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authorImre Deak <imre.deak@solidboot.com>2007-07-17 07:05:56 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-17 13:23:13 -0400
commit569755c706f0f94409edd2ae60b9878cb420844f (patch)
tree20c461e3aaf4a9fb7a216758987be5f5ab20c6e3 /drivers/video/omap/lcdc.c
parentfe0e3a9df6372d357d3fdc4b6265a5417f1e84e8 (diff)
OMAP: add TI OMAP1 internal LCD controller
- Add Texas Instruments OMAP1 processor series (OMAP1510/1610/1710..) internal LCD controller interface. Signed-off-by: Trilok Soni <soni.trilok@gmail.com> Cc: Tony Lindgren <tony@atomide.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/omap/lcdc.c')
-rw-r--r--drivers/video/omap/lcdc.c893
1 files changed, 893 insertions, 0 deletions
diff --git a/drivers/video/omap/lcdc.c b/drivers/video/omap/lcdc.c
new file mode 100644
index 000000000000..9085188d815e
--- /dev/null
+++ b/drivers/video/omap/lcdc.c
@@ -0,0 +1,893 @@
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
32#include <asm/arch/dma.h>
33#include <asm/arch/omapfb.h>
34
35#include <asm/mach-types.h>
36
37#define MODULE_NAME "lcdc"
38
39#define OMAP_LCDC_BASE 0xfffec000
40#define OMAP_LCDC_SIZE 256
41#define OMAP_LCDC_IRQ INT_LCD_CTRL
42
43#define OMAP_LCDC_CONTROL (OMAP_LCDC_BASE + 0x00)
44#define OMAP_LCDC_TIMING0 (OMAP_LCDC_BASE + 0x04)
45#define OMAP_LCDC_TIMING1 (OMAP_LCDC_BASE + 0x08)
46#define OMAP_LCDC_TIMING2 (OMAP_LCDC_BASE + 0x0c)
47#define OMAP_LCDC_STATUS (OMAP_LCDC_BASE + 0x10)
48#define OMAP_LCDC_SUBPANEL (OMAP_LCDC_BASE + 0x14)
49#define OMAP_LCDC_LINE_INT (OMAP_LCDC_BASE + 0x18)
50#define OMAP_LCDC_DISPLAY_STATUS (OMAP_LCDC_BASE + 0x1c)
51
52#define OMAP_LCDC_STAT_DONE (1 << 0)
53#define OMAP_LCDC_STAT_VSYNC (1 << 1)
54#define OMAP_LCDC_STAT_SYNC_LOST (1 << 2)
55#define OMAP_LCDC_STAT_ABC (1 << 3)
56#define OMAP_LCDC_STAT_LINE_INT (1 << 4)
57#define OMAP_LCDC_STAT_FUF (1 << 5)
58#define OMAP_LCDC_STAT_LOADED_PALETTE (1 << 6)
59
60#define OMAP_LCDC_CTRL_LCD_EN (1 << 0)
61#define OMAP_LCDC_CTRL_LCD_TFT (1 << 7)
62#define OMAP_LCDC_CTRL_LINE_IRQ_CLR_SEL (1 << 10)
63
64#define OMAP_LCDC_IRQ_VSYNC (1 << 2)
65#define OMAP_LCDC_IRQ_DONE (1 << 3)
66#define OMAP_LCDC_IRQ_LOADED_PALETTE (1 << 4)
67#define OMAP_LCDC_IRQ_LINE_NIRQ (1 << 5)
68#define OMAP_LCDC_IRQ_LINE (1 << 6)
69#define OMAP_LCDC_IRQ_MASK (((1 << 5) - 1) << 2)
70
71#define MAX_PALETTE_SIZE PAGE_SIZE
72
73enum lcdc_load_mode {
74 OMAP_LCDC_LOAD_PALETTE,
75 OMAP_LCDC_LOAD_FRAME,
76 OMAP_LCDC_LOAD_PALETTE_AND_FRAME
77};
78
79static struct omap_lcd_controller {
80 enum omapfb_update_mode update_mode;
81 int ext_mode;
82
83 unsigned long frame_offset;
84 int screen_width;
85 int xres;
86 int yres;
87
88 enum omapfb_color_format color_mode;
89 int bpp;
90 void *palette_virt;
91 dma_addr_t palette_phys;
92 int palette_code;
93 int palette_size;
94
95 unsigned int irq_mask;
96 struct completion last_frame_complete;
97 struct completion palette_load_complete;
98 struct clk *lcd_ck;
99 struct omapfb_device *fbdev;
100
101 void (*dma_callback)(void *data);
102 void *dma_callback_data;
103
104 int fbmem_allocated;
105 dma_addr_t vram_phys;
106 void *vram_virt;
107 unsigned long vram_size;
108} lcdc;
109
110static void inline enable_irqs(int mask)
111{
112 lcdc.irq_mask |= mask;
113}
114
115static void inline disable_irqs(int mask)
116{
117 lcdc.irq_mask &= ~mask;
118}
119
120static void set_load_mode(enum lcdc_load_mode mode)
121{
122 u32 l;
123
124 l = omap_readl(OMAP_LCDC_CONTROL);
125 l &= ~(3 << 20);
126 switch (mode) {
127 case OMAP_LCDC_LOAD_PALETTE:
128 l |= 1 << 20;
129 break;
130 case OMAP_LCDC_LOAD_FRAME:
131 l |= 2 << 20;
132 break;
133 case OMAP_LCDC_LOAD_PALETTE_AND_FRAME:
134 break;
135 default:
136 BUG();
137 }
138 omap_writel(l, OMAP_LCDC_CONTROL);
139}
140
141static void enable_controller(void)
142{
143 u32 l;
144
145 l = omap_readl(OMAP_LCDC_CONTROL);
146 l |= OMAP_LCDC_CTRL_LCD_EN;
147 l &= ~OMAP_LCDC_IRQ_MASK;
148 l |= lcdc.irq_mask | OMAP_LCDC_IRQ_DONE; /* enabled IRQs */
149 omap_writel(l, OMAP_LCDC_CONTROL);
150}
151
152static void disable_controller_async(void)
153{
154 u32 l;
155 u32 mask;
156
157 l = omap_readl(OMAP_LCDC_CONTROL);
158 mask = OMAP_LCDC_CTRL_LCD_EN | OMAP_LCDC_IRQ_MASK;
159 /*
160 * Preserve the DONE mask, since we still want to get the
161 * final DONE irq. It will be disabled in the IRQ handler.
162 */
163 mask &= ~OMAP_LCDC_IRQ_DONE;
164 l &= ~mask;
165 omap_writel(l, OMAP_LCDC_CONTROL);
166}
167
168static void disable_controller(void)
169{
170 init_completion(&lcdc.last_frame_complete);
171 disable_controller_async();
172 if (!wait_for_completion_timeout(&lcdc.last_frame_complete,
173 msecs_to_jiffies(500)))
174 dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n");
175}
176
177static void reset_controller(u32 status)
178{
179 static unsigned long reset_count;
180 static unsigned long last_jiffies;
181
182 disable_controller_async();
183 reset_count++;
184 if (reset_count == 1 || time_after(jiffies, last_jiffies + HZ)) {
185 dev_err(lcdc.fbdev->dev,
186 "resetting (status %#010x,reset count %lu)\n",
187 status, reset_count);
188 last_jiffies = jiffies;
189 }
190 if (reset_count < 100) {
191 enable_controller();
192 } else {
193 reset_count = 0;
194 dev_err(lcdc.fbdev->dev,
195 "too many reset attempts, giving up.\n");
196 }
197}
198
199/*
200 * Configure the LCD DMA according to the current mode specified by parameters
201 * in lcdc.fbdev and fbdev->var.
202 */
203static void setup_lcd_dma(void)
204{
205 static const int dma_elem_type[] = {
206 0,
207 OMAP_DMA_DATA_TYPE_S8,
208 OMAP_DMA_DATA_TYPE_S16,
209 0,
210 OMAP_DMA_DATA_TYPE_S32,
211 };
212 struct omapfb_plane_struct *plane = lcdc.fbdev->fb_info[0]->par;
213 struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var;
214 unsigned long src;
215 int esize, xelem, yelem;
216
217 src = lcdc.vram_phys + lcdc.frame_offset;
218
219 switch (var->rotate) {
220 case 0:
221 if (plane->info.mirror || (src & 3) ||
222 lcdc.color_mode == OMAPFB_COLOR_YUV420 ||
223 (lcdc.xres & 1))
224 esize = 2;
225 else
226 esize = 4;
227 xelem = lcdc.xres * lcdc.bpp / 8 / esize;
228 yelem = lcdc.yres;
229 break;
230 case 90:
231 case 180:
232 case 270:
233 if (cpu_is_omap15xx()) {
234 BUG();
235 }
236 esize = 2;
237 xelem = lcdc.yres * lcdc.bpp / 16;
238 yelem = lcdc.xres;
239 break;
240 default:
241 BUG();
242 return;
243 }
244#ifdef VERBOSE
245 dev_dbg(lcdc.fbdev->dev,
246 "setup_dma: src %#010lx esize %d xelem %d yelem %d\n",
247 src, esize, xelem, yelem);
248#endif
249 omap_set_lcd_dma_b1(src, xelem, yelem, dma_elem_type[esize]);
250 if (!cpu_is_omap15xx()) {
251 int bpp = lcdc.bpp;
252
253 /*
254 * YUV support is only for external mode when we have the
255 * YUV window embedded in a 16bpp frame buffer.
256 */
257 if (lcdc.color_mode == OMAPFB_COLOR_YUV420)
258 bpp = 16;
259 /* Set virtual xres elem size */
260 omap_set_lcd_dma_b1_vxres(
261 lcdc.screen_width * bpp / 8 / esize);
262 /* Setup transformations */
263 omap_set_lcd_dma_b1_rotation(var->rotate);
264 omap_set_lcd_dma_b1_mirror(plane->info.mirror);
265 }
266 omap_setup_lcd_dma();
267}
268
269static irqreturn_t lcdc_irq_handler(int irq, void *dev_id)
270{
271 u32 status;
272
273 status = omap_readl(OMAP_LCDC_STATUS);
274
275 if (status & (OMAP_LCDC_STAT_FUF | OMAP_LCDC_STAT_SYNC_LOST))
276 reset_controller(status);
277 else {
278 if (status & OMAP_LCDC_STAT_DONE) {
279 u32 l;
280
281 /*
282 * Disable IRQ_DONE. The status bit will be cleared
283 * only when the controller is reenabled and we don't
284 * want to get more interrupts.
285 */
286 l = omap_readl(OMAP_LCDC_CONTROL);
287 l &= ~OMAP_LCDC_IRQ_DONE;
288 omap_writel(l, OMAP_LCDC_CONTROL);
289 complete(&lcdc.last_frame_complete);
290 }
291 if (status & OMAP_LCDC_STAT_LOADED_PALETTE) {
292 disable_controller_async();
293 complete(&lcdc.palette_load_complete);
294 }
295 }
296
297 /*
298 * Clear these interrupt status bits.
299 * Sync_lost, FUF bits were cleared by disabling the LCD controller
300 * LOADED_PALETTE can be cleared this way only in palette only
301 * load mode. In other load modes it's cleared by disabling the
302 * controller.
303 */
304 status &= ~(OMAP_LCDC_STAT_VSYNC |
305 OMAP_LCDC_STAT_LOADED_PALETTE |
306 OMAP_LCDC_STAT_ABC |
307 OMAP_LCDC_STAT_LINE_INT);
308 omap_writel(status, OMAP_LCDC_STATUS);
309 return IRQ_HANDLED;
310}
311
312/*
313 * Change to a new video mode. We defer this to a later time to avoid any
314 * flicker and not to mess up the current LCD DMA context. For this we disable
315 * the LCD controler, which will generate a DONE irq after the last frame has
316 * been transferred. Then it'll be safe to reconfigure both the LCD controller
317 * as well as the LCD DMA.
318 */
319static int omap_lcdc_setup_plane(int plane, int channel_out,
320 unsigned long offset, int screen_width,
321 int pos_x, int pos_y, int width, int height,
322 int color_mode)
323{
324 struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var;
325 struct lcd_panel *panel = lcdc.fbdev->panel;
326 int rot_x, rot_y;
327
328 if (var->rotate == 0) {
329 rot_x = panel->x_res;
330 rot_y = panel->y_res;
331 } else {
332 rot_x = panel->y_res;
333 rot_y = panel->x_res;
334 }
335 if (plane != 0 || channel_out != 0 || pos_x != 0 || pos_y != 0 ||
336 width > rot_x || height > rot_y) {
337#ifdef VERBOSE
338 dev_dbg(lcdc.fbdev->dev,
339 "invalid plane params plane %d pos_x %d pos_y %d "
340 "w %d h %d\n", plane, pos_x, pos_y, width, height);
341#endif
342 return -EINVAL;
343 }
344
345 lcdc.frame_offset = offset;
346 lcdc.xres = width;
347 lcdc.yres = height;
348 lcdc.screen_width = screen_width;
349 lcdc.color_mode = color_mode;
350
351 switch (color_mode) {
352 case OMAPFB_COLOR_CLUT_8BPP:
353 lcdc.bpp = 8;
354 lcdc.palette_code = 0x3000;
355 lcdc.palette_size = 512;
356 break;
357 case OMAPFB_COLOR_RGB565:
358 lcdc.bpp = 16;
359 lcdc.palette_code = 0x4000;
360 lcdc.palette_size = 32;
361 break;
362 case OMAPFB_COLOR_RGB444:
363 lcdc.bpp = 16;
364 lcdc.palette_code = 0x4000;
365 lcdc.palette_size = 32;
366 break;
367 case OMAPFB_COLOR_YUV420:
368 if (lcdc.ext_mode) {
369 lcdc.bpp = 12;
370 break;
371 }
372 /* fallthrough */
373 case OMAPFB_COLOR_YUV422:
374 if (lcdc.ext_mode) {
375 lcdc.bpp = 16;
376 break;
377 }
378 /* fallthrough */
379 default:
380 /* FIXME: other BPPs.
381 * bpp1: code 0, size 256
382 * bpp2: code 0x1000 size 256
383 * bpp4: code 0x2000 size 256
384 * bpp12: code 0x4000 size 32
385 */
386 dev_dbg(lcdc.fbdev->dev, "invalid color mode %d\n", color_mode);
387 BUG();
388 return -1;
389 }
390
391 if (lcdc.ext_mode) {
392 setup_lcd_dma();
393 return 0;
394 }
395
396 if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) {
397 disable_controller();
398 omap_stop_lcd_dma();
399 setup_lcd_dma();
400 enable_controller();
401 }
402
403 return 0;
404}
405
406static int omap_lcdc_enable_plane(int plane, int enable)
407{
408 dev_dbg(lcdc.fbdev->dev,
409 "plane %d enable %d update_mode %d ext_mode %d\n",
410 plane, enable, lcdc.update_mode, lcdc.ext_mode);
411 if (plane != OMAPFB_PLANE_GFX)
412 return -EINVAL;
413
414 return 0;
415}
416
417/*
418 * Configure the LCD DMA for a palette load operation and do the palette
419 * downloading synchronously. We don't use the frame+palette load mode of
420 * the controller, since the palette can always be downloaded seperately.
421 */
422static void load_palette(void)
423{
424 u16 *palette;
425
426 palette = (u16 *)lcdc.palette_virt;
427
428 *(u16 *)palette &= 0x0fff;
429 *(u16 *)palette |= lcdc.palette_code;
430
431 omap_set_lcd_dma_b1(lcdc.palette_phys,
432 lcdc.palette_size / 4 + 1, 1, OMAP_DMA_DATA_TYPE_S32);
433
434 omap_set_lcd_dma_single_transfer(1);
435 omap_setup_lcd_dma();
436
437 init_completion(&lcdc.palette_load_complete);
438 enable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE);
439 set_load_mode(OMAP_LCDC_LOAD_PALETTE);
440 enable_controller();
441 if (!wait_for_completion_timeout(&lcdc.palette_load_complete,
442 msecs_to_jiffies(500)))
443 dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n");
444 /* The controller gets disabled in the irq handler */
445 disable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE);
446 omap_stop_lcd_dma();
447
448 omap_set_lcd_dma_single_transfer(lcdc.ext_mode);
449}
450
451/* Used only in internal controller mode */
452static int omap_lcdc_setcolreg(u_int regno, u16 red, u16 green, u16 blue,
453 u16 transp, int update_hw_pal)
454{
455 u16 *palette;
456
457 if (lcdc.color_mode != OMAPFB_COLOR_CLUT_8BPP || regno > 255)
458 return -EINVAL;
459
460 palette = (u16 *)lcdc.palette_virt;
461
462 palette[regno] &= ~0x0fff;
463 palette[regno] |= ((red >> 12) << 8) | ((green >> 12) << 4 ) |
464 (blue >> 12);
465
466 if (update_hw_pal) {
467 disable_controller();
468 omap_stop_lcd_dma();
469 load_palette();
470 setup_lcd_dma();
471 set_load_mode(OMAP_LCDC_LOAD_FRAME);
472 enable_controller();
473 }
474
475 return 0;
476}
477
478static void calc_ck_div(int is_tft, int pck, int *pck_div)
479{
480 unsigned long lck;
481
482 pck = max(1, pck);
483 lck = clk_get_rate(lcdc.lcd_ck);
484 *pck_div = (lck + pck - 1) / pck;
485 if (is_tft)
486 *pck_div = max(2, *pck_div);
487 else
488 *pck_div = max(3, *pck_div);
489 if (*pck_div > 255) {
490 /* FIXME: try to adjust logic clock divider as well */
491 *pck_div = 255;
492 dev_warn(lcdc.fbdev->dev, "pixclock %d kHz too low.\n",
493 pck / 1000);
494 }
495}
496
497static void inline setup_regs(void)
498{
499 u32 l;
500 struct lcd_panel *panel = lcdc.fbdev->panel;
501 int is_tft = panel->config & OMAP_LCDC_PANEL_TFT;
502 unsigned long lck;
503 int pcd;
504
505 l = omap_readl(OMAP_LCDC_CONTROL);
506 l &= ~OMAP_LCDC_CTRL_LCD_TFT;
507 l |= is_tft ? OMAP_LCDC_CTRL_LCD_TFT : 0;
508#ifdef CONFIG_MACH_OMAP_PALMTE
509/* FIXME:if (machine_is_omap_palmte()) { */
510 /* PalmTE uses alternate TFT setting in 8BPP mode */
511 l |= (is_tft && panel->bpp == 8) ? 0x810000 : 0;
512/* } */
513#endif
514 omap_writel(l, OMAP_LCDC_CONTROL);
515
516 l = omap_readl(OMAP_LCDC_TIMING2);
517 l &= ~(((1 << 6) - 1) << 20);
518 l |= (panel->config & OMAP_LCDC_SIGNAL_MASK) << 20;
519 omap_writel(l, OMAP_LCDC_TIMING2);
520
521 l = panel->x_res - 1;
522 l |= (panel->hsw - 1) << 10;
523 l |= (panel->hfp - 1) << 16;
524 l |= (panel->hbp - 1) << 24;
525 omap_writel(l, OMAP_LCDC_TIMING0);
526
527 l = panel->y_res - 1;
528 l |= (panel->vsw - 1) << 10;
529 l |= panel->vfp << 16;
530 l |= panel->vbp << 24;
531 omap_writel(l, OMAP_LCDC_TIMING1);
532
533 l = omap_readl(OMAP_LCDC_TIMING2);
534 l &= ~0xff;
535
536 lck = clk_get_rate(lcdc.lcd_ck);
537
538 if (!panel->pcd)
539 calc_ck_div(is_tft, panel->pixel_clock * 1000, &pcd);
540 else {
541 dev_warn(lcdc.fbdev->dev,
542 "Pixel clock divider value is obsolete.\n"
543 "Try to set pixel_clock to %lu and pcd to 0 "
544 "in drivers/video/omap/lcd_%s.c and submit a patch.\n",
545 lck / panel->pcd / 1000, panel->name);
546
547 pcd = panel->pcd;
548 }
549 l |= pcd & 0xff;
550 l |= panel->acb << 8;
551 omap_writel(l, OMAP_LCDC_TIMING2);
552
553 /* update panel info with the exact clock */
554 panel->pixel_clock = lck / pcd / 1000;
555}
556
557/*
558 * Configure the LCD controller, download the color palette and start a looped
559 * DMA transfer of the frame image data. Called only in internal
560 * controller mode.
561 */
562static int omap_lcdc_set_update_mode(enum omapfb_update_mode mode)
563{
564 int r = 0;
565
566 if (mode != lcdc.update_mode) {
567 switch (mode) {
568 case OMAPFB_AUTO_UPDATE:
569 setup_regs();
570 load_palette();
571
572 /* Setup and start LCD DMA */
573 setup_lcd_dma();
574
575 set_load_mode(OMAP_LCDC_LOAD_FRAME);
576 enable_irqs(OMAP_LCDC_IRQ_DONE);
577 /* This will start the actual DMA transfer */
578 enable_controller();
579 lcdc.update_mode = mode;
580 break;
581 case OMAPFB_UPDATE_DISABLED:
582 disable_controller();
583 omap_stop_lcd_dma();
584 lcdc.update_mode = mode;
585 break;
586 default:
587 r = -EINVAL;
588 }
589 }
590
591 return r;
592}
593
594static enum omapfb_update_mode omap_lcdc_get_update_mode(void)
595{
596 return lcdc.update_mode;
597}
598
599/* PM code called only in internal controller mode */
600static void omap_lcdc_suspend(void)
601{
602 if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) {
603 disable_controller();
604 omap_stop_lcd_dma();
605 }
606}
607
608static void omap_lcdc_resume(void)
609{
610 if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) {
611 setup_regs();
612 load_palette();
613 setup_lcd_dma();
614 set_load_mode(OMAP_LCDC_LOAD_FRAME);
615 enable_irqs(OMAP_LCDC_IRQ_DONE);
616 enable_controller();
617 }
618}
619
620static void omap_lcdc_get_caps(int plane, struct omapfb_caps *caps)
621{
622 return;
623}
624
625int omap_lcdc_set_dma_callback(void (*callback)(void *data), void *data)
626{
627 BUG_ON(callback == NULL);
628
629 if (lcdc.dma_callback)
630 return -EBUSY;
631 else {
632 lcdc.dma_callback = callback;
633 lcdc.dma_callback_data = data;
634 }
635 return 0;
636}
637EXPORT_SYMBOL(omap_lcdc_set_dma_callback);
638
639void omap_lcdc_free_dma_callback(void)
640{
641 lcdc.dma_callback = NULL;
642}
643EXPORT_SYMBOL(omap_lcdc_free_dma_callback);
644
645static void lcdc_dma_handler(u16 status, void *data)
646{
647 if (lcdc.dma_callback)
648 lcdc.dma_callback(lcdc.dma_callback_data);
649}
650
651static int mmap_kern(void)
652{
653 struct vm_struct *kvma;
654 struct vm_area_struct vma;
655 pgprot_t pgprot;
656 unsigned long vaddr;
657
658 kvma = get_vm_area(lcdc.vram_size, VM_IOREMAP);
659 if (kvma == NULL) {
660 dev_err(lcdc.fbdev->dev, "can't get kernel vm area\n");
661 return -ENOMEM;
662 }
663 vma.vm_mm = &init_mm;
664
665 vaddr = (unsigned long)kvma->addr;
666 vma.vm_start = vaddr;
667 vma.vm_end = vaddr + lcdc.vram_size;
668
669 pgprot = pgprot_writecombine(pgprot_kernel);
670 if (io_remap_pfn_range(&vma, vaddr,
671 lcdc.vram_phys >> PAGE_SHIFT,
672 lcdc.vram_size, pgprot) < 0) {
673 dev_err(lcdc.fbdev->dev, "kernel mmap for FB memory failed\n");
674 return -EAGAIN;
675 }
676
677 lcdc.vram_virt = (void *)vaddr;
678
679 return 0;
680}
681
682static void unmap_kern(void)
683{
684 vunmap(lcdc.vram_virt);
685}
686
687static int alloc_palette_ram(void)
688{
689 lcdc.palette_virt = dma_alloc_writecombine(lcdc.fbdev->dev,
690 MAX_PALETTE_SIZE, &lcdc.palette_phys, GFP_KERNEL);
691 if (lcdc.palette_virt == NULL) {
692 dev_err(lcdc.fbdev->dev, "failed to alloc palette memory\n");
693 return -ENOMEM;
694 }
695 memset(lcdc.palette_virt, 0, MAX_PALETTE_SIZE);
696
697 return 0;
698}
699
700static void free_palette_ram(void)
701{
702 dma_free_writecombine(lcdc.fbdev->dev, MAX_PALETTE_SIZE,
703 lcdc.palette_virt, lcdc.palette_phys);
704}
705
706static int alloc_fbmem(struct omapfb_mem_region *region)
707{
708 int bpp;
709 int frame_size;
710 struct lcd_panel *panel = lcdc.fbdev->panel;
711
712 bpp = panel->bpp;
713 if (bpp == 12)
714 bpp = 16;
715 frame_size = PAGE_ALIGN(panel->x_res * bpp / 8 * panel->y_res);
716 if (region->size > frame_size)
717 frame_size = region->size;
718 lcdc.vram_size = frame_size;
719 lcdc.vram_virt = dma_alloc_writecombine(lcdc.fbdev->dev,
720 lcdc.vram_size, &lcdc.vram_phys, GFP_KERNEL);
721 if (lcdc.vram_virt == NULL) {
722 dev_err(lcdc.fbdev->dev, "unable to allocate FB DMA memory\n");
723 return -ENOMEM;
724 }
725 region->size = frame_size;
726 region->paddr = lcdc.vram_phys;
727 region->vaddr = lcdc.vram_virt;
728 region->alloc = 1;
729
730 memset(lcdc.vram_virt, 0, lcdc.vram_size);
731
732 return 0;
733}
734
735static void free_fbmem(void)
736{
737 dma_free_writecombine(lcdc.fbdev->dev, lcdc.vram_size,
738 lcdc.vram_virt, lcdc.vram_phys);
739}
740
741static int setup_fbmem(struct omapfb_mem_desc *req_md)
742{
743 int r;
744
745 if (!req_md->region_cnt) {
746 dev_err(lcdc.fbdev->dev, "no memory regions defined\n");
747 return -EINVAL;
748 }
749
750 if (req_md->region_cnt > 1) {
751 dev_err(lcdc.fbdev->dev, "only one plane is supported\n");
752 req_md->region_cnt = 1;
753 }
754
755 if (req_md->region[0].paddr == 0) {
756 lcdc.fbmem_allocated = 1;
757 if ((r = alloc_fbmem(&req_md->region[0])) < 0)
758 return r;
759 return 0;
760 }
761
762 lcdc.vram_phys = req_md->region[0].paddr;
763 lcdc.vram_size = req_md->region[0].size;
764
765 if ((r = mmap_kern()) < 0)
766 return r;
767
768 dev_dbg(lcdc.fbdev->dev, "vram at %08x size %08lx mapped to 0x%p\n",
769 lcdc.vram_phys, lcdc.vram_size, lcdc.vram_virt);
770
771 return 0;
772}
773
774static void cleanup_fbmem(void)
775{
776 if (lcdc.fbmem_allocated)
777 free_fbmem();
778 else
779 unmap_kern();
780}
781
782static int omap_lcdc_init(struct omapfb_device *fbdev, int ext_mode,
783 struct omapfb_mem_desc *req_vram)
784{
785 int r;
786 u32 l;
787 int rate;
788 struct clk *tc_ck;
789
790 lcdc.irq_mask = 0;
791
792 lcdc.fbdev = fbdev;
793 lcdc.ext_mode = ext_mode;
794
795 l = 0;
796 omap_writel(l, OMAP_LCDC_CONTROL);
797
798 /* FIXME:
799 * According to errata some platforms have a clock rate limitiation
800 */
801 lcdc.lcd_ck = clk_get(NULL, "lcd_ck");
802 if (IS_ERR(lcdc.lcd_ck)) {
803 dev_err(fbdev->dev, "unable to access LCD clock\n");
804 r = PTR_ERR(lcdc.lcd_ck);
805 goto fail0;
806 }
807
808 tc_ck = clk_get(NULL, "tc_ck");
809 if (IS_ERR(tc_ck)) {
810 dev_err(fbdev->dev, "unable to access TC clock\n");
811 r = PTR_ERR(tc_ck);
812 goto fail1;
813 }
814
815 rate = clk_get_rate(tc_ck);
816 clk_put(tc_ck);
817
818 if (machine_is_ams_delta())
819 rate /= 4;
820 if (machine_is_omap_h3())
821 rate /= 3;
822 r = clk_set_rate(lcdc.lcd_ck, rate);
823 if (r) {
824 dev_err(fbdev->dev, "failed to adjust LCD rate\n");
825 goto fail1;
826 }
827 clk_enable(lcdc.lcd_ck);
828
829 r = request_irq(OMAP_LCDC_IRQ, lcdc_irq_handler, 0, MODULE_NAME, fbdev);
830 if (r) {
831 dev_err(fbdev->dev, "unable to get IRQ\n");
832 goto fail2;
833 }
834
835 r = omap_request_lcd_dma(lcdc_dma_handler, NULL);
836 if (r) {
837 dev_err(fbdev->dev, "unable to get LCD DMA\n");
838 goto fail3;
839 }
840
841 omap_set_lcd_dma_single_transfer(ext_mode);
842 omap_set_lcd_dma_ext_controller(ext_mode);
843
844 if (!ext_mode)
845 if ((r = alloc_palette_ram()) < 0)
846 goto fail4;
847
848 if ((r = setup_fbmem(req_vram)) < 0)
849 goto fail5;
850
851 pr_info("omapfb: LCDC initialized\n");
852
853 return 0;
854fail5:
855 if (!ext_mode)
856 free_palette_ram();
857fail4:
858 omap_free_lcd_dma();
859fail3:
860 free_irq(OMAP_LCDC_IRQ, lcdc.fbdev);
861fail2:
862 clk_disable(lcdc.lcd_ck);
863fail1:
864 clk_put(lcdc.lcd_ck);
865fail0:
866 return r;
867}
868
869static void omap_lcdc_cleanup(void)
870{
871 if (!lcdc.ext_mode)
872 free_palette_ram();
873 cleanup_fbmem();
874 omap_free_lcd_dma();
875 free_irq(OMAP_LCDC_IRQ, lcdc.fbdev);
876 clk_disable(lcdc.lcd_ck);
877 clk_put(lcdc.lcd_ck);
878}
879
880const struct lcd_ctrl omap1_int_ctrl = {
881 .name = "internal",
882 .init = omap_lcdc_init,
883 .cleanup = omap_lcdc_cleanup,
884 .get_caps = omap_lcdc_get_caps,
885 .set_update_mode = omap_lcdc_set_update_mode,
886 .get_update_mode = omap_lcdc_get_update_mode,
887 .update_window = NULL,
888 .suspend = omap_lcdc_suspend,
889 .resume = omap_lcdc_resume,
890 .setup_plane = omap_lcdc_setup_plane,
891 .enable_plane = omap_lcdc_enable_plane,
892 .setcolreg = omap_lcdc_setcolreg,
893};
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 11:24:30 -0500