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u-boot/drivers/usb/gadget/ether.c
Remy Bohmer 23cd138503 Integrate USB gadget layer and USB CDC driver layer 
Derived from Linux kernel 2.6.27

Signed-off-by: Thomas Smits <ts.smits@gmail.com>
Signed-off-by: Remy Bohmer <linux@bohmer.net>
2010-09-20 21:57:16 +02:00

1947 lines
52 KiB
C
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/*
* ether.c -- Ethernet gadget driver, with CDC and non-CDC options
*
* Copyright (C) 2003-2005,2008 David Brownell
* Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
* Copyright (C) 2008 Nokia Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <common.h>
#include <asm/errno.h>
#include <linux/usb/ch9.h>
#include <linux/usb/cdc.h>
#include <linux/usb/gadget.h>
#include <net.h>
#include <linux/ctype.h>
#include "gadget_chips.h"
#define USB_NET_NAME "usb0"
#define dprintf(x, ...)
#undef INFO
#define INFO(x, s...) printf(s)
#define dev_err(x, stuff...) printf(stuff)
#define dev_dbg dev_err
#define dev_warn dev_err
#define DEBUG dev_err
#define VDEBUG DEBUG
#define atomic_read
extern struct platform_data brd;
#define spin_lock(x)
#define spin_unlock(x)
unsigned packet_received, packet_sent;
#define DEV_CONFIG_CDC 1
#define GFP_ATOMIC ((gfp_t) 0)
#define GFP_KERNEL ((gfp_t) 0)
/*
* Ethernet gadget driver -- with CDC and non-CDC options
* Builds on hardware support for a full duplex link.
*
* CDC Ethernet is the standard USB solution for sending Ethernet frames
* using USB. Real hardware tends to use the same framing protocol but look
* different for control features. This driver strongly prefers to use
* this USB-IF standard as its open-systems interoperability solution;
* most host side USB stacks (except from Microsoft) support it.
*
* This is sometimes called "CDC ECM" (Ethernet Control Model) to support
* TLA-soup. "CDC ACM" (Abstract Control Model) is for modems, and a new
* "CDC EEM" (Ethernet Emulation Model) is starting to spread.
*
* There's some hardware that can't talk CDC ECM. We make that hardware
* implement a "minimalist" vendor-agnostic CDC core: same framing, but
* link-level setup only requires activating the configuration. Only the
* endpoint descriptors, and product/vendor IDs, are relevant; no control
* operations are available. Linux supports it, but other host operating
* systems may not. (This is a subset of CDC Ethernet.)
*
* It turns out that if you add a few descriptors to that "CDC Subset",
* (Windows) host side drivers from MCCI can treat it as one submode of
* a proprietary scheme called "SAFE" ... without needing to know about
* specific product/vendor IDs. So we do that, making it easier to use
* those MS-Windows drivers. Those added descriptors make it resemble a
* CDC MDLM device, but they don't change device behavior at all. (See
* MCCI Engineering report 950198 "SAFE Networking Functions".)
*
* A third option is also in use. Rather than CDC Ethernet, or something
* simpler, Microsoft pushes their own approach: RNDIS. The published
* RNDIS specs are ambiguous and appear to be incomplete, and are also
* needlessly complex. They borrow more from CDC ACM than CDC ECM.
*/
#define ETH_ALEN 6 /* Octets in one ethernet addr */
#define ETH_HLEN 14 /* Total octets in header. */
#define ETH_ZLEN 60 /* Min. octets in frame sans FCS */
#define ETH_DATA_LEN 1500 /* Max. octets in payload */
#define ETH_FRAME_LEN PKTSIZE_ALIGN /* Max. octets in frame sans FCS */
#define ETH_FCS_LEN 4 /* Octets in the FCS */
#define DRIVER_DESC "Ethernet Gadget"
/* Based on linux 2.6.27 version */
#define DRIVER_VERSION "May Day 2005"
static const char shortname [] = "ether";
static const char driver_desc [] = DRIVER_DESC;
#define RX_EXTRA 20 /* guard against rx overflows */
/* CDC support the same host-chosen outgoing packet filters. */
#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
|USB_CDC_PACKET_TYPE_ALL_MULTICAST \
|USB_CDC_PACKET_TYPE_PROMISCUOUS \
|USB_CDC_PACKET_TYPE_DIRECTED)
#define USB_CONNECT_TIMEOUT (3 * CONFIG_SYS_HZ)
/*-------------------------------------------------------------------------*/
static struct eth_dev l_ethdev;
static struct eth_device l_netdev;
static struct usb_gadget_driver eth_driver;
/*-------------------------------------------------------------------------*/
/* "main" config is either CDC, or its simple subset */
static inline int is_cdc(struct eth_dev *dev)
{
#if !defined(DEV_CONFIG_SUBSET)
return 1; /* only cdc possible */
#elif !defined (DEV_CONFIG_CDC)
return 0; /* only subset possible */
#else
return dev->cdc; /* depends on what hardware we found */
#endif
}
#define subset_active(dev) (!is_cdc(dev))
#define cdc_active(dev) ( is_cdc(dev))
#define DEFAULT_QLEN 2 /* double buffering by default */
/* peak bulk transfer bits-per-second */
#define HS_BPS (13 * 512 * 8 * 1000 * 8)
#define FS_BPS (19 * 64 * 1 * 1000 * 8)
#ifdef CONFIG_USB_GADGET_DUALSPEED
#define DEVSPEED USB_SPEED_HIGH
/* for dual-speed hardware, use deeper queues at highspeed */
#define qlen(gadget) \
(DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1))
static inline int BITRATE(struct usb_gadget *g)
{
return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS;
}
#else /* full speed (low speed doesn't do bulk) */
#define qmult 1
#define DEVSPEED USB_SPEED_FULL
#define qlen(gadget) DEFAULT_QLEN
static inline int BITRATE(struct usb_gadget *g)
{
return FS_BPS;
}
#endif
struct eth_dev {
struct usb_gadget *gadget;
struct usb_request *req; /* for control responses */
struct usb_request *stat_req; /* for cdc status */
u8 config;
struct usb_ep *in_ep, *out_ep, *status_ep;
const struct usb_endpoint_descriptor
*in, *out, *status;
struct usb_request *tx_req, *rx_req;
struct eth_device *net;
unsigned int tx_qlen;
unsigned zlp:1;
unsigned cdc:1;
unsigned suspended:1;
unsigned network_started:1;
u16 cdc_filter;
unsigned long todo;
int mtu;
#define WORK_RX_MEMORY 0
u8 host_mac [ETH_ALEN];
};
/* This version autoconfigures as much as possible at run-time.
*
* It also ASSUMES a self-powered device, without remote wakeup,
* although remote wakeup support would make sense.
*/
/*-------------------------------------------------------------------------*/
/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
* Instead: allocate your own, using normal USB-IF procedures.
*/
/* Thanks to NetChip Technologies for donating this product ID.
* It's for devices with only CDC Ethernet configurations.
*/
#define CDC_VENDOR_NUM 0x0525 /* NetChip */
#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
/* For hardware that can't talk CDC, we use the same vendor ID that
* ARM Linux has used for ethernet-over-usb, both with sa1100 and
* with pxa250. We're protocol-compatible, if the host-side drivers
* use the endpoint descriptors. bcdDevice (version) is nonzero, so
* drivers that need to hard-wire endpoint numbers have a hook.
*
* The protocol is a minimal subset of CDC Ether, which works on any bulk
* hardware that's not deeply broken ... even on hardware that can't talk
* RNDIS (like SA-1100, with no interrupt endpoint, or anything that
* doesn't handle control-OUT).
*/
#define SIMPLE_VENDOR_NUM 0x049f
#define SIMPLE_PRODUCT_NUM 0x505a
/* Some systems will want different product identifers published in the
* device descriptor, either numbers or strings or both. These string
* parameters are in UTF-8 (superset of ASCII's 7 bit characters).
*/
static ushort bcdDevice;
#if defined(CONFIG_USBNET_MANUFACTURER)
static char *iManufacturer = CONFIG_USBNET_MANUFACTURER;
#else
static char *iManufacturer = "U-boot";
#endif
static char *iProduct;
static char *iSerialNumber;
static char dev_addr[18];
static char host_addr[18];
/*-------------------------------------------------------------------------*/
/* USB DRIVER HOOKUP (to the hardware driver, below us), mostly
* ep0 implementation: descriptors, config management, setup().
* also optional class-specific notification interrupt transfer.
*/
/*
* DESCRIPTORS ... most are static, but strings and (full) configuration
* descriptors are built on demand. For now we do either full CDC, or
* our simple subset.
*/
#define STRING_MANUFACTURER 1
#define STRING_PRODUCT 2
#define STRING_ETHADDR 3
#define STRING_DATA 4
#define STRING_CONTROL 5
#define STRING_CDC 7
#define STRING_SUBSET 8
#define STRING_SERIALNUMBER 10
/* holds our biggest descriptor */
#define USB_BUFSIZ 256
/*
* This device advertises one configuration, eth_config,
* on hardware supporting at least two configs.
*
* FIXME define some higher-powered configurations to make it easier
* to recharge batteries ...
*/
#define DEV_CONFIG_VALUE 1 /* cdc or subset */
static struct usb_device_descriptor
device_desc = {
.bLength = sizeof device_desc,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = __constant_cpu_to_le16 (0x0200),
.bDeviceClass = USB_CLASS_COMM,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.idVendor = __constant_cpu_to_le16 (CDC_VENDOR_NUM),
.idProduct = __constant_cpu_to_le16 (CDC_PRODUCT_NUM),
.iManufacturer = STRING_MANUFACTURER,
.iProduct = STRING_PRODUCT,
.bNumConfigurations = 1,
};
static struct usb_otg_descriptor
otg_descriptor = {
.bLength = sizeof otg_descriptor,
.bDescriptorType = USB_DT_OTG,
.bmAttributes = USB_OTG_SRP,
};
static struct usb_config_descriptor
eth_config = {
.bLength = sizeof eth_config,
.bDescriptorType = USB_DT_CONFIG,
/* compute wTotalLength on the fly */
.bNumInterfaces = 2,
.bConfigurationValue = DEV_CONFIG_VALUE,
.iConfiguration = STRING_CDC,
.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1,
};
/*
* Compared to the simple CDC subset, the full CDC Ethernet model adds
* three class descriptors, two interface descriptors, optional status
* endpoint. Both have a "data" interface and two bulk endpoints.
* There are also differences in how control requests are handled.
*/
#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
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)
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 */
#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)
/* 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).
*/
#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 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 *) &ether_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 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 *) &ether_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
}
/*
* 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)
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 *) &ether_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 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 *) &ether_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
}
/* maxpacket and other transfer characteristics vary by speed. */
static inline struct usb_endpoint_descriptor *
ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
struct usb_endpoint_descriptor *fs)
{
if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
return hs;
return fs;
}
/*-------------------------------------------------------------------------*/
/* 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
{ } /* end of list */
};
static struct usb_gadget_strings stringtab = {
.language = 0x0409, /* en-us */
.strings = strings,
};
/*============================================================================*/
static u8 control_req[USB_BUFSIZ];
static u8 status_req[STATUS_BYTECOUNT];
/**
* strlcpy - Copy a %NUL terminated string into a sized buffer
* @dest: Where to copy the string to
* @src: Where to copy the string from
* @size: size of destination buffer
*
* Compatible with *BSD: the result is always a valid
* NUL-terminated string that fits in the buffer (unless,
* of course, the buffer size is zero). It does not pad
* out the result like strncpy() does.
*/
size_t strlcpy(char *dest, const char *src, size_t size)
{
size_t ret = strlen(src);
if (size) {
size_t len = (ret >= size) ? size - 1 : ret;
memcpy(dest, src, len);
dest[len] = '\0';
}
return ret;
}
/*============================================================================*/
/*
* one config, two interfaces: control, data.
* complications: class descriptors, and an altsetting.
*/
static int
config_buf(struct usb_gadget *g, u8 *buf, u8 type, unsigned index, int is_otg)
{
int len;
const struct usb_config_descriptor *config;
const struct usb_descriptor_header **function;
int hs = 0;
if (gadget_is_dualspeed(g)) {
hs = (g->speed == USB_SPEED_HIGH);
if (type == USB_DT_OTHER_SPEED_CONFIG)
hs = !hs;
}
#define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function)
if (index >= device_desc.bNumConfigurations)
return -EINVAL;
config = &eth_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 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)
/* status endpoint used for (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) {
printf ("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.
*/
if (!cdc_active(dev)) {
result = usb_ep_enable (dev->in_ep, dev->in);
if (result != 0) {
printf ("enable %s --> %d\n",
dev->in_ep->name, result);
goto done;
}
result = usb_ep_enable (dev->out_ep, dev->out);
if (result != 0) {
printf ("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;
}
/* caller is responsible for cleanup on error */
return result;
}
static void eth_reset_config (struct eth_dev *dev)
{
if (dev->config == 0)
return;
/* disable endpoints, forcing (synchronous) completion of
* pending i/o. then free the requests.
*/
if (dev->in) {
usb_ep_disable (dev->in_ep);
if (dev->tx_req) {
usb_ep_free_request (dev->in_ep, dev->tx_req);
dev->tx_req=NULL;
}
}
if (dev->out) {
usb_ep_disable (dev->out_ep);
if (dev->rx_req) {
usb_ep_free_request (dev->in_ep, dev->rx_req);
dev->rx_req=NULL;
}
}
if (dev->status) {
usb_ep_disable (dev->status_ep);
}
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
&& 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;
default:
result = -EINVAL;
/* FALL THROUGH */
case 0:
break;
}
if (result) {
if (number)
eth_reset_config (dev);
usb_gadget_vbus_draw(dev->gadget,
gadget_is_otg(dev->gadget) ? 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,
(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. 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);
dprintf ("send SPEED_CHANGE --> %d\n", value);
if (value == 0)
return;
} else if (value != -ECONNRESET) {
dprintf("event %02x --> %d\n",
event->bNotificationType, value);
if (event->bNotificationType==
USB_CDC_NOTIFY_SPEED_CHANGE)
{
l_ethdev.network_started=1;
printf("USB network up!\n");
}
}
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;
/* 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)
printf ("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)
dprintf (/*(struct eth_dev *) ep->driver_data*/
"setup complete --> %d, %d/%d\n",
req->status, req->actual, req->length);
}
/*
* 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.
*/
dprintf("eth_setup:...\n");
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;
case USB_DT_DEVICE_QUALIFIER:
if (!gadget_is_dualspeed(gadget))
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(gadget))
break;
/* FALLTHROUGH */
case USB_DT_CONFIG:
value = config_buf(gadget, req->buf,
wValue >> 8,
wValue & 0xff,
gadget_is_otg(gadget));
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");
value = eth_set_config (dev, wValue, GFP_ATOMIC);
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;
/* 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;
if (dev->status)
issue_start_status (dev);
}
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:
break;
case USB_REQ_GET_INTERFACE:
if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)
|| !dev->config
|| wIndex > 1)
break;
if (!(cdc_active(dev)) && wIndex != 0)
break;
/* for CDC, iff carrier is on, data interface is active. */
if (wIndex != 1)
*(u8 *)req->buf = 0;
else {
/* *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0; */
/* carrier always ok ...*/
*(u8 *)req->buf = 1 ;
}
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;
printf ("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 */
default:
printf (
"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) {
dprintf("respond with data transfer before status phase\n");
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 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)
{
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).
*/
dprintf("%s\n", __func__);
size = (ETHER_HDR_SIZE + dev->mtu + RX_EXTRA);
size += dev->out_ep->maxpacket - 1;
size -= size % dev->out_ep->maxpacket;
/* Some platforms perform better when IP packets are aligned,
* but on at least one, checksumming fails otherwise.
*/
req->buf = (u8 *) NetRxPackets[0];
req->length = size;
req->complete = rx_complete;
retval = usb_ep_queue (dev->out_ep, req, gfp_flags);
if (retval) {
dprintf ("rx submit --> %d\n", retval);
}
return retval;
}
static void rx_complete (struct usb_ep *ep, struct usb_request *req)
{
struct eth_dev *dev = ep->driver_data;
dprintf("%s\n", __func__);
dprintf("rx status %d\n", req->status);
packet_received=1;
if (req)
dev->rx_req=req;
}
static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags)
{
dev->tx_req = usb_ep_alloc_request (dev->in_ep, 0);
if (!dev->tx_req)
goto fail;
dev->rx_req = usb_ep_alloc_request (dev->out_ep, 0);
if (!dev->rx_req)
goto fail;
return 0;
fail:
DEBUG (dev, "can't alloc requests\n");
return -1;
}
static void tx_complete (struct usb_ep *ep, struct usb_request *req)
{
dprintf("%s, status: %s\n", __func__,(req->status) ? "failed":"ok");
packet_sent=1;
}
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;
}
#if 0
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);
/*
* this freelist can be empty if an interrupt triggered disconnect()
* and reconfigured the gadget (shutting down this queue) after the
* network stack decided to xmit but before we got the spinlock.
*/
if (list_empty(&dev->tx_reqs)) {
spin_unlock_irqrestore(&dev->req_lock, flags);
return 1;
}
req = container_of (dev->tx_reqs.next, struct usb_request, list);
list_del (&req->list);
/* temporarily stop TX queue when the freelist empties */
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;
/* throttle highspeed IRQ rate back slightly */
if (gadget_is_dualspeed(dev->gadget))
req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
? ((atomic_read(&dev->tx_qlen) % qmult) != 0)
: 0;
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;
}
/*-------------------------------------------------------------------------*/
#endif
static void eth_unbind (struct usb_gadget *gadget)
{
struct eth_dev *dev = get_gadget_data (gadget);
printf("eth_unbind:...\n");
if (dev->stat_req) {
usb_ep_free_request (dev->status_ep, dev->stat_req);
dev->stat_req = NULL;
}
if (dev->tx_req) {
usb_ep_free_request (dev->in_ep, dev->tx_req);
dev->tx_req=NULL;
}
if (dev->rx_req) {
usb_ep_free_request (dev->in_ep, dev->rx_req);
dev->rx_req=NULL;
}
/* unregister_netdev (dev->net);*/
/* free_netdev(dev->net);*/
set_gadget_data (gadget, NULL);
}
static void eth_disconnect (struct usb_gadget *gadget)
{
eth_reset_config (get_gadget_data (gadget));
}
static void eth_suspend (struct usb_gadget *gadget)
{
/* Not used */
}
static void eth_resume (struct usb_gadget *gadget)
{
/* Not used */
}
/*-------------------------------------------------------------------------*/
static int is_eth_addr_valid(char *str)
{
if (strlen(str) == 17) {
int i;
char *p, *q;
uchar ea[6];
/* see if it looks like an ethernet address */
p = str;
for (i = 0; i < 6; i++) {
char term = (i == 5 ? '\0' : ':');
ea[i] = simple_strtol(p, &q, 16);
if ((q - p) != 2 || *q++ != term)
break;
p = q;
}
if (i == 6) /* it looks ok */
return 1;
}
return 0;
}
static u8 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 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;
}
return 1;
}
static int eth_bind(struct usb_gadget *gadget)
{
struct eth_dev *dev = &l_ethdev;
u8 cdc = 1, zlp = 1;
struct usb_ep *in_ep, *out_ep, *status_ep = NULL;
int gcnum;
u8 tmp[7];
/* these flags are only ever cleared; compiler take note */
#ifndef DEV_CONFIG_CDC
cdc = 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;
} 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 (0x0300 + 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;
}
/* 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.)
*/
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 defined(CONFIG_USB_CDC_VENDOR_ID) && defined(CONFIG_USB_CDC_PRODUCT_ID)
device_desc.idVendor = cpu_to_le16(CONFIG_USB_CDC_VENDOR_ID);
device_desc.idProduct = cpu_to_le16(CONFIG_USB_CDC_PRODUCT_ID);
#endif
if (bcdDevice)
device_desc.bcdDevice = cpu_to_le16(bcdDevice);
if (iManufacturer)
strcpy (manufacturer, iManufacturer);
if (iProduct)
strcpy (product_desc, iProduct);
if (iSerialNumber) {
device_desc.iSerialNumber = STRING_SERIALNUMBER,
strcpy(serial_number, iSerialNumber);
}
/* 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)
/* CDC Ethernet control interface doesn't require a status endpoint.
* Since some hosts expect one, try to allocate one anyway.
*/
if (cdc) {
status_ep = usb_ep_autoconfig (gadget, &fs_status_desc);
if (status_ep) {
status_ep->driver_data = status_ep; /* claim */
} else if (cdc) {
control_intf.bNumEndpoints = 0;
/* FIXME remove endpoint from descriptor list */
}
}
#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);
if (gadget_is_dualspeed(gadget)) {
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)
if (status_ep)
hs_status_desc.bEndpointAddress =
fs_status_desc.bEndpointAddress;
#endif
}
if (gadget_is_otg(gadget)) {
otg_descriptor.bmAttributes |= USB_OTG_HNP,
eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
eth_config.bMaxPower = 4;
}
dev->net = &l_netdev;
strcpy (dev->net->name, USB_NET_NAME);
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 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.
*/
get_ether_addr(dev_addr, dev->net->enetaddr);
memset(tmp, 0, sizeof(tmp));
memcpy(tmp, dev->net->enetaddr, sizeof(dev->net->enetaddr));
get_ether_addr(host_addr, dev->host_mac);
sprintf (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]);
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",
dev->net->enetaddr [0], dev->net->enetaddr [1],
dev->net->enetaddr [2], dev->net->enetaddr [3],
dev->net->enetaddr [4], dev->net->enetaddr [5]);
if (cdc) {
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]);
}
/* use PKTSIZE (or aligned... from u-boot) and set
* wMaxSegmentSize accordingly*/
dev->mtu = PKTSIZE_ALIGN; /* RNDIS does not like this, only 1514, TODO*/
/* preallocate control message data and buffer */
dev->req = usb_ep_alloc_request (gadget->ep0, GFP_KERNEL);
if (!dev->req)
goto fail;
dev->req->buf = control_req;
dev->req->complete = eth_setup_complete;
/* ... and maybe likewise for status transfer */
#if defined(DEV_CONFIG_CDC)
if (dev->status_ep) {
dev->stat_req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL);
dev->stat_req->buf = status_req;
if (!dev->stat_req) {
dev->stat_req->buf=NULL;
usb_ep_free_request (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"
*/
return 0;
fail:
dev_dbg(&gadget->dev, "register_netdev failed\n");
eth_unbind (gadget);
return -ENOMEM;
}
static int usb_eth_init(struct eth_device* netdev, bd_t* bd)
{
struct eth_dev *dev=&l_ethdev;
struct usb_gadget *gadget;
unsigned long ts;
unsigned long timeout = USB_CONNECT_TIMEOUT;
if (!netdev) {
printf("ERROR: received NULL ptr\n");
goto fail;
}
dev->network_started = 0;
dev->tx_req = NULL;
dev->rx_req = NULL;
packet_received = 0;
packet_sent = 0;
gadget = dev->gadget;
usb_gadget_connect(gadget);
if (getenv("cdc_connect_timeout"))
timeout = simple_strtoul(getenv("cdc_connect_timeout"),
NULL, 10) * CONFIG_SYS_HZ;
ts = get_timer(0);
while (!l_ethdev.network_started)
{
/* Handle control-c and timeouts */
if (ctrlc() || (get_timer(ts) > timeout)) {
printf("The remote end did not respond in time.\n");
goto fail;
}
usb_gadget_handle_interrupts();
}
rx_submit (dev, dev->rx_req, 0);
return 0;
fail:
return -1;
}
static int usb_eth_send(struct eth_device* netdev, volatile void* packet, int length)
{
int retval;
struct usb_request *req = NULL;
struct eth_dev *dev = &l_ethdev;
dprintf("%s:...\n",__func__);
req = dev->tx_req;
req->buf = (void *)packet;
req->context = NULL;
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;
#if 0
/* throttle highspeed IRQ rate back slightly */
if (gadget_is_dualspeed(dev->gadget))
req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
? ((dev->tx_qlen % qmult) != 0) : 0;
#endif
dev->tx_qlen=1;
retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
if (!retval)
dprintf("%s: packet queued\n",__func__);
while(!packet_sent)
{
packet_sent=0;
}
return 0;
}
static int usb_eth_recv(struct eth_device* netdev)
{
struct eth_dev *dev = &l_ethdev;
usb_gadget_handle_interrupts();
if (packet_received)
{
dprintf("%s: packet received \n",__func__);
if (dev->rx_req)
{
NetReceive(NetRxPackets[0],dev->rx_req->length);
packet_received=0;
if (dev->rx_req)
rx_submit (dev, dev->rx_req, 0);
}
else printf("dev->rx_req invalid\n");
}
return 0;
}
void usb_eth_halt(struct eth_device* netdev)
{
struct eth_dev *dev =&l_ethdev;
if (!netdev)
{
printf("ERROR: received NULL ptr\n");
return;
}
usb_gadget_disconnect(dev->gadget);
}
static struct usb_gadget_driver eth_driver = {
.speed = DEVSPEED,
.bind = eth_bind,
.unbind = eth_unbind,
.setup = eth_setup,
.disconnect = eth_disconnect,
.suspend = eth_suspend,
.resume = eth_resume,
};
int usb_eth_initialize(bd_t *bi)
{
int status = 0;
struct eth_device *netdev=&l_netdev;
sprintf(netdev->name,"usb_ether");
netdev->init = usb_eth_init;
netdev->send = usb_eth_send;
netdev->recv = usb_eth_recv;
netdev->halt = usb_eth_halt;
#ifdef CONFIG_MCAST_TFTP
#error not supported
#endif
/* Configure default mac-addresses for the USB ethernet device */
#ifdef CONFIG_USBNET_DEV_ADDR
strncpy(dev_addr, CONFIG_USBNET_DEV_ADDR, sizeof(dev_addr));
#endif
#ifdef CONFIG_USBNET_HOST_ADDR
strncpy(host_addr, CONFIG_USBNET_HOST_ADDR, sizeof(host_addr));
#endif
/* Check if the user overruled the MAC addresses */
if (getenv("usbnet_devaddr"))
strncpy(dev_addr, getenv("usbnet_devaddr"),
sizeof(dev_addr));
if (getenv("usbnet_hostaddr"))
strncpy(host_addr, getenv("usbnet_hostaddr"),
sizeof(host_addr));
/* Make sure both strings are terminated */
dev_addr[sizeof(dev_addr)-1] = '\0';
host_addr[sizeof(host_addr)-1] = '\0';
if (!is_eth_addr_valid(dev_addr)) {
printf("ERROR: Need valid 'usbnet_devaddr' to be set\n");
status = -1;
}
if (!is_eth_addr_valid(host_addr)) {
printf("ERROR: Need valid 'usbnet_hostaddr' to be set\n");
status = -1;
}
if (status)
goto fail;
status = usb_gadget_register_driver(&eth_driver);
if (status < 0)
goto fail;
eth_register(netdev);
return 0;
fail:
printf("%s failed\n", __func__ );
return status;
}
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