a driver for the phillips pcf8584 i2c controller as found on the sun netra

t1 105.

tested by henning@ djm@
ok kettenis@ put it in deraadt@

1 files changed, 118 insertions, 0 deletions

diff --git a/sys/arch/sparc64/dev/pcfiic_ebus.c b/sys/arch/sparc64/dev/pcfiic_ebus.c
new file mode 100644
index 00000000000..cb9ee7ef170
--- /dev/null
+++ b/sys/arch/sparc64/dev/pcfiic_ebus.c
@@ -0,0 +1,118 @@
+/*	$OpenBSD: pcfiic_ebus.c,v 1.1 2006/02/01 11:03:33 dlg Exp $ */
+
+/*
+ * Copyright (c) 2006 David Gwynne <dlg@openbsd.org>
+ *
+ * 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.
+ */
+
+/*
+ * Device specific driver for the EBus i2c devices found on some sun4u
+ * systems. On systems not having a boot-bus controller the i2c devices
+ * are PCF8584.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/kernel.h>
+
+#include <machine/bus.h>
+#include <machine/openfirm.h>
+
+#include <sparc64/dev/ebusreg.h>
+#include <sparc64/dev/ebusvar.h>
+
+#include <dev/i2c/i2cvar.h>
+#include <sparc64/dev/ofwi2cvar.h>
+
+#include <dev/ic/pcf8584var.h>
+
+int	pcfiic_ebus_match(struct device *, void *, void *);
+void	pcfiic_ebus_attach(struct device *, struct device *, void *);
+
+struct pcfiic_ebus_softc {
+	struct pcfiic_softc	esc_sc;
+
+	int			esc_node;
+	void			*esc_ih;
+};
+
+struct cfattach pcfiic_ebus_ca = {
+	sizeof(struct pcfiic_ebus_softc), pcfiic_ebus_match, pcfiic_ebus_attach
+};
+
+int
+pcfiic_ebus_match(struct device *parent, void *match, void *aux)
+{
+	struct ebus_attach_args		*ea = aux;
+	char				compat[32];
+
+	if (strcmp(ea->ea_name, "i2c") != 0)
+		return (0);
+
+	if (OF_getprop(ea->ea_node, "compatible", compat, sizeof(compat)) == -1)
+		return (0);
+
+	if (strcmp(compat, "i2cpcf,8584") != 0)
+		return (0);
+
+	return (1);
+}
+
+void
+pcfiic_ebus_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct pcfiic_ebus_softc	*esc = (struct pcfiic_ebus_softc *)self;
+	struct pcfiic_softc		*sc = &esc->esc_sc;
+        struct ebus_attach_args		*ea = aux;
+	u_int64_t			addr;
+
+	sc->sc_iot = ea->ea_memtag;
+
+	if (ea->ea_nregs != 1) {
+		printf(": expected 1 register, got %d\n", ea->ea_nregs);
+		return;
+	}
+
+	if (OF_getprop(ea->ea_node, "own-address", &addr, sizeof(addr)) == -1) {
+		printf(": unable to get own address\n");
+		return;
+	}
+	if (addr == 0x00 || addr > 0xff) {
+		printf(": invalid address on I2C bus\n");
+		return;
+	}
+
+	if (ebus_bus_map(sc->sc_iot, 0, EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
+	    ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) != 0) {
+                printf(": can't map register space\n");
+                return;
+        }
+
+	if (ea->ea_nintrs >= 1)
+		esc->esc_ih = bus_intr_establish(sc->sc_iot, ea->ea_intrs[0],
+		    IPL_BIO, 0, pcfiic_intr, sc, self->dv_xname);
+	else
+		esc->esc_ih = NULL;
+
+
+	if (esc->esc_ih == NULL)
+		sc->sc_poll = 1;
+
+#ifdef notyet
+	pcfiic_attach(sc, (i2c_addr_t)(addr >> 1), NULL, NULL);
+#endif
+	pcfiic_attach(sc, (i2c_addr_t)(addr >> 1), ofwi2c_scan, &ea->ea_node);
+	/* the rest of the attach line is printed by pcfiic_attach() */
+}