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/suspend.h>
31 #include <linux/interrupt.h>
32 #include <linux/wait.h>
33 #include <linux/clk.h>
34 #include <linux/cpufreq.h>
35 #include <linux/console.h>
36 #include <linux/spinlock.h>
37 #include <linux/slab.h>
38 #include <linux/delay.h>
39 #include <linux/lcm.h>
40 #include <video/da8xx-fb.h>
41 #include <asm/div64.h>
43 #define DRIVER_NAME "da8xx_lcdc"
45 #define LCD_VERSION_1 1
46 #define LCD_VERSION_2 2
48 /* LCD Status Register */
49 #define LCD_END_OF_FRAME1 BIT(9)
50 #define LCD_END_OF_FRAME0 BIT(8)
51 #define LCD_PL_LOAD_DONE BIT(6)
52 #define LCD_FIFO_UNDERFLOW BIT(5)
53 #define LCD_SYNC_LOST BIT(2)
54 #define LCD_FRAME_DONE BIT(0)
56 /* LCD DMA Control Register */
57 #define LCD_DMA_BURST_SIZE(x) ((x) << 4)
58 #define LCD_DMA_BURST_1 0x0
59 #define LCD_DMA_BURST_2 0x1
60 #define LCD_DMA_BURST_4 0x2
61 #define LCD_DMA_BURST_8 0x3
62 #define LCD_DMA_BURST_16 0x4
63 #define LCD_V1_END_OF_FRAME_INT_ENA BIT(2)
64 #define LCD_V2_END_OF_FRAME0_INT_ENA BIT(8)
65 #define LCD_V2_END_OF_FRAME1_INT_ENA BIT(9)
66 #define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0)
68 /* LCD Control Register */
69 #define LCD_CLK_DIVISOR(x) ((x) << 8)
70 #define LCD_RASTER_MODE 0x01
72 /* LCD Raster Control Register */
73 #define LCD_PALETTE_LOAD_MODE(x) ((x) << 20)
74 #define PALETTE_AND_DATA 0x00
75 #define PALETTE_ONLY 0x01
76 #define DATA_ONLY 0x02
78 #define LCD_MONO_8BIT_MODE BIT(9)
79 #define LCD_RASTER_ORDER BIT(8)
80 #define LCD_TFT_MODE BIT(7)
81 #define LCD_V1_UNDERFLOW_INT_ENA BIT(6)
82 #define LCD_V2_UNDERFLOW_INT_ENA BIT(5)
83 #define LCD_V1_PL_INT_ENA BIT(4)
84 #define LCD_V2_PL_INT_ENA BIT(6)
85 #define LCD_MONOCHROME_MODE BIT(1)
86 #define LCD_RASTER_ENABLE BIT(0)
87 #define LCD_TFT_ALT_ENABLE BIT(23)
88 #define LCD_STN_565_ENABLE BIT(24)
89 #define LCD_V2_DMA_CLK_EN BIT(2)
90 #define LCD_V2_LIDD_CLK_EN BIT(1)
91 #define LCD_V2_CORE_CLK_EN BIT(0)
92 #define LCD_V2_LPP_B10 26
93 #define LCD_V2_TFT_24BPP_MODE BIT(25)
94 #define LCD_V2_TFT_24BPP_UNPACK BIT(26)
96 /* LCD Raster Timing 2 Register */
97 #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
98 #define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8)
99 #define LCD_SYNC_CTRL BIT(25)
100 #define LCD_SYNC_EDGE BIT(24)
101 #define LCD_INVERT_PIXEL_CLOCK BIT(22)
102 #define LCD_INVERT_LINE_CLOCK BIT(21)
103 #define LCD_INVERT_FRAME_CLOCK BIT(20)
105 /* LCD Block */
106 #define LCD_PID_REG 0x0
107 #define LCD_CTRL_REG 0x4
108 #define LCD_STAT_REG 0x8
109 #define LCD_RASTER_CTRL_REG 0x28
110 #define LCD_RASTER_TIMING_0_REG 0x2C
111 #define LCD_RASTER_TIMING_1_REG 0x30
112 #define LCD_RASTER_TIMING_2_REG 0x34
113 #define LCD_DMA_CTRL_REG 0x40
114 #define LCD_DMA_FRM_BUF_BASE_ADDR_0_REG 0x44
115 #define LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG 0x48
116 #define LCD_DMA_FRM_BUF_BASE_ADDR_1_REG 0x4C
117 #define LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG 0x50
119 /* Interrupt Registers available only in Version 2 */
120 #define LCD_RAW_STAT_REG 0x58
121 #define LCD_MASKED_STAT_REG 0x5c
122 #define LCD_INT_ENABLE_SET_REG 0x60
123 #define LCD_INT_ENABLE_CLR_REG 0x64
124 #define LCD_END_OF_INT_IND_REG 0x68
126 /* Clock registers available only on Version 2 */
127 #define LCD_CLK_ENABLE_REG 0x6c
128 #define LCD_CLK_RESET_REG 0x70
129 #define LCD_CLK_MAIN_RESET BIT(3)
131 #define LCD_NUM_BUFFERS 2
133 #define PALETTE_SIZE 256
135 #define CLK_MIN_DIV 2
136 #define CLK_MAX_DIV 255
138 static void __iomem *da8xx_fb_reg_base;
139 static unsigned int lcd_revision;
140 static irq_handler_t lcdc_irq_handler;
141 static wait_queue_head_t frame_done_wq;
142 static int frame_done_flag;
144 static unsigned int lcdc_read(unsigned int addr)
145 {
146 return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr));
147 }
149 static void lcdc_write(unsigned int val, unsigned int addr)
150 {
151 __raw_writel(val, da8xx_fb_reg_base + (addr));
152 }
154 struct da8xx_fb_par {
155 struct device *dev;
156 resource_size_t p_palette_base;
157 unsigned char *v_palette_base;
158 dma_addr_t vram_phys;
159 unsigned long vram_size;
160 void *vram_virt;
161 unsigned int dma_start;
162 unsigned int dma_end;
163 struct clk *lcdc_clk;
164 int irq;
165 unsigned int palette_sz;
166 int blank;
167 wait_queue_head_t vsync_wait;
168 int vsync_flag;
169 int vsync_timeout;
170 spinlock_t lock_for_chan_update;
172 /*
173 * LCDC has 2 ping pong DMA channels, channel 0
174 * and channel 1.
175 */
176 unsigned int which_dma_channel_done;
177 #ifdef CONFIG_CPU_FREQ
178 struct notifier_block freq_transition;
179 #endif
180 unsigned int lcdc_clk_rate;
181 void (*panel_power_ctrl)(int);
182 u32 pseudo_palette[16];
183 struct fb_videomode mode;
184 struct lcd_ctrl_config cfg;
185 };
187 static struct fb_var_screeninfo da8xx_fb_var;
189 static struct fb_fix_screeninfo da8xx_fb_fix = {
190 .id = "DA8xx FB Drv",
191 .type = FB_TYPE_PACKED_PIXELS,
192 .type_aux = 0,
193 .visual = FB_VISUAL_PSEUDOCOLOR,
194 .xpanstep = 0,
195 .ypanstep = 1,
196 .ywrapstep = 0,
197 .accel = FB_ACCEL_NONE
198 };
200 static struct fb_videomode known_lcd_panels[] = {
201 /* Sharp LCD035Q3DG01 */
202 [0] = {
203 .name = "Sharp_LCD035Q3DG01",
204 .xres = 320,
205 .yres = 240,
206 .pixclock = KHZ2PICOS(4607),
207 .left_margin = 6,
208 .right_margin = 8,
209 .upper_margin = 2,
210 .lower_margin = 2,
211 .hsync_len = 0,
212 .vsync_len = 0,
213 .sync = FB_SYNC_CLK_INVERT |
214 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
215 },
216 /* Sharp LK043T1DG01 */
217 [1] = {
218 .name = "Sharp_LK043T1DG01",
219 .xres = 480,
220 .yres = 272,
221 .pixclock = KHZ2PICOS(7833),
222 .left_margin = 2,
223 .right_margin = 2,
224 .upper_margin = 2,
225 .lower_margin = 2,
226 .hsync_len = 41,
227 .vsync_len = 10,
228 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
229 .flag = 0,
230 },
231 [2] = {
232 /* Hitachi SP10Q010 */
233 .name = "SP10Q010",
234 .xres = 320,
235 .yres = 240,
236 .pixclock = KHZ2PICOS(7833),
237 .left_margin = 10,
238 .right_margin = 10,
239 .upper_margin = 10,
240 .lower_margin = 10,
241 .hsync_len = 10,
242 .vsync_len = 10,
243 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
244 .flag = 0,
245 },
246 };
248 static bool da8xx_fb_is_raster_enabled(void)
249 {
250 return !!(lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE);
251 }
253 /* Enable the Raster Engine of the LCD Controller */
254 static void lcd_enable_raster(void)
255 {
256 u32 reg;
258 /* Put LCDC in reset for several cycles */
259 if (lcd_revision == LCD_VERSION_2)
260 /* Write 1 to reset LCDC */
261 lcdc_write(LCD_CLK_MAIN_RESET, LCD_CLK_RESET_REG);
262 mdelay(1);
264 /* Bring LCDC out of reset */
265 if (lcd_revision == LCD_VERSION_2)
266 lcdc_write(0, LCD_CLK_RESET_REG);
267 mdelay(1);
269 /* Above reset sequence doesnot reset register context */
270 reg = lcdc_read(LCD_RASTER_CTRL_REG);
271 if (!(reg & LCD_RASTER_ENABLE))
272 lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
273 }
275 /* Disable the Raster Engine of the LCD Controller */
276 static void lcd_disable_raster(enum da8xx_frame_complete wait_for_frame_done)
277 {
278 u32 reg;
279 int ret;
281 reg = lcdc_read(LCD_RASTER_CTRL_REG);
282 if (reg & LCD_RASTER_ENABLE)
283 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
284 else
285 /* return if already disabled */
286 return;
288 if ((wait_for_frame_done == DA8XX_FRAME_WAIT) &&
289 (lcd_revision == LCD_VERSION_2)) {
290 frame_done_flag = 0;
291 ret = wait_event_interruptible_timeout(frame_done_wq,
292 frame_done_flag != 0,
293 msecs_to_jiffies(50));
294 if (ret == 0)
295 pr_err("LCD Controller timed out\n");
296 }
297 }
299 static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
300 {
301 u32 start;
302 u32 end;
303 u32 reg_ras;
304 u32 reg_dma;
305 u32 reg_int;
307 /* init reg to clear PLM (loading mode) fields */
308 reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
309 reg_ras &= ~(3 << 20);
311 reg_dma = lcdc_read(LCD_DMA_CTRL_REG);
313 if (load_mode == LOAD_DATA) {
314 start = par->dma_start;
315 end = par->dma_end;
317 reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY);
318 if (lcd_revision == LCD_VERSION_1) {
319 reg_dma |= LCD_V1_END_OF_FRAME_INT_ENA;
320 } else {
321 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
322 LCD_V2_END_OF_FRAME0_INT_ENA |
323 LCD_V2_END_OF_FRAME1_INT_ENA |
324 LCD_FRAME_DONE | LCD_SYNC_LOST;
325 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
326 }
327 reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
329 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
330 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
331 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
332 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
333 } else if (load_mode == LOAD_PALETTE) {
334 start = par->p_palette_base;
335 end = start + par->palette_sz - 1;
337 reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
339 if (lcd_revision == LCD_VERSION_1) {
340 reg_ras |= LCD_V1_PL_INT_ENA;
341 } else {
342 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
343 LCD_V2_PL_INT_ENA;
344 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
345 }
347 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
348 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
349 }
351 lcdc_write(reg_dma, LCD_DMA_CTRL_REG);
352 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
354 /*
355 * The Raster enable bit must be set after all other control fields are
356 * set.
357 */
358 lcd_enable_raster();
359 }
361 /* Configure the Burst Size and fifo threhold of DMA */
362 static int lcd_cfg_dma(int burst_size, int fifo_th)
363 {
364 u32 reg;
366 reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001;
367 switch (burst_size) {
368 case 1:
369 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
370 break;
371 case 2:
372 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
373 break;
374 case 4:
375 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
376 break;
377 case 8:
378 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
379 break;
380 case 16:
381 default:
382 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
383 break;
384 }
386 reg |= (fifo_th << 8);
388 lcdc_write(reg, LCD_DMA_CTRL_REG);
390 return 0;
391 }
393 static void lcd_cfg_ac_bias(int period, int transitions_per_int)
394 {
395 u32 reg;
397 /* Set the AC Bias Period and Number of Transisitons per Interrupt */
398 reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000;
399 reg |= LCD_AC_BIAS_FREQUENCY(period) |
400 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
401 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
402 }
404 static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
405 int front_porch)
406 {
407 u32 reg;
409 reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf;
410 reg |= (((back_porch-1) & 0xff) << 24)
411 | (((front_porch-1) & 0xff) << 16)
412 | (((pulse_width-1) & 0x3f) << 10);
413 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
415 /*
416 * LCDC Version 2 adds some extra bits that increase the allowable
417 * size of the horizontal timing registers.
418 * remember that the registers use 0 to represent 1 so all values
419 * that get set into register need to be decremented by 1
420 */
421 if (lcd_revision == LCD_VERSION_2) {
422 /* Mask off the bits we want to change */
423 reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & ~0x780000ff;
424 reg |= ((front_porch-1) & 0x300) >> 8;
425 reg |= ((back_porch-1) & 0x300) >> 4;
426 reg |= ((pulse_width-1) & 0x3c0) << 21;
427 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
428 }
429 }
431 static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
432 int front_porch)
433 {
434 u32 reg;
436 reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
437 reg |= ((back_porch & 0xff) << 24)
438 | ((front_porch & 0xff) << 16)
439 | (((pulse_width-1) & 0x3f) << 10);
440 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
441 }
443 static int lcd_cfg_display(const struct lcd_ctrl_config *cfg,
444 struct fb_videomode *panel)
445 {
446 u32 reg;
447 u32 reg_int;
449 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE |
450 LCD_MONO_8BIT_MODE |
451 LCD_MONOCHROME_MODE);
453 switch (cfg->panel_shade) {
454 case MONOCHROME:
455 reg |= LCD_MONOCHROME_MODE;
456 if (cfg->mono_8bit_mode)
457 reg |= LCD_MONO_8BIT_MODE;
458 break;
459 case COLOR_ACTIVE:
460 reg |= LCD_TFT_MODE;
461 if (cfg->tft_alt_mode)
462 reg |= LCD_TFT_ALT_ENABLE;
463 break;
465 case COLOR_PASSIVE:
466 /* AC bias applicable only for Pasive panels */
467 lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
468 if (cfg->bpp == 12 && cfg->stn_565_mode)
469 reg |= LCD_STN_565_ENABLE;
470 break;
472 default:
473 return -EINVAL;
474 }
476 /* enable additional interrupts here */
477 if (lcd_revision == LCD_VERSION_1) {
478 reg |= LCD_V1_UNDERFLOW_INT_ENA;
479 } else {
480 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
481 LCD_V2_UNDERFLOW_INT_ENA;
482 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
483 }
485 lcdc_write(reg, LCD_RASTER_CTRL_REG);
487 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
489 reg |= LCD_SYNC_CTRL;
491 if (cfg->sync_edge)
492 reg |= LCD_SYNC_EDGE;
493 else
494 reg &= ~LCD_SYNC_EDGE;
496 if ((panel->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
497 reg |= LCD_INVERT_LINE_CLOCK;
498 else
499 reg &= ~LCD_INVERT_LINE_CLOCK;
501 if ((panel->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
502 reg |= LCD_INVERT_FRAME_CLOCK;
503 else
504 reg &= ~LCD_INVERT_FRAME_CLOCK;
506 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
508 return 0;
509 }
511 static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
512 u32 bpp, u32 raster_order)
513 {
514 u32 reg;
516 if (bpp > 16 && lcd_revision == LCD_VERSION_1)
517 return -EINVAL;
519 /* Set the Panel Width */
520 /* Pixels per line = (PPL + 1)*16 */
521 if (lcd_revision == LCD_VERSION_1) {
522 /*
523 * 0x3F in bits 4..9 gives max horizontal resolution = 1024
524 * pixels.
525 */
526 width &= 0x3f0;
527 } else {
528 /*
529 * 0x7F in bits 4..10 gives max horizontal resolution = 2048
530 * pixels.
531 */
532 width &= 0x7f0;
533 }
535 reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
536 reg &= 0xfffffc00;
537 if (lcd_revision == LCD_VERSION_1) {
538 reg |= ((width >> 4) - 1) << 4;
539 } else {
540 width = (width >> 4) - 1;
541 reg |= ((width & 0x3f) << 4) | ((width & 0x40) >> 3);
542 }
543 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
545 /* Set the Panel Height */
546 /* Set bits 9:0 of Lines Per Pixel */
547 reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
548 reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
549 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
551 /* Set bit 10 of Lines Per Pixel */
552 if (lcd_revision == LCD_VERSION_2) {
553 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
554 reg |= ((height - 1) & 0x400) << 16;
555 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
556 }
558 /* Set the Raster Order of the Frame Buffer */
559 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
560 if (raster_order)
561 reg |= LCD_RASTER_ORDER;
563 par->palette_sz = 16 * 2;
565 switch (bpp) {
566 case 1:
567 case 2:
568 case 4:
569 case 16:
570 break;
571 case 24:
572 reg |= LCD_V2_TFT_24BPP_MODE;
573 break;
574 case 32:
575 reg |= LCD_V2_TFT_24BPP_MODE;
576 reg |= LCD_V2_TFT_24BPP_UNPACK;
577 break;
578 case 8:
579 par->palette_sz = 256 * 2;
580 break;
582 default:
583 return -EINVAL;
584 }
586 lcdc_write(reg, LCD_RASTER_CTRL_REG);
588 return 0;
589 }
591 #define CNVT_TOHW(val, width) ((((val) << (width)) + 0x7FFF - (val)) >> 16)
592 static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
593 unsigned blue, unsigned transp,
594 struct fb_info *info)
595 {
596 struct da8xx_fb_par *par = info->par;
597 unsigned short *palette = (unsigned short *) par->v_palette_base;
598 u_short pal;
599 int update_hw = 0;
601 if (regno > 255)
602 return 1;
604 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
605 return 1;
607 if (info->var.bits_per_pixel > 16 && lcd_revision == LCD_VERSION_1)
608 return -EINVAL;
610 switch (info->fix.visual) {
611 case FB_VISUAL_TRUECOLOR:
612 red = CNVT_TOHW(red, info->var.red.length);
613 green = CNVT_TOHW(green, info->var.green.length);
614 blue = CNVT_TOHW(blue, info->var.blue.length);
615 break;
616 case FB_VISUAL_PSEUDOCOLOR:
617 switch (info->var.bits_per_pixel) {
618 case 4:
619 if (regno > 15)
620 return -EINVAL;
622 if (info->var.grayscale) {
623 pal = regno;
624 } else {
625 red >>= 4;
626 green >>= 8;
627 blue >>= 12;
629 pal = red & 0x0f00;
630 pal |= green & 0x00f0;
631 pal |= blue & 0x000f;
632 }
633 if (regno == 0)
634 pal |= 0x2000;
635 palette[regno] = pal;
636 break;
638 case 8:
639 red >>= 4;
640 green >>= 8;
641 blue >>= 12;
643 pal = (red & 0x0f00);
644 pal |= (green & 0x00f0);
645 pal |= (blue & 0x000f);
647 if (palette[regno] != pal) {
648 update_hw = 1;
649 palette[regno] = pal;
650 }
651 break;
652 }
653 break;
654 }
656 /* Truecolor has hardware independent palette */
657 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
658 u32 v;
660 if (regno > 15)
661 return -EINVAL;
663 v = (red << info->var.red.offset) |
664 (green << info->var.green.offset) |
665 (blue << info->var.blue.offset);
667 switch (info->var.bits_per_pixel) {
668 case 16:
669 ((u16 *) (info->pseudo_palette))[regno] = v;
670 break;
671 case 24:
672 case 32:
673 ((u32 *) (info->pseudo_palette))[regno] = v;
674 break;
675 }
676 if (palette[0] != 0x4000) {
677 update_hw = 1;
678 palette[0] = 0x4000;
679 }
680 }
682 /* Update the palette in the h/w as needed. */
683 if (update_hw)
684 lcd_blit(LOAD_PALETTE, par);
686 return 0;
687 }
688 #undef CNVT_TOHW
690 static void da8xx_fb_lcd_reset(void)
691 {
692 /* DMA has to be disabled */
693 lcdc_write(0, LCD_DMA_CTRL_REG);
694 lcdc_write(0, LCD_RASTER_CTRL_REG);
696 if (lcd_revision == LCD_VERSION_2) {
697 lcdc_write(0, LCD_INT_ENABLE_SET_REG);
698 /* Write 1 to reset */
699 lcdc_write(LCD_CLK_MAIN_RESET, LCD_CLK_RESET_REG);
700 lcdc_write(0, LCD_CLK_RESET_REG);
701 }
702 }
704 static int da8xx_fb_config_clk_divider(struct da8xx_fb_par *par,
705 unsigned lcdc_clk_div,
706 unsigned lcdc_clk_rate)
707 {
708 int ret;
710 if (par->lcdc_clk_rate != lcdc_clk_rate) {
711 ret = clk_set_rate(par->lcdc_clk, lcdc_clk_rate);
712 if (IS_ERR_VALUE(ret)) {
713 dev_err(par->dev,
714 "unable to set clock rate at %u\n",
715 lcdc_clk_rate);
716 return ret;
717 }
718 par->lcdc_clk_rate = clk_get_rate(par->lcdc_clk);
719 }
721 /* Configure the LCD clock divisor. */
722 lcdc_write(LCD_CLK_DIVISOR(lcdc_clk_div) |
723 (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
725 if (lcd_revision == LCD_VERSION_2)
726 lcdc_write(LCD_V2_DMA_CLK_EN | LCD_V2_LIDD_CLK_EN |
727 LCD_V2_CORE_CLK_EN, LCD_CLK_ENABLE_REG);
729 return 0;
730 }
732 static unsigned int da8xx_fb_calc_clk_divider(struct da8xx_fb_par *par,
733 unsigned pixclock,
734 unsigned *lcdc_clk_rate)
735 {
736 unsigned lcdc_clk_div;
738 pixclock = PICOS2KHZ(pixclock) * 1000;
740 *lcdc_clk_rate = par->lcdc_clk_rate;
742 if (pixclock < (*lcdc_clk_rate / CLK_MAX_DIV)) {
743 *lcdc_clk_rate = clk_round_rate(par->lcdc_clk,
744 pixclock * CLK_MAX_DIV);
745 lcdc_clk_div = CLK_MAX_DIV;
746 } else if (pixclock > (*lcdc_clk_rate / CLK_MIN_DIV)) {
747 *lcdc_clk_rate = clk_round_rate(par->lcdc_clk,
748 pixclock * CLK_MIN_DIV);
749 lcdc_clk_div = CLK_MIN_DIV;
750 } else {
751 lcdc_clk_div = *lcdc_clk_rate / pixclock;
752 }
754 return lcdc_clk_div;
755 }
757 static int da8xx_fb_calc_config_clk_divider(struct da8xx_fb_par *par,
758 struct fb_videomode *mode)
759 {
760 unsigned lcdc_clk_rate;
761 unsigned lcdc_clk_div = da8xx_fb_calc_clk_divider(par, mode->pixclock,
762 &lcdc_clk_rate);
764 return da8xx_fb_config_clk_divider(par, lcdc_clk_div, lcdc_clk_rate);
765 }
767 static unsigned da8xx_fb_round_clk(struct da8xx_fb_par *par,
768 unsigned pixclock)
769 {
770 unsigned lcdc_clk_div, lcdc_clk_rate;
772 lcdc_clk_div = da8xx_fb_calc_clk_divider(par, pixclock, &lcdc_clk_rate);
773 return KHZ2PICOS(lcdc_clk_rate / (1000 * lcdc_clk_div));
774 }
776 static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
777 struct fb_videomode *panel)
778 {
779 u32 bpp;
780 int ret = 0;
782 ret = da8xx_fb_calc_config_clk_divider(par, panel);
783 if (IS_ERR_VALUE(ret)) {
784 dev_err(par->dev, "unable to configure clock\n");
785 return ret;
786 }
788 if (panel->sync & FB_SYNC_CLK_INVERT)
789 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
790 LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
791 else
792 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
793 ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
795 /* Configure the DMA burst size and fifo threshold. */
796 ret = lcd_cfg_dma(cfg->dma_burst_sz, cfg->fifo_th);
797 if (ret < 0)
798 return ret;
800 /* Configure the vertical and horizontal sync properties. */
801 lcd_cfg_vertical_sync(panel->upper_margin, panel->vsync_len,
802 panel->lower_margin);
803 lcd_cfg_horizontal_sync(panel->left_margin, panel->hsync_len,
804 panel->right_margin);
806 /* Configure for disply */
807 ret = lcd_cfg_display(cfg, panel);
808 if (ret < 0)
809 return ret;
811 bpp = cfg->bpp;
813 if (bpp == 12)
814 bpp = 16;
815 ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->xres,
816 (unsigned int)panel->yres, bpp,
817 cfg->raster_order);
818 if (ret < 0)
819 return ret;
821 /* Configure FDD */
822 lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) |
823 (cfg->fdd << 12), LCD_RASTER_CTRL_REG);
825 return 0;
826 }
828 /* IRQ handler for version 2 of LCDC */
829 static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg)
830 {
831 struct da8xx_fb_par *par = arg;
832 u32 stat = lcdc_read(LCD_MASKED_STAT_REG);
834 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
835 lcd_disable_raster(DA8XX_FRAME_NOWAIT);
836 lcdc_write(stat, LCD_MASKED_STAT_REG);
837 lcd_enable_raster();
838 } else if (stat & LCD_PL_LOAD_DONE) {
839 /*
840 * Must disable raster before changing state of any control bit.
841 * And also must be disabled before clearing the PL loading
842 * interrupt via the following write to the status register. If
843 * this is done after then one gets multiple PL done interrupts.
844 */
845 lcd_disable_raster(DA8XX_FRAME_NOWAIT);
847 lcdc_write(stat, LCD_MASKED_STAT_REG);
849 /* Disable PL completion interrupt */
850 lcdc_write(LCD_V2_PL_INT_ENA, LCD_INT_ENABLE_CLR_REG);
852 /* Setup and start data loading mode */
853 lcd_blit(LOAD_DATA, par);
854 } else {
855 lcdc_write(stat, LCD_MASKED_STAT_REG);
857 if (stat & LCD_END_OF_FRAME0) {
858 par->which_dma_channel_done = 0;
859 lcdc_write(par->dma_start,
860 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
861 lcdc_write(par->dma_end,
862 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
863 par->vsync_flag = 1;
864 wake_up_interruptible(&par->vsync_wait);
865 }
867 if (stat & LCD_END_OF_FRAME1) {
868 par->which_dma_channel_done = 1;
869 lcdc_write(par->dma_start,
870 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
871 lcdc_write(par->dma_end,
872 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
873 par->vsync_flag = 1;
874 wake_up_interruptible(&par->vsync_wait);
875 }
877 /* Set only when controller is disabled and at the end of
878 * active frame
879 */
880 if (stat & BIT(0)) {
881 frame_done_flag = 1;
882 wake_up_interruptible(&frame_done_wq);
883 }
884 }
886 lcdc_write(0, LCD_END_OF_INT_IND_REG);
887 return IRQ_HANDLED;
888 }
890 /* IRQ handler for version 1 LCDC */
891 static irqreturn_t lcdc_irq_handler_rev01(int irq, void *arg)
892 {
893 struct da8xx_fb_par *par = arg;
894 u32 stat = lcdc_read(LCD_STAT_REG);
895 u32 reg_ras;
897 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
898 lcd_disable_raster(DA8XX_FRAME_NOWAIT);
899 lcdc_write(stat, LCD_STAT_REG);
900 lcd_enable_raster();
901 } else if (stat & LCD_PL_LOAD_DONE) {
902 /*
903 * Must disable raster before changing state of any control bit.
904 * And also must be disabled before clearing the PL loading
905 * interrupt via the following write to the status register. If
906 * this is done after then one gets multiple PL done interrupts.
907 */
908 lcd_disable_raster(DA8XX_FRAME_NOWAIT);
910 lcdc_write(stat, LCD_STAT_REG);
912 /* Disable PL completion inerrupt */
913 reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
914 reg_ras &= ~LCD_V1_PL_INT_ENA;
915 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
917 /* Setup and start data loading mode */
918 lcd_blit(LOAD_DATA, par);
919 } else {
920 lcdc_write(stat, LCD_STAT_REG);
922 if (stat & LCD_END_OF_FRAME0) {
923 par->which_dma_channel_done = 0;
924 lcdc_write(par->dma_start,
925 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
926 lcdc_write(par->dma_end,
927 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
928 par->vsync_flag = 1;
929 wake_up_interruptible(&par->vsync_wait);
930 }
932 if (stat & LCD_END_OF_FRAME1) {
933 par->which_dma_channel_done = 1;
934 lcdc_write(par->dma_start,
935 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
936 lcdc_write(par->dma_end,
937 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
938 par->vsync_flag = 1;
939 wake_up_interruptible(&par->vsync_wait);
940 }
941 }
943 return IRQ_HANDLED;
944 }
946 static int fb_check_var(struct fb_var_screeninfo *var,
947 struct fb_info *info)
948 {
949 int err = 0;
950 struct da8xx_fb_par *par = info->par;
951 int bpp = var->bits_per_pixel >> 3;
952 unsigned long line_size = var->xres_virtual * bpp;
954 if (var->bits_per_pixel > 16 && lcd_revision == LCD_VERSION_1)
955 return -EINVAL;
957 switch (var->bits_per_pixel) {
958 case 1:
959 case 8:
960 var->red.offset = 0;
961 var->red.length = 8;
962 var->green.offset = 0;
963 var->green.length = 8;
964 var->blue.offset = 0;
965 var->blue.length = 8;
966 var->transp.offset = 0;
967 var->transp.length = 0;
968 var->nonstd = 0;
969 break;
970 case 4:
971 var->red.offset = 0;
972 var->red.length = 4;
973 var->green.offset = 0;
974 var->green.length = 4;
975 var->blue.offset = 0;
976 var->blue.length = 4;
977 var->transp.offset = 0;
978 var->transp.length = 0;
979 var->nonstd = FB_NONSTD_REV_PIX_IN_B;
980 break;
981 case 16: /* RGB 565 */
982 var->red.offset = 11;
983 var->red.length = 5;
984 var->green.offset = 5;
985 var->green.length = 6;
986 var->blue.offset = 0;
987 var->blue.length = 5;
988 var->transp.offset = 0;
989 var->transp.length = 0;
990 var->nonstd = 0;
991 break;
992 case 24:
993 var->red.offset = 16;
994 var->red.length = 8;
995 var->green.offset = 8;
996 var->green.length = 8;
997 var->blue.offset = 0;
998 var->blue.length = 8;
999 var->nonstd = 0;
1000 break;
1001 case 32:
1002 var->transp.offset = 24;
1003 var->transp.length = 8;
1004 var->red.offset = 16;
1005 var->red.length = 8;
1006 var->green.offset = 8;
1007 var->green.length = 8;
1008 var->blue.offset = 0;
1009 var->blue.length = 8;
1010 var->nonstd = 0;
1011 break;
1012 default:
1013 err = -EINVAL;
1014 }
1016 var->red.msb_right = 0;
1017 var->green.msb_right = 0;
1018 var->blue.msb_right = 0;
1019 var->transp.msb_right = 0;
1021 if (line_size * var->yres_virtual > par->vram_size)
1022 var->yres_virtual = par->vram_size / line_size;
1024 if (var->yres > var->yres_virtual)
1025 var->yres = var->yres_virtual;
1027 if (var->xres > var->xres_virtual)
1028 var->xres = var->xres_virtual;
1030 if (var->xres + var->xoffset > var->xres_virtual)
1031 var->xoffset = var->xres_virtual - var->xres;
1032 if (var->yres + var->yoffset > var->yres_virtual)
1033 var->yoffset = var->yres_virtual - var->yres;
1035 var->pixclock = da8xx_fb_round_clk(par, var->pixclock);
1037 return err;
1038 }
1040 #ifdef CONFIG_CPU_FREQ
1041 static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
1042 unsigned long val, void *data)
1043 {
1044 struct da8xx_fb_par *par;
1046 par = container_of(nb, struct da8xx_fb_par, freq_transition);
1047 if (val == CPUFREQ_POSTCHANGE) {
1048 if (par->lcdc_clk_rate != clk_get_rate(par->lcdc_clk)) {
1049 par->lcdc_clk_rate = clk_get_rate(par->lcdc_clk);
1050 lcd_disable_raster(DA8XX_FRAME_WAIT);
1051 da8xx_fb_calc_config_clk_divider(par, &par->mode);
1052 if (par->blank == FB_BLANK_UNBLANK)
1053 lcd_enable_raster();
1054 }
1055 }
1057 return 0;
1058 }
1060 static int lcd_da8xx_cpufreq_register(struct da8xx_fb_par *par)
1061 {
1062 par->freq_transition.notifier_call = lcd_da8xx_cpufreq_transition;
1064 return cpufreq_register_notifier(&par->freq_transition,
1065 CPUFREQ_TRANSITION_NOTIFIER);
1066 }
1068 static void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par)
1069 {
1070 cpufreq_unregister_notifier(&par->freq_transition,
1071 CPUFREQ_TRANSITION_NOTIFIER);
1072 }
1073 #endif
1075 static int fb_remove(struct platform_device *dev)
1076 {
1077 struct fb_info *info = dev_get_drvdata(&dev->dev);
1079 if (info) {
1080 struct da8xx_fb_par *par = info->par;
1082 #ifdef CONFIG_CPU_FREQ
1083 lcd_da8xx_cpufreq_deregister(par);
1084 #endif
1085 if (par->panel_power_ctrl)
1086 par->panel_power_ctrl(0);
1088 lcd_disable_raster(DA8XX_FRAME_WAIT);
1089 lcdc_write(0, LCD_RASTER_CTRL_REG);
1091 /* disable DMA */
1092 lcdc_write(0, LCD_DMA_CTRL_REG);
1094 unregister_framebuffer(info);
1095 fb_dealloc_cmap(&info->cmap);
1096 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
1097 par->p_palette_base);
1098 dma_free_coherent(NULL, par->vram_size, par->vram_virt,
1099 par->vram_phys);
1100 pm_runtime_put_sync(&dev->dev);
1101 pm_runtime_disable(&dev->dev);
1102 framebuffer_release(info);
1104 }
1105 return 0;
1106 }
1108 /*
1109 * Function to wait for vertical sync which for this LCD peripheral
1110 * translates into waiting for the current raster frame to complete.
1111 */
1112 static int fb_wait_for_vsync(struct fb_info *info)
1113 {
1114 struct da8xx_fb_par *par = info->par;
1115 int ret;
1117 /*
1118 * Set flag to 0 and wait for isr to set to 1. It would seem there is a
1119 * race condition here where the ISR could have occurred just before or
1120 * just after this set. But since we are just coarsely waiting for
1121 * a frame to complete then that's OK. i.e. if the frame completed
1122 * just before this code executed then we have to wait another full
1123 * frame time but there is no way to avoid such a situation. On the
1124 * other hand if the frame completed just after then we don't need
1125 * to wait long at all. Either way we are guaranteed to return to the
1126 * user immediately after a frame completion which is all that is
1127 * required.
1128 */
1129 par->vsync_flag = 0;
1130 ret = wait_event_interruptible_timeout(par->vsync_wait,
1131 par->vsync_flag != 0,
1132 par->vsync_timeout);
1133 if (ret < 0)
1134 return ret;
1135 if (ret == 0)
1136 return -ETIMEDOUT;
1138 return 0;
1139 }
1141 static int fb_ioctl(struct fb_info *info, unsigned int cmd,
1142 unsigned long arg)
1143 {
1144 struct lcd_sync_arg sync_arg;
1146 switch (cmd) {
1147 case FBIOGET_CONTRAST:
1148 case FBIOPUT_CONTRAST:
1149 case FBIGET_BRIGHTNESS:
1150 case FBIPUT_BRIGHTNESS:
1151 case FBIGET_COLOR:
1152 case FBIPUT_COLOR:
1153 return -ENOTTY;
1154 case FBIPUT_HSYNC:
1155 if (copy_from_user(&sync_arg, (char *)arg,
1156 sizeof(struct lcd_sync_arg)))
1157 return -EFAULT;
1158 lcd_cfg_horizontal_sync(sync_arg.back_porch,
1159 sync_arg.pulse_width,
1160 sync_arg.front_porch);
1161 break;
1162 case FBIPUT_VSYNC:
1163 if (copy_from_user(&sync_arg, (char *)arg,
1164 sizeof(struct lcd_sync_arg)))
1165 return -EFAULT;
1166 lcd_cfg_vertical_sync(sync_arg.back_porch,
1167 sync_arg.pulse_width,
1168 sync_arg.front_porch);
1169 break;
1170 case FBIO_WAITFORVSYNC:
1171 return fb_wait_for_vsync(info);
1172 default:
1173 return -EINVAL;
1174 }
1175 return 0;
1176 }
1178 static int cfb_blank(int blank, struct fb_info *info)
1179 {
1180 struct da8xx_fb_par *par = info->par;
1181 int ret = 0;
1183 if (par->blank == blank)
1184 return 0;
1186 par->blank = blank;
1187 switch (blank) {
1188 case FB_BLANK_UNBLANK:
1189 lcd_enable_raster();
1191 if (par->panel_power_ctrl)
1192 par->panel_power_ctrl(1);
1193 break;
1194 case FB_BLANK_NORMAL:
1195 case FB_BLANK_VSYNC_SUSPEND:
1196 case FB_BLANK_HSYNC_SUSPEND:
1197 case FB_BLANK_POWERDOWN:
1198 if (par->panel_power_ctrl)
1199 par->panel_power_ctrl(0);
1201 lcd_disable_raster(DA8XX_FRAME_WAIT);
1202 break;
1203 default:
1204 ret = -EINVAL;
1205 }
1207 return ret;
1208 }
1210 /*
1211 * Set new x,y offsets in the virtual display for the visible area and switch
1212 * to the new mode.
1213 */
1214 static int da8xx_pan_display(struct fb_var_screeninfo *var,
1215 struct fb_info *fbi)
1216 {
1217 int ret = 0;
1218 struct fb_var_screeninfo new_var;
1219 struct da8xx_fb_par *par = fbi->par;
1220 struct fb_fix_screeninfo *fix = &fbi->fix;
1221 unsigned int end;
1222 unsigned int start;
1223 unsigned long irq_flags;
1225 if (var->xoffset != fbi->var.xoffset ||
1226 var->yoffset != fbi->var.yoffset) {
1227 memcpy(&new_var, &fbi->var, sizeof(new_var));
1228 new_var.xoffset = var->xoffset;
1229 new_var.yoffset = var->yoffset;
1230 if (fb_check_var(&new_var, fbi))
1231 ret = -EINVAL;
1232 else {
1233 memcpy(&fbi->var, &new_var, sizeof(new_var));
1235 start = fix->smem_start +
1236 new_var.yoffset * fix->line_length +
1237 new_var.xoffset * fbi->var.bits_per_pixel / 8;
1238 end = start + fbi->var.yres * fix->line_length - 1;
1239 par->dma_start = start;
1240 par->dma_end = end;
1241 spin_lock_irqsave(&par->lock_for_chan_update,
1242 irq_flags);
1243 if (par->which_dma_channel_done == 0) {
1244 lcdc_write(par->dma_start,
1245 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
1246 lcdc_write(par->dma_end,
1247 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
1248 } else if (par->which_dma_channel_done == 1) {
1249 lcdc_write(par->dma_start,
1250 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
1251 lcdc_write(par->dma_end,
1252 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
1253 }
1254 spin_unlock_irqrestore(&par->lock_for_chan_update,
1255 irq_flags);
1256 }
1257 }
1259 return ret;
1260 }
1262 static int da8xxfb_set_par(struct fb_info *info)
1263 {
1264 struct da8xx_fb_par *par = info->par;
1265 int ret;
1266 bool raster = da8xx_fb_is_raster_enabled();
1268 if (raster)
1269 lcd_disable_raster(DA8XX_FRAME_WAIT);
1271 fb_var_to_videomode(&par->mode, &info->var);
1273 par->cfg.bpp = info->var.bits_per_pixel;
1275 info->fix.visual = (par->cfg.bpp <= 8) ?
1276 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1277 info->fix.line_length = (par->mode.xres * par->cfg.bpp) / 8;
1279 ret = lcd_init(par, &par->cfg, &par->mode);
1280 if (ret < 0) {
1281 dev_err(par->dev, "lcd init failed\n");
1282 return ret;
1283 }
1285 par->dma_start = info->fix.smem_start +
1286 info->var.yoffset * info->fix.line_length +
1287 info->var.xoffset * info->var.bits_per_pixel / 8;
1288 par->dma_end = par->dma_start +
1289 info->var.yres * info->fix.line_length - 1;
1291 lcdc_write(par->dma_start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
1292 lcdc_write(par->dma_end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
1293 lcdc_write(par->dma_start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
1294 lcdc_write(par->dma_end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
1296 if (raster)
1297 lcd_enable_raster();
1299 return 0;
1300 }
1302 static struct fb_ops da8xx_fb_ops = {
1303 .owner = THIS_MODULE,
1304 .fb_check_var = fb_check_var,
1305 .fb_set_par = da8xxfb_set_par,
1306 .fb_setcolreg = fb_setcolreg,
1307 .fb_pan_display = da8xx_pan_display,
1308 .fb_ioctl = fb_ioctl,
1309 .fb_fillrect = cfb_fillrect,
1310 .fb_copyarea = cfb_copyarea,
1311 .fb_imageblit = cfb_imageblit,
1312 .fb_blank = cfb_blank,
1313 };
1315 static struct fb_videomode *da8xx_fb_get_videomode(struct platform_device *dev)
1316 {
1317 struct da8xx_lcdc_platform_data *fb_pdata = dev_get_platdata(&dev->dev);
1318 struct fb_videomode *lcdc_info;
1319 int i;
1321 for (i = 0, lcdc_info = known_lcd_panels;
1322 i < ARRAY_SIZE(known_lcd_panels); i++, lcdc_info++) {
1323 if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
1324 break;
1325 }
1327 if (i == ARRAY_SIZE(known_lcd_panels)) {
1328 dev_err(&dev->dev, "no panel found\n");
1329 return NULL;
1330 }
1331 dev_info(&dev->dev, "found %s panel\n", lcdc_info->name);
1333 return lcdc_info;
1334 }
1336 static int fb_probe(struct platform_device *device)
1337 {
1338 struct da8xx_lcdc_platform_data *fb_pdata =
1339 dev_get_platdata(&device->dev);
1340 static struct resource *lcdc_regs;
1341 struct lcd_ctrl_config *lcd_cfg;
1342 struct fb_videomode *lcdc_info;
1343 struct fb_info *da8xx_fb_info;
1344 struct da8xx_fb_par *par;
1345 struct clk *tmp_lcdc_clk;
1346 int ret;
1347 unsigned long ulcm;
1349 if (fb_pdata == NULL) {
1350 dev_err(&device->dev, "Can not get platform data\n");
1351 return -ENOENT;
1352 }
1354 lcdc_info = da8xx_fb_get_videomode(device);
1355 if (lcdc_info == NULL)
1356 return -ENODEV;
1358 lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0);
1359 da8xx_fb_reg_base = devm_ioremap_resource(&device->dev, lcdc_regs);
1360 if (IS_ERR(da8xx_fb_reg_base))
1361 return PTR_ERR(da8xx_fb_reg_base);
1363 tmp_lcdc_clk = devm_clk_get(&device->dev, "fck");
1364 if (IS_ERR(tmp_lcdc_clk)) {
1365 dev_err(&device->dev, "Can not get device clock\n");
1366 return PTR_ERR(tmp_lcdc_clk);
1367 }
1369 pm_runtime_enable(&device->dev);
1370 pm_runtime_get_sync(&device->dev);
1372 /*
1373 * disable creation of new console during suspend.
1374 * this works around a problem where a ctrl-c is needed
1375 * to be entered on the VT to actually get the device
1376 * to continue into the suspend state.
1377 */
1378 pm_set_vt_switch(0);
1380 /* Determine LCD IP Version */
1381 switch (lcdc_read(LCD_PID_REG)) {
1382 case 0x4C100102:
1383 lcd_revision = LCD_VERSION_1;
1384 break;
1385 case 0x4F200800:
1386 case 0x4F201000:
1387 lcd_revision = LCD_VERSION_2;
1388 break;
1389 default:
1390 dev_warn(&device->dev, "Unknown PID Reg value 0x%x, "
1391 "defaulting to LCD revision 1\n",
1392 lcdc_read(LCD_PID_REG));
1393 lcd_revision = LCD_VERSION_1;
1394 break;
1395 }
1397 lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
1399 if (!lcd_cfg) {
1400 ret = -EINVAL;
1401 goto err_pm_runtime_disable;
1402 }
1404 da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par),
1405 &device->dev);
1406 if (!da8xx_fb_info) {
1407 dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
1408 ret = -ENOMEM;
1409 goto err_pm_runtime_disable;
1410 }
1412 par = da8xx_fb_info->par;
1413 par->dev = &device->dev;
1414 par->lcdc_clk = tmp_lcdc_clk;
1415 par->lcdc_clk_rate = clk_get_rate(par->lcdc_clk);
1416 if (fb_pdata->panel_power_ctrl) {
1417 par->panel_power_ctrl = fb_pdata->panel_power_ctrl;
1418 par->panel_power_ctrl(1);
1419 }
1421 fb_videomode_to_var(&da8xx_fb_var, lcdc_info);
1422 par->cfg = *lcd_cfg;
1424 da8xx_fb_lcd_reset();
1426 /* allocate frame buffer */
1427 par->vram_size = lcdc_info->xres * lcdc_info->yres * lcd_cfg->bpp;
1428 ulcm = lcm((lcdc_info->xres * lcd_cfg->bpp)/8, PAGE_SIZE);
1429 par->vram_size = roundup(par->vram_size/8, ulcm);
1430 par->vram_size = par->vram_size * LCD_NUM_BUFFERS;
1432 par->vram_virt = dma_alloc_coherent(NULL,
1433 par->vram_size,
1434 (resource_size_t *) &par->vram_phys,
1435 GFP_KERNEL | GFP_DMA);
1436 if (!par->vram_virt) {
1437 dev_err(&device->dev,
1438 "GLCD: kmalloc for frame buffer failed\n");
1439 ret = -EINVAL;
1440 goto err_release_fb;
1441 }
1443 da8xx_fb_info->screen_base = (char __iomem *) par->vram_virt;
1444 da8xx_fb_fix.smem_start = par->vram_phys;
1445 da8xx_fb_fix.smem_len = par->vram_size;
1446 da8xx_fb_fix.line_length = (lcdc_info->xres * lcd_cfg->bpp) / 8;
1448 par->dma_start = par->vram_phys;
1449 par->dma_end = par->dma_start + lcdc_info->yres *
1450 da8xx_fb_fix.line_length - 1;
1452 /* allocate palette buffer */
1453 par->v_palette_base = dma_alloc_coherent(NULL,
1454 PALETTE_SIZE,
1455 (resource_size_t *)
1456 &par->p_palette_base,
1457 GFP_KERNEL | GFP_DMA);
1458 if (!par->v_palette_base) {
1459 dev_err(&device->dev,
1460 "GLCD: kmalloc for palette buffer failed\n");
1461 ret = -EINVAL;
1462 goto err_release_fb_mem;
1463 }
1464 memset(par->v_palette_base, 0, PALETTE_SIZE);
1466 par->irq = platform_get_irq(device, 0);
1467 if (par->irq < 0) {
1468 ret = -ENOENT;
1469 goto err_release_pl_mem;
1470 }
1472 da8xx_fb_var.grayscale =
1473 lcd_cfg->panel_shade == MONOCHROME ? 1 : 0;
1474 da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp;
1476 /* Initialize fbinfo */
1477 da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
1478 da8xx_fb_info->fix = da8xx_fb_fix;
1479 da8xx_fb_info->var = da8xx_fb_var;
1480 da8xx_fb_info->fbops = &da8xx_fb_ops;
1481 da8xx_fb_info->pseudo_palette = par->pseudo_palette;
1482 da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
1483 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1485 ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0);
1486 if (ret)
1487 goto err_release_pl_mem;
1488 da8xx_fb_info->cmap.len = par->palette_sz;
1490 /* initialize var_screeninfo */
1491 da8xx_fb_var.activate = FB_ACTIVATE_FORCE;
1492 fb_set_var(da8xx_fb_info, &da8xx_fb_var);
1494 dev_set_drvdata(&device->dev, da8xx_fb_info);
1496 /* initialize the vsync wait queue */
1497 init_waitqueue_head(&par->vsync_wait);
1498 par->vsync_timeout = HZ / 5;
1499 par->which_dma_channel_done = -1;
1500 spin_lock_init(&par->lock_for_chan_update);
1502 /* Register the Frame Buffer */
1503 if (register_framebuffer(da8xx_fb_info) < 0) {
1504 dev_err(&device->dev,
1505 "GLCD: Frame Buffer Registration Failed!\n");
1506 ret = -EINVAL;
1507 goto err_dealloc_cmap;
1508 }
1510 #ifdef CONFIG_CPU_FREQ
1511 ret = lcd_da8xx_cpufreq_register(par);
1512 if (ret) {
1513 dev_err(&device->dev, "failed to register cpufreq\n");
1514 goto err_cpu_freq;
1515 }
1516 #endif
1518 if (lcd_revision == LCD_VERSION_1)
1519 lcdc_irq_handler = lcdc_irq_handler_rev01;
1520 else {
1521 init_waitqueue_head(&frame_done_wq);
1522 lcdc_irq_handler = lcdc_irq_handler_rev02;
1523 }
1525 ret = devm_request_irq(&device->dev, par->irq, lcdc_irq_handler, 0,
1526 DRIVER_NAME, par);
1527 if (ret)
1528 goto irq_freq;
1529 return 0;
1531 irq_freq:
1532 #ifdef CONFIG_CPU_FREQ
1533 lcd_da8xx_cpufreq_deregister(par);
1534 err_cpu_freq:
1535 #endif
1536 unregister_framebuffer(da8xx_fb_info);
1538 err_dealloc_cmap:
1539 fb_dealloc_cmap(&da8xx_fb_info->cmap);
1541 err_release_pl_mem:
1542 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
1543 par->p_palette_base);
1545 err_release_fb_mem:
1546 dma_free_coherent(NULL, par->vram_size, par->vram_virt, par->vram_phys);
1548 err_release_fb:
1549 framebuffer_release(da8xx_fb_info);
1551 err_pm_runtime_disable:
1552 pm_runtime_put_sync(&device->dev);
1553 pm_runtime_disable(&device->dev);
1555 return ret;
1556 }
1558 #ifdef CONFIG_PM
1559 static struct lcdc_context {
1560 u32 clk_enable;
1561 u32 ctrl;
1562 u32 dma_ctrl;
1563 u32 raster_timing_0;
1564 u32 raster_timing_1;
1565 u32 raster_timing_2;
1566 u32 int_enable_set;
1567 u32 dma_frm_buf_base_addr_0;
1568 u32 dma_frm_buf_ceiling_addr_0;
1569 u32 dma_frm_buf_base_addr_1;
1570 u32 dma_frm_buf_ceiling_addr_1;
1571 u32 raster_ctrl;
1572 } reg_context;
1574 static void lcd_context_save(void)
1575 {
1576 if (lcd_revision == LCD_VERSION_2) {
1577 reg_context.clk_enable = lcdc_read(LCD_CLK_ENABLE_REG);
1578 reg_context.int_enable_set = lcdc_read(LCD_INT_ENABLE_SET_REG);
1579 }
1581 reg_context.ctrl = lcdc_read(LCD_CTRL_REG);
1582 reg_context.dma_ctrl = lcdc_read(LCD_DMA_CTRL_REG);
1583 reg_context.raster_timing_0 = lcdc_read(LCD_RASTER_TIMING_0_REG);
1584 reg_context.raster_timing_1 = lcdc_read(LCD_RASTER_TIMING_1_REG);
1585 reg_context.raster_timing_2 = lcdc_read(LCD_RASTER_TIMING_2_REG);
1586 reg_context.dma_frm_buf_base_addr_0 =
1587 lcdc_read(LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
1588 reg_context.dma_frm_buf_ceiling_addr_0 =
1589 lcdc_read(LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
1590 reg_context.dma_frm_buf_base_addr_1 =
1591 lcdc_read(LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
1592 reg_context.dma_frm_buf_ceiling_addr_1 =
1593 lcdc_read(LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
1594 reg_context.raster_ctrl = lcdc_read(LCD_RASTER_CTRL_REG);
1595 return;
1596 }
1598 static void lcd_context_restore(void)
1599 {
1600 if (lcd_revision == LCD_VERSION_2) {
1601 lcdc_write(reg_context.clk_enable, LCD_CLK_ENABLE_REG);
1602 lcdc_write(reg_context.int_enable_set, LCD_INT_ENABLE_SET_REG);
1603 }
1605 lcdc_write(reg_context.ctrl, LCD_CTRL_REG);
1606 lcdc_write(reg_context.dma_ctrl, LCD_DMA_CTRL_REG);
1607 lcdc_write(reg_context.raster_timing_0, LCD_RASTER_TIMING_0_REG);
1608 lcdc_write(reg_context.raster_timing_1, LCD_RASTER_TIMING_1_REG);
1609 lcdc_write(reg_context.raster_timing_2, LCD_RASTER_TIMING_2_REG);
1610 lcdc_write(reg_context.dma_frm_buf_base_addr_0,
1611 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
1612 lcdc_write(reg_context.dma_frm_buf_ceiling_addr_0,
1613 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
1614 lcdc_write(reg_context.dma_frm_buf_base_addr_1,
1615 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
1616 lcdc_write(reg_context.dma_frm_buf_ceiling_addr_1,
1617 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
1618 lcdc_write(reg_context.raster_ctrl, LCD_RASTER_CTRL_REG);
1619 return;
1620 }
1622 static int fb_suspend(struct platform_device *dev, pm_message_t state)
1623 {
1624 struct fb_info *info = platform_get_drvdata(dev);
1625 struct da8xx_fb_par *par = info->par;
1627 console_lock();
1628 if (par->panel_power_ctrl)
1629 par->panel_power_ctrl(0);
1631 fb_set_suspend(info, 1);
1632 lcd_disable_raster(DA8XX_FRAME_WAIT);
1633 lcd_context_save();
1634 pm_runtime_put_sync(&dev->dev);
1635 console_unlock();
1637 return 0;
1638 }
1639 static int fb_resume(struct platform_device *dev)
1640 {
1641 struct fb_info *info = platform_get_drvdata(dev);
1642 struct da8xx_fb_par *par = info->par;
1644 console_lock();
1645 pm_runtime_get_sync(&dev->dev);
1646 lcd_context_restore();
1647 if (par->blank == FB_BLANK_UNBLANK) {
1648 lcd_enable_raster();
1650 if (par->panel_power_ctrl)
1651 par->panel_power_ctrl(1);
1652 }
1654 fb_set_suspend(info, 0);
1655 console_unlock();
1657 return 0;
1658 }
1659 #else
1660 #define fb_suspend NULL
1661 #define fb_resume NULL
1662 #endif
1664 static struct platform_driver da8xx_fb_driver = {
1665 .probe = fb_probe,
1666 .remove = fb_remove,
1667 .suspend = fb_suspend,
1668 .resume = fb_resume,
1669 .driver = {
1670 .name = DRIVER_NAME,
1671 .owner = THIS_MODULE,
1672 },
1673 };
1674 module_platform_driver(da8xx_fb_driver);
1676 MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx");
1677 MODULE_AUTHOR("Texas Instruments");
1678 MODULE_LICENSE("GPL");