[alsa-devel] [PATCH 2/2] ASoC: add driver for Rockchip RK3xxx I2S controller
jianqun
xjq at rock-chips.com
Tue Jul 1 10:47:38 CEST 2014
From: Jianqun Xu <xjq at rock-chips.com>
Add driver for I2S controller in Rockchip RK3xxx SoCs.
This driver patch has been tested on the RK3288 SDK board.
Signed-off-by: Jianqun Xu <xjq at rock-chips.com>
---
sound/soc/Kconfig | 1 +
sound/soc/Makefile | 1 +
sound/soc/rockchip/Kconfig | 16 +
sound/soc/rockchip/Makefile | 6 +
sound/soc/rockchip/i2s.h | 222 +++++++++++++
sound/soc/rockchip/pcm.h | 14 +
sound/soc/rockchip/rockchip_i2s.c | 622 +++++++++++++++++++++++++++++++++++++
sound/soc/rockchip/rockchip_pcm.c | 64 ++++
8 files changed, 946 insertions(+)
create mode 100644 sound/soc/rockchip/Kconfig
create mode 100644 sound/soc/rockchip/Makefile
create mode 100644 sound/soc/rockchip/i2s.h
create mode 100644 sound/soc/rockchip/pcm.h
create mode 100644 sound/soc/rockchip/rockchip_i2s.c
create mode 100644 sound/soc/rockchip/rockchip_pcm.c
diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index 0060b31..0e96233 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -47,6 +47,7 @@ source "sound/soc/kirkwood/Kconfig"
source "sound/soc/intel/Kconfig"
source "sound/soc/mxs/Kconfig"
source "sound/soc/pxa/Kconfig"
+source "sound/soc/rockchip/Kconfig"
source "sound/soc/samsung/Kconfig"
source "sound/soc/s6000/Kconfig"
source "sound/soc/sh/Kconfig"
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index 5f1df02..534714a 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_SND_SOC) += nuc900/
obj-$(CONFIG_SND_SOC) += omap/
obj-$(CONFIG_SND_SOC) += kirkwood/
obj-$(CONFIG_SND_SOC) += pxa/
+obj-$(CONFIG_SND_SOC) += rockchip/
obj-$(CONFIG_SND_SOC) += samsung/
obj-$(CONFIG_SND_SOC) += s6000/
obj-$(CONFIG_SND_SOC) += sh/
diff --git a/sound/soc/rockchip/Kconfig b/sound/soc/rockchip/Kconfig
new file mode 100644
index 0000000..946b60c
--- /dev/null
+++ b/sound/soc/rockchip/Kconfig
@@ -0,0 +1,16 @@
+config SND_SOC_ROCKCHIP
+ tristate "ASoC support for Rockchip"
+ depends on SND_SOC && ARCH_ROCKCHIP
+ select SND_SOC_GENERIC_DMAENGINE_PCM
+ select SND_ROCKCHIP_PCM
+ select SND_ROCKCHIP_I2S
+ help
+ Say Y or M if you want to add support for codecs attached to
+ the Rockchip SoCs' Audio interfaces. You will also need to
+ select the audio interfaces to support below.
+
+config SND_ROCKCHIP_I2S
+ tristate
+
+config SND_ROCKCHIP_PCM
+ tristate
diff --git a/sound/soc/rockchip/Makefile b/sound/soc/rockchip/Makefile
new file mode 100644
index 0000000..0b5d47e
--- /dev/null
+++ b/sound/soc/rockchip/Makefile
@@ -0,0 +1,6 @@
+# ROCKCHIP Platform Support
+snd-soc-i2s-objs := rockchip_i2s.o
+snd-soc-pcm-objs := rockchip_pcm.o
+
+obj-$(CONFIG_SND_ROCKCHIP_I2S) += snd-soc-i2s.o
+obj-$(CONFIG_SND_ROCKCHIP_PCM) += snd-soc-pcm.o
diff --git a/sound/soc/rockchip/i2s.h b/sound/soc/rockchip/i2s.h
new file mode 100644
index 0000000..54a5a67
--- /dev/null
+++ b/sound/soc/rockchip/i2s.h
@@ -0,0 +1,222 @@
+/*
+ * i2s.h - ALSA IIS interface for the rockchip SoC
+ *
+ * Driver for rockchip iis audio
+ *
+ * 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.
+ */
+
+#include <linux/version.h>
+
+#ifndef _ROCKCHIP_IIS_H
+#define _ROCKCHIP_IIS_H
+
+/*
+ * TXCR
+ * transmit operation control register
+*/
+#define I2S_TXCR_RCNT_SHIFT 17
+#define I2S_TXCR_RCNT_MASK (0x3f << I2S_TXCR_RCNT_SHIFT)
+#define I2S_TXCR_CSR_SHIFT 15
+#define I2S_TXCR_CSR(x) (x << I2S_TXCR_CSR_SHIFT)
+#define I2S_TXCR_CSR_MASK (3 << I2S_TXCR_CSR_SHIFT)
+#define I2S_TXCR_HWT BIT(14)
+#define I2S_TXCR_SJM_SHIFT 12
+#define I2S_TXCR_SJM_R (0 << I2S_TXCR_SJM_SHIFT)
+#define I2S_TXCR_SJM_L (1 << I2S_TXCR_SJM_SHIFT)
+#define I2S_TXCR_FBM_SHIFT 11
+#define I2S_TXCR_FBM_MSB (0 << I2S_TXCR_FBM_SHIFT)
+#define I2S_TXCR_FBM_LSB (1 << I2S_TXCR_FBM_SHIFT)
+#define I2S_TXCR_IBM_SHIFT 9
+#define I2S_TXCR_IBM_NORMAL (0 << I2S_TXCR_IBM_SHIFT)
+#define I2S_TXCR_IBM_LSJM (1 << I2S_TXCR_IBM_SHIFT)
+#define I2S_TXCR_IBM_RSJM (2 << I2S_TXCR_IBM_SHIFT)
+#define I2S_TXCR_IBM_MASK (3 << I2S_TXCR_IBM_SHIFT)
+#define I2S_TXCR_PBM_SHIFT 7
+#define I2S_TXCR_PBM_MODE(x) (x << I2S_TXCR_PBM_SHIFT)
+#define I2S_TXCR_PBM_MASK (3 << I2S_TXCR_PBM_SHIFT)
+#define I2S_TXCR_TFS_SHIFT 5
+#define I2S_TXCR_TFS_I2S (0 << I2S_TXCR_TFS_SHIFT)
+#define I2S_TXCR_TFS_PCM (1 << I2S_TXCR_TFS_SHIFT)
+#define I2S_TXCR_VDW_SHIFT 0
+#define I2S_TXCR_VDW(x) ((x - 1) << I2S_TXCR_VDW_SHIFT)
+#define I2S_TXCR_VDW_MASK (0x1f << I2S_TXCR_VDW_SHIFT)
+
+/*
+ * RXCR
+ * receive operation control register
+*/
+#define I2S_RXCR_HWT BIT(14)
+#define I2S_RXCR_SJM_SHIFT 12
+#define I2S_RXCR_SJM_R (0 << I2S_RXCR_SJM_SHIFT)
+#define I2S_RXCR_SJM_L (1 << I2S_RXCR_SJM_SHIFT)
+#define I2S_RXCR_FBM_SHIFT 11
+#define I2S_RXCR_FBM_MSB (0 << I2S_RXCR_FBM_SHIFT)
+#define I2S_RXCR_FBM_LSB (1 << I2S_RXCR_FBM_SHIFT)
+#define I2S_RXCR_IBM_SHIFT 9
+#define I2S_RXCR_IBM_NORMAL (0 << I2S_RXCR_IBM_SHIFT)
+#define I2S_RXCR_IBM_LSJM (1 << I2S_RXCR_IBM_SHIFT)
+#define I2S_RXCR_IBM_RSJM (2 << I2S_RXCR_IBM_SHIFT)
+#define I2S_RXCR_IBM_MASK (3 << I2S_RXCR_IBM_SHIFT)
+#define I2S_RXCR_PBM_SHIFT 7
+#define I2S_RXCR_PBM_MODE(x) (x << I2S_RXCR_PBM_SHIFT)
+#define I2S_RXCR_PBM_MASK (3 << I2S_RXCR_PBM_SHIFT)
+#define I2S_RXCR_TFS_SHIFT 5
+#define I2S_RXCR_TFS_I2S (0 << I2S_RXCR_TFS_SHIFT)
+#define I2S_RXCR_TFS_PCM (1 << I2S_RXCR_TFS_SHIFT)
+#define I2S_RXCR_VDW_SHIFT 0
+#define I2S_RXCR_VDW(x) ((x - 1) << I2S_RXCR_VDW_SHIFT)
+#define I2S_RXCR_VDW_MASK (0x1f << I2S_RXCR_VDW_SHIFT)
+
+/*
+ * CKR
+ * clock generation register
+*/
+#define I2S_CKR_MSS_SHIFT 27
+#define I2S_CKR_MSS_MASTER (0 << I2S_CKR_MSS_SHIFT)
+#define I2S_CKR_MSS_SLAVE (1 << I2S_CKR_MSS_SHIFT)
+#define I2S_CKR_MSS_MASK (1 << I2S_CKR_MSS_SHIFT)
+#define I2S_CKR_CKP_SHIFT 26
+#define I2S_CKR_CKP_NEG (0 << I2S_CKR_CKP_SHIFT)
+#define I2S_CKR_CKP_POS (1 << I2S_CKR_CKP_SHIFT)
+#define I2S_CKR_RLP_SHIFT 25
+#define I2S_CKR_RLP_NORMAL (0 << I2S_CKR_RLP_SHIFT)
+#define I2S_CKR_RLP_OPPSITE (1 << I2S_CKR_RLP_SHIFT)
+#define I2S_CKR_TLP_SHIFT 24
+#define I2S_CKR_TLP_NORMAL (0 << I2S_CKR_TLP_SHIFT)
+#define I2S_CKR_TLP_OPPSITE (1 << I2S_CKR_TLP_SHIFT)
+#define I2S_CKR_MDIV_SHIFT 16
+#define I2S_CKR_MDIV(x) ((x - 1) << I2S_CKR_MDIV_SHIFT)
+#define I2S_CKR_MDIV_MASK (0xff << I2S_CKR_MDIV_SHIFT)
+#define I2S_CKR_RSD_SHIFT 8
+#define I2S_CKR_RSD(x) ((x - 1) << I2S_CKR_RSD_SHIFT)
+#define I2S_CKR_RSD_MASK (0xff << I2S_CKR_RSD_SHIFT)
+#define I2S_CKR_TSD_SHIFT 0
+#define I2S_CKR_TSD(x) ((x - 1) << I2S_CKR_TSD_SHIFT)
+#define I2S_CKR_TSD_MASK (0xff << I2S_CKR_TSD_SHIFT)
+
+/*
+ * FIFOLR
+ * FIFO level register
+*/
+#define I2S_FIFOLR_RFL_SHIFT 24
+#define I2S_FIFOLR_RFL_MASK (0x3f << I2S_FIFOLR_RFL_SHIFT)
+#define I2S_FIFOLR_TFL3_SHIFT 18
+#define I2S_FIFOLR_TFL3_MASK (0x3f << I2S_FIFOLR_TFL3_SHIFT)
+#define I2S_FIFOLR_TFL2_SHIFT 12
+#define I2S_FIFOLR_TFL2_MASK (0x3f << I2S_FIFOLR_TFL2_SHIFT)
+#define I2S_FIFOLR_TFL1_SHIFT 6
+#define I2S_FIFOLR_TFL1_MASK (0x3f << I2S_FIFOLR_TFL1_SHIFT)
+#define I2S_FIFOLR_TFL0_SHIFT 0
+#define I2S_FIFOLR_TFL0_MASK (0x3f << I2S_FIFOLR_TFL0_SHIFT)
+
+/*
+ * DMACR
+ * DMA control register
+*/
+#define I2S_DMACR_RDE_SHIFT 24
+#define I2S_DMACR_RDE_DISABLE (0 << I2S_DMACR_RDE_SHIFT)
+#define I2S_DMACR_RDE_ENABLE (1 << I2S_DMACR_RDE_SHIFT)
+#define I2S_DMACR_RDL_SHIFT 16
+#define I2S_DMACR_RDL(x) ((x - 1) << I2S_DMACR_RDL_SHIFT)
+#define I2S_DMACR_RDL_MASK (0x1f << I2S_DMACR_RDL_SHIFT)
+#define I2S_DMACR_TDE_SHIFT 8
+#define I2S_DMACR_TDE_DISABLE (0 << I2S_DMACR_TDE_SHIFT)
+#define I2S_DMACR_TDE_ENABLE (1 << I2S_DMACR_TDE_SHIFT)
+#define I2S_DMACR_TDL_SHIFT 0
+#define I2S_DMACR_TDL(x) ((x - 1) << I2S_DMACR_TDL_SHIFT)
+#define I2S_DMACR_TDL_MASK (0x1f << I2S_DMACR_TDL_SHIFT)
+
+/*
+ * INTCR
+ * interrupt control register
+*/
+#define I2S_INTCR_RFT_SHIFT 20
+#define I2S_INTCR_RFT(x) ((x - 1) << I2S_INTCR_RFT_SHIFT)
+#define I2S_INTCR_RXOIC BIT(18)
+#define I2S_INTCR_RXOIE_SHIFT 17
+#define I2S_INTCR_RXOIE_DISABLE (0 << I2S_INTCR_RXOIE_SHIFT)
+#define I2S_INTCR_RXOIE_ENABLE (1 << I2S_INTCR_RXOIE_SHIFT)
+#define I2S_INTCR_RXFIE_SHIFT 16
+#define I2S_INTCR_RXFIE_DISABLE (0 << I2S_INTCR_RXFIE_SHIFT)
+#define I2S_INTCR_RXFIE_ENABLE (1 << I2S_INTCR_RXFIE_SHIFT)
+#define I2S_INTCR_TFT_SHIFT 4
+#define I2S_INTCR_TFT(x) ((x - 1) << I2S_INTCR_TFT_SHIFT)
+#define I2S_INTCR_TFT_MASK (0x1f << I2S_INTCR_TFT_SHIFT)
+#define I2S_INTCR_TXUIC BIT(2)
+#define I2S_INTCR_TXUIE_SHIFT 1
+#define I2S_INTCR_TXUIE_DISABLE (0 << I2S_INTCR_TXUIE_SHIFT)
+#define I2S_INTCR_TXUIE_ENABLE (1 << I2S_INTCR_TXUIE_SHIFT)
+
+/*
+ * INTSR
+ * interrupt status register
+*/
+#define I2S_INTSR_TXEIE_SHIFT 0
+#define I2S_INTSR_TXEIE_DISABLE (0 << I2S_INTSR_TXEIE_SHIFT)
+#define I2S_INTSR_TXEIE_ENABLE (1 << I2S_INTSR_TXEIE_SHIFT)
+#define I2S_INTSR_RXOI_SHIFT 17
+#define I2S_INTSR_RXOI_INA (0 << I2S_INTSR_RXOI_SHIFT)
+#define I2S_INTSR_RXOI_ACT (1 << I2S_INTSR_RXOI_SHIFT)
+#define I2S_INTSR_RXFI_SHIFT 16
+#define I2S_INTSR_RXFI_INA (0 << I2S_INTSR_RXFI_SHIFT)
+#define I2S_INTSR_RXFI_ACT (1 << I2S_INTSR_RXFI_SHIFT)
+#define I2S_INTSR_TXUI_SHIFT 1
+#define I2S_INTSR_TXUI_INA (0 << I2S_INTSR_TXUI_SHIFT)
+#define I2S_INTSR_TXUI_ACT (1 << I2S_INTSR_TXUI_SHIFT)
+#define I2S_INTSR_TXEI_SHIFT 0
+#define I2S_INTSR_TXEI_INA (0 << I2S_INTSR_TXEI_SHIFT)
+#define I2S_INTSR_TXEI_ACT (1 << I2S_INTSR_TXEI_SHIFT)
+
+/*
+ * XFER
+ * Transfer start register
+*/
+#define I2S_XFER_RXS_SHIFT 1
+#define I2S_XFER_RXS_STOP (0 << I2S_XFER_RXS_SHIFT)
+#define I2S_XFER_RXS_START (1 << I2S_XFER_RXS_SHIFT)
+#define I2S_XFER_TXS_SHIFT 0
+#define I2S_XFER_TXS_STOP (0 << I2S_XFER_TXS_SHIFT)
+#define I2S_XFER_TXS_START (1 << I2S_XFER_TXS_SHIFT)
+
+/*
+ * CLR
+ * clear SCLK domain logic register
+*/
+#define I2S_CLR_RXC BIT(1)
+#define I2S_CLR_TXC BIT(0)
+
+/*
+ * TXDR
+ * Transimt FIFO data register, write only.
+*/
+#define I2S_TXDR_MASK (0xff)
+
+/*
+ * RXDR
+ * Receive FIFO data register, write only.
+*/
+#define I2S_RXDR_MASK (0xff)
+
+/* Clock divider id */
+enum {
+ ROCKCHIP_DIV_MCLK = 0,
+ ROCKCHIP_DIV_BCLK,
+};
+
+/* I2S REGS */
+#define I2S_TXCR (0x0000)
+#define I2S_RXCR (0x0004)
+#define I2S_CKR (0x0008)
+#define I2S_FIFOLR (0x000c)
+#define I2S_DMACR (0x0010)
+#define I2S_INTCR (0x0014)
+#define I2S_INTSR (0x0018)
+#define I2S_XFER (0x001c)
+#define I2S_CLR (0x0020)
+#define I2S_TXDR (0x0024)
+#define I2S_RXDR (0x0028)
+
+#endif /* _ROCKCHIP_IIS_H */
diff --git a/sound/soc/rockchip/pcm.h b/sound/soc/rockchip/pcm.h
new file mode 100644
index 0000000..c373058
--- /dev/null
+++ b/sound/soc/rockchip/pcm.h
@@ -0,0 +1,14 @@
+/* sound/soc/rockchip/pcm.h
+ *
+ * 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 _ROCKCHIP_PCM_H
+#define _ROCKCHIP_PCM_H
+
+int rockchip_pcm_platform_register(struct device *dev);
+void rockchip_pcm_platform_unregister(struct device *dev);
+
+#endif /* _ROCKCHIP_PCM_H */
diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
new file mode 100644
index 0000000..bb52ae3
--- /dev/null
+++ b/sound/soc/rockchip/rockchip_i2s.c
@@ -0,0 +1,622 @@
+/* sound/soc/rockchip/i2s.c
+ *
+ * ALSA SoC Audio Layer - Rockchip I2S Controller driver
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/version.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <asm/dma.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "pcm.h"
+#include "i2s.h"
+
+#define DRV_NAME "rockchip-i2s"
+
+struct rk_i2s_dev {
+ void __iomem *regs;
+ struct device *dev;
+
+ struct clk *hclk;
+ struct clk *clk;
+
+ struct snd_dmaengine_dai_dma_data capture_dma_data;
+ struct snd_dmaengine_dai_dma_data playback_dma_data;
+
+ bool i2s_tx_status;
+ bool i2s_rx_status;
+
+ spinlock_t lock;
+};
+
+static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai)
+{
+ return snd_soc_dai_get_drvdata(dai);
+}
+
+static inline void i2s_writel(struct rk_i2s_dev *i2s, u32 value,
+ unsigned int offset)
+{
+ writel_relaxed(value, i2s->regs + offset);
+}
+
+static inline u32 i2s_readl(struct rk_i2s_dev *i2s, unsigned int offset)
+{
+ return readl_relaxed(i2s->regs + offset);
+}
+
+static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on)
+{
+ u32 opr, xfer, clr;
+ unsigned long flags;
+ bool need_delay = false;
+ int try_cnt = 10;
+
+ spin_lock_irqsave(&i2s->lock, flags);
+
+ opr = i2s_readl(i2s, I2S_DMACR);
+ xfer = i2s_readl(i2s, I2S_XFER);
+ clr = i2s_readl(i2s, I2S_CLR);
+
+ if (on) {
+ if ((opr & I2S_DMACR_TDE_ENABLE) == 0) {
+ opr |= I2S_DMACR_TDE_ENABLE;
+ i2s_writel(i2s, opr, I2S_DMACR);
+ }
+
+ if ((xfer & I2S_XFER_TXS_START) == 0 ||
+ (xfer & I2S_XFER_RXS_START) == 0) {
+ xfer |= I2S_XFER_TXS_START;
+ xfer |= I2S_XFER_RXS_START;
+ i2s_writel(i2s, xfer, I2S_XFER);
+ }
+
+ i2s->i2s_tx_status = 1;
+ } else {
+ i2s->i2s_tx_status = 0;
+
+ opr &= ~I2S_DMACR_TDE_ENABLE;
+ i2s_writel(i2s, opr, I2S_DMACR);
+
+ if (i2s->i2s_rx_status == 0) {
+ xfer &= ~I2S_XFER_TXS_START;
+ xfer &= ~I2S_XFER_RXS_START;
+ i2s_writel(i2s, xfer, I2S_XFER);
+
+ clr |= I2S_CLR_TXC;
+ clr |= I2S_CLR_RXC;
+ i2s_writel(i2s, clr, I2S_CLR);
+
+ need_delay = true;
+ }
+ }
+
+ spin_unlock_irqrestore(&i2s->lock, flags);
+
+ if (need_delay) {
+ while (i2s_readl(i2s, I2S_CLR) && try_cnt) {
+ udelay(1);
+ try_cnt--;
+ }
+ }
+}
+
+static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on)
+{
+ u32 opr, xfer, clr;
+ unsigned long flags;
+ bool need_delay = false;
+ int try_cnt = 10;
+
+ spin_lock_irqsave(&i2s->lock, flags);
+
+ opr = i2s_readl(i2s, I2S_DMACR);
+ xfer = i2s_readl(i2s, I2S_XFER);
+ clr = i2s_readl(i2s, I2S_CLR);
+
+ if (on) {
+ if ((opr & I2S_DMACR_RDE_ENABLE) == 0) {
+ opr |= I2S_DMACR_RDE_ENABLE;
+ i2s_writel(i2s, opr, I2S_DMACR);
+ }
+
+ if ((xfer & I2S_XFER_TXS_START) == 0 ||
+ (xfer & I2S_XFER_RXS_START) == 0) {
+ xfer |= I2S_XFER_TXS_START;
+ xfer |= I2S_XFER_RXS_START;
+ i2s_writel(i2s, xfer, I2S_XFER);
+ }
+
+ i2s->i2s_rx_status = 1;
+ } else {
+ i2s->i2s_rx_status = 0;
+
+ opr &= ~I2S_DMACR_RDE_ENABLE;
+ i2s_writel(i2s, opr, I2S_DMACR);
+
+ if (i2s->i2s_tx_status == 0) {
+ xfer &= ~I2S_XFER_RXS_START;
+ xfer &= ~I2S_XFER_TXS_START;
+ i2s_writel(i2s, xfer, I2S_XFER);
+
+ clr |= I2S_CLR_TXC;
+ clr |= I2S_CLR_RXC;
+ i2s_writel(i2s, clr, I2S_CLR);
+
+ need_delay = true;
+ }
+ }
+
+ spin_unlock_irqrestore(&i2s->lock, flags);
+
+ if (need_delay) {
+ while (i2s_readl(i2s, I2S_CLR) && try_cnt) {
+ udelay(1);
+ try_cnt--;
+ }
+ }
+}
+
+static int rockchip_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+ struct rk_i2s_dev *i2s = to_info(cpu_dai);
+ unsigned long flags;
+ u32 tx_ctl, rx_ctl;
+ u32 iis_ckr_value;
+ int ret = 0;
+
+ spin_lock_irqsave(&i2s->lock, flags);
+
+ iis_ckr_value = i2s_readl(i2s, I2S_CKR);
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ iis_ckr_value &= ~I2S_CKR_MSS_MASK;
+ iis_ckr_value |= I2S_CKR_MSS_SLAVE;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ iis_ckr_value &= ~I2S_CKR_MSS_MASK;
+ iis_ckr_value |= I2S_CKR_MSS_MASTER;
+ break;
+ default:
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ i2s_writel(i2s, iis_ckr_value, I2S_CKR);
+
+ tx_ctl = i2s_readl(i2s, I2S_TXCR);
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_RIGHT_J:
+ tx_ctl &= ~I2S_TXCR_IBM_MASK;
+ tx_ctl |= I2S_TXCR_IBM_RSJM;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ tx_ctl &= ~I2S_TXCR_IBM_MASK;
+ tx_ctl |= I2S_TXCR_IBM_LSJM;
+ break;
+ case SND_SOC_DAIFMT_I2S:
+ tx_ctl &= ~I2S_TXCR_IBM_MASK;
+ tx_ctl |= I2S_TXCR_IBM_NORMAL;
+ break;
+ default:
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ i2s_writel(i2s, tx_ctl, I2S_TXCR);
+
+ rx_ctl = i2s_readl(i2s, I2S_RXCR);
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_RIGHT_J:
+ rx_ctl &= ~I2S_RXCR_IBM_MASK;
+ rx_ctl |= I2S_RXCR_IBM_RSJM;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ rx_ctl &= ~I2S_RXCR_IBM_MASK;
+ rx_ctl |= I2S_RXCR_IBM_LSJM;
+ break;
+ case SND_SOC_DAIFMT_I2S:
+ rx_ctl &= ~I2S_RXCR_IBM_MASK;
+ rx_ctl |= I2S_RXCR_IBM_NORMAL;
+ break;
+ default:
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ i2s_writel(i2s, rx_ctl, I2S_RXCR);
+
+exit:
+ spin_unlock_irqrestore(&i2s->lock, flags);
+
+ return ret;
+}
+
+static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+ struct rk_i2s_dev *i2s = to_info(dai);
+ unsigned long flags;
+ u32 tx_ctl, rx_ctl;
+ u32 dmacr;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dai->playback_dma_data = &i2s->playback_dma_data;
+ else
+ dai->capture_dma_data = &i2s->capture_dma_data;
+
+ spin_lock_irqsave(&i2s->lock, flags);
+
+ tx_ctl = i2s_readl(i2s, I2S_TXCR);
+ tx_ctl &= ~I2S_TXCR_VDW_MASK;
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ tx_ctl |= I2S_TXCR_VDW(8);
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ tx_ctl |= I2S_TXCR_VDW(16);
+ break;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ tx_ctl |= I2S_TXCR_VDW(20);
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ tx_ctl |= I2S_TXCR_VDW(24);
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ tx_ctl |= I2S_TXCR_VDW(32);
+ break;
+ }
+
+ i2s_writel(i2s, tx_ctl, I2S_TXCR);
+
+ rx_ctl = i2s_readl(i2s, I2S_TXCR);
+ rx_ctl &= ~I2S_TXCR_VDW_MASK;
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ rx_ctl |= I2S_TXCR_VDW(8);
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ rx_ctl |= I2S_TXCR_VDW(16);
+ break;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ rx_ctl |= I2S_TXCR_VDW(20);
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ rx_ctl |= I2S_TXCR_VDW(24);
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ rx_ctl |= I2S_TXCR_VDW(32);
+ break;
+ }
+
+ i2s_writel(i2s, rx_ctl, I2S_RXCR);
+
+ dmacr = i2s_readl(i2s, I2S_DMACR);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dmacr = ((dmacr & ~I2S_DMACR_TDL_MASK) |
+ I2S_DMACR_TDL(1) |
+ I2S_DMACR_TDE_ENABLE);
+ else
+ dmacr = ((dmacr & ~I2S_DMACR_RDL_MASK) |
+ I2S_DMACR_RDL(1) |
+ I2S_DMACR_RDE_ENABLE);
+
+ i2s_writel(i2s, dmacr, I2S_DMACR);
+
+ spin_unlock_irqrestore(&i2s->lock, flags);
+
+ return 0;
+}
+
+static int rockchip_i2s_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct rk_i2s_dev *i2s = to_info(dai);
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ rockchip_snd_rxctrl(i2s, 1);
+ else
+ rockchip_snd_txctrl(i2s, 1);
+ break;
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ rockchip_snd_rxctrl(i2s, 0);
+ else
+ rockchip_snd_txctrl(i2s, 0);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int rockchip_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct rk_i2s_dev *i2s = to_info(cpu_dai);
+
+ clk_set_rate(i2s->clk, freq);
+
+ return 0;
+}
+
+static int rockchip_i2s_set_clkdiv(struct snd_soc_dai *cpu_dai,
+ int div_id, int div)
+{
+ struct rk_i2s_dev *i2s = to_info(cpu_dai);
+ unsigned long flags;
+ u32 reg;
+ int ret;
+
+ spin_lock_irqsave(&i2s->lock, flags);
+
+ reg = i2s_readl(i2s, I2S_CKR);
+ switch (div_id) {
+ case ROCKCHIP_DIV_BCLK:
+ reg &= ~I2S_CKR_TSD_MASK;
+ reg |= I2S_CKR_TSD(div);
+ reg &= ~I2S_CKR_RSD_MASK;
+ reg |= I2S_CKR_RSD(div);
+ break;
+ case ROCKCHIP_DIV_MCLK:
+ reg &= ~I2S_CKR_MDIV_MASK;
+ reg |= I2S_CKR_MDIV(div);
+ break;
+ default:
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ i2s_writel(i2s, reg, I2S_CKR);
+
+exit:
+ spin_unlock_irqrestore(&i2s->lock, flags);
+
+ return ret;
+}
+
+static struct snd_soc_dai_ops rockchip_i2s_dai_ops = {
+ .trigger = rockchip_i2s_trigger,
+ .hw_params = rockchip_i2s_hw_params,
+ .set_fmt = rockchip_i2s_set_fmt,
+ .set_clkdiv = rockchip_i2s_set_clkdiv,
+ .set_sysclk = rockchip_i2s_set_sysclk,
+};
+
+#define ROCKCHIP_I2S_STEREO_RATES SNDRV_PCM_RATE_8000_96000
+#define ROCKCHIP_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S8)
+
+struct snd_soc_dai_driver rockchip_i2s_dai[] = {
+ {
+ .name = "rockchip-i2s.0",
+ .id = 0,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 8,
+ .rates = ROCKCHIP_I2S_STEREO_RATES,
+ .formats = ROCKCHIP_I2S_FORMATS,
+ },
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = ROCKCHIP_I2S_STEREO_RATES,
+ .formats = ROCKCHIP_I2S_FORMATS,
+ },
+ .ops = &rockchip_i2s_dai_ops,
+ .symmetric_rates = 1,
+ },
+ {
+ .name = "rockchip-i2s.1",
+ .id = 1,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = ROCKCHIP_I2S_STEREO_RATES,
+ .formats = ROCKCHIP_I2S_FORMATS,
+ },
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = ROCKCHIP_I2S_STEREO_RATES,
+ .formats = ROCKCHIP_I2S_FORMATS,
+ },
+ .ops = &rockchip_i2s_dai_ops,
+ .symmetric_rates = 1,
+ },
+};
+
+static const struct snd_soc_component_driver rockchip_i2s_component = {
+ .name = DRV_NAME,
+};
+
+#ifdef CONFIG_PM_RUNTIME
+static int i2s_runtime_suspend(struct device *dev)
+{
+ struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(i2s->clk);
+
+ return 0;
+}
+
+static int i2s_runtime_resume(struct device *dev)
+{
+ struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
+
+ return clk_prepare_enable(i2s->clk);
+}
+#else
+#define i2s_runtime_suspend NULL
+#define i2s_runtime_resume NULL
+#endif
+
+static int rockchip_i2s_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct rk_i2s_dev *i2s;
+ struct resource *res;
+ int ret;
+
+ i2s = devm_kzalloc(&pdev->dev, sizeof(struct rk_i2s_dev),
+ GFP_KERNEL);
+ if (!i2s)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ i2s->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(i2s->regs)) {
+ dev_err(&pdev->dev, "Could not get I2S source, %p\n",
+ i2s->regs);
+ return PTR_ERR(i2s->regs);
+ }
+
+ i2s->playback_dma_data.addr = res->start + I2S_TXDR;
+ i2s->playback_dma_data.addr_width = 4;
+ i2s->playback_dma_data.maxburst = 1;
+
+ i2s->capture_dma_data.addr = res->start + I2S_RXDR;
+ i2s->capture_dma_data.addr_width = 4;
+ i2s->capture_dma_data.maxburst = 1;
+
+ i2s->i2s_tx_status = false;
+ i2s->i2s_rx_status = false;
+
+ spin_lock_init(&i2s->lock);
+
+ ret = rockchip_pcm_platform_register(&pdev->dev);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not register PCM\n");
+ goto err_pcm_register;
+ }
+
+ /* Must success to get some clocks from dt */
+ i2s->hclk = devm_clk_get(&pdev->dev, "i2s_hclk");
+ if (IS_ERR(i2s->hclk)) {
+ dev_err(&pdev->dev, "Could not get i2s_hclk\n");
+ return PTR_ERR(i2s->hclk);
+ }
+
+ i2s->clk = devm_clk_get(&pdev->dev, "i2s_clk");
+ if (IS_ERR(i2s->clk)) {
+ dev_err(&pdev->dev, "Could not get i2s_clk\n");
+ return PTR_ERR(i2s->clk);
+ }
+
+ ret = clk_prepare_enable(i2s->hclk);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not enable i2s_hclk\n");
+ return ret;
+ }
+
+ ret = clk_prepare_enable(i2s->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not enable i2s_clk\n");
+ goto err_hclk_disable;
+ }
+
+ /* Try to set the I2S Channel id from dt */
+ pdev->id = of_alias_get_id(np, "i2s");
+ dev_set_name(&pdev->dev, "%s.%d",
+ pdev->dev.driver->name,
+ pdev->id);
+
+ i2s->dev = &pdev->dev;
+ dev_set_drvdata(&pdev->dev, i2s);
+
+ ret = devm_snd_soc_register_component(&pdev->dev,
+ &rockchip_i2s_component,
+ &rockchip_i2s_dai[pdev->id], 1);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not register DAI\n");
+ goto err_clk_disable;
+ }
+
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+
+err_clk_disable:
+ clk_disable_unprepare(i2s->clk);
+err_hclk_disable:
+ clk_disable_unprepare(i2s->hclk);
+err_pcm_register:
+ rockchip_pcm_platform_unregister(&pdev->dev);
+
+ return ret;
+}
+
+static int rockchip_i2s_remove(struct platform_device *pdev)
+{
+ struct rk_i2s_dev *i2s = dev_get_drvdata(&pdev->dev);
+
+ clk_disable_unprepare(i2s->clk);
+ clk_disable_unprepare(i2s->hclk);
+ rockchip_pcm_platform_unregister(&pdev->dev);
+ snd_soc_unregister_component(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id rockchip_i2s_match[] = {
+ {
+ .compatible = "rockchip,rk3066-i2s"
+ },
+};
+MODULE_DEVICE_TABLE(of, rockchip_i2s_match);
+
+static const struct dev_pm_ops rockchip_i2s_pm_ops = {
+ SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
+ i2s_runtime_resume, NULL)
+};
+
+static struct platform_driver rockchip_i2s_driver = {
+ .probe = rockchip_i2s_probe,
+ .remove = rockchip_i2s_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(rockchip_i2s_match),
+ .pm = &rockchip_i2s_pm_ops,
+ },
+};
+module_platform_driver(rockchip_i2s_driver);
+
+MODULE_DESCRIPTION("ROCKCHIP IIS ASoC Interface");
+MODULE_AUTHOR("jianqun <jay.xu at rock-chips.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/rockchip/rockchip_pcm.c b/sound/soc/rockchip/rockchip_pcm.c
new file mode 100644
index 0000000..454c609
--- /dev/null
+++ b/sound/soc/rockchip/rockchip_pcm.c
@@ -0,0 +1,64 @@
+/* sound/soc/rockchip/pcm.c
+ *
+ * ALSA SoC Audio Layer - Rockchip I2S Controller driver
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "pcm.h"
+
+static const struct snd_pcm_hardware rockchip_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S20_3LE |
+ SNDRV_PCM_FMTBIT_S16_LE,
+ .channels_min = 2,
+ .channels_max = 8,
+ .buffer_bytes_max = 128*1024,
+ .period_bytes_min = 64,
+ .period_bytes_max = 2048*4,
+ .periods_min = 3,
+ .periods_max = 128,
+ .fifo_size = 16,
+};
+
+static const struct snd_dmaengine_pcm_config rockchip_dmaengine_pcm_config = {
+ .pcm_hardware = &rockchip_pcm_hardware,
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+ .compat_filter_fn = NULL,
+ .prealloc_buffer_size = PAGE_SIZE * 8,
+};
+
+int rockchip_pcm_platform_register(struct device *dev)
+{
+ return snd_dmaengine_pcm_register(dev, &rockchip_dmaengine_pcm_config,
+ SND_DMAENGINE_PCM_FLAG_COMPAT|
+ SND_DMAENGINE_PCM_FLAG_NO_RESIDUE);
+}
+EXPORT_SYMBOL_GPL(rockchip_pcm_platform_register);
+
+void rockchip_pcm_platform_unregister(struct device *dev)
+{
+ snd_dmaengine_pcm_unregister(dev);
+}
+EXPORT_SYMBOL_GPL(rockchip_pcm_platform_unregister);
+
+MODULE_DESCRIPTION("ROCKCHIP PCM ASoC Interface");
+MODULE_AUTHOR("jianqun <jay.xu at rock-chips.com>");
+MODULE_LICENSE("GPL v2");
--
1.7.9.5
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