blob: 6515ec11c16ba250f55f6cbe6a10b6a74f7effca [file] [log] [blame]
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/errno.h>
28#include <linux/string.h>
29#include <linux/timer.h>
30#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/slab.h>
32#include <linux/delay.h>
33#include <linux/init.h>
34#include <linux/fb.h>
35#include <linux/console.h>
36
37#include <asm/bootinfo.h>
38#include <asm/dec/machtype.h>
39#include <asm/dec/tc.h>
40
41#include <video/fbcon.h>
42#include <video/fbcon-cfb8.h>
43
44#include "bt455.h"
45#include "bt431.h"
46
47/* Version information */
48#define DRIVER_VERSION "0.02"
49#define DRIVER_AUTHOR "Karsten Merker <merker@linuxtag.org>"
50#define DRIVER_DESCRIPTION "PMAG-AA Framebuffer Driver"
51
52/* Prototypes */
53static int aafb_set_var(struct fb_var_screeninfo *var, int con,
54 struct fb_info *info);
55
56/*
57 * Bt455 RAM DAC register base offset (rel. to TC slot base address).
58 */
59#define PMAG_AA_BT455_OFFSET 0x100000
60
61/*
62 * Bt431 cursor generator offset (rel. to TC slot base address).
63 */
64#define PMAG_AA_BT431_OFFSET 0x180000
65
66/*
67 * Begin of PMAG-AA framebuffer memory relative to TC slot address,
68 * resolution is 1280x1024x1 (8 bits deep, but only LSB is used).
69 */
70#define PMAG_AA_ONBOARD_FBMEM_OFFSET 0x200000
71
72struct aafb_cursor {
73 struct timer_list timer;
74 int enable;
75 int on;
76 int vbl_cnt;
77 int blink_rate;
78 u16 x, y, width, height;
79};
80
81#define CURSOR_TIMER_FREQ (HZ / 50)
82#define CURSOR_BLINK_RATE (20)
83#define CURSOR_DRAW_DELAY (2)
84
85struct aafb_info {
86 struct fb_info info;
87 struct display disp;
88 struct aafb_cursor cursor;
89 struct bt455_regs *bt455;
90 struct bt431_regs *bt431;
91 unsigned long fb_start;
92 unsigned long fb_size;
93 unsigned long fb_line_length;
94};
95
96/*
97 * Max 3 TURBOchannel slots -> max 3 PMAG-AA.
98 */
99static struct aafb_info my_fb_info[3];
100
101static struct aafb_par {
102} current_par;
103
104static int currcon = -1;
105
106static void aafb_set_cursor(struct aafb_info *info, int on)
107{
108 struct aafb_cursor *c = &info->cursor;
109
110 if (on) {
111 bt431_position_cursor(info->bt431, c->x, c->y);
112 bt431_enable_cursor(info->bt431);
113 } else
114 bt431_erase_cursor(info->bt431);
115}
116
117static void aafbcon_cursor(struct display *disp, int mode, int x, int y)
118{
119 struct aafb_info *info = (struct aafb_info *)disp->fb_info;
120 struct aafb_cursor *c = &info->cursor;
121
122 x *= fontwidth(disp);
123 y *= fontheight(disp);
124
125 if (c->x == x && c->y == y && (mode == CM_ERASE) == !c->enable)
126 return;
127
128 c->enable = 0;
129 if (c->on)
130 aafb_set_cursor(info, 0);
131 c->x = x - disp->var.xoffset;
132 c->y = y - disp->var.yoffset;
133
134 switch (mode) {
135 case CM_ERASE:
136 c->on = 0;
137 break;
138 case CM_DRAW:
139 case CM_MOVE:
140 if (c->on)
141 aafb_set_cursor(info, c->on);
142 else
143 c->vbl_cnt = CURSOR_DRAW_DELAY;
144 c->enable = 1;
145 break;
146 }
147}
148
149static int aafbcon_set_font(struct display *disp, int width, int height)
150{
151 struct aafb_info *info = (struct aafb_info *)disp->fb_info;
152 struct aafb_cursor *c = &info->cursor;
Thomas Pfaff91c43132008-02-06 01:39:45 -0800153 u8 fgc = ~attr_bgcol_ec(disp, disp->conp, &info->info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155 if (width > 64 || height > 64 || width < 0 || height < 0)
156 return -EINVAL;
157
158 c->height = height;
159 c->width = width;
160
161 bt431_set_font(info->bt431, fgc, width, height);
162
163 return 1;
164}
165
166static void aafb_cursor_timer_handler(unsigned long data)
167{
168 struct aafb_info *info = (struct aafb_info *)data;
169 struct aafb_cursor *c = &info->cursor;
170
171 if (!c->enable)
172 goto out;
173
174 if (c->vbl_cnt && --c->vbl_cnt == 0) {
175 c->on ^= 1;
176 aafb_set_cursor(info, c->on);
177 c->vbl_cnt = c->blink_rate;
178 }
179
180out:
181 c->timer.expires = jiffies + CURSOR_TIMER_FREQ;
182 add_timer(&c->timer);
183}
184
185static void __init aafb_cursor_init(struct aafb_info *info)
186{
187 struct aafb_cursor *c = &info->cursor;
188
189 c->enable = 1;
190 c->on = 1;
191 c->x = c->y = 0;
192 c->width = c->height = 0;
193 c->vbl_cnt = CURSOR_DRAW_DELAY;
194 c->blink_rate = CURSOR_BLINK_RATE;
195
196 init_timer(&c->timer);
197 c->timer.data = (unsigned long)info;
198 c->timer.function = aafb_cursor_timer_handler;
199 mod_timer(&c->timer, jiffies + CURSOR_TIMER_FREQ);
200}
201
202static void __exit aafb_cursor_exit(struct aafb_info *info)
203{
204 struct aafb_cursor *c = &info->cursor;
205
206 del_timer_sync(&c->timer);
207}
208
209static struct display_switch aafb_switch8 = {
210 .setup = fbcon_cfb8_setup,
211 .bmove = fbcon_cfb8_bmove,
212 .clear = fbcon_cfb8_clear,
213 .putc = fbcon_cfb8_putc,
214 .putcs = fbcon_cfb8_putcs,
215 .revc = fbcon_cfb8_revc,
216 .cursor = aafbcon_cursor,
217 .set_font = aafbcon_set_font,
218 .clear_margins = fbcon_cfb8_clear_margins,
219 .fontwidthmask = FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16)
220};
221
222static void aafb_get_par(struct aafb_par *par)
223{
224 *par = current_par;
225}
226
227static int aafb_get_fix(struct fb_fix_screeninfo *fix, int con,
228 struct fb_info *info)
229{
230 struct aafb_info *ip = (struct aafb_info *)info;
231
232 memset(fix, 0, sizeof(struct fb_fix_screeninfo));
233 strcpy(fix->id, "PMAG-AA");
234 fix->smem_start = ip->fb_start;
235 fix->smem_len = ip->fb_size;
236 fix->type = FB_TYPE_PACKED_PIXELS;
237 fix->ypanstep = 1;
238 fix->ywrapstep = 1;
239 fix->visual = FB_VISUAL_MONO10;
240 fix->line_length = 1280;
241 fix->accel = FB_ACCEL_NONE;
242
243 return 0;
244}
245
246static void aafb_set_disp(struct display *disp, int con,
247 struct aafb_info *info)
248{
249 struct fb_fix_screeninfo fix;
250
251 disp->fb_info = &info->info;
252 aafb_set_var(&disp->var, con, &info->info);
253 if (disp->conp && disp->conp->vc_sw && disp->conp->vc_sw->con_cursor)
254 disp->conp->vc_sw->con_cursor(disp->conp, CM_ERASE);
255 disp->dispsw = &aafb_switch8;
256 disp->dispsw_data = 0;
257
258 aafb_get_fix(&fix, con, &info->info);
259 disp->screen_base = (u8 *) fix.smem_start;
260 disp->visual = fix.visual;
261 disp->type = fix.type;
262 disp->type_aux = fix.type_aux;
263 disp->ypanstep = fix.ypanstep;
264 disp->ywrapstep = fix.ywrapstep;
265 disp->line_length = fix.line_length;
266 disp->next_line = 2048;
267 disp->can_soft_blank = 1;
268 disp->inverse = 0;
269 disp->scrollmode = SCROLL_YREDRAW;
270
271 aafbcon_set_font(disp, fontwidth(disp), fontheight(disp));
272}
273
274static int aafb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
275 struct fb_info *info)
276{
277 static u16 color[2] = {0x0000, 0x000f};
278 static struct fb_cmap aafb_cmap = {0, 2, color, color, color, NULL};
279
280 fb_copy_cmap(&aafb_cmap, cmap, kspc ? 0 : 2);
281 return 0;
282}
283
284static int aafb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
285 struct fb_info *info)
286{
287 u16 color[2] = {0x0000, 0x000f};
288
289 if (cmap->start == 0
290 && cmap->len == 2
291 && memcmp(cmap->red, color, sizeof(color)) == 0
292 && memcmp(cmap->green, color, sizeof(color)) == 0
293 && memcmp(cmap->blue, color, sizeof(color)) == 0
294 && cmap->transp == NULL)
295 return 0;
296 else
297 return -EINVAL;
298}
299
Christoph Hellwig67a66802006-01-14 13:21:25 -0800300static int aafb_ioctl(struct fb_info *info, u32 cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301{
302 /* TODO: Not yet implemented */
303 return -ENOIOCTLCMD;
304}
305
306static int aafb_switch(int con, struct fb_info *info)
307{
308 struct aafb_info *ip = (struct aafb_info *)info;
309 struct display *old = (currcon < 0) ? &ip->disp : (fb_display + currcon);
310 struct display *new = (con < 0) ? &ip->disp : (fb_display + con);
311
312 if (old->conp && old->conp->vc_sw && old->conp->vc_sw->con_cursor)
313 old->conp->vc_sw->con_cursor(old->conp, CM_ERASE);
314
315 /* Set the current console. */
316 currcon = con;
317 aafb_set_disp(new, con, ip);
318
319 return 0;
320}
321
322static void aafb_encode_var(struct fb_var_screeninfo *var,
323 struct aafb_par *par)
324{
325 var->xres = 1280;
326 var->yres = 1024;
327 var->xres_virtual = 2048;
328 var->yres_virtual = 1024;
329 var->xoffset = 0;
330 var->yoffset = 0;
331 var->bits_per_pixel = 8;
332 var->grayscale = 1;
333 var->red.offset = 0;
334 var->red.length = 0;
335 var->red.msb_right = 0;
336 var->green.offset = 0;
337 var->green.length = 1;
338 var->green.msb_right = 0;
339 var->blue.offset = 0;
340 var->blue.length = 0;
341 var->blue.msb_right = 0;
342 var->transp.offset = 0;
343 var->transp.length = 0;
344 var->transp.msb_right = 0;
345 var->nonstd = 0;
346 var->activate &= ~FB_ACTIVATE_MASK & FB_ACTIVATE_NOW;
347 var->accel_flags = 0;
348 var->sync = FB_SYNC_ON_GREEN;
349 var->vmode &= ~FB_VMODE_MASK & FB_VMODE_NONINTERLACED;
350}
351
352static int aafb_get_var(struct fb_var_screeninfo *var, int con,
353 struct fb_info *info)
354{
355 if (con < 0) {
356 struct aafb_par par;
357
358 memset(var, 0, sizeof(struct fb_var_screeninfo));
359 aafb_get_par(&par);
360 aafb_encode_var(var, &par);
361 } else
362 *var = info->var;
363
364 return 0;
365}
366
367static int aafb_set_var(struct fb_var_screeninfo *var, int con,
368 struct fb_info *info)
369{
370 struct aafb_par par;
371
372 aafb_get_par(&par);
373 aafb_encode_var(var, &par);
374 info->var = *var;
375
376 return 0;
377}
378
379static int aafb_update_var(int con, struct fb_info *info)
380{
381 struct aafb_info *ip = (struct aafb_info *)info;
382 struct display *disp = (con < 0) ? &ip->disp : (fb_display + con);
383
384 if (con == currcon)
385 aafbcon_cursor(disp, CM_ERASE, ip->cursor.x, ip->cursor.y);
386
387 return 0;
388}
389
390/* 0 unblanks, any other blanks. */
391
392static void aafb_blank(int blank, struct fb_info *info)
393{
394 struct aafb_info *ip = (struct aafb_info *)info;
395 u8 val = blank ? 0x00 : 0x0f;
396
397 bt455_write_cmap_entry(ip->bt455, 1, val, val, val);
398 aafbcon_cursor(&ip->disp, CM_ERASE, ip->cursor.x, ip->cursor.y);
399}
400
401static struct fb_ops aafb_ops = {
402 .owner = THIS_MODULE,
403 .fb_get_fix = aafb_get_fix,
404 .fb_get_var = aafb_get_var,
405 .fb_set_var = aafb_set_var,
406 .fb_get_cmap = aafb_get_cmap,
407 .fb_set_cmap = aafb_set_cmap,
408 .fb_ioctl = aafb_ioctl
409};
410
411static int __init init_one(int slot)
412{
Ralf Baechle61838ff2005-09-03 15:56:09 -0700413 unsigned long base_addr = CKSEG1ADDR(get_tc_base_addr(slot));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 struct aafb_info *ip = &my_fb_info[slot];
415
416 memset(ip, 0, sizeof(struct aafb_info));
417
418 /*
419 * Framebuffer display memory base address and friends.
420 */
421 ip->bt455 = (struct bt455_regs *) (base_addr + PMAG_AA_BT455_OFFSET);
422 ip->bt431 = (struct bt431_regs *) (base_addr + PMAG_AA_BT431_OFFSET);
423 ip->fb_start = base_addr + PMAG_AA_ONBOARD_FBMEM_OFFSET;
424 ip->fb_size = 2048 * 1024; /* fb_fix_screeninfo.smem_length
425 seems to be physical */
426 ip->fb_line_length = 2048;
427
428 /*
429 * Let there be consoles..
430 */
431 strcpy(ip->info.modename, "PMAG-AA");
432 ip->info.node = -1;
433 ip->info.flags = FBINFO_FLAG_DEFAULT;
434 ip->info.fbops = &aafb_ops;
435 ip->info.disp = &ip->disp;
436 ip->info.changevar = NULL;
437 ip->info.switch_con = &aafb_switch;
438 ip->info.updatevar = &aafb_update_var;
439 ip->info.blank = &aafb_blank;
440
441 aafb_set_disp(&ip->disp, currcon, ip);
442
443 /*
444 * Configure the RAM DACs.
445 */
446 bt455_erase_cursor(ip->bt455);
447
448 /* Init colormap. */
449 bt455_write_cmap_entry(ip->bt455, 0, 0x00, 0x00, 0x00);
450 bt455_write_cmap_entry(ip->bt455, 1, 0x0f, 0x0f, 0x0f);
451
452 /* Init hardware cursor. */
453 bt431_init_cursor(ip->bt431);
454 aafb_cursor_init(ip);
455
456 /* Clear the screen. */
457 memset ((void *)ip->fb_start, 0, ip->fb_size);
458
459 if (register_framebuffer(&ip->info) < 0)
460 return -EINVAL;
461
462 printk(KERN_INFO "fb%d: %s frame buffer in TC slot %d\n",
463 GET_FB_IDX(ip->info.node), ip->info.modename, slot);
464
465 return 0;
466}
467
468static int __exit exit_one(int slot)
469{
470 struct aafb_info *ip = &my_fb_info[slot];
471
472 if (unregister_framebuffer(&ip->info) < 0)
473 return -EINVAL;
474
475 return 0;
476}
477
478/*
479 * Initialise the framebuffer.
480 */
481int __init pmagaafb_init(void)
482{
483 int sid;
484 int found = 0;
485
486 while ((sid = search_tc_card("PMAG-AA")) >= 0) {
487 found = 1;
488 claim_tc_card(sid);
489 init_one(sid);
490 }
491
492 return found ? 0 : -ENXIO;
493}
494
495static void __exit pmagaafb_exit(void)
496{
497 int sid;
498
499 while ((sid = search_tc_card("PMAG-AA")) >= 0) {
500 exit_one(sid);
501 release_tc_card(sid);
502 }
503}
504
505MODULE_AUTHOR(DRIVER_AUTHOR);
506MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
507MODULE_LICENSE("GPL");
508#ifdef MODULE
509module_init(pmagaafb_init);
510module_exit(pmagaafb_exit);
511#endif