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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / video / da8xx-fb.c
blob29577bf1f559070044ee2c9f50d300d86745f78e
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/interrupt.h>
30 #include <linux/clk.h>
31 #include <linux/cpufreq.h>
32 #include <linux/console.h>
33 #include <linux/slab.h>
34 #include <video/da8xx-fb.h>
35
36 #define DRIVER_NAME "da8xx_lcdc"
37
38 #define LCD_VERSION_1 1
39 #define LCD_VERSION_2 2
40
41 /* LCD Status Register */
42 #define LCD_END_OF_FRAME1 BIT(9)
43 #define LCD_END_OF_FRAME0 BIT(8)
44 #define LCD_PL_LOAD_DONE BIT(6)
45 #define LCD_FIFO_UNDERFLOW BIT(5)
46 #define LCD_SYNC_LOST BIT(2)
47
48 /* LCD DMA Control Register */
49 #define LCD_DMA_BURST_SIZE(x) ((x) << 4)
50 #define LCD_DMA_BURST_1 0x0
51 #define LCD_DMA_BURST_2 0x1
52 #define LCD_DMA_BURST_4 0x2
53 #define LCD_DMA_BURST_8 0x3
54 #define LCD_DMA_BURST_16 0x4
55 #define LCD_V1_END_OF_FRAME_INT_ENA BIT(2)
56 #define LCD_V2_END_OF_FRAME0_INT_ENA BIT(8)
57 #define LCD_V2_END_OF_FRAME1_INT_ENA BIT(9)
58 #define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0)
59
60 /* LCD Control Register */
61 #define LCD_CLK_DIVISOR(x) ((x) << 8)
62 #define LCD_RASTER_MODE 0x01
63
64 /* LCD Raster Control Register */
65 #define LCD_PALETTE_LOAD_MODE(x) ((x) << 20)
66 #define PALETTE_AND_DATA 0x00
67 #define PALETTE_ONLY 0x01
68 #define DATA_ONLY 0x02
69
70 #define LCD_MONO_8BIT_MODE BIT(9)
71 #define LCD_RASTER_ORDER BIT(8)
72 #define LCD_TFT_MODE BIT(7)
73 #define LCD_V1_UNDERFLOW_INT_ENA BIT(6)
74 #define LCD_V2_UNDERFLOW_INT_ENA BIT(5)
75 #define LCD_V1_PL_INT_ENA BIT(4)
76 #define LCD_V2_PL_INT_ENA BIT(6)
77 #define LCD_MONOCHROME_MODE BIT(1)
78 #define LCD_RASTER_ENABLE BIT(0)
79 #define LCD_TFT_ALT_ENABLE BIT(23)
80 #define LCD_STN_565_ENABLE BIT(24)
81 #define LCD_V2_DMA_CLK_EN BIT(2)
82 #define LCD_V2_LIDD_CLK_EN BIT(1)
83 #define LCD_V2_CORE_CLK_EN BIT(0)
84 #define LCD_V2_LPP_B10 26
85
86 /* LCD Raster Timing 2 Register */
87 #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
88 #define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8)
89 #define LCD_SYNC_CTRL BIT(25)
90 #define LCD_SYNC_EDGE BIT(24)
91 #define LCD_INVERT_PIXEL_CLOCK BIT(22)
92 #define LCD_INVERT_LINE_CLOCK BIT(21)
93 #define LCD_INVERT_FRAME_CLOCK BIT(20)
94
95 /* LCD Block */
96 #define LCD_PID_REG 0x0
97 #define LCD_CTRL_REG 0x4
98 #define LCD_STAT_REG 0x8
99 #define LCD_RASTER_CTRL_REG 0x28
100 #define LCD_RASTER_TIMING_0_REG 0x2C
101 #define LCD_RASTER_TIMING_1_REG 0x30
102 #define LCD_RASTER_TIMING_2_REG 0x34
103 #define LCD_DMA_CTRL_REG 0x40
104 #define LCD_DMA_FRM_BUF_BASE_ADDR_0_REG 0x44
105 #define LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG 0x48
106 #define LCD_DMA_FRM_BUF_BASE_ADDR_1_REG 0x4C
107 #define LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG 0x50
108
109 /* Interrupt Registers available only in Version 2 */
110 #define LCD_RAW_STAT_REG 0x58
111 #define LCD_MASKED_STAT_REG 0x5c
112 #define LCD_INT_ENABLE_SET_REG 0x60
113 #define LCD_INT_ENABLE_CLR_REG 0x64
114 #define LCD_END_OF_INT_IND_REG 0x68
115
116 /* Clock registers available only on Version 2 */
117 #define LCD_CLK_ENABLE_REG 0x6c
118 #define LCD_CLK_RESET_REG 0x70
119 #define LCD_CLK_MAIN_RESET BIT(3)
120
121 #define LCD_NUM_BUFFERS 2
122
123 #define WSI_TIMEOUT 50
124 #define PALETTE_SIZE 256
125 #define LEFT_MARGIN 64
126 #define RIGHT_MARGIN 64
127 #define UPPER_MARGIN 32
128 #define LOWER_MARGIN 32
129
130 static resource_size_t da8xx_fb_reg_base;
131 static struct resource *lcdc_regs;
132 static unsigned int lcd_revision;
133 static irq_handler_t lcdc_irq_handler;
134
135 static inline unsigned int lcdc_read(unsigned int addr)
136 {
137 return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr));
138 }
139
140 static inline void lcdc_write(unsigned int val, unsigned int addr)
141 {
142 __raw_writel(val, da8xx_fb_reg_base + (addr));
143 }
144
145 struct da8xx_fb_par {
146 resource_size_t p_palette_base;
147 unsigned char *v_palette_base;
148 dma_addr_t vram_phys;
149 unsigned long vram_size;
150 void *vram_virt;
151 unsigned int dma_start;
152 unsigned int dma_end;
153 struct clk *lcdc_clk;
154 int irq;
155 unsigned short pseudo_palette[16];
156 unsigned int palette_sz;
157 unsigned int pxl_clk;
158 int blank;
159 wait_queue_head_t vsync_wait;
160 int vsync_flag;
161 int vsync_timeout;
162 #ifdef CONFIG_CPU_FREQ
163 struct notifier_block freq_transition;
164 #endif
165 void (*panel_power_ctrl)(int);
166 };
167
168 /* Variable Screen Information */
169 static struct fb_var_screeninfo da8xx_fb_var __devinitdata = {
170 .xoffset = 0,
171 .yoffset = 0,
172 .transp = {0, 0, 0},
173 .nonstd = 0,
174 .activate = 0,
175 .height = -1,
176 .width = -1,
177 .pixclock = 46666, /* 46us - AUO display */
178 .accel_flags = 0,
179 .left_margin = LEFT_MARGIN,
180 .right_margin = RIGHT_MARGIN,
181 .upper_margin = UPPER_MARGIN,
182 .lower_margin = LOWER_MARGIN,
183 .sync = 0,
184 .vmode = FB_VMODE_NONINTERLACED
185 };
186
187 static struct fb_fix_screeninfo da8xx_fb_fix __devinitdata = {
188 .id = "DA8xx FB Drv",
189 .type = FB_TYPE_PACKED_PIXELS,
190 .type_aux = 0,
191 .visual = FB_VISUAL_PSEUDOCOLOR,
192 .xpanstep = 0,
193 .ypanstep = 1,
194 .ywrapstep = 0,
195 .accel = FB_ACCEL_NONE
196 };
197
198 struct da8xx_panel {
199 const char name[25]; /* Full name <vendor>_<model> */
200 unsigned short width;
201 unsigned short height;
202 int hfp; /* Horizontal front porch */
203 int hbp; /* Horizontal back porch */
204 int hsw; /* Horizontal Sync Pulse Width */
205 int vfp; /* Vertical front porch */
206 int vbp; /* Vertical back porch */
207 int vsw; /* Vertical Sync Pulse Width */
208 unsigned int pxl_clk; /* Pixel clock */
209 unsigned char invert_pxl_clk; /* Invert Pixel clock */
210 };
211
212 static struct da8xx_panel known_lcd_panels[] = {
213 /* Sharp LCD035Q3DG01 */
214 [0] = {
215 .name = "Sharp_LCD035Q3DG01",
216 .width = 320,
217 .height = 240,
218 .hfp = 8,
219 .hbp = 6,
220 .hsw = 0,
221 .vfp = 2,
222 .vbp = 2,
223 .vsw = 0,
224 .pxl_clk = 4608000,
225 .invert_pxl_clk = 1,
226 },
227 /* Sharp LK043T1DG01 */
228 [1] = {
229 .name = "Sharp_LK043T1DG01",
230 .width = 480,
231 .height = 272,
232 .hfp = 2,
233 .hbp = 2,
234 .hsw = 41,
235 .vfp = 2,
236 .vbp = 2,
237 .vsw = 10,
238 .pxl_clk = 7833600,
239 .invert_pxl_clk = 0,
240 },
241 };
242
243 /* Enable the Raster Engine of the LCD Controller */
244 static inline void lcd_enable_raster(void)
245 {
246 u32 reg;
247
248 /* Bring LCDC out of reset */
249 if (lcd_revision == LCD_VERSION_2)
250 lcdc_write(0, LCD_CLK_RESET_REG);
251
252 reg = lcdc_read(LCD_RASTER_CTRL_REG);
253 if (!(reg & LCD_RASTER_ENABLE))
254 lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
255 }
256
257 /* Disable the Raster Engine of the LCD Controller */
258 static inline void lcd_disable_raster(void)
259 {
260 u32 reg;
261
262 reg = lcdc_read(LCD_RASTER_CTRL_REG);
263 if (reg & LCD_RASTER_ENABLE)
264 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
265
266 if (lcd_revision == LCD_VERSION_2)
267 /* Write 1 to reset LCDC */
268 lcdc_write(LCD_CLK_MAIN_RESET, LCD_CLK_RESET_REG);
269 }
270
271 static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
272 {
273 u32 start;
274 u32 end;
275 u32 reg_ras;
276 u32 reg_dma;
277 u32 reg_int;
278
279 /* init reg to clear PLM (loading mode) fields */
280 reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
281 reg_ras &= ~(3 << 20);
282
283 reg_dma = lcdc_read(LCD_DMA_CTRL_REG);
284
285 if (load_mode == LOAD_DATA) {
286 start = par->dma_start;
287 end = par->dma_end;
288
289 reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY);
290 if (lcd_revision == LCD_VERSION_1) {
291 reg_dma |= LCD_V1_END_OF_FRAME_INT_ENA;
292 } else {
293 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
294 LCD_V2_END_OF_FRAME0_INT_ENA |
295 LCD_V2_END_OF_FRAME1_INT_ENA;
296 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
297 }
298 reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
299
300 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
301 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
302 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
303 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
304 } else if (load_mode == LOAD_PALETTE) {
305 start = par->p_palette_base;
306 end = start + par->palette_sz - 1;
307
308 reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
309
310 if (lcd_revision == LCD_VERSION_1) {
311 reg_ras |= LCD_V1_PL_INT_ENA;
312 } else {
313 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
314 LCD_V2_PL_INT_ENA;
315 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
316 }
317
318 lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
319 lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
320 }
321
322 lcdc_write(reg_dma, LCD_DMA_CTRL_REG);
323 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
324
325 /*
326 * The Raster enable bit must be set after all other control fields are
327 * set.
328 */
329 lcd_enable_raster();
330 }
331
332 /* Configure the Burst Size of DMA */
333 static int lcd_cfg_dma(int burst_size)
334 {
335 u32 reg;
336
337 reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001;
338 switch (burst_size) {
339 case 1:
340 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
341 break;
342 case 2:
343 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
344 break;
345 case 4:
346 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
347 break;
348 case 8:
349 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
350 break;
351 case 16:
352 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
353 break;
354 default:
355 return -EINVAL;
356 }
357 lcdc_write(reg, LCD_DMA_CTRL_REG);
358
359 return 0;
360 }
361
362 static void lcd_cfg_ac_bias(int period, int transitions_per_int)
363 {
364 u32 reg;
365
366 /* Set the AC Bias Period and Number of Transisitons per Interrupt */
367 reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000;
368 reg |= LCD_AC_BIAS_FREQUENCY(period) |
369 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
370 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
371 }
372
373 static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
374 int front_porch)
375 {
376 u32 reg;
377
378 reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf;
379 reg |= ((back_porch & 0xff) << 24)
380 | ((front_porch & 0xff) << 16)
381 | ((pulse_width & 0x3f) << 10);
382 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
383 }
384
385 static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
386 int front_porch)
387 {
388 u32 reg;
389
390 reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
391 reg |= ((back_porch & 0xff) << 24)
392 | ((front_porch & 0xff) << 16)
393 | ((pulse_width & 0x3f) << 10);
394 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
395 }
396
397 static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
398 {
399 u32 reg;
400 u32 reg_int;
401
402 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE |
403 LCD_MONO_8BIT_MODE |
404 LCD_MONOCHROME_MODE);
405
406 switch (cfg->p_disp_panel->panel_shade) {
407 case MONOCHROME:
408 reg |= LCD_MONOCHROME_MODE;
409 if (cfg->mono_8bit_mode)
410 reg |= LCD_MONO_8BIT_MODE;
411 break;
412 case COLOR_ACTIVE:
413 reg |= LCD_TFT_MODE;
414 if (cfg->tft_alt_mode)
415 reg |= LCD_TFT_ALT_ENABLE;
416 break;
417
418 case COLOR_PASSIVE:
419 if (cfg->stn_565_mode)
420 reg |= LCD_STN_565_ENABLE;
421 break;
422
423 default:
424 return -EINVAL;
425 }
426
427 /* enable additional interrupts here */
428 if (lcd_revision == LCD_VERSION_1) {
429 reg |= LCD_V1_UNDERFLOW_INT_ENA;
430 } else {
431 reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
432 LCD_V2_UNDERFLOW_INT_ENA;
433 lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
434 }
435
436 lcdc_write(reg, LCD_RASTER_CTRL_REG);
437
438 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
439
440 if (cfg->sync_ctrl)
441 reg |= LCD_SYNC_CTRL;
442 else
443 reg &= ~LCD_SYNC_CTRL;
444
445 if (cfg->sync_edge)
446 reg |= LCD_SYNC_EDGE;
447 else
448 reg &= ~LCD_SYNC_EDGE;
449
450 if (cfg->invert_line_clock)
451 reg |= LCD_INVERT_LINE_CLOCK;
452 else
453 reg &= ~LCD_INVERT_LINE_CLOCK;
454
455 if (cfg->invert_frm_clock)
456 reg |= LCD_INVERT_FRAME_CLOCK;
457 else
458 reg &= ~LCD_INVERT_FRAME_CLOCK;
459
460 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
461
462 return 0;
463 }
464
465 static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
466 u32 bpp, u32 raster_order)
467 {
468 u32 reg;
469
470 /* Set the Panel Width */
471 /* Pixels per line = (PPL + 1)*16 */
472 if (lcd_revision == LCD_VERSION_1) {
473 /*
474 * 0x3F in bits 4..9 gives max horizontal resolution = 1024
475 * pixels.
476 */
477 width &= 0x3f0;
478 } else {
479 /*
480 * 0x7F in bits 4..10 gives max horizontal resolution = 2048
481 * pixels.
482 */
483 width &= 0x7f0;
484 }
485
486 reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
487 reg &= 0xfffffc00;
488 if (lcd_revision == LCD_VERSION_1) {
489 reg |= ((width >> 4) - 1) << 4;
490 } else {
491 width = (width >> 4) - 1;
492 reg |= ((width & 0x3f) << 4) | ((width & 0x40) >> 3);
493 }
494 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
495
496 /* Set the Panel Height */
497 /* Set bits 9:0 of Lines Per Pixel */
498 reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
499 reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
500 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
501
502 /* Set bit 10 of Lines Per Pixel */
503 if (lcd_revision == LCD_VERSION_2) {
504 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
505 reg |= ((height - 1) & 0x400) << 16;
506 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
507 }
508
509 /* Set the Raster Order of the Frame Buffer */
510 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
511 if (raster_order)
512 reg |= LCD_RASTER_ORDER;
513 lcdc_write(reg, LCD_RASTER_CTRL_REG);
514
515 switch (bpp) {
516 case 1:
517 case 2:
518 case 4:
519 case 16:
520 par->palette_sz = 16 * 2;
521 break;
522
523 case 8:
524 par->palette_sz = 256 * 2;
525 break;
526
527 default:
528 return -EINVAL;
529 }
530
531 return 0;
532 }
533
534 static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
535 unsigned blue, unsigned transp,
536 struct fb_info *info)
537 {
538 struct da8xx_fb_par *par = info->par;
539 unsigned short *palette = (unsigned short *) par->v_palette_base;
540 u_short pal;
541 int update_hw = 0;
542
543 if (regno > 255)
544 return 1;
545
546 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
547 return 1;
548
549 if (info->var.bits_per_pixel == 8) {
550 red >>= 4;
551 green >>= 8;
552 blue >>= 12;
553
554 pal = (red & 0x0f00);
555 pal |= (green & 0x00f0);
556 pal |= (blue & 0x000f);
557
558 if (palette[regno] != pal) {
559 update_hw = 1;
560 palette[regno] = pal;
561 }
562 } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
563 red >>= (16 - info->var.red.length);
564 red <<= info->var.red.offset;
565
566 green >>= (16 - info->var.green.length);
567 green <<= info->var.green.offset;
568
569 blue >>= (16 - info->var.blue.length);
570 blue <<= info->var.blue.offset;
571
572 par->pseudo_palette[regno] = red | green | blue;
573
574 if (palette[0] != 0x4000) {
575 update_hw = 1;
576 palette[0] = 0x4000;
577 }
578 }
579
580 /* Update the palette in the h/w as needed. */
581 if (update_hw)
582 lcd_blit(LOAD_PALETTE, par);
583
584 return 0;
585 }
586
587 static void lcd_reset(struct da8xx_fb_par *par)
588 {
589 /* Disable the Raster if previously Enabled */
590 lcd_disable_raster();
591
592 /* DMA has to be disabled */
593 lcdc_write(0, LCD_DMA_CTRL_REG);
594 lcdc_write(0, LCD_RASTER_CTRL_REG);
595
596 if (lcd_revision == LCD_VERSION_2) {
597 lcdc_write(0, LCD_INT_ENABLE_SET_REG);
598 /* Write 1 to reset */
599 lcdc_write(LCD_CLK_MAIN_RESET, LCD_CLK_RESET_REG);
600 lcdc_write(0, LCD_CLK_RESET_REG);
601 }
602 }
603
604 static void lcd_calc_clk_divider(struct da8xx_fb_par *par)
605 {
606 unsigned int lcd_clk, div;
607
608 lcd_clk = clk_get_rate(par->lcdc_clk);
609 div = lcd_clk / par->pxl_clk;
610
611 /* Configure the LCD clock divisor. */
612 lcdc_write(LCD_CLK_DIVISOR(div) |
613 (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
614
615 if (lcd_revision == LCD_VERSION_2)
616 lcdc_write(LCD_V2_DMA_CLK_EN | LCD_V2_LIDD_CLK_EN |
617 LCD_V2_CORE_CLK_EN, LCD_CLK_ENABLE_REG);
618
619 }
620
621 static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
622 struct da8xx_panel *panel)
623 {
624 u32 bpp;
625 int ret = 0;
626
627 lcd_reset(par);
628
629 /* Calculate the divider */
630 lcd_calc_clk_divider(par);
631
632 if (panel->invert_pxl_clk)
633 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
634 LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
635 else
636 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
637 ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
638
639 /* Configure the DMA burst size. */
640 ret = lcd_cfg_dma(cfg->dma_burst_sz);
641 if (ret < 0)
642 return ret;
643
644 /* Configure the AC bias properties. */
645 lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
646
647 /* Configure the vertical and horizontal sync properties. */
648 lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp);
649 lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp);
650
651 /* Configure for disply */
652 ret = lcd_cfg_display(cfg);
653 if (ret < 0)
654 return ret;
655
656 if (QVGA != cfg->p_disp_panel->panel_type)
657 return -EINVAL;
658
659 if (cfg->bpp <= cfg->p_disp_panel->max_bpp &&
660 cfg->bpp >= cfg->p_disp_panel->min_bpp)
661 bpp = cfg->bpp;
662 else
663 bpp = cfg->p_disp_panel->max_bpp;
664 if (bpp == 12)
665 bpp = 16;
666 ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width,
667 (unsigned int)panel->height, bpp,
668 cfg->raster_order);
669 if (ret < 0)
670 return ret;
671
672 /* Configure FDD */
673 lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) |
674 (cfg->fdd << 12), LCD_RASTER_CTRL_REG);
675
676 return 0;
677 }
678
679 /* IRQ handler for version 2 of LCDC */
680 static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg)
681 {
682 struct da8xx_fb_par *par = arg;
683 u32 stat = lcdc_read(LCD_MASKED_STAT_REG);
684 u32 reg_int;
685
686 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
687 lcd_disable_raster();
688 lcdc_write(stat, LCD_MASKED_STAT_REG);
689 lcd_enable_raster();
690 } else if (stat & LCD_PL_LOAD_DONE) {
691 /*
692 * Must disable raster before changing state of any control bit.
693 * And also must be disabled before clearing the PL loading
694 * interrupt via the following write to the status register. If
695 * this is done after then one gets multiple PL done interrupts.
696 */
697 lcd_disable_raster();
698
699 lcdc_write(stat, LCD_MASKED_STAT_REG);
700
701 /* Disable PL completion inerrupt */
702 reg_int = lcdc_read(LCD_INT_ENABLE_CLR_REG) |
703 (LCD_V2_PL_INT_ENA);
704 lcdc_write(reg_int, LCD_INT_ENABLE_CLR_REG);
705
706 /* Setup and start data loading mode */
707 lcd_blit(LOAD_DATA, par);
708 } else {
709 lcdc_write(stat, LCD_MASKED_STAT_REG);
710
711 if (stat & LCD_END_OF_FRAME0) {
712 lcdc_write(par->dma_start,
713 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
714 lcdc_write(par->dma_end,
715 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
716 par->vsync_flag = 1;
717 wake_up_interruptible(&par->vsync_wait);
718 }
719
720 if (stat & LCD_END_OF_FRAME1) {
721 lcdc_write(par->dma_start,
722 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
723 lcdc_write(par->dma_end,
724 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
725 par->vsync_flag = 1;
726 wake_up_interruptible(&par->vsync_wait);
727 }
728 }
729
730 lcdc_write(0, LCD_END_OF_INT_IND_REG);
731 return IRQ_HANDLED;
732 }
733
734 /* IRQ handler for version 1 LCDC */
735 static irqreturn_t lcdc_irq_handler_rev01(int irq, void *arg)
736 {
737 struct da8xx_fb_par *par = arg;
738 u32 stat = lcdc_read(LCD_STAT_REG);
739 u32 reg_ras;
740
741 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
742 lcd_disable_raster();
743 lcdc_write(stat, LCD_STAT_REG);
744 lcd_enable_raster();
745 } else if (stat & LCD_PL_LOAD_DONE) {
746 /*
747 * Must disable raster before changing state of any control bit.
748 * And also must be disabled before clearing the PL loading
749 * interrupt via the following write to the status register. If
750 * this is done after then one gets multiple PL done interrupts.
751 */
752 lcd_disable_raster();
753
754 lcdc_write(stat, LCD_STAT_REG);
755
756 /* Disable PL completion inerrupt */
757 reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
758 reg_ras &= ~LCD_V1_PL_INT_ENA;
759 lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
760
761 /* Setup and start data loading mode */
762 lcd_blit(LOAD_DATA, par);
763 } else {
764 lcdc_write(stat, LCD_STAT_REG);
765
766 if (stat & LCD_END_OF_FRAME0) {
767 lcdc_write(par->dma_start,
768 LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
769 lcdc_write(par->dma_end,
770 LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
771 par->vsync_flag = 1;
772 wake_up_interruptible(&par->vsync_wait);
773 }
774
775 if (stat & LCD_END_OF_FRAME1) {
776 lcdc_write(par->dma_start,
777 LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
778 lcdc_write(par->dma_end,
779 LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
780 par->vsync_flag = 1;
781 wake_up_interruptible(&par->vsync_wait);
782 }
783 }
784
785 return IRQ_HANDLED;
786 }
787
788 static int fb_check_var(struct fb_var_screeninfo *var,
789 struct fb_info *info)
790 {
791 int err = 0;
792
793 switch (var->bits_per_pixel) {
794 case 1:
795 case 8:
796 var->red.offset = 0;
797 var->red.length = 8;
798 var->green.offset = 0;
799 var->green.length = 8;
800 var->blue.offset = 0;
801 var->blue.length = 8;
802 var->transp.offset = 0;
803 var->transp.length = 0;
804 break;
805 case 4:
806 var->red.offset = 0;
807 var->red.length = 4;
808 var->green.offset = 0;
809 var->green.length = 4;
810 var->blue.offset = 0;
811 var->blue.length = 4;
812 var->transp.offset = 0;
813 var->transp.length = 0;
814 break;
815 case 16: /* RGB 565 */
816 var->red.offset = 11;
817 var->red.length = 5;
818 var->green.offset = 5;
819 var->green.length = 6;
820 var->blue.offset = 0;
821 var->blue.length = 5;
822 var->transp.offset = 0;
823 var->transp.length = 0;
824 break;
825 default:
826 err = -EINVAL;
827 }
828
829 var->red.msb_right = 0;
830 var->green.msb_right = 0;
831 var->blue.msb_right = 0;
832 var->transp.msb_right = 0;
833 return err;
834 }
835
836 #ifdef CONFIG_CPU_FREQ
837 static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
838 unsigned long val, void *data)
839 {
840 struct da8xx_fb_par *par;
841
842 par = container_of(nb, struct da8xx_fb_par, freq_transition);
843 if (val == CPUFREQ_PRECHANGE) {
844 lcd_disable_raster();
845 } else if (val == CPUFREQ_POSTCHANGE) {
846 lcd_calc_clk_divider(par);
847 lcd_enable_raster();
848 }
849
850 return 0;
851 }
852
853 static inline int lcd_da8xx_cpufreq_register(struct da8xx_fb_par *par)
854 {
855 par->freq_transition.notifier_call = lcd_da8xx_cpufreq_transition;
856
857 return cpufreq_register_notifier(&par->freq_transition,
858 CPUFREQ_TRANSITION_NOTIFIER);
859 }
860
861 static inline void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par)
862 {
863 cpufreq_unregister_notifier(&par->freq_transition,
864 CPUFREQ_TRANSITION_NOTIFIER);
865 }
866 #endif
867
868 static int __devexit fb_remove(struct platform_device *dev)
869 {
870 struct fb_info *info = dev_get_drvdata(&dev->dev);
871
872 if (info) {
873 struct da8xx_fb_par *par = info->par;
874
875 #ifdef CONFIG_CPU_FREQ
876 lcd_da8xx_cpufreq_deregister(par);
877 #endif
878 if (par->panel_power_ctrl)
879 par->panel_power_ctrl(0);
880
881 lcd_disable_raster();
882 lcdc_write(0, LCD_RASTER_CTRL_REG);
883
884 /* disable DMA */
885 lcdc_write(0, LCD_DMA_CTRL_REG);
886
887 unregister_framebuffer(info);
888 fb_dealloc_cmap(&info->cmap);
889 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
890 par->p_palette_base);
891 dma_free_coherent(NULL, par->vram_size, par->vram_virt,
892 par->vram_phys);
893 free_irq(par->irq, par);
894 clk_disable(par->lcdc_clk);
895 clk_put(par->lcdc_clk);
896 framebuffer_release(info);
897 iounmap((void __iomem *)da8xx_fb_reg_base);
898 release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
899
900 }
901 return 0;
902 }
903
904 /*
905 * Function to wait for vertical sync which for this LCD peripheral
906 * translates into waiting for the current raster frame to complete.
907 */
908 static int fb_wait_for_vsync(struct fb_info *info)
909 {
910 struct da8xx_fb_par *par = info->par;
911 int ret;
912
913 /*
914 * Set flag to 0 and wait for isr to set to 1. It would seem there is a
915 * race condition here where the ISR could have occurred just before or
916 * just after this set. But since we are just coarsely waiting for
917 * a frame to complete then that's OK. i.e. if the frame completed
918 * just before this code executed then we have to wait another full
919 * frame time but there is no way to avoid such a situation. On the
920 * other hand if the frame completed just after then we don't need
921 * to wait long at all. Either way we are guaranteed to return to the
922 * user immediately after a frame completion which is all that is
923 * required.
924 */
925 par->vsync_flag = 0;
926 ret = wait_event_interruptible_timeout(par->vsync_wait,
927 par->vsync_flag != 0,
928 par->vsync_timeout);
929 if (ret < 0)
930 return ret;
931 if (ret == 0)
932 return -ETIMEDOUT;
933
934 return 0;
935 }
936
937 static int fb_ioctl(struct fb_info *info, unsigned int cmd,
938 unsigned long arg)
939 {
940 struct lcd_sync_arg sync_arg;
941
942 switch (cmd) {
943 case FBIOGET_CONTRAST:
944 case FBIOPUT_CONTRAST:
945 case FBIGET_BRIGHTNESS:
946 case FBIPUT_BRIGHTNESS:
947 case FBIGET_COLOR:
948 case FBIPUT_COLOR:
949 return -ENOTTY;
950 case FBIPUT_HSYNC:
951 if (copy_from_user(&sync_arg, (char *)arg,
952 sizeof(struct lcd_sync_arg)))
953 return -EFAULT;
954 lcd_cfg_horizontal_sync(sync_arg.back_porch,
955 sync_arg.pulse_width,
956 sync_arg.front_porch);
957 break;
958 case FBIPUT_VSYNC:
959 if (copy_from_user(&sync_arg, (char *)arg,
960 sizeof(struct lcd_sync_arg)))
961 return -EFAULT;
962 lcd_cfg_vertical_sync(sync_arg.back_porch,
963 sync_arg.pulse_width,
964 sync_arg.front_porch);
965 break;
966 case FBIO_WAITFORVSYNC:
967 return fb_wait_for_vsync(info);
968 default:
969 return -EINVAL;
970 }
971 return 0;
972 }
973
974 static int cfb_blank(int blank, struct fb_info *info)
975 {
976 struct da8xx_fb_par *par = info->par;
977 int ret = 0;
978
979 if (par->blank == blank)
980 return 0;
981
982 par->blank = blank;
983 switch (blank) {
984 case FB_BLANK_UNBLANK:
985 if (par->panel_power_ctrl)
986 par->panel_power_ctrl(1);
987
988 lcd_enable_raster();
989 break;
990 case FB_BLANK_POWERDOWN:
991 if (par->panel_power_ctrl)
992 par->panel_power_ctrl(0);
993
994 lcd_disable_raster();
995 break;
996 default:
997 ret = -EINVAL;
998 }
999
1000 return ret;
1001 }
1002
1003 /*
1004 * Set new x,y offsets in the virtual display for the visible area and switch
1005 * to the new mode.
1006 */
1007 static int da8xx_pan_display(struct fb_var_screeninfo *var,
1008 struct fb_info *fbi)
1009 {
1010 int ret = 0;
1011 struct fb_var_screeninfo new_var;
1012 struct da8xx_fb_par *par = fbi->par;
1013 struct fb_fix_screeninfo *fix = &fbi->fix;
1014 unsigned int end;
1015 unsigned int start;
1016
1017 if (var->xoffset != fbi->var.xoffset ||
1018 var->yoffset != fbi->var.yoffset) {
1019 memcpy(&new_var, &fbi->var, sizeof(new_var));
1020 new_var.xoffset = var->xoffset;
1021 new_var.yoffset = var->yoffset;
1022 if (fb_check_var(&new_var, fbi))
1023 ret = -EINVAL;
1024 else {
1025 memcpy(&fbi->var, &new_var, sizeof(new_var));
1026
1027 start = fix->smem_start +
1028 new_var.yoffset * fix->line_length +
1029 new_var.xoffset * fbi->var.bits_per_pixel / 8;
1030 end = start + fbi->var.yres * fix->line_length - 1;
1031 par->dma_start = start;
1032 par->dma_end = end;
1033 }
1034 }
1035
1036 return ret;
1037 }
1038
1039 static struct fb_ops da8xx_fb_ops = {
1040 .owner = THIS_MODULE,
1041 .fb_check_var = fb_check_var,
1042 .fb_setcolreg = fb_setcolreg,
1043 .fb_pan_display = da8xx_pan_display,
1044 .fb_ioctl = fb_ioctl,
1045 .fb_fillrect = cfb_fillrect,
1046 .fb_copyarea = cfb_copyarea,
1047 .fb_imageblit = cfb_imageblit,
1048 .fb_blank = cfb_blank,
1049 };
1050
1051 static int __devinit fb_probe(struct platform_device *device)
1052 {
1053 struct da8xx_lcdc_platform_data *fb_pdata =
1054 device->dev.platform_data;
1055 struct lcd_ctrl_config *lcd_cfg;
1056 struct da8xx_panel *lcdc_info;
1057 struct fb_info *da8xx_fb_info;
1058 struct clk *fb_clk = NULL;
1059 struct da8xx_fb_par *par;
1060 resource_size_t len;
1061 int ret, i;
1062
1063 if (fb_pdata == NULL) {
1064 dev_err(&device->dev, "Can not get platform data\n");
1065 return -ENOENT;
1066 }
1067
1068 lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0);
1069 if (!lcdc_regs) {
1070 dev_err(&device->dev,
1071 "Can not get memory resource for LCD controller\n");
1072 return -ENOENT;
1073 }
1074
1075 len = resource_size(lcdc_regs);
1076
1077 lcdc_regs = request_mem_region(lcdc_regs->start, len, lcdc_regs->name);
1078 if (!lcdc_regs)
1079 return -EBUSY;
1080
1081 da8xx_fb_reg_base = (resource_size_t)ioremap(lcdc_regs->start, len);
1082 if (!da8xx_fb_reg_base) {
1083 ret = -EBUSY;
1084 goto err_request_mem;
1085 }
1086
1087 fb_clk = clk_get(&device->dev, NULL);
1088 if (IS_ERR(fb_clk)) {
1089 dev_err(&device->dev, "Can not get device clock\n");
1090 ret = -ENODEV;
1091 goto err_ioremap;
1092 }
1093 ret = clk_enable(fb_clk);
1094 if (ret)
1095 goto err_clk_put;
1096
1097 /* Determine LCD IP Version */
1098 switch (lcdc_read(LCD_PID_REG)) {
1099 case 0x4C100102:
1100 lcd_revision = LCD_VERSION_1;
1101 break;
1102 case 0x4F200800:
1103 lcd_revision = LCD_VERSION_2;
1104 break;
1105 default:
1106 dev_warn(&device->dev, "Unknown PID Reg value 0x%x, "
1107 "defaulting to LCD revision 1\n",
1108 lcdc_read(LCD_PID_REG));
1109 lcd_revision = LCD_VERSION_1;
1110 break;
1111 }
1112
1113 for (i = 0, lcdc_info = known_lcd_panels;
1114 i < ARRAY_SIZE(known_lcd_panels);
1115 i++, lcdc_info++) {
1116 if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
1117 break;
1118 }
1119
1120 if (i == ARRAY_SIZE(known_lcd_panels)) {
1121 dev_err(&device->dev, "GLCD: No valid panel found\n");
1122 ret = -ENODEV;
1123 goto err_clk_disable;
1124 } else
1125 dev_info(&device->dev, "GLCD: Found %s panel\n",
1126 fb_pdata->type);
1127
1128 lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
1129
1130 da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par),
1131 &device->dev);
1132 if (!da8xx_fb_info) {
1133 dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
1134 ret = -ENOMEM;
1135 goto err_clk_disable;
1136 }
1137
1138 par = da8xx_fb_info->par;
1139 par->lcdc_clk = fb_clk;
1140 par->pxl_clk = lcdc_info->pxl_clk;
1141 if (fb_pdata->panel_power_ctrl) {
1142 par->panel_power_ctrl = fb_pdata->panel_power_ctrl;
1143 par->panel_power_ctrl(1);
1144 }
1145
1146 if (lcd_init(par, lcd_cfg, lcdc_info) < 0) {
1147 dev_err(&device->dev, "lcd_init failed\n");
1148 ret = -EFAULT;
1149 goto err_release_fb;
1150 }
1151
1152 /* allocate frame buffer */
1153 par->vram_size = lcdc_info->width * lcdc_info->height * lcd_cfg->bpp;
1154 par->vram_size = PAGE_ALIGN(par->vram_size/8);
1155 par->vram_size = par->vram_size * LCD_NUM_BUFFERS;
1156
1157 par->vram_virt = dma_alloc_coherent(NULL,
1158 par->vram_size,
1159 (resource_size_t *) &par->vram_phys,
1160 GFP_KERNEL | GFP_DMA);
1161 if (!par->vram_virt) {
1162 dev_err(&device->dev,
1163 "GLCD: kmalloc for frame buffer failed\n");
1164 ret = -EINVAL;
1165 goto err_release_fb;
1166 }
1167
1168 da8xx_fb_info->screen_base = (char __iomem *) par->vram_virt;
1169 da8xx_fb_fix.smem_start = par->vram_phys;
1170 da8xx_fb_fix.smem_len = par->vram_size;
1171 da8xx_fb_fix.line_length = (lcdc_info->width * lcd_cfg->bpp) / 8;
1172
1173 par->dma_start = par->vram_phys;
1174 par->dma_end = par->dma_start + lcdc_info->height *
1175 da8xx_fb_fix.line_length - 1;
1176
1177 /* allocate palette buffer */
1178 par->v_palette_base = dma_alloc_coherent(NULL,
1179 PALETTE_SIZE,
1180 (resource_size_t *)
1181 &par->p_palette_base,
1182 GFP_KERNEL | GFP_DMA);
1183 if (!par->v_palette_base) {
1184 dev_err(&device->dev,
1185 "GLCD: kmalloc for palette buffer failed\n");
1186 ret = -EINVAL;
1187 goto err_release_fb_mem;
1188 }
1189 memset(par->v_palette_base, 0, PALETTE_SIZE);
1190
1191 par->irq = platform_get_irq(device, 0);
1192 if (par->irq < 0) {
1193 ret = -ENOENT;
1194 goto err_release_pl_mem;
1195 }
1196
1197 /* Initialize par */
1198 da8xx_fb_info->var.bits_per_pixel = lcd_cfg->bpp;
1199
1200 da8xx_fb_var.xres = lcdc_info->width;
1201 da8xx_fb_var.xres_virtual = lcdc_info->width;
1202
1203 da8xx_fb_var.yres = lcdc_info->height;
1204 da8xx_fb_var.yres_virtual = lcdc_info->height * LCD_NUM_BUFFERS;
1205
1206 da8xx_fb_var.grayscale =
1207 lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0;
1208 da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp;
1209
1210 da8xx_fb_var.hsync_len = lcdc_info->hsw;
1211 da8xx_fb_var.vsync_len = lcdc_info->vsw;
1212
1213 /* Initialize fbinfo */
1214 da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
1215 da8xx_fb_info->fix = da8xx_fb_fix;
1216 da8xx_fb_info->var = da8xx_fb_var;
1217 da8xx_fb_info->fbops = &da8xx_fb_ops;
1218 da8xx_fb_info->pseudo_palette = par->pseudo_palette;
1219 da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
1220 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1221
1222 ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0);
1223 if (ret)
1224 goto err_release_pl_mem;
1225 da8xx_fb_info->cmap.len = par->palette_sz;
1226
1227 /* initialize var_screeninfo */
1228 da8xx_fb_var.activate = FB_ACTIVATE_FORCE;
1229 fb_set_var(da8xx_fb_info, &da8xx_fb_var);
1230
1231 dev_set_drvdata(&device->dev, da8xx_fb_info);
1232
1233 /* initialize the vsync wait queue */
1234 init_waitqueue_head(&par->vsync_wait);
1235 par->vsync_timeout = HZ / 5;
1236
1237 /* Register the Frame Buffer */
1238 if (register_framebuffer(da8xx_fb_info) < 0) {
1239 dev_err(&device->dev,
1240 "GLCD: Frame Buffer Registration Failed!\n");
1241 ret = -EINVAL;
1242 goto err_dealloc_cmap;
1243 }
1244
1245 #ifdef CONFIG_CPU_FREQ
1246 ret = lcd_da8xx_cpufreq_register(par);
1247 if (ret) {
1248 dev_err(&device->dev, "failed to register cpufreq\n");
1249 goto err_cpu_freq;
1250 }
1251 #endif
1252
1253 if (lcd_revision == LCD_VERSION_1)
1254 lcdc_irq_handler = lcdc_irq_handler_rev01;
1255 else
1256 lcdc_irq_handler = lcdc_irq_handler_rev02;
1257
1258 ret = request_irq(par->irq, lcdc_irq_handler, 0,
1259 DRIVER_NAME, par);
1260 if (ret)
1261 goto irq_freq;
1262 return 0;
1263
1264 irq_freq:
1265 #ifdef CONFIG_CPU_FREQ
1266 lcd_da8xx_cpufreq_deregister(par);
1267 #endif
1268 err_cpu_freq:
1269 unregister_framebuffer(da8xx_fb_info);
1270
1271 err_dealloc_cmap:
1272 fb_dealloc_cmap(&da8xx_fb_info->cmap);
1273
1274 err_release_pl_mem:
1275 dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base,
1276 par->p_palette_base);
1277
1278 err_release_fb_mem:
1279 dma_free_coherent(NULL, par->vram_size, par->vram_virt, par->vram_phys);
1280
1281 err_release_fb:
1282 framebuffer_release(da8xx_fb_info);
1283
1284 err_clk_disable:
1285 clk_disable(fb_clk);
1286
1287 err_clk_put:
1288 clk_put(fb_clk);
1289
1290 err_ioremap:
1291 iounmap((void __iomem *)da8xx_fb_reg_base);
1292
1293 err_request_mem:
1294 release_mem_region(lcdc_regs->start, len);
1295
1296 return ret;
1297 }
1298
1299 #ifdef CONFIG_PM
1300 static int fb_suspend(struct platform_device *dev, pm_message_t state)
1301 {
1302 struct fb_info *info = platform_get_drvdata(dev);
1303 struct da8xx_fb_par *par = info->par;
1304
1305 console_lock();
1306 if (par->panel_power_ctrl)
1307 par->panel_power_ctrl(0);
1308
1309 fb_set_suspend(info, 1);
1310 lcd_disable_raster();
1311 clk_disable(par->lcdc_clk);
1312 console_unlock();
1313
1314 return 0;
1315 }
1316 static int fb_resume(struct platform_device *dev)
1317 {
1318 struct fb_info *info = platform_get_drvdata(dev);
1319 struct da8xx_fb_par *par = info->par;
1320
1321 console_lock();
1322 if (par->panel_power_ctrl)
1323 par->panel_power_ctrl(1);
1324
1325 clk_enable(par->lcdc_clk);
1326 lcd_enable_raster();
1327 fb_set_suspend(info, 0);
1328 console_unlock();
1329
1330 return 0;
1331 }
1332 #else
1333 #define fb_suspend NULL
1334 #define fb_resume NULL
1335 #endif
1336
1337 static struct platform_driver da8xx_fb_driver = {
1338 .probe = fb_probe,
1339 .remove = __devexit_p(fb_remove),
1340 .suspend = fb_suspend,
1341 .resume = fb_resume,
1342 .driver = {
1343 .name = DRIVER_NAME,
1344 .owner = THIS_MODULE,
1345 },
1346 };
1347
1348 static int __init da8xx_fb_init(void)
1349 {
1350 return platform_driver_register(&da8xx_fb_driver);
1351 }
1352
1353 static void __exit da8xx_fb_cleanup(void)
1354 {
1355 platform_driver_unregister(&da8xx_fb_driver);
1356 }
1357
1358 module_init(da8xx_fb_init);
1359 module_exit(da8xx_fb_cleanup);
1360
1361 MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx");
1362 MODULE_AUTHOR("Texas Instruments");
1363 MODULE_LICENSE("GPL");