1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) Intel Corp. 2007.
4 * All Rights Reserved.
5 *
6 * Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
7 * develop this driver.
8 *
9 * This file is part of the Vermilion Range fb driver.
10 *
11 * Authors:
12 * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
13 * Michel Dänzer <michel-at-tungstengraphics-dot-com>
14 * Alan Hourihane <alanh-at-tungstengraphics-dot-com>
15 */
16
17 #include <linux/aperture.h>
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/string.h>
22 #include <linux/delay.h>
23 #include <linux/slab.h>
24 #include <linux/mm.h>
25 #include <linux/fb.h>
26 #include <linux/pci.h>
27 #include <asm/set_memory.h>
28 #include <asm/tlbflush.h>
29 #include <linux/mmzone.h>
30
31 /* #define VERMILION_DEBUG */
32
33 #include "vermilion.h"
34
35 #define MODULE_NAME "vmlfb"
36
37 #define VML_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
38
39 static struct mutex vml_mutex;
40 static struct list_head global_no_mode;
41 static struct list_head global_has_mode;
42 static struct fb_ops vmlfb_ops;
43 static struct vml_sys *subsys = NULL;
44 static char *vml_default_mode = "1024x768@60";
45 static const struct fb_videomode defaultmode = {
46 NULL, 60, 1024, 768, 12896, 144, 24, 29, 3, 136, 6,
47 0, FB_VMODE_NONINTERLACED
48 };
49
50 static u32 vml_mem_requested = (10 * 1024 * 1024);
51 static u32 vml_mem_contig = (4 * 1024 * 1024);
52 static u32 vml_mem_min = (4 * 1024 * 1024);
53
54 static u32 vml_clocks[] = {
55 6750,
56 13500,
57 27000,
58 29700,
59 37125,
60 54000,
61 59400,
62 74250,
63 120000,
64 148500
65 };
66
67 static u32 vml_num_clocks = ARRAY_SIZE(vml_clocks);
68
69 /*
70 * Allocate a contiguous vram area and make its linear kernel map
71 * uncached.
72 */
73
vmlfb_alloc_vram_area(struct vram_area * va,unsigned max_order,unsigned min_order)74 static int vmlfb_alloc_vram_area(struct vram_area *va, unsigned max_order,
75 unsigned min_order)
76 {
77 gfp_t flags;
78 unsigned long i;
79
80 max_order++;
81 do {
82 /*
83 * Really try hard to get the needed memory.
84 * We need memory below the first 32MB, so we
85 * add the __GFP_DMA flag that guarantees that we are
86 * below the first 16MB.
87 */
88
89 flags = __GFP_DMA | __GFP_HIGH | __GFP_KSWAPD_RECLAIM;
90 va->logical =
91 __get_free_pages(flags, --max_order);
92 } while (va->logical == 0 && max_order > min_order);
93
94 if (!va->logical)
95 return -ENOMEM;
96
97 va->phys = virt_to_phys((void *)va->logical);
98 va->size = PAGE_SIZE << max_order;
99 va->order = max_order;
100
101 /*
102 * It seems like __get_free_pages only ups the usage count
103 * of the first page. This doesn't work with fault mapping, so
104 * up the usage count once more (XXX: should use split_page or
105 * compound page).
106 */
107
108 memset((void *)va->logical, 0x00, va->size);
109 for (i = va->logical; i < va->logical + va->size; i += PAGE_SIZE) {
110 get_page(virt_to_page(i));
111 }
112
113 /*
114 * Change caching policy of the linear kernel map to avoid
115 * mapping type conflicts with user-space mappings.
116 */
117 set_pages_uc(virt_to_page(va->logical), va->size >> PAGE_SHIFT);
118
119 printk(KERN_DEBUG MODULE_NAME
120 ": Allocated %ld bytes vram area at 0x%08lx\n",
121 va->size, va->phys);
122
123 return 0;
124 }
125
126 /*
127 * Free a contiguous vram area and reset its linear kernel map
128 * mapping type.
129 */
130
vmlfb_free_vram_area(struct vram_area * va)131 static void vmlfb_free_vram_area(struct vram_area *va)
132 {
133 unsigned long j;
134
135 if (va->logical) {
136
137 /*
138 * Reset the linear kernel map caching policy.
139 */
140
141 set_pages_wb(virt_to_page(va->logical),
142 va->size >> PAGE_SHIFT);
143
144 /*
145 * Decrease the usage count on the pages we've used
146 * to compensate for upping when allocating.
147 */
148
149 for (j = va->logical; j < va->logical + va->size;
150 j += PAGE_SIZE) {
151 (void)put_page_testzero(virt_to_page(j));
152 }
153
154 printk(KERN_DEBUG MODULE_NAME
155 ": Freeing %ld bytes vram area at 0x%08lx\n",
156 va->size, va->phys);
157 free_pages(va->logical, va->order);
158
159 va->logical = 0;
160 }
161 }
162
163 /*
164 * Free allocated vram.
165 */
166
vmlfb_free_vram(struct vml_info * vinfo)167 static void vmlfb_free_vram(struct vml_info *vinfo)
168 {
169 int i;
170
171 for (i = 0; i < vinfo->num_areas; ++i) {
172 vmlfb_free_vram_area(&vinfo->vram[i]);
173 }
174 vinfo->num_areas = 0;
175 }
176
177 /*
178 * Allocate vram. Currently we try to allocate contiguous areas from the
179 * __GFP_DMA zone and puzzle them together. A better approach would be to
180 * allocate one contiguous area for scanout and use one-page allocations for
181 * offscreen areas. This requires user-space and GPU virtual mappings.
182 */
183
vmlfb_alloc_vram(struct vml_info * vinfo,size_t requested,size_t min_total,size_t min_contig)184 static int vmlfb_alloc_vram(struct vml_info *vinfo,
185 size_t requested,
186 size_t min_total, size_t min_contig)
187 {
188 int i, j;
189 int order;
190 int contiguous;
191 int err;
192 struct vram_area *va;
193 struct vram_area *va2;
194
195 vinfo->num_areas = 0;
196 for (i = 0; i < VML_VRAM_AREAS; ++i) {
197 va = &vinfo->vram[i];
198 order = 0;
199
200 while (requested > (PAGE_SIZE << order) && order <= MAX_ORDER)
201 order++;
202
203 err = vmlfb_alloc_vram_area(va, order, 0);
204
205 if (err)
206 break;
207
208 if (i == 0) {
209 vinfo->vram_start = va->phys;
210 vinfo->vram_logical = (void __iomem *) va->logical;
211 vinfo->vram_contig_size = va->size;
212 vinfo->num_areas = 1;
213 } else {
214 contiguous = 0;
215
216 for (j = 0; j < i; ++j) {
217 va2 = &vinfo->vram[j];
218 if (va->phys + va->size == va2->phys ||
219 va2->phys + va2->size == va->phys) {
220 contiguous = 1;
221 break;
222 }
223 }
224
225 if (contiguous) {
226 vinfo->num_areas++;
227 if (va->phys < vinfo->vram_start) {
228 vinfo->vram_start = va->phys;
229 vinfo->vram_logical =
230 (void __iomem *)va->logical;
231 }
232 vinfo->vram_contig_size += va->size;
233 } else {
234 vmlfb_free_vram_area(va);
235 break;
236 }
237 }
238
239 if (requested < va->size)
240 break;
241 else
242 requested -= va->size;
243 }
244
245 if (vinfo->vram_contig_size > min_total &&
246 vinfo->vram_contig_size > min_contig) {
247
248 printk(KERN_DEBUG MODULE_NAME
249 ": Contiguous vram: %ld bytes at physical 0x%08lx.\n",
250 (unsigned long)vinfo->vram_contig_size,
251 (unsigned long)vinfo->vram_start);
252
253 return 0;
254 }
255
256 printk(KERN_ERR MODULE_NAME
257 ": Could not allocate requested minimal amount of vram.\n");
258
259 vmlfb_free_vram(vinfo);
260
261 return -ENOMEM;
262 }
263
264 /*
265 * Find the GPU to use with our display controller.
266 */
267
vmlfb_get_gpu(struct vml_par * par)268 static int vmlfb_get_gpu(struct vml_par *par)
269 {
270 mutex_lock(&vml_mutex);
271
272 par->gpu = pci_get_device(PCI_VENDOR_ID_INTEL, VML_DEVICE_GPU, NULL);
273
274 if (!par->gpu) {
275 mutex_unlock(&vml_mutex);
276 return -ENODEV;
277 }
278
279 mutex_unlock(&vml_mutex);
280
281 if (pci_enable_device(par->gpu) < 0) {
282 pci_dev_put(par->gpu);
283 return -ENODEV;
284 }
285
286 return 0;
287 }
288
289 /*
290 * Find a contiguous vram area that contains a given offset from vram start.
291 */
vmlfb_vram_offset(struct vml_info * vinfo,unsigned long offset)292 static int vmlfb_vram_offset(struct vml_info *vinfo, unsigned long offset)
293 {
294 unsigned long aoffset;
295 unsigned i;
296
297 for (i = 0; i < vinfo->num_areas; ++i) {
298 aoffset = offset - (vinfo->vram[i].phys - vinfo->vram_start);
299
300 if (aoffset < vinfo->vram[i].size) {
301 return 0;
302 }
303 }
304
305 return -EINVAL;
306 }
307
308 /*
309 * Remap the MMIO register spaces of the VDC and the GPU.
310 */
311
vmlfb_enable_mmio(struct vml_par * par)312 static int vmlfb_enable_mmio(struct vml_par *par)
313 {
314 int err;
315
316 par->vdc_mem_base = pci_resource_start(par->vdc, 0);
317 par->vdc_mem_size = pci_resource_len(par->vdc, 0);
318 if (!request_mem_region(par->vdc_mem_base, par->vdc_mem_size, "vmlfb")) {
319 printk(KERN_ERR MODULE_NAME
320 ": Could not claim display controller MMIO.\n");
321 return -EBUSY;
322 }
323 par->vdc_mem = ioremap(par->vdc_mem_base, par->vdc_mem_size);
324 if (par->vdc_mem == NULL) {
325 printk(KERN_ERR MODULE_NAME
326 ": Could not map display controller MMIO.\n");
327 err = -ENOMEM;
328 goto out_err_0;
329 }
330
331 par->gpu_mem_base = pci_resource_start(par->gpu, 0);
332 par->gpu_mem_size = pci_resource_len(par->gpu, 0);
333 if (!request_mem_region(par->gpu_mem_base, par->gpu_mem_size, "vmlfb")) {
334 printk(KERN_ERR MODULE_NAME ": Could not claim GPU MMIO.\n");
335 err = -EBUSY;
336 goto out_err_1;
337 }
338 par->gpu_mem = ioremap(par->gpu_mem_base, par->gpu_mem_size);
339 if (par->gpu_mem == NULL) {
340 printk(KERN_ERR MODULE_NAME ": Could not map GPU MMIO.\n");
341 err = -ENOMEM;
342 goto out_err_2;
343 }
344
345 return 0;
346
347 out_err_2:
348 release_mem_region(par->gpu_mem_base, par->gpu_mem_size);
349 out_err_1:
350 iounmap(par->vdc_mem);
351 out_err_0:
352 release_mem_region(par->vdc_mem_base, par->vdc_mem_size);
353 return err;
354 }
355
356 /*
357 * Unmap the VDC and GPU register spaces.
358 */
359
vmlfb_disable_mmio(struct vml_par * par)360 static void vmlfb_disable_mmio(struct vml_par *par)
361 {
362 iounmap(par->gpu_mem);
363 release_mem_region(par->gpu_mem_base, par->gpu_mem_size);
364 iounmap(par->vdc_mem);
365 release_mem_region(par->vdc_mem_base, par->vdc_mem_size);
366 }
367
368 /*
369 * Release and uninit the VDC and GPU.
370 */
371
vmlfb_release_devices(struct vml_par * par)372 static void vmlfb_release_devices(struct vml_par *par)
373 {
374 if (atomic_dec_and_test(&par->refcount)) {
375 pci_disable_device(par->gpu);
376 pci_disable_device(par->vdc);
377 }
378 }
379
380 /*
381 * Free up allocated resources for a device.
382 */
383
vml_pci_remove(struct pci_dev * dev)384 static void vml_pci_remove(struct pci_dev *dev)
385 {
386 struct fb_info *info;
387 struct vml_info *vinfo;
388 struct vml_par *par;
389
390 info = pci_get_drvdata(dev);
391 if (info) {
392 vinfo = container_of(info, struct vml_info, info);
393 par = vinfo->par;
394 mutex_lock(&vml_mutex);
395 unregister_framebuffer(info);
396 fb_dealloc_cmap(&info->cmap);
397 vmlfb_free_vram(vinfo);
398 vmlfb_disable_mmio(par);
399 vmlfb_release_devices(par);
400 kfree(vinfo);
401 kfree(par);
402 mutex_unlock(&vml_mutex);
403 }
404 }
405
vmlfb_set_pref_pixel_format(struct fb_var_screeninfo * var)406 static void vmlfb_set_pref_pixel_format(struct fb_var_screeninfo *var)
407 {
408 switch (var->bits_per_pixel) {
409 case 16:
410 var->blue.offset = 0;
411 var->blue.length = 5;
412 var->green.offset = 5;
413 var->green.length = 5;
414 var->red.offset = 10;
415 var->red.length = 5;
416 var->transp.offset = 15;
417 var->transp.length = 1;
418 break;
419 case 32:
420 var->blue.offset = 0;
421 var->blue.length = 8;
422 var->green.offset = 8;
423 var->green.length = 8;
424 var->red.offset = 16;
425 var->red.length = 8;
426 var->transp.offset = 24;
427 var->transp.length = 0;
428 break;
429 default:
430 break;
431 }
432
433 var->blue.msb_right = var->green.msb_right =
434 var->red.msb_right = var->transp.msb_right = 0;
435 }
436
437 /*
438 * Device initialization.
439 * We initialize one vml_par struct per device and one vml_info
440 * struct per pipe. Currently we have only one pipe.
441 */
442
vml_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)443 static int vml_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
444 {
445 struct vml_info *vinfo;
446 struct fb_info *info;
447 struct vml_par *par;
448 int err;
449
450 err = aperture_remove_conflicting_pci_devices(dev, "vmlfb");
451 if (err)
452 return err;
453
454 par = kzalloc(sizeof(*par), GFP_KERNEL);
455 if (par == NULL)
456 return -ENOMEM;
457
458 vinfo = kzalloc(sizeof(*vinfo), GFP_KERNEL);
459 if (vinfo == NULL) {
460 err = -ENOMEM;
461 goto out_err_0;
462 }
463
464 vinfo->par = par;
465 par->vdc = dev;
466 atomic_set(&par->refcount, 1);
467
468 switch (id->device) {
469 case VML_DEVICE_VDC:
470 if ((err = vmlfb_get_gpu(par)))
471 goto out_err_1;
472 pci_set_drvdata(dev, &vinfo->info);
473 break;
474 default:
475 err = -ENODEV;
476 goto out_err_1;
477 }
478
479 info = &vinfo->info;
480 info->flags = FBINFO_PARTIAL_PAN_OK;
481
482 err = vmlfb_enable_mmio(par);
483 if (err)
484 goto out_err_2;
485
486 err = vmlfb_alloc_vram(vinfo, vml_mem_requested,
487 vml_mem_contig, vml_mem_min);
488 if (err)
489 goto out_err_3;
490
491 strcpy(info->fix.id, "Vermilion Range");
492 info->fix.mmio_start = 0;
493 info->fix.mmio_len = 0;
494 info->fix.smem_start = vinfo->vram_start;
495 info->fix.smem_len = vinfo->vram_contig_size;
496 info->fix.type = FB_TYPE_PACKED_PIXELS;
497 info->fix.visual = FB_VISUAL_TRUECOLOR;
498 info->fix.ypanstep = 1;
499 info->fix.xpanstep = 1;
500 info->fix.ywrapstep = 0;
501 info->fix.accel = FB_ACCEL_NONE;
502 info->screen_base = vinfo->vram_logical;
503 info->pseudo_palette = vinfo->pseudo_palette;
504 info->par = par;
505 info->fbops = &vmlfb_ops;
506 info->device = &dev->dev;
507
508 INIT_LIST_HEAD(&vinfo->head);
509 vinfo->pipe_disabled = 1;
510 vinfo->cur_blank_mode = FB_BLANK_UNBLANK;
511
512 info->var.grayscale = 0;
513 info->var.bits_per_pixel = 16;
514 vmlfb_set_pref_pixel_format(&info->var);
515
516 if (!fb_find_mode
517 (&info->var, info, vml_default_mode, NULL, 0, &defaultmode, 16)) {
518 printk(KERN_ERR MODULE_NAME ": Could not find initial mode\n");
519 }
520
521 if (fb_alloc_cmap(&info->cmap, 256, 1) < 0) {
522 err = -ENOMEM;
523 goto out_err_4;
524 }
525
526 err = register_framebuffer(info);
527 if (err) {
528 printk(KERN_ERR MODULE_NAME ": Register framebuffer error.\n");
529 goto out_err_5;
530 }
531
532 printk("Initialized vmlfb\n");
533
534 return 0;
535
536 out_err_5:
537 fb_dealloc_cmap(&info->cmap);
538 out_err_4:
539 vmlfb_free_vram(vinfo);
540 out_err_3:
541 vmlfb_disable_mmio(par);
542 out_err_2:
543 vmlfb_release_devices(par);
544 out_err_1:
545 kfree(vinfo);
546 out_err_0:
547 kfree(par);
548 return err;
549 }
550
vmlfb_open(struct fb_info * info,int user)551 static int vmlfb_open(struct fb_info *info, int user)
552 {
553 /*
554 * Save registers here?
555 */
556 return 0;
557 }
558
vmlfb_release(struct fb_info * info,int user)559 static int vmlfb_release(struct fb_info *info, int user)
560 {
561 /*
562 * Restore registers here.
563 */
564
565 return 0;
566 }
567
vml_nearest_clock(int clock)568 static int vml_nearest_clock(int clock)
569 {
570
571 int i;
572 int cur_index;
573 int cur_diff;
574 int diff;
575
576 cur_index = 0;
577 cur_diff = clock - vml_clocks[0];
578 cur_diff = (cur_diff < 0) ? -cur_diff : cur_diff;
579 for (i = 1; i < vml_num_clocks; ++i) {
580 diff = clock - vml_clocks[i];
581 diff = (diff < 0) ? -diff : diff;
582 if (diff < cur_diff) {
583 cur_index = i;
584 cur_diff = diff;
585 }
586 }
587 return vml_clocks[cur_index];
588 }
589
vmlfb_check_var_locked(struct fb_var_screeninfo * var,struct vml_info * vinfo)590 static int vmlfb_check_var_locked(struct fb_var_screeninfo *var,
591 struct vml_info *vinfo)
592 {
593 u32 pitch;
594 u64 mem;
595 int nearest_clock;
596 int clock;
597 int clock_diff;
598 struct fb_var_screeninfo v;
599
600 v = *var;
601 clock = PICOS2KHZ(var->pixclock);
602
603 if (subsys && subsys->nearest_clock) {
604 nearest_clock = subsys->nearest_clock(subsys, clock);
605 } else {
606 nearest_clock = vml_nearest_clock(clock);
607 }
608
609 /*
610 * Accept a 20% diff.
611 */
612
613 clock_diff = nearest_clock - clock;
614 clock_diff = (clock_diff < 0) ? -clock_diff : clock_diff;
615 if (clock_diff > clock / 5) {
616 #if 0
617 printk(KERN_DEBUG MODULE_NAME ": Diff failure. %d %d\n",clock_diff,clock);
618 #endif
619 return -EINVAL;
620 }
621
622 v.pixclock = KHZ2PICOS(nearest_clock);
623
624 if (var->xres > VML_MAX_XRES || var->yres > VML_MAX_YRES) {
625 printk(KERN_DEBUG MODULE_NAME ": Resolution failure.\n");
626 return -EINVAL;
627 }
628 if (var->xres_virtual > VML_MAX_XRES_VIRTUAL) {
629 printk(KERN_DEBUG MODULE_NAME
630 ": Virtual resolution failure.\n");
631 return -EINVAL;
632 }
633 switch (v.bits_per_pixel) {
634 case 0 ... 16:
635 v.bits_per_pixel = 16;
636 break;
637 case 17 ... 32:
638 v.bits_per_pixel = 32;
639 break;
640 default:
641 printk(KERN_DEBUG MODULE_NAME ": Invalid bpp: %d.\n",
642 var->bits_per_pixel);
643 return -EINVAL;
644 }
645
646 pitch = ALIGN((var->xres * var->bits_per_pixel) >> 3, 0x40);
647 mem = (u64)pitch * var->yres_virtual;
648 if (mem > vinfo->vram_contig_size) {
649 return -ENOMEM;
650 }
651
652 switch (v.bits_per_pixel) {
653 case 16:
654 if (var->blue.offset != 0 ||
655 var->blue.length != 5 ||
656 var->green.offset != 5 ||
657 var->green.length != 5 ||
658 var->red.offset != 10 ||
659 var->red.length != 5 ||
660 var->transp.offset != 15 || var->transp.length != 1) {
661 vmlfb_set_pref_pixel_format(&v);
662 }
663 break;
664 case 32:
665 if (var->blue.offset != 0 ||
666 var->blue.length != 8 ||
667 var->green.offset != 8 ||
668 var->green.length != 8 ||
669 var->red.offset != 16 ||
670 var->red.length != 8 ||
671 (var->transp.length != 0 && var->transp.length != 8) ||
672 (var->transp.length == 8 && var->transp.offset != 24)) {
673 vmlfb_set_pref_pixel_format(&v);
674 }
675 break;
676 default:
677 return -EINVAL;
678 }
679
680 *var = v;
681
682 return 0;
683 }
684
vmlfb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)685 static int vmlfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
686 {
687 struct vml_info *vinfo = container_of(info, struct vml_info, info);
688 int ret;
689
690 mutex_lock(&vml_mutex);
691 ret = vmlfb_check_var_locked(var, vinfo);
692 mutex_unlock(&vml_mutex);
693
694 return ret;
695 }
696
vml_wait_vblank(struct vml_info * vinfo)697 static void vml_wait_vblank(struct vml_info *vinfo)
698 {
699 /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */
700 mdelay(20);
701 }
702
vmlfb_disable_pipe(struct vml_info * vinfo)703 static void vmlfb_disable_pipe(struct vml_info *vinfo)
704 {
705 struct vml_par *par = vinfo->par;
706
707 /* Disable the MDVO pad */
708 VML_WRITE32(par, VML_RCOMPSTAT, 0);
709 while (!(VML_READ32(par, VML_RCOMPSTAT) & VML_MDVO_VDC_I_RCOMP)) ;
710
711 /* Disable display planes */
712 VML_WRITE32(par, VML_DSPCCNTR,
713 VML_READ32(par, VML_DSPCCNTR) & ~VML_GFX_ENABLE);
714 (void)VML_READ32(par, VML_DSPCCNTR);
715 /* Wait for vblank for the disable to take effect */
716 vml_wait_vblank(vinfo);
717
718 /* Next, disable display pipes */
719 VML_WRITE32(par, VML_PIPEACONF, 0);
720 (void)VML_READ32(par, VML_PIPEACONF);
721
722 vinfo->pipe_disabled = 1;
723 }
724
725 #ifdef VERMILION_DEBUG
vml_dump_regs(struct vml_info * vinfo)726 static void vml_dump_regs(struct vml_info *vinfo)
727 {
728 struct vml_par *par = vinfo->par;
729
730 printk(KERN_DEBUG MODULE_NAME ": Modesetting register dump:\n");
731 printk(KERN_DEBUG MODULE_NAME ": \tHTOTAL_A : 0x%08x\n",
732 (unsigned)VML_READ32(par, VML_HTOTAL_A));
733 printk(KERN_DEBUG MODULE_NAME ": \tHBLANK_A : 0x%08x\n",
734 (unsigned)VML_READ32(par, VML_HBLANK_A));
735 printk(KERN_DEBUG MODULE_NAME ": \tHSYNC_A : 0x%08x\n",
736 (unsigned)VML_READ32(par, VML_HSYNC_A));
737 printk(KERN_DEBUG MODULE_NAME ": \tVTOTAL_A : 0x%08x\n",
738 (unsigned)VML_READ32(par, VML_VTOTAL_A));
739 printk(KERN_DEBUG MODULE_NAME ": \tVBLANK_A : 0x%08x\n",
740 (unsigned)VML_READ32(par, VML_VBLANK_A));
741 printk(KERN_DEBUG MODULE_NAME ": \tVSYNC_A : 0x%08x\n",
742 (unsigned)VML_READ32(par, VML_VSYNC_A));
743 printk(KERN_DEBUG MODULE_NAME ": \tDSPCSTRIDE : 0x%08x\n",
744 (unsigned)VML_READ32(par, VML_DSPCSTRIDE));
745 printk(KERN_DEBUG MODULE_NAME ": \tDSPCSIZE : 0x%08x\n",
746 (unsigned)VML_READ32(par, VML_DSPCSIZE));
747 printk(KERN_DEBUG MODULE_NAME ": \tDSPCPOS : 0x%08x\n",
748 (unsigned)VML_READ32(par, VML_DSPCPOS));
749 printk(KERN_DEBUG MODULE_NAME ": \tDSPARB : 0x%08x\n",
750 (unsigned)VML_READ32(par, VML_DSPARB));
751 printk(KERN_DEBUG MODULE_NAME ": \tDSPCADDR : 0x%08x\n",
752 (unsigned)VML_READ32(par, VML_DSPCADDR));
753 printk(KERN_DEBUG MODULE_NAME ": \tBCLRPAT_A : 0x%08x\n",
754 (unsigned)VML_READ32(par, VML_BCLRPAT_A));
755 printk(KERN_DEBUG MODULE_NAME ": \tCANVSCLR_A : 0x%08x\n",
756 (unsigned)VML_READ32(par, VML_CANVSCLR_A));
757 printk(KERN_DEBUG MODULE_NAME ": \tPIPEASRC : 0x%08x\n",
758 (unsigned)VML_READ32(par, VML_PIPEASRC));
759 printk(KERN_DEBUG MODULE_NAME ": \tPIPEACONF : 0x%08x\n",
760 (unsigned)VML_READ32(par, VML_PIPEACONF));
761 printk(KERN_DEBUG MODULE_NAME ": \tDSPCCNTR : 0x%08x\n",
762 (unsigned)VML_READ32(par, VML_DSPCCNTR));
763 printk(KERN_DEBUG MODULE_NAME ": \tRCOMPSTAT : 0x%08x\n",
764 (unsigned)VML_READ32(par, VML_RCOMPSTAT));
765 printk(KERN_DEBUG MODULE_NAME ": End of modesetting register dump.\n");
766 }
767 #endif
768
vmlfb_set_par_locked(struct vml_info * vinfo)769 static int vmlfb_set_par_locked(struct vml_info *vinfo)
770 {
771 struct vml_par *par = vinfo->par;
772 struct fb_info *info = &vinfo->info;
773 struct fb_var_screeninfo *var = &info->var;
774 u32 htotal, hactive, hblank_start, hblank_end, hsync_start, hsync_end;
775 u32 vtotal, vactive, vblank_start, vblank_end, vsync_start, vsync_end;
776 u32 dspcntr;
777 int clock;
778
779 vinfo->bytes_per_pixel = var->bits_per_pixel >> 3;
780 vinfo->stride = ALIGN(var->xres_virtual * vinfo->bytes_per_pixel, 0x40);
781 info->fix.line_length = vinfo->stride;
782
783 if (!subsys)
784 return 0;
785
786 htotal =
787 var->xres + var->right_margin + var->hsync_len + var->left_margin;
788 hactive = var->xres;
789 hblank_start = var->xres;
790 hblank_end = htotal;
791 hsync_start = hactive + var->right_margin;
792 hsync_end = hsync_start + var->hsync_len;
793
794 vtotal =
795 var->yres + var->lower_margin + var->vsync_len + var->upper_margin;
796 vactive = var->yres;
797 vblank_start = var->yres;
798 vblank_end = vtotal;
799 vsync_start = vactive + var->lower_margin;
800 vsync_end = vsync_start + var->vsync_len;
801
802 dspcntr = VML_GFX_ENABLE | VML_GFX_GAMMABYPASS;
803 clock = PICOS2KHZ(var->pixclock);
804
805 if (subsys->nearest_clock) {
806 clock = subsys->nearest_clock(subsys, clock);
807 } else {
808 clock = vml_nearest_clock(clock);
809 }
810 printk(KERN_DEBUG MODULE_NAME
811 ": Set mode Hfreq : %d kHz, Vfreq : %d Hz.\n", clock / htotal,
812 ((clock / htotal) * 1000) / vtotal);
813
814 switch (var->bits_per_pixel) {
815 case 16:
816 dspcntr |= VML_GFX_ARGB1555;
817 break;
818 case 32:
819 if (var->transp.length == 8)
820 dspcntr |= VML_GFX_ARGB8888 | VML_GFX_ALPHAMULT;
821 else
822 dspcntr |= VML_GFX_RGB0888;
823 break;
824 default:
825 return -EINVAL;
826 }
827
828 vmlfb_disable_pipe(vinfo);
829 mb();
830
831 if (subsys->set_clock)
832 subsys->set_clock(subsys, clock);
833 else
834 return -EINVAL;
835
836 VML_WRITE32(par, VML_HTOTAL_A, ((htotal - 1) << 16) | (hactive - 1));
837 VML_WRITE32(par, VML_HBLANK_A,
838 ((hblank_end - 1) << 16) | (hblank_start - 1));
839 VML_WRITE32(par, VML_HSYNC_A,
840 ((hsync_end - 1) << 16) | (hsync_start - 1));
841 VML_WRITE32(par, VML_VTOTAL_A, ((vtotal - 1) << 16) | (vactive - 1));
842 VML_WRITE32(par, VML_VBLANK_A,
843 ((vblank_end - 1) << 16) | (vblank_start - 1));
844 VML_WRITE32(par, VML_VSYNC_A,
845 ((vsync_end - 1) << 16) | (vsync_start - 1));
846 VML_WRITE32(par, VML_DSPCSTRIDE, vinfo->stride);
847 VML_WRITE32(par, VML_DSPCSIZE,
848 ((var->yres - 1) << 16) | (var->xres - 1));
849 VML_WRITE32(par, VML_DSPCPOS, 0x00000000);
850 VML_WRITE32(par, VML_DSPARB, VML_FIFO_DEFAULT);
851 VML_WRITE32(par, VML_BCLRPAT_A, 0x00000000);
852 VML_WRITE32(par, VML_CANVSCLR_A, 0x00000000);
853 VML_WRITE32(par, VML_PIPEASRC,
854 ((var->xres - 1) << 16) | (var->yres - 1));
855
856 wmb();
857 VML_WRITE32(par, VML_PIPEACONF, VML_PIPE_ENABLE);
858 wmb();
859 VML_WRITE32(par, VML_DSPCCNTR, dspcntr);
860 wmb();
861 VML_WRITE32(par, VML_DSPCADDR, (u32) vinfo->vram_start +
862 var->yoffset * vinfo->stride +
863 var->xoffset * vinfo->bytes_per_pixel);
864
865 VML_WRITE32(par, VML_RCOMPSTAT, VML_MDVO_PAD_ENABLE);
866
867 while (!(VML_READ32(par, VML_RCOMPSTAT) &
868 (VML_MDVO_VDC_I_RCOMP | VML_MDVO_PAD_ENABLE))) ;
869
870 vinfo->pipe_disabled = 0;
871 #ifdef VERMILION_DEBUG
872 vml_dump_regs(vinfo);
873 #endif
874
875 return 0;
876 }
877
vmlfb_set_par(struct fb_info * info)878 static int vmlfb_set_par(struct fb_info *info)
879 {
880 struct vml_info *vinfo = container_of(info, struct vml_info, info);
881 int ret;
882
883 mutex_lock(&vml_mutex);
884 list_move(&vinfo->head, (subsys) ? &global_has_mode : &global_no_mode);
885 ret = vmlfb_set_par_locked(vinfo);
886
887 mutex_unlock(&vml_mutex);
888 return ret;
889 }
890
vmlfb_blank_locked(struct vml_info * vinfo)891 static int vmlfb_blank_locked(struct vml_info *vinfo)
892 {
893 struct vml_par *par = vinfo->par;
894 u32 cur = VML_READ32(par, VML_PIPEACONF);
895
896 switch (vinfo->cur_blank_mode) {
897 case FB_BLANK_UNBLANK:
898 if (vinfo->pipe_disabled) {
899 vmlfb_set_par_locked(vinfo);
900 }
901 VML_WRITE32(par, VML_PIPEACONF, cur & ~VML_PIPE_FORCE_BORDER);
902 (void)VML_READ32(par, VML_PIPEACONF);
903 break;
904 case FB_BLANK_NORMAL:
905 if (vinfo->pipe_disabled) {
906 vmlfb_set_par_locked(vinfo);
907 }
908 VML_WRITE32(par, VML_PIPEACONF, cur | VML_PIPE_FORCE_BORDER);
909 (void)VML_READ32(par, VML_PIPEACONF);
910 break;
911 case FB_BLANK_VSYNC_SUSPEND:
912 case FB_BLANK_HSYNC_SUSPEND:
913 if (!vinfo->pipe_disabled) {
914 vmlfb_disable_pipe(vinfo);
915 }
916 break;
917 case FB_BLANK_POWERDOWN:
918 if (!vinfo->pipe_disabled) {
919 vmlfb_disable_pipe(vinfo);
920 }
921 break;
922 default:
923 return -EINVAL;
924 }
925
926 return 0;
927 }
928
vmlfb_blank(int blank_mode,struct fb_info * info)929 static int vmlfb_blank(int blank_mode, struct fb_info *info)
930 {
931 struct vml_info *vinfo = container_of(info, struct vml_info, info);
932 int ret;
933
934 mutex_lock(&vml_mutex);
935 vinfo->cur_blank_mode = blank_mode;
936 ret = vmlfb_blank_locked(vinfo);
937 mutex_unlock(&vml_mutex);
938 return ret;
939 }
940
vmlfb_pan_display(struct fb_var_screeninfo * var,struct fb_info * info)941 static int vmlfb_pan_display(struct fb_var_screeninfo *var,
942 struct fb_info *info)
943 {
944 struct vml_info *vinfo = container_of(info, struct vml_info, info);
945 struct vml_par *par = vinfo->par;
946
947 mutex_lock(&vml_mutex);
948 VML_WRITE32(par, VML_DSPCADDR, (u32) vinfo->vram_start +
949 var->yoffset * vinfo->stride +
950 var->xoffset * vinfo->bytes_per_pixel);
951 (void)VML_READ32(par, VML_DSPCADDR);
952 mutex_unlock(&vml_mutex);
953
954 return 0;
955 }
956
vmlfb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * info)957 static int vmlfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
958 u_int transp, struct fb_info *info)
959 {
960 u32 v;
961
962 if (regno >= 16)
963 return -EINVAL;
964
965 if (info->var.grayscale) {
966 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
967 }
968
969 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
970 return -EINVAL;
971
972 red = VML_TOHW(red, info->var.red.length);
973 blue = VML_TOHW(blue, info->var.blue.length);
974 green = VML_TOHW(green, info->var.green.length);
975 transp = VML_TOHW(transp, info->var.transp.length);
976
977 v = (red << info->var.red.offset) |
978 (green << info->var.green.offset) |
979 (blue << info->var.blue.offset) |
980 (transp << info->var.transp.offset);
981
982 switch (info->var.bits_per_pixel) {
983 case 16:
984 ((u32 *) info->pseudo_palette)[regno] = v;
985 break;
986 case 24:
987 case 32:
988 ((u32 *) info->pseudo_palette)[regno] = v;
989 break;
990 }
991 return 0;
992 }
993
vmlfb_mmap(struct fb_info * info,struct vm_area_struct * vma)994 static int vmlfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
995 {
996 struct vml_info *vinfo = container_of(info, struct vml_info, info);
997 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
998 int ret;
999 unsigned long prot;
1000
1001 ret = vmlfb_vram_offset(vinfo, offset);
1002 if (ret)
1003 return -EINVAL;
1004
1005 prot = pgprot_val(vma->vm_page_prot) & ~_PAGE_CACHE_MASK;
1006 pgprot_val(vma->vm_page_prot) =
1007 prot | cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS);
1008
1009 return vm_iomap_memory(vma, vinfo->vram_start,
1010 vinfo->vram_contig_size);
1011 }
1012
vmlfb_sync(struct fb_info * info)1013 static int vmlfb_sync(struct fb_info *info)
1014 {
1015 return 0;
1016 }
1017
vmlfb_cursor(struct fb_info * info,struct fb_cursor * cursor)1018 static int vmlfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1019 {
1020 return -EINVAL; /* just to force soft_cursor() call */
1021 }
1022
1023 static struct fb_ops vmlfb_ops = {
1024 .owner = THIS_MODULE,
1025 .fb_open = vmlfb_open,
1026 .fb_release = vmlfb_release,
1027 .fb_check_var = vmlfb_check_var,
1028 .fb_set_par = vmlfb_set_par,
1029 .fb_blank = vmlfb_blank,
1030 .fb_pan_display = vmlfb_pan_display,
1031 .fb_fillrect = cfb_fillrect,
1032 .fb_copyarea = cfb_copyarea,
1033 .fb_imageblit = cfb_imageblit,
1034 .fb_cursor = vmlfb_cursor,
1035 .fb_sync = vmlfb_sync,
1036 .fb_mmap = vmlfb_mmap,
1037 .fb_setcolreg = vmlfb_setcolreg
1038 };
1039
1040 static const struct pci_device_id vml_ids[] = {
1041 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, VML_DEVICE_VDC)},
1042 {0}
1043 };
1044
1045 static struct pci_driver vmlfb_pci_driver = {
1046 .name = "vmlfb",
1047 .id_table = vml_ids,
1048 .probe = vml_pci_probe,
1049 .remove = vml_pci_remove,
1050 };
1051
vmlfb_cleanup(void)1052 static void __exit vmlfb_cleanup(void)
1053 {
1054 pci_unregister_driver(&vmlfb_pci_driver);
1055 }
1056
vmlfb_init(void)1057 static int __init vmlfb_init(void)
1058 {
1059
1060 #ifndef MODULE
1061 char *option = NULL;
1062 #endif
1063
1064 if (fb_modesetting_disabled("vmlfb"))
1065 return -ENODEV;
1066
1067 #ifndef MODULE
1068 if (fb_get_options(MODULE_NAME, &option))
1069 return -ENODEV;
1070 #endif
1071
1072 printk(KERN_DEBUG MODULE_NAME ": initializing\n");
1073 mutex_init(&vml_mutex);
1074 INIT_LIST_HEAD(&global_no_mode);
1075 INIT_LIST_HEAD(&global_has_mode);
1076
1077 return pci_register_driver(&vmlfb_pci_driver);
1078 }
1079
vmlfb_register_subsys(struct vml_sys * sys)1080 int vmlfb_register_subsys(struct vml_sys *sys)
1081 {
1082 struct vml_info *entry;
1083 struct list_head *list;
1084 u32 save_activate;
1085
1086 mutex_lock(&vml_mutex);
1087 if (subsys != NULL) {
1088 subsys->restore(subsys);
1089 }
1090 subsys = sys;
1091 subsys->save(subsys);
1092
1093 /*
1094 * We need to restart list traversal for each item, since we
1095 * release the list mutex in the loop.
1096 */
1097
1098 list = global_no_mode.next;
1099 while (list != &global_no_mode) {
1100 list_del_init(list);
1101 entry = list_entry(list, struct vml_info, head);
1102
1103 /*
1104 * First, try the current mode which might not be
1105 * completely validated with respect to the pixel clock.
1106 */
1107
1108 if (!vmlfb_check_var_locked(&entry->info.var, entry)) {
1109 vmlfb_set_par_locked(entry);
1110 list_add_tail(list, &global_has_mode);
1111 } else {
1112
1113 /*
1114 * Didn't work. Try to find another mode,
1115 * that matches this subsys.
1116 */
1117
1118 mutex_unlock(&vml_mutex);
1119 save_activate = entry->info.var.activate;
1120 entry->info.var.bits_per_pixel = 16;
1121 vmlfb_set_pref_pixel_format(&entry->info.var);
1122 if (fb_find_mode(&entry->info.var,
1123 &entry->info,
1124 vml_default_mode, NULL, 0, NULL, 16)) {
1125 entry->info.var.activate |=
1126 FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW;
1127 fb_set_var(&entry->info, &entry->info.var);
1128 } else {
1129 printk(KERN_ERR MODULE_NAME
1130 ": Sorry. no mode found for this subsys.\n");
1131 }
1132 entry->info.var.activate = save_activate;
1133 mutex_lock(&vml_mutex);
1134 }
1135 vmlfb_blank_locked(entry);
1136 list = global_no_mode.next;
1137 }
1138 mutex_unlock(&vml_mutex);
1139
1140 printk(KERN_DEBUG MODULE_NAME ": Registered %s subsystem.\n",
1141 subsys->name ? subsys->name : "unknown");
1142 return 0;
1143 }
1144
1145 EXPORT_SYMBOL_GPL(vmlfb_register_subsys);
1146
vmlfb_unregister_subsys(struct vml_sys * sys)1147 void vmlfb_unregister_subsys(struct vml_sys *sys)
1148 {
1149 struct vml_info *entry, *next;
1150
1151 mutex_lock(&vml_mutex);
1152 if (subsys != sys) {
1153 mutex_unlock(&vml_mutex);
1154 return;
1155 }
1156 subsys->restore(subsys);
1157 subsys = NULL;
1158 list_for_each_entry_safe(entry, next, &global_has_mode, head) {
1159 printk(KERN_DEBUG MODULE_NAME ": subsys disable pipe\n");
1160 vmlfb_disable_pipe(entry);
1161 list_move_tail(&entry->head, &global_no_mode);
1162 }
1163 mutex_unlock(&vml_mutex);
1164 }
1165
1166 EXPORT_SYMBOL_GPL(vmlfb_unregister_subsys);
1167
1168 module_init(vmlfb_init);
1169 module_exit(vmlfb_cleanup);
1170
1171 MODULE_AUTHOR("Tungsten Graphics");
1172 MODULE_DESCRIPTION("Initialization of the Vermilion display devices");
1173 MODULE_VERSION("1.0.0");
1174 MODULE_LICENSE("GPL");
1175