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usb gadget: USB_GADGET_VBUS_DRAW Kconfig option 

Offer a "how much VBUS power to request" configuration option
for USB gadgets that aren't using board-specific customization
of their gadget or (composite) configuration drivers.

Also remove a couple pointless "depends on USB_GADGET" bits
from the Kconfig text; booleans inside an "if USB_GADGET" will
already have that dependency.

Based on a patch from Justin Clacherty.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Justin Clacherty <justin@redfish-group.com>
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell 2008-09-12 09:39:06 -07:00 committed by Greg Kroah-Hartman
parent 02582b92f6
commit 36e893d25a
10 changed files with 25 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/usb/gadget/Kconfig
View File

@ -45,7 +45,7 @@ if USB_GADGET
config USB_GADGET_DEBUG
boolean "Debugging messages (DEVELOPMENT)"
depends on USB_GADGET && DEBUG_KERNEL
depends on DEBUG_KERNEL
help
Many controller and gadget drivers will print some debugging
messages if you use this option to ask for those messages.
@ -59,7 +59,7 @@ config USB_GADGET_DEBUG
config USB_GADGET_DEBUG_FILES
boolean "Debugging information files (DEVELOPMENT)"
depends on USB_GADGET && PROC_FS
depends on PROC_FS
help
Some of the drivers in the "gadget" framework can expose
debugging information in files such as /proc/driver/udc
@ -70,7 +70,7 @@ config USB_GADGET_DEBUG_FILES
config USB_GADGET_DEBUG_FS
boolean "Debugging information files in debugfs (DEVELOPMENT)"
depends on USB_GADGET && DEBUG_FS
depends on DEBUG_FS
help
Some of the drivers in the "gadget" framework can expose
debugging information in files under /sys/kernel/debug/.
@ -79,6 +79,23 @@ config USB_GADGET_DEBUG_FS
Enable these files by choosing "Y" here. If in doubt, or
to conserve kernel memory, say "N".
config USB_GADGET_VBUS_DRAW
int "Maximum VBUS Power usage (2-500 mA)"
range 2 500
default 2
help
Some devices need to draw power from USB when they are
configured, perhaps to operate circuitry or to recharge
batteries. This is in addition to any local power supply,
such as an AC adapter or batteries.
Enter the maximum power your device draws through USB, in
milliAmperes. The permitted range of values is 2 - 500 mA;
0 mA would be legal, but can make some hosts misbehave.
This value will be used except for system-specific gadget
drivers that have more specific information.
config USB_GADGET_SELECTED
boolean

1
drivers/usb/gadget/cdc2.c
View File

@ -155,7 +155,6 @@ static struct usb_configuration cdc_config_driver = {
.bConfigurationValue = 1,
/* .iConfiguration = DYNAMIC */
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1, /* 2 mA, minimal */
};
/*-------------------------------------------------------------------------*/

4
drivers/usb/gadget/composite.c
View File

@ -245,7 +245,7 @@ static int config_buf(struct usb_configuration *config,
c->bConfigurationValue = config->bConfigurationValue;
c->iConfiguration = config->iConfiguration;
c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes;
c->bMaxPower = config->bMaxPower;
c->bMaxPower = config->bMaxPower ? : (CONFIG_USB_GADGET_VBUS_DRAW / 2);
/* There may be e.g. OTG descriptors */
if (config->descriptors) {
@ -432,7 +432,7 @@ static int set_config(struct usb_composite_dev *cdev,
}
/* when we return, be sure our power usage is valid */
power = 2 * c->bMaxPower;
power = c->bMaxPower ? (2 * c->bMaxPower) : CONFIG_USB_GADGET_VBUS_DRAW;
done:
usb_gadget_vbus_draw(gadget, power);
return result;

2
drivers/usb/gadget/ether.c
View File

@ -242,7 +242,6 @@ static struct usb_configuration rndis_config_driver = {
.bConfigurationValue = 2,
/* .iConfiguration = DYNAMIC */
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1, /* 2 mA, minimal */
};
/*-------------------------------------------------------------------------*/
@ -271,7 +270,6 @@ static struct usb_configuration eth_config_driver = {
.bConfigurationValue = 1,
/* .iConfiguration = DYNAMIC */
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1, /* 2 mA, minimal */
};
/*-------------------------------------------------------------------------*/

1
drivers/usb/gadget/f_loopback.c
View File

@ -352,7 +352,6 @@ static struct usb_configuration loopback_driver = {
.bind = loopback_bind_config,
.bConfigurationValue = 2,
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1, /* 2 mA, minimal */
/* .iConfiguration = DYNAMIC */
};

1
drivers/usb/gadget/f_sourcesink.c
View File

@ -552,7 +552,6 @@ static struct usb_configuration sourcesink_driver = {
.setup = sourcesink_setup,
.bConfigurationValue = 3,
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1, /* 2 mA, minimal */
/* .iConfiguration = DYNAMIC */
};

2
drivers/usb/gadget/file_storage.c
View File

@ -851,7 +851,7 @@ config_desc = {
.bConfigurationValue = CONFIG_VALUE,
.iConfiguration = STRING_CONFIG,
.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1, // self-powered
.bMaxPower = CONFIG_USB_GADGET_VBUS_DRAW / 2,
};
static struct usb_otg_descriptor

2
drivers/usb/gadget/gmidi.c
View File

@ -222,7 +222,7 @@ static struct usb_config_descriptor config_desc = {
* power properties of the device. Is it selfpowered?
*/
.bmAttributes = USB_CONFIG_ATT_ONE,
.bMaxPower = 1,
.bMaxPower = CONFIG_USB_GADGET_VBUS_DRAW / 2,
};
/* B.3.1 Standard AC Interface Descriptor */

3
drivers/usb/gadget/printer.c
View File

@ -252,7 +252,7 @@ static struct usb_config_descriptor config_desc = {
.bConfigurationValue = DEV_CONFIG_VALUE,
.iConfiguration = 0,
.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1 /* Self-Powered */
.bMaxPower = CONFIG_USB_GADGET_VBUS_DRAW / 2,
};
static struct usb_interface_descriptor intf_desc = {
@ -1476,7 +1476,6 @@ printer_bind(struct usb_gadget *gadget)
if (gadget->is_otg) {
otg_desc.bmAttributes |= USB_OTG_HNP,
config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
config_desc.bMaxPower = 4;
}
spin_lock_init(&dev->lock);

1
drivers/usb/gadget/serial.c
View File

@ -159,7 +159,6 @@ static struct usb_configuration serial_config_driver = {
/* .bConfigurationValue = f(use_acm) */
/* .iConfiguration = DYNAMIC */
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1, /* 2 mA, minimal */
};
static int __init gs_bind(struct usb_composite_dev *cdev)