1 | /* |
2 | * linux/drivers/video/arcfb.c -- FB driver for Arc monochrome LCD board |
3 | * |
4 | * Copyright (C) 2005, Jaya Kumar <jayalk@intworks.biz> |
5 | * |
6 | * This file is subject to the terms and conditions of the GNU General Public |
7 | * License. See the file COPYING in the main directory of this archive for |
8 | * more details. |
9 | * |
10 | * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven. |
11 | * |
12 | * This driver was written to be used with the Arc LCD board. Arc uses a |
13 | * set of KS108 chips that control individual 64x64 LCD matrices. The board |
14 | * can be paneled in a variety of setups such as 2x1=128x64, 4x4=256x256 and |
15 | * so on. The interface between the board and the host is TTL based GPIO. The |
16 | * GPIO requirements are 8 writable data lines and 4+n lines for control. On a |
17 | * GPIO-less system, the board can be tested by connecting the respective sigs |
18 | * up to a parallel port connector. The driver requires the IO addresses for |
19 | * data and control GPIO at load time. It is unable to probe for the |
20 | * existence of the LCD so it must be told at load time whether it should |
21 | * be enabled or not. |
22 | * |
23 | * Todo: |
24 | * - testing with 4x4 |
25 | * - testing with interrupt hw |
26 | * |
27 | * General notes: |
28 | * - User must set tuhold. It's in microseconds. According to the 108 spec, |
29 | * the hold time is supposed to be at least 1 microsecond. |
30 | * - User must set num_cols=x num_rows=y, eg: x=2 means 128 |
31 | * - User must set arcfb_enable=1 to enable it |
32 | * - User must set dio_addr=0xIOADDR cio_addr=0xIOADDR |
33 | * |
34 | */ |
35 | |
36 | #include <linux/module.h> |
37 | #include <linux/kernel.h> |
38 | #include <linux/errno.h> |
39 | #include <linux/string.h> |
40 | #include <linux/mm.h> |
41 | #include <linux/vmalloc.h> |
42 | #include <linux/delay.h> |
43 | #include <linux/interrupt.h> |
44 | #include <linux/io.h> |
45 | #include <linux/fb.h> |
46 | #include <linux/init.h> |
47 | #include <linux/arcfb.h> |
48 | #include <linux/platform_device.h> |
49 | |
50 | #include <linux/uaccess.h> |
51 | |
52 | #define floor8(a) (a&(~0x07)) |
53 | #define floorXres(a,xres) (a&(~(xres - 1))) |
54 | #define iceil8(a) (((int)((a+7)/8))*8) |
55 | #define ceil64(a) (a|0x3F) |
56 | #define ceilXres(a,xres) (a|(xres - 1)) |
57 | |
58 | /* ks108 chipset specific defines and code */ |
59 | |
60 | #define KS_SET_DPY_START_LINE 0xC0 |
61 | #define KS_SET_PAGE_NUM 0xB8 |
62 | #define KS_SET_X 0x40 |
63 | #define KS_CEHI 0x01 |
64 | #define KS_CELO 0x00 |
65 | #define KS_SEL_CMD 0x08 |
66 | #define KS_SEL_DATA 0x00 |
67 | #define KS_DPY_ON 0x3F |
68 | #define KS_DPY_OFF 0x3E |
69 | #define KS_INTACK 0x40 |
70 | #define KS_CLRINT 0x02 |
71 | |
72 | struct arcfb_par { |
73 | unsigned long dio_addr; |
74 | unsigned long cio_addr; |
75 | unsigned long c2io_addr; |
76 | atomic_t ref_count; |
77 | unsigned char cslut[9]; |
78 | struct fb_info *info; |
79 | unsigned int irq; |
80 | spinlock_t lock; |
81 | }; |
82 | |
83 | static const struct fb_fix_screeninfo arcfb_fix = { |
84 | .id = "arcfb" , |
85 | .type = FB_TYPE_PACKED_PIXELS, |
86 | .visual = FB_VISUAL_MONO01, |
87 | .xpanstep = 0, |
88 | .ypanstep = 1, |
89 | .ywrapstep = 0, |
90 | .accel = FB_ACCEL_NONE, |
91 | }; |
92 | |
93 | static const struct fb_var_screeninfo arcfb_var = { |
94 | .xres = 128, |
95 | .yres = 64, |
96 | .xres_virtual = 128, |
97 | .yres_virtual = 64, |
98 | .bits_per_pixel = 1, |
99 | .nonstd = 1, |
100 | }; |
101 | |
102 | static unsigned long num_cols; |
103 | static unsigned long num_rows; |
104 | static unsigned long dio_addr; |
105 | static unsigned long cio_addr; |
106 | static unsigned long c2io_addr; |
107 | static unsigned long splashval; |
108 | static unsigned long tuhold; |
109 | static unsigned int nosplash; |
110 | static unsigned int arcfb_enable; |
111 | static unsigned int irq; |
112 | |
113 | static DECLARE_WAIT_QUEUE_HEAD(arcfb_waitq); |
114 | |
115 | static void ks108_writeb_ctl(struct arcfb_par *par, |
116 | unsigned int chipindex, unsigned char value) |
117 | { |
118 | unsigned char chipselval = par->cslut[chipindex]; |
119 | |
120 | outb(value: chipselval|KS_CEHI|KS_SEL_CMD, port: par->cio_addr); |
121 | outb(value, port: par->dio_addr); |
122 | udelay(tuhold); |
123 | outb(value: chipselval|KS_CELO|KS_SEL_CMD, port: par->cio_addr); |
124 | } |
125 | |
126 | static void ks108_writeb_mainctl(struct arcfb_par *par, unsigned char value) |
127 | { |
128 | |
129 | outb(value, port: par->cio_addr); |
130 | udelay(tuhold); |
131 | } |
132 | |
133 | static unsigned char ks108_readb_ctl2(struct arcfb_par *par) |
134 | { |
135 | return inb(port: par->c2io_addr); |
136 | } |
137 | |
138 | static void ks108_writeb_data(struct arcfb_par *par, |
139 | unsigned int chipindex, unsigned char value) |
140 | { |
141 | unsigned char chipselval = par->cslut[chipindex]; |
142 | |
143 | outb(value: chipselval|KS_CEHI|KS_SEL_DATA, port: par->cio_addr); |
144 | outb(value, port: par->dio_addr); |
145 | udelay(tuhold); |
146 | outb(value: chipselval|KS_CELO|KS_SEL_DATA, port: par->cio_addr); |
147 | } |
148 | |
149 | static void ks108_set_start_line(struct arcfb_par *par, |
150 | unsigned int chipindex, unsigned char y) |
151 | { |
152 | ks108_writeb_ctl(par, chipindex, KS_SET_DPY_START_LINE|y); |
153 | } |
154 | |
155 | static void ks108_set_yaddr(struct arcfb_par *par, |
156 | unsigned int chipindex, unsigned char y) |
157 | { |
158 | ks108_writeb_ctl(par, chipindex, KS_SET_PAGE_NUM|y); |
159 | } |
160 | |
161 | static void ks108_set_xaddr(struct arcfb_par *par, |
162 | unsigned int chipindex, unsigned char x) |
163 | { |
164 | ks108_writeb_ctl(par, chipindex, KS_SET_X|x); |
165 | } |
166 | |
167 | static void ks108_clear_lcd(struct arcfb_par *par, unsigned int chipindex) |
168 | { |
169 | int i,j; |
170 | |
171 | for (i = 0; i <= 8; i++) { |
172 | ks108_set_yaddr(par, chipindex, y: i); |
173 | ks108_set_xaddr(par, chipindex, x: 0); |
174 | for (j = 0; j < 64; j++) { |
175 | ks108_writeb_data(par, chipindex, |
176 | value: (unsigned char) splashval); |
177 | } |
178 | } |
179 | } |
180 | |
181 | /* main arcfb functions */ |
182 | |
183 | static int arcfb_open(struct fb_info *info, int user) |
184 | { |
185 | struct arcfb_par *par = info->par; |
186 | |
187 | atomic_inc(v: &par->ref_count); |
188 | return 0; |
189 | } |
190 | |
191 | static int arcfb_release(struct fb_info *info, int user) |
192 | { |
193 | struct arcfb_par *par = info->par; |
194 | int count = atomic_read(v: &par->ref_count); |
195 | |
196 | if (!count) |
197 | return -EINVAL; |
198 | atomic_dec(v: &par->ref_count); |
199 | return 0; |
200 | } |
201 | |
202 | static int arcfb_pan_display(struct fb_var_screeninfo *var, |
203 | struct fb_info *info) |
204 | { |
205 | int i; |
206 | struct arcfb_par *par = info->par; |
207 | |
208 | if ((var->vmode & FB_VMODE_YWRAP) && (var->yoffset < 64) |
209 | && (info->var.yres <= 64)) { |
210 | for (i = 0; i < num_cols; i++) { |
211 | ks108_set_start_line(par, chipindex: i, y: var->yoffset); |
212 | } |
213 | info->var.yoffset = var->yoffset; |
214 | return 0; |
215 | } |
216 | |
217 | return -EINVAL; |
218 | } |
219 | |
220 | static irqreturn_t arcfb_interrupt(int vec, void *dev_instance) |
221 | { |
222 | struct fb_info *info = dev_instance; |
223 | unsigned char ctl2status; |
224 | struct arcfb_par *par = info->par; |
225 | |
226 | ctl2status = ks108_readb_ctl2(par); |
227 | |
228 | if (!(ctl2status & KS_INTACK)) /* not arc generated interrupt */ |
229 | return IRQ_NONE; |
230 | |
231 | ks108_writeb_mainctl(par, KS_CLRINT); |
232 | |
233 | spin_lock(lock: &par->lock); |
234 | if (waitqueue_active(wq_head: &arcfb_waitq)) { |
235 | wake_up(&arcfb_waitq); |
236 | } |
237 | spin_unlock(lock: &par->lock); |
238 | |
239 | return IRQ_HANDLED; |
240 | } |
241 | |
242 | /* |
243 | * here we handle a specific page on the lcd. the complexity comes from |
244 | * the fact that the fb is laidout in 8xX vertical columns. we extract |
245 | * each write of 8 vertical pixels. then we shift out as we move along |
246 | * X. That's what rightshift does. bitmask selects the desired input bit. |
247 | */ |
248 | static void arcfb_lcd_update_page(struct arcfb_par *par, unsigned int upper, |
249 | unsigned int left, unsigned int right, unsigned int distance) |
250 | { |
251 | unsigned char *src; |
252 | unsigned int xindex, yindex, chipindex, linesize; |
253 | int i; |
254 | unsigned char val; |
255 | unsigned char bitmask, rightshift; |
256 | |
257 | xindex = left >> 6; |
258 | yindex = upper >> 6; |
259 | chipindex = (xindex + (yindex*num_cols)); |
260 | |
261 | ks108_set_yaddr(par, chipindex, y: upper/8); |
262 | |
263 | linesize = par->info->var.xres/8; |
264 | src = (unsigned char *)par->info->screen_buffer + (left/8) + |
265 | (upper * linesize); |
266 | ks108_set_xaddr(par, chipindex, x: left); |
267 | |
268 | bitmask=1; |
269 | rightshift=0; |
270 | while (left <= right) { |
271 | val = 0; |
272 | for (i = 0; i < 8; i++) { |
273 | if ( i > rightshift) { |
274 | val |= (*(src + (i*linesize)) & bitmask) |
275 | << (i - rightshift); |
276 | } else { |
277 | val |= (*(src + (i*linesize)) & bitmask) |
278 | >> (rightshift - i); |
279 | } |
280 | } |
281 | ks108_writeb_data(par, chipindex, value: val); |
282 | left++; |
283 | if (bitmask == 0x80) { |
284 | bitmask = 1; |
285 | src++; |
286 | rightshift=0; |
287 | } else { |
288 | bitmask <<= 1; |
289 | rightshift++; |
290 | } |
291 | } |
292 | } |
293 | |
294 | /* |
295 | * here we handle the entire vertical page of the update. we write across |
296 | * lcd chips. update_page uses the upper/left values to decide which |
297 | * chip to select for the right. upper is needed for setting the page |
298 | * desired for the write. |
299 | */ |
300 | static void arcfb_lcd_update_vert(struct arcfb_par *par, unsigned int top, |
301 | unsigned int bottom, unsigned int left, unsigned int right) |
302 | { |
303 | unsigned int distance, upper, lower; |
304 | |
305 | distance = (bottom - top) + 1; |
306 | upper = top; |
307 | lower = top + 7; |
308 | |
309 | while (distance > 0) { |
310 | distance -= 8; |
311 | arcfb_lcd_update_page(par, upper, left, right, distance: 8); |
312 | upper = lower + 1; |
313 | lower = upper + 7; |
314 | } |
315 | } |
316 | |
317 | /* |
318 | * here we handle horizontal blocks for the update. update_vert will |
319 | * handle spaning multiple pages. we break out each horizontal |
320 | * block in to individual blocks no taller than 64 pixels. |
321 | */ |
322 | static void arcfb_lcd_update_horiz(struct arcfb_par *par, unsigned int left, |
323 | unsigned int right, unsigned int top, unsigned int h) |
324 | { |
325 | unsigned int distance, upper, lower; |
326 | |
327 | distance = h; |
328 | upper = floor8(top); |
329 | lower = min(upper + distance - 1, ceil64(upper)); |
330 | |
331 | while (distance > 0) { |
332 | distance -= ((lower - upper) + 1 ); |
333 | arcfb_lcd_update_vert(par, top: upper, bottom: lower, left, right); |
334 | upper = lower + 1; |
335 | lower = min(upper + distance - 1, ceil64(upper)); |
336 | } |
337 | } |
338 | |
339 | /* |
340 | * here we start the process of splitting out the fb update into |
341 | * individual blocks of pixels. we end up splitting into 64x64 blocks |
342 | * and finally down to 64x8 pages. |
343 | */ |
344 | static void arcfb_lcd_update(struct arcfb_par *par, unsigned int dx, |
345 | unsigned int dy, unsigned int w, unsigned int h) |
346 | { |
347 | unsigned int left, right, distance, y; |
348 | |
349 | /* align the request first */ |
350 | y = floor8(dy); |
351 | h += dy - y; |
352 | h = iceil8(h); |
353 | |
354 | distance = w; |
355 | left = dx; |
356 | right = min(left + w - 1, ceil64(left)); |
357 | |
358 | while (distance > 0) { |
359 | arcfb_lcd_update_horiz(par, left, right, top: y, h); |
360 | distance -= ((right - left) + 1); |
361 | left = right + 1; |
362 | right = min(left + distance - 1, ceil64(left)); |
363 | } |
364 | } |
365 | |
366 | static int arcfb_ioctl(struct fb_info *info, |
367 | unsigned int cmd, unsigned long arg) |
368 | { |
369 | void __user *argp = (void __user *)arg; |
370 | struct arcfb_par *par = info->par; |
371 | unsigned long flags; |
372 | |
373 | switch (cmd) { |
374 | case FBIO_WAITEVENT: |
375 | { |
376 | DEFINE_WAIT(wait); |
377 | /* illegal to wait on arc if no irq will occur */ |
378 | if (!par->irq) |
379 | return -EINVAL; |
380 | |
381 | /* wait until the Arc has generated an interrupt |
382 | * which will wake us up */ |
383 | spin_lock_irqsave(&par->lock, flags); |
384 | prepare_to_wait(wq_head: &arcfb_waitq, wq_entry: &wait, |
385 | TASK_INTERRUPTIBLE); |
386 | spin_unlock_irqrestore(lock: &par->lock, flags); |
387 | schedule(); |
388 | finish_wait(wq_head: &arcfb_waitq, wq_entry: &wait); |
389 | } |
390 | fallthrough; |
391 | |
392 | case FBIO_GETCONTROL2: |
393 | { |
394 | unsigned char ctl2; |
395 | |
396 | ctl2 = ks108_readb_ctl2(par: info->par); |
397 | if (copy_to_user(to: argp, from: &ctl2, n: sizeof(ctl2))) |
398 | return -EFAULT; |
399 | return 0; |
400 | } |
401 | default: |
402 | return -EINVAL; |
403 | } |
404 | } |
405 | |
406 | static void arcfb_damage_range(struct fb_info *info, off_t off, size_t len) |
407 | { |
408 | struct arcfb_par *par = info->par; |
409 | unsigned int xres = info->var.xres; |
410 | unsigned int bitppos, startpos, endpos, bitcount; |
411 | unsigned int x, y, width, height; |
412 | |
413 | bitppos = off * 8; |
414 | startpos = floorXres(bitppos, xres); |
415 | endpos = ceilXres((bitppos + (len * 8)), xres); |
416 | bitcount = endpos - startpos; |
417 | |
418 | x = startpos % xres; |
419 | y = startpos / xres; |
420 | width = xres; |
421 | height = bitcount / xres; |
422 | |
423 | arcfb_lcd_update(par, dx: x, dy: y, w: width, h: height); |
424 | } |
425 | |
426 | static void arcfb_damage_area(struct fb_info *info, u32 x, u32 y, |
427 | u32 width, u32 height) |
428 | { |
429 | struct arcfb_par *par = info->par; |
430 | |
431 | /* update the physical lcd */ |
432 | arcfb_lcd_update(par, dx: x, dy: y, w: width, h: height); |
433 | } |
434 | |
435 | FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(arcfb, |
436 | arcfb_damage_range, |
437 | arcfb_damage_area) |
438 | |
439 | static const struct fb_ops arcfb_ops = { |
440 | .owner = THIS_MODULE, |
441 | .fb_open = arcfb_open, |
442 | __FB_DEFAULT_DEFERRED_OPS_RDWR(arcfb), |
443 | .fb_release = arcfb_release, |
444 | .fb_pan_display = arcfb_pan_display, |
445 | __FB_DEFAULT_DEFERRED_OPS_DRAW(arcfb), |
446 | .fb_ioctl = arcfb_ioctl, |
447 | // .fb_mmap reqires deferred I/O |
448 | }; |
449 | |
450 | static int arcfb_probe(struct platform_device *dev) |
451 | { |
452 | struct fb_info *info; |
453 | int retval = -ENOMEM; |
454 | int videomemorysize; |
455 | unsigned char *videomemory; |
456 | struct arcfb_par *par; |
457 | int i; |
458 | |
459 | videomemorysize = (((64*64)*num_cols)*num_rows)/8; |
460 | |
461 | /* We need a flat backing store for the Arc's |
462 | less-flat actual paged framebuffer */ |
463 | videomemory = vzalloc(size: videomemorysize); |
464 | if (!videomemory) |
465 | return retval; |
466 | |
467 | info = framebuffer_alloc(size: sizeof(struct arcfb_par), dev: &dev->dev); |
468 | if (!info) |
469 | goto err_fb_alloc; |
470 | |
471 | info->flags |= FBINFO_VIRTFB; |
472 | info->screen_buffer = videomemory; |
473 | info->fbops = &arcfb_ops; |
474 | |
475 | info->var = arcfb_var; |
476 | info->fix = arcfb_fix; |
477 | par = info->par; |
478 | par->info = info; |
479 | |
480 | if (!dio_addr || !cio_addr || !c2io_addr) { |
481 | printk(KERN_WARNING "no IO addresses supplied\n" ); |
482 | goto err_addr; |
483 | } |
484 | par->dio_addr = dio_addr; |
485 | par->cio_addr = cio_addr; |
486 | par->c2io_addr = c2io_addr; |
487 | par->cslut[0] = 0x00; |
488 | par->cslut[1] = 0x06; |
489 | spin_lock_init(&par->lock); |
490 | if (irq) { |
491 | par->irq = irq; |
492 | if (request_irq(irq: par->irq, handler: &arcfb_interrupt, IRQF_SHARED, |
493 | name: "arcfb" , dev: info)) { |
494 | printk(KERN_INFO |
495 | "arcfb: Failed req IRQ %d\n" , par->irq); |
496 | retval = -EBUSY; |
497 | goto err_addr; |
498 | } |
499 | } |
500 | retval = register_framebuffer(fb_info: info); |
501 | if (retval < 0) |
502 | goto err_register_fb; |
503 | platform_set_drvdata(pdev: dev, data: info); |
504 | fb_info(info, "Arc frame buffer device, using %dK of video memory\n" , |
505 | videomemorysize >> 10); |
506 | |
507 | /* this inits the lcd but doesn't clear dirty pixels */ |
508 | for (i = 0; i < num_cols * num_rows; i++) { |
509 | ks108_writeb_ctl(par, chipindex: i, KS_DPY_OFF); |
510 | ks108_set_start_line(par, chipindex: i, y: 0); |
511 | ks108_set_yaddr(par, chipindex: i, y: 0); |
512 | ks108_set_xaddr(par, chipindex: i, x: 0); |
513 | ks108_writeb_ctl(par, chipindex: i, KS_DPY_ON); |
514 | } |
515 | |
516 | /* if we were told to splash the screen, we just clear it */ |
517 | if (!nosplash) { |
518 | for (i = 0; i < num_cols * num_rows; i++) { |
519 | fb_info(info, "splashing lcd %d\n" , i); |
520 | ks108_set_start_line(par, chipindex: i, y: 0); |
521 | ks108_clear_lcd(par, chipindex: i); |
522 | } |
523 | } |
524 | |
525 | return 0; |
526 | |
527 | err_register_fb: |
528 | free_irq(par->irq, info); |
529 | err_addr: |
530 | framebuffer_release(info); |
531 | err_fb_alloc: |
532 | vfree(addr: videomemory); |
533 | return retval; |
534 | } |
535 | |
536 | static void arcfb_remove(struct platform_device *dev) |
537 | { |
538 | struct fb_info *info = platform_get_drvdata(pdev: dev); |
539 | |
540 | if (info) { |
541 | unregister_framebuffer(fb_info: info); |
542 | if (irq) |
543 | free_irq(((struct arcfb_par *)(info->par))->irq, info); |
544 | vfree(addr: info->screen_buffer); |
545 | framebuffer_release(info); |
546 | } |
547 | } |
548 | |
549 | static struct platform_driver arcfb_driver = { |
550 | .probe = arcfb_probe, |
551 | .remove_new = arcfb_remove, |
552 | .driver = { |
553 | .name = "arcfb" , |
554 | }, |
555 | }; |
556 | |
557 | static struct platform_device *arcfb_device; |
558 | |
559 | static int __init arcfb_init(void) |
560 | { |
561 | int ret; |
562 | |
563 | if (!arcfb_enable) |
564 | return -ENXIO; |
565 | |
566 | ret = platform_driver_register(&arcfb_driver); |
567 | if (!ret) { |
568 | arcfb_device = platform_device_alloc(name: "arcfb" , id: 0); |
569 | if (arcfb_device) { |
570 | ret = platform_device_add(pdev: arcfb_device); |
571 | } else { |
572 | ret = -ENOMEM; |
573 | } |
574 | if (ret) { |
575 | platform_device_put(pdev: arcfb_device); |
576 | platform_driver_unregister(&arcfb_driver); |
577 | } |
578 | } |
579 | return ret; |
580 | |
581 | } |
582 | |
583 | static void __exit arcfb_exit(void) |
584 | { |
585 | platform_device_unregister(arcfb_device); |
586 | platform_driver_unregister(&arcfb_driver); |
587 | } |
588 | |
589 | module_param(num_cols, ulong, 0); |
590 | MODULE_PARM_DESC(num_cols, "Num horiz panels, eg: 2 = 128 bit wide" ); |
591 | module_param(num_rows, ulong, 0); |
592 | MODULE_PARM_DESC(num_rows, "Num vert panels, eg: 1 = 64 bit high" ); |
593 | module_param(nosplash, uint, 0); |
594 | MODULE_PARM_DESC(nosplash, "Disable doing the splash screen" ); |
595 | module_param(arcfb_enable, uint, 0); |
596 | MODULE_PARM_DESC(arcfb_enable, "Enable communication with Arc board" ); |
597 | module_param_hw(dio_addr, ulong, ioport, 0); |
598 | MODULE_PARM_DESC(dio_addr, "IO address for data, eg: 0x480" ); |
599 | module_param_hw(cio_addr, ulong, ioport, 0); |
600 | MODULE_PARM_DESC(cio_addr, "IO address for control, eg: 0x400" ); |
601 | module_param_hw(c2io_addr, ulong, ioport, 0); |
602 | MODULE_PARM_DESC(c2io_addr, "IO address for secondary control, eg: 0x408" ); |
603 | module_param(splashval, ulong, 0); |
604 | MODULE_PARM_DESC(splashval, "Splash pattern: 0xFF is black, 0x00 is green" ); |
605 | module_param(tuhold, ulong, 0); |
606 | MODULE_PARM_DESC(tuhold, "Time to hold between strobing data to Arc board" ); |
607 | module_param_hw(irq, uint, irq, 0); |
608 | MODULE_PARM_DESC(irq, "IRQ for the Arc board" ); |
609 | |
610 | module_init(arcfb_init); |
611 | module_exit(arcfb_exit); |
612 | |
613 | MODULE_DESCRIPTION("fbdev driver for Arc monochrome LCD board" ); |
614 | MODULE_AUTHOR("Jaya Kumar" ); |
615 | MODULE_LICENSE("GPL" ); |
616 | |
617 | |