From 5c105d9f3fd086aff195d3849dcf847d6b0bd927 Mon Sep 17 00:00:00 2001 From: blogic Date: Fri, 5 Oct 2012 10:12:53 +0000 Subject: branch Attitude Adjustment git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33625 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../patches-3.3/900-n810-battery-management.patch | 1917 ++++++++++++++++++++ 1 file changed, 1917 insertions(+) create mode 100644 target/linux/omap24xx/patches-3.3/900-n810-battery-management.patch (limited to 'target/linux/omap24xx/patches-3.3/900-n810-battery-management.patch') diff --git a/target/linux/omap24xx/patches-3.3/900-n810-battery-management.patch b/target/linux/omap24xx/patches-3.3/900-n810-battery-management.patch new file mode 100644 index 000000000..bdec65f77 --- /dev/null +++ b/target/linux/omap24xx/patches-3.3/900-n810-battery-management.patch @@ -0,0 +1,1917 @@ +--- 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 ++ * ++ * 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 ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#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 ++ * ++ * 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 ++ ++ ++/* 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 ++#include ++ ++ ++#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 + #include + #include ++#include + + #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; + } + -- cgit v1.2.3