sun3fb.c
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上传日期:2013-02-24
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文件大小:18k
- /*
- * linux/drivers/video/sun3fb.c -- Frame buffer driver for Sun3
- *
- * (C) 1998 Thomas Bogendoerfer
- *
- * This driver is bases on sbusfb.c, which is
- *
- * Copyright (C) 1998 Jakub Jelinek
- *
- * This driver is partly based on the Open Firmware console driver
- *
- * Copyright (C) 1997 Geert Uytterhoeven
- *
- * and SPARC console subsystem
- *
- * Copyright (C) 1995 Peter Zaitcev (zaitcev@yahoo.com)
- * Copyright (C) 1995-1997 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1995-1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
- * Copyright (C) 1996 Dave Redman (djhr@tadpole.co.uk)
- * Copyright (C) 1996-1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
- *
- * 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/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/selection.h>
- #include <linux/init.h>
- #include <linux/console.h>
- #include <linux/kd.h>
- #include <linux/vt_kern.h>
- #include <asm/uaccess.h>
- #include <asm/pgtable.h> /* io_remap_page_range() */
- #ifdef CONFIG_SUN3
- #include <asm/oplib.h>
- #endif
- #ifdef CONFIG_SUN3X
- #include <asm/sun3x.h>
- #endif
- #include <video/sbusfb.h>
- #define DEFAULT_CURSOR_BLINK_RATE (2*HZ/5)
- #define CURSOR_SHAPE 1
- #define CURSOR_BLINK 2
- /*
- * Interface used by the world
- */
- int sun3fb_init(void);
- int sun3fb_setup(char *options);
- static int currcon;
- static char fontname[40] __initdata = { 0 };
- static int curblink __initdata = 1;
- static int sun3fb_get_fix(struct fb_fix_screeninfo *fix, int con,
- struct fb_info *info);
- static int sun3fb_get_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info);
- static int sun3fb_set_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info);
- static int sun3fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info);
- static int sun3fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info);
- static void sun3fb_cursor(struct display *p, int mode, int x, int y);
- static void sun3fb_clear_margin(struct display *p, int s);
-
- /*
- * Interface to the low level console driver
- */
- static int sun3fbcon_switch(int con, struct fb_info *info);
- static int sun3fbcon_updatevar(int con, struct fb_info *info);
- static void sun3fbcon_blank(int blank, struct fb_info *info);
- /*
- * Internal routines
- */
- static int sun3fb_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
- u_int *transp, struct fb_info *info);
- static int sun3fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
- u_int transp, struct fb_info *info);
- static void do_install_cmap(int con, struct fb_info *info);
- static struct fb_ops sun3fb_ops = {
- owner: THIS_MODULE,
- fb_get_fix: sun3fb_get_fix,
- fb_get_var: sun3fb_get_var,
- fb_set_var: sun3fb_set_var,
- fb_get_cmap: sun3fb_get_cmap,
- fb_set_cmap: sun3fb_set_cmap,
- };
- static void sun3fb_clear_margin(struct display *p, int s)
- {
- struct fb_info_sbusfb *fb = sbusfbinfod(p);
- if (fb->switch_from_graph)
- (*fb->switch_from_graph)(fb);
- if (fb->fill) {
- unsigned short rects [16];
- rects [0] = 0;
- rects [1] = 0;
- rects [2] = fb->var.xres_virtual;
- rects [3] = fb->y_margin;
- rects [4] = 0;
- rects [5] = fb->y_margin;
- rects [6] = fb->x_margin;
- rects [7] = fb->var.yres_virtual;
- rects [8] = fb->var.xres_virtual - fb->x_margin;
- rects [9] = fb->y_margin;
- rects [10] = fb->var.xres_virtual;
- rects [11] = fb->var.yres_virtual;
- rects [12] = fb->x_margin;
- rects [13] = fb->var.yres_virtual - fb->y_margin;
- rects [14] = fb->var.xres_virtual - fb->x_margin;
- rects [15] = fb->var.yres_virtual;
- (*fb->fill)(fb, p, s, 4, rects);
- } else {
- unsigned char *fb_base = p->screen_base, *q;
- int skip_bytes = fb->y_margin * fb->var.xres_virtual;
- int scr_size = fb->var.xres_virtual * fb->var.yres_virtual;
- int h, he, incr, size;
- he = fb->var.yres;
- if (fb->var.bits_per_pixel == 1) {
- fb_base -= (skip_bytes + fb->x_margin) / 8;
- skip_bytes /= 8;
- scr_size /= 8;
- mymemset (fb_base, skip_bytes - fb->x_margin / 8);
- mymemset (fb_base + scr_size - skip_bytes + fb->x_margin / 8, skip_bytes - fb->x_margin / 8);
- incr = fb->var.xres_virtual / 8;
- size = fb->x_margin / 8 * 2;
- for (q = fb_base + skip_bytes - fb->x_margin / 8, h = 0;
- h <= he; q += incr, h++)
- mymemset (q, size);
- } else {
- fb_base -= (skip_bytes + fb->x_margin);
- memset (fb_base, attr_bgcol(p,s), skip_bytes - fb->x_margin);
- memset (fb_base + scr_size - skip_bytes + fb->x_margin, attr_bgcol(p,s), skip_bytes - fb->x_margin);
- incr = fb->var.xres_virtual;
- size = fb->x_margin * 2;
- for (q = fb_base + skip_bytes - fb->x_margin, h = 0;
- h <= he; q += incr, h++)
- memset (q, attr_bgcol(p,s), size);
- }
- }
- }
- static void sun3fb_disp_setup(struct display *p)
- {
- struct fb_info_sbusfb *fb = sbusfbinfod(p);
- if (fb->setup)
- fb->setup(p);
- sun3fb_clear_margin(p, 0);
- }
- /*
- * Get the Fixed Part of the Display
- */
- static int sun3fb_get_fix(struct fb_fix_screeninfo *fix, int con,
- struct fb_info *info)
- {
- struct fb_info_sbusfb *fb = sbusfbinfo(info);
- memcpy(fix, &fb->fix, sizeof(struct fb_fix_screeninfo));
- return 0;
- }
- /*
- * Get the User Defined Part of the Display
- */
- static int sun3fb_get_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info)
- {
- struct fb_info_sbusfb *fb = sbusfbinfo(info);
- memcpy(var, &fb->var, sizeof(struct fb_var_screeninfo));
- return 0;
- }
- /*
- * Set the User Defined Part of the Display
- */
- static int sun3fb_set_var(struct fb_var_screeninfo *var, int con,
- struct fb_info *info)
- {
- struct fb_info_sbusfb *fb = sbusfbinfo(info);
- if (var->xres > fb->var.xres || var->yres > fb->var.yres ||
- var->xres_virtual > fb->var.xres_virtual ||
- var->yres_virtual > fb->var.yres_virtual ||
- var->bits_per_pixel != fb->var.bits_per_pixel ||
- var->nonstd ||
- (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
- return -EINVAL;
- memcpy(var, &fb->var, sizeof(struct fb_var_screeninfo));
- return 0;
- }
- /*
- * Hardware cursor
- */
-
- static unsigned char hw_cursor_cmap[2] = { 0, 0xff };
- static void
- sun3fb_cursor_timer_handler(unsigned long dev_addr)
- {
- struct fb_info_sbusfb *fb = (struct fb_info_sbusfb *)dev_addr;
-
- if (!fb->setcursor) return;
-
- if (fb->cursor.mode & CURSOR_BLINK) {
- fb->cursor.enable ^= 1;
- fb->setcursor(fb);
- }
-
- fb->cursor.timer.expires = jiffies + fb->cursor.blink_rate;
- add_timer(&fb->cursor.timer);
- }
- static void sun3fb_cursor(struct display *p, int mode, int x, int y)
- {
- struct fb_info_sbusfb *fb = sbusfbinfod(p);
-
- switch (mode) {
- case CM_ERASE:
- fb->cursor.mode &= ~CURSOR_BLINK;
- fb->cursor.enable = 0;
- (*fb->setcursor)(fb);
- break;
-
- case CM_MOVE:
- case CM_DRAW:
- if (fb->cursor.mode & CURSOR_SHAPE) {
- fb->cursor.size.fbx = fontwidth(p);
- fb->cursor.size.fby = fontheight(p);
- fb->cursor.chot.fbx = 0;
- fb->cursor.chot.fby = 0;
- fb->cursor.enable = 1;
- memset (fb->cursor.bits, 0, sizeof (fb->cursor.bits));
- fb->cursor.bits[0][fontheight(p) - 2] = (0xffffffff << (32 - fontwidth(p)));
- fb->cursor.bits[1][fontheight(p) - 2] = (0xffffffff << (32 - fontwidth(p)));
- fb->cursor.bits[0][fontheight(p) - 1] = (0xffffffff << (32 - fontwidth(p)));
- fb->cursor.bits[1][fontheight(p) - 1] = (0xffffffff << (32 - fontwidth(p)));
- (*fb->setcursormap) (fb, hw_cursor_cmap, hw_cursor_cmap, hw_cursor_cmap);
- (*fb->setcurshape) (fb);
- }
- fb->cursor.mode = CURSOR_BLINK;
- if (fontwidthlog(p))
- fb->cursor.cpos.fbx = (x << fontwidthlog(p)) + fb->x_margin;
- else
- fb->cursor.cpos.fbx = (x * fontwidth(p)) + fb->x_margin;
- if (fontheightlog(p))
- fb->cursor.cpos.fby = (y << fontheightlog(p)) + fb->y_margin;
- else
- fb->cursor.cpos.fby = (y * fontheight(p)) + fb->y_margin;
- (*fb->setcursor)(fb);
- break;
- }
- }
- /*
- * Get the Colormap
- */
- static int sun3fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
- {
- if (con == currcon) /* current console? */
- return fb_get_cmap(cmap, kspc, sun3fb_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;
- }
- /*
- * Set the Colormap
- */
- static int sun3fb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
- struct fb_info *info)
- {
- 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? */
- err = fb_set_cmap(cmap, kspc, sun3fb_setcolreg, info);
- if (!err) {
- struct fb_info_sbusfb *fb = sbusfbinfo(info);
-
- if (fb->loadcmap)
- (*fb->loadcmap)(fb, &fb_display[con], cmap->start, cmap->len);
- }
- return err;
- } else
- fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
- return 0;
- }
- /*
- * Setup: parse used options
- */
- void __init sun3fb_setup(char *options)
- {
- char *p;
-
- for (p = options;;) {
- if (!strncmp(p, "font=", 5)) {
- int i;
-
- for (i = 0; i < sizeof(fontname) - 1; i++)
- if (p[i+5] == ' ' || !p[i+5])
- break;
- memcpy(fontname, p+5, i);
- fontname[i] = 0;
- } else if (!strncmp(p, "noblink", 7))
- curblink = 0;
- while (*p && *p != ' ' && *p != ',') p++;
- if (*p != ',') break;
- p++;
- }
- return 0;
- }
- static int sun3fbcon_switch(int con, struct fb_info *info)
- {
- int x_margin, y_margin;
- struct fb_info_sbusfb *fb = sbusfbinfo(info);
- int lastconsole;
-
- /* Do we have to save the colormap? */
- if (fb_display[currcon].cmap.len)
- fb_get_cmap(&fb_display[currcon].cmap, 1, sun3fb_getcolreg, info);
- if (info->display_fg) {
- lastconsole = info->display_fg->vc_num;
- if (lastconsole != con &&
- (fontwidth(&fb_display[lastconsole]) != fontwidth(&fb_display[con]) ||
- fontheight(&fb_display[lastconsole]) != fontheight(&fb_display[con])))
- fb->cursor.mode |= CURSOR_SHAPE;
- }
- x_margin = (fb_display[con].var.xres_virtual - fb_display[con].var.xres) / 2;
- y_margin = (fb_display[con].var.yres_virtual - fb_display[con].var.yres) / 2;
- if (fb->margins)
- fb->margins(fb, &fb_display[con], x_margin, y_margin);
- if (fb->graphmode || fb->x_margin != x_margin || fb->y_margin != y_margin) {
- fb->x_margin = x_margin; fb->y_margin = y_margin;
- sun3fb_clear_margin(&fb_display[con], 0);
- }
- currcon = con;
- /* Install new colormap */
- do_install_cmap(con, info);
- return 0;
- }
- /*
- * Update the `var' structure (called by fbcon.c)
- */
- static int sun3fbcon_updatevar(int con, struct fb_info *info)
- {
- /* Nothing */
- return 0;
- }
- /*
- * Blank the display.
- */
- static void sun3fbcon_blank(int blank, struct fb_info *info)
- {
- struct fb_info_sbusfb *fb = sbusfbinfo(info);
-
- if (blank && fb->blank)
- return fb->blank(fb);
- else if (!blank && fb->unblank)
- return fb->unblank(fb);
- }
- /*
- * Read a single color register and split it into
- * colors/transparent. Return != 0 for invalid regno.
- */
- static int sun3fb_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
- u_int *transp, struct fb_info *info)
- {
- struct fb_info_sbusfb *fb = sbusfbinfo(info);
- if (!fb->color_map || regno > 255)
- return 1;
- *red = (fb->color_map CM(regno, 0)<<8) | fb->color_map CM(regno, 0);
- *green = (fb->color_map CM(regno, 1)<<8) | fb->color_map CM(regno, 1);
- *blue = (fb->color_map CM(regno, 2)<<8) | fb->color_map CM(regno, 2);
- *transp = 0;
- return 0;
- }
- /*
- * Set a single color register. The values supplied are already
- * rounded down to the hardware's capabilities (according to the
- * entries in the var structure). Return != 0 for invalid regno.
- */
- static int sun3fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
- u_int transp, struct fb_info *info)
- {
- struct fb_info_sbusfb *fb = sbusfbinfo(info);
- if (!fb->color_map || regno > 255)
- return 1;
- red >>= 8;
- green >>= 8;
- blue >>= 8;
- fb->color_map CM(regno, 0) = red;
- fb->color_map CM(regno, 1) = green;
- fb->color_map CM(regno, 2) = blue;
- return 0;
- }
- static void do_install_cmap(int con, struct fb_info *info)
- {
- struct fb_info_sbusfb *fb = sbusfbinfo(info);
-
- if (con != currcon)
- return;
- if (fb_display[con].cmap.len)
- fb_set_cmap(&fb_display[con].cmap, 1, sun3fb_setcolreg, info);
- else
- fb_set_cmap(fb_default_cmap(1<<fb_display[con].var.bits_per_pixel),
- 1, sun3fb_setcolreg, info);
- if (fb->loadcmap)
- (*fb->loadcmap)(fb, &fb_display[con], 0, 256);
- }
- static int sun3fb_set_font(struct display *p, int width, int height)
- {
- int w = p->var.xres_virtual, h = p->var.yres_virtual;
- int depth = p->var.bits_per_pixel;
- struct fb_info_sbusfb *fb = sbusfbinfod(p);
- int x_margin, y_margin;
-
- if (depth > 8) depth = 8;
- x_margin = (w % width) / 2;
- y_margin = (h % height) / 2;
- p->var.xres = w - 2*x_margin;
- p->var.yres = h - 2*y_margin;
-
- fb->cursor.mode |= CURSOR_SHAPE;
-
- if (fb->margins)
- fb->margins(fb, p, x_margin, y_margin);
- if (fb->x_margin != x_margin || fb->y_margin != y_margin) {
- fb->x_margin = x_margin; fb->y_margin = y_margin;
- sun3fb_clear_margin(p, 0);
- }
- return 1;
- }
- void sun3fb_palette(int enter)
- {
- int i;
- struct display *p;
-
- for (i = 0; i < MAX_NR_CONSOLES; i++) {
- p = &fb_display[i];
- if (p->dispsw && p->dispsw->setup == sun3fb_disp_setup &&
- p->fb_info->display_fg &&
- p->fb_info->display_fg->vc_num == i) {
- struct fb_info_sbusfb *fb = sbusfbinfod(p);
- if (fb->restore_palette) {
- if (enter)
- fb->restore_palette(fb);
- else if (vt_cons[i]->vc_mode != KD_GRAPHICS)
- vc_cons[i].d->vc_sw->con_set_palette(vc_cons[i].d, color_table);
- }
- }
- }
- }
- /*
- * Initialisation
- */
- static int __init sun3fb_init_fb(int fbtype, unsigned long addr)
- {
- static struct linux_sbus_device sdb;
- struct fb_fix_screeninfo *fix;
- struct fb_var_screeninfo *var;
- struct display *disp;
- struct fb_info_sbusfb *fb;
- struct fbtype *type;
- int linebytes, w, h, depth;
- char *p = NULL;
- fb = kmalloc(sizeof(struct fb_info_sbusfb), GFP_ATOMIC);
- if (!fb)
- return -ENOMEM;
-
- memset(fb, 0, sizeof(struct fb_info_sbusfb));
- fix = &fb->fix;
- var = &fb->var;
- disp = &fb->disp;
- type = &fb->type;
-
- sdb.reg_addrs[0].phys_addr = addr;
- fb->sbdp = &sdb;
- type->fb_type = fbtype;
-
- type->fb_height = h = 900;
- type->fb_width = w = 1152;
- sizechange:
- type->fb_depth = depth = (fbtype == FBTYPE_SUN2BW) ? 1 : 8;
- linebytes = w * depth / 8;
- type->fb_size = PAGE_ALIGN((linebytes) * h);
-
- fb->x_margin = (w & 7) / 2;
- fb->y_margin = (h & 15) / 2;
- var->xres_virtual = w;
- var->yres_virtual = h;
- var->xres = w - 2*fb->x_margin;
- var->yres = h - 2*fb->y_margin;
-
- var->bits_per_pixel = depth;
- var->height = var->width = -1;
- var->pixclock = 10000;
- var->vmode = FB_VMODE_NONINTERLACED;
- var->red.length = var->green.length = var->blue.length = 8;
- fix->line_length = linebytes;
- fix->smem_len = type->fb_size;
- fix->type = FB_TYPE_PACKED_PIXELS;
- fix->visual = FB_VISUAL_PSEUDOCOLOR;
-
- fb->info.node = -1;
- fb->info.fbops = &sun3fb_ops;
- fb->info.disp = disp;
- strcpy(fb->info.fontname, fontname);
- fb->info.changevar = NULL;
- fb->info.switch_con = &sun3fbcon_switch;
- fb->info.updatevar = &sun3fbcon_updatevar;
- fb->info.blank = &sun3fbcon_blank;
- fb->info.flags = FBINFO_FLAG_DEFAULT;
-
- fb->cursor.hwsize.fbx = 32;
- fb->cursor.hwsize.fby = 32;
-
- if (depth > 1 && !fb->color_map) {
- if((fb->color_map = kmalloc(256 * 3, GFP_ATOMIC))==NULL)
- return -ENOMEM;
- }
-
- switch(fbtype) {
- #ifdef CONFIG_FB_CGSIX
- case FBTYPE_SUNFAST_COLOR:
- p = cgsixfb_init(fb); break;
- #endif
- #ifdef CONFIG_FB_BWTWO
- case FBTYPE_SUN2BW:
- p = bwtwofb_init(fb); break;
- #endif
- }
- fix->smem_start = fb->disp.screen_base;
-
- if (!p) {
- kfree(fb);
- return -ENODEV;
- }
-
- if (p == SBUSFBINIT_SIZECHANGE)
- goto sizechange;
- disp->dispsw = &fb->dispsw;
- if (fb->setcursor) {
- fb->dispsw.cursor = sun3fb_cursor;
- if (curblink) {
- fb->cursor.blink_rate = DEFAULT_CURSOR_BLINK_RATE;
- init_timer(&fb->cursor.timer);
- fb->cursor.timer.expires = jiffies + fb->cursor.blink_rate;
- fb->cursor.timer.data = (unsigned long)fb;
- fb->cursor.timer.function = sun3fb_cursor_timer_handler;
- add_timer(&fb->cursor.timer);
- }
- }
- fb->cursor.mode = CURSOR_SHAPE;
- fb->dispsw.set_font = sun3fb_set_font;
- fb->setup = fb->dispsw.setup;
- fb->dispsw.setup = sun3fb_disp_setup;
- fb->dispsw.clear_margins = NULL;
- disp->var = *var;
- disp->visual = fix->visual;
- disp->type = fix->type;
- disp->type_aux = fix->type_aux;
- disp->line_length = fix->line_length;
-
- if (fb->blank)
- disp->can_soft_blank = 1;
- sun3fb_set_var(var, -1, &fb->info);
- if (register_framebuffer(&fb->info) < 0) {
- kfree(fb);
- return -EINVAL;
- }
- printk("fb%d: %sn", GET_FB_IDX(fb->info.node), p);
- return 0;
- }
- int __init sun3fb_init(void)
- {
- extern int con_is_present(void);
- unsigned long addr;
- char p4id;
-
- if (!con_is_present()) return;
- printk("sun3fb_init()n");
- #ifdef CONFIG_SUN3
- addr = 0xfe20000;
- switch(*(romvec->pv_fbtype))
- {
- case FBTYPE_SUN2BW:
- return sun3fb_init_fb(FBTYPE_SUN2BW, addr);
- case FBTYPE_SUN3COLOR:
- printk("cg3 detected but not supportedn");
- return -EINVAL;
- }
- #else
- addr = SUN3X_VIDEO_BASE;
- p4id = *(char *)SUN3X_VIDEO_P4ID;
- p4id = (p4id == 0x45) ? p4id : (p4id & 0xf0);
- switch (p4id) {
- case 0x00:
- return sun3fb_init_fb(FBTYPE_SUN2BW, addr);
- #if 0 /* not yet */
- case 0x40:
- sun3fb_init_fb(FBTYPE_SUN4COLOR, addr);
- break;
- case 0x45:
- sun3fb_init_fb(FBTYPE_SUN8COLOR, addr);
- break;
- #endif
- case 0x60:
- return sun3fb_init_fb(FBTYPE_SUNFAST_COLOR, addr);
- }
- #endif
- }
- MODULE_LICENSE("GPL");