[PATCH] drivers: add LCD support

Add support for auxiliary displays, the ks0108 LCD controller, the
cfag12864b LCD and adds a framebuffer device: cfag12864bfb.

- Add a "auxdisplay/" folder in "drivers/" for auxiliary display
  drivers.

- Add support for the ks0108 LCD Controller as a device driver.  (uses
  parport interface)

- Add support for the cfag12864b LCD as a device driver.  (uses ks0108
  LCD Controller driver)

- Add a framebuffer device called cfag12864bfb.  (uses cfag12864b LCD
  driver)

- Add the usual Documentation, includes, Makefiles, Kconfigs,
  MAINTAINERS, CREDITS...

- Miguel Ojeda will maintain all the stuff above.

[rdunlap@xenotime.net: workqueue fixups]
[akpm@osdl.org: kconfig fix]
Signed-off-by: Miguel Ojeda Sandonis <maxextreme@gmail.com>
Cc: Greg KH <greg@kroah.com>
Acked-by: Paulo Marques <pmarques@grupopie.com>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 180 insertions, 0 deletions

diff --git a/drivers/auxdisplay/cfag12864bfb.c b/drivers/auxdisplay/cfag12864bfb.c
new file mode 100644
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");