diff options
Diffstat (limited to 'drivers/net/saa9730.c')
| -rw-r--r-- | drivers/net/saa9730.c | 1184 |
1 files changed, 1184 insertions, 0 deletions
diff --git a/drivers/net/saa9730.c b/drivers/net/saa9730.c new file mode 100644 index 00000000000..fd0167077fb --- /dev/null +++ b/drivers/net/saa9730.c @@ -0,0 +1,1184 @@ +/* + * 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. + * + * Changes: + * Angelo Dell'Aera <buffer@antifork.org> : Conversion to the new PCI API (pci_driver). + * Conversion to spinlocks. + * Error handling fixes. + * + */ + +#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 <linux/spinlock.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 + +#define DRV_MODULE_NAME "saa9730" + +static struct pci_device_id saa9730_pci_tbl[] = { + { PCI_VENDOR_ID_PHILIPS, PCI_DEVICE_ID_PHILIPS_SAA9370, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, saa9730_pci_tbl); + +/* 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 = %x\n", lp->TxmBuffer[0][0]); + printk("TxmBufferB = %x\n", lp->TxmBuffer[1][0]); + printk("RcvBufferA = %x\n", lp->RcvBuffer[0][0]); + printk("RcvBufferB = %x\n", 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] = %x\n", 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] = %x\n", i, j, + le32_to_cpu(*(unsigned int *) + lp->RcvBuffer[i][j])); + } + } + printk("lp->evm_saa9730_regs->InterruptBlock1 = %x\n", + INL(&lp->evm_saa9730_regs->InterruptBlock1)); + printk("lp->evm_saa9730_regs->InterruptStatus1 = %x\n", + INL(&lp->evm_saa9730_regs->InterruptStatus1)); + printk("lp->evm_saa9730_regs->InterruptEnable1 = %x\n", + INL(&lp->evm_saa9730_regs->InterruptEnable1)); + printk("lp->lan_saa9730_regs->Ok2Use = %x\n", + INL(&lp->lan_saa9730_regs->Ok2Use)); + printk("lp->NextTxmBufferIndex = %x\n", lp->NextTxmBufferIndex); + printk("lp->NextTxmPacketIndex = %x\n", lp->NextTxmPacketIndex); + printk("lp->PendingTxmBufferIndex = %x\n", + lp->PendingTxmBufferIndex); + printk("lp->PendingTxmPacketIndex = %x\n", + lp->PendingTxmPacketIndex); + printk("lp->lan_saa9730_regs->LanDmaCtl = %x\n", + INL(&lp->lan_saa9730_regs->LanDmaCtl)); + printk("lp->lan_saa9730_regs->DmaStatus = %x\n", + INL(&lp->lan_saa9730_regs->DmaStatus)); + printk("lp->lan_saa9730_regs->CamCtl = %x\n", + INL(&lp->lan_saa9730_regs->CamCtl)); + printk("lp->lan_saa9730_regs->TxCtl = %x\n", + INL(&lp->lan_saa9730_regs->TxCtl)); + printk("lp->lan_saa9730_regs->TxStatus = %x\n", + INL(&lp->lan_saa9730_regs->TxStatus)); + printk("lp->lan_saa9730_regs->RxCtl = %x\n", + INL(&lp->lan_saa9730_regs->RxCtl)); + printk("lp->lan_saa9730_regs->RxStatus = %x\n", + 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 = %x\n", + INL(&lp->lan_saa9730_regs->CamData)); + } + printk("lp->stats.tx_packets = %lx\n", lp->stats.tx_packets); + printk("lp->stats.tx_errors = %lx\n", lp->stats.tx_errors); + printk("lp->stats.tx_aborted_errors = %lx\n", + lp->stats.tx_aborted_errors); + printk("lp->stats.tx_window_errors = %lx\n", + lp->stats.tx_window_errors); + printk("lp->stats.tx_carrier_errors = %lx\n", + lp->stats.tx_carrier_errors); + printk("lp->stats.tx_fifo_errors = %lx\n", + lp->stats.tx_fifo_errors); + printk("lp->stats.tx_heartbeat_errors = %lx\n", + lp->stats.tx_heartbeat_errors); + printk("lp->stats.collisions = %lx\n", lp->stats.collisions); + + printk("lp->stats.rx_packets = %lx\n", lp->stats.rx_packets); + printk("lp->stats.rx_errors = %lx\n", lp->stats.rx_errors); + printk("lp->stats.rx_dropped = %lx\n", lp->stats.rx_dropped); + printk("lp->stats.rx_crc_errors = %lx\n", lp->stats.rx_crc_errors); + printk("lp->stats.rx_frame_errors = %lx\n", + lp->stats.rx_frame_errors); + printk("lp->stats.rx_fifo_errors = %lx\n", + lp->stats.rx_fifo_errors); + printk("lp->stats.rx_length_errors = %lx\n", + lp->stats.rx_length_errors); + + printk("lp->lan_saa9730_regs->DebugPCIMasterAddr = %x\n", + INL(&lp->lan_saa9730_regs->DebugPCIMasterAddr)); + printk("lp->lan_saa9730_regs->DebugLanTxStateMachine = %x\n", + INL(&lp->lan_saa9730_regs->DebugLanTxStateMachine)); + printk("lp->lan_saa9730_regs->DebugLanRxStateMachine = %x\n", + INL(&lp->lan_saa9730_regs->DebugLanRxStateMachine)); + printk("lp->lan_saa9730_regs->DebugLanTxFifoPointers = %x\n", + INL(&lp->lan_saa9730_regs->DebugLanTxFifoPointers)); + printk("lp->lan_saa9730_regs->DebugLanRxFifoPointers = %x\n", + INL(&lp->lan_saa9730_regs->DebugLanRxFifoPointers)); + printk("lp->lan_saa9730_regs->DebugLanCtlStateMachine = %x\n", + 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); + + if (!buffer_start) + return -ENOMEM; + + /* + * 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: timeout\n"); + 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: timeout\n"); + 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: timeout\n"); + 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: timeout\n"); + 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 timeout\n"); + 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 interrupt\n"); + + /* 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 = %x\n", + 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 interrupt\n"); + + /* 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); + dev->last_rx = jiffies; + } + } else { + /* We got an error packet. */ + if (lan_saa9730_debug > 2) + printk + ("lan_saa9730_rx: We got an error packet = %x\n", + 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 irqreturn_t 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_interrupt\n"); + + /* 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 IRQ_HANDLED; +} + +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 %d\n", 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=%08x\n", + (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 = %x\n", + 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, reset\n", 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=%08x\n", (unsigned int) skb); + + skblen = skb->len; + + spin_lock_irqsave(&lp->lock, flags); + + len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen; + + if (lan_saa9730_write(lp, skb, skblen)) { + spin_unlock_irqrestore(&lp->lock, flags); + printk("Error when writing packet to controller: skb=%08x\n", + (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); + + spin_unlock_irqrestore(&lp->lock, 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 void __devexit saa9730_remove_one(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + + if (dev) { + unregister_netdev(dev); + + if (dev->priv) + kfree(dev->priv); + + free_netdev(dev); + pci_release_regions(pdev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + } +} + + +static int lan_saa9730_init(struct net_device *dev, int ioaddr, int irq) +{ + struct lan_saa9730_private *lp; + unsigned char ethernet_addr[6]; + int ret = 0; + + dev->open = lan_saa9730_open_fail; + + if (get_ethernet_addr(ethernet_addr)) + return -ENODEV; + + 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. + */ + /* + * XXX: that is obviously broken - kfree() won't be happy with us. + */ + lp = (struct lan_saa9730_private *) (((unsigned long) + kmalloc(sizeof(*lp) + 7, + GFP_DMA | GFP_KERNEL) + + 7) & ~7); + + if (!lp) + return -ENOMEM; + + 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. */ + /* FIXME: a leak */ + if ((ret = lan_saa9730_allocate_buffers(lp))) + goto out; + + /* Stop LAN controller. */ + if ((ret = lan_saa9730_stop(lp))) + goto out; + + /* Initialize CAM registers. */ + if ((ret = lan_saa9730_cam_init(dev))) + goto out; + + /* Initialize MII registers. */ + if ((ret = lan_saa9730_mii_init(lp))) + goto out; + + /* Initialize control registers. */ + if ((ret = lan_saa9730_control_init(lp))) + goto out; + + /* Load CAM registers. */ + if ((ret = lan_saa9730_cam_load(lp))) + goto out; + + /* Initialize DMA context registers. */ + if ((ret = lan_saa9730_dma_init(lp))) + goto out; + + spin_lock_init(&lp->lock); + + 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; + + ret = register_netdev(dev); + if (ret) + goto out; + return 0; + + out: + if (dev->priv) + kfree(dev->priv); + return ret; +} + + +static int __devinit saa9730_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct net_device *dev; + unsigned int pci_ioaddr; + int err; + + if (lan_saa9730_debug > 1) + printk("saa9730.c: PCI bios is present, checking for devices...\n"); + + err = -ENOMEM; + dev = alloc_etherdev(0); + if (!dev) + goto out; + + SET_MODULE_OWNER(dev); + + err = pci_enable_device(pdev); + if (err) { + printk(KERN_ERR "Cannot enable PCI device, aborting.\n"); + goto out1; + } + + err = pci_request_regions(pdev, DRV_MODULE_NAME); + if (err) { + printk(KERN_ERR "Cannot obtain PCI resources, aborting.\n"); + goto out2; + } + + 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); + + err = lan_saa9730_init(dev, pci_ioaddr, pci_irq_line); + if (err) { + printk("Lan init failed"); + goto out2; + } + + pci_set_drvdata(pdev, dev); + SET_NETDEV_DEV(dev, &pdev->dev); + return 0; + +out2: + pci_disable_device(pdev); +out1: + free_netdev(dev); +out: + return err; +} + + +static struct pci_driver saa9730_driver = { + .name = DRV_MODULE_NAME, + .id_table = saa9730_pci_tbl, + .probe = saa9730_init_one, + .remove = __devexit_p(saa9730_remove_one), +}; + + +static int __init saa9730_init(void) +{ + return pci_module_init(&saa9730_driver); +} + +static void __exit saa9730_cleanup(void) +{ + pci_unregister_driver(&saa9730_driver); +} + +module_init(saa9730_init); +module_exit(saa9730_cleanup); + + + +MODULE_LICENSE("GPL"); |