diff options
Diffstat (limited to 'drivers/usb/gadget/zero.c')
| -rw-r--r-- | drivers/usb/gadget/zero.c | 47 |
1 files changed, 37 insertions, 10 deletions
diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c index 685fa681cb6..134f354ede6 100644 --- a/drivers/usb/gadget/zero.c +++ b/drivers/usb/gadget/zero.c @@ -64,10 +64,10 @@ static bool loopdefault = 0; module_param(loopdefault, bool, S_IRUGO|S_IWUSR); static struct usb_zero_options gzero_options = { - .isoc_interval = 4, - .isoc_maxpacket = 1024, - .bulk_buflen = 4096, - .qlen = 32, + .isoc_interval = GZERO_ISOC_INTERVAL, + .isoc_maxpacket = GZERO_ISOC_MAXPACKET, + .bulk_buflen = GZERO_BULK_BUFLEN, + .qlen = GZERO_QLEN, }; /*-------------------------------------------------------------------------*/ @@ -91,10 +91,22 @@ static struct usb_zero_options gzero_options = { * functional coverage for the "USBCV" test harness from USB-IF. * It's always set if OTG mode is enabled. */ -unsigned autoresume = DEFAULT_AUTORESUME; +static unsigned autoresume = DEFAULT_AUTORESUME; module_param(autoresume, uint, S_IRUGO); MODULE_PARM_DESC(autoresume, "zero, or seconds before remote wakeup"); +/* Maximum Autoresume time */ +static 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 */ +static 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__); } @@ -280,16 +300,20 @@ static int __init zero_bind(struct usb_composite_dev *cdev) ss_opts->isoc_interval = gzero_options.isoc_interval; ss_opts->isoc_maxpacket = gzero_options.isoc_maxpacket; ss_opts->isoc_mult = gzero_options.isoc_mult; - ss_opts->isoc_maxburst = gzero_options.isoc_maxpacket; + ss_opts->isoc_maxburst = gzero_options.isoc_maxburst; ss_opts->bulk_buflen = gzero_options.bulk_buflen; func_ss = usb_get_function(func_inst_ss); - if (IS_ERR(func_ss)) + if (IS_ERR(func_ss)) { + status = PTR_ERR(func_ss); goto err_put_func_inst_ss; + } func_inst_lb = usb_get_function_instance("Loopback"); - if (IS_ERR(func_inst_lb)) + if (IS_ERR(func_inst_lb)) { + status = PTR_ERR(func_inst_lb); goto err_put_func_ss; + } lb_opts = container_of(func_inst_lb, struct f_lb_opts, func_inst); lb_opts->bulk_buflen = gzero_options.bulk_buflen; @@ -312,6 +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 */ @@ -368,8 +393,10 @@ static int zero_unbind(struct usb_composite_dev *cdev) del_timer_sync(&autoresume_timer); if (!IS_ERR_OR_NULL(func_ss)) usb_put_function(func_ss); + usb_put_function_instance(func_inst_ss); if (!IS_ERR_OR_NULL(func_lb)) usb_put_function(func_lb); + usb_put_function_instance(func_inst_lb); return 0; } |