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usb: gadget: f_eem: convert to new function interface with backward compatibility
Converting eem to the new function interface requires converting the USB eem's function code and its users. This patch converts the f_eem.c to the new function interface. The file is now compiled into a separate usb_f_eem.ko module. The old function interface is provided by means of a preprocessor conditional directives. After all users are converted, the old interface can be removed. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Andrzej Pietrasiewicz
Felipe Balbi
parent
9c62ce83e4
commit
b29002a157
@ -520,6 +520,9 @@ config USB_F_ECM
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config USB_F_PHONET
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tristate
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config USB_F_EEM
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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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@ -54,6 +54,8 @@ usb_f_ecm-y := f_ecm.o
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obj-$(CONFIG_USB_F_ECM) += usb_f_ecm.o
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usb_f_phonet-y := f_phonet.o
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obj-$(CONFIG_USB_F_PHONET) += usb_f_phonet.o
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usb_f_eem-y := f_eem.o
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obj-$(CONFIG_USB_F_EEM) += usb_f_eem.o
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#
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# USB gadget drivers
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@ -108,6 +108,8 @@ static inline bool has_rndis(void)
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#include "f_rndis.c"
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#include "rndis.h"
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#endif
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#define USB_FEEM_INCLUDED
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#include "f_eem.c"
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/*-------------------------------------------------------------------------*/
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@ -12,12 +12,14 @@
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/etherdevice.h>
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#include <linux/crc32.h>
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#include <linux/slab.h>
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#include "u_ether.h"
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#include "u_eem.h"
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#define EEM_HLEN 2
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@ -40,7 +42,7 @@ static inline struct f_eem *func_to_eem(struct usb_function *f)
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/* interface descriptor: */
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static struct usb_interface_descriptor eem_intf __initdata = {
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static struct usb_interface_descriptor eem_intf = {
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.bLength = sizeof eem_intf,
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.bDescriptorType = USB_DT_INTERFACE,
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@ -54,7 +56,7 @@ static struct usb_interface_descriptor eem_intf __initdata = {
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/* full speed support: */
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static struct usb_endpoint_descriptor eem_fs_in_desc __initdata = {
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static struct usb_endpoint_descriptor eem_fs_in_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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@ -62,7 +64,7 @@ static struct usb_endpoint_descriptor eem_fs_in_desc __initdata = {
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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};
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static struct usb_endpoint_descriptor eem_fs_out_desc __initdata = {
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static struct usb_endpoint_descriptor eem_fs_out_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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@ -70,7 +72,7 @@ static struct usb_endpoint_descriptor eem_fs_out_desc __initdata = {
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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};
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static struct usb_descriptor_header *eem_fs_function[] __initdata = {
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static struct usb_descriptor_header *eem_fs_function[] = {
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/* CDC EEM control descriptors */
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(struct usb_descriptor_header *) &eem_intf,
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(struct usb_descriptor_header *) &eem_fs_in_desc,
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@ -80,7 +82,7 @@ static struct usb_descriptor_header *eem_fs_function[] __initdata = {
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/* high speed support: */
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static struct usb_endpoint_descriptor eem_hs_in_desc __initdata = {
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static struct usb_endpoint_descriptor eem_hs_in_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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@ -89,7 +91,7 @@ static struct usb_endpoint_descriptor eem_hs_in_desc __initdata = {
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.wMaxPacketSize = cpu_to_le16(512),
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};
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static struct usb_endpoint_descriptor eem_hs_out_desc __initdata = {
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static struct usb_endpoint_descriptor eem_hs_out_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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@ -98,7 +100,7 @@ static struct usb_endpoint_descriptor eem_hs_out_desc __initdata = {
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.wMaxPacketSize = cpu_to_le16(512),
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};
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static struct usb_descriptor_header *eem_hs_function[] __initdata = {
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static struct usb_descriptor_header *eem_hs_function[] = {
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/* CDC EEM control descriptors */
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(struct usb_descriptor_header *) &eem_intf,
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(struct usb_descriptor_header *) &eem_hs_in_desc,
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@ -108,7 +110,7 @@ static struct usb_descriptor_header *eem_hs_function[] __initdata = {
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/* super speed support: */
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static struct usb_endpoint_descriptor eem_ss_in_desc __initdata = {
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static struct usb_endpoint_descriptor eem_ss_in_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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@ -117,7 +119,7 @@ static struct usb_endpoint_descriptor eem_ss_in_desc __initdata = {
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.wMaxPacketSize = cpu_to_le16(1024),
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};
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static struct usb_endpoint_descriptor eem_ss_out_desc __initdata = {
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static struct usb_endpoint_descriptor eem_ss_out_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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@ -126,7 +128,7 @@ static struct usb_endpoint_descriptor eem_ss_out_desc __initdata = {
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.wMaxPacketSize = cpu_to_le16(1024),
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};
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static struct usb_ss_ep_comp_descriptor eem_ss_bulk_comp_desc __initdata = {
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static struct usb_ss_ep_comp_descriptor eem_ss_bulk_comp_desc = {
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.bLength = sizeof eem_ss_bulk_comp_desc,
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.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
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@ -135,7 +137,7 @@ static struct usb_ss_ep_comp_descriptor eem_ss_bulk_comp_desc __initdata = {
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/* .bmAttributes = 0, */
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};
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static struct usb_descriptor_header *eem_ss_function[] __initdata = {
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static struct usb_descriptor_header *eem_ss_function[] = {
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/* CDC EEM control descriptors */
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(struct usb_descriptor_header *) &eem_intf,
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(struct usb_descriptor_header *) &eem_ss_in_desc,
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@ -242,14 +244,44 @@ static void eem_disable(struct usb_function *f)
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/* EEM function driver setup/binding */
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static int __init
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eem_bind(struct usb_configuration *c, struct usb_function *f)
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static int eem_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_eem *eem = func_to_eem(f);
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int status;
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struct usb_ep *ep;
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#ifndef USB_FEEM_INCLUDED
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struct f_eem_opts *eem_opts;
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eem_opts = container_of(f->fi, struct f_eem_opts, func_inst);
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/*
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* in drivers/usb/gadget/configfs.c:configfs_composite_bind()
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* configurations are bound in sequence with list_for_each_entry,
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* in each configuration its functions are bound in sequence
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* with list_for_each_entry, so we assume no race condition
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* with regard to eem_opts->bound access
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*/
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if (!eem_opts->bound) {
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gether_set_gadget(eem_opts->net, cdev->gadget);
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status = gether_register_netdev(eem_opts->net);
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if (status)
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return status;
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eem_opts->bound = true;
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}
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#endif
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/* maybe allocate device-global string IDs */
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if (eem_string_defs[0].id == 0) {
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/* control interface label */
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status = usb_string_id(c->cdev);
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if (status < 0)
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return status;
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eem_string_defs[0].id = status;
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eem_intf.iInterface = status;
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}
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/* allocate instance-specific interface IDs */
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status = usb_interface_id(c, f);
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if (status < 0)
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@ -307,17 +339,6 @@ fail:
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return status;
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}
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static void
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eem_unbind(struct usb_configuration *c, struct usb_function *f)
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{
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struct f_eem *eem = func_to_eem(f);
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DBG(c->cdev, "eem unbind\n");
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usb_free_all_descriptors(f);
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kfree(eem);
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}
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static void eem_cmd_complete(struct usb_ep *ep, struct usb_request *req)
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{
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struct sk_buff *skb = (struct sk_buff *)req->context;
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@ -518,6 +539,18 @@ error:
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return status;
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}
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#ifdef USB_FEEM_INCLUDED
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static void eem_old_unbind(struct usb_configuration *c, struct usb_function *f)
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{
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struct f_eem *eem = func_to_eem(f);
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DBG(c->cdev, "eem unbind\n");
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usb_free_all_descriptors(f);
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kfree(eem);
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}
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/**
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* eem_bind_config - add CDC Ethernet (EEM) network link to a configuration
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* @c: the configuration to support the network link
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@ -533,17 +566,6 @@ int __init eem_bind_config(struct usb_configuration *c, struct eth_dev *dev)
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struct f_eem *eem;
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int status;
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/* maybe allocate device-global string IDs */
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if (eem_string_defs[0].id == 0) {
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/* control interface label */
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status = usb_string_id(c->cdev);
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if (status < 0)
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return status;
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eem_string_defs[0].id = status;
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eem_intf.iInterface = status;
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}
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/* allocate and initialize one new instance */
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eem = kzalloc(sizeof *eem, GFP_KERNEL);
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if (!eem)
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@ -556,7 +578,7 @@ int __init eem_bind_config(struct usb_configuration *c, struct eth_dev *dev)
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eem->port.func.strings = eem_strings;
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/* descriptors are per-instance copies */
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eem->port.func.bind = eem_bind;
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eem->port.func.unbind = eem_unbind;
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eem->port.func.unbind = eem_old_unbind;
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eem->port.func.set_alt = eem_set_alt;
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eem->port.func.setup = eem_setup;
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eem->port.func.disable = eem_disable;
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@ -570,3 +592,83 @@ int __init eem_bind_config(struct usb_configuration *c, struct eth_dev *dev)
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return status;
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}
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#else
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static void eem_free_inst(struct usb_function_instance *f)
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{
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struct f_eem_opts *opts;
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opts = container_of(f, struct f_eem_opts, func_inst);
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if (opts->bound)
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gether_cleanup(netdev_priv(opts->net));
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else
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free_netdev(opts->net);
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kfree(opts);
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}
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static struct usb_function_instance *eem_alloc_inst(void)
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{
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struct f_eem_opts *opts;
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opts = kzalloc(sizeof(*opts), GFP_KERNEL);
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if (!opts)
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return ERR_PTR(-ENOMEM);
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opts->func_inst.free_func_inst = eem_free_inst;
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opts->net = gether_setup_default();
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if (IS_ERR(opts->net))
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return ERR_CAST(opts->net);
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return &opts->func_inst;
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}
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static void eem_free(struct usb_function *f)
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{
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struct f_eem *eem;
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eem = func_to_eem(f);
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kfree(eem);
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}
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static void eem_unbind(struct usb_configuration *c, struct usb_function *f)
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{
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DBG(c->cdev, "eem unbind\n");
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usb_free_all_descriptors(f);
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}
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struct usb_function *eem_alloc(struct usb_function_instance *fi)
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{
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struct f_eem *eem;
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struct f_eem_opts *opts;
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/* allocate and initialize one new instance */
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eem = kzalloc(sizeof(*eem), GFP_KERNEL);
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if (!eem)
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return ERR_PTR(-ENOMEM);
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opts = container_of(fi, struct f_eem_opts, func_inst);
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eem->port.ioport = netdev_priv(opts->net);
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eem->port.cdc_filter = DEFAULT_FILTER;
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eem->port.func.name = "cdc_eem";
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eem->port.func.strings = eem_strings;
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/* descriptors are per-instance copies */
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eem->port.func.bind = eem_bind;
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eem->port.func.unbind = eem_unbind;
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eem->port.func.set_alt = eem_set_alt;
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eem->port.func.setup = eem_setup;
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eem->port.func.disable = eem_disable;
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eem->port.func.free_func = eem_free;
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eem->port.wrap = eem_wrap;
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eem->port.unwrap = eem_unwrap;
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eem->port.header_len = EEM_HLEN;
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return &eem->port.func;
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}
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DECLARE_USB_FUNCTION_INIT(eem, eem_alloc_inst, eem_alloc);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("David Brownell");
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#endif
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27
drivers/usb/gadget/u_eem.h
Normal file
27
drivers/usb/gadget/u_eem.h
Normal file
@ -0,0 +1,27 @@
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/*
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* u_eem.h
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*
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* Utility definitions for the eem function
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*
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* Copyright (c) 2013 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef U_EEM_H
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#define U_EEM_H
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#include <linux/usb/composite.h>
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struct f_eem_opts {
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struct usb_function_instance func_inst;
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struct net_device *net;
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bool bound;
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};
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#endif /* U_EEM_H */
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