#include <linux/power_supply.h>
#include <linux/notifier.h>
#include <linux/usb/otg.h>
+#include <linux/ratelimit.h>
+#include <linux/regulator/machine.h>
+#include <linux/leds.h>
#define TWL4030_BCIMSTATEC 0x02
#define TWL4030_BCIICHG 0x08
#define TWL4030_BCIVAC 0x0a
#define TWL4030_BCIVBUS 0x0c
+#define TWL4030_BCIMFSTS3 0x0f
#define TWL4030_BCIMFSTS4 0x10
+#define TWL4030_BCIMFKEY 0x11
#define TWL4030_BCICTL1 0x23
+#define TWL4030_BCIIREF1 0x27
+#define TWL4030_BCIIREF2 0x28
#define TWL4030_BCIAUTOWEN BIT(5)
#define TWL4030_CONFIG_DONE BIT(4)
+#define TWL4030_CVENAC BIT(2)
#define TWL4030_BCIAUTOUSB BIT(1)
#define TWL4030_BCIAUTOAC BIT(0)
#define TWL4030_CGAIN BIT(5)
#define TWL4030_USBFASTMCHG BIT(2)
#define TWL4030_STS_VBUS BIT(7)
#define TWL4030_STS_USB_ID BIT(2)
+#define TWL4030_STS_CHG BIT(1)
/* BCI interrupts */
#define TWL4030_WOVF BIT(0) /* Watchdog overflow */
#define TWL4030_MSTATEC_COMPLETE1 0x0b
#define TWL4030_MSTATEC_COMPLETE4 0x0e
+#define TWL4030_KEY_IIREF 0xe7
+#define TWL4030_BATSTSMCHG BIT(6)
+
+#define IRQ_CHECK_PERIOD (3 * HZ)
+#define IRQ_CHECK_THRESHOLD 4
+
static bool allow_usb = 1;
module_param(allow_usb, bool, 0644);
MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current");
struct work_struct work;
int irq_chg;
int irq_bci;
+ bool ac_charge_enable;
+ bool usb_charge_enable;
+ int usb_current;
+ int ac_current;
+ enum power_supply_type current_supply;
+ struct regulator *usb_reg;
+ int usb_enabled;
+ int irq_had_charger;
+
+ unsigned long irq_check_count_time;
+ int irq_check_count;
+ int irq_check_ac_disabled;
+
+ struct led_trigger *charging_any_trig;
+ int was_charging_any;
unsigned long event;
+ struct ratelimit_state ratelimit;
};
/*
return twl_i2c_read_u8(TWL4030_MODULE_MAIN_CHARGE, val, reg);
}
+static int twl4030_bci_write(u8 reg, u8 val)
+{
+ return twl_i2c_write_u8(TWL4030_MODULE_MAIN_CHARGE, val, reg);
+}
+
static int twl4030_clear_set_boot_bci(u8 clear, u8 set)
{
- return twl4030_clear_set(TWL4030_MODULE_PM_MASTER, 0,
+ return twl4030_clear_set(TWL4030_MODULE_PM_MASTER, clear,
TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set,
TWL4030_PM_MASTER_BOOT_BCI);
}
}
/*
- * Enable/Disable USB Charge funtionality.
+ * Enable/Disable USB Charge functionality.
*/
static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
{
int ret;
if (enable) {
+ if (!bci->usb_charge_enable)
+ return -EACCES;
+
/* Check for USB charger conneted */
if (!twl4030_bci_have_vbus(bci))
return -ENODEV;
return -EACCES;
}
+ /* Need to keep regulator on */
+ if (!bci->usb_enabled &&
+ bci->usb_reg &&
+ regulator_enable(bci->usb_reg) == 0)
+ bci->usb_enabled = 1;
+
/* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
if (ret < 0)
TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
} else {
ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
+ if (bci->usb_enabled &&
+ regulator_disable(bci->usb_reg) == 0)
+ bci->usb_enabled = 0;
}
return ret;
return ret;
}
+static int set_charge_current(struct twl4030_bci *bci, int new_current)
+{
+ u8 val, boot_bci_prev, cgain_set, cgain_clear;
+ int ret, ret2;
+
+ ret = twl4030_bci_read(TWL4030_BCIMFSTS3, &val);
+ if (ret)
+ goto out_norestore;
+
+ if (!(val & TWL4030_BATSTSMCHG)) {
+ dev_err(bci->dev, "missing battery, can't change charge_current\n");
+ goto out_norestore;
+ }
+
+ ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci_prev,
+ TWL4030_PM_MASTER_BOOT_BCI);
+ if (ret)
+ goto out_norestore;
+
+ /*
+ * Stop automatic charging here, because charge current change
+ * requires multiple register writes and CGAIN change requires
+ * automatic charge to be stopped (and CV mode disabled too).
+ */
+ ret = twl4030_clear_set_boot_bci(
+ TWL4030_CVENAC | TWL4030_BCIAUTOAC | TWL4030_BCIAUTOUSB, 0);
+ if (ret)
+ goto out;
+
+ ret = twl4030_bci_write(TWL4030_BCIMFKEY, TWL4030_KEY_IIREF);
+ if (ret)
+ goto out;
+
+ ret = twl4030_bci_write(TWL4030_BCIIREF1, new_current & 0xff);
+ if (ret)
+ goto out;
+
+ ret = twl4030_bci_write(TWL4030_BCIMFKEY, TWL4030_KEY_IIREF);
+ if (ret)
+ goto out;
+
+ ret = twl4030_bci_write(TWL4030_BCIIREF2, (new_current >> 8) & 0x1);
+ if (ret)
+ goto out;
+
+ /* Set CGAIN = 0 or 1 */
+ if (new_current > 511) {
+ cgain_set = TWL4030_CGAIN;
+ cgain_clear = 0;
+ } else {
+ cgain_set = 0;
+ cgain_clear = TWL4030_CGAIN;
+ }
+
+ ret = twl4030_clear_set(TWL4030_MODULE_MAIN_CHARGE,
+ cgain_clear, cgain_set, TWL4030_BCICTL1);
+ if (ret)
+ goto out;
+
+ ret = twl4030_bci_read(TWL4030_BCICTL1, &val);
+ if (ret != 0 || (val & TWL4030_CGAIN) != cgain_set) {
+ dev_err(bci->dev, "CGAIN change failed\n");
+ goto out;
+ }
+
+out:
+ ret2 = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, boot_bci_prev,
+ TWL4030_PM_MASTER_BOOT_BCI);
+ if (ret2 != 0)
+ dev_err(bci->dev, "failed boot_bci restore: %d\n", ret2);
+
+out_norestore:
+ if (ret != 0)
+ dev_err(bci->dev, "charge current change failed: %d\n", ret);
+
+ return ret;
+}
+
/*
* TWL4030 CHG_PRES (AC charger presence) events
*/
static irqreturn_t twl4030_charger_interrupt(int irq, void *arg)
{
struct twl4030_bci *bci = arg;
+ int have_charger;
+ u8 hw_cond;
+ int ret;
+
+ ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &hw_cond,
+ TWL4030_PM_MASTER_STS_HW_CONDITIONS);
+ if (ret < 0) {
+ dev_err(bci->dev, "HW_CONDITIONS read failed: %d\n", ret);
+ goto out;
+ }
+
+ have_charger = (hw_cond & TWL4030_STS_CHG) ? 1 : 0;
+ if (have_charger == bci->irq_had_charger)
+ goto out;
+ bci->irq_had_charger = have_charger;
+
+ dev_dbg(bci->dev, "CHG_PRES irq, hw_cond %02x\n", hw_cond);
+
+ /*
+ * deal with rare mysterious issue of CHG_PRES changing states at ~4Hz
+ * without any charger connected or anything
+ */
+ if (time_before(jiffies, bci->irq_check_count_time + IRQ_CHECK_PERIOD)) {
+ bci->irq_check_count++;
+ if (have_charger && bci->irq_check_count > IRQ_CHECK_THRESHOLD) {
+ dev_err(bci->dev, "spurious CHG_PRES irqs detected (%d), disabling charger\n",
+ bci->irq_check_count);
+ twl4030_charger_enable_ac(false);
+ bci->irq_check_ac_disabled = true;
+ }
+ } else {
+ bci->irq_check_count_time = jiffies;
+ bci->irq_check_count = 1;
+ if (have_charger && bci->irq_check_ac_disabled) {
+ twl4030_charger_enable_ac(true);
+ bci->irq_check_ac_disabled = false;
+ }
+ }
- dev_dbg(bci->dev, "CHG_PRES irq\n");
power_supply_changed(&bci->ac);
power_supply_changed(&bci->usb);
+out:
return IRQ_HANDLED;
}
}
/* various monitoring events, for now we just log them here */
- if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1))
+ if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1) &&
+ __ratelimit(&bci->ratelimit))
dev_warn(bci->dev, "battery temperature out of range\n");
- if (irqs1 & TWL4030_BATSTS)
+ if (irqs1 & TWL4030_BATSTS && __ratelimit(&bci->ratelimit))
dev_crit(bci->dev, "battery disconnected\n");
- if (irqs2 & TWL4030_VBATOV)
+ if (irqs2 & TWL4030_VBATOV && __ratelimit(&bci->ratelimit))
dev_crit(bci->dev, "VBAT overvoltage\n");
- if (irqs2 & TWL4030_VBUSOV)
+ if (irqs2 & TWL4030_VBUSOV && __ratelimit(&bci->ratelimit))
dev_crit(bci->dev, "VBUS overvoltage\n");
- if (irqs2 & TWL4030_ACCHGOV)
+ if (irqs2 & TWL4030_ACCHGOV && __ratelimit(&bci->ratelimit))
dev_crit(bci->dev, "Ac charger overvoltage\n");
+#if 0
+ /* ack the interrupts */
+ twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, irqs1,
+ TWL4030_INTERRUPTS_BCIISR1A);
+ twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, irqs2,
+ TWL4030_INTERRUPTS_BCIISR2A);
+#endif
+
return IRQ_HANDLED;
}
return ret;
}
+static ssize_t twl4030_bci_ac_show_enable(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u8 boot_bci;
+ int ret;
+
+ ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci,
+ TWL4030_PM_MASTER_BOOT_BCI);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%d\n", (boot_bci & TWL4030_BCIAUTOAC) ? 1 : 0);
+}
+
+static ssize_t twl4030_bci_ac_store_enable(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct twl4030_bci *bci = container_of(psy, struct twl4030_bci, ac);
+ unsigned long enable;
+ int ret;
+
+ ret = strict_strtoul(buf, 10, &enable);
+ if (ret || enable > 1)
+ return -EINVAL;
+
+ bci->ac_charge_enable = enable;
+ twl4030_charger_enable_ac(enable);
+
+ return count;
+}
+static struct device_attribute dev_attr_enable_ac =
+ __ATTR(enable, S_IRUGO | S_IWUSR, twl4030_bci_ac_show_enable,
+ twl4030_bci_ac_store_enable);
+
+static ssize_t twl4030_bci_usb_show_enable(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u8 boot_bci;
+ int ret;
+
+ ret = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &boot_bci,
+ TWL4030_PM_MASTER_BOOT_BCI);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%d\n", (boot_bci & TWL4030_BCIAUTOUSB) ? 1 : 0);
+}
+
+static ssize_t twl4030_bci_usb_store_enable(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct twl4030_bci *bci = container_of(psy, struct twl4030_bci, usb);
+ unsigned long enable;
+ int ret;
+
+ ret = strict_strtoul(buf, 10, &enable);
+ if (ret || enable > 1)
+ return -EINVAL;
+
+ bci->usb_charge_enable = enable;
+ twl4030_charger_enable_usb(bci, enable);
+
+ return count;
+}
+static struct device_attribute dev_attr_enable_usb =
+ __ATTR(enable, S_IRUGO | S_IWUSR, twl4030_bci_usb_show_enable,
+ twl4030_bci_usb_store_enable);
+
+static ssize_t show_charge_current(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int ret, val;
+ u8 ctl;
+
+ val = twl4030bci_read_adc_val(TWL4030_BCIIREF1);
+ if (val < 0)
+ return val;
+ ret = twl4030_bci_read(TWL4030_BCICTL1, &ctl);
+ if (ret < 0)
+ return ret;
+
+ val &= 0x1ff;
+ if (ctl & TWL4030_CGAIN)
+ val |= 0x200;
+
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t store_charge_current(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
+ unsigned long new_current;
+ int ret;
+
+ ret = strict_strtoul(buf, 10, &new_current);
+ if (ret)
+ return -EINVAL;
+
+ ret = set_charge_current(bci, new_current);
+ if (ret)
+ return ret;
+
+ if (psy->type == POWER_SUPPLY_TYPE_MAINS)
+ bci->ac_current = new_current;
+ else
+ bci->usb_current = new_current;
+
+ return count;
+}
+static DEVICE_ATTR(charge_current, S_IRUGO | S_IWUSR, show_charge_current,
+ store_charge_current);
+
+static struct attribute *bci_ac_attrs[] = {
+ &dev_attr_enable_ac.attr,
+ &dev_attr_charge_current.attr,
+ NULL,
+};
+
+static struct attribute *bci_usb_attrs[] = {
+ &dev_attr_enable_usb.attr,
+ &dev_attr_charge_current.attr,
+ NULL,
+};
+
+static const struct attribute_group bci_ac_attr_group = {
+ .attrs = bci_ac_attrs,
+};
+
+static const struct attribute_group bci_usb_attr_group = {
+ .attrs = bci_usb_attrs,
+};
+
/*
* Returns the main charge FSM state
* Or < 0 on failure.
union power_supply_propval *val)
{
struct twl4030_bci *bci = dev_get_drvdata(psy->dev->parent);
- int is_charging;
+ int is_charging_any = 0;
+ int is_charging = 0;
int state;
int ret;
if (state < 0)
return state;
- if (psy->type == POWER_SUPPLY_TYPE_USB)
- is_charging = state & TWL4030_MSTATEC_USB;
- else
- is_charging = state & TWL4030_MSTATEC_AC;
+ if (twl4030_bci_state_to_status(state) ==
+ POWER_SUPPLY_STATUS_CHARGING) {
+ is_charging_any =
+ state & (TWL4030_MSTATEC_USB | TWL4030_MSTATEC_AC);
+ if (psy->type == POWER_SUPPLY_TYPE_USB)
+ is_charging = state & TWL4030_MSTATEC_USB;
+ else
+ is_charging = state & TWL4030_MSTATEC_AC;
+ }
+
+ if (is_charging_any != bci->was_charging_any) {
+ led_trigger_event(bci->charging_any_trig,
+ is_charging_any ? LED_FULL : LED_OFF);
+ bci->was_charging_any = is_charging_any;
+ }
+
+ if (is_charging && psy->type != bci->current_supply) {
+ if (psy->type == POWER_SUPPLY_TYPE_USB)
+ set_charge_current(bci, bci->usb_current);
+ else
+ set_charge_current(bci, bci->ac_current);
+ bci->current_supply = psy->type;
+ }
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
static int __init twl4030_bci_probe(struct platform_device *pdev)
{
+ const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
struct twl4030_bci *bci;
int ret;
u32 reg;
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "No platform data\n");
+ return -EINVAL;
+ }
+
bci = kzalloc(sizeof(*bci), GFP_KERNEL);
if (bci == NULL)
return -ENOMEM;
bci->dev = &pdev->dev;
bci->irq_chg = platform_get_irq(pdev, 0);
bci->irq_bci = platform_get_irq(pdev, 1);
+ bci->ac_current = 860; /* ~1.2A */
+ bci->usb_current = 330; /* ~560mA */
+ bci->irq_had_charger = -1;
+ bci->irq_check_count_time = jiffies;
platform_set_drvdata(pdev, bci);
+ ratelimit_state_init(&bci->ratelimit, HZ, 2);
+
+ led_trigger_register_simple("twl4030_bci-charging",
+ &bci->charging_any_trig);
+
bci->ac.name = "twl4030_ac";
bci->ac.type = POWER_SUPPLY_TYPE_MAINS;
bci->ac.properties = twl4030_charger_props;
bci->ac.num_properties = ARRAY_SIZE(twl4030_charger_props);
bci->ac.get_property = twl4030_bci_get_property;
+ bci->ac.supplied_to = pdata->supplied_to;
+ bci->ac.num_supplicants = pdata->num_supplicants;
ret = power_supply_register(&pdev->dev, &bci->ac);
if (ret) {
bci->usb.properties = twl4030_charger_props;
bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
bci->usb.get_property = twl4030_bci_get_property;
+ bci->usb.supplied_to = pdata->supplied_to;
+ bci->usb.num_supplicants = pdata->num_supplicants;
+
+ bci->usb_reg = regulator_get(bci->dev, "bci3v1");
+ if (IS_ERR(bci->usb_reg)) {
+ dev_warn(&pdev->dev, "regulator get bci3v1 failed\n");
+ bci->usb_reg = NULL;
+ }
ret = power_supply_register(&pdev->dev, &bci->usb);
if (ret) {
otg_register_notifier(bci->transceiver, &bci->otg_nb);
}
+ ret = sysfs_create_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to create sysfs group: %d\n", ret);
+ goto fail_sysfs1;
+ }
+
+ ret = sysfs_create_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to create sysfs group: %d\n", ret);
+ goto fail_sysfs2;
+ }
+
/* Enable interrupts now. */
reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 |
TWL4030_TBATOR1 | TWL4030_BATSTS);
if (ret < 0)
dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret);
+ bci->ac_charge_enable = true;
+ bci->usb_charge_enable = true;
twl4030_charger_enable_ac(true);
twl4030_charger_enable_usb(bci, true);
return 0;
fail_unmask_interrupts:
+ sysfs_remove_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
+fail_sysfs2:
+ sysfs_remove_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
+fail_sysfs1:
if (bci->transceiver != NULL) {
otg_unregister_notifier(bci->transceiver, &bci->otg_nb);
otg_put_transceiver(bci->transceiver);
power_supply_unregister(&bci->usb);
fail_register_usb:
power_supply_unregister(&bci->ac);
+
+ if (bci->usb_reg) {
+ if (bci->usb_enabled)
+ regulator_disable(bci->usb_reg);
+ regulator_put(bci->usb_reg);
+ }
+
fail_register_ac:
+ led_trigger_unregister_simple(bci->charging_any_trig);
platform_set_drvdata(pdev, NULL);
kfree(bci);
{
struct twl4030_bci *bci = platform_get_drvdata(pdev);
+ sysfs_remove_group(&bci->usb.dev->kobj, &bci_usb_attr_group);
+ sysfs_remove_group(&bci->ac.dev->kobj, &bci_ac_attr_group);
+
twl4030_charger_enable_ac(false);
twl4030_charger_enable_usb(bci, false);
free_irq(bci->irq_chg, bci);
power_supply_unregister(&bci->usb);
power_supply_unregister(&bci->ac);
+
+ if (bci->usb_reg) {
+ if (bci->usb_enabled)
+ regulator_disable(bci->usb_reg);
+ regulator_put(bci->usb_reg);
+ }
+
+ led_trigger_unregister_simple(bci->charging_any_trig);
platform_set_drvdata(pdev, NULL);
kfree(bci);
git.openpandora.org / pandora-kernel.git / blobdiff