blob: 755ef3e65caf4c980b8791cdfb2603dc3b576942 [file] [log] [blame]
Ryan Mallon88017bda2009-09-22 16:47:09 -07001/*
2 * linux/drivers/video/ep93xx-fb.c
3 *
4 * Framebuffer support for the EP93xx series.
5 *
6 * Copyright (C) 2007 Bluewater Systems Ltd
Ryan Mallon1c5454e2011-06-15 14:45:36 +10007 * Author: Ryan Mallon
Ryan Mallon88017bda2009-09-22 16:47:09 -07008 *
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>
Paul Gortmaker355b2002011-07-03 16:17:28 -040021#include <linux/module.h>
Ryan Mallon88017bda2009-09-22 16:47:09 -070022#include <linux/dma-mapping.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/slab.h>
Ryan Mallon88017bda2009-09-22 16:47:09 -070024#include <linux/clk.h>
25#include <linux/fb.h>
26
Arnd Bergmanna3b29242012-08-24 15:12:11 +020027#include <linux/platform_data/video-ep93xx.h>
Ryan Mallon88017bda2009-09-22 16:47:09 -070028
29/* Vertical Frame Timing Registers */
30#define EP93XXFB_VLINES_TOTAL 0x0000 /* SW locked */
31#define EP93XXFB_VSYNC 0x0004 /* SW locked */
32#define EP93XXFB_VACTIVE 0x0008 /* SW locked */
33#define EP93XXFB_VBLANK 0x0228 /* SW locked */
34#define EP93XXFB_VCLK 0x000c /* SW locked */
35
36/* Horizontal Frame Timing Registers */
37#define EP93XXFB_HCLKS_TOTAL 0x0010 /* SW locked */
38#define EP93XXFB_HSYNC 0x0014 /* SW locked */
39#define EP93XXFB_HACTIVE 0x0018 /* SW locked */
40#define EP93XXFB_HBLANK 0x022c /* SW locked */
41#define EP93XXFB_HCLK 0x001c /* SW locked */
42
43/* Frame Buffer Memory Configuration Registers */
44#define EP93XXFB_SCREEN_PAGE 0x0028
45#define EP93XXFB_SCREEN_HPAGE 0x002c
46#define EP93XXFB_SCREEN_LINES 0x0030
47#define EP93XXFB_LINE_LENGTH 0x0034
48#define EP93XXFB_VLINE_STEP 0x0038
49#define EP93XXFB_LINE_CARRY 0x003c /* SW locked */
50#define EP93XXFB_EOL_OFFSET 0x0230
51
52/* Other Video Registers */
53#define EP93XXFB_BRIGHTNESS 0x0020
54#define EP93XXFB_ATTRIBS 0x0024 /* SW locked */
55#define EP93XXFB_SWLOCK 0x007c /* SW locked */
56#define EP93XXFB_AC_RATE 0x0214
57#define EP93XXFB_FIFO_LEVEL 0x0234
58#define EP93XXFB_PIXELMODE 0x0054
59#define EP93XXFB_PIXELMODE_32BPP (0x7 << 0)
60#define EP93XXFB_PIXELMODE_24BPP (0x6 << 0)
61#define EP93XXFB_PIXELMODE_16BPP (0x4 << 0)
62#define EP93XXFB_PIXELMODE_8BPP (0x2 << 0)
63#define EP93XXFB_PIXELMODE_SHIFT_1P_24B (0x0 << 3)
64#define EP93XXFB_PIXELMODE_SHIFT_1P_18B (0x1 << 3)
65#define EP93XXFB_PIXELMODE_COLOR_LUT (0x0 << 10)
66#define EP93XXFB_PIXELMODE_COLOR_888 (0x4 << 10)
67#define EP93XXFB_PIXELMODE_COLOR_555 (0x5 << 10)
68#define EP93XXFB_PARL_IF_OUT 0x0058
69#define EP93XXFB_PARL_IF_IN 0x005c
70
71/* Blink Control Registers */
72#define EP93XXFB_BLINK_RATE 0x0040
73#define EP93XXFB_BLINK_MASK 0x0044
74#define EP93XXFB_BLINK_PATTRN 0x0048
75#define EP93XXFB_PATTRN_MASK 0x004c
76#define EP93XXFB_BKGRND_OFFSET 0x0050
77
78/* Hardware Cursor Registers */
79#define EP93XXFB_CURSOR_ADR_START 0x0060
80#define EP93XXFB_CURSOR_ADR_RESET 0x0064
81#define EP93XXFB_CURSOR_SIZE 0x0068
82#define EP93XXFB_CURSOR_COLOR1 0x006c
83#define EP93XXFB_CURSOR_COLOR2 0x0070
84#define EP93XXFB_CURSOR_BLINK_COLOR1 0x021c
85#define EP93XXFB_CURSOR_BLINK_COLOR2 0x0220
86#define EP93XXFB_CURSOR_XY_LOC 0x0074
87#define EP93XXFB_CURSOR_DSCAN_HY_LOC 0x0078
88#define EP93XXFB_CURSOR_BLINK_RATE_CTRL 0x0224
89
90/* LUT Registers */
91#define EP93XXFB_GRY_SCL_LUTR 0x0080
92#define EP93XXFB_GRY_SCL_LUTG 0x0280
93#define EP93XXFB_GRY_SCL_LUTB 0x0300
94#define EP93XXFB_LUT_SW_CONTROL 0x0218
95#define EP93XXFB_LUT_SW_CONTROL_SWTCH (1 << 0)
96#define EP93XXFB_LUT_SW_CONTROL_SSTAT (1 << 1)
97#define EP93XXFB_COLOR_LUT 0x0400
98
99/* Video Signature Registers */
100#define EP93XXFB_VID_SIG_RSLT_VAL 0x0200
101#define EP93XXFB_VID_SIG_CTRL 0x0204
102#define EP93XXFB_VSIG 0x0208
103#define EP93XXFB_HSIG 0x020c
104#define EP93XXFB_SIG_CLR_STR 0x0210
105
106/* Minimum / Maximum resolutions supported */
107#define EP93XXFB_MIN_XRES 64
108#define EP93XXFB_MIN_YRES 64
109#define EP93XXFB_MAX_XRES 1024
110#define EP93XXFB_MAX_YRES 768
111
112struct ep93xx_fbi {
113 struct ep93xxfb_mach_info *mach_info;
114 struct clk *clk;
115 struct resource *res;
116 void __iomem *mmio_base;
117 unsigned int pseudo_palette[256];
118};
119
120static int check_screenpage_bug = 1;
121module_param(check_screenpage_bug, int, 0644);
122MODULE_PARM_DESC(check_screenpage_bug,
123 "Check for bit 27 screen page bug. Default = 1");
124
125static inline unsigned int ep93xxfb_readl(struct ep93xx_fbi *fbi,
126 unsigned int off)
127{
128 return __raw_readl(fbi->mmio_base + off);
129}
130
131static inline void ep93xxfb_writel(struct ep93xx_fbi *fbi,
132 unsigned int val, unsigned int off)
133{
134 __raw_writel(val, fbi->mmio_base + off);
135}
136
137/*
138 * Write to one of the locked raster registers.
139 */
140static inline void ep93xxfb_out_locked(struct ep93xx_fbi *fbi,
141 unsigned int val, unsigned int reg)
142{
143 /*
144 * We don't need a lock or delay here since the raster register
145 * block will remain unlocked until the next access.
146 */
147 ep93xxfb_writel(fbi, 0xaa, EP93XXFB_SWLOCK);
148 ep93xxfb_writel(fbi, val, reg);
149}
150
151static void ep93xxfb_set_video_attribs(struct fb_info *info)
152{
153 struct ep93xx_fbi *fbi = info->par;
154 unsigned int attribs;
155
156 attribs = EP93XXFB_ENABLE;
157 attribs |= fbi->mach_info->flags;
158 ep93xxfb_out_locked(fbi, attribs, EP93XXFB_ATTRIBS);
159}
160
161static int ep93xxfb_set_pixelmode(struct fb_info *info)
162{
163 struct ep93xx_fbi *fbi = info->par;
164 unsigned int val;
165
166 info->var.transp.offset = 0;
167 info->var.transp.length = 0;
168
169 switch (info->var.bits_per_pixel) {
170 case 8:
171 val = EP93XXFB_PIXELMODE_8BPP | EP93XXFB_PIXELMODE_COLOR_LUT |
172 EP93XXFB_PIXELMODE_SHIFT_1P_18B;
173
174 info->var.red.offset = 0;
175 info->var.red.length = 8;
176 info->var.green.offset = 0;
177 info->var.green.length = 8;
178 info->var.blue.offset = 0;
179 info->var.blue.length = 8;
180 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
181 break;
182
183 case 16:
184 val = EP93XXFB_PIXELMODE_16BPP | EP93XXFB_PIXELMODE_COLOR_555 |
185 EP93XXFB_PIXELMODE_SHIFT_1P_18B;
186
187 info->var.red.offset = 11;
188 info->var.red.length = 5;
189 info->var.green.offset = 5;
190 info->var.green.length = 6;
191 info->var.blue.offset = 0;
192 info->var.blue.length = 5;
193 info->fix.visual = FB_VISUAL_TRUECOLOR;
194 break;
195
196 case 24:
197 val = EP93XXFB_PIXELMODE_24BPP | EP93XXFB_PIXELMODE_COLOR_888 |
198 EP93XXFB_PIXELMODE_SHIFT_1P_24B;
199
200 info->var.red.offset = 16;
201 info->var.red.length = 8;
202 info->var.green.offset = 8;
203 info->var.green.length = 8;
204 info->var.blue.offset = 0;
205 info->var.blue.length = 8;
206 info->fix.visual = FB_VISUAL_TRUECOLOR;
207 break;
208
209 case 32:
210 val = EP93XXFB_PIXELMODE_32BPP | EP93XXFB_PIXELMODE_COLOR_888 |
211 EP93XXFB_PIXELMODE_SHIFT_1P_24B;
212
213 info->var.red.offset = 16;
214 info->var.red.length = 8;
215 info->var.green.offset = 8;
216 info->var.green.length = 8;
217 info->var.blue.offset = 0;
218 info->var.blue.length = 8;
219 info->fix.visual = FB_VISUAL_TRUECOLOR;
220 break;
221
222 default:
223 return -EINVAL;
224 }
225
226 ep93xxfb_writel(fbi, val, EP93XXFB_PIXELMODE);
227 return 0;
228}
229
230static void ep93xxfb_set_timing(struct fb_info *info)
231{
232 struct ep93xx_fbi *fbi = info->par;
233 unsigned int vlines_total, hclks_total, start, stop;
234
235 vlines_total = info->var.yres + info->var.upper_margin +
236 info->var.lower_margin + info->var.vsync_len - 1;
237
238 hclks_total = info->var.xres + info->var.left_margin +
239 info->var.right_margin + info->var.hsync_len - 1;
240
241 ep93xxfb_out_locked(fbi, vlines_total, EP93XXFB_VLINES_TOTAL);
242 ep93xxfb_out_locked(fbi, hclks_total, EP93XXFB_HCLKS_TOTAL);
243
244 start = vlines_total;
245 stop = vlines_total - info->var.vsync_len;
246 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VSYNC);
247
248 start = vlines_total - info->var.vsync_len - info->var.upper_margin;
249 stop = info->var.lower_margin - 1;
250 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VBLANK);
251 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VACTIVE);
252
253 start = vlines_total;
254 stop = vlines_total + 1;
255 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VCLK);
256
257 start = hclks_total;
258 stop = hclks_total - info->var.hsync_len;
259 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HSYNC);
260
261 start = hclks_total - info->var.hsync_len - info->var.left_margin;
262 stop = info->var.right_margin - 1;
263 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HBLANK);
264 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HACTIVE);
265
266 start = hclks_total;
267 stop = hclks_total;
268 ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HCLK);
269
270 ep93xxfb_out_locked(fbi, 0x0, EP93XXFB_LINE_CARRY);
271}
272
273static int ep93xxfb_set_par(struct fb_info *info)
274{
275 struct ep93xx_fbi *fbi = info->par;
276
277 clk_set_rate(fbi->clk, 1000 * PICOS2KHZ(info->var.pixclock));
278
279 ep93xxfb_set_timing(info);
280
281 info->fix.line_length = info->var.xres_virtual *
282 info->var.bits_per_pixel / 8;
283
284 ep93xxfb_writel(fbi, info->fix.smem_start, EP93XXFB_SCREEN_PAGE);
285 ep93xxfb_writel(fbi, info->var.yres - 1, EP93XXFB_SCREEN_LINES);
286 ep93xxfb_writel(fbi, ((info->var.xres * info->var.bits_per_pixel)
287 / 32) - 1, EP93XXFB_LINE_LENGTH);
288 ep93xxfb_writel(fbi, info->fix.line_length / 4, EP93XXFB_VLINE_STEP);
289 ep93xxfb_set_video_attribs(info);
290 return 0;
291}
292
293static int ep93xxfb_check_var(struct fb_var_screeninfo *var,
294 struct fb_info *info)
295{
296 int err;
297
298 err = ep93xxfb_set_pixelmode(info);
299 if (err)
300 return err;
301
302 var->xres = max_t(unsigned int, var->xres, EP93XXFB_MIN_XRES);
303 var->xres = min_t(unsigned int, var->xres, EP93XXFB_MAX_XRES);
304 var->xres_virtual = max(var->xres_virtual, var->xres);
305
306 var->yres = max_t(unsigned int, var->yres, EP93XXFB_MIN_YRES);
307 var->yres = min_t(unsigned int, var->yres, EP93XXFB_MAX_YRES);
308 var->yres_virtual = max(var->yres_virtual, var->yres);
309
310 return 0;
311}
312
313static int ep93xxfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
314{
315 unsigned int offset = vma->vm_pgoff << PAGE_SHIFT;
316
317 if (offset < info->fix.smem_len) {
318 return dma_mmap_writecombine(info->dev, vma, info->screen_base,
319 info->fix.smem_start,
320 info->fix.smem_len);
321 }
322
323 return -EINVAL;
324}
325
326static int ep93xxfb_blank(int blank_mode, struct fb_info *info)
327{
328 struct ep93xx_fbi *fbi = info->par;
329 unsigned int attribs = ep93xxfb_readl(fbi, EP93XXFB_ATTRIBS);
330
331 if (blank_mode) {
332 if (fbi->mach_info->blank)
333 fbi->mach_info->blank(blank_mode, info);
334 ep93xxfb_out_locked(fbi, attribs & ~EP93XXFB_ENABLE,
335 EP93XXFB_ATTRIBS);
336 clk_disable(fbi->clk);
337 } else {
338 clk_enable(fbi->clk);
339 ep93xxfb_out_locked(fbi, attribs | EP93XXFB_ENABLE,
340 EP93XXFB_ATTRIBS);
341 if (fbi->mach_info->blank)
342 fbi->mach_info->blank(blank_mode, info);
343 }
344
345 return 0;
346}
347
348static inline int ep93xxfb_convert_color(int val, int width)
349{
350 return ((val << width) + 0x7fff - val) >> 16;
351}
352
353static int ep93xxfb_setcolreg(unsigned int regno, unsigned int red,
354 unsigned int green, unsigned int blue,
355 unsigned int transp, struct fb_info *info)
356{
357 struct ep93xx_fbi *fbi = info->par;
358 unsigned int *pal = info->pseudo_palette;
359 unsigned int ctrl, i, rgb, lut_current, lut_stat;
360
361 switch (info->fix.visual) {
362 case FB_VISUAL_PSEUDOCOLOR:
Krzysztof Helt2f390382009-12-15 16:46:25 -0800363 if (regno > 255)
364 return 1;
Ryan Mallon88017bda2009-09-22 16:47:09 -0700365 rgb = ((red & 0xff00) << 8) | (green & 0xff00) |
366 ((blue & 0xff00) >> 8);
367
368 pal[regno] = rgb;
369 ep93xxfb_writel(fbi, rgb, (EP93XXFB_COLOR_LUT + (regno << 2)));
370 ctrl = ep93xxfb_readl(fbi, EP93XXFB_LUT_SW_CONTROL);
371 lut_stat = !!(ctrl & EP93XXFB_LUT_SW_CONTROL_SSTAT);
372 lut_current = !!(ctrl & EP93XXFB_LUT_SW_CONTROL_SWTCH);
373
374 if (lut_stat == lut_current) {
375 for (i = 0; i < 256; i++) {
376 ep93xxfb_writel(fbi, pal[i],
377 EP93XXFB_COLOR_LUT + (i << 2));
378 }
379
380 ep93xxfb_writel(fbi,
381 ctrl ^ EP93XXFB_LUT_SW_CONTROL_SWTCH,
382 EP93XXFB_LUT_SW_CONTROL);
383 }
384 break;
385
386 case FB_VISUAL_TRUECOLOR:
387 if (regno > 16)
388 return 1;
389
390 red = ep93xxfb_convert_color(red, info->var.red.length);
391 green = ep93xxfb_convert_color(green, info->var.green.length);
392 blue = ep93xxfb_convert_color(blue, info->var.blue.length);
393 transp = ep93xxfb_convert_color(transp,
394 info->var.transp.length);
395
396 pal[regno] = (red << info->var.red.offset) |
397 (green << info->var.green.offset) |
398 (blue << info->var.blue.offset) |
399 (transp << info->var.transp.offset);
400 break;
401
402 default:
403 return 1;
404 }
405
406 return 0;
407}
408
409static struct fb_ops ep93xxfb_ops = {
410 .owner = THIS_MODULE,
411 .fb_check_var = ep93xxfb_check_var,
412 .fb_set_par = ep93xxfb_set_par,
413 .fb_blank = ep93xxfb_blank,
414 .fb_fillrect = cfb_fillrect,
415 .fb_copyarea = cfb_copyarea,
416 .fb_imageblit = cfb_imageblit,
417 .fb_setcolreg = ep93xxfb_setcolreg,
418 .fb_mmap = ep93xxfb_mmap,
419};
420
421static int __init ep93xxfb_calc_fbsize(struct ep93xxfb_mach_info *mach_info)
422{
423 int i, fb_size = 0;
424
425 if (mach_info->num_modes == EP93XXFB_USE_MODEDB) {
426 fb_size = EP93XXFB_MAX_XRES * EP93XXFB_MAX_YRES *
427 mach_info->bpp / 8;
428 } else {
429 for (i = 0; i < mach_info->num_modes; i++) {
430 const struct fb_videomode *mode;
431 int size;
432
433 mode = &mach_info->modes[i];
434 size = mode->xres * mode->yres * mach_info->bpp / 8;
435 if (size > fb_size)
436 fb_size = size;
437 }
438 }
439
440 return fb_size;
441}
442
443static int __init ep93xxfb_alloc_videomem(struct fb_info *info)
444{
445 struct ep93xx_fbi *fbi = info->par;
446 char __iomem *virt_addr;
447 dma_addr_t phys_addr;
448 unsigned int fb_size;
449
450 fb_size = ep93xxfb_calc_fbsize(fbi->mach_info);
451 virt_addr = dma_alloc_writecombine(info->dev, fb_size,
452 &phys_addr, GFP_KERNEL);
453 if (!virt_addr)
454 return -ENOMEM;
455
456 /*
457 * There is a bug in the ep93xx framebuffer which causes problems
458 * if bit 27 of the physical address is set.
459 * See: http://marc.info/?l=linux-arm-kernel&m=110061245502000&w=2
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300460 * There does not seem to be any official errata for this, but I
Ryan Mallon88017bda2009-09-22 16:47:09 -0700461 * have confirmed the problem exists on my hardware (ep9315) at
462 * least.
463 */
464 if (check_screenpage_bug && phys_addr & (1 << 27)) {
465 dev_err(info->dev, "ep93xx framebuffer bug. phys addr (0x%x) "
466 "has bit 27 set: cannot init framebuffer\n",
467 phys_addr);
468
469 dma_free_coherent(info->dev, fb_size, virt_addr, phys_addr);
470 return -ENOMEM;
471 }
472
473 info->fix.smem_start = phys_addr;
474 info->fix.smem_len = fb_size;
475 info->screen_base = virt_addr;
476
477 return 0;
478}
479
480static void ep93xxfb_dealloc_videomem(struct fb_info *info)
481{
482 if (info->screen_base)
483 dma_free_coherent(info->dev, info->fix.smem_len,
484 info->screen_base, info->fix.smem_start);
485}
486
Ryan Mallonc0fdcfa2011-01-10 20:49:27 +0100487static int __devinit ep93xxfb_probe(struct platform_device *pdev)
Ryan Mallon88017bda2009-09-22 16:47:09 -0700488{
489 struct ep93xxfb_mach_info *mach_info = pdev->dev.platform_data;
490 struct fb_info *info;
491 struct ep93xx_fbi *fbi;
492 struct resource *res;
493 char *video_mode;
494 int err;
495
496 if (!mach_info)
497 return -EINVAL;
498
499 info = framebuffer_alloc(sizeof(struct ep93xx_fbi), &pdev->dev);
500 if (!info)
501 return -ENOMEM;
502
503 info->dev = &pdev->dev;
504 platform_set_drvdata(pdev, info);
505 fbi = info->par;
506 fbi->mach_info = mach_info;
507
508 err = fb_alloc_cmap(&info->cmap, 256, 0);
509 if (err)
Julia Lawall045dfdb2012-04-18 21:37:08 +0200510 goto failed_cmap;
Ryan Mallon88017bda2009-09-22 16:47:09 -0700511
512 err = ep93xxfb_alloc_videomem(info);
513 if (err)
Julia Lawall045dfdb2012-04-18 21:37:08 +0200514 goto failed_videomem;
Ryan Mallon88017bda2009-09-22 16:47:09 -0700515
516 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
517 if (!res) {
518 err = -ENXIO;
Julia Lawall045dfdb2012-04-18 21:37:08 +0200519 goto failed_resource;
Ryan Mallon88017bda2009-09-22 16:47:09 -0700520 }
521
Ryan Mallon0fd19582012-01-22 20:31:32 +1100522 /*
523 * FIXME - We don't do a request_mem_region here because we are
524 * sharing the register space with the backlight driver (see
525 * drivers/video/backlight/ep93xx_bl.c) and doing so will cause
526 * the second loaded driver to return -EBUSY.
527 *
528 * NOTE: No locking is required; the backlight does not touch
529 * any of the framebuffer registers.
530 */
Ryan Mallon88017bda2009-09-22 16:47:09 -0700531 fbi->res = res;
Damien Cassoube867812012-07-31 15:54:16 +0200532 fbi->mmio_base = devm_ioremap(&pdev->dev, res->start,
533 resource_size(res));
Ryan Mallon88017bda2009-09-22 16:47:09 -0700534 if (!fbi->mmio_base) {
535 err = -ENXIO;
Julia Lawall045dfdb2012-04-18 21:37:08 +0200536 goto failed_resource;
Ryan Mallon88017bda2009-09-22 16:47:09 -0700537 }
538
539 strcpy(info->fix.id, pdev->name);
540 info->fbops = &ep93xxfb_ops;
541 info->fix.type = FB_TYPE_PACKED_PIXELS;
542 info->fix.accel = FB_ACCEL_NONE;
543 info->var.activate = FB_ACTIVATE_NOW;
544 info->var.vmode = FB_VMODE_NONINTERLACED;
545 info->flags = FBINFO_DEFAULT;
546 info->node = -1;
547 info->state = FBINFO_STATE_RUNNING;
548 info->pseudo_palette = &fbi->pseudo_palette;
549
550 fb_get_options("ep93xx-fb", &video_mode);
551 err = fb_find_mode(&info->var, info, video_mode,
552 fbi->mach_info->modes, fbi->mach_info->num_modes,
553 fbi->mach_info->default_mode, fbi->mach_info->bpp);
554 if (err == 0) {
555 dev_err(info->dev, "No suitable video mode found\n");
556 err = -EINVAL;
Damien Cassoube867812012-07-31 15:54:16 +0200557 goto failed_resource;
Ryan Mallon88017bda2009-09-22 16:47:09 -0700558 }
559
560 if (mach_info->setup) {
561 err = mach_info->setup(pdev);
562 if (err)
Damien Cassoube867812012-07-31 15:54:16 +0200563 goto failed_resource;
Ryan Mallon88017bda2009-09-22 16:47:09 -0700564 }
565
566 err = ep93xxfb_check_var(&info->var, info);
567 if (err)
Julia Lawall045dfdb2012-04-18 21:37:08 +0200568 goto failed_check;
Ryan Mallon88017bda2009-09-22 16:47:09 -0700569
Damien Cassoube867812012-07-31 15:54:16 +0200570 fbi->clk = devm_clk_get(&pdev->dev, NULL);
Ryan Mallon88017bda2009-09-22 16:47:09 -0700571 if (IS_ERR(fbi->clk)) {
572 err = PTR_ERR(fbi->clk);
573 fbi->clk = NULL;
Julia Lawall045dfdb2012-04-18 21:37:08 +0200574 goto failed_check;
Ryan Mallon88017bda2009-09-22 16:47:09 -0700575 }
576
577 ep93xxfb_set_par(info);
578 clk_enable(fbi->clk);
579
580 err = register_framebuffer(info);
581 if (err)
Damien Cassoube867812012-07-31 15:54:16 +0200582 goto failed_check;
Ryan Mallon88017bda2009-09-22 16:47:09 -0700583
584 dev_info(info->dev, "registered. Mode = %dx%d-%d\n",
585 info->var.xres, info->var.yres, info->var.bits_per_pixel);
586 return 0;
587
Julia Lawall045dfdb2012-04-18 21:37:08 +0200588failed_check:
Ryan Mallon88017bda2009-09-22 16:47:09 -0700589 if (fbi->mach_info->teardown)
590 fbi->mach_info->teardown(pdev);
Julia Lawall045dfdb2012-04-18 21:37:08 +0200591failed_resource:
592 ep93xxfb_dealloc_videomem(info);
593failed_videomem:
594 fb_dealloc_cmap(&info->cmap);
595failed_cmap:
Ryan Mallon88017bda2009-09-22 16:47:09 -0700596 kfree(info);
597 platform_set_drvdata(pdev, NULL);
598
599 return err;
600}
601
Ryan Mallonc0fdcfa2011-01-10 20:49:27 +0100602static int __devexit ep93xxfb_remove(struct platform_device *pdev)
Ryan Mallon88017bda2009-09-22 16:47:09 -0700603{
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);
Ryan Mallon88017bda2009-09-22 16:47:09 -0700609 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 platform_set_drvdata(pdev, NULL);
617
618 return 0;
619}
620
621static struct platform_driver ep93xxfb_driver = {
622 .probe = ep93xxfb_probe,
Ryan Mallonc0fdcfa2011-01-10 20:49:27 +0100623 .remove = __devexit_p(ep93xxfb_remove),
Ryan Mallon88017bda2009-09-22 16:47:09 -0700624 .driver = {
625 .name = "ep93xx-fb",
626 .owner = THIS_MODULE,
627 },
628};
629
630static int __devinit ep93xxfb_init(void)
631{
632 return platform_driver_register(&ep93xxfb_driver);
633}
634
635static void __exit ep93xxfb_exit(void)
636{
637 platform_driver_unregister(&ep93xxfb_driver);
638}
639
640module_init(ep93xxfb_init);
641module_exit(ep93xxfb_exit);
642
643MODULE_DESCRIPTION("EP93XX Framebuffer Driver");
644MODULE_ALIAS("platform:ep93xx-fb");
Ryan Mallon1c5454e2011-06-15 14:45:36 +1000645MODULE_AUTHOR("Ryan Mallon, "
Ryan Mallon88017bda2009-09-22 16:47:09 -0700646 "H Hartley Sweeten <hsweeten@visionengravers.com");
647MODULE_LICENSE("GPL");