diff options
Diffstat (limited to 'drivers/net/ethernet/i825xx')
| -rw-r--r-- | drivers/net/ethernet/i825xx/82596.c | 1536 | ||||
| -rw-r--r-- | drivers/net/ethernet/i825xx/Kconfig | 68 | ||||
| -rw-r--r-- | drivers/net/ethernet/i825xx/Makefile | 11 | ||||
| -rw-r--r-- | drivers/net/ethernet/i825xx/ether1.c | 1086 | ||||
| -rw-r--r-- | drivers/net/ethernet/i825xx/ether1.h | 277 | ||||
| -rw-r--r-- | drivers/net/ethernet/i825xx/lasi_82596.c | 239 | ||||
| -rw-r--r-- | drivers/net/ethernet/i825xx/lib82596.c | 1423 | ||||
| -rw-r--r-- | drivers/net/ethernet/i825xx/sni_82596.c | 191 | ||||
| -rw-r--r-- | drivers/net/ethernet/i825xx/sun3_82586.c | 1186 | ||||
| -rw-r--r-- | drivers/net/ethernet/i825xx/sun3_82586.h | 319 |
10 files changed, 6336 insertions, 0 deletions
diff --git a/drivers/net/ethernet/i825xx/82596.c b/drivers/net/ethernet/i825xx/82596.c new file mode 100644 index 0000000000..773d7aa29e --- /dev/null +++ b/drivers/net/ethernet/i825xx/82596.c @@ -0,0 +1,1536 @@ +// SPDX-License-Identifier: GPL-1.0+ +/* 82596.c: A generic 82596 ethernet driver for linux. */ +/* + Based on Apricot.c + Written 1994 by Mark Evans. + This driver is for the Apricot 82596 bus-master interface + + Modularised 12/94 Mark Evans + + + Modified to support the 82596 ethernet chips on 680x0 VME boards. + by Richard Hirst <richard@sleepie.demon.co.uk> + Renamed to be 82596.c + + 980825: Changed to receive directly in to sk_buffs which are + allocated at open() time. Eliminates copy on incoming frames + (small ones are still copied). Shared data now held in a + non-cached page, so we can run on 68060 in copyback mode. + + TBD: + * look at deferring rx frames rather than discarding (as per tulip) + * handle tx ring full as per tulip + * performance test to tune rx_copybreak + + Most of my modifications relate to the braindead big-endian + implementation by Intel. When the i596 is operating in + 'big-endian' mode, it thinks a 32 bit value of 0x12345678 + should be stored as 0x56781234. This is a real pain, when + you have linked lists which are shared by the 680x0 and the + i596. + + Driver skeleton + Written 1993 by Donald Becker. + Copyright 1993 United States Government as represented by the Director, + National Security Agency. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 + + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/init.h> +#include <linux/bitops.h> +#include <linux/gfp.h> +#include <linux/pgtable.h> + +#include <asm/io.h> +#include <asm/dma.h> +#include <asm/cacheflush.h> + +static char version[] __initdata = + "82596.c $Revision: 1.5 $\n"; + +#define DRV_NAME "82596" + +/* DEBUG flags + */ + +#define DEB_INIT 0x0001 +#define DEB_PROBE 0x0002 +#define DEB_SERIOUS 0x0004 +#define DEB_ERRORS 0x0008 +#define DEB_MULTI 0x0010 +#define DEB_TDR 0x0020 +#define DEB_OPEN 0x0040 +#define DEB_RESET 0x0080 +#define DEB_ADDCMD 0x0100 +#define DEB_STATUS 0x0200 +#define DEB_STARTTX 0x0400 +#define DEB_RXADDR 0x0800 +#define DEB_TXADDR 0x1000 +#define DEB_RXFRAME 0x2000 +#define DEB_INTS 0x4000 +#define DEB_STRUCT 0x8000 +#define DEB_ANY 0xffff + + +#define DEB(x,y) if (i596_debug & (x)) y + + +#if IS_ENABLED(CONFIG_MVME16x_NET) +#define ENABLE_MVME16x_NET +#endif +#if IS_ENABLED(CONFIG_BVME6000_NET) +#define ENABLE_BVME6000_NET +#endif + +#ifdef ENABLE_MVME16x_NET +#include <asm/mvme16xhw.h> +#endif +#ifdef ENABLE_BVME6000_NET +#include <asm/bvme6000hw.h> +#endif + +/* + * Define various macros for Channel Attention, word swapping etc., dependent + * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel. + */ + +#ifdef __mc68000__ +#define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) +#define ISCP_BUSY 0x00010000 +#else +#error 82596.c: unknown architecture +#endif + +/* + * These were the intel versions, left here for reference. There + * are currently no x86 users of this legacy i82596 chip. + */ +#if 0 +#define WSWAPrfd(x) ((struct i596_rfd *)((long)x)) +#define WSWAPrbd(x) ((struct i596_rbd *)((long)x)) +#define WSWAPiscp(x) ((struct i596_iscp *)((long)x)) +#define WSWAPscb(x) ((struct i596_scb *)((long)x)) +#define WSWAPcmd(x) ((struct i596_cmd *)((long)x)) +#define WSWAPtbd(x) ((struct i596_tbd *)((long)x)) +#define WSWAPchar(x) ((char *)((long)x)) +#define ISCP_BUSY 0x0001 +#endif + +/* + * The MPU_PORT command allows direct access to the 82596. With PORT access + * the following commands are available (p5-18). The 32-bit port command + * must be word-swapped with the most significant word written first. + * This only applies to VME boards. + */ +#define PORT_RESET 0x00 /* reset 82596 */ +#define PORT_SELFTEST 0x01 /* selftest */ +#define PORT_ALTSCP 0x02 /* alternate SCB address */ +#define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ + +static int i596_debug = (DEB_SERIOUS|DEB_PROBE); + +MODULE_AUTHOR("Richard Hirst"); +MODULE_DESCRIPTION("i82596 driver"); +MODULE_LICENSE("GPL"); + +module_param(i596_debug, int, 0); +MODULE_PARM_DESC(i596_debug, "i82596 debug mask"); + + +/* Copy frames shorter than rx_copybreak, otherwise pass on up in + * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha). + */ +static int rx_copybreak = 100; + +#define PKT_BUF_SZ 1536 +#define MAX_MC_CNT 64 + +#define I596_TOTAL_SIZE 17 + +#define I596_NULL ((void *)0xffffffff) + +#define CMD_EOL 0x8000 /* The last command of the list, stop. */ +#define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ +#define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ + +#define CMD_FLEX 0x0008 /* Enable flexible memory model */ + +enum commands { + CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, + CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 +}; + +#define STAT_C 0x8000 /* Set to 0 after execution */ +#define STAT_B 0x4000 /* Command being executed */ +#define STAT_OK 0x2000 /* Command executed ok */ +#define STAT_A 0x1000 /* Command aborted */ + +#define CUC_START 0x0100 +#define CUC_RESUME 0x0200 +#define CUC_SUSPEND 0x0300 +#define CUC_ABORT 0x0400 +#define RX_START 0x0010 +#define RX_RESUME 0x0020 +#define RX_SUSPEND 0x0030 +#define RX_ABORT 0x0040 + +#define TX_TIMEOUT (HZ/20) + + +struct i596_reg { + unsigned short porthi; + unsigned short portlo; + unsigned long ca; +}; + +#define EOF 0x8000 +#define SIZE_MASK 0x3fff + +struct i596_tbd { + unsigned short size; + unsigned short pad; + struct i596_tbd *next; + char *data; +}; + +/* The command structure has two 'next' pointers; v_next is the address of + * the next command as seen by the CPU, b_next is the address of the next + * command as seen by the 82596. The b_next pointer, as used by the 82596 + * always references the status field of the next command, rather than the + * v_next field, because the 82596 is unaware of v_next. It may seem more + * logical to put v_next at the end of the structure, but we cannot do that + * because the 82596 expects other fields to be there, depending on command + * type. + */ + +struct i596_cmd { + struct i596_cmd *v_next; /* Address from CPUs viewpoint */ + unsigned short status; + unsigned short command; + struct i596_cmd *b_next; /* Address from i596 viewpoint */ +}; + +struct tx_cmd { + struct i596_cmd cmd; + struct i596_tbd *tbd; + unsigned short size; + unsigned short pad; + struct sk_buff *skb; /* So we can free it after tx */ +}; + +struct tdr_cmd { + struct i596_cmd cmd; + unsigned short status; + unsigned short pad; +}; + +struct mc_cmd { + struct i596_cmd cmd; + short mc_cnt; + char mc_addrs[MAX_MC_CNT*6]; +}; + +struct sa_cmd { + struct i596_cmd cmd; + char eth_addr[8]; +}; + +struct cf_cmd { + struct i596_cmd cmd; + char i596_config[16]; +}; + +struct i596_rfd { + unsigned short stat; + unsigned short cmd; + struct i596_rfd *b_next; /* Address from i596 viewpoint */ + struct i596_rbd *rbd; + unsigned short count; + unsigned short size; + struct i596_rfd *v_next; /* Address from CPUs viewpoint */ + struct i596_rfd *v_prev; +}; + +struct i596_rbd { + unsigned short count; + unsigned short zero1; + struct i596_rbd *b_next; + unsigned char *b_data; /* Address from i596 viewpoint */ + unsigned short size; + unsigned short zero2; + struct sk_buff *skb; + struct i596_rbd *v_next; + struct i596_rbd *b_addr; /* This rbd addr from i596 view */ + unsigned char *v_data; /* Address from CPUs viewpoint */ +}; + +#define TX_RING_SIZE 64 +#define RX_RING_SIZE 16 + +struct i596_scb { + unsigned short status; + unsigned short command; + struct i596_cmd *cmd; + struct i596_rfd *rfd; + unsigned long crc_err; + unsigned long align_err; + unsigned long resource_err; + unsigned long over_err; + unsigned long rcvdt_err; + unsigned long short_err; + unsigned short t_on; + unsigned short t_off; +}; + +struct i596_iscp { + unsigned long stat; + struct i596_scb *scb; +}; + +struct i596_scp { + unsigned long sysbus; + unsigned long pad; + struct i596_iscp *iscp; +}; + +struct i596_private { + volatile struct i596_scp scp; + volatile struct i596_iscp iscp; + volatile struct i596_scb scb; + struct sa_cmd sa_cmd; + struct cf_cmd cf_cmd; + struct tdr_cmd tdr_cmd; + struct mc_cmd mc_cmd; + unsigned long stat; + int last_restart __attribute__((aligned(4))); + struct i596_rfd *rfd_head; + struct i596_rbd *rbd_head; + struct i596_cmd *cmd_tail; + struct i596_cmd *cmd_head; + int cmd_backlog; + unsigned long last_cmd; + struct i596_rfd rfds[RX_RING_SIZE]; + struct i596_rbd rbds[RX_RING_SIZE]; + struct tx_cmd tx_cmds[TX_RING_SIZE]; + struct i596_tbd tbds[TX_RING_SIZE]; + int next_tx_cmd; + spinlock_t lock; +}; + +static char init_setup[] = +{ + 0x8E, /* length, prefetch on */ + 0xC8, /* fifo to 8, monitor off */ +#ifdef CONFIG_VME + 0xc0, /* don't save bad frames */ +#else + 0x80, /* don't save bad frames */ +#endif + 0x2E, /* No source address insertion, 8 byte preamble */ + 0x00, /* priority and backoff defaults */ + 0x60, /* interframe spacing */ + 0x00, /* slot time LSB */ + 0xf2, /* slot time and retries */ + 0x00, /* promiscuous mode */ + 0x00, /* collision detect */ + 0x40, /* minimum frame length */ + 0xff, + 0x00, + 0x7f /* *multi IA */ }; + +static int i596_open(struct net_device *dev); +static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t i596_interrupt(int irq, void *dev_id); +static int i596_close(struct net_device *dev); +static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); +static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue); +static void print_eth(unsigned char *buf, char *str); +static void set_multicast_list(struct net_device *dev); + +static int rx_ring_size = RX_RING_SIZE; +static int ticks_limit = 25; +static int max_cmd_backlog = TX_RING_SIZE-1; + + +static inline void CA(struct net_device *dev) +{ +#ifdef ENABLE_MVME16x_NET + if (MACH_IS_MVME16x) { + ((struct i596_reg *) dev->base_addr)->ca = 1; + } +#endif +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile u32 i; + + i = *(volatile u32 *) (dev->base_addr); + } +#endif +} + + +static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x) +{ +#ifdef ENABLE_MVME16x_NET + if (MACH_IS_MVME16x) { + struct i596_reg *p = (struct i596_reg *) (dev->base_addr); + p->porthi = ((c) | (u32) (x)) & 0xffff; + p->portlo = ((c) | (u32) (x)) >> 16; + } +#endif +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) { + u32 v = (u32) (c) | (u32) (x); + v = ((u32) (v) << 16) | ((u32) (v) >> 16); + *(volatile u32 *) dev->base_addr = v; + udelay(1); + *(volatile u32 *) dev->base_addr = v; + } +#endif +} + + +static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str) +{ + while (--delcnt && lp->iscp.stat) + udelay(10); + if (!delcnt) { + printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", + dev->name, str, lp->scb.status, lp->scb.command); + return -1; + } + else + return 0; +} + + +static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str) +{ + while (--delcnt && lp->scb.command) + udelay(10); + if (!delcnt) { + printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", + dev->name, str, lp->scb.status, lp->scb.command); + return -1; + } + else + return 0; +} + + +static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str) +{ + volatile struct i596_cmd *c = cmd; + + while (--delcnt && c->command) + udelay(10); + if (!delcnt) { + printk(KERN_ERR "%s: %s.\n", dev->name, str); + return -1; + } + else + return 0; +} + + +static void i596_display_data(struct net_device *dev) +{ + struct i596_private *lp = dev->ml_priv; + struct i596_cmd *cmd; + struct i596_rfd *rfd; + struct i596_rbd *rbd; + + printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n", + &lp->scp, lp->scp.sysbus, lp->scp.iscp); + printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n", + &lp->iscp, lp->iscp.stat, lp->iscp.scb); + printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x," + " .cmd = %p, .rfd = %p\n", + &lp->scb, lp->scb.status, lp->scb.command, + lp->scb.cmd, lp->scb.rfd); + printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx," + " over %lx, rcvdt %lx, short %lx\n", + lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err, + lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err); + cmd = lp->cmd_head; + while (cmd != I596_NULL) { + printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n", + cmd, cmd->status, cmd->command, cmd->b_next); + cmd = cmd->v_next; + } + rfd = lp->rfd_head; + printk(KERN_ERR "rfd_head = %p\n", rfd); + do { + printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p," + " count %04x\n", + rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd, + rfd->count); + rfd = rfd->v_next; + } while (rfd != lp->rfd_head); + rbd = lp->rbd_head; + printk(KERN_ERR "rbd_head = %p\n", rbd); + do { + printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n", + rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size); + rbd = rbd->v_next; + } while (rbd != lp->rbd_head); +} + + +#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET) +static irqreturn_t i596_error(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; +#ifdef ENABLE_MVME16x_NET + if (MACH_IS_MVME16x) { + volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; + + pcc2[0x28] = 1; + pcc2[0x2b] = 0x1d; + } +#endif +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; + + *ethirq = 1; + *ethirq = 3; + } +#endif + printk(KERN_ERR "%s: Error interrupt\n", dev->name); + i596_display_data(dev); + return IRQ_HANDLED; +} +#endif + +static inline void remove_rx_bufs(struct net_device *dev) +{ + struct i596_private *lp = dev->ml_priv; + struct i596_rbd *rbd; + int i; + + for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) { + if (rbd->skb == NULL) + break; + dev_kfree_skb(rbd->skb); + rbd->skb = NULL; + } +} + +static inline int init_rx_bufs(struct net_device *dev) +{ + struct i596_private *lp = dev->ml_priv; + int i; + struct i596_rfd *rfd; + struct i596_rbd *rbd; + + /* First build the Receive Buffer Descriptor List */ + + for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) { + struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ); + + if (skb == NULL) { + remove_rx_bufs(dev); + return -ENOMEM; + } + + rbd->v_next = rbd+1; + rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1)); + rbd->b_addr = WSWAPrbd(virt_to_bus(rbd)); + rbd->skb = skb; + rbd->v_data = skb->data; + rbd->b_data = WSWAPchar(virt_to_bus(skb->data)); + rbd->size = PKT_BUF_SZ; +#ifdef __mc68000__ + cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ); +#endif + } + lp->rbd_head = lp->rbds; + rbd = lp->rbds + rx_ring_size - 1; + rbd->v_next = lp->rbds; + rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds)); + + /* Now build the Receive Frame Descriptor List */ + + for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) { + rfd->rbd = I596_NULL; + rfd->v_next = rfd+1; + rfd->v_prev = rfd-1; + rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1)); + rfd->cmd = CMD_FLEX; + } + lp->rfd_head = lp->rfds; + lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds)); + rfd = lp->rfds; + rfd->rbd = lp->rbd_head; + rfd->v_prev = lp->rfds + rx_ring_size - 1; + rfd = lp->rfds + rx_ring_size - 1; + rfd->v_next = lp->rfds; + rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds)); + rfd->cmd = CMD_EOL|CMD_FLEX; + + return 0; +} + + +static void rebuild_rx_bufs(struct net_device *dev) +{ + struct i596_private *lp = dev->ml_priv; + int i; + + /* Ensure rx frame/buffer descriptors are tidy */ + + for (i = 0; i < rx_ring_size; i++) { + lp->rfds[i].rbd = I596_NULL; + lp->rfds[i].cmd = CMD_FLEX; + } + lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX; + lp->rfd_head = lp->rfds; + lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds)); + lp->rbd_head = lp->rbds; + lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds)); +} + + +static int init_i596_mem(struct net_device *dev) +{ + struct i596_private *lp = dev->ml_priv; + unsigned long flags; + + MPU_PORT(dev, PORT_RESET, NULL); + + udelay(100); /* Wait 100us - seems to help */ + +#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET) +#ifdef ENABLE_MVME16x_NET + if (MACH_IS_MVME16x) { + volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; + + /* Disable all ints for now */ + pcc2[0x28] = 1; + pcc2[0x2a] = 0x48; + /* Following disables snooping. Snooping is not required + * as we make appropriate use of non-cached pages for + * shared data, and cache_push/cache_clear. + */ + pcc2[0x2b] = 0x08; + } +#endif +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; + + *ethirq = 1; + } +#endif + + /* change the scp address */ + + MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp)); + +#endif + + lp->last_cmd = jiffies; + +#ifdef ENABLE_MVME16x_NET + if (MACH_IS_MVME16x) + lp->scp.sysbus = 0x00000054; +#endif +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) + lp->scp.sysbus = 0x0000004c; +#endif + + lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp)); + lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb)); + lp->iscp.stat = ISCP_BUSY; + lp->cmd_backlog = 0; + + lp->cmd_head = lp->scb.cmd = I596_NULL; + +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) { + lp->scb.t_on = 7 * 25; + lp->scb.t_off = 1 * 25; + } +#endif + + DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name)); + + CA(dev); + + if (wait_istat(dev,lp,1000,"initialization timed out")) + goto failed; + DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name)); + + /* Ensure rx frame/buffer descriptors are tidy */ + rebuild_rx_bufs(dev); + lp->scb.command = 0; + +#ifdef ENABLE_MVME16x_NET + if (MACH_IS_MVME16x) { + volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; + + /* Enable ints, etc. now */ + pcc2[0x2a] = 0x55; /* Edge sensitive */ + pcc2[0x2b] = 0x15; + } +#endif +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; + + *ethirq = 3; + } +#endif + + + DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name)); + memcpy(lp->cf_cmd.i596_config, init_setup, 14); + lp->cf_cmd.cmd.command = CmdConfigure; + i596_add_cmd(dev, &lp->cf_cmd.cmd); + + DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name)); + memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, ETH_ALEN); + lp->sa_cmd.cmd.command = CmdSASetup; + i596_add_cmd(dev, &lp->sa_cmd.cmd); + + DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name)); + lp->tdr_cmd.cmd.command = CmdTDR; + i596_add_cmd(dev, &lp->tdr_cmd.cmd); + + spin_lock_irqsave (&lp->lock, flags); + + if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) { + spin_unlock_irqrestore (&lp->lock, flags); + goto failed; + } + DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name)); + lp->scb.command = RX_START; + CA(dev); + + spin_unlock_irqrestore (&lp->lock, flags); + + if (wait_cmd(dev,lp,1000,"RX_START not processed")) + goto failed; + DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name)); + return 0; + +failed: + printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name); + MPU_PORT(dev, PORT_RESET, NULL); + return -1; +} + +static inline int i596_rx(struct net_device *dev) +{ + struct i596_private *lp = dev->ml_priv; + struct i596_rfd *rfd; + struct i596_rbd *rbd; + int frames = 0; + + DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n", + lp->rfd_head, lp->rbd_head)); + + rfd = lp->rfd_head; /* Ref next frame to check */ + + while ((rfd->stat) & STAT_C) { /* Loop while complete frames */ + if (rfd->rbd == I596_NULL) + rbd = I596_NULL; + else if (rfd->rbd == lp->rbd_head->b_addr) + rbd = lp->rbd_head; + else { + printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name); + /* XXX Now what? */ + rbd = I596_NULL; + } + DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n", + rfd, rfd->rbd, rfd->stat)); + + if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) { + /* a good frame */ + int pkt_len = rbd->count & 0x3fff; + struct sk_buff *skb = rbd->skb; + int rx_in_place = 0; + + DEB(DEB_RXADDR,print_eth(rbd->v_data, "received")); + frames++; + + /* Check if the packet is long enough to just accept + * without copying to a properly sized skbuff. + */ + + if (pkt_len > rx_copybreak) { + struct sk_buff *newskb; + + /* Get fresh skbuff to replace filled one. */ + newskb = netdev_alloc_skb(dev, PKT_BUF_SZ); + if (newskb == NULL) { + skb = NULL; /* drop pkt */ + goto memory_squeeze; + } + /* Pass up the skb already on the Rx ring. */ + skb_put(skb, pkt_len); + rx_in_place = 1; + rbd->skb = newskb; + rbd->v_data = newskb->data; + rbd->b_data = WSWAPchar(virt_to_bus(newskb->data)); +#ifdef __mc68000__ + cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ); +#endif + } else { + skb = netdev_alloc_skb(dev, pkt_len + 2); + } +memory_squeeze: + if (skb == NULL) { + /* XXX tulip.c can defer packets here!! */ + dev->stats.rx_dropped++; + } else { + if (!rx_in_place) { + /* 16 byte align the data fields */ + skb_reserve(skb, 2); + skb_put_data(skb, rbd->v_data, + pkt_len); + } + skb->protocol=eth_type_trans(skb,dev); + skb->len = pkt_len; +#ifdef __mc68000__ + cache_clear(virt_to_phys(rbd->skb->data), + pkt_len); +#endif + netif_rx(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes+=pkt_len; + } + } + else { + DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n", + dev->name, rfd->stat)); + dev->stats.rx_errors++; + if ((rfd->stat) & 0x0001) + dev->stats.collisions++; + if ((rfd->stat) & 0x0080) + dev->stats.rx_length_errors++; + if ((rfd->stat) & 0x0100) + dev->stats.rx_over_errors++; + if ((rfd->stat) & 0x0200) + dev->stats.rx_fifo_errors++; + if ((rfd->stat) & 0x0400) + dev->stats.rx_frame_errors++; + if ((rfd->stat) & 0x0800) + dev->stats.rx_crc_errors++; + if ((rfd->stat) & 0x1000) + dev->stats.rx_length_errors++; + } + + /* Clear the buffer descriptor count and EOF + F flags */ + + if (rbd != I596_NULL && (rbd->count & 0x4000)) { + rbd->count = 0; + lp->rbd_head = rbd->v_next; + } + + /* Tidy the frame descriptor, marking it as end of list */ + + rfd->rbd = I596_NULL; + rfd->stat = 0; + rfd->cmd = CMD_EOL|CMD_FLEX; + rfd->count = 0; + + /* Remove end-of-list from old end descriptor */ + + rfd->v_prev->cmd = CMD_FLEX; + + /* Update record of next frame descriptor to process */ + + lp->scb.rfd = rfd->b_next; + lp->rfd_head = rfd->v_next; + rfd = lp->rfd_head; + } + + DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames)); + + return 0; +} + + +static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) +{ + struct i596_cmd *ptr; + + while (lp->cmd_head != I596_NULL) { + ptr = lp->cmd_head; + lp->cmd_head = ptr->v_next; + lp->cmd_backlog--; + + switch ((ptr->command) & 0x7) { + case CmdTx: + { + struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; + struct sk_buff *skb = tx_cmd->skb; + + dev_kfree_skb(skb); + + dev->stats.tx_errors++; + dev->stats.tx_aborted_errors++; + + ptr->v_next = ptr->b_next = I596_NULL; + tx_cmd->cmd.command = 0; /* Mark as free */ + break; + } + default: + ptr->v_next = ptr->b_next = I596_NULL; + } + } + + wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out"); + lp->scb.cmd = I596_NULL; +} + +static void i596_reset(struct net_device *dev, struct i596_private *lp, + int ioaddr) +{ + unsigned long flags; + + DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n")); + + spin_lock_irqsave (&lp->lock, flags); + + wait_cmd(dev,lp,100,"i596_reset timed out"); + + netif_stop_queue(dev); + + lp->scb.command = CUC_ABORT | RX_ABORT; + CA(dev); + + /* wait for shutdown */ + wait_cmd(dev,lp,1000,"i596_reset 2 timed out"); + spin_unlock_irqrestore (&lp->lock, flags); + + i596_cleanup_cmd(dev,lp); + i596_rx(dev); + + netif_start_queue(dev); + init_i596_mem(dev); +} + +static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) +{ + struct i596_private *lp = dev->ml_priv; + int ioaddr = dev->base_addr; + unsigned long flags; + + DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n")); + + cmd->status = 0; + cmd->command |= (CMD_EOL | CMD_INTR); + cmd->v_next = cmd->b_next = I596_NULL; + + spin_lock_irqsave (&lp->lock, flags); + + if (lp->cmd_head != I596_NULL) { + lp->cmd_tail->v_next = cmd; + lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status)); + } else { + lp->cmd_head = cmd; + wait_cmd(dev,lp,100,"i596_add_cmd timed out"); + lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status)); + lp->scb.command = CUC_START; + CA(dev); + } + lp->cmd_tail = cmd; + lp->cmd_backlog++; + + spin_unlock_irqrestore (&lp->lock, flags); + + if (lp->cmd_backlog > max_cmd_backlog) { + unsigned long tickssofar = jiffies - lp->last_cmd; + + if (tickssofar < ticks_limit) + return; + + printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name); + + i596_reset(dev, lp, ioaddr); + } +} + +static int i596_open(struct net_device *dev) +{ + int res = 0; + + DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq)); + + if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) { + printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq); + return -EAGAIN; + } +#ifdef ENABLE_MVME16x_NET + if (MACH_IS_MVME16x) { + if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) { + res = -EAGAIN; + goto err_irq_dev; + } + } +#endif + res = init_rx_bufs(dev); + if (res) + goto err_irq_56; + + netif_start_queue(dev); + + if (init_i596_mem(dev)) { + res = -EAGAIN; + goto err_queue; + } + + return 0; + +err_queue: + netif_stop_queue(dev); + remove_rx_bufs(dev); +err_irq_56: +#ifdef ENABLE_MVME16x_NET + free_irq(0x56, dev); +err_irq_dev: +#endif + free_irq(dev->irq, dev); + + return res; +} + +static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue) +{ + struct i596_private *lp = dev->ml_priv; + int ioaddr = dev->base_addr; + + /* Transmitter timeout, serious problems. */ + DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n", + dev->name)); + + dev->stats.tx_errors++; + + /* Try to restart the adaptor */ + if (lp->last_restart == dev->stats.tx_packets) { + DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n")); + /* Shutdown and restart */ + i596_reset (dev, lp, ioaddr); + } else { + /* Issue a channel attention signal */ + DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n")); + lp->scb.command = CUC_START | RX_START; + CA (dev); + lp->last_restart = dev->stats.tx_packets; + } + + netif_trans_update(dev); /* prevent tx timeout */ + netif_wake_queue (dev); +} + +static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct i596_private *lp = dev->ml_priv; + struct tx_cmd *tx_cmd; + struct i596_tbd *tbd; + short length = skb->len; + + DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n", + dev->name, skb->len, skb->data)); + + if (skb->len < ETH_ZLEN) { + if (skb_padto(skb, ETH_ZLEN)) + return NETDEV_TX_OK; + length = ETH_ZLEN; + } + netif_stop_queue(dev); + + tx_cmd = lp->tx_cmds + lp->next_tx_cmd; + tbd = lp->tbds + lp->next_tx_cmd; + + if (tx_cmd->cmd.command) { + printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n", + dev->name); + dev->stats.tx_dropped++; + + dev_kfree_skb(skb); + } else { + if (++lp->next_tx_cmd == TX_RING_SIZE) + lp->next_tx_cmd = 0; + tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd)); + tbd->next = I596_NULL; + + tx_cmd->cmd.command = CMD_FLEX | CmdTx; + tx_cmd->skb = skb; + + tx_cmd->pad = 0; + tx_cmd->size = 0; + tbd->pad = 0; + tbd->size = EOF | length; + + tbd->data = WSWAPchar(virt_to_bus(skb->data)); + +#ifdef __mc68000__ + cache_push(virt_to_phys(skb->data), length); +#endif + DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued")); + i596_add_cmd(dev, &tx_cmd->cmd); + + dev->stats.tx_packets++; + dev->stats.tx_bytes += length; + } + + netif_start_queue(dev); + + return NETDEV_TX_OK; +} + +static void print_eth(unsigned char *add, char *str) +{ + printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n", + add, add + 6, add, add[12], add[13], str); +} + +static const struct net_device_ops i596_netdev_ops = { + .ndo_open = i596_open, + .ndo_stop = i596_close, + .ndo_start_xmit = i596_start_xmit, + .ndo_set_rx_mode = set_multicast_list, + .ndo_tx_timeout = i596_tx_timeout, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static struct net_device * __init i82596_probe(void) +{ + struct net_device *dev; + int i; + struct i596_private *lp; + char eth_addr[8]; + static int probed; + int err; + + if (probed) + return ERR_PTR(-ENODEV); + probed++; + + dev = alloc_etherdev(0); + if (!dev) + return ERR_PTR(-ENOMEM); + +#ifdef ENABLE_MVME16x_NET + if (MACH_IS_MVME16x) { + if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) { + printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n"); + err = -ENODEV; + goto out; + } + memcpy(eth_addr, absolute_pointer(0xfffc1f2c), ETH_ALEN); /* YUCK! Get addr from NOVRAM */ + dev->base_addr = MVME_I596_BASE; + dev->irq = (unsigned) MVME16x_IRQ_I596; + goto found; + } +#endif +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE; + unsigned char msr = rtc[3]; + int i; + + rtc[3] |= 0x80; + for (i = 0; i < 6; i++) + eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */ + rtc[3] = msr; + dev->base_addr = BVME_I596_BASE; + dev->irq = (unsigned) BVME_IRQ_I596; + goto found; + } +#endif + err = -ENODEV; + goto out; + +found: + dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0); + if (!dev->mem_start) { + err = -ENOMEM; + goto out1; + } + + DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr)); + + for (i = 0; i < 6; i++) + DEB(DEB_PROBE,printk(" %2.2X", eth_addr[i])); + eth_hw_addr_set(dev, eth_addr); + + DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq)); + + DEB(DEB_PROBE,printk(KERN_INFO "%s", version)); + + /* The 82596-specific entries in the device structure. */ + dev->netdev_ops = &i596_netdev_ops; + dev->watchdog_timeo = TX_TIMEOUT; + + dev->ml_priv = (void *)(dev->mem_start); + + lp = dev->ml_priv; + DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), " + "lp->scb at 0x%08lx\n", + dev->name, (unsigned long)lp, + sizeof(struct i596_private), (unsigned long)&lp->scb)); + memset((void *) lp, 0, sizeof(struct i596_private)); + +#ifdef __mc68000__ + cache_push(virt_to_phys((void *)(dev->mem_start)), 4096); + cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096); + kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER); +#endif + lp->scb.command = 0; + lp->scb.cmd = I596_NULL; + lp->scb.rfd = I596_NULL; + spin_lock_init(&lp->lock); + + err = register_netdev(dev); + if (err) + goto out2; + return dev; +out2: +#ifdef __mc68000__ + /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, + * XXX which may be invalid (CONFIG_060_WRITETHROUGH) + */ + kernel_set_cachemode((void *)(dev->mem_start), 4096, + IOMAP_FULL_CACHING); +#endif + free_page ((u32)(dev->mem_start)); +out1: +out: + free_netdev(dev); + return ERR_PTR(err); +} + +static irqreturn_t i596_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct i596_private *lp; + short ioaddr; + unsigned short status, ack_cmd = 0; + int handled = 0; + +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) { + if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) { + i596_error(irq, dev_id); + return IRQ_HANDLED; + } + } +#endif + if (dev == NULL) { + printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq); + return IRQ_NONE; + } + + ioaddr = dev->base_addr; + lp = dev->ml_priv; + + spin_lock (&lp->lock); + + wait_cmd(dev,lp,100,"i596 interrupt, timeout"); + status = lp->scb.status; + + DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n", + dev->name, irq, status)); + + ack_cmd = status & 0xf000; + + if ((status & 0x8000) || (status & 0x2000)) { + struct i596_cmd *ptr; + + handled = 1; + if ((status & 0x8000)) + DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name)); + if ((status & 0x2000)) + DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700)); + + while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) { + ptr = lp->cmd_head; + + DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n", + lp->cmd_head->status, lp->cmd_head->command)); + lp->cmd_head = ptr->v_next; + lp->cmd_backlog--; + + switch ((ptr->command) & 0x7) { + case CmdTx: + { + struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; + struct sk_buff *skb = tx_cmd->skb; + + if ((ptr->status) & STAT_OK) { + DEB(DEB_TXADDR,print_eth(skb->data, "tx-done")); + } else { + dev->stats.tx_errors++; + if ((ptr->status) & 0x0020) + dev->stats.collisions++; + if (!((ptr->status) & 0x0040)) + dev->stats.tx_heartbeat_errors++; + if ((ptr->status) & 0x0400) + dev->stats.tx_carrier_errors++; + if ((ptr->status) & 0x0800) + dev->stats.collisions++; + if ((ptr->status) & 0x1000) + dev->stats.tx_aborted_errors++; + } + + dev_consume_skb_irq(skb); + + tx_cmd->cmd.command = 0; /* Mark free */ + break; + } + case CmdTDR: + { + unsigned short status = ((struct tdr_cmd *)ptr)->status; + + if (status & 0x8000) { + DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name)); + } else { + if (status & 0x4000) + printk(KERN_ERR "%s: Transceiver problem.\n", dev->name); + if (status & 0x2000) + printk(KERN_ERR "%s: Termination problem.\n", dev->name); + if (status & 0x1000) + printk(KERN_ERR "%s: Short circuit.\n", dev->name); + + DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff)); + } + break; + } + case CmdConfigure: + case CmdMulticastList: + /* Zap command so set_multicast_list() knows it is free */ + ptr->command = 0; + break; + } + ptr->v_next = ptr->b_next = I596_NULL; + lp->last_cmd = jiffies; + } + + ptr = lp->cmd_head; + while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) { + ptr->command &= 0x1fff; + ptr = ptr->v_next; + } + + if ((lp->cmd_head != I596_NULL)) + ack_cmd |= CUC_START; + lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status)); + } + if ((status & 0x1000) || (status & 0x4000)) { + if ((status & 0x4000)) + DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name)); + i596_rx(dev); + /* Only RX_START if stopped - RGH 07-07-96 */ + if (status & 0x1000) { + if (netif_running(dev)) { + DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status)); + ack_cmd |= RX_START; + dev->stats.rx_errors++; + dev->stats.rx_fifo_errors++; + rebuild_rx_bufs(dev); + } + } + } + wait_cmd(dev,lp,100,"i596 interrupt, timeout"); + lp->scb.command = ack_cmd; + +#ifdef ENABLE_MVME16x_NET + if (MACH_IS_MVME16x) { + /* Ack the interrupt */ + + volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; + + pcc2[0x2a] |= 0x08; + } +#endif +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; + + *ethirq = 1; + *ethirq = 3; + } +#endif + CA(dev); + + DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); + + spin_unlock (&lp->lock); + return IRQ_RETVAL(handled); +} + +static int i596_close(struct net_device *dev) +{ + struct i596_private *lp = dev->ml_priv; + unsigned long flags; + + netif_stop_queue(dev); + + DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n", + dev->name, lp->scb.status)); + + spin_lock_irqsave(&lp->lock, flags); + + wait_cmd(dev,lp,100,"close1 timed out"); + lp->scb.command = CUC_ABORT | RX_ABORT; + CA(dev); + + wait_cmd(dev,lp,100,"close2 timed out"); + + spin_unlock_irqrestore(&lp->lock, flags); + DEB(DEB_STRUCT,i596_display_data(dev)); + i596_cleanup_cmd(dev,lp); + +#ifdef ENABLE_MVME16x_NET + if (MACH_IS_MVME16x) { + volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; + + /* Disable all ints */ + pcc2[0x28] = 1; + pcc2[0x2a] = 0x40; + pcc2[0x2b] = 0x40; /* Set snooping bits now! */ + } +#endif +#ifdef ENABLE_BVME6000_NET + if (MACH_IS_BVME6000) { + volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; + + *ethirq = 1; + } +#endif + +#ifdef ENABLE_MVME16x_NET + free_irq(0x56, dev); +#endif + free_irq(dev->irq, dev); + remove_rx_bufs(dev); + + return 0; +} + +/* + * Set or clear the multicast filter for this adaptor. + */ + +static void set_multicast_list(struct net_device *dev) +{ + struct i596_private *lp = dev->ml_priv; + int config = 0, cnt; + + DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n", + dev->name, netdev_mc_count(dev), + dev->flags & IFF_PROMISC ? "ON" : "OFF", + dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); + + if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out")) + return; + + if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) { + lp->cf_cmd.i596_config[8] |= 0x01; + config = 1; + } + if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) { + lp->cf_cmd.i596_config[8] &= ~0x01; + config = 1; + } + if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) { + lp->cf_cmd.i596_config[11] &= ~0x20; + config = 1; + } + if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) { + lp->cf_cmd.i596_config[11] |= 0x20; + config = 1; + } + if (config) { + lp->cf_cmd.cmd.command = CmdConfigure; + i596_add_cmd(dev, &lp->cf_cmd.cmd); + } + + cnt = netdev_mc_count(dev); + if (cnt > MAX_MC_CNT) + { + cnt = MAX_MC_CNT; + printk(KERN_ERR "%s: Only %d multicast addresses supported", + dev->name, cnt); + } + + if (!netdev_mc_empty(dev)) { + struct netdev_hw_addr *ha; + unsigned char *cp; + struct mc_cmd *cmd; + + if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out")) + return; + cmd = &lp->mc_cmd; + cmd->cmd.command = CmdMulticastList; + cmd->mc_cnt = cnt * ETH_ALEN; + cp = cmd->mc_addrs; + netdev_for_each_mc_addr(ha, dev) { + if (!cnt--) + break; + memcpy(cp, ha->addr, ETH_ALEN); + if (i596_debug > 1) + DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n", + dev->name, cp)); + cp += ETH_ALEN; + } + i596_add_cmd(dev, &cmd->cmd); + } +} + +static struct net_device *dev_82596; + +static int debug = -1; +module_param(debug, int, 0); +MODULE_PARM_DESC(debug, "i82596 debug mask"); + +static int __init i82596_init(void) +{ + if (debug >= 0) + i596_debug = debug; + dev_82596 = i82596_probe(); + return PTR_ERR_OR_ZERO(dev_82596); +} +module_init(i82596_init); + +static void __exit i82596_cleanup(void) +{ + unregister_netdev(dev_82596); +#ifdef __mc68000__ + /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, + * XXX which may be invalid (CONFIG_060_WRITETHROUGH) + */ + + kernel_set_cachemode((void *)(dev_82596->mem_start), 4096, + IOMAP_FULL_CACHING); +#endif + free_page ((u32)(dev_82596->mem_start)); + free_netdev(dev_82596); +} +module_exit(i82596_cleanup); diff --git a/drivers/net/ethernet/i825xx/Kconfig b/drivers/net/ethernet/i825xx/Kconfig new file mode 100644 index 0000000000..3b5fab1238 --- /dev/null +++ b/drivers/net/ethernet/i825xx/Kconfig @@ -0,0 +1,68 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Intel 82596/82593/82596 network device configuration +# + +config NET_VENDOR_I825XX + bool "Intel (82586/82593/82596) devices" + default y + depends on NET_VENDOR_INTEL + help + If you have a network (Ethernet) card belonging to this class, say Y. + + Note that the answer to this question does not directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about these devices. If you say Y, you will be asked for + your specific card in the following questions. + +if NET_VENDOR_I825XX + +config ARM_ETHER1 + tristate "Acorn Ether1 support" + depends on ARM && ARCH_ACORN + help + If you have an Acorn system with one of these (AKA25) network cards, + you should say Y to this option if you wish to use it with Linux. + +config BVME6000_NET + tristate "BVME6000 Ethernet support" + depends on BVME6000 + help + This is the driver for the Ethernet interface on BVME4000 and + BVME6000 VME boards. Say Y here to include the driver for this chip + in your kernel. + To compile this driver as a module, choose M here. + +config LASI_82596 + tristate "Lasi ethernet" + depends on GSC + help + Say Y here to support the builtin Intel 82596 ethernet controller + found in Hewlett-Packard PA-RISC machines with 10Mbit ethernet. + +config MVME16x_NET + tristate "MVME16x Ethernet support" + depends on MVME16x + help + This is the driver for the Ethernet interface on the Motorola + MVME162, 166, 167, 172 and 177 boards. Say Y here to include the + driver for this chip in your kernel. + To compile this driver as a module, choose M here. + +config SNI_82596 + tristate "SNI RM ethernet" + depends on SNI_RM + help + Say Y here to support the on-board Intel 82596 ethernet controller + built into SNI RM machines. + +config SUN3_82586 + bool "Sun3 on-board Intel 82586 support" + depends on SUN3 + help + This driver enables support for the on-board Intel 82586 based + Ethernet adapter found on Sun 3/1xx and 3/2xx motherboards. Note + that this driver does not support 82586-based adapters on additional + VME boards. + +endif # NET_VENDOR_I825XX diff --git a/drivers/net/ethernet/i825xx/Makefile b/drivers/net/ethernet/i825xx/Makefile new file mode 100644 index 0000000000..422a19a5d9 --- /dev/null +++ b/drivers/net/ethernet/i825xx/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Intel 82586/82593/82596 chipset device drivers. +# + +obj-$(CONFIG_ARM_ETHER1) += ether1.o +obj-$(CONFIG_SUN3_82586) += sun3_82586.o +obj-$(CONFIG_LASI_82596) += lasi_82596.o +obj-$(CONFIG_SNI_82596) += sni_82596.o +obj-$(CONFIG_MVME16x_NET) += 82596.o +obj-$(CONFIG_BVME6000_NET) += 82596.o diff --git a/drivers/net/ethernet/i825xx/ether1.c b/drivers/net/ethernet/i825xx/ether1.c new file mode 100644 index 0000000000..3e7d7c4baf --- /dev/null +++ b/drivers/net/ethernet/i825xx/ether1.c @@ -0,0 +1,1086 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/acorn/net/ether1.c + * + * Copyright (C) 1996-2000 Russell King + * + * Acorn ether1 driver (82586 chip) for Acorn machines + * + * We basically keep two queues in the cards memory - one for transmit + * and one for receive. Each has a head and a tail. The head is where + * we/the chip adds packets to be transmitted/received, and the tail + * is where the transmitter has got to/where the receiver will stop. + * Both of these queues are circular, and since the chip is running + * all the time, we have to be careful when we modify the pointers etc + * so that the buffer memory contents is valid all the time. + * + * Change log: + * 1.00 RMK Released + * 1.01 RMK 19/03/1996 Transfers the last odd byte onto/off of the card now. + * 1.02 RMK 25/05/1997 Added code to restart RU if it goes not ready + * 1.03 RMK 14/09/1997 Cleaned up the handling of a reset during the TX interrupt. + * Should prevent lockup. + * 1.04 RMK 17/09/1997 Added more info when initialisation of chip goes wrong. + * TDR now only reports failure when chip reports non-zero + * TDR time-distance. + * 1.05 RMK 31/12/1997 Removed calls to dev_tint for 2.1 + * 1.06 RMK 10/02/2000 Updated for 2.3.43 + * 1.07 RMK 13/05/2000 Updated for 2.3.99-pre8 + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/fcntl.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/in.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/device.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/bitops.h> + +#include <asm/io.h> +#include <asm/dma.h> +#include <asm/ecard.h> + +#define __ETHER1_C +#include "ether1.h" + +static unsigned int net_debug = NET_DEBUG; + +#define BUFFER_SIZE 0x10000 +#define TX_AREA_START 0x00100 +#define TX_AREA_END 0x05000 +#define RX_AREA_START 0x05000 +#define RX_AREA_END 0x0fc00 + +static int ether1_open(struct net_device *dev); +static netdev_tx_t ether1_sendpacket(struct sk_buff *skb, + struct net_device *dev); +static irqreturn_t ether1_interrupt(int irq, void *dev_id); +static int ether1_close(struct net_device *dev); +static void ether1_setmulticastlist(struct net_device *dev); +static void ether1_timeout(struct net_device *dev, unsigned int txqueue); + +/* ------------------------------------------------------------------------- */ + +static char version[] = "ether1 ethernet driver (c) 2000 Russell King v1.07\n"; + +#define BUS_16 16 +#define BUS_8 8 + +/* ------------------------------------------------------------------------- */ + +#define DISABLEIRQS 1 +#define NORMALIRQS 0 + +#define ether1_readw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs) +#define ether1_writew(dev, val, addr, type, offset, svflgs) ether1_outw_p (dev, val, addr + (int)(&((type *)0)->offset), svflgs) + +static inline unsigned short +ether1_inw_p (struct net_device *dev, int addr, int svflgs) +{ + unsigned long flags; + unsigned short ret; + + if (svflgs) + local_irq_save (flags); + + writeb(addr >> 12, REG_PAGE); + ret = readw(ETHER1_RAM + ((addr & 4095) << 1)); + if (svflgs) + local_irq_restore (flags); + return ret; +} + +static inline void +ether1_outw_p (struct net_device *dev, unsigned short val, int addr, int svflgs) +{ + unsigned long flags; + + if (svflgs) + local_irq_save (flags); + + writeb(addr >> 12, REG_PAGE); + writew(val, ETHER1_RAM + ((addr & 4095) << 1)); + if (svflgs) + local_irq_restore (flags); +} + +/* + * Some inline assembler to allow fast transfers on to/off of the card. + * Since this driver depends on some features presented by the ARM + * specific architecture, and that you can't configure this driver + * without specifying ARM mode, this is not a problem. + * + * This routine is essentially an optimised memcpy from the card's + * onboard RAM to kernel memory. + */ +static void +ether1_writebuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length) +{ + unsigned int page, thislen, offset; + void __iomem *addr; + + offset = start & 4095; + page = start >> 12; + addr = ETHER1_RAM + (offset << 1); + + if (offset + length > 4096) + thislen = 4096 - offset; + else + thislen = length; + + do { + int used; + + writeb(page, REG_PAGE); + length -= thislen; + + __asm__ __volatile__( + "subs %3, %3, #2\n\ + bmi 2f\n\ +1: ldr %0, [%1], #2\n\ + mov %0, %0, lsl #16\n\ + orr %0, %0, %0, lsr #16\n\ + str %0, [%2], #4\n\ + subs %3, %3, #2\n\ + bmi 2f\n\ + ldr %0, [%1], #2\n\ + mov %0, %0, lsl #16\n\ + orr %0, %0, %0, lsr #16\n\ + str %0, [%2], #4\n\ + subs %3, %3, #2\n\ + bmi 2f\n\ + ldr %0, [%1], #2\n\ + mov %0, %0, lsl #16\n\ + orr %0, %0, %0, lsr #16\n\ + str %0, [%2], #4\n\ + subs %3, %3, #2\n\ + bmi 2f\n\ + ldr %0, [%1], #2\n\ + mov %0, %0, lsl #16\n\ + orr %0, %0, %0, lsr #16\n\ + str %0, [%2], #4\n\ + subs %3, %3, #2\n\ + bpl 1b\n\ +2: adds %3, %3, #1\n\ + ldreqb %0, [%1]\n\ + streqb %0, [%2]" + : "=&r" (used), "=&r" (data) + : "r" (addr), "r" (thislen), "1" (data)); + + addr = ETHER1_RAM; + + thislen = length; + if (thislen > 4096) + thislen = 4096; + page++; + } while (thislen); +} + +static void +ether1_readbuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length) +{ + unsigned int page, thislen, offset; + void __iomem *addr; + + offset = start & 4095; + page = start >> 12; + addr = ETHER1_RAM + (offset << 1); + + if (offset + length > 4096) + thislen = 4096 - offset; + else + thislen = length; + + do { + int used; + + writeb(page, REG_PAGE); + length -= thislen; + + __asm__ __volatile__( + "subs %3, %3, #2\n\ + bmi 2f\n\ +1: ldr %0, [%2], #4\n\ + strb %0, [%1], #1\n\ + mov %0, %0, lsr #8\n\ + strb %0, [%1], #1\n\ + subs %3, %3, #2\n\ + bmi 2f\n\ + ldr %0, [%2], #4\n\ + strb %0, [%1], #1\n\ + mov %0, %0, lsr #8\n\ + strb %0, [%1], #1\n\ + subs %3, %3, #2\n\ + bmi 2f\n\ + ldr %0, [%2], #4\n\ + strb %0, [%1], #1\n\ + mov %0, %0, lsr #8\n\ + strb %0, [%1], #1\n\ + subs %3, %3, #2\n\ + bmi 2f\n\ + ldr %0, [%2], #4\n\ + strb %0, [%1], #1\n\ + mov %0, %0, lsr #8\n\ + strb %0, [%1], #1\n\ + subs %3, %3, #2\n\ + bpl 1b\n\ +2: adds %3, %3, #1\n\ + ldreqb %0, [%2]\n\ + streqb %0, [%1]" + : "=&r" (used), "=&r" (data) + : "r" (addr), "r" (thislen), "1" (data)); + + addr = ETHER1_RAM; + + thislen = length; + if (thislen > 4096) + thislen = 4096; + page++; + } while (thislen); +} + +static int +ether1_ramtest(struct net_device *dev, unsigned char byte) +{ + unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL); + int i, ret = BUFFER_SIZE; + int max_errors = 15; + int bad = -1; + int bad_start = 0; + + if (!buffer) + return 1; + + memset (buffer, byte, BUFFER_SIZE); + ether1_writebuffer (dev, buffer, 0, BUFFER_SIZE); + memset (buffer, byte ^ 0xff, BUFFER_SIZE); + ether1_readbuffer (dev, buffer, 0, BUFFER_SIZE); + + for (i = 0; i < BUFFER_SIZE; i++) { + if (buffer[i] != byte) { + if (max_errors >= 0 && bad != buffer[i]) { + if (bad != -1) + printk ("\n"); + printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X", + dev->name, buffer[i], byte, i); + ret = -ENODEV; + max_errors --; + bad = buffer[i]; + bad_start = i; + } + } else { + if (bad != -1) { + if (bad_start == i - 1) + printk ("\n"); + else + printk (" - 0x%04X\n", i - 1); + bad = -1; + } + } + } + + if (bad != -1) + printk (" - 0x%04X\n", BUFFER_SIZE); + kfree (buffer); + + return ret; +} + +static int +ether1_reset (struct net_device *dev) +{ + writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); + return BUS_16; +} + +static int +ether1_init_2(struct net_device *dev) +{ + int i; + dev->mem_start = 0; + + i = ether1_ramtest (dev, 0x5a); + + if (i > 0) + i = ether1_ramtest (dev, 0x1e); + + if (i <= 0) + return -ENODEV; + + dev->mem_end = i; + return 0; +} + +/* + * These are the structures that are loaded into the ether RAM card to + * initialise the 82586 + */ + +/* at 0x0100 */ +#define NOP_ADDR (TX_AREA_START) +#define NOP_SIZE (0x06) +static nop_t init_nop = { + 0, + CMD_NOP, + NOP_ADDR +}; + +/* at 0x003a */ +#define TDR_ADDR (0x003a) +#define TDR_SIZE (0x08) +static tdr_t init_tdr = { + 0, + CMD_TDR | CMD_INTR, + NOP_ADDR, + 0 +}; + +/* at 0x002e */ +#define MC_ADDR (0x002e) +#define MC_SIZE (0x0c) +static mc_t init_mc = { + 0, + CMD_SETMULTICAST, + TDR_ADDR, + 0, + { { 0, } } +}; + +/* at 0x0022 */ +#define SA_ADDR (0x0022) +#define SA_SIZE (0x0c) +static sa_t init_sa = { + 0, + CMD_SETADDRESS, + MC_ADDR, + { 0, } +}; + +/* at 0x0010 */ +#define CFG_ADDR (0x0010) +#define CFG_SIZE (0x12) +static cfg_t init_cfg = { + 0, + CMD_CONFIG, + SA_ADDR, + 8, + 8, + CFG8_SRDY, + CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6), + 0, + 0x60, + 0, + CFG13_RETRY(15) | CFG13_SLOTH(2), + 0, +}; + +/* at 0x0000 */ +#define SCB_ADDR (0x0000) +#define SCB_SIZE (0x10) +static scb_t init_scb = { + 0, + SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX, + CFG_ADDR, + RX_AREA_START, + 0, + 0, + 0, + 0 +}; + +/* at 0xffee */ +#define ISCP_ADDR (0xffee) +#define ISCP_SIZE (0x08) +static iscp_t init_iscp = { + 1, + SCB_ADDR, + 0x0000, + 0x0000 +}; + +/* at 0xfff6 */ +#define SCP_ADDR (0xfff6) +#define SCP_SIZE (0x0a) +static scp_t init_scp = { + SCP_SY_16BBUS, + { 0, 0 }, + ISCP_ADDR, + 0 +}; + +#define RFD_SIZE (0x16) +static rfd_t init_rfd = { + 0, + 0, + 0, + 0, + { 0, }, + { 0, }, + 0 +}; + +#define RBD_SIZE (0x0a) +static rbd_t init_rbd = { + 0, + 0, + 0, + 0, + ETH_FRAME_LEN + 8 +}; + +#define TX_SIZE (0x08) +#define TBD_SIZE (0x08) + +static int +ether1_init_for_open (struct net_device *dev) +{ + int i, status, addr, next, next2; + int failures = 0; + unsigned long timeout; + + writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); + + for (i = 0; i < 6; i++) + init_sa.sa_addr[i] = dev->dev_addr[i]; + + /* load data structures into ether1 RAM */ + ether1_writebuffer (dev, &init_scp, SCP_ADDR, SCP_SIZE); + ether1_writebuffer (dev, &init_iscp, ISCP_ADDR, ISCP_SIZE); + ether1_writebuffer (dev, &init_scb, SCB_ADDR, SCB_SIZE); + ether1_writebuffer (dev, &init_cfg, CFG_ADDR, CFG_SIZE); + ether1_writebuffer (dev, &init_sa, SA_ADDR, SA_SIZE); + ether1_writebuffer (dev, &init_mc, MC_ADDR, MC_SIZE); + ether1_writebuffer (dev, &init_tdr, TDR_ADDR, TDR_SIZE); + ether1_writebuffer (dev, &init_nop, NOP_ADDR, NOP_SIZE); + + if (ether1_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) { + printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n", + dev->name); + return 1; + } + + /* + * setup circularly linked list of { rfd, rbd, buffer }, with + * all rfds circularly linked, rbds circularly linked. + * First rfd is linked to scp, first rbd is linked to first + * rfd. Last rbd has a suspend command. + */ + addr = RX_AREA_START; + do { + next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10; + next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10; + + if (next2 >= RX_AREA_END) { + next = RX_AREA_START; + init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND; + priv(dev)->rx_tail = addr; + } else + init_rfd.rfd_command = 0; + if (addr == RX_AREA_START) + init_rfd.rfd_rbdoffset = addr + RFD_SIZE; + else + init_rfd.rfd_rbdoffset = 0; + init_rfd.rfd_link = next; + init_rbd.rbd_link = next + RFD_SIZE; + init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE; + + ether1_writebuffer (dev, &init_rfd, addr, RFD_SIZE); + ether1_writebuffer (dev, &init_rbd, addr + RFD_SIZE, RBD_SIZE); + addr = next; + } while (next2 < RX_AREA_END); + + priv(dev)->tx_link = NOP_ADDR; + priv(dev)->tx_head = NOP_ADDR + NOP_SIZE; + priv(dev)->tx_tail = TDR_ADDR; + priv(dev)->rx_head = RX_AREA_START; + + /* release reset & give 586 a prod */ + priv(dev)->resetting = 1; + priv(dev)->initialising = 1; + writeb(CTRL_RST, REG_CONTROL); + writeb(0, REG_CONTROL); + writeb(CTRL_CA, REG_CONTROL); + + /* 586 should now unset iscp.busy */ + timeout = jiffies + HZ/2; + while (ether1_readw(dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) { + if (time_after(jiffies, timeout)) { + printk (KERN_WARNING "%s: can't initialise 82586: iscp is busy\n", dev->name); + return 1; + } + } + + /* check status of commands that we issued */ + timeout += HZ/10; + while (((status = ether1_readw(dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS)) + & STAT_COMPLETE) == 0) { + if (time_after(jiffies, timeout)) + break; + } + + if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { + printk (KERN_WARNING "%s: can't initialise 82586: config status %04X\n", dev->name, status); + printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, + ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); + failures += 1; + } + + timeout += HZ/10; + while (((status = ether1_readw(dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS)) + & STAT_COMPLETE) == 0) { + if (time_after(jiffies, timeout)) + break; + } + + if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { + printk (KERN_WARNING "%s: can't initialise 82586: set address status %04X\n", dev->name, status); + printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, + ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); + failures += 1; + } + + timeout += HZ/10; + while (((status = ether1_readw(dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS)) + & STAT_COMPLETE) == 0) { + if (time_after(jiffies, timeout)) + break; + } + + if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { + printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04X\n", dev->name, status); + printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, + ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); + failures += 1; + } + + timeout += HZ; + while (((status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS)) + & STAT_COMPLETE) == 0) { + if (time_after(jiffies, timeout)) + break; + } + + if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { + printk (KERN_WARNING "%s: can't tdr (ignored)\n", dev->name); + printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, + ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), + ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); + } else { + status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS); + if (status & TDR_XCVRPROB) + printk (KERN_WARNING "%s: i/f failed tdr: transceiver problem\n", dev->name); + else if ((status & (TDR_SHORT|TDR_OPEN)) && (status & TDR_TIME)) { +#ifdef FANCY + printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d.%d us away\n", dev->name, + status & TDR_SHORT ? "short" : "open", (status & TDR_TIME) / 10, + (status & TDR_TIME) % 10); +#else + printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d clks away\n", dev->name, + status & TDR_SHORT ? "short" : "open", (status & TDR_TIME)); +#endif + } + } + + if (failures) + ether1_reset (dev); + return failures ? 1 : 0; +} + +/* ------------------------------------------------------------------------- */ + +static int +ether1_txalloc (struct net_device *dev, int size) +{ + int start, tail; + + size = (size + 1) & ~1; + tail = priv(dev)->tx_tail; + + if (priv(dev)->tx_head + size > TX_AREA_END) { + if (tail > priv(dev)->tx_head) + return -1; + start = TX_AREA_START; + if (start + size > tail) + return -1; + priv(dev)->tx_head = start + size; + } else { + if (priv(dev)->tx_head < tail && (priv(dev)->tx_head + size) > tail) + return -1; + start = priv(dev)->tx_head; + priv(dev)->tx_head += size; + } + + return start; +} + +static int +ether1_open (struct net_device *dev) +{ + if (request_irq(dev->irq, ether1_interrupt, 0, "ether1", dev)) + return -EAGAIN; + + if (ether1_init_for_open (dev)) { + free_irq (dev->irq, dev); + return -EAGAIN; + } + + netif_start_queue(dev); + + return 0; +} + +static void +ether1_timeout(struct net_device *dev, unsigned int txqueue) +{ + printk(KERN_WARNING "%s: transmit timeout, network cable problem?\n", + dev->name); + printk(KERN_WARNING "%s: resetting device\n", dev->name); + + ether1_reset (dev); + + if (ether1_init_for_open (dev)) + printk (KERN_ERR "%s: unable to restart interface\n", dev->name); + + dev->stats.tx_errors++; + netif_wake_queue(dev); +} + +static netdev_tx_t +ether1_sendpacket (struct sk_buff *skb, struct net_device *dev) +{ + int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr; + unsigned long flags; + tx_t tx; + tbd_t tbd; + nop_t nop; + + if (priv(dev)->restart) { + printk(KERN_WARNING "%s: resetting device\n", dev->name); + + ether1_reset(dev); + + if (ether1_init_for_open(dev)) + printk(KERN_ERR "%s: unable to restart interface\n", dev->name); + else + priv(dev)->restart = 0; + } + + if (skb->len < ETH_ZLEN) { + if (skb_padto(skb, ETH_ZLEN)) + goto out; + } + + /* + * insert packet followed by a nop + */ + txaddr = ether1_txalloc (dev, TX_SIZE); + tbdaddr = ether1_txalloc (dev, TBD_SIZE); + dataddr = ether1_txalloc (dev, skb->len); + nopaddr = ether1_txalloc (dev, NOP_SIZE); + + tx.tx_status = 0; + tx.tx_command = CMD_TX | CMD_INTR; + tx.tx_link = nopaddr; + tx.tx_tbdoffset = tbdaddr; + tbd.tbd_opts = TBD_EOL | skb->len; + tbd.tbd_link = I82586_NULL; + tbd.tbd_bufl = dataddr; + tbd.tbd_bufh = 0; + nop.nop_status = 0; + nop.nop_command = CMD_NOP; + nop.nop_link = nopaddr; + + local_irq_save(flags); + ether1_writebuffer (dev, &tx, txaddr, TX_SIZE); + ether1_writebuffer (dev, &tbd, tbdaddr, TBD_SIZE); + ether1_writebuffer (dev, skb->data, dataddr, skb->len); + ether1_writebuffer (dev, &nop, nopaddr, NOP_SIZE); + tmp = priv(dev)->tx_link; + priv(dev)->tx_link = nopaddr; + + /* now reset the previous nop pointer */ + ether1_writew(dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS); + + local_irq_restore(flags); + + /* handle transmit */ + + /* check to see if we have room for a full sized ether frame */ + tmp = priv(dev)->tx_head; + tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); + priv(dev)->tx_head = tmp; + dev_kfree_skb (skb); + + if (tst == -1) + netif_stop_queue(dev); + + out: + return NETDEV_TX_OK; +} + +static void +ether1_xmit_done (struct net_device *dev) +{ + nop_t nop; + int caddr, tst; + + caddr = priv(dev)->tx_tail; + +again: + ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); + + switch (nop.nop_command & CMD_MASK) { + case CMD_TDR: + /* special case */ + if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) + != (unsigned short)I82586_NULL) { + ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t, + scb_command, NORMALIRQS); + writeb(CTRL_CA, REG_CONTROL); + } + priv(dev)->tx_tail = NOP_ADDR; + return; + + case CMD_NOP: + if (nop.nop_link == caddr) { + if (priv(dev)->initialising == 0) + printk (KERN_WARNING "%s: strange command complete with no tx command!\n", dev->name); + else + priv(dev)->initialising = 0; + return; + } + if (caddr == nop.nop_link) + return; + caddr = nop.nop_link; + goto again; + + case CMD_TX: + if (nop.nop_status & STAT_COMPLETE) + break; + printk (KERN_ERR "%s: strange command complete without completed command\n", dev->name); + priv(dev)->restart = 1; + return; + + default: + printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name, + nop.nop_command & CMD_MASK, caddr); + priv(dev)->restart = 1; + return; + } + + while (nop.nop_status & STAT_COMPLETE) { + if (nop.nop_status & STAT_OK) { + dev->stats.tx_packets++; + dev->stats.collisions += (nop.nop_status & STAT_COLLISIONS); + } else { + dev->stats.tx_errors++; + + if (nop.nop_status & STAT_COLLAFTERTX) + dev->stats.collisions++; + if (nop.nop_status & STAT_NOCARRIER) + dev->stats.tx_carrier_errors++; + if (nop.nop_status & STAT_TXLOSTCTS) + printk (KERN_WARNING "%s: cts lost\n", dev->name); + if (nop.nop_status & STAT_TXSLOWDMA) + dev->stats.tx_fifo_errors++; + if (nop.nop_status & STAT_COLLEXCESSIVE) + dev->stats.collisions += 16; + } + + if (nop.nop_link == caddr) { + printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n", dev->name); + break; + } + + caddr = nop.nop_link; + ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); + if ((nop.nop_command & CMD_MASK) != CMD_NOP) { + printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx command\n", dev->name); + break; + } + + if (caddr == nop.nop_link) + break; + + caddr = nop.nop_link; + ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); + if ((nop.nop_command & CMD_MASK) != CMD_TX) { + printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nop\n", dev->name); + break; + } + } + priv(dev)->tx_tail = caddr; + + caddr = priv(dev)->tx_head; + tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); + priv(dev)->tx_head = caddr; + if (tst != -1) + netif_wake_queue(dev); +} + +static void +ether1_recv_done (struct net_device *dev) +{ + int status; + int nexttail, rbdaddr; + rbd_t rbd; + + do { + status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS); + if ((status & RFD_COMPLETE) == 0) + break; + + rbdaddr = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS); + ether1_readbuffer (dev, &rbd, rbdaddr, RBD_SIZE); + + if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) { + int length = rbd.rbd_status & RBD_ACNT; + struct sk_buff *skb; + + length = (length + 1) & ~1; + skb = netdev_alloc_skb(dev, length + 2); + + if (skb) { + skb_reserve (skb, 2); + + ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length); + + skb->protocol = eth_type_trans (skb, dev); + netif_rx (skb); + dev->stats.rx_packets++; + } else + dev->stats.rx_dropped++; + } else { + printk(KERN_WARNING "%s: %s\n", dev->name, + (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid"); + dev->stats.rx_dropped++; + } + + nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS); + /* nexttail should be rx_head */ + if (nexttail != priv(dev)->rx_head) + printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n", + dev->name, nexttail, priv(dev)->rx_head); + ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS); + ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS); + ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS); + ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS); + + priv(dev)->rx_tail = nexttail; + priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS); + } while (1); +} + +static irqreturn_t +ether1_interrupt (int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *)dev_id; + int status; + + status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS); + + if (status) { + ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX), + SCB_ADDR, scb_t, scb_command, NORMALIRQS); + writeb(CTRL_CA | CTRL_ACK, REG_CONTROL); + if (status & SCB_STCX) { + ether1_xmit_done (dev); + } + if (status & SCB_STCNA) { + if (priv(dev)->resetting == 0) + printk (KERN_WARNING "%s: CU went not ready ???\n", dev->name); + else + priv(dev)->resetting += 1; + if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) + != (unsigned short)I82586_NULL) { + ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS); + writeb(CTRL_CA, REG_CONTROL); + } + if (priv(dev)->resetting == 2) + priv(dev)->resetting = 0; + } + if (status & SCB_STFR) { + ether1_recv_done (dev); + } + if (status & SCB_STRNR) { + if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) { + printk (KERN_WARNING "%s: RU went not ready: RU suspended\n", dev->name); + ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS); + writeb(CTRL_CA, REG_CONTROL); + dev->stats.rx_dropped++; /* we suspended due to lack of buffer space */ + } else + printk(KERN_WARNING "%s: RU went not ready: %04X\n", dev->name, + ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS)); + printk (KERN_WARNING "RU ptr = %04X\n", ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, + NORMALIRQS)); + } + } else + writeb(CTRL_ACK, REG_CONTROL); + + return IRQ_HANDLED; +} + +static int +ether1_close (struct net_device *dev) +{ + ether1_reset (dev); + + free_irq(dev->irq, dev); + + return 0; +} + +/* + * Set or clear the multicast filter for this adaptor. + * num_addrs == -1 Promiscuous mode, receive all packets. + * num_addrs == 0 Normal mode, clear multicast list. + * num_addrs > 0 Multicast mode, receive normal and MC packets, and do + * best-effort filtering. + */ +static void +ether1_setmulticastlist (struct net_device *dev) +{ +} + +/* ------------------------------------------------------------------------- */ + +static void ether1_banner(void) +{ + static unsigned int version_printed = 0; + + if (net_debug && version_printed++ == 0) + printk(KERN_INFO "%s", version); +} + +static const struct net_device_ops ether1_netdev_ops = { + .ndo_open = ether1_open, + .ndo_stop = ether1_close, + .ndo_start_xmit = ether1_sendpacket, + .ndo_set_rx_mode = ether1_setmulticastlist, + .ndo_tx_timeout = ether1_timeout, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, +}; + +static int +ether1_probe(struct expansion_card *ec, const struct ecard_id *id) +{ + struct net_device *dev; + u8 addr[ETH_ALEN]; + int i, ret = 0; + + ether1_banner(); + + ret = ecard_request_resources(ec); + if (ret) + goto out; + + dev = alloc_etherdev(sizeof(struct ether1_priv)); + if (!dev) { + ret = -ENOMEM; + goto release; + } + + SET_NETDEV_DEV(dev, &ec->dev); + + dev->irq = ec->irq; + priv(dev)->base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); + if (!priv(dev)->base) { + ret = -ENOMEM; + goto free; + } + + if ((priv(dev)->bus_type = ether1_reset(dev)) == 0) { + ret = -ENODEV; + goto free; + } + + for (i = 0; i < 6; i++) + addr[i] = readb(IDPROM_ADDRESS + (i << 2)); + eth_hw_addr_set(dev, addr); + + if (ether1_init_2(dev)) { + ret = -ENODEV; + goto free; + } + + dev->netdev_ops = ðer1_netdev_ops; + dev->watchdog_timeo = 5 * HZ / 100; + + ret = register_netdev(dev); + if (ret) + goto free; + + printk(KERN_INFO "%s: ether1 in slot %d, %pM\n", + dev->name, ec->slot_no, dev->dev_addr); + + ecard_set_drvdata(ec, dev); + return 0; + + free: + free_netdev(dev); + release: + ecard_release_resources(ec); + out: + return ret; +} + +static void ether1_remove(struct expansion_card *ec) +{ + struct net_device *dev = ecard_get_drvdata(ec); + + ecard_set_drvdata(ec, NULL); + + unregister_netdev(dev); + free_netdev(dev); + ecard_release_resources(ec); +} + +static const struct ecard_id ether1_ids[] = { + { MANU_ACORN, PROD_ACORN_ETHER1 }, + { 0xffff, 0xffff } +}; + +static struct ecard_driver ether1_driver = { + .probe = ether1_probe, + .remove = ether1_remove, + .id_table = ether1_ids, + .drv = { + .name = "ether1", + }, +}; + +static int __init ether1_init(void) +{ + return ecard_register_driver(ðer1_driver); +} + +static void __exit ether1_exit(void) +{ + ecard_remove_driver(ðer1_driver); +} + +module_init(ether1_init); +module_exit(ether1_exit); + +MODULE_LICENSE("GPL"); diff --git a/drivers/net/ethernet/i825xx/ether1.h b/drivers/net/ethernet/i825xx/ether1.h new file mode 100644 index 0000000000..3926e042fe --- /dev/null +++ b/drivers/net/ethernet/i825xx/ether1.h @@ -0,0 +1,277 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * linux/drivers/acorn/net/ether1.h + * + * Copyright (C) 1996 Russell King + * + * Network driver for Acorn Ether1 cards. + */ + +#ifndef _LINUX_ether1_H +#define _LINUX_ether1_H + +#ifdef __ETHER1_C +/* use 0 for production, 1 for verification, >2 for debug */ +#ifndef NET_DEBUG +#define NET_DEBUG 0 +#endif + +#define priv(dev) ((struct ether1_priv *)netdev_priv(dev)) + +/* Page register */ +#define REG_PAGE (priv(dev)->base + 0x0000) + +/* Control register */ +#define REG_CONTROL (priv(dev)->base + 0x0004) +#define CTRL_RST 0x01 +#define CTRL_LOOPBACK 0x02 +#define CTRL_CA 0x04 +#define CTRL_ACK 0x08 + +#define ETHER1_RAM (priv(dev)->base + 0x2000) + +/* HW address */ +#define IDPROM_ADDRESS (priv(dev)->base + 0x0024) + +struct ether1_priv { + void __iomem *base; + unsigned int tx_link; + unsigned int tx_head; + volatile unsigned int tx_tail; + volatile unsigned int rx_head; + volatile unsigned int rx_tail; + unsigned char bus_type; + unsigned char resetting; + unsigned char initialising : 1; + unsigned char restart : 1; +}; + +#define I82586_NULL (-1) + +typedef struct { /* tdr */ + unsigned short tdr_status; + unsigned short tdr_command; + unsigned short tdr_link; + unsigned short tdr_result; +#define TDR_TIME (0x7ff) +#define TDR_SHORT (1 << 12) +#define TDR_OPEN (1 << 13) +#define TDR_XCVRPROB (1 << 14) +#define TDR_LNKOK (1 << 15) +} tdr_t; + +typedef struct { /* transmit */ + unsigned short tx_status; + unsigned short tx_command; + unsigned short tx_link; + unsigned short tx_tbdoffset; +} tx_t; + +typedef struct { /* tbd */ + unsigned short tbd_opts; +#define TBD_CNT (0x3fff) +#define TBD_EOL (1 << 15) + unsigned short tbd_link; + unsigned short tbd_bufl; + unsigned short tbd_bufh; +} tbd_t; + +typedef struct { /* rfd */ + unsigned short rfd_status; +#define RFD_NOEOF (1 << 6) +#define RFD_FRAMESHORT (1 << 7) +#define RFD_DMAOVRN (1 << 8) +#define RFD_NORESOURCES (1 << 9) +#define RFD_ALIGNERROR (1 << 10) +#define RFD_CRCERROR (1 << 11) +#define RFD_OK (1 << 13) +#define RFD_FDCONSUMED (1 << 14) +#define RFD_COMPLETE (1 << 15) + unsigned short rfd_command; +#define RFD_CMDSUSPEND (1 << 14) +#define RFD_CMDEL (1 << 15) + unsigned short rfd_link; + unsigned short rfd_rbdoffset; + unsigned char rfd_dest[6]; + unsigned char rfd_src[6]; + unsigned short rfd_len; +} rfd_t; + +typedef struct { /* rbd */ + unsigned short rbd_status; +#define RBD_ACNT (0x3fff) +#define RBD_ACNTVALID (1 << 14) +#define RBD_EOF (1 << 15) + unsigned short rbd_link; + unsigned short rbd_bufl; + unsigned short rbd_bufh; + unsigned short rbd_len; +} rbd_t; + +typedef struct { /* nop */ + unsigned short nop_status; + unsigned short nop_command; + unsigned short nop_link; +} nop_t; + +typedef struct { /* set multicast */ + unsigned short mc_status; + unsigned short mc_command; + unsigned short mc_link; + unsigned short mc_cnt; + unsigned char mc_addrs[1][6]; +} mc_t; + +typedef struct { /* set address */ + unsigned short sa_status; + unsigned short sa_command; + unsigned short sa_link; + unsigned char sa_addr[6]; +} sa_t; + +typedef struct { /* config command */ + unsigned short cfg_status; + unsigned short cfg_command; + unsigned short cfg_link; + unsigned char cfg_bytecnt; /* size foll data: 4 - 12 */ + unsigned char cfg_fifolim; /* FIFO threshold */ + unsigned char cfg_byte8; +#define CFG8_SRDY (1 << 6) +#define CFG8_SAVEBADF (1 << 7) + unsigned char cfg_byte9; +#define CFG9_ADDRLEN(x) (x) +#define CFG9_ADDRLENBUF (1 << 3) +#define CFG9_PREAMB2 (0 << 4) +#define CFG9_PREAMB4 (1 << 4) +#define CFG9_PREAMB8 (2 << 4) +#define CFG9_PREAMB16 (3 << 4) +#define CFG9_ILOOPBACK (1 << 6) +#define CFG9_ELOOPBACK (1 << 7) + unsigned char cfg_byte10; +#define CFG10_LINPRI(x) (x) +#define CFG10_ACR(x) (x << 4) +#define CFG10_BOFMET (1 << 7) + unsigned char cfg_ifs; + unsigned char cfg_slotl; + unsigned char cfg_byte13; +#define CFG13_SLOTH(x) (x) +#define CFG13_RETRY(x) (x << 4) + unsigned char cfg_byte14; +#define CFG14_PROMISC (1 << 0) +#define CFG14_DISBRD (1 << 1) +#define CFG14_MANCH (1 << 2) +#define CFG14_TNCRS (1 << 3) +#define CFG14_NOCRC (1 << 4) +#define CFG14_CRC16 (1 << 5) +#define CFG14_BTSTF (1 << 6) +#define CFG14_FLGPAD (1 << 7) + unsigned char cfg_byte15; +#define CFG15_CSTF(x) (x) +#define CFG15_ICSS (1 << 3) +#define CFG15_CDTF(x) (x << 4) +#define CFG15_ICDS (1 << 7) + unsigned short cfg_minfrmlen; +} cfg_t; + +typedef struct { /* scb */ + unsigned short scb_status; /* status of 82586 */ +#define SCB_STRXMASK (7 << 4) /* Receive unit status */ +#define SCB_STRXIDLE (0 << 4) /* Idle */ +#define SCB_STRXSUSP (1 << 4) /* Suspended */ +#define SCB_STRXNRES (2 << 4) /* No resources */ +#define SCB_STRXRDY (4 << 4) /* Ready */ +#define SCB_STCUMASK (7 << 8) /* Command unit status */ +#define SCB_STCUIDLE (0 << 8) /* Idle */ +#define SCB_STCUSUSP (1 << 8) /* Suspended */ +#define SCB_STCUACTV (2 << 8) /* Active */ +#define SCB_STRNR (1 << 12) /* Receive unit not ready */ +#define SCB_STCNA (1 << 13) /* Command unit not ready */ +#define SCB_STFR (1 << 14) /* Frame received */ +#define SCB_STCX (1 << 15) /* Command completed */ + unsigned short scb_command; /* Next command */ +#define SCB_CMDRXSTART (1 << 4) /* Start (at rfa_offset) */ +#define SCB_CMDRXRESUME (2 << 4) /* Resume reception */ +#define SCB_CMDRXSUSPEND (3 << 4) /* Suspend reception */ +#define SCB_CMDRXABORT (4 << 4) /* Abort reception */ +#define SCB_CMDCUCSTART (1 << 8) /* Start (at cbl_offset) */ +#define SCB_CMDCUCRESUME (2 << 8) /* Resume execution */ +#define SCB_CMDCUCSUSPEND (3 << 8) /* Suspend execution */ +#define SCB_CMDCUCABORT (4 << 8) /* Abort execution */ +#define SCB_CMDACKRNR (1 << 12) /* Ack RU not ready */ +#define SCB_CMDACKCNA (1 << 13) /* Ack CU not ready */ +#define SCB_CMDACKFR (1 << 14) /* Ack Frame received */ +#define SCB_CMDACKCX (1 << 15) /* Ack Command complete */ + unsigned short scb_cbl_offset; /* Offset of first command unit */ + unsigned short scb_rfa_offset; /* Offset of first receive frame area */ + unsigned short scb_crc_errors; /* Properly aligned frame with CRC error*/ + unsigned short scb_aln_errors; /* Misaligned frames */ + unsigned short scb_rsc_errors; /* Frames lost due to no space */ + unsigned short scb_ovn_errors; /* Frames lost due to slow bus */ +} scb_t; + +typedef struct { /* iscp */ + unsigned short iscp_busy; /* set by CPU before CA */ + unsigned short iscp_offset; /* offset of SCB */ + unsigned short iscp_basel; /* base of SCB */ + unsigned short iscp_baseh; +} iscp_t; + + /* this address must be 0xfff6 */ +typedef struct { /* scp */ + unsigned short scp_sysbus; /* bus size */ +#define SCP_SY_16BBUS 0x00 +#define SCP_SY_8BBUS 0x01 + unsigned short scp_junk[2]; /* junk */ + unsigned short scp_iscpl; /* lower 16 bits of iscp */ + unsigned short scp_iscph; /* upper 16 bits of iscp */ +} scp_t; + +/* commands */ +#define CMD_NOP 0 +#define CMD_SETADDRESS 1 +#define CMD_CONFIG 2 +#define CMD_SETMULTICAST 3 +#define CMD_TX 4 +#define CMD_TDR 5 +#define CMD_DUMP 6 +#define CMD_DIAGNOSE 7 + +#define CMD_MASK 7 + +#define CMD_INTR (1 << 13) +#define CMD_SUSP (1 << 14) +#define CMD_EOL (1 << 15) + +#define STAT_COLLISIONS (15) +#define STAT_COLLEXCESSIVE (1 << 5) +#define STAT_COLLAFTERTX (1 << 6) +#define STAT_TXDEFERRED (1 << 7) +#define STAT_TXSLOWDMA (1 << 8) +#define STAT_TXLOSTCTS (1 << 9) +#define STAT_NOCARRIER (1 << 10) +#define STAT_FAIL (1 << 11) +#define STAT_ABORTED (1 << 12) +#define STAT_OK (1 << 13) +#define STAT_BUSY (1 << 14) +#define STAT_COMPLETE (1 << 15) +#endif +#endif + +/* + * Ether1 card definitions: + * + * FAST accesses: + * +0 Page register + * 16 pages + * +4 Control + * '1' = reset + * '2' = loopback + * '4' = CA + * '8' = int ack + * + * RAM at address + 0x2000 + * Pod. Prod id = 3 + * Words after ID block [base + 8 words] + * +0 pcb issue (0x0c and 0xf3 invalid) + * +1 - +6 eth hw address + */ diff --git a/drivers/net/ethernet/i825xx/lasi_82596.c b/drivers/net/ethernet/i825xx/lasi_82596.c new file mode 100644 index 0000000000..3e53e0c243 --- /dev/null +++ b/drivers/net/ethernet/i825xx/lasi_82596.c @@ -0,0 +1,239 @@ +// SPDX-License-Identifier: GPL-1.0+ +/* lasi_82596.c -- driver for the intel 82596 ethernet controller, as + munged into HPPA boxen . + + This driver is based upon 82596.c, original credits are below... + but there were too many hoops which HP wants jumped through to + keep this code in there in a sane manner. + + 3 primary sources of the mess -- + 1) hppa needs *lots* of cacheline flushing to keep this kind of + MMIO running. + + 2) The 82596 needs to see all of its pointers as their physical + address. Thus virt_to_bus/bus_to_virt are *everywhere*. + + 3) The implementation HP is using seems to be significantly pickier + about when and how the command and RX units are started. some + command ordering was changed. + + Examination of the mach driver leads one to believe that there + might be a saner way to pull this off... anyone who feels like a + full rewrite can be my guest. + + Split 02/13/2000 Sam Creasey (sammy@oh.verio.com) + + 02/01/2000 Initial modifications for parisc by Helge Deller (deller@gmx.de) + 03/02/2000 changes for better/correct(?) cache-flushing (deller) +*/ + +/* 82596.c: A generic 82596 ethernet driver for linux. */ +/* + Based on Apricot.c + Written 1994 by Mark Evans. + This driver is for the Apricot 82596 bus-master interface + + Modularised 12/94 Mark Evans + + + Modified to support the 82596 ethernet chips on 680x0 VME boards. + by Richard Hirst <richard@sleepie.demon.co.uk> + Renamed to be 82596.c + + 980825: Changed to receive directly in to sk_buffs which are + allocated at open() time. Eliminates copy on incoming frames + (small ones are still copied). Shared data now held in a + non-cached page, so we can run on 68060 in copyback mode. + + TBD: + * look at deferring rx frames rather than discarding (as per tulip) + * handle tx ring full as per tulip + * performance test to tune rx_copybreak + + Most of my modifications relate to the braindead big-endian + implementation by Intel. When the i596 is operating in + 'big-endian' mode, it thinks a 32 bit value of 0x12345678 + should be stored as 0x56781234. This is a real pain, when + you have linked lists which are shared by the 680x0 and the + i596. + + Driver skeleton + Written 1993 by Donald Becker. + Copyright 1993 United States Government as represented by the Director, + National Security Agency. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 + + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/ptrace.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/types.h> +#include <linux/bitops.h> +#include <linux/dma-mapping.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/pdc.h> +#include <asm/parisc-device.h> + +#define LASI_82596_DRIVER_VERSION "LASI 82596 driver - Revision: 1.30" + +#define PA_I82596_RESET 0 /* Offsets relative to LASI-LAN-Addr.*/ +#define PA_CPU_PORT_L_ACCESS 4 +#define PA_CHANNEL_ATTENTION 8 + +#define OPT_SWAP_PORT 0x0001 /* Need to wordswp on the MPU port */ + +#define SYSBUS 0x0000006c + +/* big endian CPU, 82596 "big" endian mode */ +#define SWAP32(x) (((u32)(x)<<16) | ((((u32)(x)))>>16)) +#define SWAP16(x) (x) + +#define NONCOHERENT_DMA 1 + +#include "lib82596.c" + +MODULE_AUTHOR("Richard Hirst"); +MODULE_DESCRIPTION("i82596 driver"); +MODULE_LICENSE("GPL"); +module_param(i596_debug, int, 0); +MODULE_PARM_DESC(i596_debug, "lasi_82596 debug mask"); + +static inline void ca(struct net_device *dev) +{ + gsc_writel(0, dev->base_addr + PA_CHANNEL_ATTENTION); +} + + +static void mpu_port(struct net_device *dev, int c, dma_addr_t x) +{ + struct i596_private *lp = netdev_priv(dev); + + u32 v = (u32) (c) | (u32) (x); + u16 a, b; + + if (lp->options & OPT_SWAP_PORT) { + a = v >> 16; + b = v & 0xffff; + } else { + a = v & 0xffff; + b = v >> 16; + } + + gsc_writel(a, dev->base_addr + PA_CPU_PORT_L_ACCESS); + if (!running_on_qemu) + udelay(1); + gsc_writel(b, dev->base_addr + PA_CPU_PORT_L_ACCESS); +} + +#define LAN_PROM_ADDR 0xF0810000 + +static int __init +lan_init_chip(struct parisc_device *dev) +{ + struct net_device *netdevice; + struct i596_private *lp; + int retval = -ENOMEM; + u8 addr[ETH_ALEN]; + int i; + + if (!dev->irq) { + printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n", + __FILE__, (unsigned long)dev->hpa.start); + return -ENODEV; + } + + printk(KERN_INFO "Found i82596 at 0x%lx, IRQ %d\n", + (unsigned long)dev->hpa.start, dev->irq); + + netdevice = alloc_etherdev(sizeof(struct i596_private)); + if (!netdevice) + return -ENOMEM; + SET_NETDEV_DEV(netdevice, &dev->dev); + parisc_set_drvdata (dev, netdevice); + + netdevice->base_addr = dev->hpa.start; + netdevice->irq = dev->irq; + + if (pdc_lan_station_id(addr, netdevice->base_addr)) { + for (i = 0; i < 6; i++) { + addr[i] = gsc_readb(LAN_PROM_ADDR + i); + } + printk(KERN_INFO + "%s: MAC of HP700 LAN read from EEPROM\n", __FILE__); + } + eth_hw_addr_set(netdevice, addr); + + lp = netdev_priv(netdevice); + lp->options = dev->id.sversion == 0x72 ? OPT_SWAP_PORT : 0; + lp->dma = dma_alloc_noncoherent(&dev->dev, + sizeof(struct i596_dma), &lp->dma_addr, + DMA_BIDIRECTIONAL, GFP_KERNEL); + if (!lp->dma) + goto out_free_netdev; + + retval = i82596_probe(netdevice); + if (retval) + goto out_free_dma; + return 0; + +out_free_dma: + dma_free_noncoherent(&dev->dev, sizeof(struct i596_dma), + lp->dma, lp->dma_addr, DMA_BIDIRECTIONAL); +out_free_netdev: + free_netdev(netdevice); + return retval; +} + +static void __exit lan_remove_chip(struct parisc_device *pdev) +{ + struct net_device *dev = parisc_get_drvdata(pdev); + struct i596_private *lp = netdev_priv(dev); + + unregister_netdev (dev); + dma_free_noncoherent(&pdev->dev, sizeof(struct i596_private), lp->dma, + lp->dma_addr, DMA_BIDIRECTIONAL); + free_netdev (dev); +} + +static const struct parisc_device_id lan_tbl[] __initconst = { + { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008a }, + { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00072 }, + { 0, } +}; + +MODULE_DEVICE_TABLE(parisc, lan_tbl); + +static struct parisc_driver lan_driver __refdata = { + .name = "lasi_82596", + .id_table = lan_tbl, + .probe = lan_init_chip, + .remove = __exit_p(lan_remove_chip), +}; + +static int lasi_82596_init(void) +{ + printk(KERN_INFO LASI_82596_DRIVER_VERSION "\n"); + return register_parisc_driver(&lan_driver); +} + +module_init(lasi_82596_init); + +static void __exit lasi_82596_exit(void) +{ + unregister_parisc_driver(&lan_driver); +} + +module_exit(lasi_82596_exit); diff --git a/drivers/net/ethernet/i825xx/lib82596.c b/drivers/net/ethernet/i825xx/lib82596.c new file mode 100644 index 0000000000..67d248a7a6 --- /dev/null +++ b/drivers/net/ethernet/i825xx/lib82596.c @@ -0,0 +1,1423 @@ +// SPDX-License-Identifier: GPL-1.0+ +/* lasi_82596.c -- driver for the intel 82596 ethernet controller, as + munged into HPPA boxen . + + This driver is based upon 82596.c, original credits are below... + but there were too many hoops which HP wants jumped through to + keep this code in there in a sane manner. + + 3 primary sources of the mess -- + 1) hppa needs *lots* of cacheline flushing to keep this kind of + MMIO running. + + 2) The 82596 needs to see all of its pointers as their physical + address. Thus virt_to_bus/bus_to_virt are *everywhere*. + + 3) The implementation HP is using seems to be significantly pickier + about when and how the command and RX units are started. some + command ordering was changed. + + Examination of the mach driver leads one to believe that there + might be a saner way to pull this off... anyone who feels like a + full rewrite can be my guest. + + Split 02/13/2000 Sam Creasey (sammy@oh.verio.com) + + 02/01/2000 Initial modifications for parisc by Helge Deller (deller@gmx.de) + 03/02/2000 changes for better/correct(?) cache-flushing (deller) +*/ + +/* 82596.c: A generic 82596 ethernet driver for linux. */ +/* + Based on Apricot.c + Written 1994 by Mark Evans. + This driver is for the Apricot 82596 bus-master interface + + Modularised 12/94 Mark Evans + + + Modified to support the 82596 ethernet chips on 680x0 VME boards. + by Richard Hirst <richard@sleepie.demon.co.uk> + Renamed to be 82596.c + + 980825: Changed to receive directly in to sk_buffs which are + allocated at open() time. Eliminates copy on incoming frames + (small ones are still copied). Shared data now held in a + non-cached page, so we can run on 68060 in copyback mode. + + TBD: + * look at deferring rx frames rather than discarding (as per tulip) + * handle tx ring full as per tulip + * performance test to tune rx_copybreak + + Most of my modifications relate to the braindead big-endian + implementation by Intel. When the i596 is operating in + 'big-endian' mode, it thinks a 32 bit value of 0x12345678 + should be stored as 0x56781234. This is a real pain, when + you have linked lists which are shared by the 680x0 and the + i596. + + Driver skeleton + Written 1993 by Donald Becker. + Copyright 1993 United States Government as represented by the Director, + National Security Agency. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 + + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/types.h> +#include <linux/bitops.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/gfp.h> + +/* DEBUG flags + */ + +#define DEB_INIT 0x0001 +#define DEB_PROBE 0x0002 +#define DEB_SERIOUS 0x0004 +#define DEB_ERRORS 0x0008 +#define DEB_MULTI 0x0010 +#define DEB_TDR 0x0020 +#define DEB_OPEN 0x0040 +#define DEB_RESET 0x0080 +#define DEB_ADDCMD 0x0100 +#define DEB_STATUS 0x0200 +#define DEB_STARTTX 0x0400 +#define DEB_RXADDR 0x0800 +#define DEB_TXADDR 0x1000 +#define DEB_RXFRAME 0x2000 +#define DEB_INTS 0x4000 +#define DEB_STRUCT 0x8000 +#define DEB_ANY 0xffff + + +#define DEB(x, y) if (i596_debug & (x)) { y; } + + +/* + * The MPU_PORT command allows direct access to the 82596. With PORT access + * the following commands are available (p5-18). The 32-bit port command + * must be word-swapped with the most significant word written first. + * This only applies to VME boards. + */ +#define PORT_RESET 0x00 /* reset 82596 */ +#define PORT_SELFTEST 0x01 /* selftest */ +#define PORT_ALTSCP 0x02 /* alternate SCB address */ +#define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ + +static int i596_debug = (DEB_SERIOUS|DEB_PROBE); + +/* Copy frames shorter than rx_copybreak, otherwise pass on up in + * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha). + */ +static int rx_copybreak = 100; + +#define PKT_BUF_SZ 1536 +#define MAX_MC_CNT 64 + +#define ISCP_BUSY 0x0001 + +#define I596_NULL ((u32)0xffffffff) + +#define CMD_EOL 0x8000 /* The last command of the list, stop. */ +#define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ +#define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ + +#define CMD_FLEX 0x0008 /* Enable flexible memory model */ + +enum commands { + CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, + CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 +}; + +#define STAT_C 0x8000 /* Set to 0 after execution */ +#define STAT_B 0x4000 /* Command being executed */ +#define STAT_OK 0x2000 /* Command executed ok */ +#define STAT_A 0x1000 /* Command aborted */ + +#define CUC_START 0x0100 +#define CUC_RESUME 0x0200 +#define CUC_SUSPEND 0x0300 +#define CUC_ABORT 0x0400 +#define RX_START 0x0010 +#define RX_RESUME 0x0020 +#define RX_SUSPEND 0x0030 +#define RX_ABORT 0x0040 + +#define TX_TIMEOUT (HZ/20) + + +struct i596_reg { + unsigned short porthi; + unsigned short portlo; + u32 ca; +}; + +#define EOF 0x8000 +#define SIZE_MASK 0x3fff + +struct i596_tbd { + unsigned short size; + unsigned short pad; + u32 next; + u32 data; + u32 cache_pad[5]; /* Total 32 bytes... */ +}; + +/* The command structure has two 'next' pointers; v_next is the address of + * the next command as seen by the CPU, b_next is the address of the next + * command as seen by the 82596. The b_next pointer, as used by the 82596 + * always references the status field of the next command, rather than the + * v_next field, because the 82596 is unaware of v_next. It may seem more + * logical to put v_next at the end of the structure, but we cannot do that + * because the 82596 expects other fields to be there, depending on command + * type. + */ + +struct i596_cmd { + struct i596_cmd *v_next; /* Address from CPUs viewpoint */ + unsigned short status; + unsigned short command; + u32 b_next; /* Address from i596 viewpoint */ +}; + +struct tx_cmd { + struct i596_cmd cmd; + u32 tbd; + unsigned short size; + unsigned short pad; + struct sk_buff *skb; /* So we can free it after tx */ + dma_addr_t dma_addr; +#ifdef __LP64__ + u32 cache_pad[6]; /* Total 64 bytes... */ +#else + u32 cache_pad[1]; /* Total 32 bytes... */ +#endif +}; + +struct tdr_cmd { + struct i596_cmd cmd; + unsigned short status; + unsigned short pad; +}; + +struct mc_cmd { + struct i596_cmd cmd; + short mc_cnt; + char mc_addrs[MAX_MC_CNT*6]; +}; + +struct sa_cmd { + struct i596_cmd cmd; + char eth_addr[8]; +}; + +struct cf_cmd { + struct i596_cmd cmd; + char i596_config[16]; +}; + +struct i596_rfd { + unsigned short stat; + unsigned short cmd; + u32 b_next; /* Address from i596 viewpoint */ + u32 rbd; + unsigned short count; + unsigned short size; + struct i596_rfd *v_next; /* Address from CPUs viewpoint */ + struct i596_rfd *v_prev; +#ifndef __LP64__ + u32 cache_pad[2]; /* Total 32 bytes... */ +#endif +}; + +struct i596_rbd { + /* hardware data */ + unsigned short count; + unsigned short zero1; + u32 b_next; + u32 b_data; /* Address from i596 viewpoint */ + unsigned short size; + unsigned short zero2; + /* driver data */ + struct sk_buff *skb; + struct i596_rbd *v_next; + u32 b_addr; /* This rbd addr from i596 view */ + unsigned char *v_data; /* Address from CPUs viewpoint */ + /* Total 32 bytes... */ +#ifdef __LP64__ + u32 cache_pad[4]; +#endif +}; + +/* These values as chosen so struct i596_dma fits in one page... */ + +#define TX_RING_SIZE 32 +#define RX_RING_SIZE 16 + +struct i596_scb { + unsigned short status; + unsigned short command; + u32 cmd; + u32 rfd; + u32 crc_err; + u32 align_err; + u32 resource_err; + u32 over_err; + u32 rcvdt_err; + u32 short_err; + unsigned short t_on; + unsigned short t_off; +}; + +struct i596_iscp { + u32 stat; + u32 scb; +}; + +struct i596_scp { + u32 sysbus; + u32 pad; + u32 iscp; +}; + +struct i596_dma { + struct i596_scp scp __attribute__((aligned(32))); + volatile struct i596_iscp iscp __attribute__((aligned(32))); + volatile struct i596_scb scb __attribute__((aligned(32))); + struct sa_cmd sa_cmd __attribute__((aligned(32))); + struct cf_cmd cf_cmd __attribute__((aligned(32))); + struct tdr_cmd tdr_cmd __attribute__((aligned(32))); + struct mc_cmd mc_cmd __attribute__((aligned(32))); + struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32))); + struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32))); + struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32))); + struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32))); +}; + +struct i596_private { + struct i596_dma *dma; + u32 stat; + int last_restart; + struct i596_rfd *rfd_head; + struct i596_rbd *rbd_head; + struct i596_cmd *cmd_tail; + struct i596_cmd *cmd_head; + int cmd_backlog; + u32 last_cmd; + int next_tx_cmd; + int options; + spinlock_t lock; /* serialize access to chip */ + dma_addr_t dma_addr; + void __iomem *mpu_port; + void __iomem *ca; +}; + +static const char init_setup[] = +{ + 0x8E, /* length, prefetch on */ + 0xC8, /* fifo to 8, monitor off */ + 0x80, /* don't save bad frames */ + 0x2E, /* No source address insertion, 8 byte preamble */ + 0x00, /* priority and backoff defaults */ + 0x60, /* interframe spacing */ + 0x00, /* slot time LSB */ + 0xf2, /* slot time and retries */ + 0x00, /* promiscuous mode */ + 0x00, /* collision detect */ + 0x40, /* minimum frame length */ + 0xff, + 0x00, + 0x7f /* *multi IA */ }; + +static int i596_open(struct net_device *dev); +static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t i596_interrupt(int irq, void *dev_id); +static int i596_close(struct net_device *dev); +static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); +static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue); +static void print_eth(unsigned char *buf, char *str); +static void set_multicast_list(struct net_device *dev); +static inline void ca(struct net_device *dev); +static void mpu_port(struct net_device *dev, int c, dma_addr_t x); + +static int rx_ring_size = RX_RING_SIZE; +static int ticks_limit = 100; +static int max_cmd_backlog = TX_RING_SIZE-1; + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void i596_poll_controller(struct net_device *dev); +#endif + +static inline dma_addr_t virt_to_dma(struct i596_private *lp, volatile void *v) +{ + return lp->dma_addr + ((unsigned long)v - (unsigned long)lp->dma); +} + +#ifdef NONCOHERENT_DMA +static inline void dma_sync_dev(struct net_device *ndev, volatile void *addr, + size_t len) +{ + dma_sync_single_for_device(ndev->dev.parent, + virt_to_dma(netdev_priv(ndev), addr), len, + DMA_BIDIRECTIONAL); +} + +static inline void dma_sync_cpu(struct net_device *ndev, volatile void *addr, + size_t len) +{ + dma_sync_single_for_cpu(ndev->dev.parent, + virt_to_dma(netdev_priv(ndev), addr), len, + DMA_BIDIRECTIONAL); +} +#else +static inline void dma_sync_dev(struct net_device *ndev, volatile void *addr, + size_t len) +{ +} +static inline void dma_sync_cpu(struct net_device *ndev, volatile void *addr, + size_t len) +{ +} +#endif /* NONCOHERENT_DMA */ + +static inline int wait_istat(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) +{ + dma_sync_cpu(dev, &(dma->iscp), sizeof(struct i596_iscp)); + while (--delcnt && dma->iscp.stat) { + udelay(10); + dma_sync_cpu(dev, &(dma->iscp), sizeof(struct i596_iscp)); + } + if (!delcnt) { + printk(KERN_ERR "%s: %s, iscp.stat %04x, didn't clear\n", + dev->name, str, SWAP16(dma->iscp.stat)); + return -1; + } else + return 0; +} + + +static inline int wait_cmd(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) +{ + dma_sync_cpu(dev, &(dma->scb), sizeof(struct i596_scb)); + while (--delcnt && dma->scb.command) { + udelay(10); + dma_sync_cpu(dev, &(dma->scb), sizeof(struct i596_scb)); + } + if (!delcnt) { + printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", + dev->name, str, + SWAP16(dma->scb.status), + SWAP16(dma->scb.command)); + return -1; + } else + return 0; +} + + +static void i596_display_data(struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + struct i596_dma *dma = lp->dma; + struct i596_cmd *cmd; + struct i596_rfd *rfd; + struct i596_rbd *rbd; + + printk(KERN_DEBUG "lp and scp at %p, .sysbus = %08x, .iscp = %08x\n", + &dma->scp, dma->scp.sysbus, SWAP32(dma->scp.iscp)); + printk(KERN_DEBUG "iscp at %p, iscp.stat = %08x, .scb = %08x\n", + &dma->iscp, SWAP32(dma->iscp.stat), SWAP32(dma->iscp.scb)); + printk(KERN_DEBUG "scb at %p, scb.status = %04x, .command = %04x," + " .cmd = %08x, .rfd = %08x\n", + &dma->scb, SWAP16(dma->scb.status), SWAP16(dma->scb.command), + SWAP16(dma->scb.cmd), SWAP32(dma->scb.rfd)); + printk(KERN_DEBUG " errors: crc %x, align %x, resource %x," + " over %x, rcvdt %x, short %x\n", + SWAP32(dma->scb.crc_err), SWAP32(dma->scb.align_err), + SWAP32(dma->scb.resource_err), SWAP32(dma->scb.over_err), + SWAP32(dma->scb.rcvdt_err), SWAP32(dma->scb.short_err)); + cmd = lp->cmd_head; + while (cmd != NULL) { + printk(KERN_DEBUG + "cmd at %p, .status = %04x, .command = %04x," + " .b_next = %08x\n", + cmd, SWAP16(cmd->status), SWAP16(cmd->command), + SWAP32(cmd->b_next)); + cmd = cmd->v_next; + } + rfd = lp->rfd_head; + printk(KERN_DEBUG "rfd_head = %p\n", rfd); + do { + printk(KERN_DEBUG + " %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x," + " count %04x\n", + rfd, SWAP16(rfd->stat), SWAP16(rfd->cmd), + SWAP32(rfd->b_next), SWAP32(rfd->rbd), + SWAP16(rfd->count)); + rfd = rfd->v_next; + } while (rfd != lp->rfd_head); + rbd = lp->rbd_head; + printk(KERN_DEBUG "rbd_head = %p\n", rbd); + do { + printk(KERN_DEBUG + " %p .count %04x, b_next %08x, b_data %08x," + " size %04x\n", + rbd, SWAP16(rbd->count), SWAP32(rbd->b_next), + SWAP32(rbd->b_data), SWAP16(rbd->size)); + rbd = rbd->v_next; + } while (rbd != lp->rbd_head); + dma_sync_cpu(dev, dma, sizeof(struct i596_dma)); +} + +static inline int init_rx_bufs(struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + struct i596_dma *dma = lp->dma; + int i; + struct i596_rfd *rfd; + struct i596_rbd *rbd; + + /* First build the Receive Buffer Descriptor List */ + + for (i = 0, rbd = dma->rbds; i < rx_ring_size; i++, rbd++) { + dma_addr_t dma_addr; + struct sk_buff *skb; + + skb = netdev_alloc_skb_ip_align(dev, PKT_BUF_SZ); + if (skb == NULL) + return -1; + dma_addr = dma_map_single(dev->dev.parent, skb->data, + PKT_BUF_SZ, DMA_FROM_DEVICE); + rbd->v_next = rbd+1; + rbd->b_next = SWAP32(virt_to_dma(lp, rbd+1)); + rbd->b_addr = SWAP32(virt_to_dma(lp, rbd)); + rbd->skb = skb; + rbd->v_data = skb->data; + rbd->b_data = SWAP32(dma_addr); + rbd->size = SWAP16(PKT_BUF_SZ); + } + lp->rbd_head = dma->rbds; + rbd = dma->rbds + rx_ring_size - 1; + rbd->v_next = dma->rbds; + rbd->b_next = SWAP32(virt_to_dma(lp, dma->rbds)); + + /* Now build the Receive Frame Descriptor List */ + + for (i = 0, rfd = dma->rfds; i < rx_ring_size; i++, rfd++) { + rfd->rbd = I596_NULL; + rfd->v_next = rfd+1; + rfd->v_prev = rfd-1; + rfd->b_next = SWAP32(virt_to_dma(lp, rfd+1)); + rfd->cmd = SWAP16(CMD_FLEX); + } + lp->rfd_head = dma->rfds; + dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); + rfd = dma->rfds; + rfd->rbd = SWAP32(virt_to_dma(lp, lp->rbd_head)); + rfd->v_prev = dma->rfds + rx_ring_size - 1; + rfd = dma->rfds + rx_ring_size - 1; + rfd->v_next = dma->rfds; + rfd->b_next = SWAP32(virt_to_dma(lp, dma->rfds)); + rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); + + dma_sync_dev(dev, dma, sizeof(struct i596_dma)); + return 0; +} + +static inline void remove_rx_bufs(struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + struct i596_rbd *rbd; + int i; + + for (i = 0, rbd = lp->dma->rbds; i < rx_ring_size; i++, rbd++) { + if (rbd->skb == NULL) + break; + dma_unmap_single(dev->dev.parent, + (dma_addr_t)SWAP32(rbd->b_data), + PKT_BUF_SZ, DMA_FROM_DEVICE); + dev_kfree_skb(rbd->skb); + } +} + + +static void rebuild_rx_bufs(struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + struct i596_dma *dma = lp->dma; + int i; + + /* Ensure rx frame/buffer descriptors are tidy */ + + for (i = 0; i < rx_ring_size; i++) { + dma->rfds[i].rbd = I596_NULL; + dma->rfds[i].cmd = SWAP16(CMD_FLEX); + } + dma->rfds[rx_ring_size-1].cmd = SWAP16(CMD_EOL|CMD_FLEX); + lp->rfd_head = dma->rfds; + dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); + lp->rbd_head = dma->rbds; + dma->rfds[0].rbd = SWAP32(virt_to_dma(lp, dma->rbds)); + + dma_sync_dev(dev, dma, sizeof(struct i596_dma)); +} + + +static int init_i596_mem(struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + struct i596_dma *dma = lp->dma; + unsigned long flags; + + mpu_port(dev, PORT_RESET, 0); + udelay(100); /* Wait 100us - seems to help */ + + /* change the scp address */ + + lp->last_cmd = jiffies; + + dma->scp.sysbus = SYSBUS; + dma->scp.iscp = SWAP32(virt_to_dma(lp, &(dma->iscp))); + dma->iscp.scb = SWAP32(virt_to_dma(lp, &(dma->scb))); + dma->iscp.stat = SWAP32(ISCP_BUSY); + lp->cmd_backlog = 0; + + lp->cmd_head = NULL; + dma->scb.cmd = I596_NULL; + + DEB(DEB_INIT, printk(KERN_DEBUG "%s: starting i82596.\n", dev->name)); + + dma_sync_dev(dev, &(dma->scp), sizeof(struct i596_scp)); + dma_sync_dev(dev, &(dma->iscp), sizeof(struct i596_iscp)); + dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); + + mpu_port(dev, PORT_ALTSCP, virt_to_dma(lp, &dma->scp)); + ca(dev); + if (wait_istat(dev, dma, 1000, "initialization timed out")) + goto failed; + DEB(DEB_INIT, printk(KERN_DEBUG + "%s: i82596 initialization successful\n", + dev->name)); + + if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) { + printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq); + goto failed; + } + + /* Ensure rx frame/buffer descriptors are tidy */ + rebuild_rx_bufs(dev); + + dma->scb.command = 0; + dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); + + DEB(DEB_INIT, printk(KERN_DEBUG + "%s: queuing CmdConfigure\n", dev->name)); + memcpy(dma->cf_cmd.i596_config, init_setup, 14); + dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); + dma_sync_dev(dev, &(dma->cf_cmd), sizeof(struct cf_cmd)); + i596_add_cmd(dev, &dma->cf_cmd.cmd); + + DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name)); + memcpy(dma->sa_cmd.eth_addr, dev->dev_addr, ETH_ALEN); + dma->sa_cmd.cmd.command = SWAP16(CmdSASetup); + dma_sync_dev(dev, &(dma->sa_cmd), sizeof(struct sa_cmd)); + i596_add_cmd(dev, &dma->sa_cmd.cmd); + + DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name)); + dma->tdr_cmd.cmd.command = SWAP16(CmdTDR); + dma_sync_dev(dev, &(dma->tdr_cmd), sizeof(struct tdr_cmd)); + i596_add_cmd(dev, &dma->tdr_cmd.cmd); + + spin_lock_irqsave (&lp->lock, flags); + + if (wait_cmd(dev, dma, 1000, "timed out waiting to issue RX_START")) { + spin_unlock_irqrestore (&lp->lock, flags); + goto failed_free_irq; + } + DEB(DEB_INIT, printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name)); + dma->scb.command = SWAP16(RX_START); + dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); + dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); + + ca(dev); + + spin_unlock_irqrestore (&lp->lock, flags); + if (wait_cmd(dev, dma, 1000, "RX_START not processed")) + goto failed_free_irq; + DEB(DEB_INIT, printk(KERN_DEBUG + "%s: Receive unit started OK\n", dev->name)); + return 0; + +failed_free_irq: + free_irq(dev->irq, dev); +failed: + printk(KERN_ERR "%s: Failed to initialise 82596\n", dev->name); + mpu_port(dev, PORT_RESET, 0); + return -1; +} + + +static inline int i596_rx(struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + struct i596_rfd *rfd; + struct i596_rbd *rbd; + int frames = 0; + + DEB(DEB_RXFRAME, printk(KERN_DEBUG + "i596_rx(), rfd_head %p, rbd_head %p\n", + lp->rfd_head, lp->rbd_head)); + + + rfd = lp->rfd_head; /* Ref next frame to check */ + + dma_sync_cpu(dev, rfd, sizeof(struct i596_rfd)); + while (rfd->stat & SWAP16(STAT_C)) { /* Loop while complete frames */ + if (rfd->rbd == I596_NULL) + rbd = NULL; + else if (rfd->rbd == lp->rbd_head->b_addr) { + rbd = lp->rbd_head; + dma_sync_cpu(dev, rbd, sizeof(struct i596_rbd)); + } else { + printk(KERN_ERR "%s: rbd chain broken!\n", dev->name); + /* XXX Now what? */ + rbd = NULL; + } + DEB(DEB_RXFRAME, printk(KERN_DEBUG + " rfd %p, rfd.rbd %08x, rfd.stat %04x\n", + rfd, rfd->rbd, rfd->stat)); + + if (rbd != NULL && (rfd->stat & SWAP16(STAT_OK))) { + /* a good frame */ + int pkt_len = SWAP16(rbd->count) & 0x3fff; + struct sk_buff *skb = rbd->skb; + int rx_in_place = 0; + + DEB(DEB_RXADDR, print_eth(rbd->v_data, "received")); + frames++; + + /* Check if the packet is long enough to just accept + * without copying to a properly sized skbuff. + */ + + if (pkt_len > rx_copybreak) { + struct sk_buff *newskb; + dma_addr_t dma_addr; + + dma_unmap_single(dev->dev.parent, + (dma_addr_t)SWAP32(rbd->b_data), + PKT_BUF_SZ, DMA_FROM_DEVICE); + /* Get fresh skbuff to replace filled one. */ + newskb = netdev_alloc_skb_ip_align(dev, + PKT_BUF_SZ); + if (newskb == NULL) { + skb = NULL; /* drop pkt */ + goto memory_squeeze; + } + + /* Pass up the skb already on the Rx ring. */ + skb_put(skb, pkt_len); + rx_in_place = 1; + rbd->skb = newskb; + dma_addr = dma_map_single(dev->dev.parent, + newskb->data, + PKT_BUF_SZ, + DMA_FROM_DEVICE); + rbd->v_data = newskb->data; + rbd->b_data = SWAP32(dma_addr); + dma_sync_dev(dev, rbd, sizeof(struct i596_rbd)); + } else { + skb = netdev_alloc_skb_ip_align(dev, pkt_len); + } +memory_squeeze: + if (skb == NULL) { + /* XXX tulip.c can defer packets here!! */ + dev->stats.rx_dropped++; + } else { + if (!rx_in_place) { + /* 16 byte align the data fields */ + dma_sync_single_for_cpu(dev->dev.parent, + (dma_addr_t)SWAP32(rbd->b_data), + PKT_BUF_SZ, DMA_FROM_DEVICE); + skb_put_data(skb, rbd->v_data, + pkt_len); + dma_sync_single_for_device(dev->dev.parent, + (dma_addr_t)SWAP32(rbd->b_data), + PKT_BUF_SZ, DMA_FROM_DEVICE); + } + skb->len = pkt_len; + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes += pkt_len; + } + } else { + DEB(DEB_ERRORS, printk(KERN_DEBUG + "%s: Error, rfd.stat = 0x%04x\n", + dev->name, rfd->stat)); + dev->stats.rx_errors++; + if (rfd->stat & SWAP16(0x0100)) + dev->stats.collisions++; + if (rfd->stat & SWAP16(0x8000)) + dev->stats.rx_length_errors++; + if (rfd->stat & SWAP16(0x0001)) + dev->stats.rx_over_errors++; + if (rfd->stat & SWAP16(0x0002)) + dev->stats.rx_fifo_errors++; + if (rfd->stat & SWAP16(0x0004)) + dev->stats.rx_frame_errors++; + if (rfd->stat & SWAP16(0x0008)) + dev->stats.rx_crc_errors++; + if (rfd->stat & SWAP16(0x0010)) + dev->stats.rx_length_errors++; + } + + /* Clear the buffer descriptor count and EOF + F flags */ + + if (rbd != NULL && (rbd->count & SWAP16(0x4000))) { + rbd->count = 0; + lp->rbd_head = rbd->v_next; + dma_sync_dev(dev, rbd, sizeof(struct i596_rbd)); + } + + /* Tidy the frame descriptor, marking it as end of list */ + + rfd->rbd = I596_NULL; + rfd->stat = 0; + rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); + rfd->count = 0; + + /* Update record of next frame descriptor to process */ + + lp->dma->scb.rfd = rfd->b_next; + lp->rfd_head = rfd->v_next; + dma_sync_dev(dev, rfd, sizeof(struct i596_rfd)); + + /* Remove end-of-list from old end descriptor */ + + rfd->v_prev->cmd = SWAP16(CMD_FLEX); + dma_sync_dev(dev, rfd->v_prev, sizeof(struct i596_rfd)); + rfd = lp->rfd_head; + dma_sync_cpu(dev, rfd, sizeof(struct i596_rfd)); + } + + DEB(DEB_RXFRAME, printk(KERN_DEBUG "frames %d\n", frames)); + + return 0; +} + + +static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) +{ + struct i596_cmd *ptr; + + while (lp->cmd_head != NULL) { + ptr = lp->cmd_head; + lp->cmd_head = ptr->v_next; + lp->cmd_backlog--; + + switch (SWAP16(ptr->command) & 0x7) { + case CmdTx: + { + struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; + struct sk_buff *skb = tx_cmd->skb; + dma_unmap_single(dev->dev.parent, + tx_cmd->dma_addr, + skb->len, DMA_TO_DEVICE); + + dev_kfree_skb(skb); + + dev->stats.tx_errors++; + dev->stats.tx_aborted_errors++; + + ptr->v_next = NULL; + ptr->b_next = I596_NULL; + tx_cmd->cmd.command = 0; /* Mark as free */ + break; + } + default: + ptr->v_next = NULL; + ptr->b_next = I596_NULL; + } + dma_sync_dev(dev, ptr, sizeof(struct i596_cmd)); + } + + wait_cmd(dev, lp->dma, 100, "i596_cleanup_cmd timed out"); + lp->dma->scb.cmd = I596_NULL; + dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb)); +} + + +static inline void i596_reset(struct net_device *dev, struct i596_private *lp) +{ + unsigned long flags; + + DEB(DEB_RESET, printk(KERN_DEBUG "i596_reset\n")); + + spin_lock_irqsave (&lp->lock, flags); + + wait_cmd(dev, lp->dma, 100, "i596_reset timed out"); + + netif_stop_queue(dev); + + /* FIXME: this command might cause an lpmc */ + lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); + dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb)); + ca(dev); + + /* wait for shutdown */ + wait_cmd(dev, lp->dma, 1000, "i596_reset 2 timed out"); + spin_unlock_irqrestore (&lp->lock, flags); + + i596_cleanup_cmd(dev, lp); + i596_rx(dev); + + netif_start_queue(dev); + init_i596_mem(dev); +} + + +static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) +{ + struct i596_private *lp = netdev_priv(dev); + struct i596_dma *dma = lp->dma; + unsigned long flags; + + DEB(DEB_ADDCMD, printk(KERN_DEBUG "i596_add_cmd cmd_head %p\n", + lp->cmd_head)); + + cmd->status = 0; + cmd->command |= SWAP16(CMD_EOL | CMD_INTR); + cmd->v_next = NULL; + cmd->b_next = I596_NULL; + dma_sync_dev(dev, cmd, sizeof(struct i596_cmd)); + + spin_lock_irqsave (&lp->lock, flags); + + if (lp->cmd_head != NULL) { + lp->cmd_tail->v_next = cmd; + lp->cmd_tail->b_next = SWAP32(virt_to_dma(lp, &cmd->status)); + dma_sync_dev(dev, lp->cmd_tail, sizeof(struct i596_cmd)); + } else { + lp->cmd_head = cmd; + wait_cmd(dev, dma, 100, "i596_add_cmd timed out"); + dma->scb.cmd = SWAP32(virt_to_dma(lp, &cmd->status)); + dma->scb.command = SWAP16(CUC_START); + dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); + ca(dev); + } + lp->cmd_tail = cmd; + lp->cmd_backlog++; + + spin_unlock_irqrestore (&lp->lock, flags); + + if (lp->cmd_backlog > max_cmd_backlog) { + unsigned long tickssofar = jiffies - lp->last_cmd; + + if (tickssofar < ticks_limit) + return; + + printk(KERN_ERR + "%s: command unit timed out, status resetting.\n", + dev->name); +#if 1 + i596_reset(dev, lp); +#endif + } +} + +static int i596_open(struct net_device *dev) +{ + DEB(DEB_OPEN, printk(KERN_DEBUG + "%s: i596_open() irq %d.\n", dev->name, dev->irq)); + + if (init_rx_bufs(dev)) { + printk(KERN_ERR "%s: Failed to init rx bufs\n", dev->name); + return -EAGAIN; + } + if (init_i596_mem(dev)) { + printk(KERN_ERR "%s: Failed to init memory\n", dev->name); + goto out_remove_rx_bufs; + } + netif_start_queue(dev); + + return 0; + +out_remove_rx_bufs: + remove_rx_bufs(dev); + return -EAGAIN; +} + +static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue) +{ + struct i596_private *lp = netdev_priv(dev); + + /* Transmitter timeout, serious problems. */ + DEB(DEB_ERRORS, printk(KERN_DEBUG + "%s: transmit timed out, status resetting.\n", + dev->name)); + + dev->stats.tx_errors++; + + /* Try to restart the adaptor */ + if (lp->last_restart == dev->stats.tx_packets) { + DEB(DEB_ERRORS, printk(KERN_DEBUG "Resetting board.\n")); + /* Shutdown and restart */ + i596_reset (dev, lp); + } else { + /* Issue a channel attention signal */ + DEB(DEB_ERRORS, printk(KERN_DEBUG "Kicking board.\n")); + lp->dma->scb.command = SWAP16(CUC_START | RX_START); + dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb)); + ca (dev); + lp->last_restart = dev->stats.tx_packets; + } + + netif_trans_update(dev); /* prevent tx timeout */ + netif_wake_queue (dev); +} + + +static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + struct tx_cmd *tx_cmd; + struct i596_tbd *tbd; + short length = skb->len; + + DEB(DEB_STARTTX, printk(KERN_DEBUG + "%s: i596_start_xmit(%x,%p) called\n", + dev->name, skb->len, skb->data)); + + if (length < ETH_ZLEN) { + if (skb_padto(skb, ETH_ZLEN)) + return NETDEV_TX_OK; + length = ETH_ZLEN; + } + + netif_stop_queue(dev); + + tx_cmd = lp->dma->tx_cmds + lp->next_tx_cmd; + tbd = lp->dma->tbds + lp->next_tx_cmd; + + if (tx_cmd->cmd.command) { + DEB(DEB_ERRORS, printk(KERN_DEBUG + "%s: xmit ring full, dropping packet.\n", + dev->name)); + dev->stats.tx_dropped++; + + dev_kfree_skb_any(skb); + } else { + if (++lp->next_tx_cmd == TX_RING_SIZE) + lp->next_tx_cmd = 0; + tx_cmd->tbd = SWAP32(virt_to_dma(lp, tbd)); + tbd->next = I596_NULL; + + tx_cmd->cmd.command = SWAP16(CMD_FLEX | CmdTx); + tx_cmd->skb = skb; + + tx_cmd->pad = 0; + tx_cmd->size = 0; + tbd->pad = 0; + tbd->size = SWAP16(EOF | length); + + tx_cmd->dma_addr = dma_map_single(dev->dev.parent, skb->data, + skb->len, DMA_TO_DEVICE); + tbd->data = SWAP32(tx_cmd->dma_addr); + + DEB(DEB_TXADDR, print_eth(skb->data, "tx-queued")); + dma_sync_dev(dev, tx_cmd, sizeof(struct tx_cmd)); + dma_sync_dev(dev, tbd, sizeof(struct i596_tbd)); + i596_add_cmd(dev, &tx_cmd->cmd); + + dev->stats.tx_packets++; + dev->stats.tx_bytes += length; + } + + netif_start_queue(dev); + + return NETDEV_TX_OK; +} + +static void print_eth(unsigned char *add, char *str) +{ + printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n", + add, add + 6, add, add[12], add[13], str); +} +static const struct net_device_ops i596_netdev_ops = { + .ndo_open = i596_open, + .ndo_stop = i596_close, + .ndo_start_xmit = i596_start_xmit, + .ndo_set_rx_mode = set_multicast_list, + .ndo_tx_timeout = i596_tx_timeout, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = i596_poll_controller, +#endif +}; + +static int i82596_probe(struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + int ret; + + /* This lot is ensure things have been cache line aligned. */ + BUILD_BUG_ON(sizeof(struct i596_rfd) != 32); + BUILD_BUG_ON(sizeof(struct i596_rbd) & 31); + BUILD_BUG_ON(sizeof(struct tx_cmd) & 31); + BUILD_BUG_ON(sizeof(struct i596_tbd) != 32); +#ifndef __LP64__ + BUILD_BUG_ON(sizeof(struct i596_dma) > 4096); +#endif + + if (!dev->base_addr || !dev->irq) + return -ENODEV; + + dev->netdev_ops = &i596_netdev_ops; + dev->watchdog_timeo = TX_TIMEOUT; + + memset(lp->dma, 0, sizeof(struct i596_dma)); + lp->dma->scb.command = 0; + lp->dma->scb.cmd = I596_NULL; + lp->dma->scb.rfd = I596_NULL; + spin_lock_init(&lp->lock); + + dma_sync_dev(dev, lp->dma, sizeof(struct i596_dma)); + + ret = register_netdev(dev); + if (ret) + return ret; + + DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx, %pM IRQ %d.\n", + dev->name, dev->base_addr, dev->dev_addr, + dev->irq)); + DEB(DEB_INIT, printk(KERN_INFO + "%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n", + dev->name, lp->dma, (int)sizeof(struct i596_dma), + &lp->dma->scb)); + + return 0; +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void i596_poll_controller(struct net_device *dev) +{ + disable_irq(dev->irq); + i596_interrupt(dev->irq, dev); + enable_irq(dev->irq); +} +#endif + +static irqreturn_t i596_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct i596_private *lp; + struct i596_dma *dma; + unsigned short status, ack_cmd = 0; + + lp = netdev_priv(dev); + dma = lp->dma; + + spin_lock (&lp->lock); + + wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); + status = SWAP16(dma->scb.status); + + DEB(DEB_INTS, printk(KERN_DEBUG + "%s: i596 interrupt, IRQ %d, status %4.4x.\n", + dev->name, dev->irq, status)); + + ack_cmd = status & 0xf000; + + if (!ack_cmd) { + DEB(DEB_ERRORS, printk(KERN_DEBUG + "%s: interrupt with no events\n", + dev->name)); + spin_unlock (&lp->lock); + return IRQ_NONE; + } + + if ((status & 0x8000) || (status & 0x2000)) { + struct i596_cmd *ptr; + + if ((status & 0x8000)) + DEB(DEB_INTS, + printk(KERN_DEBUG + "%s: i596 interrupt completed command.\n", + dev->name)); + if ((status & 0x2000)) + DEB(DEB_INTS, + printk(KERN_DEBUG + "%s: i596 interrupt command unit inactive %x.\n", + dev->name, status & 0x0700)); + + while (lp->cmd_head != NULL) { + dma_sync_cpu(dev, lp->cmd_head, sizeof(struct i596_cmd)); + if (!(lp->cmd_head->status & SWAP16(STAT_C))) + break; + + ptr = lp->cmd_head; + + DEB(DEB_STATUS, + printk(KERN_DEBUG + "cmd_head->status = %04x, ->command = %04x\n", + SWAP16(lp->cmd_head->status), + SWAP16(lp->cmd_head->command))); + lp->cmd_head = ptr->v_next; + lp->cmd_backlog--; + + switch (SWAP16(ptr->command) & 0x7) { + case CmdTx: + { + struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; + struct sk_buff *skb = tx_cmd->skb; + + if (ptr->status & SWAP16(STAT_OK)) { + DEB(DEB_TXADDR, + print_eth(skb->data, "tx-done")); + } else { + dev->stats.tx_errors++; + if (ptr->status & SWAP16(0x0020)) + dev->stats.collisions++; + if (!(ptr->status & SWAP16(0x0040))) + dev->stats.tx_heartbeat_errors++; + if (ptr->status & SWAP16(0x0400)) + dev->stats.tx_carrier_errors++; + if (ptr->status & SWAP16(0x0800)) + dev->stats.collisions++; + if (ptr->status & SWAP16(0x1000)) + dev->stats.tx_aborted_errors++; + } + dma_unmap_single(dev->dev.parent, + tx_cmd->dma_addr, + skb->len, DMA_TO_DEVICE); + dev_consume_skb_irq(skb); + + tx_cmd->cmd.command = 0; /* Mark free */ + break; + } + case CmdTDR: + { + unsigned short status = SWAP16(((struct tdr_cmd *)ptr)->status); + + if (status & 0x8000) { + DEB(DEB_ANY, + printk(KERN_DEBUG "%s: link ok.\n", + dev->name)); + } else { + if (status & 0x4000) + printk(KERN_ERR + "%s: Transceiver problem.\n", + dev->name); + if (status & 0x2000) + printk(KERN_ERR + "%s: Termination problem.\n", + dev->name); + if (status & 0x1000) + printk(KERN_ERR + "%s: Short circuit.\n", + dev->name); + + DEB(DEB_TDR, + printk(KERN_DEBUG "%s: Time %d.\n", + dev->name, status & 0x07ff)); + } + break; + } + case CmdConfigure: + /* + * Zap command so set_multicast_list() know + * it is free + */ + ptr->command = 0; + break; + } + ptr->v_next = NULL; + ptr->b_next = I596_NULL; + dma_sync_dev(dev, ptr, sizeof(struct i596_cmd)); + lp->last_cmd = jiffies; + } + + /* This mess is arranging that only the last of any outstanding + * commands has the interrupt bit set. Should probably really + * only add to the cmd queue when the CU is stopped. + */ + ptr = lp->cmd_head; + while ((ptr != NULL) && (ptr != lp->cmd_tail)) { + struct i596_cmd *prev = ptr; + + ptr->command &= SWAP16(0x1fff); + ptr = ptr->v_next; + dma_sync_dev(dev, prev, sizeof(struct i596_cmd)); + } + + if (lp->cmd_head != NULL) + ack_cmd |= CUC_START; + dma->scb.cmd = SWAP32(virt_to_dma(lp, &lp->cmd_head->status)); + dma_sync_dev(dev, &dma->scb, sizeof(struct i596_scb)); + } + if ((status & 0x1000) || (status & 0x4000)) { + if ((status & 0x4000)) + DEB(DEB_INTS, + printk(KERN_DEBUG + "%s: i596 interrupt received a frame.\n", + dev->name)); + i596_rx(dev); + /* Only RX_START if stopped - RGH 07-07-96 */ + if (status & 0x1000) { + if (netif_running(dev)) { + DEB(DEB_ERRORS, + printk(KERN_DEBUG + "%s: i596 interrupt receive unit inactive, status 0x%x\n", + dev->name, status)); + ack_cmd |= RX_START; + dev->stats.rx_errors++; + dev->stats.rx_fifo_errors++; + rebuild_rx_bufs(dev); + } + } + } + wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); + dma->scb.command = SWAP16(ack_cmd); + dma_sync_dev(dev, &dma->scb, sizeof(struct i596_scb)); + + /* DANGER: I suspect that some kind of interrupt + acknowledgement aside from acking the 82596 might be needed + here... but it's running acceptably without */ + + ca(dev); + + wait_cmd(dev, dma, 100, "i596 interrupt, exit timeout"); + DEB(DEB_INTS, printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); + + spin_unlock (&lp->lock); + return IRQ_HANDLED; +} + +static int i596_close(struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + unsigned long flags; + + netif_stop_queue(dev); + + DEB(DEB_INIT, + printk(KERN_DEBUG + "%s: Shutting down ethercard, status was %4.4x.\n", + dev->name, SWAP16(lp->dma->scb.status))); + + spin_lock_irqsave(&lp->lock, flags); + + wait_cmd(dev, lp->dma, 100, "close1 timed out"); + lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); + dma_sync_dev(dev, &lp->dma->scb, sizeof(struct i596_scb)); + + ca(dev); + + wait_cmd(dev, lp->dma, 100, "close2 timed out"); + spin_unlock_irqrestore(&lp->lock, flags); + DEB(DEB_STRUCT, i596_display_data(dev)); + i596_cleanup_cmd(dev, lp); + + free_irq(dev->irq, dev); + remove_rx_bufs(dev); + + return 0; +} + +/* + * Set or clear the multicast filter for this adaptor. + */ + +static void set_multicast_list(struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + struct i596_dma *dma = lp->dma; + int config = 0, cnt; + + DEB(DEB_MULTI, + printk(KERN_DEBUG + "%s: set multicast list, %d entries, promisc %s, allmulti %s\n", + dev->name, netdev_mc_count(dev), + dev->flags & IFF_PROMISC ? "ON" : "OFF", + dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); + + if ((dev->flags & IFF_PROMISC) && + !(dma->cf_cmd.i596_config[8] & 0x01)) { + dma->cf_cmd.i596_config[8] |= 0x01; + config = 1; + } + if (!(dev->flags & IFF_PROMISC) && + (dma->cf_cmd.i596_config[8] & 0x01)) { + dma->cf_cmd.i596_config[8] &= ~0x01; + config = 1; + } + if ((dev->flags & IFF_ALLMULTI) && + (dma->cf_cmd.i596_config[11] & 0x20)) { + dma->cf_cmd.i596_config[11] &= ~0x20; + config = 1; + } + if (!(dev->flags & IFF_ALLMULTI) && + !(dma->cf_cmd.i596_config[11] & 0x20)) { + dma->cf_cmd.i596_config[11] |= 0x20; + config = 1; + } + if (config) { + if (dma->cf_cmd.cmd.command) + printk(KERN_INFO + "%s: config change request already queued\n", + dev->name); + else { + dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); + dma_sync_dev(dev, &dma->cf_cmd, sizeof(struct cf_cmd)); + i596_add_cmd(dev, &dma->cf_cmd.cmd); + } + } + + cnt = netdev_mc_count(dev); + if (cnt > MAX_MC_CNT) { + cnt = MAX_MC_CNT; + printk(KERN_NOTICE "%s: Only %d multicast addresses supported", + dev->name, cnt); + } + + if (!netdev_mc_empty(dev)) { + struct netdev_hw_addr *ha; + unsigned char *cp; + struct mc_cmd *cmd; + + cmd = &dma->mc_cmd; + cmd->cmd.command = SWAP16(CmdMulticastList); + cmd->mc_cnt = SWAP16(netdev_mc_count(dev) * 6); + cp = cmd->mc_addrs; + netdev_for_each_mc_addr(ha, dev) { + if (!cnt--) + break; + memcpy(cp, ha->addr, ETH_ALEN); + if (i596_debug > 1) + DEB(DEB_MULTI, + printk(KERN_DEBUG + "%s: Adding address %pM\n", + dev->name, cp)); + cp += ETH_ALEN; + } + dma_sync_dev(dev, &dma->mc_cmd, sizeof(struct mc_cmd)); + i596_add_cmd(dev, &cmd->cmd); + } +} diff --git a/drivers/net/ethernet/i825xx/sni_82596.c b/drivers/net/ethernet/i825xx/sni_82596.c new file mode 100644 index 0000000000..54bb4d9a0d --- /dev/null +++ b/drivers/net/ethernet/i825xx/sni_82596.c @@ -0,0 +1,191 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * sni_82596.c -- driver for intel 82596 ethernet controller, as + * used in older SNI RM machines + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/types.h> +#include <linux/bitops.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/irq.h> + +#define SNI_82596_DRIVER_VERSION "SNI RM 82596 driver - Revision: 0.01" + +static const char sni_82596_string[] = "snirm_82596"; + +#define SYSBUS 0x00004400 + +/* big endian CPU, 82596 little endian */ +#define SWAP32(x) cpu_to_le32((u32)(x)) +#define SWAP16(x) cpu_to_le16((u16)(x)) + +#define OPT_MPU_16BIT 0x01 + +#include "lib82596.c" + +MODULE_AUTHOR("Thomas Bogendoerfer"); +MODULE_DESCRIPTION("i82596 driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:snirm_82596"); +module_param(i596_debug, int, 0); +MODULE_PARM_DESC(i596_debug, "82596 debug mask"); + +static inline void ca(struct net_device *dev) +{ + struct i596_private *lp = netdev_priv(dev); + + writel(0, lp->ca); +} + + +static void mpu_port(struct net_device *dev, int c, dma_addr_t x) +{ + struct i596_private *lp = netdev_priv(dev); + + u32 v = (u32) (c) | (u32) (x); + + if (lp->options & OPT_MPU_16BIT) { + writew(v & 0xffff, lp->mpu_port); + wmb(); /* order writes to MPU port */ + udelay(1); + writew(v >> 16, lp->mpu_port); + } else { + writel(v, lp->mpu_port); + wmb(); /* order writes to MPU port */ + udelay(1); + writel(v, lp->mpu_port); + } +} + + +static int sni_82596_probe(struct platform_device *dev) +{ + struct net_device *netdevice; + struct i596_private *lp; + struct resource *res, *ca, *idprom, *options; + int retval = -ENOMEM; + void __iomem *mpu_addr; + void __iomem *ca_addr; + u8 __iomem *eth_addr; + u8 mac[ETH_ALEN]; + + res = platform_get_resource(dev, IORESOURCE_MEM, 0); + ca = platform_get_resource(dev, IORESOURCE_MEM, 1); + options = platform_get_resource(dev, 0, 0); + idprom = platform_get_resource(dev, IORESOURCE_MEM, 2); + if (!res || !ca || !options || !idprom) + return -ENODEV; + mpu_addr = ioremap(res->start, 4); + if (!mpu_addr) + return -ENOMEM; + ca_addr = ioremap(ca->start, 4); + if (!ca_addr) + goto probe_failed_free_mpu; + + printk(KERN_INFO "Found i82596 at 0x%x\n", res->start); + + netdevice = alloc_etherdev(sizeof(struct i596_private)); + if (!netdevice) + goto probe_failed_free_ca; + + SET_NETDEV_DEV(netdevice, &dev->dev); + platform_set_drvdata (dev, netdevice); + + netdevice->base_addr = res->start; + netdevice->irq = platform_get_irq(dev, 0); + + eth_addr = ioremap(idprom->start, 0x10); + if (!eth_addr) + goto probe_failed; + + /* someone seems to like messed up stuff */ + mac[0] = readb(eth_addr + 0x0b); + mac[1] = readb(eth_addr + 0x0a); + mac[2] = readb(eth_addr + 0x09); + mac[3] = readb(eth_addr + 0x08); + mac[4] = readb(eth_addr + 0x07); + mac[5] = readb(eth_addr + 0x06); + eth_hw_addr_set(netdevice, mac); + iounmap(eth_addr); + + if (netdevice->irq < 0) { + printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n", + __FILE__, netdevice->base_addr); + retval = netdevice->irq; + goto probe_failed; + } + + lp = netdev_priv(netdevice); + lp->options = options->flags & IORESOURCE_BITS; + lp->ca = ca_addr; + lp->mpu_port = mpu_addr; + + lp->dma = dma_alloc_coherent(&dev->dev, sizeof(struct i596_dma), + &lp->dma_addr, GFP_KERNEL); + if (!lp->dma) + goto probe_failed; + + retval = i82596_probe(netdevice); + if (retval) + goto probe_failed_free_dma; + return 0; + +probe_failed_free_dma: + dma_free_coherent(&dev->dev, sizeof(struct i596_dma), lp->dma, + lp->dma_addr); +probe_failed: + free_netdev(netdevice); +probe_failed_free_ca: + iounmap(ca_addr); +probe_failed_free_mpu: + iounmap(mpu_addr); + return retval; +} + +static int sni_82596_driver_remove(struct platform_device *pdev) +{ + struct net_device *dev = platform_get_drvdata(pdev); + struct i596_private *lp = netdev_priv(dev); + + unregister_netdev(dev); + dma_free_coherent(&pdev->dev, sizeof(struct i596_private), lp->dma, + lp->dma_addr); + iounmap(lp->ca); + iounmap(lp->mpu_port); + free_netdev (dev); + return 0; +} + +static struct platform_driver sni_82596_driver = { + .probe = sni_82596_probe, + .remove = sni_82596_driver_remove, + .driver = { + .name = sni_82596_string, + }, +}; + +static int sni_82596_init(void) +{ + printk(KERN_INFO SNI_82596_DRIVER_VERSION "\n"); + return platform_driver_register(&sni_82596_driver); +} + + +static void __exit sni_82596_exit(void) +{ + platform_driver_unregister(&sni_82596_driver); +} + +module_init(sni_82596_init); +module_exit(sni_82596_exit); diff --git a/drivers/net/ethernet/i825xx/sun3_82586.c b/drivers/net/ethernet/i825xx/sun3_82586.c new file mode 100644 index 0000000000..5e27470c6b --- /dev/null +++ b/drivers/net/ethernet/i825xx/sun3_82586.c @@ -0,0 +1,1186 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Sun3 i82586 Ethernet driver + * + * Cloned from ni52.c for the Sun3 by Sam Creasey (sammy@sammy.net) + * + * Original copyright follows: + * -------------------------- + * + * net-3-driver for the NI5210 card (i82586 Ethernet chip) + * + * This is an extension to the Linux operating system, and is covered by the + * same Gnu Public License that covers that work. + * + * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later) + * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de) + * -------------------------- + * + * Consult ni52.c for further notes from the original driver. + * + * This incarnation currently supports the OBIO version of the i82586 chip + * used in certain sun3 models. It should be fairly doable to expand this + * to support VME if I should every acquire such a board. + * + */ + +static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */ +static int automatic_resume = 0; /* experimental .. better should be zero */ +static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */ +static int fifo=0x8; /* don't change */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/bitops.h> +#include <asm/io.h> +#include <asm/idprom.h> +#include <asm/machines.h> +#include <asm/sun3mmu.h> +#include <asm/dvma.h> +#include <asm/byteorder.h> + +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> + +#include "sun3_82586.h" + +#define DRV_NAME "sun3_82586" + +#define DEBUG /* debug on */ +#define SYSBUSVAL 0 /* 16 Bit */ +#define SUN3_82586_TOTAL_SIZE PAGE_SIZE + +#define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;} +#define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;} +#define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;} +#define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;} +#define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);} + +#define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) ) +#define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base)) +#define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop ))) + +/******************* how to calculate the buffers ***************************** + + * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works + * --------------- in a different (more stable?) mode. Only in this mode it's + * possible to configure the driver with 'NO_NOPCOMMANDS' + +sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8; +sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT +sizeof(rfd) = 24; sizeof(rbd) = 12; +sizeof(tbd) = 8; sizeof(transmit_cmd) = 16; +sizeof(nop_cmd) = 8; + + * if you don't know the driver, better do not change these values: */ + +#define RECV_BUFF_SIZE 1536 /* slightly oversized */ +#define XMIT_BUFF_SIZE 1536 /* slightly oversized */ +#define NUM_XMIT_BUFFS 1 /* config for 32K shmem */ +#define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */ +#define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */ +#define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */ +#define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */ + +/**************************************************************************/ + +/* different DELAYs */ +#define DELAY(x) mdelay(32 * x); +#define DELAY_16(); { udelay(16); } +#define DELAY_18(); { udelay(4); } + +/* wait for command with timeout: */ +#define WAIT_4_SCB_CMD() \ +{ int i; \ + for(i=0;i<16384;i++) { \ + if(!p->scb->cmd_cuc) break; \ + DELAY_18(); \ + if(i == 16383) { \ + printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \ + if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } } + +#define WAIT_4_SCB_CMD_RUC() { int i; \ + for(i=0;i<16384;i++) { \ + if(!p->scb->cmd_ruc) break; \ + DELAY_18(); \ + if(i == 16383) { \ + printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \ + if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } } + +#define WAIT_4_STAT_COMPL(addr) { int i; \ + for(i=0;i<32767;i++) { \ + if(swab16((addr)->cmd_status) & STAT_COMPL) break; \ + DELAY_16(); DELAY_16(); } } + +static int sun3_82586_probe1(struct net_device *dev,int ioaddr); +static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id); +static int sun3_82586_open(struct net_device *dev); +static int sun3_82586_close(struct net_device *dev); +static netdev_tx_t sun3_82586_send_packet(struct sk_buff *, + struct net_device *); +static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev); +static void set_multicast_list(struct net_device *dev); +static void sun3_82586_timeout(struct net_device *dev, unsigned int txqueue); +#if 0 +static void sun3_82586_dump(struct net_device *,void *); +#endif + +/* helper-functions */ +static int init586(struct net_device *dev); +static int check586(struct net_device *dev,char *where,unsigned size); +static void alloc586(struct net_device *dev); +static void startrecv586(struct net_device *dev); +static void *alloc_rfa(struct net_device *dev,void *ptr); +static void sun3_82586_rcv_int(struct net_device *dev); +static void sun3_82586_xmt_int(struct net_device *dev); +static void sun3_82586_rnr_int(struct net_device *dev); + +struct priv +{ + unsigned long base; + char *memtop; + long int lock; + int reseted; + volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first; + volatile struct scp_struct *scp; /* volatile is important */ + volatile struct iscp_struct *iscp; /* volatile is important */ + volatile struct scb_struct *scb; /* volatile is important */ + volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS]; + volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS]; +#if (NUM_XMIT_BUFFS == 1) + volatile struct nop_cmd_struct *nop_cmds[2]; +#else + volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS]; +#endif + volatile int nop_point,num_recv_buffs; + volatile char *xmit_cbuffs[NUM_XMIT_BUFFS]; + volatile int xmit_count,xmit_last; +}; + +/********************************************** + * close device + */ +static int sun3_82586_close(struct net_device *dev) +{ + free_irq(dev->irq, dev); + + sun3_reset586(); /* the hard way to stop the receiver */ + + netif_stop_queue(dev); + + return 0; +} + +/********************************************** + * open device + */ +static int sun3_82586_open(struct net_device *dev) +{ + int ret; + + sun3_disint(); + alloc586(dev); + init586(dev); + startrecv586(dev); + sun3_enaint(); + + ret = request_irq(dev->irq, sun3_82586_interrupt,0,dev->name,dev); + if (ret) + { + sun3_reset586(); + return ret; + } + + netif_start_queue(dev); + + return 0; /* most done by init */ +} + +/********************************************** + * Check to see if there's an 82586 out there. + */ +static int check586(struct net_device *dev,char *where,unsigned size) +{ + struct priv pb; + struct priv *p = &pb; + char *iscp_addr; + int i; + + p->base = (unsigned long) dvma_btov(0); + p->memtop = (char *)dvma_btov((unsigned long)where); + p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS); + memset((char *)p->scp,0, sizeof(struct scp_struct)); + for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */ + if(((char *)p->scp)[i]) + return 0; + p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */ + if(p->scp->sysbus != SYSBUSVAL) + return 0; + + iscp_addr = (char *)dvma_btov((unsigned long)where); + + p->iscp = (struct iscp_struct *) iscp_addr; + memset((char *)p->iscp,0, sizeof(struct iscp_struct)); + + p->scp->iscp = make24(p->iscp); + p->iscp->busy = 1; + + sun3_reset586(); + sun3_attn586(); + DELAY(1); /* wait a while... */ + + if(p->iscp->busy) /* i82586 clears 'busy' after successful init */ + return 0; + + return 1; +} + +/****************************************************************** + * set iscp at the right place, called by sun3_82586_probe1 and open586. + */ +static void alloc586(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + + sun3_reset586(); + DELAY(1); + + p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS); + p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start); + p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct)); + + memset((char *) p->iscp,0,sizeof(struct iscp_struct)); + memset((char *) p->scp ,0,sizeof(struct scp_struct)); + + p->scp->iscp = make24(p->iscp); + p->scp->sysbus = SYSBUSVAL; + p->iscp->scb_offset = make16(p->scb); + p->iscp->scb_base = make24(dvma_btov(dev->mem_start)); + + p->iscp->busy = 1; + sun3_reset586(); + sun3_attn586(); + + DELAY(1); + + if(p->iscp->busy) + printk("%s: Init-Problems (alloc).\n",dev->name); + + p->reseted = 0; + + memset((char *)p->scb,0,sizeof(struct scb_struct)); +} + +static int __init sun3_82586_probe(void) +{ + struct net_device *dev; + unsigned long ioaddr; + static int found = 0; + int err = -ENOMEM; + + /* check that this machine has an onboard 82586 */ + switch(idprom->id_machtype) { + case SM_SUN3|SM_3_160: + case SM_SUN3|SM_3_260: + /* these machines have 82586 */ + break; + + default: + return -ENODEV; + } + + if (found) + return -ENODEV; + + ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE); + if (!ioaddr) + return -ENOMEM; + found = 1; + + dev = alloc_etherdev(sizeof(struct priv)); + if (!dev) + goto out; + dev->irq = IE_IRQ; + dev->base_addr = ioaddr; + err = sun3_82586_probe1(dev, ioaddr); + if (err) + goto out1; + err = register_netdev(dev); + if (err) + goto out2; + return 0; + +out2: + release_region(ioaddr, SUN3_82586_TOTAL_SIZE); +out1: + free_netdev(dev); +out: + iounmap((void __iomem *)ioaddr); + return err; +} +module_init(sun3_82586_probe); + +static const struct net_device_ops sun3_82586_netdev_ops = { + .ndo_open = sun3_82586_open, + .ndo_stop = sun3_82586_close, + .ndo_start_xmit = sun3_82586_send_packet, + .ndo_set_rx_mode = set_multicast_list, + .ndo_tx_timeout = sun3_82586_timeout, + .ndo_get_stats = sun3_82586_get_stats, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, +}; + +static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr) +{ + int size, retval; + + if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME)) + return -EBUSY; + + /* copy in the ethernet address from the prom */ + eth_hw_addr_set(dev, idprom->id_ethaddr); + + printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr); + + /* + * check (or search) IO-Memory, 32K + */ + size = 0x8000; + + dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000); + dev->mem_end = dev->mem_start + size; + + if(size != 0x2000 && size != 0x4000 && size != 0x8000) { + printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size); + retval = -ENODEV; + goto out; + } + if(!check586(dev,(char *) dev->mem_start,size)) { + printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size); + retval = -ENODEV; + goto out; + } + + ((struct priv *)netdev_priv(dev))->memtop = + (char *)dvma_btov(dev->mem_start); + ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0); + alloc586(dev); + + /* set number of receive-buffs according to memsize */ + if(size == 0x2000) + ((struct priv *)netdev_priv(dev))->num_recv_buffs = + NUM_RECV_BUFFS_8; + else if(size == 0x4000) + ((struct priv *)netdev_priv(dev))->num_recv_buffs = + NUM_RECV_BUFFS_16; + else + ((struct priv *)netdev_priv(dev))->num_recv_buffs = + NUM_RECV_BUFFS_32; + + printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq); + + dev->netdev_ops = &sun3_82586_netdev_ops; + dev->watchdog_timeo = HZ/20; + + dev->if_port = 0; + return 0; +out: + release_region(ioaddr, SUN3_82586_TOTAL_SIZE); + return retval; +} + + +static int init586(struct net_device *dev) +{ + void *ptr; + int i,result=0; + struct priv *p = netdev_priv(dev); + volatile struct configure_cmd_struct *cfg_cmd; + volatile struct iasetup_cmd_struct *ias_cmd; + volatile struct tdr_cmd_struct *tdr_cmd; + volatile struct mcsetup_cmd_struct *mc_cmd; + struct netdev_hw_addr *ha; + int num_addrs=netdev_mc_count(dev); + + ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct)); + + cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */ + cfg_cmd->cmd_status = 0; + cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST); + cfg_cmd->cmd_link = 0xffff; + + cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */ + cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */ + cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */ + cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */ + cfg_cmd->priority = 0x00; + cfg_cmd->ifs = 0x60; + cfg_cmd->time_low = 0x00; + cfg_cmd->time_high = 0xf2; + cfg_cmd->promisc = 0; + if(dev->flags & IFF_ALLMULTI) { + int len = ((char *) p->iscp - (char *) ptr - 8) / 6; + if(num_addrs > len) { + printk("%s: switching to promisc. mode\n",dev->name); + cfg_cmd->promisc = 1; + } + } + if(dev->flags&IFF_PROMISC) + cfg_cmd->promisc = 1; + cfg_cmd->carr_coll = 0x00; + + p->scb->cbl_offset = make16(cfg_cmd); + p->scb->cmd_ruc = 0; + + p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */ + sun3_attn586(); + + WAIT_4_STAT_COMPL(cfg_cmd); + + if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK)) + { + printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status)); + return 1; + } + + /* + * individual address setup + */ + + ias_cmd = (struct iasetup_cmd_struct *)ptr; + + ias_cmd->cmd_status = 0; + ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST); + ias_cmd->cmd_link = 0xffff; + + memcpy((char *)&ias_cmd->iaddr,(const char *) dev->dev_addr,ETH_ALEN); + + p->scb->cbl_offset = make16(ias_cmd); + + p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */ + sun3_attn586(); + + WAIT_4_STAT_COMPL(ias_cmd); + + if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) { + printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status)); + return 1; + } + + /* + * TDR, wire check .. e.g. no resistor e.t.c + */ + + tdr_cmd = (struct tdr_cmd_struct *)ptr; + + tdr_cmd->cmd_status = 0; + tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST); + tdr_cmd->cmd_link = 0xffff; + tdr_cmd->status = 0; + + p->scb->cbl_offset = make16(tdr_cmd); + p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */ + sun3_attn586(); + + WAIT_4_STAT_COMPL(tdr_cmd); + + if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL)) + { + printk("%s: Problems while running the TDR.\n",dev->name); + } + else + { + DELAY_16(); /* wait for result */ + result = swab16(tdr_cmd->status); + + p->scb->cmd_cuc = p->scb->cus & STAT_MASK; + sun3_attn586(); /* ack the interrupts */ + + if(result & TDR_LNK_OK) + ; + else if(result & TDR_XCVR_PRB) + printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name); + else if(result & TDR_ET_OPN) + printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK); + else if(result & TDR_ET_SRT) + { + if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */ + printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK); + } + else + printk("%s: TDR: Unknown status %04x\n",dev->name,result); + } + + /* + * Multicast setup + */ + if(num_addrs && !(dev->flags & IFF_PROMISC) ) + { + mc_cmd = (struct mcsetup_cmd_struct *) ptr; + mc_cmd->cmd_status = 0; + mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST); + mc_cmd->cmd_link = 0xffff; + mc_cmd->mc_cnt = swab16(num_addrs * 6); + + i = 0; + netdev_for_each_mc_addr(ha, dev) + memcpy((char *) mc_cmd->mc_list[i++], + ha->addr, ETH_ALEN); + + p->scb->cbl_offset = make16(mc_cmd); + p->scb->cmd_cuc = CUC_START; + sun3_attn586(); + + WAIT_4_STAT_COMPL(mc_cmd); + + if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) ) + printk("%s: Can't apply multicast-address-list.\n",dev->name); + } + + /* + * alloc nop/xmit-cmds + */ +#if (NUM_XMIT_BUFFS == 1) + for(i=0;i<2;i++) + { + p->nop_cmds[i] = (struct nop_cmd_struct *)ptr; + p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP); + p->nop_cmds[i]->cmd_status = 0; + p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); + ptr = (char *) ptr + sizeof(struct nop_cmd_struct); + } +#else + for(i=0;i<NUM_XMIT_BUFFS;i++) + { + p->nop_cmds[i] = (struct nop_cmd_struct *)ptr; + p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP); + p->nop_cmds[i]->cmd_status = 0; + p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); + ptr = (char *) ptr + sizeof(struct nop_cmd_struct); + } +#endif + + ptr = alloc_rfa(dev,ptr); /* init receive-frame-area */ + + /* + * alloc xmit-buffs / init xmit_cmds + */ + for(i=0;i<NUM_XMIT_BUFFS;i++) + { + p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/ + ptr = (char *) ptr + sizeof(struct transmit_cmd_struct); + p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */ + ptr = (char *) ptr + XMIT_BUFF_SIZE; + p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */ + ptr = (char *) ptr + sizeof(struct tbd_struct); + if(ptr > (void *)dev->mem_end) + { + printk("%s: not enough shared-mem for your configuration!\n",dev->name); + return 1; + } + memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct)); + memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct)); + p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]); + p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL); + p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT); + p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i])); + p->xmit_buffs[i]->next = 0xffff; + p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i])); + } + + p->xmit_count = 0; + p->xmit_last = 0; +#ifndef NO_NOPCOMMANDS + p->nop_point = 0; +#endif + + /* + * 'start transmitter' + */ +#ifndef NO_NOPCOMMANDS + p->scb->cbl_offset = make16(p->nop_cmds[0]); + p->scb->cmd_cuc = CUC_START; + sun3_attn586(); + WAIT_4_SCB_CMD(); +#else + p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]); + p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT); +#endif + + /* + * ack. interrupts + */ + p->scb->cmd_cuc = p->scb->cus & STAT_MASK; + sun3_attn586(); + DELAY_16(); + + sun3_enaint(); + sun3_active(); + + return 0; +} + +/****************************************************** + * This is a helper routine for sun3_82586_rnr_int() and init586(). + * It sets up the Receive Frame Area (RFA). + */ + +static void *alloc_rfa(struct net_device *dev,void *ptr) +{ + volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr; + volatile struct rbd_struct *rbd; + int i; + struct priv *p = netdev_priv(dev); + + memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd)); + p->rfd_first = rfd; + + for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) { + rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) ); + rfd[i].rbd_offset = 0xffff; + } + rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */ + + ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) ); + + rbd = (struct rbd_struct *) ptr; + ptr = (void *) (rbd + p->num_recv_buffs); + + /* clr descriptors */ + memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs)); + + for(i=0;i<p->num_recv_buffs;i++) + { + rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs)); + rbd[i].size = swab16(RECV_BUFF_SIZE); + rbd[i].buffer = make24(ptr); + ptr = (char *) ptr + RECV_BUFF_SIZE; + } + + p->rfd_top = p->rfd_first; + p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd); + + p->scb->rfa_offset = make16(p->rfd_first); + p->rfd_first->rbd_offset = make16(rbd); + + return ptr; +} + + +/************************************************** + * Interrupt Handler ... + */ + +static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id) +{ + struct net_device *dev = dev_id; + unsigned short stat; + int cnt=0; + struct priv *p; + + if (!dev) { + printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq); + return IRQ_NONE; + } + p = netdev_priv(dev); + + if(debuglevel > 1) + printk("I"); + + WAIT_4_SCB_CMD(); /* wait for last command */ + + while((stat=p->scb->cus & STAT_MASK)) + { + p->scb->cmd_cuc = stat; + sun3_attn586(); + + if(stat & STAT_FR) /* received a frame */ + sun3_82586_rcv_int(dev); + + if(stat & STAT_RNR) /* RU went 'not ready' */ + { + printk("(R)"); + if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */ + { + WAIT_4_SCB_CMD(); + p->scb->cmd_ruc = RUC_RESUME; + sun3_attn586(); + WAIT_4_SCB_CMD_RUC(); + } + else + { + printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus); + sun3_82586_rnr_int(dev); + } + } + + if(stat & STAT_CX) /* command with I-bit set complete */ + sun3_82586_xmt_int(dev); + +#ifndef NO_NOPCOMMANDS + if(stat & STAT_CNA) /* CU went 'not ready' */ + { + if(netif_running(dev)) + printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus); + } +#endif + + if(debuglevel > 1) + printk("%d",cnt++); + + WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */ + if(p->scb->cmd_cuc) /* timed out? */ + { + printk("%s: Acknowledge timed out.\n",dev->name); + sun3_disint(); + break; + } + } + + if(debuglevel > 1) + printk("i"); + return IRQ_HANDLED; +} + +/******************************************************* + * receive-interrupt + */ + +static void sun3_82586_rcv_int(struct net_device *dev) +{ + int status,cnt=0; + unsigned short totlen; + struct sk_buff *skb; + struct rbd_struct *rbd; + struct priv *p = netdev_priv(dev); + + if(debuglevel > 0) + printk("R"); + + for(;(status = p->rfd_top->stat_high) & RFD_COMPL;) + { + rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset); + + if(status & RFD_OK) /* frame received without error? */ + { + if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */ + { + totlen &= RBD_MASK; /* length of this frame */ + rbd->status = 0; + skb = netdev_alloc_skb(dev, totlen + 2); + if(skb != NULL) + { + skb_reserve(skb,2); + skb_put(skb,totlen); + skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen); + skb->protocol=eth_type_trans(skb,dev); + netif_rx(skb); + dev->stats.rx_packets++; + } + else + dev->stats.rx_dropped++; + } + else + { + int rstat; + /* free all RBD's until RBD_LAST is set */ + totlen = 0; + while(!((rstat=swab16(rbd->status)) & RBD_LAST)) + { + totlen += rstat & RBD_MASK; + if(!rstat) + { + printk("%s: Whoops .. no end mark in RBD list\n",dev->name); + break; + } + rbd->status = 0; + rbd = (struct rbd_struct *) make32(rbd->next); + } + totlen += rstat & RBD_MASK; + rbd->status = 0; + printk("%s: received oversized frame! length: %d\n",dev->name,totlen); + dev->stats.rx_dropped++; + } + } + else /* frame !(ok), only with 'save-bad-frames' */ + { + printk("%s: oops! rfd-error-status: %04x\n",dev->name,status); + dev->stats.rx_errors++; + } + p->rfd_top->stat_high = 0; + p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */ + p->rfd_top->rbd_offset = 0xffff; + p->rfd_last->last = 0; /* delete RFD_SUSP */ + p->rfd_last = p->rfd_top; + p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */ + p->scb->rfa_offset = make16(p->rfd_top); + + if(debuglevel > 0) + printk("%d",cnt++); + } + + if(automatic_resume) + { + WAIT_4_SCB_CMD(); + p->scb->cmd_ruc = RUC_RESUME; + sun3_attn586(); + WAIT_4_SCB_CMD_RUC(); + } + +#ifdef WAIT_4_BUSY + { + int i; + for(i=0;i<1024;i++) + { + if(p->rfd_top->status) + break; + DELAY_16(); + if(i == 1023) + printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name); + } + } +#endif + +#if 0 + if(!at_least_one) + { + int i; + volatile struct rfd_struct *rfds=p->rfd_top; + volatile struct rbd_struct *rbds; + printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least); + for(i=0;i< (p->num_recv_buffs+4);i++) + { + rbds = (struct rbd_struct *) make32(rfds->rbd_offset); + printk("%04x:%04x ",rfds->status,rbds->status); + rfds = (struct rfd_struct *) make32(rfds->next); + } + printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status); + printk("\nerrs: %04x %04x rus: %02x, cus: %02x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->rus,(int)p->scb->cus); + } + old_at_least = at_least_one; +#endif + + if(debuglevel > 0) + printk("r"); +} + +/********************************************************** + * handle 'Receiver went not ready'. + */ + +static void sun3_82586_rnr_int(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + + dev->stats.rx_errors++; + + WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */ + p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */ + sun3_attn586(); + WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */ + + alloc_rfa(dev,(char *)p->rfd_first); +/* maybe add a check here, before restarting the RU */ + startrecv586(dev); /* restart RU */ + + printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus); + +} + +/********************************************************** + * handle xmit - interrupt + */ + +static void sun3_82586_xmt_int(struct net_device *dev) +{ + int status; + struct priv *p = netdev_priv(dev); + + if(debuglevel > 0) + printk("X"); + + status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status); + if(!(status & STAT_COMPL)) + printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name); + + if(status & STAT_OK) + { + dev->stats.tx_packets++; + dev->stats.collisions += (status & TCMD_MAXCOLLMASK); + } + else + { + dev->stats.tx_errors++; + if(status & TCMD_LATECOLL) { + printk("%s: late collision detected.\n",dev->name); + dev->stats.collisions++; + } + else if(status & TCMD_NOCARRIER) { + dev->stats.tx_carrier_errors++; + printk("%s: no carrier detected.\n",dev->name); + } + else if(status & TCMD_LOSTCTS) + printk("%s: loss of CTS detected.\n",dev->name); + else if(status & TCMD_UNDERRUN) { + dev->stats.tx_fifo_errors++; + printk("%s: DMA underrun detected.\n",dev->name); + } + else if(status & TCMD_MAXCOLL) { + printk("%s: Max. collisions exceeded.\n",dev->name); + dev->stats.collisions += 16; + } + } + +#if (NUM_XMIT_BUFFS > 1) + if( (++p->xmit_last) == NUM_XMIT_BUFFS) + p->xmit_last = 0; +#endif + netif_wake_queue(dev); +} + +/*********************************************************** + * (re)start the receiver + */ + +static void startrecv586(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + + WAIT_4_SCB_CMD(); + WAIT_4_SCB_CMD_RUC(); + p->scb->rfa_offset = make16(p->rfd_first); + p->scb->cmd_ruc = RUC_START; + sun3_attn586(); /* start cmd. */ + WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */ +} + +static void sun3_82586_timeout(struct net_device *dev, unsigned int txqueue) +{ + struct priv *p = netdev_priv(dev); +#ifndef NO_NOPCOMMANDS + if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */ + { + netif_wake_queue(dev); +#ifdef DEBUG + printk("%s: strange ... timeout with CU active?!?\n",dev->name); + printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev->name,(int)swab16(p->xmit_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[1]->cmd_status),(int)p->nop_point); +#endif + p->scb->cmd_cuc = CUC_ABORT; + sun3_attn586(); + WAIT_4_SCB_CMD(); + p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]); + p->scb->cmd_cuc = CUC_START; + sun3_attn586(); + WAIT_4_SCB_CMD(); + netif_trans_update(dev); /* prevent tx timeout */ + return 0; + } +#endif + { +#ifdef DEBUG + printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus); + printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status)); + printk("%s: check, whether you set the right interrupt number!\n",dev->name); +#endif + sun3_82586_close(dev); + sun3_82586_open(dev); + } + netif_trans_update(dev); /* prevent tx timeout */ +} + +/****************************************************** + * send frame + */ + +static netdev_tx_t +sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + int len,i; +#ifndef NO_NOPCOMMANDS + int next_nop; +#endif + struct priv *p = netdev_priv(dev); + + if(skb->len > XMIT_BUFF_SIZE) + { + printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len); + return NETDEV_TX_OK; + } + + netif_stop_queue(dev); + +#if(NUM_XMIT_BUFFS > 1) + if(test_and_set_bit(0,(void *) &p->lock)) { + printk("%s: Queue was locked\n",dev->name); + return NETDEV_TX_BUSY; + } + else +#endif + { + len = skb->len; + if (len < ETH_ZLEN) { + memset((void *)p->xmit_cbuffs[p->xmit_count], 0, + ETH_ZLEN); + len = ETH_ZLEN; + } + skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len); + +#if (NUM_XMIT_BUFFS == 1) +# ifdef NO_NOPCOMMANDS + +#ifdef DEBUG + if(p->scb->cus & CU_ACTIVE) + { + printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name); + printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status)); + } +#endif + + p->xmit_buffs[0]->size = swab16(TBD_LAST | len); + for(i=0;i<16;i++) + { + p->xmit_cmds[0]->cmd_status = 0; + WAIT_4_SCB_CMD(); + if( (p->scb->cus & CU_STATUS) == CU_SUSPEND) + p->scb->cmd_cuc = CUC_RESUME; + else + { + p->scb->cbl_offset = make16(p->xmit_cmds[0]); + p->scb->cmd_cuc = CUC_START; + } + + sun3_attn586(); + if(!i) + dev_kfree_skb(skb); + WAIT_4_SCB_CMD(); + if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */ + break; + if(p->xmit_cmds[0]->cmd_status) + break; + if(i==15) + printk("%s: Can't start transmit-command.\n",dev->name); + } +# else + next_nop = (p->nop_point + 1) & 0x1; + p->xmit_buffs[0]->size = swab16(TBD_LAST | len); + + p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link + = make16((p->nop_cmds[next_nop])); + p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0; + + p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0])); + p->nop_point = next_nop; + dev_kfree_skb(skb); +# endif +#else + p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len); + if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS ) + next_nop = 0; + + p->xmit_cmds[p->xmit_count]->cmd_status = 0; + /* linkpointer of xmit-command already points to next nop cmd */ + p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop])); + p->nop_cmds[next_nop]->cmd_status = 0; + + p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count])); + p->xmit_count = next_nop; + + { + unsigned long flags; + local_irq_save(flags); + if(p->xmit_count != p->xmit_last) + netif_wake_queue(dev); + p->lock = 0; + local_irq_restore(flags); + } + dev_kfree_skb(skb); +#endif + } + return NETDEV_TX_OK; +} + +/******************************************* + * Someone wanna have the statistics + */ + +static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev) +{ + struct priv *p = netdev_priv(dev); + unsigned short crc,aln,rsc,ovrn; + + crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */ + p->scb->crc_errs = 0; + aln = swab16(p->scb->aln_errs); + p->scb->aln_errs = 0; + rsc = swab16(p->scb->rsc_errs); + p->scb->rsc_errs = 0; + ovrn = swab16(p->scb->ovrn_errs); + p->scb->ovrn_errs = 0; + + dev->stats.rx_crc_errors += crc; + dev->stats.rx_fifo_errors += ovrn; + dev->stats.rx_frame_errors += aln; + dev->stats.rx_dropped += rsc; + + return &dev->stats; +} + +/******************************************************** + * Set MC list .. + */ + +static void set_multicast_list(struct net_device *dev) +{ + netif_stop_queue(dev); + sun3_disint(); + alloc586(dev); + init586(dev); + startrecv586(dev); + sun3_enaint(); + netif_wake_queue(dev); +} + +#if 0 +/* + * DUMP .. we expect a not running CMD unit and enough space + */ +void sun3_82586_dump(struct net_device *dev,void *ptr) +{ + struct priv *p = netdev_priv(dev); + struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr; + int i; + + p->scb->cmd_cuc = CUC_ABORT; + sun3_attn586(); + WAIT_4_SCB_CMD(); + WAIT_4_SCB_CMD_RUC(); + + dump_cmd->cmd_status = 0; + dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST; + dump_cmd->dump_offset = make16((dump_cmd + 1)); + dump_cmd->cmd_link = 0xffff; + + p->scb->cbl_offset = make16(dump_cmd); + p->scb->cmd_cuc = CUC_START; + sun3_attn586(); + WAIT_4_STAT_COMPL(dump_cmd); + + if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) ) + printk("%s: Can't get dump information.\n",dev->name); + + for(i=0;i<170;i++) { + printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]); + if(i % 24 == 23) + printk("\n"); + } + printk("\n"); +} +#endif diff --git a/drivers/net/ethernet/i825xx/sun3_82586.h b/drivers/net/ethernet/i825xx/sun3_82586.h new file mode 100644 index 0000000000..d8e249d704 --- /dev/null +++ b/drivers/net/ethernet/i825xx/sun3_82586.h @@ -0,0 +1,319 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Intel i82586 Ethernet definitions + * + * This is an extension to the Linux operating system, and is covered by the + * same Gnu Public License that covers that work. + * + * copyrights (c) 1994 by Michael Hipp (hippm@informatik.uni-tuebingen.de) + * + * I have done a look in the following sources: + * crynwr-packet-driver by Russ Nelson + * Garret A. Wollman's i82586-driver for BSD + */ + +/* + * Cloned from ni52.h, copyright as above. + * + * Modified for Sun3 OBIO i82586 by Sam Creasey (sammy@sammy.net) + */ + + +/* defines for the obio chip (not vme) */ +#define IEOB_NORSET 0x80 /* don't reset the board */ +#define IEOB_ONAIR 0x40 /* put us on the air */ +#define IEOB_ATTEN 0x20 /* attention! */ +#define IEOB_IENAB 0x10 /* interrupt enable */ +#define IEOB_XXXXX 0x08 /* free bit */ +#define IEOB_XCVRL2 0x04 /* level 2 transceiver? */ +#define IEOB_BUSERR 0x02 /* bus error */ +#define IEOB_INT 0x01 /* interrupt */ + +/* where the obio one lives */ +#define IE_OBIO 0xc0000 +#define IE_IRQ 3 + +/* + * where to find the System Configuration Pointer (SCP) + */ +#define SCP_DEFAULT_ADDRESS 0xfffff4 + + +/* + * System Configuration Pointer Struct + */ + +struct scp_struct +{ + unsigned short zero_dum0; /* has to be zero */ + unsigned char sysbus; /* 0=16Bit,1=8Bit */ + unsigned char zero_dum1; /* has to be zero for 586 */ + unsigned short zero_dum2; + unsigned short zero_dum3; + char *iscp; /* pointer to the iscp-block */ +}; + + +/* + * Intermediate System Configuration Pointer (ISCP) + */ +struct iscp_struct +{ + unsigned char busy; /* 586 clears after successful init */ + unsigned char zero_dummy; /* has to be zero */ + unsigned short scb_offset; /* pointeroffset to the scb_base */ + char *scb_base; /* base-address of all 16-bit offsets */ +}; + +/* + * System Control Block (SCB) + */ +struct scb_struct +{ + unsigned char rus; + unsigned char cus; + unsigned char cmd_ruc; /* command word: RU part */ + unsigned char cmd_cuc; /* command word: CU part & ACK */ + unsigned short cbl_offset; /* pointeroffset, command block list */ + unsigned short rfa_offset; /* pointeroffset, receive frame area */ + unsigned short crc_errs; /* CRC-Error counter */ + unsigned short aln_errs; /* allignmenterror counter */ + unsigned short rsc_errs; /* Resourceerror counter */ + unsigned short ovrn_errs; /* OVerrunerror counter */ +}; + +/* + * possible command values for the command word + */ +#define RUC_MASK 0x0070 /* mask for RU commands */ +#define RUC_NOP 0x0000 /* NOP-command */ +#define RUC_START 0x0010 /* start RU */ +#define RUC_RESUME 0x0020 /* resume RU after suspend */ +#define RUC_SUSPEND 0x0030 /* suspend RU */ +#define RUC_ABORT 0x0040 /* abort receiver operation immediately */ + +#define CUC_MASK 0x07 /* mask for CU command */ +#define CUC_NOP 0x00 /* NOP-command */ +#define CUC_START 0x01 /* start execution of 1. cmd on the CBL */ +#define CUC_RESUME 0x02 /* resume after suspend */ +#define CUC_SUSPEND 0x03 /* Suspend CU */ +#define CUC_ABORT 0x04 /* abort command operation immediately */ + +#define ACK_MASK 0xf0 /* mask for ACK command */ +#define ACK_CX 0x80 /* acknowledges STAT_CX */ +#define ACK_FR 0x40 /* ack. STAT_FR */ +#define ACK_CNA 0x20 /* ack. STAT_CNA */ +#define ACK_RNR 0x10 /* ack. STAT_RNR */ + +/* + * possible status values for the status word + */ +#define STAT_MASK 0xf0 /* mask for cause of interrupt */ +#define STAT_CX 0x80 /* CU finished cmd with its I bit set */ +#define STAT_FR 0x40 /* RU finished receiving a frame */ +#define STAT_CNA 0x20 /* CU left active state */ +#define STAT_RNR 0x10 /* RU left ready state */ + +#define CU_STATUS 0x7 /* CU status, 0=idle */ +#define CU_SUSPEND 0x1 /* CU is suspended */ +#define CU_ACTIVE 0x2 /* CU is active */ + +#define RU_STATUS 0x70 /* RU status, 0=idle */ +#define RU_SUSPEND 0x10 /* RU suspended */ +#define RU_NOSPACE 0x20 /* RU no resources */ +#define RU_READY 0x40 /* RU is ready */ + +/* + * Receive Frame Descriptor (RFD) + */ +struct rfd_struct +{ + unsigned char stat_low; /* status word */ + unsigned char stat_high; /* status word */ + unsigned char rfd_sf; /* 82596 mode only */ + unsigned char last; /* Bit15,Last Frame on List / Bit14,suspend */ + unsigned short next; /* linkoffset to next RFD */ + unsigned short rbd_offset; /* pointeroffset to RBD-buffer */ + unsigned char dest[ETH_ALEN]; /* ethernet-address, destination */ + unsigned char source[ETH_ALEN]; /* ethernet-address, source */ + unsigned short length; /* 802.3 frame-length */ + unsigned short zero_dummy; /* dummy */ +}; + +#define RFD_LAST 0x80 /* last: last rfd in the list */ +#define RFD_SUSP 0x40 /* last: suspend RU after */ +#define RFD_COMPL 0x80 +#define RFD_OK 0x20 +#define RFD_BUSY 0x40 +#define RFD_ERR_LEN 0x10 /* Length error (if enabled length-checking */ +#define RFD_ERR_CRC 0x08 /* CRC error */ +#define RFD_ERR_ALGN 0x04 /* Alignment error */ +#define RFD_ERR_RNR 0x02 /* status: receiver out of resources */ +#define RFD_ERR_OVR 0x01 /* DMA Overrun! */ + +#define RFD_ERR_FTS 0x0080 /* Frame too short */ +#define RFD_ERR_NEOP 0x0040 /* No EOP flag (for bitstuffing only) */ +#define RFD_ERR_TRUN 0x0020 /* (82596 only/SF mode) indicates truncated frame */ +#define RFD_MATCHADD 0x0002 /* status: Destinationaddress !matches IA (only 82596) */ +#define RFD_COLLDET 0x0001 /* Detected collision during reception */ + +/* + * Receive Buffer Descriptor (RBD) + */ +struct rbd_struct +{ + unsigned short status; /* status word,number of used bytes in buff */ + unsigned short next; /* pointeroffset to next RBD */ + char *buffer; /* receive buffer address pointer */ + unsigned short size; /* size of this buffer */ + unsigned short zero_dummy; /* dummy */ +}; + +#define RBD_LAST 0x8000 /* last buffer */ +#define RBD_USED 0x4000 /* this buffer has data */ +#define RBD_MASK 0x3fff /* size-mask for length */ + +/* + * Statusvalues for Commands/RFD + */ +#define STAT_COMPL 0x8000 /* status: frame/command is complete */ +#define STAT_BUSY 0x4000 /* status: frame/command is busy */ +#define STAT_OK 0x2000 /* status: frame/command is ok */ + +/* + * Action-Commands + */ +#define CMD_NOP 0x0000 /* NOP */ +#define CMD_IASETUP 0x0001 /* initial address setup command */ +#define CMD_CONFIGURE 0x0002 /* configure command */ +#define CMD_MCSETUP 0x0003 /* MC setup command */ +#define CMD_XMIT 0x0004 /* transmit command */ +#define CMD_TDR 0x0005 /* time domain reflectometer (TDR) command */ +#define CMD_DUMP 0x0006 /* dump command */ +#define CMD_DIAGNOSE 0x0007 /* diagnose command */ + +/* + * Action command bits + */ +#define CMD_LAST 0x8000 /* indicates last command in the CBL */ +#define CMD_SUSPEND 0x4000 /* suspend CU after this CB */ +#define CMD_INT 0x2000 /* generate interrupt after execution */ + +/* + * NOP - command + */ +struct nop_cmd_struct +{ + unsigned short cmd_status; /* status of this command */ + unsigned short cmd_cmd; /* the command itself (+bits) */ + unsigned short cmd_link; /* offsetpointer to next command */ +}; + +/* + * IA Setup command + */ +struct iasetup_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned char iaddr[6]; +}; + +/* + * Configure command + */ +struct configure_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned char byte_cnt; /* size of the config-cmd */ + unsigned char fifo; /* fifo/recv monitor */ + unsigned char sav_bf; /* save bad frames (bit7=1)*/ + unsigned char adr_len; /* adr_len(0-2),al_loc(3),pream(4-5),loopbak(6-7)*/ + unsigned char priority; /* lin_prio(0-2),exp_prio(4-6),bof_metd(7) */ + unsigned char ifs; /* inter frame spacing */ + unsigned char time_low; /* slot time low */ + unsigned char time_high; /* slot time high(0-2) and max. retries(4-7) */ + unsigned char promisc; /* promisc-mode(0) , et al (1-7) */ + unsigned char carr_coll; /* carrier(0-3)/collision(4-7) stuff */ + unsigned char fram_len; /* minimal frame len */ + unsigned char dummy; /* dummy */ +}; + +/* + * Multicast Setup command + */ +struct mcsetup_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned short mc_cnt; /* number of bytes in the MC-List */ + unsigned char mc_list[][6]; /* pointer to 6 bytes entries */ +}; + +/* + * DUMP command + */ +struct dump_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned short dump_offset; /* pointeroffset to DUMP space */ +}; + +/* + * transmit command + */ +struct transmit_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned short tbd_offset; /* pointeroffset to TBD */ + unsigned char dest[6]; /* destination address of the frame */ + unsigned short length; /* user defined: 802.3 length / Ether type */ +}; + +#define TCMD_ERRMASK 0x0fa0 +#define TCMD_MAXCOLLMASK 0x000f +#define TCMD_MAXCOLL 0x0020 +#define TCMD_HEARTBEAT 0x0040 +#define TCMD_DEFERRED 0x0080 +#define TCMD_UNDERRUN 0x0100 +#define TCMD_LOSTCTS 0x0200 +#define TCMD_NOCARRIER 0x0400 +#define TCMD_LATECOLL 0x0800 + +struct tdr_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned short status; +}; + +#define TDR_LNK_OK 0x8000 /* No link problem identified */ +#define TDR_XCVR_PRB 0x4000 /* indicates a transceiver problem */ +#define TDR_ET_OPN 0x2000 /* open, no correct termination */ +#define TDR_ET_SRT 0x1000 /* TDR detected a short circuit */ +#define TDR_TIMEMASK 0x07ff /* mask for the time field */ + +/* + * Transmit Buffer Descriptor (TBD) + */ +struct tbd_struct +{ + unsigned short size; /* size + EOF-Flag(15) */ + unsigned short next; /* pointeroffset to next TBD */ + char *buffer; /* pointer to buffer */ +}; + +#define TBD_LAST 0x8000 /* EOF-Flag, indicates last buffer in list */ + + + + |