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Commit | Line | Data |
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1154ea7d JK |
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 | * http://www.intworks.biz/arclcd | |
6 | * | |
7 | * This file is subject to the terms and conditions of the GNU General Public | |
8 | * License. See the file COPYING in the main directory of this archive for | |
9 | * more details. | |
10 | * | |
11 | * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven. | |
12 | * | |
13 | * This driver was written to be used with the Arc LCD board. Arc uses a | |
14 | * set of KS108 chips that control individual 64x64 LCD matrices. The board | |
15 | * can be paneled in a variety of setups such as 2x1=128x64, 4x4=256x256 and | |
16 | * so on. The interface between the board and the host is TTL based GPIO. The | |
17 | * GPIO requirements are 8 writable data lines and 4+n lines for control. On a | |
18 | * GPIO-less system, the board can be tested by connecting the respective sigs | |
19 | * up to a parallel port connector. The driver requires the IO addresses for | |
20 | * data and control GPIO at load time. It is unable to probe for the | |
21 | * existence of the LCD so it must be told at load time whether it should | |
22 | * be enabled or not. | |
23 | * | |
24 | * Todo: | |
25 | * - testing with 4x4 | |
26 | * - testing with interrupt hw | |
27 | * | |
28 | * General notes: | |
29 | * - User must set tuhold. It's in microseconds. According to the 108 spec, | |
30 | * the hold time is supposed to be at least 1 microsecond. | |
31 | * - User must set num_cols=x num_rows=y, eg: x=2 means 128 | |
32 | * - User must set arcfb_enable=1 to enable it | |
33 | * - User must set dio_addr=0xIOADDR cio_addr=0xIOADDR | |
34 | * | |
35 | */ | |
36 | ||
37 | #include <linux/module.h> | |
38 | #include <linux/kernel.h> | |
39 | #include <linux/errno.h> | |
40 | #include <linux/string.h> | |
41 | #include <linux/mm.h> | |
42 | #include <linux/tty.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/vmalloc.h> | |
45 | #include <linux/delay.h> | |
46 | #include <linux/interrupt.h> | |
47 | #include <linux/fb.h> | |
48 | #include <linux/init.h> | |
49 | #include <linux/arcfb.h> | |
d052d1be | 50 | #include <linux/platform_device.h> |
1154ea7d JK |
51 | |
52 | #include <asm/uaccess.h> | |
53 | ||
54 | #define floor8(a) (a&(~0x07)) | |
55 | #define floorXres(a,xres) (a&(~(xres - 1))) | |
56 | #define iceil8(a) (((int)((a+7)/8))*8) | |
57 | #define ceil64(a) (a|0x3F) | |
58 | #define ceilXres(a,xres) (a|(xres - 1)) | |
59 | ||
60 | /* ks108 chipset specific defines and code */ | |
61 | ||
62 | #define KS_SET_DPY_START_LINE 0xC0 | |
63 | #define KS_SET_PAGE_NUM 0xB8 | |
64 | #define KS_SET_X 0x40 | |
65 | #define KS_CEHI 0x01 | |
66 | #define KS_CELO 0x00 | |
67 | #define KS_SEL_CMD 0x08 | |
68 | #define KS_SEL_DATA 0x00 | |
69 | #define KS_DPY_ON 0x3F | |
70 | #define KS_DPY_OFF 0x3E | |
71 | #define KS_INTACK 0x40 | |
72 | #define KS_CLRINT 0x02 | |
73 | ||
74 | struct arcfb_par { | |
75 | unsigned long dio_addr; | |
76 | unsigned long cio_addr; | |
77 | unsigned long c2io_addr; | |
78 | atomic_t ref_count; | |
79 | unsigned char cslut[9]; | |
80 | struct fb_info *info; | |
81 | unsigned int irq; | |
82 | spinlock_t lock; | |
83 | }; | |
84 | ||
85 | static struct fb_fix_screeninfo arcfb_fix __initdata = { | |
86 | .id = "arcfb", | |
87 | .type = FB_TYPE_PACKED_PIXELS, | |
88 | .visual = FB_VISUAL_MONO01, | |
89 | .xpanstep = 0, | |
90 | .ypanstep = 1, | |
91 | .ywrapstep = 0, | |
92 | .accel = FB_ACCEL_NONE, | |
93 | }; | |
94 | ||
95 | static struct fb_var_screeninfo arcfb_var __initdata = { | |
96 | .xres = 128, | |
97 | .yres = 64, | |
98 | .xres_virtual = 128, | |
99 | .yres_virtual = 64, | |
100 | .bits_per_pixel = 1, | |
101 | .nonstd = 1, | |
102 | }; | |
103 | ||
104 | static unsigned long num_cols; | |
105 | static unsigned long num_rows; | |
106 | static unsigned long dio_addr; | |
107 | static unsigned long cio_addr; | |
108 | static unsigned long c2io_addr; | |
109 | static unsigned long splashval; | |
110 | static unsigned long tuhold; | |
111 | static unsigned int nosplash; | |
112 | static unsigned int arcfb_enable; | |
113 | static unsigned int irq; | |
114 | ||
115 | static DECLARE_WAIT_QUEUE_HEAD(arcfb_waitq); | |
116 | ||
117 | static void ks108_writeb_ctl(struct arcfb_par *par, | |
118 | unsigned int chipindex, unsigned char value) | |
119 | { | |
120 | unsigned char chipselval = par->cslut[chipindex]; | |
121 | ||
122 | outb(chipselval|KS_CEHI|KS_SEL_CMD, par->cio_addr); | |
123 | outb(value, par->dio_addr); | |
124 | udelay(tuhold); | |
125 | outb(chipselval|KS_CELO|KS_SEL_CMD, par->cio_addr); | |
126 | } | |
127 | ||
128 | static void ks108_writeb_mainctl(struct arcfb_par *par, unsigned char value) | |
129 | { | |
130 | ||
131 | outb(value, par->cio_addr); | |
132 | udelay(tuhold); | |
133 | } | |
134 | ||
135 | static unsigned char ks108_readb_ctl2(struct arcfb_par *par) | |
136 | { | |
137 | return inb(par->c2io_addr); | |
138 | } | |
139 | ||
140 | static void ks108_writeb_data(struct arcfb_par *par, | |
141 | unsigned int chipindex, unsigned char value) | |
142 | { | |
143 | unsigned char chipselval = par->cslut[chipindex]; | |
144 | ||
145 | outb(chipselval|KS_CEHI|KS_SEL_DATA, par->cio_addr); | |
146 | outb(value, par->dio_addr); | |
147 | udelay(tuhold); | |
148 | outb(chipselval|KS_CELO|KS_SEL_DATA, par->cio_addr); | |
149 | } | |
150 | ||
151 | static void ks108_set_start_line(struct arcfb_par *par, | |
152 | unsigned int chipindex, unsigned char y) | |
153 | { | |
154 | ks108_writeb_ctl(par, chipindex, KS_SET_DPY_START_LINE|y); | |
155 | } | |
156 | ||
157 | static void ks108_set_yaddr(struct arcfb_par *par, | |
158 | unsigned int chipindex, unsigned char y) | |
159 | { | |
160 | ks108_writeb_ctl(par, chipindex, KS_SET_PAGE_NUM|y); | |
161 | } | |
162 | ||
163 | static void ks108_set_xaddr(struct arcfb_par *par, | |
164 | unsigned int chipindex, unsigned char x) | |
165 | { | |
166 | ks108_writeb_ctl(par, chipindex, KS_SET_X|x); | |
167 | } | |
168 | ||
169 | static void ks108_clear_lcd(struct arcfb_par *par, unsigned int chipindex) | |
170 | { | |
171 | int i,j; | |
172 | ||
173 | for (i = 0; i <= 8; i++) { | |
174 | ks108_set_yaddr(par, chipindex, i); | |
175 | ks108_set_xaddr(par, chipindex, 0); | |
176 | for (j = 0; j < 64; j++) { | |
177 | ks108_writeb_data(par, chipindex, | |
178 | (unsigned char) splashval); | |
179 | } | |
180 | } | |
181 | } | |
182 | ||
183 | /* main arcfb functions */ | |
184 | ||
185 | static int arcfb_open(struct fb_info *info, int user) | |
186 | { | |
187 | struct arcfb_par *par = info->par; | |
188 | ||
189 | atomic_inc(&par->ref_count); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | static int arcfb_release(struct fb_info *info, int user) | |
194 | { | |
195 | struct arcfb_par *par = info->par; | |
196 | int count = atomic_read(&par->ref_count); | |
197 | ||
198 | if (!count) | |
199 | return -EINVAL; | |
200 | atomic_dec(&par->ref_count); | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static int arcfb_pan_display(struct fb_var_screeninfo *var, | |
205 | struct fb_info *info) | |
206 | { | |
207 | int i; | |
208 | struct arcfb_par *par = info->par; | |
209 | ||
210 | if ((var->vmode & FB_VMODE_YWRAP) && (var->yoffset < 64) | |
211 | && (info->var.yres <= 64)) { | |
212 | for (i = 0; i < num_cols; i++) { | |
213 | ks108_set_start_line(par, i, var->yoffset); | |
214 | } | |
215 | info->var.yoffset = var->yoffset; | |
216 | return 0; | |
217 | } | |
218 | ||
219 | return -EINVAL; | |
220 | } | |
221 | ||
222 | static irqreturn_t arcfb_interrupt(int vec, void *dev_instance, | |
223 | struct pt_regs *regs) | |
224 | { | |
225 | struct fb_info *info = dev_instance; | |
226 | unsigned char ctl2status; | |
227 | struct arcfb_par *par = info->par; | |
228 | ||
229 | ctl2status = ks108_readb_ctl2(par); | |
230 | ||
231 | if (!(ctl2status & KS_INTACK)) /* not arc generated interrupt */ | |
232 | return IRQ_NONE; | |
233 | ||
234 | ks108_writeb_mainctl(par, KS_CLRINT); | |
235 | ||
236 | spin_lock(&par->lock); | |
237 | if (waitqueue_active(&arcfb_waitq)) { | |
238 | wake_up(&arcfb_waitq); | |
239 | } | |
240 | spin_unlock(&par->lock); | |
241 | ||
242 | return IRQ_HANDLED; | |
243 | } | |
244 | ||
245 | /* | |
246 | * here we handle a specific page on the lcd. the complexity comes from | |
247 | * the fact that the fb is laidout in 8xX vertical columns. we extract | |
248 | * each write of 8 vertical pixels. then we shift out as we move along | |
249 | * X. That's what rightshift does. bitmask selects the desired input bit. | |
250 | */ | |
251 | static void arcfb_lcd_update_page(struct arcfb_par *par, unsigned int upper, | |
252 | unsigned int left, unsigned int right, unsigned int distance) | |
253 | { | |
254 | unsigned char *src; | |
255 | unsigned int xindex, yindex, chipindex, linesize; | |
256 | int i, count; | |
257 | unsigned char val; | |
258 | unsigned char bitmask, rightshift; | |
259 | ||
260 | xindex = left >> 6; | |
261 | yindex = upper >> 6; | |
262 | chipindex = (xindex + (yindex*num_cols)); | |
263 | ||
264 | ks108_set_yaddr(par, chipindex, upper/8); | |
265 | ||
266 | linesize = par->info->var.xres/8; | |
267 | src = par->info->screen_base + (left/8) + (upper * linesize); | |
268 | ks108_set_xaddr(par, chipindex, left); | |
269 | ||
270 | bitmask=1; | |
271 | rightshift=0; | |
272 | while (left <= right) { | |
273 | val = 0; | |
274 | for (i = 0; i < 8; i++) { | |
275 | if ( i > rightshift) { | |
276 | val |= (*(src + (i*linesize)) & bitmask) | |
277 | << (i - rightshift); | |
278 | } else { | |
279 | val |= (*(src + (i*linesize)) & bitmask) | |
280 | >> (rightshift - i); | |
281 | } | |
282 | } | |
283 | ks108_writeb_data(par, chipindex, val); | |
284 | left++; | |
285 | count++; | |
286 | if (bitmask == 0x80) { | |
287 | bitmask = 1; | |
288 | src++; | |
289 | rightshift=0; | |
290 | } else { | |
291 | bitmask <<= 1; | |
292 | rightshift++; | |
293 | } | |
294 | } | |
295 | } | |
296 | ||
297 | /* | |
298 | * here we handle the entire vertical page of the update. we write across | |
299 | * lcd chips. update_page uses the upper/left values to decide which | |
300 | * chip to select for the right. upper is needed for setting the page | |
301 | * desired for the write. | |
302 | */ | |
303 | static void arcfb_lcd_update_vert(struct arcfb_par *par, unsigned int top, | |
304 | unsigned int bottom, unsigned int left, unsigned int right) | |
305 | { | |
306 | unsigned int distance, upper, lower; | |
307 | ||
308 | distance = (bottom - top) + 1; | |
309 | upper = top; | |
310 | lower = top + 7; | |
311 | ||
312 | while (distance > 0) { | |
313 | distance -= 8; | |
314 | arcfb_lcd_update_page(par, upper, left, right, 8); | |
315 | upper = lower + 1; | |
316 | lower = upper + 7; | |
317 | } | |
318 | } | |
319 | ||
320 | /* | |
321 | * here we handle horizontal blocks for the update. update_vert will | |
322 | * handle spaning multiple pages. we break out each horizontal | |
323 | * block in to individual blocks no taller than 64 pixels. | |
324 | */ | |
325 | static void arcfb_lcd_update_horiz(struct arcfb_par *par, unsigned int left, | |
326 | unsigned int right, unsigned int top, unsigned int h) | |
327 | { | |
328 | unsigned int distance, upper, lower; | |
329 | ||
330 | distance = h; | |
331 | upper = floor8(top); | |
332 | lower = min(upper + distance - 1, ceil64(upper)); | |
333 | ||
334 | while (distance > 0) { | |
335 | distance -= ((lower - upper) + 1 ); | |
336 | arcfb_lcd_update_vert(par, upper, lower, left, right); | |
337 | upper = lower + 1; | |
338 | lower = min(upper + distance - 1, ceil64(upper)); | |
339 | } | |
340 | } | |
341 | ||
342 | /* | |
343 | * here we start the process of spliting out the fb update into | |
344 | * individual blocks of pixels. we end up spliting into 64x64 blocks | |
345 | * and finally down to 64x8 pages. | |
346 | */ | |
347 | static void arcfb_lcd_update(struct arcfb_par *par, unsigned int dx, | |
348 | unsigned int dy, unsigned int w, unsigned int h) | |
349 | { | |
350 | unsigned int left, right, distance, y; | |
351 | ||
352 | /* align the request first */ | |
353 | y = floor8(dy); | |
354 | h += dy - y; | |
355 | h = iceil8(h); | |
356 | ||
357 | distance = w; | |
358 | left = dx; | |
359 | right = min(left + w - 1, ceil64(left)); | |
360 | ||
361 | while (distance > 0) { | |
362 | arcfb_lcd_update_horiz(par, left, right, y, h); | |
363 | distance -= ((right - left) + 1); | |
364 | left = right + 1; | |
365 | right = min(left + distance - 1, ceil64(left)); | |
366 | } | |
367 | } | |
368 | ||
369 | void arcfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) | |
370 | { | |
371 | struct arcfb_par *par = info->par; | |
372 | ||
373 | cfb_fillrect(info, rect); | |
374 | ||
375 | /* update the physical lcd */ | |
376 | arcfb_lcd_update(par, rect->dx, rect->dy, rect->width, rect->height); | |
377 | } | |
378 | ||
379 | void arcfb_copyarea(struct fb_info *info, const struct fb_copyarea *area) | |
380 | { | |
381 | struct arcfb_par *par = info->par; | |
382 | ||
383 | cfb_copyarea(info, area); | |
384 | ||
385 | /* update the physical lcd */ | |
386 | arcfb_lcd_update(par, area->dx, area->dy, area->width, area->height); | |
387 | } | |
388 | ||
389 | void arcfb_imageblit(struct fb_info *info, const struct fb_image *image) | |
390 | { | |
391 | struct arcfb_par *par = info->par; | |
392 | ||
393 | cfb_imageblit(info, image); | |
394 | ||
395 | /* update the physical lcd */ | |
396 | arcfb_lcd_update(par, image->dx, image->dy, image->width, | |
397 | image->height); | |
398 | } | |
399 | ||
400 | static int arcfb_ioctl(struct inode *inode, struct file *file, | |
401 | unsigned int cmd, unsigned long arg, | |
402 | struct fb_info *info) | |
403 | { | |
404 | void __user *argp = (void __user *)arg; | |
405 | struct arcfb_par *par = info->par; | |
406 | unsigned long flags; | |
407 | ||
408 | switch (cmd) { | |
409 | case FBIO_WAITEVENT: | |
410 | { | |
411 | DEFINE_WAIT(wait); | |
412 | /* illegal to wait on arc if no irq will occur */ | |
413 | if (!par->irq) | |
414 | return -EINVAL; | |
415 | ||
416 | /* wait until the Arc has generated an interrupt | |
417 | * which will wake us up */ | |
418 | spin_lock_irqsave(&par->lock, flags); | |
419 | prepare_to_wait(&arcfb_waitq, &wait, | |
420 | TASK_INTERRUPTIBLE); | |
421 | spin_unlock_irqrestore(&par->lock, flags); | |
422 | schedule(); | |
423 | finish_wait(&arcfb_waitq, &wait); | |
424 | } | |
425 | case FBIO_GETCONTROL2: | |
426 | { | |
427 | unsigned char ctl2; | |
428 | ||
429 | ctl2 = ks108_readb_ctl2(info->par); | |
430 | if (copy_to_user(argp, &ctl2, sizeof(ctl2))) | |
431 | return -EFAULT; | |
432 | return 0; | |
433 | } | |
434 | default: | |
435 | return -EINVAL; | |
436 | } | |
437 | } | |
438 | ||
439 | /* | |
440 | * this is the access path from userspace. they can seek and write to | |
441 | * the fb. it's inefficient for them to do anything less than 64*8 | |
442 | * writes since we update the lcd in each write() anyway. | |
443 | */ | |
444 | static ssize_t arcfb_write(struct file *file, const char *buf, size_t count, | |
445 | loff_t *ppos) | |
446 | { | |
447 | /* modded from epson 1355 */ | |
448 | ||
449 | struct inode *inode; | |
450 | int fbidx; | |
451 | struct fb_info *info; | |
452 | unsigned long p; | |
453 | int err=-EINVAL; | |
454 | unsigned int fbmemlength,x,y,w,h, bitppos, startpos, endpos, bitcount; | |
455 | struct arcfb_par *par; | |
456 | unsigned int xres; | |
457 | ||
458 | p = *ppos; | |
459 | inode = file->f_dentry->d_inode; | |
460 | fbidx = iminor(inode); | |
461 | info = registered_fb[fbidx]; | |
462 | par = info->par; | |
463 | ||
464 | if (!info || !info->screen_base) | |
465 | return -ENODEV; | |
466 | ||
467 | xres = info->var.xres; | |
468 | fbmemlength = (xres * info->var.yres)/8; | |
469 | ||
470 | if (p > fbmemlength) | |
471 | return -ENOSPC; | |
472 | ||
473 | err = 0; | |
474 | if ((count + p) > fbmemlength) { | |
475 | count = fbmemlength - p; | |
476 | err = -ENOSPC; | |
477 | } | |
478 | ||
479 | if (count) { | |
480 | char *base_addr; | |
481 | ||
482 | base_addr = info->screen_base; | |
483 | count -= copy_from_user(base_addr + p, buf, count); | |
484 | *ppos += count; | |
485 | err = -EFAULT; | |
486 | } | |
487 | ||
488 | ||
489 | bitppos = p*8; | |
490 | startpos = floorXres(bitppos, xres); | |
491 | endpos = ceilXres((bitppos + (count*8)), xres); | |
492 | bitcount = endpos - startpos; | |
493 | ||
494 | x = startpos % xres; | |
495 | y = startpos / xres; | |
496 | w = xres; | |
497 | h = bitcount / xres; | |
498 | arcfb_lcd_update(par, x, y, w, h); | |
499 | ||
500 | if (count) | |
501 | return count; | |
502 | return err; | |
503 | } | |
504 | ||
505 | static void arcfb_platform_release(struct device *device) | |
506 | { | |
507 | } | |
508 | ||
509 | static struct fb_ops arcfb_ops = { | |
510 | .owner = THIS_MODULE, | |
511 | .fb_open = arcfb_open, | |
512 | .fb_write = arcfb_write, | |
513 | .fb_release = arcfb_release, | |
514 | .fb_pan_display = arcfb_pan_display, | |
515 | .fb_fillrect = arcfb_fillrect, | |
516 | .fb_copyarea = arcfb_copyarea, | |
517 | .fb_imageblit = arcfb_imageblit, | |
518 | .fb_cursor = soft_cursor, | |
519 | .fb_ioctl = arcfb_ioctl, | |
520 | }; | |
521 | ||
522 | static int __init arcfb_probe(struct device *device) | |
523 | { | |
524 | struct platform_device *dev = to_platform_device(device); | |
525 | struct fb_info *info; | |
526 | int retval = -ENOMEM; | |
527 | int videomemorysize; | |
528 | unsigned char *videomemory; | |
529 | struct arcfb_par *par; | |
530 | int i; | |
531 | ||
532 | videomemorysize = (((64*64)*num_cols)*num_rows)/8; | |
533 | ||
534 | /* We need a flat backing store for the Arc's | |
535 | less-flat actual paged framebuffer */ | |
536 | if (!(videomemory = vmalloc(videomemorysize))) | |
537 | return retval; | |
538 | ||
539 | memset(videomemory, 0, videomemorysize); | |
540 | ||
541 | info = framebuffer_alloc(sizeof(struct arcfb_par), &dev->dev); | |
542 | if (!info) | |
543 | goto err; | |
544 | ||
545 | info->screen_base = (char __iomem *)videomemory; | |
546 | info->fbops = &arcfb_ops; | |
547 | ||
548 | info->var = arcfb_var; | |
549 | info->fix = arcfb_fix; | |
550 | par = info->par; | |
551 | par->info = info; | |
552 | ||
553 | if (!dio_addr || !cio_addr || !c2io_addr) { | |
554 | printk(KERN_WARNING "no IO addresses supplied\n"); | |
555 | goto err1; | |
556 | } | |
557 | par->dio_addr = dio_addr; | |
558 | par->cio_addr = cio_addr; | |
559 | par->c2io_addr = c2io_addr; | |
560 | par->cslut[0] = 0x00; | |
561 | par->cslut[1] = 0x06; | |
562 | info->flags = FBINFO_FLAG_DEFAULT; | |
563 | spin_lock_init(&par->lock); | |
564 | retval = register_framebuffer(info); | |
565 | if (retval < 0) | |
566 | goto err1; | |
567 | dev_set_drvdata(&dev->dev, info); | |
568 | if (irq) { | |
569 | par->irq = irq; | |
570 | if (request_irq(par->irq, &arcfb_interrupt, SA_SHIRQ, | |
571 | "arcfb", info)) { | |
572 | printk(KERN_INFO | |
573 | "arcfb: Failed req IRQ %d\n", par->irq); | |
574 | goto err1; | |
575 | } | |
576 | } | |
577 | printk(KERN_INFO | |
578 | "fb%d: Arc frame buffer device, using %dK of video memory\n", | |
579 | info->node, videomemorysize >> 10); | |
580 | ||
581 | /* this inits the lcd but doesn't clear dirty pixels */ | |
582 | for (i = 0; i < num_cols * num_rows; i++) { | |
583 | ks108_writeb_ctl(par, i, KS_DPY_OFF); | |
584 | ks108_set_start_line(par, i, 0); | |
585 | ks108_set_yaddr(par, i, 0); | |
586 | ks108_set_xaddr(par, i, 0); | |
587 | ks108_writeb_ctl(par, i, KS_DPY_ON); | |
588 | } | |
589 | ||
590 | /* if we were told to splash the screen, we just clear it */ | |
591 | if (!nosplash) { | |
592 | for (i = 0; i < num_cols * num_rows; i++) { | |
593 | printk(KERN_INFO "fb%d: splashing lcd %d\n", | |
594 | info->node, i); | |
595 | ks108_set_start_line(par, i, 0); | |
596 | ks108_clear_lcd(par, i); | |
597 | } | |
598 | } | |
599 | ||
600 | return 0; | |
601 | err1: | |
602 | framebuffer_release(info); | |
603 | err: | |
604 | vfree(videomemory); | |
605 | return retval; | |
606 | } | |
607 | ||
608 | static int arcfb_remove(struct device *device) | |
609 | { | |
610 | struct fb_info *info = dev_get_drvdata(device); | |
611 | ||
612 | if (info) { | |
613 | unregister_framebuffer(info); | |
614 | vfree(info->screen_base); | |
615 | framebuffer_release(info); | |
616 | } | |
617 | return 0; | |
618 | } | |
619 | ||
620 | static struct device_driver arcfb_driver = { | |
621 | .name = "arcfb", | |
622 | .bus = &platform_bus_type, | |
623 | .probe = arcfb_probe, | |
624 | .remove = arcfb_remove, | |
625 | }; | |
626 | ||
627 | static struct platform_device arcfb_device = { | |
628 | .name = "arcfb", | |
629 | .id = 0, | |
630 | .dev = { | |
631 | .release = arcfb_platform_release, | |
632 | } | |
633 | }; | |
634 | ||
635 | static int __init arcfb_init(void) | |
636 | { | |
637 | int ret; | |
638 | ||
639 | if (!arcfb_enable) | |
640 | return -ENXIO; | |
641 | ||
642 | ret = driver_register(&arcfb_driver); | |
643 | if (!ret) { | |
644 | ret = platform_device_register(&arcfb_device); | |
645 | if (ret) | |
646 | driver_unregister(&arcfb_driver); | |
647 | } | |
648 | return ret; | |
649 | ||
650 | } | |
651 | ||
652 | static void __exit arcfb_exit(void) | |
653 | { | |
654 | platform_device_unregister(&arcfb_device); | |
655 | driver_unregister(&arcfb_driver); | |
656 | } | |
657 | ||
658 | module_param(num_cols, ulong, 0); | |
659 | MODULE_PARM_DESC(num_cols, "Num horiz panels, eg: 2 = 128 bit wide"); | |
660 | module_param(num_rows, ulong, 0); | |
661 | MODULE_PARM_DESC(num_rows, "Num vert panels, eg: 1 = 64 bit high"); | |
662 | module_param(nosplash, uint, 0); | |
663 | MODULE_PARM_DESC(nosplash, "Disable doing the splash screen"); | |
664 | module_param(arcfb_enable, uint, 0); | |
665 | MODULE_PARM_DESC(arcfb_enable, "Enable communication with Arc board"); | |
666 | module_param(dio_addr, ulong, 0); | |
667 | MODULE_PARM_DESC(dio_addr, "IO address for data, eg: 0x480"); | |
668 | module_param(cio_addr, ulong, 0); | |
669 | MODULE_PARM_DESC(cio_addr, "IO address for control, eg: 0x400"); | |
670 | module_param(c2io_addr, ulong, 0); | |
671 | MODULE_PARM_DESC(c2io_addr, "IO address for secondary control, eg: 0x408"); | |
672 | module_param(splashval, ulong, 0); | |
673 | MODULE_PARM_DESC(splashval, "Splash pattern: 0xFF is black, 0x00 is green"); | |
674 | module_param(tuhold, ulong, 0); | |
675 | MODULE_PARM_DESC(tuhold, "Time to hold between strobing data to Arc board"); | |
676 | module_param(irq, uint, 0); | |
677 | MODULE_PARM_DESC(irq, "IRQ for the Arc board"); | |
678 | ||
679 | module_init(arcfb_init); | |
680 | module_exit(arcfb_exit); | |
681 | ||
682 | MODULE_DESCRIPTION("fbdev driver for Arc monochrome LCD board"); | |
683 | MODULE_AUTHOR("Jaya Kumar"); | |
684 | MODULE_LICENSE("GPL"); | |
685 |