[PATCH] drivers: add LCD support

[mv-sheeva.git] / drivers / auxdisplay / cfag12864bfb.c

diff --git a/drivers/auxdisplay/cfag12864bfb.c b/drivers/auxdisplay/cfag12864bfb.c
new file mode 100644 (file)
index 0000000..94765e7
--- /dev/null
+++ b/drivers/auxdisplay/cfag12864bfb.c
@@ -0,0 +1,180 @@
+/*
+ *    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_fillrect = cfb_fillrect,
+       .fb_copyarea = cfb_copyarea,
+       .fb_imageblit = cfb_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;
+
+       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);
+               }
+       }
+
+       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");