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1be9ca25 JH |
1 | /* |
2 | * lms501kf03 TFT LCD panel driver. | |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * Author: Jingoo Han <jg1.han@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | */ | |
12 | ||
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 | ||
25 | struct 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 | ||
33 | static const unsigned char seq_password[] = { | |
34 | 0xb9, 0xff, 0x83, 0x69, | |
35 | }; | |
36 | ||
37 | static 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 | ||
42 | static 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 | ||
47 | static const unsigned char seq_rgb_if[] = { | |
48 | 0xb3, 0x09, | |
49 | }; | |
50 | ||
51 | static const unsigned char seq_display_inv[] = { | |
52 | 0xb4, 0x01, 0x08, 0x77, 0x0e, 0x06, | |
53 | }; | |
54 | ||
55 | static const unsigned char seq_vcom[] = { | |
56 | 0xb6, 0x4c, 0x2e, | |
57 | }; | |
58 | ||
59 | static 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 | ||
65 | static const unsigned char seq_panel[] = { | |
66 | 0xcc, 0x02, | |
67 | }; | |
68 | ||
69 | static const unsigned char seq_col_mod[] = { | |
70 | 0x3a, 0x77, | |
71 | }; | |
72 | ||
73 | static 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 | ||
80 | static 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 | ||
96 | static const unsigned char seq_up_dn[] = { | |
97 | 0x36, 0x10, | |
98 | }; | |
99 | ||
100 | static const unsigned char seq_sleep_in[] = { | |
101 | 0x10, | |
102 | }; | |
103 | ||
104 | static const unsigned char seq_sleep_out[] = { | |
105 | 0x11, | |
106 | }; | |
107 | ||
108 | static const unsigned char seq_display_on[] = { | |
109 | 0x29, | |
110 | }; | |
111 | ||
112 | static const unsigned char seq_display_off[] = { | |
113 | 0x10, | |
114 | }; | |
115 | ||
116 | static 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 | ||
134 | static 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 | ||
140 | static 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 | ||
159 | static 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 | * According to the datasheet, 120ms delay time is required. | |
200 | * After sleep out sequence, command is blocked for 120ms. | |
201 | * Thus, LDI should wait for 120ms. | |
202 | */ | |
203 | msleep(120); | |
204 | ||
205 | return ret; | |
206 | } | |
207 | ||
208 | static 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 | ||
214 | static 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 | ||
220 | static int lms501kf03_power_is_on(int power) | |
221 | { | |
222 | return (power) <= FB_BLANK_NORMAL; | |
223 | } | |
224 | ||
225 | static 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; | |
1be9ca25 JH |
235 | } |
236 | ||
b50ffb8a JH |
237 | pd->power_on(lcd->ld, 1); |
238 | msleep(pd->power_on_delay); | |
239 | ||
1be9ca25 JH |
240 | if (!pd->reset) { |
241 | dev_err(lcd->dev, "reset is NULL.\n"); | |
242 | return -EINVAL; | |
1be9ca25 JH |
243 | } |
244 | ||
b50ffb8a JH |
245 | pd->reset(lcd->ld); |
246 | msleep(pd->reset_delay); | |
247 | ||
1be9ca25 JH |
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 | ||
263 | static 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 | ||
283 | static 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 | ||
300 | static int lms501kf03_get_power(struct lcd_device *ld) | |
301 | { | |
302 | struct lms501kf03 *lcd = lcd_get_data(ld); | |
303 | ||
304 | return lcd->power; | |
305 | } | |
306 | ||
307 | static 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 | ||
320 | static struct lcd_ops lms501kf03_lcd_ops = { | |
321 | .get_power = lms501kf03_get_power, | |
322 | .set_power = lms501kf03_set_power, | |
323 | }; | |
324 | ||
325 | static 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 | /* lms501kf03 lcd panel uses 3-wire 9-bit SPI Mode. */ | |
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 | ||
c512794c | 347 | lcd->lcd_pd = dev_get_platdata(&spi->dev); |
1be9ca25 JH |
348 | if (!lcd->lcd_pd) { |
349 | dev_err(&spi->dev, "platform data is NULL\n"); | |
350 | return -EINVAL; | |
351 | } | |
352 | ||
8358741a JH |
353 | ld = devm_lcd_device_register(&spi->dev, "lms501kf03", &spi->dev, lcd, |
354 | &lms501kf03_lcd_ops); | |
1be9ca25 JH |
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 | * if lcd panel was off from bootloader then | |
363 | * current lcd status is powerdown and then | |
364 | * it enables lcd panel. | |
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 | ||
281ea16a | 373 | spi_set_drvdata(spi, lcd); |
1be9ca25 JH |
374 | |
375 | dev_info(&spi->dev, "lms501kf03 panel driver has been probed.\n"); | |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
380 | static int lms501kf03_remove(struct spi_device *spi) | |
381 | { | |
281ea16a | 382 | struct lms501kf03 *lcd = spi_get_drvdata(spi); |
1be9ca25 JH |
383 | |
384 | lms501kf03_power(lcd, FB_BLANK_POWERDOWN); | |
1be9ca25 JH |
385 | return 0; |
386 | } | |
387 | ||
26cd2a44 JH |
388 | #ifdef CONFIG_PM_SLEEP |
389 | static int lms501kf03_suspend(struct device *dev) | |
1be9ca25 | 390 | { |
26cd2a44 | 391 | struct lms501kf03 *lcd = dev_get_drvdata(dev); |
1be9ca25 | 392 | |
26cd2a44 | 393 | dev_dbg(dev, "lcd->power = %d\n", lcd->power); |
1be9ca25 JH |
394 | |
395 | /* | |
396 | * when lcd panel is suspend, lcd panel becomes off | |
397 | * regardless of status. | |
398 | */ | |
399 | return lms501kf03_power(lcd, FB_BLANK_POWERDOWN); | |
400 | } | |
401 | ||
26cd2a44 | 402 | static int lms501kf03_resume(struct device *dev) |
1be9ca25 | 403 | { |
26cd2a44 | 404 | struct lms501kf03 *lcd = dev_get_drvdata(dev); |
1be9ca25 JH |
405 | |
406 | lcd->power = FB_BLANK_POWERDOWN; | |
407 | ||
408 | return lms501kf03_power(lcd, FB_BLANK_UNBLANK); | |
409 | } | |
1be9ca25 JH |
410 | #endif |
411 | ||
26cd2a44 JH |
412 | static SIMPLE_DEV_PM_OPS(lms501kf03_pm_ops, lms501kf03_suspend, |
413 | lms501kf03_resume); | |
414 | ||
1be9ca25 JH |
415 | static void lms501kf03_shutdown(struct spi_device *spi) |
416 | { | |
281ea16a | 417 | struct lms501kf03 *lcd = spi_get_drvdata(spi); |
1be9ca25 JH |
418 | |
419 | lms501kf03_power(lcd, FB_BLANK_POWERDOWN); | |
420 | } | |
421 | ||
422 | static struct spi_driver lms501kf03_driver = { | |
423 | .driver = { | |
424 | .name = "lms501kf03", | |
26cd2a44 | 425 | .pm = &lms501kf03_pm_ops, |
1be9ca25 JH |
426 | }, |
427 | .probe = lms501kf03_probe, | |
428 | .remove = lms501kf03_remove, | |
429 | .shutdown = lms501kf03_shutdown, | |
1be9ca25 JH |
430 | }; |
431 | ||
432 | module_spi_driver(lms501kf03_driver); | |
433 | ||
434 | MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>"); | |
435 | MODULE_DESCRIPTION("lms501kf03 LCD Driver"); | |
436 | MODULE_LICENSE("GPL"); |