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/*

 *    Filename: cfag12864bfb.c

 *     Version: 0.1.0

 * Description: cfag12864b LCD framebuffer driver

 *     License: GPLv2

 *     Depends: cfag12864b

 *

 *      Author: Copyright (C) Miguel Ojeda Sandonis <maxextreme@gmail.com>

 *        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/slab.h>

#include <linux/string.h>

#include <linux/uaccess.h>

#include <linux/cfag12864b.h>

#define CFAG12864BFB_NAME "cfag12864bfb"

static struct fb_fix_screeninfo cfag12864bfb_fix __initdata = {

        .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 __initdata = {

        .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 __init 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);

        printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,

                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 <maxextreme@gmail.com>");

MODULE_DESCRIPTION("cfag12864b LCD framebuffer driver");