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[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / sgivwfb.c
blobf5252c2552fdd482731eef311f3f4ff14a70f03d
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/module.h>
13 #include <linux/kernel.h>
14 #include <linux/mm.h>
15 #include <linux/errno.h>
16 #include <linux/delay.h>
17 #include <linux/fb.h>
18 #include <linux/init.h>
19 #include <linux/ioport.h>
20 #include <linux/platform_device.h>
21
22 #include <asm/io.h>
23 #include <asm/mtrr.h>
24 #include <asm/visws/sgivw.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 static int ypan = 0;
46 static int ywrap = 0;
47
48 static int flatpanel_id = -1;
49
50 static struct fb_fix_screeninfo sgivwfb_fix __initdata = {
51 .id = "SGI Vis WS FB",
52 .type = FB_TYPE_PACKED_PIXELS,
53 .visual = FB_VISUAL_PSEUDOCOLOR,
54 .mmio_start = DBE_REG_PHYS,
55 .mmio_len = DBE_REG_SIZE,
56 .accel = FB_ACCEL_NONE,
57 .line_length = 640,
58 };
59
60 static struct fb_var_screeninfo sgivwfb_var __initdata = {
61 /* 640x480, 8 bpp */
62 .xres = 640,
63 .yres = 480,
64 .xres_virtual = 640,
65 .yres_virtual = 480,
66 .bits_per_pixel = 8,
67 .red = { 0, 8, 0 },
68 .green = { 0, 8, 0 },
69 .blue = { 0, 8, 0 },
70 .height = -1,
71 .width = -1,
72 .pixclock = 20000,
73 .left_margin = 64,
74 .right_margin = 64,
75 .upper_margin = 32,
76 .lower_margin = 32,
77 .hsync_len = 64,
78 .vsync_len = 2,
79 .vmode = FB_VMODE_NONINTERLACED
80 };
81
82 static struct fb_var_screeninfo sgivwfb_var1600sw __initdata = {
83 /* 1600x1024, 8 bpp */
84 .xres = 1600,
85 .yres = 1024,
86 .xres_virtual = 1600,
87 .yres_virtual = 1024,
88 .bits_per_pixel = 8,
89 .red = { 0, 8, 0 },
90 .green = { 0, 8, 0 },
91 .blue = { 0, 8, 0 },
92 .height = -1,
93 .width = -1,
94 .pixclock = 9353,
95 .left_margin = 20,
96 .right_margin = 30,
97 .upper_margin = 37,
98 .lower_margin = 3,
99 .hsync_len = 20,
100 .vsync_len = 3,
101 .vmode = FB_VMODE_NONINTERLACED
102 };
103
104 /*
105 * Interface used by the world
106 */
107 int sgivwfb_init(void);
108
109 static int sgivwfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
110 static int sgivwfb_set_par(struct fb_info *info);
111 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
112 u_int blue, u_int transp,
113 struct fb_info *info);
114 static int sgivwfb_mmap(struct fb_info *info,
115 struct vm_area_struct *vma);
116
117 static struct fb_ops sgivwfb_ops = {
118 .owner = THIS_MODULE,
119 .fb_check_var = sgivwfb_check_var,
120 .fb_set_par = sgivwfb_set_par,
121 .fb_setcolreg = sgivwfb_setcolreg,
122 .fb_fillrect = cfb_fillrect,
123 .fb_copyarea = cfb_copyarea,
124 .fb_imageblit = cfb_imageblit,
125 .fb_mmap = sgivwfb_mmap,
126 };
127
128 /*
129 * Internal routines
130 */
131 static unsigned long bytes_per_pixel(int bpp)
132 {
133 switch (bpp) {
134 case 8:
135 return 1;
136 case 16:
137 return 2;
138 case 32:
139 return 4;
140 default:
141 printk(KERN_INFO "sgivwfb: unsupported bpp %d\n", bpp);
142 return 0;
143 }
144 }
145
146 static unsigned long get_line_length(int xres_virtual, int bpp)
147 {
148 return (xres_virtual * bytes_per_pixel(bpp));
149 }
150
151 /*
152 * Function: dbe_TurnOffDma
153 * Parameters: (None)
154 * Description: This should turn off the monitor and dbe. This is used
155 * when switching between the serial console and the graphics
156 * console.
157 */
158
159 static void dbe_TurnOffDma(struct sgivw_par *par)
160 {
161 unsigned int readVal;
162 int i;
163
164 // Check to see if things are already turned off:
165 // 1) Check to see if dbe is not using the internal dotclock.
166 // 2) Check to see if the xy counter in dbe is already off.
167
168 DBE_GETREG(ctrlstat, readVal);
169 if (GET_DBE_FIELD(CTRLSTAT, PCLKSEL, readVal) < 2)
170 return;
171
172 DBE_GETREG(vt_xy, readVal);
173 if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1)
174 return;
175
176 // Otherwise, turn off dbe
177
178 DBE_GETREG(ovr_control, readVal);
179 SET_DBE_FIELD(OVR_CONTROL, OVR_DMA_ENABLE, readVal, 0);
180 DBE_SETREG(ovr_control, readVal);
181 udelay(1000);
182 DBE_GETREG(frm_control, readVal);
183 SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, readVal, 0);
184 DBE_SETREG(frm_control, readVal);
185 udelay(1000);
186 DBE_GETREG(did_control, readVal);
187 SET_DBE_FIELD(DID_CONTROL, DID_DMA_ENABLE, readVal, 0);
188 DBE_SETREG(did_control, readVal);
189 udelay(1000);
190
191 // XXX HACK:
192 //
193 // This was necessary for GBE--we had to wait through two
194 // vertical retrace periods before the pixel DMA was
195 // turned off for sure. I've left this in for now, in
196 // case dbe needs it.
197
198 for (i = 0; i < 10000; i++) {
199 DBE_GETREG(frm_inhwctrl, readVal);
200 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) ==
201 0)
202 udelay(10);
203 else {
204 DBE_GETREG(ovr_inhwctrl, readVal);
205 if (GET_DBE_FIELD
206 (OVR_INHWCTRL, OVR_DMA_ENABLE, readVal) == 0)
207 udelay(10);
208 else {
209 DBE_GETREG(did_inhwctrl, readVal);
210 if (GET_DBE_FIELD
211 (DID_INHWCTRL, DID_DMA_ENABLE,
212 readVal) == 0)
213 udelay(10);
214 else
215 break;
216 }
217 }
218 }
219 }
220
221 /*
222 * Set the User Defined Part of the Display. Again if par use it to get
223 * real video mode.
224 */
225 static int sgivwfb_check_var(struct fb_var_screeninfo *var,
226 struct fb_info *info)
227 {
228 struct sgivw_par *par = (struct sgivw_par *)info->par;
229 struct dbe_timing_info *timing;
230 u_long line_length;
231 u_long min_mode;
232 int req_dot;
233 int test_mode;
234
235 /*
236 * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
237 * as FB_VMODE_SMOOTH_XPAN is only used internally
238 */
239
240 if (var->vmode & FB_VMODE_CONUPDATE) {
241 var->vmode |= FB_VMODE_YWRAP;
242 var->xoffset = info->var.xoffset;
243 var->yoffset = info->var.yoffset;
244 }
245
246 /* XXX FIXME - forcing var's */
247 var->xoffset = 0;
248 var->yoffset = 0;
249
250 /* Limit bpp to 8, 16, and 32 */
251 if (var->bits_per_pixel <= 8)
252 var->bits_per_pixel = 8;
253 else if (var->bits_per_pixel <= 16)
254 var->bits_per_pixel = 16;
255 else if (var->bits_per_pixel <= 32)
256 var->bits_per_pixel = 32;
257 else
258 return -EINVAL;
259
260 var->grayscale = 0; /* No grayscale for now */
261
262 /* determine valid resolution and timing */
263 for (min_mode = 0; min_mode < DBE_VT_SIZE; min_mode++) {
264 if (dbeVTimings[min_mode].width >= var->xres &&
265 dbeVTimings[min_mode].height >= var->yres)
266 break;
267 }
268
269 if (min_mode == DBE_VT_SIZE)
270 return -EINVAL; /* Resolution to high */
271
272 /* XXX FIXME - should try to pick best refresh rate */
273 /* for now, pick closest dot-clock within 3MHz */
274 req_dot = PICOS2KHZ(var->pixclock);
275 printk(KERN_INFO "sgivwfb: requested pixclock=%d ps (%d KHz)\n",
276 var->pixclock, req_dot);
277 test_mode = min_mode;
278 while (dbeVTimings[min_mode].width == dbeVTimings[test_mode].width) {
279 if (dbeVTimings[test_mode].cfreq + 3000 > req_dot)
280 break;
281 test_mode++;
282 }
283 if (dbeVTimings[min_mode].width != dbeVTimings[test_mode].width)
284 test_mode--;
285 min_mode = test_mode;
286 timing = &dbeVTimings[min_mode];
287 printk(KERN_INFO "sgivwfb: granted dot-clock=%d KHz\n", timing->cfreq);
288
289 /* Adjust virtual resolution, if necessary */
290 if (var->xres > var->xres_virtual || (!ywrap && !ypan))
291 var->xres_virtual = var->xres;
292 if (var->yres > var->yres_virtual || (!ywrap && !ypan))
293 var->yres_virtual = var->yres;
294
295 /*
296 * Memory limit
297 */
298 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
299 if (line_length * var->yres_virtual > sgivwfb_mem_size)
300 return -ENOMEM; /* Virtual resolution to high */
301
302 info->fix.line_length = line_length;
303
304 switch (var->bits_per_pixel) {
305 case 8:
306 var->red.offset = 0;
307 var->red.length = 8;
308 var->green.offset = 0;
309 var->green.length = 8;
310 var->blue.offset = 0;
311 var->blue.length = 8;
312 var->transp.offset = 0;
313 var->transp.length = 0;
314 break;
315 case 16: /* RGBA 5551 */
316 var->red.offset = 11;
317 var->red.length = 5;
318 var->green.offset = 6;
319 var->green.length = 5;
320 var->blue.offset = 1;
321 var->blue.length = 5;
322 var->transp.offset = 0;
323 var->transp.length = 0;
324 break;
325 case 32: /* RGB 8888 */
326 var->red.offset = 0;
327 var->red.length = 8;
328 var->green.offset = 8;
329 var->green.length = 8;
330 var->blue.offset = 16;
331 var->blue.length = 8;
332 var->transp.offset = 24;
333 var->transp.length = 8;
334 break;
335 }
336 var->red.msb_right = 0;
337 var->green.msb_right = 0;
338 var->blue.msb_right = 0;
339 var->transp.msb_right = 0;
340
341 /* set video timing information */
342 var->pixclock = KHZ2PICOS(timing->cfreq);
343 var->left_margin = timing->htotal - timing->hsync_end;
344 var->right_margin = timing->hsync_start - timing->width;
345 var->upper_margin = timing->vtotal - timing->vsync_end;
346 var->lower_margin = timing->vsync_start - timing->height;
347 var->hsync_len = timing->hsync_end - timing->hsync_start;
348 var->vsync_len = timing->vsync_end - timing->vsync_start;
349
350 /* Ouch. This breaks the rules but timing_num is only important if you
351 * change a video mode */
352 par->timing_num = min_mode;
353
354 printk(KERN_INFO "sgivwfb: new video mode xres=%d yres=%d bpp=%d\n",
355 var->xres, var->yres, var->bits_per_pixel);
356 printk(KERN_INFO " vxres=%d vyres=%d\n", var->xres_virtual,
357 var->yres_virtual);
358 return 0;
359 }
360
361 /*
362 * Setup flatpanel related registers.
363 */
364 static void sgivwfb_setup_flatpanel(struct sgivw_par *par, struct dbe_timing_info *currentTiming)
365 {
366 int fp_wid, fp_hgt, fp_vbs, fp_vbe;
367 u32 outputVal = 0;
368
369 SET_DBE_FIELD(VT_FLAGS, HDRV_INVERT, outputVal,
370 (currentTiming->flags & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1);
371 SET_DBE_FIELD(VT_FLAGS, VDRV_INVERT, outputVal,
372 (currentTiming->flags & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1);
373 DBE_SETREG(vt_flags, outputVal);
374
375 /* Turn on the flat panel */
376 switch (flatpanel_id) {
377 case FLATPANEL_SGI_1600SW:
378 fp_wid = 1600;
379 fp_hgt = 1024;
380 fp_vbs = 0;
381 fp_vbe = 1600;
382 currentTiming->pll_m = 4;
383 currentTiming->pll_n = 1;
384 currentTiming->pll_p = 0;
385 break;
386 default:
387 fp_wid = fp_hgt = fp_vbs = fp_vbe = 0xfff;
388 }
389
390 outputVal = 0;
391 SET_DBE_FIELD(FP_DE, FP_DE_ON, outputVal, fp_vbs);
392 SET_DBE_FIELD(FP_DE, FP_DE_OFF, outputVal, fp_vbe);
393 DBE_SETREG(fp_de, outputVal);
394 outputVal = 0;
395 SET_DBE_FIELD(FP_HDRV, FP_HDRV_OFF, outputVal, fp_wid);
396 DBE_SETREG(fp_hdrv, outputVal);
397 outputVal = 0;
398 SET_DBE_FIELD(FP_VDRV, FP_VDRV_ON, outputVal, 1);
399 SET_DBE_FIELD(FP_VDRV, FP_VDRV_OFF, outputVal, fp_hgt + 1);
400 DBE_SETREG(fp_vdrv, outputVal);
401 }
402
403 /*
404 * Set the hardware according to 'par'.
405 */
406 static int sgivwfb_set_par(struct fb_info *info)
407 {
408 struct sgivw_par *par = info->par;
409 int i, j, htmp, temp;
410 u32 readVal, outputVal;
411 int wholeTilesX, maxPixelsPerTileX;
412 int frmWrite1, frmWrite2, frmWrite3b;
413 struct dbe_timing_info *currentTiming; /* Current Video Timing */
414 int xpmax, ypmax; // Monitor resolution
415 int bytesPerPixel; // Bytes per pixel
416
417 currentTiming = &dbeVTimings[par->timing_num];
418 bytesPerPixel = bytes_per_pixel(info->var.bits_per_pixel);
419 xpmax = currentTiming->width;
420 ypmax = currentTiming->height;
421
422 /* dbe_InitGraphicsBase(); */
423 /* Turn on dotclock PLL */
424 DBE_SETREG(ctrlstat, 0x20000000);
425
426 dbe_TurnOffDma(par);
427
428 /* dbe_CalculateScreenParams(); */
429 maxPixelsPerTileX = 512 / bytesPerPixel;
430 wholeTilesX = xpmax / maxPixelsPerTileX;
431 if (wholeTilesX * maxPixelsPerTileX < xpmax)
432 wholeTilesX++;
433
434 printk(KERN_DEBUG "sgivwfb: pixPerTile=%d wholeTilesX=%d\n",
435 maxPixelsPerTileX, wholeTilesX);
436
437 /* dbe_InitGammaMap(); */
438 udelay(10);
439
440 for (i = 0; i < 256; i++) {
441 DBE_ISETREG(gmap, i, (i << 24) | (i << 16) | (i << 8));
442 }
443
444 /* dbe_TurnOn(); */
445 DBE_GETREG(vt_xy, readVal);
446 if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1) {
447 DBE_SETREG(vt_xy, 0x00000000);
448 udelay(1);
449 } else
450 dbe_TurnOffDma(par);
451
452 /* dbe_Initdbe(); */
453 for (i = 0; i < 256; i++) {
454 for (j = 0; j < 100; j++) {
455 DBE_GETREG(cm_fifo, readVal);
456 if (readVal != 0x00000000)
457 break;
458 else
459 udelay(10);
460 }
461
462 // DBE_ISETREG(cmap, i, 0x00000000);
463 DBE_ISETREG(cmap, i, (i << 8) | (i << 16) | (i << 24));
464 }
465
466 /* dbe_InitFramebuffer(); */
467 frmWrite1 = 0;
468 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_WIDTH_TILE, frmWrite1,
469 wholeTilesX);
470 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_RHS, frmWrite1, 0);
471
472 switch (bytesPerPixel) {
473 case 1:
474 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
475 DBE_FRM_DEPTH_8);
476 break;
477 case 2:
478 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
479 DBE_FRM_DEPTH_16);
480 break;
481 case 4:
482 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
483 DBE_FRM_DEPTH_32);
484 break;
485 }
486
487 frmWrite2 = 0;
488 SET_DBE_FIELD(FRM_SIZE_PIXEL, FB_HEIGHT_PIX, frmWrite2, ypmax);
489
490 // Tell dbe about the framebuffer location and type
491 // XXX What format is the FRM_TILE_PTR?? 64K aligned address?
492 frmWrite3b = 0;
493 SET_DBE_FIELD(FRM_CONTROL, FRM_TILE_PTR, frmWrite3b,
494 sgivwfb_mem_phys >> 9);
495 SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, frmWrite3b, 1);
496 SET_DBE_FIELD(FRM_CONTROL, FRM_LINEAR, frmWrite3b, 1);
497
498 /* Initialize DIDs */
499
500 outputVal = 0;
501 switch (bytesPerPixel) {
502 case 1:
503 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_I8);
504 break;
505 case 2:
506 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGBA5);
507 break;
508 case 4:
509 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGB8);
510 break;
511 }
512 SET_DBE_FIELD(WID, BUF, outputVal, DBE_BMODE_BOTH);
513
514 for (i = 0; i < 32; i++) {
515 DBE_ISETREG(mode_regs, i, outputVal);
516 }
517
518 /* dbe_InitTiming(); */
519 DBE_SETREG(vt_intr01, 0xffffffff);
520 DBE_SETREG(vt_intr23, 0xffffffff);
521
522 DBE_GETREG(dotclock, readVal);
523 DBE_SETREG(dotclock, readVal & 0xffff);
524
525 DBE_SETREG(vt_xymax, 0x00000000);
526 outputVal = 0;
527 SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_ON, outputVal,
528 currentTiming->vsync_start);
529 SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_OFF, outputVal,
530 currentTiming->vsync_end);
531 DBE_SETREG(vt_vsync, outputVal);
532 outputVal = 0;
533 SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_ON, outputVal,
534 currentTiming->hsync_start);
535 SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_OFF, outputVal,
536 currentTiming->hsync_end);
537 DBE_SETREG(vt_hsync, outputVal);
538 outputVal = 0;
539 SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_ON, outputVal,
540 currentTiming->vblank_start);
541 SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_OFF, outputVal,
542 currentTiming->vblank_end);
543 DBE_SETREG(vt_vblank, outputVal);
544 outputVal = 0;
545 SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_ON, outputVal,
546 currentTiming->hblank_start);
547 SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_OFF, outputVal,
548 currentTiming->hblank_end - 3);
549 DBE_SETREG(vt_hblank, outputVal);
550 outputVal = 0;
551 SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_ON, outputVal,
552 currentTiming->vblank_start);
553 SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_OFF, outputVal,
554 currentTiming->vblank_end);
555 DBE_SETREG(vt_vcmap, outputVal);
556 outputVal = 0;
557 SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_ON, outputVal,
558 currentTiming->hblank_start);
559 SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_OFF, outputVal,
560 currentTiming->hblank_end - 3);
561 DBE_SETREG(vt_hcmap, outputVal);
562
563 if (flatpanel_id != -1)
564 sgivwfb_setup_flatpanel(par, currentTiming);
565
566 outputVal = 0;
567 temp = currentTiming->vblank_start - currentTiming->vblank_end - 1;
568 if (temp > 0)
569 temp = -temp;
570
571 SET_DBE_FIELD(DID_START_XY, DID_STARTY, outputVal, (u32) temp);
572 if (currentTiming->hblank_end >= 20)
573 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
574 currentTiming->hblank_end - 20);
575 else
576 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
577 currentTiming->htotal - (20 -
578 currentTiming->
579 hblank_end));
580 DBE_SETREG(did_start_xy, outputVal);
581
582 outputVal = 0;
583 SET_DBE_FIELD(CRS_START_XY, CRS_STARTY, outputVal,
584 (u32) (temp + 1));
585 if (currentTiming->hblank_end >= DBE_CRS_MAGIC)
586 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
587 currentTiming->hblank_end - DBE_CRS_MAGIC);
588 else
589 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
590 currentTiming->htotal - (DBE_CRS_MAGIC -
591 currentTiming->
592 hblank_end));
593 DBE_SETREG(crs_start_xy, outputVal);
594
595 outputVal = 0;
596 SET_DBE_FIELD(VC_START_XY, VC_STARTY, outputVal, (u32) temp);
597 SET_DBE_FIELD(VC_START_XY, VC_STARTX, outputVal,
598 currentTiming->hblank_end - 4);
599 DBE_SETREG(vc_start_xy, outputVal);
600
601 DBE_SETREG(frm_size_tile, frmWrite1);
602 DBE_SETREG(frm_size_pixel, frmWrite2);
603
604 outputVal = 0;
605 SET_DBE_FIELD(DOTCLK, M, outputVal, currentTiming->pll_m - 1);
606 SET_DBE_FIELD(DOTCLK, N, outputVal, currentTiming->pll_n - 1);
607 SET_DBE_FIELD(DOTCLK, P, outputVal, currentTiming->pll_p);
608 SET_DBE_FIELD(DOTCLK, RUN, outputVal, 1);
609 DBE_SETREG(dotclock, outputVal);
610
611 udelay(11 * 1000);
612
613 DBE_SETREG(vt_vpixen, 0xffffff);
614 DBE_SETREG(vt_hpixen, 0xffffff);
615
616 outputVal = 0;
617 SET_DBE_FIELD(VT_XYMAX, VT_MAXX, outputVal, currentTiming->htotal);
618 SET_DBE_FIELD(VT_XYMAX, VT_MAXY, outputVal, currentTiming->vtotal);
619 DBE_SETREG(vt_xymax, outputVal);
620
621 outputVal = frmWrite1;
622 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, outputVal, 1);
623 DBE_SETREG(frm_size_tile, outputVal);
624 DBE_SETREG(frm_size_tile, frmWrite1);
625
626 outputVal = 0;
627 SET_DBE_FIELD(OVR_WIDTH_TILE, OVR_FIFO_RESET, outputVal, 1);
628 DBE_SETREG(ovr_width_tile, outputVal);
629 DBE_SETREG(ovr_width_tile, 0);
630
631 DBE_SETREG(frm_control, frmWrite3b);
632 DBE_SETREG(did_control, 0);
633
634 // Wait for dbe to take frame settings
635 for (i = 0; i < 100000; i++) {
636 DBE_GETREG(frm_inhwctrl, readVal);
637 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) !=
638 0)
639 break;
640 else
641 udelay(1);
642 }
643
644 if (i == 100000)
645 printk(KERN_INFO
646 "sgivwfb: timeout waiting for frame DMA enable.\n");
647
648 outputVal = 0;
649 htmp = currentTiming->hblank_end - 19;
650 if (htmp < 0)
651 htmp += currentTiming->htotal; /* allow blank to wrap around */
652 SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_ON, outputVal, htmp);
653 SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_OFF, outputVal,
654 ((htmp + currentTiming->width -
655 2) % currentTiming->htotal));
656 DBE_SETREG(vt_hpixen, outputVal);
657
658 outputVal = 0;
659 SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_OFF, outputVal,
660 currentTiming->vblank_start);
661 SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_ON, outputVal,
662 currentTiming->vblank_end);
663 DBE_SETREG(vt_vpixen, outputVal);
664
665 // Turn off mouse cursor
666 par->regs->crs_ctl = 0;
667
668 // XXX What's this section for??
669 DBE_GETREG(ctrlstat, readVal);
670 readVal &= 0x02000000;
671
672 if (readVal != 0) {
673 DBE_SETREG(ctrlstat, 0x30000000);
674 }
675 return 0;
676 }
677
678 /*
679 * Set a single color register. The values supplied are already
680 * rounded down to the hardware's capabilities (according to the
681 * entries in the var structure). Return != 0 for invalid regno.
682 */
683
684 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
685 u_int blue, u_int transp,
686 struct fb_info *info)
687 {
688 struct sgivw_par *par = (struct sgivw_par *) info->par;
689
690 if (regno > 255)
691 return 1;
692 red >>= 8;
693 green >>= 8;
694 blue >>= 8;
695
696 /* wait for the color map FIFO to have a free entry */
697 while (par->cmap_fifo == 0)
698 par->cmap_fifo = par->regs->cm_fifo;
699
700 par->regs->cmap[regno] = (red << 24) | (green << 16) | (blue << 8);
701 par->cmap_fifo--; /* assume FIFO is filling up */
702 return 0;
703 }
704
705 static int sgivwfb_mmap(struct fb_info *info,
706 struct vm_area_struct *vma)
707 {
708 unsigned long size = vma->vm_end - vma->vm_start;
709 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
710
711 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
712 return -EINVAL;
713 if (offset + size > sgivwfb_mem_size)
714 return -EINVAL;
715 offset += sgivwfb_mem_phys;
716 pgprot_val(vma->vm_page_prot) =
717 pgprot_val(vma->vm_page_prot) | _PAGE_PCD;
718 vma->vm_flags |= VM_IO;
719 if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
720 size, vma->vm_page_prot))
721 return -EAGAIN;
722 printk(KERN_DEBUG "sgivwfb: mmap framebuffer P(%lx)->V(%lx)\n",
723 offset, vma->vm_start);
724 return 0;
725 }
726
727 int __init sgivwfb_setup(char *options)
728 {
729 char *this_opt;
730
731 if (!options || !*options)
732 return 0;
733
734 while ((this_opt = strsep(&options, ",")) != NULL) {
735 if (!strncmp(this_opt, "monitor:", 8)) {
736 if (!strncmp(this_opt + 8, "crt", 3))
737 flatpanel_id = -1;
738 else if (!strncmp(this_opt + 8, "1600sw", 6))
739 flatpanel_id = FLATPANEL_SGI_1600SW;
740 }
741 }
742 return 0;
743 }
744
745 /*
746 * Initialisation
747 */
748 static int __init sgivwfb_probe(struct platform_device *dev)
749 {
750 struct sgivw_par *par;
751 struct fb_info *info;
752 char *monitor;
753
754 info = framebuffer_alloc(sizeof(struct sgivw_par) + sizeof(u32) * 16, &dev->dev);
755 if (!info)
756 return -ENOMEM;
757 par = info->par;
758
759 if (!request_mem_region(DBE_REG_PHYS, DBE_REG_SIZE, "sgivwfb")) {
760 printk(KERN_ERR "sgivwfb: couldn't reserve mmio region\n");
761 framebuffer_release(info);
762 return -EBUSY;
763 }
764
765 par->regs = (struct asregs *) ioremap_nocache(DBE_REG_PHYS, DBE_REG_SIZE);
766 if (!par->regs) {
767 printk(KERN_ERR "sgivwfb: couldn't ioremap registers\n");
768 goto fail_ioremap_regs;
769 }
770
771 mtrr_add(sgivwfb_mem_phys, sgivwfb_mem_size, MTRR_TYPE_WRCOMB, 1);
772
773 sgivwfb_fix.smem_start = sgivwfb_mem_phys;
774 sgivwfb_fix.smem_len = sgivwfb_mem_size;
775 sgivwfb_fix.ywrapstep = ywrap;
776 sgivwfb_fix.ypanstep = ypan;
777
778 info->fix = sgivwfb_fix;
779
780 switch (flatpanel_id) {
781 case FLATPANEL_SGI_1600SW:
782 info->var = sgivwfb_var1600sw;
783 monitor = "SGI 1600SW flatpanel";
784 break;
785 default:
786 info->var = sgivwfb_var;
787 monitor = "CRT";
788 }
789
790 printk(KERN_INFO "sgivwfb: %s monitor selected\n", monitor);
791
792 info->fbops = &sgivwfb_ops;
793 info->pseudo_palette = (void *) (par + 1);
794 info->flags = FBINFO_DEFAULT;
795
796 info->screen_base = ioremap_nocache((unsigned long) sgivwfb_mem_phys, sgivwfb_mem_size);
797 if (!info->screen_base) {
798 printk(KERN_ERR "sgivwfb: couldn't ioremap screen_base\n");
799 goto fail_ioremap_fbmem;
800 }
801
802 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
803 goto fail_color_map;
804
805 if (register_framebuffer(info) < 0) {
806 printk(KERN_ERR "sgivwfb: couldn't register framebuffer\n");
807 goto fail_register_framebuffer;
808 }
809
810 platform_set_drvdata(dev, info);
811
812 printk(KERN_INFO "fb%d: SGI DBE frame buffer device, using %ldK of video memory at %#lx\n",
813 info->node, sgivwfb_mem_size >> 10, sgivwfb_mem_phys);
814 return 0;
815
816 fail_register_framebuffer:
817 fb_dealloc_cmap(&info->cmap);
818 fail_color_map:
819 iounmap((char *) info->screen_base);
820 fail_ioremap_fbmem:
821 iounmap(par->regs);
822 fail_ioremap_regs:
823 release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
824 framebuffer_release(info);
825 return -ENXIO;
826 }
827
828 static int sgivwfb_remove(struct platform_device *dev)
829 {
830 struct fb_info *info = platform_get_drvdata(dev);
831
832 if (info) {
833 struct sgivw_par *par = info->par;
834
835 unregister_framebuffer(info);
836 dbe_TurnOffDma(par);
837 iounmap(par->regs);
838 iounmap(info->screen_base);
839 release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
840 }
841 return 0;
842 }
843
844 static struct platform_driver sgivwfb_driver = {
845 .probe = sgivwfb_probe,
846 .remove = sgivwfb_remove,
847 .driver = {
848 .name = "sgivwfb",
849 },
850 };
851
852 static struct platform_device *sgivwfb_device;
853
854 int __init sgivwfb_init(void)
855 {
856 int ret;
857
858 #ifndef MODULE
859 char *option = NULL;
860
861 if (fb_get_options("sgivwfb", &option))
862 return -ENODEV;
863 sgivwfb_setup(option);
864 #endif
865 ret = platform_driver_register(&sgivwfb_driver);
866 if (!ret) {
867 sgivwfb_device = platform_device_alloc("sgivwfb", 0);
868 if (sgivwfb_device) {
869 ret = platform_device_add(sgivwfb_device);
870 } else
871 ret = -ENOMEM;
872 if (ret) {
873 platform_driver_unregister(&sgivwfb_driver);
874 platform_device_put(sgivwfb_device);
875 }
876 }
877 return ret;
878 }
879
880 module_init(sgivwfb_init);
881
882 #ifdef MODULE
883 MODULE_LICENSE("GPL");
884
885 static void __exit sgivwfb_exit(void)
886 {
887 platform_device_unregister(sgivwfb_device);
888 platform_driver_unregister(&sgivwfb_driver);
889 }
890
891 module_exit(sgivwfb_exit);
892
893 #endif /* MODULE */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree