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587 lines
16 KiB
C
587 lines
16 KiB
C
/*
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* valkyriefb.c -- frame buffer device for the PowerMac 'valkyrie' display
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*
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* Created 8 August 1998 by
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* Martin Costabel <costabel@wanadoo.fr> and Kevin Schoedel
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*
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* Vmode-switching changes and vmode 15/17 modifications created 29 August
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* 1998 by Barry K. Nathan <barryn@pobox.com>.
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*
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* Ported to m68k Macintosh by David Huggins-Daines <dhd@debian.org>
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*
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* Derived directly from:
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*
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* controlfb.c -- frame buffer device for the PowerMac 'control' display
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* Copyright (C) 1998 Dan Jacobowitz <dan@debian.org>
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*
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* pmc-valkyrie.c -- Console support for PowerMac "valkyrie" display adaptor.
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* Copyright (C) 1997 Paul Mackerras.
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*
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* and indirectly:
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*
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* Frame buffer structure from:
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* drivers/video/chipsfb.c -- frame buffer device for
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* Chips & Technologies 65550 chip.
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*
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* Copyright (C) 1998 Paul Mackerras
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*
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* This file is derived from the Powermac "chips" driver:
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* Copyright (C) 1997 Fabio Riccardi.
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* And from the frame buffer device for Open Firmware-initialized devices:
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* Copyright (C) 1997 Geert Uytterhoeven.
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*
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* Hardware information from:
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* control.c: Console support for PowerMac "control" display adaptor.
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* Copyright (C) 1996 Paul Mackerras
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/fb.h>
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#include <linux/selection.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/nvram.h>
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#include <linux/adb.h>
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#include <linux/cuda.h>
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#include <asm/io.h>
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#ifdef CONFIG_MAC
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#include <asm/bootinfo.h>
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#include <asm/macintosh.h>
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#else
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#include <asm/prom.h>
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#endif
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#include <asm/pgtable.h>
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#include "macmodes.h"
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#include "valkyriefb.h"
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#ifdef CONFIG_MAC
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/* We don't yet have functions to read the PRAM... perhaps we can
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adapt them from the PPC code? */
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static int default_vmode = VMODE_640_480_67;
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static int default_cmode = CMODE_8;
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#else
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static int default_vmode = VMODE_NVRAM;
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static int default_cmode = CMODE_NVRAM;
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#endif
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struct fb_par_valkyrie {
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int vmode, cmode;
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int xres, yres;
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int vxres, vyres;
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struct valkyrie_regvals *init;
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};
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struct fb_info_valkyrie {
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struct fb_info info;
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struct fb_par_valkyrie par;
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struct cmap_regs __iomem *cmap_regs;
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unsigned long cmap_regs_phys;
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struct valkyrie_regs __iomem *valkyrie_regs;
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unsigned long valkyrie_regs_phys;
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__u8 __iomem *frame_buffer;
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unsigned long frame_buffer_phys;
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int sense;
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unsigned long total_vram;
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u32 pseudo_palette[16];
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};
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/*
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* Exported functions
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*/
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int valkyriefb_init(void);
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int valkyriefb_setup(char*);
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static int valkyriefb_check_var(struct fb_var_screeninfo *var,
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struct fb_info *info);
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static int valkyriefb_set_par(struct fb_info *info);
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static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
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u_int transp, struct fb_info *info);
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static int valkyriefb_blank(int blank_mode, struct fb_info *info);
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static int read_valkyrie_sense(struct fb_info_valkyrie *p);
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static void set_valkyrie_clock(unsigned char *params);
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static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
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struct fb_par_valkyrie *par, const struct fb_info *fb_info);
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static void valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p);
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static void valkyrie_par_to_fix(struct fb_par_valkyrie *par, struct fb_fix_screeninfo *fix);
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static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p);
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static struct fb_ops valkyriefb_ops = {
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.owner = THIS_MODULE,
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.fb_check_var = valkyriefb_check_var,
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.fb_set_par = valkyriefb_set_par,
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.fb_setcolreg = valkyriefb_setcolreg,
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.fb_blank = valkyriefb_blank,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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};
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/* Sets the video mode according to info->var */
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static int valkyriefb_set_par(struct fb_info *info)
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{
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struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
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volatile struct valkyrie_regs __iomem *valkyrie_regs = p->valkyrie_regs;
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struct fb_par_valkyrie *par = info->par;
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struct valkyrie_regvals *init;
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int err;
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if ((err = valkyrie_var_to_par(&info->var, par, info)))
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return err;
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valkyrie_par_to_fix(par, &info->fix);
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/* Reset the valkyrie */
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out_8(&valkyrie_regs->status.r, 0);
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udelay(100);
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/* Initialize display timing registers */
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init = par->init;
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out_8(&valkyrie_regs->mode.r, init->mode | 0x80);
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out_8(&valkyrie_regs->depth.r, par->cmode + 3);
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set_valkyrie_clock(init->clock_params);
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udelay(100);
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/* Turn on display */
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out_8(&valkyrie_regs->mode.r, init->mode);
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return 0;
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}
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static inline int valkyrie_par_to_var(struct fb_par_valkyrie *par,
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struct fb_var_screeninfo *var)
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{
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return mac_vmode_to_var(par->vmode, par->cmode, var);
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}
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static int
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valkyriefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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int err;
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struct fb_par_valkyrie par;
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if ((err = valkyrie_var_to_par(var, &par, info)))
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return err;
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valkyrie_par_to_var(&par, var);
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return 0;
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}
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/*
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* Blank the screen if blank_mode != 0, else unblank. If blank_mode == NULL
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* then the caller blanks by setting the CLUT (Color Look Up Table) to all
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* black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
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* to e.g. a video mode which doesn't support it. Implements VESA suspend
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* and powerdown modes on hardware that supports disabling hsync/vsync:
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* blank_mode == 2: suspend vsync
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* blank_mode == 3: suspend hsync
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* blank_mode == 4: powerdown
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*/
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static int valkyriefb_blank(int blank_mode, struct fb_info *info)
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{
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struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
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struct fb_par_valkyrie *par = info->par;
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struct valkyrie_regvals *init = par->init;
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if (init == NULL)
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return 1;
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switch (blank_mode) {
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case FB_BLANK_UNBLANK: /* unblank */
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out_8(&p->valkyrie_regs->mode.r, init->mode);
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break;
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case FB_BLANK_NORMAL:
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return 1; /* get caller to set CLUT to all black */
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case FB_BLANK_VSYNC_SUSPEND:
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case FB_BLANK_HSYNC_SUSPEND:
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/*
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* [kps] Value extracted from MacOS. I don't know
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* whether this bit disables hsync or vsync, or
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* whether the hardware can do the other as well.
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*/
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out_8(&p->valkyrie_regs->mode.r, init->mode | 0x40);
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break;
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case FB_BLANK_POWERDOWN:
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out_8(&p->valkyrie_regs->mode.r, 0x66);
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break;
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}
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return 0;
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}
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static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
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u_int transp, struct fb_info *info)
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{
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struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
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volatile struct cmap_regs __iomem *cmap_regs = p->cmap_regs;
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struct fb_par_valkyrie *par = info->par;
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if (regno > 255)
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return 1;
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red >>= 8;
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green >>= 8;
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blue >>= 8;
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/* tell clut which address to fill */
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out_8(&p->cmap_regs->addr, regno);
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udelay(1);
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/* send one color channel at a time */
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out_8(&cmap_regs->lut, red);
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out_8(&cmap_regs->lut, green);
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out_8(&cmap_regs->lut, blue);
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if (regno < 16 && par->cmode == CMODE_16)
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((u32 *)info->pseudo_palette)[regno] =
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(regno << 10) | (regno << 5) | regno;
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return 0;
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}
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static inline int valkyrie_vram_reqd(int video_mode, int color_mode)
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{
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int pitch;
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struct valkyrie_regvals *init = valkyrie_reg_init[video_mode-1];
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if ((pitch = init->pitch[color_mode]) == 0)
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pitch = 2 * init->pitch[0];
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return init->vres * pitch;
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}
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static void set_valkyrie_clock(unsigned char *params)
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{
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struct adb_request req;
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int i;
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#ifdef CONFIG_ADB_CUDA
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for (i = 0; i < 3; ++i) {
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cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
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0x50, i + 1, params[i]);
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while (!req.complete)
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cuda_poll();
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}
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#endif
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}
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static void __init valkyrie_choose_mode(struct fb_info_valkyrie *p)
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{
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p->sense = read_valkyrie_sense(p);
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printk(KERN_INFO "Monitor sense value = 0x%x\n", p->sense);
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/* Try to pick a video mode out of NVRAM if we have one. */
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#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
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if (default_vmode == VMODE_NVRAM) {
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default_vmode = nvram_read_byte(NV_VMODE);
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if (default_vmode <= 0
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|| default_vmode > VMODE_MAX
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|| !valkyrie_reg_init[default_vmode - 1])
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default_vmode = VMODE_CHOOSE;
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}
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#endif
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if (default_vmode == VMODE_CHOOSE)
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default_vmode = mac_map_monitor_sense(p->sense);
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if (!valkyrie_reg_init[default_vmode - 1])
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default_vmode = VMODE_640_480_67;
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#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
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if (default_cmode == CMODE_NVRAM)
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default_cmode = nvram_read_byte(NV_CMODE);
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#endif
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/*
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* Reduce the pixel size if we don't have enough VRAM or bandwidth.
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*/
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if (default_cmode < CMODE_8 || default_cmode > CMODE_16
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|| valkyrie_reg_init[default_vmode-1]->pitch[default_cmode] == 0
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|| valkyrie_vram_reqd(default_vmode, default_cmode) > p->total_vram)
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default_cmode = CMODE_8;
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printk(KERN_INFO "using video mode %d and color mode %d.\n",
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default_vmode, default_cmode);
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}
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int __init valkyriefb_init(void)
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{
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struct fb_info_valkyrie *p;
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unsigned long frame_buffer_phys, cmap_regs_phys, flags;
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int err;
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char *option = NULL;
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if (fb_get_options("valkyriefb", &option))
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return -ENODEV;
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valkyriefb_setup(option);
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#ifdef CONFIG_MAC
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if (!MACH_IS_MAC)
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return 0;
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if (!(mac_bi_data.id == MAC_MODEL_Q630
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/* I'm not sure about this one */
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|| mac_bi_data.id == MAC_MODEL_P588))
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return 0;
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/* Hardcoded addresses... welcome to 68k Macintosh country :-) */
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frame_buffer_phys = 0xf9000000;
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cmap_regs_phys = 0x50f24000;
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flags = IOMAP_NOCACHE_SER; /* IOMAP_WRITETHROUGH?? */
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#else /* ppc (!CONFIG_MAC) */
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{
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struct device_node *dp;
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struct resource r;
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dp = of_find_node_by_name(NULL, "valkyrie");
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if (dp == 0)
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return 0;
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if (of_address_to_resource(dp, 0, &r)) {
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printk(KERN_ERR "can't find address for valkyrie\n");
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return 0;
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}
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frame_buffer_phys = r.start;
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cmap_regs_phys = r.start + 0x304000;
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flags = _PAGE_WRITETHRU;
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}
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#endif /* ppc (!CONFIG_MAC) */
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p = kmalloc(sizeof(*p), GFP_ATOMIC);
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if (p == 0)
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return -ENOMEM;
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memset(p, 0, sizeof(*p));
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/* Map in frame buffer and registers */
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if (!request_mem_region(frame_buffer_phys, 0x100000, "valkyriefb")) {
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kfree(p);
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return 0;
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}
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p->total_vram = 0x100000;
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p->frame_buffer_phys = frame_buffer_phys;
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p->frame_buffer = __ioremap(frame_buffer_phys, p->total_vram, flags);
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p->cmap_regs_phys = cmap_regs_phys;
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p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
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p->valkyrie_regs_phys = cmap_regs_phys+0x6000;
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p->valkyrie_regs = ioremap(p->valkyrie_regs_phys, 0x1000);
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err = -ENOMEM;
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if (p->frame_buffer == NULL || p->cmap_regs == NULL
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|| p->valkyrie_regs == NULL) {
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printk(KERN_ERR "valkyriefb: couldn't map resources\n");
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goto out_free;
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}
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valkyrie_choose_mode(p);
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mac_vmode_to_var(default_vmode, default_cmode, &p->info.var);
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valkyrie_init_info(&p->info, p);
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valkyrie_init_fix(&p->info.fix, p);
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if (valkyriefb_set_par(&p->info))
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/* "can't happen" */
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printk(KERN_ERR "valkyriefb: can't set default video mode\n");
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if ((err = register_framebuffer(&p->info)) != 0)
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goto out_free;
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printk(KERN_INFO "fb%d: valkyrie frame buffer device\n", p->info.node);
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return 0;
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out_free:
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if (p->frame_buffer)
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iounmap(p->frame_buffer);
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if (p->cmap_regs)
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iounmap(p->cmap_regs);
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if (p->valkyrie_regs)
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iounmap(p->valkyrie_regs);
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kfree(p);
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return err;
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}
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/*
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* Get the monitor sense value.
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*/
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static int read_valkyrie_sense(struct fb_info_valkyrie *p)
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{
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int sense, in;
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out_8(&p->valkyrie_regs->msense.r, 0); /* release all lines */
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__delay(20000);
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sense = ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x70) << 4;
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/* drive each sense line low in turn and collect the other 2 */
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out_8(&p->valkyrie_regs->msense.r, 4); /* drive A low */
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__delay(20000);
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sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x30);
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out_8(&p->valkyrie_regs->msense.r, 2); /* drive B low */
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__delay(20000);
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sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x40) >> 3;
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sense |= (in & 0x10) >> 2;
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out_8(&p->valkyrie_regs->msense.r, 1); /* drive C low */
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__delay(20000);
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sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x60) >> 5;
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out_8(&p->valkyrie_regs->msense.r, 7);
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return sense;
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}
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/*
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* This routine takes a user-supplied var,
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* and picks the best vmode/cmode from it.
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*/
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/* [bkn] I did a major overhaul of this function.
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*
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* Much of the old code was "swiped by jonh from atyfb.c". Because
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* macmodes has mac_var_to_vmode, I felt that it would be better to
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* rework this function to use that, instead of reinventing the wheel to
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* add support for vmode 17. This was reinforced by the fact that
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* the previously swiped atyfb.c code is no longer there.
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*
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* So, I swiped and adapted platinum_var_to_par (from platinumfb.c), replacing
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* most, but not all, of the old code in the process. One side benefit of
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* swiping the platinumfb code is that we now have more comprehensible error
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* messages when a vmode/cmode switch fails. (Most of the error messages are
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* platinumfb.c, but I added two of my own, and I also changed some commas
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* into colons to make the messages more consistent with other Linux error
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* messages.) In addition, I think the new code *might* fix some vmode-
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* switching oddities, but I'm not sure.
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*
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* There may be some more opportunities for cleanup in here, but this is a
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* good start...
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*/
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static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
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struct fb_par_valkyrie *par, const struct fb_info *fb_info)
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{
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int vmode, cmode;
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struct valkyrie_regvals *init;
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struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) fb_info;
|
|
|
|
if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
|
|
printk(KERN_ERR "valkyriefb: can't do %dx%dx%d.\n",
|
|
var->xres, var->yres, var->bits_per_pixel);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Check if we know about the wanted video mode */
|
|
if (vmode < 1 || vmode > VMODE_MAX || !valkyrie_reg_init[vmode-1]) {
|
|
printk(KERN_ERR "valkyriefb: vmode %d not valid.\n", vmode);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cmode != CMODE_8 && cmode != CMODE_16) {
|
|
printk(KERN_ERR "valkyriefb: cmode %d not valid.\n", cmode);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (var->xres_virtual > var->xres || var->yres_virtual > var->yres
|
|
|| var->xoffset != 0 || var->yoffset != 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
init = valkyrie_reg_init[vmode-1];
|
|
if (init->pitch[cmode] == 0) {
|
|
printk(KERN_ERR "valkyriefb: vmode %d does not support "
|
|
"cmode %d.\n", vmode, cmode);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (valkyrie_vram_reqd(vmode, cmode) > p->total_vram) {
|
|
printk(KERN_ERR "valkyriefb: not enough ram for vmode %d, "
|
|
"cmode %d.\n", vmode, cmode);
|
|
return -EINVAL;
|
|
}
|
|
|
|
par->vmode = vmode;
|
|
par->cmode = cmode;
|
|
par->init = init;
|
|
par->xres = var->xres;
|
|
par->yres = var->yres;
|
|
par->vxres = par->xres;
|
|
par->vyres = par->yres;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p)
|
|
{
|
|
memset(fix, 0, sizeof(*fix));
|
|
strcpy(fix->id, "valkyrie");
|
|
fix->mmio_start = p->valkyrie_regs_phys;
|
|
fix->mmio_len = sizeof(struct valkyrie_regs);
|
|
fix->type = FB_TYPE_PACKED_PIXELS;
|
|
fix->smem_start = p->frame_buffer_phys + 0x1000;
|
|
fix->smem_len = p->total_vram;
|
|
|
|
fix->type_aux = 0;
|
|
fix->ywrapstep = 0;
|
|
fix->ypanstep = 0;
|
|
fix->xpanstep = 0;
|
|
|
|
}
|
|
|
|
/* Fix must already be inited above */
|
|
static void valkyrie_par_to_fix(struct fb_par_valkyrie *par,
|
|
struct fb_fix_screeninfo *fix)
|
|
{
|
|
fix->smem_len = valkyrie_vram_reqd(par->vmode, par->cmode);
|
|
fix->visual = (par->cmode == CMODE_8) ?
|
|
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
|
|
fix->line_length = par->vxres << par->cmode;
|
|
/* ywrapstep, xpanstep, ypanstep */
|
|
}
|
|
|
|
static void __init valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p)
|
|
{
|
|
info->fbops = &valkyriefb_ops;
|
|
info->screen_base = p->frame_buffer + 0x1000;
|
|
info->flags = FBINFO_DEFAULT;
|
|
info->pseudo_palette = p->pseudo_palette;
|
|
fb_alloc_cmap(&info->cmap, 256, 0);
|
|
info->par = &p->par;
|
|
}
|
|
|
|
|
|
/*
|
|
* Parse user speficied options (`video=valkyriefb:')
|
|
*/
|
|
int __init valkyriefb_setup(char *options)
|
|
{
|
|
char *this_opt;
|
|
|
|
if (!options || !*options)
|
|
return 0;
|
|
|
|
while ((this_opt = strsep(&options, ",")) != NULL) {
|
|
if (!strncmp(this_opt, "vmode:", 6)) {
|
|
int vmode = simple_strtoul(this_opt+6, NULL, 0);
|
|
if (vmode > 0 && vmode <= VMODE_MAX)
|
|
default_vmode = vmode;
|
|
}
|
|
else if (!strncmp(this_opt, "cmode:", 6)) {
|
|
int depth = simple_strtoul(this_opt+6, NULL, 0);
|
|
switch (depth) {
|
|
case 8:
|
|
default_cmode = CMODE_8;
|
|
break;
|
|
case 15:
|
|
case 16:
|
|
default_cmode = CMODE_16;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
module_init(valkyriefb_init);
|
|
MODULE_LICENSE("GPL");
|