mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-27 15:12:21 +00:00
511ed5fdd3
This patch adds driver for I2S interface specific to samsung. Signed-off-by: R. Chandrasekar <rcsekar@samsung.com> Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
127 lines
4.1 KiB
C
127 lines
4.1 KiB
C
/*
|
|
* Copyright (C) 2012 Samsung Electronics
|
|
* R. Chandrasekar <rcsekar@samsung.com>
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef __I2S_H__
|
|
#define __I2S_H__
|
|
|
|
/*
|
|
* DAI hardware audio formats.
|
|
*
|
|
* Describes the physical PCM data formating and clocking. Add new formats
|
|
* to the end.
|
|
*/
|
|
#define SND_SOC_DAIFMT_I2S 1 /* I2S mode */
|
|
#define SND_SOC_DAIFMT_RIGHT_J 2 /* Right Justified mode */
|
|
#define SND_SOC_DAIFMT_LEFT_J 3 /* Left Justified mode */
|
|
#define SND_SOC_DAIFMT_DSP_A 4 /* L data MSB after FRM LRC */
|
|
#define SND_SOC_DAIFMT_DSP_B 5 /* L data MSB during FRM LRC */
|
|
#define SND_SOC_DAIFMT_AC97 6 /* AC97 */
|
|
#define SND_SOC_DAIFMT_PDM 7 /* Pulse density modulation */
|
|
|
|
/* left and right justified also known as MSB and LSB respectively */
|
|
#define SND_SOC_DAIFMT_MSB SND_SOC_DAIFMT_LEFT_J
|
|
#define SND_SOC_DAIFMT_LSB SND_SOC_DAIFMT_RIGHT_J
|
|
|
|
/*
|
|
* DAI hardware signal inversions.
|
|
*
|
|
* Specifies whether the DAI can also support inverted clocks for the specified
|
|
* format.
|
|
*/
|
|
#define SND_SOC_DAIFMT_NB_NF (1 << 8) /* normal bit clock + frame */
|
|
#define SND_SOC_DAIFMT_NB_IF (2 << 8) /* normal BCLK + inv FRM */
|
|
#define SND_SOC_DAIFMT_IB_NF (3 << 8) /* invert BCLK + nor FRM */
|
|
#define SND_SOC_DAIFMT_IB_IF (4 << 8) /* invert BCLK + FRM */
|
|
|
|
/*
|
|
* DAI hardware clock masters.
|
|
*
|
|
* This is wrt the codec, the inverse is true for the interface
|
|
* i.e. if the codec is clk and FRM master then the interface is
|
|
* clk and frame slave.
|
|
*/
|
|
#define SND_SOC_DAIFMT_CBM_CFM (1 << 12) /* codec clk & FRM master */
|
|
#define SND_SOC_DAIFMT_CBS_CFM (2 << 12) /* codec clk slave & FRM master */
|
|
#define SND_SOC_DAIFMT_CBM_CFS (3 << 12) /* codec clk master & frame slave */
|
|
#define SND_SOC_DAIFMT_CBS_CFS (4 << 12) /* codec clk & FRM slave */
|
|
|
|
#define SND_SOC_DAIFMT_FORMAT_MASK 0x000f
|
|
#define SND_SOC_DAIFMT_CLOCK_MASK 0x00f0
|
|
#define SND_SOC_DAIFMT_INV_MASK 0x0f00
|
|
#define SND_SOC_DAIFMT_MASTER_MASK 0xf000
|
|
|
|
/*
|
|
* Master Clock Directions
|
|
*/
|
|
#define SND_SOC_CLOCK_IN 0
|
|
#define SND_SOC_CLOCK_OUT 1
|
|
|
|
/* I2S Tx Control */
|
|
#define I2S_TX_ON 1
|
|
#define I2S_TX_OFF 0
|
|
|
|
#define FIFO_LENGTH 64
|
|
|
|
/* I2s Registers */
|
|
struct i2s_reg {
|
|
unsigned int con; /* base + 0 , Control register */
|
|
unsigned int mod; /* Mode register */
|
|
unsigned int fic; /* FIFO control register */
|
|
unsigned int psr; /* Reserved */
|
|
unsigned int txd; /* Transmit data register */
|
|
unsigned int rxd; /* Receive Data Register */
|
|
};
|
|
|
|
/* This structure stores the i2s related information */
|
|
struct i2stx_info {
|
|
unsigned int rfs; /* LR clock frame size */
|
|
unsigned int bfs; /* Bit slock frame size */
|
|
unsigned int audio_pll_clk; /* Audio pll frequency in Hz */
|
|
unsigned int samplingrate; /* sampling rate */
|
|
unsigned int bitspersample; /* bits per sample */
|
|
unsigned int channels; /* audio channels */
|
|
unsigned int base_address; /* I2S Register Base */
|
|
};
|
|
|
|
/*
|
|
* Sends the given data through i2s tx
|
|
*
|
|
* @param pi2s_tx pointer of i2s transmitter parameter structure.
|
|
* @param data address of the data buffer
|
|
* @param data_size array size of the int buffer (total size / size of int)
|
|
*
|
|
* @return int value 0 for success, -1 in case of error
|
|
*/
|
|
int i2s_transfer_tx_data(struct i2stx_info *pi2s_tx, unsigned *data,
|
|
unsigned long data_size);
|
|
|
|
/*
|
|
* Initialise i2s transmiter
|
|
*
|
|
* @param pi2s_tx pointer of i2s transmitter parameter structure.
|
|
*
|
|
* @return int value 0 for success, -1 in case of error
|
|
*/
|
|
int i2s_tx_init(struct i2stx_info *pi2s_tx);
|
|
|
|
#endif /* __I2S_H__ */
|