diff options
Diffstat (limited to 'drivers/video/ld9040.c')
| -rw-r--r-- | drivers/video/ld9040.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/video/ld9040.c b/drivers/video/ld9040.c new file mode 100644 index 00000000000..c01ae12bbca --- /dev/null +++ b/drivers/video/ld9040.c @@ -0,0 +1,144 @@ +/* + * ld9040 AMOLED LCD panel driver. + * + * Copyright (C) 2012 Samsung Electronics + * Donghwa Lee <dh09.lee@samsung.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <spi.h> + +static const unsigned char SEQ_SWRESET[] = { + 0x01, +}; + +static const unsigned char SEQ_USER_SETTING[] = { + 0xF0, 0x5A, 0x5A +}; + +static const unsigned char SEQ_ELVSS_ON[] = { + 0xB1, 0x0D, 0x00, 0x16, +}; + +static const unsigned char SEQ_TEMP_SWIRE[] = { + 0xB2, 0x06, 0x06, 0x06, 0x06, +}; + +static const unsigned char SEQ_GTCON[] = { + 0xF7, 0x09, 0x00, 0x00, +}; + +static const unsigned char SEQ_PANEL_CONDITION[] = { + 0xF8, 0x05, 0x65, 0x96, 0x71, 0x7D, 0x19, 0x3B, + 0x0D, 0x19, 0x7E, 0x0D, 0xE2, 0x00, 0x00, 0x7E, + 0x7D, 0x07, 0x07, 0x20, 0x20, 0x20, 0x02, 0x02, +}; + +static const unsigned char SEQ_GAMMA_SET1[] = { + 0xF9, 0x00, 0xA7, 0xB4, 0xAE, 0xBF, 0x00, 0x91, + 0x00, 0xB2, 0xB4, 0xAA, 0xBB, 0x00, 0xAC, 0x00, + 0xB3, 0xB1, 0xAA, 0xBC, 0x00, 0xB3, +}; + +static const unsigned char SEQ_GAMMA_CTRL[] = { + 0xFB, 0x02, 0x5A, +}; + +static const unsigned char SEQ_APON[] = { + 0xF3, 0x00, 0x00, 0x00, 0x0A, 0x02, +}; + +static const unsigned char SEQ_DISPCTL[] = { + 0xF2, 0x02, 0x08, 0x08, 0x10, 0x10, +}; + +static const unsigned char SEQ_MANPWR[] = { + 0xB0, 0x04, +}; + +static const unsigned char SEQ_PWR_CTRL[] = { + 0xF4, 0x0A, 0x87, 0x25, 0x6A, 0x44, 0x02, 0x88, +}; + +static const unsigned char SEQ_SLPOUT[] = { + 0x11, +}; + +static const unsigned char SEQ_SLPIN[] = { + 0x10, +}; + +static const unsigned char SEQ_DISPON[] = { + 0x29, +}; + +static const unsigned char SEQ_DISPOFF[] = { + 0x28, +}; + +static void ld9040_spi_write(const unsigned char *wbuf, unsigned int size_cmd) +{ + int i = 0; + + /* + * Data are transmitted in 9-bit words: + * the first bit is command/parameter, the other are the value. + * The value's LSB is shifted to MSB position, to be sent as 9th bit + */ + + unsigned int data_out = 0, data_in = 0; + for (i = 0; i < size_cmd; i++) { + data_out = wbuf[i] >> 1; + if (i != 0) + data_out += 0x0080; + if (wbuf[i] & 0x01) + data_out += 0x8000; + spi_xfer(NULL, 9, &data_out, &data_in, SPI_XFER_BEGIN); + } +} + +void ld9040_cfg_ldo(void) +{ + udelay(10); + + ld9040_spi_write(SEQ_USER_SETTING, + ARRAY_SIZE(SEQ_USER_SETTING)); + ld9040_spi_write(SEQ_PANEL_CONDITION, + ARRAY_SIZE(SEQ_PANEL_CONDITION)); + ld9040_spi_write(SEQ_DISPCTL, ARRAY_SIZE(SEQ_DISPCTL)); + ld9040_spi_write(SEQ_MANPWR, ARRAY_SIZE(SEQ_MANPWR)); + ld9040_spi_write(SEQ_PWR_CTRL, ARRAY_SIZE(SEQ_PWR_CTRL)); + ld9040_spi_write(SEQ_ELVSS_ON, ARRAY_SIZE(SEQ_ELVSS_ON)); + ld9040_spi_write(SEQ_GTCON, ARRAY_SIZE(SEQ_GTCON)); + ld9040_spi_write(SEQ_GAMMA_SET1, ARRAY_SIZE(SEQ_GAMMA_SET1)); + ld9040_spi_write(SEQ_GAMMA_CTRL, ARRAY_SIZE(SEQ_GAMMA_CTRL)); + ld9040_spi_write(SEQ_SLPOUT, ARRAY_SIZE(SEQ_SLPOUT)); + + udelay(120); +} + +void ld9040_enable_ldo(unsigned int onoff) +{ + if (onoff) + ld9040_spi_write(SEQ_DISPON, ARRAY_SIZE(SEQ_DISPON)); + else + ld9040_spi_write(SEQ_DISPOFF, ARRAY_SIZE(SEQ_DISPOFF)); +} |