pdev);
+ clk_disable_unprepare(ssi_private->clk);
+ clk_put(ssi_private->clk);
+ }
snd_soc_unregister_dai(&pdev->dev);
device_remove_file(&pdev->dev, &ssi_private->dev_attr);
@@ -779,6 +887,7 @@ static int fsl_ssi_remove(struct platform_device *pdev)
static const struct of_device_id fsl_ssi_ids[] = {
{ .compatible = "fsl,mpc8610-ssi", },
+ { .compatible = "fsl,imx21-ssi", },
{}
};
MODULE_DEVICE_TABLE(of, fsl_ssi_ids);
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-09 04:49:10 +0000