diff options
Diffstat (limited to 'drivers/net/ethernet/dec/tulip/de2104x.c')
| -rw-r--r-- | drivers/net/ethernet/dec/tulip/de2104x.c | 2197 |
1 files changed, 2197 insertions, 0 deletions
diff --git a/drivers/net/ethernet/dec/tulip/de2104x.c b/drivers/net/ethernet/dec/tulip/de2104x.c new file mode 100644 index 000000000..cd3dc4b89 --- /dev/null +++ b/drivers/net/ethernet/dec/tulip/de2104x.c @@ -0,0 +1,2197 @@ +/* de2104x.c: A Linux PCI Ethernet driver for Intel/Digital 21040/1 chips. */ +/* + Copyright 2001,2003 Jeff Garzik <jgarzik@pobox.com> + + Copyright 1994, 1995 Digital Equipment Corporation. [de4x5.c] + Written/copyright 1994-2001 by Donald Becker. [tulip.c] + + 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. + + See the file COPYING in this distribution for more information. + + TODO, in rough priority order: + * Support forcing media type with a module parameter, + like dl2k.c/sundance.c + * Constants (module parms?) for Rx work limit + * Complete reset on PciErr + * Jumbo frames / dev->change_mtu + * Adjust Rx FIFO threshold and Max Rx DMA burst on Rx FIFO error + * Adjust Tx FIFO threshold and Max Tx DMA burst on Tx FIFO error + * Implement Tx software interrupt mitigation via + Tx descriptor bit + + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#define DRV_NAME "de2104x" +#define DRV_RELDATE "Mar 17, 2004" + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/ethtool.h> +#include <linux/compiler.h> +#include <linux/rtnetlink.h> +#include <linux/crc32.h> +#include <linux/slab.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <linux/uaccess.h> +#include <asm/unaligned.h> + +MODULE_AUTHOR("Jeff Garzik <jgarzik@pobox.com>"); +MODULE_DESCRIPTION("Intel/Digital 21040/1 series PCI Ethernet driver"); +MODULE_LICENSE("GPL"); + +static int debug = -1; +module_param (debug, int, 0); +MODULE_PARM_DESC (debug, "de2104x bitmapped message enable number"); + +/* Set the copy breakpoint for the copy-only-tiny-buffer Rx structure. */ +#if defined(__alpha__) || defined(__arm__) || defined(__hppa__) || \ + defined(CONFIG_SPARC) || defined(__ia64__) || \ + defined(__sh__) || defined(__mips__) +static int rx_copybreak = 1518; +#else +static int rx_copybreak = 100; +#endif +module_param (rx_copybreak, int, 0); +MODULE_PARM_DESC (rx_copybreak, "de2104x Breakpoint at which Rx packets are copied"); + +#define DE_DEF_MSG_ENABLE (NETIF_MSG_DRV | \ + NETIF_MSG_PROBE | \ + NETIF_MSG_LINK | \ + NETIF_MSG_IFDOWN | \ + NETIF_MSG_IFUP | \ + NETIF_MSG_RX_ERR | \ + NETIF_MSG_TX_ERR) + +/* Descriptor skip length in 32 bit longwords. */ +#ifndef CONFIG_DE2104X_DSL +#define DSL 0 +#else +#define DSL CONFIG_DE2104X_DSL +#endif + +#define DE_RX_RING_SIZE 128 +#define DE_TX_RING_SIZE 64 +#define DE_RING_BYTES \ + ((sizeof(struct de_desc) * DE_RX_RING_SIZE) + \ + (sizeof(struct de_desc) * DE_TX_RING_SIZE)) +#define NEXT_TX(N) (((N) + 1) & (DE_TX_RING_SIZE - 1)) +#define NEXT_RX(N) (((N) + 1) & (DE_RX_RING_SIZE - 1)) +#define TX_BUFFS_AVAIL(CP) \ + (((CP)->tx_tail <= (CP)->tx_head) ? \ + (CP)->tx_tail + (DE_TX_RING_SIZE - 1) - (CP)->tx_head : \ + (CP)->tx_tail - (CP)->tx_head - 1) + +#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/ +#define RX_OFFSET 2 + +#define DE_SETUP_SKB ((struct sk_buff *) 1) +#define DE_DUMMY_SKB ((struct sk_buff *) 2) +#define DE_SETUP_FRAME_WORDS 96 +#define DE_EEPROM_WORDS 256 +#define DE_EEPROM_SIZE (DE_EEPROM_WORDS * sizeof(u16)) +#define DE_MAX_MEDIA 5 + +#define DE_MEDIA_TP_AUTO 0 +#define DE_MEDIA_BNC 1 +#define DE_MEDIA_AUI 2 +#define DE_MEDIA_TP 3 +#define DE_MEDIA_TP_FD 4 +#define DE_MEDIA_INVALID DE_MAX_MEDIA +#define DE_MEDIA_FIRST 0 +#define DE_MEDIA_LAST (DE_MAX_MEDIA - 1) +#define DE_AUI_BNC (SUPPORTED_AUI | SUPPORTED_BNC) + +#define DE_TIMER_LINK (60 * HZ) +#define DE_TIMER_NO_LINK (5 * HZ) + +#define DE_NUM_REGS 16 +#define DE_REGS_SIZE (DE_NUM_REGS * sizeof(u32)) +#define DE_REGS_VER 1 + +/* Time in jiffies before concluding the transmitter is hung. */ +#define TX_TIMEOUT (6*HZ) + +/* This is a mysterious value that can be written to CSR11 in the 21040 (only) + to support a pre-NWay full-duplex signaling mechanism using short frames. + No one knows what it should be, but if left at its default value some + 10base2(!) packets trigger a full-duplex-request interrupt. */ +#define FULL_DUPLEX_MAGIC 0x6969 + +enum { + /* NIC registers */ + BusMode = 0x00, + TxPoll = 0x08, + RxPoll = 0x10, + RxRingAddr = 0x18, + TxRingAddr = 0x20, + MacStatus = 0x28, + MacMode = 0x30, + IntrMask = 0x38, + RxMissed = 0x40, + ROMCmd = 0x48, + CSR11 = 0x58, + SIAStatus = 0x60, + CSR13 = 0x68, + CSR14 = 0x70, + CSR15 = 0x78, + PCIPM = 0x40, + + /* BusMode bits */ + CmdReset = (1 << 0), + CacheAlign16 = 0x00008000, + BurstLen4 = 0x00000400, + DescSkipLen = (DSL << 2), + + /* Rx/TxPoll bits */ + NormalTxPoll = (1 << 0), + NormalRxPoll = (1 << 0), + + /* Tx/Rx descriptor status bits */ + DescOwn = (1 << 31), + RxError = (1 << 15), + RxErrLong = (1 << 7), + RxErrCRC = (1 << 1), + RxErrFIFO = (1 << 0), + RxErrRunt = (1 << 11), + RxErrFrame = (1 << 14), + RingEnd = (1 << 25), + FirstFrag = (1 << 29), + LastFrag = (1 << 30), + TxError = (1 << 15), + TxFIFOUnder = (1 << 1), + TxLinkFail = (1 << 2) | (1 << 10) | (1 << 11), + TxMaxCol = (1 << 8), + TxOWC = (1 << 9), + TxJabber = (1 << 14), + SetupFrame = (1 << 27), + TxSwInt = (1 << 31), + + /* MacStatus bits */ + IntrOK = (1 << 16), + IntrErr = (1 << 15), + RxIntr = (1 << 6), + RxEmpty = (1 << 7), + TxIntr = (1 << 0), + TxEmpty = (1 << 2), + PciErr = (1 << 13), + TxState = (1 << 22) | (1 << 21) | (1 << 20), + RxState = (1 << 19) | (1 << 18) | (1 << 17), + LinkFail = (1 << 12), + LinkPass = (1 << 4), + RxStopped = (1 << 8), + TxStopped = (1 << 1), + + /* MacMode bits */ + TxEnable = (1 << 13), + RxEnable = (1 << 1), + RxTx = TxEnable | RxEnable, + FullDuplex = (1 << 9), + AcceptAllMulticast = (1 << 7), + AcceptAllPhys = (1 << 6), + BOCnt = (1 << 5), + MacModeClear = (1<<12) | (1<<11) | (1<<10) | (1<<8) | (1<<3) | + RxTx | BOCnt | AcceptAllPhys | AcceptAllMulticast, + + /* ROMCmd bits */ + EE_SHIFT_CLK = 0x02, /* EEPROM shift clock. */ + EE_CS = 0x01, /* EEPROM chip select. */ + EE_DATA_WRITE = 0x04, /* Data from the Tulip to EEPROM. */ + EE_WRITE_0 = 0x01, + EE_WRITE_1 = 0x05, + EE_DATA_READ = 0x08, /* Data from the EEPROM chip. */ + EE_ENB = (0x4800 | EE_CS), + + /* The EEPROM commands include the alway-set leading bit. */ + EE_READ_CMD = 6, + + /* RxMissed bits */ + RxMissedOver = (1 << 16), + RxMissedMask = 0xffff, + + /* SROM-related bits */ + SROMC0InfoLeaf = 27, + MediaBlockMask = 0x3f, + MediaCustomCSRs = (1 << 6), + + /* PCIPM bits */ + PM_Sleep = (1 << 31), + PM_Snooze = (1 << 30), + PM_Mask = PM_Sleep | PM_Snooze, + + /* SIAStatus bits */ + NWayState = (1 << 14) | (1 << 13) | (1 << 12), + NWayRestart = (1 << 12), + NonselPortActive = (1 << 9), + SelPortActive = (1 << 8), + LinkFailStatus = (1 << 2), + NetCxnErr = (1 << 1), +}; + +static const u32 de_intr_mask = + IntrOK | IntrErr | RxIntr | RxEmpty | TxIntr | TxEmpty | + LinkPass | LinkFail | PciErr; + +/* + * Set the programmable burst length to 4 longwords for all: + * DMA errors result without these values. Cache align 16 long. + */ +static const u32 de_bus_mode = CacheAlign16 | BurstLen4 | DescSkipLen; + +struct de_srom_media_block { + u8 opts; + u16 csr13; + u16 csr14; + u16 csr15; +} __packed; + +struct de_srom_info_leaf { + u16 default_media; + u8 n_blocks; + u8 unused; +} __packed; + +struct de_desc { + __le32 opts1; + __le32 opts2; + __le32 addr1; + __le32 addr2; +#if DSL + __le32 skip[DSL]; +#endif +}; + +struct media_info { + u16 type; /* DE_MEDIA_xxx */ + u16 csr13; + u16 csr14; + u16 csr15; +}; + +struct ring_info { + struct sk_buff *skb; + dma_addr_t mapping; +}; + +struct de_private { + unsigned tx_head; + unsigned tx_tail; + unsigned rx_tail; + + void __iomem *regs; + struct net_device *dev; + spinlock_t lock; + + struct de_desc *rx_ring; + struct de_desc *tx_ring; + struct ring_info tx_skb[DE_TX_RING_SIZE]; + struct ring_info rx_skb[DE_RX_RING_SIZE]; + unsigned rx_buf_sz; + dma_addr_t ring_dma; + + u32 msg_enable; + + struct pci_dev *pdev; + + u16 setup_frame[DE_SETUP_FRAME_WORDS]; + + u32 media_type; + u32 media_supported; + u32 media_advertise; + struct media_info media[DE_MAX_MEDIA]; + struct timer_list media_timer; + + u8 *ee_data; + unsigned board_idx; + unsigned de21040 : 1; + unsigned media_lock : 1; +}; + + +static void de_set_rx_mode (struct net_device *dev); +static void de_tx (struct de_private *de); +static void de_clean_rings (struct de_private *de); +static void de_media_interrupt (struct de_private *de, u32 status); +static void de21040_media_timer (struct timer_list *t); +static void de21041_media_timer (struct timer_list *t); +static unsigned int de_ok_to_advertise (struct de_private *de, u32 new_media); + + +static const struct pci_device_id de_pci_tbl[] = { + { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_PLUS, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 }, + { }, +}; +MODULE_DEVICE_TABLE(pci, de_pci_tbl); + +static const char * const media_name[DE_MAX_MEDIA] = { + "10baseT auto", + "BNC", + "AUI", + "10baseT-HD", + "10baseT-FD" +}; + +/* 21040 transceiver register settings: + * TP AUTO(unused), BNC(unused), AUI, TP, TP FD*/ +static u16 t21040_csr13[] = { 0, 0, 0x8F09, 0x8F01, 0x8F01, }; +static u16 t21040_csr14[] = { 0, 0, 0x0705, 0xFFFF, 0xFFFD, }; +static u16 t21040_csr15[] = { 0, 0, 0x0006, 0x0000, 0x0000, }; + +/* 21041 transceiver register settings: TP AUTO, BNC, AUI, TP, TP FD*/ +static u16 t21041_csr13[] = { 0xEF01, 0xEF09, 0xEF09, 0xEF01, 0xEF09, }; +static u16 t21041_csr14[] = { 0xFFFF, 0xF7FD, 0xF7FD, 0x7F3F, 0x7F3D, }; +/* If on-chip autonegotiation is broken, use half-duplex (FF3F) instead */ +static u16 t21041_csr14_brk[] = { 0xFF3F, 0xF7FD, 0xF7FD, 0x7F3F, 0x7F3D, }; +static u16 t21041_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, }; + + +#define dr32(reg) ioread32(de->regs + (reg)) +#define dw32(reg, val) iowrite32((val), de->regs + (reg)) + + +static void de_rx_err_acct (struct de_private *de, unsigned rx_tail, + u32 status, u32 len) +{ + netif_dbg(de, rx_err, de->dev, + "rx err, slot %d status 0x%x len %d\n", + rx_tail, status, len); + + if ((status & 0x38000300) != 0x0300) { + /* Ingore earlier buffers. */ + if ((status & 0xffff) != 0x7fff) { + netif_warn(de, rx_err, de->dev, + "Oversized Ethernet frame spanned multiple buffers, status %08x!\n", + status); + de->dev->stats.rx_length_errors++; + } + } else if (status & RxError) { + /* There was a fatal error. */ + de->dev->stats.rx_errors++; /* end of a packet.*/ + if (status & 0x0890) de->dev->stats.rx_length_errors++; + if (status & RxErrCRC) de->dev->stats.rx_crc_errors++; + if (status & RxErrFIFO) de->dev->stats.rx_fifo_errors++; + } +} + +static void de_rx (struct de_private *de) +{ + unsigned rx_tail = de->rx_tail; + unsigned rx_work = DE_RX_RING_SIZE; + unsigned drop = 0; + int rc; + + while (--rx_work) { + u32 status, len; + dma_addr_t mapping; + struct sk_buff *skb, *copy_skb; + unsigned copying_skb, buflen; + + skb = de->rx_skb[rx_tail].skb; + BUG_ON(!skb); + rmb(); + status = le32_to_cpu(de->rx_ring[rx_tail].opts1); + if (status & DescOwn) + break; + + /* the length is actually a 15 bit value here according + * to Table 4-1 in the DE2104x spec so mask is 0x7fff + */ + len = ((status >> 16) & 0x7fff) - 4; + mapping = de->rx_skb[rx_tail].mapping; + + if (unlikely(drop)) { + de->dev->stats.rx_dropped++; + goto rx_next; + } + + if (unlikely((status & 0x38008300) != 0x0300)) { + de_rx_err_acct(de, rx_tail, status, len); + goto rx_next; + } + + copying_skb = (len <= rx_copybreak); + + netif_dbg(de, rx_status, de->dev, + "rx slot %d status 0x%x len %d copying? %d\n", + rx_tail, status, len, copying_skb); + + buflen = copying_skb ? (len + RX_OFFSET) : de->rx_buf_sz; + copy_skb = netdev_alloc_skb(de->dev, buflen); + if (unlikely(!copy_skb)) { + de->dev->stats.rx_dropped++; + drop = 1; + rx_work = 100; + goto rx_next; + } + + if (!copying_skb) { + dma_unmap_single(&de->pdev->dev, mapping, buflen, + DMA_FROM_DEVICE); + skb_put(skb, len); + + mapping = + de->rx_skb[rx_tail].mapping = + dma_map_single(&de->pdev->dev, copy_skb->data, + buflen, DMA_FROM_DEVICE); + de->rx_skb[rx_tail].skb = copy_skb; + } else { + dma_sync_single_for_cpu(&de->pdev->dev, mapping, len, + DMA_FROM_DEVICE); + skb_reserve(copy_skb, RX_OFFSET); + skb_copy_from_linear_data(skb, skb_put(copy_skb, len), + len); + dma_sync_single_for_device(&de->pdev->dev, mapping, + len, DMA_FROM_DEVICE); + + /* We'll reuse the original ring buffer. */ + skb = copy_skb; + } + + skb->protocol = eth_type_trans (skb, de->dev); + + de->dev->stats.rx_packets++; + de->dev->stats.rx_bytes += skb->len; + rc = netif_rx (skb); + if (rc == NET_RX_DROP) + drop = 1; + +rx_next: + if (rx_tail == (DE_RX_RING_SIZE - 1)) + de->rx_ring[rx_tail].opts2 = + cpu_to_le32(RingEnd | de->rx_buf_sz); + else + de->rx_ring[rx_tail].opts2 = cpu_to_le32(de->rx_buf_sz); + de->rx_ring[rx_tail].addr1 = cpu_to_le32(mapping); + wmb(); + de->rx_ring[rx_tail].opts1 = cpu_to_le32(DescOwn); + rx_tail = NEXT_RX(rx_tail); + } + + if (!rx_work) + netdev_warn(de->dev, "rx work limit reached\n"); + + de->rx_tail = rx_tail; +} + +static irqreturn_t de_interrupt (int irq, void *dev_instance) +{ + struct net_device *dev = dev_instance; + struct de_private *de = netdev_priv(dev); + u32 status; + + status = dr32(MacStatus); + if ((!(status & (IntrOK|IntrErr))) || (status == 0xFFFF)) + return IRQ_NONE; + + netif_dbg(de, intr, dev, "intr, status %08x mode %08x desc %u/%u/%u\n", + status, dr32(MacMode), + de->rx_tail, de->tx_head, de->tx_tail); + + dw32(MacStatus, status); + + if (status & (RxIntr | RxEmpty)) { + de_rx(de); + if (status & RxEmpty) + dw32(RxPoll, NormalRxPoll); + } + + spin_lock(&de->lock); + + if (status & (TxIntr | TxEmpty)) + de_tx(de); + + if (status & (LinkPass | LinkFail)) + de_media_interrupt(de, status); + + spin_unlock(&de->lock); + + if (status & PciErr) { + u16 pci_status; + + pci_read_config_word(de->pdev, PCI_STATUS, &pci_status); + pci_write_config_word(de->pdev, PCI_STATUS, pci_status); + netdev_err(de->dev, + "PCI bus error, status=%08x, PCI status=%04x\n", + status, pci_status); + } + + return IRQ_HANDLED; +} + +static void de_tx (struct de_private *de) +{ + unsigned tx_head = de->tx_head; + unsigned tx_tail = de->tx_tail; + + while (tx_tail != tx_head) { + struct sk_buff *skb; + u32 status; + + rmb(); + status = le32_to_cpu(de->tx_ring[tx_tail].opts1); + if (status & DescOwn) + break; + + skb = de->tx_skb[tx_tail].skb; + BUG_ON(!skb); + if (unlikely(skb == DE_DUMMY_SKB)) + goto next; + + if (unlikely(skb == DE_SETUP_SKB)) { + dma_unmap_single(&de->pdev->dev, + de->tx_skb[tx_tail].mapping, + sizeof(de->setup_frame), + DMA_TO_DEVICE); + goto next; + } + + dma_unmap_single(&de->pdev->dev, de->tx_skb[tx_tail].mapping, + skb->len, DMA_TO_DEVICE); + + if (status & LastFrag) { + if (status & TxError) { + netif_dbg(de, tx_err, de->dev, + "tx err, status 0x%x\n", + status); + de->dev->stats.tx_errors++; + if (status & TxOWC) + de->dev->stats.tx_window_errors++; + if (status & TxMaxCol) + de->dev->stats.tx_aborted_errors++; + if (status & TxLinkFail) + de->dev->stats.tx_carrier_errors++; + if (status & TxFIFOUnder) + de->dev->stats.tx_fifo_errors++; + } else { + de->dev->stats.tx_packets++; + de->dev->stats.tx_bytes += skb->len; + netif_dbg(de, tx_done, de->dev, + "tx done, slot %d\n", tx_tail); + } + dev_consume_skb_irq(skb); + } + +next: + de->tx_skb[tx_tail].skb = NULL; + + tx_tail = NEXT_TX(tx_tail); + } + + de->tx_tail = tx_tail; + + if (netif_queue_stopped(de->dev) && (TX_BUFFS_AVAIL(de) > (DE_TX_RING_SIZE / 4))) + netif_wake_queue(de->dev); +} + +static netdev_tx_t de_start_xmit (struct sk_buff *skb, + struct net_device *dev) +{ + struct de_private *de = netdev_priv(dev); + unsigned int entry, tx_free; + u32 mapping, len, flags = FirstFrag | LastFrag; + struct de_desc *txd; + + spin_lock_irq(&de->lock); + + tx_free = TX_BUFFS_AVAIL(de); + if (tx_free == 0) { + netif_stop_queue(dev); + spin_unlock_irq(&de->lock); + return NETDEV_TX_BUSY; + } + tx_free--; + + entry = de->tx_head; + + txd = &de->tx_ring[entry]; + + len = skb->len; + mapping = dma_map_single(&de->pdev->dev, skb->data, len, + DMA_TO_DEVICE); + if (entry == (DE_TX_RING_SIZE - 1)) + flags |= RingEnd; + if (!tx_free || (tx_free == (DE_TX_RING_SIZE / 2))) + flags |= TxSwInt; + flags |= len; + txd->opts2 = cpu_to_le32(flags); + txd->addr1 = cpu_to_le32(mapping); + + de->tx_skb[entry].skb = skb; + de->tx_skb[entry].mapping = mapping; + wmb(); + + txd->opts1 = cpu_to_le32(DescOwn); + wmb(); + + de->tx_head = NEXT_TX(entry); + netif_dbg(de, tx_queued, dev, "tx queued, slot %d, skblen %d\n", + entry, skb->len); + + if (tx_free == 0) + netif_stop_queue(dev); + + spin_unlock_irq(&de->lock); + + /* Trigger an immediate transmit demand. */ + dw32(TxPoll, NormalTxPoll); + + return NETDEV_TX_OK; +} + +/* Set or clear the multicast filter for this adaptor. + Note that we only use exclusion around actually queueing the + new frame, not around filling de->setup_frame. This is non-deterministic + when re-entered but still correct. */ + +static void build_setup_frame_hash(u16 *setup_frm, struct net_device *dev) +{ + struct de_private *de = netdev_priv(dev); + u16 hash_table[32]; + struct netdev_hw_addr *ha; + const u16 *eaddrs; + int i; + + memset(hash_table, 0, sizeof(hash_table)); + __set_bit_le(255, hash_table); /* Broadcast entry */ + /* This should work on big-endian machines as well. */ + netdev_for_each_mc_addr(ha, dev) { + int index = ether_crc_le(ETH_ALEN, ha->addr) & 0x1ff; + + __set_bit_le(index, hash_table); + } + + for (i = 0; i < 32; i++) { + *setup_frm++ = hash_table[i]; + *setup_frm++ = hash_table[i]; + } + setup_frm = &de->setup_frame[13*6]; + + /* Fill the final entry with our physical address. */ + eaddrs = (const u16 *)dev->dev_addr; + *setup_frm++ = eaddrs[0]; *setup_frm++ = eaddrs[0]; + *setup_frm++ = eaddrs[1]; *setup_frm++ = eaddrs[1]; + *setup_frm++ = eaddrs[2]; *setup_frm++ = eaddrs[2]; +} + +static void build_setup_frame_perfect(u16 *setup_frm, struct net_device *dev) +{ + struct de_private *de = netdev_priv(dev); + struct netdev_hw_addr *ha; + const u16 *eaddrs; + + /* We have <= 14 addresses so we can use the wonderful + 16 address perfect filtering of the Tulip. */ + netdev_for_each_mc_addr(ha, dev) { + eaddrs = (u16 *) ha->addr; + *setup_frm++ = *eaddrs; *setup_frm++ = *eaddrs++; + *setup_frm++ = *eaddrs; *setup_frm++ = *eaddrs++; + *setup_frm++ = *eaddrs; *setup_frm++ = *eaddrs++; + } + /* Fill the unused entries with the broadcast address. */ + memset(setup_frm, 0xff, (15 - netdev_mc_count(dev)) * 12); + setup_frm = &de->setup_frame[15*6]; + + /* Fill the final entry with our physical address. */ + eaddrs = (const u16 *)dev->dev_addr; + *setup_frm++ = eaddrs[0]; *setup_frm++ = eaddrs[0]; + *setup_frm++ = eaddrs[1]; *setup_frm++ = eaddrs[1]; + *setup_frm++ = eaddrs[2]; *setup_frm++ = eaddrs[2]; +} + + +static void __de_set_rx_mode (struct net_device *dev) +{ + struct de_private *de = netdev_priv(dev); + u32 macmode; + unsigned int entry; + u32 mapping; + struct de_desc *txd; + struct de_desc *dummy_txd = NULL; + + macmode = dr32(MacMode) & ~(AcceptAllMulticast | AcceptAllPhys); + + if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ + macmode |= AcceptAllMulticast | AcceptAllPhys; + goto out; + } + + if ((netdev_mc_count(dev) > 1000) || (dev->flags & IFF_ALLMULTI)) { + /* Too many to filter well -- accept all multicasts. */ + macmode |= AcceptAllMulticast; + goto out; + } + + /* Note that only the low-address shortword of setup_frame is valid! + The values are doubled for big-endian architectures. */ + if (netdev_mc_count(dev) > 14) /* Must use a multicast hash table. */ + build_setup_frame_hash (de->setup_frame, dev); + else + build_setup_frame_perfect (de->setup_frame, dev); + + /* + * Now add this frame to the Tx list. + */ + + entry = de->tx_head; + + /* Avoid a chip errata by prefixing a dummy entry. */ + if (entry != 0) { + de->tx_skb[entry].skb = DE_DUMMY_SKB; + + dummy_txd = &de->tx_ring[entry]; + dummy_txd->opts2 = (entry == (DE_TX_RING_SIZE - 1)) ? + cpu_to_le32(RingEnd) : 0; + dummy_txd->addr1 = 0; + + /* Must set DescOwned later to avoid race with chip */ + + entry = NEXT_TX(entry); + } + + de->tx_skb[entry].skb = DE_SETUP_SKB; + de->tx_skb[entry].mapping = mapping = + dma_map_single(&de->pdev->dev, de->setup_frame, + sizeof(de->setup_frame), DMA_TO_DEVICE); + + /* Put the setup frame on the Tx list. */ + txd = &de->tx_ring[entry]; + if (entry == (DE_TX_RING_SIZE - 1)) + txd->opts2 = cpu_to_le32(SetupFrame | RingEnd | sizeof (de->setup_frame)); + else + txd->opts2 = cpu_to_le32(SetupFrame | sizeof (de->setup_frame)); + txd->addr1 = cpu_to_le32(mapping); + wmb(); + + txd->opts1 = cpu_to_le32(DescOwn); + wmb(); + + if (dummy_txd) { + dummy_txd->opts1 = cpu_to_le32(DescOwn); + wmb(); + } + + de->tx_head = NEXT_TX(entry); + + if (TX_BUFFS_AVAIL(de) == 0) + netif_stop_queue(dev); + + /* Trigger an immediate transmit demand. */ + dw32(TxPoll, NormalTxPoll); + +out: + if (macmode != dr32(MacMode)) + dw32(MacMode, macmode); +} + +static void de_set_rx_mode (struct net_device *dev) +{ + unsigned long flags; + struct de_private *de = netdev_priv(dev); + + spin_lock_irqsave (&de->lock, flags); + __de_set_rx_mode(dev); + spin_unlock_irqrestore (&de->lock, flags); +} + +static inline void de_rx_missed(struct de_private *de, u32 rx_missed) +{ + if (unlikely(rx_missed & RxMissedOver)) + de->dev->stats.rx_missed_errors += RxMissedMask; + else + de->dev->stats.rx_missed_errors += (rx_missed & RxMissedMask); +} + +static void __de_get_stats(struct de_private *de) +{ + u32 tmp = dr32(RxMissed); /* self-clearing */ + + de_rx_missed(de, tmp); +} + +static struct net_device_stats *de_get_stats(struct net_device *dev) +{ + struct de_private *de = netdev_priv(dev); + + /* The chip only need report frame silently dropped. */ + spin_lock_irq(&de->lock); + if (netif_running(dev) && netif_device_present(dev)) + __de_get_stats(de); + spin_unlock_irq(&de->lock); + + return &dev->stats; +} + +static inline int de_is_running (struct de_private *de) +{ + return (dr32(MacStatus) & (RxState | TxState)) ? 1 : 0; +} + +static void de_stop_rxtx (struct de_private *de) +{ + u32 macmode; + unsigned int i = 1300/100; + + macmode = dr32(MacMode); + if (macmode & RxTx) { + dw32(MacMode, macmode & ~RxTx); + dr32(MacMode); + } + + /* wait until in-flight frame completes. + * Max time @ 10BT: 1500*8b/10Mbps == 1200us (+ 100us margin) + * Typically expect this loop to end in < 50 us on 100BT. + */ + while (--i) { + if (!de_is_running(de)) + return; + udelay(100); + } + + netdev_warn(de->dev, "timeout expired, stopping DMA\n"); +} + +static inline void de_start_rxtx (struct de_private *de) +{ + u32 macmode; + + macmode = dr32(MacMode); + if ((macmode & RxTx) != RxTx) { + dw32(MacMode, macmode | RxTx); + dr32(MacMode); + } +} + +static void de_stop_hw (struct de_private *de) +{ + + udelay(5); + dw32(IntrMask, 0); + + de_stop_rxtx(de); + + dw32(MacStatus, dr32(MacStatus)); + + udelay(10); + + de->rx_tail = 0; + de->tx_head = de->tx_tail = 0; +} + +static void de_link_up(struct de_private *de) +{ + if (!netif_carrier_ok(de->dev)) { + netif_carrier_on(de->dev); + netif_info(de, link, de->dev, "link up, media %s\n", + media_name[de->media_type]); + } +} + +static void de_link_down(struct de_private *de) +{ + if (netif_carrier_ok(de->dev)) { + netif_carrier_off(de->dev); + netif_info(de, link, de->dev, "link down\n"); + } +} + +static void de_set_media (struct de_private *de) +{ + unsigned media = de->media_type; + u32 macmode = dr32(MacMode); + + if (de_is_running(de)) + netdev_warn(de->dev, "chip is running while changing media!\n"); + + if (de->de21040) + dw32(CSR11, FULL_DUPLEX_MAGIC); + dw32(CSR13, 0); /* Reset phy */ + dw32(CSR14, de->media[media].csr14); + dw32(CSR15, de->media[media].csr15); + dw32(CSR13, de->media[media].csr13); + + /* must delay 10ms before writing to other registers, + * especially CSR6 + */ + mdelay(10); + + if (media == DE_MEDIA_TP_FD) + macmode |= FullDuplex; + else + macmode &= ~FullDuplex; + + netif_info(de, link, de->dev, "set link %s\n", media_name[media]); + netif_info(de, hw, de->dev, "mode 0x%x, sia 0x%x,0x%x,0x%x,0x%x\n", + dr32(MacMode), dr32(SIAStatus), + dr32(CSR13), dr32(CSR14), dr32(CSR15)); + netif_info(de, hw, de->dev, "set mode 0x%x, set sia 0x%x,0x%x,0x%x\n", + macmode, de->media[media].csr13, + de->media[media].csr14, de->media[media].csr15); + if (macmode != dr32(MacMode)) + dw32(MacMode, macmode); +} + +static void de_next_media (struct de_private *de, const u32 *media, + unsigned int n_media) +{ + unsigned int i; + + for (i = 0; i < n_media; i++) { + if (de_ok_to_advertise(de, media[i])) { + de->media_type = media[i]; + return; + } + } +} + +static void de21040_media_timer (struct timer_list *t) +{ + struct de_private *de = from_timer(de, t, media_timer); + struct net_device *dev = de->dev; + u32 status = dr32(SIAStatus); + unsigned int carrier; + unsigned long flags; + + carrier = (status & NetCxnErr) ? 0 : 1; + + if (carrier) { + if (de->media_type != DE_MEDIA_AUI && (status & LinkFailStatus)) + goto no_link_yet; + + de->media_timer.expires = jiffies + DE_TIMER_LINK; + add_timer(&de->media_timer); + if (!netif_carrier_ok(dev)) + de_link_up(de); + else + netif_info(de, timer, dev, "%s link ok, status %x\n", + media_name[de->media_type], status); + return; + } + + de_link_down(de); + + if (de->media_lock) + return; + + if (de->media_type == DE_MEDIA_AUI) { + static const u32 next_state = DE_MEDIA_TP; + de_next_media(de, &next_state, 1); + } else { + static const u32 next_state = DE_MEDIA_AUI; + de_next_media(de, &next_state, 1); + } + + spin_lock_irqsave(&de->lock, flags); + de_stop_rxtx(de); + spin_unlock_irqrestore(&de->lock, flags); + de_set_media(de); + de_start_rxtx(de); + +no_link_yet: + de->media_timer.expires = jiffies + DE_TIMER_NO_LINK; + add_timer(&de->media_timer); + + netif_info(de, timer, dev, "no link, trying media %s, status %x\n", + media_name[de->media_type], status); +} + +static unsigned int de_ok_to_advertise (struct de_private *de, u32 new_media) +{ + switch (new_media) { + case DE_MEDIA_TP_AUTO: + if (!(de->media_advertise & ADVERTISED_Autoneg)) + return 0; + if (!(de->media_advertise & (ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full))) + return 0; + break; + case DE_MEDIA_BNC: + if (!(de->media_advertise & ADVERTISED_BNC)) + return 0; + break; + case DE_MEDIA_AUI: + if (!(de->media_advertise & ADVERTISED_AUI)) + return 0; + break; + case DE_MEDIA_TP: + if (!(de->media_advertise & ADVERTISED_10baseT_Half)) + return 0; + break; + case DE_MEDIA_TP_FD: + if (!(de->media_advertise & ADVERTISED_10baseT_Full)) + return 0; + break; + } + + return 1; +} + +static void de21041_media_timer (struct timer_list *t) +{ + struct de_private *de = from_timer(de, t, media_timer); + struct net_device *dev = de->dev; + u32 status = dr32(SIAStatus); + unsigned int carrier; + unsigned long flags; + + /* clear port active bits */ + dw32(SIAStatus, NonselPortActive | SelPortActive); + + carrier = (status & NetCxnErr) ? 0 : 1; + + if (carrier) { + if ((de->media_type == DE_MEDIA_TP_AUTO || + de->media_type == DE_MEDIA_TP || + de->media_type == DE_MEDIA_TP_FD) && + (status & LinkFailStatus)) + goto no_link_yet; + + de->media_timer.expires = jiffies + DE_TIMER_LINK; + add_timer(&de->media_timer); + if (!netif_carrier_ok(dev)) + de_link_up(de); + else + netif_info(de, timer, dev, + "%s link ok, mode %x status %x\n", + media_name[de->media_type], + dr32(MacMode), status); + return; + } + + de_link_down(de); + + /* if media type locked, don't switch media */ + if (de->media_lock) + goto set_media; + + /* if activity detected, use that as hint for new media type */ + if (status & NonselPortActive) { + unsigned int have_media = 1; + + /* if AUI/BNC selected, then activity is on TP port */ + if (de->media_type == DE_MEDIA_AUI || + de->media_type == DE_MEDIA_BNC) { + if (de_ok_to_advertise(de, DE_MEDIA_TP_AUTO)) + de->media_type = DE_MEDIA_TP_AUTO; + else + have_media = 0; + } + + /* TP selected. If there is only TP and BNC, then it's BNC */ + else if (((de->media_supported & DE_AUI_BNC) == SUPPORTED_BNC) && + de_ok_to_advertise(de, DE_MEDIA_BNC)) + de->media_type = DE_MEDIA_BNC; + + /* TP selected. If there is only TP and AUI, then it's AUI */ + else if (((de->media_supported & DE_AUI_BNC) == SUPPORTED_AUI) && + de_ok_to_advertise(de, DE_MEDIA_AUI)) + de->media_type = DE_MEDIA_AUI; + + /* otherwise, ignore the hint */ + else + have_media = 0; + + if (have_media) + goto set_media; + } + + /* + * Absent or ambiguous activity hint, move to next advertised + * media state. If de->media_type is left unchanged, this + * simply resets the PHY and reloads the current media settings. + */ + if (de->media_type == DE_MEDIA_AUI) { + static const u32 next_states[] = { + DE_MEDIA_BNC, DE_MEDIA_TP_AUTO + }; + de_next_media(de, next_states, ARRAY_SIZE(next_states)); + } else if (de->media_type == DE_MEDIA_BNC) { + static const u32 next_states[] = { + DE_MEDIA_TP_AUTO, DE_MEDIA_AUI + }; + de_next_media(de, next_states, ARRAY_SIZE(next_states)); + } else { + static const u32 next_states[] = { + DE_MEDIA_AUI, DE_MEDIA_BNC, DE_MEDIA_TP_AUTO + }; + de_next_media(de, next_states, ARRAY_SIZE(next_states)); + } + +set_media: + spin_lock_irqsave(&de->lock, flags); + de_stop_rxtx(de); + spin_unlock_irqrestore(&de->lock, flags); + de_set_media(de); + de_start_rxtx(de); + +no_link_yet: + de->media_timer.expires = jiffies + DE_TIMER_NO_LINK; + add_timer(&de->media_timer); + + netif_info(de, timer, dev, "no link, trying media %s, status %x\n", + media_name[de->media_type], status); +} + +static void de_media_interrupt (struct de_private *de, u32 status) +{ + if (status & LinkPass) { + /* Ignore if current media is AUI or BNC and we can't use TP */ + if ((de->media_type == DE_MEDIA_AUI || + de->media_type == DE_MEDIA_BNC) && + (de->media_lock || + !de_ok_to_advertise(de, DE_MEDIA_TP_AUTO))) + return; + /* If current media is not TP, change it to TP */ + if ((de->media_type == DE_MEDIA_AUI || + de->media_type == DE_MEDIA_BNC)) { + de->media_type = DE_MEDIA_TP_AUTO; + de_stop_rxtx(de); + de_set_media(de); + de_start_rxtx(de); + } + de_link_up(de); + mod_timer(&de->media_timer, jiffies + DE_TIMER_LINK); + return; + } + + BUG_ON(!(status & LinkFail)); + /* Mark the link as down only if current media is TP */ + if (netif_carrier_ok(de->dev) && de->media_type != DE_MEDIA_AUI && + de->media_type != DE_MEDIA_BNC) { + de_link_down(de); + mod_timer(&de->media_timer, jiffies + DE_TIMER_NO_LINK); + } +} + +static int de_reset_mac (struct de_private *de) +{ + u32 status, tmp; + + /* + * Reset MAC. de4x5.c and tulip.c examined for "advice" + * in this area. + */ + + if (dr32(BusMode) == 0xffffffff) + return -EBUSY; + + /* Reset the chip, holding bit 0 set at least 50 PCI cycles. */ + dw32 (BusMode, CmdReset); + mdelay (1); + + dw32 (BusMode, de_bus_mode); + mdelay (1); + + for (tmp = 0; tmp < 5; tmp++) { + dr32 (BusMode); + mdelay (1); + } + + mdelay (1); + + status = dr32(MacStatus); + if (status & (RxState | TxState)) + return -EBUSY; + if (status == 0xffffffff) + return -ENODEV; + return 0; +} + +static void de_adapter_wake (struct de_private *de) +{ + u32 pmctl; + + if (de->de21040) + return; + + pci_read_config_dword(de->pdev, PCIPM, &pmctl); + if (pmctl & PM_Mask) { + pmctl &= ~PM_Mask; + pci_write_config_dword(de->pdev, PCIPM, pmctl); + + /* de4x5.c delays, so we do too */ + msleep(10); + } +} + +static void de_adapter_sleep (struct de_private *de) +{ + u32 pmctl; + + if (de->de21040) + return; + + dw32(CSR13, 0); /* Reset phy */ + pci_read_config_dword(de->pdev, PCIPM, &pmctl); + pmctl |= PM_Sleep; + pci_write_config_dword(de->pdev, PCIPM, pmctl); +} + +static int de_init_hw (struct de_private *de) +{ + struct net_device *dev = de->dev; + u32 macmode; + int rc; + + de_adapter_wake(de); + + macmode = dr32(MacMode) & ~MacModeClear; + + rc = de_reset_mac(de); + if (rc) + return rc; + + de_set_media(de); /* reset phy */ + + dw32(RxRingAddr, de->ring_dma); + dw32(TxRingAddr, de->ring_dma + (sizeof(struct de_desc) * DE_RX_RING_SIZE)); + + dw32(MacMode, RxTx | macmode); + + dr32(RxMissed); /* self-clearing */ + + dw32(IntrMask, de_intr_mask); + + de_set_rx_mode(dev); + + return 0; +} + +static int de_refill_rx (struct de_private *de) +{ + unsigned i; + + for (i = 0; i < DE_RX_RING_SIZE; i++) { + struct sk_buff *skb; + + skb = netdev_alloc_skb(de->dev, de->rx_buf_sz); + if (!skb) + goto err_out; + + de->rx_skb[i].mapping = dma_map_single(&de->pdev->dev, + skb->data, + de->rx_buf_sz, + DMA_FROM_DEVICE); + de->rx_skb[i].skb = skb; + + de->rx_ring[i].opts1 = cpu_to_le32(DescOwn); + if (i == (DE_RX_RING_SIZE - 1)) + de->rx_ring[i].opts2 = + cpu_to_le32(RingEnd | de->rx_buf_sz); + else + de->rx_ring[i].opts2 = cpu_to_le32(de->rx_buf_sz); + de->rx_ring[i].addr1 = cpu_to_le32(de->rx_skb[i].mapping); + de->rx_ring[i].addr2 = 0; + } + + return 0; + +err_out: + de_clean_rings(de); + return -ENOMEM; +} + +static int de_init_rings (struct de_private *de) +{ + memset(de->tx_ring, 0, sizeof(struct de_desc) * DE_TX_RING_SIZE); + de->tx_ring[DE_TX_RING_SIZE - 1].opts2 = cpu_to_le32(RingEnd); + + de->rx_tail = 0; + de->tx_head = de->tx_tail = 0; + + return de_refill_rx (de); +} + +static int de_alloc_rings (struct de_private *de) +{ + de->rx_ring = dma_alloc_coherent(&de->pdev->dev, DE_RING_BYTES, + &de->ring_dma, GFP_KERNEL); + if (!de->rx_ring) + return -ENOMEM; + de->tx_ring = &de->rx_ring[DE_RX_RING_SIZE]; + return de_init_rings(de); +} + +static void de_clean_rings (struct de_private *de) +{ + unsigned i; + + memset(de->rx_ring, 0, sizeof(struct de_desc) * DE_RX_RING_SIZE); + de->rx_ring[DE_RX_RING_SIZE - 1].opts2 = cpu_to_le32(RingEnd); + wmb(); + memset(de->tx_ring, 0, sizeof(struct de_desc) * DE_TX_RING_SIZE); + de->tx_ring[DE_TX_RING_SIZE - 1].opts2 = cpu_to_le32(RingEnd); + wmb(); + + for (i = 0; i < DE_RX_RING_SIZE; i++) { + if (de->rx_skb[i].skb) { + dma_unmap_single(&de->pdev->dev, + de->rx_skb[i].mapping, de->rx_buf_sz, + DMA_FROM_DEVICE); + dev_kfree_skb(de->rx_skb[i].skb); + } + } + + for (i = 0; i < DE_TX_RING_SIZE; i++) { + struct sk_buff *skb = de->tx_skb[i].skb; + if ((skb) && (skb != DE_DUMMY_SKB)) { + if (skb != DE_SETUP_SKB) { + de->dev->stats.tx_dropped++; + dma_unmap_single(&de->pdev->dev, + de->tx_skb[i].mapping, + skb->len, DMA_TO_DEVICE); + dev_kfree_skb(skb); + } else { + dma_unmap_single(&de->pdev->dev, + de->tx_skb[i].mapping, + sizeof(de->setup_frame), + DMA_TO_DEVICE); + } + } + } + + memset(&de->rx_skb, 0, sizeof(struct ring_info) * DE_RX_RING_SIZE); + memset(&de->tx_skb, 0, sizeof(struct ring_info) * DE_TX_RING_SIZE); +} + +static void de_free_rings (struct de_private *de) +{ + de_clean_rings(de); + dma_free_coherent(&de->pdev->dev, DE_RING_BYTES, de->rx_ring, + de->ring_dma); + de->rx_ring = NULL; + de->tx_ring = NULL; +} + +static int de_open (struct net_device *dev) +{ + struct de_private *de = netdev_priv(dev); + const int irq = de->pdev->irq; + int rc; + + netif_dbg(de, ifup, dev, "enabling interface\n"); + + de->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32); + + rc = de_alloc_rings(de); + if (rc) { + netdev_err(dev, "ring allocation failure, err=%d\n", rc); + return rc; + } + + dw32(IntrMask, 0); + + rc = request_irq(irq, de_interrupt, IRQF_SHARED, dev->name, dev); + if (rc) { + netdev_err(dev, "IRQ %d request failure, err=%d\n", irq, rc); + goto err_out_free; + } + + rc = de_init_hw(de); + if (rc) { + netdev_err(dev, "h/w init failure, err=%d\n", rc); + goto err_out_free_irq; + } + + netif_start_queue(dev); + mod_timer(&de->media_timer, jiffies + DE_TIMER_NO_LINK); + + return 0; + +err_out_free_irq: + free_irq(irq, dev); +err_out_free: + de_free_rings(de); + return rc; +} + +static int de_close (struct net_device *dev) +{ + struct de_private *de = netdev_priv(dev); + unsigned long flags; + + netif_dbg(de, ifdown, dev, "disabling interface\n"); + + del_timer_sync(&de->media_timer); + + spin_lock_irqsave(&de->lock, flags); + de_stop_hw(de); + netif_stop_queue(dev); + netif_carrier_off(dev); + spin_unlock_irqrestore(&de->lock, flags); + + free_irq(de->pdev->irq, dev); + + de_free_rings(de); + de_adapter_sleep(de); + return 0; +} + +static void de_tx_timeout (struct net_device *dev, unsigned int txqueue) +{ + struct de_private *de = netdev_priv(dev); + const int irq = de->pdev->irq; + + netdev_dbg(dev, "NIC status %08x mode %08x sia %08x desc %u/%u/%u\n", + dr32(MacStatus), dr32(MacMode), dr32(SIAStatus), + de->rx_tail, de->tx_head, de->tx_tail); + + del_timer_sync(&de->media_timer); + + disable_irq(irq); + spin_lock_irq(&de->lock); + + de_stop_hw(de); + netif_stop_queue(dev); + netif_carrier_off(dev); + + spin_unlock_irq(&de->lock); + enable_irq(irq); + + /* Update the error counts. */ + __de_get_stats(de); + + synchronize_irq(irq); + de_clean_rings(de); + + de_init_rings(de); + + de_init_hw(de); + + netif_wake_queue(dev); +} + +static void __de_get_regs(struct de_private *de, u8 *buf) +{ + int i; + u32 *rbuf = (u32 *)buf; + + /* read all CSRs */ + for (i = 0; i < DE_NUM_REGS; i++) + rbuf[i] = dr32(i * 8); + + /* handle self-clearing RxMissed counter, CSR8 */ + de_rx_missed(de, rbuf[8]); +} + +static void __de_get_link_ksettings(struct de_private *de, + struct ethtool_link_ksettings *cmd) +{ + ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, + de->media_supported); + cmd->base.phy_address = 0; + ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, + de->media_advertise); + + switch (de->media_type) { + case DE_MEDIA_AUI: + cmd->base.port = PORT_AUI; + break; + case DE_MEDIA_BNC: + cmd->base.port = PORT_BNC; + break; + default: + cmd->base.port = PORT_TP; + break; + } + + cmd->base.speed = 10; + + if (dr32(MacMode) & FullDuplex) + cmd->base.duplex = DUPLEX_FULL; + else + cmd->base.duplex = DUPLEX_HALF; + + if (de->media_lock) + cmd->base.autoneg = AUTONEG_DISABLE; + else + cmd->base.autoneg = AUTONEG_ENABLE; + + /* ignore maxtxpkt, maxrxpkt for now */ +} + +static int __de_set_link_ksettings(struct de_private *de, + const struct ethtool_link_ksettings *cmd) +{ + u32 new_media; + unsigned int media_lock; + u8 duplex = cmd->base.duplex; + u8 port = cmd->base.port; + u8 autoneg = cmd->base.autoneg; + u32 advertising; + + ethtool_convert_link_mode_to_legacy_u32(&advertising, + cmd->link_modes.advertising); + + if (cmd->base.speed != 10) + return -EINVAL; + if (duplex != DUPLEX_HALF && duplex != DUPLEX_FULL) + return -EINVAL; + if (port != PORT_TP && port != PORT_AUI && port != PORT_BNC) + return -EINVAL; + if (de->de21040 && port == PORT_BNC) + return -EINVAL; + if (autoneg != AUTONEG_DISABLE && autoneg != AUTONEG_ENABLE) + return -EINVAL; + if (advertising & ~de->media_supported) + return -EINVAL; + if (autoneg == AUTONEG_ENABLE && + (!(advertising & ADVERTISED_Autoneg))) + return -EINVAL; + + switch (port) { + case PORT_AUI: + new_media = DE_MEDIA_AUI; + if (!(advertising & ADVERTISED_AUI)) + return -EINVAL; + break; + case PORT_BNC: + new_media = DE_MEDIA_BNC; + if (!(advertising & ADVERTISED_BNC)) + return -EINVAL; + break; + default: + if (autoneg == AUTONEG_ENABLE) + new_media = DE_MEDIA_TP_AUTO; + else if (duplex == DUPLEX_FULL) + new_media = DE_MEDIA_TP_FD; + else + new_media = DE_MEDIA_TP; + if (!(advertising & ADVERTISED_TP)) + return -EINVAL; + if (!(advertising & (ADVERTISED_10baseT_Full | + ADVERTISED_10baseT_Half))) + return -EINVAL; + break; + } + + media_lock = (autoneg == AUTONEG_ENABLE) ? 0 : 1; + + if ((new_media == de->media_type) && + (media_lock == de->media_lock) && + (advertising == de->media_advertise)) + return 0; /* nothing to change */ + + de_link_down(de); + mod_timer(&de->media_timer, jiffies + DE_TIMER_NO_LINK); + de_stop_rxtx(de); + + de->media_type = new_media; + de->media_lock = media_lock; + de->media_advertise = advertising; + de_set_media(de); + if (netif_running(de->dev)) + de_start_rxtx(de); + + return 0; +} + +static void de_get_drvinfo (struct net_device *dev,struct ethtool_drvinfo *info) +{ + struct de_private *de = netdev_priv(dev); + + strscpy(info->driver, DRV_NAME, sizeof(info->driver)); + strscpy(info->bus_info, pci_name(de->pdev), sizeof(info->bus_info)); +} + +static int de_get_regs_len(struct net_device *dev) +{ + return DE_REGS_SIZE; +} + +static int de_get_link_ksettings(struct net_device *dev, + struct ethtool_link_ksettings *cmd) +{ + struct de_private *de = netdev_priv(dev); + + spin_lock_irq(&de->lock); + __de_get_link_ksettings(de, cmd); + spin_unlock_irq(&de->lock); + + return 0; +} + +static int de_set_link_ksettings(struct net_device *dev, + const struct ethtool_link_ksettings *cmd) +{ + struct de_private *de = netdev_priv(dev); + int rc; + + spin_lock_irq(&de->lock); + rc = __de_set_link_ksettings(de, cmd); + spin_unlock_irq(&de->lock); + + return rc; +} + +static u32 de_get_msglevel(struct net_device *dev) +{ + struct de_private *de = netdev_priv(dev); + + return de->msg_enable; +} + +static void de_set_msglevel(struct net_device *dev, u32 msglvl) +{ + struct de_private *de = netdev_priv(dev); + + de->msg_enable = msglvl; +} + +static int de_get_eeprom(struct net_device *dev, + struct ethtool_eeprom *eeprom, u8 *data) +{ + struct de_private *de = netdev_priv(dev); + + if (!de->ee_data) + return -EOPNOTSUPP; + if ((eeprom->offset != 0) || (eeprom->magic != 0) || + (eeprom->len != DE_EEPROM_SIZE)) + return -EINVAL; + memcpy(data, de->ee_data, eeprom->len); + + return 0; +} + +static int de_nway_reset(struct net_device *dev) +{ + struct de_private *de = netdev_priv(dev); + u32 status; + + if (de->media_type != DE_MEDIA_TP_AUTO) + return -EINVAL; + if (netif_carrier_ok(de->dev)) + de_link_down(de); + + status = dr32(SIAStatus); + dw32(SIAStatus, (status & ~NWayState) | NWayRestart); + netif_info(de, link, dev, "link nway restart, status %x,%x\n", + status, dr32(SIAStatus)); + return 0; +} + +static void de_get_regs(struct net_device *dev, struct ethtool_regs *regs, + void *data) +{ + struct de_private *de = netdev_priv(dev); + + regs->version = (DE_REGS_VER << 2) | de->de21040; + + spin_lock_irq(&de->lock); + __de_get_regs(de, data); + spin_unlock_irq(&de->lock); +} + +static const struct ethtool_ops de_ethtool_ops = { + .get_link = ethtool_op_get_link, + .get_drvinfo = de_get_drvinfo, + .get_regs_len = de_get_regs_len, + .get_msglevel = de_get_msglevel, + .set_msglevel = de_set_msglevel, + .get_eeprom = de_get_eeprom, + .nway_reset = de_nway_reset, + .get_regs = de_get_regs, + .get_link_ksettings = de_get_link_ksettings, + .set_link_ksettings = de_set_link_ksettings, +}; + +static void de21040_get_mac_address(struct de_private *de) +{ + u8 addr[ETH_ALEN]; + unsigned i; + + dw32 (ROMCmd, 0); /* Reset the pointer with a dummy write. */ + udelay(5); + + for (i = 0; i < 6; i++) { + int value, boguscnt = 100000; + do { + value = dr32(ROMCmd); + rmb(); + } while (value < 0 && --boguscnt > 0); + addr[i] = value; + udelay(1); + if (boguscnt <= 0) + pr_warn("timeout reading 21040 MAC address byte %u\n", + i); + } + eth_hw_addr_set(de->dev, addr); +} + +static void de21040_get_media_info(struct de_private *de) +{ + unsigned int i; + + de->media_type = DE_MEDIA_TP; + de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Full | + SUPPORTED_10baseT_Half | SUPPORTED_AUI; + de->media_advertise = de->media_supported; + + for (i = 0; i < DE_MAX_MEDIA; i++) { + switch (i) { + case DE_MEDIA_AUI: + case DE_MEDIA_TP: + case DE_MEDIA_TP_FD: + de->media[i].type = i; + de->media[i].csr13 = t21040_csr13[i]; + de->media[i].csr14 = t21040_csr14[i]; + de->media[i].csr15 = t21040_csr15[i]; + break; + default: + de->media[i].type = DE_MEDIA_INVALID; + break; + } + } +} + +/* Note: this routine returns extra data bits for size detection. */ +static unsigned tulip_read_eeprom(void __iomem *regs, int location, + int addr_len) +{ + int i; + unsigned retval = 0; + void __iomem *ee_addr = regs + ROMCmd; + int read_cmd = location | (EE_READ_CMD << addr_len); + + writel(EE_ENB & ~EE_CS, ee_addr); + writel(EE_ENB, ee_addr); + + /* Shift the read command bits out. */ + for (i = 4 + addr_len; i >= 0; i--) { + short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0; + writel(EE_ENB | dataval, ee_addr); + readl(ee_addr); + writel(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr); + readl(ee_addr); + retval = (retval << 1) | ((readl(ee_addr) & EE_DATA_READ) ? 1 : 0); + } + writel(EE_ENB, ee_addr); + readl(ee_addr); + + for (i = 16; i > 0; i--) { + writel(EE_ENB | EE_SHIFT_CLK, ee_addr); + readl(ee_addr); + retval = (retval << 1) | ((readl(ee_addr) & EE_DATA_READ) ? 1 : 0); + writel(EE_ENB, ee_addr); + readl(ee_addr); + } + + /* Terminate the EEPROM access. */ + writel(EE_ENB & ~EE_CS, ee_addr); + return retval; +} + +static void de21041_get_srom_info(struct de_private *de) +{ + unsigned i, sa_offset = 0, ofs; + u8 ee_data[DE_EEPROM_SIZE + 6] = {}; + unsigned ee_addr_size = tulip_read_eeprom(de->regs, 0xff, 8) & 0x40000 ? 8 : 6; + struct de_srom_info_leaf *il; + void *bufp; + + /* download entire eeprom */ + for (i = 0; i < DE_EEPROM_WORDS; i++) + ((__le16 *)ee_data)[i] = + cpu_to_le16(tulip_read_eeprom(de->regs, i, ee_addr_size)); + + /* DEC now has a specification but early board makers + just put the address in the first EEPROM locations. */ + /* This does memcmp(eedata, eedata+16, 8) */ + +#ifndef CONFIG_MIPS_COBALT + + for (i = 0; i < 8; i ++) + if (ee_data[i] != ee_data[16+i]) + sa_offset = 20; + +#endif + + /* store MAC address */ + eth_hw_addr_set(de->dev, &ee_data[sa_offset]); + + /* get offset of controller 0 info leaf. ignore 2nd byte. */ + ofs = ee_data[SROMC0InfoLeaf]; + if (ofs >= (sizeof(ee_data) - sizeof(struct de_srom_info_leaf) - sizeof(struct de_srom_media_block))) + goto bad_srom; + + /* get pointer to info leaf */ + il = (struct de_srom_info_leaf *) &ee_data[ofs]; + + /* paranoia checks */ + if (il->n_blocks == 0) + goto bad_srom; + if ((sizeof(ee_data) - ofs) < + (sizeof(struct de_srom_info_leaf) + (sizeof(struct de_srom_media_block) * il->n_blocks))) + goto bad_srom; + + /* get default media type */ + switch (get_unaligned(&il->default_media)) { + case 0x0001: de->media_type = DE_MEDIA_BNC; break; + case 0x0002: de->media_type = DE_MEDIA_AUI; break; + case 0x0204: de->media_type = DE_MEDIA_TP_FD; break; + default: de->media_type = DE_MEDIA_TP_AUTO; break; + } + + if (netif_msg_probe(de)) + pr_info("de%d: SROM leaf offset %u, default media %s\n", + de->board_idx, ofs, media_name[de->media_type]); + + /* init SIA register values to defaults */ + for (i = 0; i < DE_MAX_MEDIA; i++) { + de->media[i].type = DE_MEDIA_INVALID; + de->media[i].csr13 = 0xffff; + de->media[i].csr14 = 0xffff; + de->media[i].csr15 = 0xffff; + } + + /* parse media blocks to see what medias are supported, + * and if any custom CSR values are provided + */ + bufp = ((void *)il) + sizeof(*il); + for (i = 0; i < il->n_blocks; i++) { + struct de_srom_media_block *ib = bufp; + unsigned idx; + + /* index based on media type in media block */ + switch(ib->opts & MediaBlockMask) { + case 0: /* 10baseT */ + de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Half + | SUPPORTED_Autoneg; + idx = DE_MEDIA_TP; + de->media[DE_MEDIA_TP_AUTO].type = DE_MEDIA_TP_AUTO; + break; + case 1: /* BNC */ + de->media_supported |= SUPPORTED_BNC; + idx = DE_MEDIA_BNC; + break; + case 2: /* AUI */ + de->media_supported |= SUPPORTED_AUI; + idx = DE_MEDIA_AUI; + break; + case 4: /* 10baseT-FD */ + de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Full + | SUPPORTED_Autoneg; + idx = DE_MEDIA_TP_FD; + de->media[DE_MEDIA_TP_AUTO].type = DE_MEDIA_TP_AUTO; + break; + default: + goto bad_srom; + } + + de->media[idx].type = idx; + + if (netif_msg_probe(de)) + pr_info("de%d: media block #%u: %s", + de->board_idx, i, + media_name[de->media[idx].type]); + + bufp += sizeof (ib->opts); + + if (ib->opts & MediaCustomCSRs) { + de->media[idx].csr13 = get_unaligned(&ib->csr13); + de->media[idx].csr14 = get_unaligned(&ib->csr14); + de->media[idx].csr15 = get_unaligned(&ib->csr15); + bufp += sizeof(ib->csr13) + sizeof(ib->csr14) + + sizeof(ib->csr15); + + if (netif_msg_probe(de)) + pr_cont(" (%x,%x,%x)\n", + de->media[idx].csr13, + de->media[idx].csr14, + de->media[idx].csr15); + + } else { + if (netif_msg_probe(de)) + pr_cont("\n"); + } + + if (bufp > ((void *)&ee_data[DE_EEPROM_SIZE - 3])) + break; + } + + de->media_advertise = de->media_supported; + +fill_defaults: + /* fill in defaults, for cases where custom CSRs not used */ + for (i = 0; i < DE_MAX_MEDIA; i++) { + if (de->media[i].csr13 == 0xffff) + de->media[i].csr13 = t21041_csr13[i]; + if (de->media[i].csr14 == 0xffff) { + /* autonegotiation is broken at least on some chip + revisions - rev. 0x21 works, 0x11 does not */ + if (de->pdev->revision < 0x20) + de->media[i].csr14 = t21041_csr14_brk[i]; + else + de->media[i].csr14 = t21041_csr14[i]; + } + if (de->media[i].csr15 == 0xffff) + de->media[i].csr15 = t21041_csr15[i]; + } + + de->ee_data = kmemdup(&ee_data[0], DE_EEPROM_SIZE, GFP_KERNEL); + + return; + +bad_srom: + /* for error cases, it's ok to assume we support all these */ + for (i = 0; i < DE_MAX_MEDIA; i++) + de->media[i].type = i; + de->media_supported = + SUPPORTED_10baseT_Half | + SUPPORTED_10baseT_Full | + SUPPORTED_Autoneg | + SUPPORTED_TP | + SUPPORTED_AUI | + SUPPORTED_BNC; + goto fill_defaults; +} + +static const struct net_device_ops de_netdev_ops = { + .ndo_open = de_open, + .ndo_stop = de_close, + .ndo_set_rx_mode = de_set_rx_mode, + .ndo_start_xmit = de_start_xmit, + .ndo_get_stats = de_get_stats, + .ndo_tx_timeout = de_tx_timeout, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static int de_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct net_device *dev; + struct de_private *de; + int rc; + void __iomem *regs; + unsigned long pciaddr; + static int board_idx = -1; + + board_idx++; + + /* allocate a new ethernet device structure, and fill in defaults */ + dev = alloc_etherdev(sizeof(struct de_private)); + if (!dev) + return -ENOMEM; + + dev->netdev_ops = &de_netdev_ops; + SET_NETDEV_DEV(dev, &pdev->dev); + dev->ethtool_ops = &de_ethtool_ops; + dev->watchdog_timeo = TX_TIMEOUT; + + de = netdev_priv(dev); + de->de21040 = ent->driver_data == 0 ? 1 : 0; + de->pdev = pdev; + de->dev = dev; + de->msg_enable = (debug < 0 ? DE_DEF_MSG_ENABLE : debug); + de->board_idx = board_idx; + spin_lock_init (&de->lock); + timer_setup(&de->media_timer, + de->de21040 ? de21040_media_timer : de21041_media_timer, + 0); + + netif_carrier_off(dev); + + /* wake up device, assign resources */ + rc = pci_enable_device(pdev); + if (rc) + goto err_out_free; + + /* reserve PCI resources to ensure driver atomicity */ + rc = pci_request_regions(pdev, DRV_NAME); + if (rc) + goto err_out_disable; + + /* check for invalid IRQ value */ + if (pdev->irq < 2) { + rc = -EIO; + pr_err("invalid irq (%d) for pci dev %s\n", + pdev->irq, pci_name(pdev)); + goto err_out_res; + } + + /* obtain and check validity of PCI I/O address */ + pciaddr = pci_resource_start(pdev, 1); + if (!pciaddr) { + rc = -EIO; + pr_err("no MMIO resource for pci dev %s\n", pci_name(pdev)); + goto err_out_res; + } + if (pci_resource_len(pdev, 1) < DE_REGS_SIZE) { + rc = -EIO; + pr_err("MMIO resource (%llx) too small on pci dev %s\n", + (unsigned long long)pci_resource_len(pdev, 1), + pci_name(pdev)); + goto err_out_res; + } + + /* remap CSR registers */ + regs = ioremap(pciaddr, DE_REGS_SIZE); + if (!regs) { + rc = -EIO; + pr_err("Cannot map PCI MMIO (%llx@%lx) on pci dev %s\n", + (unsigned long long)pci_resource_len(pdev, 1), + pciaddr, pci_name(pdev)); + goto err_out_res; + } + de->regs = regs; + + de_adapter_wake(de); + + /* make sure hardware is not running */ + rc = de_reset_mac(de); + if (rc) { + pr_err("Cannot reset MAC, pci dev %s\n", pci_name(pdev)); + goto err_out_iomap; + } + + /* get MAC address, initialize default media type and + * get list of supported media + */ + if (de->de21040) { + de21040_get_mac_address(de); + de21040_get_media_info(de); + } else { + de21041_get_srom_info(de); + } + + /* register new network interface with kernel */ + rc = register_netdev(dev); + if (rc) + goto err_out_iomap; + + /* print info about board and interface just registered */ + netdev_info(dev, "%s at %p, %pM, IRQ %d\n", + de->de21040 ? "21040" : "21041", + regs, dev->dev_addr, pdev->irq); + + pci_set_drvdata(pdev, dev); + + /* enable busmastering */ + pci_set_master(pdev); + + /* put adapter to sleep */ + de_adapter_sleep(de); + + return 0; + +err_out_iomap: + kfree(de->ee_data); + iounmap(regs); +err_out_res: + pci_release_regions(pdev); +err_out_disable: + pci_disable_device(pdev); +err_out_free: + free_netdev(dev); + return rc; +} + +static void de_remove_one(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct de_private *de = netdev_priv(dev); + + BUG_ON(!dev); + unregister_netdev(dev); + kfree(de->ee_data); + iounmap(de->regs); + pci_release_regions(pdev); + pci_disable_device(pdev); + free_netdev(dev); +} + +static int __maybe_unused de_suspend(struct device *dev_d) +{ + struct pci_dev *pdev = to_pci_dev(dev_d); + struct net_device *dev = pci_get_drvdata(pdev); + struct de_private *de = netdev_priv(dev); + + rtnl_lock(); + if (netif_running (dev)) { + const int irq = pdev->irq; + + del_timer_sync(&de->media_timer); + + disable_irq(irq); + spin_lock_irq(&de->lock); + + de_stop_hw(de); + netif_stop_queue(dev); + netif_device_detach(dev); + netif_carrier_off(dev); + + spin_unlock_irq(&de->lock); + enable_irq(irq); + + /* Update the error counts. */ + __de_get_stats(de); + + synchronize_irq(irq); + de_clean_rings(de); + + de_adapter_sleep(de); + } else { + netif_device_detach(dev); + } + rtnl_unlock(); + return 0; +} + +static int __maybe_unused de_resume(struct device *dev_d) +{ + struct pci_dev *pdev = to_pci_dev(dev_d); + struct net_device *dev = pci_get_drvdata(pdev); + struct de_private *de = netdev_priv(dev); + + rtnl_lock(); + if (netif_device_present(dev)) + goto out; + if (!netif_running(dev)) + goto out_attach; + pci_set_master(pdev); + de_init_rings(de); + de_init_hw(de); +out_attach: + netif_device_attach(dev); +out: + rtnl_unlock(); + return 0; +} + +static SIMPLE_DEV_PM_OPS(de_pm_ops, de_suspend, de_resume); + +static void de_shutdown(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + + rtnl_lock(); + dev_close(dev); + rtnl_unlock(); +} + +static struct pci_driver de_driver = { + .name = DRV_NAME, + .id_table = de_pci_tbl, + .probe = de_init_one, + .remove = de_remove_one, + .shutdown = de_shutdown, + .driver.pm = &de_pm_ops, +}; + +module_pci_driver(de_driver); |