[linux.git] / drivers / video / valkyriefb.c

/*
 *  valkyriefb.c -- frame buffer device for the PowerMac 'valkyrie' display
 *
 *  Created 8 August 1998 by 
 *  Martin Costabel <[email protected]> and Kevin Schoedel
 *
 *  Vmode-switching changes and vmode 15/17 modifications created 29 August
 *  1998 by Barry K. Nathan <[email protected]>.
 *
 *  Ported to m68k Macintosh by David Huggins-Daines <[email protected]>
 *
 *  Derived directly from:
 *
 *   controlfb.c -- frame buffer device for the PowerMac 'control' display
 *   Copyright (C) 1998 Dan Jacobowitz <[email protected]>
 *
 *   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.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.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/nvram.h>
#include <linux/adb.h>
#include <linux/cuda.h>
#include <asm/io.h>
#ifdef CONFIG_MAC
#include <asm/bootinfo.h>
#include <asm/macintosh.h>
#else
#include <asm/prom.h>
#endif
#include <asm/pgtable.h>

#include "macmodes.h"
#include "valkyriefb.h"

#ifdef CONFIG_MAC
/* We don't yet have functions to read the PRAM... perhaps we can
   adapt them from the PPC code? */
static int default_vmode = VMODE_CHOOSE;
static int default_cmode = CMODE_8;
#else
static int default_vmode = VMODE_NVRAM;
static int default_cmode = CMODE_NVRAM;
#endif

struct fb_par_valkyrie {
	int	vmode, cmode;
	int	xres, yres;
	int	vxres, vyres;
	struct valkyrie_regvals *init;
};

struct fb_info_valkyrie {
	struct fb_info		info;
	struct fb_par_valkyrie	par;
	struct cmap_regs	__iomem *cmap_regs;
	unsigned long		cmap_regs_phys;
	
	struct valkyrie_regs	__iomem *valkyrie_regs;
	unsigned long		valkyrie_regs_phys;
	
	__u8			__iomem *frame_buffer;
	unsigned long		frame_buffer_phys;
	
	int			sense;
	unsigned long		total_vram;

	u32			pseudo_palette[16];
};

/*
 * Exported functions
 */
int valkyriefb_init(void);
int valkyriefb_setup(char*);

static int valkyriefb_check_var(struct fb_var_screeninfo *var,
				struct fb_info *info);
static int valkyriefb_set_par(struct fb_info *info);
static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
			     u_int transp, struct fb_info *info);
static int valkyriefb_blank(int blank_mode, struct fb_info *info);

static int read_valkyrie_sense(struct fb_info_valkyrie *p);
static void set_valkyrie_clock(unsigned char *params);
static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
	struct fb_par_valkyrie *par, const struct fb_info *fb_info);

static int valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p);
static void valkyrie_par_to_fix(struct fb_par_valkyrie *par, struct fb_fix_screeninfo *fix);
static void valkyrie_init_fix(struct fb_fix_screeninfo *fix, struct fb_info_valkyrie *p);

static struct fb_ops valkyriefb_ops = {
	.owner =	THIS_MODULE,
	.fb_check_var =	valkyriefb_check_var,
	.fb_set_par =	valkyriefb_set_par,
	.fb_setcolreg =	valkyriefb_setcolreg,
	.fb_blank =	valkyriefb_blank,
	.fb_fillrect	= cfb_fillrect,
	.fb_copyarea	= cfb_copyarea,
	.fb_imageblit	= cfb_imageblit,
};

/* Sets the video mode according to info->var */
static int valkyriefb_set_par(struct fb_info *info)
{
	struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
	volatile struct valkyrie_regs __iomem *valkyrie_regs = p->valkyrie_regs;
	struct fb_par_valkyrie *par = info->par;
	struct valkyrie_regvals	*init;
	int err;

	if ((err = valkyrie_var_to_par(&info->var, par, info)))
		return err;

	valkyrie_par_to_fix(par, &info->fix);

	/* Reset the valkyrie */
	out_8(&valkyrie_regs->status.r, 0);
	udelay(100);

	/* Initialize display timing registers */
	init = par->init;
	out_8(&valkyrie_regs->mode.r, init->mode | 0x80);
	out_8(&valkyrie_regs->depth.r, par->cmode + 3);
	set_valkyrie_clock(init->clock_params);
	udelay(100);

	/* Turn on display */
	out_8(&valkyrie_regs->mode.r, init->mode);

	return 0;
}

static inline int valkyrie_par_to_var(struct fb_par_valkyrie *par,
				      struct fb_var_screeninfo *var)
{
	return mac_vmode_to_var(par->vmode, par->cmode, var);
}

static int
valkyriefb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	int err;
	struct fb_par_valkyrie par;

	if ((err = valkyrie_var_to_par(var, &par, info)))
		return err;
	valkyrie_par_to_var(&par, var);
	return 0;
}

/*
 *  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
 */
static int valkyriefb_blank(int blank_mode, struct fb_info *info)
{
	struct fb_info_valkyrie *p = (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;
}

static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
			     u_int transp, struct fb_info *info)
{
	struct fb_info_valkyrie *p = (struct fb_info_valkyrie *) info;
	volatile struct cmap_regs __iomem *cmap_regs = p->cmap_regs;
	struct fb_par_valkyrie *par = info->par;

	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);

	if (regno < 16 && par->cmode == CMODE_16)
		((u32 *)info->pseudo_palette)[regno] =
			(regno << 10) | (regno << 5) | regno;

	return 0;
}

static inline int valkyrie_vram_reqd(int video_mode, int color_mode)
{
	int pitch;
	struct valkyrie_regvals *init = valkyrie_reg_init[video_mode-1];
	
	if ((pitch = init->pitch[color_mode]) == 0)
		pitch = 2 * init->pitch[0];
	return init->vres * pitch;
}

static void set_valkyrie_clock(unsigned char *params)
{
	struct adb_request req;
	int i;

#ifdef CONFIG_ADB_CUDA
	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
}

static void __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. */
#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
	if (default_vmode == VMODE_NVRAM) {
		default_vmode = nvram_read_byte(NV_VMODE);
		if (default_vmode <= 0
		 || default_vmode > VMODE_MAX
		 || !valkyrie_reg_init[default_vmode - 1])
			default_vmode = VMODE_CHOOSE;
	}
#endif
	if (default_vmode == VMODE_CHOOSE)
		default_vmode = mac_map_monitor_sense(p->sense);
	if (!valkyrie_reg_init[default_vmode - 1])
		default_vmode = VMODE_640_480_67;
#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
	if (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);
}

int __init valkyriefb_init(void)
{
	struct fb_info_valkyrie	*p;
	unsigned long frame_buffer_phys, cmap_regs_phys, flags;
	int err;
	char *option = NULL;

	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;
	flags = IOMAP_NOCACHE_SER; /* IOMAP_WRITETHROUGH?? */
#else /* ppc (!CONFIG_MAC) */
	{
		struct device_node *dp;
		struct resource r;

		dp = of_find_node_by_name(NULL, "valkyrie");
		if (dp == 0)
			return 0;

		if (of_address_to_resource(dp, 0, &r)) {
			printk(KERN_ERR "can't find address for valkyrie\n");
			return 0;
		}

		frame_buffer_phys = r.start;
		cmap_regs_phys = r.start + 0x304000;
		flags = _PAGE_WRITETHRU;
	}
#endif /* ppc (!CONFIG_MAC) */

	p = kzalloc(sizeof(*p), GFP_ATOMIC);
	if (p == 0)
		return -ENOMEM;

	/* Map in frame buffer and registers */
	if (!request_mem_region(frame_buffer_phys, 0x100000, "valkyriefb")) {
		kfree(p);
		return 0;
	}
	p->total_vram = 0x100000;
	p->frame_buffer_phys = frame_buffer_phys;
	p->frame_buffer = __ioremap(frame_buffer_phys, p->total_vram, flags);
	p->cmap_regs_phys = cmap_regs_phys;
	p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
	p->valkyrie_regs_phys = cmap_regs_phys+0x6000;
	p->valkyrie_regs = ioremap(p->valkyrie_regs_phys, 0x1000);
	err = -ENOMEM;
	if (p->frame_buffer == NULL || p->cmap_regs == NULL
	    || p->valkyrie_regs == NULL) {
		printk(KERN_ERR "valkyriefb: couldn't map resources\n");
		goto out_free;
	}

	valkyrie_choose_mode(p);
	mac_vmode_to_var(default_vmode, default_cmode, &p->info.var);
	err = valkyrie_init_info(&p->info, p);
	if (err < 0)
		goto out_free;
	valkyrie_init_fix(&p->info.fix, p);
	if (valkyriefb_set_par(&p->info))
		/* "can't happen" */
		printk(KERN_ERR "valkyriefb: can't set default video mode\n");

	if ((err = register_framebuffer(&p->info)) != 0)
		goto out_cmap_free;

	printk(KERN_INFO "fb%d: valkyrie frame buffer device\n", p->info.node);
	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.
 */
static int 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...
 */

static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
	struct fb_par_valkyrie *par, const struct fb_info *fb_info)
{
	int vmode, cmode;
	struct valkyrie_regvals *init;
	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 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");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* valkyriefb.c -- frame buffer device for the PowerMac 'valkyrie' display
	3	*
	4	* Created 8 August 1998 by
	5	* Martin Costabel <[email protected]> and Kevin Schoedel
	6	*
	7	* Vmode-switching changes and vmode 15/17 modifications created 29 August
	8	* 1998 by Barry K. Nathan <[email protected]>.
	9	*
	10	* Ported to m68k Macintosh by David Huggins-Daines <[email protected]>
	11	*
	12	* Derived directly from:
	13	*
	14	* controlfb.c -- frame buffer device for the PowerMac 'control' display
	15	* Copyright (C) 1998 Dan Jacobowitz <[email protected]>
	16	*
	17	* pmc-valkyrie.c -- Console support for PowerMac "valkyrie" display adaptor.
	18	* Copyright (C) 1997 Paul Mackerras.
	19	*
	20	* and indirectly:
	21	*
	22	* Frame buffer structure from:
	23	* drivers/video/chipsfb.c -- frame buffer device for
	24	* Chips & Technologies 65550 chip.
	25	*
	26	* Copyright (C) 1998 Paul Mackerras
	27	*
	28	* This file is derived from the Powermac "chips" driver:
	29	* Copyright (C) 1997 Fabio Riccardi.
	30	* And from the frame buffer device for Open Firmware-initialized devices:
	31	* Copyright (C) 1997 Geert Uytterhoeven.
	32	*
	33	* Hardware information from:
	34	* control.c: Console support for PowerMac "control" display adaptor.
	35	* Copyright (C) 1996 Paul Mackerras
	36	*
	37	* This file is subject to the terms and conditions of the GNU General Public
	38	* License. See the file COPYING in the main directory of this archive for
	39	* more details.
	40	*/
	41
1da177e4 LT	42	#include <linux/module.h>
	43	#include <linux/kernel.h>
	44	#include <linux/errno.h>
	45	#include <linux/string.h>
	46	#include <linux/mm.h>
1da177e4 LT	47	#include <linux/slab.h>
	48	#include <linux/vmalloc.h>
	49	#include <linux/delay.h>
	50	#include <linux/interrupt.h>
	51	#include <linux/fb.h>
	52	#include <linux/selection.h>
	53	#include <linux/init.h>
1da177e4 LT	54	#include <linux/nvram.h>
	55	#include <linux/adb.h>
	56	#include <linux/cuda.h>
	57	#include <asm/io.h>
	58	#ifdef CONFIG_MAC
	59	#include <asm/bootinfo.h>
	60	#include <asm/macintosh.h>
	61	#else
	62	#include <asm/prom.h>
	63	#endif
	64	#include <asm/pgtable.h>
	65
	66	#include "macmodes.h"
	67	#include "valkyriefb.h"
	68
	69	#ifdef CONFIG_MAC
	70	/* We don't yet have functions to read the PRAM... perhaps we can
	71	adapt them from the PPC code? */
11e8faca	72	static int default_vmode = VMODE_CHOOSE;
1da177e4 LT	73	static int default_cmode = CMODE_8;
	74	#else
	75	static int default_vmode = VMODE_NVRAM;
	76	static int default_cmode = CMODE_NVRAM;
	77	#endif
	78
	79	struct fb_par_valkyrie {
	80	int vmode, cmode;
	81	int xres, yres;
	82	int vxres, vyres;
	83	struct valkyrie_regvals *init;
	84	};
	85
	86	struct fb_info_valkyrie {
	87	struct fb_info info;
	88	struct fb_par_valkyrie par;
	89	struct cmap_regs __iomem *cmap_regs;
	90	unsigned long cmap_regs_phys;
	91
	92	struct valkyrie_regs __iomem *valkyrie_regs;
	93	unsigned long valkyrie_regs_phys;
	94
	95	__u8 __iomem *frame_buffer;
	96	unsigned long frame_buffer_phys;
	97
	98	int sense;
	99	unsigned long total_vram;
	100
	101	u32 pseudo_palette[16];
	102	};
	103
	104	/*
	105	* Exported functions
	106	*/
	107	int valkyriefb_init(void);
	108	int valkyriefb_setup(char*);
	109
	110	static int valkyriefb_check_var(struct fb_var_screeninfo *var,
	111	struct fb_info *info);
	112	static int valkyriefb_set_par(struct fb_info *info);
	113	static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	114	u_int transp, struct fb_info *info);
	115	static int valkyriefb_blank(int blank_mode, struct fb_info *info);
	116
	117	static int read_valkyrie_sense(struct fb_info_valkyrie *p);
	118	static void set_valkyrie_clock(unsigned char *params);
	119	static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
	120	struct fb_par_valkyrie par, const struct fb_info fb_info);
	121
ccb121e6	122	static int valkyrie_init_info(struct fb_info info, struct fb_info_valkyrie p);
1da177e4 LT	123	static void valkyrie_par_to_fix(struct fb_par_valkyrie par, struct fb_fix_screeninfo fix);
	124	static void valkyrie_init_fix(struct fb_fix_screeninfo fix, struct fb_info_valkyrie p);
	125
	126	static struct fb_ops valkyriefb_ops = {
	127	.owner = THIS_MODULE,
	128	.fb_check_var = valkyriefb_check_var,
	129	.fb_set_par = valkyriefb_set_par,
	130	.fb_setcolreg = valkyriefb_setcolreg,
	131	.fb_blank = valkyriefb_blank,
	132	.fb_fillrect = cfb_fillrect,
	133	.fb_copyarea = cfb_copyarea,
	134	.fb_imageblit = cfb_imageblit,
1da177e4 LT	135	};
	136
	137	/* Sets the video mode according to info->var */
	138	static int valkyriefb_set_par(struct fb_info *info)
	139	{
	140	struct fb_info_valkyrie p = (struct fb_info_valkyrie ) info;
	141	volatile struct valkyrie_regs __iomem *valkyrie_regs = p->valkyrie_regs;
	142	struct fb_par_valkyrie *par = info->par;
	143	struct valkyrie_regvals *init;
	144	int err;
	145
	146	if ((err = valkyrie_var_to_par(&info->var, par, info)))
	147	return err;
	148
	149	valkyrie_par_to_fix(par, &info->fix);
	150
	151	/* Reset the valkyrie */
	152	out_8(&valkyrie_regs->status.r, 0);
	153	udelay(100);
	154
	155	/* Initialize display timing registers */
	156	init = par->init;
	157	out_8(&valkyrie_regs->mode.r, init->mode \| 0x80);
	158	out_8(&valkyrie_regs->depth.r, par->cmode + 3);
	159	set_valkyrie_clock(init->clock_params);
	160	udelay(100);
	161
	162	/* Turn on display */
	163	out_8(&valkyrie_regs->mode.r, init->mode);
	164
	165	return 0;
	166	}
	167
	168	static inline int valkyrie_par_to_var(struct fb_par_valkyrie *par,
	169	struct fb_var_screeninfo *var)
	170	{
	171	return mac_vmode_to_var(par->vmode, par->cmode, var);
	172	}
	173
	174	static int
	175	valkyriefb_check_var(struct fb_var_screeninfo var, struct fb_info info)
	176	{
	177	int err;
	178	struct fb_par_valkyrie par;
	179
	180	if ((err = valkyrie_var_to_par(var, &par, info)))
	181	return err;
	182	valkyrie_par_to_var(&par, var);
	183	return 0;
	184	}
	185
	186	/*
	187	* Blank the screen if blank_mode != 0, else unblank. If blank_mode == NULL
	188	* then the caller blanks by setting the CLUT (Color Look Up Table) to all
	189	* black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
	190	* to e.g. a video mode which doesn't support it. Implements VESA suspend
	191	* and powerdown modes on hardware that supports disabling hsync/vsync:
	192	* blank_mode == 2: suspend vsync
	193	* blank_mode == 3: suspend hsync
	194	* blank_mode == 4: powerdown
	195	*/
	196	static int valkyriefb_blank(int blank_mode, struct fb_info *info)
	197	{
	198	struct fb_info_valkyrie p = (struct fb_info_valkyrie ) info;
199	struct fb_par_valkyrie *par = info->par;
200	struct valkyrie_regvals *init = par->init;
201
202	if (init == NULL)
203	return 1;
204
205	switch (blank_mode) {
206	case FB_BLANK_UNBLANK: /* unblank */
207	out_8(&p->valkyrie_regs->mode.r, init->mode);
208	break;
209	case FB_BLANK_NORMAL:
210	return 1; /* get caller to set CLUT to all black */
211	case FB_BLANK_VSYNC_SUSPEND:
212	case FB_BLANK_HSYNC_SUSPEND:
213	/*
214	* [kps] Value extracted from MacOS. I don't know
215	* whether this bit disables hsync or vsync, or
216	* whether the hardware can do the other as well.
217	*/
218	out_8(&p->valkyrie_regs->mode.r, init->mode \| 0x40);
219	break;
220	case FB_BLANK_POWERDOWN:
221	out_8(&p->valkyrie_regs->mode.r, 0x66);
222	break;
223	}
224	return 0;
225	}
226
227	static int valkyriefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
228	u_int transp, struct fb_info *info)
229	{
230	struct fb_info_valkyrie p = (struct fb_info_valkyrie ) info;
231	volatile struct cmap_regs __iomem *cmap_regs = p->cmap_regs;
232	struct fb_par_valkyrie *par = info->par;
233
234	if (regno > 255)
235	return 1;
236	red >>= 8;
237	green >>= 8;
238	blue >>= 8;
239
240	/* tell clut which address to fill */
241	out_8(&p->cmap_regs->addr, regno);
242	udelay(1);
243	/* send one color channel at a time */
244	out_8(&cmap_regs->lut, red);
245	out_8(&cmap_regs->lut, green);
246	out_8(&cmap_regs->lut, blue);
247
248	if (regno < 16 && par->cmode == CMODE_16)
249	((u32 *)info->pseudo_palette)[regno] =
250	(regno << 10) \| (regno << 5) \| regno;
251
252	return 0;
253	}
254
255	static inline int valkyrie_vram_reqd(int video_mode, int color_mode)
256	{
257	int pitch;
258	struct valkyrie_regvals *init = valkyrie_reg_init[video_mode-1];
259
260	if ((pitch = init->pitch[color_mode]) == 0)
261	pitch = 2 * init->pitch[0];
262	return init->vres * pitch;
263	}
264
265	static void set_valkyrie_clock(unsigned char *params)
266	{
267	struct adb_request req;
268	int i;
269
270	#ifdef CONFIG_ADB_CUDA
271	for (i = 0; i < 3; ++i) {
272	cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC,
273	0x50, i + 1, params[i]);
274	while (!req.complete)
275	cuda_poll();
276	}
277	#endif
278	}
279
280	static void __init valkyrie_choose_mode(struct fb_info_valkyrie *p)
281	{
282	p->sense = read_valkyrie_sense(p);
283	printk(KERN_INFO "Monitor sense value = 0x%x\n", p->sense);
284
285	/* Try to pick a video mode out of NVRAM if we have one. */
996f3247	286	#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
1da177e4 LT	287	if (default_vmode == VMODE_NVRAM) {
	288	default_vmode = nvram_read_byte(NV_VMODE);
	289	if (default_vmode <= 0
	290	\|\| default_vmode > VMODE_MAX
	291	\|\| !valkyrie_reg_init[default_vmode - 1])
	292	default_vmode = VMODE_CHOOSE;
	293	}
	294	#endif
	295	if (default_vmode == VMODE_CHOOSE)
	296	default_vmode = mac_map_monitor_sense(p->sense);
	297	if (!valkyrie_reg_init[default_vmode - 1])
	298	default_vmode = VMODE_640_480_67;
996f3247	299	#if !defined(CONFIG_MAC) && defined(CONFIG_NVRAM)
1da177e4 LT	300	if (default_cmode == CMODE_NVRAM)
	301	default_cmode = nvram_read_byte(NV_CMODE);
	302	#endif
	303
	304	/*
	305	* Reduce the pixel size if we don't have enough VRAM or bandwidth.
	306	*/
	307	if (default_cmode < CMODE_8 \|\| default_cmode > CMODE_16
	308	\|\| valkyrie_reg_init[default_vmode-1]->pitch[default_cmode] == 0
	309	\|\| valkyrie_vram_reqd(default_vmode, default_cmode) > p->total_vram)
	310	default_cmode = CMODE_8;
	311
	312	printk(KERN_INFO "using video mode %d and color mode %d.\n",
	313	default_vmode, default_cmode);
	314	}
	315
	316	int __init valkyriefb_init(void)
	317	{
	318	struct fb_info_valkyrie *p;
	319	unsigned long frame_buffer_phys, cmap_regs_phys, flags;
	320	int err;
	321	char *option = NULL;
	322
	323	if (fb_get_options("valkyriefb", &option))
	324	return -ENODEV;
	325	valkyriefb_setup(option);
	326
	327	#ifdef CONFIG_MAC
	328	if (!MACH_IS_MAC)
11e8faca	329	return -ENODEV;
1da177e4 LT	330	if (!(mac_bi_data.id == MAC_MODEL_Q630
	331	/* I'm not sure about this one */
	332	\|\| mac_bi_data.id == MAC_MODEL_P588))
11e8faca	333	return -ENODEV;
1da177e4 LT	334
	335	/* Hardcoded addresses... welcome to 68k Macintosh country :-) */
	336	frame_buffer_phys = 0xf9000000;
	337	cmap_regs_phys = 0x50f24000;
	338	flags = IOMAP_NOCACHE_SER; /* IOMAP_WRITETHROUGH?? */
	339	#else /* ppc (!CONFIG_MAC) */
	340	{
	341	struct device_node *dp;
cc5d0189	342	struct resource r;
1da177e4	343
cc5d0189	344	dp = of_find_node_by_name(NULL, "valkyrie");
1da177e4 LT	345	if (dp == 0)
	346	return 0;
	347
cc5d0189 BH	348	if (of_address_to_resource(dp, 0, &r)) {
cc5d0189 BH	349	printk(KERN_ERR "can't find address for valkyrie\n");
1da177e4 LT	350	return 0;
	351	}
	352
cc5d0189 BH	353	frame_buffer_phys = r.start;
cc5d0189 BH	354	cmap_regs_phys = r.start + 0x304000;
1da177e4 LT	355	flags = _PAGE_WRITETHRU;
	356	}
	357	#endif /* ppc (!CONFIG_MAC) */
	358
dd00cc48	359	p = kzalloc(sizeof(*p), GFP_ATOMIC);
1da177e4 LT	360	if (p == 0)
1da177e4 LT	361	return -ENOMEM;
1da177e4 LT	362
	363	/* Map in frame buffer and registers */
	364	if (!request_mem_region(frame_buffer_phys, 0x100000, "valkyriefb")) {
	365	kfree(p);
	366	return 0;
	367	}
	368	p->total_vram = 0x100000;
	369	p->frame_buffer_phys = frame_buffer_phys;
	370	p->frame_buffer = __ioremap(frame_buffer_phys, p->total_vram, flags);
	371	p->cmap_regs_phys = cmap_regs_phys;
	372	p->cmap_regs = ioremap(p->cmap_regs_phys, 0x1000);
	373	p->valkyrie_regs_phys = cmap_regs_phys+0x6000;
	374	p->valkyrie_regs = ioremap(p->valkyrie_regs_phys, 0x1000);
	375	err = -ENOMEM;
	376	if (p->frame_buffer == NULL \|\| p->cmap_regs == NULL
	377	\|\| p->valkyrie_regs == NULL) {
	378	printk(KERN_ERR "valkyriefb: couldn't map resources\n");
	379	goto out_free;
	380	}
	381
	382	valkyrie_choose_mode(p);
	383	mac_vmode_to_var(default_vmode, default_cmode, &p->info.var);
ccb121e6 AS	384	err = valkyrie_init_info(&p->info, p);
	385	if (err < 0)
	386	goto out_free;
1da177e4 LT	387	valkyrie_init_fix(&p->info.fix, p);
	388	if (valkyriefb_set_par(&p->info))
	389	/* "can't happen" */
	390	printk(KERN_ERR "valkyriefb: can't set default video mode\n");
	391
	392	if ((err = register_framebuffer(&p->info)) != 0)
ccb121e6	393	goto out_cmap_free;
1da177e4 LT	394
	395	printk(KERN_INFO "fb%d: valkyrie frame buffer device\n", p->info.node);
	396	return 0;
	397
ccb121e6 AS	398	out_cmap_free:
ccb121e6 AS	399	fb_dealloc_cmap(&p->info.cmap);
1da177e4 LT	400	out_free:
	401	if (p->frame_buffer)
	402	iounmap(p->frame_buffer);
	403	if (p->cmap_regs)
	404	iounmap(p->cmap_regs);
	405	if (p->valkyrie_regs)
	406	iounmap(p->valkyrie_regs);
	407	kfree(p);
	408	return err;
	409	}
	410
	411	/*
	412	* Get the monitor sense value.
	413	*/
	414	static int read_valkyrie_sense(struct fb_info_valkyrie *p)
	415	{
	416	int sense, in;
	417
	418	out_8(&p->valkyrie_regs->msense.r, 0); /* release all lines */
	419	__delay(20000);
	420	sense = ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x70) << 4;
	421	/* drive each sense line low in turn and collect the other 2 */
	422	out_8(&p->valkyrie_regs->msense.r, 4); /* drive A low */
	423	__delay(20000);
	424	sense \|= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x30);
	425	out_8(&p->valkyrie_regs->msense.r, 2); /* drive B low */
	426	__delay(20000);
	427	sense \|= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x40) >> 3;
	428	sense \|= (in & 0x10) >> 2;
	429	out_8(&p->valkyrie_regs->msense.r, 1); /* drive C low */
	430	__delay(20000);
	431	sense \|= ((in = in_8(&p->valkyrie_regs->msense.r)) & 0x60) >> 5;
	432
	433	out_8(&p->valkyrie_regs->msense.r, 7);
	434
	435	return sense;
	436	}
	437
	438	/*
	439	* This routine takes a user-supplied var,
	440	* and picks the best vmode/cmode from it.
	441	*/
	442
	443	/* [bkn] I did a major overhaul of this function.
	444	*
	445	* Much of the old code was "swiped by jonh from atyfb.c". Because
	446	* macmodes has mac_var_to_vmode, I felt that it would be better to
	447	* rework this function to use that, instead of reinventing the wheel to
	448	* add support for vmode 17. This was reinforced by the fact that
	449	* the previously swiped atyfb.c code is no longer there.
	450	*
	451	* So, I swiped and adapted platinum_var_to_par (from platinumfb.c), replacing
	452	* most, but not all, of the old code in the process. One side benefit of
	453	* swiping the platinumfb code is that we now have more comprehensible error
	454	* messages when a vmode/cmode switch fails. (Most of the error messages are
	455	* platinumfb.c, but I added two of my own, and I also changed some commas
	456	* into colons to make the messages more consistent with other Linux error
	457	* messages.) In addition, I think the new code might fix some vmode-
	458	* switching oddities, but I'm not sure.
	459	*
	460	* There may be some more opportunities for cleanup in here, but this is a
	461	* good start...
	462	*/
	463
464	static int valkyrie_var_to_par(struct fb_var_screeninfo *var,
465	struct fb_par_valkyrie par, const struct fb_info fb_info)
466	{
467	int vmode, cmode;
468	struct valkyrie_regvals *init;
469	struct fb_info_valkyrie p = (struct fb_info_valkyrie ) fb_info;
470
471	if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
472	printk(KERN_ERR "valkyriefb: can't do %dx%dx%d.\n",
473	var->xres, var->yres, var->bits_per_pixel);
474	return -EINVAL;
475	}
476
477	/* Check if we know about the wanted video mode */
478	if (vmode < 1 \|\| vmode > VMODE_MAX \|\| !valkyrie_reg_init[vmode-1]) {
479	printk(KERN_ERR "valkyriefb: vmode %d not valid.\n", vmode);
480	return -EINVAL;
481	}
482
483	if (cmode != CMODE_8 && cmode != CMODE_16) {
484	printk(KERN_ERR "valkyriefb: cmode %d not valid.\n", cmode);
485	return -EINVAL;
486	}
487
488	if (var->xres_virtual > var->xres \|\| var->yres_virtual > var->yres
489	\|\| var->xoffset != 0 \|\| var->yoffset != 0) {
490	return -EINVAL;
491	}
492
493	init = valkyrie_reg_init[vmode-1];
494	if (init->pitch[cmode] == 0) {
495	printk(KERN_ERR "valkyriefb: vmode %d does not support "
496	"cmode %d.\n", vmode, cmode);
497	return -EINVAL;
498	}
499
500	if (valkyrie_vram_reqd(vmode, cmode) > p->total_vram) {
501	printk(KERN_ERR "valkyriefb: not enough ram for vmode %d, "
502	"cmode %d.\n", vmode, cmode);
503	return -EINVAL;
504	}
505
506	par->vmode = vmode;
507	par->cmode = cmode;
508	par->init = init;
509	par->xres = var->xres;
510	par->yres = var->yres;
511	par->vxres = par->xres;
512	par->vyres = par->yres;
513
514	return 0;
515	}
516
517	static void valkyrie_init_fix(struct fb_fix_screeninfo fix, struct fb_info_valkyrie p)
518	{
519	memset(fix, 0, sizeof(*fix));
520	strcpy(fix->id, "valkyrie");
521	fix->mmio_start = p->valkyrie_regs_phys;
522	fix->mmio_len = sizeof(struct valkyrie_regs);
523	fix->type = FB_TYPE_PACKED_PIXELS;
524	fix->smem_start = p->frame_buffer_phys + 0x1000;
525	fix->smem_len = p->total_vram;
526
527	fix->type_aux = 0;
528	fix->ywrapstep = 0;
529	fix->ypanstep = 0;
530	fix->xpanstep = 0;
531
532	}
533
534	/* Fix must already be inited above */
535	static void valkyrie_par_to_fix(struct fb_par_valkyrie *par,
536	struct fb_fix_screeninfo *fix)
537	{
538	fix->smem_len = valkyrie_vram_reqd(par->vmode, par->cmode);
539	fix->visual = (par->cmode == CMODE_8) ?
540	FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
541	fix->line_length = par->vxres << par->cmode;
542	/* ywrapstep, xpanstep, ypanstep */
543	}
544
ccb121e6 AS	545	static int __init valkyrie_init_info(struct fb_info *info,
ccb121e6 AS	546	struct fb_info_valkyrie *p)
1da177e4 LT	547	{
	548	info->fbops = &valkyriefb_ops;
	549	info->screen_base = p->frame_buffer + 0x1000;
	550	info->flags = FBINFO_DEFAULT;
	551	info->pseudo_palette = p->pseudo_palette;
1da177e4	552	info->par = &p->par;
ccb121e6	553	return fb_alloc_cmap(&info->cmap, 256, 0);
1da177e4 LT	554	}
	555
	556
	557	/*
75e1b6a8	558	* Parse user specified options (`video=valkyriefb:')
1da177e4 LT	559	*/
	560	int __init valkyriefb_setup(char *options)
	561	{
	562	char *this_opt;
	563
	564	if (!options \|\| !*options)
	565	return 0;
	566
	567	while ((this_opt = strsep(&options, ",")) != NULL) {
	568	if (!strncmp(this_opt, "vmode:", 6)) {
	569	int vmode = simple_strtoul(this_opt+6, NULL, 0);
	570	if (vmode > 0 && vmode <= VMODE_MAX)
	571	default_vmode = vmode;
	572	}
	573	else if (!strncmp(this_opt, "cmode:", 6)) {
	574	int depth = simple_strtoul(this_opt+6, NULL, 0);
	575	switch (depth) {
	576	case 8:
	577	default_cmode = CMODE_8;
	578	break;
	579	case 15:
	580	case 16:
	581	default_cmode = CMODE_16;
	582	break;
	583	}
	584	}
	585	}
	586	return 0;
	587	}
	588
	589	module_init(valkyriefb_init);
	590	MODULE_LICENSE("GPL");