* Patches by David Müller, 31 Jan 2003:
- minimal setup for CardBus bridges
- add EEPROM read/write support in the CS8900 driver
- add support for the builtin I2C controller in the Samsung s3c24x0 chips
- add support for MPL's VCMA9 (Samsung s3c2410 based) board
* Patch by Steven Scholz, 04 Feb 2003:
add support for RTC DS1307
* Patch by Reinhard Meyer, 5 Feb 2003:
fix PLPRCR/SCCR init sequence on 8xx to allow for
changes of EBDF by software
* Patch by Vladimir Gurevich, 07 Feb 2003:
"API-compatibility patch" for 4xx I2C driver
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 @@
/* 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 @@
free (str);
}
+#ifdef CFG_BRIGHTNESS
+ tsc2000_set_brightness();
+#endif
return (0);
}
@@ -288,3 +302,74 @@
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