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ocfs2: Fix a bug found by sparse check.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / imxfb.c
1 /*
2 * Freescale i.MX Frame Buffer device driver
3 *
4 * Copyright (C) 2004 Sascha Hauer, Pengutronix
5 * Based on acornfb.c Copyright (C) Russell King.
6 *
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file COPYING in the main directory of this archive for
9 * more details.
10 *
11 * Please direct your questions and comments on this driver to the following
12 * email address:
13 *
14 * linux-arm-kernel@lists.arm.linux.org.uk
15 */
16
17
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/string.h>
22 #include <linux/interrupt.h>
23 #include <linux/slab.h>
24 #include <linux/mm.h>
25 #include <linux/fb.h>
26 #include <linux/delay.h>
27 #include <linux/init.h>
28 #include <linux/ioport.h>
29 #include <linux/cpufreq.h>
30 #include <linux/platform_device.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/io.h>
33
34 #include <mach/imxfb.h>
35
36 /*
37 * Complain if VAR is out of range.
38 */
39 #define DEBUG_VAR 1
40
41 #define DRIVER_NAME "imx-fb"
42
43 #define LCDC_SSA 0x00
44
45 #define LCDC_SIZE 0x04
46 #define SIZE_XMAX(x) ((((x) >> 4) & 0x3f) << 20)
47 #define SIZE_YMAX(y) ((y) & 0x1ff)
48
49 #define LCDC_VPW 0x08
50 #define VPW_VPW(x) ((x) & 0x3ff)
51
52 #define LCDC_CPOS 0x0C
53 #define CPOS_CC1 (1<<31)
54 #define CPOS_CC0 (1<<30)
55 #define CPOS_OP (1<<28)
56 #define CPOS_CXP(x) (((x) & 3ff) << 16)
57 #define CPOS_CYP(y) ((y) & 0x1ff)
58
59 #define LCDC_LCWHB 0x10
60 #define LCWHB_BK_EN (1<<31)
61 #define LCWHB_CW(w) (((w) & 0x1f) << 24)
62 #define LCWHB_CH(h) (((h) & 0x1f) << 16)
63 #define LCWHB_BD(x) ((x) & 0xff)
64
65 #define LCDC_LCHCC 0x14
66 #define LCHCC_CUR_COL_R(r) (((r) & 0x1f) << 11)
67 #define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 5)
68 #define LCHCC_CUR_COL_B(b) ((b) & 0x1f)
69
70 #define LCDC_PCR 0x18
71
72 #define LCDC_HCR 0x1C
73 #define HCR_H_WIDTH(x) (((x) & 0x3f) << 26)
74 #define HCR_H_WAIT_1(x) (((x) & 0xff) << 8)
75 #define HCR_H_WAIT_2(x) ((x) & 0xff)
76
77 #define LCDC_VCR 0x20
78 #define VCR_V_WIDTH(x) (((x) & 0x3f) << 26)
79 #define VCR_V_WAIT_1(x) (((x) & 0xff) << 8)
80 #define VCR_V_WAIT_2(x) ((x) & 0xff)
81
82 #define LCDC_POS 0x24
83 #define POS_POS(x) ((x) & 1f)
84
85 #define LCDC_LSCR1 0x28
86 /* bit fields in imxfb.h */
87
88 #define LCDC_PWMR 0x2C
89 /* bit fields in imxfb.h */
90
91 #define LCDC_DMACR 0x30
92 /* bit fields in imxfb.h */
93
94 #define LCDC_RMCR 0x34
95 #define RMCR_LCDC_EN (1<<1)
96 #define RMCR_SELF_REF (1<<0)
97
98 #define LCDC_LCDICR 0x38
99 #define LCDICR_INT_SYN (1<<2)
100 #define LCDICR_INT_CON (1)
101
102 #define LCDC_LCDISR 0x40
103 #define LCDISR_UDR_ERR (1<<3)
104 #define LCDISR_ERR_RES (1<<2)
105 #define LCDISR_EOF (1<<1)
106 #define LCDISR_BOF (1<<0)
107
108 /*
109 * These are the bitfields for each
110 * display depth that we support.
111 */
112 struct imxfb_rgb {
113 struct fb_bitfield red;
114 struct fb_bitfield green;
115 struct fb_bitfield blue;
116 struct fb_bitfield transp;
117 };
118
119 struct imxfb_info {
120 struct platform_device *pdev;
121 void __iomem *regs;
122
123 u_int max_bpp;
124 u_int max_xres;
125 u_int max_yres;
126
127 /*
128 * These are the addresses we mapped
129 * the framebuffer memory region to.
130 */
131 dma_addr_t map_dma;
132 u_char *map_cpu;
133 u_int map_size;
134
135 u_char *screen_cpu;
136 dma_addr_t screen_dma;
137 u_int palette_size;
138
139 dma_addr_t dbar1;
140 dma_addr_t dbar2;
141
142 u_int pcr;
143 u_int pwmr;
144 u_int lscr1;
145 u_int dmacr;
146 u_int cmap_inverse:1,
147 cmap_static:1,
148 unused:30;
149
150 void (*lcd_power)(int);
151 void (*backlight_power)(int);
152 };
153
154 #define IMX_NAME "IMX"
155
156 /*
157 * Minimum X and Y resolutions
158 */
159 #define MIN_XRES 64
160 #define MIN_YRES 64
161
162 static struct imxfb_rgb def_rgb_16_tft = {
163 .red = {.offset = 11, .length = 5,},
164 .green = {.offset = 5, .length = 6,},
165 .blue = {.offset = 0, .length = 5,},
166 .transp = {.offset = 0, .length = 0,},
167 };
168
169 static struct imxfb_rgb def_rgb_16_stn = {
170 .red = {.offset = 8, .length = 4,},
171 .green = {.offset = 4, .length = 4,},
172 .blue = {.offset = 0, .length = 4,},
173 .transp = {.offset = 0, .length = 0,},
174 };
175
176 static struct imxfb_rgb def_rgb_8 = {
177 .red = {.offset = 0, .length = 8,},
178 .green = {.offset = 0, .length = 8,},
179 .blue = {.offset = 0, .length = 8,},
180 .transp = {.offset = 0, .length = 0,},
181 };
182
183 static int imxfb_activate_var(struct fb_var_screeninfo *var,
184 struct fb_info *info);
185
186 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
187 {
188 chan &= 0xffff;
189 chan >>= 16 - bf->length;
190 return chan << bf->offset;
191 }
192
193 static int imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
194 u_int trans, struct fb_info *info)
195 {
196 struct imxfb_info *fbi = info->par;
197 u_int val, ret = 1;
198
199 #define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
200 if (regno < fbi->palette_size) {
201 val = (CNVT_TOHW(red, 4) << 8) |
202 (CNVT_TOHW(green,4) << 4) |
203 CNVT_TOHW(blue, 4);
204
205 writel(val, fbi->regs + 0x800 + (regno << 2));
206 ret = 0;
207 }
208 return ret;
209 }
210
211 static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
212 u_int trans, struct fb_info *info)
213 {
214 struct imxfb_info *fbi = info->par;
215 unsigned int val;
216 int ret = 1;
217
218 /*
219 * If inverse mode was selected, invert all the colours
220 * rather than the register number. The register number
221 * is what you poke into the framebuffer to produce the
222 * colour you requested.
223 */
224 if (fbi->cmap_inverse) {
225 red = 0xffff - red;
226 green = 0xffff - green;
227 blue = 0xffff - blue;
228 }
229
230 /*
231 * If greyscale is true, then we convert the RGB value
232 * to greyscale no mater what visual we are using.
233 */
234 if (info->var.grayscale)
235 red = green = blue = (19595 * red + 38470 * green +
236 7471 * blue) >> 16;
237
238 switch (info->fix.visual) {
239 case FB_VISUAL_TRUECOLOR:
240 /*
241 * 12 or 16-bit True Colour. We encode the RGB value
242 * according to the RGB bitfield information.
243 */
244 if (regno < 16) {
245 u32 *pal = info->pseudo_palette;
246
247 val = chan_to_field(red, &info->var.red);
248 val |= chan_to_field(green, &info->var.green);
249 val |= chan_to_field(blue, &info->var.blue);
250
251 pal[regno] = val;
252 ret = 0;
253 }
254 break;
255
256 case FB_VISUAL_STATIC_PSEUDOCOLOR:
257 case FB_VISUAL_PSEUDOCOLOR:
258 ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
259 break;
260 }
261
262 return ret;
263 }
264
265 /*
266 * imxfb_check_var():
267 * Round up in the following order: bits_per_pixel, xres,
268 * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
269 * bitfields, horizontal timing, vertical timing.
270 */
271 static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
272 {
273 struct imxfb_info *fbi = info->par;
274 struct imxfb_rgb *rgb;
275
276 if (var->xres < MIN_XRES)
277 var->xres = MIN_XRES;
278 if (var->yres < MIN_YRES)
279 var->yres = MIN_YRES;
280 if (var->xres > fbi->max_xres)
281 var->xres = fbi->max_xres;
282 if (var->yres > fbi->max_yres)
283 var->yres = fbi->max_yres;
284 var->xres_virtual = max(var->xres_virtual, var->xres);
285 var->yres_virtual = max(var->yres_virtual, var->yres);
286
287 pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
288 switch (var->bits_per_pixel) {
289 case 16:
290 default:
291 if (readl(fbi->regs + LCDC_PCR) & PCR_TFT)
292 rgb = &def_rgb_16_tft;
293 else
294 rgb = &def_rgb_16_stn;
295 break;
296 case 8:
297 rgb = &def_rgb_8;
298 break;
299 }
300
301 /*
302 * Copy the RGB parameters for this display
303 * from the machine specific parameters.
304 */
305 var->red = rgb->red;
306 var->green = rgb->green;
307 var->blue = rgb->blue;
308 var->transp = rgb->transp;
309
310 pr_debug("RGBT length = %d:%d:%d:%d\n",
311 var->red.length, var->green.length, var->blue.length,
312 var->transp.length);
313
314 pr_debug("RGBT offset = %d:%d:%d:%d\n",
315 var->red.offset, var->green.offset, var->blue.offset,
316 var->transp.offset);
317
318 return 0;
319 }
320
321 /*
322 * imxfb_set_par():
323 * Set the user defined part of the display for the specified console
324 */
325 static int imxfb_set_par(struct fb_info *info)
326 {
327 struct imxfb_info *fbi = info->par;
328 struct fb_var_screeninfo *var = &info->var;
329
330 pr_debug("set_par\n");
331
332 if (var->bits_per_pixel == 16)
333 info->fix.visual = FB_VISUAL_TRUECOLOR;
334 else if (!fbi->cmap_static)
335 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
336 else {
337 /*
338 * Some people have weird ideas about wanting static
339 * pseudocolor maps. I suspect their user space
340 * applications are broken.
341 */
342 info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
343 }
344
345 info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
346 fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
347
348 imxfb_activate_var(var, info);
349
350 return 0;
351 }
352
353 static void imxfb_enable_controller(struct imxfb_info *fbi)
354 {
355 pr_debug("Enabling LCD controller\n");
356
357 /* initialize LCDC */
358 writel(readl(fbi->regs + LCDC_RMCR) & ~RMCR_LCDC_EN,
359 fbi->regs + LCDC_RMCR); /* just to be safe... */
360
361 writel(fbi->screen_dma, fbi->regs + LCDC_SSA);
362
363 /* physical screen start address */
364 writel(VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4),
365 fbi->regs + LCDC_VPW);
366
367 /* panning offset 0 (0 pixel offset) */
368 writel(0x00000000, fbi->regs + LCDC_POS);
369
370 /* disable hardware cursor */
371 writel(readl(fbi->regs + LCDC_CPOS) & ~(CPOS_CC0 | CPOS_CC1),
372 fbi->regs + LCDC_CPOS);
373
374 writel(RMCR_LCDC_EN, fbi->regs + LCDC_RMCR);
375
376 if (fbi->backlight_power)
377 fbi->backlight_power(1);
378 if (fbi->lcd_power)
379 fbi->lcd_power(1);
380 }
381
382 static void imxfb_disable_controller(struct imxfb_info *fbi)
383 {
384 pr_debug("Disabling LCD controller\n");
385
386 if (fbi->backlight_power)
387 fbi->backlight_power(0);
388 if (fbi->lcd_power)
389 fbi->lcd_power(0);
390
391 writel(0, fbi->regs + LCDC_RMCR);
392 }
393
394 static int imxfb_blank(int blank, struct fb_info *info)
395 {
396 struct imxfb_info *fbi = info->par;
397
398 pr_debug("imxfb_blank: blank=%d\n", blank);
399
400 switch (blank) {
401 case FB_BLANK_POWERDOWN:
402 case FB_BLANK_VSYNC_SUSPEND:
403 case FB_BLANK_HSYNC_SUSPEND:
404 case FB_BLANK_NORMAL:
405 imxfb_disable_controller(fbi);
406 break;
407
408 case FB_BLANK_UNBLANK:
409 imxfb_enable_controller(fbi);
410 break;
411 }
412 return 0;
413 }
414
415 static struct fb_ops imxfb_ops = {
416 .owner = THIS_MODULE,
417 .fb_check_var = imxfb_check_var,
418 .fb_set_par = imxfb_set_par,
419 .fb_setcolreg = imxfb_setcolreg,
420 .fb_fillrect = cfb_fillrect,
421 .fb_copyarea = cfb_copyarea,
422 .fb_imageblit = cfb_imageblit,
423 .fb_blank = imxfb_blank,
424 };
425
426 /*
427 * imxfb_activate_var():
428 * Configures LCD Controller based on entries in var parameter. Settings are
429 * only written to the controller if changes were made.
430 */
431 static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
432 {
433 struct imxfb_info *fbi = info->par;
434 pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
435 var->xres, var->hsync_len,
436 var->left_margin, var->right_margin);
437 pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
438 var->yres, var->vsync_len,
439 var->upper_margin, var->lower_margin);
440
441 #if DEBUG_VAR
442 if (var->xres < 16 || var->xres > 1024)
443 printk(KERN_ERR "%s: invalid xres %d\n",
444 info->fix.id, var->xres);
445 if (var->hsync_len < 1 || var->hsync_len > 64)
446 printk(KERN_ERR "%s: invalid hsync_len %d\n",
447 info->fix.id, var->hsync_len);
448 if (var->left_margin > 255)
449 printk(KERN_ERR "%s: invalid left_margin %d\n",
450 info->fix.id, var->left_margin);
451 if (var->right_margin > 255)
452 printk(KERN_ERR "%s: invalid right_margin %d\n",
453 info->fix.id, var->right_margin);
454 if (var->yres < 1 || var->yres > 511)
455 printk(KERN_ERR "%s: invalid yres %d\n",
456 info->fix.id, var->yres);
457 if (var->vsync_len > 100)
458 printk(KERN_ERR "%s: invalid vsync_len %d\n",
459 info->fix.id, var->vsync_len);
460 if (var->upper_margin > 63)
461 printk(KERN_ERR "%s: invalid upper_margin %d\n",
462 info->fix.id, var->upper_margin);
463 if (var->lower_margin > 255)
464 printk(KERN_ERR "%s: invalid lower_margin %d\n",
465 info->fix.id, var->lower_margin);
466 #endif
467
468 writel(HCR_H_WIDTH(var->hsync_len) |
469 HCR_H_WAIT_1(var->right_margin) |
470 HCR_H_WAIT_2(var->left_margin),
471 fbi->regs + LCDC_HCR);
472
473 writel(VCR_V_WIDTH(var->vsync_len) |
474 VCR_V_WAIT_1(var->lower_margin) |
475 VCR_V_WAIT_2(var->upper_margin),
476 fbi->regs + LCDC_VCR);
477
478 writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres),
479 fbi->regs + LCDC_SIZE);
480 writel(fbi->pcr, fbi->regs + LCDC_PCR);
481 writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
482 writel(fbi->lscr1, fbi->regs + LCDC_LSCR1);
483 writel(fbi->dmacr, fbi->regs + LCDC_DMACR);
484
485 return 0;
486 }
487
488 #ifdef CONFIG_PM
489 /*
490 * Power management hooks. Note that we won't be called from IRQ context,
491 * unlike the blank functions above, so we may sleep.
492 */
493 static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
494 {
495 struct imxfb_info *fbi = platform_get_drvdata(dev);
496
497 pr_debug("%s\n", __func__);
498
499 imxfb_disable_controller(fbi);
500 return 0;
501 }
502
503 static int imxfb_resume(struct platform_device *dev)
504 {
505 struct imxfb_info *fbi = platform_get_drvdata(dev);
506
507 pr_debug("%s\n", __func__);
508
509 imxfb_enable_controller(fbi);
510 return 0;
511 }
512 #else
513 #define imxfb_suspend NULL
514 #define imxfb_resume NULL
515 #endif
516
517 static int __init imxfb_init_fbinfo(struct platform_device *pdev)
518 {
519 struct imx_fb_platform_data *pdata = pdev->dev.platform_data;
520 struct fb_info *info = dev_get_drvdata(&pdev->dev);
521 struct imxfb_info *fbi = info->par;
522
523 pr_debug("%s\n",__func__);
524
525 info->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
526 if (!info->pseudo_palette)
527 return -ENOMEM;
528
529 memset(fbi, 0, sizeof(struct imxfb_info));
530
531 strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
532
533 info->fix.type = FB_TYPE_PACKED_PIXELS;
534 info->fix.type_aux = 0;
535 info->fix.xpanstep = 0;
536 info->fix.ypanstep = 0;
537 info->fix.ywrapstep = 0;
538 info->fix.accel = FB_ACCEL_NONE;
539
540 info->var.nonstd = 0;
541 info->var.activate = FB_ACTIVATE_NOW;
542 info->var.height = -1;
543 info->var.width = -1;
544 info->var.accel_flags = 0;
545 info->var.vmode = FB_VMODE_NONINTERLACED;
546
547 info->fbops = &imxfb_ops;
548 info->flags = FBINFO_FLAG_DEFAULT |
549 FBINFO_READS_FAST;
550
551 fbi->max_xres = pdata->xres;
552 info->var.xres = pdata->xres;
553 info->var.xres_virtual = pdata->xres;
554 fbi->max_yres = pdata->yres;
555 info->var.yres = pdata->yres;
556 info->var.yres_virtual = pdata->yres;
557 fbi->max_bpp = pdata->bpp;
558 info->var.bits_per_pixel = pdata->bpp;
559 info->var.nonstd = pdata->nonstd;
560 info->var.pixclock = pdata->pixclock;
561 info->var.hsync_len = pdata->hsync_len;
562 info->var.left_margin = pdata->left_margin;
563 info->var.right_margin = pdata->right_margin;
564 info->var.vsync_len = pdata->vsync_len;
565 info->var.upper_margin = pdata->upper_margin;
566 info->var.lower_margin = pdata->lower_margin;
567 info->var.sync = pdata->sync;
568 info->var.grayscale = pdata->cmap_greyscale;
569 fbi->cmap_inverse = pdata->cmap_inverse;
570 fbi->cmap_static = pdata->cmap_static;
571 fbi->pcr = pdata->pcr;
572 fbi->lscr1 = pdata->lscr1;
573 fbi->dmacr = pdata->dmacr;
574 fbi->pwmr = pdata->pwmr;
575 fbi->lcd_power = pdata->lcd_power;
576 fbi->backlight_power = pdata->backlight_power;
577 info->fix.smem_len = fbi->max_xres * fbi->max_yres *
578 fbi->max_bpp / 8;
579
580 return 0;
581 }
582
583 static int __init imxfb_probe(struct platform_device *pdev)
584 {
585 struct imxfb_info *fbi;
586 struct fb_info *info;
587 struct imx_fb_platform_data *pdata;
588 struct resource *res;
589 int ret;
590
591 printk("i.MX Framebuffer driver\n");
592
593 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
594 if (!res)
595 return -ENODEV;
596
597 pdata = pdev->dev.platform_data;
598 if (!pdata) {
599 dev_err(&pdev->dev,"No platform_data available\n");
600 return -ENOMEM;
601 }
602
603 info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
604 if (!info)
605 return -ENOMEM;
606
607 fbi = info->par;
608
609 platform_set_drvdata(pdev, info);
610
611 ret = imxfb_init_fbinfo(pdev);
612 if (ret < 0)
613 goto failed_init;
614
615 res = request_mem_region(res->start, resource_size(res),
616 DRIVER_NAME);
617 if (!res) {
618 ret = -EBUSY;
619 goto failed_req;
620 }
621
622 fbi->regs = ioremap(res->start, resource_size(res));
623 if (fbi->regs == NULL) {
624 printk(KERN_ERR"Cannot map frame buffer registers\n");
625 goto failed_ioremap;
626 }
627
628 if (!pdata->fixed_screen_cpu) {
629 fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
630 fbi->map_cpu = dma_alloc_writecombine(&pdev->dev,
631 fbi->map_size, &fbi->map_dma, GFP_KERNEL);
632
633 if (!fbi->map_cpu) {
634 dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
635 ret = -ENOMEM;
636 goto failed_map;
637 }
638
639 info->screen_base = fbi->map_cpu;
640 fbi->screen_cpu = fbi->map_cpu;
641 fbi->screen_dma = fbi->map_dma;
642 info->fix.smem_start = fbi->screen_dma;
643 } else {
644 /* Fixed framebuffer mapping enables location of the screen in eSRAM */
645 fbi->map_cpu = pdata->fixed_screen_cpu;
646 fbi->map_dma = pdata->fixed_screen_dma;
647 info->screen_base = fbi->map_cpu;
648 fbi->screen_cpu = fbi->map_cpu;
649 fbi->screen_dma = fbi->map_dma;
650 info->fix.smem_start = fbi->screen_dma;
651 }
652
653 /*
654 * This makes sure that our colour bitfield
655 * descriptors are correctly initialised.
656 */
657 imxfb_check_var(&info->var, info);
658
659 ret = fb_alloc_cmap(&info->cmap, 1 << info->var.bits_per_pixel, 0);
660 if (ret < 0)
661 goto failed_cmap;
662
663 imxfb_set_par(info);
664 ret = register_framebuffer(info);
665 if (ret < 0) {
666 dev_err(&pdev->dev, "failed to register framebuffer\n");
667 goto failed_register;
668 }
669
670 imxfb_enable_controller(fbi);
671
672 return 0;
673
674 failed_register:
675 fb_dealloc_cmap(&info->cmap);
676 failed_cmap:
677 if (!pdata->fixed_screen_cpu)
678 dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
679 fbi->map_dma);
680 failed_map:
681 iounmap(fbi->regs);
682 failed_ioremap:
683 release_mem_region(res->start, res->end - res->start);
684 failed_req:
685 kfree(info->pseudo_palette);
686 failed_init:
687 platform_set_drvdata(pdev, NULL);
688 framebuffer_release(info);
689 return ret;
690 }
691
692 static int __devexit imxfb_remove(struct platform_device *pdev)
693 {
694 struct fb_info *info = platform_get_drvdata(pdev);
695 struct imxfb_info *fbi = info->par;
696 struct resource *res;
697
698 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
699
700 imxfb_disable_controller(fbi);
701
702 unregister_framebuffer(info);
703
704 fb_dealloc_cmap(&info->cmap);
705 kfree(info->pseudo_palette);
706 framebuffer_release(info);
707
708 iounmap(fbi->regs);
709 release_mem_region(res->start, res->end - res->start + 1);
710 platform_set_drvdata(pdev, NULL);
711
712 return 0;
713 }
714
715 void imxfb_shutdown(struct platform_device * dev)
716 {
717 struct fb_info *info = platform_get_drvdata(dev);
718 struct imxfb_info *fbi = info->par;
719 imxfb_disable_controller(fbi);
720 }
721
722 static struct platform_driver imxfb_driver = {
723 .suspend = imxfb_suspend,
724 .resume = imxfb_resume,
725 .remove = __devexit_p(imxfb_remove),
726 .shutdown = imxfb_shutdown,
727 .driver = {
728 .name = DRIVER_NAME,
729 },
730 };
731
732 int __init imxfb_init(void)
733 {
734 return platform_driver_probe(&imxfb_driver, imxfb_probe);
735 }
736
737 static void __exit imxfb_cleanup(void)
738 {
739 platform_driver_unregister(&imxfb_driver);
740 }
741
742 module_init(imxfb_init);
743 module_exit(imxfb_cleanup);
744
745 MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
746 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
747 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)