1 files changed, 590 insertions, 0 deletions

diff --git a/drivers/video/valkyriefb.c b/drivers/video/valkyriefb.c
new file mode 100644
index 0000000..31a2bbc
--- /dev/null
+++ b/drivers/video/valkyriefb.c
@@ -0,0 +1,590 @@
+/*
+ *  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.
+ */
+
+#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>
+#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_640_480_67;
+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 void 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,
+	.fb_cursor	= soft_cursor,
+};
+
+/* 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. */
+#ifndef CONFIG_MAC
+	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;
+#ifndef CONFIG_MAC
+	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 0;
+	if (!(mac_bi_data.id == MAC_MODEL_Q630
+	      /* I'm not sure about this one */
+	    || mac_bi_data.id == MAC_MODEL_P588))
+		return 0;
+
+	/* 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;
+
+		dp = find_devices("valkyrie");
+		if (dp == 0)
+			return 0;
+
+		if (dp->n_addrs != 1) {
+			printk(KERN_ERR "expecting 1 address for valkyrie (got %d)\n",
+			       dp->n_addrs);
+			return 0;
+		}
+
+		frame_buffer_phys = dp->addrs[0].address;
+		cmap_regs_phys = dp->addrs[0].address+0x304000;
+		flags = _PAGE_WRITETHRU;
+	}
+#endif /* ppc (!CONFIG_MAC) */
+
+	p = kmalloc(sizeof(*p), GFP_ATOMIC);
+	if (p == 0)
+		return -ENOMEM;
+	memset(p, 0, sizeof(*p));
+
+	/* 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);
+	valkyrie_init_info(&p->info, p);
+	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_free;
+
+	printk(KERN_INFO "fb%d: valkyrie frame buffer device\n", p->info.node);
+	return 0;
+
+ 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 void __init valkyrie_init_info(struct fb_info *info, struct fb_info_valkyrie *p)
+{
+	info->fbops = &valkyriefb_ops;
+	info->screen_base = p->frame_buffer + 0x1000;
+	info->flags = FBINFO_DEFAULT;
+	info->pseudo_palette = p->pseudo_palette;
+	fb_alloc_cmap(&info->cmap, 256, 0);
+	info->par = &p->par;
+}
+
+
+/*
+ * Parse user speficied options (`video=valkyriefb:')
+ */
+int __init valkyriefb_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options)
+		return 0;
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!strncmp(this_opt, "vmode:", 6)) {
+	    		int vmode = simple_strtoul(this_opt+6, NULL, 0);
+			if (vmode > 0 && vmode <= VMODE_MAX)
+				default_vmode = vmode;
+		}
+		else if (!strncmp(this_opt, "cmode:", 6)) {
+			int depth = simple_strtoul(this_opt+6, NULL, 0);
+			switch (depth) {
+			case 8:
+				default_cmode = CMODE_8;
+				break;
+			case 15:
+			case 16:
+				default_cmode = CMODE_16;
+				break;
+			}
+		}
+	}
+	return 0;
+}
+
+module_init(valkyriefb_init);
+MODULE_LICENSE("GPL");