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[realtek] Use explicit values for RCR.RXFTH and RCR.MXDMA

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Some RTL8169 cards (observed with an RTL8169SC) power up with invalid
values in RCR.RXFTH and RCR.MXDMA, causing receive DMA to fail.  Fix
by setting explicit values for both fields.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2012-08-23 12:25:08 +01:00
parent b0ba892333
commit 5d05220ee0
2 changed files with 10 additions and 2 deletions
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6
src/drivers/net/realtek.c
View File

@ -526,8 +526,10 @@ static int realtek_open ( struct net_device *netdev ) {
/* Configure receiver */
rcr = readl ( rtl->regs + RTL_RCR );
rcr &= ~( RTL_RCR_RBLEN_MASK );
rcr |= ( RTL_RCR_RBLEN_DEFAULT | RTL_RCR_WRAP | RTL_RCR_AB |
rcr &= ~( RTL_RCR_RXFTH_MASK | RTL_RCR_RBLEN_MASK |
RTL_RCR_MXDMA_MASK );
rcr |= ( RTL_RCR_RXFTH_DEFAULT | RTL_RCR_RBLEN_DEFAULT |
RTL_RCR_MXDMA_DEFAULT | RTL_RCR_WRAP | RTL_RCR_AB |
RTL_RCR_AM | RTL_RCR_APM | RTL_RCR_AAP );
writel ( rcr, rtl->regs + RTL_RCR );

6
src/drivers/net/realtek.h
View File

@ -134,9 +134,15 @@ enum realtek_legacy_status {
/** Receive (Rx) Configuration Register (dword) */
#define RTL_RCR 0x44
#define RTL_RCR_RXFTH(x) ( (x) << 13 ) /**< Receive FIFO threshold */
#define RTL_RCR_RXFTH_MASK RTL_RCR_RXFTH ( 0x7 )
#define RTL_RCR_RXFTH_DEFAULT RTL_RCR_RXFTH ( 0x7 /* Whole packet */ )
#define RTL_RCR_RBLEN(x) ( (x) << 11 ) /**< Receive buffer length */
#define RTL_RCR_RBLEN_MASK RTL_RCR_RBLEN ( 0x3 )
#define RTL_RCR_RBLEN_DEFAULT RTL_RCR_RBLEN ( 0 /* 8kB */ )
#define RTL_RCR_MXDMA(x) ( (x) << 8 ) /**< Max DMA burst size */
#define RTL_RCR_MXDMA_MASK RTL_RCR_MXDMA ( 0x7 )
#define RTL_RCR_MXDMA_DEFAULT RTL_RCR_MXDMA ( 0x7 /* Unlimited */ )
#define RTL_RCR_WRAP 0x00000080UL /**< Overrun receive buffer */
#define RTL_RCR_9356SEL 0x00000040UL /**< EEPROM is a 93C56 */
#define RTL_RCR_AB 0x00000008UL /**< Accept broadcast packets */