aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/82596.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/82596.c')
-rw-r--r--drivers/net/82596.c1618
1 files changed, 1618 insertions, 0 deletions
diff --git a/drivers/net/82596.c b/drivers/net/82596.c
new file mode 100644
index 000000000000..65f97b1dc581
--- /dev/null
+++ b/drivers/net/82596.c
@@ -0,0 +1,1618 @@
+/* 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
+ * performace 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. This software may only be used and distributed
+ according to the terms of the GNU General Public License as modified by SRC,
+ incorporated herein by reference.
+
+ 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/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.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 <asm/io.h>
+#include <asm/dma.h>
+#include <asm/pgtable.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 defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
+#define ENABLE_MVME16x_NET
+#endif
+#if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
+#define ENABLE_BVME6000_NET
+#endif
+#if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE)
+#define ENABLE_APRICOT
+#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
+#define MACH_IS_APRICOT 0
+#else
+#define WSWAPrfd(x) ((struct i596_rfd *)(x))
+#define WSWAPrbd(x) ((struct i596_rbd *)(x))
+#define WSWAPiscp(x) ((struct i596_iscp *)(x))
+#define WSWAPscb(x) ((struct i596_scb *)(x))
+#define WSWAPcmd(x) ((struct i596_cmd *)(x))
+#define WSWAPtbd(x) ((struct i596_tbd *)(x))
+#define WSWAPchar(x) ((char *)(x))
+#define ISCP_BUSY 0x0001
+#define MACH_IS_APRICOT 1
+#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 5
+
+
+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 net_device_stats stats;
+ 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 int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static int i596_close(struct net_device *dev);
+static struct net_device_stats *i596_get_stats(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);
+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
+#ifdef ENABLE_APRICOT
+ if (MACH_IS_APRICOT) {
+ outw(0, (short) (dev->base_addr) + 4);
+ }
+#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->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 pt_regs *regs)
+{
+ 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 init_rx_bufs(struct net_device *dev)
+{
+ struct i596_private *lp = dev->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 = dev_alloc_skb(PKT_BUF_SZ);
+
+ if (skb == NULL)
+ panic("82596: alloc_skb() failed");
+ skb->dev = dev;
+ 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->tail;
+ rbd->b_data = WSWAPchar(virt_to_bus(skb->tail));
+ rbd->size = PKT_BUF_SZ;
+#ifdef __mc68000__
+ cache_clear(virt_to_phys(skb->tail), 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;
+}
+
+static inline void remove_rx_bufs(struct net_device *dev)
+{
+ struct i596_private *lp = dev->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);
+ }
+}
+
+
+static void rebuild_rx_bufs(struct net_device *dev)
+{
+ struct i596_private *lp = dev->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->priv;
+#if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET)
+ short ioaddr = dev->base_addr;
+#endif
+ 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));
+
+#elif defined(ENABLE_APRICOT)
+
+ {
+ u32 scp = virt_to_bus(&lp->scp);
+
+ /* change the scp address */
+ outw(0, ioaddr);
+ outw(0, ioaddr);
+ outb(4, ioaddr + 0xf);
+ outw(scp | 2, ioaddr);
+ outw(scp >> 16, ioaddr);
+ }
+#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
+#ifdef ENABLE_APRICOT
+ if (MACH_IS_APRICOT)
+ lp->scp.sysbus = 0x00440000;
+#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));
+
+#if defined(ENABLE_APRICOT)
+ (void) inb(ioaddr + 0x10);
+ outb(4, ioaddr + 0xf);
+#endif
+ 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, 6);
+ 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->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 = dev_alloc_skb(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;
+ newskb->dev = dev;
+ rbd->v_data = newskb->tail;
+ rbd->b_data = WSWAPchar(virt_to_bus(newskb->tail));
+#ifdef __mc68000__
+ cache_clear(virt_to_phys(newskb->tail), PKT_BUF_SZ);
+#endif
+ }
+ else
+ skb = dev_alloc_skb(pkt_len + 2);
+memory_squeeze:
+ if (skb == NULL) {
+ /* XXX tulip.c can defer packets here!! */
+ printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
+ lp->stats.rx_dropped++;
+ }
+ else {
+ skb->dev = dev;
+ if (!rx_in_place) {
+ /* 16 byte align the data fields */
+ skb_reserve(skb, 2);
+ memcpy(skb_put(skb,pkt_len), 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->tail),
+ pkt_len);
+#endif
+ netif_rx(skb);
+ dev->last_rx = jiffies;
+ lp->stats.rx_packets++;
+ lp->stats.rx_bytes+=pkt_len;
+ }
+ }
+ else {
+ DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
+ dev->name, rfd->stat));
+ lp->stats.rx_errors++;
+ if ((rfd->stat) & 0x0001)
+ lp->stats.collisions++;
+ if ((rfd->stat) & 0x0080)
+ lp->stats.rx_length_errors++;
+ if ((rfd->stat) & 0x0100)
+ lp->stats.rx_over_errors++;
+ if ((rfd->stat) & 0x0200)
+ lp->stats.rx_fifo_errors++;
+ if ((rfd->stat) & 0x0400)
+ lp->stats.rx_frame_errors++;
+ if ((rfd->stat) & 0x0800)
+ lp->stats.rx_crc_errors++;
+ if ((rfd->stat) & 0x1000)
+ lp->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 inline 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);
+
+ lp->stats.tx_errors++;
+ lp->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 inline 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->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))
+ return -EAGAIN;
+ }
+#endif
+ init_rx_bufs(dev);
+
+ netif_start_queue(dev);
+
+ /* Initialize the 82596 memory */
+ if (init_i596_mem(dev)) {
+ res = -EAGAIN;
+ free_irq(dev->irq, dev);
+ }
+
+ return res;
+}
+
+static void i596_tx_timeout (struct net_device *dev)
+{
+ struct i596_private *lp = dev->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));
+
+ lp->stats.tx_errors++;
+
+ /* Try to restart the adaptor */
+ if (lp->last_restart == lp->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 = lp->stats.tx_packets;
+ }
+
+ dev->trans_start = jiffies;
+ netif_wake_queue (dev);
+}
+
+
+static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct i596_private *lp = dev->priv;
+ struct tx_cmd *tx_cmd;
+ struct i596_tbd *tbd;
+ short length = skb->len;
+ dev->trans_start = jiffies;
+
+ DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%x) called\n", dev->name,
+ skb->len, (unsigned int)skb->data));
+
+ if (skb->len < ETH_ZLEN) {
+ skb = skb_padto(skb, ETH_ZLEN);
+ if (skb == NULL)
+ return 0;
+ 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);
+ lp->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);
+
+ lp->stats.tx_packets++;
+ lp->stats.tx_bytes += length;
+ }
+
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+static void print_eth(unsigned char *add, char *str)
+{
+ int i;
+
+ printk(KERN_DEBUG "i596 0x%p, ", add);
+ for (i = 0; i < 6; i++)
+ printk(" %02X", add[i + 6]);
+ printk(" -->");
+ for (i = 0; i < 6; i++)
+ printk(" %02X", add[i]);
+ printk(" %02X%02X, %s\n", add[12], add[13], str);
+}
+
+static int io = 0x300;
+static int irq = 10;
+
+struct net_device * __init i82596_probe(int unit)
+{
+ 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);
+
+ if (unit >= 0) {
+ sprintf(dev->name, "eth%d", unit);
+ netdev_boot_setup_check(dev);
+ } else {
+ dev->base_addr = io;
+ dev->irq = irq;
+ }
+
+#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, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
+ dev->base_addr = MVME_I596_BASE;
+ dev->irq = (unsigned) MVME16x_IRQ_I596;
+ }
+#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;
+ }
+#endif
+#ifdef ENABLE_APRICOT
+ {
+ int checksum = 0;
+ int ioaddr = 0x300;
+
+ /* this is easy the ethernet interface can only be at 0x300 */
+ /* first check nothing is already registered here */
+
+ if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
+ printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
+ err = -EBUSY;
+ goto out;
+ }
+
+ for (i = 0; i < 8; i++) {
+ eth_addr[i] = inb(ioaddr + 8 + i);
+ checksum += eth_addr[i];
+ }
+
+ /* checksum is a multiple of 0x100, got this wrong first time
+ some machines have 0x100, some 0x200. The DOS driver doesn't
+ even bother with the checksum.
+ Some other boards trip the checksum.. but then appear as
+ ether address 0. Trap these - AC */
+
+ if ((checksum % 0x100) ||
+ (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
+ err = -ENODEV;
+ goto out1;
+ }
+
+ dev->base_addr = ioaddr;
+ dev->irq = 10;
+ }
+#endif
+ 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", dev->dev_addr[i] = eth_addr[i]));
+
+ 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. */
+ SET_MODULE_OWNER(dev);
+ dev->open = i596_open;
+ dev->stop = i596_close;
+ dev->hard_start_xmit = i596_start_xmit;
+ dev->get_stats = i596_get_stats;
+ dev->set_multicast_list = set_multicast_list;
+ dev->tx_timeout = i596_tx_timeout;
+ dev->watchdog_timeo = TX_TIMEOUT;
+
+ dev->priv = (void *)(dev->mem_start);
+
+ lp = dev->priv;
+ DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%d 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:
+#ifdef ENABLE_APRICOT
+ release_region(dev->base_addr, I596_TOTAL_SIZE);
+#endif
+out:
+ free_netdev(dev);
+ return ERR_PTR(err);
+}
+
+static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ 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, regs);
+ 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->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 {
+ lp->stats.tx_errors++;
+ if ((ptr->status) & 0x0020)
+ lp->stats.collisions++;
+ if (!((ptr->status) & 0x0040))
+ lp->stats.tx_heartbeat_errors++;
+ if ((ptr->status) & 0x0400)
+ lp->stats.tx_carrier_errors++;
+ if ((ptr->status) & 0x0800)
+ lp->stats.collisions++;
+ if ((ptr->status) & 0x1000)
+ lp->stats.tx_aborted_errors++;
+ }
+
+ dev_kfree_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;
+ lp->stats.rx_errors++;
+ lp->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
+#ifdef ENABLE_APRICOT
+ (void) inb(ioaddr + 0x10);
+ outb(4, ioaddr + 0xf);
+#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->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
+
+ free_irq(dev->irq, dev);
+ remove_rx_bufs(dev);
+
+ return 0;
+}
+
+static struct net_device_stats *
+ i596_get_stats(struct net_device *dev)
+{
+ struct i596_private *lp = dev->priv;
+
+ return &lp->stats;
+}
+
+/*
+ * Set or clear the multicast filter for this adaptor.
+ */
+
+static void set_multicast_list(struct net_device *dev)
+{
+ struct i596_private *lp = dev->priv;
+ int config = 0, cnt;
+
+ DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
+ dev->name, dev->mc_count,
+ 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 = dev->mc_count;
+ if (cnt > MAX_MC_CNT)
+ {
+ cnt = MAX_MC_CNT;
+ printk(KERN_ERR "%s: Only %d multicast addresses supported",
+ dev->name, cnt);
+ }
+
+ if (dev->mc_count > 0) {
+ struct dev_mc_list *dmi;
+ 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 = dev->mc_count * 6;
+ cp = cmd->mc_addrs;
+ for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
+ memcpy(cp, dmi->dmi_addr, 6);
+ if (i596_debug > 1)
+ DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
+ dev->name, cp[0],cp[1],cp[2],cp[3],cp[4],cp[5]));
+ }
+ i596_add_cmd(dev, &cmd->cmd);
+ }
+}
+
+#ifdef MODULE
+static struct net_device *dev_82596;
+
+#ifdef ENABLE_APRICOT
+module_param(irq, int, 0);
+MODULE_PARM_DESC(irq, "Apricot IRQ number");
+#endif
+
+static int debug = -1;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "i82596 debug mask");
+
+int init_module(void)
+{
+ if (debug >= 0)
+ i596_debug = debug;
+ dev_82596 = i82596_probe(-1);
+ if (IS_ERR(dev_82596))
+ return PTR_ERR(dev_82596);
+ return 0;
+}
+
+void cleanup_module(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));
+#ifdef ENABLE_APRICOT
+ /* If we don't do this, we can't re-insmod it later. */
+ release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
+#endif
+ free_netdev(dev_82596);
+}
+
+#endif /* MODULE */
+
+/*
+ * Local variables:
+ * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
+ * End:
+ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 07:16:07 +0000