diff options
| -rw-r--r-- | drivers/net/pcnet.c | 730 |
1 files changed, 370 insertions, 360 deletions
diff --git a/drivers/net/pcnet.c b/drivers/net/pcnet.c index b5b4518..9ec7b83 100644 --- a/drivers/net/pcnet.c +++ b/drivers/net/pcnet.c @@ -30,7 +30,7 @@ #include <pci.h> #if 0 -#define PCNET_DEBUG_LEVEL 0 /* 0=off, 1=init, 2=rx/tx */ +#define PCNET_DEBUG_LEVEL 0 /* 0=off, 1=init, 2=rx/tx */ #endif #if PCNET_DEBUG_LEVEL > 0 @@ -70,42 +70,42 @@ /* The PCNET Rx and Tx ring descriptors. */ struct pcnet_rx_head { - u32 base; - s16 buf_length; - s16 status; - u32 msg_length; - u32 reserved; + u32 base; + s16 buf_length; + s16 status; + u32 msg_length; + u32 reserved; }; struct pcnet_tx_head { - u32 base; - s16 length; - s16 status; - u32 misc; - u32 reserved; + u32 base; + s16 length; + s16 status; + u32 misc; + u32 reserved; }; /* The PCNET 32-Bit initialization block, described in databook. */ struct pcnet_init_block { - u16 mode; - u16 tlen_rlen; - u8 phys_addr[6]; - u16 reserved; - u32 filter[2]; - /* Receive and transmit ring base, along with extra bits. */ - u32 rx_ring; - u32 tx_ring; - u32 reserved2; + u16 mode; + u16 tlen_rlen; + u8 phys_addr[6]; + u16 reserved; + u32 filter[2]; + /* Receive and transmit ring base, along with extra bits. */ + u32 rx_ring; + u32 tx_ring; + u32 reserved2; }; typedef struct pcnet_priv { - struct pcnet_rx_head rx_ring[RX_RING_SIZE]; - struct pcnet_tx_head tx_ring[TX_RING_SIZE]; - struct pcnet_init_block init_block; - /* Receive Buffer space */ - unsigned char rx_buf[RX_RING_SIZE][PKT_BUF_SZ + 4]; - int cur_rx; - int cur_tx; + struct pcnet_rx_head rx_ring[RX_RING_SIZE]; + struct pcnet_tx_head tx_ring[TX_RING_SIZE]; + struct pcnet_init_block init_block; + /* Receive Buffer space */ + unsigned char rx_buf[RX_RING_SIZE][PKT_BUF_SZ + 4]; + int cur_rx; + int cur_tx; } pcnet_priv_t; static pcnet_priv_t *lp; @@ -118,412 +118,422 @@ static pcnet_priv_t *lp; static u16 pcnet_read_csr (struct eth_device *dev, int index) { - outw (index, dev->iobase+PCNET_RAP); - return inw (dev->iobase+PCNET_RDP); + outw (index, dev->iobase + PCNET_RAP); + return inw (dev->iobase + PCNET_RDP); } static void pcnet_write_csr (struct eth_device *dev, int index, u16 val) { - outw (index, dev->iobase+PCNET_RAP); - outw (val, dev->iobase+PCNET_RDP); + outw (index, dev->iobase + PCNET_RAP); + outw (val, dev->iobase + PCNET_RDP); } static u16 pcnet_read_bcr (struct eth_device *dev, int index) { - outw (index, dev->iobase+PCNET_RAP); - return inw (dev->iobase+PCNET_BDP); + outw (index, dev->iobase + PCNET_RAP); + return inw (dev->iobase + PCNET_BDP); } static void pcnet_write_bcr (struct eth_device *dev, int index, u16 val) { - outw (index, dev->iobase+PCNET_RAP); - outw (val, dev->iobase+PCNET_BDP); + outw (index, dev->iobase + PCNET_RAP); + outw (val, dev->iobase + PCNET_BDP); } static void pcnet_reset (struct eth_device *dev) { - inw (dev->iobase+PCNET_RESET); + inw (dev->iobase + PCNET_RESET); } static int pcnet_check (struct eth_device *dev) { - outw (88, dev->iobase+PCNET_RAP); - return (inw (dev->iobase+PCNET_RAP) == 88); + outw (88, dev->iobase + PCNET_RAP); + return (inw (dev->iobase + PCNET_RAP) == 88); } -static int pcnet_init( struct eth_device* dev, bd_t *bis); -static int pcnet_send (struct eth_device* dev, volatile void *packet, - int length); -static int pcnet_recv (struct eth_device* dev); -static void pcnet_halt (struct eth_device* dev); -static int pcnet_probe(struct eth_device* dev, bd_t *bis, int dev_num); +static int pcnet_init (struct eth_device *dev, bd_t * bis); +static int pcnet_send (struct eth_device *dev, volatile void *packet, + int length); +static int pcnet_recv (struct eth_device *dev); +static void pcnet_halt (struct eth_device *dev); +static int pcnet_probe (struct eth_device *dev, bd_t * bis, int dev_num); #define PCI_TO_MEM(d,a) pci_phys_to_mem((pci_dev_t)d->priv, (u_long)(a)) #define PCI_TO_MEM_LE(d,a) (u32)(cpu_to_le32(PCI_TO_MEM(d,a))) static struct pci_device_id supported[] = { - { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE }, - { } + {PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE}, + {} }; -int pcnet_initialize(bd_t *bis) +int pcnet_initialize (bd_t * bis) { - pci_dev_t devbusfn; - struct eth_device* dev; - u16 command, status; - int dev_nr = 0; - - PCNET_DEBUG1("\npcnet_initialize...\n"); - - for (dev_nr = 0; ; dev_nr++) { - - /* - * Find the PCnet PCI device(s). - */ - if ((devbusfn = pci_find_devices(supported, dev_nr)) < 0) { - break; + pci_dev_t devbusfn; + struct eth_device *dev; + u16 command, status; + int dev_nr = 0; + + PCNET_DEBUG1 ("\npcnet_initialize...\n"); + + for (dev_nr = 0;; dev_nr++) { + + /* + * Find the PCnet PCI device(s). + */ + if ((devbusfn = pci_find_devices (supported, dev_nr)) < 0) { + break; + } + + /* + * Allocate and pre-fill the device structure. + */ + dev = (struct eth_device *) malloc (sizeof *dev); + dev->priv = (void *) devbusfn; + sprintf (dev->name, "pcnet#%d", dev_nr); + + /* + * Setup the PCI device. + */ + pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0, + (unsigned int *) &dev->iobase); + dev->iobase &= ~0xf; + + PCNET_DEBUG1 ("%s: devbusfn=0x%x iobase=0x%x: ", + dev->name, devbusfn, dev->iobase); + + command = PCI_COMMAND_IO | PCI_COMMAND_MASTER; + pci_write_config_word (devbusfn, PCI_COMMAND, command); + pci_read_config_word (devbusfn, PCI_COMMAND, &status); + if ((status & command) != command) { + printf ("%s: Couldn't enable IO access or Bus Mastering\n", dev->name); + free (dev); + continue; + } + + pci_write_config_byte (devbusfn, PCI_LATENCY_TIMER, 0x40); + + /* + * Probe the PCnet chip. + */ + if (pcnet_probe (dev, bis, dev_nr) < 0) { + free (dev); + continue; + } + + /* + * Setup device structure and register the driver. + */ + dev->init = pcnet_init; + dev->halt = pcnet_halt; + dev->send = pcnet_send; + dev->recv = pcnet_recv; + + eth_register (dev); } - /* - * Allocate and pre-fill the device structure. - */ - dev = (struct eth_device*) malloc(sizeof *dev); - dev->priv = (void *)devbusfn; - sprintf(dev->name, "pcnet#%d", dev_nr); - - /* - * Setup the PCI device. - */ - pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_0, (unsigned int *)&dev->iobase); - dev->iobase &= ~0xf; - - PCNET_DEBUG1("%s: devbusfn=0x%x iobase=0x%x: ", - dev->name, devbusfn, dev->iobase); - - command = PCI_COMMAND_IO | PCI_COMMAND_MASTER; - pci_write_config_word(devbusfn, PCI_COMMAND, command); - pci_read_config_word(devbusfn, PCI_COMMAND, &status); - if ((status & command) != command) { - printf("%s: Couldn't enable IO access or Bus Mastering\n", - dev->name); - free(dev); - continue; - } - - pci_write_config_byte(devbusfn, PCI_LATENCY_TIMER, 0x40); - - /* - * Probe the PCnet chip. - */ - if (pcnet_probe(dev, bis, dev_nr) < 0) { - free(dev); - continue; - } - - /* - * Setup device structure and register the driver. - */ - dev->init = pcnet_init; - dev->halt = pcnet_halt; - dev->send = pcnet_send; - dev->recv = pcnet_recv; - - eth_register(dev); - } - - udelay(10 * 1000); + udelay (10 * 1000); - return dev_nr; + return dev_nr; } -static int pcnet_probe(struct eth_device* dev, bd_t *bis, int dev_nr) +static int pcnet_probe (struct eth_device *dev, bd_t * bis, int dev_nr) { - int chip_version; - char *chipname; + int chip_version; + char *chipname; + #ifdef PCNET_HAS_PROM - int i; + int i; #endif - /* Reset the PCnet controller */ - pcnet_reset(dev); - - /* Check if register access is working */ - if (pcnet_read_csr(dev, 0) != 4 || !pcnet_check(dev)) { - printf("%s: CSR register access check failed\n", dev->name); - return -1; - } - - /* Identify the chip */ - chip_version = pcnet_read_csr(dev, 88) | (pcnet_read_csr(dev,89) << 16); - if ((chip_version & 0xfff) != 0x003) - return -1; - chip_version = (chip_version >> 12) & 0xffff; - switch (chip_version) { - case 0x2621: - chipname = "PCnet/PCI II 79C970A"; /* PCI */ - break; + /* Reset the PCnet controller */ + pcnet_reset (dev); + + /* Check if register access is working */ + if (pcnet_read_csr (dev, 0) != 4 || !pcnet_check (dev)) { + printf ("%s: CSR register access check failed\n", dev->name); + return -1; + } + + /* Identify the chip */ + chip_version = + pcnet_read_csr (dev, 88) | (pcnet_read_csr (dev, 89) << 16); + if ((chip_version & 0xfff) != 0x003) + return -1; + chip_version = (chip_version >> 12) & 0xffff; + switch (chip_version) { + case 0x2621: + chipname = "PCnet/PCI II 79C970A"; /* PCI */ + break; #ifdef CONFIG_PCNET_79C973 - case 0x2625: - chipname = "PCnet/FAST III 79C973"; /* PCI */ - break; + case 0x2625: + chipname = "PCnet/FAST III 79C973"; /* PCI */ + break; #endif #ifdef CONFIG_PCNET_79C975 - case 0x2627: - chipname = "PCnet/FAST III 79C975"; /* PCI */ - break; + case 0x2627: + chipname = "PCnet/FAST III 79C975"; /* PCI */ + break; #endif - default: - printf("%s: PCnet version %#x not supported\n", - dev->name, chip_version); - return -1; - } + default: + printf ("%s: PCnet version %#x not supported\n", + dev->name, chip_version); + return -1; + } - PCNET_DEBUG1("AMD %s\n", chipname); + PCNET_DEBUG1 ("AMD %s\n", chipname); #ifdef PCNET_HAS_PROM - /* - * In most chips, after a chip reset, the ethernet address is read from - * the station address PROM at the base address and programmed into the - * "Physical Address Registers" CSR12-14. - */ - for (i = 0; i < 3; i++) { - unsigned int val; - val = pcnet_read_csr(dev, i+12) & 0x0ffff; - /* There may be endianness issues here. */ - dev->enetaddr[2*i ] = val & 0x0ff; - dev->enetaddr[2*i+1] = (val >> 8) & 0x0ff; - } + /* + * In most chips, after a chip reset, the ethernet address is read from + * the station address PROM at the base address and programmed into the + * "Physical Address Registers" CSR12-14. + */ + for (i = 0; i < 3; i++) { + unsigned int val; + + val = pcnet_read_csr (dev, i + 12) & 0x0ffff; + /* There may be endianness issues here. */ + dev->enetaddr[2 * i] = val & 0x0ff; + dev->enetaddr[2 * i + 1] = (val >> 8) & 0x0ff; + } #endif /* PCNET_HAS_PROM */ - return 0; + return 0; } -static int pcnet_init(struct eth_device* dev, bd_t *bis) +static int pcnet_init (struct eth_device *dev, bd_t * bis) { - int i, val; - u32 addr; + int i, val; + u32 addr; - PCNET_DEBUG1("%s: pcnet_init...\n", dev->name); + PCNET_DEBUG1 ("%s: pcnet_init...\n", dev->name); - /* Switch pcnet to 32bit mode */ - pcnet_write_bcr (dev, 20, 2); + /* Switch pcnet to 32bit mode */ + pcnet_write_bcr (dev, 20, 2); #ifdef CONFIG_PN62 - /* Setup LED registers */ - val = pcnet_read_bcr (dev, 2) | 0x1000; - pcnet_write_bcr (dev, 2, val); /* enable LEDPE */ - pcnet_write_bcr (dev, 4, 0x5080); /* 100MBit */ - pcnet_write_bcr (dev, 5, 0x40c0); /* LNKSE */ - pcnet_write_bcr (dev, 6, 0x4090); /* TX Activity */ - pcnet_write_bcr (dev, 7, 0x4084); /* RX Activity */ + /* Setup LED registers */ + val = pcnet_read_bcr (dev, 2) | 0x1000; + pcnet_write_bcr (dev, 2, val); /* enable LEDPE */ + pcnet_write_bcr (dev, 4, 0x5080); /* 100MBit */ + pcnet_write_bcr (dev, 5, 0x40c0); /* LNKSE */ + pcnet_write_bcr (dev, 6, 0x4090); /* TX Activity */ + pcnet_write_bcr (dev, 7, 0x4084); /* RX Activity */ #endif - /* Set/reset autoselect bit */ - val = pcnet_read_bcr (dev, 2) & ~2; - val |= 2; - pcnet_write_bcr (dev, 2, val); - - /* Enable auto negotiate, setup, disable fd */ - val = pcnet_read_bcr(dev, 32) & ~0x98; - val |= 0x20; - pcnet_write_bcr(dev, 32, val); - - /* - * We only maintain one structure because the drivers will never - * be used concurrently. In 32bit mode the RX and TX ring entries - * must be aligned on 16-byte boundaries. - */ - if (lp == NULL) { - addr = (u32)malloc(sizeof(pcnet_priv_t) + 0x10); - addr = (addr + 0xf) & ~0xf; - lp = (pcnet_priv_t *)addr; - } - - lp->init_block.mode = cpu_to_le16(0x0000); - lp->init_block.filter[0] = 0x00000000; - lp->init_block.filter[1] = 0x00000000; - - /* - * Initialize the Rx ring. - */ - lp->cur_rx = 0; - for (i = 0; i < RX_RING_SIZE; i++) { - lp->rx_ring[i].base = PCI_TO_MEM_LE(dev, lp->rx_buf[i]); - lp->rx_ring[i].buf_length = cpu_to_le16(-PKT_BUF_SZ); - lp->rx_ring[i].status = cpu_to_le16(0x8000); - PCNET_DEBUG1("Rx%d: base=0x%x buf_length=0x%hx status=0x%hx\n", - i, lp->rx_ring[i].base, lp->rx_ring[i].buf_length, - lp->rx_ring[i].status); - } - - /* - * Initialize the Tx ring. The Tx buffer address is filled in as - * needed, but we do need to clear the upper ownership bit. - */ - lp->cur_tx = 0; - for (i = 0; i < TX_RING_SIZE; i++) { - lp->tx_ring[i].base = 0; - lp->tx_ring[i].status = 0; - } - - /* - * Setup Init Block. - */ - PCNET_DEBUG1("Init block at 0x%p: MAC", &lp->init_block); - - for (i = 0; i < 6; i++) { - lp->init_block.phys_addr[i] = dev->enetaddr[i]; - PCNET_DEBUG1(" %02x", lp->init_block.phys_addr[i]); - } - - lp->init_block.tlen_rlen = cpu_to_le16(TX_RING_LEN_BITS | - RX_RING_LEN_BITS); - lp->init_block.rx_ring = PCI_TO_MEM_LE(dev, lp->rx_ring); - lp->init_block.tx_ring = PCI_TO_MEM_LE(dev, lp->tx_ring); - - PCNET_DEBUG1("\ntlen_rlen=0x%x rx_ring=0x%x tx_ring=0x%x\n", - lp->init_block.tlen_rlen, - lp->init_block.rx_ring, lp->init_block.tx_ring); - - /* - * Tell the controller where the Init Block is located. - */ - addr = PCI_TO_MEM(dev, &lp->init_block); - pcnet_write_csr(dev, 1, addr & 0xffff); - pcnet_write_csr(dev, 2, (addr >> 16) & 0xffff); - - pcnet_write_csr (dev, 4, 0x0915); - pcnet_write_csr (dev, 0, 0x0001); /* start */ - - /* Wait for Init Done bit */ - for (i = 10000; i > 0; i--) { - if (pcnet_read_csr (dev, 0) & 0x0100) - break; - udelay(10); - } - if (i <= 0) { - printf("%s: TIMEOUT: controller init failed\n", dev->name); - pcnet_reset (dev); - return -1; - } + /* Set/reset autoselect bit */ + val = pcnet_read_bcr (dev, 2) & ~2; + val |= 2; + pcnet_write_bcr (dev, 2, val); - /* - * Finally start network controller operation. - */ - pcnet_write_csr (dev, 0, 0x0002); + /* Enable auto negotiate, setup, disable fd */ + val = pcnet_read_bcr (dev, 32) & ~0x98; + val |= 0x20; + pcnet_write_bcr (dev, 32, val); - return 0; -} + /* + * We only maintain one structure because the drivers will never + * be used concurrently. In 32bit mode the RX and TX ring entries + * must be aligned on 16-byte boundaries. + */ + if (lp == NULL) { + addr = (u32) malloc (sizeof (pcnet_priv_t) + 0x10); + addr = (addr + 0xf) & ~0xf; + lp = (pcnet_priv_t *) addr; + } -static int pcnet_send(struct eth_device* dev, volatile void *packet, int pkt_len) -{ - int i, status; - struct pcnet_tx_head *entry = &lp->tx_ring[lp->cur_tx]; - - PCNET_DEBUG2("Tx%d: %d bytes from 0x%p ", lp->cur_tx, pkt_len, packet); - - /* Wait for completion by testing the OWN bit */ - for (i = 1000; i > 0; i--) { - status = le16_to_cpu(entry->status); - if ((status & 0x8000) == 0) - break; - udelay(100); - PCNET_DEBUG2("."); - } - if (i <= 0) { - printf("%s: TIMEOUT: Tx%d failed (status = 0x%x)\n", - dev->name, lp->cur_tx, status); - pkt_len = 0; - goto failure; - } - - /* - * Setup Tx ring. Caution: the write order is important here, - * set the status with the "ownership" bits last. - */ - status = 0x8300; - entry->length = le16_to_cpu(-pkt_len); - entry->misc = 0x00000000; - entry->base = PCI_TO_MEM_LE(dev, packet); - entry->status = le16_to_cpu(status); - - /* Trigger an immediate send poll. */ - pcnet_write_csr (dev, 0, 0x0008); - - failure: - if (++lp->cur_tx >= TX_RING_SIZE) + lp->init_block.mode = cpu_to_le16 (0x0000); + lp->init_block.filter[0] = 0x00000000; + lp->init_block.filter[1] = 0x00000000; + + /* + * Initialize the Rx ring. + */ + lp->cur_rx = 0; + for (i = 0; i < RX_RING_SIZE; i++) { + lp->rx_ring[i].base = PCI_TO_MEM_LE (dev, lp->rx_buf[i]); + lp->rx_ring[i].buf_length = cpu_to_le16 (-PKT_BUF_SZ); + lp->rx_ring[i].status = cpu_to_le16 (0x8000); + PCNET_DEBUG1 + ("Rx%d: base=0x%x buf_length=0x%hx status=0x%hx\n", i, + lp->rx_ring[i].base, lp->rx_ring[i].buf_length, + lp->rx_ring[i].status); + } + + /* + * Initialize the Tx ring. The Tx buffer address is filled in as + * needed, but we do need to clear the upper ownership bit. + */ lp->cur_tx = 0; + for (i = 0; i < TX_RING_SIZE; i++) { + lp->tx_ring[i].base = 0; + lp->tx_ring[i].status = 0; + } - PCNET_DEBUG2("done\n"); - return pkt_len; -} + /* + * Setup Init Block. + */ + PCNET_DEBUG1 ("Init block at 0x%p: MAC", &lp->init_block); -static int pcnet_recv(struct eth_device* dev) -{ - struct pcnet_rx_head *entry; - int pkt_len = 0; - u16 status; + for (i = 0; i < 6; i++) { + lp->init_block.phys_addr[i] = dev->enetaddr[i]; + PCNET_DEBUG1 (" %02x", lp->init_block.phys_addr[i]); + } + + lp->init_block.tlen_rlen = cpu_to_le16 (TX_RING_LEN_BITS | + RX_RING_LEN_BITS); + lp->init_block.rx_ring = PCI_TO_MEM_LE (dev, lp->rx_ring); + lp->init_block.tx_ring = PCI_TO_MEM_LE (dev, lp->tx_ring); + + PCNET_DEBUG1 ("\ntlen_rlen=0x%x rx_ring=0x%x tx_ring=0x%x\n", + lp->init_block.tlen_rlen, + lp->init_block.rx_ring, lp->init_block.tx_ring); - while (1) { - entry = &lp->rx_ring[lp->cur_rx]; /* - * If we own the next entry, it's a new packet. Send it up. + * Tell the controller where the Init Block is located. */ - if (((status = le16_to_cpu(entry->status)) & 0x8000) != 0) { - break; + addr = PCI_TO_MEM (dev, &lp->init_block); + pcnet_write_csr (dev, 1, addr & 0xffff); + pcnet_write_csr (dev, 2, (addr >> 16) & 0xffff); + + pcnet_write_csr (dev, 4, 0x0915); + pcnet_write_csr (dev, 0, 0x0001); /* start */ + + /* Wait for Init Done bit */ + for (i = 10000; i > 0; i--) { + if (pcnet_read_csr (dev, 0) & 0x0100) + break; + udelay (10); } - status >>= 8; - - if (status != 0x03) { /* There was an error. */ - - printf("%s: Rx%d", dev->name, lp->cur_rx); - PCNET_DEBUG1(" (status=0x%x)", status); - if (status & 0x20) printf(" Frame"); - if (status & 0x10) printf(" Overflow"); - if (status & 0x08) printf(" CRC"); - if (status & 0x04) printf(" Fifo"); - printf(" Error\n"); - entry->status &= le16_to_cpu(0x03ff); - - } else { - - pkt_len = (le32_to_cpu(entry->msg_length) & 0xfff) - 4; - if (pkt_len < 60) { - printf("%s: Rx%d: invalid packet length %d\n", - dev->name, lp->cur_rx, pkt_len); - } else { - NetReceive(lp->rx_buf[lp->cur_rx], pkt_len); - PCNET_DEBUG2("Rx%d: %d bytes from 0x%p\n", - lp->cur_rx, pkt_len, lp->rx_buf[lp->cur_rx]); - } + if (i <= 0) { + printf ("%s: TIMEOUT: controller init failed\n", dev->name); + pcnet_reset (dev); + return -1; } - entry->status |= cpu_to_le16(0x8000); - if (++lp->cur_rx >= RX_RING_SIZE) - lp->cur_rx = 0; - } - return pkt_len; + /* + * Finally start network controller operation. + */ + pcnet_write_csr (dev, 0, 0x0002); + + return 0; } -static void pcnet_halt(struct eth_device* dev) +static int pcnet_send (struct eth_device *dev, volatile void *packet, + int pkt_len) { - int i; - - PCNET_DEBUG1("%s: pcnet_halt...\n", dev->name); - - /* Reset the PCnet controller */ - pcnet_reset (dev); - - /* Wait for Stop bit */ - for (i = 1000; i > 0; i--) { - if (pcnet_read_csr (dev, 0) & 0x4) - break; - udelay(10); - } - if (i <= 0) { - printf("%s: TIMEOUT: controller reset failed\n", dev->name); - } + int i, status; + struct pcnet_tx_head *entry = &lp->tx_ring[lp->cur_tx]; + + PCNET_DEBUG2 ("Tx%d: %d bytes from 0x%p ", lp->cur_tx, pkt_len, + packet); + + /* Wait for completion by testing the OWN bit */ + for (i = 1000; i > 0; i--) { + status = le16_to_cpu (entry->status); + if ((status & 0x8000) == 0) + break; + udelay (100); + PCNET_DEBUG2 ("."); + } + if (i <= 0) { + printf ("%s: TIMEOUT: Tx%d failed (status = 0x%x)\n", + dev->name, lp->cur_tx, status); + pkt_len = 0; + goto failure; + } + + /* + * Setup Tx ring. Caution: the write order is important here, + * set the status with the "ownership" bits last. + */ + status = 0x8300; + entry->length = le16_to_cpu (-pkt_len); + entry->misc = 0x00000000; + entry->base = PCI_TO_MEM_LE (dev, packet); + entry->status = le16_to_cpu (status); + + /* Trigger an immediate send poll. */ + pcnet_write_csr (dev, 0, 0x0008); + + failure: + if (++lp->cur_tx >= TX_RING_SIZE) + lp->cur_tx = 0; + + PCNET_DEBUG2 ("done\n"); + return pkt_len; +} + +static int pcnet_recv (struct eth_device *dev) +{ + struct pcnet_rx_head *entry; + int pkt_len = 0; + u16 status; + + while (1) { + entry = &lp->rx_ring[lp->cur_rx]; + /* + * If we own the next entry, it's a new packet. Send it up. + */ + if (((status = le16_to_cpu (entry->status)) & 0x8000) != 0) { + break; + } + status >>= 8; + + if (status != 0x03) { /* There was an error. */ + + printf ("%s: Rx%d", dev->name, lp->cur_rx); + PCNET_DEBUG1 (" (status=0x%x)", status); + if (status & 0x20) + printf (" Frame"); + if (status & 0x10) + printf (" Overflow"); + if (status & 0x08) + printf (" CRC"); + if (status & 0x04) + printf (" Fifo"); + printf (" Error\n"); + entry->status &= le16_to_cpu (0x03ff); + + } else { + + pkt_len = + (le32_to_cpu (entry->msg_length) & 0xfff) - 4; + if (pkt_len < 60) { + printf ("%s: Rx%d: invalid packet length %d\n", dev->name, lp->cur_rx, pkt_len); + } else { + NetReceive (lp->rx_buf[lp->cur_rx], pkt_len); + PCNET_DEBUG2 ("Rx%d: %d bytes from 0x%p\n", + lp->cur_rx, pkt_len, + lp->rx_buf[lp->cur_rx]); + } + } + entry->status |= cpu_to_le16 (0x8000); + + if (++lp->cur_rx >= RX_RING_SIZE) + lp->cur_rx = 0; + } + return pkt_len; } +static void pcnet_halt (struct eth_device *dev) +{ + int i; + + PCNET_DEBUG1 ("%s: pcnet_halt...\n", dev->name); + + /* Reset the PCnet controller */ + pcnet_reset (dev); + + /* Wait for Stop bit */ + for (i = 1000; i > 0; i--) { + if (pcnet_read_csr (dev, 0) & 0x4) + break; + udelay (10); + } + if (i <= 0) { + printf ("%s: TIMEOUT: controller reset failed\n", dev->name); + } +} #endif |