ASoC: tegra: Add tegra-i2s driver

This provides an ASoC DAI interface for Tegra's I2S controller.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 165 insertions, 0 deletions

diff --git a/sound/soc/tegra/tegra_i2s.h b/sound/soc/tegra/tegra_i2s.h
new file mode 100644
index 00000000000..2b38a096f46
--- /dev/null
+++ b/sound/soc/tegra/tegra_i2s.h
@@ -0,0 +1,165 @@
+/*
+ * tegra_i2s.h - Definitions for Tegra I2S driver
+ *
+ * Author: Stephen Warren <swarren@nvidia.com>
+ * Copyright (C) 2010 - NVIDIA, Inc.
+ *
+ * Based on code copyright/by:
+ *
+ * Copyright (c) 2009-2010, NVIDIA Corporation.
+ * Scott Peterson <speterson@nvidia.com>
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Iliyan Malchev <malchev@google.com>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#ifndef __TEGRA_I2S_H__
+#define __TEGRA_I2S_H__
+
+#include "tegra_pcm.h"
+
+/* Register offsets from TEGRA_I2S1_BASE and TEGRA_I2S2_BASE */
+
+#define TEGRA_I2S_CTRL					0x00
+#define TEGRA_I2S_STATUS				0x04
+#define TEGRA_I2S_TIMING				0x08
+#define TEGRA_I2S_FIFO_SCR				0x0c
+#define TEGRA_I2S_PCM_CTRL				0x10
+#define TEGRA_I2S_NW_CTRL				0x14
+#define TEGRA_I2S_TDM_CTRL				0x20
+#define TEGRA_I2S_TDM_TX_RX_CTRL			0x24
+#define TEGRA_I2S_FIFO1					0x40
+#define TEGRA_I2S_FIFO2					0x80
+
+/* Fields in TEGRA_I2S_CTRL */
+
+#define TEGRA_I2S_CTRL_FIFO2_TX_ENABLE			(1 << 30)
+#define TEGRA_I2S_CTRL_FIFO1_ENABLE			(1 << 29)
+#define TEGRA_I2S_CTRL_FIFO2_ENABLE			(1 << 28)
+#define TEGRA_I2S_CTRL_FIFO1_RX_ENABLE			(1 << 27)
+#define TEGRA_I2S_CTRL_FIFO_LPBK_ENABLE			(1 << 26)
+#define TEGRA_I2S_CTRL_MASTER_ENABLE			(1 << 25)
+
+#define TEGRA_I2S_LRCK_LEFT_LOW				0
+#define TEGRA_I2S_LRCK_RIGHT_LOW			1
+
+#define TEGRA_I2S_CTRL_LRCK_SHIFT			24
+#define TEGRA_I2S_CTRL_LRCK_MASK			(1                        << TEGRA_I2S_CTRL_LRCK_SHIFT)
+#define TEGRA_I2S_CTRL_LRCK_L_LOW			(TEGRA_I2S_LRCK_LEFT_LOW  << TEGRA_I2S_CTRL_LRCK_SHIFT)
+#define TEGRA_I2S_CTRL_LRCK_R_LOW			(TEGRA_I2S_LRCK_RIGHT_LOW << TEGRA_I2S_CTRL_LRCK_SHIFT)
+
+#define TEGRA_I2S_BIT_FORMAT_I2S			0
+#define TEGRA_I2S_BIT_FORMAT_RJM			1
+#define TEGRA_I2S_BIT_FORMAT_LJM			2
+#define TEGRA_I2S_BIT_FORMAT_DSP			3
+
+#define TEGRA_I2S_CTRL_BIT_FORMAT_SHIFT			10
+#define TEGRA_I2S_CTRL_BIT_FORMAT_MASK			(3                        << TEGRA_I2S_CTRL_BIT_FORMAT_SHIFT)
+#define TEGRA_I2S_CTRL_BIT_FORMAT_I2S			(TEGRA_I2S_BIT_FORMAT_I2S << TEGRA_I2S_CTRL_BIT_FORMAT_SHIFT)
+#define TEGRA_I2S_CTRL_BIT_FORMAT_RJM			(TEGRA_I2S_BIT_FORMAT_RJM << TEGRA_I2S_CTRL_BIT_FORMAT_SHIFT)
+#define TEGRA_I2S_CTRL_BIT_FORMAT_LJM			(TEGRA_I2S_BIT_FORMAT_LJM << TEGRA_I2S_CTRL_BIT_FORMAT_SHIFT)
+#define TEGRA_I2S_CTRL_BIT_FORMAT_DSP			(TEGRA_I2S_BIT_FORMAT_DSP << TEGRA_I2S_CTRL_BIT_FORMAT_SHIFT)
+
+#define TEGRA_I2S_BIT_SIZE_16				0
+#define TEGRA_I2S_BIT_SIZE_20				1
+#define TEGRA_I2S_BIT_SIZE_24				2
+#define TEGRA_I2S_BIT_SIZE_32				3
+
+#define TEGRA_I2S_CTRL_BIT_SIZE_SHIFT			8
+#define TEGRA_I2S_CTRL_BIT_SIZE_MASK			(3                     << TEGRA_I2S_CTRL_BIT_SIZE_SHIFT)
+#define TEGRA_I2S_CTRL_BIT_SIZE_16			(TEGRA_I2S_BIT_SIZE_16 << TEGRA_I2S_CTRL_BIT_SIZE_SHIFT)
+#define TEGRA_I2S_CTRL_BIT_SIZE_20			(TEGRA_I2S_BIT_SIZE_20 << TEGRA_I2S_CTRL_BIT_SIZE_SHIFT)
+#define TEGRA_I2S_CTRL_BIT_SIZE_24			(TEGRA_I2S_BIT_SIZE_24 << TEGRA_I2S_CTRL_BIT_SIZE_SHIFT)
+#define TEGRA_I2S_CTRL_BIT_SIZE_32			(TEGRA_I2S_BIT_SIZE_32 << TEGRA_I2S_CTRL_BIT_SIZE_SHIFT)
+
+#define TEGRA_I2S_FIFO_16_LSB				0
+#define TEGRA_I2S_FIFO_20_LSB				1
+#define TEGRA_I2S_FIFO_24_LSB				2
+#define TEGRA_I2S_FIFO_32				3
+#define TEGRA_I2S_FIFO_PACKED				7
+
+#define TEGRA_I2S_CTRL_FIFO_FORMAT_SHIFT		4
+#define TEGRA_I2S_CTRL_FIFO_FORMAT_MASK			(7                     << TEGRA_I2S_CTRL_FIFO_FORMAT_SHIFT)
+#define TEGRA_I2S_CTRL_FIFO_FORMAT_16_LSB		(TEGRA_I2S_FIFO_16_LSB << TEGRA_I2S_CTRL_FIFO_FORMAT_SHIFT)
+#define TEGRA_I2S_CTRL_FIFO_FORMAT_20_LSB		(TEGRA_I2S_FIFO_20_LSB << TEGRA_I2S_CTRL_FIFO_FORMAT_SHIFT)
+#define TEGRA_I2S_CTRL_FIFO_FORMAT_24_LSB		(TEGRA_I2S_FIFO_24_LSB << TEGRA_I2S_CTRL_FIFO_FORMAT_SHIFT)
+#define TEGRA_I2S_CTRL_FIFO_FORMAT_32			(TEGRA_I2S_FIFO_32     << TEGRA_I2S_CTRL_FIFO_FORMAT_SHIFT)
+#define TEGRA_I2S_CTRL_FIFO_FORMAT_PACKED		(TEGRA_I2S_FIFO_PACKED << TEGRA_I2S_CTRL_FIFO_FORMAT_SHIFT)
+
+#define TEGRA_I2S_CTRL_IE_FIFO1_ERR			(1 << 3)
+#define TEGRA_I2S_CTRL_IE_FIFO2_ERR			(1 << 2)
+#define TEGRA_I2S_CTRL_QE_FIFO1				(1 << 1)
+#define TEGRA_I2S_CTRL_QE_FIFO2				(1 << 0)
+
+/* Fields in TEGRA_I2S_STATUS */
+
+#define TEGRA_I2S_STATUS_FIFO1_RDY			(1 << 31)
+#define TEGRA_I2S_STATUS_FIFO2_RDY			(1 << 30)
+#define TEGRA_I2S_STATUS_FIFO1_BSY			(1 << 29)
+#define TEGRA_I2S_STATUS_FIFO2_BSY			(1 << 28)
+#define TEGRA_I2S_STATUS_FIFO1_ERR			(1 << 3)
+#define TEGRA_I2S_STATUS_FIFO2_ERR			(1 << 2)
+#define TEGRA_I2S_STATUS_QS_FIFO1			(1 << 1)
+#define TEGRA_I2S_STATUS_QS_FIFO2			(1 << 0)
+
+/* Fields in TEGRA_I2S_TIMING */
+
+#define TEGRA_I2S_TIMING_NON_SYM_ENABLE			(1 << 12)
+#define TEGRA_I2S_TIMING_CHANNEL_BIT_COUNT_SHIFT	0
+#define TEGRA_I2S_TIMING_CHANNEL_BIT_COUNT_MASK_US	0x7fff
+#define TEGRA_I2S_TIMING_CHANNEL_BIT_COUNT_MASK		(TEGRA_I2S_TIMING_CHANNEL_BIT_COUNT_MASK_US << TEGRA_I2S_TIMING_CHANNEL_BIT_COUNT_SHIFT)
+
+/* Fields in TEGRA_I2S_FIFO_SCR */
+
+#define TEGRA_I2S_FIFO_SCR_FIFO2_FULL_EMPTY_COUNT_SHIFT	24
+#define TEGRA_I2S_FIFO_SCR_FIFO1_FULL_EMPTY_COUNT_SHIFT	16
+#define TEGRA_I2S_FIFO_SCR_FIFO_FULL_EMPTY_COUNT_MASK	0x3f
+
+#define TEGRA_I2S_FIFO_SCR_FIFO2_CLR			(1 << 12)
+#define TEGRA_I2S_FIFO_SCR_FIFO1_CLR			(1 << 8)
+
+#define TEGRA_I2S_FIFO_ATN_LVL_ONE_SLOT			0
+#define TEGRA_I2S_FIFO_ATN_LVL_FOUR_SLOTS		1
+#define TEGRA_I2S_FIFO_ATN_LVL_EIGHT_SLOTS		2
+#define TEGRA_I2S_FIFO_ATN_LVL_TWELVE_SLOTS		3
+
+#define TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_SHIFT		4
+#define TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_MASK		(3 << TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_SHIFT)
+#define TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_ONE_SLOT	(TEGRA_I2S_FIFO_ATN_LVL_ONE_SLOT     << TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_SHIFT)
+#define TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_FOUR_SLOTS	(TEGRA_I2S_FIFO_ATN_LVL_FOUR_SLOTS   << TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_SHIFT)
+#define TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_EIGHT_SLOTS	(TEGRA_I2S_FIFO_ATN_LVL_EIGHT_SLOTS  << TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_SHIFT)
+#define TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_TWELVE_SLOTS	(TEGRA_I2S_FIFO_ATN_LVL_TWELVE_SLOTS << TEGRA_I2S_FIFO_SCR_FIFO2_ATN_LVL_SHIFT)
+
+#define TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_SHIFT		0
+#define TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_MASK		(3 << TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_SHIFT)
+#define TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_ONE_SLOT	(TEGRA_I2S_FIFO_ATN_LVL_ONE_SLOT     << TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_SHIFT)
+#define TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_FOUR_SLOTS	(TEGRA_I2S_FIFO_ATN_LVL_FOUR_SLOTS   << TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_SHIFT)
+#define TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_EIGHT_SLOTS	(TEGRA_I2S_FIFO_ATN_LVL_EIGHT_SLOTS  << TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_SHIFT)
+#define TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_TWELVE_SLOTS	(TEGRA_I2S_FIFO_ATN_LVL_TWELVE_SLOTS << TEGRA_I2S_FIFO_SCR_FIFO1_ATN_LVL_SHIFT)
+
+struct tegra_i2s {
+	struct clk *clk_i2s;
+	int clk_refs;
+	struct tegra_pcm_dma_params capture_dma_data;
+	struct tegra_pcm_dma_params playback_dma_data;
+	void __iomem *regs;
+	struct dentry *debug;
+	u32 reg_ctrl;
+};
+
+#endif