media: ov5640: Add Omnivision OV5640 support
[linux-2.6.git] / drivers / video / bf54x-lq043fb.c
1 /*
2  * File:         drivers/video/bf54x-lq043.c
3  * Based on:
4  * Author:       Michael Hennerich <hennerich@blackfin.uclinux.org>
5  *
6  * Created:
7  * Description:  ADSP-BF54x Framebufer driver
8  *
9  *
10  * Modified:
11  *               Copyright 2007-2008 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/mm.h>
36 #include <linux/tty.h>
37 #include <linux/slab.h>
38 #include <linux/delay.h>
39 #include <linux/fb.h>
40 #include <linux/ioport.h>
41 #include <linux/init.h>
42 #include <linux/types.h>
43 #include <linux/interrupt.h>
44 #include <linux/sched.h>
45 #include <linux/timer.h>
46 #include <linux/device.h>
47 #include <linux/backlight.h>
48 #include <linux/lcd.h>
49 #include <linux/spinlock.h>
50 #include <linux/dma-mapping.h>
51 #include <linux/platform_device.h>
52
53 #include <asm/blackfin.h>
54 #include <asm/irq.h>
55 #include <asm/dpmc.h>
56 #include <asm/dma-mapping.h>
57 #include <asm/dma.h>
58 #include <asm/gpio.h>
59 #include <asm/portmux.h>
60
61 #include <mach/bf54x-lq043.h>
62
63 #define NO_BL_SUPPORT
64
65 #define DRIVER_NAME "bf54x-lq043"
66 static char driver_name[] = DRIVER_NAME;
67
68 #define BFIN_LCD_NBR_PALETTE_ENTRIES    256
69
70 #define EPPI0_18 {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2, P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3, \
71  P_PPI0_D4, P_PPI0_D5, P_PPI0_D6, P_PPI0_D7, P_PPI0_D8, P_PPI0_D9, P_PPI0_D10, \
72  P_PPI0_D11, P_PPI0_D12, P_PPI0_D13, P_PPI0_D14, P_PPI0_D15, P_PPI0_D16, P_PPI0_D17, 0}
73
74 #define EPPI0_24 {P_PPI0_D18, P_PPI0_D19, P_PPI0_D20, P_PPI0_D21, P_PPI0_D22, P_PPI0_D23, 0}
75
76 struct bfin_bf54xfb_info {
77         struct fb_info *fb;
78         struct device *dev;
79
80         struct bfin_bf54xfb_mach_info *mach_info;
81
82         unsigned char *fb_buffer;       /* RGB Buffer */
83
84         dma_addr_t dma_handle;
85         int lq043_open_cnt;
86         int irq;
87         spinlock_t lock;        /* lock */
88 };
89
90 static int nocursor;
91 module_param(nocursor, int, 0644);
92 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
93
94 static int outp_rgb666;
95 module_param(outp_rgb666, int, 0);
96 MODULE_PARM_DESC(outp_rgb666, "Output 18-bit RGB666");
97
98 #define LCD_X_RES               480     /*Horizontal Resolution */
99 #define LCD_Y_RES               272     /* Vertical Resolution */
100
101 #define LCD_BPP                 24      /* Bit Per Pixel */
102 #define DMA_BUS_SIZE            32
103
104 /*      -- Horizontal synchronizing --
105  *
106  * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
107  * (LCY-W-06602A Page 9 of 22)
108  *
109  * Clock Frequency      1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
110  *
111  * Period               TH - 525 - Clock
112  * Pulse width          THp - 41 - Clock
113  * Horizontal period    THd - 480 - Clock
114  * Back porch           THb - 2 - Clock
115  * Front porch          THf - 2 - Clock
116  *
117  * -- Vertical synchronizing --
118  * Period               TV - 286 - Line
119  * Pulse width          TVp - 10 - Line
120  * Vertical period      TVd - 272 - Line
121  * Back porch           TVb - 2 - Line
122  * Front porch          TVf - 2 - Line
123  */
124
125 #define LCD_CLK                 (8*1000*1000)   /* 8MHz */
126
127 /* # active data to transfer after Horizontal Delay clock */
128 #define EPPI_HCOUNT             LCD_X_RES
129
130 /* # active lines to transfer after Vertical Delay clock */
131 #define EPPI_VCOUNT             LCD_Y_RES
132
133 /* Samples per Line = 480 (active data) + 45 (padding) */
134 #define EPPI_LINE               525
135
136 /* Lines per Frame = 272 (active data) + 14 (padding) */
137 #define EPPI_FRAME              286
138
139 /* FS1 (Hsync) Width (Typical)*/
140 #define EPPI_FS1W_HBL           41
141
142 /* FS1 (Hsync) Period (Typical) */
143 #define EPPI_FS1P_AVPL          EPPI_LINE
144
145 /* Horizontal Delay clock after assertion of Hsync (Typical) */
146 #define EPPI_HDELAY             43
147
148 /* FS2 (Vsync) Width    = FS1 (Hsync) Period * 10 */
149 #define EPPI_FS2W_LVB           (EPPI_LINE * 10)
150
151  /* FS2 (Vsync) Period   = FS1 (Hsync) Period * Lines per Frame */
152 #define EPPI_FS2P_LAVF          (EPPI_LINE * EPPI_FRAME)
153
154 /* Vertical Delay after assertion of Vsync (2 Lines) */
155 #define EPPI_VDELAY             12
156
157 #define EPPI_CLIP               0xFF00FF00
158
159 /* EPPI Control register configuration value for RGB out
160  * - EPPI as Output
161  * GP 2 frame sync mode,
162  * Internal Clock generation disabled, Internal FS generation enabled,
163  * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
164  * FS1 & FS2 are active high,
165  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
166  * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
167  * Swapping Enabled,
168  * One (DMA) Channel Mode,
169  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
170  * Regular watermark - when FIFO is 100% full,
171  * Urgent watermark - when FIFO is 75% full
172  */
173
174 #define EPPI_CONTROL            (0x20136E2E | SWAPEN)
175
176 static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
177 {
178         u32 sclk = get_sclk();
179
180         /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */
181
182         return (((sclk / target_ppi_clk) / 2) - 1);
183 }
184
185 static void config_ppi(struct bfin_bf54xfb_info *fbi)
186 {
187
188         u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);
189
190         bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
191         bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
192         bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
193         bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
194         bfin_write_EPPI0_CLIP(EPPI_CLIP);
195
196         bfin_write_EPPI0_FRAME(EPPI_FRAME);
197         bfin_write_EPPI0_LINE(EPPI_LINE);
198
199         bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
200         bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
201         bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
202         bfin_write_EPPI0_VDELAY(EPPI_VDELAY);
203
204         bfin_write_EPPI0_CLKDIV(eppi_clkdiv);
205
206 /*
207  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
208  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
209  */
210         if (outp_rgb666)
211                 bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 |
212                                          RGB_FMT_EN);
213         else
214                 bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) &
215                                          ~RGB_FMT_EN);
216
217
218 }
219
220 static int config_dma(struct bfin_bf54xfb_info *fbi)
221 {
222
223         set_dma_config(CH_EPPI0,
224                        set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
225                                            INTR_DISABLE, DIMENSION_2D,
226                                            DATA_SIZE_32,
227                                            DMA_NOSYNC_KEEP_DMA_BUF));
228         set_dma_x_count(CH_EPPI0, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
229         set_dma_x_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
230         set_dma_y_count(CH_EPPI0, LCD_Y_RES);
231         set_dma_y_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
232         set_dma_start_addr(CH_EPPI0, (unsigned long)fbi->fb_buffer);
233
234         return 0;
235 }
236
237 static int request_ports(struct bfin_bf54xfb_info *fbi)
238 {
239
240         u16 eppi_req_18[] = EPPI0_18;
241         u16 disp = fbi->mach_info->disp;
242
243         if (gpio_request(disp, DRIVER_NAME)) {
244                 printk(KERN_ERR "Requesting GPIO %d failed\n", disp);
245                 return -EFAULT;
246         }
247
248         if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {
249                 printk(KERN_ERR "Requesting Peripherals failed\n");
250                 gpio_free(disp);
251                 return -EFAULT;
252         }
253
254         if (!outp_rgb666) {
255
256                 u16 eppi_req_24[] = EPPI0_24;
257
258                 if (peripheral_request_list(eppi_req_24, DRIVER_NAME)) {
259                         printk(KERN_ERR "Requesting Peripherals failed\n");
260                         peripheral_free_list(eppi_req_18);
261                         gpio_free(disp);
262                         return -EFAULT;
263                 }
264         }
265
266         gpio_direction_output(disp, 1);
267
268         return 0;
269 }
270
271 static void free_ports(struct bfin_bf54xfb_info *fbi)
272 {
273
274         u16 eppi_req_18[] = EPPI0_18;
275
276         gpio_free(fbi->mach_info->disp);
277
278         peripheral_free_list(eppi_req_18);
279
280         if (!outp_rgb666) {
281                 u16 eppi_req_24[] = EPPI0_24;
282                 peripheral_free_list(eppi_req_24);
283         }
284 }
285
286 static int bfin_bf54x_fb_open(struct fb_info *info, int user)
287 {
288         struct bfin_bf54xfb_info *fbi = info->par;
289
290         spin_lock(&fbi->lock);
291         fbi->lq043_open_cnt++;
292
293         if (fbi->lq043_open_cnt <= 1) {
294
295                 bfin_write_EPPI0_CONTROL(0);
296                 SSYNC();
297
298                 config_dma(fbi);
299                 config_ppi(fbi);
300
301                 /* start dma */
302                 enable_dma(CH_EPPI0);
303                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
304         }
305
306         spin_unlock(&fbi->lock);
307
308         return 0;
309 }
310
311 static int bfin_bf54x_fb_release(struct fb_info *info, int user)
312 {
313         struct bfin_bf54xfb_info *fbi = info->par;
314
315         spin_lock(&fbi->lock);
316
317         fbi->lq043_open_cnt--;
318
319         if (fbi->lq043_open_cnt <= 0) {
320
321                 bfin_write_EPPI0_CONTROL(0);
322                 SSYNC();
323                 disable_dma(CH_EPPI0);
324         }
325
326         spin_unlock(&fbi->lock);
327
328         return 0;
329 }
330
331 static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
332                                    struct fb_info *info)
333 {
334
335         switch (var->bits_per_pixel) {
336         case 24:/* TRUECOLOUR, 16m */
337                 var->red.offset = 16;
338                 var->green.offset = 8;
339                 var->blue.offset = 0;
340                 var->red.length = var->green.length = var->blue.length = 8;
341                 var->transp.offset = 0;
342                 var->transp.length = 0;
343                 var->transp.msb_right = 0;
344                 var->red.msb_right = 0;
345                 var->green.msb_right = 0;
346                 var->blue.msb_right = 0;
347                 break;
348         default:
349                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
350                          var->bits_per_pixel);
351                 return -EINVAL;
352         }
353
354         if (info->var.xres != var->xres || info->var.yres != var->yres ||
355             info->var.xres_virtual != var->xres_virtual ||
356             info->var.yres_virtual != var->yres_virtual) {
357                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
358                          __func__, var->xres, var->yres);
359                 return -EINVAL;
360         }
361
362         /*
363          *  Memory limit
364          */
365
366         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
367                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
368                          __func__, var->yres_virtual);
369                 return -ENOMEM;
370         }
371
372         return 0;
373 }
374
375 int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
376 {
377         if (nocursor)
378                 return 0;
379         else
380                 return -EINVAL; /* just to force soft_cursor() call */
381 }
382
383 static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
384                                    u_int blue, u_int transp,
385                                    struct fb_info *info)
386 {
387         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
388                 return -EINVAL;
389
390         if (info->var.grayscale) {
391                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
392                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
393         }
394
395         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
396
397                 u32 value;
398                 /* Place color in the pseudopalette */
399                 if (regno > 16)
400                         return -EINVAL;
401
402                 red >>= (16 - info->var.red.length);
403                 green >>= (16 - info->var.green.length);
404                 blue >>= (16 - info->var.blue.length);
405
406                 value = (red << info->var.red.offset) |
407                     (green << info->var.green.offset) |
408                     (blue << info->var.blue.offset);
409                 value &= 0xFFFFFF;
410
411                 ((u32 *) (info->pseudo_palette))[regno] = value;
412
413         }
414
415         return 0;
416 }
417
418 static struct fb_ops bfin_bf54x_fb_ops = {
419         .owner = THIS_MODULE,
420         .fb_open = bfin_bf54x_fb_open,
421         .fb_release = bfin_bf54x_fb_release,
422         .fb_check_var = bfin_bf54x_fb_check_var,
423         .fb_fillrect = cfb_fillrect,
424         .fb_copyarea = cfb_copyarea,
425         .fb_imageblit = cfb_imageblit,
426         .fb_cursor = bfin_bf54x_fb_cursor,
427         .fb_setcolreg = bfin_bf54x_fb_setcolreg,
428 };
429
430 #ifndef NO_BL_SUPPORT
431 static int bl_get_brightness(struct backlight_device *bd)
432 {
433         return 0;
434 }
435
436 static const struct backlight_ops bfin_lq043fb_bl_ops = {
437         .get_brightness = bl_get_brightness,
438 };
439
440 static struct backlight_device *bl_dev;
441
442 static int bfin_lcd_get_power(struct lcd_device *dev)
443 {
444         return 0;
445 }
446
447 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
448 {
449         return 0;
450 }
451
452 static int bfin_lcd_get_contrast(struct lcd_device *dev)
453 {
454         return 0;
455 }
456
457 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
458 {
459
460         return 0;
461 }
462
463 static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
464 {
465         if (!fi || (fi == &bfin_bf54x_fb))
466                 return 1;
467         return 0;
468 }
469
470 static struct lcd_ops bfin_lcd_ops = {
471         .get_power = bfin_lcd_get_power,
472         .set_power = bfin_lcd_set_power,
473         .get_contrast = bfin_lcd_get_contrast,
474         .set_contrast = bfin_lcd_set_contrast,
475         .check_fb = bfin_lcd_check_fb,
476 };
477
478 static struct lcd_device *lcd_dev;
479 #endif
480
481 static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
482 {
483         /*struct bfin_bf54xfb_info *info = dev_id;*/
484
485         u16 status = bfin_read_EPPI0_STATUS();
486
487         bfin_write_EPPI0_STATUS(0xFFFF);
488
489         if (status) {
490                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
491                 disable_dma(CH_EPPI0);
492
493                 /* start dma */
494                 enable_dma(CH_EPPI0);
495                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
496                 bfin_write_EPPI0_STATUS(0xFFFF);
497         }
498
499         return IRQ_HANDLED;
500 }
501
502 static int __devinit bfin_bf54x_probe(struct platform_device *pdev)
503 {
504 #ifndef NO_BL_SUPPORT
505         struct backlight_properties props;
506 #endif
507         struct bfin_bf54xfb_info *info;
508         struct fb_info *fbinfo;
509         int ret;
510
511         printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
512
513         if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
514                 printk(KERN_ERR DRIVER_NAME
515                        ": couldn't request CH_EPPI0 DMA\n");
516                 ret = -EFAULT;
517                 goto out1;
518         }
519
520         fbinfo =
521             framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
522         if (!fbinfo) {
523                 ret = -ENOMEM;
524                 goto out2;
525         }
526
527         info = fbinfo->par;
528         info->fb = fbinfo;
529         info->dev = &pdev->dev;
530
531         platform_set_drvdata(pdev, fbinfo);
532
533         strcpy(fbinfo->fix.id, driver_name);
534
535         info->mach_info = pdev->dev.platform_data;
536
537         if (info->mach_info == NULL) {
538                 dev_err(&pdev->dev,
539                         "no platform data for lcd, cannot attach\n");
540                 ret = -EINVAL;
541                 goto out3;
542         }
543
544         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
545         fbinfo->fix.type_aux = 0;
546         fbinfo->fix.xpanstep = 0;
547         fbinfo->fix.ypanstep = 0;
548         fbinfo->fix.ywrapstep = 0;
549         fbinfo->fix.accel = FB_ACCEL_NONE;
550         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
551
552         fbinfo->var.nonstd = 0;
553         fbinfo->var.activate = FB_ACTIVATE_NOW;
554         fbinfo->var.height = info->mach_info->height;
555         fbinfo->var.width = info->mach_info->width;
556         fbinfo->var.accel_flags = 0;
557         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
558
559         fbinfo->fbops = &bfin_bf54x_fb_ops;
560         fbinfo->flags = FBINFO_FLAG_DEFAULT;
561
562         fbinfo->var.xres = info->mach_info->xres.defval;
563         fbinfo->var.xres_virtual = info->mach_info->xres.defval;
564         fbinfo->var.yres = info->mach_info->yres.defval;
565         fbinfo->var.yres_virtual = info->mach_info->yres.defval;
566         fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
567
568         fbinfo->var.upper_margin = 0;
569         fbinfo->var.lower_margin = 0;
570         fbinfo->var.vsync_len = 0;
571
572         fbinfo->var.left_margin = 0;
573         fbinfo->var.right_margin = 0;
574         fbinfo->var.hsync_len = 0;
575
576         fbinfo->var.red.offset = 16;
577         fbinfo->var.green.offset = 8;
578         fbinfo->var.blue.offset = 0;
579         fbinfo->var.transp.offset = 0;
580         fbinfo->var.red.length = 8;
581         fbinfo->var.green.length = 8;
582         fbinfo->var.blue.length = 8;
583         fbinfo->var.transp.length = 0;
584         fbinfo->fix.smem_len = info->mach_info->xres.max *
585             info->mach_info->yres.max * info->mach_info->bpp.max / 8;
586
587         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
588             fbinfo->var.bits_per_pixel / 8;
589
590         info->fb_buffer =
591             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
592                                GFP_KERNEL);
593
594         if (NULL == info->fb_buffer) {
595                 printk(KERN_ERR DRIVER_NAME
596                        ": couldn't allocate dma buffer.\n");
597                 ret = -ENOMEM;
598                 goto out3;
599         }
600
601         fbinfo->screen_base = (void *)info->fb_buffer;
602         fbinfo->fix.smem_start = (int)info->fb_buffer;
603
604         fbinfo->fbops = &bfin_bf54x_fb_ops;
605
606         fbinfo->pseudo_palette = kzalloc(sizeof(u32) * 16, GFP_KERNEL);
607         if (!fbinfo->pseudo_palette) {
608                 printk(KERN_ERR DRIVER_NAME
609                        "Fail to allocate pseudo_palette\n");
610
611                 ret = -ENOMEM;
612                 goto out4;
613         }
614
615         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
616             < 0) {
617                 printk(KERN_ERR DRIVER_NAME
618                        "Fail to allocate colormap (%d entries)\n",
619                        BFIN_LCD_NBR_PALETTE_ENTRIES);
620                 ret = -EFAULT;
621                 goto out5;
622         }
623
624         if (request_ports(info)) {
625                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
626                 ret = -EFAULT;
627                 goto out6;
628         }
629
630         info->irq = platform_get_irq(pdev, 0);
631         if (info->irq < 0) {
632                 ret = -EINVAL;
633                 goto out7;
634         }
635
636         if (request_irq(info->irq, bfin_bf54x_irq_error, IRQF_DISABLED,
637                         "PPI ERROR", info) < 0) {
638                 printk(KERN_ERR DRIVER_NAME
639                        ": unable to request PPI ERROR IRQ\n");
640                 ret = -EFAULT;
641                 goto out7;
642         }
643
644         if (register_framebuffer(fbinfo) < 0) {
645                 printk(KERN_ERR DRIVER_NAME
646                        ": unable to register framebuffer.\n");
647                 ret = -EINVAL;
648                 goto out8;
649         }
650 #ifndef NO_BL_SUPPORT
651         memset(&props, 0, sizeof(struct backlight_properties));
652         props.type = BACKLIGHT_RAW;
653         props.max_brightness = 255;
654         bl_dev = backlight_device_register("bf54x-bl", NULL, NULL,
655                                            &bfin_lq043fb_bl_ops, &props);
656         if (IS_ERR(bl_dev)) {
657                 printk(KERN_ERR DRIVER_NAME
658                         ": unable to register backlight.\n");
659                 ret = -EINVAL;
660                 unregister_framebuffer(fbinfo);
661                 goto out8;
662         }
663
664         lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);
665         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
666 #endif
667
668         return 0;
669
670 out8:
671         free_irq(info->irq, info);
672 out7:
673         free_ports(info);
674 out6:
675         fb_dealloc_cmap(&fbinfo->cmap);
676 out5:
677         kfree(fbinfo->pseudo_palette);
678 out4:
679         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
680                           info->dma_handle);
681 out3:
682         framebuffer_release(fbinfo);
683 out2:
684         free_dma(CH_EPPI0);
685 out1:
686         platform_set_drvdata(pdev, NULL);
687
688         return ret;
689 }
690
691 static int __devexit bfin_bf54x_remove(struct platform_device *pdev)
692 {
693
694         struct fb_info *fbinfo = platform_get_drvdata(pdev);
695         struct bfin_bf54xfb_info *info = fbinfo->par;
696
697         free_dma(CH_EPPI0);
698         free_irq(info->irq, info);
699
700         if (info->fb_buffer != NULL)
701                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
702                                   info->dma_handle);
703
704         kfree(fbinfo->pseudo_palette);
705         fb_dealloc_cmap(&fbinfo->cmap);
706
707 #ifndef NO_BL_SUPPORT
708         lcd_device_unregister(lcd_dev);
709         backlight_device_unregister(bl_dev);
710 #endif
711
712         unregister_framebuffer(fbinfo);
713
714         free_ports(info);
715
716         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
717
718         return 0;
719 }
720
721 #ifdef CONFIG_PM
722 static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
723 {
724         struct fb_info *fbinfo = platform_get_drvdata(pdev);
725
726         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
727         disable_dma(CH_EPPI0);
728         bfin_write_EPPI0_STATUS(0xFFFF);
729
730         return 0;
731 }
732
733 static int bfin_bf54x_resume(struct platform_device *pdev)
734 {
735         struct fb_info *fbinfo = platform_get_drvdata(pdev);
736         struct bfin_bf54xfb_info *info = fbinfo->par;
737
738         if (info->lq043_open_cnt) {
739
740                 bfin_write_EPPI0_CONTROL(0);
741                 SSYNC();
742
743                 config_dma(info);
744                 config_ppi(info);
745
746                 /* start dma */
747                 enable_dma(CH_EPPI0);
748                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
749         }
750
751         return 0;
752 }
753 #else
754 #define bfin_bf54x_suspend      NULL
755 #define bfin_bf54x_resume       NULL
756 #endif
757
758 static struct platform_driver bfin_bf54x_driver = {
759         .probe = bfin_bf54x_probe,
760         .remove = __devexit_p(bfin_bf54x_remove),
761         .suspend = bfin_bf54x_suspend,
762         .resume = bfin_bf54x_resume,
763         .driver = {
764                    .name = DRIVER_NAME,
765                    .owner = THIS_MODULE,
766                    },
767 };
768
769 static int __init bfin_bf54x_driver_init(void)
770 {
771         return platform_driver_register(&bfin_bf54x_driver);
772 }
773
774 static void __exit bfin_bf54x_driver_cleanup(void)
775 {
776         platform_driver_unregister(&bfin_bf54x_driver);
777 }
778
779 MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
780 MODULE_LICENSE("GPL");
781
782 module_init(bfin_bf54x_driver_init);
783 module_exit(bfin_bf54x_driver_cleanup);