#define INT_CMDINPROGRESS (1<<12)
#define INT_WINDOWNUMBER (7<<13)
-
-/*** TX descriptor ***/
-typedef struct
- {
- unsigned int DnNextPtr;
- unsigned int FrameStartHeader;
- struct {
- unsigned int addr;
- unsigned int len;
- } __attribute ((aligned(8))) segments[64];
- }
- TXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
+/* These structures are all 64-bit aligned, as needed for bus-mastering I/O. */
+typedef struct {
+ unsigned int addr;
+ unsigned int len;
+} segment_t __attribute__ ((aligned(8)));
+
+typedef struct {
+ unsigned int next;
+ unsigned int hdr;
+ segment_t segments[64 /* XXX magic */];
+} txdesc_t __attribute__ ((aligned(8)));
/*** RX descriptor ***/
-typedef struct
- {
- unsigned int UpNextPtr;
- unsigned int UpPktStatus;
- unsigned int DataAddr;
- unsigned int DataLength;
- }
- RXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
+typedef struct {
+ unsigned int next;
+ unsigned int status;
+ segment_t segments[64];
+} rxdesc_t __attribute__ ((aligned(8)));
/*** Global variables ***/
static struct
unsigned char CurrentWindow;
unsigned int IOAddr;
unsigned char HWAddr[ETH_ALEN];
- TXD TransmitDPD;
- RXD ReceiveUPD;
}
INF_3C90X;
+
static struct nic nic;
+static txdesc_t txdesc;
+static rxdesc_t rxdesc;
+static struct pbuf *currecv;
+
#define _outl(v,a) outl((a),(v))
#define _outw(v,a) outw((a),(v))
***/
static void a3c90x_reset(void)
{
-#ifdef CFG_3C90X_PRESERVE_XCVR
- int cfg;
- /** Read the current InternalConfig value. **/
- _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
- cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
-#endif
-
/** Send the reset command to the card **/
outputf("3c90x: issuing RESET");
_issue_command(INF_3C90X.IOAddr, cmdGlobalReset, 0);
_outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
_outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
-#ifdef CFG_3C90X_PRESERVE_XCVR
- /** Re-set the original InternalConfig value from before reset **/
- _set_window(INF_3C90X.IOAddr, winTxRxOptions3);
- _outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
-
- /** enable DC converter for 10-Base-T **/
- if ((cfg&0x0300) == 0x0300)
- {
- _issue_command(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
- }
-#endif
-
/** Issue transmit reset, wait for command completion **/
_issue_command(INF_3C90X.IOAddr, cmdTxReset, 0);
if (! INF_3C90X.isBrev)
_issue_command(INF_3C90X.IOAddr, cmdStallCtl, 2 /* Stall download */);
/** Setup the DPD (download descriptor) **/
- INF_3C90X.TransmitDPD.DnNextPtr = 0;
+ txdesc.next = 0;
len = 0;
n = 0;
oldpbuf = p;
for (; p; p = p->next)
{
- INF_3C90X.TransmitDPD.segments[n].addr = v2p(p->payload);
- INF_3C90X.TransmitDPD.segments[n].len = p->len | (p->next ? 0 : (1 << 31));
+ txdesc.segments[n].addr = v2p(p->payload);
+ txdesc.segments[n].len = p->len | (p->next ? 0 : (1 << 31));
len += p->len;
pbuf_ref(p);
n++;
}
/** set notification for transmission completion (bit 15) **/
- INF_3C90X.TransmitDPD.FrameStartHeader = (len) | 0x8000;
+ txdesc.hdr = (len) | 0x8000;
outputf("3c90x: Sending %d byte %d seg packet", len, n);
/** Send the packet **/
- outl(INF_3C90X.IOAddr + regDnListPtr_l, v2p(&(INF_3C90X.TransmitDPD)));
+ outl(INF_3C90X.IOAddr + regDnListPtr_l, v2p(&txdesc));
_issue_command(INF_3C90X.IOAddr, cmdStallCtl, 3 /* Unstall download */);
oneshot_start_ms(10);
#endif
}
-
+/* _setup_recv allocates and sets a pbuf from lwIP as the active receive
+ * packet chain for the 3c90x. The 3c90x must not be trying to receive
+ * when _setup_recv is being called.
+ */
+static void _setup_recv(struct nic *nic)
+{
+ struct pbuf *p, *q;
+ int i;
+
+ rxdesc.status = 0; /* Clear it out in the very beginning. */
+
+ p = pbuf_alloc(PBUF_RAW, 1536 /* XXX magic Max len */, PBUF_POOL);
+ if (!p)
+ {
+ outputf("3c90x: out of memory for packet?");
+ currecv = p;
+ return;
+ }
+
+ rxdesc.next = 0;
+ rxdesc.status = 0;
+ for (i = 0, q = p; q; q = q->next, i++)
+ {
+ rxdesc.segments[i].addr = v2p(q->payload);
+ rxdesc.segments[i].len = q->len | (q->next ? 0 : (1 << 31));
+ }
+
+ outl(INF_3C90X.IOAddr + regUpListPtr_l, v2p(&rxdesc));
+
+ currecv = p;
+}
/*** a3c90x_poll: exported routine that waits for a certain length of time
*** for a packet, and if it sees none, returns 0. This routine should
*** copy the packet to nic->packet if it gets a packet and set the size
*** in nic->packetlen. Return 1 if a packet was found.
***/
-static int
-a3c90x_poll(struct nic *nic, int retrieve)
- {
- int i, errcode;
-
- if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0010))
- {
- return 0;
- }
-
- if ( ! retrieve ) return 1;
-
- /** we don't need to acknowledge rxComplete -- the upload engine
- ** does it for us.
- **/
-
- /** Build the up-load descriptor **/
- INF_3C90X.ReceiveUPD.UpNextPtr = 0;
- INF_3C90X.ReceiveUPD.UpPktStatus = 0;
- INF_3C90X.ReceiveUPD.DataAddr = v2p(nic->packet);
- INF_3C90X.ReceiveUPD.DataLength = 1536 + (1<<31);
-
- /** Submit the upload descriptor to the NIC **/
- _outl(v2p(&(INF_3C90X.ReceiveUPD)),
- INF_3C90X.IOAddr + regUpListPtr_l);
-
- /** Wait for upload completion (upComplete(15) or upError (14)) **/
- for(i=0;i<40000;i++);
- while((INF_3C90X.ReceiveUPD.UpPktStatus & ((1<<14) | (1<<15))) == 0)
- for(i=0;i<40000;i++);
-
- /** Check for Error (else we have good packet) **/
- if (INF_3C90X.ReceiveUPD.UpPktStatus & (1<<14))
+static struct pbuf * a3c90x_poll(struct nic *nic)
+{
+ int errcode;
+ struct pbuf *p;
+
+ if (!currecv)
+ _setup_recv(nic);
+
+ /* Nothing to do? */
+ if ((rxdesc.status & ((1<<14) | (1<<15))) == 0)
+ return NULL;
+
+ p = currecv;
+
+ /** Check for Error (else we have good packet) **/
+ if (rxdesc.status & (1<<14))
{
- errcode = INF_3C90X.ReceiveUPD.UpPktStatus;
- if (errcode & (1<<16))
- outputf("3C90X: Rx Overrun (%hX)",errcode>>16);
- else if (errcode & (1<<17))
- outputf("3C90X: Runt Frame (%hX)",errcode>>16);
- else if (errcode & (1<<18))
- outputf("3C90X: Alignment Error (%hX)",errcode>>16);
- else if (errcode & (1<<19))
- outputf("3C90X: CRC Error (%hX)",errcode>>16);
- else if (errcode & (1<<20))
- outputf("3C90X: Oversized Frame (%hX)",errcode>>16);
- else
- outputf("3C90X: Packet error (%hX)",errcode>>16);
- return 0;
+ errcode = rxdesc.status;
+ if (errcode & (1<<16))
+ outputf("3C90X: Rx Overrun (%hX)",errcode>>16);
+ else if (errcode & (1<<17))
+ outputf("3C90X: Runt Frame (%hX)",errcode>>16);
+ else if (errcode & (1<<18))
+ outputf("3C90X: Alignment Error (%hX)",errcode>>16);
+ else if (errcode & (1<<19))
+ outputf("3C90X: CRC Error (%hX)",errcode>>16);
+ else if (errcode & (1<<20))
+ outputf("3C90X: Oversized Frame (%hX)",errcode>>16);
+ else
+ outputf("3C90X: Packet error (%hX)",errcode>>16);
+
+ pbuf_free(p); /* Bounce the old one before setting it up again. */
+ _setup_recv(nic);
+ return NULL;
}
- /** Ok, got packet. Set length in nic->packetlen. **/
- nic->packetlen = (INF_3C90X.ReceiveUPD.UpPktStatus & 0x1FFF);
-
- return 1;
- }
-
-
+ pbuf_realloc(p, rxdesc.status & 0x1FFF); /* Resize the packet to how large it actually is. */
+ _setup_recv(nic); /* ..and light the NIC up again. */
+
+ return p;
+}
/*** a3c90x_disable: exported routine to disable the card. What's this for?
*** the eepro100.c driver didn't have one, so I just left this one empty too.
linktype = 0x0008;
if (mopt & 0x01)
{
- outputf("%s100Base-T4",(c++)?", ":"");
+ outputf(" 100Base-T4");
linktype = 0x0006;
}
if (mopt & 0x04)
{
- outputf("%s100Base-FX",(c++)?", ":"");
+ outputf(" 100Base-FX");
linktype = 0x0005;
}
if (mopt & 0x10)
{
- outputf("%s10Base-2",(c++)?", ":"");
+ outputf(" 10Base-2");
linktype = 0x0003;
}
if (mopt & 0x20)
{
- outputf("%sAUI",(c++)?", ":"");
+ outputf(" AUI");
linktype = 0x0001;
}
if (mopt & 0x40)
{
- outputf("%sMII",(c++)?", ":"");
+ outputf(" MII");
linktype = 0x0006;
}
if ((mopt & 0xA) == 0xA)
{
- outputf("%s10Base-T / 100Base-TX",(c++)?", ":"");
+ outputf(" 10Base-T / 100Base-TX");
linktype = 0x0008;
}
else if ((mopt & 0xA) == 0x2)
{
- outputf("%s100Base-TX",(c++)?", ":"");
+ outputf(" 100Base-TX");
linktype = 0x0008;
}
else if ((mopt & 0xA) == 0x8)
{
- outputf("%s10Base-T",(c++)?", ":"");
+ outputf(" 10Base-T");
linktype = 0x0008;
}
- outputf(".");
/** Determine transceiver type to use, depending on value stored in
** eeprom 0x16
/** Set the RX filter = receive only individual pkts & multicast & bcast. **/
_issue_command(INF_3C90X.IOAddr, cmdSetRxFilter, 0x01 + 0x02 + 0x04);
_issue_command(INF_3C90X.IOAddr, cmdRxEnable, 0);
-
+
+ /* Now stick a packet in the queue. */
+ _setup_recv(&nic);
/**
** set Indication and Interrupt flags , acknowledge any IRQ's
_issue_command(INF_3C90X.IOAddr, cmdAcknowledgeInterrupt, 0x661);
/* * Set our exported functions **/
- nic.poll = a3c90x_poll;
+ nic.recv = a3c90x_poll;
nic.transmit = a3c90x_transmit;
memcpy(nic.hwaddr, INF_3C90X.HWAddr, 6);
eth_register(&nic);
git.joshuawise.com / netwatch.git / blobdiff