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1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/pmag-aa-fb.c | |
3 | * Copyright 2002 Karsten Merker <merker@debian.org> | |
4 | * | |
5 | * PMAG-AA TurboChannel framebuffer card support ... derived from | |
6 | * pmag-ba-fb.c, which is Copyright (C) 1999, 2000, 2001 by | |
7 | * Michael Engel <engel@unix-ag.org>, Karsten Merker <merker@debian.org> | |
8 | * and Harald Koerfgen <hkoerfg@web.de>, which itself is derived from | |
9 | * "HP300 Topcat framebuffer support (derived from macfb of all things) | |
10 | * Phil Blundell <philb@gnu.org> 1998" | |
11 | * | |
12 | * This file is subject to the terms and conditions of the GNU General | |
13 | * Public License. See the file COPYING in the main directory of this | |
14 | * archive for more details. | |
15 | * | |
16 | * 2002-09-28 Karsten Merker <merker@linuxtag.org> | |
17 | * Version 0.01: First try to get a PMAG-AA running. | |
18 | * | |
19 | * 2003-02-24 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de> | |
20 | * Version 0.02: Major code cleanup. | |
21 | * | |
22 | * 2003-09-21 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de> | |
23 | * Hardware cursor support. | |
24 | */ | |
25 | #include <linux/module.h> | |
26 | #include <linux/kernel.h> | |
1da177e4 LT |
27 | #include <linux/errno.h> |
28 | #include <linux/string.h> | |
29 | #include <linux/timer.h> | |
30 | #include <linux/mm.h> | |
1da177e4 LT |
31 | #include <linux/delay.h> |
32 | #include <linux/init.h> | |
33 | #include <linux/fb.h> | |
34 | #include <linux/console.h> | |
35 | ||
36 | #include <asm/bootinfo.h> | |
37 | #include <asm/dec/machtype.h> | |
38 | #include <asm/dec/tc.h> | |
39 | ||
40 | #include <video/fbcon.h> | |
41 | #include <video/fbcon-cfb8.h> | |
42 | ||
43 | #include "bt455.h" | |
44 | #include "bt431.h" | |
45 | ||
46 | /* Version information */ | |
47 | #define DRIVER_VERSION "0.02" | |
48 | #define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>" | |
49 | #define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver" | |
50 | ||
51 | /* Prototypes */ | |
52 | static int aafb_set_var(struct fb_var_screeninfo *var, int con, | |
53 | struct fb_info *info); | |
54 | ||
55 | /* | |
56 | * Bt455 RAM DAC register base offset (rel. to TC slot base address). | |
57 | */ | |
58 | #define PMAG_AA_BT455_OFFSET 0x100000 | |
59 | ||
60 | /* | |
61 | * Bt431 cursor generator offset (rel. to TC slot base address). | |
62 | */ | |
63 | #define PMAG_AA_BT431_OFFSET 0x180000 | |
64 | ||
65 | /* | |
66 | * Begin of PMAG-AA framebuffer memory relative to TC slot address, | |
67 | * resolution is 1280x1024x1 (8 bits deep, but only LSB is used). | |
68 | */ | |
69 | #define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x200000 | |
70 | ||
71 | struct aafb_cursor { | |
72 | struct timer_list timer; | |
73 | int enable; | |
74 | int on; | |
75 | int vbl_cnt; | |
76 | int blink_rate; | |
77 | u16 x, y, width, height; | |
78 | }; | |
79 | ||
80 | #define CURSOR_TIMER_FREQ (HZ / 50) | |
81 | #define CURSOR_BLINK_RATE (20) | |
82 | #define CURSOR_DRAW_DELAY (2) | |
83 | ||
84 | struct aafb_info { | |
85 | struct fb_info info; | |
86 | struct display disp; | |
87 | struct aafb_cursor cursor; | |
88 | struct bt455_regs *bt455; | |
89 | struct bt431_regs *bt431; | |
90 | unsigned long fb_start; | |
91 | unsigned long fb_size; | |
92 | unsigned long fb_line_length; | |
93 | }; | |
94 | ||
95 | /* | |
96 | * Max 3 TURBOchannel slots -> max 3 PMAG-AA. | |
97 | */ | |
98 | static struct aafb_info my_fb_info[3]; | |
99 | ||
100 | static struct aafb_par { | |
101 | } current_par; | |
102 | ||
103 | static int currcon = -1; | |
104 | ||
105 | static void aafb_set_cursor(struct aafb_info *info, int on) | |
106 | { | |
107 | struct aafb_cursor *c = &info->cursor; | |
108 | ||
109 | if (on) { | |
110 | bt431_position_cursor(info->bt431, c->x, c->y); | |
111 | bt431_enable_cursor(info->bt431); | |
112 | } else | |
113 | bt431_erase_cursor(info->bt431); | |
114 | } | |
115 | ||
116 | static void aafbcon_cursor(struct display *disp, int mode, int x, int y) | |
117 | { | |
118 | struct aafb_info *info = (struct aafb_info *)disp->fb_info; | |
119 | struct aafb_cursor *c = &info->cursor; | |
120 | ||
121 | x *= fontwidth(disp); | |
122 | y *= fontheight(disp); | |
123 | ||
124 | if (c->x == x && c->y == y && (mode == CM_ERASE) == !c->enable) | |
125 | return; | |
126 | ||
127 | c->enable = 0; | |
128 | if (c->on) | |
129 | aafb_set_cursor(info, 0); | |
130 | c->x = x - disp->var.xoffset; | |
131 | c->y = y - disp->var.yoffset; | |
132 | ||
133 | switch (mode) { | |
134 | case CM_ERASE: | |
135 | c->on = 0; | |
136 | break; | |
137 | case CM_DRAW: | |
138 | case CM_MOVE: | |
139 | if (c->on) | |
140 | aafb_set_cursor(info, c->on); | |
141 | else | |
142 | c->vbl_cnt = CURSOR_DRAW_DELAY; | |
143 | c->enable = 1; | |
144 | break; | |
145 | } | |
146 | } | |
147 | ||
148 | static int aafbcon_set_font(struct display *disp, int width, int height) | |
149 | { | |
150 | struct aafb_info *info = (struct aafb_info *)disp->fb_info; | |
151 | struct aafb_cursor *c = &info->cursor; | |
91c43132 | 152 | u8 fgc = ~attr_bgcol_ec(disp, disp->conp, &info->info); |
1da177e4 LT |
153 | |
154 | if (width > 64 || height > 64 || width < 0 || height < 0) | |
155 | return -EINVAL; | |
156 | ||
157 | c->height = height; | |
158 | c->width = width; | |
159 | ||
160 | bt431_set_font(info->bt431, fgc, width, height); | |
161 | ||
162 | return 1; | |
163 | } | |
164 | ||
165 | static void aafb_cursor_timer_handler(unsigned long data) | |
166 | { | |
167 | struct aafb_info *info = (struct aafb_info *)data; | |
168 | struct aafb_cursor *c = &info->cursor; | |
169 | ||
170 | if (!c->enable) | |
171 | goto out; | |
172 | ||
173 | if (c->vbl_cnt && --c->vbl_cnt == 0) { | |
174 | c->on ^= 1; | |
175 | aafb_set_cursor(info, c->on); | |
176 | c->vbl_cnt = c->blink_rate; | |
177 | } | |
178 | ||
179 | out: | |
180 | c->timer.expires = jiffies + CURSOR_TIMER_FREQ; | |
181 | add_timer(&c->timer); | |
182 | } | |
183 | ||
184 | static void __init aafb_cursor_init(struct aafb_info *info) | |
185 | { | |
186 | struct aafb_cursor *c = &info->cursor; | |
187 | ||
188 | c->enable = 1; | |
189 | c->on = 1; | |
190 | c->x = c->y = 0; | |
191 | c->width = c->height = 0; | |
192 | c->vbl_cnt = CURSOR_DRAW_DELAY; | |
193 | c->blink_rate = CURSOR_BLINK_RATE; | |
194 | ||
195 | init_timer(&c->timer); | |
196 | c->timer.data = (unsigned long)info; | |
197 | c->timer.function = aafb_cursor_timer_handler; | |
198 | mod_timer(&c->timer, jiffies + CURSOR_TIMER_FREQ); | |
199 | } | |
200 | ||
201 | static void __exit aafb_cursor_exit(struct aafb_info *info) | |
202 | { | |
203 | struct aafb_cursor *c = &info->cursor; | |
204 | ||
205 | del_timer_sync(&c->timer); | |
206 | } | |
207 | ||
208 | static struct display_switch aafb_switch8 = { | |
209 | .setup = fbcon_cfb8_setup, | |
210 | .bmove = fbcon_cfb8_bmove, | |
211 | .clear = fbcon_cfb8_clear, | |
212 | .putc = fbcon_cfb8_putc, | |
213 | .putcs = fbcon_cfb8_putcs, | |
214 | .revc = fbcon_cfb8_revc, | |
215 | .cursor = aafbcon_cursor, | |
216 | .set_font = aafbcon_set_font, | |
217 | .clear_margins = fbcon_cfb8_clear_margins, | |
218 | .fontwidthmask = FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16) | |
219 | }; | |
220 | ||
221 | static void aafb_get_par(struct aafb_par *par) | |
222 | { | |
223 | *par = current_par; | |
224 | } | |
225 | ||
226 | static int aafb_get_fix(struct fb_fix_screeninfo *fix, int con, | |
227 | struct fb_info *info) | |
228 | { | |
229 | struct aafb_info *ip = (struct aafb_info *)info; | |
230 | ||
231 | memset(fix, 0, sizeof(struct fb_fix_screeninfo)); | |
232 | strcpy(fix->id, "PMAG-AA"); | |
233 | fix->smem_start = ip->fb_start; | |
234 | fix->smem_len = ip->fb_size; | |
235 | fix->type = FB_TYPE_PACKED_PIXELS; | |
236 | fix->ypanstep = 1; | |
237 | fix->ywrapstep = 1; | |
238 | fix->visual = FB_VISUAL_MONO10; | |
239 | fix->line_length = 1280; | |
240 | fix->accel = FB_ACCEL_NONE; | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static void aafb_set_disp(struct display *disp, int con, | |
246 | struct aafb_info *info) | |
247 | { | |
248 | struct fb_fix_screeninfo fix; | |
249 | ||
250 | disp->fb_info = &info->info; | |
251 | aafb_set_var(&disp->var, con, &info->info); | |
252 | if (disp->conp && disp->conp->vc_sw && disp->conp->vc_sw->con_cursor) | |
253 | disp->conp->vc_sw->con_cursor(disp->conp, CM_ERASE); | |
254 | disp->dispsw = &aafb_switch8; | |
255 | disp->dispsw_data = 0; | |
256 | ||
257 | aafb_get_fix(&fix, con, &info->info); | |
258 | disp->screen_base = (u8 *) fix.smem_start; | |
259 | disp->visual = fix.visual; | |
260 | disp->type = fix.type; | |
261 | disp->type_aux = fix.type_aux; | |
262 | disp->ypanstep = fix.ypanstep; | |
263 | disp->ywrapstep = fix.ywrapstep; | |
264 | disp->line_length = fix.line_length; | |
265 | disp->next_line = 2048; | |
266 | disp->can_soft_blank = 1; | |
267 | disp->inverse = 0; | |
268 | disp->scrollmode = SCROLL_YREDRAW; | |
269 | ||
270 | aafbcon_set_font(disp, fontwidth(disp), fontheight(disp)); | |
271 | } | |
272 | ||
273 | static int aafb_get_cmap(struct fb_cmap *cmap, int kspc, int con, | |
274 | struct fb_info *info) | |
275 | { | |
276 | static u16 color[2] = {0x0000, 0x000f}; | |
277 | static struct fb_cmap aafb_cmap = {0, 2, color, color, color, NULL}; | |
278 | ||
279 | fb_copy_cmap(&aafb_cmap, cmap, kspc ? 0 : 2); | |
280 | return 0; | |
281 | } | |
282 | ||
283 | static int aafb_set_cmap(struct fb_cmap *cmap, int kspc, int con, | |
284 | struct fb_info *info) | |
285 | { | |
286 | u16 color[2] = {0x0000, 0x000f}; | |
287 | ||
288 | if (cmap->start == 0 | |
289 | && cmap->len == 2 | |
290 | && memcmp(cmap->red, color, sizeof(color)) == 0 | |
291 | && memcmp(cmap->green, color, sizeof(color)) == 0 | |
292 | && memcmp(cmap->blue, color, sizeof(color)) == 0 | |
293 | && cmap->transp == NULL) | |
294 | return 0; | |
295 | else | |
296 | return -EINVAL; | |
297 | } | |
298 | ||
67a6680d | 299 | static int aafb_ioctl(struct fb_info *info, u32 cmd, unsigned long arg) |
1da177e4 LT |
300 | { |
301 | /* TODO: Not yet implemented */ | |
302 | return -ENOIOCTLCMD; | |
303 | } | |
304 | ||
305 | static int aafb_switch(int con, struct fb_info *info) | |
306 | { | |
307 | struct aafb_info *ip = (struct aafb_info *)info; | |
308 | struct display *old = (currcon < 0) ? &ip->disp : (fb_display + currcon); | |
309 | struct display *new = (con < 0) ? &ip->disp : (fb_display + con); | |
310 | ||
311 | if (old->conp && old->conp->vc_sw && old->conp->vc_sw->con_cursor) | |
312 | old->conp->vc_sw->con_cursor(old->conp, CM_ERASE); | |
313 | ||
314 | /* Set the current console. */ | |
315 | currcon = con; | |
316 | aafb_set_disp(new, con, ip); | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
321 | static void aafb_encode_var(struct fb_var_screeninfo *var, | |
322 | struct aafb_par *par) | |
323 | { | |
324 | var->xres = 1280; | |
325 | var->yres = 1024; | |
326 | var->xres_virtual = 2048; | |
327 | var->yres_virtual = 1024; | |
328 | var->xoffset = 0; | |
329 | var->yoffset = 0; | |
330 | var->bits_per_pixel = 8; | |
331 | var->grayscale = 1; | |
332 | var->red.offset = 0; | |
333 | var->red.length = 0; | |
334 | var->red.msb_right = 0; | |
335 | var->green.offset = 0; | |
336 | var->green.length = 1; | |
337 | var->green.msb_right = 0; | |
338 | var->blue.offset = 0; | |
339 | var->blue.length = 0; | |
340 | var->blue.msb_right = 0; | |
341 | var->transp.offset = 0; | |
342 | var->transp.length = 0; | |
343 | var->transp.msb_right = 0; | |
344 | var->nonstd = 0; | |
345 | var->activate &= ~FB_ACTIVATE_MASK & FB_ACTIVATE_NOW; | |
346 | var->accel_flags = 0; | |
347 | var->sync = FB_SYNC_ON_GREEN; | |
348 | var->vmode &= ~FB_VMODE_MASK & FB_VMODE_NONINTERLACED; | |
349 | } | |
350 | ||
351 | static int aafb_get_var(struct fb_var_screeninfo *var, int con, | |
352 | struct fb_info *info) | |
353 | { | |
354 | if (con < 0) { | |
355 | struct aafb_par par; | |
356 | ||
357 | memset(var, 0, sizeof(struct fb_var_screeninfo)); | |
358 | aafb_get_par(&par); | |
359 | aafb_encode_var(var, &par); | |
360 | } else | |
361 | *var = info->var; | |
362 | ||
363 | return 0; | |
364 | } | |
365 | ||
366 | static int aafb_set_var(struct fb_var_screeninfo *var, int con, | |
367 | struct fb_info *info) | |
368 | { | |
369 | struct aafb_par par; | |
370 | ||
371 | aafb_get_par(&par); | |
372 | aafb_encode_var(var, &par); | |
373 | info->var = *var; | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
378 | static int aafb_update_var(int con, struct fb_info *info) | |
379 | { | |
380 | struct aafb_info *ip = (struct aafb_info *)info; | |
381 | struct display *disp = (con < 0) ? &ip->disp : (fb_display + con); | |
382 | ||
383 | if (con == currcon) | |
384 | aafbcon_cursor(disp, CM_ERASE, ip->cursor.x, ip->cursor.y); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | /* 0 unblanks, any other blanks. */ | |
390 | ||
391 | static void aafb_blank(int blank, struct fb_info *info) | |
392 | { | |
393 | struct aafb_info *ip = (struct aafb_info *)info; | |
394 | u8 val = blank ? 0x00 : 0x0f; | |
395 | ||
396 | bt455_write_cmap_entry(ip->bt455, 1, val, val, val); | |
397 | aafbcon_cursor(&ip->disp, CM_ERASE, ip->cursor.x, ip->cursor.y); | |
398 | } | |
399 | ||
400 | static struct fb_ops aafb_ops = { | |
401 | .owner = THIS_MODULE, | |
402 | .fb_get_fix = aafb_get_fix, | |
403 | .fb_get_var = aafb_get_var, | |
404 | .fb_set_var = aafb_set_var, | |
405 | .fb_get_cmap = aafb_get_cmap, | |
406 | .fb_set_cmap = aafb_set_cmap, | |
407 | .fb_ioctl = aafb_ioctl | |
408 | }; | |
409 | ||
410 | static int __init init_one(int slot) | |
411 | { | |
61838ffe | 412 | unsigned long base_addr = CKSEG1ADDR(get_tc_base_addr(slot)); |
1da177e4 LT |
413 | struct aafb_info *ip = &my_fb_info[slot]; |
414 | ||
415 | memset(ip, 0, sizeof(struct aafb_info)); | |
416 | ||
417 | /* | |
418 | * Framebuffer display memory base address and friends. | |
419 | */ | |
420 | ip->bt455 = (struct bt455_regs *) (base_addr + PMAG_AA_BT455_OFFSET); | |
421 | ip->bt431 = (struct bt431_regs *) (base_addr + PMAG_AA_BT431_OFFSET); | |
422 | ip->fb_start = base_addr + PMAG_AA_ONBOARD_FBMEM_OFFSET; | |
423 | ip->fb_size = 2048 * 1024; /* fb_fix_screeninfo.smem_length | |
424 | seems to be physical */ | |
425 | ip->fb_line_length = 2048; | |
426 | ||
427 | /* | |
428 | * Let there be consoles.. | |
429 | */ | |
430 | strcpy(ip->info.modename, "PMAG-AA"); | |
431 | ip->info.node = -1; | |
432 | ip->info.flags = FBINFO_FLAG_DEFAULT; | |
433 | ip->info.fbops = &aafb_ops; | |
434 | ip->info.disp = &ip->disp; | |
435 | ip->info.changevar = NULL; | |
436 | ip->info.switch_con = &aafb_switch; | |
437 | ip->info.updatevar = &aafb_update_var; | |
438 | ip->info.blank = &aafb_blank; | |
439 | ||
440 | aafb_set_disp(&ip->disp, currcon, ip); | |
441 | ||
442 | /* | |
443 | * Configure the RAM DACs. | |
444 | */ | |
445 | bt455_erase_cursor(ip->bt455); | |
446 | ||
447 | /* Init colormap. */ | |
448 | bt455_write_cmap_entry(ip->bt455, 0, 0x00, 0x00, 0x00); | |
449 | bt455_write_cmap_entry(ip->bt455, 1, 0x0f, 0x0f, 0x0f); | |
450 | ||
451 | /* Init hardware cursor. */ | |
452 | bt431_init_cursor(ip->bt431); | |
453 | aafb_cursor_init(ip); | |
454 | ||
455 | /* Clear the screen. */ | |
456 | memset ((void *)ip->fb_start, 0, ip->fb_size); | |
457 | ||
458 | if (register_framebuffer(&ip->info) < 0) | |
459 | return -EINVAL; | |
460 | ||
461 | printk(KERN_INFO "fb%d: %s frame buffer in TC slot %d\n", | |
462 | GET_FB_IDX(ip->info.node), ip->info.modename, slot); | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | static int __exit exit_one(int slot) | |
468 | { | |
469 | struct aafb_info *ip = &my_fb_info[slot]; | |
470 | ||
471 | if (unregister_framebuffer(&ip->info) < 0) | |
472 | return -EINVAL; | |
473 | ||
474 | return 0; | |
475 | } | |
476 | ||
477 | /* | |
478 | * Initialise the framebuffer. | |
479 | */ | |
480 | int __init pmagaafb_init(void) | |
481 | { | |
482 | int sid; | |
483 | int found = 0; | |
484 | ||
485 | while ((sid = search_tc_card("PMAG-AA")) >= 0) { | |
486 | found = 1; | |
487 | claim_tc_card(sid); | |
488 | init_one(sid); | |
489 | } | |
490 | ||
491 | return found ? 0 : -ENXIO; | |
492 | } | |
493 | ||
494 | static void __exit pmagaafb_exit(void) | |
495 | { | |
496 | int sid; | |
497 | ||
498 | while ((sid = search_tc_card("PMAG-AA")) >= 0) { | |
499 | exit_one(sid); | |
500 | release_tc_card(sid); | |
501 | } | |
502 | } | |
503 | ||
504 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
505 | MODULE_DESCRIPTION(DRIVER_DESCRIPTION); | |
506 | MODULE_LICENSE("GPL"); | |
507 | #ifdef MODULE | |
508 | module_init(pmagaafb_init); | |
509 | module_exit(pmagaafb_exit); | |
510 | #endif |