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13#include <linux/backlight.h>
14#include <linux/delay.h>
15#include <linux/fb.h>
16#include <linux/gpio.h>
17#include <linux/lcd.h>
18#include <linux/module.h>
19#include <linux/spi/spi.h>
20#include <linux/wait.h>
21
22#define COMMAND_ONLY 0x00
23#define DATA_ONLY 0x01
24
25struct lms501kf03 {
26 struct device *dev;
27 struct spi_device *spi;
28 unsigned int power;
29 struct lcd_device *ld;
30 struct lcd_platform_data *lcd_pd;
31};
32
33static const unsigned char seq_password[] = {
34 0xb9, 0xff, 0x83, 0x69,
35};
36
37static const unsigned char seq_power[] = {
38 0xb1, 0x01, 0x00, 0x34, 0x06, 0x00, 0x14, 0x14, 0x20, 0x28,
39 0x12, 0x12, 0x17, 0x0a, 0x01, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6,
40};
41
42static const unsigned char seq_display[] = {
43 0xb2, 0x00, 0x2b, 0x03, 0x03, 0x70, 0x00, 0xff, 0x00, 0x00,
44 0x00, 0x00, 0x03, 0x03, 0x00, 0x01,
45};
46
47static const unsigned char seq_rgb_if[] = {
48 0xb3, 0x09,
49};
50
51static const unsigned char seq_display_inv[] = {
52 0xb4, 0x01, 0x08, 0x77, 0x0e, 0x06,
53};
54
55static const unsigned char seq_vcom[] = {
56 0xb6, 0x4c, 0x2e,
57};
58
59static const unsigned char seq_gate[] = {
60 0xd5, 0x00, 0x05, 0x03, 0x29, 0x01, 0x07, 0x17, 0x68, 0x13,
61 0x37, 0x20, 0x31, 0x8a, 0x46, 0x9b, 0x57, 0x13, 0x02, 0x75,
62 0xb9, 0x64, 0xa8, 0x07, 0x0f, 0x04, 0x07,
63};
64
65static const unsigned char seq_panel[] = {
66 0xcc, 0x02,
67};
68
69static const unsigned char seq_col_mod[] = {
70 0x3a, 0x77,
71};
72
73static const unsigned char seq_w_gamma[] = {
74 0xe0, 0x00, 0x04, 0x09, 0x0f, 0x1f, 0x3f, 0x1f, 0x2f, 0x0a,
75 0x0f, 0x10, 0x16, 0x18, 0x16, 0x17, 0x0d, 0x15, 0x00, 0x04,
76 0x09, 0x0f, 0x38, 0x3f, 0x20, 0x39, 0x0a, 0x0f, 0x10, 0x16,
77 0x18, 0x16, 0x17, 0x0d, 0x15,
78};
79
80static const unsigned char seq_rgb_gamma[] = {
81 0xc1, 0x01, 0x03, 0x07, 0x0f, 0x1a, 0x22, 0x2c, 0x33, 0x3c,
82 0x46, 0x4f, 0x58, 0x60, 0x69, 0x71, 0x79, 0x82, 0x89, 0x92,
83 0x9a, 0xa1, 0xa9, 0xb1, 0xb9, 0xc1, 0xc9, 0xcf, 0xd6, 0xde,
84 0xe5, 0xec, 0xf3, 0xf9, 0xff, 0xdd, 0x39, 0x07, 0x1c, 0xcb,
85 0xab, 0x5f, 0x49, 0x80, 0x03, 0x07, 0x0f, 0x19, 0x20, 0x2a,
86 0x31, 0x39, 0x42, 0x4b, 0x53, 0x5b, 0x63, 0x6b, 0x73, 0x7b,
87 0x83, 0x8a, 0x92, 0x9b, 0xa2, 0xaa, 0xb2, 0xba, 0xc2, 0xca,
88 0xd0, 0xd8, 0xe1, 0xe8, 0xf0, 0xf8, 0xff, 0xf7, 0xd8, 0xbe,
89 0xa7, 0x39, 0x40, 0x85, 0x8c, 0xc0, 0x04, 0x07, 0x0c, 0x17,
90 0x1c, 0x23, 0x2b, 0x34, 0x3b, 0x43, 0x4c, 0x54, 0x5b, 0x63,
91 0x6a, 0x73, 0x7a, 0x82, 0x8a, 0x91, 0x98, 0xa1, 0xa8, 0xb0,
92 0xb7, 0xc1, 0xc9, 0xcf, 0xd9, 0xe3, 0xea, 0xf4, 0xff, 0x00,
93 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
94};
95
96static const unsigned char seq_up_dn[] = {
97 0x36, 0x10,
98};
99
100static const unsigned char seq_sleep_in[] = {
101 0x10,
102};
103
104static const unsigned char seq_sleep_out[] = {
105 0x11,
106};
107
108static const unsigned char seq_display_on[] = {
109 0x29,
110};
111
112static const unsigned char seq_display_off[] = {
113 0x10,
114};
115
116static int lms501kf03_spi_write_byte(struct lms501kf03 *lcd, int addr, int data)
117{
118 u16 buf[1];
119 struct spi_message msg;
120
121 struct spi_transfer xfer = {
122 .len = 2,
123 .tx_buf = buf,
124 };
125
126 buf[0] = (addr << 8) | data;
127
128 spi_message_init(&msg);
129 spi_message_add_tail(&xfer, &msg);
130
131 return spi_sync(lcd->spi, &msg);
132}
133
134static int lms501kf03_spi_write(struct lms501kf03 *lcd, unsigned char address,
135 unsigned char command)
136{
137 return lms501kf03_spi_write_byte(lcd, address, command);
138}
139
140static int lms501kf03_panel_send_sequence(struct lms501kf03 *lcd,
141 const unsigned char *wbuf,
142 unsigned int len)
143{
144 int ret = 0, i = 0;
145
146 while (i < len) {
147 if (i == 0)
148 ret = lms501kf03_spi_write(lcd, COMMAND_ONLY, wbuf[i]);
149 else
150 ret = lms501kf03_spi_write(lcd, DATA_ONLY, wbuf[i]);
151 if (ret)
152 break;
153 i += 1;
154 }
155
156 return ret;
157}
158
159static int lms501kf03_ldi_init(struct lms501kf03 *lcd)
160{
161 int ret, i;
162 static const unsigned char *init_seq[] = {
163 seq_password,
164 seq_power,
165 seq_display,
166 seq_rgb_if,
167 seq_display_inv,
168 seq_vcom,
169 seq_gate,
170 seq_panel,
171 seq_col_mod,
172 seq_w_gamma,
173 seq_rgb_gamma,
174 seq_sleep_out,
175 };
176
177 static const unsigned int size_seq[] = {
178 ARRAY_SIZE(seq_password),
179 ARRAY_SIZE(seq_power),
180 ARRAY_SIZE(seq_display),
181 ARRAY_SIZE(seq_rgb_if),
182 ARRAY_SIZE(seq_display_inv),
183 ARRAY_SIZE(seq_vcom),
184 ARRAY_SIZE(seq_gate),
185 ARRAY_SIZE(seq_panel),
186 ARRAY_SIZE(seq_col_mod),
187 ARRAY_SIZE(seq_w_gamma),
188 ARRAY_SIZE(seq_rgb_gamma),
189 ARRAY_SIZE(seq_sleep_out),
190 };
191
192 for (i = 0; i < ARRAY_SIZE(init_seq); i++) {
193 ret = lms501kf03_panel_send_sequence(lcd, init_seq[i],
194 size_seq[i]);
195 if (ret)
196 break;
197 }
198
199
200
201
202
203 msleep(120);
204
205 return ret;
206}
207
208static int lms501kf03_ldi_enable(struct lms501kf03 *lcd)
209{
210 return lms501kf03_panel_send_sequence(lcd, seq_display_on,
211 ARRAY_SIZE(seq_display_on));
212}
213
214static int lms501kf03_ldi_disable(struct lms501kf03 *lcd)
215{
216 return lms501kf03_panel_send_sequence(lcd, seq_display_off,
217 ARRAY_SIZE(seq_display_off));
218}
219
220static int lms501kf03_power_is_on(int power)
221{
222 return (power) <= FB_BLANK_NORMAL;
223}
224
225static int lms501kf03_power_on(struct lms501kf03 *lcd)
226{
227 int ret = 0;
228 struct lcd_platform_data *pd;
229
230 pd = lcd->lcd_pd;
231
232 if (!pd->power_on) {
233 dev_err(lcd->dev, "power_on is NULL.\n");
234 return -EINVAL;
235 }
236
237 pd->power_on(lcd->ld, 1);
238 msleep(pd->power_on_delay);
239
240 if (!pd->reset) {
241 dev_err(lcd->dev, "reset is NULL.\n");
242 return -EINVAL;
243 }
244
245 pd->reset(lcd->ld);
246 msleep(pd->reset_delay);
247
248 ret = lms501kf03_ldi_init(lcd);
249 if (ret) {
250 dev_err(lcd->dev, "failed to initialize ldi.\n");
251 return ret;
252 }
253
254 ret = lms501kf03_ldi_enable(lcd);
255 if (ret) {
256 dev_err(lcd->dev, "failed to enable ldi.\n");
257 return ret;
258 }
259
260 return 0;
261}
262
263static int lms501kf03_power_off(struct lms501kf03 *lcd)
264{
265 int ret = 0;
266 struct lcd_platform_data *pd;
267
268 pd = lcd->lcd_pd;
269
270 ret = lms501kf03_ldi_disable(lcd);
271 if (ret) {
272 dev_err(lcd->dev, "lcd setting failed.\n");
273 return -EIO;
274 }
275
276 msleep(pd->power_off_delay);
277
278 pd->power_on(lcd->ld, 0);
279
280 return 0;
281}
282
283static int lms501kf03_power(struct lms501kf03 *lcd, int power)
284{
285 int ret = 0;
286
287 if (lms501kf03_power_is_on(power) &&
288 !lms501kf03_power_is_on(lcd->power))
289 ret = lms501kf03_power_on(lcd);
290 else if (!lms501kf03_power_is_on(power) &&
291 lms501kf03_power_is_on(lcd->power))
292 ret = lms501kf03_power_off(lcd);
293
294 if (!ret)
295 lcd->power = power;
296
297 return ret;
298}
299
300static int lms501kf03_get_power(struct lcd_device *ld)
301{
302 struct lms501kf03 *lcd = lcd_get_data(ld);
303
304 return lcd->power;
305}
306
307static int lms501kf03_set_power(struct lcd_device *ld, int power)
308{
309 struct lms501kf03 *lcd = lcd_get_data(ld);
310
311 if (power != FB_BLANK_UNBLANK && power != FB_BLANK_POWERDOWN &&
312 power != FB_BLANK_NORMAL) {
313 dev_err(lcd->dev, "power value should be 0, 1 or 4.\n");
314 return -EINVAL;
315 }
316
317 return lms501kf03_power(lcd, power);
318}
319
320static struct lcd_ops lms501kf03_lcd_ops = {
321 .get_power = lms501kf03_get_power,
322 .set_power = lms501kf03_set_power,
323};
324
325static int lms501kf03_probe(struct spi_device *spi)
326{
327 struct lms501kf03 *lcd = NULL;
328 struct lcd_device *ld = NULL;
329 int ret = 0;
330
331 lcd = devm_kzalloc(&spi->dev, sizeof(struct lms501kf03), GFP_KERNEL);
332 if (!lcd)
333 return -ENOMEM;
334
335
336 spi->bits_per_word = 9;
337
338 ret = spi_setup(spi);
339 if (ret < 0) {
340 dev_err(&spi->dev, "spi setup failed.\n");
341 return ret;
342 }
343
344 lcd->spi = spi;
345 lcd->dev = &spi->dev;
346
347 lcd->lcd_pd = dev_get_platdata(&spi->dev);
348 if (!lcd->lcd_pd) {
349 dev_err(&spi->dev, "platform data is NULL\n");
350 return -EINVAL;
351 }
352
353 ld = devm_lcd_device_register(&spi->dev, "lms501kf03", &spi->dev, lcd,
354 &lms501kf03_lcd_ops);
355 if (IS_ERR(ld))
356 return PTR_ERR(ld);
357
358 lcd->ld = ld;
359
360 if (!lcd->lcd_pd->lcd_enabled) {
361
362
363
364
365
366 lcd->power = FB_BLANK_POWERDOWN;
367
368 lms501kf03_power(lcd, FB_BLANK_UNBLANK);
369 } else {
370 lcd->power = FB_BLANK_UNBLANK;
371 }
372
373 spi_set_drvdata(spi, lcd);
374
375 dev_info(&spi->dev, "lms501kf03 panel driver has been probed.\n");
376
377 return 0;
378}
379
380static int lms501kf03_remove(struct spi_device *spi)
381{
382 struct lms501kf03 *lcd = spi_get_drvdata(spi);
383
384 lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
385 return 0;
386}
387
388#ifdef CONFIG_PM_SLEEP
389static int lms501kf03_suspend(struct device *dev)
390{
391 struct lms501kf03 *lcd = dev_get_drvdata(dev);
392
393 dev_dbg(dev, "lcd->power = %d\n", lcd->power);
394
395
396
397
398
399 return lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
400}
401
402static int lms501kf03_resume(struct device *dev)
403{
404 struct lms501kf03 *lcd = dev_get_drvdata(dev);
405
406 lcd->power = FB_BLANK_POWERDOWN;
407
408 return lms501kf03_power(lcd, FB_BLANK_UNBLANK);
409}
410#endif
411
412static SIMPLE_DEV_PM_OPS(lms501kf03_pm_ops, lms501kf03_suspend,
413 lms501kf03_resume);
414
415static void lms501kf03_shutdown(struct spi_device *spi)
416{
417 struct lms501kf03 *lcd = spi_get_drvdata(spi);
418
419 lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
420}
421
422static struct spi_driver lms501kf03_driver = {
423 .driver = {
424 .name = "lms501kf03",
425 .pm = &lms501kf03_pm_ops,
426 },
427 .probe = lms501kf03_probe,
428 .remove = lms501kf03_remove,
429 .shutdown = lms501kf03_shutdown,
430};
431
432module_spi_driver(lms501kf03_driver);
433
434MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
435MODULE_DESCRIPTION("lms501kf03 LCD Driver");
436MODULE_LICENSE("GPL");
437
