| Simon Glass | d1c1377 | 2015-09-01 19:19:37 -0600 | [diff] [blame] | 1 | /* |
| 2 | * SPI driver for rockchip |
| 3 | * |
| 4 | * (C) Copyright 2015 Google, Inc |
| 5 | * |
| 6 | * (C) Copyright 2008-2013 Rockchip Electronics |
| 7 | * Peter, Software Engineering, <superpeter.cai@gmail.com>. |
| 8 | * |
| 9 | * SPDX-License-Identifier: GPL-2.0+ |
| 10 | */ |
| 11 | |
| 12 | #ifndef __RK_SPI_H |
| 13 | #define __RK_SPI_H |
| 14 | |
| 15 | struct rockchip_spi { |
| 16 | u32 ctrlr0; |
| 17 | u32 ctrlr1; |
| 18 | u32 enr; |
| 19 | u32 ser; |
| 20 | u32 baudr; |
| 21 | u32 txftlr; |
| 22 | u32 rxftlr; |
| 23 | u32 txflr; |
| 24 | u32 rxflr; |
| 25 | u32 sr; |
| 26 | u32 ipr; |
| 27 | u32 imr; |
| 28 | u32 isr; |
| 29 | u32 risr; |
| 30 | u32 icr; |
| 31 | u32 dmacr; |
| 32 | u32 dmatdlr; |
| 33 | u32 dmardlr; /* 0x44 */ |
| 34 | u32 reserved[0xef]; |
| 35 | u32 txdr[0x100]; /* 0x400 */ |
| 36 | u32 rxdr[0x100]; /* 0x800 */ |
| 37 | }; |
| 38 | |
| 39 | /* CTRLR0 */ |
| 40 | enum { |
| 41 | DFS_SHIFT = 0, /* Data Frame Size */ |
| 42 | DFS_MASK = 3, |
| 43 | DFS_4BIT = 0, |
| 44 | DFS_8BIT, |
| 45 | DFS_16BIT, |
| 46 | DFS_RESV, |
| 47 | |
| 48 | CFS_SHIFT = 2, /* Control Frame Size */ |
| 49 | CFS_MASK = 0xf, |
| 50 | |
| 51 | SCPH_SHIFT = 6, /* Serial Clock Phase */ |
| 52 | SCPH_MASK = 1, |
| 53 | SCPH_TOGMID = 0, /* SCLK toggles in middle of first data bit */ |
| 54 | SCPH_TOGSTA, /* SCLK toggles at start of first data bit */ |
| 55 | |
| 56 | SCOL_SHIFT = 7, /* Serial Clock Polarity */ |
| 57 | SCOL_MASK = 1, |
| 58 | SCOL_LOW = 0, /* Inactive state of serial clock is low */ |
| 59 | SCOL_HIGH, /* Inactive state of serial clock is high */ |
| 60 | |
| 61 | CSM_SHIFT = 8, /* Chip Select Mode */ |
| 62 | CSM_MASK = 0x3, |
| 63 | CSM_KEEP = 0, /* ss_n stays low after each frame */ |
| 64 | CSM_HALF, /* ss_n high for half sclk_out cycles */ |
| 65 | CSM_ONE, /* ss_n high for one sclk_out cycle */ |
| 66 | CSM_RESV, |
| 67 | |
| 68 | SSN_DELAY_SHIFT = 10, /* SSN to Sclk_out delay */ |
| 69 | SSN_DELAY_MASK = 1, |
| 70 | SSN_DELAY_HALF = 0, /* 1/2 sclk_out cycle */ |
| 71 | SSN_DELAY_ONE = 1, /* 1 sclk_out cycle */ |
| 72 | |
| 73 | SEM_SHIFT = 11, /* Serial Endian Mode */ |
| 74 | SEM_MASK = 1, |
| 75 | SEM_LITTLE = 0, /* little endian */ |
| 76 | SEM_BIG, /* big endian */ |
| 77 | |
| 78 | FBM_SHIFT = 12, /* First Bit Mode */ |
| 79 | FBM_MASK = 1, |
| 80 | FBM_MSB = 0, /* first bit is MSB */ |
| 81 | FBM_LSB, /* first bit in LSB */ |
| 82 | |
| 83 | HALF_WORD_TX_SHIFT = 13, /* Byte and Halfword Transform */ |
| 84 | HALF_WORD_MASK = 1, |
| 85 | HALF_WORD_ON = 0, /* apb 16bit write/read, spi 8bit write/read */ |
| 86 | HALF_WORD_OFF, /* apb 8bit write/read, spi 8bit write/read */ |
| 87 | |
| 88 | RXDSD_SHIFT = 14, /* Rxd Sample Delay, in cycles */ |
| 89 | RXDSD_MASK = 3, |
| 90 | |
| 91 | FRF_SHIFT = 16, /* Frame Format */ |
| 92 | FRF_MASK = 3, |
| 93 | FRF_SPI = 0, /* Motorola SPI */ |
| 94 | FRF_SSP, /* Texas Instruments SSP*/ |
| 95 | FRF_MICROWIRE, /* National Semiconductors Microwire */ |
| 96 | FRF_RESV, |
| 97 | |
| 98 | TMOD_SHIFT = 18, /* Transfer Mode */ |
| 99 | TMOD_MASK = 3, |
| 100 | TMOD_TR = 0, /* xmit & recv */ |
| 101 | TMOD_TO, /* xmit only */ |
| 102 | TMOD_RO, /* recv only */ |
| 103 | TMOD_RESV, |
| 104 | |
| 105 | OMOD_SHIFT = 20, /* Operation Mode */ |
| 106 | OMOD_MASK = 1, |
| 107 | OMOD_MASTER = 0, /* Master Mode */ |
| 108 | OMOD_SLAVE, /* Slave Mode */ |
| 109 | }; |
| 110 | |
| 111 | /* SR */ |
| 112 | enum { |
| 113 | SR_MASK = 0x7f, |
| 114 | SR_BUSY = 1 << 0, |
| 115 | SR_TF_FULL = 1 << 1, |
| 116 | SR_TF_EMPT = 1 << 2, |
| 117 | SR_RF_EMPT = 1 << 3, |
| 118 | SR_RF_FULL = 1 << 4, |
| 119 | }; |
| 120 | |
| 121 | #define ROCKCHIP_SPI_TIMEOUT_MS 1000 |
| 122 | #define ROCKCHIP_SPI_MAX_RATE 48000000 |
| 123 | |
| 124 | #endif /* __RK_SPI_H */ |