Add a driver which supports transmitting digital sound to an audio codec. This uses fixed parameters as a device-tree binding is not currently defined.
Signed-off-by: Simon Glass sjg@chromium.org ---
arch/arm/include/asm/arch-tegra/tegra_i2s.h | 206 ++++++++++++++++++++ drivers/sound/Makefile | 2 +- drivers/sound/tegra_i2s.c | 124 ++++++++++++ drivers/sound/tegra_i2s_priv.h | 29 +++ 4 files changed, 360 insertions(+), 1 deletion(-) create mode 100644 arch/arm/include/asm/arch-tegra/tegra_i2s.h create mode 100644 drivers/sound/tegra_i2s.c create mode 100644 drivers/sound/tegra_i2s_priv.h
diff --git a/arch/arm/include/asm/arch-tegra/tegra_i2s.h b/arch/arm/include/asm/arch-tegra/tegra_i2s.h new file mode 100644 index 00000000000..9319383f7c1 --- /dev/null +++ b/arch/arm/include/asm/arch-tegra/tegra_i2s.h @@ -0,0 +1,206 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * tegra_i2s.h - Definitions for Tegra124 I2S driver. + * Note, some structures (ex, CIF) are different in Tegra114. + * + * NVIDIA Tegra I2S controller + * Modified from dc tegra_regs.h + * + * Copyright 2018 Google LLC + * + * Copyright (c) 2011-2013, NVIDIA CORPORATION. All rights reserved. + */ + +#ifndef _TEGRA_I2S_H_ +#define _TEGRA_I2S_H_ + +struct i2s_ctlr { + u32 ctrl; /* I2S_CTRL_0, 0x00 */ + u32 timing; /* I2S_TIMING_0, 0x04 */ + u32 offset; /* I2S_OFFSET_0, 0x08 */ + u32 ch_ctrl; /* I2S_CH_CTRL_0, 0x0C */ + u32 slot_ctrl; /* I2S_SLOT_CTRL_0, 0x10 */ + u32 cif_tx_ctrl; /* I2S_CIF_TX_CTRL_0, 0x14 */ + u32 cif_rx_ctrl; /* I2S_CIF_RX_CTRL_0, 0x18 */ + u32 flowctl; /* I2S_FLOWCTL_0, 0x1C */ + u32 tx_step; /* I2S_TX_STEP_0, 0x20 */ + u32 flow_status; /* I2S_FLOW_STATUS_0, 0x24 */ + u32 flow_total; /* I2S_FLOW_TOTAL_0, 0x28 */ + u32 flow_over; /* I2S_FLOW_OVER_0, 0x2C */ + u32 flow_under; /* I2S_FLOW_UNDER_0, 0x30 */ + u32 reserved[12]; /* RESERVED, 0x34 - 0x60 */ + u32 slot_ctrl2; /* I2S_SLOT_CTRL2_0, 0x64*/ +}; + +enum { + I2S_CTRL_XFER_EN_TX = 1 << 31, + I2S_CTRL_XFER_EN_RX = 1 << 30, + I2S_CTRL_CG_EN = 1 << 29, + I2S_CTRL_SOFT_RESET = 1 << 28, + I2S_CTRL_TX_FLOWCTL_EN = 1 << 27, + + I2S_CTRL_OBS_SEL_SHIFT = 24, + I2S_CTRL_OBS_SEL_MASK = 7 << I2S_CTRL_OBS_SEL_SHIFT, + + I2S_FRAME_FORMAT_LRCK = 0, + I2S_FRAME_FORMAT_FSYNC = 1, + + I2S_CTRL_FRAME_FORMAT_SHIFT = 12, + I2S_CTRL_FRAME_FORMAT_MASK = 7 << I2S_CTRL_FRAME_FORMAT_SHIFT, + I2S_CTRL_FRAME_FORMAT_LRCK = I2S_FRAME_FORMAT_LRCK << + I2S_CTRL_FRAME_FORMAT_SHIFT, + I2S_CTRL_FRAME_FORMAT_FSYNC = I2S_FRAME_FORMAT_FSYNC << + I2S_CTRL_FRAME_FORMAT_SHIFT, + + I2S_CTRL_MASTER_ENABLE = 1 << 10, + + I2S_LRCK_LEFT_LOW = 0, + I2S_LRCK_RIGHT_LOW = 1, + + I2S_CTRL_LRCK_SHIFT = 9, + I2S_CTRL_LRCK_MASK = 1 << I2S_CTRL_LRCK_SHIFT, + I2S_CTRL_LRCK_L_LOW = I2S_LRCK_LEFT_LOW << I2S_CTRL_LRCK_SHIFT, + I2S_CTRL_LRCK_R_LOW = I2S_LRCK_RIGHT_LOW << I2S_CTRL_LRCK_SHIFT, + + I2S_CTRL_LPBK_ENABLE = 1 << 8, + + I2S_BIT_CODE_LINEAR = 0, + I2S_BIT_CODE_ULAW = 1, + I2S_BIT_CODE_ALAW = 2, + + I2S_CTRL_BIT_CODE_SHIFT = 4, + I2S_CTRL_BIT_CODE_MASK = 3 << I2S_CTRL_BIT_CODE_SHIFT, + I2S_CTRL_BIT_CODE_LINEAR = I2S_BIT_CODE_LINEAR << + I2S_CTRL_BIT_CODE_SHIFT, + I2S_CTRL_BIT_CODE_ULAW = I2S_BIT_CODE_ULAW << I2S_CTRL_BIT_CODE_SHIFT, + I2S_CTRL_BIT_CODE_ALAW = I2S_BIT_CODE_ALAW << I2S_CTRL_BIT_CODE_SHIFT, + + I2S_BITS_8 = 1, + I2S_BITS_12 = 2, + I2S_BITS_16 = 3, + I2S_BITS_20 = 4, + I2S_BITS_24 = 5, + I2S_BITS_28 = 6, + I2S_BITS_32 = 7, + + /* Sample container size; see {RX,TX}_MASK field in CH_CTRL below */ + I2S_CTRL_BIT_SIZE_SHIFT = 0, + I2S_CTRL_BIT_SIZE_MASK = 7 << I2S_CTRL_BIT_SIZE_SHIFT, + I2S_CTRL_BIT_SIZE_8 = I2S_BITS_8 << I2S_CTRL_BIT_SIZE_SHIFT, + I2S_CTRL_BIT_SIZE_12 = I2S_BITS_12 << I2S_CTRL_BIT_SIZE_SHIFT, + I2S_CTRL_BIT_SIZE_16 = I2S_BITS_16 << I2S_CTRL_BIT_SIZE_SHIFT, + I2S_CTRL_BIT_SIZE_20 = I2S_BITS_20 << I2S_CTRL_BIT_SIZE_SHIFT, + I2S_CTRL_BIT_SIZE_24 = I2S_BITS_24 << I2S_CTRL_BIT_SIZE_SHIFT, + I2S_CTRL_BIT_SIZE_28 = I2S_BITS_28 << I2S_CTRL_BIT_SIZE_SHIFT, + I2S_CTRL_BIT_SIZE_32 = I2S_BITS_32 << I2S_CTRL_BIT_SIZE_SHIFT, + + I2S_TIMING_NON_SYM_ENABLE = 1 << 12, + I2S_TIMING_CHANNEL_BIT_COUNT_SHIFT = 0, + I2S_TIMING_CHANNEL_BIT_COUNT_MASK_US = 0x7ff, + I2S_TIMING_CHANNEL_BIT_COUNT_MASK = + I2S_TIMING_CHANNEL_BIT_COUNT_MASK_US << + I2S_TIMING_CHANNEL_BIT_COUNT_SHIFT, + + I2S_OFFSET_RX_DATA_OFFSET_SHIFT = 16, + I2S_OFFSET_RX_DATA_OFFSET_MASK_US = 0x7ff, + I2S_OFFSET_RX_DATA_OFFSET_MASK = I2S_OFFSET_RX_DATA_OFFSET_MASK_US << + I2S_OFFSET_RX_DATA_OFFSET_SHIFT, + I2S_OFFSET_TX_DATA_OFFSET_SHIFT = 0, + I2S_OFFSET_TX_DATA_OFFSET_MASK_US = 0x7ff, + I2S_OFFSET_TX_DATA_OFFSET_MASK = I2S_OFFSET_TX_DATA_OFFSET_MASK_US << + I2S_OFFSET_TX_DATA_OFFSET_SHIFT, + + /* FSYNC width - 1 in bit clocks */ + I2S_CH_CTRL_FSYNC_WIDTH_SHIFT = 24, + I2S_CH_CTRL_FSYNC_WIDTH_MASK_US = 0xff, + I2S_CH_CTRL_FSYNC_WIDTH_MASK = I2S_CH_CTRL_FSYNC_WIDTH_MASK_US << + I2S_CH_CTRL_FSYNC_WIDTH_SHIFT, + + I2S_HIGHZ_NO = 0, + I2S_HIGHZ_YES = 1, + I2S_HIGHZ_ON_HALF_BIT_CLK = 2, + + I2S_CH_CTRL_HIGHZ_CTRL_SHIFT = 12, + I2S_CH_CTRL_HIGHZ_CTRL_MASK = 3 << I2S_CH_CTRL_HIGHZ_CTRL_SHIFT, + I2S_CH_CTRL_HIGHZ_CTRL_NO = I2S_HIGHZ_NO << + I2S_CH_CTRL_HIGHZ_CTRL_SHIFT, + I2S_CH_CTRL_HIGHZ_CTRL_YES = I2S_HIGHZ_YES << + I2S_CH_CTRL_HIGHZ_CTRL_SHIFT, + I2S_CH_CTRL_HIGHZ_CTRL_ON_HALF_BIT_CLK = I2S_HIGHZ_ON_HALF_BIT_CLK << + I2S_CH_CTRL_HIGHZ_CTRL_SHIFT, + + I2S_MSB_FIRST = 0, + I2S_LSB_FIRST = 1, + + I2S_CH_CTRL_RX_BIT_ORDER_SHIFT = 10, + I2S_CH_CTRL_RX_BIT_ORDER_MASK = 1 << I2S_CH_CTRL_RX_BIT_ORDER_SHIFT, + I2S_CH_CTRL_RX_BIT_ORDER_MSB_FIRST = I2S_MSB_FIRST << + I2S_CH_CTRL_RX_BIT_ORDER_SHIFT, + I2S_CH_CTRL_RX_BIT_ORDER_LSB_FIRST = I2S_LSB_FIRST << + I2S_CH_CTRL_RX_BIT_ORDER_SHIFT, + I2S_CH_CTRL_TX_BIT_ORDER_SHIFT = 9, + I2S_CH_CTRL_TX_BIT_ORDER_MASK = 1 << I2S_CH_CTRL_TX_BIT_ORDER_SHIFT, + I2S_CH_CTRL_TX_BIT_ORDER_MSB_FIRST = I2S_MSB_FIRST << + I2S_CH_CTRL_TX_BIT_ORDER_SHIFT, + I2S_CH_CTRL_TX_BIT_ORDER_LSB_FIRST = I2S_LSB_FIRST << + I2S_CH_CTRL_TX_BIT_ORDER_SHIFT, + + I2S_POS_EDGE = 0, + I2S_NEG_EDGE = 1, + + I2S_CH_CTRL_EGDE_CTRL_SHIFT = 8, + I2S_CH_CTRL_EGDE_CTRL_MASK = 1 << I2S_CH_CTRL_EGDE_CTRL_SHIFT, + I2S_CH_CTRL_EGDE_CTRL_POS_EDGE = I2S_POS_EDGE << + I2S_CH_CTRL_EGDE_CTRL_SHIFT, + I2S_CH_CTRL_EGDE_CTRL_NEG_EDGE = I2S_NEG_EDGE << + I2S_CH_CTRL_EGDE_CTRL_SHIFT, + + /* Sample size is # bits from BIT_SIZE minus this field */ + I2S_CH_CTRL_RX_MASK_BITS_SHIFT = 4, + I2S_CH_CTRL_RX_MASK_BITS_MASK_US = 7, + I2S_CH_CTRL_RX_MASK_BITS_MASK = I2S_CH_CTRL_RX_MASK_BITS_MASK_US << + I2S_CH_CTRL_RX_MASK_BITS_SHIFT, + + I2S_CH_CTRL_TX_MASK_BITS_SHIFT = 0, + I2S_CH_CTRL_TX_MASK_BITS_MASK_US = 7, + I2S_CH_CTRL_TX_MASK_BITS_MASK = I2S_CH_CTRL_TX_MASK_BITS_MASK_US << + I2S_CH_CTRL_TX_MASK_BITS_SHIFT, + + /* Number of slots in frame, minus 1 */ + I2S_SLOT_CTRL_TOTAL_SLOTS_SHIFT = 16, + I2S_SLOT_CTRL_TOTAL_SLOTS_MASK_US = 7, + I2S_SLOT_CTRL_TOTAL_SLOTS_MASK = I2S_SLOT_CTRL_TOTAL_SLOTS_MASK_US << + I2S_SLOT_CTRL_TOTAL_SLOTS_SHIFT, + + /* TDM mode slot enable bitmask */ + I2S_SLOT_CTRL_RX_SLOT_ENABLES_SHIFT = 8, + I2S_SLOT_CTRL_RX_SLOT_ENABLES_MASK = + 0xff << I2S_SLOT_CTRL_RX_SLOT_ENABLES_SHIFT, + + I2S_SLOT_CTRL_TX_SLOT_ENABLES_SHIFT = 0, + I2S_SLOT_CTRL_TX_SLOT_ENABLES_MASK = 0xff << + I2S_SLOT_CTRL_TX_SLOT_ENABLES_SHIFT, + + I2S_FILTER_LINEAR = 0, + I2S_FILTER_QUAD = 1, + + I2S_FLOWCTL_FILTER_SHIFT = 31, + I2S_FLOWCTL_FILTER_MASK = 1 << I2S_FLOWCTL_FILTER_SHIFT, + I2S_FLOWCTL_FILTER_LINEAR = I2S_FILTER_LINEAR << + I2S_FLOWCTL_FILTER_SHIFT, + I2S_FLOWCTL_FILTER_QUAD = I2S_FILTER_QUAD << I2S_FLOWCTL_FILTER_SHIFT, + + I2S_TX_STEP_SHIFT = 0, + I2S_TX_STEP_MASK_US = 0xffff, + I2S_TX_STEP_MASK = I2S_TX_STEP_MASK_US << I2S_TX_STEP_SHIFT, + + I2S_FLOW_STATUS_UNDERFLOW = 1 << 31, + I2S_FLOW_STATUS_OVERFLOW = 1 << 30, + I2S_FLOW_STATUS_MONITOR_INT_EN = 1 << 4, + I2S_FLOW_STATUS_COUNTER_CLR = 1 << 3, + I2S_FLOW_STATUS_MONITOR_CLR = 1 << 2, + I2S_FLOW_STATUS_COUNTER_EN = 1 << 1, + I2S_FLOW_STATUS_MONITOR_EN = 1 << 0, +}; + +#endif /* _TEGRA_I2C_H_ */ diff --git a/drivers/sound/Makefile b/drivers/sound/Makefile index 98d4f13688e..d444c28578a 100644 --- a/drivers/sound/Makefile +++ b/drivers/sound/Makefile @@ -10,7 +10,7 @@ obj-$(CONFIG_SOUND) += sound-uclass.o obj-$(CONFIG_I2S_SAMSUNG) += samsung-i2s.o obj-$(CONFIG_SOUND_SANDBOX) += sandbox.o obj-$(CONFIG_I2S_SAMSUNG) += samsung_sound.o -obj-$(CONFIG_I2S_TEGRA) += tegra_ahub.o +obj-$(CONFIG_I2S_TEGRA) += tegra_ahub.o tegra_i2s.o obj-$(CONFIG_SOUND_WM8994) += wm8994.o obj-$(CONFIG_SOUND_MAX98088) += max98088.o maxim_codec.o obj-$(CONFIG_SOUND_MAX98090) += max98090.o maxim_codec.o diff --git a/drivers/sound/tegra_i2s.c b/drivers/sound/tegra_i2s.c new file mode 100644 index 00000000000..200d005fb6b --- /dev/null +++ b/drivers/sound/tegra_i2s.c @@ -0,0 +1,124 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2018 Google LLC + * Written by Simon Glass sjg@chromium.org + */ +#define LOG_CATEGORY UCLASS_I2S +#define LOG_DEBUG + +#include <common.h> +#include <dm.h> +#include <i2s.h> +#include <misc.h> +#include <sound.h> +#include <asm/io.h> +#include <asm/arch-tegra/tegra_i2s.h> +#include "tegra_i2s_priv.h" + +int tegra_i2s_set_cif_tx_ctrl(struct udevice *dev, u32 value) +{ + struct i2s_uc_priv *priv = dev_get_uclass_priv(dev); + struct i2s_ctlr *regs = (struct i2s_ctlr *)priv->base_address; + + writel(value, ®s->cif_tx_ctrl); + + return 0; +} + +static void tegra_i2s_transmit_enable(struct i2s_ctlr *regs, int on) +{ + clrsetbits_le32(®s->ctrl, I2S_CTRL_XFER_EN_TX, + on ? I2S_CTRL_XFER_EN_TX : 0); +} + +static int i2s_tx_init(struct i2s_uc_priv *pi2s_tx) +{ + struct i2s_ctlr *regs = (struct i2s_ctlr *)pi2s_tx->base_address; + u32 audio_bits = (pi2s_tx->bitspersample >> 2) - 1; + u32 ctrl = readl(®s->ctrl); + + /* Set format to LRCK / Left Low */ + ctrl &= ~(I2S_CTRL_FRAME_FORMAT_MASK | I2S_CTRL_LRCK_MASK); + ctrl |= I2S_CTRL_FRAME_FORMAT_LRCK; + ctrl |= I2S_CTRL_LRCK_L_LOW; + + /* Disable all transmission until we are ready to transfer */ + ctrl &= ~(I2S_CTRL_XFER_EN_TX | I2S_CTRL_XFER_EN_RX); + + /* Serve as master */ + ctrl |= I2S_CTRL_MASTER_ENABLE; + + /* Configure audio bits size */ + ctrl &= ~I2S_CTRL_BIT_SIZE_MASK; + ctrl |= audio_bits << I2S_CTRL_BIT_SIZE_SHIFT; + writel(ctrl, ®s->ctrl); + + /* Timing in LRCK mode: */ + writel(pi2s_tx->bitspersample, ®s->timing); + + /* I2S mode has [TX/RX]_DATA_OFFSET both set to 1 */ + writel(((1 << I2S_OFFSET_RX_DATA_OFFSET_SHIFT) | + (1 << I2S_OFFSET_TX_DATA_OFFSET_SHIFT)), ®s->offset); + + /* FSYNC_WIDTH = 2 clocks wide, TOTAL_SLOTS = 2 slots per fsync */ + writel((2 - 1) << I2S_CH_CTRL_FSYNC_WIDTH_SHIFT, ®s->ch_ctrl); + writel((2 - 1), ®s->slot_ctrl); + + return 0; +} + +static int tegra_i2s_tx_data(struct udevice *dev, void *data, uint data_size) +{ + struct i2s_uc_priv *priv = dev_get_uclass_priv(dev); + struct i2s_ctlr *regs = (struct i2s_ctlr *)priv->base_address; + int ret; + + tegra_i2s_transmit_enable(regs, 1); + ret = misc_write(dev_get_parent(dev), 0, data, data_size); + tegra_i2s_transmit_enable(regs, 0); + if (ret < 0) + return ret; + else if (ret < data_size) + return -EIO; + + return 0; +} + +static int tegra_i2s_probe(struct udevice *dev) +{ + struct i2s_uc_priv *priv = dev_get_uclass_priv(dev); + ulong base; + + base = dev_read_addr(dev); + if (base == FDT_ADDR_T_NONE) { + debug("%s: Missing i2s base\n", __func__); + return -EINVAL; + } + priv->base_address = base; + priv->id = 1; + priv->audio_pll_clk = 4800000; + priv->samplingrate = 48000; + priv->bitspersample = 16; + priv->channels = 2; + priv->rfs = 256; + priv->bfs = 32; + + return i2s_tx_init(priv); +} + +static const struct i2s_ops tegra_i2s_ops = { + .tx_data = tegra_i2s_tx_data, +}; + +static const struct udevice_id tegra_i2s_ids[] = { + { .compatible = "nvidia,tegra124-i2s" }, + { } +}; + +U_BOOT_DRIVER(tegra_i2s) = { + .name = "tegra_i2s", + .id = UCLASS_I2S, + .of_match = tegra_i2s_ids, + .probe = tegra_i2s_probe, + .ops = &tegra_i2s_ops, +}; diff --git a/drivers/sound/tegra_i2s_priv.h b/drivers/sound/tegra_i2s_priv.h new file mode 100644 index 00000000000..7cd3fc808c8 --- /dev/null +++ b/drivers/sound/tegra_i2s_priv.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright 2018 Google LLC + * Written by Simon Glass sjg@chromium.org + */ + +#ifndef __TEGRA_I2S_PRIV_H +#define __TEGRA_I2S_PRIV_H + +enum { + /* Set i2s device (in buf) */ + AHUB_MISCOP_SET_I2S, +}; + +/* + * tegra_i2s_set_cif_tx_ctrl() - Set the I2C port to send to + * + * The CIF is not really part of I2S -- it's for Audio Hub to control + * the interface between I2S and Audio Hub. However since it's put in + * the I2S registers domain instead of the Audio Hub, we need to export + * this as a function. + * + * @dev: I2S device + * @value: Value to write to CIF_TX_CTRL register + * @return 0 + */ +int tegra_i2s_set_cif_tx_ctrl(struct udevice *dev, u32 value); + +#endif