8aa67dea06db54e50110f3c8d5aacae82486626d
[sfrench/cifs-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_mmap;
86         int lq043_open_cnt;
87         int irq;
88         spinlock_t lock;        /* lock */
89 };
90
91 static int nocursor;
92 module_param(nocursor, int, 0644);
93 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
94
95 static int outp_rgb666;
96 module_param(outp_rgb666, int, 0);
97 MODULE_PARM_DESC(outp_rgb666, "Output 18-bit RGB666");
98
99 #define LCD_X_RES               480     /*Horizontal Resolution */
100 #define LCD_Y_RES               272     /* Vertical Resolution */
101
102 #define LCD_BPP                 24      /* Bit Per Pixel */
103 #define DMA_BUS_SIZE            32
104
105 /*      -- Horizontal synchronizing --
106  *
107  * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
108  * (LCY-W-06602A Page 9 of 22)
109  *
110  * Clock Frequency      1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
111  *
112  * Period               TH - 525 - Clock
113  * Pulse width          THp - 41 - Clock
114  * Horizontal period    THd - 480 - Clock
115  * Back porch           THb - 2 - Clock
116  * Front porch          THf - 2 - Clock
117  *
118  * -- Vertical synchronizing --
119  * Period               TV - 286 - Line
120  * Pulse width          TVp - 10 - Line
121  * Vertical period      TVd - 272 - Line
122  * Back porch           TVb - 2 - Line
123  * Front porch          TVf - 2 - Line
124  */
125
126 #define LCD_CLK                 (8*1000*1000)   /* 8MHz */
127
128 /* # active data to transfer after Horizontal Delay clock */
129 #define EPPI_HCOUNT             LCD_X_RES
130
131 /* # active lines to transfer after Vertical Delay clock */
132 #define EPPI_VCOUNT             LCD_Y_RES
133
134 /* Samples per Line = 480 (active data) + 45 (padding) */
135 #define EPPI_LINE               525
136
137 /* Lines per Frame = 272 (active data) + 14 (padding) */
138 #define EPPI_FRAME              286
139
140 /* FS1 (Hsync) Width (Typical)*/
141 #define EPPI_FS1W_HBL           41
142
143 /* FS1 (Hsync) Period (Typical) */
144 #define EPPI_FS1P_AVPL          EPPI_LINE
145
146 /* Horizontal Delay clock after assertion of Hsync (Typical) */
147 #define EPPI_HDELAY             43
148
149 /* FS2 (Vsync) Width    = FS1 (Hsync) Period * 10 */
150 #define EPPI_FS2W_LVB           (EPPI_LINE * 10)
151
152  /* FS2 (Vsync) Period   = FS1 (Hsync) Period * Lines per Frame */
153 #define EPPI_FS2P_LAVF          (EPPI_LINE * EPPI_FRAME)
154
155 /* Vertical Delay after assertion of Vsync (2 Lines) */
156 #define EPPI_VDELAY             12
157
158 #define EPPI_CLIP               0xFF00FF00
159
160 /* EPPI Control register configuration value for RGB out
161  * - EPPI as Output
162  * GP 2 frame sync mode,
163  * Internal Clock generation disabled, Internal FS generation enabled,
164  * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
165  * FS1 & FS2 are active high,
166  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
167  * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
168  * Swapping Enabled,
169  * One (DMA) Channel Mode,
170  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
171  * Regular watermark - when FIFO is 100% full,
172  * Urgent watermark - when FIFO is 75% full
173  */
174
175 #define EPPI_CONTROL            (0x20136E2E | SWAPEN)
176
177 static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
178 {
179         u32 sclk = get_sclk();
180
181         /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */
182
183         return (((sclk / target_ppi_clk) / 2) - 1);
184 }
185
186 static void config_ppi(struct bfin_bf54xfb_info *fbi)
187 {
188
189         u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);
190
191         bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
192         bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
193         bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
194         bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
195         bfin_write_EPPI0_CLIP(EPPI_CLIP);
196
197         bfin_write_EPPI0_FRAME(EPPI_FRAME);
198         bfin_write_EPPI0_LINE(EPPI_LINE);
199
200         bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
201         bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
202         bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
203         bfin_write_EPPI0_VDELAY(EPPI_VDELAY);
204
205         bfin_write_EPPI0_CLKDIV(eppi_clkdiv);
206
207 /*
208  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
209  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
210  */
211         if (outp_rgb666)
212                 bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 |
213                                          RGB_FMT_EN);
214         else
215                 bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) &
216                                          ~RGB_FMT_EN);
217
218
219 }
220
221 static int config_dma(struct bfin_bf54xfb_info *fbi)
222 {
223
224         set_dma_config(CH_EPPI0,
225                        set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
226                                            INTR_DISABLE, DIMENSION_2D,
227                                            DATA_SIZE_32,
228                                            DMA_NOSYNC_KEEP_DMA_BUF));
229         set_dma_x_count(CH_EPPI0, (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
230         set_dma_x_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
231         set_dma_y_count(CH_EPPI0, LCD_Y_RES);
232         set_dma_y_modify(CH_EPPI0, DMA_BUS_SIZE / 8);
233         set_dma_start_addr(CH_EPPI0, (unsigned long)fbi->fb_buffer);
234
235         return 0;
236 }
237
238 static int request_ports(struct bfin_bf54xfb_info *fbi)
239 {
240
241         u16 eppi_req_18[] = EPPI0_18;
242         u16 disp = fbi->mach_info->disp;
243
244         if (gpio_request(disp, DRIVER_NAME)) {
245                 printk(KERN_ERR "Requesting GPIO %d faild\n", disp);
246                 return -EFAULT;
247         }
248
249         if (peripheral_request_list(eppi_req_18, DRIVER_NAME)) {
250                 printk(KERN_ERR "Requesting Peripherals faild\n");
251                 gpio_free(disp);
252                 return -EFAULT;
253         }
254
255         if (!outp_rgb666) {
256
257                 u16 eppi_req_24[] = EPPI0_24;
258
259                 if (peripheral_request_list(eppi_req_24, DRIVER_NAME)) {
260                         printk(KERN_ERR "Requesting Peripherals faild\n");
261                         peripheral_free_list(eppi_req_18);
262                         gpio_free(disp);
263                         return -EFAULT;
264                 }
265         }
266
267         gpio_direction_output(disp, 1);
268
269         return 0;
270 }
271
272 static void free_ports(struct bfin_bf54xfb_info *fbi)
273 {
274
275         u16 eppi_req_18[] = EPPI0_18;
276
277         gpio_free(fbi->mach_info->disp);
278
279         peripheral_free_list(eppi_req_18);
280
281         if (!outp_rgb666) {
282                 u16 eppi_req_24[] = EPPI0_24;
283                 peripheral_free_list(eppi_req_24);
284         }
285 }
286
287 static int bfin_bf54x_fb_open(struct fb_info *info, int user)
288 {
289         struct bfin_bf54xfb_info *fbi = info->par;
290
291         spin_lock(&fbi->lock);
292         fbi->lq043_open_cnt++;
293
294         if (fbi->lq043_open_cnt <= 1) {
295
296                 bfin_write_EPPI0_CONTROL(0);
297                 SSYNC();
298
299                 config_dma(fbi);
300                 config_ppi(fbi);
301
302                 /* start dma */
303                 enable_dma(CH_EPPI0);
304                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
305         }
306
307         spin_unlock(&fbi->lock);
308
309         return 0;
310 }
311
312 static int bfin_bf54x_fb_release(struct fb_info *info, int user)
313 {
314         struct bfin_bf54xfb_info *fbi = info->par;
315
316         spin_lock(&fbi->lock);
317
318         fbi->lq043_open_cnt--;
319         fbi->lq043_mmap = 0;
320
321         if (fbi->lq043_open_cnt <= 0) {
322
323                 bfin_write_EPPI0_CONTROL(0);
324                 SSYNC();
325                 disable_dma(CH_EPPI0);
326         }
327
328         spin_unlock(&fbi->lock);
329
330         return 0;
331 }
332
333 static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
334                                    struct fb_info *info)
335 {
336
337         switch (var->bits_per_pixel) {
338         case 24:/* TRUECOLOUR, 16m */
339                 var->red.offset = 16;
340                 var->green.offset = 8;
341                 var->blue.offset = 0;
342                 var->red.length = var->green.length = var->blue.length = 8;
343                 var->transp.offset = 0;
344                 var->transp.length = 0;
345                 var->transp.msb_right = 0;
346                 var->red.msb_right = 0;
347                 var->green.msb_right = 0;
348                 var->blue.msb_right = 0;
349                 break;
350         default:
351                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
352                          var->bits_per_pixel);
353                 return -EINVAL;
354         }
355
356         if (info->var.xres != var->xres || info->var.yres != var->yres ||
357             info->var.xres_virtual != var->xres_virtual ||
358             info->var.yres_virtual != var->yres_virtual) {
359                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
360                          __func__, var->xres, var->yres);
361                 return -EINVAL;
362         }
363
364         /*
365          *  Memory limit
366          */
367
368         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
369                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
370                          __func__, var->yres_virtual);
371                 return -ENOMEM;
372         }
373
374         return 0;
375 }
376
377 static int bfin_bf54x_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
378 {
379
380         struct bfin_bf54xfb_info *fbi = info->par;
381
382         if (fbi->lq043_mmap)
383                 return -1;
384
385         spin_lock(&fbi->lock);
386         fbi->lq043_mmap = 1;
387         spin_unlock(&fbi->lock);
388
389         vma->vm_start = (unsigned long)(fbi->fb_buffer);
390
391         vma->vm_end = vma->vm_start + info->fix.smem_len;
392         /* For those who don't understand how mmap works, go read
393          *   Documentation/nommu-mmap.txt.
394          * For those that do, you will know that the VM_MAYSHARE flag
395          * must be set in the vma->vm_flags structure on noMMU
396          *   Other flags can be set, and are documented in
397          *   include/linux/mm.h
398          */
399         vma->vm_flags |=  VM_MAYSHARE | VM_SHARED;
400
401         return 0;
402 }
403
404 int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
405 {
406         if (nocursor)
407                 return 0;
408         else
409                 return -EINVAL; /* just to force soft_cursor() call */
410 }
411
412 static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
413                                    u_int blue, u_int transp,
414                                    struct fb_info *info)
415 {
416         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
417                 return -EINVAL;
418
419         if (info->var.grayscale) {
420                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
421                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
422         }
423
424         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
425
426                 u32 value;
427                 /* Place color in the pseudopalette */
428                 if (regno > 16)
429                         return -EINVAL;
430
431                 red >>= (16 - info->var.red.length);
432                 green >>= (16 - info->var.green.length);
433                 blue >>= (16 - info->var.blue.length);
434
435                 value = (red << info->var.red.offset) |
436                     (green << info->var.green.offset) |
437                     (blue << info->var.blue.offset);
438                 value &= 0xFFFFFF;
439
440                 ((u32 *) (info->pseudo_palette))[regno] = value;
441
442         }
443
444         return 0;
445 }
446
447 static struct fb_ops bfin_bf54x_fb_ops = {
448         .owner = THIS_MODULE,
449         .fb_open = bfin_bf54x_fb_open,
450         .fb_release = bfin_bf54x_fb_release,
451         .fb_check_var = bfin_bf54x_fb_check_var,
452         .fb_fillrect = cfb_fillrect,
453         .fb_copyarea = cfb_copyarea,
454         .fb_imageblit = cfb_imageblit,
455         .fb_mmap = bfin_bf54x_fb_mmap,
456         .fb_cursor = bfin_bf54x_fb_cursor,
457         .fb_setcolreg = bfin_bf54x_fb_setcolreg,
458 };
459
460 #ifndef NO_BL_SUPPORT
461 static int bl_get_brightness(struct backlight_device *bd)
462 {
463         return 0;
464 }
465
466 static struct backlight_ops bfin_lq043fb_bl_ops = {
467         .get_brightness = bl_get_brightness,
468 };
469
470 static struct backlight_device *bl_dev;
471
472 static int bfin_lcd_get_power(struct lcd_device *dev)
473 {
474         return 0;
475 }
476
477 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
478 {
479         return 0;
480 }
481
482 static int bfin_lcd_get_contrast(struct lcd_device *dev)
483 {
484         return 0;
485 }
486
487 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
488 {
489
490         return 0;
491 }
492
493 static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
494 {
495         if (!fi || (fi == &bfin_bf54x_fb))
496                 return 1;
497         return 0;
498 }
499
500 static struct lcd_ops bfin_lcd_ops = {
501         .get_power = bfin_lcd_get_power,
502         .set_power = bfin_lcd_set_power,
503         .get_contrast = bfin_lcd_get_contrast,
504         .set_contrast = bfin_lcd_set_contrast,
505         .check_fb = bfin_lcd_check_fb,
506 };
507
508 static struct lcd_device *lcd_dev;
509 #endif
510
511 static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
512 {
513         /*struct bfin_bf54xfb_info *info = dev_id;*/
514
515         u16 status = bfin_read_EPPI0_STATUS();
516
517         bfin_write_EPPI0_STATUS(0xFFFF);
518
519         if (status) {
520                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
521                 disable_dma(CH_EPPI0);
522
523                 /* start dma */
524                 enable_dma(CH_EPPI0);
525                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
526                 bfin_write_EPPI0_STATUS(0xFFFF);
527         }
528
529         return IRQ_HANDLED;
530 }
531
532 static int __devinit bfin_bf54x_probe(struct platform_device *pdev)
533 {
534         struct bfin_bf54xfb_info *info;
535         struct fb_info *fbinfo;
536         int ret;
537
538         printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
539
540         if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
541                 printk(KERN_ERR DRIVER_NAME
542                        ": couldn't request CH_EPPI0 DMA\n");
543                 ret = -EFAULT;
544                 goto out1;
545         }
546
547         fbinfo =
548             framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
549         if (!fbinfo) {
550                 ret = -ENOMEM;
551                 goto out2;
552         }
553
554         info = fbinfo->par;
555         info->fb = fbinfo;
556         info->dev = &pdev->dev;
557
558         platform_set_drvdata(pdev, fbinfo);
559
560         strcpy(fbinfo->fix.id, driver_name);
561
562         info->mach_info = pdev->dev.platform_data;
563
564         if (info->mach_info == NULL) {
565                 dev_err(&pdev->dev,
566                         "no platform data for lcd, cannot attach\n");
567                 ret = -EINVAL;
568                 goto out3;
569         }
570
571         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
572         fbinfo->fix.type_aux = 0;
573         fbinfo->fix.xpanstep = 0;
574         fbinfo->fix.ypanstep = 0;
575         fbinfo->fix.ywrapstep = 0;
576         fbinfo->fix.accel = FB_ACCEL_NONE;
577         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
578
579         fbinfo->var.nonstd = 0;
580         fbinfo->var.activate = FB_ACTIVATE_NOW;
581         fbinfo->var.height = info->mach_info->height;
582         fbinfo->var.width = info->mach_info->width;
583         fbinfo->var.accel_flags = 0;
584         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
585
586         fbinfo->fbops = &bfin_bf54x_fb_ops;
587         fbinfo->flags = FBINFO_FLAG_DEFAULT;
588
589         fbinfo->var.xres = info->mach_info->xres.defval;
590         fbinfo->var.xres_virtual = info->mach_info->xres.defval;
591         fbinfo->var.yres = info->mach_info->yres.defval;
592         fbinfo->var.yres_virtual = info->mach_info->yres.defval;
593         fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
594
595         fbinfo->var.upper_margin = 0;
596         fbinfo->var.lower_margin = 0;
597         fbinfo->var.vsync_len = 0;
598
599         fbinfo->var.left_margin = 0;
600         fbinfo->var.right_margin = 0;
601         fbinfo->var.hsync_len = 0;
602
603         fbinfo->var.red.offset = 16;
604         fbinfo->var.green.offset = 8;
605         fbinfo->var.blue.offset = 0;
606         fbinfo->var.transp.offset = 0;
607         fbinfo->var.red.length = 8;
608         fbinfo->var.green.length = 8;
609         fbinfo->var.blue.length = 8;
610         fbinfo->var.transp.length = 0;
611         fbinfo->fix.smem_len = info->mach_info->xres.max *
612             info->mach_info->yres.max * info->mach_info->bpp.max / 8;
613
614         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
615             fbinfo->var.bits_per_pixel / 8;
616
617         info->fb_buffer =
618             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
619                                GFP_KERNEL);
620
621         if (NULL == info->fb_buffer) {
622                 printk(KERN_ERR DRIVER_NAME
623                        ": couldn't allocate dma buffer.\n");
624                 ret = -ENOMEM;
625                 goto out3;
626         }
627
628         fbinfo->screen_base = (void *)info->fb_buffer;
629         fbinfo->fix.smem_start = (int)info->fb_buffer;
630
631         fbinfo->fbops = &bfin_bf54x_fb_ops;
632
633         fbinfo->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
634         if (!fbinfo->pseudo_palette) {
635                 printk(KERN_ERR DRIVER_NAME
636                        "Fail to allocate pseudo_palette\n");
637
638                 ret = -ENOMEM;
639                 goto out4;
640         }
641
642         memset(fbinfo->pseudo_palette, 0, sizeof(u32) * 16);
643
644         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
645             < 0) {
646                 printk(KERN_ERR DRIVER_NAME
647                        "Fail to allocate colormap (%d entries)\n",
648                        BFIN_LCD_NBR_PALETTE_ENTRIES);
649                 ret = -EFAULT;
650                 goto out5;
651         }
652
653         if (request_ports(info)) {
654                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
655                 ret = -EFAULT;
656                 goto out6;
657         }
658
659         info->irq = platform_get_irq(pdev, 0);
660         if (info->irq < 0) {
661                 ret = -EINVAL;
662                 goto out7;
663         }
664
665         if (request_irq(info->irq, bfin_bf54x_irq_error, IRQF_DISABLED,
666                         "PPI ERROR", info) < 0) {
667                 printk(KERN_ERR DRIVER_NAME
668                        ": unable to request PPI ERROR IRQ\n");
669                 ret = -EFAULT;
670                 goto out7;
671         }
672
673         if (register_framebuffer(fbinfo) < 0) {
674                 printk(KERN_ERR DRIVER_NAME
675                        ": unable to register framebuffer.\n");
676                 ret = -EINVAL;
677                 goto out8;
678         }
679 #ifndef NO_BL_SUPPORT
680         bl_dev =
681             backlight_device_register("bf54x-bl", NULL, NULL,
682                                       &bfin_lq043fb_bl_ops);
683         bl_dev->props.max_brightness = 255;
684
685         lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);
686         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
687 #endif
688
689         return 0;
690
691 out8:
692         free_irq(info->irq, info);
693 out7:
694         free_ports(info);
695 out6:
696         fb_dealloc_cmap(&fbinfo->cmap);
697 out5:
698         kfree(fbinfo->pseudo_palette);
699 out4:
700         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
701                           info->dma_handle);
702 out3:
703         framebuffer_release(fbinfo);
704 out2:
705         free_dma(CH_EPPI0);
706 out1:
707         platform_set_drvdata(pdev, NULL);
708
709         return ret;
710 }
711
712 static int __devexit bfin_bf54x_remove(struct platform_device *pdev)
713 {
714
715         struct fb_info *fbinfo = platform_get_drvdata(pdev);
716         struct bfin_bf54xfb_info *info = fbinfo->par;
717
718         free_dma(CH_EPPI0);
719         free_irq(info->irq, info);
720
721         if (info->fb_buffer != NULL)
722                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
723                                   info->dma_handle);
724
725         kfree(fbinfo->pseudo_palette);
726         fb_dealloc_cmap(&fbinfo->cmap);
727
728 #ifndef NO_BL_SUPPORT
729         lcd_device_unregister(lcd_dev);
730         backlight_device_unregister(bl_dev);
731 #endif
732
733         unregister_framebuffer(fbinfo);
734
735         free_ports(info);
736
737         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
738
739         return 0;
740 }
741
742 #ifdef CONFIG_PM
743 static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
744 {
745         struct fb_info *fbinfo = platform_get_drvdata(pdev);
746
747         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
748         disable_dma(CH_EPPI0);
749         bfin_write_EPPI0_STATUS(0xFFFF);
750
751         return 0;
752 }
753
754 static int bfin_bf54x_resume(struct platform_device *pdev)
755 {
756         struct fb_info *fbinfo = platform_get_drvdata(pdev);
757         struct bfin_bf54xfb_info *info = fbinfo->par;
758
759         if (info->lq043_open_cnt) {
760
761                 bfin_write_EPPI0_CONTROL(0);
762                 SSYNC();
763
764                 config_dma(info);
765                 config_ppi(info);
766
767                 /* start dma */
768                 enable_dma(CH_EPPI0);
769                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
770         }
771
772         return 0;
773 }
774 #else
775 #define bfin_bf54x_suspend      NULL
776 #define bfin_bf54x_resume       NULL
777 #endif
778
779 static struct platform_driver bfin_bf54x_driver = {
780         .probe = bfin_bf54x_probe,
781         .remove = __devexit_p(bfin_bf54x_remove),
782         .suspend = bfin_bf54x_suspend,
783         .resume = bfin_bf54x_resume,
784         .driver = {
785                    .name = DRIVER_NAME,
786                    .owner = THIS_MODULE,
787                    },
788 };
789
790 static int __init bfin_bf54x_driver_init(void)
791 {
792         return platform_driver_register(&bfin_bf54x_driver);
793 }
794
795 static void __exit bfin_bf54x_driver_cleanup(void)
796 {
797         platform_driver_unregister(&bfin_bf54x_driver);
798 }
799
800 MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
801 MODULE_LICENSE("GPL");
802
803 module_init(bfin_bf54x_driver_init);
804 module_exit(bfin_bf54x_driver_cleanup);