Module Name: src
Committed By: martin
Date: Sun Feb 28 11:47:28 UTC 2010
Modified Files:
src/sys/dev/ic: pcf8584.c pcf8584var.h
Log Message:
Update pcf8584 driver from OpenBSD
To generate a diff of this commit:
cvs rdiff -u -r1.5 -r1.6 src/sys/dev/ic/pcf8584.c
cvs rdiff -u -r1.3 -r1.4 src/sys/dev/ic/pcf8584var.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/ic/pcf8584.c
diff -u src/sys/dev/ic/pcf8584.c:1.5 src/sys/dev/ic/pcf8584.c:1.6
--- src/sys/dev/ic/pcf8584.c:1.5 Mon Apr 28 20:23:51 2008
+++ src/sys/dev/ic/pcf8584.c Sun Feb 28 11:47:28 2010
@@ -1,239 +1,308 @@
-/* $NetBSD: pcf8584.c,v 1.5 2008/04/28 20:23:51 martin Exp $ */
-
-/*-
- * Copyright (c) 2007 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Tobias Nygren.
- *
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``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 THE FOUNDATION OR CONTRIBUTORS
- * 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.
- */
+/* $NetBSD: pcf8584.c,v 1.6 2010/02/28 11:47:28 martin Exp $ */
+/* $OpenBSD: pcf8584.c,v 1.9 2007/10/20 18:46:21 kettenis Exp $ */
/*
- * Philips PCF8584 I2C Bus Controller
+ * Copyright (c) 2006 David Gwynne <d...@openbsd.org>
*
- * This driver does not yet support multi-master arbitration, concurrent access
- * or interrupts, but it should be usable for single-master applications.
- * It is currently used by the envctrl(4) driver on sparc64.
+ * 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/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pcf8584.c,v 1.5 2008/04/28 20:23:51 martin Exp $");
-
#include <sys/param.h>
+#include <sys/systm.h>
#include <sys/device.h>
+#include <sys/malloc.h>
#include <sys/kernel.h>
-#include <sys/systm.h>
-#include <sys/condvar.h>
-#include <sys/mutex.h>
-#include <sys/bus.h>
-#include <machine/param.h>
+#include <sys/rwlock.h>
+#include <sys/proc.h>
+
+#include <machine/bus.h>
+
#include <dev/i2c/i2cvar.h>
-#include <dev/ic/pcf8584reg.h>
+
#include <dev/ic/pcf8584var.h>
-static void pcf8584_bus_reset(struct pcf8584_handle *, int);
-static int pcf8584_exec(void *, i2c_op_t, i2c_addr_t, const void *, size_t,
- void *, size_t, int);
-static int pcf8584_acquire_bus(void *, int);
-static void pcf8584_release_bus(void *, int);
-static void pcf8584_wait(struct pcf8584_handle *, int);
-
-/* Must delay for 500 ns between bus accesses according to manual. */
-#define DATA_W(x) (DELAY(1), bus_space_write_1(ha->ha_iot, ha->ha_ioh, 0, x))
-#define DATA_R() (DELAY(1), bus_space_read_1(ha->ha_iot, ha->ha_ioh, 0))
-#define CSR_W(x) (DELAY(1), bus_space_write_1(ha->ha_iot, ha->ha_ioh, 1, x))
-#define STATUS_R() (DELAY(1), bus_space_read_1(ha->ha_iot, ha->ha_ioh, 1))
-#define BUSY() ((STATUS_R() & PCF8584_STATUS_BBN) == 0)
-#define PENDING() ((STATUS_R() & PCF8584_STATUS_PIN) == 0)
-#define NAK() ((STATUS_R() & PCF8584_STATUS_LRB) != 0)
+#define PCF_S0 0x00
+#define PCF_S1 0x01
+#define PCF_S2 0x02
+#define PCF_S3 0x03
+
+#define PCF_CTRL_ACK (1<<0)
+#define PCF_CTRL_STO (1<<1)
+#define PCF_CTRL_STA (1<<2)
+#define PCF_CTRL_ENI (1<<3)
+#define PCF_CTRL_ES2 (1<<4)
+#define PCF_CTRL_ES1 (1<<5)
+#define PCF_CTRL_ESO (1<<6)
+#define PCF_CTRL_PIN (1<<7)
+
+#define PCF_CTRL_START (PCF_CTRL_PIN | PCF_CTRL_ESO | \
+ PCF_CTRL_STA | PCF_CTRL_ACK)
+#define PCF_CTRL_STOP (PCF_CTRL_PIN | PCF_CTRL_ESO | \
+ PCF_CTRL_STO | PCF_CTRL_ACK)
+#define PCF_CTRL_REPSTART (PCF_CTRL_ESO | PCF_CTRL_STA | PCF_CTRL_ACK)
+#define PCF_CTRL_IDLE (PCF_CTRL_PIN | PCF_CTRL_ESO | PCF_CTRL_ACK)
+
+#define PCF_STAT_nBB (1<<0)
+#define PCF_STAT_LAB (1<<1)
+#define PCF_STAT_AAS (1<<2)
+#define PCF_STAT_AD0 (1<<3)
+#define PCF_STAT_LRB (1<<3)
+#define PCF_STAT_BER (1<<4)
+#define PCF_STAT_STS (1<<5)
+#define PCF_STAT_PIN (1<<7)
+
+void pcfiic_init(struct pcfiic_softc *);
+int pcfiic_i2c_acquire_bus(void *, int);
+void pcfiic_i2c_release_bus(void *, int);
+int pcfiic_i2c_exec(void *, i2c_op_t, i2c_addr_t, const void *,
+ size_t, void *, size_t, int);
+
+int pcfiic_xmit(struct pcfiic_softc *, u_int8_t, const u_int8_t *,
+ size_t);
+int pcfiic_recv(struct pcfiic_softc *, u_int8_t, u_int8_t *,
+ size_t);
+
+u_int8_t pcfiic_read(struct pcfiic_softc *, bus_size_t);
+void pcfiic_write(struct pcfiic_softc *, bus_size_t, u_int8_t);
+void pcfiic_choose_bus(struct pcfiic_softc *, u_int8_t);
+int pcfiic_wait_nBB(struct pcfiic_softc *);
+int pcfiic_wait_pin(struct pcfiic_softc *, volatile u_int8_t *);
-/*
- * Wait for an interrupt.
- */
-static void
-pcf8584_wait(struct pcf8584_handle *ha, int flags)
+void
+pcfiic_init(struct pcfiic_softc *sc)
{
- int timeo;
+ /* init S1 */
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_PIN);
+ /* own address */
+ pcfiic_write(sc, PCF_S0, sc->sc_addr);
+
+ /* select clock reg */
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_PIN|PCF_CTRL_ES1);
+ pcfiic_write(sc, PCF_S0, sc->sc_clock);
- if (flags & I2C_F_POLL) {
- timeo = 20;
- while (timeo && !PENDING()) {
- DELAY(1000);
- timeo--;
- }
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_IDLE);
+
+ delay(200000); /* Multi-Master mode, wait for longest i2c message */
+}
+
+void
+pcfiic_attach(struct pcfiic_softc *sc, i2c_addr_t addr, u_int8_t clock,
+ int swapregs)
+{
+ struct i2cbus_attach_args iba;
+
+ if (swapregs) {
+ sc->sc_regmap[PCF_S1] = PCF_S0;
+ sc->sc_regmap[PCF_S0] = PCF_S1;
} else {
- mutex_enter(&ha->ha_intrmtx);
- cv_timedwait(&ha->ha_intrcond, &ha->ha_intrmtx, mstohz(20));
- mutex_exit(&ha->ha_intrmtx);
+ sc->sc_regmap[PCF_S0] = PCF_S0;
+ sc->sc_regmap[PCF_S1] = PCF_S1;
}
+ sc->sc_clock = clock;
+ sc->sc_addr = addr;
+
+ pcfiic_init(sc);
+
+ printf("\n");
+
+ if (sc->sc_master)
+ pcfiic_choose_bus(sc, 0);
+
+ rw_init(&sc->sc_lock);
+ sc->sc_i2c.ic_cookie = sc;
+ sc->sc_i2c.ic_acquire_bus = pcfiic_i2c_acquire_bus;
+ sc->sc_i2c.ic_release_bus = pcfiic_i2c_release_bus;
+ sc->sc_i2c.ic_exec = pcfiic_i2c_exec;
+
+ bzero(&iba, sizeof(iba));
+ iba.iba_tag = &sc->sc_i2c;
+ config_found(sc->sc_dev, &iba, iicbus_print);
+}
+
+int
+pcfiic_intr(void *arg)
+{
+ return (0);
}
-#ifdef notyet
-static void
-pcf8584_intr(struct pcf8584_handle *ha) {
+int
+pcfiic_i2c_acquire_bus(void *arg, int flags)
+{
+ struct pcfiic_softc *sc = arg;
+
+ if (cold || sc->sc_poll || (flags & I2C_F_POLL))
+ return (0);
+
+ rw_enter(&sc->sc_lock, RW_WRITER);
+ return 0;
+}
+
+void
+pcfiic_i2c_release_bus(void *arg, int flags)
+{
+ struct pcfiic_softc *sc = arg;
+
+ if (cold || sc->sc_poll || (flags & I2C_F_POLL))
+ return;
- cv_wakeup(&ha->ha_intrcond);
+ rw_exit(&sc->sc_lock);
}
+
+int
+pcfiic_i2c_exec(void *arg, i2c_op_t op, i2c_addr_t addr,
+ const void *cmdbuf, size_t cmdlen, void *buf, size_t len, int flags)
+{
+ struct pcfiic_softc *sc = arg;
+ int ret = 0;
+
+#if 0
+ printf("%s: exec op: %d addr: 0x%x cmdlen: %d len: %d flags 0x%x\n",
+ sc->sc_dev.dv_xname, op, addr, cmdlen, len, flags);
#endif
+ if (cold || sc->sc_poll)
+ flags |= I2C_F_POLL;
+
+ if (sc->sc_master)
+ pcfiic_choose_bus(sc, addr >> 7);
+
+ if (cmdlen > 0)
+ if (pcfiic_xmit(sc, addr & 0x7f, cmdbuf, cmdlen) != 0)
+ return (1);
+
+ if (len > 0) {
+ if (I2C_OP_WRITE_P(op))
+ ret = pcfiic_xmit(sc, addr & 0x7f, buf, len);
+ else
+ ret = pcfiic_recv(sc, addr & 0x7f, buf, len);
+ }
+ return (ret);
+}
+
int
-pcf8584_init(struct pcf8584_handle *ha)
+pcfiic_xmit(struct pcfiic_softc *sc, u_int8_t addr, const u_int8_t *buf,
+ size_t len)
{
+ int i, err = 0;
+ volatile u_int8_t r;
- ha->ha_i2c.ic_cookie = ha;
- ha->ha_i2c.ic_acquire_bus = pcf8584_acquire_bus;
- ha->ha_i2c.ic_release_bus = pcf8584_release_bus;
- ha->ha_i2c.ic_exec = pcf8584_exec;
+ if (pcfiic_wait_nBB(sc) != 0)
+ return (1);
- mutex_init(&ha->ha_intrmtx, MUTEX_DEFAULT, IPL_NONE);
- cv_init(&ha->ha_intrcond, "pcf8584");
+ pcfiic_write(sc, PCF_S0, addr << 1);
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_START);
- pcf8584_bus_reset(ha, I2C_F_POLL);
+ for (i = 0; i <= len; i++) {
+ if (pcfiic_wait_pin(sc, &r) != 0) {
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_STOP);
+ return (1);
+ }
- return 0;
+ if (r & PCF_STAT_LRB) {
+ err = 1;
+ break;
+ }
+
+ if (i < len)
+ pcfiic_write(sc, PCF_S0, buf[i]);
+ }
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_STOP);
+ return (err);
}
-/*
- * Reset i2c bus.
- */
-static void
-pcf8584_bus_reset(struct pcf8584_handle *ha, int flags)
+int
+pcfiic_recv(struct pcfiic_softc *sc, u_int8_t addr, u_int8_t *buf, size_t len)
{
+ int i = 0, err = 0;
+ volatile u_int8_t r;
+
+ if (pcfiic_wait_nBB(sc) != 0)
+ return (1);
+
+ pcfiic_write(sc, PCF_S0, (addr << 1) | 0x01);
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_START);
- /* initialize PCF8584 */
- CSR_W(PCF8584_CTRL_PIN);
- DATA_W(0x55);
- CSR_W(PCF8584_CTRL_PIN | PCF8584_REG_S2);
- DATA_W(PCF8584_CLK_12 | PCF8584_SCL_90);
- CSR_W(PCF8584_CTRL_PIN | PCF8584_CTRL_ESO | PCF8584_CTRL_ACK);
-
- /* XXX needs multi-master synchronization delay here */
-
- /*
- * Blindly attempt a write at a nonexistent i2c address (0x7F).
- * This allows hung i2c devices to pick up the stop condition.
- */
- DATA_W(0x7F << 1);
- CSR_W(PCF8584_CMD_START);
- pcf8584_wait(ha, flags);
- CSR_W(PCF8584_CMD_STOP);
- pcf8584_wait(ha, flags);
-}
-
-static int
-pcf8584_exec(void *cookie, i2c_op_t op, i2c_addr_t addr,
- const void *cmdbuf, size_t cmdlen, void *buf,
- size_t len, int flags)
-{
- int i;
- struct pcf8584_handle *ha = cookie;
- uint8_t *p = buf;
-
- KASSERT(cmdlen == 0);
- KASSERT(op == I2C_OP_READ_WITH_STOP || op == I2C_OP_WRITE_WITH_STOP);
-
- if (BUSY()) {
- /* We're the only master on the bus, something is wrong. */
- printf("*%s: i2c bus busy!\n", device_xname(ha->ha_parent));
- pcf8584_bus_reset(ha, flags);
- }
- if (op == I2C_OP_READ_WITH_STOP)
- DATA_W((addr << 1) | 1);
- else
- DATA_W(addr << 1);
-
- CSR_W(PCF8584_CMD_START);
- pcf8584_wait(ha, flags);
- if (!PENDING()) {
- printf("%s: no intr after i2c sla\n", device_xname(ha->ha_parent));
- }
- if (NAK())
- goto fail;
-
- if (op == I2C_OP_READ_WITH_STOP) {
- (void) DATA_R();/* dummy read */
- for (i = 0; i < len; i++) {
- /* wait for a byte to arrive */
- pcf8584_wait(ha, flags);
- if (!PENDING()) {
- printf("%s: lost intr during i2c read\n",
- device_xname(ha->ha_parent));
- goto fail;
- }
- if (NAK())
- goto fail;
- if (i == len - 1) {
- /*
- * we're about to read the final byte, so we
- * set the controller to NAK the following
- * byte, if any.
- */
- CSR_W(PCF8584_CMD_NAK);
- }
- *p++ = DATA_R();
+ for (i = 0; i <= len; i++) {
+ if (pcfiic_wait_pin(sc, &r) != 0) {
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_STOP);
+ return (1);
}
- pcf8584_wait(ha, flags);
- if (!PENDING()) {
- printf("%s: no intr on final i2c nak\n",
- device_xname(ha->ha_parent));
- goto fail;
+
+ if ((i != len) && (r & PCF_STAT_LRB)) {
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_STOP);
+ return (1);
}
- CSR_W(PCF8584_CMD_STOP);
- (void) DATA_R();/* dummy read */
- } else {
- for (i = 0; i < len; i++) {
- DATA_W(*p++);
- pcf8584_wait(ha, flags);
- if (!PENDING()) {
- printf("%s: no intr during i2c write\n",
- device_xname(ha->ha_parent));
- goto fail;
- }
- if (NAK())
- goto fail;
+
+ if (i == len - 1) {
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_ESO);
+ } else if (i == len) {
+ pcfiic_write(sc, PCF_S1, PCF_CTRL_STOP);
}
- CSR_W(PCF8584_CMD_STOP);
+
+ r = pcfiic_read(sc, PCF_S0);
+ if (i > 0)
+ buf[i - 1] = r;
}
- pcf8584_wait(ha, flags);
- return 0;
-fail:
- CSR_W(PCF8584_CMD_STOP);
- pcf8584_wait(ha, flags);
+ return (err);
+}
- return 1;
+u_int8_t
+pcfiic_read(struct pcfiic_softc *sc, bus_size_t r)
+{
+ bus_space_barrier(sc->sc_iot, sc->sc_ioh, sc->sc_regmap[r], 1,
+ BUS_SPACE_BARRIER_READ);
+ return (bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->sc_regmap[r]));
}
-static int
-pcf8584_acquire_bus(void *cookie, int flags)
+void
+pcfiic_write(struct pcfiic_softc *sc, bus_size_t r, u_int8_t v)
{
+ bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->sc_regmap[r], v);
+ bus_space_barrier(sc->sc_iot, sc->sc_ioh, sc->sc_regmap[r], 1,
+ BUS_SPACE_BARRIER_WRITE);
+}
- /* XXX concurrent access not yet implemented */
- return 0;
+void
+pcfiic_choose_bus(struct pcfiic_softc *sc, u_int8_t bus)
+{
+ bus_space_write_1(sc->sc_iot, sc->sc_ioh2, 0, bus);
+ bus_space_barrier(sc->sc_iot, sc->sc_ioh2, 0, 1,
+ BUS_SPACE_BARRIER_WRITE);
}
-static void
-pcf8584_release_bus(void *cookie, int flags)
+int
+pcfiic_wait_nBB(struct pcfiic_softc *sc)
{
+ int i;
+
+ for (i = 0; i < 1000; i++) {
+ if (pcfiic_read(sc, PCF_S1) & PCF_STAT_nBB)
+ return (0);
+ delay(1000);
+ }
+ return (1);
+}
+int
+pcfiic_wait_pin(struct pcfiic_softc *sc, volatile u_int8_t *r)
+{
+ int i;
+
+ for (i = 0; i < 1000; i++) {
+ *r = pcfiic_read(sc, PCF_S1);
+ if ((*r & PCF_STAT_PIN) == 0)
+ return (0);
+ delay(1000);
+ }
+ return (1);
}
Index: src/sys/dev/ic/pcf8584var.h
diff -u src/sys/dev/ic/pcf8584var.h:1.3 src/sys/dev/ic/pcf8584var.h:1.4
--- src/sys/dev/ic/pcf8584var.h:1.3 Mon Apr 28 20:23:51 2008
+++ src/sys/dev/ic/pcf8584var.h Sun Feb 28 11:47:28 2010
@@ -1,42 +1,51 @@
-/* $NetBSD: pcf8584var.h,v 1.3 2008/04/28 20:23:51 martin Exp $ */
+/* $NetBSD: pcf8584var.h,v 1.4 2010/02/28 11:47:28 martin Exp $ */
+/* $OpenBSD: pcf8584var.h,v 1.5 2007/10/20 18:46:21 kettenis Exp $ */
-/*-
- * Copyright (c) 2007 The NetBSD Foundation, Inc.
- * All rights reserved.
+/*
+ * Copyright (c) 2006 David Gwynne <d...@openbsd.org>
*
- * This code is derived from software contributed to The NetBSD Foundation
- * by Tobias Nygren.
+ * 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.
*
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``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 THE FOUNDATION OR CONTRIBUTORS
- * 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.
+ * 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.
*/
-struct pcf8584_handle {
- device_t ha_parent;
- bus_space_tag_t ha_iot;
- bus_space_handle_t ha_ioh;
- struct i2c_controller ha_i2c;
+struct pcfiic_softc {
+ device_t sc_dev;
+
+ bus_space_tag_t sc_iot;
+ bus_space_handle_t sc_ioh;
+ bus_space_handle_t sc_ioh2;
+ int sc_master;
+ u_int8_t sc_addr;
+ u_int8_t sc_clock;
+ u_int8_t sc_regmap[2];
+
+ int sc_poll;
- kcondvar_t ha_intrcond;
- kmutex_t ha_intrmtx;
+ struct i2c_controller sc_i2c;
+ krwlock_t sc_lock;
};
-int pcf8584_init(struct pcf8584_handle *);
+/* clock divisor settings */
+#define PCF_CLOCK_3 0x00 /* 3 MHz */
+#define PCF_CLOCK_4_43 0x10 /* 4.43 MHz */
+#define PCF_CLOCK_6 0x14 /* 6 MHz */
+#define PCF_CLOCK_8 0x18 /* 8 MHz */
+#define PCF_CLOCK_12 0x1c /* 12 MHz */
+
+/* SCL frequency settings */
+#define PCF_FREQ_90 0x00 /* 90 kHz */
+#define PCF_FREQ_45 0x01 /* 45 kHz */
+#define PCF_FREQ_11 0x02 /* 11 kHz */
+#define PCF_FREQ_1_5 0x03 /* 1.5 kHz */
+
+void pcfiic_attach(struct pcfiic_softc *, i2c_addr_t, u_int8_t, int);
+int pcfiic_intr(void *);
