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Linux-2.6.12-rc2
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / offb.c
1 /*
2 * linux/drivers/video/offb.c -- Open Firmware based frame buffer device
3 *
4 * Copyright (C) 1997 Geert Uytterhoeven
5 *
6 * This driver is partly based on the PowerMac console driver:
7 *
8 * Copyright (C) 1996 Paul Mackerras
9 *
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file COPYING in the main directory of this archive for
12 * more details.
13 */
14
15 #include <linux/config.h>
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/errno.h>
19 #include <linux/string.h>
20 #include <linux/mm.h>
21 #include <linux/tty.h>
22 #include <linux/slab.h>
23 #include <linux/vmalloc.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/fb.h>
27 #include <linux/init.h>
28 #include <linux/ioport.h>
29 #include <asm/io.h>
30 #include <asm/prom.h>
31
32 #ifdef CONFIG_PPC64
33 #include <asm/pci-bridge.h>
34 #endif
35
36 #ifdef CONFIG_PPC32
37 #include <asm/bootx.h>
38 #endif
39
40 #include "macmodes.h"
41
42 /* Supported palette hacks */
43 enum {
44 cmap_unknown,
45 cmap_m64, /* ATI Mach64 */
46 cmap_r128, /* ATI Rage128 */
47 cmap_M3A, /* ATI Rage Mobility M3 Head A */
48 cmap_M3B, /* ATI Rage Mobility M3 Head B */
49 cmap_radeon, /* ATI Radeon */
50 cmap_gxt2000, /* IBM GXT2000 */
51 };
52
53 struct offb_par {
54 volatile void __iomem *cmap_adr;
55 volatile void __iomem *cmap_data;
56 int cmap_type;
57 int blanked;
58 };
59
60 struct offb_par default_par;
61
62 /*
63 * Interface used by the world
64 */
65
66 int offb_init(void);
67
68 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
69 u_int transp, struct fb_info *info);
70 static int offb_blank(int blank, struct fb_info *info);
71
72 #ifdef CONFIG_PPC32
73 extern boot_infos_t *boot_infos;
74 #endif
75
76 static void offb_init_nodriver(struct device_node *);
77 static void offb_init_fb(const char *name, const char *full_name,
78 int width, int height, int depth, int pitch,
79 unsigned long address, struct device_node *dp);
80
81 static struct fb_ops offb_ops = {
82 .owner = THIS_MODULE,
83 .fb_setcolreg = offb_setcolreg,
84 .fb_blank = offb_blank,
85 .fb_fillrect = cfb_fillrect,
86 .fb_copyarea = cfb_copyarea,
87 .fb_imageblit = cfb_imageblit,
88 .fb_cursor = soft_cursor,
89 };
90
91 /*
92 * Set a single color register. The values supplied are already
93 * rounded down to the hardware's capabilities (according to the
94 * entries in the var structure). Return != 0 for invalid regno.
95 */
96
97 static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
98 u_int transp, struct fb_info *info)
99 {
100 struct offb_par *par = (struct offb_par *) info->par;
101
102 if (!par->cmap_adr || regno > 255)
103 return 1;
104
105 red >>= 8;
106 green >>= 8;
107 blue >>= 8;
108
109 switch (par->cmap_type) {
110 case cmap_m64:
111 writeb(regno, par->cmap_adr);
112 writeb(red, par->cmap_data);
113 writeb(green, par->cmap_data);
114 writeb(blue, par->cmap_data);
115 break;
116 case cmap_M3A:
117 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
118 out_le32(par->cmap_adr + 0x58,
119 in_le32(par->cmap_adr + 0x58) & ~0x20);
120 case cmap_r128:
121 /* Set palette index & data */
122 out_8(par->cmap_adr + 0xb0, regno);
123 out_le32(par->cmap_adr + 0xb4,
124 (red << 16 | green << 8 | blue));
125 break;
126 case cmap_M3B:
127 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
128 out_le32(par->cmap_adr + 0x58,
129 in_le32(par->cmap_adr + 0x58) | 0x20);
130 /* Set palette index & data */
131 out_8(par->cmap_adr + 0xb0, regno);
132 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
133 break;
134 case cmap_radeon:
135 /* Set palette index & data (could be smarter) */
136 out_8(par->cmap_adr + 0xb0, regno);
137 out_le32(par->cmap_adr + 0xb4, (red << 16 | green << 8 | blue));
138 break;
139 case cmap_gxt2000:
140 out_le32((unsigned __iomem *) par->cmap_adr + regno,
141 (red << 16 | green << 8 | blue));
142 break;
143 }
144
145 if (regno < 16)
146 switch (info->var.bits_per_pixel) {
147 case 16:
148 ((u16 *) (info->pseudo_palette))[regno] =
149 (regno << 10) | (regno << 5) | regno;
150 break;
151 case 32:
152 {
153 int i = (regno << 8) | regno;
154 ((u32 *) (info->pseudo_palette))[regno] =
155 (i << 16) | i;
156 break;
157 }
158 }
159 return 0;
160 }
161
162 /*
163 * Blank the display.
164 */
165
166 static int offb_blank(int blank, struct fb_info *info)
167 {
168 struct offb_par *par = (struct offb_par *) info->par;
169 int i, j;
170
171 if (!par->cmap_adr)
172 return 0;
173
174 if (!par->blanked)
175 if (!blank)
176 return 0;
177
178 par->blanked = blank;
179
180 if (blank)
181 for (i = 0; i < 256; i++) {
182 switch (par->cmap_type) {
183 case cmap_m64:
184 writeb(i, par->cmap_adr);
185 for (j = 0; j < 3; j++)
186 writeb(0, par->cmap_data);
187 break;
188 case cmap_M3A:
189 /* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
190 out_le32(par->cmap_adr + 0x58,
191 in_le32(par->cmap_adr + 0x58) & ~0x20);
192 case cmap_r128:
193 /* Set palette index & data */
194 out_8(par->cmap_adr + 0xb0, i);
195 out_le32(par->cmap_adr + 0xb4, 0);
196 break;
197 case cmap_M3B:
198 /* Set PALETTE_ACCESS_CNTL in DAC_CNTL */
199 out_le32(par->cmap_adr + 0x58,
200 in_le32(par->cmap_adr + 0x58) | 0x20);
201 /* Set palette index & data */
202 out_8(par->cmap_adr + 0xb0, i);
203 out_le32(par->cmap_adr + 0xb4, 0);
204 break;
205 case cmap_radeon:
206 out_8(par->cmap_adr + 0xb0, i);
207 out_le32(par->cmap_adr + 0xb4, 0);
208 break;
209 case cmap_gxt2000:
210 out_le32((unsigned __iomem *) par->cmap_adr + i,
211 0);
212 break;
213 }
214 } else
215 fb_set_cmap(&info->cmap, info);
216 return 0;
217 }
218
219 /*
220 * Initialisation
221 */
222
223 int __init offb_init(void)
224 {
225 struct device_node *dp = NULL, *boot_disp = NULL;
226 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
227 struct device_node *macos_display = NULL;
228 #endif
229 if (fb_get_options("offb", NULL))
230 return -ENODEV;
231
232 #if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
233 /* If we're booted from BootX... */
234 if (boot_infos != 0) {
235 unsigned long addr =
236 (unsigned long) boot_infos->dispDeviceBase;
237 /* find the device node corresponding to the macos display */
238 while ((dp = of_find_node_by_type(dp, "display"))) {
239 int i;
240 /*
241 * Grrr... It looks like the MacOS ATI driver
242 * munges the assigned-addresses property (but
243 * the AAPL,address value is OK).
244 */
245 if (strncmp(dp->name, "ATY,", 4) == 0
246 && dp->n_addrs == 1) {
247 unsigned int *ap =
248 (unsigned int *) get_property(dp,
249 "AAPL,address",
250 NULL);
251 if (ap != NULL) {
252 dp->addrs[0].address = *ap;
253 dp->addrs[0].size = 0x01000000;
254 }
255 }
256
257 /*
258 * The LTPro on the Lombard powerbook has no addresses
259 * on the display nodes, they are on their parent.
260 */
261 if (dp->n_addrs == 0
262 && device_is_compatible(dp, "ATY,264LTPro")) {
263 int na;
264 unsigned int *ap = (unsigned int *)
265 get_property(dp, "AAPL,address", &na);
266 if (ap != 0)
267 for (na /= sizeof(unsigned int);
268 na > 0; --na, ++ap)
269 if (*ap <= addr
270 && addr <
271 *ap + 0x1000000)
272 goto foundit;
273 }
274
275 /*
276 * See if the display address is in one of the address
277 * ranges for this display.
278 */
279 for (i = 0; i < dp->n_addrs; ++i) {
280 if (dp->addrs[i].address <= addr
281 && addr <
282 dp->addrs[i].address +
283 dp->addrs[i].size)
284 break;
285 }
286 if (i < dp->n_addrs) {
287 foundit:
288 printk(KERN_INFO "MacOS display is %s\n",
289 dp->full_name);
290 macos_display = dp;
291 break;
292 }
293 }
294
295 /* initialize it */
296 offb_init_fb(macos_display ? macos_display->
297 name : "MacOS display",
298 macos_display ? macos_display->
299 full_name : "MacOS display",
300 boot_infos->dispDeviceRect[2],
301 boot_infos->dispDeviceRect[3],
302 boot_infos->dispDeviceDepth,
303 boot_infos->dispDeviceRowBytes, addr, NULL);
304 }
305 #endif /* defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32) */
306
307 for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
308 if (get_property(dp, "linux,opened", NULL) &&
309 get_property(dp, "linux,boot-display", NULL)) {
310 boot_disp = dp;
311 offb_init_nodriver(dp);
312 }
313 }
314 for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
315 if (get_property(dp, "linux,opened", NULL) &&
316 dp != boot_disp)
317 offb_init_nodriver(dp);
318 }
319
320 return 0;
321 }
322
323
324 static void __init offb_init_nodriver(struct device_node *dp)
325 {
326 int *pp, i;
327 unsigned int len;
328 int width = 640, height = 480, depth = 8, pitch;
329 unsigned *up;
330 unsigned long address;
331
332 if ((pp = (int *) get_property(dp, "depth", &len)) != NULL
333 && len == sizeof(int))
334 depth = *pp;
335 if ((pp = (int *) get_property(dp, "width", &len)) != NULL
336 && len == sizeof(int))
337 width = *pp;
338 if ((pp = (int *) get_property(dp, "height", &len)) != NULL
339 && len == sizeof(int))
340 height = *pp;
341 if ((pp = (int *) get_property(dp, "linebytes", &len)) != NULL
342 && len == sizeof(int)) {
343 pitch = *pp;
344 if (pitch == 1)
345 pitch = 0x1000;
346 } else
347 pitch = width;
348 if ((up = (unsigned *) get_property(dp, "address", &len)) != NULL
349 && len == sizeof(unsigned))
350 address = (u_long) * up;
351 else {
352 for (i = 0; i < dp->n_addrs; ++i)
353 if (dp->addrs[i].size >=
354 pitch * height * depth / 8)
355 break;
356 if (i >= dp->n_addrs) {
357 printk(KERN_ERR
358 "no framebuffer address found for %s\n",
359 dp->full_name);
360 return;
361 }
362
363 address = (u_long) dp->addrs[i].address;
364
365 #ifdef CONFIG_PPC64
366 address += dp->phb->pci_mem_offset;
367 #endif
368
369 /* kludge for valkyrie */
370 if (strcmp(dp->name, "valkyrie") == 0)
371 address += 0x1000;
372 }
373 offb_init_fb(dp->name, dp->full_name, width, height, depth,
374 pitch, address, dp);
375
376 }
377
378 static void __init offb_init_fb(const char *name, const char *full_name,
379 int width, int height, int depth,
380 int pitch, unsigned long address,
381 struct device_node *dp)
382 {
383 unsigned long res_size = pitch * height * depth / 8;
384 struct offb_par *par = &default_par;
385 unsigned long res_start = address;
386 struct fb_fix_screeninfo *fix;
387 struct fb_var_screeninfo *var;
388 struct fb_info *info;
389 int size;
390
391 if (!request_mem_region(res_start, res_size, "offb"))
392 return;
393
394 printk(KERN_INFO
395 "Using unsupported %dx%d %s at %lx, depth=%d, pitch=%d\n",
396 width, height, name, address, depth, pitch);
397 if (depth != 8 && depth != 16 && depth != 32) {
398 printk(KERN_ERR "%s: can't use depth = %d\n", full_name,
399 depth);
400 release_mem_region(res_start, res_size);
401 return;
402 }
403
404 size = sizeof(struct fb_info) + sizeof(u32) * 17;
405
406 info = kmalloc(size, GFP_ATOMIC);
407
408 if (info == 0) {
409 release_mem_region(res_start, res_size);
410 return;
411 }
412 memset(info, 0, size);
413
414 fix = &info->fix;
415 var = &info->var;
416
417 strcpy(fix->id, "OFfb ");
418 strncat(fix->id, name, sizeof(fix->id) - sizeof("OFfb "));
419 fix->id[sizeof(fix->id) - 1] = '\0';
420
421 var->xres = var->xres_virtual = width;
422 var->yres = var->yres_virtual = height;
423 fix->line_length = pitch;
424
425 fix->smem_start = address;
426 fix->smem_len = pitch * height;
427 fix->type = FB_TYPE_PACKED_PIXELS;
428 fix->type_aux = 0;
429
430 par->cmap_type = cmap_unknown;
431 if (depth == 8) {
432 /* XXX kludge for ati */
433 if (dp && !strncmp(name, "ATY,Rage128", 11)) {
434 unsigned long regbase = dp->addrs[2].address;
435 par->cmap_adr = ioremap(regbase, 0x1FFF);
436 par->cmap_type = cmap_r128;
437 } else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
438 || !strncmp(name, "ATY,RageM3p12A", 14))) {
439 unsigned long regbase =
440 dp->parent->addrs[2].address;
441 par->cmap_adr = ioremap(regbase, 0x1FFF);
442 par->cmap_type = cmap_M3A;
443 } else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
444 unsigned long regbase =
445 dp->parent->addrs[2].address;
446 par->cmap_adr = ioremap(regbase, 0x1FFF);
447 par->cmap_type = cmap_M3B;
448 } else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
449 unsigned long regbase = dp->addrs[1].address;
450 par->cmap_adr = ioremap(regbase, 0x1FFF);
451 par->cmap_type = cmap_radeon;
452 } else if (!strncmp(name, "ATY,", 4)) {
453 unsigned long base = address & 0xff000000UL;
454 par->cmap_adr =
455 ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
456 par->cmap_data = par->cmap_adr + 1;
457 par->cmap_type = cmap_m64;
458 } else if (device_is_compatible(dp, "pci1014,b7")) {
459 unsigned long regbase = dp->addrs[0].address;
460 par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
461 par->cmap_type = cmap_gxt2000;
462 }
463 fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
464 : FB_VISUAL_STATIC_PSEUDOCOLOR;
465 } else
466 fix->visual = /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
467 : */ FB_VISUAL_TRUECOLOR;
468
469 var->xoffset = var->yoffset = 0;
470 var->bits_per_pixel = depth;
471 switch (depth) {
472 case 8:
473 var->bits_per_pixel = 8;
474 var->red.offset = 0;
475 var->red.length = 8;
476 var->green.offset = 0;
477 var->green.length = 8;
478 var->blue.offset = 0;
479 var->blue.length = 8;
480 var->transp.offset = 0;
481 var->transp.length = 0;
482 break;
483 case 16: /* RGB 555 */
484 var->bits_per_pixel = 16;
485 var->red.offset = 10;
486 var->red.length = 5;
487 var->green.offset = 5;
488 var->green.length = 5;
489 var->blue.offset = 0;
490 var->blue.length = 5;
491 var->transp.offset = 0;
492 var->transp.length = 0;
493 break;
494 case 32: /* RGB 888 */
495 var->bits_per_pixel = 32;
496 var->red.offset = 16;
497 var->red.length = 8;
498 var->green.offset = 8;
499 var->green.length = 8;
500 var->blue.offset = 0;
501 var->blue.length = 8;
502 var->transp.offset = 24;
503 var->transp.length = 8;
504 break;
505 }
506 var->red.msb_right = var->green.msb_right = var->blue.msb_right =
507 var->transp.msb_right = 0;
508 var->grayscale = 0;
509 var->nonstd = 0;
510 var->activate = 0;
511 var->height = var->width = -1;
512 var->pixclock = 10000;
513 var->left_margin = var->right_margin = 16;
514 var->upper_margin = var->lower_margin = 16;
515 var->hsync_len = var->vsync_len = 8;
516 var->sync = 0;
517 var->vmode = FB_VMODE_NONINTERLACED;
518
519 info->fbops = &offb_ops;
520 info->screen_base = ioremap(address, fix->smem_len);
521 info->par = par;
522 info->pseudo_palette = (void *) (info + 1);
523 info->flags = FBINFO_DEFAULT;
524
525 fb_alloc_cmap(&info->cmap, 256, 0);
526
527 if (register_framebuffer(info) < 0) {
528 kfree(info);
529 release_mem_region(res_start, res_size);
530 return;
531 }
532
533 printk(KERN_INFO "fb%d: Open Firmware frame buffer device on %s\n",
534 info->node, full_name);
535 }
536
537 module_init(offb_init);
538 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)