diff options
Diffstat (limited to 'drivers/natsemi.c')
| -rw-r--r-- | drivers/natsemi.c | 819 |
1 files changed, 0 insertions, 819 deletions
diff --git a/drivers/natsemi.c b/drivers/natsemi.c deleted file mode 100644 index f314d6771d..0000000000 --- a/drivers/natsemi.c +++ /dev/null @@ -1,819 +0,0 @@ -/* - natsemi.c: A U-Boot driver for the NatSemi DP8381x series. - Author: Mark A. Rakes (mark_rakes@vivato.net) - - Adapted from an Etherboot driver written by: - - Copyright (C) 2001 Entity Cyber, Inc. - - This development of this Etherboot driver was funded by - - Sicom Systems: http://www.sicompos.com/ - - Author: Marty Connor (mdc@thinguin.org) - Adapted from a Linux driver which was written by Donald Becker - - This software may be used and distributed according to the terms - of the GNU Public License (GPL), incorporated herein by reference. - - Original Copyright Notice: - - Written/copyright 1999-2001 by Donald Becker. - - This software may be used and distributed according to the terms of - the GNU General Public License (GPL), incorporated herein by reference. - Drivers based on or derived from this code fall under the GPL and must - retain the authorship, copyright and license notice. This file is not - a complete program and may only be used when the entire operating - system is licensed under the GPL. License for under other terms may be - available. Contact the original author for details. - - The original author may be reached as becker@scyld.com, or at - Scyld Computing Corporation - 410 Severn Ave., Suite 210 - Annapolis MD 21403 - - Support information and updates available at - http://www.scyld.com/network/netsemi.html - - References: - http://www.scyld.com/expert/100mbps.html - http://www.scyld.com/expert/NWay.html - Datasheet is available from: - http://www.national.com/pf/DP/DP83815.html -*/ - -/* Revision History - * October 2002 mar 1.0 - * Initial U-Boot Release. Tested with Netgear FA311 board - * and dp83815 chipset on custom board -*/ - -/* Includes */ -#include <common.h> -#include <malloc.h> -#include <net.h> -#include <asm/io.h> -#include <pci.h> - -#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) && \ - defined(CONFIG_NATSEMI) - -/* defines */ -#define EEPROM_SIZE 0xb /*12 16-bit chunks, or 24 bytes*/ - -#define DSIZE 0x00000FFF -#define ETH_ALEN 6 -#define CRC_SIZE 4 -#define TOUT_LOOP 500000 -#define TX_BUF_SIZE 1536 -#define RX_BUF_SIZE 1536 -#define NUM_RX_DESC 4 /* Number of Rx descriptor registers. */ - -/* Offsets to the device registers. - Unlike software-only systems, device drivers interact with complex hardware. - It's not useful to define symbolic names for every register bit in the - device. */ -enum register_offsets { - ChipCmd = 0x00, - ChipConfig = 0x04, - EECtrl = 0x08, - IntrMask = 0x14, - IntrEnable = 0x18, - TxRingPtr = 0x20, - TxConfig = 0x24, - RxRingPtr = 0x30, - RxConfig = 0x34, - ClkRun = 0x3C, - RxFilterAddr = 0x48, - RxFilterData = 0x4C, - SiliconRev = 0x58, - PCIPM = 0x44, - BasicControl = 0x80, - BasicStatus = 0x84, - /* These are from the spec, around page 78... on a separate table. */ - PGSEL = 0xCC, - PMDCSR = 0xE4, - TSTDAT = 0xFC, - DSPCFG = 0xF4, - SDCFG = 0x8C -}; - -/* Bit in ChipCmd. */ -enum ChipCmdBits { - ChipReset = 0x100, - RxReset = 0x20, - TxReset = 0x10, - RxOff = 0x08, - RxOn = 0x04, - TxOff = 0x02, - TxOn = 0x01 -}; - -enum ChipConfigBits { - LinkSts = 0x80000000, - HundSpeed = 0x40000000, - FullDuplex = 0x20000000, - TenPolarity = 0x10000000, - AnegDone = 0x08000000, - AnegEnBothBoth = 0x0000E000, - AnegDis100Full = 0x0000C000, - AnegEn100Both = 0x0000A000, - AnegDis100Half = 0x00008000, - AnegEnBothHalf = 0x00006000, - AnegDis10Full = 0x00004000, - AnegEn10Both = 0x00002000, - DuplexMask = 0x00008000, - SpeedMask = 0x00004000, - AnegMask = 0x00002000, - AnegDis10Half = 0x00000000, - ExtPhy = 0x00001000, - PhyRst = 0x00000400, - PhyDis = 0x00000200, - BootRomDisable = 0x00000004, - BEMode = 0x00000001, -}; - -enum TxConfig_bits { - TxDrthMask = 0x3f, - TxFlthMask = 0x3f00, - TxMxdmaMask = 0x700000, - TxMxdma_512 = 0x0, - TxMxdma_4 = 0x100000, - TxMxdma_8 = 0x200000, - TxMxdma_16 = 0x300000, - TxMxdma_32 = 0x400000, - TxMxdma_64 = 0x500000, - TxMxdma_128 = 0x600000, - TxMxdma_256 = 0x700000, - TxCollRetry = 0x800000, - TxAutoPad = 0x10000000, - TxMacLoop = 0x20000000, - TxHeartIgn = 0x40000000, - TxCarrierIgn = 0x80000000 -}; - -enum RxConfig_bits { - RxDrthMask = 0x3e, - RxMxdmaMask = 0x700000, - RxMxdma_512 = 0x0, - RxMxdma_4 = 0x100000, - RxMxdma_8 = 0x200000, - RxMxdma_16 = 0x300000, - RxMxdma_32 = 0x400000, - RxMxdma_64 = 0x500000, - RxMxdma_128 = 0x600000, - RxMxdma_256 = 0x700000, - RxAcceptLong = 0x8000000, - RxAcceptTx = 0x10000000, - RxAcceptRunt = 0x40000000, - RxAcceptErr = 0x80000000 -}; - -/* Bits in the RxMode register. */ -enum rx_mode_bits { - AcceptErr = 0x20, - AcceptRunt = 0x10, - AcceptBroadcast = 0xC0000000, - AcceptMulticast = 0x00200000, - AcceptAllMulticast = 0x20000000, - AcceptAllPhys = 0x10000000, - AcceptMyPhys = 0x08000000 -}; - -typedef struct _BufferDesc { - u32 link; - vu_long cmdsts; - u32 bufptr; - u32 software_use; -} BufferDesc; - -/* Bits in network_desc.status */ -enum desc_status_bits { - DescOwn = 0x80000000, DescMore = 0x40000000, DescIntr = 0x20000000, - DescNoCRC = 0x10000000, DescPktOK = 0x08000000, - DescSizeMask = 0xfff, - - DescTxAbort = 0x04000000, DescTxFIFO = 0x02000000, - DescTxCarrier = 0x01000000, DescTxDefer = 0x00800000, - DescTxExcDefer = 0x00400000, DescTxOOWCol = 0x00200000, - DescTxExcColl = 0x00100000, DescTxCollCount = 0x000f0000, - - DescRxAbort = 0x04000000, DescRxOver = 0x02000000, - DescRxDest = 0x01800000, DescRxLong = 0x00400000, - DescRxRunt = 0x00200000, DescRxInvalid = 0x00100000, - DescRxCRC = 0x00080000, DescRxAlign = 0x00040000, - DescRxLoop = 0x00020000, DesRxColl = 0x00010000, -}; - -/* Globals */ -#ifdef NATSEMI_DEBUG -static int natsemi_debug = 0; /* 1 verbose debugging, 0 normal */ -#endif -static u32 SavedClkRun; -static unsigned int cur_rx; -static unsigned int advertising; -static unsigned int rx_config; -static unsigned int tx_config; - -/* Note: transmit and receive buffers and descriptors must be - longword aligned */ -static BufferDesc txd __attribute__ ((aligned(4))); -static BufferDesc rxd[NUM_RX_DESC] __attribute__ ((aligned(4))); - -static unsigned char txb[TX_BUF_SIZE] __attribute__ ((aligned(4))); -static unsigned char rxb[NUM_RX_DESC * RX_BUF_SIZE] - __attribute__ ((aligned(4))); - -/* Function Prototypes */ -static int read_eeprom(struct eth_device *dev, long addr, int location); -static int mdio_read(struct eth_device *dev, int phy_id, int location); -static int natsemi_init(struct eth_device *dev, bd_t * bis); -static void natsemi_reset(struct eth_device *dev); -static void natsemi_init_rxfilter(struct eth_device *dev); -static void natsemi_init_txd(struct eth_device *dev); -static void natsemi_init_rxd(struct eth_device *dev); -static void natsemi_set_rx_mode(struct eth_device *dev); -static void natsemi_check_duplex(struct eth_device *dev); -static int natsemi_send(struct eth_device *dev, volatile void *packet, - int length); -static int natsemi_poll(struct eth_device *dev); -static void natsemi_disable(struct eth_device *dev); - -static struct pci_device_id supported[] = { - {PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83815}, - {} -}; - -#define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a) -#define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a) - -static inline int -INW(struct eth_device *dev, u_long addr) -{ - return le16_to_cpu(*(vu_short *) (addr + dev->iobase)); -} - -static int -INL(struct eth_device *dev, u_long addr) -{ - return le32_to_cpu(*(vu_long *) (addr + dev->iobase)); -} - -static inline void -OUTW(struct eth_device *dev, int command, u_long addr) -{ - *(vu_short *) ((addr + dev->iobase)) = cpu_to_le16(command); -} - -static inline void -OUTL(struct eth_device *dev, int command, u_long addr) -{ - *(vu_long *) ((addr + dev->iobase)) = cpu_to_le32(command); -} - -/* - * Function: natsemi_initialize - * - * Description: Retrieves the MAC address of the card, and sets up some - * globals required by other routines, and initializes the NIC, making it - * ready to send and receive packets. - * - * Side effects: - * leaves the natsemi initialized, and ready to recieve packets. - * - * Returns: struct eth_device *: pointer to NIC data structure - */ - -int -natsemi_initialize(bd_t * bis) -{ - pci_dev_t devno; - int card_number = 0; - struct eth_device *dev; - u32 iobase, status, chip_config; - int i, idx = 0; - int prev_eedata; - u32 tmp; - - while (1) { - /* Find PCI device(s) */ - if ((devno = pci_find_devices(supported, idx++)) < 0) { - break; - } - - pci_read_config_dword(devno, PCI_BASE_ADDRESS_0, &iobase); - iobase &= ~0x3; /* bit 1: unused and bit 0: I/O Space Indicator */ - - pci_write_config_dword(devno, PCI_COMMAND, - PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); - - /* Check if I/O accesses and Bus Mastering are enabled. */ - pci_read_config_dword(devno, PCI_COMMAND, &status); - if (!(status & PCI_COMMAND_MEMORY)) { - printf("Error: Can not enable MEM access.\n"); - continue; - } else if (!(status & PCI_COMMAND_MASTER)) { - printf("Error: Can not enable Bus Mastering.\n"); - continue; - } - - dev = (struct eth_device *) malloc(sizeof *dev); - - sprintf(dev->name, "dp83815#%d", card_number); - dev->iobase = bus_to_phys(iobase); -#ifdef NATSEMI_DEBUG - printf("natsemi: NatSemi ns8381[56] @ %#x\n", dev->iobase); -#endif - dev->priv = (void *) devno; - dev->init = natsemi_init; - dev->halt = natsemi_disable; - dev->send = natsemi_send; - dev->recv = natsemi_poll; - - eth_register(dev); - - card_number++; - - /* Set the latency timer for value. */ - pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x20); - - udelay(10 * 1000); - - /* natsemi has a non-standard PM control register - * in PCI config space. Some boards apparently need - * to be brought to D0 in this manner. */ - pci_read_config_dword(devno, PCIPM, &tmp); - if (tmp & (0x03 | 0x100)) { - /* D0 state, disable PME assertion */ - u32 newtmp = tmp & ~(0x03 | 0x100); - pci_write_config_dword(devno, PCIPM, newtmp); - } - - printf("natsemi: EEPROM contents:\n"); - for (i = 0; i <= EEPROM_SIZE; i++) { - short eedata = read_eeprom(dev, EECtrl, i); - printf(" %04hx", eedata); - } - printf("\n"); - - /* get MAC address */ - prev_eedata = read_eeprom(dev, EECtrl, 6); - for (i = 0; i < 3; i++) { - int eedata = read_eeprom(dev, EECtrl, i + 7); - dev->enetaddr[i*2] = (eedata << 1) + (prev_eedata >> 15); - dev->enetaddr[i*2+1] = eedata >> 7; - prev_eedata = eedata; - } - - /* Reset the chip to erase any previous misconfiguration. */ - OUTL(dev, ChipReset, ChipCmd); - - advertising = mdio_read(dev, 1, 4); - chip_config = INL(dev, ChipConfig); -#ifdef NATSEMI_DEBUG - printf("%s: Transceiver status %#08X advertising %#08X\n", - dev->name, (int) INL(dev, BasicStatus), advertising); - printf("%s: Transceiver default autoneg. %s 10%s %s duplex.\n", - dev->name, chip_config & AnegMask ? "enabled, advertise" : - "disabled, force", chip_config & SpeedMask ? "0" : "", - chip_config & DuplexMask ? "full" : "half"); -#endif - chip_config |= AnegEnBothBoth; -#ifdef NATSEMI_DEBUG - printf("%s: changed to autoneg. %s 10%s %s duplex.\n", - dev->name, chip_config & AnegMask ? "enabled, advertise" : - "disabled, force", chip_config & SpeedMask ? "0" : "", - chip_config & DuplexMask ? "full" : "half"); -#endif - /*write new autoneg bits, reset phy*/ - OUTL(dev, (chip_config | PhyRst), ChipConfig); - /*un-reset phy*/ - OUTL(dev, chip_config, ChipConfig); - - /* Disable PME: - * The PME bit is initialized from the EEPROM contents. - * PCI cards probably have PME disabled, but motherboard - * implementations may have PME set to enable WakeOnLan. - * With PME set the chip will scan incoming packets but - * nothing will be written to memory. */ - SavedClkRun = INL(dev, ClkRun); - OUTL(dev, SavedClkRun & ~0x100, ClkRun); - } - return card_number; -} - -/* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. - The EEPROM code is for common 93c06/46 EEPROMs w/ 6bit addresses. */ - -/* Delay between EEPROM clock transitions. - No extra delay is needed with 33Mhz PCI, but future 66Mhz - access may need a delay. */ -#define eeprom_delay(ee_addr) INL(dev, ee_addr) - -enum EEPROM_Ctrl_Bits { - EE_ShiftClk = 0x04, - EE_DataIn = 0x01, - EE_ChipSelect = 0x08, - EE_DataOut = 0x02 -}; - -#define EE_Write0 (EE_ChipSelect) -#define EE_Write1 (EE_ChipSelect | EE_DataIn) -/* The EEPROM commands include the alway-set leading bit. */ -enum EEPROM_Cmds { - EE_WrEnCmd = (4 << 6), EE_WriteCmd = (5 << 6), - EE_ReadCmd = (6 << 6), EE_EraseCmd = (7 << 6), -}; - - -static int -read_eeprom(struct eth_device *dev, long addr, int location) -{ - int i; - int retval = 0; - int ee_addr = (typeof(ee_addr))addr; - int read_cmd = location | EE_ReadCmd; - - OUTL(dev, EE_Write0, ee_addr); - - /* Shift the read command bits out. */ - for (i = 10; i >= 0; i--) { - short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0; - OUTL(dev, dataval, ee_addr); - eeprom_delay(ee_addr); - OUTL(dev, dataval | EE_ShiftClk, ee_addr); - eeprom_delay(ee_addr); - } - OUTL(dev, EE_ChipSelect, ee_addr); - eeprom_delay(ee_addr); - - for (i = 0; i < 16; i++) { - OUTL(dev, EE_ChipSelect | EE_ShiftClk, ee_addr); - eeprom_delay(ee_addr); - retval |= (INL(dev, ee_addr) & EE_DataOut) ? 1 << i : 0; - OUTL(dev, EE_ChipSelect, ee_addr); - eeprom_delay(ee_addr); - } - - /* Terminate the EEPROM access. */ - OUTL(dev, EE_Write0, ee_addr); - OUTL(dev, 0, ee_addr); -#ifdef NATSEMI_DEBUG - if (natsemi_debug) - printf("read_eeprom: %08x, %08x, retval %08x\n", - dev->iobase + ee_addr, read_cmd, retval); -#endif - return retval; -} - -/* MII transceiver control section. - The 83815 series has an internal transceiver, and we present the - management registers as if they were MII connected. */ - -static int -mdio_read(struct eth_device *dev, int phy_id, int location) -{ - if (phy_id == 1 && location < 32) - return INL(dev, BasicControl+(location<<2))&0xffff; - else - return 0xffff; -} - -/* Function: natsemi_init - * - * Description: resets the ethernet controller chip and configures - * registers and data structures required for sending and receiving packets. - * - * Arguments: struct eth_device *dev: NIC data structure - * - * returns: int. - */ - -static int -natsemi_init(struct eth_device *dev, bd_t * bis) -{ - - natsemi_reset(dev); - - /* Disable PME: - * The PME bit is initialized from the EEPROM contents. - * PCI cards probably have PME disabled, but motherboard - * implementations may have PME set to enable WakeOnLan. - * With PME set the chip will scan incoming packets but - * nothing will be written to memory. */ - OUTL(dev, SavedClkRun & ~0x100, ClkRun); - - natsemi_init_rxfilter(dev); - natsemi_init_txd(dev); - natsemi_init_rxd(dev); - - /* Configure the PCI bus bursts and FIFO thresholds. */ - tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 | (0x1002); - rx_config = RxMxdma_256 | 0x20; - -#ifdef NATSEMI_DEBUG - printf("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config); - printf("%s: Setting RxConfig Register %#08X\n", dev->name, rx_config); -#endif - OUTL(dev, tx_config, TxConfig); - OUTL(dev, rx_config, RxConfig); - - natsemi_check_duplex(dev); - natsemi_set_rx_mode(dev); - - OUTL(dev, (RxOn | TxOn), ChipCmd); - return 1; -} - -/* - * Function: natsemi_reset - * - * Description: soft resets the controller chip - * - * Arguments: struct eth_device *dev: NIC data structure - * - * Returns: void. - */ -static void -natsemi_reset(struct eth_device *dev) -{ - OUTL(dev, ChipReset, ChipCmd); - - /* On page 78 of the spec, they recommend some settings for "optimum - performance" to be done in sequence. These settings optimize some - of the 100Mbit autodetection circuitry. Also, we only want to do - this for rev C of the chip. */ - if (INL(dev, SiliconRev) == 0x302) { - OUTW(dev, 0x0001, PGSEL); - OUTW(dev, 0x189C, PMDCSR); - OUTW(dev, 0x0000, TSTDAT); - OUTW(dev, 0x5040, DSPCFG); - OUTW(dev, 0x008C, SDCFG); - } - /* Disable interrupts using the mask. */ - OUTL(dev, 0, IntrMask); - OUTL(dev, 0, IntrEnable); -} - -/* Function: natsemi_init_rxfilter - * - * Description: sets receive filter address to our MAC address - * - * Arguments: struct eth_device *dev: NIC data structure - * - * returns: void. - */ - -static void -natsemi_init_rxfilter(struct eth_device *dev) -{ - int i; - - for (i = 0; i < ETH_ALEN; i += 2) { - OUTL(dev, i, RxFilterAddr); - OUTW(dev, dev->enetaddr[i] + (dev->enetaddr[i + 1] << 8), - RxFilterData); - } -} - -/* - * Function: natsemi_init_txd - * - * Description: initializes the Tx descriptor - * - * Arguments: struct eth_device *dev: NIC data structure - * - * returns: void. - */ - -static void -natsemi_init_txd(struct eth_device *dev) -{ - txd.link = (u32) 0; - txd.cmdsts = (u32) 0; - txd.bufptr = (u32) & txb[0]; - - /* load Transmit Descriptor Register */ - OUTL(dev, (u32) & txd, TxRingPtr); -#ifdef NATSEMI_DEBUG - printf("natsemi_init_txd: TX descriptor reg loaded with: %#08X\n", - INL(dev, TxRingPtr)); -#endif -} - -/* Function: natsemi_init_rxd - * - * Description: initializes the Rx descriptor ring - * - * Arguments: struct eth_device *dev: NIC data structure - * - * Returns: void. - */ - -static void -natsemi_init_rxd(struct eth_device *dev) -{ - int i; - - cur_rx = 0; - - /* init RX descriptor */ - for (i = 0; i < NUM_RX_DESC; i++) { - rxd[i].link = - cpu_to_le32((i + 1 < - NUM_RX_DESC) ? (u32) & rxd[i + - 1] : (u32) & - rxd[0]); - rxd[i].cmdsts = cpu_to_le32((u32) RX_BUF_SIZE); - rxd[i].bufptr = cpu_to_le32((u32) & rxb[i * RX_BUF_SIZE]); -#ifdef NATSEMI_DEBUG - printf - ("natsemi_init_rxd: rxd[%d]=%p link=%X cmdsts=%lX bufptr=%X\n", - i, &rxd[i], le32_to_cpu(rxd[i].link), - rxd[i].cmdsts, rxd[i].bufptr); -#endif - } - - /* load Receive Descriptor Register */ - OUTL(dev, (u32) & rxd[0], RxRingPtr); - -#ifdef NATSEMI_DEBUG - printf("natsemi_init_rxd: RX descriptor register loaded with: %X\n", - INL(dev, RxRingPtr)); -#endif -} - -/* Function: natsemi_set_rx_mode - * - * Description: - * sets the receive mode to accept all broadcast packets and packets - * with our MAC address, and reject all multicast packets. - * - * Arguments: struct eth_device *dev: NIC data structure - * - * Returns: void. - */ - -static void -natsemi_set_rx_mode(struct eth_device *dev) -{ - u32 rx_mode = AcceptBroadcast | AcceptMyPhys; - - OUTL(dev, rx_mode, RxFilterAddr); -} - -static void -natsemi_check_duplex(struct eth_device *dev) -{ - int duplex = INL(dev, ChipConfig) & FullDuplex ? 1 : 0; - -#ifdef NATSEMI_DEBUG - printf("%s: Setting %s-duplex based on negotiated link" - " capability.\n", dev->name, duplex ? "full" : "half"); -#endif - if (duplex) { - rx_config |= RxAcceptTx; - tx_config |= (TxCarrierIgn | TxHeartIgn); - } else { - rx_config &= ~RxAcceptTx; - tx_config &= ~(TxCarrierIgn | TxHeartIgn); - } - OUTL(dev, tx_config, TxConfig); - OUTL(dev, rx_config, RxConfig); -} - -/* Function: natsemi_send - * - * Description: transmits a packet and waits for completion or timeout. - * - * Returns: void. */ -static int -natsemi_send(struct eth_device *dev, volatile void *packet, int length) -{ - u32 i, status = 0; - u32 tx_status = 0; - vu_long *res = (vu_long *)&tx_status; - - /* Stop the transmitter */ - OUTL(dev, TxOff, ChipCmd); - -#ifdef NATSEMI_DEBUG - if (natsemi_debug) - printf("natsemi_send: sending %d bytes\n", (int) length); -#endif - - /* set the transmit buffer descriptor and enable Transmit State Machine */ - txd.link = cpu_to_le32(0); - txd.bufptr = cpu_to_le32(phys_to_bus((u32) packet)); - txd.cmdsts = cpu_to_le32(DescOwn | length); - - /* load Transmit Descriptor Register */ - OUTL(dev, phys_to_bus((u32) & txd), TxRingPtr); -#ifdef NATSEMI_DEBUG - if (natsemi_debug) - printf("natsemi_send: TX descriptor register loaded with: %#08X\n", - INL(dev, TxRingPtr)); -#endif - /* restart the transmitter */ - OUTL(dev, TxOn, ChipCmd); - - for (i = 0; - (*res = le32_to_cpu(txd.cmdsts)) & DescOwn; - i++) { - if (i >= TOUT_LOOP) { - printf - ("%s: tx error buffer not ready: txd.cmdsts == %#X\n", - dev->name, tx_status); - goto Done; - } - } - - if (!(tx_status & DescPktOK)) { - printf("natsemi_send: Transmit error, Tx status %X.\n", - tx_status); - goto Done; - } - - status = 1; - Done: - return status; -} - -/* Function: natsemi_poll - * - * Description: checks for a received packet and returns it if found. - * - * Arguments: struct eth_device *dev: NIC data structure - * - * Returns: 1 if packet was received. - * 0 if no packet was received. - * - * Side effects: - * Returns (copies) the packet to the array dev->packet. - * Returns the length of the packet. - */ - -static int -natsemi_poll(struct eth_device *dev) -{ - int retstat = 0; - int length = 0; - u32 rx_status = le32_to_cpu(rxd[cur_rx].cmdsts); - - if (!(rx_status & (u32) DescOwn)) - return retstat; -#ifdef NATSEMI_DEBUG - if (natsemi_debug) - printf("natsemi_poll: got a packet: cur_rx:%d, status:%X\n", - cur_rx, rx_status); -#endif - length = (rx_status & DSIZE) - CRC_SIZE; - - if ((rx_status & (DescMore | DescPktOK | DescRxLong)) != DescPktOK) { - printf - ("natsemi_poll: Corrupted packet received, buffer status = %X\n", - rx_status); - retstat = 0; - } else { /* give packet to higher level routine */ - NetReceive((rxb + cur_rx * RX_BUF_SIZE), length); - retstat = 1; - } - - /* return the descriptor and buffer to receive ring */ - rxd[cur_rx].cmdsts = cpu_to_le32(RX_BUF_SIZE); - rxd[cur_rx].bufptr = cpu_to_le32((u32) & rxb[cur_rx * RX_BUF_SIZE]); - - if (++cur_rx == NUM_RX_DESC) - cur_rx = 0; - - /* re-enable the potentially idle receive state machine */ - OUTL(dev, RxOn, ChipCmd); - - return retstat; -} - -/* Function: natsemi_disable - * - * Description: Turns off interrupts and stops Tx and Rx engines - * - * Arguments: struct eth_device *dev: NIC data structure - * - * Returns: void. - */ - -static void -natsemi_disable(struct eth_device *dev) -{ - /* Disable interrupts using the mask. */ - OUTL(dev, 0, IntrMask); - OUTL(dev, 0, IntrEnable); - - /* Stop the chip's Tx and Rx processes. */ - OUTL(dev, RxOff | TxOff, ChipCmd); - - /* Restore PME enable bit */ - OUTL(dev, SavedClkRun, ClkRun); -} - -#endif |