int sm750_hw_i2c_init(unsigned char bus_speed_mode)
{
unsigned int value;
/* Enable GPIO 30 & 31 as IIC clock & data */
value = peek32(GPIO_MUX);
value |= (GPIO_MUX_30 | GPIO_MUX_31);
poke32(GPIO_MUX, value);
/*
* Enable Hardware I2C power.
* TODO: Check if we need to enable GPIO power?
*/
sm750_enable_i2c(1);
/* Enable the I2C Controller and set the bus speed mode */
value = peek32(I2C_CTRL) & ~(I2C_CTRL_MODE | I2C_CTRL_EN);
if (bus_speed_mode)
value |= I2C_CTRL_MODE;
value |= I2C_CTRL_EN;
poke32(I2C_CTRL, value);
return 0;
}
static void swPanelPowerSequence(int disp, int delay)
{
unsigned int reg;
/* disp should be 1 to open sequence */
reg = peek32(PANEL_DISPLAY_CTRL);
reg |= (disp ? PANEL_DISPLAY_CTRL_FPEN : 0);
poke32(PANEL_DISPLAY_CTRL, reg);
primary_wait_vertical_sync(delay);
reg = peek32(PANEL_DISPLAY_CTRL);
reg |= (disp ? PANEL_DISPLAY_CTRL_DATA : 0);
poke32(PANEL_DISPLAY_CTRL, reg);
primary_wait_vertical_sync(delay);
reg = peek32(PANEL_DISPLAY_CTRL);
reg |= (disp ? PANEL_DISPLAY_CTRL_VBIASEN : 0);
poke32(PANEL_DISPLAY_CTRL, reg);
primary_wait_vertical_sync(delay);
reg = peek32(PANEL_DISPLAY_CTRL);
reg |= (disp ? PANEL_DISPLAY_CTRL_FPEN : 0);
poke32(PANEL_DISPLAY_CTRL, reg);
primary_wait_vertical_sync(delay);
}
void sm750_set_current_gate(unsigned int gate)
{
if (get_power_mode() == POWER_MODE_CTRL_MODE_MODE1)
poke32(MODE1_GATE, gate);
else
poke32(MODE0_GATE, gate);
}
static void setDisplayControl(int ctrl, int disp_state)
{
/* state != 0 means turn on both timing & plane en_bit */
unsigned long reg, val, reserved;
int cnt = 0;
if (!ctrl) {
reg = PANEL_DISPLAY_CTRL;
reserved = PANEL_DISPLAY_CTRL_RESERVED_MASK;
} else {
reg = CRT_DISPLAY_CTRL;
reserved = CRT_DISPLAY_CTRL_RESERVED_MASK;
}
val = peek32(reg);
if (disp_state) {
/*
* Timing should be enabled first before enabling the
* plane because changing at the same time does not
* guarantee that the plane will also enabled or
* disabled.
*/
val |= DISPLAY_CTRL_TIMING;
poke32(reg, val);
val |= DISPLAY_CTRL_PLANE;
/*
* Somehow the register value on the plane is not set
* until a few delay. Need to write and read it a
* couple times
*/
do {
cnt++;
poke32(reg, val);
} while ((peek32(reg) & ~reserved) != (val & ~reserved));
pr_debug("Set Plane enbit:after tried %d times\n", cnt);
} else {
/*
* When turning off, there is no rule on the
* programming sequence since whenever the clock is
* off, then it does not matter whether the plane is
* enabled or disabled. Note: Modifying the plane bit
* will take effect on the next vertical sync. Need to
* find out if it is necessary to wait for 1 vsync
* before modifying the timing enable bit.
*/
val &= ~DISPLAY_CTRL_PLANE;
poke32(reg, val);
val &= ~DISPLAY_CTRL_TIMING;
poke32(reg, val);
}
}
void ddk750_set_dpms(DPMS_t state)
{
unsigned int value;
if (sm750_get_chip_type() == SM750LE) {
value = peek32(CRT_DISPLAY_CTRL) & ~CRT_DISPLAY_CTRL_DPMS_MASK;
value |= (state << CRT_DISPLAY_CTRL_DPMS_SHIFT);
poke32(CRT_DISPLAY_CTRL, value);
} else {
value = peek32(SYSTEM_CTRL);
value = (value & ~SYSTEM_CTRL_DPMS_MASK) | state;
poke32(SYSTEM_CTRL, value);
}
}
/*
* This function reads data from the slave device and stores them
* in the given buffer
*
* Parameters:
* addr - i2c Slave device address
* length - Total number of bytes to be read
* buf - Pointer to a buffer to be filled with the data read
* from the slave device. It has to be the same size as the
* length to make sure that it can keep all the data read.
*
* Return Value:
* Total number of actual bytes read from the slave device
*/
static unsigned int hw_i2c_read_data(unsigned char addr,
unsigned int length,
unsigned char *buf)
{
unsigned char count, i;
unsigned int total_bytes = 0;
/* Set the Device Address */
poke32(I2C_SLAVE_ADDRESS, addr | 0x01);
/*
* Read data and save them to the buffer.
* Note:
* Only 16 byte can be accessed per i2c start instruction.
*/
do {
/*
* Reset I2C by writing 0 to I2C_RESET register to
* clear all the status.
*/
poke32(I2C_RESET, 0);
/* Set the number of bytes to be read */
if (length <= MAX_HWI2C_FIFO)
count = length - 1;
else
count = MAX_HWI2C_FIFO - 1;
poke32(I2C_BYTE_COUNT, count);
/* Start the I2C */
poke32(I2C_CTRL, peek32(I2C_CTRL) | I2C_CTRL_CTRL);
/* Wait until transaction done. */
if (hw_i2c_wait_tx_done() != 0)
break;
/* Save the data to the given buffer */
for (i = 0; i <= count; i++)
*buf++ = peek32(I2C_DATA0 + i);
/* Subtract length by 16 */
length -= (count + 1);
/* Number of bytes read. */
total_bytes += (count + 1);
} while (length > 0);
return total_bytes;
}
/*
* This function writes data to the i2c slave device registers.
*
* Parameters:
* addr - i2c Slave device address
* length - Total number of bytes to be written to the device
* buf - The buffer that contains the data to be written to the
* i2c device.
*
* Return Value:
* Total number of bytes those are actually written.
*/
static unsigned int hw_i2c_write_data(unsigned char addr,
unsigned int length,
unsigned char *buf)
{
unsigned char count, i;
unsigned int total_bytes = 0;
/* Set the Device Address */
poke32(I2C_SLAVE_ADDRESS, addr & ~0x01);
/*
* Write data.
* Note:
* Only 16 byte can be accessed per i2c start instruction.
*/
do {
/*
* Reset I2C by writing 0 to I2C_RESET register to
* clear the previous status.
*/
poke32(I2C_RESET, 0);
/* Set the number of bytes to be written */
if (length < MAX_HWI2C_FIFO)
count = length - 1;
else
count = MAX_HWI2C_FIFO - 1;
poke32(I2C_BYTE_COUNT, count);
/* Move the data to the I2C data register */
for (i = 0; i <= count; i++)
poke32(I2C_DATA0 + i, *buf++);
/* Start the I2C */
poke32(I2C_CTRL, peek32(I2C_CTRL) | I2C_CTRL_CTRL);
/* Wait until the transfer is completed. */
if (hw_i2c_wait_tx_done() != 0)
break;
/* Subtract length */
length -= (count + 1);
/* Total byte written */
total_bytes += (count + 1);
} while (length > 0);
return total_bytes;
}
/*
* This function set up the main chip clock.
*
* Input: Frequency to be set.
*/
static void set_chip_clock(unsigned int frequency)
{
struct pll_value pll;
unsigned int ulActualMxClk;
/* Cheok_0509: For SM750LE, the chip clock is fixed. Nothing to set. */
if (sm750_get_chip_type() == SM750LE)
return;
if (frequency) {
/*
* Set up PLL structure to hold the value to be set in clocks.
*/
pll.inputFreq = DEFAULT_INPUT_CLOCK; /* Defined in CLOCK.H */
pll.clockType = MXCLK_PLL;
/*
* Call sm750_calc_pll_value() to fill the other fields
* of the PLL structure. Sometimes, the chip cannot set
* up the exact clock required by the User.
* Return value of sm750_calc_pll_value gives the actual
* possible clock.
*/
ulActualMxClk = sm750_calc_pll_value(frequency, &pll);
/* Master Clock Control: MXCLK_PLL */
poke32(MXCLK_PLL_CTRL, sm750_format_pll_reg(&pll));
}
}
unsigned int ddk750_get_vm_size(void)
{
unsigned int reg;
unsigned int data;
/* sm750le only use 64 mb memory*/
if (sm750_get_chip_type() == SM750LE)
return SZ_64M;
/* for 750,always use power mode0*/
reg = peek32(MODE0_GATE);
reg |= MODE0_GATE_GPIO;
poke32(MODE0_GATE, reg);
/* get frame buffer size from GPIO */
reg = peek32(MISC_CTRL) & MISC_CTRL_LOCALMEM_SIZE_MASK;
switch (reg) {
case MISC_CTRL_LOCALMEM_SIZE_8M:
data = SZ_8M; break; /* 8 Mega byte */
case MISC_CTRL_LOCALMEM_SIZE_16M:
data = SZ_16M; break; /* 16 Mega byte */
case MISC_CTRL_LOCALMEM_SIZE_32M:
data = SZ_32M; break; /* 32 Mega byte */
case MISC_CTRL_LOCALMEM_SIZE_64M:
data = SZ_64M; break; /* 64 Mega byte */
default:
data = 0;
break;
}
return data;
}
void sm750_hw_i2c_close(void)
{
unsigned int value;
/* Disable I2C controller */
value = peek32(I2C_CTRL) & ~I2C_CTRL_EN;
poke32(I2C_CTRL, value);
/* Disable I2C Power */
sm750_enable_i2c(0);
/* Set GPIO 30 & 31 back as GPIO pins */
value = peek32(GPIO_MUX);
value &= ~GPIO_MUX_30;
value &= ~GPIO_MUX_31;
poke32(GPIO_MUX, value);
}
void ostimer_init(void)
{
/* Timer wraps when it hits comparison value */
poke32(TCU_OSTCSR, OSTCSR_PRESCALE_16);
/* Counter initial value. */
poke32(TCU_OSTCNTH, 0);
poke32(TCU_OSTCNTL, 0);
/* Use EXTCLK as the clock source */
poke32(TCU_OSTCSR, peek32(TCU_OSTCSR) | OSTCSR_EXT_EN);
/* Comparison value -- once every MS. */
poke32(TCU_OSTDR, OS_TIMER_HZ / 1000);
/* Enable the timer*/
poke32(TESR, TER_OSTEN);
/* Register for interrupts */
intc_register_handler_tcu0(ostimer_interrupt);
/* Unmask timer IRQ, in TCU */
poke32(TMCR, TMR_OSTMASK);
/* Unmask timer IRQ, in interrupt controller */
intc_irq_unmask_tcu0();
}
/*
* This function initializes the i2c attributes and bus
*
* Parameters:
* clk_gpio - The GPIO pin to be used as i2c SCL
* data_gpio - The GPIO pin to be used as i2c SDA
*
* Return Value:
* -1 - Fail to initialize the i2c
* 0 - Success
*/
long sm750_sw_i2c_init(unsigned char clk_gpio, unsigned char data_gpio)
{
int i;
/*
* Return 0 if the GPIO pins to be used is out of range. The
* range is only from [0..63]
*/
if ((clk_gpio > 31) || (data_gpio > 31))
return -1;
if (sm750_get_chip_type() == SM750LE)
return sm750le_i2c_init(clk_gpio, data_gpio);
/* Initialize the GPIO pin for the i2c Clock Register */
sw_i2c_clk_gpio_mux_reg = GPIO_MUX;
sw_i2c_clk_gpio_data_reg = GPIO_DATA;
sw_i2c_clk_gpio_data_dir_reg = GPIO_DATA_DIRECTION;
/* Initialize the Clock GPIO Offset */
sw_i2c_clk_gpio = clk_gpio;
/* Initialize the GPIO pin for the i2c Data Register */
sw_i2c_data_gpio_mux_reg = GPIO_MUX;
sw_i2c_data_gpio_data_reg = GPIO_DATA;
sw_i2c_data_gpio_data_dir_reg = GPIO_DATA_DIRECTION;
/* Initialize the Data GPIO Offset */
sw_i2c_data_gpio = data_gpio;
/* Enable the GPIO pins for the i2c Clock and Data (GPIO MUX) */
poke32(sw_i2c_clk_gpio_mux_reg,
peek32(sw_i2c_clk_gpio_mux_reg) & ~(1 << sw_i2c_clk_gpio));
poke32(sw_i2c_data_gpio_mux_reg,
peek32(sw_i2c_data_gpio_mux_reg) & ~(1 << sw_i2c_data_gpio));
/* Enable GPIO power */
sm750_enable_gpio(1);
/* Clear the i2c lines. */
for (i = 0; i < 9; i++)
sw_i2c_stop();
return 0;
}
void ostimer_interrupt(void)
{
for(int i = 0; i < timer_callback_count; i++)
timer_callbacks[i]();
/* Clear interrupt flag. If we don't do this we will immediately return to
* this interrupt on exit! */
poke32(TFCR, TFR_OSTFLAG);
}
int main(int, char *[]){
srandom(time(NULL)); //seed random()
if ((fp = ::open("/dev/usrp_e0", O_RDWR)) < 0){
std::cerr << "Open failed" << std::endl;
return -1;
}
size_t num_pass = 0, num_fail = 0;
for (size_t i = 0; i < num_test_iters; i++){
if(i%1000000 == 0) {
std::cout << "num pass: "******"\tnum fail: " << num_fail << std::endl;
}
//make random values
int random_test32 = ::random();
int random_test16 = ::random() & 0xffff;
int random_secs = ::random();
//set a bunch of registers
poke16(UE_REG_MISC_TEST, random_test16);
poke32(UE_REG_SR_MISC_TEST32, random_test32);
poke32(UE_REG_TIME64_TICKS, 0);
poke32(UE_REG_TIME64_IMM, 1); //immediate
poke32(UE_REG_TIME64_SECS, random_secs);
//read a bunch of registers
if (
(peek16(UE_REG_MISC_TEST) == random_test16) and
(peek32(UE_REG_RB_MISC_TEST32) == random_test32) and
(peek32(UE_REG_RB_TIME_NOW_SECS) == random_secs) and
// (peek32(UE_REG_RB_TIME_NOW_TICKS) < 1000000) and
true) num_pass++;
else num_fail++;
}
std::cout << "num pass: "******"num fail: " << num_fail << std::endl;
::close(fp);
return 0;
}
/*
* Return memory size of sm750 in bytes
*/
int hw_get_memsize(struct ufb_data * ufb)
{
uint32_t ulreg;
ENTER();
ulreg = peek32(ufb,MODE0_GATE);
ulreg = FIELD_SET(ulreg,MODE0_GATE,GPIO,ON);
poke32(ufb,MODE0_GATE,ulreg);
ulreg = ddk750_getFrameBufSize(ufb);
LEAVE ((int)ulreg);
}
static int fixcrash( TSF32 FarPtr client )
{
static unsigned char opcode;
static unsigned short opcodew;
static int zero = 0;
peek32( client->eip, client->cs, &opcodew, 2 );
opcode = (unsigned char)( opcodew & 0xFF );
/* We zero the word on the stack because we will return to the
POP instruction and try again. We also zero the offending
register, because if we take a fault while we're in the middle
of ihandle, ihandle itself will pop the register and cause
a recursive crash loop.
*/
if( opcode == 0x07 ) { /* POP ES */
client->es = 0;
coverup:
poke32( client->esp, client->ss, &zero, 2 );
return( 1 );
}
if( opcode == 0x1F ) { /* POP DS */
client->ds = 0;
goto coverup;
}
if( opcodew == 0xA10F ) { /* POP FS */
client->fs = 0;
goto coverup;
}
if( opcodew == 0xA90F ) { /* POP GS */
client->gs = 0;
goto coverup;
}
/* Attempt to fix up the Microsoft floating point emulator,
which overstores FWAIT instructions with "mov ax,ax"
using the instruction mov ds:[si],C089h and does lots of
other sneaky tricks
*/
if( fix_fpe_fault( opcodew, client ) ) {
return( 1 );
}
#if 0
/* Attempt to fix up references to Phar Lap selector 0x34
*/
int fixed = 0;
if( client->es == 0x34 ) client->es = client->ds, fixed++;
if( client->fs == 0x34 ) client->fs = client->ds, fixed++;
if( client->gs == 0x34 ) client->gs = client->ds, fixed++;
if( fixed ) return( 1 );
#endif
return( 0 );
}
void ddk750_setLogicalDispOut(enum disp_output output)
{
unsigned int reg;
if (output & PNL_2_USAGE) {
/* set panel path controller select */
reg = peek32(PANEL_DISPLAY_CTRL);
reg &= ~PANEL_DISPLAY_CTRL_SELECT_MASK;
reg |= (((output & PNL_2_MASK) >> PNL_2_OFFSET) <<
PANEL_DISPLAY_CTRL_SELECT_SHIFT);
poke32(PANEL_DISPLAY_CTRL, reg);
}
static int fix_fpe_fault( unsigned short opcodew, TSF32 FarPtr client )
{
static unsigned char imm8, val8;
static unsigned short imm16;
switch( opcodew ) {
case 0x04C7 : /* mov ds:[si], imm16 */
peek32( client->eip + 2, client->cs, &imm16, 2 );
poke32( client->esi, client->ds, &imm16, 2 );
client->eip += 4;
break;
case 0x0429 : /* sub ds:[si], ax */
peek32( client->esi, client->ds, &imm16, 2 );
imm16 -= (int)client->eax;
poke32( client->esi, client->ds, &imm16, 2 );
client->eip += 2;
break;
case 0x04C6 : /* mov ds:[si], imm8 */
peek32( client->eip + 2, client->cs, &imm8, 1 );
poke32( client->esi, client->ds, &imm8, 1 );
client->eip += 3;
break;
case 0x0C80 : /* or byte ptr[si], C0 */
peek32( client->esi, client->ds, &val8, 1 );
peek32( client->eip + 2, client->cs, &imm8, 1 );
val8 |= imm8;
poke32( client->esi, client->ds, &val8, 1 );
client->eip += 3;
break;
case 0x0489 : /* mov ds:[si], ax */
imm16 = (int)client->eax;
poke32( client->esi, client->ds, &imm16, 2 );
client->eip += 2;
break;
default :
return( 0 );
break;
}
return( 1 );
}
/*
* This function set/reset the SDA GPIO pin
*
* Parameters:
* value - Bit value to set to the SCL or SDA (0 = low, 1 = high)
*
* Notes:
* When setting SCL to high, just set the GPIO as input where the pull up
* resistor will pull the signal up. Do not use software to pull up the
* signal because the i2c will fail when other device try to drive the
* signal due to SM50x will drive the signal to always high.
*/
static void sw_i2c_sda(unsigned char value)
{
unsigned long gpio_data;
unsigned long gpio_dir;
gpio_dir = peek32(sw_i2c_data_gpio_data_dir_reg);
if (value) { /* High */
/*
* Set direction as input. This will automatically
* pull the signal up.
*/
gpio_dir &= ~(1 << sw_i2c_data_gpio);
poke32(sw_i2c_data_gpio_data_dir_reg, gpio_dir);
} else { /* Low */
/* Set the signal down */
gpio_data = peek32(sw_i2c_data_gpio_data_reg);
gpio_data &= ~(1 << sw_i2c_data_gpio);
poke32(sw_i2c_data_gpio_data_reg, gpio_data);
/* Set direction as output */
gpio_dir |= (1 << sw_i2c_data_gpio);
poke32(sw_i2c_data_gpio_data_dir_reg, gpio_dir);
}
}
/*
* SM50x can operate in one of three modes: 0, 1 or Sleep.
* On hardware reset, power mode 0 is default.
*/
void sm750_set_power_mode(unsigned int mode)
{
unsigned int ctrl = 0;
ctrl = peek32(POWER_MODE_CTRL) & ~POWER_MODE_CTRL_MODE_MASK;
if (sm750_get_chip_type() == SM750LE)
return;
switch (mode) {
case POWER_MODE_CTRL_MODE_MODE0:
ctrl |= POWER_MODE_CTRL_MODE_MODE0;
break;
case POWER_MODE_CTRL_MODE_MODE1:
ctrl |= POWER_MODE_CTRL_MODE_MODE1;
break;
case POWER_MODE_CTRL_MODE_SLEEP:
ctrl |= POWER_MODE_CTRL_MODE_SLEEP;
break;
default:
break;
}
/* Set up other fields in Power Control Register */
if (mode == POWER_MODE_CTRL_MODE_SLEEP) {
ctrl &= ~POWER_MODE_CTRL_OSC_INPUT;
#ifdef VALIDATION_CHIP
ctrl &= ~POWER_MODE_CTRL_336CLK;
#endif
} else {
ctrl |= POWER_MODE_CTRL_OSC_INPUT;
#ifdef VALIDATION_CHIP
ctrl |= POWER_MODE_CTRL_336CLK;
#endif
}
/* Program new power mode. */
poke32(POWER_MODE_CTRL, ctrl);
}
/*
* This function read the data from the SDA GPIO pin
*
* Return Value:
* The SDA data bit sent by the Slave
*/
static unsigned char sw_i2c_read_sda(void)
{
unsigned long gpio_dir;
unsigned long gpio_data;
unsigned long dir_mask = 1 << sw_i2c_data_gpio;
/* Make sure that the direction is input (High) */
gpio_dir = peek32(sw_i2c_data_gpio_data_dir_reg);
if ((gpio_dir & dir_mask) != ~dir_mask) {
gpio_dir &= ~(1 << sw_i2c_data_gpio);
poke32(sw_i2c_data_gpio_data_dir_reg, gpio_dir);
}
/* Now read the SDA line */
gpio_data = peek32(sw_i2c_data_gpio_data_reg);
if (gpio_data & (1 << sw_i2c_data_gpio))
return 1;
else
return 0;
}
void D32DebugSetBreak( OFFSET32 off, SELECTOR sel, int translate, unsigned char far *to, unsigned char far *from )
{
Fptr32 fp;
char temp[4];
if( translate ) {
fp.sel = sel;
fp.off = off;
D32Relocate( &fp );
sel = fp.sel;
off = fp.off;
}
peek32( off, sel, temp, 1 );
/* Don't set a breakpoint if there's already one there, or we lose
the previously saved byte.
*/
if( *temp != *to ) {
*from = *temp;
poke32( off, sel, to, 1 );
}
}
int ddk750_init_hw(struct initchip_param *pInitParam)
{
unsigned int reg;
if (pInitParam->powerMode != 0)
pInitParam->powerMode = 0;
sm750_set_power_mode(pInitParam->powerMode);
/* Enable display power gate & LOCALMEM power gate*/
reg = peek32(CURRENT_GATE);
reg |= (CURRENT_GATE_DISPLAY | CURRENT_GATE_LOCALMEM);
sm750_set_current_gate(reg);
if (sm750_get_chip_type() != SM750LE) {
/* set panel pll and graphic mode via mmio_88 */
reg = peek32(VGA_CONFIGURATION);
reg |= (VGA_CONFIGURATION_PLL | VGA_CONFIGURATION_MODE);
poke32(VGA_CONFIGURATION, reg);
} else {
#if defined(__i386__) || defined(__x86_64__)
/* set graphic mode via IO method */
outb_p(0x88, 0x3d4);
outb_p(0x06, 0x3d5);
#endif
}
/* Set the Main Chip Clock */
set_chip_clock(MHz((unsigned int)pInitParam->chipClock));
/* Set up memory clock. */
set_memory_clock(MHz(pInitParam->memClock));
/* Set up master clock */
set_master_clock(MHz(pInitParam->masterClock));
/*
* Reset the memory controller.
* If the memory controller is not reset in SM750,
* the system might hang when sw accesses the memory.
* The memory should be resetted after changing the MXCLK.
*/
if (pInitParam->resetMemory == 1) {
reg = peek32(MISC_CTRL);
reg &= ~MISC_CTRL_LOCALMEM_RESET;
poke32(MISC_CTRL, reg);
reg |= MISC_CTRL_LOCALMEM_RESET;
poke32(MISC_CTRL, reg);
}
if (pInitParam->setAllEngOff == 1) {
sm750_enable_2d_engine(0);
/* Disable Overlay, if a former application left it on */
reg = peek32(VIDEO_DISPLAY_CTRL);
reg &= ~DISPLAY_CTRL_PLANE;
poke32(VIDEO_DISPLAY_CTRL, reg);
/* Disable video alpha, if a former application left it on */
reg = peek32(VIDEO_ALPHA_DISPLAY_CTRL);
reg &= ~DISPLAY_CTRL_PLANE;
poke32(VIDEO_ALPHA_DISPLAY_CTRL, reg);
/* Disable alpha plane, if a former application left it on */
reg = peek32(ALPHA_DISPLAY_CTRL);
reg &= ~DISPLAY_CTRL_PLANE;
poke32(ALPHA_DISPLAY_CTRL, reg);
/* Disable DMA Channel, if a former application left it on */
reg = peek32(DMA_ABORT_INTERRUPT);
reg |= DMA_ABORT_INTERRUPT_ABORT_1;
poke32(DMA_ABORT_INTERRUPT, reg);
/* Disable DMA Power, if a former application left it on */
sm750_enable_dma(0);
}
/* We can add more initialization as needed. */
return 0;
}
void displayPutChar (int x, int y, char c)
{
poke32 (DISPLAY_BASE_ADDRESS + (y*64 + x)*4, c);
}
