mirror of https://gitee.com/openkylin/linux.git
2674 lines
72 KiB
C
2674 lines
72 KiB
C
/*
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* ether.c -- Ethernet gadget driver, with CDC and non-CDC options
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*
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* Copyright (C) 2003-2005 David Brownell
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* Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// #define DEBUG 1
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// #define VERBOSE
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/timer.h>
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#include <linux/list.h>
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#include <linux/interrupt.h>
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#include <linux/utsname.h>
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#include <linux/device.h>
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#include <linux/moduleparam.h>
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#include <linux/ctype.h>
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#include <asm/byteorder.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include <asm/unaligned.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/cdc.h>
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#include <linux/usb_gadget.h>
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#include <linux/random.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include "gadget_chips.h"
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/*-------------------------------------------------------------------------*/
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/*
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* Ethernet gadget driver -- with CDC and non-CDC options
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* Builds on hardware support for a full duplex link.
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*
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* CDC Ethernet is the standard USB solution for sending Ethernet frames
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* using USB. Real hardware tends to use the same framing protocol but look
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* different for control features. This driver strongly prefers to use
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* this USB-IF standard as its open-systems interoperability solution;
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* most host side USB stacks (except from Microsoft) support it.
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*
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* There's some hardware that can't talk CDC. We make that hardware
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* implement a "minimalist" vendor-agnostic CDC core: same framing, but
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* link-level setup only requires activating the configuration. Only the
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* endpoint descriptors, and product/vendor IDs, are relevant; no control
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* operations are available. Linux supports it, but other host operating
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* systems may not. (This is a subset of CDC Ethernet.)
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*
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* It turns out that if you add a few descriptors to that "CDC Subset",
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* (Windows) host side drivers from MCCI can treat it as one submode of
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* a proprietary scheme called "SAFE" ... without needing to know about
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* specific product/vendor IDs. So we do that, making it easier to use
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* those MS-Windows drivers. Those added descriptors make it resemble a
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* CDC MDLM device, but they don't change device behavior at all. (See
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* MCCI Engineering report 950198 "SAFE Networking Functions".)
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*
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* A third option is also in use. Rather than CDC Ethernet, or something
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* simpler, Microsoft pushes their own approach: RNDIS. The published
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* RNDIS specs are ambiguous and appear to be incomplete, and are also
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* needlessly complex.
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*/
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#define DRIVER_DESC "Ethernet Gadget"
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#define DRIVER_VERSION "May Day 2005"
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static const char shortname [] = "ether";
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static const char driver_desc [] = DRIVER_DESC;
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#define RX_EXTRA 20 /* guard against rx overflows */
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#include "rndis.h"
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#ifndef CONFIG_USB_ETH_RNDIS
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#define rndis_uninit(x) do{}while(0)
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#define rndis_deregister(c) do{}while(0)
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#define rndis_exit() do{}while(0)
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#endif
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/* CDC and RNDIS support the same host-chosen outgoing packet filters. */
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#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
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|USB_CDC_PACKET_TYPE_ALL_MULTICAST \
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|USB_CDC_PACKET_TYPE_PROMISCUOUS \
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|USB_CDC_PACKET_TYPE_DIRECTED)
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/*-------------------------------------------------------------------------*/
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struct eth_dev {
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spinlock_t lock;
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struct usb_gadget *gadget;
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struct usb_request *req; /* for control responses */
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struct usb_request *stat_req; /* for cdc & rndis status */
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u8 config;
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struct usb_ep *in_ep, *out_ep, *status_ep;
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const struct usb_endpoint_descriptor
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*in, *out, *status;
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spinlock_t req_lock;
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struct list_head tx_reqs, rx_reqs;
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struct net_device *net;
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struct net_device_stats stats;
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atomic_t tx_qlen;
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struct work_struct work;
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unsigned zlp:1;
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unsigned cdc:1;
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unsigned rndis:1;
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unsigned suspended:1;
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u16 cdc_filter;
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unsigned long todo;
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#define WORK_RX_MEMORY 0
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int rndis_config;
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u8 host_mac [ETH_ALEN];
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};
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/* This version autoconfigures as much as possible at run-time.
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*
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* It also ASSUMES a self-powered device, without remote wakeup,
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* although remote wakeup support would make sense.
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*/
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/*-------------------------------------------------------------------------*/
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/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
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* Instead: allocate your own, using normal USB-IF procedures.
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*/
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/* Thanks to NetChip Technologies for donating this product ID.
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* It's for devices with only CDC Ethernet configurations.
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*/
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#define CDC_VENDOR_NUM 0x0525 /* NetChip */
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#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
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/* For hardware that can't talk CDC, we use the same vendor ID that
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* ARM Linux has used for ethernet-over-usb, both with sa1100 and
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* with pxa250. We're protocol-compatible, if the host-side drivers
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* use the endpoint descriptors. bcdDevice (version) is nonzero, so
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* drivers that need to hard-wire endpoint numbers have a hook.
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*
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* The protocol is a minimal subset of CDC Ether, which works on any bulk
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* hardware that's not deeply broken ... even on hardware that can't talk
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* RNDIS (like SA-1100, with no interrupt endpoint, or anything that
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* doesn't handle control-OUT).
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*/
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#define SIMPLE_VENDOR_NUM 0x049f
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#define SIMPLE_PRODUCT_NUM 0x505a
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/* For hardware that can talk RNDIS and either of the above protocols,
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* use this ID ... the windows INF files will know it. Unless it's
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* used with CDC Ethernet, Linux 2.4 hosts will need updates to choose
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* the non-RNDIS configuration.
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*/
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#define RNDIS_VENDOR_NUM 0x0525 /* NetChip */
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#define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */
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/* Some systems will want different product identifers published in the
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* device descriptor, either numbers or strings or both. These string
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* parameters are in UTF-8 (superset of ASCII's 7 bit characters).
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*/
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static ushort idVendor;
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module_param(idVendor, ushort, S_IRUGO);
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MODULE_PARM_DESC(idVendor, "USB Vendor ID");
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static ushort idProduct;
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module_param(idProduct, ushort, S_IRUGO);
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MODULE_PARM_DESC(idProduct, "USB Product ID");
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static ushort bcdDevice;
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module_param(bcdDevice, ushort, S_IRUGO);
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MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)");
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static char *iManufacturer;
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module_param(iManufacturer, charp, S_IRUGO);
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MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string");
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static char *iProduct;
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module_param(iProduct, charp, S_IRUGO);
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MODULE_PARM_DESC(iProduct, "USB Product string");
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static char *iSerialNumber;
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module_param(iSerialNumber, charp, S_IRUGO);
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MODULE_PARM_DESC(iSerialNumber, "SerialNumber");
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/* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */
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static char *dev_addr;
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module_param(dev_addr, charp, S_IRUGO);
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MODULE_PARM_DESC(dev_addr, "Device Ethernet Address");
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/* this address is invisible to ifconfig */
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static char *host_addr;
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module_param(host_addr, charp, S_IRUGO);
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MODULE_PARM_DESC(host_addr, "Host Ethernet Address");
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/*-------------------------------------------------------------------------*/
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/* Include CDC support if we could run on CDC-capable hardware. */
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#ifdef CONFIG_USB_GADGET_NET2280
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_DUMMY_HCD
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_GOKU
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_LH7A40X
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_MQ11XX
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_OMAP
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_N9604
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_PXA27X
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_S3C2410
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_AT91
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_MUSBHSFC
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_MUSB_HDRC
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_ATMEL_USBA
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#define DEV_CONFIG_CDC
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#endif
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#ifdef CONFIG_USB_GADGET_FSL_USB2
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#define DEV_CONFIG_CDC
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#endif
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/* For CDC-incapable hardware, choose the simple cdc subset.
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* Anything that talks bulk (without notable bugs) can do this.
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*/
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#ifdef CONFIG_USB_GADGET_PXA2XX
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#define DEV_CONFIG_SUBSET
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#endif
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#ifdef CONFIG_USB_GADGET_SUPERH
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#define DEV_CONFIG_SUBSET
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#endif
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#ifdef CONFIG_USB_GADGET_SA1100
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/* use non-CDC for backwards compatibility */
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#define DEV_CONFIG_SUBSET
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#endif
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#ifdef CONFIG_USB_GADGET_M66592
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#define DEV_CONFIG_CDC
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#endif
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/*-------------------------------------------------------------------------*/
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/* "main" config is either CDC, or its simple subset */
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static inline int is_cdc(struct eth_dev *dev)
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{
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#if !defined(DEV_CONFIG_SUBSET)
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return 1; /* only cdc possible */
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#elif !defined (DEV_CONFIG_CDC)
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return 0; /* only subset possible */
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#else
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return dev->cdc; /* depends on what hardware we found */
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#endif
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}
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/* "secondary" RNDIS config may sometimes be activated */
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static inline int rndis_active(struct eth_dev *dev)
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{
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#ifdef CONFIG_USB_ETH_RNDIS
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return dev->rndis;
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#else
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return 0;
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#endif
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}
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#define subset_active(dev) (!is_cdc(dev) && !rndis_active(dev))
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#define cdc_active(dev) ( is_cdc(dev) && !rndis_active(dev))
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#define DEFAULT_QLEN 2 /* double buffering by default */
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/* peak bulk transfer bits-per-second */
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#define HS_BPS (13 * 512 * 8 * 1000 * 8)
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#define FS_BPS (19 * 64 * 1 * 1000 * 8)
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#ifdef CONFIG_USB_GADGET_DUALSPEED
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#define DEVSPEED USB_SPEED_HIGH
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static unsigned qmult = 5;
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module_param (qmult, uint, S_IRUGO|S_IWUSR);
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/* for dual-speed hardware, use deeper queues at highspeed */
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#define qlen(gadget) \
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(DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1))
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/* also defer IRQs on highspeed TX */
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#define TX_DELAY qmult
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static inline int BITRATE(struct usb_gadget *g)
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{
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return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS;
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}
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#else /* full speed (low speed doesn't do bulk) */
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#define DEVSPEED USB_SPEED_FULL
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#define qlen(gadget) DEFAULT_QLEN
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static inline int BITRATE(struct usb_gadget *g)
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{
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return FS_BPS;
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}
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#endif
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/*-------------------------------------------------------------------------*/
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#define xprintk(d,level,fmt,args...) \
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printk(level "%s: " fmt , (d)->net->name , ## args)
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#ifdef DEBUG
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#undef DEBUG
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#define DEBUG(dev,fmt,args...) \
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xprintk(dev , KERN_DEBUG , fmt , ## args)
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#else
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#define DEBUG(dev,fmt,args...) \
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do { } while (0)
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#endif /* DEBUG */
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#ifdef VERBOSE
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#define VDEBUG DEBUG
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#else
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#define VDEBUG(dev,fmt,args...) \
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do { } while (0)
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#endif /* DEBUG */
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#define ERROR(dev,fmt,args...) \
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xprintk(dev , KERN_ERR , fmt , ## args)
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#define WARN(dev,fmt,args...) \
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xprintk(dev , KERN_WARNING , fmt , ## args)
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#define INFO(dev,fmt,args...) \
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xprintk(dev , KERN_INFO , fmt , ## args)
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/*-------------------------------------------------------------------------*/
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/* USB DRIVER HOOKUP (to the hardware driver, below us), mostly
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* ep0 implementation: descriptors, config management, setup().
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* also optional class-specific notification interrupt transfer.
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*/
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/*
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* DESCRIPTORS ... most are static, but strings and (full) configuration
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* descriptors are built on demand. For now we do either full CDC, or
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* our simple subset, with RNDIS as an optional second configuration.
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*
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* RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But
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* the class descriptors match a modem (they're ignored; it's really just
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* Ethernet functionality), they don't need the NOP altsetting, and the
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* status transfer endpoint isn't optional.
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*/
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#define STRING_MANUFACTURER 1
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#define STRING_PRODUCT 2
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#define STRING_ETHADDR 3
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#define STRING_DATA 4
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#define STRING_CONTROL 5
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#define STRING_RNDIS_CONTROL 6
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#define STRING_CDC 7
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#define STRING_SUBSET 8
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#define STRING_RNDIS 9
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#define STRING_SERIALNUMBER 10
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/* holds our biggest descriptor (or RNDIS response) */
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#define USB_BUFSIZ 256
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/*
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* This device advertises one configuration, eth_config, unless RNDIS
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* is enabled (rndis_config) on hardware supporting at least two configs.
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*
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* NOTE: Controllers like superh_udc should probably be able to use
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* an RNDIS-only configuration.
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*
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* FIXME define some higher-powered configurations to make it easier
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* to recharge batteries ...
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*/
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#define DEV_CONFIG_VALUE 1 /* cdc or subset */
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#define DEV_RNDIS_CONFIG_VALUE 2 /* rndis; optional */
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static struct usb_device_descriptor
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device_desc = {
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.bLength = sizeof device_desc,
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.bDescriptorType = USB_DT_DEVICE,
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.bcdUSB = __constant_cpu_to_le16 (0x0200),
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.bDeviceClass = USB_CLASS_COMM,
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.bDeviceSubClass = 0,
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.bDeviceProtocol = 0,
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.idVendor = __constant_cpu_to_le16 (CDC_VENDOR_NUM),
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.idProduct = __constant_cpu_to_le16 (CDC_PRODUCT_NUM),
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.iManufacturer = STRING_MANUFACTURER,
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.iProduct = STRING_PRODUCT,
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.bNumConfigurations = 1,
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};
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static struct usb_otg_descriptor
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otg_descriptor = {
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.bLength = sizeof otg_descriptor,
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.bDescriptorType = USB_DT_OTG,
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.bmAttributes = USB_OTG_SRP,
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};
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static struct usb_config_descriptor
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eth_config = {
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.bLength = sizeof eth_config,
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.bDescriptorType = USB_DT_CONFIG,
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/* compute wTotalLength on the fly */
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.bNumInterfaces = 2,
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.bConfigurationValue = DEV_CONFIG_VALUE,
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.iConfiguration = STRING_CDC,
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.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
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.bMaxPower = 50,
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};
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#ifdef CONFIG_USB_ETH_RNDIS
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static struct usb_config_descriptor
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rndis_config = {
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.bLength = sizeof rndis_config,
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.bDescriptorType = USB_DT_CONFIG,
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/* compute wTotalLength on the fly */
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.bNumInterfaces = 2,
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.bConfigurationValue = DEV_RNDIS_CONFIG_VALUE,
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.iConfiguration = STRING_RNDIS,
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.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
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.bMaxPower = 50,
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};
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#endif
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/*
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* Compared to the simple CDC subset, the full CDC Ethernet model adds
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* three class descriptors, two interface descriptors, optional status
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* endpoint. Both have a "data" interface and two bulk endpoints.
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* There are also differences in how control requests are handled.
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*
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* RNDIS shares a lot with CDC-Ethernet, since it's a variant of the
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* CDC-ACM (modem) spec. Unfortunately MSFT's RNDIS driver is buggy; it
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* may hang or oops. Since bugfixes (or accurate specs, letting Linux
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* work around those bugs) are unlikely to ever come from MSFT, you may
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* wish to avoid using RNDIS.
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*
|
|
* MCCI offers an alternative to RNDIS if you need to connect to Windows
|
|
* but have hardware that can't support CDC Ethernet. We add descriptors
|
|
* to present the CDC Subset as a (nonconformant) CDC MDLM variant called
|
|
* "SAFE". That borrows from both CDC Ethernet and CDC MDLM. You can
|
|
* get those drivers from MCCI, or bundled with various products.
|
|
*/
|
|
|
|
#ifdef DEV_CONFIG_CDC
|
|
static struct usb_interface_descriptor
|
|
control_intf = {
|
|
.bLength = sizeof control_intf,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bInterfaceNumber = 0,
|
|
/* status endpoint is optional; this may be patched later */
|
|
.bNumEndpoints = 1,
|
|
.bInterfaceClass = USB_CLASS_COMM,
|
|
.bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET,
|
|
.bInterfaceProtocol = USB_CDC_PROTO_NONE,
|
|
.iInterface = STRING_CONTROL,
|
|
};
|
|
#endif
|
|
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
static const struct usb_interface_descriptor
|
|
rndis_control_intf = {
|
|
.bLength = sizeof rndis_control_intf,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bInterfaceNumber = 0,
|
|
.bNumEndpoints = 1,
|
|
.bInterfaceClass = USB_CLASS_COMM,
|
|
.bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
|
|
.bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR,
|
|
.iInterface = STRING_RNDIS_CONTROL,
|
|
};
|
|
#endif
|
|
|
|
static const struct usb_cdc_header_desc header_desc = {
|
|
.bLength = sizeof header_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
.bDescriptorSubType = USB_CDC_HEADER_TYPE,
|
|
|
|
.bcdCDC = __constant_cpu_to_le16 (0x0110),
|
|
};
|
|
|
|
#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
|
|
|
|
static const struct usb_cdc_union_desc union_desc = {
|
|
.bLength = sizeof union_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
.bDescriptorSubType = USB_CDC_UNION_TYPE,
|
|
|
|
.bMasterInterface0 = 0, /* index of control interface */
|
|
.bSlaveInterface0 = 1, /* index of DATA interface */
|
|
};
|
|
|
|
#endif /* CDC || RNDIS */
|
|
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
|
|
static const struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
|
|
.bLength = sizeof call_mgmt_descriptor,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
.bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
|
|
|
|
.bmCapabilities = 0x00,
|
|
.bDataInterface = 0x01,
|
|
};
|
|
|
|
static const struct usb_cdc_acm_descriptor acm_descriptor = {
|
|
.bLength = sizeof acm_descriptor,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
.bDescriptorSubType = USB_CDC_ACM_TYPE,
|
|
|
|
.bmCapabilities = 0x00,
|
|
};
|
|
|
|
#endif
|
|
|
|
#ifndef DEV_CONFIG_CDC
|
|
|
|
/* "SAFE" loosely follows CDC WMC MDLM, violating the spec in various
|
|
* ways: data endpoints live in the control interface, there's no data
|
|
* interface, and it's not used to talk to a cell phone radio.
|
|
*/
|
|
|
|
static const struct usb_cdc_mdlm_desc mdlm_desc = {
|
|
.bLength = sizeof mdlm_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
.bDescriptorSubType = USB_CDC_MDLM_TYPE,
|
|
|
|
.bcdVersion = __constant_cpu_to_le16(0x0100),
|
|
.bGUID = {
|
|
0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6,
|
|
0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f,
|
|
},
|
|
};
|
|
|
|
/* since "usb_cdc_mdlm_detail_desc" is a variable length structure, we
|
|
* can't really use its struct. All we do here is say that we're using
|
|
* the submode of "SAFE" which directly matches the CDC Subset.
|
|
*/
|
|
static const u8 mdlm_detail_desc[] = {
|
|
6,
|
|
USB_DT_CS_INTERFACE,
|
|
USB_CDC_MDLM_DETAIL_TYPE,
|
|
|
|
0, /* "SAFE" */
|
|
0, /* network control capabilities (none) */
|
|
0, /* network data capabilities ("raw" encapsulation) */
|
|
};
|
|
|
|
#endif
|
|
|
|
static const struct usb_cdc_ether_desc ether_desc = {
|
|
.bLength = sizeof ether_desc,
|
|
.bDescriptorType = USB_DT_CS_INTERFACE,
|
|
.bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
|
|
|
|
/* this descriptor actually adds value, surprise! */
|
|
.iMACAddress = STRING_ETHADDR,
|
|
.bmEthernetStatistics = __constant_cpu_to_le32 (0), /* no statistics */
|
|
.wMaxSegmentSize = __constant_cpu_to_le16 (ETH_FRAME_LEN),
|
|
.wNumberMCFilters = __constant_cpu_to_le16 (0),
|
|
.bNumberPowerFilters = 0,
|
|
};
|
|
|
|
|
|
#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
|
|
|
|
/* include the status endpoint if we can, even where it's optional.
|
|
* use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
|
|
* packet, to simplify cancellation; and a big transfer interval, to
|
|
* waste less bandwidth.
|
|
*
|
|
* some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even
|
|
* if they ignore the connect/disconnect notifications that real aether
|
|
* can provide. more advanced cdc configurations might want to support
|
|
* encapsulated commands (vendor-specific, using control-OUT).
|
|
*
|
|
* RNDIS requires the status endpoint, since it uses that encapsulation
|
|
* mechanism for its funky RPC scheme.
|
|
*/
|
|
|
|
#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */
|
|
#define STATUS_BYTECOUNT 16 /* 8 byte header + data */
|
|
|
|
static struct usb_endpoint_descriptor
|
|
fs_status_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bEndpointAddress = USB_DIR_IN,
|
|
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
|
.wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT),
|
|
.bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC,
|
|
};
|
|
#endif
|
|
|
|
#ifdef DEV_CONFIG_CDC
|
|
|
|
/* the default data interface has no endpoints ... */
|
|
|
|
static const struct usb_interface_descriptor
|
|
data_nop_intf = {
|
|
.bLength = sizeof data_nop_intf,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bInterfaceNumber = 1,
|
|
.bAlternateSetting = 0,
|
|
.bNumEndpoints = 0,
|
|
.bInterfaceClass = USB_CLASS_CDC_DATA,
|
|
.bInterfaceSubClass = 0,
|
|
.bInterfaceProtocol = 0,
|
|
};
|
|
|
|
/* ... but the "real" data interface has two bulk endpoints */
|
|
|
|
static const struct usb_interface_descriptor
|
|
data_intf = {
|
|
.bLength = sizeof data_intf,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bInterfaceNumber = 1,
|
|
.bAlternateSetting = 1,
|
|
.bNumEndpoints = 2,
|
|
.bInterfaceClass = USB_CLASS_CDC_DATA,
|
|
.bInterfaceSubClass = 0,
|
|
.bInterfaceProtocol = 0,
|
|
.iInterface = STRING_DATA,
|
|
};
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
|
|
/* RNDIS doesn't activate by changing to the "real" altsetting */
|
|
|
|
static const struct usb_interface_descriptor
|
|
rndis_data_intf = {
|
|
.bLength = sizeof rndis_data_intf,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bInterfaceNumber = 1,
|
|
.bAlternateSetting = 0,
|
|
.bNumEndpoints = 2,
|
|
.bInterfaceClass = USB_CLASS_CDC_DATA,
|
|
.bInterfaceSubClass = 0,
|
|
.bInterfaceProtocol = 0,
|
|
.iInterface = STRING_DATA,
|
|
};
|
|
|
|
#endif
|
|
|
|
#ifdef DEV_CONFIG_SUBSET
|
|
|
|
/*
|
|
* "Simple" CDC-subset option is a simple vendor-neutral model that most
|
|
* full speed controllers can handle: one interface, two bulk endpoints.
|
|
*
|
|
* To assist host side drivers, we fancy it up a bit, and add descriptors
|
|
* so some host side drivers will understand it as a "SAFE" variant.
|
|
*/
|
|
|
|
static const struct usb_interface_descriptor
|
|
subset_data_intf = {
|
|
.bLength = sizeof subset_data_intf,
|
|
.bDescriptorType = USB_DT_INTERFACE,
|
|
|
|
.bInterfaceNumber = 0,
|
|
.bAlternateSetting = 0,
|
|
.bNumEndpoints = 2,
|
|
.bInterfaceClass = USB_CLASS_COMM,
|
|
.bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM,
|
|
.bInterfaceProtocol = 0,
|
|
.iInterface = STRING_DATA,
|
|
};
|
|
|
|
#endif /* SUBSET */
|
|
|
|
|
|
static struct usb_endpoint_descriptor
|
|
fs_source_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bEndpointAddress = USB_DIR_IN,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
};
|
|
|
|
static struct usb_endpoint_descriptor
|
|
fs_sink_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bEndpointAddress = USB_DIR_OUT,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
};
|
|
|
|
static const struct usb_descriptor_header *fs_eth_function [11] = {
|
|
(struct usb_descriptor_header *) &otg_descriptor,
|
|
#ifdef DEV_CONFIG_CDC
|
|
/* "cdc" mode descriptors */
|
|
(struct usb_descriptor_header *) &control_intf,
|
|
(struct usb_descriptor_header *) &header_desc,
|
|
(struct usb_descriptor_header *) &union_desc,
|
|
(struct usb_descriptor_header *) ðer_desc,
|
|
/* NOTE: status endpoint may need to be removed */
|
|
(struct usb_descriptor_header *) &fs_status_desc,
|
|
/* data interface, with altsetting */
|
|
(struct usb_descriptor_header *) &data_nop_intf,
|
|
(struct usb_descriptor_header *) &data_intf,
|
|
(struct usb_descriptor_header *) &fs_source_desc,
|
|
(struct usb_descriptor_header *) &fs_sink_desc,
|
|
NULL,
|
|
#endif /* DEV_CONFIG_CDC */
|
|
};
|
|
|
|
static inline void __init fs_subset_descriptors(void)
|
|
{
|
|
#ifdef DEV_CONFIG_SUBSET
|
|
/* behavior is "CDC Subset"; extra descriptors say "SAFE" */
|
|
fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
|
|
fs_eth_function[2] = (struct usb_descriptor_header *) &header_desc;
|
|
fs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc;
|
|
fs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc;
|
|
fs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc;
|
|
fs_eth_function[6] = (struct usb_descriptor_header *) &fs_source_desc;
|
|
fs_eth_function[7] = (struct usb_descriptor_header *) &fs_sink_desc;
|
|
fs_eth_function[8] = NULL;
|
|
#else
|
|
fs_eth_function[1] = NULL;
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
static const struct usb_descriptor_header *fs_rndis_function [] = {
|
|
(struct usb_descriptor_header *) &otg_descriptor,
|
|
/* control interface matches ACM, not Ethernet */
|
|
(struct usb_descriptor_header *) &rndis_control_intf,
|
|
(struct usb_descriptor_header *) &header_desc,
|
|
(struct usb_descriptor_header *) &call_mgmt_descriptor,
|
|
(struct usb_descriptor_header *) &acm_descriptor,
|
|
(struct usb_descriptor_header *) &union_desc,
|
|
(struct usb_descriptor_header *) &fs_status_desc,
|
|
/* data interface has no altsetting */
|
|
(struct usb_descriptor_header *) &rndis_data_intf,
|
|
(struct usb_descriptor_header *) &fs_source_desc,
|
|
(struct usb_descriptor_header *) &fs_sink_desc,
|
|
NULL,
|
|
};
|
|
#endif
|
|
|
|
#ifdef CONFIG_USB_GADGET_DUALSPEED
|
|
|
|
/*
|
|
* usb 2.0 devices need to expose both high speed and full speed
|
|
* descriptors, unless they only run at full speed.
|
|
*/
|
|
|
|
#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
|
|
static struct usb_endpoint_descriptor
|
|
hs_status_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
|
.wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT),
|
|
.bInterval = LOG2_STATUS_INTERVAL_MSEC + 4,
|
|
};
|
|
#endif /* DEV_CONFIG_CDC */
|
|
|
|
static struct usb_endpoint_descriptor
|
|
hs_source_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
.wMaxPacketSize = __constant_cpu_to_le16 (512),
|
|
};
|
|
|
|
static struct usb_endpoint_descriptor
|
|
hs_sink_desc = {
|
|
.bLength = USB_DT_ENDPOINT_SIZE,
|
|
.bDescriptorType = USB_DT_ENDPOINT,
|
|
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
.wMaxPacketSize = __constant_cpu_to_le16 (512),
|
|
};
|
|
|
|
static struct usb_qualifier_descriptor
|
|
dev_qualifier = {
|
|
.bLength = sizeof dev_qualifier,
|
|
.bDescriptorType = USB_DT_DEVICE_QUALIFIER,
|
|
|
|
.bcdUSB = __constant_cpu_to_le16 (0x0200),
|
|
.bDeviceClass = USB_CLASS_COMM,
|
|
|
|
.bNumConfigurations = 1,
|
|
};
|
|
|
|
static const struct usb_descriptor_header *hs_eth_function [11] = {
|
|
(struct usb_descriptor_header *) &otg_descriptor,
|
|
#ifdef DEV_CONFIG_CDC
|
|
/* "cdc" mode descriptors */
|
|
(struct usb_descriptor_header *) &control_intf,
|
|
(struct usb_descriptor_header *) &header_desc,
|
|
(struct usb_descriptor_header *) &union_desc,
|
|
(struct usb_descriptor_header *) ðer_desc,
|
|
/* NOTE: status endpoint may need to be removed */
|
|
(struct usb_descriptor_header *) &hs_status_desc,
|
|
/* data interface, with altsetting */
|
|
(struct usb_descriptor_header *) &data_nop_intf,
|
|
(struct usb_descriptor_header *) &data_intf,
|
|
(struct usb_descriptor_header *) &hs_source_desc,
|
|
(struct usb_descriptor_header *) &hs_sink_desc,
|
|
NULL,
|
|
#endif /* DEV_CONFIG_CDC */
|
|
};
|
|
|
|
static inline void __init hs_subset_descriptors(void)
|
|
{
|
|
#ifdef DEV_CONFIG_SUBSET
|
|
/* behavior is "CDC Subset"; extra descriptors say "SAFE" */
|
|
hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
|
|
hs_eth_function[2] = (struct usb_descriptor_header *) &header_desc;
|
|
hs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc;
|
|
hs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc;
|
|
hs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc;
|
|
hs_eth_function[6] = (struct usb_descriptor_header *) &hs_source_desc;
|
|
hs_eth_function[7] = (struct usb_descriptor_header *) &hs_sink_desc;
|
|
hs_eth_function[8] = NULL;
|
|
#else
|
|
hs_eth_function[1] = NULL;
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
static const struct usb_descriptor_header *hs_rndis_function [] = {
|
|
(struct usb_descriptor_header *) &otg_descriptor,
|
|
/* control interface matches ACM, not Ethernet */
|
|
(struct usb_descriptor_header *) &rndis_control_intf,
|
|
(struct usb_descriptor_header *) &header_desc,
|
|
(struct usb_descriptor_header *) &call_mgmt_descriptor,
|
|
(struct usb_descriptor_header *) &acm_descriptor,
|
|
(struct usb_descriptor_header *) &union_desc,
|
|
(struct usb_descriptor_header *) &hs_status_desc,
|
|
/* data interface has no altsetting */
|
|
(struct usb_descriptor_header *) &rndis_data_intf,
|
|
(struct usb_descriptor_header *) &hs_source_desc,
|
|
(struct usb_descriptor_header *) &hs_sink_desc,
|
|
NULL,
|
|
};
|
|
#endif
|
|
|
|
|
|
/* maxpacket and other transfer characteristics vary by speed. */
|
|
#define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs))
|
|
|
|
#else
|
|
|
|
/* if there's no high speed support, maxpacket doesn't change. */
|
|
#define ep_desc(g,hs,fs) (((void)(g)), (fs))
|
|
|
|
static inline void __init hs_subset_descriptors(void)
|
|
{
|
|
}
|
|
|
|
#endif /* !CONFIG_USB_GADGET_DUALSPEED */
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* descriptors that are built on-demand */
|
|
|
|
static char manufacturer [50];
|
|
static char product_desc [40] = DRIVER_DESC;
|
|
static char serial_number [20];
|
|
|
|
/* address that the host will use ... usually assigned at random */
|
|
static char ethaddr [2 * ETH_ALEN + 1];
|
|
|
|
/* static strings, in UTF-8 */
|
|
static struct usb_string strings [] = {
|
|
{ STRING_MANUFACTURER, manufacturer, },
|
|
{ STRING_PRODUCT, product_desc, },
|
|
{ STRING_SERIALNUMBER, serial_number, },
|
|
{ STRING_DATA, "Ethernet Data", },
|
|
{ STRING_ETHADDR, ethaddr, },
|
|
#ifdef DEV_CONFIG_CDC
|
|
{ STRING_CDC, "CDC Ethernet", },
|
|
{ STRING_CONTROL, "CDC Communications Control", },
|
|
#endif
|
|
#ifdef DEV_CONFIG_SUBSET
|
|
{ STRING_SUBSET, "CDC Ethernet Subset", },
|
|
#endif
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
{ STRING_RNDIS, "RNDIS", },
|
|
{ STRING_RNDIS_CONTROL, "RNDIS Communications Control", },
|
|
#endif
|
|
{ } /* end of list */
|
|
};
|
|
|
|
static struct usb_gadget_strings stringtab = {
|
|
.language = 0x0409, /* en-us */
|
|
.strings = strings,
|
|
};
|
|
|
|
/*
|
|
* one config, two interfaces: control, data.
|
|
* complications: class descriptors, and an altsetting.
|
|
*/
|
|
static int
|
|
config_buf (enum usb_device_speed speed,
|
|
u8 *buf, u8 type,
|
|
unsigned index, int is_otg)
|
|
{
|
|
int len;
|
|
const struct usb_config_descriptor *config;
|
|
const struct usb_descriptor_header **function;
|
|
#ifdef CONFIG_USB_GADGET_DUALSPEED
|
|
int hs = (speed == USB_SPEED_HIGH);
|
|
|
|
if (type == USB_DT_OTHER_SPEED_CONFIG)
|
|
hs = !hs;
|
|
#define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function)
|
|
#else
|
|
#define which_fn(t) (fs_ ## t ## _function)
|
|
#endif
|
|
|
|
if (index >= device_desc.bNumConfigurations)
|
|
return -EINVAL;
|
|
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
/* list the RNDIS config first, to make Microsoft's drivers
|
|
* happy. DOCSIS 1.0 needs this too.
|
|
*/
|
|
if (device_desc.bNumConfigurations == 2 && index == 0) {
|
|
config = &rndis_config;
|
|
function = which_fn (rndis);
|
|
} else
|
|
#endif
|
|
{
|
|
config = ð_config;
|
|
function = which_fn (eth);
|
|
}
|
|
|
|
/* for now, don't advertise srp-only devices */
|
|
if (!is_otg)
|
|
function++;
|
|
|
|
len = usb_gadget_config_buf (config, buf, USB_BUFSIZ, function);
|
|
if (len < 0)
|
|
return len;
|
|
((struct usb_config_descriptor *) buf)->bDescriptorType = type;
|
|
return len;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void eth_start (struct eth_dev *dev, gfp_t gfp_flags);
|
|
static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags);
|
|
|
|
static int
|
|
set_ether_config (struct eth_dev *dev, gfp_t gfp_flags)
|
|
{
|
|
int result = 0;
|
|
struct usb_gadget *gadget = dev->gadget;
|
|
|
|
#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
|
|
/* status endpoint used for RNDIS and (optionally) CDC */
|
|
if (!subset_active(dev) && dev->status_ep) {
|
|
dev->status = ep_desc (gadget, &hs_status_desc,
|
|
&fs_status_desc);
|
|
dev->status_ep->driver_data = dev;
|
|
|
|
result = usb_ep_enable (dev->status_ep, dev->status);
|
|
if (result != 0) {
|
|
DEBUG (dev, "enable %s --> %d\n",
|
|
dev->status_ep->name, result);
|
|
goto done;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
dev->in = ep_desc(gadget, &hs_source_desc, &fs_source_desc);
|
|
dev->in_ep->driver_data = dev;
|
|
|
|
dev->out = ep_desc(gadget, &hs_sink_desc, &fs_sink_desc);
|
|
dev->out_ep->driver_data = dev;
|
|
|
|
/* With CDC, the host isn't allowed to use these two data
|
|
* endpoints in the default altsetting for the interface.
|
|
* so we don't activate them yet. Reset from SET_INTERFACE.
|
|
*
|
|
* Strictly speaking RNDIS should work the same: activation is
|
|
* a side effect of setting a packet filter. Deactivation is
|
|
* from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG.
|
|
*/
|
|
if (!cdc_active(dev)) {
|
|
result = usb_ep_enable (dev->in_ep, dev->in);
|
|
if (result != 0) {
|
|
DEBUG(dev, "enable %s --> %d\n",
|
|
dev->in_ep->name, result);
|
|
goto done;
|
|
}
|
|
|
|
result = usb_ep_enable (dev->out_ep, dev->out);
|
|
if (result != 0) {
|
|
DEBUG (dev, "enable %s --> %d\n",
|
|
dev->out_ep->name, result);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
done:
|
|
if (result == 0)
|
|
result = alloc_requests (dev, qlen (gadget), gfp_flags);
|
|
|
|
/* on error, disable any endpoints */
|
|
if (result < 0) {
|
|
if (!subset_active(dev))
|
|
(void) usb_ep_disable (dev->status_ep);
|
|
dev->status = NULL;
|
|
(void) usb_ep_disable (dev->in_ep);
|
|
(void) usb_ep_disable (dev->out_ep);
|
|
dev->in = NULL;
|
|
dev->out = NULL;
|
|
} else
|
|
|
|
/* activate non-CDC configs right away
|
|
* this isn't strictly according to the RNDIS spec
|
|
*/
|
|
if (!cdc_active (dev)) {
|
|
netif_carrier_on (dev->net);
|
|
if (netif_running (dev->net)) {
|
|
spin_unlock (&dev->lock);
|
|
eth_start (dev, GFP_ATOMIC);
|
|
spin_lock (&dev->lock);
|
|
}
|
|
}
|
|
|
|
if (result == 0)
|
|
DEBUG (dev, "qlen %d\n", qlen (gadget));
|
|
|
|
/* caller is responsible for cleanup on error */
|
|
return result;
|
|
}
|
|
|
|
static void eth_reset_config (struct eth_dev *dev)
|
|
{
|
|
struct usb_request *req;
|
|
|
|
if (dev->config == 0)
|
|
return;
|
|
|
|
DEBUG (dev, "%s\n", __FUNCTION__);
|
|
|
|
netif_stop_queue (dev->net);
|
|
netif_carrier_off (dev->net);
|
|
rndis_uninit(dev->rndis_config);
|
|
|
|
/* disable endpoints, forcing (synchronous) completion of
|
|
* pending i/o. then free the requests.
|
|
*/
|
|
if (dev->in) {
|
|
usb_ep_disable (dev->in_ep);
|
|
spin_lock(&dev->req_lock);
|
|
while (likely (!list_empty (&dev->tx_reqs))) {
|
|
req = container_of (dev->tx_reqs.next,
|
|
struct usb_request, list);
|
|
list_del (&req->list);
|
|
|
|
spin_unlock(&dev->req_lock);
|
|
usb_ep_free_request (dev->in_ep, req);
|
|
spin_lock(&dev->req_lock);
|
|
}
|
|
spin_unlock(&dev->req_lock);
|
|
}
|
|
if (dev->out) {
|
|
usb_ep_disable (dev->out_ep);
|
|
spin_lock(&dev->req_lock);
|
|
while (likely (!list_empty (&dev->rx_reqs))) {
|
|
req = container_of (dev->rx_reqs.next,
|
|
struct usb_request, list);
|
|
list_del (&req->list);
|
|
|
|
spin_unlock(&dev->req_lock);
|
|
usb_ep_free_request (dev->out_ep, req);
|
|
spin_lock(&dev->req_lock);
|
|
}
|
|
spin_unlock(&dev->req_lock);
|
|
}
|
|
|
|
if (dev->status) {
|
|
usb_ep_disable (dev->status_ep);
|
|
}
|
|
dev->rndis = 0;
|
|
dev->cdc_filter = 0;
|
|
dev->config = 0;
|
|
}
|
|
|
|
/* change our operational config. must agree with the code
|
|
* that returns config descriptors, and altsetting code.
|
|
*/
|
|
static int
|
|
eth_set_config (struct eth_dev *dev, unsigned number, gfp_t gfp_flags)
|
|
{
|
|
int result = 0;
|
|
struct usb_gadget *gadget = dev->gadget;
|
|
|
|
if (gadget_is_sa1100 (gadget)
|
|
&& dev->config
|
|
&& atomic_read (&dev->tx_qlen) != 0) {
|
|
/* tx fifo is full, but we can't clear it...*/
|
|
INFO (dev, "can't change configurations\n");
|
|
return -ESPIPE;
|
|
}
|
|
eth_reset_config (dev);
|
|
|
|
switch (number) {
|
|
case DEV_CONFIG_VALUE:
|
|
result = set_ether_config (dev, gfp_flags);
|
|
break;
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
case DEV_RNDIS_CONFIG_VALUE:
|
|
dev->rndis = 1;
|
|
result = set_ether_config (dev, gfp_flags);
|
|
break;
|
|
#endif
|
|
default:
|
|
result = -EINVAL;
|
|
/* FALL THROUGH */
|
|
case 0:
|
|
break;
|
|
}
|
|
|
|
if (result) {
|
|
if (number)
|
|
eth_reset_config (dev);
|
|
usb_gadget_vbus_draw(dev->gadget,
|
|
dev->gadget->is_otg ? 8 : 100);
|
|
} else {
|
|
char *speed;
|
|
unsigned power;
|
|
|
|
power = 2 * eth_config.bMaxPower;
|
|
usb_gadget_vbus_draw(dev->gadget, power);
|
|
|
|
switch (gadget->speed) {
|
|
case USB_SPEED_FULL: speed = "full"; break;
|
|
#ifdef CONFIG_USB_GADGET_DUALSPEED
|
|
case USB_SPEED_HIGH: speed = "high"; break;
|
|
#endif
|
|
default: speed = "?"; break;
|
|
}
|
|
|
|
dev->config = number;
|
|
INFO (dev, "%s speed config #%d: %d mA, %s, using %s\n",
|
|
speed, number, power, driver_desc,
|
|
rndis_active(dev)
|
|
? "RNDIS"
|
|
: (cdc_active(dev)
|
|
? "CDC Ethernet"
|
|
: "CDC Ethernet Subset"));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#ifdef DEV_CONFIG_CDC
|
|
|
|
/* The interrupt endpoint is used in CDC networking models (Ethernet, ATM)
|
|
* only to notify the host about link status changes (which we support) or
|
|
* report completion of some encapsulated command (as used in RNDIS). Since
|
|
* we want this CDC Ethernet code to be vendor-neutral, we don't use that
|
|
* command mechanism; and only one status request is ever queued.
|
|
*/
|
|
|
|
static void eth_status_complete (struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
struct usb_cdc_notification *event = req->buf;
|
|
int value = req->status;
|
|
struct eth_dev *dev = ep->driver_data;
|
|
|
|
/* issue the second notification if host reads the first */
|
|
if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION
|
|
&& value == 0) {
|
|
__le32 *data = req->buf + sizeof *event;
|
|
|
|
event->bmRequestType = 0xA1;
|
|
event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
|
|
event->wValue = __constant_cpu_to_le16 (0);
|
|
event->wIndex = __constant_cpu_to_le16 (1);
|
|
event->wLength = __constant_cpu_to_le16 (8);
|
|
|
|
/* SPEED_CHANGE data is up/down speeds in bits/sec */
|
|
data [0] = data [1] = cpu_to_le32 (BITRATE (dev->gadget));
|
|
|
|
req->length = STATUS_BYTECOUNT;
|
|
value = usb_ep_queue (ep, req, GFP_ATOMIC);
|
|
DEBUG (dev, "send SPEED_CHANGE --> %d\n", value);
|
|
if (value == 0)
|
|
return;
|
|
} else if (value != -ECONNRESET)
|
|
DEBUG (dev, "event %02x --> %d\n",
|
|
event->bNotificationType, value);
|
|
req->context = NULL;
|
|
}
|
|
|
|
static void issue_start_status (struct eth_dev *dev)
|
|
{
|
|
struct usb_request *req = dev->stat_req;
|
|
struct usb_cdc_notification *event;
|
|
int value;
|
|
|
|
DEBUG (dev, "%s, flush old status first\n", __FUNCTION__);
|
|
|
|
/* flush old status
|
|
*
|
|
* FIXME ugly idiom, maybe we'd be better with just
|
|
* a "cancel the whole queue" primitive since any
|
|
* unlink-one primitive has way too many error modes.
|
|
* here, we "know" toggle is already clear...
|
|
*
|
|
* FIXME iff req->context != null just dequeue it
|
|
*/
|
|
usb_ep_disable (dev->status_ep);
|
|
usb_ep_enable (dev->status_ep, dev->status);
|
|
|
|
/* 3.8.1 says to issue first NETWORK_CONNECTION, then
|
|
* a SPEED_CHANGE. could be useful in some configs.
|
|
*/
|
|
event = req->buf;
|
|
event->bmRequestType = 0xA1;
|
|
event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
|
|
event->wValue = __constant_cpu_to_le16 (1); /* connected */
|
|
event->wIndex = __constant_cpu_to_le16 (1);
|
|
event->wLength = 0;
|
|
|
|
req->length = sizeof *event;
|
|
req->complete = eth_status_complete;
|
|
req->context = dev;
|
|
|
|
value = usb_ep_queue (dev->status_ep, req, GFP_ATOMIC);
|
|
if (value < 0)
|
|
DEBUG (dev, "status buf queue --> %d\n", value);
|
|
}
|
|
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void eth_setup_complete (struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
if (req->status || req->actual != req->length)
|
|
DEBUG ((struct eth_dev *) ep->driver_data,
|
|
"setup complete --> %d, %d/%d\n",
|
|
req->status, req->actual, req->length);
|
|
}
|
|
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
|
|
static void rndis_response_complete (struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
if (req->status || req->actual != req->length)
|
|
DEBUG ((struct eth_dev *) ep->driver_data,
|
|
"rndis response complete --> %d, %d/%d\n",
|
|
req->status, req->actual, req->length);
|
|
|
|
/* done sending after USB_CDC_GET_ENCAPSULATED_RESPONSE */
|
|
}
|
|
|
|
static void rndis_command_complete (struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
struct eth_dev *dev = ep->driver_data;
|
|
int status;
|
|
|
|
/* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
|
|
spin_lock(&dev->lock);
|
|
status = rndis_msg_parser (dev->rndis_config, (u8 *) req->buf);
|
|
if (status < 0)
|
|
ERROR(dev, "%s: rndis parse error %d\n", __FUNCTION__, status);
|
|
spin_unlock(&dev->lock);
|
|
}
|
|
|
|
#endif /* RNDIS */
|
|
|
|
/*
|
|
* The setup() callback implements all the ep0 functionality that's not
|
|
* handled lower down. CDC has a number of less-common features:
|
|
*
|
|
* - two interfaces: control, and ethernet data
|
|
* - Ethernet data interface has two altsettings: default, and active
|
|
* - class-specific descriptors for the control interface
|
|
* - class-specific control requests
|
|
*/
|
|
static int
|
|
eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
|
|
{
|
|
struct eth_dev *dev = get_gadget_data (gadget);
|
|
struct usb_request *req = dev->req;
|
|
int value = -EOPNOTSUPP;
|
|
u16 wIndex = le16_to_cpu(ctrl->wIndex);
|
|
u16 wValue = le16_to_cpu(ctrl->wValue);
|
|
u16 wLength = le16_to_cpu(ctrl->wLength);
|
|
|
|
/* descriptors just go into the pre-allocated ep0 buffer,
|
|
* while config change events may enable network traffic.
|
|
*/
|
|
req->complete = eth_setup_complete;
|
|
switch (ctrl->bRequest) {
|
|
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
if (ctrl->bRequestType != USB_DIR_IN)
|
|
break;
|
|
switch (wValue >> 8) {
|
|
|
|
case USB_DT_DEVICE:
|
|
value = min (wLength, (u16) sizeof device_desc);
|
|
memcpy (req->buf, &device_desc, value);
|
|
break;
|
|
#ifdef CONFIG_USB_GADGET_DUALSPEED
|
|
case USB_DT_DEVICE_QUALIFIER:
|
|
if (!gadget->is_dualspeed)
|
|
break;
|
|
value = min (wLength, (u16) sizeof dev_qualifier);
|
|
memcpy (req->buf, &dev_qualifier, value);
|
|
break;
|
|
|
|
case USB_DT_OTHER_SPEED_CONFIG:
|
|
if (!gadget->is_dualspeed)
|
|
break;
|
|
// FALLTHROUGH
|
|
#endif /* CONFIG_USB_GADGET_DUALSPEED */
|
|
case USB_DT_CONFIG:
|
|
value = config_buf (gadget->speed, req->buf,
|
|
wValue >> 8,
|
|
wValue & 0xff,
|
|
gadget->is_otg);
|
|
if (value >= 0)
|
|
value = min (wLength, (u16) value);
|
|
break;
|
|
|
|
case USB_DT_STRING:
|
|
value = usb_gadget_get_string (&stringtab,
|
|
wValue & 0xff, req->buf);
|
|
if (value >= 0)
|
|
value = min (wLength, (u16) value);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
if (ctrl->bRequestType != 0)
|
|
break;
|
|
if (gadget->a_hnp_support)
|
|
DEBUG (dev, "HNP available\n");
|
|
else if (gadget->a_alt_hnp_support)
|
|
DEBUG (dev, "HNP needs a different root port\n");
|
|
spin_lock (&dev->lock);
|
|
value = eth_set_config (dev, wValue, GFP_ATOMIC);
|
|
spin_unlock (&dev->lock);
|
|
break;
|
|
case USB_REQ_GET_CONFIGURATION:
|
|
if (ctrl->bRequestType != USB_DIR_IN)
|
|
break;
|
|
*(u8 *)req->buf = dev->config;
|
|
value = min (wLength, (u16) 1);
|
|
break;
|
|
|
|
case USB_REQ_SET_INTERFACE:
|
|
if (ctrl->bRequestType != USB_RECIP_INTERFACE
|
|
|| !dev->config
|
|
|| wIndex > 1)
|
|
break;
|
|
if (!cdc_active(dev) && wIndex != 0)
|
|
break;
|
|
spin_lock (&dev->lock);
|
|
|
|
/* PXA hardware partially handles SET_INTERFACE;
|
|
* we need to kluge around that interference.
|
|
*/
|
|
if (gadget_is_pxa (gadget)) {
|
|
value = eth_set_config (dev, DEV_CONFIG_VALUE,
|
|
GFP_ATOMIC);
|
|
goto done_set_intf;
|
|
}
|
|
|
|
#ifdef DEV_CONFIG_CDC
|
|
switch (wIndex) {
|
|
case 0: /* control/master intf */
|
|
if (wValue != 0)
|
|
break;
|
|
if (dev->status) {
|
|
usb_ep_disable (dev->status_ep);
|
|
usb_ep_enable (dev->status_ep, dev->status);
|
|
}
|
|
value = 0;
|
|
break;
|
|
case 1: /* data intf */
|
|
if (wValue > 1)
|
|
break;
|
|
usb_ep_disable (dev->in_ep);
|
|
usb_ep_disable (dev->out_ep);
|
|
|
|
/* CDC requires the data transfers not be done from
|
|
* the default interface setting ... also, setting
|
|
* the non-default interface resets filters etc.
|
|
*/
|
|
if (wValue == 1) {
|
|
if (!cdc_active (dev))
|
|
break;
|
|
usb_ep_enable (dev->in_ep, dev->in);
|
|
usb_ep_enable (dev->out_ep, dev->out);
|
|
dev->cdc_filter = DEFAULT_FILTER;
|
|
netif_carrier_on (dev->net);
|
|
if (dev->status)
|
|
issue_start_status (dev);
|
|
if (netif_running (dev->net)) {
|
|
spin_unlock (&dev->lock);
|
|
eth_start (dev, GFP_ATOMIC);
|
|
spin_lock (&dev->lock);
|
|
}
|
|
} else {
|
|
netif_stop_queue (dev->net);
|
|
netif_carrier_off (dev->net);
|
|
}
|
|
value = 0;
|
|
break;
|
|
}
|
|
#else
|
|
/* FIXME this is wrong, as is the assumption that
|
|
* all non-PXA hardware talks real CDC ...
|
|
*/
|
|
dev_warn (&gadget->dev, "set_interface ignored!\n");
|
|
#endif /* DEV_CONFIG_CDC */
|
|
|
|
done_set_intf:
|
|
spin_unlock (&dev->lock);
|
|
break;
|
|
case USB_REQ_GET_INTERFACE:
|
|
if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)
|
|
|| !dev->config
|
|
|| wIndex > 1)
|
|
break;
|
|
if (!(cdc_active(dev) || rndis_active(dev)) && wIndex != 0)
|
|
break;
|
|
|
|
/* for CDC, iff carrier is on, data interface is active. */
|
|
if (rndis_active(dev) || wIndex != 1)
|
|
*(u8 *)req->buf = 0;
|
|
else
|
|
*(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0;
|
|
value = min (wLength, (u16) 1);
|
|
break;
|
|
|
|
#ifdef DEV_CONFIG_CDC
|
|
case USB_CDC_SET_ETHERNET_PACKET_FILTER:
|
|
/* see 6.2.30: no data, wIndex = interface,
|
|
* wValue = packet filter bitmap
|
|
*/
|
|
if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
|
|
|| !cdc_active(dev)
|
|
|| wLength != 0
|
|
|| wIndex > 1)
|
|
break;
|
|
DEBUG (dev, "packet filter %02x\n", wValue);
|
|
dev->cdc_filter = wValue;
|
|
value = 0;
|
|
break;
|
|
|
|
/* and potentially:
|
|
* case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
|
|
* case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
|
|
* case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
|
|
* case USB_CDC_GET_ETHERNET_STATISTIC:
|
|
*/
|
|
|
|
#endif /* DEV_CONFIG_CDC */
|
|
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
/* RNDIS uses the CDC command encapsulation mechanism to implement
|
|
* an RPC scheme, with much getting/setting of attributes by OID.
|
|
*/
|
|
case USB_CDC_SEND_ENCAPSULATED_COMMAND:
|
|
if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
|
|
|| !rndis_active(dev)
|
|
|| wLength > USB_BUFSIZ
|
|
|| wValue
|
|
|| rndis_control_intf.bInterfaceNumber
|
|
!= wIndex)
|
|
break;
|
|
/* read the request, then process it */
|
|
value = wLength;
|
|
req->complete = rndis_command_complete;
|
|
/* later, rndis_control_ack () sends a notification */
|
|
break;
|
|
|
|
case USB_CDC_GET_ENCAPSULATED_RESPONSE:
|
|
if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE)
|
|
== ctrl->bRequestType
|
|
&& rndis_active(dev)
|
|
// && wLength >= 0x0400
|
|
&& !wValue
|
|
&& rndis_control_intf.bInterfaceNumber
|
|
== wIndex) {
|
|
u8 *buf;
|
|
|
|
/* return the result */
|
|
buf = rndis_get_next_response (dev->rndis_config,
|
|
&value);
|
|
if (buf) {
|
|
memcpy (req->buf, buf, value);
|
|
req->complete = rndis_response_complete;
|
|
rndis_free_response(dev->rndis_config, buf);
|
|
}
|
|
/* else stalls ... spec says to avoid that */
|
|
}
|
|
break;
|
|
#endif /* RNDIS */
|
|
|
|
default:
|
|
VDEBUG (dev,
|
|
"unknown control req%02x.%02x v%04x i%04x l%d\n",
|
|
ctrl->bRequestType, ctrl->bRequest,
|
|
wValue, wIndex, wLength);
|
|
}
|
|
|
|
/* respond with data transfer before status phase? */
|
|
if (value >= 0) {
|
|
req->length = value;
|
|
req->zero = value < wLength
|
|
&& (value % gadget->ep0->maxpacket) == 0;
|
|
value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
|
|
if (value < 0) {
|
|
DEBUG (dev, "ep_queue --> %d\n", value);
|
|
req->status = 0;
|
|
eth_setup_complete (gadget->ep0, req);
|
|
}
|
|
}
|
|
|
|
/* host either stalls (value < 0) or reports success */
|
|
return value;
|
|
}
|
|
|
|
static void
|
|
eth_disconnect (struct usb_gadget *gadget)
|
|
{
|
|
struct eth_dev *dev = get_gadget_data (gadget);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave (&dev->lock, flags);
|
|
netif_stop_queue (dev->net);
|
|
netif_carrier_off (dev->net);
|
|
eth_reset_config (dev);
|
|
spin_unlock_irqrestore (&dev->lock, flags);
|
|
|
|
/* FIXME RNDIS should enter RNDIS_UNINITIALIZED */
|
|
|
|
/* next we may get setup() calls to enumerate new connections;
|
|
* or an unbind() during shutdown (including removing module).
|
|
*/
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* NETWORK DRIVER HOOKUP (to the layer above this driver) */
|
|
|
|
static int eth_change_mtu (struct net_device *net, int new_mtu)
|
|
{
|
|
struct eth_dev *dev = netdev_priv(net);
|
|
|
|
if (dev->rndis)
|
|
return -EBUSY;
|
|
|
|
if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
|
|
return -ERANGE;
|
|
/* no zero-length packet read wanted after mtu-sized packets */
|
|
if (((new_mtu + sizeof (struct ethhdr)) % dev->in_ep->maxpacket) == 0)
|
|
return -EDOM;
|
|
net->mtu = new_mtu;
|
|
return 0;
|
|
}
|
|
|
|
static struct net_device_stats *eth_get_stats (struct net_device *net)
|
|
{
|
|
return &((struct eth_dev *)netdev_priv(net))->stats;
|
|
}
|
|
|
|
static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
|
|
{
|
|
struct eth_dev *dev = netdev_priv(net);
|
|
strlcpy(p->driver, shortname, sizeof p->driver);
|
|
strlcpy(p->version, DRIVER_VERSION, sizeof p->version);
|
|
strlcpy(p->fw_version, dev->gadget->name, sizeof p->fw_version);
|
|
strlcpy (p->bus_info, dev->gadget->dev.bus_id, sizeof p->bus_info);
|
|
}
|
|
|
|
static u32 eth_get_link(struct net_device *net)
|
|
{
|
|
struct eth_dev *dev = netdev_priv(net);
|
|
return dev->gadget->speed != USB_SPEED_UNKNOWN;
|
|
}
|
|
|
|
static struct ethtool_ops ops = {
|
|
.get_drvinfo = eth_get_drvinfo,
|
|
.get_link = eth_get_link
|
|
};
|
|
|
|
static void defer_kevent (struct eth_dev *dev, int flag)
|
|
{
|
|
if (test_and_set_bit (flag, &dev->todo))
|
|
return;
|
|
if (!schedule_work (&dev->work))
|
|
ERROR (dev, "kevent %d may have been dropped\n", flag);
|
|
else
|
|
DEBUG (dev, "kevent %d scheduled\n", flag);
|
|
}
|
|
|
|
static void rx_complete (struct usb_ep *ep, struct usb_request *req);
|
|
|
|
static int
|
|
rx_submit (struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
|
|
{
|
|
struct sk_buff *skb;
|
|
int retval = -ENOMEM;
|
|
size_t size;
|
|
|
|
/* Padding up to RX_EXTRA handles minor disagreements with host.
|
|
* Normally we use the USB "terminate on short read" convention;
|
|
* so allow up to (N*maxpacket), since that memory is normally
|
|
* already allocated. Some hardware doesn't deal well with short
|
|
* reads (e.g. DMA must be N*maxpacket), so for now don't trim a
|
|
* byte off the end (to force hardware errors on overflow).
|
|
*
|
|
* RNDIS uses internal framing, and explicitly allows senders to
|
|
* pad to end-of-packet. That's potentially nice for speed,
|
|
* but means receivers can't recover synch on their own.
|
|
*/
|
|
size = (sizeof (struct ethhdr) + dev->net->mtu + RX_EXTRA);
|
|
size += dev->out_ep->maxpacket - 1;
|
|
if (rndis_active(dev))
|
|
size += sizeof (struct rndis_packet_msg_type);
|
|
size -= size % dev->out_ep->maxpacket;
|
|
|
|
if ((skb = alloc_skb (size + NET_IP_ALIGN, gfp_flags)) == 0) {
|
|
DEBUG (dev, "no rx skb\n");
|
|
goto enomem;
|
|
}
|
|
|
|
/* Some platforms perform better when IP packets are aligned,
|
|
* but on at least one, checksumming fails otherwise. Note:
|
|
* RNDIS headers involve variable numbers of LE32 values.
|
|
*/
|
|
skb_reserve(skb, NET_IP_ALIGN);
|
|
|
|
req->buf = skb->data;
|
|
req->length = size;
|
|
req->complete = rx_complete;
|
|
req->context = skb;
|
|
|
|
retval = usb_ep_queue (dev->out_ep, req, gfp_flags);
|
|
if (retval == -ENOMEM)
|
|
enomem:
|
|
defer_kevent (dev, WORK_RX_MEMORY);
|
|
if (retval) {
|
|
DEBUG (dev, "rx submit --> %d\n", retval);
|
|
if (skb)
|
|
dev_kfree_skb_any(skb);
|
|
spin_lock(&dev->req_lock);
|
|
list_add (&req->list, &dev->rx_reqs);
|
|
spin_unlock(&dev->req_lock);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static void rx_complete (struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
struct sk_buff *skb = req->context;
|
|
struct eth_dev *dev = ep->driver_data;
|
|
int status = req->status;
|
|
|
|
switch (status) {
|
|
|
|
/* normal completion */
|
|
case 0:
|
|
skb_put (skb, req->actual);
|
|
/* we know MaxPacketsPerTransfer == 1 here */
|
|
if (rndis_active(dev))
|
|
status = rndis_rm_hdr (skb);
|
|
if (status < 0
|
|
|| ETH_HLEN > skb->len
|
|
|| skb->len > ETH_FRAME_LEN) {
|
|
dev->stats.rx_errors++;
|
|
dev->stats.rx_length_errors++;
|
|
DEBUG (dev, "rx length %d\n", skb->len);
|
|
break;
|
|
}
|
|
|
|
skb->protocol = eth_type_trans (skb, dev->net);
|
|
dev->stats.rx_packets++;
|
|
dev->stats.rx_bytes += skb->len;
|
|
|
|
/* no buffer copies needed, unless hardware can't
|
|
* use skb buffers.
|
|
*/
|
|
status = netif_rx (skb);
|
|
skb = NULL;
|
|
break;
|
|
|
|
/* software-driven interface shutdown */
|
|
case -ECONNRESET: // unlink
|
|
case -ESHUTDOWN: // disconnect etc
|
|
VDEBUG (dev, "rx shutdown, code %d\n", status);
|
|
goto quiesce;
|
|
|
|
/* for hardware automagic (such as pxa) */
|
|
case -ECONNABORTED: // endpoint reset
|
|
DEBUG (dev, "rx %s reset\n", ep->name);
|
|
defer_kevent (dev, WORK_RX_MEMORY);
|
|
quiesce:
|
|
dev_kfree_skb_any (skb);
|
|
goto clean;
|
|
|
|
/* data overrun */
|
|
case -EOVERFLOW:
|
|
dev->stats.rx_over_errors++;
|
|
// FALLTHROUGH
|
|
|
|
default:
|
|
dev->stats.rx_errors++;
|
|
DEBUG (dev, "rx status %d\n", status);
|
|
break;
|
|
}
|
|
|
|
if (skb)
|
|
dev_kfree_skb_any (skb);
|
|
if (!netif_running (dev->net)) {
|
|
clean:
|
|
spin_lock(&dev->req_lock);
|
|
list_add (&req->list, &dev->rx_reqs);
|
|
spin_unlock(&dev->req_lock);
|
|
req = NULL;
|
|
}
|
|
if (req)
|
|
rx_submit (dev, req, GFP_ATOMIC);
|
|
}
|
|
|
|
static int prealloc (struct list_head *list, struct usb_ep *ep,
|
|
unsigned n, gfp_t gfp_flags)
|
|
{
|
|
unsigned i;
|
|
struct usb_request *req;
|
|
|
|
if (!n)
|
|
return -ENOMEM;
|
|
|
|
/* queue/recycle up to N requests */
|
|
i = n;
|
|
list_for_each_entry (req, list, list) {
|
|
if (i-- == 0)
|
|
goto extra;
|
|
}
|
|
while (i--) {
|
|
req = usb_ep_alloc_request (ep, gfp_flags);
|
|
if (!req)
|
|
return list_empty (list) ? -ENOMEM : 0;
|
|
list_add (&req->list, list);
|
|
}
|
|
return 0;
|
|
|
|
extra:
|
|
/* free extras */
|
|
for (;;) {
|
|
struct list_head *next;
|
|
|
|
next = req->list.next;
|
|
list_del (&req->list);
|
|
usb_ep_free_request (ep, req);
|
|
|
|
if (next == list)
|
|
break;
|
|
|
|
req = container_of (next, struct usb_request, list);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags)
|
|
{
|
|
int status;
|
|
|
|
spin_lock(&dev->req_lock);
|
|
status = prealloc (&dev->tx_reqs, dev->in_ep, n, gfp_flags);
|
|
if (status < 0)
|
|
goto fail;
|
|
status = prealloc (&dev->rx_reqs, dev->out_ep, n, gfp_flags);
|
|
if (status < 0)
|
|
goto fail;
|
|
goto done;
|
|
fail:
|
|
DEBUG (dev, "can't alloc requests\n");
|
|
done:
|
|
spin_unlock(&dev->req_lock);
|
|
return status;
|
|
}
|
|
|
|
static void rx_fill (struct eth_dev *dev, gfp_t gfp_flags)
|
|
{
|
|
struct usb_request *req;
|
|
unsigned long flags;
|
|
|
|
/* fill unused rxq slots with some skb */
|
|
spin_lock_irqsave(&dev->req_lock, flags);
|
|
while (!list_empty (&dev->rx_reqs)) {
|
|
req = container_of (dev->rx_reqs.next,
|
|
struct usb_request, list);
|
|
list_del_init (&req->list);
|
|
spin_unlock_irqrestore(&dev->req_lock, flags);
|
|
|
|
if (rx_submit (dev, req, gfp_flags) < 0) {
|
|
defer_kevent (dev, WORK_RX_MEMORY);
|
|
return;
|
|
}
|
|
|
|
spin_lock_irqsave(&dev->req_lock, flags);
|
|
}
|
|
spin_unlock_irqrestore(&dev->req_lock, flags);
|
|
}
|
|
|
|
static void eth_work (struct work_struct *work)
|
|
{
|
|
struct eth_dev *dev = container_of(work, struct eth_dev, work);
|
|
|
|
if (test_and_clear_bit (WORK_RX_MEMORY, &dev->todo)) {
|
|
if (netif_running (dev->net))
|
|
rx_fill (dev, GFP_KERNEL);
|
|
}
|
|
|
|
if (dev->todo)
|
|
DEBUG (dev, "work done, flags = 0x%lx\n", dev->todo);
|
|
}
|
|
|
|
static void tx_complete (struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
struct sk_buff *skb = req->context;
|
|
struct eth_dev *dev = ep->driver_data;
|
|
|
|
switch (req->status) {
|
|
default:
|
|
dev->stats.tx_errors++;
|
|
VDEBUG (dev, "tx err %d\n", req->status);
|
|
/* FALLTHROUGH */
|
|
case -ECONNRESET: // unlink
|
|
case -ESHUTDOWN: // disconnect etc
|
|
break;
|
|
case 0:
|
|
dev->stats.tx_bytes += skb->len;
|
|
}
|
|
dev->stats.tx_packets++;
|
|
|
|
spin_lock(&dev->req_lock);
|
|
list_add (&req->list, &dev->tx_reqs);
|
|
spin_unlock(&dev->req_lock);
|
|
dev_kfree_skb_any (skb);
|
|
|
|
atomic_dec (&dev->tx_qlen);
|
|
if (netif_carrier_ok (dev->net))
|
|
netif_wake_queue (dev->net);
|
|
}
|
|
|
|
static inline int eth_is_promisc (struct eth_dev *dev)
|
|
{
|
|
/* no filters for the CDC subset; always promisc */
|
|
if (subset_active (dev))
|
|
return 1;
|
|
return dev->cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
|
|
}
|
|
|
|
static int eth_start_xmit (struct sk_buff *skb, struct net_device *net)
|
|
{
|
|
struct eth_dev *dev = netdev_priv(net);
|
|
int length = skb->len;
|
|
int retval;
|
|
struct usb_request *req = NULL;
|
|
unsigned long flags;
|
|
|
|
/* apply outgoing CDC or RNDIS filters */
|
|
if (!eth_is_promisc (dev)) {
|
|
u8 *dest = skb->data;
|
|
|
|
if (is_multicast_ether_addr(dest)) {
|
|
u16 type;
|
|
|
|
/* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
|
|
* SET_ETHERNET_MULTICAST_FILTERS requests
|
|
*/
|
|
if (is_broadcast_ether_addr(dest))
|
|
type = USB_CDC_PACKET_TYPE_BROADCAST;
|
|
else
|
|
type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
|
|
if (!(dev->cdc_filter & type)) {
|
|
dev_kfree_skb_any (skb);
|
|
return 0;
|
|
}
|
|
}
|
|
/* ignores USB_CDC_PACKET_TYPE_DIRECTED */
|
|
}
|
|
|
|
spin_lock_irqsave(&dev->req_lock, flags);
|
|
req = container_of (dev->tx_reqs.next, struct usb_request, list);
|
|
list_del (&req->list);
|
|
if (list_empty (&dev->tx_reqs))
|
|
netif_stop_queue (net);
|
|
spin_unlock_irqrestore(&dev->req_lock, flags);
|
|
|
|
/* no buffer copies needed, unless the network stack did it
|
|
* or the hardware can't use skb buffers.
|
|
* or there's not enough space for any RNDIS headers we need
|
|
*/
|
|
if (rndis_active(dev)) {
|
|
struct sk_buff *skb_rndis;
|
|
|
|
skb_rndis = skb_realloc_headroom (skb,
|
|
sizeof (struct rndis_packet_msg_type));
|
|
if (!skb_rndis)
|
|
goto drop;
|
|
|
|
dev_kfree_skb_any (skb);
|
|
skb = skb_rndis;
|
|
rndis_add_hdr (skb);
|
|
length = skb->len;
|
|
}
|
|
req->buf = skb->data;
|
|
req->context = skb;
|
|
req->complete = tx_complete;
|
|
|
|
/* use zlp framing on tx for strict CDC-Ether conformance,
|
|
* though any robust network rx path ignores extra padding.
|
|
* and some hardware doesn't like to write zlps.
|
|
*/
|
|
req->zero = 1;
|
|
if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0)
|
|
length++;
|
|
|
|
req->length = length;
|
|
|
|
#ifdef CONFIG_USB_GADGET_DUALSPEED
|
|
/* throttle highspeed IRQ rate back slightly */
|
|
req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
|
|
? ((atomic_read (&dev->tx_qlen) % TX_DELAY) != 0)
|
|
: 0;
|
|
#endif
|
|
|
|
retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
|
|
switch (retval) {
|
|
default:
|
|
DEBUG (dev, "tx queue err %d\n", retval);
|
|
break;
|
|
case 0:
|
|
net->trans_start = jiffies;
|
|
atomic_inc (&dev->tx_qlen);
|
|
}
|
|
|
|
if (retval) {
|
|
drop:
|
|
dev->stats.tx_dropped++;
|
|
dev_kfree_skb_any (skb);
|
|
spin_lock_irqsave(&dev->req_lock, flags);
|
|
if (list_empty (&dev->tx_reqs))
|
|
netif_start_queue (net);
|
|
list_add (&req->list, &dev->tx_reqs);
|
|
spin_unlock_irqrestore(&dev->req_lock, flags);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
|
|
/* The interrupt endpoint is used in RNDIS to notify the host when messages
|
|
* other than data packets are available ... notably the REMOTE_NDIS_*_CMPLT
|
|
* messages, but also REMOTE_NDIS_INDICATE_STATUS_MSG and potentially even
|
|
* REMOTE_NDIS_KEEPALIVE_MSG.
|
|
*
|
|
* The RNDIS control queue is processed by GET_ENCAPSULATED_RESPONSE, and
|
|
* normally just one notification will be queued.
|
|
*/
|
|
|
|
static struct usb_request *eth_req_alloc (struct usb_ep *, unsigned, gfp_t);
|
|
static void eth_req_free (struct usb_ep *ep, struct usb_request *req);
|
|
|
|
static void
|
|
rndis_control_ack_complete (struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
struct eth_dev *dev = ep->driver_data;
|
|
|
|
if (req->status || req->actual != req->length)
|
|
DEBUG (dev,
|
|
"rndis control ack complete --> %d, %d/%d\n",
|
|
req->status, req->actual, req->length);
|
|
req->context = NULL;
|
|
|
|
if (req != dev->stat_req)
|
|
eth_req_free(ep, req);
|
|
}
|
|
|
|
static int rndis_control_ack (struct net_device *net)
|
|
{
|
|
struct eth_dev *dev = netdev_priv(net);
|
|
int length;
|
|
struct usb_request *resp = dev->stat_req;
|
|
|
|
/* in case RNDIS calls this after disconnect */
|
|
if (!dev->status) {
|
|
DEBUG (dev, "status ENODEV\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* in case queue length > 1 */
|
|
if (resp->context) {
|
|
resp = eth_req_alloc (dev->status_ep, 8, GFP_ATOMIC);
|
|
if (!resp)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Send RNDIS RESPONSE_AVAILABLE notification;
|
|
* USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too
|
|
*/
|
|
resp->length = 8;
|
|
resp->complete = rndis_control_ack_complete;
|
|
resp->context = dev;
|
|
|
|
*((__le32 *) resp->buf) = __constant_cpu_to_le32 (1);
|
|
*((__le32 *) resp->buf + 1) = __constant_cpu_to_le32 (0);
|
|
|
|
length = usb_ep_queue (dev->status_ep, resp, GFP_ATOMIC);
|
|
if (length < 0) {
|
|
resp->status = 0;
|
|
rndis_control_ack_complete (dev->status_ep, resp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
#define rndis_control_ack NULL
|
|
|
|
#endif /* RNDIS */
|
|
|
|
static void eth_start (struct eth_dev *dev, gfp_t gfp_flags)
|
|
{
|
|
DEBUG (dev, "%s\n", __FUNCTION__);
|
|
|
|
/* fill the rx queue */
|
|
rx_fill (dev, gfp_flags);
|
|
|
|
/* and open the tx floodgates */
|
|
atomic_set (&dev->tx_qlen, 0);
|
|
netif_wake_queue (dev->net);
|
|
if (rndis_active(dev)) {
|
|
rndis_set_param_medium (dev->rndis_config,
|
|
NDIS_MEDIUM_802_3,
|
|
BITRATE(dev->gadget)/100);
|
|
(void) rndis_signal_connect (dev->rndis_config);
|
|
}
|
|
}
|
|
|
|
static int eth_open (struct net_device *net)
|
|
{
|
|
struct eth_dev *dev = netdev_priv(net);
|
|
|
|
DEBUG (dev, "%s\n", __FUNCTION__);
|
|
if (netif_carrier_ok (dev->net))
|
|
eth_start (dev, GFP_KERNEL);
|
|
return 0;
|
|
}
|
|
|
|
static int eth_stop (struct net_device *net)
|
|
{
|
|
struct eth_dev *dev = netdev_priv(net);
|
|
|
|
VDEBUG (dev, "%s\n", __FUNCTION__);
|
|
netif_stop_queue (net);
|
|
|
|
DEBUG (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n",
|
|
dev->stats.rx_packets, dev->stats.tx_packets,
|
|
dev->stats.rx_errors, dev->stats.tx_errors
|
|
);
|
|
|
|
/* ensure there are no more active requests */
|
|
if (dev->config) {
|
|
usb_ep_disable (dev->in_ep);
|
|
usb_ep_disable (dev->out_ep);
|
|
if (netif_carrier_ok (dev->net)) {
|
|
DEBUG (dev, "host still using in/out endpoints\n");
|
|
// FIXME idiom may leave toggle wrong here
|
|
usb_ep_enable (dev->in_ep, dev->in);
|
|
usb_ep_enable (dev->out_ep, dev->out);
|
|
}
|
|
if (dev->status_ep) {
|
|
usb_ep_disable (dev->status_ep);
|
|
usb_ep_enable (dev->status_ep, dev->status);
|
|
}
|
|
}
|
|
|
|
if (rndis_active(dev)) {
|
|
rndis_set_param_medium (dev->rndis_config,
|
|
NDIS_MEDIUM_802_3, 0);
|
|
(void) rndis_signal_disconnect (dev->rndis_config);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static struct usb_request *
|
|
eth_req_alloc (struct usb_ep *ep, unsigned size, gfp_t gfp_flags)
|
|
{
|
|
struct usb_request *req;
|
|
|
|
req = usb_ep_alloc_request (ep, gfp_flags);
|
|
if (!req)
|
|
return NULL;
|
|
|
|
req->buf = kmalloc (size, gfp_flags);
|
|
if (!req->buf) {
|
|
usb_ep_free_request (ep, req);
|
|
req = NULL;
|
|
}
|
|
return req;
|
|
}
|
|
|
|
static void
|
|
eth_req_free (struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
kfree (req->buf);
|
|
usb_ep_free_request (ep, req);
|
|
}
|
|
|
|
|
|
static void /* __init_or_exit */
|
|
eth_unbind (struct usb_gadget *gadget)
|
|
{
|
|
struct eth_dev *dev = get_gadget_data (gadget);
|
|
|
|
DEBUG (dev, "unbind\n");
|
|
rndis_deregister (dev->rndis_config);
|
|
rndis_exit ();
|
|
|
|
/* we've already been disconnected ... no i/o is active */
|
|
if (dev->req) {
|
|
eth_req_free (gadget->ep0, dev->req);
|
|
dev->req = NULL;
|
|
}
|
|
if (dev->stat_req) {
|
|
eth_req_free (dev->status_ep, dev->stat_req);
|
|
dev->stat_req = NULL;
|
|
}
|
|
|
|
unregister_netdev (dev->net);
|
|
free_netdev(dev->net);
|
|
|
|
/* assuming we used keventd, it must quiesce too */
|
|
flush_scheduled_work ();
|
|
set_gadget_data (gadget, NULL);
|
|
}
|
|
|
|
static u8 __devinit nibble (unsigned char c)
|
|
{
|
|
if (likely (isdigit (c)))
|
|
return c - '0';
|
|
c = toupper (c);
|
|
if (likely (isxdigit (c)))
|
|
return 10 + c - 'A';
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit get_ether_addr(const char *str, u8 *dev_addr)
|
|
{
|
|
if (str) {
|
|
unsigned i;
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
unsigned char num;
|
|
|
|
if((*str == '.') || (*str == ':'))
|
|
str++;
|
|
num = nibble(*str++) << 4;
|
|
num |= (nibble(*str++));
|
|
dev_addr [i] = num;
|
|
}
|
|
if (is_valid_ether_addr (dev_addr))
|
|
return 0;
|
|
}
|
|
random_ether_addr(dev_addr);
|
|
return 1;
|
|
}
|
|
|
|
static int __devinit
|
|
eth_bind (struct usb_gadget *gadget)
|
|
{
|
|
struct eth_dev *dev;
|
|
struct net_device *net;
|
|
u8 cdc = 1, zlp = 1, rndis = 1;
|
|
struct usb_ep *in_ep, *out_ep, *status_ep = NULL;
|
|
int status = -ENOMEM;
|
|
int gcnum;
|
|
|
|
/* these flags are only ever cleared; compiler take note */
|
|
#ifndef DEV_CONFIG_CDC
|
|
cdc = 0;
|
|
#endif
|
|
#ifndef CONFIG_USB_ETH_RNDIS
|
|
rndis = 0;
|
|
#endif
|
|
|
|
/* Because most host side USB stacks handle CDC Ethernet, that
|
|
* standard protocol is _strongly_ preferred for interop purposes.
|
|
* (By everyone except Microsoft.)
|
|
*/
|
|
if (gadget_is_pxa (gadget)) {
|
|
/* pxa doesn't support altsettings */
|
|
cdc = 0;
|
|
} else if (gadget_is_musbhdrc(gadget)) {
|
|
/* reduce tx dma overhead by avoiding special cases */
|
|
zlp = 0;
|
|
} else if (gadget_is_sh(gadget)) {
|
|
/* sh doesn't support multiple interfaces or configs */
|
|
cdc = 0;
|
|
rndis = 0;
|
|
} else if (gadget_is_sa1100 (gadget)) {
|
|
/* hardware can't write zlps */
|
|
zlp = 0;
|
|
/* sa1100 CAN do CDC, without status endpoint ... we use
|
|
* non-CDC to be compatible with ARM Linux-2.4 "usb-eth".
|
|
*/
|
|
cdc = 0;
|
|
}
|
|
|
|
gcnum = usb_gadget_controller_number (gadget);
|
|
if (gcnum >= 0)
|
|
device_desc.bcdDevice = cpu_to_le16 (0x0200 + gcnum);
|
|
else {
|
|
/* can't assume CDC works. don't want to default to
|
|
* anything less functional on CDC-capable hardware,
|
|
* so we fail in this case.
|
|
*/
|
|
dev_err (&gadget->dev,
|
|
"controller '%s' not recognized\n",
|
|
gadget->name);
|
|
return -ENODEV;
|
|
}
|
|
snprintf (manufacturer, sizeof manufacturer, "%s %s/%s",
|
|
init_utsname()->sysname, init_utsname()->release,
|
|
gadget->name);
|
|
|
|
/* If there's an RNDIS configuration, that's what Windows wants to
|
|
* be using ... so use these product IDs here and in the "linux.inf"
|
|
* needed to install MSFT drivers. Current Linux kernels will use
|
|
* the second configuration if it's CDC Ethernet, and need some help
|
|
* to choose the right configuration otherwise.
|
|
*/
|
|
if (rndis) {
|
|
device_desc.idVendor =
|
|
__constant_cpu_to_le16(RNDIS_VENDOR_NUM);
|
|
device_desc.idProduct =
|
|
__constant_cpu_to_le16(RNDIS_PRODUCT_NUM);
|
|
snprintf (product_desc, sizeof product_desc,
|
|
"RNDIS/%s", driver_desc);
|
|
|
|
/* CDC subset ... recognized by Linux since 2.4.10, but Windows
|
|
* drivers aren't widely available. (That may be improved by
|
|
* supporting one submode of the "SAFE" variant of MDLM.)
|
|
*/
|
|
} else if (!cdc) {
|
|
device_desc.idVendor =
|
|
__constant_cpu_to_le16(SIMPLE_VENDOR_NUM);
|
|
device_desc.idProduct =
|
|
__constant_cpu_to_le16(SIMPLE_PRODUCT_NUM);
|
|
}
|
|
|
|
/* support optional vendor/distro customization */
|
|
if (idVendor) {
|
|
if (!idProduct) {
|
|
dev_err (&gadget->dev, "idVendor needs idProduct!\n");
|
|
return -ENODEV;
|
|
}
|
|
device_desc.idVendor = cpu_to_le16(idVendor);
|
|
device_desc.idProduct = cpu_to_le16(idProduct);
|
|
if (bcdDevice)
|
|
device_desc.bcdDevice = cpu_to_le16(bcdDevice);
|
|
}
|
|
if (iManufacturer)
|
|
strlcpy (manufacturer, iManufacturer, sizeof manufacturer);
|
|
if (iProduct)
|
|
strlcpy (product_desc, iProduct, sizeof product_desc);
|
|
if (iSerialNumber) {
|
|
device_desc.iSerialNumber = STRING_SERIALNUMBER,
|
|
strlcpy(serial_number, iSerialNumber, sizeof serial_number);
|
|
}
|
|
|
|
/* all we really need is bulk IN/OUT */
|
|
usb_ep_autoconfig_reset (gadget);
|
|
in_ep = usb_ep_autoconfig (gadget, &fs_source_desc);
|
|
if (!in_ep) {
|
|
autoconf_fail:
|
|
dev_err (&gadget->dev,
|
|
"can't autoconfigure on %s\n",
|
|
gadget->name);
|
|
return -ENODEV;
|
|
}
|
|
in_ep->driver_data = in_ep; /* claim */
|
|
|
|
out_ep = usb_ep_autoconfig (gadget, &fs_sink_desc);
|
|
if (!out_ep)
|
|
goto autoconf_fail;
|
|
out_ep->driver_data = out_ep; /* claim */
|
|
|
|
#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
|
|
/* CDC Ethernet control interface doesn't require a status endpoint.
|
|
* Since some hosts expect one, try to allocate one anyway.
|
|
*/
|
|
if (cdc || rndis) {
|
|
status_ep = usb_ep_autoconfig (gadget, &fs_status_desc);
|
|
if (status_ep) {
|
|
status_ep->driver_data = status_ep; /* claim */
|
|
} else if (rndis) {
|
|
dev_err (&gadget->dev,
|
|
"can't run RNDIS on %s\n",
|
|
gadget->name);
|
|
return -ENODEV;
|
|
#ifdef DEV_CONFIG_CDC
|
|
/* pxa25x only does CDC subset; often used with RNDIS */
|
|
} else if (cdc) {
|
|
control_intf.bNumEndpoints = 0;
|
|
/* FIXME remove endpoint from descriptor list */
|
|
#endif
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* one config: cdc, else minimal subset */
|
|
if (!cdc) {
|
|
eth_config.bNumInterfaces = 1;
|
|
eth_config.iConfiguration = STRING_SUBSET;
|
|
|
|
/* use functions to set these up, in case we're built to work
|
|
* with multiple controllers and must override CDC Ethernet.
|
|
*/
|
|
fs_subset_descriptors();
|
|
hs_subset_descriptors();
|
|
}
|
|
|
|
device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
|
|
usb_gadget_set_selfpowered (gadget);
|
|
|
|
/* For now RNDIS is always a second config */
|
|
if (rndis)
|
|
device_desc.bNumConfigurations = 2;
|
|
|
|
#ifdef CONFIG_USB_GADGET_DUALSPEED
|
|
if (rndis)
|
|
dev_qualifier.bNumConfigurations = 2;
|
|
else if (!cdc)
|
|
dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC;
|
|
|
|
/* assumes ep0 uses the same value for both speeds ... */
|
|
dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
|
|
|
|
/* and that all endpoints are dual-speed */
|
|
hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
|
|
hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
|
|
#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
|
|
if (status_ep)
|
|
hs_status_desc.bEndpointAddress =
|
|
fs_status_desc.bEndpointAddress;
|
|
#endif
|
|
#endif /* DUALSPEED */
|
|
|
|
if (gadget->is_otg) {
|
|
otg_descriptor.bmAttributes |= USB_OTG_HNP,
|
|
eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
|
|
eth_config.bMaxPower = 4;
|
|
#ifdef CONFIG_USB_ETH_RNDIS
|
|
rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
|
|
rndis_config.bMaxPower = 4;
|
|
#endif
|
|
}
|
|
|
|
net = alloc_etherdev (sizeof *dev);
|
|
if (!net)
|
|
return status;
|
|
dev = netdev_priv(net);
|
|
spin_lock_init (&dev->lock);
|
|
spin_lock_init (&dev->req_lock);
|
|
INIT_WORK (&dev->work, eth_work);
|
|
INIT_LIST_HEAD (&dev->tx_reqs);
|
|
INIT_LIST_HEAD (&dev->rx_reqs);
|
|
|
|
/* network device setup */
|
|
dev->net = net;
|
|
SET_MODULE_OWNER (net);
|
|
strcpy (net->name, "usb%d");
|
|
dev->cdc = cdc;
|
|
dev->zlp = zlp;
|
|
|
|
dev->in_ep = in_ep;
|
|
dev->out_ep = out_ep;
|
|
dev->status_ep = status_ep;
|
|
|
|
/* Module params for these addresses should come from ID proms.
|
|
* The host side address is used with CDC and RNDIS, and commonly
|
|
* ends up in a persistent config database. It's not clear if
|
|
* host side code for the SAFE thing cares -- its original BLAN
|
|
* thing didn't, Sharp never assigned those addresses on Zaurii.
|
|
*/
|
|
if (get_ether_addr(dev_addr, net->dev_addr))
|
|
dev_warn(&gadget->dev,
|
|
"using random %s ethernet address\n", "self");
|
|
if (get_ether_addr(host_addr, dev->host_mac))
|
|
dev_warn(&gadget->dev,
|
|
"using random %s ethernet address\n", "host");
|
|
snprintf (ethaddr, sizeof ethaddr, "%02X%02X%02X%02X%02X%02X",
|
|
dev->host_mac [0], dev->host_mac [1],
|
|
dev->host_mac [2], dev->host_mac [3],
|
|
dev->host_mac [4], dev->host_mac [5]);
|
|
|
|
if (rndis) {
|
|
status = rndis_init();
|
|
if (status < 0) {
|
|
dev_err (&gadget->dev, "can't init RNDIS, %d\n",
|
|
status);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
net->change_mtu = eth_change_mtu;
|
|
net->get_stats = eth_get_stats;
|
|
net->hard_start_xmit = eth_start_xmit;
|
|
net->open = eth_open;
|
|
net->stop = eth_stop;
|
|
// watchdog_timeo, tx_timeout ...
|
|
// set_multicast_list
|
|
SET_ETHTOOL_OPS(net, &ops);
|
|
|
|
/* preallocate control message data and buffer */
|
|
dev->req = eth_req_alloc (gadget->ep0, USB_BUFSIZ, GFP_KERNEL);
|
|
if (!dev->req)
|
|
goto fail;
|
|
dev->req->complete = eth_setup_complete;
|
|
|
|
/* ... and maybe likewise for status transfer */
|
|
#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
|
|
if (dev->status_ep) {
|
|
dev->stat_req = eth_req_alloc (dev->status_ep,
|
|
STATUS_BYTECOUNT, GFP_KERNEL);
|
|
if (!dev->stat_req) {
|
|
eth_req_free (gadget->ep0, dev->req);
|
|
goto fail;
|
|
}
|
|
dev->stat_req->context = NULL;
|
|
}
|
|
#endif
|
|
|
|
/* finish hookup to lower layer ... */
|
|
dev->gadget = gadget;
|
|
set_gadget_data (gadget, dev);
|
|
gadget->ep0->driver_data = dev;
|
|
|
|
/* two kinds of host-initiated state changes:
|
|
* - iff DATA transfer is active, carrier is "on"
|
|
* - tx queueing enabled if open *and* carrier is "on"
|
|
*/
|
|
netif_stop_queue (dev->net);
|
|
netif_carrier_off (dev->net);
|
|
|
|
SET_NETDEV_DEV (dev->net, &gadget->dev);
|
|
status = register_netdev (dev->net);
|
|
if (status < 0)
|
|
goto fail1;
|
|
|
|
INFO (dev, "%s, version: " DRIVER_VERSION "\n", driver_desc);
|
|
INFO (dev, "using %s, OUT %s IN %s%s%s\n", gadget->name,
|
|
out_ep->name, in_ep->name,
|
|
status_ep ? " STATUS " : "",
|
|
status_ep ? status_ep->name : ""
|
|
);
|
|
INFO (dev, "MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
net->dev_addr [0], net->dev_addr [1],
|
|
net->dev_addr [2], net->dev_addr [3],
|
|
net->dev_addr [4], net->dev_addr [5]);
|
|
|
|
if (cdc || rndis)
|
|
INFO (dev, "HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
dev->host_mac [0], dev->host_mac [1],
|
|
dev->host_mac [2], dev->host_mac [3],
|
|
dev->host_mac [4], dev->host_mac [5]);
|
|
|
|
if (rndis) {
|
|
u32 vendorID = 0;
|
|
|
|
/* FIXME RNDIS vendor id == "vendor NIC code" == ? */
|
|
|
|
dev->rndis_config = rndis_register (rndis_control_ack);
|
|
if (dev->rndis_config < 0) {
|
|
fail0:
|
|
unregister_netdev (dev->net);
|
|
status = -ENODEV;
|
|
goto fail;
|
|
}
|
|
|
|
/* these set up a lot of the OIDs that RNDIS needs */
|
|
rndis_set_host_mac (dev->rndis_config, dev->host_mac);
|
|
if (rndis_set_param_dev (dev->rndis_config, dev->net,
|
|
&dev->stats, &dev->cdc_filter))
|
|
goto fail0;
|
|
if (rndis_set_param_vendor (dev->rndis_config, vendorID,
|
|
manufacturer))
|
|
goto fail0;
|
|
if (rndis_set_param_medium (dev->rndis_config,
|
|
NDIS_MEDIUM_802_3,
|
|
0))
|
|
goto fail0;
|
|
INFO (dev, "RNDIS ready\n");
|
|
}
|
|
|
|
return status;
|
|
|
|
fail1:
|
|
dev_dbg(&gadget->dev, "register_netdev failed, %d\n", status);
|
|
fail:
|
|
eth_unbind (gadget);
|
|
return status;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
eth_suspend (struct usb_gadget *gadget)
|
|
{
|
|
struct eth_dev *dev = get_gadget_data (gadget);
|
|
|
|
DEBUG (dev, "suspend\n");
|
|
dev->suspended = 1;
|
|
}
|
|
|
|
static void
|
|
eth_resume (struct usb_gadget *gadget)
|
|
{
|
|
struct eth_dev *dev = get_gadget_data (gadget);
|
|
|
|
DEBUG (dev, "resume\n");
|
|
dev->suspended = 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static struct usb_gadget_driver eth_driver = {
|
|
.speed = DEVSPEED,
|
|
|
|
.function = (char *) driver_desc,
|
|
.bind = eth_bind,
|
|
.unbind = eth_unbind,
|
|
|
|
.setup = eth_setup,
|
|
.disconnect = eth_disconnect,
|
|
|
|
.suspend = eth_suspend,
|
|
.resume = eth_resume,
|
|
|
|
.driver = {
|
|
.name = (char *) shortname,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
MODULE_DESCRIPTION (DRIVER_DESC);
|
|
MODULE_AUTHOR ("David Brownell, Benedikt Spanger");
|
|
MODULE_LICENSE ("GPL");
|
|
|
|
|
|
static int __init init (void)
|
|
{
|
|
return usb_gadget_register_driver (ð_driver);
|
|
}
|
|
module_init (init);
|
|
|
|
static void __exit cleanup (void)
|
|
{
|
|
usb_gadget_unregister_driver (ð_driver);
|
|
}
|
|
module_exit (cleanup);
|
|
|