Add sbbc(4), a driver for the BootBus controller on Serengeti and StarCat

systems that provides time of day services and (in the future) console
services.

4 files changed, 210 insertions, 3 deletions

diff --git a/sys/arch/sparc64/conf/GENERIC b/sys/arch/sparc64/conf/GENERIC
index 54214eaf960..5d47b2ac31f 100644
--- a/sys/arch/sparc64/conf/GENERIC
+++ b/sys/arch/sparc64/conf/GENERIC
@@ -1,4 +1,4 @@
-#	$OpenBSD: GENERIC,v 1.213 2008/06/27 05:40:21 brad Exp $
+#	$OpenBSD: GENERIC,v 1.214 2008/07/06 07:27:43 kettenis Exp $
 #
 # For further information on compiling OpenBSD kernels, see the config(8)
 # man page.
@@ -52,6 +52,7 @@ ppb*	at pci?
 ebus*	at mainbus0
 ebus*	at pci?
 vbus0	at mainbus0
+sbbc*	at pci?
 
 # PCI Ethernet
 lmc*	at pci?			# Lan Media Corp SSI/T3/HSSI
diff --git a/sys/arch/sparc64/conf/RAMDISK b/sys/arch/sparc64/conf/RAMDISK
index 4d0a0bdae68..bf516126db9 100644
--- a/sys/arch/sparc64/conf/RAMDISK
+++ b/sys/arch/sparc64/conf/RAMDISK
@@ -1,4 +1,4 @@
-#	$OpenBSD: RAMDISK,v 1.73 2008/07/01 04:50:59 brad Exp $
+#	$OpenBSD: RAMDISK,v 1.74 2008/07/06 07:27:43 kettenis Exp $
 
 # Machine architecture; required by config(8)
 machine		sparc64
@@ -63,6 +63,7 @@ ppb*	at pci?
 ebus*	at mainbus0
 ebus*	at pci?
 vbus0	at mainbus0
+sbbc*	at pci?
 
 # PCI Ethernet
 hme*	at pci?			# Sun Happy Meal 10/100
diff --git a/sys/arch/sparc64/conf/files.sparc64 b/sys/arch/sparc64/conf/files.sparc64
index f687c16acc5..b7ffe67e729 100644
--- a/sys/arch/sparc64/conf/files.sparc64
+++ b/sys/arch/sparc64/conf/files.sparc64
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.sparc64,v 1.106 2008/06/10 00:02:09 kettenis Exp $
+#	$OpenBSD: files.sparc64,v 1.107 2008/07/06 07:27:43 kettenis Exp $
 #	$NetBSD: files.sparc64,v 1.50 2001/08/10 20:53:50 eeh Exp $
 
 # maxpartitions must be first item in files.${ARCH}
@@ -117,6 +117,10 @@ device	ifb: wsemuldisplaydev, rasops8
 attach	ifb at pci
 file	arch/sparc64/dev/ifb.c			ifb
 
+device	sbbc
+attach	sbbc at pci
+file	arch/sparc64/dev/sbbc.c			sbbc
+
 # IOMMU is for both sbus and pci
 file	arch/sparc64/dev/iommu.c		sbus | psycho | schizo | pyro | vpci
 file	arch/sparc64/dev/viommu.c		vpci
diff --git a/sys/arch/sparc64/dev/sbbc.c b/sys/arch/sparc64/dev/sbbc.c
new file mode 100644
index 00000000000..9bc9e033def
--- /dev/null
+++ b/sys/arch/sparc64/dev/sbbc.c
@@ -0,0 +1,201 @@
+/*	$OpenBSD: sbbc.c,v 1.1 2008/07/06 07:27:43 kettenis Exp $	*/
+/*
+ * Copyright (c) 2008 Mark Kettenis
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+#include <sys/systm.h>
+
+#include <machine/autoconf.h>
+#include <machine/openfirm.h>
+
+#include <dev/pci/pcidevs.h>
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+
+#include <dev/clock_subr.h>
+
+extern todr_chip_handle_t todr_handle;
+
+#define SBBC_PCI_BAR	PCI_MAPREG_START
+
+#define SBBC_REGS_OFFSET	0x800000
+#define SBBC_REGS_SIZE		0x6230
+#define SBBC_SRAM_OFFSET	0x900000
+#define SBBC_SRAM_SIZE		0x20000	/* 128KB SRAM */
+
+#define SBBC_MAX_TAGS	32
+
+struct sbbc_sram_tag {
+	char		tag_key[8];
+	uint32_t	tag_size;
+	uint32_t	tag_offset;
+};
+
+struct sbbc_sram_toc {
+	char			toc_magic[8];
+	uint8_t			toc_reserved;
+	uint8_t			toc_type;
+	uint16_t		toc_version;
+	uint32_t		toc_ntags;
+	struct sbbc_sram_tag 	toc_tag[SBBC_MAX_TAGS];
+};
+
+/* Time of day service. */
+struct sbbc_sram_tod {
+	uint32_t	tod_magic;
+	uint32_t	tod_version;
+	uint64_t	tod_time;
+	uint64_t	tod_skew;
+	uint32_t	tod_reserved;
+	uint32_t	tod_heartbeat;
+	uint32_t	tod_timeout;
+};
+
+#define SBBC_TOD_MAGIC		0x54443100
+#define SBBC_TOD_VERSION	1
+
+struct sbbc_softc {
+	struct device		sc_dv;
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_reg_ioh;
+	bus_space_handle_t	sc_sram_ioh;
+	caddr_t			sc_sram;
+	uint32_t		sc_sram_toc;
+
+	struct sparc_bus_space_tag sc_bbt;
+};
+
+int	sbbc_match(struct device *, void *, void *);
+void	sbbc_attach(struct device *, struct device *, void *);
+
+struct cfattach sbbc_ca = {
+	sizeof(struct sbbc_softc), sbbc_match, sbbc_attach
+};
+
+struct cfdriver sbbc_cd = {
+	NULL, "sbbc", DV_DULL
+};
+
+void	sbbc_attach_tod(struct sbbc_softc *, uint32_t);
+int	sbbc_tod_gettime(todr_chip_handle_t, struct timeval *);
+int	sbbc_tod_settime(todr_chip_handle_t, struct timeval *);
+
+int
+sbbc_match(struct device *parent, void *match, void *aux)
+{
+	struct pci_attach_args *pa = aux;
+
+	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SUN &&
+	    (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SUN_SBBC))
+		return (1);
+
+	return (0);
+}
+
+void
+sbbc_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct sbbc_softc *sc = (void *)self;
+	struct pci_attach_args *pa = aux;
+	struct sbbc_sram_toc *toc;
+	bus_addr_t base;
+	bus_size_t size;
+	int chosen, iosram;
+	int i;
+
+	/* XXX Don't byteswap. */
+	sc->sc_bbt = *pa->pa_memt;
+	sc->sc_bbt.sasi = ASI_PRIMARY;
+	sc->sc_iot = &sc->sc_bbt;
+
+	if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, SBBC_PCI_BAR,
+	    PCI_MAPREG_TYPE_MEM, &base, &size, NULL)) {
+		printf(": can't find register space\n");
+		return;
+	}
+
+	if (bus_space_map(sc->sc_iot, base + SBBC_SRAM_OFFSET,
+	    SBBC_SRAM_SIZE, 0, &sc->sc_sram_ioh)) {
+		printf(": can't map SRAM\n");
+		return;
+	}
+
+	printf("\n");
+
+	/* Check if we are the chosen one. */
+	chosen = OF_finddevice("/chosen");
+	if (OF_getprop(chosen, "iosram", &iosram, sizeof(iosram)) <= 0 ||
+	    PCITAG_NODE(pa->pa_tag) != iosram)
+		return;
+
+	/* SRAM TOC offset defaults to 0. */
+	if (OF_getprop(chosen, "iosram-toc", &sc->sc_sram_toc,
+	    sizeof(sc->sc_sram_toc)) <= 0)
+		sc->sc_sram_toc = 0;
+
+	sc->sc_sram = bus_space_vaddr(sc->sc_iot, sc->sc_sram_ioh);
+	toc = (struct sbbc_sram_toc *)(sc->sc_sram + sc->sc_sram_toc);
+
+	for (i = 0; i < toc->toc_ntags; i++) {
+		if (strcmp(toc->toc_tag[i].tag_key, "TODDATA") == 0)
+			sbbc_attach_tod(sc, toc->toc_tag[i].tag_offset);
+	}
+}
+
+void
+sbbc_attach_tod(struct sbbc_softc *sc, uint32_t offset)
+{
+	struct sbbc_sram_tod *tod;
+	todr_chip_handle_t handle;
+
+	tod = (struct sbbc_sram_tod *)(sc->sc_sram + offset);
+	if (tod->tod_magic != SBBC_TOD_MAGIC ||
+	    tod->tod_version < SBBC_TOD_VERSION)
+		return;
+
+	handle = malloc(sizeof(struct todr_chip_handle), M_DEVBUF, M_NOWAIT);
+	if (handle == NULL)
+		panic("couldn't allocate todr_handle");
+
+	handle->cookie = tod;
+	handle->todr_gettime = sbbc_tod_gettime;
+	handle->todr_settime = sbbc_tod_settime;
+
+	handle->bus_cookie = NULL;
+	handle->todr_setwen = NULL;
+	todr_handle = handle;
+}
+
+int
+sbbc_tod_gettime(todr_chip_handle_t handle, struct timeval *tv)
+{
+	struct sbbc_sram_tod *tod = handle->cookie;
+
+	tv->tv_sec = tod->tod_time + tod->tod_skew;
+	tv->tv_usec = 0;
+	return (0);
+}
+
+int
+sbbc_tod_settime(todr_chip_handle_t handle, struct timeval *tv)
+{
+	struct sbbc_sram_tod *tod = handle->cookie;
+
+	tod->tod_skew = tv->tv_sec - tod->tod_time;
+	return (0);
+}