* Patch by Pavel Bartusek, 21 Mar 2004
Add Reiserfs support
* Patch by Hinko Kocevar, 20 Mar 2004
- Add auto-release for SMSC LAN91c111 driver
- Add save/restore of PTR and PNR regs as suggested in datasheet
diff --git a/drivers/smc91111.c b/drivers/smc91111.c
index 45bc248..4e180ec 100644
--- a/drivers/smc91111.c
+++ b/drivers/smc91111.c
@@ -481,7 +481,13 @@
int try = 0;
int time_out;
byte status;
+ byte saved_pnr;
+ word saved_ptr;
+ /* save PTR and PNR registers before manipulation */
+ SMC_SELECT_BANK (2);
+ saved_pnr = SMC_inb( PN_REG );
+ saved_ptr = SMC_inw( PTR_REG );
PRINTK3 ("%s:smc_hardware_send_packet\n", SMC_DEV_NAME);
@@ -559,6 +565,10 @@
/* we have a packet address, so tell the card to use it */
SMC_outb (packet_no, PN_REG);
+ /* do not write new ptr value if Write data fifo not empty */
+ while ( saved_ptr & PTR_NOTEMPTY )
+ printf ("Write data fifo not empty!\n");
+
/* point to the beginning of the packet */
SMC_outw (PTR_AUTOINC, PTR_REG);
@@ -607,12 +617,15 @@
SMC_outw (MC_ENQUEUE, MMU_CMD_REG);
/* poll for TX INT */
- if (poll4int (IM_TX_INT, SMC_TX_TIMEOUT)) {
+ /* if (poll4int (IM_TX_INT, SMC_TX_TIMEOUT)) { */
+ /* poll for TX_EMPTY INT - autorelease enabled */
+ if (poll4int(IM_TX_EMPTY_INT, SMC_TX_TIMEOUT)) {
/* sending failed */
PRINTK2 ("%s: TX timeout, sending failed...\n", SMC_DEV_NAME);
/* release packet */
- SMC_outw (MC_FREEPKT, MMU_CMD_REG);
+ /* no need to release, MMU does that now */
+ /* SMC_outw (MC_FREEPKT, MMU_CMD_REG); */
/* wait for MMU getting ready (low) */
while (SMC_inw (MMU_CMD_REG) & MC_BUSY) {
@@ -625,12 +638,14 @@
return 0;
} else {
/* ack. int */
- SMC_outb (IM_TX_INT, SMC91111_INT_REG);
+ SMC_outb (IM_TX_EMPTY_INT, SMC91111_INT_REG);
+ /* SMC_outb (IM_TX_INT, SMC91111_INT_REG); */
PRINTK2 ("%s: Sent packet of length %d \n", SMC_DEV_NAME,
length);
/* release packet */
- SMC_outw (MC_FREEPKT, MMU_CMD_REG);
+ /* no need to release, MMU does that now */
+ /* SMC_outw (MC_FREEPKT, MMU_CMD_REG); */
/* wait for MMU getting ready (low) */
while (SMC_inw (MMU_CMD_REG) & MC_BUSY) {
@@ -642,6 +657,10 @@
}
+ /* restore previously saved registers */
+ SMC_outb( saved_pnr, PN_REG );
+ SMC_outw( saved_ptr, PTR_REG );
+
return length;
}
@@ -730,8 +749,14 @@
#ifdef USE_32_BIT
dword stat_len;
#endif
+ byte saved_pnr;
+ word saved_ptr;
SMC_SELECT_BANK(2);
+ /* save PTR and PTR registers */
+ saved_pnr = SMC_inb( PN_REG );
+ saved_ptr = SMC_inw( PTR_REG );
+
packet_number = SMC_inw( RXFIFO_REG );
if ( packet_number & RXFIFO_REMPTY ) {
@@ -810,6 +835,10 @@
while ( SMC_inw( MMU_CMD_REG ) & MC_BUSY )
udelay(1); /* Wait until not busy */
+ /* restore saved registers */
+ SMC_outb( saved_pnr, PN_REG );
+ SMC_outw( saved_ptr, PTR_REG );
+
if (!is_error) {
/* Pass the packet up to the protocol layers. */
NetReceive(NetRxPackets[0], packet_length);
@@ -1252,6 +1281,11 @@
/* Update our Auto-Neg Advertisement Register */
smc_write_phy_register (PHY_AD_REG, my_ad_caps);
+ /* Read the register back. Without this, it appears that when */
+ /* auto-negotiation is restarted, sometimes it isn't ready and */
+ /* the link does not come up. */
+ smc_read_phy_register(PHY_AD_REG);
+
PRINTK2 ("%s:phy caps=%x\n", SMC_DEV_NAME, my_phy_caps);
PRINTK2 ("%s:phy advertised caps=%x\n", SMC_DEV_NAME, my_ad_caps);
