/**************************************************************************
Etherboot - BOOTP/TFTP Bootstrap Program
Prism2 NIC driver for Etherboot
Written by Michael Brown of Fen Systems Ltd
$Id$
***************************************************************************/
/*
* 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, or (at
* your option) any later version.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <etherboot.h>
#include <nic.h>
#include <gpxe/pci.h>
#include <gpxe/ethernet.h>
/*
* Hard-coded SSID
* Leave blank in order to connect to any available SSID
*/
static const char hardcoded_ssid[] = "";
/*
* Maximum number of info packets to wait for on a join attempt.
* Some APs (including the Linksys WAP11) will send a "you are disconnected" packet
* before sending the "you are connected" packet, if the card has previously been
* attached to the AP.
*
* 2 is probably a sensible value, but YMMV.
*/
#define MAX_JOIN_INFO_COUNT 2
/*
* Type of Prism2 interface to support
* If not already defined, select PLX
*/
#ifndef WLAN_HOSTIF
#define WLAN_HOSTIF WLAN_PLX
#endif
/*
* Include wlan_compat, p80211 and hfa384x header files from Linux Prism2 driver
* We need to hack some defines in order to avoid compiling kernel-specific routines
*/
#define __LINUX_WLAN__
#undef __KERNEL__
#define __I386__
#include "wlan_compat.h"
#include "p80211hdr.h"
#include "hfa384x.h"
#define BAP_TIMEOUT ( 5000 )
/*
* A few hacks to make the coding environment more Linux-like. This makes it somewhat
* quicker to convert code from the Linux Prism2 driver.
*/
#include <errno.h>
#define __le16_to_cpu(x) (x)
#define __le32_to_cpu(x) (x)
#define __cpu_to_le16(x) (x)
#define __cpu_to_le32(x) (x)
#define hfa384x2host_16(n) (__le16_to_cpu((UINT16)(n)))
#define hfa384x2host_32(n) (__le32_to_cpu((UINT32)(n)))
#define host2hfa384x_16(n) (__cpu_to_le16((UINT16)(n)))
#define host2hfa384x_32(n) (__cpu_to_le32((UINT32)(n)))
/*
* PLX9052 PCI register offsets
* Taken from PLX9052 datasheet available from http://www.plxtech.com/download/9052/databook/9052db-20.pdf
*/
#define PLX_LOCAL_CONFIG_REGISTER_BASE ( PCI_BASE_ADDRESS_1 )
#define PLX_LOCAL_ADDRESS_SPACE_0_BASE ( PCI_BASE_ADDRESS_2 )
#define PLX_LOCAL_ADDRESS_SPACE_1_BASE ( PCI_BASE_ADDRESS_3 )
#define PLX_LOCAL_ADDRESS_SPACE_2_BASE ( PCI_BASE_ADDRESS_4 )
#define PLX_LOCAL_ADDRESS_SPACE_3_BASE ( PCI_BASE_ADDRESS_5 )
#define PRISM2_PLX_ATTR_MEM_BASE ( PLX_LOCAL_ADDRESS_SPACE_0_BASE )
#define PRISM2_PLX_IO_BASE ( PLX_LOCAL_ADDRESS_SPACE_1_BASE )
#define PRISM2_PCI_MEM_BASE ( PCI_BASE_ADDRESS_0 )
/*
* PCMCIA CIS types
* Taken from cistpl.h in pcmcia-cs
*/
#define CISTPL_VERS_1 ( 0x15 )
#define CISTPL_END ( 0xff )
#define CIS_STEP ( 2 )
#define CISTPL_HEADER_LEN ( 2 * CIS_STEP )
#define CISTPL_LEN_OFF ( 1 * CIS_STEP )
#define CISTPL_VERS_1_STR_OFF ( 4 * CIS_STEP )
/*
* Prism2 constants
* Taken from prism2sta.c in linux-wlan-ng
*/
#define COR_OFFSET ( 0x3e0 ) /* COR attribute offset of Prism2 PC card */
#define COR_VALUE ( 0x41 ) /* Enable PC card with irq in level trigger (but interrupts disabled) */
/* NIC specific static variables */
/* The hfa384x_t structure is used extensively in the Linux driver but is ifdef'd out in our include since __KERNEL__ is not defined.
* This is a dummy version that contains only the fields we are interested in.
*/
typedef struct hfa384x
{
UINT32 iobase;
void *membase;
UINT16 lastcmd;
UINT16 status; /* in host order */
UINT16 resp0; /* in host order */
UINT16 resp1; /* in host order */
UINT16 resp2; /* in host order */
UINT8 bssid[WLAN_BSSID_LEN];
} hfa384x_t;
/* The global instance of the hardware (i.e. where we store iobase and membase, in the absence of anywhere better to put them */
static hfa384x_t hw_global = {
0, 0, 0, 0, 0, 0, 0, {0,0,0,0,0,0}
};
/*
* 802.11 headers in addition to those in hfa384x_tx_frame_t (LLC and SNAP)
* Taken from p80211conv.h
*/
typedef struct wlan_llc
{
UINT8 dsap;
UINT8 ssap;
UINT8 ctl;
} wlan_llc_t;
static const wlan_llc_t wlan_llc_snap = { 0xaa, 0xaa, 0x03 }; /* LLC header indicating SNAP (?) */
#define WLAN_IEEE_OUI_LEN 3
typedef struct wlan_snap
{
UINT8 oui[WLAN_IEEE_OUI_LEN];
UINT16 type;
} wlan_snap_t;
typedef struct wlan_80211hdr
{
wlan_llc_t llc;
wlan_snap_t snap;
} wlan_80211hdr_t;
/*
* Function prototypes
*/
/*
* Hardware-level hfa384x functions
* These are based on the ones in hfa384x.h (which are ifdef'd out since __KERNEL__ is not defined).
* Basically, these functions are the result of hand-evaluating all the ifdefs and defines in the hfa384x.h versions.
*/
/* Retrieve the value of one of the MAC registers. */
static inline UINT16 hfa384x_getreg( hfa384x_t *hw, UINT reg )
{
#if (WLAN_HOSTIF == WLAN_PLX)
return inw ( hw->iobase + reg );
#elif (WLAN_HOSTIF == WLAN_PCI)
return readw ( hw->membase + reg );
#endif
}
/* Set the value of one of the MAC registers. */
static inline void hfa384x_setreg( hfa384x_t *hw, UINT16 val, UINT reg )
{
#if (WLAN_HOSTIF == WLAN_PLX)
outw ( val, hw->iobase + reg );
#elif (WLAN_HOSTIF == WLAN_PCI)
writew ( val, hw->membase + reg );
#endif
return;
}
/*
* Noswap versions
* Etherboot is i386 only, so swap and noswap are the same...
*/
static inline UINT16 hfa384x_getreg_noswap( hfa384x_t *hw, UINT reg )
{
return hfa384x_getreg ( hw, reg );
}
static inline void hfa384x_setreg_noswap( hfa384x_t *hw, UINT16 val, UINT reg )
{
hfa384x_setreg ( hw, val, reg );
}
/*
* Low-level hfa384x functions
* These are based on the ones in hfa384x.c, modified to work in the Etherboot environment.
*/
/*
* hfa384x_docmd_wait
*
* Waits for availability of the Command register, then
* issues the given command. Then polls the Evstat register
* waiting for command completion.
* Arguments:
* hw device structure
* cmd Command in host order
* parm0 Parameter0 in host order
* parm1 Parameter1 in host order
* parm2 Parameter2 in host order
* Returns:
* 0 success
* >0 command indicated error, Status and Resp0-2 are
* in hw structure.
*/
static int hfa384x_docmd_wait( hfa384x_t *hw, UINT16 cmd, UINT16 parm0, UINT16 parm1, UINT16 parm2)
{
UINT16 reg = 0;
UINT16 counter = 0;
/* wait for the busy bit to clear */
counter = 0;
reg = hfa384x_getreg(hw, HFA384x_CMD);
while ( HFA384x_CMD_ISBUSY(reg) && (counter < 10) ) {
reg = hfa384x_getreg(hw, HFA384x_CMD);
counter++;
udelay(10);
}
if (HFA384x_CMD_ISBUSY(reg)) {
printf("hfa384x_cmd timeout(1), reg=0x%0hx.\n", reg);
return -ETIMEDOUT;
}
/* busy bit clear, write command */
hfa384x_setreg(hw, parm0, HFA384x_PARAM0);
hfa384x_setreg(hw, parm1, HFA384x_PARAM1);
hfa384x_setreg(hw, parm2, HFA384x_PARAM2);
hw->lastcmd = cmd;
hfa384x_setreg(hw, cmd, HFA384x_CMD);
/* Now wait for completion */
counter = 0;
reg = hfa384x_getreg(hw, HFA384x_EVSTAT);
/* Initialization is the problem. It takes about
100ms. "normal" commands are typically is about
200-400 us (I've never seen less than 200). Longer
is better so that we're not hammering the bus. */
while ( !HFA384x_EVSTAT_ISCMD(reg) && (counter < 5000)) {
reg = hfa384x_getreg(hw, HFA384x_EVSTAT);
counter++;
udelay(200);
}
if ( ! HFA384x_EVSTAT_ISCMD(reg) ) {
printf("hfa384x_cmd timeout(2), reg=0x%0hx.\n", reg);
return -ETIMEDOUT;
}
/* Read status and response */
hw->status = hfa384x_getreg(hw, HFA384x_STATUS);
hw->resp0 = hfa384x_getreg(hw, HFA384x_RESP0);
hw->resp1 = hfa384x_getreg(hw, HFA384x_RESP1);
hw->resp2 = hfa384x_getreg(hw, HFA384x_RESP2);
hfa384x_setreg(hw, HFA384x_EVACK_CMD, HFA384x_EVACK);
return HFA384x_STATUS_RESULT_GET(hw->status);
}
/*
* Prepare BAP for access. Assigns FID and RID, sets offset register
* and waits for BAP to become available.
*
* Arguments:
* hw device structure
* id FID or RID, destined for the select register (host order)
* offset An _even_ offset into the buffer for the given FID/RID.
* Returns:
* 0 success
*/
static int hfa384x_prepare_bap(hfa384x_t *hw, UINT16 id, UINT16 offset)
{
int result = 0;
UINT16 reg;
UINT16 i;
/* Validate offset, buf, and len */
if ( (offset > HFA384x_BAP_OFFSET_MAX) || (offset % 2) ) {
result = -EINVAL;
} else {
/* Write fid/rid and offset */
hfa384x_setreg(hw, id, HFA384x_SELECT0);
udelay(10);
hfa384x_setreg(hw, offset, HFA384x_OFFSET0);
/* Wait for offset[busy] to clear (see BAP_TIMEOUT) */
i = 0;
do {
reg = hfa384x_getreg(hw, HFA384x_OFFSET0);
if ( i > 0 ) udelay(2);
i++;
} while ( i < BAP_TIMEOUT && HFA384x_OFFSET_ISBUSY(reg));
if ( i >= BAP_TIMEOUT ) {
/* failure */
result = reg;
} else if ( HFA384x_OFFSET_ISERR(reg) ){
/* failure */
result = reg;
}
}
return result;
}
/*
* Copy data from BAP to memory.
*
* Arguments:
* hw device structure
* id FID or RID, destined for the select register (host order)
* offset An _even_ offset into the buffer for the given FID/RID.
* buf ptr to array of bytes
* len length of data to transfer in bytes
* Returns:
* 0 success
*/
static int hfa384x_copy_from_bap(hfa384x_t *hw, UINT16 id, UINT16 offset,
void *buf, UINT len)
{
int result = 0;
UINT8 *d = (UINT8*)buf;
UINT16 i;
UINT16 reg = 0;
/* Prepare BAP */
result = hfa384x_prepare_bap ( hw, id, offset );
if ( result == 0 ) {
/* Read even(len) buf contents from data reg */
for ( i = 0; i < (len & 0xfffe); i+=2 ) {
*(UINT16*)(&(d[i])) = hfa384x_getreg_noswap(hw, HFA384x_DATA0);
}
/* If len odd, handle last byte */
if ( len % 2 ){
reg = hfa384x_getreg_noswap(hw, HFA384x_DATA0);
d[len-1] = ((UINT8*)(®))[0];
}
}
if (result) {
printf ( "copy_from_bap(%#hx, %#hx, %d) failed, result=%#hx\n", id, offset, len, result);
}
return result;
}
/*
* Copy data from memory to BAP.
*
* Arguments:
* hw device structure
* id FID or RID, destined for the select register (host order)
* offset An _even_ offset into the buffer for the given FID/RID.
* buf ptr to array of bytes
* len length of data to transfer in bytes
* Returns:
* 0 success
*/
static int hfa384x_copy_to_bap(hfa384x_t *hw, UINT16 id, UINT16 offset,
void *buf, UINT len)
{
int result = 0;
UINT8 *d = (UINT8*)buf;
UINT16 i;
UINT16 savereg;
/* Prepare BAP */
result = hfa384x_prepare_bap ( hw, id, offset );
if ( result == 0 ) {
/* Write even(len) buf contents to data reg */
for ( i = 0; i < (len & 0xfffe); i+=2 ) {
hfa384x_setreg_noswap(hw, *(UINT16*)(&(d[i])), HFA384x_DATA0);
}
/* If len odd, handle last byte */
if ( len % 2 ){
savereg = hfa384x_getreg_noswap(hw, HFA384x_DATA0);
result = hfa384x_prepare_bap ( hw, id, offset + (len & 0xfffe) );
if ( result == 0 ) {
((UINT8*)(&savereg))[0] = d[len-1];
hfa384x_setreg_noswap(hw, savereg, HFA384x_DATA0);
}
}
}
if (result) {
printf ( "copy_to_bap(%#hx, %#hx, %d) failed, result=%#hx\n", id, offset, len, result);
}
return result;
}
/*
* Request a given record to be copied to/from the record buffer.
*
* Arguments:
* hw device structure
* write [0|1] copy the record buffer to the given
* configuration record. (host order)
* rid RID of the record to read/write. (host order)
*
* Returns:
* 0 success
*/
static inline int hfa384x_cmd_access(hfa384x_t *hw, UINT16 write, UINT16 rid)
{
return hfa384x_docmd_wait(hw, HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_ACCESS) | HFA384x_CMD_WRITE_SET(write), rid, 0, 0);
}
/*
* Performs the sequence necessary to read a config/info item.
*
* Arguments:
* hw device structure
* rid config/info record id (host order)
* buf host side record buffer. Upon return it will
* contain the body portion of the record (minus the
* RID and len).
* len buffer length (in bytes, should match record length)
*
* Returns:
* 0 success
*/
static int hfa384x_drvr_getconfig(hfa384x_t *hw, UINT16 rid, void *buf, UINT16 len)
{
int result = 0;
hfa384x_rec_t rec;
/* Request read of RID */
result = hfa384x_cmd_access( hw, 0, rid);
if ( result ) {
printf("Call to hfa384x_cmd_access failed\n");
return -1;
}
/* Copy out record length */
result = hfa384x_copy_from_bap( hw, rid, 0, &rec, sizeof(rec));
if ( result ) {
return -1;
}
/* Validate the record length */
if ( ((hfa384x2host_16(rec.reclen)-1)*2) != len ) { /* note body len calculation in bytes */
printf ( "RID len mismatch, rid=%#hx hlen=%d fwlen=%d\n", rid, len, (hfa384x2host_16(rec.reclen)-1)*2);
return -1;
}
/* Copy out record data */
result = hfa384x_copy_from_bap( hw, rid, sizeof(rec), buf, len);
return result;
}
/*
* Performs the sequence necessary to read a 16/32 bit config/info item
* and convert it to host order.
*
* Arguments:
* hw device structure
* rid config/info record id (in host order)
* val ptr to 16/32 bit buffer to receive value (in host order)
*
* Returns:
* 0 success
*/
#if 0 /* Not actually used anywhere */
static int hfa384x_drvr_getconfig16(hfa384x_t *hw, UINT16 rid, void *val)
{
int result = 0;
result = hfa384x_drvr_getconfig(hw, rid, val, sizeof(UINT16));
if ( result == 0 ) {
*((UINT16*)val) = hfa384x2host_16(*((UINT16*)val));
}
return result;
}
#endif
#if 0 /* Not actually used anywhere */
static int hfa384x_drvr_getconfig32(hfa384x_t *hw, UINT16 rid, void *val)
{
int result = 0;
result = hfa384x_drvr_getconfig(hw, rid, val, sizeof(UINT32));
if ( result == 0 ) {
*((UINT32*)val) = hfa384x2host_32(*((UINT32*)val));
}
return result;
}
#endif
/*
* Performs the sequence necessary to write a config/info item.
*
* Arguments:
* hw device structure
* rid config/info record id (in host order)
* buf host side record buffer
* len buffer length (in bytes)
*
* Returns:
* 0 success
*/
static int hfa384x_drvr_setconfig(hfa384x_t *hw, UINT16 rid, void *buf, UINT16 len)
{
int result = 0;
hfa384x_rec_t rec;
rec.rid = host2hfa384x_16(rid);
rec.reclen = host2hfa384x_16((len/2) + 1); /* note conversion to words, +1 for rid field */
/* write the record header */
result = hfa384x_copy_to_bap( hw, rid, 0, &rec, sizeof(rec));
if ( result ) {
printf("Failure writing record header\n");
return -1;
}
/* write the record data (if there is any) */
if ( len > 0 ) {
result = hfa384x_copy_to_bap( hw, rid, sizeof(rec), buf, len);
if ( result ) {
printf("Failure writing record data\n");
return -1;
}
}
/* Trigger setting of record */
result = hfa384x_cmd_access( hw, 1, rid);
return result;
}
/*
* Performs the sequence necessary to write a 16/32 bit config/info item.
*
* Arguments:
* hw device structure
* rid config/info record id (in host order)
* val 16/32 bit value to store (in host order)
*
* Returns:
* 0 success
*/
static int hfa384x_drvr_setconfig16(hfa384x_t *hw, UINT16 rid, UINT16 *val)
{
UINT16 value;
value = host2hfa384x_16(*val);
return hfa384x_drvr_setconfig(hw, rid, &value, sizeof(UINT16));
}
#if 0 /* Not actually used anywhere */
static int hfa384x_drvr_setconfig32(hfa384x_t *hw, UINT16 rid, UINT32 *val)
{
UINT32 value;
value = host2hfa384x_32(*val);
return hfa384x_drvr_setconfig(hw, rid, &value, sizeof(UINT32));
}
#endif
/*
* Wait for an event, with specified checking interval and timeout.
* Automatically acknolwedges events.
*
* Arguments:
* hw device structure
* event_mask EVSTAT register mask of events to wait for
* event_ack EVACK register set of events to be acknowledged if they happen (can be
* used to acknowledge "ignorable" events in addition to the "main" event)
* wait Time (in us) to wait between each poll of the register
* timeout Maximum number of polls before timing out
* descr Descriptive text string of what is being waited for
* (will be printed out if a timeout happens)
*
* Returns:
* value of EVSTAT register, or 0 on failure
*/
static int hfa384x_wait_for_event(hfa384x_t *hw, UINT16 event_mask, UINT16 event_ack, int wait, int timeout, const char *descr)
{
UINT16 reg;
int count = 0;
do {
reg = hfa384x_getreg(hw, HFA384x_EVSTAT);
if ( count > 0 ) udelay(wait);
count++;
} while ( !(reg & event_mask) && count < timeout);
if ( count >= timeout ) {
printf("hfa384x: Timed out waiting for %s\n", descr);
return 0; /* Return failure */
}
/* Acknowledge all events that we were waiting on */
hfa384x_setreg(hw, reg & ( event_mask | event_ack ), HFA384x_EVACK);
return reg;
}
/**************************************************************************
POLL - Wait for a frame
***************************************************************************/
static int prism2_poll(struct nic *nic, int retrieve)
{
UINT16 reg;
UINT16 rxfid;
UINT16 result;
hfa384x_rx_frame_t rxdesc;
hfa384x_t *hw = &hw_global;
/* Check for received packet */
reg = hfa384x_getreg(hw, HFA384x_EVSTAT);
if ( ! HFA384x_EVSTAT_ISRX(reg) ) {
/* No packet received - return 0 */
return 0;
}
if ( ! retrieve ) return 1;
/* Acknowledge RX event */
hfa384x_setreg(hw, HFA384x_EVACK_RX_SET(1), HFA384x_EVACK);
/* Get RX FID */
rxfid = hfa384x_getreg(hw, HFA384x_RXFID);
/* Get the descriptor (including headers) */
result = hfa384x_copy_from_bap(hw, rxfid, 0, &rxdesc, sizeof(rxdesc));
if ( result ) {
return 0; /* fail */
}
/* Byte order convert once up front. */
rxdesc.status = hfa384x2host_16(rxdesc.status);
rxdesc.time = hfa384x2host_32(rxdesc.time);
rxdesc.data_len = hfa384x2host_16(rxdesc.data_len);
/* Fill in nic->packetlen */
nic->packetlen = rxdesc.data_len;
if ( nic->packetlen > 0 ) {
/* Fill in nic->packet */
/*
* NOTE: Packets as received have an 8-byte header (LLC+SNAP(?)) terminating with the packet type.
* Etherboot expects a 14-byte header terminating with the packet type (it ignores the rest of the
* header), so we use a quick hack to achieve this.
*/
result = hfa384x_copy_from_bap(hw, rxfid, HFA384x_RX_DATA_OFF,
nic->packet + ETH_HLEN - sizeof(wlan_80211hdr_t), nic->packetlen);
if ( result ) {
return 0; /* fail */
}
}
return 1; /* Packet successfully received */
}
/**************************************************************************
TRANSMIT - Transmit a frame
***************************************************************************/
static void prism2_transmit(
struct nic *nic,
const char *d, /* Destination */
unsigned int t, /* Type */
unsigned int s, /* size */
const char *p) /* Packet */
{
hfa384x_t *hw = &hw_global;
hfa384x_tx_frame_t txdesc;
wlan_80211hdr_t p80211hdr = { wlan_llc_snap, {{0,0,0},0} };
UINT16 fid;
UINT16 status;
int result;
// Request FID allocation
result = hfa384x_docmd_wait(hw, HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_ALLOC), HFA384x_DRVR_TXBUF_MAX, 0, 0);
if (result != 0) {
printf("hfa384x: Tx FID allocate command failed: Aborting transmit..\n");
return;
}
if ( !hfa384x_wait_for_event(hw, HFA384x_EVSTAT_ALLOC, HFA384x_EVACK_INFO, 10, 50, "Tx FID to be allocated\n" ) ) return;
fid = hfa384x_getreg(hw, HFA384x_ALLOCFID);
/* Build Tx frame structure */
memset(&txdesc, 0, sizeof(txdesc));
txdesc.tx_control = host2hfa384x_16( HFA384x_TX_MACPORT_SET(0) | HFA384x_TX_STRUCTYPE_SET(1) |
HFA384x_TX_TXEX_SET(1) | HFA384x_TX_TXOK_SET(1) );
txdesc.frame_control = host2ieee16( WLAN_SET_FC_FTYPE(WLAN_FTYPE_DATA) |
WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_DATAONLY) |
WLAN_SET_FC_TODS(1) );
memcpy(txdesc.address1, hw->bssid, WLAN_ADDR_LEN);
memcpy(txdesc.address2, nic->node_addr, WLAN_ADDR_LEN);
memcpy(txdesc.address3, d, WLAN_ADDR_LEN);
txdesc.data_len = host2hfa384x_16( sizeof(txdesc) + sizeof(p80211hdr) + s );
/* Set up SNAP header */
/* Let OUI default to RFC1042 (0x000000) */
p80211hdr.snap.type = htons(t);
/* Copy txdesc, p80211hdr and payload parts to FID */
result = hfa384x_copy_to_bap(hw, fid, 0, &txdesc, sizeof(txdesc));
if ( result ) return; /* fail */
result = hfa384x_copy_to_bap( hw, fid, sizeof(txdesc), &p80211hdr, sizeof(p80211hdr) );
if ( result ) return; /* fail */
result = hfa384x_copy_to_bap( hw, fid, sizeof(txdesc) + sizeof(p80211hdr), (UINT8*)p, s );
if ( result ) return; /* fail */
/* Issue Tx command */
result = hfa384x_docmd_wait(hw, HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_TX), fid, 0, 0);
if ( result != 0 ) {
printf("hfa384x: Transmit failed with result %#hx.\n", result);
return;
}
/* Wait for transmit completion (or exception) */
result = hfa384x_wait_for_event(hw, HFA384x_EVSTAT_TXEXC | HFA384x_EVSTAT_TX, HFA384x_EVACK_INFO,
200, 500, "Tx to complete\n" );
if ( !result ) return; /* timeout failure */
if ( HFA384x_EVSTAT_ISTXEXC(result) ) {
fid = hfa384x_getreg(hw, HFA384x_TXCOMPLFID);
printf ( "Tx exception occurred with fid %#hx\n", fid );
result = hfa384x_copy_from_bap(hw, fid, 0, &status, sizeof(status));
if ( result ) return; /* fail */
printf("hfa384x: Tx error occurred (status %#hx):\n", status);
if ( HFA384x_TXSTATUS_ISACKERR(status) ) { printf(" ...acknowledgement error\n"); }
if ( HFA384x_TXSTATUS_ISFORMERR(status) ) { printf(" ...format error\n"); }
if ( HFA384x_TXSTATUS_ISDISCON(status) ) { printf(" ...disconnected error\n"); }
if ( HFA384x_TXSTATUS_ISAGEDERR(status) ) { printf(" ...AGED error\n"); }
if ( HFA384x_TXSTATUS_ISRETRYERR(status) ) { printf(" ...retry error\n"); }
return; /* fail */
}
}
/**************************************************************************
DISABLE - Turn off ethernet interface
***************************************************************************/
static void prism2_disable ( struct nic *nic __unused ) {
/* put the card in its initial state */
}
/**************************************************************************
IRQ - Enable, Disable, or Force interrupts
***************************************************************************/
static void prism2_irq(struct nic *nic __unused, irq_action_t action __unused)
{
switch ( action ) {
case DISABLE :
break;
case ENABLE :
break;
case FORCE :
break;
}
}
/**************************************************************************
Operations table
***************************************************************************/
static struct nic_operations prism2_operations = {
.connect = dummy_connect,
.poll = prism2_poll,
.transmit = prism2_transmit,
.irq = prism2_irq,
};
/**************************************************************************
PROBE - Look for an adapter, this routine's visible to the outside
You should omit the last argument struct pci_device * for a non-PCI NIC
***************************************************************************/
static int prism2_probe ( struct nic *nic, hfa384x_t *hw ) {
int result;
UINT16 tmp16 = 0;
UINT16 infofid;
hfa384x_InfFrame_t inf;
char ssid[HFA384x_RID_CNFDESIREDSSID_LEN];
int info_count = 0;
nic->irqno = 0;
/* Initialize card */
result = hfa384x_docmd_wait(hw, HFA384x_CMDCODE_INIT, 0,0,0); /* Send initialize command */
if ( result ) printf ( "Initialize command returned %#hx\n", result );
hfa384x_setreg(hw, 0, HFA384x_INTEN); /* Disable interrupts */
hfa384x_setreg(hw, 0xffff, HFA384x_EVACK); /* Acknowledge any spurious events */
DBG ( "MAC address %s\n", eth_ntoa ( nic->node_addr ) );
/* Retrieve MAC address (and fill out nic->node_addr) */
hfa384x_drvr_getconfig ( hw, HFA384x_RID_CNFOWNMACADDR, nic->node_addr, HFA384x_RID_CNFOWNMACADDR_LEN );
/* Prepare card for autojoin */
/* This procedure is reverse-engineered from a register-level trace of the Linux driver's join process */
tmp16 = WLAN_DATA_MAXLEN; /* Set maximum data length */
result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFMAXDATALEN, &tmp16);
if ( result ) printf ( "Set Max Data Length command returned %#hx\n", result );
tmp16 = 0x000f; /* Set transmit rate(?) */
result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_TXRATECNTL, &tmp16);
if ( result ) printf ( "Set Transmit Rate command returned %#hx\n", result );
tmp16 = HFA384x_CNFAUTHENTICATION_OPENSYSTEM; /* Set authentication type to OpenSystem */
result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFAUTHENTICATION, &tmp16);
if ( result ) printf ( "Set Authentication Type command returned %#hx\n", result );
/* Set SSID */
memset(ssid, 0, HFA384x_RID_CNFDESIREDSSID_LEN);
for ( tmp16=0; tmp16<sizeof(hardcoded_ssid); tmp16++ ) { ssid[2+tmp16] = hardcoded_ssid[tmp16]; }
ssid[0] = sizeof(hardcoded_ssid) - 1; /* Ignore terminating zero */
result = hfa384x_drvr_setconfig(hw, HFA384x_RID_CNFDESIREDSSID, ssid, HFA384x_RID_CNFDESIREDSSID_LEN); /* Set the SSID */
if ( result ) printf ( "Set SSID command returned %#hx\n", result );
tmp16 = 1; /* Set port type to ESS port */
result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFPORTTYPE, &tmp16);
if ( result ) printf ( "Set port type command returned %#hx\n", result );
/* Enable card */
result = hfa384x_docmd_wait(hw, HFA384x_CMD_CMDCODE_SET(HFA384x_CMDCODE_ENABLE) | HFA384x_CMD_MACPORT_SET(0), 0,0,0);
if ( result ) printf ( "Enable command returned %#hx\n", result );
do {
/* Increment info_count, abort if too many attempts.
* See comment next to definition of MAX_JOIN_INFO_COUNT for explanation.
*/
info_count++;
if ( info_count > MAX_JOIN_INFO_COUNT ) {
printf ( "Too many failed attempts - aborting\n" );
return 0;
}
/* Wait for info frame to indicate link status */
if ( sizeof(hardcoded_ssid) == 1 ) {
/* Empty SSID => join to any SSID */
printf ( "Attempting to autojoin to any available access point (attempt %d)...", info_count );
} else {
printf ( "Attempting to autojoin to SSID %s (attempt %d)...", &ssid[2], info_count );
}
if ( !hfa384x_wait_for_event(hw, HFA384x_EVSTAT_INFO, 0, 1000, 2000, "Info event" ) ) return 0;
printf("done\n");
infofid = hfa384x_getreg(hw, HFA384x_INFOFID);
/* Retrieve the length */
result = hfa384x_copy_from_bap( hw, infofid, 0, &inf.framelen, sizeof(UINT16));
if ( result ) return 0; /* fail */
inf.framelen = hfa384x2host_16(inf.framelen);
/* Retrieve the rest */
result = hfa384x_copy_from_bap( hw, infofid, sizeof(UINT16),
&(inf.infotype), inf.framelen * sizeof(UINT16));
if ( result ) return 0; /* fail */
if ( inf.infotype != HFA384x_IT_LINKSTATUS ) {
/* Not a Link Status info frame: die */
printf ( "Unexpected info frame type %#hx (not LinkStatus type)\n", inf.infotype );
return 0;
}
inf.info.linkstatus.linkstatus = hfa384x2host_16(inf.info.linkstatus.linkstatus);
if ( inf.info.linkstatus.linkstatus != HFA384x_LINK_CONNECTED ) {
/* Link not connected - retry */
printf ( "Link not connected (status %#hx)\n", inf.info.linkstatus.linkstatus );
}
} while ( inf.info.linkstatus.linkstatus != HFA384x_LINK_CONNECTED );
/* Retrieve BSSID and print Connected message */
result = hfa384x_drvr_getconfig(hw, HFA384x_RID_CURRENTBSSID, hw->bssid, WLAN_BSSID_LEN);
DBG ( "Link connected (BSSID %s - ", eth_ntoa ( hw->bssid ) );
DBG ( " MAC address %s)\n", eth_ntoa (nic->node_addr ) );
/* point to NIC specific routines */
nic->nic_op = &prism2_operations;
return 1;
}