diff options
Diffstat (limited to 'drivers/rtl8139.c')
| -rw-r--r-- | drivers/rtl8139.c | 56 |
1 files changed, 27 insertions, 29 deletions
diff --git a/drivers/rtl8139.c b/drivers/rtl8139.c index 5b14e71..b9e4a8d 100644 --- a/drivers/rtl8139.c +++ b/drivers/rtl8139.c @@ -44,7 +44,7 @@ which reserves the ranges 0x00000-0x10000 and 0x98000-0xA0000. My interpretation of this "reserved" is that Etherboot may do whatever it likes, as long as its environment is kept intact (like the BIOS - variables). Hopefully fixed rtl_poll() once and for all. The symptoms + variables). Hopefully fixed rtl_poll() once and for all. The symptoms were that if Etherboot was left at the boot menu for several minutes, the first eth_poll failed. Seems like I am the only person who does this. First of all I fixed the debugging code and then set out for a long bug @@ -53,18 +53,18 @@ driver and even the FreeBSD driver (what a piece of crap!) - and eventually spotted the nasty thing: the transmit routine was acknowledging each and every interrupt pending, including the RxOverrun and RxFIFIOver - interrupts. This confused the RTL8139 thoroughly. It destroyed the + interrupts. This confused the RTL8139 thoroughly. It destroyed the Rx ring contents by dumping the 2K FIFO contents right where we wanted to get the next packet. Oh well, what fun. - 18 Jan 2000 mdc@thinguin.org (Marty Connor) + 18 Jan 2000 mdc@thinguin.org (Marty Connor) Drastically simplified error handling. Basically, if any error in transmission or reception occurs, the card is reset. Also, pointed all transmit descriptors to the same buffer to - save buffer space. This should decrease driver size and avoid + save buffer space. This should decrease driver size and avoid corruption because of exceeding 32K during runtime. - 28 Jul 1999 (Matthias Meixner - meixner@rbg.informatik.tu-darmstadt.de) + 28 Jul 1999 (Matthias Meixner - meixner@rbg.informatik.tu-darmstadt.de) rtl_poll was quite broken: it used the RxOK interrupt flag instead of the RxBufferEmpty flag which often resulted in very bad transmission performace - below 1kBytes/s. @@ -77,10 +77,6 @@ #include <asm/io.h> #include <pci.h> -#ifdef __MIPS__ -static unsigned long mips_io_port_base = 0; -#endif - #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) && \ defined(CONFIG_RTL8139) @@ -95,11 +91,11 @@ static unsigned long mips_io_port_base = 0; /* PCI Tuning Parameters Threshold is bytes transferred to chip before transmission starts. */ -#define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */ -#define RX_FIFO_THRESH 4 /* Rx buffer level before first PCI xfer. */ -#define RX_DMA_BURST 4 /* Maximum PCI burst, '4' is 256 bytes */ -#define TX_DMA_BURST 4 /* Calculate as 16<<val. */ -#define NUM_TX_DESC 4 /* Number of Tx descriptor registers. */ +#define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */ +#define RX_FIFO_THRESH 4 /* Rx buffer level before first PCI xfer. */ +#define RX_DMA_BURST 4 /* Maximum PCI burst, '4' is 256 bytes */ +#define TX_DMA_BURST 4 /* Calculate as 16<<val. */ +#define NUM_TX_DESC 4 /* Number of Tx descriptor registers. */ #define TX_BUF_SIZE ETH_FRAME_LEN /* FCS is added by the chip */ #define RX_BUF_LEN_IDX 0 /* 0, 1, 2 is allowed - 8,16,32K rx buffer */ #define RX_BUF_LEN (8192 << RX_BUF_LEN_IDX) @@ -108,8 +104,8 @@ static unsigned long mips_io_port_base = 0; #undef DEBUG_RX #define currticks() get_timer(0) -#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) +#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) /* Symbolic offsets to registers. */ enum RTL8139_registers { @@ -276,12 +272,12 @@ static int rtl8139_probe(struct eth_device *dev, bd_t *bis) /* Serial EEPROM section. */ /* EEPROM_Ctrl bits. */ -#define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */ -#define EE_CS 0x08 /* EEPROM chip select. */ -#define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */ -#define EE_WRITE_0 0x00 -#define EE_WRITE_1 0x02 -#define EE_DATA_READ 0x01 /* EEPROM chip data out. */ +#define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */ +#define EE_CS 0x08 /* EEPROM chip select. */ +#define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */ +#define EE_WRITE_0 0x00 +#define EE_WRITE_1 0x02 +#define EE_DATA_READ 0x01 /* EEPROM chip data out. */ #define EE_ENB (0x80 | EE_CS) /* @@ -289,12 +285,12 @@ static int rtl8139_probe(struct eth_device *dev, bd_t *bis) No extra delay is needed with 33Mhz PCI, but 66Mhz may change this. */ -#define eeprom_delay() inl(ee_addr) +#define eeprom_delay() inl(ee_addr) /* The EEPROM commands include the alway-set leading bit. */ -#define EE_WRITE_CMD (5) -#define EE_READ_CMD (6) -#define EE_ERASE_CMD (7) +#define EE_WRITE_CMD (5) +#define EE_READ_CMD (6) +#define EE_ERASE_CMD (7) static int read_eeprom(int location, int addr_len) { @@ -390,7 +386,7 @@ static void rtl_reset(struct eth_device *dev) /* If we add multicast support, the MAR0 register would have to be * initialized to 0xffffffffffffffff (two 32 bit accesses). Etherboot - * only needs broadcast (for ARP/RARP/BOOTP/DHCP) and unicast. */ + * only needs broadcast (for ARP/RARP/BOOTP/DHCP) and unicast. */ outb(CmdRxEnb | CmdTxEnb, ioaddr + ChipCmd); @@ -436,7 +432,7 @@ static int rtl_transmit(struct eth_device *dev, volatile void *packet, int lengt status = inw(ioaddr + IntrStatus); /* Only acknlowledge interrupt sources we can properly handle * here - the RxOverflow/RxFIFOOver MUST be handled in the - * rtl_poll() function. */ + * rtl_poll() function. */ outw(status & (TxOK | TxErr | PCIErr), ioaddr + IntrStatus); if ((status & (TxOK | TxErr | PCIErr)) != 0) break; } while (currticks() < to); @@ -490,7 +486,7 @@ static int rtl_poll(struct eth_device *dev) if ((rx_status & (RxBadSymbol|RxRunt|RxTooLong|RxCRCErr|RxBadAlign)) || (rx_size < ETH_ZLEN) || (rx_size > ETH_FRAME_LEN + 4)) { printf("rx error %hX\n", rx_status); - rtl_reset(dev); /* this clears all interrupts still pending */ + rtl_reset(dev); /* this clears all interrupts still pending */ return 0; } @@ -527,6 +523,8 @@ static void rtl_disable(struct eth_device *dev) { int i; + ioaddr = dev->iobase; + /* reset the chip */ outb(CmdReset, ioaddr + ChipCmd); |