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/pci.h>
55 #include <linux/nvram.h>
56 #include <linux/adb.h>
57 #include <linux/cuda.h>
60 #include <asm/bootinfo.h>
61 #include <asm/macintosh.h>
65 #include <asm/pgtable.h>
68 #include "valkyriefb.h"
71 /* We don't yet have functions to read the PRAM... perhaps we can
72 adapt them from the PPC code? */
73 static int default_vmode
= VMODE_640_480_67
;
74 static int default_cmode
= CMODE_8
;
76 static int default_vmode
= VMODE_NVRAM
;
77 static int default_cmode
= CMODE_NVRAM
;
80 struct fb_par_valkyrie
{
84 struct valkyrie_regvals
*init
;
87 struct fb_info_valkyrie
{
89 struct fb_par_valkyrie par
;
90 struct cmap_regs __iomem
*cmap_regs
;
91 unsigned long cmap_regs_phys
;
93 struct valkyrie_regs __iomem
*valkyrie_regs
;
94 unsigned long valkyrie_regs_phys
;
96 __u8 __iomem
*frame_buffer
;
97 unsigned long frame_buffer_phys
;
100 unsigned long total_vram
;
102 u32 pseudo_palette
[16];
108 int valkyriefb_init(void);
109 int valkyriefb_setup(char*);
111 static int valkyriefb_check_var(struct fb_var_screeninfo
*var
,
112 struct fb_info
*info
);
113 static int valkyriefb_set_par(struct fb_info
*info
);
114 static int valkyriefb_setcolreg(u_int regno
, u_int red
, u_int green
, u_int blue
,
115 u_int transp
, struct fb_info
*info
);
116 static int valkyriefb_blank(int blank_mode
, struct fb_info
*info
);
118 static int read_valkyrie_sense(struct fb_info_valkyrie
*p
);
119 static void set_valkyrie_clock(unsigned char *params
);
120 static int valkyrie_var_to_par(struct fb_var_screeninfo
*var
,
121 struct fb_par_valkyrie
*par
, const struct fb_info
*fb_info
);
123 static void valkyrie_init_info(struct fb_info
*info
, struct fb_info_valkyrie
*p
);
124 static void valkyrie_par_to_fix(struct fb_par_valkyrie
*par
, struct fb_fix_screeninfo
*fix
);
125 static void valkyrie_init_fix(struct fb_fix_screeninfo
*fix
, struct fb_info_valkyrie
*p
);
127 static 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
,
138 /* Sets the video mode according to info->var */
139 static int valkyriefb_set_par(struct fb_info
*info
)
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
;
147 if ((err
= valkyrie_var_to_par(&info
->var
, par
, info
)))
150 valkyrie_par_to_fix(par
, &info
->fix
);
152 /* Reset the valkyrie */
153 out_8(&valkyrie_regs
->status
.r
, 0);
156 /* Initialize display timing registers */
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
);
163 /* Turn on display */
164 out_8(&valkyrie_regs
->mode
.r
, init
->mode
);
169 static inline int valkyrie_par_to_var(struct fb_par_valkyrie
*par
,
170 struct fb_var_screeninfo
*var
)
172 return mac_vmode_to_var(par
->vmode
, par
->cmode
, var
);
176 valkyriefb_check_var(struct fb_var_screeninfo
*var
, struct fb_info
*info
)
179 struct fb_par_valkyrie par
;
181 if ((err
= valkyrie_var_to_par(var
, &par
, info
)))
183 valkyrie_par_to_var(&par
, var
);
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
197 static int valkyriefb_blank(int blank_mode
, struct fb_info
*info
)
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
;
206 switch (blank_mode
) {
207 case FB_BLANK_UNBLANK
: /* unblank */
208 out_8(&p
->valkyrie_regs
->mode
.r
, init
->mode
);
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
:
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.
219 out_8(&p
->valkyrie_regs
->mode
.r
, init
->mode
| 0x40);
221 case FB_BLANK_POWERDOWN
:
222 out_8(&p
->valkyrie_regs
->mode
.r
, 0x66);
228 static int valkyriefb_setcolreg(u_int regno
, u_int red
, u_int green
, u_int blue
,
229 u_int transp
, struct fb_info
*info
)
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
;
241 /* tell clut which address to fill */
242 out_8(&p
->cmap_regs
->addr
, regno
);
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
);
249 if (regno
< 16 && par
->cmode
== CMODE_16
)
250 ((u32
*)info
->pseudo_palette
)[regno
] =
251 (regno
<< 10) | (regno
<< 5) | regno
;
256 static inline int valkyrie_vram_reqd(int video_mode
, int color_mode
)
259 struct valkyrie_regvals
*init
= valkyrie_reg_init
[video_mode
-1];
261 if ((pitch
= init
->pitch
[color_mode
]) == 0)
262 pitch
= 2 * init
->pitch
[0];
263 return init
->vres
* pitch
;
266 static void set_valkyrie_clock(unsigned char *params
)
268 struct adb_request req
;
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
)
281 static void __init
valkyrie_choose_mode(struct fb_info_valkyrie
*p
)
283 p
->sense
= read_valkyrie_sense(p
);
284 printk(KERN_INFO
"Monitor sense value = 0x%x\n", p
->sense
);
286 /* Try to pick a video mode out of NVRAM if we have one. */
288 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
;
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
;
301 if (default_cmode
== CMODE_NVRAM
)
302 default_cmode
= nvram_read_byte(NV_CMODE
);
306 * Reduce the pixel size if we don't have enough VRAM or bandwidth.
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
;
313 printk(KERN_INFO
"using video mode %d and color mode %d.\n",
314 default_vmode
, default_cmode
);
317 int __init
valkyriefb_init(void)
319 struct fb_info_valkyrie
*p
;
320 unsigned long frame_buffer_phys
, cmap_regs_phys
, flags
;
324 if (fb_get_options("valkyriefb", &option
))
326 valkyriefb_setup(option
);
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
))
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) */
342 struct device_node
*dp
;
345 dp
= of_find_node_by_name(NULL
, "valkyrie");
349 if (of_address_to_resource(dp
, 0, &r
)) {
350 printk(KERN_ERR
"can't find address for valkyrie\n");
354 frame_buffer_phys
= r
.start
;
355 cmap_regs_phys
= r
.start
+ 0x304000;
356 flags
= _PAGE_WRITETHRU
;
358 #endif /* ppc (!CONFIG_MAC) */
360 p
= kmalloc(sizeof(*p
), GFP_ATOMIC
);
363 memset(p
, 0, sizeof(*p
));
365 /* Map in frame buffer and registers */
366 if (!request_mem_region(frame_buffer_phys
, 0x100000, "valkyriefb")) {
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);
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");
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
))
390 printk(KERN_ERR
"valkyriefb: can't set default video mode\n");
392 if ((err
= register_framebuffer(&p
->info
)) != 0)
395 printk(KERN_INFO
"fb%d: valkyrie frame buffer device\n", p
->info
.node
);
400 iounmap(p
->frame_buffer
);
402 iounmap(p
->cmap_regs
);
403 if (p
->valkyrie_regs
)
404 iounmap(p
->valkyrie_regs
);
410 * Get the monitor sense value.
412 static int read_valkyrie_sense(struct fb_info_valkyrie
*p
)
416 out_8(&p
->valkyrie_regs
->msense
.r
, 0); /* release all lines */
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 */
422 sense
|= ((in
= in_8(&p
->valkyrie_regs
->msense
.r
)) & 0x30);
423 out_8(&p
->valkyrie_regs
->msense
.r
, 2); /* drive B low */
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 */
429 sense
|= ((in
= in_8(&p
->valkyrie_regs
->msense
.r
)) & 0x60) >> 5;
431 out_8(&p
->valkyrie_regs
->msense
.r
, 7);
437 * This routine takes a user-supplied var,
438 * and picks the best vmode/cmode from it.
441 /* [bkn] I did a major overhaul of this function.
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.
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.
458 * There may be some more opportunities for cleanup in here, but this is a
462 static int valkyrie_var_to_par(struct fb_var_screeninfo
*var
,
463 struct fb_par_valkyrie
*par
, const struct fb_info
*fb_info
)
466 struct valkyrie_regvals
*init
;
467 struct fb_info_valkyrie
*p
= (struct fb_info_valkyrie
*) fb_info
;
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
);
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
);
481 if (cmode
!= CMODE_8
&& cmode
!= CMODE_16
) {
482 printk(KERN_ERR
"valkyriefb: cmode %d not valid.\n", cmode
);
486 if (var
->xres_virtual
> var
->xres
|| var
->yres_virtual
> var
->yres
487 || var
->xoffset
!= 0 || var
->yoffset
!= 0) {
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
);
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
);
507 par
->xres
= var
->xres
;
508 par
->yres
= var
->yres
;
509 par
->vxres
= par
->xres
;
510 par
->vyres
= par
->yres
;
515 static void valkyrie_init_fix(struct fb_fix_screeninfo
*fix
, struct fb_info_valkyrie
*p
)
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
;
532 /* Fix must already be inited above */
533 static void valkyrie_par_to_fix(struct fb_par_valkyrie
*par
,
534 struct fb_fix_screeninfo
*fix
)
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 */
543 static void __init
valkyrie_init_info(struct fb_info
*info
, struct fb_info_valkyrie
*p
)
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);
555 * Parse user speficied options (`video=valkyriefb:')
557 int __init
valkyriefb_setup(char *options
)
561 if (!options
|| !*options
)
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
;
570 else if (!strncmp(this_opt
, "cmode:", 6)) {
571 int depth
= simple_strtoul(this_opt
+6, NULL
, 0);
574 default_cmode
= CMODE_8
;
578 default_cmode
= CMODE_16
;
586 module_init(valkyriefb_init
);
587 MODULE_LICENSE("GPL");
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