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u-boot/drivers/usb/gadget/ether.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
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <console.h>
#include <asm/errno.h>
#include <linux/netdevice.h>
#include <linux/usb/ch9.h>
#include <linux/usb/cdc.h>
#include <linux/usb/gadget.h>
#include <net.h>
#include <usb.h>
#include <malloc.h>
#include <memalign.h>
#include <linux/ctype.h>
#include "gadget_chips.h"
#include "rndis.h"
#define USB_NET_NAME "usb_ether"
#define atomic_read
extern struct platform_data brd;
unsigned packet_received, packet_sent;
/*
* 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 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 */
#ifndef CONFIG_USB_ETH_RNDIS
#define rndis_uninit(x) do {} while (0)
#define rndis_deregister(c) do {} while (0)
#define rndis_exit() do {} while (0)
#endif
/* CDC and RNDIS 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)
/*-------------------------------------------------------------------------*/
struct eth_dev {
struct usb_gadget *gadget;
struct usb_request *req; /* for control responses */
struct usb_request *stat_req; /* for cdc & rndis 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;
struct net_device_stats stats;
unsigned int tx_qlen;
unsigned zlp:1;
unsigned cdc:1;
unsigned rndis:1;
unsigned suspended:1;
unsigned network_started:1;
u16 cdc_filter;
unsigned long todo;
int mtu;
#define WORK_RX_MEMORY 0
int rndis_config;
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.
*/
/*-------------------------------------------------------------------------*/
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(CONFIG_USB_ETH_SUBSET)
return 1; /* only cdc possible */
#elif !defined(CONFIG_USB_ETH_CDC)
return 0; /* only subset possible */
#else
return dev->cdc; /* depends on what hardware we found */
#endif
}
/* "secondary" RNDIS config may sometimes be activated */
static inline int rndis_active(struct eth_dev *dev)
{
#ifdef CONFIG_USB_ETH_RNDIS
return dev->rndis;
#else
return 0;
#endif
}
#define subset_active(dev) (!is_cdc(dev) && !rndis_active(dev))
#define cdc_active(dev) (is_cdc(dev) && !rndis_active(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
#ifdef CONFIG_USB_ETH_QMULT
#define qmult CONFIG_USB_ETH_QMULT
#else
#define qmult 5
#endif
/* 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
/*-------------------------------------------------------------------------*/
/*
* 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 /* Compaq Computer Corp. */
#define SIMPLE_PRODUCT_NUM 0x505a /* Linux-USB "CDC Subset" Device */
/*
* For hardware that can talk RNDIS and either of the above protocols,
* use this ID ... the windows INF files will know it. Unless it's
* used with CDC Ethernet, Linux 2.4 hosts will need updates to choose
* the non-RNDIS configuration.
*/
#define RNDIS_VENDOR_NUM 0x0525 /* NetChip */
#define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */
/*
* 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).
*/
/*
* Emulating them in eth_bind:
* static ushort idVendor;
* static ushort idProduct;
*/
#if defined(CONFIG_USBNET_MANUFACTURER)
static char *iManufacturer = CONFIG_USBNET_MANUFACTURER;
#else
static char *iManufacturer = "U-boot";
#endif
/* These probably need to be configurable. */
static ushort bcdDevice;
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, with RNDIS as an optional second configuration.
*
* RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But
* the class descriptors match a modem (they're ignored; it's really just
* Ethernet functionality), they don't need the NOP altsetting, and the
* status transfer endpoint isn't optional.
*/
#define STRING_MANUFACTURER 1
#define STRING_PRODUCT 2
#define STRING_ETHADDR 3
#define STRING_DATA 4
#define STRING_CONTROL 5
#define STRING_RNDIS_CONTROL 6
#define STRING_CDC 7
#define STRING_SUBSET 8
#define STRING_RNDIS 9
#define STRING_SERIALNUMBER 10
/* holds our biggest descriptor (or RNDIS response) */
#define USB_BUFSIZ 256
/*
* This device advertises one configuration, eth_config, unless RNDIS
* is enabled (rndis_config) on hardware supporting at least two configs.
*
* NOTE: Controllers like superh_udc should probably be able to use
* an RNDIS-only configuration.
*
* FIXME define some higher-powered configurations to make it easier
* to recharge batteries ...
*/
#define DEV_CONFIG_VALUE 1 /* cdc or subset */
#define DEV_RNDIS_CONFIG_VALUE 2 /* rndis; optional */
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,
};
#ifdef CONFIG_USB_ETH_RNDIS
static struct usb_config_descriptor
rndis_config = {
.bLength = sizeof rndis_config,
.bDescriptorType = USB_DT_CONFIG,
/* compute wTotalLength on the fly */
.bNumInterfaces = 2,
.bConfigurationValue = DEV_RNDIS_CONFIG_VALUE,
.iConfiguration = STRING_RNDIS,
.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
.bMaxPower = 1,
};
#endif
/*
* 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.
*
* RNDIS shares a lot with CDC-Ethernet, since it's a variant of the
* CDC-ACM (modem) spec. Unfortunately MSFT's RNDIS driver is buggy; it
* may hang or oops. Since bugfixes (or accurate specs, letting Linux
* work around those bugs) are unlikely to ever come from MSFT, you may
* wish to avoid using RNDIS.
*
* 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 CONFIG_USB_ETH_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(CONFIG_USB_ETH_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 CONFIG_USB_ETH_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(CONFIG_USB_ETH_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 CONFIG_USB_ETH_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 CONFIG_USB_ETH_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,
.wMaxPacketSize = __constant_cpu_to_le16(64),
};
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,
.wMaxPacketSize = __constant_cpu_to_le16(64),
};
static const struct usb_descriptor_header *fs_eth_function[11] = {
(struct usb_descriptor_header *) &otg_descriptor,
#ifdef CONFIG_USB_ETH_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 /* CONFIG_USB_ETH_CDC */
};
static inline void fs_subset_descriptors(void)
{
#ifdef CONFIG_USB_ETH_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
}
#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
/*
* usb 2.0 devices need to expose both high speed and full speed
* descriptors, unless they only run at full speed.
*/
#if defined(CONFIG_USB_ETH_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 /* CONFIG_USB_ETH_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 CONFIG_USB_ETH_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 /* CONFIG_USB_ETH_CDC */
};
static inline void hs_subset_descriptors(void)
{
#ifdef CONFIG_USB_ETH_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
}
#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. */
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 CONFIG_USB_ETH_CDC
{ STRING_CDC, "CDC Ethernet", },
{ STRING_CONTROL, "CDC Communications Control", },
#endif
#ifdef CONFIG_USB_ETH_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,
};
/*============================================================================*/
DEFINE_CACHE_ALIGN_BUFFER(u8, control_req, USB_BUFSIZ);
#if defined(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
DEFINE_CACHE_ALIGN_BUFFER(u8, status_req, STATUS_BYTECOUNT);
#endif
/*============================================================================*/
/*
* 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;
#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 = &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 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(CONFIG_USB_ETH_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("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("enable %s --> %d\n",
dev->in_ep->name, result);
goto done;
}
result = usb_ep_enable(dev->out_ep, dev->out);
if (result != 0) {
debug("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) && dev->status_ep)
(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 if (!cdc_active(dev)) {
/*
* activate non-CDC configs right away
* this isn't strictly according to the RNDIS spec
*/
eth_start(dev, GFP_ATOMIC);
}
/* caller is responsible for cleanup on error */
return result;
}
static void eth_reset_config(struct eth_dev *dev)
{
if (dev->config == 0)
return;
debug("%s\n", __func__);
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);
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->out_ep, dev->rx_req);
dev->rx_req = NULL;
}
}
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
&& dev->tx_qlen != 0) {
/* tx fifo is full, but we can't clear it...*/
error("can't change configurations");
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,
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;
printf("%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 CONFIG_USB_ETH_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("send SPEED_CHANGE --> %d\n", value);
if (value == 0)
return;
} else if (value != -ECONNRESET) {
debug("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)
debug("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("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("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 */
status = rndis_msg_parser(dev->rndis_config, (u8 *) req->buf);
if (status < 0)
error("%s: rndis parse error %d", __func__, status);
}
#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.
*/
debug("%s\n", __func__);
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:
device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
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("HNP available\n");
else if (gadget->a_alt_hnp_support)
debug("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);
/*
* PXA25x driver use non-CDC ethernet gadget.
* But only _CDC and _RNDIS code can signalize
* that network is working. So we signalize it
* here.
*/
l_ethdev.network_started = 1;
debug("USB network up!\n");
goto done_set_intf;
}
#ifdef CONFIG_USB_ETH_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);
eth_start(dev, GFP_ATOMIC);
}
value = 0;
break;
}
#else
/*
* FIXME this is wrong, as is the assumption that
* all non-PXA hardware talks real CDC ...
*/
debug("set_interface ignored!\n");
#endif /* CONFIG_USB_ETH_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) || 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; */
/* carrier always ok ...*/
*(u8 *)req->buf = 1 ;
}
value = min(wLength, (u16) 1);
break;
#ifdef CONFIG_USB_ETH_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("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 /* CONFIG_USB_ETH_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;
u32 n;
/* return the result */
buf = rndis_get_next_response(dev->rndis_config, &n);
if (buf) {
memcpy(req->buf, buf, n);
req->complete = rndis_response_complete;
rndis_free_response(dev->rndis_config, buf);
value = n;
}
/* else stalls ... spec says to avoid that */
}
break;
#endif /* RNDIS */
default:
debug("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) {
debug("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("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).
*
* 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.
*/
debug("%s\n", __func__);
if (!req)
return -EINVAL;
size = (ETHER_HDR_SIZE + dev->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;
/*
* 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.
*/
req->buf = (u8 *)net_rx_packets[0];
req->length = size;
req->complete = rx_complete;
retval = usb_ep_queue(dev->out_ep, req, gfp_flags);
if (retval)
error("rx submit --> %d", retval);
return retval;
}
static void rx_complete(struct usb_ep *ep, struct usb_request *req)
{
struct eth_dev *dev = ep->driver_data;
debug("%s: status %d\n", __func__, req->status);
switch (req->status) {
/* normal completion */
case 0:
if (rndis_active(dev)) {
/* we know MaxPacketsPerTransfer == 1 here */
int length = rndis_rm_hdr(req->buf, req->actual);
if (length < 0)
goto length_err;
req->length -= length;
req->actual -= length;
}
if (req->actual < ETH_HLEN || ETH_FRAME_LEN < req->actual) {
length_err:
dev->stats.rx_errors++;
dev->stats.rx_length_errors++;
debug("rx length %d\n", req->length);
break;
}
dev->stats.rx_packets++;
dev->stats.rx_bytes += req->length;
break;
/* software-driven interface shutdown */
case -ECONNRESET: /* unlink */
case -ESHUTDOWN: /* disconnect etc */
/* for hardware automagic (such as pxa) */
case -ECONNABORTED: /* endpoint reset */
break;
/* data overrun */
case -EOVERFLOW:
dev->stats.rx_over_errors++;
/* FALLTHROUGH */
default:
dev->stats.rx_errors++;
break;
}
packet_received = 1;
}
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 fail1;
dev->rx_req = usb_ep_alloc_request(dev->out_ep, 0);
if (!dev->rx_req)
goto fail2;
return 0;
fail2:
usb_ep_free_request(dev->in_ep, dev->tx_req);
fail1:
error("can't alloc requests");
return -1;
}
static void tx_complete(struct usb_ep *ep, struct usb_request *req)
{
struct eth_dev *dev = ep->driver_data;
debug("%s: status %s\n", __func__, (req->status) ? "failed" : "ok");
switch (req->status) {
default:
dev->stats.tx_errors++;
debug("tx err %d\n", req->status);
/* FALLTHROUGH */
case -ECONNRESET: /* unlink */
case -ESHUTDOWN: /* disconnect etc */
break;
case 0:
dev->stats.tx_bytes += req->length;
}
dev->stats.tx_packets++;
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_ethaddr(dest)) {
u16 type;
/* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
* SET_ETHERNET_MULTICAST_FILTERS requests
*/
if (is_broadcast_ethaddr(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);
debug("%s...\n", __func__);
rndis_deregister(dev->rndis_config);
rndis_exit();
/* we've already been disconnected ... no i/o is active */
if (dev->req) {
usb_ep_free_request(gadget->ep0, dev->req);
dev->req = NULL;
}
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->out_ep, dev->rx_req);
dev->rx_req = NULL;
}
/* unregister_netdev (dev->net);*/
/* free_netdev(dev->net);*/
dev->gadget = NULL;
set_gadget_data(gadget, NULL);
}
static void eth_disconnect(struct usb_gadget *gadget)
{
eth_reset_config(get_gadget_data(gadget));
/* FIXME RNDIS should enter RNDIS_UNINITIALIZED */
}
static void eth_suspend(struct usb_gadget *gadget)
{
/* Not used */
}
static void eth_resume(struct usb_gadget *gadget)
{
/* Not used */
}
/*-------------------------------------------------------------------------*/
#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 void rndis_control_ack_complete(struct usb_ep *ep,
struct usb_request *req)
{
struct eth_dev *dev = ep->driver_data;
debug("%s...\n", __func__);
if (req->status || req->actual != req->length)
debug("rndis control ack complete --> %d, %d/%d\n",
req->status, req->actual, req->length);
if (!l_ethdev.network_started) {
if (rndis_get_state(dev->rndis_config)
== RNDIS_DATA_INITIALIZED) {
l_ethdev.network_started = 1;
printf("USB RNDIS network up!\n");
}
}
req->context = NULL;
if (req != dev->stat_req)
usb_ep_free_request(ep, req);
}
static char rndis_resp_buf[8] __attribute__((aligned(sizeof(__le32))));
static int rndis_control_ack(struct eth_device *net)
{
struct eth_dev *dev = &l_ethdev;
int length;
struct usb_request *resp = dev->stat_req;
/* in case RNDIS calls this after disconnect */
if (!dev->status) {
debug("status ENODEV\n");
return -ENODEV;
}
/* in case queue length > 1 */
if (resp->context) {
resp = usb_ep_alloc_request(dev->status_ep, GFP_ATOMIC);
if (!resp)
return -ENOMEM;
resp->buf = rndis_resp_buf;
}
/*
* 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 + 4)) = __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)
{
if (rndis_active(dev)) {
rndis_set_param_medium(dev->rndis_config,
NDIS_MEDIUM_802_3,
BITRATE(dev->gadget)/100);
rndis_signal_connect(dev->rndis_config);
}
}
static int eth_stop(struct eth_dev *dev)
{
#ifdef RNDIS_COMPLETE_SIGNAL_DISCONNECT
unsigned long ts;
unsigned long timeout = CONFIG_SYS_HZ; /* 1 sec to stop RNDIS */
#endif
if (rndis_active(dev)) {
rndis_set_param_medium(dev->rndis_config, NDIS_MEDIUM_802_3, 0);
rndis_signal_disconnect(dev->rndis_config);
#ifdef RNDIS_COMPLETE_SIGNAL_DISCONNECT
/* Wait until host receives OID_GEN_MEDIA_CONNECT_STATUS */
ts = get_timer(0);
while (get_timer(ts) < timeout)
usb_gadget_handle_interrupts(0);
#endif
rndis_uninit(dev->rndis_config);
dev->rndis = 0;
}
return 0;
}
/*-------------------------------------------------------------------------*/
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;
}
/* Now check the contents. */
return is_valid_ethaddr(ea);
}
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_ethaddr(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, rndis = 1;
struct usb_ep *in_ep, *out_ep, *status_ep = NULL;
int status = -ENOMEM;
int gcnum;
u8 tmp[7];
/* these flags are only ever cleared; compiler take note */
#ifndef CONFIG_USB_ETH_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(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.
*/
error("controller '%s' not recognized",
gadget->name);
return -ENODEV;
}
/*
* 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) {
#if defined(CONFIG_USB_RNDIS_VENDOR_ID) && defined(CONFIG_USB_RNDIS_PRODUCT_ID)
device_desc.idVendor =
__constant_cpu_to_le16(CONFIG_USB_RNDIS_VENDOR_ID);
device_desc.idProduct =
__constant_cpu_to_le16(CONFIG_USB_RNDIS_PRODUCT_ID);
#else
device_desc.idVendor =
__constant_cpu_to_le16(RNDIS_VENDOR_NUM);
device_desc.idProduct =
__constant_cpu_to_le16(RNDIS_PRODUCT_NUM);
#endif
sprintf(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 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);
#else
if (!cdc) {
device_desc.idVendor =
__constant_cpu_to_le16(SIMPLE_VENDOR_NUM);
device_desc.idProduct =
__constant_cpu_to_le16(SIMPLE_PRODUCT_NUM);
}
#endif
}
/* support optional vendor/distro customization */
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:
error("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(CONFIG_USB_ETH_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) {
error("can't run RNDIS on %s", gadget->name);
return -ENODEV;
#ifdef CONFIG_USB_ETH_CDC
} 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();
}
usb_gadget_set_selfpowered(gadget);
/* For now RNDIS is always a second config */
if (rndis)
device_desc.bNumConfigurations = 2;
if (gadget_is_dualspeed(gadget)) {
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(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
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;
#ifdef CONFIG_USB_ETH_RNDIS
rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
rndis_config.bMaxPower = 4;
#endif
}
/* network device setup */
dev->net = &l_netdev;
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.
*/
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]);
if (rndis) {
status = rndis_init();
if (status < 0) {
error("can't init RNDIS, %d", status);
goto fail;
}
}
/*
* 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(CONFIG_USB_ETH_CDC) || defined(CONFIG_USB_ETH_RNDIS)
if (dev->status_ep) {
dev->stat_req = usb_ep_alloc_request(dev->status_ep,
GFP_KERNEL);
if (!dev->stat_req) {
usb_ep_free_request(dev->status_ep, dev->req);
goto fail;
}
dev->stat_req->buf = status_req;
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"
*/
printf("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 : ""
);
printf("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 || rndis)
printf("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:
eth_unbind(gadget);
debug("RNDIS setup failed\n");
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->mtu,
&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;
printf("RNDIS ready\n");
}
return 0;
fail:
error("%s failed, status = %d", __func__, status);
eth_unbind(gadget);
return status;
}
/*-------------------------------------------------------------------------*/
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) {
error("received NULL ptr");
goto fail;
}
board_usb_init(0, USB_INIT_DEVICE);
/* Configure default mac-addresses for the USB ethernet device */
#ifdef CONFIG_USBNET_DEV_ADDR
strlcpy(dev_addr, CONFIG_USBNET_DEV_ADDR, sizeof(dev_addr));
#endif
#ifdef CONFIG_USBNET_HOST_ADDR
strlcpy(host_addr, CONFIG_USBNET_HOST_ADDR, sizeof(host_addr));
#endif
/* Check if the user overruled the MAC addresses */
if (getenv("usbnet_devaddr"))
strlcpy(dev_addr, getenv("usbnet_devaddr"),
sizeof(dev_addr));
if (getenv("usbnet_hostaddr"))
strlcpy(host_addr, getenv("usbnet_hostaddr"),
sizeof(host_addr));
if (!is_eth_addr_valid(dev_addr)) {
error("Need valid 'usbnet_devaddr' to be set");
goto fail;
}
if (!is_eth_addr_valid(host_addr)) {
error("Need valid 'usbnet_hostaddr' to be set");
goto fail;
}
if (usb_gadget_register_driver(&eth_driver) < 0)
goto fail;
dev->network_started = 0;
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)) {
error("The remote end did not respond in time.");
goto fail;
}
usb_gadget_handle_interrupts(0);
}
packet_received = 0;
rx_submit(dev, dev->rx_req, 0);
return 0;
fail:
return -1;
}
static int usb_eth_send(struct eth_device *netdev, void *packet, int length)
{
int retval;
void *rndis_pkt = NULL;
struct eth_dev *dev = &l_ethdev;
struct usb_request *req = dev->tx_req;
unsigned long ts;
unsigned long timeout = USB_CONNECT_TIMEOUT;
debug("%s:...\n", __func__);
/* new buffer is needed to include RNDIS header */
if (rndis_active(dev)) {
rndis_pkt = malloc(length +
sizeof(struct rndis_packet_msg_type));
if (!rndis_pkt) {
error("No memory to alloc RNDIS packet");
goto drop;
}
rndis_add_hdr(rndis_pkt, length);
memcpy(rndis_pkt + sizeof(struct rndis_packet_msg_type),
packet, length);
packet = rndis_pkt;
length += sizeof(struct rndis_packet_msg_type);
}
req->buf = 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;
ts = get_timer(0);
packet_sent = 0;
retval = usb_ep_queue(dev->in_ep, req, GFP_ATOMIC);
if (!retval)
debug("%s: packet queued\n", __func__);
while (!packet_sent) {
if (get_timer(ts) > timeout) {
printf("timeout sending packets to usb ethernet\n");
return -1;
}
usb_gadget_handle_interrupts(0);
}
if (rndis_pkt)
free(rndis_pkt);
return 0;
drop:
dev->stats.tx_dropped++;
return -ENOMEM;
}
static int usb_eth_recv(struct eth_device *netdev)
{
struct eth_dev *dev = &l_ethdev;
usb_gadget_handle_interrupts(0);
if (packet_received) {
debug("%s: packet received\n", __func__);
if (dev->rx_req) {
net_process_received_packet(net_rx_packets[0],
dev->rx_req->length);
packet_received = 0;
rx_submit(dev, dev->rx_req, 0);
} else
error("dev->rx_req invalid");
}
return 0;
}
void usb_eth_halt(struct eth_device *netdev)
{
struct eth_dev *dev = &l_ethdev;
if (!netdev) {
error("received NULL ptr");
return;
}
/* If the gadget not registered, simple return */
if (!dev->gadget)
return;
/*
* Some USB controllers may need additional deinitialization here
* before dropping pull-up (also due to hardware issues).
* For example: unhandled interrupt with status stage started may
* bring the controller to fully broken state (until board reset).
* There are some variants to debug and fix such cases:
* 1) In the case of RNDIS connection eth_stop can perform additional
* interrupt handling. See RNDIS_COMPLETE_SIGNAL_DISCONNECT definition.
* 2) 'pullup' callback in your UDC driver can be improved to perform
* this deinitialization.
*/
eth_stop(dev);
usb_gadget_disconnect(dev->gadget);
/* Clear pending interrupt */
if (dev->network_started) {
usb_gadget_handle_interrupts(0);
dev->network_started = 0;
}
usb_gadget_unregister_driver(&eth_driver);
board_usb_cleanup(0, USB_INIT_DEVICE);
}
static struct usb_gadget_driver eth_driver = {
.speed = DEVSPEED,
.bind = eth_bind,
.unbind = eth_unbind,
.setup = eth_setup,
.reset = eth_disconnect,
.disconnect = eth_disconnect,
.suspend = eth_suspend,
.resume = eth_resume,
};
int usb_eth_initialize(bd_t *bi)
{
struct eth_device *netdev = &l_netdev;
strlcpy(netdev->name, USB_NET_NAME, sizeof(netdev->name));
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
eth_register(netdev);
return 0;
}
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