757 lines
19 KiB
Diff
757 lines
19 KiB
Diff
From c4827e382726f31e069860af7a9af9bdef4b8bfb Mon Sep 17 00:00:00 2001
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From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
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Date: Tue, 24 May 2016 22:30:49 +0200
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Subject: [PATCH] power: MSHW0011 rev-eng implementation
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MSHW0011 replaces the battery firmware by using ACPI operation regions.
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The values have been obtained by reverse engineering, and are subject to
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errors. Looks like it works on overall pretty well.
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I couldn't manage to get the IRQ correctly triggered, so I am using a
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good old polling thread to check for changes.
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The acpica bits need their own patch with a little more love.
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Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
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---
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drivers/acpi/acpica/exfield.c | 11 +
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drivers/power/Kconfig | 8 +
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drivers/power/Makefile | 1 +
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drivers/power/surface3_power.c | 674 +++++++++++++++++++++++++++++++++++++++++
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4 files changed, 694 insertions(+)
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create mode 100644 drivers/power/surface3_power.c
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diff --git a/drivers/acpi/acpica/exfield.c b/drivers/acpi/acpica/exfield.c
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index d5d8020..f386675 100644
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--- a/drivers/acpi/acpica/exfield.c
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+++ b/drivers/acpi/acpica/exfield.c
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@@ -413,6 +413,17 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc,
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* Data[x-1]: (Bytes 2-x of the arbitrary length data buffer)
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*/
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length += 2;
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+
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+ /*
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+ * bug? in the MS Surface 3: length is 2 but the command
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+ * needs 3 parameters.
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+ * Functions like BIX requires a lot of in/out data,
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+ * so just take the incoming buffer length as the
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+ * reference.
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+ */
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+ if (accessor_type == 0xf)
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+ length = source_desc->buffer.length;
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+
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function = ACPI_WRITE | (accessor_type << 16);
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} else { /* IPMI */
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diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
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index 421770d..fb54d8b 100644
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--- a/drivers/power/Kconfig
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+++ b/drivers/power/Kconfig
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@@ -509,6 +509,14 @@ config AXP20X_POWER
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This driver provides support for the power supply features of
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AXP20x PMIC.
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+config SURFACE3_POWER
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+ tristate "Surface 3 power management driver"
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+ depends on I2C
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+ depends on GPIOLIB
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+ help
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+ This driver provides support for the power supply features of
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+ the Surface 3.
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+
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endif # POWER_SUPPLY
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source "drivers/power/reset/Kconfig"
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diff --git a/drivers/power/Makefile b/drivers/power/Makefile
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index e46b75d..a147a0e 100644
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--- a/drivers/power/Makefile
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+++ b/drivers/power/Makefile
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@@ -74,3 +74,4 @@ obj-$(CONFIG_CHARGER_TPS65217) += tps65217_charger.o
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obj-$(CONFIG_POWER_RESET) += reset/
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obj-$(CONFIG_AXP288_FUEL_GAUGE) += axp288_fuel_gauge.o
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obj-$(CONFIG_AXP288_CHARGER) += axp288_charger.o
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+obj-$(CONFIG_SURFACE3_POWER) += surface3_power.o
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diff --git a/drivers/power/surface3_power.c b/drivers/power/surface3_power.c
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new file mode 100644
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index 0000000..eee21d3
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--- /dev/null
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+++ b/drivers/power/surface3_power.c
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@@ -0,0 +1,674 @@
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+/*
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+ * Supports for the power IC on the Surface 3 tablet.
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+ *
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+ * (C) Copyright 2016 Red Hat, Inc
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * as published by the Free Software Foundation; version 2
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+ * of the License.
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+ */
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+
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+/*
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+ * This driver has been reverse-engineered by parsing the DSDT of the Surface 3
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+ * and looking at the registers of the chips.
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+ *
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+ * The DSDT allowed to find out that:
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+ * - the driver is required for the ACPI BAT0 device to communicate to the chip
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+ * through an operation region.
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+ * - the various defines for the operation region functions to communicate with
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+ * this driver
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+ * - the DSM 3f99e367-6220-4955-8b0f-06ef2ae79412 allows to trigger ACPI
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+ * events to BAT0 (the code is all available in the DSDT).
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+ *
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+ * Further findings regarding the 2 chips declared in the MSHW0011 are:
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+ * - there are 2 chips declared:
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+ * . 0x22 seems to control the ADP1 line status (and probably the charger)
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+ * . 0x55 controls the battery directly
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+ * - the battery chip uses a SMBus protocol (using plain SMBus allows non
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+ * destructive commands):
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+ * . the commands/registers used are in the range 0x00..0x7F
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+ * . if bit 8 (0x80) is set in the SMBus command, the returned value is the
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+ * same as when it is not set. There is a high chance this bit is the
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+ * read/write
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+ * . the various registers semantic as been deduced by observing the register
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+ * dumps.
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/i2c.h>
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+#include <linux/slab.h>
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+#include <linux/acpi.h>
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+#include <linux/kthread.h>
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+#include <linux/freezer.h>
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+
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+#include <asm/unaligned.h>
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+
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+#define POLL_INTERVAL (HZ * 2)
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+
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+static bool dump_registers;
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+module_param_named(dump_registers, dump_registers, bool, 0644);
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+MODULE_PARM_DESC(dump_registers,
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+ "Dump the SMBus register at probe (debugging only).");
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+
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+struct mshw0011_data {
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+ struct i2c_client *adp1;
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+ struct i2c_client *bat0;
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+ unsigned short notify_version;
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+ struct task_struct *poll_task;
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+ bool kthread_running;
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+
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+ bool charging;
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+ bool bat_charging;
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+ u8 trip_point;
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+};
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+
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+struct mshw0011_lookup {
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+ struct mshw0011_data *cdata;
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+ unsigned int n;
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+ unsigned int index;
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+ int addr;
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+};
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+
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+struct mshw0011_handler_data {
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+ struct acpi_connection_info info;
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+ struct i2c_client *client;
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+};
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+
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+struct bix {
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+ u32 revision;
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+ u32 power_unit;
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+ u32 design_capacity;
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+ u32 last_full_charg_capacity;
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+ u32 battery_technology;
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+ u32 design_voltage;
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+ u32 design_capacity_of_warning;
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+ u32 design_capacity_of_low;
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+ u32 cycle_count;
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+ u32 measurement_accuracy;
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+ u32 max_sampling_time;
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+ u32 min_sampling_time;
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+ u32 max_average_interval;
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+ u32 min_average_interval;
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+ u32 battery_capacity_granularity_1;
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+ u32 battery_capacity_granularity_2;
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+ char model[10];
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+ char serial[10];
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+ char type[10];
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+ char OEM[10];
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+} __packed;
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+
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+struct bst {
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+ u32 battery_state;
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+ s32 battery_present_rate;
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+ u32 battery_remaining_capacity;
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+ u32 battery_present_voltage;
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+} __packed;
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+
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+struct gsb_command {
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+ u8 arg0;
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+ u8 arg1;
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+ u8 arg2;
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+} __packed;
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+
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+struct gsb_buffer {
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+ u8 status;
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+ u8 len;
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+ u8 ret;
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+ union {
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+ struct gsb_command cmd;
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+ struct bst bst;
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+ struct bix bix;
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+ } __packed;
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+} __packed;
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+
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+#define MSHW0011_CMD_DEST_BAT0 0x01
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+#define MSHW0011_CMD_DEST_ADP1 0x03
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+
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+#define MSHW0011_CMD_BAT0_STA 0x01
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+#define MSHW0011_CMD_BAT0_BIX 0x02
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+#define MSHW0011_CMD_BAT0_BCT 0x03
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+#define MSHW0011_CMD_BAT0_BTM 0x04
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+#define MSHW0011_CMD_BAT0_BST 0x05
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+#define MSHW0011_CMD_BAT0_BTP 0x06
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+#define MSHW0011_CMD_ADP1_PSR 0x07
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+#define MSHW0011_CMD_BAT0_PSOC 0x09
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+#define MSHW0011_CMD_BAT0_PMAX 0x0A
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+#define MSHW0011_CMD_BAT0_PSRC 0x0B
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+#define MSHW0011_CMD_BAT0_CHGI 0x0C
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+#define MSHW0011_CMD_BAT0_ARTG 0x0D
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+
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+#define MSHW0011_NOTIFY_GET_VERSION 0x00
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+#define MSHW0011_NOTIFY_ADP1 0x01
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+#define MSHW0011_NOTIFY_BAT0 0x02
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+
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+#define MSHW0011_ADP1_REG_PSR 0x03
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+
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+#define MSHW0011_BAT0_REG_CAPACITY 0x0c
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+#define MSHW0011_BAT0_REG_VOLTAGE 0x08
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+#define MSHW0011_BAT0_REG_RATE 0x14
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+#define MSHW0011_BAT0_REG_OEM 0x45
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+#define MSHW0011_BAT0_REG_TYPE 0x4e
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+#define MSHW0011_BAT0_REG_SERIAL_NO 0x56
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+#define MSHW0011_BAT0_REG_CYCLE_CNT 0x6e
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+
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+#define MSHW0011_EV_2_5 0x1ff
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+
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+static int mshw0011_i2c_read_block(struct i2c_client *client, u8 reg, u8 *buf,
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+ int len)
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+{
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+ int status, i;
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+
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+ for (i = 0; i < len; i++) {
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+ status = i2c_smbus_read_byte_data(client, reg + i);
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+ if (status < 0) {
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+ buf[i] = 0xff;
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+ continue;
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+ }
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+
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+ buf[i] = (u8)status;
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+ }
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+
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+ return 0;
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+}
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+
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+static int
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+mshw0011_notify(struct mshw0011_data *cdata, u8 arg1, u8 arg2,
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+ unsigned int *ret_value)
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+{
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+ static const u8 mshw0011_guid[] = {
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+ 0x67, 0xE3, 0x99, 0x3F, 0x20, 0x62, 0x55, 0x49,
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+ 0x8b, 0x0f, 0x06, 0xef, 0x2a, 0xe7, 0x94, 0x12,
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+ };
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+ union acpi_object *obj;
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+ struct acpi_device *adev;
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+ acpi_handle handle;
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+ unsigned int i;
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+
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+ handle = ACPI_HANDLE(&cdata->adp1->dev);
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+ if (!handle || acpi_bus_get_device(handle, &adev))
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+ return -ENODEV;
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+
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+ obj = acpi_evaluate_dsm_typed(handle, mshw0011_guid, arg1, arg2, NULL,
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+ ACPI_TYPE_BUFFER);
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+ if (!obj) {
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+ dev_err(&cdata->adp1->dev, "device _DSM execution failed\n");
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+ return -ENODEV;
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+ }
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+
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+ *ret_value = 0;
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+ for (i = 0; i < obj->buffer.length; i++)
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+ *ret_value |= obj->buffer.pointer[i] << (i * 8);
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+
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+ ACPI_FREE(obj);
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+ return 0;
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+}
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+
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+static const struct bix default_bix = {
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+ .revision = 0x00,
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+ .power_unit = 0x01,
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+ .design_capacity = 0x1dca,
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+ .last_full_charg_capacity = 0x1dca,
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+ .battery_technology = 0x01,
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+ .design_voltage = 0x10df,
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+ .design_capacity_of_warning = 0x8f,
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+ .design_capacity_of_low = 0x47,
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+ .cycle_count = 0xffffffff,
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+ .measurement_accuracy = 0x00015F90,
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+ .max_sampling_time = 0x03E8,
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+ .min_sampling_time = 0x03E8,
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+ .max_average_interval = 0x03E8,
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+ .min_average_interval = 0x03E8,
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+ .battery_capacity_granularity_1 = 0x45,
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+ .battery_capacity_granularity_2 = 0x11,
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+ .model = "P11G8M",
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+ .serial = "",
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+ .type = "LION",
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+ .OEM = "",
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+};
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+
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+static int mshw0011_bix(struct mshw0011_data *cdata, struct bix *bix)
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+{
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+ struct i2c_client *client = cdata->bat0;
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+ int ret;
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+ char buf[10];
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+
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+ *bix = default_bix;
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+
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+ /* get serial number */
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+ ret = mshw0011_i2c_read_block(client, MSHW0011_BAT0_REG_SERIAL_NO,
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+ buf, 10);
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+ if (ret) {
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+ dev_err(&client->dev, "Error reading serial no: %d\n", ret);
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+ return ret;
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+ }
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+ memcpy(bix->serial, buf + 7, 3);
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+ memcpy(bix->serial + 3, buf, 6);
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+ bix->serial[9] = '\0';
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+
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+ /* get cycle count */
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+ ret = i2c_smbus_read_word_data(client, MSHW0011_BAT0_REG_CYCLE_CNT);
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+ if (ret < 0) {
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+ dev_err(&client->dev, "Error reading cycle count: %d\n", ret);
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+ return ret;
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+ }
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+ bix->cycle_count = le16_to_cpu(ret);
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+
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+ /* get OEM name */
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+ ret = mshw0011_i2c_read_block(client, MSHW0011_BAT0_REG_OEM, buf, 4);
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+ if (ret) {
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+ dev_err(&client->dev, "Error reading cycle count: %d\n", ret);
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+ return ret;
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+ }
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+ memcpy(bix->OEM, buf, 3);
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+ bix->OEM[4] = '\0';
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+
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+ return 0;
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+}
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+
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+static int mshw0011_bst(struct mshw0011_data *cdata, struct bst *bst)
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+{
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+ struct i2c_client *client = cdata->bat0;
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+ int rate, capacity, voltage;
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+ s16 tmp;
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+
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+ rate = i2c_smbus_read_word_data(client, MSHW0011_BAT0_REG_RATE);
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+ if (rate < 0)
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+ return rate;
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+
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+ capacity = i2c_smbus_read_word_data(client, MSHW0011_BAT0_REG_CAPACITY);
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+ if (capacity < 0)
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+ return capacity;
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+
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+ voltage = i2c_smbus_read_word_data(client, MSHW0011_BAT0_REG_VOLTAGE);
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+ if (voltage < 0)
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+ return voltage;
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+
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+ tmp = le16_to_cpu(rate);
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+ bst->battery_present_rate = (s32)tmp;
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+ bst->battery_state = bst->battery_present_rate < 0 ? 0x01 : 0x02;
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+ bst->battery_remaining_capacity = le16_to_cpu(capacity);
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+ bst->battery_present_voltage = le16_to_cpu(voltage);
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+
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+ return 0;
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+}
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+
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+static int mshw0011_adp_psr(struct mshw0011_data *cdata)
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+{
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+ struct i2c_client *client = cdata->adp1;
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+ int ret;
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+
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+ ret = i2c_smbus_read_byte_data(client, MSHW0011_ADP1_REG_PSR);
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+ if (ret < 0)
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+ return ret;
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+
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+ return ret;
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+}
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+
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+static int mshw0011_isr(struct mshw0011_data *cdata)
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+{
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+ struct bst bst;
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+ int ret;
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+ bool status, bat_status;
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+
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+ ret = mshw0011_adp_psr(cdata);
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+ if (ret < 0)
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+ return ret;
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+
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+ status = ret;
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+
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+ if (status != cdata->charging)
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+ mshw0011_notify(cdata, cdata->notify_version,
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+ MSHW0011_NOTIFY_ADP1, &ret);
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+
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+ cdata->charging = status;
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+
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+ ret = mshw0011_bst(cdata, &bst);
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+ if (ret < 0)
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+ return ret;
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+
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+ bat_status = bst.battery_present_rate >= 0;
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+
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+ if (bat_status != cdata->bat_charging)
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+ mshw0011_notify(cdata, cdata->notify_version,
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+ MSHW0011_NOTIFY_BAT0, &ret);
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+
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+ cdata->bat_charging = bat_status;
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+
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+ return 0;
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+}
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+
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+static int mshw0011_poll_task(void *data)
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+{
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+ struct mshw0011_data *cdata = data;
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+ int ret = 0;
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+
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+ cdata->kthread_running = true;
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+
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+ set_freezable();
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+
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+ while (!kthread_should_stop()) {
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+ schedule_timeout_interruptible(POLL_INTERVAL);
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+ try_to_freeze();
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+ ret = mshw0011_isr(data);
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+ if (ret)
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+ goto out;
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+ }
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+
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+out:
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+ cdata->kthread_running = false;
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+ return ret;
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+}
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+
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+static acpi_status
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+mshw0011_space_handler(u32 function, acpi_physical_address command,
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+ u32 bits, u64 *value64,
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+ void *handler_context, void *region_context)
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+{
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+ struct gsb_buffer *gsb = (struct gsb_buffer *)value64;
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+ struct mshw0011_handler_data *data = handler_context;
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+ struct acpi_connection_info *info = &data->info;
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+ struct acpi_resource_i2c_serialbus *sb;
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+ struct i2c_client *client = data->client;
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+ struct mshw0011_data *cdata = i2c_get_clientdata(client);
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+ struct acpi_resource *ares;
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+ u32 accessor_type = function >> 16;
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+ acpi_status ret;
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+ int status = 1;
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|
+
|
|
+ ret = acpi_buffer_to_resource(info->connection, info->length, &ares);
|
|
+ if (ACPI_FAILURE(ret))
|
|
+ return ret;
|
|
+
|
|
+ if (!value64 || ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) {
|
|
+ ret = AE_BAD_PARAMETER;
|
|
+ goto err;
|
|
+ }
|
|
+
|
|
+ sb = &ares->data.i2c_serial_bus;
|
|
+ if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_I2C) {
|
|
+ ret = AE_BAD_PARAMETER;
|
|
+ goto err;
|
|
+ }
|
|
+
|
|
+ if (accessor_type != ACPI_GSB_ACCESS_ATTRIB_RAW_PROCESS) {
|
|
+ ret = AE_BAD_PARAMETER;
|
|
+ goto err;
|
|
+ }
|
|
+
|
|
+ if (gsb->cmd.arg0 == MSHW0011_CMD_DEST_ADP1 &&
|
|
+ gsb->cmd.arg1 == MSHW0011_CMD_ADP1_PSR) {
|
|
+ ret = mshw0011_adp_psr(cdata);
|
|
+ if (ret >= 0) {
|
|
+ status = ret;
|
|
+ ret = 0;
|
|
+ }
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ if (gsb->cmd.arg0 != MSHW0011_CMD_DEST_BAT0) {
|
|
+ ret = AE_BAD_PARAMETER;
|
|
+ goto err;
|
|
+ }
|
|
+
|
|
+ switch (gsb->cmd.arg1) {
|
|
+ case MSHW0011_CMD_BAT0_STA:
|
|
+ status = 1;
|
|
+ ret = 0;
|
|
+ break;
|
|
+ case MSHW0011_CMD_BAT0_BIX:
|
|
+ status = 1;
|
|
+ ret = mshw0011_bix(cdata, &gsb->bix);
|
|
+ break;
|
|
+ case MSHW0011_CMD_BAT0_BTP:
|
|
+ status = 1;
|
|
+ ret = 0;
|
|
+ cdata->trip_point = gsb->cmd.arg2;
|
|
+ break;
|
|
+ case MSHW0011_CMD_BAT0_BST:
|
|
+ status = 1;
|
|
+ ret = mshw0011_bst(cdata, &gsb->bst);
|
|
+ break;
|
|
+ default:
|
|
+ pr_info("command(0x%02x) is not supported.\n", gsb->cmd.arg1);
|
|
+ ret = AE_BAD_PARAMETER;
|
|
+ goto err;
|
|
+ }
|
|
+
|
|
+ out:
|
|
+ gsb->ret = status;
|
|
+ gsb->status = 0;
|
|
+
|
|
+ err:
|
|
+ ACPI_FREE(ares);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int mshw0011_install_space_handler(struct i2c_client *client)
|
|
+{
|
|
+ acpi_handle handle;
|
|
+ struct mshw0011_handler_data *data;
|
|
+ acpi_status status;
|
|
+
|
|
+ handle = ACPI_HANDLE(&client->dev);
|
|
+
|
|
+ if (!handle)
|
|
+ return -ENODEV;
|
|
+
|
|
+ data = kzalloc(sizeof(struct mshw0011_handler_data),
|
|
+ GFP_KERNEL);
|
|
+ if (!data)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ data->client = client;
|
|
+ status = acpi_bus_attach_private_data(handle, (void *)data);
|
|
+ if (ACPI_FAILURE(status)) {
|
|
+ kfree(data);
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ status = acpi_install_address_space_handler(handle,
|
|
+ ACPI_ADR_SPACE_GSBUS,
|
|
+ &mshw0011_space_handler,
|
|
+ NULL,
|
|
+ data);
|
|
+ if (ACPI_FAILURE(status)) {
|
|
+ dev_err(&client->dev, "Error installing i2c space handler\n");
|
|
+ acpi_bus_detach_private_data(handle);
|
|
+ kfree(data);
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ acpi_walk_dep_device_list(handle);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void mshw0011_remove_space_handler(struct i2c_client *client)
|
|
+{
|
|
+ acpi_handle handle;
|
|
+ struct mshw0011_handler_data *data;
|
|
+ acpi_status status;
|
|
+
|
|
+ handle = ACPI_HANDLE(&client->dev);
|
|
+
|
|
+ if (!handle)
|
|
+ return;
|
|
+
|
|
+ acpi_remove_address_space_handler(handle,
|
|
+ ACPI_ADR_SPACE_GSBUS,
|
|
+ &mshw0011_space_handler);
|
|
+
|
|
+ status = acpi_bus_get_private_data(handle, (void **)&data);
|
|
+ if (ACPI_SUCCESS(status))
|
|
+ kfree(data);
|
|
+
|
|
+ acpi_bus_detach_private_data(handle);
|
|
+}
|
|
+
|
|
+static int acpi_find_i2c(struct acpi_resource *ares, void *data)
|
|
+{
|
|
+ struct mshw0011_lookup *lookup = data;
|
|
+
|
|
+ if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
|
|
+ return 1;
|
|
+
|
|
+ if (lookup->n++ == lookup->index && !lookup->addr)
|
|
+ lookup->addr = ares->data.i2c_serial_bus.slave_address;
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+static int mshw0011_i2c_resource_lookup(struct mshw0011_data *cdata,
|
|
+ unsigned int index)
|
|
+{
|
|
+ struct i2c_client *client = cdata->adp1;
|
|
+ struct acpi_device *adev = ACPI_COMPANION(&client->dev);
|
|
+ struct mshw0011_lookup lookup = {
|
|
+ .cdata = cdata,
|
|
+ .index = index,
|
|
+ };
|
|
+ struct list_head res_list;
|
|
+ int ret;
|
|
+
|
|
+ INIT_LIST_HEAD(&res_list);
|
|
+
|
|
+ ret = acpi_dev_get_resources(adev, &res_list, acpi_find_i2c, &lookup);
|
|
+ if (ret < 0)
|
|
+ return ret;
|
|
+
|
|
+ acpi_dev_free_resource_list(&res_list);
|
|
+
|
|
+ if (!lookup.addr)
|
|
+ return -ENOENT;
|
|
+
|
|
+ return lookup.addr;
|
|
+}
|
|
+
|
|
+static void mshw0011_dump_registers(struct i2c_client *client,
|
|
+ struct i2c_client *bat0)
|
|
+{
|
|
+ char rd_buf[60];
|
|
+ int error, i, c;
|
|
+ char buff[17 * 3 * 2] = {0};
|
|
+
|
|
+ dev_info(&client->dev, "dumping registers 0x00 to 0x7F:\n");
|
|
+
|
|
+ for (i = 0; i < 0x80; i += 0x20) {
|
|
+ memset(rd_buf, 0, sizeof(rd_buf));
|
|
+ error = mshw0011_i2c_read_block(bat0, i, rd_buf, 0x20);
|
|
+ dev_info(&client->dev, " read 0x%02x: %*ph|%*ph\n",
|
|
+ i,
|
|
+ 0x10, rd_buf,
|
|
+ 0x10, rd_buf + 0x10);
|
|
+ for (c = 0; c < 0x20; c++) {
|
|
+ if (rd_buf[c] >= 0x20 && rd_buf[c] <= 0x7e) {
|
|
+ buff[c * 3 + 0] = ' ';
|
|
+ buff[c * 3 + 1] = rd_buf[c];
|
|
+ } else {
|
|
+ buff[c * 3 + 0] = '-';
|
|
+ buff[c * 3 + 1] = '-';
|
|
+ }
|
|
+ buff[c * 3 + 2] = (c + 1) % 0x10 ? ' ' : '|';
|
|
+ }
|
|
+ buff[0x1f * 3 + 2] = '\0';
|
|
+ dev_info(&client->dev, "ascii 0x%02x: %s\n", i, buff);
|
|
+ }
|
|
+}
|
|
+
|
|
+static int mshw0011_probe(struct i2c_client *client,
|
|
+ const struct i2c_device_id *id)
|
|
+{
|
|
+ struct device *dev = &client->dev;
|
|
+ struct i2c_client *bat0;
|
|
+ struct mshw0011_data *data;
|
|
+ int error, version, addr;
|
|
+
|
|
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
|
|
+ if (!data)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ data->adp1 = client;
|
|
+ i2c_set_clientdata(client, data);
|
|
+
|
|
+ addr = mshw0011_i2c_resource_lookup(data, 1);
|
|
+ if (addr < 0)
|
|
+ return addr;
|
|
+
|
|
+ bat0 = i2c_new_dummy(client->adapter, addr);
|
|
+ if (!bat0)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ data->bat0 = bat0;
|
|
+ i2c_set_clientdata(bat0, data);
|
|
+
|
|
+ if (dump_registers)
|
|
+ mshw0011_dump_registers(client, bat0);
|
|
+
|
|
+ error = mshw0011_notify(data, 1, MSHW0011_NOTIFY_GET_VERSION, &version);
|
|
+ if (error)
|
|
+ goto out_err;
|
|
+
|
|
+ data->notify_version = version == MSHW0011_EV_2_5;
|
|
+
|
|
+ data->poll_task = kthread_run(mshw0011_poll_task, data, "mshw0011_adp");
|
|
+ if (IS_ERR(data->poll_task)) {
|
|
+ error = PTR_ERR(data->poll_task);
|
|
+ dev_err(&client->dev, "Unable to run kthread err %d\n", error);
|
|
+ goto out_err;
|
|
+ }
|
|
+
|
|
+ error = mshw0011_install_space_handler(client);
|
|
+ if (error)
|
|
+ goto out_err;
|
|
+
|
|
+ return 0;
|
|
+
|
|
+out_err:
|
|
+ if (data->kthread_running)
|
|
+ kthread_stop(data->poll_task);
|
|
+ i2c_unregister_device(data->bat0);
|
|
+ return error;
|
|
+}
|
|
+
|
|
+static int mshw0011_remove(struct i2c_client *client)
|
|
+{
|
|
+ struct mshw0011_data *cdata = i2c_get_clientdata(client);
|
|
+
|
|
+ mshw0011_remove_space_handler(client);
|
|
+
|
|
+ if (cdata->kthread_running)
|
|
+ kthread_stop(cdata->poll_task);
|
|
+
|
|
+ i2c_unregister_device(cdata->bat0);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static const struct i2c_device_id mshw0011_id[] = {
|
|
+ { "MSHW0011:00", 0 },
|
|
+ { }
|
|
+};
|
|
+MODULE_DEVICE_TABLE(i2c, mshw0011_id);
|
|
+
|
|
+#ifdef CONFIG_ACPI
|
|
+static const struct acpi_device_id mshw0011_acpi_match[] = {
|
|
+ { "MSHW0011", 0 },
|
|
+ { }
|
|
+};
|
|
+MODULE_DEVICE_TABLE(acpi, mshw0011_acpi_match);
|
|
+#endif
|
|
+
|
|
+static struct i2c_driver mshw0011_driver = {
|
|
+ .probe = mshw0011_probe,
|
|
+ .remove = mshw0011_remove,
|
|
+ .id_table = mshw0011_id,
|
|
+ .driver = {
|
|
+ .name = "mshw0011",
|
|
+ .acpi_match_table = ACPI_PTR(mshw0011_acpi_match),
|
|
+ },
|
|
+};
|
|
+module_i2c_driver(mshw0011_driver);
|
|
+
|
|
+MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
|
|
+MODULE_DESCRIPTION("mshw0011 driver");
|
|
+MODULE_LICENSE("GPL v2");
|
|
--
|
|
2.5.0
|
|
|