1 /*
2 * platinumfb.c -- frame buffer device for the PowerMac 'platinum' display
3 *
4 * Copyright (C) 1998 Franz Sirl
5 *
6 * Frame buffer structure from:
7 * drivers/video/controlfb.c -- frame buffer device for
8 * Apple 'control' display chip.
9 * Copyright (C) 1998 Dan Jacobowitz
10 *
11 * Hardware information from:
12 * platinum.c: Console support for PowerMac "platinum" display adaptor.
13 * Copyright (C) 1996 Paul Mackerras and Mark Abene
14 *
15 * This file is subject to the terms and conditions of the GNU General Public
16 * License. See the file COPYING in the main directory of this archive for
17 * more details.
18 */
19
20 #undef DEBUG
21
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/errno.h>
25 #include <linux/string.h>
26 #include <linux/mm.h>
27 #include <linux/vmalloc.h>
28 #include <linux/delay.h>
29 #include <linux/interrupt.h>
30 #include <linux/fb.h>
31 #include <linux/init.h>
32 #include <linux/nvram.h>
33 #include <linux/of_device.h>
34 #include <linux/of_platform.h>
35 #include <asm/io.h>
36 #include <asm/prom.h>
37 #include <asm/pgtable.h>
38
39 #include "macmodes.h"
40 #include "platinumfb.h"
41
42 static int default_vmode = VMODE_NVRAM;
43 static int default_cmode = CMODE_NVRAM;
44
45 struct fb_info_platinum {
46 struct fb_info *info;
47
48 int vmode, cmode;
49 int xres, yres;
50 int vxres, vyres;
51 int xoffset, yoffset;
52
53 struct {
54 __u8 red, green, blue;
55 } palette[256];
56 u32 pseudo_palette[16];
57
58 volatile struct cmap_regs __iomem *cmap_regs;
59 unsigned long cmap_regs_phys;
60
61 volatile struct platinum_regs __iomem *platinum_regs;
62 unsigned long platinum_regs_phys;
63
64 __u8 __iomem *frame_buffer;
65 volatile __u8 __iomem *base_frame_buffer;
66 unsigned long frame_buffer_phys;
67
68 unsigned long total_vram;
69 int clktype;
70 int dactype;
71
72 struct resource rsrc_fb, rsrc_reg;
73 };
74
75 /*
76 * Frame buffer device API
77 */
78
79 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
80 u_int transp, struct fb_info *info);
81 static int platinumfb_blank(int blank_mode, struct fb_info *info);
82 static int platinumfb_set_par (struct fb_info *info);
83 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
84
85 /*
86 * internal functions
87 */
88
89 static inline int platinum_vram_reqd(int video_mode, int color_mode);
90 static int read_platinum_sense(struct fb_info_platinum *pinfo);
91 static void set_platinum_clock(struct fb_info_platinum *pinfo);
92 static void platinum_set_hardware(struct fb_info_platinum *pinfo);
93 static int platinum_var_to_par(struct fb_var_screeninfo *var,
94 struct fb_info_platinum *pinfo,
95 int check_only);
96
97 /*
98 * Interface used by the world
99 */
100
101 static struct fb_ops platinumfb_ops = {
102 .owner = THIS_MODULE,
103 .fb_check_var = platinumfb_check_var,
104 .fb_set_par = platinumfb_set_par,
105 .fb_setcolreg = platinumfb_setcolreg,
106 .fb_blank = platinumfb_blank,
107 .fb_fillrect = cfb_fillrect,
108 .fb_copyarea = cfb_copyarea,
109 .fb_imageblit = cfb_imageblit,
110 };
111
112 /*
113 * Checks a var structure
114 */
platinumfb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)115 static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
116 {
117 return platinum_var_to_par(var, info->par, 1);
118 }
119
120 /*
121 * Applies current var to display
122 */
platinumfb_set_par(struct fb_info * info)123 static int platinumfb_set_par (struct fb_info *info)
124 {
125 struct fb_info_platinum *pinfo = info->par;
126 struct platinum_regvals *init;
127 int err, offset = 0x20;
128
129 if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
130 printk (KERN_ERR "platinumfb_set_par: error calling"
131 " platinum_var_to_par: %d.\n", err);
132 return err;
133 }
134
135 platinum_set_hardware(pinfo);
136
137 init = platinum_reg_init[pinfo->vmode-1];
138
139 if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
140 offset = 0x10;
141
142 info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
143 mutex_lock(&info->mm_lock);
144 info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
145 mutex_unlock(&info->mm_lock);
146 info->fix.visual = (pinfo->cmode == CMODE_8) ?
147 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
148 info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
149 + offset;
150 printk("line_length: %x\n", info->fix.line_length);
151 return 0;
152 }
153
platinumfb_blank(int blank,struct fb_info * fb)154 static int platinumfb_blank(int blank, struct fb_info *fb)
155 {
156 /*
157 * Blank the screen if blank_mode != 0, else unblank. If blank == NULL
158 * then the caller blanks by setting the CLUT (Color Look Up Table) to all
159 * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
160 * to e.g. a video mode which doesn't support it. Implements VESA suspend
161 * and powerdown modes on hardware that supports disabling hsync/vsync:
162 * blank_mode == 2: suspend vsync
163 * blank_mode == 3: suspend hsync
164 * blank_mode == 4: powerdown
165 */
166 /* [danj] I think there's something fishy about those constants... */
167 /*
168 struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
169 int ctrl;
170
171 ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33;
172 if (blank)
173 --blank_mode;
174 if (blank & VESA_VSYNC_SUSPEND)
175 ctrl &= ~3;
176 if (blank & VESA_HSYNC_SUSPEND)
177 ctrl &= ~0x30;
178 out_le32(&info->platinum_regs->ctrl.r, ctrl);
179 */
180 /* TODO: Figure out how the heck to powerdown this thing! */
181 return 0;
182 }
183
platinumfb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * info)184 static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
185 u_int transp, struct fb_info *info)
186 {
187 struct fb_info_platinum *pinfo = info->par;
188 volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
189
190 if (regno > 255)
191 return 1;
192
193 red >>= 8;
194 green >>= 8;
195 blue >>= 8;
196
197 pinfo->palette[regno].red = red;
198 pinfo->palette[regno].green = green;
199 pinfo->palette[regno].blue = blue;
200
201 out_8(&cmap_regs->addr, regno); /* tell clut what addr to fill */
202 out_8(&cmap_regs->lut, red); /* send one color channel at */
203 out_8(&cmap_regs->lut, green); /* a time... */
204 out_8(&cmap_regs->lut, blue);
205
206 if (regno < 16) {
207 int i;
208 u32 *pal = info->pseudo_palette;
209 switch (pinfo->cmode) {
210 case CMODE_16:
211 pal[regno] = (regno << 10) | (regno << 5) | regno;
212 break;
213 case CMODE_32:
214 i = (regno << 8) | regno;
215 pal[regno] = (i << 16) | i;
216 break;
217 }
218 }
219
220 return 0;
221 }
222
platinum_vram_reqd(int video_mode,int color_mode)223 static inline int platinum_vram_reqd(int video_mode, int color_mode)
224 {
225 int baseval = vmode_attrs[video_mode-1].hres * (1<<color_mode);
226
227 if ((video_mode == VMODE_832_624_75) && (color_mode > CMODE_8))
228 baseval += 0x10;
229 else
230 baseval += 0x20;
231
232 return vmode_attrs[video_mode-1].vres * baseval + 0x1000;
233 }
234
235 #define STORE_D2(a, d) { \
236 out_8(&cmap_regs->addr, (a+32)); \
237 out_8(&cmap_regs->d2, (d)); \
238 }
239
set_platinum_clock(struct fb_info_platinum * pinfo)240 static void set_platinum_clock(struct fb_info_platinum *pinfo)
241 {
242 volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
243 struct platinum_regvals *init;
244
245 init = platinum_reg_init[pinfo->vmode-1];
246
247 STORE_D2(6, 0xc6);
248 out_8(&cmap_regs->addr,3+32);
249
250 if (in_8(&cmap_regs->d2) == 2) {
251 STORE_D2(7, init->clock_params[pinfo->clktype][0]);
252 STORE_D2(8, init->clock_params[pinfo->clktype][1]);
253 STORE_D2(3, 3);
254 } else {
255 STORE_D2(4, init->clock_params[pinfo->clktype][0]);
256 STORE_D2(5, init->clock_params[pinfo->clktype][1]);
257 STORE_D2(3, 2);
258 }
259
260 __delay(5000);
261 STORE_D2(9, 0xa6);
262 }
263
264
265 /* Now how about actually saying, Make it so! */
266 /* Some things in here probably don't need to be done each time. */
platinum_set_hardware(struct fb_info_platinum * pinfo)267 static void platinum_set_hardware(struct fb_info_platinum *pinfo)
268 {
269 volatile struct platinum_regs __iomem *platinum_regs = pinfo->platinum_regs;
270 volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
271 struct platinum_regvals *init;
272 int i;
273 int vmode, cmode;
274
275 vmode = pinfo->vmode;
276 cmode = pinfo->cmode;
277
278 init = platinum_reg_init[vmode - 1];
279
280 /* Initialize display timing registers */
281 out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
282
283 for (i = 0; i < 26; ++i)
284 out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
285
286 out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
287 init->offset[cmode] + 4 - cmode :
288 init->offset[cmode]));
289 out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
290 out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
291 out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
292 init->mode[cmode+1] :
293 init->mode[cmode]));
294 out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
295 out_be32(&platinum_regs->reg[21].r, 0x100);
296 out_be32(&platinum_regs->reg[22].r, 1);
297 out_be32(&platinum_regs->reg[23].r, 1);
298 out_be32(&platinum_regs->reg[26].r, 0xc00);
299 out_be32(&platinum_regs->reg[27].r, 0x235);
300 /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
301
302 STORE_D2(0, (pinfo->total_vram == 0x100000 ?
303 init->dacula_ctrl[cmode] & 0xf :
304 init->dacula_ctrl[cmode]));
305 STORE_D2(1, 4);
306 STORE_D2(2, 0);
307
308 set_platinum_clock(pinfo);
309
310 out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
311 }
312
313 /*
314 * Set misc info vars for this driver
315 */
platinum_init_info(struct fb_info * info,struct fb_info_platinum * pinfo)316 static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo)
317 {
318 /* Fill fb_info */
319 info->fbops = &platinumfb_ops;
320 info->pseudo_palette = pinfo->pseudo_palette;
321 info->flags = FBINFO_DEFAULT;
322 info->screen_base = pinfo->frame_buffer + 0x20;
323
324 fb_alloc_cmap(&info->cmap, 256, 0);
325
326 /* Fill fix common fields */
327 strcpy(info->fix.id, "platinum");
328 info->fix.mmio_start = pinfo->platinum_regs_phys;
329 info->fix.mmio_len = 0x1000;
330 info->fix.type = FB_TYPE_PACKED_PIXELS;
331 info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
332 info->fix.smem_len = pinfo->total_vram - 0x20;
333 info->fix.ywrapstep = 0;
334 info->fix.xpanstep = 0;
335 info->fix.ypanstep = 0;
336 info->fix.type_aux = 0;
337 info->fix.accel = FB_ACCEL_NONE;
338 }
339
340
platinum_init_fb(struct fb_info * info)341 static int __devinit platinum_init_fb(struct fb_info *info)
342 {
343 struct fb_info_platinum *pinfo = info->par;
344 struct fb_var_screeninfo var;
345 int sense, rc;
346
347 sense = read_platinum_sense(pinfo);
348 printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
349 if (default_vmode == VMODE_NVRAM) {
350 #ifdef CONFIG_NVRAM
351 default_vmode = nvram_read_byte(NV_VMODE);
352 if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
353 !platinum_reg_init[default_vmode-1])
354 #endif
355 default_vmode = VMODE_CHOOSE;
356 }
357 if (default_vmode == VMODE_CHOOSE) {
358 default_vmode = mac_map_monitor_sense(sense);
359 }
360 if (default_vmode <= 0 || default_vmode > VMODE_MAX)
361 default_vmode = VMODE_640_480_60;
362 #ifdef CONFIG_NVRAM
363 if (default_cmode == CMODE_NVRAM)
364 default_cmode = nvram_read_byte(NV_CMODE);
365 #endif
366 if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
367 default_cmode = CMODE_8;
368 /*
369 * Reduce the pixel size if we don't have enough VRAM.
370 */
371 while(default_cmode > CMODE_8 &&
372 platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
373 default_cmode--;
374
375 printk("platinumfb: Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
376
377 /* Setup default var */
378 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
379 /* This shouldn't happen! */
380 printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
381 try_again:
382 default_vmode = VMODE_640_480_60;
383 default_cmode = CMODE_8;
384 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
385 printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
386 return -ENXIO;
387 }
388 }
389
390 /* Initialize info structure */
391 platinum_init_info(info, pinfo);
392
393 /* Apply default var */
394 info->var = var;
395 var.activate = FB_ACTIVATE_NOW;
396 rc = fb_set_var(info, &var);
397 if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
398 goto try_again;
399
400 /* Register with fbdev layer */
401 rc = register_framebuffer(info);
402 if (rc < 0)
403 return rc;
404
405 printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node);
406
407 return 0;
408 }
409
410 /*
411 * Get the monitor sense value.
412 * Note that this can be called before calibrate_delay,
413 * so we can't use udelay.
414 */
read_platinum_sense(struct fb_info_platinum * info)415 static int read_platinum_sense(struct fb_info_platinum *info)
416 {
417 volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
418 int sense;
419
420 out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
421 __delay(2000);
422 sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
423
424 /* drive each sense line low in turn and collect the other 2 */
425 out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
426 __delay(2000);
427 sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
428 out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
429 __delay(2000);
430 sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
431 sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
432 out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
433 __delay(2000);
434 sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
435
436 out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
437
438 return sense;
439 }
440
441 /*
442 * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
443 * It also updates the var structure to the actual mode data obtained
444 */
platinum_var_to_par(struct fb_var_screeninfo * var,struct fb_info_platinum * pinfo,int check_only)445 static int platinum_var_to_par(struct fb_var_screeninfo *var,
446 struct fb_info_platinum *pinfo,
447 int check_only)
448 {
449 int vmode, cmode;
450
451 if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
452 printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
453 printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
454 printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
455 printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
456 printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
457 printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
458 printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
459 printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
460 return -EINVAL;
461 }
462
463 if (!platinum_reg_init[vmode-1]) {
464 printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
465 return -EINVAL;
466 }
467
468 if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
469 printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
470 return -EINVAL;
471 }
472
473 if (mac_vmode_to_var(vmode, cmode, var))
474 return -EINVAL;
475
476 if (check_only)
477 return 0;
478
479 pinfo->vmode = vmode;
480 pinfo->cmode = cmode;
481 pinfo->xres = vmode_attrs[vmode-1].hres;
482 pinfo->yres = vmode_attrs[vmode-1].vres;
483 pinfo->xoffset = 0;
484 pinfo->yoffset = 0;
485 pinfo->vxres = pinfo->xres;
486 pinfo->vyres = pinfo->yres;
487
488 return 0;
489 }
490
491
492 /*
493 * Parse user specified options (`video=platinumfb:')
494 */
platinumfb_setup(char * options)495 static int __init platinumfb_setup(char *options)
496 {
497 char *this_opt;
498
499 if (!options || !*options)
500 return 0;
501
502 while ((this_opt = strsep(&options, ",")) != NULL) {
503 if (!strncmp(this_opt, "vmode:", 6)) {
504 int vmode = simple_strtoul(this_opt+6, NULL, 0);
505 if (vmode > 0 && vmode <= VMODE_MAX)
506 default_vmode = vmode;
507 } else if (!strncmp(this_opt, "cmode:", 6)) {
508 int depth = simple_strtoul(this_opt+6, NULL, 0);
509 switch (depth) {
510 case 0:
511 case 8:
512 default_cmode = CMODE_8;
513 break;
514 case 15:
515 case 16:
516 default_cmode = CMODE_16;
517 break;
518 case 24:
519 case 32:
520 default_cmode = CMODE_32;
521 break;
522 }
523 }
524 }
525 return 0;
526 }
527
528 #ifdef __powerpc__
529 #define invalidate_cache(addr) \
530 asm volatile("eieio; dcbf 0,%1" \
531 : "=m" (*(addr)) : "r" (addr) : "memory");
532 #else
533 #define invalidate_cache(addr)
534 #endif
535
platinumfb_probe(struct platform_device * odev)536 static int __devinit platinumfb_probe(struct platform_device* odev)
537 {
538 struct device_node *dp = odev->dev.of_node;
539 struct fb_info *info;
540 struct fb_info_platinum *pinfo;
541 volatile __u8 *fbuffer;
542 int bank0, bank1, bank2, bank3, rc;
543
544 dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
545
546 info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
547 if (info == NULL) {
548 dev_err(&odev->dev, "Failed to allocate fbdev !\n");
549 return -ENOMEM;
550 }
551 pinfo = info->par;
552
553 if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
554 of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
555 dev_err(&odev->dev, "Can't get resources\n");
556 framebuffer_release(info);
557 return -ENXIO;
558 }
559 dev_dbg(&odev->dev, " registers : 0x%llx...0x%llx\n",
560 (unsigned long long)pinfo->rsrc_reg.start,
561 (unsigned long long)pinfo->rsrc_reg.end);
562 dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
563 (unsigned long long)pinfo->rsrc_fb.start,
564 (unsigned long long)pinfo->rsrc_fb.end);
565
566 /* Do not try to request register space, they overlap with the
567 * northbridge and that can fail. Only request framebuffer
568 */
569 if (!request_mem_region(pinfo->rsrc_fb.start,
570 resource_size(&pinfo->rsrc_fb),
571 "platinumfb framebuffer")) {
572 printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
573 framebuffer_release(info);
574 return -ENXIO;
575 }
576
577 /* frame buffer - map only 4MB */
578 pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
579 pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
580 _PAGE_WRITETHRU);
581 pinfo->base_frame_buffer = pinfo->frame_buffer;
582
583 /* registers */
584 pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
585 pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
586
587 pinfo->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */
588 request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
589 pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
590
591 /* Grok total video ram */
592 out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
593 out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011); /* select max vram */
594 out_be32(&pinfo->platinum_regs->reg[24].r, 0); /* switch in vram */
595
596 fbuffer = pinfo->base_frame_buffer;
597 fbuffer[0x100000] = 0x34;
598 fbuffer[0x100008] = 0x0;
599 invalidate_cache(&fbuffer[0x100000]);
600 fbuffer[0x200000] = 0x56;
601 fbuffer[0x200008] = 0x0;
602 invalidate_cache(&fbuffer[0x200000]);
603 fbuffer[0x300000] = 0x78;
604 fbuffer[0x300008] = 0x0;
605 invalidate_cache(&fbuffer[0x300000]);
606 bank0 = 1; /* builtin 1MB vram, always there */
607 bank1 = fbuffer[0x100000] == 0x34;
608 bank2 = fbuffer[0x200000] == 0x56;
609 bank3 = fbuffer[0x300000] == 0x78;
610 pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
611 printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
612 (unsigned int) (pinfo->total_vram / 1024 / 1024),
613 bank3, bank2, bank1, bank0);
614
615 /*
616 * Try to determine whether we have an old or a new DACula.
617 */
618 out_8(&pinfo->cmap_regs->addr, 0x40);
619 pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
620 switch (pinfo->dactype) {
621 case 0x3c:
622 pinfo->clktype = 1;
623 printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
624 break;
625 case 0x84:
626 pinfo->clktype = 0;
627 printk(KERN_INFO "platinumfb: DACula type 0x84\n");
628 break;
629 default:
630 pinfo->clktype = 0;
631 printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
632 break;
633 }
634 dev_set_drvdata(&odev->dev, info);
635
636 rc = platinum_init_fb(info);
637 if (rc != 0) {
638 iounmap(pinfo->frame_buffer);
639 iounmap(pinfo->platinum_regs);
640 iounmap(pinfo->cmap_regs);
641 dev_set_drvdata(&odev->dev, NULL);
642 framebuffer_release(info);
643 }
644
645 return rc;
646 }
647
platinumfb_remove(struct platform_device * odev)648 static int __devexit platinumfb_remove(struct platform_device* odev)
649 {
650 struct fb_info *info = dev_get_drvdata(&odev->dev);
651 struct fb_info_platinum *pinfo = info->par;
652
653 unregister_framebuffer (info);
654
655 /* Unmap frame buffer and registers */
656 iounmap(pinfo->frame_buffer);
657 iounmap(pinfo->platinum_regs);
658 iounmap(pinfo->cmap_regs);
659
660 release_mem_region(pinfo->rsrc_fb.start,
661 resource_size(&pinfo->rsrc_fb));
662
663 release_mem_region(pinfo->cmap_regs_phys, 0x1000);
664
665 framebuffer_release(info);
666
667 return 0;
668 }
669
670 static struct of_device_id platinumfb_match[] =
671 {
672 {
673 .name = "platinum",
674 },
675 {},
676 };
677
678 static struct platform_driver platinum_driver =
679 {
680 .driver = {
681 .name = "platinumfb",
682 .owner = THIS_MODULE,
683 .of_match_table = platinumfb_match,
684 },
685 .probe = platinumfb_probe,
686 .remove = __devexit_p(platinumfb_remove),
687 };
688
platinumfb_init(void)689 static int __init platinumfb_init(void)
690 {
691 #ifndef MODULE
692 char *option = NULL;
693
694 if (fb_get_options("platinumfb", &option))
695 return -ENODEV;
696 platinumfb_setup(option);
697 #endif
698 platform_driver_register(&platinum_driver);
699
700 return 0;
701 }
702
platinumfb_exit(void)703 static void __exit platinumfb_exit(void)
704 {
705 platform_driver_unregister(&platinum_driver);
706 }
707
708 MODULE_LICENSE("GPL");
709 MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
710 module_init(platinumfb_init);
711
712 #ifdef MODULE
713 module_exit(platinumfb_exit);
714 #endif
715