CRED: Wrap task credential accesses in the JFS filesystem
[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_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                 memset(fbi->fb_buffer, 0, info->fix.smem_len);
327         }
328
329         spin_unlock(&fbi->lock);
330
331         return 0;
332 }
333
334 static int bfin_bf54x_fb_check_var(struct fb_var_screeninfo *var,
335                                    struct fb_info *info)
336 {
337
338         if (var->bits_per_pixel != LCD_BPP) {
339                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
340                          var->bits_per_pixel);
341                 return -EINVAL;
342         }
343
344         if (info->var.xres != var->xres || info->var.yres != var->yres ||
345             info->var.xres_virtual != var->xres_virtual ||
346             info->var.yres_virtual != var->yres_virtual) {
347                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
348                          __func__, var->xres, var->yres);
349                 return -EINVAL;
350         }
351
352         /*
353          *  Memory limit
354          */
355
356         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
357                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
358                          __func__, var->yres_virtual);
359                 return -ENOMEM;
360         }
361
362         return 0;
363 }
364
365 static int bfin_bf54x_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
366 {
367
368         struct bfin_bf54xfb_info *fbi = info->par;
369
370         if (fbi->lq043_mmap)
371                 return -1;
372
373         spin_lock(&fbi->lock);
374         fbi->lq043_mmap = 1;
375         spin_unlock(&fbi->lock);
376
377         vma->vm_start = (unsigned long)(fbi->fb_buffer);
378
379         vma->vm_end = vma->vm_start + info->fix.smem_len;
380         /* For those who don't understand how mmap works, go read
381          *   Documentation/nommu-mmap.txt.
382          * For those that do, you will know that the VM_MAYSHARE flag
383          * must be set in the vma->vm_flags structure on noMMU
384          *   Other flags can be set, and are documented in
385          *   include/linux/mm.h
386          */
387         vma->vm_flags |=  VM_MAYSHARE | VM_SHARED;
388
389         return 0;
390 }
391
392 int bfin_bf54x_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
393 {
394         if (nocursor)
395                 return 0;
396         else
397                 return -EINVAL; /* just to force soft_cursor() call */
398 }
399
400 static int bfin_bf54x_fb_setcolreg(u_int regno, u_int red, u_int green,
401                                    u_int blue, u_int transp,
402                                    struct fb_info *info)
403 {
404         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
405                 return -EINVAL;
406
407         if (info->var.grayscale) {
408                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
409                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
410         }
411
412         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
413
414                 u32 value;
415                 /* Place color in the pseudopalette */
416                 if (regno > 16)
417                         return -EINVAL;
418
419                 red >>= (16 - info->var.red.length);
420                 green >>= (16 - info->var.green.length);
421                 blue >>= (16 - info->var.blue.length);
422
423                 value = (red << info->var.red.offset) |
424                     (green << info->var.green.offset) |
425                     (blue << info->var.blue.offset);
426                 value &= 0xFFFFFF;
427
428                 ((u32 *) (info->pseudo_palette))[regno] = value;
429
430         }
431
432         return 0;
433 }
434
435 static struct fb_ops bfin_bf54x_fb_ops = {
436         .owner = THIS_MODULE,
437         .fb_open = bfin_bf54x_fb_open,
438         .fb_release = bfin_bf54x_fb_release,
439         .fb_check_var = bfin_bf54x_fb_check_var,
440         .fb_fillrect = cfb_fillrect,
441         .fb_copyarea = cfb_copyarea,
442         .fb_imageblit = cfb_imageblit,
443         .fb_mmap = bfin_bf54x_fb_mmap,
444         .fb_cursor = bfin_bf54x_fb_cursor,
445         .fb_setcolreg = bfin_bf54x_fb_setcolreg,
446 };
447
448 #ifndef NO_BL_SUPPORT
449 static int bl_get_brightness(struct backlight_device *bd)
450 {
451         return 0;
452 }
453
454 static struct backlight_ops bfin_lq043fb_bl_ops = {
455         .get_brightness = bl_get_brightness,
456 };
457
458 static struct backlight_device *bl_dev;
459
460 static int bfin_lcd_get_power(struct lcd_device *dev)
461 {
462         return 0;
463 }
464
465 static int bfin_lcd_set_power(struct lcd_device *dev, int power)
466 {
467         return 0;
468 }
469
470 static int bfin_lcd_get_contrast(struct lcd_device *dev)
471 {
472         return 0;
473 }
474
475 static int bfin_lcd_set_contrast(struct lcd_device *dev, int contrast)
476 {
477
478         return 0;
479 }
480
481 static int bfin_lcd_check_fb(struct lcd_device *dev, struct fb_info *fi)
482 {
483         if (!fi || (fi == &bfin_bf54x_fb))
484                 return 1;
485         return 0;
486 }
487
488 static struct lcd_ops bfin_lcd_ops = {
489         .get_power = bfin_lcd_get_power,
490         .set_power = bfin_lcd_set_power,
491         .get_contrast = bfin_lcd_get_contrast,
492         .set_contrast = bfin_lcd_set_contrast,
493         .check_fb = bfin_lcd_check_fb,
494 };
495
496 static struct lcd_device *lcd_dev;
497 #endif
498
499 static irqreturn_t bfin_bf54x_irq_error(int irq, void *dev_id)
500 {
501         /*struct bfin_bf54xfb_info *info = dev_id;*/
502
503         u16 status = bfin_read_EPPI0_STATUS();
504
505         bfin_write_EPPI0_STATUS(0xFFFF);
506
507         if (status) {
508                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
509                 disable_dma(CH_EPPI0);
510
511                 /* start dma */
512                 enable_dma(CH_EPPI0);
513                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
514                 bfin_write_EPPI0_STATUS(0xFFFF);
515         }
516
517         return IRQ_HANDLED;
518 }
519
520 static int __init bfin_bf54x_probe(struct platform_device *pdev)
521 {
522         struct bfin_bf54xfb_info *info;
523         struct fb_info *fbinfo;
524         int ret;
525
526         printk(KERN_INFO DRIVER_NAME ": FrameBuffer initializing...\n");
527
528         if (request_dma(CH_EPPI0, "CH_EPPI0") < 0) {
529                 printk(KERN_ERR DRIVER_NAME
530                        ": couldn't request CH_EPPI0 DMA\n");
531                 ret = -EFAULT;
532                 goto out1;
533         }
534
535         fbinfo =
536             framebuffer_alloc(sizeof(struct bfin_bf54xfb_info), &pdev->dev);
537         if (!fbinfo) {
538                 ret = -ENOMEM;
539                 goto out2;
540         }
541
542         info = fbinfo->par;
543         info->fb = fbinfo;
544         info->dev = &pdev->dev;
545
546         platform_set_drvdata(pdev, fbinfo);
547
548         strcpy(fbinfo->fix.id, driver_name);
549
550         info->mach_info = pdev->dev.platform_data;
551
552         if (info->mach_info == NULL) {
553                 dev_err(&pdev->dev,
554                         "no platform data for lcd, cannot attach\n");
555                 ret = -EINVAL;
556                 goto out3;
557         }
558
559         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
560         fbinfo->fix.type_aux = 0;
561         fbinfo->fix.xpanstep = 0;
562         fbinfo->fix.ypanstep = 0;
563         fbinfo->fix.ywrapstep = 0;
564         fbinfo->fix.accel = FB_ACCEL_NONE;
565         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
566
567         fbinfo->var.nonstd = 0;
568         fbinfo->var.activate = FB_ACTIVATE_NOW;
569         fbinfo->var.height = info->mach_info->height;
570         fbinfo->var.width = info->mach_info->width;
571         fbinfo->var.accel_flags = 0;
572         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
573
574         fbinfo->fbops = &bfin_bf54x_fb_ops;
575         fbinfo->flags = FBINFO_FLAG_DEFAULT;
576
577         fbinfo->var.xres = info->mach_info->xres.defval;
578         fbinfo->var.xres_virtual = info->mach_info->xres.defval;
579         fbinfo->var.yres = info->mach_info->yres.defval;
580         fbinfo->var.yres_virtual = info->mach_info->yres.defval;
581         fbinfo->var.bits_per_pixel = info->mach_info->bpp.defval;
582
583         fbinfo->var.upper_margin = 0;
584         fbinfo->var.lower_margin = 0;
585         fbinfo->var.vsync_len = 0;
586
587         fbinfo->var.left_margin = 0;
588         fbinfo->var.right_margin = 0;
589         fbinfo->var.hsync_len = 0;
590
591         fbinfo->var.red.offset = 16;
592         fbinfo->var.green.offset = 8;
593         fbinfo->var.blue.offset = 0;
594         fbinfo->var.transp.offset = 0;
595         fbinfo->var.red.length = 8;
596         fbinfo->var.green.length = 8;
597         fbinfo->var.blue.length = 8;
598         fbinfo->var.transp.length = 0;
599         fbinfo->fix.smem_len = info->mach_info->xres.max *
600             info->mach_info->yres.max * info->mach_info->bpp.max / 8;
601
602         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
603             fbinfo->var.bits_per_pixel / 8;
604
605         info->fb_buffer =
606             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
607                                GFP_KERNEL);
608
609         if (NULL == info->fb_buffer) {
610                 printk(KERN_ERR DRIVER_NAME
611                        ": couldn't allocate dma buffer.\n");
612                 ret = -ENOMEM;
613                 goto out3;
614         }
615
616         memset(info->fb_buffer, 0, fbinfo->fix.smem_len);
617
618         fbinfo->screen_base = (void *)info->fb_buffer;
619         fbinfo->fix.smem_start = (int)info->fb_buffer;
620
621         fbinfo->fbops = &bfin_bf54x_fb_ops;
622
623         fbinfo->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
624         if (!fbinfo->pseudo_palette) {
625                 printk(KERN_ERR DRIVER_NAME
626                        "Fail to allocate pseudo_palette\n");
627
628                 ret = -ENOMEM;
629                 goto out4;
630         }
631
632         memset(fbinfo->pseudo_palette, 0, sizeof(u32) * 16);
633
634         if (fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0)
635             < 0) {
636                 printk(KERN_ERR DRIVER_NAME
637                        "Fail to allocate colormap (%d entries)\n",
638                        BFIN_LCD_NBR_PALETTE_ENTRIES);
639                 ret = -EFAULT;
640                 goto out5;
641         }
642
643         if (request_ports(info)) {
644                 printk(KERN_ERR DRIVER_NAME ": couldn't request gpio port.\n");
645                 ret = -EFAULT;
646                 goto out6;
647         }
648
649         info->irq = platform_get_irq(pdev, 0);
650         if (info->irq < 0) {
651                 ret = -EINVAL;
652                 goto out7;
653         }
654
655         if (request_irq(info->irq, bfin_bf54x_irq_error, IRQF_DISABLED,
656                         "PPI ERROR", info) < 0) {
657                 printk(KERN_ERR DRIVER_NAME
658                        ": unable to request PPI ERROR IRQ\n");
659                 ret = -EFAULT;
660                 goto out7;
661         }
662
663         if (register_framebuffer(fbinfo) < 0) {
664                 printk(KERN_ERR DRIVER_NAME
665                        ": unable to register framebuffer.\n");
666                 ret = -EINVAL;
667                 goto out8;
668         }
669 #ifndef NO_BL_SUPPORT
670         bl_dev =
671             backlight_device_register("bf54x-bl", NULL, NULL,
672                                       &bfin_lq043fb_bl_ops);
673         bl_dev->props.max_brightness = 255;
674
675         lcd_dev = lcd_device_register(DRIVER_NAME, &pdev->dev, NULL, &bfin_lcd_ops);
676         lcd_dev->props.max_contrast = 255, printk(KERN_INFO "Done.\n");
677 #endif
678
679         return 0;
680
681 out8:
682         free_irq(info->irq, info);
683 out7:
684         free_ports(info);
685 out6:
686         fb_dealloc_cmap(&fbinfo->cmap);
687 out5:
688         kfree(fbinfo->pseudo_palette);
689 out4:
690         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
691                           info->dma_handle);
692 out3:
693         framebuffer_release(fbinfo);
694 out2:
695         free_dma(CH_EPPI0);
696 out1:
697         platform_set_drvdata(pdev, NULL);
698
699         return ret;
700 }
701
702 static int bfin_bf54x_remove(struct platform_device *pdev)
703 {
704
705         struct fb_info *fbinfo = platform_get_drvdata(pdev);
706         struct bfin_bf54xfb_info *info = fbinfo->par;
707
708         free_dma(CH_EPPI0);
709         free_irq(info->irq, info);
710
711         if (info->fb_buffer != NULL)
712                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
713                                   info->dma_handle);
714
715         kfree(fbinfo->pseudo_palette);
716         fb_dealloc_cmap(&fbinfo->cmap);
717
718 #ifndef NO_BL_SUPPORT
719         lcd_device_unregister(lcd_dev);
720         backlight_device_unregister(bl_dev);
721 #endif
722
723         unregister_framebuffer(fbinfo);
724
725         free_ports(info);
726
727         printk(KERN_INFO DRIVER_NAME ": Unregister LCD driver.\n");
728
729         return 0;
730 }
731
732 #ifdef CONFIG_PM
733 static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state)
734 {
735         struct fb_info *fbinfo = platform_get_drvdata(pdev);
736
737         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
738         disable_dma(CH_EPPI0);
739         bfin_write_EPPI0_STATUS(0xFFFF);
740
741         return 0;
742 }
743
744 static int bfin_bf54x_resume(struct platform_device *pdev)
745 {
746         struct fb_info *fbinfo = platform_get_drvdata(pdev);
747         struct bfin_bf54xfb_info *info = fbinfo->par;
748
749         if (info->lq043_open_cnt) {
750
751                 bfin_write_EPPI0_CONTROL(0);
752                 SSYNC();
753
754                 config_dma(info);
755                 config_ppi(info);
756
757                 /* start dma */
758                 enable_dma(CH_EPPI0);
759                 bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
760         }
761
762         return 0;
763 }
764 #else
765 #define bfin_bf54x_suspend      NULL
766 #define bfin_bf54x_resume       NULL
767 #endif
768
769 static struct platform_driver bfin_bf54x_driver = {
770         .probe = bfin_bf54x_probe,
771         .remove = bfin_bf54x_remove,
772         .suspend = bfin_bf54x_suspend,
773         .resume = bfin_bf54x_resume,
774         .driver = {
775                    .name = DRIVER_NAME,
776                    .owner = THIS_MODULE,
777                    },
778 };
779
780 static int __devinit bfin_bf54x_driver_init(void)
781 {
782         return platform_driver_register(&bfin_bf54x_driver);
783 }
784
785 static void __exit bfin_bf54x_driver_cleanup(void)
786 {
787         platform_driver_unregister(&bfin_bf54x_driver);
788 }
789
790 MODULE_DESCRIPTION("Blackfin BF54x TFT LCD Driver");
791 MODULE_LICENSE("GPL");
792
793 module_init(bfin_bf54x_driver_init);
794 module_exit(bfin_bf54x_driver_cleanup);