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>
57 #include <linux/of_address.h>
59 #include <asm/macintosh.h>
63 #include "valkyriefb.h"
65 static int default_vmode = VMODE_NVRAM;
66 static int default_cmode = CMODE_NVRAM;
68 struct fb_par_valkyrie {
72 struct valkyrie_regvals *init;
75 struct fb_info_valkyrie {
77 struct fb_par_valkyrie par;
78 struct cmap_regs __iomem *cmap_regs;
79 unsigned long cmap_regs_phys;
81 struct valkyrie_regs __iomem *valkyrie_regs;
82 unsigned long valkyrie_regs_phys;
84 __u8 __iomem *frame_buffer;
85 unsigned long frame_buffer_phys;
88 unsigned long total_vram;
90 u32 pseudo_palette[16];
96 int valkyriefb_init(void);
97 int valkyriefb_setup(char*);
99 static int valkyriefb_check_var(struct fb_var_screeninfo *var,
100 struct fb_info *info);
101 static int valkyriefb_set_par(struct fb_info *info);
102 static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
103 u_int transp, struct fb_info *info);
104 static int valkyriefb_blank(int blank_mode, struct fb_info *info);
106 static int read_valkyrie_sense(struct fb_info_valkyrie *p);
107 static void set_valkyrie_clock(unsigned char *params);
108 static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
109 struct fb_par_valkyrie *par, const struct fb_info *fb_info);
111 static int valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p);
112 static void valkyrie_par_to_fix(struct fb_par_valkyrie *par, struct fb_fix_screeninfo *fix);
113 static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p);
115 static const struct fb_ops valkyriefb_ops = {
116 .owner = THIS_MODULE,
117 .fb_check_var = valkyriefb_check_var,
118 .fb_set_par = valkyriefb_set_par,
119 .fb_setcolreg = valkyriefb_setcolreg,
120 .fb_blank = valkyriefb_blank,
121 .fb_fillrect = cfb_fillrect,
122 .fb_copyarea = cfb_copyarea,
123 .fb_imageblit = cfb_imageblit,
126 /* Sets the video mode according to info->var */
127 static int valkyriefb_set_par(struct fb_info *info)
129 struct fb_info_valkyrie *p =
130 container_of(info, struct fb_info_valkyrie, info);
131 volatile struct valkyrie_regs __iomem *valkyrie_regs = p->valkyrie_regs;
132 struct fb_par_valkyrie *par = info->par;
133 struct valkyrie_regvals *init;
136 if ((err = valkyrie_var_to_par(&info->var, par, info)))
139 valkyrie_par_to_fix(par, &info->fix);
141 /* Reset the valkyrie */
142 out_8(&valkyrie_regs->status.r, 0);
145 /* Initialize display timing registers */
147 out_8(&valkyrie_regs->mode.r, init->mode | 0x80);
148 out_8(&valkyrie_regs->depth.r, par->cmode + 3);
149 set_valkyrie_clock(init->clock_params);
152 /* Turn on display */
153 out_8(&valkyrie_regs->mode.r, init->mode);
158 static inline int valkyrie_par_to_var(struct fb_par_valkyrie *par,
159 struct fb_var_screeninfo *var)
161 return mac_vmode_to_var(par->vmode, par->cmode, var);
165 valkyriefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
168 struct fb_par_valkyrie par;
170 if ((err = valkyrie_var_to_par(var, &par, info)))
172 valkyrie_par_to_var(&par, var);
177 * Blank the screen if blank_mode != 0, else unblank. If blank_mode == NULL
178 * then the caller blanks by setting the CLUT (Color Look Up Table) to all
179 * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
180 * to e.g. a video mode which doesn't support it. Implements VESA suspend
181 * and powerdown modes on hardware that supports disabling hsync/vsync:
182 * blank_mode == 2: suspend vsync
183 * blank_mode == 3: suspend hsync
184 * blank_mode == 4: powerdown
186 static int valkyriefb_blank(int blank_mode, struct fb_info *info)
188 struct fb_info_valkyrie *p =
189 container_of(info, struct fb_info_valkyrie, info);
190 struct fb_par_valkyrie *par = info->par;
191 struct valkyrie_regvals *init = par->init;
196 switch (blank_mode) {
197 case FB_BLANK_UNBLANK: /* unblank */
198 out_8(&p->valkyrie_regs->mode.r, init->mode);
200 case FB_BLANK_NORMAL:
201 return 1; /* get caller to set CLUT to all black */
202 case FB_BLANK_VSYNC_SUSPEND:
203 case FB_BLANK_HSYNC_SUSPEND:
205 * [kps] Value extracted from MacOS. I don't know
206 * whether this bit disables hsync or vsync, or
207 * whether the hardware can do the other as well.
209 out_8(&p->valkyrie_regs->mode.r, init->mode | 0x40);
211 case FB_BLANK_POWERDOWN:
212 out_8(&p->valkyrie_regs->mode.r, 0x66);
218 static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
219 u_int transp, struct fb_info *info)
221 struct fb_info_valkyrie *p =
222 container_of(info, struct fb_info_valkyrie, info);
223 volatile struct cmap_regs __iomem *cmap_regs = p->cmap_regs;
224 struct fb_par_valkyrie *par = info->par;
232 /* tell clut which address to fill */
233 out_8(&p->cmap_regs->addr, regno);
235 /* send one color channel at a time */
236 out_8(&cmap_regs->lut, red);
237 out_8(&cmap_regs->lut, green);
238 out_8(&cmap_regs->lut, blue);
240 if (regno < 16 && par->cmode == CMODE_16)
241 ((u32 *)info->pseudo_palette)[regno] =
242 (regno << 10) | (regno << 5) | regno;
247 static inline int valkyrie_vram_reqd(int video_mode, int color_mode)
250 struct valkyrie_regvals *init = valkyrie_reg_init[video_mode-1];
252 if ((pitch = init->pitch[color_mode]) == 0)
253 pitch = 2 * init->pitch[0];
254 return init->vres * pitch;
257 static void set_valkyrie_clock(unsigned char *params)
259 #ifdef CONFIG_ADB_CUDA
260 struct adb_request req;
263 for (i = 0; i < 3; ++i) {
264 cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
265 0x50, i + 1, params[i]);
266 while (!req.complete)
272 static void __init valkyrie_choose_mode(struct fb_info_valkyrie *p)
274 p->sense = read_valkyrie_sense(p);
275 printk(KERN_INFO "Monitor sense value = 0x%x\n", p->sense);
277 /* Try to pick a video mode out of NVRAM if we have one. */
278 #ifdef CONFIG_PPC_PMAC
279 if (IS_REACHABLE(CONFIG_NVRAM) && default_vmode == VMODE_NVRAM)
280 default_vmode = nvram_read_byte(NV_VMODE);
282 if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
283 !valkyrie_reg_init[default_vmode - 1]) {
284 default_vmode = mac_map_monitor_sense(p->sense);
285 if (!valkyrie_reg_init[default_vmode - 1])
286 default_vmode = VMODE_640_480_67;
289 #ifdef CONFIG_PPC_PMAC
290 if (IS_REACHABLE(CONFIG_NVRAM) && default_cmode == CMODE_NVRAM)
291 default_cmode = nvram_read_byte(NV_CMODE);
294 * Reduce the pixel size if we don't have enough VRAM or bandwidth.
296 if (default_cmode < CMODE_8 || default_cmode > CMODE_16
297 || valkyrie_reg_init[default_vmode-1]->pitch[default_cmode] == 0
298 || valkyrie_vram_reqd(default_vmode, default_cmode) > p->total_vram)
299 default_cmode = CMODE_8;
301 printk(KERN_INFO "using video mode %d and color mode %d.\n",
302 default_vmode, default_cmode);
305 int __init valkyriefb_init(void)
307 struct fb_info_valkyrie *p;
308 unsigned long frame_buffer_phys, cmap_regs_phys;
312 if (fb_get_options("valkyriefb", &option))
314 valkyriefb_setup(option);
319 if (!(mac_bi_data.id == MAC_MODEL_Q630
320 /* I'm not sure about this one */
321 || mac_bi_data.id == MAC_MODEL_P588))
324 /* Hardcoded addresses... welcome to 68k Macintosh country :-) */
325 frame_buffer_phys = 0xf9000000;
326 cmap_regs_phys = 0x50f24000;
327 #else /* ppc (!CONFIG_MAC) */
329 struct device_node *dp;
332 dp = of_find_node_by_name(NULL, "valkyrie");
336 if (of_address_to_resource(dp, 0, &r)) {
337 printk(KERN_ERR "can't find address for valkyrie\n");
341 frame_buffer_phys = r.start;
342 cmap_regs_phys = r.start + 0x304000;
344 #endif /* ppc (!CONFIG_MAC) */
346 p = kzalloc(sizeof(*p), GFP_ATOMIC);
350 /* Map in frame buffer and registers */
351 if (!request_mem_region(frame_buffer_phys, 0x100000, "valkyriefb")) {
355 p->total_vram = 0x100000;
356 p->frame_buffer_phys = frame_buffer_phys;
358 p->frame_buffer = ioremap(frame_buffer_phys, p->total_vram);
360 p->frame_buffer = ioremap_wt(frame_buffer_phys, p->total_vram);
362 p->cmap_regs_phys = cmap_regs_phys;
363 p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
364 p->valkyrie_regs_phys = cmap_regs_phys+0x6000;
365 p->valkyrie_regs = ioremap(p->valkyrie_regs_phys, 0x1000);
367 if (p->frame_buffer == NULL || p->cmap_regs == NULL
368 || p->valkyrie_regs == NULL) {
369 printk(KERN_ERR "valkyriefb: couldn't map resources\n");
373 valkyrie_choose_mode(p);
374 mac_vmode_to_var(default_vmode, default_cmode, &p->info.var);
375 err = valkyrie_init_info(&p->info, p);
378 valkyrie_init_fix(&p->info.fix, p);
379 if (valkyriefb_set_par(&p->info))
381 printk(KERN_ERR "valkyriefb: can't set default video mode\n");
383 if ((err = register_framebuffer(&p->info)) != 0)
386 fb_info(&p->info, "valkyrie frame buffer device\n");
390 fb_dealloc_cmap(&p->info.cmap);
393 iounmap(p->frame_buffer);
395 iounmap(p->cmap_regs);
396 if (p->valkyrie_regs)
397 iounmap(p->valkyrie_regs);
403 * Get the monitor sense value.
405 static int read_valkyrie_sense(struct fb_info_valkyrie *p)
409 out_8(&p->valkyrie_regs->msense.r, 0); /* release all lines */
411 sense = ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x70) << 4;
412 /* drive each sense line low in turn and collect the other 2 */
413 out_8(&p->valkyrie_regs->msense.r, 4); /* drive A low */
415 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x30);
416 out_8(&p->valkyrie_regs->msense.r, 2); /* drive B low */
418 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x40) >> 3;
419 sense |= (in & 0x10) >> 2;
420 out_8(&p->valkyrie_regs->msense.r, 1); /* drive C low */
422 sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x60) >> 5;
424 out_8(&p->valkyrie_regs->msense.r, 7);
430 * This routine takes a user-supplied var,
431 * and picks the best vmode/cmode from it.
434 /* [bkn] I did a major overhaul of this function.
436 * Much of the old code was "swiped by jonh from atyfb.c". Because
437 * macmodes has mac_var_to_vmode, I felt that it would be better to
438 * rework this function to use that, instead of reinventing the wheel to
439 * add support for vmode 17. This was reinforced by the fact that
440 * the previously swiped atyfb.c code is no longer there.
442 * So, I swiped and adapted platinum_var_to_par (from platinumfb.c), replacing
443 * most, but not all, of the old code in the process. One side benefit of
444 * swiping the platinumfb code is that we now have more comprehensible error
445 * messages when a vmode/cmode switch fails. (Most of the error messages are
446 * platinumfb.c, but I added two of my own, and I also changed some commas
447 * into colons to make the messages more consistent with other Linux error
448 * messages.) In addition, I think the new code *might* fix some vmode-
449 * switching oddities, but I'm not sure.
451 * There may be some more opportunities for cleanup in here, but this is a
455 static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
456 struct fb_par_valkyrie *par, const struct fb_info *fb_info)
459 struct valkyrie_regvals *init;
460 struct fb_info_valkyrie *p =
461 container_of(fb_info, struct fb_info_valkyrie, info);
463 if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
464 printk(KERN_ERR "valkyriefb: can't do %dx%dx%d.\n",
465 var->xres, var->yres, var->bits_per_pixel);
469 /* Check if we know about the wanted video mode */
470 if (vmode < 1 || vmode > VMODE_MAX || !valkyrie_reg_init[vmode-1]) {
471 printk(KERN_ERR "valkyriefb: vmode %d not valid.\n", vmode);
475 if (cmode != CMODE_8 && cmode != CMODE_16) {
476 printk(KERN_ERR "valkyriefb: cmode %d not valid.\n", cmode);
480 if (var->xres_virtual > var->xres || var->yres_virtual > var->yres
481 || var->xoffset != 0 || var->yoffset != 0) {
485 init = valkyrie_reg_init[vmode-1];
486 if (init->pitch[cmode] == 0) {
487 printk(KERN_ERR "valkyriefb: vmode %d does not support "
488 "cmode %d.\n", vmode, cmode);
492 if (valkyrie_vram_reqd(vmode, cmode) > p->total_vram) {
493 printk(KERN_ERR "valkyriefb: not enough ram for vmode %d, "
494 "cmode %d.\n", vmode, cmode);
501 par->xres = var->xres;
502 par->yres = var->yres;
503 par->vxres = par->xres;
504 par->vyres = par->yres;
509 static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p)
511 memset(fix, 0, sizeof(*fix));
512 strcpy(fix->id, "valkyrie");
513 fix->mmio_start = p->valkyrie_regs_phys;
514 fix->mmio_len = sizeof(struct valkyrie_regs);
515 fix->type = FB_TYPE_PACKED_PIXELS;
516 fix->smem_start = p->frame_buffer_phys + 0x1000;
517 fix->smem_len = p->total_vram;
526 /* Fix must already be inited above */
527 static void valkyrie_par_to_fix(struct fb_par_valkyrie *par,
528 struct fb_fix_screeninfo *fix)
530 fix->smem_len = valkyrie_vram_reqd(par->vmode, par->cmode);
531 fix->visual = (par->cmode == CMODE_8) ?
532 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
533 fix->line_length = par->vxres << par->cmode;
534 /* ywrapstep, xpanstep, ypanstep */
537 static int __init valkyrie_init_info(struct fb_info *info,
538 struct fb_info_valkyrie *p)
540 info->fbops = &valkyriefb_ops;
541 info->screen_base = p->frame_buffer + 0x1000;
542 info->flags = FBINFO_DEFAULT;
543 info->pseudo_palette = p->pseudo_palette;
545 return fb_alloc_cmap(&info->cmap, 256, 0);
550 * Parse user specified options (`video=valkyriefb:')
552 int __init valkyriefb_setup(char *options)
556 if (!options || !*options)
559 while ((this_opt = strsep(&options, ",")) != NULL) {
560 if (!strncmp(this_opt, "vmode:", 6)) {
561 int vmode = simple_strtoul(this_opt+6, NULL, 0);
562 if (vmode > 0 && vmode <= VMODE_MAX)
563 default_vmode = vmode;
565 else if (!strncmp(this_opt, "cmode:", 6)) {
566 int depth = simple_strtoul(this_opt+6, NULL, 0);
569 default_cmode = CMODE_8;
573 default_cmode = CMODE_16;
581 module_init(valkyriefb_init);
582 MODULE_LICENSE("GPL");