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tracing: Change tracing_stats_fops to rely on tracing_get_cpu()
[linux-2.6.git] / drivers / video / ep93xx-fb.c
blob28a837dfddd1cde2974ced029ebd4900de6204b3
1 /*
2 * linux/drivers/video/ep93xx-fb.c
3 *
4 * Framebuffer support for the EP93xx series.
5 *
6 * Copyright (C) 2007 Bluewater Systems Ltd
7 * Author: Ryan Mallon
8 *
9 * Copyright (c) 2009 H Hartley Sweeten <hsweeten@visionengravers.com>
10 *
11 * Based on the Cirrus Logic ep93xxfb driver, and various other ep93xxfb
12 * drivers.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 */
19
20 #include <linux/platform_device.h>
21 #include <linux/module.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/slab.h>
24 #include <linux/clk.h>
25 #include <linux/fb.h>
26 #include <linux/io.h>
27
28 #include <linux/platform_data/video-ep93xx.h>
29
30 /* Vertical Frame Timing Registers */
31 #define EP93XXFB_VLINES_TOTAL 0x0000 /* SW locked */
32 #define EP93XXFB_VSYNC 0x0004 /* SW locked */
33 #define EP93XXFB_VACTIVE 0x0008 /* SW locked */
34 #define EP93XXFB_VBLANK 0x0228 /* SW locked */
35 #define EP93XXFB_VCLK 0x000c /* SW locked */
36
37 /* Horizontal Frame Timing Registers */
38 #define EP93XXFB_HCLKS_TOTAL 0x0010 /* SW locked */
39 #define EP93XXFB_HSYNC 0x0014 /* SW locked */
40 #define EP93XXFB_HACTIVE 0x0018 /* SW locked */
41 #define EP93XXFB_HBLANK 0x022c /* SW locked */
42 #define EP93XXFB_HCLK 0x001c /* SW locked */
43
44 /* Frame Buffer Memory Configuration Registers */
45 #define EP93XXFB_SCREEN_PAGE 0x0028
46 #define EP93XXFB_SCREEN_HPAGE 0x002c
47 #define EP93XXFB_SCREEN_LINES 0x0030
48 #define EP93XXFB_LINE_LENGTH 0x0034
49 #define EP93XXFB_VLINE_STEP 0x0038
50 #define EP93XXFB_LINE_CARRY 0x003c /* SW locked */
51 #define EP93XXFB_EOL_OFFSET 0x0230
52
53 /* Other Video Registers */
54 #define EP93XXFB_BRIGHTNESS 0x0020
55 #define EP93XXFB_ATTRIBS 0x0024 /* SW locked */
56 #define EP93XXFB_SWLOCK 0x007c /* SW locked */
57 #define EP93XXFB_AC_RATE 0x0214
58 #define EP93XXFB_FIFO_LEVEL 0x0234
59 #define EP93XXFB_PIXELMODE 0x0054
60 #define EP93XXFB_PIXELMODE_32BPP (0x7 << 0)
61 #define EP93XXFB_PIXELMODE_24BPP (0x6 << 0)
62 #define EP93XXFB_PIXELMODE_16BPP (0x4 << 0)
63 #define EP93XXFB_PIXELMODE_8BPP (0x2 << 0)
64 #define EP93XXFB_PIXELMODE_SHIFT_1P_24B (0x0 << 3)
65 #define EP93XXFB_PIXELMODE_SHIFT_1P_18B (0x1 << 3)
66 #define EP93XXFB_PIXELMODE_COLOR_LUT (0x0 << 10)
67 #define EP93XXFB_PIXELMODE_COLOR_888 (0x4 << 10)
68 #define EP93XXFB_PIXELMODE_COLOR_555 (0x5 << 10)
69 #define EP93XXFB_PARL_IF_OUT 0x0058
70 #define EP93XXFB_PARL_IF_IN 0x005c
71
72 /* Blink Control Registers */
73 #define EP93XXFB_BLINK_RATE 0x0040
74 #define EP93XXFB_BLINK_MASK 0x0044
75 #define EP93XXFB_BLINK_PATTRN 0x0048
76 #define EP93XXFB_PATTRN_MASK 0x004c
77 #define EP93XXFB_BKGRND_OFFSET 0x0050
78
79 /* Hardware Cursor Registers */
80 #define EP93XXFB_CURSOR_ADR_START 0x0060
81 #define EP93XXFB_CURSOR_ADR_RESET 0x0064
82 #define EP93XXFB_CURSOR_SIZE 0x0068
83 #define EP93XXFB_CURSOR_COLOR1 0x006c
84 #define EP93XXFB_CURSOR_COLOR2 0x0070
85 #define EP93XXFB_CURSOR_BLINK_COLOR1 0x021c
86 #define EP93XXFB_CURSOR_BLINK_COLOR2 0x0220
87 #define EP93XXFB_CURSOR_XY_LOC 0x0074
88 #define EP93XXFB_CURSOR_DSCAN_HY_LOC 0x0078
89 #define EP93XXFB_CURSOR_BLINK_RATE_CTRL 0x0224
90
91 /* LUT Registers */
92 #define EP93XXFB_GRY_SCL_LUTR 0x0080
93 #define EP93XXFB_GRY_SCL_LUTG 0x0280
94 #define EP93XXFB_GRY_SCL_LUTB 0x0300
95 #define EP93XXFB_LUT_SW_CONTROL 0x0218
96 #define EP93XXFB_LUT_SW_CONTROL_SWTCH (1 << 0)
97 #define EP93XXFB_LUT_SW_CONTROL_SSTAT (1 << 1)
98 #define EP93XXFB_COLOR_LUT 0x0400
99
100 /* Video Signature Registers */
101 #define EP93XXFB_VID_SIG_RSLT_VAL 0x0200
102 #define EP93XXFB_VID_SIG_CTRL 0x0204
103 #define EP93XXFB_VSIG 0x0208
104 #define EP93XXFB_HSIG 0x020c
105 #define EP93XXFB_SIG_CLR_STR 0x0210
106
107 /* Minimum / Maximum resolutions supported */
108 #define EP93XXFB_MIN_XRES 64
109 #define EP93XXFB_MIN_YRES 64
110 #define EP93XXFB_MAX_XRES 1024
111 #define EP93XXFB_MAX_YRES 768
112
113 struct ep93xx_fbi {
114 struct ep93xxfb_mach_info *mach_info;
115 struct clk *clk;
116 struct resource *res;
117 void __iomem *mmio_base;
118 unsigned int pseudo_palette[256];
119 };
120
121 static int check_screenpage_bug = 1;
122 module_param(check_screenpage_bug, int, 0644);
123 MODULE_PARM_DESC(check_screenpage_bug,
124 "Check for bit 27 screen page bug. Default = 1");
125
126 static inline unsigned int ep93xxfb_readl(struct ep93xx_fbi *fbi,
127 unsigned int off)
128 {
129 return __raw_readl(fbi->mmio_base + off);
130 }
131
132 static inline void ep93xxfb_writel(struct ep93xx_fbi *fbi,
133 unsigned int val, unsigned int off)
134 {
135 __raw_writel(val, fbi->mmio_base + off);
136 }
137
138 /*
139 * Write to one of the locked raster registers.
140 */
141 static inline void ep93xxfb_out_locked(struct ep93xx_fbi *fbi,
142 unsigned int val, unsigned int reg)
143 {
144 /*
145 * We don't need a lock or delay here since the raster register
146 * block will remain unlocked until the next access.
147 */
148 ep93xxfb_writel(fbi, 0xaa, EP93XXFB_SWLOCK);
149 ep93xxfb_writel(fbi, val, reg);
150 }
151
152 static void ep93xxfb_set_video_attribs(struct fb_info *info)
153 {
154 struct ep93xx_fbi *fbi = info->par;
155 unsigned int attribs;
156
157 attribs = EP93XXFB_ENABLE;
158 attribs |= fbi->mach_info->flags;
159 ep93xxfb_out_locked(fbi, attribs, EP93XXFB_ATTRIBS);
160 }
161
162 static int ep93xxfb_set_pixelmode(struct fb_info *info)
163 {
164 struct ep93xx_fbi *fbi = info->par;
165 unsigned int val;
166
167 info->var.transp.offset = 0;
168 info->var.transp.length = 0;
169
170 switch (info->var.bits_per_pixel) {
171 case 8:
172 val = EP93XXFB_PIXELMODE_8BPP | EP93XXFB_PIXELMODE_COLOR_LUT |
173 EP93XXFB_PIXELMODE_SHIFT_1P_18B;
174
175 info->var.red.offset = 0;
176 info->var.red.length = 8;
177 info->var.green.offset = 0;
178 info->var.green.length = 8;
179 info->var.blue.offset = 0;
180 info->var.blue.length = 8;
181 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
182 break;
183
184 case 16:
185 val = EP93XXFB_PIXELMODE_16BPP | EP93XXFB_PIXELMODE_COLOR_555 |
186 EP93XXFB_PIXELMODE_SHIFT_1P_18B;
187
188 info->var.red.offset = 11;
189 info->var.red.length = 5;
190 info->var.green.offset = 5;
191 info->var.green.length = 6;
192 info->var.blue.offset = 0;
193 info->var.blue.length = 5;
194 info->fix.visual = FB_VISUAL_TRUECOLOR;
195 break;
196
197 case 24:
198 val = EP93XXFB_PIXELMODE_24BPP | EP93XXFB_PIXELMODE_COLOR_888 |
199 EP93XXFB_PIXELMODE_SHIFT_1P_24B;
200
201 info->var.red.offset = 16;
202 info->var.red.length = 8;
203 info->var.green.offset = 8;
204 info->var.green.length = 8;
205 info->var.blue.offset = 0;
206 info->var.blue.length = 8;
207 info->fix.visual = FB_VISUAL_TRUECOLOR;
208 break;
209
210 case 32:
211 val = EP93XXFB_PIXELMODE_32BPP | EP93XXFB_PIXELMODE_COLOR_888 |
212 EP93XXFB_PIXELMODE_SHIFT_1P_24B;
213
214 info->var.red.offset = 16;
215 info->var.red.length = 8;
216 info->var.green.offset = 8;
217 info->var.green.length = 8;
218 info->var.blue.offset = 0;
219 info->var.blue.length = 8;
220 info->fix.visual = FB_VISUAL_TRUECOLOR;
221 break;
222
223 default:
224 return -EINVAL;
225 }
226
227 ep93xxfb_writel(fbi, val, EP93XXFB_PIXELMODE);
228 return 0;
229 }
230
231 static void ep93xxfb_set_timing(struct fb_info *info)
232 {
233 struct ep93xx_fbi *fbi = info->par;
234 unsigned int vlines_total, hclks_total, start, stop;
235
236 vlines_total = info->var.yres + info->var.upper_margin +
237 info->var.lower_margin + info->var.vsync_len - 1;
238
239 hclks_total = info->var.xres + info->var.left_margin +
240 info->var.right_margin + info->var.hsync_len - 1;
241
242 ep93xxfb_out_locked(fbi, vlines_total, EP93XXFB_VLINES_TOTAL);
243 ep93xxfb_out_locked(fbi, hclks_total, EP93XXFB_HCLKS_TOTAL);
244
245 start = vlines_total;
246 stop = vlines_total - info->var.vsync_len;
247 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VSYNC);
248
249 start = vlines_total - info->var.vsync_len - info->var.upper_margin;
250 stop = info->var.lower_margin - 1;
251 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VBLANK);
252 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VACTIVE);
253
254 start = vlines_total;
255 stop = vlines_total + 1;
256 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VCLK);
257
258 start = hclks_total;
259 stop = hclks_total - info->var.hsync_len;
260 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HSYNC);
261
262 start = hclks_total - info->var.hsync_len - info->var.left_margin;
263 stop = info->var.right_margin - 1;
264 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HBLANK);
265 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HACTIVE);
266
267 start = hclks_total;
268 stop = hclks_total;
269 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HCLK);
270
271 ep93xxfb_out_locked(fbi, 0x0, EP93XXFB_LINE_CARRY);
272 }
273
274 static int ep93xxfb_set_par(struct fb_info *info)
275 {
276 struct ep93xx_fbi *fbi = info->par;
277
278 clk_set_rate(fbi->clk, 1000 * PICOS2KHZ(info->var.pixclock));
279
280 ep93xxfb_set_timing(info);
281
282 info->fix.line_length = info->var.xres_virtual *
283 info->var.bits_per_pixel / 8;
284
285 ep93xxfb_writel(fbi, info->fix.smem_start, EP93XXFB_SCREEN_PAGE);
286 ep93xxfb_writel(fbi, info->var.yres - 1, EP93XXFB_SCREEN_LINES);
287 ep93xxfb_writel(fbi, ((info->var.xres * info->var.bits_per_pixel)
288 / 32) - 1, EP93XXFB_LINE_LENGTH);
289 ep93xxfb_writel(fbi, info->fix.line_length / 4, EP93XXFB_VLINE_STEP);
290 ep93xxfb_set_video_attribs(info);
291 return 0;
292 }
293
294 static int ep93xxfb_check_var(struct fb_var_screeninfo *var,
295 struct fb_info *info)
296 {
297 int err;
298
299 err = ep93xxfb_set_pixelmode(info);
300 if (err)
301 return err;
302
303 var->xres = max_t(unsigned int, var->xres, EP93XXFB_MIN_XRES);
304 var->xres = min_t(unsigned int, var->xres, EP93XXFB_MAX_XRES);
305 var->xres_virtual = max(var->xres_virtual, var->xres);
306
307 var->yres = max_t(unsigned int, var->yres, EP93XXFB_MIN_YRES);
308 var->yres = min_t(unsigned int, var->yres, EP93XXFB_MAX_YRES);
309 var->yres_virtual = max(var->yres_virtual, var->yres);
310
311 return 0;
312 }
313
314 static int ep93xxfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
315 {
316 unsigned int offset = vma->vm_pgoff << PAGE_SHIFT;
317
318 if (offset < info->fix.smem_len) {
319 return dma_mmap_writecombine(info->dev, vma, info->screen_base,
320 info->fix.smem_start,
321 info->fix.smem_len);
322 }
323
324 return -EINVAL;
325 }
326
327 static int ep93xxfb_blank(int blank_mode, struct fb_info *info)
328 {
329 struct ep93xx_fbi *fbi = info->par;
330 unsigned int attribs = ep93xxfb_readl(fbi, EP93XXFB_ATTRIBS);
331
332 if (blank_mode) {
333 if (fbi->mach_info->blank)
334 fbi->mach_info->blank(blank_mode, info);
335 ep93xxfb_out_locked(fbi, attribs & ~EP93XXFB_ENABLE,
336 EP93XXFB_ATTRIBS);
337 clk_disable(fbi->clk);
338 } else {
339 clk_enable(fbi->clk);
340 ep93xxfb_out_locked(fbi, attribs | EP93XXFB_ENABLE,
341 EP93XXFB_ATTRIBS);
342 if (fbi->mach_info->blank)
343 fbi->mach_info->blank(blank_mode, info);
344 }
345
346 return 0;
347 }
348
349 static inline int ep93xxfb_convert_color(int val, int width)
350 {
351 return ((val << width) + 0x7fff - val) >> 16;
352 }
353
354 static int ep93xxfb_setcolreg(unsigned int regno, unsigned int red,
355 unsigned int green, unsigned int blue,
356 unsigned int transp, struct fb_info *info)
357 {
358 struct ep93xx_fbi *fbi = info->par;
359 unsigned int *pal = info->pseudo_palette;
360 unsigned int ctrl, i, rgb, lut_current, lut_stat;
361
362 switch (info->fix.visual) {
363 case FB_VISUAL_PSEUDOCOLOR:
364 if (regno > 255)
365 return 1;
366 rgb = ((red & 0xff00) << 8) | (green & 0xff00) |
367 ((blue & 0xff00) >> 8);
368
369 pal[regno] = rgb;
370 ep93xxfb_writel(fbi, rgb, (EP93XXFB_COLOR_LUT + (regno << 2)));
371 ctrl = ep93xxfb_readl(fbi, EP93XXFB_LUT_SW_CONTROL);
372 lut_stat = !!(ctrl & EP93XXFB_LUT_SW_CONTROL_SSTAT);
373 lut_current = !!(ctrl & EP93XXFB_LUT_SW_CONTROL_SWTCH);
374
375 if (lut_stat == lut_current) {
376 for (i = 0; i < 256; i++) {
377 ep93xxfb_writel(fbi, pal[i],
378 EP93XXFB_COLOR_LUT + (i << 2));
379 }
380
381 ep93xxfb_writel(fbi,
382 ctrl ^ EP93XXFB_LUT_SW_CONTROL_SWTCH,
383 EP93XXFB_LUT_SW_CONTROL);
384 }
385 break;
386
387 case FB_VISUAL_TRUECOLOR:
388 if (regno > 16)
389 return 1;
390
391 red = ep93xxfb_convert_color(red, info->var.red.length);
392 green = ep93xxfb_convert_color(green, info->var.green.length);
393 blue = ep93xxfb_convert_color(blue, info->var.blue.length);
394 transp = ep93xxfb_convert_color(transp,
395 info->var.transp.length);
396
397 pal[regno] = (red << info->var.red.offset) |
398 (green << info->var.green.offset) |
399 (blue << info->var.blue.offset) |
400 (transp << info->var.transp.offset);
401 break;
402
403 default:
404 return 1;
405 }
406
407 return 0;
408 }
409
410 static struct fb_ops ep93xxfb_ops = {
411 .owner = THIS_MODULE,
412 .fb_check_var = ep93xxfb_check_var,
413 .fb_set_par = ep93xxfb_set_par,
414 .fb_blank = ep93xxfb_blank,
415 .fb_fillrect = cfb_fillrect,
416 .fb_copyarea = cfb_copyarea,
417 .fb_imageblit = cfb_imageblit,
418 .fb_setcolreg = ep93xxfb_setcolreg,
419 .fb_mmap = ep93xxfb_mmap,
420 };
421
422 static int ep93xxfb_calc_fbsize(struct ep93xxfb_mach_info *mach_info)
423 {
424 int i, fb_size = 0;
425
426 if (mach_info->num_modes == EP93XXFB_USE_MODEDB) {
427 fb_size = EP93XXFB_MAX_XRES * EP93XXFB_MAX_YRES *
428 mach_info->bpp / 8;
429 } else {
430 for (i = 0; i < mach_info->num_modes; i++) {
431 const struct fb_videomode *mode;
432 int size;
433
434 mode = &mach_info->modes[i];
435 size = mode->xres * mode->yres * mach_info->bpp / 8;
436 if (size > fb_size)
437 fb_size = size;
438 }
439 }
440
441 return fb_size;
442 }
443
444 static int ep93xxfb_alloc_videomem(struct fb_info *info)
445 {
446 struct ep93xx_fbi *fbi = info->par;
447 char __iomem *virt_addr;
448 dma_addr_t phys_addr;
449 unsigned int fb_size;
450
451 fb_size = ep93xxfb_calc_fbsize(fbi->mach_info);
452 virt_addr = dma_alloc_writecombine(info->dev, fb_size,
453 &phys_addr, GFP_KERNEL);
454 if (!virt_addr)
455 return -ENOMEM;
456
457 /*
458 * There is a bug in the ep93xx framebuffer which causes problems
459 * if bit 27 of the physical address is set.
460 * See: http://marc.info/?l=linux-arm-kernel&m=110061245502000&w=2
461 * There does not seem to be any official errata for this, but I
462 * have confirmed the problem exists on my hardware (ep9315) at
463 * least.
464 */
465 if (check_screenpage_bug && phys_addr & (1 << 27)) {
466 dev_err(info->dev, "ep93xx framebuffer bug. phys addr (0x%x) "
467 "has bit 27 set: cannot init framebuffer\n",
468 phys_addr);
469
470 dma_free_coherent(info->dev, fb_size, virt_addr, phys_addr);
471 return -ENOMEM;
472 }
473
474 info->fix.smem_start = phys_addr;
475 info->fix.smem_len = fb_size;
476 info->screen_base = virt_addr;
477
478 return 0;
479 }
480
481 static void ep93xxfb_dealloc_videomem(struct fb_info *info)
482 {
483 if (info->screen_base)
484 dma_free_coherent(info->dev, info->fix.smem_len,
485 info->screen_base, info->fix.smem_start);
486 }
487
488 static int ep93xxfb_probe(struct platform_device *pdev)
489 {
490 struct ep93xxfb_mach_info *mach_info = pdev->dev.platform_data;
491 struct fb_info *info;
492 struct ep93xx_fbi *fbi;
493 struct resource *res;
494 char *video_mode;
495 int err;
496
497 if (!mach_info)
498 return -EINVAL;
499
500 info = framebuffer_alloc(sizeof(struct ep93xx_fbi), &pdev->dev);
501 if (!info)
502 return -ENOMEM;
503
504 info->dev = &pdev->dev;
505 platform_set_drvdata(pdev, info);
506 fbi = info->par;
507 fbi->mach_info = mach_info;
508
509 err = fb_alloc_cmap(&info->cmap, 256, 0);
510 if (err)
511 goto failed_cmap;
512
513 err = ep93xxfb_alloc_videomem(info);
514 if (err)
515 goto failed_videomem;
516
517 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
518 if (!res) {
519 err = -ENXIO;
520 goto failed_resource;
521 }
522
523 /*
524 * FIXME - We don't do a request_mem_region here because we are
525 * sharing the register space with the backlight driver (see
526 * drivers/video/backlight/ep93xx_bl.c) and doing so will cause
527 * the second loaded driver to return -EBUSY.
528 *
529 * NOTE: No locking is required; the backlight does not touch
530 * any of the framebuffer registers.
531 */
532 fbi->res = res;
533 fbi->mmio_base = devm_ioremap(&pdev->dev, res->start,
534 resource_size(res));
535 if (!fbi->mmio_base) {
536 err = -ENXIO;
537 goto failed_resource;
538 }
539
540 strcpy(info->fix.id, pdev->name);
541 info->fbops = &ep93xxfb_ops;
542 info->fix.type = FB_TYPE_PACKED_PIXELS;
543 info->fix.accel = FB_ACCEL_NONE;
544 info->var.activate = FB_ACTIVATE_NOW;
545 info->var.vmode = FB_VMODE_NONINTERLACED;
546 info->flags = FBINFO_DEFAULT;
547 info->node = -1;
548 info->state = FBINFO_STATE_RUNNING;
549 info->pseudo_palette = &fbi->pseudo_palette;
550
551 fb_get_options("ep93xx-fb", &video_mode);
552 err = fb_find_mode(&info->var, info, video_mode,
553 fbi->mach_info->modes, fbi->mach_info->num_modes,
554 fbi->mach_info->default_mode, fbi->mach_info->bpp);
555 if (err == 0) {
556 dev_err(info->dev, "No suitable video mode found\n");
557 err = -EINVAL;
558 goto failed_resource;
559 }
560
561 if (mach_info->setup) {
562 err = mach_info->setup(pdev);
563 if (err)
564 goto failed_resource;
565 }
566
567 err = ep93xxfb_check_var(&info->var, info);
568 if (err)
569 goto failed_check;
570
571 fbi->clk = devm_clk_get(&pdev->dev, NULL);
572 if (IS_ERR(fbi->clk)) {
573 err = PTR_ERR(fbi->clk);
574 fbi->clk = NULL;
575 goto failed_check;
576 }
577
578 ep93xxfb_set_par(info);
579 clk_enable(fbi->clk);
580
581 err = register_framebuffer(info);
582 if (err)
583 goto failed_check;
584
585 dev_info(info->dev, "registered. Mode = %dx%d-%d\n",
586 info->var.xres, info->var.yres, info->var.bits_per_pixel);
587 return 0;
588
589 failed_check:
590 if (fbi->mach_info->teardown)
591 fbi->mach_info->teardown(pdev);
592 failed_resource:
593 ep93xxfb_dealloc_videomem(info);
594 failed_videomem:
595 fb_dealloc_cmap(&info->cmap);
596 failed_cmap:
597 kfree(info);
598
599 return err;
600 }
601
602 static int ep93xxfb_remove(struct platform_device *pdev)
603 {
604 struct fb_info *info = platform_get_drvdata(pdev);
605 struct ep93xx_fbi *fbi = info->par;
606
607 unregister_framebuffer(info);
608 clk_disable(fbi->clk);
609 ep93xxfb_dealloc_videomem(info);
610 fb_dealloc_cmap(&info->cmap);
611
612 if (fbi->mach_info->teardown)
613 fbi->mach_info->teardown(pdev);
614
615 kfree(info);
616
617 return 0;
618 }
619
620 static struct platform_driver ep93xxfb_driver = {
621 .probe = ep93xxfb_probe,
622 .remove = ep93xxfb_remove,
623 .driver = {
624 .name = "ep93xx-fb",
625 .owner = THIS_MODULE,
626 },
627 };
628 module_platform_driver(ep93xxfb_driver);
629
630 MODULE_DESCRIPTION("EP93XX Framebuffer Driver");
631 MODULE_ALIAS("platform:ep93xx-fb");
632 MODULE_AUTHOR("Ryan Mallon, "
633 "H Hartley Sweeten <hsweeten@visionengravers.com");
634 MODULE_LICENSE("GPL");
Linus' kernel tree