1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Framebuffer driver for TI OMAP boards
4 *
5 * Copyright (C) 2004 Nokia Corporation
6 * Author: Imre Deak <imre.deak@nokia.com>
7 *
8 * Acknowledgements:
9 * Alex McMains <aam@ridgerun.com> - Original driver
10 * Juha Yrjola <juha.yrjola@nokia.com> - Original driver and improvements
11 * Dirk Behme <dirk.behme@de.bosch.com> - changes for 2.6 kernel API
12 * Texas Instruments - H3 support
13 */
14 #include <linux/platform_device.h>
15 #include <linux/mm.h>
16 #include <linux/slab.h>
17 #include <linux/uaccess.h>
18 #include <linux/module.h>
19 #include <linux/sysfs.h>
20
21 #include <linux/omap-dma.h>
22
23 #include <linux/soc/ti/omap1-soc.h>
24 #include "omapfb.h"
25 #include "lcdc.h"
26
27 #define MODULE_NAME "omapfb"
28
29 static unsigned int def_accel;
30 static unsigned long def_vram[OMAPFB_PLANE_NUM];
31 static unsigned int def_vram_cnt;
32 static unsigned long def_vxres;
33 static unsigned long def_vyres;
34 static unsigned int def_rotate;
35 static unsigned int def_mirror;
36
37 static bool manual_update = IS_BUILTIN(CONFIG_FB_OMAP_MANUAL_UPDATE);
38
39 static struct platform_device *fbdev_pdev;
40 static struct lcd_panel *fbdev_panel;
41 static struct omapfb_device *omapfb_dev;
42
43 struct caps_table_struct {
44 unsigned long flag;
45 const char *name;
46 };
47
48 static const struct caps_table_struct ctrl_caps[] = {
49 { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" },
50 { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" },
51 { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
52 { OMAPFB_CAPS_PLANE_SCALE, "scale plane" },
53 { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
54 { OMAPFB_CAPS_WINDOW_SCALE, "scale window" },
55 { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
56 { OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" },
57 { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" },
58 };
59
60 static const struct caps_table_struct color_caps[] = {
61 { 1 << OMAPFB_COLOR_RGB565, "RGB565", },
62 { 1 << OMAPFB_COLOR_YUV422, "YUV422", },
63 { 1 << OMAPFB_COLOR_YUV420, "YUV420", },
64 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
65 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
66 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
67 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
68 { 1 << OMAPFB_COLOR_RGB444, "RGB444", },
69 { 1 << OMAPFB_COLOR_YUY422, "YUY422", },
70 };
71
omapdss_release(struct device * dev)72 static void omapdss_release(struct device *dev)
73 {
74 }
75
76 /* dummy device for clocks */
77 static struct platform_device omapdss_device = {
78 .name = "omapdss_dss",
79 .id = -1,
80 .dev = {
81 .release = omapdss_release,
82 },
83 };
84
85 /*
86 * ---------------------------------------------------------------------------
87 * LCD panel
88 * ---------------------------------------------------------------------------
89 */
90 extern struct lcd_ctrl hwa742_ctrl;
91
92 static const struct lcd_ctrl *ctrls[] = {
93 &omap1_int_ctrl,
94
95 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
96 &hwa742_ctrl,
97 #endif
98 };
99
100 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
101 extern struct lcd_ctrl_extif omap1_ext_if;
102 #endif
103
omapfb_rqueue_lock(struct omapfb_device * fbdev)104 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
105 {
106 mutex_lock(&fbdev->rqueue_mutex);
107 }
108
omapfb_rqueue_unlock(struct omapfb_device * fbdev)109 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
110 {
111 mutex_unlock(&fbdev->rqueue_mutex);
112 }
113
114 /*
115 * ---------------------------------------------------------------------------
116 * LCD controller and LCD DMA
117 * ---------------------------------------------------------------------------
118 */
119 /*
120 * Allocate resources needed for LCD controller and LCD DMA operations. Video
121 * memory is allocated from system memory according to the virtual display
122 * size, except if a bigger memory size is specified explicitly as a kernel
123 * parameter.
124 */
ctrl_init(struct omapfb_device * fbdev)125 static int ctrl_init(struct omapfb_device *fbdev)
126 {
127 int r;
128 int i;
129
130 /* kernel/module vram parameters override boot tags/board config */
131 if (def_vram_cnt) {
132 for (i = 0; i < def_vram_cnt; i++)
133 fbdev->mem_desc.region[i].size =
134 PAGE_ALIGN(def_vram[i]);
135 fbdev->mem_desc.region_cnt = i;
136 }
137
138 if (!fbdev->mem_desc.region_cnt) {
139 struct lcd_panel *panel = fbdev->panel;
140 int def_size;
141 int bpp = panel->bpp;
142
143 /* 12 bpp is packed in 16 bits */
144 if (bpp == 12)
145 bpp = 16;
146 def_size = def_vxres * def_vyres * bpp / 8;
147 fbdev->mem_desc.region_cnt = 1;
148 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
149 }
150 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
151 if (r < 0) {
152 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
153 r);
154 return r;
155 }
156
157 #ifdef DEBUG
158 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
159 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
160 i,
161 fbdev->mem_desc.region[i].paddr,
162 fbdev->mem_desc.region[i].vaddr,
163 fbdev->mem_desc.region[i].size);
164 }
165 #endif
166 return 0;
167 }
168
ctrl_cleanup(struct omapfb_device * fbdev)169 static void ctrl_cleanup(struct omapfb_device *fbdev)
170 {
171 fbdev->ctrl->cleanup();
172 }
173
174 /* Must be called with fbdev->rqueue_mutex held. */
ctrl_change_mode(struct fb_info * fbi)175 static int ctrl_change_mode(struct fb_info *fbi)
176 {
177 int r;
178 unsigned long offset;
179 struct omapfb_plane_struct *plane = fbi->par;
180 struct omapfb_device *fbdev = plane->fbdev;
181 struct fb_var_screeninfo *var = &fbi->var;
182
183 offset = var->yoffset * fbi->fix.line_length +
184 var->xoffset * var->bits_per_pixel / 8;
185
186 if (fbdev->ctrl->sync)
187 fbdev->ctrl->sync();
188 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
189 offset, var->xres_virtual,
190 plane->info.pos_x, plane->info.pos_y,
191 var->xres, var->yres, plane->color_mode);
192 if (r < 0)
193 return r;
194
195 if (fbdev->ctrl->set_rotate != NULL) {
196 r = fbdev->ctrl->set_rotate(var->rotate);
197 if (r < 0)
198 return r;
199 }
200
201 if (fbdev->ctrl->set_scale != NULL)
202 r = fbdev->ctrl->set_scale(plane->idx,
203 var->xres, var->yres,
204 plane->info.out_width,
205 plane->info.out_height);
206
207 return r;
208 }
209
210 /*
211 * ---------------------------------------------------------------------------
212 * fbdev framework callbacks and the ioctl interface
213 * ---------------------------------------------------------------------------
214 */
215 /* Called each time the omapfb device is opened */
omapfb_open(struct fb_info * info,int user)216 static int omapfb_open(struct fb_info *info, int user)
217 {
218 return 0;
219 }
220
221 static void omapfb_sync(struct fb_info *info);
222
223 /* Called when the omapfb device is closed. We make sure that any pending
224 * gfx DMA operations are ended, before we return. */
omapfb_release(struct fb_info * info,int user)225 static int omapfb_release(struct fb_info *info, int user)
226 {
227 omapfb_sync(info);
228 return 0;
229 }
230
231 /* Store a single color palette entry into a pseudo palette or the hardware
232 * palette if one is available. For now we support only 16bpp and thus store
233 * the entry only to the pseudo palette.
234 */
_setcolreg(struct fb_info * info,u_int regno,u_int red,u_int green,u_int blue,u_int transp,int update_hw_pal)235 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
236 u_int blue, u_int transp, int update_hw_pal)
237 {
238 struct omapfb_plane_struct *plane = info->par;
239 struct omapfb_device *fbdev = plane->fbdev;
240 struct fb_var_screeninfo *var = &info->var;
241 int r = 0;
242
243 switch (plane->color_mode) {
244 case OMAPFB_COLOR_YUV422:
245 case OMAPFB_COLOR_YUV420:
246 case OMAPFB_COLOR_YUY422:
247 r = -EINVAL;
248 break;
249 case OMAPFB_COLOR_CLUT_8BPP:
250 case OMAPFB_COLOR_CLUT_4BPP:
251 case OMAPFB_COLOR_CLUT_2BPP:
252 case OMAPFB_COLOR_CLUT_1BPP:
253 if (fbdev->ctrl->setcolreg)
254 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
255 transp, update_hw_pal);
256 fallthrough;
257 case OMAPFB_COLOR_RGB565:
258 case OMAPFB_COLOR_RGB444:
259 if (r != 0)
260 break;
261
262 if (regno < 16) {
263 u16 pal;
264 pal = ((red >> (16 - var->red.length)) <<
265 var->red.offset) |
266 ((green >> (16 - var->green.length)) <<
267 var->green.offset) |
268 (blue >> (16 - var->blue.length));
269 ((u32 *)(info->pseudo_palette))[regno] = pal;
270 }
271 break;
272 default:
273 BUG();
274 }
275 return r;
276 }
277
omapfb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * info)278 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
279 u_int transp, struct fb_info *info)
280 {
281 return _setcolreg(info, regno, red, green, blue, transp, 1);
282 }
283
omapfb_setcmap(struct fb_cmap * cmap,struct fb_info * info)284 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
285 {
286 int count, index, r;
287 u16 *red, *green, *blue, *transp;
288 u16 trans = 0xffff;
289
290 red = cmap->red;
291 green = cmap->green;
292 blue = cmap->blue;
293 transp = cmap->transp;
294 index = cmap->start;
295
296 for (count = 0; count < cmap->len; count++) {
297 if (transp)
298 trans = *transp++;
299 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
300 count == cmap->len - 1);
301 if (r != 0)
302 return r;
303 }
304
305 return 0;
306 }
307
308 static int omapfb_update_full_screen(struct fb_info *fbi);
309
omapfb_blank(int blank,struct fb_info * fbi)310 static int omapfb_blank(int blank, struct fb_info *fbi)
311 {
312 struct omapfb_plane_struct *plane = fbi->par;
313 struct omapfb_device *fbdev = plane->fbdev;
314 int do_update = 0;
315 int r = 0;
316
317 omapfb_rqueue_lock(fbdev);
318 switch (blank) {
319 case FB_BLANK_UNBLANK:
320 if (fbdev->state == OMAPFB_SUSPENDED) {
321 if (fbdev->ctrl->resume)
322 fbdev->ctrl->resume();
323 if (fbdev->panel->enable)
324 fbdev->panel->enable(fbdev->panel);
325 fbdev->state = OMAPFB_ACTIVE;
326 if (fbdev->ctrl->get_update_mode() ==
327 OMAPFB_MANUAL_UPDATE)
328 do_update = 1;
329 }
330 break;
331 case FB_BLANK_POWERDOWN:
332 if (fbdev->state == OMAPFB_ACTIVE) {
333 if (fbdev->panel->disable)
334 fbdev->panel->disable(fbdev->panel);
335 if (fbdev->ctrl->suspend)
336 fbdev->ctrl->suspend();
337 fbdev->state = OMAPFB_SUSPENDED;
338 }
339 break;
340 default:
341 r = -EINVAL;
342 }
343 omapfb_rqueue_unlock(fbdev);
344
345 if (r == 0 && do_update)
346 r = omapfb_update_full_screen(fbi);
347
348 return r;
349 }
350
omapfb_sync(struct fb_info * fbi)351 static void omapfb_sync(struct fb_info *fbi)
352 {
353 struct omapfb_plane_struct *plane = fbi->par;
354 struct omapfb_device *fbdev = plane->fbdev;
355
356 omapfb_rqueue_lock(fbdev);
357 if (fbdev->ctrl->sync)
358 fbdev->ctrl->sync();
359 omapfb_rqueue_unlock(fbdev);
360 }
361
362 /*
363 * Set fb_info.fix fields and also updates fbdev.
364 * When calling this fb_info.var must be set up already.
365 */
set_fb_fix(struct fb_info * fbi,int from_init)366 static void set_fb_fix(struct fb_info *fbi, int from_init)
367 {
368 struct fb_fix_screeninfo *fix = &fbi->fix;
369 struct fb_var_screeninfo *var = &fbi->var;
370 struct omapfb_plane_struct *plane = fbi->par;
371 struct omapfb_mem_region *rg;
372 int bpp;
373
374 rg = &plane->fbdev->mem_desc.region[plane->idx];
375 fbi->screen_base = rg->vaddr;
376
377 if (!from_init) {
378 mutex_lock(&fbi->mm_lock);
379 fix->smem_start = rg->paddr;
380 fix->smem_len = rg->size;
381 mutex_unlock(&fbi->mm_lock);
382 } else {
383 fix->smem_start = rg->paddr;
384 fix->smem_len = rg->size;
385 }
386
387 fix->type = FB_TYPE_PACKED_PIXELS;
388 bpp = var->bits_per_pixel;
389 if (var->nonstd)
390 fix->visual = FB_VISUAL_PSEUDOCOLOR;
391 else switch (var->bits_per_pixel) {
392 case 16:
393 case 12:
394 fix->visual = FB_VISUAL_TRUECOLOR;
395 /* 12bpp is stored in 16 bits */
396 bpp = 16;
397 break;
398 case 1:
399 case 2:
400 case 4:
401 case 8:
402 fix->visual = FB_VISUAL_PSEUDOCOLOR;
403 break;
404 }
405 fix->accel = FB_ACCEL_OMAP1610;
406 fix->line_length = var->xres_virtual * bpp / 8;
407 }
408
set_color_mode(struct omapfb_plane_struct * plane,struct fb_var_screeninfo * var)409 static int set_color_mode(struct omapfb_plane_struct *plane,
410 struct fb_var_screeninfo *var)
411 {
412 switch (var->nonstd) {
413 case 0:
414 break;
415 case OMAPFB_COLOR_YUV422:
416 var->bits_per_pixel = 16;
417 plane->color_mode = var->nonstd;
418 return 0;
419 case OMAPFB_COLOR_YUV420:
420 var->bits_per_pixel = 12;
421 plane->color_mode = var->nonstd;
422 return 0;
423 case OMAPFB_COLOR_YUY422:
424 var->bits_per_pixel = 16;
425 plane->color_mode = var->nonstd;
426 return 0;
427 default:
428 return -EINVAL;
429 }
430
431 switch (var->bits_per_pixel) {
432 case 1:
433 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
434 return 0;
435 case 2:
436 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
437 return 0;
438 case 4:
439 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
440 return 0;
441 case 8:
442 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
443 return 0;
444 case 12:
445 var->bits_per_pixel = 16;
446 fallthrough;
447 case 16:
448 if (plane->fbdev->panel->bpp == 12)
449 plane->color_mode = OMAPFB_COLOR_RGB444;
450 else
451 plane->color_mode = OMAPFB_COLOR_RGB565;
452 return 0;
453 default:
454 return -EINVAL;
455 }
456 }
457
458 /*
459 * Check the values in var against our capabilities and in case of out of
460 * bound values try to adjust them.
461 */
set_fb_var(struct fb_info * fbi,struct fb_var_screeninfo * var)462 static int set_fb_var(struct fb_info *fbi,
463 struct fb_var_screeninfo *var)
464 {
465 int bpp;
466 unsigned long max_frame_size;
467 unsigned long line_size;
468 int xres_min, xres_max;
469 int yres_min, yres_max;
470 struct omapfb_plane_struct *plane = fbi->par;
471 struct omapfb_device *fbdev = plane->fbdev;
472 struct lcd_panel *panel = fbdev->panel;
473
474 if (set_color_mode(plane, var) < 0)
475 return -EINVAL;
476
477 bpp = var->bits_per_pixel;
478 if (plane->color_mode == OMAPFB_COLOR_RGB444)
479 bpp = 16;
480
481 switch (var->rotate) {
482 case 0:
483 case 180:
484 xres_min = OMAPFB_PLANE_XRES_MIN;
485 xres_max = panel->x_res;
486 yres_min = OMAPFB_PLANE_YRES_MIN;
487 yres_max = panel->y_res;
488 if (cpu_is_omap15xx()) {
489 var->xres = panel->x_res;
490 var->yres = panel->y_res;
491 }
492 break;
493 case 90:
494 case 270:
495 xres_min = OMAPFB_PLANE_YRES_MIN;
496 xres_max = panel->y_res;
497 yres_min = OMAPFB_PLANE_XRES_MIN;
498 yres_max = panel->x_res;
499 if (cpu_is_omap15xx()) {
500 var->xres = panel->y_res;
501 var->yres = panel->x_res;
502 }
503 break;
504 default:
505 return -EINVAL;
506 }
507
508 if (var->xres < xres_min)
509 var->xres = xres_min;
510 if (var->yres < yres_min)
511 var->yres = yres_min;
512 if (var->xres > xres_max)
513 var->xres = xres_max;
514 if (var->yres > yres_max)
515 var->yres = yres_max;
516
517 if (var->xres_virtual < var->xres)
518 var->xres_virtual = var->xres;
519 if (var->yres_virtual < var->yres)
520 var->yres_virtual = var->yres;
521 max_frame_size = fbdev->mem_desc.region[plane->idx].size;
522 line_size = var->xres_virtual * bpp / 8;
523 if (line_size * var->yres_virtual > max_frame_size) {
524 /* Try to keep yres_virtual first */
525 line_size = max_frame_size / var->yres_virtual;
526 var->xres_virtual = line_size * 8 / bpp;
527 if (var->xres_virtual < var->xres) {
528 /* Still doesn't fit. Shrink yres_virtual too */
529 var->xres_virtual = var->xres;
530 line_size = var->xres * bpp / 8;
531 var->yres_virtual = max_frame_size / line_size;
532 }
533 /* Recheck this, as the virtual size changed. */
534 if (var->xres_virtual < var->xres)
535 var->xres = var->xres_virtual;
536 if (var->yres_virtual < var->yres)
537 var->yres = var->yres_virtual;
538 if (var->xres < xres_min || var->yres < yres_min)
539 return -EINVAL;
540 }
541 if (var->xres + var->xoffset > var->xres_virtual)
542 var->xoffset = var->xres_virtual - var->xres;
543 if (var->yres + var->yoffset > var->yres_virtual)
544 var->yoffset = var->yres_virtual - var->yres;
545
546 if (plane->color_mode == OMAPFB_COLOR_RGB444) {
547 var->red.offset = 8;
548 var->red.length = 4;
549 var->red.msb_right = 0;
550 var->green.offset = 4;
551 var->green.length = 4;
552 var->green.msb_right = 0;
553 var->blue.offset = 0;
554 var->blue.length = 4;
555 var->blue.msb_right = 0;
556 } else {
557 var->red.offset = 11;
558 var->red.length = 5;
559 var->red.msb_right = 0;
560 var->green.offset = 5;
561 var->green.length = 6;
562 var->green.msb_right = 0;
563 var->blue.offset = 0;
564 var->blue.length = 5;
565 var->blue.msb_right = 0;
566 }
567
568 var->height = -1;
569 var->width = -1;
570 var->grayscale = 0;
571
572 /* pixclock in ps, the rest in pixclock */
573 var->pixclock = 10000000 / (panel->pixel_clock / 100);
574 var->left_margin = panel->hfp;
575 var->right_margin = panel->hbp;
576 var->upper_margin = panel->vfp;
577 var->lower_margin = panel->vbp;
578 var->hsync_len = panel->hsw;
579 var->vsync_len = panel->vsw;
580
581 /* TODO: get these from panel->config */
582 var->vmode = FB_VMODE_NONINTERLACED;
583 var->sync = 0;
584
585 return 0;
586 }
587
588
589 /*
590 * Set new x,y offsets in the virtual display for the visible area and switch
591 * to the new mode.
592 */
omapfb_pan_display(struct fb_var_screeninfo * var,struct fb_info * fbi)593 static int omapfb_pan_display(struct fb_var_screeninfo *var,
594 struct fb_info *fbi)
595 {
596 struct omapfb_plane_struct *plane = fbi->par;
597 struct omapfb_device *fbdev = plane->fbdev;
598 int r = 0;
599
600 omapfb_rqueue_lock(fbdev);
601 if (var->xoffset != fbi->var.xoffset ||
602 var->yoffset != fbi->var.yoffset) {
603 struct fb_var_screeninfo *new_var = &fbdev->new_var;
604
605 memcpy(new_var, &fbi->var, sizeof(*new_var));
606 new_var->xoffset = var->xoffset;
607 new_var->yoffset = var->yoffset;
608 if (set_fb_var(fbi, new_var))
609 r = -EINVAL;
610 else {
611 memcpy(&fbi->var, new_var, sizeof(*new_var));
612 ctrl_change_mode(fbi);
613 }
614 }
615 omapfb_rqueue_unlock(fbdev);
616
617 return r;
618 }
619
620 /* Set mirror to vertical axis and switch to the new mode. */
omapfb_mirror(struct fb_info * fbi,int mirror)621 static int omapfb_mirror(struct fb_info *fbi, int mirror)
622 {
623 struct omapfb_plane_struct *plane = fbi->par;
624 struct omapfb_device *fbdev = plane->fbdev;
625 int r = 0;
626
627 omapfb_rqueue_lock(fbdev);
628 mirror = mirror ? 1 : 0;
629 if (cpu_is_omap15xx())
630 r = -EINVAL;
631 else if (mirror != plane->info.mirror) {
632 plane->info.mirror = mirror;
633 r = ctrl_change_mode(fbi);
634 }
635 omapfb_rqueue_unlock(fbdev);
636
637 return r;
638 }
639
640 /*
641 * Check values in var, try to adjust them in case of out of bound values if
642 * possible, or return error.
643 */
omapfb_check_var(struct fb_var_screeninfo * var,struct fb_info * fbi)644 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
645 {
646 struct omapfb_plane_struct *plane = fbi->par;
647 struct omapfb_device *fbdev = plane->fbdev;
648 int r;
649
650 omapfb_rqueue_lock(fbdev);
651 if (fbdev->ctrl->sync != NULL)
652 fbdev->ctrl->sync();
653 r = set_fb_var(fbi, var);
654 omapfb_rqueue_unlock(fbdev);
655
656 return r;
657 }
658
659 /*
660 * Switch to a new mode. The parameters for it has been check already by
661 * omapfb_check_var.
662 */
omapfb_set_par(struct fb_info * fbi)663 static int omapfb_set_par(struct fb_info *fbi)
664 {
665 struct omapfb_plane_struct *plane = fbi->par;
666 struct omapfb_device *fbdev = plane->fbdev;
667 int r = 0;
668
669 omapfb_rqueue_lock(fbdev);
670 set_fb_fix(fbi, 0);
671 r = ctrl_change_mode(fbi);
672 omapfb_rqueue_unlock(fbdev);
673
674 return r;
675 }
676
omapfb_update_window_async(struct fb_info * fbi,struct omapfb_update_window * win,void (* callback)(void *),void * callback_data)677 static int omapfb_update_window_async(struct fb_info *fbi,
678 struct omapfb_update_window *win,
679 void (*callback)(void *),
680 void *callback_data)
681 {
682 int xres, yres;
683 struct omapfb_plane_struct *plane = fbi->par;
684 struct omapfb_device *fbdev = plane->fbdev;
685 struct fb_var_screeninfo *var = &fbi->var;
686
687 switch (var->rotate) {
688 case 0:
689 case 180:
690 xres = fbdev->panel->x_res;
691 yres = fbdev->panel->y_res;
692 break;
693 case 90:
694 case 270:
695 xres = fbdev->panel->y_res;
696 yres = fbdev->panel->x_res;
697 break;
698 default:
699 return -EINVAL;
700 }
701
702 if (win->x >= xres || win->y >= yres ||
703 win->out_x > xres || win->out_y > yres)
704 return -EINVAL;
705
706 if (!fbdev->ctrl->update_window ||
707 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
708 return -ENODEV;
709
710 if (win->x + win->width > xres)
711 win->width = xres - win->x;
712 if (win->y + win->height > yres)
713 win->height = yres - win->y;
714 if (win->out_x + win->out_width > xres)
715 win->out_width = xres - win->out_x;
716 if (win->out_y + win->out_height > yres)
717 win->out_height = yres - win->out_y;
718 if (!win->width || !win->height || !win->out_width || !win->out_height)
719 return 0;
720
721 return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
722 }
723
omapfb_update_win(struct fb_info * fbi,struct omapfb_update_window * win)724 static int omapfb_update_win(struct fb_info *fbi,
725 struct omapfb_update_window *win)
726 {
727 struct omapfb_plane_struct *plane = fbi->par;
728 int ret;
729
730 omapfb_rqueue_lock(plane->fbdev);
731 ret = omapfb_update_window_async(fbi, win, NULL, NULL);
732 omapfb_rqueue_unlock(plane->fbdev);
733
734 return ret;
735 }
736
omapfb_update_full_screen(struct fb_info * fbi)737 static int omapfb_update_full_screen(struct fb_info *fbi)
738 {
739 struct omapfb_plane_struct *plane = fbi->par;
740 struct omapfb_device *fbdev = plane->fbdev;
741 struct omapfb_update_window win;
742 int r;
743
744 if (!fbdev->ctrl->update_window ||
745 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
746 return -ENODEV;
747
748 win.x = 0;
749 win.y = 0;
750 win.width = fbi->var.xres;
751 win.height = fbi->var.yres;
752 win.out_x = 0;
753 win.out_y = 0;
754 win.out_width = fbi->var.xres;
755 win.out_height = fbi->var.yres;
756 win.format = 0;
757
758 omapfb_rqueue_lock(fbdev);
759 r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
760 omapfb_rqueue_unlock(fbdev);
761
762 return r;
763 }
764
omapfb_setup_plane(struct fb_info * fbi,struct omapfb_plane_info * pi)765 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
766 {
767 struct omapfb_plane_struct *plane = fbi->par;
768 struct omapfb_device *fbdev = plane->fbdev;
769 struct lcd_panel *panel = fbdev->panel;
770 struct omapfb_plane_info old_info;
771 int r = 0;
772
773 if (pi->pos_x + pi->out_width > panel->x_res ||
774 pi->pos_y + pi->out_height > panel->y_res)
775 return -EINVAL;
776
777 omapfb_rqueue_lock(fbdev);
778 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
779 /*
780 * This plane's memory was freed, can't enable it
781 * until it's reallocated.
782 */
783 r = -EINVAL;
784 goto out;
785 }
786 old_info = plane->info;
787 plane->info = *pi;
788 if (pi->enabled) {
789 r = ctrl_change_mode(fbi);
790 if (r < 0) {
791 plane->info = old_info;
792 goto out;
793 }
794 }
795 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
796 if (r < 0) {
797 plane->info = old_info;
798 goto out;
799 }
800 out:
801 omapfb_rqueue_unlock(fbdev);
802 return r;
803 }
804
omapfb_query_plane(struct fb_info * fbi,struct omapfb_plane_info * pi)805 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
806 {
807 struct omapfb_plane_struct *plane = fbi->par;
808
809 *pi = plane->info;
810 return 0;
811 }
812
omapfb_setup_mem(struct fb_info * fbi,struct omapfb_mem_info * mi)813 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
814 {
815 struct omapfb_plane_struct *plane = fbi->par;
816 struct omapfb_device *fbdev = plane->fbdev;
817 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
818 size_t size;
819 int r = 0;
820
821 if (fbdev->ctrl->setup_mem == NULL)
822 return -ENODEV;
823 if (mi->type != OMAPFB_MEMTYPE_SDRAM)
824 return -EINVAL;
825
826 size = PAGE_ALIGN(mi->size);
827 omapfb_rqueue_lock(fbdev);
828 if (plane->info.enabled) {
829 r = -EBUSY;
830 goto out;
831 }
832 if (rg->size != size || rg->type != mi->type) {
833 struct fb_var_screeninfo *new_var = &fbdev->new_var;
834 unsigned long old_size = rg->size;
835 u8 old_type = rg->type;
836 unsigned long paddr;
837
838 rg->size = size;
839 rg->type = mi->type;
840 /*
841 * size == 0 is a special case, for which we
842 * don't check / adjust the screen parameters.
843 * This isn't a problem since the plane can't
844 * be reenabled unless its size is > 0.
845 */
846 if (old_size != size && size) {
847 if (size) {
848 memcpy(new_var, &fbi->var, sizeof(*new_var));
849 r = set_fb_var(fbi, new_var);
850 if (r < 0)
851 goto out;
852 }
853 }
854
855 if (fbdev->ctrl->sync)
856 fbdev->ctrl->sync();
857 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
858 if (r < 0) {
859 /* Revert changes. */
860 rg->size = old_size;
861 rg->type = old_type;
862 goto out;
863 }
864 rg->paddr = paddr;
865
866 if (old_size != size) {
867 if (size) {
868 memcpy(&fbi->var, new_var, sizeof(fbi->var));
869 set_fb_fix(fbi, 0);
870 } else {
871 /*
872 * Set these explicitly to indicate that the
873 * plane memory is dealloce'd, the other
874 * screen parameters in var / fix are invalid.
875 */
876 mutex_lock(&fbi->mm_lock);
877 fbi->fix.smem_start = 0;
878 fbi->fix.smem_len = 0;
879 mutex_unlock(&fbi->mm_lock);
880 }
881 }
882 }
883 out:
884 omapfb_rqueue_unlock(fbdev);
885
886 return r;
887 }
888
omapfb_query_mem(struct fb_info * fbi,struct omapfb_mem_info * mi)889 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
890 {
891 struct omapfb_plane_struct *plane = fbi->par;
892 struct omapfb_device *fbdev = plane->fbdev;
893 struct omapfb_mem_region *rg;
894
895 rg = &fbdev->mem_desc.region[plane->idx];
896 memset(mi, 0, sizeof(*mi));
897 mi->size = rg->size;
898 mi->type = rg->type;
899
900 return 0;
901 }
902
omapfb_set_color_key(struct omapfb_device * fbdev,struct omapfb_color_key * ck)903 static int omapfb_set_color_key(struct omapfb_device *fbdev,
904 struct omapfb_color_key *ck)
905 {
906 int r;
907
908 if (!fbdev->ctrl->set_color_key)
909 return -ENODEV;
910
911 omapfb_rqueue_lock(fbdev);
912 r = fbdev->ctrl->set_color_key(ck);
913 omapfb_rqueue_unlock(fbdev);
914
915 return r;
916 }
917
omapfb_get_color_key(struct omapfb_device * fbdev,struct omapfb_color_key * ck)918 static int omapfb_get_color_key(struct omapfb_device *fbdev,
919 struct omapfb_color_key *ck)
920 {
921 int r;
922
923 if (!fbdev->ctrl->get_color_key)
924 return -ENODEV;
925
926 omapfb_rqueue_lock(fbdev);
927 r = fbdev->ctrl->get_color_key(ck);
928 omapfb_rqueue_unlock(fbdev);
929
930 return r;
931 }
932
933 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
934 static int notifier_inited;
935
omapfb_init_notifier(void)936 static void omapfb_init_notifier(void)
937 {
938 int i;
939
940 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
941 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
942 }
943
omapfb_register_client(struct omapfb_notifier_block * omapfb_nb,omapfb_notifier_callback_t callback,void * callback_data)944 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
945 omapfb_notifier_callback_t callback,
946 void *callback_data)
947 {
948 int r;
949
950 if ((unsigned)omapfb_nb->plane_idx >= OMAPFB_PLANE_NUM)
951 return -EINVAL;
952
953 if (!notifier_inited) {
954 omapfb_init_notifier();
955 notifier_inited = 1;
956 }
957
958 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
959 unsigned long, void *))callback;
960 omapfb_nb->data = callback_data;
961 r = blocking_notifier_chain_register(
962 &omapfb_client_list[omapfb_nb->plane_idx],
963 &omapfb_nb->nb);
964 if (r)
965 return r;
966 if (omapfb_dev != NULL &&
967 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
968 omapfb_dev->ctrl->bind_client(omapfb_nb);
969 }
970
971 return 0;
972 }
973 EXPORT_SYMBOL(omapfb_register_client);
974
omapfb_unregister_client(struct omapfb_notifier_block * omapfb_nb)975 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
976 {
977 return blocking_notifier_chain_unregister(
978 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
979 }
980 EXPORT_SYMBOL(omapfb_unregister_client);
981
omapfb_notify_clients(struct omapfb_device * fbdev,unsigned long event)982 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
983 {
984 int i;
985
986 if (!notifier_inited)
987 /* no client registered yet */
988 return;
989
990 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
991 blocking_notifier_call_chain(&omapfb_client_list[i], event,
992 fbdev->fb_info[i]);
993 }
994 EXPORT_SYMBOL(omapfb_notify_clients);
995
omapfb_set_update_mode(struct omapfb_device * fbdev,enum omapfb_update_mode mode)996 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
997 enum omapfb_update_mode mode)
998 {
999 int r;
1000
1001 omapfb_rqueue_lock(fbdev);
1002 r = fbdev->ctrl->set_update_mode(mode);
1003 omapfb_rqueue_unlock(fbdev);
1004
1005 return r;
1006 }
1007
omapfb_get_update_mode(struct omapfb_device * fbdev)1008 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1009 {
1010 int r;
1011
1012 omapfb_rqueue_lock(fbdev);
1013 r = fbdev->ctrl->get_update_mode();
1014 omapfb_rqueue_unlock(fbdev);
1015
1016 return r;
1017 }
1018
omapfb_get_caps(struct omapfb_device * fbdev,int plane,struct omapfb_caps * caps)1019 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1020 struct omapfb_caps *caps)
1021 {
1022 memset(caps, 0, sizeof(*caps));
1023 fbdev->ctrl->get_caps(plane, caps);
1024 if (fbdev->panel->get_caps)
1025 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1026 }
1027
1028 /* For lcd testing */
omapfb_write_first_pixel(struct omapfb_device * fbdev,u16 pixval)1029 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1030 {
1031 omapfb_rqueue_lock(fbdev);
1032 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1033 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1034 struct omapfb_update_window win;
1035
1036 memset(&win, 0, sizeof(win));
1037 win.width = 2;
1038 win.height = 2;
1039 win.out_width = 2;
1040 win.out_height = 2;
1041 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1042 }
1043 omapfb_rqueue_unlock(fbdev);
1044 }
1045 EXPORT_SYMBOL(omapfb_write_first_pixel);
1046
1047 /*
1048 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1049 * here to be accessible by user mode code.
1050 */
omapfb_ioctl(struct fb_info * fbi,unsigned int cmd,unsigned long arg)1051 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1052 unsigned long arg)
1053 {
1054 struct omapfb_plane_struct *plane = fbi->par;
1055 struct omapfb_device *fbdev = plane->fbdev;
1056 const struct fb_ops *ops = fbi->fbops;
1057 union {
1058 struct omapfb_update_window update_window;
1059 struct omapfb_plane_info plane_info;
1060 struct omapfb_mem_info mem_info;
1061 struct omapfb_color_key color_key;
1062 enum omapfb_update_mode update_mode;
1063 struct omapfb_caps caps;
1064 unsigned int mirror;
1065 int plane_out;
1066 int enable_plane;
1067 } p;
1068 int r = 0;
1069
1070 BUG_ON(!ops);
1071 switch (cmd) {
1072 case OMAPFB_MIRROR:
1073 if (get_user(p.mirror, (int __user *)arg))
1074 r = -EFAULT;
1075 else
1076 omapfb_mirror(fbi, p.mirror);
1077 break;
1078 case OMAPFB_SYNC_GFX:
1079 omapfb_sync(fbi);
1080 break;
1081 case OMAPFB_VSYNC:
1082 break;
1083 case OMAPFB_SET_UPDATE_MODE:
1084 if (get_user(p.update_mode, (int __user *)arg))
1085 r = -EFAULT;
1086 else
1087 r = omapfb_set_update_mode(fbdev, p.update_mode);
1088 break;
1089 case OMAPFB_GET_UPDATE_MODE:
1090 p.update_mode = omapfb_get_update_mode(fbdev);
1091 if (put_user(p.update_mode,
1092 (enum omapfb_update_mode __user *)arg))
1093 r = -EFAULT;
1094 break;
1095 case OMAPFB_UPDATE_WINDOW_OLD:
1096 if (copy_from_user(&p.update_window, (void __user *)arg,
1097 sizeof(struct omapfb_update_window_old)))
1098 r = -EFAULT;
1099 else {
1100 struct omapfb_update_window *u = &p.update_window;
1101 u->out_x = u->x;
1102 u->out_y = u->y;
1103 u->out_width = u->width;
1104 u->out_height = u->height;
1105 memset(u->reserved, 0, sizeof(u->reserved));
1106 r = omapfb_update_win(fbi, u);
1107 }
1108 break;
1109 case OMAPFB_UPDATE_WINDOW:
1110 if (copy_from_user(&p.update_window, (void __user *)arg,
1111 sizeof(p.update_window)))
1112 r = -EFAULT;
1113 else
1114 r = omapfb_update_win(fbi, &p.update_window);
1115 break;
1116 case OMAPFB_SETUP_PLANE:
1117 if (copy_from_user(&p.plane_info, (void __user *)arg,
1118 sizeof(p.plane_info)))
1119 r = -EFAULT;
1120 else
1121 r = omapfb_setup_plane(fbi, &p.plane_info);
1122 break;
1123 case OMAPFB_QUERY_PLANE:
1124 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1125 break;
1126 if (copy_to_user((void __user *)arg, &p.plane_info,
1127 sizeof(p.plane_info)))
1128 r = -EFAULT;
1129 break;
1130 case OMAPFB_SETUP_MEM:
1131 if (copy_from_user(&p.mem_info, (void __user *)arg,
1132 sizeof(p.mem_info)))
1133 r = -EFAULT;
1134 else
1135 r = omapfb_setup_mem(fbi, &p.mem_info);
1136 break;
1137 case OMAPFB_QUERY_MEM:
1138 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1139 break;
1140 if (copy_to_user((void __user *)arg, &p.mem_info,
1141 sizeof(p.mem_info)))
1142 r = -EFAULT;
1143 break;
1144 case OMAPFB_SET_COLOR_KEY:
1145 if (copy_from_user(&p.color_key, (void __user *)arg,
1146 sizeof(p.color_key)))
1147 r = -EFAULT;
1148 else
1149 r = omapfb_set_color_key(fbdev, &p.color_key);
1150 break;
1151 case OMAPFB_GET_COLOR_KEY:
1152 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1153 break;
1154 if (copy_to_user((void __user *)arg, &p.color_key,
1155 sizeof(p.color_key)))
1156 r = -EFAULT;
1157 break;
1158 case OMAPFB_GET_CAPS:
1159 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1160 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1161 r = -EFAULT;
1162 break;
1163 case OMAPFB_LCD_TEST:
1164 {
1165 int test_num;
1166
1167 if (get_user(test_num, (int __user *)arg)) {
1168 r = -EFAULT;
1169 break;
1170 }
1171 if (!fbdev->panel->run_test) {
1172 r = -EINVAL;
1173 break;
1174 }
1175 r = fbdev->panel->run_test(fbdev->panel, test_num);
1176 break;
1177 }
1178 case OMAPFB_CTRL_TEST:
1179 {
1180 int test_num;
1181
1182 if (get_user(test_num, (int __user *)arg)) {
1183 r = -EFAULT;
1184 break;
1185 }
1186 if (!fbdev->ctrl->run_test) {
1187 r = -EINVAL;
1188 break;
1189 }
1190 r = fbdev->ctrl->run_test(test_num);
1191 break;
1192 }
1193 default:
1194 r = -EINVAL;
1195 }
1196
1197 return r;
1198 }
1199
omapfb_mmap(struct fb_info * info,struct vm_area_struct * vma)1200 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1201 {
1202 struct omapfb_plane_struct *plane = info->par;
1203 struct omapfb_device *fbdev = plane->fbdev;
1204 int r;
1205
1206 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
1207
1208 omapfb_rqueue_lock(fbdev);
1209 r = fbdev->ctrl->mmap(info, vma);
1210 omapfb_rqueue_unlock(fbdev);
1211
1212 return r;
1213 }
1214
1215 /*
1216 * Callback table for the frame buffer framework. Some of these pointers
1217 * will be changed according to the current setting of fb_info->accel_flags.
1218 */
1219 static struct fb_ops omapfb_ops = {
1220 .owner = THIS_MODULE,
1221 FB_DEFAULT_IOMEM_OPS,
1222 .fb_open = omapfb_open,
1223 .fb_release = omapfb_release,
1224 .fb_setcolreg = omapfb_setcolreg,
1225 .fb_setcmap = omapfb_setcmap,
1226 .fb_blank = omapfb_blank,
1227 .fb_ioctl = omapfb_ioctl,
1228 .fb_check_var = omapfb_check_var,
1229 .fb_set_par = omapfb_set_par,
1230 .fb_pan_display = omapfb_pan_display,
1231 };
1232
1233 /*
1234 * ---------------------------------------------------------------------------
1235 * Sysfs interface
1236 * ---------------------------------------------------------------------------
1237 */
1238 /* omapfbX sysfs entries */
omapfb_show_caps_num(struct device * dev,struct device_attribute * attr,char * buf)1239 static ssize_t omapfb_show_caps_num(struct device *dev,
1240 struct device_attribute *attr, char *buf)
1241 {
1242 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1243 int plane;
1244 size_t size;
1245 struct omapfb_caps caps;
1246
1247 plane = 0;
1248 size = 0;
1249 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1250 omapfb_get_caps(fbdev, plane, &caps);
1251 size += scnprintf(&buf[size], PAGE_SIZE - size,
1252 "plane#%d %#010x %#010x %#010x\n",
1253 plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1254 plane++;
1255 }
1256 return size;
1257 }
1258
omapfb_show_caps_text(struct device * dev,struct device_attribute * attr,char * buf)1259 static ssize_t omapfb_show_caps_text(struct device *dev,
1260 struct device_attribute *attr, char *buf)
1261 {
1262 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1263 int i;
1264 struct omapfb_caps caps;
1265 int plane;
1266 size_t size;
1267
1268 plane = 0;
1269 size = 0;
1270 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1271 omapfb_get_caps(fbdev, plane, &caps);
1272 size += scnprintf(&buf[size], PAGE_SIZE - size,
1273 "plane#%d:\n", plane);
1274 for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1275 size < PAGE_SIZE; i++) {
1276 if (ctrl_caps[i].flag & caps.ctrl)
1277 size += scnprintf(&buf[size], PAGE_SIZE - size,
1278 " %s\n", ctrl_caps[i].name);
1279 }
1280 size += scnprintf(&buf[size], PAGE_SIZE - size,
1281 " plane colors:\n");
1282 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1283 size < PAGE_SIZE; i++) {
1284 if (color_caps[i].flag & caps.plane_color)
1285 size += scnprintf(&buf[size], PAGE_SIZE - size,
1286 " %s\n", color_caps[i].name);
1287 }
1288 size += scnprintf(&buf[size], PAGE_SIZE - size,
1289 " window colors:\n");
1290 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1291 size < PAGE_SIZE; i++) {
1292 if (color_caps[i].flag & caps.wnd_color)
1293 size += scnprintf(&buf[size], PAGE_SIZE - size,
1294 " %s\n", color_caps[i].name);
1295 }
1296
1297 plane++;
1298 }
1299 return size;
1300 }
1301
1302 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1303 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1304
1305 /* panel sysfs entries */
omapfb_show_panel_name(struct device * dev,struct device_attribute * attr,char * buf)1306 static ssize_t omapfb_show_panel_name(struct device *dev,
1307 struct device_attribute *attr, char *buf)
1308 {
1309 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1310
1311 return sysfs_emit(buf, "%s\n", fbdev->panel->name);
1312 }
1313
omapfb_show_bklight_level(struct device * dev,struct device_attribute * attr,char * buf)1314 static ssize_t omapfb_show_bklight_level(struct device *dev,
1315 struct device_attribute *attr,
1316 char *buf)
1317 {
1318 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1319 int r;
1320
1321 if (fbdev->panel->get_bklight_level) {
1322 r = sysfs_emit(buf, "%d\n",
1323 fbdev->panel->get_bklight_level(fbdev->panel));
1324 } else
1325 r = -ENODEV;
1326 return r;
1327 }
1328
omapfb_store_bklight_level(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)1329 static ssize_t omapfb_store_bklight_level(struct device *dev,
1330 struct device_attribute *attr,
1331 const char *buf, size_t size)
1332 {
1333 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1334 int r;
1335
1336 if (fbdev->panel->set_bklight_level) {
1337 unsigned int level;
1338
1339 if (sscanf(buf, "%10d", &level) == 1) {
1340 r = fbdev->panel->set_bklight_level(fbdev->panel,
1341 level);
1342 } else
1343 r = -EINVAL;
1344 } else
1345 r = -ENODEV;
1346 return r ? r : size;
1347 }
1348
omapfb_show_bklight_max(struct device * dev,struct device_attribute * attr,char * buf)1349 static ssize_t omapfb_show_bklight_max(struct device *dev,
1350 struct device_attribute *attr, char *buf)
1351 {
1352 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1353 int r;
1354
1355 if (fbdev->panel->get_bklight_level) {
1356 r = sysfs_emit(buf, "%d\n",
1357 fbdev->panel->get_bklight_max(fbdev->panel));
1358 } else
1359 r = -ENODEV;
1360 return r;
1361 }
1362
1363 static struct device_attribute dev_attr_panel_name =
1364 __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1365 static DEVICE_ATTR(backlight_level, 0664,
1366 omapfb_show_bklight_level, omapfb_store_bklight_level);
1367 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1368
1369 static struct attribute *panel_attrs[] = {
1370 &dev_attr_panel_name.attr,
1371 &dev_attr_backlight_level.attr,
1372 &dev_attr_backlight_max.attr,
1373 NULL,
1374 };
1375
1376 static const struct attribute_group panel_attr_grp = {
1377 .name = "panel",
1378 .attrs = panel_attrs,
1379 };
1380
1381 /* ctrl sysfs entries */
omapfb_show_ctrl_name(struct device * dev,struct device_attribute * attr,char * buf)1382 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1383 struct device_attribute *attr, char *buf)
1384 {
1385 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1386
1387 return sysfs_emit(buf, "%s\n", fbdev->ctrl->name);
1388 }
1389
1390 static struct device_attribute dev_attr_ctrl_name =
1391 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1392
1393 static struct attribute *ctrl_attrs[] = {
1394 &dev_attr_ctrl_name.attr,
1395 NULL,
1396 };
1397
1398 static const struct attribute_group ctrl_attr_grp = {
1399 .name = "ctrl",
1400 .attrs = ctrl_attrs,
1401 };
1402
omapfb_register_sysfs(struct omapfb_device * fbdev)1403 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1404 {
1405 int r;
1406
1407 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1408 goto fail0;
1409
1410 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1411 goto fail1;
1412
1413 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1414 goto fail2;
1415
1416 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1417 goto fail3;
1418
1419 return 0;
1420 fail3:
1421 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1422 fail2:
1423 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1424 fail1:
1425 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1426 fail0:
1427 dev_err(fbdev->dev, "unable to register sysfs interface\n");
1428 return r;
1429 }
1430
omapfb_unregister_sysfs(struct omapfb_device * fbdev)1431 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1432 {
1433 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1434 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1435 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1436 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1437 }
1438
1439 /*
1440 * ---------------------------------------------------------------------------
1441 * LDM callbacks
1442 * ---------------------------------------------------------------------------
1443 */
1444 /* Initialize system fb_info object and set the default video mode.
1445 * The frame buffer memory already allocated by lcddma_init
1446 */
fbinfo_init(struct omapfb_device * fbdev,struct fb_info * info)1447 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1448 {
1449 struct fb_var_screeninfo *var = &info->var;
1450 struct fb_fix_screeninfo *fix = &info->fix;
1451 int r = 0;
1452
1453 info->fbops = &omapfb_ops;
1454
1455 strscpy(fix->id, MODULE_NAME, sizeof(fix->id));
1456
1457 info->pseudo_palette = fbdev->pseudo_palette;
1458
1459 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
1460 var->xres = def_vxres;
1461 var->yres = def_vyres;
1462 var->xres_virtual = def_vxres;
1463 var->yres_virtual = def_vyres;
1464 var->rotate = def_rotate;
1465 var->bits_per_pixel = fbdev->panel->bpp;
1466
1467 set_fb_var(info, var);
1468 set_fb_fix(info, 1);
1469
1470 r = fb_alloc_cmap(&info->cmap, 16, 0);
1471 if (r != 0)
1472 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1473
1474 return r;
1475 }
1476
1477 /* Release the fb_info object */
fbinfo_cleanup(struct omapfb_device * fbdev,struct fb_info * fbi)1478 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1479 {
1480 fb_dealloc_cmap(&fbi->cmap);
1481 }
1482
planes_cleanup(struct omapfb_device * fbdev)1483 static void planes_cleanup(struct omapfb_device *fbdev)
1484 {
1485 int i;
1486
1487 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1488 if (fbdev->fb_info[i] == NULL)
1489 break;
1490 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1491 framebuffer_release(fbdev->fb_info[i]);
1492 }
1493 }
1494
planes_init(struct omapfb_device * fbdev)1495 static int planes_init(struct omapfb_device *fbdev)
1496 {
1497 struct fb_info *fbi;
1498 int i;
1499 int r;
1500
1501 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1502 struct omapfb_plane_struct *plane;
1503 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1504 fbdev->dev);
1505 if (fbi == NULL) {
1506 planes_cleanup(fbdev);
1507 return -ENOMEM;
1508 }
1509 plane = fbi->par;
1510 plane->idx = i;
1511 plane->fbdev = fbdev;
1512 plane->info.mirror = def_mirror;
1513 fbdev->fb_info[i] = fbi;
1514
1515 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1516 framebuffer_release(fbi);
1517 planes_cleanup(fbdev);
1518 return r;
1519 }
1520 plane->info.out_width = fbi->var.xres;
1521 plane->info.out_height = fbi->var.yres;
1522 }
1523 return 0;
1524 }
1525
1526 /*
1527 * Free driver resources. Can be called to rollback an aborted initialization
1528 * sequence.
1529 */
omapfb_free_resources(struct omapfb_device * fbdev,int state)1530 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1531 {
1532 int i;
1533
1534 switch (state) {
1535 case OMAPFB_ACTIVE:
1536 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1537 unregister_framebuffer(fbdev->fb_info[i]);
1538 fallthrough;
1539 case 7:
1540 omapfb_unregister_sysfs(fbdev);
1541 fallthrough;
1542 case 6:
1543 if (fbdev->panel->disable)
1544 fbdev->panel->disable(fbdev->panel);
1545 fallthrough;
1546 case 5:
1547 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1548 fallthrough;
1549 case 4:
1550 planes_cleanup(fbdev);
1551 fallthrough;
1552 case 3:
1553 ctrl_cleanup(fbdev);
1554 fallthrough;
1555 case 2:
1556 if (fbdev->panel->cleanup)
1557 fbdev->panel->cleanup(fbdev->panel);
1558 fallthrough;
1559 case 1:
1560 dev_set_drvdata(fbdev->dev, NULL);
1561 kfree(fbdev);
1562 break;
1563 case 0:
1564 /* nothing to free */
1565 break;
1566 default:
1567 BUG();
1568 }
1569 }
1570
omapfb_find_ctrl(struct omapfb_device * fbdev)1571 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1572 {
1573 struct omapfb_platform_data *conf;
1574 char name[17];
1575 int i;
1576
1577 conf = dev_get_platdata(fbdev->dev);
1578
1579 fbdev->ctrl = NULL;
1580
1581 strscpy(name, conf->lcd.ctrl_name, sizeof(name));
1582
1583 if (strcmp(name, "internal") == 0) {
1584 fbdev->ctrl = fbdev->int_ctrl;
1585 return 0;
1586 }
1587
1588 for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1589 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1590 if (strcmp(ctrls[i]->name, name) == 0) {
1591 fbdev->ctrl = ctrls[i];
1592 break;
1593 }
1594 }
1595
1596 if (fbdev->ctrl == NULL) {
1597 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1598 return -1;
1599 }
1600
1601 return 0;
1602 }
1603
1604 /*
1605 * Called by LDM binding to probe and attach a new device.
1606 * Initialization sequence:
1607 * 1. allocate system omapfb_device structure
1608 * 2. select controller type according to platform configuration
1609 * init LCD panel
1610 * 3. init LCD controller and LCD DMA
1611 * 4. init system fb_info structure for all planes
1612 * 5. setup video mode for first plane and enable it
1613 * 6. enable LCD panel
1614 * 7. register sysfs attributes
1615 * OMAPFB_ACTIVE: register system fb_info structure for all planes
1616 */
omapfb_do_probe(struct platform_device * pdev,struct lcd_panel * panel)1617 static int omapfb_do_probe(struct platform_device *pdev,
1618 struct lcd_panel *panel)
1619 {
1620 struct omapfb_device *fbdev = NULL;
1621 int init_state;
1622 unsigned long phz, hhz, vhz;
1623 unsigned long vram;
1624 int i;
1625 int r = 0;
1626
1627 init_state = 0;
1628
1629 if (pdev->num_resources != 2) {
1630 dev_err(&pdev->dev, "probed for an unknown device\n");
1631 r = -ENODEV;
1632 goto cleanup;
1633 }
1634
1635 if (dev_get_platdata(&pdev->dev) == NULL) {
1636 dev_err(&pdev->dev, "missing platform data\n");
1637 r = -ENOENT;
1638 goto cleanup;
1639 }
1640
1641 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
1642 if (fbdev == NULL) {
1643 dev_err(&pdev->dev,
1644 "unable to allocate memory for device info\n");
1645 r = -ENOMEM;
1646 goto cleanup;
1647 }
1648
1649 r = platform_get_irq(pdev, 0);
1650 if (r < 0)
1651 goto cleanup;
1652 fbdev->int_irq = r;
1653
1654 r = platform_get_irq(pdev, 1);
1655 if (r < 0)
1656 goto cleanup;
1657 fbdev->ext_irq = r;
1658
1659 init_state++;
1660
1661 fbdev->dev = &pdev->dev;
1662 fbdev->panel = panel;
1663 fbdev->dssdev = &omapdss_device;
1664 platform_set_drvdata(pdev, fbdev);
1665
1666 mutex_init(&fbdev->rqueue_mutex);
1667
1668 fbdev->int_ctrl = &omap1_int_ctrl;
1669 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1670 fbdev->ext_if = &omap1_ext_if;
1671 #endif
1672 if (omapfb_find_ctrl(fbdev) < 0) {
1673 dev_err(fbdev->dev,
1674 "LCD controller not found, board not supported\n");
1675 r = -ENODEV;
1676 goto cleanup;
1677 }
1678
1679 if (fbdev->panel->init) {
1680 r = fbdev->panel->init(fbdev->panel, fbdev);
1681 if (r)
1682 goto cleanup;
1683 }
1684
1685 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1686
1687 def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
1688 def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
1689
1690 init_state++;
1691
1692 r = ctrl_init(fbdev);
1693 if (r)
1694 goto cleanup;
1695 if (fbdev->ctrl->mmap != NULL)
1696 omapfb_ops.fb_mmap = omapfb_mmap;
1697 init_state++;
1698
1699 r = planes_init(fbdev);
1700 if (r)
1701 goto cleanup;
1702 init_state++;
1703
1704 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1705 /* Set DMA priority for EMIFF access to highest */
1706 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1707 #endif
1708
1709 r = ctrl_change_mode(fbdev->fb_info[0]);
1710 if (r) {
1711 dev_err(fbdev->dev, "mode setting failed\n");
1712 goto cleanup;
1713 }
1714
1715 /* GFX plane is enabled by default */
1716 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1717 if (r)
1718 goto cleanup;
1719
1720 omapfb_set_update_mode(fbdev, manual_update ?
1721 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1722 init_state++;
1723
1724 if (fbdev->panel->enable) {
1725 r = fbdev->panel->enable(fbdev->panel);
1726 if (r)
1727 goto cleanup;
1728 }
1729 init_state++;
1730
1731 r = omapfb_register_sysfs(fbdev);
1732 if (r)
1733 goto cleanup;
1734 init_state++;
1735
1736 vram = 0;
1737 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1738 r = register_framebuffer(fbdev->fb_info[i]);
1739 if (r != 0) {
1740 dev_err(fbdev->dev,
1741 "registering framebuffer %d failed\n", i);
1742 goto cleanup;
1743 }
1744 vram += fbdev->mem_desc.region[i].size;
1745 }
1746
1747 fbdev->state = OMAPFB_ACTIVE;
1748
1749 panel = fbdev->panel;
1750 phz = panel->pixel_clock * 1000;
1751 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1752 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1753
1754 omapfb_dev = fbdev;
1755
1756 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1757 vram, fbdev->mem_desc.region_cnt);
1758 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1759 "vfreq %lu.%lu Hz\n",
1760 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1761
1762 return 0;
1763
1764 cleanup:
1765 omapfb_free_resources(fbdev, init_state);
1766
1767 return r;
1768 }
1769
omapfb_probe(struct platform_device * pdev)1770 static int omapfb_probe(struct platform_device *pdev)
1771 {
1772 int r;
1773
1774 BUG_ON(fbdev_pdev != NULL);
1775
1776 r = platform_device_register(&omapdss_device);
1777 if (r) {
1778 dev_err(&pdev->dev, "can't register omapdss device\n");
1779 return r;
1780 }
1781
1782 /* Delay actual initialization until the LCD is registered */
1783 fbdev_pdev = pdev;
1784 if (fbdev_panel != NULL)
1785 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1786 return 0;
1787 }
1788
omapfb_register_panel(struct lcd_panel * panel)1789 void omapfb_register_panel(struct lcd_panel *panel)
1790 {
1791 BUG_ON(fbdev_panel != NULL);
1792
1793 fbdev_panel = panel;
1794 if (fbdev_pdev != NULL)
1795 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1796 }
1797 EXPORT_SYMBOL_GPL(omapfb_register_panel);
1798
1799 /* Called when the device is being detached from the driver */
omapfb_remove(struct platform_device * pdev)1800 static void omapfb_remove(struct platform_device *pdev)
1801 {
1802 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1803 enum omapfb_state saved_state = fbdev->state;
1804
1805 /* FIXME: wait till completion of pending events */
1806
1807 fbdev->state = OMAPFB_DISABLED;
1808 omapfb_free_resources(fbdev, saved_state);
1809
1810 platform_device_unregister(&omapdss_device);
1811 fbdev->dssdev = NULL;
1812 }
1813
1814 /* PM suspend */
omapfb_suspend(struct platform_device * pdev,pm_message_t mesg)1815 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1816 {
1817 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1818
1819 if (fbdev != NULL)
1820 omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
1821 return 0;
1822 }
1823
1824 /* PM resume */
omapfb_resume(struct platform_device * pdev)1825 static int omapfb_resume(struct platform_device *pdev)
1826 {
1827 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1828
1829 if (fbdev != NULL)
1830 omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
1831 return 0;
1832 }
1833
1834 static struct platform_driver omapfb_driver = {
1835 .probe = omapfb_probe,
1836 .remove_new = omapfb_remove,
1837 .suspend = omapfb_suspend,
1838 .resume = omapfb_resume,
1839 .driver = {
1840 .name = MODULE_NAME,
1841 },
1842 };
1843
1844 #ifndef MODULE
1845
1846 /* Process kernel command line parameters */
omapfb_setup(char * options)1847 static int __init omapfb_setup(char *options)
1848 {
1849 char *this_opt = NULL;
1850 int r = 0;
1851
1852 pr_debug("omapfb: options %s\n", options);
1853
1854 if (!options || !*options)
1855 return 0;
1856
1857 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1858 if (!strncmp(this_opt, "accel", 5))
1859 def_accel = 1;
1860 else if (!strncmp(this_opt, "vram:", 5)) {
1861 unsigned long long vram;
1862 char *suffix;
1863
1864 vram = memparse(this_opt + 5, &suffix);
1865 switch (suffix[0]) {
1866 case '\0':
1867 break;
1868 default:
1869 pr_debug("omapfb: invalid vram suffix %c\n",
1870 suffix[0]);
1871 r = -1;
1872 }
1873 def_vram[def_vram_cnt++] = vram;
1874 }
1875 else if (!strncmp(this_opt, "vxres:", 6))
1876 def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1877 else if (!strncmp(this_opt, "vyres:", 6))
1878 def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1879 else if (!strncmp(this_opt, "rotate:", 7))
1880 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1881 else if (!strncmp(this_opt, "mirror:", 7))
1882 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1883 else if (!strncmp(this_opt, "manual_update", 13))
1884 manual_update = 1;
1885 else {
1886 pr_debug("omapfb: invalid option\n");
1887 r = -1;
1888 }
1889 }
1890
1891 return r;
1892 }
1893
1894 #endif
1895
1896 /* Register both the driver and the device */
omapfb_init(void)1897 static int __init omapfb_init(void)
1898 {
1899 #ifndef MODULE
1900 char *option;
1901
1902 if (fb_get_options("omapfb", &option))
1903 return -ENODEV;
1904 omapfb_setup(option);
1905 #endif
1906 /* Register the driver with LDM */
1907 if (platform_driver_register(&omapfb_driver)) {
1908 pr_debug("failed to register omapfb driver\n");
1909 return -ENODEV;
1910 }
1911
1912 return 0;
1913 }
1914
omapfb_cleanup(void)1915 static void __exit omapfb_cleanup(void)
1916 {
1917 platform_driver_unregister(&omapfb_driver);
1918 }
1919
1920 module_param_named(accel, def_accel, uint, 0664);
1921 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1922 module_param_named(vxres, def_vxres, long, 0664);
1923 module_param_named(vyres, def_vyres, long, 0664);
1924 module_param_named(rotate, def_rotate, uint, 0664);
1925 module_param_named(mirror, def_mirror, uint, 0664);
1926 module_param_named(manual_update, manual_update, bool, 0664);
1927
1928 module_init(omapfb_init);
1929 module_exit(omapfb_cleanup);
1930
1931 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1932 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1933 MODULE_LICENSE("GPL");
1934