From 86297c41a26f18d924e64fc93321c59cbc4c48dd Mon Sep 17 00:00:00 2001 From: Thomas Bushnell Date: Mon, 26 Apr 1999 05:58:44 +0000 Subject: 1998-11-30 OKUJI Yoshinori Clean up linux emulation code to make it architecture-independent as much as possible. * linux: Renamed from linuxdev. * Makefile.in (objfiles): Add linux.o instead of linuxdev.o. (MAKE): New variable. Used for the linux.o target. * configure.in: Add AC_CHECK_TOOL(MAKE, make). * i386/i386/spl.h: Include , for compatibility with OSF Mach 3.0. Suggested by Elgin Lee . * linux/src: Renamed from linux/linux. * linux/dev: Renamed from linux/mach. * linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h, instead of mach/include/linux/autoconf.h. * Makefile.in (all): Target ../linux.o instead of ../linuxdev.o. * linux/dev/drivers/block/genhd.c: Include instead of . * linux/dev/drivers/net/auto_irq.c: Remove unneeded header files, and . * linux/dev/init/main.c: Many i386-dependent codes moved to ... * linux/dev/arch/i386/irq.c: ... here. * linux/dev/arch/i386/setup.c: New file. * linux/dev/arch/i386/linux_emul.h: Likewise. * linux/dev/arch/i386/glue/timer.c: Merged into sched.c. * linux/dev/arch/i386/glue/sched.c: Include instead of , and moved to ... * linux/dev/kernel/sched.c: ... here. * linux/dev/arch/i386/glue/block.c: Include and , instead of i386-dependent header files, and moved to ... * linux/dev/glue/blocl.c: ... here. * linux/dev/arch/i386/glue/net.c: Include and , instead of i386-dependent header files, and moved to ... * linux/dev/glue/net.c: ... here. * linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ... * linux/dev/glue/misc.c: ... here. * linux/dev/arch/i386/glue/kmem.c: Moved to ... * linux/dev/glue/kmem.c: ... here. --- linux/src/drivers/net/3c505.c | 1732 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1732 insertions(+) create mode 100644 linux/src/drivers/net/3c505.c (limited to 'linux/src/drivers/net/3c505.c') diff --git a/linux/src/drivers/net/3c505.c b/linux/src/drivers/net/3c505.c new file mode 100644 index 0000000..b2163ec --- /dev/null +++ b/linux/src/drivers/net/3c505.c @@ -0,0 +1,1732 @@ +/* + * 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 1.1 1999/04/26 05:51:48 tb Exp $ + * + * Authors: Linux 3c505 device driver by + * Craig Southeren, + * Final debugging by + * Andrew Tridgell, + * Auto irq/address, tuning, cleanup and v1.1.4+ kernel mods by + * Juha Laiho, + * Linux 3C509 driver by + * Donald Becker, + * 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 + * More debugging and DMA version by Philip Blundell + */ + +/* 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. + * + * 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 will not work with revision 2 hardware, because the host + * control register is write-only. It should be fairly easy to arrange to + * keep our own soft-copy of the intended contents of this register, if + * somebody has the time. There may be firmware differences that cause + * other problems, though, and I don't have an old card to test. + */ + +/* 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 + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "3c505.h" + +#define ELP_DMA 6 /* DMA channel to use */ +#define ELP_RX_PCBS 4 + +/********************************************************* + * + * 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 const char *search_msg = "%s: Looking for 3c505 adapter at address %#x..."; + +static const char *stilllooking_msg = "still looking..."; + +static const char *found_msg = "found.\n"; + +static const char *notfound_msg = "not found (reason = %d)\n"; + +static const char *couldnot_msg = "%s: 3c505 not found\n"; + +/********************************************************* + * + * various other debug stuff + * + *********************************************************/ + +#ifdef ELP_DEBUG +static const int elp_debug = ELP_DEBUG; +#else +static const int elp_debug = 0; +#endif + +/* + * 0 = no messages (well, some) + * 1 = messages when high level commands performed + * 2 = messages when low level commands performed + * 3 = messages when interrupts received + */ + +/***************************************************************** + * + * useful macros + * + *****************************************************************/ + +#ifndef TRUE +#define TRUE 1 +#endif + +#ifndef FALSE +#define FALSE 0 +#endif + + +/***************************************************************** + * + * List of I/O-addresses we try to auto-sense + * Last element MUST BE 0! + *****************************************************************/ + +const int addr_list[] = {0x300, 0x280, 0x310, 0}; + +/* Dma Memory related stuff */ + +/* Pure 2^n version of get_order */ +static inline int __get_order(unsigned long size) +{ + int order; + + size = (size - 1) >> (PAGE_SHIFT - 1); + order = -1; + do { + size >>= 1; + order++; + } while (size); + return order; +} + +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 unsigned char inb_control(unsigned int base_addr) +{ + return inb(base_addr + PORT_CONTROL); +} + +static inline int inb_command(unsigned int base_addr) +{ + return inb(base_addr + PORT_COMMAND); +} + +static inline void outb_control(unsigned char val, unsigned int base_addr) +{ + outb(val, base_addr + PORT_CONTROL); +} + +static inline void outb_command(unsigned char val, unsigned int base_addr) +{ + outb(val, base_addr + PORT_COMMAND); +} + +static inline unsigned int inw_data(unsigned int base_addr) +{ + return inw(base_addr + PORT_DATA); +} + +static inline void outw_data(unsigned int val, unsigned int base_addr) +{ + outw(val, base_addr + PORT_DATA); +} + + +/***************************************************************** + * + * structure to hold context information for adapter + * + *****************************************************************/ + +#define DMA_BUFFER_SIZE 1600 +#define BACKLOG_SIZE 4 + +typedef struct { + volatile short got[NUM_TRANSMIT_CMDS]; /* flags for command completion */ + pcb_struct tx_pcb; /* PCB for foreground sending */ + pcb_struct rx_pcb; /* PCB for foreground receiving */ + pcb_struct itx_pcb; /* PCB for background sending */ + pcb_struct irx_pcb; /* PCB for background receiving */ + struct enet_statistics stats; + + void *dma_buffer; + + struct { + unsigned int length[BACKLOG_SIZE]; + unsigned int in; + unsigned int out; + } rx_backlog; + + struct { + unsigned int direction; + unsigned int length; + unsigned int copy_flag; + struct sk_buff *skb; + long int start_time; + } current_dma; + + /* flags */ + unsigned long send_pcb_semaphore; + unsigned int dmaing; + unsigned long busy; + + unsigned int rx_active; /* number of receive PCBs */ +} elp_device; + +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) +{ + int timeout = jiffies + 10; + register int stat1; + do { + stat1 = inb_status(base_addr); + } while (stat1 != inb_status(base_addr) && jiffies < timeout); + if (jiffies >= timeout) + TIMEOUT_MSG(__LINE__); + return stat1; +} + +static inline void set_hsf(unsigned int base_addr, int hsf) +{ + cli(); + outb_control((inb_control(base_addr) & ~HSF_PCB_MASK) | hsf, base_addr); + sti(); +} + +static int start_receive(struct device *, pcb_struct *); + +inline static void adapter_reset(struct device *dev) +{ + int timeout; + unsigned char orig_hcr = inb_control(dev->base_addr); + + elp_device *adapter = dev->priv; + + outb_control(0, dev->base_addr); + + if (inb_status(dev->base_addr) & ACRF) { + do { + inb_command(dev->base_addr); + timeout = jiffies + 2; + while ((jiffies <= timeout) && !(inb_status(dev->base_addr) & ACRF)); + } while (inb_status(dev->base_addr) & ACRF); + set_hsf(dev->base_addr, HSF_PCB_NAK); + } + outb_control(inb_control(dev->base_addr) | ATTN | DIR, dev->base_addr); + timeout = jiffies + 1; + while (jiffies <= timeout); + outb_control(inb_control(dev->base_addr) & ~ATTN, dev->base_addr); + timeout = jiffies + 1; + while (jiffies <= timeout); + outb_control(inb_control(dev->base_addr) | FLSH, dev->base_addr); + timeout = jiffies + 1; + while (jiffies <= timeout); + outb_control(inb_control(dev->base_addr) & ~FLSH, dev->base_addr); + timeout = jiffies + 1; + while (jiffies <= timeout); + + outb_control(orig_hcr, dev->base_addr); + if (!start_receive(dev, &adapter->tx_pcb)) + printk("%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_dma(struct device *dev) +{ + elp_device *adapter = dev->priv; + if (adapter->dmaing && (jiffies > (adapter->current_dma.start_time + 10))) { + unsigned long flags; + printk("%s: DMA %s timed out, %d bytes left\n", dev->name, adapter->current_dma.direction ? "download" : "upload", get_dma_residue(dev->dma)); + save_flags(flags); + cli(); + adapter->dmaing = 0; + adapter->busy = 0; + disable_dma(dev->dma); + if (adapter->rx_active) + adapter->rx_active--; + outb_control(inb_control(dev->base_addr) & ~(DMAE | TCEN | DIR), dev->base_addr); + restore_flags(flags); + } +} + +/* Primitive functions used by send_pcb() */ +static inline unsigned int send_pcb_slow(unsigned int base_addr, unsigned char byte) +{ + unsigned int timeout; + outb_command(byte, base_addr); + for (timeout = jiffies + 5; jiffies < timeout;) { + if (inb_status(base_addr) & HCRE) + return FALSE; + } + printk("3c505: send_pcb_slow timed out\n"); + return TRUE; +} + +static inline unsigned int 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("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 device *dev) +{ + elp_device *adapter = dev->priv; + while (adapter->rx_active < ELP_RX_PCBS && dev->start) { + 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 int send_pcb(struct device *dev, pcb_struct * pcb) +{ + int i; + int timeout; + elp_device *adapter = dev->priv; + + check_dma(dev); + + if (adapter->dmaing && adapter->current_dma.direction == 0) + return FALSE; + + /* Avoid contention */ + if (set_bit(1, &adapter->send_pcb_semaphore)) { + if (elp_debug >= 3) { + printk("%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->base_addr, 0); + + if (send_pcb_slow(dev->base_addr, pcb->command)) + goto abort; + + cli(); + + 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(inb_control(dev->base_addr) | 3, dev->base_addr); /* signal end of PCB */ + outb_command(2 + pcb->length, dev->base_addr); + + /* now wait for the acknowledgement */ + sti(); + + for (timeout = jiffies + 5; jiffies < timeout;) { + switch (GET_ASF(dev->base_addr)) { + case ASF_PCB_ACK: + adapter->send_pcb_semaphore = 0; + return TRUE; + break; + case ASF_PCB_NAK: + printk("%s: send_pcb got NAK\n", dev->name); + goto abort; + break; + } + } + + if (elp_debug >= 1) + printk("%s: timeout waiting for PCB acknowledge (status %02x)\n", dev->name, inb_status(dev->base_addr)); + + sti_abort: + sti(); + 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 int receive_pcb(struct device *dev, pcb_struct * pcb) +{ + int i, j; + int total_length; + int stat; + int timeout; + + elp_device *adapter = dev->priv; + + set_hsf(dev->base_addr, 0); + + /* get the command code */ + timeout = jiffies + 2; + while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && jiffies < timeout); + if (jiffies >= timeout) { + TIMEOUT_MSG(__LINE__); + return FALSE; + } + pcb->command = inb_command(dev->base_addr); + + /* read the data length */ + timeout = jiffies + 3; + while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && jiffies < timeout); + if (jiffies >= timeout) { + TIMEOUT_MSG(__LINE__); + printk("%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 */ + cli(); + 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); + sti(); + 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("%s: mangled PCB received\n", dev->name); + set_hsf(dev->base_addr, HSF_PCB_NAK); + return FALSE; + } + + if (pcb->command == CMD_RECEIVE_PACKET_COMPLETE) { + if (set_bit(0, (void *) &adapter->busy)) { + if (backlog_next(adapter->rx_backlog.in) == adapter->rx_backlog.out) { + set_hsf(dev->base_addr, HSF_PCB_NAK); + printk("%s: PCB rejected, transfer in progress and backlog full\n", dev->name); + pcb->command = 0; + return TRUE; + } else { + pcb->command = 0xff; + } + } + } + set_hsf(dev->base_addr, HSF_PCB_ACK); + return TRUE; +} + +/****************************************************** + * + * queue a receive command on the adapter so we will get an + * interrupt when a packet is received. + * + ******************************************************/ + +static int start_receive(struct device *dev, pcb_struct * tx_pcb) +{ + int status; + elp_device *adapter = dev->priv; + + if (elp_debug >= 3) + printk("%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 device *dev, int len) +{ + int rlen; + elp_device *adapter = dev->priv; + unsigned long target; + struct sk_buff *skb; + + rlen = (len + 1) & ~1; + skb = dev_alloc_skb(rlen + 2); + + adapter->current_dma.copy_flag = 0; + + if (!skb) { + printk("%s: memory squeeze, dropping packet\n", dev->name); + target = virt_to_bus(adapter->dma_buffer); + } else { + skb_reserve(skb, 2); + target = virt_to_bus(skb_put(skb, rlen)); + if ((target + rlen) >= MAX_DMA_ADDRESS) { + target = virt_to_bus(adapter->dma_buffer); + adapter->current_dma.copy_flag = 1; + } + } + /* if this happens, we die */ + if (set_bit(0, (void *) &adapter->dmaing)) + printk("%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(inb_control(dev->base_addr) | DIR | TCEN | DMAE, dev->base_addr); + + disable_dma(dev->dma); + clear_dma_ff(dev->dma); + set_dma_mode(dev->dma, 0x04); /* dma read */ + set_dma_addr(dev->dma, target); + set_dma_count(dev->dma, rlen); + enable_dma(dev->dma); + + if (elp_debug >= 3) { + printk("%s: rx DMA transfer started\n", dev->name); + } + if (adapter->rx_active) + adapter->rx_active--; + + if (!adapter->busy) + printk("%s: receive_packet called, busy not set.\n", dev->name); +} + +/****************************************************** + * + * interrupt handler + * + ******************************************************/ + +static void elp_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr) +{ + int len; + int dlen; + int icount = 0; + struct device *dev; + elp_device *adapter; + int timeout; + + if (irq < 0 || irq > 15) { + printk("elp_interrupt(): illegal IRQ number found in interrupt routine (%i)\n", irq); + return; + } + dev = irq2dev_map[irq]; + + if (dev == NULL) { + printk("elp_interrupt(): irq %d for unknown device.\n", irq); + return; + } + adapter = (elp_device *) dev->priv; + + if (dev->interrupt) { + printk("%s: re-entering the interrupt handler!\n", dev->name); + return; + } + dev->interrupt = 1; + + do { + /* + * has a DMA transfer finished? + */ + if (inb_status(dev->base_addr) & DONE) { + if (!adapter->dmaing) { + printk("%s: phantom DMA completed\n", dev->name); + } + if (elp_debug >= 3) { + printk("%s: %s DMA complete, status %02x\n", dev->name, adapter->current_dma.direction ? "tx" : "rx", inb_status(dev->base_addr)); + } + + outb_control(inb_control(dev->base_addr) & ~(DMAE | TCEN | DIR), dev->base_addr); + if (adapter->current_dma.direction) { + dev_kfree_skb(adapter->current_dma.skb, FREE_WRITE); + } else { + struct sk_buff *skb = adapter->current_dma.skb; + if (skb) { + skb->dev = dev; + if (adapter->current_dma.copy_flag) { + memcpy(skb_put(skb, adapter->current_dma.length), adapter->dma_buffer, adapter->current_dma.length); + } + skb->protocol = eth_type_trans(skb,dev); + netif_rx(skb); + } + } + 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("%s: receiving backlogged packet (%d)\n", dev->name, t); + receive_packet(dev, t); + } else { + adapter->busy = 0; + } + } else { + /* has one timed out? */ + check_dma(dev); + } + + sti(); + + /* + * receive a PCB from the adapter + */ + timeout = jiffies + 3; + while ((inb_status(dev->base_addr) & ACRF) != 0 && 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 (dev->start == 0) + break; + cli(); + 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("%s: interrupt - packet not received correctly\n", dev->name); + sti(); + } else { + if (elp_debug >= 3) { + sti(); + printk("%s: interrupt - packet received of length %i (%i)\n", dev->name, len, dlen); + cli(); + } + if (adapter->irx_pcb.command == 0xff) { + if (elp_debug >= 2) + printk("%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); + } + sti(); + if (elp_debug >= 3) + printk("%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("%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("%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("%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("%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("%s: interrupt - statistics response received\n", dev->name); + break; + + /* + * sent a packet + */ + case CMD_TRANSMIT_PACKET_COMPLETE: + if (elp_debug >= 3) + printk("%s: interrupt - packet sent\n", dev->name); + if (dev->start == 0) + 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; + } + dev->tbusy = 0; + mark_bh(NET_BH); + break; + + /* + * some unknown PCB + */ + default: + printk(KERN_DEBUG "%s: unknown PCB received - %2.2x\n", dev->name, adapter->irx_pcb.command); + break; + } + } else { + printk("%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 + */ + dev->interrupt = 0; +} + + +/****************************************************** + * + * open the board + * + ******************************************************/ + +static int elp_open(struct device *dev) +{ + elp_device *adapter; + + adapter = dev->priv; + + if (elp_debug >= 3) + printk("%s: request to open device\n", dev->name); + + /* + * make sure we actually found the device + */ + if (adapter == NULL) { + printk("%s: Opening a non-existent physical device\n", dev->name); + return -EAGAIN; + } + /* + * disable interrupts on the board + */ + outb_control(0x00, dev->base_addr); + + /* + * clear any pending interrupts + */ + inb_command(dev->base_addr); + adapter_reset(dev); + + /* + * interrupt routine not entered + */ + dev->interrupt = 0; + + /* + * transmitter not busy + */ + dev->tbusy = 0; + + /* + * 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; + + /* + * make sure we can find the device header given the interrupt number + */ + irq2dev_map[dev->irq] = dev; + + /* + * install our interrupt service routine + */ + if (request_irq(dev->irq, &elp_interrupt, 0, "3c505", NULL)) { + irq2dev_map[dev->irq] = NULL; + return -EAGAIN; + } + if (request_dma(dev->dma, "3c505")) { + printk("%s: could not allocate DMA channel\n", dev->name); + return -EAGAIN; + } + adapter->dma_buffer = (void *) dma_mem_alloc(DMA_BUFFER_SIZE); + if (!adapter->dma_buffer) { + printk("Could not allocate DMA buffer\n"); + } + adapter->dmaing = 0; + + /* + * enable interrupts on the board + */ + outb_control(CMDE, dev->base_addr); + + /* + * device is now officially open! + */ + dev->start = 1; + + /* + * configure adapter memory: we need 10 multicast addresses, default==0 + */ + if (elp_debug >= 3) + printk("%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("%s: couldn't send memory configuration command\n", dev->name); + else { + int timeout = jiffies + TIMEOUT; + while (adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] == 0 && jiffies < timeout); + if (jiffies >= timeout) + TIMEOUT_MSG(__LINE__); + } + + + /* + * configure adapter to receive broadcast messages and wait for response + */ + if (elp_debug >= 3) + printk("%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("%s: couldn't send 82586 configure command\n", dev->name); + else { + int timeout = jiffies + TIMEOUT; + while (adapter->got[CMD_CONFIGURE_82586] == 0 && jiffies < timeout); + if (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("%s: %d receive PCBs active\n", dev->name, adapter->rx_active); + + MOD_INC_USE_COUNT; + + return 0; /* Always succeed */ +} + + +/****************************************************** + * + * send a packet to the adapter + * + ******************************************************/ + +static int send_packet(struct device *dev, struct sk_buff *skb) +{ + elp_device *adapter = dev->priv; + unsigned long target; + + /* + * make sure the length is even and no shorter than 60 bytes + */ + unsigned int nlen = (((skb->len < 60) ? 60 : skb->len) + 1) & (~1); + + if (set_bit(0, (void *) &adapter->busy)) { + if (elp_debug >= 2) + printk("%s: transmit blocked\n", dev->name); + return FALSE; + } + adapter = dev->priv; + + /* + * 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 (set_bit(0, (void *) &adapter->dmaing)) + printk("%s: tx: DMA %d in progress\n", dev->name, adapter->current_dma.direction); + + adapter->current_dma.direction = 1; + adapter->current_dma.start_time = jiffies; + + target = virt_to_bus(skb->data); + if ((target + nlen) >= MAX_DMA_ADDRESS) { + memcpy(adapter->dma_buffer, skb->data, nlen); + target = virt_to_bus(adapter->dma_buffer); + } + adapter->current_dma.skb = skb; + cli(); + disable_dma(dev->dma); + clear_dma_ff(dev->dma); + set_dma_mode(dev->dma, 0x08); /* dma memory -> io */ + set_dma_addr(dev->dma, target); + set_dma_count(dev->dma, nlen); + enable_dma(dev->dma); + outb_control(inb_control(dev->base_addr) | DMAE | TCEN, dev->base_addr); + if (elp_debug >= 3) + printk("%s: DMA transfer started\n", dev->name); + + return TRUE; +} + +/****************************************************** + * + * start the transmitter + * return 0 if sent OK, else return 1 + * + ******************************************************/ + +static int elp_start_xmit(struct sk_buff *skb, struct device *dev) +{ + if (dev->interrupt) { + printk("%s: start_xmit aborted (in irq)\n", dev->name); + return 1; + } + + check_dma(dev); + + /* + * if the transmitter is still busy, we have a transmit timeout... + */ + if (dev->tbusy) { + elp_device *adapter = dev->priv; + int tickssofar = jiffies - dev->trans_start; + int stat; + + if (tickssofar < 1000) + return 1; + + stat = inb_status(dev->base_addr); + printk("%s: transmit timed out, lost %s?\n", dev->name, (stat & ACRF) ? "interrupt" : "command"); + if (elp_debug >= 1) + printk("%s: status %#02x\n", dev->name, stat); + dev->trans_start = jiffies; + dev->tbusy = 0; + adapter->stats.tx_dropped++; + } + + /* Some upper layer thinks we've missed a tx-done interrupt */ + if (skb == NULL) { + dev_tint(dev); + return 0; + } + + if (skb->len <= 0) + return 0; + + if (elp_debug >= 3) + printk("%s: request to send packet of length %d\n", dev->name, (int) skb->len); + + if (set_bit(0, (void *) &dev->tbusy)) { + printk("%s: transmitter access conflict\n", dev->name); + return 1; + } + /* + * send the packet at skb->data for skb->len + */ + if (!send_packet(dev, skb)) { + if (elp_debug >= 2) { + printk("%s: failed to transmit packet\n", dev->name); + } + dev->tbusy = 0; + return 1; + } + if (elp_debug >= 3) + printk("%s: packet of length %d sent\n", dev->name, (int) skb->len); + + /* + * start the transmit timeout + */ + dev->trans_start = jiffies; + + prime_rx(dev); + + return 0; +} + +/****************************************************** + * + * return statistics on the board + * + ******************************************************/ + +static struct enet_statistics *elp_get_stats(struct device *dev) +{ + elp_device *adapter = (elp_device *) dev->priv; + + if (elp_debug >= 3) + printk("%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 (!dev->start) + 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("%s: couldn't send get statistics command\n", dev->name); + else { + int timeout = jiffies + TIMEOUT; + while (adapter->got[CMD_NETWORK_STATISTICS] == 0 && jiffies < timeout); + if (jiffies >= timeout) { + TIMEOUT_MSG(__LINE__); + return &adapter->stats; + } + } + + /* statistics are now up to date */ + return &adapter->stats; +} + +/****************************************************** + * + * close the board + * + ******************************************************/ + +static int elp_close(struct device *dev) +{ + elp_device *adapter; + + adapter = dev->priv; + + if (elp_debug >= 3) + printk("%s: request to close device\n", dev->name); + + /* 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(0x00, dev->base_addr); + + /* + * flag transmitter as busy (i.e. not available) + */ + dev->tbusy = 1; + + /* + * indicate device is closed + */ + dev->start = 0; + + /* + * release the IRQ + */ + free_irq(dev->irq, NULL); + + /* + * and we no longer have to map irq to dev either + */ + irq2dev_map[dev->irq] = 0; + + free_dma(dev->dma); + free_pages((unsigned long) adapter->dma_buffer, __get_order(DMA_BUFFER_SIZE)); + + MOD_DEC_USE_COUNT; + + 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 device *dev) +{ + elp_device *adapter = (elp_device *) dev->priv; + struct dev_mc_list *dmi = dev->mc_list; + int i; + + if (elp_debug >= 3) + printk("%s: request to set multicast list\n", dev->name); + + 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("%s: couldn't send set_multicast command\n", dev->name); + else { + int timeout = jiffies + TIMEOUT; + while (adapter->got[CMD_LOAD_MULTICAST_LIST] == 0 && jiffies < timeout); + if (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("%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)) + printk("%s: couldn't send 82586 configure command\n", dev->name); + else { + int timeout = jiffies + TIMEOUT; + while (adapter->got[CMD_CONFIGURE_82586] == 0 && jiffies < timeout); + if (jiffies >= timeout) + TIMEOUT_MSG(__LINE__); + } +} + +/****************************************************** + * + * initialise Etherlink Plus board + * + ******************************************************/ + +static void elp_init(struct device *dev) +{ + elp_device *adapter = dev->priv; + + /* + * set ptrs to various functions + */ + 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->set_multicast_list = elp_set_mc_list; /* local */ + + /* Setup the generic properties */ + ether_setup(dev); + + /* + * setup ptr to adapter specific information + */ + memset(&(adapter->stats), 0, sizeof(struct enet_statistics)); + + /* + * memory information + */ + dev->mem_start = dev->mem_end = dev->rmem_end = dev->rmem_start = 0; +} + +/************************************************************ + * + * A couple of tests to see if there's 3C505 or not + * Called only by elp_autodetect + ************************************************************/ + +static int elp_sense(struct device *dev) +{ + int timeout; + int addr = dev->base_addr; + const char *name = dev->name; + long flags; + byte orig_HCR, orig_HSR; + + if (check_region(addr, 0xf)) + return -1; + + orig_HCR = inb_control(addr); + orig_HSR = inb_status(addr); + + if (elp_debug > 0) + printk(search_msg, name, addr); + + if (((orig_HCR == 0xff) && (orig_HSR == 0xff)) || + ((orig_HCR & DIR) != (orig_HSR & DIR))) { + if (elp_debug > 0) + printk(notfound_msg, 1); + return -1; /* It can't be 3c505 if HCR.DIR != HSR.DIR */ + } + /* Enable interrupts - we need timers! */ + save_flags(flags); + sti(); + + /* Wait for a while; the adapter may still be booting up */ + if (elp_debug > 0) + printk(stilllooking_msg); + if (orig_HCR & DIR) { + /* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */ + outb_control(orig_HCR & ~DIR, addr); + timeout = jiffies + 30; + while (jiffies < timeout); + restore_flags(flags); + if (inb_status(addr) & DIR) { + outb_control(orig_HCR, addr); + if (elp_debug > 0) + printk(notfound_msg, 2); + return -1; + } + } else { + /* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */ + outb_control(orig_HCR | DIR, addr); + timeout = jiffies + 30; + while (jiffies < timeout); + restore_flags(flags); + if (!(inb_status(addr) & DIR)) { + outb_control(orig_HCR, addr); + if (elp_debug > 0) + printk(notfound_msg, 3); + return -1; + } + } + /* + * It certainly looks like a 3c505. If it has DMA enabled, it needs + * a hard reset. Also, do a hard reset if selected at the compile time. + */ + if (elp_debug > 0) + printk(found_msg); + + return 0; +} + +/************************************************************* + * + * Search through addr_list[] and try to find a 3C505 + * Called only by eplus_probe + *************************************************************/ + +static int elp_autodetect(struct 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). + */ + +int elplus_probe(struct device *dev) +{ + elp_device *adapter; + int i, tries, tries1, timeout, okay; + + /* + * setup adapter structure + */ + + dev->base_addr = elp_autodetect(dev); + if (!(dev->base_addr)) + return -ENODEV; + + /* + * setup ptr to adapter specific information + */ + adapter = (elp_device *) (dev->priv = kmalloc(sizeof(elp_device), GFP_KERNEL)); + if (adapter == NULL) { + printk("%s: out of memory\n", dev->name); + return -ENODEV; + } + + for (tries1 = 0; tries1 < 3; tries1++) { + outb_control((inb_control(dev->base_addr) | CMDE) & ~DIR, dev->base_addr); + /* First try to write just one byte, to see if the card is + * responding at all normally. + */ + timeout = jiffies + 5; + okay = 0; + while (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; + while (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("%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 (jiffies < timeout && (inb_status(dev->base_addr) & 7)); + if (inb_status(dev->base_addr) & 7) { + printk("%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; + autoirq_setup(0); + if (!send_pcb(dev, &adapter->tx_pcb)) { + printk("%s: could not send first PCB\n", dev->name); + autoirq_report(0); + continue; + } + if (!receive_pcb(dev, &adapter->rx_pcb)) { + printk("%s: could not read first PCB\n", dev->name); + autoirq_report(0); + continue; + } + if ((adapter->rx_pcb.command != CMD_ADDRESS_RESPONSE) || + (adapter->rx_pcb.length != 6)) { + printk("%s: first PCB wrong (%d, %d)\n", dev->name, adapter->rx_pcb.command, adapter->rx_pcb.length); + autoirq_report(0); + 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(inb_control(dev->base_addr) | FLSH | ATTN, dev->base_addr); + outb_control(inb_control(dev->base_addr) & ~(FLSH | ATTN), dev->base_addr); + } + printk("%s: failed to initialise 3c505\n", dev->name); + return -ENODEV; + + okay: + if (dev->irq) { /* Is there a preset IRQ? */ + int rpt = autoirq_report(0); + if (dev->irq != rpt) { + printk("%s: warning, irq %d configured but %d detected\n", dev->name, dev->irq, rpt); + return -ENODEV; + } + /* if dev->irq == autoirq_report(0), all is well */ + } else /* No preset IRQ; just use what we can detect */ + dev->irq = autoirq_report(0); + switch (dev->irq) { /* Legal, sane? */ + case 0: + printk("%s: No IRQ reported by autoirq_report().\n", dev->name); + printk("%s: Check the jumpers of your 3c505 board.\n", dev->name); + return -ENODEV; + case 1: + case 6: + case 8: + case 13: + printk("%s: Impossible IRQ %d reported by autoirq_report().\n", + dev->name, dev->irq); + return -ENODEV; + } + /* + * Now we have the IRQ number so we can disable the interrupts from + * the board until the board is opened. + */ + outb_control(inb_control(dev->base_addr) & ~CMDE, dev->base_addr); + + /* + * copy ethernet address into structure + */ + for (i = 0; i < 6; i++) + dev->dev_addr[i] = adapter->rx_pcb.data.eth_addr[i]; + + /* set up the DMA channel */ + dev->dma = ELP_DMA; + + /* + * print remainder of startup message + */ + printk("%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("%s: not responding to second PCB\n", dev->name); + } + 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("%s: could not configure adapter memory\n", dev->name); + } + if (adapter->rx_pcb.data.configure) { + printk("%s: adapter configuration failed\n", dev->name); + } + /* + * and reserve the address region + */ + request_region(dev->base_addr, ELP_IO_EXTENT, "3c505"); + + /* + * initialise the device + */ + elp_init(dev); + + return 0; +} + +#ifdef MODULE +static char devicename[9] = {0,}; +static struct device dev_3c505 = +{ + devicename, /* device name is inserted by linux/drivers/net/net_init.c */ + 0, 0, 0, 0, + 0, 0, + 0, 0, 0, NULL, elplus_probe}; + +int io = 0x300; +int irq = 0; + +int init_module(void) +{ + if (io == 0) + printk("3c505: You should not use auto-probing with insmod!\n"); + dev_3c505.base_addr = io; + dev_3c505.irq = irq; + if (register_netdev(&dev_3c505) != 0) { + return -EIO; + } + return 0; +} + +void cleanup_module(void) +{ + unregister_netdev(&dev_3c505); + kfree(dev_3c505.priv); + dev_3c505.priv = NULL; + + /* If we don't do this, we can't re-insmod it later. */ + release_region(dev_3c505.base_addr, ELP_IO_EXTENT); +} + +#endif /* MODULE */ + + +/* + * Local Variables: + * c-file-style: "linux" + * tab-width: 8 + * compile-command: "gcc -D__KERNEL__ -I/discs/bibble/src/linux-1.3.69/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -fno-strength-reduce -pipe -m486 -DCPU=486 -DMODULE -c 3c505.c" + * End: + */ -- cgit v1.2.3