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569755c7 ID |
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 | ||
8d72c796 | 32 | #include <mach/lcdc.h> |
ce491cf8 | 33 | #include <plat/dma.h> |
569755c7 ID |
34 | |
35 | #include <asm/mach-types.h> | |
36 | ||
91773a00 TV |
37 | #include "omapfb.h" |
38 | ||
7c8ad982 RK |
39 | #include "lcdc.h" |
40 | ||
569755c7 ID |
41 | #define MODULE_NAME "lcdc" |
42 | ||
569755c7 ID |
43 | #define MAX_PALETTE_SIZE PAGE_SIZE |
44 | ||
45 | enum lcdc_load_mode { | |
46 | OMAP_LCDC_LOAD_PALETTE, | |
47 | OMAP_LCDC_LOAD_FRAME, | |
48 | OMAP_LCDC_LOAD_PALETTE_AND_FRAME | |
49 | }; | |
50 | ||
51 | static struct omap_lcd_controller { | |
52 | enum omapfb_update_mode update_mode; | |
53 | int ext_mode; | |
54 | ||
55 | unsigned long frame_offset; | |
56 | int screen_width; | |
57 | int xres; | |
58 | int yres; | |
59 | ||
60 | enum omapfb_color_format color_mode; | |
61 | int bpp; | |
62 | void *palette_virt; | |
63 | dma_addr_t palette_phys; | |
64 | int palette_code; | |
65 | int palette_size; | |
66 | ||
67 | unsigned int irq_mask; | |
68 | struct completion last_frame_complete; | |
69 | struct completion palette_load_complete; | |
70 | struct clk *lcd_ck; | |
71 | struct omapfb_device *fbdev; | |
72 | ||
73 | void (*dma_callback)(void *data); | |
74 | void *dma_callback_data; | |
75 | ||
76 | int fbmem_allocated; | |
77 | dma_addr_t vram_phys; | |
78 | void *vram_virt; | |
79 | unsigned long vram_size; | |
80 | } lcdc; | |
81 | ||
82 | static void inline enable_irqs(int mask) | |
83 | { | |
84 | lcdc.irq_mask |= mask; | |
85 | } | |
86 | ||
87 | static void inline disable_irqs(int mask) | |
88 | { | |
89 | lcdc.irq_mask &= ~mask; | |
90 | } | |
91 | ||
92 | static void set_load_mode(enum lcdc_load_mode mode) | |
93 | { | |
94 | u32 l; | |
95 | ||
96 | l = omap_readl(OMAP_LCDC_CONTROL); | |
97 | l &= ~(3 << 20); | |
98 | switch (mode) { | |
99 | case OMAP_LCDC_LOAD_PALETTE: | |
100 | l |= 1 << 20; | |
101 | break; | |
102 | case OMAP_LCDC_LOAD_FRAME: | |
103 | l |= 2 << 20; | |
104 | break; | |
105 | case OMAP_LCDC_LOAD_PALETTE_AND_FRAME: | |
106 | break; | |
107 | default: | |
108 | BUG(); | |
109 | } | |
110 | omap_writel(l, OMAP_LCDC_CONTROL); | |
111 | } | |
112 | ||
113 | static void enable_controller(void) | |
114 | { | |
115 | u32 l; | |
116 | ||
117 | l = omap_readl(OMAP_LCDC_CONTROL); | |
118 | l |= OMAP_LCDC_CTRL_LCD_EN; | |
119 | l &= ~OMAP_LCDC_IRQ_MASK; | |
120 | l |= lcdc.irq_mask | OMAP_LCDC_IRQ_DONE; /* enabled IRQs */ | |
121 | omap_writel(l, OMAP_LCDC_CONTROL); | |
122 | } | |
123 | ||
124 | static void disable_controller_async(void) | |
125 | { | |
126 | u32 l; | |
127 | u32 mask; | |
128 | ||
129 | l = omap_readl(OMAP_LCDC_CONTROL); | |
130 | mask = OMAP_LCDC_CTRL_LCD_EN | OMAP_LCDC_IRQ_MASK; | |
131 | /* | |
132 | * Preserve the DONE mask, since we still want to get the | |
133 | * final DONE irq. It will be disabled in the IRQ handler. | |
134 | */ | |
135 | mask &= ~OMAP_LCDC_IRQ_DONE; | |
136 | l &= ~mask; | |
137 | omap_writel(l, OMAP_LCDC_CONTROL); | |
138 | } | |
139 | ||
140 | static void disable_controller(void) | |
141 | { | |
142 | init_completion(&lcdc.last_frame_complete); | |
143 | disable_controller_async(); | |
144 | if (!wait_for_completion_timeout(&lcdc.last_frame_complete, | |
145 | msecs_to_jiffies(500))) | |
146 | dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n"); | |
147 | } | |
148 | ||
149 | static void reset_controller(u32 status) | |
150 | { | |
151 | static unsigned long reset_count; | |
152 | static unsigned long last_jiffies; | |
153 | ||
154 | disable_controller_async(); | |
155 | reset_count++; | |
156 | if (reset_count == 1 || time_after(jiffies, last_jiffies + HZ)) { | |
157 | dev_err(lcdc.fbdev->dev, | |
158 | "resetting (status %#010x,reset count %lu)\n", | |
159 | status, reset_count); | |
160 | last_jiffies = jiffies; | |
161 | } | |
162 | if (reset_count < 100) { | |
163 | enable_controller(); | |
164 | } else { | |
165 | reset_count = 0; | |
166 | dev_err(lcdc.fbdev->dev, | |
167 | "too many reset attempts, giving up.\n"); | |
168 | } | |
169 | } | |
170 | ||
171 | /* | |
172 | * Configure the LCD DMA according to the current mode specified by parameters | |
173 | * in lcdc.fbdev and fbdev->var. | |
174 | */ | |
175 | static void setup_lcd_dma(void) | |
176 | { | |
177 | static const int dma_elem_type[] = { | |
178 | 0, | |
179 | OMAP_DMA_DATA_TYPE_S8, | |
180 | OMAP_DMA_DATA_TYPE_S16, | |
181 | 0, | |
182 | OMAP_DMA_DATA_TYPE_S32, | |
183 | }; | |
184 | struct omapfb_plane_struct *plane = lcdc.fbdev->fb_info[0]->par; | |
185 | struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var; | |
186 | unsigned long src; | |
187 | int esize, xelem, yelem; | |
188 | ||
189 | src = lcdc.vram_phys + lcdc.frame_offset; | |
190 | ||
191 | switch (var->rotate) { | |
192 | case 0: | |
193 | if (plane->info.mirror || (src & 3) || | |
194 | lcdc.color_mode == OMAPFB_COLOR_YUV420 || | |
195 | (lcdc.xres & 1)) | |
196 | esize = 2; | |
197 | else | |
198 | esize = 4; | |
199 | xelem = lcdc.xres * lcdc.bpp / 8 / esize; | |
200 | yelem = lcdc.yres; | |
201 | break; | |
202 | case 90: | |
203 | case 180: | |
204 | case 270: | |
205 | if (cpu_is_omap15xx()) { | |
206 | BUG(); | |
207 | } | |
208 | esize = 2; | |
209 | xelem = lcdc.yres * lcdc.bpp / 16; | |
210 | yelem = lcdc.xres; | |
211 | break; | |
212 | default: | |
213 | BUG(); | |
214 | return; | |
215 | } | |
216 | #ifdef VERBOSE | |
217 | dev_dbg(lcdc.fbdev->dev, | |
218 | "setup_dma: src %#010lx esize %d xelem %d yelem %d\n", | |
219 | src, esize, xelem, yelem); | |
220 | #endif | |
221 | omap_set_lcd_dma_b1(src, xelem, yelem, dma_elem_type[esize]); | |
222 | if (!cpu_is_omap15xx()) { | |
223 | int bpp = lcdc.bpp; | |
224 | ||
225 | /* | |
226 | * YUV support is only for external mode when we have the | |
227 | * YUV window embedded in a 16bpp frame buffer. | |
228 | */ | |
229 | if (lcdc.color_mode == OMAPFB_COLOR_YUV420) | |
230 | bpp = 16; | |
231 | /* Set virtual xres elem size */ | |
232 | omap_set_lcd_dma_b1_vxres( | |
233 | lcdc.screen_width * bpp / 8 / esize); | |
234 | /* Setup transformations */ | |
235 | omap_set_lcd_dma_b1_rotation(var->rotate); | |
236 | omap_set_lcd_dma_b1_mirror(plane->info.mirror); | |
237 | } | |
238 | omap_setup_lcd_dma(); | |
239 | } | |
240 | ||
241 | static irqreturn_t lcdc_irq_handler(int irq, void *dev_id) | |
242 | { | |
243 | u32 status; | |
244 | ||
245 | status = omap_readl(OMAP_LCDC_STATUS); | |
246 | ||
247 | if (status & (OMAP_LCDC_STAT_FUF | OMAP_LCDC_STAT_SYNC_LOST)) | |
248 | reset_controller(status); | |
249 | else { | |
250 | if (status & OMAP_LCDC_STAT_DONE) { | |
251 | u32 l; | |
252 | ||
253 | /* | |
254 | * Disable IRQ_DONE. The status bit will be cleared | |
255 | * only when the controller is reenabled and we don't | |
256 | * want to get more interrupts. | |
257 | */ | |
258 | l = omap_readl(OMAP_LCDC_CONTROL); | |
259 | l &= ~OMAP_LCDC_IRQ_DONE; | |
260 | omap_writel(l, OMAP_LCDC_CONTROL); | |
261 | complete(&lcdc.last_frame_complete); | |
262 | } | |
263 | if (status & OMAP_LCDC_STAT_LOADED_PALETTE) { | |
264 | disable_controller_async(); | |
265 | complete(&lcdc.palette_load_complete); | |
266 | } | |
267 | } | |
268 | ||
269 | /* | |
270 | * Clear these interrupt status bits. | |
271 | * Sync_lost, FUF bits were cleared by disabling the LCD controller | |
272 | * LOADED_PALETTE can be cleared this way only in palette only | |
273 | * load mode. In other load modes it's cleared by disabling the | |
274 | * controller. | |
275 | */ | |
276 | status &= ~(OMAP_LCDC_STAT_VSYNC | | |
277 | OMAP_LCDC_STAT_LOADED_PALETTE | | |
278 | OMAP_LCDC_STAT_ABC | | |
279 | OMAP_LCDC_STAT_LINE_INT); | |
280 | omap_writel(status, OMAP_LCDC_STATUS); | |
281 | return IRQ_HANDLED; | |
282 | } | |
283 | ||
284 | /* | |
285 | * Change to a new video mode. We defer this to a later time to avoid any | |
286 | * flicker and not to mess up the current LCD DMA context. For this we disable | |
44363f14 | 287 | * the LCD controller, which will generate a DONE irq after the last frame has |
569755c7 ID |
288 | * been transferred. Then it'll be safe to reconfigure both the LCD controller |
289 | * as well as the LCD DMA. | |
290 | */ | |
291 | static int omap_lcdc_setup_plane(int plane, int channel_out, | |
292 | unsigned long offset, int screen_width, | |
293 | int pos_x, int pos_y, int width, int height, | |
294 | int color_mode) | |
295 | { | |
296 | struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var; | |
297 | struct lcd_panel *panel = lcdc.fbdev->panel; | |
298 | int rot_x, rot_y; | |
299 | ||
300 | if (var->rotate == 0) { | |
301 | rot_x = panel->x_res; | |
302 | rot_y = panel->y_res; | |
303 | } else { | |
304 | rot_x = panel->y_res; | |
305 | rot_y = panel->x_res; | |
306 | } | |
307 | if (plane != 0 || channel_out != 0 || pos_x != 0 || pos_y != 0 || | |
308 | width > rot_x || height > rot_y) { | |
309 | #ifdef VERBOSE | |
310 | dev_dbg(lcdc.fbdev->dev, | |
311 | "invalid plane params plane %d pos_x %d pos_y %d " | |
312 | "w %d h %d\n", plane, pos_x, pos_y, width, height); | |
313 | #endif | |
314 | return -EINVAL; | |
315 | } | |
316 | ||
317 | lcdc.frame_offset = offset; | |
318 | lcdc.xres = width; | |
319 | lcdc.yres = height; | |
320 | lcdc.screen_width = screen_width; | |
321 | lcdc.color_mode = color_mode; | |
322 | ||
323 | switch (color_mode) { | |
324 | case OMAPFB_COLOR_CLUT_8BPP: | |
325 | lcdc.bpp = 8; | |
326 | lcdc.palette_code = 0x3000; | |
327 | lcdc.palette_size = 512; | |
328 | break; | |
329 | case OMAPFB_COLOR_RGB565: | |
330 | lcdc.bpp = 16; | |
331 | lcdc.palette_code = 0x4000; | |
332 | lcdc.palette_size = 32; | |
333 | break; | |
334 | case OMAPFB_COLOR_RGB444: | |
335 | lcdc.bpp = 16; | |
336 | lcdc.palette_code = 0x4000; | |
337 | lcdc.palette_size = 32; | |
338 | break; | |
339 | case OMAPFB_COLOR_YUV420: | |
340 | if (lcdc.ext_mode) { | |
341 | lcdc.bpp = 12; | |
342 | break; | |
343 | } | |
344 | /* fallthrough */ | |
345 | case OMAPFB_COLOR_YUV422: | |
346 | if (lcdc.ext_mode) { | |
347 | lcdc.bpp = 16; | |
348 | break; | |
349 | } | |
350 | /* fallthrough */ | |
351 | default: | |
352 | /* FIXME: other BPPs. | |
353 | * bpp1: code 0, size 256 | |
354 | * bpp2: code 0x1000 size 256 | |
355 | * bpp4: code 0x2000 size 256 | |
356 | * bpp12: code 0x4000 size 32 | |
357 | */ | |
358 | dev_dbg(lcdc.fbdev->dev, "invalid color mode %d\n", color_mode); | |
359 | BUG(); | |
360 | return -1; | |
361 | } | |
362 | ||
363 | if (lcdc.ext_mode) { | |
364 | setup_lcd_dma(); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { | |
369 | disable_controller(); | |
370 | omap_stop_lcd_dma(); | |
371 | setup_lcd_dma(); | |
372 | enable_controller(); | |
373 | } | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
378 | static int omap_lcdc_enable_plane(int plane, int enable) | |
379 | { | |
380 | dev_dbg(lcdc.fbdev->dev, | |
381 | "plane %d enable %d update_mode %d ext_mode %d\n", | |
382 | plane, enable, lcdc.update_mode, lcdc.ext_mode); | |
383 | if (plane != OMAPFB_PLANE_GFX) | |
384 | return -EINVAL; | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | /* | |
390 | * Configure the LCD DMA for a palette load operation and do the palette | |
391 | * downloading synchronously. We don't use the frame+palette load mode of | |
3ad2f3fb | 392 | * the controller, since the palette can always be downloaded separately. |
569755c7 ID |
393 | */ |
394 | static void load_palette(void) | |
395 | { | |
396 | u16 *palette; | |
397 | ||
398 | palette = (u16 *)lcdc.palette_virt; | |
399 | ||
400 | *(u16 *)palette &= 0x0fff; | |
401 | *(u16 *)palette |= lcdc.palette_code; | |
402 | ||
403 | omap_set_lcd_dma_b1(lcdc.palette_phys, | |
404 | lcdc.palette_size / 4 + 1, 1, OMAP_DMA_DATA_TYPE_S32); | |
405 | ||
406 | omap_set_lcd_dma_single_transfer(1); | |
407 | omap_setup_lcd_dma(); | |
408 | ||
409 | init_completion(&lcdc.palette_load_complete); | |
410 | enable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE); | |
411 | set_load_mode(OMAP_LCDC_LOAD_PALETTE); | |
412 | enable_controller(); | |
413 | if (!wait_for_completion_timeout(&lcdc.palette_load_complete, | |
414 | msecs_to_jiffies(500))) | |
415 | dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n"); | |
416 | /* The controller gets disabled in the irq handler */ | |
417 | disable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE); | |
418 | omap_stop_lcd_dma(); | |
419 | ||
420 | omap_set_lcd_dma_single_transfer(lcdc.ext_mode); | |
421 | } | |
422 | ||
423 | /* Used only in internal controller mode */ | |
424 | static int omap_lcdc_setcolreg(u_int regno, u16 red, u16 green, u16 blue, | |
425 | u16 transp, int update_hw_pal) | |
426 | { | |
427 | u16 *palette; | |
428 | ||
429 | if (lcdc.color_mode != OMAPFB_COLOR_CLUT_8BPP || regno > 255) | |
430 | return -EINVAL; | |
431 | ||
432 | palette = (u16 *)lcdc.palette_virt; | |
433 | ||
434 | palette[regno] &= ~0x0fff; | |
435 | palette[regno] |= ((red >> 12) << 8) | ((green >> 12) << 4 ) | | |
436 | (blue >> 12); | |
437 | ||
438 | if (update_hw_pal) { | |
439 | disable_controller(); | |
440 | omap_stop_lcd_dma(); | |
441 | load_palette(); | |
442 | setup_lcd_dma(); | |
443 | set_load_mode(OMAP_LCDC_LOAD_FRAME); | |
444 | enable_controller(); | |
445 | } | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | static void calc_ck_div(int is_tft, int pck, int *pck_div) | |
451 | { | |
452 | unsigned long lck; | |
453 | ||
454 | pck = max(1, pck); | |
455 | lck = clk_get_rate(lcdc.lcd_ck); | |
456 | *pck_div = (lck + pck - 1) / pck; | |
457 | if (is_tft) | |
458 | *pck_div = max(2, *pck_div); | |
459 | else | |
460 | *pck_div = max(3, *pck_div); | |
461 | if (*pck_div > 255) { | |
462 | /* FIXME: try to adjust logic clock divider as well */ | |
463 | *pck_div = 255; | |
464 | dev_warn(lcdc.fbdev->dev, "pixclock %d kHz too low.\n", | |
465 | pck / 1000); | |
466 | } | |
467 | } | |
468 | ||
469 | static void inline setup_regs(void) | |
470 | { | |
471 | u32 l; | |
472 | struct lcd_panel *panel = lcdc.fbdev->panel; | |
473 | int is_tft = panel->config & OMAP_LCDC_PANEL_TFT; | |
474 | unsigned long lck; | |
475 | int pcd; | |
476 | ||
477 | l = omap_readl(OMAP_LCDC_CONTROL); | |
478 | l &= ~OMAP_LCDC_CTRL_LCD_TFT; | |
479 | l |= is_tft ? OMAP_LCDC_CTRL_LCD_TFT : 0; | |
480 | #ifdef CONFIG_MACH_OMAP_PALMTE | |
481 | /* FIXME:if (machine_is_omap_palmte()) { */ | |
482 | /* PalmTE uses alternate TFT setting in 8BPP mode */ | |
483 | l |= (is_tft && panel->bpp == 8) ? 0x810000 : 0; | |
484 | /* } */ | |
485 | #endif | |
486 | omap_writel(l, OMAP_LCDC_CONTROL); | |
487 | ||
488 | l = omap_readl(OMAP_LCDC_TIMING2); | |
489 | l &= ~(((1 << 6) - 1) << 20); | |
490 | l |= (panel->config & OMAP_LCDC_SIGNAL_MASK) << 20; | |
491 | omap_writel(l, OMAP_LCDC_TIMING2); | |
492 | ||
493 | l = panel->x_res - 1; | |
494 | l |= (panel->hsw - 1) << 10; | |
495 | l |= (panel->hfp - 1) << 16; | |
496 | l |= (panel->hbp - 1) << 24; | |
497 | omap_writel(l, OMAP_LCDC_TIMING0); | |
498 | ||
499 | l = panel->y_res - 1; | |
500 | l |= (panel->vsw - 1) << 10; | |
501 | l |= panel->vfp << 16; | |
502 | l |= panel->vbp << 24; | |
503 | omap_writel(l, OMAP_LCDC_TIMING1); | |
504 | ||
505 | l = omap_readl(OMAP_LCDC_TIMING2); | |
506 | l &= ~0xff; | |
507 | ||
508 | lck = clk_get_rate(lcdc.lcd_ck); | |
509 | ||
510 | if (!panel->pcd) | |
511 | calc_ck_div(is_tft, panel->pixel_clock * 1000, &pcd); | |
512 | else { | |
513 | dev_warn(lcdc.fbdev->dev, | |
514 | "Pixel clock divider value is obsolete.\n" | |
515 | "Try to set pixel_clock to %lu and pcd to 0 " | |
516 | "in drivers/video/omap/lcd_%s.c and submit a patch.\n", | |
517 | lck / panel->pcd / 1000, panel->name); | |
518 | ||
519 | pcd = panel->pcd; | |
520 | } | |
521 | l |= pcd & 0xff; | |
522 | l |= panel->acb << 8; | |
523 | omap_writel(l, OMAP_LCDC_TIMING2); | |
524 | ||
525 | /* update panel info with the exact clock */ | |
526 | panel->pixel_clock = lck / pcd / 1000; | |
527 | } | |
528 | ||
529 | /* | |
530 | * Configure the LCD controller, download the color palette and start a looped | |
531 | * DMA transfer of the frame image data. Called only in internal | |
532 | * controller mode. | |
533 | */ | |
534 | static int omap_lcdc_set_update_mode(enum omapfb_update_mode mode) | |
535 | { | |
536 | int r = 0; | |
537 | ||
538 | if (mode != lcdc.update_mode) { | |
539 | switch (mode) { | |
540 | case OMAPFB_AUTO_UPDATE: | |
541 | setup_regs(); | |
542 | load_palette(); | |
543 | ||
544 | /* Setup and start LCD DMA */ | |
545 | setup_lcd_dma(); | |
546 | ||
547 | set_load_mode(OMAP_LCDC_LOAD_FRAME); | |
548 | enable_irqs(OMAP_LCDC_IRQ_DONE); | |
549 | /* This will start the actual DMA transfer */ | |
550 | enable_controller(); | |
551 | lcdc.update_mode = mode; | |
552 | break; | |
553 | case OMAPFB_UPDATE_DISABLED: | |
554 | disable_controller(); | |
555 | omap_stop_lcd_dma(); | |
556 | lcdc.update_mode = mode; | |
557 | break; | |
558 | default: | |
559 | r = -EINVAL; | |
560 | } | |
561 | } | |
562 | ||
563 | return r; | |
564 | } | |
565 | ||
566 | static enum omapfb_update_mode omap_lcdc_get_update_mode(void) | |
567 | { | |
568 | return lcdc.update_mode; | |
569 | } | |
570 | ||
571 | /* PM code called only in internal controller mode */ | |
572 | static void omap_lcdc_suspend(void) | |
573 | { | |
574 | if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { | |
575 | disable_controller(); | |
576 | omap_stop_lcd_dma(); | |
577 | } | |
578 | } | |
579 | ||
580 | static void omap_lcdc_resume(void) | |
581 | { | |
582 | if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { | |
583 | setup_regs(); | |
584 | load_palette(); | |
585 | setup_lcd_dma(); | |
586 | set_load_mode(OMAP_LCDC_LOAD_FRAME); | |
587 | enable_irqs(OMAP_LCDC_IRQ_DONE); | |
588 | enable_controller(); | |
589 | } | |
590 | } | |
591 | ||
592 | static void omap_lcdc_get_caps(int plane, struct omapfb_caps *caps) | |
593 | { | |
594 | return; | |
595 | } | |
596 | ||
597 | int omap_lcdc_set_dma_callback(void (*callback)(void *data), void *data) | |
598 | { | |
599 | BUG_ON(callback == NULL); | |
600 | ||
601 | if (lcdc.dma_callback) | |
602 | return -EBUSY; | |
603 | else { | |
604 | lcdc.dma_callback = callback; | |
605 | lcdc.dma_callback_data = data; | |
606 | } | |
607 | return 0; | |
608 | } | |
609 | EXPORT_SYMBOL(omap_lcdc_set_dma_callback); | |
610 | ||
611 | void omap_lcdc_free_dma_callback(void) | |
612 | { | |
613 | lcdc.dma_callback = NULL; | |
614 | } | |
615 | EXPORT_SYMBOL(omap_lcdc_free_dma_callback); | |
616 | ||
617 | static void lcdc_dma_handler(u16 status, void *data) | |
618 | { | |
619 | if (lcdc.dma_callback) | |
620 | lcdc.dma_callback(lcdc.dma_callback_data); | |
621 | } | |
622 | ||
623 | static int mmap_kern(void) | |
624 | { | |
625 | struct vm_struct *kvma; | |
626 | struct vm_area_struct vma; | |
627 | pgprot_t pgprot; | |
628 | unsigned long vaddr; | |
629 | ||
630 | kvma = get_vm_area(lcdc.vram_size, VM_IOREMAP); | |
631 | if (kvma == NULL) { | |
632 | dev_err(lcdc.fbdev->dev, "can't get kernel vm area\n"); | |
633 | return -ENOMEM; | |
634 | } | |
635 | vma.vm_mm = &init_mm; | |
636 | ||
637 | vaddr = (unsigned long)kvma->addr; | |
638 | vma.vm_start = vaddr; | |
639 | vma.vm_end = vaddr + lcdc.vram_size; | |
640 | ||
641 | pgprot = pgprot_writecombine(pgprot_kernel); | |
642 | if (io_remap_pfn_range(&vma, vaddr, | |
643 | lcdc.vram_phys >> PAGE_SHIFT, | |
644 | lcdc.vram_size, pgprot) < 0) { | |
645 | dev_err(lcdc.fbdev->dev, "kernel mmap for FB memory failed\n"); | |
646 | return -EAGAIN; | |
647 | } | |
648 | ||
649 | lcdc.vram_virt = (void *)vaddr; | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | static void unmap_kern(void) | |
655 | { | |
656 | vunmap(lcdc.vram_virt); | |
657 | } | |
658 | ||
659 | static int alloc_palette_ram(void) | |
660 | { | |
661 | lcdc.palette_virt = dma_alloc_writecombine(lcdc.fbdev->dev, | |
662 | MAX_PALETTE_SIZE, &lcdc.palette_phys, GFP_KERNEL); | |
663 | if (lcdc.palette_virt == NULL) { | |
664 | dev_err(lcdc.fbdev->dev, "failed to alloc palette memory\n"); | |
665 | return -ENOMEM; | |
666 | } | |
667 | memset(lcdc.palette_virt, 0, MAX_PALETTE_SIZE); | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | static void free_palette_ram(void) | |
673 | { | |
674 | dma_free_writecombine(lcdc.fbdev->dev, MAX_PALETTE_SIZE, | |
675 | lcdc.palette_virt, lcdc.palette_phys); | |
676 | } | |
677 | ||
678 | static int alloc_fbmem(struct omapfb_mem_region *region) | |
679 | { | |
680 | int bpp; | |
681 | int frame_size; | |
682 | struct lcd_panel *panel = lcdc.fbdev->panel; | |
683 | ||
684 | bpp = panel->bpp; | |
685 | if (bpp == 12) | |
686 | bpp = 16; | |
687 | frame_size = PAGE_ALIGN(panel->x_res * bpp / 8 * panel->y_res); | |
688 | if (region->size > frame_size) | |
689 | frame_size = region->size; | |
690 | lcdc.vram_size = frame_size; | |
691 | lcdc.vram_virt = dma_alloc_writecombine(lcdc.fbdev->dev, | |
692 | lcdc.vram_size, &lcdc.vram_phys, GFP_KERNEL); | |
693 | if (lcdc.vram_virt == NULL) { | |
694 | dev_err(lcdc.fbdev->dev, "unable to allocate FB DMA memory\n"); | |
695 | return -ENOMEM; | |
696 | } | |
697 | region->size = frame_size; | |
698 | region->paddr = lcdc.vram_phys; | |
699 | region->vaddr = lcdc.vram_virt; | |
700 | region->alloc = 1; | |
701 | ||
702 | memset(lcdc.vram_virt, 0, lcdc.vram_size); | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
707 | static void free_fbmem(void) | |
708 | { | |
709 | dma_free_writecombine(lcdc.fbdev->dev, lcdc.vram_size, | |
710 | lcdc.vram_virt, lcdc.vram_phys); | |
711 | } | |
712 | ||
713 | static int setup_fbmem(struct omapfb_mem_desc *req_md) | |
714 | { | |
715 | int r; | |
716 | ||
717 | if (!req_md->region_cnt) { | |
718 | dev_err(lcdc.fbdev->dev, "no memory regions defined\n"); | |
719 | return -EINVAL; | |
720 | } | |
721 | ||
722 | if (req_md->region_cnt > 1) { | |
723 | dev_err(lcdc.fbdev->dev, "only one plane is supported\n"); | |
724 | req_md->region_cnt = 1; | |
725 | } | |
726 | ||
727 | if (req_md->region[0].paddr == 0) { | |
728 | lcdc.fbmem_allocated = 1; | |
729 | if ((r = alloc_fbmem(&req_md->region[0])) < 0) | |
730 | return r; | |
731 | return 0; | |
732 | } | |
733 | ||
734 | lcdc.vram_phys = req_md->region[0].paddr; | |
735 | lcdc.vram_size = req_md->region[0].size; | |
736 | ||
737 | if ((r = mmap_kern()) < 0) | |
738 | return r; | |
739 | ||
740 | dev_dbg(lcdc.fbdev->dev, "vram at %08x size %08lx mapped to 0x%p\n", | |
741 | lcdc.vram_phys, lcdc.vram_size, lcdc.vram_virt); | |
742 | ||
743 | return 0; | |
744 | } | |
745 | ||
746 | static void cleanup_fbmem(void) | |
747 | { | |
748 | if (lcdc.fbmem_allocated) | |
749 | free_fbmem(); | |
750 | else | |
751 | unmap_kern(); | |
752 | } | |
753 | ||
754 | static int omap_lcdc_init(struct omapfb_device *fbdev, int ext_mode, | |
755 | struct omapfb_mem_desc *req_vram) | |
756 | { | |
757 | int r; | |
758 | u32 l; | |
759 | int rate; | |
760 | struct clk *tc_ck; | |
761 | ||
762 | lcdc.irq_mask = 0; | |
763 | ||
764 | lcdc.fbdev = fbdev; | |
765 | lcdc.ext_mode = ext_mode; | |
766 | ||
767 | l = 0; | |
768 | omap_writel(l, OMAP_LCDC_CONTROL); | |
769 | ||
770 | /* FIXME: | |
771 | * According to errata some platforms have a clock rate limitiation | |
772 | */ | |
953a7e84 | 773 | lcdc.lcd_ck = clk_get(fbdev->dev, "lcd_ck"); |
569755c7 ID |
774 | if (IS_ERR(lcdc.lcd_ck)) { |
775 | dev_err(fbdev->dev, "unable to access LCD clock\n"); | |
776 | r = PTR_ERR(lcdc.lcd_ck); | |
777 | goto fail0; | |
778 | } | |
779 | ||
953a7e84 | 780 | tc_ck = clk_get(fbdev->dev, "tc_ck"); |
569755c7 ID |
781 | if (IS_ERR(tc_ck)) { |
782 | dev_err(fbdev->dev, "unable to access TC clock\n"); | |
783 | r = PTR_ERR(tc_ck); | |
784 | goto fail1; | |
785 | } | |
786 | ||
787 | rate = clk_get_rate(tc_ck); | |
788 | clk_put(tc_ck); | |
789 | ||
790 | if (machine_is_ams_delta()) | |
791 | rate /= 4; | |
792 | if (machine_is_omap_h3()) | |
793 | rate /= 3; | |
794 | r = clk_set_rate(lcdc.lcd_ck, rate); | |
795 | if (r) { | |
796 | dev_err(fbdev->dev, "failed to adjust LCD rate\n"); | |
797 | goto fail1; | |
798 | } | |
799 | clk_enable(lcdc.lcd_ck); | |
800 | ||
801 | r = request_irq(OMAP_LCDC_IRQ, lcdc_irq_handler, 0, MODULE_NAME, fbdev); | |
802 | if (r) { | |
803 | dev_err(fbdev->dev, "unable to get IRQ\n"); | |
804 | goto fail2; | |
805 | } | |
806 | ||
807 | r = omap_request_lcd_dma(lcdc_dma_handler, NULL); | |
808 | if (r) { | |
809 | dev_err(fbdev->dev, "unable to get LCD DMA\n"); | |
810 | goto fail3; | |
811 | } | |
812 | ||
813 | omap_set_lcd_dma_single_transfer(ext_mode); | |
814 | omap_set_lcd_dma_ext_controller(ext_mode); | |
815 | ||
816 | if (!ext_mode) | |
817 | if ((r = alloc_palette_ram()) < 0) | |
818 | goto fail4; | |
819 | ||
820 | if ((r = setup_fbmem(req_vram)) < 0) | |
821 | goto fail5; | |
822 | ||
823 | pr_info("omapfb: LCDC initialized\n"); | |
824 | ||
825 | return 0; | |
826 | fail5: | |
827 | if (!ext_mode) | |
828 | free_palette_ram(); | |
829 | fail4: | |
830 | omap_free_lcd_dma(); | |
831 | fail3: | |
832 | free_irq(OMAP_LCDC_IRQ, lcdc.fbdev); | |
833 | fail2: | |
834 | clk_disable(lcdc.lcd_ck); | |
835 | fail1: | |
836 | clk_put(lcdc.lcd_ck); | |
837 | fail0: | |
838 | return r; | |
839 | } | |
840 | ||
841 | static void omap_lcdc_cleanup(void) | |
842 | { | |
843 | if (!lcdc.ext_mode) | |
844 | free_palette_ram(); | |
845 | cleanup_fbmem(); | |
846 | omap_free_lcd_dma(); | |
847 | free_irq(OMAP_LCDC_IRQ, lcdc.fbdev); | |
848 | clk_disable(lcdc.lcd_ck); | |
849 | clk_put(lcdc.lcd_ck); | |
850 | } | |
851 | ||
852 | const struct lcd_ctrl omap1_int_ctrl = { | |
853 | .name = "internal", | |
854 | .init = omap_lcdc_init, | |
855 | .cleanup = omap_lcdc_cleanup, | |
856 | .get_caps = omap_lcdc_get_caps, | |
857 | .set_update_mode = omap_lcdc_set_update_mode, | |
858 | .get_update_mode = omap_lcdc_get_update_mode, | |
859 | .update_window = NULL, | |
860 | .suspend = omap_lcdc_suspend, | |
861 | .resume = omap_lcdc_resume, | |
862 | .setup_plane = omap_lcdc_setup_plane, | |
863 | .enable_plane = omap_lcdc_enable_plane, | |
864 | .setcolreg = omap_lcdc_setcolreg, | |
865 | }; |