Generate descriptors in new format and attach them to USB function in
prep_descs(). Implement prep_vendor_descs() to supply class specific
descriptors. Change set_alt() implementation and implement clear_alt()
operation. Remove boilerplate code.
Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
---
drivers/usb/gadget/function/f_subset.c | 165 ++++++++++-----------------------
1 file changed, 47 insertions(+), 118 deletions(-)
diff --git a/drivers/usb/gadget/function/f_subset.c b/drivers/usb/gadget/function/f_subset.c
index 829c78d..98324ca 100644
--- a/drivers/usb/gadget/function/f_subset.c
+++ b/drivers/usb/gadget/function/f_subset.c
@@ -154,17 +154,6 @@ static struct usb_endpoint_descriptor fs_subset_out_desc = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};
-static struct usb_descriptor_header *fs_eth_function[] = {
- (struct usb_descriptor_header *) &subset_data_intf,
- (struct usb_descriptor_header *) &mdlm_header_desc,
- (struct usb_descriptor_header *) &mdlm_desc,
- (struct usb_descriptor_header *) &mdlm_detail_desc,
- (struct usb_descriptor_header *) ðer_desc,
- (struct usb_descriptor_header *) &fs_subset_in_desc,
- (struct usb_descriptor_header *) &fs_subset_out_desc,
- NULL,
-};
-
/* high speed support: */
static struct usb_endpoint_descriptor hs_subset_in_desc = {
@@ -183,17 +172,6 @@ static struct usb_endpoint_descriptor hs_subset_out_desc = {
.wMaxPacketSize = cpu_to_le16(512),
};
-static struct usb_descriptor_header *hs_eth_function[] = {
- (struct usb_descriptor_header *) &subset_data_intf,
- (struct usb_descriptor_header *) &mdlm_header_desc,
- (struct usb_descriptor_header *) &mdlm_desc,
- (struct usb_descriptor_header *) &mdlm_detail_desc,
- (struct usb_descriptor_header *) ðer_desc,
- (struct usb_descriptor_header *) &hs_subset_in_desc,
- (struct usb_descriptor_header *) &hs_subset_out_desc,
- NULL,
-};
-
/* super speed support: */
static struct usb_endpoint_descriptor ss_subset_in_desc = {
@@ -221,18 +199,16 @@ static struct usb_ss_ep_comp_descriptor ss_subset_bulk_comp_desc = {
/* .bmAttributes = 0, */
};
-static struct usb_descriptor_header *ss_eth_function[] = {
- (struct usb_descriptor_header *) &subset_data_intf,
- (struct usb_descriptor_header *) &mdlm_header_desc,
- (struct usb_descriptor_header *) &mdlm_desc,
- (struct usb_descriptor_header *) &mdlm_detail_desc,
- (struct usb_descriptor_header *) ðer_desc,
- (struct usb_descriptor_header *) &ss_subset_in_desc,
- (struct usb_descriptor_header *) &ss_subset_bulk_comp_desc,
- (struct usb_descriptor_header *) &ss_subset_out_desc,
- (struct usb_descriptor_header *) &ss_subset_bulk_comp_desc,
- NULL,
-};
+USB_COMPOSITE_ENDPOINT(ep_in, &fs_subset_in_desc, &hs_subset_in_desc,
+ &ss_subset_in_desc, &ss_subset_bulk_comp_desc);
+USB_COMPOSITE_ENDPOINT(ep_out, &fs_subset_out_desc, &hs_subset_out_desc,
+ &ss_subset_out_desc, &ss_subset_bulk_comp_desc);
+
+USB_COMPOSITE_ALTSETTING(intf0alt0, &subset_data_intf, &ep_in, &ep_out);
+
+USB_COMPOSITE_INTERFACE(intf0, &intf0alt0);
+
+USB_COMPOSITE_DESCRIPTORS(subset_descs, &intf0);
/* string descriptors: */
@@ -260,26 +236,20 @@ static int geth_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
struct usb_composite_dev *cdev = f->config->cdev;
struct net_device *net;
- /* we know alt == 0, so this is an activation or a reset */
-
- if (geth->port.in_ep->enabled) {
- DBG(cdev, "reset cdc subset\n");
- gether_disconnect(&geth->port);
- }
-
DBG(cdev, "init + activate cdc subset\n");
- if (config_ep_by_speed(cdev->gadget, f, geth->port.in_ep) ||
- config_ep_by_speed(cdev->gadget, f, geth->port.out_ep)) {
- geth->port.in_ep->desc = NULL;
- geth->port.out_ep->desc = NULL;
- return -EINVAL;
- }
+
+ geth->port.in_ep = usb_function_get_ep(f, intf, 0);
+ if (!geth->port.in_ep)
+ return -ENODEV;
+ geth->port.out_ep = usb_function_get_ep(f, intf, 1);
+ if (!geth->port.out_ep)
+ return -ENODEV;
net = gether_connect(&geth->port);
return PTR_ERR_OR_ZERO(net);
}
-static void geth_disable(struct usb_function *f)
+static void geth_clear_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct f_gether *geth = func_to_geth(f);
struct usb_composite_dev *cdev = f->config->cdev;
@@ -292,14 +262,26 @@ static void geth_disable(struct usb_function *f)
/* serial function driver setup/binding */
-static int
-geth_bind(struct usb_configuration *c, struct usb_function *f)
+static int geth_prep_descs(struct usb_function *f)
{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_gether *geth = func_to_geth(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
struct usb_string *us;
+
+ us = usb_gstrings_attach(cdev, geth_strings,
+ ARRAY_SIZE(geth_string_defs));
+ if (IS_ERR(us))
+ return PTR_ERR(us);
+
+ subset_data_intf.iInterface = us[0].id;
+ ether_desc.iMACAddress = us[1].id;
+
+ return usb_function_set_descs(f, &subset_descs);
+}
+
+static int geth_prep_vendor_descs(struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = f->config->cdev;
int status;
- struct usb_ep *ep;
struct f_gether_opts *gether_opts;
@@ -322,63 +304,16 @@ geth_bind(struct usb_configuration *c, struct usb_function *f)
gether_opts->bound = true;
}
- us = usb_gstrings_attach(cdev, geth_strings,
- ARRAY_SIZE(geth_string_defs));
- if (IS_ERR(us))
- return PTR_ERR(us);
-
- subset_data_intf.iInterface = us[0].id;
- ether_desc.iMACAddress = us[1].id;
-
- /* allocate instance-specific interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- subset_data_intf.bInterfaceNumber = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &fs_subset_in_desc);
- if (!ep)
- goto fail;
- geth->port.in_ep = ep;
-
- ep = usb_ep_autoconfig(cdev->gadget, &fs_subset_out_desc);
- if (!ep)
- goto fail;
- geth->port.out_ep = ep;
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- hs_subset_in_desc.bEndpointAddress = fs_subset_in_desc.bEndpointAddress;
- hs_subset_out_desc.bEndpointAddress =
- fs_subset_out_desc.bEndpointAddress;
-
- ss_subset_in_desc.bEndpointAddress = fs_subset_in_desc.bEndpointAddress;
- ss_subset_out_desc.bEndpointAddress =
- fs_subset_out_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, fs_eth_function, hs_eth_function,
- ss_eth_function);
- if (status)
- goto fail;
-
- /* NOTE: all that is done without knowing or caring about
- * the network link ... which is unavailable to this code
- * until we're activated via set_alt().
- */
-
- DBG(cdev, "CDC Subset: %s speed IN/%s OUT/%s\n",
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- geth->port.in_ep->name, geth->port.out_ep->name);
- return 0;
+ subset_data_intf.bInterfaceNumber = usb_get_interface_id(f, 0);
-fail:
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)&mdlm_header_desc);
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)&mdlm_desc);
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)&mdlm_detail_desc);
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)ðer_desc);
return status;
}
@@ -460,12 +395,6 @@ static void geth_free(struct usb_function *f)
kfree(eth);
}
-static void geth_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- geth_string_defs[0].id = 0;
- usb_free_all_descriptors(f);
-}
-
static struct usb_function *geth_alloc(struct usb_function_instance *fi)
{
struct f_gether *geth;
@@ -496,10 +425,10 @@ static struct usb_function *geth_alloc(struct usb_function_instance *fi)
geth->port.cdc_filter = DEFAULT_FILTER;
geth->port.func.name = "cdc_subset";
- geth->port.func.bind = geth_bind;
- geth->port.func.unbind = geth_unbind;
+ geth->port.func.prep_descs = geth_prep_descs;
+ geth->port.func.prep_vendor_descs = geth_prep_vendor_descs;
geth->port.func.set_alt = geth_set_alt;
- geth->port.func.disable = geth_disable;
+ geth->port.func.clear_alt = geth_clear_alt;
geth->port.func.free_func = geth_free;
return &geth->port.func;
--
1.9.1
--
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