[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / wm8505fb.c

/*
 *  WonderMedia WM8505 Frame Buffer device driver
 *
 *  Copyright (C) 2010 Ed Spiridonov <edo.rus@gmail.com>
 *    Based on vt8500lcdfb.c
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/wait.h>

#include <mach/vt8500fb.h>

#include "wm8505fb_regs.h"
#include "wmt_ge_rops.h"

#define DRIVER_NAME "wm8505-fb"

#define to_wm8505fb_info(__info) container_of(__info, \
						struct wm8505fb_info, fb)
struct wm8505fb_info {
	struct fb_info		fb;
	void __iomem		*regbase;
	unsigned int		contrast;
};


static int wm8505fb_init_hw(struct fb_info *info)
{
	struct wm8505fb_info *fbi = to_wm8505fb_info(info);

	int i;

	/* I know the purpose only of few registers, so clear unknown */
	for (i = 0; i < 0x200; i += 4)
		writel(0, fbi->regbase + i);

	/* Set frame buffer address */
	writel(fbi->fb.fix.smem_start, fbi->regbase + WMT_GOVR_FBADDR);
	writel(fbi->fb.fix.smem_start, fbi->regbase + WMT_GOVR_FBADDR1);

	/* Set in-memory picture format to RGB 32bpp */
	writel(0x1c,		       fbi->regbase + WMT_GOVR_COLORSPACE);
	writel(1,		       fbi->regbase + WMT_GOVR_COLORSPACE1);

	/* Virtual buffer size */
	writel(info->var.xres,	       fbi->regbase + WMT_GOVR_XRES);
	writel(info->var.xres_virtual, fbi->regbase + WMT_GOVR_XRES_VIRTUAL);

	/* black magic ;) */
	writel(0xf,		       fbi->regbase + WMT_GOVR_FHI);
	writel(4,		       fbi->regbase + WMT_GOVR_DVO_SET);
	writel(1,		       fbi->regbase + WMT_GOVR_MIF_ENABLE);
	writel(1,		       fbi->regbase + WMT_GOVR_REG_UPDATE);

	return 0;
}

static int wm8505fb_set_timing(struct fb_info *info)
{
	struct wm8505fb_info *fbi = to_wm8505fb_info(info);

	int h_start = info->var.left_margin;
	int h_end = h_start + info->var.xres;
	int h_all = h_end + info->var.right_margin;
	int h_sync = info->var.hsync_len;

	int v_start = info->var.upper_margin;
	int v_end = v_start + info->var.yres;
	int v_all = v_end + info->var.lower_margin;
	int v_sync = info->var.vsync_len;

	writel(0, fbi->regbase + WMT_GOVR_TG);

	writel(h_start, fbi->regbase + WMT_GOVR_TIMING_H_START);
	writel(h_end,   fbi->regbase + WMT_GOVR_TIMING_H_END);
	writel(h_all,   fbi->regbase + WMT_GOVR_TIMING_H_ALL);
	writel(h_sync,  fbi->regbase + WMT_GOVR_TIMING_H_SYNC);

	writel(v_start, fbi->regbase + WMT_GOVR_TIMING_V_START);
	writel(v_end,   fbi->regbase + WMT_GOVR_TIMING_V_END);
	writel(v_all,   fbi->regbase + WMT_GOVR_TIMING_V_ALL);
	writel(v_sync,  fbi->regbase + WMT_GOVR_TIMING_V_SYNC);

	writel(1, fbi->regbase + WMT_GOVR_TG);

	return 0;
}


static int wm8505fb_set_par(struct fb_info *info)
{
	struct wm8505fb_info *fbi = to_wm8505fb_info(info);

	if (!fbi)
		return -EINVAL;

	if (info->var.bits_per_pixel == 32) {
		info->var.red.offset = 16;
		info->var.red.length = 8;
		info->var.red.msb_right = 0;
		info->var.green.offset = 8;
		info->var.green.length = 8;
		info->var.green.msb_right = 0;
		info->var.blue.offset = 0;
		info->var.blue.length = 8;
		info->var.blue.msb_right = 0;
		info->fix.visual = FB_VISUAL_TRUECOLOR;
		info->fix.line_length = info->var.xres_virtual << 2;
	}

	wm8505fb_set_timing(info);

	writel(fbi->contrast<<16 | fbi->contrast<<8 | fbi->contrast,
		fbi->regbase + WMT_GOVR_CONTRAST);

	return 0;
}

static ssize_t contrast_show(struct device *dev,
			     struct device_attribute *attr, char *buf)
{
	struct fb_info *info = dev_get_drvdata(dev);
	struct wm8505fb_info *fbi = to_wm8505fb_info(info);

	return sprintf(buf, "%d\n", fbi->contrast);
}

static ssize_t contrast_store(struct device *dev,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
	struct fb_info *info = dev_get_drvdata(dev);
	struct wm8505fb_info *fbi = to_wm8505fb_info(info);
	unsigned long tmp;

	if (strict_strtoul(buf, 10, &tmp) || (tmp > 0xff))
		return -EINVAL;
	fbi->contrast = tmp;

	wm8505fb_set_par(info);

	return count;
}

static DEVICE_ATTR(contrast, 0644, contrast_show, contrast_store);

static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
{
	chan &= 0xffff;
	chan >>= 16 - bf->length;
	return chan << bf->offset;
}

static int wm8505fb_setcolreg(unsigned regno, unsigned red, unsigned green,
			   unsigned blue, unsigned transp,
			   struct fb_info *info) {
	struct wm8505fb_info *fbi = to_wm8505fb_info(info);
	int ret = 1;
	unsigned int val;
	if (regno >= 256)
		return -EINVAL;

	if (info->var.grayscale)
		red = green = blue =
			(19595 * red + 38470 * green + 7471 * blue) >> 16;

	switch (fbi->fb.fix.visual) {
	case FB_VISUAL_TRUECOLOR:
		if (regno < 16) {
			u32 *pal = info->pseudo_palette;

			val  = chan_to_field(red, &fbi->fb.var.red);
			val |= chan_to_field(green, &fbi->fb.var.green);
			val |= chan_to_field(blue, &fbi->fb.var.blue);

			pal[regno] = val;
			ret = 0;
		}
		break;
	}

	return ret;
}

static int wm8505fb_pan_display(struct fb_var_screeninfo *var,
				struct fb_info *info)
{
	struct wm8505fb_info *fbi = to_wm8505fb_info(info);

	writel(var->xoffset, fbi->regbase + WMT_GOVR_XPAN);
	writel(var->yoffset, fbi->regbase + WMT_GOVR_YPAN);
	return 0;
}

static int wm8505fb_blank(int blank, struct fb_info *info)
{
	struct wm8505fb_info *fbi = to_wm8505fb_info(info);

	switch (blank) {
	case FB_BLANK_UNBLANK:
		wm8505fb_set_timing(info);
		break;
	default:
		writel(0,  fbi->regbase + WMT_GOVR_TIMING_V_SYNC);
		break;
	}

	return 0;
}

static struct fb_ops wm8505fb_ops = {
	.owner		= THIS_MODULE,
	.fb_set_par	= wm8505fb_set_par,
	.fb_setcolreg	= wm8505fb_setcolreg,
	.fb_fillrect	= wmt_ge_fillrect,
	.fb_copyarea	= wmt_ge_copyarea,
	.fb_imageblit	= sys_imageblit,
	.fb_sync	= wmt_ge_sync,
	.fb_pan_display	= wm8505fb_pan_display,
	.fb_blank	= wm8505fb_blank,
};

static int __devinit wm8505fb_probe(struct platform_device *pdev)
{
	struct wm8505fb_info	*fbi;
	struct resource		*res;
	void			*addr;
	struct vt8500fb_platform_data *pdata;
	int ret;

	pdata = pdev->dev.platform_data;

	ret = -ENOMEM;
	fbi = NULL;

	fbi = kzalloc(sizeof(struct wm8505fb_info) + sizeof(u32) * 16,
							GFP_KERNEL);
	if (!fbi) {
		dev_err(&pdev->dev, "Failed to initialize framebuffer device\n");
		ret = -ENOMEM;
		goto failed;
	}

	strcpy(fbi->fb.fix.id, DRIVER_NAME);

	fbi->fb.fix.type	= FB_TYPE_PACKED_PIXELS;
	fbi->fb.fix.xpanstep	= 1;
	fbi->fb.fix.ypanstep	= 1;
	fbi->fb.fix.ywrapstep	= 0;
	fbi->fb.fix.accel	= FB_ACCEL_NONE;

	fbi->fb.fbops		= &wm8505fb_ops;
	fbi->fb.flags		= FBINFO_DEFAULT
				| FBINFO_HWACCEL_COPYAREA
				| FBINFO_HWACCEL_FILLRECT
				| FBINFO_HWACCEL_XPAN
				| FBINFO_HWACCEL_YPAN
				| FBINFO_VIRTFB
				| FBINFO_PARTIAL_PAN_OK;
	fbi->fb.node		= -1;

	addr = fbi;
	addr = addr + sizeof(struct wm8505fb_info);
	fbi->fb.pseudo_palette	= addr;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "no I/O memory resource defined\n");
		ret = -ENODEV;
		goto failed_fbi;
	}

	res = request_mem_region(res->start, resource_size(res), DRIVER_NAME);
	if (res == NULL) {
		dev_err(&pdev->dev, "failed to request I/O memory\n");
		ret = -EBUSY;
		goto failed_fbi;
	}

	fbi->regbase = ioremap(res->start, resource_size(res));
	if (fbi->regbase == NULL) {
		dev_err(&pdev->dev, "failed to map I/O memory\n");
		ret = -EBUSY;
		goto failed_free_res;
	}

	fb_videomode_to_var(&fbi->fb.var, &pdata->mode);

	fbi->fb.var.nonstd		= 0;
	fbi->fb.var.activate		= FB_ACTIVATE_NOW;

	fbi->fb.var.height		= -1;
	fbi->fb.var.width		= -1;
	fbi->fb.var.xres_virtual	= pdata->xres_virtual;
	fbi->fb.var.yres_virtual	= pdata->yres_virtual;
	fbi->fb.var.bits_per_pixel	= pdata->bpp;

	fbi->fb.fix.smem_start	= pdata->video_mem_phys;
	fbi->fb.fix.smem_len	= pdata->video_mem_len;
	fbi->fb.screen_base	= pdata->video_mem_virt;
	fbi->fb.screen_size	= pdata->video_mem_len;

	if (fb_alloc_cmap(&fbi->fb.cmap, 256, 0) < 0) {
		dev_err(&pdev->dev, "Failed to allocate color map\n");
		ret = -ENOMEM;
		goto failed_free_io;
	}

	wm8505fb_init_hw(&fbi->fb);

	fbi->contrast = 0x80;
	ret = wm8505fb_set_par(&fbi->fb);
	if (ret) {
		dev_err(&pdev->dev, "Failed to set parameters\n");
		goto failed_free_cmap;
	}

	platform_set_drvdata(pdev, fbi);

	ret = register_framebuffer(&fbi->fb);
	if (ret < 0) {
		dev_err(&pdev->dev,
			"Failed to register framebuffer device: %d\n", ret);
		goto failed_free_cmap;
	}

	ret = device_create_file(&pdev->dev, &dev_attr_contrast);
	if (ret < 0) {
		printk(KERN_WARNING "fb%d: failed to register attributes (%d)\n",
			fbi->fb.node, ret);
	}

	printk(KERN_INFO "fb%d: %s frame buffer at 0x%lx-0x%lx\n",
	       fbi->fb.node, fbi->fb.fix.id, fbi->fb.fix.smem_start,
	       fbi->fb.fix.smem_start + fbi->fb.fix.smem_len - 1);

	return 0;

failed_free_cmap:
	if (fbi->fb.cmap.len)
		fb_dealloc_cmap(&fbi->fb.cmap);
failed_free_io:
	iounmap(fbi->regbase);
failed_free_res:
	release_mem_region(res->start, resource_size(res));
failed_fbi:
	platform_set_drvdata(pdev, NULL);
	kfree(fbi);
failed:
	return ret;
}

static int __devexit wm8505fb_remove(struct platform_device *pdev)
{
	struct wm8505fb_info *fbi = platform_get_drvdata(pdev);
	struct resource *res;

	device_remove_file(&pdev->dev, &dev_attr_contrast);

	unregister_framebuffer(&fbi->fb);

	writel(0, fbi->regbase);

	if (fbi->fb.cmap.len)
		fb_dealloc_cmap(&fbi->fb.cmap);

	iounmap(fbi->regbase);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	release_mem_region(res->start, resource_size(res));

	kfree(fbi);

	return 0;
}

static struct platform_driver wm8505fb_driver = {
	.probe		= wm8505fb_probe,
	.remove		= __devexit_p(wm8505fb_remove),
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= DRIVER_NAME,
	},
};

static int __init wm8505fb_init(void)
{
	return platform_driver_register(&wm8505fb_driver);
}

static void __exit wm8505fb_exit(void)
{
	platform_driver_unregister(&wm8505fb_driver);
}

module_init(wm8505fb_init);
module_exit(wm8505fb_exit);

MODULE_AUTHOR("Ed Spiridonov <edo.rus@gmail.com>");
MODULE_DESCRIPTION("Framebuffer driver for WMT WM8505");
MODULE_LICENSE("GPL");
Commit	Line	Data
d6ff7d0f AC	1	/*
	2	* WonderMedia WM8505 Frame Buffer device driver
	3	*
	4	* Copyright (C) 2010 Ed Spiridonov <edo.rus@gmail.com>
	5	* Based on vt8500lcdfb.c
	6	*
	7	* This software is licensed under the terms of the GNU General Public
	8	* License version 2, as published by the Free Software Foundation, and
	9	* may be copied, distributed, and modified under those terms.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*/
	16
	17	#include <linux/module.h>
	18	#include <linux/kernel.h>
	19	#include <linux/errno.h>
	20	#include <linux/string.h>
	21	#include <linux/mm.h>
	22	#include <linux/slab.h>
	23	#include <linux/delay.h>
	24	#include <linux/fb.h>
	25	#include <linux/init.h>
	26	#include <linux/interrupt.h>
	27	#include <linux/io.h>
	28	#include <linux/dma-mapping.h>
	29	#include <linux/platform_device.h>
	30	#include <linux/wait.h>
	31
	32	#include <mach/vt8500fb.h>
	33
	34	#include "wm8505fb_regs.h"
	35	#include "wmt_ge_rops.h"
	36
	37	#define DRIVER_NAME "wm8505-fb"
	38
	39	#define to_wm8505fb_info(__info) container_of(__info, \
	40	struct wm8505fb_info, fb)
	41	struct wm8505fb_info {
	42	struct fb_info fb;
	43	void __iomem *regbase;
	44	unsigned int contrast;
	45	};
	46
	47
	48	static int wm8505fb_init_hw(struct fb_info *info)
	49	{
	50	struct wm8505fb_info *fbi = to_wm8505fb_info(info);
	51
	52	int i;
	53
	54	/* I know the purpose only of few registers, so clear unknown */
	55	for (i = 0; i < 0x200; i += 4)
	56	writel(0, fbi->regbase + i);
	57
	58	/* Set frame buffer address */
	59	writel(fbi->fb.fix.smem_start, fbi->regbase + WMT_GOVR_FBADDR);
	60	writel(fbi->fb.fix.smem_start, fbi->regbase + WMT_GOVR_FBADDR1);
	61
	62	/* Set in-memory picture format to RGB 32bpp */
	63	writel(0x1c, fbi->regbase + WMT_GOVR_COLORSPACE);
	64	writel(1, fbi->regbase + WMT_GOVR_COLORSPACE1);
65
66	/* Virtual buffer size */
67	writel(info->var.xres, fbi->regbase + WMT_GOVR_XRES);
68	writel(info->var.xres_virtual, fbi->regbase + WMT_GOVR_XRES_VIRTUAL);
69
70	/* black magic ;) */
71	writel(0xf, fbi->regbase + WMT_GOVR_FHI);
72	writel(4, fbi->regbase + WMT_GOVR_DVO_SET);
73	writel(1, fbi->regbase + WMT_GOVR_MIF_ENABLE);
74	writel(1, fbi->regbase + WMT_GOVR_REG_UPDATE);
75
76	return 0;
77	}
78
79	static int wm8505fb_set_timing(struct fb_info *info)
80	{
81	struct wm8505fb_info *fbi = to_wm8505fb_info(info);
82
83	int h_start = info->var.left_margin;
84	int h_end = h_start + info->var.xres;
85	int h_all = h_end + info->var.right_margin;
86	int h_sync = info->var.hsync_len;
87
88	int v_start = info->var.upper_margin;
89	int v_end = v_start + info->var.yres;
90	int v_all = v_end + info->var.lower_margin;
623eb156	91	int v_sync = info->var.vsync_len;
d6ff7d0f AC	92
	93	writel(0, fbi->regbase + WMT_GOVR_TG);
	94
	95	writel(h_start, fbi->regbase + WMT_GOVR_TIMING_H_START);
	96	writel(h_end, fbi->regbase + WMT_GOVR_TIMING_H_END);
	97	writel(h_all, fbi->regbase + WMT_GOVR_TIMING_H_ALL);
	98	writel(h_sync, fbi->regbase + WMT_GOVR_TIMING_H_SYNC);
	99
	100	writel(v_start, fbi->regbase + WMT_GOVR_TIMING_V_START);
	101	writel(v_end, fbi->regbase + WMT_GOVR_TIMING_V_END);
	102	writel(v_all, fbi->regbase + WMT_GOVR_TIMING_V_ALL);
	103	writel(v_sync, fbi->regbase + WMT_GOVR_TIMING_V_SYNC);
	104
	105	writel(1, fbi->regbase + WMT_GOVR_TG);
	106
	107	return 0;
	108	}
	109
	110
	111	static int wm8505fb_set_par(struct fb_info *info)
	112	{
	113	struct wm8505fb_info *fbi = to_wm8505fb_info(info);
	114
	115	if (!fbi)
	116	return -EINVAL;
	117
	118	if (info->var.bits_per_pixel == 32) {
	119	info->var.red.offset = 16;
	120	info->var.red.length = 8;
	121	info->var.red.msb_right = 0;
	122	info->var.green.offset = 8;
	123	info->var.green.length = 8;
	124	info->var.green.msb_right = 0;
	125	info->var.blue.offset = 0;
	126	info->var.blue.length = 8;
	127	info->var.blue.msb_right = 0;
	128	info->fix.visual = FB_VISUAL_TRUECOLOR;
	129	info->fix.line_length = info->var.xres_virtual << 2;
	130	}
	131
	132	wm8505fb_set_timing(info);
	133
	134	writel(fbi->contrast<<16 \| fbi->contrast<<8 \| fbi->contrast,
	135	fbi->regbase + WMT_GOVR_CONTRAST);
	136
	137	return 0;
	138	}
	139
	140	static ssize_t contrast_show(struct device *dev,
	141	struct device_attribute attr, char buf)
	142	{
	143	struct fb_info *info = dev_get_drvdata(dev);
	144	struct wm8505fb_info *fbi = to_wm8505fb_info(info);
	145
	146	return sprintf(buf, "%d\n", fbi->contrast);
	147	}
	148
	149	static ssize_t contrast_store(struct device *dev,
	150	struct device_attribute *attr,
	151	const char *buf, size_t count)
	152	{
	153	struct fb_info *info = dev_get_drvdata(dev);
	154	struct wm8505fb_info *fbi = to_wm8505fb_info(info);
	155	unsigned long tmp;
156
157	if (strict_strtoul(buf, 10, &tmp) \|\| (tmp > 0xff))
158	return -EINVAL;
159	fbi->contrast = tmp;
160
161	wm8505fb_set_par(info);
162
163	return count;
164	}
165
166	static DEVICE_ATTR(contrast, 0644, contrast_show, contrast_store);
167
168	static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
169	{
170	chan &= 0xffff;
171	chan >>= 16 - bf->length;
172	return chan << bf->offset;
173	}
174
175	static int wm8505fb_setcolreg(unsigned regno, unsigned red, unsigned green,
176	unsigned blue, unsigned transp,
177	struct fb_info *info) {
178	struct wm8505fb_info *fbi = to_wm8505fb_info(info);
179	int ret = 1;
180	unsigned int val;
181	if (regno >= 256)
182	return -EINVAL;
183
184	if (info->var.grayscale)
185	red = green = blue =
186	(19595 * red + 38470 * green + 7471 * blue) >> 16;
187
188	switch (fbi->fb.fix.visual) {
189	case FB_VISUAL_TRUECOLOR:
190	if (regno < 16) {
191	u32 *pal = info->pseudo_palette;
192
193	val = chan_to_field(red, &fbi->fb.var.red);
194	val \|= chan_to_field(green, &fbi->fb.var.green);
195	val \|= chan_to_field(blue, &fbi->fb.var.blue);
196
197	pal[regno] = val;
198	ret = 0;
199	}
200	break;
201	}
202
203	return ret;
204	}
205
206	static int wm8505fb_pan_display(struct fb_var_screeninfo *var,
207	struct fb_info *info)
208	{
209	struct wm8505fb_info *fbi = to_wm8505fb_info(info);
210
211	writel(var->xoffset, fbi->regbase + WMT_GOVR_XPAN);
212	writel(var->yoffset, fbi->regbase + WMT_GOVR_YPAN);
213	return 0;
214	}
215
216	static int wm8505fb_blank(int blank, struct fb_info *info)
217	{
218	struct wm8505fb_info *fbi = to_wm8505fb_info(info);
219
220	switch (blank) {
221	case FB_BLANK_UNBLANK:
222	wm8505fb_set_timing(info);
223	break;
224	default:
225	writel(0, fbi->regbase + WMT_GOVR_TIMING_V_SYNC);
226	break;
227	}
228
229	return 0;
230	}
231
232	static struct fb_ops wm8505fb_ops = {
233	.owner = THIS_MODULE,
234	.fb_set_par = wm8505fb_set_par,
235	.fb_setcolreg = wm8505fb_setcolreg,
236	.fb_fillrect = wmt_ge_fillrect,
237	.fb_copyarea = wmt_ge_copyarea,
238	.fb_imageblit = sys_imageblit,
239	.fb_sync = wmt_ge_sync,
240	.fb_pan_display = wm8505fb_pan_display,
241	.fb_blank = wm8505fb_blank,
242	};
243
244	static int __devinit wm8505fb_probe(struct platform_device *pdev)
245	{
246	struct wm8505fb_info *fbi;
247	struct resource *res;
248	void *addr;
249	struct vt8500fb_platform_data *pdata;
250	int ret;
251
252	pdata = pdev->dev.platform_data;
253
254	ret = -ENOMEM;
255	fbi = NULL;
256
257	fbi = kzalloc(sizeof(struct wm8505fb_info) + sizeof(u32) * 16,
258	GFP_KERNEL);
259	if (!fbi) {
260	dev_err(&pdev->dev, "Failed to initialize framebuffer device\n");
261	ret = -ENOMEM;
262	goto failed;
263	}
264
265	strcpy(fbi->fb.fix.id, DRIVER_NAME);
266
267	fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS;
268	fbi->fb.fix.xpanstep = 1;
269	fbi->fb.fix.ypanstep = 1;
270	fbi->fb.fix.ywrapstep = 0;
271	fbi->fb.fix.accel = FB_ACCEL_NONE;
272
273	fbi->fb.fbops = &wm8505fb_ops;
274	fbi->fb.flags = FBINFO_DEFAULT
275	\| FBINFO_HWACCEL_COPYAREA
276	\| FBINFO_HWACCEL_FILLRECT
277	\| FBINFO_HWACCEL_XPAN
278	\| FBINFO_HWACCEL_YPAN
279	\| FBINFO_VIRTFB
280	\| FBINFO_PARTIAL_PAN_OK;
281	fbi->fb.node = -1;
282
283	addr = fbi;
284	addr = addr + sizeof(struct wm8505fb_info);
285	fbi->fb.pseudo_palette = addr;
286
287	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
288	if (res == NULL) {
289	dev_err(&pdev->dev, "no I/O memory resource defined\n");
290	ret = -ENODEV;
291	goto failed_fbi;
292	}
293
a7f53284	294	res = request_mem_region(res->start, resource_size(res), DRIVER_NAME);
d6ff7d0f AC	295	if (res == NULL) {
	296	dev_err(&pdev->dev, "failed to request I/O memory\n");
	297	ret = -EBUSY;
	298	goto failed_fbi;
	299	}
	300
	301	fbi->regbase = ioremap(res->start, resource_size(res));
	302	if (fbi->regbase == NULL) {
	303	dev_err(&pdev->dev, "failed to map I/O memory\n");
	304	ret = -EBUSY;
	305	goto failed_free_res;
	306	}
	307
	308	fb_videomode_to_var(&fbi->fb.var, &pdata->mode);
	309
	310	fbi->fb.var.nonstd = 0;
	311	fbi->fb.var.activate = FB_ACTIVATE_NOW;
	312
	313	fbi->fb.var.height = -1;
	314	fbi->fb.var.width = -1;
	315	fbi->fb.var.xres_virtual = pdata->xres_virtual;
	316	fbi->fb.var.yres_virtual = pdata->yres_virtual;
	317	fbi->fb.var.bits_per_pixel = pdata->bpp;
	318
	319	fbi->fb.fix.smem_start = pdata->video_mem_phys;
	320	fbi->fb.fix.smem_len = pdata->video_mem_len;
	321	fbi->fb.screen_base = pdata->video_mem_virt;
	322	fbi->fb.screen_size = pdata->video_mem_len;
	323
	324	if (fb_alloc_cmap(&fbi->fb.cmap, 256, 0) < 0) {
	325	dev_err(&pdev->dev, "Failed to allocate color map\n");
	326	ret = -ENOMEM;
	327	goto failed_free_io;
	328	}
	329
	330	wm8505fb_init_hw(&fbi->fb);
	331
	332	fbi->contrast = 0x80;
	333	ret = wm8505fb_set_par(&fbi->fb);
	334	if (ret) {
	335	dev_err(&pdev->dev, "Failed to set parameters\n");
	336	goto failed_free_cmap;
	337	}
	338
	339	platform_set_drvdata(pdev, fbi);
	340
	341	ret = register_framebuffer(&fbi->fb);
	342	if (ret < 0) {
	343	dev_err(&pdev->dev,
	344	"Failed to register framebuffer device: %d\n", ret);
	345	goto failed_free_cmap;
	346	}
	347
	348	ret = device_create_file(&pdev->dev, &dev_attr_contrast);
	349	if (ret < 0) {
	350	printk(KERN_WARNING "fb%d: failed to register attributes (%d)\n",
	351	fbi->fb.node, ret);
	352	}
	353
	354	printk(KERN_INFO "fb%d: %s frame buffer at 0x%lx-0x%lx\n",
	355	fbi->fb.node, fbi->fb.fix.id, fbi->fb.fix.smem_start,
	356	fbi->fb.fix.smem_start + fbi->fb.fix.smem_len - 1);
	357
	358	return 0;
359
360	failed_free_cmap:
361	if (fbi->fb.cmap.len)
362	fb_dealloc_cmap(&fbi->fb.cmap);
363	failed_free_io:
364	iounmap(fbi->regbase);
365	failed_free_res:
366	release_mem_region(res->start, resource_size(res));
367	failed_fbi:
368	platform_set_drvdata(pdev, NULL);
369	kfree(fbi);
370	failed:
371	return ret;
372	}
373
374	static int __devexit wm8505fb_remove(struct platform_device *pdev)
375	{
376	struct wm8505fb_info *fbi = platform_get_drvdata(pdev);
377	struct resource *res;
378
379	device_remove_file(&pdev->dev, &dev_attr_contrast);
380
381	unregister_framebuffer(&fbi->fb);
382
383	writel(0, fbi->regbase);
384
385	if (fbi->fb.cmap.len)
386	fb_dealloc_cmap(&fbi->fb.cmap);
387
388	iounmap(fbi->regbase);
389
390	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
391	release_mem_region(res->start, resource_size(res));
392
393	kfree(fbi);
394
395	return 0;
396	}
397
398	static struct platform_driver wm8505fb_driver = {
399	.probe = wm8505fb_probe,
400	.remove = __devexit_p(wm8505fb_remove),
401	.driver = {
402	.owner = THIS_MODULE,
403	.name = DRIVER_NAME,
404	},
405	};
406
407	static int __init wm8505fb_init(void)
408	{
409	return platform_driver_register(&wm8505fb_driver);
410	}
411
412	static void __exit wm8505fb_exit(void)
413	{
414	platform_driver_unregister(&wm8505fb_driver);
415	}
416
417	module_init(wm8505fb_init);
418	module_exit(wm8505fb_exit);
419
420	MODULE_AUTHOR("Ed Spiridonov <edo.rus@gmail.com>");
421	MODULE_DESCRIPTION("Framebuffer driver for WMT WM8505");
422	MODULE_LICENSE("GPL");