blob: 6b52bf65f0b57fc3ddced265a76a8ce5b03b0f6e [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <linux/nvram.h>
55#include <linux/adb.h>
56#include <linux/cuda.h>
57#include <asm/io.h>
58#ifdef CONFIG_MAC
59#include <asm/bootinfo.h>
60#include <asm/macintosh.h>
61#else
62#include <asm/prom.h>
63#endif
64#include <asm/pgtable.h>
65
66#include "macmodes.h"
67#include "valkyriefb.h"
68
69#ifdef CONFIG_MAC
70/* We don't yet have functions to read the PRAM... perhaps we can
71 adapt them from the PPC code? */
Finn Thain11e8fac2009-11-04 00:43:52 +110072static int default_vmode = VMODE_CHOOSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073static int default_cmode = CMODE_8;
74#else
75static int default_vmode = VMODE_NVRAM;
76static int default_cmode = CMODE_NVRAM;
77#endif
78
79struct fb_par_valkyrie {
80 int vmode, cmode;
81 int xres, yres;
82 int vxres, vyres;
83 struct valkyrie_regvals *init;
84};
85
86struct fb_info_valkyrie {
87 struct fb_info info;
88 struct fb_par_valkyrie par;
89 struct cmap_regs __iomem *cmap_regs;
90 unsigned long cmap_regs_phys;
91
92 struct valkyrie_regs __iomem *valkyrie_regs;
93 unsigned long valkyrie_regs_phys;
94
95 __u8 __iomem *frame_buffer;
96 unsigned long frame_buffer_phys;
97
98 int sense;
99 unsigned long total_vram;
100
101 u32 pseudo_palette[16];
102};
103
104/*
105 * Exported functions
106 */
107int valkyriefb_init(void);
108int valkyriefb_setup(char*);
109
110static int valkyriefb_check_var(struct fb_var_screeninfo *var,
111 struct fb_info *info);
112static int valkyriefb_set_par(struct fb_info *info);
113static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
114 u_int transp, struct fb_info *info);
115static int valkyriefb_blank(int blank_mode, struct fb_info *info);
116
117static int read_valkyrie_sense(struct fb_info_valkyrie *p);
118static void set_valkyrie_clock(unsigned char *params);
119static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
120 struct fb_par_valkyrie *par, const struct fb_info *fb_info);
121
Andres Salomonccb121e2009-03-31 15:25:26 -0700122static int valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123static void valkyrie_par_to_fix(struct fb_par_valkyrie *par, struct fb_fix_screeninfo *fix);
124static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p);
125
126static 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,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135};
136
137/* Sets the video mode according to info->var */
138static int valkyriefb_set_par(struct fb_info *info)
139{
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;
144 int err;
145
146 if ((err = valkyrie_var_to_par(&info->var, par, info)))
147 return err;
148
149 valkyrie_par_to_fix(par, &info->fix);
150
151 /* Reset the valkyrie */
152 out_8(&valkyrie_regs->status.r, 0);
153 udelay(100);
154
155 /* Initialize display timing registers */
156 init = par->init;
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);
160 udelay(100);
161
162 /* Turn on display */
163 out_8(&valkyrie_regs->mode.r, init->mode);
164
165 return 0;
166}
167
168static inline int valkyrie_par_to_var(struct fb_par_valkyrie *par,
169 struct fb_var_screeninfo *var)
170{
171 return mac_vmode_to_var(par->vmode, par->cmode, var);
172}
173
174static int
175valkyriefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
176{
177 int err;
178 struct fb_par_valkyrie par;
179
180 if ((err = valkyrie_var_to_par(var, &par, info)))
181 return err;
182 valkyrie_par_to_var(&par, var);
183 return 0;
184}
185
186/*
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
195 */
196static int valkyriefb_blank(int blank_mode, struct fb_info *info)
197{
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;
201
202 if (init == NULL)
203 return 1;
204
205 switch (blank_mode) {
206 case FB_BLANK_UNBLANK: /* unblank */
207 out_8(&p->valkyrie_regs->mode.r, init->mode);
208 break;
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:
213 /*
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.
217 */
218 out_8(&p->valkyrie_regs->mode.r, init->mode | 0x40);
219 break;
220 case FB_BLANK_POWERDOWN:
221 out_8(&p->valkyrie_regs->mode.r, 0x66);
222 break;
223 }
224 return 0;
225}
226
227static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
228 u_int transp, struct fb_info *info)
229{
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;
233
234 if (regno > 255)
235 return 1;
236 red >>= 8;
237 green >>= 8;
238 blue >>= 8;
239
240 /* tell clut which address to fill */
241 out_8(&p->cmap_regs->addr, regno);
242 udelay(1);
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);
247
248 if (regno < 16 && par->cmode == CMODE_16)
249 ((u32 *)info->pseudo_palette)[regno] =
250 (regno << 10) | (regno << 5) | regno;
251
252 return 0;
253}
254
255static inline int valkyrie_vram_reqd(int video_mode, int color_mode)
256{
257 int pitch;
258 struct valkyrie_regvals *init = valkyrie_reg_init[video_mode-1];
259
260 if ((pitch = init->pitch[color_mode]) == 0)
261 pitch = 2 * init->pitch[0];
262 return init->vres * pitch;
263}
264
265static void set_valkyrie_clock(unsigned char *params)
266{
267 struct adb_request req;
268 int i;
269
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)
275 cuda_poll();
276 }
277#endif
278}
279
280static void __init valkyrie_choose_mode(struct fb_info_valkyrie *p)
281{
282 p->sense = read_valkyrie_sense(p);
283 printk(KERN_INFO "Monitor sense value = 0x%x\n", p->sense);
284
285 /* Try to pick a video mode out of NVRAM if we have one. */
Ben Collins996f3242006-10-18 08:53:37 -0400286#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 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;
293 }
294#endif
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;
Ben Collins996f3242006-10-18 08:53:37 -0400299#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 if (default_cmode == CMODE_NVRAM)
301 default_cmode = nvram_read_byte(NV_CMODE);
302#endif
303
304 /*
305 * Reduce the pixel size if we don't have enough VRAM or bandwidth.
306 */
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;
311
312 printk(KERN_INFO "using video mode %d and color mode %d.\n",
313 default_vmode, default_cmode);
314}
315
316int __init valkyriefb_init(void)
317{
318 struct fb_info_valkyrie *p;
319 unsigned long frame_buffer_phys, cmap_regs_phys, flags;
320 int err;
321 char *option = NULL;
322
323 if (fb_get_options("valkyriefb", &option))
324 return -ENODEV;
325 valkyriefb_setup(option);
326
327#ifdef CONFIG_MAC
328 if (!MACH_IS_MAC)
Finn Thain11e8fac2009-11-04 00:43:52 +1100329 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 if (!(mac_bi_data.id == MAC_MODEL_Q630
331 /* I'm not sure about this one */
332 || mac_bi_data.id == MAC_MODEL_P588))
Finn Thain11e8fac2009-11-04 00:43:52 +1100333 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
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) */
340 {
341 struct device_node *dp;
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100342 struct resource r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100344 dp = of_find_node_by_name(NULL, "valkyrie");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 if (dp == 0)
346 return 0;
347
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100348 if (of_address_to_resource(dp, 0, &r)) {
349 printk(KERN_ERR "can't find address for valkyrie\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 return 0;
351 }
352
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +1100353 frame_buffer_phys = r.start;
354 cmap_regs_phys = r.start + 0x304000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 flags = _PAGE_WRITETHRU;
356 }
357#endif /* ppc (!CONFIG_MAC) */
358
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700359 p = kzalloc(sizeof(*p), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 if (p == 0)
361 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
363 /* Map in frame buffer and registers */
364 if (!request_mem_region(frame_buffer_phys, 0x100000, "valkyriefb")) {
365 kfree(p);
366 return 0;
367 }
368 p->total_vram = 0x100000;
369 p->frame_buffer_phys = frame_buffer_phys;
370 p->frame_buffer = __ioremap(frame_buffer_phys, p->total_vram, flags);
371 p->cmap_regs_phys = cmap_regs_phys;
372 p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
373 p->valkyrie_regs_phys = cmap_regs_phys+0x6000;
374 p->valkyrie_regs = ioremap(p->valkyrie_regs_phys, 0x1000);
375 err = -ENOMEM;
376 if (p->frame_buffer == NULL || p->cmap_regs == NULL
377 || p->valkyrie_regs == NULL) {
378 printk(KERN_ERR "valkyriefb: couldn't map resources\n");
379 goto out_free;
380 }
381
382 valkyrie_choose_mode(p);
383 mac_vmode_to_var(default_vmode, default_cmode, &p->info.var);
Andres Salomonccb121e2009-03-31 15:25:26 -0700384 err = valkyrie_init_info(&p->info, p);
385 if (err < 0)
386 goto out_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 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)
Andres Salomonccb121e2009-03-31 15:25:26 -0700393 goto out_cmap_free;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
395 printk(KERN_INFO "fb%d: valkyrie frame buffer device\n", p->info.node);
396 return 0;
397
Andres Salomonccb121e2009-03-31 15:25:26 -0700398 out_cmap_free:
399 fb_dealloc_cmap(&p->info.cmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 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
Andres Salomonccb121e2009-03-31 15:25:26 -0700545static int __init valkyrie_init_info(struct fb_info *info,
546 struct fb_info_valkyrie *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547{
548 info->fbops = &valkyriefb_ops;
549 info->screen_base = p->frame_buffer + 0x1000;
550 info->flags = FBINFO_DEFAULT;
551 info->pseudo_palette = p->pseudo_palette;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 info->par = &p->par;
Andres Salomonccb121e2009-03-31 15:25:26 -0700553 return fb_alloc_cmap(&info->cmap, 256, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554}
555
556
557/*
558 * Parse user speficied options (`video=valkyriefb:')
559 */
560int __init valkyriefb_setup(char *options)
561{
562 char *this_opt;
563
564 if (!options || !*options)
565 return 0;
566
567 while ((this_opt = strsep(&options, ",")) != NULL) {
568 if (!strncmp(this_opt, "vmode:", 6)) {
569 int vmode = simple_strtoul(this_opt+6, NULL, 0);
570 if (vmode > 0 && vmode <= VMODE_MAX)
571 default_vmode = vmode;
572 }
573 else if (!strncmp(this_opt, "cmode:", 6)) {
574 int depth = simple_strtoul(this_opt+6, NULL, 0);
575 switch (depth) {
576 case 8:
577 default_cmode = CMODE_8;
578 break;
579 case 15:
580 case 16:
581 default_cmode = CMODE_16;
582 break;
583 }
584 }
585 }
586 return 0;
587}
588
589module_init(valkyriefb_init);
590MODULE_LICENSE("GPL");