q40fb.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:9k
- #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/delay.h>
- #include <linux/interrupt.h>
- #include <asm/uaccess.h>
- #include <asm/setup.h>
- #include <asm/segment.h>
- #include <asm/system.h>
- /*#include <asm/irq.h>*/
- #include <asm/q40_master.h>
- #include <linux/fb.h>
- #include <linux/module.h>
- #include <asm/pgtable.h>
- #include <video/fbcon.h>
- #include <video/fbcon-cfb16.h>
- #define FBIOSETSCROLLMODE 0x4611
- #define Q40_PHYS_SCREEN_ADDR 0xFE800000
- static unsigned long q40_screen_addr;
- static u16 fbcon_cmap_cfb16[16];
- /* frame buffer operations */
- static int q40fb_get_fix(struct fb_fix_screeninfo *fix, int con,
- struct fb_info *info);
- static int q40fb_get_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info);
- static int q40fb_set_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info);
- static int q40fb_get_cmap(struct fb_cmap *cmap,int kspc,int con,
- struct fb_info *info);
- static int q40fb_set_cmap(struct fb_cmap *cmap,int kspc,int con,
- struct fb_info *info);
- static int q40fb_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg, int con,
- struct fb_info *info);
- static int q40con_switch(int con, struct fb_info *info);
- static int q40con_updatevar(int con, struct fb_info *info);
- static void q40con_blank(int blank, struct fb_info *info);
- static void q40fb_set_disp(int con, struct fb_info *info);
- static struct display disp[MAX_NR_CONSOLES];
- static struct fb_info fb_info;
- static struct fb_ops q40fb_ops = {
- owner: THIS_MODULE,
- fb_get_fix: q40fb_get_fix,
- fb_get_var: q40fb_get_var,
- fb_set_var: q40fb_set_var,
- fb_get_cmap: q40fb_get_cmap,
- fb_set_cmap: q40fb_set_cmap,
- fb_ioctl: q40fb_ioctl,
- };
- static int currcon=0;
- static char q40fb_name[]="Q40";
- static int q40fb_get_fix(struct fb_fix_screeninfo *fix, int con,
- struct fb_info *info)
- {
- memset(fix, 0, sizeof(struct fb_fix_screeninfo));
- strcpy(fix->id,"Q40");
- fix->smem_start=q40_screen_addr;
- fix->smem_len=1024*1024;
- fix->type=FB_TYPE_PACKED_PIXELS;
- fix->type_aux=0;
- fix->visual=FB_VISUAL_TRUECOLOR; /* good approximation so far ..*/;
- fix->xpanstep=0;
- fix->ypanstep=0;
- fix->ywrapstep=0;
- fix->line_length=1024*2;
- /* no mmio,accel ...*/
- return 0;
- }
-
- static int q40fb_get_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info)
- {
- memset(var, 0, sizeof(struct fb_var_screeninfo));
- var->xres=1024;
- var->yres=512;
- var->xres_virtual=1024;
- var->yres_virtual=512;
- var->xoffset=0;
- var->yoffset=0;
- var->bits_per_pixel=16;
- var->grayscale=0;
- var->nonstd=0;
- var->activate=FB_ACTIVATE_NOW;
- var->height=230; /* approx for my 17" monitor, more important */
- var->width=300; /* than the absolute values is the unusual aspect ratio*/
- var->red.offset=6; /*6*/
- var->red.length=5;
- var->green.offset=11; /*11*/
- var->green.length=5;
- var->blue.offset=0;
- var->blue.length=6;
- var->transp.length=0;
- var->pixclock=0;
- var->left_margin=0;
- var->right_margin=0;
- var->hsync_len=0;
- var->vsync_len=0;
- var->sync=0;
- var->vmode=FB_VMODE_NONINTERLACED;
- return 0;
- }
- static int q40fb_set_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info)
- {
- if(var->xres!=1024)
- return -EINVAL;
- if(var->yres!=512)
- return -EINVAL;
- if(var->xres_virtual!=1024)
- return -EINVAL;
- if(var->yres_virtual!=512)
- return -EINVAL;
- if(var->xoffset!=0)
- return -EINVAL;
- if(var->yoffset!=0)
- return -EINVAL;
- if(var->bits_per_pixel!=16)
- return -EINVAL;
- if(var->grayscale!=0)
- return -EINVAL;
- if(var->nonstd!=0)
- return -EINVAL;
- if(var->activate!=FB_ACTIVATE_NOW)
- return -EINVAL;
- if(var->pixclock!=0)
- return -EINVAL;
- if(var->left_margin!=0)
- return -EINVAL;
- if(var->right_margin!=0)
- return -EINVAL;
- if(var->hsync_len!=0)
- return -EINVAL;
- if(var->vsync_len!=0)
- return -EINVAL;
- if(var->sync!=0)
- return -EINVAL;
- if(var->vmode!=FB_VMODE_NONINTERLACED)
- return -EINVAL;
- return 0;
- }
- static int q40_getcolreg(unsigned regno, unsigned *red, unsigned *green,
- unsigned *blue, unsigned *transp,
- struct fb_info *info)
- {
- /*
- * Read a single color register and split it into colors/transparent.
- * The return values must have a 16 bit magnitude.
- * Return != 0 for invalid regno.
- */
- if (regno>=16) return 1;
- *transp=0;
- *green = ((fbcon_cmap_cfb16[regno]>>11) & 31)<<11;
- *red = ((fbcon_cmap_cfb16[regno]>>6) & 31)<<11;
- *blue = ((fbcon_cmap_cfb16[regno]) & 63)<<10;
- return 0;
- }
- static int q40_setcolreg(unsigned regno, unsigned red, unsigned green,
- unsigned blue, unsigned transp,
- const struct fb_info *info)
- {
- /*
- * Set a single color register. The values supplied have a 16 bit
- * magnitude.
- * Return != 0 for invalid regno.
- */
-
- red>>=11;
- green>>=11;
- blue>>=10;
- if (regno < 16) {
- fbcon_cmap_cfb16[regno] = ((red & 31) <<6) |
- ((green & 31) << 11) |
- (blue & 63);
- }
- return 0;
- }
- static int q40fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
- {
- #if 1
- if (con == currcon) /* current console? */
- return fb_get_cmap(cmap, kspc, q40_getcolreg, info);
- else if (fb_display[con].cmap.len) /* non default colormap? */
- fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
- else
- fb_copy_cmap(fb_default_cmap(1<<fb_display[con].var.bits_per_pixel),
- cmap, kspc ? 0 : 2);
- return 0;
- #else
- printk(KERN_ERR "get cmap not supportedn");
- return -EINVAL;
- #endif
- }
- static int q40fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
- {
- #if 1
- int err;
- if (!fb_display[con].cmap.len) { /* no colormap allocated? */
- if ((err = fb_alloc_cmap(&fb_display[con].cmap,
- 1<<fb_display[con].var.bits_per_pixel,
- 0)))
- return err;
- }
- if (con == currcon) /* current console? */
- return fb_set_cmap(cmap, kspc, q40_setcolreg, info);
- else
- fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
- return 0;
- #else
- printk(KERN_ERR "set cmap not supportedn");
- return -EINVAL;
- #endif
- }
- static int q40fb_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg, int con,
- struct fb_info *info)
- {
- #if 0
- unsigned long i;
- struct display *display;
- if (con>=0)
- display = &fb_display[con];
- else
- display = &disp[0];
- if (cmd == FBIOSETSCROLLMODE)
- {
- i = verify_area(VERIFY_READ, (void *)arg, sizeof(unsigned long));
- if (!i)
- {
- copy_from_user(&i, (void *)arg, sizeof(unsigned long));
- display->scrollmode = i;
- }
- q40_updatescrollmode(display);
- return i;
- }
- #endif
- return -EINVAL;
- }
- static void q40fb_set_disp(int con, struct fb_info *info)
- {
- struct fb_fix_screeninfo fix;
- struct display *display;
- q40fb_get_fix(&fix, con, info);
- if (con>=0)
- display = &fb_display[con];
- else
- display = &disp[0];
- if (con<0) con=0;
- display->screen_base = fix.smem_start;
- display->visual = fix.visual;
- display->type = fix.type;
- display->type_aux = fix.type_aux;
- display->ypanstep = fix.ypanstep;
- display->ywrapstep = fix.ywrapstep;
- display->can_soft_blank = 0;
- display->inverse = 0;
- display->line_length = fix.line_length;
- display->scrollmode = SCROLL_YREDRAW;
- #ifdef FBCON_HAS_CFB16
- display->dispsw = &fbcon_cfb16;
- disp->dispsw_data = fbcon_cmap_cfb16;
- #else
- display->dispsw = &fbcon_dummy;
- #endif
- }
-
- int __init q40fb_init(void)
- {
- if ( !MACH_IS_Q40)
- return -ENXIO;
- #if 0
- q40_screen_addr = kernel_map(Q40_PHYS_SCREEN_ADDR, 1024*1024,
- KERNELMAP_NO_COPYBACK, NULL);
- #else
- q40_screen_addr = Q40_PHYS_SCREEN_ADDR; /* mapped in q40/config.c */
- #endif
- fb_info.changevar=NULL;
- strcpy(&fb_info.modename[0],q40fb_name);
- fb_info.fontname[0]=0;
- fb_info.disp=disp;
- fb_info.switch_con=&q40con_switch;
- fb_info.updatevar=&q40con_updatevar;
- fb_info.blank=&q40con_blank;
- fb_info.node = -1;
- fb_info.fbops = &q40fb_ops;
- fb_info.flags = FBINFO_FLAG_DEFAULT; /* not as module for now */
-
- master_outb(3,DISPLAY_CONTROL_REG);
- q40fb_get_var(&disp[0].var, 0, &fb_info);
- q40fb_set_disp(-1, &fb_info);
- if (register_framebuffer(&fb_info) < 0) {
- printk(KERN_ERR "unable to register Q40 frame buffern");
- return -EINVAL;
- }
- printk(KERN_INFO "fb%d: Q40 frame buffer alive and kicking !n",
- GET_FB_IDX(fb_info.node));
- return 0;
- }
-
- static int q40con_switch(int con, struct fb_info *info)
- {
- currcon=con;
-
- return 0;
- }
- static int q40con_updatevar(int con, struct fb_info *info)
- {
- return 0;
- }
- static void q40con_blank(int blank, struct fb_info *info)
- {
- }
- MODULE_LICENSE("GPL");