diff options
Diffstat (limited to 'drivers/net/ethernet/natsemi/ns83820.c')
| -rw-r--r-- | drivers/net/ethernet/natsemi/ns83820.c | 2266 |
1 files changed, 2266 insertions, 0 deletions
diff --git a/drivers/net/ethernet/natsemi/ns83820.c b/drivers/net/ethernet/natsemi/ns83820.c new file mode 100644 index 000000000..998586872 --- /dev/null +++ b/drivers/net/ethernet/natsemi/ns83820.c @@ -0,0 +1,2266 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#define VERSION "0.23" +/* ns83820.c by Benjamin LaHaise with contributions. + * + * Questions/comments/discussion to linux-ns83820@kvack.org. + * + * $Revision: 1.34.2.23 $ + * + * Copyright 2001 Benjamin LaHaise. + * Copyright 2001, 2002 Red Hat. + * + * Mmmm, chocolate vanilla mocha... + * + * ChangeLog + * ========= + * 20010414 0.1 - created + * 20010622 0.2 - basic rx and tx. + * 20010711 0.3 - added duplex and link state detection support. + * 20010713 0.4 - zero copy, no hangs. + * 0.5 - 64 bit dma support (davem will hate me for this) + * - disable jumbo frames to avoid tx hangs + * - work around tx deadlocks on my 1.02 card via + * fiddling with TXCFG + * 20010810 0.6 - use pci dma api for ringbuffers, work on ia64 + * 20010816 0.7 - misc cleanups + * 20010826 0.8 - fix critical zero copy bugs + * 0.9 - internal experiment + * 20010827 0.10 - fix ia64 unaligned access. + * 20010906 0.11 - accept all packets with checksum errors as + * otherwise fragments get lost + * - fix >> 32 bugs + * 0.12 - add statistics counters + * - add allmulti/promisc support + * 20011009 0.13 - hotplug support, other smaller pci api cleanups + * 20011204 0.13a - optical transceiver support added + * by Michael Clark <michael@metaparadigm.com> + * 20011205 0.13b - call register_netdev earlier in initialization + * suppress duplicate link status messages + * 20011117 0.14 - ethtool GDRVINFO, GLINK support from jgarzik + * 20011204 0.15 get ppc (big endian) working + * 20011218 0.16 various cleanups + * 20020310 0.17 speedups + * 20020610 0.18 - actually use the pci dma api for highmem + * - remove pci latency register fiddling + * 0.19 - better bist support + * - add ihr and reset_phy parameters + * - gmii bus probing + * - fix missed txok introduced during performance + * tuning + * 0.20 - fix stupid RFEN thinko. i am such a smurf. + * 20040828 0.21 - add hardware vlan accleration + * by Neil Horman <nhorman@redhat.com> + * 20050406 0.22 - improved DAC ifdefs from Andi Kleen + * - removal of dead code from Adrian Bunk + * - fix half duplex collision behaviour + * Driver Overview + * =============== + * + * This driver was originally written for the National Semiconductor + * 83820 chip, a 10/100/1000 Mbps 64 bit PCI ethernet NIC. Hopefully + * this code will turn out to be a) clean, b) correct, and c) fast. + * With that in mind, I'm aiming to split the code up as much as + * reasonably possible. At present there are X major sections that + * break down into a) packet receive, b) packet transmit, c) link + * management, d) initialization and configuration. Where possible, + * these code paths are designed to run in parallel. + * + * This driver has been tested and found to work with the following + * cards (in no particular order): + * + * Cameo SOHO-GA2000T SOHO-GA2500T + * D-Link DGE-500T + * PureData PDP8023Z-TG + * SMC SMC9452TX SMC9462TX + * Netgear GA621 + * + * Special thanks to SMC for providing hardware to test this driver on. + * + * Reports of success or failure would be greatly appreciated. + */ +//#define dprintk printk +#define dprintk(x...) do { } while (0) + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/dma-mapping.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/delay.h> +#include <linux/workqueue.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/ip.h> /* for iph */ +#include <linux/in.h> /* for IPPROTO_... */ +#include <linux/compiler.h> +#include <linux/prefetch.h> +#include <linux/ethtool.h> +#include <linux/sched.h> +#include <linux/timer.h> +#include <linux/if_vlan.h> +#include <linux/rtnetlink.h> +#include <linux/jiffies.h> +#include <linux/slab.h> + +#include <asm/io.h> +#include <linux/uaccess.h> + +#define DRV_NAME "ns83820" + +/* Global parameters. See module_param near the bottom. */ +static int ihr = 2; +static int reset_phy = 0; +static int lnksts = 0; /* CFG_LNKSTS bit polarity */ + +/* Dprintk is used for more interesting debug events */ +#undef Dprintk +#define Dprintk dprintk + +/* tunables */ +#define RX_BUF_SIZE 1500 /* 8192 */ +#if IS_ENABLED(CONFIG_VLAN_8021Q) +#define NS83820_VLAN_ACCEL_SUPPORT +#endif + +/* Must not exceed ~65000. */ +#define NR_RX_DESC 64 +#define NR_TX_DESC 128 + +/* not tunable */ +#define REAL_RX_BUF_SIZE (RX_BUF_SIZE + 14) /* rx/tx mac addr + type */ + +#define MIN_TX_DESC_FREE 8 + +/* register defines */ +#define CFGCS 0x04 + +#define CR_TXE 0x00000001 +#define CR_TXD 0x00000002 +/* Ramit : Here's a tip, don't do a RXD immediately followed by an RXE + * The Receive engine skips one descriptor and moves + * onto the next one!! */ +#define CR_RXE 0x00000004 +#define CR_RXD 0x00000008 +#define CR_TXR 0x00000010 +#define CR_RXR 0x00000020 +#define CR_SWI 0x00000080 +#define CR_RST 0x00000100 + +#define PTSCR_EEBIST_FAIL 0x00000001 +#define PTSCR_EEBIST_EN 0x00000002 +#define PTSCR_EELOAD_EN 0x00000004 +#define PTSCR_RBIST_FAIL 0x000001b8 +#define PTSCR_RBIST_DONE 0x00000200 +#define PTSCR_RBIST_EN 0x00000400 +#define PTSCR_RBIST_RST 0x00002000 + +#define MEAR_EEDI 0x00000001 +#define MEAR_EEDO 0x00000002 +#define MEAR_EECLK 0x00000004 +#define MEAR_EESEL 0x00000008 +#define MEAR_MDIO 0x00000010 +#define MEAR_MDDIR 0x00000020 +#define MEAR_MDC 0x00000040 + +#define ISR_TXDESC3 0x40000000 +#define ISR_TXDESC2 0x20000000 +#define ISR_TXDESC1 0x10000000 +#define ISR_TXDESC0 0x08000000 +#define ISR_RXDESC3 0x04000000 +#define ISR_RXDESC2 0x02000000 +#define ISR_RXDESC1 0x01000000 +#define ISR_RXDESC0 0x00800000 +#define ISR_TXRCMP 0x00400000 +#define ISR_RXRCMP 0x00200000 +#define ISR_DPERR 0x00100000 +#define ISR_SSERR 0x00080000 +#define ISR_RMABT 0x00040000 +#define ISR_RTABT 0x00020000 +#define ISR_RXSOVR 0x00010000 +#define ISR_HIBINT 0x00008000 +#define ISR_PHY 0x00004000 +#define ISR_PME 0x00002000 +#define ISR_SWI 0x00001000 +#define ISR_MIB 0x00000800 +#define ISR_TXURN 0x00000400 +#define ISR_TXIDLE 0x00000200 +#define ISR_TXERR 0x00000100 +#define ISR_TXDESC 0x00000080 +#define ISR_TXOK 0x00000040 +#define ISR_RXORN 0x00000020 +#define ISR_RXIDLE 0x00000010 +#define ISR_RXEARLY 0x00000008 +#define ISR_RXERR 0x00000004 +#define ISR_RXDESC 0x00000002 +#define ISR_RXOK 0x00000001 + +#define TXCFG_CSI 0x80000000 +#define TXCFG_HBI 0x40000000 +#define TXCFG_MLB 0x20000000 +#define TXCFG_ATP 0x10000000 +#define TXCFG_ECRETRY 0x00800000 +#define TXCFG_BRST_DIS 0x00080000 +#define TXCFG_MXDMA1024 0x00000000 +#define TXCFG_MXDMA512 0x00700000 +#define TXCFG_MXDMA256 0x00600000 +#define TXCFG_MXDMA128 0x00500000 +#define TXCFG_MXDMA64 0x00400000 +#define TXCFG_MXDMA32 0x00300000 +#define TXCFG_MXDMA16 0x00200000 +#define TXCFG_MXDMA8 0x00100000 + +#define CFG_LNKSTS 0x80000000 +#define CFG_SPDSTS 0x60000000 +#define CFG_SPDSTS1 0x40000000 +#define CFG_SPDSTS0 0x20000000 +#define CFG_DUPSTS 0x10000000 +#define CFG_TBI_EN 0x01000000 +#define CFG_MODE_1000 0x00400000 +/* Ramit : Dont' ever use AUTO_1000, it never works and is buggy. + * Read the Phy response and then configure the MAC accordingly */ +#define CFG_AUTO_1000 0x00200000 +#define CFG_PINT_CTL 0x001c0000 +#define CFG_PINT_DUPSTS 0x00100000 +#define CFG_PINT_LNKSTS 0x00080000 +#define CFG_PINT_SPDSTS 0x00040000 +#define CFG_TMRTEST 0x00020000 +#define CFG_MRM_DIS 0x00010000 +#define CFG_MWI_DIS 0x00008000 +#define CFG_T64ADDR 0x00004000 +#define CFG_PCI64_DET 0x00002000 +#define CFG_DATA64_EN 0x00001000 +#define CFG_M64ADDR 0x00000800 +#define CFG_PHY_RST 0x00000400 +#define CFG_PHY_DIS 0x00000200 +#define CFG_EXTSTS_EN 0x00000100 +#define CFG_REQALG 0x00000080 +#define CFG_SB 0x00000040 +#define CFG_POW 0x00000020 +#define CFG_EXD 0x00000010 +#define CFG_PESEL 0x00000008 +#define CFG_BROM_DIS 0x00000004 +#define CFG_EXT_125 0x00000002 +#define CFG_BEM 0x00000001 + +#define EXTSTS_UDPPKT 0x00200000 +#define EXTSTS_TCPPKT 0x00080000 +#define EXTSTS_IPPKT 0x00020000 +#define EXTSTS_VPKT 0x00010000 +#define EXTSTS_VTG_MASK 0x0000ffff + +#define SPDSTS_POLARITY (CFG_SPDSTS1 | CFG_SPDSTS0 | CFG_DUPSTS | (lnksts ? CFG_LNKSTS : 0)) + +#define MIBC_MIBS 0x00000008 +#define MIBC_ACLR 0x00000004 +#define MIBC_FRZ 0x00000002 +#define MIBC_WRN 0x00000001 + +#define PCR_PSEN (1 << 31) +#define PCR_PS_MCAST (1 << 30) +#define PCR_PS_DA (1 << 29) +#define PCR_STHI_8 (3 << 23) +#define PCR_STLO_4 (1 << 23) +#define PCR_FFHI_8K (3 << 21) +#define PCR_FFLO_4K (1 << 21) +#define PCR_PAUSE_CNT 0xFFFE + +#define RXCFG_AEP 0x80000000 +#define RXCFG_ARP 0x40000000 +#define RXCFG_STRIPCRC 0x20000000 +#define RXCFG_RX_FD 0x10000000 +#define RXCFG_ALP 0x08000000 +#define RXCFG_AIRL 0x04000000 +#define RXCFG_MXDMA512 0x00700000 +#define RXCFG_DRTH 0x0000003e +#define RXCFG_DRTH0 0x00000002 + +#define RFCR_RFEN 0x80000000 +#define RFCR_AAB 0x40000000 +#define RFCR_AAM 0x20000000 +#define RFCR_AAU 0x10000000 +#define RFCR_APM 0x08000000 +#define RFCR_APAT 0x07800000 +#define RFCR_APAT3 0x04000000 +#define RFCR_APAT2 0x02000000 +#define RFCR_APAT1 0x01000000 +#define RFCR_APAT0 0x00800000 +#define RFCR_AARP 0x00400000 +#define RFCR_MHEN 0x00200000 +#define RFCR_UHEN 0x00100000 +#define RFCR_ULM 0x00080000 + +#define VRCR_RUDPE 0x00000080 +#define VRCR_RTCPE 0x00000040 +#define VRCR_RIPE 0x00000020 +#define VRCR_IPEN 0x00000010 +#define VRCR_DUTF 0x00000008 +#define VRCR_DVTF 0x00000004 +#define VRCR_VTREN 0x00000002 +#define VRCR_VTDEN 0x00000001 + +#define VTCR_PPCHK 0x00000008 +#define VTCR_GCHK 0x00000004 +#define VTCR_VPPTI 0x00000002 +#define VTCR_VGTI 0x00000001 + +#define CR 0x00 +#define CFG 0x04 +#define MEAR 0x08 +#define PTSCR 0x0c +#define ISR 0x10 +#define IMR 0x14 +#define IER 0x18 +#define IHR 0x1c +#define TXDP 0x20 +#define TXDP_HI 0x24 +#define TXCFG 0x28 +#define GPIOR 0x2c +#define RXDP 0x30 +#define RXDP_HI 0x34 +#define RXCFG 0x38 +#define PQCR 0x3c +#define WCSR 0x40 +#define PCR 0x44 +#define RFCR 0x48 +#define RFDR 0x4c + +#define SRR 0x58 + +#define VRCR 0xbc +#define VTCR 0xc0 +#define VDR 0xc4 +#define CCSR 0xcc + +#define TBICR 0xe0 +#define TBISR 0xe4 +#define TANAR 0xe8 +#define TANLPAR 0xec +#define TANER 0xf0 +#define TESR 0xf4 + +#define TBICR_MR_AN_ENABLE 0x00001000 +#define TBICR_MR_RESTART_AN 0x00000200 + +#define TBISR_MR_LINK_STATUS 0x00000020 +#define TBISR_MR_AN_COMPLETE 0x00000004 + +#define TANAR_PS2 0x00000100 +#define TANAR_PS1 0x00000080 +#define TANAR_HALF_DUP 0x00000040 +#define TANAR_FULL_DUP 0x00000020 + +#define GPIOR_GP5_OE 0x00000200 +#define GPIOR_GP4_OE 0x00000100 +#define GPIOR_GP3_OE 0x00000080 +#define GPIOR_GP2_OE 0x00000040 +#define GPIOR_GP1_OE 0x00000020 +#define GPIOR_GP3_OUT 0x00000004 +#define GPIOR_GP1_OUT 0x00000001 + +#define LINK_AUTONEGOTIATE 0x01 +#define LINK_DOWN 0x02 +#define LINK_UP 0x04 + +#define HW_ADDR_LEN sizeof(dma_addr_t) +#define desc_addr_set(desc, addr) \ + do { \ + ((desc)[0] = cpu_to_le32(addr)); \ + if (HW_ADDR_LEN == 8) \ + (desc)[1] = cpu_to_le32(((u64)addr) >> 32); \ + } while(0) +#define desc_addr_get(desc) \ + (le32_to_cpu((desc)[0]) | \ + (HW_ADDR_LEN == 8 ? ((dma_addr_t)le32_to_cpu((desc)[1]))<<32 : 0)) + +#define DESC_LINK 0 +#define DESC_BUFPTR (DESC_LINK + HW_ADDR_LEN/4) +#define DESC_CMDSTS (DESC_BUFPTR + HW_ADDR_LEN/4) +#define DESC_EXTSTS (DESC_CMDSTS + 4/4) + +#define CMDSTS_OWN 0x80000000 +#define CMDSTS_MORE 0x40000000 +#define CMDSTS_INTR 0x20000000 +#define CMDSTS_ERR 0x10000000 +#define CMDSTS_OK 0x08000000 +#define CMDSTS_RUNT 0x00200000 +#define CMDSTS_LEN_MASK 0x0000ffff + +#define CMDSTS_DEST_MASK 0x01800000 +#define CMDSTS_DEST_SELF 0x00800000 +#define CMDSTS_DEST_MULTI 0x01000000 + +#define DESC_SIZE 8 /* Should be cache line sized */ + +struct rx_info { + spinlock_t lock; + int up; + unsigned long idle; + + struct sk_buff *skbs[NR_RX_DESC]; + + __le32 *next_rx_desc; + u16 next_rx, next_empty; + + __le32 *descs; + dma_addr_t phy_descs; +}; + + +struct ns83820 { + u8 __iomem *base; + + struct pci_dev *pci_dev; + struct net_device *ndev; + + struct rx_info rx_info; + struct tasklet_struct rx_tasklet; + + unsigned ihr; + struct work_struct tq_refill; + + /* protects everything below. irqsave when using. */ + spinlock_t misc_lock; + + u32 CFG_cache; + + u32 MEAR_cache; + u32 IMR_cache; + + unsigned linkstate; + + spinlock_t tx_lock; + + u16 tx_done_idx; + u16 tx_idx; + volatile u16 tx_free_idx; /* idx of free desc chain */ + u16 tx_intr_idx; + + atomic_t nr_tx_skbs; + struct sk_buff *tx_skbs[NR_TX_DESC]; + + char pad[16] __attribute__((aligned(16))); + __le32 *tx_descs; + dma_addr_t tx_phy_descs; + + struct timer_list tx_watchdog; +}; + +static inline struct ns83820 *PRIV(struct net_device *dev) +{ + return netdev_priv(dev); +} + +#define __kick_rx(dev) writel(CR_RXE, dev->base + CR) + +static inline void kick_rx(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + dprintk("kick_rx: maybe kicking\n"); + if (test_and_clear_bit(0, &dev->rx_info.idle)) { + dprintk("actually kicking\n"); + writel(dev->rx_info.phy_descs + + (4 * DESC_SIZE * dev->rx_info.next_rx), + dev->base + RXDP); + if (dev->rx_info.next_rx == dev->rx_info.next_empty) + printk(KERN_DEBUG "%s: uh-oh: next_rx == next_empty???\n", + ndev->name); + __kick_rx(dev); + } +} + +//free = (tx_done_idx + NR_TX_DESC-2 - free_idx) % NR_TX_DESC +#define start_tx_okay(dev) \ + (((NR_TX_DESC-2 + dev->tx_done_idx - dev->tx_free_idx) % NR_TX_DESC) > MIN_TX_DESC_FREE) + +/* Packet Receiver + * + * The hardware supports linked lists of receive descriptors for + * which ownership is transferred back and forth by means of an + * ownership bit. While the hardware does support the use of a + * ring for receive descriptors, we only make use of a chain in + * an attempt to reduce bus traffic under heavy load scenarios. + * This will also make bugs a bit more obvious. The current code + * only makes use of a single rx chain; I hope to implement + * priority based rx for version 1.0. Goal: even under overload + * conditions, still route realtime traffic with as low jitter as + * possible. + */ +static inline void build_rx_desc(struct ns83820 *dev, __le32 *desc, dma_addr_t link, dma_addr_t buf, u32 cmdsts, u32 extsts) +{ + desc_addr_set(desc + DESC_LINK, link); + desc_addr_set(desc + DESC_BUFPTR, buf); + desc[DESC_EXTSTS] = cpu_to_le32(extsts); + mb(); + desc[DESC_CMDSTS] = cpu_to_le32(cmdsts); +} + +#define nr_rx_empty(dev) ((NR_RX_DESC-2 + dev->rx_info.next_rx - dev->rx_info.next_empty) % NR_RX_DESC) +static inline int ns83820_add_rx_skb(struct ns83820 *dev, struct sk_buff *skb) +{ + unsigned next_empty; + u32 cmdsts; + __le32 *sg; + dma_addr_t buf; + + next_empty = dev->rx_info.next_empty; + + /* don't overrun last rx marker */ + if (unlikely(nr_rx_empty(dev) <= 2)) { + kfree_skb(skb); + return 1; + } + +#if 0 + dprintk("next_empty[%d] nr_used[%d] next_rx[%d]\n", + dev->rx_info.next_empty, + dev->rx_info.nr_used, + dev->rx_info.next_rx + ); +#endif + + sg = dev->rx_info.descs + (next_empty * DESC_SIZE); + BUG_ON(NULL != dev->rx_info.skbs[next_empty]); + dev->rx_info.skbs[next_empty] = skb; + + dev->rx_info.next_empty = (next_empty + 1) % NR_RX_DESC; + cmdsts = REAL_RX_BUF_SIZE | CMDSTS_INTR; + buf = dma_map_single(&dev->pci_dev->dev, skb->data, REAL_RX_BUF_SIZE, + DMA_FROM_DEVICE); + build_rx_desc(dev, sg, 0, buf, cmdsts, 0); + /* update link of previous rx */ + if (likely(next_empty != dev->rx_info.next_rx)) + dev->rx_info.descs[((NR_RX_DESC + next_empty - 1) % NR_RX_DESC) * DESC_SIZE] = cpu_to_le32(dev->rx_info.phy_descs + (next_empty * DESC_SIZE * 4)); + + return 0; +} + +static inline int rx_refill(struct net_device *ndev, gfp_t gfp) +{ + struct ns83820 *dev = PRIV(ndev); + unsigned i; + unsigned long flags = 0; + + if (unlikely(nr_rx_empty(dev) <= 2)) + return 0; + + dprintk("rx_refill(%p)\n", ndev); + if (gfp == GFP_ATOMIC) + spin_lock_irqsave(&dev->rx_info.lock, flags); + for (i=0; i<NR_RX_DESC; i++) { + struct sk_buff *skb; + long res; + + /* extra 16 bytes for alignment */ + skb = __netdev_alloc_skb(ndev, REAL_RX_BUF_SIZE+16, gfp); + if (unlikely(!skb)) + break; + + skb_reserve(skb, skb->data - PTR_ALIGN(skb->data, 16)); + if (gfp != GFP_ATOMIC) + spin_lock_irqsave(&dev->rx_info.lock, flags); + res = ns83820_add_rx_skb(dev, skb); + if (gfp != GFP_ATOMIC) + spin_unlock_irqrestore(&dev->rx_info.lock, flags); + if (res) { + i = 1; + break; + } + } + if (gfp == GFP_ATOMIC) + spin_unlock_irqrestore(&dev->rx_info.lock, flags); + + return i ? 0 : -ENOMEM; +} + +static void rx_refill_atomic(struct net_device *ndev) +{ + rx_refill(ndev, GFP_ATOMIC); +} + +/* REFILL */ +static inline void queue_refill(struct work_struct *work) +{ + struct ns83820 *dev = container_of(work, struct ns83820, tq_refill); + struct net_device *ndev = dev->ndev; + + rx_refill(ndev, GFP_KERNEL); + if (dev->rx_info.up) + kick_rx(ndev); +} + +static inline void clear_rx_desc(struct ns83820 *dev, unsigned i) +{ + build_rx_desc(dev, dev->rx_info.descs + (DESC_SIZE * i), 0, 0, CMDSTS_OWN, 0); +} + +static void phy_intr(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + static const char *speeds[] = { "10", "100", "1000", "1000(?)", "1000F" }; + u32 cfg, new_cfg; + u32 tanar, tanlpar; + int speed, fullduplex, newlinkstate; + + cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY; + + if (dev->CFG_cache & CFG_TBI_EN) { + u32 __maybe_unused tbisr; + + /* we have an optical transceiver */ + tbisr = readl(dev->base + TBISR); + tanar = readl(dev->base + TANAR); + tanlpar = readl(dev->base + TANLPAR); + dprintk("phy_intr: tbisr=%08x, tanar=%08x, tanlpar=%08x\n", + tbisr, tanar, tanlpar); + + if ( (fullduplex = (tanlpar & TANAR_FULL_DUP) && + (tanar & TANAR_FULL_DUP)) ) { + + /* both of us are full duplex */ + writel(readl(dev->base + TXCFG) + | TXCFG_CSI | TXCFG_HBI | TXCFG_ATP, + dev->base + TXCFG); + writel(readl(dev->base + RXCFG) | RXCFG_RX_FD, + dev->base + RXCFG); + /* Light up full duplex LED */ + writel(readl(dev->base + GPIOR) | GPIOR_GP1_OUT, + dev->base + GPIOR); + + } else if (((tanlpar & TANAR_HALF_DUP) && + (tanar & TANAR_HALF_DUP)) || + ((tanlpar & TANAR_FULL_DUP) && + (tanar & TANAR_HALF_DUP)) || + ((tanlpar & TANAR_HALF_DUP) && + (tanar & TANAR_FULL_DUP))) { + + /* one or both of us are half duplex */ + writel((readl(dev->base + TXCFG) + & ~(TXCFG_CSI | TXCFG_HBI)) | TXCFG_ATP, + dev->base + TXCFG); + writel(readl(dev->base + RXCFG) & ~RXCFG_RX_FD, + dev->base + RXCFG); + /* Turn off full duplex LED */ + writel(readl(dev->base + GPIOR) & ~GPIOR_GP1_OUT, + dev->base + GPIOR); + } + + speed = 4; /* 1000F */ + + } else { + /* we have a copper transceiver */ + new_cfg = dev->CFG_cache & ~(CFG_SB | CFG_MODE_1000 | CFG_SPDSTS); + + if (cfg & CFG_SPDSTS1) + new_cfg |= CFG_MODE_1000; + else + new_cfg &= ~CFG_MODE_1000; + + speed = ((cfg / CFG_SPDSTS0) & 3); + fullduplex = (cfg & CFG_DUPSTS); + + if (fullduplex) { + new_cfg |= CFG_SB; + writel(readl(dev->base + TXCFG) + | TXCFG_CSI | TXCFG_HBI, + dev->base + TXCFG); + writel(readl(dev->base + RXCFG) | RXCFG_RX_FD, + dev->base + RXCFG); + } else { + writel(readl(dev->base + TXCFG) + & ~(TXCFG_CSI | TXCFG_HBI), + dev->base + TXCFG); + writel(readl(dev->base + RXCFG) & ~(RXCFG_RX_FD), + dev->base + RXCFG); + } + + if ((cfg & CFG_LNKSTS) && + ((new_cfg ^ dev->CFG_cache) != 0)) { + writel(new_cfg, dev->base + CFG); + dev->CFG_cache = new_cfg; + } + + dev->CFG_cache &= ~CFG_SPDSTS; + dev->CFG_cache |= cfg & CFG_SPDSTS; + } + + newlinkstate = (cfg & CFG_LNKSTS) ? LINK_UP : LINK_DOWN; + + if (newlinkstate & LINK_UP && + dev->linkstate != newlinkstate) { + netif_start_queue(ndev); + netif_wake_queue(ndev); + printk(KERN_INFO "%s: link now %s mbps, %s duplex and up.\n", + ndev->name, + speeds[speed], + fullduplex ? "full" : "half"); + } else if (newlinkstate & LINK_DOWN && + dev->linkstate != newlinkstate) { + netif_stop_queue(ndev); + printk(KERN_INFO "%s: link now down.\n", ndev->name); + } + + dev->linkstate = newlinkstate; +} + +static int ns83820_setup_rx(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + unsigned i; + int ret; + + dprintk("ns83820_setup_rx(%p)\n", ndev); + + dev->rx_info.idle = 1; + dev->rx_info.next_rx = 0; + dev->rx_info.next_rx_desc = dev->rx_info.descs; + dev->rx_info.next_empty = 0; + + for (i=0; i<NR_RX_DESC; i++) + clear_rx_desc(dev, i); + + writel(0, dev->base + RXDP_HI); + writel(dev->rx_info.phy_descs, dev->base + RXDP); + + ret = rx_refill(ndev, GFP_KERNEL); + if (!ret) { + dprintk("starting receiver\n"); + /* prevent the interrupt handler from stomping on us */ + spin_lock_irq(&dev->rx_info.lock); + + writel(0x0001, dev->base + CCSR); + writel(0, dev->base + RFCR); + writel(0x7fc00000, dev->base + RFCR); + writel(0xffc00000, dev->base + RFCR); + + dev->rx_info.up = 1; + + phy_intr(ndev); + + /* Okay, let it rip */ + spin_lock(&dev->misc_lock); + dev->IMR_cache |= ISR_PHY; + dev->IMR_cache |= ISR_RXRCMP; + //dev->IMR_cache |= ISR_RXERR; + //dev->IMR_cache |= ISR_RXOK; + dev->IMR_cache |= ISR_RXORN; + dev->IMR_cache |= ISR_RXSOVR; + dev->IMR_cache |= ISR_RXDESC; + dev->IMR_cache |= ISR_RXIDLE; + dev->IMR_cache |= ISR_TXDESC; + dev->IMR_cache |= ISR_TXIDLE; + + writel(dev->IMR_cache, dev->base + IMR); + writel(1, dev->base + IER); + spin_unlock(&dev->misc_lock); + + kick_rx(ndev); + + spin_unlock_irq(&dev->rx_info.lock); + } + return ret; +} + +static void ns83820_cleanup_rx(struct ns83820 *dev) +{ + unsigned i; + unsigned long flags; + + dprintk("ns83820_cleanup_rx(%p)\n", dev); + + /* disable receive interrupts */ + spin_lock_irqsave(&dev->misc_lock, flags); + dev->IMR_cache &= ~(ISR_RXOK | ISR_RXDESC | ISR_RXERR | ISR_RXEARLY | ISR_RXIDLE); + writel(dev->IMR_cache, dev->base + IMR); + spin_unlock_irqrestore(&dev->misc_lock, flags); + + /* synchronize with the interrupt handler and kill it */ + dev->rx_info.up = 0; + synchronize_irq(dev->pci_dev->irq); + + /* touch the pci bus... */ + readl(dev->base + IMR); + + /* assumes the transmitter is already disabled and reset */ + writel(0, dev->base + RXDP_HI); + writel(0, dev->base + RXDP); + + for (i=0; i<NR_RX_DESC; i++) { + struct sk_buff *skb = dev->rx_info.skbs[i]; + dev->rx_info.skbs[i] = NULL; + clear_rx_desc(dev, i); + kfree_skb(skb); + } +} + +static void ns83820_rx_kick(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + /*if (nr_rx_empty(dev) >= NR_RX_DESC/4)*/ { + if (dev->rx_info.up) { + rx_refill_atomic(ndev); + kick_rx(ndev); + } + } + + if (dev->rx_info.up && nr_rx_empty(dev) > NR_RX_DESC*3/4) + schedule_work(&dev->tq_refill); + else + kick_rx(ndev); + if (dev->rx_info.idle) + printk(KERN_DEBUG "%s: BAD\n", ndev->name); +} + +/* rx_irq + * + */ +static void rx_irq(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + struct rx_info *info = &dev->rx_info; + unsigned next_rx; + int rx_rc, len; + u32 cmdsts; + __le32 *desc; + unsigned long flags; + int nr = 0; + + dprintk("rx_irq(%p)\n", ndev); + dprintk("rxdp: %08x, descs: %08lx next_rx[%d]: %p next_empty[%d]: %p\n", + readl(dev->base + RXDP), + (long)(dev->rx_info.phy_descs), + (int)dev->rx_info.next_rx, + (dev->rx_info.descs + (DESC_SIZE * dev->rx_info.next_rx)), + (int)dev->rx_info.next_empty, + (dev->rx_info.descs + (DESC_SIZE * dev->rx_info.next_empty)) + ); + + spin_lock_irqsave(&info->lock, flags); + if (!info->up) + goto out; + + dprintk("walking descs\n"); + next_rx = info->next_rx; + desc = info->next_rx_desc; + while ((CMDSTS_OWN & (cmdsts = le32_to_cpu(desc[DESC_CMDSTS]))) && + (cmdsts != CMDSTS_OWN)) { + struct sk_buff *skb; + u32 extsts = le32_to_cpu(desc[DESC_EXTSTS]); + dma_addr_t bufptr = desc_addr_get(desc + DESC_BUFPTR); + + dprintk("cmdsts: %08x\n", cmdsts); + dprintk("link: %08x\n", cpu_to_le32(desc[DESC_LINK])); + dprintk("extsts: %08x\n", extsts); + + skb = info->skbs[next_rx]; + info->skbs[next_rx] = NULL; + info->next_rx = (next_rx + 1) % NR_RX_DESC; + + mb(); + clear_rx_desc(dev, next_rx); + + dma_unmap_single(&dev->pci_dev->dev, bufptr, RX_BUF_SIZE, + DMA_FROM_DEVICE); + len = cmdsts & CMDSTS_LEN_MASK; +#ifdef NS83820_VLAN_ACCEL_SUPPORT + /* NH: As was mentioned below, this chip is kinda + * brain dead about vlan tag stripping. Frames + * that are 64 bytes with a vlan header appended + * like arp frames, or pings, are flagged as Runts + * when the tag is stripped and hardware. This + * also means that the OK bit in the descriptor + * is cleared when the frame comes in so we have + * to do a specific length check here to make sure + * the frame would have been ok, had we not stripped + * the tag. + */ + if (likely((CMDSTS_OK & cmdsts) || + ((cmdsts & CMDSTS_RUNT) && len >= 56))) { +#else + if (likely(CMDSTS_OK & cmdsts)) { +#endif + skb_put(skb, len); + if (unlikely(!skb)) + goto netdev_mangle_me_harder_failed; + if (cmdsts & CMDSTS_DEST_MULTI) + ndev->stats.multicast++; + ndev->stats.rx_packets++; + ndev->stats.rx_bytes += len; + if ((extsts & 0x002a0000) && !(extsts & 0x00540000)) { + skb->ip_summed = CHECKSUM_UNNECESSARY; + } else { + skb_checksum_none_assert(skb); + } + skb->protocol = eth_type_trans(skb, ndev); +#ifdef NS83820_VLAN_ACCEL_SUPPORT + if(extsts & EXTSTS_VPKT) { + unsigned short tag; + + tag = ntohs(extsts & EXTSTS_VTG_MASK); + __vlan_hwaccel_put_tag(skb, htons(ETH_P_IPV6), tag); + } +#endif + rx_rc = netif_rx(skb); + if (NET_RX_DROP == rx_rc) { +netdev_mangle_me_harder_failed: + ndev->stats.rx_dropped++; + } + } else { + dev_kfree_skb_irq(skb); + } + + nr++; + next_rx = info->next_rx; + desc = info->descs + (DESC_SIZE * next_rx); + } + info->next_rx = next_rx; + info->next_rx_desc = info->descs + (DESC_SIZE * next_rx); + +out: + if (0 && !nr) { + Dprintk("dazed: cmdsts_f: %08x\n", cmdsts); + } + + spin_unlock_irqrestore(&info->lock, flags); +} + +static void rx_action(struct tasklet_struct *t) +{ + struct ns83820 *dev = from_tasklet(dev, t, rx_tasklet); + struct net_device *ndev = dev->ndev; + rx_irq(ndev); + writel(ihr, dev->base + IHR); + + spin_lock_irq(&dev->misc_lock); + dev->IMR_cache |= ISR_RXDESC; + writel(dev->IMR_cache, dev->base + IMR); + spin_unlock_irq(&dev->misc_lock); + + rx_irq(ndev); + ns83820_rx_kick(ndev); +} + +/* Packet Transmit code + */ +static inline void kick_tx(struct ns83820 *dev) +{ + dprintk("kick_tx(%p): tx_idx=%d free_idx=%d\n", + dev, dev->tx_idx, dev->tx_free_idx); + writel(CR_TXE, dev->base + CR); +} + +/* No spinlock needed on the transmit irq path as the interrupt handler is + * serialized. + */ +static void do_tx_done(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + u32 cmdsts, tx_done_idx; + __le32 *desc; + + dprintk("do_tx_done(%p)\n", ndev); + tx_done_idx = dev->tx_done_idx; + desc = dev->tx_descs + (tx_done_idx * DESC_SIZE); + + dprintk("tx_done_idx=%d free_idx=%d cmdsts=%08x\n", + tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS])); + while ((tx_done_idx != dev->tx_free_idx) && + !(CMDSTS_OWN & (cmdsts = le32_to_cpu(desc[DESC_CMDSTS]))) ) { + struct sk_buff *skb; + unsigned len; + dma_addr_t addr; + + if (cmdsts & CMDSTS_ERR) + ndev->stats.tx_errors++; + if (cmdsts & CMDSTS_OK) + ndev->stats.tx_packets++; + if (cmdsts & CMDSTS_OK) + ndev->stats.tx_bytes += cmdsts & 0xffff; + + dprintk("tx_done_idx=%d free_idx=%d cmdsts=%08x\n", + tx_done_idx, dev->tx_free_idx, cmdsts); + skb = dev->tx_skbs[tx_done_idx]; + dev->tx_skbs[tx_done_idx] = NULL; + dprintk("done(%p)\n", skb); + + len = cmdsts & CMDSTS_LEN_MASK; + addr = desc_addr_get(desc + DESC_BUFPTR); + if (skb) { + dma_unmap_single(&dev->pci_dev->dev, addr, len, + DMA_TO_DEVICE); + dev_consume_skb_irq(skb); + atomic_dec(&dev->nr_tx_skbs); + } else + dma_unmap_page(&dev->pci_dev->dev, addr, len, + DMA_TO_DEVICE); + + tx_done_idx = (tx_done_idx + 1) % NR_TX_DESC; + dev->tx_done_idx = tx_done_idx; + desc[DESC_CMDSTS] = cpu_to_le32(0); + mb(); + desc = dev->tx_descs + (tx_done_idx * DESC_SIZE); + } + + /* Allow network stack to resume queueing packets after we've + * finished transmitting at least 1/4 of the packets in the queue. + */ + if (netif_queue_stopped(ndev) && start_tx_okay(dev)) { + dprintk("start_queue(%p)\n", ndev); + netif_start_queue(ndev); + netif_wake_queue(ndev); + } +} + +static void ns83820_cleanup_tx(struct ns83820 *dev) +{ + unsigned i; + + for (i=0; i<NR_TX_DESC; i++) { + struct sk_buff *skb = dev->tx_skbs[i]; + dev->tx_skbs[i] = NULL; + if (skb) { + __le32 *desc = dev->tx_descs + (i * DESC_SIZE); + dma_unmap_single(&dev->pci_dev->dev, + desc_addr_get(desc + DESC_BUFPTR), + le32_to_cpu(desc[DESC_CMDSTS]) & CMDSTS_LEN_MASK, + DMA_TO_DEVICE); + dev_kfree_skb_irq(skb); + atomic_dec(&dev->nr_tx_skbs); + } + } + + memset(dev->tx_descs, 0, NR_TX_DESC * DESC_SIZE * 4); +} + +/* transmit routine. This code relies on the network layer serializing + * its calls in, but will run happily in parallel with the interrupt + * handler. This code currently has provisions for fragmenting tx buffers + * while trying to track down a bug in either the zero copy code or + * the tx fifo (hence the MAX_FRAG_LEN). + */ +static netdev_tx_t ns83820_hard_start_xmit(struct sk_buff *skb, + struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + u32 free_idx, cmdsts, extsts; + int nr_free, nr_frags; + unsigned tx_done_idx, last_idx; + dma_addr_t buf; + unsigned len; + skb_frag_t *frag; + int stopped = 0; + int do_intr = 0; + volatile __le32 *first_desc; + + dprintk("ns83820_hard_start_xmit\n"); + + nr_frags = skb_shinfo(skb)->nr_frags; +again: + if (unlikely(dev->CFG_cache & CFG_LNKSTS)) { + netif_stop_queue(ndev); + if (unlikely(dev->CFG_cache & CFG_LNKSTS)) + return NETDEV_TX_BUSY; + netif_start_queue(ndev); + } + + last_idx = free_idx = dev->tx_free_idx; + tx_done_idx = dev->tx_done_idx; + nr_free = (tx_done_idx + NR_TX_DESC-2 - free_idx) % NR_TX_DESC; + nr_free -= 1; + if (nr_free <= nr_frags) { + dprintk("stop_queue - not enough(%p)\n", ndev); + netif_stop_queue(ndev); + + /* Check again: we may have raced with a tx done irq */ + if (dev->tx_done_idx != tx_done_idx) { + dprintk("restart queue(%p)\n", ndev); + netif_start_queue(ndev); + goto again; + } + return NETDEV_TX_BUSY; + } + + if (free_idx == dev->tx_intr_idx) { + do_intr = 1; + dev->tx_intr_idx = (dev->tx_intr_idx + NR_TX_DESC/4) % NR_TX_DESC; + } + + nr_free -= nr_frags; + if (nr_free < MIN_TX_DESC_FREE) { + dprintk("stop_queue - last entry(%p)\n", ndev); + netif_stop_queue(ndev); + stopped = 1; + } + + frag = skb_shinfo(skb)->frags; + if (!nr_frags) + frag = NULL; + extsts = 0; + if (skb->ip_summed == CHECKSUM_PARTIAL) { + extsts |= EXTSTS_IPPKT; + if (IPPROTO_TCP == ip_hdr(skb)->protocol) + extsts |= EXTSTS_TCPPKT; + else if (IPPROTO_UDP == ip_hdr(skb)->protocol) + extsts |= EXTSTS_UDPPKT; + } + +#ifdef NS83820_VLAN_ACCEL_SUPPORT + if (skb_vlan_tag_present(skb)) { + /* fetch the vlan tag info out of the + * ancillary data if the vlan code + * is using hw vlan acceleration + */ + short tag = skb_vlan_tag_get(skb); + extsts |= (EXTSTS_VPKT | htons(tag)); + } +#endif + + len = skb->len; + if (nr_frags) + len -= skb->data_len; + buf = dma_map_single(&dev->pci_dev->dev, skb->data, len, + DMA_TO_DEVICE); + + first_desc = dev->tx_descs + (free_idx * DESC_SIZE); + + for (;;) { + volatile __le32 *desc = dev->tx_descs + (free_idx * DESC_SIZE); + + dprintk("frag[%3u]: %4u @ 0x%08Lx\n", free_idx, len, + (unsigned long long)buf); + last_idx = free_idx; + free_idx = (free_idx + 1) % NR_TX_DESC; + desc[DESC_LINK] = cpu_to_le32(dev->tx_phy_descs + (free_idx * DESC_SIZE * 4)); + desc_addr_set(desc + DESC_BUFPTR, buf); + desc[DESC_EXTSTS] = cpu_to_le32(extsts); + + cmdsts = ((nr_frags) ? CMDSTS_MORE : do_intr ? CMDSTS_INTR : 0); + cmdsts |= (desc == first_desc) ? 0 : CMDSTS_OWN; + cmdsts |= len; + desc[DESC_CMDSTS] = cpu_to_le32(cmdsts); + + if (!nr_frags) + break; + + buf = skb_frag_dma_map(&dev->pci_dev->dev, frag, 0, + skb_frag_size(frag), DMA_TO_DEVICE); + dprintk("frag: buf=%08Lx page=%08lx offset=%08lx\n", + (long long)buf, (long) page_to_pfn(frag->page), + frag->page_offset); + len = skb_frag_size(frag); + frag++; + nr_frags--; + } + dprintk("done pkt\n"); + + spin_lock_irq(&dev->tx_lock); + dev->tx_skbs[last_idx] = skb; + first_desc[DESC_CMDSTS] |= cpu_to_le32(CMDSTS_OWN); + dev->tx_free_idx = free_idx; + atomic_inc(&dev->nr_tx_skbs); + spin_unlock_irq(&dev->tx_lock); + + kick_tx(dev); + + /* Check again: we may have raced with a tx done irq */ + if (stopped && (dev->tx_done_idx != tx_done_idx) && start_tx_okay(dev)) + netif_start_queue(ndev); + + return NETDEV_TX_OK; +} + +static void ns83820_update_stats(struct ns83820 *dev) +{ + struct net_device *ndev = dev->ndev; + u8 __iomem *base = dev->base; + + /* the DP83820 will freeze counters, so we need to read all of them */ + ndev->stats.rx_errors += readl(base + 0x60) & 0xffff; + ndev->stats.rx_crc_errors += readl(base + 0x64) & 0xffff; + ndev->stats.rx_missed_errors += readl(base + 0x68) & 0xffff; + ndev->stats.rx_frame_errors += readl(base + 0x6c) & 0xffff; + /*ndev->stats.rx_symbol_errors +=*/ readl(base + 0x70); + ndev->stats.rx_length_errors += readl(base + 0x74) & 0xffff; + ndev->stats.rx_length_errors += readl(base + 0x78) & 0xffff; + /*ndev->stats.rx_badopcode_errors += */ readl(base + 0x7c); + /*ndev->stats.rx_pause_count += */ readl(base + 0x80); + /*ndev->stats.tx_pause_count += */ readl(base + 0x84); + ndev->stats.tx_carrier_errors += readl(base + 0x88) & 0xff; +} + +static struct net_device_stats *ns83820_get_stats(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + + /* somewhat overkill */ + spin_lock_irq(&dev->misc_lock); + ns83820_update_stats(dev); + spin_unlock_irq(&dev->misc_lock); + + return &ndev->stats; +} + +/* Let ethtool retrieve info */ +static int ns83820_get_link_ksettings(struct net_device *ndev, + struct ethtool_link_ksettings *cmd) +{ + struct ns83820 *dev = PRIV(ndev); + u32 cfg, tbicr; + int fullduplex = 0; + u32 supported; + + /* + * Here's the list of available ethtool commands from other drivers: + * cmd->advertising = + * ethtool_cmd_speed_set(cmd, ...) + * cmd->duplex = + * cmd->port = 0; + * cmd->phy_address = + * cmd->transceiver = 0; + * cmd->autoneg = + * cmd->maxtxpkt = 0; + * cmd->maxrxpkt = 0; + */ + + /* read current configuration */ + cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY; + readl(dev->base + TANAR); + tbicr = readl(dev->base + TBICR); + + fullduplex = (cfg & CFG_DUPSTS) ? 1 : 0; + + supported = SUPPORTED_Autoneg; + + if (dev->CFG_cache & CFG_TBI_EN) { + /* we have optical interface */ + supported |= SUPPORTED_1000baseT_Half | + SUPPORTED_1000baseT_Full | + SUPPORTED_FIBRE; + cmd->base.port = PORT_FIBRE; + } else { + /* we have copper */ + supported |= SUPPORTED_10baseT_Half | + SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Half | + SUPPORTED_100baseT_Full | SUPPORTED_1000baseT_Half | + SUPPORTED_1000baseT_Full | + SUPPORTED_MII; + cmd->base.port = PORT_MII; + } + + ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, + supported); + + cmd->base.duplex = fullduplex ? DUPLEX_FULL : DUPLEX_HALF; + switch (cfg / CFG_SPDSTS0 & 3) { + case 2: + cmd->base.speed = SPEED_1000; + break; + case 1: + cmd->base.speed = SPEED_100; + break; + default: + cmd->base.speed = SPEED_10; + break; + } + cmd->base.autoneg = (tbicr & TBICR_MR_AN_ENABLE) + ? AUTONEG_ENABLE : AUTONEG_DISABLE; + return 0; +} + +/* Let ethool change settings*/ +static int ns83820_set_link_ksettings(struct net_device *ndev, + const struct ethtool_link_ksettings *cmd) +{ + struct ns83820 *dev = PRIV(ndev); + u32 cfg, tanar; + int have_optical = 0; + int fullduplex = 0; + + /* read current configuration */ + cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY; + tanar = readl(dev->base + TANAR); + + if (dev->CFG_cache & CFG_TBI_EN) { + /* we have optical */ + have_optical = 1; + fullduplex = (tanar & TANAR_FULL_DUP); + + } else { + /* we have copper */ + fullduplex = cfg & CFG_DUPSTS; + } + + spin_lock_irq(&dev->misc_lock); + spin_lock(&dev->tx_lock); + + /* Set duplex */ + if (cmd->base.duplex != fullduplex) { + if (have_optical) { + /*set full duplex*/ + if (cmd->base.duplex == DUPLEX_FULL) { + /* force full duplex */ + writel(readl(dev->base + TXCFG) + | TXCFG_CSI | TXCFG_HBI | TXCFG_ATP, + dev->base + TXCFG); + writel(readl(dev->base + RXCFG) | RXCFG_RX_FD, + dev->base + RXCFG); + /* Light up full duplex LED */ + writel(readl(dev->base + GPIOR) | GPIOR_GP1_OUT, + dev->base + GPIOR); + } else { + /*TODO: set half duplex */ + } + + } else { + /*we have copper*/ + /* TODO: Set duplex for copper cards */ + } + printk(KERN_INFO "%s: Duplex set via ethtool\n", + ndev->name); + } + + /* Set autonegotiation */ + if (1) { + if (cmd->base.autoneg == AUTONEG_ENABLE) { + /* restart auto negotiation */ + writel(TBICR_MR_AN_ENABLE | TBICR_MR_RESTART_AN, + dev->base + TBICR); + writel(TBICR_MR_AN_ENABLE, dev->base + TBICR); + dev->linkstate = LINK_AUTONEGOTIATE; + + printk(KERN_INFO "%s: autoneg enabled via ethtool\n", + ndev->name); + } else { + /* disable auto negotiation */ + writel(0x00000000, dev->base + TBICR); + } + + printk(KERN_INFO "%s: autoneg %s via ethtool\n", ndev->name, + cmd->base.autoneg ? "ENABLED" : "DISABLED"); + } + + phy_intr(ndev); + spin_unlock(&dev->tx_lock); + spin_unlock_irq(&dev->misc_lock); + + return 0; +} +/* end ethtool get/set support -df */ + +static void ns83820_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info) +{ + struct ns83820 *dev = PRIV(ndev); + strscpy(info->driver, "ns83820", sizeof(info->driver)); + strscpy(info->version, VERSION, sizeof(info->version)); + strscpy(info->bus_info, pci_name(dev->pci_dev), sizeof(info->bus_info)); +} + +static u32 ns83820_get_link(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + u32 cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY; + return cfg & CFG_LNKSTS ? 1 : 0; +} + +static const struct ethtool_ops ops = { + .get_drvinfo = ns83820_get_drvinfo, + .get_link = ns83820_get_link, + .get_link_ksettings = ns83820_get_link_ksettings, + .set_link_ksettings = ns83820_set_link_ksettings, +}; + +static inline void ns83820_disable_interrupts(struct ns83820 *dev) +{ + writel(0, dev->base + IMR); + writel(0, dev->base + IER); + readl(dev->base + IER); +} + +/* this function is called in irq context from the ISR */ +static void ns83820_mib_isr(struct ns83820 *dev) +{ + unsigned long flags; + spin_lock_irqsave(&dev->misc_lock, flags); + ns83820_update_stats(dev); + spin_unlock_irqrestore(&dev->misc_lock, flags); +} + +static void ns83820_do_isr(struct net_device *ndev, u32 isr); +static irqreturn_t ns83820_irq(int foo, void *data) +{ + struct net_device *ndev = data; + struct ns83820 *dev = PRIV(ndev); + u32 isr; + dprintk("ns83820_irq(%p)\n", ndev); + + dev->ihr = 0; + + isr = readl(dev->base + ISR); + dprintk("irq: %08x\n", isr); + ns83820_do_isr(ndev, isr); + return IRQ_HANDLED; +} + +static void ns83820_do_isr(struct net_device *ndev, u32 isr) +{ + struct ns83820 *dev = PRIV(ndev); + unsigned long flags; + +#ifdef DEBUG + if (isr & ~(ISR_PHY | ISR_RXDESC | ISR_RXEARLY | ISR_RXOK | ISR_RXERR | ISR_TXIDLE | ISR_TXOK | ISR_TXDESC)) + Dprintk("odd isr? 0x%08x\n", isr); +#endif + + if (ISR_RXIDLE & isr) { + dev->rx_info.idle = 1; + Dprintk("oh dear, we are idle\n"); + ns83820_rx_kick(ndev); + } + + if ((ISR_RXDESC | ISR_RXOK) & isr) { + prefetch(dev->rx_info.next_rx_desc); + + spin_lock_irqsave(&dev->misc_lock, flags); + dev->IMR_cache &= ~(ISR_RXDESC | ISR_RXOK); + writel(dev->IMR_cache, dev->base + IMR); + spin_unlock_irqrestore(&dev->misc_lock, flags); + + tasklet_schedule(&dev->rx_tasklet); + //rx_irq(ndev); + //writel(4, dev->base + IHR); + } + + if ((ISR_RXIDLE | ISR_RXORN | ISR_RXDESC | ISR_RXOK | ISR_RXERR) & isr) + ns83820_rx_kick(ndev); + + if (unlikely(ISR_RXSOVR & isr)) { + //printk("overrun: rxsovr\n"); + ndev->stats.rx_fifo_errors++; + } + + if (unlikely(ISR_RXORN & isr)) { + //printk("overrun: rxorn\n"); + ndev->stats.rx_fifo_errors++; + } + + if ((ISR_RXRCMP & isr) && dev->rx_info.up) + writel(CR_RXE, dev->base + CR); + + if (ISR_TXIDLE & isr) { + u32 txdp; + txdp = readl(dev->base + TXDP); + dprintk("txdp: %08x\n", txdp); + txdp -= dev->tx_phy_descs; + dev->tx_idx = txdp / (DESC_SIZE * 4); + if (dev->tx_idx >= NR_TX_DESC) { + printk(KERN_ALERT "%s: BUG -- txdp out of range\n", ndev->name); + dev->tx_idx = 0; + } + /* The may have been a race between a pci originated read + * and the descriptor update from the cpu. Just in case, + * kick the transmitter if the hardware thinks it is on a + * different descriptor than we are. + */ + if (dev->tx_idx != dev->tx_free_idx) + kick_tx(dev); + } + + /* Defer tx ring processing until more than a minimum amount of + * work has accumulated + */ + if ((ISR_TXDESC | ISR_TXIDLE | ISR_TXOK | ISR_TXERR) & isr) { + spin_lock_irqsave(&dev->tx_lock, flags); + do_tx_done(ndev); + spin_unlock_irqrestore(&dev->tx_lock, flags); + + /* Disable TxOk if there are no outstanding tx packets. + */ + if ((dev->tx_done_idx == dev->tx_free_idx) && + (dev->IMR_cache & ISR_TXOK)) { + spin_lock_irqsave(&dev->misc_lock, flags); + dev->IMR_cache &= ~ISR_TXOK; + writel(dev->IMR_cache, dev->base + IMR); + spin_unlock_irqrestore(&dev->misc_lock, flags); + } + } + + /* The TxIdle interrupt can come in before the transmit has + * completed. Normally we reap packets off of the combination + * of TxDesc and TxIdle and leave TxOk disabled (since it + * occurs on every packet), but when no further irqs of this + * nature are expected, we must enable TxOk. + */ + if ((ISR_TXIDLE & isr) && (dev->tx_done_idx != dev->tx_free_idx)) { + spin_lock_irqsave(&dev->misc_lock, flags); + dev->IMR_cache |= ISR_TXOK; + writel(dev->IMR_cache, dev->base + IMR); + spin_unlock_irqrestore(&dev->misc_lock, flags); + } + + /* MIB interrupt: one of the statistics counters is about to overflow */ + if (unlikely(ISR_MIB & isr)) + ns83820_mib_isr(dev); + + /* PHY: Link up/down/negotiation state change */ + if (unlikely(ISR_PHY & isr)) + phy_intr(ndev); + +#if 0 /* Still working on the interrupt mitigation strategy */ + if (dev->ihr) + writel(dev->ihr, dev->base + IHR); +#endif +} + +static void ns83820_do_reset(struct ns83820 *dev, u32 which) +{ + Dprintk("resetting chip...\n"); + writel(which, dev->base + CR); + do { + schedule(); + } while (readl(dev->base + CR) & which); + Dprintk("okay!\n"); +} + +static int ns83820_stop(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + + /* FIXME: protect against interrupt handler? */ + del_timer_sync(&dev->tx_watchdog); + + ns83820_disable_interrupts(dev); + + dev->rx_info.up = 0; + synchronize_irq(dev->pci_dev->irq); + + ns83820_do_reset(dev, CR_RST); + + synchronize_irq(dev->pci_dev->irq); + + spin_lock_irq(&dev->misc_lock); + dev->IMR_cache &= ~(ISR_TXURN | ISR_TXIDLE | ISR_TXERR | ISR_TXDESC | ISR_TXOK); + spin_unlock_irq(&dev->misc_lock); + + ns83820_cleanup_rx(dev); + ns83820_cleanup_tx(dev); + + return 0; +} + +static void ns83820_tx_timeout(struct net_device *ndev, unsigned int txqueue) +{ + struct ns83820 *dev = PRIV(ndev); + u32 tx_done_idx; + __le32 *desc; + unsigned long flags; + + spin_lock_irqsave(&dev->tx_lock, flags); + + tx_done_idx = dev->tx_done_idx; + desc = dev->tx_descs + (tx_done_idx * DESC_SIZE); + + printk(KERN_INFO "%s: tx_timeout: tx_done_idx=%d free_idx=%d cmdsts=%08x\n", + ndev->name, + tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS])); + +#if defined(DEBUG) + { + u32 isr; + isr = readl(dev->base + ISR); + printk("irq: %08x imr: %08x\n", isr, dev->IMR_cache); + ns83820_do_isr(ndev, isr); + } +#endif + + do_tx_done(ndev); + + tx_done_idx = dev->tx_done_idx; + desc = dev->tx_descs + (tx_done_idx * DESC_SIZE); + + printk(KERN_INFO "%s: after: tx_done_idx=%d free_idx=%d cmdsts=%08x\n", + ndev->name, + tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS])); + + spin_unlock_irqrestore(&dev->tx_lock, flags); +} + +static void ns83820_tx_watch(struct timer_list *t) +{ + struct ns83820 *dev = from_timer(dev, t, tx_watchdog); + struct net_device *ndev = dev->ndev; + +#if defined(DEBUG) + printk("ns83820_tx_watch: %u %u %d\n", + dev->tx_done_idx, dev->tx_free_idx, atomic_read(&dev->nr_tx_skbs) + ); +#endif + + if (time_after(jiffies, dev_trans_start(ndev) + 1*HZ) && + dev->tx_done_idx != dev->tx_free_idx) { + printk(KERN_DEBUG "%s: ns83820_tx_watch: %u %u %d\n", + ndev->name, + dev->tx_done_idx, dev->tx_free_idx, + atomic_read(&dev->nr_tx_skbs)); + ns83820_tx_timeout(ndev, UINT_MAX); + } + + mod_timer(&dev->tx_watchdog, jiffies + 2*HZ); +} + +static int ns83820_open(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + unsigned i; + u32 desc; + int ret; + + dprintk("ns83820_open\n"); + + writel(0, dev->base + PQCR); + + ret = ns83820_setup_rx(ndev); + if (ret) + goto failed; + + memset(dev->tx_descs, 0, 4 * NR_TX_DESC * DESC_SIZE); + for (i=0; i<NR_TX_DESC; i++) { + dev->tx_descs[(i * DESC_SIZE) + DESC_LINK] + = cpu_to_le32( + dev->tx_phy_descs + + ((i+1) % NR_TX_DESC) * DESC_SIZE * 4); + } + + dev->tx_idx = 0; + dev->tx_done_idx = 0; + desc = dev->tx_phy_descs; + writel(0, dev->base + TXDP_HI); + writel(desc, dev->base + TXDP); + + timer_setup(&dev->tx_watchdog, ns83820_tx_watch, 0); + mod_timer(&dev->tx_watchdog, jiffies + 2*HZ); + + netif_start_queue(ndev); /* FIXME: wait for phy to come up */ + + return 0; + +failed: + ns83820_stop(ndev); + return ret; +} + +static void ns83820_getmac(struct ns83820 *dev, struct net_device *ndev) +{ + u8 mac[ETH_ALEN]; + unsigned i; + + for (i=0; i<3; i++) { + u32 data; + + /* Read from the perfect match memory: this is loaded by + * the chip from the EEPROM via the EELOAD self test. + */ + writel(i*2, dev->base + RFCR); + data = readl(dev->base + RFDR); + + mac[i * 2] = data; + mac[i * 2 + 1] = data >> 8; + } + eth_hw_addr_set(ndev, mac); +} + +static void ns83820_set_multicast(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + u8 __iomem *rfcr = dev->base + RFCR; + u32 and_mask = 0xffffffff; + u32 or_mask = 0; + u32 val; + + if (ndev->flags & IFF_PROMISC) + or_mask |= RFCR_AAU | RFCR_AAM; + else + and_mask &= ~(RFCR_AAU | RFCR_AAM); + + if (ndev->flags & IFF_ALLMULTI || netdev_mc_count(ndev)) + or_mask |= RFCR_AAM; + else + and_mask &= ~RFCR_AAM; + + spin_lock_irq(&dev->misc_lock); + val = (readl(rfcr) & and_mask) | or_mask; + /* Ramit : RFCR Write Fix doc says RFEN must be 0 modify other bits */ + writel(val & ~RFCR_RFEN, rfcr); + writel(val, rfcr); + spin_unlock_irq(&dev->misc_lock); +} + +static void ns83820_run_bist(struct net_device *ndev, const char *name, u32 enable, u32 done, u32 fail) +{ + struct ns83820 *dev = PRIV(ndev); + int timed_out = 0; + unsigned long start; + u32 status; + int loops = 0; + + dprintk("%s: start %s\n", ndev->name, name); + + start = jiffies; + + writel(enable, dev->base + PTSCR); + for (;;) { + loops++; + status = readl(dev->base + PTSCR); + if (!(status & enable)) + break; + if (status & done) + break; + if (status & fail) + break; + if (time_after_eq(jiffies, start + HZ)) { + timed_out = 1; + break; + } + schedule_timeout_uninterruptible(1); + } + + if (status & fail) + printk(KERN_INFO "%s: %s failed! (0x%08x & 0x%08x)\n", + ndev->name, name, status, fail); + else if (timed_out) + printk(KERN_INFO "%s: run_bist %s timed out! (%08x)\n", + ndev->name, name, status); + + dprintk("%s: done %s in %d loops\n", ndev->name, name, loops); +} + +#ifdef PHY_CODE_IS_FINISHED +static void ns83820_mii_write_bit(struct ns83820 *dev, int bit) +{ + /* drive MDC low */ + dev->MEAR_cache &= ~MEAR_MDC; + writel(dev->MEAR_cache, dev->base + MEAR); + readl(dev->base + MEAR); + + /* enable output, set bit */ + dev->MEAR_cache |= MEAR_MDDIR; + if (bit) + dev->MEAR_cache |= MEAR_MDIO; + else + dev->MEAR_cache &= ~MEAR_MDIO; + + /* set the output bit */ + writel(dev->MEAR_cache, dev->base + MEAR); + readl(dev->base + MEAR); + + /* Wait. Max clock rate is 2.5MHz, this way we come in under 1MHz */ + udelay(1); + + /* drive MDC high causing the data bit to be latched */ + dev->MEAR_cache |= MEAR_MDC; + writel(dev->MEAR_cache, dev->base + MEAR); + readl(dev->base + MEAR); + + /* Wait again... */ + udelay(1); +} + +static int ns83820_mii_read_bit(struct ns83820 *dev) +{ + int bit; + + /* drive MDC low, disable output */ + dev->MEAR_cache &= ~MEAR_MDC; + dev->MEAR_cache &= ~MEAR_MDDIR; + writel(dev->MEAR_cache, dev->base + MEAR); + readl(dev->base + MEAR); + + /* Wait. Max clock rate is 2.5MHz, this way we come in under 1MHz */ + udelay(1); + + /* drive MDC high causing the data bit to be latched */ + bit = (readl(dev->base + MEAR) & MEAR_MDIO) ? 1 : 0; + dev->MEAR_cache |= MEAR_MDC; + writel(dev->MEAR_cache, dev->base + MEAR); + + /* Wait again... */ + udelay(1); + + return bit; +} + +static unsigned ns83820_mii_read_reg(struct ns83820 *dev, unsigned phy, unsigned reg) +{ + unsigned data = 0; + int i; + + /* read some garbage so that we eventually sync up */ + for (i=0; i<64; i++) + ns83820_mii_read_bit(dev); + + ns83820_mii_write_bit(dev, 0); /* start */ + ns83820_mii_write_bit(dev, 1); + ns83820_mii_write_bit(dev, 1); /* opcode read */ + ns83820_mii_write_bit(dev, 0); + + /* write out the phy address: 5 bits, msb first */ + for (i=0; i<5; i++) + ns83820_mii_write_bit(dev, phy & (0x10 >> i)); + + /* write out the register address, 5 bits, msb first */ + for (i=0; i<5; i++) + ns83820_mii_write_bit(dev, reg & (0x10 >> i)); + + ns83820_mii_read_bit(dev); /* turn around cycles */ + ns83820_mii_read_bit(dev); + + /* read in the register data, 16 bits msb first */ + for (i=0; i<16; i++) { + data <<= 1; + data |= ns83820_mii_read_bit(dev); + } + + return data; +} + +static unsigned ns83820_mii_write_reg(struct ns83820 *dev, unsigned phy, unsigned reg, unsigned data) +{ + int i; + + /* read some garbage so that we eventually sync up */ + for (i=0; i<64; i++) + ns83820_mii_read_bit(dev); + + ns83820_mii_write_bit(dev, 0); /* start */ + ns83820_mii_write_bit(dev, 1); + ns83820_mii_write_bit(dev, 0); /* opcode read */ + ns83820_mii_write_bit(dev, 1); + + /* write out the phy address: 5 bits, msb first */ + for (i=0; i<5; i++) + ns83820_mii_write_bit(dev, phy & (0x10 >> i)); + + /* write out the register address, 5 bits, msb first */ + for (i=0; i<5; i++) + ns83820_mii_write_bit(dev, reg & (0x10 >> i)); + + ns83820_mii_read_bit(dev); /* turn around cycles */ + ns83820_mii_read_bit(dev); + + /* read in the register data, 16 bits msb first */ + for (i=0; i<16; i++) + ns83820_mii_write_bit(dev, (data >> (15 - i)) & 1); + + return data; +} + +static void ns83820_probe_phy(struct net_device *ndev) +{ + struct ns83820 *dev = PRIV(ndev); + int j; + unsigned a, b; + + for (j = 0; j < 0x16; j += 4) { + dprintk("%s: [0x%02x] %04x %04x %04x %04x\n", + ndev->name, j, + ns83820_mii_read_reg(dev, 1, 0 + j), + ns83820_mii_read_reg(dev, 1, 1 + j), + ns83820_mii_read_reg(dev, 1, 2 + j), + ns83820_mii_read_reg(dev, 1, 3 + j) + ); + } + + /* read firmware version: memory addr is 0x8402 and 0x8403 */ + ns83820_mii_write_reg(dev, 1, 0x16, 0x000d); + ns83820_mii_write_reg(dev, 1, 0x1e, 0x810e); + a = ns83820_mii_read_reg(dev, 1, 0x1d); + + ns83820_mii_write_reg(dev, 1, 0x16, 0x000d); + ns83820_mii_write_reg(dev, 1, 0x1e, 0x810e); + b = ns83820_mii_read_reg(dev, 1, 0x1d); + dprintk("version: 0x%04x 0x%04x\n", a, b); +} +#endif + +static const struct net_device_ops netdev_ops = { + .ndo_open = ns83820_open, + .ndo_stop = ns83820_stop, + .ndo_start_xmit = ns83820_hard_start_xmit, + .ndo_get_stats = ns83820_get_stats, + .ndo_set_rx_mode = ns83820_set_multicast, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, + .ndo_tx_timeout = ns83820_tx_timeout, +}; + +static int ns83820_init_one(struct pci_dev *pci_dev, + const struct pci_device_id *id) +{ + struct net_device *ndev; + struct ns83820 *dev; + long addr; + int err; + int using_dac = 0; + + /* See if we can set the dma mask early on; failure is fatal. */ + if (sizeof(dma_addr_t) == 8 && + !dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(64))) { + using_dac = 1; + } else if (!dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) { + using_dac = 0; + } else { + dev_warn(&pci_dev->dev, "dma_set_mask failed!\n"); + return -ENODEV; + } + + ndev = alloc_etherdev(sizeof(struct ns83820)); + err = -ENOMEM; + if (!ndev) + goto out; + + dev = PRIV(ndev); + dev->ndev = ndev; + + spin_lock_init(&dev->rx_info.lock); + spin_lock_init(&dev->tx_lock); + spin_lock_init(&dev->misc_lock); + dev->pci_dev = pci_dev; + + SET_NETDEV_DEV(ndev, &pci_dev->dev); + + INIT_WORK(&dev->tq_refill, queue_refill); + tasklet_setup(&dev->rx_tasklet, rx_action); + + err = pci_enable_device(pci_dev); + if (err) { + dev_info(&pci_dev->dev, "pci_enable_dev failed: %d\n", err); + goto out_free; + } + + pci_set_master(pci_dev); + addr = pci_resource_start(pci_dev, 1); + dev->base = ioremap(addr, PAGE_SIZE); + dev->tx_descs = dma_alloc_coherent(&pci_dev->dev, + 4 * DESC_SIZE * NR_TX_DESC, + &dev->tx_phy_descs, GFP_KERNEL); + dev->rx_info.descs = dma_alloc_coherent(&pci_dev->dev, + 4 * DESC_SIZE * NR_RX_DESC, + &dev->rx_info.phy_descs, GFP_KERNEL); + err = -ENOMEM; + if (!dev->base || !dev->tx_descs || !dev->rx_info.descs) + goto out_disable; + + dprintk("%p: %08lx %p: %08lx\n", + dev->tx_descs, (long)dev->tx_phy_descs, + dev->rx_info.descs, (long)dev->rx_info.phy_descs); + + ns83820_disable_interrupts(dev); + + dev->IMR_cache = 0; + + err = request_irq(pci_dev->irq, ns83820_irq, IRQF_SHARED, + DRV_NAME, ndev); + if (err) { + dev_info(&pci_dev->dev, "unable to register irq %d, err %d\n", + pci_dev->irq, err); + goto out_disable; + } + + /* + * FIXME: we are holding rtnl_lock() over obscenely long area only + * because some of the setup code uses dev->name. It's Wrong(tm) - + * we should be using driver-specific names for all that stuff. + * For now that will do, but we really need to come back and kill + * most of the dev_alloc_name() users later. + */ + rtnl_lock(); + err = dev_alloc_name(ndev, ndev->name); + if (err < 0) { + dev_info(&pci_dev->dev, "unable to get netdev name: %d\n", err); + goto out_free_irq; + } + + printk("%s: ns83820.c: 0x22c: %08x, subsystem: %04x:%04x\n", + ndev->name, le32_to_cpu(readl(dev->base + 0x22c)), + pci_dev->subsystem_vendor, pci_dev->subsystem_device); + + ndev->netdev_ops = &netdev_ops; + ndev->ethtool_ops = &ops; + ndev->watchdog_timeo = 5 * HZ; + pci_set_drvdata(pci_dev, ndev); + + ns83820_do_reset(dev, CR_RST); + + /* Must reset the ram bist before running it */ + writel(PTSCR_RBIST_RST, dev->base + PTSCR); + ns83820_run_bist(ndev, "sram bist", PTSCR_RBIST_EN, + PTSCR_RBIST_DONE, PTSCR_RBIST_FAIL); + ns83820_run_bist(ndev, "eeprom bist", PTSCR_EEBIST_EN, 0, + PTSCR_EEBIST_FAIL); + ns83820_run_bist(ndev, "eeprom load", PTSCR_EELOAD_EN, 0, 0); + + /* I love config registers */ + dev->CFG_cache = readl(dev->base + CFG); + + if ((dev->CFG_cache & CFG_PCI64_DET)) { + printk(KERN_INFO "%s: detected 64 bit PCI data bus.\n", + ndev->name); + /*dev->CFG_cache |= CFG_DATA64_EN;*/ + if (!(dev->CFG_cache & CFG_DATA64_EN)) + printk(KERN_INFO "%s: EEPROM did not enable 64 bit bus. Disabled.\n", + ndev->name); + } else + dev->CFG_cache &= ~(CFG_DATA64_EN); + + dev->CFG_cache &= (CFG_TBI_EN | CFG_MRM_DIS | CFG_MWI_DIS | + CFG_T64ADDR | CFG_DATA64_EN | CFG_EXT_125 | + CFG_M64ADDR); + dev->CFG_cache |= CFG_PINT_DUPSTS | CFG_PINT_LNKSTS | CFG_PINT_SPDSTS | + CFG_EXTSTS_EN | CFG_EXD | CFG_PESEL; + dev->CFG_cache |= CFG_REQALG; + dev->CFG_cache |= CFG_POW; + dev->CFG_cache |= CFG_TMRTEST; + + /* When compiled with 64 bit addressing, we must always enable + * the 64 bit descriptor format. + */ + if (sizeof(dma_addr_t) == 8) + dev->CFG_cache |= CFG_M64ADDR; + if (using_dac) + dev->CFG_cache |= CFG_T64ADDR; + + /* Big endian mode does not seem to do what the docs suggest */ + dev->CFG_cache &= ~CFG_BEM; + + /* setup optical transceiver if we have one */ + if (dev->CFG_cache & CFG_TBI_EN) { + printk(KERN_INFO "%s: enabling optical transceiver\n", + ndev->name); + writel(readl(dev->base + GPIOR) | 0x3e8, dev->base + GPIOR); + + /* setup auto negotiation feature advertisement */ + writel(readl(dev->base + TANAR) + | TANAR_HALF_DUP | TANAR_FULL_DUP, + dev->base + TANAR); + + /* start auto negotiation */ + writel(TBICR_MR_AN_ENABLE | TBICR_MR_RESTART_AN, + dev->base + TBICR); + writel(TBICR_MR_AN_ENABLE, dev->base + TBICR); + dev->linkstate = LINK_AUTONEGOTIATE; + + dev->CFG_cache |= CFG_MODE_1000; + } + + writel(dev->CFG_cache, dev->base + CFG); + dprintk("CFG: %08x\n", dev->CFG_cache); + + if (reset_phy) { + printk(KERN_INFO "%s: resetting phy\n", ndev->name); + writel(dev->CFG_cache | CFG_PHY_RST, dev->base + CFG); + msleep(10); + writel(dev->CFG_cache, dev->base + CFG); + } + +#if 0 /* Huh? This sets the PCI latency register. Should be done via + * the PCI layer. FIXME. + */ + if (readl(dev->base + SRR)) + writel(readl(dev->base+0x20c) | 0xfe00, dev->base + 0x20c); +#endif + + /* Note! The DMA burst size interacts with packet + * transmission, such that the largest packet that + * can be transmitted is 8192 - FLTH - burst size. + * If only the transmit fifo was larger... + */ + /* Ramit : 1024 DMA is not a good idea, it ends up banging + * some DELL and COMPAQ SMP systems */ + writel(TXCFG_CSI | TXCFG_HBI | TXCFG_ATP | TXCFG_MXDMA512 + | ((1600 / 32) * 0x100), + dev->base + TXCFG); + + /* Flush the interrupt holdoff timer */ + writel(0x000, dev->base + IHR); + writel(0x100, dev->base + IHR); + writel(0x000, dev->base + IHR); + + /* Set Rx to full duplex, don't accept runt, errored, long or length + * range errored packets. Use 512 byte DMA. + */ + /* Ramit : 1024 DMA is not a good idea, it ends up banging + * some DELL and COMPAQ SMP systems + * Turn on ALP, only we are accpeting Jumbo Packets */ + writel(RXCFG_AEP | RXCFG_ARP | RXCFG_AIRL | RXCFG_RX_FD + | RXCFG_STRIPCRC + //| RXCFG_ALP + | (RXCFG_MXDMA512) | 0, dev->base + RXCFG); + + /* Disable priority queueing */ + writel(0, dev->base + PQCR); + + /* Enable IP checksum validation and detetion of VLAN headers. + * Note: do not set the reject options as at least the 0x102 + * revision of the chip does not properly accept IP fragments + * at least for UDP. + */ + /* Ramit : Be sure to turn on RXCFG_ARP if VLAN's are enabled, since + * the MAC it calculates the packetsize AFTER stripping the VLAN + * header, and if a VLAN Tagged packet of 64 bytes is received (like + * a ping with a VLAN header) then the card, strips the 4 byte VLAN + * tag and then checks the packet size, so if RXCFG_ARP is not enabled, + * it discrards it!. These guys...... + * also turn on tag stripping if hardware acceleration is enabled + */ +#ifdef NS83820_VLAN_ACCEL_SUPPORT +#define VRCR_INIT_VALUE (VRCR_IPEN|VRCR_VTDEN|VRCR_VTREN) +#else +#define VRCR_INIT_VALUE (VRCR_IPEN|VRCR_VTDEN) +#endif + writel(VRCR_INIT_VALUE, dev->base + VRCR); + + /* Enable per-packet TCP/UDP/IP checksumming + * and per packet vlan tag insertion if + * vlan hardware acceleration is enabled + */ +#ifdef NS83820_VLAN_ACCEL_SUPPORT +#define VTCR_INIT_VALUE (VTCR_PPCHK|VTCR_VPPTI) +#else +#define VTCR_INIT_VALUE VTCR_PPCHK +#endif + writel(VTCR_INIT_VALUE, dev->base + VTCR); + + /* Ramit : Enable async and sync pause frames */ + /* writel(0, dev->base + PCR); */ + writel((PCR_PS_MCAST | PCR_PS_DA | PCR_PSEN | PCR_FFLO_4K | + PCR_FFHI_8K | PCR_STLO_4 | PCR_STHI_8 | PCR_PAUSE_CNT), + dev->base + PCR); + + /* Disable Wake On Lan */ + writel(0, dev->base + WCSR); + + ns83820_getmac(dev, ndev); + + /* Yes, we support dumb IP checksum on transmit */ + ndev->features |= NETIF_F_SG; + ndev->features |= NETIF_F_IP_CSUM; + + ndev->min_mtu = 0; + +#ifdef NS83820_VLAN_ACCEL_SUPPORT + /* We also support hardware vlan acceleration */ + ndev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; +#endif + + if (using_dac) { + printk(KERN_INFO "%s: using 64 bit addressing.\n", + ndev->name); + ndev->features |= NETIF_F_HIGHDMA; + } + + printk(KERN_INFO "%s: ns83820 v" VERSION ": DP83820 v%u.%u: %pM io=0x%08lx irq=%d f=%s\n", + ndev->name, + (unsigned)readl(dev->base + SRR) >> 8, + (unsigned)readl(dev->base + SRR) & 0xff, + ndev->dev_addr, addr, pci_dev->irq, + (ndev->features & NETIF_F_HIGHDMA) ? "h,sg" : "sg" + ); + +#ifdef PHY_CODE_IS_FINISHED + ns83820_probe_phy(ndev); +#endif + + err = register_netdevice(ndev); + if (err) { + printk(KERN_INFO "ns83820: unable to register netdev: %d\n", err); + goto out_cleanup; + } + rtnl_unlock(); + + return 0; + +out_cleanup: + ns83820_disable_interrupts(dev); /* paranoia */ +out_free_irq: + rtnl_unlock(); + free_irq(pci_dev->irq, ndev); +out_disable: + if (dev->base) + iounmap(dev->base); + dma_free_coherent(&pci_dev->dev, 4 * DESC_SIZE * NR_TX_DESC, + dev->tx_descs, dev->tx_phy_descs); + dma_free_coherent(&pci_dev->dev, 4 * DESC_SIZE * NR_RX_DESC, + dev->rx_info.descs, dev->rx_info.phy_descs); + pci_disable_device(pci_dev); +out_free: + free_netdev(ndev); +out: + return err; +} + +static void ns83820_remove_one(struct pci_dev *pci_dev) +{ + struct net_device *ndev = pci_get_drvdata(pci_dev); + struct ns83820 *dev = PRIV(ndev); /* ok even if NULL */ + + if (!ndev) /* paranoia */ + return; + + ns83820_disable_interrupts(dev); /* paranoia */ + + unregister_netdev(ndev); + free_irq(dev->pci_dev->irq, ndev); + iounmap(dev->base); + dma_free_coherent(&dev->pci_dev->dev, 4 * DESC_SIZE * NR_TX_DESC, + dev->tx_descs, dev->tx_phy_descs); + dma_free_coherent(&dev->pci_dev->dev, 4 * DESC_SIZE * NR_RX_DESC, + dev->rx_info.descs, dev->rx_info.phy_descs); + pci_disable_device(dev->pci_dev); + free_netdev(ndev); +} + +static const struct pci_device_id ns83820_pci_tbl[] = { + { 0x100b, 0x0022, PCI_ANY_ID, PCI_ANY_ID, 0, .driver_data = 0, }, + { 0, }, +}; + +static struct pci_driver driver = { + .name = "ns83820", + .id_table = ns83820_pci_tbl, + .probe = ns83820_init_one, + .remove = ns83820_remove_one, +#if 0 /* FIXME: implement */ + .suspend = , + .resume = , +#endif +}; + + +static int __init ns83820_init(void) +{ + printk(KERN_INFO "ns83820.c: National Semiconductor DP83820 10/100/1000 driver.\n"); + return pci_register_driver(&driver); +} + +static void __exit ns83820_exit(void) +{ + pci_unregister_driver(&driver); +} + +MODULE_AUTHOR("Benjamin LaHaise <bcrl@kvack.org>"); +MODULE_DESCRIPTION("National Semiconductor DP83820 10/100/1000 driver"); +MODULE_LICENSE("GPL"); + +MODULE_DEVICE_TABLE(pci, ns83820_pci_tbl); + +module_param(lnksts, int, 0); +MODULE_PARM_DESC(lnksts, "Polarity of LNKSTS bit"); + +module_param(ihr, int, 0); +MODULE_PARM_DESC(ihr, "Time in 100 us increments to delay interrupts (range 0-127)"); + +module_param(reset_phy, int, 0); +MODULE_PARM_DESC(reset_phy, "Set to 1 to reset the PHY on startup"); + +module_init(ns83820_init); +module_exit(ns83820_exit); |