saa9730.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:29k
- /*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
- *
- * ########################################################################
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * ########################################################################
- *
- * SAA9730 ethernet driver.
- *
- */
- #include <linux/init.h>
- #include <linux/netdevice.h>
- #include <linux/delay.h>
- #include <linux/etherdevice.h>
- #include <linux/module.h>
- #include <linux/skbuff.h>
- #include <linux/pci.h>
- #include <asm/addrspace.h>
- #include <asm/mips-boards/prom.h>
- #include "saa9730.h"
- #ifdef LAN_SAA9730_DEBUG
- int lan_saa9730_debug = LAN_SAA9730_DEBUG;
- #else
- int lan_saa9730_debug;
- #endif
- /* Non-zero only if the current card is a PCI with BIOS-set IRQ. */
- static unsigned int pci_irq_line;
- #define INL(a) inl((unsigned long)a)
- #define OUTL(x,a) outl(x,(unsigned long)a)
- static void evm_saa9730_enable_lan_int(struct lan_saa9730_private *lp)
- {
- OUTL(INL(&lp->evm_saa9730_regs->InterruptBlock1) | EVM_LAN_INT,
- &lp->evm_saa9730_regs->InterruptBlock1);
- OUTL(INL(&lp->evm_saa9730_regs->InterruptStatus1) | EVM_LAN_INT,
- &lp->evm_saa9730_regs->InterruptStatus1);
- OUTL(INL(&lp->evm_saa9730_regs->InterruptEnable1) | EVM_LAN_INT |
- EVM_MASTER_EN, &lp->evm_saa9730_regs->InterruptEnable1);
- }
- static void evm_saa9730_disable_lan_int(struct lan_saa9730_private *lp)
- {
- OUTL(INL(&lp->evm_saa9730_regs->InterruptBlock1) & ~EVM_LAN_INT,
- &lp->evm_saa9730_regs->InterruptBlock1);
- OUTL(INL(&lp->evm_saa9730_regs->InterruptEnable1) & ~EVM_LAN_INT,
- &lp->evm_saa9730_regs->InterruptEnable1);
- }
- static void evm_saa9730_clear_lan_int(struct lan_saa9730_private *lp)
- {
- OUTL(EVM_LAN_INT, &lp->evm_saa9730_regs->InterruptStatus1);
- }
- static void evm_saa9730_block_lan_int(struct lan_saa9730_private *lp)
- {
- OUTL(INL(&lp->evm_saa9730_regs->InterruptBlock1) & ~EVM_LAN_INT,
- &lp->evm_saa9730_regs->InterruptBlock1);
- }
- static void evm_saa9730_unblock_lan_int(struct lan_saa9730_private *lp)
- {
- OUTL(INL(&lp->evm_saa9730_regs->InterruptBlock1) | EVM_LAN_INT,
- &lp->evm_saa9730_regs->InterruptBlock1);
- }
- static void show_saa9730_regs(struct lan_saa9730_private *lp)
- {
- int i, j;
- printk("TxmBufferA = %xn", lp->TxmBuffer[0][0]);
- printk("TxmBufferB = %xn", lp->TxmBuffer[1][0]);
- printk("RcvBufferA = %xn", lp->RcvBuffer[0][0]);
- printk("RcvBufferB = %xn", lp->RcvBuffer[1][0]);
- for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
- for (j = 0; j < LAN_SAA9730_TXM_Q_SIZE; j++) {
- printk("TxmBuffer[%d][%d] = %xn", i, j,
- le32_to_cpu(*(unsigned int *)
- lp->TxmBuffer[i][j]));
- }
- }
- for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
- for (j = 0; j < LAN_SAA9730_RCV_Q_SIZE; j++) {
- printk("RcvBuffer[%d][%d] = %xn", i, j,
- le32_to_cpu(*(unsigned int *)
- lp->RcvBuffer[i][j]));
- }
- }
- printk("lp->evm_saa9730_regs->InterruptBlock1 = %xn",
- INL(&lp->evm_saa9730_regs->InterruptBlock1));
- printk("lp->evm_saa9730_regs->InterruptStatus1 = %xn",
- INL(&lp->evm_saa9730_regs->InterruptStatus1));
- printk("lp->evm_saa9730_regs->InterruptEnable1 = %xn",
- INL(&lp->evm_saa9730_regs->InterruptEnable1));
- printk("lp->lan_saa9730_regs->Ok2Use = %xn",
- INL(&lp->lan_saa9730_regs->Ok2Use));
- printk("lp->NextTxmBufferIndex = %xn", lp->NextTxmBufferIndex);
- printk("lp->NextTxmPacketIndex = %xn", lp->NextTxmPacketIndex);
- printk("lp->PendingTxmBufferIndex = %xn",
- lp->PendingTxmBufferIndex);
- printk("lp->PendingTxmPacketIndex = %xn",
- lp->PendingTxmPacketIndex);
- printk("lp->lan_saa9730_regs->LanDmaCtl = %xn",
- INL(&lp->lan_saa9730_regs->LanDmaCtl));
- printk("lp->lan_saa9730_regs->DmaStatus = %xn",
- INL(&lp->lan_saa9730_regs->DmaStatus));
- printk("lp->lan_saa9730_regs->CamCtl = %xn",
- INL(&lp->lan_saa9730_regs->CamCtl));
- printk("lp->lan_saa9730_regs->TxCtl = %xn",
- INL(&lp->lan_saa9730_regs->TxCtl));
- printk("lp->lan_saa9730_regs->TxStatus = %xn",
- INL(&lp->lan_saa9730_regs->TxStatus));
- printk("lp->lan_saa9730_regs->RxCtl = %xn",
- INL(&lp->lan_saa9730_regs->RxCtl));
- printk("lp->lan_saa9730_regs->RxStatus = %xn",
- INL(&lp->lan_saa9730_regs->RxStatus));
- for (i = 0; i < LAN_SAA9730_CAM_DWORDS; i++) {
- OUTL(i, &lp->lan_saa9730_regs->CamAddress);
- printk("lp->lan_saa9730_regs->CamData = %xn",
- INL(&lp->lan_saa9730_regs->CamData));
- }
- printk("lp->stats.tx_packets = %lxn", lp->stats.tx_packets);
- printk("lp->stats.tx_errors = %lxn", lp->stats.tx_errors);
- printk("lp->stats.tx_aborted_errors = %lxn",
- lp->stats.tx_aborted_errors);
- printk("lp->stats.tx_window_errors = %lxn",
- lp->stats.tx_window_errors);
- printk("lp->stats.tx_carrier_errors = %lxn",
- lp->stats.tx_carrier_errors);
- printk("lp->stats.tx_fifo_errors = %lxn",
- lp->stats.tx_fifo_errors);
- printk("lp->stats.tx_heartbeat_errors = %lxn",
- lp->stats.tx_heartbeat_errors);
- printk("lp->stats.collisions = %lxn", lp->stats.collisions);
- printk("lp->stats.rx_packets = %lxn", lp->stats.rx_packets);
- printk("lp->stats.rx_errors = %lxn", lp->stats.rx_errors);
- printk("lp->stats.rx_dropped = %lxn", lp->stats.rx_dropped);
- printk("lp->stats.rx_crc_errors = %lxn", lp->stats.rx_crc_errors);
- printk("lp->stats.rx_frame_errors = %lxn",
- lp->stats.rx_frame_errors);
- printk("lp->stats.rx_fifo_errors = %lxn",
- lp->stats.rx_fifo_errors);
- printk("lp->stats.rx_length_errors = %lxn",
- lp->stats.rx_length_errors);
- printk("lp->lan_saa9730_regs->DebugPCIMasterAddr = %xn",
- INL(&lp->lan_saa9730_regs->DebugPCIMasterAddr));
- printk("lp->lan_saa9730_regs->DebugLanTxStateMachine = %xn",
- INL(&lp->lan_saa9730_regs->DebugLanTxStateMachine));
- printk("lp->lan_saa9730_regs->DebugLanRxStateMachine = %xn",
- INL(&lp->lan_saa9730_regs->DebugLanRxStateMachine));
- printk("lp->lan_saa9730_regs->DebugLanTxFifoPointers = %xn",
- INL(&lp->lan_saa9730_regs->DebugLanTxFifoPointers));
- printk("lp->lan_saa9730_regs->DebugLanRxFifoPointers = %xn",
- INL(&lp->lan_saa9730_regs->DebugLanRxFifoPointers));
- printk("lp->lan_saa9730_regs->DebugLanCtlStateMachine = %xn",
- INL(&lp->lan_saa9730_regs->DebugLanCtlStateMachine));
- }
- static void lan_saa9730_buffer_init(struct lan_saa9730_private *lp)
- {
- int i, j;
- /* Init RX buffers */
- for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
- for (j = 0; j < LAN_SAA9730_RCV_Q_SIZE; j++) {
- *(unsigned int *) lp->RcvBuffer[i][j] =
- cpu_to_le32(RXSF_READY <<
- RX_STAT_CTL_OWNER_SHF);
- }
- }
- /* Init TX buffers */
- for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
- for (j = 0; j < LAN_SAA9730_TXM_Q_SIZE; j++) {
- *(unsigned int *) lp->TxmBuffer[i][j] =
- cpu_to_le32(TXSF_EMPTY <<
- TX_STAT_CTL_OWNER_SHF);
- }
- }
- }
- static int lan_saa9730_allocate_buffers(struct lan_saa9730_private *lp)
- {
- unsigned int mem_size;
- void *Pa;
- unsigned int i, j, RcvBufferSize, TxmBufferSize;
- unsigned int buffer_start;
- /*
- * Allocate all RX and TX packets in one chunk.
- * The Rx and Tx packets must be PACKET_SIZE aligned.
- */
- mem_size = ((LAN_SAA9730_RCV_Q_SIZE + LAN_SAA9730_TXM_Q_SIZE) *
- LAN_SAA9730_PACKET_SIZE * LAN_SAA9730_BUFFERS) +
- LAN_SAA9730_PACKET_SIZE;
- buffer_start =
- (unsigned int) kmalloc(mem_size, GFP_DMA | GFP_KERNEL);
- /*
- * Set DMA buffer to kseg1 (uncached).
- * Make sure to flush before using it uncached.
- */
- Pa = (void *) KSEG1ADDR((buffer_start + LAN_SAA9730_PACKET_SIZE) &
- ~(LAN_SAA9730_PACKET_SIZE - 1));
- dma_cache_wback_inv((unsigned long) Pa, mem_size);
- /* Initialize buffer space */
- RcvBufferSize = LAN_SAA9730_PACKET_SIZE;
- TxmBufferSize = LAN_SAA9730_PACKET_SIZE;
- lp->DmaRcvPackets = LAN_SAA9730_RCV_Q_SIZE;
- lp->DmaTxmPackets = LAN_SAA9730_TXM_Q_SIZE;
- /* Init RX buffers */
- for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
- for (j = 0; j < LAN_SAA9730_RCV_Q_SIZE; j++) {
- *(unsigned int *) Pa =
- cpu_to_le32(RXSF_READY <<
- RX_STAT_CTL_OWNER_SHF);
- lp->RcvBuffer[i][j] = (unsigned int) Pa;
- Pa += RcvBufferSize;
- }
- }
- /* Init TX buffers */
- for (i = 0; i < LAN_SAA9730_BUFFERS; i++) {
- for (j = 0; j < LAN_SAA9730_TXM_Q_SIZE; j++) {
- *(unsigned int *) Pa =
- cpu_to_le32(TXSF_EMPTY <<
- TX_STAT_CTL_OWNER_SHF);
- lp->TxmBuffer[i][j] = (unsigned int) Pa;
- Pa += TxmBufferSize;
- }
- }
- /*
- * Set rx buffer A and rx buffer B to point to the first two buffer
- * spaces.
- */
- OUTL(PHYSADDR(lp->RcvBuffer[0][0]),
- &lp->lan_saa9730_regs->RxBuffA);
- OUTL(PHYSADDR(lp->RcvBuffer[1][0]),
- &lp->lan_saa9730_regs->RxBuffB);
- /* Initialize Buffer Index */
- lp->NextRcvPacketIndex = 0;
- lp->NextRcvToUseIsA = 1;
- /* Set current buffer index & next availble packet index */
- lp->NextTxmPacketIndex = 0;
- lp->NextTxmBufferIndex = 0;
- lp->PendingTxmPacketIndex = 0;
- lp->PendingTxmBufferIndex = 0;
- /*
- * Set txm_buf_a and txm_buf_b to point to the first two buffer
- * space
- */
- OUTL(PHYSADDR(lp->TxmBuffer[0][0]),
- &lp->lan_saa9730_regs->TxBuffA);
- OUTL(PHYSADDR(lp->TxmBuffer[1][0]),
- &lp->lan_saa9730_regs->TxBuffB);
- /* Set packet number */
- OUTL((lp->DmaRcvPackets << PK_COUNT_RX_A_SHF) |
- (lp->DmaRcvPackets << PK_COUNT_RX_B_SHF) |
- (lp->DmaTxmPackets << PK_COUNT_TX_A_SHF) |
- (lp->DmaTxmPackets << PK_COUNT_TX_B_SHF),
- &lp->lan_saa9730_regs->PacketCount);
- return 0;
- }
- static int lan_saa9730_cam_load(struct lan_saa9730_private *lp)
- {
- unsigned int i;
- unsigned char *NetworkAddress;
- NetworkAddress = (unsigned char *) &lp->PhysicalAddress[0][0];
- for (i = 0; i < LAN_SAA9730_CAM_DWORDS; i++) {
- /* First set address to where data is written */
- OUTL(i, &lp->lan_saa9730_regs->CamAddress);
- OUTL((NetworkAddress[0] << 24) | (NetworkAddress[1] << 16)
- | (NetworkAddress[2] << 8) | NetworkAddress[3],
- &lp->lan_saa9730_regs->CamData);
- NetworkAddress += 4;
- }
- return 0;
- }
- static int lan_saa9730_cam_init(struct net_device *dev)
- {
- struct lan_saa9730_private *lp =
- (struct lan_saa9730_private *) dev->priv;
- unsigned int i;
- /* Copy MAC-address into all entries. */
- for (i = 0; i < LAN_SAA9730_CAM_ENTRIES; i++) {
- memcpy((unsigned char *) lp->PhysicalAddress[i],
- (unsigned char *) dev->dev_addr, 6);
- }
- return 0;
- }
- static int lan_saa9730_mii_init(struct lan_saa9730_private *lp)
- {
- int i, l;
- /* Check link status, spin here till station is not busy. */
- i = 0;
- while (INL(&lp->lan_saa9730_regs->StationMgmtCtl) & MD_CA_BUSY) {
- i++;
- if (i > 100) {
- printk("Error: lan_saa9730_mii_init: timeoutn");
- return -1;
- }
- mdelay(1); /* wait 1 ms. */
- }
- /* Now set the control and address register. */
- OUTL(MD_CA_BUSY | PHY_STATUS | PHY_ADDRESS << MD_CA_PHY_SHF,
- &lp->lan_saa9730_regs->StationMgmtCtl);
- /* check link status, spin here till station is not busy */
- i = 0;
- while (INL(&lp->lan_saa9730_regs->StationMgmtCtl) & MD_CA_BUSY) {
- i++;
- if (i > 100) {
- printk("Error: lan_saa9730_mii_init: timeoutn");
- return -1;
- }
- mdelay(1); /* wait 1 ms. */
- }
- /* Wait for 1 ms. */
- mdelay(1);
- /* Check the link status. */
- if (INL(&lp->lan_saa9730_regs->StationMgmtData) &
- PHY_STATUS_LINK_UP) {
- /* Link is up. */
- return 0;
- } else {
- /* Link is down, reset the PHY first. */
- /* set PHY address = 'CONTROL' */
- OUTL(PHY_ADDRESS << MD_CA_PHY_SHF | MD_CA_WR | PHY_CONTROL,
- &lp->lan_saa9730_regs->StationMgmtCtl);
- /* Wait for 1 ms. */
- mdelay(1);
- /* set 'CONTROL' = force reset and renegotiate */
- OUTL(PHY_CONTROL_RESET | PHY_CONTROL_AUTO_NEG |
- PHY_CONTROL_RESTART_AUTO_NEG,
- &lp->lan_saa9730_regs->StationMgmtData);
- /* Wait for 50 ms. */
- mdelay(50);
- /* set 'BUSY' to start operation */
- OUTL(MD_CA_BUSY | PHY_ADDRESS << MD_CA_PHY_SHF | MD_CA_WR |
- PHY_CONTROL, &lp->lan_saa9730_regs->StationMgmtCtl);
- /* await completion */
- i = 0;
- while (INL(&lp->lan_saa9730_regs->StationMgmtCtl) &
- MD_CA_BUSY) {
- i++;
- if (i > 100) {
- printk
- ("Error: lan_saa9730_mii_init: timeoutn");
- return -1;
- }
- mdelay(1); /* wait 1 ms. */
- }
- /* Wait for 1 ms. */
- mdelay(1);
- for (l = 0; l < 2; l++) {
- /* set PHY address = 'STATUS' */
- OUTL(MD_CA_BUSY | PHY_ADDRESS << MD_CA_PHY_SHF |
- PHY_STATUS,
- &lp->lan_saa9730_regs->StationMgmtCtl);
- /* await completion */
- i = 0;
- while (INL(&lp->lan_saa9730_regs->StationMgmtCtl) &
- MD_CA_BUSY) {
- i++;
- if (i > 100) {
- printk
- ("Error: lan_saa9730_mii_init: timeoutn");
- return -1;
- }
- mdelay(1); /* wait 1 ms. */
- }
- /* wait for 3 sec. */
- mdelay(3000);
- /* check the link status */
- if (INL(&lp->lan_saa9730_regs->StationMgmtData) &
- PHY_STATUS_LINK_UP) {
- /* link is up */
- break;
- }
- }
- }
- return 0;
- }
- static int lan_saa9730_control_init(struct lan_saa9730_private *lp)
- {
- /* Initialize DMA control register. */
- OUTL((LANMB_ANY << DMA_CTL_MAX_XFER_SHF) |
- (LANEND_LITTLE << DMA_CTL_ENDIAN_SHF) |
- (LAN_SAA9730_RCV_Q_INT_THRESHOLD << DMA_CTL_RX_INT_COUNT_SHF)
- | DMA_CTL_RX_INT_TO_EN | DMA_CTL_RX_INT_EN |
- DMA_CTL_MAC_RX_INT_EN | DMA_CTL_MAC_TX_INT_EN,
- &lp->lan_saa9730_regs->LanDmaCtl);
- /* Initial MAC control register. */
- OUTL((MACCM_MII << MAC_CONTROL_CONN_SHF) | MAC_CONTROL_FULL_DUP,
- &lp->lan_saa9730_regs->MacCtl);
- /* Initialize CAM control register. */
- OUTL(CAM_CONTROL_COMP_EN | CAM_CONTROL_BROAD_ACC,
- &lp->lan_saa9730_regs->CamCtl);
- /*
- * Initialize CAM enable register, only turn on first entry, should
- * contain own addr.
- */
- OUTL(0x0001, &lp->lan_saa9730_regs->CamEnable);
- /* Initialize Tx control register */
- OUTL(TX_CTL_EN_COMP, &lp->lan_saa9730_regs->TxCtl);
- /* Initialize Rcv control register */
- OUTL(RX_CTL_STRIP_CRC, &lp->lan_saa9730_regs->RxCtl);
- /* Reset DMA engine */
- OUTL(DMA_TEST_SW_RESET, &lp->lan_saa9730_regs->DmaTest);
- return 0;
- }
- static int lan_saa9730_stop(struct lan_saa9730_private *lp)
- {
- int i;
- /* Stop DMA first */
- OUTL(INL(&lp->lan_saa9730_regs->LanDmaCtl) &
- ~(DMA_CTL_EN_TX_DMA | DMA_CTL_EN_RX_DMA),
- &lp->lan_saa9730_regs->LanDmaCtl);
- /* Set the SW Reset bits in DMA and MAC control registers */
- OUTL(DMA_TEST_SW_RESET, &lp->lan_saa9730_regs->DmaTest);
- OUTL(INL(&lp->lan_saa9730_regs->MacCtl) | MAC_CONTROL_RESET,
- &lp->lan_saa9730_regs->MacCtl);
- /*
- * Wait for MAC reset to have finished. The reset bit is auto cleared
- * when the reset is done.
- */
- i = 0;
- while (INL(&lp->lan_saa9730_regs->MacCtl) & MAC_CONTROL_RESET) {
- i++;
- if (i > 100) {
- printk
- ("Error: lan_sa9730_stop: MAC reset timeoutn");
- return -1;
- }
- mdelay(1); /* wait 1 ms. */
- }
- return 0;
- }
- static int lan_saa9730_dma_init(struct lan_saa9730_private *lp)
- {
- /* Stop lan controller. */
- lan_saa9730_stop(lp);
- OUTL(LAN_SAA9730_DEFAULT_TIME_OUT_CNT,
- &lp->lan_saa9730_regs->Timeout);
- return 0;
- }
- static int lan_saa9730_start(struct lan_saa9730_private *lp)
- {
- lan_saa9730_buffer_init(lp);
- /* Initialize Rx Buffer Index */
- lp->NextRcvPacketIndex = 0;
- lp->NextRcvToUseIsA = 1;
- /* Set current buffer index & next availble packet index */
- lp->NextTxmPacketIndex = 0;
- lp->NextTxmBufferIndex = 0;
- lp->PendingTxmPacketIndex = 0;
- lp->PendingTxmBufferIndex = 0;
- OUTL(INL(&lp->lan_saa9730_regs->LanDmaCtl) | DMA_CTL_EN_TX_DMA |
- DMA_CTL_EN_RX_DMA, &lp->lan_saa9730_regs->LanDmaCtl);
- /* For Tx, turn on MAC then DMA */
- OUTL(INL(&lp->lan_saa9730_regs->TxCtl) | TX_CTL_TX_EN,
- &lp->lan_saa9730_regs->TxCtl);
- /* For Rx, turn on DMA then MAC */
- OUTL(INL(&lp->lan_saa9730_regs->RxCtl) | RX_CTL_RX_EN,
- &lp->lan_saa9730_regs->RxCtl);
- /* Set Ok2Use to let hardware owns the buffers */
- OUTL(OK2USE_RX_A | OK2USE_RX_B | OK2USE_TX_A | OK2USE_TX_B,
- &lp->lan_saa9730_regs->Ok2Use);
- return 0;
- }
- static int lan_saa9730_restart(struct lan_saa9730_private *lp)
- {
- lan_saa9730_stop(lp);
- lan_saa9730_start(lp);
- return 0;
- }
- static int lan_saa9730_tx(struct net_device *dev)
- {
- struct lan_saa9730_private *lp =
- (struct lan_saa9730_private *) dev->priv;
- unsigned int *pPacket;
- unsigned int tx_status;
- if (lan_saa9730_debug > 5)
- printk("lan_saa9730_tx interruptn");
- /* Clear interrupt. */
- OUTL(DMA_STATUS_MAC_TX_INT, &lp->lan_saa9730_regs->DmaStatus);
- while (1) {
- pPacket =
- (unsigned int *) lp->TxmBuffer[lp->
- PendingTxmBufferIndex]
- [lp->PendingTxmPacketIndex];
- /* Get status of first packet transmitted. */
- tx_status = le32_to_cpu(*pPacket);
- /* Check ownership. */
- if ((tx_status & TX_STAT_CTL_OWNER_MSK) !=
- (TXSF_HWDONE << TX_STAT_CTL_OWNER_SHF)) break;
- /* Check for error. */
- if (tx_status & TX_STAT_CTL_ERROR_MSK) {
- if (lan_saa9730_debug > 1)
- printk("lan_saa9730_tx: tx error = %xn",
- tx_status);
- lp->stats.tx_errors++;
- if (tx_status &
- (TX_STATUS_EX_COLL << TX_STAT_CTL_STATUS_SHF))
- lp->stats.tx_aborted_errors++;
- if (tx_status &
- (TX_STATUS_LATE_COLL <<
- TX_STAT_CTL_STATUS_SHF)) lp->stats.
- tx_window_errors++;
- if (tx_status &
- (TX_STATUS_L_CARR << TX_STAT_CTL_STATUS_SHF))
- lp->stats.tx_carrier_errors++;
- if (tx_status &
- (TX_STATUS_UNDER << TX_STAT_CTL_STATUS_SHF))
- lp->stats.tx_fifo_errors++;
- if (tx_status &
- (TX_STATUS_SQ_ERR << TX_STAT_CTL_STATUS_SHF))
- lp->stats.tx_heartbeat_errors++;
- lp->stats.collisions +=
- tx_status & TX_STATUS_TX_COLL_MSK;
- }
- /* Free buffer. */
- *pPacket =
- cpu_to_le32(TXSF_EMPTY << TX_STAT_CTL_OWNER_SHF);
- /* Update pending index pointer. */
- lp->PendingTxmPacketIndex++;
- if (lp->PendingTxmPacketIndex >= LAN_SAA9730_TXM_Q_SIZE) {
- lp->PendingTxmPacketIndex = 0;
- lp->PendingTxmBufferIndex ^= 1;
- }
- }
- /* Make sure A and B are available to hardware. */
- OUTL(OK2USE_TX_A | OK2USE_TX_B, &lp->lan_saa9730_regs->Ok2Use);
- if (netif_queue_stopped(dev)) {
- /* The tx buffer is no longer full. */
- netif_wake_queue(dev);
- }
- return 0;
- }
- static int lan_saa9730_rx(struct net_device *dev)
- {
- struct lan_saa9730_private *lp =
- (struct lan_saa9730_private *) dev->priv;
- int len = 0;
- struct sk_buff *skb = 0;
- unsigned int rx_status;
- int BufferIndex;
- int PacketIndex;
- unsigned int *pPacket;
- unsigned char *pData;
- if (lan_saa9730_debug > 5)
- printk("lan_saa9730_rx interruptn");
- /* Clear receive interrupts. */
- OUTL(DMA_STATUS_MAC_RX_INT | DMA_STATUS_RX_INT |
- DMA_STATUS_RX_TO_INT, &lp->lan_saa9730_regs->DmaStatus);
- /* Address next packet */
- if (lp->NextRcvToUseIsA)
- BufferIndex = 0;
- else
- BufferIndex = 1;
- PacketIndex = lp->NextRcvPacketIndex;
- pPacket = (unsigned int *) lp->RcvBuffer[BufferIndex][PacketIndex];
- rx_status = le32_to_cpu(*pPacket);
- /* Process each packet. */
- while ((rx_status & RX_STAT_CTL_OWNER_MSK) ==
- (RXSF_HWDONE << RX_STAT_CTL_OWNER_SHF)) {
- /* Check the rx status. */
- if (rx_status & (RX_STATUS_GOOD << RX_STAT_CTL_STATUS_SHF)) {
- /* Received packet is good. */
- len = (rx_status & RX_STAT_CTL_LENGTH_MSK) >>
- RX_STAT_CTL_LENGTH_SHF;
- pData = (unsigned char *) pPacket;
- pData += 4;
- skb = dev_alloc_skb(len + 2);
- if (skb == 0) {
- printk
- ("%s: Memory squeeze, deferring packet.n",
- dev->name);
- lp->stats.rx_dropped++;
- } else {
- lp->stats.rx_bytes += len;
- lp->stats.rx_packets++;
- skb->dev = dev;
- skb_reserve(skb, 2); /* 16 byte align */
- skb_put(skb, len); /* make room */
- eth_copy_and_sum(skb,
- (unsigned char *) pData,
- len, 0);
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
- }
- } else {
- /* We got an error packet. */
- if (lan_saa9730_debug > 2)
- printk
- ("lan_saa9730_rx: We got an error packet = %xn",
- rx_status);
- lp->stats.rx_errors++;
- if (rx_status &
- (RX_STATUS_CRC_ERR << RX_STAT_CTL_STATUS_SHF))
- lp->stats.rx_crc_errors++;
- if (rx_status &
- (RX_STATUS_ALIGN_ERR <<
- RX_STAT_CTL_STATUS_SHF)) lp->stats.
- rx_frame_errors++;
- if (rx_status &
- (RX_STATUS_OVERFLOW << RX_STAT_CTL_STATUS_SHF))
- lp->stats.rx_fifo_errors++;
- if (rx_status &
- (RX_STATUS_LONG_ERR << RX_STAT_CTL_STATUS_SHF))
- lp->stats.rx_length_errors++;
- }
- /* Indicate we have processed the buffer. */
- *pPacket =
- cpu_to_le32(RXSF_READY << RX_STAT_CTL_OWNER_SHF);
- /* Go to next packet in sequence. */
- lp->NextRcvPacketIndex++;
- if (lp->NextRcvPacketIndex >= LAN_SAA9730_RCV_Q_SIZE) {
- lp->NextRcvPacketIndex = 0;
- if (BufferIndex) {
- lp->NextRcvToUseIsA = 1;
- } else {
- lp->NextRcvToUseIsA = 0;
- }
- }
- OUTL(OK2USE_RX_A | OK2USE_RX_B,
- &lp->lan_saa9730_regs->Ok2Use);
- /* Address next packet */
- if (lp->NextRcvToUseIsA)
- BufferIndex = 0;
- else
- BufferIndex = 1;
- PacketIndex = lp->NextRcvPacketIndex;
- pPacket =
- (unsigned int *) lp->
- RcvBuffer[BufferIndex][PacketIndex];
- rx_status = le32_to_cpu(*pPacket);
- }
- /* Make sure A and B are available to hardware. */
- OUTL(OK2USE_RX_A | OK2USE_RX_B, &lp->lan_saa9730_regs->Ok2Use);
- return 0;
- }
- static void lan_saa9730_interrupt(const int irq, void *dev_id,
- struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *) dev_id;
- struct lan_saa9730_private *lp =
- (struct lan_saa9730_private *) dev->priv;
- if (lan_saa9730_debug > 5)
- printk("lan_saa9730_interruptn");
- /* Disable the EVM LAN interrupt. */
- evm_saa9730_block_lan_int(lp);
- /* Clear the EVM LAN interrupt. */
- evm_saa9730_clear_lan_int(lp);
- /* Service pending transmit interrupts. */
- if (INL(&lp->lan_saa9730_regs->DmaStatus) & DMA_STATUS_MAC_TX_INT)
- lan_saa9730_tx(dev);
- /* Service pending receive interrupts. */
- if (INL(&lp->lan_saa9730_regs->DmaStatus) &
- (DMA_STATUS_MAC_RX_INT | DMA_STATUS_RX_INT |
- DMA_STATUS_RX_TO_INT)) lan_saa9730_rx(dev);
- /* Enable the EVM LAN interrupt. */
- evm_saa9730_unblock_lan_int(lp);
- return;
- }
- static int lan_saa9730_open_fail(struct net_device *dev)
- {
- return -ENODEV;
- }
- static int lan_saa9730_open(struct net_device *dev)
- {
- struct lan_saa9730_private *lp =
- (struct lan_saa9730_private *) dev->priv;
- /* Associate IRQ with lan_saa9730_interrupt */
- if (request_irq(dev->irq, &lan_saa9730_interrupt, 0, "SAA9730 Eth",
- dev)) {
- printk("lan_saa9730_open: Can't get irq %dn", dev->irq);
- return -EAGAIN;
- }
- /* Enable the Lan interrupt in the event manager. */
- evm_saa9730_enable_lan_int(lp);
- /* Start the LAN controller */
- if (lan_saa9730_start(lp))
- return -1;
- netif_start_queue(dev);
- return 0;
- }
- static int lan_saa9730_write(struct lan_saa9730_private *lp,
- struct sk_buff *skb, int skblen)
- {
- unsigned char *pbData = skb->data;
- unsigned int len = skblen;
- unsigned char *pbPacketData;
- unsigned int tx_status;
- int BufferIndex;
- int PacketIndex;
- if (lan_saa9730_debug > 5)
- printk("lan_saa9730_write: skb=%08xn",
- (unsigned int) skb);
- BufferIndex = lp->NextTxmBufferIndex;
- PacketIndex = lp->NextTxmPacketIndex;
- tx_status =
- le32_to_cpu(*(unsigned int *) lp->
- TxmBuffer[BufferIndex][PacketIndex]);
- if ((tx_status & TX_STAT_CTL_OWNER_MSK) !=
- (TXSF_EMPTY << TX_STAT_CTL_OWNER_SHF)) {
- if (lan_saa9730_debug > 4)
- printk
- ("lan_saa9730_write: Tx buffer not available: tx_status = %xn",
- tx_status);
- return -1;
- }
- lp->NextTxmPacketIndex++;
- if (lp->NextTxmPacketIndex >= LAN_SAA9730_TXM_Q_SIZE) {
- lp->NextTxmPacketIndex = 0;
- lp->NextTxmBufferIndex ^= 1;
- }
- pbPacketData =
- (unsigned char *) lp->TxmBuffer[BufferIndex][PacketIndex];
- pbPacketData += 4;
- /* copy the bits */
- memcpy(pbPacketData, pbData, len);
- /* Set transmit status for hardware */
- *(unsigned int *) lp->TxmBuffer[BufferIndex][PacketIndex] =
- cpu_to_le32((TXSF_READY << TX_STAT_CTL_OWNER_SHF) |
- (TX_STAT_CTL_INT_AFTER_TX << TX_STAT_CTL_FRAME_SHF)
- | (len << TX_STAT_CTL_LENGTH_SHF));
- /* Set hardware tx buffer. */
- OUTL(OK2USE_TX_A | OK2USE_TX_B, &lp->lan_saa9730_regs->Ok2Use);
- return 0;
- }
- static void lan_saa9730_tx_timeout(struct net_device *dev)
- {
- struct lan_saa9730_private *lp =
- (struct lan_saa9730_private *) dev->priv;
- /* Transmitter timeout, serious problems */
- lp->stats.tx_errors++;
- printk("%s: transmit timed out, resetn", dev->name);
- /*show_saa9730_regs(lp); */
- lan_saa9730_restart(lp);
- dev->trans_start = jiffies;
- netif_start_queue(dev);
- }
- static int lan_saa9730_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
- {
- struct lan_saa9730_private *lp =
- (struct lan_saa9730_private *) dev->priv;
- unsigned long flags;
- int skblen;
- int len;
- if (lan_saa9730_debug > 4)
- printk("Send packet: skb=%08xn", (unsigned int) skb);
- skblen = skb->len;
- save_and_cli(flags);
- len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
- if (lan_saa9730_write(lp, skb, skblen)) {
- restore_flags(flags);
- printk
- ("Error when writing packet to controller: skb=%08xn",
- (unsigned int) skb);
- netif_stop_queue(dev);
- return -1;
- }
- lp->stats.tx_bytes += len;
- lp->stats.tx_packets++;
- dev->trans_start = jiffies;
- netif_start_queue(dev);
- dev_kfree_skb(skb);
- restore_flags(flags);
- return 0;
- }
- static int lan_saa9730_close(struct net_device *dev)
- {
- struct lan_saa9730_private *lp =
- (struct lan_saa9730_private *) dev->priv;
- if (lan_saa9730_debug > 1)
- printk("lan_saa9730_close:n");
- netif_stop_queue(dev);
- /* Disable the Lan interrupt in the event manager. */
- evm_saa9730_disable_lan_int(lp);
- /* Stop the controller */
- if (lan_saa9730_stop(lp))
- return -1;
- free_irq(dev->irq, (void *) dev);
- return 0;
- }
- static struct net_device_stats *lan_saa9730_get_stats(struct net_device
- *dev)
- {
- struct lan_saa9730_private *lp =
- (struct lan_saa9730_private *) dev->priv;
- return &lp->stats;
- }
- static void lan_saa9730_set_multicast(struct net_device *dev)
- {
- struct lan_saa9730_private *lp =
- (struct lan_saa9730_private *) dev->priv;
- /* Stop the controller */
- lan_saa9730_stop(lp);
- if (dev->flags & IFF_PROMISC) {
- /* accept all packets */
- OUTL(CAM_CONTROL_COMP_EN | CAM_CONTROL_STATION_ACC |
- CAM_CONTROL_GROUP_ACC | CAM_CONTROL_BROAD_ACC,
- &lp->lan_saa9730_regs->CamCtl);
- } else {
- if (dev->flags & IFF_ALLMULTI) {
- /* accept all multicast packets */
- OUTL(CAM_CONTROL_COMP_EN | CAM_CONTROL_GROUP_ACC |
- CAM_CONTROL_BROAD_ACC,
- &lp->lan_saa9730_regs->CamCtl);
- } else {
- /*
- * Will handle the multicast stuff later. -carstenl
- */
- }
- }
- lan_saa9730_restart(lp);
- }
- static int lan_saa9730_init(struct net_device *dev, int ioaddr, int irq)
- {
- struct lan_saa9730_private *lp;
- unsigned char ethernet_addr[6];
- dev = init_etherdev(dev, 0);
- dev->open = lan_saa9730_open_fail;
- if (get_ethernet_addr(ethernet_addr))
- return -1;
- memcpy(dev->dev_addr, ethernet_addr, 6);
- dev->base_addr = ioaddr;
- dev->irq = irq;
- /*
- * Make certain the data structures used by the controller are aligned
- * and DMAble.
- */
- lp = (struct lan_saa9730_private *) (((unsigned long)
- kmalloc(sizeof(*lp) + 7,
- GFP_DMA | GFP_KERNEL)
- + 7) & ~7);
- dev->priv = lp;
- memset(lp, 0, sizeof(*lp));
- /* Set SAA9730 LAN base address. */
- lp->lan_saa9730_regs = (t_lan_saa9730_regmap *) (ioaddr +
- SAA9730_LAN_REGS_ADDR);
- /* Set SAA9730 EVM base address. */
- lp->evm_saa9730_regs = (t_evm_saa9730_regmap *) (ioaddr +
- SAA9730_EVM_REGS_ADDR);
- /* Allocate LAN RX/TX frame buffer space. */
- if (lan_saa9730_allocate_buffers(lp))
- return -1;
- /* Stop LAN controller. */
- if (lan_saa9730_stop(lp))
- return -1;
- /* Initialize CAM registers. */
- if (lan_saa9730_cam_init(dev))
- return -1;
- /* Initialize MII registers. */
- if (lan_saa9730_mii_init(lp))
- return -1;
- /* Initialize control registers. */
- if (lan_saa9730_control_init(lp))
- return -1;
- /* Load CAM registers. */
- if (lan_saa9730_cam_load(lp))
- return -1;
- /* Initialize DMA context registers. */
- if (lan_saa9730_dma_init(lp))
- return -1;
- dev->open = lan_saa9730_open;
- dev->hard_start_xmit = lan_saa9730_start_xmit;
- dev->stop = lan_saa9730_close;
- dev->get_stats = lan_saa9730_get_stats;
- dev->set_multicast_list = lan_saa9730_set_multicast;
- dev->tx_timeout = lan_saa9730_tx_timeout;
- dev->watchdog_timeo = (HZ >> 1);
- dev->dma = 0;
- return 0;
- }
- static int __init saa9730_probe(void)
- {
- struct net_device *dev = NULL;
- if (pci_present()) {
- struct pci_dev *pdev = NULL;
- if (lan_saa9730_debug > 1)
- printk
- ("saa9730.c: PCI bios is present, checking for devices...n");
- while ((pdev = pci_find_device(PCI_VENDOR_ID_PHILIPS,
- PCI_DEVICE_ID_PHILIPS_SAA9730,
- pdev))) {
- unsigned int pci_ioaddr;
- pci_irq_line = pdev->irq;
- /* LAN base address in located at BAR 1. */
- pci_ioaddr = pci_resource_start(pdev, 1);
- pci_set_master(pdev);
- printk("Found SAA9730 (PCI) at %#x, irq %d.n",
- pci_ioaddr, pci_irq_line);
- if (!lan_saa9730_init
- (dev, pci_ioaddr, pci_irq_line)) return 0;
- else
- printk("Lan init failed.n");
- }
- }
- return -ENODEV;
- }
- module_init(saa9730_probe);
- MODULE_LICENSE("GPL");