/*
* Configure all necessary GPIO pins
*/
static void gpio_init(void)
{
/*
* Enable power on GPIO. This is not really necessary, because power
* on GPIO is enabled on SoC reset.
*/
lpc178x_periph_enable(LPC178X_SCC_PCONP_PCGPIO_MSK, 1);
/*
* Configure GPIO pins using the `ea_lpc1788_gpio[]` table
*/
lpc178x_gpio_config_table(ea_lpc1788_gpio, ARRAY_SIZE(ea_lpc1788_gpio));
#ifdef CONFIG_NR_DRAM_BANKS
/*
* Configure GPIO pins used for the External Memory Controller (EMC)
*/
struct lpc178x_gpio_dsc dsc;
/* Configure EMC data pins (DQ0..DQ31) */
dsc.port = 3;
for (dsc.pin = 0; dsc.pin <= LPC178X_EMC_DATA_PINS; dsc.pin++)
lpc178x_gpio_config(&dsc, LPC178X_GPIO_EMC_REGVAL);
/*
* Configure EMC row/column address pins (A0..A11) and
* NOR FLash address pins.
*/
dsc.port = 4;
for (dsc.pin = 0; dsc.pin <= LPC178X_EMC_ADDR_PINS; dsc.pin++)
lpc178x_gpio_config(&dsc, LPC178X_GPIO_EMC_REGVAL);
#endif
}
/*
* Initialize the GPIO Alternative Functions of the LPC178x/7x.
*/
void __init lpc178x_iomux_init(void)
{
int platform;
/*
* Enable power on GPIO. This is not really necessary, because power
* on GPIO is enabled on SoC reset.
*/
lpc178x_periph_enable(LPC178X_SCC_PCONP_PCGPIO_MSK, 1);
/*
* Configure IOs depending on the board we're running on, and
* the configuration options we're using.
* Let's control platform strictly: if some of it does not need to
* play with iomux, it must be present in switch below (otherwise,
* the warning message will be printed-out)
*/
platform = lpc178x_platform_get();
switch (platform) {
case PLATFORM_LPC178X_EA_LPC1788:
lpc178x_gpio_config_table(
ea_lpc1788_gpio, ARRAY_SIZE(ea_lpc1788_gpio));
break;
case PLATFORM_LPC178X_LNX_EVB:
lpc178x_gpio_config_table(
lpc_lnx_evb_gpio, ARRAY_SIZE(lpc_lnx_evb_gpio));
break;
default:
printk(KERN_WARNING "%s: unsupported platform %d\n", __func__,
platform);
break;
}
}
void __init lpc178x_fb_init(void)
{
int platform;
int have_lcd;
int ret;
/*
* Run board-specific code
*/
have_lcd = 0;
ret = 0;
platform = lpc178x_platform_get();
switch (platform) {
case PLATFORM_LPC178X_EA_LPC1788:
have_lcd = 1;
/*
* This code finally makes the function
* `ealcd004_pca9532_probe()` to execute.
*/
ret = i2c_add_driver(&ealcd004_pca9532_driver);
if (ret < 0)
goto out;
ret = i2c_register_board_info(0, &ea_lpc1788_lcd_004_dimmer, 1);
if (ret < 0)
goto out;
break;
case PLATFORM_LPC178X_LNX_EVB:
/* Do not configure LCD on LPC-LNX-EVB for now */
break;
default:
break;
}
if (!have_lcd)
goto out;
/*
* Enable the power on the LCD controller module of the MCU
* before we call `amba_device_register()`. This is required, because
* `amba_device_register()` will try to read the AMBA device ID
* from the LCD controller module's register map; if the power on
* the module is off, its registers are not accessible.
*/
lpc178x_periph_enable(LPC178X_SCC_PCONP_PCLCD_MSK, 1);
amba_device_register(&lpc178x_fb_device, &iomem_resource);
out:
if (ret < 0) {
printk(KERN_ERR "lpc178x fb: Could not initialize "
"the LCD screen.\n");
}
}
/*
* Early hardware init.
*/
int board_init(void)
{
volatile struct lpc178x_emc_st_regs *st;
/*
* Enable power on EMC
*/
lpc178x_periph_enable(LPC178X_SCC_PCONP_PCEMC_MSK, 1);
/*
* Clock delay for EMC
*/
LPC178X_SCC->emcdlyctl =
(LPC178X_EMC_CMDDLY << LPC178X_SCC_EMCDLYCTL_CMDDLY_BITS) |
(LPC178X_EMC_FBCLKDLY << LPC178X_SCC_EMCDLYCTL_FBCLKDLY_BITS);
/*
* Enable EMC
*/
LPC178X_EMC->emcctrl = LPC178X_EMC_CTRL_EN_MSK;
/*
* Little-endian mode
*/
LPC178X_EMC->emccfg = 0;
/*
* Enable GPIO pins
*/
gpio_init();
#ifdef CONFIG_SYS_FLASH_CS
/* Set timing for flash */
st = &LPC178X_EMC->st[CONFIG_SYS_FLASH_CS];
st->cfg = CONFIG_SYS_FLASH_CFG;
st->we = CONFIG_SYS_FLASH_WE;
st->oe = CONFIG_SYS_FLASH_OE;
st->rd = CONFIG_SYS_FLASH_RD;
st->page = CONFIG_SYS_FLASH_PAGE;
st->wr = CONFIG_SYS_FLASH_WR;
st->ta = CONFIG_SYS_FLASH_TA;
#endif
return 0;
}
void pwm_init(){
long pclk;
int pwm_div;
pclk = clock_get(CLOCK_PCLK);
pwm_div = pclk/PWM_CLK - 1;
lpc178x_periph_enable(LPC178X_SCC_PCONP_PWM1_MSK, 1);
LPC178X_PWM1->pwm_ir = 0x73f; //clear all pending
LPC178X_PWM1->pwm_tcr = 0x0;
LPC178X_PWM1->pwm_ctcr = 0x0;
LPC178X_PWM1->pwm_mcr = 0x0;
LPC178X_PWM1->pwm_ccr = 0x0;
LPC178X_PWM1->pwm_pcr = 0x0;
LPC178X_PWM1->pwm_ler = 0x0;
LPC178X_PWM1->pwm_pr = pwm_div;
LPC178X_PWM1->pwm_mr0 = PWM_TOTCNT;
LPC178X_PWM1->pwm_ler |= 0x1<<0; //update mr0
//LPC178X_PWM1->pwm_tcr |= 0x1<<1; //pwm counter reset
//LPC178X_PWM1->pwm_tcr &= 0x9; //
LPC178X_PWM1->pwm_mr1 = PWM_LOWCNT_START;
LPC178X_PWM1->pwm_ler |= 0x1<<1; //update mr1
//LPC178X_PWM1->pwm_tcr |= 0x1<<1; //pwm counter reset
//LPC178X_PWM1->pwm_tcr &= 0x9; //
LPC178X_PWM1->pwm_mcr = 0x1<<1; //PWMTC reset when PWMTC == PWMMR0
LPC178X_PWM1->pwm_pcr |= 0x1<<9; //pwm1[1] output enable
LPC178X_PWM1->pwm_tcr |= 0x1<<1; //pwm counter reset
LPC178X_PWM1->pwm_tcr &= 0x9; //
LPC178X_PWM1->pwm_tcr |= 0x1<<0; //pwm counter enable
LPC178X_PWM1->pwm_tcr |= 0x1<<3; //pwm enable
}
void board_video_init(GraphicDevice *pGD){
long pclk;
int lcd_div;
unsigned int *pboost;
unsigned int *pconp;
lpc178x_periph_enable(LPC178X_SCC_PCONP_LCD_MSK, 1);
pboost = (unsigned int *)0x400FC1B0;
pconp= (unsigned int *)0x400FC0C4;
printf("pboost = 0x%x\n", *pboost);
printf("pconp = 0x%x\n", *pconp);
pclk = clock_get(CLOCK_SYSTICK);
lcd_div = pclk / (pGD->modeIdent[0] * 1000000);
printf("lcd_div = %d\n", lcd_div);
GLCD_Ctrl(0);
LPC178X_LCD->crsr_ctrl &= ~(0x1<<0); //不使用光标
LPC178X_LCD->lcd_ctrl = 0x0;
LPC178X_LCD->lcd_ctrl |= (0x6<<1); //16bpp, 5:6:5 mode
LPC178X_LCD->lcd_ctrl |= (0x1<<5); // TFT panel
LPC178X_LCD->lcd_ctrl &= ~(0x1<<7); // single panel
LPC178X_LCD->lcd_ctrl &= ~(0x1<<8); // RGB normal sequence
LPC178X_LCD->lcd_ctrl &= ~(0x1<<9); // little order
LPC178X_LCD->lcd_ctrl &= ~(0x1<<10); // little order in one byte
LPC178X_LCD->lcd_ctrl &= ~(0x1<<11); // disable LCD_VD[0:23]
if(lcd_div > 0)
lcd_div -= 1;
else
lcd_div = 0;
LPC178X_SCC->lcd_cfg = lcd_div;
LPC178X_LCD->lcd_pol |= (1<<26); // bypass inrenal clk divider
LPC178X_LCD->lcd_pol &= ~(1<<5); // clock source for LCD is CCLK
LPC178X_LCD->lcd_pol |= (1<<11); // LCDFP pin is active Low and inactive HIGH
LPC178X_LCD->lcd_pol |= (1<<12); // LCDLP pin is active Low and inactive HIGH
LPC178X_LCD->lcd_pol |= (1<<13); // data is driven out into the LCD on the falling edge
//active high
LPC178X_LCD->lcd_pol &= ~(1<<14); // LCD_ENAB_M is active high
LPC178X_LCD->lcd_pol &= ~(0x3ff<<16);
LPC178X_LCD->lcd_pol |= ((pGD->winSizeX)-1)<<16; //pixel per line
// init Horizontal Timing
LPC178X_LCD->lcd_timh = 0;
LPC178X_LCD->lcd_timh |= ((pGD->modeIdent[1]) - 1)<<24;
LPC178X_LCD->lcd_timh |= ((pGD->modeIdent[2]) - 1)<<16;
LPC178X_LCD->lcd_timh |= ((pGD->modeIdent[5]) - 1)<<8;
LPC178X_LCD->lcd_timh |= ((pGD->winSizeX)/16 - 1)<<2;
// init Vertical Timing
LPC178X_LCD->lcd_timv = 0;
LPC178X_LCD->lcd_timv |= (pGD->modeIdent[3])<<24;
LPC178X_LCD->lcd_timv |= (pGD->modeIdent[4])<<16;
LPC178X_LCD->lcd_timv |= ((pGD->modeIdent[6]) - 1)<<10;
LPC178X_LCD->lcd_timv |= (pGD->winSizeY) - 1;
// init lcd base addr
LPC178X_LCD->lcd_upbase = pGD->frameAdrs;
LPC178X_LCD->lcd_lpbase = pGD->frameAdrs;
GLCD_Ctrl(1);
pwm_init();
}
