Provide Host PC (after configured), Wall charger notifications. Typically Battery/Charger driver is subscribed to these notifications and responsible for notifying user space and drawing the current. This patch was originally developed by Google and is available at http://android.git.kernel.org/?p=kernel/experimental.git. CC: Mike Lockwood <lockwood@xxxxxxxxxxx> CC: Brian Swetland <swetland@xxxxxxxxxx> Signed-off-by: Pavankumar Kondeti <pkondeti@xxxxxxxxxxxxxx> --- drivers/usb/gadget/msm72k_udc.c | 16 ++++++++++++++++ include/linux/usb/msm_hsusb.h | 8 ++++++++ 2 files changed, 24 insertions(+), 0 deletions(-) diff --git a/drivers/usb/gadget/msm72k_udc.c b/drivers/usb/gadget/msm72k_udc.c index dadb7c2..e048b6a 100644 --- a/drivers/usb/gadget/msm72k_udc.c +++ b/drivers/usb/gadget/msm72k_udc.c @@ -155,6 +155,9 @@ struct usb_info { void (*phy_reset)(void); void (*hw_reset)(bool en); + /* for notification when USB is connected or disconnected */ + void (*usb_connected)(int); + struct work_struct work; struct usb_gadget gadget; @@ -664,6 +667,8 @@ static void handle_setup(struct usb_info *ui) if (ctl.bRequestType == (USB_DIR_OUT | USB_TYPE_STANDARD)) { if (ctl.bRequest == USB_REQ_SET_CONFIGURATION) { ui->online = !!ctl.wValue; + if (ui->online && ui->usb_connected) + ui->usb_connected(USB_CHG_HOST); } else if (ctl.bRequest == USB_REQ_SET_ADDRESS) { /* write address delayed (will take effect ** after the next IN txn) @@ -1193,6 +1198,9 @@ static void usb_do_work(struct work_struct *w) msm72k_pullup(&ui->gadget, 0); spin_unlock_irqrestore(&ui->lock, iflags); + if (ui->usb_connected) + ui->usb_connected(USB_CHG_NONE); + /* terminate any transactions, etc */ flush_all_endpoints(ui); @@ -1231,6 +1239,13 @@ static void usb_do_work(struct work_struct *w) clk_enable(ui->pclk); usb_reset(ui); + /* detect shorted D+/D-, indicating AC power */ + usleep_range(10000, 12000); + if ((readl(USB_PORTSC) & PORTSC_LS) == + PORTSC_LS) + if (ui->usb_connected) + ui->usb_connected(USB_CHG_WALL); + ui->state = USB_STATE_ONLINE; usb_do_work_check_vbus(ui); } @@ -1660,6 +1675,7 @@ static int msm72k_probe(struct platform_device *pdev) struct msm_hsusb_platform_data *pdata = pdev->dev.platform_data; ui->phy_reset = pdata->phy_reset; ui->phy_init_seq = pdata->phy_init_seq; + ui->usb_connected = pdata->usb_connected; } irq = platform_get_irq(pdev, 0); diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h index 534db4e..4d75a3d 100644 --- a/include/linux/usb/msm_hsusb.h +++ b/include/linux/usb/msm_hsusb.h @@ -19,6 +19,11 @@ #include <linux/types.h> +/* USB charger types */ +#define USB_CHG_NONE 0 +#define USB_CHG_HOST 1 +#define USB_CHG_WALL 2 + /* platform device data for msm_hsusb driver */ struct msm_hsusb_platform_data { @@ -28,6 +33,9 @@ struct msm_hsusb_platform_data { /* (de)assert the reset to the usb core */ void (*hw_reset)(bool enable); + /* for notification when USB is connected or disconnected */ + void (*usb_connected)(int); + /* val, reg pairs terminated by -1 */ int *phy_init_seq; }; -- 1.7.1 -- Sent by a consultant of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
