[alsa-devel] [PATCH v2 05/16] ASoC: fsl-ssi: Move imx-specific probe to seperate function
Markus Pargmann
mpa at pengutronix.de
Sat Mar 15 13:44:13 CET 2014
Move imx specific probe code to a seperate function. It reduces the
size of the probe() function and makes the code and error handling
easier to understand.
Signed-off-by: Markus Pargmann <mpa at pengutronix.de>
---
sound/soc/fsl/fsl_ssi.c | 185 +++++++++++++++++++++++++++---------------------
1 file changed, 103 insertions(+), 82 deletions(-)
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index f31bd15..b28f874 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -962,6 +962,100 @@ static void make_lowercase(char *s)
}
}
+static int fsl_ssi_imx_probe(struct platform_device *pdev,
+ struct fsl_ssi_private *ssi_private)
+{
+ struct device_node *np = pdev->dev.of_node;
+ u32 dma_events[2], dmas[4];
+ bool shared;
+ int ret;
+
+ 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);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(ssi_private->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "clk_prepare_enable failed: %d\n", ret);
+ return ret;
+ }
+
+ /* For those SLAVE implementations, we ingore non-baudclk cases
+ * and, instead, abandon MASTER mode that needs baud clock.
+ */
+ ssi_private->baudclk = devm_clk_get(&pdev->dev, "baud");
+ if (IS_ERR(ssi_private->baudclk))
+ dev_dbg(&pdev->dev, "could not get baud clock: %ld\n",
+ PTR_ERR(ssi_private->baudclk));
+ else
+ clk_prepare_enable(ssi_private->baudclk);
+
+ /*
+ * We have burstsize be "fifo_depth - 2" to match the SSI
+ * watermark setting in fsl_ssi_startup().
+ */
+ ssi_private->dma_params_tx.maxburst = ssi_private->fifo_depth - 2;
+ ssi_private->dma_params_rx.maxburst = ssi_private->fifo_depth - 2;
+ ssi_private->dma_params_tx.addr = ssi_private->ssi_phys +
+ offsetof(struct ccsr_ssi, stx0);
+ ssi_private->dma_params_rx.addr = ssi_private->ssi_phys +
+ offsetof(struct ccsr_ssi, srx0);
+ ssi_private->dma_params_tx.filter_data = &ssi_private->filter_data_tx;
+ ssi_private->dma_params_rx.filter_data = &ssi_private->filter_data_rx;
+
+ 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 && ssi_private->use_dma) {
+ dev_err(&pdev->dev, "could not get dma events but fsl-ssi is configured to use DMA\n");
+ goto error_dma_events;
+ }
+ }
+ /* Should this be merge with the above? */
+ if (!of_property_read_u32_array(pdev->dev.of_node, "dmas", dmas, 4)
+ && dmas[2] == IMX_DMATYPE_SSI_DUAL) {
+ ssi_private->use_dual_fifo = true;
+ /* When using dual fifo mode, we need to keep watermark
+ * as even numbers due to dma script limitation.
+ */
+ ssi_private->dma_params_tx.maxburst &= ~0x1;
+ ssi_private->dma_params_rx.maxburst &= ~0x1;
+ }
+
+ 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 ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI);
+ imx_pcm_dma_params_init_data(&ssi_private->filter_data_rx,
+ dma_events[1], shared ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI);
+
+ return 0;
+
+error_dma_events:
+ if (!IS_ERR(ssi_private->baudclk))
+ clk_disable_unprepare(ssi_private->baudclk);
+ clk_disable_unprepare(ssi_private->clk);
+
+ return ret;
+}
+
+static void fsl_ssi_imx_clean(struct platform_device *pdev,
+ struct fsl_ssi_private *ssi_private)
+{
+ if (!IS_ERR(ssi_private->baudclk))
+ clk_disable_unprepare(ssi_private->baudclk);
+ clk_disable_unprepare(ssi_private->clk);
+}
+
static int fsl_ssi_probe(struct platform_device *pdev)
{
struct fsl_ssi_private *ssi_private;
@@ -974,7 +1068,6 @@ static int fsl_ssi_probe(struct platform_device *pdev)
const uint32_t *iprop;
struct resource res;
char name[64];
- bool shared;
bool ac97 = false;
/* SSIs that are not connected on the board should have a
@@ -1088,80 +1181,11 @@ static int fsl_ssi_probe(struct platform_device *pdev)
if (hw_type == FSL_SSI_MX21 || hw_type == FSL_SSI_MX51 ||
hw_type == FSL_SSI_MX35) {
- u32 dma_events[2], dmas[4];
ssi_private->ssi_on_imx = true;
- 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);
+ ret = fsl_ssi_imx_probe(pdev, ssi_private);
+ if (ret)
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;
- }
-
- /* For those SLAVE implementations, we ingore non-baudclk cases
- * and, instead, abandon MASTER mode that needs baud clock.
- */
- ssi_private->baudclk = devm_clk_get(&pdev->dev, "baud");
- if (IS_ERR(ssi_private->baudclk))
- dev_dbg(&pdev->dev, "could not get baud clock: %ld\n",
- PTR_ERR(ssi_private->baudclk));
- else
- clk_prepare_enable(ssi_private->baudclk);
-
- /*
- * We have burstsize be "fifo_depth - 2" to match the SSI
- * watermark setting in fsl_ssi_startup().
- */
- ssi_private->dma_params_tx.maxburst =
- ssi_private->fifo_depth - 2;
- ssi_private->dma_params_rx.maxburst =
- ssi_private->fifo_depth - 2;
- ssi_private->dma_params_tx.addr =
- ssi_private->ssi_phys + offsetof(struct ccsr_ssi, stx0);
- ssi_private->dma_params_rx.addr =
- ssi_private->ssi_phys + offsetof(struct ccsr_ssi, srx0);
- ssi_private->dma_params_tx.filter_data =
- &ssi_private->filter_data_tx;
- ssi_private->dma_params_rx.filter_data =
- &ssi_private->filter_data_rx;
- 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 && 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;
- }
- }
- /* Should this be merge with the above? */
- if (!of_property_read_u32_array(pdev->dev.of_node, "dmas", dmas, 4)
- && dmas[2] == IMX_DMATYPE_SSI_DUAL) {
- ssi_private->use_dual_fifo = true;
- /* When using dual fifo mode, we need to keep watermark
- * as even numbers due to dma script limitation.
- */
- ssi_private->dma_params_tx.maxburst &= ~0x1;
- ssi_private->dma_params_rx.maxburst &= ~0x1;
- }
-
- 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 ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI);
- imx_pcm_dma_params_init_data(&ssi_private->filter_data_rx,
- dma_events[1], shared ? IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI);
}
/*
@@ -1176,7 +1200,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)
if (ret < 0) {
dev_err(&pdev->dev, "could not claim irq %u\n",
ssi_private->irq);
- goto error_clk;
+ goto error_irq;
}
}
@@ -1268,11 +1292,9 @@ error_dbgfs:
error_dev:
device_remove_file(&pdev->dev, dev_attr);
-error_clk:
+error_irq:
if (ssi_private->ssi_on_imx) {
- if (!IS_ERR(ssi_private->baudclk))
- clk_disable_unprepare(ssi_private->baudclk);
- clk_disable_unprepare(ssi_private->clk);
+ fsl_ssi_imx_clean(pdev, ssi_private);
}
error_irqmap:
@@ -1291,11 +1313,10 @@ static int fsl_ssi_remove(struct platform_device *pdev)
if (!ssi_private->new_binding)
platform_device_unregister(ssi_private->pdev);
snd_soc_unregister_component(&pdev->dev);
- if (ssi_private->ssi_on_imx) {
- if (!IS_ERR(ssi_private->baudclk))
- clk_disable_unprepare(ssi_private->baudclk);
- clk_disable_unprepare(ssi_private->clk);
- }
+
+ if (ssi_private->ssi_on_imx)
+ fsl_ssi_imx_clean(pdev, ssi_private);
+
if (ssi_private->irq_stats)
irq_dispose_mapping(ssi_private->irq);
--
1.9.0
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