blob: 2bdeb4baa9529c53426a76dfd27a9b3afbee9c2d [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,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138};
139
140/* Sets the video mode according to info->var */
141static int valkyriefb_set_par(struct fb_info *info)
142{
143 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
144 volatile struct valkyrie_regs __iomem *valkyrie_regs = p->valkyrie_regs;
145 struct fb_par_valkyrie *par = info->par;
146 struct valkyrie_regvals *init;
147 int err;
148
149 if ((err = valkyrie_var_to_par(&info->var, par, info)))
150 return err;
151
152 valkyrie_par_to_fix(par, &info->fix);
153
154 /* Reset the valkyrie */
155 out_8(&valkyrie_regs->status.r, 0);
156 udelay(100);
157
158 /* Initialize display timing registers */
159 init = par->init;
160 out_8(&valkyrie_regs->mode.r, init->mode | 0x80);
161 out_8(&valkyrie_regs->depth.r, par->cmode + 3);
162 set_valkyrie_clock(init->clock_params);
163 udelay(100);
164
165 /* Turn on display */
166 out_8(&valkyrie_regs->mode.r, init->mode);
167
168 return 0;
169}
170
171static inline int valkyrie_par_to_var(struct fb_par_valkyrie *par,
172 struct fb_var_screeninfo *var)
173{
174 return mac_vmode_to_var(par->vmode, par->cmode, var);
175}
176
177static int
178valkyriefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
179{
180 int err;
181 struct fb_par_valkyrie par;
182
183 if ((err = valkyrie_var_to_par(var, &par, info)))
184 return err;
185 valkyrie_par_to_var(&par, var);
186 return 0;
187}
188
189/*
190 * Blank the screen if blank_mode != 0, else unblank. If blank_mode == NULL
191 * then the caller blanks by setting the CLUT (Color Look Up Table) to all
192 * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
193 * to e.g. a video mode which doesn't support it. Implements VESA suspend
194 * and powerdown modes on hardware that supports disabling hsync/vsync:
195 * blank_mode == 2: suspend vsync
196 * blank_mode == 3: suspend hsync
197 * blank_mode == 4: powerdown
198 */
199static int valkyriefb_blank(int blank_mode, struct fb_info *info)
200{
201 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
202 struct fb_par_valkyrie *par = info->par;
203 struct valkyrie_regvals *init = par->init;
204
205 if (init == NULL)
206 return 1;
207
208 switch (blank_mode) {
209 case FB_BLANK_UNBLANK: /* unblank */
210 out_8(&p->valkyrie_regs->mode.r, init->mode);
211 break;
212 case FB_BLANK_NORMAL:
213 return 1; /* get caller to set CLUT to all black */
214 case FB_BLANK_VSYNC_SUSPEND:
215 case FB_BLANK_HSYNC_SUSPEND:
216 /*
217 * [kps] Value extracted from MacOS. I don't know
218 * whether this bit disables hsync or vsync, or
219 * whether the hardware can do the other as well.
220 */
221 out_8(&p->valkyrie_regs->mode.r, init->mode | 0x40);
222 break;
223 case FB_BLANK_POWERDOWN:
224 out_8(&p->valkyrie_regs->mode.r, 0x66);
225 break;
226 }
227 return 0;
228}
229
230static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
231 u_int transp, struct fb_info *info)
232{
233 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
234 volatile struct cmap_regs __iomem *cmap_regs = p->cmap_regs;
235 struct fb_par_valkyrie *par = info->par;
236
237 if (regno > 255)
238 return 1;
239 red >>= 8;
240 green >>= 8;
241 blue >>= 8;
242
243 /* tell clut which address to fill */
244 out_8(&p->cmap_regs->addr, regno);
245 udelay(1);
246 /* send one color channel at a time */
247 out_8(&cmap_regs->lut, red);
248 out_8(&cmap_regs->lut, green);
249 out_8(&cmap_regs->lut, blue);
250
251 if (regno < 16 && par->cmode == CMODE_16)
252 ((u32 *)info->pseudo_palette)[regno] =
253 (regno << 10) | (regno << 5) | regno;
254
255 return 0;
256}
257
258static inline int valkyrie_vram_reqd(int video_mode, int color_mode)
259{
260 int pitch;
261 struct valkyrie_regvals *init = valkyrie_reg_init[video_mode-1];
262
263 if ((pitch = init->pitch[color_mode]) == 0)
264 pitch = 2 * init->pitch[0];
265 return init->vres * pitch;
266}
267
268static void set_valkyrie_clock(unsigned char *params)
269{
270 struct adb_request req;
271 int i;
272
273#ifdef CONFIG_ADB_CUDA
274 for (i = 0; i < 3; ++i) {
275 cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
276 0x50, i + 1, params[i]);
277 while (!req.complete)
278 cuda_poll();
279 }
280#endif
281}
282
283static void __init valkyrie_choose_mode(struct fb_info_valkyrie *p)
284{
285 p->sense = read_valkyrie_sense(p);
286 printk(KERN_INFO "Monitor sense value = 0x%x\n", p->sense);
287
288 /* Try to pick a video mode out of NVRAM if we have one. */
289#ifndef CONFIG_MAC
290 if (default_vmode == VMODE_NVRAM) {
291 default_vmode = nvram_read_byte(NV_VMODE);
292 if (default_vmode <= 0
293 || default_vmode > VMODE_MAX
294 || !valkyrie_reg_init[default_vmode - 1])
295 default_vmode = VMODE_CHOOSE;
296 }
297#endif
298 if (default_vmode == VMODE_CHOOSE)
299 default_vmode = mac_map_monitor_sense(p->sense);
300 if (!valkyrie_reg_init[default_vmode - 1])
301 default_vmode = VMODE_640_480_67;
302#ifndef CONFIG_MAC
303 if (default_cmode == CMODE_NVRAM)
304 default_cmode = nvram_read_byte(NV_CMODE);
305#endif
306
307 /*
308 * Reduce the pixel size if we don't have enough VRAM or bandwidth.
309 */
310 if (default_cmode < CMODE_8 || default_cmode > CMODE_16
311 || valkyrie_reg_init[default_vmode-1]->pitch[default_cmode] == 0
312 || valkyrie_vram_reqd(default_vmode, default_cmode) > p->total_vram)
313 default_cmode = CMODE_8;
314
315 printk(KERN_INFO "using video mode %d and color mode %d.\n",
316 default_vmode, default_cmode);
317}
318
319int __init valkyriefb_init(void)
320{
321 struct fb_info_valkyrie *p;
322 unsigned long frame_buffer_phys, cmap_regs_phys, flags;
323 int err;
324 char *option = NULL;
325
326 if (fb_get_options("valkyriefb", &option))
327 return -ENODEV;
328 valkyriefb_setup(option);
329
330#ifdef CONFIG_MAC
331 if (!MACH_IS_MAC)
332 return 0;
333 if (!(mac_bi_data.id == MAC_MODEL_Q630
334 /* I'm not sure about this one */
335 || mac_bi_data.id == MAC_MODEL_P588))
336 return 0;
337
338 /* Hardcoded addresses... welcome to 68k Macintosh country :-) */
339 frame_buffer_phys = 0xf9000000;
340 cmap_regs_phys = 0x50f24000;
341 flags = IOMAP_NOCACHE_SER; /* IOMAP_WRITETHROUGH?? */
342#else /* ppc (!CONFIG_MAC) */
343 {
344 struct device_node *dp;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100345 struct resource r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100347 dp = of_find_node_by_name(NULL, "valkyrie");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 if (dp == 0)
349 return 0;
350
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100351 if (of_address_to_resource(dp, 0, &r)) {
352 printk(KERN_ERR "can't find address for valkyrie\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 return 0;
354 }
355
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100356 frame_buffer_phys = r.start;
357 cmap_regs_phys = r.start + 0x304000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 flags = _PAGE_WRITETHRU;
359 }
360#endif /* ppc (!CONFIG_MAC) */
361
362 p = kmalloc(sizeof(*p), GFP_ATOMIC);
363 if (p == 0)
364 return -ENOMEM;
365 memset(p, 0, sizeof(*p));
366
367 /* Map in frame buffer and registers */
368 if (!request_mem_region(frame_buffer_phys, 0x100000, "valkyriefb")) {
369 kfree(p);
370 return 0;
371 }
372 p->total_vram = 0x100000;
373 p->frame_buffer_phys = frame_buffer_phys;
374 p->frame_buffer = __ioremap(frame_buffer_phys, p->total_vram, flags);
375 p->cmap_regs_phys = cmap_regs_phys;
376 p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
377 p->valkyrie_regs_phys = cmap_regs_phys+0x6000;
378 p->valkyrie_regs = ioremap(p->valkyrie_regs_phys, 0x1000);
379 err = -ENOMEM;
380 if (p->frame_buffer == NULL || p->cmap_regs == NULL
381 || p->valkyrie_regs == NULL) {
382 printk(KERN_ERR "valkyriefb: couldn't map resources\n");
383 goto out_free;
384 }
385
386 valkyrie_choose_mode(p);
387 mac_vmode_to_var(default_vmode, default_cmode, &p->info.var);
388 valkyrie_init_info(&p->info, p);
389 valkyrie_init_fix(&p->info.fix, p);
390 if (valkyriefb_set_par(&p->info))
391 /* "can't happen" */
392 printk(KERN_ERR "valkyriefb: can't set default video mode\n");
393
394 if ((err = register_framebuffer(&p->info)) != 0)
395 goto out_free;
396
397 printk(KERN_INFO "fb%d: valkyrie frame buffer device\n", p->info.node);
398 return 0;
399
400 out_free:
401 if (p->frame_buffer)
402 iounmap(p->frame_buffer);
403 if (p->cmap_regs)
404 iounmap(p->cmap_regs);
405 if (p->valkyrie_regs)
406 iounmap(p->valkyrie_regs);
407 kfree(p);
408 return err;
409}
410
411/*
412 * Get the monitor sense value.
413 */
414static int read_valkyrie_sense(struct fb_info_valkyrie *p)
415{
416 int sense, in;
417
418 out_8(&p->valkyrie_regs->msense.r, 0); /* release all lines */
419 __delay(20000);
420 sense = ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x70) << 4;
421 /* drive each sense line low in turn and collect the other 2 */
422 out_8(&p->valkyrie_regs->msense.r, 4); /* drive A low */
423 __delay(20000);
424 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x30);
425 out_8(&p->valkyrie_regs->msense.r, 2); /* drive B low */
426 __delay(20000);
427 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x40) >> 3;
428 sense |= (in & 0x10) >> 2;
429 out_8(&p->valkyrie_regs->msense.r, 1); /* drive C low */
430 __delay(20000);
431 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x60) >> 5;
432
433 out_8(&p->valkyrie_regs->msense.r, 7);
434
435 return sense;
436}
437
438/*
439 * This routine takes a user-supplied var,
440 * and picks the best vmode/cmode from it.
441 */
442
443/* [bkn] I did a major overhaul of this function.
444 *
445 * Much of the old code was "swiped by jonh from atyfb.c". Because
446 * macmodes has mac_var_to_vmode, I felt that it would be better to
447 * rework this function to use that, instead of reinventing the wheel to
448 * add support for vmode 17. This was reinforced by the fact that
449 * the previously swiped atyfb.c code is no longer there.
450 *
451 * So, I swiped and adapted platinum_var_to_par (from platinumfb.c), replacing
452 * most, but not all, of the old code in the process. One side benefit of
453 * swiping the platinumfb code is that we now have more comprehensible error
454 * messages when a vmode/cmode switch fails. (Most of the error messages are
455 * platinumfb.c, but I added two of my own, and I also changed some commas
456 * into colons to make the messages more consistent with other Linux error
457 * messages.) In addition, I think the new code *might* fix some vmode-
458 * switching oddities, but I'm not sure.
459 *
460 * There may be some more opportunities for cleanup in here, but this is a
461 * good start...
462 */
463
464static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
465 struct fb_par_valkyrie *par, const struct fb_info *fb_info)
466{
467 int vmode, cmode;
468 struct valkyrie_regvals *init;
469 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) fb_info;
470
471 if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
472 printk(KERN_ERR "valkyriefb: can't do %dx%dx%d.\n",
473 var->xres, var->yres, var->bits_per_pixel);
474 return -EINVAL;
475 }
476
477 /* Check if we know about the wanted video mode */
478 if (vmode < 1 || vmode > VMODE_MAX || !valkyrie_reg_init[vmode-1]) {
479 printk(KERN_ERR "valkyriefb: vmode %d not valid.\n", vmode);
480 return -EINVAL;
481 }
482
483 if (cmode != CMODE_8 && cmode != CMODE_16) {
484 printk(KERN_ERR "valkyriefb: cmode %d not valid.\n", cmode);
485 return -EINVAL;
486 }
487
488 if (var->xres_virtual > var->xres || var->yres_virtual > var->yres
489 || var->xoffset != 0 || var->yoffset != 0) {
490 return -EINVAL;
491 }
492
493 init = valkyrie_reg_init[vmode-1];
494 if (init->pitch[cmode] == 0) {
495 printk(KERN_ERR "valkyriefb: vmode %d does not support "
496 "cmode %d.\n", vmode, cmode);
497 return -EINVAL;
498 }
499
500 if (valkyrie_vram_reqd(vmode, cmode) > p->total_vram) {
501 printk(KERN_ERR "valkyriefb: not enough ram for vmode %d, "
502 "cmode %d.\n", vmode, cmode);
503 return -EINVAL;
504 }
505
506 par->vmode = vmode;
507 par->cmode = cmode;
508 par->init = init;
509 par->xres = var->xres;
510 par->yres = var->yres;
511 par->vxres = par->xres;
512 par->vyres = par->yres;
513
514 return 0;
515}
516
517static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p)
518{
519 memset(fix, 0, sizeof(*fix));
520 strcpy(fix->id, "valkyrie");
521 fix->mmio_start = p->valkyrie_regs_phys;
522 fix->mmio_len = sizeof(struct valkyrie_regs);
523 fix->type = FB_TYPE_PACKED_PIXELS;
524 fix->smem_start = p->frame_buffer_phys + 0x1000;
525 fix->smem_len = p->total_vram;
526
527 fix->type_aux = 0;
528 fix->ywrapstep = 0;
529 fix->ypanstep = 0;
530 fix->xpanstep = 0;
531
532}
533
534/* Fix must already be inited above */
535static void valkyrie_par_to_fix(struct fb_par_valkyrie *par,
536 struct fb_fix_screeninfo *fix)
537{
538 fix->smem_len = valkyrie_vram_reqd(par->vmode, par->cmode);
539 fix->visual = (par->cmode == CMODE_8) ?
540 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
541 fix->line_length = par->vxres << par->cmode;
542 /* ywrapstep, xpanstep, ypanstep */
543}
544
545static void __init valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p)
546{
547 info->fbops = &valkyriefb_ops;
548 info->screen_base = p->frame_buffer + 0x1000;
549 info->flags = FBINFO_DEFAULT;
550 info->pseudo_palette = p->pseudo_palette;
551 fb_alloc_cmap(&info->cmap, 256, 0);
552 info->par = &p->par;
553}
554
555
556/*
557 * Parse user speficied options (`video=valkyriefb:')
558 */
559int __init valkyriefb_setup(char *options)
560{
561 char *this_opt;
562
563 if (!options || !*options)
564 return 0;
565
566 while ((this_opt = strsep(&options, ",")) != NULL) {
567 if (!strncmp(this_opt, "vmode:", 6)) {
568 int vmode = simple_strtoul(this_opt+6, NULL, 0);
569 if (vmode > 0 && vmode <= VMODE_MAX)
570 default_vmode = vmode;
571 }
572 else if (!strncmp(this_opt, "cmode:", 6)) {
573 int depth = simple_strtoul(this_opt+6, NULL, 0);
574 switch (depth) {
575 case 8:
576 default_cmode = CMODE_8;
577 break;
578 case 15:
579 case 16:
580 default_cmode = CMODE_16;
581 break;
582 }
583 }
584 }
585 return 0;
586}
587
588module_init(valkyriefb_init);
589MODULE_LICENSE("GPL");