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Message-Id: <1348589574-25655-8-git-send-email-mathieu.poirier@linaro.org>
Date: Tue, 25 Sep 2012 10:12:04 -0600
From: mathieu.poirier@...aro.org
To: linux-kernel@...r.kernel.org, cbou@...l.ru, dwmw2@...radead.org
Cc: mathieu.poirier@...aro.org
Subject: [PATCH 07/57] power: ab8500_bm: Detect removed charger
From: Jonas Aaberg <jonas.aberg@...ricsson.com>
Signed-off-by: Jonas Aaberg <jonas.aberg@...ricsson.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
drivers/power/ab8500_charger.c | 122 +++++++++++++++++++++++++++++++++++++++-
1 files changed, 121 insertions(+), 1 deletions(-)
diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index a7d0c3a..f7bba07 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -66,6 +66,11 @@
#define MAIN_CH_NOK 0x01
#define VBUS_DET 0x80
+#define MAIN_CH_STATUS2_MAINCHGDROP 0x80
+#define MAIN_CH_STATUS2_MAINCHARGERDETDBNC 0x40
+#define USB_CH_VBUSDROP 0x40
+#define USB_CH_VBUSDETDBNC 0x01
+
/* UsbLineStatus register bit masks */
#define AB8500_USB_LINK_STATUS 0x78
#define AB8500_STD_HOST_SUSP 0x18
@@ -80,6 +85,8 @@
/* Step up/down delay in us */
#define STEP_UDELAY 1000
+#define CHARGER_STATUS_POLL 10 /* in ms */
+
/* UsbLineStatus register - usb types */
enum ab8500_charger_link_status {
USB_STAT_NOT_CONFIGURED,
@@ -201,6 +208,10 @@ struct ab8500_charger_usb_state {
* @check_usbchgnotok_work: Work for checking USB charger not ok status
* @kick_wd_work: Work for kicking the charger watchdog in case
* of ABB rev 1.* due to the watchog logic bug
+ * @ac_charger_attached_work: Work for checking if AC charger is still
+ * connected
+ * @usb_charger_attached_work: Work for checking if USB charger is still
+ * connected
* @ac_work: Work for checking AC charger connection
* @detect_usb_type_work: Work for detecting the USB type connected
* @usb_link_status_work: Work for checking the new USB link status
@@ -237,6 +248,8 @@ struct ab8500_charger {
struct delayed_work check_hw_failure_work;
struct delayed_work check_usbchgnotok_work;
struct delayed_work kick_wd_work;
+ struct delayed_work ac_charger_attached_work;
+ struct delayed_work usb_charger_attached_work;
struct work_struct ac_work;
struct work_struct detect_usb_type_work;
struct work_struct usb_link_status_work;
@@ -347,6 +360,15 @@ static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
dev_dbg(di->dev, "USB connected:%i\n", connected);
di->usb.charger_connected = connected;
sysfs_notify(&di->usb_chg.psy.dev->kobj, NULL, "present");
+
+ if (connected) {
+ queue_delayed_work(di->charger_wq,
+ &di->usb_charger_attached_work,
+ HZ);
+ } else {
+ cancel_delayed_work_sync
+ (&di->usb_charger_attached_work);
+ }
}
}
@@ -1703,6 +1725,81 @@ static void ab8500_charger_ac_work(struct work_struct *work)
sysfs_notify(&di->ac_chg.psy.dev->kobj, NULL, "present");
}
+static void ab8500_charger_usb_attached_work(struct work_struct *work)
+{
+ int i;
+ int ret;
+ u8 statval;
+ struct ab8500_charger *di = container_of(work,
+ struct ab8500_charger,
+ usb_charger_attached_work.work);
+
+ for (i = 0 ; i < 10; i++) {
+ ret = abx500_get_register_interruptible(di->dev,
+ AB8500_CHARGER,
+ AB8500_CH_USBCH_STAT1_REG,
+ &statval);
+ if (ret < 0) {
+ dev_err(di->dev, "ab8500 read failed %d\n",
+ __LINE__);
+ goto reschedule;
+ }
+ if ((statval & (USB_CH_VBUSDROP |
+ USB_CH_VBUSDETDBNC)) !=
+ (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC))
+ goto reschedule;
+
+ msleep(CHARGER_STATUS_POLL);
+ }
+
+ (void) ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);
+
+ return;
+reschedule:
+ queue_delayed_work(di->charger_wq,
+ &di->usb_charger_attached_work,
+ HZ);
+}
+
+static void ab8500_charger_ac_attached_work(struct work_struct *work)
+{
+
+ int i;
+ int ret;
+ u8 statval;
+ struct ab8500_charger *di = container_of(work,
+ struct ab8500_charger,
+ ac_charger_attached_work.work);
+
+ for (i = 0 ; i < 10; i++) {
+ ret = abx500_get_register_interruptible(di->dev,
+ AB8500_CHARGER,
+ AB8500_CH_STATUS2_REG,
+ &statval);
+ if (ret < 0) {
+ dev_err(di->dev, "ab8500 read failed %d\n",
+ __LINE__);
+ goto reschedule;
+ }
+ if ((statval & (MAIN_CH_STATUS2_MAINCHGDROP |
+ MAIN_CH_STATUS2_MAINCHARGERDETDBNC)) !=
+ (MAIN_CH_STATUS2_MAINCHGDROP |
+ MAIN_CH_STATUS2_MAINCHARGERDETDBNC))
+ goto reschedule;
+
+ msleep(CHARGER_STATUS_POLL);
+ }
+
+ (void) ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
+ queue_work(di->charger_wq, &di->ac_work);
+
+ return;
+reschedule:
+ queue_delayed_work(di->charger_wq,
+ &di->ac_charger_attached_work,
+ HZ);
+}
+
/**
* ab8500_charger_detect_usb_type_work() - work to detect USB type
* @work: Pointer to the work_struct structure
@@ -1983,6 +2080,8 @@ static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
dev_dbg(di->dev, "Main charger unplugged\n");
queue_work(di->charger_wq, &di->ac_work);
+ cancel_delayed_work_sync(&di->ac_charger_attached_work);
+
return IRQ_HANDLED;
}
@@ -2000,6 +2099,9 @@ static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
dev_dbg(di->dev, "Main charger plugged\n");
queue_work(di->charger_wq, &di->ac_work);
+ queue_delayed_work(di->charger_wq,
+ &di->ac_charger_attached_work,
+ HZ);
return IRQ_HANDLED;
}
@@ -2626,7 +2728,7 @@ static int __devexit ab8500_charger_remove(struct platform_device *pdev)
static int __devinit ab8500_charger_probe(struct platform_device *pdev)
{
- int irq, i, charger_status, ret = 0;
+ int irq, i, charger_status, ret = 0, ch_stat;
struct ab8500_platform_data *plat_data;
struct ab8500_charger *di;
@@ -2713,6 +2815,11 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
INIT_DELAYED_WORK_DEFERRABLE(&di->check_usbchgnotok_work,
ab8500_charger_check_usbchargernotok_work);
+ INIT_DELAYED_WORK(&di->ac_charger_attached_work,
+ ab8500_charger_ac_attached_work);
+ INIT_DELAYED_WORK(&di->usb_charger_attached_work,
+ ab8500_charger_usb_attached_work);
+
/*
* For ABB revision 1.0 and 1.1 there is a bug in the watchdog
* logic. That means we have to continously kick the charger
@@ -2826,6 +2933,19 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, di);
+ ch_stat = ab8500_charger_detect_chargers(di);
+
+ if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) {
+ queue_delayed_work(di->charger_wq,
+ &di->ac_charger_attached_work,
+ HZ);
+ }
+ if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) {
+ queue_delayed_work(di->charger_wq,
+ &di->usb_charger_attached_work,
+ HZ);
+ }
+
return ret;
free_irq:
--
1.7.5.4
--
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