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11#include <linux/device.h>
12#include <linux/kernel.h>
13#include <linux/delay.h>
14#include <linux/gpio.h>
15#include <linux/lcd.h>
16
17#include <linux/spi/spi.h>
18#include <linux/spi/lms283gf05.h>
19
20struct lms283gf05_state {
21 struct spi_device *spi;
22 struct lcd_device *ld;
23};
24
25struct lms283gf05_seq {
26 unsigned char reg;
27 unsigned short value;
28 unsigned char delay;
29};
30
31
32static struct lms283gf05_seq disp_initseq[] = {
33
34 { 0x07, 0x0000, 0 },
35 { 0x13, 0x0000, 10 },
36
37 { 0x11, 0x3004, 0 },
38 { 0x14, 0x200F, 0 },
39 { 0x10, 0x1a20, 0 },
40 { 0x13, 0x0040, 50 },
41
42 { 0x13, 0x0060, 0 },
43 { 0x13, 0x0070, 200 },
44
45 { 0x01, 0x0127, 0 },
46 { 0x02, 0x0700, 0 },
47 { 0x03, 0x1030, 0 },
48 { 0x08, 0x0208, 0 },
49 { 0x0B, 0x0620, 0 },
50 { 0x0C, 0x0110, 0 },
51 { 0x30, 0x0120, 0 },
52 { 0x31, 0x0127, 0 },
53 { 0x32, 0x0000, 0 },
54 { 0x33, 0x0503, 0 },
55 { 0x34, 0x0727, 0 },
56 { 0x35, 0x0124, 0 },
57 { 0x36, 0x0706, 0 },
58 { 0x37, 0x0701, 0 },
59 { 0x38, 0x0F00, 0 },
60 { 0x39, 0x0F00, 0 },
61 { 0x40, 0x0000, 0 },
62 { 0x41, 0x0000, 0 },
63 { 0x42, 0x013f, 0 },
64 { 0x43, 0x0000, 0 },
65 { 0x44, 0x013f, 0 },
66 { 0x45, 0x0000, 0 },
67 { 0x46, 0xef00, 0 },
68 { 0x47, 0x013f, 0 },
69 { 0x48, 0x0000, 0 },
70 { 0x07, 0x0015, 30 },
71
72 { 0x07, 0x0017, 0 },
73
74 { 0x20, 0x0000, 0 },
75 { 0x21, 0x0000, 0 },
76 { 0x22, 0x0000, 0 }
77};
78
79static struct lms283gf05_seq disp_pdwnseq[] = {
80 { 0x07, 0x0016, 30 },
81
82 { 0x07, 0x0004, 0 },
83 { 0x10, 0x0220, 20 },
84
85 { 0x13, 0x0060, 50 },
86
87 { 0x13, 0x0040, 50 },
88
89 { 0x13, 0x0000, 0 },
90 { 0x10, 0x0000, 0 }
91};
92
93
94static void lms283gf05_reset(unsigned long gpio, bool inverted)
95{
96 gpio_set_value(gpio, !inverted);
97 mdelay(100);
98 gpio_set_value(gpio, inverted);
99 mdelay(20);
100 gpio_set_value(gpio, !inverted);
101 mdelay(20);
102}
103
104static void lms283gf05_toggle(struct spi_device *spi,
105 struct lms283gf05_seq *seq, int sz)
106{
107 char buf[3];
108 int i;
109
110 for (i = 0; i < sz; i++) {
111 buf[0] = 0x74;
112 buf[1] = 0x00;
113 buf[2] = seq[i].reg;
114 spi_write(spi, buf, 3);
115
116 buf[0] = 0x76;
117 buf[1] = seq[i].value >> 8;
118 buf[2] = seq[i].value & 0xff;
119 spi_write(spi, buf, 3);
120
121 mdelay(seq[i].delay);
122 }
123}
124
125static int lms283gf05_power_set(struct lcd_device *ld, int power)
126{
127 struct lms283gf05_state *st = lcd_get_data(ld);
128 struct spi_device *spi = st->spi;
129 struct lms283gf05_pdata *pdata = spi->dev.platform_data;
130
131 if (power) {
132 if (pdata)
133 lms283gf05_reset(pdata->reset_gpio,
134 pdata->reset_inverted);
135 lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));
136 } else {
137 lms283gf05_toggle(spi, disp_pdwnseq, ARRAY_SIZE(disp_pdwnseq));
138 if (pdata)
139 gpio_set_value(pdata->reset_gpio,
140 pdata->reset_inverted);
141 }
142
143 return 0;
144}
145
146static struct lcd_ops lms_ops = {
147 .set_power = lms283gf05_power_set,
148 .get_power = NULL,
149};
150
151static int __devinit lms283gf05_probe(struct spi_device *spi)
152{
153 struct lms283gf05_state *st;
154 struct lms283gf05_pdata *pdata = spi->dev.platform_data;
155 struct lcd_device *ld;
156 int ret = 0;
157
158 if (pdata != NULL) {
159 ret = gpio_request(pdata->reset_gpio, "LMS285GF05 RESET");
160 if (ret)
161 return ret;
162
163 ret = gpio_direction_output(pdata->reset_gpio,
164 !pdata->reset_inverted);
165 if (ret)
166 goto err;
167 }
168
169 st = kzalloc(sizeof(struct lms283gf05_state), GFP_KERNEL);
170 if (st == NULL) {
171 dev_err(&spi->dev, "No memory for device state\n");
172 ret = -ENOMEM;
173 goto err;
174 }
175
176 ld = lcd_device_register("lms283gf05", &spi->dev, st, &lms_ops);
177 if (IS_ERR(ld)) {
178 ret = PTR_ERR(ld);
179 goto err2;
180 }
181
182 st->spi = spi;
183 st->ld = ld;
184
185 dev_set_drvdata(&spi->dev, st);
186
187
188 if (pdata)
189 lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted);
190 lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq));
191
192 return 0;
193
194err2:
195 kfree(st);
196err:
197 if (pdata != NULL)
198 gpio_free(pdata->reset_gpio);
199
200 return ret;
201}
202
203static int __devexit lms283gf05_remove(struct spi_device *spi)
204{
205 struct lms283gf05_state *st = dev_get_drvdata(&spi->dev);
206 struct lms283gf05_pdata *pdata = st->spi->dev.platform_data;
207
208 lcd_device_unregister(st->ld);
209
210 if (pdata != NULL)
211 gpio_free(pdata->reset_gpio);
212
213 kfree(st);
214
215 return 0;
216}
217
218static struct spi_driver lms283gf05_driver = {
219 .driver = {
220 .name = "lms283gf05",
221 .owner = THIS_MODULE,
222 },
223 .probe = lms283gf05_probe,
224 .remove = __devexit_p(lms283gf05_remove),
225};
226
227static __init int lms283gf05_init(void)
228{
229 return spi_register_driver(&lms283gf05_driver);
230}
231
232static __exit void lms283gf05_exit(void)
233{
234 spi_unregister_driver(&lms283gf05_driver);
235}
236
237module_init(lms283gf05_init);
238module_exit(lms283gf05_exit);
239
240MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
241MODULE_DESCRIPTION("LCD283GF05 LCD");
242MODULE_LICENSE("GPL v2");
243
