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Merge git://git.denx.de/u-boot-fdt
[J-u-boot.git] / drivers / video / da8xx-fb.c
CommitLineData
13402868
SB		 1/*
2 * Porting to u-boot:
3 *
4 * (C) Copyright 2011
5 * Stefano Babic, DENX Software Engineering, [email protected].
6 *
7 * Copyright (C) 2008-2009 MontaVista Software Inc.
8 * Copyright (C) 2008-2009 Texas Instruments Inc
9 *
10 * Based on the LCD driver for TI Avalanche processors written by
11 * Ajay Singh and Shalom Hai.
12 *
1a459660 13 * SPDX-License-Identifier: GPL-2.0+
13402868
SB		 14 */
15
16#include <common.h>
17#include <malloc.h>
18#include <video_fb.h>
19#include <linux/list.h>
20#include <linux/fb.h>
21
22#include <asm/errno.h>
23#include <asm/io.h>
24#include <asm/arch/hardware.h>
25
26#include "videomodes.h"
0017f9ee 27#include "da8xx-fb.h"
13402868 28
765f2f08
HS		 29#if !defined(DA8XX_LCD_CNTL_BASE)
30#define DA8XX_LCD_CNTL_BASE DAVINCI_LCD_CNTL_BASE
31#endif
32
13402868
SB		 33#define DRIVER_NAME "da8xx_lcdc"
34
765f2f08
HS		 35#define LCD_VERSION_1 1
36#define LCD_VERSION_2 2
37
13402868
SB		 38/* LCD Status Register */
39#define LCD_END_OF_FRAME1 (1 << 9)
40#define LCD_END_OF_FRAME0 (1 << 8)
41#define LCD_PL_LOAD_DONE (1 << 6)
42#define LCD_FIFO_UNDERFLOW (1 << 5)
43#define LCD_SYNC_LOST (1 << 2)
44
45/* LCD DMA Control Register */
46#define LCD_DMA_BURST_SIZE(x) ((x) << 4)
47#define LCD_DMA_BURST_1 0x0
48#define LCD_DMA_BURST_2 0x1
49#define LCD_DMA_BURST_4 0x2
50#define LCD_DMA_BURST_8 0x3
51#define LCD_DMA_BURST_16 0x4
765f2f08
HS		 52#define LCD_V1_END_OF_FRAME_INT_ENA (1 << 2)
53#define LCD_V2_END_OF_FRAME0_INT_ENA (1 << 8)
54#define LCD_V2_END_OF_FRAME1_INT_ENA (1 << 9)
13402868
SB		 55#define LCD_DUAL_FRAME_BUFFER_ENABLE (1 << 0)
56
765f2f08
HS		 57#define LCD_V2_TFT_24BPP_MODE (1 << 25)
58#define LCD_V2_TFT_24BPP_UNPACK (1 << 26)
59
13402868
SB		 60/* LCD Control Register */
61#define LCD_CLK_DIVISOR(x) ((x) << 8)
62#define LCD_RASTER_MODE 0x01
63
64/* LCD Raster Control Register */
65#define LCD_PALETTE_LOAD_MODE(x) ((x) << 20)
66#define PALETTE_AND_DATA 0x00
67#define PALETTE_ONLY 0x01
68#define DATA_ONLY 0x02
69
70#define LCD_MONO_8BIT_MODE (1 << 9)
71#define LCD_RASTER_ORDER (1 << 8)
72#define LCD_TFT_MODE (1 << 7)
765f2f08
HS		 73#define LCD_V1_UNDERFLOW_INT_ENA (1 << 6)
74#define LCD_V2_UNDERFLOW_INT_ENA (1 << 5)
75#define LCD_V1_PL_INT_ENA (1 << 4)
76#define LCD_V2_PL_INT_ENA (1 << 6)
13402868
SB		 77#define LCD_MONOCHROME_MODE (1 << 1)
78#define LCD_RASTER_ENABLE (1 << 0)
79#define LCD_TFT_ALT_ENABLE (1 << 23)
80#define LCD_STN_565_ENABLE (1 << 24)
765f2f08
HS		 81#define LCD_V2_DMA_CLK_EN (1 << 2)
82#define LCD_V2_LIDD_CLK_EN (1 << 1)
83#define LCD_V2_CORE_CLK_EN (1 << 0)
84#define LCD_V2_LPP_B10 26
85#define LCD_V2_TFT_24BPP_MODE (1 << 25)
86#define LCD_V2_TFT_24BPP_UNPACK (1 << 26)
13402868
SB		 87
88/* LCD Raster Timing 2 Register */
89#define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
90#define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8)
91#define LCD_SYNC_CTRL (1 << 25)
92#define LCD_SYNC_EDGE (1 << 24)
93#define LCD_INVERT_PIXEL_CLOCK (1 << 22)
94#define LCD_INVERT_LINE_CLOCK (1 << 21)
95#define LCD_INVERT_FRAME_CLOCK (1 << 20)
96
765f2f08
HS		 97/* Clock registers available only on Version 2 */
98#define LCD_CLK_MAIN_RESET (1 << 3)
13402868
SB		 99/* LCD Block */
100struct da8xx_lcd_regs {
101 u32 revid;
102 u32 ctrl;
103 u32 stat;
104 u32 lidd_ctrl;
105 u32 lidd_cs0_conf;
106 u32 lidd_cs0_addr;
107 u32 lidd_cs0_data;
108 u32 lidd_cs1_conf;
109 u32 lidd_cs1_addr;
110 u32 lidd_cs1_data;
111 u32 raster_ctrl;
112 u32 raster_timing_0;
113 u32 raster_timing_1;
114 u32 raster_timing_2;
115 u32 raster_subpanel;
116 u32 reserved;
117 u32 dma_ctrl;
118 u32 dma_frm_buf_base_addr_0;
119 u32 dma_frm_buf_ceiling_addr_0;
120 u32 dma_frm_buf_base_addr_1;
121 u32 dma_frm_buf_ceiling_addr_1;
765f2f08
HS		 122 u32 resv1;
123 u32 raw_stat;
124 u32 masked_stat;
125 u32 int_ena_set;
126 u32 int_ena_clr;
127 u32 end_of_int_ind;
128 /* Clock registers available only on Version 2 */
129 u32 clk_ena;
130 u32 clk_reset;
13402868
SB		 131};
132
133#define LCD_NUM_BUFFERS 1
134
135#define WSI_TIMEOUT 50
136#define PALETTE_SIZE 256
137#define LEFT_MARGIN 64
138#define RIGHT_MARGIN 64
139#define UPPER_MARGIN 32
140#define LOWER_MARGIN 32
765f2f08
HS		 141#define WAIT_FOR_FRAME_DONE true
142#define NO_WAIT_FOR_FRAME_DONE false
13402868
SB		 143
144#define calc_fbsize() (panel.plnSizeX * panel.plnSizeY * panel.gdfBytesPP)
13402868
SB		 145
146static struct da8xx_lcd_regs *da8xx_fb_reg_base;
147
148DECLARE_GLOBAL_DATA_PTR;
149
150/* graphics setup */
151static GraphicDevice gpanel;
152static const struct da8xx_panel *lcd_panel;
153static struct fb_info *da8xx_fb_info;
154static int bits_x_pixel;
765f2f08
HS		 155static unsigned int lcd_revision;
156const struct lcd_ctrl_config *da8xx_lcd_cfg;
13402868
SB		 157
158static inline unsigned int lcdc_read(u32 *addr)
159{
160 return (unsigned int)readl(addr);
161}
162
163static inline void lcdc_write(unsigned int val, u32 *addr)
164{
165 writel(val, addr);
166}
167
168struct da8xx_fb_par {
169 u32 p_palette_base;
170 unsigned char *v_palette_base;
171 dma_addr_t vram_phys;
172 unsigned long vram_size;
173 void *vram_virt;
174 unsigned int dma_start;
175 unsigned int dma_end;
176 struct clk *lcdc_clk;
177 int irq;
178 unsigned short pseudo_palette[16];
179 unsigned int palette_sz;
180 unsigned int pxl_clk;
181 int blank;
182 int vsync_flag;
183 int vsync_timeout;
184};
185
186
187/* Variable Screen Information */
188static struct fb_var_screeninfo da8xx_fb_var = {
189 .xoffset = 0,
190 .yoffset = 0,
191 .transp = {0, 0, 0},
192 .nonstd = 0,
193 .activate = 0,
194 .height = -1,
195 .width = -1,
196 .pixclock = 46666, /* 46us - AUO display */
197 .accel_flags = 0,
198 .left_margin = LEFT_MARGIN,
199 .right_margin = RIGHT_MARGIN,
200 .upper_margin = UPPER_MARGIN,
201 .lower_margin = LOWER_MARGIN,
202 .sync = 0,
203 .vmode = FB_VMODE_NONINTERLACED
204};
205
206static struct fb_fix_screeninfo da8xx_fb_fix = {
207 .id = "DA8xx FB Drv",
208 .type = FB_TYPE_PACKED_PIXELS,
209 .type_aux = 0,
210 .visual = FB_VISUAL_PSEUDOCOLOR,
211 .xpanstep = 0,
212 .ypanstep = 1,
213 .ywrapstep = 0,
214 .accel = FB_ACCEL_NONE
215};
216
13402868
SB		 217/* Enable the Raster Engine of the LCD Controller */
218static inline void lcd_enable_raster(void)
219{
220 u32 reg;
221
765f2f08
HS		 222 /* Put LCDC in reset for several cycles */
223 if (lcd_revision == LCD_VERSION_2)
224 lcdc_write(LCD_CLK_MAIN_RESET,
225 &da8xx_fb_reg_base->clk_reset);
226
227 udelay(1000);
228 /* Bring LCDC out of reset */
229 if (lcd_revision == LCD_VERSION_2)
230 lcdc_write(0,
231 &da8xx_fb_reg_base->clk_reset);
232
233 udelay(1000);
234
13402868
SB		 235 reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
236 if (!(reg & LCD_RASTER_ENABLE))
237 lcdc_write(reg | LCD_RASTER_ENABLE,
238 &da8xx_fb_reg_base->raster_ctrl);
239}
240
241/* Disable the Raster Engine of the LCD Controller */
765f2f08 242static inline void lcd_disable_raster(bool wait_for_frame_done)
13402868
SB		 243{
244 u32 reg;
765f2f08
HS		 245 u32 loop_cnt = 0;
246 u32 stat;
247 u32 i = 0;
248
249 if (wait_for_frame_done)
250 loop_cnt = 5000;
13402868
SB		 251
252 reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
253 if (reg & LCD_RASTER_ENABLE)
254 lcdc_write(reg & ~LCD_RASTER_ENABLE,
255 &da8xx_fb_reg_base->raster_ctrl);
765f2f08
HS		 256
257 /* Wait for the current frame to complete */
258 do {
259 if (lcd_revision == LCD_VERSION_1)
260 stat = lcdc_read(&da8xx_fb_reg_base->stat);
261 else
262 stat = lcdc_read(&da8xx_fb_reg_base->raw_stat);
263
264 mdelay(1);
265 } while (!(stat & 0x01) && (i++ < loop_cnt));
266
267 if (lcd_revision == LCD_VERSION_1)
268 lcdc_write(stat, &da8xx_fb_reg_base->stat);
269 else
270 lcdc_write(stat, &da8xx_fb_reg_base->raw_stat);
271
272 if ((loop_cnt != 0) && (i >= loop_cnt)) {
273 printf("LCD Controller timed out\n");
274 return;
275 }
13402868
SB		 276}
277
278static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
279{
280 u32 start;
281 u32 end;
282 u32 reg_ras;
283 u32 reg_dma;
765f2f08 284 u32 reg_int;
13402868
SB		 285
286 /* init reg to clear PLM (loading mode) fields */
287 reg_ras = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
288 reg_ras &= ~(3 << 20);
289
290 reg_dma = lcdc_read(&da8xx_fb_reg_base->dma_ctrl);
291
292 if (load_mode == LOAD_DATA) {
293 start = par->dma_start;
294 end = par->dma_end;
295
296 reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY);
765f2f08
HS		 297 if (lcd_revision == LCD_VERSION_1) {
298 reg_dma |= LCD_V1_END_OF_FRAME_INT_ENA;
299 } else {
300 reg_int = lcdc_read(&da8xx_fb_reg_base->int_ena_set) |
301 LCD_V2_END_OF_FRAME0_INT_ENA |
302 LCD_V2_END_OF_FRAME1_INT_ENA |
303 LCD_V2_UNDERFLOW_INT_ENA | LCD_SYNC_LOST;
304 lcdc_write(reg_int, &da8xx_fb_reg_base->int_ena_set);
305 }
13402868
SB		 306
307#if (LCD_NUM_BUFFERS == 2)
308 reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
309 lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
310 lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
311 lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_1);
312 lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_1);
313#else
314 reg_dma &= ~LCD_DUAL_FRAME_BUFFER_ENABLE;
315 lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
316 lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
317 lcdc_write(0, &da8xx_fb_reg_base->dma_frm_buf_base_addr_1);
318 lcdc_write(0, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_1);
319#endif
320
321 } else if (load_mode == LOAD_PALETTE) {
322 start = par->p_palette_base;
323 end = start + par->palette_sz - 1;
324
325 reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
765f2f08
HS		 326 if (lcd_revision == LCD_VERSION_1) {
327 reg_ras |= LCD_V1_PL_INT_ENA;
328 } else {
329 reg_int = lcdc_read(&da8xx_fb_reg_base->int_ena_set) |
330 LCD_V2_PL_INT_ENA;
331 lcdc_write(reg_int, &da8xx_fb_reg_base->int_ena_set);
332 }
13402868
SB		 333
334 lcdc_write(start, &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
335 lcdc_write(end, &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
336 }
337
338 lcdc_write(reg_dma, &da8xx_fb_reg_base->dma_ctrl);
339 lcdc_write(reg_ras, &da8xx_fb_reg_base->raster_ctrl);
340
341 /*
342 * The Raster enable bit must be set after all other control fields are
343 * set.
344 */
345 lcd_enable_raster();
346}
347
348/* Configure the Burst Size of DMA */
349static int lcd_cfg_dma(int burst_size)
350{
351 u32 reg;
352
353 reg = lcdc_read(&da8xx_fb_reg_base->dma_ctrl) & 0x00000001;
354 switch (burst_size) {
355 case 1:
356 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
357 break;
358 case 2:
359 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
360 break;
361 case 4:
362 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
363 break;
364 case 8:
365 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
366 break;
367 case 16:
368 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
369 break;
370 default:
371 return -EINVAL;
372 }
373 lcdc_write(reg, &da8xx_fb_reg_base->dma_ctrl);
374
375 return 0;
376}
377
378static void lcd_cfg_ac_bias(int period, int transitions_per_int)
379{
380 u32 reg;
381
535cce0f 382 /* Set the AC Bias Period and Number of Transitions per Interrupt */
13402868
SB		 383 reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_2) & 0xFFF00000;
384 reg |= LCD_AC_BIAS_FREQUENCY(period) |
385 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
386 lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_2);
387}
388
389static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
390 int front_porch)
391{
392 u32 reg;
393
394 reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_0) & 0xf;
395 reg |= ((back_porch & 0xff) << 24)
396 | ((front_porch & 0xff) << 16)
397 | ((pulse_width & 0x3f) << 10);
398 lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_0);
399}
400
401static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
402 int front_porch)
403{
404 u32 reg;
405
406 reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_1) & 0x3ff;
407 reg |= ((back_porch & 0xff) << 24)
408 | ((front_porch & 0xff) << 16)
409 | ((pulse_width & 0x3f) << 10);
410 lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_1);
411}
412
413static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
414{
415 u32 reg;
765f2f08 416 u32 reg_int;
13402868
SB		 417
418 reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl) & ~(LCD_TFT_MODE |
419 LCD_MONO_8BIT_MODE |
420 LCD_MONOCHROME_MODE);
421
422 switch (cfg->p_disp_panel->panel_shade) {
423 case MONOCHROME:
424 reg |= LCD_MONOCHROME_MODE;
425 if (cfg->mono_8bit_mode)
426 reg |= LCD_MONO_8BIT_MODE;
427 break;
428 case COLOR_ACTIVE:
429 reg |= LCD_TFT_MODE;
430 if (cfg->tft_alt_mode)
431 reg |= LCD_TFT_ALT_ENABLE;
432 break;
433
434 case COLOR_PASSIVE:
435 if (cfg->stn_565_mode)
436 reg |= LCD_STN_565_ENABLE;
437 break;
438
439 default:
440 return -EINVAL;
441 }
442
443 /* enable additional interrupts here */
765f2f08
HS		 444 if (lcd_revision == LCD_VERSION_1) {
445 reg |= LCD_V1_UNDERFLOW_INT_ENA;
446 } else {
447 reg_int = lcdc_read(&da8xx_fb_reg_base->int_ena_set) |
448 LCD_V2_UNDERFLOW_INT_ENA;
449 lcdc_write(reg_int, &da8xx_fb_reg_base->int_ena_set);
450 }
13402868
SB		 451
452 lcdc_write(reg, &da8xx_fb_reg_base->raster_ctrl);
453
454 reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_2);
455
456 if (cfg->sync_ctrl)
457 reg |= LCD_SYNC_CTRL;
458 else
459 reg &= ~LCD_SYNC_CTRL;
460
461 if (cfg->sync_edge)
462 reg |= LCD_SYNC_EDGE;
463 else
464 reg &= ~LCD_SYNC_EDGE;
465
466 if (cfg->invert_line_clock)
467 reg |= LCD_INVERT_LINE_CLOCK;
468 else
469 reg &= ~LCD_INVERT_LINE_CLOCK;
470
471 if (cfg->invert_frm_clock)
472 reg |= LCD_INVERT_FRAME_CLOCK;
473 else
474 reg &= ~LCD_INVERT_FRAME_CLOCK;
475
476 lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_2);
477
478 return 0;
479}
480
481static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
482 u32 bpp, u32 raster_order)
483{
484 u32 reg;
485
486 /* Set the Panel Width */
487 /* Pixels per line = (PPL + 1)*16 */
765f2f08
HS		 488 if (lcd_revision == LCD_VERSION_1) {
489 /*
535cce0f 490 * 0x3F in bits 4..9 gives max horizontal resolution = 1024
765f2f08
HS		 491 * pixels
492 */
493 width &= 0x3f0;
494 } else {
495 /*
496 * 0x7F in bits 4..10 gives max horizontal resolution = 2048
497 * pixels.
498 */
499 width &= 0x7f0;
500 }
13402868
SB		 501 reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_0);
502 reg &= 0xfffffc00;
765f2f08
HS		 503 if (lcd_revision == LCD_VERSION_1) {
504 reg |= ((width >> 4) - 1) << 4;
505 } else {
506 width = (width >> 4) - 1;
507 reg |= ((width & 0x3f) << 4) | ((width & 0x40) >> 3);
508 }
13402868
SB		 509 lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_0);
510
511 /* Set the Panel Height */
765f2f08 512 /* Set bits 9:0 of Lines Per Pixel */
13402868
SB		 513 reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_1);
514 reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
515 lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_1);
516
765f2f08
HS		 517 /* Set bit 10 of Lines Per Pixel */
518 if (lcd_revision == LCD_VERSION_2) {
519 reg = lcdc_read(&da8xx_fb_reg_base->raster_timing_2);
520 reg |= ((height - 1) & 0x400) << 16;
521 lcdc_write(reg, &da8xx_fb_reg_base->raster_timing_2);
522 }
523
13402868
SB		 524 /* Set the Raster Order of the Frame Buffer */
525 reg = lcdc_read(&da8xx_fb_reg_base->raster_ctrl) & ~(1 << 8);
526 if (raster_order)
527 reg |= LCD_RASTER_ORDER;
765f2f08
HS		 528
529 if (bpp == 24)
530 reg |= (LCD_TFT_MODE | LCD_V2_TFT_24BPP_MODE);
531 else if (bpp == 32)
532 reg |= (LCD_TFT_MODE | LCD_V2_TFT_24BPP_MODE
533 | LCD_V2_TFT_24BPP_UNPACK);
534
13402868
SB		 535 lcdc_write(reg, &da8xx_fb_reg_base->raster_ctrl);
536
537 switch (bpp) {
538 case 1:
539 case 2:
540 case 4:
541 case 16:
765f2f08
HS		 542 case 24:
543 case 32:
13402868
SB		 544 par->palette_sz = 16 * 2;
545 break;
546
547 case 8:
548 par->palette_sz = 256 * 2;
549 break;
550
551 default:
552 return -EINVAL;
553 }
554
555 return 0;
556}
557
558static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
559 unsigned blue, unsigned transp,
560 struct fb_info *info)
561{
562 struct da8xx_fb_par *par = info->par;
563 unsigned short *palette = (unsigned short *) par->v_palette_base;
564 u_short pal;
565 int update_hw = 0;
566
567 if (regno > 255)
568 return 1;
569
570 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
571 return 1;
572
573 if (info->var.bits_per_pixel == 8) {
574 red >>= 4;
575 green >>= 8;
576 blue >>= 12;
577
578 pal = (red & 0x0f00);
579 pal |= (green & 0x00f0);
580 pal |= (blue & 0x000f);
581
582 if (palette[regno] != pal) {
583 update_hw = 1;
584 palette[regno] = pal;
585 }
586 } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
587 red >>= (16 - info->var.red.length);
588 red <<= info->var.red.offset;
589
590 green >>= (16 - info->var.green.length);
591 green <<= info->var.green.offset;
592
593 blue >>= (16 - info->var.blue.length);
594 blue <<= info->var.blue.offset;
595
596 par->pseudo_palette[regno] = red | green | blue;
597
765f2f08
HS		 598 if (palette[0] != 0x4000) {
599 update_hw = 1;
600 palette[0] = 0x4000;
601 }
602 } else if (((info->var.bits_per_pixel == 32) && regno < 32) ||
603 ((info->var.bits_per_pixel == 24) && regno < 24)) {
604 red >>= (24 - info->var.red.length);
605 red <<= info->var.red.offset;
606
607 green >>= (24 - info->var.green.length);
608 green <<= info->var.green.offset;
609
610 blue >>= (24 - info->var.blue.length);
611 blue <<= info->var.blue.offset;
612
613 par->pseudo_palette[regno] = red | green | blue;
614
13402868
SB		 615 if (palette[0] != 0x4000) {
616 update_hw = 1;
617 palette[0] = 0x4000;
618 }
619 }
620
621 /* Update the palette in the h/w as needed. */
622 if (update_hw)
623 lcd_blit(LOAD_PALETTE, par);
624
625 return 0;
626}
627
628static void lcd_reset(struct da8xx_fb_par *par)
629{
630 /* Disable the Raster if previously Enabled */
765f2f08 631 lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
13402868
SB		 632
633 /* DMA has to be disabled */
634 lcdc_write(0, &da8xx_fb_reg_base->dma_ctrl);
635 lcdc_write(0, &da8xx_fb_reg_base->raster_ctrl);
765f2f08
HS		 636
637 if (lcd_revision == LCD_VERSION_2) {
638 lcdc_write(0, &da8xx_fb_reg_base->int_ena_set);
639 /* Write 1 to reset */
640 lcdc_write(LCD_CLK_MAIN_RESET, &da8xx_fb_reg_base->clk_reset);
641 lcdc_write(0, &da8xx_fb_reg_base->clk_reset);
642 }
13402868
SB		 643}
644
645static void lcd_calc_clk_divider(struct da8xx_fb_par *par)
646{
647 unsigned int lcd_clk, div;
648
649 /* Get clock from sysclk2 */
650 lcd_clk = clk_get(2);
651
652 div = lcd_clk / par->pxl_clk;
765f2f08
HS		 653 debug("LCD Clock: %d Divider: %d PixClk: %d\n",
654 lcd_clk, div, par->pxl_clk);
13402868
SB		 655
656 /* Configure the LCD clock divisor. */
657 lcdc_write(LCD_CLK_DIVISOR(div) |
658 (LCD_RASTER_MODE & 0x1), &da8xx_fb_reg_base->ctrl);
765f2f08
HS		 659
660 if (lcd_revision == LCD_VERSION_2)
661 lcdc_write(LCD_V2_DMA_CLK_EN | LCD_V2_LIDD_CLK_EN |
662 LCD_V2_CORE_CLK_EN,
663 &da8xx_fb_reg_base->clk_ena);
13402868
SB		 664}
665
666static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
667 const struct da8xx_panel *panel)
668{
669 u32 bpp;
670 int ret = 0;
671
672 lcd_reset(par);
673
674 /* Calculate the divider */
675 lcd_calc_clk_divider(par);
676
677 if (panel->invert_pxl_clk)
678 lcdc_write((lcdc_read(&da8xx_fb_reg_base->raster_timing_2) |
679 LCD_INVERT_PIXEL_CLOCK),
680 &da8xx_fb_reg_base->raster_timing_2);
681 else
682 lcdc_write((lcdc_read(&da8xx_fb_reg_base->raster_timing_2) &
683 ~LCD_INVERT_PIXEL_CLOCK),
684 &da8xx_fb_reg_base->raster_timing_2);
685
686 /* Configure the DMA burst size. */
687 ret = lcd_cfg_dma(cfg->dma_burst_sz);
688 if (ret < 0)
689 return ret;
690
691 /* Configure the AC bias properties. */
692 lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
693
694 /* Configure the vertical and horizontal sync properties. */
695 lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp);
696 lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp);
697
535cce0f 698 /* Configure for display */
13402868
SB		 699 ret = lcd_cfg_display(cfg);
700 if (ret < 0)
701 return ret;
702
765f2f08
HS		 703 if ((QVGA != cfg->p_disp_panel->panel_type) &&
704 (WVGA != cfg->p_disp_panel->panel_type))
13402868
SB		 705 return -EINVAL;
706
707 if (cfg->bpp <= cfg->p_disp_panel->max_bpp &&
708 cfg->bpp >= cfg->p_disp_panel->min_bpp)
709 bpp = cfg->bpp;
710 else
711 bpp = cfg->p_disp_panel->max_bpp;
712 if (bpp == 12)
713 bpp = 16;
714 ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width,
715 (unsigned int)panel->height, bpp,
716 cfg->raster_order);
717 if (ret < 0)
718 return ret;
719
720 /* Configure FDD */
721 lcdc_write((lcdc_read(&da8xx_fb_reg_base->raster_ctrl) & 0xfff00fff) |
722 (cfg->fdd << 12), &da8xx_fb_reg_base->raster_ctrl);
723
724 return 0;
725}
726
727static void lcdc_dma_start(void)
728{
729 struct da8xx_fb_par *par = da8xx_fb_info->par;
730 lcdc_write(par->dma_start,
731 &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
732 lcdc_write(par->dma_end,
733 &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
734 lcdc_write(0,
735 &da8xx_fb_reg_base->dma_frm_buf_base_addr_1);
736 lcdc_write(0,
737 &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_1);
738}
739
765f2f08 740static u32 lcdc_irq_handler_rev01(void)
13402868
SB		 741{
742 struct da8xx_fb_par *par = da8xx_fb_info->par;
743 u32 stat = lcdc_read(&da8xx_fb_reg_base->stat);
744 u32 reg_ras;
745
746 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
747 debug("LCD_SYNC_LOST\n");
765f2f08 748 lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
13402868
SB		 749 lcdc_write(stat, &da8xx_fb_reg_base->stat);
750 lcd_enable_raster();
751 return LCD_SYNC_LOST;
752 } else if (stat & LCD_PL_LOAD_DONE) {
753 debug("LCD_PL_LOAD_DONE\n");
754 /*
755 * Must disable raster before changing state of any control bit.
756 * And also must be disabled before clearing the PL loading
757 * interrupt via the following write to the status register. If
758 * this is done after then one gets multiple PL done interrupts.
759 */
765f2f08 760 lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
13402868
SB		 761
762 lcdc_write(stat, &da8xx_fb_reg_base->stat);
763
535cce0f 764 /* Disable PL completion interrupt */
13402868 765 reg_ras = lcdc_read(&da8xx_fb_reg_base->raster_ctrl);
765f2f08 766 reg_ras &= ~LCD_V1_PL_INT_ENA;
13402868
SB		 767 lcdc_write(reg_ras, &da8xx_fb_reg_base->raster_ctrl);
768
769 /* Setup and start data loading mode */
770 lcd_blit(LOAD_DATA, par);
771 return LCD_PL_LOAD_DONE;
772 } else {
773 lcdc_write(stat, &da8xx_fb_reg_base->stat);
774
775 if (stat & LCD_END_OF_FRAME0)
776 debug("LCD_END_OF_FRAME0\n");
777
778 lcdc_write(par->dma_start,
779 &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
780 lcdc_write(par->dma_end,
781 &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
782 par->vsync_flag = 1;
783 return LCD_END_OF_FRAME0;
784 }
785 return stat;
786}
787
765f2f08
HS		 788static u32 lcdc_irq_handler_rev02(void)
789{
790 struct da8xx_fb_par *par = da8xx_fb_info->par;
791 u32 stat = lcdc_read(&da8xx_fb_reg_base->masked_stat);
792 u32 reg_int;
793
794 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
795 debug("LCD_SYNC_LOST\n");
796 lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
797 lcdc_write(stat, &da8xx_fb_reg_base->masked_stat);
798 lcd_enable_raster();
799 lcdc_write(0, &da8xx_fb_reg_base->end_of_int_ind);
800 return LCD_SYNC_LOST;
801 } else if (stat & LCD_PL_LOAD_DONE) {
802 debug("LCD_PL_LOAD_DONE\n");
803 /*
804 * Must disable raster before changing state of any control bit.
805 * And also must be disabled before clearing the PL loading
806 * interrupt via the following write to the status register. If
807 * this is done after then one gets multiple PL done interrupts.
808 */
809 lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
810
811 lcdc_write(stat, &da8xx_fb_reg_base->masked_stat);
812
535cce0f 813 /* Disable PL completion interrupt */
765f2f08
HS		 814 reg_int = lcdc_read(&da8xx_fb_reg_base->int_ena_clr) |
815 (LCD_V2_PL_INT_ENA);
816 lcdc_write(reg_int, &da8xx_fb_reg_base->int_ena_clr);
817
818 /* Setup and start data loading mode */
819 lcd_blit(LOAD_DATA, par);
820 lcdc_write(0, &da8xx_fb_reg_base->end_of_int_ind);
821 return LCD_PL_LOAD_DONE;
822 } else {
823 lcdc_write(stat, &da8xx_fb_reg_base->masked_stat);
824
825 if (stat & LCD_END_OF_FRAME0)
826 debug("LCD_END_OF_FRAME0\n");
827
828 lcdc_write(par->dma_start,
829 &da8xx_fb_reg_base->dma_frm_buf_base_addr_0);
830 lcdc_write(par->dma_end,
831 &da8xx_fb_reg_base->dma_frm_buf_ceiling_addr_0);
832 par->vsync_flag = 1;
833 lcdc_write(0, &da8xx_fb_reg_base->end_of_int_ind);
834 return LCD_END_OF_FRAME0;
835 }
836 lcdc_write(0, &da8xx_fb_reg_base->end_of_int_ind);
837 return stat;
838}
839
840static u32 lcdc_irq_handler(void)
841{
842 if (lcd_revision == LCD_VERSION_1)
843 return lcdc_irq_handler_rev01();
844 else
845 return lcdc_irq_handler_rev02();
846}
847
13402868
SB		 848static u32 wait_for_event(u32 event)
849{
850 u32 timeout = 50000;
851 u32 ret;
852
853 do {
854 ret = lcdc_irq_handler();
855 udelay(1000);
856 } while (!(ret & event));
857
858 if (timeout <= 0) {
859 printf("%s: event %d not hit\n", __func__, event);
860 return -1;
861 }
862
863 return 0;
864
865}
866
867void *video_hw_init(void)
868{
869 struct da8xx_fb_par *par;
13402868 870 u32 size;
765f2f08 871 u32 rev;
13402868
SB		 872 char *p;
873
874 if (!lcd_panel) {
875 printf("Display not initialized\n");
876 return NULL;
877 }
878 gpanel.winSizeX = lcd_panel->width;
879 gpanel.winSizeY = lcd_panel->height;
880 gpanel.plnSizeX = lcd_panel->width;
881 gpanel.plnSizeY = lcd_panel->height;
882
883 switch (bits_x_pixel) {
765f2f08
HS		 884 case 32:
885 gpanel.gdfBytesPP = 4;
886 gpanel.gdfIndex = GDF_32BIT_X888RGB;
887 break;
13402868
SB		 888 case 24:
889 gpanel.gdfBytesPP = 4;
890 gpanel.gdfIndex = GDF_32BIT_X888RGB;
891 break;
892 case 16:
893 gpanel.gdfBytesPP = 2;
894 gpanel.gdfIndex = GDF_16BIT_565RGB;
895 break;
896 default:
897 gpanel.gdfBytesPP = 1;
898 gpanel.gdfIndex = GDF__8BIT_INDEX;
899 break;
900 }
901
765f2f08
HS		 902 da8xx_fb_reg_base = (struct da8xx_lcd_regs *)DA8XX_LCD_CNTL_BASE;
903
904 /* Determine LCD IP Version */
905 rev = lcdc_read(&da8xx_fb_reg_base->revid);
906 switch (rev) {
907 case 0x4C100102:
908 lcd_revision = LCD_VERSION_1;
909 break;
910 case 0x4F200800:
911 case 0x4F201000:
912 lcd_revision = LCD_VERSION_2;
913 break;
914 default:
915 printf("Unknown PID Reg value 0x%x, defaulting to LCD revision 1\n",
916 rev);
917 lcd_revision = LCD_VERSION_1;
918 break;
919 }
13402868 920
765f2f08
HS		 921 debug("rev: 0x%x Resolution: %dx%d %d\n", rev,
922 gpanel.winSizeX,
923 gpanel.winSizeY,
924 da8xx_lcd_cfg->bpp);
13402868
SB		 925
926 size = sizeof(struct fb_info) + sizeof(struct da8xx_fb_par);
927 da8xx_fb_info = malloc(size);
928 debug("da8xx_fb_info at %x\n", (unsigned int)da8xx_fb_info);
929
930 if (!da8xx_fb_info) {
931 printf("Memory allocation failed for fb_info\n");
932 return NULL;
933 }
934 memset(da8xx_fb_info, 0, size);
935 p = (char *)da8xx_fb_info;
936 da8xx_fb_info->par = p + sizeof(struct fb_info);
937 debug("da8xx_par at %x\n", (unsigned int)da8xx_fb_info->par);
938
939 par = da8xx_fb_info->par;
940 par->pxl_clk = lcd_panel->pxl_clk;
941
765f2f08 942 if (lcd_init(par, da8xx_lcd_cfg, lcd_panel) < 0) {
13402868 943 printf("lcd_init failed\n");
13402868
SB		 944 goto err_release_fb;
945 }
946
947 /* allocate frame buffer */
765f2f08
HS		 948 par->vram_size = lcd_panel->width * lcd_panel->height *
949 da8xx_lcd_cfg->bpp;
13402868
SB		 950 par->vram_size = par->vram_size * LCD_NUM_BUFFERS / 8;
951
952 par->vram_virt = malloc(par->vram_size);
953
954 par->vram_phys = (dma_addr_t) par->vram_virt;
955 debug("Requesting 0x%x bytes for framebuffer at 0x%x\n",
956 (unsigned int)par->vram_size,
957 (unsigned int)par->vram_virt);
958 if (!par->vram_virt) {
959 printf("GLCD: malloc for frame buffer failed\n");
13402868
SB		 960 goto err_release_fb;
961 }
4e023626 962 gd->fb_base = (int)par->vram_virt;
13402868
SB		 963
964 gpanel.frameAdrs = (unsigned int)par->vram_virt;
965 da8xx_fb_info->screen_base = (char *) par->vram_virt;
966 da8xx_fb_fix.smem_start = gpanel.frameAdrs;
967 da8xx_fb_fix.smem_len = par->vram_size;
765f2f08 968 da8xx_fb_fix.line_length = (lcd_panel->width * da8xx_lcd_cfg->bpp) / 8;
13402868
SB		 969
970 par->dma_start = par->vram_phys;
971 par->dma_end = par->dma_start + lcd_panel->height *
972 da8xx_fb_fix.line_length - 1;
973
974 /* allocate palette buffer */
975 par->v_palette_base = malloc(PALETTE_SIZE);
976 if (!par->v_palette_base) {
977 printf("GLCD: malloc for palette buffer failed\n");
978 goto err_release_fb_mem;
979 }
980 memset(par->v_palette_base, 0, PALETTE_SIZE);
981 par->p_palette_base = (unsigned int)par->v_palette_base;
982
983 /* Initialize par */
765f2f08 984 da8xx_fb_info->var.bits_per_pixel = da8xx_lcd_cfg->bpp;
13402868
SB		 985
986 da8xx_fb_var.xres = lcd_panel->width;
987 da8xx_fb_var.xres_virtual = lcd_panel->width;
988
989 da8xx_fb_var.yres = lcd_panel->height;
990 da8xx_fb_var.yres_virtual = lcd_panel->height * LCD_NUM_BUFFERS;
991
992 da8xx_fb_var.grayscale =
765f2f08
HS		 993 da8xx_lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0;
994 da8xx_fb_var.bits_per_pixel = da8xx_lcd_cfg->bpp;
13402868
SB		 995
996 da8xx_fb_var.hsync_len = lcd_panel->hsw;
997 da8xx_fb_var.vsync_len = lcd_panel->vsw;
998
999 /* Initialize fbinfo */
1000 da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
1001 da8xx_fb_info->fix = da8xx_fb_fix;
1002 da8xx_fb_info->var = da8xx_fb_var;
1003 da8xx_fb_info->pseudo_palette = par->pseudo_palette;
1004 da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
1005 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1006
1007 /* Clear interrupt */
1008 memset((void *)par->vram_virt, 0, par->vram_size);
765f2f08
HS		 1009 lcd_disable_raster(NO_WAIT_FOR_FRAME_DONE);
1010 if (lcd_revision == LCD_VERSION_1)
1011 lcdc_write(0xFFFF, &da8xx_fb_reg_base->stat);
1012 else
1013 lcdc_write(0xFFFF, &da8xx_fb_reg_base->masked_stat);
13402868
SB		 1014 debug("Palette at 0x%x size %d\n", par->p_palette_base,
1015 par->palette_sz);
1016 lcdc_dma_start();
1017
1018 /* Load a default palette */
1019 fb_setcolreg(0, 0, 0, 0, 0xffff, da8xx_fb_info);
1020
1021 /* Check that the palette is loaded */
1022 wait_for_event(LCD_PL_LOAD_DONE);
1023
1024 /* Wait until DMA is working */
1025 wait_for_event(LCD_END_OF_FRAME0);
1026
1027 return (void *)&gpanel;
1028
1029err_release_fb_mem:
1030 free(par->vram_virt);
1031
1032err_release_fb:
1033 free(da8xx_fb_info);
1034
1035 return NULL;
1036}
1037
765f2f08
HS		 1038void da8xx_video_init(const struct da8xx_panel *panel,
1039 const struct lcd_ctrl_config *lcd_cfg, int bits_pixel)
13402868
SB		 1040{
1041 lcd_panel = panel;
765f2f08 1042 da8xx_lcd_cfg = lcd_cfg;
13402868
SB		 1043 bits_x_pixel = bits_pixel;
1044}
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