aboutsummaryrefslogtreecommitdiffstats
path: root/recipes/linux/linux-2.6.27/boc01/013-090306-lcd.patch
diff options
context:
space:
mode:
Diffstat (limited to 'recipes/linux/linux-2.6.27/boc01/013-090306-lcd.patch')
-rw-r--r--recipes/linux/linux-2.6.27/boc01/013-090306-lcd.patch1090
1 files changed, 1090 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.27/boc01/013-090306-lcd.patch b/recipes/linux/linux-2.6.27/boc01/013-090306-lcd.patch
new file mode 100644
index 0000000000..cc53fe45f7
--- /dev/null
+++ b/recipes/linux/linux-2.6.27/boc01/013-090306-lcd.patch
@@ -0,0 +1,1090 @@
+Index: linux-2.6.27/drivers/video/Kconfig
+===================================================================
+--- linux-2.6.27.orig/drivers/video/Kconfig
++++ linux-2.6.27/drivers/video/Kconfig
+@@ -480,6 +480,28 @@ config FB_ARC
+ 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_NT7506
++ tristate "Novatek 7506 LCD board support"
++ depends on FB
++ select FB_SYS_FILLRECT
++ select FB_SYS_COPYAREA
++ select FB_SYS_IMAGEBLIT
++ select FB_SYS_FOPS
++ select FB_BACKLIGHT
++ select LCD_CLASS_DEVICE
++ help
++ This is the frame buffer device driver for the Novatek 7506 Monochrome/Grayscale LCD board.
++ The board is based on the NT7506 LCD controller.
++
++config FB_NT7506_GRAYSCALE
++ bool "Novatek 7506 Grayscale mode"
++ depends on FB_NT7506
++ default y
++ help
++ This option switches the Monochrome/Grayscale mode for the Novatek 7506 LCD board.
++ Say Y to enable 4-levels Grayscale mode (2 bpp).
++ Say N to enable Monochrome mode (1 bpp).
++
+ config FB_ATARI
+ bool "Atari native chipset support"
+ depends on (FB = y) && ATARI
+Index: linux-2.6.27/drivers/video/Makefile
+===================================================================
+--- linux-2.6.27.orig/drivers/video/Makefile
++++ linux-2.6.27/drivers/video/Makefile
+@@ -31,6 +31,7 @@ obj-$(CONFIG_FB_DEFERRED_IO) += fb_def
+ obj-$(CONFIG_FB_AMIGA) += amifb.o c2p.o
+ obj-$(CONFIG_FB_AM200EPD) += am200epd.o
+ obj-$(CONFIG_FB_ARC) += arcfb.o
++obj-$(CONFIG_FB_NT7506) += nt7506fb.o
+ obj-$(CONFIG_FB_CLPS711X) += clps711xfb.o
+ obj-$(CONFIG_FB_CYBER2000) += cyber2000fb.o
+ obj-$(CONFIG_FB_PM2) += pm2fb.o
+Index: linux-2.6.27/drivers/video/nt7506fb.c
+===================================================================
+--- /dev/null
++++ linux-2.6.27/drivers/video/nt7506fb.c
+@@ -0,0 +1,880 @@
++/*
++ * linux/drivers/video/nt7506fb.c -- FB driver for NT7506 monochrome LCD board
++ *
++ * Copyright (C) 2008, CenoSYS (www.cenosys.com).
++ *
++ * Alexandre Coffignal <alexandre.coffignal@cenosys.com>
++ * Sylvain Giroudon <sylvain.giroudon@goobie.fr>
++ * Jeremy Laine <jeremy.laine@bolloretelecom.eu>
++ *
++ * 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 arcfb.c by Jaya Kumar
++ *
++ * This driver was written to be used with the Novatek NT7506 LCD board.
++ *
++ * Novatek uses a set of NT7506 chips that control individual 128x128 LCD
++ * matrices. The interface between the board and the host is TTL based GPIO.
++ *
++ * 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.
++ *
++ */
++
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/string.h>
++#include <linux/mm.h>
++#include <linux/vmalloc.h>
++#include <linux/delay.h>
++#include <linux/timer.h>
++#include <linux/fb.h>
++#include <linux/init.h>
++#include <linux/platform_device.h>
++#include <linux/backlight.h>
++#include <linux/lcd.h>
++#include <linux/nt7506fb.h>
++
++#include <linux/uaccess.h>
++
++#define DRIVER_NAME "nt7506fb"
++
++//NT7506 Hardware
++#define LCD_RST 0x08
++#define LCD_RSTN 0x00
++#define LCD_BCKLIGH 0x04
++#define LCD_BCKLIGHN 0x00
++#define LCD_RS 0x02
++#define LCD_RSN 0x00
++#define LCD_ERD 0x01
++#define LCD_ERDN 0x00
++
++//Base address
++#define LCD_BASE 0xf0000000
++#define LCD_SIZE 0x2
++
++//NT7506 Instructions
++#define NT_ICON 0xA2
++#define NT_PAGE_ADDR 0xB0
++#define NT_COL_MSB 0x10
++#define NT_COL_LSB 0x00
++#define NT_DISP 0xAE
++#define NT_START_LINE 0x40
++#define NT_COM0 0x44
++#define NT_DUTY 0x48
++#define DUTY_1_128 0x80
++#define NT_REV_DISP 0xA6
++#define NT_POWER 0x28
++#define VC 0x04
++#define VR 0x02
++#define VF 0x01
++#define NT_DCDC 0x64
++#define TIME6 0x03
++#define NT_REG_RES 0x20
++#define RES_7_2 0x07
++#define NT_ELEC_VOL 0x81
++#define NT_BIAS 0x50
++#define BIAS_1_11 0x06
++#define NT_ADC_NOR 0xA0
++#define NT_ADC_REV 0xA1
++#define NT_SHL_NOR 0xC0
++#define NT_SHL_REV 0xC8
++#define NT_SET_PWRSAVE 0xA8
++#define NT_OSC 0xAB
++#define NT_RLS_PWRSAVE 0xE1
++#define NT_RESET 0xE2
++#define NT_DATA_DIR 0xe8
++#define NT_FRC_PWM 0x90
++#define PWM15 0x03
++
++#define ON 0x01
++#define OFF 0x00
++
++#define NT_GRAY_SCALE 0x88
++#define GRAY_WHITE_AB 0
++#define GRAY_WHITE_CD 1
++#define GRAY_LIGHT_AB 2
++#define GRAY_LIGHT_CD 3
++#define GRAY_DARK_AB 4
++#define GRAY_DARK_CD 5
++#define GRAY_BLACK_AB 6
++#define GRAY_BLACK_CD 7
++
++#define GRAY_INDEX_WHITE GRAY_WHITE_AB
++#define GRAY_INDEX_LIGHT GRAY_LIGHT_AB
++#define GRAY_INDEX_DARK GRAY_DARK_AB
++#define GRAY_INDEX_BLACK GRAY_BLACK_AB
++
++#define GRAY_LEVEL_WHITE 0
++#define GRAY_LEVEL_LIGHT 5
++#define GRAY_LEVEL_DARK 10
++#define GRAY_LEVEL_BLACK 15
++#define GRAY_LEVEL_MAX 15
++
++#define GRAY_VALUE(level) (((level)<<4)+(level))
++
++// Geometric settings
++#define LCD_WIDTH 128
++#define LCD_HEIGHT 128
++#define LCD_NPAGES (LCD_HEIGHT/8) /* LCD pages of 8 vertical pixels */
++
++#define DEFAULT_CONTRAST 20
++#define DEFAULT_FPS 10
++
++static struct resource *lcd_mem = NULL;
++static void * _lcd_io = NULL;
++static unsigned long tuhold;
++struct fb_info *info;
++static struct timer_list fb_timer;
++static char _fps = DEFAULT_FPS;
++static char _backlight = 1;
++
++struct nt7506fb_par {
++ atomic_t ref_count;
++ struct fb_info *info;
++ spinlock_t lock;
++ struct lcd_device *lcd_dev;
++ int power;
++ int contrast;
++};
++
++static struct fb_fix_screeninfo nt7506fb_fix __initdata = {
++ .id = DRIVER_NAME,
++ .type = FB_TYPE_PACKED_PIXELS,
++#ifdef CONFIG_FB_NT7506_GRAYSCALE
++ .visual = FB_VISUAL_STATIC_PSEUDOCOLOR,
++ .line_length = LCD_WIDTH / 4,
++#else
++ .visual = FB_VISUAL_MONO01,
++ .line_length = LCD_WIDTH / 8,
++#endif
++ .xpanstep = 1,
++ .ypanstep = 1,
++ .ywrapstep = 0,
++ .accel = FB_ACCEL_NONE,
++};
++
++static struct fb_var_screeninfo nt7506fb_var __initdata = {
++ .xres = LCD_WIDTH,
++ .yres = LCD_HEIGHT,
++ .xres_virtual = LCD_WIDTH,
++ .yres_virtual = LCD_HEIGHT,
++ .nonstd = 1,
++#ifdef CONFIG_FB_NT7506_GRAYSCALE
++ .bits_per_pixel = 2,
++ .grayscale = 1,
++ .red = { 0, 2, 0 },
++ .green = { 0, 2, 0 },
++ .blue = { 0, 2, 0 },
++ .transp = { 0, 0, 0 },
++#else
++ .bits_per_pixel = 1,
++#endif
++};
++
++
++/*
++ * Low-level i/o primitives
++ */
++
++static void NT7506_init_lcd(char ael);
++
++static void NT7506_writeb_ctl(unsigned char value)
++{
++ unsigned short svalue;
++ char bl = _backlight ? LCD_BCKLIGH : LCD_BCKLIGHN;
++
++ svalue=value<<8 | LCD_RSN | LCD_RST | LCD_ERDN | bl;
++ iowrite16(svalue, _lcd_io);
++ udelay(tuhold);
++ //The data on DB0/7 are latched at the falling edge of the E_RD signal
++ svalue=value<<8 | LCD_RSN | LCD_RST | LCD_ERD | bl;
++ iowrite16(svalue, _lcd_io);
++ udelay(tuhold);
++}
++
++static void NT7506_writeb_data(unsigned char value)
++{
++ unsigned short svalue;
++ char bl = _backlight ? LCD_BCKLIGH : LCD_BCKLIGHN;
++
++ svalue=value<<8|LCD_RS |LCD_RST | LCD_ERD | bl ;
++ iowrite16(svalue, _lcd_io);
++ udelay(tuhold);
++ //The data on DB0/7 are latched at the falling edge of the E_RD signal
++ svalue=value<<8|LCD_RS |LCD_RST | LCD_ERDN | bl;
++ iowrite16(svalue, _lcd_io);
++ udelay(tuhold);
++}
++
++static void NT7506_set_start_line(unsigned char y)
++{
++ NT7506_writeb_ctl(NT_START_LINE);
++ NT7506_writeb_ctl(y);
++}
++
++static void NT7506_set_yaddr(unsigned char y)
++{
++ NT7506_writeb_ctl(NT_PAGE_ADDR+y);
++}
++
++static void NT7506_set_xaddr(unsigned char x)
++{
++ NT7506_writeb_ctl(NT_COL_MSB | (x >> 0x04)); //Send high nibble
++ NT7506_writeb_ctl(NT_COL_LSB | (x & 0x0F) ); //Send low nibble
++}
++
++
++/*
++ * LCD device management
++ */
++
++static int
++nt7506fb_lcd_get_contrast(struct lcd_device *lcd_dev)
++{
++ struct nt7506fb_par *par = lcd_get_data(lcd_dev);
++ return par->contrast;
++}
++
++static int
++nt7506fb_lcd_set_contrast(struct lcd_device *lcd_dev, int contrast)
++{
++ struct nt7506fb_par *par = lcd_get_data(lcd_dev);
++
++ par->contrast = contrast;
++ NT7506_writeb_ctl(NT_ELEC_VOL); NT7506_writeb_ctl(par->contrast);
++
++ //printk(KERN_INFO DRIVER_NAME": contrast = %d\n", par->contrast);
++ return 0;
++}
++
++static struct lcd_ops nt7506fb_lcd_ops = {
++ .get_contrast = nt7506fb_lcd_get_contrast,
++ .set_contrast = nt7506fb_lcd_set_contrast,
++};
++
++static void
++nt7506fb_lcd_init(struct nt7506fb_par *par)
++{
++ struct fb_info *info = par->info;
++ struct lcd_device *lcd_dev;
++
++ lcd_dev = lcd_device_register(DRIVER_NAME, info->dev, par, &nt7506fb_lcd_ops);
++ if (IS_ERR(lcd_dev)) {
++ par->lcd_dev = NULL;
++ printk(KERN_WARNING DRIVER_NAME ": LCD device registration failed\n");
++ return;
++ }
++
++ par->lcd_dev = lcd_dev;
++ lcd_dev->props.max_contrast = 255;
++ par->contrast = DEFAULT_CONTRAST;
++ printk(KERN_INFO DRIVER_NAME ": LCD contrast management initialized\n");
++}
++
++static void
++nt7506fb_lcd_exit(struct nt7506fb_par *par)
++{
++ if ( par->lcd_dev ) {
++ lcd_device_unregister(par->lcd_dev);
++ par->lcd_dev = NULL;
++ }
++}
++
++
++/*
++ * Backlight device management
++ */
++static void nt7506fb_start_timer(void);
++
++static int
++nt7506fb_bl_update_status(struct backlight_device *bd)
++{
++ struct nt7506fb_par *par = bl_get_data(bd);
++ int power_on = (bd->props.power != FB_BLANK_POWERDOWN);
++
++ _backlight = bd->props.brightness & power_on;
++
++ printk(KERN_INFO DRIVER_NAME ": backlight=%d power_on=%d\n", _backlight, power_on);
++
++ if ( bd->props.power != par->power ) {
++ par->power = bd->props.power;
++
++ if ( power_on ) {
++ /* Power LCD device on */
++ NT7506_writeb_ctl(NT_SET_PWRSAVE|OFF);
++ NT7506_writeb_ctl(NT_RLS_PWRSAVE);
++
++ /* Restart refresh timer */
++ if ( ! timer_pending(&fb_timer) )
++ nt7506fb_start_timer();
++ }
++ else {
++ /* Throttle refresh timer */
++ del_timer(&fb_timer);
++
++ /* Put LCD device in power save mode */
++ NT7506_writeb_ctl(NT_SET_PWRSAVE|ON);
++ NT7506_writeb_ctl(NT_RLS_PWRSAVE);
++ }
++ }
++
++ //printk(KERN_INFO DRIVER_NAME": backlight = %d\n", _backlight);
++ return 0;
++}
++
++static int
++nt7506fb_bl_get_brightness(struct backlight_device *bd)
++{
++ return bd->props.brightness;
++}
++
++static struct backlight_ops nt7506fb_bl_ops = {
++ .get_brightness = nt7506fb_bl_get_brightness,
++ .update_status = nt7506fb_bl_update_status,
++};
++
++
++static void
++nt7506fb_bl_init(struct nt7506fb_par *par)
++{
++ struct fb_info *info = par->info;
++ struct backlight_device *bd;
++
++ bd = backlight_device_register(DRIVER_NAME, info->dev, par, &nt7506fb_bl_ops);
++ if (IS_ERR(bd)) {
++ info->bl_dev = NULL;
++ printk(KERN_WARNING DRIVER_NAME ": Backlight device registration failed\n");
++ return;
++ }
++
++ info->bl_dev = bd;
++ bd->props.max_brightness = 1;
++ bd->props.power = FB_BLANK_UNBLANK;
++ bd->props.brightness = 1;
++ par->power = bd->props.power;
++
++ nt7506fb_bl_update_status(bd);
++
++ printk(KERN_INFO DRIVER_NAME ": Backlight control initialized\n");
++}
++
++static void
++nt7506fb_bl_exit(struct fb_info *info)
++{
++ if ( info->bl_dev ) {
++ backlight_device_unregister(info->bl_dev);
++ info->bl_dev = NULL;
++ }
++}
++
++
++/*
++ * Main frame buffer operations
++ */
++
++static int nt7506fb_open(struct fb_info *info, int user)
++{
++ struct nt7506fb_par *par = info->par;
++ atomic_inc(&par->ref_count);
++ return 0;
++}
++
++static int nt7506fb_release(struct fb_info *info, int user)
++{
++ struct nt7506fb_par *par = info->par;
++ int count = atomic_read(&par->ref_count);
++ if (!count)
++ return -EINVAL;
++ atomic_dec(&par->ref_count);
++ return 0;
++}
++
++static int nt7506fb_pan_display(struct fb_var_screeninfo *var,
++ struct fb_info *info)
++{
++ if ( (var->vmode & FB_VMODE_YWRAP) &&
++ (var->yoffset < LCD_HEIGHT) &&
++ (info->var.yres <= LCD_HEIGHT) ) {
++ NT7506_set_start_line(var->yoffset);
++ info->var.yoffset = var->yoffset;
++ return 0;
++ }
++
++ return -EINVAL;
++}
++
++static void nt7506fb_lcd_update(struct nt7506fb_par *par)
++{
++ unsigned char *src = (unsigned char __force *) par->info->screen_base;
++ int line_length = par->info->fix.line_length;
++ int page, x, bit;
++ unsigned char plane1, plane2;
++ unsigned char *ptr;
++ unsigned char xshift;
++
++ if ( info->var.bits_per_pixel == 1 ) {
++
++ for (page = 0; page < LCD_NPAGES; page++) {
++ NT7506_set_yaddr(page);
++ NT7506_set_xaddr(0);
++ for (x = 0; x < LCD_WIDTH; x++) {
++ xshift = 7 - (x % 8);
++ plane1 = plane2 = 0;
++ ptr = src + (page * 8 * line_length + x / 8);
++ for (bit = 0; bit < 8; ptr += line_length, bit++) {
++ plane1 |= (((*ptr) >> xshift) & 1) << bit;
++ }
++ NT7506_writeb_data(plane1);
++ NT7506_writeb_data(plane2);
++ }
++ }
++
++ } else {
++
++ for (page = 0; page < LCD_NPAGES; page++) {
++ NT7506_set_yaddr(page);
++ NT7506_set_xaddr(0);
++ for (x = 0; x < LCD_WIDTH; x++) {
++ xshift = (3 - (x % 4)) << 1;
++ plane1 = plane2 = 0;
++ ptr = src + (page * 8 * line_length + x / 4);
++ for (bit = 0; bit < 8; ptr += line_length, bit++) {
++ plane1 |= (((*ptr) >> (xshift + 1)) & 1) << bit;
++ plane2 |= (((*ptr) >> xshift) & 1) << bit;
++ }
++ NT7506_writeb_data(plane1);
++ NT7506_writeb_data(plane2);
++ }
++ }
++
++ }
++}
++
++static void nt7506fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
++{
++ sys_fillrect(info, rect);
++}
++
++
++
++static void nt7506fb_copyarea(struct fb_info *info,
++ const struct fb_copyarea *area)
++{
++ sys_copyarea(info, area);
++}
++
++
++static void nt7506fb_imageblit(struct fb_info *info, const struct fb_image *image)
++{
++ sys_imageblit(info, image);
++}
++
++
++/*
++ * 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 128*8
++ * writes since we update the lcd in each write() anyway.
++ */
++static ssize_t nt7506fb_write(struct fb_info *info, const char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ unsigned long p = *ppos;
++ unsigned int fbmemlength;
++ int err = 0;
++
++ fbmemlength = (info->var.xres * info->var.yres) / (8 / info->var.bits_per_pixel);
++
++ if ( p > fbmemlength ) {
++ return -EFBIG;
++ }
++
++ if ( (count + p) > fbmemlength ) {
++ count = fbmemlength - p;
++ err = -ENOSPC;
++ }
++
++ if ( count ) {
++ char *base_addr = (char __force *) info->screen_base;
++ if ( copy_from_user(base_addr + p, buf, count) )
++ err = -EFAULT;
++ }
++
++ if ( !err )
++ *ppos += count;
++
++ return err ? err : count;
++}
++
++
++static int nt7506fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
++{
++ unsigned long off;
++ unsigned long start;
++ u32 len;
++
++ if (vma->vm_end - vma->vm_start == 0)
++ return 0;
++ if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
++ return -EINVAL;
++ off = vma->vm_pgoff << PAGE_SHIFT;
++ start = info->fix.smem_start;
++ len = info->fix.smem_len;
++ if (off >= len)
++ {
++ return -EINVAL;
++
++ }
++ if ((vma->vm_end - vma->vm_start + off) > len)
++ {
++ return -EINVAL;
++ }
++ off += start;
++ vma->vm_pgoff = off >> PAGE_SHIFT;
++ if (remap_pfn_range(vma, vma->vm_start, virt_to_phys((void *)info->fix.smem_start) >> PAGE_SHIFT,
++ info->fix.smem_len, vma->vm_page_prot))
++
++ {
++ return -EAGAIN;
++ }
++ return 0;
++
++}
++
++
++static int nt7506fb_ioctl(struct fb_info *info,
++ unsigned int cmd, unsigned long arg)
++{
++ unsigned char frame_rate;
++
++ switch ( cmd ) {
++ case FBIO_FRAMERATE:
++ if (get_user(frame_rate, (unsigned char *)arg))
++ return -EFAULT;
++ printk(KERN_INFO "fb%d: framerate=%d Hz\n", info->node, frame_rate);
++ _fps = frame_rate;
++ return 0;
++
++ default:
++ return -EINVAL;
++ }
++}
++
++
++static struct fb_ops nt7506fb_ops = {
++ .owner = THIS_MODULE,
++ .fb_open = nt7506fb_open,
++ .fb_read = fb_sys_read,
++ .fb_write = nt7506fb_write,
++ .fb_release = nt7506fb_release,
++ .fb_pan_display = nt7506fb_pan_display,
++ .fb_fillrect = nt7506fb_fillrect,
++ .fb_copyarea = nt7506fb_copyarea,
++ .fb_imageblit = nt7506fb_imageblit,
++ .fb_ioctl = nt7506fb_ioctl,
++ .fb_mmap = nt7506fb_mmap,
++};
++
++
++static void
++nt7506fb_start_timer(void)
++{
++ fb_timer.expires = jiffies + (HZ/_fps);
++ add_timer(&fb_timer);
++}
++
++static void
++nt7506fb_refresh(unsigned long data)
++{
++ nt7506fb_lcd_update(info->par);
++ nt7506fb_start_timer();
++}
++
++/*
++ * Grayscale levels adjustment
++ */
++
++#ifdef CONFIG_FB_NT7506_GRAYSCALE
++
++static void nt7506fb_set_gray_level(unsigned char index, unsigned char level)
++{
++ NT7506_writeb_ctl(NT_GRAY_SCALE | index);
++ NT7506_writeb_ctl(GRAY_VALUE(level));
++ NT7506_writeb_ctl(NT_GRAY_SCALE | (index+1));
++ NT7506_writeb_ctl(GRAY_VALUE(level));
++}
++
++#ifdef CONFIG_PROC_FS
++#include "nt7506fb-procfs.c"
++#endif
++
++#endif
++
++
++/*
++ * Device driver intialisation
++ */
++
++static int __init
++nt7506fb_probe(struct platform_device *dev)
++{
++ int retval = -ENOMEM;
++ struct nt7506fb_par *par;
++ static unsigned char *videomemory;
++ static int videomemorysize;
++ int i;
++
++ NT7506_init_lcd(DEFAULT_CONTRAST);
++
++ videomemorysize = LCD_WIDTH * LCD_HEIGHT / 4;
++
++ if (!(videomemory = kmalloc(videomemorysize,GFP_ATOMIC)))
++ goto failout;
++ memset(videomemory, 0, videomemorysize);
++
++ info = framebuffer_alloc(sizeof(struct nt7506fb_par), &dev->dev);
++
++ if (!info)
++ goto out_alloc;
++ info->screen_base = (char __iomem *)videomemory;
++ info->fbops = &nt7506fb_ops;
++
++ info->var = nt7506fb_var;
++ info->fix = nt7506fb_fix;
++ info->fix.smem_start = (unsigned long)videomemory;
++ info->fix.smem_len = videomemorysize;
++
++ par = info->par;
++ par->info = info;
++
++ info->flags = FBINFO_FLAG_DEFAULT;
++ spin_lock_init(&par->lock);
++ platform_set_drvdata(dev, info);
++
++#ifdef CONFIG_FB_NT7506_GRAYSCALE
++ /* Allocate cmap */
++ retval = fb_alloc_cmap(&info->cmap, 4, 0);
++ if (retval < 0) {
++ printk(KERN_ERR "fb%d: Failed to allocate colormap\n", info->node);
++ goto out_register;
++ }
++
++ /* Set cmap */
++ for (i = 0; i < 4; i++)
++ info->cmap.red[i] = (((4*i)+1)*(0xFFFF))/16;
++ memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*4);
++ memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*4);
++#endif
++
++ /* Register framebuffer */
++ retval = register_framebuffer(info);
++ if (retval < 0)
++ goto out_register;
++
++ setup_timer(&fb_timer, nt7506fb_refresh, (unsigned long) par);
++
++ printk(KERN_INFO
++ "fb%d: nt7506 frame buffer device, using %dK of video memory\n",
++ info->node, videomemorysize >> 10);
++
++ /* Create procfs entries for grayscale levels adjustment */
++#ifdef CONFIG_PROC_FS
++#ifdef CONFIG_FB_NT7506_GRAYSCALE
++ nt7506fb_proc_init(par);
++#endif
++#endif
++
++ /* Initialize backlight and contrast control (do not abort driver if it fails) */
++ nt7506fb_bl_init(par);
++ nt7506fb_lcd_init(par);
++
++ nt7506fb_start_timer();
++
++ return 0;
++
++out_register:
++ framebuffer_release(info);
++out_alloc:
++ vfree(videomemory);
++failout:
++ return retval;
++}
++
++static int nt7506fb_remove(struct platform_device *dev)
++{
++ struct fb_info *info = platform_get_drvdata(dev);
++
++ del_timer(&fb_timer);
++
++ if (info) {
++ nt7506fb_lcd_exit(info->par);
++ nt7506fb_bl_exit(info);
++ unregister_framebuffer(info);
++ vfree((void __force *)info->screen_base);
++ framebuffer_release(info);
++ }
++ return 0;
++}
++
++#ifdef CONFIG_PM
++static int nt7506fb_suspend(struct platform_device *dev, pm_message_t state)
++{
++ struct fb_info *info = platform_get_drvdata(dev);
++
++ printk(KERN_INFO DRIVER_NAME ": suspend\n");
++
++ info->bl_dev->props.power = FB_BLANK_POWERDOWN;
++ nt7506fb_bl_update_status(info->bl_dev);
++
++ return 0;
++}
++
++static int nt7506fb_resume(struct platform_device *dev)
++{
++ struct fb_info *info = platform_get_drvdata(dev);
++
++ printk(KERN_INFO DRIVER_NAME ": resume\n");
++
++ info->bl_dev->props.power = FB_BLANK_UNBLANK;
++ nt7506fb_bl_update_status(info->bl_dev);
++
++ return 0;
++}
++#else
++#define nt7506fb_suspend NULL
++#define nt7506fb_resume NULL
++#endif
++
++
++static struct platform_driver nt7506fb_driver = {
++ .probe = nt7506fb_probe,
++ .remove = nt7506fb_remove,
++ .suspend = nt7506fb_suspend,
++ .resume = nt7506fb_resume,
++ .driver = {
++ .name = DRIVER_NAME,
++ },
++};
++
++static struct platform_device *nt7506fb_device;
++
++static int __init nt7506fb_init(void)
++{
++ int ret;
++
++
++ if (!(lcd_mem = request_mem_region(LCD_BASE, LCD_SIZE, "mpc8313-lcd")))
++ return -ENOMEM;
++
++ if (!(_lcd_io = ioremap(LCD_BASE, LCD_SIZE)))
++ {
++ release_mem_region(LCD_BASE, LCD_SIZE);
++ lcd_mem = NULL;
++ return -ENOMEM;
++ }
++ ret = platform_driver_register(&nt7506fb_driver);
++
++ if (!ret) {
++ nt7506fb_device = platform_device_alloc(DRIVER_NAME, 0);
++ if (nt7506fb_device)
++ {
++ ret = platform_device_add(nt7506fb_device);
++ }
++ else
++ {
++ ret = -ENOMEM;
++ }
++ if (ret)
++ {
++ platform_device_put(nt7506fb_device);
++ platform_driver_unregister(&nt7506fb_driver);
++ }
++
++ }
++
++
++ return ret;
++
++}
++
++
++static void NT7506_init_lcd(char ael)
++{
++ /* this resets the lcd*/
++ char bl = _backlight ? LCD_BCKLIGH : LCD_BCKLIGHN;
++
++ iowrite16(LCD_RSTN | LCD_ERD | bl, _lcd_io);
++ udelay(100);
++ iowrite16(LCD_RST| LCD_ERD | bl, _lcd_io);
++ udelay(200);
++ /* Soft reset*/
++ NT7506_writeb_ctl(NT_RESET);
++ /* Disable ICON display*/
++ NT7506_writeb_ctl(NT_ICON|OFF);
++ /* Sets the duty ratio 1/128*/
++ NT7506_writeb_ctl(NT_DUTY); NT7506_writeb_ctl(DUTY_1_128);
++ /* Sets reverse direction between RAM column address and segment driver*/
++ NT7506_writeb_ctl(NT_ADC_REV);
++ NT7506_writeb_ctl(NT_SHL_NOR);
++ /* Enales the built in Oscillator circuit.*/
++ NT7506_writeb_ctl(NT_OSC);
++ /* Set Initial row to 0*/
++ NT7506_writeb_ctl(NT_COM0); NT7506_writeb_ctl(0);
++ /* Sets DC-DC*/
++ NT7506_writeb_ctl(NT_DCDC|TIME6);
++ /* Selects resistance ratio of the internal resistor*/
++ NT7506_writeb_ctl(NT_REG_RES|RES_7_2);
++ /* set Reference Voltage mode*/
++ NT7506_writeb_ctl(NT_ELEC_VOL); NT7506_writeb_ctl(ael);
++ /* Selects LCD bias ratio*/
++ NT7506_writeb_ctl(NT_BIAS|BIAS_1_11);
++
++ NT7506_writeb_ctl(NT_DATA_DIR); NT7506_writeb_ctl(0);
++ NT7506_writeb_ctl(NT_FRC_PWM|PWM15);
++
++#ifdef CONFIG_FB_NT7506_GRAYSCALE
++ /* Feed grayscale palette */
++ nt7506fb_set_gray_level(GRAY_INDEX_WHITE, GRAY_LEVEL_WHITE);
++ nt7506fb_set_gray_level(GRAY_INDEX_LIGHT, GRAY_LEVEL_LIGHT);
++ nt7506fb_set_gray_level(GRAY_INDEX_DARK, GRAY_LEVEL_DARK);
++ nt7506fb_set_gray_level(GRAY_INDEX_BLACK, GRAY_LEVEL_BLACK);
++#endif
++
++ /* Select power circuit functions */
++ NT7506_writeb_ctl(NT_POWER|VC);
++ udelay(5000);
++ NT7506_writeb_ctl(NT_POWER|VC|VR);
++ udelay(5000);
++ NT7506_writeb_ctl(NT_POWER|VC|VR|VF);
++ udelay(5000);
++ /* Reverses the display status on LCD panel */
++ NT7506_writeb_ctl(NT_REV_DISP|OFF);
++ /* Forces the whole LCD points to be turned on regardless of the contents of the display data RAM*/
++ NT7506_writeb_ctl(NT_DISP|ON);
++ /* Set Initial Start Line Address */
++ NT7506_writeb_ctl(NT_START_LINE); NT7506_writeb_ctl(0x00);
++}
++
++static void __exit nt7506fb_exit(void)
++{
++ if (lcd_mem)
++ release_mem_region(LCD_BASE, LCD_SIZE);
++ lcd_mem = NULL;
++ platform_device_unregister(nt7506fb_device);
++ platform_driver_unregister(&nt7506fb_driver);
++}
++
++module_param(tuhold, ulong, 0);
++MODULE_PARM_DESC(tuhold, "Time to hold between strobing data to NT7506 board");
++
++module_init(nt7506fb_init);
++module_exit(nt7506fb_exit);
++
++MODULE_DESCRIPTION("fbdev driver for Novatek NT7506 monochrome LCD board");
++MODULE_AUTHOR("Alexandre Coffignal");
++MODULE_LICENSE("GPL");
++
+Index: linux-2.6.27/include/linux/nt7506fb.h
+===================================================================
+--- /dev/null
++++ linux-2.6.27/include/linux/nt7506fb.h
+@@ -0,0 +1,31 @@
++
++/*
++ * (C) Copyright 2008
++ * Alexandre Coffignal, CénoSYS, alexandre.coffignal@cenosys.com
++ *
++ * See file CREDITS for list of people who contributed to this
++ * project.
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License as
++ * published by the Free Software Foundation; either version 2 of
++ * the License, or (at your option) any later version.
++ *
++ * 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
++ *
++ */
++
++#ifndef __LINUX_NT7506FB_H__
++#define __LINUX_NT7506FB_H__
++
++#define FBIO_FRAMERATE _IOR('f', 1, char)
++
++#endif
+Index: linux-2.6.27/drivers/video/nt7506fb-procfs.c
+===================================================================
+--- /dev/null
++++ linux-2.6.27/drivers/video/nt7506fb-procfs.c
+@@ -0,0 +1,119 @@
++/*
++ * FB driver for NT7506 monochrome/grayscale LCD board
++ * Device setup using procfs
++ *
++ * Copyright (C) 2009, Goobie (www.goobie.fr).
++ *
++ * Sylvain Giroudon <sylvain.giroudon@goobie.fr>
++ *
++ * This software program is licensed subject to the GNU General Public License
++ * (GPL).Version 2,June 1991, available at http://www.fsf.org/copyleft/gpl.html
++ */
++
++#include <linux/proc_fs.h>
++#include <linux/uaccess.h>
++
++struct nt7506fb_proc_entry {
++ char *name;
++ unsigned char index;
++ unsigned char level;
++ struct nt7506fb_par *par;
++};
++
++static struct nt7506fb_proc_entry nt7506fb_proc_entries[] = {
++ { "white", GRAY_INDEX_WHITE, GRAY_LEVEL_WHITE },
++ { "light", GRAY_INDEX_LIGHT, GRAY_LEVEL_LIGHT },
++ { "dark", GRAY_INDEX_DARK, GRAY_LEVEL_DARK },
++ { "black", GRAY_INDEX_BLACK, GRAY_LEVEL_BLACK },
++};
++
++static int nt7506fb_proc_read(char *page, char **start, off_t off, int count,
++ int *eof, void *data)
++{
++ struct nt7506fb_proc_entry *entry = data;
++ int len;
++
++ len = sprintf(page, "%d\n", entry->level);
++
++ len -= off;
++ if ( len < count ) {
++ *eof = 1;
++ if ( len <= 0 )
++ return 0;
++ } else {
++ len = count;
++ }
++
++ *start = page + off;
++
++ return len;
++}
++
++
++static int nt7506fb_proc_write(struct file *file, const char *buf,
++ unsigned long count, void *data)
++{
++ struct nt7506fb_proc_entry *entry = data;
++ char lbuf[count+1];
++
++ /* Only root can do this */
++ if ( !capable(CAP_SYS_ADMIN) )
++ return -EACCES;
++
++ memset(lbuf, 0, sizeof(lbuf));
++
++ if (copy_from_user(lbuf, buf, count))
++ return -EFAULT;
++
++ if ( sscanf(lbuf, "%hhi", &entry->level) == 1 ) {
++ if ( entry->level > GRAY_LEVEL_MAX )
++ entry->level = GRAY_LEVEL_MAX;
++
++ /* Set grayscale palette entry */
++ nt7506fb_set_gray_level(entry->index, entry->level);
++ }
++ else {
++ printk(KERN_INFO DRIVER_NAME ": [%s] Syntax error in expression\n", entry->name);
++ return -EINVAL;
++ }
++
++ return count;
++}
++
++
++static int nt7506fb_proc_init(struct nt7506fb_par *par)
++{
++ struct proc_dir_entry *root;
++ struct proc_dir_entry *ent;
++ int i;
++
++ /* Create nt7506fb proc directory */
++ printk(KERN_INFO DRIVER_NAME ": Creating setup entries in /proc/" DRIVER_NAME "/\n");
++
++ root = proc_mkdir(DRIVER_NAME, NULL);
++ if ( root == NULL ) {
++ printk(KERN_WARNING DRIVER_NAME ": Cannot create directory /proc/" DRIVER_NAME "\n");
++ return -1;
++ }
++
++ root->owner = THIS_MODULE;
++
++ /* Create gray level entries */
++ for (i = 0; i < ARRAY_SIZE(nt7506fb_proc_entries); i++) {
++ struct nt7506fb_proc_entry *entry = &nt7506fb_proc_entries[i];
++
++ entry->par = par;
++
++ ent = create_proc_entry(entry->name, S_IFREG|S_IWUSR, root);
++ if ( ent == NULL ) {
++ printk(KERN_WARNING DRIVER_NAME ": Cannot create entry /proc/" DRIVER_NAME "/%s\n", entry->name);
++ return -1;
++ }
++
++ ent->owner = THIS_MODULE;
++ ent->data = entry;
++ ent->write_proc = nt7506fb_proc_write;
++ ent->read_proc = nt7506fb_proc_read;
++ }
++ return 0;
++}
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-19 21:53:55 +0000