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/*
* platinumfb.c -- frame buffer device for the PowerMac 'platinum' display
*
* Copyright (C) 1998 Franz Sirl
*
* Frame buffer structure from:
* drivers/video/controlfb.c -- frame buffer device for
* Apple 'control' display chip.
* Copyright (C) 1998 Dan Jacobowitz
*
* Hardware information from:
* platinum.c: Console support for PowerMac "platinum" display adaptor.
* Copyright (C) 1996 Paul Mackerras and Mark Abene
*
* 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/pci.h>
#include <linux/nvram.h>
#ifdef CONFIG_FB_COMPAT_XPMAC
#include <asm/vc_ioctl.h>
#endif
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pgtable.h>
#include <video/fbcon.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
#include <video/fbcon-cfb32.h>
#include <video/macmodes.h>
#include "platinumfb.h"
static char fontname[40] __initdata = { 0 };
static int currcon = 0;
static int default_vmode = VMODE_NVRAM;
static int default_cmode = CMODE_NVRAM;
struct fb_par_platinum {
int vmode, cmode;
int xres, yres;
int vxres, vyres;
int xoffset, yoffset;
};
struct fb_info_platinum {
struct fb_info fb_info;
struct display disp;
struct fb_par_platinum default_par;
struct fb_par_platinum current_par;
struct {
__u8 red, green, blue;
} palette[256];
volatile struct cmap_regs *cmap_regs;
unsigned long cmap_regs_phys;
volatile struct platinum_regs *platinum_regs;
unsigned long platinum_regs_phys;
__u8 *frame_buffer;
volatile __u8 *base_frame_buffer;
unsigned long frame_buffer_phys;
unsigned long total_vram;
int clktype;
int dactype;
union {
#ifdef FBCON_HAS_CFB16
u16 cfb16[16];
#endif
#ifdef FBCON_HAS_CFB32
u32 cfb32[16];
#endif
} fbcon_cmap;
};
/*
* Frame buffer device API
*/
static int platinum_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *fb);
static int platinum_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *fb);
static int platinum_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *fb);
static int platinum_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info);
static int platinum_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info);
/*
* Interface to the low level console driver
*/
static int platinum_switch(int con, struct fb_info *fb);
static int platinum_updatevar(int con, struct fb_info *fb);
static void platinum_blank(int blank, struct fb_info *fb);
/*
* internal functions
*/
static void platinum_of_init(struct device_node *dp);
static inline int platinum_vram_reqd(const struct fb_info_platinum* info,
int video_mode,
int color_mode);
static int read_platinum_sense(struct fb_info_platinum *info);
static void set_platinum_clock(struct fb_info_platinum *info);
static void platinum_set_par(const struct fb_par_platinum *par, struct fb_info_platinum *info);
static int platinum_par_to_var(struct fb_var_screeninfo *var,
const struct fb_par_platinum *par,
const struct fb_info_platinum *info);
static int platinum_var_to_par(const struct fb_var_screeninfo *var,
struct fb_par_platinum *par,
const struct fb_info_platinum *info);
static int platinum_encode_fix(struct fb_fix_screeninfo *fix,
const struct fb_par_platinum *par,
const struct fb_info_platinum *info);
static void platinum_set_dispsw(struct display *disp,
struct fb_info_platinum *info, int cmode,
int accel);
static int platinum_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
u_int *transp, struct fb_info *fb);
static int platinum_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *fb);
static void do_install_cmap(int con, struct fb_info *info);
/*
* Interface used by the world
*/
int platinum_init(void);
int platinum_setup(char*);
static struct fb_ops platinumfb_ops = {
owner: THIS_MODULE,
fb_get_fix: platinum_get_fix,
fb_get_var: platinum_get_var,
fb_set_var: platinum_set_var,
fb_get_cmap: platinum_get_cmap,
fb_set_cmap: platinum_set_cmap,
};
static int platinum_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *fb)
{
const struct fb_info_platinum *info = (struct fb_info_platinum *)fb;
struct fb_par_platinum par;
if (con == -1)
par = info->default_par;
else
platinum_var_to_par(&fb_display[con].var, &par, info);
platinum_encode_fix(fix, &par, info);
return 0;
}
static int platinum_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *fb)
{
const struct fb_info_platinum *info = (struct fb_info_platinum *)fb;
if (con == -1)
platinum_par_to_var(var, &info->default_par, info);
else
*var = fb_display[con].var;
return 0;
}
static void platinum_set_dispsw(struct display *disp,
struct fb_info_platinum *info, int cmode,
int accel)
{
switch(cmode) {
#ifdef FBCON_HAS_CFB8
case CMODE_8:
disp->dispsw = &fbcon_cfb8;
break;
#endif
#ifdef FBCON_HAS_CFB16
case CMODE_16:
disp->dispsw = &fbcon_cfb16;
disp->dispsw_data = info->fbcon_cmap.cfb16;
break;
#endif
#ifdef FBCON_HAS_CFB32
case CMODE_32:
disp->dispsw = &fbcon_cfb32;
disp->dispsw_data = info->fbcon_cmap.cfb32;
break;
#endif
default:
disp->dispsw = &fbcon_dummy;
break;
}
}
static int platinum_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *fb)
{
struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
struct fb_par_platinum par;
struct display *display;
int oldxres, oldyres, oldvxres, oldvyres, oldbpp, err;
int activate = var->activate;
struct platinum_regvals *init;
display = (con >= 0) ? &fb_display[con] : fb->disp;
if((err = platinum_var_to_par(var, &par, info))) {
printk(KERN_ERR "platinum_set_var: error calling platinum_var_to_par: %d.\n", err);
return err;
}
platinum_par_to_var(var, &par, info);
if ((activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW) {
printk(KERN_INFO "platinum_set_var: Not activating.\n");
return 0;
}
init = platinum_reg_init[par.vmode-1];
oldxres = display->var.xres;
oldyres = display->var.yres;
oldvxres = display->var.xres_virtual;
oldvyres = display->var.yres_virtual;
oldbpp = display->var.bits_per_pixel;
display->var = *var;
if (oldxres != var->xres || oldyres != var->yres ||
oldvxres != var->xres_virtual || oldyres != var->yres_virtual ||
oldbpp != var->bits_per_pixel) {
struct fb_fix_screeninfo fix;
platinum_encode_fix(&fix, &par, info);
display->screen_base = (char *) info->frame_buffer + init->fb_offset + 0x20;
display->visual = fix.visual;
display->type = fix.type;
display->type_aux = fix.type_aux;
display->ypanstep = fix.ypanstep;
display->ywrapstep = fix.ywrapstep;
display->line_length = fix.line_length;
display->can_soft_blank = 1;
display->inverse = 0;
platinum_set_dispsw(display, info, par.cmode, 0);
display->scrollmode = SCROLL_YREDRAW;
if (info->fb_info.changevar)
(*info->fb_info.changevar)(con);
}
if (!info->fb_info.display_fg ||
info->fb_info.display_fg->vc_num == con)
platinum_set_par(&par, info);
if (oldbpp != var->bits_per_pixel) {
if ((err = fb_alloc_cmap(&display->cmap, 0, 0)))
return err;
do_install_cmap(con, &info->fb_info);
}
return 0;
}
static int platinum_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
if (!info->display_fg ||
info->display_fg->vc_num == con) /* current console? */
return fb_get_cmap(cmap, kspc, platinum_getcolreg, info);
if (fb_display[con].cmap.len) /* non default colormap? */
fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
else {
int size = fb_display[con].var.bits_per_pixel == 16 ? 32 : 256;
fb_copy_cmap(fb_default_cmap(size), cmap, kspc ? 0 : 2);
}
return 0;
}
static int platinum_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
int err;
struct display *disp;
if (con >= 0)
disp = &fb_display[con];
else
disp = info->disp;
if (!disp->cmap.len) { /* no colormap allocated? */
int size = disp->var.bits_per_pixel == 16 ? 32 : 256;
if ((err = fb_alloc_cmap(&disp->cmap, size, 0)))
return err;
}
if (!info->display_fg ||
info->display_fg->vc_num == con) /* current console? */
return fb_set_cmap(cmap, kspc, platinum_setcolreg, info);
else
fb_copy_cmap(cmap, &disp->cmap, kspc ? 0 : 1);
return 0;
}
static int platinum_switch(int con, struct fb_info *fb)
{
struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
struct fb_par_platinum par;
if (fb_display[currcon].cmap.len)
fb_get_cmap(&fb_display[currcon].cmap, 1, platinum_getcolreg,
fb);
currcon = con;
platinum_var_to_par(&fb_display[con].var, &par, info);
platinum_set_par(&par, info);
platinum_set_dispsw(&fb_display[con], info, par.cmode, 0);
do_install_cmap(con, fb);
return 1;
}
static int platinum_updatevar(int con, struct fb_info *fb)
{
printk(KERN_ERR "platinum_updatevar is doing nothing yet.\n");
return 0;
}
static void platinum_blank(int blank, struct fb_info *fb)
{
/*
* Blank the screen if blank_mode != 0, else unblank. If blank == NULL
* then the caller blanks by setting the CLUT (Color Look Up Table) to all
* black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
* to e.g. a video mode which doesn't support it. Implements VESA suspend
* and powerdown modes on hardware that supports disabling hsync/vsync:
* blank_mode == 2: suspend vsync
* blank_mode == 3: suspend hsync
* blank_mode == 4: powerdown
*/
/* [danj] I think there's something fishy about those constants... */
/*
struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
int ctrl;
ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33;
if (blank)
--blank_mode;
if (blank & VESA_VSYNC_SUSPEND)
ctrl &= ~3;
if (blank & VESA_HSYNC_SUSPEND)
ctrl &= ~0x30;
out_le32(&info->platinum_regs->ctrl.r, ctrl);
*/
/* TODO: Figure out how the heck to powerdown this thing! */
return;
}
static int platinum_getcolreg(u_int regno, u_int *red, u_int *green,
u_int *blue, u_int *transp, struct fb_info *fb)
{
struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
if (regno > 255)
return 1;
*red = (info->palette[regno].red<<8) | info->palette[regno].red;
*green = (info->palette[regno].green<<8) | info->palette[regno].green;
*blue = (info->palette[regno].blue<<8) | info->palette[regno].blue;
*transp = 0;
return 0;
}
static int platinum_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *fb)
{
struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
volatile struct cmap_regs *cmap_regs = info->cmap_regs;
if (regno > 255)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
info->palette[regno].red = red;
info->palette[regno].green = green;
info->palette[regno].blue = blue;
out_8(&cmap_regs->addr, regno); /* tell clut what addr to fill */
out_8(&cmap_regs->lut, red); /* send one color channel at */
out_8(&cmap_regs->lut, green); /* a time... */
out_8(&cmap_regs->lut, blue);
if(regno < 16) {
#ifdef FBCON_HAS_CFB16
info->fbcon_cmap.cfb16[regno] = (regno << 10) | (regno << 5) | (regno << 0);
#endif
#ifdef FBCON_HAS_CFB32
info->fbcon_cmap.cfb32[regno] = (regno << 24) | (regno << 16) | (regno << 8) | regno;
#endif
}
return 0;
}
static void do_install_cmap(int con, struct fb_info *info)
{
if (con != currcon)
return;
if (fb_display[con].cmap.len)
fb_set_cmap(&fb_display[con].cmap, 1, platinum_setcolreg,
info);
else {
int size = fb_display[con].var.bits_per_pixel == 16 ? 32 : 256;
fb_set_cmap(fb_default_cmap(size), 1, platinum_setcolreg,
info);
}
}
static inline int platinum_vram_reqd(const struct fb_info_platinum *info, int video_mode, int color_mode)
{
unsigned int pitch =
(vmode_attrs[video_mode-1].hres * (1<<color_mode) + 0x20);
fixup_pitch(pitch, info, color_mode);
return vmode_attrs[video_mode-1].vres * pitch;
}
#define STORE_D2(a, d) { \
out_8(&cmap_regs->addr, (a+32)); \
out_8(&cmap_regs->d2, (d)); \
}
static void set_platinum_clock(struct fb_info_platinum *info)
{
volatile struct cmap_regs *cmap_regs = info->cmap_regs;
struct platinum_regvals *init;
init = platinum_reg_init[info->current_par.vmode-1];
STORE_D2(6, 0xc6);
out_8(&cmap_regs->addr,3+32);
if (in_8(&cmap_regs->d2) == 2) {
STORE_D2(7, init->clock_params[info->clktype][0]);
STORE_D2(8, init->clock_params[info->clktype][1]);
STORE_D2(3, 3);
} else {
STORE_D2(4, init->clock_params[info->clktype][0]);
STORE_D2(5, init->clock_params[info->clktype][1]);
STORE_D2(3, 2);
}
__delay(5000);
STORE_D2(9, 0xa6);
}
/* Now how about actually saying, Make it so! */
/* Some things in here probably don't need to be done each time. */
static void platinum_set_par(const struct fb_par_platinum *par, struct fb_info_platinum *info)
{
volatile struct platinum_regs *platinum_regs = info->platinum_regs;
volatile struct cmap_regs *cmap_regs = info->cmap_regs;
struct platinum_regvals *init;
int i;
int vmode, cmode, pitch;
info->current_par = *par;
vmode = par->vmode;
cmode = par->cmode;
init = platinum_reg_init[vmode - 1];
/* Initialize display timing registers */
out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
for (i = 0; i < 26; ++i)
out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
out_be32(&platinum_regs->reg[26+32].r, (info->total_vram == 0x100000 ?
init->offset[cmode] + 4 - cmode :
init->offset[cmode]));
out_be32(&platinum_regs->reg[16].r, (unsigned) info->frame_buffer_phys+init->fb_offset+0x10);
pitch = init->pitch[cmode];
fixup_pitch(pitch, info, cmode);
out_be32(&platinum_regs->reg[18].r, pitch);
out_be32(&platinum_regs->reg[19].r, (info->total_vram == 0x100000 ?
init->mode[cmode+1] :
init->mode[cmode]));
out_be32(&platinum_regs->reg[20].r, (info->total_vram == 0x100000 ? 0x11 : 0x1011));
out_be32(&platinum_regs->reg[21].r, 0x100);
out_be32(&platinum_regs->reg[22].r, 1);
out_be32(&platinum_regs->reg[23].r, 1);
out_be32(&platinum_regs->reg[26].r, 0xc00);
out_be32(&platinum_regs->reg[27].r, 0x235);
/* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
STORE_D2(0, (info->total_vram == 0x100000 ?
init->dacula_ctrl[cmode] & 0xf :
init->dacula_ctrl[cmode]));
STORE_D2(1, 4);
STORE_D2(2, 0);
set_platinum_clock(info);
out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
#ifdef CONFIG_FB_COMPAT_XPMAC
if (console_fb_info == &info->fb_info) {
display_info.height = par->yres;
display_info.width = par->xres;
display_info.depth = ( (cmode == CMODE_32) ? 32 :
((cmode == CMODE_16) ? 16 : 8));
display_info.pitch = vmode_attrs[vmode-1].hres * (1<<cmode) + 0x20;
fixup_pitch(display_info.pitch, info, cmode);
display_info.mode = vmode;
strncpy(display_info.name, "platinum",
sizeof(display_info.name));
display_info.fb_address = info->frame_buffer_phys + init->fb_offset + 0x20;
display_info.cmap_adr_address = info->cmap_regs_phys;
display_info.cmap_data_address = info->cmap_regs_phys + 0x30;
display_info.disp_reg_address = info->platinum_regs_phys;
}
#endif /* CONFIG_FB_COMPAT_XPMAC */
}
static int __init init_platinum(struct fb_info_platinum *info)
{
struct fb_var_screeninfo var;
struct display *disp;
int sense;
int j,k;
sense = read_platinum_sense(info);
printk(KERN_INFO "Monitor sense value = 0x%x, ", sense);
#ifdef CONFIG_NVRAM
if (default_vmode == VMODE_NVRAM) {
default_vmode = nvram_read_byte(NV_VMODE);
if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
!platinum_reg_init[default_vmode-1])
default_vmode = VMODE_CHOOSE;
}
if (default_cmode == CMODE_NVRAM)
default_cmode = nvram_read_byte(NV_CMODE);
#endif
if (default_vmode == VMODE_CHOOSE)
default_vmode = mac_map_monitor_sense(sense);
if (default_vmode <= 0 || default_vmode > VMODE_MAX)
default_vmode = VMODE_640_480_60;
if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
default_cmode = CMODE_8;
/*
* Reduce the pixel size if we don't have enough VRAM.
*/
while(default_cmode > CMODE_8 && platinum_vram_reqd(info, default_vmode, default_cmode)
> info->total_vram)
default_cmode--;
printk("using video mode %d and color mode %d.\n", default_vmode, default_cmode);
mac_vmode_to_var(default_vmode, default_cmode, &var);
if (platinum_var_to_par(&var, &info->default_par, info)) {
printk(KERN_ERR "platinumfb: can't set default video mode\n");
return 0;
}
disp = &info->disp;
strcpy(info->fb_info.modename, "platinum");
info->fb_info.node = -1;
info->fb_info.fbops = &platinumfb_ops;
info->fb_info.disp = disp;
strcpy(info->fb_info.fontname, fontname);
info->fb_info.changevar = NULL;
info->fb_info.switch_con = &platinum_switch;
info->fb_info.updatevar = &platinum_updatevar;
info->fb_info.blank = &platinum_blank;
info->fb_info.flags = FBINFO_FLAG_DEFAULT;
for (j = 0; j < 16; j++) {
k = color_table[j];
info->palette[j].red = default_red[k];
info->palette[j].green = default_grn[k];
info->palette[j].blue = default_blu[k];
}
platinum_set_var(&var, -1, &info->fb_info);
if (register_framebuffer(&info->fb_info) < 0)
return 0;
printk(KERN_INFO "fb%d: platinum frame buffer device\n",
GET_FB_IDX(info->fb_info.node));
return 1;
}
int __init platinum_init(void)
{
struct device_node *dp;
dp = find_devices("platinum");
if (dp != 0)
platinum_of_init(dp);
return 0;
}
#ifdef __powerpc__
#define invalidate_cache(addr) \
asm volatile("eieio; dcbf 0,%1" \
: "=m" (*(addr)) : "r" (addr) : "memory");
#else
#define invalidate_cache(addr)
#endif
static void __init platinum_of_init(struct device_node *dp)
{
struct fb_info_platinum *info;
unsigned long addr, size;
volatile __u8 *fbuffer;
int i, bank0, bank1, bank2, bank3;
if(dp->n_addrs != 2) {
printk(KERN_ERR "expecting 2 address for platinum (got %d)", dp->n_addrs);
return;
}
info = kmalloc(sizeof(*info), GFP_ATOMIC);
if (info == 0)
return;
memset(info, 0, sizeof(*info));
/* Map in frame buffer and registers */
for (i = 0; i < dp->n_addrs; ++i) {
addr = dp->addrs[i].address;
size = dp->addrs[i].size;
/* Let's assume we can request either all or nothing */
if (!request_mem_region(addr, size, "platinumfb")) {
kfree(info);
return;
}
if (size >= 0x400000) {
/* frame buffer - map only 4MB */
info->frame_buffer_phys = addr;
info->frame_buffer = __ioremap(addr, 0x400000, _PAGE_WRITETHRU);
info->base_frame_buffer = info->frame_buffer;
} else {
/* registers */
info->platinum_regs_phys = addr;
info->platinum_regs = ioremap(addr, size);
}
}
info->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */
request_mem_region(info->cmap_regs_phys, 0x1000, "platinumfb cmap");
info->cmap_regs = ioremap(info->cmap_regs_phys, 0x1000);
/* Grok total video ram */
out_be32(&info->platinum_regs->reg[16].r, (unsigned)info->frame_buffer_phys);
out_be32(&info->platinum_regs->reg[20].r, 0x1011); /* select max vram */
out_be32(&info->platinum_regs->reg[24].r, 0); /* switch in vram */
fbuffer = info->base_frame_buffer;
fbuffer[0x100000] = 0x34;
fbuffer[0x100008] = 0x0;
invalidate_cache(&fbuffer[0x100000]);
fbuffer[0x200000] = 0x56;
fbuffer[0x200008] = 0x0;
invalidate_cache(&fbuffer[0x200000]);
fbuffer[0x300000] = 0x78;
fbuffer[0x300008] = 0x0;
invalidate_cache(&fbuffer[0x300000]);
bank0 = 1; /* builtin 1MB vram, always there */
bank1 = fbuffer[0x100000] == 0x34;
bank2 = fbuffer[0x200000] == 0x56;
bank3 = fbuffer[0x300000] == 0x78;
info->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
printk(KERN_INFO "Total VRAM = %dMB %d%d%d%d\n", (int) (info->total_vram / 1024 / 1024), bank3, bank2, bank1, bank0);
/*
* Try to determine whether we have an old or a new DACula.
*/
out_8(&info->cmap_regs->addr, 0x40);
info->dactype = in_8(&info->cmap_regs->d2);
switch (info->dactype) {
case 0x3c:
info->clktype = 1;
break;
case 0x84:
info->clktype = 0;
break;
default:
info->clktype = 0;
printk(KERN_INFO "Unknown DACula type: %x\n", info->dactype);
break;
}
if (!init_platinum(info)) {
kfree(info);
return;
}
#ifdef CONFIG_FB_COMPAT_XPMAC
if (!console_fb_info)
console_fb_info = &info->fb_info;
#endif
}
/*
* Get the monitor sense value.
* Note that this can be called before calibrate_delay,
* so we can't use udelay.
*/
static int read_platinum_sense(struct fb_info_platinum *info)
{
volatile struct platinum_regs *platinum_regs = info->platinum_regs;
int sense;
out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
__delay(2000);
sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
/* drive each sense line low in turn and collect the other 2 */
out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
__delay(2000);
sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
__delay(2000);
sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
__delay(2000);
sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
return sense;
}
/* This routine takes a user-supplied var, and picks the best vmode/cmode from it. */
static int platinum_var_to_par(const struct fb_var_screeninfo *var,
struct fb_par_platinum *par,
const struct fb_info_platinum *info)
{
if(mac_var_to_vmode(var, &par->vmode, &par->cmode) != 0) {
printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
return -EINVAL;
}
if(!platinum_reg_init[par->vmode-1]) {
printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", par->vmode);
return -EINVAL;
}
if (platinum_vram_reqd(info, par->vmode, par->cmode) > info->total_vram) {
printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", par->vmode, par->cmode);
return -EINVAL;
}
par->xres = vmode_attrs[par->vmode-1].hres;
par->yres = vmode_attrs[par->vmode-1].vres;
par->xoffset = 0;
par->yoffset = 0;
par->vxres = par->xres;
par->vyres = par->yres;
return 0;
}
static int platinum_par_to_var(struct fb_var_screeninfo *var,
const struct fb_par_platinum *par,
const struct fb_info_platinum *info)
{
return mac_vmode_to_var(par->vmode, par->cmode, var);
}
static int platinum_encode_fix(struct fb_fix_screeninfo *fix,
const struct fb_par_platinum *par,
const struct fb_info_platinum *info)
{
struct platinum_regvals *init;
init = platinum_reg_init[par->vmode-1];
memset(fix, 0, sizeof(*fix));
strcpy(fix->id, "platinum");
fix->smem_start = (info->frame_buffer_phys) + init->fb_offset + 0x20;
fix->smem_len = (u32) info->total_vram;
fix->mmio_start = (info->platinum_regs_phys);
fix->mmio_len = 0x1000;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
fix->ywrapstep = 0;
fix->xpanstep = 0;
fix->ypanstep = 0;
fix->visual = (par->cmode == CMODE_8) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
fix->line_length = vmode_attrs[par->vmode-1].hres * (1<<par->cmode) + 0x20;
fixup_pitch(fix->line_length, info, par->cmode);
return 0;
}
/*
* Parse user speficied options (`video=platinumfb:')
*/
int __init platinum_setup(char *options)
{
char *this_opt;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!strncmp(this_opt, "font:", 5)) {
char *p;
int i;
p = this_opt + 5;
for (i = 0; i < sizeof(fontname) - 1; i++)
if (!*p || *p == ' ' || *p == ',')
break;
memcpy(fontname, this_opt + 5, i);
fontname[i] = 0;
}
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 0:
case 8:
default_cmode = CMODE_8;
break;
case 15:
case 16:
default_cmode = CMODE_16;
break;
case 24:
case 32:
default_cmode = CMODE_32;
break;
}
}
}
return 0;
}
MODULE_LICENSE("GPL");
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