summaryrefslogtreecommitdiffstats
path: root/drivers/video/fbdev/bfin-t350mcqb-fb.c
blob: e5ee4d9677f791983a344a79b85d7f250b4eb3fb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
/*
 * File:         drivers/video/bfin-t350mcqb-fb.c
 * Based on:
 * Author:       Michael Hennerich <hennerich@blackfin.uclinux.org>
 *
 * Created:
 * Description:  Blackfin LCD Framebuffer driver
 *
 *
 * Modified:
 *               Copyright 2004-2007 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/gfp.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/backlight.h>
#include <linux/lcd.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>

#include <asm/blackfin.h>
#include <asm/irq.h>
#include <asm/dma-mapping.h>
#include <asm/dma.h>
#include <asm/portmux.h>
#include <asm/gptimers.h>

#define NO_BL_SUPPORT

#define LCD_X_RES		320	/* Horizontal Resolution */
#define LCD_Y_RES		240	/* Vertical Resolution */
#define LCD_BPP			24	/* Bit Per Pixel */

#define	DMA_BUS_SIZE		16
#define	LCD_CLK         	(12*1000*1000)	/* 12MHz */

#define CLOCKS_PER_PIX		3

	/*
	 * HS and VS timing parameters (all in number of PPI clk ticks)
	 */

#define U_LINE		1				/* Blanking Lines */

#define H_ACTPIX	(LCD_X_RES * CLOCKS_PER_PIX)	/* active horizontal pixel */
#define H_PERIOD	(408 * CLOCKS_PER_PIX)		/* HS period */
#define H_PULSE		90				/* HS pulse width */
#define H_START		204				/* first valid pixel */

#define	V_LINES		(LCD_Y_RES + U_LINE)		/* total vertical lines */
#define V_PULSE		(3 * H_PERIOD)			/* VS pulse width (1-5 H_PERIODs) */
#define V_PERIOD	(H_PERIOD * V_LINES)		/* VS period */

#define ACTIVE_VIDEO_MEM_OFFSET	(U_LINE * H_ACTPIX)

#define BFIN_LCD_NBR_PALETTE_ENTRIES	256

#define DRIVER_NAME "bfin-t350mcqb"
static char driver_name[] = DRIVER_NAME;

struct bfin_t350mcqbfb_info {
	struct fb_info *fb;
	struct device *dev;
	unsigned char *fb_buffer;	/* RGB Buffer */
	dma_addr_t dma_handle;
	int lq043_open_cnt;
	int irq;
	spinlock_t lock;	/* lock */
	u32 pseudo_pal[16];
};

static int nocursor;
module_param(nocursor, int, 0644);
MODULE_PARM_DESC(nocursor, "cursor enable/disable");

#define PPI_TX_MODE		0x2
#define PPI_XFER_TYPE_11	0xC
#define PPI_PORT_CFG_01		0x10
#define PPI_PACK_EN		0x80
#define PPI_POLS_1		0x8000

static void bfin_t350mcqb_config_ppi(struct bfin_t350mcqbfb_info *fbi)
{
	bfin_write_PPI_DELAY(H_START);
	bfin_write_PPI_COUNT(H_ACTPIX-1);
	bfin_write_PPI_FRAME(V_LINES);

	bfin_write_PPI_CONTROL(PPI_TX_MODE |	   /* output mode , PORT_DIR */
				PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
				PPI_PORT_CFG_01 |  /* two frame sync PORT_CFG */
				PPI_PACK_EN |	   /* packing enabled PACK_EN */
				PPI_POLS_1);	   /* faling edge syncs POLS */
}

static inline void bfin_t350mcqb_disable_ppi(void)
{
	bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
}

static inline void bfin_t350mcqb_enable_ppi(void)
{
	bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
}

static void bfin_t350mcqb_start_timers(void)
{
	unsigned long flags;

	local_irq_save(flags);
		enable_gptimers(TIMER1bit);
		enable_gptimers(TIMER0bit);
	local_irq_restore(flags);
}

static void bfin_t350mcqb_stop_timers(void)
{
	disable_gptimers(TIMER0bit | TIMER1bit);

	set_gptimer_status(0, TIMER_STATUS_TRUN0 | TIMER_STATUS_TRUN1 |
				TIMER_STATUS_TIMIL0 | TIMER_STATUS_TIMIL1 |
				 TIMER_STATUS_TOVF0 | TIMER_STATUS_TOVF1);

}

static void bfin_t350mcqb_init_timers(void)
{

	bfin_t350mcqb_stop_timers();

	set_gptimer_period(TIMER0_id, H_PERIOD);
	set_gptimer_pwidth(TIMER0_id, H_PULSE);
	set_gptimer_config(TIMER0_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
				      TIMER_TIN_SEL | TIMER_CLK_SEL|
				      TIMER_EMU_RUN);

	set_gptimer_period(TIMER1_id, V_PERIOD);
	set_gptimer_pwidth(TIMER1_id, V_PULSE);
	set_gptimer_config(TIMER1_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
				      TIMER_TIN_SEL | TIMER_CLK_SEL |
				      TIMER_EMU_RUN);

}

static void bfin_t350mcqb_config_dma(struct bfin_t350mcqbfb_info *fbi)
{

	set_dma_config(CH_PPI,
		       set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
					   INTR_DISABLE, DIMENSION_2D,
					   DATA_SIZE_16,
					   DMA_NOSYNC_KEEP_DMA_BUF));
	set_dma_x_count(CH_PPI, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
	set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
	set_dma_y_count(CH_PPI, V_LINES);

	set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
	set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);

}

static	u16 ppi0_req_8[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
			    P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
			    P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
			    P_PPI0_D6, P_PPI0_D7, 0};

static int bfin_t350mcqb_request_ports(int action)
{
	if (action) {
		if (peripheral_request_list(ppi0_req_8, DRIVER_NAME)) {
			printk(KERN_ERR "Requesting Peripherals failed\n");
			return -EFAULT;
		}
	} else
		peripheral_free_list(ppi0_req_8);

	return 0;
}

static int bfin_t350mcqb_fb_open(struct fb_info *info, int user)
{
	struct bfin_t350mcqbfb_info *fbi = info->par;

	spin_lock(&fbi->lock);
	fbi->lq043_open_cnt++;

	if (fbi->lq043_open_cnt <= 1) {

		bfin_t350mcqb_disable_ppi();
		SSYNC();

		bfin_t350mcqb_config_dma(fbi);
		bfin_t350mcqb_config_ppi(fbi);
		bfin_t350mcqb_init_timers();

		/* start dma */
		enable_dma(CH_PPI);
		bfin_t350mcqb_enable_ppi();
		bfin_t350mcqb_start_timers();
	}

	spin_unlock(&fbi->lock);

	return 0;
}

static int bfin_t350mcqb_fb_release(struct fb_info *info, int user)
{
	struct bfin_t350mcqbfb_info *fbi = info->par;

	spin_lock(&fbi->lock);

	fbi->lq043_open_cnt--;

	if (fbi->lq043_open_cnt <= 0) {
		bfin_t350mcqb_disable_ppi();
		SSYNC();
		disable_dma(CH_PPI);
		bfin_t350mcqb_stop_timers();
	}

	spin_unlock(&fbi->lock);

	return 0;
}

static int bfin_t350mcqb_fb_check_var(struct fb_var_screeninfo *var,
				   struct fb_info *info)
{

	switch (var->bits_per_pixel) {
	case 24:/* TRUECOLOUR, 16m */
		var->red.offset = 0;
		var->green.offset = 8;
		var->blue.offset = 16;
		var->red.length = var->green.length = var->blue.length = 8;
		var->transp.offset = 0;
		var->transp.length = 0;
		var->transp.msb_right = 0;
		var->red.msb_right = 0;
		var->green.msb_right = 0;
		var->blue.msb_right = 0;
		break;
	default:
		pr_debug("%s: depth not supported: %u BPP\n", __func__,
			 var->bits_per_pixel);
		return -EINVAL;
	}

	if (info->var.xres != var->xres || info->var.yres != var->yres ||
	    info->var.xres_virtual != var->xres_virtual ||
	    info->var.yres_virtual != var->yres_virtual) {
		pr_debug("%s: Resolution not supported: X%u x Y%u \n",
			 __func__, var->xres, var->yres);
		return -EINVAL;
	}

	/*
	 *  Memory limit
	 */

	if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
		pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
			 __func__, var->yres_virtual);
		return -ENOMEM;
	}

	return 0;
}

int bfin_t350mcqb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
	if (nocursor)
		return 0;
	else
		return -EINVAL;	/* just to force soft_cursor() call */
}

static int bfin_t350mcqb_fb_setcolreg(u_int regno, u_int red, u_int green,
				   u_int blue, u_int transp,
				   struct fb_info *info)
{
	if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
		return -EINVAL;

	if (info->var.grayscale) {
		/* grayscale = 0.30*R + 0.59*G + 0.11*B */
		red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
	}

	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {

		u32 value;
		/* Place color in the pseudopalette */
		if (regno > 16)
			return -EINVAL;

		red >>= (16 - info->var.red.length);
		green >>= (16 - info->var.green.length);
		blue >>= (16 - info->var.blue.length);

		value = (red << info->var.red.offset) |
		    (green << info->var.green.offset) |
		    (blue << info->var.blue.offset);
		value &= 0xFFFFFF;

		((u32 *) (info->pseudo_palette))[regno] = value;

	}

	return 0;
}

static struct fb_ops bfin_t350mcqb_fb_ops = {
	.owner = THIS_MODULE,
	.fb_open = bfin_t350mcqb_fb_open,
	.fb_release = bfin_t350mcqb_fb_release,
	.fb_check_var = bfin_t350mcqb_fb_check_var,
	.fb_fillrect = cfb_fillrect,
	.fb_copyarea = cfb_copyarea,
	.fb_imageblit = cfb_imageblit,
	.fb_cursor = bfin_t350mcqb_fb_cursor,
	.fb_setcolreg = bfin_t350mcqb_fb_setcolreg,
};

#ifndef NO_BL_SUPPORT
static int bl_get_brightness(struct backlight_device *bd)
{
	return 0;
}

static const struct backlight_ops bfin_lq043fb_bl_ops = {
	.get_brightness = bl_get_brightness,
};

static struct backlight_device *bl_dev;

static int bfin_lcd_get_power(struct lcd_device *dev)
{
	return 0;
}

static int bfin_lcd_set_power(struct lcd_device *dev, int power)
{
	return 0;
}

static int bfin_lcd_get_contrast(struct lcd_device *dev)
{
	return 0;
}

static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
{

	return 0;
}

static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
{
	if (!fi || (fi == &bfin_t350mcqb_fb))
		return 1;
	return 0;
}

static struct lcd_ops bfin_lcd_ops = {
	.get_power = bfin_lcd_get_power,
	.set_power = bfin_lcd_set_power,
	.get_contrast = bfin_lcd_get_contrast,
	.set_contrast = bfin_lcd_set_contrast,
	.check_fb = bfin_lcd_check_fb,
};

static struct lcd_device *lcd_dev;
#endif

static irqreturn_t bfin_t350mcqb_irq_error(int irq, void *dev_id)
{
	/*struct bfin_t350mcqbfb_info *info = (struct bfin_t350mcqbfb_info *)dev_id;*/

	u16 status = bfin_read_PPI_STATUS();
	bfin_write_PPI_STATUS(0xFFFF);

	if (status) {
		bfin_t350mcqb_disable_ppi();
		disable_dma(CH_PPI);

		/* start dma */
		enable_dma(CH_PPI);
		bfin_t350mcqb_enable_ppi();
		bfin_write_PPI_STATUS(0xFFFF);
	}

	return IRQ_HANDLED;
}

static int bfin_t350mcqb_probe(struct platform_device *pdev)
{
#ifndef NO_BL_SUPPORT
	struct backlight_properties props;
#endif
	struct bfin_t350mcqbfb_info *info;
	struct fb_info *fbinfo;
	int ret;

	printk(KERN_INFO DRIVER_NAME ": %dx%d %d-bit RGB FrameBuffer initializing...\n",
					 LCD_X_RES, LCD_Y_RES, LCD_BPP);

	if (request_dma(CH_PPI, "CH_PPI") < 0) {
		printk(KERN_ERR DRIVER_NAME
		       ": couldn't request CH_PPI DMA\n");
		ret = -EFAULT;
		goto out1;
	}

	fbinfo =
	    framebuffer_alloc(sizeof(struct bfin_t350mcqbfb_info), &pdev->dev);
	if (!fbinfo) {
		ret = -ENOMEM;
		goto out2;
	}

	info = fbinfo->par;
	info->fb = fbinfo;
	info->dev = &pdev->dev;
	spin_lock_init(&info->lock);

	platform_set_drvdata(pdev, fbinfo);

	strcpy(fbinfo->fix.id, driver_name);

	fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
	fbinfo->fix.type_aux = 0;
	fbinfo->fix.xpanstep = 0;
	fbinfo->fix.ypanstep = 0;
	fbinfo->fix.ywrapstep = 0;
	fbinfo->fix.accel = FB_ACCEL_NONE;
	fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;

	fbinfo->var.nonstd = 0;
	fbinfo->var.activate = FB_ACTIVATE_NOW;
	fbinfo->var.height = 53;
	fbinfo->var.width = 70;
	fbinfo->var.accel_flags = 0;
	fbinfo->var.vmode = FB_VMODE_NONINTERLACED;

	fbinfo->var.xres = LCD_X_RES;
	fbinfo->var.xres_virtual = LCD_X_RES;
	fbinfo->var.yres = LCD_Y_RES;
	fbinfo->var.yres_virtual = LCD_Y_RES;
	fbinfo->var.bits_per_pixel = LCD_BPP;

	fbinfo->var.red.offset = 0;
	fbinfo->var.green.offset = 8;
	fbinfo->var.blue.offset = 16;
	fbinfo->var.transp.offset = 0;
	fbinfo->var.red.length = 8;
	fbinfo->var.green.length = 8;
	fbinfo->var.blue.length = 8;
	fbinfo->var.transp.length = 0;
	fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * LCD_BPP / 8;

	fbinfo->fix.line_length = fbinfo->var.xres_virtual *
	    fbinfo->var.bits_per_pixel / 8;


	fbinfo->fbops = &bfin_t350mcqb_fb_ops;
	fbinfo->flags = FBINFO_FLAG_DEFAULT;

	info->fb_buffer = dma_alloc_coherent(NULL, fbinfo->fix.smem_len +
				ACTIVE_VIDEO_MEM_OFFSET,
				&info->dma_handle, GFP_KERNEL);

	if (NULL == info->fb_buffer) {
		printk(KERN_ERR DRIVER_NAME
		       ": couldn't allocate dma buffer.\n");
		ret = -ENOMEM;
		goto out3;
	}

	fbinfo->screen_base = (void *)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
	fbinfo->fix.smem_start = (int)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;

	fbinfo->fbops = &bfin_t350mcqb_fb_ops;

	fbinfo->pseudo_palette = &info->pseudo_pal;

	if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
	    < 0) {
		printk(KERN_ERR DRIVER_NAME
		       "Fail to allocate colormap (%d entries)\n",
		       BFIN_LCD_NBR_PALETTE_ENTRIES);
		ret = -EFAULT;
		goto out4;
	}

	if (bfin_t350mcqb_request_ports(1)) {
		printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
		ret = -EFAULT;
		goto out6;
	}

	info->irq = platform_get_irq(pdev, 0);
	if (info->irq < 0) {
		ret = -EINVAL;
		goto out7;
	}

	ret = request_irq(info->irq, bfin_t350mcqb_irq_error, 0,
			"PPI ERROR", info);
	if (ret < 0) {
		printk(KERN_ERR DRIVER_NAME
		       ": unable to request PPI ERROR IRQ\n");
		goto out7;
	}

	if (register_framebuffer(fbinfo) < 0) {
		printk(KERN_ERR DRIVER_NAME
		       ": unable to register framebuffer.\n");
		ret = -EINVAL;
		goto out8;
	}
#ifndef NO_BL_SUPPORT
	memset(&props, 0, sizeof(struct backlight_properties));
	props.type = BACKLIGHT_RAW;
	props.max_brightness = 255;
	bl_dev = backlight_device_register("bf52x-bl", NULL, NULL,
					   &bfin_lq043fb_bl_ops, &props);
	if (IS_ERR(bl_dev)) {
		printk(KERN_ERR DRIVER_NAME
			": unable to register backlight.\n");
		ret = -EINVAL;
		unregister_framebuffer(fbinfo);
		goto out8;
	}

	lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
	lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
#endif

	return 0;

out8:
	free_irq(info->irq, info);
out7:
	bfin_t350mcqb_request_ports(0);
out6:
	fb_dealloc_cmap(&fbinfo->cmap);
out4:
	dma_free_coherent(NULL, fbinfo->fix.smem_len + ACTIVE_VIDEO_MEM_OFFSET,
			 info->fb_buffer, info->dma_handle);
out3:
	framebuffer_release(fbinfo);
out2:
	free_dma(CH_PPI);
out1:

	return ret;
}

static int bfin_t350mcqb_remove(struct platform_device *pdev)
{

	struct fb_info *fbinfo = platform_get_drvdata(pdev);
	struct bfin_t350mcqbfb_info *info = fbinfo->par;

	unregister_framebuffer(fbinfo);

	free_dma(CH_PPI);
	free_irq(info->irq, info);

	if (info->fb_buffer != NULL)
		dma_free_coherent(NULL, fbinfo->fix.smem_len +
			ACTIVE_VIDEO_MEM_OFFSET, info->fb_buffer,
			info->dma_handle);

	fb_dealloc_cmap(&fbinfo->cmap);

#ifndef NO_BL_SUPPORT
	lcd_device_unregister(lcd_dev);
	backlight_device_unregister(bl_dev);
#endif

	bfin_t350mcqb_request_ports(0);

	framebuffer_release(fbinfo);

	printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");

	return 0;
}

#ifdef CONFIG_PM
static int bfin_t350mcqb_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct fb_info *fbinfo = platform_get_drvdata(pdev);
	struct bfin_t350mcqbfb_info *fbi = fbinfo->par;

	if (fbi->lq043_open_cnt) {
		bfin_t350mcqb_disable_ppi();
		disable_dma(CH_PPI);
		bfin_t350mcqb_stop_timers();
		bfin_write_PPI_STATUS(-1);
	}


	return 0;
}

static int bfin_t350mcqb_resume(struct platform_device *pdev)
{
	struct fb_info *fbinfo = platform_get_drvdata(pdev);
	struct bfin_t350mcqbfb_info *fbi = fbinfo->par;

	if (fbi->lq043_open_cnt) {
		bfin_t350mcqb_config_dma(fbi);
		bfin_t350mcqb_config_ppi(fbi);
		bfin_t350mcqb_init_timers();

		/* start dma */
		enable_dma(CH_PPI);
		bfin_t350mcqb_enable_ppi();
		bfin_t350mcqb_start_timers();
	}

	return 0;
}
#else
#define bfin_t350mcqb_suspend	NULL
#define bfin_t350mcqb_resume	NULL
#endif

static struct platform_driver bfin_t350mcqb_driver = {
	.probe = bfin_t350mcqb_probe,
	.remove = bfin_t350mcqb_remove,
	.suspend = bfin_t350mcqb_suspend,
	.resume = bfin_t350mcqb_resume,
	.driver = {
		   .name = DRIVER_NAME,
		   },
};
module_platform_driver(bfin_t350mcqb_driver);

MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud