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| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
|---|---|
| 2 | /* |
| 3 | * TI DaVinci Audio Serial Port support |
| 4 | * |
| 5 | * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/ |
| 6 | */ |
| 7 | |
| 8 | #ifndef __DAVINCI_ASP_H |
| 9 | #define __DAVINCI_ASP_H |
| 10 | |
| 11 | #include <linux/genalloc.h> |
| 12 | |
| 13 | struct davinci_mcasp_pdata { |
| 14 | u32 tx_dma_offset; |
| 15 | u32 rx_dma_offset; |
| 16 | int asp_chan_q; /* event queue number for ASP channel */ |
| 17 | int ram_chan_q; /* event queue number for RAM channel */ |
| 18 | /* |
| 19 | * Allowing this is more efficient and eliminates left and right swaps |
| 20 | * caused by underruns, but will swap the left and right channels |
| 21 | * when compared to previous behavior. |
| 22 | */ |
| 23 | unsigned enable_channel_combine:1; |
| 24 | unsigned sram_size_playback; |
| 25 | unsigned sram_size_capture; |
| 26 | struct gen_pool *sram_pool; |
| 27 | |
| 28 | /* |
| 29 | * If McBSP peripheral gets the clock from an external pin, |
| 30 | * there are three chooses, that are MCBSP_CLKX, MCBSP_CLKR |
| 31 | * and MCBSP_CLKS. |
| 32 | * Depending on different hardware connections it is possible |
| 33 | * to use this setting to change the behaviour of McBSP |
| 34 | * driver. |
| 35 | */ |
| 36 | int clk_input_pin; |
| 37 | |
| 38 | /* |
| 39 | * This flag works when both clock and FS are outputs for the cpu |
| 40 | * and makes clock more accurate (FS is not symmetrical and the |
| 41 | * clock is very fast. |
| 42 | * The clock becoming faster is named |
| 43 | * i2s continuous serial clock (I2S_SCK) and it is an externally |
| 44 | * visible bit clock. |
| 45 | * |
| 46 | * first line : WordSelect |
| 47 | * second line : ContinuousSerialClock |
| 48 | * third line: SerialData |
| 49 | * |
| 50 | * SYMMETRICAL APPROACH: |
| 51 | * _______________________ LEFT |
| 52 | * _| RIGHT |______________________| |
| 53 | * _ _ _ _ _ _ _ _ |
| 54 | * _| |_| |_ x16 _| |_| |_| |_| |_ x16 _| |_| |_ |
| 55 | * _ _ _ _ _ _ _ _ |
| 56 | * _/ \_/ \_ ... _/ \_/ \_/ \_/ \_ ... _/ \_/ \_ |
| 57 | * \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ |
| 58 | * |
| 59 | * ACCURATE CLOCK APPROACH: |
| 60 | * ______________ LEFT |
| 61 | * _| RIGHT |_______________________________| |
| 62 | * _ _ _ _ _ _ _ _ _ |
| 63 | * _| |_ x16 _| |_| |_ x16 _| |_| |_| |_| |_| |_| | |
| 64 | * _ _ _ _ dummy cycles |
| 65 | * _/ \_ ... _/ \_/ \_ ... _/ \__________________ |
| 66 | * \_/ \_/ \_/ \_/ |
| 67 | * |
| 68 | */ |
| 69 | bool i2s_accurate_sck; |
| 70 | |
| 71 | /* McASP specific fields */ |
| 72 | int tdm_slots; |
| 73 | u8 op_mode; |
| 74 | u8 dismod; |
| 75 | u8 num_serializer; |
| 76 | u8 *serial_dir; |
| 77 | u8 version; |
| 78 | u8 txnumevt; |
| 79 | u8 rxnumevt; |
| 80 | int tx_dma_channel; |
| 81 | int rx_dma_channel; |
| 82 | }; |
| 83 | /* TODO: Fix arch/arm/mach-davinci/ users and remove this define */ |
| 84 | #define snd_platform_data davinci_mcasp_pdata |
| 85 | |
| 86 | enum { |
| 87 | MCASP_VERSION_1 = 0, /* DM646x */ |
| 88 | MCASP_VERSION_2, /* DA8xx/OMAPL1x */ |
| 89 | MCASP_VERSION_3, /* TI81xx/AM33xx */ |
| 90 | MCASP_VERSION_4, /* DRA7xxx */ |
| 91 | MCASP_VERSION_OMAP, /* OMAP4/5 */ |
| 92 | }; |
| 93 | |
| 94 | enum mcbsp_clk_input_pin { |
| 95 | MCBSP_CLKR = 0, /* as in DM365 */ |
| 96 | MCBSP_CLKS, |
| 97 | }; |
| 98 | |
| 99 | #define INACTIVE_MODE 0 |
| 100 | #define TX_MODE 1 |
| 101 | #define RX_MODE 2 |
| 102 | |
| 103 | #define DAVINCI_MCASP_IIS_MODE 0 |
| 104 | #define DAVINCI_MCASP_DIT_MODE 1 |
| 105 | |
| 106 | #endif |
| 107 |
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