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
ld9040_spi_write(const unsigned char * wbuf,unsigned int size_cmd)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
ld9040_cfg_ldo(void)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
ld9040_enable_ldo(unsigned int onoff)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