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Linux 4.18.10
[linux/fpc-iii.git] / drivers / video / fbdev / da8xx-fb.c
bloba74096c53cb50516df5e1415af95e1373f0602b0
1 /*
2 * Copyright (C) 2008-2009 MontaVista Software Inc.
3 * Copyright (C) 2008-2009 Texas Instruments Inc
4 *
5 * Based on the LCD driver for TI Avalanche processors written by
6 * Ajay Singh and Shalom Hai.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option)any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/fb.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/device.h>
27 #include <linux/platform_device.h>
28 #include <linux/uaccess.h>
29 #include <linux/pm_runtime.h>
30 #include <linux/interrupt.h>
31 #include <linux/wait.h>
32 #include <linux/clk.h>
33 #include <linux/cpufreq.h>
34 #include <linux/console.h>
35 #include <linux/spinlock.h>
36 #include <linux/slab.h>
37 #include <linux/delay.h>
38 #include <linux/lcm.h>
39 #include <video/da8xx-fb.h>
40 #include <asm/div64.h>
41
42 #define DRIVER_NAME "da8xx_lcdc"
43
44 #define LCD_VERSION_1 1
45 #define LCD_VERSION_2 2
46
47 /* LCD Status Register */
48 #define LCD_END_OF_FRAME1 BIT(9)
49 #define LCD_END_OF_FRAME0 BIT(8)
50 #define LCD_PL_LOAD_DONE BIT(6)
51 #define LCD_FIFO_UNDERFLOW BIT(5)
52 #define LCD_SYNC_LOST BIT(2)
53 #define LCD_FRAME_DONE BIT(0)
54
55 /* LCD DMA Control Register */
56 #define LCD_DMA_BURST_SIZE(x) ((x) << 4)
57 #define LCD_DMA_BURST_1 0x0
58 #define LCD_DMA_BURST_2 0x1
59 #define LCD_DMA_BURST_4 0x2
60 #define LCD_DMA_BURST_8 0x3
61 #define LCD_DMA_BURST_16 0x4
62 #define LCD_V1_END_OF_FRAME_INT_ENA BIT(2)
63 #define LCD_V2_END_OF_FRAME0_INT_ENA BIT(8)
64 #define LCD_V2_END_OF_FRAME1_INT_ENA BIT(9)
65 #define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0)
66
67 /* LCD Control Register */
68 #define LCD_CLK_DIVISOR(x) ((x) << 8)
69 #define LCD_RASTER_MODE 0x01
70
71 /* LCD Raster Control Register */
72 #define LCD_PALETTE_LOAD_MODE(x) ((x) << 20)
73 #define PALETTE_AND_DATA 0x00
74 #define PALETTE_ONLY 0x01
75 #define DATA_ONLY 0x02
76
77 #define LCD_MONO_8BIT_MODE BIT(9)
78 #define LCD_RASTER_ORDER BIT(8)
79 #define LCD_TFT_MODE BIT(7)
80 #define LCD_V1_UNDERFLOW_INT_ENA BIT(6)
81 #define LCD_V2_UNDERFLOW_INT_ENA BIT(5)
82 #define LCD_V1_PL_INT_ENA BIT(4)
83 #define LCD_V2_PL_INT_ENA BIT(6)
84 #define LCD_MONOCHROME_MODE BIT(1)
85 #define LCD_RASTER_ENABLE BIT(0)
86 #define LCD_TFT_ALT_ENABLE BIT(23)
87 #define LCD_STN_565_ENABLE BIT(24)
88 #define LCD_V2_DMA_CLK_EN BIT(2)
89 #define LCD_V2_LIDD_CLK_EN BIT(1)
90 #define LCD_V2_CORE_CLK_EN BIT(0)
91 #define LCD_V2_LPP_B10 26
92 #define LCD_V2_TFT_24BPP_MODE BIT(25)
93 #define LCD_V2_TFT_24BPP_UNPACK BIT(26)
94
95 /* LCD Raster Timing 2 Register */
96 #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
97 #define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8)
98 #define LCD_SYNC_CTRL BIT(25)
99 #define LCD_SYNC_EDGE BIT(24)
100 #define LCD_INVERT_PIXEL_CLOCK BIT(22)
101 #define LCD_INVERT_LINE_CLOCK BIT(21)
102 #define LCD_INVERT_FRAME_CLOCK BIT(20)
103
104 /* LCD Block */
105 #define LCD_PID_REG 0x0
106 #define LCD_CTRL_REG 0x4
107 #define LCD_STAT_REG 0x8
108 #define LCD_RASTER_CTRL_REG 0x28
109 #define LCD_RASTER_TIMING_0_REG 0x2C
110 #define LCD_RASTER_TIMING_1_REG 0x30
111 #define LCD_RASTER_TIMING_2_REG 0x34
112 #define LCD_DMA_CTRL_REG 0x40
113 #define LCD_DMA_FRM_BUF_BASE_ADDR_0_REG 0x44
114 #define LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG 0x48
115 #define LCD_DMA_FRM_BUF_BASE_ADDR_1_REG 0x4C
116 #define LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG 0x50
117
118 /* Interrupt Registers available only in Version 2 */
119 #define LCD_RAW_STAT_REG 0x58
120 #define LCD_MASKED_STAT_REG 0x5c
121 #define LCD_INT_ENABLE_SET_REG 0x60
122 #define LCD_INT_ENABLE_CLR_REG 0x64
123 #define LCD_END_OF_INT_IND_REG 0x68
124
125 /* Clock registers available only on Version 2 */
126 #define LCD_CLK_ENABLE_REG 0x6c
127 #define LCD_CLK_RESET_REG 0x70
128 #define LCD_CLK_MAIN_RESET BIT(3)
129
130 #define LCD_NUM_BUFFERS 2
131
132 #define PALETTE_SIZE 256
133
134 #define CLK_MIN_DIV 2
135 #define CLK_MAX_DIV 255
136
137 static void __iomem *da8xx_fb_reg_base;
138 static unsigned int lcd_revision;
139 static irq_handler_t lcdc_irq_handler;
140 static wait_queue_head_t frame_done_wq;
141 static int frame_done_flag;
142
143 static unsigned int lcdc_read(unsigned int addr)
144 {
145 return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr));
146 }
147
148 static void lcdc_write(unsigned int val, unsigned int addr)
149 {
150 __raw_writel(val, da8xx_fb_reg_base + (addr));
151 }
152
153 struct da8xx_fb_par {
154 struct device *dev;
155 dma_addr_t p_palette_base;
156 unsigned char *v_palette_base;
157 dma_addr_t vram_phys;
158 unsigned long vram_size;
159 void *vram_virt;
160 unsigned int dma_start;
161 unsigned int dma_end;
162 struct clk *lcdc_clk;
163 int irq;
164 unsigned int palette_sz;
165 int blank;
166 wait_queue_head_t vsync_wait;
167 int vsync_flag;
168 int vsync_timeout;
169 spinlock_t lock_for_chan_update;
170
171 /*
172 * LCDC has 2 ping pong DMA channels, channel 0
173 * and channel 1.
174 */
175 unsigned int which_dma_channel_done;
176 #ifdef CONFIG_CPU_FREQ
177 struct notifier_block freq_transition;
178 #endif
179 unsigned int lcdc_clk_rate;
180 void (*panel_power_ctrl)(int);
181 u32 pseudo_palette[16];
182 struct fb_videomode mode;
183 struct lcd_ctrl_config cfg;
184 };
185
186 static struct fb_var_screeninfo da8xx_fb_var;
187
188 static struct fb_fix_screeninfo da8xx_fb_fix = {
189 .id = "DA8xx FB Drv",
190 .type = FB_TYPE_PACKED_PIXELS,
191 .type_aux = 0,
192 .visual = FB_VISUAL_PSEUDOCOLOR,
193 .xpanstep = 0,
194 .ypanstep = 1,
195 .ywrapstep = 0,
196 .accel = FB_ACCEL_NONE
197 };
198
199 static struct fb_videomode known_lcd_panels[] = {
200 /* Sharp LCD035Q3DG01 */
201 [0] = {
202 .name = "Sharp_LCD035Q3DG01",
203 .xres = 320,
204 .yres = 240,
205 .pixclock = KHZ2PICOS(4607),
206 .left_margin = 6,
207 .right_margin = 8,
208 .upper_margin = 2,
209 .lower_margin = 2,
210 .hsync_len = 0,
211 .vsync_len = 0,
212 .sync = FB_SYNC_CLK_INVERT,
213 },
214 /* Sharp LK043T1DG01 */
215 [1] = {
216 .name = "Sharp_LK043T1DG01",
217 .xres = 480,
218 .yres = 272,
219 .pixclock = KHZ2PICOS(7833),
220 .left_margin = 2,
221 .right_margin = 2,
222 .upper_margin = 2,
223 .lower_margin = 2,
224 .hsync_len = 41,
225 .vsync_len = 10,
226 .sync = 0,
227 .flag = 0,
228 },
229 [2] = {
230 /* Hitachi SP10Q010 */
231 .name = "SP10Q010",
232 .xres = 320,
233 .yres = 240,
234 .pixclock = KHZ2PICOS(7833),
235 .left_margin = 10,
236 .right_margin = 10,
237 .upper_margin = 10,
238 .lower_margin = 10,
239 .hsync_len = 10,
240 .vsync_len = 10,
241 .sync = 0,
242 .flag = 0,
243 },
244 [3] = {
245 /* Densitron 84-0023-001T */
246 .name = "Densitron_84-0023-001T",
247 .xres = 320,
248 .yres = 240,
249 .pixclock = KHZ2PICOS(6400),
250 .left_margin = 0,
251 .right_margin = 0,
252 .upper_margin = 0,
253 .lower_margin = 0,
254 .hsync_len = 30,
255 .vsync_len = 3,
256 .sync = 0,
257 },
258 };
259
260 static bool da8xx_fb_is_raster_enabled(void)
261 {
262 return !!(lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE);
263 }
264
265 /* Enable the Raster Engine of the LCD Controller */
266 static void lcd_enable_raster(void)
267 {
268 u32 reg;
269
270 /* Put LCDC in reset for several cycles */
271 if (lcd_revision == LCD_VERSION_2)
272 /* Write 1 to reset LCDC */
273 lcdc_write(LCD_CLK_MAIN_RESET, LCD_CLK_RESET_REG);
274 mdelay(1);
275
276 /* Bring LCDC out of reset */
277 if (lcd_revision == LCD_VERSION_2)
278 lcdc_write(0, LCD_CLK_RESET_REG);
279 mdelay(1);
280
281 /* Above reset sequence doesnot reset register context */
282 reg = lcdc_read(LCD_RASTER_CTRL_REG);
283 if (!(reg & LCD_RASTER_ENABLE))
284 lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
285 }
286
287 /* Disable the Raster Engine of the LCD Controller */
288 static void lcd_disable_raster(enum da8xx_frame_complete wait_for_frame_done)
289 {
290 u32 reg;
291 int ret;
292
293 reg = lcdc_read(LCD_RASTER_CTRL_REG);
294 if (reg & LCD_RASTER_ENABLE)
295 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
296 else
297 /* return if already disabled */
298 return;
299
300 if ((wait_for_frame_done == DA8XX_FRAME_WAIT) &&
301 (lcd_revision == LCD_VERSION_2)) {
302 frame_done_flag = 0;
303 ret = wait_event_interruptible_timeout(frame_done_wq,
304 frame_done_flag != 0,
305 msecs_to_jiffies(50));
306 if (ret == 0)
307 pr_err("LCD Controller timed out\n");
308 }
309 }
310
311 static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
312 {
313 u32 start;
314 u32 end;
315 u32 reg_ras;
316 u32 reg_dma;
317 u32 reg_int;
318
319 /* init reg to clear PLM (loading mode) fields */
320 reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
321 reg_ras &= ~(3 << 20);
322
323 reg_dma = lcdc_read(LCD_DMA_CTRL_REG);
324
325 if (load_mode == LOAD_DATA) {
326 start = par->dma_start;
327 end = par->dma_end;
328
329 reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY);
330 if (lcd_revision == LCD_VERSION_1) {
331 reg_dma |= LCD_V1_END_OF_FRAME_INT_ENA;
332 } else {
333 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
334 LCD_V2_END_OF_FRAME0_INT_ENA |
335 LCD_V2_END_OF_FRAME1_INT_ENA |
336 LCD_FRAME_DONE | LCD_SYNC_LOST;
337 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
338 }
339 reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
340
341 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
342 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
343 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
344 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
345 } else if (load_mode == LOAD_PALETTE) {
346 start = par->p_palette_base;
347 end = start + par->palette_sz - 1;
348
349 reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
350
351 if (lcd_revision == LCD_VERSION_1) {
352 reg_ras |= LCD_V1_PL_INT_ENA;
353 } else {
354 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
355 LCD_V2_PL_INT_ENA;
356 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
357 }
358
359 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
360 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
361 }
362
363 lcdc_write(reg_dma, LCD_DMA_CTRL_REG);
364 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
365
366 /*
367 * The Raster enable bit must be set after all other control fields are
368 * set.
369 */
370 lcd_enable_raster();
371 }
372
373 /* Configure the Burst Size and fifo threhold of DMA */
374 static int lcd_cfg_dma(int burst_size, int fifo_th)
375 {
376 u32 reg;
377
378 reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001;
379 switch (burst_size) {
380 case 1:
381 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
382 break;
383 case 2:
384 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
385 break;
386 case 4:
387 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
388 break;
389 case 8:
390 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
391 break;
392 case 16:
393 default:
394 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
395 break;
396 }
397
398 reg |= (fifo_th << 8);
399
400 lcdc_write(reg, LCD_DMA_CTRL_REG);
401
402 return 0;
403 }
404
405 static void lcd_cfg_ac_bias(int period, int transitions_per_int)
406 {
407 u32 reg;
408
409 /* Set the AC Bias Period and Number of Transisitons per Interrupt */
410 reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000;
411 reg |= LCD_AC_BIAS_FREQUENCY(period) |
412 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
413 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
414 }
415
416 static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
417 int front_porch)
418 {
419 u32 reg;
420
421 reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0x3ff;
422 reg |= (((back_porch-1) & 0xff) << 24)
423 | (((front_porch-1) & 0xff) << 16)
424 | (((pulse_width-1) & 0x3f) << 10);
425 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
426
427 /*
428 * LCDC Version 2 adds some extra bits that increase the allowable
429 * size of the horizontal timing registers.
430 * remember that the registers use 0 to represent 1 so all values
431 * that get set into register need to be decremented by 1
432 */
433 if (lcd_revision == LCD_VERSION_2) {
434 /* Mask off the bits we want to change */
435 reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & ~0x780000ff;
436 reg |= ((front_porch-1) & 0x300) >> 8;
437 reg |= ((back_porch-1) & 0x300) >> 4;
438 reg |= ((pulse_width-1) & 0x3c0) << 21;
439 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
440 }
441 }
442
443 static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
444 int front_porch)
445 {
446 u32 reg;
447
448 reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
449 reg |= ((back_porch & 0xff) << 24)
450 | ((front_porch & 0xff) << 16)
451 | (((pulse_width-1) & 0x3f) << 10);
452 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
453 }
454
455 static int lcd_cfg_display(const struct lcd_ctrl_config *cfg,
456 struct fb_videomode *panel)
457 {
458 u32 reg;
459 u32 reg_int;
460
461 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE |
462 LCD_MONO_8BIT_MODE |
463 LCD_MONOCHROME_MODE);
464
465 switch (cfg->panel_shade) {
466 case MONOCHROME:
467 reg |= LCD_MONOCHROME_MODE;
468 if (cfg->mono_8bit_mode)
469 reg |= LCD_MONO_8BIT_MODE;
470 break;
471 case COLOR_ACTIVE:
472 reg |= LCD_TFT_MODE;
473 if (cfg->tft_alt_mode)
474 reg |= LCD_TFT_ALT_ENABLE;
475 break;
476
477 case COLOR_PASSIVE:
478 /* AC bias applicable only for Pasive panels */
479 lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
480 if (cfg->bpp == 12 && cfg->stn_565_mode)
481 reg |= LCD_STN_565_ENABLE;
482 break;
483
484 default:
485 return -EINVAL;
486 }
487
488 /* enable additional interrupts here */
489 if (lcd_revision == LCD_VERSION_1) {
490 reg |= LCD_V1_UNDERFLOW_INT_ENA;
491 } else {
492 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
493 LCD_V2_UNDERFLOW_INT_ENA;
494 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
495 }
496
497 lcdc_write(reg, LCD_RASTER_CTRL_REG);
498
499 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
500
501 reg |= LCD_SYNC_CTRL;
502
503 if (cfg->sync_edge)
504 reg |= LCD_SYNC_EDGE;
505 else
506 reg &= ~LCD_SYNC_EDGE;
507
508 if ((panel->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
509 reg |= LCD_INVERT_LINE_CLOCK;
510 else
511 reg &= ~LCD_INVERT_LINE_CLOCK;
512
513 if ((panel->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
514 reg |= LCD_INVERT_FRAME_CLOCK;
515 else
516 reg &= ~LCD_INVERT_FRAME_CLOCK;
517
518 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
519
520 return 0;
521 }
522
523 static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
524 u32 bpp, u32 raster_order)
525 {
526 u32 reg;
527
528 if (bpp > 16 && lcd_revision == LCD_VERSION_1)
529 return -EINVAL;
530
531 /* Set the Panel Width */
532 /* Pixels per line = (PPL + 1)*16 */
533 if (lcd_revision == LCD_VERSION_1) {
534 /*
535 * 0x3F in bits 4..9 gives max horizontal resolution = 1024
536 * pixels.
537 */
538 width &= 0x3f0;
539 } else {
540 /*
541 * 0x7F in bits 4..10 gives max horizontal resolution = 2048
542 * pixels.
543 */
544 width &= 0x7f0;
545 }
546
547 reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
548 reg &= 0xfffffc00;
549 if (lcd_revision == LCD_VERSION_1) {
550 reg |= ((width >> 4) - 1) << 4;
551 } else {
552 width = (width >> 4) - 1;
553 reg |= ((width & 0x3f) << 4) | ((width & 0x40) >> 3);
554 }
555 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
556
557 /* Set the Panel Height */
558 /* Set bits 9:0 of Lines Per Pixel */
559 reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
560 reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
561 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
562
563 /* Set bit 10 of Lines Per Pixel */
564 if (lcd_revision == LCD_VERSION_2) {
565 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
566 reg |= ((height - 1) & 0x400) << 16;
567 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
568 }
569
570 /* Set the Raster Order of the Frame Buffer */
571 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
572 if (raster_order)
573 reg |= LCD_RASTER_ORDER;
574
575 par->palette_sz = 16 * 2;
576
577 switch (bpp) {
578 case 1:
579 case 2:
580 case 4:
581 case 16:
582 break;
583 case 24:
584 reg |= LCD_V2_TFT_24BPP_MODE;
585 break;
586 case 32:
587 reg |= LCD_V2_TFT_24BPP_MODE;
588 reg |= LCD_V2_TFT_24BPP_UNPACK;
589 break;
590 case 8:
591 par->palette_sz = 256 * 2;
592 break;
593
594 default:
595 return -EINVAL;
596 }
597
598 lcdc_write(reg, LCD_RASTER_CTRL_REG);
599
600 return 0;
601 }
602
603 #define CNVT_TOHW(val, width) ((((val) << (width)) + 0x7FFF - (val)) >> 16)
604 static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
605 unsigned blue, unsigned transp,
606 struct fb_info *info)
607 {
608 struct da8xx_fb_par *par = info->par;
609 unsigned short *palette = (unsigned short *) par->v_palette_base;
610 u_short pal;
611 int update_hw = 0;
612
613 if (regno > 255)
614 return 1;
615
616 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
617 return 1;
618
619 if (info->var.bits_per_pixel > 16 && lcd_revision == LCD_VERSION_1)
620 return -EINVAL;
621
622 switch (info->fix.visual) {
623 case FB_VISUAL_TRUECOLOR:
624 red = CNVT_TOHW(red, info->var.red.length);
625 green = CNVT_TOHW(green, info->var.green.length);
626 blue = CNVT_TOHW(blue, info->var.blue.length);
627 break;
628 case FB_VISUAL_PSEUDOCOLOR:
629 switch (info->var.bits_per_pixel) {
630 case 4:
631 if (regno > 15)
632 return -EINVAL;
633
634 if (info->var.grayscale) {
635 pal = regno;
636 } else {
637 red >>= 4;
638 green >>= 8;
639 blue >>= 12;
640
641 pal = red & 0x0f00;
642 pal |= green & 0x00f0;
643 pal |= blue & 0x000f;
644 }
645 if (regno == 0)
646 pal |= 0x2000;
647 palette[regno] = pal;
648 break;
649
650 case 8:
651 red >>= 4;
652 green >>= 8;
653 blue >>= 12;
654
655 pal = (red & 0x0f00);
656 pal |= (green & 0x00f0);
657 pal |= (blue & 0x000f);
658
659 if (palette[regno] != pal) {
660 update_hw = 1;
661 palette[regno] = pal;
662 }
663 break;
664 }
665 break;
666 }
667
668 /* Truecolor has hardware independent palette */
669 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
670 u32 v;
671
672 if (regno > 15)
673 return -EINVAL;
674
675 v = (red << info->var.red.offset) |
676 (green << info->var.green.offset) |
677 (blue << info->var.blue.offset);
678
679 ((u32 *) (info->pseudo_palette))[regno] = v;
680 if (palette[0] != 0x4000) {
681 update_hw = 1;
682 palette[0] = 0x4000;
683 }
684 }
685
686 /* Update the palette in the h/w as needed. */
687 if (update_hw)
688 lcd_blit(LOAD_PALETTE, par);
689
690 return 0;
691 }
692 #undef CNVT_TOHW
693
694 static void da8xx_fb_lcd_reset(void)
695 {
696 /* DMA has to be disabled */
697 lcdc_write(0, LCD_DMA_CTRL_REG);
698 lcdc_write(0, LCD_RASTER_CTRL_REG);
699
700 if (lcd_revision == LCD_VERSION_2) {
701 lcdc_write(0, LCD_INT_ENABLE_SET_REG);
702 /* Write 1 to reset */
703 lcdc_write(LCD_CLK_MAIN_RESET, LCD_CLK_RESET_REG);
704 lcdc_write(0, LCD_CLK_RESET_REG);
705 }
706 }
707
708 static int da8xx_fb_config_clk_divider(struct da8xx_fb_par *par,
709 unsigned lcdc_clk_div,
710 unsigned lcdc_clk_rate)
711 {
712 int ret;
713
714 if (par->lcdc_clk_rate != lcdc_clk_rate) {
715 ret = clk_set_rate(par->lcdc_clk, lcdc_clk_rate);
716 if (ret) {
717 dev_err(par->dev,
718 "unable to set clock rate at %u\n",
719 lcdc_clk_rate);
720 return ret;
721 }
722 par->lcdc_clk_rate = clk_get_rate(par->lcdc_clk);
723 }
724
725 /* Configure the LCD clock divisor. */
726 lcdc_write(LCD_CLK_DIVISOR(lcdc_clk_div) |
727 (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
728
729 if (lcd_revision == LCD_VERSION_2)
730 lcdc_write(LCD_V2_DMA_CLK_EN | LCD_V2_LIDD_CLK_EN |
731 LCD_V2_CORE_CLK_EN, LCD_CLK_ENABLE_REG);
732
733 return 0;
734 }
735
736 static unsigned int da8xx_fb_calc_clk_divider(struct da8xx_fb_par *par,
737 unsigned pixclock,
738 unsigned *lcdc_clk_rate)
739 {
740 unsigned lcdc_clk_div;
741
742 pixclock = PICOS2KHZ(pixclock) * 1000;
743
744 *lcdc_clk_rate = par->lcdc_clk_rate;
745
746 if (pixclock < (*lcdc_clk_rate / CLK_MAX_DIV)) {
747 *lcdc_clk_rate = clk_round_rate(par->lcdc_clk,
748 pixclock * CLK_MAX_DIV);
749 lcdc_clk_div = CLK_MAX_DIV;
750 } else if (pixclock > (*lcdc_clk_rate / CLK_MIN_DIV)) {
751 *lcdc_clk_rate = clk_round_rate(par->lcdc_clk,
752 pixclock * CLK_MIN_DIV);
753 lcdc_clk_div = CLK_MIN_DIV;
754 } else {
755 lcdc_clk_div = *lcdc_clk_rate / pixclock;
756 }
757
758 return lcdc_clk_div;
759 }
760
761 static int da8xx_fb_calc_config_clk_divider(struct da8xx_fb_par *par,
762 struct fb_videomode *mode)
763 {
764 unsigned lcdc_clk_rate;
765 unsigned lcdc_clk_div = da8xx_fb_calc_clk_divider(par, mode->pixclock,
766 &lcdc_clk_rate);
767
768 return da8xx_fb_config_clk_divider(par, lcdc_clk_div, lcdc_clk_rate);
769 }
770
771 static unsigned da8xx_fb_round_clk(struct da8xx_fb_par *par,
772 unsigned pixclock)
773 {
774 unsigned lcdc_clk_div, lcdc_clk_rate;
775
776 lcdc_clk_div = da8xx_fb_calc_clk_divider(par, pixclock, &lcdc_clk_rate);
777 return KHZ2PICOS(lcdc_clk_rate / (1000 * lcdc_clk_div));
778 }
779
780 static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
781 struct fb_videomode *panel)
782 {
783 u32 bpp;
784 int ret = 0;
785
786 ret = da8xx_fb_calc_config_clk_divider(par, panel);
787 if (ret) {
788 dev_err(par->dev, "unable to configure clock\n");
789 return ret;
790 }
791
792 if (panel->sync & FB_SYNC_CLK_INVERT)
793 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
794 LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
795 else
796 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
797 ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
798
799 /* Configure the DMA burst size and fifo threshold. */
800 ret = lcd_cfg_dma(cfg->dma_burst_sz, cfg->fifo_th);
801 if (ret < 0)
802 return ret;
803
804 /* Configure the vertical and horizontal sync properties. */
805 lcd_cfg_vertical_sync(panel->upper_margin, panel->vsync_len,
806 panel->lower_margin);
807 lcd_cfg_horizontal_sync(panel->left_margin, panel->hsync_len,
808 panel->right_margin);
809
810 /* Configure for disply */
811 ret = lcd_cfg_display(cfg, panel);
812 if (ret < 0)
813 return ret;
814
815 bpp = cfg->bpp;
816
817 if (bpp == 12)
818 bpp = 16;
819 ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->xres,
820 (unsigned int)panel->yres, bpp,
821 cfg->raster_order);
822 if (ret < 0)
823 return ret;
824
825 /* Configure FDD */
826 lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) |
827 (cfg->fdd << 12), LCD_RASTER_CTRL_REG);
828
829 return 0;
830 }
831
832 /* IRQ handler for version 2 of LCDC */
833 static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg)
834 {
835 struct da8xx_fb_par *par = arg;
836 u32 stat = lcdc_read(LCD_MASKED_STAT_REG);
837
838 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
839 lcd_disable_raster(DA8XX_FRAME_NOWAIT);
840 lcdc_write(stat, LCD_MASKED_STAT_REG);
841 lcd_enable_raster();
842 } else if (stat & LCD_PL_LOAD_DONE) {
843 /*
844 * Must disable raster before changing state of any control bit.
845 * And also must be disabled before clearing the PL loading
846 * interrupt via the following write to the status register. If
847 * this is done after then one gets multiple PL done interrupts.
848 */
849 lcd_disable_raster(DA8XX_FRAME_NOWAIT);
850
851 lcdc_write(stat, LCD_MASKED_STAT_REG);
852
853 /* Disable PL completion interrupt */
854 lcdc_write(LCD_V2_PL_INT_ENA, LCD_INT_ENABLE_CLR_REG);
855
856 /* Setup and start data loading mode */
857 lcd_blit(LOAD_DATA, par);
858 } else {
859 lcdc_write(stat, LCD_MASKED_STAT_REG);
860
861 if (stat & LCD_END_OF_FRAME0) {
862 par->which_dma_channel_done = 0;
863 lcdc_write(par->dma_start,
864 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
865 lcdc_write(par->dma_end,
866 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
867 par->vsync_flag = 1;
868 wake_up_interruptible(&par->vsync_wait);
869 }
870
871 if (stat & LCD_END_OF_FRAME1) {
872 par->which_dma_channel_done = 1;
873 lcdc_write(par->dma_start,
874 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
875 lcdc_write(par->dma_end,
876 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
877 par->vsync_flag = 1;
878 wake_up_interruptible(&par->vsync_wait);
879 }
880
881 /* Set only when controller is disabled and at the end of
882 * active frame
883 */
884 if (stat & BIT(0)) {
885 frame_done_flag = 1;
886 wake_up_interruptible(&frame_done_wq);
887 }
888 }
889
890 lcdc_write(0, LCD_END_OF_INT_IND_REG);
891 return IRQ_HANDLED;
892 }
893
894 /* IRQ handler for version 1 LCDC */
895 static irqreturn_t lcdc_irq_handler_rev01(int irq, void *arg)
896 {
897 struct da8xx_fb_par *par = arg;
898 u32 stat = lcdc_read(LCD_STAT_REG);
899 u32 reg_ras;
900
901 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
902 lcd_disable_raster(DA8XX_FRAME_NOWAIT);
903 lcdc_write(stat, LCD_STAT_REG);
904 lcd_enable_raster();
905 } else if (stat & LCD_PL_LOAD_DONE) {
906 /*
907 * Must disable raster before changing state of any control bit.
908 * And also must be disabled before clearing the PL loading
909 * interrupt via the following write to the status register. If
910 * this is done after then one gets multiple PL done interrupts.
911 */
912 lcd_disable_raster(DA8XX_FRAME_NOWAIT);
913
914 lcdc_write(stat, LCD_STAT_REG);
915
916 /* Disable PL completion inerrupt */
917 reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
918 reg_ras &= ~LCD_V1_PL_INT_ENA;
919 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
920
921 /* Setup and start data loading mode */
922 lcd_blit(LOAD_DATA, par);
923 } else {
924 lcdc_write(stat, LCD_STAT_REG);
925
926 if (stat & LCD_END_OF_FRAME0) {
927 par->which_dma_channel_done = 0;
928 lcdc_write(par->dma_start,
929 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
930 lcdc_write(par->dma_end,
931 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
932 par->vsync_flag = 1;
933 wake_up_interruptible(&par->vsync_wait);
934 }
935
936 if (stat & LCD_END_OF_FRAME1) {
937 par->which_dma_channel_done = 1;
938 lcdc_write(par->dma_start,
939 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
940 lcdc_write(par->dma_end,
941 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
942 par->vsync_flag = 1;
943 wake_up_interruptible(&par->vsync_wait);
944 }
945 }
946
947 return IRQ_HANDLED;
948 }
949
950 static int fb_check_var(struct fb_var_screeninfo *var,
951 struct fb_info *info)
952 {
953 int err = 0;
954 struct da8xx_fb_par *par = info->par;
955 int bpp = var->bits_per_pixel >> 3;
956 unsigned long line_size = var->xres_virtual * bpp;
957
958 if (var->bits_per_pixel > 16 && lcd_revision == LCD_VERSION_1)
959 return -EINVAL;
960
961 switch (var->bits_per_pixel) {
962 case 1:
963 case 8:
964 var->red.offset = 0;
965 var->red.length = 8;
966 var->green.offset = 0;
967 var->green.length = 8;
968 var->blue.offset = 0;
969 var->blue.length = 8;
970 var->transp.offset = 0;
971 var->transp.length = 0;
972 var->nonstd = 0;
973 break;
974 case 4:
975 var->red.offset = 0;
976 var->red.length = 4;
977 var->green.offset = 0;
978 var->green.length = 4;
979 var->blue.offset = 0;
980 var->blue.length = 4;
981 var->transp.offset = 0;
982 var->transp.length = 0;
983 var->nonstd = FB_NONSTD_REV_PIX_IN_B;
984 break;
985 case 16: /* RGB 565 */
986 var->red.offset = 11;
987 var->red.length = 5;
988 var->green.offset = 5;
989 var->green.length = 6;
990 var->blue.offset = 0;
991 var->blue.length = 5;
992 var->transp.offset = 0;
993 var->transp.length = 0;
994 var->nonstd = 0;
995 break;
996 case 24:
997 var->red.offset = 16;
998 var->red.length = 8;
999 var->green.offset = 8;
1000 var->green.length = 8;
1001 var->blue.offset = 0;
1002 var->blue.length = 8;
1003 var->nonstd = 0;
1004 break;
1005 case 32:
1006 var->transp.offset = 24;
1007 var->transp.length = 8;
1008 var->red.offset = 16;
1009 var->red.length = 8;
1010 var->green.offset = 8;
1011 var->green.length = 8;
1012 var->blue.offset = 0;
1013 var->blue.length = 8;
1014 var->nonstd = 0;
1015 break;
1016 default:
1017 err = -EINVAL;
1018 }
1019
1020 var->red.msb_right = 0;
1021 var->green.msb_right = 0;
1022 var->blue.msb_right = 0;
1023 var->transp.msb_right = 0;
1024
1025 if (line_size * var->yres_virtual > par->vram_size)
1026 var->yres_virtual = par->vram_size / line_size;
1027
1028 if (var->yres > var->yres_virtual)
1029 var->yres = var->yres_virtual;
1030
1031 if (var->xres > var->xres_virtual)
1032 var->xres = var->xres_virtual;
1033
1034 if (var->xres + var->xoffset > var->xres_virtual)
1035 var->xoffset = var->xres_virtual - var->xres;
1036 if (var->yres + var->yoffset > var->yres_virtual)
1037 var->yoffset = var->yres_virtual - var->yres;
1038
1039 var->pixclock = da8xx_fb_round_clk(par, var->pixclock);
1040
1041 return err;
1042 }
1043
1044 #ifdef CONFIG_CPU_FREQ
1045 static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
1046 unsigned long val, void *data)
1047 {
1048 struct da8xx_fb_par *par;
1049
1050 par = container_of(nb, struct da8xx_fb_par, freq_transition);
1051 if (val == CPUFREQ_POSTCHANGE) {
1052 if (par->lcdc_clk_rate != clk_get_rate(par->lcdc_clk)) {
1053 par->lcdc_clk_rate = clk_get_rate(par->lcdc_clk);
1054 lcd_disable_raster(DA8XX_FRAME_WAIT);
1055 da8xx_fb_calc_config_clk_divider(par, &par->mode);
1056 if (par->blank == FB_BLANK_UNBLANK)
1057 lcd_enable_raster();
1058 }
1059 }
1060
1061 return 0;
1062 }
1063
1064 static int lcd_da8xx_cpufreq_register(struct da8xx_fb_par *par)
1065 {
1066 par->freq_transition.notifier_call = lcd_da8xx_cpufreq_transition;
1067
1068 return cpufreq_register_notifier(&par->freq_transition,
1069 CPUFREQ_TRANSITION_NOTIFIER);
1070 }
1071
1072 static void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par)
1073 {
1074 cpufreq_unregister_notifier(&par->freq_transition,
1075 CPUFREQ_TRANSITION_NOTIFIER);
1076 }
1077 #endif
1078
1079 static int fb_remove(struct platform_device *dev)
1080 {
1081 struct fb_info *info = dev_get_drvdata(&dev->dev);
1082
1083 if (info) {
1084 struct da8xx_fb_par *par = info->par;
1085
1086 #ifdef CONFIG_CPU_FREQ
1087 lcd_da8xx_cpufreq_deregister(par);
1088 #endif
1089 if (par->panel_power_ctrl)
1090 par->panel_power_ctrl(0);
1091
1092 lcd_disable_raster(DA8XX_FRAME_WAIT);
1093 lcdc_write(0, LCD_RASTER_CTRL_REG);
1094
1095 /* disable DMA */
1096 lcdc_write(0, LCD_DMA_CTRL_REG);
1097
1098 unregister_framebuffer(info);
1099 fb_dealloc_cmap(&info->cmap);
1100 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
1101 par->p_palette_base);
1102 dma_free_coherent(NULL, par->vram_size, par->vram_virt,
1103 par->vram_phys);
1104 pm_runtime_put_sync(&dev->dev);
1105 pm_runtime_disable(&dev->dev);
1106 framebuffer_release(info);
1107
1108 }
1109 return 0;
1110 }
1111
1112 /*
1113 * Function to wait for vertical sync which for this LCD peripheral
1114 * translates into waiting for the current raster frame to complete.
1115 */
1116 static int fb_wait_for_vsync(struct fb_info *info)
1117 {
1118 struct da8xx_fb_par *par = info->par;
1119 int ret;
1120
1121 /*
1122 * Set flag to 0 and wait for isr to set to 1. It would seem there is a
1123 * race condition here where the ISR could have occurred just before or
1124 * just after this set. But since we are just coarsely waiting for
1125 * a frame to complete then that's OK. i.e. if the frame completed
1126 * just before this code executed then we have to wait another full
1127 * frame time but there is no way to avoid such a situation. On the
1128 * other hand if the frame completed just after then we don't need
1129 * to wait long at all. Either way we are guaranteed to return to the
1130 * user immediately after a frame completion which is all that is
1131 * required.
1132 */
1133 par->vsync_flag = 0;
1134 ret = wait_event_interruptible_timeout(par->vsync_wait,
1135 par->vsync_flag != 0,
1136 par->vsync_timeout);
1137 if (ret < 0)
1138 return ret;
1139 if (ret == 0)
1140 return -ETIMEDOUT;
1141
1142 return 0;
1143 }
1144
1145 static int fb_ioctl(struct fb_info *info, unsigned int cmd,
1146 unsigned long arg)
1147 {
1148 struct lcd_sync_arg sync_arg;
1149
1150 switch (cmd) {
1151 case FBIOGET_CONTRAST:
1152 case FBIOPUT_CONTRAST:
1153 case FBIGET_BRIGHTNESS:
1154 case FBIPUT_BRIGHTNESS:
1155 case FBIGET_COLOR:
1156 case FBIPUT_COLOR:
1157 return -ENOTTY;
1158 case FBIPUT_HSYNC:
1159 if (copy_from_user(&sync_arg, (char *)arg,
1160 sizeof(struct lcd_sync_arg)))
1161 return -EFAULT;
1162 lcd_cfg_horizontal_sync(sync_arg.back_porch,
1163 sync_arg.pulse_width,
1164 sync_arg.front_porch);
1165 break;
1166 case FBIPUT_VSYNC:
1167 if (copy_from_user(&sync_arg, (char *)arg,
1168 sizeof(struct lcd_sync_arg)))
1169 return -EFAULT;
1170 lcd_cfg_vertical_sync(sync_arg.back_porch,
1171 sync_arg.pulse_width,
1172 sync_arg.front_porch);
1173 break;
1174 case FBIO_WAITFORVSYNC:
1175 return fb_wait_for_vsync(info);
1176 default:
1177 return -EINVAL;
1178 }
1179 return 0;
1180 }
1181
1182 static int cfb_blank(int blank, struct fb_info *info)
1183 {
1184 struct da8xx_fb_par *par = info->par;
1185 int ret = 0;
1186
1187 if (par->blank == blank)
1188 return 0;
1189
1190 par->blank = blank;
1191 switch (blank) {
1192 case FB_BLANK_UNBLANK:
1193 lcd_enable_raster();
1194
1195 if (par->panel_power_ctrl)
1196 par->panel_power_ctrl(1);
1197 break;
1198 case FB_BLANK_NORMAL:
1199 case FB_BLANK_VSYNC_SUSPEND:
1200 case FB_BLANK_HSYNC_SUSPEND:
1201 case FB_BLANK_POWERDOWN:
1202 if (par->panel_power_ctrl)
1203 par->panel_power_ctrl(0);
1204
1205 lcd_disable_raster(DA8XX_FRAME_WAIT);
1206 break;
1207 default:
1208 ret = -EINVAL;
1209 }
1210
1211 return ret;
1212 }
1213
1214 /*
1215 * Set new x,y offsets in the virtual display for the visible area and switch
1216 * to the new mode.
1217 */
1218 static int da8xx_pan_display(struct fb_var_screeninfo *var,
1219 struct fb_info *fbi)
1220 {
1221 int ret = 0;
1222 struct fb_var_screeninfo new_var;
1223 struct da8xx_fb_par *par = fbi->par;
1224 struct fb_fix_screeninfo *fix = &fbi->fix;
1225 unsigned int end;
1226 unsigned int start;
1227 unsigned long irq_flags;
1228
1229 if (var->xoffset != fbi->var.xoffset ||
1230 var->yoffset != fbi->var.yoffset) {
1231 memcpy(&new_var, &fbi->var, sizeof(new_var));
1232 new_var.xoffset = var->xoffset;
1233 new_var.yoffset = var->yoffset;
1234 if (fb_check_var(&new_var, fbi))
1235 ret = -EINVAL;
1236 else {
1237 memcpy(&fbi->var, &new_var, sizeof(new_var));
1238
1239 start = fix->smem_start +
1240 new_var.yoffset * fix->line_length +
1241 new_var.xoffset * fbi->var.bits_per_pixel / 8;
1242 end = start + fbi->var.yres * fix->line_length - 1;
1243 par->dma_start = start;
1244 par->dma_end = end;
1245 spin_lock_irqsave(&par->lock_for_chan_update,
1246 irq_flags);
1247 if (par->which_dma_channel_done == 0) {
1248 lcdc_write(par->dma_start,
1249 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
1250 lcdc_write(par->dma_end,
1251 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
1252 } else if (par->which_dma_channel_done == 1) {
1253 lcdc_write(par->dma_start,
1254 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
1255 lcdc_write(par->dma_end,
1256 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
1257 }
1258 spin_unlock_irqrestore(&par->lock_for_chan_update,
1259 irq_flags);
1260 }
1261 }
1262
1263 return ret;
1264 }
1265
1266 static int da8xxfb_set_par(struct fb_info *info)
1267 {
1268 struct da8xx_fb_par *par = info->par;
1269 int ret;
1270 bool raster = da8xx_fb_is_raster_enabled();
1271
1272 if (raster)
1273 lcd_disable_raster(DA8XX_FRAME_WAIT);
1274
1275 fb_var_to_videomode(&par->mode, &info->var);
1276
1277 par->cfg.bpp = info->var.bits_per_pixel;
1278
1279 info->fix.visual = (par->cfg.bpp <= 8) ?
1280 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1281 info->fix.line_length = (par->mode.xres * par->cfg.bpp) / 8;
1282
1283 ret = lcd_init(par, &par->cfg, &par->mode);
1284 if (ret < 0) {
1285 dev_err(par->dev, "lcd init failed\n");
1286 return ret;
1287 }
1288
1289 par->dma_start = info->fix.smem_start +
1290 info->var.yoffset * info->fix.line_length +
1291 info->var.xoffset * info->var.bits_per_pixel / 8;
1292 par->dma_end = par->dma_start +
1293 info->var.yres * info->fix.line_length - 1;
1294
1295 lcdc_write(par->dma_start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
1296 lcdc_write(par->dma_end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
1297 lcdc_write(par->dma_start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
1298 lcdc_write(par->dma_end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
1299
1300 if (raster)
1301 lcd_enable_raster();
1302
1303 return 0;
1304 }
1305
1306 static struct fb_ops da8xx_fb_ops = {
1307 .owner = THIS_MODULE,
1308 .fb_check_var = fb_check_var,
1309 .fb_set_par = da8xxfb_set_par,
1310 .fb_setcolreg = fb_setcolreg,
1311 .fb_pan_display = da8xx_pan_display,
1312 .fb_ioctl = fb_ioctl,
1313 .fb_fillrect = cfb_fillrect,
1314 .fb_copyarea = cfb_copyarea,
1315 .fb_imageblit = cfb_imageblit,
1316 .fb_blank = cfb_blank,
1317 };
1318
1319 static struct fb_videomode *da8xx_fb_get_videomode(struct platform_device *dev)
1320 {
1321 struct da8xx_lcdc_platform_data *fb_pdata = dev_get_platdata(&dev->dev);
1322 struct fb_videomode *lcdc_info;
1323 int i;
1324
1325 for (i = 0, lcdc_info = known_lcd_panels;
1326 i < ARRAY_SIZE(known_lcd_panels); i++, lcdc_info++) {
1327 if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
1328 break;
1329 }
1330
1331 if (i == ARRAY_SIZE(known_lcd_panels)) {
1332 dev_err(&dev->dev, "no panel found\n");
1333 return NULL;
1334 }
1335 dev_info(&dev->dev, "found %s panel\n", lcdc_info->name);
1336
1337 return lcdc_info;
1338 }
1339
1340 static int fb_probe(struct platform_device *device)
1341 {
1342 struct da8xx_lcdc_platform_data *fb_pdata =
1343 dev_get_platdata(&device->dev);
1344 struct resource *lcdc_regs;
1345 struct lcd_ctrl_config *lcd_cfg;
1346 struct fb_videomode *lcdc_info;
1347 struct fb_info *da8xx_fb_info;
1348 struct da8xx_fb_par *par;
1349 struct clk *tmp_lcdc_clk;
1350 int ret;
1351 unsigned long ulcm;
1352
1353 if (fb_pdata == NULL) {
1354 dev_err(&device->dev, "Can not get platform data\n");
1355 return -ENOENT;
1356 }
1357
1358 lcdc_info = da8xx_fb_get_videomode(device);
1359 if (lcdc_info == NULL)
1360 return -ENODEV;
1361
1362 lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0);
1363 da8xx_fb_reg_base = devm_ioremap_resource(&device->dev, lcdc_regs);
1364 if (IS_ERR(da8xx_fb_reg_base))
1365 return PTR_ERR(da8xx_fb_reg_base);
1366
1367 tmp_lcdc_clk = devm_clk_get(&device->dev, "fck");
1368 if (IS_ERR(tmp_lcdc_clk)) {
1369 dev_err(&device->dev, "Can not get device clock\n");
1370 return PTR_ERR(tmp_lcdc_clk);
1371 }
1372
1373 pm_runtime_enable(&device->dev);
1374 pm_runtime_get_sync(&device->dev);
1375
1376 /* Determine LCD IP Version */
1377 switch (lcdc_read(LCD_PID_REG)) {
1378 case 0x4C100102:
1379 lcd_revision = LCD_VERSION_1;
1380 break;
1381 case 0x4F200800:
1382 case 0x4F201000:
1383 lcd_revision = LCD_VERSION_2;
1384 break;
1385 default:
1386 dev_warn(&device->dev, "Unknown PID Reg value 0x%x, "
1387 "defaulting to LCD revision 1\n",
1388 lcdc_read(LCD_PID_REG));
1389 lcd_revision = LCD_VERSION_1;
1390 break;
1391 }
1392
1393 lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
1394
1395 if (!lcd_cfg) {
1396 ret = -EINVAL;
1397 goto err_pm_runtime_disable;
1398 }
1399
1400 da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par),
1401 &device->dev);
1402 if (!da8xx_fb_info) {
1403 dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
1404 ret = -ENOMEM;
1405 goto err_pm_runtime_disable;
1406 }
1407
1408 par = da8xx_fb_info->par;
1409 par->dev = &device->dev;
1410 par->lcdc_clk = tmp_lcdc_clk;
1411 par->lcdc_clk_rate = clk_get_rate(par->lcdc_clk);
1412 if (fb_pdata->panel_power_ctrl) {
1413 par->panel_power_ctrl = fb_pdata->panel_power_ctrl;
1414 par->panel_power_ctrl(1);
1415 }
1416
1417 fb_videomode_to_var(&da8xx_fb_var, lcdc_info);
1418 par->cfg = *lcd_cfg;
1419
1420 da8xx_fb_lcd_reset();
1421
1422 /* allocate frame buffer */
1423 par->vram_size = lcdc_info->xres * lcdc_info->yres * lcd_cfg->bpp;
1424 ulcm = lcm((lcdc_info->xres * lcd_cfg->bpp)/8, PAGE_SIZE);
1425 par->vram_size = roundup(par->vram_size/8, ulcm);
1426 par->vram_size = par->vram_size * LCD_NUM_BUFFERS;
1427
1428 par->vram_virt = dma_alloc_coherent(NULL,
1429 par->vram_size,
1430 &par->vram_phys,
1431 GFP_KERNEL | GFP_DMA);
1432 if (!par->vram_virt) {
1433 dev_err(&device->dev,
1434 "GLCD: kmalloc for frame buffer failed\n");
1435 ret = -EINVAL;
1436 goto err_release_fb;
1437 }
1438
1439 da8xx_fb_info->screen_base = (char __iomem *) par->vram_virt;
1440 da8xx_fb_fix.smem_start = par->vram_phys;
1441 da8xx_fb_fix.smem_len = par->vram_size;
1442 da8xx_fb_fix.line_length = (lcdc_info->xres * lcd_cfg->bpp) / 8;
1443
1444 par->dma_start = par->vram_phys;
1445 par->dma_end = par->dma_start + lcdc_info->yres *
1446 da8xx_fb_fix.line_length - 1;
1447
1448 /* allocate palette buffer */
1449 par->v_palette_base = dma_zalloc_coherent(NULL, PALETTE_SIZE,
1450 &par->p_palette_base,
1451 GFP_KERNEL | GFP_DMA);
1452 if (!par->v_palette_base) {
1453 dev_err(&device->dev,
1454 "GLCD: kmalloc for palette buffer failed\n");
1455 ret = -EINVAL;
1456 goto err_release_fb_mem;
1457 }
1458
1459 par->irq = platform_get_irq(device, 0);
1460 if (par->irq < 0) {
1461 ret = -ENOENT;
1462 goto err_release_pl_mem;
1463 }
1464
1465 da8xx_fb_var.grayscale =
1466 lcd_cfg->panel_shade == MONOCHROME ? 1 : 0;
1467 da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp;
1468
1469 /* Initialize fbinfo */
1470 da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
1471 da8xx_fb_info->fix = da8xx_fb_fix;
1472 da8xx_fb_info->var = da8xx_fb_var;
1473 da8xx_fb_info->fbops = &da8xx_fb_ops;
1474 da8xx_fb_info->pseudo_palette = par->pseudo_palette;
1475 da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
1476 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1477
1478 ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0);
1479 if (ret)
1480 goto err_release_pl_mem;
1481 da8xx_fb_info->cmap.len = par->palette_sz;
1482
1483 /* initialize var_screeninfo */
1484 da8xx_fb_var.activate = FB_ACTIVATE_FORCE;
1485 fb_set_var(da8xx_fb_info, &da8xx_fb_var);
1486
1487 dev_set_drvdata(&device->dev, da8xx_fb_info);
1488
1489 /* initialize the vsync wait queue */
1490 init_waitqueue_head(&par->vsync_wait);
1491 par->vsync_timeout = HZ / 5;
1492 par->which_dma_channel_done = -1;
1493 spin_lock_init(&par->lock_for_chan_update);
1494
1495 /* Register the Frame Buffer */
1496 if (register_framebuffer(da8xx_fb_info) < 0) {
1497 dev_err(&device->dev,
1498 "GLCD: Frame Buffer Registration Failed!\n");
1499 ret = -EINVAL;
1500 goto err_dealloc_cmap;
1501 }
1502
1503 #ifdef CONFIG_CPU_FREQ
1504 ret = lcd_da8xx_cpufreq_register(par);
1505 if (ret) {
1506 dev_err(&device->dev, "failed to register cpufreq\n");
1507 goto err_cpu_freq;
1508 }
1509 #endif
1510
1511 if (lcd_revision == LCD_VERSION_1)
1512 lcdc_irq_handler = lcdc_irq_handler_rev01;
1513 else {
1514 init_waitqueue_head(&frame_done_wq);
1515 lcdc_irq_handler = lcdc_irq_handler_rev02;
1516 }
1517
1518 ret = devm_request_irq(&device->dev, par->irq, lcdc_irq_handler, 0,
1519 DRIVER_NAME, par);
1520 if (ret)
1521 goto irq_freq;
1522 return 0;
1523
1524 irq_freq:
1525 #ifdef CONFIG_CPU_FREQ
1526 lcd_da8xx_cpufreq_deregister(par);
1527 err_cpu_freq:
1528 #endif
1529 unregister_framebuffer(da8xx_fb_info);
1530
1531 err_dealloc_cmap:
1532 fb_dealloc_cmap(&da8xx_fb_info->cmap);
1533
1534 err_release_pl_mem:
1535 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
1536 par->p_palette_base);
1537
1538 err_release_fb_mem:
1539 dma_free_coherent(NULL, par->vram_size, par->vram_virt, par->vram_phys);
1540
1541 err_release_fb:
1542 framebuffer_release(da8xx_fb_info);
1543
1544 err_pm_runtime_disable:
1545 pm_runtime_put_sync(&device->dev);
1546 pm_runtime_disable(&device->dev);
1547
1548 return ret;
1549 }
1550
1551 #ifdef CONFIG_PM_SLEEP
1552 static struct lcdc_context {
1553 u32 clk_enable;
1554 u32 ctrl;
1555 u32 dma_ctrl;
1556 u32 raster_timing_0;
1557 u32 raster_timing_1;
1558 u32 raster_timing_2;
1559 u32 int_enable_set;
1560 u32 dma_frm_buf_base_addr_0;
1561 u32 dma_frm_buf_ceiling_addr_0;
1562 u32 dma_frm_buf_base_addr_1;
1563 u32 dma_frm_buf_ceiling_addr_1;
1564 u32 raster_ctrl;
1565 } reg_context;
1566
1567 static void lcd_context_save(void)
1568 {
1569 if (lcd_revision == LCD_VERSION_2) {
1570 reg_context.clk_enable = lcdc_read(LCD_CLK_ENABLE_REG);
1571 reg_context.int_enable_set = lcdc_read(LCD_INT_ENABLE_SET_REG);
1572 }
1573
1574 reg_context.ctrl = lcdc_read(LCD_CTRL_REG);
1575 reg_context.dma_ctrl = lcdc_read(LCD_DMA_CTRL_REG);
1576 reg_context.raster_timing_0 = lcdc_read(LCD_RASTER_TIMING_0_REG);
1577 reg_context.raster_timing_1 = lcdc_read(LCD_RASTER_TIMING_1_REG);
1578 reg_context.raster_timing_2 = lcdc_read(LCD_RASTER_TIMING_2_REG);
1579 reg_context.dma_frm_buf_base_addr_0 =
1580 lcdc_read(LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
1581 reg_context.dma_frm_buf_ceiling_addr_0 =
1582 lcdc_read(LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
1583 reg_context.dma_frm_buf_base_addr_1 =
1584 lcdc_read(LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
1585 reg_context.dma_frm_buf_ceiling_addr_1 =
1586 lcdc_read(LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
1587 reg_context.raster_ctrl = lcdc_read(LCD_RASTER_CTRL_REG);
1588 return;
1589 }
1590
1591 static void lcd_context_restore(void)
1592 {
1593 if (lcd_revision == LCD_VERSION_2) {
1594 lcdc_write(reg_context.clk_enable, LCD_CLK_ENABLE_REG);
1595 lcdc_write(reg_context.int_enable_set, LCD_INT_ENABLE_SET_REG);
1596 }
1597
1598 lcdc_write(reg_context.ctrl, LCD_CTRL_REG);
1599 lcdc_write(reg_context.dma_ctrl, LCD_DMA_CTRL_REG);
1600 lcdc_write(reg_context.raster_timing_0, LCD_RASTER_TIMING_0_REG);
1601 lcdc_write(reg_context.raster_timing_1, LCD_RASTER_TIMING_1_REG);
1602 lcdc_write(reg_context.raster_timing_2, LCD_RASTER_TIMING_2_REG);
1603 lcdc_write(reg_context.dma_frm_buf_base_addr_0,
1604 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
1605 lcdc_write(reg_context.dma_frm_buf_ceiling_addr_0,
1606 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
1607 lcdc_write(reg_context.dma_frm_buf_base_addr_1,
1608 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
1609 lcdc_write(reg_context.dma_frm_buf_ceiling_addr_1,
1610 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
1611 lcdc_write(reg_context.raster_ctrl, LCD_RASTER_CTRL_REG);
1612 return;
1613 }
1614
1615 static int fb_suspend(struct device *dev)
1616 {
1617 struct fb_info *info = dev_get_drvdata(dev);
1618 struct da8xx_fb_par *par = info->par;
1619
1620 console_lock();
1621 if (par->panel_power_ctrl)
1622 par->panel_power_ctrl(0);
1623
1624 fb_set_suspend(info, 1);
1625 lcd_disable_raster(DA8XX_FRAME_WAIT);
1626 lcd_context_save();
1627 pm_runtime_put_sync(dev);
1628 console_unlock();
1629
1630 return 0;
1631 }
1632 static int fb_resume(struct device *dev)
1633 {
1634 struct fb_info *info = dev_get_drvdata(dev);
1635 struct da8xx_fb_par *par = info->par;
1636
1637 console_lock();
1638 pm_runtime_get_sync(dev);
1639 lcd_context_restore();
1640 if (par->blank == FB_BLANK_UNBLANK) {
1641 lcd_enable_raster();
1642
1643 if (par->panel_power_ctrl)
1644 par->panel_power_ctrl(1);
1645 }
1646
1647 fb_set_suspend(info, 0);
1648 console_unlock();
1649
1650 return 0;
1651 }
1652 #endif
1653
1654 static SIMPLE_DEV_PM_OPS(fb_pm_ops, fb_suspend, fb_resume);
1655
1656 static struct platform_driver da8xx_fb_driver = {
1657 .probe = fb_probe,
1658 .remove = fb_remove,
1659 .driver = {
1660 .name = DRIVER_NAME,
1661 .pm = &fb_pm_ops,
1662 },
1663 };
1664 module_platform_driver(da8xx_fb_driver);
1665
1666 MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx");
1667 MODULE_AUTHOR("Texas Instruments");
1668 MODULE_LICENSE("GPL");
Linux with added FPC-III support