usb: gadget: convert source sink and loopback to new function interface
This patch converts the f_sourcesink and f_loopback file to the USB-function module. Both functions shares a few common utility functions which are currently implemented in g_zero.c itself. This patch moves the common code into the sourcesink file and creates one module out of the the two functions (source sink and loop back). The g_zero gadget is function specific to source sink and loop back to set a few options. This Symbol dependency enforces a modul load right now. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Sebastian Andrzej Siewior
Felipe Balbi
parent
de53c25447
commit
cf9a08ae5a
6 changed files with 321 additions and 154 deletions
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@ -500,6 +500,9 @@ config USB_LIBCOMPOSITE
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tristate
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depends on USB_GADGET
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config USB_F_SS_LB
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tristate
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choice
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tristate "USB Gadget Drivers"
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default USB_ETH
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@ -524,6 +527,7 @@ choice
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config USB_ZERO
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tristate "Gadget Zero (DEVELOPMENT)"
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select USB_LIBCOMPOSITE
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select USB_F_SS_LB
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help
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Gadget Zero is a two-configuration device. It either sinks and
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sources bulk data; or it loops back a configurable number of
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@ -74,3 +74,7 @@ obj-$(CONFIG_USB_G_WEBCAM) += g_webcam.o
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obj-$(CONFIG_USB_G_NCM) += g_ncm.o
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obj-$(CONFIG_USB_G_ACM_MS) += g_acm_ms.o
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obj-$(CONFIG_USB_GADGET_TARGET) += tcm_usb_gadget.o
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# USB Functions
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f_ss_lb-y := f_loopback.o f_sourcesink.o
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obj-$(CONFIG_USB_F_SS_LB) += f_ss_lb.o
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@ -15,10 +15,11 @@
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/usb/composite.h>
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#include "g_zero.h"
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#include "gadget_chips.h"
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/*
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* LOOPBACK FUNCTION ... a testing vehicle for USB peripherals,
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@ -44,9 +45,8 @@ static inline struct f_loopback *func_to_loop(struct usb_function *f)
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return container_of(f, struct f_loopback, function);
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}
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static unsigned qlen = 32;
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module_param(qlen, uint, 0);
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MODULE_PARM_DESC(qlenn, "depth of loopback queue");
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static unsigned qlen;
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static unsigned buflen;
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/*-------------------------------------------------------------------------*/
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@ -171,8 +171,7 @@ static struct usb_gadget_strings *loopback_strings[] = {
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/*-------------------------------------------------------------------------*/
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static int __init
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loopback_bind(struct usb_configuration *c, struct usb_function *f)
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static int loopback_bind(struct usb_configuration *c, struct usb_function *f)
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{
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struct usb_composite_dev *cdev = c->cdev;
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struct f_loopback *loop = func_to_loop(f);
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@ -229,8 +228,7 @@ autoconf_fail:
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return 0;
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}
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static void
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loopback_unbind(struct usb_configuration *c, struct usb_function *f)
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static void lb_free_func(struct usb_function *f)
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{
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usb_free_all_descriptors(f);
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kfree(func_to_loop(f));
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@ -372,25 +370,64 @@ static void loopback_disable(struct usb_function *f)
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disable_loopback(loop);
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}
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/*-------------------------------------------------------------------------*/
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static int __init loopback_bind_config(struct usb_configuration *c)
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static struct usb_function *loopback_alloc(struct usb_function_instance *fi)
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{
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struct f_loopback *loop;
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int status;
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struct f_lb_opts *lb_opts;
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loop = kzalloc(sizeof *loop, GFP_KERNEL);
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if (!loop)
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return -ENOMEM;
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return ERR_PTR(-ENOMEM);
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lb_opts = container_of(fi, struct f_lb_opts, func_inst);
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buflen = lb_opts->bulk_buflen;
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qlen = lb_opts->qlen;
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if (!qlen)
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qlen = 32;
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loop->function.name = "loopback";
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loop->function.bind = loopback_bind;
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loop->function.unbind = loopback_unbind;
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loop->function.set_alt = loopback_set_alt;
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loop->function.disable = loopback_disable;
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loop->function.strings = loopback_strings;
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status = usb_add_function(c, &loop->function);
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if (status)
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kfree(loop);
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return status;
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loop->function.free_func = lb_free_func;
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return &loop->function;
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}
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static void lb_free_instance(struct usb_function_instance *fi)
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{
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struct f_lb_opts *lb_opts;
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lb_opts = container_of(fi, struct f_lb_opts, func_inst);
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kfree(lb_opts);
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}
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static struct usb_function_instance *loopback_alloc_instance(void)
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{
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struct f_lb_opts *lb_opts;
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lb_opts = kzalloc(sizeof(*lb_opts), GFP_KERNEL);
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if (!lb_opts)
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return ERR_PTR(-ENOMEM);
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lb_opts->func_inst.free_func_inst = lb_free_instance;
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return &lb_opts->func_inst;
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}
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DECLARE_USB_FUNCTION(Loopback, loopback_alloc_instance, loopback_alloc);
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int __init lb_modinit(void)
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{
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int ret;
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ret = usb_function_register(&Loopbackusb_func);
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if (ret)
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return ret;
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return ret;
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}
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void __exit lb_modexit(void)
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{
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usb_function_unregister(&Loopbackusb_func);
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}
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MODULE_LICENSE("GPL");
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@ -16,11 +16,12 @@
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/usb/composite.h>
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#include <linux/err.h>
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#include "g_zero.h"
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#include "gadget_chips.h"
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/*
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* SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
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* controller drivers.
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@ -62,24 +63,11 @@ static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
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}
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static unsigned pattern;
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module_param(pattern, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63, 2 = none");
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static unsigned isoc_interval = 4;
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module_param(isoc_interval, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(isoc_interval, "1 - 16");
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static unsigned isoc_maxpacket = 1024;
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module_param(isoc_maxpacket, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(isoc_maxpacket, "0 - 1023 (fs), 0 - 1024 (hs/ss)");
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static unsigned isoc_interval;
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static unsigned isoc_maxpacket;
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static unsigned isoc_mult;
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module_param(isoc_mult, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(isoc_mult, "0 - 2 (hs/ss only)");
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static unsigned isoc_maxburst;
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module_param(isoc_maxburst, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(isoc_maxburst, "0 - 15 (ss only)");
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static unsigned buflen;
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/*-------------------------------------------------------------------------*/
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@ -313,7 +301,57 @@ static struct usb_gadget_strings *sourcesink_strings[] = {
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/*-------------------------------------------------------------------------*/
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static int __init
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struct usb_request *alloc_ep_req(struct usb_ep *ep, int len)
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{
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struct usb_request *req;
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req = usb_ep_alloc_request(ep, GFP_ATOMIC);
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if (req) {
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if (len)
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req->length = len;
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else
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req->length = buflen;
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req->buf = kmalloc(req->length, GFP_ATOMIC);
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if (!req->buf) {
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usb_ep_free_request(ep, req);
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req = NULL;
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}
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}
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return req;
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}
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void free_ep_req(struct usb_ep *ep, struct usb_request *req)
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{
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kfree(req->buf);
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usb_ep_free_request(ep, req);
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}
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static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
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{
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int value;
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if (ep->driver_data) {
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value = usb_ep_disable(ep);
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if (value < 0)
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DBG(cdev, "disable %s --> %d\n",
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ep->name, value);
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ep->driver_data = NULL;
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}
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}
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void disable_endpoints(struct usb_composite_dev *cdev,
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struct usb_ep *in, struct usb_ep *out,
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struct usb_ep *iso_in, struct usb_ep *iso_out)
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{
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disable_ep(cdev, in);
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disable_ep(cdev, out);
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if (iso_in)
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disable_ep(cdev, iso_in);
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if (iso_out)
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disable_ep(cdev, iso_out);
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}
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static int
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sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
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{
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struct usb_composite_dev *cdev = c->cdev;
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@ -328,14 +366,6 @@ sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
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source_sink_intf_alt0.bInterfaceNumber = id;
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source_sink_intf_alt1.bInterfaceNumber = id;
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/* allocate string ID(s) */
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id = usb_string_id(cdev);
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if (id < 0)
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return id;
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strings_sourcesink[0].id = id;
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source_sink_intf_alt0.iInterface = id;
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source_sink_intf_alt1.iInterface = id;
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/* allocate bulk endpoints */
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ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
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if (!ss->in_ep) {
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@ -457,14 +487,11 @@ no_iso:
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return 0;
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}
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static struct usb_function *global_ss_func;
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static void
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sourcesink_unbind(struct usb_configuration *c, struct usb_function *f)
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sourcesink_free_func(struct usb_function *f)
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{
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usb_free_all_descriptors(f);
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kfree(func_to_ss(f));
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global_ss_func = NULL;
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}
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/* optionally require specific source/sink data patterns */
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@ -767,6 +794,7 @@ static void sourcesink_disable(struct usb_function *f)
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}
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/*-------------------------------------------------------------------------*/
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static int sourcesink_setup(struct usb_function *f,
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const struct usb_ctrlrequest *ctrl)
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{
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@ -839,41 +867,76 @@ unknown:
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return value;
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}
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static int __init sourcesink_bind_config(struct usb_configuration *c)
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static struct usb_function *source_sink_alloc_func(
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struct usb_function_instance *fi)
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{
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struct f_sourcesink *ss;
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int status;
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struct f_ss_opts *ss_opts;
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ss = kzalloc(sizeof(*ss), GFP_KERNEL);
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if (!ss)
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return -ENOMEM;
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return NULL;
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global_ss_func = &ss->function;
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ss_opts = container_of(fi, struct f_ss_opts, func_inst);
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pattern = ss_opts->pattern;
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isoc_interval = ss_opts->isoc_interval;
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isoc_maxpacket = ss_opts->isoc_maxpacket;
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isoc_mult = ss_opts->isoc_mult;
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isoc_maxburst = ss_opts->isoc_maxburst;
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buflen = ss_opts->bulk_buflen;
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ss->function.name = "source/sink";
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ss->function.bind = sourcesink_bind;
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ss->function.unbind = sourcesink_unbind;
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ss->function.set_alt = sourcesink_set_alt;
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ss->function.get_alt = sourcesink_get_alt;
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ss->function.disable = sourcesink_disable;
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ss->function.setup = sourcesink_setup;
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ss->function.strings = sourcesink_strings;
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status = usb_add_function(c, &ss->function);
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if (status)
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kfree(ss);
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return status;
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ss->function.free_func = sourcesink_free_func;
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return &ss->function;
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}
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static int ss_config_setup(struct usb_configuration *c,
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const struct usb_ctrlrequest *ctrl)
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static void acm_free_instance(struct usb_function_instance *fi)
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{
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if (!global_ss_func)
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return -EOPNOTSUPP;
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switch (ctrl->bRequest) {
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case 0x5b:
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case 0x5c:
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return global_ss_func->setup(global_ss_func, ctrl);
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default:
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return -EOPNOTSUPP;
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struct f_ss_opts *ss_opts;
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ss_opts = container_of(fi, struct f_ss_opts, func_inst);
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kfree(ss_opts);
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}
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static struct usb_function_instance *source_sink_alloc_inst(void)
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{
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struct f_ss_opts *ss_opts;
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ss_opts = kzalloc(sizeof(*ss_opts), GFP_KERNEL);
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if (!ss_opts)
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return ERR_PTR(-ENOMEM);
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ss_opts->func_inst.free_func_inst = acm_free_instance;
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return &ss_opts->func_inst;
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}
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DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst,
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source_sink_alloc_func);
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static int __init sslb_modinit(void)
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{
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int ret;
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ret = usb_function_register(&SourceSinkusb_func);
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if (ret)
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return ret;
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ret = lb_modinit();
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if (ret)
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usb_function_unregister(&SourceSinkusb_func);
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return ret;
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}
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static void __exit sslb_modexit(void)
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{
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usb_function_unregister(&SourceSinkusb_func);
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lb_modexit();
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}
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module_init(sslb_modinit);
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module_exit(sslb_modexit);
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MODULE_LICENSE("GPL");
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@ -6,11 +6,34 @@
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#ifndef __G_ZERO_H
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#define __G_ZERO_H
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#include <linux/usb/composite.h>
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struct usb_zero_options {
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unsigned pattern;
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unsigned isoc_interval;
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unsigned isoc_maxpacket;
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unsigned isoc_mult;
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unsigned isoc_maxburst;
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unsigned bulk_buflen;
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unsigned qlen;
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};
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/* global state */
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extern unsigned buflen;
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extern const struct usb_descriptor_header *otg_desc[];
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struct f_ss_opts {
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struct usb_function_instance func_inst;
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unsigned pattern;
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unsigned isoc_interval;
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unsigned isoc_maxpacket;
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unsigned isoc_mult;
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unsigned isoc_maxburst;
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unsigned bulk_buflen;
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};
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struct f_lb_opts {
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struct usb_function_instance func_inst;
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unsigned bulk_buflen;
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unsigned qlen;
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};
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void lb_modexit(void);
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int lb_modinit(void);
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/* common utilities */
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struct usb_request *alloc_ep_req(struct usb_ep *ep, int len);
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@ -10,7 +10,6 @@
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* (at your option) any later version.
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*/
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/*
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* Gadget Zero only needs two bulk endpoints, and is an example of how you
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* can write a hardware-agnostic gadget driver running inside a USB device.
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@ -43,23 +42,11 @@
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/usb/composite.h>
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#include "g_zero.h"
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#include "gadget_chips.h"
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/*-------------------------------------------------------------------------*/
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/*
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* Kbuild is not very cooperative with respect to linking separately
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* compiled library objects into one module. So for now we won't use
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* separate compilation ... ensuring init/exit sections work to shrink
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* the runtime footprint, and giving us at least some parts of what
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* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
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*/
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#include "f_sourcesink.c"
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#include "f_loopback.c"
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/*-------------------------------------------------------------------------*/
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USB_GADGET_COMPOSITE_OPTIONS();
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@ -67,9 +54,6 @@ USB_GADGET_COMPOSITE_OPTIONS();
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static const char longname[] = "Gadget Zero";
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unsigned buflen = 4096; /* only used for bulk endpoints */
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module_param(buflen, uint, 0);
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/*
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* Normally the "loopback" configuration is second (index 1) so
|
||||
* it's not the default. Here's where to change that order, to
|
||||
|
|
@ -79,6 +63,13 @@ module_param(buflen, uint, 0);
|
|||
static bool loopdefault = 0;
|
||||
module_param(loopdefault, bool, S_IRUGO|S_IWUSR);
|
||||
|
||||
struct usb_zero_options gzero_options = {
|
||||
.isoc_interval = 4,
|
||||
.isoc_maxpacket = 1024,
|
||||
.bulk_buflen = 4096,
|
||||
.qlen = 32,
|
||||
};
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/* Thanks to NetChip Technologies for donating this product ID.
|
||||
|
|
@ -129,10 +120,12 @@ static struct usb_otg_descriptor otg_descriptor = {
|
|||
.bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
|
||||
};
|
||||
|
||||
const struct usb_descriptor_header *otg_desc[] = {
|
||||
static const struct usb_descriptor_header *otg_desc[] = {
|
||||
(struct usb_descriptor_header *) &otg_descriptor,
|
||||
NULL,
|
||||
};
|
||||
#else
|
||||
#define otg_desc NULL
|
||||
#endif
|
||||
|
||||
/* string IDs are assigned dynamically */
|
||||
|
|
@ -163,58 +156,6 @@ static struct usb_gadget_strings *dev_strings[] = {
|
|||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
struct usb_request *alloc_ep_req(struct usb_ep *ep, int len)
|
||||
{
|
||||
struct usb_request *req;
|
||||
|
||||
req = usb_ep_alloc_request(ep, GFP_ATOMIC);
|
||||
if (req) {
|
||||
if (len)
|
||||
req->length = len;
|
||||
else
|
||||
req->length = buflen;
|
||||
req->buf = kmalloc(req->length, GFP_ATOMIC);
|
||||
if (!req->buf) {
|
||||
usb_ep_free_request(ep, req);
|
||||
req = NULL;
|
||||
}
|
||||
}
|
||||
return req;
|
||||
}
|
||||
|
||||
void free_ep_req(struct usb_ep *ep, struct usb_request *req)
|
||||
{
|
||||
kfree(req->buf);
|
||||
usb_ep_free_request(ep, req);
|
||||
}
|
||||
|
||||
static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
|
||||
{
|
||||
int value;
|
||||
|
||||
if (ep->driver_data) {
|
||||
value = usb_ep_disable(ep);
|
||||
if (value < 0)
|
||||
DBG(cdev, "disable %s --> %d\n",
|
||||
ep->name, value);
|
||||
ep->driver_data = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
void disable_endpoints(struct usb_composite_dev *cdev,
|
||||
struct usb_ep *in, struct usb_ep *out,
|
||||
struct usb_ep *iso_in, struct usb_ep *iso_out)
|
||||
{
|
||||
disable_ep(cdev, in);
|
||||
disable_ep(cdev, out);
|
||||
if (iso_in)
|
||||
disable_ep(cdev, iso_in);
|
||||
if (iso_out)
|
||||
disable_ep(cdev, iso_out);
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
static struct timer_list autoresume_timer;
|
||||
|
||||
static void zero_autoresume(unsigned long _c)
|
||||
|
|
@ -258,23 +199,63 @@ static void zero_resume(struct usb_composite_dev *cdev)
|
|||
|
||||
static struct usb_configuration loopback_driver = {
|
||||
.label = "loopback",
|
||||
.strings = loopback_strings,
|
||||
.bConfigurationValue = 2,
|
||||
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
|
||||
/* .iConfiguration = DYNAMIC */
|
||||
};
|
||||
|
||||
static struct usb_function *func_ss;
|
||||
static struct usb_function_instance *func_inst_ss;
|
||||
|
||||
static int ss_config_setup(struct usb_configuration *c,
|
||||
const struct usb_ctrlrequest *ctrl)
|
||||
{
|
||||
switch (ctrl->bRequest) {
|
||||
case 0x5b:
|
||||
case 0x5c:
|
||||
return func_ss->setup(func_ss, ctrl);
|
||||
default:
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
}
|
||||
|
||||
static struct usb_configuration sourcesink_driver = {
|
||||
.label = "source/sink",
|
||||
.strings = sourcesink_strings,
|
||||
.setup = ss_config_setup,
|
||||
.bConfigurationValue = 3,
|
||||
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
|
||||
/* .iConfiguration = DYNAMIC */
|
||||
};
|
||||
|
||||
module_param_named(buflen, gzero_options.bulk_buflen, uint, 0);
|
||||
module_param_named(pattern, gzero_options.pattern, uint, S_IRUGO|S_IWUSR);
|
||||
MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63, 2 = none");
|
||||
|
||||
module_param_named(isoc_interval, gzero_options.isoc_interval, uint,
|
||||
S_IRUGO|S_IWUSR);
|
||||
MODULE_PARM_DESC(isoc_interval, "1 - 16");
|
||||
|
||||
module_param_named(isoc_maxpacket, gzero_options.isoc_maxpacket, uint,
|
||||
S_IRUGO|S_IWUSR);
|
||||
MODULE_PARM_DESC(isoc_maxpacket, "0 - 1023 (fs), 0 - 1024 (hs/ss)");
|
||||
|
||||
module_param_named(isoc_mult, gzero_options.isoc_mult, uint, S_IRUGO|S_IWUSR);
|
||||
MODULE_PARM_DESC(isoc_mult, "0 - 2 (hs/ss only)");
|
||||
|
||||
module_param_named(isoc_maxburst, gzero_options.isoc_maxburst, uint,
|
||||
S_IRUGO|S_IWUSR);
|
||||
MODULE_PARM_DESC(isoc_maxburst, "0 - 15 (ss only)");
|
||||
|
||||
static struct usb_function *func_lb;
|
||||
static struct usb_function_instance *func_inst_lb;
|
||||
|
||||
module_param_named(qlen, gzero_options.qlen, uint, S_IRUGO|S_IWUSR);
|
||||
MODULE_PARM_DESC(qlen, "depth of loopback queue");
|
||||
|
||||
static int __init zero_bind(struct usb_composite_dev *cdev)
|
||||
{
|
||||
struct f_ss_opts *ss_opts;
|
||||
struct f_lb_opts *lb_opts;
|
||||
int status;
|
||||
|
||||
/* Allocate string descriptor numbers ... note that string
|
||||
|
|
@ -290,6 +271,36 @@ static int __init zero_bind(struct usb_composite_dev *cdev)
|
|||
|
||||
setup_timer(&autoresume_timer, zero_autoresume, (unsigned long) cdev);
|
||||
|
||||
func_inst_ss = usb_get_function_instance("SourceSink");
|
||||
if (IS_ERR(func_inst_ss))
|
||||
return PTR_ERR(func_inst_ss);
|
||||
|
||||
ss_opts = container_of(func_inst_ss, struct f_ss_opts, func_inst);
|
||||
ss_opts->pattern = gzero_options.pattern;
|
||||
ss_opts->isoc_interval = gzero_options.isoc_interval;
|
||||
ss_opts->isoc_maxpacket = gzero_options.isoc_maxpacket;
|
||||
ss_opts->isoc_mult = gzero_options.isoc_mult;
|
||||
ss_opts->isoc_maxburst = gzero_options.isoc_maxpacket;
|
||||
ss_opts->bulk_buflen = gzero_options.bulk_buflen;
|
||||
|
||||
func_ss = usb_get_function(func_inst_ss);
|
||||
if (IS_ERR(func_ss))
|
||||
goto err_put_func_inst_ss;
|
||||
|
||||
func_inst_lb = usb_get_function_instance("Loopback");
|
||||
if (IS_ERR(func_inst_lb))
|
||||
goto err_put_func_ss;
|
||||
|
||||
lb_opts = container_of(func_inst_lb, struct f_lb_opts, func_inst);
|
||||
lb_opts->bulk_buflen = gzero_options.bulk_buflen;
|
||||
lb_opts->qlen = gzero_options.qlen;
|
||||
|
||||
func_lb = usb_get_function(func_inst_lb);
|
||||
if (IS_ERR(func_lb)) {
|
||||
status = PTR_ERR(func_lb);
|
||||
goto err_put_func_inst_lb;
|
||||
}
|
||||
|
||||
sourcesink_driver.iConfiguration = strings_dev[USB_GZERO_SS_DESC].id;
|
||||
loopback_driver.iConfiguration = strings_dev[USB_GZERO_LB_DESC].id;
|
||||
|
||||
|
|
@ -315,25 +326,50 @@ static int __init zero_bind(struct usb_composite_dev *cdev)
|
|||
* SH3 only allows one config...
|
||||
*/
|
||||
if (loopdefault) {
|
||||
usb_add_config(cdev, &loopback_driver, loopback_bind_config);
|
||||
usb_add_config(cdev, &sourcesink_driver,
|
||||
sourcesink_bind_config);
|
||||
usb_add_config_only(cdev, &loopback_driver);
|
||||
usb_add_config_only(cdev, &sourcesink_driver);
|
||||
} else {
|
||||
usb_add_config(cdev, &sourcesink_driver,
|
||||
sourcesink_bind_config);
|
||||
usb_add_config(cdev, &loopback_driver, loopback_bind_config);
|
||||
usb_add_config_only(cdev, &sourcesink_driver);
|
||||
usb_add_config_only(cdev, &loopback_driver);
|
||||
}
|
||||
status = usb_add_function(&sourcesink_driver, func_ss);
|
||||
if (status)
|
||||
goto err_conf_flb;
|
||||
|
||||
usb_ep_autoconfig_reset(cdev->gadget);
|
||||
status = usb_add_function(&loopback_driver, func_lb);
|
||||
if (status)
|
||||
goto err_conf_flb;
|
||||
|
||||
usb_ep_autoconfig_reset(cdev->gadget);
|
||||
usb_composite_overwrite_options(cdev, &coverwrite);
|
||||
|
||||
INFO(cdev, "%s, version: " DRIVER_VERSION "\n", longname);
|
||||
|
||||
return 0;
|
||||
|
||||
err_conf_flb:
|
||||
usb_put_function(func_lb);
|
||||
func_lb = NULL;
|
||||
err_put_func_inst_lb:
|
||||
usb_put_function_instance(func_inst_lb);
|
||||
func_inst_lb = NULL;
|
||||
err_put_func_ss:
|
||||
usb_put_function(func_ss);
|
||||
func_ss = NULL;
|
||||
err_put_func_inst_ss:
|
||||
usb_put_function_instance(func_inst_ss);
|
||||
func_inst_ss = NULL;
|
||||
return status;
|
||||
}
|
||||
|
||||
static int zero_unbind(struct usb_composite_dev *cdev)
|
||||
{
|
||||
del_timer_sync(&autoresume_timer);
|
||||
if (!IS_ERR_OR_NULL(func_ss))
|
||||
usb_put_function(func_ss);
|
||||
if (!IS_ERR_OR_NULL(func_lb))
|
||||
usb_put_function(func_lb);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue