535 lines
16 KiB
C
535 lines
16 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* hermes.h
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*
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* Driver core for the "Hermes" wireless MAC controller, as used in
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* the Lucent Orinoco and Cabletron RoamAbout cards. It should also
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* work on the hfa3841 and hfa3842 MAC controller chips used in the
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* Prism I & II chipsets.
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*
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* This is not a complete driver, just low-level access routines for
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* the MAC controller itself.
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*
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* Based on the prism2 driver from Absolute Value Systems' linux-wlan
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* project, the Linux wvlan_cs driver, Lucent's HCF-Light
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* (wvlan_hcf.c) library, and the NetBSD wireless driver.
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*
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* Copyright (C) 2000, David Gibson, Linuxcare Australia.
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* (C) Copyright David Gibson, IBM Corp. 2001-2003.
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*
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* Portions taken from hfa384x.h.
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* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
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*/
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#ifndef _HERMES_H
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#define _HERMES_H
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/* Notes on locking:
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*
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* As a module of low level hardware access routines, there is no
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* locking. Users of this module should ensure that they serialize
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* access to the hermes structure, and to the hardware
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*/
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#include <linux/if_ether.h>
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#include <linux/io.h>
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/*
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* Limits and constants
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*/
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#define HERMES_ALLOC_LEN_MIN (4)
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#define HERMES_ALLOC_LEN_MAX (2400)
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#define HERMES_LTV_LEN_MAX (34)
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#define HERMES_BAP_DATALEN_MAX (4096)
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#define HERMES_BAP_OFFSET_MAX (4096)
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#define HERMES_PORTID_MAX (7)
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#define HERMES_NUMPORTS_MAX (HERMES_PORTID_MAX + 1)
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#define HERMES_PDR_LEN_MAX (260) /* in bytes, from EK */
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#define HERMES_PDA_RECS_MAX (200) /* a guess */
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#define HERMES_PDA_LEN_MAX (1024) /* in bytes, from EK */
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#define HERMES_SCANRESULT_MAX (35)
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#define HERMES_CHINFORESULT_MAX (8)
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#define HERMES_MAX_MULTICAST (16)
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#define HERMES_MAGIC (0x7d1f)
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/*
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* Hermes register offsets
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*/
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#define HERMES_CMD (0x00)
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#define HERMES_PARAM0 (0x02)
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#define HERMES_PARAM1 (0x04)
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#define HERMES_PARAM2 (0x06)
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#define HERMES_STATUS (0x08)
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#define HERMES_RESP0 (0x0A)
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#define HERMES_RESP1 (0x0C)
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#define HERMES_RESP2 (0x0E)
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#define HERMES_INFOFID (0x10)
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#define HERMES_RXFID (0x20)
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#define HERMES_ALLOCFID (0x22)
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#define HERMES_TXCOMPLFID (0x24)
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#define HERMES_SELECT0 (0x18)
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#define HERMES_OFFSET0 (0x1C)
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#define HERMES_DATA0 (0x36)
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#define HERMES_SELECT1 (0x1A)
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#define HERMES_OFFSET1 (0x1E)
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#define HERMES_DATA1 (0x38)
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#define HERMES_EVSTAT (0x30)
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#define HERMES_INTEN (0x32)
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#define HERMES_EVACK (0x34)
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#define HERMES_CONTROL (0x14)
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#define HERMES_SWSUPPORT0 (0x28)
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#define HERMES_SWSUPPORT1 (0x2A)
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#define HERMES_SWSUPPORT2 (0x2C)
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#define HERMES_AUXPAGE (0x3A)
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#define HERMES_AUXOFFSET (0x3C)
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#define HERMES_AUXDATA (0x3E)
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/*
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* CMD register bitmasks
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*/
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#define HERMES_CMD_BUSY (0x8000)
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#define HERMES_CMD_AINFO (0x7f00)
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#define HERMES_CMD_MACPORT (0x0700)
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#define HERMES_CMD_RECL (0x0100)
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#define HERMES_CMD_WRITE (0x0100)
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#define HERMES_CMD_PROGMODE (0x0300)
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#define HERMES_CMD_CMDCODE (0x003f)
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/*
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* STATUS register bitmasks
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*/
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#define HERMES_STATUS_RESULT (0x7f00)
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#define HERMES_STATUS_CMDCODE (0x003f)
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/*
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* OFFSET register bitmasks
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*/
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#define HERMES_OFFSET_BUSY (0x8000)
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#define HERMES_OFFSET_ERR (0x4000)
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#define HERMES_OFFSET_DATAOFF (0x0ffe)
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/*
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* Event register bitmasks (INTEN, EVSTAT, EVACK)
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*/
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#define HERMES_EV_TICK (0x8000)
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#define HERMES_EV_WTERR (0x4000)
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#define HERMES_EV_INFDROP (0x2000)
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#define HERMES_EV_INFO (0x0080)
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#define HERMES_EV_DTIM (0x0020)
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#define HERMES_EV_CMD (0x0010)
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#define HERMES_EV_ALLOC (0x0008)
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#define HERMES_EV_TXEXC (0x0004)
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#define HERMES_EV_TX (0x0002)
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#define HERMES_EV_RX (0x0001)
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/*
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* Command codes
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*/
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/*--- Controller Commands ----------------------------*/
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#define HERMES_CMD_INIT (0x0000)
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#define HERMES_CMD_ENABLE (0x0001)
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#define HERMES_CMD_DISABLE (0x0002)
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#define HERMES_CMD_DIAG (0x0003)
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/*--- Buffer Mgmt Commands ---------------------------*/
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#define HERMES_CMD_ALLOC (0x000A)
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#define HERMES_CMD_TX (0x000B)
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/*--- Regulate Commands ------------------------------*/
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#define HERMES_CMD_NOTIFY (0x0010)
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#define HERMES_CMD_INQUIRE (0x0011)
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/*--- Configure Commands -----------------------------*/
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#define HERMES_CMD_ACCESS (0x0021)
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#define HERMES_CMD_DOWNLD (0x0022)
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/*--- Serial I/O Commands ----------------------------*/
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#define HERMES_CMD_READMIF (0x0030)
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#define HERMES_CMD_WRITEMIF (0x0031)
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/*--- Debugging Commands -----------------------------*/
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#define HERMES_CMD_TEST (0x0038)
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/* Test command arguments */
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#define HERMES_TEST_SET_CHANNEL 0x0800
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#define HERMES_TEST_MONITOR 0x0b00
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#define HERMES_TEST_STOP 0x0f00
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/* Authentication algorithms */
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#define HERMES_AUTH_OPEN 1
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#define HERMES_AUTH_SHARED_KEY 2
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/* WEP settings */
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#define HERMES_WEP_PRIVACY_INVOKED 0x0001
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#define HERMES_WEP_EXCL_UNENCRYPTED 0x0002
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#define HERMES_WEP_HOST_ENCRYPT 0x0010
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#define HERMES_WEP_HOST_DECRYPT 0x0080
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/* Symbol hostscan options */
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#define HERMES_HOSTSCAN_SYMBOL_5SEC 0x0001
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#define HERMES_HOSTSCAN_SYMBOL_ONCE 0x0002
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#define HERMES_HOSTSCAN_SYMBOL_PASSIVE 0x0040
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#define HERMES_HOSTSCAN_SYMBOL_BCAST 0x0080
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/*
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* Frame structures and constants
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*/
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#define HERMES_DESCRIPTOR_OFFSET 0
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#define HERMES_802_11_OFFSET (14)
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#define HERMES_802_3_OFFSET (14 + 32)
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#define HERMES_802_2_OFFSET (14 + 32 + 14)
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#define HERMES_TXCNTL2_OFFSET (HERMES_802_3_OFFSET - 2)
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#define HERMES_RXSTAT_ERR (0x0003)
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#define HERMES_RXSTAT_BADCRC (0x0001)
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#define HERMES_RXSTAT_UNDECRYPTABLE (0x0002)
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#define HERMES_RXSTAT_MIC (0x0010) /* Frame contains MIC */
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#define HERMES_RXSTAT_MACPORT (0x0700)
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#define HERMES_RXSTAT_PCF (0x1000) /* Frame was received in CF period */
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#define HERMES_RXSTAT_MIC_KEY_ID (0x1800) /* MIC key used */
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#define HERMES_RXSTAT_MSGTYPE (0xE000)
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#define HERMES_RXSTAT_1042 (0x2000) /* RFC-1042 frame */
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#define HERMES_RXSTAT_TUNNEL (0x4000) /* bridge-tunnel encoded frame */
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#define HERMES_RXSTAT_WMP (0x6000) /* Wavelan-II Management Protocol frame */
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/* Shift amount for key ID in RXSTAT and TXCTRL */
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#define HERMES_MIC_KEY_ID_SHIFT 11
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struct hermes_tx_descriptor {
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__le16 status;
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__le16 reserved1;
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__le16 reserved2;
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__le32 sw_support;
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u8 retry_count;
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u8 tx_rate;
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__le16 tx_control;
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} __packed;
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#define HERMES_TXSTAT_RETRYERR (0x0001)
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#define HERMES_TXSTAT_AGEDERR (0x0002)
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#define HERMES_TXSTAT_DISCON (0x0004)
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#define HERMES_TXSTAT_FORMERR (0x0008)
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#define HERMES_TXCTRL_TX_OK (0x0002) /* ?? interrupt on Tx complete */
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#define HERMES_TXCTRL_TX_EX (0x0004) /* ?? interrupt on Tx exception */
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#define HERMES_TXCTRL_802_11 (0x0008) /* We supply 802.11 header */
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#define HERMES_TXCTRL_MIC (0x0010) /* 802.3 + TKIP */
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#define HERMES_TXCTRL_MIC_KEY_ID (0x1800) /* MIC Key ID mask */
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#define HERMES_TXCTRL_ALT_RTRY (0x0020)
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/* Inquiry constants and data types */
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#define HERMES_INQ_TALLIES (0xF100)
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#define HERMES_INQ_SCAN (0xF101)
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#define HERMES_INQ_CHANNELINFO (0xF102)
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#define HERMES_INQ_HOSTSCAN (0xF103)
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#define HERMES_INQ_HOSTSCAN_SYMBOL (0xF104)
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#define HERMES_INQ_LINKSTATUS (0xF200)
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#define HERMES_INQ_SEC_STAT_AGERE (0xF202)
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struct hermes_tallies_frame {
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__le16 TxUnicastFrames;
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__le16 TxMulticastFrames;
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__le16 TxFragments;
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__le16 TxUnicastOctets;
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__le16 TxMulticastOctets;
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__le16 TxDeferredTransmissions;
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__le16 TxSingleRetryFrames;
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__le16 TxMultipleRetryFrames;
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__le16 TxRetryLimitExceeded;
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__le16 TxDiscards;
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__le16 RxUnicastFrames;
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__le16 RxMulticastFrames;
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__le16 RxFragments;
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__le16 RxUnicastOctets;
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__le16 RxMulticastOctets;
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__le16 RxFCSErrors;
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__le16 RxDiscards_NoBuffer;
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__le16 TxDiscardsWrongSA;
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__le16 RxWEPUndecryptable;
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__le16 RxMsgInMsgFragments;
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__le16 RxMsgInBadMsgFragments;
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/* Those last are probably not available in very old firmwares */
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__le16 RxDiscards_WEPICVError;
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__le16 RxDiscards_WEPExcluded;
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} __packed;
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/* Grabbed from wlan-ng - Thanks Mark... - Jean II
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* This is the result of a scan inquiry command */
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/* Structure describing info about an Access Point */
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struct prism2_scan_apinfo {
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__le16 channel; /* Channel where the AP sits */
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__le16 noise; /* Noise level */
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__le16 level; /* Signal level */
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u8 bssid[ETH_ALEN]; /* MAC address of the Access Point */
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__le16 beacon_interv; /* Beacon interval */
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__le16 capabilities; /* Capabilities */
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__le16 essid_len; /* ESSID length */
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u8 essid[32]; /* ESSID of the network */
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u8 rates[10]; /* Bit rate supported */
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__le16 proberesp_rate; /* Data rate of the response frame */
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__le16 atim; /* ATIM window time, Kus (hostscan only) */
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} __packed;
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/* Same stuff for the Lucent/Agere card.
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* Thanks to h1kari <h1kari AT dachb0den.com> - Jean II */
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struct agere_scan_apinfo {
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__le16 channel; /* Channel where the AP sits */
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__le16 noise; /* Noise level */
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__le16 level; /* Signal level */
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u8 bssid[ETH_ALEN]; /* MAC address of the Access Point */
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__le16 beacon_interv; /* Beacon interval */
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__le16 capabilities; /* Capabilities */
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/* bits: 0-ess, 1-ibss, 4-privacy [wep] */
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__le16 essid_len; /* ESSID length */
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u8 essid[32]; /* ESSID of the network */
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} __packed;
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/* Moustafa: Scan structure for Symbol cards */
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struct symbol_scan_apinfo {
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u8 channel; /* Channel where the AP sits */
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u8 unknown1; /* 8 in 2.9x and 3.9x f/w, 0 otherwise */
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__le16 noise; /* Noise level */
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__le16 level; /* Signal level */
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u8 bssid[ETH_ALEN]; /* MAC address of the Access Point */
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__le16 beacon_interv; /* Beacon interval */
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__le16 capabilities; /* Capabilities */
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/* bits: 0-ess, 1-ibss, 4-privacy [wep] */
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__le16 essid_len; /* ESSID length */
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u8 essid[32]; /* ESSID of the network */
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__le16 rates[5]; /* Bit rate supported */
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__le16 basic_rates; /* Basic rates bitmask */
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u8 unknown2[6]; /* Always FF:FF:FF:FF:00:00 */
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u8 unknown3[8]; /* Always 0, appeared in f/w 3.91-68 */
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} __packed;
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union hermes_scan_info {
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struct agere_scan_apinfo a;
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struct prism2_scan_apinfo p;
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struct symbol_scan_apinfo s;
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};
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/* Extended scan struct for HERMES_INQ_CHANNELINFO.
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* wl_lkm calls this an ACS scan (Automatic Channel Select).
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* Keep out of union hermes_scan_info because it is much bigger than
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* the older scan structures. */
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struct agere_ext_scan_info {
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__le16 reserved0;
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u8 noise;
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u8 level;
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u8 rx_flow;
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u8 rate;
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__le16 reserved1[2];
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__le16 frame_control;
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__le16 dur_id;
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u8 addr1[ETH_ALEN];
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u8 addr2[ETH_ALEN];
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u8 bssid[ETH_ALEN];
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__le16 sequence;
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u8 addr4[ETH_ALEN];
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__le16 data_length;
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/* Next 3 fields do not get filled in. */
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u8 daddr[ETH_ALEN];
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u8 saddr[ETH_ALEN];
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__le16 len_type;
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__le64 timestamp;
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__le16 beacon_interval;
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__le16 capabilities;
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u8 data[];
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} __packed;
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#define HERMES_LINKSTATUS_NOT_CONNECTED (0x0000)
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#define HERMES_LINKSTATUS_CONNECTED (0x0001)
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#define HERMES_LINKSTATUS_DISCONNECTED (0x0002)
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#define HERMES_LINKSTATUS_AP_CHANGE (0x0003)
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#define HERMES_LINKSTATUS_AP_OUT_OF_RANGE (0x0004)
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#define HERMES_LINKSTATUS_AP_IN_RANGE (0x0005)
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#define HERMES_LINKSTATUS_ASSOC_FAILED (0x0006)
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struct hermes_linkstatus {
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__le16 linkstatus; /* Link status */
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} __packed;
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struct hermes_response {
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u16 status, resp0, resp1, resp2;
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};
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/* "ID" structure - used for ESSID and station nickname */
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struct hermes_idstring {
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__le16 len;
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__le16 val[16];
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} __packed;
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struct hermes_multicast {
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u8 addr[HERMES_MAX_MULTICAST][ETH_ALEN];
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} __packed;
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/* Timeouts */
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#define HERMES_BAP_BUSY_TIMEOUT (10000) /* In iterations of ~1us */
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struct hermes;
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/* Functions to access hardware */
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struct hermes_ops {
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int (*init)(struct hermes *hw);
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int (*cmd_wait)(struct hermes *hw, u16 cmd, u16 parm0,
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struct hermes_response *resp);
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int (*init_cmd_wait)(struct hermes *hw, u16 cmd,
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u16 parm0, u16 parm1, u16 parm2,
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struct hermes_response *resp);
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int (*allocate)(struct hermes *hw, u16 size, u16 *fid);
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int (*read_ltv)(struct hermes *hw, int bap, u16 rid, unsigned buflen,
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u16 *length, void *buf);
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int (*read_ltv_pr)(struct hermes *hw, int bap, u16 rid,
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unsigned buflen, u16 *length, void *buf);
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int (*write_ltv)(struct hermes *hw, int bap, u16 rid,
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u16 length, const void *value);
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int (*bap_pread)(struct hermes *hw, int bap, void *buf, int len,
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u16 id, u16 offset);
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int (*bap_pwrite)(struct hermes *hw, int bap, const void *buf,
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int len, u16 id, u16 offset);
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int (*read_pda)(struct hermes *hw, __le16 *pda,
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u32 pda_addr, u16 pda_len);
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int (*program_init)(struct hermes *hw, u32 entry_point);
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int (*program_end)(struct hermes *hw);
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int (*program)(struct hermes *hw, const char *buf,
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u32 addr, u32 len);
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void (*lock_irqsave)(spinlock_t *lock, unsigned long *flags);
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void (*unlock_irqrestore)(spinlock_t *lock, unsigned long *flags);
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void (*lock_irq)(spinlock_t *lock);
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void (*unlock_irq)(spinlock_t *lock);
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};
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/* Basic control structure */
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struct hermes {
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void __iomem *iobase;
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int reg_spacing;
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#define HERMES_16BIT_REGSPACING 0
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#define HERMES_32BIT_REGSPACING 1
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u16 inten; /* Which interrupts should be enabled? */
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bool eeprom_pda;
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const struct hermes_ops *ops;
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void *priv;
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};
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/* Register access convenience macros */
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#define hermes_read_reg(hw, off) \
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(ioread16((hw)->iobase + ((off) << (hw)->reg_spacing)))
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#define hermes_write_reg(hw, off, val) \
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(iowrite16((val), (hw)->iobase + ((off) << (hw)->reg_spacing)))
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#define hermes_read_regn(hw, name) hermes_read_reg((hw), HERMES_##name)
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#define hermes_write_regn(hw, name, val) \
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hermes_write_reg((hw), HERMES_##name, (val))
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/* Function prototypes */
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void hermes_struct_init(struct hermes *hw, void __iomem *address,
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int reg_spacing);
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/* Inline functions */
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static inline int hermes_present(struct hermes *hw)
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{
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return hermes_read_regn(hw, SWSUPPORT0) == HERMES_MAGIC;
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}
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static inline void hermes_set_irqmask(struct hermes *hw, u16 events)
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{
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hw->inten = events;
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hermes_write_regn(hw, INTEN, events);
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|
}
|
|
|
|
static inline int hermes_enable_port(struct hermes *hw, int port)
|
|
{
|
|
return hw->ops->cmd_wait(hw, HERMES_CMD_ENABLE | (port << 8),
|
|
0, NULL);
|
|
}
|
|
|
|
static inline int hermes_disable_port(struct hermes *hw, int port)
|
|
{
|
|
return hw->ops->cmd_wait(hw, HERMES_CMD_DISABLE | (port << 8),
|
|
0, NULL);
|
|
}
|
|
|
|
/* Initiate an INQUIRE command (tallies or scan). The result will come as an
|
|
* information frame in __orinoco_ev_info() */
|
|
static inline int hermes_inquire(struct hermes *hw, u16 rid)
|
|
{
|
|
return hw->ops->cmd_wait(hw, HERMES_CMD_INQUIRE, rid, NULL);
|
|
}
|
|
|
|
#define HERMES_BYTES_TO_RECLEN(n) ((((n) + 1) / 2) + 1)
|
|
#define HERMES_RECLEN_TO_BYTES(n) (((n) - 1) * 2)
|
|
|
|
/* Note that for the next two, the count is in 16-bit words, not bytes */
|
|
static inline void hermes_read_words(struct hermes *hw, int off,
|
|
void *buf, unsigned count)
|
|
{
|
|
off = off << hw->reg_spacing;
|
|
ioread16_rep(hw->iobase + off, buf, count);
|
|
}
|
|
|
|
static inline void hermes_write_bytes(struct hermes *hw, int off,
|
|
const char *buf, unsigned count)
|
|
{
|
|
off = off << hw->reg_spacing;
|
|
iowrite16_rep(hw->iobase + off, buf, count >> 1);
|
|
if (unlikely(count & 1))
|
|
iowrite8(buf[count - 1], hw->iobase + off);
|
|
}
|
|
|
|
static inline void hermes_clear_words(struct hermes *hw, int off,
|
|
unsigned count)
|
|
{
|
|
unsigned i;
|
|
|
|
off = off << hw->reg_spacing;
|
|
|
|
for (i = 0; i < count; i++)
|
|
iowrite16(0, hw->iobase + off);
|
|
}
|
|
|
|
#define HERMES_READ_RECORD(hw, bap, rid, buf) \
|
|
(hw->ops->read_ltv((hw), (bap), (rid), sizeof(*buf), NULL, (buf)))
|
|
#define HERMES_READ_RECORD_PR(hw, bap, rid, buf) \
|
|
(hw->ops->read_ltv_pr((hw), (bap), (rid), sizeof(*buf), NULL, (buf)))
|
|
#define HERMES_WRITE_RECORD(hw, bap, rid, buf) \
|
|
(hw->ops->write_ltv((hw), (bap), (rid), \
|
|
HERMES_BYTES_TO_RECLEN(sizeof(*buf)), (buf)))
|
|
|
|
static inline int hermes_read_wordrec(struct hermes *hw, int bap, u16 rid,
|
|
u16 *word)
|
|
{
|
|
__le16 rec;
|
|
int err;
|
|
|
|
err = HERMES_READ_RECORD(hw, bap, rid, &rec);
|
|
*word = le16_to_cpu(rec);
|
|
return err;
|
|
}
|
|
|
|
static inline int hermes_read_wordrec_pr(struct hermes *hw, int bap, u16 rid,
|
|
u16 *word)
|
|
{
|
|
__le16 rec;
|
|
int err;
|
|
|
|
err = HERMES_READ_RECORD_PR(hw, bap, rid, &rec);
|
|
*word = le16_to_cpu(rec);
|
|
return err;
|
|
}
|
|
|
|
static inline int hermes_write_wordrec(struct hermes *hw, int bap, u16 rid,
|
|
u16 word)
|
|
{
|
|
__le16 rec = cpu_to_le16(word);
|
|
return HERMES_WRITE_RECORD(hw, bap, rid, &rec);
|
|
}
|
|
|
|
#endif /* _HERMES_H */
|