405 lines
10 KiB
C
405 lines
10 KiB
C
/* $NetBSD: axp806.c,v 1.1 2014/12/07 00:33:26 jmcneill Exp $ */
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/*-
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* Copyright (c) 2014 Jared D. McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define AXP_DEBUG
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: axp806.c,v 1.1 2014/12/07 00:33:26 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/conf.h>
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#include <sys/bus.h>
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#include <sys/kmem.h>
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#include <dev/i2c/i2cvar.h>
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#include <dev/i2c/axp806.h>
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#define AXP_STARTUP_SOURCE_REG 0x00
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#define AXP_IC_TYPE_REG 0x03
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#define AXP_DATA0_REG 0x04
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#define AXP_DATA1_REG 0x05
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#define AXP_DATA2_REG 0x06
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#define AXP_DATA3_REG 0x07
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#define AXP_OUT_CTRL1_REG 0x10
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#define AXP_OUT_CTRL2_REG 0x11
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#define AXP_DCDCA_CTRL_REG 0x12
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#define AXP_DCDCB_CTRL_REG 0x13
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#define AXP_DCDCC_CTRL_REG 0x14
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#define AXP_DCDCD_CTRL_REG 0x15
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#define AXP_DCDCE_CTRL_REG 0x16
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#define AXP_ALDO1_CTRL_REG 0x17
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#define AXP_ALDO2_CTRL_REG 0x18
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#define AXP_ALDO3_CTRL_REG 0x19
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#define AXP_DCDC_MODE_CTRL1_REG 0x1a
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#define AXP_DCDC_MODE_CTRL2_REG 0x1b
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#define AXP_DCDC_FREQ_REG 0x1c
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#define AXP_OUTPUT_MON_CTRL_REG 0x1d
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#define AXP_IRQ_PWROK_REG 0x1f
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#define AXP_BLDO1_CTRL_REG 0x20
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#define AXP_BLDO2_CTRL_REG 0x21
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#define AXP_BLDO3_CTRL_REG 0x22
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#define AXP_BLDO4_CTRL_REG 0x23
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#define AXP_CLDO1_CTRL_REG 0x24
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#define AXP_CLDO2_CTRL_REG 0x25
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#define AXP_CLDO3_CTRL_REG 0x26
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#define AXP_POWER_WAKE_CTRL_REG 0x31
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#define AXP_POWER_DISABLE_REG 0x32
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#define AXP_WAKEUP_PINFUNC_REG 0x35
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#define AXP_POK_SETTING_REG 0x36
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#define AXP_MODE_SEL_REG 0x3e
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#define AXP_SPECIAL_CTRL_REG 0x3f
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#define AXP_IRQ_ENABLE1_REG 0x40
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#define AXP_IRQ_ENABLE2_REG 0x41
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#define AXP_IRQ_STATUS1_REG 0x48
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#define AXP_IRQ_STATUS2_REG 0x49
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#define AXP_VREF_TEMP_WARN_REG 0xf3
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#define AXP_SI_ADDR_EXT_REG 0xfe
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#define AXP_REG_ADDR_EXT_REG 0xff
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struct axp806_ctrl {
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device_t c_dev;
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const char * c_name;
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u_int c_min;
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u_int c_max;
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u_int c_step1;
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u_int c_step1cnt;
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u_int c_step2;
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u_int c_step2cnt;
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uint8_t c_enable_reg;
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uint8_t c_enable_mask;
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uint8_t c_voltage_reg;
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uint8_t c_voltage_mask;
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};
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#define AXP_CTRL(name, min, max, step, ereg, emask, vreg, vmask) \
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{ .c_name = (name), .c_min = (min), .c_max = (max), \
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.c_step1 = (step), .c_step1cnt = (((max) - (min)) / (step)) + 1, \
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.c_step2 = 0, .c_step2cnt = 0, \
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.c_enable_reg = AXP_##ereg##_REG, .c_enable_mask = (emask), \
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.c_voltage_reg = AXP_##vreg##_REG, .c_voltage_mask = (vmask) }
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#define AXP_CTRL2(name, min, max, step1, step1cnt, step2, step2cnt, ereg, emask, vreg, vmask) \
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{ .c_name = (name), .c_min = (min), .c_max = (max), \
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.c_step1 = (step1), .c_step1cnt = (step1cnt), \
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.c_step2 = (step2), .c_step2cnt = (step2cnt), \
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.c_enable_reg = AXP_##ereg##_REG, .c_enable_mask = (emask), \
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.c_voltage_reg = AXP_##vreg##_REG, .c_voltage_mask = (vmask) }
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static const struct axp806_ctrl axp806_ctrls[] = {
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AXP_CTRL2("DCDCA", 600, 1520, 10, 51, 20, 21,
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OUT_CTRL1, __BIT(0), DCDCA_CTRL, __BITS(6,0)),
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AXP_CTRL("DCDCB", 1000, 2550, 50,
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OUT_CTRL1, __BIT(1), DCDCB_CTRL, __BITS(4,0)),
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AXP_CTRL2("DCDCC", 600, 1520, 10, 51, 20, 21,
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OUT_CTRL1, __BIT(2), DCDCC_CTRL, __BITS(6,0)),
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AXP_CTRL2("DCDCD", 600, 3300, 20, 46, 100, 18,
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OUT_CTRL1, __BIT(3), DCDCD_CTRL, __BITS(5,0)),
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AXP_CTRL("DCDCE", 1100, 3400, 100,
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OUT_CTRL1, __BIT(4), DCDCE_CTRL, __BITS(4,0)),
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AXP_CTRL("ALDO1", 700, 3300, 100,
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OUT_CTRL1, __BIT(5), ALDO1_CTRL, __BITS(4,0)),
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AXP_CTRL("ALDO2", 700, 3400, 100,
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OUT_CTRL1, __BIT(6), ALDO2_CTRL, __BITS(4,0)),
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AXP_CTRL("ALDO3", 700, 3300, 100,
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OUT_CTRL1, __BIT(7), ALDO3_CTRL, __BITS(4,0)),
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AXP_CTRL("BLDO1", 700, 1900, 100,
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OUT_CTRL2, __BIT(0), BLDO1_CTRL, __BITS(3,0)),
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AXP_CTRL("BLDO2", 700, 1900, 100,
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OUT_CTRL2, __BIT(1), BLDO2_CTRL, __BITS(3,0)),
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AXP_CTRL("BLDO3", 700, 1900, 100,
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OUT_CTRL2, __BIT(2), BLDO3_CTRL, __BITS(3,0)),
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AXP_CTRL("BLDO4", 700, 1900, 100,
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OUT_CTRL2, __BIT(3), BLDO4_CTRL, __BITS(3,0)),
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AXP_CTRL("CLDO1", 700, 3300, 100,
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OUT_CTRL2, __BIT(4), CLDO1_CTRL, __BITS(4,0)),
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AXP_CTRL2("CLDO2", 700, 4200, 100, 28, 200, 4,
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OUT_CTRL2, __BIT(5), CLDO2_CTRL, __BITS(4,0)),
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AXP_CTRL("CLDO3", 700, 3300, 100,
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OUT_CTRL2, __BIT(6), CLDO3_CTRL, __BITS(4,0)),
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};
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struct axp806_softc {
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device_t sc_dev;
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i2c_tag_t sc_i2c;
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i2c_addr_t sc_addr;
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u_int sc_nctrl;
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struct axp806_ctrl *sc_ctrl;
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};
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static int axp806_match(device_t, cfdata_t, void *);
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static void axp806_attach(device_t, device_t, void *);
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static int axp806_read(struct axp806_softc *, uint8_t, uint8_t *);
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static int axp806_write(struct axp806_softc *, uint8_t, uint8_t);
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static void axp806_print(struct axp806_ctrl *c);
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CFATTACH_DECL_NEW(axp806pm, sizeof(struct axp806_softc),
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axp806_match, axp806_attach, NULL, NULL);
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static int
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axp806_match(device_t parent, cfdata_t match, void *aux)
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{
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return 1;
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}
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static void
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axp806_attach(device_t parent, device_t self, void *aux)
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{
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struct axp806_softc *sc = device_private(self);
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struct i2c_attach_args *ia = aux;
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u_int n;
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sc->sc_dev = self;
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sc->sc_i2c = ia->ia_tag;
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sc->sc_addr = ia->ia_addr;
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aprint_naive("\n");
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aprint_normal("\n");
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sc->sc_nctrl = __arraycount(axp806_ctrls);
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sc->sc_ctrl = kmem_alloc(sizeof(axp806_ctrls), KM_SLEEP);
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memcpy(sc->sc_ctrl, axp806_ctrls, sizeof(axp806_ctrls));
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for (n = 0; n < sc->sc_nctrl; n++) {
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sc->sc_ctrl[n].c_dev = self;
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}
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#ifdef AXP_DEBUG
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for (n = 0; n < sc->sc_nctrl; n++) {
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axp806_print(&sc->sc_ctrl[n]);
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}
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#endif
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}
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static int
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axp806_read(struct axp806_softc *sc, uint8_t reg, uint8_t *val)
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{
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return iic_smbus_read_byte(sc->sc_i2c, sc->sc_addr, reg, val,
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cold ? I2C_F_POLL : 0);
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}
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static int
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axp806_write(struct axp806_softc *sc, uint8_t reg, uint8_t val)
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{
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return iic_smbus_write_byte(sc->sc_i2c, sc->sc_addr, reg, val,
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cold ? I2C_F_POLL : 0);
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}
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static void
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axp806_print(struct axp806_ctrl *c)
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{
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struct axp806_softc *sc = device_private(c->c_dev);
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u_int voltage;
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bool enabled;
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device_printf(sc->sc_dev, "%s:", c->c_name);
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if (c->c_voltage_reg) {
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if (axp806_get_voltage(c, &voltage)) {
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printf(" [??? V]");
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} else {
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printf(" [%d.%03dV]", voltage / 1000,
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voltage % 1000);
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}
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}
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if (c->c_enable_reg) {
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if (axp806_is_enabled(c, &enabled)) {
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printf(" [unknown state]");
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} else {
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printf(" [%s]", enabled ? "ON" : "OFF");
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}
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}
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printf("\n");
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}
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struct axp806_ctrl *
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axp806_lookup(device_t dev, const char *name)
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{
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struct axp806_softc *sc = device_private(dev);
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struct axp806_ctrl *c;
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u_int n;
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for (n = 0; n < sc->sc_nctrl; n++) {
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c = &sc->sc_ctrl[n];
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if (strcmp(c->c_name, name) == 0) {
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return c;
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}
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}
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return NULL;
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}
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int
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axp806_set_voltage(struct axp806_ctrl *c, u_int min, u_int max)
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{
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struct axp806_softc *sc = device_private(c->c_dev);
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u_int vol, reg_val;
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int nstep, error;
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uint8_t val;
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if (!c->c_voltage_mask)
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return EINVAL;
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if (min < c->c_min || min > c->c_max)
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return EINVAL;
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reg_val = 0;
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nstep = 1;
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vol = c->c_min;
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for (nstep = 0; nstep < c->c_step1cnt && vol < min; nstep++) {
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++reg_val;
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vol += c->c_step1;
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}
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for (nstep = 0; nstep < c->c_step2cnt && vol < min; nstep++) {
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++reg_val;
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vol += c->c_step2;
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}
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if (vol > max)
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return EINVAL;
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iic_acquire_bus(sc->sc_i2c, 0);
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if ((error = axp806_read(sc, c->c_voltage_reg, &val)) != 0)
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goto done;
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val &= ~c->c_voltage_mask;
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val |= __SHIFTIN(reg_val, c->c_voltage_mask);
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error = axp806_write(sc, c->c_voltage_reg, val);
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done:
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iic_release_bus(sc->sc_i2c, 0);
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#ifdef AXP_DEBUG
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if (error == 0)
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axp806_print(c);
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#endif
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return error;
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}
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int
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axp806_get_voltage(struct axp806_ctrl *c, u_int *pvol)
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{
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struct axp806_softc *sc = device_private(c->c_dev);
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int reg_val, error;
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uint8_t val;
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if (!c->c_voltage_mask)
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return EINVAL;
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iic_acquire_bus(sc->sc_i2c, 0);
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error = axp806_read(sc, c->c_voltage_reg, &val);
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iic_release_bus(sc->sc_i2c, 0);
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if (error)
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return error;
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reg_val = __SHIFTOUT(val, c->c_voltage_mask);
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if (reg_val < c->c_step1cnt) {
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*pvol = c->c_min + reg_val * c->c_step1;
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} else {
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*pvol = c->c_min + (c->c_step1cnt * c->c_step1) +
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((reg_val - c->c_step1cnt) * c->c_step2);
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}
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return 0;
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}
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int
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axp806_is_enabled(struct axp806_ctrl *c, bool *penabled)
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{
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struct axp806_softc *sc = device_private(c->c_dev);
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uint8_t val;
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int error;
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if (!c->c_enable_mask)
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return EINVAL;
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iic_acquire_bus(sc->sc_i2c, 0);
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error = axp806_read(sc, c->c_enable_reg, &val);
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iic_release_bus(sc->sc_i2c, 0);
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if (error)
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return error;
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*penabled = !!(val & c->c_enable_mask);
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return 0;
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}
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int
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axp806_enable(struct axp806_ctrl *c)
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{
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struct axp806_softc *sc = device_private(c->c_dev);
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uint8_t val;
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int error;
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if (!c->c_enable_mask)
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return EINVAL;
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iic_acquire_bus(sc->sc_i2c, 0);
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if ((error = axp806_read(sc, c->c_enable_reg, &val)) != 0)
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goto done;
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val |= c->c_enable_mask;
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error = axp806_write(sc, c->c_enable_reg, val);
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done:
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iic_release_bus(sc->sc_i2c, 0);
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#ifdef AXP_DEBUG
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if (error == 0)
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axp806_print(c);
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#endif
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return error;
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}
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int
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axp806_disable(struct axp806_ctrl *c)
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{
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struct axp806_softc *sc = device_private(c->c_dev);
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uint8_t val;
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int error;
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if (!c->c_enable_mask)
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return EINVAL;
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iic_acquire_bus(sc->sc_i2c, 0);
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if ((error = axp806_read(sc, c->c_enable_reg, &val)) != 0)
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goto done;
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val &= ~c->c_enable_mask;
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error = axp806_write(sc, c->c_enable_reg, val);
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done:
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iic_release_bus(sc->sc_i2c, 0);
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#ifdef AXP_DEBUG
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if (error == 0)
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axp806_print(c);
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#endif
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return error;
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}
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