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