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1 | /* |
2 | * linux/drivers/video/hgafb.c -- Hercules graphics adaptor frame buffer device |
3 | * |
4 | * Created 25 Nov 1999 by Ferenc Bakonyi (fero@drama.obuda.kando.hu) |
5 | * Based on skeletonfb.c by Geert Uytterhoeven and |
6 | * mdacon.c by Andrew Apted |
7 | * |
8 | * History: |
9 | * |
10 | * - Revision 0.1.8 (23 Oct 2002): Ported to new framebuffer api. |
11 | * |
12 | * - Revision 0.1.7 (23 Jan 2001): fix crash resulting from MDA only cards |
13 | * being detected as Hercules. (Paul G.) |
14 | * - Revision 0.1.6 (17 Aug 2000): new style structs |
15 | * documentation |
16 | * - Revision 0.1.5 (13 Mar 2000): spinlocks instead of saveflags();cli();etc |
17 | * minor fixes |
18 | * - Revision 0.1.4 (24 Jan 2000): fixed a bug in hga_card_detect() for |
19 | * HGA-only systems |
20 | * - Revision 0.1.3 (22 Jan 2000): modified for the new fb_info structure |
21 | * screen is cleared after rmmod |
22 | * virtual resolutions |
23 | * module parameter 'nologo={0|1}' |
24 | * the most important: boot logo :) |
25 | * - Revision 0.1.0 (6 Dec 1999): faster scrolling and minor fixes |
26 | * - First release (25 Nov 1999) |
27 | * |
28 | * This file is subject to the terms and conditions of the GNU General Public |
29 | * License. See the file COPYING in the main directory of this archive |
30 | * for more details. |
31 | */ |
32 | |
33 | #include <linux/module.h> |
34 | #include <linux/kernel.h> |
35 | #include <linux/errno.h> |
36 | #include <linux/spinlock.h> |
37 | #include <linux/string.h> |
38 | #include <linux/mm.h> |
39 | #include <linux/delay.h> |
40 | #include <linux/fb.h> |
41 | #include <linux/init.h> |
42 | #include <linux/ioport.h> |
43 | #include <linux/platform_device.h> |
44 | #include <asm/io.h> |
45 | #include <asm/vga.h> |
46 | |
47 | #if 0 |
48 | #define DPRINTK(args...) printk(KERN_DEBUG __FILE__": " ##args) |
49 | #else |
50 | #define DPRINTK(args...) |
51 | #endif |
52 | |
53 | #if 0 |
54 | #define CHKINFO(ret) if (info != &fb_info) { printk(KERN_DEBUG __FILE__": This should never happen, line:%d \n", __LINE__); return ret; } |
55 | #else |
56 | #define CHKINFO(ret) |
57 | #endif |
58 | |
59 | /* Description of the hardware layout */ |
60 | |
61 | static void __iomem *hga_vram; /* Base of video memory */ |
62 | static unsigned long hga_vram_len; /* Size of video memory */ |
63 | |
64 | #define HGA_ROWADDR(row) ((row%4)*8192 + (row>>2)*90) |
65 | #define HGA_TXT 0 |
66 | #define HGA_GFX 1 |
67 | |
68 | static inline u8 __iomem * rowaddr(struct fb_info *info, u_int row) |
69 | { |
70 | return info->screen_base + HGA_ROWADDR(row); |
71 | } |
72 | |
73 | static int hga_mode = -1; /* 0 = txt, 1 = gfx mode */ |
74 | |
75 | static enum { TYPE_HERC, TYPE_HERCPLUS, TYPE_HERCCOLOR } hga_type; |
76 | static char *hga_type_name; |
77 | |
78 | #define HGA_INDEX_PORT 0x3b4 /* Register select port */ |
79 | #define HGA_VALUE_PORT 0x3b5 /* Register value port */ |
80 | #define HGA_MODE_PORT 0x3b8 /* Mode control port */ |
81 | #define HGA_STATUS_PORT 0x3ba /* Status and Config port */ |
82 | #define HGA_GFX_PORT 0x3bf /* Graphics control port */ |
83 | |
84 | /* HGA register values */ |
85 | |
86 | #define HGA_CURSOR_BLINKING 0x00 |
87 | #define HGA_CURSOR_OFF 0x20 |
88 | #define HGA_CURSOR_SLOWBLINK 0x60 |
89 | |
90 | #define HGA_MODE_GRAPHICS 0x02 |
91 | #define HGA_MODE_VIDEO_EN 0x08 |
92 | #define HGA_MODE_BLINK_EN 0x20 |
93 | #define HGA_MODE_GFX_PAGE1 0x80 |
94 | |
95 | #define HGA_STATUS_HSYNC 0x01 |
96 | #define HGA_STATUS_VSYNC 0x80 |
97 | #define HGA_STATUS_VIDEO 0x08 |
98 | |
99 | #define HGA_CONFIG_COL132 0x08 |
100 | #define HGA_GFX_MODE_EN 0x01 |
101 | #define HGA_GFX_PAGE_EN 0x02 |
102 | |
103 | /* Global locks */ |
104 | |
105 | static DEFINE_SPINLOCK(hga_reg_lock); |
106 | |
107 | /* Framebuffer driver structures */ |
108 | |
109 | static struct fb_var_screeninfo __initdata hga_default_var = { |
110 | .xres = 720, |
111 | .yres = 348, |
112 | .xres_virtual = 720, |
113 | .yres_virtual = 348, |
114 | .bits_per_pixel = 1, |
115 | .red = {0, 1, 0}, |
116 | .green = {0, 1, 0}, |
117 | .blue = {0, 1, 0}, |
118 | .transp = {0, 0, 0}, |
119 | .height = -1, |
120 | .width = -1, |
121 | }; |
122 | |
123 | static struct fb_fix_screeninfo __initdata hga_fix = { |
124 | .id = "HGA", |
125 | .type = FB_TYPE_PACKED_PIXELS, /* (not sure) */ |
126 | .visual = FB_VISUAL_MONO10, |
127 | .xpanstep = 8, |
128 | .ypanstep = 8, |
129 | .line_length = 90, |
130 | .accel = FB_ACCEL_NONE |
131 | }; |
132 | |
133 | /* Don't assume that tty1 will be the initial current console. */ |
134 | static int release_io_port = 0; |
135 | static int release_io_ports = 0; |
136 | static int nologo = 0; |
137 | |
138 | /* ------------------------------------------------------------------------- |
139 | * |
140 | * Low level hardware functions |
141 | * |
142 | * ------------------------------------------------------------------------- */ |
143 | |
144 | static void write_hga_b(unsigned int val, unsigned char reg) |
145 | { |
146 | outb_p(reg, HGA_INDEX_PORT); |
147 | outb_p(val, HGA_VALUE_PORT); |
148 | } |
149 | |
150 | static void write_hga_w(unsigned int val, unsigned char reg) |
151 | { |
152 | outb_p(reg, HGA_INDEX_PORT); outb_p(val >> 8, HGA_VALUE_PORT); |
153 | outb_p(reg+1, HGA_INDEX_PORT); outb_p(val & 0xff, HGA_VALUE_PORT); |
154 | } |
155 | |
156 | static int test_hga_b(unsigned char val, unsigned char reg) |
157 | { |
158 | outb_p(reg, HGA_INDEX_PORT); |
159 | outb (val, HGA_VALUE_PORT); |
160 | udelay(20); val = (inb_p(HGA_VALUE_PORT) == val); |
161 | return val; |
162 | } |
163 | |
164 | static void hga_clear_screen(void) |
165 | { |
166 | unsigned char fillchar = 0xbf; /* magic */ |
167 | unsigned long flags; |
168 | |
169 | spin_lock_irqsave(&hga_reg_lock, flags); |
170 | if (hga_mode == HGA_TXT) |
171 | fillchar = ' '; |
172 | else if (hga_mode == HGA_GFX) |
173 | fillchar = 0x00; |
174 | spin_unlock_irqrestore(&hga_reg_lock, flags); |
175 | if (fillchar != 0xbf) |
176 | memset_io(hga_vram, fillchar, hga_vram_len); |
177 | } |
178 | |
179 | static void hga_txt_mode(void) |
180 | { |
181 | unsigned long flags; |
182 | |
183 | spin_lock_irqsave(&hga_reg_lock, flags); |
184 | outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_BLINK_EN, HGA_MODE_PORT); |
185 | outb_p(0x00, HGA_GFX_PORT); |
186 | outb_p(0x00, HGA_STATUS_PORT); |
187 | |
188 | write_hga_b(0x61, 0x00); /* horizontal total */ |
189 | write_hga_b(0x50, 0x01); /* horizontal displayed */ |
190 | write_hga_b(0x52, 0x02); /* horizontal sync pos */ |
191 | write_hga_b(0x0f, 0x03); /* horizontal sync width */ |
192 | |
193 | write_hga_b(0x19, 0x04); /* vertical total */ |
194 | write_hga_b(0x06, 0x05); /* vertical total adjust */ |
195 | write_hga_b(0x19, 0x06); /* vertical displayed */ |
196 | write_hga_b(0x19, 0x07); /* vertical sync pos */ |
197 | |
198 | write_hga_b(0x02, 0x08); /* interlace mode */ |
199 | write_hga_b(0x0d, 0x09); /* maximum scanline */ |
200 | write_hga_b(0x0c, 0x0a); /* cursor start */ |
201 | write_hga_b(0x0d, 0x0b); /* cursor end */ |
202 | |
203 | write_hga_w(0x0000, 0x0c); /* start address */ |
204 | write_hga_w(0x0000, 0x0e); /* cursor location */ |
205 | |
206 | hga_mode = HGA_TXT; |
207 | spin_unlock_irqrestore(&hga_reg_lock, flags); |
208 | } |
209 | |
210 | static void hga_gfx_mode(void) |
211 | { |
212 | unsigned long flags; |
213 | |
214 | spin_lock_irqsave(&hga_reg_lock, flags); |
215 | outb_p(0x00, HGA_STATUS_PORT); |
216 | outb_p(HGA_GFX_MODE_EN, HGA_GFX_PORT); |
217 | outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT); |
218 | |
219 | write_hga_b(0x35, 0x00); /* horizontal total */ |
220 | write_hga_b(0x2d, 0x01); /* horizontal displayed */ |
221 | write_hga_b(0x2e, 0x02); /* horizontal sync pos */ |
222 | write_hga_b(0x07, 0x03); /* horizontal sync width */ |
223 | |
224 | write_hga_b(0x5b, 0x04); /* vertical total */ |
225 | write_hga_b(0x02, 0x05); /* vertical total adjust */ |
226 | write_hga_b(0x57, 0x06); /* vertical displayed */ |
227 | write_hga_b(0x57, 0x07); /* vertical sync pos */ |
228 | |
229 | write_hga_b(0x02, 0x08); /* interlace mode */ |
230 | write_hga_b(0x03, 0x09); /* maximum scanline */ |
231 | write_hga_b(0x00, 0x0a); /* cursor start */ |
232 | write_hga_b(0x00, 0x0b); /* cursor end */ |
233 | |
234 | write_hga_w(0x0000, 0x0c); /* start address */ |
235 | write_hga_w(0x0000, 0x0e); /* cursor location */ |
236 | |
237 | hga_mode = HGA_GFX; |
238 | spin_unlock_irqrestore(&hga_reg_lock, flags); |
239 | } |
240 | |
241 | static void hga_show_logo(struct fb_info *info) |
242 | { |
243 | /* |
244 | void __iomem *dest = hga_vram; |
245 | char *logo = linux_logo_bw; |
246 | int x, y; |
247 | |
248 | for (y = 134; y < 134 + 80 ; y++) * this needs some cleanup * |
249 | for (x = 0; x < 10 ; x++) |
250 | writeb(~*(logo++),(dest + HGA_ROWADDR(y) + x + 40)); |
251 | */ |
252 | } |
253 | |
254 | static void hga_pan(unsigned int xoffset, unsigned int yoffset) |
255 | { |
256 | unsigned int base; |
257 | unsigned long flags; |
258 | |
259 | base = (yoffset / 8) * 90 + xoffset; |
260 | spin_lock_irqsave(&hga_reg_lock, flags); |
261 | write_hga_w(base, 0x0c); /* start address */ |
262 | spin_unlock_irqrestore(&hga_reg_lock, flags); |
263 | DPRINTK("hga_pan: base:%d\n", base); |
264 | } |
265 | |
266 | static void hga_blank(int blank_mode) |
267 | { |
268 | unsigned long flags; |
269 | |
270 | spin_lock_irqsave(&hga_reg_lock, flags); |
271 | if (blank_mode) { |
272 | outb_p(0x00, HGA_MODE_PORT); /* disable video */ |
273 | } else { |
274 | outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT); |
275 | } |
276 | spin_unlock_irqrestore(&hga_reg_lock, flags); |
277 | } |
278 | |
279 | static int __init hga_card_detect(void) |
280 | { |
281 | int count = 0; |
282 | void __iomem *p, *q; |
283 | unsigned short p_save, q_save; |
284 | |
285 | hga_vram_len = 0x08000; |
286 | |
287 | hga_vram = ioremap(0xb0000, hga_vram_len); |
288 | |
289 | if (request_region(0x3b0, 12, "hgafb")) |
290 | release_io_ports = 1; |
291 | if (request_region(0x3bf, 1, "hgafb")) |
292 | release_io_port = 1; |
293 | |
294 | /* do a memory check */ |
295 | |
296 | p = hga_vram; |
297 | q = hga_vram + 0x01000; |
298 | |
299 | p_save = readw(p); q_save = readw(q); |
300 | |
301 | writew(0xaa55, p); if (readw(p) == 0xaa55) count++; |
302 | writew(0x55aa, p); if (readw(p) == 0x55aa) count++; |
303 | writew(p_save, p); |
304 | |
305 | if (count != 2) |
306 | goto error; |
307 | |
308 | /* Ok, there is definitely a card registering at the correct |
309 | * memory location, so now we do an I/O port test. |
310 | */ |
311 | |
312 | if (!test_hga_b(0x66, 0x0f)) /* cursor low register */ |
313 | goto error; |
314 | |
315 | if (!test_hga_b(0x99, 0x0f)) /* cursor low register */ |
316 | goto error; |
317 | |
318 | /* See if the card is a Hercules, by checking whether the vsync |
319 | * bit of the status register is changing. This test lasts for |
320 | * approximately 1/10th of a second. |
321 | */ |
322 | |
323 | p_save = q_save = inb_p(HGA_STATUS_PORT) & HGA_STATUS_VSYNC; |
324 | |
325 | for (count=0; count < 50000 && p_save == q_save; count++) { |
326 | q_save = inb(HGA_STATUS_PORT) & HGA_STATUS_VSYNC; |
327 | udelay(2); |
328 | } |
329 | |
330 | if (p_save == q_save) |
331 | goto error; |
332 | |
333 | switch (inb_p(HGA_STATUS_PORT) & 0x70) { |
334 | case 0x10: |
335 | hga_type = TYPE_HERCPLUS; |
336 | hga_type_name = "HerculesPlus"; |
337 | break; |
338 | case 0x50: |
339 | hga_type = TYPE_HERCCOLOR; |
340 | hga_type_name = "HerculesColor"; |
341 | break; |
342 | default: |
343 | hga_type = TYPE_HERC; |
344 | hga_type_name = "Hercules"; |
345 | break; |
346 | } |
347 | return 1; |
348 | error: |
349 | if (release_io_ports) |
350 | release_region(0x3b0, 12); |
351 | if (release_io_port) |
352 | release_region(0x3bf, 1); |
353 | return 0; |
354 | } |
355 | |
356 | /** |
357 | * hgafb_open - open the framebuffer device |
358 | * @info:pointer to fb_info object containing info for current hga board |
359 | * @int:open by console system or userland. |
360 | */ |
361 | |
362 | static int hgafb_open(struct fb_info *info, int init) |
363 | { |
364 | hga_gfx_mode(); |
365 | hga_clear_screen(); |
366 | if (!nologo) hga_show_logo(info); |
367 | return 0; |
368 | } |
369 | |
370 | /** |
371 | * hgafb_open - open the framebuffer device |
372 | * @info:pointer to fb_info object containing info for current hga board |
373 | * @int:open by console system or userland. |
374 | */ |
375 | |
376 | static int hgafb_release(struct fb_info *info, int init) |
377 | { |
378 | hga_txt_mode(); |
379 | hga_clear_screen(); |
380 | return 0; |
381 | } |
382 | |
383 | /** |
384 | * hgafb_setcolreg - set color registers |
385 | * @regno:register index to set |
386 | * @red:red value, unused |
387 | * @green:green value, unused |
388 | * @blue:blue value, unused |
389 | * @transp:transparency value, unused |
390 | * @info:unused |
391 | * |
392 | * This callback function is used to set the color registers of a HGA |
393 | * board. Since we have only two fixed colors only @regno is checked. |
394 | * A zero is returned on success and 1 for failure. |
395 | */ |
396 | |
397 | static int hgafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, |
398 | u_int transp, struct fb_info *info) |
399 | { |
400 | if (regno > 1) |
401 | return 1; |
402 | return 0; |
403 | } |
404 | |
405 | /** |
406 | * hga_pan_display - pan or wrap the display |
407 | * @var:contains new xoffset, yoffset and vmode values |
408 | * @info:pointer to fb_info object containing info for current hga board |
409 | * |
410 | * This function looks only at xoffset, yoffset and the %FB_VMODE_YWRAP |
411 | * flag in @var. If input parameters are correct it calls hga_pan() to |
412 | * program the hardware. @info->var is updated to the new values. |
413 | * A zero is returned on success and %-EINVAL for failure. |
414 | */ |
415 | |
416 | static int hgafb_pan_display(struct fb_var_screeninfo *var, |
417 | struct fb_info *info) |
418 | { |
419 | if (var->vmode & FB_VMODE_YWRAP) { |
420 | if (var->yoffset < 0 || |
421 | var->yoffset >= info->var.yres_virtual || |
422 | var->xoffset) |
423 | return -EINVAL; |
424 | } else { |
425 | if (var->xoffset + var->xres > info->var.xres_virtual |
426 | || var->yoffset + var->yres > info->var.yres_virtual |
427 | || var->yoffset % 8) |
428 | return -EINVAL; |
429 | } |
430 | |
431 | hga_pan(var->xoffset, var->yoffset); |
432 | return 0; |
433 | } |
434 | |
435 | /** |
436 | * hgafb_blank - (un)blank the screen |
437 | * @blank_mode:blanking method to use |
438 | * @info:unused |
439 | * |
440 | * Blank the screen if blank_mode != 0, else unblank. |
441 | * Implements VESA suspend and powerdown modes on hardware that supports |
442 | * disabling hsync/vsync: |
443 | * @blank_mode == 2 means suspend vsync, |
444 | * @blank_mode == 3 means suspend hsync, |
445 | * @blank_mode == 4 means powerdown. |
446 | */ |
447 | |
448 | static int hgafb_blank(int blank_mode, struct fb_info *info) |
449 | { |
450 | hga_blank(blank_mode); |
451 | return 0; |
452 | } |
453 | |
454 | /* |
455 | * Accel functions |
456 | */ |
457 | #ifdef CONFIG_FB_HGA_ACCEL |
458 | static void hgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) |
459 | { |
460 | u_int rows, y; |
461 | u8 __iomem *dest; |
462 | |
463 | y = rect->dy; |
464 | |
465 | for (rows = rect->height; rows--; y++) { |
466 | dest = rowaddr(info, y) + (rect->dx >> 3); |
467 | switch (rect->rop) { |
468 | case ROP_COPY: |
469 | //fb_memset(dest, rect->color, (rect->width >> 3)); |
470 | break; |
471 | case ROP_XOR: |
472 | fb_writeb(~(fb_readb(dest)), dest); |
473 | break; |
474 | } |
475 | } |
476 | } |
477 | |
478 | static void hgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area) |
479 | { |
480 | u_int rows, y1, y2; |
481 | u8 __iomem *src; |
482 | u8 __iomem *dest; |
483 | |
484 | if (area->dy <= area->sy) { |
485 | y1 = area->sy; |
486 | y2 = area->dy; |
487 | |
488 | for (rows = area->height; rows--; ) { |
489 | src = rowaddr(info, y1) + (area->sx >> 3); |
490 | dest = rowaddr(info, y2) + (area->dx >> 3); |
491 | //fb_memmove(dest, src, (area->width >> 3)); |
492 | y1++; |
493 | y2++; |
494 | } |
495 | } else { |
496 | y1 = area->sy + area->height - 1; |
497 | y2 = area->dy + area->height - 1; |
498 | |
499 | for (rows = area->height; rows--;) { |
500 | src = rowaddr(info, y1) + (area->sx >> 3); |
501 | dest = rowaddr(info, y2) + (area->dx >> 3); |
502 | //fb_memmove(dest, src, (area->width >> 3)); |
503 | y1--; |
504 | y2--; |
505 | } |
506 | } |
507 | } |
508 | |
509 | static void hgafb_imageblit(struct fb_info *info, const struct fb_image *image) |
510 | { |
511 | u8 __iomem *dest; |
512 | u8 *cdat = (u8 *) image->data; |
513 | u_int rows, y = image->dy; |
514 | u8 d; |
515 | |
516 | for (rows = image->height; rows--; y++) { |
517 | d = *cdat++; |
518 | dest = rowaddr(info, y) + (image->dx >> 3); |
519 | fb_writeb(d, dest); |
520 | } |
521 | } |
522 | #else /* !CONFIG_FB_HGA_ACCEL */ |
523 | #define hgafb_fillrect cfb_fillrect |
524 | #define hgafb_copyarea cfb_copyarea |
525 | #define hgafb_imageblit cfb_imageblit |
526 | #endif /* CONFIG_FB_HGA_ACCEL */ |
527 | |
528 | |
529 | static struct fb_ops hgafb_ops = { |
530 | .owner = THIS_MODULE, |
531 | .fb_open = hgafb_open, |
532 | .fb_release = hgafb_release, |
533 | .fb_setcolreg = hgafb_setcolreg, |
534 | .fb_pan_display = hgafb_pan_display, |
535 | .fb_blank = hgafb_blank, |
536 | .fb_fillrect = hgafb_fillrect, |
537 | .fb_copyarea = hgafb_copyarea, |
538 | .fb_imageblit = hgafb_imageblit, |
539 | }; |
540 | |
541 | /* ------------------------------------------------------------------------- * |
542 | * |
543 | * Functions in fb_info |
544 | * |
545 | * ------------------------------------------------------------------------- */ |
546 | |
547 | /* ------------------------------------------------------------------------- */ |
548 | |
549 | /* |
550 | * Initialization |
551 | */ |
552 | |
553 | static int __devinit hgafb_probe(struct platform_device *pdev) |
554 | { |
555 | struct fb_info *info; |
556 | |
557 | if (! hga_card_detect()) { |
558 | printk(KERN_INFO "hgafb: HGA card not detected.\n"); |
559 | if (hga_vram) |
560 | iounmap(hga_vram); |
561 | return -EINVAL; |
562 | } |
563 | |
564 | printk(KERN_INFO "hgafb: %s with %ldK of memory detected.\n", |
565 | hga_type_name, hga_vram_len/1024); |
566 | |
567 | info = framebuffer_alloc(0, &pdev->dev); |
568 | if (!info) { |
569 | iounmap(hga_vram); |
570 | return -ENOMEM; |
571 | } |
572 | |
573 | hga_fix.smem_start = (unsigned long)hga_vram; |
574 | hga_fix.smem_len = hga_vram_len; |
575 | |
576 | info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; |
577 | info->var = hga_default_var; |
578 | info->fix = hga_fix; |
579 | info->monspecs.hfmin = 0; |
580 | info->monspecs.hfmax = 0; |
581 | info->monspecs.vfmin = 10000; |
582 | info->monspecs.vfmax = 10000; |
583 | info->monspecs.dpms = 0; |
584 | info->fbops = &hgafb_ops; |
585 | info->screen_base = hga_vram; |
586 | |
587 | if (register_framebuffer(info) < 0) { |
588 | framebuffer_release(info); |
589 | iounmap(hga_vram); |
590 | return -EINVAL; |
591 | } |
592 | |
593 | printk(KERN_INFO "fb%d: %s frame buffer device\n", |
594 | info->node, info->fix.id); |
595 | platform_set_drvdata(pdev, info); |
596 | return 0; |
597 | } |
598 | |
599 | static int hgafb_remove(struct platform_device *pdev) |
600 | { |
601 | struct fb_info *info = platform_get_drvdata(pdev); |
602 | |
603 | hga_txt_mode(); |
604 | hga_clear_screen(); |
605 | |
606 | if (info) { |
607 | unregister_framebuffer(info); |
608 | framebuffer_release(info); |
609 | } |
610 | |
611 | iounmap(hga_vram); |
612 | |
613 | if (release_io_ports) |
614 | release_region(0x3b0, 12); |
615 | |
616 | if (release_io_port) |
617 | release_region(0x3bf, 1); |
618 | |
619 | return 0; |
620 | } |
621 | |
622 | static struct platform_driver hgafb_driver = { |
623 | .probe = hgafb_probe, |
624 | .remove = hgafb_remove, |
625 | .driver = { |
626 | .name = "hgafb", |
627 | }, |
628 | }; |
629 | |
630 | static struct platform_device *hgafb_device; |
631 | |
632 | static int __init hgafb_init(void) |
633 | { |
634 | int ret; |
635 | |
636 | if (fb_get_options("hgafb", NULL)) |
637 | return -ENODEV; |
638 | |
639 | ret = platform_driver_register(&hgafb_driver); |
640 | |
641 | if (!ret) { |
642 | hgafb_device = platform_device_register_simple("hgafb", 0, NULL, 0); |
643 | |
644 | if (IS_ERR(hgafb_device)) { |
645 | platform_driver_unregister(&hgafb_driver); |
646 | ret = PTR_ERR(hgafb_device); |
647 | } |
648 | } |
649 | |
650 | return ret; |
651 | } |
652 | |
653 | static void __exit hgafb_exit(void) |
654 | { |
655 | platform_device_unregister(hgafb_device); |
656 | platform_driver_unregister(&hgafb_driver); |
657 | } |
658 | |
659 | /* ------------------------------------------------------------------------- |
660 | * |
661 | * Modularization |
662 | * |
663 | * ------------------------------------------------------------------------- */ |
664 | |
665 | MODULE_AUTHOR("Ferenc Bakonyi (fero@drama.obuda.kando.hu)"); |
666 | MODULE_DESCRIPTION("FBDev driver for Hercules Graphics Adaptor"); |
667 | MODULE_LICENSE("GPL"); |
668 | |
669 | module_param(nologo, bool, 0); |
670 | MODULE_PARM_DESC(nologo, "Disables startup logo if != 0 (default=0)"); |
671 | module_init(hgafb_init); |
672 | module_exit(hgafb_exit); |
673 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
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