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11#include <linux/device.h>
12#include <linux/kernel.h>
13#include <linux/delay.h>
14#include <linux/slab.h>
15#include <linux/gpio.h>
16#include <linux/lcd.h>
17
18#include <linux/spi/spi.h>
19#include <linux/spi/lms283gf05.h>
20#include <linux/module.h>
21
22struct lms283gf05_state {
23 struct spi_device *spi;
24 struct lcd_device *ld;
25};
26
27struct lms283gf05_seq {
28 unsigned char reg;
29 unsigned short value;
30 unsigned char delay;
31};
32
33
34static const struct lms283gf05_seq disp_initseq[] = {
35
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
81static const struct lms283gf05_seq disp_pdwnseq[] = {
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
96static 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
106static void lms283gf05_toggle(struct spi_device *spi,
107 const struct lms283gf05_seq *seq, int sz)
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
127static 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;
131 struct lms283gf05_pdata *pdata = spi->dev.platform_data;
132
133 if (power <= FB_BLANK_NORMAL) {
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
148static struct lcd_ops lms_ops = {
149 .set_power = lms283gf05_power_set,
150 .get_power = NULL,
151};
152
153static int lms283gf05_probe(struct spi_device *spi)
154{
155 struct lms283gf05_state *st;
156 struct lms283gf05_pdata *pdata = spi->dev.platform_data;
157 struct lcd_device *ld;
158 int ret = 0;
159
160 if (pdata != NULL) {
161 ret = devm_gpio_request_one(&spi->dev, pdata->reset_gpio,
162 GPIOF_DIR_OUT | (!pdata->reset_inverted ?
163 GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
164 "LMS285GF05 RESET");
165 if (ret)
166 return ret;
167 }
168
169 st = devm_kzalloc(&spi->dev, sizeof(struct lms283gf05_state),
170 GFP_KERNEL);
171 if (st == NULL) {
172 dev_err(&spi->dev, "No memory for device state\n");
173 return -ENOMEM;
174 }
175
176 ld = lcd_device_register("lms283gf05", &spi->dev, st, &lms_ops);
177 if (IS_ERR(ld))
178 return PTR_ERR(ld);
179
180 st->spi = spi;
181 st->ld = ld;
182
183 spi_set_drvdata(spi, st);
184
185
186 if (pdata)
187 lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted);
188 lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));
189
190 return 0;
191}
192
193static int lms283gf05_remove(struct spi_device *spi)
194{
195 struct lms283gf05_state *st = spi_get_drvdata(spi);
196
197 lcd_device_unregister(st->ld);
198
199 return 0;
200}
201
202static struct spi_driver lms283gf05_driver = {
203 .driver = {
204 .name = "lms283gf05",
205 .owner = THIS_MODULE,
206 },
207 .probe = lms283gf05_probe,
208 .remove = lms283gf05_remove,
209};
210
211module_spi_driver(lms283gf05_driver);
212
213MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
214MODULE_DESCRIPTION("LCD283GF05 LCD");
215MODULE_LICENSE("GPL v2");
216
