/*** -*- linux-c -*- **********************************************************
Driver for Atmel at76c502 at76c504 and at76c506 wireless cards.
Copyright 2000-2001 ATMEL Corporation.
Copyright 2003-2004 Simon Kelley.
This code was developed from version 2.1.1 of the Atmel drivers,
released by Atmel corp. under the GPL in December 2002. It also
includes code from the Linux aironet drivers (C) Benjamin Reed,
and the Linux PCMCIA package, (C) David Hinds and the Linux wireless
extensions, (C) Jean Tourrilhes.
The firmware module for reading the MAC address of the card comes from
net.russotto.AtmelMACFW, written by Matthew T. Russotto and copyright
by him. net.russotto.AtmelMACFW is used under the GPL license version 2.
This file contains the module in binary form and, under the terms
of the GPL, in source form. The source is located at the end of the file.
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 software is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Atmel wireless lan drivers; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
For all queries about this code, please contact the current author,
Simon Kelley <simon@thekelleys.org.uk> and not Atmel Corporation.
Credit is due to HP UK and Cambridge Online Systems Ltd for supplying
hardware used during development of this driver.
******************************************************************************/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/timer.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/ioport.h>
#include <linux/fcntl.h>
#include <linux/delay.h>
#include <linux/wireless.h>
#include <net/iw_handler.h>
#include <linux/byteorder/generic.h>
#include <linux/crc32.h>
#include <linux/proc_fs.h>
#include <linux/device.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <net/ieee80211.h>
#include "atmel.h"
#define DRIVER_MAJOR 0
#define DRIVER_MINOR 98
MODULE_AUTHOR("Simon Kelley");
MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("Atmel at76c50x wireless cards");
/* The name of the firmware file to be loaded
over-rides any automatic selection */
static char *firmware = NULL;
module_param(firmware, charp, 0);
/* table of firmware file names */
static struct {
AtmelFWType fw_type;
const char *fw_file;
const char *fw_file_ext;
} fw_table[] = {
{ ATMEL_FW_TYPE_502, "atmel_at76c502", "bin" },
{ ATMEL_FW_TYPE_502D, "atmel_at76c502d", "bin" },
{ ATMEL_FW_TYPE_502E, "atmel_at76c502e", "bin" },
{ ATMEL_FW_TYPE_502_3COM, "atmel_at76c502_3com", "bin" },
{ ATMEL_FW_TYPE_504, "atmel_at76c504", "bin" },
{ ATMEL_FW_TYPE_504_2958, "atmel_at76c504_2958", "bin" },
{ ATMEL_FW_TYPE_504A_2958,"atmel_at76c504a_2958","bin" },
{ ATMEL_FW_TYPE_506, "atmel_at76c506", "bin" },
{ ATMEL_FW_TYPE_NONE, NULL, NULL }
};
#define MAX_SSID_LENGTH 32
#define MGMT_JIFFIES (256 * HZ / 100)
#define MAX_BSS_ENTRIES 64
/* registers */
#define GCR 0x00 // (SIR0) General Configuration Register
#define BSR 0x02 // (SIR1) Bank Switching Select Register
#define AR 0x04
#define DR 0x08
#define MR1 0x12 // Mirror Register 1
#define MR2 0x14 // Mirror Register 2
#define MR3 0x16 // Mirror Register 3
#define MR4 0x18 // Mirror Register 4
#define GPR1 0x0c
#define GPR2 0x0e
#define GPR3 0x10
//
// Constants for the GCR register.
//
#define GCR_REMAP 0x0400 // Remap internal SRAM to 0
#define GCR_SWRES 0x0080 // BIU reset (ARM and PAI are NOT reset)
#define GCR_CORES 0x0060 // Core Reset (ARM and PAI are reset)
#define GCR_ENINT 0x0002 // Enable Interrupts
#define GCR_ACKINT 0x0008 // Acknowledge Interrupts
#define BSS_SRAM 0x0200 // AMBA module selection --> SRAM
#define BSS_IRAM 0x0100 // AMBA module selection --> IRAM
//
// Constants for the MR registers.
//
#define MAC_INIT_COMPLETE 0x0001 // MAC init has been completed
#define MAC_BOOT_COMPLETE 0x0010 // MAC boot has been completed
#define MAC_INIT_OK 0x0002 // MAC boot has been completed
#define C80211_SUBTYPE_MGMT_ASS_REQUEST 0x00
#define C80211_SUBTYPE_MGMT_ASS_RESPONSE 0x10
#define C80211_SUBTYPE_MGMT_REASS_REQUEST 0x20
#define C80211_SUBTYPE_MGMT_REASS_RESPONSE 0x30
#define C80211_SUBTYPE_MGMT_ProbeRequest 0x40
#define C80211_SUBTYPE_MGMT_ProbeResponse 0x50
#define C80211_SUBTYPE_MGMT_BEACON 0x80
#define C80211_SUBTYPE_MGMT_ATIM 0x90
#define C80211_SUBTYPE_MGMT_DISASSOSIATION 0xA0
#define C80211_SUBTYPE_MGMT_Authentication 0xB0
#define C80211_SUBTYPE_MGMT_Deauthentication 0xC0
#define C80211_MGMT_AAN_OPENSYSTEM 0x0000
#define C80211_MGMT_AAN_SHAREDKEY 0x0001
#define C80211_MGMT_CAPABILITY_ESS 0x0001 // see 802.11 p.58
#define C80211_MGMT_CAPABILITY_IBSS 0x0002 // - " -
#define C80211_MGMT_CAPABILITY_CFPollable 0x0004 // - " -
#define C80211_MGMT_CAPABILITY_CFPollRequest 0x0008 // - " -
#define C80211_MGMT_CAPABILITY_Privacy 0x0010 // - " -
#define C80211_MGMT_SC_Success 0
#define C80211_MGMT_SC_Unspecified 1
#define C80211_MGMT_SC_SupportCapabilities 10
#define C80211_MGMT_SC_ReassDenied 11
#define C80211_MGMT_SC_AssDenied 12
#define C80211_MGMT_SC_AuthAlgNotSupported 13
#define C80211_MGMT_SC_AuthTransSeqNumError 14
#define C80211_MGMT_SC_AuthRejectChallenge 15
#define C80211_MGMT_SC_AuthRejectTimeout 16
#define C80211_MGMT_SC_AssDeniedHandleAP 17
#define C80211_MGMT_SC_AssDeniedBSSRate 18
#define C80211_MGMT_ElementID_SSID 0
#define C80211_MGMT_ElementID_SupportedRates 1
#define C80211_MGMT_ElementID_ChallengeText 16
#define C80211_MGMT_CAPABILITY_ShortPreamble 0x0020
#define MIB_MAX_DATA_BYTES 212
#define MIB_HEADER_SIZE 4 /* first four fields */
struct get_set_mib {
u8 type;
u8 size;
u8 index;
u8 reserved;
u8 data[MIB_MAX_DATA_BYTES];
};
struct rx_desc {
u32 Next;
u16 MsduPos;
u16 MsduSize;
u8 State;
u8 Status;
u8 Rate;
u8 Rssi;
u8 LinkQuality;
u8 PreambleType;
u16 Duration;
u32 RxTime;
};
#define RX_DESC_FLAG_VALID 0x80
#define RX_DESC_FLAG_CONSUMED 0x40
#define RX_DESC_FLAG_IDLE 0x00
#define RX_STATUS_SUCCESS 0x00
#define RX_DESC_MSDU_POS_OFFSET 4
#define RX_DESC_MSDU_SIZE_OFFSET 6
#define RX_DESC_FLAGS_OFFSET 8
#define RX_DESC_STATUS_OFFSET 9
#define RX_DESC_RSSI_OFFSET 11
#define RX_DESC_LINK_QUALITY_OFFSET 12
#define RX_DESC_PREAMBLE_TYPE_OFFSET 13
#define RX_DESC_DURATION_OFFSET 14
#define RX_DESC_RX_TIME_OFFSET 16
struct tx_desc {
u32 NextDescriptor;
u16 TxStartOfFrame;
u16 TxLength;
u8 TxState;
u8 TxStatus;
u8 RetryCount;
u8 TxRate;
u8 KeyIndex;
u8 ChiperType;
u8 ChipreLength;
u8 Reserved1;
u8 Reserved;
u8 PacketType;
u16 HostTxLength;
};
#define TX_DESC_NEXT_OFFSET 0
#define TX_DESC_POS_OFFSET 4
#define TX_DESC_SIZE_OFFSET 6
#define TX_DESC_FLAGS_OFFSET 8
#define TX_DESC_STATUS_OFFSET 9
#define TX_DESC_RETRY_OFFSET 10
#define TX_DESC_RATE_OFFSET 11
#define TX_DESC_KEY_INDEX_OFFSET 12
#define TX_DESC_CIPHER_TYPE_OFFSET 13
#define TX_DESC_CIPHER_LENGTH_OFFSET 14
#define TX_DESC_PACKET_TYPE_OFFSET 17
#define TX_DESC_HOST_LENGTH_OFFSET 18
///////////////////////////////////////////////////////
// Host-MAC interface
///////////////////////////////////////////////////////
#define TX_STATUS_SUCCESS 0x00
#define TX_FIRM_OWN 0x80
#define TX_DONE 0x40
#define TX_ERROR 0x01
#define TX_PACKET_TYPE_DATA 0x01
#define TX_PACKET_TYPE_MGMT 0x02
#define ISR_EMPTY 0x00 // no bits set in ISR
#define ISR_TxCOMPLETE 0x01 // packet transmitted
#define ISR_RxCOMPLETE 0x02 // packet received
#define ISR_RxFRAMELOST 0x04 // Rx Frame lost
#define ISR_FATAL_ERROR 0x08 // Fatal error
#define ISR_COMMAND_COMPLETE 0x10 // command completed
#define ISR_OUT_OF_RANGE 0x20 // command completed
#define ISR_IBSS_MERGE 0x40 // (4.1.2.30): IBSS merge
#define ISR_GENERIC_IRQ 0x80
#define Local_Mib_Type 0x01
#define Mac_Address_Mib_Type 0x02
#define Mac_Mib_Type 0x03
#define Statistics_Mib_Type 0x04
#define Mac_Mgmt_Mib_Type 0x05
#define Mac_Wep_Mib_Type 0x06
#define Phy_Mib_Type 0x07
#define Multi_Domain_MIB 0x08
#define MAC_MGMT_MIB_CUR_BSSID_POS 14
#define MAC_MIB_FRAG_THRESHOLD_POS 8
#define MAC_MIB_RTS_THRESHOLD_POS 10
#define MAC_MIB_SHORT_RETRY_POS 16
#define MAC_MIB_LONG_RETRY_POS 17
#define MAC_MIB_SHORT_RETRY_LIMIT_POS 16
#define MAC_MGMT_MIB_BEACON_PER_POS 0
#define MAC_MGMT_MIB_STATION_ID_POS 6
#define MAC_MGMT_MIB_CUR_PRIVACY_POS 11
#define MAC_MGMT_MIB_CUR_BSSID_POS 14
#define MAC_MGMT_MIB_PS_MODE_POS 53
#define MAC_MGMT_MIB_LISTEN_INTERVAL_POS 54
#define MAC_MGMT_MIB_MULTI_DOMAIN_IMPLEMENTED 56
#define MAC_MGMT_MIB_MULTI_DOMAIN_ENABLED 57
#define PHY_MIB_CHANNEL_POS 14
#define PHY_MIB_RATE_SET_POS 20
#define PHY_MIB_REG_DOMAIN_POS 26
#define LOCAL_MIB_AUTO_TX_RATE_POS 3
#define LOCAL_MIB_SSID_SIZE 5
#define LOCAL_MIB_TX_PROMISCUOUS_POS 6
#define LOCAL_MIB_TX_MGMT_RATE_POS 7
#define LOCAL_MIB_TX_CONTROL_RATE_POS 8
#define LOCAL_MIB_PREAMBLE_TYPE 9
#define MAC_ADDR_MIB_MAC_ADDR_POS 0
#define CMD_Set_MIB_Vars 0x01
#define CMD_Get_MIB_Vars 0x02
#define CMD_Scan 0x03
#define CMD_Join 0x04
#define CMD_Start 0x05
#define CMD_EnableRadio 0x06
#define CMD_DisableRadio 0x07
#define CMD_SiteSurvey 0x0B
#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_REJECTED_RADIO_OFF 0x09
#define CMD_STATUS_HOST_ERROR 0xFF
#define CMD_STATUS_BUSY 0xFE
#define CMD_BLOCK_COMMAND_OFFSET 0
#define CMD_BLOCK_STATUS_OFFSET 1
#define CMD_BLOCK_PARAMETERS_OFFSET 4
#define SCAN_OPTIONS_SITE_SURVEY 0x80
#define MGMT_FRAME_BODY_OFFSET 24
#define MAX_AUTHENTICATION_RETRIES 3
#define MAX_ASSOCIATION_RETRIES 3
#define AUTHENTICATION_RESPONSE_TIME_OUT 1000
#define MAX_WIRELESS_BODY 2316 /* mtu is 2312, CRC is 4 */
#define LOOP_RETRY_LIMIT 500000
#define ACTIVE_MODE 1
#define PS_MODE 2
#define MAX_ENCRYPTION_KEYS 4
#define MAX_ENCRYPTION_KEY_SIZE 40
///////////////////////////////////////////////////////////////////////////
// 802.11 related definitions
///////////////////////////////////////////////////////////////////////////
//
// Regulatory Domains
//
#define REG_DOMAIN_FCC 0x10 //Channels 1-11 USA
#define REG_DOMAIN_DOC 0x20 //Channel 1-11 Canada
#define REG_DOMAIN_ETSI 0x30 //Channel 1-13 Europe (ex Spain/France)
#define REG_DOMAIN_SPAIN 0x31 //Channel 10-11 Spain
#define REG_DOMAIN_FRANCE 0x32 //Channel 10-13 France
#define REG_DOMAIN_MKK 0x40 //Channel 14 Japan
#define REG_DOMAIN_MKK1 0x41 //Channel 1-14 Japan(MKK1)
#define REG_DOMAIN_ISRAEL 0x50 //Channel 3-9 ISRAEL
#define BSS_TYPE_AD_HOC 1
#define BSS_TYPE_INFRASTRUCTURE 2
#define SCAN_TYPE_ACTIVE 0
#define SCAN_TYPE_PASSIVE 1
#define LONG_PREAMBLE 0
#define SHORT_PREAMBLE 1
#define AUTO_PREAMBLE 2
#define DATA_FRAME_WS_HEADER_SIZE 30
/* promiscuous mode control */
#define PROM_MODE_OFF 0x0
#define PROM_MODE_UNKNOWN 0x1
#define PROM_MODE_CRC_FAILED 0x2
#define PROM_MODE_DUPLICATED 0x4
#define PROM_MODE_MGMT 0x8
#define PROM_MODE_CTRL 0x10
#define PROM_MODE_BAD_PROTOCOL 0x20
#define IFACE_INT_STATUS_OFFSET 0
#define IFACE_INT_MASK_OFFSET 1
#define IFACE_LOCKOUT_HOST_OFFSET 2
#define IFACE_LOCKOUT_MAC_OFFSET 3
#define IFACE_FUNC_CTRL_OFFSET 28
#define IFACE_MAC_STAT_OFFSET 30
#define IFACE_GENERIC_INT_TYPE_OFFSET 32
#define CIPHER_SUITE_NONE 0
#define CIPHER_SUITE_WEP_64 1
#define CIPHER_SUITE_TKIP 2
#define CIPHER_SUITE_AES 3
#define CIPHER_SUITE_CCX 4
#define CIPHER_SUITE_WEP_128 5
//
// IFACE MACROS & definitions
//
//
// FuncCtrl field:
//
#define FUNC_CTRL_TxENABLE 0x10
#define FUNC_CTRL_RxENABLE 0x20
#define FUNC_CTRL_INIT_COMPLETE 0x01
/* A stub firmware image which reads the MAC address from NVRAM on the card.
For copyright information and source see the end of this file. */
static u8 mac_reader[] = {
0x06,0x00,0x00,0xea,0x04,0x00,0x00,0xea,0x03,0x00,0x00,0xea,0x02,0x00,0x00,0xea,
0x01,0x00,0x00,0xea,0x00,0x00,0x00,0xea,0xff,0xff,0xff,0xea,0xfe,0xff,0xff,0xea,
0xd3,0x00,0xa0,0xe3,0x00,0xf0,0x21,0xe1,0x0e,0x04,0xa0,0xe3,0x00,0x10,0xa0,0xe3,
0x81,0x11,0xa0,0xe1,0x00,0x10,0x81,0xe3,0x00,0x10,0x80,0xe5,0x1c,0x10,0x90,0xe5,
0x10,0x10,0xc1,0xe3,0x1c,0x10,0x80,0xe5,0x01,0x10,0xa0,0xe3,0x08,0x10,0x80,0xe5,
0x02,0x03,0xa0,0xe3,0x00,0x10,0xa0,0xe3,0xb0,0x10,0xc0,0xe1,0xb4,0x10,0xc0,0xe1,
0xb8,0x10,0xc0,0xe1,0xbc,0x10,0xc0,0xe1,0x56,0xdc,0xa0,0xe3,0x21,0x00,0x00,0xeb,
0x0a,0x00,0xa0,0xe3,0x1a,0x00,0x00,0xeb,0x10,0x00,0x00,0xeb,0x07,0x00,0x00,0xeb,
0x02,0x03,0xa0,0xe3,0x02,0x14,0xa0,0xe3,0xb4,0x10,0xc0,0xe1,0x4c,0x10,0x9f,0xe5,
0xbc,0x10,0xc0,0xe1,0x10,0x10,0xa0,0xe3,0xb8,0x10,0xc0,0xe1,0xfe,0xff,0xff,0xea,
0x00,0x40,0x2d,0xe9,0x00,0x20,0xa0,0xe3,0x02,0x3c,0xa0,0xe3,0x00,0x10,0xa0,0xe3,
0x28,0x00,0x9f,0xe5,0x37,0x00,0x00,0xeb,0x00,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,
0x00,0x40,0x2d,0xe9,0x12,0x2e,0xa0,0xe3,0x06,0x30,0xa0,0xe3,0x00,0x10,0xa0,0xe3,
0x02,0x04,0xa0,0xe3,0x2f,0x00,0x00,0xeb,0x00,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,
0x00,0x02,0x00,0x02,0x80,0x01,0x90,0xe0,0x01,0x00,0x00,0x0a,0x01,0x00,0x50,0xe2,
0xfc,0xff,0xff,0xea,0x1e,0xff,0x2f,0xe1,0x80,0x10,0xa0,0xe3,0xf3,0x06,0xa0,0xe3,
0x00,0x10,0x80,0xe5,0x00,0x10,0xa0,0xe3,0x00,0x10,0x80,0xe5,0x01,0x10,0xa0,0xe3,
0x04,0x10,0x80,0xe5,0x00,0x10,0x80,0xe5,0x0e,0x34,0xa0,0xe3,0x1c,0x10,0x93,0xe5,
0x02,0x1a,0x81,0xe3,0x1c,0x10,0x83,0xe5,0x58,0x11,0x9f,0xe5,0x30,0x10,0x80,0xe5,
0x54,0x11,0x9f,0xe5,0x34,0x10,0x80,0xe5,0x38,0x10,0x80,0xe5,0x3c,0x10,0x80,0xe5,
0x10,0x10,0x90,0xe5,0x08,0x00,0x90,0xe5,0x1e,0xff,0x2f,0xe1,0xf3,0x16,0xa0,0xe3,
0x08,0x00,0x91,0xe5,0x05,0x00,0xa0,0xe3,0x0c,0x00,0x81,0xe5,0x10,0x00,0x91,0xe5,
0x02,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0xff,0x00,0xa0,0xe3,0x0c,0x00,0x81,0xe5,
0x10,0x00,0x91,0xe5,0x02,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0x08,0x00,0x91,0xe5,
0x10,0x00,0x91,0xe5,0x01,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0x08,0x00,0x91,0xe5,
0xff,0x00,0x00,0xe2,0x1e,0xff,0x2f,0xe1,0x30,0x40,0x2d,0xe9,0x00,0x50,0xa0,0xe1,
0x03,0x40,0xa0,0xe1,0xa2,0x02,0xa0,0xe1,0x08,0x00,0x00,0xe2,0x03,0x00,0x80,0xe2,
0xd8,0x10,0x9f,0xe5,0x00,0x00,0xc1,0xe5,0x01,0x20,0xc1,0xe5,0xe2,0xff,0xff,0xeb,
0x01,0x00,0x10,0xe3,0xfc,0xff,0xff,0x1a,0x14,0x00,0xa0,0xe3,0xc4,0xff,0xff,0xeb,
0x04,0x20,0xa0,0xe1,0x05,0x10,0xa0,0xe1,0x02,0x00,0xa0,0xe3,0x01,0x00,0x00,0xeb,
0x30,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,0x70,0x40,0x2d,0xe9,0xf3,0x46,0xa0,0xe3,
0x00,0x30,0xa0,0xe3,0x00,0x00,0x50,0xe3,0x08,0x00,0x00,0x9a,0x8c,0x50,0x9f,0xe5,
0x03,0x60,0xd5,0xe7,0x0c,0x60,0x84,0xe5,0x10,0x60,0x94,0xe5,0x02,0x00,0x16,0xe3,
0xfc,0xff,0xff,0x0a,0x01,0x30,0x83,0xe2,0x00,0x00,0x53,0xe1,0xf7,0xff,0xff,0x3a,
0xff,0x30,0xa0,0xe3,0x0c,0x30,0x84,0xe5,0x08,0x00,0x94,0xe5,0x10,0x00,0x94,0xe5,
0x01,0x00,0x10,0xe3,0xfc,0xff,0xff,0x0a,0x08,0x00,0x94,0xe5,0x00,0x00,0xa0,0xe3,
0x00,0x00,0x52,0xe3,0x0b,0x00,0x00,0x9a,0x10,0x50,0x94,0xe5,0x02,0x00,0x15,0xe3,
0xfc,0xff,0xff,0x0a,0x0c,0x30,0x84,0xe5,0x10,0x50,0x94,0xe5,0x01,0x00,0x15,0xe3,
0xfc,0xff,0xff,0x0a,0x08,0x50,0x94,0xe5,0x01,0x50,0xc1,0xe4,0x01,0x00,0x80,0xe2,
0x02,0x00,0x50,0xe1,0xf3,0xff,0xff,0x3a,0xc8,0x00,0xa0,0xe3,0x98,0xff,0xff,0xeb,
0x70,0x40,0xbd,0xe8,0x1e,0xff,0x2f,0xe1,0x01,0x0c,0x00,0x02,0x01,0x02,0x00,0x02,
0x00,0x01,0x00,0x02
};
struct atmel_private {
void *card; /* Bus dependent stucture varies for PCcard */
int (*present_callback)(void *); /* And callback which uses it */
char firmware_id[32];
AtmelFWType firmware_type;
u8 *firmware;
int firmware_length;
struct timer_list management_timer;
struct net_device *dev;
struct device *sys_dev;
struct iw_statistics wstats;
struct net_device_stats stats; // device stats
spinlock_t irqlock, timerlock; // spinlocks
enum { BUS_TYPE_PCCARD, BUS_TYPE_PCI } bus_type;
enum {
CARD_TYPE_PARALLEL_FLASH,
CARD_TYPE_SPI_FLASH,
CARD_TYPE_EEPROM
} card_type;
int do_rx_crc; /* If we need to CRC incoming packets */
int probe_crc; /* set if we don't yet know */
int crc_ok_cnt, crc_ko_cnt; /* counters for probing */
u16 rx_desc_head;
u16 tx_desc_free, tx_desc_head, tx_desc_tail, tx_desc_previous;
u16 tx_free_mem, tx_buff_head, tx_buff_tail;
u16 frag_seq, frag_len, frag_no;
u8 frag_source[6];
u8 wep_is_on, default_key, exclude_unencrypted, encryption_level;
u8 group_cipher_suite, pairwise_cipher_suite;
u8 wep_keys[MAX_ENCRYPTION_KEYS][MAX_ENCRYPTION_KEY_SIZE];
int wep_key_len[MAX_ENCRYPTION_KEYS];
int use_wpa, radio_on_broken; /* firmware dependent stuff. */
u16 host_info_base;
struct host_info_struct {
/* NB this is matched to the hardware, don't change. */
u8 volatile int_status;
u8 volatile int_mask;
u8 volatile lockout_host;
u8 volatile lockout_mac;
u16 tx_buff_pos;
u16 tx_buff_size;
u16 tx_desc_pos;
u16 tx_desc_count;
u16 rx_buff_pos;
u16 rx_buff_size;
u16 rx_desc_pos;
u16 rx_desc_count;
u16 build_version;
u16 command_pos;
u16 major_version;
u16 minor_version;
u16 func_ctrl;
u16 mac_status;
u16 generic_IRQ_type;
u8 reserved[2];
} host_info;
enum {
STATION_STATE_SCANNING,
STATION_STATE_JOINNING,
STATION_STATE_AUTHENTICATING,
STATION_STATE_ASSOCIATING,
STATION_STATE_READY,
STATION_STATE_REASSOCIATING,
STATION_STATE_DOWN,
STATION_STATE_MGMT_ERROR
} station_state;
int operating_mode, power_mode;
time_t last_qual;
int beacons_this_sec;
int channel;
int reg_domain, config_reg_domain;
int tx_rate;
int auto_tx_rate;
int rts_threshold;
int frag_threshold;
int long_retry, short_retry;
int preamble;
int default_beacon_period, beacon_period, listen_interval;
int CurrentAuthentTransactionSeqNum, ExpectedAuthentTransactionSeqNum;
int AuthenticationRequestRetryCnt, AssociationRequestRetryCnt, ReAssociationRequestRetryCnt;
enum {
SITE_SURVEY_IDLE,
SITE_SURVEY_IN_PROGRESS,
SITE_SURVEY_COMPLETED
} site_survey_state;
time_t last_survey;
int station_was_associated, station_is_associated;
int fast_scan;
struct bss_info {
int channel;
int SSIDsize;
int RSSI;
int UsingWEP;
int preamble;
int beacon_period;
int BSStype;
u8 BSSID[6];
u8 SSID[MAX_SSID_LENGTH];
} BSSinfo[MAX_BSS_ENTRIES];
int BSS_list_entries, current_BSS;
int connect_to_any_BSS;
int SSID_size, new_SSID_size;
u8 CurrentBSSID[6], BSSID[6];
u8 SSID[MAX_SSID_LENGTH], new_SSID[MAX_SSID_LENGTH];
u64 last_beacon_timestamp;
u8 rx_buf[MAX_WIRELESS_BODY];
};
static u8 atmel_basic_rates[4] = {0x82,0x84,0x0b,0x16};
static const struct {
int reg_domain;
int min, max;
char *name;
} channel_table[] = { { REG_DOMAIN_FCC, 1, 11, "USA" },
{ REG_DOMAIN_DOC, 1, 11, "Canada" },
{ REG_DOMAIN_ETSI, 1, 13, "Europe" },
{ REG_DOMAIN_SPAIN, 10, 11, "Spain" },
{ REG_DOMAIN_FRANCE, 10, 13, "France" },
{ REG_DOMAIN_MKK, 14, 14, "MKK" },
{ REG_DOMAIN_MKK1, 1, 14, "MKK1" },
{ REG_DOMAIN_ISRAEL, 3, 9, "Israel"} };
static void build_wpa_mib(struct atmel_private *priv);
static int atmel_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static void atmel_copy_to_card(struct net_device *dev, u16 dest, unsigned char *src, u16 len);
static void atmel_copy_to_host(struct net_device *dev, unsigned char *dest, u16 src, u16 len);
static void atmel_set_gcr(struct net_device *dev, u16 mask);
static void atmel_clear_gcr(struct net_device *dev, u16 mask);
static int atmel_lock_mac(struct atmel_private *priv);
static void atmel_wmem32(struct atmel_private *priv, u16 pos, u32 data);
static void atmel_command_irq(struct atmel_private *priv);
static int atmel_validate_channel(struct atmel_private *priv, int channel);
static void atmel_management_frame(struct atmel_private *priv, struct ieee80211_hdr_4addr *header,
u16 frame_len, u8 rssi);
static void atmel_management_timer(u_long a);
static void atmel_send_command(struct atmel_private *priv, int command, void *cmd, int cmd_size);
static int atmel_send_command_wait(struct atmel_private *priv, int command, void *cmd, int cmd_size);
static void atmel_transmit_management_frame(struct atmel_private *priv, struct ieee80211_hdr_4addr *header,
u8 *body, int body_len);
static u8 atmel_get_mib8(struct atmel_private *priv, u8 type, u8 index);
static void atmel_set_mib8(struct atmel_private *priv, u8 type, u8 index, u8 data);
static void atmel_set_mib16(struct atmel_private *priv, u8 type, u8 index, u16 data);
static void atmel_set_mib(struct atmel_private *priv, u8 type, u8 index, u8 *data, int data_len);
static void atmel_get_mib(struct atmel_private *priv, u8 type, u8 index, u8 *data, int data_len);
static void atmel_scan(struct atmel_private *priv, int specific_ssid);
static void atmel_join_bss(struct atmel_private *priv, int bss_index);
static void atmel_smooth_qual(struct atmel_private *priv);
static void atmel_writeAR(struct net_device *dev, u16 data);
static int probe_atmel_card(struct net_device *dev);
static int reset_atmel_card(struct net_device *dev );
static void atmel_enter_state(struct atmel_private *priv, int new_state);
int atmel_open (struct net_device *dev);
static inline u16 atmel_hi(struct atmel_private *priv, u16 offset)
{
return priv->host_info_base + offset;
}
static inline u16 atmel_co(struct atmel_private *priv, u16 offset)
{
return priv->host_info.command_pos + offset;
}
static inline u16 atmel_rx(struct atmel_private *priv, u16 offset, u16 desc)
{
return priv->host_info.rx_desc_pos + (sizeof(struct rx_desc) * desc) + offset;
}
static inline u16 atmel_tx(struct atmel_private *priv, u16 offset, u16 desc)
{
return priv->host_info.tx_desc_pos + (sizeof(struct tx_desc) * desc) + offset;
}
static inline u8 atmel_read8(struct net_device *dev, u16 offset)
{
return inb(dev->base_addr + offset);
}
static inline void atmel_write8(struct net_device *dev, u16 offset, u8 data)
{
outb(data, dev->base_addr + offset);
}
static inline u16 atmel_read16(struct net_device *dev, u16 offset)
{
return inw(dev->base_addr + offset);
}
static inline void atmel_write16(struct net_device *dev, u16 offset, u16 data)
{
outw(data, dev->base_addr + offset);
}
static inline u8 atmel_rmem8(struct atmel_private *priv, u16 pos)
{
atmel_writeAR(priv->dev, pos);
return atmel_read8(priv->dev, DR);
}
static inline void atmel_wmem8(struct atmel_private *priv, u16 pos, u16 data)
{
atmel_writeAR(priv->dev, pos);
atmel_write8(priv->dev, DR, data);
}
static inline u16 atmel_rmem16(struct atmel_private *priv, u16 pos)
{
atmel_writeAR(priv->dev, pos);
return atmel_read16(priv->dev, DR);
}
static inline void atmel_wmem16(struct atmel_private *priv, u16 pos, u16 data)
{
atmel_writeAR(priv->dev, pos);
atmel_write16(priv->dev, DR, data);
}
static const struct iw_handler_def atmel_handler_def;
static void tx_done_irq(struct atmel_private *priv)
{
int i;
for (i = 0;
atmel_rmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_head)) == TX_DONE &&
i < priv->host_info.tx_desc_count;
i++) {
u8 status = atmel_rmem8(priv, atmel_tx(priv, TX_DESC_STATUS_OFFSET, priv->tx_desc_head));
u16 msdu_size = atmel_rmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, priv->tx_desc_head));
u8 type = atmel_rmem8(priv, atmel_tx(priv, TX_DESC_PACKET_TYPE_OFFSET, priv->tx_desc_head));
atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_head), 0);
priv->tx_free_mem += msdu_size;
priv->tx_desc_free++;
if (priv->tx_buff_head + msdu_size > (priv->host_info.tx_buff_pos + priv->host_info.tx_buff_size))
priv->tx_buff_head = 0;
else
priv->tx_buff_head += msdu_size;
if (priv->tx_desc_head < (priv->host_info.tx_desc_count - 1))
priv->tx_desc_head++ ;
else
priv->tx_desc_head = 0;
if (type == TX_PACKET_TYPE_DATA) {
if (status == TX_STATUS_SUCCESS)
priv->stats.tx_packets++;
else
priv->stats.tx_errors++;
netif_wake_queue(priv->dev);
}
}
}
static u16 find_tx_buff(struct atmel_private *priv, u16 len)
{
u16 bottom_free = priv->host_info.tx_buff_size - priv->tx_buff_tail;
if (priv->tx_desc_free == 3 || priv->tx_free_mem < len)
return 0;
if (bottom_free >= len)
return priv->host_info.tx_buff_pos + priv->tx_buff_tail;
if (priv->tx_free_mem - bottom_free >= len) {
priv->tx_buff_tail = 0;
return priv->host_info.tx_buff_pos;
}
return 0;
}
static void tx_update_descriptor(struct atmel_private *priv, int is_bcast, u16 len, u16 buff, u8 type)
{
atmel_wmem16(priv, atmel_tx(priv, TX_DESC_POS_OFFSET, priv->tx_desc_tail), buff);
atmel_wmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, priv->tx_desc_tail), len);
if (!priv->use_wpa)
atmel_wmem16(priv, atmel_tx(priv, TX_DESC_HOST_LENGTH_OFFSET, priv->tx_desc_tail), len);
atmel_wmem8(priv, atmel_tx(priv, TX_DESC_PACKET_TYPE_OFFSET, priv->tx_desc_tail), type);
atmel_wmem8(priv, atmel_tx(priv, TX_DESC_RATE_OFFSET, priv->tx_desc_tail), priv->tx_rate);
atmel_wmem8(priv, atmel_tx(priv, TX_DESC_RETRY_OFFSET, priv->tx_desc_tail), 0);
if (priv->use_wpa) {
int cipher_type, cipher_length;
if (is_bcast) {
cipher_type = priv->group_cipher_suite;
if (cipher_type == CIPHER_SUITE_WEP_64 ||
cipher_type == CIPHER_SUITE_WEP_128 )
cipher_length = 8;
else if (cipher_type == CIPHER_SUITE_TKIP)
cipher_length = 12;
else if (priv->pairwise_cipher_suite == CIPHER_SUITE_WEP_64 ||
priv->pairwise_cipher_suite == CIPHER_SUITE_WEP_128) {
cipher_type = priv->pairwise_cipher_suite;
cipher_length = 8;
} else {
cipher_type = CIPHER_SUITE_NONE;
cipher_length = 0;
}
} else {
cipher_type = priv->pairwise_cipher_suite;
if (cipher_type == CIPHER_SUITE_WEP_64 ||
cipher_type == CIPHER_SUITE_WEP_128 )
cipher_length = 8;
else if (cipher_type == CIPHER_SUITE_TKIP)
cipher_length = 12;
else if (priv->group_cipher_suite == CIPHER_SUITE_WEP_64 ||
priv->group_cipher_suite == CIPHER_SUITE_WEP_128) {
cipher_type = priv->group_cipher_suite;
cipher_length = 8;
} else {
cipher_type = CIPHER_SUITE_NONE;
cipher_length = 0;
}
}
atmel_wmem8(priv, atmel_tx(priv, TX_DESC_CIPHER_TYPE_OFFSET, priv->tx_desc_tail),
cipher_type);
atmel_wmem8(priv, atmel_tx(priv, TX_DESC_CIPHER_LENGTH_OFFSET, priv->tx_desc_tail),
cipher_length);
}
atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, priv->tx_desc_tail), 0x80000000L);
atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_tail), TX_FIRM_OWN);
if (priv->tx_desc_previous != priv->tx_desc_tail)
atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, priv->tx_desc_previous), 0);
priv->tx_desc_previous = priv->tx_desc_tail;
if (priv->tx_desc_tail < (priv->host_info.tx_desc_count -1 ))
priv->tx_desc_tail++;
else
priv->tx_desc_tail = 0;
priv->tx_desc_free--;
priv->tx_free_mem -= len;
}
static int start_tx (struct sk_buff *skb, struct net_device *dev)
{
struct atmel_private *priv = netdev_priv(dev);
struct ieee80211_hdr_4addr header;
unsigned long flags;
u16 buff, frame_ctl, len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
u8 SNAP_RFC1024[6] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
if (priv->card && priv->present_callback &&
!(*priv->present_callback)(priv->card)) {
priv->stats.tx_errors++;
dev_kfree_skb(skb);
return 0;
}
if (priv->station_state != STATION_STATE_READY) {
priv->stats.tx_errors++;
dev_kfree_skb(skb);
return 0;
}
/* first ensure the timer func cannot run */
spin_lock_bh(&priv->timerlock);
/* then stop the hardware ISR */
spin_lock_irqsave(&priv->irqlock, flags);
/* nb doing the above in the opposite order will deadlock */
/* The Wireless Header is 30 bytes. In the Ethernet packet we "cut" the
12 first bytes (containing DA/SA) and put them in the appropriate fields of
the Wireless Header. Thus the packet length is then the initial + 18 (+30-12) */
if (!(buff = find_tx_buff(priv, len + 18))) {
priv->stats.tx_dropped++;
spin_unlock_irqrestore(&priv->irqlock, flags);
spin_unlock_bh(&priv->timerlock);
netif_stop_queue(dev);
return 1;
}
frame_ctl = IEEE80211_FTYPE_DATA;
header.duration_id = 0;
header.seq_ctl = 0;
if (priv->wep_is_on)
frame_ctl |= IEEE80211_FCTL_PROTECTED;
if (priv->operating_mode == IW_MODE_ADHOC) {
memcpy(&header.addr1, skb->data, 6);
memcpy(&header.addr2, dev->dev_addr, 6);
memcpy(&header.addr3, priv->BSSID, 6);
} else {
frame_ctl |= IEEE80211_FCTL_TODS;
memcpy(&header.addr1, priv->CurrentBSSID, 6);
memcpy(&header.addr2, dev->dev_addr, 6);
memcpy(&header.addr3, skb->data, 6);
}
if (priv->use_wpa)
memcpy(&header.addr4, SNAP_RFC1024, 6);
header.frame_ctl = cpu_to_le16(frame_ctl);
/* Copy the wireless header into the card */
atmel_copy_to_card(dev, buff, (unsigned char *)&header, DATA_FRAME_WS_HEADER_SIZE);
/* Copy the packet sans its 802.3 header addresses which have been replaced */
atmel_copy_to_card(dev, buff + DATA_FRAME_WS_HEADER_SIZE, skb->data + 12, len - 12);
priv->tx_buff_tail += len - 12 + DATA_FRAME_WS_HEADER_SIZE;
/* low bit of first byte of destination tells us if broadcast */
tx_update_descriptor(priv, *(skb->data) & 0x01, len + 18, buff, TX_PACKET_TYPE_DATA);
dev->trans_start = jiffies;
priv->stats.tx_bytes += len;
spin_unlock_irqrestore(&priv->irqlock, flags);
spin_unlock_bh(&priv->timerlock);
dev_kfree_skb(skb);
return 0;
}
static void atmel_transmit_management_frame(struct atmel_private *priv,
struct ieee80211_hdr_4addr *header,
u8 *body, int body_len)
{
u16 buff;
int len = MGMT_FRAME_BODY_OFFSET + body_len;
if (!(buff = find_tx_buff(priv, len)))
return;
atmel_copy_to_card(priv->dev, buff, (u8 *)header, MGMT_FRAME_BODY_OFFSET);
atmel_copy_to_card(priv->dev, buff + MGMT_FRAME_BODY_OFFSET, body, body_len);
priv->tx_buff_tail += len;
tx_update_descriptor(priv, header->addr1[0] & 0x01, len, buff, TX_PACKET_TYPE_MGMT);
}
static void fast_rx_path(struct atmel_private *priv, struct ieee80211_hdr_4addr *header,
u16 msdu_size, u16 rx_packet_loc, u32 crc)
{
/* fast path: unfragmented packet copy directly into skbuf */
u8 mac4[6];
struct sk_buff *skb;
unsigned char *skbp;
/* get the final, mac 4 header field, this tells us encapsulation */
atmel_copy_to_host(priv->dev, mac4, rx_packet_loc + 24, 6);
msdu_size -= 6;
if (priv->do_rx_crc) {
crc = crc32_le(crc, mac4, 6);
msdu_size -= 4;
}
if (!(skb = dev_alloc_skb(msdu_size + 14))) {
priv->stats.rx_dropped++;
return;
}
skb_reserve(skb, 2);
skbp = skb_put(skb, msdu_size + 12);
atmel_copy_to_host(priv->dev, skbp + 12, rx_packet_loc + 30, msdu_size);
if (priv->do_rx_crc) {
u32 netcrc;
crc = crc32_le(crc, skbp + 12, msdu_size);
atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + 30 + msdu_size, 4);
if ((crc ^ 0xffffffff) != netcrc) {
priv->stats.rx_crc_errors++;
dev_kfree_skb(skb);
return;
}
}
memcpy(skbp, header->addr1, 6); /* destination address */
if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
memcpy(&skbp[6], header->addr3, 6);
else
memcpy(&skbp[6], header->addr2, 6); /* source address */
priv->dev->last_rx=jiffies;
skb->dev = priv->dev;
skb->protocol = eth_type_trans(skb, priv->dev);
skb->ip_summed = CHECKSUM_NONE;
netif_rx(skb);
priv->stats.rx_bytes += 12 + msdu_size;
priv->stats.rx_packets++;
}
/* Test to see if the packet in card memory at packet_loc has a valid CRC
It doesn't matter that this is slow: it is only used to proble the first few packets. */
static int probe_crc(struct atmel_private *priv, u16 packet_loc, u16 msdu_size)
{
int i = msdu_size - 4;
u32 netcrc, crc = 0xffffffff;
if (msdu_size < 4)
return 0;
atmel_copy_to_host(priv->dev, (void *)&netcrc, packet_loc + i, 4);
atmel_writeAR(priv->dev, packet_loc);
while (i--) {
u8 octet = atmel_read8(priv->dev, DR);
crc = crc32_le(crc, &octet, 1);
}
return (crc ^ 0xffffffff) == netcrc;
}
static void frag_rx_path(struct atmel_private *priv, struct ieee80211_hdr_4addr *header,
u16 msdu_size, u16 rx_packet_loc, u32 crc, u16 seq_no, u8 frag_no, int more_frags)
{
u8 mac4[6];
u8 source[6];
struct sk_buff *skb;
if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
memcpy(source, header->addr3, 6);
else
memcpy(source, header->addr2, 6);
rx_packet_loc += 24; /* skip header */
if (priv->do_rx_crc)
msdu_size -= 4;
if (frag_no == 0) { /* first fragment */
atmel_copy_to_host(priv->dev, mac4, rx_packet_loc, 6);
msdu_size -= 6;
rx_packet_loc += 6;
if (priv->do_rx_crc)
crc = crc32_le(crc, mac4, 6);
priv->frag_seq = seq_no;
priv->frag_no = 1;
priv->frag_len = msdu_size;
memcpy(priv->frag_source, source, 6);
memcpy(&priv->rx_buf[6], source, 6);
memcpy(priv->rx_buf, header->addr1, 6);
atmel_copy_to_host(priv->dev, &priv->rx_buf[12], rx_packet_loc, msdu_size);
if (priv->do_rx_crc) {
u32 netcrc;
crc = crc32_le(crc, &priv->rx_buf[12], msdu_size);
atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + msdu_size, 4);
if ((crc ^ 0xffffffff) != netcrc) {
priv->stats.rx_crc_errors++;
memset(priv->frag_source, 0xff, 6);
}
}
} else if (priv->frag_no == frag_no &&
priv->frag_seq == seq_no &&
memcmp(priv->frag_source, source, 6) == 0) {
atmel_copy_to_host(priv->dev, &priv->rx_buf[12 + priv->frag_len],
rx_packet_loc, msdu_size);
if (priv->do_rx_crc) {
u32 netcrc;
crc = crc32_le(crc,
&priv->rx_buf[12 + priv->frag_len],
msdu_size);
atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + msdu_size, 4);
if ((crc ^ 0xffffffff) != netcrc) {
priv->stats.rx_crc_errors++;
memset(priv->frag_source, 0xff, 6);
more_frags = 1; /* don't send broken assembly */
}
}
priv->frag_len += msdu_size;
priv->frag_no++;
if (!more_frags) { /* last one */
memset(priv->frag_source, 0xff, 6);
if (!(skb = dev_alloc_skb(priv->frag_len + 14))) {
priv->stats.rx_dropped++;
} else {
skb_reserve(skb, 2);
memcpy(skb_put(skb, priv->frag_len + 12),
priv->rx_buf,
priv->frag_len + 12);
priv->dev->last_rx = jiffies;
skb->dev = priv->dev;
skb->protocol = eth_type_trans(skb, priv->dev);
skb->ip_summed = CHECKSUM_NONE;
netif_rx(skb);
priv->stats.rx_bytes += priv->frag_len + 12;
priv->stats.rx_packets++;
}
}
} else
priv->wstats.discard.fragment++;
}
static void rx_done_irq(struct atmel_private *priv)
{
int i;
struct ieee80211_hdr_4addr header;
for (i = 0;
atmel_rmem8(priv, atmel_rx(priv, RX_DESC_FLAGS_OFFSET, priv->rx_desc_head)) == RX_DESC_FLAG_VALID &&
i < priv->host_info.rx_desc_count;
i++) {
u16 msdu_size, rx_packet_loc, frame_ctl, seq_control;
u8 status = atmel_rmem8(priv, atmel_rx(priv, RX_DESC_STATUS_OFFSET, priv->rx_desc_head));
u32 crc = 0xffffffff;
if (status != RX_STATUS_SUCCESS) {
if (status == 0xc1) /* determined by experiment */
priv->wstats.discard.nwid++;
else
priv->stats.rx_errors++;
goto next;
}
msdu_size = atmel_rmem16(priv, atmel_rx(priv, RX_DESC_MSDU_SIZE_OFFSET, priv->rx_desc_head));
rx_packet_loc = atmel_rmem16(priv, atmel_rx(priv, RX_DESC_MSDU_POS_OFFSET, priv->rx_desc_head));
if (msdu_size < 30) {
priv->stats.rx_errors++;
goto next;
}
/* Get header as far as end of seq_ctl */
atmel_copy_to_host(priv->dev, (char *)&header, rx_packet_loc, 24);
frame_ctl = le16_to_cpu(header.frame_ctl);
seq_control = le16_to_cpu(header.seq_ctl);
/* probe for CRC use here if needed once five packets have arrived with
the same crc status, we assume we know what's happening and stop probing */
if (priv->probe_crc) {
if (!priv->wep_is_on || !(frame_ctl & IEEE80211_FCTL_PROTECTED)) {
priv->do_rx_crc = probe_crc(priv, rx_packet_loc, msdu_size);
} else {
priv->do_rx_crc = probe_crc(priv, rx_packet_loc + 24, msdu_size - 24);
}
if (priv->do_rx_crc) {
if (priv->crc_ok_cnt++ > 5)
priv->probe_crc = 0;
} else {
if (priv->crc_ko_cnt++ > 5)
priv->probe_crc = 0;
}
}
/* don't CRC header when WEP in use */
if (priv->do_rx_crc && (!priv->wep_is_on || !(frame_ctl & IEEE80211_FCTL_PROTECTED))) {
crc = crc32_le(0xffffffff, (unsigned char *)&header, 24);
}
msdu_size -= 24; /* header */
if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) {
int more_fragments = frame_ctl & IEEE80211_FCTL_MOREFRAGS;
u8 packet_fragment_no = seq_control & IEEE80211_SCTL_FRAG;
u16 packet_sequence_no = (seq_control & IEEE80211_SCTL_SEQ) >> 4;
if (!more_fragments && packet_fragment_no == 0 ) {
fast_rx_path(priv, &header, msdu_size, rx_packet_loc, crc);
} else {
frag_rx_path(priv, &header, msdu_size, rx_packet_loc, crc,
packet_sequence_no, packet_fragment_no, more_fragments);
}
}
if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
/* copy rest of packet into buffer */
atmel_copy_to_host(priv->dev, (unsigned char *)&priv->rx_buf, rx_packet_loc + 24, msdu_size);
/* we use the same buffer for frag reassembly and control packets */
memset(priv->frag_source, 0xff, 6);
if (priv->do_rx_crc) {
/* last 4 octets is crc */
msdu_size -= 4;
crc = crc32_le(crc, (unsigned char *)&priv->rx_buf, msdu_size);
if ((crc ^ 0xffffffff) != (*((u32 *)&priv->rx_buf[msdu_size]))) {
priv->stats.rx_crc_errors++;
goto next;
}
}
atmel_management_frame(priv, &header, msdu_size,
atmel_rmem8(priv, atmel_rx(priv, RX_DESC_RSSI_OFFSET, priv->rx_desc_head)));
}
next:
/* release descriptor */
atmel_wmem8(priv, atmel_rx(priv, RX_DESC_FLAGS_OFFSET, priv->rx_desc_head), RX_DESC_FLAG_CONSUMED);
if (priv->rx_desc_head < (priv->host_info.rx_desc_count - 1))
priv->rx_desc_head++;
else
priv->rx_desc_head = 0;
}
}
static irqreturn_t service_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *) dev_id;
struct atmel_private *priv = netdev_priv(dev);
u8 isr;
int i = -1;
static u8 irq_order[] = {
ISR_OUT_OF_RANGE,
ISR_RxCOMPLETE,
ISR_TxCOMPLETE,
ISR_RxFRAMELOST,
ISR_FATAL_ERROR,
ISR_COMMAND_COMPLETE,
ISR_IBSS_MERGE,
ISR_GENERIC_IRQ
};
if (priv->card && priv->present_callback &&
!(*priv->present_callback)(priv->card))
return IRQ_HANDLED;
/* In this state upper-level code assumes it can mess with
the card unhampered by interrupts which may change register state.
Note that even though the card shouldn't generate interrupts
the inturrupt line may be shared. This allows card setup
to go on without disabling interrupts for a long time. */
if (priv->station_state == STATION_STATE_DOWN)
return IRQ_NONE;
atmel_clear_gcr(dev, GCR_ENINT); /* disable interrupts */
while (1) {
if (!atmel_lock_mac(priv)) {
/* failed to contact card */
printk(KERN_ALERT "%s: failed to contact MAC.\n", dev->name);
return IRQ_HANDLED;
}
isr = atmel_rmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET));
atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);
if (!isr) {
atmel_set_gcr(dev, GCR_ENINT); /* enable interrupts */
return i == -1 ? IRQ_NONE : IRQ_HANDLED;
}
atmel_set_gcr(dev, GCR_ACKINT); /* acknowledge interrupt */
for (i = 0; i < sizeof(irq_order)/sizeof(u8); i++)
if (isr & irq_order[i])
break;
if (!atmel_lock_mac(priv)) {
/* failed to contact card */
printk(KERN_ALERT "%s: failed to contact MAC.\n", dev->name);
return IRQ_HANDLED;
}
isr = atmel_rmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET));
isr ^= irq_order[i];
atmel_wmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET), isr);
atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);
switch (irq_order[i]) {
case ISR_OUT_OF_RANGE:
if (priv->operating_mode == IW_MODE_INFRA &&
priv->station_state == STATION_STATE_READY) {
priv->station_is_associated = 0;
atmel_scan(priv, 1);
}
break;
case ISR_RxFRAMELOST:
priv->wstats.discard.misc++;
/* fall through */
case ISR_RxCOMPLETE:
rx_done_irq(priv);
break;
case ISR_TxCOMPLETE:
tx_done_irq(priv);
break;
case ISR_FATAL_ERROR:
printk(KERN_ALERT "%s: *** FATAL error interrupt ***\n", dev->name);
atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
break;
case ISR_COMMAND_COMPLETE:
atmel_command_irq(priv);
break;
case ISR_IBSS_MERGE:
atmel_get_mib(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_BSSID_POS,
priv->CurrentBSSID, 6);
/* The WPA stuff cares about the current AP address */
if (priv->use_wpa)
build_wpa_mib(priv);
break;
case ISR_GENERIC_IRQ:
printk(KERN_INFO "%s: Generic_irq received.\n", dev->name);
break;
}
}
}
static struct net_device_stats *atmel_get_stats (struct net_device *dev)
{
struct atmel_private *priv = netdev_priv(dev);
return &priv->stats;
}
static struct iw_statistics *atmel_get_wireless_stats (struct net_device *dev)
{
struct atmel_private *priv = netdev_priv(dev);
/* update the link quality here in case we are seeing no beacons
at all to drive the process */
atmel_smooth_qual(priv);
priv->wstats.status = priv->station_state;
if (priv->operating_mode == IW_MODE_INFRA) {
if (priv->station_state != STATION_STATE_READY) {
priv->wstats.qual.qual = 0;
priv->wstats.qual.level = 0;
priv->wstats.qual.updated = (IW_QUAL_QUAL_INVALID
| IW_QUAL_LEVEL_INVALID);
}
priv->wstats.qual.noise = 0;
priv->wstats.qual.updated |= IW_QUAL_NOISE_INVALID;
} else {
/* Quality levels cannot be determined in ad-hoc mode,
because we can 'hear' more that one remote station. */
priv->wstats.qual.qual = 0;
priv->wstats.qual.level = 0;
priv->wstats.qual.noise = 0;
priv->wstats.qual.updated = IW_QUAL_QUAL_INVALID
| IW_QUAL_LEVEL_INVALID
| IW_QUAL_NOISE_INVALID;
priv->wstats.miss.beacon = 0;
}
return (&priv->wstats);
}
static int atmel_change_mtu(struct net_device *dev, int new_mtu)
{
if ((new_mtu < 68) || (new_mtu > 2312))
return -EINVAL;
dev->mtu = new_mtu;
return 0;
}
static int atmel_set_mac_address(struct net_device *dev, void *p)
{
struct sockaddr *addr = p;
memcpy (dev->dev_addr, addr->sa_data, dev->addr_len);
return atmel_open(dev);
}
EXPORT_SYMBOL(atmel_open);
int atmel_open (struct net_device *dev)
{
struct atmel_private *priv = netdev_priv(dev);
int i, channel;
/* any scheduled timer is no longer needed and might screw things up.. */
del_timer_sync(&priv->management_timer);
/* Interrupts will not touch the card once in this state... */
priv->station_state = STATION_STATE_DOWN;
if (priv->new_SSID_size) {
memcpy(priv->SSID, priv->new_SSID, priv->new_SSID_size);
priv->SSID_size = priv->new_SSID_size;
priv->new_SSID_size = 0;
}
priv->BSS_list_entries = 0;
priv->AuthenticationRequestRetryCnt = 0;
priv->AssociationRequestRetryCnt = 0;
priv->ReAssociationRequestRetryCnt = 0;
priv->CurrentAuthentTransactionSeqNum = 0x0001;
priv->ExpectedAuthentTransactionSeqNum = 0x0002;
priv->site_survey_state = SITE_SURVEY_IDLE;
priv->station_is_associated = 0;
if (!reset_atmel_card(dev))
return -EAGAIN;
if (priv->config_reg_domain) {
priv->reg_domain = priv->config_reg_domain;
atmel_set_mib8(priv, Phy_Mib_Type, PHY_MIB_REG_DOMAIN_POS, priv->reg_domain);
} else {
priv->reg_domain = atmel_get_mib8(priv, Phy_Mib_Type, PHY_MIB_REG_DOMAIN_POS);
for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++)
if (priv->reg_domain == channel_table[i].reg_domain)
break;
if (i == sizeof(channel_table)/sizeof(channel_table[0])) {
priv->reg_domain = REG_DOMAIN_MKK1;
printk(KERN_ALERT "%s: failed to get regulatory domain: assuming MKK1.\n", dev->name);
}
}
if ((channel = atmel_validate_channel(priv, priv->channel)))
priv->channel = channel;
/* this moves station_state on.... */
atmel_scan(priv, 1);
atmel_set_gcr(priv->dev, GCR_ENINT); /* enable interrupts */
return 0;
}
static int atmel_close (struct net_device *dev)
{
struct atmel_private *priv = netdev_priv(dev);
atmel_enter_state(priv, STATION_STATE_DOWN);
if (priv->bus_type == BUS_TYPE_PCCARD)
atmel_write16(dev, GCR, 0x0060);
atmel_write16(dev, GCR, 0x0040);
return 0;
}
static int atmel_validate_channel(struct atmel_private *priv, int channel)
{
/* check that channel is OK, if so return zero,
else return suitable default channel */
int i;
for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++)
if (priv->reg_domain == channel_table[i].reg_domain) {
if (channel >= channel_table[i].min &&
channel <= channel_table[i].max)
return 0;
else
return channel_table[i].min;
}
return 0;
}
static int atmel_proc_output (char *buf, struct atmel_private *priv)
{
int i;
char *p = buf;
char *s, *r, *c;
p += sprintf(p, "Driver version:\t\t%d.%d\n", DRIVER_MAJOR, DRIVER_MINOR);
if (priv->station_state != STATION_STATE_DOWN) {
p += sprintf(p, "Firmware version:\t%d.%d build %d\nFirmware location:\t",
priv->host_info.major_version,
priv->host_info.minor_version,
priv->host_info.build_version);
if (priv->card_type != CARD_TYPE_EEPROM)
p += sprintf(p, "on card\n");
else if (priv->firmware)
p += sprintf(p, "%s loaded by host\n", priv->firmware_id);
else
p += sprintf(p, "%s loaded by hotplug\n", priv->firmware_id);
switch(priv->card_type) {
case CARD_TYPE_PARALLEL_FLASH: c = "Parallel flash"; break;
case CARD_TYPE_SPI_FLASH: c = "SPI flash\n"; break;
case CARD_TYPE_EEPROM: c = "EEPROM"; break;
default: c = "<unknown>";
}
r = "<unknown>";
for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++)
if (priv->reg_domain == channel_table[i].reg_domain)
r = channel_table[i].name;
p += sprintf(p, "MAC memory type:\t%s\n", c);
p += sprintf(p, "Regulatory domain:\t%s\n", r);
p += sprintf(p, "Host CRC checking:\t%s\n",
priv->do_rx_crc ? "On" : "Off");
p += sprintf(p, "WPA-capable firmware:\t%s\n",
priv->use_wpa ? "Yes" : "No");
}
switch(priv->station_state) {
case STATION_STATE_SCANNING: s = "Scanning"; break;
case STATION_STATE_JOINNING: s = "Joining"; break;
case STATION_STATE_AUTHENTICATING: s = "Authenticating"; break;
case STATION_STATE_ASSOCIATING: s = "Associating"; break;
case STATION_STATE_READY: s = "Ready"; break;
case STATION_STATE_REASSOCIATING: s = "Reassociating"; break;
case STATION_STATE_MGMT_ERROR: s = "Management error"; break;
case STATION_STATE_DOWN: s = "Down"; break;
default: s = "<unknown>";
}
p += sprintf(p, "Current state:\t\t%s\n", s);
return p - buf;
}
static int atmel_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
struct atmel_private *priv = data;
int len = atmel_proc_output (page, priv);
if (len <= off+count) *eof = 1;
*start = page + off;
len -= off;
if (len>count) len = count;
if (len<0) len = 0;
return len;
}
struct net_device *init_atmel_card( unsigned short irq, unsigned long port, const AtmelFWType fw_type,
struct device *sys_dev, int (*card_present)(void *), void *card)
{
struct net_device *dev;
struct atmel_private *priv;
int rc;
/* Create the network device object. */
dev = alloc_etherdev(sizeof(*priv));
if (!dev) {
printk(KERN_ERR "atmel: Couldn't alloc_etherdev\n");
return NULL;
}
if (dev_alloc_name(dev, dev->name) < 0) {
printk(KERN_ERR "atmel: Couldn't get name!\n");
goto err_out_free;
}
priv = netdev_priv(dev);
priv->dev = dev;
priv->sys_dev = sys_dev;
priv->present_callback = card_present;
priv->card = card;
priv->firmware = NULL;
priv->firmware_id[0] = '\0';
priv->firmware_type = fw_type;
if (firmware) /* module parameter */
strcpy(priv->firmware_id, firmware);
priv->bus_type = card_present ? BUS_TYPE_PCCARD : BUS_TYPE_PCI;
priv->station_state = STATION_STATE_DOWN;
priv->do_rx_crc = 0;
/* For PCMCIA cards, some chips need CRC, some don't
so we have to probe. */
if (priv->bus_type == BUS_TYPE_PCCARD) {
priv->probe_crc = 1;
priv->crc_ok_cnt = priv->crc_ko_cnt = 0;
} else
priv->probe_crc = 0;
memset(&priv->stats, 0, sizeof(priv->stats));
memset(&priv->wstats, 0, sizeof(priv->wstats));
priv->last_qual = jiffies;
priv->last_beacon_timestamp = 0;
memset(priv->frag_source, 0xff, sizeof(priv->frag_source));
memset(priv->BSSID, 0, 6);
priv->CurrentBSSID[0] = 0xFF; /* Initialize to something invalid.... */
priv->station_was_associated = 0;
priv->last_survey = jiffies;
priv->preamble = LONG_PREAMBLE;
priv->operating_mode = IW_MODE_INFRA;
priv->connect_to_any_BSS = 0;
priv->config_reg_domain = 0;
priv->reg_domain = 0;
priv->tx_rate = 3;
priv->auto_tx_rate = 1;
priv->channel = 4;
priv->power_mode = 0;
priv->SSID[0] = '\0';
priv->SSID_size = 0;
priv->new_SSID_size = 0;
priv->frag_threshold = 2346;
priv->rts_threshold = 2347;
priv->short_retry = 7;
priv->long_retry = 4;
priv->wep_is_on = 0;
priv->default_key = 0;
priv->encryption_level = 0;
priv->exclude_unencrypted = 0;
priv->group_cipher_suite = priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
priv->use_wpa = 0;
memset(priv->wep_keys, 0, sizeof(priv->wep_keys));
memset(priv->wep_key_len, 0, sizeof(priv->wep_key_len));
priv->default_beacon_period = priv->beacon_period = 100;
priv->listen_interval = 1;
init_timer(&priv->management_timer);
spin_lock_init(&priv->irqlock);
spin_lock_init(&priv->timerlock);
priv->management_timer.function = atmel_management_timer;
priv->management_timer.data = (unsigned long) dev;
dev->open = atmel_open;
dev->stop = atmel_close;
dev->change_mtu = atmel_change_mtu;
dev->set_mac_address = atmel_set_mac_address;
dev->hard_start_xmit = start_tx;
dev->get_stats = atmel_get_stats;
dev->wireless_handlers = (struct iw_handler_def *)&atmel_handler_def;
dev->do_ioctl = atmel_ioctl;
dev->irq = irq;
dev->base_addr = port;
SET_NETDEV_DEV(dev, sys_dev);
if ((rc = request_irq(dev->irq, service_interrupt, SA_SHIRQ, dev->name, dev))) {
printk(KERN_ERR "%s: register interrupt %d failed, rc %d\n", dev->name, irq, rc );
goto err_out_free;
}
if (!request_region(dev->base_addr, 32,
priv->bus_type == BUS_TYPE_PCCARD ? "atmel_cs" : "atmel_pci")) {
goto err_out_irq;
}
if (register_netdev(dev))
goto err_out_res;
if (!probe_atmel_card(dev)){
unregister_netdev(dev);
goto err_out_res;
}
netif_carrier_off(dev);
create_proc_read_entry ("driver/atmel", 0, NULL, atmel_read_proc, priv);
printk(KERN_INFO "%s: Atmel at76c50x. Version %d.%d. MAC %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
dev->name, DRIVER_MAJOR, DRIVER_MINOR,
dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5] );
SET_MODULE_OWNER(dev);
return dev;
err_out_res:
release_region( dev->base_addr, 32);
err_out_irq:
free_irq(dev->irq, dev);
err_out_free:
free_netdev(dev);
return NULL;
}
EXPORT_SYMBOL(init_atmel_card);
void stop_atmel_card(struct net_device *dev)
{
struct atmel_private *priv = netdev_priv(dev);
/* put a brick on it... */
if (priv->bus_type == BUS_TYPE_PCCARD)
atmel_write16(dev, GCR, 0x0060);
atmel_write16(dev, GCR, 0x0040);
del_timer_sync(&priv->management_timer);
unregister_netdev(dev);
remove_proc_entry("driver/atmel", NULL);
free_irq(dev->irq, dev);
kfree(priv->firmware);
release_region(dev->base_addr, 32);
free_netdev(dev);
}
EXPORT_SYMBOL(stop_atmel_card);
static int atmel_set_essid(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *dwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
/* Check if we asked for `any' */
if(dwrq->flags == 0) {
priv->connect_to_any_BSS = 1;
} else {
int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
priv->connect_to_any_BSS = 0;
/* Check the size of the string */
if (dwrq->length > MAX_SSID_LENGTH + 1)
return -E2BIG ;
if (index != 0)
return -EINVAL;
memcpy(priv->new_SSID, extra, dwrq->length - 1);
priv->new_SSID_size = dwrq->length - 1;
}
return -EINPROGRESS;
}
static int atmel_get_essid(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *dwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
/* Get the current SSID */
if (priv->new_SSID_size != 0) {
memcpy(extra, priv->new_SSID, priv->new_SSID_size);
extra[priv->new_SSID_size] = '\0';
dwrq->length = priv->new_SSID_size + 1;
} else {
memcpy(extra, priv->SSID, priv->SSID_size);
extra[priv->SSID_size] = '\0';
dwrq->length = priv->SSID_size + 1;
}
dwrq->flags = !priv->connect_to_any_BSS; /* active */
return 0;
}
static int atmel_get_wap(struct net_device *dev,
struct iw_request_info *info,
struct sockaddr *awrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
memcpy(awrq->sa_data, priv->CurrentBSSID, 6);
awrq->sa_family = ARPHRD_ETHER;
return 0;
}
static int atmel_set_encode(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *dwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
/* Basic checking: do we have a key to set ?
* Note : with the new API, it's impossible to get a NULL pointer.
* Therefore, we need to check a key size == 0 instead.
* New version of iwconfig properly set the IW_ENCODE_NOKEY flag
* when no key is present (only change flags), but older versions
* don't do it. - Jean II */
if (dwrq->length > 0) {
int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
int current_index = priv->default_key;
/* Check the size of the key */
if (dwrq->length > 13) {
return -EINVAL;
}
/* Check the index (none -> use current) */
if (index < 0 || index >= 4)
index = current_index;
else
priv->default_key = index;
/* Set the length */
if (dwrq->length > 5)
priv->wep_key_len[index] = 13;
else
if (dwrq->length > 0)
priv->wep_key_len[index] = 5;
else
/* Disable the key */
priv->wep_key_len[index] = 0;
/* Check if the key is not marked as invalid */
if(!(dwrq->flags & IW_ENCODE_NOKEY)) {
/* Cleanup */
memset(priv->wep_keys[index], 0, 13);
/* Copy the key in the driver */
memcpy(priv->wep_keys[index], extra, dwrq->length);
}
/* WE specify that if a valid key is set, encryption
* should be enabled (user may turn it off later)
* This is also how "iwconfig ethX key on" works */
if (index == current_index &&
priv->wep_key_len[index] > 0) {
priv->wep_is_on = 1;
priv->exclude_unencrypted = 1;
if (priv->wep_key_len[index] > 5) {
priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
priv->encryption_level = 2;
} else {
priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
priv->encryption_level = 1;
}
}
} else {
/* Do we want to just set the transmit key index ? */
int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
if ( index>=0 && index < 4 ) {
priv->default_key = index;
} else
/* Don't complain if only change the mode */
if(!dwrq->flags & IW_ENCODE_MODE) {
return -EINVAL;
}
}
/* Read the flags */
if(dwrq->flags & IW_ENCODE_DISABLED) {
priv->wep_is_on = 0;
priv->encryption_level = 0;
priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
} else {
priv->wep_is_on = 1;
if (priv->wep_key_len[priv->default_key] > 5) {
priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
priv->encryption_level = 2;
} else {
priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
priv->encryption_level = 1;
}
}
if(dwrq->flags & IW_ENCODE_RESTRICTED)
priv->exclude_unencrypted = 1;
if(dwrq->flags & IW_ENCODE_OPEN)
priv->exclude_unencrypted = 0;
return -EINPROGRESS; /* Call commit handler */
}
static int atmel_get_encode(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *dwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
if (!priv->wep_is_on)
dwrq->flags = IW_ENCODE_DISABLED;
else {
if (priv->exclude_unencrypted)
dwrq->flags = IW_ENCODE_RESTRICTED;
else
dwrq->flags = IW_ENCODE_OPEN;
}
/* Which key do we want ? -1 -> tx index */
if (index < 0 || index >= 4)
index = priv->default_key;
dwrq->flags |= index + 1;
/* Copy the key to the user buffer */
dwrq->length = priv->wep_key_len[index];
if (dwrq->length > 16) {
dwrq->length=0;
} else {
memset(extra, 0, 16);
memcpy(extra, priv->wep_keys[index], dwrq->length);
}
return 0;
}
static int atmel_get_name(struct net_device *dev,
struct iw_request_info *info,
char *cwrq,
char *extra)
{
strcpy(cwrq, "IEEE 802.11-DS");
return 0;
}
static int atmel_set_rate(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
if (vwrq->fixed == 0) {
priv->tx_rate = 3;
priv->auto_tx_rate = 1;
} else {
priv->auto_tx_rate = 0;
/* Which type of value ? */
if((vwrq->value < 4) && (vwrq->value >= 0)) {
/* Setting by rate index */
priv->tx_rate = vwrq->value;
} else {
/* Setting by frequency value */
switch (vwrq->value) {
case 1000000: priv->tx_rate = 0; break;
case 2000000: priv->tx_rate = 1; break;
case 5500000: priv->tx_rate = 2; break;
case 11000000: priv->tx_rate = 3; break;
default: return -EINVAL;
}
}
}
return -EINPROGRESS;
}
static int atmel_set_mode(struct net_device *dev,
struct iw_request_info *info,
__u32 *uwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
if (*uwrq != IW_MODE_ADHOC && *uwrq != IW_MODE_INFRA)
return -EINVAL;
priv->operating_mode = *uwrq;
return -EINPROGRESS;
}
static int atmel_get_mode(struct net_device *dev,
struct iw_request_info *info,
__u32 *uwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
*uwrq = priv->operating_mode;
return 0;
}
static int atmel_get_rate(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
if (priv->auto_tx_rate) {
vwrq->fixed = 0;
vwrq->value = 11000000;
} else {
vwrq->fixed = 1;
switch(priv->tx_rate) {
case 0: vwrq->value = 1000000; break;
case 1: vwrq->value = 2000000; break;
case 2: vwrq->value = 5500000; break;
case 3: vwrq->value = 11000000; break;
}
}
return 0;
}
static int atmel_set_power(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
priv->power_mode = vwrq->disabled ? 0 : 1;
return -EINPROGRESS;
}
static int atmel_get_power(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
vwrq->disabled = priv->power_mode ? 0 : 1;
vwrq->flags = IW_POWER_ON;
return 0;
}
static int atmel_set_retry(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
if(!vwrq->disabled && (vwrq->flags & IW_RETRY_LIMIT)) {
if(vwrq->flags & IW_RETRY_MAX)
priv->long_retry = vwrq->value;
else if (vwrq->flags & IW_RETRY_MIN)
priv->short_retry = vwrq->value;
else {
/* No modifier : set both */
priv->long_retry = vwrq->value;
priv->short_retry = vwrq->value;
}
return -EINPROGRESS;
}
return -EINVAL;
}
static int atmel_get_retry(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
vwrq->disabled = 0; /* Can't be disabled */
/* Note : by default, display the min retry number */
if((vwrq->flags & IW_RETRY_MAX)) {
vwrq->flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
vwrq->value = priv->long_retry;
} else {
vwrq->flags = IW_RETRY_LIMIT;
vwrq->value = priv->short_retry;
if(priv->long_retry != priv->short_retry)
vwrq->flags |= IW_RETRY_MIN;
}
return 0;
}
static int atmel_set_rts(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
int rthr = vwrq->value;
if(vwrq->disabled)
rthr = 2347;
if((rthr < 0) || (rthr > 2347)) {
return -EINVAL;
}
priv->rts_threshold = rthr;
return -EINPROGRESS; /* Call commit handler */
}
static int atmel_get_rts(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
vwrq->value = priv->rts_threshold;
vwrq->disabled = (vwrq->value >= 2347);
vwrq->fixed = 1;
return 0;
}
static int atmel_set_frag(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
int fthr = vwrq->value;
if(vwrq->disabled)
fthr = 2346;
if((fthr < 256) || (fthr > 2346)) {
return -EINVAL;
}
fthr &= ~0x1; /* Get an even value - is it really needed ??? */
priv->frag_threshold = fthr;
return -EINPROGRESS; /* Call commit handler */
}
static int atmel_get_frag(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
vwrq->value = priv->frag_threshold;
vwrq->disabled = (vwrq->value >= 2346);
vwrq->fixed = 1;
return 0;
}
static const long frequency_list[] = { 2412, 2417, 2422, 2427, 2432, 2437, 2442,
2447, 2452, 2457, 2462, 2467, 2472, 2484 };
static int atmel_set_freq(struct net_device *dev,
struct iw_request_info *info,
struct iw_freq *fwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
int rc = -EINPROGRESS; /* Call commit handler */
/* If setting by frequency, convert to a channel */
if((fwrq->e == 1) &&
(fwrq->m >= (int) 241200000) &&
(fwrq->m <= (int) 248700000)) {
int f = fwrq->m / 100000;
int c = 0;
while((c < 14) && (f != frequency_list[c]))
c++;
/* Hack to fall through... */
fwrq->e = 0;
fwrq->m = c + 1;
}
/* Setting by channel number */
if((fwrq->m > 1000) || (fwrq->e > 0))
rc = -EOPNOTSUPP;
else {
int channel = fwrq->m;
if (atmel_validate_channel(priv, channel) == 0) {
priv->channel = channel;
} else {
rc = -EINVAL;
}
}
return rc;
}
static int atmel_get_freq(struct net_device *dev,
struct iw_request_info *info,
struct iw_freq *fwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
fwrq->m = priv->channel;
fwrq->e = 0;
return 0;
}
static int atmel_set_scan(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *vwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
unsigned long flags;
/* Note : you may have realised that, as this is a SET operation,
* this is privileged and therefore a normal user can't
* perform scanning.
* This is not an error, while the device perform scanning,
* traffic doesn't flow, so it's a perfect DoS...
* Jean II */
if (priv->station_state == STATION_STATE_DOWN)
return -EAGAIN;
/* Timeout old surveys. */
if ((jiffies - priv->last_survey) > (20 * HZ))
priv->site_survey_state = SITE_SURVEY_IDLE;
priv->last_survey = jiffies;
/* Initiate a scan command */
if (priv->site_survey_state == SITE_SURVEY_IN_PROGRESS)
return -EBUSY;
del_timer_sync(&priv->management_timer);
spin_lock_irqsave(&priv->irqlock, flags);
priv->site_survey_state = SITE_SURVEY_IN_PROGRESS;
priv->fast_scan = 0;
atmel_scan(priv, 0);
spin_unlock_irqrestore(&priv->irqlock, flags);
return 0;
}
static int atmel_get_scan(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *dwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
int i;
char *current_ev = extra;
struct iw_event iwe;
if (priv->site_survey_state != SITE_SURVEY_COMPLETED)
return -EAGAIN;
for(i=0; i<priv->BSS_list_entries; i++) {
iwe.cmd = SIOCGIWAP;
iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
memcpy(iwe.u.ap_addr.sa_data, priv->BSSinfo[i].BSSID, 6);
current_ev = iwe_stream_add_event(current_ev, extra + IW_SCAN_MAX_DATA, &iwe, IW_EV_ADDR_LEN);
iwe.u.data.length = priv->BSSinfo[i].SSIDsize;
if (iwe.u.data.length > 32)
iwe.u.data.length = 32;
iwe.cmd = SIOCGIWESSID;
iwe.u.data.flags = 1;
current_ev = iwe_stream_add_point(current_ev, extra + IW_SCAN_MAX_DATA, &iwe, priv->BSSinfo[i].SSID);
iwe.cmd = SIOCGIWMODE;
iwe.u.mode = priv->BSSinfo[i].BSStype;
current_ev = iwe_stream_add_event(current_ev, extra + IW_SCAN_MAX_DATA, &iwe, IW_EV_UINT_LEN);
iwe.cmd = SIOCGIWFREQ;
iwe.u.freq.m = priv->BSSinfo[i].channel;
iwe.u.freq.e = 0;
current_ev = iwe_stream_add_event(current_ev, extra + IW_SCAN_MAX_DATA, &iwe, IW_EV_FREQ_LEN);
iwe.cmd = SIOCGIWENCODE;
if (priv->BSSinfo[i].UsingWEP)
iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
else
iwe.u.data.flags = IW_ENCODE_DISABLED;
iwe.u.data.length = 0;
current_ev = iwe_stream_add_point(current_ev, extra + IW_SCAN_MAX_DATA, &iwe, NULL);
}
/* Length of data */
dwrq->length = (current_ev - extra);
dwrq->flags = 0;
return 0;
}
static int atmel_get_range(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *dwrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
struct iw_range *range = (struct iw_range *) extra;
int k,i,j;
dwrq->length = sizeof(struct iw_range);
memset(range, 0, sizeof(struct iw_range));
range->min_nwid = 0x0000;
range->max_nwid = 0x0000;
range->num_channels = 0;
for (j = 0; j < sizeof(channel_table)/sizeof(channel_table[0]); j++)
if (priv->reg_domain == channel_table[j].reg_domain) {
range->num_channels = channel_table[j].max - channel_table[j].min + 1;
break;
}
if (range->num_channels != 0) {
for(k = 0, i = channel_table[j].min; i <= channel_table[j].max; i++) {
range->freq[k].i = i; /* List index */
range->freq[k].m = frequency_list[i-1] * 100000;
range->freq[k++].e = 1; /* Values in table in MHz -> * 10^5 * 10 */
}
range->num_frequency = k;
}
range->max_qual.qual = 100;
range->max_qual.level = 100;
range->max_qual.noise = 0;
range->max_qual.updated = IW_QUAL_NOISE_INVALID;
range->avg_qual.qual = 50;
range->avg_qual.level = 50;
range->avg_qual.noise = 0;
range->avg_qual.updated = IW_QUAL_NOISE_INVALID;
range->sensitivity = 0;
range->bitrate[0] = 1000000;
range->bitrate[1] = 2000000;
range->bitrate[2] = 5500000;
range->bitrate[3] = 11000000;
range->num_bitrates = 4;
range->min_rts = 0;
range->max_rts = 2347;
range->min_frag = 256;
range->max_frag = 2346;
range->encoding_size[0] = 5;
range->encoding_size[1] = 13;
range->num_encoding_sizes = 2;
range->max_encoding_tokens = 4;
range->pmp_flags = IW_POWER_ON;
range->pmt_flags = IW_POWER_ON;
range->pm_capa = 0;
range->we_version_source = WIRELESS_EXT;
range->we_version_compiled = WIRELESS_EXT;
range->retry_capa = IW_RETRY_LIMIT ;
range->retry_flags = IW_RETRY_LIMIT;
range->r_time_flags = 0;
range->min_retry = 1;
range->max_retry = 65535;
return 0;
}
static int atmel_set_wap(struct net_device *dev,
struct iw_request_info *info,
struct sockaddr *awrq,
char *extra)
{
struct atmel_private *priv = netdev_priv(dev);
int i;
static const u8 bcast[] = { 255, 255, 255, 255, 255, 255 };
unsigned long flags;
if (awrq->sa_family != ARPHRD_ETHER)
return -EINVAL;
if (memcmp(bcast, awrq->sa_data, 6) == 0) {
del_timer_sync(&priv->management_timer);
spin_lock_irqsave(&priv->irqlock, flags);
atmel_scan(priv, 1);
spin_unlock_irqrestore(&priv->irqlock, flags);
return 0;
}
for(i=0; i<priv->BSS_list_entries; i++) {
if (memcmp(priv->BSSinfo[i].BSSID, awrq->sa_data, 6) == 0) {
if (!priv->wep_is_on && priv->BSSinfo[i].UsingWEP) {
return -EINVAL;
} else if (priv->wep_is_on && !priv->BSSinfo[i].UsingWEP) {
return -EINVAL;
} else {
del_timer_sync(&priv->management_timer);
spin_lock_irqsave(&priv->irqlock, flags);
atmel_join_bss(priv, i);
spin_unlock_irqrestore(&priv->irqlock, flags);
return 0;
}
}
}
return -EINVAL;
}
static int atmel_config_commit(struct net_device *dev,
struct iw_request_info *info, /* NULL */
void *zwrq, /* NULL */
char *extra) /* NULL */
{
return atmel_open(dev);
}
static const iw_handler atmel_handler[] =
{
(iw_handler) atmel_config_commit, /* SIOCSIWCOMMIT */
(iw_handler) atmel_get_name, /* SIOCGIWNAME */
(iw_handler) NULL, /* SIOCSIWNWID */
(iw_handler) NULL, /* SIOCGIWNWID */
(iw_handler) atmel_set_freq, /* SIOCSIWFREQ */
(iw_handler) atmel_get_freq, /* SIOCGIWFREQ */
(iw_handler) atmel_set_mode, /* SIOCSIWMODE */
(iw_handler) atmel_get_mode, /* SIOCGIWMODE */
(iw_handler) NULL, /* SIOCSIWSENS */
(iw_handler) NULL, /* SIOCGIWSENS */
(iw_handler) NULL, /* SIOCSIWRANGE */
(iw_handler) atmel_get_range, /* SIOCGIWRANGE */
(iw_handler) NULL, /* SIOCSIWPRIV */
(iw_handler) NULL, /* SIOCGIWPRIV */
(iw_handler) NULL, /* SIOCSIWSTATS */
(iw_handler) NULL, /* SIOCGIWSTATS */
(iw_handler) NULL, /* SIOCSIWSPY */
(iw_handler) NULL, /* SIOCGIWSPY */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) atmel_set_wap, /* SIOCSIWAP */
(iw_handler) atmel_get_wap, /* SIOCGIWAP */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) NULL, /* SIOCGIWAPLIST */
(iw_handler) atmel_set_scan, /* SIOCSIWSCAN */
(iw_handler) atmel_get_scan, /* SIOCGIWSCAN */
(iw_handler) atmel_set_essid, /* SIOCSIWESSID */
(iw_handler) atmel_get_essid, /* SIOCGIWESSID */
(iw_handler) NULL, /* SIOCSIWNICKN */
(iw_handler) NULL, /* SIOCGIWNICKN */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) atmel_set_rate, /* SIOCSIWRATE */
(iw_handler) atmel_get_rate, /* SIOCGIWRATE */
(iw_handler) atmel_set_rts, /* SIOCSIWRTS */
(iw_handler) atmel_get_rts, /* SIOCGIWRTS */
(iw_handler) atmel_set_frag, /* SIOCSIWFRAG */
(iw_handler) atmel_get_frag, /* SIOCGIWFRAG */
(iw_handler) NULL, /* SIOCSIWTXPOW */
(iw_handler) NULL, /* SIOCGIWTXPOW */
(iw_handler) atmel_set_retry, /* SIOCSIWRETRY */
(iw_handler) atmel_get_retry, /* SIOCGIWRETRY */
(iw_handler) atmel_set_encode, /* SIOCSIWENCODE */
(iw_handler) atmel_get_encode, /* SIOCGIWENCODE */
(iw_handler) atmel_set_power, /* SIOCSIWPOWER */
(iw_handler) atmel_get_power, /* SIOCGIWPOWER */
};
static const iw_handler atmel_private_handler[] =
{
NULL, /* SIOCIWFIRSTPRIV */
};
typedef struct atmel_priv_ioctl {
char id[32];
unsigned char __user *data;
unsigned short len;
} atmel_priv_ioctl;
#define ATMELFWL SIOCIWFIRSTPRIV
#define ATMELIDIFC ATMELFWL + 1
#define ATMELRD ATMELFWL + 2
#define ATMELMAGIC 0x51807
#define REGDOMAINSZ 20
static const struct iw_priv_args atmel_private_args[] = {
/*{ cmd, set_args, get_args, name } */
{ ATMELFWL, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | sizeof (atmel_priv_ioctl), IW_PRIV_TYPE_NONE, "atmelfwl" },
{ ATMELIDIFC, IW_PRIV_TYPE_NONE, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "atmelidifc" },
{ ATMELRD, IW_PRIV_TYPE_CHAR | REGDOMAINSZ, IW_PRIV_TYPE_NONE, "regdomain" },
};
static const struct iw_handler_def atmel_handler_def =
{
.num_standard = sizeof(atmel_handler)/sizeof(iw_handler),
.num_private = sizeof(atmel_private_handler)/sizeof(iw_handler),
.num_private_args = sizeof(atmel_private_args)/sizeof(struct iw_priv_args),
.standard = (iw_handler *) atmel_handler,
.private = (iw_handler *) atmel_private_handler,
.private_args = (struct iw_priv_args *) atmel_private_args,
.get_wireless_stats = atmel_get_wireless_stats
};
static int atmel_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
int i, rc = 0;
struct atmel_private *priv = netdev_priv(dev);
atmel_priv_ioctl com;
struct iwreq *wrq = (struct iwreq *) rq;
unsigned char *new_firmware;
char domain[REGDOMAINSZ+1];
switch (cmd) {
case ATMELIDIFC:
wrq->u.param.value = ATMELMAGIC;
break;
case ATMELFWL:
if (copy_from_user(&com, rq->ifr_data, sizeof(com))) {
rc = -EFAULT;
break;
}
if (!capable(CAP_NET_ADMIN)) {
rc = -EPERM;
break;
}
if (!(new_firmware = kmalloc(com.len, GFP_KERNEL))) {
rc = -ENOMEM;
break;
}
if (copy_from_user(new_firmware, com.data, com.len)) {
kfree(new_firmware);
rc = -EFAULT;
break;
}
kfree(priv->firmware);
priv->firmware = new_firmware;
priv->firmware_length = com.len;
strncpy(priv->firmware_id, com.id, 31);
priv->firmware_id[31] = '\0';
break;
case ATMELRD:
if (copy_from_user(domain, rq->ifr_data, REGDOMAINSZ)) {
rc = -EFAULT;
break;
}
if (!capable(CAP_NET_ADMIN)) {
rc = -EPERM;
break;
}
domain[REGDOMAINSZ] = 0;
rc = -EINVAL;
for (i = 0; i < sizeof(channel_table)/sizeof(channel_table[0]); i++) {
/* strcasecmp doesn't exist in the library */
char *a = channel_table[i].name;
char *b = domain;
while (*a) {
char c1 = *a++;
char c2 = *b++;
if (tolower(c1) != tolower(c2))
break;
}
if (!*a && !*b) {
priv->config_reg_domain = channel_table[i].reg_domain;
rc = 0;
}
}
if (rc == 0 && priv->station_state != STATION_STATE_DOWN)
rc = atmel_open(dev);
break;
default:
rc = -EOPNOTSUPP;
}
return rc;
}
struct auth_body {
u16 alg;
u16 trans_seq;
u16 status;
u8 el_id;
u8 chall_text_len;
u8 chall_text[253];
};
static void atmel_enter_state(struct atmel_private *priv, int new_state)
{
int old_state = priv->station_state;
if (new_state == old_state)
return;
priv->station_state = new_state;
if (new_state == STATION_STATE_READY) {
netif_start_queue(priv->dev);
netif_carrier_on(priv->dev);
}
if (old_state == STATION_STATE_READY) {
netif_carrier_off(priv->dev);
if (netif_running(priv->dev))
netif_stop_queue(priv->dev);
priv->last_beacon_timestamp = 0;
}
}
static void atmel_scan(struct atmel_private *priv, int specific_ssid)
{
struct {
u8 BSSID[6];
u8 SSID[MAX_SSID_LENGTH];
u8 scan_type;
u8 channel;
u16 BSS_type;
u16 min_channel_time;
u16 max_channel_time;
u8 options;
u8 SSID_size;
} cmd;
memset(cmd.BSSID, 0xff, 6);
if (priv->fast_scan) {
cmd.SSID_size = priv->SSID_size;
memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
cmd.min_channel_time = cpu_to_le16(10);
cmd.max_channel_time = cpu_to_le16(50);
} else {
priv->BSS_list_entries = 0;
cmd.SSID_size = 0;
cmd.min_channel_time = cpu_to_le16(10);
cmd.max_channel_time = cpu_to_le16(120);
}
cmd.options = 0;
if (!specific_ssid)
cmd.options |= SCAN_OPTIONS_SITE_SURVEY;
cmd.channel = (priv->channel & 0x7f);
cmd.scan_type = SCAN_TYPE_ACTIVE;
cmd.BSS_type = cpu_to_le16(priv->operating_mode == IW_MODE_ADHOC ?
BSS_TYPE_AD_HOC : BSS_TYPE_INFRASTRUCTURE);
atmel_send_command(priv, CMD_Scan, &cmd, sizeof(cmd));
/* This must come after all hardware access to avoid being messed up
by stuff happening in interrupt context after we leave STATE_DOWN */
atmel_enter_state(priv, STATION_STATE_SCANNING);
}
static void join(struct atmel_private *priv, int type)
{
struct {
u8 BSSID[6];
u8 SSID[MAX_SSID_LENGTH];
u8 BSS_type; /* this is a short in a scan command - weird */
u8 channel;
u16 timeout;
u8 SSID_size;
u8 reserved;
} cmd;
cmd.SSID_size = priv->SSID_size;
memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
memcpy(cmd.BSSID, priv->CurrentBSSID, 6);
cmd.channel = (priv->channel & 0x7f);
cmd.BSS_type = type;
cmd.timeout = cpu_to_le16(2000);
atmel_send_command(priv, CMD_Join, &cmd, sizeof(cmd));
}
static void start(struct atmel_private *priv, int type)
{
struct {
u8 BSSID[6];
u8 SSID[MAX_SSID_LENGTH];
u8 BSS_type;
u8 channel;
u8 SSID_size;
u8 reserved[3];
} cmd;
cmd.SSID_size = priv->SSID_size;
memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
memcpy(cmd.BSSID, priv->BSSID, 6);
cmd.BSS_type = type;
cmd.channel = (priv->channel & 0x7f);
atmel_send_command(priv, CMD_Start, &cmd, sizeof(cmd));
}
static void handle_beacon_probe(struct atmel_private *priv, u16 capability, u8 channel)
{
int rejoin = 0;
int new = capability & C80211_MGMT_CAPABILITY_ShortPreamble ?
SHORT_PREAMBLE : LONG_PREAMBLE;
if (priv->preamble != new) {
priv->preamble = new;
rejoin = 1;
atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_PREAMBLE_TYPE, new);
}
if (priv->channel != channel) {
priv->channel = channel;
rejoin = 1;
atmel_set_mib8(priv, Phy_Mib_Type, PHY_MIB_CHANNEL_POS, channel);
}
if (rejoin) {
priv->station_is_associated = 0;
atmel_enter_state(priv, STATION_STATE_JOINNING);
if (priv->operating_mode == IW_MODE_INFRA)
join(priv, BSS_TYPE_INFRASTRUCTURE);
else
join(priv, BSS_TYPE_AD_HOC);
}
}
static void send_authentication_request(struct atmel_private *priv, u16 system, u8 *challenge, int challenge_len)
{
struct ieee80211_hdr_4addr header;
struct auth_body auth;
header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
header.duration_id = cpu_to_le16(0x8000);
header.seq_ctl = 0;
memcpy(header.addr1, priv->CurrentBSSID, 6);
memcpy(header.addr2, priv->dev->dev_addr, 6);
memcpy(header.addr3, priv->CurrentBSSID, 6);
if (priv->wep_is_on && priv->CurrentAuthentTransactionSeqNum != 1)
/* no WEP for authentication frames with TrSeqNo 1 */
header.frame_ctl |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
auth.alg = cpu_to_le16(system);
auth.status = 0;
auth.trans_seq = cpu_to_le16(priv->CurrentAuthentTransactionSeqNum);
priv->ExpectedAuthentTransactionSeqNum = priv->CurrentAuthentTransactionSeqNum+1;
priv->CurrentAuthentTransactionSeqNum += 2;
if (challenge_len != 0) {
auth.el_id = 16; /* challenge_text */
auth.chall_text_len = challenge_len;
memcpy(auth.chall_text, challenge, challenge_len);
atmel_transmit_management_frame(priv, &header, (u8 *)&auth, 8 + challenge_len);
} else {
atmel_transmit_management_frame(priv, &header, (u8 *)&auth, 6);
}
}
static void send_association_request(struct atmel_private *priv, int is_reassoc)
{
u8 *ssid_el_p;
int bodysize;
struct ieee80211_hdr_4addr header;
struct ass_req_format {
u16 capability;
u16 listen_interval;
u8 ap[6]; /* nothing after here directly accessible */
u8 ssid_el_id;
u8 ssid_len;
u8 ssid[MAX_SSID_LENGTH];
u8 sup_rates_el_id;
u8 sup_rates_len;
u8 rates[4];
} body;
header.frame_ctl = cpu_to_le16(IEEE80211_FTYPE_MGMT |
(is_reassoc ? IEEE80211_STYPE_REASSOC_REQ : IEEE80211_STYPE_ASSOC_REQ));
header.duration_id = cpu_to_le16(0x8000);
header.seq_ctl = 0;
memcpy(header.addr1, priv->CurrentBSSID, 6);
memcpy(header.addr2, priv->dev->dev_addr, 6);
memcpy(header.addr3, priv->CurrentBSSID, 6);
body.capability = cpu_to_le16(C80211_MGMT_CAPABILITY_ESS);
if (priv->wep_is_on)
body.capability |= cpu_to_le16(C80211_MGMT_CAPABILITY_Privacy);
if (priv->preamble == SHORT_PREAMBLE)
body.capability |= cpu_to_le16(C80211_MGMT_CAPABILITY_ShortPreamble);
body.listen_interval = cpu_to_le16(priv->listen_interval * priv->beacon_period);
/* current AP address - only in reassoc frame */
if (is_reassoc) {
memcpy(body.ap, priv->CurrentBSSID, 6);
ssid_el_p = (u8 *)&body.ssid_el_id;
bodysize = 18 + priv->SSID_size;
} else {
ssid_el_p = (u8 *)&body.ap[0];
bodysize = 12 + priv->SSID_size;
}
ssid_el_p[0]= C80211_MGMT_ElementID_SSID;
ssid_el_p[1] = priv->SSID_size;
memcpy(ssid_el_p + 2, priv->SSID, priv->SSID_size);
ssid_el_p[2 + priv->SSID_size] = C80211_MGMT_ElementID_SupportedRates;
ssid_el_p[3 + priv->SSID_size] = 4; /* len of suported rates */
memcpy(ssid_el_p + 4 + priv->SSID_size, atmel_basic_rates, 4);
atmel_transmit_management_frame(priv, &header, (void *)&body, bodysize);
}
static int is_frame_from_current_bss(struct atmel_private *priv, struct ieee80211_hdr_4addr *header)
{
if (le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_FROMDS)
return memcmp(header->addr3, priv->CurrentBSSID, 6) == 0;
else
return memcmp(header->addr2, priv->CurrentBSSID, 6) == 0;
}
static int retrieve_bss(struct atmel_private *priv)
{
int i;
int max_rssi = -128;
int max_index = -1;
if (priv->BSS_list_entries == 0)
return -1;
if (priv->connect_to_any_BSS) {
/* Select a BSS with the max-RSSI but of the same type and of the same WEP mode
and that it is not marked as 'bad' (i.e. we had previously failed to connect to
this BSS with the settings that we currently use) */
priv->current_BSS = 0;
for(i=0; i<priv->BSS_list_entries; i++) {
if (priv->operating_mode == priv->BSSinfo[i].BSStype &&
((!priv->wep_is_on && !priv->BSSinfo[i].UsingWEP) ||
(priv->wep_is_on && priv->BSSinfo[i].UsingWEP)) &&
!(priv->BSSinfo[i].channel & 0x80)) {
max_rssi = priv->BSSinfo[i].RSSI;
priv->current_BSS = max_index = i;
}
}
return max_index;
}
for(i=0; i<priv->BSS_list_entries; i++) {
if (priv->SSID_size == priv->BSSinfo[i].SSIDsize &&
memcmp(priv->SSID, priv->BSSinfo[i].SSID, priv->SSID_size) == 0 &&
priv->operating_mode == priv->BSSinfo[i].BSStype &&
atmel_validate_channel(priv, priv->BSSinfo[i].channel) == 0) {
if (priv->BSSinfo[i].RSSI >= max_rssi) {
max_rssi = priv->BSSinfo[i].RSSI;
max_index = i;
}
}
}
return max_index;
}
static void store_bss_info(struct atmel_private *priv, struct ieee80211_hdr_4addr *header,
u16 capability, u16 beacon_period, u8 channel, u8 rssi,
u8 ssid_len, u8 *ssid, int is_beacon)
{
u8 *bss = capability & C80211_MGMT_CAPABILITY_ESS ? header->addr2 : header->addr3;
int i, index;
for (index = -1, i = 0; i < priv->BSS_list_entries; i++)
if (memcmp(bss, priv->BSSinfo[i].BSSID, 6) == 0)
index = i;
/* If we process a probe and an entry from this BSS exists
we will update the BSS entry with the info from this BSS.
If we process a beacon we will only update RSSI */
if (index == -1) {
if (priv->BSS_list_entries == MAX_BSS_ENTRIES)
return;
index = priv->BSS_list_entries++;
memcpy(priv->BSSinfo[index].BSSID, bss, 6);
priv->BSSinfo[index].RSSI = rssi;
} else {
if (rssi > priv->BSSinfo[index].RSSI)
priv->BSSinfo[index].RSSI = rssi;
if (is_beacon)
return;
}
priv->BSSinfo[index].channel = channel;
priv->BSSinfo[index].beacon_period = beacon_period;
priv->BSSinfo[index].UsingWEP = capability & C80211_MGMT_CAPABILITY_Privacy;
memcpy(priv->BSSinfo[index].SSID, ssid, ssid_len);
priv->BSSinfo[index].SSIDsize = ssid_len;
if (capability & C80211_MGMT_CAPABILITY_IBSS)
priv->BSSinfo[index].BSStype = IW_MODE_ADHOC;
else if (capability & C80211_MGMT_CAPABILITY_ESS)
priv->BSSinfo[index].BSStype =IW_MODE_INFRA;
priv->BSSinfo[index].preamble = capability & C80211_MGMT_CAPABILITY_ShortPreamble ?
SHORT_PREAMBLE : LONG_PREAMBLE;
}
static void authenticate(struct atmel_private *priv, u16 frame_len)
{
struct auth_body *auth = (struct auth_body *)priv->rx_buf;
u16 status = le16_to_cpu(auth->status);
u16 trans_seq_no = le16_to_cpu(auth->trans_seq);
u16 system = le16_to_cpu(auth->alg);
if (status == C80211_MGMT_SC_Success && !priv->wep_is_on) {
/* no WEP */
if (priv->station_was_associated) {
atmel_enter_state(priv, STATION_STATE_REASSOCIATING);
send_association_request(priv, 1);
return;
} else {
atmel_enter_state(priv, STATION_STATE_ASSOCIATING);
send_association_request(priv, 0);
return;
}
}
if (status == C80211_MGMT_SC_Success && priv->wep_is_on) {
/* WEP */
if (trans_seq_no != priv->ExpectedAuthentTransactionSeqNum)
return;
if (trans_seq_no == 0x0002 &&
auth->el_id == C80211_MGMT_ElementID_ChallengeText) {
send_authentication_request(priv, system, auth->chall_text, auth->chall_text_len);
return;
}
if (trans_seq_no == 0x0004) {
if(priv->station_was_associated) {
atmel_enter_state(priv, STATION_STATE_REASSOCIATING);
send_association_request(priv, 1);
return;
} else {
atmel_enter_state(priv, STATION_STATE_ASSOCIATING);
send_association_request(priv, 0);
return;
}
}
}
if (status == C80211_MGMT_SC_AuthAlgNotSupported) {
/* Do opensystem first, then try sharedkey */
if (system == C80211_MGMT_AAN_OPENSYSTEM) {
priv->CurrentAuthentTransactionSeqNum = 0x001;
send_authentication_request(priv, C80211_MGMT_AAN_SHAREDKEY, NULL, 0);
} else if (priv->connect_to_any_BSS) {
int bss_index;
priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;
if ((bss_index = retrieve_bss(priv)) != -1) {
atmel_join_bss(priv, bss_index);
return;
}
}
}
priv->AuthenticationRequestRetryCnt = 0;
atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
priv->station_is_associated = 0;
}
static void associate(struct atmel_private *priv, u16 frame_len, u16 subtype)
{
struct ass_resp_format {
u16 capability;
u16 status;
u16 ass_id;
u8 el_id;
u8 length;
u8 rates[4];
} *ass_resp = (struct ass_resp_format *)priv->rx_buf;
u16 status = le16_to_cpu(ass_resp->status);
u16 ass_id = le16_to_cpu(ass_resp->ass_id);
u16 rates_len = ass_resp->length > 4 ? 4 : ass_resp->length;
if (frame_len < 8 + rates_len)
return;
if (status == C80211_MGMT_SC_Success) {
if (subtype == C80211_SUBTYPE_MGMT_ASS_RESPONSE)
priv->AssociationRequestRetryCnt = 0;
else
priv->ReAssociationRequestRetryCnt = 0;
atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_STATION_ID_POS, ass_id & 0x3fff);
atmel_set_mib(priv, Phy_Mib_Type, PHY_MIB_RATE_SET_POS, ass_resp->rates, rates_len);
if (priv->power_mode == 0) {
priv->listen_interval = 1;
atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_PS_MODE_POS, ACTIVE_MODE);
atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
} else {
priv->listen_interval = 2;
atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_PS_MODE_POS, PS_MODE);
atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 2);
}
priv->station_is_associated = 1;
priv->station_was_associated = 1;
atmel_enter_state(priv, STATION_STATE_READY);
return;
}
if (subtype == C80211_SUBTYPE_MGMT_ASS_RESPONSE &&
status != C80211_MGMT_SC_AssDeniedBSSRate &&
status != C80211_MGMT_SC_SupportCapabilities &&
priv->AssociationRequestRetryCnt < MAX_ASSOCIATION_RETRIES) {
mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
priv->AssociationRequestRetryCnt++;
send_association_request(priv, 0);
return;
}
if (subtype == C80211_SUBTYPE_MGMT_REASS_RESPONSE &&
status != C80211_MGMT_SC_AssDeniedBSSRate &&
status != C80211_MGMT_SC_SupportCapabilities &&
priv->AssociationRequestRetryCnt < MAX_ASSOCIATION_RETRIES) {
mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
priv->ReAssociationRequestRetryCnt++;
send_association_request(priv, 1);
return;
}
atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
priv->station_is_associated = 0;
if(priv->connect_to_any_BSS) {
int bss_index;
priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;
if ((bss_index = retrieve_bss(priv)) != -1)
atmel_join_bss(priv, bss_index);
}
}
void atmel_join_bss(struct atmel_private *priv, int bss_index)
{
struct bss_info *bss = &priv->BSSinfo[bss_index];
memcpy(priv->CurrentBSSID, bss->BSSID, 6);
memcpy(priv->SSID, bss->SSID, priv->SSID_size = bss->SSIDsize);
/* The WPA stuff cares about the current AP address */
if (priv->use_wpa)
build_wpa_mib(priv);
/* When switching to AdHoc turn OFF Power Save if needed */
if (bss->BSStype == IW_MODE_ADHOC &&
priv->operating_mode != IW_MODE_ADHOC &&
priv->power_mode) {
priv->power_mode = 0;
priv->listen_interval = 1;
atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_PS_MODE_POS, ACTIVE_MODE);
atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
}
priv->operating_mode = bss->BSStype;
priv->channel = bss->channel & 0x7f;
priv->beacon_period = bss->beacon_period;
if (priv->preamble != bss->preamble) {
priv->preamble = bss->preamble;
atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_PREAMBLE_TYPE, bss->preamble);
}
if (!priv->wep_is_on && bss->UsingWEP) {
atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
priv->station_is_associated = 0;
return;
}
if (priv->wep_is_on && !bss->UsingWEP) {
atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
priv->station_is_associated = 0;
return;
}
atmel_enter_state(priv, STATION_STATE_JOINNING);
if (priv->operating_mode == IW_MODE_INFRA)
join(priv, BSS_TYPE_INFRASTRUCTURE);
else
join(priv, BSS_TYPE_AD_HOC);
}
static void restart_search(struct atmel_private *priv)
{
int bss_index;
if (!priv->connect_to_any_BSS) {
atmel_scan(priv, 1);
} else {
priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;
if ((bss_index = retrieve_bss(priv)) != -1)
atmel_join_bss(priv, bss_index);
else
atmel_scan(priv, 0);
}
}
static void smooth_rssi(struct atmel_private *priv, u8 rssi)
{
u8 old = priv->wstats.qual.level;
u8 max_rssi = 42; /* 502-rmfd-revd max by experiment, default for now */
switch (priv->firmware_type) {
case ATMEL_FW_TYPE_502E:
max_rssi = 63; /* 502-rmfd-reve max by experiment */
break;
default:
break;
}
rssi = rssi * 100 / max_rssi;
if((rssi + old) % 2)
priv->wstats.qual.level = ((rssi + old)/2) + 1;
else
priv->wstats.qual.level = ((rssi + old)/2);
priv->wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED;
priv->wstats.qual.updated &= ~IW_QUAL_LEVEL_INVALID;
}
static void atmel_smooth_qual(struct atmel_private *priv)
{
unsigned long time_diff = (jiffies - priv->last_qual)/HZ;
while (time_diff--) {
priv->last_qual += HZ;
priv->wstats.qual.qual = priv->wstats.qual.qual/2;
priv->wstats.qual.qual +=
priv->beacons_this_sec * priv->beacon_period * (priv->wstats.qual.level + 100) / 4000;
priv->beacons_this_sec = 0;
}
priv->wstats.qual.updated |= IW_QUAL_QUAL_UPDATED;
priv->wstats.qual.updated &= ~IW_QUAL_QUAL_INVALID;
}
/* deals with incoming managment frames. */
static void atmel_management_frame(struct atmel_private *priv, struct ieee80211_hdr_4addr *header,
u16 frame_len, u8 rssi)
{
u16 subtype;
switch (subtype = le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_STYPE) {
case C80211_SUBTYPE_MGMT_BEACON :
case C80211_SUBTYPE_MGMT_ProbeResponse:
/* beacon frame has multiple variable-length fields -
never let an engineer loose with a data structure design. */
{
struct beacon_format {
u64 timestamp;
u16 interval;
u16 capability;
u8 ssid_el_id;
u8 ssid_length;
/* ssid here */
u8 rates_el_id;
u8 rates_length;
/* rates here */
u8 ds_el_id;
u8 ds_length;
/* ds here */
} *beacon = (struct beacon_format *)priv->rx_buf;
u8 channel, rates_length, ssid_length;
u64 timestamp = le64_to_cpu(beacon->timestamp);
u16 beacon_interval = le16_to_cpu(beacon->interval);
u16 capability = le16_to_cpu(beacon->capability);
u8 *beaconp = priv->rx_buf;
ssid_length = beacon->ssid_length;
/* this blows chunks. */
if (frame_len < 14 || frame_len < ssid_length + 15)
return;
rates_length = beaconp[beacon->ssid_length + 15];
if (frame_len < ssid_length + rates_length + 18)
return;
if (ssid_length > MAX_SSID_LENGTH)
return;
channel = beaconp[ssid_length + rates_length + 18];
if (priv->station_state == STATION_STATE_READY) {
smooth_rssi(priv, rssi);
if (is_frame_from_current_bss(priv, header)) {
priv->beacons_this_sec++;
atmel_smooth_qual(priv);
if (priv->last_beacon_timestamp) {
/* Note truncate this to 32 bits - kernel can't divide a long long */
u32 beacon_delay = timestamp - priv->last_beacon_timestamp;
int beacons = beacon_delay / (beacon_interval * 1000);
if (beacons > 1)
priv->wstats.miss.beacon += beacons - 1;
}
priv->last_beacon_timestamp = timestamp;
handle_beacon_probe(priv, capability, channel);
}
}
if (priv->station_state == STATION_STATE_SCANNING )
store_bss_info(priv, header, capability, beacon_interval, channel,
rssi, ssid_length, &beacon->rates_el_id,
subtype == C80211_SUBTYPE_MGMT_BEACON) ;
}
break;
case C80211_SUBTYPE_MGMT_Authentication:
if (priv->station_state == STATION_STATE_AUTHENTICATING)
authenticate(priv, frame_len);
break;
case C80211_SUBTYPE_MGMT_ASS_RESPONSE:
case C80211_SUBTYPE_MGMT_REASS_RESPONSE:
if (priv->station_state == STATION_STATE_ASSOCIATING ||
priv->station_state == STATION_STATE_REASSOCIATING)
associate(priv, frame_len, subtype);
break;
case C80211_SUBTYPE_MGMT_DISASSOSIATION:
if (priv->station_is_associated &&
priv->operating_mode == IW_MODE_INFRA &&
is_frame_from_current_bss(priv, header)) {
priv->station_was_associated = 0;
priv->station_is_associated = 0;
atmel_enter_state(priv, STATION_STATE_JOINNING);
join(priv, BSS_TYPE_INFRASTRUCTURE);
}
break;
case C80211_SUBTYPE_MGMT_Deauthentication:
if (priv->operating_mode == IW_MODE_INFRA &&
is_frame_from_current_bss(priv, header)) {
priv->station_was_associated = 0;
atmel_enter_state(priv, STATION_STATE_JOINNING);
join(priv, BSS_TYPE_INFRASTRUCTURE);
}
break;
}
}
/* run when timer expires */
static void atmel_management_timer(u_long a)
{
struct net_device *dev = (struct net_device *) a;
struct atmel_private *priv = netdev_priv(dev);
unsigned long flags;
/* Check if the card has been yanked. */
if (priv->card && priv->present_callback &&
!(*priv->present_callback)(priv->card))
return;
spin_lock_irqsave(&priv->irqlock, flags);
switch (priv->station_state) {
case STATION_STATE_AUTHENTICATING:
if (priv->AuthenticationRequestRetryCnt >= MAX_AUTHENTICATION_RETRIES) {
atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
priv->station_is_associated = 0;
priv->AuthenticationRequestRetryCnt = 0;
restart_search(priv);
} else {
priv->AuthenticationRequestRetryCnt++;
priv->CurrentAuthentTransactionSeqNum = 0x0001;
mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
send_authentication_request(priv, C80211_MGMT_AAN_OPENSYSTEM, NULL, 0);
}
break;
case STATION_STATE_ASSOCIATING:
if (priv->AssociationRequestRetryCnt == MAX_ASSOCIATION_RETRIES) {
atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
priv->station_is_associated = 0;
priv->AssociationRequestRetryCnt = 0;
restart_search(priv);
} else {
priv->AssociationRequestRetryCnt++;
mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
send_association_request(priv, 0);
}
break;
case STATION_STATE_REASSOCIATING:
if (priv->ReAssociationRequestRetryCnt == MAX_ASSOCIATION_RETRIES) {
atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
priv->station_is_associated = 0;
priv->ReAssociationRequestRetryCnt = 0;
restart_search(priv);
} else {
priv->ReAssociationRequestRetryCnt++;
mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
send_association_request(priv, 1);
}
break;
default:
break;
}
spin_unlock_irqrestore(&priv->irqlock, flags);
}
static void atmel_command_irq(struct atmel_private *priv)
{
u8 status = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET));
u8 command = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_COMMAND_OFFSET));
int fast_scan;
if (status == CMD_STATUS_IDLE ||
status == CMD_STATUS_IN_PROGRESS)
return;
switch (command){
case CMD_Start:
if (status == CMD_STATUS_COMPLETE) {
priv->station_was_associated = priv->station_is_associated;
atmel_get_mib(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_BSSID_POS,
(u8 *)priv->CurrentBSSID, 6);
atmel_enter_state(priv, STATION_STATE_READY);
}
break;
case CMD_Scan:
fast_scan = priv->fast_scan;
priv->fast_scan = 0;
if (status != CMD_STATUS_COMPLETE) {
atmel_scan(priv, 1);
} else {
int bss_index = retrieve_bss(priv);
if (bss_index != -1) {
atmel_join_bss(priv, bss_index);
} else if (priv->operating_mode == IW_MODE_ADHOC &&
priv->SSID_size != 0) {
start(priv, BSS_TYPE_AD_HOC);
} else {
priv->fast_scan = !fast_scan;
atmel_scan(priv, 1);
}
priv->site_survey_state = SITE_SURVEY_COMPLETED;
}
break;
case CMD_SiteSurvey:
priv->fast_scan = 0;
if (status != CMD_STATUS_COMPLETE)
return;
priv->site_survey_state = SITE_SURVEY_COMPLETED;
if (priv->station_is_associated) {
atmel_enter_state(priv, STATION_STATE_READY);
} else {
atmel_scan(priv, 1);
}
break;
case CMD_Join:
if (status == CMD_STATUS_COMPLETE) {
if (priv->operating_mode == IW_MODE_ADHOC) {
priv->station_was_associated = priv->station_is_associated;
atmel_enter_state(priv, STATION_STATE_READY);
} else {
priv->AuthenticationRequestRetryCnt = 0;
atmel_enter_state(priv, STATION_STATE_AUTHENTICATING);
mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
priv->CurrentAuthentTransactionSeqNum = 0x0001;
send_authentication_request(priv, C80211_MGMT_AAN_SHAREDKEY, NULL, 0);
}
return;
}
atmel_scan(priv, 1);
}
}
static int atmel_wakeup_firmware(struct atmel_private *priv)
{
struct host_info_struct *iface = &priv->host_info;
u16 mr1, mr3;
int i;
if (priv->card_type == CARD_TYPE_SPI_FLASH)
atmel_set_gcr(priv->dev, GCR_REMAP);
/* wake up on-board processor */
atmel_clear_gcr(priv->dev, 0x0040);
atmel_write16(priv->dev, BSR, BSS_SRAM);
if (priv->card_type == CARD_TYPE_SPI_FLASH)
mdelay(100);
/* and wait for it */
for (i = LOOP_RETRY_LIMIT; i; i--) {
mr1 = atmel_read16(priv->dev, MR1);
mr3 = atmel_read16(priv->dev, MR3);
if (mr3 & MAC_BOOT_COMPLETE)
break;
if (mr1 & MAC_BOOT_COMPLETE &&
priv->bus_type == BUS_TYPE_PCCARD)
break;
}
if (i == 0) {
printk(KERN_ALERT "%s: MAC failed to boot.\n", priv->dev->name);
return 0;
}
if ((priv->host_info_base = atmel_read16(priv->dev, MR2)) == 0xffff) {
printk(KERN_ALERT "%s: card missing.\n", priv->dev->name);
return 0;
}
/* now check for completion of MAC initialization through
the FunCtrl field of the IFACE, poll MR1 to detect completion of
MAC initialization, check completion status, set interrupt mask,
enables interrupts and calls Tx and Rx initialization functions */
atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET), FUNC_CTRL_INIT_COMPLETE);
for (i = LOOP_RETRY_LIMIT; i; i--) {
mr1 = atmel_read16(priv->dev, MR1);
mr3 = atmel_read16(priv->dev, MR3);
if (mr3 & MAC_INIT_COMPLETE)
break;
if (mr1 & MAC_INIT_COMPLETE &&
priv->bus_type == BUS_TYPE_PCCARD)
break;
}
if (i == 0) {
printk(KERN_ALERT "%s: MAC failed to initialise.\n", priv->dev->name);
return 0;
}
/* Check for MAC_INIT_OK only on the register that the MAC_INIT_OK was set */
if ((mr3 & MAC_INIT_COMPLETE) &&
!(atmel_read16(priv->dev, MR3) & MAC_INIT_OK)) {
printk(KERN_ALERT "%s: MAC failed MR3 self-test.\n", priv->dev->name);
return 0;
}
if ((mr1 & MAC_INIT_COMPLETE) &&
!(atmel_read16(priv->dev, MR1) & MAC_INIT_OK)) {
printk(KERN_ALERT "%s: MAC failed MR1 self-test.\n", priv->dev->name);
return 0;
}
atmel_copy_to_host(priv->dev, (unsigned char *)iface,
priv->host_info_base, sizeof(*iface));
iface->tx_buff_pos = le16_to_cpu(iface->tx_buff_pos);
iface->tx_buff_size = le16_to_cpu(iface->tx_buff_size);
iface->tx_desc_pos = le16_to_cpu(iface->tx_desc_pos);
iface->tx_desc_count = le16_to_cpu(iface->tx_desc_count);
iface->rx_buff_pos = le16_to_cpu(iface->rx_buff_pos);
iface->rx_buff_size = le16_to_cpu(iface->rx_buff_size);
iface->rx_desc_pos = le16_to_cpu(iface->rx_desc_pos);
iface->rx_desc_count = le16_to_cpu(iface->rx_desc_count);
iface->build_version = le16_to_cpu(iface->build_version);
iface->command_pos = le16_to_cpu(iface->command_pos);
iface->major_version = le16_to_cpu(iface->major_version);
iface->minor_version = le16_to_cpu(iface->minor_version);
iface->func_ctrl = le16_to_cpu(iface->func_ctrl);
iface->mac_status = le16_to_cpu(iface->mac_status);
return 1;
}
/* determine type of memory and MAC address */
static int probe_atmel_card(struct net_device *dev)
{
int rc = 0;
struct atmel_private *priv = netdev_priv(dev);
/* reset pccard */
if (priv->bus_type == BUS_TYPE_PCCARD)
atmel_write16(dev, GCR, 0x0060);
atmel_write16(dev, GCR, 0x0040);
mdelay(500);
if (atmel_read16(dev, MR2) == 0) {
/* No stored firmware so load a small stub which just
tells us the MAC address */
int i;
priv->card_type = CARD_TYPE_EEPROM;
atmel_write16(dev, BSR, BSS_IRAM);
atmel_copy_to_card(dev, 0, mac_reader, sizeof(mac_reader));
atmel_set_gcr(dev, GCR_REMAP);
atmel_clear_gcr(priv->dev, 0x0040);
atmel_write16(dev, BSR, BSS_SRAM);
for (i = LOOP_RETRY_LIMIT; i; i--)
if (atmel_read16(dev, MR3) & MAC_BOOT_COMPLETE)
break;
if (i == 0) {
printk(KERN_ALERT "%s: MAC failed to boot MAC address reader.\n", dev->name);
} else {
atmel_copy_to_host(dev, dev->dev_addr, atmel_read16(dev, MR2), 6);
/* got address, now squash it again until the network
interface is opened */
if (priv->bus_type == BUS_TYPE_PCCARD)
atmel_write16(dev, GCR, 0x0060);
atmel_write16(dev, GCR, 0x0040);
rc = 1;
}
} else if (atmel_read16(dev, MR4) == 0) {
/* Mac address easy in this case. */
priv->card_type = CARD_TYPE_PARALLEL_FLASH;
atmel_write16(dev, BSR, 1);
atmel_copy_to_host(dev, dev->dev_addr, 0xc000, 6);
atmel_write16(dev, BSR, 0x200);
rc = 1;
} else {
/* Standard firmware in flash, boot it up and ask
for the Mac Address */
priv->card_type = CARD_TYPE_SPI_FLASH;
if (atmel_wakeup_firmware(priv)) {
atmel_get_mib(priv, Mac_Address_Mib_Type, 0, dev->dev_addr, 6);
/* got address, now squash it again until the network
interface is opened */
if (priv->bus_type == BUS_TYPE_PCCARD)
atmel_write16(dev, GCR, 0x0060);
atmel_write16(dev, GCR, 0x0040);
rc = 1;
}
}
if (rc) {
if (dev->dev_addr[0] == 0xFF) {
u8 default_mac[] = {0x00,0x04, 0x25, 0x00, 0x00, 0x00};
printk(KERN_ALERT "%s: *** Invalid MAC address. UPGRADE Firmware ****\n", dev->name);
memcpy(dev->dev_addr, default_mac, 6);
}
}
return rc;
}
static void build_wep_mib(struct atmel_private *priv)
/* Move the encyption information on the MIB structure.
This routine is for the pre-WPA firmware: later firmware has
a different format MIB and a different routine. */
{
struct { /* NB this is matched to the hardware, don't change. */
u8 wep_is_on;
u8 default_key; /* 0..3 */
u8 reserved;
u8 exclude_unencrypted;
u32 WEPICV_error_count;
u32 WEP_excluded_count;
u8 wep_keys[MAX_ENCRYPTION_KEYS][13];
u8 encryption_level; /* 0, 1, 2 */
u8 reserved2[3];
} mib;
int i;
mib.wep_is_on = priv->wep_is_on;
if (priv->wep_is_on) {
if (priv->wep_key_len[priv->default_key] > 5)
mib.encryption_level = 2;
else
mib.encryption_level = 1;
} else {
mib.encryption_level = 0;
}
mib.default_key = priv->default_key;
mib.exclude_unencrypted = priv->exclude_unencrypted;
for(i = 0; i < MAX_ENCRYPTION_KEYS; i++)
memcpy(mib.wep_keys[i], priv->wep_keys[i], 13);
atmel_set_mib(priv, Mac_Wep_Mib_Type, 0, (u8 *)&mib, sizeof(mib));
}
static void build_wpa_mib(struct atmel_private *priv)
{
/* This is for the later (WPA enabled) firmware. */
struct { /* NB this is matched to the hardware, don't change. */
u8 cipher_default_key_value[MAX_ENCRYPTION_KEYS][MAX_ENCRYPTION_KEY_SIZE];
u8 receiver_address[6];
u8 wep_is_on;
u8 default_key; /* 0..3 */
u8 group_key;
u8 exclude_unencrypted;
u8 encryption_type;
u8 reserved;
u32 WEPICV_error_count;
u32 WEP_excluded_count;
u8 key_RSC[4][8];
} mib;
int i;
mib.wep_is_on = priv->wep_is_on;
mib.exclude_unencrypted = priv->exclude_unencrypted;
memcpy(mib.receiver_address, priv->CurrentBSSID, 6);
/* zero all the keys before adding in valid ones. */
memset(mib.cipher_default_key_value, 0, sizeof(mib.cipher_default_key_value));
if (priv->wep_is_on) {
/* There's a comment in the Atmel code to the effect that this is only valid
when still using WEP, it may need to be set to something to use WPA */
memset(mib.key_RSC, 0, sizeof(mib.key_RSC));
mib.default_key = mib.group_key = 255;
for (i = 0; i < MAX_ENCRYPTION_KEYS; i++) {
if (priv->wep_key_len[i] > 0) {
memcpy(mib.cipher_default_key_value[i], priv->wep_keys[i], MAX_ENCRYPTION_KEY_SIZE);
if (i == priv->default_key) {
mib.default_key = i;
mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-1] = 7;
mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-2] = priv->pairwise_cipher_suite;
} else {
mib.group_key = i;
priv->group_cipher_suite = priv->pairwise_cipher_suite;
mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-1] = 1;
mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-2] = priv->group_cipher_suite;
}
}
}
if (mib.default_key == 255)
mib.default_key = mib.group_key != 255 ? mib.group_key : 0;
if (mib.group_key == 255)
mib.group_key = mib.default_key;
}
atmel_set_mib(priv, Mac_Wep_Mib_Type, 0, (u8 *)&mib, sizeof(mib));
}
static int reset_atmel_card(struct net_device *dev)
{
/* do everything necessary to wake up the hardware, including
waiting for the lightning strike and throwing the knife switch....
set all the Mib values which matter in the card to match
their settings in the atmel_private structure. Some of these
can be altered on the fly, but many (WEP, infrastucture or ad-hoc)
can only be changed by tearing down the world and coming back through
here.
This routine is also responsible for initialising some
hardware-specific fields in the atmel_private structure,
including a copy of the firmware's hostinfo stucture
which is the route into the rest of the firmare datastructures. */
struct atmel_private *priv = netdev_priv(dev);
u8 configuration;
/* data to add to the firmware names, in priority order
this implemenents firmware versioning */
static char *firmware_modifier[] = {
"-wpa",
"",
NULL
};
/* reset pccard */
if (priv->bus_type == BUS_TYPE_PCCARD)
atmel_write16(priv->dev, GCR, 0x0060);
/* stop card , disable interrupts */
atmel_write16(priv->dev, GCR, 0x0040);
if (priv->card_type == CARD_TYPE_EEPROM) {
/* copy in firmware if needed */
const struct firmware *fw_entry = NULL;
unsigned char *fw;
int len = priv->firmware_length;
if (!(fw = priv->firmware)) {
if (priv->firmware_type == ATMEL_FW_TYPE_NONE) {
if (strlen(priv->firmware_id) == 0) {
printk(KERN_INFO
"%s: card type is unknown: assuming at76c502 firmware is OK.\n",
dev->name);
printk(KERN_INFO
"%s: if not, use the firmware= module parameter.\n",
dev->name);
strcpy(priv->firmware_id, "atmel_at76c502.bin");
}
if (request_firmware(&fw_entry, priv->firmware_id, priv->sys_dev) != 0) {
printk(KERN_ALERT
"%s: firmware %s is missing, cannot continue.\n",
dev->name, priv->firmware_id);
return 0;
}
} else {
int fw_index = 0;
int success = 0;
/* get firmware filename entry based on firmware type ID */
while (fw_table[fw_index].fw_type != priv->firmware_type
&& fw_table[fw_index].fw_type != ATMEL_FW_TYPE_NONE)
fw_index++;
/* construct the actual firmware file name */
if (fw_table[fw_index].fw_type != ATMEL_FW_TYPE_NONE) {
int i;
for (i = 0; firmware_modifier[i]; i++) {
snprintf(priv->firmware_id, 32, "%s%s.%s", fw_table[fw_index].fw_file,
firmware_modifier[i], fw_table[fw_index].fw_file_ext);
priv->firmware_id[31] = '\0';
if (request_firmware(&fw_entry, priv->firmware_id, priv->sys_dev) == 0) {
success = 1;
break;
}
}
}
if (!success) {
printk(KERN_ALERT
"%s: firmware %s is missing, cannot start.\n",
dev->name, priv->firmware_id);
priv->firmware_id[0] = '\0';
return 0;
}
}
fw = fw_entry->data;
len = fw_entry->size;
}
if (len <= 0x6000) {
atmel_write16(priv->dev, BSR, BSS_IRAM);
atmel_copy_to_card(priv->dev, 0, fw, len);
atmel_set_gcr(priv->dev, GCR_REMAP);
} else {
/* Remap */
atmel_set_gcr(priv->dev, GCR_REMAP);
atmel_write16(priv->dev, BSR, BSS_IRAM);
atmel_copy_to_card(priv->dev, 0, fw, 0x6000);
atmel_write16(priv->dev, BSR, 0x2ff);
atmel_copy_to_card(priv->dev, 0x8000, &fw[0x6000], len - 0x6000);
}
if (fw_entry)
release_firmware(fw_entry);
}
if (!atmel_wakeup_firmware(priv))
return 0;
/* Check the version and set the correct flag for wpa stuff,
old and new firmware is incompatible.
The pre-wpa 3com firmware reports major version 5,
the wpa 3com firmware is major version 4 and doesn't need
the 3com broken-ness filter. */
priv->use_wpa = (priv->host_info.major_version == 4);
priv->radio_on_broken = (priv->host_info.major_version == 5);
/* unmask all irq sources */
atmel_wmem8(priv, atmel_hi(priv, IFACE_INT_MASK_OFFSET), 0xff);
/* int Tx system and enable Tx */
atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, 0), 0);
atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, 0), 0x80000000L);
atmel_wmem16(priv, atmel_tx(priv, TX_DESC_POS_OFFSET, 0), 0);
atmel_wmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, 0), 0);
priv->tx_desc_free = priv->host_info.tx_desc_count;
priv->tx_desc_head = 0;
priv->tx_desc_tail = 0;
priv->tx_desc_previous = 0;
priv->tx_free_mem = priv->host_info.tx_buff_size;
priv->tx_buff_head = 0;
priv->tx_buff_tail = 0;
configuration = atmel_rmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET));
atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET),
configuration | FUNC_CTRL_TxENABLE);
/* init Rx system and enable */
priv->rx_desc_head = 0;
configuration = atmel_rmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET));
atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET),
configuration | FUNC_CTRL_RxENABLE);
if (!priv->radio_on_broken) {
if (atmel_send_command_wait(priv, CMD_EnableRadio, NULL, 0) ==
CMD_STATUS_REJECTED_RADIO_OFF) {
printk(KERN_INFO
"%s: cannot turn the radio on. (Hey radio, you're beautiful!)\n",
dev->name);
return 0;
}
}
/* set up enough MIB values to run. */
atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_AUTO_TX_RATE_POS, priv->auto_tx_rate);
atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_TX_PROMISCUOUS_POS, PROM_MODE_OFF);
atmel_set_mib16(priv, Mac_Mib_Type, MAC_MIB_RTS_THRESHOLD_POS, priv->rts_threshold);
atmel_set_mib16(priv, Mac_Mib_Type, MAC_MIB_FRAG_THRESHOLD_POS, priv->frag_threshold);
atmel_set_mib8(priv, Mac_Mib_Type, MAC_MIB_SHORT_RETRY_POS, priv->short_retry);
atmel_set_mib8(priv, Mac_Mib_Type, MAC_MIB_LONG_RETRY_POS, priv->long_retry);
atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_PREAMBLE_TYPE, priv->preamble);
atmel_set_mib(priv, Mac_Address_Mib_Type, MAC_ADDR_MIB_MAC_ADDR_POS,
priv->dev->dev_addr, 6);
atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_PS_MODE_POS, ACTIVE_MODE);
atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_BEACON_PER_POS, priv->default_beacon_period);
atmel_set_mib(priv, Phy_Mib_Type, PHY_MIB_RATE_SET_POS, atmel_basic_rates, 4);
atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_PRIVACY_POS, priv->wep_is_on);
if (priv->use_wpa)
build_wpa_mib(priv);
else
build_wep_mib(priv);
return 1;
}
static void atmel_send_command(struct atmel_private *priv, int command, void *cmd, int cmd_size)
{
if (cmd)
atmel_copy_to_card(priv->dev, atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET),
cmd, cmd_size);
atmel_wmem8(priv, atmel_co(priv, CMD_BLOCK_COMMAND_OFFSET), command);
atmel_wmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET), 0);
}
static int atmel_send_command_wait(struct atmel_private *priv, int command, void *cmd, int cmd_size)
{
int i, status;
atmel_send_command(priv, command, cmd, cmd_size);
for (i = 5000; i; i--) {
status = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET));
if (status != CMD_STATUS_IDLE &&
status != CMD_STATUS_IN_PROGRESS)
break;
udelay(20);
}
if (i == 0) {
printk(KERN_ALERT "%s: failed to contact MAC.\n", priv->dev->name);
status = CMD_STATUS_HOST_ERROR;
} else {
if (command != CMD_EnableRadio)
status = CMD_STATUS_COMPLETE;
}
return status;
}
static u8 atmel_get_mib8(struct atmel_private *priv, u8 type, u8 index)
{
struct get_set_mib m;
m.type = type;
m.size = 1;
m.index = index;
atmel_send_command_wait(priv, CMD_Get_MIB_Vars, &m, MIB_HEADER_SIZE + 1);
return atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET + MIB_HEADER_SIZE));
}
static void atmel_set_mib8(struct atmel_private *priv, u8 type, u8 index, u8 data)
{
struct get_set_mib m;
m.type = type;
m.size = 1;
m.index = index;
m.data[0] = data;
atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + 1);
}
static void atmel_set_mib16(struct atmel_private *priv, u8 type, u8 index, u16 data)
{
struct get_set_mib m;
m.type = type;
m.size = 2;
m.index = index;
m.data[0] = data;
m.data[1] = data >> 8;
atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + 2);
}
static void atmel_set_mib(struct atmel_private *priv, u8 type, u8 index, u8 *data, int data_len)
{
struct get_set_mib m;
m.type = type;
m.size = data_len;
m.index = index;
if (data_len > MIB_MAX_DATA_BYTES)
printk(KERN_ALERT "%s: MIB buffer too small.\n", priv->dev->name);
memcpy(m.data, data, data_len);
atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + data_len);
}
static void atmel_get_mib(struct atmel_private *priv, u8 type, u8 index, u8 *data, int data_len)
{
struct get_set_mib m;
m.type = type;
m.size = data_len;
m.index = index;
if (data_len > MIB_MAX_DATA_BYTES)
printk(KERN_ALERT "%s: MIB buffer too small.\n", priv->dev->name);
atmel_send_command_wait(priv, CMD_Get_MIB_Vars, &m, MIB_HEADER_SIZE + data_len);
atmel_copy_to_host(priv->dev, data,
atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET + MIB_HEADER_SIZE), data_len);
}
static void atmel_writeAR(struct net_device *dev, u16 data)
{
int i;
outw(data, dev->base_addr + AR);
/* Address register appears to need some convincing..... */
for (i = 0; data != inw(dev->base_addr + AR) && i<10; i++)
outw(data, dev->base_addr + AR);
}
static void atmel_copy_to_card(struct net_device *dev, u16 dest, unsigned char *src, u16 len)
{
int i;
atmel_writeAR(dev, dest);
if (dest % 2) {
atmel_write8(dev, DR, *src);
src++; len--;
}
for (i = len; i > 1 ; i -= 2) {
u8 lb = *src++;
u8 hb = *src++;
atmel_write16(dev, DR, lb | (hb << 8));
}
if (i)
atmel_write8(dev, DR, *src);
}
static void atmel_copy_to_host(struct net_device *dev, unsigned char *dest, u16 src, u16 len)
{
int i;
atmel_writeAR(dev, src);
if (src % 2) {
*dest = atmel_read8(dev, DR);
dest++; len--;
}
for (i = len; i > 1 ; i -= 2) {
u16 hw = atmel_read16(dev, DR);
*dest++ = hw;
*dest++ = hw >> 8;
}
if (i)
*dest = atmel_read8(dev, DR);
}
static void atmel_set_gcr(struct net_device *dev, u16 mask)
{
outw(inw(dev->base_addr + GCR) | mask, dev->base_addr + GCR);
}
static void atmel_clear_gcr(struct net_device *dev, u16 mask)
{
outw(inw(dev->base_addr + GCR) & ~mask, dev->base_addr + GCR);
}
static int atmel_lock_mac(struct atmel_private *priv)
{
int i, j = 20;
retry:
for (i = 5000; i; i--) {
if (!atmel_rmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_HOST_OFFSET)))
break;
udelay(20);
}
if (!i) return 0; /* timed out */
atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 1);
if (atmel_rmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_HOST_OFFSET))) {
atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);
if (!j--) return 0; /* timed out */
goto retry;
}
return 1;
}
static void atmel_wmem32(struct atmel_private *priv, u16 pos, u32 data)
{
atmel_writeAR(priv->dev, pos);
atmel_write16(priv->dev, DR, data); /* card is little-endian */
atmel_write16(priv->dev, DR, data >> 16);
}
/***************************************************************************/
/* There follows the source form of the MAC address reading firmware */
/***************************************************************************/
#if 0
/* Copyright 2003 Matthew T. Russotto */
/* But derived from the Atmel 76C502 firmware written by Atmel and */
/* included in "atmel wireless lan drivers" package */
/**
This file is part of net.russotto.AtmelMACFW, hereto referred to
as AtmelMACFW
AtmelMACFW is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.
AtmelMACFW is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with AtmelMACFW; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
****************************************************************************/
/* This firmware should work on the 76C502 RFMD, RFMD_D, and RFMD_E */
/* It will probably work on the 76C504 and 76C502 RFMD_3COM */
/* It only works on SPI EEPROM versions of the card. */
/* This firmware initializes the SPI controller and clock, reads the MAC */
/* address from the EEPROM into SRAM, and puts the SRAM offset of the MAC */
/* address in MR2, and sets MR3 to 0x10 to indicate it is done */
/* It also puts a complete copy of the EEPROM in SRAM with the offset in */
/* MR4, for investigational purposes (maybe we can determine chip type */
/* from that?) */
.org 0
.set MRBASE, 0x8000000
.set CPSR_INITIAL, 0xD3 /* IRQ/FIQ disabled, ARM mode, Supervisor state */
.set CPSR_USER, 0xD1 /* IRQ/FIQ disabled, ARM mode, USER state */
.set SRAM_BASE, 0x02000000
.set SP_BASE, 0x0F300000
.set UNK_BASE, 0x0F000000 /* Some internal device, but which one? */
.set SPI_CGEN_BASE, 0x0E000000 /* Some internal device, but which one? */
.set UNK3_BASE, 0x02014000 /* Some internal device, but which one? */
.set STACK_BASE, 0x5600
.set SP_SR, 0x10
.set SP_TDRE, 2 /* status register bit -- TDR empty */
.set SP_RDRF, 1 /* status register bit -- RDR full */
.set SP_SWRST, 0x80
.set SP_SPIEN, 0x1
.set SP_CR, 0 /* control register */
.set SP_MR, 4 /* mode register */
.set SP_RDR, 0x08 /* Read Data Register */
.set SP_TDR, 0x0C /* Transmit Data Register */
.set SP_CSR0, 0x30 /* chip select registers */
.set SP_CSR1, 0x34
.set SP_CSR2, 0x38
.set SP_CSR3, 0x3C
.set NVRAM_CMD_RDSR, 5 /* read status register */
.set NVRAM_CMD_READ, 3 /* read data */
.set NVRAM_SR_RDY, 1 /* RDY bit. This bit is inverted */
.set SPI_8CLOCKS, 0xFF /* Writing this to the TDR doesn't do anything to the
serial output, since SO is normally high. But it
does cause 8 clock cycles and thus 8 bits to be
clocked in to the chip. See Atmel's SPI
controller (e.g. AT91M55800) timing and 4K
SPI EEPROM manuals */
.set NVRAM_SCRATCH, 0x02000100 /* arbitrary area for scratchpad memory */
.set NVRAM_IMAGE, 0x02000200
.set NVRAM_LENGTH, 0x0200
.set MAC_ADDRESS_MIB, SRAM_BASE
.set MAC_ADDRESS_LENGTH, 6
.set MAC_BOOT_FLAG, 0x10
.set MR1, 0
.set MR2, 4
.set MR3, 8
.set MR4, 0xC
RESET_VECTOR:
b RESET_HANDLER
UNDEF_VECTOR:
b HALT1
SWI_VECTOR:
b HALT1
IABORT_VECTOR:
b HALT1
DABORT_VECTOR:
RESERVED_VECTOR:
b HALT1
IRQ_VECTOR:
b HALT1
FIQ_VECTOR:
b HALT1
HALT1: b HALT1
RESET_HANDLER:
mov r0, #CPSR_INITIAL
msr CPSR_c, r0 /* This is probably unnecessary */
/* I'm guessing this is initializing clock generator electronics for SPI */
ldr r0, =SPI_CGEN_BASE
mov r1, #0
mov r1, r1, lsl #3
orr r1,r1, #0
str r1, [r0]
ldr r1, [r0, #28]
bic r1, r1, #16
str r1, [r0, #28]
mov r1, #1
str r1, [r0, #8]
ldr r0, =MRBASE
mov r1, #0
strh r1, [r0, #MR1]
strh r1, [r0, #MR2]
strh r1, [r0, #MR3]
strh r1, [r0, #MR4]
mov sp, #STACK_BASE
bl SP_INIT
mov r0, #10
bl DELAY9
bl GET_MAC_ADDR
bl GET_WHOLE_NVRAM
ldr r0, =MRBASE
ldr r1, =MAC_ADDRESS_MIB
strh r1, [r0, #MR2]
ldr r1, =NVRAM_IMAGE
strh r1, [r0, #MR4]
mov r1, #MAC_BOOT_FLAG
strh r1, [r0, #MR3]
HALT2: b HALT2
.func Get_Whole_NVRAM, GET_WHOLE_NVRAM
GET_WHOLE_NVRAM:
stmdb sp!, {lr}
mov r2, #0 /* 0th bytes of NVRAM */
mov r3, #NVRAM_LENGTH
mov r1, #0 /* not used in routine */
ldr r0, =NVRAM_IMAGE
bl NVRAM_XFER
ldmia sp!, {lr}
bx lr
.endfunc
.func Get_MAC_Addr, GET_MAC_ADDR
GET_MAC_ADDR:
stmdb sp!, {lr}
mov r2, #0x120 /* address of MAC Address within NVRAM */
mov r3, #MAC_ADDRESS_LENGTH
mov r1, #0 /* not used in routine */
ldr r0, =MAC_ADDRESS_MIB
bl NVRAM_XFER
ldmia sp!, {lr}
bx lr
.endfunc
.ltorg
.func Delay9, DELAY9
DELAY9:
adds r0, r0, r0, LSL #3 /* r0 = r0 * 9 */
DELAYLOOP:
beq DELAY9_done
subs r0, r0, #1
b DELAYLOOP
DELAY9_done:
bx lr
.endfunc
.func SP_Init, SP_INIT
SP_INIT:
mov r1, #SP_SWRST
ldr r0, =SP_BASE
str r1, [r0, #SP_CR] /* reset the SPI */
mov r1, #0
str r1, [r0, #SP_CR] /* release SPI from reset state */
mov r1, #SP_SPIEN
str r1, [r0, #SP_MR] /* set the SPI to MASTER mode*/
str r1, [r0, #SP_CR] /* enable the SPI */
/* My guess would be this turns on the SPI clock */
ldr r3, =SPI_CGEN_BASE
ldr r1, [r3, #28]
orr r1, r1, #0x2000
str r1, [r3, #28]
ldr r1, =0x2000c01
str r1, [r0, #SP_CSR0]
ldr r1, =0x2000201
str r1, [r0, #SP_CSR1]
str r1, [r0, #SP_CSR2]
str r1, [r0, #SP_CSR3]
ldr r1, [r0, #SP_SR]
ldr r0, [r0, #SP_RDR]
bx lr
.endfunc
.func NVRAM_Init, NVRAM_INIT
NVRAM_INIT:
ldr r1, =SP_BASE
ldr r0, [r1, #SP_RDR]
mov r0, #NVRAM_CMD_RDSR
str r0, [r1, #SP_TDR]
SP_loop1:
ldr r0, [r1, #SP_SR]
tst r0, #SP_TDRE
beq SP_loop1
mov r0, #SPI_8CLOCKS
str r0, [r1, #SP_TDR]
SP_loop2:
ldr r0, [r1, #SP_SR]
tst r0, #SP_TDRE
beq SP_loop2
ldr r0, [r1, #SP_RDR]
SP_loop3:
ldr r0, [r1, #SP_SR]
tst r0, #SP_RDRF
beq SP_loop3
ldr r0, [r1, #SP_RDR]
and r0, r0, #255
bx lr
.endfunc
.func NVRAM_Xfer, NVRAM_XFER
/* r0 = dest address */
/* r1 = not used */
/* r2 = src address within NVRAM */
/* r3 = length */
NVRAM_XFER:
stmdb sp!, {r4, r5, lr}
mov r5, r0 /* save r0 (dest address) */
mov r4, r3 /* save r3 (length) */
mov r0, r2, LSR #5 /* SPI memories put A8 in the command field */
and r0, r0, #8
add r0, r0, #NVRAM_CMD_READ
ldr r1, =NVRAM_SCRATCH
strb r0, [r1, #0] /* save command in NVRAM_SCRATCH[0] */
strb r2, [r1, #1] /* save low byte of source address in NVRAM_SCRATCH[1] */
_local1:
bl NVRAM_INIT
tst r0, #NVRAM_SR_RDY
bne _local1
mov r0, #20
bl DELAY9
mov r2, r4 /* length */
mov r1, r5 /* dest address */
mov r0, #2 /* bytes to transfer in command */
bl NVRAM_XFER2
ldmia sp!, {r4, r5, lr}
bx lr
.endfunc
.func NVRAM_Xfer2, NVRAM_XFER2
NVRAM_XFER2:
stmdb sp!, {r4, r5, r6, lr}
ldr r4, =SP_BASE
mov r3, #0
cmp r0, #0
bls _local2
ldr r5, =NVRAM_SCRATCH
_local4:
ldrb r6, [r5, r3]
str r6, [r4, #SP_TDR]
_local3:
ldr r6, [r4, #SP_SR]
tst r6, #SP_TDRE
beq _local3
add r3, r3, #1
cmp r3, r0 /* r0 is # of bytes to send out (command+addr) */
blo _local4
_local2:
mov r3, #SPI_8CLOCKS
str r3, [r4, #SP_TDR]
ldr r0, [r4, #SP_RDR]
_local5:
ldr r0, [r4, #SP_SR]
tst r0, #SP_RDRF
beq _local5
ldr r0, [r4, #SP_RDR] /* what's this byte? It's the byte read while writing the TDR -- nonsense, because the NVRAM doesn't read and write at the same time */
mov r0, #0
cmp r2, #0 /* r2 is # of bytes to copy in */
bls _local6
_local7:
ldr r5, [r4, #SP_SR]
tst r5, #SP_TDRE
beq _local7
str r3, [r4, #SP_TDR] /* r3 has SPI_8CLOCKS */
_local8:
ldr r5, [r4, #SP_SR]
tst r5, #SP_RDRF
beq _local8
ldr r5, [r4, #SP_RDR] /* but didn't we read this byte above? */
strb r5, [r1], #1 /* postindexed */
add r0, r0, #1
cmp r0, r2
blo _local7 /* since we don't send another address, the NVRAM must be capable of sequential reads */
_local6:
mov r0, #200
bl DELAY9
ldmia sp!, {r4, r5, r6, lr}
bx lr
#endif
