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1da177e4 LT |
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> | |
1da177e4 LT |
39 | #include <linux/slab.h> |
40 | #include <linux/delay.h> | |
41 | #include <linux/fb.h> | |
42 | #include <linux/init.h> | |
43 | #include <linux/ioport.h> | |
1d204ef3 | 44 | #include <linux/platform_device.h> |
1da177e4 LT |
45 | #include <asm/io.h> |
46 | #include <asm/vga.h> | |
47 | ||
48 | #if 0 | |
49 | #define DPRINTK(args...) printk(KERN_DEBUG __FILE__": " ##args) | |
50 | #else | |
51 | #define DPRINTK(args...) | |
52 | #endif | |
53 | ||
54 | #if 0 | |
55 | #define CHKINFO(ret) if (info != &fb_info) { printk(KERN_DEBUG __FILE__": This should never happen, line:%d \n", __LINE__); return ret; } | |
56 | #else | |
57 | #define CHKINFO(ret) | |
58 | #endif | |
59 | ||
60 | /* Description of the hardware layout */ | |
61 | ||
62 | static void __iomem *hga_vram; /* Base of video memory */ | |
63 | static unsigned long hga_vram_len; /* Size of video memory */ | |
64 | ||
65 | #define HGA_ROWADDR(row) ((row%4)*8192 + (row>>2)*90) | |
66 | #define HGA_TXT 0 | |
67 | #define HGA_GFX 1 | |
68 | ||
69 | static inline u8 __iomem * rowaddr(struct fb_info *info, u_int row) | |
70 | { | |
71 | return info->screen_base + HGA_ROWADDR(row); | |
72 | } | |
73 | ||
74 | static int hga_mode = -1; /* 0 = txt, 1 = gfx mode */ | |
75 | ||
76 | static enum { TYPE_HERC, TYPE_HERCPLUS, TYPE_HERCCOLOR } hga_type; | |
77 | static char *hga_type_name; | |
78 | ||
79 | #define HGA_INDEX_PORT 0x3b4 /* Register select port */ | |
80 | #define HGA_VALUE_PORT 0x3b5 /* Register value port */ | |
81 | #define HGA_MODE_PORT 0x3b8 /* Mode control port */ | |
82 | #define HGA_STATUS_PORT 0x3ba /* Status and Config port */ | |
83 | #define HGA_GFX_PORT 0x3bf /* Graphics control port */ | |
84 | ||
85 | /* HGA register values */ | |
86 | ||
87 | #define HGA_CURSOR_BLINKING 0x00 | |
88 | #define HGA_CURSOR_OFF 0x20 | |
89 | #define HGA_CURSOR_SLOWBLINK 0x60 | |
90 | ||
91 | #define HGA_MODE_GRAPHICS 0x02 | |
92 | #define HGA_MODE_VIDEO_EN 0x08 | |
93 | #define HGA_MODE_BLINK_EN 0x20 | |
94 | #define HGA_MODE_GFX_PAGE1 0x80 | |
95 | ||
96 | #define HGA_STATUS_HSYNC 0x01 | |
97 | #define HGA_STATUS_VSYNC 0x80 | |
98 | #define HGA_STATUS_VIDEO 0x08 | |
99 | ||
100 | #define HGA_CONFIG_COL132 0x08 | |
101 | #define HGA_GFX_MODE_EN 0x01 | |
102 | #define HGA_GFX_PAGE_EN 0x02 | |
103 | ||
104 | /* Global locks */ | |
105 | ||
106 | static DEFINE_SPINLOCK(hga_reg_lock); | |
107 | ||
108 | /* Framebuffer driver structures */ | |
109 | ||
1d204ef3 | 110 | static struct fb_var_screeninfo __initdata hga_default_var = { |
1da177e4 LT |
111 | .xres = 720, |
112 | .yres = 348, | |
113 | .xres_virtual = 720, | |
114 | .yres_virtual = 348, | |
115 | .bits_per_pixel = 1, | |
116 | .red = {0, 1, 0}, | |
117 | .green = {0, 1, 0}, | |
118 | .blue = {0, 1, 0}, | |
119 | .transp = {0, 0, 0}, | |
120 | .height = -1, | |
121 | .width = -1, | |
122 | }; | |
123 | ||
1d204ef3 | 124 | static struct fb_fix_screeninfo __initdata hga_fix = { |
1da177e4 LT |
125 | .id = "HGA", |
126 | .type = FB_TYPE_PACKED_PIXELS, /* (not sure) */ | |
127 | .visual = FB_VISUAL_MONO10, | |
128 | .xpanstep = 8, | |
129 | .ypanstep = 8, | |
130 | .line_length = 90, | |
131 | .accel = FB_ACCEL_NONE | |
132 | }; | |
133 | ||
1da177e4 LT |
134 | /* Don't assume that tty1 will be the initial current console. */ |
135 | static int release_io_port = 0; | |
136 | static int release_io_ports = 0; | |
137 | static int nologo = 0; | |
138 | ||
139 | /* ------------------------------------------------------------------------- | |
140 | * | |
141 | * Low level hardware functions | |
142 | * | |
143 | * ------------------------------------------------------------------------- */ | |
144 | ||
145 | static void write_hga_b(unsigned int val, unsigned char reg) | |
146 | { | |
147 | outb_p(reg, HGA_INDEX_PORT); | |
148 | outb_p(val, HGA_VALUE_PORT); | |
149 | } | |
150 | ||
151 | static void write_hga_w(unsigned int val, unsigned char reg) | |
152 | { | |
153 | outb_p(reg, HGA_INDEX_PORT); outb_p(val >> 8, HGA_VALUE_PORT); | |
154 | outb_p(reg+1, HGA_INDEX_PORT); outb_p(val & 0xff, HGA_VALUE_PORT); | |
155 | } | |
156 | ||
157 | static int test_hga_b(unsigned char val, unsigned char reg) | |
158 | { | |
159 | outb_p(reg, HGA_INDEX_PORT); | |
160 | outb (val, HGA_VALUE_PORT); | |
161 | udelay(20); val = (inb_p(HGA_VALUE_PORT) == val); | |
162 | return val; | |
163 | } | |
164 | ||
165 | static void hga_clear_screen(void) | |
166 | { | |
167 | unsigned char fillchar = 0xbf; /* magic */ | |
168 | unsigned long flags; | |
169 | ||
170 | spin_lock_irqsave(&hga_reg_lock, flags); | |
171 | if (hga_mode == HGA_TXT) | |
172 | fillchar = ' '; | |
173 | else if (hga_mode == HGA_GFX) | |
174 | fillchar = 0x00; | |
175 | spin_unlock_irqrestore(&hga_reg_lock, flags); | |
176 | if (fillchar != 0xbf) | |
177 | memset_io(hga_vram, fillchar, hga_vram_len); | |
178 | } | |
179 | ||
180 | static void hga_txt_mode(void) | |
181 | { | |
182 | unsigned long flags; | |
183 | ||
184 | spin_lock_irqsave(&hga_reg_lock, flags); | |
185 | outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_BLINK_EN, HGA_MODE_PORT); | |
186 | outb_p(0x00, HGA_GFX_PORT); | |
187 | outb_p(0x00, HGA_STATUS_PORT); | |
188 | ||
189 | write_hga_b(0x61, 0x00); /* horizontal total */ | |
190 | write_hga_b(0x50, 0x01); /* horizontal displayed */ | |
191 | write_hga_b(0x52, 0x02); /* horizontal sync pos */ | |
192 | write_hga_b(0x0f, 0x03); /* horizontal sync width */ | |
193 | ||
194 | write_hga_b(0x19, 0x04); /* vertical total */ | |
195 | write_hga_b(0x06, 0x05); /* vertical total adjust */ | |
196 | write_hga_b(0x19, 0x06); /* vertical displayed */ | |
197 | write_hga_b(0x19, 0x07); /* vertical sync pos */ | |
198 | ||
199 | write_hga_b(0x02, 0x08); /* interlace mode */ | |
200 | write_hga_b(0x0d, 0x09); /* maximum scanline */ | |
201 | write_hga_b(0x0c, 0x0a); /* cursor start */ | |
202 | write_hga_b(0x0d, 0x0b); /* cursor end */ | |
203 | ||
204 | write_hga_w(0x0000, 0x0c); /* start address */ | |
205 | write_hga_w(0x0000, 0x0e); /* cursor location */ | |
206 | ||
207 | hga_mode = HGA_TXT; | |
208 | spin_unlock_irqrestore(&hga_reg_lock, flags); | |
209 | } | |
210 | ||
211 | static void hga_gfx_mode(void) | |
212 | { | |
213 | unsigned long flags; | |
214 | ||
215 | spin_lock_irqsave(&hga_reg_lock, flags); | |
216 | outb_p(0x00, HGA_STATUS_PORT); | |
217 | outb_p(HGA_GFX_MODE_EN, HGA_GFX_PORT); | |
218 | outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT); | |
219 | ||
220 | write_hga_b(0x35, 0x00); /* horizontal total */ | |
221 | write_hga_b(0x2d, 0x01); /* horizontal displayed */ | |
222 | write_hga_b(0x2e, 0x02); /* horizontal sync pos */ | |
223 | write_hga_b(0x07, 0x03); /* horizontal sync width */ | |
224 | ||
225 | write_hga_b(0x5b, 0x04); /* vertical total */ | |
226 | write_hga_b(0x02, 0x05); /* vertical total adjust */ | |
227 | write_hga_b(0x57, 0x06); /* vertical displayed */ | |
228 | write_hga_b(0x57, 0x07); /* vertical sync pos */ | |
229 | ||
230 | write_hga_b(0x02, 0x08); /* interlace mode */ | |
231 | write_hga_b(0x03, 0x09); /* maximum scanline */ | |
232 | write_hga_b(0x00, 0x0a); /* cursor start */ | |
233 | write_hga_b(0x00, 0x0b); /* cursor end */ | |
234 | ||
235 | write_hga_w(0x0000, 0x0c); /* start address */ | |
236 | write_hga_w(0x0000, 0x0e); /* cursor location */ | |
237 | ||
238 | hga_mode = HGA_GFX; | |
239 | spin_unlock_irqrestore(&hga_reg_lock, flags); | |
240 | } | |
241 | ||
242 | static void hga_show_logo(struct fb_info *info) | |
243 | { | |
244 | /* | |
245 | void __iomem *dest = hga_vram; | |
246 | char *logo = linux_logo_bw; | |
247 | int x, y; | |
248 | ||
249 | for (y = 134; y < 134 + 80 ; y++) * this needs some cleanup * | |
250 | for (x = 0; x < 10 ; x++) | |
251 | writeb(~*(logo++),(dest + HGA_ROWADDR(y) + x + 40)); | |
252 | */ | |
253 | } | |
254 | ||
255 | static void hga_pan(unsigned int xoffset, unsigned int yoffset) | |
256 | { | |
257 | unsigned int base; | |
258 | unsigned long flags; | |
259 | ||
260 | base = (yoffset / 8) * 90 + xoffset; | |
261 | spin_lock_irqsave(&hga_reg_lock, flags); | |
262 | write_hga_w(base, 0x0c); /* start address */ | |
263 | spin_unlock_irqrestore(&hga_reg_lock, flags); | |
264 | DPRINTK("hga_pan: base:%d\n", base); | |
265 | } | |
266 | ||
267 | static void hga_blank(int blank_mode) | |
268 | { | |
269 | unsigned long flags; | |
270 | ||
271 | spin_lock_irqsave(&hga_reg_lock, flags); | |
272 | if (blank_mode) { | |
273 | outb_p(0x00, HGA_MODE_PORT); /* disable video */ | |
274 | } else { | |
275 | outb_p(HGA_MODE_VIDEO_EN | HGA_MODE_GRAPHICS, HGA_MODE_PORT); | |
276 | } | |
277 | spin_unlock_irqrestore(&hga_reg_lock, flags); | |
278 | } | |
279 | ||
280 | static int __init hga_card_detect(void) | |
281 | { | |
630c2701 | 282 | int count = 0; |
1da177e4 LT |
283 | void __iomem *p, *q; |
284 | unsigned short p_save, q_save; | |
285 | ||
286 | hga_vram_len = 0x08000; | |
287 | ||
288 | hga_vram = ioremap(0xb0000, hga_vram_len); | |
289 | ||
290 | if (request_region(0x3b0, 12, "hgafb")) | |
291 | release_io_ports = 1; | |
292 | if (request_region(0x3bf, 1, "hgafb")) | |
293 | release_io_port = 1; | |
294 | ||
295 | /* do a memory check */ | |
296 | ||
297 | p = hga_vram; | |
298 | q = hga_vram + 0x01000; | |
299 | ||
300 | p_save = readw(p); q_save = readw(q); | |
301 | ||
302 | writew(0xaa55, p); if (readw(p) == 0xaa55) count++; | |
303 | writew(0x55aa, p); if (readw(p) == 0x55aa) count++; | |
304 | writew(p_save, p); | |
305 | ||
630c2701 KH |
306 | if (count != 2) |
307 | goto error; | |
1da177e4 LT |
308 | |
309 | /* Ok, there is definitely a card registering at the correct | |
310 | * memory location, so now we do an I/O port test. | |
311 | */ | |
312 | ||
630c2701 KH |
313 | if (!test_hga_b(0x66, 0x0f)) /* cursor low register */ |
314 | goto error; | |
315 | ||
316 | if (!test_hga_b(0x99, 0x0f)) /* cursor low register */ | |
317 | goto error; | |
1da177e4 LT |
318 | |
319 | /* See if the card is a Hercules, by checking whether the vsync | |
320 | * bit of the status register is changing. This test lasts for | |
321 | * approximately 1/10th of a second. | |
322 | */ | |
323 | ||
324 | p_save = q_save = inb_p(HGA_STATUS_PORT) & HGA_STATUS_VSYNC; | |
325 | ||
326 | for (count=0; count < 50000 && p_save == q_save; count++) { | |
327 | q_save = inb(HGA_STATUS_PORT) & HGA_STATUS_VSYNC; | |
328 | udelay(2); | |
329 | } | |
330 | ||
331 | if (p_save == q_save) | |
630c2701 | 332 | goto error; |
1da177e4 LT |
333 | |
334 | switch (inb_p(HGA_STATUS_PORT) & 0x70) { | |
335 | case 0x10: | |
336 | hga_type = TYPE_HERCPLUS; | |
337 | hga_type_name = "HerculesPlus"; | |
338 | break; | |
339 | case 0x50: | |
340 | hga_type = TYPE_HERCCOLOR; | |
341 | hga_type_name = "HerculesColor"; | |
342 | break; | |
343 | default: | |
344 | hga_type = TYPE_HERC; | |
345 | hga_type_name = "Hercules"; | |
346 | break; | |
347 | } | |
348 | return 1; | |
630c2701 KH |
349 | error: |
350 | if (release_io_ports) | |
351 | release_region(0x3b0, 12); | |
352 | if (release_io_port) | |
353 | release_region(0x3bf, 1); | |
354 | return 0; | |
1da177e4 LT |
355 | } |
356 | ||
357 | /** | |
358 | * hgafb_open - open the framebuffer device | |
359 | * @info:pointer to fb_info object containing info for current hga board | |
360 | * @int:open by console system or userland. | |
361 | */ | |
362 | ||
363 | static int hgafb_open(struct fb_info *info, int init) | |
364 | { | |
365 | hga_gfx_mode(); | |
366 | hga_clear_screen(); | |
367 | if (!nologo) hga_show_logo(info); | |
368 | return 0; | |
369 | } | |
370 | ||
371 | /** | |
372 | * hgafb_open - open the framebuffer device | |
373 | * @info:pointer to fb_info object containing info for current hga board | |
374 | * @int:open by console system or userland. | |
375 | */ | |
376 | ||
377 | static int hgafb_release(struct fb_info *info, int init) | |
378 | { | |
379 | hga_txt_mode(); | |
380 | hga_clear_screen(); | |
381 | return 0; | |
382 | } | |
383 | ||
384 | /** | |
385 | * hgafb_setcolreg - set color registers | |
386 | * @regno:register index to set | |
387 | * @red:red value, unused | |
388 | * @green:green value, unused | |
389 | * @blue:blue value, unused | |
390 | * @transp:transparency value, unused | |
391 | * @info:unused | |
392 | * | |
393 | * This callback function is used to set the color registers of a HGA | |
394 | * board. Since we have only two fixed colors only @regno is checked. | |
395 | * A zero is returned on success and 1 for failure. | |
396 | */ | |
397 | ||
398 | static int hgafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
399 | u_int transp, struct fb_info *info) | |
400 | { | |
401 | if (regno > 1) | |
402 | return 1; | |
403 | return 0; | |
404 | } | |
405 | ||
406 | /** | |
407 | * hga_pan_display - pan or wrap the display | |
408 | * @var:contains new xoffset, yoffset and vmode values | |
409 | * @info:pointer to fb_info object containing info for current hga board | |
410 | * | |
411 | * This function looks only at xoffset, yoffset and the %FB_VMODE_YWRAP | |
412 | * flag in @var. If input parameters are correct it calls hga_pan() to | |
413 | * program the hardware. @info->var is updated to the new values. | |
414 | * A zero is returned on success and %-EINVAL for failure. | |
415 | */ | |
416 | ||
417 | static int hgafb_pan_display(struct fb_var_screeninfo *var, | |
418 | struct fb_info *info) | |
419 | { | |
420 | if (var->vmode & FB_VMODE_YWRAP) { | |
421 | if (var->yoffset < 0 || | |
422 | var->yoffset >= info->var.yres_virtual || | |
423 | var->xoffset) | |
424 | return -EINVAL; | |
425 | } else { | |
426 | if (var->xoffset + var->xres > info->var.xres_virtual | |
427 | || var->yoffset + var->yres > info->var.yres_virtual | |
428 | || var->yoffset % 8) | |
429 | return -EINVAL; | |
430 | } | |
431 | ||
432 | hga_pan(var->xoffset, var->yoffset); | |
433 | return 0; | |
434 | } | |
435 | ||
436 | /** | |
437 | * hgafb_blank - (un)blank the screen | |
438 | * @blank_mode:blanking method to use | |
439 | * @info:unused | |
440 | * | |
441 | * Blank the screen if blank_mode != 0, else unblank. | |
442 | * Implements VESA suspend and powerdown modes on hardware that supports | |
443 | * disabling hsync/vsync: | |
444 | * @blank_mode == 2 means suspend vsync, | |
445 | * @blank_mode == 3 means suspend hsync, | |
446 | * @blank_mode == 4 means powerdown. | |
447 | */ | |
448 | ||
449 | static int hgafb_blank(int blank_mode, struct fb_info *info) | |
450 | { | |
451 | hga_blank(blank_mode); | |
452 | return 0; | |
453 | } | |
454 | ||
455 | /* | |
456 | * Accel functions | |
457 | */ | |
458 | #ifdef CONFIG_FB_HGA_ACCEL | |
459 | static void hgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) | |
460 | { | |
461 | u_int rows, y; | |
462 | u8 __iomem *dest; | |
463 | ||
464 | y = rect->dy; | |
465 | ||
466 | for (rows = rect->height; rows--; y++) { | |
467 | dest = rowaddr(info, y) + (rect->dx >> 3); | |
468 | switch (rect->rop) { | |
469 | case ROP_COPY: | |
470 | //fb_memset(dest, rect->color, (rect->width >> 3)); | |
471 | break; | |
472 | case ROP_XOR: | |
473 | fb_writeb(~(fb_readb(dest)), dest); | |
474 | break; | |
475 | } | |
476 | } | |
477 | } | |
478 | ||
479 | static void hgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area) | |
480 | { | |
481 | u_int rows, y1, y2; | |
482 | u8 __iomem *src; | |
483 | u8 __iomem *dest; | |
484 | ||
485 | if (area->dy <= area->sy) { | |
486 | y1 = area->sy; | |
487 | y2 = area->dy; | |
488 | ||
489 | for (rows = area->height; rows--; ) { | |
490 | src = rowaddr(info, y1) + (area->sx >> 3); | |
491 | dest = rowaddr(info, y2) + (area->dx >> 3); | |
492 | //fb_memmove(dest, src, (area->width >> 3)); | |
493 | y1++; | |
494 | y2++; | |
495 | } | |
496 | } else { | |
497 | y1 = area->sy + area->height - 1; | |
498 | y2 = area->dy + area->height - 1; | |
499 | ||
500 | for (rows = area->height; rows--;) { | |
501 | src = rowaddr(info, y1) + (area->sx >> 3); | |
502 | dest = rowaddr(info, y2) + (area->dx >> 3); | |
503 | //fb_memmove(dest, src, (area->width >> 3)); | |
504 | y1--; | |
505 | y2--; | |
506 | } | |
507 | } | |
508 | } | |
509 | ||
510 | static void hgafb_imageblit(struct fb_info *info, const struct fb_image *image) | |
511 | { | |
512 | u8 __iomem *dest; | |
513 | u8 *cdat = (u8 *) image->data; | |
514 | u_int rows, y = image->dy; | |
515 | u8 d; | |
516 | ||
517 | for (rows = image->height; rows--; y++) { | |
518 | d = *cdat++; | |
519 | dest = rowaddr(info, y) + (image->dx >> 3); | |
520 | fb_writeb(d, dest); | |
521 | } | |
522 | } | |
523 | #else /* !CONFIG_FB_HGA_ACCEL */ | |
524 | #define hgafb_fillrect cfb_fillrect | |
525 | #define hgafb_copyarea cfb_copyarea | |
526 | #define hgafb_imageblit cfb_imageblit | |
527 | #endif /* CONFIG_FB_HGA_ACCEL */ | |
528 | ||
529 | ||
530 | static struct fb_ops hgafb_ops = { | |
531 | .owner = THIS_MODULE, | |
532 | .fb_open = hgafb_open, | |
533 | .fb_release = hgafb_release, | |
534 | .fb_setcolreg = hgafb_setcolreg, | |
535 | .fb_pan_display = hgafb_pan_display, | |
536 | .fb_blank = hgafb_blank, | |
537 | .fb_fillrect = hgafb_fillrect, | |
538 | .fb_copyarea = hgafb_copyarea, | |
539 | .fb_imageblit = hgafb_imageblit, | |
540 | }; | |
541 | ||
542 | /* ------------------------------------------------------------------------- * | |
543 | * | |
544 | * Functions in fb_info | |
545 | * | |
546 | * ------------------------------------------------------------------------- */ | |
547 | ||
548 | /* ------------------------------------------------------------------------- */ | |
549 | ||
550 | /* | |
551 | * Initialization | |
552 | */ | |
553 | ||
2870086e | 554 | static int __init hgafb_probe(struct platform_device *pdev) |
1da177e4 | 555 | { |
1d204ef3 | 556 | struct fb_info *info; |
1da177e4 LT |
557 | |
558 | if (! hga_card_detect()) { | |
559 | printk(KERN_INFO "hgafb: HGA card not detected.\n"); | |
560 | if (hga_vram) | |
561 | iounmap(hga_vram); | |
562 | return -EINVAL; | |
563 | } | |
564 | ||
565 | printk(KERN_INFO "hgafb: %s with %ldK of memory detected.\n", | |
566 | hga_type_name, hga_vram_len/1024); | |
567 | ||
2870086e | 568 | info = framebuffer_alloc(0, &pdev->dev); |
1d204ef3 AD |
569 | if (!info) { |
570 | iounmap(hga_vram); | |
571 | return -ENOMEM; | |
572 | } | |
573 | ||
1da177e4 LT |
574 | hga_fix.smem_start = (unsigned long)hga_vram; |
575 | hga_fix.smem_len = hga_vram_len; | |
576 | ||
1d204ef3 AD |
577 | info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; |
578 | info->var = hga_default_var; | |
579 | info->fix = hga_fix; | |
580 | info->monspecs.hfmin = 0; | |
581 | info->monspecs.hfmax = 0; | |
582 | info->monspecs.vfmin = 10000; | |
583 | info->monspecs.vfmax = 10000; | |
584 | info->monspecs.dpms = 0; | |
585 | info->fbops = &hgafb_ops; | |
586 | info->screen_base = hga_vram; | |
587 | ||
588 | if (register_framebuffer(info) < 0) { | |
589 | framebuffer_release(info); | |
1da177e4 LT |
590 | iounmap(hga_vram); |
591 | return -EINVAL; | |
592 | } | |
593 | ||
594 | printk(KERN_INFO "fb%d: %s frame buffer device\n", | |
1d204ef3 | 595 | info->node, info->fix.id); |
2870086e | 596 | platform_set_drvdata(pdev, info); |
1da177e4 LT |
597 | return 0; |
598 | } | |
599 | ||
2870086e | 600 | static int hgafb_remove(struct platform_device *pdev) |
1da177e4 | 601 | { |
2870086e | 602 | struct fb_info *info = platform_get_drvdata(pdev); |
1d204ef3 | 603 | |
1da177e4 LT |
604 | hga_txt_mode(); |
605 | hga_clear_screen(); | |
1d204ef3 AD |
606 | |
607 | if (info) { | |
608 | unregister_framebuffer(info); | |
609 | framebuffer_release(info); | |
610 | } | |
611 | ||
1da177e4 | 612 | iounmap(hga_vram); |
1d204ef3 AD |
613 | |
614 | if (release_io_ports) | |
615 | release_region(0x3b0, 12); | |
616 | ||
617 | if (release_io_port) | |
618 | release_region(0x3bf, 1); | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
2870086e | 623 | static struct platform_driver hgafb_driver = { |
1d204ef3 AD |
624 | .probe = hgafb_probe, |
625 | .remove = hgafb_remove, | |
2870086e KH |
626 | .driver = { |
627 | .name = "hgafb", | |
628 | }, | |
1d204ef3 AD |
629 | }; |
630 | ||
2870086e | 631 | static struct platform_device *hgafb_device; |
1d204ef3 AD |
632 | |
633 | static int __init hgafb_init(void) | |
634 | { | |
635 | int ret; | |
636 | ||
637 | if (fb_get_options("hgafb", NULL)) | |
638 | return -ENODEV; | |
639 | ||
2870086e | 640 | ret = platform_driver_register(&hgafb_driver); |
1d204ef3 AD |
641 | |
642 | if (!ret) { | |
2870086e KH |
643 | hgafb_device = platform_device_register_simple("hgafb", 0, NULL, 0); |
644 | ||
645 | if (IS_ERR(hgafb_device)) { | |
646 | platform_driver_unregister(&hgafb_driver); | |
647 | ret = PTR_ERR(hgafb_device); | |
648 | } | |
1d204ef3 AD |
649 | } |
650 | ||
651 | return ret; | |
652 | } | |
653 | ||
654 | static void __exit hgafb_exit(void) | |
655 | { | |
2870086e KH |
656 | platform_device_unregister(hgafb_device); |
657 | platform_driver_unregister(&hgafb_driver); | |
1da177e4 | 658 | } |
1da177e4 LT |
659 | |
660 | /* ------------------------------------------------------------------------- | |
661 | * | |
662 | * Modularization | |
663 | * | |
664 | * ------------------------------------------------------------------------- */ | |
665 | ||
666 | MODULE_AUTHOR("Ferenc Bakonyi (fero@drama.obuda.kando.hu)"); | |
667 | MODULE_DESCRIPTION("FBDev driver for Hercules Graphics Adaptor"); | |
668 | MODULE_LICENSE("GPL"); | |
669 | ||
670 | module_param(nologo, bool, 0); | |
671 | MODULE_PARM_DESC(nologo, "Disables startup logo if != 0 (default=0)"); | |
672 | module_init(hgafb_init); | |
1da177e4 | 673 | module_exit(hgafb_exit); |