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.c500
1 files changed, 373 insertions, 127 deletions
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 2f2d837df07f..5cf626c4dc96 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -8,6 +8,26 @@
* 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.
+ *
+ *
+ * Some notes why imx-pcm-fiq is used instead of DMA on some boards:
+ *
+ * The i.MX SSI core has some nasty limitations in AC97 mode. While most
+ * sane processor vendors have a FIFO per AC97 slot, the i.MX has only
+ * one FIFO which combines all valid receive slots. We cannot even select
+ * which slots we want to receive. The WM9712 with which this driver
+ * was developed with always sends GPIO status data in slot 12 which
+ * we receive in our (PCM-) data stream. The only chance we have is to
+ * manually skip this data in the FIQ handler. With sampling rates different
+ * from 48000Hz not every frame has valid receive data, so the ratio
+ * between pcm data and GPIO status data changes. Our FIQ handler is not
+ * able to handle this, hence this driver only works with 48000Hz sampling
+ * rate.
+ * Reading and writing AC97 registers is another challenge. The core
+ * provides us status bits when the read register is updated with *another*
+ * value. When we read the same register two times (and the register still
+ * contains the same value) these status bits are not set. We work
+ * around this by not polling these bits but only wait a fixed delay.
*/
#include <linux/init.h>
@@ -36,7 +56,7 @@
#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
+#else
#define read_ssi(addr) readl(addr)
#define write_ssi(val, addr) writel(val, addr)
/*
@@ -121,11 +141,14 @@ struct fsl_ssi_private {
bool new_binding;
bool ssi_on_imx;
+ bool imx_ac97;
+ bool use_dma;
struct clk *clk;
struct snd_dmaengine_dai_dma_data dma_params_tx;
struct snd_dmaengine_dai_dma_data dma_params_rx;
struct imx_dma_data filter_data_tx;
struct imx_dma_data filter_data_rx;
+ struct imx_pcm_fiq_params fiq_params;
struct {
unsigned int rfrc;
@@ -298,6 +321,102 @@ static irqreturn_t fsl_ssi_isr(int irq, void *dev_id)
return ret;
}
+static int fsl_ssi_setup(struct fsl_ssi_private *ssi_private)
+{
+ struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
+ u8 i2s_mode;
+ u8 wm;
+ int synchronous = ssi_private->cpu_dai_drv.symmetric_rates;
+
+ if (ssi_private->imx_ac97)
+ i2s_mode = CCSR_SSI_SCR_I2S_MODE_NORMAL | CCSR_SSI_SCR_NET;
+ else
+ i2s_mode = CCSR_SSI_SCR_I2S_MODE_SLAVE;
+
+ /*
+ * Section 16.5 of the MPC8610 reference manual says that the SSI needs
+ * to be disabled before updating the registers we set here.
+ */
+ write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_SSIEN, 0);
+
+ /*
+ * Program the SSI into I2S Slave Non-Network Synchronous mode. Also
+ * enable the transmit and receive FIFO.
+ *
+ * FIXME: Little-endian samples require a different shift dir
+ */
+ write_ssi_mask(&ssi->scr,
+ CCSR_SSI_SCR_I2S_MODE_MASK | CCSR_SSI_SCR_SYN,
+ CCSR_SSI_SCR_TFR_CLK_DIS |
+ i2s_mode |
+ (synchronous ? CCSR_SSI_SCR_SYN : 0));
+
+ write_ssi(CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TFEN0 |
+ CCSR_SSI_STCR_TFSI | CCSR_SSI_STCR_TEFS |
+ CCSR_SSI_STCR_TSCKP, &ssi->stcr);
+
+ write_ssi(CCSR_SSI_SRCR_RXBIT0 | CCSR_SSI_SRCR_RFEN0 |
+ CCSR_SSI_SRCR_RFSI | CCSR_SSI_SRCR_REFS |
+ CCSR_SSI_SRCR_RSCKP, &ssi->srcr);
+ /*
+ * The DC and PM bits are only used if the SSI is the clock master.
+ */
+
+ /*
+ * Set the watermark for transmit FIFI 0 and receive FIFO 0. We don't
+ * use FIFO 1. We program the transmit water to signal a DMA transfer
+ * if there are only two (or fewer) elements left in the FIFO. Two
+ * elements equals one frame (left channel, right channel). This value,
+ * however, depends on the depth of the transmit buffer.
+ *
+ * We set the watermark on the same level as the DMA burstsize. For
+ * fiq it is probably better to use the biggest possible watermark
+ * size.
+ */
+ if (ssi_private->use_dma)
+ wm = ssi_private->fifo_depth - 2;
+ else
+ wm = ssi_private->fifo_depth;
+
+ write_ssi(CCSR_SSI_SFCSR_TFWM0(wm) | CCSR_SSI_SFCSR_RFWM0(wm) |
+ CCSR_SSI_SFCSR_TFWM1(wm) | CCSR_SSI_SFCSR_RFWM1(wm),
+ &ssi->sfcsr);
+
+ /*
+ * For ac97 interrupts are enabled with the startup of the substream
+ * because it is also running without an active substream. Normally SSI
+ * is only enabled when there is a substream.
+ */
+ if (ssi_private->imx_ac97) {
+ /*
+ * Setup the clock control register
+ */
+ write_ssi(CCSR_SSI_SxCCR_WL(17) | CCSR_SSI_SxCCR_DC(13),
+ &ssi->stccr);
+ write_ssi(CCSR_SSI_SxCCR_WL(17) | CCSR_SSI_SxCCR_DC(13),
+ &ssi->srccr);
+
+ /*
+ * Enable AC97 mode and startup the SSI
+ */
+ write_ssi(CCSR_SSI_SACNT_AC97EN | CCSR_SSI_SACNT_FV,
+ &ssi->sacnt);
+ write_ssi(0xff, &ssi->saccdis);
+ write_ssi(0x300, &ssi->saccen);
+
+ /*
+ * Enable SSI, Transmit and Receive
+ */
+ write_ssi_mask(&ssi->scr, 0, CCSR_SSI_SCR_SSIEN |
+ CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE);
+
+ write_ssi(CCSR_SSI_SOR_WAIT(3), &ssi->sor);
+ }
+
+ return 0;
+}
+
+
/**
* fsl_ssi_startup: create a new substream
*
@@ -319,70 +438,14 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream,
* and initialize the SSI registers.
*/
if (!ssi_private->first_stream) {
- struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
-
ssi_private->first_stream = substream;
/*
- * Section 16.5 of the MPC8610 reference manual says that the
- * SSI needs to be disabled before updating the registers we set
- * here.
- */
- write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_SSIEN, 0);
-
- /*
- * Program the SSI into I2S Slave Non-Network Synchronous mode.
- * Also enable the transmit and receive FIFO.
- *
- * FIXME: Little-endian samples require a different shift dir
- */
- 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));
-
- write_ssi(CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TFEN0 |
- CCSR_SSI_STCR_TFSI | CCSR_SSI_STCR_TEFS |
- CCSR_SSI_STCR_TSCKP, &ssi->stcr);
-
- write_ssi(CCSR_SSI_SRCR_RXBIT0 | CCSR_SSI_SRCR_RFEN0 |
- CCSR_SSI_SRCR_RFSI | CCSR_SSI_SRCR_REFS |
- CCSR_SSI_SRCR_RSCKP, &ssi->srcr);
-
- /*
- * The DC and PM bits are only used if the SSI is the clock
- * master.
- */
-
- /* Enable the interrupts and DMA requests */
- write_ssi(SIER_FLAGS, &ssi->sier);
-
- /*
- * Set the watermark for transmit FIFI 0 and receive FIFO 0. We
- * don't use FIFO 1. We program the transmit water to signal a
- * DMA transfer if there are only two (or fewer) elements left
- * in the FIFO. Two elements equals one frame (left channel,
- * right channel). This value, however, depends on the depth of
- * the transmit buffer.
- *
- * We program the receive FIFO to notify us if at least two
- * elements (one frame) have been written to the FIFO. We could
- * make this value larger (and maybe we should), but this way
- * data will be written to memory as soon as it's available.
- */
- 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
- * DMA controller will start. It's not supposed to start until
- * the SCR.TE (or SCR.RE) bit is set, but it does anyway. The
- * DMA controller will transfer one "BWC" of data (i.e. the
- * amount of data that the MR.BWC bits are set to). The reason
- * this is bad is because at this point, the PCM driver has not
- * finished initializing the DMA controller.
+ * fsl_ssi_setup was already called by ac97_init earlier if
+ * the driver is in ac97 mode.
*/
+ if (!ssi_private->imx_ac97)
+ fsl_ssi_setup(ssi_private);
} else {
if (synchronous) {
struct snd_pcm_runtime *first_runtime =
@@ -492,6 +555,27 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(rtd->cpu_dai);
struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
+ unsigned int sier_bits;
+
+ /*
+ * Enable only the interrupts and DMA requests
+ * that are needed for the channel. As the fiq
+ * is polling for this bits, we have to ensure
+ * that this are aligned with the preallocated
+ * buffers
+ */
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ if (ssi_private->use_dma)
+ sier_bits = SIER_FLAGS;
+ else
+ sier_bits = CCSR_SSI_SIER_TIE | CCSR_SSI_SIER_TFE0_EN;
+ } else {
+ if (ssi_private->use_dma)
+ sier_bits = SIER_FLAGS;
+ else
+ sier_bits = CCSR_SSI_SIER_RIE | CCSR_SSI_SIER_RFF0_EN;
+ }
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
@@ -510,12 +594,18 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_TE, 0);
else
write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_RE, 0);
+
+ if (!ssi_private->imx_ac97 && (read_ssi(&ssi->scr) &
+ (CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE)) == 0)
+ write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_SSIEN, 0);
break;
default:
return -EINVAL;
}
+ write_ssi(sier_bits, &ssi->sier);
+
return 0;
}
@@ -534,22 +624,13 @@ static void fsl_ssi_shutdown(struct snd_pcm_substream *substream,
ssi_private->first_stream = ssi_private->second_stream;
ssi_private->second_stream = NULL;
-
- /*
- * If this is the last active substream, disable the SSI.
- */
- if (!ssi_private->first_stream) {
- struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
-
- write_ssi_mask(&ssi->scr, CCSR_SSI_SCR_SSIEN, 0);
- }
}
static int fsl_ssi_dai_probe(struct snd_soc_dai *dai)
{
struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(dai);
- if (ssi_private->ssi_on_imx) {
+ if (ssi_private->ssi_on_imx && ssi_private->use_dma) {
dai->playback_dma_data = &ssi_private->dma_params_tx;
dai->capture_dma_data = &ssi_private->dma_params_rx;
}
@@ -587,6 +668,133 @@ static const struct snd_soc_component_driver fsl_ssi_component = {
.name = "fsl-ssi",
};
+/**
+ * fsl_ssi_ac97_trigger: start and stop the AC97 receive/transmit.
+ *
+ * This function is called by ALSA to start, stop, pause, and resume the
+ * transfer of data.
+ */
+static int fsl_ssi_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(
+ rtd->cpu_dai);
+ struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ write_ssi_mask(&ssi->sier, 0, CCSR_SSI_SIER_TIE |
+ CCSR_SSI_SIER_TFE0_EN);
+ else
+ write_ssi_mask(&ssi->sier, 0, CCSR_SSI_SIER_RIE |
+ CCSR_SSI_SIER_RFF0_EN);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ write_ssi_mask(&ssi->sier, CCSR_SSI_SIER_TIE |
+ CCSR_SSI_SIER_TFE0_EN, 0);
+ else
+ write_ssi_mask(&ssi->sier, CCSR_SSI_SIER_RIE |
+ CCSR_SSI_SIER_RFF0_EN, 0);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ write_ssi(CCSR_SSI_SOR_TX_CLR, &ssi->sor);
+ else
+ write_ssi(CCSR_SSI_SOR_RX_CLR, &ssi->sor);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops fsl_ssi_ac97_dai_ops = {
+ .startup = fsl_ssi_startup,
+ .shutdown = fsl_ssi_shutdown,
+ .trigger = fsl_ssi_ac97_trigger,
+};
+
+static struct snd_soc_dai_driver fsl_ssi_ac97_dai = {
+ .ac97_control = 1,
+ .playback = {
+ .stream_name = "AC97 Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .capture = {
+ .stream_name = "AC97 Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ },
+ .ops = &fsl_ssi_ac97_dai_ops,
+};
+
+
+static struct fsl_ssi_private *fsl_ac97_data;
+
+static void fsl_ssi_ac97_init(void)
+{
+ fsl_ssi_setup(fsl_ac97_data);
+}
+
+void fsl_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
+ unsigned short val)
+{
+ struct ccsr_ssi *ssi = fsl_ac97_data->ssi;
+ unsigned int lreg;
+ unsigned int lval;
+
+ if (reg > 0x7f)
+ return;
+
+
+ lreg = reg << 12;
+ write_ssi(lreg, &ssi->sacadd);
+
+ lval = val << 4;
+ write_ssi(lval , &ssi->sacdat);
+
+ write_ssi_mask(&ssi->sacnt, CCSR_SSI_SACNT_RDWR_MASK,
+ CCSR_SSI_SACNT_WR);
+ udelay(100);
+}
+
+unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97,
+ unsigned short reg)
+{
+ struct ccsr_ssi *ssi = fsl_ac97_data->ssi;
+
+ unsigned short val = -1;
+ unsigned int lreg;
+
+ lreg = (reg & 0x7f) << 12;
+ write_ssi(lreg, &ssi->sacadd);
+ write_ssi_mask(&ssi->sacnt, CCSR_SSI_SACNT_RDWR_MASK,
+ CCSR_SSI_SACNT_RD);
+
+ udelay(100);
+
+ val = (read_ssi(&ssi->sacdat) >> 4) & 0xffff;
+
+ return val;
+}
+
+static struct snd_ac97_bus_ops fsl_ssi_ac97_ops = {
+ .read = fsl_ssi_ac97_read,
+ .write = fsl_ssi_ac97_write,
+};
+
/* Show the statistics of a flag only if its interrupt is enabled. The
* compiler will optimze this code to a no-op if the interrupt is not
* enabled.
@@ -663,6 +871,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)
struct resource res;
char name[64];
bool shared;
+ bool ac97 = false;
/* SSIs that are not connected on the board should have a
* status = "disabled"
@@ -673,14 +882,20 @@ static int fsl_ssi_probe(struct platform_device *pdev)
/* We only support the SSI in "I2S Slave" mode */
sprop = of_get_property(np, "fsl,mode", NULL);
- if (!sprop || strcmp(sprop, "i2s-slave")) {
+ if (!sprop) {
+ dev_err(&pdev->dev, "fsl,mode property is necessary\n");
+ return -EINVAL;
+ }
+ if (!strcmp(sprop, "ac97-slave")) {
+ ac97 = true;
+ } else if (strcmp(sprop, "i2s-slave")) {
dev_notice(&pdev->dev, "mode %s is unsupported\n", sprop);
return -ENODEV;
}
/* The DAI name is the last part of the full name of the node. */
p = strrchr(np->full_name, '/') + 1;
- ssi_private = kzalloc(sizeof(struct fsl_ssi_private) + strlen(p),
+ ssi_private = devm_kzalloc(&pdev->dev, sizeof(*ssi_private) + strlen(p),
GFP_KERNEL);
if (!ssi_private) {
dev_err(&pdev->dev, "could not allocate DAI object\n");
@@ -689,38 +904,41 @@ static int fsl_ssi_probe(struct platform_device *pdev)
strcpy(ssi_private->name, p);
- /* Initialize this copy of the CPU DAI driver structure */
- memcpy(&ssi_private->cpu_dai_drv, &fsl_ssi_dai_template,
- sizeof(fsl_ssi_dai_template));
+ ssi_private->use_dma = !of_property_read_bool(np,
+ "fsl,fiq-stream-filter");
+
+ if (ac97) {
+ memcpy(&ssi_private->cpu_dai_drv, &fsl_ssi_ac97_dai,
+ sizeof(fsl_ssi_ac97_dai));
+
+ fsl_ac97_data = ssi_private;
+ ssi_private->imx_ac97 = true;
+
+ snd_soc_set_ac97_ops_of_reset(&fsl_ssi_ac97_ops, pdev);
+ } else {
+ /* Initialize this copy of the CPU DAI driver structure */
+ memcpy(&ssi_private->cpu_dai_drv, &fsl_ssi_dai_template,
+ sizeof(fsl_ssi_dai_template));
+ }
ssi_private->cpu_dai_drv.name = ssi_private->name;
/* Get the addresses and IRQ */
ret = of_address_to_resource(np, 0, &res);
if (ret) {
dev_err(&pdev->dev, "could not determine device resources\n");
- goto error_kmalloc;
+ return ret;
}
ssi_private->ssi = of_iomap(np, 0);
if (!ssi_private->ssi) {
dev_err(&pdev->dev, "could not map device resources\n");
- ret = -ENOMEM;
- goto error_kmalloc;
+ return -ENOMEM;
}
ssi_private->ssi_phys = res.start;
ssi_private->irq = irq_of_parse_and_map(np, 0);
if (ssi_private->irq == NO_IRQ) {
dev_err(&pdev->dev, "no irq for node %s\n", np->full_name);
- ret = -ENXIO;
- goto error_iomap;
- }
-
- /* The 'name' should not have any slashes in it. */
- ret = request_irq(ssi_private->irq, fsl_ssi_isr, 0, ssi_private->name,
- ssi_private);
- if (ret < 0) {
- dev_err(&pdev->dev, "could not claim irq %u\n", ssi_private->irq);
- goto error_irqmap;
+ return -ENXIO;
}
/* Are the RX and the TX clocks locked? */
@@ -739,13 +957,18 @@ static int fsl_ssi_probe(struct platform_device *pdev)
u32 dma_events[2];
ssi_private->ssi_on_imx = true;
- ssi_private->clk = clk_get(&pdev->dev, NULL);
+ ssi_private->clk = devm_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;
+ goto error_irqmap;
+ }
+ ret = clk_prepare_enable(ssi_private->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "clk_prepare_enable failed: %d\n",
+ ret);
+ goto error_irqmap;
}
- clk_prepare_enable(ssi_private->clk);
/*
* We have burstsize be "fifo_depth - 2" to match the SSI
@@ -763,24 +986,38 @@ static int fsl_ssi_probe(struct platform_device *pdev)
&ssi_private->filter_data_tx;
ssi_private->dma_params_rx.filter_data =
&ssi_private->filter_data_rx;
- /*
- * 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,
+ if (!of_property_read_bool(pdev->dev.of_node, "dmas") &&
+ ssi_private->use_dma) {
+ /*
+ * FIXME: This is a temporary solution until all
+ * necessary dma drivers support the generic dma
+ * bindings.
+ */
+ 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;
+ if (ret && ssi_private->use_dma) {
+ dev_err(&pdev->dev, "could not get dma events but fsl-ssi is configured to use DMA\n");
+ goto error_clk;
+ }
}
shared = of_device_is_compatible(of_get_parent(np),
"fsl,spba-bus");
imx_pcm_dma_params_init_data(&ssi_private->filter_data_tx,
- dma_events[0], shared);
+ dma_events[0], shared ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI);
imx_pcm_dma_params_init_data(&ssi_private->filter_data_rx,
- dma_events[1], shared);
+ dma_events[1], shared ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI);
+ } else if (ssi_private->use_dma) {
+ /* The 'name' should not have any slashes in it. */
+ ret = devm_request_irq(&pdev->dev, ssi_private->irq,
+ fsl_ssi_isr, 0, ssi_private->name,
+ ssi_private);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "could not claim irq %u\n",
+ ssi_private->irq);
+ goto error_irqmap;
+ }
}
/* Initialize the the device_attribute structure */
@@ -794,7 +1031,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)
if (ret) {
dev_err(&pdev->dev, "could not create sysfs %s file\n",
ssi_private->dev_attr.attr.name);
- goto error_irq;
+ goto error_clk;
}
/* Register with ASoC */
@@ -808,9 +1045,30 @@ static int fsl_ssi_probe(struct platform_device *pdev)
}
if (ssi_private->ssi_on_imx) {
- ret = imx_pcm_dma_init(pdev);
- if (ret)
- goto error_dev;
+ if (!ssi_private->use_dma) {
+
+ /*
+ * Some boards use an incompatible codec. To get it
+ * working, we are using imx-fiq-pcm-audio, that
+ * can handle those codecs. DMA is not possible in this
+ * situation.
+ */
+
+ ssi_private->fiq_params.irq = ssi_private->irq;
+ ssi_private->fiq_params.base = ssi_private->ssi;
+ ssi_private->fiq_params.dma_params_rx =
+ &ssi_private->dma_params_rx;
+ ssi_private->fiq_params.dma_params_tx =
+ &ssi_private->dma_params_tx;
+
+ ret = imx_pcm_fiq_init(pdev, &ssi_private->fiq_params);
+ if (ret)
+ goto error_dev;
+ } else {
+ ret = imx_pcm_dma_init(pdev);
+ if (ret)
+ goto error_dev;
+ }
}
/*
@@ -845,6 +1103,9 @@ static int fsl_ssi_probe(struct platform_device *pdev)
}
done:
+ if (ssi_private->imx_ac97)
+ fsl_ssi_ac97_init();
+
return 0;
error_dai:
@@ -857,23 +1118,12 @@ error_dev:
device_remove_file(&pdev->dev, dev_attr);
error_clk:
- if (ssi_private->ssi_on_imx) {
+ 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);
error_irqmap:
irq_dispose_mapping(ssi_private->irq);
-error_iomap:
- iounmap(ssi_private->ssi);
-
-error_kmalloc:
- kfree(ssi_private);
-
return ret;
}
@@ -883,20 +1133,15 @@ static int fsl_ssi_remove(struct platform_device *pdev)
if (!ssi_private->new_binding)
platform_device_unregister(ssi_private->pdev);
- if (ssi_private->ssi_on_imx) {
+ if (ssi_private->ssi_on_imx)
imx_pcm_dma_exit(pdev);
- clk_disable_unprepare(ssi_private->clk);
- clk_put(ssi_private->clk);
- }
snd_soc_unregister_component(&pdev->dev);
+ dev_set_drvdata(&pdev->dev, NULL);
device_remove_file(&pdev->dev, &ssi_private->dev_attr);
-
- free_irq(ssi_private->irq, ssi_private);
+ if (ssi_private->ssi_on_imx)
+ clk_disable_unprepare(ssi_private->clk);
irq_dispose_mapping(ssi_private->irq);
- kfree(ssi_private);
- dev_set_drvdata(&pdev->dev, NULL);
-
return 0;
}
@@ -919,6 +1164,7 @@ static struct platform_driver fsl_ssi_driver = {
module_platform_driver(fsl_ssi_driver);
+MODULE_ALIAS("platform:fsl-ssi-dai");
MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
MODULE_DESCRIPTION("Freescale Synchronous Serial Interface (SSI) ASoC Driver");
MODULE_LICENSE("GPL v2");