From: Tatyana Brokhman <tlinder@xxxxxxxxxxxxxx>
This patch adds a new module parameter to dummy_hcd
called is_high_speed.
When set to false the connected device will be forced
to operate in full-speed mode. By default, this parameter
is set to 'true'.
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Tatyana Brokhman <tlinder@xxxxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/gadget/dummy_hcd.c | 20 +++++++++++++++-----
1 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index a4896df..d040dc4 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -72,13 +72,17 @@ MODULE_LICENSE ("GPL");
struct dummy_hcd_module_parameters {
bool is_super_speed;
+ bool is_high_speed;
};
static struct dummy_hcd_module_parameters mod_data = {
- .is_super_speed = false
+ .is_super_speed = false,
+ .is_high_speed = true,
};
module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO);
MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection");
+module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO);
+MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection");
/*-------------------------------------------------------------------------*/
/* gadget side driver data structres */
@@ -909,12 +913,15 @@ static int dummy_udc_start(struct usb_gadget_driver *driver,
dum->gadget.ep0 = &dum->ep [0].ep;
if (mod_data.is_super_speed)
dum->gadget.speed = driver->speed;
+ else if (mod_data.is_high_speed)
+ dum->gadget.speed = min_t(u8, USB_SPEED_HIGH, driver->speed);
else
- dum->gadget.speed = min((u8)USB_SPEED_HIGH, (u8)driver->speed);
+ dum->gadget.speed = USB_SPEED_FULL;
if (dum->gadget.speed < driver->speed)
- dev_dbg(udc_dev(dum), "This device can perform faster if"
- " you connect it to a "
- "SupeSpeed port...\n");
+ dev_dbg(udc_dev(dum), "This device can perform faster"
+ " if you connect it to a %s port...\n",
+ (driver->speed == USB_SPEED_SUPER ?
+ "SuperSpeed" : "HighSpeed"));
if (dum->gadget.speed == USB_SPEED_SUPER) {
for (i = 0; i < DUMMY_ENDPOINTS; i++)
@@ -2435,6 +2442,9 @@ static int __init init (void)
if (usb_disabled ())
return -ENODEV;
+ if (!mod_data.is_high_speed && mod_data.is_super_speed)
+ return -EINVAL;
+
the_hcd_pdev = platform_device_alloc(driver_name, -1);
if (!the_hcd_pdev)
return retval;
--
1.7.6
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