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Merge remote-tracking branch 'pm/linux-next'
[linux-2.6/next.git] / drivers / video / omap / lcdc.c
blob7767338f8b14028fe4ff409eed4717e99296f0ba
1 /*
2 * OMAP1 internal LCD controller
3 *
4 * Copyright (C) 2004 Nokia Corporation
5 * Author: Imre Deak <imre.deak@nokia.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21 #include <linux/module.h>
22 #include <linux/device.h>
23 #include <linux/interrupt.h>
24 #include <linux/spinlock.h>
25 #include <linux/err.h>
26 #include <linux/mm.h>
27 #include <linux/fb.h>
28 #include <linux/dma-mapping.h>
29 #include <linux/vmalloc.h>
30 #include <linux/clk.h>
31 #include <linux/gfp.h>
32
33 #include <mach/lcdc.h>
34 #include <plat/dma.h>
35
36 #include <asm/mach-types.h>
37
38 #include "omapfb.h"
39
40 #include "lcdc.h"
41
42 #define MODULE_NAME "lcdc"
43
44 #define MAX_PALETTE_SIZE PAGE_SIZE
45
46 enum lcdc_load_mode {
47 OMAP_LCDC_LOAD_PALETTE,
48 OMAP_LCDC_LOAD_FRAME,
49 OMAP_LCDC_LOAD_PALETTE_AND_FRAME
50 };
51
52 static struct omap_lcd_controller {
53 enum omapfb_update_mode update_mode;
54 int ext_mode;
55
56 unsigned long frame_offset;
57 int screen_width;
58 int xres;
59 int yres;
60
61 enum omapfb_color_format color_mode;
62 int bpp;
63 void *palette_virt;
64 dma_addr_t palette_phys;
65 int palette_code;
66 int palette_size;
67
68 unsigned int irq_mask;
69 struct completion last_frame_complete;
70 struct completion palette_load_complete;
71 struct clk *lcd_ck;
72 struct omapfb_device *fbdev;
73
74 void (*dma_callback)(void *data);
75 void *dma_callback_data;
76
77 int fbmem_allocated;
78 dma_addr_t vram_phys;
79 void *vram_virt;
80 unsigned long vram_size;
81 } lcdc;
82
83 static void inline enable_irqs(int mask)
84 {
85 lcdc.irq_mask |= mask;
86 }
87
88 static void inline disable_irqs(int mask)
89 {
90 lcdc.irq_mask &= ~mask;
91 }
92
93 static void set_load_mode(enum lcdc_load_mode mode)
94 {
95 u32 l;
96
97 l = omap_readl(OMAP_LCDC_CONTROL);
98 l &= ~(3 << 20);
99 switch (mode) {
100 case OMAP_LCDC_LOAD_PALETTE:
101 l |= 1 << 20;
102 break;
103 case OMAP_LCDC_LOAD_FRAME:
104 l |= 2 << 20;
105 break;
106 case OMAP_LCDC_LOAD_PALETTE_AND_FRAME:
107 break;
108 default:
109 BUG();
110 }
111 omap_writel(l, OMAP_LCDC_CONTROL);
112 }
113
114 static void enable_controller(void)
115 {
116 u32 l;
117
118 l = omap_readl(OMAP_LCDC_CONTROL);
119 l |= OMAP_LCDC_CTRL_LCD_EN;
120 l &= ~OMAP_LCDC_IRQ_MASK;
121 l |= lcdc.irq_mask | OMAP_LCDC_IRQ_DONE; /* enabled IRQs */
122 omap_writel(l, OMAP_LCDC_CONTROL);
123 }
124
125 static void disable_controller_async(void)
126 {
127 u32 l;
128 u32 mask;
129
130 l = omap_readl(OMAP_LCDC_CONTROL);
131 mask = OMAP_LCDC_CTRL_LCD_EN | OMAP_LCDC_IRQ_MASK;
132 /*
133 * Preserve the DONE mask, since we still want to get the
134 * final DONE irq. It will be disabled in the IRQ handler.
135 */
136 mask &= ~OMAP_LCDC_IRQ_DONE;
137 l &= ~mask;
138 omap_writel(l, OMAP_LCDC_CONTROL);
139 }
140
141 static void disable_controller(void)
142 {
143 init_completion(&lcdc.last_frame_complete);
144 disable_controller_async();
145 if (!wait_for_completion_timeout(&lcdc.last_frame_complete,
146 msecs_to_jiffies(500)))
147 dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n");
148 }
149
150 static void reset_controller(u32 status)
151 {
152 static unsigned long reset_count;
153 static unsigned long last_jiffies;
154
155 disable_controller_async();
156 reset_count++;
157 if (reset_count == 1 || time_after(jiffies, last_jiffies + HZ)) {
158 dev_err(lcdc.fbdev->dev,
159 "resetting (status %#010x,reset count %lu)\n",
160 status, reset_count);
161 last_jiffies = jiffies;
162 }
163 if (reset_count < 100) {
164 enable_controller();
165 } else {
166 reset_count = 0;
167 dev_err(lcdc.fbdev->dev,
168 "too many reset attempts, giving up.\n");
169 }
170 }
171
172 /*
173 * Configure the LCD DMA according to the current mode specified by parameters
174 * in lcdc.fbdev and fbdev->var.
175 */
176 static void setup_lcd_dma(void)
177 {
178 static const int dma_elem_type[] = {
179 0,
180 OMAP_DMA_DATA_TYPE_S8,
181 OMAP_DMA_DATA_TYPE_S16,
182 0,
183 OMAP_DMA_DATA_TYPE_S32,
184 };
185 struct omapfb_plane_struct *plane = lcdc.fbdev->fb_info[0]->par;
186 struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var;
187 unsigned long src;
188 int esize, xelem, yelem;
189
190 src = lcdc.vram_phys + lcdc.frame_offset;
191
192 switch (var->rotate) {
193 case 0:
194 if (plane->info.mirror || (src & 3) ||
195 lcdc.color_mode == OMAPFB_COLOR_YUV420 ||
196 (lcdc.xres & 1))
197 esize = 2;
198 else
199 esize = 4;
200 xelem = lcdc.xres * lcdc.bpp / 8 / esize;
201 yelem = lcdc.yres;
202 break;
203 case 90:
204 case 180:
205 case 270:
206 if (cpu_is_omap15xx()) {
207 BUG();
208 }
209 esize = 2;
210 xelem = lcdc.yres * lcdc.bpp / 16;
211 yelem = lcdc.xres;
212 break;
213 default:
214 BUG();
215 return;
216 }
217 #ifdef VERBOSE
218 dev_dbg(lcdc.fbdev->dev,
219 "setup_dma: src %#010lx esize %d xelem %d yelem %d\n",
220 src, esize, xelem, yelem);
221 #endif
222 omap_set_lcd_dma_b1(src, xelem, yelem, dma_elem_type[esize]);
223 if (!cpu_is_omap15xx()) {
224 int bpp = lcdc.bpp;
225
226 /*
227 * YUV support is only for external mode when we have the
228 * YUV window embedded in a 16bpp frame buffer.
229 */
230 if (lcdc.color_mode == OMAPFB_COLOR_YUV420)
231 bpp = 16;
232 /* Set virtual xres elem size */
233 omap_set_lcd_dma_b1_vxres(
234 lcdc.screen_width * bpp / 8 / esize);
235 /* Setup transformations */
236 omap_set_lcd_dma_b1_rotation(var->rotate);
237 omap_set_lcd_dma_b1_mirror(plane->info.mirror);
238 }
239 omap_setup_lcd_dma();
240 }
241
242 static irqreturn_t lcdc_irq_handler(int irq, void *dev_id)
243 {
244 u32 status;
245
246 status = omap_readl(OMAP_LCDC_STATUS);
247
248 if (status & (OMAP_LCDC_STAT_FUF | OMAP_LCDC_STAT_SYNC_LOST))
249 reset_controller(status);
250 else {
251 if (status & OMAP_LCDC_STAT_DONE) {
252 u32 l;
253
254 /*
255 * Disable IRQ_DONE. The status bit will be cleared
256 * only when the controller is reenabled and we don't
257 * want to get more interrupts.
258 */
259 l = omap_readl(OMAP_LCDC_CONTROL);
260 l &= ~OMAP_LCDC_IRQ_DONE;
261 omap_writel(l, OMAP_LCDC_CONTROL);
262 complete(&lcdc.last_frame_complete);
263 }
264 if (status & OMAP_LCDC_STAT_LOADED_PALETTE) {
265 disable_controller_async();
266 complete(&lcdc.palette_load_complete);
267 }
268 }
269
270 /*
271 * Clear these interrupt status bits.
272 * Sync_lost, FUF bits were cleared by disabling the LCD controller
273 * LOADED_PALETTE can be cleared this way only in palette only
274 * load mode. In other load modes it's cleared by disabling the
275 * controller.
276 */
277 status &= ~(OMAP_LCDC_STAT_VSYNC |
278 OMAP_LCDC_STAT_LOADED_PALETTE |
279 OMAP_LCDC_STAT_ABC |
280 OMAP_LCDC_STAT_LINE_INT);
281 omap_writel(status, OMAP_LCDC_STATUS);
282 return IRQ_HANDLED;
283 }
284
285 /*
286 * Change to a new video mode. We defer this to a later time to avoid any
287 * flicker and not to mess up the current LCD DMA context. For this we disable
288 * the LCD controller, which will generate a DONE irq after the last frame has
289 * been transferred. Then it'll be safe to reconfigure both the LCD controller
290 * as well as the LCD DMA.
291 */
292 static int omap_lcdc_setup_plane(int plane, int channel_out,
293 unsigned long offset, int screen_width,
294 int pos_x, int pos_y, int width, int height,
295 int color_mode)
296 {
297 struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var;
298 struct lcd_panel *panel = lcdc.fbdev->panel;
299 int rot_x, rot_y;
300
301 if (var->rotate == 0) {
302 rot_x = panel->x_res;
303 rot_y = panel->y_res;
304 } else {
305 rot_x = panel->y_res;
306 rot_y = panel->x_res;
307 }
308 if (plane != 0 || channel_out != 0 || pos_x != 0 || pos_y != 0 ||
309 width > rot_x || height > rot_y) {
310 #ifdef VERBOSE
311 dev_dbg(lcdc.fbdev->dev,
312 "invalid plane params plane %d pos_x %d pos_y %d "
313 "w %d h %d\n", plane, pos_x, pos_y, width, height);
314 #endif
315 return -EINVAL;
316 }
317
318 lcdc.frame_offset = offset;
319 lcdc.xres = width;
320 lcdc.yres = height;
321 lcdc.screen_width = screen_width;
322 lcdc.color_mode = color_mode;
323
324 switch (color_mode) {
325 case OMAPFB_COLOR_CLUT_8BPP:
326 lcdc.bpp = 8;
327 lcdc.palette_code = 0x3000;
328 lcdc.palette_size = 512;
329 break;
330 case OMAPFB_COLOR_RGB565:
331 lcdc.bpp = 16;
332 lcdc.palette_code = 0x4000;
333 lcdc.palette_size = 32;
334 break;
335 case OMAPFB_COLOR_RGB444:
336 lcdc.bpp = 16;
337 lcdc.palette_code = 0x4000;
338 lcdc.palette_size = 32;
339 break;
340 case OMAPFB_COLOR_YUV420:
341 if (lcdc.ext_mode) {
342 lcdc.bpp = 12;
343 break;
344 }
345 /* fallthrough */
346 case OMAPFB_COLOR_YUV422:
347 if (lcdc.ext_mode) {
348 lcdc.bpp = 16;
349 break;
350 }
351 /* fallthrough */
352 default:
353 /* FIXME: other BPPs.
354 * bpp1: code 0, size 256
355 * bpp2: code 0x1000 size 256
356 * bpp4: code 0x2000 size 256
357 * bpp12: code 0x4000 size 32
358 */
359 dev_dbg(lcdc.fbdev->dev, "invalid color mode %d\n", color_mode);
360 BUG();
361 return -1;
362 }
363
364 if (lcdc.ext_mode) {
365 setup_lcd_dma();
366 return 0;
367 }
368
369 if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) {
370 disable_controller();
371 omap_stop_lcd_dma();
372 setup_lcd_dma();
373 enable_controller();
374 }
375
376 return 0;
377 }
378
379 static int omap_lcdc_enable_plane(int plane, int enable)
380 {
381 dev_dbg(lcdc.fbdev->dev,
382 "plane %d enable %d update_mode %d ext_mode %d\n",
383 plane, enable, lcdc.update_mode, lcdc.ext_mode);
384 if (plane != OMAPFB_PLANE_GFX)
385 return -EINVAL;
386
387 return 0;
388 }
389
390 /*
391 * Configure the LCD DMA for a palette load operation and do the palette
392 * downloading synchronously. We don't use the frame+palette load mode of
393 * the controller, since the palette can always be downloaded separately.
394 */
395 static void load_palette(void)
396 {
397 u16 *palette;
398
399 palette = (u16 *)lcdc.palette_virt;
400
401 *(u16 *)palette &= 0x0fff;
402 *(u16 *)palette |= lcdc.palette_code;
403
404 omap_set_lcd_dma_b1(lcdc.palette_phys,
405 lcdc.palette_size / 4 + 1, 1, OMAP_DMA_DATA_TYPE_S32);
406
407 omap_set_lcd_dma_single_transfer(1);
408 omap_setup_lcd_dma();
409
410 init_completion(&lcdc.palette_load_complete);
411 enable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE);
412 set_load_mode(OMAP_LCDC_LOAD_PALETTE);
413 enable_controller();
414 if (!wait_for_completion_timeout(&lcdc.palette_load_complete,
415 msecs_to_jiffies(500)))
416 dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n");
417 /* The controller gets disabled in the irq handler */
418 disable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE);
419 omap_stop_lcd_dma();
420
421 omap_set_lcd_dma_single_transfer(lcdc.ext_mode);
422 }
423
424 /* Used only in internal controller mode */
425 static int omap_lcdc_setcolreg(u_int regno, u16 red, u16 green, u16 blue,
426 u16 transp, int update_hw_pal)
427 {
428 u16 *palette;
429
430 if (lcdc.color_mode != OMAPFB_COLOR_CLUT_8BPP || regno > 255)
431 return -EINVAL;
432
433 palette = (u16 *)lcdc.palette_virt;
434
435 palette[regno] &= ~0x0fff;
436 palette[regno] |= ((red >> 12) << 8) | ((green >> 12) << 4 ) |
437 (blue >> 12);
438
439 if (update_hw_pal) {
440 disable_controller();
441 omap_stop_lcd_dma();
442 load_palette();
443 setup_lcd_dma();
444 set_load_mode(OMAP_LCDC_LOAD_FRAME);
445 enable_controller();
446 }
447
448 return 0;
449 }
450
451 static void calc_ck_div(int is_tft, int pck, int *pck_div)
452 {
453 unsigned long lck;
454
455 pck = max(1, pck);
456 lck = clk_get_rate(lcdc.lcd_ck);
457 *pck_div = (lck + pck - 1) / pck;
458 if (is_tft)
459 *pck_div = max(2, *pck_div);
460 else
461 *pck_div = max(3, *pck_div);
462 if (*pck_div > 255) {
463 /* FIXME: try to adjust logic clock divider as well */
464 *pck_div = 255;
465 dev_warn(lcdc.fbdev->dev, "pixclock %d kHz too low.\n",
466 pck / 1000);
467 }
468 }
469
470 static void inline setup_regs(void)
471 {
472 u32 l;
473 struct lcd_panel *panel = lcdc.fbdev->panel;
474 int is_tft = panel->config & OMAP_LCDC_PANEL_TFT;
475 unsigned long lck;
476 int pcd;
477
478 l = omap_readl(OMAP_LCDC_CONTROL);
479 l &= ~OMAP_LCDC_CTRL_LCD_TFT;
480 l |= is_tft ? OMAP_LCDC_CTRL_LCD_TFT : 0;
481 #ifdef CONFIG_MACH_OMAP_PALMTE
482 /* FIXME:if (machine_is_omap_palmte()) { */
483 /* PalmTE uses alternate TFT setting in 8BPP mode */
484 l |= (is_tft && panel->bpp == 8) ? 0x810000 : 0;
485 /* } */
486 #endif
487 omap_writel(l, OMAP_LCDC_CONTROL);
488
489 l = omap_readl(OMAP_LCDC_TIMING2);
490 l &= ~(((1 << 6) - 1) << 20);
491 l |= (panel->config & OMAP_LCDC_SIGNAL_MASK) << 20;
492 omap_writel(l, OMAP_LCDC_TIMING2);
493
494 l = panel->x_res - 1;
495 l |= (panel->hsw - 1) << 10;
496 l |= (panel->hfp - 1) << 16;
497 l |= (panel->hbp - 1) << 24;
498 omap_writel(l, OMAP_LCDC_TIMING0);
499
500 l = panel->y_res - 1;
501 l |= (panel->vsw - 1) << 10;
502 l |= panel->vfp << 16;
503 l |= panel->vbp << 24;
504 omap_writel(l, OMAP_LCDC_TIMING1);
505
506 l = omap_readl(OMAP_LCDC_TIMING2);
507 l &= ~0xff;
508
509 lck = clk_get_rate(lcdc.lcd_ck);
510
511 if (!panel->pcd)
512 calc_ck_div(is_tft, panel->pixel_clock * 1000, &pcd);
513 else {
514 dev_warn(lcdc.fbdev->dev,
515 "Pixel clock divider value is obsolete.\n"
516 "Try to set pixel_clock to %lu and pcd to 0 "
517 "in drivers/video/omap/lcd_%s.c and submit a patch.\n",
518 lck / panel->pcd / 1000, panel->name);
519
520 pcd = panel->pcd;
521 }
522 l |= pcd & 0xff;
523 l |= panel->acb << 8;
524 omap_writel(l, OMAP_LCDC_TIMING2);
525
526 /* update panel info with the exact clock */
527 panel->pixel_clock = lck / pcd / 1000;
528 }
529
530 /*
531 * Configure the LCD controller, download the color palette and start a looped
532 * DMA transfer of the frame image data. Called only in internal
533 * controller mode.
534 */
535 static int omap_lcdc_set_update_mode(enum omapfb_update_mode mode)
536 {
537 int r = 0;
538
539 if (mode != lcdc.update_mode) {
540 switch (mode) {
541 case OMAPFB_AUTO_UPDATE:
542 setup_regs();
543 load_palette();
544
545 /* Setup and start LCD DMA */
546 setup_lcd_dma();
547
548 set_load_mode(OMAP_LCDC_LOAD_FRAME);
549 enable_irqs(OMAP_LCDC_IRQ_DONE);
550 /* This will start the actual DMA transfer */
551 enable_controller();
552 lcdc.update_mode = mode;
553 break;
554 case OMAPFB_UPDATE_DISABLED:
555 disable_controller();
556 omap_stop_lcd_dma();
557 lcdc.update_mode = mode;
558 break;
559 default:
560 r = -EINVAL;
561 }
562 }
563
564 return r;
565 }
566
567 static enum omapfb_update_mode omap_lcdc_get_update_mode(void)
568 {
569 return lcdc.update_mode;
570 }
571
572 /* PM code called only in internal controller mode */
573 static void omap_lcdc_suspend(void)
574 {
575 omap_lcdc_set_update_mode(OMAPFB_UPDATE_DISABLED);
576 }
577
578 static void omap_lcdc_resume(void)
579 {
580 omap_lcdc_set_update_mode(OMAPFB_AUTO_UPDATE);
581 }
582
583 static void omap_lcdc_get_caps(int plane, struct omapfb_caps *caps)
584 {
585 return;
586 }
587
588 int omap_lcdc_set_dma_callback(void (*callback)(void *data), void *data)
589 {
590 BUG_ON(callback == NULL);
591
592 if (lcdc.dma_callback)
593 return -EBUSY;
594 else {
595 lcdc.dma_callback = callback;
596 lcdc.dma_callback_data = data;
597 }
598 return 0;
599 }
600 EXPORT_SYMBOL(omap_lcdc_set_dma_callback);
601
602 void omap_lcdc_free_dma_callback(void)
603 {
604 lcdc.dma_callback = NULL;
605 }
606 EXPORT_SYMBOL(omap_lcdc_free_dma_callback);
607
608 static void lcdc_dma_handler(u16 status, void *data)
609 {
610 if (lcdc.dma_callback)
611 lcdc.dma_callback(lcdc.dma_callback_data);
612 }
613
614 static int mmap_kern(void)
615 {
616 struct vm_struct *kvma;
617 struct vm_area_struct vma;
618 pgprot_t pgprot;
619 unsigned long vaddr;
620
621 kvma = get_vm_area(lcdc.vram_size, VM_IOREMAP);
622 if (kvma == NULL) {
623 dev_err(lcdc.fbdev->dev, "can't get kernel vm area\n");
624 return -ENOMEM;
625 }
626 vma.vm_mm = &init_mm;
627
628 vaddr = (unsigned long)kvma->addr;
629 vma.vm_start = vaddr;
630 vma.vm_end = vaddr + lcdc.vram_size;
631
632 pgprot = pgprot_writecombine(pgprot_kernel);
633 if (io_remap_pfn_range(&vma, vaddr,
634 lcdc.vram_phys >> PAGE_SHIFT,
635 lcdc.vram_size, pgprot) < 0) {
636 dev_err(lcdc.fbdev->dev, "kernel mmap for FB memory failed\n");
637 return -EAGAIN;
638 }
639
640 lcdc.vram_virt = (void *)vaddr;
641
642 return 0;
643 }
644
645 static void unmap_kern(void)
646 {
647 vunmap(lcdc.vram_virt);
648 }
649
650 static int alloc_palette_ram(void)
651 {
652 lcdc.palette_virt = dma_alloc_writecombine(lcdc.fbdev->dev,
653 MAX_PALETTE_SIZE, &lcdc.palette_phys, GFP_KERNEL);
654 if (lcdc.palette_virt == NULL) {
655 dev_err(lcdc.fbdev->dev, "failed to alloc palette memory\n");
656 return -ENOMEM;
657 }
658 memset(lcdc.palette_virt, 0, MAX_PALETTE_SIZE);
659
660 return 0;
661 }
662
663 static void free_palette_ram(void)
664 {
665 dma_free_writecombine(lcdc.fbdev->dev, MAX_PALETTE_SIZE,
666 lcdc.palette_virt, lcdc.palette_phys);
667 }
668
669 static int alloc_fbmem(struct omapfb_mem_region *region)
670 {
671 int bpp;
672 int frame_size;
673 struct lcd_panel *panel = lcdc.fbdev->panel;
674
675 bpp = panel->bpp;
676 if (bpp == 12)
677 bpp = 16;
678 frame_size = PAGE_ALIGN(panel->x_res * bpp / 8 * panel->y_res);
679 if (region->size > frame_size)
680 frame_size = region->size;
681 lcdc.vram_size = frame_size;
682 lcdc.vram_virt = dma_alloc_writecombine(lcdc.fbdev->dev,
683 lcdc.vram_size, &lcdc.vram_phys, GFP_KERNEL);
684 if (lcdc.vram_virt == NULL) {
685 dev_err(lcdc.fbdev->dev, "unable to allocate FB DMA memory\n");
686 return -ENOMEM;
687 }
688 region->size = frame_size;
689 region->paddr = lcdc.vram_phys;
690 region->vaddr = lcdc.vram_virt;
691 region->alloc = 1;
692
693 memset(lcdc.vram_virt, 0, lcdc.vram_size);
694
695 return 0;
696 }
697
698 static void free_fbmem(void)
699 {
700 dma_free_writecombine(lcdc.fbdev->dev, lcdc.vram_size,
701 lcdc.vram_virt, lcdc.vram_phys);
702 }
703
704 static int setup_fbmem(struct omapfb_mem_desc *req_md)
705 {
706 int r;
707
708 if (!req_md->region_cnt) {
709 dev_err(lcdc.fbdev->dev, "no memory regions defined\n");
710 return -EINVAL;
711 }
712
713 if (req_md->region_cnt > 1) {
714 dev_err(lcdc.fbdev->dev, "only one plane is supported\n");
715 req_md->region_cnt = 1;
716 }
717
718 if (req_md->region[0].paddr == 0) {
719 lcdc.fbmem_allocated = 1;
720 if ((r = alloc_fbmem(&req_md->region[0])) < 0)
721 return r;
722 return 0;
723 }
724
725 lcdc.vram_phys = req_md->region[0].paddr;
726 lcdc.vram_size = req_md->region[0].size;
727
728 if ((r = mmap_kern()) < 0)
729 return r;
730
731 dev_dbg(lcdc.fbdev->dev, "vram at %08x size %08lx mapped to 0x%p\n",
732 lcdc.vram_phys, lcdc.vram_size, lcdc.vram_virt);
733
734 return 0;
735 }
736
737 static void cleanup_fbmem(void)
738 {
739 if (lcdc.fbmem_allocated)
740 free_fbmem();
741 else
742 unmap_kern();
743 }
744
745 static int omap_lcdc_init(struct omapfb_device *fbdev, int ext_mode,
746 struct omapfb_mem_desc *req_vram)
747 {
748 int r;
749 u32 l;
750 int rate;
751 struct clk *tc_ck;
752
753 lcdc.irq_mask = 0;
754
755 lcdc.fbdev = fbdev;
756 lcdc.ext_mode = ext_mode;
757
758 l = 0;
759 omap_writel(l, OMAP_LCDC_CONTROL);
760
761 /* FIXME:
762 * According to errata some platforms have a clock rate limitiation
763 */
764 lcdc.lcd_ck = clk_get(fbdev->dev, "lcd_ck");
765 if (IS_ERR(lcdc.lcd_ck)) {
766 dev_err(fbdev->dev, "unable to access LCD clock\n");
767 r = PTR_ERR(lcdc.lcd_ck);
768 goto fail0;
769 }
770
771 tc_ck = clk_get(fbdev->dev, "tc_ck");
772 if (IS_ERR(tc_ck)) {
773 dev_err(fbdev->dev, "unable to access TC clock\n");
774 r = PTR_ERR(tc_ck);
775 goto fail1;
776 }
777
778 rate = clk_get_rate(tc_ck);
779 clk_put(tc_ck);
780
781 if (machine_is_ams_delta())
782 rate /= 4;
783 if (machine_is_omap_h3())
784 rate /= 3;
785 r = clk_set_rate(lcdc.lcd_ck, rate);
786 if (r) {
787 dev_err(fbdev->dev, "failed to adjust LCD rate\n");
788 goto fail1;
789 }
790 clk_enable(lcdc.lcd_ck);
791
792 r = request_irq(OMAP_LCDC_IRQ, lcdc_irq_handler, 0, MODULE_NAME, fbdev);
793 if (r) {
794 dev_err(fbdev->dev, "unable to get IRQ\n");
795 goto fail2;
796 }
797
798 r = omap_request_lcd_dma(lcdc_dma_handler, NULL);
799 if (r) {
800 dev_err(fbdev->dev, "unable to get LCD DMA\n");
801 goto fail3;
802 }
803
804 omap_set_lcd_dma_single_transfer(ext_mode);
805 omap_set_lcd_dma_ext_controller(ext_mode);
806
807 if (!ext_mode)
808 if ((r = alloc_palette_ram()) < 0)
809 goto fail4;
810
811 if ((r = setup_fbmem(req_vram)) < 0)
812 goto fail5;
813
814 pr_info("omapfb: LCDC initialized\n");
815
816 return 0;
817 fail5:
818 if (!ext_mode)
819 free_palette_ram();
820 fail4:
821 omap_free_lcd_dma();
822 fail3:
823 free_irq(OMAP_LCDC_IRQ, lcdc.fbdev);
824 fail2:
825 clk_disable(lcdc.lcd_ck);
826 fail1:
827 clk_put(lcdc.lcd_ck);
828 fail0:
829 return r;
830 }
831
832 static void omap_lcdc_cleanup(void)
833 {
834 if (!lcdc.ext_mode)
835 free_palette_ram();
836 cleanup_fbmem();
837 omap_free_lcd_dma();
838 free_irq(OMAP_LCDC_IRQ, lcdc.fbdev);
839 clk_disable(lcdc.lcd_ck);
840 clk_put(lcdc.lcd_ck);
841 }
842
843 const struct lcd_ctrl omap1_int_ctrl = {
844 .name = "internal",
845 .init = omap_lcdc_init,
846 .cleanup = omap_lcdc_cleanup,
847 .get_caps = omap_lcdc_get_caps,
848 .set_update_mode = omap_lcdc_set_update_mode,
849 .get_update_mode = omap_lcdc_get_update_mode,
850 .update_window = NULL,
851 .suspend = omap_lcdc_suspend,
852 .resume = omap_lcdc_resume,
853 .setup_plane = omap_lcdc_setup_plane,
854 .enable_plane = omap_lcdc_enable_plane,
855 .setcolreg = omap_lcdc_setcolreg,
856 };
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