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Date: Fri, 27 Nov 2015 11:59:20 +0100
From: Robert Baldyga <r.baldyga@...sung.com>
To: balbi@...com
Cc: gregkh@...uxfoundation.org, andrzej.p@...sung.com,
m.szyprowski@...sung.com, b.zolnierkie@...sung.com,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
Robert Baldyga <r.baldyga@...sung.com>
Subject: [PATCH v2 26/29] usb: gadget: f_eem: conversion to new API
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@...sung.com>
---
drivers/usb/gadget/function/f_eem.c | 154 ++++++++----------------------------
1 file changed, 33 insertions(+), 121 deletions(-)
diff --git a/drivers/usb/gadget/function/f_eem.c b/drivers/usb/gadget/function/f_eem.c
index cad35a5..8896419 100644
--- a/drivers/usb/gadget/function/f_eem.c
+++ b/drivers/usb/gadget/function/f_eem.c
@@ -73,14 +73,6 @@ static struct usb_endpoint_descriptor eem_fs_out_desc = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};
-static struct usb_descriptor_header *eem_fs_function[] = {
- /* CDC EEM control descriptors */
- (struct usb_descriptor_header *) &eem_intf,
- (struct usb_descriptor_header *) &eem_fs_in_desc,
- (struct usb_descriptor_header *) &eem_fs_out_desc,
- NULL,
-};
-
/* high speed support: */
static struct usb_endpoint_descriptor eem_hs_in_desc = {
@@ -101,14 +93,6 @@ static struct usb_endpoint_descriptor eem_hs_out_desc = {
.wMaxPacketSize = cpu_to_le16(512),
};
-static struct usb_descriptor_header *eem_hs_function[] = {
- /* CDC EEM control descriptors */
- (struct usb_descriptor_header *) &eem_intf,
- (struct usb_descriptor_header *) &eem_hs_in_desc,
- (struct usb_descriptor_header *) &eem_hs_out_desc,
- NULL,
-};
-
/* super speed support: */
static struct usb_endpoint_descriptor eem_ss_in_desc = {
@@ -138,15 +122,16 @@ static struct usb_ss_ep_comp_descriptor eem_ss_bulk_comp_desc = {
/* .bmAttributes = 0, */
};
-static struct usb_descriptor_header *eem_ss_function[] = {
- /* CDC EEM control descriptors */
- (struct usb_descriptor_header *) &eem_intf,
- (struct usb_descriptor_header *) &eem_ss_in_desc,
- (struct usb_descriptor_header *) &eem_ss_bulk_comp_desc,
- (struct usb_descriptor_header *) &eem_ss_out_desc,
- (struct usb_descriptor_header *) &eem_ss_bulk_comp_desc,
- NULL,
-};
+USB_COMPOSITE_ENDPOINT(ep_in, &eem_fs_in_desc, &eem_hs_in_desc,
+ &eem_ss_in_desc, &eem_ss_bulk_comp_desc);
+USB_COMPOSITE_ENDPOINT(ep_out, &eem_fs_out_desc, &eem_hs_out_desc,
+ &eem_ss_out_desc, &eem_ss_bulk_comp_desc);
+
+USB_COMPOSITE_ALTSETTING(intf0alt0, &eem_intf, &ep_in, &ep_out);
+
+USB_COMPOSITE_INTERFACE(intf0, &intf0alt0);
+
+USB_COMPOSITE_DESCRIPTORS(eem_descs, &intf0);
/* string descriptors: */
@@ -190,65 +175,46 @@ static int eem_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 (alt != 0)
- goto fail;
-
- if (intf == eem->ctrl_id) {
- DBG(cdev, "reset eem\n");
- gether_disconnect(&eem->port);
-
- if (!eem->port.in_ep->desc || !eem->port.out_ep->desc) {
- DBG(cdev, "init eem\n");
- if (config_ep_by_speed(cdev->gadget, f,
- eem->port.in_ep) ||
- config_ep_by_speed(cdev->gadget, f,
- eem->port.out_ep)) {
- eem->port.in_ep->desc = NULL;
- eem->port.out_ep->desc = NULL;
- goto fail;
- }
- }
+ eem->port.in_ep = usb_function_get_ep(f, intf, 0);
+ if (!eem->port.in_ep)
+ return -ENODEV;
- /* zlps should not occur because zero-length EEM packets
- * will be inserted in those cases where they would occur
- */
- eem->port.is_zlp_ok = 1;
- eem->port.cdc_filter = DEFAULT_FILTER;
- DBG(cdev, "activate eem\n");
- net = gether_connect(&eem->port);
- if (IS_ERR(net))
- return PTR_ERR(net);
- } else
- goto fail;
+ eem->port.out_ep = usb_function_get_ep(f, intf, 1);
+ if (!eem->port.out_ep)
+ return -ENODEV;
+
+ /* zlps should not occur because zero-length EEM packets
+ * will be inserted in those cases where they would occur
+ */
+ eem->port.is_zlp_ok = 1;
+ eem->port.cdc_filter = DEFAULT_FILTER;
+ DBG(cdev, "activate eem\n");
+ net = gether_connect(&eem->port);
+ if (IS_ERR(net))
+ return PTR_ERR(net);
return 0;
-fail:
- return -EINVAL;
}
-static void eem_disable(struct usb_function *f)
+static void eem_clear_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct f_eem *eem = func_to_eem(f);
struct usb_composite_dev *cdev = f->config->cdev;
DBG(cdev, "eem deactivated\n");
- if (eem->port.in_ep->enabled)
- gether_disconnect(&eem->port);
+ gether_disconnect(&eem->port);
}
/*-------------------------------------------------------------------------*/
/* EEM function driver setup/binding */
-static int eem_bind(struct usb_configuration *c, struct usb_function *f)
+static int eem_prep_descs(struct usb_function *f)
{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_eem *eem = func_to_eem(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
struct usb_string *us;
int status;
- struct usb_ep *ep;
struct f_eem_opts *eem_opts;
@@ -276,53 +242,7 @@ static int eem_bind(struct usb_configuration *c, struct usb_function *f)
return PTR_ERR(us);
eem_intf.iInterface = us[0].id;
- /* allocate instance-specific interface IDs */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- eem->ctrl_id = status;
- eem_intf.bInterfaceNumber = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &eem_fs_in_desc);
- if (!ep)
- goto fail;
- eem->port.in_ep = ep;
-
- ep = usb_ep_autoconfig(cdev->gadget, &eem_fs_out_desc);
- if (!ep)
- goto fail;
- eem->port.out_ep = ep;
-
- status = -ENOMEM;
-
- /* support all relevant hardware speeds... we expect that when
- * hardware is dual speed, all bulk-capable endpoints work at
- * both speeds
- */
- eem_hs_in_desc.bEndpointAddress = eem_fs_in_desc.bEndpointAddress;
- eem_hs_out_desc.bEndpointAddress = eem_fs_out_desc.bEndpointAddress;
-
- eem_ss_in_desc.bEndpointAddress = eem_fs_in_desc.bEndpointAddress;
- eem_ss_out_desc.bEndpointAddress = eem_fs_out_desc.bEndpointAddress;
-
- status = usb_assign_descriptors(f, eem_fs_function, eem_hs_function,
- eem_ss_function);
- if (status)
- goto fail;
-
- DBG(cdev, "CDC Ethernet (EEM): %s speed IN/%s OUT/%s\n",
- gadget_is_superspeed(c->cdev->gadget) ? "super" :
- gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
- eem->port.in_ep->name, eem->port.out_ep->name);
- return 0;
-
-fail:
- ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
-
- return status;
+ return usb_function_set_descs(f, &eem_descs);
}
static void eem_cmd_complete(struct usb_ep *ep, struct usb_request *req)
@@ -604,13 +524,6 @@ static void eem_free(struct usb_function *f)
mutex_unlock(&opts->lock);
}
-static void eem_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- DBG(c->cdev, "eem unbind\n");
-
- usb_free_all_descriptors(f);
-}
-
static struct usb_function *eem_alloc(struct usb_function_instance *fi)
{
struct f_eem *eem;
@@ -631,11 +544,10 @@ static struct usb_function *eem_alloc(struct usb_function_instance *fi)
eem->port.func.name = "cdc_eem";
/* descriptors are per-instance copies */
- eem->port.func.bind = eem_bind;
- eem->port.func.unbind = eem_unbind;
+ eem->port.func.prep_descs = eem_prep_descs;
eem->port.func.set_alt = eem_set_alt;
+ eem->port.func.clear_alt = eem_clear_alt;
eem->port.func.setup = eem_setup;
- eem->port.func.disable = eem_disable;
eem->port.func.free_func = eem_free;
eem->port.wrap = eem_wrap;
eem->port.unwrap = eem_unwrap;
--
1.9.1
--
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