| /* |
| * de620.c $Revision: 1.40 $ BETA |
| * |
| * |
| * Linux driver for the D-Link DE-620 Ethernet pocket adapter. |
| * |
| * Portions (C) Copyright 1993, 1994 by Bjorn Ekwall <bj0rn@blox.se> |
| * |
| * Based on adapter information gathered from DOS packetdriver |
| * sources from D-Link Inc: (Special thanks to Henry Ngai of D-Link.) |
| * Portions (C) Copyright D-Link SYSTEM Inc. 1991, 1992 |
| * Copyright, 1988, Russell Nelson, Crynwr Software |
| * |
| * Adapted to the sample network driver core for linux, |
| * written by: Donald Becker <becker@super.org> |
| * (Now at <becker@scyld.com>) |
| * |
| * Valuable assistance from: |
| * J. Joshua Kopper <kopper@rtsg.mot.com> |
| * Olav Kvittem <Olav.Kvittem@uninett.no> |
| * Germano Caronni <caronni@nessie.cs.id.ethz.ch> |
| * Jeremy Fitzhardinge <jeremy@suite.sw.oz.au> |
| * |
| *****************************************************************************/ |
| /* |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| *****************************************************************************/ |
| static const char version[] = |
| "de620.c: $Revision: 1.40 $, Bjorn Ekwall <bj0rn@blox.se>\n"; |
| |
| /*********************************************************************** |
| * |
| * "Tuning" section. |
| * |
| * Compile-time options: (see below for descriptions) |
| * -DDE620_IO=0x378 (lpt1) |
| * -DDE620_IRQ=7 (lpt1) |
| * -DSHUTDOWN_WHEN_LOST |
| * -DCOUNT_LOOPS |
| * -DLOWSPEED |
| * -DREAD_DELAY |
| * -DWRITE_DELAY |
| */ |
| |
| /* |
| * This driver assumes that the printer port is a "normal", |
| * dumb, uni-directional port! |
| * If your port is "fancy" in any way, please try to set it to "normal" |
| * with your BIOS setup. I have no access to machines with bi-directional |
| * ports, so I can't test such a driver :-( |
| * (Yes, I _know_ it is possible to use DE620 with bidirectional ports...) |
| * |
| * There are some clones of DE620 out there, with different names. |
| * If the current driver does not recognize a clone, try to change |
| * the following #define to: |
| * |
| * #define DE620_CLONE 1 |
| */ |
| #define DE620_CLONE 0 |
| |
| /* |
| * If the adapter has problems with high speeds, enable this #define |
| * otherwise full printerport speed will be attempted. |
| * |
| * You can tune the READ_DELAY/WRITE_DELAY below if you enable LOWSPEED |
| * |
| #define LOWSPEED |
| */ |
| |
| #ifndef READ_DELAY |
| #define READ_DELAY 100 /* adapter internal read delay in 100ns units */ |
| #endif |
| |
| #ifndef WRITE_DELAY |
| #define WRITE_DELAY 100 /* adapter internal write delay in 100ns units */ |
| #endif |
| |
| /* |
| * Enable this #define if you want the adapter to do a "ifconfig down" on |
| * itself when we have detected that something is possibly wrong with it. |
| * The default behaviour is to retry with "adapter_init()" until success. |
| * This should be used for debugging purposes only. |
| * |
| #define SHUTDOWN_WHEN_LOST |
| */ |
| |
| #ifdef LOWSPEED |
| /* |
| * Enable this #define if you want to see debugging output that show how long |
| * we have to wait before the DE-620 is ready for the next read/write/command. |
| * |
| #define COUNT_LOOPS |
| */ |
| #endif |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/fcntl.h> |
| #include <linux/string.h> |
| #include <linux/interrupt.h> |
| #include <linux/ioport.h> |
| #include <linux/in.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/inet.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| |
| #include <asm/io.h> |
| #include <asm/system.h> |
| |
| /* Constant definitions for the DE-620 registers, commands and bits */ |
| #include "de620.h" |
| |
| typedef unsigned char byte; |
| |
| /******************************************************* |
| * * |
| * Definition of D-Link DE-620 Ethernet Pocket adapter * |
| * See also "de620.h" * |
| * * |
| *******************************************************/ |
| #ifndef DE620_IO /* Compile-time configurable */ |
| #define DE620_IO 0x378 |
| #endif |
| |
| #ifndef DE620_IRQ /* Compile-time configurable */ |
| #define DE620_IRQ 7 |
| #endif |
| |
| #define DATA_PORT (dev->base_addr) |
| #define STATUS_PORT (dev->base_addr + 1) |
| #define COMMAND_PORT (dev->base_addr + 2) |
| |
| #define RUNT 60 /* Too small Ethernet packet */ |
| #define GIANT 1514 /* largest legal size packet, no fcs */ |
| |
| /* |
| * Force media with insmod: |
| * insmod de620.o bnc=1 |
| * or |
| * insmod de620.o utp=1 |
| * |
| * Force io and/or irq with insmod: |
| * insmod de620.o io=0x378 irq=7 |
| * |
| * Make a clone skip the Ethernet-address range check: |
| * insmod de620.o clone=1 |
| */ |
| static int bnc; |
| static int utp; |
| static int io = DE620_IO; |
| static int irq = DE620_IRQ; |
| static int clone = DE620_CLONE; |
| |
| static spinlock_t de620_lock; |
| |
| module_param(bnc, int, 0); |
| module_param(utp, int, 0); |
| module_param(io, int, 0); |
| module_param(irq, int, 0); |
| module_param(clone, int, 0); |
| MODULE_PARM_DESC(bnc, "DE-620 set BNC medium (0-1)"); |
| MODULE_PARM_DESC(utp, "DE-620 set UTP medium (0-1)"); |
| MODULE_PARM_DESC(io, "DE-620 I/O base address,required"); |
| MODULE_PARM_DESC(irq, "DE-620 IRQ number,required"); |
| MODULE_PARM_DESC(clone, "Check also for non-D-Link DE-620 clones (0-1)"); |
| |
| /*********************************************** |
| * * |
| * Index to functions, as function prototypes. * |
| * * |
| ***********************************************/ |
| |
| /* |
| * Routines used internally. (See also "convenience macros.. below") |
| */ |
| |
| /* Put in the device structure. */ |
| static int de620_open(struct net_device *); |
| static int de620_close(struct net_device *); |
| static void de620_set_multicast_list(struct net_device *); |
| static int de620_start_xmit(struct sk_buff *, struct net_device *); |
| |
| /* Dispatch from interrupts. */ |
| static irqreturn_t de620_interrupt(int, void *); |
| static int de620_rx_intr(struct net_device *); |
| |
| /* Initialization */ |
| static int adapter_init(struct net_device *); |
| static int read_eeprom(struct net_device *); |
| |
| |
| /* |
| * D-Link driver variables: |
| */ |
| #define SCR_DEF NIBBLEMODE |INTON | SLEEP | AUTOTX |
| #define TCR_DEF RXPB /* not used: | TXSUCINT | T16INT */ |
| #define DE620_RX_START_PAGE 12 /* 12 pages (=3k) reserved for tx */ |
| #define DEF_NIC_CMD IRQEN | ICEN | DS1 |
| |
| static volatile byte NIC_Cmd; |
| static volatile byte next_rx_page; |
| static byte first_rx_page; |
| static byte last_rx_page; |
| static byte EIPRegister; |
| |
| static struct nic { |
| byte NodeID[6]; |
| byte RAM_Size; |
| byte Model; |
| byte Media; |
| byte SCR; |
| } nic_data; |
| |
| /********************************************************** |
| * * |
| * Convenience macros/functions for D-Link DE-620 adapter * |
| * * |
| **********************************************************/ |
| #define de620_tx_buffs(dd) (inb(STATUS_PORT) & (TXBF0 | TXBF1)) |
| #define de620_flip_ds(dd) NIC_Cmd ^= DS0 | DS1; outb(NIC_Cmd, COMMAND_PORT); |
| |
| /* Check for ready-status, and return a nibble (high 4 bits) for data input */ |
| #ifdef COUNT_LOOPS |
| static int tot_cnt; |
| #endif |
| static inline byte |
| de620_ready(struct net_device *dev) |
| { |
| byte value; |
| register short int cnt = 0; |
| |
| while ((((value = inb(STATUS_PORT)) & READY) == 0) && (cnt <= 1000)) |
| ++cnt; |
| |
| #ifdef COUNT_LOOPS |
| tot_cnt += cnt; |
| #endif |
| return value & 0xf0; /* nibble */ |
| } |
| |
| static inline void |
| de620_send_command(struct net_device *dev, byte cmd) |
| { |
| de620_ready(dev); |
| if (cmd == W_DUMMY) |
| outb(NIC_Cmd, COMMAND_PORT); |
| |
| outb(cmd, DATA_PORT); |
| |
| outb(NIC_Cmd ^ CS0, COMMAND_PORT); |
| de620_ready(dev); |
| outb(NIC_Cmd, COMMAND_PORT); |
| } |
| |
| static inline void |
| de620_put_byte(struct net_device *dev, byte value) |
| { |
| /* The de620_ready() makes 7 loops, on the average, on a DX2/66 */ |
| de620_ready(dev); |
| outb(value, DATA_PORT); |
| de620_flip_ds(dev); |
| } |
| |
| static inline byte |
| de620_read_byte(struct net_device *dev) |
| { |
| byte value; |
| |
| /* The de620_ready() makes 7 loops, on the average, on a DX2/66 */ |
| value = de620_ready(dev); /* High nibble */ |
| de620_flip_ds(dev); |
| value |= de620_ready(dev) >> 4; /* Low nibble */ |
| return value; |
| } |
| |
| static inline void |
| de620_write_block(struct net_device *dev, byte *buffer, int count, int pad) |
| { |
| #ifndef LOWSPEED |
| byte uflip = NIC_Cmd ^ (DS0 | DS1); |
| byte dflip = NIC_Cmd; |
| #else /* LOWSPEED */ |
| #ifdef COUNT_LOOPS |
| int bytes = count; |
| #endif /* COUNT_LOOPS */ |
| #endif /* LOWSPEED */ |
| |
| #ifdef LOWSPEED |
| #ifdef COUNT_LOOPS |
| tot_cnt = 0; |
| #endif /* COUNT_LOOPS */ |
| /* No further optimization useful, the limit is in the adapter. */ |
| for ( ; count > 0; --count, ++buffer) { |
| de620_put_byte(dev,*buffer); |
| } |
| for ( count = pad ; count > 0; --count, ++buffer) { |
| de620_put_byte(dev, 0); |
| } |
| de620_send_command(dev,W_DUMMY); |
| #ifdef COUNT_LOOPS |
| /* trial debug output: loops per byte in de620_ready() */ |
| printk("WRITE(%d)\n", tot_cnt/((bytes?bytes:1))); |
| #endif /* COUNT_LOOPS */ |
| #else /* not LOWSPEED */ |
| for ( ; count > 0; count -=2) { |
| outb(*buffer++, DATA_PORT); |
| outb(uflip, COMMAND_PORT); |
| outb(*buffer++, DATA_PORT); |
| outb(dflip, COMMAND_PORT); |
| } |
| de620_send_command(dev,W_DUMMY); |
| #endif /* LOWSPEED */ |
| } |
| |
| static inline void |
| de620_read_block(struct net_device *dev, byte *data, int count) |
| { |
| #ifndef LOWSPEED |
| byte value; |
| byte uflip = NIC_Cmd ^ (DS0 | DS1); |
| byte dflip = NIC_Cmd; |
| #else /* LOWSPEED */ |
| #ifdef COUNT_LOOPS |
| int bytes = count; |
| |
| tot_cnt = 0; |
| #endif /* COUNT_LOOPS */ |
| #endif /* LOWSPEED */ |
| |
| #ifdef LOWSPEED |
| /* No further optimization useful, the limit is in the adapter. */ |
| while (count-- > 0) { |
| *data++ = de620_read_byte(dev); |
| de620_flip_ds(dev); |
| } |
| #ifdef COUNT_LOOPS |
| /* trial debug output: loops per byte in de620_ready() */ |
| printk("READ(%d)\n", tot_cnt/(2*(bytes?bytes:1))); |
| #endif /* COUNT_LOOPS */ |
| #else /* not LOWSPEED */ |
| while (count-- > 0) { |
| value = inb(STATUS_PORT) & 0xf0; /* High nibble */ |
| outb(uflip, COMMAND_PORT); |
| *data++ = value | inb(STATUS_PORT) >> 4; /* Low nibble */ |
| outb(dflip , COMMAND_PORT); |
| } |
| #endif /* LOWSPEED */ |
| } |
| |
| static inline void |
| de620_set_delay(struct net_device *dev) |
| { |
| de620_ready(dev); |
| outb(W_DFR, DATA_PORT); |
| outb(NIC_Cmd ^ CS0, COMMAND_PORT); |
| |
| de620_ready(dev); |
| #ifdef LOWSPEED |
| outb(WRITE_DELAY, DATA_PORT); |
| #else |
| outb(0, DATA_PORT); |
| #endif |
| de620_flip_ds(dev); |
| |
| de620_ready(dev); |
| #ifdef LOWSPEED |
| outb(READ_DELAY, DATA_PORT); |
| #else |
| outb(0, DATA_PORT); |
| #endif |
| de620_flip_ds(dev); |
| } |
| |
| static inline void |
| de620_set_register(struct net_device *dev, byte reg, byte value) |
| { |
| de620_ready(dev); |
| outb(reg, DATA_PORT); |
| outb(NIC_Cmd ^ CS0, COMMAND_PORT); |
| |
| de620_put_byte(dev, value); |
| } |
| |
| static inline byte |
| de620_get_register(struct net_device *dev, byte reg) |
| { |
| byte value; |
| |
| de620_send_command(dev,reg); |
| value = de620_read_byte(dev); |
| de620_send_command(dev,W_DUMMY); |
| |
| return value; |
| } |
| |
| /********************************************************************* |
| * |
| * Open/initialize the board. |
| * |
| * This routine should set everything up anew at each open, even |
| * registers that "should" only need to be set once at boot, so that |
| * there is a non-reboot way to recover if something goes wrong. |
| * |
| */ |
| static int de620_open(struct net_device *dev) |
| { |
| int ret = request_irq(dev->irq, de620_interrupt, 0, dev->name, dev); |
| if (ret) { |
| printk (KERN_ERR "%s: unable to get IRQ %d\n", dev->name, dev->irq); |
| return ret; |
| } |
| |
| if (adapter_init(dev)) { |
| ret = -EIO; |
| goto out_free_irq; |
| } |
| |
| netif_start_queue(dev); |
| return 0; |
| |
| out_free_irq: |
| free_irq(dev->irq, dev); |
| return ret; |
| } |
| |
| /************************************************ |
| * |
| * The inverse routine to de620_open(). |
| * |
| */ |
| |
| static int de620_close(struct net_device *dev) |
| { |
| netif_stop_queue(dev); |
| /* disable recv */ |
| de620_set_register(dev, W_TCR, RXOFF); |
| free_irq(dev->irq, dev); |
| return 0; |
| } |
| |
| /********************************************* |
| * |
| * Set or clear the multicast filter for this adaptor. |
| * (no real multicast implemented for the DE-620, but she can be promiscuous...) |
| * |
| */ |
| |
| static void de620_set_multicast_list(struct net_device *dev) |
| { |
| if (!netdev_mc_empty(dev) || dev->flags&(IFF_ALLMULTI|IFF_PROMISC)) |
| { /* Enable promiscuous mode */ |
| de620_set_register(dev, W_TCR, (TCR_DEF & ~RXPBM) | RXALL); |
| } |
| else |
| { /* Disable promiscuous mode, use normal mode */ |
| de620_set_register(dev, W_TCR, TCR_DEF); |
| } |
| } |
| |
| /******************************************************* |
| * |
| * Handle timeouts on transmit |
| */ |
| |
| static void de620_timeout(struct net_device *dev) |
| { |
| printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name, "network cable problem"); |
| /* Restart the adapter. */ |
| if (!adapter_init(dev)) /* maybe close it */ |
| netif_wake_queue(dev); |
| } |
| |
| /******************************************************* |
| * |
| * Copy a buffer to the adapter transmit page memory. |
| * Start sending. |
| */ |
| static int de620_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| unsigned long flags; |
| int len; |
| byte *buffer = skb->data; |
| byte using_txbuf; |
| |
| using_txbuf = de620_tx_buffs(dev); /* Peek at the adapter */ |
| |
| netif_stop_queue(dev); |
| |
| |
| if ((len = skb->len) < RUNT) |
| len = RUNT; |
| if (len & 1) /* send an even number of bytes */ |
| ++len; |
| |
| /* Start real output */ |
| |
| spin_lock_irqsave(&de620_lock, flags); |
| pr_debug("de620_start_xmit: len=%d, bufs 0x%02x\n", |
| (int)skb->len, using_txbuf); |
| |
| /* select a free tx buffer. if there is one... */ |
| switch (using_txbuf) { |
| default: /* both are free: use TXBF0 */ |
| case TXBF1: /* use TXBF0 */ |
| de620_send_command(dev,W_CR | RW0); |
| using_txbuf |= TXBF0; |
| break; |
| |
| case TXBF0: /* use TXBF1 */ |
| de620_send_command(dev,W_CR | RW1); |
| using_txbuf |= TXBF1; |
| break; |
| |
| case (TXBF0 | TXBF1): /* NONE!!! */ |
| printk(KERN_WARNING "%s: No tx-buffer available!\n", dev->name); |
| spin_unlock_irqrestore(&de620_lock, flags); |
| return NETDEV_TX_BUSY; |
| } |
| de620_write_block(dev, buffer, skb->len, len-skb->len); |
| |
| if(!(using_txbuf == (TXBF0 | TXBF1))) |
| netif_wake_queue(dev); |
| |
| dev->stats.tx_packets++; |
| spin_unlock_irqrestore(&de620_lock, flags); |
| dev_kfree_skb (skb); |
| return NETDEV_TX_OK; |
| } |
| |
| /***************************************************** |
| * |
| * Handle the network interface interrupts. |
| * |
| */ |
| static irqreturn_t |
| de620_interrupt(int irq_in, void *dev_id) |
| { |
| struct net_device *dev = dev_id; |
| byte irq_status; |
| int bogus_count = 0; |
| int again = 0; |
| |
| spin_lock(&de620_lock); |
| |
| /* Read the status register (_not_ the status port) */ |
| irq_status = de620_get_register(dev, R_STS); |
| |
| pr_debug("de620_interrupt (%2.2X)\n", irq_status); |
| |
| if (irq_status & RXGOOD) { |
| do { |
| again = de620_rx_intr(dev); |
| pr_debug("again=%d\n", again); |
| } |
| while (again && (++bogus_count < 100)); |
| } |
| |
| if(de620_tx_buffs(dev) != (TXBF0 | TXBF1)) |
| netif_wake_queue(dev); |
| |
| spin_unlock(&de620_lock); |
| return IRQ_HANDLED; |
| } |
| |
| /************************************** |
| * |
| * Get a packet from the adapter |
| * |
| * Send it "upstairs" |
| * |
| */ |
| static int de620_rx_intr(struct net_device *dev) |
| { |
| struct header_buf { |
| byte status; |
| byte Rx_NextPage; |
| unsigned short Rx_ByteCount; |
| } header_buf; |
| struct sk_buff *skb; |
| int size; |
| byte *buffer; |
| byte pagelink; |
| byte curr_page; |
| |
| pr_debug("de620_rx_intr: next_rx_page = %d\n", next_rx_page); |
| |
| /* Tell the adapter that we are going to read data, and from where */ |
| de620_send_command(dev, W_CR | RRN); |
| de620_set_register(dev, W_RSA1, next_rx_page); |
| de620_set_register(dev, W_RSA0, 0); |
| |
| /* Deep breath, and away we goooooo */ |
| de620_read_block(dev, (byte *)&header_buf, sizeof(struct header_buf)); |
| pr_debug("page status=0x%02x, nextpage=%d, packetsize=%d\n", |
| header_buf.status, header_buf.Rx_NextPage, |
| header_buf.Rx_ByteCount); |
| |
| /* Plausible page header? */ |
| pagelink = header_buf.Rx_NextPage; |
| if ((pagelink < first_rx_page) || (last_rx_page < pagelink)) { |
| /* Ouch... Forget it! Skip all and start afresh... */ |
| printk(KERN_WARNING "%s: Ring overrun? Restoring...\n", dev->name); |
| /* You win some, you lose some. And sometimes plenty... */ |
| adapter_init(dev); |
| netif_wake_queue(dev); |
| dev->stats.rx_over_errors++; |
| return 0; |
| } |
| |
| /* OK, this look good, so far. Let's see if it's consistent... */ |
| /* Let's compute the start of the next packet, based on where we are */ |
| pagelink = next_rx_page + |
| ((header_buf.Rx_ByteCount + (4 - 1 + 0x100)) >> 8); |
| |
| /* Are we going to wrap around the page counter? */ |
| if (pagelink > last_rx_page) |
| pagelink -= (last_rx_page - first_rx_page + 1); |
| |
| /* Is the _computed_ next page number equal to what the adapter says? */ |
| if (pagelink != header_buf.Rx_NextPage) { |
| /* Naah, we'll skip this packet. Probably bogus data as well */ |
| printk(KERN_WARNING "%s: Page link out of sync! Restoring...\n", dev->name); |
| next_rx_page = header_buf.Rx_NextPage; /* at least a try... */ |
| de620_send_command(dev, W_DUMMY); |
| de620_set_register(dev, W_NPRF, next_rx_page); |
| dev->stats.rx_over_errors++; |
| return 0; |
| } |
| next_rx_page = pagelink; |
| |
| size = header_buf.Rx_ByteCount - 4; |
| if ((size < RUNT) || (GIANT < size)) { |
| printk(KERN_WARNING "%s: Illegal packet size: %d!\n", dev->name, size); |
| } |
| else { /* Good packet? */ |
| skb = dev_alloc_skb(size+2); |
| if (skb == NULL) { /* Yeah, but no place to put it... */ |
| printk(KERN_WARNING "%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, size); |
| dev->stats.rx_dropped++; |
| } |
| else { /* Yep! Go get it! */ |
| skb_reserve(skb,2); /* Align */ |
| /* skb->data points to the start of sk_buff data area */ |
| buffer = skb_put(skb,size); |
| /* copy the packet into the buffer */ |
| de620_read_block(dev, buffer, size); |
| pr_debug("Read %d bytes\n", size); |
| skb->protocol=eth_type_trans(skb,dev); |
| netif_rx(skb); /* deliver it "upstairs" */ |
| /* count all receives */ |
| dev->stats.rx_packets++; |
| dev->stats.rx_bytes += size; |
| } |
| } |
| |
| /* Let's peek ahead to see if we have read the last current packet */ |
| /* NOTE! We're _not_ checking the 'EMPTY'-flag! This seems better... */ |
| curr_page = de620_get_register(dev, R_CPR); |
| de620_set_register(dev, W_NPRF, next_rx_page); |
| pr_debug("next_rx_page=%d CPR=%d\n", next_rx_page, curr_page); |
| |
| return next_rx_page != curr_page; /* That was slightly tricky... */ |
| } |
| |
| /********************************************* |
| * |
| * Reset the adapter to a known state |
| * |
| */ |
| static int adapter_init(struct net_device *dev) |
| { |
| int i; |
| static int was_down; |
| |
| if ((nic_data.Model == 3) || (nic_data.Model == 0)) { /* CT */ |
| EIPRegister = NCTL0; |
| if (nic_data.Media != 1) |
| EIPRegister |= NIS0; /* not BNC */ |
| } |
| else if (nic_data.Model == 2) { /* UTP */ |
| EIPRegister = NCTL0 | NIS0; |
| } |
| |
| if (utp) |
| EIPRegister = NCTL0 | NIS0; |
| if (bnc) |
| EIPRegister = NCTL0; |
| |
| de620_send_command(dev, W_CR | RNOP | CLEAR); |
| de620_send_command(dev, W_CR | RNOP); |
| |
| de620_set_register(dev, W_SCR, SCR_DEF); |
| /* disable recv to wait init */ |
| de620_set_register(dev, W_TCR, RXOFF); |
| |
| /* Set the node ID in the adapter */ |
| for (i = 0; i < 6; ++i) { /* W_PARn = 0xaa + n */ |
| de620_set_register(dev, W_PAR0 + i, dev->dev_addr[i]); |
| } |
| |
| de620_set_register(dev, W_EIP, EIPRegister); |
| |
| next_rx_page = first_rx_page = DE620_RX_START_PAGE; |
| if (nic_data.RAM_Size) |
| last_rx_page = nic_data.RAM_Size - 1; |
| else /* 64k RAM */ |
| last_rx_page = 255; |
| |
| de620_set_register(dev, W_SPR, first_rx_page); /* Start Page Register*/ |
| de620_set_register(dev, W_EPR, last_rx_page); /* End Page Register */ |
| de620_set_register(dev, W_CPR, first_rx_page);/*Current Page Register*/ |
| de620_send_command(dev, W_NPR | first_rx_page); /* Next Page Register*/ |
| de620_send_command(dev, W_DUMMY); |
| de620_set_delay(dev); |
| |
| /* Final sanity check: Anybody out there? */ |
| /* Let's hope some bits from the statusregister make a good check */ |
| #define CHECK_MASK ( 0 | TXSUC | T16 | 0 | RXCRC | RXSHORT | 0 | 0 ) |
| #define CHECK_OK ( 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 ) |
| /* success: X 0 0 X 0 0 X X */ |
| /* ignore: EEDI RXGOOD COLS LNKS*/ |
| |
| if (((i = de620_get_register(dev, R_STS)) & CHECK_MASK) != CHECK_OK) { |
| printk(KERN_ERR "%s: Something has happened to the DE-620! Please check it" |
| #ifdef SHUTDOWN_WHEN_LOST |
| " and do a new ifconfig" |
| #endif |
| "! (%02x)\n", dev->name, i); |
| #ifdef SHUTDOWN_WHEN_LOST |
| /* Goodbye, cruel world... */ |
| dev->flags &= ~IFF_UP; |
| de620_close(dev); |
| #endif |
| was_down = 1; |
| return 1; /* failed */ |
| } |
| if (was_down) { |
| printk(KERN_WARNING "%s: Thanks, I feel much better now!\n", dev->name); |
| was_down = 0; |
| } |
| |
| /* All OK, go ahead... */ |
| de620_set_register(dev, W_TCR, TCR_DEF); |
| |
| return 0; /* all ok */ |
| } |
| |
| static const struct net_device_ops de620_netdev_ops = { |
| .ndo_open = de620_open, |
| .ndo_stop = de620_close, |
| .ndo_start_xmit = de620_start_xmit, |
| .ndo_tx_timeout = de620_timeout, |
| .ndo_set_multicast_list = de620_set_multicast_list, |
| .ndo_change_mtu = eth_change_mtu, |
| .ndo_set_mac_address = eth_mac_addr, |
| .ndo_validate_addr = eth_validate_addr, |
| }; |
| |
| /****************************************************************************** |
| * |
| * Only start-up code below |
| * |
| */ |
| /**************************************** |
| * |
| * Check if there is a DE-620 connected |
| */ |
| struct net_device * __init de620_probe(int unit) |
| { |
| byte checkbyte = 0xa5; |
| struct net_device *dev; |
| int err = -ENOMEM; |
| int i; |
| |
| dev = alloc_etherdev(0); |
| if (!dev) |
| goto out; |
| |
| spin_lock_init(&de620_lock); |
| |
| /* |
| * This is where the base_addr and irq gets set. |
| * Tunable at compile-time and insmod-time |
| */ |
| dev->base_addr = io; |
| dev->irq = irq; |
| |
| /* allow overriding parameters on command line */ |
| if (unit >= 0) { |
| sprintf(dev->name, "eth%d", unit); |
| netdev_boot_setup_check(dev); |
| } |
| |
| pr_debug("%s", version); |
| |
| printk(KERN_INFO "D-Link DE-620 pocket adapter"); |
| |
| if (!request_region(dev->base_addr, 3, "de620")) { |
| printk(" io 0x%3lX, which is busy.\n", dev->base_addr); |
| err = -EBUSY; |
| goto out1; |
| } |
| |
| /* Initially, configure basic nibble mode, so we can read the EEPROM */ |
| NIC_Cmd = DEF_NIC_CMD; |
| de620_set_register(dev, W_EIP, EIPRegister); |
| |
| /* Anybody out there? */ |
| de620_set_register(dev, W_CPR, checkbyte); |
| checkbyte = de620_get_register(dev, R_CPR); |
| |
| if ((checkbyte != 0xa5) || (read_eeprom(dev) != 0)) { |
| printk(" not identified in the printer port\n"); |
| err = -ENODEV; |
| goto out2; |
| } |
| |
| /* else, got it! */ |
| dev->dev_addr[0] = nic_data.NodeID[0]; |
| for (i = 1; i < ETH_ALEN; i++) { |
| dev->dev_addr[i] = nic_data.NodeID[i]; |
| dev->broadcast[i] = 0xff; |
| } |
| |
| printk(", Ethernet Address: %pM", dev->dev_addr); |
| |
| printk(" (%dk RAM,", |
| (nic_data.RAM_Size) ? (nic_data.RAM_Size >> 2) : 64); |
| |
| if (nic_data.Media == 1) |
| printk(" BNC)\n"); |
| else |
| printk(" UTP)\n"); |
| |
| dev->netdev_ops = &de620_netdev_ops; |
| dev->watchdog_timeo = HZ*2; |
| |
| /* base_addr and irq are already set, see above! */ |
| |
| /* dump eeprom */ |
| pr_debug("\nEEPROM contents:\n" |
| "RAM_Size = 0x%02X\n" |
| "NodeID = %pM\n" |
| "Model = %d\n" |
| "Media = %d\n" |
| "SCR = 0x%02x\n", nic_data.RAM_Size, nic_data.NodeID, |
| nic_data.Model, nic_data.Media, nic_data.SCR); |
| |
| err = register_netdev(dev); |
| if (err) |
| goto out2; |
| return dev; |
| |
| out2: |
| release_region(dev->base_addr, 3); |
| out1: |
| free_netdev(dev); |
| out: |
| return ERR_PTR(err); |
| } |
| |
| /********************************** |
| * |
| * Read info from on-board EEPROM |
| * |
| * Note: Bitwise serial I/O to/from the EEPROM vi the status _register_! |
| */ |
| #define sendit(dev,data) de620_set_register(dev, W_EIP, data | EIPRegister); |
| |
| static unsigned short __init ReadAWord(struct net_device *dev, int from) |
| { |
| unsigned short data; |
| int nbits; |
| |
| /* cs [__~~] SET SEND STATE */ |
| /* di [____] */ |
| /* sck [_~~_] */ |
| sendit(dev, 0); sendit(dev, 1); sendit(dev, 5); sendit(dev, 4); |
| |
| /* Send the 9-bit address from where we want to read the 16-bit word */ |
| for (nbits = 9; nbits > 0; --nbits, from <<= 1) { |
| if (from & 0x0100) { /* bit set? */ |
| /* cs [~~~~] SEND 1 */ |
| /* di [~~~~] */ |
| /* sck [_~~_] */ |
| sendit(dev, 6); sendit(dev, 7); sendit(dev, 7); sendit(dev, 6); |
| } |
| else { |
| /* cs [~~~~] SEND 0 */ |
| /* di [____] */ |
| /* sck [_~~_] */ |
| sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4); |
| } |
| } |
| |
| /* Shift in the 16-bit word. The bits appear serially in EEDI (=0x80) */ |
| for (data = 0, nbits = 16; nbits > 0; --nbits) { |
| /* cs [~~~~] SEND 0 */ |
| /* di [____] */ |
| /* sck [_~~_] */ |
| sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4); |
| data = (data << 1) | ((de620_get_register(dev, R_STS) & EEDI) >> 7); |
| } |
| /* cs [____] RESET SEND STATE */ |
| /* di [____] */ |
| /* sck [_~~_] */ |
| sendit(dev, 0); sendit(dev, 1); sendit(dev, 1); sendit(dev, 0); |
| |
| return data; |
| } |
| |
| static int __init read_eeprom(struct net_device *dev) |
| { |
| unsigned short wrd; |
| |
| /* D-Link Ethernet addresses are in the series 00:80:c8:7X:XX:XX:XX */ |
| wrd = ReadAWord(dev, 0x1aa); /* bytes 0 + 1 of NodeID */ |
| if (!clone && (wrd != htons(0x0080))) /* Valid D-Link ether sequence? */ |
| return -1; /* Nope, not a DE-620 */ |
| nic_data.NodeID[0] = wrd & 0xff; |
| nic_data.NodeID[1] = wrd >> 8; |
| |
| wrd = ReadAWord(dev, 0x1ab); /* bytes 2 + 3 of NodeID */ |
| if (!clone && ((wrd & 0xff) != 0xc8)) /* Valid D-Link ether sequence? */ |
| return -1; /* Nope, not a DE-620 */ |
| nic_data.NodeID[2] = wrd & 0xff; |
| nic_data.NodeID[3] = wrd >> 8; |
| |
| wrd = ReadAWord(dev, 0x1ac); /* bytes 4 + 5 of NodeID */ |
| nic_data.NodeID[4] = wrd & 0xff; |
| nic_data.NodeID[5] = wrd >> 8; |
| |
| wrd = ReadAWord(dev, 0x1ad); /* RAM size in pages (256 bytes). 0 = 64k */ |
| nic_data.RAM_Size = (wrd >> 8); |
| |
| wrd = ReadAWord(dev, 0x1ae); /* hardware model (CT = 3) */ |
| nic_data.Model = (wrd & 0xff); |
| |
| wrd = ReadAWord(dev, 0x1af); /* media (indicates BNC/UTP) */ |
| nic_data.Media = (wrd & 0xff); |
| |
| wrd = ReadAWord(dev, 0x1a8); /* System Configuration Register */ |
| nic_data.SCR = (wrd >> 8); |
| |
| return 0; /* no errors */ |
| } |
| |
| /****************************************************************************** |
| * |
| * Loadable module skeleton |
| * |
| */ |
| #ifdef MODULE |
| static struct net_device *de620_dev; |
| |
| int __init init_module(void) |
| { |
| de620_dev = de620_probe(-1); |
| if (IS_ERR(de620_dev)) |
| return PTR_ERR(de620_dev); |
| return 0; |
| } |
| |
| void cleanup_module(void) |
| { |
| unregister_netdev(de620_dev); |
| release_region(de620_dev->base_addr, 3); |
| free_netdev(de620_dev); |
| } |
| #endif /* MODULE */ |
| MODULE_LICENSE("GPL"); |