[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 000000000000..94765e78315f
--- /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");