| // 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: |
| * edgeSelect - 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) |
| * busSelect - Input Bus Select: |
| * 0 = Input data bus is 12-bits wide |
| * 1 = Input data bus is 24-bits wide |
| * dualEdgeClkSelect - Dual Edge Clock Select |
| * 0 = Input data is single edge latched |
| * 1 = Input data is dual edge latched |
| * hsyncEnable - Horizontal Sync Enable: |
| * 0 = HSYNC input is transmitted as fixed LOW |
| * 1 = HSYNC input is transmitted as is |
| * vsyncEnable - Vertical Sync Enable: |
| * 0 = VSYNC input is transmitted as fixed LOW |
| * 1 = VSYNC input is transmitted as is |
| * deskewEnable - De-skewing Enable: |
| * 0 = De-skew disabled |
| * 1 = De-skew enabled |
| * deskewSetting - 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 |
| * continuousSyncEnable- SYNC Continuous: |
| * 0 = Disable |
| * 1 = Enable |
| * pllFilterEnable - PLL Filter Enable |
| * 0 = Disable PLL Filter |
| * 1 = Enable PLL Filter |
| * pllFilterValue - PLL Filter characteristics: |
| * 0~7 (recommended value is 4) |
| * |
| * Output: |
| * 0 - Success |
| * -1 - Fail. |
| */ |
| long sii164InitChip(unsigned char edgeSelect, |
| unsigned char busSelect, |
| unsigned char dualEdgeClkSelect, |
| unsigned char hsyncEnable, |
| unsigned char vsyncEnable, |
| unsigned char deskewEnable, |
| unsigned char deskewSetting, |
| unsigned char continuousSyncEnable, |
| unsigned char pllFilterEnable, |
| unsigned char pllFilterValue) |
| { |
| 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 (edgeSelect == 0) |
| config = SII164_CONFIGURATION_LATCH_FALLING; |
| else |
| config = SII164_CONFIGURATION_LATCH_RISING; |
| |
| /* Select bus wide */ |
| if (busSelect == 0) |
| config |= SII164_CONFIGURATION_BUS_12BITS; |
| else |
| config |= SII164_CONFIGURATION_BUS_24BITS; |
| |
| /* Select Dual/Single Edge Clock */ |
| if (dualEdgeClkSelect == 0) |
| config |= SII164_CONFIGURATION_CLOCK_SINGLE; |
| else |
| config |= SII164_CONFIGURATION_CLOCK_DUAL; |
| |
| /* Select HSync Enable */ |
| if (hsyncEnable == 0) |
| config |= SII164_CONFIGURATION_HSYNC_FORCE_LOW; |
| else |
| config |= SII164_CONFIGURATION_HSYNC_AS_IS; |
| |
| /* Select VSync Enable */ |
| if (vsyncEnable == 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 (deskewEnable == 0) |
| config = SII164_DESKEW_DISABLE; |
| else |
| config = SII164_DESKEW_ENABLE; |
| |
| switch (deskewSetting) { |
| 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 (continuousSyncEnable == 0) |
| config = SII164_PLL_FILTER_SYNC_CONTINUOUS_DISABLE; |
| else |
| config = SII164_PLL_FILTER_SYNC_CONTINUOUS_ENABLE; |
| |
| /* Enable/Disable PLL Filter */ |
| if (pllFilterEnable == 0) |
| config |= SII164_PLL_FILTER_DISABLE; |
| else |
| config |= SII164_PLL_FILTER_ENABLE; |
| |
| /* Set the PLL Filter value */ |
| config |= ((pllFilterValue & 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 |
