ref: f40225e86cf4b92cab975d9121ff06ed5cfe9d91
dir: /sys/src/9/pc/etherwpi.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/pci.h"
#include "../port/error.h"
#include "../port/netif.h"
#include "../port/etherif.h"
#include "../port/wifi.h"
enum {
MaxQueue = 24*1024, /* total buffer is 2*MaxQueue: 48k at 22Mbit ≅ 20ms */
Ntxlog = 8,
Ntx = 1<<Ntxlog,
Ntxqmax = MaxQueue/1500,
Nrxlog = 6,
Nrx = 1<<Nrxlog,
Rbufsize = 3*1024,
Rdscsize = 8,
Tdscsize = 64,
Tcmdsize = 128,
};
/* registers */
enum {
Cfg = 0x000,
AlmMb = 1<<8,
AlmMm = 1<<9,
SkuMrc = 1<<10,
RevD = 1<<11,
TypeB = 1<<12,
Isr = 0x008,
Imr = 0x00c,
Ialive = 1<<0,
Iwakeup = 1<<1,
Iswrx = 1<<3,
Irftoggled = 1<<7,
Iswerr = 1<<25,
Ifhtx = 1<<27,
Ihwerr = 1<<29,
Ifhrx = 1<<31,
Ierr = Iswerr | Ihwerr,
Idefmask = Ierr | Ifhtx | Ifhrx | Ialive | Iwakeup | Iswrx | Irftoggled,
FhIsr = 0x010,
GpioIn = 0x018,
Reset = 0x020,
Nevo = 1<<0,
SW = 1<<7,
MasterDisabled = 1<<8,
StopMaster = 1<<9,
Gpc = 0x024,
MacAccessEna = 1<<0,
MacClockReady = 1<<0,
InitDone = 1<<2,
MacAccessReq = 1<<3,
NicSleep = 1<<4,
RfKill = 1<<27,
Eeprom = 0x02c,
EepromGp = 0x030,
UcodeGp1Clr = 0x05c,
UcodeGp1RfKill = 1<<1,
UcodeGp1CmdBlocked = 1<<2,
UcodeGp2 = 0x060,
GioChicken = 0x100,
L1AnoL0Srx = 1<<23,
AnaPll = 0x20c,
Init = 1<<24,
PrphWaddr = 0x444,
PrphRaddr = 0x448,
PrphWdata = 0x44c,
PrphRdata = 0x450,
HbusTargWptr = 0x460,
};
/*
* Flow-Handler registers.
*/
enum {
FhCbbcCtrl = 0x940,
FhCbbcBase = 0x944,
FhRxConfig = 0xc00,
FhRxConfigDmaEna = 1<<31,
FhRxConfigRdrbdEna = 1<<29,
FhRxConfigWrstatusEna = 1<<27,
FhRxConfigMaxfrag = 1<<24,
FhRxConfigIrqDstHost = 1<<12,
FhRxConfigNrdbShift = 20,
FhRxConfigIrqRbthShift = 4,
FhRxBase = 0xc04,
FhRxWptr = 0xc20,
FhRxRptrAddr = 0xc24,
FhRssrTbl = 0xcc0,
FhRxStatus = 0xcc4,
FhTxConfig = 0xd00, // +q*32
FhTxBase = 0xe80,
FhMsgConfig = 0xe88,
FhTxStatus = 0xe90,
};
/*
* NIC internal memory offsets.
*/
enum {
AlmSchedMode = 0x2e00,
AlmSchedArastat = 0x2e04,
AlmSchedTxfact = 0x2e10,
AlmSchedTxf4mf = 0x2e14,
AlmSchedTxf5mf = 0x2e20,
AlmSchedBP1 = 0x2e2c,
AlmSchedBP2 = 0x2e30,
ApmgClkEna = 0x3004,
ApmgClkDis = 0x3008,
DmaClkRqt = 1<<9,
BsmClkRqt = 1<<11,
ApmgPs = 0x300c,
PwrSrcVMain = 0<<24,
PwrSrcMask = 3<<24,
ApmgPciStt = 0x3010,
BsmWrCtrl = 0x3400,
BsmWrMemSrc = 0x3404,
BsmWrMemDst = 0x3408,
BsmWrDwCount = 0x340c,
BsmDramTextAddr = 0x3490,
BsmDramTextSize = 0x3494,
BsmDramDataAddr = 0x3498,
BsmDramDataSize = 0x349c,
BsmSramBase = 0x3800,
};
enum {
FilterPromisc = 1<<0,
FilterCtl = 1<<1,
FilterMulticast = 1<<2,
FilterNoDecrypt = 1<<3,
FilterBSS = 1<<5,
};
enum {
RFlag24Ghz = 1<<0,
RFlagCCK = 1<<1,
RFlagAuto = 1<<2,
RFlagShSlot = 1<<4,
RFlagShPreamble = 1<<5,
RFlagNoDiversity = 1<<7,
RFlagAntennaA = 1<<8,
RFlagAntennaB = 1<<9,
RFlagTSF = 1<<15,
};
typedef struct FWSect FWSect;
typedef struct FWImage FWImage;
typedef struct TXQ TXQ;
typedef struct RXQ RXQ;
typedef struct Shared Shared;
typedef struct Sample Sample;
typedef struct Powergrp Powergrp;
typedef struct Ctlr Ctlr;
struct FWSect
{
uchar *data;
uint size;
};
struct FWImage
{
struct {
FWSect text;
FWSect data;
} init, main, boot;
uint version;
uchar data[];
};
struct TXQ
{
uint n;
uint i;
Block **b;
uchar *d;
uchar *c;
uint lastcmd;
Rendez;
QLock;
};
struct RXQ
{
uint i;
Block **b;
u32int *p;
};
struct Shared
{
u32int txbase[8];
u32int next;
u32int reserved[2];
};
struct Sample
{
uchar index;
char power;
};
struct Powergrp
{
uchar chan;
char maxpwr;
short temp;
Sample samples[5];
};
struct Ctlr {
Lock;
QLock;
Ctlr *link;
uvlong port;
Pcidev *pdev;
Wifi *wifi;
int power;
int active;
int broken;
int attached;
int temp;
u32int ie;
u32int *nic;
/* assigned node ids in hardware node table or -1 if unassigned */
int bcastnodeid;
int bssnodeid;
/* current receiver settings */
uchar bssid[Eaddrlen];
int channel;
int prom;
int aid;
RXQ rx;
TXQ tx[8];
struct {
Rendez;
u32int m;
u32int w;
} wait;
struct {
uchar cap;
u16int rev;
uchar type;
char regdom[4+1];
Powergrp pwrgrps[5];
} eeprom;
char maxpwr[256];
Shared *shared;
FWImage *fw;
};
static void setled(Ctlr *ctlr, int which, int on, int off);
#define csr32r(c, r) (*((c)->nic+((r)/4)))
#define csr32w(c, r, v) (*((c)->nic+((r)/4)) = (v))
static uint
get32(uchar *p){
return *((u32int*)p);
}
static uint
get16(uchar *p)
{
return *((u16int*)p);
}
static void
put32(uchar *p, uint v){
*((u32int*)p) = v;
}
static void
put16(uchar *p, uint v){
*((u16int*)p) = v;
};
static char*
niclock(Ctlr *ctlr)
{
int i;
csr32w(ctlr, Gpc, csr32r(ctlr, Gpc) | MacAccessReq);
for(i=0; i<1000; i++){
if((csr32r(ctlr, Gpc) & (NicSleep | MacAccessEna)) == MacAccessEna)
return 0;
delay(10);
}
return "niclock: timeout";
}
static void
nicunlock(Ctlr *ctlr)
{
csr32w(ctlr, Gpc, csr32r(ctlr, Gpc) & ~MacAccessReq);
}
static u32int
prphread(Ctlr *ctlr, uint off)
{
csr32w(ctlr, PrphRaddr, ((sizeof(u32int)-1)<<24) | off);
coherence();
return csr32r(ctlr, PrphRdata);
}
static void
prphwrite(Ctlr *ctlr, uint off, u32int data)
{
csr32w(ctlr, PrphWaddr, ((sizeof(u32int)-1)<<24) | off);
coherence();
csr32w(ctlr, PrphWdata, data);
}
static char*
eepromread(Ctlr *ctlr, void *data, int count, uint off)
{
uchar *out = data;
char *err;
u32int w = 0;
int i;
if((err = niclock(ctlr)) != nil)
return err;
for(; count > 0; count -= 2, off++){
csr32w(ctlr, Eeprom, off << 2);
csr32w(ctlr, Eeprom, csr32r(ctlr, Eeprom) & ~(1<<1));
for(i = 0; i < 10; i++){
w = csr32r(ctlr, Eeprom);
if(w & 1)
break;
delay(5);
}
if(i == 10)
break;
*out++ = w >> 16;
if(count > 1)
*out++ = w >> 24;
}
nicunlock(ctlr);
if(count > 0)
return "eeprompread: timeout";
return nil;
}
static char*
clockwait(Ctlr *ctlr)
{
int i;
/* Set "initialization complete" bit. */
csr32w(ctlr, Gpc, csr32r(ctlr, Gpc) | InitDone);
for(i=0; i<2500; i++){
if(csr32r(ctlr, Gpc) & MacClockReady)
return nil;
delay(10);
}
return "clockwait: timeout";
}
static char*
poweron(Ctlr *ctlr)
{
char *err;
if(ctlr->power)
return nil;
csr32w(ctlr, AnaPll, csr32r(ctlr, AnaPll) | Init);
/* Disable L0s. */
csr32w(ctlr, GioChicken, csr32r(ctlr, GioChicken) | L1AnoL0Srx);
if((err = clockwait(ctlr)) != nil)
return err;
if((err = niclock(ctlr)) != nil)
return err;
prphwrite(ctlr, ApmgClkEna, DmaClkRqt | BsmClkRqt);
delay(20);
/* Disable L1. */
prphwrite(ctlr, ApmgPciStt, prphread(ctlr, ApmgPciStt) | (1<<11));
nicunlock(ctlr);
ctlr->power = 1;
return nil;
}
static void
poweroff(Ctlr *ctlr)
{
int i, j;
csr32w(ctlr, Reset, Nevo);
/* Disable interrupts. */
csr32w(ctlr, Imr, 0);
csr32w(ctlr, Isr, ~0);
csr32w(ctlr, FhIsr, ~0);
if(niclock(ctlr) == nil){
/* Stop TX scheduler. */
prphwrite(ctlr, AlmSchedMode, 0);
prphwrite(ctlr, AlmSchedTxfact, 0);
/* Stop all DMA channels */
for(i = 0; i < 6; i++){
csr32w(ctlr, FhTxConfig + i*32, 0);
for(j = 0; j < 100; j++){
if((csr32r(ctlr, FhTxStatus) & (0x1010000<<i)) == (0x1010000<<i))
break;
delay(10);
}
}
nicunlock(ctlr);
}
/* Stop RX ring. */
if(niclock(ctlr) == nil){
csr32w(ctlr, FhRxConfig, 0);
for(j = 0; j < 100; j++){
if(csr32r(ctlr, FhRxStatus) & (1<<24))
break;
delay(10);
}
nicunlock(ctlr);
}
if(niclock(ctlr) == nil){
prphwrite(ctlr, ApmgClkDis, DmaClkRqt);
nicunlock(ctlr);
}
delay(5);
csr32w(ctlr, Reset, csr32r(ctlr, Reset) | StopMaster);
if((csr32r(ctlr, Gpc) & (7<<24)) != (4<<24)){
for(j = 0; j < 100; j++){
if(csr32r(ctlr, Reset) & MasterDisabled)
break;
delay(10);
}
}
csr32w(ctlr, Reset, csr32r(ctlr, Reset) | SW);
ctlr->power = 0;
}
static struct {
u32int addr; /* offset in EEPROM */
u8int nchan;
u8int chan[14];
} bands[5] = {
{ 0x63, 14,
{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 } },
{ 0x72, 13,
{ 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16 } },
{ 0x80, 12,
{ 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64 } },
{ 0x8d, 11,
{ 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 } },
{ 0x99, 6,
{ 145, 149, 153, 157, 161, 165 } }
};
static int
wpiinit(Ether *edev)
{
Ctlr *ctlr;
char *err;
uchar b[64];
int i, j;
Powergrp *g;
ctlr = edev->ctlr;
if((err = poweron(ctlr)) != nil)
goto Err;
if((csr32r(ctlr, EepromGp) & 0x6) == 0){
err = "bad rom signature";
goto Err;
}
/* Clear HW ownership of EEPROM. */
csr32w(ctlr, EepromGp, csr32r(ctlr, EepromGp) & ~0x180);
if((err = eepromread(ctlr, b, 1, 0x45)) != nil)
goto Err;
ctlr->eeprom.cap = b[0];
if((err = eepromread(ctlr, b, 2, 0x35)) != nil)
goto Err;
ctlr->eeprom.rev = get16(b);
if((err = eepromread(ctlr, b, 1, 0x4a)) != nil)
goto Err;
ctlr->eeprom.type = b[0];
if((err = eepromread(ctlr, b, 4, 0x60)) != nil)
goto Err;
strncpy(ctlr->eeprom.regdom, (char*)b, 4);
ctlr->eeprom.regdom[4] = '\0';
print("wpi: %X %X %X %s\n", ctlr->eeprom.cap, ctlr->eeprom.rev, ctlr->eeprom.type, ctlr->eeprom.regdom);
if((err = eepromread(ctlr, b, 6, 0x15)) != nil)
goto Err;
memmove(edev->ea, b, Eaddrlen);
memset(ctlr->maxpwr, 0, sizeof(ctlr->maxpwr));
for(i = 0; i < nelem(bands); i++){
if((err = eepromread(ctlr, b, 2*bands[i].nchan, bands[i].addr)) != nil)
goto Err;
for(j = 0; j < bands[i].nchan; j++){
if(!(b[j*2] & 1))
continue;
ctlr->maxpwr[bands[i].chan[j]] = b[j*2+1];
}
}
for(i = 0; i < nelem(ctlr->eeprom.pwrgrps); i++){
if((err = eepromread(ctlr, b, 64, 0x100 + i*32)) != nil)
goto Err;
g = &ctlr->eeprom.pwrgrps[i];
g->maxpwr = b[60];
g->chan = b[61];
g->temp = get16(b+62);
for(j = 0; j < 5; j++){
g->samples[j].index = b[j*4];
g->samples[j].power = b[j*4+1];
}
}
poweroff(ctlr);
return 0;
Err:
print("wpiinit: %s\n", err);
poweroff(ctlr);
return -1;
}
static char*
crackfw(FWImage *i, uchar *data, uint size)
{
uchar *p, *e;
memset(i, 0, sizeof(*i));
if(size < 4*6){
Tooshort:
return "firmware image too short";
}
p = data;
e = p + size;
i->version = get32(p); p += 4;
i->main.text.size = get32(p); p += 4;
i->main.data.size = get32(p); p += 4;
i->init.text.size = get32(p); p += 4;
i->init.data.size = get32(p); p += 4;
i->boot.text.size = get32(p); p += 4;
i->main.text.data = p; p += i->main.text.size;
i->main.data.data = p; p += i->main.data.size;
i->init.text.data = p; p += i->init.text.size;
i->init.data.data = p; p += i->init.data.size;
i->boot.text.data = p; p += i->boot.text.size;
if(p > e)
goto Tooshort;
return nil;
}
static FWImage*
readfirmware(void)
{
uchar dirbuf[sizeof(Dir)+100], *data;
char *err;
FWImage *fw;
int n, r;
Chan *c;
Dir d;
if(!iseve())
error(Eperm);
if(!waserror()){
c = namec("/boot/wpi-3945abg", Aopen, OREAD, 0);
poperror();
}else
c = namec("/lib/firmware/wpi-3945abg", Aopen, OREAD, 0);
if(waserror()){
cclose(c);
nexterror();
}
n = devtab[c->type]->stat(c, dirbuf, sizeof dirbuf);
if(n <= 0)
error("can't stat firmware");
convM2D(dirbuf, n, &d, nil);
fw = smalloc(sizeof(*fw) + 16 + d.length);
data = (uchar*)(fw+1);
if(waserror()){
free(fw);
nexterror();
}
r = 0;
while(r < d.length){
n = devtab[c->type]->read(c, data+r, d.length-r, (vlong)r);
if(n <= 0)
break;
r += n;
}
if((err = crackfw(fw, data, r)) != nil)
error(err);
poperror();
poperror();
cclose(c);
return fw;
}
static int
gotirq(void *arg)
{
Ctlr *ctlr = arg;
return (ctlr->wait.m & ctlr->wait.w) != 0;
}
static u32int
irqwait(Ctlr *ctlr, u32int mask, int timeout)
{
u32int r;
ilock(ctlr);
r = ctlr->wait.m & mask;
if(r == 0){
ctlr->wait.w = mask;
iunlock(ctlr);
if(!waserror()){
tsleep(&ctlr->wait, gotirq, ctlr, timeout);
poperror();
}
ilock(ctlr);
ctlr->wait.w = 0;
r = ctlr->wait.m & mask;
}
ctlr->wait.m &= ~r;
iunlock(ctlr);
return r;
}
static int
rbplant(Ctlr *ctlr, int i)
{
Block *b;
b = iallocb(Rbufsize+127);
if(b == nil)
return -1;
b->rp = b->wp = (uchar*)((((uintptr)b->base+127)&~127));
memset(b->rp, 0, Rdscsize);
coherence();
ctlr->rx.b[i] = b;
ctlr->rx.p[i] = PCIWADDR(b->rp);
return 0;
}
static char*
initring(Ctlr *ctlr)
{
RXQ *rx;
TXQ *tx;
int i, q;
rx = &ctlr->rx;
if(rx->b == nil)
rx->b = malloc(sizeof(Block*) * Nrx);
if(rx->p == nil)
rx->p = mallocalign(sizeof(u32int) * Nrx, 16 * 1024, 0, 0);
if(rx->b == nil || rx->p == nil)
return "no memory for rx ring";
for(i = 0; i<Nrx; i++){
rx->p[i] = 0;
if(rx->b[i] != nil){
freeb(rx->b[i]);
rx->b[i] = nil;
}
if(rbplant(ctlr, i) < 0)
return "no memory for rx descriptors";
}
rx->i = 0;
if(ctlr->shared == nil)
ctlr->shared = mallocalign(4096, 4096, 0, 0);
if(ctlr->shared == nil)
return "no memory for shared buffer";
memset(ctlr->shared, 0, 4096);
for(q=0; q<nelem(ctlr->tx); q++){
tx = &ctlr->tx[q];
if(tx->b == nil)
tx->b = malloc(sizeof(Block*) * Ntx);
if(tx->d == nil)
tx->d = mallocalign(Tdscsize * Ntx, 16 * 1024, 0, 0);
if(tx->c == nil)
tx->c = mallocalign(Tcmdsize * Ntx, 4, 0, 0);
if(tx->b == nil || tx->d == nil || tx->c == nil)
return "no memory for tx ring";
memset(tx->d, 0, Tdscsize * Ntx);
memset(tx->c, 0, Tcmdsize * Ntx);
for(i=0; i<Ntx; i++){
if(tx->b[i] != nil){
freeb(tx->b[i]);
tx->b[i] = nil;
}
}
ctlr->shared->txbase[q] = PCIWADDR(tx->d);
tx->i = 0;
tx->n = 0;
tx->lastcmd = 0;
}
return nil;
}
static char*
reset(Ctlr *ctlr)
{
uchar rev;
char *err;
int i;
if(ctlr->power)
poweroff(ctlr);
if((err = initring(ctlr)) != nil)
return err;
if((err = poweron(ctlr)) != nil)
return err;
/* Select VMAIN power source. */
if((err = niclock(ctlr)) != nil)
return err;
prphwrite(ctlr, ApmgPs, (prphread(ctlr, ApmgPs) & ~PwrSrcMask) | PwrSrcVMain);
nicunlock(ctlr);
/* Spin until VMAIN gets selected. */
for(i = 0; i < 5000; i++){
if(csr32r(ctlr, GpioIn) & (1 << 9))
break;
delay(10);
}
/* Perform adapter initialization. */
rev = ctlr->pdev->rid;
if((rev & 0xc0) == 0x40)
csr32w(ctlr, Cfg, csr32r(ctlr, Cfg) | AlmMb);
else if(!(rev & 0x80))
csr32w(ctlr, Cfg, csr32r(ctlr, Cfg) | AlmMm);
if(ctlr->eeprom.cap == 0x80)
csr32w(ctlr, Cfg, csr32r(ctlr, Cfg) | SkuMrc);
if((ctlr->eeprom.rev & 0xf0) == 0xd0)
csr32w(ctlr, Cfg, csr32r(ctlr, Cfg) | RevD);
else
csr32w(ctlr, Cfg, csr32r(ctlr, Cfg) & ~RevD);
if(ctlr->eeprom.type > 1)
csr32w(ctlr, Cfg, csr32r(ctlr, Cfg) | TypeB);
/* Initialize RX ring. */
if((err = niclock(ctlr)) != nil)
return err;
coherence();
csr32w(ctlr, FhRxBase, PCIWADDR(ctlr->rx.p));
csr32w(ctlr, FhRxRptrAddr, PCIWADDR(&ctlr->shared->next));
csr32w(ctlr, FhRxWptr, 0);
csr32w(ctlr, FhRxConfig,
FhRxConfigDmaEna |
FhRxConfigRdrbdEna |
FhRxConfigWrstatusEna |
FhRxConfigMaxfrag |
(Nrxlog << FhRxConfigNrdbShift) |
FhRxConfigIrqDstHost |
(1 << FhRxConfigIrqRbthShift));
USED(csr32r(ctlr, FhRssrTbl));
csr32w(ctlr, FhRxWptr, (Nrx-1) & ~7);
nicunlock(ctlr);
/* Initialize TX rings. */
if((err = niclock(ctlr)) != nil)
return err;
prphwrite(ctlr, AlmSchedMode, 2);
prphwrite(ctlr, AlmSchedArastat, 1);
prphwrite(ctlr, AlmSchedTxfact, 0x3f);
prphwrite(ctlr, AlmSchedBP1, 0x10000);
prphwrite(ctlr, AlmSchedBP2, 0x30002);
prphwrite(ctlr, AlmSchedTxf4mf, 4);
prphwrite(ctlr, AlmSchedTxf5mf, 5);
csr32w(ctlr, FhTxBase, PCIWADDR(ctlr->shared));
csr32w(ctlr, FhMsgConfig, 0xffff05a5);
for(i = 0; i < 6; i++){
csr32w(ctlr, FhCbbcCtrl+i*8, 0);
csr32w(ctlr, FhCbbcBase+i*8, 0);
csr32w(ctlr, FhTxConfig+i*32, 0x80200008);
}
nicunlock(ctlr);
USED(csr32r(ctlr, FhTxBase));
csr32w(ctlr, UcodeGp1Clr, UcodeGp1RfKill);
csr32w(ctlr, UcodeGp1Clr, UcodeGp1CmdBlocked);
ctlr->broken = 0;
ctlr->wait.m = 0;
ctlr->wait.w = 0;
ctlr->ie = Idefmask;
csr32w(ctlr, Imr, ctlr->ie);
csr32w(ctlr, Isr, ~0);
csr32w(ctlr, UcodeGp1Clr, UcodeGp1RfKill);
csr32w(ctlr, UcodeGp1Clr, UcodeGp1RfKill);
return nil;
}
static char*
postboot(Ctlr *);
static char*
boot(Ctlr *ctlr)
{
int i, n, size;
uchar *dma, *p;
FWImage *fw;
char *err;
fw = ctlr->fw;
/* 16 byte padding may not be necessary. */
size = ROUND(fw->init.data.size, 16) + ROUND(fw->init.text.size, 16);
dma = mallocalign(size, 16, 0, 0);
if(dma == nil)
return "no memory for dma";
if((err = niclock(ctlr)) != nil){
free(dma);
return err;
}
p = dma;
memmove(p, fw->init.data.data, fw->init.data.size);
coherence();
prphwrite(ctlr, BsmDramDataAddr, PCIWADDR(p));
prphwrite(ctlr, BsmDramDataSize, fw->init.data.size);
p += ROUND(fw->init.data.size, 16);
memmove(p, fw->init.text.data, fw->init.text.size);
coherence();
prphwrite(ctlr, BsmDramTextAddr, PCIWADDR(p));
prphwrite(ctlr, BsmDramTextSize, fw->init.text.size);
nicunlock(ctlr);
if((err = niclock(ctlr)) != nil){
free(dma);
return err;
}
/* Copy microcode image into NIC memory. */
p = fw->boot.text.data;
n = fw->boot.text.size/4;
for(i=0; i<n; i++, p += 4)
prphwrite(ctlr, BsmSramBase+i*4, get32(p));
prphwrite(ctlr, BsmWrMemSrc, 0);
prphwrite(ctlr, BsmWrMemDst, 0);
prphwrite(ctlr, BsmWrDwCount, n);
/* Start boot load now. */
prphwrite(ctlr, BsmWrCtrl, 1<<31);
/* Wait for transfer to complete. */
for(i=0; i<1000; i++){
if((prphread(ctlr, BsmWrCtrl) & (1<<31)) == 0)
break;
delay(10);
}
if(i == 1000){
nicunlock(ctlr);
free(dma);
return "bootcode timeout";
}
/* Enable boot after power up. */
prphwrite(ctlr, BsmWrCtrl, 1<<30);
nicunlock(ctlr);
/* Now press "execute". */
csr32w(ctlr, Reset, 0);
/* Wait at most one second for first alive notification. */
if(irqwait(ctlr, Ierr|Ialive, 5000) != Ialive){
free(dma);
return "init firmware boot failed";
}
free(dma);
size = ROUND(fw->main.data.size, 16) + ROUND(fw->main.text.size, 16);
dma = mallocalign(size, 16, 0, 0);
if(dma == nil)
return "no memory for dma";
if((err = niclock(ctlr)) != nil){
free(dma);
return err;
}
p = dma;
memmove(p, fw->main.data.data, fw->main.data.size);
coherence();
prphwrite(ctlr, BsmDramDataAddr, PCIWADDR(p));
prphwrite(ctlr, BsmDramDataSize, fw->main.data.size);
p += ROUND(fw->main.data.size, 16);
memmove(p, fw->main.text.data, fw->main.text.size);
coherence();
prphwrite(ctlr, BsmDramTextAddr, PCIWADDR(p));
prphwrite(ctlr, BsmDramTextSize, fw->main.text.size | (1<<31));
nicunlock(ctlr);
if(irqwait(ctlr, Ierr|Ialive, 5000) != Ialive){
free(dma);
return "main firmware boot failed";
}
free(dma);
return postboot(ctlr);
}
static int
txqready(void *arg)
{
TXQ *q = arg;
return q->n < Ntxqmax;
}
static char*
qcmd(Ctlr *ctlr, uint qid, uint code, uchar *data, int size, Block *block)
{
uchar *d, *c;
int pad;
TXQ *q;
assert(qid < nelem(ctlr->tx));
assert(size <= Tcmdsize-4);
ilock(ctlr);
q = &ctlr->tx[qid];
while(q->n >= Ntxqmax && !ctlr->broken){
iunlock(ctlr);
qlock(q);
if(!waserror()){
tsleep(q, txqready, q, 5);
poperror();
}
qunlock(q);
ilock(ctlr);
}
if(ctlr->broken){
iunlock(ctlr);
return "qcmd: broken";
}
q->n++;
q->lastcmd = code;
q->b[q->i] = block;
c = q->c + q->i * Tcmdsize;
d = q->d + q->i * Tdscsize;
/* build command */
c[0] = code;
c[1] = 0; /* flags */
c[2] = q->i;
c[3] = qid;
if(size > 0)
memmove(c+4, data, size);
size += 4;
memset(d, 0, Tdscsize);
pad = size - 4;
if(block != nil)
pad += BLEN(block);
pad = ((pad + 3) & ~3) - pad;
put32(d, (pad << 28) | ((1 + (block != nil)) << 24)), d += 4;
put32(d, PCIWADDR(c)), d += 4;
put32(d, size), d += 4;
if(block != nil){
size = BLEN(block);
put32(d, PCIWADDR(block->rp)), d += 4;
put32(d, size), d += 4;
}
USED(d);
coherence();
q->i = (q->i+1) % Ntx;
csr32w(ctlr, HbusTargWptr, (qid<<8) | q->i);
iunlock(ctlr);
return nil;
}
static int
txqempty(void *arg)
{
TXQ *q = arg;
return q->n == 0;
}
static char*
flushq(Ctlr *ctlr, uint qid)
{
TXQ *q;
int i;
q = &ctlr->tx[qid];
qlock(q);
for(i = 0; i < 200 && !ctlr->broken; i++){
if(txqempty(q)){
qunlock(q);
return nil;
}
if(islo() && !waserror()){
tsleep(q, txqempty, q, 10);
poperror();
}
}
qunlock(q);
if(ctlr->broken)
return "flushq: broken";
return "flushq: timeout";
}
static char*
cmd(Ctlr *ctlr, uint code, uchar *data, int size)
{
char *err;
if((err = qcmd(ctlr, 4, code, data, size, nil)) != nil)
return err;
return flushq(ctlr, 4);
}
static void
setled(Ctlr *ctlr, int which, int on, int off)
{
uchar c[8];
memset(c, 0, sizeof(c));
put32(c, 10000);
c[4] = which;
c[5] = on;
c[6] = off;
cmd(ctlr, 72, c, sizeof(c));
}
static char*
btcoex(Ctlr *ctlr)
{
uchar c[Tcmdsize], *p;
/* configure bluetooth coexistance. */
p = c;
*p++ = 3; /* flags WPI_BT_COEX_MODE_4WIRE */
*p++ = 30; /* lead time */
*p++ = 5; /* max kill */
*p++ = 0; /* reserved */
put32(p, 0), p += 4; /* kill_ack */
put32(p, 0), p += 4; /* kill_cts */
return cmd(ctlr, 155, c, p-c);
}
static char*
powermode(Ctlr *ctlr)
{
uchar c[Tcmdsize];
int capoff, reg;
memset(c, 0, sizeof(c));
capoff = pcicap(ctlr->pdev, PciCapPCIe);
if(capoff >= 0){
reg = pcicfgr8(ctlr->pdev, capoff+1);
if((reg & 1) == 0) /* PCI_PCIE_LCR_ASPM_L0S */
c[0] |= 1<<3; /* WPI_PS_PCI_PMGT */
}
return cmd(ctlr, 119, c, 4*(3+5));
}
static char*
postboot(Ctlr *ctlr)
{
while((ctlr->temp = (int)csr32r(ctlr, UcodeGp2)) == 0)
delay(10);
if(0){
char *err;
if((err = btcoex(ctlr)) != nil)
print("btcoex: %s\n", err);
if((err = powermode(ctlr)) != nil)
print("powermode: %s\n", err);
}
return nil;
}
static uchar wpirates[] = {
0x80 | 12,
0x80 | 18,
0x80 | 24,
0x80 | 36,
0x80 | 48,
0x80 | 72,
0x80 | 96,
0x80 | 108,
0x80 | 2,
0x80 | 4,
0x80 | 11,
0x80 | 22,
0
};
static struct {
uchar rate;
uchar plcp;
} ratetab[] = {
{ 12, 0xd },
{ 18, 0xf },
{ 24, 0x5 },
{ 36, 0x7 },
{ 48, 0x9 },
{ 72, 0xb },
{ 96, 0x1 },
{ 108, 0x3 },
{ 2, 10 },
{ 4, 20 },
{ 11, 55 },
{ 22, 110 },
};
static u8int rfgain_2ghz[] = {
0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xbb, 0xbb, 0xbb,
0xbb, 0xf3, 0xf3, 0xf3, 0xf3, 0xf3, 0xd3, 0xd3, 0xb3, 0xb3, 0xb3,
0x93, 0x93, 0x93, 0x93, 0x93, 0x93, 0x93, 0x73, 0xeb, 0xeb, 0xeb,
0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xab, 0xab, 0xab, 0x8b,
0xe3, 0xe3, 0xe3, 0xe3, 0xe3, 0xe3, 0xc3, 0xc3, 0xc3, 0xc3, 0xa3,
0xa3, 0xa3, 0xa3, 0x83, 0x83, 0x83, 0x83, 0x63, 0x63, 0x63, 0x63,
0x43, 0x43, 0x43, 0x43, 0x23, 0x23, 0x23, 0x23, 0x03, 0x03, 0x03,
0x03
};
static u8int dspgain_2ghz[] = {
0x7f, 0x7f, 0x7f, 0x7f, 0x7d, 0x6e, 0x69, 0x62, 0x7d, 0x73, 0x6c,
0x63, 0x77, 0x6f, 0x69, 0x61, 0x5c, 0x6a, 0x64, 0x78, 0x71, 0x6b,
0x7d, 0x77, 0x70, 0x6a, 0x65, 0x61, 0x5b, 0x6b, 0x79, 0x73, 0x6d,
0x7f, 0x79, 0x73, 0x6c, 0x66, 0x60, 0x5c, 0x6e, 0x68, 0x62, 0x74,
0x7d, 0x77, 0x71, 0x6b, 0x65, 0x60, 0x71, 0x6a, 0x66, 0x5f, 0x71,
0x6a, 0x66, 0x5f, 0x71, 0x6a, 0x66, 0x5f, 0x71, 0x6a, 0x66, 0x5f,
0x71, 0x6a, 0x66, 0x5f, 0x71, 0x6a, 0x66, 0x5f, 0x71, 0x6a, 0x66,
0x5f
};
static int
pwridx(Ctlr *ctlr, Powergrp *pwgr, int chan, int rate)
{
/* Fixed-point arithmetic division using a n-bit fractional part. */
#define fdivround(a, b, n) \
((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n))
/* Linear interpolation. */
#define interpolate(x, x1, y1, x2, y2, n) \
((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n))
int pwr;
Sample *sample;
int idx;
/* Default TX power is group maximum TX power minus 3dB. */
pwr = pwgr->maxpwr / 2;
/* Decrease TX power for highest OFDM rates to reduce distortion. */
switch(rate){
case 5: /* WPI_RIDX_OFDM36 */
pwr -= 0;
break;
case 6: /* WPI_RIDX_OFDM48 */
pwr -=7;
break;
case 7: /* WPI_RIDX_OFDM54 */
pwr -= 9;
break;
}
/* Never exceed the channel maximum allowed TX power. */
pwr = MIN(pwr, ctlr->maxpwr[chan]);
/* Retrieve TX power index into gain tables from samples. */
for(sample = pwgr->samples; sample < &pwgr->samples[3]; sample++)
if(pwr > sample[1].power)
break;
/* Fixed-point linear interpolation using a 19-bit fractional part. */
idx = interpolate(pwr, sample[0].power, sample[0].index,
sample[1].power, sample[1].index, 19);
/*-
* Adjust power index based on current temperature:
* - if cooler than factory-calibrated: decrease output power
* - if warmer than factory-calibrated: increase output power
*/
idx -= (ctlr->temp - pwgr->temp) * 11 / 100;
/* Decrease TX power for CCK rates (-5dB). */
if (rate >= 8)
idx += 10;
/* Make sure idx stays in a valid range. */
if (idx < 0)
idx = 0;
else if (idx >= nelem(rfgain_2ghz))
idx = nelem(rfgain_2ghz)-1;
return idx;
#undef fdivround
#undef interpolate
}
static void
addnode(Ctlr *ctlr, uchar id, uchar *addr, int plcp, int antenna)
{
uchar c[Tcmdsize], *p;
memset(p = c, 0, sizeof(c));
*p++ = 0; /* control (1 = update) */
p += 3; /* reserved */
memmove(p, addr, 6);
p += 6;
p += 2; /* reserved */
*p++ = id; /* node id */
p++; /* flags */
p += 2; /* reserved */
p += 2; /* kflags */
p++; /* tcs2 */
p++; /* reserved */
p += 5*2; /* ttak */
p += 2; /* reserved */
p += 16; /* key */
put32(p, 4); /* action (4 = set_rate) */
p += 4;
p += 4; /* mask */
p += 2; /* tid */
*p++ = plcp; /* plcp */
*p++ = antenna; /* antenna */
p++; /* add_imm */
p++; /* del_imm */
p++; /* add_imm_start */
cmd(ctlr, 24, c, p - c);
}
static void
rxon(Ether *edev, Wnode *bss)
{
uchar c[Tcmdsize], *p;
int filter, flags, rate;
Ctlr *ctlr;
char *err;
int idx;
ctlr = edev->ctlr;
filter = FilterNoDecrypt | FilterMulticast;
if(ctlr->prom){
filter |= FilterPromisc;
if(bss != nil)
ctlr->channel = bss->channel;
bss = nil;
}
flags = RFlagTSF | RFlag24Ghz | RFlagAuto;
if(bss != nil){
if(bss->cap & (1<<5))
flags |= RFlagShPreamble;
if(bss->cap & (1<<10))
flags |= RFlagShSlot;
ctlr->channel = bss->channel;
memmove(ctlr->bssid, bss->bssid, Eaddrlen);
ctlr->aid = bss->aid;
if(ctlr->aid != 0){
filter |= FilterBSS;
ctlr->bssnodeid = -1;
}else
ctlr->bcastnodeid = -1;
}else{
memmove(ctlr->bssid, edev->bcast, Eaddrlen);
ctlr->aid = 0;
ctlr->bcastnodeid = -1;
ctlr->bssnodeid = -1;
}
if(ctlr->aid != 0)
setled(ctlr, 2, 0, 1); /* on when associated */
else if(memcmp(ctlr->bssid, edev->bcast, Eaddrlen) != 0)
setled(ctlr, 2, 10, 10); /* slow blink when connecting */
else
setled(ctlr, 2, 5, 5); /* fast blink when scanning */
memset(p = c, 0, sizeof(c));
memmove(p, edev->ea, 6); p += 8; /* myaddr */
memmove(p, ctlr->bssid, 6); p += 16; /* bssid */
*p++ = 3; /* mode (STA) */
p += 3;
*p++ = 0xff; /* ofdm mask (not yet negotiated) */
*p++ = 0x0f; /* cck mask (not yet negotiated) */
put16(p, ctlr->aid & 0x3fff); /* associd */
p += 2;
put32(p, flags);
p += 4;
put32(p, filter);
p += 4;
*p++ = ctlr->channel;
p += 3;
if((err = cmd(ctlr, 16, c, p - c)) != nil){
print("rxon: %s\n", err);
return;
}
if(ctlr->maxpwr[ctlr->channel] != 0){
/* tx power */
memset(p = c, 0, sizeof(c));
*p++ = 1; /* band (0 = 5ghz) */
p++; /* reserved */
put16(p, ctlr->channel), p += 2;
for(rate = 0; rate < nelem(ratetab); rate++){
idx = pwridx(ctlr, &ctlr->eeprom.pwrgrps[0], ctlr->channel, rate);
*p++ = ratetab[rate].plcp;
*p++ = rfgain_2ghz[idx]; /* rf_gain */
*p++ = dspgain_2ghz[idx]; /* dsp_gain */
p++; /* reservd */
}
cmd(ctlr, 151, c, p - c);
}
if(ctlr->bcastnodeid == -1){
ctlr->bcastnodeid = 24;
addnode(ctlr, ctlr->bcastnodeid, edev->bcast, ratetab[0].plcp, 3<<6);
}
if(ctlr->bssnodeid == -1 && bss != nil && ctlr->aid != 0){
ctlr->bssnodeid = 0;
addnode(ctlr, ctlr->bssnodeid, bss->bssid, ratetab[0].plcp, 3<<6);
}
}
enum {
TFlagNeedRTS = 1<<1,
TFlagNeedCTS = 1<<2,
TFlagNeedACK = 1<<3,
TFlagFullTxOp = 1<<7,
TFlagBtDis = 1<<12,
TFlagAutoSeq = 1<<13,
TFlagInsertTs = 1<<16,
};
static void
transmit(Wifi *wifi, Wnode *wn, Block *b)
{
uchar c[Tcmdsize], *p;
Ether *edev;
Ctlr *ctlr;
Wifipkt *w;
int flags, nodeid, rate, timeout;
char *err;
edev = wifi->ether;
ctlr = edev->ctlr;
qlock(ctlr);
if(ctlr->attached == 0 || ctlr->broken){
qunlock(ctlr);
freeb(b);
return;
}
if((wn->channel != ctlr->channel)
|| (!ctlr->prom && (wn->aid != ctlr->aid || memcmp(wn->bssid, ctlr->bssid, Eaddrlen) != 0)))
rxon(edev, wn);
if(b == nil){
/* association note has no data to transmit */
qunlock(ctlr);
return;
}
flags = 0;
timeout = 3;
nodeid = ctlr->bcastnodeid;
p = wn->minrate;
w = (Wifipkt*)b->rp;
if((w->a1[0] & 1) == 0){
flags |= TFlagNeedACK;
if(BLEN(b) > 512-4)
flags |= TFlagNeedRTS|TFlagFullTxOp;
if((w->fc[0] & 0x0c) == 0x08 && ctlr->bssnodeid != -1){
timeout = 0;
nodeid = ctlr->bssnodeid;
p = wn->actrate;
}
}
if(p >= wifi->rates)
rate = p - wifi->rates;
else
rate = 0;
qunlock(ctlr);
memset(p = c, 0, sizeof(c));
put16(p, BLEN(b)), p += 2;
put16(p, 0), p += 2; /* lnext */
put32(p, flags), p += 4;
*p++ = ratetab[rate].plcp;
*p++ = nodeid;
*p++ = 0; /* tid */
*p++ = 0; /* security */
p += 16+8; /* key/iv */
put32(p, 0), p += 4; /* fnext */
put32(p, 0xffffffff), p += 4; /* livetime infinite */
*p++ = 0xff;
*p++ = 0x0f;
*p++ = 7;
*p++ = 15;
put16(p, timeout), p += 2;
put16(p, 0), p += 2; /* txop */
if((err = qcmd(ctlr, 0, 28, c, p - c, b)) != nil){
print("transmit: %s\n", err);
freeb(b);
}
}
static long
wpictl(Ether *edev, void *buf, long n)
{
Ctlr *ctlr;
ctlr = edev->ctlr;
if(n >= 5 && memcmp(buf, "reset", 5) == 0){
ctlr->broken = 1;
return n;
}
if(ctlr->wifi)
return wifictl(ctlr->wifi, buf, n);
return 0;
}
static long
wpiifstat(Ether *edev, void *buf, long n, ulong off)
{
Ctlr *ctlr;
ctlr = edev->ctlr;
if(ctlr->wifi)
return wifistat(ctlr->wifi, buf, n, off);
return 0;
}
static void
setoptions(Ether *edev)
{
Ctlr *ctlr;
int i;
ctlr = edev->ctlr;
for(i = 0; i < edev->nopt; i++)
wificfg(ctlr->wifi, edev->opt[i]);
}
static void
wpipromiscuous(void *arg, int on)
{
Ether *edev;
Ctlr *ctlr;
edev = arg;
ctlr = edev->ctlr;
qlock(ctlr);
ctlr->prom = on;
rxon(edev, ctlr->wifi->bss);
qunlock(ctlr);
}
static void
wpimulticast(void *, uchar*, int)
{
}
static void
wpirecover(void *arg)
{
Ether *edev;
Ctlr *ctlr;
edev = arg;
ctlr = edev->ctlr;
while(waserror())
;
for(;;){
tsleep(&up->sleep, return0, 0, 4000);
qlock(ctlr);
for(;;){
if(ctlr->broken == 0)
break;
if(ctlr->power)
poweroff(ctlr);
if((csr32r(ctlr, Gpc) & RfKill) == 0)
break;
if(reset(ctlr) != nil)
break;
if(boot(ctlr) != nil)
break;
ctlr->bcastnodeid = -1;
ctlr->bssnodeid = -1;
ctlr->aid = 0;
rxon(edev, ctlr->wifi->bss);
break;
}
qunlock(ctlr);
}
}
static void
wpiattach(Ether *edev)
{
FWImage *fw;
Ctlr *ctlr;
char *err;
ctlr = edev->ctlr;
eqlock(ctlr);
if(waserror()){
print("#l%d: %s\n", edev->ctlrno, up->errstr);
if(ctlr->power)
poweroff(ctlr);
qunlock(ctlr);
nexterror();
}
if(ctlr->attached == 0){
if((csr32r(ctlr, Gpc) & RfKill) == 0)
error("wifi disabled by switch");
if(ctlr->wifi == nil){
qsetlimit(edev->oq, MaxQueue);
ctlr->wifi = wifiattach(edev, transmit);
ctlr->wifi->rates = wpirates;
}
if(ctlr->fw == nil){
fw = readfirmware();
print("#l%d: firmware: %ux, size: %ux+%ux+%ux+%ux+%ux\n",
edev->ctlrno, fw->version,
fw->main.text.size, fw->main.data.size,
fw->init.text.size, fw->init.data.size,
fw->boot.text.size);
ctlr->fw = fw;
}
if((err = reset(ctlr)) != nil)
error(err);
if((err = boot(ctlr)) != nil)
error(err);
ctlr->bcastnodeid = -1;
ctlr->bssnodeid = -1;
ctlr->channel = 1;
ctlr->aid = 0;
setoptions(edev);
ctlr->attached = 1;
kproc("wpirecover", wpirecover, edev);
}
qunlock(ctlr);
poperror();
}
static void
receive(Ctlr *ctlr)
{
Block *b, *bb;
uchar *d;
RXQ *rx;
TXQ *tx;
u32int hw;
rx = &ctlr->rx;
if(ctlr->broken || ctlr->shared == nil || rx->b == nil)
return;
bb = nil;
for(hw = ctlr->shared->next % Nrx; rx->i != hw; rx->i = (rx->i + 1) % Nrx){
uchar type, flags, idx, qid;
u32int len;
b = rx->b[rx->i];
if(b == nil)
continue;
d = b->rp;
len = get32(d); d += 4;
type = *d++;
flags = *d++;
idx = *d++;
qid = *d++;
USED(len);
USED(flags);
if(0) iprint("rxdesc[%d] type=%d len=%d idx=%d qid=%d\n", rx->i, type, len, idx, qid);
if(bb != nil){
freeb(bb);
bb = nil;
}
if((qid & 0x80) == 0 && qid < nelem(ctlr->tx)){
tx = &ctlr->tx[qid];
if(tx->n > 0){
bb = tx->b[idx];
tx->b[idx] = nil;
tx->n--;
wakeup(tx);
}
}
switch(type){
case 1: /* uc ready */
break;
case 24: /* add node done */
break;
case 27: /* rx done */
if(d + 1 > b->lim)
break;
d += d[0];
d += 8;
if(d + 6 + 2 > b->lim){
break;
}
len = get16(d+6);
d += 8;
if(d + len + 4 > b->lim){
break;
}
if((get32(d + len) & 3) != 3){
break;
}
if(ctlr->wifi == nil)
break;
if(rbplant(ctlr, rx->i) < 0)
break;
b->rp = d;
b->wp = d + len;
wifiiq(ctlr->wifi, b);
continue;
case 28: /* tx done */
if(len <= 8 || d[8] == 1)
break;
wifitxfail(ctlr->wifi, bb);
break;
case 130: /* start scan */
break;
case 132: /* stop scan */
break;
case 161: /* state change */
break;
}
}
csr32w(ctlr, FhRxWptr, ((hw+Nrx-1) % Nrx) & ~7);
if(bb != nil)
freeb(bb);
}
static void
wpiinterrupt(Ureg*, void *arg)
{
u32int isr, fhisr;
Ether *edev;
Ctlr *ctlr;
edev = arg;
ctlr = edev->ctlr;
ilock(ctlr);
csr32w(ctlr, Imr, 0);
isr = csr32r(ctlr, Isr);
fhisr = csr32r(ctlr, FhIsr);
if(isr == 0xffffffff || (isr & 0xfffffff0) == 0xa5a5a5a0){
iunlock(ctlr);
return;
}
if(isr == 0 && fhisr == 0)
goto done;
csr32w(ctlr, Isr, isr);
csr32w(ctlr, FhIsr, fhisr);
if((isr & (Iswrx | Ifhrx)) || (fhisr & Ifhrx))
receive(ctlr);
if(isr & Ierr){
ctlr->broken = 1;
iprint("#l%d: fatal firmware error, lastcmd %ud\n", edev->ctlrno, ctlr->tx[4].lastcmd);
}
ctlr->wait.m |= isr;
if(ctlr->wait.m & ctlr->wait.w)
wakeup(&ctlr->wait);
done:
csr32w(ctlr, Imr, ctlr->ie);
iunlock(ctlr);
}
static void
wpishutdown(Ether *edev)
{
Ctlr *ctlr;
ctlr = edev->ctlr;
if(ctlr->power)
poweroff(ctlr);
ctlr->broken = 0;
}
static Ctlr *wpihead, *wpitail;
static void
wpipci(void)
{
Pcidev *pdev;
pdev = nil;
while(pdev = pcimatch(pdev, 0x8086, 0)){
Ctlr *ctlr;
void *mem;
switch(pdev->did){
default:
continue;
case 0x4227:
break;
}
if(pdev->mem[0].bar & 1)
continue;
/* Clear device-specific "PCI retry timeout" register (41h). */
if(pcicfgr8(pdev, 0x41) != 0)
pcicfgw8(pdev, 0x41, 0);
ctlr = malloc(sizeof(Ctlr));
if(ctlr == nil) {
print("wpi: unable to alloc Ctlr\n");
continue;
}
ctlr->port = pdev->mem[0].bar & ~0xF;
mem = vmap(ctlr->port, pdev->mem[0].size);
if(mem == nil) {
print("wpi: can't map %llux\n", ctlr->port);
free(ctlr);
continue;
}
ctlr->nic = mem;
ctlr->pdev = pdev;
if(wpihead != nil)
wpitail->link = ctlr;
else
wpihead = ctlr;
wpitail = ctlr;
}
}
static int
wpipnp(Ether *edev)
{
Ctlr *ctlr;
if(wpihead == nil)
wpipci();
again:
for(ctlr = wpihead; ctlr != nil; ctlr = ctlr->link){
if(ctlr->active)
continue;
if(edev->port == 0 || edev->port == ctlr->port){
ctlr->active = 1;
break;
}
}
if(ctlr == nil)
return -1;
edev->ctlr = ctlr;
edev->port = ctlr->port;
edev->irq = ctlr->pdev->intl;
edev->tbdf = ctlr->pdev->tbdf;
edev->arg = edev;
edev->attach = wpiattach;
edev->ifstat = wpiifstat;
edev->ctl = wpictl;
edev->shutdown = wpishutdown;
edev->promiscuous = wpipromiscuous;
edev->multicast = wpimulticast;
edev->mbps = 54;
pcienable(ctlr->pdev);
if(wpiinit(edev) < 0){
pcidisable(ctlr->pdev);
edev->ctlr = nil;
goto again;
}
pcisetbme(ctlr->pdev);
intrenable(edev->irq, wpiinterrupt, edev, edev->tbdf, edev->name);
return 0;
}
void
etherwpilink(void)
{
addethercard("wpi", wpipnp);
}