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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> |
27 | #include <linux/errno.h> |
28 | #include <linux/string.h> |
29 | #include <linux/timer.h> |
30 | #include <linux/mm.h> |
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; |
152 | u8 fgc = ~attr_bgcol_ec(disp, disp->conp, &info->info); |
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 | |
299 | static int aafb_ioctl(struct fb_info *info, u32 cmd, unsigned long arg) |
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 | { |
412 | unsigned long base_addr = CKSEG1ADDR(get_tc_base_addr(slot)); |
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 |
511 |
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