1 /* 2 * ld9040 AMOLED LCD panel driver. 3 * 4 * Copyright (C) 2012 Samsung Electronics 5 * Donghwa Lee <dh09.lee@samsung.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <spi.h> 12 13 static const unsigned char SEQ_USER_SETTING[] = { 14 0xF0, 0x5A, 0x5A 15 }; 16 17 static const unsigned char SEQ_ELVSS_ON[] = { 18 0xB1, 0x0D, 0x00, 0x16, 19 }; 20 21 static const unsigned char SEQ_GTCON[] = { 22 0xF7, 0x09, 0x00, 0x00, 23 }; 24 25 static const unsigned char SEQ_PANEL_CONDITION[] = { 26 0xF8, 0x05, 0x65, 0x96, 0x71, 0x7D, 0x19, 0x3B, 27 0x0D, 0x19, 0x7E, 0x0D, 0xE2, 0x00, 0x00, 0x7E, 28 0x7D, 0x07, 0x07, 0x20, 0x20, 0x20, 0x02, 0x02, 29 }; 30 31 static const unsigned char SEQ_GAMMA_SET1[] = { 32 0xF9, 0x00, 0xA7, 0xB4, 0xAE, 0xBF, 0x00, 0x91, 33 0x00, 0xB2, 0xB4, 0xAA, 0xBB, 0x00, 0xAC, 0x00, 34 0xB3, 0xB1, 0xAA, 0xBC, 0x00, 0xB3, 35 }; 36 37 static const unsigned char SEQ_GAMMA_CTRL[] = { 38 0xFB, 0x02, 0x5A, 39 }; 40 41 static const unsigned char SEQ_DISPCTL[] = { 42 0xF2, 0x02, 0x08, 0x08, 0x10, 0x10, 43 }; 44 45 static const unsigned char SEQ_MANPWR[] = { 46 0xB0, 0x04, 47 }; 48 49 static const unsigned char SEQ_PWR_CTRL[] = { 50 0xF4, 0x0A, 0x87, 0x25, 0x6A, 0x44, 0x02, 0x88, 51 }; 52 53 static const unsigned char SEQ_SLPOUT[] = { 54 0x11, 55 }; 56 57 static const unsigned char SEQ_DISPON[] = { 58 0x29, 59 }; 60 61 static const unsigned char SEQ_DISPOFF[] = { 62 0x28, 63 }; 64 65 static void ld9040_spi_write(const unsigned char *wbuf, unsigned int size_cmd) 66 { 67 int i = 0; 68 69 /* 70 * Data are transmitted in 9-bit words: 71 * the first bit is command/parameter, the other are the value. 72 * The value's LSB is shifted to MSB position, to be sent as 9th bit 73 */ 74 75 unsigned int data_out = 0, data_in = 0; 76 for (i = 0; i < size_cmd; i++) { 77 data_out = wbuf[i] >> 1; 78 if (i != 0) 79 data_out += 0x0080; 80 if (wbuf[i] & 0x01) 81 data_out += 0x8000; 82 spi_xfer(NULL, 9, &data_out, &data_in, SPI_XFER_BEGIN); 83 } 84 } 85 86 void ld9040_cfg_ldo(void) 87 { 88 udelay(10); 89 90 ld9040_spi_write(SEQ_USER_SETTING, 91 ARRAY_SIZE(SEQ_USER_SETTING)); 92 ld9040_spi_write(SEQ_PANEL_CONDITION, 93 ARRAY_SIZE(SEQ_PANEL_CONDITION)); 94 ld9040_spi_write(SEQ_DISPCTL, ARRAY_SIZE(SEQ_DISPCTL)); 95 ld9040_spi_write(SEQ_MANPWR, ARRAY_SIZE(SEQ_MANPWR)); 96 ld9040_spi_write(SEQ_PWR_CTRL, ARRAY_SIZE(SEQ_PWR_CTRL)); 97 ld9040_spi_write(SEQ_ELVSS_ON, ARRAY_SIZE(SEQ_ELVSS_ON)); 98 ld9040_spi_write(SEQ_GTCON, ARRAY_SIZE(SEQ_GTCON)); 99 ld9040_spi_write(SEQ_GAMMA_SET1, ARRAY_SIZE(SEQ_GAMMA_SET1)); 100 ld9040_spi_write(SEQ_GAMMA_CTRL, ARRAY_SIZE(SEQ_GAMMA_CTRL)); 101 ld9040_spi_write(SEQ_SLPOUT, ARRAY_SIZE(SEQ_SLPOUT)); 102 103 udelay(120); 104 } 105 106 void ld9040_enable_ldo(unsigned int onoff) 107 { 108 if (onoff) 109 ld9040_spi_write(SEQ_DISPON, ARRAY_SIZE(SEQ_DISPON)); 110 else 111 ld9040_spi_write(SEQ_DISPOFF, ARRAY_SIZE(SEQ_DISPOFF)); 112 } 113