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[PATCH] g_file_storage: fix obscure race condition
[linux/fpc-iii.git] / drivers / video / sgivwfb.c
blob8413907b379a147c1ac112604d7f897ed64a43ce
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 <asm/io.h>
22 #include <asm/mtrr.h>
23
24 #define INCLUDE_TIMING_TABLE_DATA
25 #define DBE_REG_BASE par->regs
26 #include <video/sgivw.h>
27
28 struct sgivw_par {
29 struct asregs *regs;
30 u32 cmap_fifo;
31 u_long timing_num;
32 };
33
34 #define FLATPANEL_SGI_1600SW 5
35
36 /*
37 * RAM we reserve for the frame buffer. This defines the maximum screen
38 * size
39 *
40 * The default can be overridden if the driver is compiled as a module
41 */
42
43 /* set by arch/i386/kernel/setup.c */
44 extern unsigned long sgivwfb_mem_phys;
45 extern unsigned long sgivwfb_mem_size;
46
47 static int ypan = 0;
48 static int ywrap = 0;
49
50 static int flatpanel_id = -1;
51
52 static struct fb_fix_screeninfo sgivwfb_fix __initdata = {
53 .id = "SGI Vis WS FB",
54 .type = FB_TYPE_PACKED_PIXELS,
55 .visual = FB_VISUAL_PSEUDOCOLOR,
56 .mmio_start = DBE_REG_PHYS,
57 .mmio_len = DBE_REG_SIZE,
58 .accel = FB_ACCEL_NONE,
59 .line_length = 640,
60 };
61
62 static struct fb_var_screeninfo sgivwfb_var __initdata = {
63 /* 640x480, 8 bpp */
64 .xres = 640,
65 .yres = 480,
66 .xres_virtual = 640,
67 .yres_virtual = 480,
68 .bits_per_pixel = 8,
69 .red = { 0, 8, 0 },
70 .green = { 0, 8, 0 },
71 .blue = { 0, 8, 0 },
72 .height = -1,
73 .width = -1,
74 .pixclock = 20000,
75 .left_margin = 64,
76 .right_margin = 64,
77 .upper_margin = 32,
78 .lower_margin = 32,
79 .hsync_len = 64,
80 .vsync_len = 2,
81 .vmode = FB_VMODE_NONINTERLACED
82 };
83
84 static struct fb_var_screeninfo sgivwfb_var1600sw __initdata = {
85 /* 1600x1024, 8 bpp */
86 .xres = 1600,
87 .yres = 1024,
88 .xres_virtual = 1600,
89 .yres_virtual = 1024,
90 .bits_per_pixel = 8,
91 .red = { 0, 8, 0 },
92 .green = { 0, 8, 0 },
93 .blue = { 0, 8, 0 },
94 .height = -1,
95 .width = -1,
96 .pixclock = 9353,
97 .left_margin = 20,
98 .right_margin = 30,
99 .upper_margin = 37,
100 .lower_margin = 3,
101 .hsync_len = 20,
102 .vsync_len = 3,
103 .vmode = FB_VMODE_NONINTERLACED
104 };
105
106 /*
107 * Interface used by the world
108 */
109 int sgivwfb_init(void);
110
111 static int sgivwfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
112 static int sgivwfb_set_par(struct fb_info *info);
113 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
114 u_int blue, u_int transp,
115 struct fb_info *info);
116 static int sgivwfb_mmap(struct fb_info *info, struct file *file,
117 struct vm_area_struct *vma);
118
119 static struct fb_ops sgivwfb_ops = {
120 .owner = THIS_MODULE,
121 .fb_check_var = sgivwfb_check_var,
122 .fb_set_par = sgivwfb_set_par,
123 .fb_setcolreg = sgivwfb_setcolreg,
124 .fb_fillrect = cfb_fillrect,
125 .fb_copyarea = cfb_copyarea,
126 .fb_imageblit = cfb_imageblit,
127 .fb_cursor = soft_cursor,
128 .fb_mmap = sgivwfb_mmap,
129 };
130
131 /*
132 * Internal routines
133 */
134 static unsigned long bytes_per_pixel(int bpp)
135 {
136 switch (bpp) {
137 case 8:
138 return 1;
139 case 16:
140 return 2;
141 case 32:
142 return 4;
143 default:
144 printk(KERN_INFO "sgivwfb: unsupported bpp %d\n", bpp);
145 return 0;
146 }
147 }
148
149 static unsigned long get_line_length(int xres_virtual, int bpp)
150 {
151 return (xres_virtual * bytes_per_pixel(bpp));
152 }
153
154 /*
155 * Function: dbe_TurnOffDma
156 * Parameters: (None)
157 * Description: This should turn off the monitor and dbe. This is used
158 * when switching between the serial console and the graphics
159 * console.
160 */
161
162 static void dbe_TurnOffDma(struct sgivw_par *par)
163 {
164 unsigned int readVal;
165 int i;
166
167 // Check to see if things are already turned off:
168 // 1) Check to see if dbe is not using the internal dotclock.
169 // 2) Check to see if the xy counter in dbe is already off.
170
171 DBE_GETREG(ctrlstat, readVal);
172 if (GET_DBE_FIELD(CTRLSTAT, PCLKSEL, readVal) < 2)
173 return;
174
175 DBE_GETREG(vt_xy, readVal);
176 if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1)
177 return;
178
179 // Otherwise, turn off dbe
180
181 DBE_GETREG(ovr_control, readVal);
182 SET_DBE_FIELD(OVR_CONTROL, OVR_DMA_ENABLE, readVal, 0);
183 DBE_SETREG(ovr_control, readVal);
184 udelay(1000);
185 DBE_GETREG(frm_control, readVal);
186 SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, readVal, 0);
187 DBE_SETREG(frm_control, readVal);
188 udelay(1000);
189 DBE_GETREG(did_control, readVal);
190 SET_DBE_FIELD(DID_CONTROL, DID_DMA_ENABLE, readVal, 0);
191 DBE_SETREG(did_control, readVal);
192 udelay(1000);
193
194 // XXX HACK:
195 //
196 // This was necessary for GBE--we had to wait through two
197 // vertical retrace periods before the pixel DMA was
198 // turned off for sure. I've left this in for now, in
199 // case dbe needs it.
200
201 for (i = 0; i < 10000; i++) {
202 DBE_GETREG(frm_inhwctrl, readVal);
203 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) ==
204 0)
205 udelay(10);
206 else {
207 DBE_GETREG(ovr_inhwctrl, readVal);
208 if (GET_DBE_FIELD
209 (OVR_INHWCTRL, OVR_DMA_ENABLE, readVal) == 0)
210 udelay(10);
211 else {
212 DBE_GETREG(did_inhwctrl, readVal);
213 if (GET_DBE_FIELD
214 (DID_INHWCTRL, DID_DMA_ENABLE,
215 readVal) == 0)
216 udelay(10);
217 else
218 break;
219 }
220 }
221 }
222 }
223
224 /*
225 * Set the User Defined Part of the Display. Again if par use it to get
226 * real video mode.
227 */
228 static int sgivwfb_check_var(struct fb_var_screeninfo *var,
229 struct fb_info *info)
230 {
231 struct sgivw_par *par = (struct sgivw_par *)info->par;
232 struct dbe_timing_info *timing;
233 u_long line_length;
234 u_long min_mode;
235 int req_dot;
236 int test_mode;
237
238 /*
239 * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
240 * as FB_VMODE_SMOOTH_XPAN is only used internally
241 */
242
243 if (var->vmode & FB_VMODE_CONUPDATE) {
244 var->vmode |= FB_VMODE_YWRAP;
245 var->xoffset = info->var.xoffset;
246 var->yoffset = info->var.yoffset;
247 }
248
249 /* XXX FIXME - forcing var's */
250 var->xoffset = 0;
251 var->yoffset = 0;
252
253 /* Limit bpp to 8, 16, and 32 */
254 if (var->bits_per_pixel <= 8)
255 var->bits_per_pixel = 8;
256 else if (var->bits_per_pixel <= 16)
257 var->bits_per_pixel = 16;
258 else if (var->bits_per_pixel <= 32)
259 var->bits_per_pixel = 32;
260 else
261 return -EINVAL;
262
263 var->grayscale = 0; /* No grayscale for now */
264
265 /* determine valid resolution and timing */
266 for (min_mode = 0; min_mode < DBE_VT_SIZE; min_mode++) {
267 if (dbeVTimings[min_mode].width >= var->xres &&
268 dbeVTimings[min_mode].height >= var->yres)
269 break;
270 }
271
272 if (min_mode == DBE_VT_SIZE)
273 return -EINVAL; /* Resolution to high */
274
275 /* XXX FIXME - should try to pick best refresh rate */
276 /* for now, pick closest dot-clock within 3MHz */
277 req_dot = PICOS2KHZ(var->pixclock);
278 printk(KERN_INFO "sgivwfb: requested pixclock=%d ps (%d KHz)\n",
279 var->pixclock, req_dot);
280 test_mode = min_mode;
281 while (dbeVTimings[min_mode].width == dbeVTimings[test_mode].width) {
282 if (dbeVTimings[test_mode].cfreq + 3000 > req_dot)
283 break;
284 test_mode++;
285 }
286 if (dbeVTimings[min_mode].width != dbeVTimings[test_mode].width)
287 test_mode--;
288 min_mode = test_mode;
289 timing = &dbeVTimings[min_mode];
290 printk(KERN_INFO "sgivwfb: granted dot-clock=%d KHz\n", timing->cfreq);
291
292 /* Adjust virtual resolution, if necessary */
293 if (var->xres > var->xres_virtual || (!ywrap && !ypan))
294 var->xres_virtual = var->xres;
295 if (var->yres > var->yres_virtual || (!ywrap && !ypan))
296 var->yres_virtual = var->yres;
297
298 /*
299 * Memory limit
300 */
301 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
302 if (line_length * var->yres_virtual > sgivwfb_mem_size)
303 return -ENOMEM; /* Virtual resolution to high */
304
305 info->fix.line_length = line_length;
306
307 switch (var->bits_per_pixel) {
308 case 8:
309 var->red.offset = 0;
310 var->red.length = 8;
311 var->green.offset = 0;
312 var->green.length = 8;
313 var->blue.offset = 0;
314 var->blue.length = 8;
315 var->transp.offset = 0;
316 var->transp.length = 0;
317 break;
318 case 16: /* RGBA 5551 */
319 var->red.offset = 11;
320 var->red.length = 5;
321 var->green.offset = 6;
322 var->green.length = 5;
323 var->blue.offset = 1;
324 var->blue.length = 5;
325 var->transp.offset = 0;
326 var->transp.length = 0;
327 break;
328 case 32: /* RGB 8888 */
329 var->red.offset = 0;
330 var->red.length = 8;
331 var->green.offset = 8;
332 var->green.length = 8;
333 var->blue.offset = 16;
334 var->blue.length = 8;
335 var->transp.offset = 24;
336 var->transp.length = 8;
337 break;
338 }
339 var->red.msb_right = 0;
340 var->green.msb_right = 0;
341 var->blue.msb_right = 0;
342 var->transp.msb_right = 0;
343
344 /* set video timing information */
345 var->pixclock = KHZ2PICOS(timing->cfreq);
346 var->left_margin = timing->htotal - timing->hsync_end;
347 var->right_margin = timing->hsync_start - timing->width;
348 var->upper_margin = timing->vtotal - timing->vsync_end;
349 var->lower_margin = timing->vsync_start - timing->height;
350 var->hsync_len = timing->hsync_end - timing->hsync_start;
351 var->vsync_len = timing->vsync_end - timing->vsync_start;
352
353 /* Ouch. This breaks the rules but timing_num is only important if you
354 * change a video mode */
355 par->timing_num = min_mode;
356
357 printk(KERN_INFO "sgivwfb: new video mode xres=%d yres=%d bpp=%d\n",
358 var->xres, var->yres, var->bits_per_pixel);
359 printk(KERN_INFO " vxres=%d vyres=%d\n", var->xres_virtual,
360 var->yres_virtual);
361 return 0;
362 }
363
364 /*
365 * Setup flatpanel related registers.
366 */
367 static void sgivwfb_setup_flatpanel(struct sgivw_par *par, struct dbe_timing_info *currentTiming)
368 {
369 int fp_wid, fp_hgt, fp_vbs, fp_vbe;
370 u32 outputVal = 0;
371
372 SET_DBE_FIELD(VT_FLAGS, HDRV_INVERT, outputVal,
373 (currentTiming->flags & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1);
374 SET_DBE_FIELD(VT_FLAGS, VDRV_INVERT, outputVal,
375 (currentTiming->flags & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1);
376 DBE_SETREG(vt_flags, outputVal);
377
378 /* Turn on the flat panel */
379 switch (flatpanel_id) {
380 case FLATPANEL_SGI_1600SW:
381 fp_wid = 1600;
382 fp_hgt = 1024;
383 fp_vbs = 0;
384 fp_vbe = 1600;
385 currentTiming->pll_m = 4;
386 currentTiming->pll_n = 1;
387 currentTiming->pll_p = 0;
388 break;
389 default:
390 fp_wid = fp_hgt = fp_vbs = fp_vbe = 0xfff;
391 }
392
393 outputVal = 0;
394 SET_DBE_FIELD(FP_DE, FP_DE_ON, outputVal, fp_vbs);
395 SET_DBE_FIELD(FP_DE, FP_DE_OFF, outputVal, fp_vbe);
396 DBE_SETREG(fp_de, outputVal);
397 outputVal = 0;
398 SET_DBE_FIELD(FP_HDRV, FP_HDRV_OFF, outputVal, fp_wid);
399 DBE_SETREG(fp_hdrv, outputVal);
400 outputVal = 0;
401 SET_DBE_FIELD(FP_VDRV, FP_VDRV_ON, outputVal, 1);
402 SET_DBE_FIELD(FP_VDRV, FP_VDRV_OFF, outputVal, fp_hgt + 1);
403 DBE_SETREG(fp_vdrv, outputVal);
404 }
405
406 /*
407 * Set the hardware according to 'par'.
408 */
409 static int sgivwfb_set_par(struct fb_info *info)
410 {
411 struct sgivw_par *par = info->par;
412 int i, j, htmp, temp;
413 u32 readVal, outputVal;
414 int wholeTilesX, maxPixelsPerTileX;
415 int frmWrite1, frmWrite2, frmWrite3b;
416 struct dbe_timing_info *currentTiming; /* Current Video Timing */
417 int xpmax, ypmax; // Monitor resolution
418 int bytesPerPixel; // Bytes per pixel
419
420 currentTiming = &dbeVTimings[par->timing_num];
421 bytesPerPixel = bytes_per_pixel(info->var.bits_per_pixel);
422 xpmax = currentTiming->width;
423 ypmax = currentTiming->height;
424
425 /* dbe_InitGraphicsBase(); */
426 /* Turn on dotclock PLL */
427 DBE_SETREG(ctrlstat, 0x20000000);
428
429 dbe_TurnOffDma(par);
430
431 /* dbe_CalculateScreenParams(); */
432 maxPixelsPerTileX = 512 / bytesPerPixel;
433 wholeTilesX = xpmax / maxPixelsPerTileX;
434 if (wholeTilesX * maxPixelsPerTileX < xpmax)
435 wholeTilesX++;
436
437 printk(KERN_DEBUG "sgivwfb: pixPerTile=%d wholeTilesX=%d\n",
438 maxPixelsPerTileX, wholeTilesX);
439
440 /* dbe_InitGammaMap(); */
441 udelay(10);
442
443 for (i = 0; i < 256; i++) {
444 DBE_ISETREG(gmap, i, (i << 24) | (i << 16) | (i << 8));
445 }
446
447 /* dbe_TurnOn(); */
448 DBE_GETREG(vt_xy, readVal);
449 if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1) {
450 DBE_SETREG(vt_xy, 0x00000000);
451 udelay(1);
452 } else
453 dbe_TurnOffDma(par);
454
455 /* dbe_Initdbe(); */
456 for (i = 0; i < 256; i++) {
457 for (j = 0; j < 100; j++) {
458 DBE_GETREG(cm_fifo, readVal);
459 if (readVal != 0x00000000)
460 break;
461 else
462 udelay(10);
463 }
464
465 // DBE_ISETREG(cmap, i, 0x00000000);
466 DBE_ISETREG(cmap, i, (i << 8) | (i << 16) | (i << 24));
467 }
468
469 /* dbe_InitFramebuffer(); */
470 frmWrite1 = 0;
471 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_WIDTH_TILE, frmWrite1,
472 wholeTilesX);
473 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_RHS, frmWrite1, 0);
474
475 switch (bytesPerPixel) {
476 case 1:
477 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
478 DBE_FRM_DEPTH_8);
479 break;
480 case 2:
481 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
482 DBE_FRM_DEPTH_16);
483 break;
484 case 4:
485 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
486 DBE_FRM_DEPTH_32);
487 break;
488 }
489
490 frmWrite2 = 0;
491 SET_DBE_FIELD(FRM_SIZE_PIXEL, FB_HEIGHT_PIX, frmWrite2, ypmax);
492
493 // Tell dbe about the framebuffer location and type
494 // XXX What format is the FRM_TILE_PTR?? 64K aligned address?
495 frmWrite3b = 0;
496 SET_DBE_FIELD(FRM_CONTROL, FRM_TILE_PTR, frmWrite3b,
497 sgivwfb_mem_phys >> 9);
498 SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, frmWrite3b, 1);
499 SET_DBE_FIELD(FRM_CONTROL, FRM_LINEAR, frmWrite3b, 1);
500
501 /* Initialize DIDs */
502
503 outputVal = 0;
504 switch (bytesPerPixel) {
505 case 1:
506 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_I8);
507 break;
508 case 2:
509 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGBA5);
510 break;
511 case 4:
512 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGB8);
513 break;
514 }
515 SET_DBE_FIELD(WID, BUF, outputVal, DBE_BMODE_BOTH);
516
517 for (i = 0; i < 32; i++) {
518 DBE_ISETREG(mode_regs, i, outputVal);
519 }
520
521 /* dbe_InitTiming(); */
522 DBE_SETREG(vt_intr01, 0xffffffff);
523 DBE_SETREG(vt_intr23, 0xffffffff);
524
525 DBE_GETREG(dotclock, readVal);
526 DBE_SETREG(dotclock, readVal & 0xffff);
527
528 DBE_SETREG(vt_xymax, 0x00000000);
529 outputVal = 0;
530 SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_ON, outputVal,
531 currentTiming->vsync_start);
532 SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_OFF, outputVal,
533 currentTiming->vsync_end);
534 DBE_SETREG(vt_vsync, outputVal);
535 outputVal = 0;
536 SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_ON, outputVal,
537 currentTiming->hsync_start);
538 SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_OFF, outputVal,
539 currentTiming->hsync_end);
540 DBE_SETREG(vt_hsync, outputVal);
541 outputVal = 0;
542 SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_ON, outputVal,
543 currentTiming->vblank_start);
544 SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_OFF, outputVal,
545 currentTiming->vblank_end);
546 DBE_SETREG(vt_vblank, outputVal);
547 outputVal = 0;
548 SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_ON, outputVal,
549 currentTiming->hblank_start);
550 SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_OFF, outputVal,
551 currentTiming->hblank_end - 3);
552 DBE_SETREG(vt_hblank, outputVal);
553 outputVal = 0;
554 SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_ON, outputVal,
555 currentTiming->vblank_start);
556 SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_OFF, outputVal,
557 currentTiming->vblank_end);
558 DBE_SETREG(vt_vcmap, outputVal);
559 outputVal = 0;
560 SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_ON, outputVal,
561 currentTiming->hblank_start);
562 SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_OFF, outputVal,
563 currentTiming->hblank_end - 3);
564 DBE_SETREG(vt_hcmap, outputVal);
565
566 if (flatpanel_id != -1)
567 sgivwfb_setup_flatpanel(par, currentTiming);
568
569 outputVal = 0;
570 temp = currentTiming->vblank_start - currentTiming->vblank_end - 1;
571 if (temp > 0)
572 temp = -temp;
573
574 SET_DBE_FIELD(DID_START_XY, DID_STARTY, outputVal, (u32) temp);
575 if (currentTiming->hblank_end >= 20)
576 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
577 currentTiming->hblank_end - 20);
578 else
579 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
580 currentTiming->htotal - (20 -
581 currentTiming->
582 hblank_end));
583 DBE_SETREG(did_start_xy, outputVal);
584
585 outputVal = 0;
586 SET_DBE_FIELD(CRS_START_XY, CRS_STARTY, outputVal,
587 (u32) (temp + 1));
588 if (currentTiming->hblank_end >= DBE_CRS_MAGIC)
589 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
590 currentTiming->hblank_end - DBE_CRS_MAGIC);
591 else
592 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
593 currentTiming->htotal - (DBE_CRS_MAGIC -
594 currentTiming->
595 hblank_end));
596 DBE_SETREG(crs_start_xy, outputVal);
597
598 outputVal = 0;
599 SET_DBE_FIELD(VC_START_XY, VC_STARTY, outputVal, (u32) temp);
600 SET_DBE_FIELD(VC_START_XY, VC_STARTX, outputVal,
601 currentTiming->hblank_end - 4);
602 DBE_SETREG(vc_start_xy, outputVal);
603
604 DBE_SETREG(frm_size_tile, frmWrite1);
605 DBE_SETREG(frm_size_pixel, frmWrite2);
606
607 outputVal = 0;
608 SET_DBE_FIELD(DOTCLK, M, outputVal, currentTiming->pll_m - 1);
609 SET_DBE_FIELD(DOTCLK, N, outputVal, currentTiming->pll_n - 1);
610 SET_DBE_FIELD(DOTCLK, P, outputVal, currentTiming->pll_p);
611 SET_DBE_FIELD(DOTCLK, RUN, outputVal, 1);
612 DBE_SETREG(dotclock, outputVal);
613
614 udelay(11 * 1000);
615
616 DBE_SETREG(vt_vpixen, 0xffffff);
617 DBE_SETREG(vt_hpixen, 0xffffff);
618
619 outputVal = 0;
620 SET_DBE_FIELD(VT_XYMAX, VT_MAXX, outputVal, currentTiming->htotal);
621 SET_DBE_FIELD(VT_XYMAX, VT_MAXY, outputVal, currentTiming->vtotal);
622 DBE_SETREG(vt_xymax, outputVal);
623
624 outputVal = frmWrite1;
625 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, outputVal, 1);
626 DBE_SETREG(frm_size_tile, outputVal);
627 DBE_SETREG(frm_size_tile, frmWrite1);
628
629 outputVal = 0;
630 SET_DBE_FIELD(OVR_WIDTH_TILE, OVR_FIFO_RESET, outputVal, 1);
631 DBE_SETREG(ovr_width_tile, outputVal);
632 DBE_SETREG(ovr_width_tile, 0);
633
634 DBE_SETREG(frm_control, frmWrite3b);
635 DBE_SETREG(did_control, 0);
636
637 // Wait for dbe to take frame settings
638 for (i = 0; i < 100000; i++) {
639 DBE_GETREG(frm_inhwctrl, readVal);
640 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) !=
641 0)
642 break;
643 else
644 udelay(1);
645 }
646
647 if (i == 100000)
648 printk(KERN_INFO
649 "sgivwfb: timeout waiting for frame DMA enable.\n");
650
651 outputVal = 0;
652 htmp = currentTiming->hblank_end - 19;
653 if (htmp < 0)
654 htmp += currentTiming->htotal; /* allow blank to wrap around */
655 SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_ON, outputVal, htmp);
656 SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_OFF, outputVal,
657 ((htmp + currentTiming->width -
658 2) % currentTiming->htotal));
659 DBE_SETREG(vt_hpixen, outputVal);
660
661 outputVal = 0;
662 SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_OFF, outputVal,
663 currentTiming->vblank_start);
664 SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_ON, outputVal,
665 currentTiming->vblank_end);
666 DBE_SETREG(vt_vpixen, outputVal);
667
668 // Turn off mouse cursor
669 par->regs->crs_ctl = 0;
670
671 // XXX What's this section for??
672 DBE_GETREG(ctrlstat, readVal);
673 readVal &= 0x02000000;
674
675 if (readVal != 0) {
676 DBE_SETREG(ctrlstat, 0x30000000);
677 }
678 return 0;
679 }
680
681 /*
682 * Set a single color register. The values supplied are already
683 * rounded down to the hardware's capabilities (according to the
684 * entries in the var structure). Return != 0 for invalid regno.
685 */
686
687 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
688 u_int blue, u_int transp,
689 struct fb_info *info)
690 {
691 struct sgivw_par *par = (struct sgivw_par *) info->par;
692
693 if (regno > 255)
694 return 1;
695 red >>= 8;
696 green >>= 8;
697 blue >>= 8;
698
699 /* wait for the color map FIFO to have a free entry */
700 while (par->cmap_fifo == 0)
701 par->cmap_fifo = par->regs->cm_fifo;
702
703 par->regs->cmap[regno] = (red << 24) | (green << 16) | (blue << 8);
704 par->cmap_fifo--; /* assume FIFO is filling up */
705 return 0;
706 }
707
708 static int sgivwfb_mmap(struct fb_info *info, struct file *file,
709 struct vm_area_struct *vma)
710 {
711 unsigned long size = vma->vm_end - vma->vm_start;
712 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
713
714 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
715 return -EINVAL;
716 if (offset + size > sgivwfb_mem_size)
717 return -EINVAL;
718 offset += sgivwfb_mem_phys;
719 pgprot_val(vma->vm_page_prot) =
720 pgprot_val(vma->vm_page_prot) | _PAGE_PCD;
721 vma->vm_flags |= VM_IO;
722 if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
723 size, vma->vm_page_prot))
724 return -EAGAIN;
725 vma->vm_file = file;
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 void sgivwfb_release(struct device *device)
753 {
754 }
755
756 static int __init sgivwfb_probe(struct device *device)
757 {
758 struct platform_device *dev = to_platform_device(device);
759 struct sgivw_par *par;
760 struct fb_info *info;
761 char *monitor;
762
763 info = framebuffer_alloc(sizeof(struct sgivw_par) + sizeof(u32) * 256, &dev->dev);
764 if (!info)
765 return -ENOMEM;
766 par = info->par;
767
768 if (!request_mem_region(DBE_REG_PHYS, DBE_REG_SIZE, "sgivwfb")) {
769 printk(KERN_ERR "sgivwfb: couldn't reserve mmio region\n");
770 framebuffer_release(info);
771 return -EBUSY;
772 }
773
774 par->regs = (struct asregs *) ioremap_nocache(DBE_REG_PHYS, DBE_REG_SIZE);
775 if (!par->regs) {
776 printk(KERN_ERR "sgivwfb: couldn't ioremap registers\n");
777 goto fail_ioremap_regs;
778 }
779
780 mtrr_add(sgivwfb_mem_phys, sgivwfb_mem_size, MTRR_TYPE_WRCOMB, 1);
781
782 sgivwfb_fix.smem_start = sgivwfb_mem_phys;
783 sgivwfb_fix.smem_len = sgivwfb_mem_size;
784 sgivwfb_fix.ywrapstep = ywrap;
785 sgivwfb_fix.ypanstep = ypan;
786
787 info->fix = sgivwfb_fix;
788
789 switch (flatpanel_id) {
790 case FLATPANEL_SGI_1600SW:
791 info->var = sgivwfb_var1600sw;
792 monitor = "SGI 1600SW flatpanel";
793 break;
794 default:
795 info->var = sgivwfb_var;
796 monitor = "CRT";
797 }
798
799 printk(KERN_INFO "sgivwfb: %s monitor selected\n", monitor);
800
801 info->fbops = &sgivwfb_ops;
802 info->pseudo_palette = (void *) (par + 1);
803 info->flags = FBINFO_DEFAULT;
804
805 info->screen_base = ioremap_nocache((unsigned long) sgivwfb_mem_phys, sgivwfb_mem_size);
806 if (!info->screen_base) {
807 printk(KERN_ERR "sgivwfb: couldn't ioremap screen_base\n");
808 goto fail_ioremap_fbmem;
809 }
810
811 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
812 goto fail_color_map;
813
814 if (register_framebuffer(info) < 0) {
815 printk(KERN_ERR "sgivwfb: couldn't register framebuffer\n");
816 goto fail_register_framebuffer;
817 }
818
819 dev_set_drvdata(&dev->dev, info);
820
821 printk(KERN_INFO "fb%d: SGI DBE frame buffer device, using %ldK of video memory at %#lx\n",
822 info->node, sgivwfb_mem_size >> 10, sgivwfb_mem_phys);
823 return 0;
824
825 fail_register_framebuffer:
826 fb_dealloc_cmap(&info->cmap);
827 fail_color_map:
828 iounmap((char *) info->screen_base);
829 fail_ioremap_fbmem:
830 iounmap(par->regs);
831 fail_ioremap_regs:
832 release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
833 framebuffer_release(info);
834 return -ENXIO;
835 }
836
837 static int sgivwfb_remove(struct device *device)
838 {
839 struct fb_info *info = dev_get_drvdata(device);
840
841 if (info) {
842 struct sgivw_par *par = info->par;
843
844 unregister_framebuffer(info);
845 dbe_TurnOffDma(par);
846 iounmap(par->regs);
847 iounmap(info->screen_base);
848 release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
849 }
850 return 0;
851 }
852
853 static struct device_driver sgivwfb_driver = {
854 .name = "sgivwfb",
855 .bus = &platform_bus_type,
856 .probe = sgivwfb_probe,
857 .remove = sgivwfb_remove,
858 };
859
860 static struct platform_device sgivwfb_device = {
861 .name = "sgivwfb",
862 .id = 0,
863 .dev = {
864 .release = sgivwfb_release,
865 }
866 };
867
868 int __init sgivwfb_init(void)
869 {
870 int ret;
871
872 #ifndef MODULE
873 char *option = NULL;
874
875 if (fb_get_options("sgivwfb", &option))
876 return -ENODEV;
877 sgivwfb_setup(option);
878 #endif
879 ret = driver_register(&sgivwfb_driver);
880 if (!ret) {
881 ret = platform_device_register(&sgivwfb_device);
882 if (ret)
883 driver_unregister(&sgivwfb_driver);
884 }
885 return ret;
886 }
887
888 module_init(sgivwfb_init);
889
890 #ifdef MODULE
891 MODULE_LICENSE("GPL");
892
893 static void __exit sgivwfb_exit(void)
894 {
895 platform_device_unregister(&sgivwfb_device);
896 driver_unregister(&sgivwfb_driver);
897 }
898
899 module_exit(sgivwfb_exit);
900
901 #endif /* MODULE */
Linux with added FPC-III support