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USB: gadget: android: Support switching vendor ID when configuration changes

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Based on the list of enabled USB functions, we can now switch the vendor ID
as well as the product ID.

Signed-off-by: Mike Lockwood <lockwood@android.com>
This commit is contained in:
Mike Lockwood
2011-02-09 09:38:26 -05:00
committed by Colin Cross
parent 6bb1acf2eb
commit aecca43f09
2 changed files with 31 additions and 8 deletions
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32
drivers/usb/gadget/android.c
View File

@@ -65,6 +65,7 @@ struct android_dev {
int num_functions;
char **functions;
int vendor_id;
int product_id;
int version;
};
@@ -254,6 +255,22 @@ static int product_matches_functions(struct android_usb_product *p)
return 1;
}
static int get_vendor_id(struct android_dev *dev)
{
struct android_usb_product *p = dev->products;
int count = dev->num_products;
int i;
if (p) {
for (i = 0; i < count; i++, p++) {
if (p->vendor_id && product_matches_functions(p))
return p->vendor_id;
}
}
/* use default vendor ID */
return dev->vendor_id;
}
static int get_product_id(struct android_dev *dev)
{
struct android_usb_product *p = dev->products;
@@ -274,7 +291,7 @@ static int android_bind(struct usb_composite_dev *cdev)
{
struct android_dev *dev = _android_dev;
struct usb_gadget *gadget = cdev->gadget;
int gcnum, id, product_id, ret;
int gcnum, id, ret;
printk(KERN_INFO "android_bind\n");
@@ -324,8 +341,8 @@ static int android_bind(struct usb_composite_dev *cdev)
usb_gadget_set_selfpowered(gadget);
dev->cdev = cdev;
product_id = get_product_id(dev);
device_desc.idProduct = __constant_cpu_to_le16(product_id);
device_desc.idVendor = __constant_cpu_to_le16(get_vendor_id(dev));
device_desc.idProduct = __constant_cpu_to_le16(get_product_id(dev));
cdev->desc.idProduct = device_desc.idProduct;
return 0;
@@ -394,7 +411,6 @@ void android_enable_function(struct usb_function *f, int enable)
{
struct android_dev *dev = _android_dev;
int disable = !enable;
int product_id;
if (!!f->disabled != disable) {
usb_function_set_enabled(f, !disable);
@@ -416,8 +432,8 @@ void android_enable_function(struct usb_function *f, int enable)
update_dev_desc(dev);
product_id = get_product_id(dev);
device_desc.idProduct = __constant_cpu_to_le16(product_id);
device_desc.idVendor = __constant_cpu_to_le16(get_vendor_id(dev));
device_desc.idProduct = __constant_cpu_to_le16(get_product_id(dev));
if (dev->cdev)
dev->cdev->desc.idProduct = device_desc.idProduct;
usb_composite_force_reset(dev->cdev);
@@ -436,9 +452,11 @@ static int android_probe(struct platform_device *pdev)
dev->num_products = pdata->num_products;
dev->functions = pdata->functions;
dev->num_functions = pdata->num_functions;
if (pdata->vendor_id)
if (pdata->vendor_id) {
dev->vendor_id = pdata->vendor_id;
device_desc.idVendor =
__constant_cpu_to_le16(pdata->vendor_id);
}
if (pdata->product_id) {
dev->product_id = pdata->product_id;
device_desc.idProduct =

7
include/linux/usb/android_composite.h
View File

@@ -27,7 +27,12 @@ struct android_usb_function {
};
struct android_usb_product {
/* Default product ID. */
/* Vendor ID for this set of functions.
* Default vendor_id in platform data will be used if this is zero.
*/
__u16 vendor_id;
/* Product ID for this set of functions. */
__u16 product_id;
/* List of function names associated with this product.