2 * valkyriefb.c -- frame buffer device for the PowerMac 'valkyrie' display
4 * Created 8 August 1998 by
5 * Martin Costabel <costabel@wanadoo.fr> and Kevin Schoedel
7 * Vmode-switching changes and vmode 15/17 modifications created 29 August
8 * 1998 by Barry K. Nathan <barryn@pobox.com>.
10 * Ported to m68k Macintosh by David Huggins-Daines <dhd@debian.org>
12 * Derived directly from:
14 * controlfb.c -- frame buffer device for the PowerMac 'control' display
15 * Copyright (C) 1998 Dan Jacobowitz <dan@debian.org>
17 * pmc-valkyrie.c -- Console support for PowerMac "valkyrie" display adaptor.
18 * Copyright (C) 1997 Paul Mackerras.
22 * Frame buffer structure from:
23 * drivers/video/chipsfb.c -- frame buffer device for
24 * Chips & Technologies 65550 chip.
26 * Copyright (C) 1998 Paul Mackerras
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.
33 * Hardware information from:
34 * control.c: Console support for PowerMac "control" display adaptor.
35 * Copyright (C) 1996 Paul Mackerras
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
42 #include <linux/module.h>
43 #include <linux/kernel.h>
44 #include <linux/errno.h>
45 #include <linux/string.h>
47 #include <linux/slab.h>
48 #include <linux/vmalloc.h>
49 #include <linux/delay.h>
50 #include <linux/interrupt.h>
52 #include <linux/selection.h>
53 #include <linux/init.h>
54 #include <linux/nvram.h>
55 #include <linux/adb.h>
56 #include <linux/cuda.h>
59 #include <asm/bootinfo.h>
60 #include <asm/macintosh.h>
64 #include <asm/pgtable.h>
67 #include "valkyriefb.h"
70 /* We don't yet have functions to read the PRAM... perhaps we can
71 adapt them from the PPC code? */
72 static int default_vmode
= VMODE_640_480_67
;
73 static int default_cmode
= CMODE_8
;
75 static int default_vmode
= VMODE_NVRAM
;
76 static int default_cmode
= CMODE_NVRAM
;
79 struct fb_par_valkyrie
{
83 struct valkyrie_regvals
*init
;
86 struct fb_info_valkyrie
{
88 struct fb_par_valkyrie par
;
89 struct cmap_regs __iomem
*cmap_regs
;
90 unsigned long cmap_regs_phys
;
92 struct valkyrie_regs __iomem
*valkyrie_regs
;
93 unsigned long valkyrie_regs_phys
;
95 __u8 __iomem
*frame_buffer
;
96 unsigned long frame_buffer_phys
;
99 unsigned long total_vram
;
101 u32 pseudo_palette
[16];
107 int valkyriefb_init(void);
108 int valkyriefb_setup(char*);
110 static int valkyriefb_check_var(struct fb_var_screeninfo
*var
,
111 struct fb_info
*info
);
112 static int valkyriefb_set_par(struct fb_info
*info
);
113 static int valkyriefb_setcolreg(u_int regno
, u_int red
, u_int green
, u_int blue
,
114 u_int transp
, struct fb_info
*info
);
115 static int valkyriefb_blank(int blank_mode
, struct fb_info
*info
);
117 static int read_valkyrie_sense(struct fb_info_valkyrie
*p
);
118 static void set_valkyrie_clock(unsigned char *params
);
119 static int valkyrie_var_to_par(struct fb_var_screeninfo
*var
,
120 struct fb_par_valkyrie
*par
, const struct fb_info
*fb_info
);
122 static void valkyrie_init_info(struct fb_info
*info
, struct fb_info_valkyrie
*p
);
123 static void valkyrie_par_to_fix(struct fb_par_valkyrie
*par
, struct fb_fix_screeninfo
*fix
);
124 static void valkyrie_init_fix(struct fb_fix_screeninfo
*fix
, struct fb_info_valkyrie
*p
);
126 static struct fb_ops valkyriefb_ops
= {
127 .owner
= THIS_MODULE
,
128 .fb_check_var
= valkyriefb_check_var
,
129 .fb_set_par
= valkyriefb_set_par
,
130 .fb_setcolreg
= valkyriefb_setcolreg
,
131 .fb_blank
= valkyriefb_blank
,
132 .fb_fillrect
= cfb_fillrect
,
133 .fb_copyarea
= cfb_copyarea
,
134 .fb_imageblit
= cfb_imageblit
,
137 /* Sets the video mode according to info->var */
138 static int valkyriefb_set_par(struct fb_info
*info
)
140 struct fb_info_valkyrie
*p
= (struct fb_info_valkyrie
*) info
;
141 volatile struct valkyrie_regs __iomem
*valkyrie_regs
= p
->valkyrie_regs
;
142 struct fb_par_valkyrie
*par
= info
->par
;
143 struct valkyrie_regvals
*init
;
146 if ((err
= valkyrie_var_to_par(&info
->var
, par
, info
)))
149 valkyrie_par_to_fix(par
, &info
->fix
);
151 /* Reset the valkyrie */
152 out_8(&valkyrie_regs
->status
.r
, 0);
155 /* Initialize display timing registers */
157 out_8(&valkyrie_regs
->mode
.r
, init
->mode
| 0x80);
158 out_8(&valkyrie_regs
->depth
.r
, par
->cmode
+ 3);
159 set_valkyrie_clock(init
->clock_params
);
162 /* Turn on display */
163 out_8(&valkyrie_regs
->mode
.r
, init
->mode
);
168 static inline int valkyrie_par_to_var(struct fb_par_valkyrie
*par
,
169 struct fb_var_screeninfo
*var
)
171 return mac_vmode_to_var(par
->vmode
, par
->cmode
, var
);
175 valkyriefb_check_var(struct fb_var_screeninfo
*var
, struct fb_info
*info
)
178 struct fb_par_valkyrie par
;
180 if ((err
= valkyrie_var_to_par(var
, &par
, info
)))
182 valkyrie_par_to_var(&par
, var
);
187 * Blank the screen if blank_mode != 0, else unblank. If blank_mode == NULL
188 * then the caller blanks by setting the CLUT (Color Look Up Table) to all
189 * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
190 * to e.g. a video mode which doesn't support it. Implements VESA suspend
191 * and powerdown modes on hardware that supports disabling hsync/vsync:
192 * blank_mode == 2: suspend vsync
193 * blank_mode == 3: suspend hsync
194 * blank_mode == 4: powerdown
196 static int valkyriefb_blank(int blank_mode
, struct fb_info
*info
)
198 struct fb_info_valkyrie
*p
= (struct fb_info_valkyrie
*) info
;
199 struct fb_par_valkyrie
*par
= info
->par
;
200 struct valkyrie_regvals
*init
= par
->init
;
205 switch (blank_mode
) {
206 case FB_BLANK_UNBLANK
: /* unblank */
207 out_8(&p
->valkyrie_regs
->mode
.r
, init
->mode
);
209 case FB_BLANK_NORMAL
:
210 return 1; /* get caller to set CLUT to all black */
211 case FB_BLANK_VSYNC_SUSPEND
:
212 case FB_BLANK_HSYNC_SUSPEND
:
214 * [kps] Value extracted from MacOS. I don't know
215 * whether this bit disables hsync or vsync, or
216 * whether the hardware can do the other as well.
218 out_8(&p
->valkyrie_regs
->mode
.r
, init
->mode
| 0x40);
220 case FB_BLANK_POWERDOWN
:
221 out_8(&p
->valkyrie_regs
->mode
.r
, 0x66);
227 static int valkyriefb_setcolreg(u_int regno
, u_int red
, u_int green
, u_int blue
,
228 u_int transp
, struct fb_info
*info
)
230 struct fb_info_valkyrie
*p
= (struct fb_info_valkyrie
*) info
;
231 volatile struct cmap_regs __iomem
*cmap_regs
= p
->cmap_regs
;
232 struct fb_par_valkyrie
*par
= info
->par
;
240 /* tell clut which address to fill */
241 out_8(&p
->cmap_regs
->addr
, regno
);
243 /* send one color channel at a time */
244 out_8(&cmap_regs
->lut
, red
);
245 out_8(&cmap_regs
->lut
, green
);
246 out_8(&cmap_regs
->lut
, blue
);
248 if (regno
< 16 && par
->cmode
== CMODE_16
)
249 ((u32
*)info
->pseudo_palette
)[regno
] =
250 (regno
<< 10) | (regno
<< 5) | regno
;
255 static inline int valkyrie_vram_reqd(int video_mode
, int color_mode
)
258 struct valkyrie_regvals
*init
= valkyrie_reg_init
[video_mode
-1];
260 if ((pitch
= init
->pitch
[color_mode
]) == 0)
261 pitch
= 2 * init
->pitch
[0];
262 return init
->vres
* pitch
;
265 static void set_valkyrie_clock(unsigned char *params
)
267 struct adb_request req
;
270 #ifdef CONFIG_ADB_CUDA
271 for (i
= 0; i
< 3; ++i
) {
272 cuda_request(&req
, NULL
, 5, CUDA_PACKET
, CUDA_GET_SET_IIC
,
273 0x50, i
+ 1, params
[i
]);
274 while (!req
.complete
)
280 static void __init
valkyrie_choose_mode(struct fb_info_valkyrie
*p
)
282 p
->sense
= read_valkyrie_sense(p
);
283 printk(KERN_INFO
"Monitor sense value = 0x%x\n", p
->sense
);
285 /* Try to pick a video mode out of NVRAM if we have one. */
286 #if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
287 if (default_vmode
== VMODE_NVRAM
) {
288 default_vmode
= nvram_read_byte(NV_VMODE
);
289 if (default_vmode
<= 0
290 || default_vmode
> VMODE_MAX
291 || !valkyrie_reg_init
[default_vmode
- 1])
292 default_vmode
= VMODE_CHOOSE
;
295 if (default_vmode
== VMODE_CHOOSE
)
296 default_vmode
= mac_map_monitor_sense(p
->sense
);
297 if (!valkyrie_reg_init
[default_vmode
- 1])
298 default_vmode
= VMODE_640_480_67
;
299 #if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
300 if (default_cmode
== CMODE_NVRAM
)
301 default_cmode
= nvram_read_byte(NV_CMODE
);
305 * Reduce the pixel size if we don't have enough VRAM or bandwidth.
307 if (default_cmode
< CMODE_8
|| default_cmode
> CMODE_16
308 || valkyrie_reg_init
[default_vmode
-1]->pitch
[default_cmode
] == 0
309 || valkyrie_vram_reqd(default_vmode
, default_cmode
) > p
->total_vram
)
310 default_cmode
= CMODE_8
;
312 printk(KERN_INFO
"using video mode %d and color mode %d.\n",
313 default_vmode
, default_cmode
);
316 int __init
valkyriefb_init(void)
318 struct fb_info_valkyrie
*p
;
319 unsigned long frame_buffer_phys
, cmap_regs_phys
, flags
;
323 if (fb_get_options("valkyriefb", &option
))
325 valkyriefb_setup(option
);
330 if (!(mac_bi_data
.id
== MAC_MODEL_Q630
331 /* I'm not sure about this one */
332 || mac_bi_data
.id
== MAC_MODEL_P588
))
335 /* Hardcoded addresses... welcome to 68k Macintosh country :-) */
336 frame_buffer_phys
= 0xf9000000;
337 cmap_regs_phys
= 0x50f24000;
338 flags
= IOMAP_NOCACHE_SER
; /* IOMAP_WRITETHROUGH?? */
339 #else /* ppc (!CONFIG_MAC) */
341 struct device_node
*dp
;
344 dp
= of_find_node_by_name(NULL
, "valkyrie");
348 if (of_address_to_resource(dp
, 0, &r
)) {
349 printk(KERN_ERR
"can't find address for valkyrie\n");
353 frame_buffer_phys
= r
.start
;
354 cmap_regs_phys
= r
.start
+ 0x304000;
355 flags
= _PAGE_WRITETHRU
;
357 #endif /* ppc (!CONFIG_MAC) */
359 p
= kmalloc(sizeof(*p
), GFP_ATOMIC
);
362 memset(p
, 0, sizeof(*p
));
364 /* Map in frame buffer and registers */
365 if (!request_mem_region(frame_buffer_phys
, 0x100000, "valkyriefb")) {
369 p
->total_vram
= 0x100000;
370 p
->frame_buffer_phys
= frame_buffer_phys
;
371 p
->frame_buffer
= __ioremap(frame_buffer_phys
, p
->total_vram
, flags
);
372 p
->cmap_regs_phys
= cmap_regs_phys
;
373 p
->cmap_regs
= ioremap(p
->cmap_regs_phys
, 0x1000);
374 p
->valkyrie_regs_phys
= cmap_regs_phys
+0x6000;
375 p
->valkyrie_regs
= ioremap(p
->valkyrie_regs_phys
, 0x1000);
377 if (p
->frame_buffer
== NULL
|| p
->cmap_regs
== NULL
378 || p
->valkyrie_regs
== NULL
) {
379 printk(KERN_ERR
"valkyriefb: couldn't map resources\n");
383 valkyrie_choose_mode(p
);
384 mac_vmode_to_var(default_vmode
, default_cmode
, &p
->info
.var
);
385 valkyrie_init_info(&p
->info
, p
);
386 valkyrie_init_fix(&p
->info
.fix
, p
);
387 if (valkyriefb_set_par(&p
->info
))
389 printk(KERN_ERR
"valkyriefb: can't set default video mode\n");
391 if ((err
= register_framebuffer(&p
->info
)) != 0)
394 printk(KERN_INFO
"fb%d: valkyrie frame buffer device\n", p
->info
.node
);
399 iounmap(p
->frame_buffer
);
401 iounmap(p
->cmap_regs
);
402 if (p
->valkyrie_regs
)
403 iounmap(p
->valkyrie_regs
);
409 * Get the monitor sense value.
411 static int read_valkyrie_sense(struct fb_info_valkyrie
*p
)
415 out_8(&p
->valkyrie_regs
->msense
.r
, 0); /* release all lines */
417 sense
= ((in
= in_8(&p
->valkyrie_regs
->msense
.r
)) & 0x70) << 4;
418 /* drive each sense line low in turn and collect the other 2 */
419 out_8(&p
->valkyrie_regs
->msense
.r
, 4); /* drive A low */
421 sense
|= ((in
= in_8(&p
->valkyrie_regs
->msense
.r
)) & 0x30);
422 out_8(&p
->valkyrie_regs
->msense
.r
, 2); /* drive B low */
424 sense
|= ((in
= in_8(&p
->valkyrie_regs
->msense
.r
)) & 0x40) >> 3;
425 sense
|= (in
& 0x10) >> 2;
426 out_8(&p
->valkyrie_regs
->msense
.r
, 1); /* drive C low */
428 sense
|= ((in
= in_8(&p
->valkyrie_regs
->msense
.r
)) & 0x60) >> 5;
430 out_8(&p
->valkyrie_regs
->msense
.r
, 7);
436 * This routine takes a user-supplied var,
437 * and picks the best vmode/cmode from it.
440 /* [bkn] I did a major overhaul of this function.
442 * Much of the old code was "swiped by jonh from atyfb.c". Because
443 * macmodes has mac_var_to_vmode, I felt that it would be better to
444 * rework this function to use that, instead of reinventing the wheel to
445 * add support for vmode 17. This was reinforced by the fact that
446 * the previously swiped atyfb.c code is no longer there.
448 * So, I swiped and adapted platinum_var_to_par (from platinumfb.c), replacing
449 * most, but not all, of the old code in the process. One side benefit of
450 * swiping the platinumfb code is that we now have more comprehensible error
451 * messages when a vmode/cmode switch fails. (Most of the error messages are
452 * platinumfb.c, but I added two of my own, and I also changed some commas
453 * into colons to make the messages more consistent with other Linux error
454 * messages.) In addition, I think the new code *might* fix some vmode-
455 * switching oddities, but I'm not sure.
457 * There may be some more opportunities for cleanup in here, but this is a
461 static int valkyrie_var_to_par(struct fb_var_screeninfo
*var
,
462 struct fb_par_valkyrie
*par
, const struct fb_info
*fb_info
)
465 struct valkyrie_regvals
*init
;
466 struct fb_info_valkyrie
*p
= (struct fb_info_valkyrie
*) fb_info
;
468 if (mac_var_to_vmode(var
, &vmode
, &cmode
) != 0) {
469 printk(KERN_ERR
"valkyriefb: can't do %dx%dx%d.\n",
470 var
->xres
, var
->yres
, var
->bits_per_pixel
);
474 /* Check if we know about the wanted video mode */
475 if (vmode
< 1 || vmode
> VMODE_MAX
|| !valkyrie_reg_init
[vmode
-1]) {
476 printk(KERN_ERR
"valkyriefb: vmode %d not valid.\n", vmode
);
480 if (cmode
!= CMODE_8
&& cmode
!= CMODE_16
) {
481 printk(KERN_ERR
"valkyriefb: cmode %d not valid.\n", cmode
);
485 if (var
->xres_virtual
> var
->xres
|| var
->yres_virtual
> var
->yres
486 || var
->xoffset
!= 0 || var
->yoffset
!= 0) {
490 init
= valkyrie_reg_init
[vmode
-1];
491 if (init
->pitch
[cmode
] == 0) {
492 printk(KERN_ERR
"valkyriefb: vmode %d does not support "
493 "cmode %d.\n", vmode
, cmode
);
497 if (valkyrie_vram_reqd(vmode
, cmode
) > p
->total_vram
) {
498 printk(KERN_ERR
"valkyriefb: not enough ram for vmode %d, "
499 "cmode %d.\n", vmode
, cmode
);
506 par
->xres
= var
->xres
;
507 par
->yres
= var
->yres
;
508 par
->vxres
= par
->xres
;
509 par
->vyres
= par
->yres
;
514 static void valkyrie_init_fix(struct fb_fix_screeninfo
*fix
, struct fb_info_valkyrie
*p
)
516 memset(fix
, 0, sizeof(*fix
));
517 strcpy(fix
->id
, "valkyrie");
518 fix
->mmio_start
= p
->valkyrie_regs_phys
;
519 fix
->mmio_len
= sizeof(struct valkyrie_regs
);
520 fix
->type
= FB_TYPE_PACKED_PIXELS
;
521 fix
->smem_start
= p
->frame_buffer_phys
+ 0x1000;
522 fix
->smem_len
= p
->total_vram
;
531 /* Fix must already be inited above */
532 static void valkyrie_par_to_fix(struct fb_par_valkyrie
*par
,
533 struct fb_fix_screeninfo
*fix
)
535 fix
->smem_len
= valkyrie_vram_reqd(par
->vmode
, par
->cmode
);
536 fix
->visual
= (par
->cmode
== CMODE_8
) ?
537 FB_VISUAL_PSEUDOCOLOR
: FB_VISUAL_DIRECTCOLOR
;
538 fix
->line_length
= par
->vxres
<< par
->cmode
;
539 /* ywrapstep, xpanstep, ypanstep */
542 static void __init
valkyrie_init_info(struct fb_info
*info
, struct fb_info_valkyrie
*p
)
544 info
->fbops
= &valkyriefb_ops
;
545 info
->screen_base
= p
->frame_buffer
+ 0x1000;
546 info
->flags
= FBINFO_DEFAULT
;
547 info
->pseudo_palette
= p
->pseudo_palette
;
548 fb_alloc_cmap(&info
->cmap
, 256, 0);
554 * Parse user speficied options (`video=valkyriefb:')
556 int __init
valkyriefb_setup(char *options
)
560 if (!options
|| !*options
)
563 while ((this_opt
= strsep(&options
, ",")) != NULL
) {
564 if (!strncmp(this_opt
, "vmode:", 6)) {
565 int vmode
= simple_strtoul(this_opt
+6, NULL
, 0);
566 if (vmode
> 0 && vmode
<= VMODE_MAX
)
567 default_vmode
= vmode
;
569 else if (!strncmp(this_opt
, "cmode:", 6)) {
570 int depth
= simple_strtoul(this_opt
+6, NULL
, 0);
573 default_cmode
= CMODE_8
;
577 default_cmode
= CMODE_16
;
585 module_init(valkyriefb_init
);
586 MODULE_LICENSE("GPL");
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