90cfddabf1f7618548275f99ec292f5f6573b8e6
[sfrench/cifs-2.6.git] / drivers / video / bfin-t350mcqb-fb.c
1 /*
2  * File:         drivers/video/bfin-t350mcqb-fb.c
3  * Based on:
4  * Author:       Michael Hennerich <hennerich@blackfin.uclinux.org>
5  *
6  * Created:
7  * Description:  Blackfin LCD Framebufer driver
8  *
9  *
10  * Modified:
11  *               Copyright 2004-2007 Analog Devices Inc.
12  *
13  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
14  *
15  * This program is free software; you can redistribute it and/or modify
16  * it under the terms of the GNU General Public License as published by
17  * the Free Software Foundation; either version 2 of the License, or
18  * (at your option) any later version.
19  *
20  * This program is distributed in the hope that it will be useful,
21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
23  * GNU General Public License for more details.
24  *
25  * You should have received a copy of the GNU General Public License
26  * along with this program; if not, see the file COPYING, or write
27  * to the Free Software Foundation, Inc.,
28  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
29  */
30
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/errno.h>
34 #include <linux/string.h>
35 #include <linux/fb.h>
36 #include <linux/init.h>
37 #include <linux/types.h>
38 #include <linux/interrupt.h>
39 #include <linux/device.h>
40 #include <linux/backlight.h>
41 #include <linux/lcd.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/platform_device.h>
44
45 #include <asm/blackfin.h>
46 #include <asm/irq.h>
47 #include <asm/dma-mapping.h>
48 #include <asm/dma.h>
49 #include <asm/portmux.h>
50 #include <asm/gptimers.h>
51
52 #define NO_BL_SUPPORT
53
54 #define LCD_X_RES               320     /* Horizontal Resolution */
55 #define LCD_Y_RES               240     /* Vertical Resolution */
56 #define LCD_BPP                 24      /* Bit Per Pixel */
57
58 #define DMA_BUS_SIZE            16
59 #define LCD_CLK                 (12*1000*1000)  /* 12MHz */
60
61 #define CLOCKS_PER_PIX          3
62
63         /*
64          * HS and VS timing parameters (all in number of PPI clk ticks)
65          */
66
67 #define U_LINE          1                               /* Blanking Lines */
68
69 #define H_ACTPIX        (LCD_X_RES * CLOCKS_PER_PIX)    /* active horizontal pixel */
70 #define H_PERIOD        (408 * CLOCKS_PER_PIX)          /* HS period */
71 #define H_PULSE         90                              /* HS pulse width */
72 #define H_START         204                             /* first valid pixel */
73
74 #define V_LINES         (LCD_Y_RES + U_LINE)            /* total vertical lines */
75 #define V_PULSE         (3 * H_PERIOD)                  /* VS pulse width (1-5 H_PERIODs) */
76 #define V_PERIOD        (H_PERIOD * V_LINES)            /* VS period */
77
78 #define ACTIVE_VIDEO_MEM_OFFSET (U_LINE * H_ACTPIX)
79
80 #define BFIN_LCD_NBR_PALETTE_ENTRIES    256
81
82 #define DRIVER_NAME "bfin-t350mcqb"
83 static char driver_name[] = DRIVER_NAME;
84
85 struct bfin_t350mcqbfb_info {
86         struct fb_info *fb;
87         struct device *dev;
88         unsigned char *fb_buffer;       /* RGB Buffer */
89         dma_addr_t dma_handle;
90         int lq043_mmap;
91         int lq043_open_cnt;
92         int irq;
93         spinlock_t lock;        /* lock */
94         u32 pseudo_pal[16];
95 };
96
97 static int nocursor;
98 module_param(nocursor, int, 0644);
99 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
100
101 #define PPI_TX_MODE             0x2
102 #define PPI_XFER_TYPE_11        0xC
103 #define PPI_PORT_CFG_01         0x10
104 #define PPI_PACK_EN             0x80
105 #define PPI_POLS_1              0x8000
106
107 static void bfin_t350mcqb_config_ppi(struct bfin_t350mcqbfb_info *fbi)
108 {
109         bfin_write_PPI_DELAY(H_START);
110         bfin_write_PPI_COUNT(H_ACTPIX-1);
111         bfin_write_PPI_FRAME(V_LINES);
112
113         bfin_write_PPI_CONTROL(PPI_TX_MODE |       /* output mode , PORT_DIR */
114                                 PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
115                                 PPI_PORT_CFG_01 |  /* two frame sync PORT_CFG */
116                                 PPI_PACK_EN |      /* packing enabled PACK_EN */
117                                 PPI_POLS_1);       /* faling edge syncs POLS */
118 }
119
120 static inline void bfin_t350mcqb_disable_ppi(void)
121 {
122         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
123 }
124
125 static inline void bfin_t350mcqb_enable_ppi(void)
126 {
127         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
128 }
129
130 static void bfin_t350mcqb_start_timers(void)
131 {
132         unsigned long flags;
133
134         local_irq_save(flags);
135                 enable_gptimers(TIMER1bit);
136                 enable_gptimers(TIMER0bit);
137         local_irq_restore(flags);
138 }
139
140 static void bfin_t350mcqb_stop_timers(void)
141 {
142         disable_gptimers(TIMER0bit | TIMER1bit);
143
144         set_gptimer_status(0, TIMER_STATUS_TRUN0 | TIMER_STATUS_TRUN1 |
145                                 TIMER_STATUS_TIMIL0 | TIMER_STATUS_TIMIL1 |
146                                  TIMER_STATUS_TOVF0 | TIMER_STATUS_TOVF1);
147
148 }
149
150 static void bfin_t350mcqb_init_timers(void)
151 {
152
153         bfin_t350mcqb_stop_timers();
154
155         set_gptimer_period(TIMER0_id, H_PERIOD);
156         set_gptimer_pwidth(TIMER0_id, H_PULSE);
157         set_gptimer_config(TIMER0_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
158                                       TIMER_TIN_SEL | TIMER_CLK_SEL|
159                                       TIMER_EMU_RUN);
160
161         set_gptimer_period(TIMER1_id, V_PERIOD);
162         set_gptimer_pwidth(TIMER1_id, V_PULSE);
163         set_gptimer_config(TIMER1_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
164                                       TIMER_TIN_SEL | TIMER_CLK_SEL |
165                                       TIMER_EMU_RUN);
166
167 }
168
169 static void bfin_t350mcqb_config_dma(struct bfin_t350mcqbfb_info *fbi)
170 {
171
172         set_dma_config(CH_PPI,
173                        set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
174                                            INTR_DISABLE, DIMENSION_2D,
175                                            DATA_SIZE_16,
176                                            DMA_NOSYNC_KEEP_DMA_BUF));
177         set_dma_x_count(CH_PPI, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
178         set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
179         set_dma_y_count(CH_PPI, V_LINES);
180
181         set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
182         set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
183
184 }
185
186 static  u16 ppi0_req_8[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
187                             P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
188                             P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
189                             P_PPI0_D6, P_PPI0_D7, 0};
190
191 static int bfin_t350mcqb_request_ports(int action)
192 {
193         if (action) {
194                 if (peripheral_request_list(ppi0_req_8, DRIVER_NAME)) {
195                         printk(KERN_ERR "Requesting Peripherals faild\n");
196                         return -EFAULT;
197                 }
198         } else
199                 peripheral_free_list(ppi0_req_8);
200
201         return 0;
202 }
203
204 static int bfin_t350mcqb_fb_open(struct fb_info *info, int user)
205 {
206         struct bfin_t350mcqbfb_info *fbi = info->par;
207
208         spin_lock(&fbi->lock);
209         fbi->lq043_open_cnt++;
210
211         if (fbi->lq043_open_cnt <= 1) {
212
213                 bfin_t350mcqb_disable_ppi();
214                 SSYNC();
215
216                 bfin_t350mcqb_config_dma(fbi);
217                 bfin_t350mcqb_config_ppi(fbi);
218                 bfin_t350mcqb_init_timers();
219
220                 /* start dma */
221                 enable_dma(CH_PPI);
222                 bfin_t350mcqb_enable_ppi();
223                 bfin_t350mcqb_start_timers();
224         }
225
226         spin_unlock(&fbi->lock);
227
228         return 0;
229 }
230
231 static int bfin_t350mcqb_fb_release(struct fb_info *info, int user)
232 {
233         struct bfin_t350mcqbfb_info *fbi = info->par;
234
235         spin_lock(&fbi->lock);
236
237         fbi->lq043_open_cnt--;
238         fbi->lq043_mmap = 0;
239
240         if (fbi->lq043_open_cnt <= 0) {
241                 bfin_t350mcqb_disable_ppi();
242                 SSYNC();
243                 disable_dma(CH_PPI);
244                 bfin_t350mcqb_stop_timers();
245                 memset(fbi->fb_buffer, 0, info->fix.smem_len);
246         }
247
248         spin_unlock(&fbi->lock);
249
250         return 0;
251 }
252
253 static int bfin_t350mcqb_fb_check_var(struct fb_var_screeninfo *var,
254                                    struct fb_info *info)
255 {
256
257         switch (var->bits_per_pixel) {
258         case 24:/* TRUECOLOUR, 16m */
259                 var->red.offset = 0;
260                 var->green.offset = 8;
261                 var->blue.offset = 16;
262                 var->red.length = var->green.length = var->blue.length = 8;
263                 var->transp.offset = 0;
264                 var->transp.length = 0;
265                 var->transp.msb_right = 0;
266                 var->red.msb_right = 0;
267                 var->green.msb_right = 0;
268                 var->blue.msb_right = 0;
269                 break;
270         default:
271                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
272                          var->bits_per_pixel);
273                 return -EINVAL;
274         }
275
276         if (info->var.xres != var->xres || info->var.yres != var->yres ||
277             info->var.xres_virtual != var->xres_virtual ||
278             info->var.yres_virtual != var->yres_virtual) {
279                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
280                          __func__, var->xres, var->yres);
281                 return -EINVAL;
282         }
283
284         /*
285          *  Memory limit
286          */
287
288         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
289                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
290                          __func__, var->yres_virtual);
291                 return -ENOMEM;
292         }
293
294         return 0;
295 }
296
297 static int bfin_t350mcqb_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
298 {
299         struct bfin_t350mcqbfb_info *fbi = info->par;
300
301         if (fbi->lq043_mmap)
302                 return -1;
303
304         spin_lock(&fbi->lock);
305         fbi->lq043_mmap = 1;
306         spin_unlock(&fbi->lock);
307
308         vma->vm_start = (unsigned long)(fbi->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET);
309
310         vma->vm_end = vma->vm_start + info->fix.smem_len;
311         /* For those who don't understand how mmap works, go read
312          *   Documentation/nommu-mmap.txt.
313          * For those that do, you will know that the VM_MAYSHARE flag
314          * must be set in the vma->vm_flags structure on noMMU
315          *   Other flags can be set, and are documented in
316          *   include/linux/mm.h
317          */
318         vma->vm_flags |= VM_MAYSHARE | VM_SHARED;
319
320         return 0;
321 }
322
323 int bfin_t350mcqb_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
324 {
325         if (nocursor)
326                 return 0;
327         else
328                 return -EINVAL; /* just to force soft_cursor() call */
329 }
330
331 static int bfin_t350mcqb_fb_setcolreg(u_int regno, u_int red, u_int green,
332                                    u_int blue, u_int transp,
333                                    struct fb_info *info)
334 {
335         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
336                 return -EINVAL;
337
338         if (info->var.grayscale) {
339                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
340                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
341         }
342
343         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
344
345                 u32 value;
346                 /* Place color in the pseudopalette */
347                 if (regno > 16)
348                         return -EINVAL;
349
350                 red >>= (16 - info->var.red.length);
351                 green >>= (16 - info->var.green.length);
352                 blue >>= (16 - info->var.blue.length);
353
354                 value = (red << info->var.red.offset) |
355                     (green << info->var.green.offset) |
356                     (blue << info->var.blue.offset);
357                 value &= 0xFFFFFF;
358
359                 ((u32 *) (info->pseudo_palette))[regno] = value;
360
361         }
362
363         return 0;
364 }
365
366 static struct fb_ops bfin_t350mcqb_fb_ops = {
367         .owner = THIS_MODULE,
368         .fb_open = bfin_t350mcqb_fb_open,
369         .fb_release = bfin_t350mcqb_fb_release,
370         .fb_check_var = bfin_t350mcqb_fb_check_var,
371         .fb_fillrect = cfb_fillrect,
372         .fb_copyarea = cfb_copyarea,
373         .fb_imageblit = cfb_imageblit,
374         .fb_mmap = bfin_t350mcqb_fb_mmap,
375         .fb_cursor = bfin_t350mcqb_fb_cursor,
376         .fb_setcolreg = bfin_t350mcqb_fb_setcolreg,
377 };
378
379 #ifndef NO_BL_SUPPORT
380 static int bl_get_brightness(struct backlight_device *bd)
381 {
382         return 0;
383 }
384
385 static struct backlight_ops bfin_lq043fb_bl_ops = {
386         .get_brightness = bl_get_brightness,
387 };
388
389 static struct backlight_device *bl_dev;
390
391 static int bfin_lcd_get_power(struct lcd_device *dev)
392 {
393         return 0;
394 }
395
396 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
397 {
398         return 0;
399 }
400
401 static int bfin_lcd_get_contrast(struct lcd_device *dev)
402 {
403         return 0;
404 }
405
406 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
407 {
408
409         return 0;
410 }
411
412 static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
413 {
414         if (!fi || (fi == &bfin_t350mcqb_fb))
415                 return 1;
416         return 0;
417 }
418
419 static struct lcd_ops bfin_lcd_ops = {
420         .get_power = bfin_lcd_get_power,
421         .set_power = bfin_lcd_set_power,
422         .get_contrast = bfin_lcd_get_contrast,
423         .set_contrast = bfin_lcd_set_contrast,
424         .check_fb = bfin_lcd_check_fb,
425 };
426
427 static struct lcd_device *lcd_dev;
428 #endif
429
430 static irqreturn_t bfin_t350mcqb_irq_error(int irq, void *dev_id)
431 {
432         /*struct bfin_t350mcqbfb_info *info = (struct bfin_t350mcqbfb_info *)dev_id;*/
433
434         u16 status = bfin_read_PPI_STATUS();
435         bfin_write_PPI_STATUS(0xFFFF);
436
437         if (status) {
438                 bfin_t350mcqb_disable_ppi();
439                 disable_dma(CH_PPI);
440
441                 /* start dma */
442                 enable_dma(CH_PPI);
443                 bfin_t350mcqb_enable_ppi();
444                 bfin_write_PPI_STATUS(0xFFFF);
445         }
446
447         return IRQ_HANDLED;
448 }
449
450 static int __devinit bfin_t350mcqb_probe(struct platform_device *pdev)
451 {
452         struct bfin_t350mcqbfb_info *info;
453         struct fb_info *fbinfo;
454         int ret;
455
456         printk(KERN_INFO DRIVER_NAME ": %dx%d %d-bit RGB FrameBuffer initializing...\n",
457                                          LCD_X_RES, LCD_Y_RES, LCD_BPP);
458
459         if (request_dma(CH_PPI, "CH_PPI") < 0) {
460                 printk(KERN_ERR DRIVER_NAME
461                        ": couldn't request CH_PPI DMA\n");
462                 ret = -EFAULT;
463                 goto out1;
464         }
465
466         fbinfo =
467             framebuffer_alloc(sizeof(struct bfin_t350mcqbfb_info), &pdev->dev);
468         if (!fbinfo) {
469                 ret = -ENOMEM;
470                 goto out2;
471         }
472
473         info = fbinfo->par;
474         info->fb = fbinfo;
475         info->dev = &pdev->dev;
476
477         platform_set_drvdata(pdev, fbinfo);
478
479         strcpy(fbinfo->fix.id, driver_name);
480
481         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
482         fbinfo->fix.type_aux = 0;
483         fbinfo->fix.xpanstep = 0;
484         fbinfo->fix.ypanstep = 0;
485         fbinfo->fix.ywrapstep = 0;
486         fbinfo->fix.accel = FB_ACCEL_NONE;
487         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
488
489         fbinfo->var.nonstd = 0;
490         fbinfo->var.activate = FB_ACTIVATE_NOW;
491         fbinfo->var.height = -1;
492         fbinfo->var.width = -1;
493         fbinfo->var.accel_flags = 0;
494         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
495
496         fbinfo->var.xres = LCD_X_RES;
497         fbinfo->var.xres_virtual = LCD_X_RES;
498         fbinfo->var.yres = LCD_Y_RES;
499         fbinfo->var.yres_virtual = LCD_Y_RES;
500         fbinfo->var.bits_per_pixel = LCD_BPP;
501
502         fbinfo->var.red.offset = 0;
503         fbinfo->var.green.offset = 8;
504         fbinfo->var.blue.offset = 16;
505         fbinfo->var.transp.offset = 0;
506         fbinfo->var.red.length = 8;
507         fbinfo->var.green.length = 8;
508         fbinfo->var.blue.length = 8;
509         fbinfo->var.transp.length = 0;
510         fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * LCD_BPP / 8;
511
512         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
513             fbinfo->var.bits_per_pixel / 8;
514
515
516         fbinfo->fbops = &bfin_t350mcqb_fb_ops;
517         fbinfo->flags = FBINFO_FLAG_DEFAULT;
518
519         info->fb_buffer =
520             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
521                                GFP_KERNEL);
522
523         if (NULL == info->fb_buffer) {
524                 printk(KERN_ERR DRIVER_NAME
525                        ": couldn't allocate dma buffer.\n");
526                 ret = -ENOMEM;
527                 goto out3;
528         }
529
530         memset(info->fb_buffer, 0, fbinfo->fix.smem_len);
531
532         fbinfo->screen_base = (void *)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
533         fbinfo->fix.smem_start = (int)info->fb_buffer + ACTIVE_VIDEO_MEM_OFFSET;
534
535         fbinfo->fbops = &bfin_t350mcqb_fb_ops;
536
537         fbinfo->pseudo_palette = &info->pseudo_pal;
538
539         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
540             < 0) {
541                 printk(KERN_ERR DRIVER_NAME
542                        "Fail to allocate colormap (%d entries)\n",
543                        BFIN_LCD_NBR_PALETTE_ENTRIES);
544                 ret = -EFAULT;
545                 goto out4;
546         }
547
548         if (bfin_t350mcqb_request_ports(1)) {
549                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
550                 ret = -EFAULT;
551                 goto out6;
552         }
553
554         info->irq = platform_get_irq(pdev, 0);
555         if (info->irq < 0) {
556                 ret = -EINVAL;
557                 goto out7;
558         }
559
560         ret = request_irq(info->irq, bfin_t350mcqb_irq_error, IRQF_DISABLED,
561                         "PPI ERROR", info);
562         if (ret < 0) {
563                 printk(KERN_ERR DRIVER_NAME
564                        ": unable to request PPI ERROR IRQ\n");
565                 goto out7;
566         }
567
568         if (register_framebuffer(fbinfo) < 0) {
569                 printk(KERN_ERR DRIVER_NAME
570                        ": unable to register framebuffer.\n");
571                 ret = -EINVAL;
572                 goto out8;
573         }
574 #ifndef NO_BL_SUPPORT
575         bl_dev =
576             backlight_device_register("bf52x-bl", NULL, NULL,
577                                       &bfin_lq043fb_bl_ops);
578         bl_dev->props.max_brightness = 255;
579
580         lcd_dev = lcd_device_register(DRIVER_NAME, NULL, &bfin_lcd_ops);
581         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
582 #endif
583
584         return 0;
585
586 out8:
587         free_irq(info->irq, info);
588 out7:
589         bfin_t350mcqb_request_ports(0);
590 out6:
591         fb_dealloc_cmap(&fbinfo->cmap);
592 out4:
593         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
594                           info->dma_handle);
595 out3:
596         framebuffer_release(fbinfo);
597 out2:
598         free_dma(CH_PPI);
599 out1:
600         platform_set_drvdata(pdev, NULL);
601
602         return ret;
603 }
604
605 static int bfin_t350mcqb_remove(struct platform_device *pdev)
606 {
607
608         struct fb_info *fbinfo = platform_get_drvdata(pdev);
609         struct bfin_t350mcqbfb_info *info = fbinfo->par;
610
611         unregister_framebuffer(fbinfo);
612
613         free_dma(CH_PPI);
614         free_irq(info->irq, info);
615
616         if (info->fb_buffer != NULL)
617                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
618                                   info->dma_handle);
619
620         fb_dealloc_cmap(&fbinfo->cmap);
621
622 #ifndef NO_BL_SUPPORT
623         lcd_device_unregister(lcd_dev);
624         backlight_device_unregister(bl_dev);
625 #endif
626
627         bfin_t350mcqb_request_ports(0);
628
629         platform_set_drvdata(pdev, NULL);
630         framebuffer_release(fbinfo);
631
632         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
633
634         return 0;
635 }
636
637 #ifdef CONFIG_PM
638 static int bfin_t350mcqb_suspend(struct platform_device *pdev, pm_message_t state)
639 {
640         struct fb_info *fbinfo = platform_get_drvdata(pdev);
641         struct bfin_t350mcqbfb_info *info = fbinfo->par;
642
643         bfin_t350mcqb_disable_ppi();
644         disable_dma(CH_PPI);
645         bfin_write_PPI_STATUS(0xFFFF);
646
647         return 0;
648 }
649
650 static int bfin_t350mcqb_resume(struct platform_device *pdev)
651 {
652         struct fb_info *fbinfo = platform_get_drvdata(pdev);
653         struct bfin_t350mcqbfb_info *info = fbinfo->par;
654
655         enable_dma(CH_PPI);
656         bfin_t350mcqb_enable_ppi();
657
658         return 0;
659 }
660 #else
661 #define bfin_t350mcqb_suspend   NULL
662 #define bfin_t350mcqb_resume    NULL
663 #endif
664
665 static struct platform_driver bfin_t350mcqb_driver = {
666         .probe = bfin_t350mcqb_probe,
667         .remove = bfin_t350mcqb_remove,
668         .suspend = bfin_t350mcqb_suspend,
669         .resume = bfin_t350mcqb_resume,
670         .driver = {
671                    .name = DRIVER_NAME,
672                    .owner = THIS_MODULE,
673                    },
674 };
675
676 static int __devinit bfin_t350mcqb_driver_init(void)
677 {
678         return platform_driver_register(&bfin_t350mcqb_driver);
679 }
680
681 static void __exit bfin_t350mcqb_driver_cleanup(void)
682 {
683         platform_driver_unregister(&bfin_t350mcqb_driver);
684 }
685
686 MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
687 MODULE_LICENSE("GPL");
688
689 module_init(bfin_t350mcqb_driver_init);
690 module_exit(bfin_t350mcqb_driver_cleanup);