at76c50x-usb: add driver

This is a driver for usb devices based on at76c50x chipset. This is
a mac80211 port of the original at76_usb driver.

Signed-off-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/Kconfig

@@ -228,6 +228,14 @@ config PCMCIA_ATMEL
 	  Enable support for PCMCIA cards containing the
 	  Atmel at76c502 and at76c504 chips.
 
+config AT76C50X_USB
+        tristate "Atmel at76c503/at76c505/at76c505a USB cards"
+        depends on MAC80211 && WLAN_80211 && USB
+        select FW_LOADER
+        ---help---
+          Enable support for USB Wireless devices using Atmel at76c503,
+          at76c505 or at76c505a chips.
+
 config AIRO_CS
 	tristate "Cisco/Aironet 34X/35X/4500/4800 PCMCIA cards"
 	depends on PCMCIA && (BROKEN || !M32R) && WLAN_80211

drivers/net/wireless/Makefile

@@ -24,6 +24,8 @@ obj-$(CONFIG_ATMEL)             += atmel.o
 obj-$(CONFIG_PCI_ATMEL)         += atmel_pci.o 
 obj-$(CONFIG_PCMCIA_ATMEL)      += atmel_cs.o
 
+obj-$(CONFIG_AT76C50X_USB)      += at76c50x-usb.o
+
 obj-$(CONFIG_PRISM54)		+= prism54/
 
 obj-$(CONFIG_HOSTAP)		+= hostap/

drivers/net/wireless/at76c50x-usb.h

+/*
+ * Copyright (c) 2002,2003 Oliver Kurth
+ *	     (c) 2003,2004 Joerg Albert <joerg.albert@gmx.de>
+ *	     (c) 2007 Guido Guenther <agx@sigxcpu.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This driver was based on information from the Sourceforge driver
+ * released and maintained by Atmel:
+ *
+ *  http://sourceforge.net/projects/atmelwlandriver/
+ *
+ * Although the code was completely re-written,
+ * it would have been impossible without Atmel's decision to
+ * release an Open Source driver (unfortunately the firmware was
+ * kept binary only). Thanks for that decision to Atmel!
+ */
+
+#ifndef _AT76_USB_H
+#define _AT76_USB_H
+
+/* Board types */
+enum board_type {
+	BOARD_503_ISL3861 = 1,
+	BOARD_503_ISL3863 = 2,
+	BOARD_503 = 3,
+	BOARD_503_ACC = 4,
+	BOARD_505 = 5,
+	BOARD_505_2958 = 6,
+	BOARD_505A = 7,
+	BOARD_505AMX = 8
+};
+
+#define CMD_STATUS_IDLE				0x00
+#define CMD_STATUS_COMPLETE			0x01
+#define CMD_STATUS_UNKNOWN			0x02
+#define CMD_STATUS_INVALID_PARAMETER		0x03
+#define CMD_STATUS_FUNCTION_NOT_SUPPORTED	0x04
+#define CMD_STATUS_TIME_OUT			0x07
+#define CMD_STATUS_IN_PROGRESS			0x08
+#define CMD_STATUS_HOST_FAILURE			0xff
+#define CMD_STATUS_SCAN_FAILED			0xf0
+
+/* answers to get op mode */
+#define OPMODE_NONE				0x00
+#define OPMODE_NORMAL_NIC_WITH_FLASH		0x01
+#define OPMODE_HW_CONFIG_MODE			0x02
+#define OPMODE_DFU_MODE_WITH_FLASH		0x03
+#define OPMODE_NORMAL_NIC_WITHOUT_FLASH		0x04
+
+#define CMD_SET_MIB		0x01
+#define CMD_GET_MIB		0x02
+#define CMD_SCAN		0x03
+#define CMD_JOIN		0x04
+#define CMD_START_IBSS		0x05
+#define CMD_RADIO_ON		0x06
+#define CMD_RADIO_OFF		0x07
+#define CMD_STARTUP		0x0B
+
+#define MIB_LOCAL		0x01
+#define MIB_MAC_ADDR		0x02
+#define MIB_MAC			0x03
+#define MIB_MAC_MGMT		0x05
+#define MIB_MAC_WEP		0x06
+#define MIB_PHY			0x07
+#define MIB_FW_VERSION		0x08
+#define MIB_MDOMAIN		0x09
+
+#define ADHOC_MODE		1
+#define INFRASTRUCTURE_MODE	2
+
+/* values for struct mib_local, field preamble_type */
+#define PREAMBLE_TYPE_LONG	0
+#define PREAMBLE_TYPE_SHORT	1
+#define PREAMBLE_TYPE_AUTO	2
+
+/* values for tx_rate */
+#define TX_RATE_1MBIT		0
+#define TX_RATE_2MBIT		1
+#define TX_RATE_5_5MBIT 	2
+#define TX_RATE_11MBIT		3
+#define TX_RATE_AUTO		4
+
+/* power management modes */
+#define AT76_PM_OFF		1
+#define AT76_PM_ON		2
+#define AT76_PM_SMART		3
+
+struct hwcfg_r505 {
+	u8 cr39_values[14];
+	u8 reserved1[14];
+	u8 bb_cr[14];
+	u8 pidvid[4];
+	u8 mac_addr[ETH_ALEN];
+	u8 regulatory_domain;
+	u8 reserved2[14];
+	u8 cr15_values[14];
+	u8 reserved3[3];
+} __attribute__((packed));
+
+struct hwcfg_rfmd {
+	u8 cr20_values[14];
+	u8 cr21_values[14];
+	u8 bb_cr[14];
+	u8 pidvid[4];
+	u8 mac_addr[ETH_ALEN];
+	u8 regulatory_domain;
+	u8 low_power_values[14];
+	u8 normal_power_values[14];
+	u8 reserved1[3];
+} __attribute__((packed));
+
+struct hwcfg_intersil {
+	u8 mac_addr[ETH_ALEN];
+	u8 cr31_values[14];
+	u8 cr58_values[14];
+	u8 pidvid[4];
+	u8 regulatory_domain;
+	u8 reserved[1];
+} __attribute__((packed));
+
+union at76_hwcfg {
+	struct hwcfg_intersil i;
+	struct hwcfg_rfmd r3;
+	struct hwcfg_r505 r5;
+};
+
+#define WEP_SMALL_KEY_LEN	(40 / 8)
+#define WEP_LARGE_KEY_LEN	(104 / 8)
+#define WEP_KEYS		(4)
+
+struct at76_card_config {
+	u8 exclude_unencrypted;
+	u8 promiscuous_mode;
+	u8 short_retry_limit;
+	u8 encryption_type;
+	__le16 rts_threshold;
+	__le16 fragmentation_threshold;	/* 256..2346 */
+	u8 basic_rate_set[4];
+	u8 auto_rate_fallback;	/* 0,1 */
+	u8 channel;
+	u8 privacy_invoked;
+	u8 wep_default_key_id;	/* 0..3 */
+	u8 current_ssid[32];
+	u8 wep_default_key_value[4][WEP_LARGE_KEY_LEN];
+	u8 ssid_len;
+	u8 short_preamble;
+	__le16 beacon_period;
+} __attribute__((packed));
+
+struct at76_command {
+	u8 cmd;
+	u8 reserved;
+	__le16 size;
+	u8 data[0];
+} __attribute__((packed));
+
+/* Length of Atmel-specific Rx header before 802.11 frame */
+#define AT76_RX_HDRLEN offsetof(struct at76_rx_buffer, packet)
+
+struct at76_rx_buffer {
+	__le16 wlength;
+	u8 rx_rate;
+	u8 newbss;
+	u8 fragmentation;
+	u8 rssi;
+	u8 link_quality;
+	u8 noise_level;
+	__le32 rx_time;
+	u8 packet[IEEE80211_MAX_FRAG_THRESHOLD];
+} __attribute__((packed));
+
+/* Length of Atmel-specific Tx header before 802.11 frame */
+#define AT76_TX_HDRLEN offsetof(struct at76_tx_buffer, packet)
+
+struct at76_tx_buffer {
+	__le16 wlength;
+	u8 tx_rate;
+	u8 padding;
+	u8 reserved[4];
+	u8 packet[IEEE80211_MAX_FRAG_THRESHOLD];
+} __attribute__((packed));
+
+/* defines for scan_type below */
+#define SCAN_TYPE_ACTIVE	0
+#define SCAN_TYPE_PASSIVE	1
+
+struct at76_req_scan {
+	u8 bssid[ETH_ALEN];
+	u8 essid[32];
+	u8 scan_type;
+	u8 channel;
+	__le16 probe_delay;
+	__le16 min_channel_time;
+	__le16 max_channel_time;
+	u8 essid_size;
+	u8 international_scan;
+} __attribute__((packed));
+
+struct at76_req_ibss {
+	u8 bssid[ETH_ALEN];
+	u8 essid[32];
+	u8 bss_type;
+	u8 channel;
+	u8 essid_size;
+	u8 reserved[3];
+} __attribute__((packed));
+
+struct at76_req_join {
+	u8 bssid[ETH_ALEN];
+	u8 essid[32];
+	u8 bss_type;
+	u8 channel;
+	__le16 timeout;
+	u8 essid_size;
+	u8 reserved;
+} __attribute__((packed));
+
+struct set_mib_buffer {
+	u8 type;
+	u8 size;
+	u8 index;
+	u8 reserved;
+	union {
+		u8 byte;
+		__le16 word;
+		u8 addr[ETH_ALEN];
+	} data;
+} __attribute__((packed));
+
+struct mib_local {
+	u16 reserved0;
+	u8 beacon_enable;
+	u8 txautorate_fallback;
+	u8 reserved1;
+	u8 ssid_size;
+	u8 promiscuous_mode;
+	u16 reserved2;
+	u8 preamble_type;
+	u16 reserved3;
+} __attribute__((packed));
+
+struct mib_mac_addr {
+	u8 mac_addr[ETH_ALEN];
+	u8 res[2];		/* ??? */
+	u8 group_addr[4][ETH_ALEN];
+	u8 group_addr_status[4];
+} __attribute__((packed));
+
+struct mib_mac {
+	__le32 max_tx_msdu_lifetime;
+	__le32 max_rx_lifetime;
+	__le16 frag_threshold;
+	__le16 rts_threshold;
+	__le16 cwmin;
+	__le16 cwmax;
+	u8 short_retry_time;
+	u8 long_retry_time;
+	u8 scan_type;		/* active or passive */
+	u8 scan_channel;
+	__le16 probe_delay;	/* delay before ProbeReq in active scan, RO */
+	__le16 min_channel_time;
+	__le16 max_channel_time;
+	__le16 listen_interval;
+	u8 desired_ssid[32];
+	u8 desired_bssid[ETH_ALEN];
+	u8 desired_bsstype;	/* ad-hoc or infrastructure */
+	u8 reserved2;
+} __attribute__((packed));
+
+struct mib_mac_mgmt {
+	__le16 beacon_period;
+	__le16 CFP_max_duration;
+	__le16 medium_occupancy_limit;
+	__le16 station_id;	/* assoc id */
+	__le16 ATIM_window;
+	u8 CFP_mode;
+	u8 privacy_option_implemented;
+	u8 DTIM_period;
+	u8 CFP_period;
+	u8 current_bssid[ETH_ALEN];
+	u8 current_essid[32];
+	u8 current_bss_type;
+	u8 power_mgmt_mode;
+	/* rfmd and 505 */
+	u8 ibss_change;
+	u8 res;
+	u8 multi_domain_capability_implemented;
+	u8 multi_domain_capability_enabled;
+	u8 country_string[3];
+	u8 reserved[3];
+} __attribute__((packed));
+
+struct mib_mac_wep {
+	u8 privacy_invoked;	/* 0 disable encr., 1 enable encr */
+	u8 wep_default_key_id;
+	u8 wep_key_mapping_len;
+	u8 exclude_unencrypted;
+	__le32 wep_icv_error_count;
+	__le32 wep_excluded_count;
+	u8 wep_default_keyvalue[WEP_KEYS][WEP_LARGE_KEY_LEN];
+	u8 encryption_level;	/* 1 for 40bit, 2 for 104bit encryption */
+} __attribute__((packed));
+
+struct mib_phy {
+	__le32 ed_threshold;
+
+	__le16 slot_time;
+	__le16 sifs_time;
+	__le16 preamble_length;
+	__le16 plcp_header_length;
+	__le16 mpdu_max_length;
+	__le16 cca_mode_supported;
+
+	u8 operation_rate_set[4];
+	u8 channel_id;
+	u8 current_cca_mode;
+	u8 phy_type;
+	u8 current_reg_domain;
+} __attribute__((packed));
+
+struct mib_fw_version {
+	u8 major;
+	u8 minor;
+	u8 patch;
+	u8 build;
+} __attribute__((packed));
+
+struct mib_mdomain {
+	u8 tx_powerlevel[14];
+	u8 channel_list[14];	/* 0 for invalid channels */
+} __attribute__((packed));
+
+struct at76_fw_header {
+	__le32 crc;		/* CRC32 of the whole image */
+	__le32 board_type;	/* firmware compatibility code */
+	u8 build;		/* firmware build number */
+	u8 patch;		/* firmware patch level */
+	u8 minor;		/* firmware minor version */
+	u8 major;		/* firmware major version */
+	__le32 str_offset;	/* offset of the copyright string */
+	__le32 int_fw_offset;	/* internal firmware image offset */
+	__le32 int_fw_len;	/* internal firmware image length */
+	__le32 ext_fw_offset;	/* external firmware image offset */
+	__le32 ext_fw_len;	/* external firmware image length */
+} __attribute__((packed));
+
+/* a description of a regulatory domain and the allowed channels */
+struct reg_domain {
+	u16 code;
+	char const *name;
+	u32 channel_map;	/* if bit N is set, channel (N+1) is allowed */
+};
+
+/* Data for one loaded firmware file */
+struct fwentry {
+	const char *const fwname;
+	const struct firmware *fw;
+	int extfw_size;
+	int intfw_size;
+	/* pointer to loaded firmware, no need to free */
+	u8 *extfw;		/* external firmware, extfw_size bytes long */
+	u8 *intfw;		/* internal firmware, intfw_size bytes long */
+	enum board_type board_type;	/* board type */
+	struct mib_fw_version fw_version;
+	int loaded;		/* Loaded and parsed successfully */
+};
+
+struct at76_priv {
+	struct usb_device *udev;	/* USB device pointer */
+
+	struct sk_buff *rx_skb;	/* skbuff for receiving data */
+	struct sk_buff *tx_skb;	/* skbuff for transmitting data */
+	void *bulk_out_buffer;	/* buffer for sending data */
+
+	struct urb *tx_urb;	/* URB for sending data */
+	struct urb *rx_urb;	/* URB for receiving data */
+
+	unsigned int tx_pipe;	/* bulk out pipe */
+	unsigned int rx_pipe;	/* bulk in pipe */
+
+	struct mutex mtx;	/* locks this structure */
+
+	/* work queues */
+	struct work_struct work_set_promisc;
+	struct work_struct work_submit_rx;
+	struct delayed_work dwork_hw_scan;
+
+	struct tasklet_struct rx_tasklet;
+
+	/* the WEP stuff */
+	int wep_enabled;	/* 1 if WEP is enabled */
+	int wep_key_id;		/* key id to be used */
+	u8 wep_keys[WEP_KEYS][WEP_LARGE_KEY_LEN];	/* WEP keys */
+	u8 wep_keys_len[WEP_KEYS];	/* length of WEP keys */
+
+	int channel;
+	int iw_mode;
+	u8 bssid[ETH_ALEN];
+	u8 essid[IW_ESSID_MAX_SIZE];
+	int essid_size;
+	int radio_on;
+	int promisc;
+
+	int preamble_type;	/* 0 - long, 1 - short, 2 - auto */
+	int auth_mode;		/* authentication type: 0 open, 1 shared key */
+	int txrate;		/* 0,1,2,3 = 1,2,5.5,11 Mbps, 4 is auto */
+	int frag_threshold;	/* threshold for fragmentation of tx packets */
+	int rts_threshold;	/* threshold for RTS mechanism */
+	int short_retry_limit;
+
+	int scan_min_time;	/* scan min channel time */
+	int scan_max_time;	/* scan max channel time */
+	int scan_mode;		/* SCAN_TYPE_ACTIVE, SCAN_TYPE_PASSIVE */
+	int scan_need_any;	/* if set, need to scan for any ESSID */
+
+	u16 assoc_id;		/* current association ID, if associated */
+
+	u8 pm_mode;		/* power management mode */
+	u32 pm_period;		/* power management period in microseconds */
+
+	struct reg_domain const *domain;	/* reg domain description */
+
+	/* These fields contain HW config provided by the device (not all of
+	 * these fields are used by all board types) */
+	u8 mac_addr[ETH_ALEN];
+	u8 regulatory_domain;
+
+	struct at76_card_config card_config;
+
+	enum board_type board_type;
+	struct mib_fw_version fw_version;
+
+	unsigned int device_unplugged:1;
+	unsigned int netdev_registered:1;
+	struct set_mib_buffer mib_buf;	/* global buffer for set_mib calls */
+
+	int beacon_period;	/* period of mgmt beacons, Kus */
+
+	struct ieee80211_hw *hw;
+	int mac80211_registered;
+};
+
+#define AT76_SUPPORTED_FILTERS FIF_PROMISC_IN_BSS
+
+#define SCAN_POLL_INTERVAL	(HZ / 4)
+
+#define CMD_COMPLETION_TIMEOUT	(5 * HZ)
+
+#define DEF_RTS_THRESHOLD	1536
+#define DEF_FRAG_THRESHOLD	1536
+#define DEF_SHORT_RETRY_LIMIT	8
+#define DEF_CHANNEL		10
+#define DEF_SCAN_MIN_TIME	10
+#define DEF_SCAN_MAX_TIME	120
+
+/* the max padding size for tx in bytes (see calc_padding) */
+#define MAX_PADDING_SIZE	53
+
+#endif				/* _AT76_USB_H */