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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[linux-2.6-block.git] / drivers / video / fbdev / platinumfb.c
CommitLineData
1da177e4
LT		 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
4c2a54b0
BH		 20#undef DEBUG
21
1da177e4
LT		 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>
1da177e4
LT		 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>
1da177e4 32#include <linux/nvram.h>
cec0dd94
SR		 33#include <linux/of_device.h>
34#include <linux/of_platform.h>
1da177e4 35#include <asm/prom.h>
1da177e4
LT		 36
37#include "macmodes.h"
38#include "platinumfb.h"
39
40static int default_vmode = VMODE_NVRAM;
41static int default_cmode = CMODE_NVRAM;
42
43struct fb_info_platinum {
44 struct fb_info *info;
45
46 int vmode, cmode;
47 int xres, yres;
48 int vxres, vyres;
49 int xoffset, yoffset;
50
51 struct {
52 __u8 red, green, blue;
53 } palette[256];
02c2c209 54 u32 pseudo_palette[16];
1da177e4
LT		 55
56 volatile struct cmap_regs __iomem *cmap_regs;
57 unsigned long cmap_regs_phys;
58
59 volatile struct platinum_regs __iomem *platinum_regs;
60 unsigned long platinum_regs_phys;
61
62 __u8 __iomem *frame_buffer;
63 volatile __u8 __iomem *base_frame_buffer;
64 unsigned long frame_buffer_phys;
65
66 unsigned long total_vram;
67 int clktype;
68 int dactype;
cc5d0189
BH		 69
70 struct resource rsrc_fb, rsrc_reg;
1da177e4
LT		 71};
72
73/*
74 * Frame buffer device API
75 */
76
77static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
78 u_int transp, struct fb_info *info);
79static int platinumfb_blank(int blank_mode, struct fb_info *info);
80static int platinumfb_set_par (struct fb_info *info);
81static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
82
83/*
84 * internal functions
85 */
86
87static inline int platinum_vram_reqd(int video_mode, int color_mode);
88static int read_platinum_sense(struct fb_info_platinum *pinfo);
89static void set_platinum_clock(struct fb_info_platinum *pinfo);
90static void platinum_set_hardware(struct fb_info_platinum *pinfo);
91static int platinum_var_to_par(struct fb_var_screeninfo *var,
92 struct fb_info_platinum *pinfo,
93 int check_only);
94
95/*
96 * Interface used by the world
97 */
98
1da177e4
LT		 99static struct fb_ops platinumfb_ops = {
100 .owner = THIS_MODULE,
101 .fb_check_var = platinumfb_check_var,
102 .fb_set_par = platinumfb_set_par,
103 .fb_setcolreg = platinumfb_setcolreg,
104 .fb_blank = platinumfb_blank,
105 .fb_fillrect = cfb_fillrect,
106 .fb_copyarea = cfb_copyarea,
107 .fb_imageblit = cfb_imageblit,
1da177e4
LT		 108};
109
110/*
111 * Checks a var structure
112 */
113static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
114{
115 return platinum_var_to_par(var, info->par, 1);
116}
117
118/*
119 * Applies current var to display
120 */
121static int platinumfb_set_par (struct fb_info *info)
122{
123 struct fb_info_platinum *pinfo = info->par;
124 struct platinum_regvals *init;
125 int err, offset = 0x20;
126
127 if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
128 printk (KERN_ERR "platinumfb_set_par: error calling"
129 " platinum_var_to_par: %d.\n", err);
130 return err;
131 }
132
133 platinum_set_hardware(pinfo);
134
135 init = platinum_reg_init[pinfo->vmode-1];
136
9cf84d7c
BH		 137 if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
138 offset = 0x10;
139
1da177e4 140 info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
537a1bf0 141 mutex_lock(&info->mm_lock);
1da177e4 142 info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
537a1bf0 143 mutex_unlock(&info->mm_lock);
1da177e4
LT		 144 info->fix.visual = (pinfo->cmode == CMODE_8) ?
145 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
9cf84d7c
BH		 146 info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
147 + offset;
1da177e4
LT		 148 printk("line_length: %x\n", info->fix.line_length);
149 return 0;
150}
151
152static int platinumfb_blank(int blank, struct fb_info *fb)
153{
154/*
155 * Blank the screen if blank_mode != 0, else unblank. If blank == NULL
156 * then the caller blanks by setting the CLUT (Color Look Up Table) to all
157 * black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
158 * to e.g. a video mode which doesn't support it. Implements VESA suspend
159 * and powerdown modes on hardware that supports disabling hsync/vsync:
160 * blank_mode == 2: suspend vsync
161 * blank_mode == 3: suspend hsync
162 * blank_mode == 4: powerdown
163 */
164/* [danj] I think there's something fishy about those constants... */
165/*
166 struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
167 int ctrl;
168
f5718726 169 ctrl = le32_to_cpup(&info->platinum_regs->ctrl.r) | 0x33;
1da177e4
LT		 170 if (blank)
171 --blank_mode;
172 if (blank & VESA_VSYNC_SUSPEND)
173 ctrl &= ~3;
174 if (blank & VESA_HSYNC_SUSPEND)
175 ctrl &= ~0x30;
176 out_le32(&info->platinum_regs->ctrl.r, ctrl);
177*/
178/* TODO: Figure out how the heck to powerdown this thing! */
179 return 0;
180}
181
182static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
183 u_int transp, struct fb_info *info)
184{
185 struct fb_info_platinum *pinfo = info->par;
186 volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
187
188 if (regno > 255)
189 return 1;
190
191 red >>= 8;
192 green >>= 8;
193 blue >>= 8;
194
195 pinfo->palette[regno].red = red;
196 pinfo->palette[regno].green = green;
197 pinfo->palette[regno].blue = blue;
198
199 out_8(&cmap_regs->addr, regno); /* tell clut what addr to fill */
200 out_8(&cmap_regs->lut, red); /* send one color channel at */
201 out_8(&cmap_regs->lut, green); /* a time... */
202 out_8(&cmap_regs->lut, blue);
203
204 if (regno < 16) {
205 int i;
206 u32 *pal = info->pseudo_palette;
207 switch (pinfo->cmode) {
208 case CMODE_16:
209 pal[regno] = (regno << 10) | (regno << 5) | regno;
210 break;
211 case CMODE_32:
212 i = (regno << 8) | regno;
213 pal[regno] = (i << 16) | i;
214 break;
215 }
216 }
217
218 return 0;
219}
220
221static inline int platinum_vram_reqd(int video_mode, int color_mode)
222{
6e3658f0
RK		 223 int baseval = vmode_attrs[video_mode-1].hres * (1<<color_mode);
224
225 if ((video_mode == VMODE_832_624_75) && (color_mode > CMODE_8))
226 baseval += 0x10;
227 else
228 baseval += 0x20;
229
230 return vmode_attrs[video_mode-1].vres * baseval + 0x1000;
1da177e4
LT		 231}
232
233#define STORE_D2(a, d) { \
234 out_8(&cmap_regs->addr, (a+32)); \
235 out_8(&cmap_regs->d2, (d)); \
236}
237
238static void set_platinum_clock(struct fb_info_platinum *pinfo)
239{
240 volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
241 struct platinum_regvals *init;
242
243 init = platinum_reg_init[pinfo->vmode-1];
244
245 STORE_D2(6, 0xc6);
246 out_8(&cmap_regs->addr,3+32);
247
248 if (in_8(&cmap_regs->d2) == 2) {
249 STORE_D2(7, init->clock_params[pinfo->clktype][0]);
250 STORE_D2(8, init->clock_params[pinfo->clktype][1]);
251 STORE_D2(3, 3);
252 } else {
253 STORE_D2(4, init->clock_params[pinfo->clktype][0]);
254 STORE_D2(5, init->clock_params[pinfo->clktype][1]);
255 STORE_D2(3, 2);
256 }
257
258 __delay(5000);
259 STORE_D2(9, 0xa6);
260}
261
262
263/* Now how about actually saying, Make it so! */
264/* Some things in here probably don't need to be done each time. */
265static void platinum_set_hardware(struct fb_info_platinum *pinfo)
266{
267 volatile struct platinum_regs __iomem *platinum_regs = pinfo->platinum_regs;
268 volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
269 struct platinum_regvals *init;
270 int i;
271 int vmode, cmode;
272
273 vmode = pinfo->vmode;
274 cmode = pinfo->cmode;
275
276 init = platinum_reg_init[vmode - 1];
277
278 /* Initialize display timing registers */
279 out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
280
281 for (i = 0; i < 26; ++i)
282 out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
283
284 out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
285 init->offset[cmode] + 4 - cmode :
286 init->offset[cmode]));
287 out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
288 out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
289 out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
290 init->mode[cmode+1] :
291 init->mode[cmode]));
292 out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
293 out_be32(&platinum_regs->reg[21].r, 0x100);
294 out_be32(&platinum_regs->reg[22].r, 1);
295 out_be32(&platinum_regs->reg[23].r, 1);
296 out_be32(&platinum_regs->reg[26].r, 0xc00);
297 out_be32(&platinum_regs->reg[27].r, 0x235);
298 /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
299
300 STORE_D2(0, (pinfo->total_vram == 0x100000 ?
301 init->dacula_ctrl[cmode] & 0xf :
302 init->dacula_ctrl[cmode]));
303 STORE_D2(1, 4);
304 STORE_D2(2, 0);
305
306 set_platinum_clock(pinfo);
307
308 out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
309}
310
311/*
312 * Set misc info vars for this driver
313 */
48c68c4f
GKH		 314static void platinum_init_info(struct fb_info *info,
315 struct fb_info_platinum *pinfo)
1da177e4
LT		 316{
317 /* Fill fb_info */
318 info->fbops = &platinumfb_ops;
319 info->pseudo_palette = pinfo->pseudo_palette;
320 info->flags = FBINFO_DEFAULT;
321 info->screen_base = pinfo->frame_buffer + 0x20;
322
323 fb_alloc_cmap(&info->cmap, 256, 0);
324
325 /* Fill fix common fields */
326 strcpy(info->fix.id, "platinum");
327 info->fix.mmio_start = pinfo->platinum_regs_phys;
328 info->fix.mmio_len = 0x1000;
329 info->fix.type = FB_TYPE_PACKED_PIXELS;
330 info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
331 info->fix.smem_len = pinfo->total_vram - 0x20;
332 info->fix.ywrapstep = 0;
333 info->fix.xpanstep = 0;
334 info->fix.ypanstep = 0;
335 info->fix.type_aux = 0;
336 info->fix.accel = FB_ACCEL_NONE;
337}
338
339
48c68c4f 340static int platinum_init_fb(struct fb_info *info)
1da177e4
LT		 341{
342 struct fb_info_platinum *pinfo = info->par;
343 struct fb_var_screeninfo var;
344 int sense, rc;
345
346 sense = read_platinum_sense(pinfo);
347 printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
1da177e4 348 if (default_vmode == VMODE_NVRAM) {
f3f6f9aa 349#ifdef CONFIG_NVRAM
1da177e4
LT		 350 default_vmode = nvram_read_byte(NV_VMODE);
351 if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
352 !platinum_reg_init[default_vmode-1])
f3f6f9aa 353#endif
1da177e4
LT		 354 default_vmode = VMODE_CHOOSE;
355 }
356 if (default_vmode == VMODE_CHOOSE) {
357 default_vmode = mac_map_monitor_sense(sense);
358 }
359 if (default_vmode <= 0 || default_vmode > VMODE_MAX)
360 default_vmode = VMODE_640_480_60;
f3f6f9aa 361#ifdef CONFIG_NVRAM
1da177e4
LT		 362 if (default_cmode == CMODE_NVRAM)
363 default_cmode = nvram_read_byte(NV_CMODE);
f3f6f9aa 364#endif
1da177e4
LT		 365 if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
366 default_cmode = CMODE_8;
367 /*
368 * Reduce the pixel size if we don't have enough VRAM.
369 */
370 while(default_cmode > CMODE_8 &&
371 platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
372 default_cmode--;
373
374 printk("platinumfb: Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
375
376 /* Setup default var */
377 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
378 /* This shouldn't happen! */
379 printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
380try_again:
381 default_vmode = VMODE_640_480_60;
382 default_cmode = CMODE_8;
383 if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
384 printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
385 return -ENXIO;
386 }
387 }
388
389 /* Initialize info structure */
390 platinum_init_info(info, pinfo);
391
392 /* Apply default var */
393 info->var = var;
394 var.activate = FB_ACTIVATE_NOW;
395 rc = fb_set_var(info, &var);
396 if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
397 goto try_again;
398
399 /* Register with fbdev layer */
400 rc = register_framebuffer(info);
401 if (rc < 0)
402 return rc;
403
31b6780c 404 fb_info(info, "Apple Platinum frame buffer device\n");
1da177e4
LT		 405
406 return 0;
407}
408
409/*
410 * Get the monitor sense value.
411 * Note that this can be called before calibrate_delay,
412 * so we can't use udelay.
413 */
414static int read_platinum_sense(struct fb_info_platinum *info)
415{
416 volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
417 int sense;
418
419 out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
420 __delay(2000);
421 sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
422
423 /* drive each sense line low in turn and collect the other 2 */
424 out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
425 __delay(2000);
426 sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
427 out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
428 __delay(2000);
429 sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
430 sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
431 out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
432 __delay(2000);
433 sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
434
435 out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
436
437 return sense;
438}
439
440/*
441 * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
442 * It also updates the var structure to the actual mode data obtained
443 */
444static int platinum_var_to_par(struct fb_var_screeninfo *var,
445 struct fb_info_platinum *pinfo,
446 int check_only)
447{
448 int vmode, cmode;
449
450 if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
451 printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
452 printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
453 printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
454 printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
455 printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
456 printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
457 printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
458 printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
459 return -EINVAL;
460 }
461
462 if (!platinum_reg_init[vmode-1]) {
463 printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
464 return -EINVAL;
465 }
466
467 if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
468 printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
469 return -EINVAL;
470 }
471
472 if (mac_vmode_to_var(vmode, cmode, var))
473 return -EINVAL;
474
475 if (check_only)
476 return 0;
477
478 pinfo->vmode = vmode;
479 pinfo->cmode = cmode;
480 pinfo->xres = vmode_attrs[vmode-1].hres;
481 pinfo->yres = vmode_attrs[vmode-1].vres;
482 pinfo->xoffset = 0;
483 pinfo->yoffset = 0;
484 pinfo->vxres = pinfo->xres;
485 pinfo->vyres = pinfo->yres;
486
487 return 0;
488}
489
490
491/*
75e1b6a8 492 * Parse user specified options (`video=platinumfb:')
1da177e4 493 */
cc5d0189 494static int __init platinumfb_setup(char *options)
1da177e4
LT		 495{
496 char *this_opt;
497
498 if (!options || !*options)
499 return 0;
500
501 while ((this_opt = strsep(&options, ",")) != NULL) {
502 if (!strncmp(this_opt, "vmode:", 6)) {
503 int vmode = simple_strtoul(this_opt+6, NULL, 0);
504 if (vmode > 0 && vmode <= VMODE_MAX)
505 default_vmode = vmode;
506 } else if (!strncmp(this_opt, "cmode:", 6)) {
507 int depth = simple_strtoul(this_opt+6, NULL, 0);
508 switch (depth) {
509 case 0:
510 case 8:
511 default_cmode = CMODE_8;
512 break;
513 case 15:
514 case 16:
515 default_cmode = CMODE_16;
516 break;
517 case 24:
518 case 32:
519 default_cmode = CMODE_32;
520 break;
521 }
522 }
523 }
524 return 0;
525}
526
527#ifdef __powerpc__
528#define invalidate_cache(addr) \
529 asm volatile("eieio; dcbf 0,%1" \
530 : "=m" (*(addr)) : "r" (addr) : "memory");
531#else
532#define invalidate_cache(addr)
533#endif
534
48c68c4f 535static int platinumfb_probe(struct platform_device* odev)
1da177e4 536{
61c7a080 537 struct device_node *dp = odev->dev.of_node;
1da177e4
LT		 538 struct fb_info *info;
539 struct fb_info_platinum *pinfo;
1da177e4 540 volatile __u8 *fbuffer;
cc5d0189 541 int bank0, bank1, bank2, bank3, rc;
1da177e4 542
4c2a54b0 543 dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
1da177e4
LT		 544
545 info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
4c2a54b0
BH		 546 if (info == NULL) {
547 dev_err(&odev->dev, "Failed to allocate fbdev !\n");
1da177e4 548 return -ENOMEM;
4c2a54b0 549 }
1da177e4
LT		 550 pinfo = info->par;
551
cc5d0189
BH		 552 if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
553 of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
4c2a54b0 554 dev_err(&odev->dev, "Can't get resources\n");
cc5d0189
BH		 555 framebuffer_release(info);
556 return -ENXIO;
557 }
4c2a54b0
BH		 558 dev_dbg(&odev->dev, " registers : 0x%llx...0x%llx\n",
559 (unsigned long long)pinfo->rsrc_reg.start,
560 (unsigned long long)pinfo->rsrc_reg.end);
561 dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
562 (unsigned long long)pinfo->rsrc_fb.start,
563 (unsigned long long)pinfo->rsrc_fb.end);
564
565 /* Do not try to request register space, they overlap with the
566 * northbridge and that can fail. Only request framebuffer
567 */
cc5d0189 568 if (!request_mem_region(pinfo->rsrc_fb.start,
28f65c11 569 resource_size(&pinfo->rsrc_fb),
cc5d0189 570 "platinumfb framebuffer")) {
4c2a54b0 571 printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
cc5d0189
BH		 572 framebuffer_release(info);
573 return -ENXIO;
574 }
575
576 /* frame buffer - map only 4MB */
577 pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
e04e3950 578 pinfo->frame_buffer = ioremap_wt(pinfo->rsrc_fb.start, 0x400000);
cc5d0189
BH		 579 pinfo->base_frame_buffer = pinfo->frame_buffer;
580
581 /* registers */
582 pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
583 pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
1da177e4
LT		 584
585 pinfo->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */
586 request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
587 pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
588
589 /* Grok total video ram */
590 out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
591 out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011); /* select max vram */
592 out_be32(&pinfo->platinum_regs->reg[24].r, 0); /* switch in vram */
593
594 fbuffer = pinfo->base_frame_buffer;
595 fbuffer[0x100000] = 0x34;
596 fbuffer[0x100008] = 0x0;
597 invalidate_cache(&fbuffer[0x100000]);
598 fbuffer[0x200000] = 0x56;
599 fbuffer[0x200008] = 0x0;
600 invalidate_cache(&fbuffer[0x200000]);
601 fbuffer[0x300000] = 0x78;
602 fbuffer[0x300008] = 0x0;
603 invalidate_cache(&fbuffer[0x300000]);
604 bank0 = 1; /* builtin 1MB vram, always there */
605 bank1 = fbuffer[0x100000] == 0x34;
606 bank2 = fbuffer[0x200000] == 0x56;
607 bank3 = fbuffer[0x300000] == 0x78;
608 pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
4c2a54b0
BH		 609 printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
610 (unsigned int) (pinfo->total_vram / 1024 / 1024),
1da177e4
LT		 611 bank3, bank2, bank1, bank0);
612
613 /*
614 * Try to determine whether we have an old or a new DACula.
615 */
616 out_8(&pinfo->cmap_regs->addr, 0x40);
617 pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
618 switch (pinfo->dactype) {
619 case 0x3c:
620 pinfo->clktype = 1;
621 printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
622 break;
623 case 0x84:
624 pinfo->clktype = 0;
625 printk(KERN_INFO "platinumfb: DACula type 0x84\n");
626 break;
627 default:
628 pinfo->clktype = 0;
629 printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
630 break;
631 }
632 dev_set_drvdata(&odev->dev, info);
633
634 rc = platinum_init_fb(info);
635 if (rc != 0) {
2b7574da
AL		 636 iounmap(pinfo->frame_buffer);
637 iounmap(pinfo->platinum_regs);
638 iounmap(pinfo->cmap_regs);
1da177e4
LT		 639 framebuffer_release(info);
640 }
641
642 return rc;
643}
644
48c68c4f 645static int platinumfb_remove(struct platform_device* odev)
1da177e4
LT		 646{
647 struct fb_info *info = dev_get_drvdata(&odev->dev);
648 struct fb_info_platinum *pinfo = info->par;
1da177e4
LT		 649
650 unregister_framebuffer (info);
651
652 /* Unmap frame buffer and registers */
4c2a54b0
BH		 653 iounmap(pinfo->frame_buffer);
654 iounmap(pinfo->platinum_regs);
655 iounmap(pinfo->cmap_regs);
656
cc5d0189 657 release_mem_region(pinfo->rsrc_fb.start,
28f65c11 658 resource_size(&pinfo->rsrc_fb));
4c2a54b0 659
1da177e4 660 release_mem_region(pinfo->cmap_regs_phys, 0x1000);
1da177e4
LT		 661
662 framebuffer_release(info);
663
664 return 0;
665}
666
5e655772 667static struct of_device_id platinumfb_match[] =
1da177e4
LT		 668{
669 {
670 .name = "platinum",
1da177e4
LT		 671 },
672 {},
673};
674
28541d0f 675static struct platform_driver platinum_driver =
1da177e4 676{
4018294b
GL		 677 .driver = {
678 .name = "platinumfb",
4018294b
GL		 679 .of_match_table = platinumfb_match,
680 },
1da177e4 681 .probe = platinumfb_probe,
48c68c4f 682 .remove = platinumfb_remove,
1da177e4
LT		 683};
684
cc5d0189 685static int __init platinumfb_init(void)
1da177e4
LT		 686{
687#ifndef MODULE
688 char *option = NULL;
689
690 if (fb_get_options("platinumfb", &option))
691 return -ENODEV;
692 platinumfb_setup(option);
693#endif
28541d0f 694 platform_driver_register(&platinum_driver);
1da177e4
LT		 695
696 return 0;
697}
698
cc5d0189 699static void __exit platinumfb_exit(void)
1da177e4 700{
28541d0f 701 platform_driver_unregister(&platinum_driver);
1da177e4
LT		 702}
703
704MODULE_LICENSE("GPL");
705MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
706module_init(platinumfb_init);
707
708#ifdef MODULE
709module_exit(platinumfb_exit);
710#endif
Linux 6.x block layer and io_uring tree(s)