/* * valkyriefb.c -- frame buffer device for the PowerMac 'valkyrie' display * * Created 8 August 1998 by * Martin Costabel <costabel@wanadoo.fr> and Kevin Schoedel * * Vmode-switching changes and vmode 15/17 modifications created 29 August * 1998 by Barry K. Nathan <barryn@pobox.com>. * * Ported to m68k Macintosh by David Huggins-Daines <dhd@debian.org> * * Derived directly from: * * controlfb.c -- frame buffer device for the PowerMac 'control' display * Copyright (C) 1998 Dan Jacobowitz <dan@debian.org> * * pmc-valkyrie.c -- Console support for PowerMac "valkyrie" display adaptor. * Copyright (C) 1997 Paul Mackerras. * * and indirectly: * * Frame buffer structure from: * drivers/video/chipsfb.c -- frame buffer device for * Chips & Technologies 65550 chip. * * Copyright (C) 1998 Paul Mackerras * * This file is derived from the Powermac "chips" driver: * Copyright (C) 1997 Fabio Riccardi. * And from the frame buffer device for Open Firmware-initialized devices: * Copyright (C) 1997 Geert Uytterhoeven. * * Hardware information from: * control.c: Console support for PowerMac "control" display adaptor. * Copyright (C) 1996 Paul Mackerras * * 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.
*/
/* * Blank the screen if blank_mode != 0, else unblank. If blank_mode == 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
*/ staticint valkyriefb_blank(int blank_mode, struct fb_info *info)
{ struct fb_info_valkyrie *p =
container_of(info, struct fb_info_valkyrie, info); struct fb_par_valkyrie *par = info->par; struct valkyrie_regvals *init = par->init;
if (init == NULL) return 1;
switch (blank_mode) { case FB_BLANK_UNBLANK: /* unblank */
out_8(&p->valkyrie_regs->mode.r, init->mode); break; case FB_BLANK_NORMAL: return 1; /* get caller to set CLUT to all black */ case FB_BLANK_VSYNC_SUSPEND: case FB_BLANK_HSYNC_SUSPEND: /* * [kps] Value extracted from MacOS. I don't know * whether this bit disables hsync or vsync, or * whether the hardware can do the other as well.
*/
out_8(&p->valkyrie_regs->mode.r, init->mode | 0x40); break; case FB_BLANK_POWERDOWN:
out_8(&p->valkyrie_regs->mode.r, 0x66); break;
} return 0;
}
if (regno > 255) return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
/* tell clut which address to fill */
out_8(&p->cmap_regs->addr, regno);
udelay(1); /* send one color channel at a time */
out_8(&cmap_regs->lut, red);
out_8(&cmap_regs->lut, green);
out_8(&cmap_regs->lut, blue);
for (i = 0; i < 3; ++i) {
cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
0x50, i + 1, params[i]); while (!req.complete)
cuda_poll();
} #endif
}
staticvoid __init valkyrie_choose_mode(struct fb_info_valkyrie *p)
{
p->sense = read_valkyrie_sense(p);
printk(KERN_INFO "Monitor sense value = 0x%x\n", p->sense);
/* Try to pick a video mode out of NVRAM if we have one. */ #ifdef CONFIG_PPC_PMAC if (IS_REACHABLE(CONFIG_NVRAM) && default_vmode == VMODE_NVRAM)
default_vmode = nvram_read_byte(NV_VMODE); #endif if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
!valkyrie_reg_init[default_vmode - 1]) {
default_vmode = mac_map_monitor_sense(p->sense); if (!valkyrie_reg_init[default_vmode - 1])
default_vmode = VMODE_640_480_67;
}
#ifdef CONFIG_PPC_PMAC if (IS_REACHABLE(CONFIG_NVRAM) && default_cmode == CMODE_NVRAM)
default_cmode = nvram_read_byte(NV_CMODE); #endif /* * Reduce the pixel size if we don't have enough VRAM or bandwidth.
*/ if (default_cmode < CMODE_8 || default_cmode > CMODE_16
|| valkyrie_reg_init[default_vmode-1]->pitch[default_cmode] == 0
|| valkyrie_vram_reqd(default_vmode, default_cmode) > p->total_vram)
default_cmode = CMODE_8;
printk(KERN_INFO "using video mode %d and color mode %d.\n",
default_vmode, default_cmode);
}
if (fb_get_options("valkyriefb", &option)) return -ENODEV;
valkyriefb_setup(option);
#ifdef CONFIG_MAC if (!MACH_IS_MAC) return -ENODEV; if (!(mac_bi_data.id == MAC_MODEL_Q630 /* I'm not sure about this one */
|| mac_bi_data.id == MAC_MODEL_P588)) return -ENODEV;
/* Hardcoded addresses... welcome to 68k Macintosh country :-) */
frame_buffer_phys = 0xf9000000;
cmap_regs_phys = 0x50f24000; #else/* ppc (!CONFIG_MAC) */
{ struct device_node *dp; struct resource r;
dp = of_find_node_by_name(NULL, "valkyrie"); if (!dp) return 0;
if (of_address_to_resource(dp, 0, &r)) {
printk(KERN_ERR "can't find address for valkyrie\n");
of_node_put(dp); return 0;
}
out_cmap_free:
fb_dealloc_cmap(&p->info.cmap);
out_free: if (p->frame_buffer)
iounmap(p->frame_buffer); if (p->cmap_regs)
iounmap(p->cmap_regs); if (p->valkyrie_regs)
iounmap(p->valkyrie_regs);
kfree(p); return err;
}
/* * Get the monitor sense value.
*/ staticint read_valkyrie_sense(struct fb_info_valkyrie *p)
{ int sense, in;
out_8(&p->valkyrie_regs->msense.r, 0); /* release all lines */
__delay(20000);
sense = ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x70) << 4; /* drive each sense line low in turn and collect the other 2 */
out_8(&p->valkyrie_regs->msense.r, 4); /* drive A low */
__delay(20000);
sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x30);
out_8(&p->valkyrie_regs->msense.r, 2); /* drive B low */
__delay(20000);
sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x40) >> 3;
sense |= (in & 0x10) >> 2;
out_8(&p->valkyrie_regs->msense.r, 1); /* drive C low */
__delay(20000);
sense |= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x60) >> 5;
out_8(&p->valkyrie_regs->msense.r, 7);
return sense;
}
/* * This routine takes a user-supplied var, * and picks the best vmode/cmode from it.
*/
/* [bkn] I did a major overhaul of this function. * * Much of the old code was "swiped by jonh from atyfb.c". Because * macmodes has mac_var_to_vmode, I felt that it would be better to * rework this function to use that, instead of reinventing the wheel to * add support for vmode 17. This was reinforced by the fact that * the previously swiped atyfb.c code is no longer there. * * So, I swiped and adapted platinum_var_to_par (from platinumfb.c), replacing * most, but not all, of the old code in the process. One side benefit of * swiping the platinumfb code is that we now have more comprehensible error * messages when a vmode/cmode switch fails. (Most of the error messages are * platinumfb.c, but I added two of my own, and I also changed some commas * into colons to make the messages more consistent with other Linux error * messages.) In addition, I think the new code *might* fix some vmode- * switching oddities, but I'm not sure. * * There may be some more opportunities for cleanup in here, but this is a * good start...
*/
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;
}
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