| /* |
| * Linux Ethernet device driver for the 3Com Etherlink Plus (3C505) |
| * By Craig Southeren, Juha Laiho and Philip Blundell |
| * |
| * 3c505.c This module implements an interface to the 3Com |
| * Etherlink Plus (3c505) Ethernet card. Linux device |
| * driver interface reverse engineered from the Linux 3C509 |
| * device drivers. Some 3C505 information gleaned from |
| * the Crynwr packet driver. Still this driver would not |
| * be here without 3C505 technical reference provided by |
| * 3Com. |
| * |
| * $Id: 3c505.c,v 1.10 1996/04/16 13:06:27 phil Exp $ |
| * |
| * Authors: Linux 3c505 device driver by |
| * Craig Southeren, <craigs@ineluki.apana.org.au> |
| * Final debugging by |
| * Andrew Tridgell, <tridge@nimbus.anu.edu.au> |
| * Auto irq/address, tuning, cleanup and v1.1.4+ kernel mods by |
| * Juha Laiho, <jlaiho@ichaos.nullnet.fi> |
| * Linux 3C509 driver by |
| * Donald Becker, <becker@super.org> |
| * (Now at <becker@scyld.com>) |
| * Crynwr packet driver by |
| * Krishnan Gopalan and Gregg Stefancik, |
| * Clemson University Engineering Computer Operations. |
| * Portions of the code have been adapted from the 3c505 |
| * driver for NCSA Telnet by Bruce Orchard and later |
| * modified by Warren Van Houten and krus@diku.dk. |
| * 3C505 technical information provided by |
| * Terry Murphy, of 3Com Network Adapter Division |
| * Linux 1.3.0 changes by |
| * Alan Cox <Alan.Cox@linux.org> |
| * More debugging, DMA support, currently maintained by |
| * Philip Blundell <philb@gnu.org> |
| * Multicard/soft configurable dma channel/rev 2 hardware support |
| * by Christopher Collins <ccollins@pcug.org.au> |
| * Ethtool support (jgarzik), 11/17/2001 |
| */ |
| |
| #define DRV_NAME "3c505" |
| #define DRV_VERSION "1.10a" |
| |
| |
| /* Theory of operation: |
| * |
| * The 3c505 is quite an intelligent board. All communication with it is done |
| * by means of Primary Command Blocks (PCBs); these are transferred using PIO |
| * through the command register. The card has 256k of on-board RAM, which is |
| * used to buffer received packets. It might seem at first that more buffers |
| * are better, but in fact this isn't true. From my tests, it seems that |
| * more than about 10 buffers are unnecessary, and there is a noticeable |
| * performance hit in having more active on the card. So the majority of the |
| * card's memory isn't, in fact, used. Sadly, the card only has one transmit |
| * buffer and, short of loading our own firmware into it (which is what some |
| * drivers resort to) there's nothing we can do about this. |
| * |
| * We keep up to 4 "receive packet" commands active on the board at a time. |
| * When a packet comes in, so long as there is a receive command active, the |
| * board will send us a "packet received" PCB and then add the data for that |
| * packet to the DMA queue. If a DMA transfer is not already in progress, we |
| * set one up to start uploading the data. We have to maintain a list of |
| * backlogged receive packets, because the card may decide to tell us about |
| * a newly-arrived packet at any time, and we may not be able to start a DMA |
| * transfer immediately (ie one may already be going on). We can't NAK the |
| * PCB, because then it would throw the packet away. |
| * |
| * Trying to send a PCB to the card at the wrong moment seems to have bad |
| * effects. If we send it a transmit PCB while a receive DMA is happening, |
| * it will just NAK the PCB and so we will have wasted our time. Worse, it |
| * sometimes seems to interrupt the transfer. The majority of the low-level |
| * code is protected by one huge semaphore -- "busy" -- which is set whenever |
| * it probably isn't safe to do anything to the card. The receive routine |
| * must gain a lock on "busy" before it can start a DMA transfer, and the |
| * transmit routine must gain a lock before it sends the first PCB to the card. |
| * The send_pcb() routine also has an internal semaphore to protect it against |
| * being re-entered (which would be disastrous) -- this is needed because |
| * several things can happen asynchronously (re-priming the receiver and |
| * asking the card for statistics, for example). send_pcb() will also refuse |
| * to talk to the card at all if a DMA upload is happening. The higher-level |
| * networking code will reschedule a later retry if some part of the driver |
| * is blocked. In practice, this doesn't seem to happen very often. |
| */ |
| |
| /* This driver may now work with revision 2.x hardware, since all the read |
| * operations on the HCR have been removed (we now keep our own softcopy). |
| * But I don't have an old card to test it on. |
| * |
| * This has had the bad effect that the autoprobe routine is now a bit |
| * less friendly to other devices. However, it was never very good. |
| * before, so I doubt it will hurt anybody. |
| */ |
| |
| /* The driver is a mess. I took Craig's and Juha's code, and hacked it firstly |
| * to make it more reliable, and secondly to add DMA mode. Many things could |
| * probably be done better; the concurrency protection is particularly awful. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/interrupt.h> |
| #include <linux/errno.h> |
| #include <linux/in.h> |
| #include <linux/slab.h> |
| #include <linux/ioport.h> |
| #include <linux/spinlock.h> |
| #include <linux/ethtool.h> |
| #include <linux/delay.h> |
| #include <linux/bitops.h> |
| |
| #include <asm/uaccess.h> |
| #include <asm/io.h> |
| #include <asm/dma.h> |
| |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/init.h> |
| |
| #include "3c505.h" |
| |
| /********************************************************* |
| * |
| * define debug messages here as common strings to reduce space |
| * |
| *********************************************************/ |
| |
| static const char filename[] = __FILE__; |
| |
| static const char timeout_msg[] = "*** timeout at %s:%s (line %d) ***\n"; |
| #define TIMEOUT_MSG(lineno) \ |
| printk(timeout_msg, filename,__FUNCTION__,(lineno)) |
| |
| static const char invalid_pcb_msg[] = |
| "*** invalid pcb length %d at %s:%s (line %d) ***\n"; |
| #define INVALID_PCB_MSG(len) \ |
| printk(invalid_pcb_msg, (len),filename,__FUNCTION__,__LINE__) |
| |
| static char search_msg[] __initdata = KERN_INFO "%s: Looking for 3c505 adapter at address %#x..."; |
| |
| static char stilllooking_msg[] __initdata = "still looking..."; |
| |
| static char found_msg[] __initdata = "found.\n"; |
| |
| static char notfound_msg[] __initdata = "not found (reason = %d)\n"; |
| |
| static char couldnot_msg[] __initdata = KERN_INFO "%s: 3c505 not found\n"; |
| |
| /********************************************************* |
| * |
| * various other debug stuff |
| * |
| *********************************************************/ |
| |
| #ifdef ELP_DEBUG |
| static int elp_debug = ELP_DEBUG; |
| #else |
| static int elp_debug; |
| #endif |
| #define debug elp_debug |
| |
| /* |
| * 0 = no messages (well, some) |
| * 1 = messages when high level commands performed |
| * 2 = messages when low level commands performed |
| * 3 = messages when interrupts received |
| */ |
| |
| /***************************************************************** |
| * |
| * List of I/O-addresses we try to auto-sense |
| * Last element MUST BE 0! |
| *****************************************************************/ |
| |
| static int addr_list[] __initdata = {0x300, 0x280, 0x310, 0}; |
| |
| /* Dma Memory related stuff */ |
| |
| static unsigned long dma_mem_alloc(int size) |
| { |
| int order = get_order(size); |
| return __get_dma_pages(GFP_KERNEL, order); |
| } |
| |
| |
| /***************************************************************** |
| * |
| * Functions for I/O (note the inline !) |
| * |
| *****************************************************************/ |
| |
| static inline unsigned char inb_status(unsigned int base_addr) |
| { |
| return inb(base_addr + PORT_STATUS); |
| } |
| |
| static inline int inb_command(unsigned int base_addr) |
| { |
| return inb(base_addr + PORT_COMMAND); |
| } |
| |
| static inline void outb_control(unsigned char val, struct net_device *dev) |
| { |
| outb(val, dev->base_addr + PORT_CONTROL); |
| ((elp_device *)(dev->priv))->hcr_val = val; |
| } |
| |
| #define HCR_VAL(x) (((elp_device *)((x)->priv))->hcr_val) |
| |
| static inline void outb_command(unsigned char val, unsigned int base_addr) |
| { |
| outb(val, base_addr + PORT_COMMAND); |
| } |
| |
| static inline unsigned int backlog_next(unsigned int n) |
| { |
| return (n + 1) % BACKLOG_SIZE; |
| } |
| |
| /***************************************************************** |
| * |
| * useful functions for accessing the adapter |
| * |
| *****************************************************************/ |
| |
| /* |
| * use this routine when accessing the ASF bits as they are |
| * changed asynchronously by the adapter |
| */ |
| |
| /* get adapter PCB status */ |
| #define GET_ASF(addr) \ |
| (get_status(addr)&ASF_PCB_MASK) |
| |
| static inline int get_status(unsigned int base_addr) |
| { |
| unsigned long timeout = jiffies + 10*HZ/100; |
| register int stat1; |
| do { |
| stat1 = inb_status(base_addr); |
| } while (stat1 != inb_status(base_addr) && time_before(jiffies, timeout)); |
| if (time_after_eq(jiffies, timeout)) |
| TIMEOUT_MSG(__LINE__); |
| return stat1; |
| } |
| |
| static inline void set_hsf(struct net_device *dev, int hsf) |
| { |
| elp_device *adapter = dev->priv; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&adapter->lock, flags); |
| outb_control((HCR_VAL(dev) & ~HSF_PCB_MASK) | hsf, dev); |
| spin_unlock_irqrestore(&adapter->lock, flags); |
| } |
| |
| static bool start_receive(struct net_device *, pcb_struct *); |
| |
| static inline void adapter_reset(struct net_device *dev) |
| { |
| unsigned long timeout; |
| elp_device *adapter = dev->priv; |
| unsigned char orig_hcr = adapter->hcr_val; |
| |
| outb_control(0, dev); |
| |
| if (inb_status(dev->base_addr) & ACRF) { |
| do { |
| inb_command(dev->base_addr); |
| timeout = jiffies + 2*HZ/100; |
| while (time_before_eq(jiffies, timeout) && !(inb_status(dev->base_addr) & ACRF)); |
| } while (inb_status(dev->base_addr) & ACRF); |
| set_hsf(dev, HSF_PCB_NAK); |
| } |
| outb_control(adapter->hcr_val | ATTN | DIR, dev); |
| mdelay(10); |
| outb_control(adapter->hcr_val & ~ATTN, dev); |
| mdelay(10); |
| outb_control(adapter->hcr_val | FLSH, dev); |
| mdelay(10); |
| outb_control(adapter->hcr_val & ~FLSH, dev); |
| mdelay(10); |
| |
| outb_control(orig_hcr, dev); |
| if (!start_receive(dev, &adapter->tx_pcb)) |
| printk(KERN_ERR "%s: start receive command failed \n", dev->name); |
| } |
| |
| /* Check to make sure that a DMA transfer hasn't timed out. This should |
| * never happen in theory, but seems to occur occasionally if the card gets |
| * prodded at the wrong time. |
| */ |
| static inline void check_3c505_dma(struct net_device *dev) |
| { |
| elp_device *adapter = dev->priv; |
| if (adapter->dmaing && time_after(jiffies, adapter->current_dma.start_time + 10)) { |
| unsigned long flags, f; |
| printk(KERN_ERR "%s: DMA %s timed out, %d bytes left\n", dev->name, adapter->current_dma.direction ? "download" : "upload", get_dma_residue(dev->dma)); |
| spin_lock_irqsave(&adapter->lock, flags); |
| adapter->dmaing = 0; |
| adapter->busy = 0; |
| |
| f=claim_dma_lock(); |
| disable_dma(dev->dma); |
| release_dma_lock(f); |
| |
| if (adapter->rx_active) |
| adapter->rx_active--; |
| outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev); |
| spin_unlock_irqrestore(&adapter->lock, flags); |
| } |
| } |
| |
| /* Primitive functions used by send_pcb() */ |
| static inline bool send_pcb_slow(unsigned int base_addr, unsigned char byte) |
| { |
| unsigned long timeout; |
| outb_command(byte, base_addr); |
| for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) { |
| if (inb_status(base_addr) & HCRE) |
| return false; |
| } |
| printk(KERN_WARNING "3c505: send_pcb_slow timed out\n"); |
| return true; |
| } |
| |
| static inline bool send_pcb_fast(unsigned int base_addr, unsigned char byte) |
| { |
| unsigned int timeout; |
| outb_command(byte, base_addr); |
| for (timeout = 0; timeout < 40000; timeout++) { |
| if (inb_status(base_addr) & HCRE) |
| return false; |
| } |
| printk(KERN_WARNING "3c505: send_pcb_fast timed out\n"); |
| return true; |
| } |
| |
| /* Check to see if the receiver needs restarting, and kick it if so */ |
| static inline void prime_rx(struct net_device *dev) |
| { |
| elp_device *adapter = dev->priv; |
| while (adapter->rx_active < ELP_RX_PCBS && netif_running(dev)) { |
| if (!start_receive(dev, &adapter->itx_pcb)) |
| break; |
| } |
| } |
| |
| /***************************************************************** |
| * |
| * send_pcb |
| * Send a PCB to the adapter. |
| * |
| * output byte to command reg --<--+ |
| * wait until HCRE is non zero | |
| * loop until all bytes sent -->--+ |
| * set HSF1 and HSF2 to 1 |
| * output pcb length |
| * wait until ASF give ACK or NAK |
| * set HSF1 and HSF2 to 0 |
| * |
| *****************************************************************/ |
| |
| /* This can be quite slow -- the adapter is allowed to take up to 40ms |
| * to respond to the initial interrupt. |
| * |
| * We run initially with interrupts turned on, but with a semaphore set |
| * so that nobody tries to re-enter this code. Once the first byte has |
| * gone through, we turn interrupts off and then send the others (the |
| * timeout is reduced to 500us). |
| */ |
| |
| static bool send_pcb(struct net_device *dev, pcb_struct * pcb) |
| { |
| int i; |
| unsigned long timeout; |
| elp_device *adapter = dev->priv; |
| unsigned long flags; |
| |
| check_3c505_dma(dev); |
| |
| if (adapter->dmaing && adapter->current_dma.direction == 0) |
| return false; |
| |
| /* Avoid contention */ |
| if (test_and_set_bit(1, &adapter->send_pcb_semaphore)) { |
| if (elp_debug >= 3) { |
| printk(KERN_DEBUG "%s: send_pcb entered while threaded\n", dev->name); |
| } |
| return false; |
| } |
| /* |
| * load each byte into the command register and |
| * wait for the HCRE bit to indicate the adapter |
| * had read the byte |
| */ |
| set_hsf(dev, 0); |
| |
| if (send_pcb_slow(dev->base_addr, pcb->command)) |
| goto abort; |
| |
| spin_lock_irqsave(&adapter->lock, flags); |
| |
| if (send_pcb_fast(dev->base_addr, pcb->length)) |
| goto sti_abort; |
| |
| for (i = 0; i < pcb->length; i++) { |
| if (send_pcb_fast(dev->base_addr, pcb->data.raw[i])) |
| goto sti_abort; |
| } |
| |
| outb_control(adapter->hcr_val | 3, dev); /* signal end of PCB */ |
| outb_command(2 + pcb->length, dev->base_addr); |
| |
| /* now wait for the acknowledgement */ |
| spin_unlock_irqrestore(&adapter->lock, flags); |
| |
| for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) { |
| switch (GET_ASF(dev->base_addr)) { |
| case ASF_PCB_ACK: |
| adapter->send_pcb_semaphore = 0; |
| return true; |
| |
| case ASF_PCB_NAK: |
| #ifdef ELP_DEBUG |
| printk(KERN_DEBUG "%s: send_pcb got NAK\n", dev->name); |
| #endif |
| goto abort; |
| } |
| } |
| |
| if (elp_debug >= 1) |
| printk(KERN_DEBUG "%s: timeout waiting for PCB acknowledge (status %02x)\n", dev->name, inb_status(dev->base_addr)); |
| goto abort; |
| |
| sti_abort: |
| spin_unlock_irqrestore(&adapter->lock, flags); |
| abort: |
| adapter->send_pcb_semaphore = 0; |
| return false; |
| } |
| |
| |
| /***************************************************************** |
| * |
| * receive_pcb |
| * Read a PCB from the adapter |
| * |
| * wait for ACRF to be non-zero ---<---+ |
| * input a byte | |
| * if ASF1 and ASF2 were not both one | |
| * before byte was read, loop --->---+ |
| * set HSF1 and HSF2 for ack |
| * |
| *****************************************************************/ |
| |
| static bool receive_pcb(struct net_device *dev, pcb_struct * pcb) |
| { |
| int i, j; |
| int total_length; |
| int stat; |
| unsigned long timeout; |
| unsigned long flags; |
| |
| elp_device *adapter = dev->priv; |
| |
| set_hsf(dev, 0); |
| |
| /* get the command code */ |
| timeout = jiffies + 2*HZ/100; |
| while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout)); |
| if (time_after_eq(jiffies, timeout)) { |
| TIMEOUT_MSG(__LINE__); |
| return false; |
| } |
| pcb->command = inb_command(dev->base_addr); |
| |
| /* read the data length */ |
| timeout = jiffies + 3*HZ/100; |
| while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout)); |
| if (time_after_eq(jiffies, timeout)) { |
| TIMEOUT_MSG(__LINE__); |
| printk(KERN_INFO "%s: status %02x\n", dev->name, stat); |
| return false; |
| } |
| pcb->length = inb_command(dev->base_addr); |
| |
| if (pcb->length > MAX_PCB_DATA) { |
| INVALID_PCB_MSG(pcb->length); |
| adapter_reset(dev); |
| return false; |
| } |
| /* read the data */ |
| spin_lock_irqsave(&adapter->lock, flags); |
| i = 0; |
| do { |
| j = 0; |
| while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && j++ < 20000); |
| pcb->data.raw[i++] = inb_command(dev->base_addr); |
| if (i > MAX_PCB_DATA) |
| INVALID_PCB_MSG(i); |
| } while ((stat & ASF_PCB_MASK) != ASF_PCB_END && j < 20000); |
| spin_unlock_irqrestore(&adapter->lock, flags); |
| if (j >= 20000) { |
| TIMEOUT_MSG(__LINE__); |
| return false; |
| } |
| /* woops, the last "data" byte was really the length! */ |
| total_length = pcb->data.raw[--i]; |
| |
| /* safety check total length vs data length */ |
| if (total_length != (pcb->length + 2)) { |
| if (elp_debug >= 2) |
| printk(KERN_WARNING "%s: mangled PCB received\n", dev->name); |
| set_hsf(dev, HSF_PCB_NAK); |
| return false; |
| } |
| |
| if (pcb->command == CMD_RECEIVE_PACKET_COMPLETE) { |
| if (test_and_set_bit(0, (void *) &adapter->busy)) { |
| if (backlog_next(adapter->rx_backlog.in) == adapter->rx_backlog.out) { |
| set_hsf(dev, HSF_PCB_NAK); |
| printk(KERN_WARNING "%s: PCB rejected, transfer in progress and backlog full\n", dev->name); |
| pcb->command = 0; |
| return true; |
| } else { |
| pcb->command = 0xff; |
| } |
| } |
| } |
| set_hsf(dev, HSF_PCB_ACK); |
| return true; |
| } |
| |
| /****************************************************** |
| * |
| * queue a receive command on the adapter so we will get an |
| * interrupt when a packet is received. |
| * |
| ******************************************************/ |
| |
| static bool start_receive(struct net_device *dev, pcb_struct * tx_pcb) |
| { |
| bool status; |
| elp_device *adapter = dev->priv; |
| |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: restarting receiver\n", dev->name); |
| tx_pcb->command = CMD_RECEIVE_PACKET; |
| tx_pcb->length = sizeof(struct Rcv_pkt); |
| tx_pcb->data.rcv_pkt.buf_seg |
| = tx_pcb->data.rcv_pkt.buf_ofs = 0; /* Unused */ |
| tx_pcb->data.rcv_pkt.buf_len = 1600; |
| tx_pcb->data.rcv_pkt.timeout = 0; /* set timeout to zero */ |
| status = send_pcb(dev, tx_pcb); |
| if (status) |
| adapter->rx_active++; |
| return status; |
| } |
| |
| /****************************************************** |
| * |
| * extract a packet from the adapter |
| * this routine is only called from within the interrupt |
| * service routine, so no cli/sti calls are needed |
| * note that the length is always assumed to be even |
| * |
| ******************************************************/ |
| |
| static void receive_packet(struct net_device *dev, int len) |
| { |
| int rlen; |
| elp_device *adapter = dev->priv; |
| void *target; |
| struct sk_buff *skb; |
| unsigned long flags; |
| |
| rlen = (len + 1) & ~1; |
| skb = dev_alloc_skb(rlen + 2); |
| |
| if (!skb) { |
| printk(KERN_WARNING "%s: memory squeeze, dropping packet\n", dev->name); |
| target = adapter->dma_buffer; |
| adapter->current_dma.target = NULL; |
| /* FIXME: stats */ |
| return; |
| } |
| |
| skb_reserve(skb, 2); |
| target = skb_put(skb, rlen); |
| if ((unsigned long)(target + rlen) >= MAX_DMA_ADDRESS) { |
| adapter->current_dma.target = target; |
| target = adapter->dma_buffer; |
| } else { |
| adapter->current_dma.target = NULL; |
| } |
| |
| /* if this happens, we die */ |
| if (test_and_set_bit(0, (void *) &adapter->dmaing)) |
| printk(KERN_ERR "%s: rx blocked, DMA in progress, dir %d\n", dev->name, adapter->current_dma.direction); |
| |
| adapter->current_dma.direction = 0; |
| adapter->current_dma.length = rlen; |
| adapter->current_dma.skb = skb; |
| adapter->current_dma.start_time = jiffies; |
| |
| outb_control(adapter->hcr_val | DIR | TCEN | DMAE, dev); |
| |
| flags=claim_dma_lock(); |
| disable_dma(dev->dma); |
| clear_dma_ff(dev->dma); |
| set_dma_mode(dev->dma, 0x04); /* dma read */ |
| set_dma_addr(dev->dma, isa_virt_to_bus(target)); |
| set_dma_count(dev->dma, rlen); |
| enable_dma(dev->dma); |
| release_dma_lock(flags); |
| |
| if (elp_debug >= 3) { |
| printk(KERN_DEBUG "%s: rx DMA transfer started\n", dev->name); |
| } |
| |
| if (adapter->rx_active) |
| adapter->rx_active--; |
| |
| if (!adapter->busy) |
| printk(KERN_WARNING "%s: receive_packet called, busy not set.\n", dev->name); |
| } |
| |
| /****************************************************** |
| * |
| * interrupt handler |
| * |
| ******************************************************/ |
| |
| static irqreturn_t elp_interrupt(int irq, void *dev_id) |
| { |
| int len; |
| int dlen; |
| int icount = 0; |
| struct net_device *dev; |
| elp_device *adapter; |
| unsigned long timeout; |
| |
| dev = dev_id; |
| adapter = (elp_device *) dev->priv; |
| |
| spin_lock(&adapter->lock); |
| |
| do { |
| /* |
| * has a DMA transfer finished? |
| */ |
| if (inb_status(dev->base_addr) & DONE) { |
| if (!adapter->dmaing) { |
| printk(KERN_WARNING "%s: phantom DMA completed\n", dev->name); |
| } |
| if (elp_debug >= 3) { |
| printk(KERN_DEBUG "%s: %s DMA complete, status %02x\n", dev->name, adapter->current_dma.direction ? "tx" : "rx", inb_status(dev->base_addr)); |
| } |
| |
| outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev); |
| if (adapter->current_dma.direction) { |
| dev_kfree_skb_irq(adapter->current_dma.skb); |
| } else { |
| struct sk_buff *skb = adapter->current_dma.skb; |
| if (skb) { |
| if (adapter->current_dma.target) { |
| /* have already done the skb_put() */ |
| memcpy(adapter->current_dma.target, adapter->dma_buffer, adapter->current_dma.length); |
| } |
| skb->protocol = eth_type_trans(skb,dev); |
| adapter->stats.rx_bytes += skb->len; |
| netif_rx(skb); |
| dev->last_rx = jiffies; |
| } |
| } |
| adapter->dmaing = 0; |
| if (adapter->rx_backlog.in != adapter->rx_backlog.out) { |
| int t = adapter->rx_backlog.length[adapter->rx_backlog.out]; |
| adapter->rx_backlog.out = backlog_next(adapter->rx_backlog.out); |
| if (elp_debug >= 2) |
| printk(KERN_DEBUG "%s: receiving backlogged packet (%d)\n", dev->name, t); |
| receive_packet(dev, t); |
| } else { |
| adapter->busy = 0; |
| } |
| } else { |
| /* has one timed out? */ |
| check_3c505_dma(dev); |
| } |
| |
| /* |
| * receive a PCB from the adapter |
| */ |
| timeout = jiffies + 3*HZ/100; |
| while ((inb_status(dev->base_addr) & ACRF) != 0 && time_before(jiffies, timeout)) { |
| if (receive_pcb(dev, &adapter->irx_pcb)) { |
| switch (adapter->irx_pcb.command) |
| { |
| case 0: |
| break; |
| /* |
| * received a packet - this must be handled fast |
| */ |
| case 0xff: |
| case CMD_RECEIVE_PACKET_COMPLETE: |
| /* if the device isn't open, don't pass packets up the stack */ |
| if (!netif_running(dev)) |
| break; |
| len = adapter->irx_pcb.data.rcv_resp.pkt_len; |
| dlen = adapter->irx_pcb.data.rcv_resp.buf_len; |
| if (adapter->irx_pcb.data.rcv_resp.timeout != 0) { |
| printk(KERN_ERR "%s: interrupt - packet not received correctly\n", dev->name); |
| } else { |
| if (elp_debug >= 3) { |
| printk(KERN_DEBUG "%s: interrupt - packet received of length %i (%i)\n", dev->name, len, dlen); |
| } |
| if (adapter->irx_pcb.command == 0xff) { |
| if (elp_debug >= 2) |
| printk(KERN_DEBUG "%s: adding packet to backlog (len = %d)\n", dev->name, dlen); |
| adapter->rx_backlog.length[adapter->rx_backlog.in] = dlen; |
| adapter->rx_backlog.in = backlog_next(adapter->rx_backlog.in); |
| } else { |
| receive_packet(dev, dlen); |
| } |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: packet received\n", dev->name); |
| } |
| break; |
| |
| /* |
| * 82586 configured correctly |
| */ |
| case CMD_CONFIGURE_82586_RESPONSE: |
| adapter->got[CMD_CONFIGURE_82586] = 1; |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: interrupt - configure response received\n", dev->name); |
| break; |
| |
| /* |
| * Adapter memory configuration |
| */ |
| case CMD_CONFIGURE_ADAPTER_RESPONSE: |
| adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 1; |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: Adapter memory configuration %s.\n", dev->name, |
| adapter->irx_pcb.data.failed ? "failed" : "succeeded"); |
| break; |
| |
| /* |
| * Multicast list loading |
| */ |
| case CMD_LOAD_MULTICAST_RESPONSE: |
| adapter->got[CMD_LOAD_MULTICAST_LIST] = 1; |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: Multicast address list loading %s.\n", dev->name, |
| adapter->irx_pcb.data.failed ? "failed" : "succeeded"); |
| break; |
| |
| /* |
| * Station address setting |
| */ |
| case CMD_SET_ADDRESS_RESPONSE: |
| adapter->got[CMD_SET_STATION_ADDRESS] = 1; |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: Ethernet address setting %s.\n", dev->name, |
| adapter->irx_pcb.data.failed ? "failed" : "succeeded"); |
| break; |
| |
| |
| /* |
| * received board statistics |
| */ |
| case CMD_NETWORK_STATISTICS_RESPONSE: |
| adapter->stats.rx_packets += adapter->irx_pcb.data.netstat.tot_recv; |
| adapter->stats.tx_packets += adapter->irx_pcb.data.netstat.tot_xmit; |
| adapter->stats.rx_crc_errors += adapter->irx_pcb.data.netstat.err_CRC; |
| adapter->stats.rx_frame_errors += adapter->irx_pcb.data.netstat.err_align; |
| adapter->stats.rx_fifo_errors += adapter->irx_pcb.data.netstat.err_ovrrun; |
| adapter->stats.rx_over_errors += adapter->irx_pcb.data.netstat.err_res; |
| adapter->got[CMD_NETWORK_STATISTICS] = 1; |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: interrupt - statistics response received\n", dev->name); |
| break; |
| |
| /* |
| * sent a packet |
| */ |
| case CMD_TRANSMIT_PACKET_COMPLETE: |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: interrupt - packet sent\n", dev->name); |
| if (!netif_running(dev)) |
| break; |
| switch (adapter->irx_pcb.data.xmit_resp.c_stat) { |
| case 0xffff: |
| adapter->stats.tx_aborted_errors++; |
| printk(KERN_INFO "%s: transmit timed out, network cable problem?\n", dev->name); |
| break; |
| case 0xfffe: |
| adapter->stats.tx_fifo_errors++; |
| printk(KERN_INFO "%s: transmit timed out, FIFO underrun\n", dev->name); |
| break; |
| } |
| netif_wake_queue(dev); |
| break; |
| |
| /* |
| * some unknown PCB |
| */ |
| default: |
| printk(KERN_DEBUG "%s: unknown PCB received - %2.2x\n", dev->name, adapter->irx_pcb.command); |
| break; |
| } |
| } else { |
| printk(KERN_WARNING "%s: failed to read PCB on interrupt\n", dev->name); |
| adapter_reset(dev); |
| } |
| } |
| |
| } while (icount++ < 5 && (inb_status(dev->base_addr) & (ACRF | DONE))); |
| |
| prime_rx(dev); |
| |
| /* |
| * indicate no longer in interrupt routine |
| */ |
| spin_unlock(&adapter->lock); |
| return IRQ_HANDLED; |
| } |
| |
| |
| /****************************************************** |
| * |
| * open the board |
| * |
| ******************************************************/ |
| |
| static int elp_open(struct net_device *dev) |
| { |
| elp_device *adapter; |
| int retval; |
| |
| adapter = dev->priv; |
| |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: request to open device\n", dev->name); |
| |
| /* |
| * make sure we actually found the device |
| */ |
| if (adapter == NULL) { |
| printk(KERN_ERR "%s: Opening a non-existent physical device\n", dev->name); |
| return -EAGAIN; |
| } |
| /* |
| * disable interrupts on the board |
| */ |
| outb_control(0, dev); |
| |
| /* |
| * clear any pending interrupts |
| */ |
| inb_command(dev->base_addr); |
| adapter_reset(dev); |
| |
| /* |
| * no receive PCBs active |
| */ |
| adapter->rx_active = 0; |
| |
| adapter->busy = 0; |
| adapter->send_pcb_semaphore = 0; |
| adapter->rx_backlog.in = 0; |
| adapter->rx_backlog.out = 0; |
| |
| spin_lock_init(&adapter->lock); |
| |
| /* |
| * install our interrupt service routine |
| */ |
| if ((retval = request_irq(dev->irq, &elp_interrupt, 0, dev->name, dev))) { |
| printk(KERN_ERR "%s: could not allocate IRQ%d\n", dev->name, dev->irq); |
| return retval; |
| } |
| if ((retval = request_dma(dev->dma, dev->name))) { |
| free_irq(dev->irq, dev); |
| printk(KERN_ERR "%s: could not allocate DMA%d channel\n", dev->name, dev->dma); |
| return retval; |
| } |
| adapter->dma_buffer = (void *) dma_mem_alloc(DMA_BUFFER_SIZE); |
| if (!adapter->dma_buffer) { |
| printk(KERN_ERR "%s: could not allocate DMA buffer\n", dev->name); |
| free_dma(dev->dma); |
| free_irq(dev->irq, dev); |
| return -ENOMEM; |
| } |
| adapter->dmaing = 0; |
| |
| /* |
| * enable interrupts on the board |
| */ |
| outb_control(CMDE, dev); |
| |
| /* |
| * configure adapter memory: we need 10 multicast addresses, default==0 |
| */ |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: sending 3c505 memory configuration command\n", dev->name); |
| adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY; |
| adapter->tx_pcb.data.memconf.cmd_q = 10; |
| adapter->tx_pcb.data.memconf.rcv_q = 20; |
| adapter->tx_pcb.data.memconf.mcast = 10; |
| adapter->tx_pcb.data.memconf.frame = 20; |
| adapter->tx_pcb.data.memconf.rcv_b = 20; |
| adapter->tx_pcb.data.memconf.progs = 0; |
| adapter->tx_pcb.length = sizeof(struct Memconf); |
| adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 0; |
| if (!send_pcb(dev, &adapter->tx_pcb)) |
| printk(KERN_ERR "%s: couldn't send memory configuration command\n", dev->name); |
| else { |
| unsigned long timeout = jiffies + TIMEOUT; |
| while (adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] == 0 && time_before(jiffies, timeout)); |
| if (time_after_eq(jiffies, timeout)) |
| TIMEOUT_MSG(__LINE__); |
| } |
| |
| |
| /* |
| * configure adapter to receive broadcast messages and wait for response |
| */ |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: sending 82586 configure command\n", dev->name); |
| adapter->tx_pcb.command = CMD_CONFIGURE_82586; |
| adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD; |
| adapter->tx_pcb.length = 2; |
| adapter->got[CMD_CONFIGURE_82586] = 0; |
| if (!send_pcb(dev, &adapter->tx_pcb)) |
| printk(KERN_ERR "%s: couldn't send 82586 configure command\n", dev->name); |
| else { |
| unsigned long timeout = jiffies + TIMEOUT; |
| while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout)); |
| if (time_after_eq(jiffies, timeout)) |
| TIMEOUT_MSG(__LINE__); |
| } |
| |
| /* enable burst-mode DMA */ |
| /* outb(0x1, dev->base_addr + PORT_AUXDMA); */ |
| |
| /* |
| * queue receive commands to provide buffering |
| */ |
| prime_rx(dev); |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: %d receive PCBs active\n", dev->name, adapter->rx_active); |
| |
| /* |
| * device is now officially open! |
| */ |
| |
| netif_start_queue(dev); |
| return 0; |
| } |
| |
| |
| /****************************************************** |
| * |
| * send a packet to the adapter |
| * |
| ******************************************************/ |
| |
| static bool send_packet(struct net_device *dev, struct sk_buff *skb) |
| { |
| elp_device *adapter = dev->priv; |
| unsigned long target; |
| unsigned long flags; |
| |
| /* |
| * make sure the length is even and no shorter than 60 bytes |
| */ |
| unsigned int nlen = (((skb->len < 60) ? 60 : skb->len) + 1) & (~1); |
| |
| if (test_and_set_bit(0, (void *) &adapter->busy)) { |
| if (elp_debug >= 2) |
| printk(KERN_DEBUG "%s: transmit blocked\n", dev->name); |
| return false; |
| } |
| |
| adapter->stats.tx_bytes += nlen; |
| |
| /* |
| * send the adapter a transmit packet command. Ignore segment and offset |
| * and make sure the length is even |
| */ |
| adapter->tx_pcb.command = CMD_TRANSMIT_PACKET; |
| adapter->tx_pcb.length = sizeof(struct Xmit_pkt); |
| adapter->tx_pcb.data.xmit_pkt.buf_ofs |
| = adapter->tx_pcb.data.xmit_pkt.buf_seg = 0; /* Unused */ |
| adapter->tx_pcb.data.xmit_pkt.pkt_len = nlen; |
| |
| if (!send_pcb(dev, &adapter->tx_pcb)) { |
| adapter->busy = 0; |
| return false; |
| } |
| /* if this happens, we die */ |
| if (test_and_set_bit(0, (void *) &adapter->dmaing)) |
| printk(KERN_DEBUG "%s: tx: DMA %d in progress\n", dev->name, adapter->current_dma.direction); |
| |
| adapter->current_dma.direction = 1; |
| adapter->current_dma.start_time = jiffies; |
| |
| if ((unsigned long)(skb->data + nlen) >= MAX_DMA_ADDRESS || nlen != skb->len) { |
| skb_copy_from_linear_data(skb, adapter->dma_buffer, nlen); |
| memset(adapter->dma_buffer+skb->len, 0, nlen-skb->len); |
| target = isa_virt_to_bus(adapter->dma_buffer); |
| } |
| else { |
| target = isa_virt_to_bus(skb->data); |
| } |
| adapter->current_dma.skb = skb; |
| |
| flags=claim_dma_lock(); |
| disable_dma(dev->dma); |
| clear_dma_ff(dev->dma); |
| set_dma_mode(dev->dma, 0x48); /* dma memory -> io */ |
| set_dma_addr(dev->dma, target); |
| set_dma_count(dev->dma, nlen); |
| outb_control(adapter->hcr_val | DMAE | TCEN, dev); |
| enable_dma(dev->dma); |
| release_dma_lock(flags); |
| |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: DMA transfer started\n", dev->name); |
| |
| return true; |
| } |
| |
| /* |
| * The upper layer thinks we timed out |
| */ |
| |
| static void elp_timeout(struct net_device *dev) |
| { |
| elp_device *adapter = dev->priv; |
| int stat; |
| |
| stat = inb_status(dev->base_addr); |
| printk(KERN_WARNING "%s: transmit timed out, lost %s?\n", dev->name, (stat & ACRF) ? "interrupt" : "command"); |
| if (elp_debug >= 1) |
| printk(KERN_DEBUG "%s: status %#02x\n", dev->name, stat); |
| dev->trans_start = jiffies; |
| adapter->stats.tx_dropped++; |
| netif_wake_queue(dev); |
| } |
| |
| /****************************************************** |
| * |
| * start the transmitter |
| * return 0 if sent OK, else return 1 |
| * |
| ******************************************************/ |
| |
| static int elp_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| { |
| unsigned long flags; |
| elp_device *adapter = dev->priv; |
| |
| spin_lock_irqsave(&adapter->lock, flags); |
| check_3c505_dma(dev); |
| |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: request to send packet of length %d\n", dev->name, (int) skb->len); |
| |
| netif_stop_queue(dev); |
| |
| /* |
| * send the packet at skb->data for skb->len |
| */ |
| if (!send_packet(dev, skb)) { |
| if (elp_debug >= 2) { |
| printk(KERN_DEBUG "%s: failed to transmit packet\n", dev->name); |
| } |
| spin_unlock_irqrestore(&adapter->lock, flags); |
| return 1; |
| } |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: packet of length %d sent\n", dev->name, (int) skb->len); |
| |
| /* |
| * start the transmit timeout |
| */ |
| dev->trans_start = jiffies; |
| |
| prime_rx(dev); |
| spin_unlock_irqrestore(&adapter->lock, flags); |
| netif_start_queue(dev); |
| return 0; |
| } |
| |
| /****************************************************** |
| * |
| * return statistics on the board |
| * |
| ******************************************************/ |
| |
| static struct net_device_stats *elp_get_stats(struct net_device *dev) |
| { |
| elp_device *adapter = (elp_device *) dev->priv; |
| |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: request for stats\n", dev->name); |
| |
| /* If the device is closed, just return the latest stats we have, |
| - we cannot ask from the adapter without interrupts */ |
| if (!netif_running(dev)) |
| return &adapter->stats; |
| |
| /* send a get statistics command to the board */ |
| adapter->tx_pcb.command = CMD_NETWORK_STATISTICS; |
| adapter->tx_pcb.length = 0; |
| adapter->got[CMD_NETWORK_STATISTICS] = 0; |
| if (!send_pcb(dev, &adapter->tx_pcb)) |
| printk(KERN_ERR "%s: couldn't send get statistics command\n", dev->name); |
| else { |
| unsigned long timeout = jiffies + TIMEOUT; |
| while (adapter->got[CMD_NETWORK_STATISTICS] == 0 && time_before(jiffies, timeout)); |
| if (time_after_eq(jiffies, timeout)) { |
| TIMEOUT_MSG(__LINE__); |
| return &adapter->stats; |
| } |
| } |
| |
| /* statistics are now up to date */ |
| return &adapter->stats; |
| } |
| |
| |
| static void netdev_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *info) |
| { |
| strcpy(info->driver, DRV_NAME); |
| strcpy(info->version, DRV_VERSION); |
| sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr); |
| } |
| |
| static u32 netdev_get_msglevel(struct net_device *dev) |
| { |
| return debug; |
| } |
| |
| static void netdev_set_msglevel(struct net_device *dev, u32 level) |
| { |
| debug = level; |
| } |
| |
| static const struct ethtool_ops netdev_ethtool_ops = { |
| .get_drvinfo = netdev_get_drvinfo, |
| .get_msglevel = netdev_get_msglevel, |
| .set_msglevel = netdev_set_msglevel, |
| }; |
| |
| /****************************************************** |
| * |
| * close the board |
| * |
| ******************************************************/ |
| |
| static int elp_close(struct net_device *dev) |
| { |
| elp_device *adapter; |
| |
| adapter = dev->priv; |
| |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: request to close device\n", dev->name); |
| |
| netif_stop_queue(dev); |
| |
| /* Someone may request the device statistic information even when |
| * the interface is closed. The following will update the statistics |
| * structure in the driver, so we'll be able to give current statistics. |
| */ |
| (void) elp_get_stats(dev); |
| |
| /* |
| * disable interrupts on the board |
| */ |
| outb_control(0, dev); |
| |
| /* |
| * release the IRQ |
| */ |
| free_irq(dev->irq, dev); |
| |
| free_dma(dev->dma); |
| free_pages((unsigned long) adapter->dma_buffer, get_order(DMA_BUFFER_SIZE)); |
| |
| return 0; |
| } |
| |
| |
| /************************************************************ |
| * |
| * Set multicast list |
| * num_addrs==0: clear mc_list |
| * num_addrs==-1: set promiscuous mode |
| * num_addrs>0: set mc_list |
| * |
| ************************************************************/ |
| |
| static void elp_set_mc_list(struct net_device *dev) |
| { |
| elp_device *adapter = (elp_device *) dev->priv; |
| struct dev_mc_list *dmi = dev->mc_list; |
| int i; |
| unsigned long flags; |
| |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: request to set multicast list\n", dev->name); |
| |
| spin_lock_irqsave(&adapter->lock, flags); |
| |
| if (!(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) { |
| /* send a "load multicast list" command to the board, max 10 addrs/cmd */ |
| /* if num_addrs==0 the list will be cleared */ |
| adapter->tx_pcb.command = CMD_LOAD_MULTICAST_LIST; |
| adapter->tx_pcb.length = 6 * dev->mc_count; |
| for (i = 0; i < dev->mc_count; i++) { |
| memcpy(adapter->tx_pcb.data.multicast[i], dmi->dmi_addr, 6); |
| dmi = dmi->next; |
| } |
| adapter->got[CMD_LOAD_MULTICAST_LIST] = 0; |
| if (!send_pcb(dev, &adapter->tx_pcb)) |
| printk(KERN_ERR "%s: couldn't send set_multicast command\n", dev->name); |
| else { |
| unsigned long timeout = jiffies + TIMEOUT; |
| while (adapter->got[CMD_LOAD_MULTICAST_LIST] == 0 && time_before(jiffies, timeout)); |
| if (time_after_eq(jiffies, timeout)) { |
| TIMEOUT_MSG(__LINE__); |
| } |
| } |
| if (dev->mc_count) |
| adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD | RECV_MULTI; |
| else /* num_addrs == 0 */ |
| adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD; |
| } else |
| adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_PROMISC; |
| /* |
| * configure adapter to receive messages (as specified above) |
| * and wait for response |
| */ |
| if (elp_debug >= 3) |
| printk(KERN_DEBUG "%s: sending 82586 configure command\n", dev->name); |
| adapter->tx_pcb.command = CMD_CONFIGURE_82586; |
| adapter->tx_pcb.length = 2; |
| adapter->got[CMD_CONFIGURE_82586] = 0; |
| if (!send_pcb(dev, &adapter->tx_pcb)) |
| { |
| spin_unlock_irqrestore(&adapter->lock, flags); |
| printk(KERN_ERR "%s: couldn't send 82586 configure command\n", dev->name); |
| } |
| else { |
| unsigned long timeout = jiffies + TIMEOUT; |
| spin_unlock_irqrestore(&adapter->lock, flags); |
| while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout)); |
| if (time_after_eq(jiffies, timeout)) |
| TIMEOUT_MSG(__LINE__); |
| } |
| } |
| |
| /************************************************************ |
| * |
| * A couple of tests to see if there's 3C505 or not |
| * Called only by elp_autodetect |
| ************************************************************/ |
| |
| static int __init elp_sense(struct net_device *dev) |
| { |
| int addr = dev->base_addr; |
| const char *name = dev->name; |
| byte orig_HSR; |
| |
| if (!request_region(addr, ELP_IO_EXTENT, "3c505")) |
| return -ENODEV; |
| |
| orig_HSR = inb_status(addr); |
| |
| if (elp_debug > 0) |
| printk(search_msg, name, addr); |
| |
| if (orig_HSR == 0xff) { |
| if (elp_debug > 0) |
| printk(notfound_msg, 1); |
| goto out; |
| } |
| |
| /* Wait for a while; the adapter may still be booting up */ |
| if (elp_debug > 0) |
| printk(stilllooking_msg); |
| |
| if (orig_HSR & DIR) { |
| /* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */ |
| outb(0, dev->base_addr + PORT_CONTROL); |
| msleep(300); |
| if (inb_status(addr) & DIR) { |
| if (elp_debug > 0) |
| printk(notfound_msg, 2); |
| goto out; |
| } |
| } else { |
| /* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */ |
| outb(DIR, dev->base_addr + PORT_CONTROL); |
| msleep(300); |
| if (!(inb_status(addr) & DIR)) { |
| if (elp_debug > 0) |
| printk(notfound_msg, 3); |
| goto out; |
| } |
| } |
| /* |
| * It certainly looks like a 3c505. |
| */ |
| if (elp_debug > 0) |
| printk(found_msg); |
| |
| return 0; |
| out: |
| release_region(addr, ELP_IO_EXTENT); |
| return -ENODEV; |
| } |
| |
| /************************************************************* |
| * |
| * Search through addr_list[] and try to find a 3C505 |
| * Called only by eplus_probe |
| *************************************************************/ |
| |
| static int __init elp_autodetect(struct net_device *dev) |
| { |
| int idx = 0; |
| |
| /* if base address set, then only check that address |
| otherwise, run through the table */ |
| if (dev->base_addr != 0) { /* dev->base_addr == 0 ==> plain autodetect */ |
| if (elp_sense(dev) == 0) |
| return dev->base_addr; |
| } else |
| while ((dev->base_addr = addr_list[idx++])) { |
| if (elp_sense(dev) == 0) |
| return dev->base_addr; |
| } |
| |
| /* could not find an adapter */ |
| if (elp_debug > 0) |
| printk(couldnot_msg, dev->name); |
| |
| return 0; /* Because of this, the layer above will return -ENODEV */ |
| } |
| |
| |
| /****************************************************** |
| * |
| * probe for an Etherlink Plus board at the specified address |
| * |
| ******************************************************/ |
| |
| /* There are three situations we need to be able to detect here: |
| |
| * a) the card is idle |
| * b) the card is still booting up |
| * c) the card is stuck in a strange state (some DOS drivers do this) |
| * |
| * In case (a), all is well. In case (b), we wait 10 seconds to see if the |
| * card finishes booting, and carry on if so. In case (c), we do a hard reset, |
| * loop round, and hope for the best. |
| * |
| * This is all very unpleasant, but hopefully avoids the problems with the old |
| * probe code (which had a 15-second delay if the card was idle, and didn't |
| * work at all if it was in a weird state). |
| */ |
| |
| static int __init elplus_setup(struct net_device *dev) |
| { |
| elp_device *adapter = dev->priv; |
| int i, tries, tries1, okay; |
| unsigned long timeout; |
| unsigned long cookie = 0; |
| int err = -ENODEV; |
| |
| /* |
| * setup adapter structure |
| */ |
| |
| dev->base_addr = elp_autodetect(dev); |
| if (!dev->base_addr) |
| return -ENODEV; |
| |
| adapter->send_pcb_semaphore = 0; |
| |
| for (tries1 = 0; tries1 < 3; tries1++) { |
| outb_control((adapter->hcr_val | CMDE) & ~DIR, dev); |
| /* First try to write just one byte, to see if the card is |
| * responding at all normally. |
| */ |
| timeout = jiffies + 5*HZ/100; |
| okay = 0; |
| while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE)); |
| if ((inb_status(dev->base_addr) & HCRE)) { |
| outb_command(0, dev->base_addr); /* send a spurious byte */ |
| timeout = jiffies + 5*HZ/100; |
| while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE)); |
| if (inb_status(dev->base_addr) & HCRE) |
| okay = 1; |
| } |
| if (!okay) { |
| /* Nope, it's ignoring the command register. This means that |
| * either it's still booting up, or it's died. |
| */ |
| printk(KERN_ERR "%s: command register wouldn't drain, ", dev->name); |
| if ((inb_status(dev->base_addr) & 7) == 3) { |
| /* If the adapter status is 3, it *could* still be booting. |
| * Give it the benefit of the doubt for 10 seconds. |
| */ |
| printk("assuming 3c505 still starting\n"); |
| timeout = jiffies + 10*HZ; |
| while (time_before(jiffies, timeout) && (inb_status(dev->base_addr) & 7)); |
| if (inb_status(dev->base_addr) & 7) { |
| printk(KERN_ERR "%s: 3c505 failed to start\n", dev->name); |
| } else { |
| okay = 1; /* It started */ |
| } |
| } else { |
| /* Otherwise, it must just be in a strange |
| * state. We probably need to kick it. |
| */ |
| printk("3c505 is sulking\n"); |
| } |
| } |
| for (tries = 0; tries < 5 && okay; tries++) { |
| |
| /* |
| * Try to set the Ethernet address, to make sure that the board |
| * is working. |
| */ |
| adapter->tx_pcb.command = CMD_STATION_ADDRESS; |
| adapter->tx_pcb.length = 0; |
| cookie = probe_irq_on(); |
| if (!send_pcb(dev, &adapter->tx_pcb)) { |
| printk(KERN_ERR "%s: could not send first PCB\n", dev->name); |
| probe_irq_off(cookie); |
| continue; |
| } |
| if (!receive_pcb(dev, &adapter->rx_pcb)) { |
| printk(KERN_ERR "%s: could not read first PCB\n", dev->name); |
| probe_irq_off(cookie); |
| continue; |
| } |
| if ((adapter->rx_pcb.command != CMD_ADDRESS_RESPONSE) || |
| (adapter->rx_pcb.length != 6)) { |
| printk(KERN_ERR "%s: first PCB wrong (%d, %d)\n", dev->name, adapter->rx_pcb.command, adapter->rx_pcb.length); |
| probe_irq_off(cookie); |
| continue; |
| } |
| goto okay; |
| } |
| /* It's broken. Do a hard reset to re-initialise the board, |
| * and try again. |
| */ |
| printk(KERN_INFO "%s: resetting adapter\n", dev->name); |
| outb_control(adapter->hcr_val | FLSH | ATTN, dev); |
| outb_control(adapter->hcr_val & ~(FLSH | ATTN), dev); |
| } |
| printk(KERN_ERR "%s: failed to initialise 3c505\n", dev->name); |
| goto out; |
| |
| okay: |
| if (dev->irq) { /* Is there a preset IRQ? */ |
| int rpt = probe_irq_off(cookie); |
| if (dev->irq != rpt) { |
| printk(KERN_WARNING "%s: warning, irq %d configured but %d detected\n", dev->name, dev->irq, rpt); |
| } |
| /* if dev->irq == probe_irq_off(cookie), all is well */ |
| } else /* No preset IRQ; just use what we can detect */ |
| dev->irq = probe_irq_off(cookie); |
| switch (dev->irq) { /* Legal, sane? */ |
| case 0: |
| printk(KERN_ERR "%s: IRQ probe failed: check 3c505 jumpers.\n", |
| dev->name); |
| goto out; |
| case 1: |
| case 6: |
| case 8: |
| case 13: |
| printk(KERN_ERR "%s: Impossible IRQ %d reported by probe_irq_off().\n", |
| dev->name, dev->irq); |
| goto out; |
| } |
| /* |
| * Now we have the IRQ number so we can disable the interrupts from |
| * the board until the board is opened. |
| */ |
| outb_control(adapter->hcr_val & ~CMDE, dev); |
| |
| /* |
| * copy Ethernet address into structure |
| */ |
| for (i = 0; i < 6; i++) |
| dev->dev_addr[i] = adapter->rx_pcb.data.eth_addr[i]; |
| |
| /* find a DMA channel */ |
| if (!dev->dma) { |
| if (dev->mem_start) { |
| dev->dma = dev->mem_start & 7; |
| } |
| else { |
| printk(KERN_WARNING "%s: warning, DMA channel not specified, using default\n", dev->name); |
| dev->dma = ELP_DMA; |
| } |
| } |
| |
| /* |
| * print remainder of startup message |
| */ |
| printk(KERN_INFO "%s: 3c505 at %#lx, irq %d, dma %d, ", |
| dev->name, dev->base_addr, dev->irq, dev->dma); |
| printk("addr %02x:%02x:%02x:%02x:%02x:%02x, ", |
| dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], |
| dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); |
| |
| /* |
| * read more information from the adapter |
| */ |
| |
| adapter->tx_pcb.command = CMD_ADAPTER_INFO; |
| adapter->tx_pcb.length = 0; |
| if (!send_pcb(dev, &adapter->tx_pcb) || |
| !receive_pcb(dev, &adapter->rx_pcb) || |
| (adapter->rx_pcb.command != CMD_ADAPTER_INFO_RESPONSE) || |
| (adapter->rx_pcb.length != 10)) { |
| printk("not responding to second PCB\n"); |
| } |
| printk("rev %d.%d, %dk\n", adapter->rx_pcb.data.info.major_vers, adapter->rx_pcb.data.info.minor_vers, adapter->rx_pcb.data.info.RAM_sz); |
| |
| /* |
| * reconfigure the adapter memory to better suit our purposes |
| */ |
| adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY; |
| adapter->tx_pcb.length = 12; |
| adapter->tx_pcb.data.memconf.cmd_q = 8; |
| adapter->tx_pcb.data.memconf.rcv_q = 8; |
| adapter->tx_pcb.data.memconf.mcast = 10; |
| adapter->tx_pcb.data.memconf.frame = 10; |
| adapter->tx_pcb.data.memconf.rcv_b = 10; |
| adapter->tx_pcb.data.memconf.progs = 0; |
| if (!send_pcb(dev, &adapter->tx_pcb) || |
| !receive_pcb(dev, &adapter->rx_pcb) || |
| (adapter->rx_pcb.command != CMD_CONFIGURE_ADAPTER_RESPONSE) || |
| (adapter->rx_pcb.length != 2)) { |
| printk(KERN_ERR "%s: could not configure adapter memory\n", dev->name); |
| } |
| if (adapter->rx_pcb.data.configure) { |
| printk(KERN_ERR "%s: adapter configuration failed\n", dev->name); |
| } |
| |
| dev->open = elp_open; /* local */ |
| dev->stop = elp_close; /* local */ |
| dev->get_stats = elp_get_stats; /* local */ |
| dev->hard_start_xmit = elp_start_xmit; /* local */ |
| dev->tx_timeout = elp_timeout; /* local */ |
| dev->watchdog_timeo = 10*HZ; |
| dev->set_multicast_list = elp_set_mc_list; /* local */ |
| dev->ethtool_ops = &netdev_ethtool_ops; /* local */ |
| |
| memset(&(adapter->stats), 0, sizeof(struct net_device_stats)); |
| dev->mem_start = dev->mem_end = 0; |
| |
| err = register_netdev(dev); |
| if (err) |
| goto out; |
| |
| return 0; |
| out: |
| release_region(dev->base_addr, ELP_IO_EXTENT); |
| return err; |
| } |
| |
| #ifndef MODULE |
| struct net_device * __init elplus_probe(int unit) |
| { |
| struct net_device *dev = alloc_etherdev(sizeof(elp_device)); |
| int err; |
| if (!dev) |
| return ERR_PTR(-ENOMEM); |
| |
| sprintf(dev->name, "eth%d", unit); |
| netdev_boot_setup_check(dev); |
| |
| err = elplus_setup(dev); |
| if (err) { |
| free_netdev(dev); |
| return ERR_PTR(err); |
| } |
| return dev; |
| } |
| |
| #else |
| static struct net_device *dev_3c505[ELP_MAX_CARDS]; |
| static int io[ELP_MAX_CARDS]; |
| static int irq[ELP_MAX_CARDS]; |
| static int dma[ELP_MAX_CARDS]; |
| module_param_array(io, int, NULL, 0); |
| module_param_array(irq, int, NULL, 0); |
| module_param_array(dma, int, NULL, 0); |
| MODULE_PARM_DESC(io, "EtherLink Plus I/O base address(es)"); |
| MODULE_PARM_DESC(irq, "EtherLink Plus IRQ number(s) (assigned)"); |
| MODULE_PARM_DESC(dma, "EtherLink Plus DMA channel(s)"); |
| |
| int __init init_module(void) |
| { |
| int this_dev, found = 0; |
| |
| for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) { |
| struct net_device *dev = alloc_etherdev(sizeof(elp_device)); |
| if (!dev) |
| break; |
| |
| dev->irq = irq[this_dev]; |
| dev->base_addr = io[this_dev]; |
| if (dma[this_dev]) { |
| dev->dma = dma[this_dev]; |
| } else { |
| dev->dma = ELP_DMA; |
| printk(KERN_WARNING "3c505.c: warning, using default DMA channel,\n"); |
| } |
| if (io[this_dev] == 0) { |
| if (this_dev) { |
| free_netdev(dev); |
| break; |
| } |
| printk(KERN_NOTICE "3c505.c: module autoprobe not recommended, give io=xx.\n"); |
| } |
| if (elplus_setup(dev) != 0) { |
| printk(KERN_WARNING "3c505.c: Failed to register card at 0x%x.\n", io[this_dev]); |
| free_netdev(dev); |
| break; |
| } |
| dev_3c505[this_dev] = dev; |
| found++; |
| } |
| if (!found) |
| return -ENODEV; |
| return 0; |
| } |
| |
| void __exit cleanup_module(void) |
| { |
| int this_dev; |
| |
| for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) { |
| struct net_device *dev = dev_3c505[this_dev]; |
| if (dev) { |
| unregister_netdev(dev); |
| release_region(dev->base_addr, ELP_IO_EXTENT); |
| free_netdev(dev); |
| } |
| } |
| } |
| |
| #endif /* MODULE */ |
| MODULE_LICENSE("GPL"); |