On the Freescale MPC8610, SSI1 is hard-coded to use DMA channels 0 and 1 for playback and capture, and SSI2 is hard-coded to use DMA channels 2 and 3. This patch fixes the fabric driver so that it uses the right channels.

Signed-off-by: Timur Tabi timur@freescale.com --- sound/soc/fsl/mpc8610_hpcd.c | 26 +++++++++++++++----------- 1 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/sound/soc/fsl/mpc8610_hpcd.c b/sound/soc/fsl/mpc8610_hpcd.c index 4bdc9d8..94f89de 100644 --- a/sound/soc/fsl/mpc8610_hpcd.c +++ b/sound/soc/fsl/mpc8610_hpcd.c @@ -68,10 +68,6 @@ static int mpc8610_hpcd_machine_probe(struct platform_device *sound_device) guts_set_pmuxcr_dma(machine_data->guts, machine_data->dma_id, machine_data->dma_channel_id[1], 0);

- guts_set_pmuxcr_dma(machine_data->guts, 1, 0, 0); - guts_set_pmuxcr_dma(machine_data->guts, 1, 3, 0); - guts_set_pmuxcr_dma(machine_data->guts, 0, 3, 0); - switch (machine_data->ssi_id) { case 0: clrsetbits_be32(&machine_data->guts->pmuxcr, @@ -230,6 +226,8 @@ static int mpc8610_hpcd_probe(struct of_device *ofdev, struct fsl_ssi_info ssi_info; struct fsl_dma_info dma_info; int ret = -ENODEV; + unsigned int playback_dma_channel; + unsigned int capture_dma_channel;

machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL); if (!machine_data) @@ -381,8 +379,9 @@ static int mpc8610_hpcd_probe(struct of_device *ofdev, goto error; }

- /* Find the DMA channels to use. For now, we always use the first DMA - controller. */ + /* Find the DMA channels to use. Both SSIs need to use the same DMA + * controller, so let's use DMA#1. + */ for_each_compatible_node(dma_np, NULL, "fsl,mpc8610-dma") { iprop = of_get_property(dma_np, "cell-index", NULL); if (iprop && (*iprop == 0)) { @@ -397,14 +396,19 @@ static int mpc8610_hpcd_probe(struct of_device *ofdev, } machine_data->dma_id = *iprop;

+ /* SSI1 needs to use DMA Channels 0 and 1, and SSI2 needs to use DMA + * channels 2 and 3. This is just how the MPC8610 is wired + * internally. + */ + playback_dma_channel = (machine_data->ssi_id == 0) ? 0 : 2; + capture_dma_channel = (machine_data->ssi_id == 0) ? 1 : 3; + /* - * Find the DMA channels to use. For now, we always use DMA channel 0 - * for playback, and DMA channel 1 for capture. + * Find the DMA channels to use. */ while ((dma_channel_np = of_get_next_child(dma_np, dma_channel_np))) { iprop = of_get_property(dma_channel_np, "cell-index", NULL); - /* Is it DMA channel 0? */ - if (iprop && (*iprop == 0)) { + if (iprop && (*iprop == playback_dma_channel)) { /* dma_channel[0] and dma_irq[0] are for playback */ dma_info.dma_channel[0] = of_iomap(dma_channel_np, 0); dma_info.dma_irq[0] = @@ -412,7 +416,7 @@ static int mpc8610_hpcd_probe(struct of_device *ofdev, machine_data->dma_channel_id[0] = *iprop; continue; } - if (iprop && (*iprop == 1)) { + if (iprop && (*iprop == capture_dma_channel)) { /* dma_channel[1] and dma_irq[1] are for capture */ dma_info.dma_channel[1] = of_iomap(dma_channel_np, 0); dma_info.dma_irq[1] =