[mirror_ubuntu-zesty-kernel.git] / drivers / auxdisplay / cfag12864bfb.c

/*
 *    Filename: cfag12864bfb.c
 *     Version: 0.1.0
 * Description: cfag12864b LCD framebuffer driver
 *     License: GPLv2
 *     Depends: cfag12864b
 *
 *      Author: Copyright (C) Miguel Ojeda Sandonis
 *        Date: 2006-10-31
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/mm.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/cfag12864b.h>

#define CFAG12864BFB_NAME "cfag12864bfb"

static struct fb_fix_screeninfo cfag12864bfb_fix = {
	.id = "cfag12864b",
	.type = FB_TYPE_PACKED_PIXELS,
	.visual = FB_VISUAL_MONO10,
	.xpanstep = 0,
	.ypanstep = 0,
	.ywrapstep = 0,
	.line_length = CFAG12864B_WIDTH / 8,
	.accel = FB_ACCEL_NONE,
};

static struct fb_var_screeninfo cfag12864bfb_var = {
	.xres = CFAG12864B_WIDTH,
	.yres = CFAG12864B_HEIGHT,
	.xres_virtual = CFAG12864B_WIDTH,
	.yres_virtual = CFAG12864B_HEIGHT,
	.bits_per_pixel = 1,
	.red = { 0, 1, 0 },
      	.green = { 0, 1, 0 },
      	.blue = { 0, 1, 0 },
	.left_margin = 0,
	.right_margin = 0,
	.upper_margin = 0,
	.lower_margin = 0,
	.vmode = FB_VMODE_NONINTERLACED,
};

static int cfag12864bfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
	return vm_insert_page(vma, vma->vm_start,
		virt_to_page(cfag12864b_buffer));
}

static struct fb_ops cfag12864bfb_ops = {
	.owner = THIS_MODULE,
	.fb_read = fb_sys_read,
	.fb_write = fb_sys_write,
	.fb_fillrect = sys_fillrect,
	.fb_copyarea = sys_copyarea,
	.fb_imageblit = sys_imageblit,
	.fb_mmap = cfag12864bfb_mmap,
};

static int cfag12864bfb_probe(struct platform_device *device)
{
	int ret = -EINVAL;
 	struct fb_info *info = framebuffer_alloc(0, &device->dev);

	if (!info)
		goto none;

	info->screen_base = (char __iomem *) cfag12864b_buffer;
	info->screen_size = CFAG12864B_SIZE;
	info->fbops = &cfag12864bfb_ops;
	info->fix = cfag12864bfb_fix;
	info->var = cfag12864bfb_var;
	info->pseudo_palette = NULL;
	info->par = NULL;
	info->flags = FBINFO_FLAG_DEFAULT;

	if (register_framebuffer(info) < 0)
		goto fballoced;

	platform_set_drvdata(device, info);

	fb_info(info, "%s frame buffer device\n", info->fix.id);

	return 0;

fballoced:
	framebuffer_release(info);

none:
	return ret;
}

static int cfag12864bfb_remove(struct platform_device *device)
{
	struct fb_info *info = platform_get_drvdata(device);

	if (info) {
		unregister_framebuffer(info);
		framebuffer_release(info);
	}

	return 0;
}

static struct platform_driver cfag12864bfb_driver = {
	.probe	= cfag12864bfb_probe,
	.remove = cfag12864bfb_remove,
	.driver = {
		.name	= CFAG12864BFB_NAME,
	},
};

static struct platform_device *cfag12864bfb_device;

static int __init cfag12864bfb_init(void)
{
	int ret = -EINVAL;

	/* cfag12864b_init() must be called first */
	if (!cfag12864b_isinited()) {
		printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
			"cfag12864b is not initialized\n");
		goto none;
	}

	if (cfag12864b_enable()) {
		printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
			"can't enable cfag12864b refreshing (being used)\n");
		return -ENODEV;
	}

	ret = platform_driver_register(&cfag12864bfb_driver);

	if (!ret) {
		cfag12864bfb_device =
			platform_device_alloc(CFAG12864BFB_NAME, 0);

		if (cfag12864bfb_device)
			ret = platform_device_add(cfag12864bfb_device);
		else
			ret = -ENOMEM;

		if (ret) {
			platform_device_put(cfag12864bfb_device);
			platform_driver_unregister(&cfag12864bfb_driver);
		}
	}

none:
	return ret;
}

static void __exit cfag12864bfb_exit(void)
{
	platform_device_unregister(cfag12864bfb_device);
	platform_driver_unregister(&cfag12864bfb_driver);
	cfag12864b_disable();
}

module_init(cfag12864bfb_init);
module_exit(cfag12864bfb_exit);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>");
MODULE_DESCRIPTION("cfag12864b LCD framebuffer driver");
Commit	Line	Data
70e84049 MOS	1	/*
	2	* Filename: cfag12864bfb.c
	3	* Version: 0.1.0
	4	* Description: cfag12864b LCD framebuffer driver
	5	* License: GPLv2
	6	* Depends: cfag12864b
	7	*
450c622e	8	* Author: Copyright (C) Miguel Ojeda Sandonis
70e84049 MOS	9	* Date: 2006-10-31
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	23	*
	24	*/
	25
	26	#include <linux/init.h>
	27	#include <linux/module.h>
	28	#include <linux/kernel.h>
	29	#include <linux/delay.h>
	30	#include <linux/errno.h>
	31	#include <linux/fb.h>
	32	#include <linux/mm.h>
	33	#include <linux/platform_device.h>
70e84049 MOS	34	#include <linux/string.h>
	35	#include <linux/uaccess.h>
	36	#include <linux/cfag12864b.h>
	37
	38	#define CFAG12864BFB_NAME "cfag12864bfb"
	39
0fe763c5	40	static struct fb_fix_screeninfo cfag12864bfb_fix = {
70e84049 MOS	41	.id = "cfag12864b",
	42	.type = FB_TYPE_PACKED_PIXELS,
	43	.visual = FB_VISUAL_MONO10,
	44	.xpanstep = 0,
	45	.ypanstep = 0,
	46	.ywrapstep = 0,
	47	.line_length = CFAG12864B_WIDTH / 8,
	48	.accel = FB_ACCEL_NONE,
	49	};
	50
0fe763c5	51	static struct fb_var_screeninfo cfag12864bfb_var = {
70e84049 MOS	52	.xres = CFAG12864B_WIDTH,
	53	.yres = CFAG12864B_HEIGHT,
	54	.xres_virtual = CFAG12864B_WIDTH,
	55	.yres_virtual = CFAG12864B_HEIGHT,
	56	.bits_per_pixel = 1,
	57	.red = { 0, 1, 0 },
	58	.green = { 0, 1, 0 },
	59	.blue = { 0, 1, 0 },
	60	.left_margin = 0,
	61	.right_margin = 0,
	62	.upper_margin = 0,
	63	.lower_margin = 0,
	64	.vmode = FB_VMODE_NONINTERLACED,
	65	};
	66
	67	static int cfag12864bfb_mmap(struct fb_info info, struct vm_area_struct vma)
	68	{
	69	return vm_insert_page(vma, vma->vm_start,
	70	virt_to_page(cfag12864b_buffer));
	71	}
	72
	73	static struct fb_ops cfag12864bfb_ops = {
	74	.owner = THIS_MODULE,
bfeeffbb AO	75	.fb_read = fb_sys_read,
	76	.fb_write = fb_sys_write,
	77	.fb_fillrect = sys_fillrect,
	78	.fb_copyarea = sys_copyarea,
	79	.fb_imageblit = sys_imageblit,
70e84049 MOS	80	.fb_mmap = cfag12864bfb_mmap,
	81	};
	82
0fe763c5	83	static int cfag12864bfb_probe(struct platform_device *device)
70e84049 MOS	84	{
	85	int ret = -EINVAL;
	86	struct fb_info *info = framebuffer_alloc(0, &device->dev);
	87
	88	if (!info)
	89	goto none;
	90
	91	info->screen_base = (char __iomem *) cfag12864b_buffer;
	92	info->screen_size = CFAG12864B_SIZE;
	93	info->fbops = &cfag12864bfb_ops;
	94	info->fix = cfag12864bfb_fix;
	95	info->var = cfag12864bfb_var;
	96	info->pseudo_palette = NULL;
	97	info->par = NULL;
	98	info->flags = FBINFO_FLAG_DEFAULT;
	99
	100	if (register_framebuffer(info) < 0)
	101	goto fballoced;
	102
	103	platform_set_drvdata(device, info);
	104
31b6780c	105	fb_info(info, "%s frame buffer device\n", info->fix.id);
70e84049 MOS	106
	107	return 0;
	108
	109	fballoced:
	110	framebuffer_release(info);
	111
	112	none:
	113	return ret;
	114	}
	115
0fe763c5	116	static int cfag12864bfb_remove(struct platform_device *device)
70e84049 MOS	117	{
	118	struct fb_info *info = platform_get_drvdata(device);
	119
	120	if (info) {
	121	unregister_framebuffer(info);
	122	framebuffer_release(info);
	123	}
	124
	125	return 0;
	126	}
	127
	128	static struct platform_driver cfag12864bfb_driver = {
	129	.probe = cfag12864bfb_probe,
0fe763c5	130	.remove = cfag12864bfb_remove,
70e84049 MOS	131	.driver = {
	132	.name = CFAG12864BFB_NAME,
	133	},
	134	};
	135
	136	static struct platform_device *cfag12864bfb_device;
	137
	138	static int __init cfag12864bfb_init(void)
	139	{
34173a4a MO	140	int ret = -EINVAL;
	141
	142	/* cfag12864b_init() must be called first */
	143	if (!cfag12864b_isinited()) {
	144	printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
	145	"cfag12864b is not initialized\n");
	146	goto none;
	147	}
70e84049 MOS	148
	149	if (cfag12864b_enable()) {
	150	printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
	151	"can't enable cfag12864b refreshing (being used)\n");
	152	return -ENODEV;
	153	}
	154
	155	ret = platform_driver_register(&cfag12864bfb_driver);
	156
	157	if (!ret) {
	158	cfag12864bfb_device =
	159	platform_device_alloc(CFAG12864BFB_NAME, 0);
	160
	161	if (cfag12864bfb_device)
	162	ret = platform_device_add(cfag12864bfb_device);
	163	else
	164	ret = -ENOMEM;
	165
	166	if (ret) {
	167	platform_device_put(cfag12864bfb_device);
	168	platform_driver_unregister(&cfag12864bfb_driver);
	169	}
	170	}
	171
34173a4a	172	none:
70e84049 MOS	173	return ret;
	174	}
	175
	176	static void __exit cfag12864bfb_exit(void)
	177	{
	178	platform_device_unregister(cfag12864bfb_device);
	179	platform_driver_unregister(&cfag12864bfb_driver);
	180	cfag12864b_disable();
	181	}
	182
	183	module_init(cfag12864bfb_init);
	184	module_exit(cfag12864bfb_exit);
	185
	186	MODULE_LICENSE("GPL v2");
450c622e	187	MODULE_AUTHOR("Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>");
70e84049	188	MODULE_DESCRIPTION("cfag12864b LCD framebuffer driver");