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linux/sound/soc/bcm/cygnus-ssp.c
Simran Rai a6ee05d94e ASoC: cygnus: Add Cygnus audio DAI driver 
This patch adds Cygnus audio DAI driver. It supports I2S, TDM
and SPDIF modes and uses three clocks derived from PLL.

This patchset has been tested on Cygnus wireless audio
bcm958305K board.

Signed-off-by: Lori Hikichi <lhikichi@broadcom.com>
Signed-off-by: Simran Rai <ssimran@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Arun Parameswaran <arunp@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-05-31 17:50:42 +01:00

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/*
* Copyright (C) 2014-2015 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "cygnus-ssp.h"
#define DEFAULT_VCO 1354750204
#define CYGNUS_TDM_RATE \
(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | \
SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_22050 | \
SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000)
#define CAPTURE_FCI_ID_BASE 0x180
#define CYGNUS_SSP_TRISTATE_MASK 0x001fff
#define CYGNUS_PLLCLKSEL_MASK 0xf
/* Used with stream_on field to indicate which streams are active */
#define PLAYBACK_STREAM_MASK BIT(0)
#define CAPTURE_STREAM_MASK BIT(1)
#define I2S_STREAM_CFG_MASK 0xff003ff
#define I2S_CAP_STREAM_CFG_MASK 0xf0
#define SPDIF_STREAM_CFG_MASK 0x3ff
#define CH_GRP_STEREO 0x1
/* Begin register offset defines */
#define AUD_MISC_SEROUT_OE_REG_BASE 0x01c
#define AUD_MISC_SEROUT_SPDIF_OE 12
#define AUD_MISC_SEROUT_MCLK_OE 3
#define AUD_MISC_SEROUT_LRCK_OE 2
#define AUD_MISC_SEROUT_SCLK_OE 1
#define AUD_MISC_SEROUT_SDAT_OE 0
/* AUD_FMM_BF_CTRL_xxx regs */
#define BF_DST_CFG0_OFFSET 0x100
#define BF_DST_CFG1_OFFSET 0x104
#define BF_DST_CFG2_OFFSET 0x108
#define BF_DST_CTRL0_OFFSET 0x130
#define BF_DST_CTRL1_OFFSET 0x134
#define BF_DST_CTRL2_OFFSET 0x138
#define BF_SRC_CFG0_OFFSET 0x148
#define BF_SRC_CFG1_OFFSET 0x14c
#define BF_SRC_CFG2_OFFSET 0x150
#define BF_SRC_CFG3_OFFSET 0x154
#define BF_SRC_CTRL0_OFFSET 0x1c0
#define BF_SRC_CTRL1_OFFSET 0x1c4
#define BF_SRC_CTRL2_OFFSET 0x1c8
#define BF_SRC_CTRL3_OFFSET 0x1cc
#define BF_SRC_GRP0_OFFSET 0x1fc
#define BF_SRC_GRP1_OFFSET 0x200
#define BF_SRC_GRP2_OFFSET 0x204
#define BF_SRC_GRP3_OFFSET 0x208
#define BF_SRC_GRP_EN_OFFSET 0x320
#define BF_SRC_GRP_FLOWON_OFFSET 0x324
#define BF_SRC_GRP_SYNC_DIS_OFFSET 0x328
/* AUD_FMM_IOP_OUT_I2S_xxx regs */
#define OUT_I2S_0_STREAM_CFG_OFFSET 0xa00
#define OUT_I2S_0_CFG_OFFSET 0xa04
#define OUT_I2S_0_MCLK_CFG_OFFSET 0xa0c
#define OUT_I2S_1_STREAM_CFG_OFFSET 0xa40
#define OUT_I2S_1_CFG_OFFSET 0xa44
#define OUT_I2S_1_MCLK_CFG_OFFSET 0xa4c
#define OUT_I2S_2_STREAM_CFG_OFFSET 0xa80
#define OUT_I2S_2_CFG_OFFSET 0xa84
#define OUT_I2S_2_MCLK_CFG_OFFSET 0xa8c
/* AUD_FMM_IOP_OUT_SPDIF_xxx regs */
#define SPDIF_STREAM_CFG_OFFSET 0xac0
#define SPDIF_CTRL_OFFSET 0xac4
#define SPDIF_FORMAT_CFG_OFFSET 0xad8
#define SPDIF_MCLK_CFG_OFFSET 0xadc
/* AUD_FMM_IOP_PLL_0_xxx regs */
#define IOP_PLL_0_MACRO_OFFSET 0xb00
#define IOP_PLL_0_MDIV_Ch0_OFFSET 0xb14
#define IOP_PLL_0_MDIV_Ch1_OFFSET 0xb18
#define IOP_PLL_0_MDIV_Ch2_OFFSET 0xb1c
#define IOP_PLL_0_ACTIVE_MDIV_Ch0_OFFSET 0xb30
#define IOP_PLL_0_ACTIVE_MDIV_Ch1_OFFSET 0xb34
#define IOP_PLL_0_ACTIVE_MDIV_Ch2_OFFSET 0xb38
/* AUD_FMM_IOP_xxx regs */
#define IOP_PLL_0_CONTROL_OFFSET 0xb04
#define IOP_PLL_0_USER_NDIV_OFFSET 0xb08
#define IOP_PLL_0_ACTIVE_NDIV_OFFSET 0xb20
#define IOP_PLL_0_RESET_OFFSET 0xb5c
/* AUD_FMM_IOP_IN_I2S_xxx regs */
#define IN_I2S_0_STREAM_CFG_OFFSET 0x00
#define IN_I2S_0_CFG_OFFSET 0x04
#define IN_I2S_1_STREAM_CFG_OFFSET 0x40
#define IN_I2S_1_CFG_OFFSET 0x44
#define IN_I2S_2_STREAM_CFG_OFFSET 0x80
#define IN_I2S_2_CFG_OFFSET 0x84
/* AUD_FMM_IOP_MISC_xxx regs */
#define IOP_SW_INIT_LOGIC 0x1c0
/* End register offset defines */
/* AUD_FMM_IOP_OUT_I2S_x_MCLK_CFG_0_REG */
#define I2S_OUT_MCLKRATE_SHIFT 16
/* AUD_FMM_IOP_OUT_I2S_x_MCLK_CFG_REG */
#define I2S_OUT_PLLCLKSEL_SHIFT 0
/* AUD_FMM_IOP_OUT_I2S_x_STREAM_CFG */
#define I2S_OUT_STREAM_ENA 31
#define I2S_OUT_STREAM_CFG_GROUP_ID 20
#define I2S_OUT_STREAM_CFG_CHANNEL_GROUPING 24
/* AUD_FMM_IOP_IN_I2S_x_CAP */
#define I2S_IN_STREAM_CFG_CAP_ENA 31
#define I2S_IN_STREAM_CFG_0_GROUP_ID 4
/* AUD_FMM_IOP_OUT_I2S_x_I2S_CFG_REG */
#define I2S_OUT_CFGX_CLK_ENA 0
#define I2S_OUT_CFGX_DATA_ENABLE 1
#define I2S_OUT_CFGX_DATA_ALIGNMENT 6
#define I2S_OUT_CFGX_BITS_PER_SLOT 13
#define I2S_OUT_CFGX_VALID_SLOT 14
#define I2S_OUT_CFGX_FSYNC_WIDTH 18
#define I2S_OUT_CFGX_SCLKS_PER_1FS_DIV32 26
#define I2S_OUT_CFGX_SLAVE_MODE 30
#define I2S_OUT_CFGX_TDM_MODE 31
/* AUD_FMM_BF_CTRL_SOURCECH_CFGx_REG */
#define BF_SRC_CFGX_SFIFO_ENA 0
#define BF_SRC_CFGX_BUFFER_PAIR_ENABLE 1
#define BF_SRC_CFGX_SAMPLE_CH_MODE 2
#define BF_SRC_CFGX_SFIFO_SZ_DOUBLE 5
#define BF_SRC_CFGX_NOT_PAUSE_WHEN_EMPTY 10
#define BF_SRC_CFGX_BIT_RES 20
#define BF_SRC_CFGX_PROCESS_SEQ_ID_VALID 31
/* AUD_FMM_BF_CTRL_DESTCH_CFGx_REG */
#define BF_DST_CFGX_CAP_ENA 0
#define BF_DST_CFGX_BUFFER_PAIR_ENABLE 1
#define BF_DST_CFGX_DFIFO_SZ_DOUBLE 2
#define BF_DST_CFGX_NOT_PAUSE_WHEN_FULL 11
#define BF_DST_CFGX_FCI_ID 12
#define BF_DST_CFGX_CAP_MODE 24
#define BF_DST_CFGX_PROC_SEQ_ID_VALID 31
/* AUD_FMM_IOP_OUT_SPDIF_xxx */
#define SPDIF_0_OUT_DITHER_ENA 3
#define SPDIF_0_OUT_STREAM_ENA 31
/* AUD_FMM_IOP_PLL_0_USER */
#define IOP_PLL_0_USER_NDIV_FRAC 10
/* AUD_FMM_IOP_PLL_0_ACTIVE */
#define IOP_PLL_0_ACTIVE_NDIV_FRAC 10
#define INIT_SSP_REGS(num) (struct cygnus_ssp_regs){ \
.i2s_stream_cfg = OUT_I2S_ ##num## _STREAM_CFG_OFFSET, \
.i2s_cap_stream_cfg = IN_I2S_ ##num## _STREAM_CFG_OFFSET, \
.i2s_cfg = OUT_I2S_ ##num## _CFG_OFFSET, \
.i2s_cap_cfg = IN_I2S_ ##num## _CFG_OFFSET, \
.i2s_mclk_cfg = OUT_I2S_ ##num## _MCLK_CFG_OFFSET, \
.bf_destch_ctrl = BF_DST_CTRL ##num## _OFFSET, \
.bf_destch_cfg = BF_DST_CFG ##num## _OFFSET, \
.bf_sourcech_ctrl = BF_SRC_CTRL ##num## _OFFSET, \
.bf_sourcech_cfg = BF_SRC_CFG ##num## _OFFSET, \
.bf_sourcech_grp = BF_SRC_GRP ##num## _OFFSET \
}
struct pll_macro_entry {
u32 mclk;
u32 pll_ch_num;
};
/*
* PLL has 3 output channels (1x, 2x, and 4x). Below are
* the common MCLK frequencies used by audio driver
*/
static const struct pll_macro_entry pll_predef_mclk[] = {
{ 4096000, 0},
{ 8192000, 1},
{16384000, 2},
{ 5644800, 0},
{11289600, 1},
{22579200, 2},
{ 6144000, 0},
{12288000, 1},
{24576000, 2},
{12288000, 0},
{24576000, 1},
{49152000, 2},
{22579200, 0},
{45158400, 1},
{90316800, 2},
{24576000, 0},
{49152000, 1},
{98304000, 2},
};
/* List of valid frame sizes for tdm mode */
static const int ssp_valid_tdm_framesize[] = {32, 64, 128, 256, 512};
/*
* Use this relationship to derive the sampling rate (lrclk)
* lrclk = (mclk) / ((2*mclk_to_sclk_ratio) * (32 * SCLK))).
*
* Use mclk and pll_ch from the table above
*
* Valid SCLK = 0/1/2/4/8/12
*
* mclk_to_sclk_ratio = number of MCLK per SCLK. Division is twice the
* value programmed in this field.
* Valid mclk_to_sclk_ratio = 1 through to 15
*
* eg: To set lrclk = 48khz, set mclk = 12288000, mclk_to_sclk_ratio = 2,
* SCLK = 64
*/
struct _ssp_clk_coeff {
u32 mclk;
u32 sclk_rate;
u32 rate;
u32 mclk_rate;
};
static const struct _ssp_clk_coeff ssp_clk_coeff[] = {
{ 4096000, 32, 16000, 4},
{ 4096000, 32, 32000, 2},
{ 4096000, 64, 8000, 4},
{ 4096000, 64, 16000, 2},
{ 4096000, 64, 32000, 1},
{ 4096000, 128, 8000, 2},
{ 4096000, 128, 16000, 1},
{ 4096000, 256, 8000, 1},
{ 6144000, 32, 16000, 6},
{ 6144000, 32, 32000, 3},
{ 6144000, 32, 48000, 2},
{ 6144000, 32, 96000, 1},
{ 6144000, 64, 8000, 6},
{ 6144000, 64, 16000, 3},
{ 6144000, 64, 48000, 1},
{ 6144000, 128, 8000, 3},
{ 8192000, 32, 32000, 4},
{ 8192000, 64, 16000, 4},
{ 8192000, 64, 32000, 2},
{ 8192000, 128, 8000, 4},
{ 8192000, 128, 16000, 2},
{ 8192000, 128, 32000, 1},
{ 8192000, 256, 8000, 2},
{ 8192000, 256, 16000, 1},
{ 8192000, 512, 8000, 1},
{12288000, 32, 32000, 6},
{12288000, 32, 48000, 4},
{12288000, 32, 96000, 2},
{12288000, 32, 192000, 1},
{12288000, 64, 16000, 6},
{12288000, 64, 32000, 3},
{12288000, 64, 48000, 2},
{12288000, 64, 96000, 1},
{12288000, 128, 8000, 6},
{12288000, 128, 16000, 3},
{12288000, 128, 48000, 1},
{12288000, 256, 8000, 3},
{16384000, 64, 32000, 4},
{16384000, 128, 16000, 4},
{16384000, 128, 32000, 2},
{16384000, 256, 8000, 4},
{16384000, 256, 16000, 2},
{16384000, 256, 32000, 1},
{16384000, 512, 8000, 2},
{16384000, 512, 16000, 1},
{24576000, 32, 96000, 4},
{24576000, 32, 192000, 2},
{24576000, 64, 32000, 6},
{24576000, 64, 48000, 4},
{24576000, 64, 96000, 2},
{24576000, 64, 192000, 1},
{24576000, 128, 16000, 6},
{24576000, 128, 32000, 3},
{24576000, 128, 48000, 2},
{24576000, 256, 8000, 6},
{24576000, 256, 16000, 3},
{24576000, 256, 48000, 1},
{24576000, 512, 8000, 3},
{49152000, 32, 192000, 4},
{49152000, 64, 96000, 4},
{49152000, 64, 192000, 2},
{49152000, 128, 32000, 6},
{49152000, 128, 48000, 4},
{49152000, 128, 96000, 2},
{49152000, 128, 192000, 1},
{49152000, 256, 16000, 6},
{49152000, 256, 32000, 3},
{49152000, 256, 48000, 2},
{49152000, 256, 96000, 1},
{49152000, 512, 8000, 6},
{49152000, 512, 16000, 3},
{49152000, 512, 48000, 1},
{ 5644800, 32, 22050, 4},
{ 5644800, 32, 44100, 2},
{ 5644800, 32, 88200, 1},
{ 5644800, 64, 11025, 4},
{ 5644800, 64, 22050, 2},
{ 5644800, 64, 44100, 1},
{11289600, 32, 44100, 4},
{11289600, 32, 88200, 2},
{11289600, 32, 176400, 1},
{11289600, 64, 22050, 4},
{11289600, 64, 44100, 2},
{11289600, 64, 88200, 1},
{11289600, 128, 11025, 4},
{11289600, 128, 22050, 2},
{11289600, 128, 44100, 1},
{22579200, 32, 88200, 4},
{22579200, 32, 176400, 2},
{22579200, 64, 44100, 4},
{22579200, 64, 88200, 2},
{22579200, 64, 176400, 1},
{22579200, 128, 22050, 4},
{22579200, 128, 44100, 2},
{22579200, 128, 88200, 1},
{22579200, 256, 11025, 4},
{22579200, 256, 22050, 2},
{22579200, 256, 44100, 1},
{45158400, 32, 176400, 4},
{45158400, 64, 88200, 4},
{45158400, 64, 176400, 2},
{45158400, 128, 44100, 4},
{45158400, 128, 88200, 2},
{45158400, 128, 176400, 1},
{45158400, 256, 22050, 4},
{45158400, 256, 44100, 2},
{45158400, 256, 88200, 1},
{45158400, 512, 11025, 4},
{45158400, 512, 22050, 2},
{45158400, 512, 44100, 1},
};
static struct cygnus_aio_port *cygnus_dai_get_portinfo(struct snd_soc_dai *dai)
{
struct cygnus_audio *cygaud = snd_soc_dai_get_drvdata(dai);
return &cygaud->portinfo[dai->id];
}
static int audio_ssp_init_portregs(struct cygnus_aio_port *aio)
{
u32 value, fci_id;
int status = 0;
switch (aio->port_type) {
case PORT_TDM:
value = readl(aio->cygaud->audio + aio->regs.i2s_stream_cfg);
value &= ~I2S_STREAM_CFG_MASK;
/* Set Group ID */
writel(aio->portnum,
aio->cygaud->audio + aio->regs.bf_sourcech_grp);
/* Configure the AUD_FMM_IOP_OUT_I2S_x_STREAM_CFG reg */
value |= aio->portnum << I2S_OUT_STREAM_CFG_GROUP_ID;
value |= aio->portnum; /* FCI ID is the port num */
value |= CH_GRP_STEREO << I2S_OUT_STREAM_CFG_CHANNEL_GROUPING;
writel(value, aio->cygaud->audio + aio->regs.i2s_stream_cfg);
/* Configure the AUD_FMM_BF_CTRL_SOURCECH_CFGX reg */
value = readl(aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
value &= ~BIT(BF_SRC_CFGX_NOT_PAUSE_WHEN_EMPTY);
value |= BIT(BF_SRC_CFGX_SFIFO_SZ_DOUBLE);
value |= BIT(BF_SRC_CFGX_PROCESS_SEQ_ID_VALID);
writel(value, aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
/* Configure the AUD_FMM_IOP_IN_I2S_x_CAP_STREAM_CFG_0 reg */
value = readl(aio->cygaud->i2s_in +
aio->regs.i2s_cap_stream_cfg);
value &= ~I2S_CAP_STREAM_CFG_MASK;
value |= aio->portnum << I2S_IN_STREAM_CFG_0_GROUP_ID;
writel(value, aio->cygaud->i2s_in +
aio->regs.i2s_cap_stream_cfg);
/* Configure the AUD_FMM_BF_CTRL_DESTCH_CFGX_REG_BASE reg */
fci_id = CAPTURE_FCI_ID_BASE + aio->portnum;
value = readl(aio->cygaud->audio + aio->regs.bf_destch_cfg);
value |= BIT(BF_DST_CFGX_DFIFO_SZ_DOUBLE);
value &= ~BIT(BF_DST_CFGX_NOT_PAUSE_WHEN_FULL);
value |= (fci_id << BF_DST_CFGX_FCI_ID);
value |= BIT(BF_DST_CFGX_PROC_SEQ_ID_VALID);
writel(value, aio->cygaud->audio + aio->regs.bf_destch_cfg);
/* Enable the transmit pin for this port */
value = readl(aio->cygaud->audio + AUD_MISC_SEROUT_OE_REG_BASE);
value &= ~BIT((aio->portnum * 4) + AUD_MISC_SEROUT_SDAT_OE);
writel(value, aio->cygaud->audio + AUD_MISC_SEROUT_OE_REG_BASE);
break;
case PORT_SPDIF:
writel(aio->portnum, aio->cygaud->audio + BF_SRC_GRP3_OFFSET);
value = readl(aio->cygaud->audio + SPDIF_CTRL_OFFSET);
value |= BIT(SPDIF_0_OUT_DITHER_ENA);
writel(value, aio->cygaud->audio + SPDIF_CTRL_OFFSET);
/* Enable and set the FCI ID for the SPDIF channel */
value = readl(aio->cygaud->audio + SPDIF_STREAM_CFG_OFFSET);
value &= ~SPDIF_STREAM_CFG_MASK;
value |= aio->portnum; /* FCI ID is the port num */
value |= BIT(SPDIF_0_OUT_STREAM_ENA);
writel(value, aio->cygaud->audio + SPDIF_STREAM_CFG_OFFSET);
value = readl(aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
value &= ~BIT(BF_SRC_CFGX_NOT_PAUSE_WHEN_EMPTY);
value |= BIT(BF_SRC_CFGX_SFIFO_SZ_DOUBLE);
value |= BIT(BF_SRC_CFGX_PROCESS_SEQ_ID_VALID);
writel(value, aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
/* Enable the spdif output pin */
value = readl(aio->cygaud->audio + AUD_MISC_SEROUT_OE_REG_BASE);
value &= ~BIT(AUD_MISC_SEROUT_SPDIF_OE);
writel(value, aio->cygaud->audio + AUD_MISC_SEROUT_OE_REG_BASE);
break;
default:
dev_err(aio->cygaud->dev, "Port not supported\n");
status = -EINVAL;
}
return status;
}
static void audio_ssp_in_enable(struct cygnus_aio_port *aio)
{
u32 value;
value = readl(aio->cygaud->audio + aio->regs.bf_destch_cfg);
value |= BIT(BF_DST_CFGX_CAP_ENA);
writel(value, aio->cygaud->audio + aio->regs.bf_destch_cfg);
writel(0x1, aio->cygaud->audio + aio->regs.bf_destch_ctrl);
value = readl(aio->cygaud->audio + aio->regs.i2s_cfg);
value |= BIT(I2S_OUT_CFGX_CLK_ENA);
value |= BIT(I2S_OUT_CFGX_DATA_ENABLE);
writel(value, aio->cygaud->audio + aio->regs.i2s_cfg);
value = readl(aio->cygaud->i2s_in + aio->regs.i2s_cap_stream_cfg);
value |= BIT(I2S_IN_STREAM_CFG_CAP_ENA);
writel(value, aio->cygaud->i2s_in + aio->regs.i2s_cap_stream_cfg);
aio->streams_on |= CAPTURE_STREAM_MASK;
}
static void audio_ssp_in_disable(struct cygnus_aio_port *aio)
{
u32 value;
value = readl(aio->cygaud->i2s_in + aio->regs.i2s_cap_stream_cfg);
value &= ~BIT(I2S_IN_STREAM_CFG_CAP_ENA);
writel(value, aio->cygaud->i2s_in + aio->regs.i2s_cap_stream_cfg);
aio->streams_on &= ~CAPTURE_STREAM_MASK;
/* If both playback and capture are off */
if (!aio->streams_on) {
value = readl(aio->cygaud->audio + aio->regs.i2s_cfg);
value &= ~BIT(I2S_OUT_CFGX_CLK_ENA);
value &= ~BIT(I2S_OUT_CFGX_DATA_ENABLE);
writel(value, aio->cygaud->audio + aio->regs.i2s_cfg);
}
writel(0x0, aio->cygaud->audio + aio->regs.bf_destch_ctrl);
value = readl(aio->cygaud->audio + aio->regs.bf_destch_cfg);
value &= ~BIT(BF_DST_CFGX_CAP_ENA);
writel(value, aio->cygaud->audio + aio->regs.bf_destch_cfg);
}
static int audio_ssp_out_enable(struct cygnus_aio_port *aio)
{
u32 value;
int status = 0;
switch (aio->port_type) {
case PORT_TDM:
value = readl(aio->cygaud->audio + aio->regs.i2s_stream_cfg);
value |= BIT(I2S_OUT_STREAM_ENA);
writel(value, aio->cygaud->audio + aio->regs.i2s_stream_cfg);
writel(1, aio->cygaud->audio + aio->regs.bf_sourcech_ctrl);
value = readl(aio->cygaud->audio + aio->regs.i2s_cfg);
value |= BIT(I2S_OUT_CFGX_CLK_ENA);
value |= BIT(I2S_OUT_CFGX_DATA_ENABLE);
writel(value, aio->cygaud->audio + aio->regs.i2s_cfg);
value = readl(aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
value |= BIT(BF_SRC_CFGX_SFIFO_ENA);
writel(value, aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
aio->streams_on |= PLAYBACK_STREAM_MASK;
break;
case PORT_SPDIF:
value = readl(aio->cygaud->audio + SPDIF_FORMAT_CFG_OFFSET);
value |= 0x3;
writel(value, aio->cygaud->audio + SPDIF_FORMAT_CFG_OFFSET);
writel(1, aio->cygaud->audio + aio->regs.bf_sourcech_ctrl);
value = readl(aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
value |= BIT(BF_SRC_CFGX_SFIFO_ENA);
writel(value, aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
break;
default:
dev_err(aio->cygaud->dev,
"Port not supported %d\n", aio->portnum);
status = -EINVAL;
}
return status;
}
static int audio_ssp_out_disable(struct cygnus_aio_port *aio)
{
u32 value;
int status = 0;
switch (aio->port_type) {
case PORT_TDM:
aio->streams_on &= ~PLAYBACK_STREAM_MASK;
/* If both playback and capture are off */
if (!aio->streams_on) {
value = readl(aio->cygaud->audio + aio->regs.i2s_cfg);
value &= ~BIT(I2S_OUT_CFGX_CLK_ENA);
value &= ~BIT(I2S_OUT_CFGX_DATA_ENABLE);
writel(value, aio->cygaud->audio + aio->regs.i2s_cfg);
}
/* set group_sync_dis = 1 */
value = readl(aio->cygaud->audio + BF_SRC_GRP_SYNC_DIS_OFFSET);
value |= BIT(aio->portnum);
writel(value, aio->cygaud->audio + BF_SRC_GRP_SYNC_DIS_OFFSET);
writel(0, aio->cygaud->audio + aio->regs.bf_sourcech_ctrl);
value = readl(aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
value &= ~BIT(BF_SRC_CFGX_SFIFO_ENA);
writel(value, aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
/* set group_sync_dis = 0 */
value = readl(aio->cygaud->audio + BF_SRC_GRP_SYNC_DIS_OFFSET);
value &= ~BIT(aio->portnum);
writel(value, aio->cygaud->audio + BF_SRC_GRP_SYNC_DIS_OFFSET);
value = readl(aio->cygaud->audio + aio->regs.i2s_stream_cfg);
value &= ~BIT(I2S_OUT_STREAM_ENA);
writel(value, aio->cygaud->audio + aio->regs.i2s_stream_cfg);
/* IOP SW INIT on OUT_I2S_x */
value = readl(aio->cygaud->i2s_in + IOP_SW_INIT_LOGIC);
value |= BIT(aio->portnum);
writel(value, aio->cygaud->i2s_in + IOP_SW_INIT_LOGIC);
value &= ~BIT(aio->portnum);
writel(value, aio->cygaud->i2s_in + IOP_SW_INIT_LOGIC);
break;
case PORT_SPDIF:
value = readl(aio->cygaud->audio + SPDIF_FORMAT_CFG_OFFSET);
value &= ~0x3;
writel(value, aio->cygaud->audio + SPDIF_FORMAT_CFG_OFFSET);
writel(0, aio->cygaud->audio + aio->regs.bf_sourcech_ctrl);
value = readl(aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
value &= ~BIT(BF_SRC_CFGX_SFIFO_ENA);
writel(value, aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
break;
default:
dev_err(aio->cygaud->dev,
"Port not supported %d\n", aio->portnum);
status = -EINVAL;
}
return status;
}
static int pll_configure_mclk(struct cygnus_audio *cygaud, u32 mclk,
struct cygnus_aio_port *aio)
{
int i = 0, error;
bool found = false;
const struct pll_macro_entry *p_entry;
struct clk *ch_clk;
for (i = 0; i < ARRAY_SIZE(pll_predef_mclk); i++) {
p_entry = &pll_predef_mclk[i];
if (p_entry->mclk == mclk) {
found = true;
break;
}
}
if (!found) {
dev_err(cygaud->dev,
"%s No valid mclk freq (%u) found!\n", __func__, mclk);
return -EINVAL;
}
ch_clk = cygaud->audio_clk[p_entry->pll_ch_num];
if ((aio->clk_trace.cap_en) && (!aio->clk_trace.cap_clk_en)) {
error = clk_prepare_enable(ch_clk);
if (error) {
dev_err(cygaud->dev, "%s clk_prepare_enable failed %d\n",
__func__, error);
return error;
}
aio->clk_trace.cap_clk_en = true;
}
if ((aio->clk_trace.play_en) && (!aio->clk_trace.play_clk_en)) {
error = clk_prepare_enable(ch_clk);
if (error) {
dev_err(cygaud->dev, "%s clk_prepare_enable failed %d\n",
__func__, error);
return error;
}
aio->clk_trace.play_clk_en = true;
}
error = clk_set_rate(ch_clk, mclk);
if (error) {
dev_err(cygaud->dev, "%s Set MCLK rate failed: %d\n",
__func__, error);
return error;
}
return p_entry->pll_ch_num;
}
static int cygnus_ssp_set_clocks(struct cygnus_aio_port *aio,
struct cygnus_audio *cygaud)
{
u32 value, i = 0;
u32 mask = 0xf;
u32 sclk;
bool found = false;
const struct _ssp_clk_coeff *p_entry = NULL;
for (i = 0; i < ARRAY_SIZE(ssp_clk_coeff); i++) {
p_entry = &ssp_clk_coeff[i];
if ((p_entry->rate == aio->lrclk) &&
(p_entry->sclk_rate == aio->bit_per_frame) &&
(p_entry->mclk == aio->mclk)) {
found = true;
break;
}
}
if (!found) {
dev_err(aio->cygaud->dev,
"No valid match found in ssp_clk_coeff array\n");
dev_err(aio->cygaud->dev, "lrclk = %u, bits/frame = %u, mclk = %u\n",
aio->lrclk, aio->bit_per_frame, aio->mclk);
return -EINVAL;
}
sclk = aio->bit_per_frame;
if (sclk == 512)
sclk = 0;
/* sclks_per_1fs_div = sclk cycles/32 */
sclk /= 32;
/* Set sclk rate */
switch (aio->port_type) {
case PORT_TDM:
/* Set number of bitclks per frame */
value = readl(aio->cygaud->audio + aio->regs.i2s_cfg);
value &= ~(mask << I2S_OUT_CFGX_SCLKS_PER_1FS_DIV32);
value |= sclk << I2S_OUT_CFGX_SCLKS_PER_1FS_DIV32;
writel(value, aio->cygaud->audio + aio->regs.i2s_cfg);
dev_dbg(aio->cygaud->dev,
"SCLKS_PER_1FS_DIV32 = 0x%x\n", value);
break;
case PORT_SPDIF:
break;
default:
dev_err(aio->cygaud->dev, "Unknown port type\n");
return -EINVAL;
}
/* Set MCLK_RATE ssp port (spdif and ssp are the same) */
value = readl(aio->cygaud->audio + aio->regs.i2s_mclk_cfg);
value &= ~(0xf << I2S_OUT_MCLKRATE_SHIFT);
value |= (p_entry->mclk_rate << I2S_OUT_MCLKRATE_SHIFT);
writel(value, aio->cygaud->audio + aio->regs.i2s_mclk_cfg);
dev_dbg(aio->cygaud->dev, "mclk cfg reg = 0x%x\n", value);
dev_dbg(aio->cygaud->dev, "bits per frame = %u, mclk = %u Hz, lrclk = %u Hz\n",
aio->bit_per_frame, aio->mclk, aio->lrclk);
return 0;
}
static int cygnus_ssp_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct cygnus_aio_port *aio = cygnus_dai_get_portinfo(dai);
struct cygnus_audio *cygaud = snd_soc_dai_get_drvdata(dai);
int rate, bitres;
u32 value;
u32 mask = 0x1f;
int ret = 0;
dev_dbg(aio->cygaud->dev, "%s port = %d\n", __func__, aio->portnum);
dev_dbg(aio->cygaud->dev, "params_channels %d\n",
params_channels(params));
dev_dbg(aio->cygaud->dev, "rate %d\n", params_rate(params));
dev_dbg(aio->cygaud->dev, "format %d\n", params_format(params));
rate = params_rate(params);
switch (aio->mode) {
case CYGNUS_SSPMODE_TDM:
if ((rate == 192000) && (params_channels(params) > 4)) {
dev_err(aio->cygaud->dev, "Cannot run %d channels at %dHz\n",
params_channels(params), rate);
return -EINVAL;
}
break;
case CYGNUS_SSPMODE_I2S:
aio->bit_per_frame = 64; /* I2S must be 64 bit per frame */
break;
default:
dev_err(aio->cygaud->dev,
"%s port running in unknown mode\n", __func__);
return -EINVAL;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
value = readl(aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
value &= ~BIT(BF_SRC_CFGX_BUFFER_PAIR_ENABLE);
/* Configure channels as mono or stereo/TDM */
if (params_channels(params) == 1)
value |= BIT(BF_SRC_CFGX_SAMPLE_CH_MODE);
else
value &= ~BIT(BF_SRC_CFGX_SAMPLE_CH_MODE);
writel(value, aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
if (aio->port_type == PORT_SPDIF) {
dev_err(aio->cygaud->dev,
"SPDIF does not support 8bit format\n");
return -EINVAL;
}
bitres = 8;
break;
case SNDRV_PCM_FORMAT_S16_LE:
bitres = 16;
break;
case SNDRV_PCM_FORMAT_S32_LE:
/* 32 bit mode is coded as 0 */
bitres = 0;
break;
default:
return -EINVAL;
}
value = readl(aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
value &= ~(mask << BF_SRC_CFGX_BIT_RES);
value |= (bitres << BF_SRC_CFGX_BIT_RES);
writel(value, aio->cygaud->audio + aio->regs.bf_sourcech_cfg);
} else {
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
value = readl(aio->cygaud->audio +
aio->regs.bf_destch_cfg);
value |= BIT(BF_DST_CFGX_CAP_MODE);
writel(value, aio->cygaud->audio +
aio->regs.bf_destch_cfg);
break;
case SNDRV_PCM_FORMAT_S32_LE:
value = readl(aio->cygaud->audio +
aio->regs.bf_destch_cfg);
value &= ~BIT(BF_DST_CFGX_CAP_MODE);
writel(value, aio->cygaud->audio +
aio->regs.bf_destch_cfg);
break;
default:
return -EINVAL;
}
}
aio->lrclk = rate;
if (!aio->is_slave)
ret = cygnus_ssp_set_clocks(aio, cygaud);
return ret;
}
/*
* This function sets the mclk frequency for pll clock
*/
static int cygnus_ssp_set_sysclk(struct snd_soc_dai *dai,
int clk_id, unsigned int freq, int dir)
{
int sel;
u32 value;
struct cygnus_aio_port *aio = cygnus_dai_get_portinfo(dai);
struct cygnus_audio *cygaud = snd_soc_dai_get_drvdata(dai);
dev_dbg(aio->cygaud->dev,
"%s Enter port = %d\n", __func__, aio->portnum);
sel = pll_configure_mclk(cygaud, freq, aio);
if (sel < 0) {
dev_err(aio->cygaud->dev,
"%s Setting mclk failed.\n", __func__);
return -EINVAL;
}
aio->mclk = freq;
dev_dbg(aio->cygaud->dev, "%s Setting MCLKSEL to %d\n", __func__, sel);
value = readl(aio->cygaud->audio + aio->regs.i2s_mclk_cfg);
value &= ~(0xf << I2S_OUT_PLLCLKSEL_SHIFT);
value |= (sel << I2S_OUT_PLLCLKSEL_SHIFT);
writel(value, aio->cygaud->audio + aio->regs.i2s_mclk_cfg);
return 0;
}
static int cygnus_ssp_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct cygnus_aio_port *aio = cygnus_dai_get_portinfo(dai);
snd_soc_dai_set_dma_data(dai, substream, aio);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
aio->clk_trace.play_en = true;
else
aio->clk_trace.cap_en = true;
return 0;
}
static void cygnus_ssp_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct cygnus_aio_port *aio = cygnus_dai_get_portinfo(dai);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
aio->clk_trace.play_en = false;
else
aio->clk_trace.cap_en = false;
if (!aio->is_slave) {
u32 val;
val = readl(aio->cygaud->audio + aio->regs.i2s_mclk_cfg);
val &= CYGNUS_PLLCLKSEL_MASK;
if (val >= ARRAY_SIZE(aio->cygaud->audio_clk)) {
dev_err(aio->cygaud->dev, "Clk index %u is out of bounds\n",
val);
return;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (aio->clk_trace.play_clk_en) {
clk_disable_unprepare(aio->cygaud->
audio_clk[val]);
aio->clk_trace.play_clk_en = false;
}
} else {
if (aio->clk_trace.cap_clk_en) {
clk_disable_unprepare(aio->cygaud->
audio_clk[val]);
aio->clk_trace.cap_clk_en = false;
}
}
}
}
/*
* Bit Update Notes
* 31 Yes TDM Mode (1 = TDM, 0 = i2s)
* 30 Yes Slave Mode (1 = Slave, 0 = Master)
* 29:26 No Sclks per frame
* 25:18 Yes FS Width
* 17:14 No Valid Slots
* 13 No Bits (1 = 16 bits, 0 = 32 bits)
* 12:08 No Bits per samp
* 07 Yes Justifcation (1 = LSB, 0 = MSB)
* 06 Yes Alignment (1 = Delay 1 clk, 0 = no delay
* 05 Yes SCLK polarity (1 = Rising, 0 = Falling)
* 04 Yes LRCLK Polarity (1 = High for left, 0 = Low for left)
* 03:02 Yes Reserved - write as zero
* 01 No Data Enable
* 00 No CLK Enable
*/
#define I2S_OUT_CFG_REG_UPDATE_MASK 0x3C03FF03
/* Input cfg is same as output, but the FS width is not a valid field */
#define I2S_IN_CFG_REG_UPDATE_MASK (I2S_OUT_CFG_REG_UPDATE_MASK | 0x03FC0000)
int cygnus_ssp_set_custom_fsync_width(struct snd_soc_dai *cpu_dai, int len)
{
struct cygnus_aio_port *aio = cygnus_dai_get_portinfo(cpu_dai);
if ((len > 0) && (len < 256)) {
aio->fsync_width = len;
return 0;
} else {
return -EINVAL;
}
}
static int cygnus_ssp_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
{
struct cygnus_aio_port *aio = cygnus_dai_get_portinfo(cpu_dai);
u32 ssp_curcfg;
u32 ssp_newcfg;
u32 ssp_outcfg;
u32 ssp_incfg;
u32 val;
u32 mask;
dev_dbg(aio->cygaud->dev, "%s Enter fmt: %x\n", __func__, fmt);
if (aio->port_type == PORT_SPDIF)
return -EINVAL;
ssp_newcfg = 0;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
ssp_newcfg |= BIT(I2S_OUT_CFGX_SLAVE_MODE);
aio->is_slave = 1;
break;
case SND_SOC_DAIFMT_CBS_CFS:
ssp_newcfg &= ~BIT(I2S_OUT_CFGX_SLAVE_MODE);
aio->is_slave = 0;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
ssp_newcfg |= BIT(I2S_OUT_CFGX_DATA_ALIGNMENT);
ssp_newcfg |= BIT(I2S_OUT_CFGX_FSYNC_WIDTH);
aio->mode = CYGNUS_SSPMODE_I2S;
break;
case SND_SOC_DAIFMT_DSP_A:
case SND_SOC_DAIFMT_DSP_B:
ssp_newcfg |= BIT(I2S_OUT_CFGX_TDM_MODE);
/* DSP_A = data after FS, DSP_B = data during FS */
if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_DSP_A)
ssp_newcfg |= BIT(I2S_OUT_CFGX_DATA_ALIGNMENT);
if ((aio->fsync_width > 0) && (aio->fsync_width < 256))
ssp_newcfg |=
(aio->fsync_width << I2S_OUT_CFGX_FSYNC_WIDTH);
else
ssp_newcfg |= BIT(I2S_OUT_CFGX_FSYNC_WIDTH);
aio->mode = CYGNUS_SSPMODE_TDM;
break;
default:
return -EINVAL;
}
/*
* SSP out cfg.
* Retain bits we do not want to update, then OR in new bits
*/
ssp_curcfg = readl(aio->cygaud->audio + aio->regs.i2s_cfg);
ssp_outcfg = (ssp_curcfg & I2S_OUT_CFG_REG_UPDATE_MASK) | ssp_newcfg;
writel(ssp_outcfg, aio->cygaud->audio + aio->regs.i2s_cfg);
/*
* SSP in cfg.
* Retain bits we do not want to update, then OR in new bits
*/
ssp_curcfg = readl(aio->cygaud->i2s_in + aio->regs.i2s_cap_cfg);
ssp_incfg = (ssp_curcfg & I2S_IN_CFG_REG_UPDATE_MASK) | ssp_newcfg;
writel(ssp_incfg, aio->cygaud->i2s_in + aio->regs.i2s_cap_cfg);
val = readl(aio->cygaud->audio + AUD_MISC_SEROUT_OE_REG_BASE);
/*
* Configure the word clk and bit clk as output or tristate
* Each port has 4 bits for controlling its pins.
* Shift the mask based upon port number.
*/
mask = BIT(AUD_MISC_SEROUT_LRCK_OE)
| BIT(AUD_MISC_SEROUT_SCLK_OE)
| BIT(AUD_MISC_SEROUT_MCLK_OE);
mask = mask << (aio->portnum * 4);
if (aio->is_slave)
/* Set bit for tri-state */
val |= mask;
else
/* Clear bit for drive */
val &= ~mask;
dev_dbg(aio->cygaud->dev, "%s Set OE bits 0x%x\n", __func__, val);
writel(val, aio->cygaud->audio + AUD_MISC_SEROUT_OE_REG_BASE);
return 0;
}
static int cygnus_ssp_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct cygnus_aio_port *aio = cygnus_dai_get_portinfo(dai);
struct cygnus_audio *cygaud = snd_soc_dai_get_drvdata(dai);
dev_dbg(aio->cygaud->dev,
"%s cmd %d at port = %d\n", __func__, cmd, aio->portnum);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
audio_ssp_out_enable(aio);
else
audio_ssp_in_enable(aio);
cygaud->active_ports++;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
audio_ssp_out_disable(aio);
else
audio_ssp_in_disable(aio);
cygaud->active_ports--;
break;
default:
return -EINVAL;
}
return 0;
}
static int cygnus_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
{
struct cygnus_aio_port *aio = cygnus_dai_get_portinfo(cpu_dai);
u32 value;
int bits_per_slot = 0; /* default to 32-bits per slot */
int frame_bits;
unsigned int active_slots;
bool found = false;
int i;
if (tx_mask != rx_mask) {
dev_err(aio->cygaud->dev,
"%s tx_mask must equal rx_mask\n", __func__);
return -EINVAL;
}
active_slots = hweight32(tx_mask);
if ((active_slots < 0) || (active_slots > 16))
return -EINVAL;
/* Slot value must be even */
if (active_slots % 2)
return -EINVAL;
/* We encode 16 slots as 0 in the reg */
if (active_slots == 16)
active_slots = 0;
/* Slot Width is either 16 or 32 */
switch (slot_width) {
case 16:
bits_per_slot = 1;
break;
case 32:
bits_per_slot = 0;
break;
default:
bits_per_slot = 0;
dev_warn(aio->cygaud->dev,
"%s Defaulting Slot Width to 32\n", __func__);
}
frame_bits = slots * slot_width;
for (i = 0; i < ARRAY_SIZE(ssp_valid_tdm_framesize); i++) {
if (ssp_valid_tdm_framesize[i] == frame_bits) {
found = true;
break;
}
}
if (!found) {
dev_err(aio->cygaud->dev,
"%s In TDM mode, frame bits INVALID (%d)\n",
__func__, frame_bits);
return -EINVAL;
}
aio->bit_per_frame = frame_bits;
dev_dbg(aio->cygaud->dev, "%s active_slots %u, bits per frame %d\n",
__func__, active_slots, frame_bits);
/* Set capture side of ssp port */
value = readl(aio->cygaud->i2s_in + aio->regs.i2s_cap_cfg);
value &= ~(0xf << I2S_OUT_CFGX_VALID_SLOT);
value |= (active_slots << I2S_OUT_CFGX_VALID_SLOT);
value &= ~BIT(I2S_OUT_CFGX_BITS_PER_SLOT);
value |= (bits_per_slot << I2S_OUT_CFGX_BITS_PER_SLOT);
writel(value, aio->cygaud->i2s_in + aio->regs.i2s_cap_cfg);
/* Set playback side of ssp port */
value = readl(aio->cygaud->audio + aio->regs.i2s_cfg);
value &= ~(0xf << I2S_OUT_CFGX_VALID_SLOT);
value |= (active_slots << I2S_OUT_CFGX_VALID_SLOT);
value &= ~BIT(I2S_OUT_CFGX_BITS_PER_SLOT);
value |= (bits_per_slot << I2S_OUT_CFGX_BITS_PER_SLOT);
writel(value, aio->cygaud->audio + aio->regs.i2s_cfg);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int cygnus_ssp_suspend(struct snd_soc_dai *cpu_dai)
{
struct cygnus_aio_port *aio = cygnus_dai_get_portinfo(cpu_dai);
if (!aio->is_slave) {
u32 val;
val = readl(aio->cygaud->audio + aio->regs.i2s_mclk_cfg);
val &= CYGNUS_PLLCLKSEL_MASK;
if (val >= ARRAY_SIZE(aio->cygaud->audio_clk)) {
dev_err(aio->cygaud->dev, "Clk index %u is out of bounds\n",
val);
return -EINVAL;
}
if (aio->clk_trace.cap_clk_en)
clk_disable_unprepare(aio->cygaud->audio_clk[val]);
if (aio->clk_trace.play_clk_en)
clk_disable_unprepare(aio->cygaud->audio_clk[val]);
aio->pll_clk_num = val;
}
return 0;
}
static int cygnus_ssp_resume(struct snd_soc_dai *cpu_dai)
{
struct cygnus_aio_port *aio = cygnus_dai_get_portinfo(cpu_dai);
int error;
if (!aio->is_slave) {
if (aio->clk_trace.cap_clk_en) {
error = clk_prepare_enable(aio->cygaud->
audio_clk[aio->pll_clk_num]);
if (error) {
dev_err(aio->cygaud->dev, "%s clk_prepare_enable failed\n",
__func__);
return -EINVAL;
}
}
if (aio->clk_trace.play_clk_en) {
error = clk_prepare_enable(aio->cygaud->
audio_clk[aio->pll_clk_num]);
if (error) {
if (aio->clk_trace.cap_clk_en)
clk_disable_unprepare(aio->cygaud->
audio_clk[aio->pll_clk_num]);
dev_err(aio->cygaud->dev, "%s clk_prepare_enable failed\n",
__func__);
return -EINVAL;
}
}
}
return 0;
}
#else
#define cygnus_ssp_suspend NULL
#define cygnus_ssp_resume NULL
#endif
static const struct snd_soc_dai_ops cygnus_ssp_dai_ops = {
.startup = cygnus_ssp_startup,
.shutdown = cygnus_ssp_shutdown,
.trigger = cygnus_ssp_trigger,
.hw_params = cygnus_ssp_hw_params,
.set_fmt = cygnus_ssp_set_fmt,
.set_sysclk = cygnus_ssp_set_sysclk,
.set_tdm_slot = cygnus_set_dai_tdm_slot,
};
#define INIT_CPU_DAI(num) { \
.name = "cygnus-ssp" #num, \
.playback = { \
.channels_min = 1, \
.channels_max = 16, \
.rates = CYGNUS_TDM_RATE | SNDRV_PCM_RATE_88200 | \
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
SNDRV_PCM_RATE_192000, \
.formats = SNDRV_PCM_FMTBIT_S8 | \
SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S32_LE, \
}, \
.capture = { \
.channels_min = 2, \
.channels_max = 16, \
.rates = CYGNUS_TDM_RATE | SNDRV_PCM_RATE_88200 | \
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
SNDRV_PCM_RATE_192000, \
.formats = SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S32_LE, \
}, \
.ops = &cygnus_ssp_dai_ops, \
.suspend = cygnus_ssp_suspend, \
.resume = cygnus_ssp_resume, \
}
static const struct snd_soc_dai_driver cygnus_ssp_dai_info[] = {
INIT_CPU_DAI(0),
INIT_CPU_DAI(1),
INIT_CPU_DAI(2),
};
static struct snd_soc_dai_driver cygnus_spdif_dai_info = {
.name = "cygnus-spdif",
.playback = {
.channels_min = 2,
.channels_max = 2,
.rates = CYGNUS_TDM_RATE | SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
SNDRV_PCM_RATE_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
},
.ops = &cygnus_ssp_dai_ops,
.suspend = cygnus_ssp_suspend,
.resume = cygnus_ssp_resume,
};
static struct snd_soc_dai_driver cygnus_ssp_dai[CYGNUS_MAX_PORTS];
static const struct snd_soc_component_driver cygnus_ssp_component = {
.name = "cygnus-audio",
};
/*
* Return < 0 if error
* Return 0 if disabled
* Return 1 if enabled and node is parsed successfully
*/
static int parse_ssp_child_node(struct platform_device *pdev,
struct device_node *dn,
struct cygnus_audio *cygaud,
struct snd_soc_dai_driver *p_dai)
{
struct cygnus_aio_port *aio;
struct cygnus_ssp_regs ssp_regs[3];
u32 rawval;
int portnum = -1;
enum cygnus_audio_port_type port_type;
if (of_property_read_u32(dn, "reg", &rawval)) {
dev_err(&pdev->dev, "Missing reg property\n");
return -EINVAL;
}
portnum = rawval;
switch (rawval) {
case 0:
ssp_regs[0] = INIT_SSP_REGS(0);
port_type = PORT_TDM;
break;
case 1:
ssp_regs[1] = INIT_SSP_REGS(1);
port_type = PORT_TDM;
break;
case 2:
ssp_regs[2] = INIT_SSP_REGS(2);
port_type = PORT_TDM;
break;
case 3:
port_type = PORT_SPDIF;
break;
default:
dev_err(&pdev->dev, "Bad value for reg %u\n", rawval);
return -EINVAL;
}
aio = &cygaud->portinfo[portnum];
aio->cygaud = cygaud;
aio->portnum = portnum;
aio->port_type = port_type;
aio->fsync_width = -1;
switch (port_type) {
case PORT_TDM:
aio->regs = ssp_regs[portnum];
*p_dai = cygnus_ssp_dai_info[portnum];
aio->mode = CYGNUS_SSPMODE_UNKNOWN;
break;
case PORT_SPDIF:
aio->regs.bf_sourcech_cfg = BF_SRC_CFG3_OFFSET;
aio->regs.bf_sourcech_ctrl = BF_SRC_CTRL3_OFFSET;
aio->regs.i2s_mclk_cfg = SPDIF_MCLK_CFG_OFFSET;
aio->regs.i2s_stream_cfg = SPDIF_STREAM_CFG_OFFSET;
*p_dai = cygnus_spdif_dai_info;
/* For the purposes of this code SPDIF can be I2S mode */
aio->mode = CYGNUS_SSPMODE_I2S;
break;
default:
dev_err(&pdev->dev, "Bad value for port_type %d\n", port_type);
return -EINVAL;
}
dev_dbg(&pdev->dev, "%s portnum = %d\n", __func__, aio->portnum);
aio->streams_on = 0;
aio->cygaud->dev = &pdev->dev;
aio->clk_trace.play_en = false;
aio->clk_trace.cap_en = false;
audio_ssp_init_portregs(aio);
return 0;
}
static int audio_clk_init(struct platform_device *pdev,
struct cygnus_audio *cygaud)
{
int i;
char clk_name[PROP_LEN_MAX];
for (i = 0; i < ARRAY_SIZE(cygaud->audio_clk); i++) {
snprintf(clk_name, PROP_LEN_MAX, "ch%d_audio", i);
cygaud->audio_clk[i] = devm_clk_get(&pdev->dev, clk_name);
if (IS_ERR(cygaud->audio_clk[i]))
return PTR_ERR(cygaud->audio_clk[i]);
}
return 0;
}
static int cygnus_ssp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *child_node;
struct resource *res = pdev->resource;
struct cygnus_audio *cygaud;
int err = -EINVAL;
int node_count;
int active_port_count;
cygaud = devm_kzalloc(dev, sizeof(struct cygnus_audio), GFP_KERNEL);
if (!cygaud)
return -ENOMEM;
dev_set_drvdata(dev, cygaud);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aud");
cygaud->audio = devm_ioremap_resource(dev, res);
if (IS_ERR(cygaud->audio))
return PTR_ERR(cygaud->audio);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "i2s_in");
cygaud->i2s_in = devm_ioremap_resource(dev, res);
if (IS_ERR(cygaud->i2s_in))
return PTR_ERR(cygaud->i2s_in);
/* Tri-state all controlable pins until we know that we need them */
writel(CYGNUS_SSP_TRISTATE_MASK,
cygaud->audio + AUD_MISC_SEROUT_OE_REG_BASE);
node_count = of_get_child_count(pdev->dev.of_node);
if ((node_count < 1) || (node_count > CYGNUS_MAX_PORTS)) {
dev_err(dev, "child nodes is %d. Must be between 1 and %d\n",
node_count, CYGNUS_MAX_PORTS);
return -EINVAL;
}
active_port_count = 0;
for_each_available_child_of_node(pdev->dev.of_node, child_node) {
err = parse_ssp_child_node(pdev, child_node, cygaud,
&cygnus_ssp_dai[active_port_count]);
/* negative is err, 0 is active and good, 1 is disabled */
if (err < 0)
return err;
else if (!err) {
dev_dbg(dev, "Activating DAI: %s\n",
cygnus_ssp_dai[active_port_count].name);
active_port_count++;
}
}
cygaud->dev = dev;
cygaud->active_ports = 0;
dev_dbg(dev, "Registering %d DAIs\n", active_port_count);
err = snd_soc_register_component(dev, &cygnus_ssp_component,
cygnus_ssp_dai, active_port_count);
if (err) {
dev_err(dev, "snd_soc_register_dai failed\n");
return err;
}
cygaud->irq_num = platform_get_irq(pdev, 0);
if (cygaud->irq_num <= 0) {
dev_err(dev, "platform_get_irq failed\n");
err = cygaud->irq_num;
goto err_irq;
}
err = audio_clk_init(pdev, cygaud);
if (err) {
dev_err(dev, "audio clock initialization failed\n");
goto err_irq;
}
err = cygnus_soc_platform_register(dev, cygaud);
if (err) {
dev_err(dev, "platform reg error %d\n", err);
goto err_irq;
}
return 0;
err_irq:
snd_soc_unregister_component(dev);
return err;
}
static int cygnus_ssp_remove(struct platform_device *pdev)
{
cygnus_soc_platform_unregister(&pdev->dev);
snd_soc_unregister_component(&pdev->dev);
return 0;
}
static const struct of_device_id cygnus_ssp_of_match[] = {
{ .compatible = "brcm,cygnus-audio" },
{},
};
MODULE_DEVICE_TABLE(of, cygnus_ssp_of_match);
static struct platform_driver cygnus_ssp_driver = {
.probe = cygnus_ssp_probe,
.remove = cygnus_ssp_remove,
.driver = {
.name = "cygnus-ssp",
.of_match_table = cygnus_ssp_of_match,
},
};
module_platform_driver(cygnus_ssp_driver);
MODULE_ALIAS("platform:cygnus-ssp");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Broadcom");
MODULE_DESCRIPTION("Cygnus ASoC SSP Interface");
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