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17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/errno.h>
20#include <linux/string.h>
21#include <linux/interrupt.h>
22#include <linux/slab.h>
23#include <linux/mm.h>
24#include <linux/fb.h>
25#include <linux/delay.h>
26#include <linux/init.h>
27#include <linux/ioport.h>
28#include <linux/cpufreq.h>
29#include <linux/clk.h>
30#include <linux/platform_device.h>
31#include <linux/dma-mapping.h>
32#include <linux/io.h>
33#include <linux/math64.h>
34
35#include <mach/imxfb.h>
36#include <mach/hardware.h>
37
38
39
40
41#define DEBUG_VAR 1
42
43#define DRIVER_NAME "imx-fb"
44
45#define LCDC_SSA 0x00
46
47#define LCDC_SIZE 0x04
48#define SIZE_XMAX(x) ((((x) >> 4) & 0x3f) << 20)
49
50#ifdef CONFIG_ARCH_MX1
51#define SIZE_YMAX(y) ((y) & 0x1ff)
52#else
53#define SIZE_YMAX(y) ((y) & 0x3ff)
54#endif
55
56#define LCDC_VPW 0x08
57#define VPW_VPW(x) ((x) & 0x3ff)
58
59#define LCDC_CPOS 0x0C
60#define CPOS_CC1 (1<<31)
61#define CPOS_CC0 (1<<30)
62#define CPOS_OP (1<<28)
63#define CPOS_CXP(x) (((x) & 3ff) << 16)
64
65#ifdef CONFIG_ARCH_MX1
66#define CPOS_CYP(y) ((y) & 0x1ff)
67#else
68#define CPOS_CYP(y) ((y) & 0x3ff)
69#endif
70
71#define LCDC_LCWHB 0x10
72#define LCWHB_BK_EN (1<<31)
73#define LCWHB_CW(w) (((w) & 0x1f) << 24)
74#define LCWHB_CH(h) (((h) & 0x1f) << 16)
75#define LCWHB_BD(x) ((x) & 0xff)
76
77#define LCDC_LCHCC 0x14
78
79#ifdef CONFIG_ARCH_MX1
80#define LCHCC_CUR_COL_R(r) (((r) & 0x1f) << 11)
81#define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 5)
82#define LCHCC_CUR_COL_B(b) ((b) & 0x1f)
83#else
84#define LCHCC_CUR_COL_R(r) (((r) & 0x3f) << 12)
85#define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 6)
86#define LCHCC_CUR_COL_B(b) ((b) & 0x3f)
87#endif
88
89#define LCDC_PCR 0x18
90
91#define LCDC_HCR 0x1C
92#define HCR_H_WIDTH(x) (((x) & 0x3f) << 26)
93#define HCR_H_WAIT_1(x) (((x) & 0xff) << 8)
94#define HCR_H_WAIT_2(x) ((x) & 0xff)
95
96#define LCDC_VCR 0x20
97#define VCR_V_WIDTH(x) (((x) & 0x3f) << 26)
98#define VCR_V_WAIT_1(x) (((x) & 0xff) << 8)
99#define VCR_V_WAIT_2(x) ((x) & 0xff)
100
101#define LCDC_POS 0x24
102#define POS_POS(x) ((x) & 1f)
103
104#define LCDC_LSCR1 0x28
105
106
107#define LCDC_PWMR 0x2C
108
109
110#define LCDC_DMACR 0x30
111
112
113#define LCDC_RMCR 0x34
114
115#ifdef CONFIG_ARCH_MX1
116#define RMCR_LCDC_EN (1<<1)
117#else
118#define RMCR_LCDC_EN 0
119#endif
120
121#define RMCR_SELF_REF (1<<0)
122
123#define LCDC_LCDICR 0x38
124#define LCDICR_INT_SYN (1<<2)
125#define LCDICR_INT_CON (1)
126
127#define LCDC_LCDISR 0x40
128#define LCDISR_UDR_ERR (1<<3)
129#define LCDISR_ERR_RES (1<<2)
130#define LCDISR_EOF (1<<1)
131#define LCDISR_BOF (1<<0)
132
133
134static const char *fb_mode;
135
136
137
138
139
140
141struct imxfb_rgb {
142 struct fb_bitfield red;
143 struct fb_bitfield green;
144 struct fb_bitfield blue;
145 struct fb_bitfield transp;
146};
147
148struct imxfb_info {
149 struct platform_device *pdev;
150 void __iomem *regs;
151 struct clk *clk;
152
153
154
155
156
157 dma_addr_t map_dma;
158 u_char *map_cpu;
159 u_int map_size;
160
161 u_char *screen_cpu;
162 dma_addr_t screen_dma;
163 u_int palette_size;
164
165 dma_addr_t dbar1;
166 dma_addr_t dbar2;
167
168 u_int pcr;
169 u_int pwmr;
170 u_int lscr1;
171 u_int dmacr;
172 u_int cmap_inverse:1,
173 cmap_static:1,
174 unused:30;
175
176 struct imx_fb_videomode *mode;
177 int num_modes;
178
179 void (*lcd_power)(int);
180 void (*backlight_power)(int);
181};
182
183#define IMX_NAME "IMX"
184
185
186
187
188#define MIN_XRES 64
189#define MIN_YRES 64
190
191
192
193
194
195static struct imxfb_rgb def_rgb_18 = {
196 .red = {.offset = 16, .length = 8,},
197 .green = {.offset = 8, .length = 8,},
198 .blue = {.offset = 0, .length = 8,},
199 .transp = {.offset = 0, .length = 0,},
200};
201
202static struct imxfb_rgb def_rgb_16_tft = {
203 .red = {.offset = 11, .length = 5,},
204 .green = {.offset = 5, .length = 6,},
205 .blue = {.offset = 0, .length = 5,},
206 .transp = {.offset = 0, .length = 0,},
207};
208
209static struct imxfb_rgb def_rgb_16_stn = {
210 .red = {.offset = 8, .length = 4,},
211 .green = {.offset = 4, .length = 4,},
212 .blue = {.offset = 0, .length = 4,},
213 .transp = {.offset = 0, .length = 0,},
214};
215
216static struct imxfb_rgb def_rgb_8 = {
217 .red = {.offset = 0, .length = 8,},
218 .green = {.offset = 0, .length = 8,},
219 .blue = {.offset = 0, .length = 8,},
220 .transp = {.offset = 0, .length = 0,},
221};
222
223static int imxfb_activate_var(struct fb_var_screeninfo *var,
224 struct fb_info *info);
225
226static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
227{
228 chan &= 0xffff;
229 chan >>= 16 - bf->length;
230 return chan << bf->offset;
231}
232
233static int imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
234 u_int trans, struct fb_info *info)
235{
236 struct imxfb_info *fbi = info->par;
237 u_int val, ret = 1;
238
239#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
240 if (regno < fbi->palette_size) {
241 val = (CNVT_TOHW(red, 4) << 8) |
242 (CNVT_TOHW(green,4) << 4) |
243 CNVT_TOHW(blue, 4);
244
245 writel(val, fbi->regs + 0x800 + (regno << 2));
246 ret = 0;
247 }
248 return ret;
249}
250
251static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
252 u_int trans, struct fb_info *info)
253{
254 struct imxfb_info *fbi = info->par;
255 unsigned int val;
256 int ret = 1;
257
258
259
260
261
262
263
264 if (fbi->cmap_inverse) {
265 red = 0xffff - red;
266 green = 0xffff - green;
267 blue = 0xffff - blue;
268 }
269
270
271
272
273
274 if (info->var.grayscale)
275 red = green = blue = (19595 * red + 38470 * green +
276 7471 * blue) >> 16;
277
278 switch (info->fix.visual) {
279 case FB_VISUAL_TRUECOLOR:
280
281
282
283
284 if (regno < 16) {
285 u32 *pal = info->pseudo_palette;
286
287 val = chan_to_field(red, &info->var.red);
288 val |= chan_to_field(green, &info->var.green);
289 val |= chan_to_field(blue, &info->var.blue);
290
291 pal[regno] = val;
292 ret = 0;
293 }
294 break;
295
296 case FB_VISUAL_STATIC_PSEUDOCOLOR:
297 case FB_VISUAL_PSEUDOCOLOR:
298 ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
299 break;
300 }
301
302 return ret;
303}
304
305static const struct imx_fb_videomode *imxfb_find_mode(struct imxfb_info *fbi)
306{
307 struct imx_fb_videomode *m;
308 int i;
309
310 for (i = 0, m = &fbi->mode[0]; i < fbi->num_modes; i++, m++) {
311 if (!strcmp(m->mode.name, fb_mode))
312 return m;
313 }
314 return NULL;
315}
316
317
318
319
320
321
322
323static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
324{
325 struct imxfb_info *fbi = info->par;
326 struct imxfb_rgb *rgb;
327 const struct imx_fb_videomode *imxfb_mode;
328 unsigned long lcd_clk;
329 unsigned long long tmp;
330 u32 pcr = 0;
331
332 if (var->xres < MIN_XRES)
333 var->xres = MIN_XRES;
334 if (var->yres < MIN_YRES)
335 var->yres = MIN_YRES;
336
337 imxfb_mode = imxfb_find_mode(fbi);
338 if (!imxfb_mode)
339 return -EINVAL;
340
341 var->xres = imxfb_mode->mode.xres;
342 var->yres = imxfb_mode->mode.yres;
343 var->bits_per_pixel = imxfb_mode->bpp;
344 var->pixclock = imxfb_mode->mode.pixclock;
345 var->hsync_len = imxfb_mode->mode.hsync_len;
346 var->left_margin = imxfb_mode->mode.left_margin;
347 var->right_margin = imxfb_mode->mode.right_margin;
348 var->vsync_len = imxfb_mode->mode.vsync_len;
349 var->upper_margin = imxfb_mode->mode.upper_margin;
350 var->lower_margin = imxfb_mode->mode.lower_margin;
351 var->sync = imxfb_mode->mode.sync;
352 var->xres_virtual = max(var->xres_virtual, var->xres);
353 var->yres_virtual = max(var->yres_virtual, var->yres);
354
355 pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
356
357 lcd_clk = clk_get_rate(fbi->clk);
358
359 tmp = var->pixclock * (unsigned long long)lcd_clk;
360
361 do_div(tmp, 1000000);
362
363 if (do_div(tmp, 1000000) > 500000)
364 tmp++;
365
366 pcr = (unsigned int)tmp;
367
368 if (--pcr > 0x3F) {
369 pcr = 0x3F;
370 printk(KERN_WARNING "Must limit pixel clock to %luHz\n",
371 lcd_clk / pcr);
372 }
373
374 switch (var->bits_per_pixel) {
375 case 32:
376 pcr |= PCR_BPIX_18;
377 rgb = &def_rgb_18;
378 break;
379 case 16:
380 default:
381 if (cpu_is_mx1())
382 pcr |= PCR_BPIX_12;
383 else
384 pcr |= PCR_BPIX_16;
385
386 if (imxfb_mode->pcr & PCR_TFT)
387 rgb = &def_rgb_16_tft;
388 else
389 rgb = &def_rgb_16_stn;
390 break;
391 case 8:
392 pcr |= PCR_BPIX_8;
393 rgb = &def_rgb_8;
394 break;
395 }
396
397
398 pcr |= imxfb_mode->pcr & ~(0x3f | (7 << 25));
399
400 fbi->pcr = pcr;
401
402
403
404
405
406 var->red = rgb->red;
407 var->green = rgb->green;
408 var->blue = rgb->blue;
409 var->transp = rgb->transp;
410
411 pr_debug("RGBT length = %d:%d:%d:%d\n",
412 var->red.length, var->green.length, var->blue.length,
413 var->transp.length);
414
415 pr_debug("RGBT offset = %d:%d:%d:%d\n",
416 var->red.offset, var->green.offset, var->blue.offset,
417 var->transp.offset);
418
419 return 0;
420}
421
422
423
424
425
426static int imxfb_set_par(struct fb_info *info)
427{
428 struct imxfb_info *fbi = info->par;
429 struct fb_var_screeninfo *var = &info->var;
430
431 if (var->bits_per_pixel == 16 || var->bits_per_pixel == 32)
432 info->fix.visual = FB_VISUAL_TRUECOLOR;
433 else if (!fbi->cmap_static)
434 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
435 else {
436
437
438
439
440
441 info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
442 }
443
444 info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
445 fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
446
447 imxfb_activate_var(var, info);
448
449 return 0;
450}
451
452static void imxfb_enable_controller(struct imxfb_info *fbi)
453{
454 pr_debug("Enabling LCD controller\n");
455
456 writel(fbi->screen_dma, fbi->regs + LCDC_SSA);
457
458
459 writel(0x00000000, fbi->regs + LCDC_POS);
460
461
462 writel(readl(fbi->regs + LCDC_CPOS) & ~(CPOS_CC0 | CPOS_CC1),
463 fbi->regs + LCDC_CPOS);
464
465 writel(RMCR_LCDC_EN, fbi->regs + LCDC_RMCR);
466
467 clk_enable(fbi->clk);
468
469 if (fbi->backlight_power)
470 fbi->backlight_power(1);
471 if (fbi->lcd_power)
472 fbi->lcd_power(1);
473}
474
475static void imxfb_disable_controller(struct imxfb_info *fbi)
476{
477 pr_debug("Disabling LCD controller\n");
478
479 if (fbi->backlight_power)
480 fbi->backlight_power(0);
481 if (fbi->lcd_power)
482 fbi->lcd_power(0);
483
484 clk_disable(fbi->clk);
485
486 writel(0, fbi->regs + LCDC_RMCR);
487}
488
489static int imxfb_blank(int blank, struct fb_info *info)
490{
491 struct imxfb_info *fbi = info->par;
492
493 pr_debug("imxfb_blank: blank=%d\n", blank);
494
495 switch (blank) {
496 case FB_BLANK_POWERDOWN:
497 case FB_BLANK_VSYNC_SUSPEND:
498 case FB_BLANK_HSYNC_SUSPEND:
499 case FB_BLANK_NORMAL:
500 imxfb_disable_controller(fbi);
501 break;
502
503 case FB_BLANK_UNBLANK:
504 imxfb_enable_controller(fbi);
505 break;
506 }
507 return 0;
508}
509
510static struct fb_ops imxfb_ops = {
511 .owner = THIS_MODULE,
512 .fb_check_var = imxfb_check_var,
513 .fb_set_par = imxfb_set_par,
514 .fb_setcolreg = imxfb_setcolreg,
515 .fb_fillrect = cfb_fillrect,
516 .fb_copyarea = cfb_copyarea,
517 .fb_imageblit = cfb_imageblit,
518 .fb_blank = imxfb_blank,
519};
520
521
522
523
524
525
526static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
527{
528 struct imxfb_info *fbi = info->par;
529
530 pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
531 var->xres, var->hsync_len,
532 var->left_margin, var->right_margin);
533 pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
534 var->yres, var->vsync_len,
535 var->upper_margin, var->lower_margin);
536
537#if DEBUG_VAR
538 if (var->xres < 16 || var->xres > 1024)
539 printk(KERN_ERR "%s: invalid xres %d\n",
540 info->fix.id, var->xres);
541 if (var->hsync_len < 1 || var->hsync_len > 64)
542 printk(KERN_ERR "%s: invalid hsync_len %d\n",
543 info->fix.id, var->hsync_len);
544 if (var->left_margin > 255)
545 printk(KERN_ERR "%s: invalid left_margin %d\n",
546 info->fix.id, var->left_margin);
547 if (var->right_margin > 255)
548 printk(KERN_ERR "%s: invalid right_margin %d\n",
549 info->fix.id, var->right_margin);
550 if (var->yres < 1 || var->yres > 511)
551 printk(KERN_ERR "%s: invalid yres %d\n",
552 info->fix.id, var->yres);
553 if (var->vsync_len > 100)
554 printk(KERN_ERR "%s: invalid vsync_len %d\n",
555 info->fix.id, var->vsync_len);
556 if (var->upper_margin > 63)
557 printk(KERN_ERR "%s: invalid upper_margin %d\n",
558 info->fix.id, var->upper_margin);
559 if (var->lower_margin > 255)
560 printk(KERN_ERR "%s: invalid lower_margin %d\n",
561 info->fix.id, var->lower_margin);
562#endif
563
564
565 writel(VPW_VPW(var->xres * var->bits_per_pixel / 8 / 4),
566 fbi->regs + LCDC_VPW);
567
568 writel(HCR_H_WIDTH(var->hsync_len - 1) |
569 HCR_H_WAIT_1(var->right_margin - 1) |
570 HCR_H_WAIT_2(var->left_margin - 3),
571 fbi->regs + LCDC_HCR);
572
573 writel(VCR_V_WIDTH(var->vsync_len) |
574 VCR_V_WAIT_1(var->lower_margin) |
575 VCR_V_WAIT_2(var->upper_margin),
576 fbi->regs + LCDC_VCR);
577
578 writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres),
579 fbi->regs + LCDC_SIZE);
580
581 writel(fbi->pcr, fbi->regs + LCDC_PCR);
582 writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
583 writel(fbi->lscr1, fbi->regs + LCDC_LSCR1);
584 writel(fbi->dmacr, fbi->regs + LCDC_DMACR);
585
586 return 0;
587}
588
589#ifdef CONFIG_PM
590
591
592
593
594static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
595{
596 struct imxfb_info *fbi = platform_get_drvdata(dev);
597
598 pr_debug("%s\n", __func__);
599
600 imxfb_disable_controller(fbi);
601 return 0;
602}
603
604static int imxfb_resume(struct platform_device *dev)
605{
606 struct imxfb_info *fbi = platform_get_drvdata(dev);
607
608 pr_debug("%s\n", __func__);
609
610 imxfb_enable_controller(fbi);
611 return 0;
612}
613#else
614#define imxfb_suspend NULL
615#define imxfb_resume NULL
616#endif
617
618static int __init imxfb_init_fbinfo(struct platform_device *pdev)
619{
620 struct imx_fb_platform_data *pdata = pdev->dev.platform_data;
621 struct fb_info *info = dev_get_drvdata(&pdev->dev);
622 struct imxfb_info *fbi = info->par;
623 struct imx_fb_videomode *m;
624 int i;
625
626 pr_debug("%s\n",__func__);
627
628 info->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
629 if (!info->pseudo_palette)
630 return -ENOMEM;
631
632 memset(fbi, 0, sizeof(struct imxfb_info));
633
634 strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
635
636 info->fix.type = FB_TYPE_PACKED_PIXELS;
637 info->fix.type_aux = 0;
638 info->fix.xpanstep = 0;
639 info->fix.ypanstep = 0;
640 info->fix.ywrapstep = 0;
641 info->fix.accel = FB_ACCEL_NONE;
642
643 info->var.nonstd = 0;
644 info->var.activate = FB_ACTIVATE_NOW;
645 info->var.height = -1;
646 info->var.width = -1;
647 info->var.accel_flags = 0;
648 info->var.vmode = FB_VMODE_NONINTERLACED;
649
650 info->fbops = &imxfb_ops;
651 info->flags = FBINFO_FLAG_DEFAULT |
652 FBINFO_READS_FAST;
653 info->var.grayscale = pdata->cmap_greyscale;
654 fbi->cmap_inverse = pdata->cmap_inverse;
655 fbi->cmap_static = pdata->cmap_static;
656 fbi->lscr1 = pdata->lscr1;
657 fbi->dmacr = pdata->dmacr;
658 fbi->pwmr = pdata->pwmr;
659 fbi->lcd_power = pdata->lcd_power;
660 fbi->backlight_power = pdata->backlight_power;
661
662 for (i = 0, m = &pdata->mode[0]; i < pdata->num_modes; i++, m++)
663 info->fix.smem_len = max_t(size_t, info->fix.smem_len,
664 m->mode.xres * m->mode.yres * m->bpp / 8);
665
666 return 0;
667}
668
669static int __init imxfb_probe(struct platform_device *pdev)
670{
671 struct imxfb_info *fbi;
672 struct fb_info *info;
673 struct imx_fb_platform_data *pdata;
674 struct resource *res;
675 int ret, i;
676
677 dev_info(&pdev->dev, "i.MX Framebuffer driver\n");
678
679 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
680 if (!res)
681 return -ENODEV;
682
683 pdata = pdev->dev.platform_data;
684 if (!pdata) {
685 dev_err(&pdev->dev,"No platform_data available\n");
686 return -ENOMEM;
687 }
688
689 info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
690 if (!info)
691 return -ENOMEM;
692
693 fbi = info->par;
694
695 if (!fb_mode)
696 fb_mode = pdata->mode[0].mode.name;
697
698 platform_set_drvdata(pdev, info);
699
700 ret = imxfb_init_fbinfo(pdev);
701 if (ret < 0)
702 goto failed_init;
703
704 res = request_mem_region(res->start, resource_size(res),
705 DRIVER_NAME);
706 if (!res) {
707 ret = -EBUSY;
708 goto failed_req;
709 }
710
711 fbi->clk = clk_get(&pdev->dev, NULL);
712 if (IS_ERR(fbi->clk)) {
713 ret = PTR_ERR(fbi->clk);
714 dev_err(&pdev->dev, "unable to get clock: %d\n", ret);
715 goto failed_getclock;
716 }
717
718 fbi->regs = ioremap(res->start, resource_size(res));
719 if (fbi->regs == NULL) {
720 dev_err(&pdev->dev, "Cannot map frame buffer registers\n");
721 goto failed_ioremap;
722 }
723
724 if (!pdata->fixed_screen_cpu) {
725 fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
726 fbi->map_cpu = dma_alloc_writecombine(&pdev->dev,
727 fbi->map_size, &fbi->map_dma, GFP_KERNEL);
728
729 if (!fbi->map_cpu) {
730 dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
731 ret = -ENOMEM;
732 goto failed_map;
733 }
734
735 info->screen_base = fbi->map_cpu;
736 fbi->screen_cpu = fbi->map_cpu;
737 fbi->screen_dma = fbi->map_dma;
738 info->fix.smem_start = fbi->screen_dma;
739 } else {
740
741 fbi->map_cpu = pdata->fixed_screen_cpu;
742 fbi->map_dma = pdata->fixed_screen_dma;
743 info->screen_base = fbi->map_cpu;
744 fbi->screen_cpu = fbi->map_cpu;
745 fbi->screen_dma = fbi->map_dma;
746 info->fix.smem_start = fbi->screen_dma;
747 }
748
749 if (pdata->init) {
750 ret = pdata->init(fbi->pdev);
751 if (ret)
752 goto failed_platform_init;
753 }
754
755 fbi->mode = pdata->mode;
756 fbi->num_modes = pdata->num_modes;
757
758 INIT_LIST_HEAD(&info->modelist);
759 for (i = 0; i < pdata->num_modes; i++)
760 fb_add_videomode(&pdata->mode[i].mode, &info->modelist);
761
762
763
764
765
766 imxfb_check_var(&info->var, info);
767
768 ret = fb_alloc_cmap(&info->cmap, 1 << info->var.bits_per_pixel, 0);
769 if (ret < 0)
770 goto failed_cmap;
771
772 imxfb_set_par(info);
773 ret = register_framebuffer(info);
774 if (ret < 0) {
775 dev_err(&pdev->dev, "failed to register framebuffer\n");
776 goto failed_register;
777 }
778
779 imxfb_enable_controller(fbi);
780
781 return 0;
782
783failed_register:
784 fb_dealloc_cmap(&info->cmap);
785failed_cmap:
786 if (pdata->exit)
787 pdata->exit(fbi->pdev);
788failed_platform_init:
789 if (!pdata->fixed_screen_cpu)
790 dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
791 fbi->map_dma);
792failed_map:
793 clk_put(fbi->clk);
794failed_getclock:
795 iounmap(fbi->regs);
796failed_ioremap:
797 release_mem_region(res->start, resource_size(res));
798failed_req:
799 kfree(info->pseudo_palette);
800failed_init:
801 platform_set_drvdata(pdev, NULL);
802 framebuffer_release(info);
803 return ret;
804}
805
806static int __devexit imxfb_remove(struct platform_device *pdev)
807{
808 struct imx_fb_platform_data *pdata;
809 struct fb_info *info = platform_get_drvdata(pdev);
810 struct imxfb_info *fbi = info->par;
811 struct resource *res;
812
813 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
814
815 imxfb_disable_controller(fbi);
816
817 unregister_framebuffer(info);
818
819 pdata = pdev->dev.platform_data;
820 if (pdata->exit)
821 pdata->exit(fbi->pdev);
822
823 fb_dealloc_cmap(&info->cmap);
824 kfree(info->pseudo_palette);
825 framebuffer_release(info);
826
827 iounmap(fbi->regs);
828 release_mem_region(res->start, resource_size(res));
829 clk_disable(fbi->clk);
830 clk_put(fbi->clk);
831
832 platform_set_drvdata(pdev, NULL);
833
834 return 0;
835}
836
837void imxfb_shutdown(struct platform_device * dev)
838{
839 struct fb_info *info = platform_get_drvdata(dev);
840 struct imxfb_info *fbi = info->par;
841 imxfb_disable_controller(fbi);
842}
843
844static struct platform_driver imxfb_driver = {
845 .suspend = imxfb_suspend,
846 .resume = imxfb_resume,
847 .remove = __devexit_p(imxfb_remove),
848 .shutdown = imxfb_shutdown,
849 .driver = {
850 .name = DRIVER_NAME,
851 },
852};
853
854static int imxfb_setup(void)
855{
856#ifndef MODULE
857 char *opt, *options = NULL;
858
859 if (fb_get_options("imxfb", &options))
860 return -ENODEV;
861
862 if (!options || !*options)
863 return 0;
864
865 while ((opt = strsep(&options, ",")) != NULL) {
866 if (!*opt)
867 continue;
868 else
869 fb_mode = opt;
870 }
871#endif
872 return 0;
873}
874
875int __init imxfb_init(void)
876{
877 int ret = imxfb_setup();
878
879 if (ret < 0)
880 return ret;
881
882 return platform_driver_probe(&imxfb_driver, imxfb_probe);
883}
884
885static void __exit imxfb_cleanup(void)
886{
887 platform_driver_unregister(&imxfb_driver);
888}
889
890module_init(imxfb_init);
891module_exit(imxfb_cleanup);
892
893MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
894MODULE_AUTHOR("Sascha Hauer, Pengutronix");
895MODULE_LICENSE("GPL");
896