Commit | Line | Data |
---|---|---|
a2ed00da | 1 | /* |
a895d57d | 2 | * Driver for the Solomon SSD1307 OLED controller |
a2ed00da MR |
3 | * |
4 | * Copyright 2012 Free Electrons | |
5 | * | |
6 | * Licensed under the GPLv2 or later. | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
6ed5e2db | 10 | #include <linux/backlight.h> |
a2ed00da MR |
11 | #include <linux/kernel.h> |
12 | #include <linux/i2c.h> | |
13 | #include <linux/fb.h> | |
14 | #include <linux/uaccess.h> | |
15 | #include <linux/of_device.h> | |
16 | #include <linux/of_gpio.h> | |
17 | #include <linux/pwm.h> | |
18 | #include <linux/delay.h> | |
19 | ||
a2ed00da MR |
20 | #define SSD1307FB_DATA 0x40 |
21 | #define SSD1307FB_COMMAND 0x80 | |
22 | ||
301bc067 MR |
23 | #define SSD1307FB_SET_ADDRESS_MODE 0x20 |
24 | #define SSD1307FB_SET_ADDRESS_MODE_HORIZONTAL (0x00) | |
25 | #define SSD1307FB_SET_ADDRESS_MODE_VERTICAL (0x01) | |
26 | #define SSD1307FB_SET_ADDRESS_MODE_PAGE (0x02) | |
27 | #define SSD1307FB_SET_COL_RANGE 0x21 | |
28 | #define SSD1307FB_SET_PAGE_RANGE 0x22 | |
a2ed00da | 29 | #define SSD1307FB_CONTRAST 0x81 |
bbc79089 | 30 | #define SSD1307FB_CHARGE_PUMP 0x8d |
a2ed00da MR |
31 | #define SSD1307FB_SEG_REMAP_ON 0xa1 |
32 | #define SSD1307FB_DISPLAY_OFF 0xae | |
bbc79089 | 33 | #define SSD1307FB_SET_MULTIPLEX_RATIO 0xa8 |
a2ed00da MR |
34 | #define SSD1307FB_DISPLAY_ON 0xaf |
35 | #define SSD1307FB_START_PAGE_ADDRESS 0xb0 | |
bbc79089 MR |
36 | #define SSD1307FB_SET_DISPLAY_OFFSET 0xd3 |
37 | #define SSD1307FB_SET_CLOCK_FREQ 0xd5 | |
38 | #define SSD1307FB_SET_PRECHARGE_PERIOD 0xd9 | |
39 | #define SSD1307FB_SET_COM_PINS_CONFIG 0xda | |
40 | #define SSD1307FB_SET_VCOMH 0xdb | |
41 | ||
6ed5e2db TN |
42 | #define MAX_CONTRAST 255 |
43 | ||
3277e0bb TN |
44 | #define REFRESHRATE 1 |
45 | ||
46 | static u_int refreshrate = REFRESHRATE; | |
47 | module_param(refreshrate, uint, 0); | |
48 | ||
bbc79089 MR |
49 | struct ssd1307fb_par; |
50 | ||
c89eacfc TN |
51 | struct ssd1307fb_deviceinfo { |
52 | u32 default_vcomh; | |
53 | u32 default_dclk_div; | |
54 | u32 default_dclk_frq; | |
55 | int need_pwm; | |
56 | int need_chargepump; | |
bbc79089 | 57 | }; |
a2ed00da MR |
58 | |
59 | struct ssd1307fb_par { | |
c89eacfc TN |
60 | u32 com_invdir; |
61 | u32 com_lrremap; | |
62 | u32 com_offset; | |
63 | u32 com_seq; | |
64 | u32 contrast; | |
65 | u32 dclk_div; | |
66 | u32 dclk_frq; | |
67 | struct ssd1307fb_deviceinfo *device_info; | |
a2ed00da | 68 | struct i2c_client *client; |
bbc79089 | 69 | u32 height; |
a2ed00da | 70 | struct fb_info *info; |
bbc79089 | 71 | u32 page_offset; |
c89eacfc TN |
72 | u32 prechargep1; |
73 | u32 prechargep2; | |
a2ed00da MR |
74 | struct pwm_device *pwm; |
75 | u32 pwm_period; | |
76 | int reset; | |
c89eacfc TN |
77 | u32 seg_remap; |
78 | u32 vcomh; | |
bbc79089 | 79 | u32 width; |
a2ed00da MR |
80 | }; |
81 | ||
9f7714d4 MR |
82 | struct ssd1307fb_array { |
83 | u8 type; | |
84 | u8 data[0]; | |
85 | }; | |
86 | ||
48c68c4f | 87 | static struct fb_fix_screeninfo ssd1307fb_fix = { |
a2ed00da MR |
88 | .id = "Solomon SSD1307", |
89 | .type = FB_TYPE_PACKED_PIXELS, | |
90 | .visual = FB_VISUAL_MONO10, | |
91 | .xpanstep = 0, | |
92 | .ypanstep = 0, | |
93 | .ywrapstep = 0, | |
a2ed00da MR |
94 | .accel = FB_ACCEL_NONE, |
95 | }; | |
96 | ||
48c68c4f | 97 | static struct fb_var_screeninfo ssd1307fb_var = { |
a2ed00da MR |
98 | .bits_per_pixel = 1, |
99 | }; | |
100 | ||
9f7714d4 | 101 | static struct ssd1307fb_array *ssd1307fb_alloc_array(u32 len, u8 type) |
a2ed00da | 102 | { |
9f7714d4 | 103 | struct ssd1307fb_array *array; |
a2ed00da | 104 | |
9f7714d4 MR |
105 | array = kzalloc(sizeof(struct ssd1307fb_array) + len, GFP_KERNEL); |
106 | if (!array) | |
107 | return NULL; | |
a2ed00da | 108 | |
9f7714d4 | 109 | array->type = type; |
a2ed00da | 110 | |
9f7714d4 | 111 | return array; |
a2ed00da MR |
112 | } |
113 | ||
9f7714d4 MR |
114 | static int ssd1307fb_write_array(struct i2c_client *client, |
115 | struct ssd1307fb_array *array, u32 len) | |
a2ed00da | 116 | { |
9f7714d4 MR |
117 | int ret; |
118 | ||
119 | len += sizeof(struct ssd1307fb_array); | |
120 | ||
121 | ret = i2c_master_send(client, (u8 *)array, len); | |
122 | if (ret != len) { | |
123 | dev_err(&client->dev, "Couldn't send I2C command.\n"); | |
124 | return ret; | |
125 | } | |
126 | ||
127 | return 0; | |
a2ed00da MR |
128 | } |
129 | ||
130 | static inline int ssd1307fb_write_cmd(struct i2c_client *client, u8 cmd) | |
131 | { | |
9f7714d4 MR |
132 | struct ssd1307fb_array *array; |
133 | int ret; | |
a2ed00da | 134 | |
9f7714d4 MR |
135 | array = ssd1307fb_alloc_array(1, SSD1307FB_COMMAND); |
136 | if (!array) | |
137 | return -ENOMEM; | |
138 | ||
139 | array->data[0] = cmd; | |
140 | ||
141 | ret = ssd1307fb_write_array(client, array, 1); | |
142 | kfree(array); | |
143 | ||
144 | return ret; | |
a2ed00da MR |
145 | } |
146 | ||
a2ed00da MR |
147 | static void ssd1307fb_update_display(struct ssd1307fb_par *par) |
148 | { | |
301bc067 | 149 | struct ssd1307fb_array *array; |
a2ed00da MR |
150 | u8 *vmem = par->info->screen_base; |
151 | int i, j, k; | |
152 | ||
301bc067 MR |
153 | array = ssd1307fb_alloc_array(par->width * par->height / 8, |
154 | SSD1307FB_DATA); | |
155 | if (!array) | |
156 | return; | |
157 | ||
a2ed00da MR |
158 | /* |
159 | * The screen is divided in pages, each having a height of 8 | |
160 | * pixels, and the width of the screen. When sending a byte of | |
161 | * data to the controller, it gives the 8 bits for the current | |
162 | * column. I.e, the first byte are the 8 bits of the first | |
163 | * column, then the 8 bits for the second column, etc. | |
164 | * | |
165 | * | |
166 | * Representation of the screen, assuming it is 5 bits | |
167 | * wide. Each letter-number combination is a bit that controls | |
168 | * one pixel. | |
169 | * | |
170 | * A0 A1 A2 A3 A4 | |
171 | * B0 B1 B2 B3 B4 | |
172 | * C0 C1 C2 C3 C4 | |
173 | * D0 D1 D2 D3 D4 | |
174 | * E0 E1 E2 E3 E4 | |
175 | * F0 F1 F2 F3 F4 | |
176 | * G0 G1 G2 G3 G4 | |
177 | * H0 H1 H2 H3 H4 | |
178 | * | |
179 | * If you want to update this screen, you need to send 5 bytes: | |
180 | * (1) A0 B0 C0 D0 E0 F0 G0 H0 | |
181 | * (2) A1 B1 C1 D1 E1 F1 G1 H1 | |
182 | * (3) A2 B2 C2 D2 E2 F2 G2 H2 | |
183 | * (4) A3 B3 C3 D3 E3 F3 G3 H3 | |
184 | * (5) A4 B4 C4 D4 E4 F4 G4 H4 | |
185 | */ | |
186 | ||
bbc79089 | 187 | for (i = 0; i < (par->height / 8); i++) { |
bbc79089 | 188 | for (j = 0; j < par->width; j++) { |
301bc067 MR |
189 | u32 array_idx = i * par->width + j; |
190 | array->data[array_idx] = 0; | |
a2ed00da | 191 | for (k = 0; k < 8; k++) { |
bbc79089 MR |
192 | u32 page_length = par->width * i; |
193 | u32 index = page_length + (par->width * k + j) / 8; | |
a2ed00da | 194 | u8 byte = *(vmem + index); |
552f0cc7 MR |
195 | u8 bit = byte & (1 << (j % 8)); |
196 | bit = bit >> (j % 8); | |
301bc067 | 197 | array->data[array_idx] |= bit << k; |
a2ed00da | 198 | } |
a2ed00da MR |
199 | } |
200 | } | |
301bc067 MR |
201 | |
202 | ssd1307fb_write_array(par->client, array, par->width * par->height / 8); | |
203 | kfree(array); | |
a2ed00da MR |
204 | } |
205 | ||
206 | ||
207 | static ssize_t ssd1307fb_write(struct fb_info *info, const char __user *buf, | |
208 | size_t count, loff_t *ppos) | |
209 | { | |
210 | struct ssd1307fb_par *par = info->par; | |
211 | unsigned long total_size; | |
212 | unsigned long p = *ppos; | |
213 | u8 __iomem *dst; | |
214 | ||
215 | total_size = info->fix.smem_len; | |
216 | ||
217 | if (p > total_size) | |
218 | return -EINVAL; | |
219 | ||
220 | if (count + p > total_size) | |
221 | count = total_size - p; | |
222 | ||
223 | if (!count) | |
224 | return -EINVAL; | |
225 | ||
226 | dst = (void __force *) (info->screen_base + p); | |
227 | ||
228 | if (copy_from_user(dst, buf, count)) | |
229 | return -EFAULT; | |
230 | ||
231 | ssd1307fb_update_display(par); | |
232 | ||
233 | *ppos += count; | |
234 | ||
235 | return count; | |
236 | } | |
237 | ||
550e768c TN |
238 | static int ssd1307fb_blank(int blank_mode, struct fb_info *info) |
239 | { | |
240 | struct ssd1307fb_par *par = info->par; | |
241 | ||
242 | if (blank_mode != FB_BLANK_UNBLANK) | |
243 | return ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_OFF); | |
244 | else | |
245 | return ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON); | |
246 | } | |
247 | ||
a2ed00da MR |
248 | static void ssd1307fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) |
249 | { | |
250 | struct ssd1307fb_par *par = info->par; | |
251 | sys_fillrect(info, rect); | |
252 | ssd1307fb_update_display(par); | |
253 | } | |
254 | ||
255 | static void ssd1307fb_copyarea(struct fb_info *info, const struct fb_copyarea *area) | |
256 | { | |
257 | struct ssd1307fb_par *par = info->par; | |
258 | sys_copyarea(info, area); | |
259 | ssd1307fb_update_display(par); | |
260 | } | |
261 | ||
262 | static void ssd1307fb_imageblit(struct fb_info *info, const struct fb_image *image) | |
263 | { | |
264 | struct ssd1307fb_par *par = info->par; | |
265 | sys_imageblit(info, image); | |
266 | ssd1307fb_update_display(par); | |
267 | } | |
268 | ||
269 | static struct fb_ops ssd1307fb_ops = { | |
270 | .owner = THIS_MODULE, | |
271 | .fb_read = fb_sys_read, | |
272 | .fb_write = ssd1307fb_write, | |
550e768c | 273 | .fb_blank = ssd1307fb_blank, |
a2ed00da MR |
274 | .fb_fillrect = ssd1307fb_fillrect, |
275 | .fb_copyarea = ssd1307fb_copyarea, | |
276 | .fb_imageblit = ssd1307fb_imageblit, | |
277 | }; | |
278 | ||
279 | static void ssd1307fb_deferred_io(struct fb_info *info, | |
280 | struct list_head *pagelist) | |
281 | { | |
282 | ssd1307fb_update_display(info->par); | |
283 | } | |
284 | ||
c89eacfc | 285 | static int ssd1307fb_init(struct ssd1307fb_par *par) |
bbc79089 MR |
286 | { |
287 | int ret; | |
c89eacfc | 288 | u32 precharge, dclk, com_invdir, compins; |
bbc79089 | 289 | |
c89eacfc TN |
290 | if (par->device_info->need_pwm) { |
291 | par->pwm = pwm_get(&par->client->dev, NULL); | |
292 | if (IS_ERR(par->pwm)) { | |
293 | dev_err(&par->client->dev, "Could not get PWM from device tree!\n"); | |
294 | return PTR_ERR(par->pwm); | |
295 | } | |
bbc79089 | 296 | |
c89eacfc TN |
297 | par->pwm_period = pwm_get_period(par->pwm); |
298 | /* Enable the PWM */ | |
299 | pwm_config(par->pwm, par->pwm_period / 2, par->pwm_period); | |
300 | pwm_enable(par->pwm); | |
bbc79089 | 301 | |
c89eacfc TN |
302 | dev_dbg(&par->client->dev, "Using PWM%d with a %dns period.\n", |
303 | par->pwm->pwm, par->pwm_period); | |
304 | }; | |
bbc79089 MR |
305 | |
306 | /* Set initial contrast */ | |
307 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CONTRAST); | |
5b72ae9a PL |
308 | if (ret < 0) |
309 | return ret; | |
310 | ||
c89eacfc | 311 | ret = ssd1307fb_write_cmd(par->client, par->contrast); |
bbc79089 MR |
312 | if (ret < 0) |
313 | return ret; | |
314 | ||
315 | /* Set segment re-map */ | |
c89eacfc TN |
316 | if (par->seg_remap) { |
317 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SEG_REMAP_ON); | |
318 | if (ret < 0) | |
319 | return ret; | |
320 | }; | |
321 | ||
322 | /* Set COM direction */ | |
323 | com_invdir = 0xc0 | (par->com_invdir & 0x1) << 3; | |
324 | ret = ssd1307fb_write_cmd(par->client, com_invdir); | |
bbc79089 MR |
325 | if (ret < 0) |
326 | return ret; | |
327 | ||
328 | /* Set multiplex ratio value */ | |
329 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_MULTIPLEX_RATIO); | |
5b72ae9a PL |
330 | if (ret < 0) |
331 | return ret; | |
332 | ||
333 | ret = ssd1307fb_write_cmd(par->client, par->height - 1); | |
bbc79089 MR |
334 | if (ret < 0) |
335 | return ret; | |
336 | ||
337 | /* set display offset value */ | |
338 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_DISPLAY_OFFSET); | |
5b72ae9a PL |
339 | if (ret < 0) |
340 | return ret; | |
341 | ||
c89eacfc | 342 | ret = ssd1307fb_write_cmd(par->client, par->com_offset); |
bbc79089 MR |
343 | if (ret < 0) |
344 | return ret; | |
345 | ||
346 | /* Set clock frequency */ | |
347 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_CLOCK_FREQ); | |
5b72ae9a PL |
348 | if (ret < 0) |
349 | return ret; | |
350 | ||
c89eacfc TN |
351 | dclk = ((par->dclk_div - 1) & 0xf) | (par->dclk_frq & 0xf) << 4; |
352 | ret = ssd1307fb_write_cmd(par->client, dclk); | |
bbc79089 MR |
353 | if (ret < 0) |
354 | return ret; | |
355 | ||
356 | /* Set precharge period in number of ticks from the internal clock */ | |
357 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PRECHARGE_PERIOD); | |
5b72ae9a PL |
358 | if (ret < 0) |
359 | return ret; | |
360 | ||
c89eacfc TN |
361 | precharge = (par->prechargep1 & 0xf) | (par->prechargep2 & 0xf) << 4; |
362 | ret = ssd1307fb_write_cmd(par->client, precharge); | |
bbc79089 MR |
363 | if (ret < 0) |
364 | return ret; | |
365 | ||
366 | /* Set COM pins configuration */ | |
367 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COM_PINS_CONFIG); | |
5b72ae9a PL |
368 | if (ret < 0) |
369 | return ret; | |
370 | ||
5e47932b | 371 | compins = 0x02 | !(par->com_seq & 0x1) << 4 |
c89eacfc TN |
372 | | (par->com_lrremap & 0x1) << 5; |
373 | ret = ssd1307fb_write_cmd(par->client, compins); | |
bbc79089 MR |
374 | if (ret < 0) |
375 | return ret; | |
376 | ||
377 | /* Set VCOMH */ | |
378 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_VCOMH); | |
5b72ae9a PL |
379 | if (ret < 0) |
380 | return ret; | |
381 | ||
c89eacfc | 382 | ret = ssd1307fb_write_cmd(par->client, par->vcomh); |
bbc79089 MR |
383 | if (ret < 0) |
384 | return ret; | |
385 | ||
386 | /* Turn on the DC-DC Charge Pump */ | |
387 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CHARGE_PUMP); | |
5b72ae9a PL |
388 | if (ret < 0) |
389 | return ret; | |
390 | ||
c89eacfc TN |
391 | ret = ssd1307fb_write_cmd(par->client, |
392 | (par->device_info->need_chargepump & 0x1 << 2) & 0x14); | |
bbc79089 MR |
393 | if (ret < 0) |
394 | return ret; | |
395 | ||
301bc067 MR |
396 | /* Switch to horizontal addressing mode */ |
397 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_ADDRESS_MODE); | |
5b72ae9a PL |
398 | if (ret < 0) |
399 | return ret; | |
400 | ||
401 | ret = ssd1307fb_write_cmd(par->client, | |
402 | SSD1307FB_SET_ADDRESS_MODE_HORIZONTAL); | |
301bc067 MR |
403 | if (ret < 0) |
404 | return ret; | |
405 | ||
c89eacfc | 406 | /* Set column range */ |
301bc067 | 407 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COL_RANGE); |
5b72ae9a PL |
408 | if (ret < 0) |
409 | return ret; | |
410 | ||
411 | ret = ssd1307fb_write_cmd(par->client, 0x0); | |
412 | if (ret < 0) | |
413 | return ret; | |
414 | ||
415 | ret = ssd1307fb_write_cmd(par->client, par->width - 1); | |
301bc067 MR |
416 | if (ret < 0) |
417 | return ret; | |
418 | ||
c89eacfc | 419 | /* Set page range */ |
301bc067 | 420 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PAGE_RANGE); |
5b72ae9a PL |
421 | if (ret < 0) |
422 | return ret; | |
423 | ||
424 | ret = ssd1307fb_write_cmd(par->client, 0x0); | |
425 | if (ret < 0) | |
426 | return ret; | |
427 | ||
428 | ret = ssd1307fb_write_cmd(par->client, | |
429 | par->page_offset + (par->height / 8) - 1); | |
301bc067 MR |
430 | if (ret < 0) |
431 | return ret; | |
432 | ||
bbc79089 MR |
433 | /* Turn on the display */ |
434 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON); | |
435 | if (ret < 0) | |
436 | return ret; | |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
6ed5e2db TN |
441 | static int ssd1307fb_update_bl(struct backlight_device *bdev) |
442 | { | |
443 | struct ssd1307fb_par *par = bl_get_data(bdev); | |
444 | int ret; | |
445 | int brightness = bdev->props.brightness; | |
446 | ||
447 | par->contrast = brightness; | |
448 | ||
449 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CONTRAST); | |
450 | if (ret < 0) | |
451 | return ret; | |
452 | ret = ssd1307fb_write_cmd(par->client, par->contrast); | |
453 | if (ret < 0) | |
454 | return ret; | |
455 | return 0; | |
456 | } | |
457 | ||
458 | static int ssd1307fb_get_brightness(struct backlight_device *bdev) | |
459 | { | |
460 | struct ssd1307fb_par *par = bl_get_data(bdev); | |
461 | ||
462 | return par->contrast; | |
463 | } | |
464 | ||
465 | static int ssd1307fb_check_fb(struct backlight_device *bdev, | |
466 | struct fb_info *info) | |
467 | { | |
468 | return (info->bl_dev == bdev); | |
469 | } | |
470 | ||
471 | static const struct backlight_ops ssd1307fb_bl_ops = { | |
472 | .options = BL_CORE_SUSPENDRESUME, | |
473 | .update_status = ssd1307fb_update_bl, | |
474 | .get_brightness = ssd1307fb_get_brightness, | |
475 | .check_fb = ssd1307fb_check_fb, | |
476 | }; | |
477 | ||
5f2d36b3 TN |
478 | static struct ssd1307fb_deviceinfo ssd1307fb_ssd1305_deviceinfo = { |
479 | .default_vcomh = 0x34, | |
480 | .default_dclk_div = 1, | |
481 | .default_dclk_frq = 7, | |
482 | }; | |
483 | ||
c89eacfc TN |
484 | static struct ssd1307fb_deviceinfo ssd1307fb_ssd1306_deviceinfo = { |
485 | .default_vcomh = 0x20, | |
486 | .default_dclk_div = 1, | |
487 | .default_dclk_frq = 8, | |
488 | .need_chargepump = 1, | |
489 | }; | |
490 | ||
491 | static struct ssd1307fb_deviceinfo ssd1307fb_ssd1307_deviceinfo = { | |
492 | .default_vcomh = 0x20, | |
493 | .default_dclk_div = 2, | |
494 | .default_dclk_frq = 12, | |
495 | .need_pwm = 1, | |
bbc79089 MR |
496 | }; |
497 | ||
498 | static const struct of_device_id ssd1307fb_of_match[] = { | |
5f2d36b3 TN |
499 | { |
500 | .compatible = "solomon,ssd1305fb-i2c", | |
501 | .data = (void *)&ssd1307fb_ssd1305_deviceinfo, | |
502 | }, | |
bbc79089 MR |
503 | { |
504 | .compatible = "solomon,ssd1306fb-i2c", | |
c89eacfc | 505 | .data = (void *)&ssd1307fb_ssd1306_deviceinfo, |
bbc79089 MR |
506 | }, |
507 | { | |
508 | .compatible = "solomon,ssd1307fb-i2c", | |
c89eacfc | 509 | .data = (void *)&ssd1307fb_ssd1307_deviceinfo, |
bbc79089 MR |
510 | }, |
511 | {}, | |
512 | }; | |
513 | MODULE_DEVICE_TABLE(of, ssd1307fb_of_match); | |
514 | ||
48c68c4f GKH |
515 | static int ssd1307fb_probe(struct i2c_client *client, |
516 | const struct i2c_device_id *id) | |
a2ed00da | 517 | { |
6ed5e2db TN |
518 | struct backlight_device *bl; |
519 | char bl_name[12]; | |
a2ed00da | 520 | struct fb_info *info; |
bbc79089 | 521 | struct device_node *node = client->dev.of_node; |
3277e0bb | 522 | struct fb_deferred_io *ssd1307fb_defio; |
bbc79089 | 523 | u32 vmem_size; |
a2ed00da MR |
524 | struct ssd1307fb_par *par; |
525 | u8 *vmem; | |
526 | int ret; | |
527 | ||
bbc79089 | 528 | if (!node) { |
a2ed00da MR |
529 | dev_err(&client->dev, "No device tree data found!\n"); |
530 | return -EINVAL; | |
531 | } | |
532 | ||
533 | info = framebuffer_alloc(sizeof(struct ssd1307fb_par), &client->dev); | |
534 | if (!info) { | |
535 | dev_err(&client->dev, "Couldn't allocate framebuffer.\n"); | |
536 | return -ENOMEM; | |
537 | } | |
538 | ||
bbc79089 MR |
539 | par = info->par; |
540 | par->info = info; | |
541 | par->client = client; | |
542 | ||
c89eacfc TN |
543 | par->device_info = (struct ssd1307fb_deviceinfo *)of_match_device( |
544 | ssd1307fb_of_match, &client->dev)->data; | |
bbc79089 MR |
545 | |
546 | par->reset = of_get_named_gpio(client->dev.of_node, | |
547 | "reset-gpios", 0); | |
548 | if (!gpio_is_valid(par->reset)) { | |
549 | ret = -EINVAL; | |
550 | goto fb_alloc_error; | |
551 | } | |
552 | ||
553 | if (of_property_read_u32(node, "solomon,width", &par->width)) | |
554 | par->width = 96; | |
555 | ||
556 | if (of_property_read_u32(node, "solomon,height", &par->height)) | |
9561def0 | 557 | par->height = 16; |
bbc79089 MR |
558 | |
559 | if (of_property_read_u32(node, "solomon,page-offset", &par->page_offset)) | |
560 | par->page_offset = 1; | |
561 | ||
c89eacfc TN |
562 | if (of_property_read_u32(node, "solomon,com-offset", &par->com_offset)) |
563 | par->com_offset = 0; | |
564 | ||
565 | if (of_property_read_u32(node, "solomon,prechargep1", &par->prechargep1)) | |
566 | par->prechargep1 = 2; | |
567 | ||
568 | if (of_property_read_u32(node, "solomon,prechargep2", &par->prechargep2)) | |
569 | par->prechargep2 = 2; | |
570 | ||
571 | par->seg_remap = !of_property_read_bool(node, "solomon,segment-no-remap"); | |
572 | par->com_seq = of_property_read_bool(node, "solomon,com-seq"); | |
573 | par->com_lrremap = of_property_read_bool(node, "solomon,com-lrremap"); | |
574 | par->com_invdir = of_property_read_bool(node, "solomon,com-invdir"); | |
575 | ||
576 | par->contrast = 127; | |
577 | par->vcomh = par->device_info->default_vcomh; | |
578 | ||
579 | /* Setup display timing */ | |
580 | par->dclk_div = par->device_info->default_dclk_div; | |
581 | par->dclk_frq = par->device_info->default_dclk_frq; | |
582 | ||
bbc79089 MR |
583 | vmem_size = par->width * par->height / 8; |
584 | ||
facd94bc TN |
585 | vmem = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, |
586 | get_order(vmem_size)); | |
a2ed00da MR |
587 | if (!vmem) { |
588 | dev_err(&client->dev, "Couldn't allocate graphical memory.\n"); | |
589 | ret = -ENOMEM; | |
590 | goto fb_alloc_error; | |
591 | } | |
592 | ||
3277e0bb TN |
593 | ssd1307fb_defio = devm_kzalloc(&client->dev, sizeof(struct fb_deferred_io), GFP_KERNEL); |
594 | if (!ssd1307fb_defio) { | |
595 | dev_err(&client->dev, "Couldn't allocate deferred io.\n"); | |
596 | ret = -ENOMEM; | |
597 | goto fb_alloc_error; | |
598 | } | |
599 | ||
600 | ssd1307fb_defio->delay = HZ / refreshrate; | |
601 | ssd1307fb_defio->deferred_io = ssd1307fb_deferred_io; | |
602 | ||
a2ed00da MR |
603 | info->fbops = &ssd1307fb_ops; |
604 | info->fix = ssd1307fb_fix; | |
bbc79089 | 605 | info->fix.line_length = par->width / 8; |
3277e0bb | 606 | info->fbdefio = ssd1307fb_defio; |
a2ed00da MR |
607 | |
608 | info->var = ssd1307fb_var; | |
bbc79089 MR |
609 | info->var.xres = par->width; |
610 | info->var.xres_virtual = par->width; | |
611 | info->var.yres = par->height; | |
612 | info->var.yres_virtual = par->height; | |
613 | ||
a2ed00da MR |
614 | info->var.red.length = 1; |
615 | info->var.red.offset = 0; | |
616 | info->var.green.length = 1; | |
617 | info->var.green.offset = 0; | |
618 | info->var.blue.length = 1; | |
619 | info->var.blue.offset = 0; | |
620 | ||
621 | info->screen_base = (u8 __force __iomem *)vmem; | |
258c0ea2 | 622 | info->fix.smem_start = __pa(vmem); |
a2ed00da MR |
623 | info->fix.smem_len = vmem_size; |
624 | ||
625 | fb_deferred_io_init(info); | |
626 | ||
a2ed00da MR |
627 | ret = devm_gpio_request_one(&client->dev, par->reset, |
628 | GPIOF_OUT_INIT_HIGH, | |
629 | "oled-reset"); | |
630 | if (ret) { | |
631 | dev_err(&client->dev, | |
632 | "failed to request gpio %d: %d\n", | |
633 | par->reset, ret); | |
634 | goto reset_oled_error; | |
635 | } | |
636 | ||
a2ed00da MR |
637 | i2c_set_clientdata(client, info); |
638 | ||
639 | /* Reset the screen */ | |
640 | gpio_set_value(par->reset, 0); | |
641 | udelay(4); | |
642 | gpio_set_value(par->reset, 1); | |
643 | udelay(4); | |
644 | ||
c89eacfc TN |
645 | ret = ssd1307fb_init(par); |
646 | if (ret) | |
647 | goto reset_oled_error; | |
a2ed00da | 648 | |
bbc79089 MR |
649 | ret = register_framebuffer(info); |
650 | if (ret) { | |
651 | dev_err(&client->dev, "Couldn't register the framebuffer\n"); | |
652 | goto panel_init_error; | |
a2ed00da MR |
653 | } |
654 | ||
6ed5e2db TN |
655 | snprintf(bl_name, sizeof(bl_name), "ssd1307fb%d", info->node); |
656 | bl = backlight_device_register(bl_name, &client->dev, par, | |
657 | &ssd1307fb_bl_ops, NULL); | |
6ed5e2db TN |
658 | if (IS_ERR(bl)) { |
659 | dev_err(&client->dev, "unable to register backlight device: %ld\n", | |
660 | PTR_ERR(bl)); | |
661 | goto bl_init_error; | |
662 | } | |
c2b00024 DC |
663 | |
664 | bl->props.brightness = par->contrast; | |
665 | bl->props.max_brightness = MAX_CONTRAST; | |
666 | info->bl_dev = bl; | |
667 | ||
a2ed00da MR |
668 | dev_info(&client->dev, "fb%d: %s framebuffer device registered, using %d bytes of video memory\n", info->node, info->fix.id, vmem_size); |
669 | ||
670 | return 0; | |
671 | ||
6ed5e2db TN |
672 | bl_init_error: |
673 | unregister_framebuffer(info); | |
bbc79089 | 674 | panel_init_error: |
c89eacfc TN |
675 | if (par->device_info->need_pwm) { |
676 | pwm_disable(par->pwm); | |
677 | pwm_put(par->pwm); | |
678 | }; | |
a2ed00da MR |
679 | reset_oled_error: |
680 | fb_deferred_io_cleanup(info); | |
681 | fb_alloc_error: | |
682 | framebuffer_release(info); | |
683 | return ret; | |
684 | } | |
685 | ||
48c68c4f | 686 | static int ssd1307fb_remove(struct i2c_client *client) |
a2ed00da MR |
687 | { |
688 | struct fb_info *info = i2c_get_clientdata(client); | |
689 | struct ssd1307fb_par *par = info->par; | |
690 | ||
13bad597 TN |
691 | ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_OFF); |
692 | ||
6ed5e2db TN |
693 | backlight_device_unregister(info->bl_dev); |
694 | ||
a2ed00da | 695 | unregister_framebuffer(info); |
c89eacfc TN |
696 | if (par->device_info->need_pwm) { |
697 | pwm_disable(par->pwm); | |
698 | pwm_put(par->pwm); | |
699 | }; | |
a2ed00da | 700 | fb_deferred_io_cleanup(info); |
facd94bc | 701 | __free_pages(__va(info->fix.smem_start), get_order(info->fix.smem_len)); |
a2ed00da MR |
702 | framebuffer_release(info); |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
707 | static const struct i2c_device_id ssd1307fb_i2c_id[] = { | |
5f2d36b3 | 708 | { "ssd1305fb", 0 }, |
bbc79089 | 709 | { "ssd1306fb", 0 }, |
a2ed00da MR |
710 | { "ssd1307fb", 0 }, |
711 | { } | |
712 | }; | |
713 | MODULE_DEVICE_TABLE(i2c, ssd1307fb_i2c_id); | |
714 | ||
a2ed00da MR |
715 | static struct i2c_driver ssd1307fb_driver = { |
716 | .probe = ssd1307fb_probe, | |
48c68c4f | 717 | .remove = ssd1307fb_remove, |
a2ed00da MR |
718 | .id_table = ssd1307fb_i2c_id, |
719 | .driver = { | |
720 | .name = "ssd1307fb", | |
d71f8cdf | 721 | .of_match_table = ssd1307fb_of_match, |
a2ed00da MR |
722 | }, |
723 | }; | |
724 | ||
725 | module_i2c_driver(ssd1307fb_driver); | |
726 | ||
a895d57d | 727 | MODULE_DESCRIPTION("FB driver for the Solomon SSD1307 OLED controller"); |
a2ed00da MR |
728 | MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); |
729 | MODULE_LICENSE("GPL"); |