Current File : //usr/src/kernels/3.10.0-957.21.3.el7.centos.plus.x86_64/include/linux/platform_data/davinci_asp.h
/*
* TI DaVinci Audio Serial Port support
*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
*
* 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.
*/
#ifndef __DAVINCI_ASP_H
#define __DAVINCI_ASP_H
#include <linux/genalloc.h>
struct snd_platform_data {
u32 tx_dma_offset;
u32 rx_dma_offset;
int asp_chan_q; /* event queue number for ASP channel */
int ram_chan_q; /* event queue number for RAM channel */
/*
* Allowing this is more efficient and eliminates left and right swaps
* caused by underruns, but will swap the left and right channels
* when compared to previous behavior.
*/
unsigned enable_channel_combine:1;
unsigned sram_size_playback;
unsigned sram_size_capture;
struct gen_pool *sram_pool;
/*
* If McBSP peripheral gets the clock from an external pin,
* there are three chooses, that are MCBSP_CLKX, MCBSP_CLKR
* and MCBSP_CLKS.
* Depending on different hardware connections it is possible
* to use this setting to change the behaviour of McBSP
* driver.
*/
int clk_input_pin;
/*
* This flag works when both clock and FS are outputs for the cpu
* and makes clock more accurate (FS is not symmetrical and the
* clock is very fast.
* The clock becoming faster is named
* i2s continuous serial clock (I2S_SCK) and it is an externally
* visible bit clock.
*
* first line : WordSelect
* second line : ContinuousSerialClock
* third line: SerialData
*
* SYMMETRICAL APPROACH:
* _______________________ LEFT
* _| RIGHT |______________________|
* _ _ _ _ _ _ _ _
* _| |_| |_ x16 _| |_| |_| |_| |_ x16 _| |_| |_
* _ _ _ _ _ _ _ _
* _/ \_/ \_ ... _/ \_/ \_/ \_/ \_ ... _/ \_/ \_
* \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/
*
* ACCURATE CLOCK APPROACH:
* ______________ LEFT
* _| RIGHT |_______________________________|
* _ _ _ _ _ _ _ _ _
* _| |_ x16 _| |_| |_ x16 _| |_| |_| |_| |_| |_| |
* _ _ _ _ dummy cycles
* _/ \_ ... _/ \_/ \_ ... _/ \__________________
* \_/ \_/ \_/ \_/
*
*/
bool i2s_accurate_sck;
/* McASP specific fields */
int tdm_slots;
u8 op_mode;
u8 num_serializer;
u8 *serial_dir;
u8 version;
u8 txnumevt;
u8 rxnumevt;
};
enum {
MCASP_VERSION_1 = 0, /* DM646x */
MCASP_VERSION_2, /* DA8xx/OMAPL1x */
MCASP_VERSION_3, /* TI81xx/AM33xx */
};
enum mcbsp_clk_input_pin {
MCBSP_CLKR = 0, /* as in DM365 */
MCBSP_CLKS,
};
#define INACTIVE_MODE 0
#define TX_MODE 1
#define RX_MODE 2
#define DAVINCI_MCASP_IIS_MODE 0
#define DAVINCI_MCASP_DIT_MODE 1
#endif
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