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 const struct fb_var_screeninfo 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 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 bool 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(value: reg, HGA_INDEX_PORT); |
147 | outb_p(value: val, HGA_VALUE_PORT); |
148 | } |
149 | |
150 | static void write_hga_w(unsigned int val, unsigned char reg) |
151 | { |
152 | outb_p(value: reg, HGA_INDEX_PORT); outb_p(value: val >> 8, HGA_VALUE_PORT); |
153 | outb_p(value: reg+1, HGA_INDEX_PORT); outb_p(value: val & 0xff, HGA_VALUE_PORT); |
154 | } |
155 | |
156 | static int test_hga_b(unsigned char val, unsigned char reg) |
157 | { |
158 | outb_p(value: reg, HGA_INDEX_PORT); |
159 | outb (value: 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(lock: &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(value: 0x00, HGA_GFX_PORT); |
186 | outb_p(value: 0x00, HGA_STATUS_PORT); |
187 | |
188 | write_hga_b(val: 0x61, reg: 0x00); /* horizontal total */ |
189 | write_hga_b(val: 0x50, reg: 0x01); /* horizontal displayed */ |
190 | write_hga_b(val: 0x52, reg: 0x02); /* horizontal sync pos */ |
191 | write_hga_b(val: 0x0f, reg: 0x03); /* horizontal sync width */ |
192 | |
193 | write_hga_b(val: 0x19, reg: 0x04); /* vertical total */ |
194 | write_hga_b(val: 0x06, reg: 0x05); /* vertical total adjust */ |
195 | write_hga_b(val: 0x19, reg: 0x06); /* vertical displayed */ |
196 | write_hga_b(val: 0x19, reg: 0x07); /* vertical sync pos */ |
197 | |
198 | write_hga_b(val: 0x02, reg: 0x08); /* interlace mode */ |
199 | write_hga_b(val: 0x0d, reg: 0x09); /* maximum scanline */ |
200 | write_hga_b(val: 0x0c, reg: 0x0a); /* cursor start */ |
201 | write_hga_b(val: 0x0d, reg: 0x0b); /* cursor end */ |
202 | |
203 | write_hga_w(val: 0x0000, reg: 0x0c); /* start address */ |
204 | write_hga_w(val: 0x0000, reg: 0x0e); /* cursor location */ |
205 | |
206 | hga_mode = HGA_TXT; |
207 | spin_unlock_irqrestore(lock: &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(value: 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(val: 0x35, reg: 0x00); /* horizontal total */ |
220 | write_hga_b(val: 0x2d, reg: 0x01); /* horizontal displayed */ |
221 | write_hga_b(val: 0x2e, reg: 0x02); /* horizontal sync pos */ |
222 | write_hga_b(val: 0x07, reg: 0x03); /* horizontal sync width */ |
223 | |
224 | write_hga_b(val: 0x5b, reg: 0x04); /* vertical total */ |
225 | write_hga_b(val: 0x02, reg: 0x05); /* vertical total adjust */ |
226 | write_hga_b(val: 0x57, reg: 0x06); /* vertical displayed */ |
227 | write_hga_b(val: 0x57, reg: 0x07); /* vertical sync pos */ |
228 | |
229 | write_hga_b(val: 0x02, reg: 0x08); /* interlace mode */ |
230 | write_hga_b(val: 0x03, reg: 0x09); /* maximum scanline */ |
231 | write_hga_b(val: 0x00, reg: 0x0a); /* cursor start */ |
232 | write_hga_b(val: 0x00, reg: 0x0b); /* cursor end */ |
233 | |
234 | write_hga_w(val: 0x0000, reg: 0x0c); /* start address */ |
235 | write_hga_w(val: 0x0000, reg: 0x0e); /* cursor location */ |
236 | |
237 | hga_mode = HGA_GFX; |
238 | spin_unlock_irqrestore(lock: &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(val: base, reg: 0x0c); /* start address */ |
262 | spin_unlock_irqrestore(lock: &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(value: 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(lock: &hga_reg_lock, flags); |
277 | } |
278 | |
279 | static int 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(offset: 0xb0000, size: hga_vram_len); |
288 | if (!hga_vram) |
289 | return -ENOMEM; |
290 | |
291 | if (request_region(0x3b0, 12, "hgafb" )) |
292 | release_io_ports = 1; |
293 | if (request_region(0x3bf, 1, "hgafb" )) |
294 | release_io_port = 1; |
295 | |
296 | /* do a memory check */ |
297 | |
298 | p = hga_vram; |
299 | q = hga_vram + 0x01000; |
300 | |
301 | p_save = readw(addr: p); q_save = readw(addr: q); |
302 | |
303 | writew(val: 0xaa55, addr: p); if (readw(addr: p) == 0xaa55) count++; |
304 | writew(val: 0x55aa, addr: p); if (readw(addr: p) == 0x55aa) count++; |
305 | writew(val: p_save, addr: p); |
306 | |
307 | if (count != 2) |
308 | goto error; |
309 | |
310 | /* Ok, there is definitely a card registering at the correct |
311 | * memory location, so now we do an I/O port test. |
312 | */ |
313 | |
314 | if (!test_hga_b(val: 0x66, reg: 0x0f)) /* cursor low register */ |
315 | goto error; |
316 | |
317 | if (!test_hga_b(val: 0x99, reg: 0x0f)) /* cursor low register */ |
318 | goto error; |
319 | |
320 | /* See if the card is a Hercules, by checking whether the vsync |
321 | * bit of the status register is changing. This test lasts for |
322 | * approximately 1/10th of a second. |
323 | */ |
324 | |
325 | p_save = q_save = inb_p(HGA_STATUS_PORT) & HGA_STATUS_VSYNC; |
326 | |
327 | for (count=0; count < 50000 && p_save == q_save; count++) { |
328 | q_save = inb(HGA_STATUS_PORT) & HGA_STATUS_VSYNC; |
329 | udelay(2); |
330 | } |
331 | |
332 | if (p_save == q_save) |
333 | goto error; |
334 | |
335 | switch (inb_p(HGA_STATUS_PORT) & 0x70) { |
336 | case 0x10: |
337 | hga_type = TYPE_HERCPLUS; |
338 | hga_type_name = "HerculesPlus" ; |
339 | break; |
340 | case 0x50: |
341 | hga_type = TYPE_HERCCOLOR; |
342 | hga_type_name = "HerculesColor" ; |
343 | break; |
344 | default: |
345 | hga_type = TYPE_HERC; |
346 | hga_type_name = "Hercules" ; |
347 | break; |
348 | } |
349 | return 0; |
350 | error: |
351 | if (release_io_ports) |
352 | release_region(0x3b0, 12); |
353 | if (release_io_port) |
354 | release_region(0x3bf, 1); |
355 | |
356 | iounmap(addr: hga_vram); |
357 | |
358 | pr_err("hgafb: HGA card not detected.\n" ); |
359 | |
360 | return -EINVAL; |
361 | } |
362 | |
363 | /** |
364 | * hgafb_open - open the framebuffer device |
365 | * @info: pointer to fb_info object containing info for current hga board |
366 | * @init: open by console system or userland. |
367 | * |
368 | * Returns: %0 |
369 | */ |
370 | |
371 | static int hgafb_open(struct fb_info *info, int init) |
372 | { |
373 | hga_gfx_mode(); |
374 | hga_clear_screen(); |
375 | if (!nologo) hga_show_logo(info); |
376 | return 0; |
377 | } |
378 | |
379 | /** |
380 | * hgafb_release - open the framebuffer device |
381 | * @info: pointer to fb_info object containing info for current hga board |
382 | * @init: open by console system or userland. |
383 | * |
384 | * Returns: %0 |
385 | */ |
386 | |
387 | static int hgafb_release(struct fb_info *info, int init) |
388 | { |
389 | hga_txt_mode(); |
390 | hga_clear_screen(); |
391 | return 0; |
392 | } |
393 | |
394 | /** |
395 | * hgafb_setcolreg - set color registers |
396 | * @regno:register index to set |
397 | * @red:red value, unused |
398 | * @green:green value, unused |
399 | * @blue:blue value, unused |
400 | * @transp:transparency value, unused |
401 | * @info:unused |
402 | * |
403 | * This callback function is used to set the color registers of a HGA |
404 | * board. Since we have only two fixed colors only @regno is checked. |
405 | * A zero is returned on success and 1 for failure. |
406 | * |
407 | * Returns: %0 |
408 | */ |
409 | |
410 | static int hgafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, |
411 | u_int transp, struct fb_info *info) |
412 | { |
413 | if (regno > 1) |
414 | return 1; |
415 | return 0; |
416 | } |
417 | |
418 | /** |
419 | * hgafb_pan_display - pan or wrap the display |
420 | * @var:contains new xoffset, yoffset and vmode values |
421 | * @info:pointer to fb_info object containing info for current hga board |
422 | * |
423 | * This function looks only at xoffset, yoffset and the %FB_VMODE_YWRAP |
424 | * flag in @var. If input parameters are correct it calls hga_pan() to |
425 | * program the hardware. @info->var is updated to the new values. |
426 | * |
427 | * Returns: %0 on success or %-EINVAL for failure. |
428 | */ |
429 | |
430 | static int hgafb_pan_display(struct fb_var_screeninfo *var, |
431 | struct fb_info *info) |
432 | { |
433 | if (var->vmode & FB_VMODE_YWRAP) { |
434 | if (var->yoffset >= info->var.yres_virtual || |
435 | var->xoffset) |
436 | return -EINVAL; |
437 | } else { |
438 | if (var->xoffset + info->var.xres > info->var.xres_virtual |
439 | || var->yoffset + info->var.yres > info->var.yres_virtual |
440 | || var->yoffset % 8) |
441 | return -EINVAL; |
442 | } |
443 | |
444 | hga_pan(xoffset: var->xoffset, yoffset: var->yoffset); |
445 | return 0; |
446 | } |
447 | |
448 | /** |
449 | * hgafb_blank - (un)blank the screen |
450 | * @blank_mode:blanking method to use |
451 | * @info:unused |
452 | * |
453 | * Blank the screen if blank_mode != 0, else unblank. |
454 | * Implements VESA suspend and powerdown modes on hardware that supports |
455 | * disabling hsync/vsync: |
456 | * @blank_mode == 2 means suspend vsync, |
457 | * @blank_mode == 3 means suspend hsync, |
458 | * @blank_mode == 4 means powerdown. |
459 | * |
460 | * Returns: %0 |
461 | */ |
462 | |
463 | static int hgafb_blank(int blank_mode, struct fb_info *info) |
464 | { |
465 | hga_blank(blank_mode); |
466 | return 0; |
467 | } |
468 | |
469 | /* |
470 | * Accel functions |
471 | */ |
472 | static void hgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) |
473 | { |
474 | u_int rows, y; |
475 | u8 __iomem *dest; |
476 | |
477 | y = rect->dy; |
478 | |
479 | for (rows = rect->height; rows--; y++) { |
480 | dest = rowaddr(info, row: y) + (rect->dx >> 3); |
481 | switch (rect->rop) { |
482 | case ROP_COPY: |
483 | memset_io(dest, rect->color, (rect->width >> 3)); |
484 | break; |
485 | case ROP_XOR: |
486 | fb_writeb(b: ~(fb_readb(addr: dest)), addr: dest); |
487 | break; |
488 | } |
489 | } |
490 | } |
491 | |
492 | static void hgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area) |
493 | { |
494 | u_int rows, y1, y2; |
495 | u8 __iomem *src; |
496 | u8 __iomem *dest; |
497 | |
498 | if (area->dy <= area->sy) { |
499 | y1 = area->sy; |
500 | y2 = area->dy; |
501 | |
502 | for (rows = area->height; rows--; ) { |
503 | src = rowaddr(info, row: y1) + (area->sx >> 3); |
504 | dest = rowaddr(info, row: y2) + (area->dx >> 3); |
505 | memmove(dest, src, (area->width >> 3)); |
506 | y1++; |
507 | y2++; |
508 | } |
509 | } else { |
510 | y1 = area->sy + area->height - 1; |
511 | y2 = area->dy + area->height - 1; |
512 | |
513 | for (rows = area->height; rows--;) { |
514 | src = rowaddr(info, row: y1) + (area->sx >> 3); |
515 | dest = rowaddr(info, row: y2) + (area->dx >> 3); |
516 | memmove(dest, src, (area->width >> 3)); |
517 | y1--; |
518 | y2--; |
519 | } |
520 | } |
521 | } |
522 | |
523 | static void hgafb_imageblit(struct fb_info *info, const struct fb_image *image) |
524 | { |
525 | u8 __iomem *dest; |
526 | u8 *cdat = (u8 *) image->data; |
527 | u_int rows, y = image->dy; |
528 | u_int x; |
529 | u8 d; |
530 | |
531 | for (rows = image->height; rows--; y++) { |
532 | for (x = 0; x < image->width; x+= 8) { |
533 | d = *cdat++; |
534 | dest = rowaddr(info, row: y) + ((image->dx + x)>> 3); |
535 | fb_writeb(b: d, addr: dest); |
536 | } |
537 | } |
538 | } |
539 | |
540 | static const struct fb_ops hgafb_ops = { |
541 | .owner = THIS_MODULE, |
542 | .fb_open = hgafb_open, |
543 | .fb_release = hgafb_release, |
544 | __FB_DEFAULT_IOMEM_OPS_RDWR, |
545 | .fb_setcolreg = hgafb_setcolreg, |
546 | .fb_pan_display = hgafb_pan_display, |
547 | .fb_blank = hgafb_blank, |
548 | .fb_fillrect = hgafb_fillrect, |
549 | .fb_copyarea = hgafb_copyarea, |
550 | .fb_imageblit = hgafb_imageblit, |
551 | __FB_DEFAULT_IOMEM_OPS_MMAP, |
552 | }; |
553 | |
554 | /* ------------------------------------------------------------------------- * |
555 | * |
556 | * Functions in fb_info |
557 | * |
558 | * ------------------------------------------------------------------------- */ |
559 | |
560 | /* ------------------------------------------------------------------------- */ |
561 | |
562 | /* |
563 | * Initialization |
564 | */ |
565 | |
566 | static int hgafb_probe(struct platform_device *pdev) |
567 | { |
568 | struct fb_info *info; |
569 | int ret; |
570 | |
571 | ret = hga_card_detect(); |
572 | if (ret) |
573 | return ret; |
574 | |
575 | printk(KERN_INFO "hgafb: %s with %ldK of memory detected.\n" , |
576 | hga_type_name, hga_vram_len/1024); |
577 | |
578 | info = framebuffer_alloc(size: 0, dev: &pdev->dev); |
579 | if (!info) { |
580 | iounmap(addr: hga_vram); |
581 | return -ENOMEM; |
582 | } |
583 | |
584 | hga_fix.smem_start = (unsigned long)hga_vram; |
585 | hga_fix.smem_len = hga_vram_len; |
586 | |
587 | info->flags = FBINFO_HWACCEL_YPAN; |
588 | info->var = hga_default_var; |
589 | info->fix = hga_fix; |
590 | info->monspecs.hfmin = 0; |
591 | info->monspecs.hfmax = 0; |
592 | info->monspecs.vfmin = 10000; |
593 | info->monspecs.vfmax = 10000; |
594 | info->monspecs.dpms = 0; |
595 | info->fbops = &hgafb_ops; |
596 | info->screen_base = hga_vram; |
597 | |
598 | if (register_framebuffer(fb_info: info) < 0) { |
599 | framebuffer_release(info); |
600 | iounmap(addr: hga_vram); |
601 | return -EINVAL; |
602 | } |
603 | |
604 | fb_info(info, "%s frame buffer device\n" , info->fix.id); |
605 | platform_set_drvdata(pdev, data: info); |
606 | return 0; |
607 | } |
608 | |
609 | static void hgafb_remove(struct platform_device *pdev) |
610 | { |
611 | struct fb_info *info = platform_get_drvdata(pdev); |
612 | |
613 | hga_txt_mode(); |
614 | hga_clear_screen(); |
615 | |
616 | if (info) { |
617 | unregister_framebuffer(fb_info: info); |
618 | framebuffer_release(info); |
619 | } |
620 | |
621 | iounmap(addr: hga_vram); |
622 | |
623 | if (release_io_ports) |
624 | release_region(0x3b0, 12); |
625 | |
626 | if (release_io_port) |
627 | release_region(0x3bf, 1); |
628 | } |
629 | |
630 | static struct platform_driver hgafb_driver = { |
631 | .probe = hgafb_probe, |
632 | .remove_new = hgafb_remove, |
633 | .driver = { |
634 | .name = "hgafb" , |
635 | }, |
636 | }; |
637 | |
638 | static struct platform_device *hgafb_device; |
639 | |
640 | static int __init hgafb_init(void) |
641 | { |
642 | int ret; |
643 | |
644 | if (fb_get_options(name: "hgafb" , NULL)) |
645 | return -ENODEV; |
646 | |
647 | ret = platform_driver_register(&hgafb_driver); |
648 | |
649 | if (!ret) { |
650 | hgafb_device = platform_device_register_simple(name: "hgafb" , id: 0, NULL, num: 0); |
651 | |
652 | if (IS_ERR(ptr: hgafb_device)) { |
653 | platform_driver_unregister(&hgafb_driver); |
654 | ret = PTR_ERR(ptr: hgafb_device); |
655 | } |
656 | } |
657 | |
658 | return ret; |
659 | } |
660 | |
661 | static void __exit hgafb_exit(void) |
662 | { |
663 | platform_device_unregister(hgafb_device); |
664 | platform_driver_unregister(&hgafb_driver); |
665 | } |
666 | |
667 | /* ------------------------------------------------------------------------- |
668 | * |
669 | * Modularization |
670 | * |
671 | * ------------------------------------------------------------------------- */ |
672 | |
673 | MODULE_AUTHOR("Ferenc Bakonyi <fero@drama.obuda.kando.hu>" ); |
674 | MODULE_DESCRIPTION("FBDev driver for Hercules Graphics Adaptor" ); |
675 | MODULE_LICENSE("GPL" ); |
676 | |
677 | module_param(nologo, bool, 0); |
678 | MODULE_PARM_DESC(nologo, "Disables startup logo if != 0 (default=0)" ); |
679 | module_init(hgafb_init); |
680 | module_exit(hgafb_exit); |
681 | |