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linux/drivers/net/wan/sdla.c
Stephen Hemminger 384824281c wan: dlci/sdla transmit return dehacking 
This is a brute force removal of the wierd slave interface done for
DLCI -> SDLA transmit. Before it was using non-standard return values
and freeing skb in caller.  This changes it to using normal return
values, and freeing in the callee.  Luckly only one driver pair was
doing this. Not tested on real hardware, in fact I wonder if this
driver pair is even being used by any users.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-07 01:56:33 -07:00

1664 lines
38 KiB
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Raw Blame History

/*
* SDLA An implementation of a driver for the Sangoma S502/S508 series
* multi-protocol PC interface card. Initial offering is with
* the DLCI driver, providing Frame Relay support for linux.
*
* Global definitions for the Frame relay interface.
*
* Version: @(#)sdla.c 0.30 12 Sep 1996
*
* Credits: Sangoma Technologies, for the use of 2 cards for an extended
* period of time.
* David Mandelstam <dm@sangoma.com> for getting me started on
* this project, and incentive to complete it.
* Gene Kozen <74604.152@compuserve.com> for providing me with
* important information about the cards.
*
* Author: Mike McLagan <mike.mclagan@linux.org>
*
* Changes:
* 0.15 Mike McLagan Improved error handling, packet dropping
* 0.20 Mike McLagan New transmit/receive flags for config
* If in FR mode, don't accept packets from
* non DLCI devices.
* 0.25 Mike McLagan Fixed problem with rejecting packets
* from non DLCI devices.
* 0.30 Mike McLagan Fixed kernel panic when used with modified
* ifconfig
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/if_frad.h>
#include <linux/sdla.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/uaccess.h>
static const char* version = "SDLA driver v0.30, 12 Sep 1996, mike.mclagan@linux.org";
static unsigned int valid_port[] = { 0x250, 0x270, 0x280, 0x300, 0x350, 0x360, 0x380, 0x390};
static unsigned int valid_mem[] = {
0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000, 0xAE000,
0xB0000, 0xB2000, 0xB4000, 0xB6000, 0xB8000, 0xBA000, 0xBC000, 0xBE000,
0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000, 0xCE000,
0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000, 0xDE000,
0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000, 0xEE000};
static DEFINE_SPINLOCK(sdla_lock);
/*********************************************************
*
* these are the core routines that access the card itself
*
*********************************************************/
#define SDLA_WINDOW(dev,addr) outb((((addr) >> 13) & 0x1F), (dev)->base_addr + SDLA_REG_Z80_WINDOW)
static void __sdla_read(struct net_device *dev, int addr, void *buf, short len)
{
char *temp;
const void *base;
int offset, bytes;
temp = buf;
while(len)
{
offset = addr & SDLA_ADDR_MASK;
bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
base = (const void *) (dev->mem_start + offset);
SDLA_WINDOW(dev, addr);
memcpy(temp, base, bytes);
addr += bytes;
temp += bytes;
len -= bytes;
}
}
static void sdla_read(struct net_device *dev, int addr, void *buf, short len)
{
unsigned long flags;
spin_lock_irqsave(&sdla_lock, flags);
__sdla_read(dev, addr, buf, len);
spin_unlock_irqrestore(&sdla_lock, flags);
}
static void __sdla_write(struct net_device *dev, int addr,
const void *buf, short len)
{
const char *temp;
void *base;
int offset, bytes;
temp = buf;
while(len)
{
offset = addr & SDLA_ADDR_MASK;
bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
base = (void *) (dev->mem_start + offset);
SDLA_WINDOW(dev, addr);
memcpy(base, temp, bytes);
addr += bytes;
temp += bytes;
len -= bytes;
}
}
static void sdla_write(struct net_device *dev, int addr,
const void *buf, short len)
{
unsigned long flags;
spin_lock_irqsave(&sdla_lock, flags);
__sdla_write(dev, addr, buf, len);
spin_unlock_irqrestore(&sdla_lock, flags);
}
static void sdla_clear(struct net_device *dev)
{
unsigned long flags;
char *base;
int len, addr, bytes;
len = 65536;
addr = 0;
bytes = SDLA_WINDOW_SIZE;
base = (void *) dev->mem_start;
spin_lock_irqsave(&sdla_lock, flags);
while(len)
{
SDLA_WINDOW(dev, addr);
memset(base, 0, bytes);
addr += bytes;
len -= bytes;
}
spin_unlock_irqrestore(&sdla_lock, flags);
}
static char sdla_byte(struct net_device *dev, int addr)
{
unsigned long flags;
char byte, *temp;
temp = (void *) (dev->mem_start + (addr & SDLA_ADDR_MASK));
spin_lock_irqsave(&sdla_lock, flags);
SDLA_WINDOW(dev, addr);
byte = *temp;
spin_unlock_irqrestore(&sdla_lock, flags);
return(byte);
}
static void sdla_stop(struct net_device *dev)
{
struct frad_local *flp;
flp = netdev_priv(dev);
switch(flp->type)
{
case SDLA_S502A:
outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL);
flp->state = SDLA_HALT;
break;
case SDLA_S502E:
outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL);
outb(SDLA_S502E_ENABLE, dev->base_addr + SDLA_REG_CONTROL);
flp->state = SDLA_S502E_ENABLE;
break;
case SDLA_S507:
flp->state &= ~SDLA_CPUEN;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
break;
case SDLA_S508:
flp->state &= ~SDLA_CPUEN;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
break;
}
}
static void sdla_start(struct net_device *dev)
{
struct frad_local *flp;
flp = netdev_priv(dev);
switch(flp->type)
{
case SDLA_S502A:
outb(SDLA_S502A_NMI, dev->base_addr + SDLA_REG_CONTROL);
outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
flp->state = SDLA_S502A_START;
break;
case SDLA_S502E:
outb(SDLA_S502E_CPUEN, dev->base_addr + SDLA_REG_Z80_CONTROL);
outb(0x00, dev->base_addr + SDLA_REG_CONTROL);
flp->state = 0;
break;
case SDLA_S507:
flp->state |= SDLA_CPUEN;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
break;
case SDLA_S508:
flp->state |= SDLA_CPUEN;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
break;
}
}
/****************************************************
*
* this is used for the S502A/E cards to determine
* the speed of the onboard CPU. Calibration is
* necessary for the Frame Relay code uploaded
* later. Incorrect results cause timing problems
* with link checks & status messages
*
***************************************************/
static int sdla_z80_poll(struct net_device *dev, int z80_addr, int jiffs, char resp1, char resp2)
{
unsigned long start, done, now;
char resp, *temp;
start = now = jiffies;
done = jiffies + jiffs;
temp = (void *)dev->mem_start;
temp += z80_addr & SDLA_ADDR_MASK;
resp = ~resp1;
while (time_before(jiffies, done) && (resp != resp1) && (!resp2 || (resp != resp2)))
{
if (jiffies != now)
{
SDLA_WINDOW(dev, z80_addr);
now = jiffies;
resp = *temp;
}
}
return(time_before(jiffies, done) ? jiffies - start : -1);
}
/* constants for Z80 CPU speed */
#define Z80_READY '1' /* Z80 is ready to begin */
#define LOADER_READY '2' /* driver is ready to begin */
#define Z80_SCC_OK '3' /* SCC is on board */
#define Z80_SCC_BAD '4' /* SCC was not found */
static int sdla_cpuspeed(struct net_device *dev, struct ifreq *ifr)
{
int jiffs;
char data;
sdla_start(dev);
if (sdla_z80_poll(dev, 0, 3*HZ, Z80_READY, 0) < 0)
return(-EIO);
data = LOADER_READY;
sdla_write(dev, 0, &data, 1);
if ((jiffs = sdla_z80_poll(dev, 0, 8*HZ, Z80_SCC_OK, Z80_SCC_BAD)) < 0)
return(-EIO);
sdla_stop(dev);
sdla_read(dev, 0, &data, 1);
if (data == Z80_SCC_BAD)
{
printk("%s: SCC bad\n", dev->name);
return(-EIO);
}
if (data != Z80_SCC_OK)
return(-EINVAL);
if (jiffs < 165)
ifr->ifr_mtu = SDLA_CPU_16M;
else if (jiffs < 220)
ifr->ifr_mtu = SDLA_CPU_10M;
else if (jiffs < 258)
ifr->ifr_mtu = SDLA_CPU_8M;
else if (jiffs < 357)
ifr->ifr_mtu = SDLA_CPU_7M;
else if (jiffs < 467)
ifr->ifr_mtu = SDLA_CPU_5M;
else
ifr->ifr_mtu = SDLA_CPU_3M;
return(0);
}
/************************************************
*
* Direct interaction with the Frame Relay code
* starts here.
*
************************************************/
struct _dlci_stat
{
short dlci;
char flags;
} __attribute__((packed));
struct _frad_stat
{
char flags;
struct _dlci_stat dlcis[SDLA_MAX_DLCI];
};
static void sdla_errors(struct net_device *dev, int cmd, int dlci, int ret, int len, void *data)
{
struct _dlci_stat *pstatus;
short *pdlci;
int i;
char *state, line[30];
switch (ret)
{
case SDLA_RET_MODEM:
state = data;
if (*state & SDLA_MODEM_DCD_LOW)
printk(KERN_INFO "%s: Modem DCD unexpectedly low!\n", dev->name);
if (*state & SDLA_MODEM_CTS_LOW)
printk(KERN_INFO "%s: Modem CTS unexpectedly low!\n", dev->name);
/* I should probably do something about this! */
break;
case SDLA_RET_CHANNEL_OFF:
printk(KERN_INFO "%s: Channel became inoperative!\n", dev->name);
/* same here */
break;
case SDLA_RET_CHANNEL_ON:
printk(KERN_INFO "%s: Channel became operative!\n", dev->name);
/* same here */
break;
case SDLA_RET_DLCI_STATUS:
printk(KERN_INFO "%s: Status change reported by Access Node.\n", dev->name);
len /= sizeof(struct _dlci_stat);
for(pstatus = data, i=0;i < len;i++,pstatus++)
{
if (pstatus->flags & SDLA_DLCI_NEW)
state = "new";
else if (pstatus->flags & SDLA_DLCI_DELETED)
state = "deleted";
else if (pstatus->flags & SDLA_DLCI_ACTIVE)
state = "active";
else
{
sprintf(line, "unknown status: %02X", pstatus->flags);
state = line;
}
printk(KERN_INFO "%s: DLCI %i: %s.\n", dev->name, pstatus->dlci, state);
/* same here */
}
break;
case SDLA_RET_DLCI_UNKNOWN:
printk(KERN_INFO "%s: Received unknown DLCIs:", dev->name);
len /= sizeof(short);
for(pdlci = data,i=0;i < len;i++,pdlci++)
printk(" %i", *pdlci);
printk("\n");
break;
case SDLA_RET_TIMEOUT:
printk(KERN_ERR "%s: Command timed out!\n", dev->name);
break;
case SDLA_RET_BUF_OVERSIZE:
printk(KERN_INFO "%s: Bc/CIR overflow, acceptable size is %i\n", dev->name, len);
break;
case SDLA_RET_BUF_TOO_BIG:
printk(KERN_INFO "%s: Buffer size over specified max of %i\n", dev->name, len);
break;
case SDLA_RET_CHANNEL_INACTIVE:
case SDLA_RET_DLCI_INACTIVE:
case SDLA_RET_CIR_OVERFLOW:
case SDLA_RET_NO_BUFS:
if (cmd == SDLA_INFORMATION_WRITE)
break;
default:
printk(KERN_DEBUG "%s: Cmd 0x%2.2X generated return code 0x%2.2X\n", dev->name, cmd, ret);
/* Further processing could be done here */
break;
}
}
static int sdla_cmd(struct net_device *dev, int cmd, short dlci, short flags,
void *inbuf, short inlen, void *outbuf, short *outlen)
{
static struct _frad_stat status;
struct frad_local *flp;
struct sdla_cmd *cmd_buf;
unsigned long pflags;
unsigned long jiffs;
int ret, waiting, len;
long window;
flp = netdev_priv(dev);
window = flp->type == SDLA_S508 ? SDLA_508_CMD_BUF : SDLA_502_CMD_BUF;
cmd_buf = (struct sdla_cmd *)(dev->mem_start + (window & SDLA_ADDR_MASK));
ret = 0;
len = 0;
jiffs = jiffies + HZ; /* 1 second is plenty */
spin_lock_irqsave(&sdla_lock, pflags);
SDLA_WINDOW(dev, window);
cmd_buf->cmd = cmd;
cmd_buf->dlci = dlci;
cmd_buf->flags = flags;
if (inbuf)
memcpy(cmd_buf->data, inbuf, inlen);
cmd_buf->length = inlen;
cmd_buf->opp_flag = 1;
spin_unlock_irqrestore(&sdla_lock, pflags);
waiting = 1;
len = 0;
while (waiting && time_before_eq(jiffies, jiffs))
{
if (waiting++ % 3)
{
spin_lock_irqsave(&sdla_lock, pflags);
SDLA_WINDOW(dev, window);
waiting = ((volatile int)(cmd_buf->opp_flag));
spin_unlock_irqrestore(&sdla_lock, pflags);
}
}
if (!waiting)
{
spin_lock_irqsave(&sdla_lock, pflags);
SDLA_WINDOW(dev, window);
ret = cmd_buf->retval;
len = cmd_buf->length;
if (outbuf && outlen)
{
*outlen = *outlen >= len ? len : *outlen;
if (*outlen)
memcpy(outbuf, cmd_buf->data, *outlen);
}
/* This is a local copy that's used for error handling */
if (ret)
memcpy(&status, cmd_buf->data, len > sizeof(status) ? sizeof(status) : len);
spin_unlock_irqrestore(&sdla_lock, pflags);
}
else
ret = SDLA_RET_TIMEOUT;
if (ret != SDLA_RET_OK)
sdla_errors(dev, cmd, dlci, ret, len, &status);
return(ret);
}
/***********************************************
*
* these functions are called by the DLCI driver
*
***********************************************/
static int sdla_reconfig(struct net_device *dev);
static int sdla_activate(struct net_device *slave, struct net_device *master)
{
struct frad_local *flp;
int i;
flp = netdev_priv(slave);
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->master[i] == master)
break;
if (i == CONFIG_DLCI_MAX)
return(-ENODEV);
flp->dlci[i] = abs(flp->dlci[i]);
if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
sdla_cmd(slave, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
return(0);
}
static int sdla_deactivate(struct net_device *slave, struct net_device *master)
{
struct frad_local *flp;
int i;
flp = netdev_priv(slave);
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->master[i] == master)
break;
if (i == CONFIG_DLCI_MAX)
return(-ENODEV);
flp->dlci[i] = -abs(flp->dlci[i]);
if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
sdla_cmd(slave, SDLA_DEACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
return(0);
}
static int sdla_assoc(struct net_device *slave, struct net_device *master)
{
struct frad_local *flp;
int i;
if (master->type != ARPHRD_DLCI)
return(-EINVAL);
flp = netdev_priv(slave);
for(i=0;i<CONFIG_DLCI_MAX;i++)
{
if (!flp->master[i])
break;
if (abs(flp->dlci[i]) == *(short *)(master->dev_addr))
return(-EADDRINUSE);
}
if (i == CONFIG_DLCI_MAX)
return(-EMLINK); /* #### Alan: Comments on this ?? */
flp->master[i] = master;
flp->dlci[i] = -*(short *)(master->dev_addr);
master->mtu = slave->mtu;
if (netif_running(slave)) {
if (flp->config.station == FRAD_STATION_CPE)
sdla_reconfig(slave);
else
sdla_cmd(slave, SDLA_ADD_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
}
return(0);
}
static int sdla_deassoc(struct net_device *slave, struct net_device *master)
{
struct frad_local *flp;
int i;
flp = netdev_priv(slave);
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->master[i] == master)
break;
if (i == CONFIG_DLCI_MAX)
return(-ENODEV);
flp->master[i] = NULL;
flp->dlci[i] = 0;
if (netif_running(slave)) {
if (flp->config.station == FRAD_STATION_CPE)
sdla_reconfig(slave);
else
sdla_cmd(slave, SDLA_DELETE_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
}
return(0);
}
static int sdla_dlci_conf(struct net_device *slave, struct net_device *master, int get)
{
struct frad_local *flp;
struct dlci_local *dlp;
int i;
short len, ret;
flp = netdev_priv(slave);
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->master[i] == master)
break;
if (i == CONFIG_DLCI_MAX)
return(-ENODEV);
dlp = netdev_priv(master);
ret = SDLA_RET_OK;
len = sizeof(struct dlci_conf);
if (netif_running(slave)) {
if (get)
ret = sdla_cmd(slave, SDLA_READ_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
NULL, 0, &dlp->config, &len);
else
ret = sdla_cmd(slave, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
&dlp->config, sizeof(struct dlci_conf) - 4 * sizeof(short), NULL, NULL);
}
return(ret == SDLA_RET_OK ? 0 : -EIO);
}
/**************************
*
* now for the Linux driver
*
**************************/
/* NOTE: the DLCI driver deals with freeing the SKB!! */
static netdev_tx_t sdla_transmit(struct sk_buff *skb,
struct net_device *dev)
{
struct frad_local *flp;
int ret, addr, accept, i;
short size;
unsigned long flags;
struct buf_entry *pbuf;
flp = netdev_priv(dev);
ret = 0;
accept = 1;
netif_stop_queue(dev);
/*
* stupid GateD insists on setting up the multicast router thru us
* and we're ill equipped to handle a non Frame Relay packet at this
* time!
*/
accept = 1;
switch (dev->type)
{
case ARPHRD_FRAD:
if (skb->dev->type != ARPHRD_DLCI)
{
printk(KERN_WARNING "%s: Non DLCI device, type %i, tried to send on FRAD module.\n", dev->name, skb->dev->type);
accept = 0;
}
break;
default:
printk(KERN_WARNING "%s: unknown firmware type 0x%4.4X\n", dev->name, dev->type);
accept = 0;
break;
}
if (accept)
{
/* this is frame specific, but till there's a PPP module, it's the default */
switch (flp->type)
{
case SDLA_S502A:
case SDLA_S502E:
ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
break;
case SDLA_S508:
size = sizeof(addr);
ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
if (ret == SDLA_RET_OK)
{
spin_lock_irqsave(&sdla_lock, flags);
SDLA_WINDOW(dev, addr);
pbuf = (void *)(((int) dev->mem_start) + (addr & SDLA_ADDR_MASK));
__sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
SDLA_WINDOW(dev, addr);
pbuf->opp_flag = 1;
spin_unlock_irqrestore(&sdla_lock, flags);
}
break;
}
switch (ret)
{
case SDLA_RET_OK:
dev->stats.tx_packets++;
break;
case SDLA_RET_CIR_OVERFLOW:
case SDLA_RET_BUF_OVERSIZE:
case SDLA_RET_NO_BUFS:
dev->stats.tx_dropped++;
break;
default:
dev->stats.tx_errors++;
break;
}
}
netif_wake_queue(dev);
for(i=0;i<CONFIG_DLCI_MAX;i++)
{
if(flp->master[i]!=NULL)
netif_wake_queue(flp->master[i]);
}
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static void sdla_receive(struct net_device *dev)
{
struct net_device *master;
struct frad_local *flp;
struct dlci_local *dlp;
struct sk_buff *skb;
struct sdla_cmd *cmd;
struct buf_info *pbufi;
struct buf_entry *pbuf;
unsigned long flags;
int i=0, received, success, addr, buf_base, buf_top;
short dlci, len, len2, split;
flp = netdev_priv(dev);
success = 1;
received = addr = buf_top = buf_base = 0;
len = dlci = 0;
skb = NULL;
master = NULL;
cmd = NULL;
pbufi = NULL;
pbuf = NULL;
spin_lock_irqsave(&sdla_lock, flags);
switch (flp->type)
{
case SDLA_S502A:
case SDLA_S502E:
cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
success = cmd->opp_flag;
if (!success)
break;
dlci = cmd->dlci;
len = cmd->length;
break;
case SDLA_S508:
pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
success = pbuf->opp_flag;
if (!success)
break;
buf_top = pbufi->buf_top;
buf_base = pbufi->buf_base;
dlci = pbuf->dlci;
len = pbuf->length;
addr = pbuf->buf_addr;
break;
}
/* common code, find the DLCI and get the SKB */
if (success)
{
for (i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->dlci[i] == dlci)
break;
if (i == CONFIG_DLCI_MAX)
{
printk(KERN_NOTICE "%s: Received packet from invalid DLCI %i, ignoring.", dev->name, dlci);
dev->stats.rx_errors++;
success = 0;
}
}
if (success)
{
master = flp->master[i];
skb = dev_alloc_skb(len + sizeof(struct frhdr));
if (skb == NULL)
{
printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
dev->stats.rx_dropped++;
success = 0;
}
else
skb_reserve(skb, sizeof(struct frhdr));
}
/* pick up the data */
switch (flp->type)
{
case SDLA_S502A:
case SDLA_S502E:
if (success)
__sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
cmd->opp_flag = 0;
break;
case SDLA_S508:
if (success)
{
/* is this buffer split off the end of the internal ring buffer */
split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
len2 = len - split;
__sdla_read(dev, addr, skb_put(skb, len2), len2);
if (split)
__sdla_read(dev, buf_base, skb_put(skb, split), split);
}
/* increment the buffer we're looking at */
SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
pbuf->opp_flag = 0;
break;
}
if (success)
{
dev->stats.rx_packets++;
dlp = netdev_priv(master);
(*dlp->receive)(skb, master);
}
spin_unlock_irqrestore(&sdla_lock, flags);
}
static irqreturn_t sdla_isr(int dummy, void *dev_id)
{
struct net_device *dev;
struct frad_local *flp;
char byte;
dev = dev_id;
flp = netdev_priv(dev);
if (!flp->initialized)
{
printk(KERN_WARNING "%s: irq %d for uninitialized device.\n",
dev->name, dev->irq);
return IRQ_NONE;
}
byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
switch (byte)
{
case SDLA_INTR_RX:
sdla_receive(dev);
break;
/* the command will get an error return, which is processed above */
case SDLA_INTR_MODEM:
case SDLA_INTR_STATUS:
sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
break;
case SDLA_INTR_TX:
case SDLA_INTR_COMPLETE:
case SDLA_INTR_TIMER:
printk(KERN_WARNING "%s: invalid irq flag 0x%02X.\n", dev->name, byte);
break;
}
/* the S502E requires a manual acknowledgement of the interrupt */
if (flp->type == SDLA_S502E)
{
flp->state &= ~SDLA_S502E_INTACK;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
flp->state |= SDLA_S502E_INTACK;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
}
/* this clears the byte, informing the Z80 we're done */
byte = 0;
sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
return IRQ_HANDLED;
}
static void sdla_poll(unsigned long device)
{
struct net_device *dev;
struct frad_local *flp;
dev = (struct net_device *) device;
flp = netdev_priv(dev);
if (sdla_byte(dev, SDLA_502_RCV_BUF))
sdla_receive(dev);
flp->timer.expires = 1;
add_timer(&flp->timer);
}
static int sdla_close(struct net_device *dev)
{
struct frad_local *flp;
struct intr_info intr;
int len, i;
short dlcis[CONFIG_DLCI_MAX];
flp = netdev_priv(dev);
len = 0;
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->dlci[i])
dlcis[len++] = abs(flp->dlci[i]);
len *= 2;
if (flp->config.station == FRAD_STATION_NODE)
{
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->dlci[i] > 0)
sdla_cmd(dev, SDLA_DEACTIVATE_DLCI, 0, 0, dlcis, len, NULL, NULL);
sdla_cmd(dev, SDLA_DELETE_DLCI, 0, 0, &flp->dlci[i], sizeof(flp->dlci[i]), NULL, NULL);
}
memset(&intr, 0, sizeof(intr));
/* let's start up the reception */
switch(flp->type)
{
case SDLA_S502A:
del_timer(&flp->timer);
break;
case SDLA_S502E:
sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
flp->state &= ~SDLA_S502E_INTACK;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
break;
case SDLA_S507:
break;
case SDLA_S508:
sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
flp->state &= ~SDLA_S508_INTEN;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
break;
}
sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
netif_stop_queue(dev);
return(0);
}
struct conf_data {
struct frad_conf config;
short dlci[CONFIG_DLCI_MAX];
};
static int sdla_open(struct net_device *dev)
{
struct frad_local *flp;
struct dlci_local *dlp;
struct conf_data data;
struct intr_info intr;
int len, i;
char byte;
flp = netdev_priv(dev);
if (!flp->initialized)
return(-EPERM);
if (!flp->configured)
return(-EPERM);
/* time to send in the configuration */
len = 0;
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->dlci[i])
data.dlci[len++] = abs(flp->dlci[i]);
len *= 2;
memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
len += sizeof(struct frad_conf);
sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
if (flp->type == SDLA_S508)
flp->buffer = 0;
sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
/* let's start up the reception */
memset(&intr, 0, sizeof(intr));
switch(flp->type)
{
case SDLA_S502A:
flp->timer.expires = 1;
add_timer(&flp->timer);
break;
case SDLA_S502E:
flp->state |= SDLA_S502E_ENABLE;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
flp->state |= SDLA_S502E_INTACK;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
byte = 0;
sdla_write(dev, SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
break;
case SDLA_S507:
break;
case SDLA_S508:
flp->state |= SDLA_S508_INTEN;
outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
byte = 0;
sdla_write(dev, SDLA_508_IRQ_INTERFACE, &byte, sizeof(byte));
intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
intr.irq = dev->irq;
sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
break;
}
if (flp->config.station == FRAD_STATION_CPE)
{
byte = SDLA_ICS_STATUS_ENQ;
sdla_cmd(dev, SDLA_ISSUE_IN_CHANNEL_SIGNAL, 0, 0, &byte, sizeof(byte), NULL, NULL);
}
else
{
sdla_cmd(dev, SDLA_ADD_DLCI, 0, 0, data.dlci, len - sizeof(struct frad_conf), NULL, NULL);
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->dlci[i] > 0)
sdla_cmd(dev, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], 2*sizeof(flp->dlci[i]), NULL, NULL);
}
/* configure any specific DLCI settings */
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->dlci[i])
{
dlp = netdev_priv(flp->master[i]);
if (dlp->configured)
sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0, &dlp->config, sizeof(struct dlci_conf), NULL, NULL);
}
netif_start_queue(dev);
return(0);
}
static int sdla_config(struct net_device *dev, struct frad_conf __user *conf, int get)
{
struct frad_local *flp;
struct conf_data data;
int i;
short size;
if (dev->type == 0xFFFF)
return(-EUNATCH);
flp = netdev_priv(dev);
if (!get)
{
if (netif_running(dev))
return(-EBUSY);
if(copy_from_user(&data.config, conf, sizeof(struct frad_conf)))
return -EFAULT;
if (data.config.station & ~FRAD_STATION_NODE)
return(-EINVAL);
if (data.config.flags & ~FRAD_VALID_FLAGS)
return(-EINVAL);
if ((data.config.kbaud < 0) ||
((data.config.kbaud > 128) && (flp->type != SDLA_S508)))
return(-EINVAL);
if (data.config.clocking & ~(FRAD_CLOCK_INT | SDLA_S508_PORT_RS232))
return(-EINVAL);
if ((data.config.mtu < 0) || (data.config.mtu > SDLA_MAX_MTU))
return(-EINVAL);
if ((data.config.T391 < 5) || (data.config.T391 > 30))
return(-EINVAL);
if ((data.config.T392 < 5) || (data.config.T392 > 30))
return(-EINVAL);
if ((data.config.N391 < 1) || (data.config.N391 > 255))
return(-EINVAL);
if ((data.config.N392 < 1) || (data.config.N392 > 10))
return(-EINVAL);
if ((data.config.N393 < 1) || (data.config.N393 > 10))
return(-EINVAL);
memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
flp->config.flags |= SDLA_DIRECT_RECV;
if (flp->type == SDLA_S508)
flp->config.flags |= SDLA_TX70_RX30;
if (dev->mtu != flp->config.mtu)
{
/* this is required to change the MTU */
dev->mtu = flp->config.mtu;
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->master[i])
flp->master[i]->mtu = flp->config.mtu;
}
flp->config.mtu += sizeof(struct frhdr);
/* off to the races! */
if (!flp->configured)
sdla_start(dev);
flp->configured = 1;
}
else
{
/* no sense reading if the CPU isn't started */
if (netif_running(dev))
{
size = sizeof(data);
if (sdla_cmd(dev, SDLA_READ_DLCI_CONFIGURATION, 0, 0, NULL, 0, &data, &size) != SDLA_RET_OK)
return(-EIO);
}
else
if (flp->configured)
memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
else
memset(&data.config, 0, sizeof(struct frad_conf));
memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
data.config.flags &= FRAD_VALID_FLAGS;
data.config.mtu -= data.config.mtu > sizeof(struct frhdr) ? sizeof(struct frhdr) : data.config.mtu;
return copy_to_user(conf, &data.config, sizeof(struct frad_conf))?-EFAULT:0;
}
return(0);
}
static int sdla_xfer(struct net_device *dev, struct sdla_mem __user *info, int read)
{
struct sdla_mem mem;
char *temp;
if(copy_from_user(&mem, info, sizeof(mem)))
return -EFAULT;
if (read)
{
temp = kzalloc(mem.len, GFP_KERNEL);
if (!temp)
return(-ENOMEM);
sdla_read(dev, mem.addr, temp, mem.len);
if(copy_to_user(mem.data, temp, mem.len))
{
kfree(temp);
return -EFAULT;
}
kfree(temp);
}
else
{
temp = kmalloc(mem.len, GFP_KERNEL);
if (!temp)
return(-ENOMEM);
if(copy_from_user(temp, mem.data, mem.len))
{
kfree(temp);
return -EFAULT;
}
sdla_write(dev, mem.addr, temp, mem.len);
kfree(temp);
}
return(0);
}
static int sdla_reconfig(struct net_device *dev)
{
struct frad_local *flp;
struct conf_data data;
int i, len;
flp = netdev_priv(dev);
len = 0;
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->dlci[i])
data.dlci[len++] = flp->dlci[i];
len *= 2;
memcpy(&data, &flp->config, sizeof(struct frad_conf));
len += sizeof(struct frad_conf);
sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
return(0);
}
static int sdla_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct frad_local *flp;
if(!capable(CAP_NET_ADMIN))
return -EPERM;
flp = netdev_priv(dev);
if (!flp->initialized)
return(-EINVAL);
switch (cmd)
{
case FRAD_GET_CONF:
case FRAD_SET_CONF:
return(sdla_config(dev, ifr->ifr_data, cmd == FRAD_GET_CONF));
case SDLA_IDENTIFY:
ifr->ifr_flags = flp->type;
break;
case SDLA_CPUSPEED:
return(sdla_cpuspeed(dev, ifr));
/* ==========================================================
NOTE: This is rather a useless action right now, as the
current driver does not support protocols other than
FR. However, Sangoma has modules for a number of
other protocols in the works.
============================================================*/
case SDLA_PROTOCOL:
if (flp->configured)
return(-EALREADY);
switch (ifr->ifr_flags)
{
case ARPHRD_FRAD:
dev->type = ifr->ifr_flags;
break;
default:
return(-ENOPROTOOPT);
}
break;
case SDLA_CLEARMEM:
sdla_clear(dev);
break;
case SDLA_WRITEMEM:
case SDLA_READMEM:
if(!capable(CAP_SYS_RAWIO))
return -EPERM;
return(sdla_xfer(dev, ifr->ifr_data, cmd == SDLA_READMEM));
case SDLA_START:
sdla_start(dev);
break;
case SDLA_STOP:
sdla_stop(dev);
break;
default:
return(-EOPNOTSUPP);
}
return(0);
}
static int sdla_change_mtu(struct net_device *dev, int new_mtu)
{
struct frad_local *flp;
flp = netdev_priv(dev);
if (netif_running(dev))
return(-EBUSY);
/* for now, you can't change the MTU! */
return(-EOPNOTSUPP);
}
static int sdla_set_config(struct net_device *dev, struct ifmap *map)
{
struct frad_local *flp;
int i;
char byte;
unsigned base;
int err = -EINVAL;
flp = netdev_priv(dev);
if (flp->initialized)
return(-EINVAL);
for(i=0; i < ARRAY_SIZE(valid_port); i++)
if (valid_port[i] == map->base_addr)
break;
if (i == ARRAY_SIZE(valid_port))
return(-EINVAL);
if (!request_region(map->base_addr, SDLA_IO_EXTENTS, dev->name)){
printk(KERN_WARNING "SDLA: io-port 0x%04lx in use \n", dev->base_addr);
return(-EINVAL);
}
base = map->base_addr;
/* test for card types, S502A, S502E, S507, S508 */
/* these tests shut down the card completely, so clear the state */
flp->type = SDLA_UNKNOWN;
flp->state = 0;
for(i=1;i<SDLA_IO_EXTENTS;i++)
if (inb(base + i) != 0xFF)
break;
if (i == SDLA_IO_EXTENTS) {
outb(SDLA_HALT, base + SDLA_REG_Z80_CONTROL);
if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x08) {
outb(SDLA_S502E_INTACK, base + SDLA_REG_CONTROL);
if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x0C) {
outb(SDLA_HALT, base + SDLA_REG_CONTROL);
flp->type = SDLA_S502E;
goto got_type;
}
}
}
for(byte=inb(base),i=0;i<SDLA_IO_EXTENTS;i++)
if (inb(base + i) != byte)
break;
if (i == SDLA_IO_EXTENTS) {
outb(SDLA_HALT, base + SDLA_REG_CONTROL);
if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x30) {
outb(SDLA_S507_ENABLE, base + SDLA_REG_CONTROL);
if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x32) {
outb(SDLA_HALT, base + SDLA_REG_CONTROL);
flp->type = SDLA_S507;
goto got_type;
}
}
}
outb(SDLA_HALT, base + SDLA_REG_CONTROL);
if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x00) {
outb(SDLA_S508_INTEN, base + SDLA_REG_CONTROL);
if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x10) {
outb(SDLA_HALT, base + SDLA_REG_CONTROL);
flp->type = SDLA_S508;
goto got_type;
}
}
outb(SDLA_S502A_HALT, base + SDLA_REG_CONTROL);
if (inb(base + SDLA_S502_STS) == 0x40) {
outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
if (inb(base + SDLA_S502_STS) == 0x40) {
outb(SDLA_S502A_INTEN, base + SDLA_REG_CONTROL);
if (inb(base + SDLA_S502_STS) == 0x44) {
outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
flp->type = SDLA_S502A;
goto got_type;
}
}
}
printk(KERN_NOTICE "%s: Unknown card type\n", dev->name);
err = -ENODEV;
goto fail;
got_type:
switch(base) {
case 0x270:
case 0x280:
case 0x380:
case 0x390:
if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
goto fail;
}
switch (map->irq) {
case 2:
if (flp->type != SDLA_S502E)
goto fail;
break;
case 10:
case 11:
case 12:
case 15:
case 4:
if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
goto fail;
break;
case 3:
case 5:
case 7:
if (flp->type == SDLA_S502A)
goto fail;
break;
default:
goto fail;
}
err = -EAGAIN;
if (request_irq(dev->irq, &sdla_isr, 0, dev->name, dev))
goto fail;
if (flp->type == SDLA_S507) {
switch(dev->irq) {
case 3:
flp->state = SDLA_S507_IRQ3;
break;
case 4:
flp->state = SDLA_S507_IRQ4;
break;
case 5:
flp->state = SDLA_S507_IRQ5;
break;
case 7:
flp->state = SDLA_S507_IRQ7;
break;
case 10:
flp->state = SDLA_S507_IRQ10;
break;
case 11:
flp->state = SDLA_S507_IRQ11;
break;
case 12:
flp->state = SDLA_S507_IRQ12;
break;
case 15:
flp->state = SDLA_S507_IRQ15;
break;
}
}
for(i=0; i < ARRAY_SIZE(valid_mem); i++)
if (valid_mem[i] == map->mem_start)
break;
err = -EINVAL;
if (i == ARRAY_SIZE(valid_mem))
goto fail2;
if (flp->type == SDLA_S502A && (map->mem_start & 0xF000) >> 12 == 0x0E)
goto fail2;
if (flp->type != SDLA_S507 && map->mem_start >> 16 == 0x0B)
goto fail2;
if (flp->type == SDLA_S507 && map->mem_start >> 16 == 0x0D)
goto fail2;
byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
switch(flp->type) {
case SDLA_S502A:
case SDLA_S502E:
switch (map->mem_start >> 16) {
case 0x0A:
byte |= SDLA_S502_SEG_A;
break;
case 0x0C:
byte |= SDLA_S502_SEG_C;
break;
case 0x0D:
byte |= SDLA_S502_SEG_D;
break;
case 0x0E:
byte |= SDLA_S502_SEG_E;
break;
}
break;
case SDLA_S507:
switch (map->mem_start >> 16) {
case 0x0A:
byte |= SDLA_S507_SEG_A;
break;
case 0x0B:
byte |= SDLA_S507_SEG_B;
break;
case 0x0C:
byte |= SDLA_S507_SEG_C;
break;
case 0x0E:
byte |= SDLA_S507_SEG_E;
break;
}
break;
case SDLA_S508:
switch (map->mem_start >> 16) {
case 0x0A:
byte |= SDLA_S508_SEG_A;
break;
case 0x0C:
byte |= SDLA_S508_SEG_C;
break;
case 0x0D:
byte |= SDLA_S508_SEG_D;
break;
case 0x0E:
byte |= SDLA_S508_SEG_E;
break;
}
break;
}
/* set the memory bits, and enable access */
outb(byte, base + SDLA_REG_PC_WINDOW);
switch(flp->type)
{
case SDLA_S502E:
flp->state = SDLA_S502E_ENABLE;
break;
case SDLA_S507:
flp->state |= SDLA_MEMEN;
break;
case SDLA_S508:
flp->state = SDLA_MEMEN;
break;
}
outb(flp->state, base + SDLA_REG_CONTROL);
dev->irq = map->irq;
dev->base_addr = base;
dev->mem_start = map->mem_start;
dev->mem_end = dev->mem_start + 0x2000;
flp->initialized = 1;
return 0;
fail2:
free_irq(map->irq, dev);
fail:
release_region(base, SDLA_IO_EXTENTS);
return err;
}
static const struct net_device_ops sdla_netdev_ops = {
.ndo_open = sdla_open,
.ndo_stop = sdla_close,
.ndo_do_ioctl = sdla_ioctl,
.ndo_set_config = sdla_set_config,
.ndo_start_xmit = sdla_transmit,
.ndo_change_mtu = sdla_change_mtu,
};
static void setup_sdla(struct net_device *dev)
{
struct frad_local *flp = netdev_priv(dev);
netdev_boot_setup_check(dev);
dev->netdev_ops = &sdla_netdev_ops;
dev->flags = 0;
dev->type = 0xFFFF;
dev->hard_header_len = 0;
dev->addr_len = 0;
dev->mtu = SDLA_MAX_MTU;
flp->activate = sdla_activate;
flp->deactivate = sdla_deactivate;
flp->assoc = sdla_assoc;
flp->deassoc = sdla_deassoc;
flp->dlci_conf = sdla_dlci_conf;
init_timer(&flp->timer);
flp->timer.expires = 1;
flp->timer.data = (unsigned long) dev;
flp->timer.function = sdla_poll;
}
static struct net_device *sdla;
static int __init init_sdla(void)
{
int err;
printk("%s.\n", version);
sdla = alloc_netdev(sizeof(struct frad_local), "sdla0", setup_sdla);
if (!sdla)
return -ENOMEM;
err = register_netdev(sdla);
if (err)
free_netdev(sdla);
return err;
}
static void __exit exit_sdla(void)
{
struct frad_local *flp = netdev_priv(sdla);
unregister_netdev(sdla);
if (flp->initialized) {
free_irq(sdla->irq, sdla);
release_region(sdla->base_addr, SDLA_IO_EXTENTS);
}
del_timer_sync(&flp->timer);
free_netdev(sdla);
}
MODULE_LICENSE("GPL");
module_init(init_sdla);
module_exit(exit_sdla);
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