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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / video / da8xx-fb.c
blob369a5b3ac6493b578425a7435ad45b4c2bc3759b
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 <video/da8xx-fb.h>
34
35 #define DRIVER_NAME "da8xx_lcdc"
36
37 /* LCD Status Register */
38 #define LCD_END_OF_FRAME0 BIT(8)
39 #define LCD_FIFO_UNDERFLOW BIT(5)
40 #define LCD_SYNC_LOST BIT(2)
41
42 /* LCD DMA Control Register */
43 #define LCD_DMA_BURST_SIZE(x) ((x) << 4)
44 #define LCD_DMA_BURST_1 0x0
45 #define LCD_DMA_BURST_2 0x1
46 #define LCD_DMA_BURST_4 0x2
47 #define LCD_DMA_BURST_8 0x3
48 #define LCD_DMA_BURST_16 0x4
49 #define LCD_END_OF_FRAME_INT_ENA BIT(2)
50 #define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0)
51
52 /* LCD Control Register */
53 #define LCD_CLK_DIVISOR(x) ((x) << 8)
54 #define LCD_RASTER_MODE 0x01
55
56 /* LCD Raster Control Register */
57 #define LCD_PALETTE_LOAD_MODE(x) ((x) << 20)
58 #define PALETTE_AND_DATA 0x00
59 #define PALETTE_ONLY 0x01
60
61 #define LCD_MONO_8BIT_MODE BIT(9)
62 #define LCD_RASTER_ORDER BIT(8)
63 #define LCD_TFT_MODE BIT(7)
64 #define LCD_UNDERFLOW_INT_ENA BIT(6)
65 #define LCD_MONOCHROME_MODE BIT(1)
66 #define LCD_RASTER_ENABLE BIT(0)
67 #define LCD_TFT_ALT_ENABLE BIT(23)
68 #define LCD_STN_565_ENABLE BIT(24)
69
70 /* LCD Raster Timing 2 Register */
71 #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
72 #define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8)
73 #define LCD_SYNC_CTRL BIT(25)
74 #define LCD_SYNC_EDGE BIT(24)
75 #define LCD_INVERT_PIXEL_CLOCK BIT(22)
76 #define LCD_INVERT_LINE_CLOCK BIT(21)
77 #define LCD_INVERT_FRAME_CLOCK BIT(20)
78
79 /* LCD Block */
80 #define LCD_CTRL_REG 0x4
81 #define LCD_STAT_REG 0x8
82 #define LCD_RASTER_CTRL_REG 0x28
83 #define LCD_RASTER_TIMING_0_REG 0x2C
84 #define LCD_RASTER_TIMING_1_REG 0x30
85 #define LCD_RASTER_TIMING_2_REG 0x34
86 #define LCD_DMA_CTRL_REG 0x40
87 #define LCD_DMA_FRM_BUF_BASE_ADDR_0_REG 0x44
88 #define LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG 0x48
89
90 #define WSI_TIMEOUT 50
91 #define PALETTE_SIZE 256
92 #define LEFT_MARGIN 64
93 #define RIGHT_MARGIN 64
94 #define UPPER_MARGIN 32
95 #define LOWER_MARGIN 32
96
97 static resource_size_t da8xx_fb_reg_base;
98 static struct resource *lcdc_regs;
99
100 static inline unsigned int lcdc_read(unsigned int addr)
101 {
102 return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr));
103 }
104
105 static inline void lcdc_write(unsigned int val, unsigned int addr)
106 {
107 __raw_writel(val, da8xx_fb_reg_base + (addr));
108 }
109
110 struct da8xx_fb_par {
111 resource_size_t p_palette_base;
112 unsigned char *v_palette_base;
113 struct clk *lcdc_clk;
114 int irq;
115 unsigned short pseudo_palette[16];
116 unsigned int databuf_sz;
117 unsigned int palette_sz;
118 unsigned int pxl_clk;
119 int blank;
120 #ifdef CONFIG_CPU_FREQ
121 struct notifier_block freq_transition;
122 #endif
123 void (*panel_power_ctrl)(int);
124 };
125
126 /* Variable Screen Information */
127 static struct fb_var_screeninfo da8xx_fb_var __devinitdata = {
128 .xoffset = 0,
129 .yoffset = 0,
130 .transp = {0, 0, 0},
131 .nonstd = 0,
132 .activate = 0,
133 .height = -1,
134 .width = -1,
135 .pixclock = 46666, /* 46us - AUO display */
136 .accel_flags = 0,
137 .left_margin = LEFT_MARGIN,
138 .right_margin = RIGHT_MARGIN,
139 .upper_margin = UPPER_MARGIN,
140 .lower_margin = LOWER_MARGIN,
141 .sync = 0,
142 .vmode = FB_VMODE_NONINTERLACED
143 };
144
145 static struct fb_fix_screeninfo da8xx_fb_fix __devinitdata = {
146 .id = "DA8xx FB Drv",
147 .type = FB_TYPE_PACKED_PIXELS,
148 .type_aux = 0,
149 .visual = FB_VISUAL_PSEUDOCOLOR,
150 .xpanstep = 1,
151 .ypanstep = 1,
152 .ywrapstep = 1,
153 .accel = FB_ACCEL_NONE
154 };
155
156 struct da8xx_panel {
157 const char name[25]; /* Full name <vendor>_<model> */
158 unsigned short width;
159 unsigned short height;
160 int hfp; /* Horizontal front porch */
161 int hbp; /* Horizontal back porch */
162 int hsw; /* Horizontal Sync Pulse Width */
163 int vfp; /* Vertical front porch */
164 int vbp; /* Vertical back porch */
165 int vsw; /* Vertical Sync Pulse Width */
166 unsigned int pxl_clk; /* Pixel clock */
167 unsigned char invert_pxl_clk; /* Invert Pixel clock */
168 };
169
170 static struct da8xx_panel known_lcd_panels[] = {
171 /* Sharp LCD035Q3DG01 */
172 [0] = {
173 .name = "Sharp_LCD035Q3DG01",
174 .width = 320,
175 .height = 240,
176 .hfp = 8,
177 .hbp = 6,
178 .hsw = 0,
179 .vfp = 2,
180 .vbp = 2,
181 .vsw = 0,
182 .pxl_clk = 4608000,
183 .invert_pxl_clk = 1,
184 },
185 /* Sharp LK043T1DG01 */
186 [1] = {
187 .name = "Sharp_LK043T1DG01",
188 .width = 480,
189 .height = 272,
190 .hfp = 2,
191 .hbp = 2,
192 .hsw = 41,
193 .vfp = 2,
194 .vbp = 2,
195 .vsw = 10,
196 .pxl_clk = 7833600,
197 .invert_pxl_clk = 0,
198 },
199 };
200
201 /* Enable the Raster Engine of the LCD Controller */
202 static inline void lcd_enable_raster(void)
203 {
204 u32 reg;
205
206 reg = lcdc_read(LCD_RASTER_CTRL_REG);
207 if (!(reg & LCD_RASTER_ENABLE))
208 lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
209 }
210
211 /* Disable the Raster Engine of the LCD Controller */
212 static inline void lcd_disable_raster(void)
213 {
214 u32 reg;
215
216 reg = lcdc_read(LCD_RASTER_CTRL_REG);
217 if (reg & LCD_RASTER_ENABLE)
218 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
219 }
220
221 static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
222 {
223 u32 tmp = par->p_palette_base + par->databuf_sz - 4;
224 u32 reg;
225
226 /* Update the databuf in the hw. */
227 lcdc_write(par->p_palette_base, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
228 lcdc_write(tmp, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
229
230 /* Start the DMA. */
231 reg = lcdc_read(LCD_RASTER_CTRL_REG);
232 reg &= ~(3 << 20);
233 if (load_mode == LOAD_DATA)
234 reg |= LCD_PALETTE_LOAD_MODE(PALETTE_AND_DATA);
235 else if (load_mode == LOAD_PALETTE)
236 reg |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
237
238 lcdc_write(reg, LCD_RASTER_CTRL_REG);
239 }
240
241 /* Configure the Burst Size of DMA */
242 static int lcd_cfg_dma(int burst_size)
243 {
244 u32 reg;
245
246 reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001;
247 switch (burst_size) {
248 case 1:
249 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
250 break;
251 case 2:
252 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
253 break;
254 case 4:
255 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
256 break;
257 case 8:
258 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
259 break;
260 case 16:
261 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
262 break;
263 default:
264 return -EINVAL;
265 }
266 lcdc_write(reg, LCD_DMA_CTRL_REG);
267
268 return 0;
269 }
270
271 static void lcd_cfg_ac_bias(int period, int transitions_per_int)
272 {
273 u32 reg;
274
275 /* Set the AC Bias Period and Number of Transisitons per Interrupt */
276 reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000;
277 reg |= LCD_AC_BIAS_FREQUENCY(period) |
278 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
279 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
280 }
281
282 static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
283 int front_porch)
284 {
285 u32 reg;
286
287 reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf;
288 reg |= ((back_porch & 0xff) << 24)
289 | ((front_porch & 0xff) << 16)
290 | ((pulse_width & 0x3f) << 10);
291 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
292 }
293
294 static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
295 int front_porch)
296 {
297 u32 reg;
298
299 reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
300 reg |= ((back_porch & 0xff) << 24)
301 | ((front_porch & 0xff) << 16)
302 | ((pulse_width & 0x3f) << 10);
303 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
304 }
305
306 static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
307 {
308 u32 reg;
309
310 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE |
311 LCD_MONO_8BIT_MODE |
312 LCD_MONOCHROME_MODE);
313
314 switch (cfg->p_disp_panel->panel_shade) {
315 case MONOCHROME:
316 reg |= LCD_MONOCHROME_MODE;
317 if (cfg->mono_8bit_mode)
318 reg |= LCD_MONO_8BIT_MODE;
319 break;
320 case COLOR_ACTIVE:
321 reg |= LCD_TFT_MODE;
322 if (cfg->tft_alt_mode)
323 reg |= LCD_TFT_ALT_ENABLE;
324 break;
325
326 case COLOR_PASSIVE:
327 if (cfg->stn_565_mode)
328 reg |= LCD_STN_565_ENABLE;
329 break;
330
331 default:
332 return -EINVAL;
333 }
334
335 /* enable additional interrupts here */
336 reg |= LCD_UNDERFLOW_INT_ENA;
337
338 lcdc_write(reg, LCD_RASTER_CTRL_REG);
339
340 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
341
342 if (cfg->sync_ctrl)
343 reg |= LCD_SYNC_CTRL;
344 else
345 reg &= ~LCD_SYNC_CTRL;
346
347 if (cfg->sync_edge)
348 reg |= LCD_SYNC_EDGE;
349 else
350 reg &= ~LCD_SYNC_EDGE;
351
352 if (cfg->invert_line_clock)
353 reg |= LCD_INVERT_LINE_CLOCK;
354 else
355 reg &= ~LCD_INVERT_LINE_CLOCK;
356
357 if (cfg->invert_frm_clock)
358 reg |= LCD_INVERT_FRAME_CLOCK;
359 else
360 reg &= ~LCD_INVERT_FRAME_CLOCK;
361
362 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
363
364 return 0;
365 }
366
367 static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
368 u32 bpp, u32 raster_order)
369 {
370 u32 bpl, reg;
371
372 /* Disable Dual Frame Buffer. */
373 reg = lcdc_read(LCD_DMA_CTRL_REG);
374 lcdc_write(reg & ~LCD_DUAL_FRAME_BUFFER_ENABLE,
375 LCD_DMA_CTRL_REG);
376 /* Set the Panel Width */
377 /* Pixels per line = (PPL + 1)*16 */
378 /*0x3F in bits 4..9 gives max horisontal resolution = 1024 pixels*/
379 width &= 0x3f0;
380 reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
381 reg &= 0xfffffc00;
382 reg |= ((width >> 4) - 1) << 4;
383 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
384
385 /* Set the Panel Height */
386 reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
387 reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
388 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
389
390 /* Set the Raster Order of the Frame Buffer */
391 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
392 if (raster_order)
393 reg |= LCD_RASTER_ORDER;
394 lcdc_write(reg, LCD_RASTER_CTRL_REG);
395
396 switch (bpp) {
397 case 1:
398 case 2:
399 case 4:
400 case 16:
401 par->palette_sz = 16 * 2;
402 break;
403
404 case 8:
405 par->palette_sz = 256 * 2;
406 break;
407
408 default:
409 return -EINVAL;
410 }
411
412 bpl = width * bpp / 8;
413 par->databuf_sz = height * bpl + par->palette_sz;
414
415 return 0;
416 }
417
418 static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
419 unsigned blue, unsigned transp,
420 struct fb_info *info)
421 {
422 struct da8xx_fb_par *par = info->par;
423 unsigned short *palette = (unsigned short *)par->v_palette_base;
424 u_short pal;
425
426 if (regno > 255)
427 return 1;
428
429 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
430 return 1;
431
432 if (info->var.bits_per_pixel == 8) {
433 red >>= 4;
434 green >>= 8;
435 blue >>= 12;
436
437 pal = (red & 0x0f00);
438 pal |= (green & 0x00f0);
439 pal |= (blue & 0x000f);
440
441 palette[regno] = pal;
442
443 } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
444 red >>= (16 - info->var.red.length);
445 red <<= info->var.red.offset;
446
447 green >>= (16 - info->var.green.length);
448 green <<= info->var.green.offset;
449
450 blue >>= (16 - info->var.blue.length);
451 blue <<= info->var.blue.offset;
452
453 par->pseudo_palette[regno] = red | green | blue;
454
455 palette[0] = 0x4000;
456 }
457
458 return 0;
459 }
460
461 static void lcd_reset(struct da8xx_fb_par *par)
462 {
463 /* Disable the Raster if previously Enabled */
464 lcd_disable_raster();
465
466 /* DMA has to be disabled */
467 lcdc_write(0, LCD_DMA_CTRL_REG);
468 lcdc_write(0, LCD_RASTER_CTRL_REG);
469 }
470
471 static void lcd_calc_clk_divider(struct da8xx_fb_par *par)
472 {
473 unsigned int lcd_clk, div;
474
475 lcd_clk = clk_get_rate(par->lcdc_clk);
476 div = lcd_clk / par->pxl_clk;
477
478 /* Configure the LCD clock divisor. */
479 lcdc_write(LCD_CLK_DIVISOR(div) |
480 (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
481 }
482
483 static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
484 struct da8xx_panel *panel)
485 {
486 u32 bpp;
487 int ret = 0;
488
489 lcd_reset(par);
490
491 /* Calculate the divider */
492 lcd_calc_clk_divider(par);
493
494 if (panel->invert_pxl_clk)
495 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
496 LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
497 else
498 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
499 ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
500
501 /* Configure the DMA burst size. */
502 ret = lcd_cfg_dma(cfg->dma_burst_sz);
503 if (ret < 0)
504 return ret;
505
506 /* Configure the AC bias properties. */
507 lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
508
509 /* Configure the vertical and horizontal sync properties. */
510 lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp);
511 lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp);
512
513 /* Configure for disply */
514 ret = lcd_cfg_display(cfg);
515 if (ret < 0)
516 return ret;
517
518 if (QVGA != cfg->p_disp_panel->panel_type)
519 return -EINVAL;
520
521 if (cfg->bpp <= cfg->p_disp_panel->max_bpp &&
522 cfg->bpp >= cfg->p_disp_panel->min_bpp)
523 bpp = cfg->bpp;
524 else
525 bpp = cfg->p_disp_panel->max_bpp;
526 if (bpp == 12)
527 bpp = 16;
528 ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width,
529 (unsigned int)panel->height, bpp,
530 cfg->raster_order);
531 if (ret < 0)
532 return ret;
533
534 /* Configure FDD */
535 lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) |
536 (cfg->fdd << 12), LCD_RASTER_CTRL_REG);
537
538 return 0;
539 }
540
541 static irqreturn_t lcdc_irq_handler(int irq, void *arg)
542 {
543 u32 stat = lcdc_read(LCD_STAT_REG);
544
545 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
546 lcd_disable_raster();
547 lcdc_write(stat, LCD_STAT_REG);
548 lcd_enable_raster();
549 } else
550 lcdc_write(stat, LCD_STAT_REG);
551
552 return IRQ_HANDLED;
553 }
554
555 static int fb_check_var(struct fb_var_screeninfo *var,
556 struct fb_info *info)
557 {
558 int err = 0;
559
560 switch (var->bits_per_pixel) {
561 case 1:
562 case 8:
563 var->red.offset = 0;
564 var->red.length = 8;
565 var->green.offset = 0;
566 var->green.length = 8;
567 var->blue.offset = 0;
568 var->blue.length = 8;
569 var->transp.offset = 0;
570 var->transp.length = 0;
571 break;
572 case 4:
573 var->red.offset = 0;
574 var->red.length = 4;
575 var->green.offset = 0;
576 var->green.length = 4;
577 var->blue.offset = 0;
578 var->blue.length = 4;
579 var->transp.offset = 0;
580 var->transp.length = 0;
581 break;
582 case 16: /* RGB 565 */
583 var->red.offset = 11;
584 var->red.length = 5;
585 var->green.offset = 5;
586 var->green.length = 6;
587 var->blue.offset = 0;
588 var->blue.length = 5;
589 var->transp.offset = 0;
590 var->transp.length = 0;
591 break;
592 default:
593 err = -EINVAL;
594 }
595
596 var->red.msb_right = 0;
597 var->green.msb_right = 0;
598 var->blue.msb_right = 0;
599 var->transp.msb_right = 0;
600 return err;
601 }
602
603 #ifdef CONFIG_CPU_FREQ
604 static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
605 unsigned long val, void *data)
606 {
607 struct da8xx_fb_par *par;
608
609 par = container_of(nb, struct da8xx_fb_par, freq_transition);
610 if (val == CPUFREQ_PRECHANGE) {
611 lcd_disable_raster();
612 } else if (val == CPUFREQ_POSTCHANGE) {
613 lcd_calc_clk_divider(par);
614 lcd_enable_raster();
615 }
616
617 return 0;
618 }
619
620 static inline int lcd_da8xx_cpufreq_register(struct da8xx_fb_par *par)
621 {
622 par->freq_transition.notifier_call = lcd_da8xx_cpufreq_transition;
623
624 return cpufreq_register_notifier(&par->freq_transition,
625 CPUFREQ_TRANSITION_NOTIFIER);
626 }
627
628 static inline void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par)
629 {
630 cpufreq_unregister_notifier(&par->freq_transition,
631 CPUFREQ_TRANSITION_NOTIFIER);
632 }
633 #endif
634
635 static int __devexit fb_remove(struct platform_device *dev)
636 {
637 struct fb_info *info = dev_get_drvdata(&dev->dev);
638
639 if (info) {
640 struct da8xx_fb_par *par = info->par;
641
642 #ifdef CONFIG_CPU_FREQ
643 lcd_da8xx_cpufreq_deregister(par);
644 #endif
645 if (par->panel_power_ctrl)
646 par->panel_power_ctrl(0);
647
648 lcd_disable_raster();
649 lcdc_write(0, LCD_RASTER_CTRL_REG);
650
651 /* disable DMA */
652 lcdc_write(0, LCD_DMA_CTRL_REG);
653
654 unregister_framebuffer(info);
655 fb_dealloc_cmap(&info->cmap);
656 dma_free_coherent(NULL, par->databuf_sz + PAGE_SIZE,
657 info->screen_base - PAGE_SIZE,
658 info->fix.smem_start);
659 free_irq(par->irq, par);
660 clk_disable(par->lcdc_clk);
661 clk_put(par->lcdc_clk);
662 framebuffer_release(info);
663 iounmap((void __iomem *)da8xx_fb_reg_base);
664 release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
665
666 }
667 return 0;
668 }
669
670 static int fb_ioctl(struct fb_info *info, unsigned int cmd,
671 unsigned long arg)
672 {
673 struct lcd_sync_arg sync_arg;
674
675 switch (cmd) {
676 case FBIOGET_CONTRAST:
677 case FBIOPUT_CONTRAST:
678 case FBIGET_BRIGHTNESS:
679 case FBIPUT_BRIGHTNESS:
680 case FBIGET_COLOR:
681 case FBIPUT_COLOR:
682 return -ENOTTY;
683 case FBIPUT_HSYNC:
684 if (copy_from_user(&sync_arg, (char *)arg,
685 sizeof(struct lcd_sync_arg)))
686 return -EFAULT;
687 lcd_cfg_horizontal_sync(sync_arg.back_porch,
688 sync_arg.pulse_width,
689 sync_arg.front_porch);
690 break;
691 case FBIPUT_VSYNC:
692 if (copy_from_user(&sync_arg, (char *)arg,
693 sizeof(struct lcd_sync_arg)))
694 return -EFAULT;
695 lcd_cfg_vertical_sync(sync_arg.back_porch,
696 sync_arg.pulse_width,
697 sync_arg.front_porch);
698 break;
699 default:
700 return -EINVAL;
701 }
702 return 0;
703 }
704
705 static int cfb_blank(int blank, struct fb_info *info)
706 {
707 struct da8xx_fb_par *par = info->par;
708 int ret = 0;
709
710 if (par->blank == blank)
711 return 0;
712
713 par->blank = blank;
714 switch (blank) {
715 case FB_BLANK_UNBLANK:
716 if (par->panel_power_ctrl)
717 par->panel_power_ctrl(1);
718
719 lcd_enable_raster();
720 break;
721 case FB_BLANK_POWERDOWN:
722 if (par->panel_power_ctrl)
723 par->panel_power_ctrl(0);
724
725 lcd_disable_raster();
726 break;
727 default:
728 ret = -EINVAL;
729 }
730
731 return ret;
732 }
733
734 static struct fb_ops da8xx_fb_ops = {
735 .owner = THIS_MODULE,
736 .fb_check_var = fb_check_var,
737 .fb_setcolreg = fb_setcolreg,
738 .fb_ioctl = fb_ioctl,
739 .fb_fillrect = cfb_fillrect,
740 .fb_copyarea = cfb_copyarea,
741 .fb_imageblit = cfb_imageblit,
742 .fb_blank = cfb_blank,
743 };
744
745 static int __init fb_probe(struct platform_device *device)
746 {
747 struct da8xx_lcdc_platform_data *fb_pdata =
748 device->dev.platform_data;
749 struct lcd_ctrl_config *lcd_cfg;
750 struct da8xx_panel *lcdc_info;
751 struct fb_info *da8xx_fb_info;
752 struct clk *fb_clk = NULL;
753 struct da8xx_fb_par *par;
754 resource_size_t len;
755 int ret, i;
756
757 if (fb_pdata == NULL) {
758 dev_err(&device->dev, "Can not get platform data\n");
759 return -ENOENT;
760 }
761
762 lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0);
763 if (!lcdc_regs) {
764 dev_err(&device->dev,
765 "Can not get memory resource for LCD controller\n");
766 return -ENOENT;
767 }
768
769 len = resource_size(lcdc_regs);
770
771 lcdc_regs = request_mem_region(lcdc_regs->start, len, lcdc_regs->name);
772 if (!lcdc_regs)
773 return -EBUSY;
774
775 da8xx_fb_reg_base = (resource_size_t)ioremap(lcdc_regs->start, len);
776 if (!da8xx_fb_reg_base) {
777 ret = -EBUSY;
778 goto err_request_mem;
779 }
780
781 fb_clk = clk_get(&device->dev, NULL);
782 if (IS_ERR(fb_clk)) {
783 dev_err(&device->dev, "Can not get device clock\n");
784 ret = -ENODEV;
785 goto err_ioremap;
786 }
787 ret = clk_enable(fb_clk);
788 if (ret)
789 goto err_clk_put;
790
791 for (i = 0, lcdc_info = known_lcd_panels;
792 i < ARRAY_SIZE(known_lcd_panels);
793 i++, lcdc_info++) {
794 if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
795 break;
796 }
797
798 if (i == ARRAY_SIZE(known_lcd_panels)) {
799 dev_err(&device->dev, "GLCD: No valid panel found\n");
800 ret = -ENODEV;
801 goto err_clk_disable;
802 } else
803 dev_info(&device->dev, "GLCD: Found %s panel\n",
804 fb_pdata->type);
805
806 lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
807
808 da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par),
809 &device->dev);
810 if (!da8xx_fb_info) {
811 dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
812 ret = -ENOMEM;
813 goto err_clk_disable;
814 }
815
816 par = da8xx_fb_info->par;
817 par->lcdc_clk = fb_clk;
818 par->pxl_clk = lcdc_info->pxl_clk;
819 if (fb_pdata->panel_power_ctrl) {
820 par->panel_power_ctrl = fb_pdata->panel_power_ctrl;
821 par->panel_power_ctrl(1);
822 }
823
824 if (lcd_init(par, lcd_cfg, lcdc_info) < 0) {
825 dev_err(&device->dev, "lcd_init failed\n");
826 ret = -EFAULT;
827 goto err_release_fb;
828 }
829
830 /* allocate frame buffer */
831 da8xx_fb_info->screen_base = dma_alloc_coherent(NULL,
832 par->databuf_sz + PAGE_SIZE,
833 (resource_size_t *)
834 &da8xx_fb_info->fix.smem_start,
835 GFP_KERNEL | GFP_DMA);
836
837 if (!da8xx_fb_info->screen_base) {
838 dev_err(&device->dev,
839 "GLCD: kmalloc for frame buffer failed\n");
840 ret = -EINVAL;
841 goto err_release_fb;
842 }
843
844 /* move palette base pointer by (PAGE_SIZE - palette_sz) bytes */
845 par->v_palette_base = da8xx_fb_info->screen_base +
846 (PAGE_SIZE - par->palette_sz);
847 par->p_palette_base = da8xx_fb_info->fix.smem_start +
848 (PAGE_SIZE - par->palette_sz);
849
850 /* the rest of the frame buffer is pixel data */
851 da8xx_fb_info->screen_base = par->v_palette_base + par->palette_sz;
852 da8xx_fb_fix.smem_start = par->p_palette_base + par->palette_sz;
853 da8xx_fb_fix.smem_len = par->databuf_sz - par->palette_sz;
854 da8xx_fb_fix.line_length = (lcdc_info->width * lcd_cfg->bpp) / 8;
855
856 par->irq = platform_get_irq(device, 0);
857 if (par->irq < 0) {
858 ret = -ENOENT;
859 goto err_release_fb_mem;
860 }
861
862 ret = request_irq(par->irq, lcdc_irq_handler, 0, DRIVER_NAME, par);
863 if (ret)
864 goto err_release_fb_mem;
865
866 /* Initialize par */
867 da8xx_fb_info->var.bits_per_pixel = lcd_cfg->bpp;
868
869 da8xx_fb_var.xres = lcdc_info->width;
870 da8xx_fb_var.xres_virtual = lcdc_info->width;
871
872 da8xx_fb_var.yres = lcdc_info->height;
873 da8xx_fb_var.yres_virtual = lcdc_info->height;
874
875 da8xx_fb_var.grayscale =
876 lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0;
877 da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp;
878
879 da8xx_fb_var.hsync_len = lcdc_info->hsw;
880 da8xx_fb_var.vsync_len = lcdc_info->vsw;
881
882 /* Initialize fbinfo */
883 da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
884 da8xx_fb_info->fix = da8xx_fb_fix;
885 da8xx_fb_info->var = da8xx_fb_var;
886 da8xx_fb_info->fbops = &da8xx_fb_ops;
887 da8xx_fb_info->pseudo_palette = par->pseudo_palette;
888 da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
889 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
890
891 ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0);
892 if (ret)
893 goto err_free_irq;
894
895 /* First palette_sz byte of the frame buffer is the palette */
896 da8xx_fb_info->cmap.len = par->palette_sz;
897
898 /* Flush the buffer to the screen. */
899 lcd_blit(LOAD_DATA, par);
900
901 /* initialize var_screeninfo */
902 da8xx_fb_var.activate = FB_ACTIVATE_FORCE;
903 fb_set_var(da8xx_fb_info, &da8xx_fb_var);
904
905 dev_set_drvdata(&device->dev, da8xx_fb_info);
906 /* Register the Frame Buffer */
907 if (register_framebuffer(da8xx_fb_info) < 0) {
908 dev_err(&device->dev,
909 "GLCD: Frame Buffer Registration Failed!\n");
910 ret = -EINVAL;
911 goto err_dealloc_cmap;
912 }
913
914 #ifdef CONFIG_CPU_FREQ
915 ret = lcd_da8xx_cpufreq_register(par);
916 if (ret) {
917 dev_err(&device->dev, "failed to register cpufreq\n");
918 goto err_cpu_freq;
919 }
920 #endif
921
922 /* enable raster engine */
923 lcd_enable_raster();
924
925 return 0;
926
927 #ifdef CONFIG_CPU_FREQ
928 err_cpu_freq:
929 unregister_framebuffer(da8xx_fb_info);
930 #endif
931
932 err_dealloc_cmap:
933 fb_dealloc_cmap(&da8xx_fb_info->cmap);
934
935 err_free_irq:
936 free_irq(par->irq, par);
937
938 err_release_fb_mem:
939 dma_free_coherent(NULL, par->databuf_sz + PAGE_SIZE,
940 da8xx_fb_info->screen_base - PAGE_SIZE,
941 da8xx_fb_info->fix.smem_start);
942
943 err_release_fb:
944 framebuffer_release(da8xx_fb_info);
945
946 err_clk_disable:
947 clk_disable(fb_clk);
948
949 err_clk_put:
950 clk_put(fb_clk);
951
952 err_ioremap:
953 iounmap((void __iomem *)da8xx_fb_reg_base);
954
955 err_request_mem:
956 release_mem_region(lcdc_regs->start, len);
957
958 return ret;
959 }
960
961 #ifdef CONFIG_PM
962 static int fb_suspend(struct platform_device *dev, pm_message_t state)
963 {
964 struct fb_info *info = platform_get_drvdata(dev);
965 struct da8xx_fb_par *par = info->par;
966
967 acquire_console_sem();
968 if (par->panel_power_ctrl)
969 par->panel_power_ctrl(0);
970
971 fb_set_suspend(info, 1);
972 lcd_disable_raster();
973 clk_disable(par->lcdc_clk);
974 release_console_sem();
975
976 return 0;
977 }
978 static int fb_resume(struct platform_device *dev)
979 {
980 struct fb_info *info = platform_get_drvdata(dev);
981 struct da8xx_fb_par *par = info->par;
982
983 acquire_console_sem();
984 if (par->panel_power_ctrl)
985 par->panel_power_ctrl(1);
986
987 clk_enable(par->lcdc_clk);
988 lcd_enable_raster();
989 fb_set_suspend(info, 0);
990 release_console_sem();
991
992 return 0;
993 }
994 #else
995 #define fb_suspend NULL
996 #define fb_resume NULL
997 #endif
998
999 static struct platform_driver da8xx_fb_driver = {
1000 .probe = fb_probe,
1001 .remove = fb_remove,
1002 .suspend = fb_suspend,
1003 .resume = fb_resume,
1004 .driver = {
1005 .name = DRIVER_NAME,
1006 .owner = THIS_MODULE,
1007 },
1008 };
1009
1010 static int __init da8xx_fb_init(void)
1011 {
1012 return platform_driver_register(&da8xx_fb_driver);
1013 }
1014
1015 static void __exit da8xx_fb_cleanup(void)
1016 {
1017 platform_driver_unregister(&da8xx_fb_driver);
1018 }
1019
1020 module_init(da8xx_fb_init);
1021 module_exit(da8xx_fb_cleanup);
1022
1023 MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx");
1024 MODULE_AUTHOR("Texas Instruments");
1025 MODULE_LICENSE("GPL");