xref: /src/sys/arch/powerpc/oea/ofw_autoconf.c

/* $NetBSD: ofw_autoconf.c,v 1.2.8.3 2007/12/08 18:17:39 mjf Exp $ */
/*
 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
 * Copyright (C) 1995, 1996 TooLs GmbH.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by TooLs GmbH.
 * 4. The name of TooLs GmbH may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ofw_autoconf.c,v 1.2.8.3 2007/12/08 18:17:39 mjf Exp $");

#include <sys/param.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/reboot.h>
#include <sys/systm.h>

#include <uvm/uvm_extern.h>

#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/stdarg.h>

#include <dev/ofw/openfirm.h>
#include <dev/pci/pcivar.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/ata/atavar.h>
#include <dev/ic/wdcvar.h>

extern char bootpath[256];
char cbootpath[256];
int console_node = 0, console_instance = 0;

static void canonicalize_bootpath(void);

/*
 * Determine device configuration for a machine.
 */
void
cpu_configure(void)
{
	init_interrupt();
	canonicalize_bootpath();

	if (config_rootfound("mainbus", NULL) == NULL)
		panic("configure: mainbus not configured");

	genppc_cpu_configure();
}

static void
canonicalize_bootpath(void)
{
	int node;
	char *p, *lastp;
	char last[32];

	/*
	 * If the bootpath doesn't start with a / then it isn't
	 * an OFW path and probably is an alias, so look up the alias
	 * and regenerate the full bootpath so device_register will work.
	 */
	if (bootpath[0] != '/' && bootpath[0] != '\0') {
		int aliases = OF_finddevice("/aliases");
		char tmpbuf[100];
		char aliasbuf[256];
		if (aliases != 0) {
			char *cp1, *cp2, *cp;
			char saved_ch = '\0';
			int len;
			cp1 = strchr(bootpath, ':');
			cp2 = strchr(bootpath, ',');
			cp = cp1;
			if (cp1 == NULL || (cp2 != NULL && cp2 < cp1))
				cp = cp2;
			tmpbuf[0] = '\0';
			if (cp != NULL) {
				strcpy(tmpbuf, cp);
				saved_ch = *cp;
				*cp = '\0';
			}
			len = OF_getprop(aliases, bootpath, aliasbuf,
			    sizeof(aliasbuf));
			if (len > 0) {
				if (aliasbuf[len-1] == '\0')
					len--;
				memcpy(bootpath, aliasbuf, len);
				strcpy(&bootpath[len], tmpbuf);
			} else {
				*cp = saved_ch;
			}
		}
	}

	/*
	 * Strip kernel name.  bootpath contains "OF-path"/"kernel".
	 *
	 * for example:
	 *   /bandit@F2000000/gc@10/53c94@10000/sd@0,0/netbsd	(OF-1.x)
	 *   /pci/mac-io/ata-3@2000/disk@0:0/netbsd.new		(OF-3.x)
	 */
	strcpy(cbootpath, bootpath);
	while ((node = OF_finddevice(cbootpath)) == -1) {
		if ((p = strrchr(cbootpath, '/')) == NULL)
			break;
		*p = '\0';
	}

	if (node == -1) {
		/* Cannot canonicalize... use bootpath anyway. */
		strcpy(cbootpath, bootpath);

		return;
	}

	/*
	 * cbootpath is a valid OF path.  Use package-to-path to
	 * canonicalize pathname.
	 */

	/* Back up the last component for later use. */
	if ((p = strrchr(cbootpath, '/')) != NULL)
		strcpy(last, p + 1);
	else
		last[0] = '\0';

	memset(cbootpath, 0, sizeof(cbootpath));
	OF_package_to_path(node, cbootpath, sizeof(cbootpath) - 1);

	/*
	 * OF_1.x (at least) always returns addr == 0 for
	 * SCSI disks (i.e. "/bandit (at) .../.../sd@0,0").
	 */
	lastp = strrchr(cbootpath, '/');
	if (lastp != NULL) {
		lastp++;
		if (strncmp(lastp, "sd@", 3) == 0
		    && strncmp(last, "sd@", 3) == 0)
			strcpy(lastp, last);
	} else {
		lastp = cbootpath;
	}

	/*
	 * At this point, cbootpath contains like:
	 * "/pci@80000000/mac-io@10/ata-3@20000/disk"
	 *
	 * The last component may have no address... so append it.
	 */
	if (strchr(lastp, '@') == NULL) {
		/* Append it. */
		if ((p = strrchr(last, '@')) != NULL)
			strcat(cbootpath, p);
	}

	if ((p = strrchr(lastp, ':')) != NULL) {
		*p++ = '\0';
		/* booted_partition = *p - '0';		XXX correct? */
	}

	/* XXX Does this belong here, or device_register()? */
	if ((p = strrchr(lastp, ',')) != NULL)
		*p = '\0';
}

/*
 * device_register is called from config_attach as each device is
 * attached. We use it to find the NetBSD device corresponding to the
 * known OF boot device.
 */
void
device_register(dev, aux)
	struct device *dev;
	void *aux;
{
	static struct device *parent;
	static char *bp = bootpath + 1, *cp = cbootpath;
	unsigned long addr;
	char *p;

	/* Skip over devices not represented in the OF tree. */
	if (device_is_a(dev, "mainbus")) {
		parent = dev;
		return;
	}
	if (device_is_a(dev, "atapibus") || device_is_a(dev, "pci") ||
	    device_is_a(dev, "scsibus") || device_is_a(dev, "atabus"))
		return;

	if (device_is_a(device_parent(dev), "pci")) {
		/* see if this is going to be console */
		struct pci_attach_args *pa = aux;
		prop_dictionary_t dict;
		int node;
		char name[32];

		dict = device_properties(dev);
		node = pcidev_to_ofdev(pa->pa_pc, pa->pa_tag);

		if (node != 0) {
			prop_dictionary_set_uint32(dict, "device_node", node);

			memset(name, 0, sizeof(name));
			OF_getprop(node, "device_type", name, sizeof(name));
			if (strcmp(name, "display") == 0) {
				/* setup display properties for fb driver */
				prop_dictionary_set_bool(dict, "is_console", 0);
				copy_disp_props(dev, node, dict);
			}
		}
	}

	if (booted_device)
		return;

	if (device_is_a(device_parent(dev), "atapibus") ||
	    device_is_a(device_parent(dev), "atabus") ||
	    device_is_a(device_parent(dev), "pci") ||
	    device_is_a(device_parent(dev), "scsibus")) {
		if (device_parent(device_parent(dev)) != parent)
			return;
	} else {
		if (device_parent(dev) != parent)
			return;
	}

	/* Get the address part of the current path component. The
	 * last component of the canonical bootpath may have no
	 * address (eg, "disk"), in which case we need to get the
	 * address from the original bootpath instead.
	 */
	p = strchr(cp, '@');
	if (!p) {
		if (bp)
			p = strchr(bp, '@');
		if (!p)
			addr = 0;
		else {
			addr = strtoul(p + 1, NULL, 16);
			p = NULL;
		}
	} else
		addr = strtoul(p + 1, &p, 16);

	if (device_is_a(device_parent(dev), "mainbus")) {
		struct confargs *ca = aux;

		if (strcmp(ca->ca_name, "ofw") == 0)		/* XXX */
			return;
		if (addr != ca->ca_reg[0])
			return;
	} else if (device_is_a(device_parent(dev), "pci")) {
		struct pci_attach_args *pa = aux;

		if (addr != pa->pa_device)
			return;
	} else if (device_is_a(device_parent(dev), "obio")) {
		struct confargs *ca = aux;

		if (addr != ca->ca_reg[0])
			return;
	} else if (device_is_a(device_parent(dev), "scsibus") ||
		   device_is_a(device_parent(dev), "atapibus")) {
		struct scsipibus_attach_args *sa = aux;

		/* periph_target is target for scsi, drive # for atapi */
		if (addr != sa->sa_periph->periph_target)
			return;
	} else if (device_is_a(device_parent(device_parent(dev)), "pciide")) {
		struct ata_device *adev = aux;

		if (addr != adev->adev_drv_data->drive)
			return;

		/*
		 * OF splits channel and drive into separate path
		 * components, so check the addr part of the next
		 * component. (Ignore bp, because the canonical path
		 * will be complete in the pciide case.)
		 */
		p = strchr(p, '@');
		if (!p++)
			return;
		if (strtoul(p, &p, 16) != adev->adev_drv_data->drive)
			return;
	} else if (device_is_a(device_parent(device_parent(dev)), "wdc")) {
		struct ata_device *adev = aux;

		if (addr != adev->adev_drv_data->drive)
			return;
	} else
		return;

	/* If we reach this point, then dev is a match for the current
	 * path component.
	 */

	if (p && *p) {
		parent = dev;
		cp = p;
		bp = strchr(bp, '/');
		if (bp)
			bp++;
		return;
	} else {
		booted_device = dev;
		booted_partition = 0; /* XXX -- should be extracted from bootpath */
		return;
	}
}

/*
 * Setup root device.
 * Configure swap area.
 */
void
cpu_rootconf()
{
	printf("boot device: %s\n",
	    booted_device ? booted_device->dv_xname : "<unknown>");

	setroot(booted_device, booted_partition);
}

/*
 * Find OF-device corresponding to the PCI device.
 */
int
pcidev_to_ofdev(pci_chipset_tag_t pc, pcitag_t tag)
{
	int bus, dev, func;
	u_int reg[5];
	int p, q;
	int l, b, d, f;

	pci_decompose_tag(pc, tag, &bus, &dev, &func);

	for (q = OF_peer(0); q; q = p) {
		l = OF_getprop(q, "assigned-addresses", reg, sizeof(reg));
		if (l > 4) {
			b = (reg[0] >> 16) & 0xff;
			d = (reg[0] >> 11) & 0x1f;
			f = (reg[0] >> 8) & 0x07;

			if (b == bus && d == dev && f == func)
				return q;
		}
		if ((p = OF_child(q)))
			continue;
		while (q) {
			if ((p = OF_peer(q)))
				break;
			q = OF_parent(q);
		}
	}
	return 0;
}