power_supply: PCF50633 battery charger driver
authorBalaji Rao <balajirrao@openmoko.org>
Fri, 9 Jan 2009 00:50:55 +0000 (01:50 +0100)
committerSamuel Ortiz <samuel@sortiz.org>
Sun, 11 Jan 2009 00:34:24 +0000 (01:34 +0100)
Signed-off-by: Balaji Rao <balajirrao@openmoko.org>
Cc: Andy Green <andy@openmoko.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
drivers/power/Kconfig
drivers/power/Makefile
drivers/power/pcf50633-charger.c [new file with mode: 0644]
include/linux/mfd/pcf50633/mbc.h [new file with mode: 0644]

index 6684724..33da112 100644 (file)
@@ -82,4 +82,10 @@ config BATTERY_DA9030
          Say Y here to enable support for batteries charger integrated into
          DA9030 PMIC.
 
+config CHARGER_PCF50633
+       tristate "NXP PCF50633 MBC"
+       depends on MFD_PCF50633
+       help
+        Say Y to include support for NXP PCF50633 Main Battery Charger.
+
 endif # POWER_SUPPLY
index eebb155..2fcf41d 100644 (file)
@@ -25,3 +25,4 @@ obj-$(CONFIG_BATTERY_TOSA)    += tosa_battery.o
 obj-$(CONFIG_BATTERY_WM97XX)   += wm97xx_battery.o
 obj-$(CONFIG_BATTERY_BQ27x00)  += bq27x00_battery.o
 obj-$(CONFIG_BATTERY_DA9030)   += da9030_battery.o
+obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
\ No newline at end of file
diff --git a/drivers/power/pcf50633-charger.c b/drivers/power/pcf50633-charger.c
new file mode 100644 (file)
index 0000000..e988ec1
--- /dev/null
@@ -0,0 +1,358 @@
+/* NXP PCF50633 Main Battery Charger Driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ * Broken down from monstrous PCF50633 driver mainly by
+ * Harald Welte, Andy Green and Werner Almesberger
+ *
+ *  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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/sysfs.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#include <linux/mfd/pcf50633/core.h>
+#include <linux/mfd/pcf50633/mbc.h>
+
+struct pcf50633_mbc {
+       struct pcf50633 *pcf;
+
+       int adapter_active;
+       int adapter_online;
+       int usb_active;
+       int usb_online;
+
+       struct power_supply usb;
+       struct power_supply adapter;
+};
+
+int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
+{
+       struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
+       int ret = 0;
+       u8 bits;
+
+       if (ma >= 1000)
+               bits = PCF50633_MBCC7_USB_1000mA;
+       else if (ma >= 500)
+               bits = PCF50633_MBCC7_USB_500mA;
+       else if (ma >= 100)
+               bits = PCF50633_MBCC7_USB_100mA;
+       else
+               bits = PCF50633_MBCC7_USB_SUSPEND;
+
+       ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
+                                       PCF50633_MBCC7_USB_MASK, bits);
+       if (ret)
+               dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma);
+       else
+               dev_info(pcf->dev, "usb curlim to %d mA\n", ma);
+
+       power_supply_changed(&mbc->usb);
+
+       return ret;
+}
+EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);
+
+int pcf50633_mbc_get_status(struct pcf50633 *pcf)
+{
+       struct pcf50633_mbc *mbc  = platform_get_drvdata(pcf->mbc_pdev);
+       int status = 0;
+
+       if (mbc->usb_online)
+               status |= PCF50633_MBC_USB_ONLINE;
+       if (mbc->usb_active)
+               status |= PCF50633_MBC_USB_ACTIVE;
+       if (mbc->adapter_online)
+               status |= PCF50633_MBC_ADAPTER_ONLINE;
+       if (mbc->adapter_active)
+               status |= PCF50633_MBC_ADAPTER_ACTIVE;
+
+       return status;
+}
+EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
+
+void pcf50633_mbc_set_status(struct pcf50633 *pcf, int what, int status)
+{
+       struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
+
+       if (what & PCF50633_MBC_USB_ONLINE)
+               mbc->usb_online = !!status;
+       if (what & PCF50633_MBC_USB_ACTIVE)
+               mbc->usb_active = !!status;
+       if (what & PCF50633_MBC_ADAPTER_ONLINE)
+               mbc->adapter_online = !!status;
+       if (what & PCF50633_MBC_ADAPTER_ACTIVE)
+               mbc->adapter_active = !!status;
+}
+EXPORT_SYMBOL_GPL(pcf50633_mbc_set_status);
+
+static ssize_t
+show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)
+{
+       struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
+
+       u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
+       u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
+
+       return sprintf(buf, "%d\n", chgmod);
+}
+static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);
+
+static ssize_t
+show_usblim(struct device *dev, struct device_attribute *attr, char *buf)
+{
+       struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
+       u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
+                                               PCF50633_MBCC7_USB_MASK;
+       unsigned int ma;
+
+       if (usblim == PCF50633_MBCC7_USB_1000mA)
+               ma = 1000;
+       else if (usblim == PCF50633_MBCC7_USB_500mA)
+               ma = 500;
+       else if (usblim == PCF50633_MBCC7_USB_100mA)
+               ma = 100;
+       else
+               ma = 0;
+
+       return sprintf(buf, "%u\n", ma);
+}
+
+static ssize_t set_usblim(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t count)
+{
+       struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
+       unsigned long ma;
+       int ret;
+
+       ret = strict_strtoul(buf, 10, &ma);
+       if (ret)
+               return -EINVAL;
+
+       pcf50633_mbc_usb_curlim_set(mbc->pcf, ma);
+
+       return count;
+}
+
+static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim);
+
+static struct attribute *pcf50633_mbc_sysfs_entries[] = {
+       &dev_attr_chgmode.attr,
+       &dev_attr_usb_curlim.attr,
+       NULL,
+};
+
+static struct attribute_group mbc_attr_group = {
+       .name   = NULL,                 /* put in device directory */
+       .attrs  = pcf50633_mbc_sysfs_entries,
+};
+
+static void
+pcf50633_mbc_irq_handler(int irq, void *data)
+{
+       struct pcf50633_mbc *mbc = data;
+
+       /* USB */
+       if (irq == PCF50633_IRQ_USBINS) {
+               mbc->usb_online = 1;
+       } else if (irq == PCF50633_IRQ_USBREM) {
+               mbc->usb_online = 0;
+               mbc->usb_active = 0;
+               pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
+       }
+
+       /* Adapter */
+       if (irq == PCF50633_IRQ_ADPINS) {
+               mbc->adapter_online = 1;
+               mbc->adapter_active = 1;
+       } else if (irq == PCF50633_IRQ_ADPREM) {
+               mbc->adapter_online = 0;
+               mbc->adapter_active = 0;
+       }
+
+       if (irq == PCF50633_IRQ_BATFULL) {
+               mbc->usb_active = 0;
+               mbc->adapter_active = 0;
+       }
+
+       power_supply_changed(&mbc->usb);
+       power_supply_changed(&mbc->adapter);
+
+       if (mbc->pcf->pdata->mbc_event_callback)
+               mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq);
+}
+
+static int adapter_get_property(struct power_supply *psy,
+                       enum power_supply_property psp,
+                       union power_supply_propval *val)
+{
+       struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
+       int ret = 0;
+
+       switch (psp) {
+       case POWER_SUPPLY_PROP_ONLINE:
+               val->intval =  mbc->adapter_online;
+               break;
+       default:
+               ret = -EINVAL;
+               break;
+       }
+       return ret;
+}
+
+static int usb_get_property(struct power_supply *psy,
+                       enum power_supply_property psp,
+                       union power_supply_propval *val)
+{
+       struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
+       int ret = 0;
+
+       switch (psp) {
+       case POWER_SUPPLY_PROP_ONLINE:
+               val->intval = mbc->usb_online;
+               break;
+       default:
+               ret = -EINVAL;
+               break;
+       }
+       return ret;
+}
+
+static enum power_supply_property power_props[] = {
+       POWER_SUPPLY_PROP_ONLINE,
+};
+
+static const u8 mbc_irq_handlers[] = {
+       PCF50633_IRQ_ADPINS,
+       PCF50633_IRQ_ADPREM,
+       PCF50633_IRQ_USBINS,
+       PCF50633_IRQ_USBREM,
+       PCF50633_IRQ_BATFULL,
+       PCF50633_IRQ_CHGHALT,
+       PCF50633_IRQ_THLIMON,
+       PCF50633_IRQ_THLIMOFF,
+       PCF50633_IRQ_USBLIMON,
+       PCF50633_IRQ_USBLIMOFF,
+       PCF50633_IRQ_LOWSYS,
+       PCF50633_IRQ_LOWBAT,
+};
+
+static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)
+{
+       struct pcf50633_mbc *mbc;
+       struct pcf50633_subdev_pdata *pdata = pdev->dev.platform_data;
+       int ret;
+       int i;
+       u8 mbcs1;
+
+       mbc = kzalloc(sizeof(*mbc), GFP_KERNEL);
+       if (!mbc)
+               return -ENOMEM;
+
+       platform_set_drvdata(pdev, mbc);
+       mbc->pcf = pdata->pcf;
+
+       /* Set up IRQ handlers */
+       for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
+               pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i],
+                                       pcf50633_mbc_irq_handler, mbc);
+
+       /* Create power supplies */
+       mbc->adapter.name               = "adapter";
+       mbc->adapter.type               = POWER_SUPPLY_TYPE_MAINS;
+       mbc->adapter.properties         = power_props;
+       mbc->adapter.num_properties     = ARRAY_SIZE(power_props);
+       mbc->adapter.get_property       = &adapter_get_property;
+       mbc->adapter.supplied_to        = mbc->pcf->pdata->batteries;
+       mbc->adapter.num_supplicants    = mbc->pcf->pdata->num_batteries;
+
+       mbc->usb.name                   = "usb";
+       mbc->usb.type                   = POWER_SUPPLY_TYPE_USB;
+       mbc->usb.properties             = power_props;
+       mbc->usb.num_properties         = ARRAY_SIZE(power_props);
+       mbc->usb.get_property           = usb_get_property;
+       mbc->usb.supplied_to            = mbc->pcf->pdata->batteries;
+       mbc->usb.num_supplicants        = mbc->pcf->pdata->num_batteries;
+
+       ret = power_supply_register(&pdev->dev, &mbc->adapter);
+       if (ret) {
+               dev_err(mbc->pcf->dev, "failed to register adapter\n");
+               kfree(mbc);
+               return ret;
+       }
+
+       ret = power_supply_register(&pdev->dev, &mbc->usb);
+       if (ret) {
+               dev_err(mbc->pcf->dev, "failed to register usb\n");
+               power_supply_unregister(&mbc->adapter);
+               kfree(mbc);
+               return ret;
+       }
+
+       ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
+       if (ret)
+               dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");
+
+       mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);
+       if (mbcs1 & PCF50633_MBCS1_USBPRES)
+               pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc);
+       if (mbcs1 & PCF50633_MBCS1_ADAPTPRES)
+               pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc);
+
+       return 0;
+}
+
+static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)
+{
+       struct pcf50633_mbc *mbc = platform_get_drvdata(pdev);
+       int i;
+
+       /* Remove IRQ handlers */
+       for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
+               pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);
+
+       power_supply_unregister(&mbc->usb);
+       power_supply_unregister(&mbc->adapter);
+
+       kfree(mbc);
+
+       return 0;
+}
+
+static struct platform_driver pcf50633_mbc_driver = {
+       .driver = {
+               .name = "pcf50633-mbc",
+       },
+       .probe = pcf50633_mbc_probe,
+       .remove = __devexit_p(pcf50633_mbc_remove),
+};
+
+static int __init pcf50633_mbc_init(void)
+{
+       return platform_driver_register(&pcf50633_mbc_driver);
+}
+module_init(pcf50633_mbc_init);
+
+static void __exit pcf50633_mbc_exit(void)
+{
+       platform_driver_unregister(&pcf50633_mbc_driver);
+}
+module_exit(pcf50633_mbc_exit);
+
+MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
+MODULE_DESCRIPTION("PCF50633 mbc driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcf50633-mbc");
diff --git a/include/linux/mfd/pcf50633/mbc.h b/include/linux/mfd/pcf50633/mbc.h
new file mode 100644 (file)
index 0000000..6e17619
--- /dev/null
@@ -0,0 +1,134 @@
+/*
+ * mbc.h  -- Driver for NXP PCF50633 Main Battery Charger
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+#ifndef __LINUX_MFD_PCF50633_MBC_H
+#define __LINUX_MFD_PCF50633_MBC_H
+
+#include <linux/mfd/pcf50633/core.h>
+#include <linux/platform_device.h>
+
+#define PCF50633_REG_MBCC1     0x43
+#define PCF50633_REG_MBCC2     0x44
+#define PCF50633_REG_MBCC3     0x45
+#define PCF50633_REG_MBCC4     0x46
+#define PCF50633_REG_MBCC5     0x47
+#define PCF50633_REG_MBCC6     0x48
+#define PCF50633_REG_MBCC7     0x49
+#define PCF50633_REG_MBCC8     0x4a
+#define PCF50633_REG_MBCS1     0x4b
+#define PCF50633_REG_MBCS2     0x4c
+#define PCF50633_REG_MBCS3     0x4d
+
+enum pcf50633_reg_mbcc1 {
+       PCF50633_MBCC1_CHGENA           = 0x01, /* Charger enable */
+       PCF50633_MBCC1_AUTOSTOP         = 0x02,
+       PCF50633_MBCC1_AUTORES          = 0x04, /* automatic resume */
+       PCF50633_MBCC1_RESUME           = 0x08, /* explicit resume cmd */
+       PCF50633_MBCC1_RESTART          = 0x10, /* restart charging */
+       PCF50633_MBCC1_PREWDTIME_60M    = 0x20, /* max. precharging time */
+       PCF50633_MBCC1_WDTIME_1H        = 0x00,
+       PCF50633_MBCC1_WDTIME_2H        = 0x40,
+       PCF50633_MBCC1_WDTIME_4H        = 0x80,
+       PCF50633_MBCC1_WDTIME_6H        = 0xc0,
+};
+#define PCF50633_MBCC1_WDTIME_MASK       0xc0
+
+enum pcf50633_reg_mbcc2 {
+       PCF50633_MBCC2_VBATCOND_2V7     = 0x00,
+       PCF50633_MBCC2_VBATCOND_2V85    = 0x01,
+       PCF50633_MBCC2_VBATCOND_3V0     = 0x02,
+       PCF50633_MBCC2_VBATCOND_3V15    = 0x03,
+       PCF50633_MBCC2_VMAX_4V          = 0x00,
+       PCF50633_MBCC2_VMAX_4V20        = 0x28,
+       PCF50633_MBCC2_VRESDEBTIME_64S  = 0x80, /* debounce time (32/64sec) */
+};
+
+enum pcf50633_reg_mbcc7 {
+       PCF50633_MBCC7_USB_100mA        = 0x00,
+       PCF50633_MBCC7_USB_500mA        = 0x01,
+       PCF50633_MBCC7_USB_1000mA       = 0x02,
+       PCF50633_MBCC7_USB_SUSPEND      = 0x03,
+       PCF50633_MBCC7_BATTEMP_EN       = 0x04,
+       PCF50633_MBCC7_BATSYSIMAX_1A6   = 0x00,
+       PCF50633_MBCC7_BATSYSIMAX_1A8   = 0x40,
+       PCF50633_MBCC7_BATSYSIMAX_2A0   = 0x80,
+       PCF50633_MBCC7_BATSYSIMAX_2A2   = 0xc0,
+};
+#define PCF50633_MBCC7_USB_MASK 0x03
+
+enum pcf50633_reg_mbcc8 {
+       PCF50633_MBCC8_USBENASUS        = 0x10,
+};
+
+enum pcf50633_reg_mbcs1 {
+       PCF50633_MBCS1_USBPRES          = 0x01,
+       PCF50633_MBCS1_USBOK            = 0x02,
+       PCF50633_MBCS1_ADAPTPRES        = 0x04,
+       PCF50633_MBCS1_ADAPTOK          = 0x08,
+       PCF50633_MBCS1_TBAT_OK          = 0x00,
+       PCF50633_MBCS1_TBAT_ABOVE       = 0x10,
+       PCF50633_MBCS1_TBAT_BELOW       = 0x20,
+       PCF50633_MBCS1_TBAT_UNDEF       = 0x30,
+       PCF50633_MBCS1_PREWDTEXP        = 0x40,
+       PCF50633_MBCS1_WDTEXP           = 0x80,
+};
+
+enum pcf50633_reg_mbcs2_mbcmod {
+       PCF50633_MBCS2_MBC_PLAY         = 0x00,
+       PCF50633_MBCS2_MBC_USB_PRE      = 0x01,
+       PCF50633_MBCS2_MBC_USB_PRE_WAIT = 0x02,
+       PCF50633_MBCS2_MBC_USB_FAST     = 0x03,
+       PCF50633_MBCS2_MBC_USB_FAST_WAIT = 0x04,
+       PCF50633_MBCS2_MBC_USB_SUSPEND  = 0x05,
+       PCF50633_MBCS2_MBC_ADP_PRE      = 0x06,
+       PCF50633_MBCS2_MBC_ADP_PRE_WAIT = 0x07,
+       PCF50633_MBCS2_MBC_ADP_FAST     = 0x08,
+       PCF50633_MBCS2_MBC_ADP_FAST_WAIT = 0x09,
+       PCF50633_MBCS2_MBC_BAT_FULL     = 0x0a,
+       PCF50633_MBCS2_MBC_HALT         = 0x0b,
+};
+#define PCF50633_MBCS2_MBC_MASK                0x0f
+enum pcf50633_reg_mbcs2_chgstat {
+       PCF50633_MBCS2_CHGS_NONE        = 0x00,
+       PCF50633_MBCS2_CHGS_ADAPTER     = 0x10,
+       PCF50633_MBCS2_CHGS_USB         = 0x20,
+       PCF50633_MBCS2_CHGS_BOTH        = 0x30,
+};
+#define PCF50633_MBCS2_RESSTAT_AUTO    0x40
+
+enum pcf50633_reg_mbcs3 {
+       PCF50633_MBCS3_USBLIM_PLAY      = 0x01,
+       PCF50633_MBCS3_USBLIM_CGH       = 0x02,
+       PCF50633_MBCS3_TLIM_PLAY        = 0x04,
+       PCF50633_MBCS3_TLIM_CHG         = 0x08,
+       PCF50633_MBCS3_ILIM             = 0x10, /* 1: Ibat > Icutoff */
+       PCF50633_MBCS3_VLIM             = 0x20, /* 1: Vbat == Vmax */
+       PCF50633_MBCS3_VBATSTAT         = 0x40, /* 1: Vbat > Vbatcond */
+       PCF50633_MBCS3_VRES             = 0x80, /* 1: Vbat > Vth(RES) */
+};
+
+#define PCF50633_MBCC2_VBATCOND_MASK     0x03
+#define PCF50633_MBCC2_VMAX_MASK         0x3c
+
+/* Charger status */
+#define PCF50633_MBC_USB_ONLINE                0x01
+#define PCF50633_MBC_USB_ACTIVE                0x02
+#define PCF50633_MBC_ADAPTER_ONLINE    0x04
+#define PCF50633_MBC_ADAPTER_ACTIVE    0x08
+
+int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma);
+
+int pcf50633_mbc_get_status(struct pcf50633 *);
+void pcf50633_mbc_set_status(struct pcf50633 *, int what, int status);
+
+#endif
+