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@@ -0,0 +1,1001 @@
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+/*
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+ * USB-to-WWAN Driver for Sierra Wireless modems
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+ *
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+ * Copyright (C) 2008, 2009, 2010 Paxton Smith, Matthew Safar, Rory Filer
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+ * <linux@sierrawireless.com>
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+ *
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+ * Portions of this based on the cdc_ether driver by David Brownell (2003-2005)
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+ * and Ole Andre Vadla Ravnas (ActiveSync) (2006).
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+ *
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+ * IMPORTANT DISCLAIMER: This driver is not commercially supported by
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+ * Sierra Wireless. Use at your own risk.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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+ */
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+
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+#define DRIVER_VERSION "v.2.0"
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+#define DRIVER_AUTHOR "Paxton Smith, Matthew Safar, Rory Filer"
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+#define DRIVER_DESC "USB-to-WWAN Driver for Sierra Wireless modems"
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+static const char driver_name[] = "sierra_net";
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+
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+/* if defined debug messages enabled */
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+/*#define DEBUG*/
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+
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+#include <linux/module.h>
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+#include <linux/etherdevice.h>
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+#include <linux/ethtool.h>
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+#include <linux/mii.h>
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+#include <linux/sched.h>
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+#include <linux/timer.h>
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+#include <linux/usb.h>
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+#include <linux/usb/cdc.h>
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+#include <net/ip.h>
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+#include <net/udp.h>
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+#include <asm/unaligned.h>
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+#include <linux/usb/usbnet.h>
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+
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+#define SWI_USB_REQUEST_GET_FW_ATTR 0x06
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+#define SWI_GET_FW_ATTR_MASK 0x08
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+
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+/* atomic counter partially included in MAC address to make sure 2 devices
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+ * do not end up with the same MAC - concept breaks in case of > 255 ifaces
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+ */
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+static atomic_t iface_counter = ATOMIC_INIT(0);
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+
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+/*
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+ * SYNC Timer Delay definition used to set the expiry time
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+ */
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+#define SIERRA_NET_SYNCDELAY (2*HZ)
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+
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+/* Max. MTU supported. The modem buffers are limited to 1500 */
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+#define SIERRA_NET_MAX_SUPPORTED_MTU 1500
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+
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+/* The SIERRA_NET_USBCTL_BUF_LEN defines a buffer size allocated for control
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+ * message reception ... and thus the max. received packet.
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+ * (May be the cause for parse_hip returning -EINVAL)
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+ */
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+#define SIERRA_NET_USBCTL_BUF_LEN 1024
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+
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+/* list of interface numbers - used for constructing interface lists */
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+struct sierra_net_iface_info {
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+ const u32 infolen; /* number of interface numbers on list */
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+ const u8 *ifaceinfo; /* pointer to the array holding the numbers */
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+};
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+
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+struct sierra_net_info_data {
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+ u16 rx_urb_size;
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+ struct sierra_net_iface_info whitelist;
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+};
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+
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+/* Private data structure */
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+struct sierra_net_data {
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+
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+ u8 ethr_hdr_tmpl[ETH_HLEN]; /* ethernet header template for rx'd pkts */
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+
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+ u16 link_up; /* air link up or down */
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+ u8 tx_hdr_template[4]; /* part of HIP hdr for tx'd packets */
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+
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+ u8 sync_msg[4]; /* SYNC message */
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+ u8 shdwn_msg[4]; /* Shutdown message */
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+
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+ /* Backpointer to the container */
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+ struct usbnet *usbnet;
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+
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+ u8 ifnum; /* interface number */
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+
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+/* Bit masks, must be a power of 2 */
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+#define SIERRA_NET_EVENT_RESP_AVAIL 0x01
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+#define SIERRA_NET_TIMER_EXPIRY 0x02
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+ unsigned long kevent_flags;
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+ struct work_struct sierra_net_kevent;
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+ struct timer_list sync_timer; /* For retrying SYNC sequence */
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+};
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+
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+struct param {
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+ int is_present;
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+ union {
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+ void *ptr;
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+ u32 dword;
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+ u16 word;
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+ u8 byte;
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+ };
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+};
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+
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+/* HIP message type */
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+#define SIERRA_NET_HIP_EXTENDEDID 0x7F
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+#define SIERRA_NET_HIP_HSYNC_ID 0x60 /* Modem -> host */
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+#define SIERRA_NET_HIP_RESTART_ID 0x62 /* Modem -> host */
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+#define SIERRA_NET_HIP_MSYNC_ID 0x20 /* Host -> modem */
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+#define SIERRA_NET_HIP_SHUTD_ID 0x26 /* Host -> modem */
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+
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+#define SIERRA_NET_HIP_EXT_IP_IN_ID 0x0202
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+#define SIERRA_NET_HIP_EXT_IP_OUT_ID 0x0002
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+
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+/* 3G UMTS Link Sense Indication definitions */
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+#define SIERRA_NET_HIP_LSI_UMTSID 0x78
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+
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+/* Reverse Channel Grant Indication HIP message */
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+#define SIERRA_NET_HIP_RCGI 0x64
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+
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+/* LSI Protocol types */
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+#define SIERRA_NET_PROTOCOL_UMTS 0x01
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+/* LSI Coverage */
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+#define SIERRA_NET_COVERAGE_NONE 0x00
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+#define SIERRA_NET_COVERAGE_NOPACKET 0x01
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+
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+/* LSI Session */
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+#define SIERRA_NET_SESSION_IDLE 0x00
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+/* LSI Link types */
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+#define SIERRA_NET_AS_LINK_TYPE_IPv4 0x00
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+
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+struct lsi_umts {
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+ u8 protocol;
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+ u8 unused1;
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+ __be16 length;
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+ /* eventually use a union for the rest - assume umts for now */
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+ u8 coverage;
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+ u8 unused2[41];
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+ u8 session_state;
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+ u8 unused3[33];
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+ u8 link_type;
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+ u8 pdp_addr_len; /* NW-supplied PDP address len */
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+ u8 pdp_addr[16]; /* NW-supplied PDP address (bigendian)) */
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+ u8 unused4[23];
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+ u8 dns1_addr_len; /* NW-supplied 1st DNS address len (bigendian) */
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+ u8 dns1_addr[16]; /* NW-supplied 1st DNS address */
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+ u8 dns2_addr_len; /* NW-supplied 2nd DNS address len */
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+ u8 dns2_addr[16]; /* NW-supplied 2nd DNS address (bigendian)*/
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+ u8 wins1_addr_len; /* NW-supplied 1st Wins address len */
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+ u8 wins1_addr[16]; /* NW-supplied 1st Wins address (bigendian)*/
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+ u8 wins2_addr_len; /* NW-supplied 2nd Wins address len */
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+ u8 wins2_addr[16]; /* NW-supplied 2nd Wins address (bigendian) */
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+ u8 unused5[4];
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+ u8 gw_addr_len; /* NW-supplied GW address len */
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+ u8 gw_addr[16]; /* NW-supplied GW address (bigendian) */
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+ u8 reserved[8];
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+} __attribute__ ((packed));
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+
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+#define SIERRA_NET_LSI_COMMON_LEN 4
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+#define SIERRA_NET_LSI_UMTS_LEN (sizeof(struct lsi_umts))
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+#define SIERRA_NET_LSI_UMTS_STATUS_LEN \
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+ (SIERRA_NET_LSI_UMTS_LEN - SIERRA_NET_LSI_COMMON_LEN)
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+
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+/* Forward definitions */
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+static void sierra_sync_timer(unsigned long syncdata);
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+static int sierra_net_change_mtu(struct net_device *net, int new_mtu);
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+
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+/* Our own net device operations structure */
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+static const struct net_device_ops sierra_net_device_ops = {
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+ .ndo_open = usbnet_open,
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+ .ndo_stop = usbnet_stop,
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+ .ndo_start_xmit = usbnet_start_xmit,
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+ .ndo_tx_timeout = usbnet_tx_timeout,
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+ .ndo_change_mtu = sierra_net_change_mtu,
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+ .ndo_set_mac_address = eth_mac_addr,
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+ .ndo_validate_addr = eth_validate_addr,
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+};
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+
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+/* get private data associated with passed in usbnet device */
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+static inline struct sierra_net_data *sierra_net_get_private(struct usbnet *dev)
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+{
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+ return (struct sierra_net_data *)dev->data[0];
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+}
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+
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+/* set private data associated with passed in usbnet device */
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+static inline void sierra_net_set_private(struct usbnet *dev,
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+ struct sierra_net_data *priv)
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+{
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+ dev->data[0] = (unsigned long)priv;
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+}
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+
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+/* is packet IPv4 */
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+static inline int is_ip(struct sk_buff *skb)
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+{
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+ return (skb->protocol == cpu_to_be16(ETH_P_IP));
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+}
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+
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+/*
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+ * check passed in packet and make sure that:
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+ * - it is linear (no scatter/gather)
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+ * - it is ethernet (mac_header properly set)
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+ */
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+static int check_ethip_packet(struct sk_buff *skb, struct usbnet *dev)
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+{
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+ skb_reset_mac_header(skb); /* ethernet header */
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+
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+ if (skb_is_nonlinear(skb)) {
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+ netdev_err(dev->net, "Non linear buffer-dropping\n");
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+ return 0;
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+ }
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+
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+ if (!pskb_may_pull(skb, ETH_HLEN))
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+ return 0;
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+ skb->protocol = eth_hdr(skb)->h_proto;
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+
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+ return 1;
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+}
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+
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+static const u8 *save16bit(struct param *p, const u8 *datap)
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+{
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+ p->is_present = 1;
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+ p->word = get_unaligned_be16(datap);
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+ return datap + sizeof(p->word);
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+}
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+
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+static const u8 *save8bit(struct param *p, const u8 *datap)
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+{
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+ p->is_present = 1;
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+ p->byte = *datap;
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+ return datap + sizeof(p->byte);
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+}
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+
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+/*----------------------------------------------------------------------------*
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+ * BEGIN HIP *
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+ *----------------------------------------------------------------------------*/
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+/* HIP header */
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+#define SIERRA_NET_HIP_HDR_LEN 4
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+/* Extended HIP header */
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+#define SIERRA_NET_HIP_EXT_HDR_LEN 6
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+
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+struct hip_hdr {
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+ int hdrlen;
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+ struct param payload_len;
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+ struct param msgid;
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+ struct param msgspecific;
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+ struct param extmsgid;
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+};
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+
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+static int parse_hip(const u8 *buf, const u32 buflen, struct hip_hdr *hh)
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+{
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+ const u8 *curp = buf;
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+ int padded;
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+
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+ if (buflen < SIERRA_NET_HIP_HDR_LEN)
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+ return -EPROTO;
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+
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+ curp = save16bit(&hh->payload_len, curp);
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+ curp = save8bit(&hh->msgid, curp);
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+ curp = save8bit(&hh->msgspecific, curp);
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+
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+ padded = hh->msgid.byte & 0x80;
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+ hh->msgid.byte &= 0x7F; /* 7 bits */
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+
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+ hh->extmsgid.is_present = (hh->msgid.byte == SIERRA_NET_HIP_EXTENDEDID);
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+ if (hh->extmsgid.is_present) {
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+ if (buflen < SIERRA_NET_HIP_EXT_HDR_LEN)
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+ return -EPROTO;
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+
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+ hh->payload_len.word &= 0x3FFF; /* 14 bits */
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+
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+ curp = save16bit(&hh->extmsgid, curp);
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+ hh->extmsgid.word &= 0x03FF; /* 10 bits */
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+
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+ hh->hdrlen = SIERRA_NET_HIP_EXT_HDR_LEN;
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+ } else {
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+ hh->payload_len.word &= 0x07FF; /* 11 bits */
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+ hh->hdrlen = SIERRA_NET_HIP_HDR_LEN;
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+ }
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+
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+ if (padded) {
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+ hh->hdrlen++;
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+ hh->payload_len.word--;
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+ }
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+
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+ /* if real packet shorter than the claimed length */
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+ if (buflen < (hh->hdrlen + hh->payload_len.word))
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+ return -EINVAL;
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+
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+ return 0;
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+}
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+
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+static void build_hip(u8 *buf, const u16 payloadlen,
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+ struct sierra_net_data *priv)
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+{
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+ /* the following doesn't have the full functionality. We
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+ * currently build only one kind of header, so it is faster this way
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+ */
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+ put_unaligned_be16(payloadlen, buf);
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+ memcpy(buf+2, priv->tx_hdr_template, sizeof(priv->tx_hdr_template));
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+}
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+/*----------------------------------------------------------------------------*
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+ * END HIP *
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+ *----------------------------------------------------------------------------*/
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+
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+static int sierra_net_send_cmd(struct usbnet *dev,
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+ u8 *cmd, int cmdlen, const char * cmd_name)
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+{
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+ struct sierra_net_data *priv = sierra_net_get_private(dev);
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+ int status;
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+
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+ status = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
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+ USB_CDC_SEND_ENCAPSULATED_COMMAND,
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+ USB_DIR_OUT|USB_TYPE_CLASS|USB_RECIP_INTERFACE, 0,
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+ priv->ifnum, cmd, cmdlen, USB_CTRL_SET_TIMEOUT);
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+
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+ if (status != cmdlen && status != -ENODEV)
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+ netdev_err(dev->net, "Submit %s failed %d\n", cmd_name, status);
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+
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+ return status;
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+}
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+
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+static int sierra_net_send_sync(struct usbnet *dev)
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+{
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+ int status;
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+ struct sierra_net_data *priv = sierra_net_get_private(dev);
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+
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+ dev_dbg(&dev->udev->dev, "%s", __func__);
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+
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+ status = sierra_net_send_cmd(dev, priv->sync_msg,
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+ sizeof(priv->sync_msg), "SYNC");
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+
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+ return status;
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+}
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+
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+static void sierra_net_set_ctx_index(struct sierra_net_data *priv, u8 ctx_ix)
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+{
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+ dev_dbg(&(priv->usbnet->udev->dev), "%s %d", __func__, ctx_ix);
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+ priv->tx_hdr_template[0] = 0x3F;
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+ priv->tx_hdr_template[1] = ctx_ix;
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+ *((u16 *)&priv->tx_hdr_template[2]) =
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+ cpu_to_be16(SIERRA_NET_HIP_EXT_IP_OUT_ID);
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+}
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+
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+static inline int sierra_net_is_valid_addrlen(u8 len)
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+{
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+ return (len == sizeof(struct in_addr));
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+}
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+
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+static int sierra_net_parse_lsi(struct usbnet *dev, char *data, int datalen)
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+{
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+ struct lsi_umts *lsi = (struct lsi_umts *)data;
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+
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+ if (datalen < sizeof(struct lsi_umts)) {
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+ netdev_err(dev->net, "%s: Data length %d, exp %Zu\n",
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+ __func__, datalen,
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+ sizeof(struct lsi_umts));
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+ return -1;
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+ }
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+
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+ if (lsi->length != cpu_to_be16(SIERRA_NET_LSI_UMTS_STATUS_LEN)) {
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+ netdev_err(dev->net, "%s: LSI_UMTS_STATUS_LEN %d, exp %u\n",
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+ __func__, be16_to_cpu(lsi->length),
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+ (u32)SIERRA_NET_LSI_UMTS_STATUS_LEN);
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+ return -1;
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+ }
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+
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+ /* Validate the protocol - only support UMTS for now */
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+ if (lsi->protocol != SIERRA_NET_PROTOCOL_UMTS) {
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|
|
+ netdev_err(dev->net, "Protocol unsupported, 0x%02x\n",
|
|
|
+ lsi->protocol);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Validate the link type */
|
|
|
+ if (lsi->link_type != SIERRA_NET_AS_LINK_TYPE_IPv4) {
|
|
|
+ netdev_err(dev->net, "Link type unsupported: 0x%02x\n",
|
|
|
+ lsi->link_type);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Validate the coverage */
|
|
|
+ if (lsi->coverage == SIERRA_NET_COVERAGE_NONE
|
|
|
+ || lsi->coverage == SIERRA_NET_COVERAGE_NOPACKET) {
|
|
|
+ netdev_err(dev->net, "No coverage, 0x%02x\n", lsi->coverage);
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Validate the session state */
|
|
|
+ if (lsi->session_state == SIERRA_NET_SESSION_IDLE) {
|
|
|
+ netdev_err(dev->net, "Session idle, 0x%02x\n",
|
|
|
+ lsi->session_state);
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Set link_sense true */
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+static void sierra_net_handle_lsi(struct usbnet *dev, char *data,
|
|
|
+ struct hip_hdr *hh)
|
|
|
+{
|
|
|
+ struct sierra_net_data *priv = sierra_net_get_private(dev);
|
|
|
+ int link_up;
|
|
|
+
|
|
|
+ link_up = sierra_net_parse_lsi(dev, data + hh->hdrlen,
|
|
|
+ hh->payload_len.word);
|
|
|
+ if (link_up < 0) {
|
|
|
+ netdev_err(dev->net, "Invalid LSI\n");
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ if (link_up) {
|
|
|
+ sierra_net_set_ctx_index(priv, hh->msgspecific.byte);
|
|
|
+ priv->link_up = 1;
|
|
|
+ netif_carrier_on(dev->net);
|
|
|
+ } else {
|
|
|
+ priv->link_up = 0;
|
|
|
+ netif_carrier_off(dev->net);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void sierra_net_dosync(struct usbnet *dev)
|
|
|
+{
|
|
|
+ int status;
|
|
|
+ struct sierra_net_data *priv = sierra_net_get_private(dev);
|
|
|
+
|
|
|
+ dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
+
|
|
|
+ /* tell modem we are ready */
|
|
|
+ status = sierra_net_send_sync(dev);
|
|
|
+ if (status < 0)
|
|
|
+ netdev_err(dev->net,
|
|
|
+ "Send SYNC failed, status %d\n", status);
|
|
|
+ status = sierra_net_send_sync(dev);
|
|
|
+ if (status < 0)
|
|
|
+ netdev_err(dev->net,
|
|
|
+ "Send SYNC failed, status %d\n", status);
|
|
|
+
|
|
|
+ /* Now, start a timer and make sure we get the Restart Indication */
|
|
|
+ priv->sync_timer.function = sierra_sync_timer;
|
|
|
+ priv->sync_timer.data = (unsigned long) dev;
|
|
|
+ priv->sync_timer.expires = jiffies + SIERRA_NET_SYNCDELAY;
|
|
|
+ add_timer(&priv->sync_timer);
|
|
|
+}
|
|
|
+
|
|
|
+static void sierra_net_kevent(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct sierra_net_data *priv =
|
|
|
+ container_of(work, struct sierra_net_data, sierra_net_kevent);
|
|
|
+ struct usbnet *dev = priv->usbnet;
|
|
|
+ int len;
|
|
|
+ int err;
|
|
|
+ u8 *buf;
|
|
|
+ u8 ifnum;
|
|
|
+
|
|
|
+ if (test_bit(SIERRA_NET_EVENT_RESP_AVAIL, &priv->kevent_flags)) {
|
|
|
+ clear_bit(SIERRA_NET_EVENT_RESP_AVAIL, &priv->kevent_flags);
|
|
|
+
|
|
|
+ /* Query the modem for the LSI message */
|
|
|
+ buf = kzalloc(SIERRA_NET_USBCTL_BUF_LEN, GFP_KERNEL);
|
|
|
+ if (!buf) {
|
|
|
+ netdev_err(dev->net,
|
|
|
+ "failed to allocate buf for LS msg\n");
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ ifnum = priv->ifnum;
|
|
|
+ len = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
|
|
|
+ USB_CDC_GET_ENCAPSULATED_RESPONSE,
|
|
|
+ USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE,
|
|
|
+ 0, ifnum, buf, SIERRA_NET_USBCTL_BUF_LEN,
|
|
|
+ USB_CTRL_SET_TIMEOUT);
|
|
|
+
|
|
|
+ if (len < 0) {
|
|
|
+ netdev_err(dev->net,
|
|
|
+ "usb_control_msg failed, status %d\n", len);
|
|
|
+ } else {
|
|
|
+ struct hip_hdr hh;
|
|
|
+
|
|
|
+ dev_dbg(&dev->udev->dev, "%s: Received status message,"
|
|
|
+ " %04x bytes", __func__, len);
|
|
|
+
|
|
|
+ err = parse_hip(buf, len, &hh);
|
|
|
+ if (err) {
|
|
|
+ netdev_err(dev->net, "%s: Bad packet,"
|
|
|
+ " parse result %d\n", __func__, err);
|
|
|
+ kfree(buf);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Validate packet length */
|
|
|
+ if (len != hh.hdrlen + hh.payload_len.word) {
|
|
|
+ netdev_err(dev->net, "%s: Bad packet, received"
|
|
|
+ " %d, expected %d\n", __func__, len,
|
|
|
+ hh.hdrlen + hh.payload_len.word);
|
|
|
+ kfree(buf);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Switch on received message types */
|
|
|
+ switch (hh.msgid.byte) {
|
|
|
+ case SIERRA_NET_HIP_LSI_UMTSID:
|
|
|
+ dev_dbg(&dev->udev->dev, "LSI for ctx:%d",
|
|
|
+ hh.msgspecific.byte);
|
|
|
+ sierra_net_handle_lsi(dev, buf, &hh);
|
|
|
+ break;
|
|
|
+ case SIERRA_NET_HIP_RESTART_ID:
|
|
|
+ dev_dbg(&dev->udev->dev, "Restart reported: %d,"
|
|
|
+ " stopping sync timer",
|
|
|
+ hh.msgspecific.byte);
|
|
|
+ /* Got sync resp - stop timer & clear mask */
|
|
|
+ del_timer_sync(&priv->sync_timer);
|
|
|
+ clear_bit(SIERRA_NET_TIMER_EXPIRY,
|
|
|
+ &priv->kevent_flags);
|
|
|
+ break;
|
|
|
+ case SIERRA_NET_HIP_HSYNC_ID:
|
|
|
+ dev_dbg(&dev->udev->dev, "SYNC received");
|
|
|
+ err = sierra_net_send_sync(dev);
|
|
|
+ if (err < 0)
|
|
|
+ netdev_err(dev->net,
|
|
|
+ "Send SYNC failed %d\n", err);
|
|
|
+ break;
|
|
|
+ case SIERRA_NET_HIP_EXTENDEDID:
|
|
|
+ netdev_err(dev->net, "Unrecognized HIP msg, "
|
|
|
+ "extmsgid 0x%04x\n", hh.extmsgid.word);
|
|
|
+ break;
|
|
|
+ case SIERRA_NET_HIP_RCGI:
|
|
|
+ /* Ignored */
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ netdev_err(dev->net, "Unrecognized HIP msg, "
|
|
|
+ "msgid 0x%02x\n", hh.msgid.byte);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ kfree(buf);
|
|
|
+ }
|
|
|
+ /* The sync timer bit might be set */
|
|
|
+ if (test_bit(SIERRA_NET_TIMER_EXPIRY, &priv->kevent_flags)) {
|
|
|
+ clear_bit(SIERRA_NET_TIMER_EXPIRY, &priv->kevent_flags);
|
|
|
+ dev_dbg(&dev->udev->dev, "Deferred sync timer expiry");
|
|
|
+ sierra_net_dosync(priv->usbnet);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (priv->kevent_flags)
|
|
|
+ dev_dbg(&dev->udev->dev, "sierra_net_kevent done, "
|
|
|
+ "kevent_flags = 0x%lx", priv->kevent_flags);
|
|
|
+}
|
|
|
+
|
|
|
+static void sierra_net_defer_kevent(struct usbnet *dev, int work)
|
|
|
+{
|
|
|
+ struct sierra_net_data *priv = sierra_net_get_private(dev);
|
|
|
+
|
|
|
+ set_bit(work, &priv->kevent_flags);
|
|
|
+ schedule_work(&priv->sierra_net_kevent);
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Sync Retransmit Timer Handler. On expiry, kick the work queue
|
|
|
+ */
|
|
|
+void sierra_sync_timer(unsigned long syncdata)
|
|
|
+{
|
|
|
+ struct usbnet *dev = (struct usbnet *)syncdata;
|
|
|
+
|
|
|
+ dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
+ /* Kick the tasklet */
|
|
|
+ sierra_net_defer_kevent(dev, SIERRA_NET_TIMER_EXPIRY);
|
|
|
+}
|
|
|
+
|
|
|
+static void sierra_net_status(struct usbnet *dev, struct urb *urb)
|
|
|
+{
|
|
|
+ struct usb_cdc_notification *event;
|
|
|
+
|
|
|
+ dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
+
|
|
|
+ if (urb->actual_length < sizeof *event)
|
|
|
+ return;
|
|
|
+
|
|
|
+ /* Add cases to handle other standard notifications. */
|
|
|
+ event = urb->transfer_buffer;
|
|
|
+ switch (event->bNotificationType) {
|
|
|
+ case USB_CDC_NOTIFY_NETWORK_CONNECTION:
|
|
|
+ case USB_CDC_NOTIFY_SPEED_CHANGE:
|
|
|
+ /* USB 305 sends those */
|
|
|
+ break;
|
|
|
+ case USB_CDC_NOTIFY_RESPONSE_AVAILABLE:
|
|
|
+ sierra_net_defer_kevent(dev, SIERRA_NET_EVENT_RESP_AVAIL);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ netdev_err(dev->net, ": unexpected notification %02x!\n",
|
|
|
+ event->bNotificationType);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void sierra_net_get_drvinfo(struct net_device *net,
|
|
|
+ struct ethtool_drvinfo *info)
|
|
|
+{
|
|
|
+ /* Inherit standard device info */
|
|
|
+ usbnet_get_drvinfo(net, info);
|
|
|
+ strncpy(info->driver, driver_name, sizeof info->driver);
|
|
|
+ strncpy(info->version, DRIVER_VERSION, sizeof info->version);
|
|
|
+}
|
|
|
+
|
|
|
+static u32 sierra_net_get_link(struct net_device *net)
|
|
|
+{
|
|
|
+ struct usbnet *dev = netdev_priv(net);
|
|
|
+ /* Report link is down whenever the interface is down */
|
|
|
+ return sierra_net_get_private(dev)->link_up && netif_running(net);
|
|
|
+}
|
|
|
+
|
|
|
+static struct ethtool_ops sierra_net_ethtool_ops = {
|
|
|
+ .get_drvinfo = sierra_net_get_drvinfo,
|
|
|
+ .get_link = sierra_net_get_link,
|
|
|
+ .get_msglevel = usbnet_get_msglevel,
|
|
|
+ .set_msglevel = usbnet_set_msglevel,
|
|
|
+ .get_settings = usbnet_get_settings,
|
|
|
+ .set_settings = usbnet_set_settings,
|
|
|
+ .nway_reset = usbnet_nway_reset,
|
|
|
+};
|
|
|
+
|
|
|
+/* MTU can not be more than 1500 bytes, enforce it. */
|
|
|
+static int sierra_net_change_mtu(struct net_device *net, int new_mtu)
|
|
|
+{
|
|
|
+ if (new_mtu > SIERRA_NET_MAX_SUPPORTED_MTU)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ return usbnet_change_mtu(net, new_mtu);
|
|
|
+}
|
|
|
+
|
|
|
+static int is_whitelisted(const u8 ifnum,
|
|
|
+ const struct sierra_net_iface_info *whitelist)
|
|
|
+{
|
|
|
+ if (whitelist) {
|
|
|
+ const u8 *list = whitelist->ifaceinfo;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < whitelist->infolen; i++) {
|
|
|
+ if (list[i] == ifnum)
|
|
|
+ return 1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int sierra_net_get_fw_attr(struct usbnet *dev, u16 *datap)
|
|
|
+{
|
|
|
+ int result = 0;
|
|
|
+ u16 *attrdata;
|
|
|
+
|
|
|
+ attrdata = kmalloc(sizeof(*attrdata), GFP_KERNEL);
|
|
|
+ if (!attrdata)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ result = usb_control_msg(
|
|
|
+ dev->udev,
|
|
|
+ usb_rcvctrlpipe(dev->udev, 0),
|
|
|
+ /* _u8 vendor specific request */
|
|
|
+ SWI_USB_REQUEST_GET_FW_ATTR,
|
|
|
+ USB_DIR_IN | USB_TYPE_VENDOR, /* __u8 request type */
|
|
|
+ 0x0000, /* __u16 value not used */
|
|
|
+ 0x0000, /* __u16 index not used */
|
|
|
+ attrdata, /* char *data */
|
|
|
+ sizeof(*attrdata), /* __u16 size */
|
|
|
+ USB_CTRL_SET_TIMEOUT); /* int timeout */
|
|
|
+
|
|
|
+ if (result < 0) {
|
|
|
+ kfree(attrdata);
|
|
|
+ return -EIO;
|
|
|
+ }
|
|
|
+
|
|
|
+ *datap = *attrdata;
|
|
|
+
|
|
|
+ kfree(attrdata);
|
|
|
+ return result;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * collects the bulk endpoints, the status endpoint.
|
|
|
+ */
|
|
|
+static int sierra_net_bind(struct usbnet *dev, struct usb_interface *intf)
|
|
|
+{
|
|
|
+ u8 ifacenum;
|
|
|
+ u8 numendpoints;
|
|
|
+ u16 fwattr = 0;
|
|
|
+ int status;
|
|
|
+ struct ethhdr *eth;
|
|
|
+ struct sierra_net_data *priv;
|
|
|
+ static const u8 sync_tmplate[sizeof(priv->sync_msg)] = {
|
|
|
+ 0x00, 0x00, SIERRA_NET_HIP_MSYNC_ID, 0x00};
|
|
|
+ static const u8 shdwn_tmplate[sizeof(priv->shdwn_msg)] = {
|
|
|
+ 0x00, 0x00, SIERRA_NET_HIP_SHUTD_ID, 0x00};
|
|
|
+
|
|
|
+ struct sierra_net_info_data *data =
|
|
|
+ (struct sierra_net_info_data *)dev->driver_info->data;
|
|
|
+
|
|
|
+ dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
+
|
|
|
+ ifacenum = intf->cur_altsetting->desc.bInterfaceNumber;
|
|
|
+ /* We only accept certain interfaces */
|
|
|
+ if (!is_whitelisted(ifacenum, &data->whitelist)) {
|
|
|
+ dev_dbg(&dev->udev->dev, "Ignoring interface: %d", ifacenum);
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+ numendpoints = intf->cur_altsetting->desc.bNumEndpoints;
|
|
|
+ /* We have three endpoints, bulk in and out, and a status */
|
|
|
+ if (numendpoints != 3) {
|
|
|
+ dev_err(&dev->udev->dev, "Expected 3 endpoints, found: %d",
|
|
|
+ numendpoints);
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+ /* Status endpoint set in usbnet_get_endpoints() */
|
|
|
+ dev->status = NULL;
|
|
|
+ status = usbnet_get_endpoints(dev, intf);
|
|
|
+ if (status < 0) {
|
|
|
+ dev_err(&dev->udev->dev, "Error in usbnet_get_endpoints (%d)",
|
|
|
+ status);
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+ /* Initialize sierra private data */
|
|
|
+ priv = kzalloc(sizeof *priv, GFP_KERNEL);
|
|
|
+ if (!priv) {
|
|
|
+ dev_err(&dev->udev->dev, "No memory");
|
|
|
+ return -ENOMEM;
|
|
|
+ }
|
|
|
+
|
|
|
+ priv->usbnet = dev;
|
|
|
+ priv->ifnum = ifacenum;
|
|
|
+ dev->net->netdev_ops = &sierra_net_device_ops;
|
|
|
+
|
|
|
+ /* change MAC addr to include, ifacenum, and to be unique */
|
|
|
+ dev->net->dev_addr[ETH_ALEN-2] = atomic_inc_return(&iface_counter);
|
|
|
+ dev->net->dev_addr[ETH_ALEN-1] = ifacenum;
|
|
|
+
|
|
|
+ /* we will have to manufacture ethernet headers, prepare template */
|
|
|
+ eth = (struct ethhdr *)priv->ethr_hdr_tmpl;
|
|
|
+ memcpy(ð->h_dest, dev->net->dev_addr, ETH_ALEN);
|
|
|
+ eth->h_proto = cpu_to_be16(ETH_P_IP);
|
|
|
+
|
|
|
+ /* prepare shutdown message template */
|
|
|
+ memcpy(priv->shdwn_msg, shdwn_tmplate, sizeof(priv->shdwn_msg));
|
|
|
+ /* set context index initially to 0 - prepares tx hdr template */
|
|
|
+ sierra_net_set_ctx_index(priv, 0);
|
|
|
+
|
|
|
+ /* decrease the rx_urb_size and max_tx_size to 4k on USB 1.1 */
|
|
|
+ dev->rx_urb_size = data->rx_urb_size;
|
|
|
+ if (dev->udev->speed != USB_SPEED_HIGH)
|
|
|
+ dev->rx_urb_size = min_t(size_t, 4096, data->rx_urb_size);
|
|
|
+
|
|
|
+ dev->net->hard_header_len += SIERRA_NET_HIP_EXT_HDR_LEN;
|
|
|
+ dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
|
|
|
+
|
|
|
+ /* Set up the netdev */
|
|
|
+ dev->net->flags |= IFF_NOARP;
|
|
|
+ dev->net->ethtool_ops = &sierra_net_ethtool_ops;
|
|
|
+ netif_carrier_off(dev->net);
|
|
|
+
|
|
|
+ sierra_net_set_private(dev, priv);
|
|
|
+
|
|
|
+ priv->kevent_flags = 0;
|
|
|
+
|
|
|
+ /* Use the shared workqueue */
|
|
|
+ INIT_WORK(&priv->sierra_net_kevent, sierra_net_kevent);
|
|
|
+
|
|
|
+ /* Only need to do this once */
|
|
|
+ init_timer(&priv->sync_timer);
|
|
|
+
|
|
|
+ /* verify fw attributes */
|
|
|
+ status = sierra_net_get_fw_attr(dev, &fwattr);
|
|
|
+ dev_dbg(&dev->udev->dev, "Fw attr: %x\n", fwattr);
|
|
|
+
|
|
|
+ /* test whether firmware supports DHCP */
|
|
|
+ if (!(status == sizeof(fwattr) && (fwattr & SWI_GET_FW_ATTR_MASK))) {
|
|
|
+ /* found incompatible firmware version */
|
|
|
+ dev_err(&dev->udev->dev, "Incompatible driver and firmware"
|
|
|
+ " versions\n");
|
|
|
+ kfree(priv);
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+ /* prepare sync message from template */
|
|
|
+ memcpy(priv->sync_msg, sync_tmplate, sizeof(priv->sync_msg));
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void sierra_net_unbind(struct usbnet *dev, struct usb_interface *intf)
|
|
|
+{
|
|
|
+ int status;
|
|
|
+ struct sierra_net_data *priv = sierra_net_get_private(dev);
|
|
|
+
|
|
|
+ dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
+
|
|
|
+ /* Kill the timer then flush the work queue */
|
|
|
+ del_timer_sync(&priv->sync_timer);
|
|
|
+
|
|
|
+ flush_scheduled_work();
|
|
|
+
|
|
|
+ /* tell modem we are going away */
|
|
|
+ status = sierra_net_send_cmd(dev, priv->shdwn_msg,
|
|
|
+ sizeof(priv->shdwn_msg), "Shutdown");
|
|
|
+ if (status < 0)
|
|
|
+ netdev_err(dev->net,
|
|
|
+ "usb_control_msg failed, status %d\n", status);
|
|
|
+
|
|
|
+ sierra_net_set_private(dev, NULL);
|
|
|
+
|
|
|
+ kfree(priv);
|
|
|
+}
|
|
|
+
|
|
|
+static struct sk_buff *sierra_net_skb_clone(struct usbnet *dev,
|
|
|
+ struct sk_buff *skb, int len)
|
|
|
+{
|
|
|
+ struct sk_buff *new_skb;
|
|
|
+
|
|
|
+ /* clone skb */
|
|
|
+ new_skb = skb_clone(skb, GFP_ATOMIC);
|
|
|
+
|
|
|
+ /* remove len bytes from original */
|
|
|
+ skb_pull(skb, len);
|
|
|
+
|
|
|
+ /* trim next packet to it's length */
|
|
|
+ if (new_skb) {
|
|
|
+ skb_trim(new_skb, len);
|
|
|
+ } else {
|
|
|
+ if (netif_msg_rx_err(dev))
|
|
|
+ netdev_err(dev->net, "failed to get skb\n");
|
|
|
+ dev->net->stats.rx_dropped++;
|
|
|
+ }
|
|
|
+
|
|
|
+ return new_skb;
|
|
|
+}
|
|
|
+
|
|
|
+/* ---------------------------- Receive data path ----------------------*/
|
|
|
+static int sierra_net_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
|
|
|
+{
|
|
|
+ int err;
|
|
|
+ struct hip_hdr hh;
|
|
|
+ struct sk_buff *new_skb;
|
|
|
+
|
|
|
+ dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
+
|
|
|
+ /* could contain multiple packets */
|
|
|
+ while (likely(skb->len)) {
|
|
|
+ err = parse_hip(skb->data, skb->len, &hh);
|
|
|
+ if (err) {
|
|
|
+ if (netif_msg_rx_err(dev))
|
|
|
+ netdev_err(dev->net, "Invalid HIP header %d\n",
|
|
|
+ err);
|
|
|
+ /* dev->net->stats.rx_errors incremented by caller */
|
|
|
+ dev->net->stats.rx_length_errors++;
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Validate Extended HIP header */
|
|
|
+ if (!hh.extmsgid.is_present
|
|
|
+ || hh.extmsgid.word != SIERRA_NET_HIP_EXT_IP_IN_ID) {
|
|
|
+ if (netif_msg_rx_err(dev))
|
|
|
+ netdev_err(dev->net, "HIP/ETH: Invalid pkt\n");
|
|
|
+
|
|
|
+ dev->net->stats.rx_frame_errors++;
|
|
|
+ /* dev->net->stats.rx_errors incremented by caller */;
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ skb_pull(skb, hh.hdrlen);
|
|
|
+
|
|
|
+ /* We are going to accept this packet, prepare it */
|
|
|
+ memcpy(skb->data, sierra_net_get_private(dev)->ethr_hdr_tmpl,
|
|
|
+ ETH_HLEN);
|
|
|
+
|
|
|
+ /* Last packet in batch handled by usbnet */
|
|
|
+ if (hh.payload_len.word == skb->len)
|
|
|
+ return 1;
|
|
|
+
|
|
|
+ new_skb = sierra_net_skb_clone(dev, skb, hh.payload_len.word);
|
|
|
+ if (new_skb)
|
|
|
+ usbnet_skb_return(dev, new_skb);
|
|
|
+
|
|
|
+ } /* while */
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/* ---------------------------- Transmit data path ----------------------*/
|
|
|
+struct sk_buff *sierra_net_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
|
|
|
+ gfp_t flags)
|
|
|
+{
|
|
|
+ struct sierra_net_data *priv = sierra_net_get_private(dev);
|
|
|
+ u16 len;
|
|
|
+ bool need_tail;
|
|
|
+
|
|
|
+ dev_dbg(&dev->udev->dev, "%s", __func__);
|
|
|
+ if (priv->link_up && check_ethip_packet(skb, dev) && is_ip(skb)) {
|
|
|
+ /* enough head room as is? */
|
|
|
+ if (SIERRA_NET_HIP_EXT_HDR_LEN <= skb_headroom(skb)) {
|
|
|
+ /* Save the Eth/IP length and set up HIP hdr */
|
|
|
+ len = skb->len;
|
|
|
+ skb_push(skb, SIERRA_NET_HIP_EXT_HDR_LEN);
|
|
|
+ /* Handle ZLP issue */
|
|
|
+ need_tail = ((len + SIERRA_NET_HIP_EXT_HDR_LEN)
|
|
|
+ % dev->maxpacket == 0);
|
|
|
+ if (need_tail) {
|
|
|
+ if (unlikely(skb_tailroom(skb) == 0)) {
|
|
|
+ netdev_err(dev->net, "tx_fixup:"
|
|
|
+ "no room for packet\n");
|
|
|
+ dev_kfree_skb_any(skb);
|
|
|
+ return NULL;
|
|
|
+ } else {
|
|
|
+ skb->data[skb->len] = 0;
|
|
|
+ __skb_put(skb, 1);
|
|
|
+ len = len + 1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ build_hip(skb->data, len, priv);
|
|
|
+ return skb;
|
|
|
+ } else {
|
|
|
+ /*
|
|
|
+ * compensate in the future if necessary
|
|
|
+ */
|
|
|
+ netdev_err(dev->net, "tx_fixup: no room for HIP\n");
|
|
|
+ } /* headroom */
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!priv->link_up)
|
|
|
+ dev->net->stats.tx_carrier_errors++;
|
|
|
+
|
|
|
+ /* tx_dropped incremented by usbnet */
|
|
|
+
|
|
|
+ /* filter the packet out, release it */
|
|
|
+ dev_kfree_skb_any(skb);
|
|
|
+ return NULL;
|
|
|
+}
|
|
|
+
|
|
|
+static const u8 sierra_net_ifnum_list[] = { 7, 10, 11 };
|
|
|
+static const struct sierra_net_info_data sierra_net_info_data_68A3 = {
|
|
|
+ .rx_urb_size = 8 * 1024,
|
|
|
+ .whitelist = {
|
|
|
+ .infolen = ARRAY_SIZE(sierra_net_ifnum_list),
|
|
|
+ .ifaceinfo = sierra_net_ifnum_list
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+static const struct driver_info sierra_net_info_68A3 = {
|
|
|
+ .description = "Sierra Wireless USB-to-WWAN Modem",
|
|
|
+ .flags = FLAG_WWAN | FLAG_SEND_ZLP,
|
|
|
+ .bind = sierra_net_bind,
|
|
|
+ .unbind = sierra_net_unbind,
|
|
|
+ .status = sierra_net_status,
|
|
|
+ .rx_fixup = sierra_net_rx_fixup,
|
|
|
+ .tx_fixup = sierra_net_tx_fixup,
|
|
|
+ .data = (unsigned long)&sierra_net_info_data_68A3,
|
|
|
+};
|
|
|
+
|
|
|
+static const struct usb_device_id products[] = {
|
|
|
+ {USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless USB-to-WWAN modem */
|
|
|
+ .driver_info = (unsigned long) &sierra_net_info_68A3},
|
|
|
+
|
|
|
+ {}, /* last item */
|
|
|
+};
|
|
|
+MODULE_DEVICE_TABLE(usb, products);
|
|
|
+
|
|
|
+/* We are based on usbnet, so let it handle the USB driver specifics */
|
|
|
+static struct usb_driver sierra_net_driver = {
|
|
|
+ .name = "sierra_net",
|
|
|
+ .id_table = products,
|
|
|
+ .probe = usbnet_probe,
|
|
|
+ .disconnect = usbnet_disconnect,
|
|
|
+ .suspend = usbnet_suspend,
|
|
|
+ .resume = usbnet_resume,
|
|
|
+ .no_dynamic_id = 1,
|
|
|
+};
|
|
|
+
|
|
|
+static int __init sierra_net_init(void)
|
|
|
+{
|
|
|
+ BUILD_BUG_ON(FIELD_SIZEOF(struct usbnet, data)
|
|
|
+ < sizeof(struct cdc_state));
|
|
|
+
|
|
|
+ return usb_register(&sierra_net_driver);
|
|
|
+}
|
|
|
+
|
|
|
+static void __exit sierra_net_exit(void)
|
|
|
+{
|
|
|
+ usb_deregister(&sierra_net_driver);
|
|
|
+}
|
|
|
+
|
|
|
+module_exit(sierra_net_exit);
|
|
|
+module_init(sierra_net_init);
|
|
|
+
|
|
|
+MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
|
+MODULE_DESCRIPTION(DRIVER_DESC);
|
|
|
+MODULE_VERSION(DRIVER_VERSION);
|
|
|
+MODULE_LICENSE("GPL");
|