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USB: otg: twl4030: add support for notifier 

it's expected that the transceiver driver will
initialize and call the notifier chain when
necessary. Implement that for twl4030-usb driver.

Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Felipe Balbi 2009-12-17 13:01:37 +02:00 committed by Greg Kroah-Hartman
parent e9a20171df
commit d1b5b5c0a8
1 changed files with 14 additions and 21 deletions
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35
drivers/usb/otg/twl4030-usb.c
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@ -36,7 +36,7 @@
#include <linux/i2c/twl.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <linux/notifier.h>
/* Register defines */
@ -236,15 +236,6 @@
#define PMBR1 0x0D
#define GPIO_USB_4PIN_ULPI_2430C (3 << 0)
enum linkstat {
USB_LINK_UNKNOWN = 0,
USB_LINK_NONE,
USB_LINK_VBUS,
USB_LINK_ID,
};
struct twl4030_usb {
struct otg_transceiver otg;
struct device *dev;
@ -347,10 +338,10 @@ twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
/*-------------------------------------------------------------------------*/
static enum linkstat twl4030_usb_linkstat(struct twl4030_usb *twl)
static enum usb_xceiv_events twl4030_usb_linkstat(struct twl4030_usb *twl)
{
int status;
int linkstat = USB_LINK_UNKNOWN;
int linkstat = USB_EVENT_NONE;
/*
* For ID/VBUS sensing, see manual section 15.4.8 ...
@ -368,11 +359,11 @@ static enum linkstat twl4030_usb_linkstat(struct twl4030_usb *twl)
dev_err(twl->dev, "USB link status err %d\n", status);
else if (status & (BIT(7) | BIT(2))) {
if (status & BIT(2))
linkstat = USB_LINK_ID;
linkstat = USB_EVENT_ID;
else
linkstat = USB_LINK_VBUS;
linkstat = USB_EVENT_VBUS;
} else
linkstat = USB_LINK_NONE;
linkstat = USB_EVENT_NONE;
dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
status, status, linkstat);
@ -383,7 +374,7 @@ static enum linkstat twl4030_usb_linkstat(struct twl4030_usb *twl)
spin_lock_irq(&twl->lock);
twl->linkstat = linkstat;
if (linkstat == USB_LINK_ID) {
if (linkstat == USB_EVENT_ID) {
twl->otg.default_a = true;
twl->otg.state = OTG_STATE_A_IDLE;
} else {
@ -564,7 +555,7 @@ static ssize_t twl4030_usb_vbus_show(struct device *dev,
spin_lock_irqsave(&twl->lock, flags);
ret = sprintf(buf, "%s\n",
(twl->linkstat == USB_LINK_VBUS) ? "on" : "off");
(twl->linkstat == USB_EVENT_VBUS) ? "on" : "off");
spin_unlock_irqrestore(&twl->lock, flags);
return ret;
@ -585,8 +576,7 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
#endif
status = twl4030_usb_linkstat(twl);
if (status != USB_LINK_UNKNOWN) {
if (status >= 0) {
/* FIXME add a set_power() method so that B-devices can
* configure the charger appropriately. It's not always
* correct to consume VBUS power, and how much current to
@ -598,12 +588,13 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
* USB_LINK_VBUS state. musb_hdrc won't care until it
* starts to handle softconnect right.
*/
if (status == USB_LINK_NONE)
if (status == USB_EVENT_NONE)
twl4030_phy_suspend(twl, 0);
else
twl4030_phy_resume(twl);
twl4030charger_usb_en(status == USB_LINK_VBUS);
blocking_notifier_call_chain(&twl->otg.notifier, status,
twl->otg.gadget);
}
sysfs_notify(&twl->dev->kobj, NULL, "vbus");
@ -693,6 +684,8 @@ static int __devinit twl4030_usb_probe(struct platform_device *pdev)
if (device_create_file(&pdev->dev, &dev_attr_vbus))
dev_warn(&pdev->dev, "could not create sysfs file\n");
BLOCKING_INIT_NOTIFIER_HEAD(&twl->otg.notifier);
/* Our job is to use irqs and status from the power module
* to keep the transceiver disabled when nothing's connected.
*