diff options
Diffstat (limited to 'common/wmt_display/devices/lcd-setup.c')
| -rwxr-xr-x | common/wmt_display/devices/lcd-setup.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/common/wmt_display/devices/lcd-setup.c b/common/wmt_display/devices/lcd-setup.c new file mode 100755 index 0000000..6653fdc --- /dev/null +++ b/common/wmt_display/devices/lcd-setup.c @@ -0,0 +1,212 @@ +/* + * ========================================================================== + * + * Filename: lcd-spi.c + * + * Description: + * + * Version: 0.01 + * Created: Thursday, December 27, 2012 02:50:05 HKT + * + * Author: Sam Mei (), + * Company: + * + * ========================================================================== + */ + +#include <common.h> +#include <command.h> +#include <asm/types.h> +#include <asm/errno.h> +#include <asm/byteorder.h> + +#include "../../../board/wmt/include/wmt_spi.h" +#include "../../../board/wmt/include/wmt_iomux.h" + +#include "../lcd.h" + +#define CHIPSELECT 0 + +#ifndef SPI_GPIO +static void spi_ctrl_9bit_tx(u8 val, int cmd_data) +{ + uint8_t buf[2],rbuf[2]; + + if (cmd_data) + buf[0] = (val >> 1) | BIT7; + else + buf[0] = (val >> 1) & 0x7f; + + buf[1] = (val << 7); + + spi_write_then_read_data(buf, rbuf, sizeof(buf), SPI_MODE_1, CHIPSELECT); +} + +#else + +#define CLK WMT_PIN_GP12_SPI0CLK +#define MOSI WMT_PIN_GP12_SPI0MOSI +#define MISO WMT_PIN_GP12_SPI0MISO +#define SS WMT_PIN_GP12_SPI0SS0 + +static void spi_gpio_9bit_tx(u8 val, int cmd_data) +{ + int i; + + // CS + gpio_direction_output(SS, 1); + gpio_direction_output(SS, 0); + + // D/C + gpio_direction_output(MOSI, cmd_data); + gpio_direction_output(CLK, 0); + gpio_direction_output(CLK, 1); + + // 8-bit value + for (i = 7; i >= 0; i--) { + gpio_direction_output(MOSI, !!(val & (1 << i))); + gpio_direction_output(CLK, 0); + gpio_direction_output(CLK, 1); + } + + // CS + gpio_direction_output(SS, 1); +} +#endif + +static inline void spi_9bit_tx(u8 val, int cmd_data) +{ +#ifdef SPI_GPIO + spi_gpio_9bit_tx(val, cmd_data); +#else + spi_ctrl_9bit_tx(val, cmd_data); +#endif +} + +static int ts8224b_cmd(u8 cmd) +{ + spi_9bit_tx(cmd, 0); + return 0; +} + +static int ts8224b_data(u8 data) +{ + spi_9bit_tx(data, 1); + return 0; +} + +/* + * setenv wmt.lcd.setup 0 + * setenv wmt.display.param 2:0:24:1024:600:60 + * setenv wmt.display.tmr 30000:0:78:78:480:78:4:60:800:60 + */ +static int ts8224b_init(void) +{ + + static uint16_t settings[] = { + #include "ts8224b.h" + }; + int i; + + printf(" ## %s \n", __FUNCTION__); + for (i = 0; i < ARRAY_SIZE(settings); i += 2) { + ts8224b_cmd(settings[i] >> 8); + ts8224b_data(settings[i+1]); + } + + ts8224b_cmd(0x11); + mdelay(120); + + ts8224b_cmd(0x29); + mdelay(50); + ts8224b_cmd(0x2c); + return 0; +} + +static int i2c_write(int i2c_idx, uint8_t reg, uint8_t value) +{ + unsigned char data[2] = { reg, value }; + struct i2c_msg_s msg[1] = { + { + .addr = 0xE0 >> 1, + .flags = I2C_M_WR, + .len = 2, + .buf = data, + }, + }; + + if (wmt_i2c_transfer(&msg[0], 1, i2c_idx) > 0) + return 0; + + printf(" ## lcd i2c1 write error %s, %d\n", __func__, __LINE__); + return -1; +} + +static uint8_t init_data[] = { + 0x4b, 0x01, + 0x0c, 0x01, + 0x05, 0x03, + 0x41, 0x03, + 0x10, 0x06, + 0x11, 0xE0, + 0x12, 0x00, + 0x13, 0x3C, + 0x14, 0x06, + 0x15, 0x40, + 0x16, 0x03, + 0x17, 0x9E, + 0x18, 0x00, + 0x19, 0x10, + 0x1a, 0x03, + 0x1b, 0x84, + 0x1c, 0x80, + 0x1d, 0x0A, + 0x1e, 0x80, + 0x1f, 0x06, + 0x3c, 0x17, + 0x3e, 0x16, + 0x36, 0x00, + 0x31, 0x00, + 0x35, 0x41, + 0x30, 0xB0, + 0x30, 0xB1, + 0x00, 0x0B, +}; + +static int chunghwa_init(void) +{ + int i; + + printf(" ## %s, %d\n", __FUNCTION__, __LINE__); + for (i = 0; i < ARRAY_SIZE(init_data); i += 2) { + i2c_write(1, init_data[i], init_data[i+1]); + } + + return 0; +} + +enum { + LCD_SETUP_TS8224B, + LCD_SETUP_CHUNGHWA, + LCD_SETUP_MAX, +}; + +int lcd_spi_setup(void) +{ + int id; + char *s = getenv("wmt.lcd.setup"); + + if (!s) + return -ENODEV; + + id = simple_strtoul(s, NULL, 10); + switch (id) { + case LCD_SETUP_TS8224B: + return ts8224b_init(); + case LCD_SETUP_CHUNGHWA: + return chunghwa_init(); + default: + return -EINVAL; + } +} + |