Benjamin Gaignard | f32c4c5 | 2014-12-30 15:08:16 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) STMicroelectronics SA 2014 |
| 3 | * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics. |
| 4 | * License terms: GNU General Public License (GPL), version 2 |
| 5 | */ |
| 6 | |
| 7 | #include "sti_awg_utils.h" |
| 8 | |
| 9 | #define AWG_OPCODE_OFFSET 10 |
| 10 | |
| 11 | enum opcode { |
| 12 | SET, |
| 13 | RPTSET, |
| 14 | RPLSET, |
| 15 | SKIP, |
| 16 | STOP, |
| 17 | REPEAT, |
| 18 | REPLAY, |
| 19 | JUMP, |
| 20 | HOLD, |
| 21 | }; |
| 22 | |
| 23 | static int awg_generate_instr(enum opcode opcode, |
| 24 | long int arg, |
| 25 | long int mux_sel, |
| 26 | long int data_en, |
| 27 | struct awg_code_generation_params *fwparams) |
| 28 | { |
| 29 | u32 instruction = 0; |
| 30 | u32 mux = (mux_sel << 8) & 0x1ff; |
| 31 | u32 data_enable = (data_en << 9) & 0x2ff; |
| 32 | long int arg_tmp = arg; |
| 33 | |
| 34 | /* skip, repeat and replay arg should not exceed 1023. |
| 35 | * If user wants to exceed this value, the instruction should be |
| 36 | * duplicate and arg should be adjust for each duplicated instruction. |
| 37 | */ |
| 38 | |
| 39 | while (arg_tmp > 0) { |
| 40 | arg = arg_tmp; |
| 41 | if (fwparams->instruction_offset >= AWG_MAX_INST) { |
| 42 | DRM_ERROR("too many number of instructions\n"); |
| 43 | return -EINVAL; |
| 44 | } |
| 45 | |
| 46 | switch (opcode) { |
| 47 | case SKIP: |
| 48 | /* leave 'arg' + 1 pixel elapsing without changing |
| 49 | * output bus */ |
| 50 | arg--; /* pixel adjustment */ |
| 51 | arg_tmp--; |
| 52 | |
| 53 | if (arg < 0) { |
| 54 | /* SKIP instruction not needed */ |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | if (arg == 0) { |
| 59 | /* SKIP 0 not permitted but we want to skip 1 |
| 60 | * pixel. So we transform SKIP into SET |
| 61 | * instruction */ |
| 62 | opcode = SET; |
Benjamin Gaignard | f32c4c5 | 2014-12-30 15:08:16 +0100 | [diff] [blame] | 63 | break; |
| 64 | } |
| 65 | |
| 66 | mux = 0; |
| 67 | data_enable = 0; |
Benjamin Gaignard | f32c4c5 | 2014-12-30 15:08:16 +0100 | [diff] [blame] | 68 | arg &= (0x3ff); |
| 69 | break; |
| 70 | case REPEAT: |
| 71 | case REPLAY: |
| 72 | if (arg == 0) { |
| 73 | /* REPEAT or REPLAY instruction not needed */ |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | mux = 0; |
| 78 | data_enable = 0; |
Benjamin Gaignard | f32c4c5 | 2014-12-30 15:08:16 +0100 | [diff] [blame] | 79 | arg &= (0x3ff); |
| 80 | break; |
| 81 | case JUMP: |
| 82 | mux = 0; |
| 83 | data_enable = 0; |
| 84 | arg |= 0x40; /* for jump instruction 7th bit is 1 */ |
Benjamin Gaignard | f32c4c5 | 2014-12-30 15:08:16 +0100 | [diff] [blame] | 85 | arg &= 0x3ff; |
| 86 | break; |
| 87 | case STOP: |
| 88 | arg = 0; |
| 89 | break; |
| 90 | case SET: |
| 91 | case RPTSET: |
| 92 | case RPLSET: |
| 93 | case HOLD: |
Benjamin Gaignard | f32c4c5 | 2014-12-30 15:08:16 +0100 | [diff] [blame] | 94 | arg &= (0x0ff); |
| 95 | break; |
| 96 | default: |
| 97 | DRM_ERROR("instruction %d does not exist\n", opcode); |
| 98 | return -EINVAL; |
| 99 | } |
| 100 | |
| 101 | arg_tmp = arg_tmp - arg; |
| 102 | |
| 103 | arg = ((arg + mux) + data_enable); |
| 104 | |
| 105 | instruction = ((opcode) << AWG_OPCODE_OFFSET) | arg; |
| 106 | fwparams->ram_code[fwparams->instruction_offset] = |
| 107 | instruction & (0x3fff); |
| 108 | fwparams->instruction_offset++; |
| 109 | } |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | int sti_awg_generate_code_data_enable_mode( |
| 114 | struct awg_code_generation_params *fwparams, |
| 115 | struct awg_timing *timing) |
| 116 | { |
| 117 | long int val; |
| 118 | long int data_en; |
| 119 | int ret = 0; |
| 120 | |
| 121 | if (timing->trailing_lines > 0) { |
| 122 | /* skip trailing lines */ |
| 123 | val = timing->blanking_level; |
| 124 | data_en = 0; |
| 125 | ret |= awg_generate_instr(RPLSET, val, 0, data_en, fwparams); |
| 126 | |
| 127 | val = timing->trailing_lines - 1; |
| 128 | data_en = 0; |
| 129 | ret |= awg_generate_instr(REPLAY, val, 0, data_en, fwparams); |
| 130 | } |
| 131 | |
| 132 | if (timing->trailing_pixels > 0) { |
| 133 | /* skip trailing pixel */ |
| 134 | val = timing->blanking_level; |
| 135 | data_en = 0; |
| 136 | ret |= awg_generate_instr(RPLSET, val, 0, data_en, fwparams); |
| 137 | |
| 138 | val = timing->trailing_pixels - 1; |
| 139 | data_en = 0; |
| 140 | ret |= awg_generate_instr(SKIP, val, 0, data_en, fwparams); |
| 141 | } |
| 142 | |
| 143 | /* set DE signal high */ |
| 144 | val = timing->blanking_level; |
| 145 | data_en = 1; |
| 146 | ret |= awg_generate_instr((timing->trailing_pixels > 0) ? SET : RPLSET, |
| 147 | val, 0, data_en, fwparams); |
| 148 | |
| 149 | if (timing->blanking_pixels > 0) { |
| 150 | /* skip the number of active pixel */ |
| 151 | val = timing->active_pixels - 1; |
| 152 | data_en = 1; |
| 153 | ret |= awg_generate_instr(SKIP, val, 0, data_en, fwparams); |
| 154 | |
| 155 | /* set DE signal low */ |
| 156 | val = timing->blanking_level; |
| 157 | data_en = 0; |
| 158 | ret |= awg_generate_instr(SET, val, 0, data_en, fwparams); |
| 159 | } |
| 160 | |
| 161 | /* replay the sequence as many active lines defined */ |
| 162 | val = timing->active_lines - 1; |
| 163 | data_en = 0; |
| 164 | ret |= awg_generate_instr(REPLAY, val, 0, data_en, fwparams); |
| 165 | |
| 166 | if (timing->blanking_lines > 0) { |
| 167 | /* skip blanking lines */ |
| 168 | val = timing->blanking_level; |
| 169 | data_en = 0; |
| 170 | ret |= awg_generate_instr(RPLSET, val, 0, data_en, fwparams); |
| 171 | |
| 172 | val = timing->blanking_lines - 1; |
| 173 | data_en = 0; |
| 174 | ret |= awg_generate_instr(REPLAY, val, 0, data_en, fwparams); |
| 175 | } |
| 176 | |
| 177 | return ret; |
| 178 | } |