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583 lines
16 KiB
583 lines
16 KiB
/* |
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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 <[email protected]> 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 <[email protected]>. |
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* |
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* Ported to m68k Macintosh by David Huggins-Daines <[email protected]> |
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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 <[email protected]> |
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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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|
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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/nvram.h> |
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#include <linux/adb.h> |
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#include <linux/cuda.h> |
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#ifdef CONFIG_MAC |
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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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|
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#include "macmodes.h" |
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#include "valkyriefb.h" |
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|
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static int default_vmode = VMODE_NVRAM; |
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static int default_cmode = CMODE_NVRAM; |
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|
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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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|
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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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|
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struct valkyrie_regs __iomem *valkyrie_regs; |
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unsigned long valkyrie_regs_phys; |
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|
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__u8 __iomem *frame_buffer; |
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unsigned long frame_buffer_phys; |
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|
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int sense; |
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unsigned long total_vram; |
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|
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u32 pseudo_palette[16]; |
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}; |
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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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|
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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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|
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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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|
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static int 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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|
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static const 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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|
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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 = |
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container_of(info, 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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|
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if ((err = valkyrie_var_to_par(&info->var, par, info))) |
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return err; |
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|
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valkyrie_par_to_fix(par, &info->fix); |
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|
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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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|
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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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|
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/* Turn on display */ |
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out_8(&valkyrie_regs->mode.r, init->mode); |
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|
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return 0; |
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} |
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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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|
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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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|
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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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/* |
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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 = |
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container_of(info, 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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|
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if (init == NULL) |
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return 1; |
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|
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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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|
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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 = |
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container_of(info, 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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|
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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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|
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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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|
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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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|
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return 0; |
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} |
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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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|
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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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|
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static void set_valkyrie_clock(unsigned char *params) |
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{ |
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#ifdef CONFIG_ADB_CUDA |
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struct adb_request req; |
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int i; |
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|
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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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|
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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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|
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/* Try to pick a video mode out of NVRAM if we have one. */ |
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#ifdef CONFIG_PPC_PMAC |
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if (IS_REACHABLE(CONFIG_NVRAM) && default_vmode == VMODE_NVRAM) |
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default_vmode = nvram_read_byte(NV_VMODE); |
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#endif |
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if (default_vmode <= 0 || default_vmode > VMODE_MAX || |
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!valkyrie_reg_init[default_vmode - 1]) { |
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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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} |
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|
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#ifdef CONFIG_PPC_PMAC |
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if (IS_REACHABLE(CONFIG_NVRAM) && 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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|
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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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|
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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; |
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int err; |
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char *option = NULL; |
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|
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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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|
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#ifdef CONFIG_MAC |
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if (!MACH_IS_MAC) |
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return -ENODEV; |
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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 -ENODEV; |
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|
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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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#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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|
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dp = of_find_node_by_name(NULL, "valkyrie"); |
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if (!dp) |
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return 0; |
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|
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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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|
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frame_buffer_phys = r.start; |
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cmap_regs_phys = r.start + 0x304000; |
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} |
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#endif /* ppc (!CONFIG_MAC) */ |
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|
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p = kzalloc(sizeof(*p), GFP_ATOMIC); |
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if (!p) |
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return -ENOMEM; |
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|
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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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#ifdef CONFIG_MAC |
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p->frame_buffer = ioremap(frame_buffer_phys, p->total_vram); |
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#else |
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p->frame_buffer = ioremap_wt(frame_buffer_phys, p->total_vram); |
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#endif |
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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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|
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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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err = valkyrie_init_info(&p->info, p); |
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if (err < 0) |
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goto out_free; |
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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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|
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if ((err = register_framebuffer(&p->info)) != 0) |
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goto out_cmap_free; |
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|
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fb_info(&p->info, "valkyrie frame buffer device\n"); |
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return 0; |
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|
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out_cmap_free: |
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fb_dealloc_cmap(&p->info.cmap); |
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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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/* |
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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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|
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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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|
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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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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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int vmode, cmode; |
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struct valkyrie_regvals *init; |
|
struct fb_info_valkyrie *p = |
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container_of(fb_info, struct fb_info_valkyrie, info); |
|
|
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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 int __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; |
|
info->par = &p->par; |
|
return fb_alloc_cmap(&info->cmap, 256, 0); |
|
} |
|
|
|
|
|
/* |
|
* Parse user specified 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");
|
|
|