| /* fa31x.c -- NETGEAR FA311/FA312 PCI Adapter Driver */ /* fa31x.c: Version 2.20 07/16/2001 * * NETGEAR FA311/FA312 PCI Adaper Driver for Linux * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that 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. */ static const char *version = "fa31x.c: NETGEAR FA311/FA312 PCI Adapter v2.20\n"; /* Generic Kernel Module/Driver Headers */ #ifdef MODVERSIONS #include #endif #include #include #include #include #include #include #include /* Ethernet Driver Specific Headers */ #include #include #include #include #include #include "fa31x.h" /* Macros */ /* * SWAP_BUS_TO_CPU_XX and SWAP_CPU_TO_BUS_XX macros swap 16 and 32 bit values * between the PCI bus' little endian byte-order and the CPU's native * byte-order. */ #ifdef __BIG_ENDIAN #define BUS_TO_CPU_SWAP_16(X) swap_16(X) #define BUS_TO_CPU_SWAP_32(X) swap_32(X) #define CPU_TO_BUS_SWAP_16(X) swap_16(X) #define CPU_TO_BUS_SWAP_32(X) swap_32(X) #define CPU_TO_NET_SWAP_16(X) ((u16)(X)) #define CPU_TO_NET_SWAP_32(X) ((u32)(X)) #define NET_TO_CPU_SWAP_16(X) ((u16)(X)) #define NET_TO_CPU_SWAP_32(X) ((u32)(X)) #else #define BUS_TO_CPU_SWAP_32(X) ((u32)(X)) #define BUS_TO_CPU_SWAP_16(X) ((u16)(X)) #define CPU_TO_BUS_SWAP_32(X) ((u32)(X)) #define CPU_TO_BUS_SWAP_16(X) ((u16)(X)) #define CPU_TO_NET_SWAP_16(X) swap_16(X) #define CPU_TO_NET_SWAP_32(X) swap_32(X) #define NET_TO_CPU_SWAP_16(X) swap_16(X) #define NET_TO_CPU_SWAP_32(X) swap_32(X) #endif /* Macros translate addresses between PCI bus and CPU */ #define BUS_TO_CPU_ADDR_XLATE(X) BUS_TO_CPU_SWAP_32(bus_to_virt(X)) #define CPU_TO_BUS_ADDR_XLATE(X) CPU_TO_BUS_SWAP_32(virt_to_bus(X)) /* Macros to read/write 32/16 bit data to/from FA311/FA312 device registers. */ #define DP_REG32_WRITE(reg, val) io_write_32 (iobase+(reg), \ CPU_TO_BUS_SWAP_32(val)) #define DP_REG32_READ(reg) BUS_TO_CPU_SWAP_32(io_read_32 (iobase+(reg))) #define DP_REG16_WRITE(reg, val) io_write_16 (iobase+(reg), \ CPU_TO_BUS_SWAP_16(val)) #define DP_REG16_READ(reg) BUS_TO_CPU_SWAP_16(io_read_16 (iobase+(reg))) #define DP_REG32_SET(reg, val) DP_REG32_WRITE(reg,DP_REG32_READ(reg)|(val)) #define DP_REG32_CLR(reg, val) DP_REG32_WRITE(reg,DP_REG32_READ(reg)&~(val)) #define DP_REG16_SET(reg, val) DP_REG16_WRITE(reg,DP_REG16_READ(reg)|(val)) #define DP_REG16_CLR(reg, val) DP_REG16_WRITE(reg,DP_REG16_READ(reg)&~(val)) /* Debug Macros */ #define DP_DEBUG_PROBE 0x00000001 #define DP_DEBUG_OPEN 0x00000002 #define DP_DEBUG_CLOSE 0x00000004 #define DP_DEBUG_IOCTL 0x00000008 #define DP_DEBUG_TX 0x00000010 #define DP_DEBUG_RX 0x00000020 #define DP_DEBUG_MC 0x00000040 #define DP_DEBUG_ANEG 0x00000080 #define DP_DEBUG_INTR 0x00000100 #define DP_DEBUG_LOAD 0x00000200 #define DP_DEBUG_UNLOAD 0x00000400 #ifdef DEBUG u32 dp_debug_level=DEBUG; #define DP_DEBUG(level, X) if (level & dp_debug_level) printk X #else #define DP_DEBUG(level, X) #endif /* data types */ typedef u32 status; /* return status */ typedef volatile u8 * virt_addr; /* CPU virtual address */ typedef volatile u8 * bus_addr; /* BUS physical address */ typedef u8 bool; #define OK 0 /* status: OK */ #define ERROR -1 /* status: ERROR */ #define TRUE 1 #define FALSE 0 /* Default Driver Parameters */ #define DP_DEFAULT_TXQ_SIZE 10 #define DP_DEFAULT_RXQ_SIZE 30 #define DP_RX_COPY_THRESHOLD 128 /* upper limit for rx packet copy */ #define DP_POLYNOMIAL 0x04C11DB6 /* Alignment and packet sizes */ #define ETH_CRC_LEN 4 #define ETH_MAX_PKT_SIZE (ETH_FRAME_LEN + ETH_CRC_LEN) #define DP_ALIGN 4 /* word alignment */ /* Driver private descriptor macros */ #define DP_DESC_SKBPTR 0x0c /* SKB pointer offset */ #define DP_QUEUE_ELE_SIZE (DP_DESC_SIZE + 4) #define DP_QUEUE_ELE_NEXT(q) \ q->cur_desc_addr = DP_QUEUE_ELE_NEXT_GET(q, q->cur_desc_addr) #define DP_QUEUE_ELE_NEXT_GET(q, desc_addr) \ ((desc_addr) == (q)->last_desc_addr) ? (q)->first_desc_addr : \ (desc_addr) + DP_QUEUE_ELE_SIZE /* Macros to get/set the values of the descriptor fields */ #define DP_DESC_LNK_GET(ptr) *(u32 *)((virt_addr)ptr + DP_DESC_LNK) #define DP_DESC_CMDSTS_GET(ptr) *(u32 *)((virt_addr)ptr + DP_DESC_CMDSTS) #define DP_DESC_BUFPTR_GET(ptr) *(u32 *)((virt_addr)ptr + DP_DESC_BUFPTR) #define DP_DESC_SKBPTR_GET(ptr) *(u32 *)((virt_addr)ptr + DP_DESC_SKBPTR) #define DP_DESC_LNK_SET(ptr, val) DP_DESC_LNK_GET(ptr) = (val) #define DP_DESC_CMDSTS_SET(ptr, val) DP_DESC_CMDSTS_GET(ptr) = (val) #define DP_DESC_BUFPTR_SET(ptr,val) DP_DESC_BUFPTR_GET(ptr) = (val) #define DP_DESC_SKBPTR_SET(ptr,val) DP_DESC_SKBPTR_GET(ptr) = (val) /* * Macros to get/set the values of descriptor fields with * appropriate address and byte order translations */ #define DP_DESC_LNK_XLATE_GET(p) BUS_TO_CPU_ADDR_XLATE(DP_DESC_LNK_GET(p)) #define DP_DESC_CMDSTS_XLATE_GET(p) BUS_TO_CPU_SWAP_32(DP_DESC_CMDSTS_GET(p)) #define DP_DESC_BUFPTR_XLATE_GET(p) BUS_TO_CPU_ADDR_XLATE(DP_DESC_BUFPTR_GET(p)) #define DP_DESC_LNK_XLATE_SET(p, v) \ DP_DESC_LNK_SET(p, CPU_TO_BUS_ADDR_XLATE(v)) #define DP_DESC_CMDSTS_XLATE_SET(p, v) \ DP_DESC_CMDSTS_SET(p, CPU_TO_BUS_SWAP_32(v)) #define DP_DESC_BUFPTR_XLATE_SET(p,v) \ DP_DESC_BUFPTR_SET(p, CPU_TO_BUS_ADDR_XLATE(v)) /* Descriptor queue */ struct fa31x_queue { virt_addr first_desc_addr; /* descriptor array address */ virt_addr last_desc_addr; /* last descriptor address */ virt_addr cur_desc_addr; /* current descriptor address */ virt_addr qbuf; /* allocated queue buffer */ u16 count; /* number of elements */ }; /* Queue types -- qtype */ #define DP_QUEUE_TYPE_TX 1 /* Transmit queue */ #define DP_QUEUE_TYPE_RX 2 /* Receive queue */ /* Device private data */ struct fa31x_priv { struct device * next; /* Next fa31xdevice */ struct fa31x_queue tx_queue; /* Transmit Descriptor Queue */ struct fa31x_queue rx_queue; /* Receive Descriptor Queue */ struct enet_statistics stats; /* MIB data */ }; static struct device * fa31x_dev_list; /* List of fa31xdevices */ /* Linux Network Driver interface routines */ extern int fa31x_probe (struct device *dev); static int fa31x_open (struct device *dev); static int fa31x_close (struct device *dev); static int fa31x_start_xmit (struct sk_buff *skb, struct device *dev); static void fa31x_set_multicast_list (struct device *dev); static int fa31x_ioctl (struct device *dev, struct ifreq *rq, int cmd); static void fa31x_interrupt (int irq, void *dev_id, struct pt_regs *regs); static struct enet_statistics *fa31x_get_stats (struct device *dev); /* Support Functions */ /*static u16 swap_16 (u16 us);*/ /*static u32 swap_32 (u32 ui);*/ static u32 io_read_32 (u16 io_port); static void io_write_32 (u16 io_port, u32 data); static u16 io_read_16 (u16 io_port); /*static void io_write_16 (u16 io_port, u16 data);*/ /* Driver Private Routines */ static void fa31x_mac_address_set (u32 iobase, char *mac_addr); static void fa31x_mac_address_get (u32 iobase, char *mac_addr); static status fa31x_dev_reset (u32 iobase); static status fa31x_queue_create (struct fa31x_queue *q, int count, int qtype); static status fa31x_queue_delete (struct fa31x_queue *q); static virt_addr fa31x_tx_desc_get (struct device *dev); static virt_addr fa31x_rx_desc_get (struct device *dev); static status fa31x_phy_setup (struct device *dev); static int fa31x_crc (char * mc_addr); static void fa31x_tx_skb_reclaim (struct device *dev, virt_addr desc_addr); static void ReadEEWord(u16 iobase,u32 wordOffset,u16* pEeData); /* Driver Debug Routines */ #ifdef DEBUG static void fa31x_regs_info (u16 iobase); #endif /* * fa31x_probe - enumerate the PCI bus for instances of FA311/FA312 * * This routine enumerates FA311/FA312 ethernet devices on the PCI bus, and * registers each FA311/FA312 device found. */ int fa31x_probe (struct device *dev) { int dev_count; u8 bus; u8 func; u8 irq; u32 iobase; u32 version; if (! pcibios_present()) return -ENODEV; /* No such device */ dev_count=0; while (pcibios_find_device (PCI_VENDOR_ID_NS, PCI_VENDOR_ID_NS_83815, dev_count, &bus, &func) == PCIBIOS_SUCCESSFUL) { /* Allocate, name the device and add to ethernet device list */ dev = init_etherdev(dev, sizeof (struct fa31x_priv)); if (dev == NULL) { printk (KERN_INFO "%s: Failed to create device struct\n", DP_DRV_NAME); break; } /* Read PCI Configuration Registers */ pcibios_read_config_byte (bus, func, PCI_INTERRUPT_LINE, &irq); pcibios_read_config_dword (bus, func, PCI_BASE_ADDRESS_0, &iobase); iobase &= PCI_BASE_ADDRESS_IO_MASK; /* Put the device in a quiescent state */ if (fa31x_dev_reset (iobase) != OK) { printk (KERN_INFO "%s: Device Reset failed.\n", DP_DRV_NAME); kfree (dev); continue; /* Try the next device */ } DP_REG32_WRITE(DP_CCSR, 0x00008000); DP_REG32_WRITE(DP_WCSR, 0x00000000); /* Get the ethernet address */ fa31x_mac_address_get (iobase, dev->dev_addr); /* If address is not set, set up a default one */ /* XXX needed only for pre-release versions of the hardware */ if ((dev->dev_addr[0] == 0) && (dev->dev_addr[1] == 0) && (dev->dev_addr[2] == 0) && (dev->dev_addr[3] == 0) && (dev->dev_addr[4] == 0) && (dev->dev_addr[5] == 0)) { u32 random = jiffies; u8 * ptr = (u8 *) &random; dev->dev_addr[0] = 0x08; /* National's Ethernet ID 0 */ // dev->dev_addr[1] = 0x00; /* National's Ethernet ID 1 */ // dev->dev_addr[2] = 0x17; /* National's Ethernet ID 2 */ dev->dev_addr[3] = *ptr++; dev->dev_addr[4] = *ptr++; dev->dev_addr[5] = *ptr; } /* initialize the device data */ dev->base_addr = iobase; dev->irq = irq; dev->open = fa31x_open; dev->stop = fa31x_close; dev->get_stats = fa31x_get_stats; dev->do_ioctl = fa31x_ioctl; dev->hard_start_xmit = fa31x_start_xmit; dev->set_multicast_list = fa31x_set_multicast_list; ether_setup (dev); /* initialize generic fields */ /* reserve IO region */ request_region (iobase, FA31x_PCI_IO_SIZE, dev->name); /* Display board info */ version = DP_REG32_READ(DP_SRR); printk (KERN_INFO "%s: bus=%d func=%d io=0x%x irq=%d ver=%d.%d\n", dev->name, bus, func, iobase, irq, (version & DP_SRR_MAJ) >> DP_SRR_MAJ_SHF, (version & DP_SRR_MIN)); /* If address is not set, set up a default one */ /* XXX needed only for pre-release versions of the hardware */ if ((dev->dev_addr[0] == 0) && (dev->dev_addr[1] == 0) && (dev->dev_addr[2] == 0) && (dev->dev_addr[3] == 0) && (dev->dev_addr[4] == 0) && (dev->dev_addr[5] == 0)) { u32 random = jiffies; u8 * ptr = (u8 *) &random; dev->dev_addr[0] = 0x08; /* National's Ethernet ID 0 */ dev->dev_addr[1] = 0x00; /* National's Ethernet ID 1 */ dev->dev_addr[2] = 0x17; /* National's Ethernet ID 2 */ dev->dev_addr[3] = *ptr++; dev->dev_addr[4] = *ptr++; dev->dev_addr[5] = *ptr; } printk (KERN_INFO "%s: ethernet addr=%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); /* Chain the device */ ((struct fa31x_priv *)(dev->priv))->next = fa31x_dev_list; fa31x_dev_list = dev; #ifdef DEBUG printk (KERN_INFO "%s: DebugInfo: dev=0x%x priv=0x%x " "&dp_debug_level=0x%x\n", dev->name, (u32)dev, (u32)dev->priv, (u32)&dp_debug_level); #endif /* Update Counters */ dev_count++; dev=NULL; } return dev_count ? OK : -ENODEV; } /* fa31x_open - open and initialize a device */ static int fa31x_open (struct device *dev) { u32 iobase = dev->base_addr; struct fa31x_priv* priv = dev->priv; /* Reset the device -- paranoia! */ if (fa31x_dev_reset (iobase) != OK) return -EAGAIN; /* Allocate Tx and Rx queues */ if (fa31x_queue_create (&priv->tx_queue, DP_DEFAULT_TXQ_SIZE, DP_QUEUE_TYPE_TX) != OK) { printk (KERN_INFO "%s: Failed to create tx queue\n", dev->name); return -EAGAIN; } if (fa31x_queue_create (&priv->rx_queue, DP_DEFAULT_RXQ_SIZE, DP_QUEUE_TYPE_RX) != OK) { fa31x_queue_delete (&priv->tx_queue); printk (KERN_INFO "%s: Failed to create rx queue\n", dev->name); return -EAGAIN; } /* Install the Tx and Rx queues on the device */ DP_REG32_WRITE (DP_TXDP, virt_to_bus(priv->tx_queue.first_desc_addr)); DP_REG32_WRITE (DP_RXDP, virt_to_bus(priv->rx_queue.first_desc_addr)); DP_DEBUG (DP_DEBUG_OPEN, (KERN_INFO "dp: setting TXDP=0x%x RXDP=0x%x\n", (u32)virt_to_bus (priv->tx_queue.first_desc_addr), (u32)virt_to_bus (priv->rx_queue.first_desc_addr))); /* Install interrupt vector */ if (request_irq (dev->irq, &fa31x_interrupt, SA_SHIRQ, dev->name, dev) != OK) { fa31x_queue_delete (&priv->tx_queue); fa31x_queue_delete (&priv->rx_queue); return -EAGAIN; } /* Setup phy capabilities */ if (fa31x_phy_setup (dev) != OK) { printk (KERN_INFO "%s: Warning PHY setup did not complete. Check cable.\n", dev->name); } /* Setup transmit control */ DP_REG32_WRITE (DP_TXCFG, (DP_TXCFG_DRTH_SET(0x30) | DP_TXCFG_FLTH_SET(0x10) | DP_TXCFG_MXDMA_32 | DP_TXCFG_ATP)); DP_DEBUG (DP_DEBUG_OPEN, (KERN_INFO "dp: TXCFG set to 0x%x\n", (DP_TXCFG_DRTH_SET(0x30) | DP_TXCFG_FLTH_SET(0x10) | DP_TXCFG_MXDMA_32 | DP_TXCFG_ATP))); /* Setup receive control */ DP_REG32_WRITE (DP_RXCFG, (DP_RXCFG_DRTH_SET(0x08) | DP_RXCFG_MXDMA_32)); DP_DEBUG (DP_DEBUG_OPEN, (KERN_INFO "dp: RXCFG set to 0x%x\n", (DP_RXCFG_DRTH_SET(0x08) | DP_RXCFG_MXDMA_32))); /* Setup the ethernet address */ fa31x_mac_address_set (iobase, dev->dev_addr); /* Receive perfect match and broadcast packets */ DP_REG32_WRITE (DP_RFCR, 0); DP_REG32_WRITE (DP_RFCR, (DP_RFCR_AAB | /* all broadcast pkts */ DP_RFCR_APM | /* perfect match pkts */ DP_RFCR_RFEN)); DP_DEBUG (DP_DEBUG_OPEN, (KERN_INFO "dp: RFCR set to 0x%x\n", DP_RFCR_RFEN | DP_RFCR_APM | DP_RFCR_AAB)); /* Turn on device interrupts */ DP_REG32_WRITE (DP_IMR, (DP_IMR_RXOK | DP_IMR_MIB | DP_IMR_RTABT | DP_IMR_RMABT | DP_IMR_SSERR | DP_IMR_PHY)); DP_REG32_WRITE (DP_IER, DP_IER_IE); /* Enable Tx/Rx */ DP_REG32_WRITE (DP_CR, DP_CR_TXE | DP_CR_RXE); /* Increment module reference count */ MOD_INC_USE_COUNT; return OK; } /* fa31x_close - close a device, and reclaim resources */ static int fa31x_close (struct device *dev) { u32 iobase = dev->base_addr; struct fa31x_priv* priv = dev->priv; /* Stop the Tx/Rx */ /* XXX Do we need to do this ??? */ DP_REG32_WRITE (DP_CR, (DP_CR_TXD | DP_CR_RXD)); /* Reset the device */ fa31x_dev_reset (iobase); /* Uninstall the interrupt vector */ free_irq (dev->irq, dev); /* Free the Tx and Rx queues */ fa31x_queue_delete (&priv->tx_queue); fa31x_queue_delete (&priv->rx_queue); /* Decrement module reference count */ MOD_DEC_USE_COUNT; return OK; } /* * fa31x_start_xmit - transmit an ethernet packet. * * This routine writes to a tx descriptor, sets the ownership bit of the * CMDSTS, and signals the chip */ static int fa31x_start_xmit (struct sk_buff *skb, struct device *dev) { u32 iobase = dev->base_addr; u32 cmdsts; virt_addr tx_desc; struct enet_statistics *stats_p; if (skb->len > ETH_MAX_PKT_SIZE) return ERROR; tx_desc = fa31x_tx_desc_get(dev); if (tx_desc == NULL) { set_bit (0, &dev->tbusy); DP_REG32_SET (DP_IMR, DP_IMR_TXOK | DP_IMR_TXIDLE); tx_desc = fa31x_tx_desc_get (dev); } stats_p = &((struct fa31x_priv *)(dev->priv))->stats; /* Update tx_desc to point to SKB data, set CMDSTS, and signal the chip */ if (tx_desc != NULL) { /* Reclaim SKBs from the TX queue */ if (DP_DESC_SKBPTR_GET (tx_desc)) fa31x_tx_skb_reclaim (dev, tx_desc); /* update statistics of the previous transmit */ cmdsts = DP_DESC_CMDSTS_XLATE_GET (tx_desc); if(DP_REG32_READ(DP_ISR) & DP_ISR_TXERR) { /*modified by Pam 2001/7/16 */ /* if (cmdsts & DP_DESC_CMDSTS_TX_ERRORS) { */ stats_p->tx_errors++; /* Update individual counters */ stats_p->collisions += DP_DESC_CMDSTS_TX_COLLISIONS_GET(cmdsts); if (cmdsts & DP_DESC_CMDSTS_TX_TXA) /* tx aborted */ stats_p->tx_packets--; if (cmdsts & DP_DESC_CMDSTS_TX_TFU) /* fifo errors */ stats_p->tx_fifo_errors++; if (cmdsts & DP_DESC_CMDSTS_TX_CRS) /* lost carrier */ stats_p->tx_carrier_errors++; if (cmdsts & DP_DESC_CMDSTS_TX_OWC) /* out of window collisions */ stats_p->tx_window_errors++; } /* Update the descriptor */ DP_DESC_CMDSTS_XLATE_SET (tx_desc, DP_DESC_CMDSTS_OWN|skb->len); DP_DESC_BUFPTR_XLATE_SET (tx_desc, skb->data); DP_DESC_SKBPTR_SET (tx_desc, (u32)skb); dev->trans_start = jiffies; DP_REG32_SET (DP_CR, DP_CR_TXE); DP_DEBUG (DP_DEBUG_TX, (KERN_INFO "Tx: tx_desc=0x%x ", (u32)tx_desc)); stats_p->tx_packets++; } else stats_p->tx_dropped++; return OK; } /* * fa31x_start_receive - receive the data from a Rx Queue descriptor * * This routine receives the data from Rx queue as long as it gets a valid * rx_descriptor and resets the descriptor's CMDSTS field back to the Buffer * size, and updates the BUFPTR and SKBPTR fields to the newly allocated SKB. */ static int fa31x_start_receive (struct device *dev) { u32 cmdsts; int len; bool do_copy; virt_addr rx_desc; struct sk_buff *cur_skb; struct sk_buff *new_skb; struct sk_buff *rx_skb; struct enet_statistics *stats_p; stats_p = &((struct fa31x_priv *)(dev->priv))->stats; for (rx_desc = fa31x_rx_desc_get(dev); (rx_desc != NULL); rx_desc = fa31x_rx_desc_get(dev)) { DP_DEBUG (DP_DEBUG_RX, (KERN_INFO "Rx: rx_desc=0x%x, CMDSTS = 0x%x", (u32)rx_desc, DP_DESC_CMDSTS_XLATE_GET(rx_desc))); cmdsts = DP_DESC_CMDSTS_XLATE_GET (rx_desc); /* Send the packet to the stack if no errors */ if ((cmdsts & DP_DESC_CMDSTS_RX_ERRORS) == 0) { len = (cmdsts & DP_DESC_CMDSTS_SIZE) - ETH_CRC_LEN; /* * Allocate a new SKB * small data packets less than DP_RX_COPY_THRESHOLD are copied * into the new SKB, other allocate one to replace the current SKB. */ if (len < DP_RX_COPY_THRESHOLD) { do_copy = TRUE; new_skb = alloc_skb (len + 2, GFP_ATOMIC); } else { do_copy = FALSE; new_skb = alloc_skb (ETH_MAX_PKT_SIZE, GFP_ATOMIC); } if (new_skb) { cur_skb = (struct sk_buff *) DP_DESC_SKBPTR_GET (rx_desc); if (do_copy) { /* Copy data from current SKB and send the new SKB up */ rx_skb = new_skb; skb_reserve (rx_skb, 2); memcpy (skb_put(rx_skb, len), cur_skb->data, len); } else { /* Replace the the current SKB with the new SKB */ rx_skb = cur_skb; DP_DESC_BUFPTR_XLATE_SET (rx_desc, new_skb->data); DP_DESC_SKBPTR_SET (rx_desc, (u32) new_skb); (void) skb_put(rx_skb, len); } /* update the SKB and set it up */ rx_skb->dev = dev; rx_skb->protocol = eth_type_trans (rx_skb, dev); netif_rx (rx_skb); dev->last_rx = jiffies; stats_p->rx_packets++; } else stats_p->rx_dropped++; /* no resources */ if (cmdsts & DP_DESC_CMDSTS_RX_DEST_MC) stats_p->multicast++; } else { stats_p->rx_errors++; /* bad packet */ /* Update individual counters */ if (cmdsts & (DP_DESC_CMDSTS_RX_RUNT | DP_DESC_CMDSTS_RX_LONG)) stats_p->rx_length_errors++; if (cmdsts & DP_DESC_CMDSTS_RX_CRCE) stats_p->rx_crc_errors++; if (cmdsts & DP_DESC_CMDSTS_RX_FAE) stats_p->rx_frame_errors++; if (cmdsts & DP_DESC_CMDSTS_RX_RXO) stats_p->rx_fifo_errors++; } /* Cleanup the descriptor and make available for reception */ DP_DESC_CMDSTS_XLATE_SET (rx_desc, ETH_MAX_PKT_SIZE); } return OK; } /* fa31x_get_stats - get current device statistics */ static struct enet_statistics * fa31x_get_stats (struct device *dev) { return &((struct fa31x_priv *)(dev->priv))->stats; } /* fa31x_set_multicast_list - sets multicast, & promiscuous mode */ static void fa31x_set_multicast_list (struct device *dev) { u32 iobase = dev->base_addr; u16 hash_table[32]; u32 rfcr_flags; int i; struct dev_mc_list * mc_list; /* default RFCR mode */ rfcr_flags = DP_RFCR_APM | DP_RFCR_AAB | DP_RFCR_RFEN; /* Setup promiscuous mode */ if (dev->flags & IFF_PROMISC) { DP_DEBUG (DP_DEBUG_OPEN, (KERN_INFO "IFF_PROMISC\n")); rfcr_flags = (DP_RFCR_AAU | DP_RFCR_AAM | DP_RFCR_AAB | DP_RFCR_RFEN); } else if (dev->flags & IFF_ALLMULTI) { /* Receive all multicast packets */ DP_DEBUG (DP_DEBUG_OPEN, (KERN_INFO "IFF_ALLMULTI\n")); rfcr_flags |= DP_RFCR_AAM; } else { /* Setup to receive programmed multicast packets */ memset (hash_table, 0, 32); for (i=0, mc_list=dev->mc_list; mc_list && i < dev->mc_count; i++, mc_list = mc_list->next) { DP_DEBUG (DP_DEBUG_OPEN, (KERN_INFO "mc_addr=%p\n", mc_list->dmi_addr)); set_bit (fa31x_crc((char *)mc_list->dmi_addr) & 0x1ff, hash_table); } /* install the hash table */ for (i=0; i<32; i++) { DP_REG32_WRITE (DP_RFCR, DP_RFCR_RFADDR_FMEM_LO + i*2); DP_REG32_WRITE (DP_RFDR, (u32) hash_table[i]); } rfcr_flags |= DP_RFCR_MHEN; } DP_REG32_WRITE (DP_RFCR, 0); DP_REG32_WRITE (DP_RFCR, rfcr_flags); DP_DEBUG (DP_DEBUG_OPEN, (KERN_INFO "MC Setup RFCR flags=0x%x\n", rfcr_flags)); return; } /* fa31x_crc - computer CRC for hash table entries */ static int fa31x_crc (char * mc_addr) { u32 crc; u8 cur_byte; u8 msb; u8 byte, bit; crc = ~0; for (byte=0; byte<6; byte++) { cur_byte = *mc_addr++; for (bit=0; bit<8; bit++) { msb = crc >> 31; crc <<= 1; if (msb ^ (cur_byte & 1)) { crc ^= DP_POLYNOMIAL; crc |= 1; } cur_byte >>= 1; } } crc >>= 23; return (crc); } /* fa31x_interrupt - handle driver specific ioctls */ static int fa31x_ioctl (struct device *dev, struct ifreq *rq, int cmd) { return -EOPNOTSUPP; } /* 02/15/2000 */ static u32 PreviousLinkStatus=0; /* fa31x_interrupt - handle the interrupts */ static void fa31x_interrupt (int irq, void *dev_id, struct pt_regs *regs) { struct device * dev = dev_id; u16 iobase = dev->base_addr; u32 reg_isr; u32 CurrentLinkStatus; CurrentLinkStatus= DP_REG32_READ(DP_PHYSTS); #define HAL_PHY_SPEED10 0x00000002 if(PreviousLinkStatus!=CurrentLinkStatus) { if(CurrentLinkStatus & HAL_PHY_SPEED10) { DP_REG32_WRITE(DP_PHY_PAGE,0x0001); DP_REG32_WRITE(DP_PHY_EXTCFG,0x0000); DP_REG32_WRITE(DP_PHY_PAGE,0x0000); } else { DP_REG32_WRITE(DP_PHY_PAGE,0x0001); DP_REG32_WRITE(DP_PHY_EXTCFG,0x0010); DP_REG32_WRITE(DP_PHY_PAGE,0x0000); } PreviousLinkStatus=CurrentLinkStatus; } reg_isr = DP_REG32_READ (DP_ISR); DP_DEBUG (DP_DEBUG_IOCTL, (KERN_INFO "%s: intr_status=0x%x\n", dev->name, reg_isr)); if (reg_isr & DP_ISR_RXOK) fa31x_start_receive (dev); if (reg_isr & (DP_ISR_TXOK | DP_ISR_TXIDLE)) { DP_REG32_CLR (DP_IMR, (DP_IMR_TXOK|DP_IMR_TXIDLE)); clear_bit (0, &dev->tbusy); mark_bh (NET_BH); } } /* fa31x_mac_address_set - set the ethernet address */ static void fa31x_mac_address_set (u32 iobase, char *mac_addr) { u16 * mac_addr_ptr; int i; for (i=0, mac_addr_ptr = (u16 *)mac_addr; i<3; i++, mac_addr_ptr++) { DP_REG32_WRITE (DP_RFCR, DP_RFCR_RFADDR_PMATCH1 + i*2); DP_REG32_WRITE (DP_RFDR, CPU_TO_BUS_SWAP_16 (*mac_addr_ptr)); } } /* fa31x_mac_address_get - get the ethernet address */ static void fa31x_mac_address_get (u32 iobase, char *mac_addr) { u16 * mac_addr_ptr=(u16 *)mac_addr; int i; u16 mask; u16 word1 = 0; u16 word2 = 0; u16 word3 = 0; u16 word4 = 0; u16 nicAddress[ 3 ]; // // Read 16 bit words 6 - 9 from the EEProm. They contain the hardwares MAC // address in a rather cryptic format. // ReadEEWord( iobase, 0x06, &word1 ); ReadEEWord( iobase, 0x07, &word2 ); ReadEEWord( iobase, 0x08, &word3 ); ReadEEWord( iobase, 0x09, &word4 ); // // Decode the cryptic format into what we can use a word at a time. // nicAddress[ 0 ] = word1 & 1; nicAddress[ 1 ] = word2 & 1; nicAddress[ 2 ] = word3 & 1; i = 15; mask = 0x2; while ( i-- ) { if ( word2 & 0x8000 ) { nicAddress[ 0 ] |= mask; } word2 = word2 << 1; mask = mask << 1; } //printk("word0=%x\n",nicAddress[0]); *mac_addr_ptr=nicAddress[0]; mac_addr_ptr++; i = 15; mask = 0x2; while ( i-- ) { if ( word3 & 0x8000 ) { nicAddress[ 1 ] |= mask; } word3 = word3 << 1; mask = mask << 1; } //printk("word1 =%x\n",nicAddress[1]); *mac_addr_ptr=nicAddress[1]; mac_addr_ptr++; i = 15; mask = 0x2; while ( i-- ) { if ( word4 & 0x8000 ) { nicAddress[ 2 ] |= mask; } word4 = word4 << 1; mask = mask << 1; } //printk("word2 =%x\n",nicAddress[2]); *mac_addr_ptr=nicAddress[2]; } /* fa31x_dev_reset - soft reset FA311/FA312 */ static status fa31x_dev_reset (u32 iobase) { int timeout = 100; /* XXX cleanup: use macro */ DP_REG32_WRITE (DP_CR, DP_CR_RST); while (timeout--) { if (DP_REG32_READ (DP_ISR) == 0x03008000) { return (OK); } udelay (5); } return ERROR; } /* * fa31x_queue_create - create a circular queue of descriptors * * This routine allocates a descriptor buffer array aligned on a word * boundary, initializes and links the array to make a circular queue. */ static status fa31x_queue_create (struct fa31x_queue *q, int count, int qtype) { virt_addr desc_addr; int i; struct sk_buff *skb; /* allocate the desc buffer array */ q->qbuf = (virt_addr) kmalloc (DP_QUEUE_ELE_SIZE * count + DP_ALIGN, GFP_DMA); if (q->qbuf == (virt_addr) NULL) return ERROR; memset ((char *)q->qbuf, 0, DP_QUEUE_ELE_SIZE * count + DP_ALIGN); /* Adjust alignment and Initialize queue data */ q->cur_desc_addr = q->first_desc_addr = (virt_addr)(((u32)q->qbuf + DP_ALIGN) & ~(DP_ALIGN - 1)); q->last_desc_addr = q->first_desc_addr + ((count -1) * DP_QUEUE_ELE_SIZE); q->count = count; /* Initialize each buffer descriptor, and link them into circular queue */ for (i=0, desc_addr=q->first_desc_addr; i i++, desc_addr+=DP_QUEUE_ELE_SIZE) { DP_DESC_LNK_XLATE_SET (desc_addr, desc_addr + DP_QUEUE_ELE_SIZE); /* Update the size, BUFPTR, and SKBPTR fields for RX descriptors */ if (qtype == DP_QUEUE_TYPE_RX) { skb = alloc_skb (ETH_MAX_PKT_SIZE, GFP_ATOMIC); if (skb == NULL) { fa31x_queue_delete (q); return (ERROR); } DP_DESC_CMDSTS_XLATE_SET (desc_addr, ETH_MAX_PKT_SIZE); DP_DESC_BUFPTR_XLATE_SET (desc_addr, skb->data); DP_DESC_SKBPTR_SET (desc_addr, (u32) skb); } } /* Make the queue circular */ DP_DESC_LNK_XLATE_SET (q->last_desc_addr, q->first_desc_addr); return OK; } /* fa31x_queue_delete - frees an allocated descriptor queue */ static status fa31x_queue_delete (struct fa31x_queue *q) { int i; virt_addr desc_addr; struct sk_buff *skb; /* Free all SKBs in the queue */ for (i=0, desc_addr=q->first_desc_addr; (i < q->count); i++, desc_addr += DP_QUEUE_ELE_SIZE) { skb = (struct sk_buff *) DP_DESC_SKBPTR_GET (desc_addr); if (skb != NULL) dev_kfree_skb (skb); } /* Free the queue buffer */ kfree ((char *)q->qbuf); return (OK); } /* * fa31x_tx_desc_get - get a valid transmit descriptor * * This routine returns the current descriptor from the tx_queue if driver is * the owner, else returns NULL */ static virt_addr fa31x_tx_desc_get (struct device *dev) { struct fa31x_queue * q; virt_addr desc_addr = NULL; q = &((struct fa31x_priv *)(dev->priv))->tx_queue; /* Check if we own the descriptor */ if ((DP_DESC_CMDSTS_XLATE_GET (q->cur_desc_addr) & DP_DESC_CMDSTS_OWN) == 0) { desc_addr = q->cur_desc_addr; DP_QUEUE_ELE_NEXT (q); /* Move to the next element */ } return desc_addr; } /* fa31x_tx_skb_reclaim - reclaim SKBs in transmitted descriptors */ static void fa31x_tx_skb_reclaim (struct device *dev, virt_addr desc_addr) { struct sk_buff * skb; struct fa31x_queue * q; /* Reclaim buffers from all descriptors we own. */ q = &((struct fa31x_priv *)(dev->priv))->tx_queue; while (((DP_DESC_CMDSTS_XLATE_GET(desc_addr) & DP_DESC_CMDSTS_OWN) == 0) && ((skb=(struct sk_buff *) DP_DESC_SKBPTR_GET(desc_addr)) != NULL)) { dev_kfree_skb (skb); DP_DESC_SKBPTR_SET (desc_addr, 0); desc_addr = DP_QUEUE_ELE_NEXT_GET (q, desc_addr); } } /* * fa31x_rx_desc_get - get a valid receive descriptor * * This routine returns the current descriptor from the rx_queue if driver is * the owner, else returns NULL */ static virt_addr fa31x_rx_desc_get (struct device *dev) { struct fa31x_queue * q; virt_addr desc_addr = NULL; q = &((struct fa31x_priv *)(dev->priv))->rx_queue; /* Check if we own the descriptor */ if (DP_DESC_CMDSTS_XLATE_GET (q->cur_desc_addr) & DP_DESC_CMDSTS_OWN) { desc_addr = q->cur_desc_addr; DP_QUEUE_ELE_NEXT(q); /* Move to the next element */ } return desc_addr; } /* fa31x_phy_setup - reset and setup the PHY device */ int link_speed=0; #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0) MODULE_PARM(link_speed, "i"); #endif static status fa31x_phy_setup (struct device *dev) { u32 iobase = dev->base_addr; u32 dp_cfg_val; u16 phy_status; u16 timeout; u32 lnk_status; u32 lnk_check = 0; dp_cfg_val = DP_REG32_READ(DP_CFG); dp_cfg_val &= 0xFFFF1FFF; /* clear auto-negotiation select */ dp_cfg_val |= (DP_CFG_PESEL | /* parity error detect */ DP_CFG_PAUSE_ADV | /* pause capable */ DP_CFG_PINT_ACEN | /* phy intr auto clear */ 0x00040000); /* phy config */ switch (link_speed) { case 1: /* Force 10Mb Half duplex */ dp_cfg_val |= DP_CFG_ANEG_SEL_10_HD; break; case 2: /* Force 100Mb Half duplex */ dp_cfg_val |= DP_CFG_ANEG_SEL_100_HD; break; case 3: /* Force 10Mb Full duplex */ dp_cfg_val |= DP_CFG_ANEG_SEL_10_FD; break; case 4: /* Force 100Mb Full duplex */ dp_cfg_val |= DP_CFG_ANEG_SEL_100_FD; break; default: printk (KERN_INFO "Usage: insmod fa31x link_speed=n (n=0...4)"); printk (KERN_INFO "Force to 10/100 full/half autonegotiate mode)"); case 0: /* Autonegotiate 10/100 full/half */ dp_cfg_val |= DP_CFG_ANEG_SEL_AUTO; break; } DP_REG32_WRITE (DP_CFG, dp_cfg_val | DP_CFG_PHY_RST); udelay (500); DP_REG32_WRITE (DP_CFG, dp_cfg_val); for (timeout=10000; timeout; timeout--) { lnk_status = DP_REG32_READ (DP_CFG); switch (link_speed) { case 1: /* Force 10Mb Half duplex */ if (!(lnk_status & (DP_CFG_SPEED100 | DP_CFG_FDUP))) { lnk_check = 1; break; } udelay (500); break; case 2: /* Force 100Mb Half duplex */ if ((lnk_status & (DP_CFG_SPEED100 | DP_CFG_FDUP)) == DP_CFG_SPEED100) { lnk_check = 1; break; } udelay (500); break; case 3: /* Force 10Mb Full duplex */ if ((lnk_status & (DP_CFG_ANEG_DN | DP_CFG_SPEED100)) == DP_CFG_ANEG_DN) { lnk_check = 1; break; } udelay (500); break; case 4: /* Force 100Mb Full duplex */ if ((lnk_status & (DP_CFG_ANEG_DN | DP_CFG_SPEED100)) == (DP_CFG_ANEG_DN | DP_CFG_SPEED100)) { lnk_check = 1; break; } udelay (500); break; case 0: /* Autonegotiate 10/100 full/half */ default: if (DP_REG32_READ (DP_CFG) & DP_CFG_ANEG_DN) { lnk_check = 1; break; } udelay (500); } if (lnk_check) break; } if (timeout == 0) { DP_DEBUG (DP_DEBUG_ANEG, (KERN_INFO "Phy Autonegotiate Failed\n")); return (ERROR); } DP_REG32_WRITE (DP_PHY_PAGE, DP_PHY_PAGE_VAL); DP_REG32_WRITE (DP_PHYCR, DP_PHYCR_PMDCSR_VAL); DP_REG32_WRITE (DP_PHY_TDATA, DP_PHY_TDATA_VAL); DP_REG32_WRITE (DP_PHY_DSPCFG, DP_PHY_DSPCFG_VAL); DP_REG32_WRITE (DP_PHY_SDCFG, DP_PHY_SDCFG_VAL); DP_REG32_WRITE (DP_PHY_PAGE, (u16) 0x0000); phy_status = DP_REG16_READ (DP_PHYSTS); printk (KERN_INFO "%s: speed=%d duplex=%s link=%s\n", dev->name, (phy_status & DP_PHYSTS_SPEED_10) ? 10 : 100, (phy_status & DP_PHYSTS_FDX)? "full" : "half", (phy_status & DP_PHYSTS_LNK_VALID) ? "up" : "down"); return (OK); } #if 0 /* swap_16 - swap a 16 bit value between little endian & big endian byteorder */ static u16 swap_16 (u16 us) { return ((us << 8) & 0xff00) | ((us >> 8) & 0x00ff); } #endif #if 0 /* Not used */ /* swap_32 - swap a 32 bit value between little endian & big endian byteorder */ static u32 swap_32 (u32 ui) { return ((swap_16 (ui & 0x0000ffff) << 16) | swap_16 (ui >> 16)); } #endif /* io_read_16 - read the 16 bit value stored at given io address */ static u16 io_read_16 (u16 io_port) { return inw (io_port); } #if 0 /* Not used */ /* io_write_16 - write the 16 bit data at given io address */ static void io_write_16 (u16 io_port, u16 data) { outw (data, io_port); } #endif /* io_read_32 - read the 32 bit value stored at given io address*/ static u32 io_read_32 (u16 io_port) { return inl (io_port); } /* io_write_32 - write the 32 bit data at given io address */ static void io_write_32 (u16 io_port, u32 data) { outl (data, io_port); } #ifdef DEBUG /* fa31x_desc_info - print info on descriptors * * This routine displays values of the elements of fa31x_queue; * if option is -1, prints info on all the descs and their field vals; * and in all other cases prints info on the specified descriptor. */ static void fa31x_desc_info (struct fa31x_queue * q, int option) { virt_addr desc_addr; u32 i; /* Display info header */ printk ( KERN_DEBUG "fa31x_desc_info(): q=0x%x, " "first_desc_addr=0x%x, last_desc_addr=0x%x cur_desc_addr=0x%x\n", (u32)q, (u32)q->first_desc_addr, (u32)q->last_desc_addr, (u32)q->cur_desc_addr); /* Print requested element info */ switch (option) { case -1: /* all elements */ desc_addr = q->first_desc_addr; for (i=0; icount; i++) { printk (KERN_DEBUG "desc_addr=0x%x link=0x%x " "cmdsts=0x%x bufptr=0x%x\n", (u32)desc_addr, DP_DESC_LNK_GET (desc_addr), DP_DESC_CMDSTS_GET (desc_addr), DP_DESC_BUFPTR_GET (desc_addr)); desc_addr += DP_QUEUE_ELE_SIZE; } break; default: /* a specific element */ if (option > q->count) { printk (KERN_DEBUG "Can't print info for ele=%d when count=%d\n", option, q->count); } else { desc_addr = q->first_desc_addr + (DP_QUEUE_ELE_SIZE * (option - 1)); printk (KERN_DEBUG "ele=%d desc_addr=0x%x link=0x%x " "cmdsts=0x%x bufptr=0x%x\n", option, (u32)desc_addr, DP_DESC_LNK_GET (desc_addr), DP_DESC_CMDSTS_GET (desc_addr), DP_DESC_BUFPTR_GET (desc_addr)); } } } /* fa31x_regs_info - prints values of registers */ static void fa31x_regs_info (u16 iobase) { printk (KERN_INFO "dp(0x%x): CFG=0x%x IMR=0x%x IER=0x%x\n", iobase, DP_REG32_READ (DP_CFG), DP_REG32_READ (DP_IMR), DP_REG32_READ (DP_IER)); printk (KERN_INFO " ++ TXDP=0x%x TXCFG=0x%x RXDP=0x%x RXCFG=0x%x\n", DP_REG32_READ (DP_TXDP), DP_REG32_READ (DP_TXCFG), DP_REG32_READ (DP_RXDP), DP_REG32_READ (DP_RXCFG)); } #endif #ifdef MODULE /* * init_module - Initialize the driver module * * This routine is called to initialize the driver when the module in * installed into a running kernel via insmod. * */ int init_module (void) { printk (KERN_INFO "%s", version); return fa31x_probe (NULL); } /* * cleanup_module - Deinstall the driver module. * * This routine is called when removing the driver module from a running * kernel via rmmod. * */ void cleanup_module (void) { struct device *cur_dev; cur_dev=fa31x_dev_list; while (cur_dev) { fa31x_dev_list = ((struct fa31x_priv *)(cur_dev->priv))->next; unregister_netdev (cur_dev); release_region (cur_dev->base_addr, FA31x_PCI_IO_SIZE); kfree (cur_dev); cur_dev = fa31x_dev_list; } } #endif /* MODULE */ static void ReadEEWord(u16 iobase,u32 wordOffset,u16* pEeData) { #define DP_MEAR 0x08 #define EECLK 0x00000004 #define EECS 0x00000008 #define EEDI 0x00000001 #define EEDO 0x00000002 u32 i = 9; u32 mask = 0x100; u32 command = 0x180 | wordOffset; u32 data; u32 temp; // // Start the sequence with Chip Select 0 for a 4 microsecond cycle. // DP_REG32_WRITE (DP_MEAR, 0); udelay( 2 ); DP_REG32_WRITE (DP_MEAR, EECLK ); udelay( 2 ); // // Write out the read command, one bit at a time, insuring that each transition // of the clock lasts at least 2 microseconds. // while ( i-- ) { data = ( command & mask ) ? EECS | EEDI : EECS; DP_REG32_WRITE(DP_MEAR, data ); udelay( 2 ); DP_REG32_WRITE(DP_MEAR, data | EECLK ); udelay( 2 ); mask = mask >> 1; } // // Read in the 16 bits of data, one bit at a time, insuring that each // transition of the clock lasts at least 2 microseconds. // i = 16; mask = 0x8000; data = 0; while ( i--) { DP_REG32_WRITE(DP_MEAR, EECS ); udelay( 2 ); DP_REG32_WRITE(DP_MEAR, EECS | EECLK ); udelay( 2 ); temp = DP_REG32_READ(DP_MEAR); if ( temp & EEDO ) { data |= mask; } mask = mask >> 1; } *pEeData = ( u16 )data; } /* * Local variables: * * for Redhat 5.2/6.0/6.x compile-command: "gcc -D__KERNEL__ -DMODULE -Wall -Wstrict-prototypes -O -m486 -c fa31x.c" * for Redhat 7.0 compile-command: "kgcc -D__KERNEL__ -DMODULE -Wall -Wstrict-prototypes -O -m486 -c fa31x.c -I/usr/src/linux/include" * version-control: t * kept-new-versions: 5 * End: */ |
Linux - Programming in C - RedHat
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