From 36ed03f7796a6695ee1b6c4893ef022328a50e70 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Mon, 9 Sep 2013 16:48:29 +0800 Subject: [PATCH] usb: gadget: zero: Add flexible auto remote wakeup test method In order to increase test coverage, we can change the interval between two remote wakeups every time, and the interval can be any user defined value. This change will no affect current behavior if the user does not use two introduced module paramters. Signed-off-by: Peter Chen Signed-off-by: Felipe Balbi --- drivers/usb/gadget/zero.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c index 0deb9d6..0dd07ae 100644 --- a/drivers/usb/gadget/zero.c +++ b/drivers/usb/gadget/zero.c @@ -95,6 +95,18 @@ unsigned autoresume = DEFAULT_AUTORESUME; module_param(autoresume, uint, S_IRUGO); MODULE_PARM_DESC(autoresume, "zero, or seconds before remote wakeup"); +/* Maximum Autoresume time */ +unsigned max_autoresume; +module_param(max_autoresume, uint, S_IRUGO); +MODULE_PARM_DESC(max_autoresume, "maximum seconds before remote wakeup"); + +/* Interval between two remote wakeups */ +unsigned autoresume_interval_ms; +module_param(autoresume_interval_ms, uint, S_IRUGO); +MODULE_PARM_DESC(autoresume_interval_ms, + "milliseconds to increase successive wakeup delays"); + +static unsigned autoresume_step_ms; /*-------------------------------------------------------------------------*/ static struct usb_device_descriptor device_desc = { @@ -183,8 +195,16 @@ static void zero_suspend(struct usb_composite_dev *cdev) return; if (autoresume) { - mod_timer(&autoresume_timer, jiffies + (HZ * autoresume)); - DBG(cdev, "suspend, wakeup in %d seconds\n", autoresume); + if (max_autoresume && + (autoresume_step_ms > max_autoresume * 1000)) + autoresume_step_ms = autoresume * 1000; + + mod_timer(&autoresume_timer, jiffies + + msecs_to_jiffies(autoresume_step_ms)); + DBG(cdev, "suspend, wakeup in %d milliseconds\n", + autoresume_step_ms); + + autoresume_step_ms += autoresume_interval_ms; } else DBG(cdev, "%s\n", __func__); } @@ -316,6 +336,7 @@ static int __init zero_bind(struct usb_composite_dev *cdev) if (autoresume) { sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; loopback_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; + autoresume_step_ms = autoresume * 1000; } /* support OTG systems */ -- 2.7.4