diff options
Diffstat (limited to 'board/trab/trab.c')
| -rw-r--r-- | board/trab/trab.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/board/trab/trab.c b/board/trab/trab.c index 111c861..e3e8553 100644 --- a/board/trab/trab.c +++ b/board/trab/trab.c @@ -30,6 +30,13 @@ /* ------------------------------------------------------------------------- */ +#ifdef CFG_BRIGHTNESS +static void spi_init(void); +static void wait_transmit_done(void); +static void tsc2000_write(unsigned int page, unsigned int reg, + unsigned int data); +static void tsc2000_set_brightness(void); +#endif #ifdef CONFIG_MODEM_SUPPORT static int key_pressed(void); extern void disable_putc(void); @@ -104,6 +111,10 @@ int board_init () /* adress of boot parameters */ gd->bd->bi_boot_params = 0x0c000100; + /* Make sure both buzzers are turned off */ + rPDCON |= 0x5400; + rPDDAT &= ~0xE0; + #ifdef CONFIG_VFD vfd_init_clocks(); #endif /* CONFIG_VFD */ @@ -164,6 +175,9 @@ int misc_init_r (void) free (str); } +#ifdef CFG_BRIGHTNESS + tsc2000_set_brightness(); +#endif return (0); } @@ -288,3 +302,74 @@ static int key_pressed(void) return (compare_magic(KBD_DATA, CONFIG_MODEM_KEY_MAGIC) == 0); } #endif /* CONFIG_MODEM_SUPPORT */ + +#ifdef CFG_BRIGHTNESS + +#define SET_CS_TOUCH (rPDDAT &= 0x5FF) +#define CLR_CS_TOUCH (rPDDAT |= 0x200) + +static void spi_init(void) +{ + int i; + + /* Configure I/O ports. */ + rPDCON = (rPDCON & 0xF3FFFF) | 0x040000; + rPGCON = (rPGCON & 0x0F3FFF) | 0x008000; + rPGCON = (rPGCON & 0x0CFFFF) | 0x020000; + rPGCON = (rPGCON & 0x03FFFF) | 0x080000; + + CLR_CS_TOUCH; + + rSPPRE = 0x1F; /* Baudrate ca. 514kHz */ + rSPPIN = 0x01; /* SPI-MOSI holds Level after last bit */ + rSPCON = 0x1A; /* Polling, Prescaler, Master, CPOL=0, CPHA=1 */ + + /* Dummy byte ensures clock to be low. */ + for (i = 0; i < 10; i++) { + rSPTDAT = 0xFF; + } +} + +static void wait_transmit_done(void) +{ + while (!(rSPSTA & 0x01)); /* wait until transfer is done */ +} + +static void tsc2000_write(unsigned int page, unsigned int reg, + unsigned int data) +{ + unsigned int command; + + SET_CS_TOUCH; + command = 0x0000; + command |= (page << 11); + command |= (reg << 5); + + rSPTDAT = (command & 0xFF00) >> 8; + wait_transmit_done(); + rSPTDAT = (command & 0x00FF); + wait_transmit_done(); + rSPTDAT = (data & 0xFF00) >> 8; + wait_transmit_done(); + rSPTDAT = (data & 0x00FF); + wait_transmit_done(); + + CLR_CS_TOUCH; +} + +static void tsc2000_set_brightness(void) +{ + uchar tmp[10]; + int i, br; + + spi_init(); + tsc2000_write(1, 2, 0x0); /* Power up DAC */ + + i = getenv_r("brightness", tmp, sizeof(tmp)); + br = (i > 0) + ? (int) simple_strtoul (tmp, NULL, 10) + : CFG_BRIGHTNESS; + + tsc2000_write(0, 0xb, br & 0xff); +} +#endif |