hitfb.c
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上传日期:2013-04-10
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- /*
- * $Id: hitfb.c,v 1.2 2000/07/04 06:24:46 yaegashi Exp $
- * linux/drivers/video/hitfb.c -- Hitachi LCD frame buffer device
- * (C) 1999 Mihai Spatar
- * (C) 2000 YAEGASHI Takeshi
- *
- * 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.
- */
-
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.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/nubus.h>
- #include <linux/init.h>
- #include <asm/machvec.h>
- #include <asm/uaccess.h>
- #include <asm/pgtable.h>
- #include <asm/io.h>
- #include <asm/hd64461.h>
- #include <linux/fb.h>
- #include <video/fbcon.h>
- #include <video/fbcon-cfb8.h>
- #include <video/fbcon-cfb16.h>
- struct hitfb_par
- {
- int x, y;
- int bpp;
- };
- struct hitfb_info {
- struct fb_info_gen gen;
- struct display disp;
- struct hitfb_par current_par;
- struct fb_var_screeninfo default_var;
- int current_par_valid;
- unsigned long hit_videobase, hit_videosize;
- union {
- #ifdef FBCON_HAS_CFB16
- u16 cfb16[16];
- #endif
- } fbcon_cmap;
- } fb_info = {
- {},
- {},
- {},
- {},
- 0, 0, 0,
- {},
- };
- static void hitfb_set_par(const void *fb_par, struct fb_info_gen *info);
- static int hitfb_encode_var(struct fb_var_screeninfo *var, const void *fb_par,
- struct fb_info_gen *info);
- static void hitfb_detect(void)
- {
- struct hitfb_par par;
- unsigned short lcdclor, ldr3, ldvntr;
- fb_info.hit_videobase = CONFIG_HD64461_IOBASE + 0x02000000;
- fb_info.hit_videosize = (MACH_HP680 || MACH_HP690) ? 1024*1024 : 512*1024;
- lcdclor = inw(HD64461_LCDCLOR);
- ldvntr = inw(HD64461_LDVNTR);
- ldr3 = inw(HD64461_LDR3);
- switch(ldr3&15) {
- default:
- case 4:
- par.bpp = 8;
- par.x = lcdclor;
- break;
- case 8:
- par.bpp = 16;
- par.x = lcdclor/2;
- break;
- }
- par.y = ldvntr+1;
- hitfb_set_par(&par, NULL);
- hitfb_encode_var(&fb_info.default_var, &par, NULL);
- }
- static int hitfb_encode_fix(struct fb_fix_screeninfo *fix, const void *fb_par,
- struct fb_info_gen *info)
- {
- const struct hitfb_par *par = fb_par;
- memset(fix, 0, sizeof(struct fb_fix_screeninfo));
- strcpy(fix->id, "Hitachi HD64461");
- fix->smem_start = fb_info.hit_videobase;
- fix->smem_len = fb_info.hit_videosize;
- fix->type = FB_TYPE_PACKED_PIXELS;
- fix->type_aux = 0;
- fix->visual = (par->bpp == 8) ?
- FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
- fix->xpanstep = 0;
- fix->ypanstep = 0;
- fix->ywrapstep = 0;
- switch(par->bpp) {
- default:
- case 8:
- fix->line_length = par->x;
- break;
- case 16:
- fix->line_length = par->x*2;
- break;
- }
- return 0;
- }
- static int hitfb_decode_var(const struct fb_var_screeninfo *var, void *fb_par,
- struct fb_info_gen *info)
- {
- struct hitfb_par *par = fb_par;
- par->x = var->xres;
- par->y = var->yres;
- par->bpp = var->bits_per_pixel;
- return 0;
- }
- static int hitfb_encode_var(struct fb_var_screeninfo *var, const void *fb_par,
- struct fb_info_gen *info)
- {
- const struct hitfb_par *par = fb_par;
- memset(var, 0, sizeof(*var));
- var->xres = par->x;
- var->yres = par->y;
- var->xres_virtual = var->xres;
- var->yres_virtual = var->yres;
- var->xoffset = 0;
- var->yoffset = 0;
- var->bits_per_pixel = par->bpp;
- var->grayscale = 0;
- var->transp.offset = 0;
- var->transp.length = 0;
- var->transp.msb_right = 0;
- var->nonstd = 0;
- var->activate = 0;
- var->height = -1;
- var->width = -1;
- var->vmode = FB_VMODE_NONINTERLACED;
- var->pixclock = 0;
- var->sync = 0;
- var->left_margin = 0;
- var->right_margin = 0;
- var->upper_margin = 0;
- var->lower_margin = 0;
- var->hsync_len = 0;
- var->vsync_len = 0;
- switch (var->bits_per_pixel) {
- case 8:
- var->red.offset = 0;
- var->red.length = 8;
- var->green.offset = 0;
- var->green.length = 8;
- var->blue.offset = 0;
- var->blue.length = 8;
- var->transp.offset = 0;
- var->transp.length = 0;
- break;
- case 16: /* RGB 565 */
- var->red.offset = 11;
- var->red.length = 5;
- var->green.offset = 5;
- var->green.length = 6;
- var->blue.offset = 0;
- var->blue.length = 5;
- var->transp.offset = 0;
- var->transp.length = 0;
- break;
- }
- var->red.msb_right = 0;
- var->green.msb_right = 0;
- var->blue.msb_right = 0;
- var->transp.msb_right = 0;
- return 0;
- }
- static void hitfb_get_par(void *par, struct fb_info_gen *info)
- {
- *(struct hitfb_par *)par = fb_info.current_par;
- }
- static void hitfb_set_par(const void *fb_par, struct fb_info_gen *info)
- {
- const struct hitfb_par *par = fb_par;
- fb_info.current_par = *par;
- fb_info.current_par_valid = 1;
- }
- static int hitfb_getcolreg(unsigned regno, unsigned *red, unsigned *green,
- unsigned *blue, unsigned *transp,
- struct fb_info *info)
- {
- if (regno > 255)
- return 1;
- outw(regno<<8, HD64461_CPTRAR);
- *red = inw(HD64461_CPTRDR)<<10;
- *green = inw(HD64461_CPTRDR)<<10;
- *blue = inw(HD64461_CPTRDR)<<10;
- *transp = 0;
-
- return 0;
- }
- static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
- unsigned blue, unsigned transp,
- struct fb_info *info)
- {
- if (regno > 255)
- return 1;
-
- outw(regno<<8, HD64461_CPTWAR);
- outw(red>>10, HD64461_CPTWDR);
- outw(green>>10, HD64461_CPTWDR);
- outw(blue>>10, HD64461_CPTWDR);
-
- if(regno<16) {
- switch(fb_info.current_par.bpp) {
- #ifdef FBCON_HAS_CFB16
- case 16:
- fb_info.fbcon_cmap.cfb16[regno] =
- ((red & 0xf800) ) |
- ((green & 0xfc00) >> 5) |
- ((blue & 0xf800) >> 11);
- break;
- #endif
- }
- }
- return 0;
- }
- static int hitfb_pan_display(const struct fb_var_screeninfo *var,
- struct fb_info_gen *info)
- {
- if (!fb_info.current_par_valid)
- return -EINVAL;
- return 0;
- }
- static int hitfb_blank(int blank_mode, struct fb_info_gen *info)
- {
- if (!fb_info.current_par_valid)
- return 1;
- return 0;
- }
- static void hitfb_set_disp(const void *fb_par, struct display *disp,
- struct fb_info_gen *info)
- {
- const struct hitfb_par *par = fb_par;
- disp->screen_base = (void *)fb_info.hit_videobase;
- disp->scrollmode = SCROLL_YREDRAW;
- switch(((struct hitfb_par *)par)->bpp) {
- #ifdef FBCON_HAS_CFB8
- case 8:
- disp->dispsw = &fbcon_cfb8;
- break;
- #endif
- #ifdef FBCON_HAS_CFB16
- case 16:
- disp->dispsw = &fbcon_cfb16;
- disp->dispsw_data = fb_info.fbcon_cmap.cfb16;
- break;
- #endif
- default:
- disp->dispsw = &fbcon_dummy;
- }
- }
- struct fbgen_hwswitch hitfb_switch = {
- hitfb_detect,
- hitfb_encode_fix,
- hitfb_decode_var,
- hitfb_encode_var,
- hitfb_get_par,
- hitfb_set_par,
- hitfb_getcolreg,
- hitfb_setcolreg,
- hitfb_pan_display,
- hitfb_blank,
- hitfb_set_disp
- };
- static struct fb_ops hitfb_ops = {
- owner: THIS_MODULE,
- fb_get_fix: fbgen_get_fix,
- fb_get_var: fbgen_get_var,
- fb_set_var: fbgen_set_var,
- fb_get_cmap: fbgen_get_cmap,
- fb_set_cmap: fbgen_set_cmap,
- fb_pan_display: fbgen_pan_display,
- };
- int __init hitfb_init(void)
- {
- strcpy(fb_info.gen.info.modename, "Hitachi HD64461");
- fb_info.gen.info.node = -1;
- fb_info.gen.info.flags = FBINFO_FLAG_DEFAULT;
- fb_info.gen.info.fbops = &hitfb_ops;
- fb_info.gen.info.disp = &fb_info.disp;
- fb_info.gen.info.changevar = NULL;
- fb_info.gen.info.switch_con = &fbgen_switch;
- fb_info.gen.info.updatevar = &fbgen_update_var;
- fb_info.gen.info.blank = &fbgen_blank;
- fb_info.gen.parsize = sizeof(struct hitfb_par);
- fb_info.gen.fbhw = &hitfb_switch;
- fb_info.gen.fbhw->detect();
-
- fbgen_get_var(&fb_info.disp.var, -1, &fb_info.gen.info);
- fb_info.disp.var.activate = FB_ACTIVATE_NOW;
- fbgen_do_set_var(&fb_info.disp.var, 1, &fb_info.gen);
- fbgen_set_disp(-1, &fb_info.gen);
- fbgen_install_cmap(0, &fb_info.gen);
-
- if(register_framebuffer(&fb_info.gen.info)<0) return -EINVAL;
-
- printk(KERN_INFO "fb%d: %s frame buffer devicen",
- GET_FB_IDX(fb_info.gen.info.node), fb_info.gen.info.modename);
-
- return 0;
- }
- void hitfb_cleanup(struct fb_info *info)
- {
- unregister_framebuffer(info);
- }
- #ifdef MODULE
- MODULE_LICENSE("GPL");
- int init_module(void)
- {
- return hitfb_init();
- }
- void cleanup_module(void)
- {
- hitfb_cleanup(void);
- }
- #endif
- /*
- * Local variables:
- * c-basic-offset: 4
- * End:
- */