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> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/i2c.h> | |
12 | #include <linux/fb.h> | |
13 | #include <linux/uaccess.h> | |
14 | #include <linux/of_device.h> | |
15 | #include <linux/of_gpio.h> | |
16 | #include <linux/pwm.h> | |
17 | #include <linux/delay.h> | |
18 | ||
a2ed00da MR |
19 | #define SSD1307FB_DATA 0x40 |
20 | #define SSD1307FB_COMMAND 0x80 | |
21 | ||
301bc067 MR |
22 | #define SSD1307FB_SET_ADDRESS_MODE 0x20 |
23 | #define SSD1307FB_SET_ADDRESS_MODE_HORIZONTAL (0x00) | |
24 | #define SSD1307FB_SET_ADDRESS_MODE_VERTICAL (0x01) | |
25 | #define SSD1307FB_SET_ADDRESS_MODE_PAGE (0x02) | |
26 | #define SSD1307FB_SET_COL_RANGE 0x21 | |
27 | #define SSD1307FB_SET_PAGE_RANGE 0x22 | |
a2ed00da | 28 | #define SSD1307FB_CONTRAST 0x81 |
bbc79089 | 29 | #define SSD1307FB_CHARGE_PUMP 0x8d |
a2ed00da MR |
30 | #define SSD1307FB_SEG_REMAP_ON 0xa1 |
31 | #define SSD1307FB_DISPLAY_OFF 0xae | |
bbc79089 | 32 | #define SSD1307FB_SET_MULTIPLEX_RATIO 0xa8 |
a2ed00da MR |
33 | #define SSD1307FB_DISPLAY_ON 0xaf |
34 | #define SSD1307FB_START_PAGE_ADDRESS 0xb0 | |
bbc79089 MR |
35 | #define SSD1307FB_SET_DISPLAY_OFFSET 0xd3 |
36 | #define SSD1307FB_SET_CLOCK_FREQ 0xd5 | |
37 | #define SSD1307FB_SET_PRECHARGE_PERIOD 0xd9 | |
38 | #define SSD1307FB_SET_COM_PINS_CONFIG 0xda | |
39 | #define SSD1307FB_SET_VCOMH 0xdb | |
40 | ||
41 | struct ssd1307fb_par; | |
42 | ||
43 | struct ssd1307fb_ops { | |
44 | int (*init)(struct ssd1307fb_par *); | |
45 | int (*remove)(struct ssd1307fb_par *); | |
46 | }; | |
a2ed00da MR |
47 | |
48 | struct ssd1307fb_par { | |
49 | struct i2c_client *client; | |
bbc79089 | 50 | u32 height; |
a2ed00da | 51 | struct fb_info *info; |
bbc79089 MR |
52 | struct ssd1307fb_ops *ops; |
53 | u32 page_offset; | |
a2ed00da MR |
54 | struct pwm_device *pwm; |
55 | u32 pwm_period; | |
56 | int reset; | |
bbc79089 | 57 | u32 width; |
a2ed00da MR |
58 | }; |
59 | ||
9f7714d4 MR |
60 | struct ssd1307fb_array { |
61 | u8 type; | |
62 | u8 data[0]; | |
63 | }; | |
64 | ||
48c68c4f | 65 | static struct fb_fix_screeninfo ssd1307fb_fix = { |
a2ed00da MR |
66 | .id = "Solomon SSD1307", |
67 | .type = FB_TYPE_PACKED_PIXELS, | |
68 | .visual = FB_VISUAL_MONO10, | |
69 | .xpanstep = 0, | |
70 | .ypanstep = 0, | |
71 | .ywrapstep = 0, | |
a2ed00da MR |
72 | .accel = FB_ACCEL_NONE, |
73 | }; | |
74 | ||
48c68c4f | 75 | static struct fb_var_screeninfo ssd1307fb_var = { |
a2ed00da MR |
76 | .bits_per_pixel = 1, |
77 | }; | |
78 | ||
9f7714d4 | 79 | static struct ssd1307fb_array *ssd1307fb_alloc_array(u32 len, u8 type) |
a2ed00da | 80 | { |
9f7714d4 | 81 | struct ssd1307fb_array *array; |
a2ed00da | 82 | |
9f7714d4 MR |
83 | array = kzalloc(sizeof(struct ssd1307fb_array) + len, GFP_KERNEL); |
84 | if (!array) | |
85 | return NULL; | |
a2ed00da | 86 | |
9f7714d4 | 87 | array->type = type; |
a2ed00da | 88 | |
9f7714d4 | 89 | return array; |
a2ed00da MR |
90 | } |
91 | ||
9f7714d4 MR |
92 | static int ssd1307fb_write_array(struct i2c_client *client, |
93 | struct ssd1307fb_array *array, u32 len) | |
a2ed00da | 94 | { |
9f7714d4 MR |
95 | int ret; |
96 | ||
97 | len += sizeof(struct ssd1307fb_array); | |
98 | ||
99 | ret = i2c_master_send(client, (u8 *)array, len); | |
100 | if (ret != len) { | |
101 | dev_err(&client->dev, "Couldn't send I2C command.\n"); | |
102 | return ret; | |
103 | } | |
104 | ||
105 | return 0; | |
a2ed00da MR |
106 | } |
107 | ||
108 | static inline int ssd1307fb_write_cmd(struct i2c_client *client, u8 cmd) | |
109 | { | |
9f7714d4 MR |
110 | struct ssd1307fb_array *array; |
111 | int ret; | |
a2ed00da | 112 | |
9f7714d4 MR |
113 | array = ssd1307fb_alloc_array(1, SSD1307FB_COMMAND); |
114 | if (!array) | |
115 | return -ENOMEM; | |
116 | ||
117 | array->data[0] = cmd; | |
118 | ||
119 | ret = ssd1307fb_write_array(client, array, 1); | |
120 | kfree(array); | |
121 | ||
122 | return ret; | |
a2ed00da MR |
123 | } |
124 | ||
125 | static inline int ssd1307fb_write_data(struct i2c_client *client, u8 data) | |
126 | { | |
9f7714d4 MR |
127 | struct ssd1307fb_array *array; |
128 | int ret; | |
129 | ||
130 | array = ssd1307fb_alloc_array(1, SSD1307FB_DATA); | |
131 | if (!array) | |
132 | return -ENOMEM; | |
133 | ||
134 | array->data[0] = data; | |
135 | ||
136 | ret = ssd1307fb_write_array(client, array, 1); | |
137 | kfree(array); | |
138 | ||
139 | return ret; | |
a2ed00da MR |
140 | } |
141 | ||
142 | static void ssd1307fb_update_display(struct ssd1307fb_par *par) | |
143 | { | |
301bc067 | 144 | struct ssd1307fb_array *array; |
a2ed00da MR |
145 | u8 *vmem = par->info->screen_base; |
146 | int i, j, k; | |
147 | ||
301bc067 MR |
148 | array = ssd1307fb_alloc_array(par->width * par->height / 8, |
149 | SSD1307FB_DATA); | |
150 | if (!array) | |
151 | return; | |
152 | ||
a2ed00da MR |
153 | /* |
154 | * The screen is divided in pages, each having a height of 8 | |
155 | * pixels, and the width of the screen. When sending a byte of | |
156 | * data to the controller, it gives the 8 bits for the current | |
157 | * column. I.e, the first byte are the 8 bits of the first | |
158 | * column, then the 8 bits for the second column, etc. | |
159 | * | |
160 | * | |
161 | * Representation of the screen, assuming it is 5 bits | |
162 | * wide. Each letter-number combination is a bit that controls | |
163 | * one pixel. | |
164 | * | |
165 | * A0 A1 A2 A3 A4 | |
166 | * B0 B1 B2 B3 B4 | |
167 | * C0 C1 C2 C3 C4 | |
168 | * D0 D1 D2 D3 D4 | |
169 | * E0 E1 E2 E3 E4 | |
170 | * F0 F1 F2 F3 F4 | |
171 | * G0 G1 G2 G3 G4 | |
172 | * H0 H1 H2 H3 H4 | |
173 | * | |
174 | * If you want to update this screen, you need to send 5 bytes: | |
175 | * (1) A0 B0 C0 D0 E0 F0 G0 H0 | |
176 | * (2) A1 B1 C1 D1 E1 F1 G1 H1 | |
177 | * (3) A2 B2 C2 D2 E2 F2 G2 H2 | |
178 | * (4) A3 B3 C3 D3 E3 F3 G3 H3 | |
179 | * (5) A4 B4 C4 D4 E4 F4 G4 H4 | |
180 | */ | |
181 | ||
bbc79089 | 182 | for (i = 0; i < (par->height / 8); i++) { |
bbc79089 | 183 | for (j = 0; j < par->width; j++) { |
301bc067 MR |
184 | u32 array_idx = i * par->width + j; |
185 | array->data[array_idx] = 0; | |
a2ed00da | 186 | for (k = 0; k < 8; k++) { |
bbc79089 MR |
187 | u32 page_length = par->width * i; |
188 | u32 index = page_length + (par->width * k + j) / 8; | |
a2ed00da | 189 | u8 byte = *(vmem + index); |
552f0cc7 MR |
190 | u8 bit = byte & (1 << (j % 8)); |
191 | bit = bit >> (j % 8); | |
301bc067 | 192 | array->data[array_idx] |= bit << k; |
a2ed00da | 193 | } |
a2ed00da MR |
194 | } |
195 | } | |
301bc067 MR |
196 | |
197 | ssd1307fb_write_array(par->client, array, par->width * par->height / 8); | |
198 | kfree(array); | |
a2ed00da MR |
199 | } |
200 | ||
201 | ||
202 | static ssize_t ssd1307fb_write(struct fb_info *info, const char __user *buf, | |
203 | size_t count, loff_t *ppos) | |
204 | { | |
205 | struct ssd1307fb_par *par = info->par; | |
206 | unsigned long total_size; | |
207 | unsigned long p = *ppos; | |
208 | u8 __iomem *dst; | |
209 | ||
210 | total_size = info->fix.smem_len; | |
211 | ||
212 | if (p > total_size) | |
213 | return -EINVAL; | |
214 | ||
215 | if (count + p > total_size) | |
216 | count = total_size - p; | |
217 | ||
218 | if (!count) | |
219 | return -EINVAL; | |
220 | ||
221 | dst = (void __force *) (info->screen_base + p); | |
222 | ||
223 | if (copy_from_user(dst, buf, count)) | |
224 | return -EFAULT; | |
225 | ||
226 | ssd1307fb_update_display(par); | |
227 | ||
228 | *ppos += count; | |
229 | ||
230 | return count; | |
231 | } | |
232 | ||
233 | static void ssd1307fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) | |
234 | { | |
235 | struct ssd1307fb_par *par = info->par; | |
236 | sys_fillrect(info, rect); | |
237 | ssd1307fb_update_display(par); | |
238 | } | |
239 | ||
240 | static void ssd1307fb_copyarea(struct fb_info *info, const struct fb_copyarea *area) | |
241 | { | |
242 | struct ssd1307fb_par *par = info->par; | |
243 | sys_copyarea(info, area); | |
244 | ssd1307fb_update_display(par); | |
245 | } | |
246 | ||
247 | static void ssd1307fb_imageblit(struct fb_info *info, const struct fb_image *image) | |
248 | { | |
249 | struct ssd1307fb_par *par = info->par; | |
250 | sys_imageblit(info, image); | |
251 | ssd1307fb_update_display(par); | |
252 | } | |
253 | ||
254 | static struct fb_ops ssd1307fb_ops = { | |
255 | .owner = THIS_MODULE, | |
256 | .fb_read = fb_sys_read, | |
257 | .fb_write = ssd1307fb_write, | |
258 | .fb_fillrect = ssd1307fb_fillrect, | |
259 | .fb_copyarea = ssd1307fb_copyarea, | |
260 | .fb_imageblit = ssd1307fb_imageblit, | |
261 | }; | |
262 | ||
263 | static void ssd1307fb_deferred_io(struct fb_info *info, | |
264 | struct list_head *pagelist) | |
265 | { | |
266 | ssd1307fb_update_display(info->par); | |
267 | } | |
268 | ||
269 | static struct fb_deferred_io ssd1307fb_defio = { | |
270 | .delay = HZ, | |
271 | .deferred_io = ssd1307fb_deferred_io, | |
272 | }; | |
273 | ||
bbc79089 MR |
274 | static int ssd1307fb_ssd1307_init(struct ssd1307fb_par *par) |
275 | { | |
276 | int ret; | |
277 | ||
278 | par->pwm = pwm_get(&par->client->dev, NULL); | |
279 | if (IS_ERR(par->pwm)) { | |
280 | dev_err(&par->client->dev, "Could not get PWM from device tree!\n"); | |
281 | return PTR_ERR(par->pwm); | |
282 | } | |
283 | ||
284 | par->pwm_period = pwm_get_period(par->pwm); | |
285 | /* Enable the PWM */ | |
286 | pwm_config(par->pwm, par->pwm_period / 2, par->pwm_period); | |
287 | pwm_enable(par->pwm); | |
288 | ||
289 | dev_dbg(&par->client->dev, "Using PWM%d with a %dns period.\n", | |
290 | par->pwm->pwm, par->pwm_period); | |
291 | ||
292 | /* Map column 127 of the OLED to segment 0 */ | |
293 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SEG_REMAP_ON); | |
294 | if (ret < 0) | |
295 | return ret; | |
296 | ||
297 | /* Turn on the display */ | |
298 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON); | |
299 | if (ret < 0) | |
300 | return ret; | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
305 | static int ssd1307fb_ssd1307_remove(struct ssd1307fb_par *par) | |
306 | { | |
307 | pwm_disable(par->pwm); | |
308 | pwm_put(par->pwm); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static struct ssd1307fb_ops ssd1307fb_ssd1307_ops = { | |
313 | .init = ssd1307fb_ssd1307_init, | |
314 | .remove = ssd1307fb_ssd1307_remove, | |
315 | }; | |
316 | ||
317 | static int ssd1307fb_ssd1306_init(struct ssd1307fb_par *par) | |
318 | { | |
319 | int ret; | |
320 | ||
321 | /* Set initial contrast */ | |
322 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CONTRAST); | |
323 | ret = ret & ssd1307fb_write_cmd(par->client, 0x7f); | |
324 | if (ret < 0) | |
325 | return ret; | |
326 | ||
327 | /* Set COM direction */ | |
328 | ret = ssd1307fb_write_cmd(par->client, 0xc8); | |
329 | if (ret < 0) | |
330 | return ret; | |
331 | ||
332 | /* Set segment re-map */ | |
333 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SEG_REMAP_ON); | |
334 | if (ret < 0) | |
335 | return ret; | |
336 | ||
337 | /* Set multiplex ratio value */ | |
338 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_MULTIPLEX_RATIO); | |
339 | ret = ret & ssd1307fb_write_cmd(par->client, par->height - 1); | |
340 | if (ret < 0) | |
341 | return ret; | |
342 | ||
343 | /* set display offset value */ | |
344 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_DISPLAY_OFFSET); | |
345 | ret = ssd1307fb_write_cmd(par->client, 0x20); | |
346 | if (ret < 0) | |
347 | return ret; | |
348 | ||
349 | /* Set clock frequency */ | |
350 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_CLOCK_FREQ); | |
351 | ret = ret & ssd1307fb_write_cmd(par->client, 0xf0); | |
352 | if (ret < 0) | |
353 | return ret; | |
354 | ||
355 | /* Set precharge period in number of ticks from the internal clock */ | |
356 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PRECHARGE_PERIOD); | |
357 | ret = ret & ssd1307fb_write_cmd(par->client, 0x22); | |
358 | if (ret < 0) | |
359 | return ret; | |
360 | ||
361 | /* Set COM pins configuration */ | |
362 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COM_PINS_CONFIG); | |
363 | ret = ret & ssd1307fb_write_cmd(par->client, 0x22); | |
364 | if (ret < 0) | |
365 | return ret; | |
366 | ||
367 | /* Set VCOMH */ | |
368 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_VCOMH); | |
369 | ret = ret & ssd1307fb_write_cmd(par->client, 0x49); | |
370 | if (ret < 0) | |
371 | return ret; | |
372 | ||
373 | /* Turn on the DC-DC Charge Pump */ | |
374 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CHARGE_PUMP); | |
375 | ret = ret & ssd1307fb_write_cmd(par->client, 0x14); | |
376 | if (ret < 0) | |
377 | return ret; | |
378 | ||
301bc067 MR |
379 | /* Switch to horizontal addressing mode */ |
380 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_ADDRESS_MODE); | |
381 | ret = ret & ssd1307fb_write_cmd(par->client, | |
382 | SSD1307FB_SET_ADDRESS_MODE_HORIZONTAL); | |
383 | if (ret < 0) | |
384 | return ret; | |
385 | ||
386 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COL_RANGE); | |
387 | ret = ret & ssd1307fb_write_cmd(par->client, 0x0); | |
388 | ret = ret & ssd1307fb_write_cmd(par->client, par->width - 1); | |
389 | if (ret < 0) | |
390 | return ret; | |
391 | ||
392 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PAGE_RANGE); | |
393 | ret = ret & ssd1307fb_write_cmd(par->client, 0x0); | |
394 | ret = ret & ssd1307fb_write_cmd(par->client, | |
395 | par->page_offset + (par->height / 8) - 1); | |
396 | if (ret < 0) | |
397 | return ret; | |
398 | ||
bbc79089 MR |
399 | /* Turn on the display */ |
400 | ret = ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON); | |
401 | if (ret < 0) | |
402 | return ret; | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | static struct ssd1307fb_ops ssd1307fb_ssd1306_ops = { | |
408 | .init = ssd1307fb_ssd1306_init, | |
409 | }; | |
410 | ||
411 | static const struct of_device_id ssd1307fb_of_match[] = { | |
412 | { | |
413 | .compatible = "solomon,ssd1306fb-i2c", | |
414 | .data = (void *)&ssd1307fb_ssd1306_ops, | |
415 | }, | |
416 | { | |
417 | .compatible = "solomon,ssd1307fb-i2c", | |
418 | .data = (void *)&ssd1307fb_ssd1307_ops, | |
419 | }, | |
420 | {}, | |
421 | }; | |
422 | MODULE_DEVICE_TABLE(of, ssd1307fb_of_match); | |
423 | ||
48c68c4f GKH |
424 | static int ssd1307fb_probe(struct i2c_client *client, |
425 | const struct i2c_device_id *id) | |
a2ed00da MR |
426 | { |
427 | struct fb_info *info; | |
bbc79089 MR |
428 | struct device_node *node = client->dev.of_node; |
429 | u32 vmem_size; | |
a2ed00da MR |
430 | struct ssd1307fb_par *par; |
431 | u8 *vmem; | |
432 | int ret; | |
433 | ||
bbc79089 | 434 | if (!node) { |
a2ed00da MR |
435 | dev_err(&client->dev, "No device tree data found!\n"); |
436 | return -EINVAL; | |
437 | } | |
438 | ||
439 | info = framebuffer_alloc(sizeof(struct ssd1307fb_par), &client->dev); | |
440 | if (!info) { | |
441 | dev_err(&client->dev, "Couldn't allocate framebuffer.\n"); | |
442 | return -ENOMEM; | |
443 | } | |
444 | ||
bbc79089 MR |
445 | par = info->par; |
446 | par->info = info; | |
447 | par->client = client; | |
448 | ||
449 | par->ops = (struct ssd1307fb_ops *)of_match_device(ssd1307fb_of_match, | |
450 | &client->dev)->data; | |
451 | ||
452 | par->reset = of_get_named_gpio(client->dev.of_node, | |
453 | "reset-gpios", 0); | |
454 | if (!gpio_is_valid(par->reset)) { | |
455 | ret = -EINVAL; | |
456 | goto fb_alloc_error; | |
457 | } | |
458 | ||
459 | if (of_property_read_u32(node, "solomon,width", &par->width)) | |
460 | par->width = 96; | |
461 | ||
462 | if (of_property_read_u32(node, "solomon,height", &par->height)) | |
463 | par->width = 16; | |
464 | ||
465 | if (of_property_read_u32(node, "solomon,page-offset", &par->page_offset)) | |
466 | par->page_offset = 1; | |
467 | ||
468 | vmem_size = par->width * par->height / 8; | |
469 | ||
a2ed00da MR |
470 | vmem = devm_kzalloc(&client->dev, vmem_size, GFP_KERNEL); |
471 | if (!vmem) { | |
472 | dev_err(&client->dev, "Couldn't allocate graphical memory.\n"); | |
473 | ret = -ENOMEM; | |
474 | goto fb_alloc_error; | |
475 | } | |
476 | ||
477 | info->fbops = &ssd1307fb_ops; | |
478 | info->fix = ssd1307fb_fix; | |
bbc79089 | 479 | info->fix.line_length = par->width / 8; |
a2ed00da MR |
480 | info->fbdefio = &ssd1307fb_defio; |
481 | ||
482 | info->var = ssd1307fb_var; | |
bbc79089 MR |
483 | info->var.xres = par->width; |
484 | info->var.xres_virtual = par->width; | |
485 | info->var.yres = par->height; | |
486 | info->var.yres_virtual = par->height; | |
487 | ||
a2ed00da MR |
488 | info->var.red.length = 1; |
489 | info->var.red.offset = 0; | |
490 | info->var.green.length = 1; | |
491 | info->var.green.offset = 0; | |
492 | info->var.blue.length = 1; | |
493 | info->var.blue.offset = 0; | |
494 | ||
495 | info->screen_base = (u8 __force __iomem *)vmem; | |
496 | info->fix.smem_start = (unsigned long)vmem; | |
497 | info->fix.smem_len = vmem_size; | |
498 | ||
499 | fb_deferred_io_init(info); | |
500 | ||
a2ed00da MR |
501 | ret = devm_gpio_request_one(&client->dev, par->reset, |
502 | GPIOF_OUT_INIT_HIGH, | |
503 | "oled-reset"); | |
504 | if (ret) { | |
505 | dev_err(&client->dev, | |
506 | "failed to request gpio %d: %d\n", | |
507 | par->reset, ret); | |
508 | goto reset_oled_error; | |
509 | } | |
510 | ||
a2ed00da MR |
511 | i2c_set_clientdata(client, info); |
512 | ||
513 | /* Reset the screen */ | |
514 | gpio_set_value(par->reset, 0); | |
515 | udelay(4); | |
516 | gpio_set_value(par->reset, 1); | |
517 | udelay(4); | |
518 | ||
bbc79089 MR |
519 | if (par->ops->init) { |
520 | ret = par->ops->init(par); | |
521 | if (ret) | |
522 | goto reset_oled_error; | |
a2ed00da MR |
523 | } |
524 | ||
bbc79089 MR |
525 | ret = register_framebuffer(info); |
526 | if (ret) { | |
527 | dev_err(&client->dev, "Couldn't register the framebuffer\n"); | |
528 | goto panel_init_error; | |
a2ed00da MR |
529 | } |
530 | ||
531 | dev_info(&client->dev, "fb%d: %s framebuffer device registered, using %d bytes of video memory\n", info->node, info->fix.id, vmem_size); | |
532 | ||
533 | return 0; | |
534 | ||
bbc79089 MR |
535 | panel_init_error: |
536 | if (par->ops->remove) | |
537 | par->ops->remove(par); | |
a2ed00da MR |
538 | reset_oled_error: |
539 | fb_deferred_io_cleanup(info); | |
540 | fb_alloc_error: | |
541 | framebuffer_release(info); | |
542 | return ret; | |
543 | } | |
544 | ||
48c68c4f | 545 | static int ssd1307fb_remove(struct i2c_client *client) |
a2ed00da MR |
546 | { |
547 | struct fb_info *info = i2c_get_clientdata(client); | |
548 | struct ssd1307fb_par *par = info->par; | |
549 | ||
550 | unregister_framebuffer(info); | |
bbc79089 MR |
551 | if (par->ops->remove) |
552 | par->ops->remove(par); | |
a2ed00da MR |
553 | fb_deferred_io_cleanup(info); |
554 | framebuffer_release(info); | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static const struct i2c_device_id ssd1307fb_i2c_id[] = { | |
bbc79089 | 560 | { "ssd1306fb", 0 }, |
a2ed00da MR |
561 | { "ssd1307fb", 0 }, |
562 | { } | |
563 | }; | |
564 | MODULE_DEVICE_TABLE(i2c, ssd1307fb_i2c_id); | |
565 | ||
a2ed00da MR |
566 | static struct i2c_driver ssd1307fb_driver = { |
567 | .probe = ssd1307fb_probe, | |
48c68c4f | 568 | .remove = ssd1307fb_remove, |
a2ed00da MR |
569 | .id_table = ssd1307fb_i2c_id, |
570 | .driver = { | |
571 | .name = "ssd1307fb", | |
572 | .of_match_table = of_match_ptr(ssd1307fb_of_match), | |
573 | .owner = THIS_MODULE, | |
574 | }, | |
575 | }; | |
576 | ||
577 | module_i2c_driver(ssd1307fb_driver); | |
578 | ||
a895d57d | 579 | MODULE_DESCRIPTION("FB driver for the Solomon SSD1307 OLED controller"); |
a2ed00da MR |
580 | MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); |
581 | MODULE_LICENSE("GPL"); |