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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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/sched.h>
28#include <linux/errno.h>
29#include <linux/string.h>
30#include <linux/timer.h>
31#include <linux/mm.h>
32#include <linux/tty.h>
33#include <linux/slab.h>
34#include <linux/delay.h>
35#include <linux/init.h>
36#include <linux/fb.h>
37#include <linux/console.h>
38
39#include <asm/bootinfo.h>
40#include <asm/dec/machtype.h>
41#include <asm/dec/tc.h>
42
43#include <video/fbcon.h>
44#include <video/fbcon-cfb8.h>
45
46#include "bt455.h"
47#include "bt431.h"
48
49/* Version information */
50#define DRIVER_VERSION "0.02"
51#define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>"
52#define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver"
53
54/* Prototypes */
55static int aafb_set_var(struct fb_var_screeninfo *var, int con,
56 struct fb_info *info);
57
58/*
59 * Bt455 RAM DAC register base offset (rel. to TC slot base address).
60 */
61#define PMAG_AA_BT455_OFFSET 0x100000
62
63/*
64 * Bt431 cursor generator offset (rel. to TC slot base address).
65 */
66#define PMAG_AA_BT431_OFFSET 0x180000
67
68/*
69 * Begin of PMAG-AA framebuffer memory relative to TC slot address,
70 * resolution is 1280x1024x1 (8 bits deep, but only LSB is used).
71 */
72#define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x200000
73
74struct aafb_cursor {
75 struct timer_list timer;
76 int enable;
77 int on;
78 int vbl_cnt;
79 int blink_rate;
80 u16 x, y, width, height;
81};
82
83#define CURSOR_TIMER_FREQ (HZ / 50)
84#define CURSOR_BLINK_RATE (20)
85#define CURSOR_DRAW_DELAY (2)
86
87struct aafb_info {
88 struct fb_info info;
89 struct display disp;
90 struct aafb_cursor cursor;
91 struct bt455_regs *bt455;
92 struct bt431_regs *bt431;
93 unsigned long fb_start;
94 unsigned long fb_size;
95 unsigned long fb_line_length;
96};
97
98/*
99 * Max 3 TURBOchannel slots -> max 3 PMAG-AA.
100 */
101static struct aafb_info my_fb_info[3];
102
103static struct aafb_par {
104} current_par;
105
106static int currcon = -1;
107
108static void aafb_set_cursor(struct aafb_info *info, int on)
109{
110 struct aafb_cursor *c = &info->cursor;
111
112 if (on) {
113 bt431_position_cursor(info->bt431, c->x, c->y);
114 bt431_enable_cursor(info->bt431);
115 } else
116 bt431_erase_cursor(info->bt431);
117}
118
119static void aafbcon_cursor(struct display *disp, int mode, int x, int y)
120{
121 struct aafb_info *info = (struct aafb_info *)disp->fb_info;
122 struct aafb_cursor *c = &info->cursor;
123
124 x *= fontwidth(disp);
125 y *= fontheight(disp);
126
127 if (c->x == x && c->y == y && (mode == CM_ERASE) == !c->enable)
128 return;
129
130 c->enable = 0;
131 if (c->on)
132 aafb_set_cursor(info, 0);
133 c->x = x - disp->var.xoffset;
134 c->y = y - disp->var.yoffset;
135
136 switch (mode) {
137 case CM_ERASE:
138 c->on = 0;
139 break;
140 case CM_DRAW:
141 case CM_MOVE:
142 if (c->on)
143 aafb_set_cursor(info, c->on);
144 else
145 c->vbl_cnt = CURSOR_DRAW_DELAY;
146 c->enable = 1;
147 break;
148 }
149}
150
151static int aafbcon_set_font(struct display *disp, int width, int height)
152{
153 struct aafb_info *info = (struct aafb_info *)disp->fb_info;
154 struct aafb_cursor *c = &info->cursor;
155 u8 fgc = ~attr_bgcol_ec(disp, disp->conp);
156
157 if (width > 64 || height > 64 || width < 0 || height < 0)
158 return -EINVAL;
159
160 c->height = height;
161 c->width = width;
162
163 bt431_set_font(info->bt431, fgc, width, height);
164
165 return 1;
166}
167
168static void aafb_cursor_timer_handler(unsigned long data)
169{
170 struct aafb_info *info = (struct aafb_info *)data;
171 struct aafb_cursor *c = &info->cursor;
172
173 if (!c->enable)
174 goto out;
175
176 if (c->vbl_cnt && --c->vbl_cnt == 0) {
177 c->on ^= 1;
178 aafb_set_cursor(info, c->on);
179 c->vbl_cnt = c->blink_rate;
180 }
181
182out:
183 c->timer.expires = jiffies + CURSOR_TIMER_FREQ;
184 add_timer(&c->timer);
185}
186
187static void __init aafb_cursor_init(struct aafb_info *info)
188{
189 struct aafb_cursor *c = &info->cursor;
190
191 c->enable = 1;
192 c->on = 1;
193 c->x = c->y = 0;
194 c->width = c->height = 0;
195 c->vbl_cnt = CURSOR_DRAW_DELAY;
196 c->blink_rate = CURSOR_BLINK_RATE;
197
198 init_timer(&c->timer);
199 c->timer.data = (unsigned long)info;
200 c->timer.function = aafb_cursor_timer_handler;
201 mod_timer(&c->timer, jiffies + CURSOR_TIMER_FREQ);
202}
203
204static void __exit aafb_cursor_exit(struct aafb_info *info)
205{
206 struct aafb_cursor *c = &info->cursor;
207
208 del_timer_sync(&c->timer);
209}
210
211static struct display_switch aafb_switch8 = {
212 .setup = fbcon_cfb8_setup,
213 .bmove = fbcon_cfb8_bmove,
214 .clear = fbcon_cfb8_clear,
215 .putc = fbcon_cfb8_putc,
216 .putcs = fbcon_cfb8_putcs,
217 .revc = fbcon_cfb8_revc,
218 .cursor = aafbcon_cursor,
219 .set_font = aafbcon_set_font,
220 .clear_margins = fbcon_cfb8_clear_margins,
221 .fontwidthmask = FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16)
222};
223
224static void aafb_get_par(struct aafb_par *par)
225{
226 *par = current_par;
227}
228
229static int aafb_get_fix(struct fb_fix_screeninfo *fix, int con,
230 struct fb_info *info)
231{
232 struct aafb_info *ip = (struct aafb_info *)info;
233
234 memset(fix, 0, sizeof(struct fb_fix_screeninfo));
235 strcpy(fix->id, "PMAG-AA");
236 fix->smem_start = ip->fb_start;
237 fix->smem_len = ip->fb_size;
238 fix->type = FB_TYPE_PACKED_PIXELS;
239 fix->ypanstep = 1;
240 fix->ywrapstep = 1;
241 fix->visual = FB_VISUAL_MONO10;
242 fix->line_length = 1280;
243 fix->accel = FB_ACCEL_NONE;
244
245 return 0;
246}
247
248static void aafb_set_disp(struct display *disp, int con,
249 struct aafb_info *info)
250{
251 struct fb_fix_screeninfo fix;
252
253 disp->fb_info = &info->info;
254 aafb_set_var(&disp->var, con, &info->info);
255 if (disp->conp && disp->conp->vc_sw && disp->conp->vc_sw->con_cursor)
256 disp->conp->vc_sw->con_cursor(disp->conp, CM_ERASE);
257 disp->dispsw = &aafb_switch8;
258 disp->dispsw_data = 0;
259
260 aafb_get_fix(&fix, con, &info->info);
261 disp->screen_base = (u8 *) fix.smem_start;
262 disp->visual = fix.visual;
263 disp->type = fix.type;
264 disp->type_aux = fix.type_aux;
265 disp->ypanstep = fix.ypanstep;
266 disp->ywrapstep = fix.ywrapstep;
267 disp->line_length = fix.line_length;
268 disp->next_line = 2048;
269 disp->can_soft_blank = 1;
270 disp->inverse = 0;
271 disp->scrollmode = SCROLL_YREDRAW;
272
273 aafbcon_set_font(disp, fontwidth(disp), fontheight(disp));
274}
275
276static int aafb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
277 struct fb_info *info)
278{
279 static u16 color[2] = {0x0000, 0x000f};
280 static struct fb_cmap aafb_cmap = {0, 2, color, color, color, NULL};
281
282 fb_copy_cmap(&aafb_cmap, cmap, kspc ? 0 : 2);
283 return 0;
284}
285
286static int aafb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
287 struct fb_info *info)
288{
289 u16 color[2] = {0x0000, 0x000f};
290
291 if (cmap->start == 0
292 && cmap->len == 2
293 && memcmp(cmap->red, color, sizeof(color)) == 0
294 && memcmp(cmap->green, color, sizeof(color)) == 0
295 && memcmp(cmap->blue, color, sizeof(color)) == 0
296 && cmap->transp == NULL)
297 return 0;
298 else
299 return -EINVAL;
300}
301
Christoph Hellwig67a66802006-01-14 13:21:25 -0800302static int aafb_ioctl(struct fb_info *info, u32 cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303{
304 /* TODO: Not yet implemented */
305 return -ENOIOCTLCMD;
306}
307
308static int aafb_switch(int con, struct fb_info *info)
309{
310 struct aafb_info *ip = (struct aafb_info *)info;
311 struct display *old = (currcon < 0) ? &ip->disp : (fb_display + currcon);
312 struct display *new = (con < 0) ? &ip->disp : (fb_display + con);
313
314 if (old->conp && old->conp->vc_sw && old->conp->vc_sw->con_cursor)
315 old->conp->vc_sw->con_cursor(old->conp, CM_ERASE);
316
317 /* Set the current console. */
318 currcon = con;
319 aafb_set_disp(new, con, ip);
320
321 return 0;
322}
323
324static void aafb_encode_var(struct fb_var_screeninfo *var,
325 struct aafb_par *par)
326{
327 var->xres = 1280;
328 var->yres = 1024;
329 var->xres_virtual = 2048;
330 var->yres_virtual = 1024;
331 var->xoffset = 0;
332 var->yoffset = 0;
333 var->bits_per_pixel = 8;
334 var->grayscale = 1;
335 var->red.offset = 0;
336 var->red.length = 0;
337 var->red.msb_right = 0;
338 var->green.offset = 0;
339 var->green.length = 1;
340 var->green.msb_right = 0;
341 var->blue.offset = 0;
342 var->blue.length = 0;
343 var->blue.msb_right = 0;
344 var->transp.offset = 0;
345 var->transp.length = 0;
346 var->transp.msb_right = 0;
347 var->nonstd = 0;
348 var->activate &= ~FB_ACTIVATE_MASK & FB_ACTIVATE_NOW;
349 var->accel_flags = 0;
350 var->sync = FB_SYNC_ON_GREEN;
351 var->vmode &= ~FB_VMODE_MASK & FB_VMODE_NONINTERLACED;
352}
353
354static int aafb_get_var(struct fb_var_screeninfo *var, int con,
355 struct fb_info *info)
356{
357 if (con < 0) {
358 struct aafb_par par;
359
360 memset(var, 0, sizeof(struct fb_var_screeninfo));
361 aafb_get_par(&par);
362 aafb_encode_var(var, &par);
363 } else
364 *var = info->var;
365
366 return 0;
367}
368
369static int aafb_set_var(struct fb_var_screeninfo *var, int con,
370 struct fb_info *info)
371{
372 struct aafb_par par;
373
374 aafb_get_par(&par);
375 aafb_encode_var(var, &par);
376 info->var = *var;
377
378 return 0;
379}
380
381static int aafb_update_var(int con, struct fb_info *info)
382{
383 struct aafb_info *ip = (struct aafb_info *)info;
384 struct display *disp = (con < 0) ? &ip->disp : (fb_display + con);
385
386 if (con == currcon)
387 aafbcon_cursor(disp, CM_ERASE, ip->cursor.x, ip->cursor.y);
388
389 return 0;
390}
391
392/* 0 unblanks, any other blanks. */
393
394static void aafb_blank(int blank, struct fb_info *info)
395{
396 struct aafb_info *ip = (struct aafb_info *)info;
397 u8 val = blank ? 0x00 : 0x0f;
398
399 bt455_write_cmap_entry(ip->bt455, 1, val, val, val);
400 aafbcon_cursor(&ip->disp, CM_ERASE, ip->cursor.x, ip->cursor.y);
401}
402
403static struct fb_ops aafb_ops = {
404 .owner = THIS_MODULE,
405 .fb_get_fix = aafb_get_fix,
406 .fb_get_var = aafb_get_var,
407 .fb_set_var = aafb_set_var,
408 .fb_get_cmap = aafb_get_cmap,
409 .fb_set_cmap = aafb_set_cmap,
410 .fb_ioctl = aafb_ioctl
411};
412
413static int __init init_one(int slot)
414{
Ralf Baechle61838ff2005-09-03 15:56:09 -0700415 unsigned long base_addr = CKSEG1ADDR(get_tc_base_addr(slot));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 struct aafb_info *ip = &my_fb_info[slot];
417
418 memset(ip, 0, sizeof(struct aafb_info));
419
420 /*
421 * Framebuffer display memory base address and friends.
422 */
423 ip->bt455 = (struct bt455_regs *) (base_addr + PMAG_AA_BT455_OFFSET);
424 ip->bt431 = (struct bt431_regs *) (base_addr + PMAG_AA_BT431_OFFSET);
425 ip->fb_start = base_addr + PMAG_AA_ONBOARD_FBMEM_OFFSET;
426 ip->fb_size = 2048 * 1024; /* fb_fix_screeninfo.smem_length
427 seems to be physical */
428 ip->fb_line_length = 2048;
429
430 /*
431 * Let there be consoles..
432 */
433 strcpy(ip->info.modename, "PMAG-AA");
434 ip->info.node = -1;
435 ip->info.flags = FBINFO_FLAG_DEFAULT;
436 ip->info.fbops = &aafb_ops;
437 ip->info.disp = &ip->disp;
438 ip->info.changevar = NULL;
439 ip->info.switch_con = &aafb_switch;
440 ip->info.updatevar = &aafb_update_var;
441 ip->info.blank = &aafb_blank;
442
443 aafb_set_disp(&ip->disp, currcon, ip);
444
445 /*
446 * Configure the RAM DACs.
447 */
448 bt455_erase_cursor(ip->bt455);
449
450 /* Init colormap. */
451 bt455_write_cmap_entry(ip->bt455, 0, 0x00, 0x00, 0x00);
452 bt455_write_cmap_entry(ip->bt455, 1, 0x0f, 0x0f, 0x0f);
453
454 /* Init hardware cursor. */
455 bt431_init_cursor(ip->bt431);
456 aafb_cursor_init(ip);
457
458 /* Clear the screen. */
459 memset ((void *)ip->fb_start, 0, ip->fb_size);
460
461 if (register_framebuffer(&ip->info) < 0)
462 return -EINVAL;
463
464 printk(KERN_INFO "fb%d: %s frame buffer in TC slot %d\n",
465 GET_FB_IDX(ip->info.node), ip->info.modename, slot);
466
467 return 0;
468}
469
470static int __exit exit_one(int slot)
471{
472 struct aafb_info *ip = &my_fb_info[slot];
473
474 if (unregister_framebuffer(&ip->info) < 0)
475 return -EINVAL;
476
477 return 0;
478}
479
480/*
481 * Initialise the framebuffer.
482 */
483int __init pmagaafb_init(void)
484{
485 int sid;
486 int found = 0;
487
488 while ((sid = search_tc_card("PMAG-AA")) >= 0) {
489 found = 1;
490 claim_tc_card(sid);
491 init_one(sid);
492 }
493
494 return found ? 0 : -ENXIO;
495}
496
497static void __exit pmagaafb_exit(void)
498{
499 int sid;
500
501 while ((sid = search_tc_card("PMAG-AA")) >= 0) {
502 exit_one(sid);
503 release_tc_card(sid);
504 }
505}
506
507MODULE_AUTHOR(DRIVER_AUTHOR);
508MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
509MODULE_LICENSE("GPL");
510#ifdef MODULE
511module_init(pmagaafb_init);
512module_exit(pmagaafb_exit);
513#endif