Index: linux-2.6.26/drivers/video/Kconfig =================================================================== --- linux-2.6.26.orig/drivers/video/Kconfig 2008-07-13 23:51:29.000000000 +0200 +++ linux-2.6.26/drivers/video/Kconfig 2008-12-09 10:01:14.000000000 +0100 @@ -480,6 +480,17 @@ 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_NOVA + tristate "Nova 7506 Monochrome LCD board support" + depends on FB + select FB_SYS_FILLRECT + select FB_SYS_COPYAREA + select FB_SYS_IMAGEBLIT + select FB_SYS_FOPS + help + This enables support for the Nova 7506 Monochrome LCD board. The board + is based on the NT7506 lcd controller. + config FB_ATARI bool "Atari native chipset support" depends on (FB = y) && ATARI Index: linux-2.6.26/drivers/video/Makefile =================================================================== --- linux-2.6.26.orig/drivers/video/Makefile 2008-07-13 23:51:29.000000000 +0200 +++ linux-2.6.26/drivers/video/Makefile 2008-12-09 10:01:14.000000000 +0100 @@ -13,8 +13,8 @@ obj-$(CONFIG_VT) += console/ obj-$(CONFIG_LOGO) += logo/ -obj-y += backlight/ display/ - +obj-y += backlight/ display/ +obj-$(CONFIG_FB_NOVA) += N7506fb.o obj-$(CONFIG_FB_CFB_FILLRECT) += cfbfillrect.o obj-$(CONFIG_FB_CFB_COPYAREA) += cfbcopyarea.o obj-$(CONFIG_FB_CFB_IMAGEBLIT) += cfbimgblt.o Index: linux-2.6.26/drivers/video/N7506fb.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6.26/drivers/video/N7506fb.c 2008-12-09 10:03:34.000000000 +0100 @@ -0,0 +1,631 @@ +/* + * linux/drivers/video/N7506fb.c -- FB driver for Nova NT7506 monochrome LCD board + * + * Copyright (C) 2008, Alexandre Coffignal + * + * 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 Nova 7506 LCD board. + * + * + * + * + * Nova 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define floor8(a) (a&(~0x07)) +#define floorXres(a,xres) (a&(~(xres - 1))) +#define iceil8(a) (((int)((a+7)/8))*8) +#define ceil128(a) (a|0x7F) +#define ceilXres(a,xres) (a|(xres - 1)) + +//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 + +#define CONTRASTE 0xF +#define FRAME_PER_SECOND 5 + +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 _refresh; +static char _fps =FRAME_PER_SECOND; +static char _backlight=1; + +struct novafb_par { + atomic_t ref_count; + unsigned char cslut[9]; + struct fb_info *info; + unsigned int irq; + spinlock_t lock; +}; + +static struct fb_fix_screeninfo novafb_fix __initdata = { + .id = "novafb", + .type = FB_TYPE_PACKED_PIXELS, + .visual = FB_VISUAL_MONO01, + .xpanstep = 1, + .ypanstep = 1, + .ywrapstep = 0, + .line_length=16, + .accel = FB_ACCEL_NONE, +}; + +static struct fb_var_screeninfo novafb_var __initdata = { + .xres = 128, + .yres = 128, + .xres_virtual = 128, + .yres_virtual = 128, + .bits_per_pixel = 1, + .nonstd = 1, +}; + + +static void NT7506_init_lcd(char ael); + +static void NT7506_writeb_ctl(unsigned char value,char backlight) +{ + unsigned short svalue; + char bl; + if(backlight) + bl=LCD_BCKLIGH; + else + bl=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,char backlight) +{ + unsigned short svalue; + char bl; + if(backlight) + bl=LCD_BCKLIGH; + else + bl=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,_backlight); + NT7506_writeb_ctl(y,_backlight); +} + +static void NT7506_set_yaddr(unsigned char y) +{ + NT7506_writeb_ctl(NT_PAGE_ADDR+y,_backlight); +} + +static void NT7506_set_xaddr(unsigned char x) +{ + NT7506_writeb_ctl(NT_COL_MSB | (x >> 0x04),_backlight); //Send high nibble + NT7506_writeb_ctl(NT_COL_LSB | (x & 0x0F) ,_backlight); //Send low nibble +} + +/* main novafb functions */ + +static int novafb_open(struct fb_info *info, int user) +{ + struct novafb_par *par = info->par; + atomic_inc(&par->ref_count); + return 0; +} + +static int novafb_release(struct fb_info *info, int user) +{ + struct novafb_par *par = info->par; + int count = atomic_read(&par->ref_count); + if (!count) + return -EINVAL; + atomic_dec(&par->ref_count); + return 0; +} + +static int novafb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + if ((var->vmode & FB_VMODE_YWRAP) && (var->yoffset < 128) + && (info->var.yres <= 128)) + { + NT7506_set_start_line(var->yoffset); + info->var.yoffset = var->yoffset; + return 0; + } + + return -EINVAL; +} + +static void novafb_lcd_update(struct novafb_par *par, unsigned int dx, + unsigned int dy, unsigned int w, unsigned int h) +{ + int bit,x,y,xfb,yfb,width,height,i; + char mask=0; + char dest[2048]; + char * src; + char value; + src = (unsigned char __force *) par->info->screen_base; + for(i=0;i<2048;i++) + { + dest[i]=0; + } + for(x=0;x<128/*(width)*/;x++) + { + for(y=0;y<16/*height/8*/;y++) + { + xfb=x/8; + yfb=y*8; + + for(bit=0;bit<8;yfb++,bit++) + { + mask = (1<<(7-(x%8))); + if(((src[yfb*16+xfb]&mask))) + value=1; + else + value=0; + + dest[y*128+x]+= (value<par; + + int xfb,yfb,i=0; + char * src = (unsigned char __force *) par->info->screen_base; + + for(yfb=image->dy;yfb<(image->height+image->dy);yfb++) + { + for(xfb=(image->dx)/8;xfb<(image->dx+image->width)/8;xfb++) + { + src[yfb*16+xfb]=image->data[i++]; + } + } + +} + +/* + * 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 novafb_write(struct fb_info *info, const char __user *buf, + size_t count, loff_t *ppos) +{ + unsigned long p; + int err=-EINVAL; + unsigned int fbmemlength ; + struct novafb_par *par; + unsigned int xres; + p = *ppos; + par = info->par; + 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 = (char __force *)info->screen_base; + count -= copy_from_user(base_addr + p, buf, count); + *ppos += count; + err = -EFAULT; + } + if (count) + { + return count; + } + return err; +} + +static int novafb_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 novafb_ioctl(struct fb_info *info, + unsigned int cmd, unsigned long arg) +{ + unsigned char contrast; + unsigned char frame_rate; + unsigned char backlight; + switch (cmd) + { + case FBIO_FRAMERATE: + { + + if (get_user(frame_rate, (unsigned char *)arg)) + return -EFAULT; + printk(KERN_INFO "fb0: framerate=%d Hz\n",frame_rate); + _fps=frame_rate; + return 0; + } + case FBIO_CONTRAST: + { + _refresh=0; + if (get_user(contrast, (unsigned char *)arg)) + return -EFAULT; + printk(KERN_INFO "fb0: contrast=%d\n",contrast); + NT7506_writeb_ctl(NT_ELEC_VOL,_backlight); NT7506_writeb_ctl(contrast,_backlight); + _refresh=1; + return 0; + } + case FBIO_BACKLIGHT: + { + _refresh=0; + if (get_user(backlight, (unsigned char *)arg)) + return -EFAULT; + if(backlight) + { + printk(KERN_INFO "fb0: Backlight ON\n"); + _backlight=1; + } + else + { + printk(KERN_INFO "fb0: Backlight OFF\n"); + _backlight=0; + } + _refresh=1; + return 0; + + } + + + default: + return -EINVAL; + } + +} + +static struct fb_ops novafb_ops = { + .owner = THIS_MODULE, + .fb_open = novafb_open, + .fb_read = fb_sys_read, + .fb_write = novafb_write, + .fb_release = novafb_release, + .fb_pan_display = novafb_pan_display, + .fb_fillrect = novafb_fillrect, + .fb_copyarea = novafb_copyarea, + .fb_imageblit = novafb_imageblit, + .fb_ioctl = novafb_ioctl, + .fb_mmap =novafb_mmap, +}; + + +static void +novafb_refresh(int ignore_me ) +{ + struct novafb_par *par = info->par; + if(_refresh) + { + novafb_lcd_update(par, 0, 0, 128,128); + fb_timer.expires = jiffies + (HZ/_fps); + add_timer(&fb_timer); + } + else + { + fb_timer.expires = jiffies + (HZ/_fps); + add_timer(&fb_timer); + } +} + +static int +__init novafb_probe(struct platform_device *dev) +{ + + int retval = -ENOMEM; + char * src; + int i; + + struct novafb_par *par; + static unsigned char *videomemory; + static int videomemorysize; + + NT7506_init_lcd(CONTRASTE); + + videomemorysize = (128*128/8)*2; + + if (!(videomemory = kmalloc(videomemorysize,GFP_ATOMIC))) + return retval; + memset(videomemory, 0, videomemorysize); + + info = framebuffer_alloc(sizeof(struct novafb_par), &dev->dev); + + if (!info) + goto err; + info->screen_base = (char __iomem *)videomemory; + info->fbops = &novafb_ops; + + info->var = novafb_var; + info->fix = novafb_fix; + info->fix.smem_start=(unsigned long)videomemory; + info->fix.smem_len = videomemorysize; + + par = info->par; + par->info = info; + par->cslut[0] = 0x00; + par->cslut[1] = 0x06; + src = (unsigned char __force *) par->info->screen_base; + for(i=0;iflags = FBINFO_FLAG_DEFAULT; + spin_lock_init(&par->lock); + platform_set_drvdata(dev, info); + retval = register_framebuffer(info); + if (retval < 0) + goto err1; + + init_timer(&fb_timer); + fb_timer.function = novafb_refresh; + fb_timer.expires = jiffies + (HZ / _fps); + add_timer(&fb_timer); + + printk(KERN_INFO + "fb%d: nova frame buffer device, using %dK of video memory\n", + info->node, videomemorysize >> 10); + return 0; +err1: + framebuffer_release(info); +err: + vfree(videomemory); + return retval; +} + +static int novafb_remove(struct platform_device *dev) +{ + struct fb_info *info = platform_get_drvdata(dev); + + if (info) { + unregister_framebuffer(info); + vfree((void __force *)info->screen_base); + framebuffer_release(info); + } + return 0; +} + +static struct platform_driver novafb_driver = { + .probe = novafb_probe, + .remove = novafb_remove, + .driver = { + .name = "novafb", + }, +}; + +static struct platform_device *novafb_device; + +static int __init novafb_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(&novafb_driver); + + if (!ret) { + novafb_device = platform_device_alloc("novafb", 0); + if (novafb_device) + { + ret = platform_device_add(novafb_device); + } + else + { + ret = -ENOMEM; + } + if (ret) + { + platform_device_put(novafb_device); + platform_driver_unregister(&novafb_driver); + } + + } + + + return ret; + +} + + +static void NT7506_init_lcd(char ael) +{ + /* this resets the lcd*/ + char bl; + if(_backlight) + bl=LCD_BCKLIGH; + else + bl=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,_backlight); + /* Disable ICON display*/ + NT7506_writeb_ctl(NT_ICON|OFF,_backlight); + /* Sets the duty ratio 1/128*/ + NT7506_writeb_ctl(NT_DUTY,_backlight); NT7506_writeb_ctl(DUTY_1_128,_backlight); + /* Sets reverse direction between RAM column address and segment driver*/ + NT7506_writeb_ctl(NT_ADC_REV,_backlight); + NT7506_writeb_ctl(NT_SHL_NOR,_backlight); + /* Enales the built in Oscillator circuit.*/ + NT7506_writeb_ctl(NT_OSC,_backlight); + /* Set Initial row to 0*/ + NT7506_writeb_ctl(NT_COM0,_backlight); NT7506_writeb_ctl(0,_backlight); + /* Sets DC-DC*/ + NT7506_writeb_ctl(NT_DCDC|TIME6,_backlight); + /* Selects resistance ratio of the internal resistor*/ + NT7506_writeb_ctl(NT_REG_RES|RES_7_2,_backlight); + /* set Reference Voltage mode*/ + NT7506_writeb_ctl(NT_ELEC_VOL,_backlight); NT7506_writeb_ctl(ael,_backlight); + /* Selects LCD bias ratio*/ + NT7506_writeb_ctl(NT_BIAS|BIAS_1_11,_backlight); + + NT7506_writeb_ctl(NT_DATA_DIR,_backlight); NT7506_writeb_ctl(0,_backlight); + NT7506_writeb_ctl(NT_FRC_PWM|PWM15,_backlight); + /* Select power circuit functions */ + NT7506_writeb_ctl(NT_POWER|VC,_backlight); + udelay(5000); + NT7506_writeb_ctl(NT_POWER|VC|VR,_backlight); + udelay(5000); + NT7506_writeb_ctl(NT_POWER|VC|VR|VF,_backlight); + udelay(5000); + /* Reverses the display status on LCD panel */ + NT7506_writeb_ctl(NT_REV_DISP|OFF,_backlight); + /* Forces the whole LCD points to be turned on regardless of the contents of the display data RAM*/ + NT7506_writeb_ctl(NT_DISP|ON,_backlight); + /* Set Initial Start Line Address */ + NT7506_writeb_ctl(NT_START_LINE,_backlight); NT7506_writeb_ctl(0x00,_backlight); + _refresh=1; +} + +static void __exit novafb_exit(void) +{ + if (lcd_mem) + release_mem_region(LCD_BASE, LCD_SIZE); + lcd_mem = NULL; + platform_device_unregister(novafb_device); + platform_driver_unregister(&novafb_driver); +} + +module_param(tuhold, ulong, 0); +MODULE_PARM_DESC(tuhold, "Time to hold between strobing data to Nova board"); + +module_init(novafb_init); +module_exit(novafb_exit); + +MODULE_DESCRIPTION("fbdev driver for nova NT7506 monochrome LCD board"); +MODULE_AUTHOR("Alexandre Coffignal"); +MODULE_LICENSE("GPL"); + Index: linux-2.6.26/include/linux/NT7506.h =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6.26/include/linux/NT7506.h 2008-12-09 10:04:16.000000000 +0100 @@ -0,0 +1,73 @@ + +/* + * (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_NOVAFB_H__ +#define __LINUX_NOVAFB_H__ + + +//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_OSC 0xAB +#define NT_RESET 0xE2 +#define NT_DATA_DIR 0xe8 +#define NT_FRC_PWM 0x90 +#define PWM15 0x03 + +#define ON 0x01 +#define OFF 0x00 + + + +#define FBIO_FRAMERATE _IOR('f', 1, char) +#define FBIO_CONTRAST _IOR('f', 2, char) +#define FBIO_BACKLIGHT _IOR('f', 3, char) + + +#endif +