blob: 31a2bbc53974e2fd785ade7f0cc8f23f4ebaceb4 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * valkyriefb.c -- frame buffer device for the PowerMac 'valkyrie' display
3 *
4 * Created 8 August 1998 by
5 * Martin Costabel <costabel@wanadoo.fr> and Kevin Schoedel
6 *
7 * Vmode-switching changes and vmode 15/17 modifications created 29 August
8 * 1998 by Barry K. Nathan <barryn@pobox.com>.
9 *
10 * Ported to m68k Macintosh by David Huggins-Daines <dhd@debian.org>
11 *
12 * Derived directly from:
13 *
14 * controlfb.c -- frame buffer device for the PowerMac 'control' display
15 * Copyright (C) 1998 Dan Jacobowitz <dan@debian.org>
16 *
17 * pmc-valkyrie.c -- Console support for PowerMac "valkyrie" display adaptor.
18 * Copyright (C) 1997 Paul Mackerras.
19 *
20 * and indirectly:
21 *
22 * Frame buffer structure from:
23 * drivers/video/chipsfb.c -- frame buffer device for
24 * Chips & Technologies 65550 chip.
25 *
26 * Copyright (C) 1998 Paul Mackerras
27 *
28 * This file is derived from the Powermac "chips" driver:
29 * Copyright (C) 1997 Fabio Riccardi.
30 * And from the frame buffer device for Open Firmware-initialized devices:
31 * Copyright (C) 1997 Geert Uytterhoeven.
32 *
33 * Hardware information from:
34 * control.c: Console support for PowerMac "control" display adaptor.
35 * Copyright (C) 1996 Paul Mackerras
36 *
37 * This file is subject to the terms and conditions of the GNU General Public
38 * License. See the file COPYING in the main directory of this archive for
39 * more details.
40 */
41
42#include <linux/config.h>
43#include <linux/module.h>
44#include <linux/kernel.h>
45#include <linux/errno.h>
46#include <linux/string.h>
47#include <linux/mm.h>
48#include <linux/tty.h>
49#include <linux/slab.h>
50#include <linux/vmalloc.h>
51#include <linux/delay.h>
52#include <linux/interrupt.h>
53#include <linux/fb.h>
54#include <linux/selection.h>
55#include <linux/init.h>
56#include <linux/pci.h>
57#include <linux/nvram.h>
58#include <linux/adb.h>
59#include <linux/cuda.h>
60#include <asm/io.h>
61#ifdef CONFIG_MAC
62#include <asm/bootinfo.h>
63#include <asm/macintosh.h>
64#else
65#include <asm/prom.h>
66#endif
67#include <asm/pgtable.h>
68
69#include "macmodes.h"
70#include "valkyriefb.h"
71
72#ifdef CONFIG_MAC
73/* We don't yet have functions to read the PRAM... perhaps we can
74 adapt them from the PPC code? */
75static int default_vmode = VMODE_640_480_67;
76static int default_cmode = CMODE_8;
77#else
78static int default_vmode = VMODE_NVRAM;
79static int default_cmode = CMODE_NVRAM;
80#endif
81
82struct fb_par_valkyrie {
83 int vmode, cmode;
84 int xres, yres;
85 int vxres, vyres;
86 struct valkyrie_regvals *init;
87};
88
89struct fb_info_valkyrie {
90 struct fb_info info;
91 struct fb_par_valkyrie par;
92 struct cmap_regs __iomem *cmap_regs;
93 unsigned long cmap_regs_phys;
94
95 struct valkyrie_regs __iomem *valkyrie_regs;
96 unsigned long valkyrie_regs_phys;
97
98 __u8 __iomem *frame_buffer;
99 unsigned long frame_buffer_phys;
100
101 int sense;
102 unsigned long total_vram;
103
104 u32 pseudo_palette[16];
105};
106
107/*
108 * Exported functions
109 */
110int valkyriefb_init(void);
111int valkyriefb_setup(char*);
112
113static int valkyriefb_check_var(struct fb_var_screeninfo *var,
114 struct fb_info *info);
115static int valkyriefb_set_par(struct fb_info *info);
116static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
117 u_int transp, struct fb_info *info);
118static int valkyriefb_blank(int blank_mode, struct fb_info *info);
119
120static int read_valkyrie_sense(struct fb_info_valkyrie *p);
121static void set_valkyrie_clock(unsigned char *params);
122static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
123 struct fb_par_valkyrie *par, const struct fb_info *fb_info);
124
125static void valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p);
126static void valkyrie_par_to_fix(struct fb_par_valkyrie *par, struct fb_fix_screeninfo *fix);
127static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p);
128
129static struct fb_ops valkyriefb_ops = {
130 .owner = THIS_MODULE,
131 .fb_check_var = valkyriefb_check_var,
132 .fb_set_par = valkyriefb_set_par,
133 .fb_setcolreg = valkyriefb_setcolreg,
134 .fb_blank = valkyriefb_blank,
135 .fb_fillrect = cfb_fillrect,
136 .fb_copyarea = cfb_copyarea,
137 .fb_imageblit = cfb_imageblit,
138 .fb_cursor = soft_cursor,
139};
140
141/* Sets the video mode according to info->var */
142static int valkyriefb_set_par(struct fb_info *info)
143{
144 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
145 volatile struct valkyrie_regs __iomem *valkyrie_regs = p->valkyrie_regs;
146 struct fb_par_valkyrie *par = info->par;
147 struct valkyrie_regvals *init;
148 int err;
149
150 if ((err = valkyrie_var_to_par(&info->var, par, info)))
151 return err;
152
153 valkyrie_par_to_fix(par, &info->fix);
154
155 /* Reset the valkyrie */
156 out_8(&valkyrie_regs->status.r, 0);
157 udelay(100);
158
159 /* Initialize display timing registers */
160 init = par->init;
161 out_8(&valkyrie_regs->mode.r, init->mode | 0x80);
162 out_8(&valkyrie_regs->depth.r, par->cmode + 3);
163 set_valkyrie_clock(init->clock_params);
164 udelay(100);
165
166 /* Turn on display */
167 out_8(&valkyrie_regs->mode.r, init->mode);
168
169 return 0;
170}
171
172static inline int valkyrie_par_to_var(struct fb_par_valkyrie *par,
173 struct fb_var_screeninfo *var)
174{
175 return mac_vmode_to_var(par->vmode, par->cmode, var);
176}
177
178static int
179valkyriefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
180{
181 int err;
182 struct fb_par_valkyrie par;
183
184 if ((err = valkyrie_var_to_par(var, &par, info)))
185 return err;
186 valkyrie_par_to_var(&par, var);
187 return 0;
188}
189
190/*
191 * Blank the screen if blank_mode != 0, else unblank. If blank_mode == NULL
192 * then the caller blanks by setting the CLUT (Color Look Up Table) to all
193 * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
194 * to e.g. a video mode which doesn't support it. Implements VESA suspend
195 * and powerdown modes on hardware that supports disabling hsync/vsync:
196 * blank_mode == 2: suspend vsync
197 * blank_mode == 3: suspend hsync
198 * blank_mode == 4: powerdown
199 */
200static int valkyriefb_blank(int blank_mode, struct fb_info *info)
201{
202 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
203 struct fb_par_valkyrie *par = info->par;
204 struct valkyrie_regvals *init = par->init;
205
206 if (init == NULL)
207 return 1;
208
209 switch (blank_mode) {
210 case FB_BLANK_UNBLANK: /* unblank */
211 out_8(&p->valkyrie_regs->mode.r, init->mode);
212 break;
213 case FB_BLANK_NORMAL:
214 return 1; /* get caller to set CLUT to all black */
215 case FB_BLANK_VSYNC_SUSPEND:
216 case FB_BLANK_HSYNC_SUSPEND:
217 /*
218 * [kps] Value extracted from MacOS. I don't know
219 * whether this bit disables hsync or vsync, or
220 * whether the hardware can do the other as well.
221 */
222 out_8(&p->valkyrie_regs->mode.r, init->mode | 0x40);
223 break;
224 case FB_BLANK_POWERDOWN:
225 out_8(&p->valkyrie_regs->mode.r, 0x66);
226 break;
227 }
228 return 0;
229}
230
231static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
232 u_int transp, struct fb_info *info)
233{
234 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
235 volatile struct cmap_regs __iomem *cmap_regs = p->cmap_regs;
236 struct fb_par_valkyrie *par = info->par;
237
238 if (regno > 255)
239 return 1;
240 red >>= 8;
241 green >>= 8;
242 blue >>= 8;
243
244 /* tell clut which address to fill */
245 out_8(&p->cmap_regs->addr, regno);
246 udelay(1);
247 /* send one color channel at a time */
248 out_8(&cmap_regs->lut, red);
249 out_8(&cmap_regs->lut, green);
250 out_8(&cmap_regs->lut, blue);
251
252 if (regno < 16 && par->cmode == CMODE_16)
253 ((u32 *)info->pseudo_palette)[regno] =
254 (regno << 10) | (regno << 5) | regno;
255
256 return 0;
257}
258
259static inline int valkyrie_vram_reqd(int video_mode, int color_mode)
260{
261 int pitch;
262 struct valkyrie_regvals *init = valkyrie_reg_init[video_mode-1];
263
264 if ((pitch = init->pitch[color_mode]) == 0)
265 pitch = 2 * init->pitch[0];
266 return init->vres * pitch;
267}
268
269static void set_valkyrie_clock(unsigned char *params)
270{
271 struct adb_request req;
272 int i;
273
274#ifdef CONFIG_ADB_CUDA
275 for (i = 0; i < 3; ++i) {
276 cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
277 0x50, i + 1, params[i]);
278 while (!req.complete)
279 cuda_poll();
280 }
281#endif
282}
283
284static void __init valkyrie_choose_mode(struct fb_info_valkyrie *p)
285{
286 p->sense = read_valkyrie_sense(p);
287 printk(KERN_INFO "Monitor sense value = 0x%x\n", p->sense);
288
289 /* Try to pick a video mode out of NVRAM if we have one. */
290#ifndef CONFIG_MAC
291 if (default_vmode == VMODE_NVRAM) {
292 default_vmode = nvram_read_byte(NV_VMODE);
293 if (default_vmode <= 0
294 || default_vmode > VMODE_MAX
295 || !valkyrie_reg_init[default_vmode - 1])
296 default_vmode = VMODE_CHOOSE;
297 }
298#endif
299 if (default_vmode == VMODE_CHOOSE)
300 default_vmode = mac_map_monitor_sense(p->sense);
301 if (!valkyrie_reg_init[default_vmode - 1])
302 default_vmode = VMODE_640_480_67;
303#ifndef CONFIG_MAC
304 if (default_cmode == CMODE_NVRAM)
305 default_cmode = nvram_read_byte(NV_CMODE);
306#endif
307
308 /*
309 * Reduce the pixel size if we don't have enough VRAM or bandwidth.
310 */
311 if (default_cmode < CMODE_8 || default_cmode > CMODE_16
312 || valkyrie_reg_init[default_vmode-1]->pitch[default_cmode] == 0
313 || valkyrie_vram_reqd(default_vmode, default_cmode) > p->total_vram)
314 default_cmode = CMODE_8;
315
316 printk(KERN_INFO "using video mode %d and color mode %d.\n",
317 default_vmode, default_cmode);
318}
319
320int __init valkyriefb_init(void)
321{
322 struct fb_info_valkyrie *p;
323 unsigned long frame_buffer_phys, cmap_regs_phys, flags;
324 int err;
325 char *option = NULL;
326
327 if (fb_get_options("valkyriefb", &option))
328 return -ENODEV;
329 valkyriefb_setup(option);
330
331#ifdef CONFIG_MAC
332 if (!MACH_IS_MAC)
333 return 0;
334 if (!(mac_bi_data.id == MAC_MODEL_Q630
335 /* I'm not sure about this one */
336 || mac_bi_data.id == MAC_MODEL_P588))
337 return 0;
338
339 /* Hardcoded addresses... welcome to 68k Macintosh country :-) */
340 frame_buffer_phys = 0xf9000000;
341 cmap_regs_phys = 0x50f24000;
342 flags = IOMAP_NOCACHE_SER; /* IOMAP_WRITETHROUGH?? */
343#else /* ppc (!CONFIG_MAC) */
344 {
345 struct device_node *dp;
346
347 dp = find_devices("valkyrie");
348 if (dp == 0)
349 return 0;
350
351 if (dp->n_addrs != 1) {
352 printk(KERN_ERR "expecting 1 address for valkyrie (got %d)\n",
353 dp->n_addrs);
354 return 0;
355 }
356
357 frame_buffer_phys = dp->addrs[0].address;
358 cmap_regs_phys = dp->addrs[0].address+0x304000;
359 flags = _PAGE_WRITETHRU;
360 }
361#endif /* ppc (!CONFIG_MAC) */
362
363 p = kmalloc(sizeof(*p), GFP_ATOMIC);
364 if (p == 0)
365 return -ENOMEM;
366 memset(p, 0, sizeof(*p));
367
368 /* Map in frame buffer and registers */
369 if (!request_mem_region(frame_buffer_phys, 0x100000, "valkyriefb")) {
370 kfree(p);
371 return 0;
372 }
373 p->total_vram = 0x100000;
374 p->frame_buffer_phys = frame_buffer_phys;
375 p->frame_buffer = __ioremap(frame_buffer_phys, p->total_vram, flags);
376 p->cmap_regs_phys = cmap_regs_phys;
377 p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
378 p->valkyrie_regs_phys = cmap_regs_phys+0x6000;
379 p->valkyrie_regs = ioremap(p->valkyrie_regs_phys, 0x1000);
380 err = -ENOMEM;
381 if (p->frame_buffer == NULL || p->cmap_regs == NULL
382 || p->valkyrie_regs == NULL) {
383 printk(KERN_ERR "valkyriefb: couldn't map resources\n");
384 goto out_free;
385 }
386
387 valkyrie_choose_mode(p);
388 mac_vmode_to_var(default_vmode, default_cmode, &p->info.var);
389 valkyrie_init_info(&p->info, p);
390 valkyrie_init_fix(&p->info.fix, p);
391 if (valkyriefb_set_par(&p->info))
392 /* "can't happen" */
393 printk(KERN_ERR "valkyriefb: can't set default video mode\n");
394
395 if ((err = register_framebuffer(&p->info)) != 0)
396 goto out_free;
397
398 printk(KERN_INFO "fb%d: valkyrie frame buffer device\n", p->info.node);
399 return 0;
400
401 out_free:
402 if (p->frame_buffer)
403 iounmap(p->frame_buffer);
404 if (p->cmap_regs)
405 iounmap(p->cmap_regs);
406 if (p->valkyrie_regs)
407 iounmap(p->valkyrie_regs);
408 kfree(p);
409 return err;
410}
411
412/*
413 * Get the monitor sense value.
414 */
415static int read_valkyrie_sense(struct fb_info_valkyrie *p)
416{
417 int sense, in;
418
419 out_8(&p->valkyrie_regs->msense.r, 0); /* release all lines */
420 __delay(20000);
421 sense = ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x70) << 4;
422 /* drive each sense line low in turn and collect the other 2 */
423 out_8(&p->valkyrie_regs->msense.r, 4); /* drive A low */
424 __delay(20000);
425 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x30);
426 out_8(&p->valkyrie_regs->msense.r, 2); /* drive B low */
427 __delay(20000);
428 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x40) >> 3;
429 sense |= (in & 0x10) >> 2;
430 out_8(&p->valkyrie_regs->msense.r, 1); /* drive C low */
431 __delay(20000);
432 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x60) >> 5;
433
434 out_8(&p->valkyrie_regs->msense.r, 7);
435
436 return sense;
437}
438
439/*
440 * This routine takes a user-supplied var,
441 * and picks the best vmode/cmode from it.
442 */
443
444/* [bkn] I did a major overhaul of this function.
445 *
446 * Much of the old code was "swiped by jonh from atyfb.c". Because
447 * macmodes has mac_var_to_vmode, I felt that it would be better to
448 * rework this function to use that, instead of reinventing the wheel to
449 * add support for vmode 17. This was reinforced by the fact that
450 * the previously swiped atyfb.c code is no longer there.
451 *
452 * So, I swiped and adapted platinum_var_to_par (from platinumfb.c), replacing
453 * most, but not all, of the old code in the process. One side benefit of
454 * swiping the platinumfb code is that we now have more comprehensible error
455 * messages when a vmode/cmode switch fails. (Most of the error messages are
456 * platinumfb.c, but I added two of my own, and I also changed some commas
457 * into colons to make the messages more consistent with other Linux error
458 * messages.) In addition, I think the new code *might* fix some vmode-
459 * switching oddities, but I'm not sure.
460 *
461 * There may be some more opportunities for cleanup in here, but this is a
462 * good start...
463 */
464
465static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
466 struct fb_par_valkyrie *par, const struct fb_info *fb_info)
467{
468 int vmode, cmode;
469 struct valkyrie_regvals *init;
470 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) fb_info;
471
472 if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
473 printk(KERN_ERR "valkyriefb: can't do %dx%dx%d.\n",
474 var->xres, var->yres, var->bits_per_pixel);
475 return -EINVAL;
476 }
477
478 /* Check if we know about the wanted video mode */
479 if (vmode < 1 || vmode > VMODE_MAX || !valkyrie_reg_init[vmode-1]) {
480 printk(KERN_ERR "valkyriefb: vmode %d not valid.\n", vmode);
481 return -EINVAL;
482 }
483
484 if (cmode != CMODE_8 && cmode != CMODE_16) {
485 printk(KERN_ERR "valkyriefb: cmode %d not valid.\n", cmode);
486 return -EINVAL;
487 }
488
489 if (var->xres_virtual > var->xres || var->yres_virtual > var->yres
490 || var->xoffset != 0 || var->yoffset != 0) {
491 return -EINVAL;
492 }
493
494 init = valkyrie_reg_init[vmode-1];
495 if (init->pitch[cmode] == 0) {
496 printk(KERN_ERR "valkyriefb: vmode %d does not support "
497 "cmode %d.\n", vmode, cmode);
498 return -EINVAL;
499 }
500
501 if (valkyrie_vram_reqd(vmode, cmode) > p->total_vram) {
502 printk(KERN_ERR "valkyriefb: not enough ram for vmode %d, "
503 "cmode %d.\n", vmode, cmode);
504 return -EINVAL;
505 }
506
507 par->vmode = vmode;
508 par->cmode = cmode;
509 par->init = init;
510 par->xres = var->xres;
511 par->yres = var->yres;
512 par->vxres = par->xres;
513 par->vyres = par->yres;
514
515 return 0;
516}
517
518static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p)
519{
520 memset(fix, 0, sizeof(*fix));
521 strcpy(fix->id, "valkyrie");
522 fix->mmio_start = p->valkyrie_regs_phys;
523 fix->mmio_len = sizeof(struct valkyrie_regs);
524 fix->type = FB_TYPE_PACKED_PIXELS;
525 fix->smem_start = p->frame_buffer_phys + 0x1000;
526 fix->smem_len = p->total_vram;
527
528 fix->type_aux = 0;
529 fix->ywrapstep = 0;
530 fix->ypanstep = 0;
531 fix->xpanstep = 0;
532
533}
534
535/* Fix must already be inited above */
536static void valkyrie_par_to_fix(struct fb_par_valkyrie *par,
537 struct fb_fix_screeninfo *fix)
538{
539 fix->smem_len = valkyrie_vram_reqd(par->vmode, par->cmode);
540 fix->visual = (par->cmode == CMODE_8) ?
541 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
542 fix->line_length = par->vxres << par->cmode;
543 /* ywrapstep, xpanstep, ypanstep */
544}
545
546static void __init valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p)
547{
548 info->fbops = &valkyriefb_ops;
549 info->screen_base = p->frame_buffer + 0x1000;
550 info->flags = FBINFO_DEFAULT;
551 info->pseudo_palette = p->pseudo_palette;
552 fb_alloc_cmap(&info->cmap, 256, 0);
553 info->par = &p->par;
554}
555
556
557/*
558 * Parse user speficied options (`video=valkyriefb:')
559 */
560int __init valkyriefb_setup(char *options)
561{
562 char *this_opt;
563
564 if (!options || !*options)
565 return 0;
566
567 while ((this_opt = strsep(&options, ",")) != NULL) {
568 if (!strncmp(this_opt, "vmode:", 6)) {
569 int vmode = simple_strtoul(this_opt+6, NULL, 0);
570 if (vmode > 0 && vmode <= VMODE_MAX)
571 default_vmode = vmode;
572 }
573 else if (!strncmp(this_opt, "cmode:", 6)) {
574 int depth = simple_strtoul(this_opt+6, NULL, 0);
575 switch (depth) {
576 case 8:
577 default_cmode = CMODE_8;
578 break;
579 case 15:
580 case 16:
581 default_cmode = CMODE_16;
582 break;
583 }
584 }
585 }
586 return 0;
587}
588
589module_init(valkyriefb_init);
590MODULE_LICENSE("GPL");