1d54d3d6960b6f09be29a340794050a520d7f772
[linux-2.6.git] / drivers / video / imxfb.c
1 /*
2  *  linux/drivers/video/imxfb.c
3  *
4  *  Freescale i.MX Frame Buffer device driver
5  *
6  *  Copyright (C) 2004 Sascha Hauer, Pengutronix
7  *   Based on acornfb.c Copyright (C) Russell King.
8  *
9  * This file is subject to the terms and conditions of the GNU General Public
10  * License.  See the file COPYING in the main directory of this archive for
11  * more details.
12  *
13  * Please direct your questions and comments on this driver to the following
14  * email address:
15  *
16  *      linux-arm-kernel@lists.arm.linux.org.uk
17  */
18
19 //#define DEBUG 1
20
21 #include <linux/config.h>
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/sched.h>
25 #include <linux/errno.h>
26 #include <linux/string.h>
27 #include <linux/interrupt.h>
28 #include <linux/slab.h>
29 #include <linux/fb.h>
30 #include <linux/delay.h>
31 #include <linux/init.h>
32 #include <linux/ioport.h>
33 #include <linux/cpufreq.h>
34 #include <linux/device.h>
35 #include <linux/dma-mapping.h>
36
37 #include <asm/hardware.h>
38 #include <asm/io.h>
39 #include <asm/uaccess.h>
40 #include <asm/arch/imxfb.h>
41
42 /*
43  * Complain if VAR is out of range.
44  */
45 #define DEBUG_VAR 1
46
47 #include "imxfb.h"
48
49 static struct imxfb_rgb def_rgb_16 = {
50         .red    = { .offset = 8,  .length = 4, },
51         .green  = { .offset = 4,  .length = 4, },
52         .blue   = { .offset = 0,  .length = 4, },
53         .transp = { .offset = 0,  .length = 0, },
54 };
55
56 static struct imxfb_rgb def_rgb_8 = {
57         .red    = { .offset = 0,  .length = 8, },
58         .green  = { .offset = 0,  .length = 8, },
59         .blue   = { .offset = 0,  .length = 8, },
60         .transp = { .offset = 0,  .length = 0, },
61 };
62
63 static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info);
64
65 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
66 {
67         chan &= 0xffff;
68         chan >>= 16 - bf->length;
69         return chan << bf->offset;
70 }
71
72 #define LCDC_PALETTE(x) __REG2(IMX_LCDC_BASE+0x800, (x)<<2)
73 static int
74 imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
75                        u_int trans, struct fb_info *info)
76 {
77         struct imxfb_info *fbi = info->par;
78         u_int val, ret = 1;
79
80 #define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
81         if (regno < fbi->palette_size) {
82                 val = (CNVT_TOHW(red, 4) << 8) |
83                       (CNVT_TOHW(green,4) << 4) |
84                       CNVT_TOHW(blue,  4);
85
86                 LCDC_PALETTE(regno) = val;
87                 ret = 0;
88         }
89         return ret;
90 }
91
92 static int
93 imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
94                    u_int trans, struct fb_info *info)
95 {
96         struct imxfb_info *fbi = info->par;
97         unsigned int val;
98         int ret = 1;
99
100         /*
101          * If inverse mode was selected, invert all the colours
102          * rather than the register number.  The register number
103          * is what you poke into the framebuffer to produce the
104          * colour you requested.
105          */
106         if (fbi->cmap_inverse) {
107                 red   = 0xffff - red;
108                 green = 0xffff - green;
109                 blue  = 0xffff - blue;
110         }
111
112         /*
113          * If greyscale is true, then we convert the RGB value
114          * to greyscale no mater what visual we are using.
115          */
116         if (info->var.grayscale)
117                 red = green = blue = (19595 * red + 38470 * green +
118                                         7471 * blue) >> 16;
119
120         switch (info->fix.visual) {
121         case FB_VISUAL_TRUECOLOR:
122                 /*
123                  * 12 or 16-bit True Colour.  We encode the RGB value
124                  * according to the RGB bitfield information.
125                  */
126                 if (regno < 16) {
127                         u32 *pal = info->pseudo_palette;
128
129                         val  = chan_to_field(red, &info->var.red);
130                         val |= chan_to_field(green, &info->var.green);
131                         val |= chan_to_field(blue, &info->var.blue);
132
133                         pal[regno] = val;
134                         ret = 0;
135                 }
136                 break;
137
138         case FB_VISUAL_STATIC_PSEUDOCOLOR:
139         case FB_VISUAL_PSEUDOCOLOR:
140                 ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
141                 break;
142         }
143
144         return ret;
145 }
146
147 /*
148  *  imxfb_check_var():
149  *    Round up in the following order: bits_per_pixel, xres,
150  *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
151  *    bitfields, horizontal timing, vertical timing.
152  */
153 static int
154 imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
155 {
156         struct imxfb_info *fbi = info->par;
157         int rgbidx;
158
159         if (var->xres < MIN_XRES)
160                 var->xres = MIN_XRES;
161         if (var->yres < MIN_YRES)
162                 var->yres = MIN_YRES;
163         if (var->xres > fbi->max_xres)
164                 var->xres = fbi->max_xres;
165         if (var->yres > fbi->max_yres)
166                 var->yres = fbi->max_yres;
167         var->xres_virtual = max(var->xres_virtual, var->xres);
168         var->yres_virtual = max(var->yres_virtual, var->yres);
169
170         pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
171         switch (var->bits_per_pixel) {
172         case 16:
173                 rgbidx = RGB_16;
174                 break;
175         case 8:
176                 rgbidx = RGB_8;
177                 break;
178         default:
179                 rgbidx = RGB_16;
180         }
181
182         /*
183          * Copy the RGB parameters for this display
184          * from the machine specific parameters.
185          */
186         var->red    = fbi->rgb[rgbidx]->red;
187         var->green  = fbi->rgb[rgbidx]->green;
188         var->blue   = fbi->rgb[rgbidx]->blue;
189         var->transp = fbi->rgb[rgbidx]->transp;
190
191         pr_debug("RGBT length = %d:%d:%d:%d\n",
192                 var->red.length, var->green.length, var->blue.length,
193                 var->transp.length);
194
195         pr_debug("RGBT offset = %d:%d:%d:%d\n",
196                 var->red.offset, var->green.offset, var->blue.offset,
197                 var->transp.offset);
198
199         return 0;
200 }
201
202 /*
203  * imxfb_set_par():
204  *      Set the user defined part of the display for the specified console
205  */
206 static int imxfb_set_par(struct fb_info *info)
207 {
208         struct imxfb_info *fbi = info->par;
209         struct fb_var_screeninfo *var = &info->var;
210
211         pr_debug("set_par\n");
212
213         if (var->bits_per_pixel == 16)
214                 info->fix.visual = FB_VISUAL_TRUECOLOR;
215         else if (!fbi->cmap_static)
216                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
217         else {
218                 /*
219                  * Some people have weird ideas about wanting static
220                  * pseudocolor maps.  I suspect their user space
221                  * applications are broken.
222                  */
223                 info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
224         }
225
226         info->fix.line_length = var->xres_virtual *
227                                   var->bits_per_pixel / 8;
228         fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
229
230         imxfb_activate_var(var, info);
231
232         return 0;
233 }
234
235 static void imxfb_enable_controller(struct imxfb_info *fbi)
236 {
237         pr_debug("Enabling LCD controller\n");
238
239         /* initialize LCDC */
240         LCDC_RMCR &= ~RMCR_LCDC_EN;             /* just to be safe... */
241
242         LCDC_SSA        = fbi->screen_dma;
243         /* physical screen start address            */
244         LCDC_VPW        = VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4);
245
246         LCDC_POS        = 0x00000000;   /* panning offset 0 (0 pixel offset)        */
247
248         /* disable hardware cursor */
249         LCDC_CPOS       &= ~(CPOS_CC0 | CPOS_CC1);
250
251         LCDC_RMCR = RMCR_LCDC_EN;
252
253         if(fbi->backlight_power)
254                 fbi->backlight_power(1);
255         if(fbi->lcd_power)
256                 fbi->lcd_power(1);
257 }
258
259 static void imxfb_disable_controller(struct imxfb_info *fbi)
260 {
261         pr_debug("Disabling LCD controller\n");
262
263         if(fbi->backlight_power)
264                 fbi->backlight_power(0);
265         if(fbi->lcd_power)
266                 fbi->lcd_power(0);
267
268         LCDC_RMCR = 0;
269 }
270
271 static int imxfb_blank(int blank, struct fb_info *info)
272 {
273         struct imxfb_info *fbi = info->par;
274
275         pr_debug("imxfb_blank: blank=%d\n", blank);
276
277         switch (blank) {
278         case FB_BLANK_POWERDOWN:
279         case FB_BLANK_VSYNC_SUSPEND:
280         case FB_BLANK_HSYNC_SUSPEND:
281         case FB_BLANK_NORMAL:
282                 imxfb_disable_controller(fbi);
283                 break;
284
285         case FB_BLANK_UNBLANK:
286                 imxfb_enable_controller(fbi);
287                 break;
288         }
289         return 0;
290 }
291
292 static struct fb_ops imxfb_ops = {
293         .owner          = THIS_MODULE,
294         .fb_check_var   = imxfb_check_var,
295         .fb_set_par     = imxfb_set_par,
296         .fb_setcolreg   = imxfb_setcolreg,
297         .fb_fillrect    = cfb_fillrect,
298         .fb_copyarea    = cfb_copyarea,
299         .fb_imageblit   = cfb_imageblit,
300         .fb_blank       = imxfb_blank,
301         .fb_cursor      = soft_cursor, /* FIXME: i.MX can do hardware cursor */
302 };
303
304 /*
305  * imxfb_activate_var():
306  *      Configures LCD Controller based on entries in var parameter.  Settings are
307  *      only written to the controller if changes were made.
308  */
309 static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
310 {
311         struct imxfb_info *fbi = info->par;
312         pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
313                 var->xres, var->hsync_len,
314                 var->left_margin, var->right_margin);
315         pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
316                 var->yres, var->vsync_len,
317                 var->upper_margin, var->lower_margin);
318
319 #if DEBUG_VAR
320         if (var->xres < 16        || var->xres > 1024)
321                 printk(KERN_ERR "%s: invalid xres %d\n",
322                         info->fix.id, var->xres);
323         if (var->hsync_len < 1    || var->hsync_len > 64)
324                 printk(KERN_ERR "%s: invalid hsync_len %d\n",
325                         info->fix.id, var->hsync_len);
326         if (var->left_margin > 255)
327                 printk(KERN_ERR "%s: invalid left_margin %d\n",
328                         info->fix.id, var->left_margin);
329         if (var->right_margin > 255)
330                 printk(KERN_ERR "%s: invalid right_margin %d\n",
331                         info->fix.id, var->right_margin);
332         if (var->yres < 1 || var->yres > 511)
333                 printk(KERN_ERR "%s: invalid yres %d\n",
334                         info->fix.id, var->yres);
335         if (var->vsync_len > 100)
336                 printk(KERN_ERR "%s: invalid vsync_len %d\n",
337                         info->fix.id, var->vsync_len);
338         if (var->upper_margin > 63)
339                 printk(KERN_ERR "%s: invalid upper_margin %d\n",
340                         info->fix.id, var->upper_margin);
341         if (var->lower_margin > 255)
342                 printk(KERN_ERR "%s: invalid lower_margin %d\n",
343                         info->fix.id, var->lower_margin);
344 #endif
345
346         LCDC_HCR        = HCR_H_WIDTH(var->hsync_len) |
347                           HCR_H_WAIT_1(var->left_margin) |
348                           HCR_H_WAIT_2(var->right_margin);
349
350         LCDC_VCR        = VCR_V_WIDTH(var->vsync_len) |
351                           VCR_V_WAIT_1(var->upper_margin) |
352                           VCR_V_WAIT_2(var->lower_margin);
353
354         LCDC_SIZE       = SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres);
355         LCDC_PCR        = fbi->pcr;
356         LCDC_PWMR       = fbi->pwmr;
357         LCDC_LSCR1      = fbi->lscr1;
358         LCDC_DMACR      = fbi->dmacr;
359
360         return 0;
361 }
362
363 static void imxfb_setup_gpio(struct imxfb_info *fbi)
364 {
365         int width;
366
367         LCDC_RMCR       &= ~(RMCR_LCDC_EN | RMCR_SELF_REF);
368
369         if( fbi->pcr & PCR_TFT )
370                 width = 16;
371         else
372                 width = 1 << ((fbi->pcr >> 28) & 0x3);
373
374         switch(width) {
375         case 16:
376                 imx_gpio_mode(PD30_PF_LD15);
377                 imx_gpio_mode(PD29_PF_LD14);
378                 imx_gpio_mode(PD28_PF_LD13);
379                 imx_gpio_mode(PD27_PF_LD12);
380                 imx_gpio_mode(PD26_PF_LD11);
381                 imx_gpio_mode(PD25_PF_LD10);
382                 imx_gpio_mode(PD24_PF_LD9);
383                 imx_gpio_mode(PD23_PF_LD8);
384         case 8:
385                 imx_gpio_mode(PD22_PF_LD7);
386                 imx_gpio_mode(PD21_PF_LD6);
387                 imx_gpio_mode(PD20_PF_LD5);
388                 imx_gpio_mode(PD19_PF_LD4);
389         case 4:
390                 imx_gpio_mode(PD18_PF_LD3);
391                 imx_gpio_mode(PD17_PF_LD2);
392         case 2:
393                 imx_gpio_mode(PD16_PF_LD1);
394         case 1:
395                 imx_gpio_mode(PD15_PF_LD0);
396         }
397
398         /* initialize GPIOs */
399         imx_gpio_mode(PD6_PF_LSCLK);
400         imx_gpio_mode(PD10_PF_SPL_SPR);
401         imx_gpio_mode(PD11_PF_CONTRAST);
402         imx_gpio_mode(PD14_PF_FLM_VSYNC);
403         imx_gpio_mode(PD13_PF_LP_HSYNC);
404         imx_gpio_mode(PD7_PF_REV);
405         imx_gpio_mode(PD8_PF_CLS);
406
407 #ifndef CONFIG_MACH_PIMX1
408         /* on PiMX1 used as buffers enable signal
409          */
410         imx_gpio_mode(PD9_PF_PS);
411 #endif
412
413 #ifndef CONFIG_MACH_MX1FS2
414         /* on mx1fs2 this pin is used to (de)activate the display, so we need
415          * it as a normal gpio
416          */
417         imx_gpio_mode(PD12_PF_ACD_OE);
418 #endif
419
420 }
421
422 #ifdef CONFIG_PM
423 /*
424  * Power management hooks.  Note that we won't be called from IRQ context,
425  * unlike the blank functions above, so we may sleep.
426  */
427 static int imxfb_suspend(struct device *dev, pm_message_t state, u32 level)
428 {
429         struct imxfb_info *fbi = dev_get_drvdata(dev);
430         pr_debug("%s\n",__FUNCTION__);
431
432         if (level == SUSPEND_DISABLE || level == SUSPEND_POWER_DOWN)
433                 imxfb_disable_controller(fbi);
434         return 0;
435 }
436
437 static int imxfb_resume(struct device *dev, u32 level)
438 {
439         struct imxfb_info *fbi = dev_get_drvdata(dev);
440         pr_debug("%s\n",__FUNCTION__);
441
442         if (level == RESUME_ENABLE)
443                 imxfb_enable_controller(fbi);
444         return 0;
445 }
446 #else
447 #define imxfb_suspend   NULL
448 #define imxfb_resume    NULL
449 #endif
450
451 static int __init imxfb_init_fbinfo(struct device *dev)
452 {
453         struct imxfb_mach_info *inf = dev->platform_data;
454         struct fb_info *info = dev_get_drvdata(dev);
455         struct imxfb_info *fbi = info->par;
456
457         pr_debug("%s\n",__FUNCTION__);
458
459         info->pseudo_palette = kmalloc( sizeof(u32) * 16, GFP_KERNEL);
460         if (!info->pseudo_palette)
461                 return -ENOMEM;
462
463         memset(fbi, 0, sizeof(struct imxfb_info));
464         fbi->dev = dev;
465
466         strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
467
468         info->fix.type  = FB_TYPE_PACKED_PIXELS;
469         info->fix.type_aux              = 0;
470         info->fix.xpanstep              = 0;
471         info->fix.ypanstep              = 0;
472         info->fix.ywrapstep             = 0;
473         info->fix.accel = FB_ACCEL_NONE;
474
475         info->var.nonstd                = 0;
476         info->var.activate              = FB_ACTIVATE_NOW;
477         info->var.height                = -1;
478         info->var.width = -1;
479         info->var.accel_flags           = 0;
480         info->var.vmode = FB_VMODE_NONINTERLACED;
481
482         info->fbops                     = &imxfb_ops;
483         info->flags                     = FBINFO_FLAG_DEFAULT;
484         info->pseudo_palette            = (fbi + 1);
485
486         fbi->rgb[RGB_16]                = &def_rgb_16;
487         fbi->rgb[RGB_8]                 = &def_rgb_8;
488
489         fbi->max_xres                   = inf->xres;
490         info->var.xres                  = inf->xres;
491         info->var.xres_virtual          = inf->xres;
492         fbi->max_yres                   = inf->yres;
493         info->var.yres                  = inf->yres;
494         info->var.yres_virtual          = inf->yres;
495         fbi->max_bpp                    = inf->bpp;
496         info->var.bits_per_pixel        = inf->bpp;
497         info->var.pixclock              = inf->pixclock;
498         info->var.hsync_len             = inf->hsync_len;
499         info->var.left_margin           = inf->left_margin;
500         info->var.right_margin          = inf->right_margin;
501         info->var.vsync_len             = inf->vsync_len;
502         info->var.upper_margin          = inf->upper_margin;
503         info->var.lower_margin          = inf->lower_margin;
504         info->var.sync                  = inf->sync;
505         info->var.grayscale             = inf->cmap_greyscale;
506         fbi->cmap_inverse               = inf->cmap_inverse;
507         fbi->pcr                        = inf->pcr;
508         fbi->lscr1                      = inf->lscr1;
509         fbi->dmacr                      = inf->dmacr;
510         fbi->pwmr                       = inf->pwmr;
511         fbi->lcd_power                  = inf->lcd_power;
512         fbi->backlight_power            = inf->backlight_power;
513         info->fix.smem_len              = fbi->max_xres * fbi->max_yres *
514                                           fbi->max_bpp / 8;
515
516         return 0;
517 }
518
519 /*
520  *      Allocates the DRAM memory for the frame buffer.  This buffer is
521  *      remapped into a non-cached, non-buffered, memory region to
522  *      allow pixel writes to occur without flushing the cache.
523  *      Once this area is remapped, all virtual memory access to the
524  *      video memory should occur at the new region.
525  */
526 static int __init imxfb_map_video_memory(struct fb_info *info)
527 {
528         struct imxfb_info *fbi = info->par;
529
530         fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
531         fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
532                                         &fbi->map_dma,GFP_KERNEL);
533
534         if (fbi->map_cpu) {
535                 info->screen_base = fbi->map_cpu;
536                 fbi->screen_cpu = fbi->map_cpu;
537                 fbi->screen_dma = fbi->map_dma;
538                 info->fix.smem_start = fbi->screen_dma;
539         }
540
541         return fbi->map_cpu ? 0 : -ENOMEM;
542 }
543
544 static int __init imxfb_probe(struct device *dev)
545 {
546         struct platform_device *pdev = to_platform_device(dev);
547         struct imxfb_info *fbi;
548         struct fb_info *info;
549         struct imxfb_mach_info *inf;
550         struct resource *res;
551         int ret;
552
553         printk("i.MX Framebuffer driver\n");
554
555         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
556         if(!res)
557                 return -ENODEV;
558
559         inf = dev->platform_data;
560         if(!inf) {
561                 dev_err(dev,"No platform_data available\n");
562                 return -ENOMEM;
563         }
564
565         info = framebuffer_alloc(sizeof(struct imxfb_info), dev);
566         if(!info)
567                 return -ENOMEM;
568
569         fbi = info->par;
570
571         dev_set_drvdata(dev, info);
572
573         ret = imxfb_init_fbinfo(dev);
574         if( ret < 0 )
575                 goto failed_init;
576
577         res = request_mem_region(res->start, res->end - res->start + 1, "IMXFB");
578         if (!res) {
579                 ret = -EBUSY;
580                 goto failed_regs;
581         }
582
583         if (!inf->fixed_screen_cpu) {
584                 ret = imxfb_map_video_memory(info);
585                 if (ret) {
586                         dev_err(dev, "Failed to allocate video RAM: %d\n", ret);
587                         ret = -ENOMEM;
588                         goto failed_map;
589                 }
590         } else {
591                 /* Fixed framebuffer mapping enables location of the screen in eSRAM */
592                 fbi->map_cpu = inf->fixed_screen_cpu;
593                 fbi->map_dma = inf->fixed_screen_dma;
594                 info->screen_base = fbi->map_cpu;
595                 fbi->screen_cpu = fbi->map_cpu;
596                 fbi->screen_dma = fbi->map_dma;
597                 info->fix.smem_start = fbi->screen_dma;
598         }
599
600         /*
601          * This makes sure that our colour bitfield
602          * descriptors are correctly initialised.
603          */
604         imxfb_check_var(&info->var, info);
605
606         ret = fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
607         if (ret < 0)
608                 goto failed_cmap;
609
610         imxfb_setup_gpio(fbi);
611
612         imxfb_set_par(info);
613         ret = register_framebuffer(info);
614         if (ret < 0) {
615                 dev_err(dev, "failed to register framebuffer\n");
616                 goto failed_register;
617         }
618
619         imxfb_enable_controller(fbi);
620
621         return 0;
622
623 failed_register:
624         fb_dealloc_cmap(&info->cmap);
625 failed_cmap:
626         if (!inf->fixed_screen_cpu)
627                 dma_free_writecombine(dev,fbi->map_size,fbi->map_cpu,
628                            fbi->map_dma);
629 failed_map:
630         kfree(info->pseudo_palette);
631 failed_regs:
632         release_mem_region(res->start, res->end - res->start);
633 failed_init:
634         dev_set_drvdata(dev, NULL);
635         framebuffer_release(info);
636         return ret;
637 }
638
639 static int imxfb_remove(struct device *dev)
640 {
641         struct platform_device *pdev = to_platform_device(dev);
642         struct fb_info *info = dev_get_drvdata(dev);
643         struct imxfb_info *fbi = info->par;
644         struct resource *res;
645
646         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
647
648         imxfb_disable_controller(fbi);
649
650         unregister_framebuffer(info);
651
652         fb_dealloc_cmap(&info->cmap);
653         kfree(info->pseudo_palette);
654         framebuffer_release(info);
655
656         release_mem_region(res->start, res->end - res->start + 1);
657         dev_set_drvdata(dev, NULL);
658
659         return 0;
660 }
661
662 void  imxfb_shutdown(struct device * dev)
663 {
664         struct fb_info *info = dev_get_drvdata(dev);
665         struct imxfb_info *fbi = info->par;
666         imxfb_disable_controller(fbi);
667 }
668
669 static struct device_driver imxfb_driver = {
670         .name           = "imx-fb",
671         .bus            = &platform_bus_type,
672         .probe          = imxfb_probe,
673         .suspend        = imxfb_suspend,
674         .resume         = imxfb_resume,
675         .remove         = imxfb_remove,
676         .shutdown       = imxfb_shutdown,
677 };
678
679 int __init imxfb_init(void)
680 {
681         return driver_register(&imxfb_driver);
682 }
683
684 static void __exit imxfb_cleanup(void)
685 {
686         driver_unregister(&imxfb_driver);
687 }
688
689 module_init(imxfb_init);
690 module_exit(imxfb_cleanup);
691
692 MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
693 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
694 MODULE_LICENSE("GPL");