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ondemand: Solve a big performance issue by counting IOWAIT time as busy
[linux/fpc-iii.git] / drivers / video / da8xx-fb.c
blob8d244ba0f6019689293bb7929a60ed065de6fdca
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 /* LCD Status Register */
39 #define LCD_END_OF_FRAME0 BIT(8)
40 #define LCD_FIFO_UNDERFLOW BIT(5)
41 #define LCD_SYNC_LOST BIT(2)
42
43 /* LCD DMA Control Register */
44 #define LCD_DMA_BURST_SIZE(x) ((x) << 4)
45 #define LCD_DMA_BURST_1 0x0
46 #define LCD_DMA_BURST_2 0x1
47 #define LCD_DMA_BURST_4 0x2
48 #define LCD_DMA_BURST_8 0x3
49 #define LCD_DMA_BURST_16 0x4
50 #define LCD_END_OF_FRAME_INT_ENA BIT(2)
51 #define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0)
52
53 /* LCD Control Register */
54 #define LCD_CLK_DIVISOR(x) ((x) << 8)
55 #define LCD_RASTER_MODE 0x01
56
57 /* LCD Raster Control Register */
58 #define LCD_PALETTE_LOAD_MODE(x) ((x) << 20)
59 #define PALETTE_AND_DATA 0x00
60 #define PALETTE_ONLY 0x01
61
62 #define LCD_MONO_8BIT_MODE BIT(9)
63 #define LCD_RASTER_ORDER BIT(8)
64 #define LCD_TFT_MODE BIT(7)
65 #define LCD_UNDERFLOW_INT_ENA BIT(6)
66 #define LCD_MONOCHROME_MODE BIT(1)
67 #define LCD_RASTER_ENABLE BIT(0)
68 #define LCD_TFT_ALT_ENABLE BIT(23)
69 #define LCD_STN_565_ENABLE BIT(24)
70
71 /* LCD Raster Timing 2 Register */
72 #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
73 #define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8)
74 #define LCD_SYNC_CTRL BIT(25)
75 #define LCD_SYNC_EDGE BIT(24)
76 #define LCD_INVERT_PIXEL_CLOCK BIT(22)
77 #define LCD_INVERT_LINE_CLOCK BIT(21)
78 #define LCD_INVERT_FRAME_CLOCK BIT(20)
79
80 /* LCD Block */
81 #define LCD_CTRL_REG 0x4
82 #define LCD_STAT_REG 0x8
83 #define LCD_RASTER_CTRL_REG 0x28
84 #define LCD_RASTER_TIMING_0_REG 0x2C
85 #define LCD_RASTER_TIMING_1_REG 0x30
86 #define LCD_RASTER_TIMING_2_REG 0x34
87 #define LCD_DMA_CTRL_REG 0x40
88 #define LCD_DMA_FRM_BUF_BASE_ADDR_0_REG 0x44
89 #define LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG 0x48
90
91 #define WSI_TIMEOUT 50
92 #define PALETTE_SIZE 256
93 #define LEFT_MARGIN 64
94 #define RIGHT_MARGIN 64
95 #define UPPER_MARGIN 32
96 #define LOWER_MARGIN 32
97
98 static resource_size_t da8xx_fb_reg_base;
99 static struct resource *lcdc_regs;
100
101 static inline unsigned int lcdc_read(unsigned int addr)
102 {
103 return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr));
104 }
105
106 static inline void lcdc_write(unsigned int val, unsigned int addr)
107 {
108 __raw_writel(val, da8xx_fb_reg_base + (addr));
109 }
110
111 struct da8xx_fb_par {
112 resource_size_t p_palette_base;
113 unsigned char *v_palette_base;
114 struct clk *lcdc_clk;
115 int irq;
116 unsigned short pseudo_palette[16];
117 unsigned int databuf_sz;
118 unsigned int palette_sz;
119 unsigned int pxl_clk;
120 int blank;
121 #ifdef CONFIG_CPU_FREQ
122 struct notifier_block freq_transition;
123 #endif
124 void (*panel_power_ctrl)(int);
125 };
126
127 /* Variable Screen Information */
128 static struct fb_var_screeninfo da8xx_fb_var __devinitdata = {
129 .xoffset = 0,
130 .yoffset = 0,
131 .transp = {0, 0, 0},
132 .nonstd = 0,
133 .activate = 0,
134 .height = -1,
135 .width = -1,
136 .pixclock = 46666, /* 46us - AUO display */
137 .accel_flags = 0,
138 .left_margin = LEFT_MARGIN,
139 .right_margin = RIGHT_MARGIN,
140 .upper_margin = UPPER_MARGIN,
141 .lower_margin = LOWER_MARGIN,
142 .sync = 0,
143 .vmode = FB_VMODE_NONINTERLACED
144 };
145
146 static struct fb_fix_screeninfo da8xx_fb_fix __devinitdata = {
147 .id = "DA8xx FB Drv",
148 .type = FB_TYPE_PACKED_PIXELS,
149 .type_aux = 0,
150 .visual = FB_VISUAL_PSEUDOCOLOR,
151 .xpanstep = 1,
152 .ypanstep = 1,
153 .ywrapstep = 1,
154 .accel = FB_ACCEL_NONE
155 };
156
157 struct da8xx_panel {
158 const char name[25]; /* Full name <vendor>_<model> */
159 unsigned short width;
160 unsigned short height;
161 int hfp; /* Horizontal front porch */
162 int hbp; /* Horizontal back porch */
163 int hsw; /* Horizontal Sync Pulse Width */
164 int vfp; /* Vertical front porch */
165 int vbp; /* Vertical back porch */
166 int vsw; /* Vertical Sync Pulse Width */
167 unsigned int pxl_clk; /* Pixel clock */
168 unsigned char invert_pxl_clk; /* Invert Pixel clock */
169 };
170
171 static struct da8xx_panel known_lcd_panels[] = {
172 /* Sharp LCD035Q3DG01 */
173 [0] = {
174 .name = "Sharp_LCD035Q3DG01",
175 .width = 320,
176 .height = 240,
177 .hfp = 8,
178 .hbp = 6,
179 .hsw = 0,
180 .vfp = 2,
181 .vbp = 2,
182 .vsw = 0,
183 .pxl_clk = 4608000,
184 .invert_pxl_clk = 1,
185 },
186 /* Sharp LK043T1DG01 */
187 [1] = {
188 .name = "Sharp_LK043T1DG01",
189 .width = 480,
190 .height = 272,
191 .hfp = 2,
192 .hbp = 2,
193 .hsw = 41,
194 .vfp = 2,
195 .vbp = 2,
196 .vsw = 10,
197 .pxl_clk = 7833600,
198 .invert_pxl_clk = 0,
199 },
200 };
201
202 /* Enable the Raster Engine of the LCD Controller */
203 static inline void lcd_enable_raster(void)
204 {
205 u32 reg;
206
207 reg = lcdc_read(LCD_RASTER_CTRL_REG);
208 if (!(reg & LCD_RASTER_ENABLE))
209 lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
210 }
211
212 /* Disable the Raster Engine of the LCD Controller */
213 static inline void lcd_disable_raster(void)
214 {
215 u32 reg;
216
217 reg = lcdc_read(LCD_RASTER_CTRL_REG);
218 if (reg & LCD_RASTER_ENABLE)
219 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
220 }
221
222 static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
223 {
224 u32 tmp = par->p_palette_base + par->databuf_sz - 4;
225 u32 reg;
226
227 /* Update the databuf in the hw. */
228 lcdc_write(par->p_palette_base, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
229 lcdc_write(tmp, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
230
231 /* Start the DMA. */
232 reg = lcdc_read(LCD_RASTER_CTRL_REG);
233 reg &= ~(3 << 20);
234 if (load_mode == LOAD_DATA)
235 reg |= LCD_PALETTE_LOAD_MODE(PALETTE_AND_DATA);
236 else if (load_mode == LOAD_PALETTE)
237 reg |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
238
239 lcdc_write(reg, LCD_RASTER_CTRL_REG);
240 }
241
242 /* Configure the Burst Size of DMA */
243 static int lcd_cfg_dma(int burst_size)
244 {
245 u32 reg;
246
247 reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001;
248 switch (burst_size) {
249 case 1:
250 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
251 break;
252 case 2:
253 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
254 break;
255 case 4:
256 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
257 break;
258 case 8:
259 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
260 break;
261 case 16:
262 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
263 break;
264 default:
265 return -EINVAL;
266 }
267 lcdc_write(reg, LCD_DMA_CTRL_REG);
268
269 return 0;
270 }
271
272 static void lcd_cfg_ac_bias(int period, int transitions_per_int)
273 {
274 u32 reg;
275
276 /* Set the AC Bias Period and Number of Transisitons per Interrupt */
277 reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000;
278 reg |= LCD_AC_BIAS_FREQUENCY(period) |
279 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
280 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
281 }
282
283 static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
284 int front_porch)
285 {
286 u32 reg;
287
288 reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf;
289 reg |= ((back_porch & 0xff) << 24)
290 | ((front_porch & 0xff) << 16)
291 | ((pulse_width & 0x3f) << 10);
292 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
293 }
294
295 static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
296 int front_porch)
297 {
298 u32 reg;
299
300 reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
301 reg |= ((back_porch & 0xff) << 24)
302 | ((front_porch & 0xff) << 16)
303 | ((pulse_width & 0x3f) << 10);
304 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
305 }
306
307 static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
308 {
309 u32 reg;
310
311 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE |
312 LCD_MONO_8BIT_MODE |
313 LCD_MONOCHROME_MODE);
314
315 switch (cfg->p_disp_panel->panel_shade) {
316 case MONOCHROME:
317 reg |= LCD_MONOCHROME_MODE;
318 if (cfg->mono_8bit_mode)
319 reg |= LCD_MONO_8BIT_MODE;
320 break;
321 case COLOR_ACTIVE:
322 reg |= LCD_TFT_MODE;
323 if (cfg->tft_alt_mode)
324 reg |= LCD_TFT_ALT_ENABLE;
325 break;
326
327 case COLOR_PASSIVE:
328 if (cfg->stn_565_mode)
329 reg |= LCD_STN_565_ENABLE;
330 break;
331
332 default:
333 return -EINVAL;
334 }
335
336 /* enable additional interrupts here */
337 reg |= LCD_UNDERFLOW_INT_ENA;
338
339 lcdc_write(reg, LCD_RASTER_CTRL_REG);
340
341 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
342
343 if (cfg->sync_ctrl)
344 reg |= LCD_SYNC_CTRL;
345 else
346 reg &= ~LCD_SYNC_CTRL;
347
348 if (cfg->sync_edge)
349 reg |= LCD_SYNC_EDGE;
350 else
351 reg &= ~LCD_SYNC_EDGE;
352
353 if (cfg->invert_line_clock)
354 reg |= LCD_INVERT_LINE_CLOCK;
355 else
356 reg &= ~LCD_INVERT_LINE_CLOCK;
357
358 if (cfg->invert_frm_clock)
359 reg |= LCD_INVERT_FRAME_CLOCK;
360 else
361 reg &= ~LCD_INVERT_FRAME_CLOCK;
362
363 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
364
365 return 0;
366 }
367
368 static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
369 u32 bpp, u32 raster_order)
370 {
371 u32 bpl, reg;
372
373 /* Disable Dual Frame Buffer. */
374 reg = lcdc_read(LCD_DMA_CTRL_REG);
375 lcdc_write(reg & ~LCD_DUAL_FRAME_BUFFER_ENABLE,
376 LCD_DMA_CTRL_REG);
377 /* Set the Panel Width */
378 /* Pixels per line = (PPL + 1)*16 */
379 /*0x3F in bits 4..9 gives max horisontal resolution = 1024 pixels*/
380 width &= 0x3f0;
381 reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
382 reg &= 0xfffffc00;
383 reg |= ((width >> 4) - 1) << 4;
384 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
385
386 /* Set the Panel Height */
387 reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
388 reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
389 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
390
391 /* Set the Raster Order of the Frame Buffer */
392 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
393 if (raster_order)
394 reg |= LCD_RASTER_ORDER;
395 lcdc_write(reg, LCD_RASTER_CTRL_REG);
396
397 switch (bpp) {
398 case 1:
399 case 2:
400 case 4:
401 case 16:
402 par->palette_sz = 16 * 2;
403 break;
404
405 case 8:
406 par->palette_sz = 256 * 2;
407 break;
408
409 default:
410 return -EINVAL;
411 }
412
413 bpl = width * bpp / 8;
414 par->databuf_sz = height * bpl + par->palette_sz;
415
416 return 0;
417 }
418
419 static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
420 unsigned blue, unsigned transp,
421 struct fb_info *info)
422 {
423 struct da8xx_fb_par *par = info->par;
424 unsigned short *palette = (unsigned short *)par->v_palette_base;
425 u_short pal;
426
427 if (regno > 255)
428 return 1;
429
430 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
431 return 1;
432
433 if (info->var.bits_per_pixel == 8) {
434 red >>= 4;
435 green >>= 8;
436 blue >>= 12;
437
438 pal = (red & 0x0f00);
439 pal |= (green & 0x00f0);
440 pal |= (blue & 0x000f);
441
442 palette[regno] = pal;
443
444 } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
445 red >>= (16 - info->var.red.length);
446 red <<= info->var.red.offset;
447
448 green >>= (16 - info->var.green.length);
449 green <<= info->var.green.offset;
450
451 blue >>= (16 - info->var.blue.length);
452 blue <<= info->var.blue.offset;
453
454 par->pseudo_palette[regno] = red | green | blue;
455
456 palette[0] = 0x4000;
457 }
458
459 return 0;
460 }
461
462 static void lcd_reset(struct da8xx_fb_par *par)
463 {
464 /* Disable the Raster if previously Enabled */
465 lcd_disable_raster();
466
467 /* DMA has to be disabled */
468 lcdc_write(0, LCD_DMA_CTRL_REG);
469 lcdc_write(0, LCD_RASTER_CTRL_REG);
470 }
471
472 static void lcd_calc_clk_divider(struct da8xx_fb_par *par)
473 {
474 unsigned int lcd_clk, div;
475
476 lcd_clk = clk_get_rate(par->lcdc_clk);
477 div = lcd_clk / par->pxl_clk;
478
479 /* Configure the LCD clock divisor. */
480 lcdc_write(LCD_CLK_DIVISOR(div) |
481 (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
482 }
483
484 static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
485 struct da8xx_panel *panel)
486 {
487 u32 bpp;
488 int ret = 0;
489
490 lcd_reset(par);
491
492 /* Calculate the divider */
493 lcd_calc_clk_divider(par);
494
495 if (panel->invert_pxl_clk)
496 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
497 LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
498 else
499 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
500 ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
501
502 /* Configure the DMA burst size. */
503 ret = lcd_cfg_dma(cfg->dma_burst_sz);
504 if (ret < 0)
505 return ret;
506
507 /* Configure the AC bias properties. */
508 lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
509
510 /* Configure the vertical and horizontal sync properties. */
511 lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp);
512 lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp);
513
514 /* Configure for disply */
515 ret = lcd_cfg_display(cfg);
516 if (ret < 0)
517 return ret;
518
519 if (QVGA != cfg->p_disp_panel->panel_type)
520 return -EINVAL;
521
522 if (cfg->bpp <= cfg->p_disp_panel->max_bpp &&
523 cfg->bpp >= cfg->p_disp_panel->min_bpp)
524 bpp = cfg->bpp;
525 else
526 bpp = cfg->p_disp_panel->max_bpp;
527 if (bpp == 12)
528 bpp = 16;
529 ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width,
530 (unsigned int)panel->height, bpp,
531 cfg->raster_order);
532 if (ret < 0)
533 return ret;
534
535 /* Configure FDD */
536 lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) |
537 (cfg->fdd << 12), LCD_RASTER_CTRL_REG);
538
539 return 0;
540 }
541
542 static irqreturn_t lcdc_irq_handler(int irq, void *arg)
543 {
544 u32 stat = lcdc_read(LCD_STAT_REG);
545
546 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
547 lcd_disable_raster();
548 lcdc_write(stat, LCD_STAT_REG);
549 lcd_enable_raster();
550 } else
551 lcdc_write(stat, LCD_STAT_REG);
552
553 return IRQ_HANDLED;
554 }
555
556 static int fb_check_var(struct fb_var_screeninfo *var,
557 struct fb_info *info)
558 {
559 int err = 0;
560
561 switch (var->bits_per_pixel) {
562 case 1:
563 case 8:
564 var->red.offset = 0;
565 var->red.length = 8;
566 var->green.offset = 0;
567 var->green.length = 8;
568 var->blue.offset = 0;
569 var->blue.length = 8;
570 var->transp.offset = 0;
571 var->transp.length = 0;
572 break;
573 case 4:
574 var->red.offset = 0;
575 var->red.length = 4;
576 var->green.offset = 0;
577 var->green.length = 4;
578 var->blue.offset = 0;
579 var->blue.length = 4;
580 var->transp.offset = 0;
581 var->transp.length = 0;
582 break;
583 case 16: /* RGB 565 */
584 var->red.offset = 11;
585 var->red.length = 5;
586 var->green.offset = 5;
587 var->green.length = 6;
588 var->blue.offset = 0;
589 var->blue.length = 5;
590 var->transp.offset = 0;
591 var->transp.length = 0;
592 break;
593 default:
594 err = -EINVAL;
595 }
596
597 var->red.msb_right = 0;
598 var->green.msb_right = 0;
599 var->blue.msb_right = 0;
600 var->transp.msb_right = 0;
601 return err;
602 }
603
604 #ifdef CONFIG_CPU_FREQ
605 static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
606 unsigned long val, void *data)
607 {
608 struct da8xx_fb_par *par;
609
610 par = container_of(nb, struct da8xx_fb_par, freq_transition);
611 if (val == CPUFREQ_PRECHANGE) {
612 lcd_disable_raster();
613 } else if (val == CPUFREQ_POSTCHANGE) {
614 lcd_calc_clk_divider(par);
615 lcd_enable_raster();
616 }
617
618 return 0;
619 }
620
621 static inline int lcd_da8xx_cpufreq_register(struct da8xx_fb_par *par)
622 {
623 par->freq_transition.notifier_call = lcd_da8xx_cpufreq_transition;
624
625 return cpufreq_register_notifier(&par->freq_transition,
626 CPUFREQ_TRANSITION_NOTIFIER);
627 }
628
629 static inline void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par)
630 {
631 cpufreq_unregister_notifier(&par->freq_transition,
632 CPUFREQ_TRANSITION_NOTIFIER);
633 }
634 #endif
635
636 static int __devexit fb_remove(struct platform_device *dev)
637 {
638 struct fb_info *info = dev_get_drvdata(&dev->dev);
639
640 if (info) {
641 struct da8xx_fb_par *par = info->par;
642
643 #ifdef CONFIG_CPU_FREQ
644 lcd_da8xx_cpufreq_deregister(par);
645 #endif
646 if (par->panel_power_ctrl)
647 par->panel_power_ctrl(0);
648
649 lcd_disable_raster();
650 lcdc_write(0, LCD_RASTER_CTRL_REG);
651
652 /* disable DMA */
653 lcdc_write(0, LCD_DMA_CTRL_REG);
654
655 unregister_framebuffer(info);
656 fb_dealloc_cmap(&info->cmap);
657 dma_free_coherent(NULL, par->databuf_sz + PAGE_SIZE,
658 info->screen_base - PAGE_SIZE,
659 info->fix.smem_start);
660 free_irq(par->irq, par);
661 clk_disable(par->lcdc_clk);
662 clk_put(par->lcdc_clk);
663 framebuffer_release(info);
664 iounmap((void __iomem *)da8xx_fb_reg_base);
665 release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
666
667 }
668 return 0;
669 }
670
671 static int fb_ioctl(struct fb_info *info, unsigned int cmd,
672 unsigned long arg)
673 {
674 struct lcd_sync_arg sync_arg;
675
676 switch (cmd) {
677 case FBIOGET_CONTRAST:
678 case FBIOPUT_CONTRAST:
679 case FBIGET_BRIGHTNESS:
680 case FBIPUT_BRIGHTNESS:
681 case FBIGET_COLOR:
682 case FBIPUT_COLOR:
683 return -ENOTTY;
684 case FBIPUT_HSYNC:
685 if (copy_from_user(&sync_arg, (char *)arg,
686 sizeof(struct lcd_sync_arg)))
687 return -EFAULT;
688 lcd_cfg_horizontal_sync(sync_arg.back_porch,
689 sync_arg.pulse_width,
690 sync_arg.front_porch);
691 break;
692 case FBIPUT_VSYNC:
693 if (copy_from_user(&sync_arg, (char *)arg,
694 sizeof(struct lcd_sync_arg)))
695 return -EFAULT;
696 lcd_cfg_vertical_sync(sync_arg.back_porch,
697 sync_arg.pulse_width,
698 sync_arg.front_porch);
699 break;
700 default:
701 return -EINVAL;
702 }
703 return 0;
704 }
705
706 static int cfb_blank(int blank, struct fb_info *info)
707 {
708 struct da8xx_fb_par *par = info->par;
709 int ret = 0;
710
711 if (par->blank == blank)
712 return 0;
713
714 par->blank = blank;
715 switch (blank) {
716 case FB_BLANK_UNBLANK:
717 if (par->panel_power_ctrl)
718 par->panel_power_ctrl(1);
719
720 lcd_enable_raster();
721 break;
722 case FB_BLANK_POWERDOWN:
723 if (par->panel_power_ctrl)
724 par->panel_power_ctrl(0);
725
726 lcd_disable_raster();
727 break;
728 default:
729 ret = -EINVAL;
730 }
731
732 return ret;
733 }
734
735 static struct fb_ops da8xx_fb_ops = {
736 .owner = THIS_MODULE,
737 .fb_check_var = fb_check_var,
738 .fb_setcolreg = fb_setcolreg,
739 .fb_ioctl = fb_ioctl,
740 .fb_fillrect = cfb_fillrect,
741 .fb_copyarea = cfb_copyarea,
742 .fb_imageblit = cfb_imageblit,
743 .fb_blank = cfb_blank,
744 };
745
746 static int __init fb_probe(struct platform_device *device)
747 {
748 struct da8xx_lcdc_platform_data *fb_pdata =
749 device->dev.platform_data;
750 struct lcd_ctrl_config *lcd_cfg;
751 struct da8xx_panel *lcdc_info;
752 struct fb_info *da8xx_fb_info;
753 struct clk *fb_clk = NULL;
754 struct da8xx_fb_par *par;
755 resource_size_t len;
756 int ret, i;
757
758 if (fb_pdata == NULL) {
759 dev_err(&device->dev, "Can not get platform data\n");
760 return -ENOENT;
761 }
762
763 lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0);
764 if (!lcdc_regs) {
765 dev_err(&device->dev,
766 "Can not get memory resource for LCD controller\n");
767 return -ENOENT;
768 }
769
770 len = resource_size(lcdc_regs);
771
772 lcdc_regs = request_mem_region(lcdc_regs->start, len, lcdc_regs->name);
773 if (!lcdc_regs)
774 return -EBUSY;
775
776 da8xx_fb_reg_base = (resource_size_t)ioremap(lcdc_regs->start, len);
777 if (!da8xx_fb_reg_base) {
778 ret = -EBUSY;
779 goto err_request_mem;
780 }
781
782 fb_clk = clk_get(&device->dev, NULL);
783 if (IS_ERR(fb_clk)) {
784 dev_err(&device->dev, "Can not get device clock\n");
785 ret = -ENODEV;
786 goto err_ioremap;
787 }
788 ret = clk_enable(fb_clk);
789 if (ret)
790 goto err_clk_put;
791
792 for (i = 0, lcdc_info = known_lcd_panels;
793 i < ARRAY_SIZE(known_lcd_panels);
794 i++, lcdc_info++) {
795 if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
796 break;
797 }
798
799 if (i == ARRAY_SIZE(known_lcd_panels)) {
800 dev_err(&device->dev, "GLCD: No valid panel found\n");
801 ret = -ENODEV;
802 goto err_clk_disable;
803 } else
804 dev_info(&device->dev, "GLCD: Found %s panel\n",
805 fb_pdata->type);
806
807 lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
808
809 da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par),
810 &device->dev);
811 if (!da8xx_fb_info) {
812 dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
813 ret = -ENOMEM;
814 goto err_clk_disable;
815 }
816
817 par = da8xx_fb_info->par;
818 par->lcdc_clk = fb_clk;
819 par->pxl_clk = lcdc_info->pxl_clk;
820 if (fb_pdata->panel_power_ctrl) {
821 par->panel_power_ctrl = fb_pdata->panel_power_ctrl;
822 par->panel_power_ctrl(1);
823 }
824
825 if (lcd_init(par, lcd_cfg, lcdc_info) < 0) {
826 dev_err(&device->dev, "lcd_init failed\n");
827 ret = -EFAULT;
828 goto err_release_fb;
829 }
830
831 /* allocate frame buffer */
832 da8xx_fb_info->screen_base = dma_alloc_coherent(NULL,
833 par->databuf_sz + PAGE_SIZE,
834 (resource_size_t *)
835 &da8xx_fb_info->fix.smem_start,
836 GFP_KERNEL | GFP_DMA);
837
838 if (!da8xx_fb_info->screen_base) {
839 dev_err(&device->dev,
840 "GLCD: kmalloc for frame buffer failed\n");
841 ret = -EINVAL;
842 goto err_release_fb;
843 }
844
845 /* move palette base pointer by (PAGE_SIZE - palette_sz) bytes */
846 par->v_palette_base = da8xx_fb_info->screen_base +
847 (PAGE_SIZE - par->palette_sz);
848 par->p_palette_base = da8xx_fb_info->fix.smem_start +
849 (PAGE_SIZE - par->palette_sz);
850
851 /* the rest of the frame buffer is pixel data */
852 da8xx_fb_info->screen_base = par->v_palette_base + par->palette_sz;
853 da8xx_fb_fix.smem_start = par->p_palette_base + par->palette_sz;
854 da8xx_fb_fix.smem_len = par->databuf_sz - par->palette_sz;
855 da8xx_fb_fix.line_length = (lcdc_info->width * lcd_cfg->bpp) / 8;
856
857 par->irq = platform_get_irq(device, 0);
858 if (par->irq < 0) {
859 ret = -ENOENT;
860 goto err_release_fb_mem;
861 }
862
863 ret = request_irq(par->irq, lcdc_irq_handler, 0, DRIVER_NAME, par);
864 if (ret)
865 goto err_release_fb_mem;
866
867 /* Initialize par */
868 da8xx_fb_info->var.bits_per_pixel = lcd_cfg->bpp;
869
870 da8xx_fb_var.xres = lcdc_info->width;
871 da8xx_fb_var.xres_virtual = lcdc_info->width;
872
873 da8xx_fb_var.yres = lcdc_info->height;
874 da8xx_fb_var.yres_virtual = lcdc_info->height;
875
876 da8xx_fb_var.grayscale =
877 lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0;
878 da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp;
879
880 da8xx_fb_var.hsync_len = lcdc_info->hsw;
881 da8xx_fb_var.vsync_len = lcdc_info->vsw;
882
883 /* Initialize fbinfo */
884 da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
885 da8xx_fb_info->fix = da8xx_fb_fix;
886 da8xx_fb_info->var = da8xx_fb_var;
887 da8xx_fb_info->fbops = &da8xx_fb_ops;
888 da8xx_fb_info->pseudo_palette = par->pseudo_palette;
889 da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
890 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
891
892 ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0);
893 if (ret)
894 goto err_free_irq;
895
896 /* First palette_sz byte of the frame buffer is the palette */
897 da8xx_fb_info->cmap.len = par->palette_sz;
898
899 /* Flush the buffer to the screen. */
900 lcd_blit(LOAD_DATA, par);
901
902 /* initialize var_screeninfo */
903 da8xx_fb_var.activate = FB_ACTIVATE_FORCE;
904 fb_set_var(da8xx_fb_info, &da8xx_fb_var);
905
906 dev_set_drvdata(&device->dev, da8xx_fb_info);
907 /* Register the Frame Buffer */
908 if (register_framebuffer(da8xx_fb_info) < 0) {
909 dev_err(&device->dev,
910 "GLCD: Frame Buffer Registration Failed!\n");
911 ret = -EINVAL;
912 goto err_dealloc_cmap;
913 }
914
915 #ifdef CONFIG_CPU_FREQ
916 ret = lcd_da8xx_cpufreq_register(par);
917 if (ret) {
918 dev_err(&device->dev, "failed to register cpufreq\n");
919 goto err_cpu_freq;
920 }
921 #endif
922
923 /* enable raster engine */
924 lcd_enable_raster();
925
926 return 0;
927
928 #ifdef CONFIG_CPU_FREQ
929 err_cpu_freq:
930 unregister_framebuffer(da8xx_fb_info);
931 #endif
932
933 err_dealloc_cmap:
934 fb_dealloc_cmap(&da8xx_fb_info->cmap);
935
936 err_free_irq:
937 free_irq(par->irq, par);
938
939 err_release_fb_mem:
940 dma_free_coherent(NULL, par->databuf_sz + PAGE_SIZE,
941 da8xx_fb_info->screen_base - PAGE_SIZE,
942 da8xx_fb_info->fix.smem_start);
943
944 err_release_fb:
945 framebuffer_release(da8xx_fb_info);
946
947 err_clk_disable:
948 clk_disable(fb_clk);
949
950 err_clk_put:
951 clk_put(fb_clk);
952
953 err_ioremap:
954 iounmap((void __iomem *)da8xx_fb_reg_base);
955
956 err_request_mem:
957 release_mem_region(lcdc_regs->start, len);
958
959 return ret;
960 }
961
962 #ifdef CONFIG_PM
963 static int fb_suspend(struct platform_device *dev, pm_message_t state)
964 {
965 struct fb_info *info = platform_get_drvdata(dev);
966 struct da8xx_fb_par *par = info->par;
967
968 acquire_console_sem();
969 if (par->panel_power_ctrl)
970 par->panel_power_ctrl(0);
971
972 fb_set_suspend(info, 1);
973 lcd_disable_raster();
974 clk_disable(par->lcdc_clk);
975 release_console_sem();
976
977 return 0;
978 }
979 static int fb_resume(struct platform_device *dev)
980 {
981 struct fb_info *info = platform_get_drvdata(dev);
982 struct da8xx_fb_par *par = info->par;
983
984 acquire_console_sem();
985 if (par->panel_power_ctrl)
986 par->panel_power_ctrl(1);
987
988 clk_enable(par->lcdc_clk);
989 lcd_enable_raster();
990 fb_set_suspend(info, 0);
991 release_console_sem();
992
993 return 0;
994 }
995 #else
996 #define fb_suspend NULL
997 #define fb_resume NULL
998 #endif
999
1000 static struct platform_driver da8xx_fb_driver = {
1001 .probe = fb_probe,
1002 .remove = fb_remove,
1003 .suspend = fb_suspend,
1004 .resume = fb_resume,
1005 .driver = {
1006 .name = DRIVER_NAME,
1007 .owner = THIS_MODULE,
1008 },
1009 };
1010
1011 static int __init da8xx_fb_init(void)
1012 {
1013 return platform_driver_register(&da8xx_fb_driver);
1014 }
1015
1016 static void __exit da8xx_fb_cleanup(void)
1017 {
1018 platform_driver_unregister(&da8xx_fb_driver);
1019 }
1020
1021 module_init(da8xx_fb_init);
1022 module_exit(da8xx_fb_cleanup);
1023
1024 MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx");
1025 MODULE_AUTHOR("Texas Instruments");
1026 MODULE_LICENSE("GPL");
Linux with added FPC-III support