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>

1 files changed, 463 insertions, 0 deletions

diff --git a/drivers/net/wireless/at76c50x-usb.h b/drivers/net/wireless/at76c50x-usb.h
new file mode 100644
index 000000000000..1ec5ccffdbc0
--- /dev/null
+++ b/drivers/net/wireless/at76c50x-usb.h
@@ -0,0 +1,463 @@
+/*
+ * 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 */