3 files changed, 701 insertions, 0 deletions

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 6be8fbec0a0e..04d3120f7236 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -322,6 +322,22 @@ config FB_FM2
           This is the frame buffer device driver for the Amiga FrameMaster
           card from BSC (exhibited 1992 but not shipped as a CBM product).
 
+config FB_ARC
+        tristate "Arc Monochrome LCD board support"
+        depends on FB && X86
+        select FB_CFB_FILLRECT
+        select FB_CFB_COPYAREA
+        select FB_CFB_IMAGEBLIT
+        select FB_SOFT_CURSOR
+        help
+          This enables support for the Arc Monochrome LCD board. The board
+          is based on the KS-108 lcd controller and is typically a matrix
+          of 2*n chips. This driver was tested with a 128x64 panel. This
+          driver supports it for use with x86 SBCs through a 16 bit GPIO
+          interface (8 bit data, 8 bit control). If you anticpate using
+          this driver, say Y or M; otherwise say N. You must specify the
+          GPIO IO address to be used for setting control and data.
+
 config FB_ATARI
         bool "Atari native chipset support"
         depends on (FB = y) && ATARI && BROKEN
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index bd8dc0ffe723..b018df4e95c8 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_FB_MACMODES)      += macmodes.o
 # Hardware specific drivers go first
 obj-$(CONFIG_FB_RETINAZ3)         += retz3fb.o
 obj-$(CONFIG_FB_AMIGA)            += amifb.o c2p.o
+obj-$(CONFIG_FB_ARC)              += arcfb.o
 obj-$(CONFIG_FB_CLPS711X)         += clps711xfb.o
 obj-$(CONFIG_FB_CYBER)            += cyberfb.o
 obj-$(CONFIG_FB_CYBER2000)        += cyber2000fb.o
diff --git a/drivers/video/arcfb.c b/drivers/video/arcfb.c
new file mode 100644
index 000000000000..d28457e0c063
--- /dev/null
+++ b/drivers/video/arcfb.c
@@ -0,0 +1,684 @@
+/*
+ * linux/drivers/video/arcfb.c -- FB driver for Arc monochrome LCD board
+ *
+ * Copyright (C) 2005, Jaya Kumar <jayalk@intworks.biz>
+ * http://www.intworks.biz/arclcd
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
+ *
+ * This driver was written to be used with the Arc LCD board. Arc uses a
+ * set of KS108 chips that control individual 64x64 LCD matrices. The board
+ * can be paneled in a variety of setups such as 2x1=128x64, 4x4=256x256 and
+ * so on. The interface between the board and the host is TTL based GPIO. The
+ * GPIO requirements are 8 writable data lines and 4+n lines for control. On a
+ * GPIO-less system, the board can be tested by connecting the respective sigs
+ * up to a parallel port connector. The driver requires the IO addresses for
+ * data and control GPIO at load time. It is unable to probe for the
+ * existence of the LCD so it must be told at load time whether it should
+ * be enabled or not.
+ *
+ * Todo:
+ * - testing with 4x4
+ * - testing with interrupt hw
+ *
+ * General notes:
+ * - User must set tuhold. It's in microseconds. According to the 108 spec,
+ *   the hold time is supposed to be at least 1 microsecond.
+ * - User must set num_cols=x num_rows=y, eg: x=2 means 128
+ * - User must set arcfb_enable=1 to enable it
+ * - User must set dio_addr=0xIOADDR cio_addr=0xIOADDR
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/arcfb.h>
+
+#include <asm/uaccess.h>
+
+#define floor8(a) (a&(~0x07))
+#define floorXres(a,xres) (a&(~(xres - 1)))
+#define iceil8(a) (((int)((a+7)/8))*8)
+#define ceil64(a) (a|0x3F)
+#define ceilXres(a,xres) (a|(xres - 1))
+
+/* ks108 chipset specific defines and code */
+
+#define KS_SET_DPY_START_LINE   0xC0
+#define KS_SET_PAGE_NUM         0xB8
+#define KS_SET_X                0x40
+#define KS_CEHI                 0x01
+#define KS_CELO                 0x00
+#define KS_SEL_CMD              0x08
+#define KS_SEL_DATA             0x00
+#define KS_DPY_ON               0x3F
+#define KS_DPY_OFF              0x3E
+#define KS_INTACK               0x40
+#define KS_CLRINT               0x02
+
+struct arcfb_par {
+        unsigned long dio_addr;
+        unsigned long cio_addr;
+        unsigned long c2io_addr;
+        atomic_t ref_count;
+        unsigned char cslut[9];
+        struct fb_info *info;
+        unsigned int irq;
+        spinlock_t lock;
+};
+
+static struct fb_fix_screeninfo arcfb_fix __initdata = {
+        .id =           "arcfb",
+        .type =         FB_TYPE_PACKED_PIXELS,
+        .visual =       FB_VISUAL_MONO01,
+        .xpanstep =     0,
+        .ypanstep =     1,
+        .ywrapstep =    0,
+        .accel =        FB_ACCEL_NONE,
+};
+
+static struct fb_var_screeninfo arcfb_var __initdata = {
+        .xres           = 128,
+        .yres           = 64,
+        .xres_virtual   = 128,
+        .yres_virtual   = 64,
+        .bits_per_pixel = 1,
+        .nonstd         = 1,
+};
+
+static unsigned long num_cols;
+static unsigned long num_rows;
+static unsigned long dio_addr;
+static unsigned long cio_addr;
+static unsigned long c2io_addr;
+static unsigned long splashval;
+static unsigned long tuhold;
+static unsigned int nosplash;
+static unsigned int arcfb_enable;
+static unsigned int irq;
+
+static DECLARE_WAIT_QUEUE_HEAD(arcfb_waitq);
+
+static void ks108_writeb_ctl(struct arcfb_par *par,
+                                unsigned int chipindex, unsigned char value)
+{
+        unsigned char chipselval = par->cslut[chipindex];
+
+        outb(chipselval|KS_CEHI|KS_SEL_CMD, par->cio_addr);
+        outb(value, par->dio_addr);
+        udelay(tuhold);
+        outb(chipselval|KS_CELO|KS_SEL_CMD, par->cio_addr);
+}
+
+static void ks108_writeb_mainctl(struct arcfb_par *par, unsigned char value)
+{
+
+        outb(value, par->cio_addr);
+        udelay(tuhold);
+}
+
+static unsigned char ks108_readb_ctl2(struct arcfb_par *par)
+{
+        return inb(par->c2io_addr);
+}
+
+static void ks108_writeb_data(struct arcfb_par *par,
+                                unsigned int chipindex, unsigned char value)
+{
+        unsigned char chipselval = par->cslut[chipindex];
+
+        outb(chipselval|KS_CEHI|KS_SEL_DATA, par->cio_addr);
+        outb(value, par->dio_addr);
+        udelay(tuhold);
+        outb(chipselval|KS_CELO|KS_SEL_DATA, par->cio_addr);
+}
+
+static void ks108_set_start_line(struct arcfb_par *par,
+                                unsigned int chipindex, unsigned char y)
+{
+        ks108_writeb_ctl(par, chipindex, KS_SET_DPY_START_LINE|y);
+}
+
+static void ks108_set_yaddr(struct arcfb_par *par,
+                                unsigned int chipindex, unsigned char y)
+{
+        ks108_writeb_ctl(par, chipindex, KS_SET_PAGE_NUM|y);
+}
+
+static void ks108_set_xaddr(struct arcfb_par *par,
+                                unsigned int chipindex, unsigned char x)
+{
+        ks108_writeb_ctl(par, chipindex, KS_SET_X|x);
+}
+
+static void ks108_clear_lcd(struct arcfb_par *par, unsigned int chipindex)
+{
+        int i,j;
+
+        for (i = 0; i <= 8; i++) {
+                ks108_set_yaddr(par, chipindex, i);
+                ks108_set_xaddr(par, chipindex, 0);
+                for (j = 0; j < 64; j++) {
+                        ks108_writeb_data(par, chipindex,
+                                (unsigned char) splashval);
+                }
+        }
+}
+
+/* main arcfb functions */
+
+static int arcfb_open(struct fb_info *info, int user)
+{
+        struct arcfb_par *par = info->par;
+
+        atomic_inc(&par->ref_count);
+        return 0;
+}
+
+static int arcfb_release(struct fb_info *info, int user)
+{
+        struct arcfb_par *par = info->par;
+        int count = atomic_read(&par->ref_count);
+
+        if (!count)
+                return -EINVAL;
+        atomic_dec(&par->ref_count);
+        return 0;
+}
+
+static int arcfb_pan_display(struct fb_var_screeninfo *var,
+                                struct fb_info *info)
+{
+        int i;
+        struct arcfb_par *par = info->par;
+
+        if ((var->vmode & FB_VMODE_YWRAP) && (var->yoffset < 64)
+                && (info->var.yres <= 64)) {
+                for (i = 0; i < num_cols; i++) {
+                        ks108_set_start_line(par, i, var->yoffset);
+                }
+                info->var.yoffset = var->yoffset;
+                return 0;
+        }
+
+        return -EINVAL;
+}
+
+static irqreturn_t arcfb_interrupt(int vec, void *dev_instance,
+                struct pt_regs *regs)
+{
+        struct fb_info *info = dev_instance;
+        unsigned char ctl2status;
+        struct arcfb_par *par = info->par;
+
+        ctl2status = ks108_readb_ctl2(par);
+
+        if (!(ctl2status & KS_INTACK)) /* not arc generated interrupt */
+                return IRQ_NONE;
+
+        ks108_writeb_mainctl(par, KS_CLRINT);
+
+        spin_lock(&par->lock);
+        if (waitqueue_active(&arcfb_waitq)) {
+                wake_up(&arcfb_waitq);
+        }
+        spin_unlock(&par->lock);
+
+        return IRQ_HANDLED;
+}
+
+/*
+ * here we handle a specific page on the lcd. the complexity comes from
+ * the fact that the fb is laidout in 8xX vertical columns. we extract
+ * each write of 8 vertical pixels. then we shift out as we move along
+ * X. That's what rightshift does. bitmask selects the desired input bit.
+ */
+static void arcfb_lcd_update_page(struct arcfb_par *par, unsigned int upper,
+                unsigned int left, unsigned int right, unsigned int distance)
+{
+        unsigned char *src;
+        unsigned int xindex, yindex, chipindex, linesize;
+        int i, count;
+        unsigned char val;
+        unsigned char bitmask, rightshift;
+
+        xindex = left >> 6;
+        yindex = upper >> 6;
+        chipindex = (xindex + (yindex*num_cols));
+
+        ks108_set_yaddr(par, chipindex, upper/8);
+
+        linesize = par->info->var.xres/8;
+        src = par->info->screen_base + (left/8) + (upper * linesize);
+        ks108_set_xaddr(par, chipindex, left);
+
+        bitmask=1;
+        rightshift=0;
+        while (left <= right) {
+                val = 0;
+                for (i = 0; i < 8; i++) {
+                        if ( i > rightshift) {
+                                val |= (*(src + (i*linesize)) & bitmask)
+                                                << (i - rightshift);
+                        } else {
+                                val |= (*(src + (i*linesize)) & bitmask)
+                                                 >> (rightshift - i);
+                        }
+                }
+                ks108_writeb_data(par, chipindex, val);
+                left++;
+                count++;
+                if (bitmask == 0x80) {
+                        bitmask = 1;
+                        src++;
+                        rightshift=0;
+                } else {
+                        bitmask <<= 1;
+                        rightshift++;
+                }
+        }
+}
+
+/*
+ * here we handle the entire vertical page of the update. we write across
+ * lcd chips. update_page uses the upper/left values to decide which
+ * chip to select for the right. upper is needed for setting the page
+ * desired for the write.
+ */
+static void arcfb_lcd_update_vert(struct arcfb_par *par, unsigned int top,
+                unsigned int bottom, unsigned int left, unsigned int right)
+{
+        unsigned int distance, upper, lower;
+
+        distance = (bottom - top) + 1;
+        upper = top;
+        lower = top + 7;
+
+        while (distance > 0) {
+                distance -= 8;
+                arcfb_lcd_update_page(par, upper, left, right, 8);
+                upper = lower + 1;
+                lower = upper + 7;
+        }
+}
+
+/*
+ * here we handle horizontal blocks for the update. update_vert will
+ * handle spaning multiple pages. we break out each horizontal
+ * block in to individual blocks no taller than 64 pixels.
+ */
+static void arcfb_lcd_update_horiz(struct arcfb_par *par, unsigned int left,
+                        unsigned int right, unsigned int top, unsigned int h)
+{
+        unsigned int distance, upper, lower;
+
+        distance = h;
+        upper = floor8(top);
+        lower = min(upper + distance - 1, ceil64(upper));
+
+        while (distance > 0) {
+                distance -= ((lower - upper) + 1 );
+                arcfb_lcd_update_vert(par, upper, lower, left, right);
+                upper = lower + 1;
+                lower = min(upper + distance - 1, ceil64(upper));
+        }
+}
+
+/*
+ * here we start the process of spliting out the fb update into
+ * individual blocks of pixels. we end up spliting into 64x64 blocks
+ * and finally down to 64x8 pages.
+ */
+static void arcfb_lcd_update(struct arcfb_par *par, unsigned int dx,
+                        unsigned int dy, unsigned int w, unsigned int h)
+{
+        unsigned int left, right, distance, y;
+
+        /* align the request first */
+        y = floor8(dy);
+        h += dy - y;
+        h = iceil8(h);
+
+        distance = w;
+        left = dx;
+        right = min(left + w - 1, ceil64(left));
+
+        while (distance > 0) {
+                arcfb_lcd_update_horiz(par, left, right, y, h);
+                distance -= ((right - left) + 1);
+                left = right + 1;
+                right = min(left + distance - 1, ceil64(left));
+        }
+}
+
+void arcfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+        struct arcfb_par *par = info->par;
+
+        cfb_fillrect(info, rect);
+
+        /* update the physical lcd */
+        arcfb_lcd_update(par, rect->dx, rect->dy, rect->width, rect->height);
+}
+
+void arcfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+        struct arcfb_par *par = info->par;
+
+        cfb_copyarea(info, area);
+
+        /* update the physical lcd */
+        arcfb_lcd_update(par, area->dx, area->dy, area->width, area->height);
+}
+
+void arcfb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+        struct arcfb_par *par = info->par;
+
+        cfb_imageblit(info, image);
+
+        /* update the physical lcd */
+        arcfb_lcd_update(par, image->dx, image->dy, image->width,
+                                image->height);
+}
+
+static int arcfb_ioctl(struct inode *inode, struct file *file,
+                          unsigned int cmd, unsigned long arg,
+                          struct fb_info *info)
+{
+        void __user *argp = (void __user *)arg;
+        struct arcfb_par *par = info->par;
+        unsigned long flags;
+
+        switch (cmd) {
+                case FBIO_WAITEVENT:
+                {
+                        DEFINE_WAIT(wait);
+                        /* illegal to wait on arc if no irq will occur */
+                        if (!par->irq)
+                                return -EINVAL;
+
+                        /* wait until the Arc has generated an interrupt
+                         * which will wake us up */
+                        spin_lock_irqsave(&par->lock, flags);
+                        prepare_to_wait(&arcfb_waitq, &wait,
+                                        TASK_INTERRUPTIBLE);
+                        spin_unlock_irqrestore(&par->lock, flags);
+                        schedule();
+                        finish_wait(&arcfb_waitq, &wait);
+                }
+                case FBIO_GETCONTROL2:
+                {
+                        unsigned char ctl2;
+
+                        ctl2 = ks108_readb_ctl2(info->par);
+                        if (copy_to_user(argp, &ctl2, sizeof(ctl2)))
+                                return -EFAULT;
+                        return 0;
+                }
+                default:
+                        return -EINVAL;
+        }
+}
+
+/*
+ * this is the access path from userspace. they can seek and write to
+ * the fb. it's inefficient for them to do anything less than 64*8
+ * writes since we update the lcd in each write() anyway.
+ */
+static ssize_t arcfb_write(struct file *file, const char *buf, size_t count,
+                                loff_t *ppos)
+{
+        /* modded from epson 1355 */
+
+        struct inode *inode;
+        int fbidx;
+        struct fb_info *info;
+        unsigned long p;
+        int err=-EINVAL;
+        unsigned int fbmemlength,x,y,w,h, bitppos, startpos, endpos, bitcount;
+        struct arcfb_par *par;
+        unsigned int xres;
+
+        p = *ppos;
+        inode = file->f_dentry->d_inode;
+        fbidx = iminor(inode);
+        info = registered_fb[fbidx];
+        par = info->par;
+
+        if (!info || !info->screen_base)
+                return -ENODEV;
+
+        xres = info->var.xres;
+        fbmemlength = (xres * info->var.yres)/8;
+
+        if (p > fbmemlength)
+                return -ENOSPC;
+
+        err = 0;
+        if ((count + p) > fbmemlength) {
+                count = fbmemlength - p;
+                err = -ENOSPC;
+        }
+
+        if (count) {
+                char *base_addr;
+
+                base_addr = info->screen_base;
+                count -= copy_from_user(base_addr + p, buf, count);
+                *ppos += count;
+                err = -EFAULT;
+        }
+
+
+        bitppos = p*8;
+        startpos = floorXres(bitppos, xres);
+        endpos = ceilXres((bitppos + (count*8)), xres);
+        bitcount = endpos - startpos;
+
+        x = startpos % xres;
+        y = startpos / xres;
+        w = xres;
+        h = bitcount / xres;
+        arcfb_lcd_update(par, x, y, w, h);
+
+        if (count)
+                return count;
+        return err;
+}
+
+static void arcfb_platform_release(struct device *device)
+{
+}
+
+static struct fb_ops arcfb_ops = {
+        .owner          = THIS_MODULE,
+        .fb_open        = arcfb_open,
+        .fb_write       = arcfb_write,
+        .fb_release     = arcfb_release,
+        .fb_pan_display = arcfb_pan_display,
+        .fb_fillrect    = arcfb_fillrect,
+        .fb_copyarea    = arcfb_copyarea,
+        .fb_imageblit   = arcfb_imageblit,
+        .fb_cursor      = soft_cursor,
+        .fb_ioctl       = arcfb_ioctl,
+};
+
+static int __init arcfb_probe(struct device *device)
+{
+        struct platform_device *dev = to_platform_device(device);
+        struct fb_info *info;
+        int retval = -ENOMEM;
+        int videomemorysize;
+        unsigned char *videomemory;
+        struct arcfb_par *par;
+        int i;
+
+        videomemorysize = (((64*64)*num_cols)*num_rows)/8;
+
+        /* We need a flat backing store for the Arc's
+           less-flat actual paged framebuffer */
+        if (!(videomemory = vmalloc(videomemorysize)))
+                return retval;
+
+        memset(videomemory, 0, videomemorysize);
+
+        info = framebuffer_alloc(sizeof(struct arcfb_par), &dev->dev);
+        if (!info)
+                goto err;
+
+        info->screen_base = (char __iomem *)videomemory;
+        info->fbops = &arcfb_ops;
+
+        info->var = arcfb_var;
+        info->fix = arcfb_fix;
+        par = info->par;
+        par->info = info;
+
+        if (!dio_addr || !cio_addr || !c2io_addr) {
+                printk(KERN_WARNING "no IO addresses supplied\n");
+                goto err1;
+        }
+        par->dio_addr = dio_addr;
+        par->cio_addr = cio_addr;
+        par->c2io_addr = c2io_addr;
+        par->cslut[0] = 0x00;
+        par->cslut[1] = 0x06;
+        info->flags = FBINFO_FLAG_DEFAULT;
+        spin_lock_init(&par->lock);
+        retval = register_framebuffer(info);
+        if (retval < 0)
+                goto err1;
+        dev_set_drvdata(&dev->dev, info);
+        if (irq) {
+                par->irq = irq;
+                if (request_irq(par->irq, &arcfb_interrupt, SA_SHIRQ,
+                                "arcfb", info)) {
+                        printk(KERN_INFO
+                                "arcfb: Failed req IRQ %d\n", par->irq);
+                        goto err1;
+                }
+        }
+        printk(KERN_INFO
+               "fb%d: Arc frame buffer device, using %dK of video memory\n",
+               info->node, videomemorysize >> 10);
+
+        /* this inits the lcd but doesn't clear dirty pixels */
+        for (i = 0; i < num_cols * num_rows; i++) {
+                ks108_writeb_ctl(par, i, KS_DPY_OFF);
+                ks108_set_start_line(par, i, 0);
+                ks108_set_yaddr(par, i, 0);
+                ks108_set_xaddr(par, i, 0);
+                ks108_writeb_ctl(par, i, KS_DPY_ON);
+        }
+
+        /* if we were told to splash the screen, we just clear it */
+        if (!nosplash) {
+                for (i = 0; i < num_cols * num_rows; i++) {
+                        printk(KERN_INFO "fb%d: splashing lcd %d\n",
+                                info->node, i);
+                        ks108_set_start_line(par, i, 0);
+                        ks108_clear_lcd(par, i);
+                }
+        }
+
+        return 0;
+err1:
+        framebuffer_release(info);
+err:
+        vfree(videomemory);
+        return retval;
+}
+
+static int arcfb_remove(struct device *device)
+{
+        struct fb_info *info = dev_get_drvdata(device);
+
+        if (info) {
+                unregister_framebuffer(info);
+                vfree(info->screen_base);
+                framebuffer_release(info);
+        }
+        return 0;
+}
+
+static struct device_driver arcfb_driver = {
+        .name   = "arcfb",
+        .bus    = &platform_bus_type,
+        .probe  = arcfb_probe,
+        .remove = arcfb_remove,
+};
+
+static struct platform_device arcfb_device = {
+        .name   = "arcfb",
+        .id     = 0,
+        .dev    = {
+                .release = arcfb_platform_release,
+        }
+};
+
+static int __init arcfb_init(void)
+{
+        int ret;
+
+        if (!arcfb_enable)
+                return -ENXIO;
+
+        ret = driver_register(&arcfb_driver);
+        if (!ret) {
+                ret = platform_device_register(&arcfb_device);
+                if (ret)
+                        driver_unregister(&arcfb_driver);
+        }
+        return ret;
+
+}
+
+static void __exit arcfb_exit(void)
+{
+        platform_device_unregister(&arcfb_device);
+        driver_unregister(&arcfb_driver);
+}
+
+module_param(num_cols, ulong, 0);
+MODULE_PARM_DESC(num_cols, "Num horiz panels, eg: 2 = 128 bit wide");
+module_param(num_rows, ulong, 0);
+MODULE_PARM_DESC(num_rows, "Num vert panels, eg: 1 = 64 bit high");
+module_param(nosplash, uint, 0);
+MODULE_PARM_DESC(nosplash, "Disable doing the splash screen");
+module_param(arcfb_enable, uint, 0);
+MODULE_PARM_DESC(arcfb_enable, "Enable communication with Arc board");
+module_param(dio_addr, ulong, 0);
+MODULE_PARM_DESC(dio_addr, "IO address for data, eg: 0x480");
+module_param(cio_addr, ulong, 0);
+MODULE_PARM_DESC(cio_addr, "IO address for control, eg: 0x400");
+module_param(c2io_addr, ulong, 0);
+MODULE_PARM_DESC(c2io_addr, "IO address for secondary control, eg: 0x408");
+module_param(splashval, ulong, 0);
+MODULE_PARM_DESC(splashval, "Splash pattern: 0xFF is black, 0x00 is green");
+module_param(tuhold, ulong, 0);
+MODULE_PARM_DESC(tuhold, "Time to hold between strobing data to Arc board");
+module_param(irq, uint, 0);
+MODULE_PARM_DESC(irq, "IRQ for the Arc board");
+
+module_init(arcfb_init);
+module_exit(arcfb_exit);
+
+MODULE_DESCRIPTION("fbdev driver for Arc monochrome LCD board");
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");
+