blob: 06fc19a6119249a8a6128799c1d9fd226f36494b [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
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/module.h>
43#include <linux/kernel.h>
44#include <linux/errno.h>
45#include <linux/string.h>
46#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <linux/slab.h>
48#include <linux/vmalloc.h>
49#include <linux/delay.h>
50#include <linux/interrupt.h>
51#include <linux/fb.h>
52#include <linux/selection.h>
53#include <linux/init.h>
54#include <linux/pci.h>
55#include <linux/nvram.h>
56#include <linux/adb.h>
57#include <linux/cuda.h>
58#include <asm/io.h>
59#ifdef CONFIG_MAC
60#include <asm/bootinfo.h>
61#include <asm/macintosh.h>
62#else
63#include <asm/prom.h>
64#endif
65#include <asm/pgtable.h>
66
67#include "macmodes.h"
68#include "valkyriefb.h"
69
70#ifdef CONFIG_MAC
71/* We don't yet have functions to read the PRAM... perhaps we can
72 adapt them from the PPC code? */
73static int default_vmode = VMODE_640_480_67;
74static int default_cmode = CMODE_8;
75#else
76static int default_vmode = VMODE_NVRAM;
77static int default_cmode = CMODE_NVRAM;
78#endif
79
80struct fb_par_valkyrie {
81 int vmode, cmode;
82 int xres, yres;
83 int vxres, vyres;
84 struct valkyrie_regvals *init;
85};
86
87struct fb_info_valkyrie {
88 struct fb_info info;
89 struct fb_par_valkyrie par;
90 struct cmap_regs __iomem *cmap_regs;
91 unsigned long cmap_regs_phys;
92
93 struct valkyrie_regs __iomem *valkyrie_regs;
94 unsigned long valkyrie_regs_phys;
95
96 __u8 __iomem *frame_buffer;
97 unsigned long frame_buffer_phys;
98
99 int sense;
100 unsigned long total_vram;
101
102 u32 pseudo_palette[16];
103};
104
105/*
106 * Exported functions
107 */
108int valkyriefb_init(void);
109int valkyriefb_setup(char*);
110
111static int valkyriefb_check_var(struct fb_var_screeninfo *var,
112 struct fb_info *info);
113static int valkyriefb_set_par(struct fb_info *info);
114static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
115 u_int transp, struct fb_info *info);
116static int valkyriefb_blank(int blank_mode, struct fb_info *info);
117
118static int read_valkyrie_sense(struct fb_info_valkyrie *p);
119static void set_valkyrie_clock(unsigned char *params);
120static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
121 struct fb_par_valkyrie *par, const struct fb_info *fb_info);
122
123static void valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p);
124static void valkyrie_par_to_fix(struct fb_par_valkyrie *par, struct fb_fix_screeninfo *fix);
125static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p);
126
127static struct fb_ops valkyriefb_ops = {
128 .owner = THIS_MODULE,
129 .fb_check_var = valkyriefb_check_var,
130 .fb_set_par = valkyriefb_set_par,
131 .fb_setcolreg = valkyriefb_setcolreg,
132 .fb_blank = valkyriefb_blank,
133 .fb_fillrect = cfb_fillrect,
134 .fb_copyarea = cfb_copyarea,
135 .fb_imageblit = cfb_imageblit,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136};
137
138/* Sets the video mode according to info->var */
139static int valkyriefb_set_par(struct fb_info *info)
140{
141 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
142 volatile struct valkyrie_regs __iomem *valkyrie_regs = p->valkyrie_regs;
143 struct fb_par_valkyrie *par = info->par;
144 struct valkyrie_regvals *init;
145 int err;
146
147 if ((err = valkyrie_var_to_par(&info->var, par, info)))
148 return err;
149
150 valkyrie_par_to_fix(par, &info->fix);
151
152 /* Reset the valkyrie */
153 out_8(&valkyrie_regs->status.r, 0);
154 udelay(100);
155
156 /* Initialize display timing registers */
157 init = par->init;
158 out_8(&valkyrie_regs->mode.r, init->mode | 0x80);
159 out_8(&valkyrie_regs->depth.r, par->cmode + 3);
160 set_valkyrie_clock(init->clock_params);
161 udelay(100);
162
163 /* Turn on display */
164 out_8(&valkyrie_regs->mode.r, init->mode);
165
166 return 0;
167}
168
169static inline int valkyrie_par_to_var(struct fb_par_valkyrie *par,
170 struct fb_var_screeninfo *var)
171{
172 return mac_vmode_to_var(par->vmode, par->cmode, var);
173}
174
175static int
176valkyriefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
177{
178 int err;
179 struct fb_par_valkyrie par;
180
181 if ((err = valkyrie_var_to_par(var, &par, info)))
182 return err;
183 valkyrie_par_to_var(&par, var);
184 return 0;
185}
186
187/*
188 * Blank the screen if blank_mode != 0, else unblank. If blank_mode == NULL
189 * then the caller blanks by setting the CLUT (Color Look Up Table) to all
190 * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
191 * to e.g. a video mode which doesn't support it. Implements VESA suspend
192 * and powerdown modes on hardware that supports disabling hsync/vsync:
193 * blank_mode == 2: suspend vsync
194 * blank_mode == 3: suspend hsync
195 * blank_mode == 4: powerdown
196 */
197static int valkyriefb_blank(int blank_mode, struct fb_info *info)
198{
199 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
200 struct fb_par_valkyrie *par = info->par;
201 struct valkyrie_regvals *init = par->init;
202
203 if (init == NULL)
204 return 1;
205
206 switch (blank_mode) {
207 case FB_BLANK_UNBLANK: /* unblank */
208 out_8(&p->valkyrie_regs->mode.r, init->mode);
209 break;
210 case FB_BLANK_NORMAL:
211 return 1; /* get caller to set CLUT to all black */
212 case FB_BLANK_VSYNC_SUSPEND:
213 case FB_BLANK_HSYNC_SUSPEND:
214 /*
215 * [kps] Value extracted from MacOS. I don't know
216 * whether this bit disables hsync or vsync, or
217 * whether the hardware can do the other as well.
218 */
219 out_8(&p->valkyrie_regs->mode.r, init->mode | 0x40);
220 break;
221 case FB_BLANK_POWERDOWN:
222 out_8(&p->valkyrie_regs->mode.r, 0x66);
223 break;
224 }
225 return 0;
226}
227
228static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
229 u_int transp, struct fb_info *info)
230{
231 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
232 volatile struct cmap_regs __iomem *cmap_regs = p->cmap_regs;
233 struct fb_par_valkyrie *par = info->par;
234
235 if (regno > 255)
236 return 1;
237 red >>= 8;
238 green >>= 8;
239 blue >>= 8;
240
241 /* tell clut which address to fill */
242 out_8(&p->cmap_regs->addr, regno);
243 udelay(1);
244 /* send one color channel at a time */
245 out_8(&cmap_regs->lut, red);
246 out_8(&cmap_regs->lut, green);
247 out_8(&cmap_regs->lut, blue);
248
249 if (regno < 16 && par->cmode == CMODE_16)
250 ((u32 *)info->pseudo_palette)[regno] =
251 (regno << 10) | (regno << 5) | regno;
252
253 return 0;
254}
255
256static inline int valkyrie_vram_reqd(int video_mode, int color_mode)
257{
258 int pitch;
259 struct valkyrie_regvals *init = valkyrie_reg_init[video_mode-1];
260
261 if ((pitch = init->pitch[color_mode]) == 0)
262 pitch = 2 * init->pitch[0];
263 return init->vres * pitch;
264}
265
266static void set_valkyrie_clock(unsigned char *params)
267{
268 struct adb_request req;
269 int i;
270
271#ifdef CONFIG_ADB_CUDA
272 for (i = 0; i < 3; ++i) {
273 cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
274 0x50, i + 1, params[i]);
275 while (!req.complete)
276 cuda_poll();
277 }
278#endif
279}
280
281static void __init valkyrie_choose_mode(struct fb_info_valkyrie *p)
282{
283 p->sense = read_valkyrie_sense(p);
284 printk(KERN_INFO "Monitor sense value = 0x%x\n", p->sense);
285
286 /* Try to pick a video mode out of NVRAM if we have one. */
Ben Collins996f3242006-10-18 08:53:37 -0400287#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 if (default_vmode == VMODE_NVRAM) {
289 default_vmode = nvram_read_byte(NV_VMODE);
290 if (default_vmode <= 0
291 || default_vmode > VMODE_MAX
292 || !valkyrie_reg_init[default_vmode - 1])
293 default_vmode = VMODE_CHOOSE;
294 }
295#endif
296 if (default_vmode == VMODE_CHOOSE)
297 default_vmode = mac_map_monitor_sense(p->sense);
298 if (!valkyrie_reg_init[default_vmode - 1])
299 default_vmode = VMODE_640_480_67;
Ben Collins996f3242006-10-18 08:53:37 -0400300#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 if (default_cmode == CMODE_NVRAM)
302 default_cmode = nvram_read_byte(NV_CMODE);
303#endif
304
305 /*
306 * Reduce the pixel size if we don't have enough VRAM or bandwidth.
307 */
308 if (default_cmode < CMODE_8 || default_cmode > CMODE_16
309 || valkyrie_reg_init[default_vmode-1]->pitch[default_cmode] == 0
310 || valkyrie_vram_reqd(default_vmode, default_cmode) > p->total_vram)
311 default_cmode = CMODE_8;
312
313 printk(KERN_INFO "using video mode %d and color mode %d.\n",
314 default_vmode, default_cmode);
315}
316
317int __init valkyriefb_init(void)
318{
319 struct fb_info_valkyrie *p;
320 unsigned long frame_buffer_phys, cmap_regs_phys, flags;
321 int err;
322 char *option = NULL;
323
324 if (fb_get_options("valkyriefb", &option))
325 return -ENODEV;
326 valkyriefb_setup(option);
327
328#ifdef CONFIG_MAC
329 if (!MACH_IS_MAC)
330 return 0;
331 if (!(mac_bi_data.id == MAC_MODEL_Q630
332 /* I'm not sure about this one */
333 || mac_bi_data.id == MAC_MODEL_P588))
334 return 0;
335
336 /* Hardcoded addresses... welcome to 68k Macintosh country :-) */
337 frame_buffer_phys = 0xf9000000;
338 cmap_regs_phys = 0x50f24000;
339 flags = IOMAP_NOCACHE_SER; /* IOMAP_WRITETHROUGH?? */
340#else /* ppc (!CONFIG_MAC) */
341 {
342 struct device_node *dp;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100343 struct resource r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100345 dp = of_find_node_by_name(NULL, "valkyrie");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 if (dp == 0)
347 return 0;
348
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100349 if (of_address_to_resource(dp, 0, &r)) {
350 printk(KERN_ERR "can't find address for valkyrie\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 return 0;
352 }
353
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100354 frame_buffer_phys = r.start;
355 cmap_regs_phys = r.start + 0x304000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 flags = _PAGE_WRITETHRU;
357 }
358#endif /* ppc (!CONFIG_MAC) */
359
360 p = kmalloc(sizeof(*p), GFP_ATOMIC);
361 if (p == 0)
362 return -ENOMEM;
363 memset(p, 0, sizeof(*p));
364
365 /* Map in frame buffer and registers */
366 if (!request_mem_region(frame_buffer_phys, 0x100000, "valkyriefb")) {
367 kfree(p);
368 return 0;
369 }
370 p->total_vram = 0x100000;
371 p->frame_buffer_phys = frame_buffer_phys;
372 p->frame_buffer = __ioremap(frame_buffer_phys, p->total_vram, flags);
373 p->cmap_regs_phys = cmap_regs_phys;
374 p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
375 p->valkyrie_regs_phys = cmap_regs_phys+0x6000;
376 p->valkyrie_regs = ioremap(p->valkyrie_regs_phys, 0x1000);
377 err = -ENOMEM;
378 if (p->frame_buffer == NULL || p->cmap_regs == NULL
379 || p->valkyrie_regs == NULL) {
380 printk(KERN_ERR "valkyriefb: couldn't map resources\n");
381 goto out_free;
382 }
383
384 valkyrie_choose_mode(p);
385 mac_vmode_to_var(default_vmode, default_cmode, &p->info.var);
386 valkyrie_init_info(&p->info, p);
387 valkyrie_init_fix(&p->info.fix, p);
388 if (valkyriefb_set_par(&p->info))
389 /* "can't happen" */
390 printk(KERN_ERR "valkyriefb: can't set default video mode\n");
391
392 if ((err = register_framebuffer(&p->info)) != 0)
393 goto out_free;
394
395 printk(KERN_INFO "fb%d: valkyrie frame buffer device\n", p->info.node);
396 return 0;
397
398 out_free:
399 if (p->frame_buffer)
400 iounmap(p->frame_buffer);
401 if (p->cmap_regs)
402 iounmap(p->cmap_regs);
403 if (p->valkyrie_regs)
404 iounmap(p->valkyrie_regs);
405 kfree(p);
406 return err;
407}
408
409/*
410 * Get the monitor sense value.
411 */
412static int read_valkyrie_sense(struct fb_info_valkyrie *p)
413{
414 int sense, in;
415
416 out_8(&p->valkyrie_regs->msense.r, 0); /* release all lines */
417 __delay(20000);
418 sense = ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x70) << 4;
419 /* drive each sense line low in turn and collect the other 2 */
420 out_8(&p->valkyrie_regs->msense.r, 4); /* drive A low */
421 __delay(20000);
422 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x30);
423 out_8(&p->valkyrie_regs->msense.r, 2); /* drive B low */
424 __delay(20000);
425 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x40) >> 3;
426 sense |= (in & 0x10) >> 2;
427 out_8(&p->valkyrie_regs->msense.r, 1); /* drive C low */
428 __delay(20000);
429 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x60) >> 5;
430
431 out_8(&p->valkyrie_regs->msense.r, 7);
432
433 return sense;
434}
435
436/*
437 * This routine takes a user-supplied var,
438 * and picks the best vmode/cmode from it.
439 */
440
441/* [bkn] I did a major overhaul of this function.
442 *
443 * Much of the old code was "swiped by jonh from atyfb.c". Because
444 * macmodes has mac_var_to_vmode, I felt that it would be better to
445 * rework this function to use that, instead of reinventing the wheel to
446 * add support for vmode 17. This was reinforced by the fact that
447 * the previously swiped atyfb.c code is no longer there.
448 *
449 * So, I swiped and adapted platinum_var_to_par (from platinumfb.c), replacing
450 * most, but not all, of the old code in the process. One side benefit of
451 * swiping the platinumfb code is that we now have more comprehensible error
452 * messages when a vmode/cmode switch fails. (Most of the error messages are
453 * platinumfb.c, but I added two of my own, and I also changed some commas
454 * into colons to make the messages more consistent with other Linux error
455 * messages.) In addition, I think the new code *might* fix some vmode-
456 * switching oddities, but I'm not sure.
457 *
458 * There may be some more opportunities for cleanup in here, but this is a
459 * good start...
460 */
461
462static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
463 struct fb_par_valkyrie *par, const struct fb_info *fb_info)
464{
465 int vmode, cmode;
466 struct valkyrie_regvals *init;
467 struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) fb_info;
468
469 if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
470 printk(KERN_ERR "valkyriefb: can't do %dx%dx%d.\n",
471 var->xres, var->yres, var->bits_per_pixel);
472 return -EINVAL;
473 }
474
475 /* Check if we know about the wanted video mode */
476 if (vmode < 1 || vmode > VMODE_MAX || !valkyrie_reg_init[vmode-1]) {
477 printk(KERN_ERR "valkyriefb: vmode %d not valid.\n", vmode);
478 return -EINVAL;
479 }
480
481 if (cmode != CMODE_8 && cmode != CMODE_16) {
482 printk(KERN_ERR "valkyriefb: cmode %d not valid.\n", cmode);
483 return -EINVAL;
484 }
485
486 if (var->xres_virtual > var->xres || var->yres_virtual > var->yres
487 || var->xoffset != 0 || var->yoffset != 0) {
488 return -EINVAL;
489 }
490
491 init = valkyrie_reg_init[vmode-1];
492 if (init->pitch[cmode] == 0) {
493 printk(KERN_ERR "valkyriefb: vmode %d does not support "
494 "cmode %d.\n", vmode, cmode);
495 return -EINVAL;
496 }
497
498 if (valkyrie_vram_reqd(vmode, cmode) > p->total_vram) {
499 printk(KERN_ERR "valkyriefb: not enough ram for vmode %d, "
500 "cmode %d.\n", vmode, cmode);
501 return -EINVAL;
502 }
503
504 par->vmode = vmode;
505 par->cmode = cmode;
506 par->init = init;
507 par->xres = var->xres;
508 par->yres = var->yres;
509 par->vxres = par->xres;
510 par->vyres = par->yres;
511
512 return 0;
513}
514
515static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p)
516{
517 memset(fix, 0, sizeof(*fix));
518 strcpy(fix->id, "valkyrie");
519 fix->mmio_start = p->valkyrie_regs_phys;
520 fix->mmio_len = sizeof(struct valkyrie_regs);
521 fix->type = FB_TYPE_PACKED_PIXELS;
522 fix->smem_start = p->frame_buffer_phys + 0x1000;
523 fix->smem_len = p->total_vram;
524
525 fix->type_aux = 0;
526 fix->ywrapstep = 0;
527 fix->ypanstep = 0;
528 fix->xpanstep = 0;
529
530}
531
532/* Fix must already be inited above */
533static void valkyrie_par_to_fix(struct fb_par_valkyrie *par,
534 struct fb_fix_screeninfo *fix)
535{
536 fix->smem_len = valkyrie_vram_reqd(par->vmode, par->cmode);
537 fix->visual = (par->cmode == CMODE_8) ?
538 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
539 fix->line_length = par->vxres << par->cmode;
540 /* ywrapstep, xpanstep, ypanstep */
541}
542
543static void __init valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p)
544{
545 info->fbops = &valkyriefb_ops;
546 info->screen_base = p->frame_buffer + 0x1000;
547 info->flags = FBINFO_DEFAULT;
548 info->pseudo_palette = p->pseudo_palette;
549 fb_alloc_cmap(&info->cmap, 256, 0);
550 info->par = &p->par;
551}
552
553
554/*
555 * Parse user speficied options (`video=valkyriefb:')
556 */
557int __init valkyriefb_setup(char *options)
558{
559 char *this_opt;
560
561 if (!options || !*options)
562 return 0;
563
564 while ((this_opt = strsep(&options, ",")) != NULL) {
565 if (!strncmp(this_opt, "vmode:", 6)) {
566 int vmode = simple_strtoul(this_opt+6, NULL, 0);
567 if (vmode > 0 && vmode <= VMODE_MAX)
568 default_vmode = vmode;
569 }
570 else if (!strncmp(this_opt, "cmode:", 6)) {
571 int depth = simple_strtoul(this_opt+6, NULL, 0);
572 switch (depth) {
573 case 8:
574 default_cmode = CMODE_8;
575 break;
576 case 15:
577 case 16:
578 default_cmode = CMODE_16;
579 break;
580 }
581 }
582 }
583 return 0;
584}
585
586module_init(valkyriefb_init);
587MODULE_LICENSE("GPL");