ASoC: rockchip: add support for pdm controller

The Pulse Density Modulation Interface Controller (PDMC) is
a PDM interface controller and decoder that support PDM format.
It integrates a clock generator driving the PDM microphone
and embeds filters which decimate the incoming bit stream to
obtain most common audio rates.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 83 insertions, 0 deletions

diff --git a/sound/soc/rockchip/rockchip_pdm.h b/sound/soc/rockchip/rockchip_pdm.h
new file mode 100644
index 000000000000..886b48d128fd
--- /dev/null
+++ b/sound/soc/rockchip/rockchip_pdm.h
@@ -0,0 +1,83 @@
+/*
+ * Rockchip PDM ALSA SoC Digital Audio Interface(DAI)  driver
+ *
+ * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#ifndef _ROCKCHIP_PDM_H
+#define _ROCKCHIP_PDM_H
+
+/* PDM REGS */
+#define PDM_SYSCONFIG	(0x0000)
+#define PDM_CTRL0	(0x0004)
+#define PDM_CTRL1	(0x0008)
+#define PDM_CLK_CTRL	(0x000c)
+#define PDM_HPF_CTRL	(0x0010)
+#define PDM_FIFO_CTRL	(0x0014)
+#define PDM_DMA_CTRL	(0x0018)
+#define PDM_INT_EN	(0x001c)
+#define PDM_INT_CLR	(0x0020)
+#define PDM_INT_ST	(0x0024)
+#define PDM_RXFIFO_DATA	(0x0030)
+#define PDM_DATA_VALID	(0x0054)
+#define PDM_VERSION	(0x0058)
+
+/* PDM_SYSCONFIG */
+#define PDM_RX_MASK		(0x1 << 2)
+#define PDM_RX_START		(0x1 << 2)
+#define PDM_RX_STOP		(0x0 << 2)
+#define PDM_RX_CLR_MASK		(0x1 << 0)
+#define PDM_RX_CLR_WR		(0x1 << 0)
+#define PDM_RX_CLR_DONE		(0x0 << 0)
+
+/* PDM CTRL0 */
+#define PDM_PATH_MSK		(0xf << 27)
+#define PDM_PATH3_EN		BIT(30)
+#define PDM_PATH2_EN		BIT(29)
+#define PDM_PATH1_EN		BIT(28)
+#define PDM_PATH0_EN		BIT(27)
+#define PDM_HWT_EN		BIT(26)
+#define PDM_VDW_MSK		(0x1f << 0)
+#define PDM_VDW(X)		((X - 1) << 0)
+
+/* PDM CLK CTRL */
+#define PDM_CLK_MSK		BIT(5)
+#define PDM_CLK_EN		BIT(5)
+#define PDM_CLK_DIS		(0x0 << 5)
+#define PDM_CKP_MSK		BIT(3)
+#define PDM_CKP_NORMAL		(0x0 << 3)
+#define PDM_CKP_INVERTED	BIT(3)
+#define PDM_DS_RATIO_MSK	(0x7 << 0)
+#define PDM_CLK_320FS		(0x0 << 0)
+#define PDM_CLK_640FS		(0x1 << 0)
+#define PDM_CLK_1280FS		(0x2 << 0)
+#define PDM_CLK_2560FS		(0x3 << 0)
+#define PDM_CLK_5120FS		(0x4 << 0)
+
+/* PDM HPF CTRL */
+#define PDM_HPF_LE		BIT(3)
+#define PDM_HPF_RE		BIT(2)
+#define PDM_HPF_CF_MSK		(0x3 << 0)
+#define PDM_HPF_3P79HZ		(0x0 << 0)
+#define PDM_HPF_60HZ		(0x1 << 0)
+#define PDM_HPF_243HZ		(0x2 << 0)
+#define PDM_HPF_493HZ		(0x3 << 0)
+
+/* PDM DMA CTRL */
+#define PDM_DMA_RD_MSK		BIT(8)
+#define PDM_DMA_RD_EN		BIT(8)
+#define PDM_DMA_RD_DIS		(0x0 << 8)
+#define PDM_DMA_RDL_MSK		(0x7f << 0)
+#define PDM_DMA_RDL(X)		((X - 1) << 0)
+
+#endif /* _ROCKCHIP_PDM_H */