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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 | // SPDX-License-Identifier: GPL-2.0 #define USE_DVICHIP #ifdef USE_DVICHIP #include "ddk750_sii164.h" #include "ddk750_hwi2c.h" /* I2C Address of each SII164 chip */ #define SII164_I2C_ADDRESS 0x70 /* Define this definition to use hardware i2c. */ #define USE_HW_I2C #ifdef USE_HW_I2C #define i2cWriteReg sm750_hw_i2c_write_reg #define i2cReadReg sm750_hw_i2c_read_reg #else #define i2cWriteReg sm750_sw_i2c_write_reg #define i2cReadReg sm750_sw_i2c_read_reg #endif /* SII164 Vendor and Device ID */ #define SII164_VENDOR_ID 0x0001 #define SII164_DEVICE_ID 0x0006 #ifdef SII164_FULL_FUNCTIONS /* Name of the DVI Controller chip */ static char *gDviCtrlChipName = "Silicon Image SiI 164"; #endif /* * sii164GetVendorID * This function gets the vendor ID of the DVI controller chip. * * Output: * Vendor ID */ unsigned short sii164GetVendorID(void) { unsigned short vendorID; vendorID = ((unsigned short)i2cReadReg(SII164_I2C_ADDRESS, SII164_VENDOR_ID_HIGH) << 8) | (unsigned short)i2cReadReg(SII164_I2C_ADDRESS, SII164_VENDOR_ID_LOW); return vendorID; } /* * sii164GetDeviceID * This function gets the device ID of the DVI controller chip. * * Output: * Device ID */ unsigned short sii164GetDeviceID(void) { unsigned short deviceID; deviceID = ((unsigned short)i2cReadReg(SII164_I2C_ADDRESS, SII164_DEVICE_ID_HIGH) << 8) | (unsigned short)i2cReadReg(SII164_I2C_ADDRESS, SII164_DEVICE_ID_LOW); return deviceID; } /* DVI.C will handle all SiI164 chip stuffs and try it best to make code minimal and useful */ /* * sii164InitChip * This function initialize and detect the DVI controller chip. * * Input: * edge_select - Edge Select: * 0 = Input data is falling edge latched (falling * edge latched first in dual edge mode) * 1 = Input data is rising edge latched (rising * edge latched first in dual edge mode) * bus_select - Input Bus Select: * 0 = Input data bus is 12-bits wide * 1 = Input data bus is 24-bits wide * dual_edge_clk_select - Dual Edge Clock Select * 0 = Input data is single edge latched * 1 = Input data is dual edge latched * hsync_enable - Horizontal Sync Enable: * 0 = HSYNC input is transmitted as fixed LOW * 1 = HSYNC input is transmitted as is * vsync_enable - Vertical Sync Enable: * 0 = VSYNC input is transmitted as fixed LOW * 1 = VSYNC input is transmitted as is * deskew_enable - De-skewing Enable: * 0 = De-skew disabled * 1 = De-skew enabled * deskew_setting - De-skewing Setting (increment of 260psec) * 0 = 1 step --> minimum setup / maximum hold * 1 = 2 step * 2 = 3 step * 3 = 4 step * 4 = 5 step * 5 = 6 step * 6 = 7 step * 7 = 8 step --> maximum setup / minimum hold * continuous_sync_enable- SYNC Continuous: * 0 = Disable * 1 = Enable * pll_filter_enable - PLL Filter Enable * 0 = Disable PLL Filter * 1 = Enable PLL Filter * pll_filter_value - PLL Filter characteristics: * 0~7 (recommended value is 4) * * Output: * 0 - Success * -1 - Fail. */ long sii164InitChip(unsigned char edge_select, unsigned char bus_select, unsigned char dual_edge_clk_select, unsigned char hsync_enable, unsigned char vsync_enable, unsigned char deskew_enable, unsigned char deskew_setting, unsigned char continuous_sync_enable, unsigned char pll_filter_enable, unsigned char pll_filter_value) { unsigned char config; /* Initialize the i2c bus */ #ifdef USE_HW_I2C /* Use fast mode. */ sm750_hw_i2c_init(1); #else sm750_sw_i2c_init(DEFAULT_I2C_SCL, DEFAULT_I2C_SDA); #endif /* Check if SII164 Chip exists */ if ((sii164GetVendorID() == SII164_VENDOR_ID) && (sii164GetDeviceID() == SII164_DEVICE_ID)) { /* * Initialize SII164 controller chip. */ /* Select the edge */ if (edge_select == 0) config = SII164_CONFIGURATION_LATCH_FALLING; else config = SII164_CONFIGURATION_LATCH_RISING; /* Select bus wide */ if (bus_select == 0) config |= SII164_CONFIGURATION_BUS_12BITS; else config |= SII164_CONFIGURATION_BUS_24BITS; /* Select Dual/Single Edge Clock */ if (dual_edge_clk_select == 0) config |= SII164_CONFIGURATION_CLOCK_SINGLE; else config |= SII164_CONFIGURATION_CLOCK_DUAL; /* Select HSync Enable */ if (hsync_enable == 0) config |= SII164_CONFIGURATION_HSYNC_FORCE_LOW; else config |= SII164_CONFIGURATION_HSYNC_AS_IS; /* Select VSync Enable */ if (vsync_enable == 0) config |= SII164_CONFIGURATION_VSYNC_FORCE_LOW; else config |= SII164_CONFIGURATION_VSYNC_AS_IS; i2cWriteReg(SII164_I2C_ADDRESS, SII164_CONFIGURATION, config); /* * De-skew enabled with default 111b value. * This fixes some artifacts problem in some mode on board 2.2. * Somehow this fix does not affect board 2.1. */ if (deskew_enable == 0) config = SII164_DESKEW_DISABLE; else config = SII164_DESKEW_ENABLE; switch (deskew_setting) { case 0: config |= SII164_DESKEW_1_STEP; break; case 1: config |= SII164_DESKEW_2_STEP; break; case 2: config |= SII164_DESKEW_3_STEP; break; case 3: config |= SII164_DESKEW_4_STEP; break; case 4: config |= SII164_DESKEW_5_STEP; break; case 5: config |= SII164_DESKEW_6_STEP; break; case 6: config |= SII164_DESKEW_7_STEP; break; case 7: config |= SII164_DESKEW_8_STEP; break; } i2cWriteReg(SII164_I2C_ADDRESS, SII164_DESKEW, config); /* Enable/Disable Continuous Sync. */ if (continuous_sync_enable == 0) config = SII164_PLL_FILTER_SYNC_CONTINUOUS_DISABLE; else config = SII164_PLL_FILTER_SYNC_CONTINUOUS_ENABLE; /* Enable/Disable PLL Filter */ if (pll_filter_enable == 0) config |= SII164_PLL_FILTER_DISABLE; else config |= SII164_PLL_FILTER_ENABLE; /* Set the PLL Filter value */ config |= ((pll_filter_value & 0x07) << 1); i2cWriteReg(SII164_I2C_ADDRESS, SII164_PLL, config); /* Recover from Power Down and enable output. */ config = i2cReadReg(SII164_I2C_ADDRESS, SII164_CONFIGURATION); config |= SII164_CONFIGURATION_POWER_NORMAL; i2cWriteReg(SII164_I2C_ADDRESS, SII164_CONFIGURATION, config); return 0; } /* Return -1 if initialization fails. */ return -1; } /* below sii164 function is not necessary */ #ifdef SII164_FULL_FUNCTIONS /* * sii164ResetChip * This function resets the DVI Controller Chip. */ void sii164ResetChip(void) { /* Power down */ sii164SetPower(0); sii164SetPower(1); } /* * sii164GetChipString * This function returns a char string name of the current DVI Controller chip. * It's convenient for application need to display the chip name. */ char *sii164GetChipString(void) { return gDviCtrlChipName; } /* * sii164SetPower * This function sets the power configuration of the DVI Controller Chip. * * Input: * powerUp - Flag to set the power down or up */ void sii164SetPower(unsigned char powerUp) { unsigned char config; config = i2cReadReg(SII164_I2C_ADDRESS, SII164_CONFIGURATION); if (powerUp == 1) { /* Power up the chip */ config &= ~SII164_CONFIGURATION_POWER_MASK; config |= SII164_CONFIGURATION_POWER_NORMAL; i2cWriteReg(SII164_I2C_ADDRESS, SII164_CONFIGURATION, config); } else { /* Power down the chip */ config &= ~SII164_CONFIGURATION_POWER_MASK; config |= SII164_CONFIGURATION_POWER_DOWN; i2cWriteReg(SII164_I2C_ADDRESS, SII164_CONFIGURATION, config); } } /* * sii164SelectHotPlugDetectionMode * This function selects the mode of the hot plug detection. */ static void sii164SelectHotPlugDetectionMode(enum sii164_hot_plug_mode hotPlugMode) { unsigned char detectReg; detectReg = i2cReadReg(SII164_I2C_ADDRESS, SII164_DETECT) & ~SII164_DETECT_MONITOR_SENSE_OUTPUT_FLAG; switch (hotPlugMode) { case SII164_HOTPLUG_DISABLE: detectReg |= SII164_DETECT_MONITOR_SENSE_OUTPUT_HIGH; break; case SII164_HOTPLUG_USE_MDI: detectReg &= ~SII164_DETECT_INTERRUPT_MASK; detectReg |= SII164_DETECT_INTERRUPT_BY_HTPLG_PIN; detectReg |= SII164_DETECT_MONITOR_SENSE_OUTPUT_MDI; break; case SII164_HOTPLUG_USE_RSEN: detectReg |= SII164_DETECT_MONITOR_SENSE_OUTPUT_RSEN; break; case SII164_HOTPLUG_USE_HTPLG: detectReg |= SII164_DETECT_MONITOR_SENSE_OUTPUT_HTPLG; break; } i2cWriteReg(SII164_I2C_ADDRESS, SII164_DETECT, detectReg); } /* * sii164EnableHotPlugDetection * This function enables the Hot Plug detection. * * enableHotPlug - Enable (=1) / disable (=0) Hot Plug detection */ void sii164EnableHotPlugDetection(unsigned char enableHotPlug) { unsigned char detectReg; detectReg = i2cReadReg(SII164_I2C_ADDRESS, SII164_DETECT); /* Depending on each DVI controller, need to enable the hot plug based on each * individual chip design. */ if (enableHotPlug != 0) sii164SelectHotPlugDetectionMode(SII164_HOTPLUG_USE_MDI); else sii164SelectHotPlugDetectionMode(SII164_HOTPLUG_DISABLE); } /* * sii164IsConnected * Check if the DVI Monitor is connected. * * Output: * 0 - Not Connected * 1 - Connected */ unsigned char sii164IsConnected(void) { unsigned char hotPlugValue; hotPlugValue = i2cReadReg(SII164_I2C_ADDRESS, SII164_DETECT) & SII164_DETECT_HOT_PLUG_STATUS_MASK; if (hotPlugValue == SII164_DETECT_HOT_PLUG_STATUS_ON) return 1; else return 0; } /* * sii164CheckInterrupt * Checks if interrupt has occurred. * * Output: * 0 - No interrupt * 1 - Interrupt occurs */ unsigned char sii164CheckInterrupt(void) { unsigned char detectReg; detectReg = i2cReadReg(SII164_I2C_ADDRESS, SII164_DETECT) & SII164_DETECT_MONITOR_STATE_MASK; if (detectReg == SII164_DETECT_MONITOR_STATE_CHANGE) return 1; else return 0; } /* * sii164ClearInterrupt * Clear the hot plug interrupt. */ void sii164ClearInterrupt(void) { unsigned char detectReg; /* Clear the MDI interrupt */ detectReg = i2cReadReg(SII164_I2C_ADDRESS, SII164_DETECT); i2cWriteReg(SII164_I2C_ADDRESS, SII164_DETECT, detectReg | SII164_DETECT_MONITOR_STATE_CLEAR); } #endif #endif |