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-rw-r--r--firmware/target/arm/s5l8700/meizu-m6sl/lcd-m6sl.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/firmware/target/arm/s5l8700/meizu-m6sl/lcd-m6sl.c b/firmware/target/arm/s5l8700/meizu-m6sl/lcd-m6sl.c
index 1affab3b01..567023d35e 100644
--- a/firmware/target/arm/s5l8700/meizu-m6sl/lcd-m6sl.c
+++ b/firmware/target/arm/s5l8700/meizu-m6sl/lcd-m6sl.c
@@ -29,6 +29,110 @@
/*** definitions ***/
+#define SPIDELAY(_x) void(_x);
+
+#define SETMOSI() (PDAT4 |= (1 << 3))
+#define CLRMOSI() (PDAT4 &= ~(1 << 3))
+
+#define MISO ((PDAT1 >> 1) & 1)
+
+#define SETCLK() (PDAT4 |= (1 << 2))
+#define CLRCLK() (PDAT4 &= ~(1 << 2))
+
+#define SETSS() (PDAT7 |= (1 << 1))
+#define CLRSS() (PDAT7 &= ~(1 << 1))
+
+void init_lcd_spi(void)
+{
+ int oldval;
+
+ oldval = PCON1;
+ //Set P1.1 to input
+ PCON1 = ((oldval & ~(0xf << 4)));
+
+ oldval = PCON4;
+ //Set P4.2 and 4.3 to output
+ PCON4 = ((oldval & ~(0xf << 8 | 0xf << 12)) | (1 << 8 | 1 << 12));
+
+ oldval = PCON4;
+ //Set P4.2 and 4.3 to output
+ PCON4 = ((oldval & ~(0xf << 8 | 0xf << 12)) | (1 << 8 | 1 << 12));
+
+ oldval = PCON7;
+ //Set P7.0 and 7.1 to output
+ PCON7 = ((oldval & ~(0xf << 0 | 0xf << 4)) | (1 << 0 | 1 << 4));
+
+ SETSS();
+ SETCLK();
+}
+
+static inline void delay(int duration)
+{
+ volatile int i;
+ for(i=0;i<duration;i++);
+}
+
+unsigned int lcd_spi_io(unsigned int output,unsigned int bits,unsigned int inskip)
+{
+ unsigned int input = 0;
+ unsigned int i;
+
+ //delay(10); // < 470 us
+
+ CLRSS();
+ //delay(13); // > 22 us
+
+ for (i = 0; i < bits+inskip; i++) {
+
+ CLRCLK();
+
+ if(i<bits)
+ {
+ if (output & (1 << (bits-1)))
+ SETMOSI();
+ else
+ CLRMOSI();
+ output <<= 1;
+ }
+ else
+ {
+ CLRMOSI();
+ }
+
+ //delay(20); // >> 6.7 us
+
+ SETCLK();
+
+ if(i>=inskip)
+ {
+ input <<= 1;
+ input |= MISO;
+ }
+
+ //delay(20); // >> 6.7 us
+ }
+
+ SETSS();
+
+ return (input);
+}
+
+
+void spi_set_reg(unsigned char reg,unsigned short value)
+{
+ lcd_spi_io(0x700000|reg,24,0); // possibly 0x74
+ lcd_spi_io(0x720000|value,24,0); // possibly 0x77
+}
+
+unsigned int lcd_read_id(void)
+{
+ unsigned int device_code;
+ lcd_spi_io(0x700000,24,0); // possibly 0x74
+
+ device_code=lcd_spi_io(0x7300,16,24); // possibly 0x77
+ return device_code;
+}
+
/** globals **/
static int xoffset; /* needed for flip */