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[src/trunk]: src/sys/dev/i2c Add driver for Active-Semi ACT8846 Power Managem...
details: https://anonhg.NetBSD.org/src/rev/2bb4b1bd3200
branches: trunk
changeset: 335280:2bb4b1bd3200
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Thu Jan 01 17:33:18 2015 +0000
description:
Add driver for Active-Semi ACT8846 Power Management controller.
diffstat:
sys/dev/i2c/act8846.c | 366 ++++++++++++++++++++++++++++++++++++++++++++++++++
sys/dev/i2c/act8846.h | 41 +++++
sys/dev/i2c/files.i2c | 7 +-
3 files changed, 413 insertions(+), 1 deletions(-)
diffs (truncated from 433 to 300 lines):
diff -r 405a6affdaa8 -r 2bb4b1bd3200 sys/dev/i2c/act8846.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/act8846.c Thu Jan 01 17:33:18 2015 +0000
@@ -0,0 +1,366 @@
+/* $NetBSD: act8846.c,v 1.1 2015/01/01 17:33:18 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+#define ACT_DEBUG
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: act8846.c,v 1.1 2015/01/01 17:33:18 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/bus.h>
+#include <sys/kmem.h>
+
+#include <dev/i2c/i2cvar.h>
+#include <dev/i2c/act8846.h>
+
+#define ACT_BATTVOL_STATUS_REG 0x00
+#define ACT_THERMAL_CTRL_REG 0x01
+#define ACT_DCDC1_BASE_REG 0x10
+#define ACT_DCDC2_BASE_REG 0x20
+#define ACT_DCDC3_BASE_REG 0x30
+#define ACT_DCDC4_BASE_REG 0x40
+#define ACT_LDO1_BASE_REG 0x50
+#define ACT_LDO2_BASE_REG 0x58
+#define ACT_LDO3_BASE_REG 0x60
+#define ACT_LDO4_BASE_REG 0x68
+#define ACT_LDO5_BASE_REG 0x70
+#define ACT_LDO6_BASE_REG 0x80
+#define ACT_LDO7_BASE_REG 0x90
+#define ACT_LDO8_BASE_REG 0xa0
+#define ACT_LDO9_BASE_REG 0xb0
+
+#define ACT_VSET0_OFFSET 0
+#define ACT_VSET1_OFFSET 1
+#define ACT_DCDC_CTRL_OFFSET 2
+#define ACT_LDO_CTRL_OFFSET 1
+
+#define ACT_VSET_VSET __BITS(5,0)
+
+#define ACT_DCDC_CTRL_ON __BIT(7)
+
+#define ACT_LDO_CTRL_ON __BIT(7)
+
+enum act8846_ctrl_type {
+ ACT_CTRL_DCDC,
+ ACT_CTRL_LDO,
+};
+
+#define ACT_VOLTAGE_MIN 600
+#define ACT_VOLTAGE_MAX 3900
+
+struct act8846_ctrl {
+ device_t c_dev;
+
+ const char * c_name;
+ u_int c_min;
+ u_int c_max;
+ uint8_t c_base;
+ enum act8846_ctrl_type c_type;
+};
+
+#define ACT_CTRL(name, base, type) \
+ { .c_name = (name), \
+ .c_min = ACT_VOLTAGE_MIN, .c_max = ACT_VOLTAGE_MAX, \
+ .c_base = ACT_ ## base ## _BASE_REG, .c_type = (type) }
+
+#define ACT_DCDC(name, base) ACT_CTRL(name, base, ACT_CTRL_DCDC)
+#define ACT_LDO(name, base) ACT_CTRL(name, base, ACT_CTRL_LDO)
+
+static const struct act8846_ctrl act8846_ctrls[] = {
+ ACT_DCDC("DCDC1", DCDC1), /* VCC_DDR */
+ ACT_DCDC("DCDC2", DCDC2), /* VDD_LOG */
+ ACT_DCDC("DCDC3", DCDC3), /* VDD_ARM */
+ ACT_DCDC("DCDC4", DCDC4), /* VCC_IO */
+ ACT_LDO("LDO1", LDO1), /* VDD_10 */
+ ACT_LDO("LDO2", LDO2), /* VCC_25 */
+ ACT_LDO("LDO3", LDO3), /* VCC18_CIF */
+ ACT_LDO("LDO4", LDO4), /* VCCA_33 */
+ ACT_LDO("LDO5", LDO5), /* VCC_TOUCH */
+ ACT_LDO("LDO6", LDO6), /* VCC33 */
+ ACT_LDO("LDO7", LDO7), /* VCC18_IO */
+ ACT_LDO("LDO8", LDO8), /* VCC28_CIF */
+#if 0
+ ACT_LDO("LDO9", LDO9), /* VDD_RTC (Always-ON) */
+#endif
+};
+
+/* From datasheet, Table 5: REGx/VSET[] Output Voltage Setting */
+static const u_int act8846_vset[] = {
+ 600, 625, 650, 675, 700, 725, 750, 775,
+ 800, 825, 850, 875, 900, 925, 950, 975,
+ 1000, 1025, 1050, 1075, 1100, 1125, 1150, 1175,
+ 1200, 1250, 1300, 1350, 1400, 1450, 1500, 1550,
+ 1600, 1650, 1700, 1750, 1800, 1850, 1900, 1950,
+ 2000, 2050, 2100, 2150, 2200, 2250, 2300, 2350,
+ 2400, 2500, 2600, 2700, 2800, 2900, 3000, 3100,
+ 3200, 3300, 3400, 3500, 3600, 3700, 3800, 3900
+};
+
+struct act8846_softc {
+ device_t sc_dev;
+ i2c_tag_t sc_i2c;
+ i2c_addr_t sc_addr;
+
+ u_int sc_nctrl;
+ struct act8846_ctrl *sc_ctrl;
+};
+
+static int act8846_match(device_t, cfdata_t, void *);
+static void act8846_attach(device_t, device_t, void *);
+
+static int act8846_read(struct act8846_softc *, uint8_t, uint8_t *);
+static int act8846_write(struct act8846_softc *, uint8_t, uint8_t);
+
+static void act8846_print(struct act8846_ctrl *c);
+
+CFATTACH_DECL_NEW(act8846pm, sizeof(struct act8846_softc),
+ act8846_match, act8846_attach, NULL, NULL);
+
+static int
+act8846_match(device_t parent, cfdata_t match, void *aux)
+{
+ return 1;
+}
+
+static void
+act8846_attach(device_t parent, device_t self, void *aux)
+{
+ struct act8846_softc *sc = device_private(self);
+ struct i2c_attach_args *ia = aux;
+ u_int n;
+
+ sc->sc_dev = self;
+ sc->sc_i2c = ia->ia_tag;
+ sc->sc_addr = ia->ia_addr;
+
+ aprint_naive("\n");
+ aprint_normal("\n");
+
+ sc->sc_nctrl = __arraycount(act8846_ctrls);
+ sc->sc_ctrl = kmem_alloc(sizeof(act8846_ctrls), KM_SLEEP);
+ memcpy(sc->sc_ctrl, act8846_ctrls, sizeof(act8846_ctrls));
+ for (n = 0; n < sc->sc_nctrl; n++) {
+ sc->sc_ctrl[n].c_dev = self;
+ }
+
+#ifdef ACT_DEBUG
+ for (n = 0; n < sc->sc_nctrl; n++) {
+ act8846_print(&sc->sc_ctrl[n]);
+ }
+#endif
+}
+
+static int
+act8846_read(struct act8846_softc *sc, uint8_t reg, uint8_t *val)
+{
+ return iic_smbus_read_byte(sc->sc_i2c, sc->sc_addr, reg, val,
+ cold ? I2C_F_POLL : 0);
+}
+
+static int
+act8846_write(struct act8846_softc *sc, uint8_t reg, uint8_t val)
+{
+ return iic_smbus_write_byte(sc->sc_i2c, sc->sc_addr, reg, val,
+ cold ? I2C_F_POLL : 0);
+}
+
+static void
+act8846_print(struct act8846_ctrl *c)
+{
+ struct act8846_softc *sc = device_private(c->c_dev);
+ u_int voltage;
+ bool enabled;
+
+ device_printf(sc->sc_dev, "%s:", c->c_name);
+ if (act8846_get_voltage(c, &voltage)) {
+ printf(" [??? V]");
+ } else {
+ printf(" [%d.%03dV]", voltage / 1000,
+ voltage % 1000);
+ }
+ if (act8846_is_enabled(c, &enabled)) {
+ printf(" [unknown state]");
+ } else {
+ printf(" [%s]", enabled ? "ON" : "OFF");
+ }
+ printf("\n");
+}
+
+struct act8846_ctrl *
+act8846_lookup(device_t dev, const char *name)
+{
+ struct act8846_softc *sc = device_private(dev);
+ struct act8846_ctrl *c;
+ u_int n;
+
+ for (n = 0; n < sc->sc_nctrl; n++) {
+ c = &sc->sc_ctrl[n];
+ if (strcmp(c->c_name, name) == 0) {
+ return c;
+ }
+ }
+
+ return NULL;
+}
+
+int
+act8846_set_voltage(struct act8846_ctrl *c, u_int min, u_int max)
+{
+ struct act8846_softc *sc = device_private(c->c_dev);
+ uint8_t val;
+ int error, n;
+
+ if (min < c->c_min || min > c->c_max || (min % 25) != 0)
+ return EINVAL;
+
+ for (n = 0; n < __arraycount(act8846_vset); n++) {
+ if (min >= act8846_vset[n] && max <= act8846_vset[n]) {
+ break;
+ }
+ }
+ if (n == __arraycount(act8846_vset))
+ return EINVAL;
+
+ val = __SHIFTIN(act8846_vset[n], ACT_VSET_VSET);
+
+ iic_acquire_bus(sc->sc_i2c, 0);
+ error = act8846_write(sc, c->c_base + ACT_VSET0_OFFSET, val);
+ iic_release_bus(sc->sc_i2c, 0);
+#ifdef ACT_DEBUG
+ if (error == 0)
+ act8846_print(c);
+#endif
+ return error;
+}
+
+int
+act8846_get_voltage(struct act8846_ctrl *c, u_int *pvol)
+{
+ struct act8846_softc *sc = device_private(c->c_dev);
+ uint8_t val;
+ int error;
+
+ iic_acquire_bus(sc->sc_i2c, 0);
+ error = act8846_read(sc, c->c_base + ACT_VSET0_OFFSET, &val);
+ iic_release_bus(sc->sc_i2c, 0);
+ if (error)
+ return error;
+
+ *pvol = act8846_vset[__SHIFTOUT(val, ACT_VSET_VSET)];
+
+ return 0;
+}
+
+int
+act8846_is_enabled(struct act8846_ctrl *c, bool *penabled)
+{
+ struct act8846_softc *sc = device_private(c->c_dev);
+ uint8_t val, regoff, regmask;
+ int error;
+
+ if (c->c_type == ACT_CTRL_DCDC) {
+ regoff = ACT_DCDC_CTRL_OFFSET;
+ regmask = ACT_DCDC_CTRL_ON;
+ } else {
+ regoff = ACT_LDO_CTRL_OFFSET;
+ regmask = ACT_LDO_CTRL_ON;
+ }
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