// SPDX-License-Identifier: GPL-2.0+ /* * ld9040 AMOLED LCD panel driver. * * Copyright (C) 2012 Samsung Electronics * Donghwa Lee <dh09.lee@samsung.com> */ #include <common.h> #include <spi.h> 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_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_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_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)); }