1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * ld9040 AMOLED LCD panel driver.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (C) 2012 Samsung Electronics
5*4882a593Smuzhiyun * Donghwa Lee <dh09.lee@samsung.com>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <common.h>
11*4882a593Smuzhiyun #include <spi.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun static const unsigned char SEQ_USER_SETTING[] = {
14*4882a593Smuzhiyun 0xF0, 0x5A, 0x5A
15*4882a593Smuzhiyun };
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun static const unsigned char SEQ_ELVSS_ON[] = {
18*4882a593Smuzhiyun 0xB1, 0x0D, 0x00, 0x16,
19*4882a593Smuzhiyun };
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun static const unsigned char SEQ_GTCON[] = {
22*4882a593Smuzhiyun 0xF7, 0x09, 0x00, 0x00,
23*4882a593Smuzhiyun };
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun static const unsigned char SEQ_PANEL_CONDITION[] = {
26*4882a593Smuzhiyun 0xF8, 0x05, 0x65, 0x96, 0x71, 0x7D, 0x19, 0x3B,
27*4882a593Smuzhiyun 0x0D, 0x19, 0x7E, 0x0D, 0xE2, 0x00, 0x00, 0x7E,
28*4882a593Smuzhiyun 0x7D, 0x07, 0x07, 0x20, 0x20, 0x20, 0x02, 0x02,
29*4882a593Smuzhiyun };
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun static const unsigned char SEQ_GAMMA_SET1[] = {
32*4882a593Smuzhiyun 0xF9, 0x00, 0xA7, 0xB4, 0xAE, 0xBF, 0x00, 0x91,
33*4882a593Smuzhiyun 0x00, 0xB2, 0xB4, 0xAA, 0xBB, 0x00, 0xAC, 0x00,
34*4882a593Smuzhiyun 0xB3, 0xB1, 0xAA, 0xBC, 0x00, 0xB3,
35*4882a593Smuzhiyun };
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun static const unsigned char SEQ_GAMMA_CTRL[] = {
38*4882a593Smuzhiyun 0xFB, 0x02, 0x5A,
39*4882a593Smuzhiyun };
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun static const unsigned char SEQ_DISPCTL[] = {
42*4882a593Smuzhiyun 0xF2, 0x02, 0x08, 0x08, 0x10, 0x10,
43*4882a593Smuzhiyun };
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun static const unsigned char SEQ_MANPWR[] = {
46*4882a593Smuzhiyun 0xB0, 0x04,
47*4882a593Smuzhiyun };
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun static const unsigned char SEQ_PWR_CTRL[] = {
50*4882a593Smuzhiyun 0xF4, 0x0A, 0x87, 0x25, 0x6A, 0x44, 0x02, 0x88,
51*4882a593Smuzhiyun };
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun static const unsigned char SEQ_SLPOUT[] = {
54*4882a593Smuzhiyun 0x11,
55*4882a593Smuzhiyun };
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun static const unsigned char SEQ_DISPON[] = {
58*4882a593Smuzhiyun 0x29,
59*4882a593Smuzhiyun };
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun static const unsigned char SEQ_DISPOFF[] = {
62*4882a593Smuzhiyun 0x28,
63*4882a593Smuzhiyun };
64*4882a593Smuzhiyun
ld9040_spi_write(const unsigned char * wbuf,unsigned int size_cmd)65*4882a593Smuzhiyun static void ld9040_spi_write(const unsigned char *wbuf, unsigned int size_cmd)
66*4882a593Smuzhiyun {
67*4882a593Smuzhiyun int i = 0;
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun /*
70*4882a593Smuzhiyun * Data are transmitted in 9-bit words:
71*4882a593Smuzhiyun * the first bit is command/parameter, the other are the value.
72*4882a593Smuzhiyun * The value's LSB is shifted to MSB position, to be sent as 9th bit
73*4882a593Smuzhiyun */
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun unsigned int data_out = 0, data_in = 0;
76*4882a593Smuzhiyun for (i = 0; i < size_cmd; i++) {
77*4882a593Smuzhiyun data_out = wbuf[i] >> 1;
78*4882a593Smuzhiyun if (i != 0)
79*4882a593Smuzhiyun data_out += 0x0080;
80*4882a593Smuzhiyun if (wbuf[i] & 0x01)
81*4882a593Smuzhiyun data_out += 0x8000;
82*4882a593Smuzhiyun spi_xfer(NULL, 9, &data_out, &data_in, SPI_XFER_BEGIN);
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
ld9040_cfg_ldo(void)86*4882a593Smuzhiyun void ld9040_cfg_ldo(void)
87*4882a593Smuzhiyun {
88*4882a593Smuzhiyun udelay(10);
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun ld9040_spi_write(SEQ_USER_SETTING,
91*4882a593Smuzhiyun ARRAY_SIZE(SEQ_USER_SETTING));
92*4882a593Smuzhiyun ld9040_spi_write(SEQ_PANEL_CONDITION,
93*4882a593Smuzhiyun ARRAY_SIZE(SEQ_PANEL_CONDITION));
94*4882a593Smuzhiyun ld9040_spi_write(SEQ_DISPCTL, ARRAY_SIZE(SEQ_DISPCTL));
95*4882a593Smuzhiyun ld9040_spi_write(SEQ_MANPWR, ARRAY_SIZE(SEQ_MANPWR));
96*4882a593Smuzhiyun ld9040_spi_write(SEQ_PWR_CTRL, ARRAY_SIZE(SEQ_PWR_CTRL));
97*4882a593Smuzhiyun ld9040_spi_write(SEQ_ELVSS_ON, ARRAY_SIZE(SEQ_ELVSS_ON));
98*4882a593Smuzhiyun ld9040_spi_write(SEQ_GTCON, ARRAY_SIZE(SEQ_GTCON));
99*4882a593Smuzhiyun ld9040_spi_write(SEQ_GAMMA_SET1, ARRAY_SIZE(SEQ_GAMMA_SET1));
100*4882a593Smuzhiyun ld9040_spi_write(SEQ_GAMMA_CTRL, ARRAY_SIZE(SEQ_GAMMA_CTRL));
101*4882a593Smuzhiyun ld9040_spi_write(SEQ_SLPOUT, ARRAY_SIZE(SEQ_SLPOUT));
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun udelay(120);
104*4882a593Smuzhiyun }
105*4882a593Smuzhiyun
ld9040_enable_ldo(unsigned int onoff)106*4882a593Smuzhiyun void ld9040_enable_ldo(unsigned int onoff)
107*4882a593Smuzhiyun {
108*4882a593Smuzhiyun if (onoff)
109*4882a593Smuzhiyun ld9040_spi_write(SEQ_DISPON, ARRAY_SIZE(SEQ_DISPON));
110*4882a593Smuzhiyun else
111*4882a593Smuzhiyun ld9040_spi_write(SEQ_DISPOFF, ARRAY_SIZE(SEQ_DISPOFF));
112*4882a593Smuzhiyun }
113