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