diff options
Diffstat (limited to 'drivers/staging/sm750fb/ddk750_sii164.c')
| -rw-r--r-- | drivers/staging/sm750fb/ddk750_sii164.c | 425 |
1 files changed, 425 insertions, 0 deletions
diff --git a/drivers/staging/sm750fb/ddk750_sii164.c b/drivers/staging/sm750fb/ddk750_sii164.c new file mode 100644 index 000000000000..3d224d6a74ff --- /dev/null +++ b/drivers/staging/sm750fb/ddk750_sii164.c @@ -0,0 +1,425 @@ +#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 hwI2CWriteReg + #define i2cReadReg hwI2CReadReg +#else + #define i2cWriteReg swI2CWriteReg + #define i2cReadReg swI2CReadReg +#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 ucRegIndex, ucRegValue; + //unsigned char ucDeviceAddress, + unsigned char config; + //unsigned long delayCount; + + /* Initialize the i2c bus */ +#ifdef USE_HW_I2C + /* Use fast mode. */ + hwI2CInit(1); +#else + swI2CInit(DEFAULT_I2C_SCL, DEFAULT_I2C_SDA); +#endif + + /* Check if SII164 Chip exists */ + if ((sii164GetVendorID() == SII164_VENDOR_ID) && (sii164GetDeviceID() == SII164_DEVICE_ID)) + { + +#ifdef DDKDEBUG + //sii164PrintRegisterValues(); +#endif + /* + * 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 will fix 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); + +#ifdef DDKDEBUG + //sii164PrintRegisterValues(); +#endif + + return 0; + } + + /* Return -1 if initialization fails. */ + return (-1); +} + + + + + +/* below sii164 function is not neccessary */ + +#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( + sii164_hot_plug_mode_t 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 occured. + * + * 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 + + |