ASoC: Add PXA SSP support

The SSP ports PXA series processors can be used to implement a variety of
audio interface formats. This patch implements support for I2S, DSP A and
DSP B modes on these ports.

This patch is based on the previous out of tree pxa2xx-ssp driver (which
was originally written by Liam Girdwood with updates from Philipp Zabel
and Nicola Perrino) and pxa3xx-ssp driver (originally written by Seth
Forsee based on the pxa2xx-ssp driver). Testing coverage is not complete
currently.

Tested-by: Daniel Ribeiro <drwyrm@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/sound/soc/pxa/pxa-ssp.h b/sound/soc/pxa/pxa-ssp.h
new file mode 100644
index 000000000000..91deadd55675
--- /dev/null
+++ b/sound/soc/pxa/pxa-ssp.h
@@ -0,0 +1,47 @@
+/*
+ * ASoC PXA SSP port support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _PXA_SSP_H
+#define _PXA_SSP_H
+
+/* pxa DAI SSP IDs */
+#define PXA_DAI_SSP1                    0
+#define PXA_DAI_SSP2                    1
+#define PXA_DAI_SSP3                    2
+#define PXA_DAI_SSP4                    3
+
+/* SSP clock sources */
+#define PXA_SSP_CLK_PLL 0
+#define PXA_SSP_CLK_EXT 1
+#define PXA_SSP_CLK_NET 2
+#define PXA_SSP_CLK_AUDIO       3
+#define PXA_SSP_CLK_NET_PLL     4
+
+/* SSP audio dividers */
+#define PXA_SSP_AUDIO_DIV_ACDS          0
+#define PXA_SSP_AUDIO_DIV_SCDB          1
+#define PXA_SSP_DIV_SCR                         2
+
+/* SSP ACDS audio dividers values */
+#define PXA_SSP_CLK_AUDIO_DIV_1         0
+#define PXA_SSP_CLK_AUDIO_DIV_2         1
+#define PXA_SSP_CLK_AUDIO_DIV_4         2
+#define PXA_SSP_CLK_AUDIO_DIV_8         3
+#define PXA_SSP_CLK_AUDIO_DIV_16        4
+#define PXA_SSP_CLK_AUDIO_DIV_32        5
+
+/* SSP divider bypass */
+#define PXA_SSP_CLK_SCDB_4              0
+#define PXA_SSP_CLK_SCDB_1              1
+#define PXA_SSP_CLK_SCDB_8              2
+
+#define PXA_SSP_PLL_OUT  0
+
+extern struct snd_soc_dai pxa_ssp_dai[4];
+
+#endif