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[PATCH] w1: Make w1 connector notifications depend on connector.
[linux-2.6/verdex.git] / drivers / video / sgivwfb.c
blob2e6df1fcb2b926e875508bc8ff3181bb4d89a7bc
1 /*
2 * linux/drivers/video/sgivwfb.c -- SGI DBE frame buffer device
3 *
4 * Copyright (C) 1999 Silicon Graphics, Inc.
5 * Jeffrey Newquist, newquist@engr.sgi.som
6 *
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file COPYING in the main directory of this archive for
9 * more details.
10 */
11
12 #include <linux/config.h>
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/mm.h>
16 #include <linux/errno.h>
17 #include <linux/delay.h>
18 #include <linux/fb.h>
19 #include <linux/init.h>
20 #include <linux/ioport.h>
21 #include <linux/platform_device.h>
22
23 #include <asm/io.h>
24 #include <asm/mtrr.h>
25
26 #define INCLUDE_TIMING_TABLE_DATA
27 #define DBE_REG_BASE par->regs
28 #include <video/sgivw.h>
29
30 struct sgivw_par {
31 struct asregs *regs;
32 u32 cmap_fifo;
33 u_long timing_num;
34 };
35
36 #define FLATPANEL_SGI_1600SW 5
37
38 /*
39 * RAM we reserve for the frame buffer. This defines the maximum screen
40 * size
41 *
42 * The default can be overridden if the driver is compiled as a module
43 */
44
45 /* set by arch/i386/kernel/setup.c */
46 extern unsigned long sgivwfb_mem_phys;
47 extern unsigned long sgivwfb_mem_size;
48
49 static int ypan = 0;
50 static int ywrap = 0;
51
52 static int flatpanel_id = -1;
53
54 static struct fb_fix_screeninfo sgivwfb_fix __initdata = {
55 .id = "SGI Vis WS FB",
56 .type = FB_TYPE_PACKED_PIXELS,
57 .visual = FB_VISUAL_PSEUDOCOLOR,
58 .mmio_start = DBE_REG_PHYS,
59 .mmio_len = DBE_REG_SIZE,
60 .accel = FB_ACCEL_NONE,
61 .line_length = 640,
62 };
63
64 static struct fb_var_screeninfo sgivwfb_var __initdata = {
65 /* 640x480, 8 bpp */
66 .xres = 640,
67 .yres = 480,
68 .xres_virtual = 640,
69 .yres_virtual = 480,
70 .bits_per_pixel = 8,
71 .red = { 0, 8, 0 },
72 .green = { 0, 8, 0 },
73 .blue = { 0, 8, 0 },
74 .height = -1,
75 .width = -1,
76 .pixclock = 20000,
77 .left_margin = 64,
78 .right_margin = 64,
79 .upper_margin = 32,
80 .lower_margin = 32,
81 .hsync_len = 64,
82 .vsync_len = 2,
83 .vmode = FB_VMODE_NONINTERLACED
84 };
85
86 static struct fb_var_screeninfo sgivwfb_var1600sw __initdata = {
87 /* 1600x1024, 8 bpp */
88 .xres = 1600,
89 .yres = 1024,
90 .xres_virtual = 1600,
91 .yres_virtual = 1024,
92 .bits_per_pixel = 8,
93 .red = { 0, 8, 0 },
94 .green = { 0, 8, 0 },
95 .blue = { 0, 8, 0 },
96 .height = -1,
97 .width = -1,
98 .pixclock = 9353,
99 .left_margin = 20,
100 .right_margin = 30,
101 .upper_margin = 37,
102 .lower_margin = 3,
103 .hsync_len = 20,
104 .vsync_len = 3,
105 .vmode = FB_VMODE_NONINTERLACED
106 };
107
108 /*
109 * Interface used by the world
110 */
111 int sgivwfb_init(void);
112
113 static int sgivwfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
114 static int sgivwfb_set_par(struct fb_info *info);
115 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
116 u_int blue, u_int transp,
117 struct fb_info *info);
118 static int sgivwfb_mmap(struct fb_info *info,
119 struct vm_area_struct *vma);
120
121 static struct fb_ops sgivwfb_ops = {
122 .owner = THIS_MODULE,
123 .fb_check_var = sgivwfb_check_var,
124 .fb_set_par = sgivwfb_set_par,
125 .fb_setcolreg = sgivwfb_setcolreg,
126 .fb_fillrect = cfb_fillrect,
127 .fb_copyarea = cfb_copyarea,
128 .fb_imageblit = cfb_imageblit,
129 .fb_mmap = sgivwfb_mmap,
130 };
131
132 /*
133 * Internal routines
134 */
135 static unsigned long bytes_per_pixel(int bpp)
136 {
137 switch (bpp) {
138 case 8:
139 return 1;
140 case 16:
141 return 2;
142 case 32:
143 return 4;
144 default:
145 printk(KERN_INFO "sgivwfb: unsupported bpp %d\n", bpp);
146 return 0;
147 }
148 }
149
150 static unsigned long get_line_length(int xres_virtual, int bpp)
151 {
152 return (xres_virtual * bytes_per_pixel(bpp));
153 }
154
155 /*
156 * Function: dbe_TurnOffDma
157 * Parameters: (None)
158 * Description: This should turn off the monitor and dbe. This is used
159 * when switching between the serial console and the graphics
160 * console.
161 */
162
163 static void dbe_TurnOffDma(struct sgivw_par *par)
164 {
165 unsigned int readVal;
166 int i;
167
168 // Check to see if things are already turned off:
169 // 1) Check to see if dbe is not using the internal dotclock.
170 // 2) Check to see if the xy counter in dbe is already off.
171
172 DBE_GETREG(ctrlstat, readVal);
173 if (GET_DBE_FIELD(CTRLSTAT, PCLKSEL, readVal) < 2)
174 return;
175
176 DBE_GETREG(vt_xy, readVal);
177 if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1)
178 return;
179
180 // Otherwise, turn off dbe
181
182 DBE_GETREG(ovr_control, readVal);
183 SET_DBE_FIELD(OVR_CONTROL, OVR_DMA_ENABLE, readVal, 0);
184 DBE_SETREG(ovr_control, readVal);
185 udelay(1000);
186 DBE_GETREG(frm_control, readVal);
187 SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, readVal, 0);
188 DBE_SETREG(frm_control, readVal);
189 udelay(1000);
190 DBE_GETREG(did_control, readVal);
191 SET_DBE_FIELD(DID_CONTROL, DID_DMA_ENABLE, readVal, 0);
192 DBE_SETREG(did_control, readVal);
193 udelay(1000);
194
195 // XXX HACK:
196 //
197 // This was necessary for GBE--we had to wait through two
198 // vertical retrace periods before the pixel DMA was
199 // turned off for sure. I've left this in for now, in
200 // case dbe needs it.
201
202 for (i = 0; i < 10000; i++) {
203 DBE_GETREG(frm_inhwctrl, readVal);
204 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) ==
205 0)
206 udelay(10);
207 else {
208 DBE_GETREG(ovr_inhwctrl, readVal);
209 if (GET_DBE_FIELD
210 (OVR_INHWCTRL, OVR_DMA_ENABLE, readVal) == 0)
211 udelay(10);
212 else {
213 DBE_GETREG(did_inhwctrl, readVal);
214 if (GET_DBE_FIELD
215 (DID_INHWCTRL, DID_DMA_ENABLE,
216 readVal) == 0)
217 udelay(10);
218 else
219 break;
220 }
221 }
222 }
223 }
224
225 /*
226 * Set the User Defined Part of the Display. Again if par use it to get
227 * real video mode.
228 */
229 static int sgivwfb_check_var(struct fb_var_screeninfo *var,
230 struct fb_info *info)
231 {
232 struct sgivw_par *par = (struct sgivw_par *)info->par;
233 struct dbe_timing_info *timing;
234 u_long line_length;
235 u_long min_mode;
236 int req_dot;
237 int test_mode;
238
239 /*
240 * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
241 * as FB_VMODE_SMOOTH_XPAN is only used internally
242 */
243
244 if (var->vmode & FB_VMODE_CONUPDATE) {
245 var->vmode |= FB_VMODE_YWRAP;
246 var->xoffset = info->var.xoffset;
247 var->yoffset = info->var.yoffset;
248 }
249
250 /* XXX FIXME - forcing var's */
251 var->xoffset = 0;
252 var->yoffset = 0;
253
254 /* Limit bpp to 8, 16, and 32 */
255 if (var->bits_per_pixel <= 8)
256 var->bits_per_pixel = 8;
257 else if (var->bits_per_pixel <= 16)
258 var->bits_per_pixel = 16;
259 else if (var->bits_per_pixel <= 32)
260 var->bits_per_pixel = 32;
261 else
262 return -EINVAL;
263
264 var->grayscale = 0; /* No grayscale for now */
265
266 /* determine valid resolution and timing */
267 for (min_mode = 0; min_mode < DBE_VT_SIZE; min_mode++) {
268 if (dbeVTimings[min_mode].width >= var->xres &&
269 dbeVTimings[min_mode].height >= var->yres)
270 break;
271 }
272
273 if (min_mode == DBE_VT_SIZE)
274 return -EINVAL; /* Resolution to high */
275
276 /* XXX FIXME - should try to pick best refresh rate */
277 /* for now, pick closest dot-clock within 3MHz */
278 req_dot = PICOS2KHZ(var->pixclock);
279 printk(KERN_INFO "sgivwfb: requested pixclock=%d ps (%d KHz)\n",
280 var->pixclock, req_dot);
281 test_mode = min_mode;
282 while (dbeVTimings[min_mode].width == dbeVTimings[test_mode].width) {
283 if (dbeVTimings[test_mode].cfreq + 3000 > req_dot)
284 break;
285 test_mode++;
286 }
287 if (dbeVTimings[min_mode].width != dbeVTimings[test_mode].width)
288 test_mode--;
289 min_mode = test_mode;
290 timing = &dbeVTimings[min_mode];
291 printk(KERN_INFO "sgivwfb: granted dot-clock=%d KHz\n", timing->cfreq);
292
293 /* Adjust virtual resolution, if necessary */
294 if (var->xres > var->xres_virtual || (!ywrap && !ypan))
295 var->xres_virtual = var->xres;
296 if (var->yres > var->yres_virtual || (!ywrap && !ypan))
297 var->yres_virtual = var->yres;
298
299 /*
300 * Memory limit
301 */
302 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
303 if (line_length * var->yres_virtual > sgivwfb_mem_size)
304 return -ENOMEM; /* Virtual resolution to high */
305
306 info->fix.line_length = line_length;
307
308 switch (var->bits_per_pixel) {
309 case 8:
310 var->red.offset = 0;
311 var->red.length = 8;
312 var->green.offset = 0;
313 var->green.length = 8;
314 var->blue.offset = 0;
315 var->blue.length = 8;
316 var->transp.offset = 0;
317 var->transp.length = 0;
318 break;
319 case 16: /* RGBA 5551 */
320 var->red.offset = 11;
321 var->red.length = 5;
322 var->green.offset = 6;
323 var->green.length = 5;
324 var->blue.offset = 1;
325 var->blue.length = 5;
326 var->transp.offset = 0;
327 var->transp.length = 0;
328 break;
329 case 32: /* RGB 8888 */
330 var->red.offset = 0;
331 var->red.length = 8;
332 var->green.offset = 8;
333 var->green.length = 8;
334 var->blue.offset = 16;
335 var->blue.length = 8;
336 var->transp.offset = 24;
337 var->transp.length = 8;
338 break;
339 }
340 var->red.msb_right = 0;
341 var->green.msb_right = 0;
342 var->blue.msb_right = 0;
343 var->transp.msb_right = 0;
344
345 /* set video timing information */
346 var->pixclock = KHZ2PICOS(timing->cfreq);
347 var->left_margin = timing->htotal - timing->hsync_end;
348 var->right_margin = timing->hsync_start - timing->width;
349 var->upper_margin = timing->vtotal - timing->vsync_end;
350 var->lower_margin = timing->vsync_start - timing->height;
351 var->hsync_len = timing->hsync_end - timing->hsync_start;
352 var->vsync_len = timing->vsync_end - timing->vsync_start;
353
354 /* Ouch. This breaks the rules but timing_num is only important if you
355 * change a video mode */
356 par->timing_num = min_mode;
357
358 printk(KERN_INFO "sgivwfb: new video mode xres=%d yres=%d bpp=%d\n",
359 var->xres, var->yres, var->bits_per_pixel);
360 printk(KERN_INFO " vxres=%d vyres=%d\n", var->xres_virtual,
361 var->yres_virtual);
362 return 0;
363 }
364
365 /*
366 * Setup flatpanel related registers.
367 */
368 static void sgivwfb_setup_flatpanel(struct sgivw_par *par, struct dbe_timing_info *currentTiming)
369 {
370 int fp_wid, fp_hgt, fp_vbs, fp_vbe;
371 u32 outputVal = 0;
372
373 SET_DBE_FIELD(VT_FLAGS, HDRV_INVERT, outputVal,
374 (currentTiming->flags & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1);
375 SET_DBE_FIELD(VT_FLAGS, VDRV_INVERT, outputVal,
376 (currentTiming->flags & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1);
377 DBE_SETREG(vt_flags, outputVal);
378
379 /* Turn on the flat panel */
380 switch (flatpanel_id) {
381 case FLATPANEL_SGI_1600SW:
382 fp_wid = 1600;
383 fp_hgt = 1024;
384 fp_vbs = 0;
385 fp_vbe = 1600;
386 currentTiming->pll_m = 4;
387 currentTiming->pll_n = 1;
388 currentTiming->pll_p = 0;
389 break;
390 default:
391 fp_wid = fp_hgt = fp_vbs = fp_vbe = 0xfff;
392 }
393
394 outputVal = 0;
395 SET_DBE_FIELD(FP_DE, FP_DE_ON, outputVal, fp_vbs);
396 SET_DBE_FIELD(FP_DE, FP_DE_OFF, outputVal, fp_vbe);
397 DBE_SETREG(fp_de, outputVal);
398 outputVal = 0;
399 SET_DBE_FIELD(FP_HDRV, FP_HDRV_OFF, outputVal, fp_wid);
400 DBE_SETREG(fp_hdrv, outputVal);
401 outputVal = 0;
402 SET_DBE_FIELD(FP_VDRV, FP_VDRV_ON, outputVal, 1);
403 SET_DBE_FIELD(FP_VDRV, FP_VDRV_OFF, outputVal, fp_hgt + 1);
404 DBE_SETREG(fp_vdrv, outputVal);
405 }
406
407 /*
408 * Set the hardware according to 'par'.
409 */
410 static int sgivwfb_set_par(struct fb_info *info)
411 {
412 struct sgivw_par *par = info->par;
413 int i, j, htmp, temp;
414 u32 readVal, outputVal;
415 int wholeTilesX, maxPixelsPerTileX;
416 int frmWrite1, frmWrite2, frmWrite3b;
417 struct dbe_timing_info *currentTiming; /* Current Video Timing */
418 int xpmax, ypmax; // Monitor resolution
419 int bytesPerPixel; // Bytes per pixel
420
421 currentTiming = &dbeVTimings[par->timing_num];
422 bytesPerPixel = bytes_per_pixel(info->var.bits_per_pixel);
423 xpmax = currentTiming->width;
424 ypmax = currentTiming->height;
425
426 /* dbe_InitGraphicsBase(); */
427 /* Turn on dotclock PLL */
428 DBE_SETREG(ctrlstat, 0x20000000);
429
430 dbe_TurnOffDma(par);
431
432 /* dbe_CalculateScreenParams(); */
433 maxPixelsPerTileX = 512 / bytesPerPixel;
434 wholeTilesX = xpmax / maxPixelsPerTileX;
435 if (wholeTilesX * maxPixelsPerTileX < xpmax)
436 wholeTilesX++;
437
438 printk(KERN_DEBUG "sgivwfb: pixPerTile=%d wholeTilesX=%d\n",
439 maxPixelsPerTileX, wholeTilesX);
440
441 /* dbe_InitGammaMap(); */
442 udelay(10);
443
444 for (i = 0; i < 256; i++) {
445 DBE_ISETREG(gmap, i, (i << 24) | (i << 16) | (i << 8));
446 }
447
448 /* dbe_TurnOn(); */
449 DBE_GETREG(vt_xy, readVal);
450 if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1) {
451 DBE_SETREG(vt_xy, 0x00000000);
452 udelay(1);
453 } else
454 dbe_TurnOffDma(par);
455
456 /* dbe_Initdbe(); */
457 for (i = 0; i < 256; i++) {
458 for (j = 0; j < 100; j++) {
459 DBE_GETREG(cm_fifo, readVal);
460 if (readVal != 0x00000000)
461 break;
462 else
463 udelay(10);
464 }
465
466 // DBE_ISETREG(cmap, i, 0x00000000);
467 DBE_ISETREG(cmap, i, (i << 8) | (i << 16) | (i << 24));
468 }
469
470 /* dbe_InitFramebuffer(); */
471 frmWrite1 = 0;
472 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_WIDTH_TILE, frmWrite1,
473 wholeTilesX);
474 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_RHS, frmWrite1, 0);
475
476 switch (bytesPerPixel) {
477 case 1:
478 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
479 DBE_FRM_DEPTH_8);
480 break;
481 case 2:
482 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
483 DBE_FRM_DEPTH_16);
484 break;
485 case 4:
486 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
487 DBE_FRM_DEPTH_32);
488 break;
489 }
490
491 frmWrite2 = 0;
492 SET_DBE_FIELD(FRM_SIZE_PIXEL, FB_HEIGHT_PIX, frmWrite2, ypmax);
493
494 // Tell dbe about the framebuffer location and type
495 // XXX What format is the FRM_TILE_PTR?? 64K aligned address?
496 frmWrite3b = 0;
497 SET_DBE_FIELD(FRM_CONTROL, FRM_TILE_PTR, frmWrite3b,
498 sgivwfb_mem_phys >> 9);
499 SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, frmWrite3b, 1);
500 SET_DBE_FIELD(FRM_CONTROL, FRM_LINEAR, frmWrite3b, 1);
501
502 /* Initialize DIDs */
503
504 outputVal = 0;
505 switch (bytesPerPixel) {
506 case 1:
507 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_I8);
508 break;
509 case 2:
510 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGBA5);
511 break;
512 case 4:
513 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGB8);
514 break;
515 }
516 SET_DBE_FIELD(WID, BUF, outputVal, DBE_BMODE_BOTH);
517
518 for (i = 0; i < 32; i++) {
519 DBE_ISETREG(mode_regs, i, outputVal);
520 }
521
522 /* dbe_InitTiming(); */
523 DBE_SETREG(vt_intr01, 0xffffffff);
524 DBE_SETREG(vt_intr23, 0xffffffff);
525
526 DBE_GETREG(dotclock, readVal);
527 DBE_SETREG(dotclock, readVal & 0xffff);
528
529 DBE_SETREG(vt_xymax, 0x00000000);
530 outputVal = 0;
531 SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_ON, outputVal,
532 currentTiming->vsync_start);
533 SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_OFF, outputVal,
534 currentTiming->vsync_end);
535 DBE_SETREG(vt_vsync, outputVal);
536 outputVal = 0;
537 SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_ON, outputVal,
538 currentTiming->hsync_start);
539 SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_OFF, outputVal,
540 currentTiming->hsync_end);
541 DBE_SETREG(vt_hsync, outputVal);
542 outputVal = 0;
543 SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_ON, outputVal,
544 currentTiming->vblank_start);
545 SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_OFF, outputVal,
546 currentTiming->vblank_end);
547 DBE_SETREG(vt_vblank, outputVal);
548 outputVal = 0;
549 SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_ON, outputVal,
550 currentTiming->hblank_start);
551 SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_OFF, outputVal,
552 currentTiming->hblank_end - 3);
553 DBE_SETREG(vt_hblank, outputVal);
554 outputVal = 0;
555 SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_ON, outputVal,
556 currentTiming->vblank_start);
557 SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_OFF, outputVal,
558 currentTiming->vblank_end);
559 DBE_SETREG(vt_vcmap, outputVal);
560 outputVal = 0;
561 SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_ON, outputVal,
562 currentTiming->hblank_start);
563 SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_OFF, outputVal,
564 currentTiming->hblank_end - 3);
565 DBE_SETREG(vt_hcmap, outputVal);
566
567 if (flatpanel_id != -1)
568 sgivwfb_setup_flatpanel(par, currentTiming);
569
570 outputVal = 0;
571 temp = currentTiming->vblank_start - currentTiming->vblank_end - 1;
572 if (temp > 0)
573 temp = -temp;
574
575 SET_DBE_FIELD(DID_START_XY, DID_STARTY, outputVal, (u32) temp);
576 if (currentTiming->hblank_end >= 20)
577 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
578 currentTiming->hblank_end - 20);
579 else
580 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
581 currentTiming->htotal - (20 -
582 currentTiming->
583 hblank_end));
584 DBE_SETREG(did_start_xy, outputVal);
585
586 outputVal = 0;
587 SET_DBE_FIELD(CRS_START_XY, CRS_STARTY, outputVal,
588 (u32) (temp + 1));
589 if (currentTiming->hblank_end >= DBE_CRS_MAGIC)
590 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
591 currentTiming->hblank_end - DBE_CRS_MAGIC);
592 else
593 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
594 currentTiming->htotal - (DBE_CRS_MAGIC -
595 currentTiming->
596 hblank_end));
597 DBE_SETREG(crs_start_xy, outputVal);
598
599 outputVal = 0;
600 SET_DBE_FIELD(VC_START_XY, VC_STARTY, outputVal, (u32) temp);
601 SET_DBE_FIELD(VC_START_XY, VC_STARTX, outputVal,
602 currentTiming->hblank_end - 4);
603 DBE_SETREG(vc_start_xy, outputVal);
604
605 DBE_SETREG(frm_size_tile, frmWrite1);
606 DBE_SETREG(frm_size_pixel, frmWrite2);
607
608 outputVal = 0;
609 SET_DBE_FIELD(DOTCLK, M, outputVal, currentTiming->pll_m - 1);
610 SET_DBE_FIELD(DOTCLK, N, outputVal, currentTiming->pll_n - 1);
611 SET_DBE_FIELD(DOTCLK, P, outputVal, currentTiming->pll_p);
612 SET_DBE_FIELD(DOTCLK, RUN, outputVal, 1);
613 DBE_SETREG(dotclock, outputVal);
614
615 udelay(11 * 1000);
616
617 DBE_SETREG(vt_vpixen, 0xffffff);
618 DBE_SETREG(vt_hpixen, 0xffffff);
619
620 outputVal = 0;
621 SET_DBE_FIELD(VT_XYMAX, VT_MAXX, outputVal, currentTiming->htotal);
622 SET_DBE_FIELD(VT_XYMAX, VT_MAXY, outputVal, currentTiming->vtotal);
623 DBE_SETREG(vt_xymax, outputVal);
624
625 outputVal = frmWrite1;
626 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, outputVal, 1);
627 DBE_SETREG(frm_size_tile, outputVal);
628 DBE_SETREG(frm_size_tile, frmWrite1);
629
630 outputVal = 0;
631 SET_DBE_FIELD(OVR_WIDTH_TILE, OVR_FIFO_RESET, outputVal, 1);
632 DBE_SETREG(ovr_width_tile, outputVal);
633 DBE_SETREG(ovr_width_tile, 0);
634
635 DBE_SETREG(frm_control, frmWrite3b);
636 DBE_SETREG(did_control, 0);
637
638 // Wait for dbe to take frame settings
639 for (i = 0; i < 100000; i++) {
640 DBE_GETREG(frm_inhwctrl, readVal);
641 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) !=
642 0)
643 break;
644 else
645 udelay(1);
646 }
647
648 if (i == 100000)
649 printk(KERN_INFO
650 "sgivwfb: timeout waiting for frame DMA enable.\n");
651
652 outputVal = 0;
653 htmp = currentTiming->hblank_end - 19;
654 if (htmp < 0)
655 htmp += currentTiming->htotal; /* allow blank to wrap around */
656 SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_ON, outputVal, htmp);
657 SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_OFF, outputVal,
658 ((htmp + currentTiming->width -
659 2) % currentTiming->htotal));
660 DBE_SETREG(vt_hpixen, outputVal);
661
662 outputVal = 0;
663 SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_OFF, outputVal,
664 currentTiming->vblank_start);
665 SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_ON, outputVal,
666 currentTiming->vblank_end);
667 DBE_SETREG(vt_vpixen, outputVal);
668
669 // Turn off mouse cursor
670 par->regs->crs_ctl = 0;
671
672 // XXX What's this section for??
673 DBE_GETREG(ctrlstat, readVal);
674 readVal &= 0x02000000;
675
676 if (readVal != 0) {
677 DBE_SETREG(ctrlstat, 0x30000000);
678 }
679 return 0;
680 }
681
682 /*
683 * Set a single color register. The values supplied are already
684 * rounded down to the hardware's capabilities (according to the
685 * entries in the var structure). Return != 0 for invalid regno.
686 */
687
688 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
689 u_int blue, u_int transp,
690 struct fb_info *info)
691 {
692 struct sgivw_par *par = (struct sgivw_par *) info->par;
693
694 if (regno > 255)
695 return 1;
696 red >>= 8;
697 green >>= 8;
698 blue >>= 8;
699
700 /* wait for the color map FIFO to have a free entry */
701 while (par->cmap_fifo == 0)
702 par->cmap_fifo = par->regs->cm_fifo;
703
704 par->regs->cmap[regno] = (red << 24) | (green << 16) | (blue << 8);
705 par->cmap_fifo--; /* assume FIFO is filling up */
706 return 0;
707 }
708
709 static int sgivwfb_mmap(struct fb_info *info,
710 struct vm_area_struct *vma)
711 {
712 unsigned long size = vma->vm_end - vma->vm_start;
713 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
714
715 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
716 return -EINVAL;
717 if (offset + size > sgivwfb_mem_size)
718 return -EINVAL;
719 offset += sgivwfb_mem_phys;
720 pgprot_val(vma->vm_page_prot) =
721 pgprot_val(vma->vm_page_prot) | _PAGE_PCD;
722 vma->vm_flags |= VM_IO;
723 if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
724 size, vma->vm_page_prot))
725 return -EAGAIN;
726 printk(KERN_DEBUG "sgivwfb: mmap framebuffer P(%lx)->V(%lx)\n",
727 offset, vma->vm_start);
728 return 0;
729 }
730
731 int __init sgivwfb_setup(char *options)
732 {
733 char *this_opt;
734
735 if (!options || !*options)
736 return 0;
737
738 while ((this_opt = strsep(&options, ",")) != NULL) {
739 if (!strncmp(this_opt, "monitor:", 8)) {
740 if (!strncmp(this_opt + 8, "crt", 3))
741 flatpanel_id = -1;
742 else if (!strncmp(this_opt + 8, "1600sw", 6))
743 flatpanel_id = FLATPANEL_SGI_1600SW;
744 }
745 }
746 return 0;
747 }
748
749 /*
750 * Initialisation
751 */
752 static int __init sgivwfb_probe(struct platform_device *dev)
753 {
754 struct sgivw_par *par;
755 struct fb_info *info;
756 char *monitor;
757
758 info = framebuffer_alloc(sizeof(struct sgivw_par) + sizeof(u32) * 256, &dev->dev);
759 if (!info)
760 return -ENOMEM;
761 par = info->par;
762
763 if (!request_mem_region(DBE_REG_PHYS, DBE_REG_SIZE, "sgivwfb")) {
764 printk(KERN_ERR "sgivwfb: couldn't reserve mmio region\n");
765 framebuffer_release(info);
766 return -EBUSY;
767 }
768
769 par->regs = (struct asregs *) ioremap_nocache(DBE_REG_PHYS, DBE_REG_SIZE);
770 if (!par->regs) {
771 printk(KERN_ERR "sgivwfb: couldn't ioremap registers\n");
772 goto fail_ioremap_regs;
773 }
774
775 mtrr_add(sgivwfb_mem_phys, sgivwfb_mem_size, MTRR_TYPE_WRCOMB, 1);
776
777 sgivwfb_fix.smem_start = sgivwfb_mem_phys;
778 sgivwfb_fix.smem_len = sgivwfb_mem_size;
779 sgivwfb_fix.ywrapstep = ywrap;
780 sgivwfb_fix.ypanstep = ypan;
781
782 info->fix = sgivwfb_fix;
783
784 switch (flatpanel_id) {
785 case FLATPANEL_SGI_1600SW:
786 info->var = sgivwfb_var1600sw;
787 monitor = "SGI 1600SW flatpanel";
788 break;
789 default:
790 info->var = sgivwfb_var;
791 monitor = "CRT";
792 }
793
794 printk(KERN_INFO "sgivwfb: %s monitor selected\n", monitor);
795
796 info->fbops = &sgivwfb_ops;
797 info->pseudo_palette = (void *) (par + 1);
798 info->flags = FBINFO_DEFAULT;
799
800 info->screen_base = ioremap_nocache((unsigned long) sgivwfb_mem_phys, sgivwfb_mem_size);
801 if (!info->screen_base) {
802 printk(KERN_ERR "sgivwfb: couldn't ioremap screen_base\n");
803 goto fail_ioremap_fbmem;
804 }
805
806 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
807 goto fail_color_map;
808
809 if (register_framebuffer(info) < 0) {
810 printk(KERN_ERR "sgivwfb: couldn't register framebuffer\n");
811 goto fail_register_framebuffer;
812 }
813
814 platform_set_drvdata(dev, info);
815
816 printk(KERN_INFO "fb%d: SGI DBE frame buffer device, using %ldK of video memory at %#lx\n",
817 info->node, sgivwfb_mem_size >> 10, sgivwfb_mem_phys);
818 return 0;
819
820 fail_register_framebuffer:
821 fb_dealloc_cmap(&info->cmap);
822 fail_color_map:
823 iounmap((char *) info->screen_base);
824 fail_ioremap_fbmem:
825 iounmap(par->regs);
826 fail_ioremap_regs:
827 release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
828 framebuffer_release(info);
829 return -ENXIO;
830 }
831
832 static int sgivwfb_remove(struct platform_device *dev)
833 {
834 struct fb_info *info = platform_get_drvdata(dev);
835
836 if (info) {
837 struct sgivw_par *par = info->par;
838
839 unregister_framebuffer(info);
840 dbe_TurnOffDma(par);
841 iounmap(par->regs);
842 iounmap(info->screen_base);
843 release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
844 }
845 return 0;
846 }
847
848 static struct platform_driver sgivwfb_driver = {
849 .probe = sgivwfb_probe,
850 .remove = sgivwfb_remove,
851 .driver = {
852 .name = "sgivwfb",
853 },
854 };
855
856 static struct platform_device *sgivwfb_device;
857
858 int __init sgivwfb_init(void)
859 {
860 int ret;
861
862 #ifndef MODULE
863 char *option = NULL;
864
865 if (fb_get_options("sgivwfb", &option))
866 return -ENODEV;
867 sgivwfb_setup(option);
868 #endif
869 ret = platform_driver_register(&sgivwfb_driver);
870 if (!ret) {
871 sgivwfb_device = platform_device_alloc("sgivwfb", 0);
872 if (sgivwfb_device) {
873 ret = platform_device_add(sgivwfb_device);
874 } else
875 ret = -ENOMEM;
876 if (ret) {
877 platform_driver_unregister(&sgivwfb_driver);
878 platform_device_put(sgivwfb_device);
879 }
880 }
881 return ret;
882 }
883
884 module_init(sgivwfb_init);
885
886 #ifdef MODULE
887 MODULE_LICENSE("GPL");
888
889 static void __exit sgivwfb_exit(void)
890 {
891 platform_device_unregister(sgivwfb_device);
892 platform_driver_unregister(&sgivwfb_driver);
893 }
894
895 module_exit(sgivwfb_exit);
896
897 #endif /* MODULE */
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