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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
569755c7 ID |
2 | /* |
3 | * OMAP1 internal LCD controller | |
4 | * | |
5 | * Copyright (C) 2004 Nokia Corporation | |
6 | * Author: Imre Deak <imre.deak@nokia.com> | |
569755c7 ID |
7 | */ |
8 | #include <linux/module.h> | |
9 | #include <linux/device.h> | |
10 | #include <linux/interrupt.h> | |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/err.h> | |
13 | #include <linux/mm.h> | |
14 | #include <linux/fb.h> | |
15 | #include <linux/dma-mapping.h> | |
16 | #include <linux/vmalloc.h> | |
17 | #include <linux/clk.h> | |
5a0e3ad6 | 18 | #include <linux/gfp.h> |
569755c7 | 19 | |
8d72c796 | 20 | #include <mach/lcdc.h> |
45c3eb7d | 21 | #include <linux/omap-dma.h> |
569755c7 ID |
22 | |
23 | #include <asm/mach-types.h> | |
24 | ||
91773a00 TV |
25 | #include "omapfb.h" |
26 | ||
7c8ad982 RK |
27 | #include "lcdc.h" |
28 | ||
569755c7 ID |
29 | #define MODULE_NAME "lcdc" |
30 | ||
569755c7 ID |
31 | #define MAX_PALETTE_SIZE PAGE_SIZE |
32 | ||
33 | enum lcdc_load_mode { | |
34 | OMAP_LCDC_LOAD_PALETTE, | |
35 | OMAP_LCDC_LOAD_FRAME, | |
36 | OMAP_LCDC_LOAD_PALETTE_AND_FRAME | |
37 | }; | |
38 | ||
39 | static struct omap_lcd_controller { | |
40 | enum omapfb_update_mode update_mode; | |
41 | int ext_mode; | |
42 | ||
43 | unsigned long frame_offset; | |
44 | int screen_width; | |
45 | int xres; | |
46 | int yres; | |
47 | ||
48 | enum omapfb_color_format color_mode; | |
49 | int bpp; | |
50 | void *palette_virt; | |
51 | dma_addr_t palette_phys; | |
52 | int palette_code; | |
53 | int palette_size; | |
54 | ||
55 | unsigned int irq_mask; | |
56 | struct completion last_frame_complete; | |
57 | struct completion palette_load_complete; | |
58 | struct clk *lcd_ck; | |
59 | struct omapfb_device *fbdev; | |
60 | ||
61 | void (*dma_callback)(void *data); | |
62 | void *dma_callback_data; | |
63 | ||
569755c7 ID |
64 | dma_addr_t vram_phys; |
65 | void *vram_virt; | |
66 | unsigned long vram_size; | |
67 | } lcdc; | |
68 | ||
ba168a46 | 69 | static inline void enable_irqs(int mask) |
569755c7 ID |
70 | { |
71 | lcdc.irq_mask |= mask; | |
72 | } | |
73 | ||
ba168a46 | 74 | static inline void disable_irqs(int mask) |
569755c7 ID |
75 | { |
76 | lcdc.irq_mask &= ~mask; | |
77 | } | |
78 | ||
79 | static void set_load_mode(enum lcdc_load_mode mode) | |
80 | { | |
81 | u32 l; | |
82 | ||
83 | l = omap_readl(OMAP_LCDC_CONTROL); | |
84 | l &= ~(3 << 20); | |
85 | switch (mode) { | |
86 | case OMAP_LCDC_LOAD_PALETTE: | |
87 | l |= 1 << 20; | |
88 | break; | |
89 | case OMAP_LCDC_LOAD_FRAME: | |
90 | l |= 2 << 20; | |
91 | break; | |
92 | case OMAP_LCDC_LOAD_PALETTE_AND_FRAME: | |
93 | break; | |
94 | default: | |
95 | BUG(); | |
96 | } | |
97 | omap_writel(l, OMAP_LCDC_CONTROL); | |
98 | } | |
99 | ||
100 | static void enable_controller(void) | |
101 | { | |
102 | u32 l; | |
103 | ||
104 | l = omap_readl(OMAP_LCDC_CONTROL); | |
105 | l |= OMAP_LCDC_CTRL_LCD_EN; | |
106 | l &= ~OMAP_LCDC_IRQ_MASK; | |
107 | l |= lcdc.irq_mask | OMAP_LCDC_IRQ_DONE; /* enabled IRQs */ | |
108 | omap_writel(l, OMAP_LCDC_CONTROL); | |
109 | } | |
110 | ||
111 | static void disable_controller_async(void) | |
112 | { | |
113 | u32 l; | |
114 | u32 mask; | |
115 | ||
116 | l = omap_readl(OMAP_LCDC_CONTROL); | |
117 | mask = OMAP_LCDC_CTRL_LCD_EN | OMAP_LCDC_IRQ_MASK; | |
118 | /* | |
119 | * Preserve the DONE mask, since we still want to get the | |
120 | * final DONE irq. It will be disabled in the IRQ handler. | |
121 | */ | |
122 | mask &= ~OMAP_LCDC_IRQ_DONE; | |
123 | l &= ~mask; | |
124 | omap_writel(l, OMAP_LCDC_CONTROL); | |
125 | } | |
126 | ||
127 | static void disable_controller(void) | |
128 | { | |
129 | init_completion(&lcdc.last_frame_complete); | |
130 | disable_controller_async(); | |
131 | if (!wait_for_completion_timeout(&lcdc.last_frame_complete, | |
132 | msecs_to_jiffies(500))) | |
133 | dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n"); | |
134 | } | |
135 | ||
136 | static void reset_controller(u32 status) | |
137 | { | |
138 | static unsigned long reset_count; | |
139 | static unsigned long last_jiffies; | |
140 | ||
141 | disable_controller_async(); | |
142 | reset_count++; | |
143 | if (reset_count == 1 || time_after(jiffies, last_jiffies + HZ)) { | |
144 | dev_err(lcdc.fbdev->dev, | |
145 | "resetting (status %#010x,reset count %lu)\n", | |
146 | status, reset_count); | |
147 | last_jiffies = jiffies; | |
148 | } | |
149 | if (reset_count < 100) { | |
150 | enable_controller(); | |
151 | } else { | |
152 | reset_count = 0; | |
153 | dev_err(lcdc.fbdev->dev, | |
154 | "too many reset attempts, giving up.\n"); | |
155 | } | |
156 | } | |
157 | ||
158 | /* | |
159 | * Configure the LCD DMA according to the current mode specified by parameters | |
160 | * in lcdc.fbdev and fbdev->var. | |
161 | */ | |
162 | static void setup_lcd_dma(void) | |
163 | { | |
164 | static const int dma_elem_type[] = { | |
165 | 0, | |
166 | OMAP_DMA_DATA_TYPE_S8, | |
167 | OMAP_DMA_DATA_TYPE_S16, | |
168 | 0, | |
169 | OMAP_DMA_DATA_TYPE_S32, | |
170 | }; | |
171 | struct omapfb_plane_struct *plane = lcdc.fbdev->fb_info[0]->par; | |
172 | struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var; | |
173 | unsigned long src; | |
174 | int esize, xelem, yelem; | |
175 | ||
176 | src = lcdc.vram_phys + lcdc.frame_offset; | |
177 | ||
178 | switch (var->rotate) { | |
179 | case 0: | |
180 | if (plane->info.mirror || (src & 3) || | |
181 | lcdc.color_mode == OMAPFB_COLOR_YUV420 || | |
182 | (lcdc.xres & 1)) | |
183 | esize = 2; | |
184 | else | |
185 | esize = 4; | |
186 | xelem = lcdc.xres * lcdc.bpp / 8 / esize; | |
187 | yelem = lcdc.yres; | |
188 | break; | |
189 | case 90: | |
190 | case 180: | |
191 | case 270: | |
192 | if (cpu_is_omap15xx()) { | |
193 | BUG(); | |
194 | } | |
195 | esize = 2; | |
196 | xelem = lcdc.yres * lcdc.bpp / 16; | |
197 | yelem = lcdc.xres; | |
198 | break; | |
199 | default: | |
200 | BUG(); | |
201 | return; | |
202 | } | |
203 | #ifdef VERBOSE | |
204 | dev_dbg(lcdc.fbdev->dev, | |
205 | "setup_dma: src %#010lx esize %d xelem %d yelem %d\n", | |
206 | src, esize, xelem, yelem); | |
207 | #endif | |
208 | omap_set_lcd_dma_b1(src, xelem, yelem, dma_elem_type[esize]); | |
209 | if (!cpu_is_omap15xx()) { | |
210 | int bpp = lcdc.bpp; | |
211 | ||
212 | /* | |
213 | * YUV support is only for external mode when we have the | |
214 | * YUV window embedded in a 16bpp frame buffer. | |
215 | */ | |
216 | if (lcdc.color_mode == OMAPFB_COLOR_YUV420) | |
217 | bpp = 16; | |
218 | /* Set virtual xres elem size */ | |
219 | omap_set_lcd_dma_b1_vxres( | |
220 | lcdc.screen_width * bpp / 8 / esize); | |
221 | /* Setup transformations */ | |
222 | omap_set_lcd_dma_b1_rotation(var->rotate); | |
223 | omap_set_lcd_dma_b1_mirror(plane->info.mirror); | |
224 | } | |
225 | omap_setup_lcd_dma(); | |
226 | } | |
227 | ||
228 | static irqreturn_t lcdc_irq_handler(int irq, void *dev_id) | |
229 | { | |
230 | u32 status; | |
231 | ||
232 | status = omap_readl(OMAP_LCDC_STATUS); | |
233 | ||
234 | if (status & (OMAP_LCDC_STAT_FUF | OMAP_LCDC_STAT_SYNC_LOST)) | |
235 | reset_controller(status); | |
236 | else { | |
237 | if (status & OMAP_LCDC_STAT_DONE) { | |
238 | u32 l; | |
239 | ||
240 | /* | |
241 | * Disable IRQ_DONE. The status bit will be cleared | |
242 | * only when the controller is reenabled and we don't | |
243 | * want to get more interrupts. | |
244 | */ | |
245 | l = omap_readl(OMAP_LCDC_CONTROL); | |
246 | l &= ~OMAP_LCDC_IRQ_DONE; | |
247 | omap_writel(l, OMAP_LCDC_CONTROL); | |
248 | complete(&lcdc.last_frame_complete); | |
249 | } | |
250 | if (status & OMAP_LCDC_STAT_LOADED_PALETTE) { | |
251 | disable_controller_async(); | |
252 | complete(&lcdc.palette_load_complete); | |
253 | } | |
254 | } | |
255 | ||
256 | /* | |
257 | * Clear these interrupt status bits. | |
258 | * Sync_lost, FUF bits were cleared by disabling the LCD controller | |
259 | * LOADED_PALETTE can be cleared this way only in palette only | |
260 | * load mode. In other load modes it's cleared by disabling the | |
261 | * controller. | |
262 | */ | |
263 | status &= ~(OMAP_LCDC_STAT_VSYNC | | |
264 | OMAP_LCDC_STAT_LOADED_PALETTE | | |
265 | OMAP_LCDC_STAT_ABC | | |
266 | OMAP_LCDC_STAT_LINE_INT); | |
267 | omap_writel(status, OMAP_LCDC_STATUS); | |
268 | return IRQ_HANDLED; | |
269 | } | |
270 | ||
271 | /* | |
272 | * Change to a new video mode. We defer this to a later time to avoid any | |
273 | * flicker and not to mess up the current LCD DMA context. For this we disable | |
44363f14 | 274 | * the LCD controller, which will generate a DONE irq after the last frame has |
569755c7 ID |
275 | * been transferred. Then it'll be safe to reconfigure both the LCD controller |
276 | * as well as the LCD DMA. | |
277 | */ | |
278 | static int omap_lcdc_setup_plane(int plane, int channel_out, | |
279 | unsigned long offset, int screen_width, | |
280 | int pos_x, int pos_y, int width, int height, | |
281 | int color_mode) | |
282 | { | |
283 | struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var; | |
284 | struct lcd_panel *panel = lcdc.fbdev->panel; | |
285 | int rot_x, rot_y; | |
286 | ||
287 | if (var->rotate == 0) { | |
288 | rot_x = panel->x_res; | |
289 | rot_y = panel->y_res; | |
290 | } else { | |
291 | rot_x = panel->y_res; | |
292 | rot_y = panel->x_res; | |
293 | } | |
294 | if (plane != 0 || channel_out != 0 || pos_x != 0 || pos_y != 0 || | |
295 | width > rot_x || height > rot_y) { | |
296 | #ifdef VERBOSE | |
297 | dev_dbg(lcdc.fbdev->dev, | |
298 | "invalid plane params plane %d pos_x %d pos_y %d " | |
299 | "w %d h %d\n", plane, pos_x, pos_y, width, height); | |
300 | #endif | |
301 | return -EINVAL; | |
302 | } | |
303 | ||
304 | lcdc.frame_offset = offset; | |
305 | lcdc.xres = width; | |
306 | lcdc.yres = height; | |
307 | lcdc.screen_width = screen_width; | |
308 | lcdc.color_mode = color_mode; | |
309 | ||
310 | switch (color_mode) { | |
311 | case OMAPFB_COLOR_CLUT_8BPP: | |
312 | lcdc.bpp = 8; | |
313 | lcdc.palette_code = 0x3000; | |
314 | lcdc.palette_size = 512; | |
315 | break; | |
316 | case OMAPFB_COLOR_RGB565: | |
317 | lcdc.bpp = 16; | |
318 | lcdc.palette_code = 0x4000; | |
319 | lcdc.palette_size = 32; | |
320 | break; | |
321 | case OMAPFB_COLOR_RGB444: | |
322 | lcdc.bpp = 16; | |
323 | lcdc.palette_code = 0x4000; | |
324 | lcdc.palette_size = 32; | |
325 | break; | |
326 | case OMAPFB_COLOR_YUV420: | |
327 | if (lcdc.ext_mode) { | |
328 | lcdc.bpp = 12; | |
329 | break; | |
330 | } | |
331 | /* fallthrough */ | |
332 | case OMAPFB_COLOR_YUV422: | |
333 | if (lcdc.ext_mode) { | |
334 | lcdc.bpp = 16; | |
335 | break; | |
336 | } | |
337 | /* fallthrough */ | |
338 | default: | |
339 | /* FIXME: other BPPs. | |
340 | * bpp1: code 0, size 256 | |
341 | * bpp2: code 0x1000 size 256 | |
342 | * bpp4: code 0x2000 size 256 | |
343 | * bpp12: code 0x4000 size 32 | |
344 | */ | |
345 | dev_dbg(lcdc.fbdev->dev, "invalid color mode %d\n", color_mode); | |
346 | BUG(); | |
347 | return -1; | |
348 | } | |
349 | ||
350 | if (lcdc.ext_mode) { | |
351 | setup_lcd_dma(); | |
352 | return 0; | |
353 | } | |
354 | ||
355 | if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { | |
356 | disable_controller(); | |
357 | omap_stop_lcd_dma(); | |
358 | setup_lcd_dma(); | |
359 | enable_controller(); | |
360 | } | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | static int omap_lcdc_enable_plane(int plane, int enable) | |
366 | { | |
367 | dev_dbg(lcdc.fbdev->dev, | |
368 | "plane %d enable %d update_mode %d ext_mode %d\n", | |
369 | plane, enable, lcdc.update_mode, lcdc.ext_mode); | |
370 | if (plane != OMAPFB_PLANE_GFX) | |
371 | return -EINVAL; | |
372 | ||
373 | return 0; | |
374 | } | |
375 | ||
376 | /* | |
377 | * Configure the LCD DMA for a palette load operation and do the palette | |
378 | * downloading synchronously. We don't use the frame+palette load mode of | |
3ad2f3fb | 379 | * the controller, since the palette can always be downloaded separately. |
569755c7 ID |
380 | */ |
381 | static void load_palette(void) | |
382 | { | |
383 | u16 *palette; | |
384 | ||
385 | palette = (u16 *)lcdc.palette_virt; | |
386 | ||
387 | *(u16 *)palette &= 0x0fff; | |
388 | *(u16 *)palette |= lcdc.palette_code; | |
389 | ||
390 | omap_set_lcd_dma_b1(lcdc.palette_phys, | |
391 | lcdc.palette_size / 4 + 1, 1, OMAP_DMA_DATA_TYPE_S32); | |
392 | ||
393 | omap_set_lcd_dma_single_transfer(1); | |
394 | omap_setup_lcd_dma(); | |
395 | ||
396 | init_completion(&lcdc.palette_load_complete); | |
397 | enable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE); | |
398 | set_load_mode(OMAP_LCDC_LOAD_PALETTE); | |
399 | enable_controller(); | |
400 | if (!wait_for_completion_timeout(&lcdc.palette_load_complete, | |
401 | msecs_to_jiffies(500))) | |
402 | dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n"); | |
403 | /* The controller gets disabled in the irq handler */ | |
404 | disable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE); | |
405 | omap_stop_lcd_dma(); | |
406 | ||
407 | omap_set_lcd_dma_single_transfer(lcdc.ext_mode); | |
408 | } | |
409 | ||
410 | /* Used only in internal controller mode */ | |
411 | static int omap_lcdc_setcolreg(u_int regno, u16 red, u16 green, u16 blue, | |
412 | u16 transp, int update_hw_pal) | |
413 | { | |
414 | u16 *palette; | |
415 | ||
416 | if (lcdc.color_mode != OMAPFB_COLOR_CLUT_8BPP || regno > 255) | |
417 | return -EINVAL; | |
418 | ||
419 | palette = (u16 *)lcdc.palette_virt; | |
420 | ||
421 | palette[regno] &= ~0x0fff; | |
422 | palette[regno] |= ((red >> 12) << 8) | ((green >> 12) << 4 ) | | |
423 | (blue >> 12); | |
424 | ||
425 | if (update_hw_pal) { | |
426 | disable_controller(); | |
427 | omap_stop_lcd_dma(); | |
428 | load_palette(); | |
429 | setup_lcd_dma(); | |
430 | set_load_mode(OMAP_LCDC_LOAD_FRAME); | |
431 | enable_controller(); | |
432 | } | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
437 | static void calc_ck_div(int is_tft, int pck, int *pck_div) | |
438 | { | |
439 | unsigned long lck; | |
440 | ||
441 | pck = max(1, pck); | |
442 | lck = clk_get_rate(lcdc.lcd_ck); | |
443 | *pck_div = (lck + pck - 1) / pck; | |
444 | if (is_tft) | |
445 | *pck_div = max(2, *pck_div); | |
446 | else | |
447 | *pck_div = max(3, *pck_div); | |
448 | if (*pck_div > 255) { | |
449 | /* FIXME: try to adjust logic clock divider as well */ | |
450 | *pck_div = 255; | |
451 | dev_warn(lcdc.fbdev->dev, "pixclock %d kHz too low.\n", | |
452 | pck / 1000); | |
453 | } | |
454 | } | |
455 | ||
ba168a46 | 456 | static inline void setup_regs(void) |
569755c7 ID |
457 | { |
458 | u32 l; | |
459 | struct lcd_panel *panel = lcdc.fbdev->panel; | |
460 | int is_tft = panel->config & OMAP_LCDC_PANEL_TFT; | |
461 | unsigned long lck; | |
462 | int pcd; | |
463 | ||
464 | l = omap_readl(OMAP_LCDC_CONTROL); | |
465 | l &= ~OMAP_LCDC_CTRL_LCD_TFT; | |
466 | l |= is_tft ? OMAP_LCDC_CTRL_LCD_TFT : 0; | |
467 | #ifdef CONFIG_MACH_OMAP_PALMTE | |
468 | /* FIXME:if (machine_is_omap_palmte()) { */ | |
469 | /* PalmTE uses alternate TFT setting in 8BPP mode */ | |
470 | l |= (is_tft && panel->bpp == 8) ? 0x810000 : 0; | |
471 | /* } */ | |
472 | #endif | |
473 | omap_writel(l, OMAP_LCDC_CONTROL); | |
474 | ||
475 | l = omap_readl(OMAP_LCDC_TIMING2); | |
476 | l &= ~(((1 << 6) - 1) << 20); | |
477 | l |= (panel->config & OMAP_LCDC_SIGNAL_MASK) << 20; | |
478 | omap_writel(l, OMAP_LCDC_TIMING2); | |
479 | ||
480 | l = panel->x_res - 1; | |
481 | l |= (panel->hsw - 1) << 10; | |
482 | l |= (panel->hfp - 1) << 16; | |
483 | l |= (panel->hbp - 1) << 24; | |
484 | omap_writel(l, OMAP_LCDC_TIMING0); | |
485 | ||
486 | l = panel->y_res - 1; | |
487 | l |= (panel->vsw - 1) << 10; | |
488 | l |= panel->vfp << 16; | |
489 | l |= panel->vbp << 24; | |
490 | omap_writel(l, OMAP_LCDC_TIMING1); | |
491 | ||
492 | l = omap_readl(OMAP_LCDC_TIMING2); | |
493 | l &= ~0xff; | |
494 | ||
495 | lck = clk_get_rate(lcdc.lcd_ck); | |
496 | ||
497 | if (!panel->pcd) | |
498 | calc_ck_div(is_tft, panel->pixel_clock * 1000, &pcd); | |
499 | else { | |
500 | dev_warn(lcdc.fbdev->dev, | |
501 | "Pixel clock divider value is obsolete.\n" | |
502 | "Try to set pixel_clock to %lu and pcd to 0 " | |
503 | "in drivers/video/omap/lcd_%s.c and submit a patch.\n", | |
504 | lck / panel->pcd / 1000, panel->name); | |
505 | ||
506 | pcd = panel->pcd; | |
507 | } | |
508 | l |= pcd & 0xff; | |
509 | l |= panel->acb << 8; | |
510 | omap_writel(l, OMAP_LCDC_TIMING2); | |
511 | ||
512 | /* update panel info with the exact clock */ | |
513 | panel->pixel_clock = lck / pcd / 1000; | |
514 | } | |
515 | ||
516 | /* | |
517 | * Configure the LCD controller, download the color palette and start a looped | |
518 | * DMA transfer of the frame image data. Called only in internal | |
519 | * controller mode. | |
520 | */ | |
521 | static int omap_lcdc_set_update_mode(enum omapfb_update_mode mode) | |
522 | { | |
523 | int r = 0; | |
524 | ||
525 | if (mode != lcdc.update_mode) { | |
526 | switch (mode) { | |
527 | case OMAPFB_AUTO_UPDATE: | |
528 | setup_regs(); | |
529 | load_palette(); | |
530 | ||
531 | /* Setup and start LCD DMA */ | |
532 | setup_lcd_dma(); | |
533 | ||
534 | set_load_mode(OMAP_LCDC_LOAD_FRAME); | |
535 | enable_irqs(OMAP_LCDC_IRQ_DONE); | |
536 | /* This will start the actual DMA transfer */ | |
537 | enable_controller(); | |
538 | lcdc.update_mode = mode; | |
539 | break; | |
540 | case OMAPFB_UPDATE_DISABLED: | |
541 | disable_controller(); | |
542 | omap_stop_lcd_dma(); | |
543 | lcdc.update_mode = mode; | |
544 | break; | |
545 | default: | |
546 | r = -EINVAL; | |
547 | } | |
548 | } | |
549 | ||
550 | return r; | |
551 | } | |
552 | ||
553 | static enum omapfb_update_mode omap_lcdc_get_update_mode(void) | |
554 | { | |
555 | return lcdc.update_mode; | |
556 | } | |
557 | ||
558 | /* PM code called only in internal controller mode */ | |
559 | static void omap_lcdc_suspend(void) | |
560 | { | |
256a8042 | 561 | omap_lcdc_set_update_mode(OMAPFB_UPDATE_DISABLED); |
569755c7 ID |
562 | } |
563 | ||
564 | static void omap_lcdc_resume(void) | |
565 | { | |
256a8042 | 566 | omap_lcdc_set_update_mode(OMAPFB_AUTO_UPDATE); |
569755c7 ID |
567 | } |
568 | ||
569 | static void omap_lcdc_get_caps(int plane, struct omapfb_caps *caps) | |
570 | { | |
571 | return; | |
572 | } | |
573 | ||
574 | int omap_lcdc_set_dma_callback(void (*callback)(void *data), void *data) | |
575 | { | |
576 | BUG_ON(callback == NULL); | |
577 | ||
578 | if (lcdc.dma_callback) | |
579 | return -EBUSY; | |
580 | else { | |
581 | lcdc.dma_callback = callback; | |
582 | lcdc.dma_callback_data = data; | |
583 | } | |
584 | return 0; | |
585 | } | |
586 | EXPORT_SYMBOL(omap_lcdc_set_dma_callback); | |
587 | ||
588 | void omap_lcdc_free_dma_callback(void) | |
589 | { | |
590 | lcdc.dma_callback = NULL; | |
591 | } | |
592 | EXPORT_SYMBOL(omap_lcdc_free_dma_callback); | |
593 | ||
594 | static void lcdc_dma_handler(u16 status, void *data) | |
595 | { | |
596 | if (lcdc.dma_callback) | |
597 | lcdc.dma_callback(lcdc.dma_callback_data); | |
598 | } | |
599 | ||
569755c7 ID |
600 | static int alloc_palette_ram(void) |
601 | { | |
f6e45661 LR |
602 | lcdc.palette_virt = dma_alloc_wc(lcdc.fbdev->dev, MAX_PALETTE_SIZE, |
603 | &lcdc.palette_phys, GFP_KERNEL); | |
569755c7 ID |
604 | if (lcdc.palette_virt == NULL) { |
605 | dev_err(lcdc.fbdev->dev, "failed to alloc palette memory\n"); | |
606 | return -ENOMEM; | |
607 | } | |
608 | memset(lcdc.palette_virt, 0, MAX_PALETTE_SIZE); | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
613 | static void free_palette_ram(void) | |
614 | { | |
f6e45661 LR |
615 | dma_free_wc(lcdc.fbdev->dev, MAX_PALETTE_SIZE, lcdc.palette_virt, |
616 | lcdc.palette_phys); | |
569755c7 ID |
617 | } |
618 | ||
619 | static int alloc_fbmem(struct omapfb_mem_region *region) | |
620 | { | |
621 | int bpp; | |
622 | int frame_size; | |
623 | struct lcd_panel *panel = lcdc.fbdev->panel; | |
624 | ||
625 | bpp = panel->bpp; | |
626 | if (bpp == 12) | |
627 | bpp = 16; | |
628 | frame_size = PAGE_ALIGN(panel->x_res * bpp / 8 * panel->y_res); | |
629 | if (region->size > frame_size) | |
630 | frame_size = region->size; | |
631 | lcdc.vram_size = frame_size; | |
f6e45661 LR |
632 | lcdc.vram_virt = dma_alloc_wc(lcdc.fbdev->dev, lcdc.vram_size, |
633 | &lcdc.vram_phys, GFP_KERNEL); | |
569755c7 ID |
634 | if (lcdc.vram_virt == NULL) { |
635 | dev_err(lcdc.fbdev->dev, "unable to allocate FB DMA memory\n"); | |
636 | return -ENOMEM; | |
637 | } | |
638 | region->size = frame_size; | |
639 | region->paddr = lcdc.vram_phys; | |
640 | region->vaddr = lcdc.vram_virt; | |
641 | region->alloc = 1; | |
642 | ||
643 | memset(lcdc.vram_virt, 0, lcdc.vram_size); | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
648 | static void free_fbmem(void) | |
649 | { | |
f6e45661 LR |
650 | dma_free_wc(lcdc.fbdev->dev, lcdc.vram_size, lcdc.vram_virt, |
651 | lcdc.vram_phys); | |
569755c7 ID |
652 | } |
653 | ||
654 | static int setup_fbmem(struct omapfb_mem_desc *req_md) | |
655 | { | |
569755c7 ID |
656 | if (!req_md->region_cnt) { |
657 | dev_err(lcdc.fbdev->dev, "no memory regions defined\n"); | |
658 | return -EINVAL; | |
659 | } | |
660 | ||
661 | if (req_md->region_cnt > 1) { | |
662 | dev_err(lcdc.fbdev->dev, "only one plane is supported\n"); | |
663 | req_md->region_cnt = 1; | |
664 | } | |
665 | ||
7ceb1892 | 666 | return alloc_fbmem(&req_md->region[0]); |
569755c7 ID |
667 | } |
668 | ||
669 | static int omap_lcdc_init(struct omapfb_device *fbdev, int ext_mode, | |
670 | struct omapfb_mem_desc *req_vram) | |
671 | { | |
672 | int r; | |
673 | u32 l; | |
674 | int rate; | |
675 | struct clk *tc_ck; | |
676 | ||
677 | lcdc.irq_mask = 0; | |
678 | ||
679 | lcdc.fbdev = fbdev; | |
680 | lcdc.ext_mode = ext_mode; | |
681 | ||
682 | l = 0; | |
683 | omap_writel(l, OMAP_LCDC_CONTROL); | |
684 | ||
685 | /* FIXME: | |
686 | * According to errata some platforms have a clock rate limitiation | |
687 | */ | |
953a7e84 | 688 | lcdc.lcd_ck = clk_get(fbdev->dev, "lcd_ck"); |
569755c7 ID |
689 | if (IS_ERR(lcdc.lcd_ck)) { |
690 | dev_err(fbdev->dev, "unable to access LCD clock\n"); | |
691 | r = PTR_ERR(lcdc.lcd_ck); | |
692 | goto fail0; | |
693 | } | |
694 | ||
953a7e84 | 695 | tc_ck = clk_get(fbdev->dev, "tc_ck"); |
569755c7 ID |
696 | if (IS_ERR(tc_ck)) { |
697 | dev_err(fbdev->dev, "unable to access TC clock\n"); | |
698 | r = PTR_ERR(tc_ck); | |
699 | goto fail1; | |
700 | } | |
701 | ||
702 | rate = clk_get_rate(tc_ck); | |
703 | clk_put(tc_ck); | |
704 | ||
705 | if (machine_is_ams_delta()) | |
706 | rate /= 4; | |
707 | if (machine_is_omap_h3()) | |
708 | rate /= 3; | |
709 | r = clk_set_rate(lcdc.lcd_ck, rate); | |
710 | if (r) { | |
711 | dev_err(fbdev->dev, "failed to adjust LCD rate\n"); | |
712 | goto fail1; | |
713 | } | |
714 | clk_enable(lcdc.lcd_ck); | |
715 | ||
716 | r = request_irq(OMAP_LCDC_IRQ, lcdc_irq_handler, 0, MODULE_NAME, fbdev); | |
717 | if (r) { | |
718 | dev_err(fbdev->dev, "unable to get IRQ\n"); | |
719 | goto fail2; | |
720 | } | |
721 | ||
722 | r = omap_request_lcd_dma(lcdc_dma_handler, NULL); | |
723 | if (r) { | |
724 | dev_err(fbdev->dev, "unable to get LCD DMA\n"); | |
725 | goto fail3; | |
726 | } | |
727 | ||
728 | omap_set_lcd_dma_single_transfer(ext_mode); | |
729 | omap_set_lcd_dma_ext_controller(ext_mode); | |
730 | ||
731 | if (!ext_mode) | |
732 | if ((r = alloc_palette_ram()) < 0) | |
733 | goto fail4; | |
734 | ||
735 | if ((r = setup_fbmem(req_vram)) < 0) | |
736 | goto fail5; | |
737 | ||
738 | pr_info("omapfb: LCDC initialized\n"); | |
739 | ||
740 | return 0; | |
741 | fail5: | |
742 | if (!ext_mode) | |
743 | free_palette_ram(); | |
744 | fail4: | |
745 | omap_free_lcd_dma(); | |
746 | fail3: | |
747 | free_irq(OMAP_LCDC_IRQ, lcdc.fbdev); | |
748 | fail2: | |
749 | clk_disable(lcdc.lcd_ck); | |
750 | fail1: | |
751 | clk_put(lcdc.lcd_ck); | |
752 | fail0: | |
753 | return r; | |
754 | } | |
755 | ||
756 | static void omap_lcdc_cleanup(void) | |
757 | { | |
758 | if (!lcdc.ext_mode) | |
759 | free_palette_ram(); | |
7ceb1892 | 760 | free_fbmem(); |
569755c7 ID |
761 | omap_free_lcd_dma(); |
762 | free_irq(OMAP_LCDC_IRQ, lcdc.fbdev); | |
763 | clk_disable(lcdc.lcd_ck); | |
764 | clk_put(lcdc.lcd_ck); | |
765 | } | |
766 | ||
767 | const struct lcd_ctrl omap1_int_ctrl = { | |
768 | .name = "internal", | |
769 | .init = omap_lcdc_init, | |
770 | .cleanup = omap_lcdc_cleanup, | |
771 | .get_caps = omap_lcdc_get_caps, | |
772 | .set_update_mode = omap_lcdc_set_update_mode, | |
773 | .get_update_mode = omap_lcdc_get_update_mode, | |
774 | .update_window = NULL, | |
775 | .suspend = omap_lcdc_suspend, | |
776 | .resume = omap_lcdc_resume, | |
777 | .setup_plane = omap_lcdc_setup_plane, | |
778 | .enable_plane = omap_lcdc_enable_plane, | |
779 | .setcolreg = omap_lcdc_setcolreg, | |
780 | }; |