diff options
Diffstat (limited to 'include/linux/platform_data/davinci_asp.h')
| -rw-r--r-- | include/linux/platform_data/davinci_asp.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/include/linux/platform_data/davinci_asp.h b/include/linux/platform_data/davinci_asp.h new file mode 100644 index 000000000..c8645b2ed --- /dev/null +++ b/include/linux/platform_data/davinci_asp.h @@ -0,0 +1,106 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * TI DaVinci Audio Serial Port support + * + * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/ + */ + +#ifndef __DAVINCI_ASP_H +#define __DAVINCI_ASP_H + +#include <linux/genalloc.h> + +struct davinci_mcasp_pdata { + 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 dismod; + u8 num_serializer; + u8 *serial_dir; + u8 version; + u8 txnumevt; + u8 rxnumevt; + int tx_dma_channel; + int rx_dma_channel; +}; +/* TODO: Fix arch/arm/mach-davinci/ users and remove this define */ +#define snd_platform_data davinci_mcasp_pdata + +enum { + MCASP_VERSION_1 = 0, /* DM646x */ + MCASP_VERSION_2, /* DA8xx/OMAPL1x */ + MCASP_VERSION_3, /* TI81xx/AM33xx */ + MCASP_VERSION_4, /* DRA7xxx */ + MCASP_VERSION_OMAP, /* OMAP4/5 */ +}; + +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 |