s3c-fb: udpate to support s3c2416/s3c2443 style hardware
[linux-2.6.git] / drivers / video / s3c-fb.c
1 /* linux/drivers/video/s3c-fb.c
2  *
3  * Copyright 2008 Openmoko Inc.
4  * Copyright 2008-2010 Simtec Electronics
5  *      Ben Dooks <ben@simtec.co.uk>
6  *      http://armlinux.simtec.co.uk/
7  *
8  * Samsung SoC Framebuffer driver
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software FoundatIon.
13 */
14
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/slab.h>
20 #include <linux/init.h>
21 #include <linux/clk.h>
22 #include <linux/fb.h>
23 #include <linux/io.h>
24
25 #include <mach/map.h>
26 #include <plat/regs-fb-v4.h>
27 #include <plat/fb.h>
28
29 /* This driver will export a number of framebuffer interfaces depending
30  * on the configuration passed in via the platform data. Each fb instance
31  * maps to a hardware window. Currently there is no support for runtime
32  * setting of the alpha-blending functions that each window has, so only
33  * window 0 is actually useful.
34  *
35  * Window 0 is treated specially, it is used for the basis of the LCD
36  * output timings and as the control for the output power-down state.
37 */
38
39 /* note, the previous use of <mach/regs-fb.h> to get platform specific data
40  * has been replaced by using the platform device name to pick the correct
41  * configuration data for the system.
42 */
43
44 #ifdef CONFIG_FB_S3C_DEBUG_REGWRITE
45 #undef writel
46 #define writel(v, r) do { \
47         printk(KERN_DEBUG "%s: %08x => %p\n", __func__, (unsigned int)v, r); \
48         __raw_writel(v, r); } while(0)
49 #endif /* FB_S3C_DEBUG_REGWRITE */
50
51 struct s3c_fb;
52
53 #define VALID_BPP(x) (1 << ((x) - 1))
54
55 #define OSD_BASE(win, variant) ((variant).osd + ((win) * (variant).osd_stride))
56 #define VIDOSD_A(win, variant) (OSD_BASE(win, variant) + 0x00)
57 #define VIDOSD_B(win, variant) (OSD_BASE(win, variant) + 0x04)
58 #define VIDOSD_C(win, variant) (OSD_BASE(win, variant) + 0x08)
59 #define VIDOSD_D(win, variant) (OSD_BASE(win, variant) + 0x0C)
60
61 /**
62  * struct s3c_fb_variant - fb variant information
63  * @is_2443: Set if S3C2443/S3C2416 style hardware.
64  * @nr_windows: The number of windows.
65  * @vidtcon: The base for the VIDTCONx registers
66  * @wincon: The base for the WINxCON registers.
67  * @winmap: The base for the WINxMAP registers.
68  * @keycon: The abse for the WxKEYCON registers.
69  * @buf_start: Offset of buffer start registers.
70  * @buf_size: Offset of buffer size registers.
71  * @buf_end: Offset of buffer end registers.
72  * @osd: The base for the OSD registers.
73  * @palette: Address of palette memory, or 0 if none.
74  */
75 struct s3c_fb_variant {
76         unsigned int    is_2443:1;
77         unsigned short  nr_windows;
78         unsigned short  vidtcon;
79         unsigned short  wincon;
80         unsigned short  winmap;
81         unsigned short  keycon;
82         unsigned short  buf_start;
83         unsigned short  buf_end;
84         unsigned short  buf_size;
85         unsigned short  osd;
86         unsigned short  osd_stride;
87         unsigned short  palette[S3C_FB_MAX_WIN];
88 };
89
90 /**
91  * struct s3c_fb_win_variant
92  * @has_osd_c: Set if has OSD C register.
93  * @has_osd_d: Set if has OSD D register.
94  * @palette_sz: Size of palette in entries.
95  * @palette_16bpp: Set if palette is 16bits wide.
96  * @valid_bpp: 1 bit per BPP setting to show valid bits-per-pixel.
97  *
98  * valid_bpp bit x is set if (x+1)BPP is supported.
99  */
100 struct s3c_fb_win_variant {
101         unsigned int    has_osd_c:1;
102         unsigned int    has_osd_d:1;
103         unsigned int    palette_16bpp:1;
104         unsigned short  palette_sz;
105         u32             valid_bpp;
106 };
107
108 /**
109  * struct s3c_fb_driverdata - per-device type driver data for init time.
110  * @variant: The variant information for this driver.
111  * @win: The window information for each window.
112  */
113 struct s3c_fb_driverdata {
114         struct s3c_fb_variant   variant;
115         struct s3c_fb_win_variant *win[S3C_FB_MAX_WIN];
116 };
117
118 /**
119  * struct s3c_fb_win - per window private data for each framebuffer.
120  * @windata: The platform data supplied for the window configuration.
121  * @parent: The hardware that this window is part of.
122  * @fbinfo: Pointer pack to the framebuffer info for this window.
123  * @varint: The variant information for this window.
124  * @palette_buffer: Buffer/cache to hold palette entries.
125  * @pseudo_palette: For use in TRUECOLOUR modes for entries 0..15/
126  * @index: The window number of this window.
127  * @palette: The bitfields for changing r/g/b into a hardware palette entry.
128  */
129 struct s3c_fb_win {
130         struct s3c_fb_pd_win    *windata;
131         struct s3c_fb           *parent;
132         struct fb_info          *fbinfo;
133         struct s3c_fb_palette    palette;
134         struct s3c_fb_win_variant variant;
135
136         u32                     *palette_buffer;
137         u32                      pseudo_palette[16];
138         unsigned int             index;
139 };
140
141 /**
142  * struct s3c_fb - overall hardware state of the hardware
143  * @dev: The device that we bound to, for printing, etc.
144  * @regs_res: The resource we claimed for the IO registers.
145  * @bus_clk: The clk (hclk) feeding our interface and possibly pixclk.
146  * @regs: The mapped hardware registers.
147  * @variant: Variant information for this hardware.
148  * @enabled: A bitmask of enabled hardware windows.
149  * @pdata: The platform configuration data passed with the device.
150  * @windows: The hardware windows that have been claimed.
151  */
152 struct s3c_fb {
153         struct device           *dev;
154         struct resource         *regs_res;
155         struct clk              *bus_clk;
156         void __iomem            *regs;
157         struct s3c_fb_variant    variant;
158
159         unsigned char            enabled;
160
161         struct s3c_fb_platdata  *pdata;
162         struct s3c_fb_win       *windows[S3C_FB_MAX_WIN];
163 };
164
165 /**
166  * s3c_fb_validate_win_bpp - validate the bits-per-pixel for this mode.
167  * @win: The device window.
168  * @bpp: The bit depth.
169  */
170 static bool s3c_fb_validate_win_bpp(struct s3c_fb_win *win, unsigned int bpp)
171 {
172         return win->variant.valid_bpp & VALID_BPP(bpp);
173 }
174
175 /**
176  * s3c_fb_check_var() - framebuffer layer request to verify a given mode.
177  * @var: The screen information to verify.
178  * @info: The framebuffer device.
179  *
180  * Framebuffer layer call to verify the given information and allow us to
181  * update various information depending on the hardware capabilities.
182  */
183 static int s3c_fb_check_var(struct fb_var_screeninfo *var,
184                             struct fb_info *info)
185 {
186         struct s3c_fb_win *win = info->par;
187         struct s3c_fb_pd_win *windata = win->windata;
188         struct s3c_fb *sfb = win->parent;
189
190         dev_dbg(sfb->dev, "checking parameters\n");
191
192         var->xres_virtual = max((unsigned int)windata->virtual_x, var->xres);
193         var->yres_virtual = max((unsigned int)windata->virtual_y, var->yres);
194
195         if (!s3c_fb_validate_win_bpp(win, var->bits_per_pixel)) {
196                 dev_dbg(sfb->dev, "win %d: unsupported bpp %d\n",
197                         win->index, var->bits_per_pixel);
198                 return -EINVAL;
199         }
200
201         /* always ensure these are zero, for drop through cases below */
202         var->transp.offset = 0;
203         var->transp.length = 0;
204
205         switch (var->bits_per_pixel) {
206         case 1:
207         case 2:
208         case 4:
209         case 8:
210                 if (sfb->variant.palette[win->index] != 0) {
211                         /* non palletised, A:1,R:2,G:3,B:2 mode */
212                         var->red.offset         = 4;
213                         var->green.offset       = 2;
214                         var->blue.offset        = 0;
215                         var->red.length         = 5;
216                         var->green.length       = 3;
217                         var->blue.length        = 2;
218                         var->transp.offset      = 7;
219                         var->transp.length      = 1;
220                 } else {
221                         var->red.offset = 0;
222                         var->red.length = var->bits_per_pixel;
223                         var->green      = var->red;
224                         var->blue       = var->red;
225                 }
226                 break;
227
228         case 19:
229                 /* 666 with one bit alpha/transparency */
230                 var->transp.offset      = 18;
231                 var->transp.length      = 1;
232         case 18:
233                 var->bits_per_pixel     = 32;
234
235                 /* 666 format */
236                 var->red.offset         = 12;
237                 var->green.offset       = 6;
238                 var->blue.offset        = 0;
239                 var->red.length         = 6;
240                 var->green.length       = 6;
241                 var->blue.length        = 6;
242                 break;
243
244         case 16:
245                 /* 16 bpp, 565 format */
246                 var->red.offset         = 11;
247                 var->green.offset       = 5;
248                 var->blue.offset        = 0;
249                 var->red.length         = 5;
250                 var->green.length       = 6;
251                 var->blue.length        = 5;
252                 break;
253
254         case 28:
255         case 25:
256                 var->transp.length      = var->bits_per_pixel - 24;
257                 var->transp.offset      = 24;
258                 /* drop through */
259         case 24:
260                 /* our 24bpp is unpacked, so 32bpp */
261                 var->bits_per_pixel     = 32;
262         case 32:
263                 var->red.offset         = 16;
264                 var->red.length         = 8;
265                 var->green.offset       = 8;
266                 var->green.length       = 8;
267                 var->blue.offset        = 0;
268                 var->blue.length        = 8;
269                 break;
270
271         default:
272                 dev_err(sfb->dev, "invalid bpp\n");
273         }
274
275         dev_dbg(sfb->dev, "%s: verified parameters\n", __func__);
276         return 0;
277 }
278
279 /**
280  * s3c_fb_calc_pixclk() - calculate the divider to create the pixel clock.
281  * @sfb: The hardware state.
282  * @pixclock: The pixel clock wanted, in picoseconds.
283  *
284  * Given the specified pixel clock, work out the necessary divider to get
285  * close to the output frequency.
286  */
287 static int s3c_fb_calc_pixclk(struct s3c_fb *sfb, unsigned int pixclk)
288 {
289         unsigned long clk = clk_get_rate(sfb->bus_clk);
290         unsigned long long tmp;
291         unsigned int result;
292
293         tmp = (unsigned long long)clk;
294         tmp *= pixclk;
295
296         do_div(tmp, 1000000000UL);
297         result = (unsigned int)tmp / 1000;
298
299         dev_dbg(sfb->dev, "pixclk=%u, clk=%lu, div=%d (%lu)\n",
300                 pixclk, clk, result, clk / result);
301
302         return result;
303 }
304
305 /**
306  * s3c_fb_align_word() - align pixel count to word boundary
307  * @bpp: The number of bits per pixel
308  * @pix: The value to be aligned.
309  *
310  * Align the given pixel count so that it will start on an 32bit word
311  * boundary.
312  */
313 static int s3c_fb_align_word(unsigned int bpp, unsigned int pix)
314 {
315         int pix_per_word;
316
317         if (bpp > 16)
318                 return pix;
319
320         pix_per_word = (8 * 32) / bpp;
321         return ALIGN(pix, pix_per_word);
322 }
323
324 /**
325  * s3c_fb_set_par() - framebuffer request to set new framebuffer state.
326  * @info: The framebuffer to change.
327  *
328  * Framebuffer layer request to set a new mode for the specified framebuffer
329  */
330 static int s3c_fb_set_par(struct fb_info *info)
331 {
332         struct fb_var_screeninfo *var = &info->var;
333         struct s3c_fb_win *win = info->par;
334         struct s3c_fb *sfb = win->parent;
335         void __iomem *regs = sfb->regs;
336         void __iomem *buf = regs;
337         int win_no = win->index;
338         u32 osdc_data = 0;
339         u32 data;
340         u32 pagewidth;
341         int clkdiv;
342
343         dev_dbg(sfb->dev, "setting framebuffer parameters\n");
344
345         switch (var->bits_per_pixel) {
346         case 32:
347         case 24:
348         case 16:
349         case 12:
350                 info->fix.visual = FB_VISUAL_TRUECOLOR;
351                 break;
352         case 8:
353                 if (win->variant.palette_sz >= 256)
354                         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
355                 else
356                         info->fix.visual = FB_VISUAL_TRUECOLOR;
357                 break;
358         case 1:
359                 info->fix.visual = FB_VISUAL_MONO01;
360                 break;
361         default:
362                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
363                 break;
364         }
365
366         info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
367
368         /* disable the window whilst we update it */
369         writel(0, regs + WINCON(win_no));
370
371         /* use platform specified window as the basis for the lcd timings */
372
373         if (win_no == sfb->pdata->default_win) {
374                 clkdiv = s3c_fb_calc_pixclk(sfb, var->pixclock);
375
376                 data = sfb->pdata->vidcon0;
377                 data &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR);
378
379                 if (clkdiv > 1)
380                         data |= VIDCON0_CLKVAL_F(clkdiv-1) | VIDCON0_CLKDIR;
381                 else
382                         data &= ~VIDCON0_CLKDIR;        /* 1:1 clock */
383
384                 /* write the timing data to the panel */
385
386                 if (sfb->variant.is_2443)
387                         data |= (1 << 5);
388
389                 data |= VIDCON0_ENVID | VIDCON0_ENVID_F;
390                 writel(data, regs + VIDCON0);
391
392                 data = VIDTCON0_VBPD(var->upper_margin - 1) |
393                        VIDTCON0_VFPD(var->lower_margin - 1) |
394                        VIDTCON0_VSPW(var->vsync_len - 1);
395
396                 writel(data, regs + sfb->variant.vidtcon);
397
398                 data = VIDTCON1_HBPD(var->left_margin - 1) |
399                        VIDTCON1_HFPD(var->right_margin - 1) |
400                        VIDTCON1_HSPW(var->hsync_len - 1);
401
402                 /* VIDTCON1 */
403                 writel(data, regs + sfb->variant.vidtcon + 4);
404
405                 data = VIDTCON2_LINEVAL(var->yres - 1) |
406                        VIDTCON2_HOZVAL(var->xres - 1);
407                 writel(data, regs +sfb->variant.vidtcon + 8 );
408         }
409
410         /* write the buffer address */
411
412         /* start and end registers stride is 8 */
413         buf = regs + win_no * 8;
414
415         writel(info->fix.smem_start, buf + sfb->variant.buf_start);
416
417         data = info->fix.smem_start + info->fix.line_length * var->yres;
418         writel(data, buf + sfb->variant.buf_end);
419
420         pagewidth = (var->xres * var->bits_per_pixel) >> 3;
421         data = VIDW_BUF_SIZE_OFFSET(info->fix.line_length - pagewidth) |
422                VIDW_BUF_SIZE_PAGEWIDTH(pagewidth);
423         writel(data, regs + sfb->variant.buf_size + (win_no * 4));
424
425         /* write 'OSD' registers to control position of framebuffer */
426
427         data = VIDOSDxA_TOPLEFT_X(0) | VIDOSDxA_TOPLEFT_Y(0);
428         writel(data, regs + VIDOSD_A(win_no, sfb->variant));
429
430         data = VIDOSDxB_BOTRIGHT_X(s3c_fb_align_word(var->bits_per_pixel,
431                                                      var->xres - 1)) |
432                VIDOSDxB_BOTRIGHT_Y(var->yres - 1);
433
434         writel(data, regs + VIDOSD_B(win_no, sfb->variant));
435
436         data = var->xres * var->yres;
437
438         osdc_data = VIDISD14C_ALPHA1_R(0xf) |
439                 VIDISD14C_ALPHA1_G(0xf) |
440                 VIDISD14C_ALPHA1_B(0xf);
441
442         if (win->variant.has_osd_d) {
443                 writel(data, regs + VIDOSD_D(win_no, sfb->variant));
444                 writel(osdc_data, regs + VIDOSD_C(win_no, sfb->variant));
445         } else
446                 writel(data, regs + VIDOSD_C(win_no, sfb->variant));
447
448         data = WINCONx_ENWIN;
449
450         /* note, since we have to round up the bits-per-pixel, we end up
451          * relying on the bitfield information for r/g/b/a to work out
452          * exactly which mode of operation is intended. */
453
454         switch (var->bits_per_pixel) {
455         case 1:
456                 data |= WINCON0_BPPMODE_1BPP;
457                 data |= WINCONx_BITSWP;
458                 data |= WINCONx_BURSTLEN_4WORD;
459                 break;
460         case 2:
461                 data |= WINCON0_BPPMODE_2BPP;
462                 data |= WINCONx_BITSWP;
463                 data |= WINCONx_BURSTLEN_8WORD;
464                 break;
465         case 4:
466                 data |= WINCON0_BPPMODE_4BPP;
467                 data |= WINCONx_BITSWP;
468                 data |= WINCONx_BURSTLEN_8WORD;
469                 break;
470         case 8:
471                 if (var->transp.length != 0)
472                         data |= WINCON1_BPPMODE_8BPP_1232;
473                 else
474                         data |= WINCON0_BPPMODE_8BPP_PALETTE;
475                 data |= WINCONx_BURSTLEN_8WORD;
476                 data |= WINCONx_BYTSWP;
477                 break;
478         case 16:
479                 if (var->transp.length != 0)
480                         data |= WINCON1_BPPMODE_16BPP_A1555;
481                 else
482                         data |= WINCON0_BPPMODE_16BPP_565;
483                 data |= WINCONx_HAWSWP;
484                 data |= WINCONx_BURSTLEN_16WORD;
485                 break;
486         case 24:
487         case 32:
488                 if (var->red.length == 6) {
489                         if (var->transp.length != 0)
490                                 data |= WINCON1_BPPMODE_19BPP_A1666;
491                         else
492                                 data |= WINCON1_BPPMODE_18BPP_666;
493                 } else if (var->transp.length == 1)
494                         data |= WINCON1_BPPMODE_25BPP_A1888
495                                 | WINCON1_BLD_PIX;
496                 else if (var->transp.length == 4)
497                         data |= WINCON1_BPPMODE_28BPP_A4888
498                                 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
499                 else
500                         data |= WINCON0_BPPMODE_24BPP_888;
501
502                 data |= WINCONx_WSWP;
503                 data |= WINCONx_BURSTLEN_16WORD;
504                 break;
505         }
506
507         /* Enable the colour keying for the window below this one */
508         if (win_no > 0) {
509                 u32 keycon0_data = 0, keycon1_data = 0;
510                 void __iomem *keycon = regs + sfb->variant.keycon;
511
512                 keycon0_data = ~(WxKEYCON0_KEYBL_EN |
513                                 WxKEYCON0_KEYEN_F |
514                                 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
515
516                 keycon1_data = WxKEYCON1_COLVAL(0xffffff);
517
518                 keycon += (win_no - 1) * 8;
519
520                 writel(keycon0_data, keycon + WKEYCON0);
521                 writel(keycon1_data, keycon + WKEYCON1);
522         }
523
524         writel(data, regs + sfb->variant.wincon + (win_no * 4));
525         writel(0x0, regs + sfb->variant.winmap + (win_no * 4));
526
527         return 0;
528 }
529
530 /**
531  * s3c_fb_update_palette() - set or schedule a palette update.
532  * @sfb: The hardware information.
533  * @win: The window being updated.
534  * @reg: The palette index being changed.
535  * @value: The computed palette value.
536  *
537  * Change the value of a palette register, either by directly writing to
538  * the palette (this requires the palette RAM to be disconnected from the
539  * hardware whilst this is in progress) or schedule the update for later.
540  *
541  * At the moment, since we have no VSYNC interrupt support, we simply set
542  * the palette entry directly.
543  */
544 static void s3c_fb_update_palette(struct s3c_fb *sfb,
545                                   struct s3c_fb_win *win,
546                                   unsigned int reg,
547                                   u32 value)
548 {
549         void __iomem *palreg;
550         u32 palcon;
551
552         palreg = sfb->regs + sfb->variant.palette[win->index];
553
554         dev_dbg(sfb->dev, "%s: win %d, reg %d (%p): %08x\n",
555                 __func__, win->index, reg, palreg, value);
556
557         win->palette_buffer[reg] = value;
558
559         palcon = readl(sfb->regs + WPALCON);
560         writel(palcon | WPALCON_PAL_UPDATE, sfb->regs + WPALCON);
561
562         if (win->variant.palette_16bpp)
563                 writew(value, palreg + (reg * 2));
564         else
565                 writel(value, palreg + (reg * 4));
566
567         writel(palcon, sfb->regs + WPALCON);
568 }
569
570 static inline unsigned int chan_to_field(unsigned int chan,
571                                          struct fb_bitfield *bf)
572 {
573         chan &= 0xffff;
574         chan >>= 16 - bf->length;
575         return chan << bf->offset;
576 }
577
578 /**
579  * s3c_fb_setcolreg() - framebuffer layer request to change palette.
580  * @regno: The palette index to change.
581  * @red: The red field for the palette data.
582  * @green: The green field for the palette data.
583  * @blue: The blue field for the palette data.
584  * @trans: The transparency (alpha) field for the palette data.
585  * @info: The framebuffer being changed.
586  */
587 static int s3c_fb_setcolreg(unsigned regno,
588                             unsigned red, unsigned green, unsigned blue,
589                             unsigned transp, struct fb_info *info)
590 {
591         struct s3c_fb_win *win = info->par;
592         struct s3c_fb *sfb = win->parent;
593         unsigned int val;
594
595         dev_dbg(sfb->dev, "%s: win %d: %d => rgb=%d/%d/%d\n",
596                 __func__, win->index, regno, red, green, blue);
597
598         switch (info->fix.visual) {
599         case FB_VISUAL_TRUECOLOR:
600                 /* true-colour, use pseudo-palette */
601
602                 if (regno < 16) {
603                         u32 *pal = info->pseudo_palette;
604
605                         val  = chan_to_field(red,   &info->var.red);
606                         val |= chan_to_field(green, &info->var.green);
607                         val |= chan_to_field(blue,  &info->var.blue);
608
609                         pal[regno] = val;
610                 }
611                 break;
612
613         case FB_VISUAL_PSEUDOCOLOR:
614                 if (regno < win->variant.palette_sz) {
615                         val  = chan_to_field(red, &win->palette.r);
616                         val |= chan_to_field(green, &win->palette.g);
617                         val |= chan_to_field(blue, &win->palette.b);
618
619                         s3c_fb_update_palette(sfb, win, regno, val);
620                 }
621
622                 break;
623
624         default:
625                 return 1;       /* unknown type */
626         }
627
628         return 0;
629 }
630
631 /**
632  * s3c_fb_enable() - Set the state of the main LCD output
633  * @sfb: The main framebuffer state.
634  * @enable: The state to set.
635  */
636 static void s3c_fb_enable(struct s3c_fb *sfb, int enable)
637 {
638         u32 vidcon0 = readl(sfb->regs + VIDCON0);
639
640         if (enable)
641                 vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F;
642         else {
643                 /* see the note in the framebuffer datasheet about
644                  * why you cannot take both of these bits down at the
645                  * same time. */
646
647                 if (!(vidcon0 & VIDCON0_ENVID))
648                         return;
649
650                 vidcon0 |= VIDCON0_ENVID;
651                 vidcon0 &= ~VIDCON0_ENVID_F;
652         }
653
654         writel(vidcon0, sfb->regs + VIDCON0);
655 }
656
657 /**
658  * s3c_fb_blank() - blank or unblank the given window
659  * @blank_mode: The blank state from FB_BLANK_*
660  * @info: The framebuffer to blank.
661  *
662  * Framebuffer layer request to change the power state.
663  */
664 static int s3c_fb_blank(int blank_mode, struct fb_info *info)
665 {
666         struct s3c_fb_win *win = info->par;
667         struct s3c_fb *sfb = win->parent;
668         unsigned int index = win->index;
669         u32 wincon;
670
671         dev_dbg(sfb->dev, "blank mode %d\n", blank_mode);
672
673         wincon = readl(sfb->regs + sfb->variant.wincon + (index * 4));
674
675         switch (blank_mode) {
676         case FB_BLANK_POWERDOWN:
677                 wincon &= ~WINCONx_ENWIN;
678                 sfb->enabled &= ~(1 << index);
679                 /* fall through to FB_BLANK_NORMAL */
680
681         case FB_BLANK_NORMAL:
682                 /* disable the DMA and display 0x0 (black) */
683                 writel(WINxMAP_MAP | WINxMAP_MAP_COLOUR(0x0),
684                        sfb->regs + sfb->variant.winmap + (index * 4));
685                 break;
686
687         case FB_BLANK_UNBLANK:
688                 writel(0x0, sfb->regs + sfb->variant.winmap + (index * 4));
689                 wincon |= WINCONx_ENWIN;
690                 sfb->enabled |= (1 << index);
691                 break;
692
693         case FB_BLANK_VSYNC_SUSPEND:
694         case FB_BLANK_HSYNC_SUSPEND:
695         default:
696                 return 1;
697         }
698
699         writel(wincon, sfb->regs + sfb->variant.wincon + (index * 4));
700
701         /* Check the enabled state to see if we need to be running the
702          * main LCD interface, as if there are no active windows then
703          * it is highly likely that we also do not need to output
704          * anything.
705          */
706
707         /* We could do something like the following code, but the current
708          * system of using framebuffer events means that we cannot make
709          * the distinction between just window 0 being inactive and all
710          * the windows being down.
711          *
712          * s3c_fb_enable(sfb, sfb->enabled ? 1 : 0);
713         */
714
715         /* we're stuck with this until we can do something about overriding
716          * the power control using the blanking event for a single fb.
717          */
718         if (index == sfb->pdata->default_win)
719                 s3c_fb_enable(sfb, blank_mode != FB_BLANK_POWERDOWN ? 1 : 0);
720
721         return 0;
722 }
723
724 static struct fb_ops s3c_fb_ops = {
725         .owner          = THIS_MODULE,
726         .fb_check_var   = s3c_fb_check_var,
727         .fb_set_par     = s3c_fb_set_par,
728         .fb_blank       = s3c_fb_blank,
729         .fb_setcolreg   = s3c_fb_setcolreg,
730         .fb_fillrect    = cfb_fillrect,
731         .fb_copyarea    = cfb_copyarea,
732         .fb_imageblit   = cfb_imageblit,
733 };
734
735 /**
736  * s3c_fb_alloc_memory() - allocate display memory for framebuffer window
737  * @sfb: The base resources for the hardware.
738  * @win: The window to initialise memory for.
739  *
740  * Allocate memory for the given framebuffer.
741  */
742 static int __devinit s3c_fb_alloc_memory(struct s3c_fb *sfb,
743                                          struct s3c_fb_win *win)
744 {
745         struct s3c_fb_pd_win *windata = win->windata;
746         unsigned int real_size, virt_size, size;
747         struct fb_info *fbi = win->fbinfo;
748         dma_addr_t map_dma;
749
750         dev_dbg(sfb->dev, "allocating memory for display\n");
751
752         real_size = windata->win_mode.xres * windata->win_mode.yres;
753         virt_size = windata->virtual_x * windata->virtual_y;
754
755         dev_dbg(sfb->dev, "real_size=%u (%u.%u), virt_size=%u (%u.%u)\n",
756                 real_size, windata->win_mode.xres, windata->win_mode.yres,
757                 virt_size, windata->virtual_x, windata->virtual_y);
758
759         size = (real_size > virt_size) ? real_size : virt_size;
760         size *= (windata->max_bpp > 16) ? 32 : windata->max_bpp;
761         size /= 8;
762
763         fbi->fix.smem_len = size;
764         size = PAGE_ALIGN(size);
765
766         dev_dbg(sfb->dev, "want %u bytes for window\n", size);
767
768         fbi->screen_base = dma_alloc_writecombine(sfb->dev, size,
769                                                   &map_dma, GFP_KERNEL);
770         if (!fbi->screen_base)
771                 return -ENOMEM;
772
773         dev_dbg(sfb->dev, "mapped %x to %p\n",
774                 (unsigned int)map_dma, fbi->screen_base);
775
776         memset(fbi->screen_base, 0x0, size);
777         fbi->fix.smem_start = map_dma;
778
779         return 0;
780 }
781
782 /**
783  * s3c_fb_free_memory() - free the display memory for the given window
784  * @sfb: The base resources for the hardware.
785  * @win: The window to free the display memory for.
786  *
787  * Free the display memory allocated by s3c_fb_alloc_memory().
788  */
789 static void s3c_fb_free_memory(struct s3c_fb *sfb, struct s3c_fb_win *win)
790 {
791         struct fb_info *fbi = win->fbinfo;
792
793         dma_free_writecombine(sfb->dev, PAGE_ALIGN(fbi->fix.smem_len),
794                               fbi->screen_base, fbi->fix.smem_start);
795 }
796
797 /**
798  * s3c_fb_release_win() - release resources for a framebuffer window.
799  * @win: The window to cleanup the resources for.
800  *
801  * Release the resources that where claimed for the hardware window,
802  * such as the framebuffer instance and any memory claimed for it.
803  */
804 static void s3c_fb_release_win(struct s3c_fb *sfb, struct s3c_fb_win *win)
805 {
806         if (win->fbinfo) {
807                 unregister_framebuffer(win->fbinfo);
808                 fb_dealloc_cmap(&win->fbinfo->cmap);
809                 s3c_fb_free_memory(sfb, win);
810                 framebuffer_release(win->fbinfo);
811         }
812 }
813
814 /**
815  * s3c_fb_probe_win() - register an hardware window
816  * @sfb: The base resources for the hardware
817  * @variant: The variant information for this window.
818  * @res: Pointer to where to place the resultant window.
819  *
820  * Allocate and do the basic initialisation for one of the hardware's graphics
821  * windows.
822  */
823 static int __devinit s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no,
824                                       struct s3c_fb_win_variant *variant,
825                                       struct s3c_fb_win **res)
826 {
827         struct fb_var_screeninfo *var;
828         struct fb_videomode *initmode;
829         struct s3c_fb_pd_win *windata;
830         struct s3c_fb_win *win;
831         struct fb_info *fbinfo;
832         int palette_size;
833         int ret;
834
835         dev_dbg(sfb->dev, "probing window %d, variant %p\n", win_no, variant);
836
837         palette_size = variant->palette_sz * 4;
838
839         fbinfo = framebuffer_alloc(sizeof(struct s3c_fb_win) +
840                                    palette_size * sizeof(u32), sfb->dev);
841         if (!fbinfo) {
842                 dev_err(sfb->dev, "failed to allocate framebuffer\n");
843                 return -ENOENT;
844         }
845
846         windata = sfb->pdata->win[win_no];
847         initmode = &windata->win_mode;
848
849         WARN_ON(windata->max_bpp == 0);
850         WARN_ON(windata->win_mode.xres == 0);
851         WARN_ON(windata->win_mode.yres == 0);
852
853         win = fbinfo->par;
854         var = &fbinfo->var;
855         win->variant = *variant;
856         win->fbinfo = fbinfo;
857         win->parent = sfb;
858         win->windata = windata;
859         win->index = win_no;
860         win->palette_buffer = (u32 *)(win + 1);
861
862         ret = s3c_fb_alloc_memory(sfb, win);
863         if (ret) {
864                 dev_err(sfb->dev, "failed to allocate display memory\n");
865                 return ret;
866         }
867
868         /* setup the r/b/g positions for the window's palette */
869         s3c_fb_init_palette(win_no, &win->palette);
870
871         /* setup the initial video mode from the window */
872         fb_videomode_to_var(&fbinfo->var, initmode);
873
874         fbinfo->fix.type        = FB_TYPE_PACKED_PIXELS;
875         fbinfo->fix.accel       = FB_ACCEL_NONE;
876         fbinfo->var.activate    = FB_ACTIVATE_NOW;
877         fbinfo->var.vmode       = FB_VMODE_NONINTERLACED;
878         fbinfo->var.bits_per_pixel = windata->default_bpp;
879         fbinfo->fbops           = &s3c_fb_ops;
880         fbinfo->flags           = FBINFO_FLAG_DEFAULT;
881         fbinfo->pseudo_palette  = &win->pseudo_palette;
882
883         /* prepare to actually start the framebuffer */
884
885         ret = s3c_fb_check_var(&fbinfo->var, fbinfo);
886         if (ret < 0) {
887                 dev_err(sfb->dev, "check_var failed on initial video params\n");
888                 return ret;
889         }
890
891         /* create initial colour map */
892
893         ret = fb_alloc_cmap(&fbinfo->cmap, win->variant.palette_sz, 1);
894         if (ret == 0)
895                 fb_set_cmap(&fbinfo->cmap, fbinfo);
896         else
897                 dev_err(sfb->dev, "failed to allocate fb cmap\n");
898
899         s3c_fb_set_par(fbinfo);
900
901         dev_dbg(sfb->dev, "about to register framebuffer\n");
902
903         /* run the check_var and set_par on our configuration. */
904
905         ret = register_framebuffer(fbinfo);
906         if (ret < 0) {
907                 dev_err(sfb->dev, "failed to register framebuffer\n");
908                 return ret;
909         }
910
911         *res = win;
912         dev_info(sfb->dev, "window %d: fb %s\n", win_no, fbinfo->fix.id);
913
914         return 0;
915 }
916
917 /**
918  * s3c_fb_clear_win() - clear hardware window registers.
919  * @sfb: The base resources for the hardware.
920  * @win: The window to process.
921  *
922  * Reset the specific window registers to a known state.
923  */
924 static void s3c_fb_clear_win(struct s3c_fb *sfb, int win)
925 {
926         void __iomem *regs = sfb->regs;
927
928         writel(0, regs + sfb->variant.wincon + (win * 4));
929         writel(0, regs + VIDOSD_A(win, sfb->variant));
930         writel(0, regs + VIDOSD_B(win, sfb->variant));
931         writel(0, regs + VIDOSD_C(win, sfb->variant));
932 }
933
934 static int __devinit s3c_fb_probe(struct platform_device *pdev)
935 {
936         struct s3c_fb_driverdata *fbdrv;
937         struct device *dev = &pdev->dev;
938         struct s3c_fb_platdata *pd;
939         struct s3c_fb *sfb;
940         struct resource *res;
941         int win;
942         int ret = 0;
943
944         fbdrv = (struct s3c_fb_driverdata *)platform_get_device_id(pdev)->driver_data;
945
946         if (fbdrv->variant.nr_windows > S3C_FB_MAX_WIN) {
947                 dev_err(dev, "too many windows, cannot attach\n");
948                 return -EINVAL;
949         }
950
951         pd = pdev->dev.platform_data;
952         if (!pd) {
953                 dev_err(dev, "no platform data specified\n");
954                 return -EINVAL;
955         }
956
957         sfb = kzalloc(sizeof(struct s3c_fb), GFP_KERNEL);
958         if (!sfb) {
959                 dev_err(dev, "no memory for framebuffers\n");
960                 return -ENOMEM;
961         }
962
963         dev_dbg(dev, "allocate new framebuffer %p\n", sfb);
964
965         sfb->dev = dev;
966         sfb->pdata = pd;
967         sfb->variant = fbdrv->variant;
968
969         sfb->bus_clk = clk_get(dev, "lcd");
970         if (IS_ERR(sfb->bus_clk)) {
971                 dev_err(dev, "failed to get bus clock\n");
972                 goto err_sfb;
973         }
974
975         clk_enable(sfb->bus_clk);
976
977         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
978         if (!res) {
979                 dev_err(dev, "failed to find registers\n");
980                 ret = -ENOENT;
981                 goto err_clk;
982         }
983
984         sfb->regs_res = request_mem_region(res->start, resource_size(res),
985                                            dev_name(dev));
986         if (!sfb->regs_res) {
987                 dev_err(dev, "failed to claim register region\n");
988                 ret = -ENOENT;
989                 goto err_clk;
990         }
991
992         sfb->regs = ioremap(res->start, resource_size(res));
993         if (!sfb->regs) {
994                 dev_err(dev, "failed to map registers\n");
995                 ret = -ENXIO;
996                 goto err_req_region;
997         }
998
999         dev_dbg(dev, "got resources (regs %p), probing windows\n", sfb->regs);
1000
1001         /* setup gpio and output polarity controls */
1002
1003         pd->setup_gpio();
1004
1005         writel(pd->vidcon1, sfb->regs + VIDCON1);
1006
1007         /* zero all windows before we do anything */
1008
1009         for (win = 0; win < fbdrv->variant.nr_windows; win++)
1010                 s3c_fb_clear_win(sfb, win);
1011
1012         /* initialise colour key controls */
1013         for (win = 0; win < (fbdrv->variant.nr_windows - 1); win++) {
1014                 void __iomem *regs = sfb->regs + sfb->variant.keycon;
1015
1016                 regs += (win * 8);
1017                 writel(0xffffff, regs + WKEYCON0);
1018                 writel(0xffffff, regs + WKEYCON1);
1019         }
1020
1021         /* we have the register setup, start allocating framebuffers */
1022
1023         for (win = 0; win < fbdrv->variant.nr_windows; win++) {
1024                 if (!pd->win[win])
1025                         continue;
1026
1027                 ret = s3c_fb_probe_win(sfb, win, fbdrv->win[win],
1028                                        &sfb->windows[win]);
1029                 if (ret < 0) {
1030                         dev_err(dev, "failed to create window %d\n", win);
1031                         for (; win >= 0; win--)
1032                                 s3c_fb_release_win(sfb, sfb->windows[win]);
1033                         goto err_ioremap;
1034                 }
1035         }
1036
1037         platform_set_drvdata(pdev, sfb);
1038
1039         return 0;
1040
1041 err_ioremap:
1042         iounmap(sfb->regs);
1043
1044 err_req_region:
1045         release_resource(sfb->regs_res);
1046         kfree(sfb->regs_res);
1047
1048 err_clk:
1049         clk_disable(sfb->bus_clk);
1050         clk_put(sfb->bus_clk);
1051
1052 err_sfb:
1053         kfree(sfb);
1054         return ret;
1055 }
1056
1057 /**
1058  * s3c_fb_remove() - Cleanup on module finalisation
1059  * @pdev: The platform device we are bound to.
1060  *
1061  * Shutdown and then release all the resources that the driver allocated
1062  * on initialisation.
1063  */
1064 static int __devexit s3c_fb_remove(struct platform_device *pdev)
1065 {
1066         struct s3c_fb *sfb = platform_get_drvdata(pdev);
1067         int win;
1068
1069         for (win = 0; win < S3C_FB_MAX_WIN; win++)
1070                 if (sfb->windows[win])
1071                         s3c_fb_release_win(sfb, sfb->windows[win]);
1072
1073         iounmap(sfb->regs);
1074
1075         clk_disable(sfb->bus_clk);
1076         clk_put(sfb->bus_clk);
1077
1078         release_resource(sfb->regs_res);
1079         kfree(sfb->regs_res);
1080
1081         kfree(sfb);
1082
1083         return 0;
1084 }
1085
1086 #ifdef CONFIG_PM
1087 static int s3c_fb_suspend(struct platform_device *pdev, pm_message_t state)
1088 {
1089         struct s3c_fb *sfb = platform_get_drvdata(pdev);
1090         struct s3c_fb_win *win;
1091         int win_no;
1092
1093         for (win_no = S3C_FB_MAX_WIN - 1; win_no >= 0; win_no--) {
1094                 win = sfb->windows[win_no];
1095                 if (!win)
1096                         continue;
1097
1098                 /* use the blank function to push into power-down */
1099                 s3c_fb_blank(FB_BLANK_POWERDOWN, win->fbinfo);
1100         }
1101
1102         clk_disable(sfb->bus_clk);
1103         return 0;
1104 }
1105
1106 static int s3c_fb_resume(struct platform_device *pdev)
1107 {
1108         struct s3c_fb *sfb = platform_get_drvdata(pdev);
1109         struct s3c_fb_platdata *pd = sfb->pdata;
1110         struct s3c_fb_win *win;
1111         int win_no;
1112
1113         clk_enable(sfb->bus_clk);
1114
1115         /* setup registers */
1116         writel(pd->vidcon1, sfb->regs + VIDCON1);
1117
1118         /* zero all windows before we do anything */
1119         for (win_no = 0; win_no < sfb->variant.nr_windows; win_no++)
1120                 s3c_fb_clear_win(sfb, win_no);
1121
1122         for (win_no = 0; win_no < sfb->variant.nr_windows - 1; win_no++) {
1123                 void __iomem *regs = sfb->regs + sfb->variant.keycon;
1124
1125                 regs += (win_no * 8);
1126                 writel(0xffffff, regs + WKEYCON0);
1127                 writel(0xffffff, regs + WKEYCON1);
1128         }
1129
1130         /* restore framebuffers */
1131         for (win_no = 0; win_no < S3C_FB_MAX_WIN; win_no++) {
1132                 win = sfb->windows[win_no];
1133                 if (!win)
1134                         continue;
1135
1136                 dev_dbg(&pdev->dev, "resuming window %d\n", win_no);
1137                 s3c_fb_set_par(win->fbinfo);
1138         }
1139
1140         return 0;
1141 }
1142 #else
1143 #define s3c_fb_suspend NULL
1144 #define s3c_fb_resume  NULL
1145 #endif
1146
1147
1148 #define VALID_BPP124 (VALID_BPP(1) | VALID_BPP(2) | VALID_BPP(4))
1149 #define VALID_BPP1248 (VALID_BPP124 | VALID_BPP(8))
1150
1151 static struct s3c_fb_win_variant s3c_fb_data_64xx_wins[] __devinitdata = {
1152         [0] = {
1153                 .has_osd_c      = 1,
1154                 .palette_sz     = 256,
1155                 .valid_bpp      = VALID_BPP1248 | VALID_BPP(16) | VALID_BPP(24),
1156         },
1157         [1] = {
1158                 .has_osd_c      = 1,
1159                 .has_osd_d      = 1,
1160                 .palette_sz     = 256,
1161                 .valid_bpp      = (VALID_BPP1248 | VALID_BPP(16) |
1162                                    VALID_BPP(18) | VALID_BPP(19) |
1163                                    VALID_BPP(24) | VALID_BPP(25)),
1164         },
1165         [2] = {
1166                 .has_osd_c      = 1,
1167                 .has_osd_d      = 1,
1168                 .palette_sz     = 16,
1169                 .palette_16bpp  = 1,
1170                 .valid_bpp      = (VALID_BPP1248 | VALID_BPP(16) |
1171                                    VALID_BPP(18) | VALID_BPP(19) |
1172                                    VALID_BPP(24) | VALID_BPP(25)),
1173         },
1174         [3] = {
1175                 .has_osd_c      = 1,
1176                 .has_osd_d      = 1,
1177                 .palette_sz     = 16,
1178                 .palette_16bpp  = 1,
1179                 .valid_bpp      = (VALID_BPP124  | VALID_BPP(16) |
1180                                    VALID_BPP(18) | VALID_BPP(19) |
1181                                    VALID_BPP(24) | VALID_BPP(25)),
1182         },
1183         [4] = {
1184                 .has_osd_c      = 1,
1185                 .palette_sz     = 4,
1186                 .palette_16bpp  = 1,
1187                 .valid_bpp      = (VALID_BPP(1) | VALID_BPP(2) |
1188                                    VALID_BPP(16) | VALID_BPP(18) |
1189                                    VALID_BPP(24) | VALID_BPP(25)),
1190         },
1191 };
1192
1193 static struct s3c_fb_driverdata s3c_fb_data_64xx __devinitdata = {
1194         .variant = {
1195                 .nr_windows     = 5,
1196                 .vidtcon        = VIDTCON0,
1197                 .wincon         = WINCON(0),
1198                 .winmap         = WINxMAP(0),
1199                 .keycon         = WKEYCON,
1200                 .osd            = VIDOSD_BASE,
1201                 .osd_stride     = 16,
1202                 .buf_start      = VIDW_BUF_START(0),
1203                 .buf_size       = VIDW_BUF_SIZE(0),
1204                 .buf_end        = VIDW_BUF_END(0),
1205
1206                 .palette = {
1207                         [0] = 0x400,
1208                         [1] = 0x800,
1209                         [2] = 0x300,
1210                         [3] = 0x320,
1211                         [4] = 0x340,
1212                 },
1213         },
1214         .win[0] = &s3c_fb_data_64xx_wins[0],
1215         .win[1] = &s3c_fb_data_64xx_wins[1],
1216         .win[2] = &s3c_fb_data_64xx_wins[2],
1217         .win[3] = &s3c_fb_data_64xx_wins[3],
1218         .win[4] = &s3c_fb_data_64xx_wins[4],
1219 };
1220
1221 static struct s3c_fb_driverdata s3c_fb_data_s5p __devinitdata = {
1222         .variant = {
1223                 .nr_windows     = 5,
1224                 .vidtcon        = VIDTCON0,
1225                 .wincon         = WINCON(0),
1226                 .winmap         = WINxMAP(0),
1227                 .keycon         = WKEYCON,
1228                 .osd            = VIDOSD_BASE,
1229                 .osd_stride     = 16,
1230                 .buf_start      = VIDW_BUF_START(0),
1231                 .buf_size       = VIDW_BUF_SIZE(0),
1232                 .buf_end        = VIDW_BUF_END(0),
1233
1234                 .palette = {
1235                         [0] = 0x2400,
1236                         [1] = 0x2800,
1237                         [2] = 0x2c00,
1238                         [3] = 0x3000,
1239                         [4] = 0x3400,
1240                 },
1241         },
1242         .win[0] = &s3c_fb_data_64xx_wins[0],
1243         .win[1] = &s3c_fb_data_64xx_wins[1],
1244         .win[2] = &s3c_fb_data_64xx_wins[2],
1245         .win[3] = &s3c_fb_data_64xx_wins[3],
1246         .win[4] = &s3c_fb_data_64xx_wins[4],
1247 };
1248
1249 /* S3C2443/S3C2416 style hardware */
1250 static struct s3c_fb_driverdata s3c_fb_data_s3c2443 __devinitdata = {
1251         .variant = {
1252                 .nr_windows     = 2,
1253                 .is_2443        = 1,
1254
1255                 .vidtcon        = 0x08,
1256                 .wincon         = 0x14,
1257                 .winmap         = 0xd0,
1258                 .keycon         = 0xb0,
1259                 .osd            = 0x28,
1260                 .osd_stride     = 12,
1261                 .buf_start      = 0x64,
1262                 .buf_size       = 0x94,
1263                 .buf_end        = 0x7c,
1264
1265                 .palette = {
1266                         [0] = 0x400,
1267                         [1] = 0x800,
1268                 },
1269         },
1270         .win[0] = &(struct s3c_fb_win_variant) {
1271                 .palette_sz     = 256,
1272                 .valid_bpp      = VALID_BPP1248 | VALID_BPP(16) | VALID_BPP(24),
1273         },
1274         .win[1] = &(struct s3c_fb_win_variant) {
1275                 .has_osd_c      = 1,
1276                 .palette_sz     = 256,
1277                 .valid_bpp      = (VALID_BPP1248 | VALID_BPP(16) |
1278                                    VALID_BPP(18) | VALID_BPP(19) |
1279                                    VALID_BPP(24) | VALID_BPP(25) |
1280                                    VALID_BPP(28)),
1281         },
1282 };
1283
1284 static struct platform_device_id s3c_fb_driver_ids[] = {
1285         {
1286                 .name           = "s3c-fb",
1287                 .driver_data    = (unsigned long)&s3c_fb_data_64xx,
1288         }, {
1289                 .name           = "s5p-fb",
1290                 .driver_data    = (unsigned long)&s3c_fb_data_s5p,
1291         }, {
1292                 .name           = "s3c2443-fb",
1293                 .driver_data    = (unsigned long)&s3c_fb_data_s3c2443,
1294         },
1295         {},
1296 };
1297 MODULE_DEVICE_TABLE(platform, s3c_fb_driver_ids);
1298
1299 static struct platform_driver s3c_fb_driver = {
1300         .probe          = s3c_fb_probe,
1301         .remove         = __devexit_p(s3c_fb_remove),
1302         .suspend        = s3c_fb_suspend,
1303         .resume         = s3c_fb_resume,
1304         .id_table       = s3c_fb_driver_ids,
1305         .driver         = {
1306                 .name   = "s3c-fb",
1307                 .owner  = THIS_MODULE,
1308         },
1309 };
1310
1311 static int __init s3c_fb_init(void)
1312 {
1313         return platform_driver_register(&s3c_fb_driver);
1314 }
1315
1316 static void __exit s3c_fb_cleanup(void)
1317 {
1318         platform_driver_unregister(&s3c_fb_driver);
1319 }
1320
1321 module_init(s3c_fb_init);
1322 module_exit(s3c_fb_cleanup);
1323
1324 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
1325 MODULE_DESCRIPTION("Samsung S3C SoC Framebuffer driver");
1326 MODULE_LICENSE("GPL");
1327 MODULE_ALIAS("platform:s3c-fb");