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[src/trunk]: src/sys/dev/i2c Add G760a fan speed controller driver.
details: https://anonhg.NetBSD.org/src/rev/c90d0f8a5634
branches: trunk
changeset: 757888:c90d0f8a5634
user: kiyohara <kiyohara%NetBSD.org@localhost>
date: Sat Oct 02 06:07:37 2010 +0000
description:
Add G760a fan speed controller driver.
diffstat:
sys/dev/i2c/files.i2c | 7 +-
sys/dev/i2c/g760a.c | 261 +++++++++++++++++++++++++++++++++++++++++++++++++
sys/dev/i2c/g760areg.h | 53 +++++++++
3 files changed, 320 insertions(+), 1 deletions(-)
diffs (truncated from 340 to 300 lines):
diff -r 08a215fab0f3 -r c90d0f8a5634 sys/dev/i2c/files.i2c
--- a/sys/dev/i2c/files.i2c Sat Oct 02 05:57:42 2010 +0000
+++ b/sys/dev/i2c/files.i2c Sat Oct 02 06:07:37 2010 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.i2c,v 1.27 2010/03/24 00:31:41 pgoyette Exp $
+# $NetBSD: files.i2c,v 1.28 2010/10/02 06:07:37 kiyohara Exp $
defflag opt_i2cbus.h I2C_SCAN
define i2cbus { }
@@ -119,3 +119,8 @@
device smscmon: sysmon_envsys
attach smscmon at iic
file dev/i2c/smscmon.c smscmon
+
+# G760a FAN controller
+device g760a: sysmon_envsys
+attach g760a at iic
+file dev/i2c/g760a.c g760a
diff -r 08a215fab0f3 -r c90d0f8a5634 sys/dev/i2c/g760a.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/g760a.c Sat Oct 02 06:07:37 2010 +0000
@@ -0,0 +1,261 @@
+/* $NetBSD: g760a.c,v 1.1 2010/10/02 06:07:37 kiyohara Exp $ */
+
+/*-
+ * Copyright (C) 2008 A.Leo.
+ *
+ * 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. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 driver for the G760A FAN Speed PWM controller.
+ */
+
+#include <sys/cdefs.h>
+
+__KERNEL_RCSID(0, "$NetBSD: g760a.c,v 1.1 2010/10/02 06:07:37 kiyohara Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/kernel.h>
+#include <sys/conf.h>
+#include <sys/sysctl.h>
+
+#include <dev/sysmon/sysmonvar.h>
+
+#include <dev/i2c/i2cvar.h>
+#include <dev/i2c/g760areg.h>
+
+
+struct g760a_softc {
+ device_t sc_dev;
+ struct sysmon_envsys *sc_sme;
+
+ envsys_data_t sc_sensor;
+ i2c_tag_t sc_tag;
+ int sc_addr;
+};
+
+static int g760a_match(device_t, struct cfdata*, void*);
+static void g760a_attach(device_t, device_t, void*);
+static void g760a_setup(struct g760a_softc*);
+static uint8_t g760a_readreg(struct g760a_softc*, uint8_t);
+static void g760a_writereg(struct g760a_softc*, uint8_t, uint8_t);
+
+static int g760a_reg2rpm(int);
+
+static void g760a_refresh(struct sysmon_envsys*, envsys_data_t*);
+static int sysctl_g760a_rpm(SYSCTLFN_PROTO);
+
+CFATTACH_DECL_NEW(g760a, sizeof(struct g760a_softc),
+ g760a_match, g760a_attach, NULL, NULL);
+
+static int
+g760a_match(device_t parent, struct cfdata* cf, void* arg)
+{
+ struct i2c_attach_args* ia = arg;
+
+ if (ia->ia_addr == G760A_ADDR) {
+ /*
+ * TODO: set up minimal speed?
+ */
+ return 1;
+ }
+
+ return 0;
+}
+
+
+static void
+g760a_attach(device_t parent, device_t self, void* arg)
+{
+ struct i2c_attach_args* ia = arg;
+ struct g760a_softc* sc = device_private(self);
+
+ aprint_normal(": G760A Fan Controller\n");
+
+ sc->sc_dev = self;
+ sc->sc_tag = ia->ia_tag;
+ sc->sc_addr = ia->ia_addr;
+
+ g760a_setup(sc);
+}
+
+
+static int
+g760a_reg2rpm(int n)
+{
+ if(n == 255)
+ return 0;
+
+ if(n == 0)
+ return 255;
+
+ return G760A_N2RPM(n);
+}
+
+
+static uint8_t
+g760a_readreg(struct g760a_softc* sc, uint8_t reg)
+{
+ uint8_t data;
+
+ if (iic_acquire_bus(sc->sc_tag, 0)) {
+ aprint_error_dev(sc->sc_dev, "unable to acquire the iic bus\n");
+ return 0;
+ }
+
+ iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, ®, 1,
+ &data, 1, 0);
+ iic_release_bus(sc->sc_tag, 0);
+
+ return data;
+}
+
+
+static void
+g760a_writereg(struct g760a_softc* sc, uint8_t reg, uint8_t data)
+{
+
+ if (iic_acquire_bus(sc->sc_tag, 0)) {
+ aprint_error_dev(sc->sc_dev, "unable to acquire the iic bus\n");
+ return;
+ }
+
+ iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, ®, 1,
+ &data, 1, 0);
+ iic_release_bus(sc->sc_tag, 0);
+}
+
+
+SYSCTL_SETUP(sysctl_g760a_setup, "sysctl g760a subtree setup")
+{
+
+ sysctl_createv(NULL, 0, NULL, NULL,
+ CTLFLAG_PERMANENT,
+ CTLTYPE_NODE, "machdep", NULL,
+ NULL, 0, NULL, 0,
+ CTL_MACHDEP, CTL_EOL);
+}
+
+
+/*ARGUSED*/
+static int
+sysctl_g760a_rpm(SYSCTLFN_ARGS)
+{
+ int error, t;
+ struct sysctlnode node;
+ struct g760a_softc* sc;
+
+ node = *rnode;
+ sc = node.sysctl_data;
+
+ t = g760a_readreg(sc, G760A_REG_SET_CNT);
+ t = g760a_reg2rpm(t);
+
+ node.sysctl_data = &t;
+
+ error = sysctl_lookup(SYSCTLFN_CALL(&node));
+
+ if (error || newp == NULL)
+ return error;
+
+ if (t > 20000 || t < G760A_N2RPM(254))
+ return EINVAL;
+
+ t = g760a_reg2rpm(t);
+
+ g760a_writereg(sc, G760A_REG_SET_CNT, t);
+
+ return 0;
+}
+
+
+static void
+g760a_refresh(struct sysmon_envsys* sme, envsys_data_t* edata)
+{
+ struct g760a_softc* sc = sme->sme_cookie;
+
+ switch (edata->units) {
+ case ENVSYS_SFANRPM:
+ {
+ uint8_t n;
+
+ n = g760a_readreg(sc, G760A_REG_ACT_CNT);
+ edata->value_cur = g760a_reg2rpm(n);
+ }
+ break;
+ default:
+ aprint_error_dev(sc->sc_dev, "oops\n");
+ }
+
+ edata->state = ENVSYS_SVALID;
+}
+
+
+static void
+g760a_setup(struct g760a_softc* sc)
+{
+ int error;
+ int ret;
+ struct sysctlnode* me = NULL, * node = NULL;
+
+ sc->sc_sme = sysmon_envsys_create();
+
+ ret = sysctl_createv(NULL, 0, NULL, (const struct sysctlnode**)&me,
+ CTLFLAG_READWRITE,
+ CTLTYPE_NODE, device_xname(sc->sc_dev), NULL,
+ NULL, 0, NULL, 0,
+ CTL_MACHDEP, CTL_CREATE, CTL_EOL);
+
+ (void)strlcpy(sc->sc_sensor.desc, "sysfan rpm",
+ sizeof(sc->sc_sensor.desc));
+ sc->sc_sensor.units = ENVSYS_SFANRPM;
+
+ if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor))
+ goto out;
+
+ ret = sysctl_createv(NULL, 0, NULL, (const struct sysctlnode**)&node,
+ CTLFLAG_READWRITE,
+ CTLTYPE_INT, "rpm", sc->sc_sensor.desc,
+ sysctl_g760a_rpm, 0x42, NULL, 0,
+ CTL_MACHDEP, me->sysctl_num, CTL_CREATE, CTL_EOL);
+ if (node != NULL)
+ node->sysctl_data = sc;
+
+ sc->sc_sme->sme_name = device_xname(sc->sc_dev);
+ sc->sc_sme->sme_cookie = sc;
+ sc->sc_sme->sme_refresh = g760a_refresh;
+
+ error = sysmon_envsys_register(sc->sc_sme);
+
+ if (error) {
+ aprint_error_dev(sc->sc_dev,
+ "unable to register with sysmon. errorcode %i\n", error);
+ goto out;
+ }
+
+ return;
+out:
+ sysmon_envsys_destroy(sc->sc_sme);
+}
diff -r 08a215fab0f3 -r c90d0f8a5634 sys/dev/i2c/g760areg.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/g760areg.h Sat Oct 02 06:07:37 2010 +0000
@@ -0,0 +1,53 @@
+/* $NetBSD: g760areg.h,v 1.1 2010/10/02 06:07:37 kiyohara Exp $ */
+
+/*-
+ * Copyright (C) 2008 A.Leo.
+ *
+ * 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.
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