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5036cc41 MV |
1 | /* |
2 | * lms283gf05.c -- support for Samsung LMS283GF05 LCD | |
3 | * | |
4 | * Copyright (c) 2009 Marek Vasut <marek.vasut@gmail.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/device.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/delay.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
5036cc41 MV |
15 | #include <linux/gpio.h> |
16 | #include <linux/lcd.h> | |
17 | ||
18 | #include <linux/spi/spi.h> | |
19 | #include <linux/spi/lms283gf05.h> | |
355b200b | 20 | #include <linux/module.h> |
5036cc41 MV |
21 | |
22 | struct lms283gf05_state { | |
23 | struct spi_device *spi; | |
24 | struct lcd_device *ld; | |
25 | }; | |
26 | ||
27 | struct lms283gf05_seq { | |
28 | unsigned char reg; | |
29 | unsigned short value; | |
30 | unsigned char delay; | |
31 | }; | |
32 | ||
33 | /* Magic sequences supplied by manufacturer, for details refer to datasheet */ | |
c22e61b3 | 34 | static const struct lms283gf05_seq disp_initseq[] = { |
5036cc41 MV |
35 | /* REG, VALUE, DELAY */ |
36 | { 0x07, 0x0000, 0 }, | |
37 | { 0x13, 0x0000, 10 }, | |
38 | ||
39 | { 0x11, 0x3004, 0 }, | |
40 | { 0x14, 0x200F, 0 }, | |
41 | { 0x10, 0x1a20, 0 }, | |
42 | { 0x13, 0x0040, 50 }, | |
43 | ||
44 | { 0x13, 0x0060, 0 }, | |
45 | { 0x13, 0x0070, 200 }, | |
46 | ||
47 | { 0x01, 0x0127, 0 }, | |
48 | { 0x02, 0x0700, 0 }, | |
49 | { 0x03, 0x1030, 0 }, | |
50 | { 0x08, 0x0208, 0 }, | |
51 | { 0x0B, 0x0620, 0 }, | |
52 | { 0x0C, 0x0110, 0 }, | |
53 | { 0x30, 0x0120, 0 }, | |
54 | { 0x31, 0x0127, 0 }, | |
55 | { 0x32, 0x0000, 0 }, | |
56 | { 0x33, 0x0503, 0 }, | |
57 | { 0x34, 0x0727, 0 }, | |
58 | { 0x35, 0x0124, 0 }, | |
59 | { 0x36, 0x0706, 0 }, | |
60 | { 0x37, 0x0701, 0 }, | |
61 | { 0x38, 0x0F00, 0 }, | |
62 | { 0x39, 0x0F00, 0 }, | |
63 | { 0x40, 0x0000, 0 }, | |
64 | { 0x41, 0x0000, 0 }, | |
65 | { 0x42, 0x013f, 0 }, | |
66 | { 0x43, 0x0000, 0 }, | |
67 | { 0x44, 0x013f, 0 }, | |
68 | { 0x45, 0x0000, 0 }, | |
69 | { 0x46, 0xef00, 0 }, | |
70 | { 0x47, 0x013f, 0 }, | |
71 | { 0x48, 0x0000, 0 }, | |
72 | { 0x07, 0x0015, 30 }, | |
73 | ||
74 | { 0x07, 0x0017, 0 }, | |
75 | ||
76 | { 0x20, 0x0000, 0 }, | |
77 | { 0x21, 0x0000, 0 }, | |
78 | { 0x22, 0x0000, 0 } | |
79 | }; | |
80 | ||
c22e61b3 | 81 | static const struct lms283gf05_seq disp_pdwnseq[] = { |
5036cc41 MV |
82 | { 0x07, 0x0016, 30 }, |
83 | ||
84 | { 0x07, 0x0004, 0 }, | |
85 | { 0x10, 0x0220, 20 }, | |
86 | ||
87 | { 0x13, 0x0060, 50 }, | |
88 | ||
89 | { 0x13, 0x0040, 50 }, | |
90 | ||
91 | { 0x13, 0x0000, 0 }, | |
92 | { 0x10, 0x0000, 0 } | |
93 | }; | |
94 | ||
95 | ||
96 | static void lms283gf05_reset(unsigned long gpio, bool inverted) | |
97 | { | |
98 | gpio_set_value(gpio, !inverted); | |
99 | mdelay(100); | |
100 | gpio_set_value(gpio, inverted); | |
101 | mdelay(20); | |
102 | gpio_set_value(gpio, !inverted); | |
103 | mdelay(20); | |
104 | } | |
105 | ||
106 | static void lms283gf05_toggle(struct spi_device *spi, | |
c22e61b3 | 107 | const struct lms283gf05_seq *seq, int sz) |
5036cc41 MV |
108 | { |
109 | char buf[3]; | |
110 | int i; | |
111 | ||
112 | for (i = 0; i < sz; i++) { | |
113 | buf[0] = 0x74; | |
114 | buf[1] = 0x00; | |
115 | buf[2] = seq[i].reg; | |
116 | spi_write(spi, buf, 3); | |
117 | ||
118 | buf[0] = 0x76; | |
119 | buf[1] = seq[i].value >> 8; | |
120 | buf[2] = seq[i].value & 0xff; | |
121 | spi_write(spi, buf, 3); | |
122 | ||
123 | mdelay(seq[i].delay); | |
124 | } | |
125 | } | |
126 | ||
127 | static int lms283gf05_power_set(struct lcd_device *ld, int power) | |
128 | { | |
129 | struct lms283gf05_state *st = lcd_get_data(ld); | |
130 | struct spi_device *spi = st->spi; | |
c512794c | 131 | struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev); |
5036cc41 | 132 | |
6bde9082 | 133 | if (power <= FB_BLANK_NORMAL) { |
5036cc41 MV |
134 | if (pdata) |
135 | lms283gf05_reset(pdata->reset_gpio, | |
136 | pdata->reset_inverted); | |
137 | lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq)); | |
138 | } else { | |
139 | lms283gf05_toggle(spi, disp_pdwnseq, ARRAY_SIZE(disp_pdwnseq)); | |
140 | if (pdata) | |
141 | gpio_set_value(pdata->reset_gpio, | |
142 | pdata->reset_inverted); | |
143 | } | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | static struct lcd_ops lms_ops = { | |
149 | .set_power = lms283gf05_power_set, | |
150 | .get_power = NULL, | |
151 | }; | |
152 | ||
1b9e450d | 153 | static int lms283gf05_probe(struct spi_device *spi) |
5036cc41 MV |
154 | { |
155 | struct lms283gf05_state *st; | |
c512794c | 156 | struct lms283gf05_pdata *pdata = dev_get_platdata(&spi->dev); |
5036cc41 MV |
157 | struct lcd_device *ld; |
158 | int ret = 0; | |
159 | ||
160 | if (pdata != NULL) { | |
5a5a0743 | 161 | ret = devm_gpio_request_one(&spi->dev, pdata->reset_gpio, |
1eddd977 JH |
162 | GPIOF_DIR_OUT | (!pdata->reset_inverted ? |
163 | GPIOF_INIT_HIGH : GPIOF_INIT_LOW), | |
5a5a0743 | 164 | "LMS285GF05 RESET"); |
5036cc41 | 165 | if (ret) |
04e961fb | 166 | return ret; |
5036cc41 MV |
167 | } |
168 | ||
26f2b35c JH |
169 | st = devm_kzalloc(&spi->dev, sizeof(struct lms283gf05_state), |
170 | GFP_KERNEL); | |
e1094f9f | 171 | if (st == NULL) |
04e961fb | 172 | return -ENOMEM; |
5036cc41 | 173 | |
0a1c55d0 JH |
174 | ld = devm_lcd_device_register(&spi->dev, "lms283gf05", &spi->dev, st, |
175 | &lms_ops); | |
04e961fb JH |
176 | if (IS_ERR(ld)) |
177 | return PTR_ERR(ld); | |
5036cc41 MV |
178 | |
179 | st->spi = spi; | |
180 | st->ld = ld; | |
181 | ||
b936fab0 | 182 | spi_set_drvdata(spi, st); |
5036cc41 MV |
183 | |
184 | /* kick in the LCD */ | |
185 | if (pdata) | |
186 | lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted); | |
187 | lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq)); | |
188 | ||
189 | return 0; | |
5036cc41 MV |
190 | } |
191 | ||
5036cc41 MV |
192 | static struct spi_driver lms283gf05_driver = { |
193 | .driver = { | |
194 | .name = "lms283gf05", | |
5036cc41 MV |
195 | }, |
196 | .probe = lms283gf05_probe, | |
5036cc41 MV |
197 | }; |
198 | ||
462dd838 | 199 | module_spi_driver(lms283gf05_driver); |
5036cc41 MV |
200 | |
201 | MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); | |
202 | MODULE_DESCRIPTION("LCD283GF05 LCD"); | |
203 | MODULE_LICENSE("GPL v2"); |