+++ /dev/null
---- a/drivers/cbus/Kconfig
-+++ b/drivers/cbus/Kconfig
-@@ -83,4 +83,12 @@ config CBUS_RETU_HEADSET
-
- endif # CBUS_RETU
-
-+config N810BM
-+ depends on CBUS_RETU && CBUS_TAHVO
-+ tristate "Nokia n810 battery management"
-+ ---help---
-+ Nokia n810 device battery management.
-+
-+ If unsure, say N.
-+
- endmenu
---- a/drivers/cbus/Makefile
-+++ b/drivers/cbus/Makefile
-@@ -11,3 +11,6 @@ obj-$(CONFIG_CBUS_RETU_POWERBUTTON) += r
- obj-$(CONFIG_CBUS_RETU_RTC) += retu-rtc.o
- obj-$(CONFIG_CBUS_RETU_WDT) += retu-wdt.o
- obj-$(CONFIG_CBUS_RETU_HEADSET) += retu-headset.o
-+n810bm-y += n810bm_main.o
-+n810bm-y += lipocharge.o
-+obj-$(CONFIG_N810BM) += n810bm.o
---- /dev/null
-+++ b/drivers/cbus/n810bm_main.c
-@@ -0,0 +1,1572 @@
-+/*
-+ * Nokia n810 battery management
-+ *
-+ * WARNING: This driver is based on unconfirmed documentation.
-+ * It is possibly dangerous to use this software.
-+ * Use this software at your own risk!
-+ *
-+ * Copyright (c) 2010-2011 Michael Buesch <mb@bu3sch.de>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2
-+ * of the License, or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#define DEBUG
-+
-+#include <linux/module.h>
-+#include <linux/device.h>
-+#include <linux/platform_device.h>
-+#include <linux/slab.h>
-+#include <linux/mutex.h>
-+#include <linux/timer.h>
-+#include <linux/firmware.h>
-+#include <linux/bitops.h>
-+#include <linux/workqueue.h>
-+#include <linux/delay.h>
-+#include <linux/interrupt.h>
-+
-+#include "cbus.h"
-+#include "retu.h"
-+#include "tahvo.h"
-+#include "lipocharge.h"
-+
-+
-+#define N810BM_PMM_BLOCK_FILENAME "n810-cal-bme-pmm.fw"
-+#define N810BM_PMM_BLOCK_SIZE 0x600
-+#define N810BM_PMM_GROUP_SIZE 0x200
-+#define N810BM_PMM_ELEM_SIZE 0x10
-+
-+#define N810BM_CHECK_INTERVAL (HZ * 2)
-+#define N810BM_MIN_VOLTAGE_THRES 3200 /* Absolute minimum voltage threshold */
-+
-+
-+/* RETU_ADC_BSI
-+ * The battery size indicator ADC measures the resistance between
-+ * the battery BSI pin and ground. This is used to detect the battery
-+ * capacity, as the BSI resistor is related to capacity.
-+ *
-+ * Manually measured lookup table.
-+ * Hard to measure, thus not very accurate.
-+ *
-+ * Resistance | ADC value
-+ * ========================
-+ * 120k | 0x3AC
-+ * 110k | 0x37C
-+ * 100k | 0x351
-+ * 90k | 0x329
-+ */
-+
-+/* RETU_ADC_BATTVOLT
-+ * Manually measured lookup table.
-+ * Hard to measure, thus not very accurate.
-+ *
-+ * Voltage | ADC value
-+ * =====================
-+ * 2.80V | 0x037
-+ * 2.90V | 0x05E
-+ * 3.00V | 0x090
-+ * 3.10V | 0x0A4
-+ * 3.20V | 0x0CC
-+ * 3.30V | 0x0EF
-+ * 3.40V | 0x115
-+ * 3.50V | 0x136
-+ * 3.60V | 0x15C
-+ * 3.70V | 0x187
-+ * 3.80V | 0x1A5
-+ * 3.90V | 0x1C9
-+ * 4.00V | 0x1ED
-+ * 4.10V | 0x212
-+ * 4.20V | 0x236
-+ */
-+
-+
-+/* PMM block ADC IDs */
-+enum n810bm_pmm_adc_id {
-+ N810BM_PMM_ADC_BATVOLT = 0x01, /* Battery voltage */
-+ N810BM_PMM_ADC_CHGVOLT = 0x02, /* Charger voltage */
-+ N810BM_PMM_ADC_GND2 = 0x03, /* Ground 0V */
-+ N810BM_PMM_ADC_BSI = 0x04, /* Battery size indicator */
-+ N810BM_PMM_ADC_BATTEMP = 0x05, /* Battery temperature */
-+ N810BM_PMM_ADC_HEADSET = 0x06, /* Headset detection */
-+ N810BM_PMM_ADC_HOOKDET = 0x07, /* Hook detection */
-+ N810BM_PMM_ADC_LIGHTSENS = 0x08, /* Light sensor */
-+ N810BM_PMM_ADC_BATCURR = 0x0E, /* Battery current */
-+ N810BM_PMM_ADC_BKUPVOLT = 0x13, /* Backup battery voltage */
-+ N810BM_PMM_ADC_LIGHTTEMP = 0x14, /* Light sensor temperature */
-+ N810BM_PMM_ADC_RFGP = 0x15, /* RF GP */
-+ N810BM_PMM_ADC_WBTX = 0x16, /* Wideband TX detection */
-+ N810BM_PMM_ADC_RETUTEMP = 0x17, /* RETU chip temperature */
-+ N810BM_PMM_ADC_0xFE = 0xFE,
-+};
-+
-+struct n810bm_adc_calib {
-+ enum n810bm_pmm_adc_id id;
-+ u8 flags;
-+ u8 adc_groupnr;
-+ u32 field1;
-+ u32 field2;
-+ u16 field3;
-+ u16 field4;
-+};
-+
-+struct n810bm_calib {
-+ struct n810bm_adc_calib adc[25];
-+};
-+
-+enum n810bm_capacity {
-+ N810BM_CAP_UNKNOWN = -1,
-+ N810BM_CAP_NONE = 0,
-+ N810BM_CAP_1500MAH = 1500, /* 1500 mAh battery */
-+};
-+
-+enum n810bm_notify_flags {
-+ N810BM_NOTIFY_charger_present,
-+ N810BM_NOTIFY_charger_state,
-+ N810BM_NOTIFY_charger_pwm,
-+};
-+
-+struct n810bm {
-+ int tahvo_irq;
-+ bool tahvo_irq_enabled;
-+
-+ bool battery_present; /* A battery is inserted */
-+ bool charger_present; /* The charger is connected */
-+ enum n810bm_capacity capacity; /* The capacity of the inserted battery (if any) */
-+
-+ bool charger_enabled; /* Want to charge? */
-+ struct lipocharge charger; /* Charger subsystem */
-+ unsigned int active_current_pwm; /* Active value of TAHVO_REG_CHGCURR */
-+ int current_measure_enabled; /* Current measure enable refcount */
-+
-+ struct platform_device *pdev;
-+ struct n810bm_calib calib; /* Calibration data */
-+
-+ bool verbose_charge_log; /* Verbose charge logging */
-+
-+ unsigned long notify_flags;
-+ struct work_struct notify_work;
-+ struct delayed_work periodic_check_work;
-+
-+ bool initialized; /* The hardware was initialized */
-+ struct mutex mutex;
-+};
-+
-+static void n810bm_notify_charger_present(struct n810bm *bm);
-+static void n810bm_notify_charger_state(struct n810bm *bm);
-+static void n810bm_notify_charger_pwm(struct n810bm *bm);
-+
-+
-+static struct platform_device *n810bm_retu_device;
-+static struct platform_device *n810bm_tahvo_device;
-+
-+
-+static inline struct n810bm * device_to_n810bm(struct device *dev)
-+{
-+ struct platform_device *pdev = to_platform_device(dev);
-+ struct n810bm *bm = platform_get_drvdata(pdev);
-+
-+ return bm;
-+}
-+
-+static inline bool n810bm_known_battery_present(struct n810bm *bm)
-+{
-+ return bm->battery_present &&
-+ bm->capacity != N810BM_CAP_UNKNOWN &&
-+ bm->capacity != N810BM_CAP_NONE;
-+}
-+
-+static void n810bm_emergency(struct n810bm *bm, const char *message) __noreturn;
-+static void n810bm_emergency(struct n810bm *bm, const char *message)
-+{
-+ printk(KERN_EMERG "n810 battery management fatal fault: %s\n", message);
-+ cbus_emergency();
-+}
-+
-+static u16 tahvo_read(struct n810bm *bm, unsigned int reg)
-+{
-+ return tahvo_read_reg(&n810bm_tahvo_device->dev, reg);
-+}
-+
-+static void tahvo_maskset(struct n810bm *bm, unsigned int reg, u16 mask, u16 set)
-+{
-+ tahvo_set_clear_reg_bits(&n810bm_tahvo_device->dev, reg, set, mask);
-+}
-+
-+static inline void tahvo_write(struct n810bm *bm, unsigned int reg, u16 value)
-+{
-+ tahvo_write_reg(&n810bm_tahvo_device->dev, reg, value);
-+}
-+
-+static inline void tahvo_set(struct n810bm *bm, unsigned int reg, u16 mask)
-+{
-+ tahvo_set_clear_reg_bits(&n810bm_tahvo_device->dev, reg, mask, mask);
-+}
-+
-+static inline void tahvo_clear(struct n810bm *bm, unsigned int reg, u16 mask)
-+{
-+ tahvo_set_clear_reg_bits(&n810bm_tahvo_device->dev, reg, 0, mask);
-+}
-+
-+static u16 retu_read(struct n810bm *bm, unsigned int reg)
-+{
-+ return retu_read_reg(&n810bm_retu_device->dev, reg);
-+}
-+
-+static void retu_maskset(struct n810bm *bm, unsigned int reg, u16 mask, u16 set)
-+{
-+ retu_set_clear_reg_bits(&n810bm_retu_device->dev, reg, set, mask);
-+}
-+
-+static inline void retu_write(struct n810bm *bm, unsigned int reg, u16 value)
-+{
-+ retu_write_reg(&n810bm_retu_device->dev, reg, value);
-+}
-+
-+static int retu_adc_average(struct n810bm *bm, unsigned int chan,
-+ unsigned int nr_passes)
-+{
-+ unsigned int i, value = 0;
-+ int ret;
-+
-+ if (WARN_ON(!nr_passes))
-+ return 0;
-+ for (i = 0; i < nr_passes; i++) {
-+ ret = retu_read_adc(&n810bm_retu_device->dev, chan);
-+ if (ret < 0)
-+ return ret;
-+ value += ret;
-+ }
-+ value /= nr_passes;
-+
-+ return value;
-+}
-+
-+static struct n810bm_adc_calib * n810bm_get_adc_calib(struct n810bm *bm,
-+ enum n810bm_pmm_adc_id id)
-+{
-+ unsigned int index = 0;
-+ struct n810bm_adc_calib *cal;
-+
-+ if (id != N810BM_PMM_ADC_0xFE)
-+ index = (unsigned int)id + 1;
-+ if (index >= ARRAY_SIZE(bm->calib.adc))
-+ return NULL;
-+
-+ cal = &bm->calib.adc[index];
-+ WARN_ON(cal->id && cal->id != id);
-+
-+ return cal;
-+}
-+
-+static int pmm_record_get(struct n810bm *bm,
-+ const struct firmware *pmm_block,
-+ void *buffer, size_t length,
-+ unsigned int group, unsigned int element, unsigned int offset)
-+{
-+ const u8 *pmm_area = pmm_block->data;
-+ u8 active_group_mask;
-+
-+ if (pmm_block->size != N810BM_PMM_BLOCK_SIZE)
-+ return -EINVAL;
-+ if (group >= N810BM_PMM_BLOCK_SIZE / N810BM_PMM_GROUP_SIZE)
-+ return -EINVAL;
-+ if (element >= N810BM_PMM_GROUP_SIZE / N810BM_PMM_ELEM_SIZE)
-+ return -EINVAL;
-+ if (offset >= N810BM_PMM_ELEM_SIZE || length > N810BM_PMM_ELEM_SIZE ||
-+ length + offset > N810BM_PMM_ELEM_SIZE)
-+ return -EINVAL;
-+
-+ active_group_mask = pmm_area[16];
-+ if (!(active_group_mask & (1 << group))) {
-+ dev_dbg(&bm->pdev->dev, "pwm_record_get: Requested group %u, "
-+ "but group is not active", group);
-+ return -ENOENT;
-+ }
-+
-+ memcpy(buffer,
-+ pmm_area + group * N810BM_PMM_GROUP_SIZE
-+ + element * N810BM_PMM_ELEM_SIZE
-+ + offset,
-+ length);
-+
-+ return 0;
-+}
-+
-+/* PMM block group 1 element */
-+struct group1_element {
-+ u8 id;
-+ u8 flags;
-+ u8 adc_groupnr;
-+ u8 _padding;
-+ __le32 field1;
-+ __le32 field2;
-+} __packed;
-+
-+static int extract_group1_elem(struct n810bm *bm,
-+ const struct firmware *pmm_block,
-+ const enum n810bm_pmm_adc_id *pmm_adc_ids, size_t nr_pmm_adc_ids,
-+ u32 field1_mask, u32 field2_mask)
-+{
-+ struct group1_element elem;
-+ int err;
-+ unsigned int i, element_nr;
-+ struct n810bm_adc_calib *adc_calib;
-+
-+ for (i = 0; i < nr_pmm_adc_ids; i++) {
-+ element_nr = (unsigned int)(pmm_adc_ids[i]) + 3;
-+
-+ err = pmm_record_get(bm, pmm_block, &elem, sizeof(elem),
-+ 1, element_nr, 0);
-+ if (err)
-+ continue;
-+ adc_calib = n810bm_get_adc_calib(bm, elem.id);
-+ if (!adc_calib) {
-+ dev_err(&bm->pdev->dev, "extract_group1_elem: "
-+ "Could not get calib element for 0x%02X",
-+ elem.id);
-+ return -EINVAL;
-+ }
-+
-+ if (adc_calib->flags == elem.flags) {
-+ adc_calib->field1 = le32_to_cpu(elem.field1) & field1_mask;
-+ adc_calib->field2 = le32_to_cpu(elem.field2) & field2_mask;
-+ } else {
-+ dev_dbg(&bm->pdev->dev, "extract_group1_elem: "
-+ "Not extracting fields due to flags mismatch: "
-+ "0x%02X vs 0x%02X",
-+ adc_calib->flags, elem.flags);
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+static int n810bm_parse_pmm_group1(struct n810bm *bm,
-+ const struct firmware *pmm_block)
-+{
-+ struct n810bm_adc_calib *adc_calib;
-+ struct group1_element elem;
-+ int err;
-+
-+ static const enum n810bm_pmm_adc_id pmm_adc_ids_1[] = {
-+ N810BM_PMM_ADC_BATVOLT,
-+ N810BM_PMM_ADC_CHGVOLT,
-+ N810BM_PMM_ADC_BKUPVOLT,
-+ N810BM_PMM_ADC_BATCURR,
-+ };
-+ static const enum n810bm_pmm_adc_id pmm_adc_ids_2[] = {
-+ N810BM_PMM_ADC_BSI,
-+ };
-+ static const enum n810bm_pmm_adc_id pmm_adc_ids_3[] = {
-+ N810BM_PMM_ADC_BATTEMP,
-+ };
-+
-+ /* Parse element 2 */
-+ err = pmm_record_get(bm, pmm_block, &elem, sizeof(elem),
-+ 1, 2, 0);
-+ if (err) {
-+ dev_err(&bm->pdev->dev,
-+ "PMM: Failed to get group 1 / element 2");
-+ return err;
-+ }
-+ if (elem.id == N810BM_PMM_ADC_0xFE && elem.flags == 0x05) {
-+ adc_calib = n810bm_get_adc_calib(bm, elem.id);
-+ if (!adc_calib) {
-+ dev_err(&bm->pdev->dev,
-+ "calib extract: Failed to get 0xFE calib");
-+ return -EINVAL;
-+ }
-+ adc_calib->id = elem.id;
-+ adc_calib->flags = elem.flags;
-+ adc_calib->field1 = le32_to_cpu(elem.field1);
-+ adc_calib->field2 = le32_to_cpu(elem.field2);
-+ }
-+
-+ err = extract_group1_elem(bm, pmm_block,
-+ pmm_adc_ids_1, ARRAY_SIZE(pmm_adc_ids_1),
-+ 0xFFFFFFFF, 0xFFFFFFFF);
-+ if (err)
-+ return err;
-+ err = extract_group1_elem(bm, pmm_block,
-+ pmm_adc_ids_2, ARRAY_SIZE(pmm_adc_ids_2),
-+ 0xFFFFFFFF, 0);
-+ if (err)
-+ return err;
-+ err = extract_group1_elem(bm, pmm_block,
-+ pmm_adc_ids_3, ARRAY_SIZE(pmm_adc_ids_3),
-+ 0xFFFFFFFF, 0x0000FFFF);
-+ if (err)
-+ return err;
-+
-+ return 0;
-+}
-+
-+static int n810bm_parse_pmm_group2(struct n810bm *bm,
-+ const struct firmware *pmm_block)
-+{
-+ dev_err(&bm->pdev->dev, "TODO: CAL BME PMM group 2 parser not implemented, yet");
-+ return -EOPNOTSUPP;
-+}
-+
-+static void n810bm_adc_calib_set_defaults(struct n810bm *bm)
-+{
-+ struct n810bm_adc_calib *adc_calib;
-+ unsigned int i;
-+
-+ static const struct n810bm_adc_calib defaults[] = {
-+ /* ADC group-nr 0 */
-+ {
-+ .id = N810BM_PMM_ADC_HEADSET,
-+ .flags = 0x00,
-+ .adc_groupnr = 0,
-+ }, {
-+ .id = N810BM_PMM_ADC_HOOKDET,
-+ .flags = 0x00,
-+ .adc_groupnr = 0,
-+ }, {
-+ .id = N810BM_PMM_ADC_RFGP,
-+ .flags = 0x00,
-+ .adc_groupnr = 0,
-+ }, {
-+ .id = N810BM_PMM_ADC_LIGHTSENS,
-+ .flags = 0x00,
-+ .adc_groupnr = 0,
-+ }, {
-+ .id = N810BM_PMM_ADC_WBTX,
-+ .flags = 0x00,
-+ .adc_groupnr = 0,
-+ }, {
-+ .id = N810BM_PMM_ADC_RETUTEMP,
-+ .flags = 0x00,
-+ .adc_groupnr = 0,
-+ }, {
-+ .id = N810BM_PMM_ADC_GND2,
-+ .flags = 0x00,
-+ .adc_groupnr = 0,
-+ },
-+ /* ADC group-nr 1 */
-+ {
-+ .id = N810BM_PMM_ADC_0xFE,
-+ .flags = 0x05,
-+ .adc_groupnr = 1,
-+ .field1 = (u32)-2,
-+ .field2 = 13189,
-+ }, {
-+ .id = N810BM_PMM_ADC_BATVOLT,
-+ .flags = 0x01,
-+ .adc_groupnr = 1,
-+ .field1 = 2527,
-+ .field2 = 21373,
-+ }, {
-+ .id = N810BM_PMM_ADC_CHGVOLT,
-+ .flags = 0x01,
-+ .adc_groupnr = 1,
-+ .field1 = 0,
-+ .field2 = 129848,
-+ }, {
-+ .id = N810BM_PMM_ADC_BKUPVOLT,
-+ .flags = 0x01,
-+ .adc_groupnr = 1,
-+ .field1 = 0,
-+ .field2 = 20000,
-+ }, {
-+ .id = N810BM_PMM_ADC_BATCURR,
-+ .flags = 0x06,
-+ .adc_groupnr = 1,
-+ .field1 = 0,
-+ .field2 = 9660,
-+ },
-+ /* ADC group-nr 2 */
-+ {
-+ .id = N810BM_PMM_ADC_BSI,
-+ .flags = 0x02,
-+ .adc_groupnr = 2,
-+ .field1 = 1169,
-+ .field2 = 0,
-+ },
-+ /* ADC group-nr 3 */
-+ {
-+ .id = N810BM_PMM_ADC_BATTEMP,
-+ .flags = 0x03,
-+ .adc_groupnr = 3,
-+ .field1 = 265423000,
-+ .field2 = 298,
-+ },
-+ /* ADC group-nr 4 */
-+ {
-+ .id = N810BM_PMM_ADC_LIGHTTEMP,
-+ .flags = 0x04,
-+ .adc_groupnr = 4,
-+ .field1 = 19533778,
-+ .field2 = 308019670,
-+ .field3 = 4700,
-+ .field4 = 2500,
-+ },
-+ };
-+
-+ /* Clear the array */
-+ memset(&bm->calib.adc, 0, sizeof(bm->calib.adc));
-+ for (i = 0; i < ARRAY_SIZE(bm->calib.adc); i++)
-+ bm->calib.adc[i].flags = 0xFF;
-+
-+ /* Copy the defaults */
-+ for (i = 0; i < ARRAY_SIZE(defaults); i++) {
-+ adc_calib = n810bm_get_adc_calib(bm, defaults[i].id);
-+ if (WARN_ON(!adc_calib))
-+ continue;
-+ *adc_calib = defaults[i];
-+ }
-+}
-+
-+static int n810bm_parse_pmm_block(struct n810bm *bm,
-+ const struct firmware *pmm_block)
-+{
-+ u8 byte;
-+ int err;
-+ unsigned int i, count;
-+ struct n810bm_adc_calib *adc_calib;
-+
-+ /* Initialize to defaults */
-+ n810bm_adc_calib_set_defaults(bm);
-+
-+ /* Parse the PMM data */
-+ err = pmm_record_get(bm, pmm_block, &byte, sizeof(byte),
-+ 1, 0, 0); /* group 1 / element 0 */
-+ err |= (byte != 0x01);
-+ err |= pmm_record_get(bm, pmm_block, &byte, sizeof(byte),
-+ 1, 1, 0); /* group 1 / element 1 */
-+ err |= (byte != 0x01);
-+ if (err)
-+ err = n810bm_parse_pmm_group2(bm, pmm_block);
-+ else
-+ err = n810bm_parse_pmm_group1(bm, pmm_block);
-+ if (err)
-+ return err;
-+
-+ /* Sanity checks */
-+ for (i = 0, count = 0; i < ARRAY_SIZE(bm->calib.adc); i++) {
-+ adc_calib = &bm->calib.adc[i];
-+ if (adc_calib->flags == 0xFF)
-+ continue;
-+ switch (adc_calib->id) {
-+ case N810BM_PMM_ADC_BATVOLT:
-+ if (adc_calib->field1 < 2400 ||
-+ adc_calib->field1 > 2700)
-+ goto value_check_fail;
-+ if (adc_calib->field2 < 20000 ||
-+ adc_calib->field2 > 23000)
-+ goto value_check_fail;
-+ count++;
-+ break;
-+ case N810BM_PMM_ADC_BSI:
-+ if (adc_calib->field1 < 1100 ||
-+ adc_calib->field1 > 1300)
-+ goto value_check_fail;
-+ count++;
-+ break;
-+ case N810BM_PMM_ADC_BATCURR:
-+ if (adc_calib->field2 < 7000 ||
-+ adc_calib->field2 > 12000)
-+ goto value_check_fail;
-+ count++;
-+ break;
-+ case N810BM_PMM_ADC_0xFE:
-+ if ((s32)adc_calib->field1 > 14 ||
-+ (s32)adc_calib->field1 < -14)
-+ goto value_check_fail;
-+ if (adc_calib->field2 < 13000 ||
-+ adc_calib->field2 > 13350)
-+ goto value_check_fail;
-+ count++;
-+ break;
-+ case N810BM_PMM_ADC_CHGVOLT:
-+ case N810BM_PMM_ADC_BATTEMP:
-+ case N810BM_PMM_ADC_BKUPVOLT:
-+ count++;
-+ break;
-+ case N810BM_PMM_ADC_GND2:
-+ case N810BM_PMM_ADC_HOOKDET:
-+ case N810BM_PMM_ADC_LIGHTSENS:
-+ case N810BM_PMM_ADC_HEADSET:
-+ case N810BM_PMM_ADC_LIGHTTEMP:
-+ case N810BM_PMM_ADC_RFGP:
-+ case N810BM_PMM_ADC_WBTX:
-+ case N810BM_PMM_ADC_RETUTEMP:
-+ break;
-+ }
-+ dev_dbg(&bm->pdev->dev,
-+ "ADC 0x%02X calib: 0x%02X 0x%02X 0x%08X 0x%08X 0x%04X 0x%04X",
-+ adc_calib->id, adc_calib->flags, adc_calib->adc_groupnr,
-+ adc_calib->field1, adc_calib->field2,
-+ adc_calib->field3, adc_calib->field4);
-+ }
-+ if (count != 7) {
-+ dev_err(&bm->pdev->dev, "PMM sanity check: Did not find "
-+ "all required values (count=%u)", count);
-+ goto check_fail;
-+ }
-+
-+ return 0;
-+
-+value_check_fail:
-+ dev_err(&bm->pdev->dev, "PMM image sanity check failed "
-+ "(id=%02X, field1=%08X, field2=%08X)",
-+ adc_calib->id, adc_calib->field1, adc_calib->field2);
-+check_fail:
-+ return -EILSEQ;
-+}
-+
-+/* Set the current measure timer that triggers on Tahvo IRQ 7
-+ * An interval of zero disables the timer. */
-+static void n810bm_set_current_measure_timer(struct n810bm *bm,
-+ u16 millisec_interval)
-+{
-+ u16 value = millisec_interval;
-+
-+ if (value <= 0xF905) {
-+ value = ((u64)0x10624DD3 * (u64)(value + 0xF9)) >> 32;
-+ value /= 16;
-+ } else
-+ value = 0xFF;
-+
-+ tahvo_write(bm, TAHVO_REG_BATCURRTIMER, value & 0xFF);
-+
-+ tahvo_set(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_CURTIMRST);
-+ tahvo_clear(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_CURTIMRST);
-+
-+ if (millisec_interval) {
-+ if (!bm->tahvo_irq_enabled) {
-+ bm->tahvo_irq_enabled = 1;
-+ enable_irq(bm->tahvo_irq);
-+ }
-+ } else {
-+ if (bm->tahvo_irq_enabled) {
-+ bm->tahvo_irq_enabled = 0;
-+ disable_irq_nosync(bm->tahvo_irq);
-+ }
-+ }
-+
-+ //TODO also do a software timer for safety.
-+}
-+
-+static void n810bm_enable_current_measure(struct n810bm *bm)
-+{
-+ WARN_ON(bm->current_measure_enabled < 0);
-+ if (!bm->current_measure_enabled) {
-+ /* Enable the current measurement circuitry */
-+ tahvo_set(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_CURMEAS);
-+ dev_dbg(&bm->pdev->dev,
-+ "Current measurement circuitry enabled");
-+ }
-+ bm->current_measure_enabled++;
-+}
-+
-+static void n810bm_disable_current_measure(struct n810bm *bm)
-+{
-+ bm->current_measure_enabled--;
-+ WARN_ON(bm->current_measure_enabled < 0);
-+ if (!bm->current_measure_enabled) {
-+ /* Disable the current measurement circuitry */
-+ tahvo_clear(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_CURMEAS);
-+ dev_dbg(&bm->pdev->dev,
-+ "Current measurement circuitry disabled");
-+ }
-+}
-+
-+/* Measure the actual battery current. Returns a signed value in mA.
-+ * Does only work, if current measurement was enabled. */
-+static int n810bm_measure_batt_current(struct n810bm *bm)
-+{
-+ u16 retval;
-+ int adc = 0, ma, i;
-+
-+ if (WARN_ON(bm->current_measure_enabled <= 0))
-+ return 0;
-+ for (i = 0; i < 3; i++) {
-+ retval = tahvo_read(bm, TAHVO_REG_BATCURR);
-+ adc += (s16)retval; /* Value is signed */
-+ }
-+ adc /= 3;
-+
-+ //TODO convert to mA
-+ ma = adc;
-+
-+ return ma;
-+}
-+
-+/* Requires bm->mutex locked */
-+static int n810bm_measure_batt_current_async(struct n810bm *bm)
-+{
-+ int ma;
-+ bool charging = lipocharge_is_charging(&bm->charger);
-+
-+ n810bm_enable_current_measure(bm);
-+ if (!charging)
-+ WARN_ON(bm->active_current_pwm != 0);
-+ tahvo_maskset(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_EN |
-+ TAHVO_REG_CHGCTL_PWMOVR |
-+ TAHVO_REG_CHGCTL_PWMOVRZERO,
-+ TAHVO_REG_CHGCTL_EN |
-+ TAHVO_REG_CHGCTL_PWMOVR |
-+ (charging ? 0 : TAHVO_REG_CHGCTL_PWMOVRZERO));
-+ ma = n810bm_measure_batt_current(bm);
-+ tahvo_maskset(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_EN |
-+ TAHVO_REG_CHGCTL_PWMOVR |
-+ TAHVO_REG_CHGCTL_PWMOVRZERO,
-+ (charging ? TAHVO_REG_CHGCTL_EN : 0));
-+ n810bm_disable_current_measure(bm);
-+
-+ return ma;
-+}
-+
-+static int adc_sanity_check(struct n810bm *bm, unsigned int channel)
-+{
-+ int value;
-+
-+ value = retu_read_adc(&n810bm_retu_device->dev, channel);
-+ if (value < 0) {
-+ dev_err(&bm->pdev->dev, "Failed to read GND ADC channel %u",
-+ channel);
-+ return -EIO;
-+ }
-+ dev_dbg(&bm->pdev->dev,
-+ "GND ADC channel %u sanity check got value: %d",
-+ channel, value);
-+ if (value > 5) {
-+ n810bm_emergency(bm, "GND ADC sanity check failed");
-+ return -EIO;
-+ }
-+
-+ return 0;
-+}
-+
-+static int n810bm_check_adc_sanity(struct n810bm *bm)
-+{
-+ int err;
-+
-+ /* Discard one conversion */
-+ retu_write(bm, RETU_REG_ADCSCR, 0);
-+ retu_read_adc(&n810bm_retu_device->dev, RETU_ADC_GND2);
-+
-+ err = adc_sanity_check(bm, RETU_ADC_GND2);
-+ if (err)
-+ return err;
-+
-+ return 0;
-+}
-+
-+/* Measure the battery voltage. Returns the value in mV (or negative value on error). */
-+static int n810bm_measure_batt_voltage(struct n810bm *bm)
-+{
-+ int adc;
-+ unsigned int mv;
-+ const unsigned int scale = 1000;
-+
-+ adc = retu_adc_average(bm, RETU_ADC_BATTVOLT, 5);
-+ if (adc < 0)
-+ return adc;
-+ if (adc <= 0x37)
-+ return 2800;
-+ mv = 2800 + ((adc - 0x37) * (((4200 - 2800) * scale) / (0x236 - 0x37))) / scale;
-+
-+ //TODO compensate for power consumption
-+ //TODO honor calibration values
-+
-+ return mv;
-+}
-+
-+/* Measure the charger voltage. Returns the value in mV (or negative value on error). */
-+static int n810bm_measure_charger_voltage(struct n810bm *bm)
-+{
-+ int adc;
-+ unsigned int mv;
-+
-+ adc = retu_adc_average(bm, RETU_ADC_CHGVOLT, 5);
-+ if (adc < 0)
-+ return adc;
-+ //TODO convert to mV
-+ mv = adc;
-+
-+ return mv;
-+}
-+
-+/* Measure backup battery voltage. Returns the value in mV (or negative value on error). */
-+static int n810bm_measure_backup_batt_voltage(struct n810bm *bm)
-+{
-+ int adc;
-+ unsigned int mv;
-+
-+ adc = retu_adc_average(bm, RETU_ADC_BKUPVOLT, 3);
-+ if (adc < 0)
-+ return adc;
-+ //TODO convert to mV
-+ mv = adc;
-+
-+ return mv;
-+}
-+
-+/* Measure the battery temperature. Returns the value in K (or negative value on error). */
-+static int n810bm_measure_batt_temp(struct n810bm *bm)
-+{
-+ int adc;
-+ unsigned int k;
-+
-+ adc = retu_adc_average(bm, RETU_ADC_BATTEMP, 3);
-+ if (adc < 0)
-+ return adc;
-+ //TODO convert to K
-+ k = adc;
-+
-+ return k;
-+}
-+
-+/* Read the battery capacity via BSI pin. */
-+static enum n810bm_capacity n810bm_read_batt_capacity(struct n810bm *bm)
-+{
-+ int adc;
-+ const unsigned int hyst = 20;
-+
-+ adc = retu_adc_average(bm, RETU_ADC_BSI, 5);
-+ if (adc < 0) {
-+ dev_err(&bm->pdev->dev, "Failed to read BSI ADC");
-+ return N810BM_CAP_UNKNOWN;
-+ }
-+
-+ if (adc >= 0x3B5 - hyst && adc <= 0x3B5 + hyst)
-+ return N810BM_CAP_1500MAH;
-+
-+ dev_err(&bm->pdev->dev, "Capacity indicator 0x%X unknown", adc);
-+
-+ return N810BM_CAP_UNKNOWN;
-+}
-+
-+/* Convert a battery voltage (in mV) to percentage. */
-+static unsigned int n810bm_mvolt2percent(unsigned int mv)
-+{
-+ const unsigned int minv = 3700;
-+ const unsigned int maxv = 4150;
-+ unsigned int percent;
-+
-+ mv = clamp(mv, minv, maxv);
-+ percent = (mv - minv) * 100 / (maxv - minv);
-+
-+ return percent;
-+}
-+
-+static void n810bm_start_charge(struct n810bm *bm)
-+{
-+ int err;
-+
-+ WARN_ON(!bm->battery_present);
-+ WARN_ON(!bm->charger_present);
-+
-+ /* Set PWM to zero */
-+ bm->active_current_pwm = 0;
-+ tahvo_write(bm, TAHVO_REG_CHGCURR, bm->active_current_pwm);
-+
-+ /* Charge global enable */
-+ tahvo_maskset(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_EN |
-+ TAHVO_REG_CHGCTL_PWMOVR |
-+ TAHVO_REG_CHGCTL_PWMOVRZERO,
-+ TAHVO_REG_CHGCTL_EN);
-+
-+ WARN_ON((int)bm->capacity <= 0);
-+ bm->charger.capacity = bm->capacity;
-+ err = lipocharge_start(&bm->charger);
-+ WARN_ON(err);
-+
-+ /* Initialize current measurement circuitry */
-+ n810bm_enable_current_measure(bm);
-+ n810bm_set_current_measure_timer(bm, 250);
-+
-+ dev_info(&bm->pdev->dev, "Charging battery");
-+ n810bm_notify_charger_state(bm);
-+ n810bm_notify_charger_pwm(bm);
-+}
-+
-+static void n810bm_stop_charge(struct n810bm *bm)
-+{
-+ if (lipocharge_is_charging(&bm->charger)) {
-+ n810bm_set_current_measure_timer(bm, 0);
-+ n810bm_disable_current_measure(bm);
-+ }
-+ lipocharge_stop(&bm->charger);
-+
-+ /* Set PWM to zero */
-+ bm->active_current_pwm = 0;
-+ tahvo_write(bm, TAHVO_REG_CHGCURR, bm->active_current_pwm);
-+
-+ /* Charge global disable */
-+ tahvo_maskset(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_EN |
-+ TAHVO_REG_CHGCTL_PWMOVR |
-+ TAHVO_REG_CHGCTL_PWMOVRZERO,
-+ 0);
-+
-+ dev_info(&bm->pdev->dev, "Not charging battery");
-+ n810bm_notify_charger_state(bm);
-+ n810bm_notify_charger_pwm(bm);
-+}
-+
-+/* Periodic check */
-+static void n810bm_periodic_check_work(struct work_struct *work)
-+{
-+ struct n810bm *bm = container_of(to_delayed_work(work),
-+ struct n810bm, periodic_check_work);
-+ u16 status;
-+ bool battery_was_present, charger_was_present;
-+ int mv;
-+
-+ mutex_lock(&bm->mutex);
-+
-+ status = retu_read(bm, RETU_REG_STATUS);
-+ battery_was_present = bm->battery_present;
-+ charger_was_present = bm->charger_present;
-+ bm->battery_present = !!(status & RETU_REG_STATUS_BATAVAIL);
-+ bm->charger_present = !!(status & RETU_REG_STATUS_CHGPLUG);
-+
-+ if (bm->battery_present != battery_was_present) {
-+ /* Battery state changed */
-+ if (bm->battery_present) {
-+ bm->capacity = n810bm_read_batt_capacity(bm);
-+ if (bm->capacity == N810BM_CAP_UNKNOWN) {
-+ dev_err(&bm->pdev->dev, "Unknown battery detected");
-+ } else {
-+ dev_info(&bm->pdev->dev, "Detected %u mAh battery",
-+ (unsigned int)bm->capacity);
-+ }
-+ } else {
-+ bm->capacity = N810BM_CAP_NONE;
-+ dev_info(&bm->pdev->dev, "The main battery was removed");
-+ //TODO disable charging
-+ }
-+ }
-+
-+ if (bm->charger_present != charger_was_present) {
-+ /* Charger state changed */
-+ dev_info(&bm->pdev->dev, "The charger was %s",
-+ bm->charger_present ? "plugged in" : "removed");
-+ n810bm_notify_charger_present(bm);
-+ }
-+
-+ if ((bm->battery_present && !bm->charger_present) ||
-+ !n810bm_known_battery_present(bm)){
-+ /* We're draining the battery */
-+ mv = n810bm_measure_batt_voltage(bm);
-+ if (mv < 0) {
-+ n810bm_emergency(bm,
-+ "check: Failed to measure voltage");
-+ }
-+ if (mv < N810BM_MIN_VOLTAGE_THRES) {
-+ n810bm_emergency(bm,
-+ "check: Minimum voltage threshold reached");
-+ }
-+ }
-+
-+ if (bm->charger_present && n810bm_known_battery_present(bm)) {
-+ /* Known battery and charger are connected */
-+ if (bm->charger_enabled) {
-+ /* Charger is enabled */
-+ if (!lipocharge_is_charging(&bm->charger)) {
-+ //TODO start charging, if battery is below some threshold
-+ n810bm_start_charge(bm);
-+ }
-+ }
-+ }
-+
-+ if (lipocharge_is_charging(&bm->charger) && !bm->charger_present) {
-+ /* Charger was unplugged. */
-+ n810bm_stop_charge(bm);
-+ }
-+
-+ mutex_unlock(&bm->mutex);
-+ schedule_delayed_work(&bm->periodic_check_work,
-+ round_jiffies_relative(N810BM_CHECK_INTERVAL));
-+}
-+
-+/*XXX
-+static void n810bm_adc_irq_handler(unsigned long data)
-+{
-+ struct n810bm *bm = (struct n810bm *)data;
-+
-+ retu_ack_irq(RETU_INT_ADCS);
-+ //TODO
-+dev_info(&bm->pdev->dev, "ADC interrupt triggered\n");
-+}
-+*/
-+
-+static irqreturn_t n810bm_tahvo_current_measure_irq_handler(int irq, void *data)
-+{
-+ struct n810bm *bm = data;
-+ int res, ma, mv, temp;
-+
-+ mutex_lock(&bm->mutex);
-+ if (!lipocharge_is_charging(&bm->charger))
-+ goto out_unlock;
-+
-+ tahvo_maskset(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_PWMOVR |
-+ TAHVO_REG_CHGCTL_PWMOVRZERO,
-+ TAHVO_REG_CHGCTL_PWMOVR);
-+ ma = n810bm_measure_batt_current(bm);
-+ tahvo_maskset(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_PWMOVR |
-+ TAHVO_REG_CHGCTL_PWMOVRZERO,
-+ TAHVO_REG_CHGCTL_PWMOVR |
-+ TAHVO_REG_CHGCTL_PWMOVRZERO);
-+ msleep(10);
-+ mv = n810bm_measure_batt_voltage(bm);
-+ tahvo_maskset(bm, TAHVO_REG_CHGCTL,
-+ TAHVO_REG_CHGCTL_PWMOVR |
-+ TAHVO_REG_CHGCTL_PWMOVRZERO,
-+ 0);
-+ temp = n810bm_measure_batt_temp(bm);
-+ if (WARN_ON(mv < 0))
-+ goto out_unlock;
-+ if (WARN_ON(temp < 0))
-+ goto out_unlock;
-+
-+ if (bm->verbose_charge_log) {
-+ dev_info(&bm->pdev->dev,
-+ "Battery charge state: %d mV, %d mA (%s)",
-+ mv, ma,
-+ (ma <= 0) ? "discharging" : "charging");
-+ }
-+ res = lipocharge_update_state(&bm->charger, mv, ma, temp);
-+ if (res) {
-+ if (res > 0)
-+ dev_info(&bm->pdev->dev, "Battery fully charged");
-+ n810bm_stop_charge(bm);
-+ }
-+out_unlock:
-+ mutex_unlock(&bm->mutex);
-+
-+ return IRQ_HANDLED;
-+}
-+
-+#define DEFINE_ATTR_NOTIFY(attr_name) \
-+ void n810bm_notify_##attr_name(struct n810bm *bm) \
-+ { \
-+ set_bit(N810BM_NOTIFY_##attr_name, &bm->notify_flags); \
-+ wmb(); \
-+ schedule_work(&bm->notify_work); \
-+ }
-+
-+#define DEFINE_SHOW_INT_FUNC(name, member) \
-+ static ssize_t n810bm_attr_##name##_show(struct device *dev, \
-+ struct device_attribute *attr, \
-+ char *buf) \
-+ { \
-+ struct n810bm *bm = device_to_n810bm(dev); \
-+ ssize_t count; \
-+ \
-+ mutex_lock(&bm->mutex); \
-+ count = snprintf(buf, PAGE_SIZE, "%d\n", (int)(bm->member)); \
-+ mutex_unlock(&bm->mutex); \
-+ \
-+ return count; \
-+ }
-+
-+#define DEFINE_STORE_INT_FUNC(name, member) \
-+ static ssize_t n810bm_attr_##name##_store(struct device *dev, \
-+ struct device_attribute *attr,\
-+ const char *buf, size_t count)\
-+ { \
-+ struct n810bm *bm = device_to_n810bm(dev); \
-+ long val; \
-+ int err; \
-+ \
-+ mutex_lock(&bm->mutex); \
-+ err = strict_strtol(buf, 0, &val); \
-+ if (!err) \
-+ bm->member = (typeof(bm->member))val; \
-+ mutex_unlock(&bm->mutex); \
-+ \
-+ return err ? err : count; \
-+ }
-+
-+#define DEFINE_ATTR_SHOW_INT(name, member) \
-+ DEFINE_SHOW_INT_FUNC(name, member) \
-+ static DEVICE_ATTR(name, S_IRUGO, \
-+ n810bm_attr_##name##_show, NULL);
-+
-+#define DEFINE_ATTR_SHOW_STORE_INT(name, member) \
-+ DEFINE_SHOW_INT_FUNC(name, member) \
-+ DEFINE_STORE_INT_FUNC(name, member) \
-+ static DEVICE_ATTR(name, S_IRUGO | S_IWUSR, \
-+ n810bm_attr_##name##_show, \
-+ n810bm_attr_##name##_store);
-+
-+DEFINE_ATTR_SHOW_INT(battery_present, battery_present);
-+DEFINE_ATTR_SHOW_INT(charger_present, charger_present);
-+static DEFINE_ATTR_NOTIFY(charger_present);
-+DEFINE_ATTR_SHOW_INT(charger_state, charger.state);
-+static DEFINE_ATTR_NOTIFY(charger_state);
-+DEFINE_ATTR_SHOW_INT(charger_pwm, active_current_pwm);
-+static DEFINE_ATTR_NOTIFY(charger_pwm);
-+DEFINE_ATTR_SHOW_STORE_INT(charger_enable, charger_enabled);
-+DEFINE_ATTR_SHOW_STORE_INT(charger_verbose, verbose_charge_log);
-+
-+static ssize_t n810bm_attr_battery_level_show(struct device *dev,
-+ struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct n810bm *bm = device_to_n810bm(dev);
-+ ssize_t count = -ENODEV;
-+ int millivolt;
-+
-+ mutex_lock(&bm->mutex);
-+ if (!bm->battery_present || lipocharge_is_charging(&bm->charger))
-+ millivolt = 0;
-+ else
-+ millivolt = n810bm_measure_batt_voltage(bm);
-+ if (millivolt >= 0) {
-+ count = snprintf(buf, PAGE_SIZE, "%u\n",
-+ n810bm_mvolt2percent(millivolt));
-+ }
-+ mutex_unlock(&bm->mutex);
-+
-+ return count;
-+}
-+static DEVICE_ATTR(battery_level, S_IRUGO,
-+ n810bm_attr_battery_level_show, NULL);
-+
-+static ssize_t n810bm_attr_battery_capacity_show(struct device *dev,
-+ struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct n810bm *bm = device_to_n810bm(dev);
-+ ssize_t count;
-+ int capacity = 0;
-+
-+ mutex_lock(&bm->mutex);
-+ if (n810bm_known_battery_present(bm))
-+ capacity = (int)bm->capacity;
-+ count = snprintf(buf, PAGE_SIZE, "%d\n", capacity);
-+ mutex_unlock(&bm->mutex);
-+
-+ return count;
-+}
-+static DEVICE_ATTR(battery_capacity, S_IRUGO,
-+ n810bm_attr_battery_capacity_show, NULL);
-+
-+static ssize_t n810bm_attr_battery_temp_show(struct device *dev,
-+ struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct n810bm *bm = device_to_n810bm(dev);
-+ ssize_t count = -ENODEV;
-+ int k;
-+
-+ mutex_lock(&bm->mutex);
-+ k = n810bm_measure_batt_temp(bm);
-+ if (k >= 0)
-+ count = snprintf(buf, PAGE_SIZE, "%d\n", k);
-+ mutex_unlock(&bm->mutex);
-+
-+ return count;
-+}
-+static DEVICE_ATTR(battery_temp, S_IRUGO,
-+ n810bm_attr_battery_temp_show, NULL);
-+
-+static ssize_t n810bm_attr_charger_voltage_show(struct device *dev,
-+ struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct n810bm *bm = device_to_n810bm(dev);
-+ ssize_t count = -ENODEV;
-+ int mv = 0;
-+
-+ mutex_lock(&bm->mutex);
-+ if (bm->charger_present)
-+ mv = n810bm_measure_charger_voltage(bm);
-+ if (mv >= 0)
-+ count = snprintf(buf, PAGE_SIZE, "%d\n", mv);
-+ mutex_unlock(&bm->mutex);
-+
-+ return count;
-+}
-+static DEVICE_ATTR(charger_voltage, S_IRUGO,
-+ n810bm_attr_charger_voltage_show, NULL);
-+
-+static ssize_t n810bm_attr_backup_battery_voltage_show(struct device *dev,
-+ struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct n810bm *bm = device_to_n810bm(dev);
-+ ssize_t count = -ENODEV;
-+ int mv;
-+
-+ mutex_lock(&bm->mutex);
-+ mv = n810bm_measure_backup_batt_voltage(bm);
-+ if (mv >= 0)
-+ count = snprintf(buf, PAGE_SIZE, "%d\n", mv);
-+ mutex_unlock(&bm->mutex);
-+
-+ return count;
-+}
-+static DEVICE_ATTR(backup_battery_voltage, S_IRUGO,
-+ n810bm_attr_backup_battery_voltage_show, NULL);
-+
-+static ssize_t n810bm_attr_battery_current_show(struct device *dev,
-+ struct device_attribute *attr,
-+ char *buf)
-+{
-+ struct n810bm *bm = device_to_n810bm(dev);
-+ ssize_t count = -ENODEV;
-+ int ma = 0;
-+
-+ mutex_lock(&bm->mutex);
-+ if (bm->battery_present)
-+ ma = n810bm_measure_batt_current_async(bm);
-+ count = snprintf(buf, PAGE_SIZE, "%d\n", ma);
-+ mutex_unlock(&bm->mutex);
-+
-+ return count;
-+}
-+static DEVICE_ATTR(battery_current, S_IRUGO,
-+ n810bm_attr_battery_current_show, NULL);
-+
-+static const struct device_attribute *n810bm_attrs[] = {
-+ &dev_attr_battery_present,
-+ &dev_attr_battery_level,
-+ &dev_attr_battery_current,
-+ &dev_attr_battery_capacity,
-+ &dev_attr_battery_temp,
-+ &dev_attr_backup_battery_voltage,
-+ &dev_attr_charger_present,
-+ &dev_attr_charger_state,
-+ &dev_attr_charger_verbose,
-+ &dev_attr_charger_voltage,
-+ &dev_attr_charger_enable,
-+ &dev_attr_charger_pwm,
-+};
-+
-+static void n810bm_notify_work(struct work_struct *work)
-+{
-+ struct n810bm *bm = container_of(work, struct n810bm, notify_work);
-+ unsigned long notify_flags;
-+
-+ notify_flags = xchg(&bm->notify_flags, 0);
-+ mb();
-+
-+#define do_notify(attr_name) \
-+ do { \
-+ if (notify_flags & (1 << N810BM_NOTIFY_##attr_name)) { \
-+ sysfs_notify(&bm->pdev->dev.kobj, NULL, \
-+ dev_attr_##attr_name.attr.name); \
-+ } \
-+ } while (0)
-+
-+ do_notify(charger_present);
-+ do_notify(charger_state);
-+ do_notify(charger_pwm);
-+}
-+
-+static int n810bm_charger_set_current_pwm(struct lipocharge *c,
-+ unsigned int duty_cycle)
-+{
-+ struct n810bm *bm = container_of(c, struct n810bm, charger);
-+ int err = -EINVAL;
-+
-+ WARN_ON(!mutex_is_locked(&bm->mutex));
-+ if (WARN_ON(duty_cycle > 0xFF))
-+ goto out;
-+ if (WARN_ON(!bm->charger_enabled))
-+ goto out;
-+ if (WARN_ON(!bm->battery_present || !bm->charger_present))
-+ goto out;
-+
-+ if (duty_cycle != bm->active_current_pwm) {
-+ bm->active_current_pwm = duty_cycle;
-+ tahvo_write(bm, TAHVO_REG_CHGCURR, duty_cycle);
-+ n810bm_notify_charger_pwm(bm);
-+ }
-+
-+ err = 0;
-+out:
-+
-+ return err;
-+}
-+
-+static void n810bm_charger_emergency(struct lipocharge *c)
-+{
-+ struct n810bm *bm = container_of(c, struct n810bm, charger);
-+
-+ n810bm_emergency(bm, "Battery charger fault");
-+}
-+
-+static void n810bm_hw_exit(struct n810bm *bm)
-+{
-+ n810bm_stop_charge(bm);
-+ retu_write(bm, RETU_REG_ADCSCR, 0);
-+}
-+
-+static int n810bm_hw_init(struct n810bm *bm)
-+{
-+ int err;
-+
-+ err = n810bm_check_adc_sanity(bm);
-+ if (err)
-+ return err;
-+
-+ n810bm_stop_charge(bm);
-+
-+ return 0;
-+}
-+
-+static void n810bm_cancel_and_flush_work(struct n810bm *bm)
-+{
-+ cancel_delayed_work_sync(&bm->periodic_check_work);
-+ cancel_work_sync(&bm->notify_work);
-+ flush_scheduled_work();
-+}
-+
-+static int n810bm_device_init(struct n810bm *bm)
-+{
-+ int attr_index;
-+ int err;
-+
-+ bm->charger.rate = LIPORATE_p6C;
-+ bm->charger.top_voltage = 4100;
-+ bm->charger.duty_cycle_max = 0xFF;
-+ bm->charger.set_current_pwm = n810bm_charger_set_current_pwm;
-+ bm->charger.emergency = n810bm_charger_emergency;
-+ lipocharge_init(&bm->charger, &bm->pdev->dev);
-+
-+ err = n810bm_hw_init(bm);
-+ if (err)
-+ goto error;
-+ for (attr_index = 0; attr_index < ARRAY_SIZE(n810bm_attrs); attr_index++) {
-+ err = device_create_file(&bm->pdev->dev, n810bm_attrs[attr_index]);
-+ if (err)
-+ goto err_unwind_attrs;
-+ }
-+/*XXX
-+ err = retu_request_irq(RETU_INT_ADCS,
-+ n810bm_adc_irq_handler,
-+ (unsigned long)bm, "n810bm");
-+ if (err)
-+ goto err_unwind_attrs;
-+*/
-+ bm->tahvo_irq = platform_get_irq(n810bm_tahvo_device, 0);
-+ err = request_threaded_irq(bm->tahvo_irq, NULL,
-+ n810bm_tahvo_current_measure_irq_handler,
-+ IRQF_ONESHOT, "tahvo-n810bm", bm);
-+ if (err)
-+ goto err_free_retu_irq;
-+ disable_irq_nosync(bm->tahvo_irq);
-+ bm->tahvo_irq_enabled = 0;
-+
-+ schedule_delayed_work(&bm->periodic_check_work,
-+ round_jiffies_relative(N810BM_CHECK_INTERVAL));
-+
-+ bm->initialized = 1;
-+ dev_info(&bm->pdev->dev, "Battery management initialized");
-+
-+ return 0;
-+
-+err_free_retu_irq:
-+//XXX retu_free_irq(RETU_INT_ADCS);
-+err_unwind_attrs:
-+ for (attr_index--; attr_index >= 0; attr_index--)
-+ device_remove_file(&bm->pdev->dev, n810bm_attrs[attr_index]);
-+/*err_exit:*/
-+ n810bm_hw_exit(bm);
-+error:
-+ n810bm_cancel_and_flush_work(bm);
-+
-+ return err;
-+}
-+
-+static void n810bm_device_exit(struct n810bm *bm)
-+{
-+ int i;
-+
-+ if (!bm->initialized)
-+ return;
-+
-+ lipocharge_exit(&bm->charger);
-+ free_irq(bm->tahvo_irq, bm);
-+//XXX retu_free_irq(RETU_INT_ADCS);
-+ for (i = 0; i < ARRAY_SIZE(n810bm_attrs); i++)
-+ device_remove_file(&bm->pdev->dev, n810bm_attrs[i]);
-+
-+ n810bm_cancel_and_flush_work(bm);
-+
-+ n810bm_hw_exit(bm);
-+
-+ bm->initialized = 0;
-+}
-+
-+static void n810bm_pmm_block_found(const struct firmware *fw, void *context)
-+{
-+ struct n810bm *bm = context;
-+ int err;
-+
-+ if (!fw) {
-+ dev_err(&bm->pdev->dev,
-+ "CAL PMM block image file not found");
-+ goto err_release;
-+ }
-+ if (fw->size != N810BM_PMM_BLOCK_SIZE ||
-+ memcmp(fw->data, "BME-PMM-BLOCK01", 15) != 0) {
-+ dev_err(&bm->pdev->dev,
-+ "CAL PMM block image file has an invalid format");
-+ goto err_release;
-+ }
-+
-+ err = n810bm_parse_pmm_block(bm, fw);
-+ if (err)
-+ goto err_release;
-+ release_firmware(fw);
-+
-+ err = n810bm_device_init(bm);
-+ if (err) {
-+ dev_err(&bm->pdev->dev,
-+ "Failed to initialized battery management (%d)", err);
-+ goto error;
-+ }
-+
-+ return;
-+err_release:
-+ release_firmware(fw);
-+error:
-+ return;
-+}
-+
-+static int __devinit n810bm_probe(void)
-+{
-+ struct n810bm *bm;
-+ int err;
-+
-+ if (!n810bm_retu_device || !n810bm_tahvo_device)
-+ return 0;
-+
-+ bm = kzalloc(sizeof(*bm), GFP_KERNEL);
-+ if (!bm)
-+ return -ENOMEM;
-+ bm->pdev = n810bm_retu_device;
-+ platform_set_drvdata(n810bm_retu_device, bm);
-+ platform_set_drvdata(n810bm_tahvo_device, bm);
-+ mutex_init(&bm->mutex);
-+ INIT_DELAYED_WORK(&bm->periodic_check_work, n810bm_periodic_check_work);
-+ INIT_WORK(&bm->notify_work, n810bm_notify_work);
-+
-+ dev_info(&bm->pdev->dev, "Requesting CAL BME PMM block firmware file "
-+ N810BM_PMM_BLOCK_FILENAME);
-+ err = request_firmware_nowait(THIS_MODULE, 1,
-+ N810BM_PMM_BLOCK_FILENAME,
-+ &bm->pdev->dev, GFP_KERNEL,
-+ bm, n810bm_pmm_block_found);
-+ if (err) {
-+ dev_err(&bm->pdev->dev,
-+ "Failed to request CAL PMM block image file (%d)", err);
-+ goto err_free;
-+ }
-+
-+ return 0;
-+
-+err_free:
-+ kfree(bm);
-+
-+ return err;
-+}
-+
-+static void __devexit n810bm_remove(void)
-+{
-+ struct n810bm *bm;
-+
-+ if (!n810bm_retu_device || !n810bm_tahvo_device)
-+ return;
-+ bm = platform_get_drvdata(n810bm_retu_device);
-+
-+ n810bm_device_exit(bm);
-+
-+ kfree(bm);
-+ platform_set_drvdata(n810bm_retu_device, NULL);
-+ platform_set_drvdata(n810bm_tahvo_device, NULL);
-+}
-+
-+static int __devinit n810bm_retu_probe(struct platform_device *pdev)
-+{
-+ n810bm_retu_device = pdev;
-+ return n810bm_probe();
-+}
-+
-+static int __devexit n810bm_retu_remove(struct platform_device *pdev)
-+{
-+ n810bm_remove();
-+ n810bm_retu_device = NULL;
-+ return 0;
-+}
-+
-+static int __devinit n810bm_tahvo_probe(struct platform_device *pdev)
-+{
-+ n810bm_tahvo_device = pdev;
-+ return n810bm_probe();
-+}
-+
-+static int __devexit n810bm_tahvo_remove(struct platform_device *pdev)
-+{
-+ n810bm_remove();
-+ n810bm_tahvo_device = NULL;
-+ return 0;
-+}
-+
-+static struct platform_driver n810bm_retu_driver = {
-+ .remove = __devexit_p(n810bm_retu_remove),
-+ .driver = {
-+ .name = "retu-n810bm",
-+ }
-+};
-+
-+static struct platform_driver n810bm_tahvo_driver = {
-+ .remove = __devexit_p(n810bm_tahvo_remove),
-+ .driver = {
-+ .name = "tahvo-n810bm",
-+ }
-+};
-+
-+static int __init n810bm_modinit(void)
-+{
-+ int err;
-+
-+ err = platform_driver_probe(&n810bm_retu_driver, n810bm_retu_probe);
-+ if (err)
-+ return err;
-+ err = platform_driver_probe(&n810bm_tahvo_driver, n810bm_tahvo_probe);
-+ if (err) {
-+ platform_driver_unregister(&n810bm_retu_driver);
-+ return err;
-+ }
-+
-+ return 0;
-+}
-+module_init(n810bm_modinit);
-+
-+static void __exit n810bm_modexit(void)
-+{
-+ platform_driver_unregister(&n810bm_tahvo_driver);
-+ platform_driver_unregister(&n810bm_retu_driver);
-+}
-+module_exit(n810bm_modexit);
-+
-+MODULE_DESCRIPTION("Nokia n810 battery management");
-+MODULE_FIRMWARE(N810BM_PMM_BLOCK_FILENAME);
-+MODULE_LICENSE("GPL");
-+MODULE_AUTHOR("Michael Buesch");
---- /dev/null
-+++ b/drivers/cbus/lipocharge.c
-@@ -0,0 +1,183 @@
-+/*
-+ * Generic LIPO battery charger
-+ *
-+ * Copyright (c) 2010-2011 Michael Buesch <mb@bu3sch.de>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version 2
-+ * of the License, or (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#define DEBUG
-+
-+#include "lipocharge.h"
-+
-+#include <linux/slab.h>
-+
-+
-+/* Hysteresis constants */
-+#define CURRENT_HYST 30 /* mA */
-+#define VOLTAGE_HYST 10 /* mV */
-+
-+/* Threshold constants */
-+#define FINISH_CURRENT_PERCENT 3
-+
-+
-+/* Returns the requested first-stage charge current in mA */
-+static inline unsigned int get_stage1_charge_current(struct lipocharge *c)
-+{
-+ /* current = (capacity * C) */
-+ return c->capacity * c->rate / 1000;
-+}
-+
-+void lipocharge_init(struct lipocharge *c, struct device *dev)
-+{
-+ c->dev = dev;
-+ c->state = LIPO_IDLE;
-+}
-+
-+void lipocharge_exit(struct lipocharge *c)
-+{
-+ c->state = LIPO_IDLE;
-+}
-+
-+int lipocharge_start(struct lipocharge *c)
-+{
-+ int err;
-+
-+ if (c->state != LIPO_IDLE)
-+ return -EBUSY;
-+ if (!c->set_current_pwm || !c->emergency)
-+ return -EINVAL;
-+ if (!c->top_voltage || c->top_voltage > 4200)
-+ return -EINVAL;
-+
-+ c->active_duty_cycle = 0;
-+ err = c->set_current_pwm(c, c->active_duty_cycle);
-+ if (err)
-+ return err;
-+ c->state = LIPO_FIRST_STAGE;
-+
-+ return 0;
-+}
-+
-+void lipocharge_stop(struct lipocharge *c)
-+{
-+ if (c->state == LIPO_IDLE)
-+ return;
-+ c->state = LIPO_IDLE;
-+}
-+
-+static int lipocharge_increase_current(struct lipocharge *c,
-+ unsigned int inc_permille)
-+{
-+ int old_pwm, new_pwm;
-+
-+ if (c->active_duty_cycle >= c->duty_cycle_max)
-+ return 0;
-+
-+ old_pwm = c->active_duty_cycle;
-+ new_pwm = old_pwm + (c->duty_cycle_max * inc_permille / 1000);
-+ new_pwm = min(new_pwm, (int)c->duty_cycle_max);
-+ c->active_duty_cycle = new_pwm;
-+
-+ dev_dbg(c->dev, "lipo: Increasing duty_cycle by "
-+ "%u permille (0x%02X -> 0x%02X)",
-+ inc_permille, old_pwm, new_pwm);
-+
-+ return c->set_current_pwm(c, c->active_duty_cycle);
-+}
-+
-+static int lipocharge_decrease_current(struct lipocharge *c,
-+ unsigned int dec_permille)
-+{
-+ int old_pwm, new_pwm;
-+
-+ if (c->active_duty_cycle <= 0)
-+ return 0;
-+
-+ old_pwm = c->active_duty_cycle;
-+ new_pwm = old_pwm - (c->duty_cycle_max * dec_permille / 1000);
-+ new_pwm = max(0, new_pwm);
-+ c->active_duty_cycle = new_pwm;
-+
-+ dev_dbg(c->dev, "lipo: Decreasing duty_cycle by "
-+ "%u permille (0x%02X -> 0x%02X)",
-+ dec_permille, old_pwm, new_pwm);
-+
-+ return c->set_current_pwm(c, c->active_duty_cycle);
-+}
-+
-+/** lipocharge_update_state - Update the charge state
-+ * @c: The context.
-+ * @voltage_mV: The measured battery voltage.
-+ * @current_mA: The measured charge current.
-+ * negative -> drain.
-+ * positive -> charge.
-+ * @temp_K: Battery temperature in K.
-+ *
-+ * Returns 0 on success, -1 on error.
-+ * Returns 1, if the charging process is finished.
-+ */
-+int lipocharge_update_state(struct lipocharge *c,
-+ unsigned int voltage_mV,
-+ int current_mA,
-+ unsigned int temp_K)
-+{
-+ int requested_current, current_diff;
-+ int err;
-+ unsigned int permille;
-+
-+ //TODO temp
-+
-+restart:
-+ switch (c->state) {
-+ case LIPO_IDLE:
-+ dev_err(c->dev, "%s: called while idle", __func__);
-+ return -EINVAL;
-+ case LIPO_FIRST_STAGE: /* Constant current */
-+//printk("GOT %u %d %u\n", voltage_mV, current_mA, temp_K);
-+ if (voltage_mV >= c->top_voltage) {
-+ /* Float voltage reached.
-+ * Switch charger mode to "constant current" */
-+ c->state = LIPO_SECOND_STAGE;
-+ dev_dbg(c->dev, "Switched to second charging stage.");
-+ goto restart;
-+ }
-+ /* Float voltage not reached, yet.
-+ * Try to get the requested constant current. */
-+ requested_current = get_stage1_charge_current(c);
-+ if (current_mA < 0)
-+ current_mA = 0;
-+ current_diff = requested_current - current_mA;
-+ if (abs(requested_current - current_mA) > CURRENT_HYST) {
-+ if (current_diff > 0) {
-+ /* Increase current */
-+ permille = current_diff * 1000 / requested_current;
-+ permille /= 2;
-+ err = lipocharge_increase_current(c, permille);
-+ if (err)
-+ return err;
-+ } else {
-+ /* Decrease current */
-+ permille = (-current_diff) * 1000 / requested_current;
-+ permille /= 2;
-+ err = lipocharge_decrease_current(c, permille);
-+ if (err)
-+ return err;
-+ }
-+ }
-+ break;
-+ case LIPO_SECOND_STAGE: /* Constant voltage */
-+ //TODO
-+ break;
-+ }
-+
-+ return 0;
-+}
---- /dev/null
-+++ b/drivers/cbus/lipocharge.h
-@@ -0,0 +1,60 @@
-+#ifndef LIPOCHARGE_H_
-+#define LIPOCHARGE_H_
-+
-+#include <linux/types.h>
-+#include <linux/device.h>
-+
-+
-+#define LIPORATE(a,b) (((a) * 1000) + ((b) * 100))
-+#define LIPORATE_p6C LIPORATE(0,6) /* 0.6C */
-+
-+enum lipocharge_state {
-+ LIPO_IDLE = 0, /* Not charging */
-+ LIPO_FIRST_STAGE, /* Charging: constant current */
-+ LIPO_SECOND_STAGE, /* Charging: constant voltage */
-+};
-+
-+/** struct lipocharge - A generic LIPO charger
-+ *
-+ * @capacity: Battery capacity in mAh.
-+ * @rate: Charge rate.
-+ * @top_voltage: Fully charged voltage, in mV.
-+ * @duty_cycle_max: Max value for duty_cycle.
-+ *
-+ * @set_charge_current: Set the charge current PWM duty cycle.
-+ * @emergency: Something went wrong. Force shutdown.
-+ */
-+struct lipocharge {
-+ unsigned int capacity;
-+ unsigned int rate;
-+ unsigned int top_voltage;
-+ unsigned int duty_cycle_max;
-+
-+ int (*set_current_pwm)(struct lipocharge *c, unsigned int duty_cycle);
-+ void (*emergency)(struct lipocharge *c);
-+
-+ /* internal */
-+ struct device *dev;
-+ enum lipocharge_state state;
-+ unsigned int active_duty_cycle;
-+
-+ //TODO implement timer to cut power after maximum charge time.
-+};
-+
-+void lipocharge_init(struct lipocharge *c, struct device *dev);
-+void lipocharge_exit(struct lipocharge *c);
-+
-+int lipocharge_start(struct lipocharge *c);
-+void lipocharge_stop(struct lipocharge *c);
-+
-+int lipocharge_update_state(struct lipocharge *c,
-+ unsigned int voltage_mV,
-+ int current_mA,
-+ unsigned int temp_K);
-+
-+static inline bool lipocharge_is_charging(struct lipocharge *c)
-+{
-+ return (c->state != LIPO_IDLE);
-+}
-+
-+#endif /* LIPOCHARGE_H_ */
---- a/drivers/cbus/cbus.c
-+++ b/drivers/cbus/cbus.c
-@@ -36,6 +36,7 @@
- #include <linux/gpio.h>
- #include <linux/platform_device.h>
- #include <linux/platform_data/cbus.h>
-+#include <linux/reboot.h>
-
- #include "cbus.h"
-
-@@ -326,6 +327,13 @@ static void __exit cbus_bus_exit(void)
- }
- module_exit(cbus_bus_exit);
-
-+void cbus_emergency(void)
-+{
-+ machine_power_off();
-+ panic("cbus: Failed to halt machine in emergency state\n");
-+}
-+EXPORT_SYMBOL(cbus_emergency);
-+
- MODULE_DESCRIPTION("CBUS serial protocol");
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Juha Yrjölä");
---- a/drivers/cbus/cbus.h
-+++ b/drivers/cbus/cbus.h
-@@ -27,4 +27,6 @@ extern int cbus_read_reg(struct device *
- extern int cbus_write_reg(struct device *, unsigned dev, unsigned reg,
- unsigned val);
-
-+void cbus_emergency(void) __noreturn;
-+
- #endif /* __DRIVERS_CBUS_CBUS_H */
---- a/drivers/cbus/retu.c
-+++ b/drivers/cbus/retu.c
-@@ -399,6 +399,11 @@ static int retu_allocate_children(struct
- if (!child)
- return -ENOMEM;
-
-+ child = retu_allocate_child("retu-n810bm", parent, irq_base,
-+ RETU_INT_ADCS, -1, 1);
-+ if (!child)
-+ return -ENOMEM;
-+
- return 0;
- }
-
---- a/drivers/cbus/tahvo.c
-+++ b/drivers/cbus/tahvo.c
-@@ -129,6 +129,7 @@ void tahvo_set_clear_reg_bits(struct dev
- __tahvo_write_reg(tahvo, reg, w);
- mutex_unlock(&tahvo->mutex);
- }
-+EXPORT_SYMBOL(tahvo_set_clear_reg_bits);
-
- static irqreturn_t tahvo_irq_handler(int irq, void *_tahvo)
- {
-@@ -292,6 +293,11 @@ static int tahvo_allocate_children(struc
- if (!child)
- return -ENOMEM;
-
-+ child = tahvo_allocate_child("tahvo-n810bm", parent,
-+ irq_base + TAHVO_INT_BATCURR);
-+ if (!child)
-+ return -ENOMEM;
-+
- return 0;
- }
-
projects / 15.05 / openwrt.git / blobdiff