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omap24xx: Improve n810 battery management

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SVN-Revision: 23282
This commit is contained in:
Michael Büsch 2010-10-07 09:58:37 +00:00
parent b826e42476
commit 7178dc62a4
3 changed files with 225 additions and 75 deletions
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2
target/linux/omap24xx/Makefile
View file

@ -12,7 +12,7 @@ BOARDNAME:=TI OMAP-24xx
MAINTAINER:=Michael Buesch <mb@bu3sch.de>
FEATURES:=targz squashfs jffs2 usb usbgadget display gpio audio
LINUX_VERSION:=2.6.36-rc6
LINUX_VERSION:=2.6.36-rc7
define Target/Description
TI OMAP-24xx

42
target/linux/omap24xx/patches-2.6.36/500-cbus.patch
View file

@ -20,7 +20,7 @@
18 files changed, 4533 insertions(+), 1 deletion(-)
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/cbus.c
+++ linux-2.6.36-rc7/drivers/cbus/cbus.c
@@ -0,0 +1,309 @@
+/*
+ * drivers/cbus/cbus.c
@ -332,7 +332,7 @@
+MODULE_AUTHOR("Mikko Ylinen");
+
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/cbus.h
+++ linux-2.6.36-rc7/drivers/cbus/cbus.h
@@ -0,0 +1,36 @@
+/*
+ * drivers/cbus/cbus.h
@ -371,7 +371,7 @@
+
+#endif /* __DRIVERS_CBUS_CBUS_H */
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/Kconfig
+++ linux-2.6.36-rc7/drivers/cbus/Kconfig
@@ -0,0 +1,89 @@
+#
+# CBUS device configuration
@ -463,7 +463,7 @@
+
+endmenu
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/Makefile
+++ linux-2.6.36-rc7/drivers/cbus/Makefile
@@ -0,0 +1,14 @@
+#
+# Makefile for CBUS.
@ -480,7 +480,7 @@
+obj-$(CONFIG_CBUS_RETU_USER) += retu-user.o
+obj-$(CONFIG_CBUS_RETU_HEADSET) += retu-headset.o
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/retu.c
+++ linux-2.6.36-rc7/drivers/cbus/retu.c
@@ -0,0 +1,468 @@
+/**
+ * drivers/cbus/retu.c
@ -951,7 +951,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juha Yrjölä, David Weinehall, and Mikko Ylinen");
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/retu.h
+++ linux-2.6.36-rc7/drivers/cbus/retu.h
@@ -0,0 +1,77 @@
+/**
+ * drivers/cbus/retu.h
@ -1031,7 +1031,7 @@
+
+#endif /* __DRIVERS_CBUS_RETU_H */
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/retu-headset.c
+++ linux-2.6.36-rc7/drivers/cbus/retu-headset.c
@@ -0,0 +1,356 @@
+/**
+ * Retu/Vilma headset detection
@ -1390,7 +1390,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juha Yrjölä");
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/retu-pwrbutton.c
+++ linux-2.6.36-rc7/drivers/cbus/retu-pwrbutton.c
@@ -0,0 +1,118 @@
+/**
+ * drivers/cbus/retu-pwrbutton.c
@ -1511,7 +1511,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ari Saastamoinen");
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/retu-rtc.c
+++ linux-2.6.36-rc7/drivers/cbus/retu-rtc.c
@@ -0,0 +1,477 @@
+/**
+ * drivers/cbus/retu-rtc.c
@ -1991,7 +1991,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Paul Mundt and Igor Stoppa");
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/retu-user.c
+++ linux-2.6.36-rc7/drivers/cbus/retu-user.c
@@ -0,0 +1,424 @@
+/**
+ * drivers/cbus/retu-user.c
@ -2418,7 +2418,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mikko Ylinen");
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/retu-wdt.c
+++ linux-2.6.36-rc7/drivers/cbus/retu-wdt.c
@@ -0,0 +1,387 @@
+/**
+ * drivers/cbus/retu-wdt.c
@ -2808,7 +2808,7 @@
+MODULE_LICENSE("GPL");
+
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/tahvo.c
+++ linux-2.6.36-rc7/drivers/cbus/tahvo.c
@@ -0,0 +1,443 @@
+/**
+ * drivers/cbus/tahvo.c
@ -3254,7 +3254,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juha Yrjölä, David Weinehall, and Mikko Ylinen");
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/tahvo.h
+++ linux-2.6.36-rc7/drivers/cbus/tahvo.h
@@ -0,0 +1,61 @@
+/*
+ * drivers/cbus/tahvo.h
@ -3318,7 +3318,7 @@
+
+#endif /* __DRIVERS_CBUS_TAHVO_H */
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/tahvo-usb.c
+++ linux-2.6.36-rc7/drivers/cbus/tahvo-usb.c
@@ -0,0 +1,788 @@
+/**
+ * drivers/cbus/tahvo-usb.c
@ -4109,7 +4109,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juha Yrjölä, Tony Lindgren, and Timo Teräs");
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/tahvo-user.c
+++ linux-2.6.36-rc7/drivers/cbus/tahvo-user.c
@@ -0,0 +1,406 @@
+/**
+ * drivers/cbus/tahvo-user.c
@ -4518,7 +4518,7 @@
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mikko Ylinen");
--- /dev/null
+++ linux-2.6.36-rc4/drivers/cbus/user_retu_tahvo.h
+++ linux-2.6.36-rc7/drivers/cbus/user_retu_tahvo.h
@@ -0,0 +1,75 @@
+/**
+ * drivers/cbus/user_retu_tahvo.h
@ -4595,8 +4595,8 @@
+};
+
+#endif
--- linux-2.6.36-rc4.orig/drivers/Makefile
+++ linux-2.6.36-rc4/drivers/Makefile
--- linux-2.6.36-rc7.orig/drivers/Makefile
+++ linux-2.6.36-rc7/drivers/Makefile
@@ -74,7 +74,7 @@ obj-$(CONFIG_GAMEPORT) += input/gamepor
obj-$(CONFIG_INPUT) += input/
obj-$(CONFIG_I2O) += message/
@ -4606,9 +4606,9 @@
obj-$(CONFIG_PPS) += pps/
obj-$(CONFIG_W1) += w1/
obj-$(CONFIG_POWER_SUPPLY) += power/
--- linux-2.6.36-rc4.orig/arch/arm/Kconfig
+++ linux-2.6.36-rc4/arch/arm/Kconfig
@@ -1760,6 +1760,10 @@ source "net/Kconfig"
--- linux-2.6.36-rc7.orig/arch/arm/Kconfig
+++ linux-2.6.36-rc7/arch/arm/Kconfig
@@ -1785,6 +1785,10 @@ source "net/Kconfig"
source "drivers/Kconfig"

256
target/linux/omap24xx/patches-2.6.36/900-n810-battery-management.patch
View file

@ -1,14 +1,17 @@
---
arch/arm/mach-omap2/board-n8x0.c | 13 +
drivers/cbus/Kconfig | 12 +
drivers/cbus/Makefile | 1
drivers/cbus/n810bm.c | 396 +++++++++++++++++++++++++++++++++++++++
drivers/cbus/Makefile | 3
drivers/cbus/lipocharge.c | 63 ++++++
drivers/cbus/lipocharge.h | 50 ++++
drivers/cbus/n810bm_main.c | 397 +++++++++++++++++++++++++++++++++++++++
drivers/cbus/retu.c | 4
drivers/cbus/retu.h | 2
6 files changed, 425 insertions(+), 3 deletions(-)
drivers/cbus/retu.h | 3
drivers/cbus/tahvo.h | 6
9 files changed, 548 insertions(+), 3 deletions(-)
--- linux-2.6.36-rc5.orig/drivers/cbus/Kconfig
+++ linux-2.6.36-rc5/drivers/cbus/Kconfig
--- linux-2.6.36-rc7.orig/drivers/cbus/Kconfig
+++ linux-2.6.36-rc7/drivers/cbus/Kconfig
@@ -94,4 +94,16 @@ config CBUS_RETU_HEADSET
to Retu/Vilma. Detection state and events are exposed through
sysfs.
@ -26,16 +29,18 @@
+ If unsure, say N.
+
endmenu
--- linux-2.6.36-rc5.orig/drivers/cbus/Makefile
+++ linux-2.6.36-rc5/drivers/cbus/Makefile
@@ -12,3 +12,4 @@ obj-$(CONFIG_CBUS_RETU_WDT) += retu-wdt.
--- linux-2.6.36-rc7.orig/drivers/cbus/Makefile
+++ linux-2.6.36-rc7/drivers/cbus/Makefile
@@ -12,3 +12,6 @@ obj-$(CONFIG_CBUS_RETU_WDT) += retu-wdt.
obj-$(CONFIG_CBUS_TAHVO_USER) += tahvo-user.o
obj-$(CONFIG_CBUS_RETU_USER) += retu-user.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
+++ linux-2.6.36-rc5/drivers/cbus/n810bm.c
@@ -0,0 +1,396 @@
+++ linux-2.6.36-rc7/drivers/cbus/n810bm_main.c
@@ -0,0 +1,397 @@
+/*
+ * Nokia n810 battery management
+ *
@ -66,13 +71,11 @@
+
+#include "retu.h"
+#include "tahvo.h"
+#include "lipocharge.h"
+
+
+#define N810BM_CHECK_INTERVAL (HZ * 5)
+#define N810BM_MIN_VOLTAGE_THRES 3400 /* Absolute minimum voltage threshold */
+/* FIXME: Not sure about the actual value of the low threshold, yet.
+ * We must give userspace a chance to detect undervoltage and perform
+ * a clean shutdown, before we flip the big switch. */
+#define N810BM_MIN_VOLTAGE_THRES 3300 /* Absolute minimum voltage threshold */
+
+
+/* Battery related retu ADC channels */
@ -126,8 +129,12 @@
+
+struct n810bm {
+ struct platform_device *pdev;
+
+ enum n810bm_capacity capacity;
+ struct timer_list check_timer;
+
+ struct lipocharge *charger;
+
+ spinlock_t lock;
+};
+
@ -135,7 +142,7 @@
+static NORET_TYPE void n810bm_emergency(struct n810bm *bm, const char *message) ATTRIB_NORET;
+static void n810bm_emergency(struct n810bm *bm, const char *message)
+{
+ printk(KERN_EMERG "Nokia n810 battery management fatal fault: %s\n", message);
+ printk(KERN_EMERG "n810 battery management fatal fault: %s\n", message);
+ /* Force a hard shutdown. */
+ machine_power_off();
+ panic("n810bm: Failed to halt machine in emergency state\n");
@ -230,50 +237,33 @@
+static enum n810bm_capacity n810bm_read_batt_capacity(struct n810bm *bm)
+{
+ int adc;
+ const unsigned int hyst = 16;
+ const unsigned int hyst = 20;
+
+ adc = retu_adc_average(bm, RETU_ADC_BSI, 5);
+ if (adc < 0)
+ if (adc < 0) {
+ dev_err(&bm->pdev->dev, "Failed to read BSI ADC");
+ return N810BM_CAP_UNKNOWN;
+ }
+
+ if (adc >= 0x3AC - hyst && adc <= 0x3AC + hyst)
+ 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;
+}
+
+struct mv2p {
+ unsigned int mv;
+ unsigned int p;
+};
+
+/* Convert a battery voltage (in mV) to percentage. */
+static unsigned int n810bm_mvolt2percent(unsigned int mv)
+{
+ /* FIXME: Create a correct table. */
+ static const struct mv2p table[] = {
+ { .mv = 4200, .p = 100, },
+ { .mv = 4150, .p = 90, },
+ { .mv = 4100, .p = 80, },
+ { .mv = 4050, .p = 70, },
+ { .mv = 4000, .p = 60, },
+ { .mv = 3950, .p = 50, },
+ { .mv = 3900, .p = 40, },
+ { .mv = 3850, .p = 30, },
+ { .mv = 3800, .p = 20, },
+ { .mv = 3750, .p = 10, },
+ { .mv = 3700, .p = 0, },
+ };
+ const struct mv2p *e;
+ unsigned int i;
+ const unsigned int minv = 3700;
+ const unsigned int maxv = 4150;
+ unsigned int percent;
+
+ for (i = 0; i < ARRAY_SIZE(table); i++) {
+ e = &table[i];
+ if (mv >= e->mv)
+ return e->p;
+ }
+ mv = clamp(mv, minv, maxv);
+ percent = (mv - minv) * 100 / (maxv - minv);
+
+ return 0;
+ return percent;
+}
+
+static void n810bm_check_timer(unsigned long data)
@ -296,6 +286,15 @@
+ return;
+}
+
+static void n810bm_adc_irq_handler(unsigned long data)
+{
+ struct n810bm *bm = (struct n810bm *)data;
+
+ retu_ack_irq(RETU_INT_ADCS);
+ //TODO
+printk("n810bm: ADC timer triggered\n");
+}
+
+static ssize_t n810bm_attr_charge_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
@ -378,6 +377,10 @@
+ err = device_create_file(&pdev->dev, &dev_attr_batt_capacity);
+ if (err)
+ goto err_rem_charge;
+ err = retu_request_irq(RETU_INT_ADCS, n810bm_adc_irq_handler,
+ (unsigned long)bm, "n810bm");
+ if (err)
+ goto err_rem_capa;
+
+ mod_timer(&bm->check_timer, round_jiffies(jiffies + N810BM_CHECK_INTERVAL));
+
@ -385,6 +388,8 @@
+
+ return 0;
+
+err_rem_capa:
+ device_remove_file(&pdev->dev, &dev_attr_batt_capacity);
+err_rem_charge:
+ device_remove_file(&pdev->dev, &dev_attr_batt_charge);
+err_exit:
@ -399,6 +404,7 @@
+{
+ struct n810bm *bm = platform_get_drvdata(pdev);
+
+ retu_free_irq(RETU_INT_ADCS);
+ del_timer_sync(&bm->check_timer);
+ device_remove_file(&pdev->dev, &dev_attr_batt_capacity);
+ device_remove_file(&pdev->dev, &dev_attr_batt_charge);
@ -432,8 +438,8 @@
+MODULE_DESCRIPTION("Nokia n810 battery management");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michael Buesch");
--- linux-2.6.36-rc5.orig/drivers/cbus/retu.c
+++ linux-2.6.36-rc5/drivers/cbus/retu.c
--- linux-2.6.36-rc7.orig/drivers/cbus/retu.c
+++ linux-2.6.36-rc7/drivers/cbus/retu.c
@@ -85,10 +85,10 @@ int retu_read_reg(int reg)
*
* This function writes a value to the specified register
@ -447,9 +453,17 @@
}
void retu_set_clear_reg_bits(int reg, u16 set, u16 clear)
--- linux-2.6.36-rc5.orig/drivers/cbus/retu.h
+++ linux-2.6.36-rc5/drivers/cbus/retu.h
@@ -58,7 +58,7 @@
--- linux-2.6.36-rc7.orig/drivers/cbus/retu.h
+++ linux-2.6.36-rc7/drivers/cbus/retu.h
@@ -39,6 +39,7 @@
#define RETU_REG_CC2 0x0e /* Common control register 2 */
#define RETU_REG_CTRL_CLR 0x0f /* Regulator clear register */
#define RETU_REG_CTRL_SET 0x10 /* Regulator set register */
+#define RETU_REG_UNK1 0x14 /* 0x1000 is set when charger is plugged in */
#define RETU_REG_STATUS 0x16 /* Status register */
#define RETU_REG_WATCHDOG 0x17 /* Watchdog register */
#define RETU_REG_AUDTXR 0x18 /* Audio Codec Tx register */
@@ -58,7 +59,7 @@
#define MAX_RETU_IRQ_HANDLERS 16
int retu_read_reg(int reg);
@ -458,8 +472,8 @@
void retu_set_clear_reg_bits(int reg, u16 set, u16 clear);
int retu_read_adc(int channel);
int retu_request_irq(int id, void *irq_handler, unsigned long arg, char *name);
--- linux-2.6.36-rc5.orig/arch/arm/mach-omap2/board-n8x0.c
+++ linux-2.6.36-rc5/arch/arm/mach-omap2/board-n8x0.c
--- linux-2.6.36-rc7.orig/arch/arm/mach-omap2/board-n8x0.c
+++ linux-2.6.36-rc7/arch/arm/mach-omap2/board-n8x0.c
@@ -906,6 +906,17 @@ static void __init n8x0_gpio_switches_in
ARRAY_SIZE(n8x0_gpio_switches));
}
@ -487,3 +501,139 @@
}
MACHINE_START(NOKIA_N800, "Nokia N800")
--- /dev/null
+++ linux-2.6.36-rc7/drivers/cbus/lipocharge.c
@@ -0,0 +1,63 @@
+/*
+ * Generic LIPO battery charger
+ *
+ * Copyright (c) 2010 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.
+ */
+
+#include "lipocharge.h"
+
+#include <linux/slab.h>
+
+
+static void lipocharge_timer(unsigned long data)
+{
+ struct lipocharge *c = (struct lipocharge *)data;
+
+ spin_lock(&c->lock);
+ //TODO
+ spin_unlock(&c->lock);
+}
+
+struct lipocharge * lipocharge_alloc(gfp_t gfp)
+{
+ struct lipocharge *c;
+
+ c = kzalloc(sizeof(*c), gfp);
+ if (!c)
+ return NULL;
+ spin_lock_init(&c->lock);
+ setup_timer(&c->timer, lipocharge_timer, (unsigned long)c);
+
+ return c;
+}
+
+void lipocharge_free(struct lipocharge *c)
+{
+ kfree(c);
+}
+
+int lipocharge_start(struct lipocharge *c)
+{
+ if (!c->set_current || !c->get_voltage ||
+ !c->finished || !c->emergency)
+ return -EINVAL;
+ if (!c->top_voltage || c->top_voltage > 4200)
+ return -EINVAL;
+ //TODO
+}
+
+void lipocharge_stop(struct lipocharge *c)
+{
+ del_timer_sync(&c->timer);
+ //TODO
+}
--- /dev/null
+++ linux-2.6.36-rc7/drivers/cbus/lipocharge.h
@@ -0,0 +1,50 @@
+#ifndef LIPOCHARGE_H_
+#define LIPOCHARGE_H_
+
+#include <linux/timer.h>
+#include <linux/spinlock.h>
+
+
+#define LIPORATE(a,b) (((a) * 1000) + (b))
+#define LIPORATE_1C LIPORATE(1,0) /* 1C */
+#define LIPORATE_p8C LIPORATE(0,8) /* 0.8C */
+
+/** struct lipocharge - A generic LIPO charger
+ *
+ * @capacity: Battery capacity in mAh.
+ * @rate: Charge rate.
+ * @top_voltage: Fully charged voltage, in mV.
+ *
+ * @set_current: Set the charge current, in mA.
+ * @get_voltage: Get the battery voltage, in mV.
+ *
+ * @emergency: Something went wrong. Force shutdown.
+ *
+ * @priv: opaque pointer.
+ */
+struct lipocharge
+{
+ unsigned int capacity;
+ unsigned int rate;
+ unsigned int top_voltage;
+
+ int (*set_current)(struct lipocharge *c, unsigned int ma);
+ int (*get_voltage)(struct lipocharge *c, unsigned int *mv);
+
+ void (*finished)(struct lipocharge *c);
+ void (*emergency)(struct lipocharge *c);
+
+ void *priv;
+
+ /* internal */
+ spinlock_t lock;
+ struct timer_list timer;
+};
+
+struct lipocharge * lipocharge_alloc(gfp_t gfp);
+void lipocharge_free(struct lipocharge *c);
+
+int lipocharge_start(struct lipocharge *c);
+void lipocharge_stop(struct lipocharge *c);
+
+#endif /* LIPOCHARGE_H_ */
--- linux-2.6.36-rc7.orig/drivers/cbus/tahvo.h
+++ linux-2.6.36-rc7/drivers/cbus/tahvo.h
@@ -30,8 +30,14 @@
#define TAHVO_REG_IDR 0x01 /* Interrupt ID */
#define TAHVO_REG_IDSR 0x02 /* Interrupt status */
#define TAHVO_REG_IMR 0x03 /* Interrupt mask */
+#define TAHVO_REG_CHGCURR 0x04 /* Charge current control (8-bit) */
#define TAHVO_REG_LEDPWMR 0x05 /* LED PWM */
#define TAHVO_REG_USBR 0x06 /* USB control */
+#define TAHVO_REG_CHGCTL 0x08 /* Charge control register */
+#define TAHVO_REG_CHGCTL_EN 0x0001 /* Global charge enable */
+#define TAHVO_REG_CHGCTL2 0x0c /* Charge control register 2 */
+#define TAHVO_REG_BATCURR 0x0d /* Battery (dis)charge current (signed 16-bit) */
+
#define TAHVO_REG_MAX 0x0d
/* Interrupt sources */