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[src/khorben-n900]: src/sys/dev/i2c Initial import of the lp5523led(4) driver...
details: https://anonhg.NetBSD.org/src/rev/e070bf1c6055
branches: khorben-n900
changeset: 786712:e070bf1c6055
user: khorben <khorben%NetBSD.org@localhost>
date: Thu May 16 15:36:50 2013 +0000
description:
Initial import of the lp5523led(4) driver, a programmable 9-output LED
driver from Texas Instruments. This is not functional yet, but exposes
sysctl nodes and the internal temperature sensor (not refreshed at the
moment).
Tested on my Nokia N900 smartphone.
diffstat:
sys/dev/i2c/files.i2c | 6 +-
sys/dev/i2c/lp5523.c | 255 ++++++++++++++++++++++++++++++++++++++++++++++++
sys/dev/i2c/lp5523reg.h | 142 ++++++++++++++++++++++++++
3 files changed, 402 insertions(+), 1 deletions(-)
diffs (truncated from 422 to 300 lines):
diff -r bf2eacff17cb -r e070bf1c6055 sys/dev/i2c/files.i2c
--- a/sys/dev/i2c/files.i2c Wed May 15 23:27:49 2013 +0000
+++ b/sys/dev/i2c/files.i2c Thu May 16 15:36:50 2013 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.i2c,v 1.49.2.3 2013/05/12 01:49:44 khorben Exp $
+# $NetBSD: files.i2c,v 1.49.2.4 2013/05/16 15:36:50 khorben Exp $
obsolete defflag opt_i2cbus.h I2C_SCAN
define i2cbus { }
@@ -187,3 +187,7 @@
attach mcp980x at iic
file dev/i2c/mcp980x.c mcp980x
+# TI LP5523 LED driver
+device lp5523led: sysmon_envsys
+attach lp5523led at iic
+file dev/i2c/lp5523.c lp5523led
diff -r bf2eacff17cb -r e070bf1c6055 sys/dev/i2c/lp5523.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/lp5523.c Thu May 16 15:36:50 2013 +0000
@@ -0,0 +1,255 @@
+/* $NetBSD: lp5523.c,v 1.1.2.1 2013/05/16 15:36:50 khorben Exp $ */
+
+/*
+ * Texas Instruments LP5523 Programmable 9-Output LED Driver
+ *
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Pierre Pronchery (khorben%defora.org@localhost).
+ *
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: lp5523.c,v 1.1.2.1 2013/05/16 15:36:50 khorben Exp $");
+
+#include <sys/param.h>
+#include <sys/device.h>
+#include <sys/sysctl.h>
+
+#include <dev/sysmon/sysmonvar.h>
+
+#include <dev/i2c/i2cvar.h>
+
+#include <dev/i2c/lp5523reg.h>
+
+#define LP5523_DEGC2UK(t) ((t * 1000000) + 273150000)
+
+/* constants */
+enum lp5523_leds {
+ LP5523_LED_0 = 0,
+ LP5523_LED_1,
+ LP5523_LED_2,
+ LP5523_LED_3,
+ LP5523_LED_4,
+ LP5523_LED_5,
+ LP5523_LED_6,
+ LP5523_LED_7,
+ LP5523_LED_8
+};
+#define LP5523_LED_LAST LP5523_LED_8
+#define LP5523_LED_CNT (LP5523_LED_LAST + 1)
+
+/* variables */
+struct lp5523_softc {
+ device_t sc_dev;
+ i2c_tag_t sc_i2c;
+ i2c_addr_t sc_addr;
+
+ struct sysctllog *sc_sysctllog;
+
+ /* temperature sensor */
+ struct sysmon_envsys *sc_sme;
+ envsys_data_t sc_temp_sensor;
+};
+
+static int lp5523_match(device_t, cfdata_t, void *);
+static void lp5523_attach(device_t, device_t, void *);
+static void lp5523_attach_envsys(struct lp5523_softc *);
+static void lp5523_attach_sysctl(struct lp5523_softc *);
+
+static int lp5523_reset(struct lp5523_softc *);
+
+static int lp5523_sysctl(SYSCTLFN_ARGS);
+
+static int lp5523_read_1(struct lp5523_softc *, uint8_t, uint8_t *);
+static int lp5523_write_1(struct lp5523_softc *, uint8_t, uint8_t);
+
+CFATTACH_DECL_NEW(lp5523led, sizeof(struct lp5523_softc),
+ lp5523_match, lp5523_attach, NULL, NULL);
+
+static int
+lp5523_match(device_t parent, cfdata_t match, void *aux)
+{
+ return 1;
+}
+
+static void
+lp5523_attach(device_t parent, device_t self, void *aux)
+{
+ struct lp5523_softc *sc = device_private(self);
+ struct i2c_attach_args *ia = aux;
+
+ sc->sc_dev = self;
+ sc->sc_i2c = ia->ia_tag;
+ sc->sc_addr = ia->ia_addr;
+
+ lp5523_reset(sc);
+
+ aprint_normal(": LED driver\n");
+ aprint_naive(": LED driver\n");
+
+ lp5523_attach_sysctl(sc);
+
+ lp5523_attach_envsys(sc);
+
+ if (!pmf_device_register(sc->sc_dev, NULL, NULL)) {
+ aprint_error_dev(sc->sc_dev,
+ "could not establish power handler\n");
+ }
+}
+
+static void
+lp5523_attach_envsys(struct lp5523_softc *sc)
+{
+ const int flags = ENVSYS_FMONNOTSUPP | ENVSYS_FHAS_ENTROPY
+ | ENVSYS_FVALID_MIN | ENVSYS_FVALID_MAX;
+ int8_t s8;
+
+ sc->sc_sme = sysmon_envsys_create();
+
+ sc->sc_sme->sme_cookie = sc;
+ sc->sc_sme->sme_name = device_xname(sc->sc_dev);
+ sc->sc_sme->sme_flags = SME_DISABLE_REFRESH;
+
+ sc->sc_temp_sensor.flags = flags;
+ sc->sc_temp_sensor.units = ENVSYS_STEMP;
+ sc->sc_temp_sensor.state = ENVSYS_SINVALID;
+ sc->sc_temp_sensor.value_min = LP5523_DEGC2UK(-41);
+ sc->sc_temp_sensor.value_max = LP5523_DEGC2UK(89);
+
+ strlcat(sc->sc_temp_sensor.desc, "temperature",
+ sizeof(sc->sc_temp_sensor.desc));
+
+ if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_temp_sensor) != 0
+ || sysmon_envsys_register(sc->sc_sme) != 0)
+ {
+ aprint_error_dev(sc->sc_dev, "unable to attach the temperature"
+ " sensor\n");
+ sysmon_envsys_destroy(sc->sc_sme);
+ sc->sc_sme = NULL;
+ return;
+ }
+
+ iic_acquire_bus(sc->sc_i2c, 0);
+ lp5523_read_1(sc, LP5523_REG_TEMP_READ, &s8);
+ iic_release_bus(sc->sc_i2c, 0);
+ if (s8 >= -41 && s8 <= 89) {
+ sc->sc_temp_sensor.state = ENVSYS_SVALID;
+ sc->sc_temp_sensor.value_cur = LP5523_DEGC2UK(s8);
+ }
+}
+
+static void
+lp5523_attach_sysctl(struct lp5523_softc *sc)
+{
+ struct sysctllog **log = &sc->sc_sysctllog;
+ const struct sysctlnode *rnode, *cnode;
+ unsigned int i;
+ char buf[8];
+ int error;
+
+ error = sysctl_createv(log, 0, NULL, &rnode, CTLFLAG_PERMANENT,
+ CTLTYPE_NODE, "hw", NULL, NULL, 0, NULL, 0, CTL_HW,
+ CTL_EOL);
+ if (error)
+ return;
+
+ error = sysctl_createv(log, 0, &rnode, &rnode, CTLFLAG_PERMANENT,
+ CTLTYPE_NODE, device_xname(sc->sc_dev),
+ SYSCTL_DESCR("lp5523led control"), NULL, 0, NULL, 0,
+ CTL_CREATE, CTL_EOL);
+ if (error)
+ return;
+
+ for (i = 0; i < LP5523_LED_CNT; i++) {
+ snprintf(buf, sizeof(buf), "led%u", i);
+ error = sysctl_createv(log, 0, &rnode, &cnode,
+ CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
+ CTLTYPE_INT, buf, SYSCTL_DESCR("LED enable"),
+ lp5523_sysctl, 0, (void *)sc, 0, CTL_CREATE,
+ CTL_EOL);
+ if (error)
+ break;
+ }
+}
+
+static int
+lp5523_reset(struct lp5523_softc *sc)
+{
+ uint8_t u8;
+
+ iic_acquire_bus(sc->sc_i2c, 0);
+ lp5523_write_1(sc, LP5523_REG_RESET, 0xff);
+
+ u8 = LP5523_REG_ENGINE_CNTRL1_CHIP_EN;
+ lp5523_write_1(sc, LP5523_REG_ENGINE_CNTRL1, u8);
+ iic_release_bus(sc->sc_i2c, 0);
+
+ return 0;
+}
+
+static int
+lp5523_sysctl(SYSCTLFN_ARGS)
+{
+ struct lp5523_softc *sc;
+ struct sysctlnode node;
+ u_int led;
+ int error;
+
+ node = *rnode;
+ sc = node.sysctl_data;
+ iic_acquire_bus(sc->sc_i2c, 0);
+ /* FIXME really implement */
+ led = 0;
+ iic_release_bus(sc->sc_i2c, 0);
+
+ node.sysctl_data = &led;
+ error = sysctl_lookup(SYSCTLFN_CALL(&node));
+ if (error || newp == NULL)
+ return error;
+
+ iic_acquire_bus(sc->sc_i2c, 0);
+ /* FIXME really implement */
+ error = 0;
+ iic_release_bus(sc->sc_i2c, 0);
+
+ return error;
+}
+
+static int
+lp5523_read_1(struct lp5523_softc *sc, uint8_t reg, uint8_t *val)
+{
+ return iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP, sc->sc_addr,
+ ®, sizeof(reg), val, sizeof(*val), 0);
+}
+
+static int
+lp5523_write_1(struct lp5523_softc *sc, uint8_t reg, uint8_t val)
+{
+ uint8_t data[2] = { reg, val };
+
+ return iic_exec(sc->sc_i2c, I2C_OP_WRITE_WITH_STOP, sc->sc_addr,
+ NULL, 0, data, sizeof(data), 0);
+}
diff -r bf2eacff17cb -r e070bf1c6055 sys/dev/i2c/lp5523reg.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/lp5523reg.h Thu May 16 15:36:50 2013 +0000
@@ -0,0 +1,142 @@
+/* $NetBSD: lp5523reg.h,v 1.1.2.1 2013/05/16 15:36:50 khorben Exp $ */
+
+/*
+ * Texas Instruments LP5523 Programmable 9-Output LED Driver
+ *
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Pierre Pronchery (khorben%defora.org@localhost).
+ *
+ * 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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