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[PATCH] VFS: extra check inside dentry_unhash()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / sgivwfb.c
blobebb6756aea0894b9546db8b7a1e8ff2b739fa7c8
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
25 #include <setup_arch.h>
26
27 #define INCLUDE_TIMING_TABLE_DATA
28 #define DBE_REG_BASE par->regs
29 #include <video/sgivw.h>
30
31 struct sgivw_par {
32 struct asregs *regs;
33 u32 cmap_fifo;
34 u_long timing_num;
35 };
36
37 #define FLATPANEL_SGI_1600SW 5
38
39 /*
40 * RAM we reserve for the frame buffer. This defines the maximum screen
41 * size
42 *
43 * The default can be overridden if the driver is compiled as a module
44 */
45
46 static int ypan = 0;
47 static int ywrap = 0;
48
49 static int flatpanel_id = -1;
50
51 static struct fb_fix_screeninfo sgivwfb_fix __initdata = {
52 .id = "SGI Vis WS FB",
53 .type = FB_TYPE_PACKED_PIXELS,
54 .visual = FB_VISUAL_PSEUDOCOLOR,
55 .mmio_start = DBE_REG_PHYS,
56 .mmio_len = DBE_REG_SIZE,
57 .accel = FB_ACCEL_NONE,
58 .line_length = 640,
59 };
60
61 static struct fb_var_screeninfo sgivwfb_var __initdata = {
62 /* 640x480, 8 bpp */
63 .xres = 640,
64 .yres = 480,
65 .xres_virtual = 640,
66 .yres_virtual = 480,
67 .bits_per_pixel = 8,
68 .red = { 0, 8, 0 },
69 .green = { 0, 8, 0 },
70 .blue = { 0, 8, 0 },
71 .height = -1,
72 .width = -1,
73 .pixclock = 20000,
74 .left_margin = 64,
75 .right_margin = 64,
76 .upper_margin = 32,
77 .lower_margin = 32,
78 .hsync_len = 64,
79 .vsync_len = 2,
80 .vmode = FB_VMODE_NONINTERLACED
81 };
82
83 static struct fb_var_screeninfo sgivwfb_var1600sw __initdata = {
84 /* 1600x1024, 8 bpp */
85 .xres = 1600,
86 .yres = 1024,
87 .xres_virtual = 1600,
88 .yres_virtual = 1024,
89 .bits_per_pixel = 8,
90 .red = { 0, 8, 0 },
91 .green = { 0, 8, 0 },
92 .blue = { 0, 8, 0 },
93 .height = -1,
94 .width = -1,
95 .pixclock = 9353,
96 .left_margin = 20,
97 .right_margin = 30,
98 .upper_margin = 37,
99 .lower_margin = 3,
100 .hsync_len = 20,
101 .vsync_len = 3,
102 .vmode = FB_VMODE_NONINTERLACED
103 };
104
105 /*
106 * Interface used by the world
107 */
108 int sgivwfb_init(void);
109
110 static int sgivwfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
111 static int sgivwfb_set_par(struct fb_info *info);
112 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
113 u_int blue, u_int transp,
114 struct fb_info *info);
115 static int sgivwfb_mmap(struct fb_info *info,
116 struct vm_area_struct *vma);
117
118 static struct fb_ops sgivwfb_ops = {
119 .owner = THIS_MODULE,
120 .fb_check_var = sgivwfb_check_var,
121 .fb_set_par = sgivwfb_set_par,
122 .fb_setcolreg = sgivwfb_setcolreg,
123 .fb_fillrect = cfb_fillrect,
124 .fb_copyarea = cfb_copyarea,
125 .fb_imageblit = cfb_imageblit,
126 .fb_mmap = sgivwfb_mmap,
127 };
128
129 /*
130 * Internal routines
131 */
132 static unsigned long bytes_per_pixel(int bpp)
133 {
134 switch (bpp) {
135 case 8:
136 return 1;
137 case 16:
138 return 2;
139 case 32:
140 return 4;
141 default:
142 printk(KERN_INFO "sgivwfb: unsupported bpp %d\n", bpp);
143 return 0;
144 }
145 }
146
147 static unsigned long get_line_length(int xres_virtual, int bpp)
148 {
149 return (xres_virtual * bytes_per_pixel(bpp));
150 }
151
152 /*
153 * Function: dbe_TurnOffDma
154 * Parameters: (None)
155 * Description: This should turn off the monitor and dbe. This is used
156 * when switching between the serial console and the graphics
157 * console.
158 */
159
160 static void dbe_TurnOffDma(struct sgivw_par *par)
161 {
162 unsigned int readVal;
163 int i;
164
165 // Check to see if things are already turned off:
166 // 1) Check to see if dbe is not using the internal dotclock.
167 // 2) Check to see if the xy counter in dbe is already off.
168
169 DBE_GETREG(ctrlstat, readVal);
170 if (GET_DBE_FIELD(CTRLSTAT, PCLKSEL, readVal) < 2)
171 return;
172
173 DBE_GETREG(vt_xy, readVal);
174 if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1)
175 return;
176
177 // Otherwise, turn off dbe
178
179 DBE_GETREG(ovr_control, readVal);
180 SET_DBE_FIELD(OVR_CONTROL, OVR_DMA_ENABLE, readVal, 0);
181 DBE_SETREG(ovr_control, readVal);
182 udelay(1000);
183 DBE_GETREG(frm_control, readVal);
184 SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, readVal, 0);
185 DBE_SETREG(frm_control, readVal);
186 udelay(1000);
187 DBE_GETREG(did_control, readVal);
188 SET_DBE_FIELD(DID_CONTROL, DID_DMA_ENABLE, readVal, 0);
189 DBE_SETREG(did_control, readVal);
190 udelay(1000);
191
192 // XXX HACK:
193 //
194 // This was necessary for GBE--we had to wait through two
195 // vertical retrace periods before the pixel DMA was
196 // turned off for sure. I've left this in for now, in
197 // case dbe needs it.
198
199 for (i = 0; i < 10000; i++) {
200 DBE_GETREG(frm_inhwctrl, readVal);
201 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) ==
202 0)
203 udelay(10);
204 else {
205 DBE_GETREG(ovr_inhwctrl, readVal);
206 if (GET_DBE_FIELD
207 (OVR_INHWCTRL, OVR_DMA_ENABLE, readVal) == 0)
208 udelay(10);
209 else {
210 DBE_GETREG(did_inhwctrl, readVal);
211 if (GET_DBE_FIELD
212 (DID_INHWCTRL, DID_DMA_ENABLE,
213 readVal) == 0)
214 udelay(10);
215 else
216 break;
217 }
218 }
219 }
220 }
221
222 /*
223 * Set the User Defined Part of the Display. Again if par use it to get
224 * real video mode.
225 */
226 static int sgivwfb_check_var(struct fb_var_screeninfo *var,
227 struct fb_info *info)
228 {
229 struct sgivw_par *par = (struct sgivw_par *)info->par;
230 struct dbe_timing_info *timing;
231 u_long line_length;
232 u_long min_mode;
233 int req_dot;
234 int test_mode;
235
236 /*
237 * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
238 * as FB_VMODE_SMOOTH_XPAN is only used internally
239 */
240
241 if (var->vmode & FB_VMODE_CONUPDATE) {
242 var->vmode |= FB_VMODE_YWRAP;
243 var->xoffset = info->var.xoffset;
244 var->yoffset = info->var.yoffset;
245 }
246
247 /* XXX FIXME - forcing var's */
248 var->xoffset = 0;
249 var->yoffset = 0;
250
251 /* Limit bpp to 8, 16, and 32 */
252 if (var->bits_per_pixel <= 8)
253 var->bits_per_pixel = 8;
254 else if (var->bits_per_pixel <= 16)
255 var->bits_per_pixel = 16;
256 else if (var->bits_per_pixel <= 32)
257 var->bits_per_pixel = 32;
258 else
259 return -EINVAL;
260
261 var->grayscale = 0; /* No grayscale for now */
262
263 /* determine valid resolution and timing */
264 for (min_mode = 0; min_mode < DBE_VT_SIZE; min_mode++) {
265 if (dbeVTimings[min_mode].width >= var->xres &&
266 dbeVTimings[min_mode].height >= var->yres)
267 break;
268 }
269
270 if (min_mode == DBE_VT_SIZE)
271 return -EINVAL; /* Resolution to high */
272
273 /* XXX FIXME - should try to pick best refresh rate */
274 /* for now, pick closest dot-clock within 3MHz */
275 req_dot = PICOS2KHZ(var->pixclock);
276 printk(KERN_INFO "sgivwfb: requested pixclock=%d ps (%d KHz)\n",
277 var->pixclock, req_dot);
278 test_mode = min_mode;
279 while (dbeVTimings[min_mode].width == dbeVTimings[test_mode].width) {
280 if (dbeVTimings[test_mode].cfreq + 3000 > req_dot)
281 break;
282 test_mode++;
283 }
284 if (dbeVTimings[min_mode].width != dbeVTimings[test_mode].width)
285 test_mode--;
286 min_mode = test_mode;
287 timing = &dbeVTimings[min_mode];
288 printk(KERN_INFO "sgivwfb: granted dot-clock=%d KHz\n", timing->cfreq);
289
290 /* Adjust virtual resolution, if necessary */
291 if (var->xres > var->xres_virtual || (!ywrap && !ypan))
292 var->xres_virtual = var->xres;
293 if (var->yres > var->yres_virtual || (!ywrap && !ypan))
294 var->yres_virtual = var->yres;
295
296 /*
297 * Memory limit
298 */
299 line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
300 if (line_length * var->yres_virtual > sgivwfb_mem_size)
301 return -ENOMEM; /* Virtual resolution to high */
302
303 info->fix.line_length = line_length;
304
305 switch (var->bits_per_pixel) {
306 case 8:
307 var->red.offset = 0;
308 var->red.length = 8;
309 var->green.offset = 0;
310 var->green.length = 8;
311 var->blue.offset = 0;
312 var->blue.length = 8;
313 var->transp.offset = 0;
314 var->transp.length = 0;
315 break;
316 case 16: /* RGBA 5551 */
317 var->red.offset = 11;
318 var->red.length = 5;
319 var->green.offset = 6;
320 var->green.length = 5;
321 var->blue.offset = 1;
322 var->blue.length = 5;
323 var->transp.offset = 0;
324 var->transp.length = 0;
325 break;
326 case 32: /* RGB 8888 */
327 var->red.offset = 0;
328 var->red.length = 8;
329 var->green.offset = 8;
330 var->green.length = 8;
331 var->blue.offset = 16;
332 var->blue.length = 8;
333 var->transp.offset = 24;
334 var->transp.length = 8;
335 break;
336 }
337 var->red.msb_right = 0;
338 var->green.msb_right = 0;
339 var->blue.msb_right = 0;
340 var->transp.msb_right = 0;
341
342 /* set video timing information */
343 var->pixclock = KHZ2PICOS(timing->cfreq);
344 var->left_margin = timing->htotal - timing->hsync_end;
345 var->right_margin = timing->hsync_start - timing->width;
346 var->upper_margin = timing->vtotal - timing->vsync_end;
347 var->lower_margin = timing->vsync_start - timing->height;
348 var->hsync_len = timing->hsync_end - timing->hsync_start;
349 var->vsync_len = timing->vsync_end - timing->vsync_start;
350
351 /* Ouch. This breaks the rules but timing_num is only important if you
352 * change a video mode */
353 par->timing_num = min_mode;
354
355 printk(KERN_INFO "sgivwfb: new video mode xres=%d yres=%d bpp=%d\n",
356 var->xres, var->yres, var->bits_per_pixel);
357 printk(KERN_INFO " vxres=%d vyres=%d\n", var->xres_virtual,
358 var->yres_virtual);
359 return 0;
360 }
361
362 /*
363 * Setup flatpanel related registers.
364 */
365 static void sgivwfb_setup_flatpanel(struct sgivw_par *par, struct dbe_timing_info *currentTiming)
366 {
367 int fp_wid, fp_hgt, fp_vbs, fp_vbe;
368 u32 outputVal = 0;
369
370 SET_DBE_FIELD(VT_FLAGS, HDRV_INVERT, outputVal,
371 (currentTiming->flags & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1);
372 SET_DBE_FIELD(VT_FLAGS, VDRV_INVERT, outputVal,
373 (currentTiming->flags & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1);
374 DBE_SETREG(vt_flags, outputVal);
375
376 /* Turn on the flat panel */
377 switch (flatpanel_id) {
378 case FLATPANEL_SGI_1600SW:
379 fp_wid = 1600;
380 fp_hgt = 1024;
381 fp_vbs = 0;
382 fp_vbe = 1600;
383 currentTiming->pll_m = 4;
384 currentTiming->pll_n = 1;
385 currentTiming->pll_p = 0;
386 break;
387 default:
388 fp_wid = fp_hgt = fp_vbs = fp_vbe = 0xfff;
389 }
390
391 outputVal = 0;
392 SET_DBE_FIELD(FP_DE, FP_DE_ON, outputVal, fp_vbs);
393 SET_DBE_FIELD(FP_DE, FP_DE_OFF, outputVal, fp_vbe);
394 DBE_SETREG(fp_de, outputVal);
395 outputVal = 0;
396 SET_DBE_FIELD(FP_HDRV, FP_HDRV_OFF, outputVal, fp_wid);
397 DBE_SETREG(fp_hdrv, outputVal);
398 outputVal = 0;
399 SET_DBE_FIELD(FP_VDRV, FP_VDRV_ON, outputVal, 1);
400 SET_DBE_FIELD(FP_VDRV, FP_VDRV_OFF, outputVal, fp_hgt + 1);
401 DBE_SETREG(fp_vdrv, outputVal);
402 }
403
404 /*
405 * Set the hardware according to 'par'.
406 */
407 static int sgivwfb_set_par(struct fb_info *info)
408 {
409 struct sgivw_par *par = info->par;
410 int i, j, htmp, temp;
411 u32 readVal, outputVal;
412 int wholeTilesX, maxPixelsPerTileX;
413 int frmWrite1, frmWrite2, frmWrite3b;
414 struct dbe_timing_info *currentTiming; /* Current Video Timing */
415 int xpmax, ypmax; // Monitor resolution
416 int bytesPerPixel; // Bytes per pixel
417
418 currentTiming = &dbeVTimings[par->timing_num];
419 bytesPerPixel = bytes_per_pixel(info->var.bits_per_pixel);
420 xpmax = currentTiming->width;
421 ypmax = currentTiming->height;
422
423 /* dbe_InitGraphicsBase(); */
424 /* Turn on dotclock PLL */
425 DBE_SETREG(ctrlstat, 0x20000000);
426
427 dbe_TurnOffDma(par);
428
429 /* dbe_CalculateScreenParams(); */
430 maxPixelsPerTileX = 512 / bytesPerPixel;
431 wholeTilesX = xpmax / maxPixelsPerTileX;
432 if (wholeTilesX * maxPixelsPerTileX < xpmax)
433 wholeTilesX++;
434
435 printk(KERN_DEBUG "sgivwfb: pixPerTile=%d wholeTilesX=%d\n",
436 maxPixelsPerTileX, wholeTilesX);
437
438 /* dbe_InitGammaMap(); */
439 udelay(10);
440
441 for (i = 0; i < 256; i++) {
442 DBE_ISETREG(gmap, i, (i << 24) | (i << 16) | (i << 8));
443 }
444
445 /* dbe_TurnOn(); */
446 DBE_GETREG(vt_xy, readVal);
447 if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1) {
448 DBE_SETREG(vt_xy, 0x00000000);
449 udelay(1);
450 } else
451 dbe_TurnOffDma(par);
452
453 /* dbe_Initdbe(); */
454 for (i = 0; i < 256; i++) {
455 for (j = 0; j < 100; j++) {
456 DBE_GETREG(cm_fifo, readVal);
457 if (readVal != 0x00000000)
458 break;
459 else
460 udelay(10);
461 }
462
463 // DBE_ISETREG(cmap, i, 0x00000000);
464 DBE_ISETREG(cmap, i, (i << 8) | (i << 16) | (i << 24));
465 }
466
467 /* dbe_InitFramebuffer(); */
468 frmWrite1 = 0;
469 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_WIDTH_TILE, frmWrite1,
470 wholeTilesX);
471 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_RHS, frmWrite1, 0);
472
473 switch (bytesPerPixel) {
474 case 1:
475 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
476 DBE_FRM_DEPTH_8);
477 break;
478 case 2:
479 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
480 DBE_FRM_DEPTH_16);
481 break;
482 case 4:
483 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1,
484 DBE_FRM_DEPTH_32);
485 break;
486 }
487
488 frmWrite2 = 0;
489 SET_DBE_FIELD(FRM_SIZE_PIXEL, FB_HEIGHT_PIX, frmWrite2, ypmax);
490
491 // Tell dbe about the framebuffer location and type
492 // XXX What format is the FRM_TILE_PTR?? 64K aligned address?
493 frmWrite3b = 0;
494 SET_DBE_FIELD(FRM_CONTROL, FRM_TILE_PTR, frmWrite3b,
495 sgivwfb_mem_phys >> 9);
496 SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, frmWrite3b, 1);
497 SET_DBE_FIELD(FRM_CONTROL, FRM_LINEAR, frmWrite3b, 1);
498
499 /* Initialize DIDs */
500
501 outputVal = 0;
502 switch (bytesPerPixel) {
503 case 1:
504 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_I8);
505 break;
506 case 2:
507 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGBA5);
508 break;
509 case 4:
510 SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGB8);
511 break;
512 }
513 SET_DBE_FIELD(WID, BUF, outputVal, DBE_BMODE_BOTH);
514
515 for (i = 0; i < 32; i++) {
516 DBE_ISETREG(mode_regs, i, outputVal);
517 }
518
519 /* dbe_InitTiming(); */
520 DBE_SETREG(vt_intr01, 0xffffffff);
521 DBE_SETREG(vt_intr23, 0xffffffff);
522
523 DBE_GETREG(dotclock, readVal);
524 DBE_SETREG(dotclock, readVal & 0xffff);
525
526 DBE_SETREG(vt_xymax, 0x00000000);
527 outputVal = 0;
528 SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_ON, outputVal,
529 currentTiming->vsync_start);
530 SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_OFF, outputVal,
531 currentTiming->vsync_end);
532 DBE_SETREG(vt_vsync, outputVal);
533 outputVal = 0;
534 SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_ON, outputVal,
535 currentTiming->hsync_start);
536 SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_OFF, outputVal,
537 currentTiming->hsync_end);
538 DBE_SETREG(vt_hsync, outputVal);
539 outputVal = 0;
540 SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_ON, outputVal,
541 currentTiming->vblank_start);
542 SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_OFF, outputVal,
543 currentTiming->vblank_end);
544 DBE_SETREG(vt_vblank, outputVal);
545 outputVal = 0;
546 SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_ON, outputVal,
547 currentTiming->hblank_start);
548 SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_OFF, outputVal,
549 currentTiming->hblank_end - 3);
550 DBE_SETREG(vt_hblank, outputVal);
551 outputVal = 0;
552 SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_ON, outputVal,
553 currentTiming->vblank_start);
554 SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_OFF, outputVal,
555 currentTiming->vblank_end);
556 DBE_SETREG(vt_vcmap, outputVal);
557 outputVal = 0;
558 SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_ON, outputVal,
559 currentTiming->hblank_start);
560 SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_OFF, outputVal,
561 currentTiming->hblank_end - 3);
562 DBE_SETREG(vt_hcmap, outputVal);
563
564 if (flatpanel_id != -1)
565 sgivwfb_setup_flatpanel(par, currentTiming);
566
567 outputVal = 0;
568 temp = currentTiming->vblank_start - currentTiming->vblank_end - 1;
569 if (temp > 0)
570 temp = -temp;
571
572 SET_DBE_FIELD(DID_START_XY, DID_STARTY, outputVal, (u32) temp);
573 if (currentTiming->hblank_end >= 20)
574 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
575 currentTiming->hblank_end - 20);
576 else
577 SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
578 currentTiming->htotal - (20 -
579 currentTiming->
580 hblank_end));
581 DBE_SETREG(did_start_xy, outputVal);
582
583 outputVal = 0;
584 SET_DBE_FIELD(CRS_START_XY, CRS_STARTY, outputVal,
585 (u32) (temp + 1));
586 if (currentTiming->hblank_end >= DBE_CRS_MAGIC)
587 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
588 currentTiming->hblank_end - DBE_CRS_MAGIC);
589 else
590 SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
591 currentTiming->htotal - (DBE_CRS_MAGIC -
592 currentTiming->
593 hblank_end));
594 DBE_SETREG(crs_start_xy, outputVal);
595
596 outputVal = 0;
597 SET_DBE_FIELD(VC_START_XY, VC_STARTY, outputVal, (u32) temp);
598 SET_DBE_FIELD(VC_START_XY, VC_STARTX, outputVal,
599 currentTiming->hblank_end - 4);
600 DBE_SETREG(vc_start_xy, outputVal);
601
602 DBE_SETREG(frm_size_tile, frmWrite1);
603 DBE_SETREG(frm_size_pixel, frmWrite2);
604
605 outputVal = 0;
606 SET_DBE_FIELD(DOTCLK, M, outputVal, currentTiming->pll_m - 1);
607 SET_DBE_FIELD(DOTCLK, N, outputVal, currentTiming->pll_n - 1);
608 SET_DBE_FIELD(DOTCLK, P, outputVal, currentTiming->pll_p);
609 SET_DBE_FIELD(DOTCLK, RUN, outputVal, 1);
610 DBE_SETREG(dotclock, outputVal);
611
612 udelay(11 * 1000);
613
614 DBE_SETREG(vt_vpixen, 0xffffff);
615 DBE_SETREG(vt_hpixen, 0xffffff);
616
617 outputVal = 0;
618 SET_DBE_FIELD(VT_XYMAX, VT_MAXX, outputVal, currentTiming->htotal);
619 SET_DBE_FIELD(VT_XYMAX, VT_MAXY, outputVal, currentTiming->vtotal);
620 DBE_SETREG(vt_xymax, outputVal);
621
622 outputVal = frmWrite1;
623 SET_DBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, outputVal, 1);
624 DBE_SETREG(frm_size_tile, outputVal);
625 DBE_SETREG(frm_size_tile, frmWrite1);
626
627 outputVal = 0;
628 SET_DBE_FIELD(OVR_WIDTH_TILE, OVR_FIFO_RESET, outputVal, 1);
629 DBE_SETREG(ovr_width_tile, outputVal);
630 DBE_SETREG(ovr_width_tile, 0);
631
632 DBE_SETREG(frm_control, frmWrite3b);
633 DBE_SETREG(did_control, 0);
634
635 // Wait for dbe to take frame settings
636 for (i = 0; i < 100000; i++) {
637 DBE_GETREG(frm_inhwctrl, readVal);
638 if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) !=
639 0)
640 break;
641 else
642 udelay(1);
643 }
644
645 if (i == 100000)
646 printk(KERN_INFO
647 "sgivwfb: timeout waiting for frame DMA enable.\n");
648
649 outputVal = 0;
650 htmp = currentTiming->hblank_end - 19;
651 if (htmp < 0)
652 htmp += currentTiming->htotal; /* allow blank to wrap around */
653 SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_ON, outputVal, htmp);
654 SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_OFF, outputVal,
655 ((htmp + currentTiming->width -
656 2) % currentTiming->htotal));
657 DBE_SETREG(vt_hpixen, outputVal);
658
659 outputVal = 0;
660 SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_OFF, outputVal,
661 currentTiming->vblank_start);
662 SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_ON, outputVal,
663 currentTiming->vblank_end);
664 DBE_SETREG(vt_vpixen, outputVal);
665
666 // Turn off mouse cursor
667 par->regs->crs_ctl = 0;
668
669 // XXX What's this section for??
670 DBE_GETREG(ctrlstat, readVal);
671 readVal &= 0x02000000;
672
673 if (readVal != 0) {
674 DBE_SETREG(ctrlstat, 0x30000000);
675 }
676 return 0;
677 }
678
679 /*
680 * Set a single color register. The values supplied are already
681 * rounded down to the hardware's capabilities (according to the
682 * entries in the var structure). Return != 0 for invalid regno.
683 */
684
685 static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green,
686 u_int blue, u_int transp,
687 struct fb_info *info)
688 {
689 struct sgivw_par *par = (struct sgivw_par *) info->par;
690
691 if (regno > 255)
692 return 1;
693 red >>= 8;
694 green >>= 8;
695 blue >>= 8;
696
697 /* wait for the color map FIFO to have a free entry */
698 while (par->cmap_fifo == 0)
699 par->cmap_fifo = par->regs->cm_fifo;
700
701 par->regs->cmap[regno] = (red << 24) | (green << 16) | (blue << 8);
702 par->cmap_fifo--; /* assume FIFO is filling up */
703 return 0;
704 }
705
706 static int sgivwfb_mmap(struct fb_info *info,
707 struct vm_area_struct *vma)
708 {
709 unsigned long size = vma->vm_end - vma->vm_start;
710 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
711
712 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
713 return -EINVAL;
714 if (offset + size > sgivwfb_mem_size)
715 return -EINVAL;
716 offset += sgivwfb_mem_phys;
717 pgprot_val(vma->vm_page_prot) =
718 pgprot_val(vma->vm_page_prot) | _PAGE_PCD;
719 vma->vm_flags |= VM_IO;
720 if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
721 size, vma->vm_page_prot))
722 return -EAGAIN;
723 printk(KERN_DEBUG "sgivwfb: mmap framebuffer P(%lx)->V(%lx)\n",
724 offset, vma->vm_start);
725 return 0;
726 }
727
728 int __init sgivwfb_setup(char *options)
729 {
730 char *this_opt;
731
732 if (!options || !*options)
733 return 0;
734
735 while ((this_opt = strsep(&options, ",")) != NULL) {
736 if (!strncmp(this_opt, "monitor:", 8)) {
737 if (!strncmp(this_opt + 8, "crt", 3))
738 flatpanel_id = -1;
739 else if (!strncmp(this_opt + 8, "1600sw", 6))
740 flatpanel_id = FLATPANEL_SGI_1600SW;
741 }
742 }
743 return 0;
744 }
745
746 /*
747 * Initialisation
748 */
749 static int __init sgivwfb_probe(struct platform_device *dev)
750 {
751 struct sgivw_par *par;
752 struct fb_info *info;
753 char *monitor;
754
755 info = framebuffer_alloc(sizeof(struct sgivw_par) + sizeof(u32) * 256, &dev->dev);
756 if (!info)
757 return -ENOMEM;
758 par = info->par;
759
760 if (!request_mem_region(DBE_REG_PHYS, DBE_REG_SIZE, "sgivwfb")) {
761 printk(KERN_ERR "sgivwfb: couldn't reserve mmio region\n");
762 framebuffer_release(info);
763 return -EBUSY;
764 }
765
766 par->regs = (struct asregs *) ioremap_nocache(DBE_REG_PHYS, DBE_REG_SIZE);
767 if (!par->regs) {
768 printk(KERN_ERR "sgivwfb: couldn't ioremap registers\n");
769 goto fail_ioremap_regs;
770 }
771
772 mtrr_add(sgivwfb_mem_phys, sgivwfb_mem_size, MTRR_TYPE_WRCOMB, 1);
773
774 sgivwfb_fix.smem_start = sgivwfb_mem_phys;
775 sgivwfb_fix.smem_len = sgivwfb_mem_size;
776 sgivwfb_fix.ywrapstep = ywrap;
777 sgivwfb_fix.ypanstep = ypan;
778
779 info->fix = sgivwfb_fix;
780
781 switch (flatpanel_id) {
782 case FLATPANEL_SGI_1600SW:
783 info->var = sgivwfb_var1600sw;
784 monitor = "SGI 1600SW flatpanel";
785 break;
786 default:
787 info->var = sgivwfb_var;
788 monitor = "CRT";
789 }
790
791 printk(KERN_INFO "sgivwfb: %s monitor selected\n", monitor);
792
793 info->fbops = &sgivwfb_ops;
794 info->pseudo_palette = (void *) (par + 1);
795 info->flags = FBINFO_DEFAULT;
796
797 info->screen_base = ioremap_nocache((unsigned long) sgivwfb_mem_phys, sgivwfb_mem_size);
798 if (!info->screen_base) {
799 printk(KERN_ERR "sgivwfb: couldn't ioremap screen_base\n");
800 goto fail_ioremap_fbmem;
801 }
802
803 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
804 goto fail_color_map;
805
806 if (register_framebuffer(info) < 0) {
807 printk(KERN_ERR "sgivwfb: couldn't register framebuffer\n");
808 goto fail_register_framebuffer;
809 }
810
811 platform_set_drvdata(dev, info);
812
813 printk(KERN_INFO "fb%d: SGI DBE frame buffer device, using %ldK of video memory at %#lx\n",
814 info->node, sgivwfb_mem_size >> 10, sgivwfb_mem_phys);
815 return 0;
816
817 fail_register_framebuffer:
818 fb_dealloc_cmap(&info->cmap);
819 fail_color_map:
820 iounmap((char *) info->screen_base);
821 fail_ioremap_fbmem:
822 iounmap(par->regs);
823 fail_ioremap_regs:
824 release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
825 framebuffer_release(info);
826 return -ENXIO;
827 }
828
829 static int sgivwfb_remove(struct platform_device *dev)
830 {
831 struct fb_info *info = platform_get_drvdata(dev);
832
833 if (info) {
834 struct sgivw_par *par = info->par;
835
836 unregister_framebuffer(info);
837 dbe_TurnOffDma(par);
838 iounmap(par->regs);
839 iounmap(info->screen_base);
840 release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
841 }
842 return 0;
843 }
844
845 static struct platform_driver sgivwfb_driver = {
846 .probe = sgivwfb_probe,
847 .remove = sgivwfb_remove,
848 .driver = {
849 .name = "sgivwfb",
850 },
851 };
852
853 static struct platform_device *sgivwfb_device;
854
855 int __init sgivwfb_init(void)
856 {
857 int ret;
858
859 #ifndef MODULE
860 char *option = NULL;
861
862 if (fb_get_options("sgivwfb", &option))
863 return -ENODEV;
864 sgivwfb_setup(option);
865 #endif
866 ret = platform_driver_register(&sgivwfb_driver);
867 if (!ret) {
868 sgivwfb_device = platform_device_alloc("sgivwfb", 0);
869 if (sgivwfb_device) {
870 ret = platform_device_add(sgivwfb_device);
871 } else
872 ret = -ENOMEM;
873 if (ret) {
874 platform_driver_unregister(&sgivwfb_driver);
875 platform_device_put(sgivwfb_device);
876 }
877 }
878 return ret;
879 }
880
881 module_init(sgivwfb_init);
882
883 #ifdef MODULE
884 MODULE_LICENSE("GPL");
885
886 static void __exit sgivwfb_exit(void)
887 {
888 platform_device_unregister(sgivwfb_device);
889 platform_driver_unregister(&sgivwfb_driver);
890 }
891
892 module_exit(sgivwfb_exit);
893
894 #endif /* MODULE */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree