1. 根目录:
2. drivers
3. staging
4. sm750fb
5. ddk750_power.c

#include "ddk750_help.h"
#include "ddk750_reg.h"
#include "ddk750_power.h"

void ddk750_setDPMS(DPMS_t state)
{
	unsigned int value;

	if (getChipType() == SM750LE) {
		value = PEEK32(CRT_DISPLAY_CTRL);
		POKE32(CRT_DISPLAY_CTRL, FIELD_VALUE(value, CRT_DISPLAY_CTRL,
						     DPMS, state));
	} else {
		value = PEEK32(SYSTEM_CTRL);
		value = FIELD_VALUE(value, SYSTEM_CTRL, DPMS, state);
		POKE32(SYSTEM_CTRL, value);
	}
}

static unsigned int getPowerMode(void)
{
	if (getChipType() == SM750LE)
		return 0;
	return FIELD_GET(PEEK32(POWER_MODE_CTRL), POWER_MODE_CTRL, MODE);
}


/*
 * SM50x can operate in one of three modes: 0, 1 or Sleep.
 * On hardware reset, power mode 0 is default.
 */
void setPowerMode(unsigned int powerMode)
{
	unsigned int control_value = 0;

	control_value = PEEK32(POWER_MODE_CTRL);

	if (getChipType() == SM750LE)
		return;

	switch (powerMode) {
	case POWER_MODE_CTRL_MODE_MODE0:
		control_value = FIELD_SET(control_value, POWER_MODE_CTRL, MODE,
					  MODE0);
		break;

	case POWER_MODE_CTRL_MODE_MODE1:
		control_value = FIELD_SET(control_value, POWER_MODE_CTRL, MODE,
					  MODE1);
		break;

	case POWER_MODE_CTRL_MODE_SLEEP:
		control_value = FIELD_SET(control_value, POWER_MODE_CTRL, MODE,
					  SLEEP);
		break;

	default:
		break;
	}

	/* Set up other fields in Power Control Register */
	if (powerMode == POWER_MODE_CTRL_MODE_SLEEP) {
		control_value =
#ifdef VALIDATION_CHIP
		FIELD_SET(control_value, POWER_MODE_CTRL, 336CLK, OFF) |
#endif
		FIELD_SET(control_value, POWER_MODE_CTRL, OSC_INPUT,  OFF);
	} else {
		control_value =
#ifdef VALIDATION_CHIP
		FIELD_SET(control_value, POWER_MODE_CTRL, 336CLK, ON) |
#endif
		FIELD_SET(control_value, POWER_MODE_CTRL, OSC_INPUT,  ON);
	}

	/* Program new power mode. */
	POKE32(POWER_MODE_CTRL, control_value);
}

void setCurrentGate(unsigned int gate)
{
	unsigned int gate_reg;
	unsigned int mode;

	/* Get current power mode. */
	mode = getPowerMode();

	switch (mode) {
	case POWER_MODE_CTRL_MODE_MODE0:
		gate_reg = MODE0_GATE;
		break;

	case POWER_MODE_CTRL_MODE_MODE1:
		gate_reg = MODE1_GATE;
		break;

	default:
		gate_reg = MODE0_GATE;
		break;
	}
	POKE32(gate_reg, gate);
}



/*
 * This function enable/disable the 2D engine.
 */
void enable2DEngine(unsigned int enable)
{
	u32 gate;

	gate = PEEK32(CURRENT_GATE);
	if (enable) {
		gate = FIELD_SET(gate, CURRENT_GATE, DE,  ON);
		gate = FIELD_SET(gate, CURRENT_GATE, CSC, ON);
	} else {
		gate = FIELD_SET(gate, CURRENT_GATE, DE,  OFF);
		gate = FIELD_SET(gate, CURRENT_GATE, CSC, OFF);
	}

	setCurrentGate(gate);
}

void enableDMA(unsigned int enable)
{
	u32 gate;

	/* Enable DMA Gate */
	gate = PEEK32(CURRENT_GATE);
	if (enable)
		gate = FIELD_SET(gate, CURRENT_GATE, DMA, ON);
	else
		gate = FIELD_SET(gate, CURRENT_GATE, DMA, OFF);

	setCurrentGate(gate);
}

/*
 * This function enable/disable the GPIO Engine
 */
void enableGPIO(unsigned int enable)
{
	u32 gate;

	/* Enable GPIO Gate */
	gate = PEEK32(CURRENT_GATE);
	if (enable)
		gate = FIELD_SET(gate, CURRENT_GATE, GPIO, ON);
	else
		gate = FIELD_SET(gate, CURRENT_GATE, GPIO, OFF);

	setCurrentGate(gate);
}

/*
 * This function enable/disable the I2C Engine
 */
void enableI2C(unsigned int enable)
{
	u32 gate;

	/* Enable I2C Gate */
	gate = PEEK32(CURRENT_GATE);
	if (enable)
		gate = FIELD_SET(gate, CURRENT_GATE, I2C, ON);
	else
	gate = FIELD_SET(gate, CURRENT_GATE, I2C, OFF);

	setCurrentGate(gate);
}