![Nishka Dasgupta](/assets/img/avatar_default.png)
Edit CamelCase in local variables across 4 files: - sm750fb/ddk750_chip.c - sm750fb/ddk750_chip.h - sm750fb/ddk750_dvi.c - sm750fb/ddk750_sii164.c to comply with the coding style. Also edit associated comments accordingly. Issue found with Checkpatch. Signed-off-by: Nishka Dasgupta <nishka.dasgupta@yahoo.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
399 lines
11 KiB
C
399 lines
11 KiB
C
// 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
|