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usb: gadget: dummy_hcd: add 'is_high_speed' parameter

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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@rowland.harvard.edu>
Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Tatyana Brokhman 2011-06-29 16:41:53 +03:00 committed by Greg Kroah-Hartman
parent 1cd8fd2887
commit 7eca4c5a8b
1 changed files with 15 additions and 5 deletions
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20
drivers/usb/gadget/dummy_hcd.c
View File

@ -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;