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kernel-ark/drivers/net/wan/sdla.c
Jeff Garzik c31f28e778 drivers/net: eliminate irq handler impossible checks, needless casts 
- Eliminate check for irq handler 'dev_id==NULL' where the
  condition never occurs.

- Eliminate needless casts to/from void*

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-10-06 14:56:04 -04:00

1670 lines
38 KiB
C
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 = dev->priv;
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 = dev->priv;
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 = dev->priv;
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 = slave->priv;
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 = slave->priv;
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 = slave->priv;
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 = slave->priv;
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 = slave->priv;
for(i=0;i<CONFIG_DLCI_MAX;i++)
if (flp->master[i] == master)
break;
if (i == CONFIG_DLCI_MAX)
return(-ENODEV);
dlp = master->priv;
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 int 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 = dev->priv;
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:
flp->stats.tx_packets++;
ret = DLCI_RET_OK;
break;
case SDLA_RET_CIR_OVERFLOW:
case SDLA_RET_BUF_OVERSIZE:
case SDLA_RET_NO_BUFS:
flp->stats.tx_dropped++;
ret = DLCI_RET_DROP;
break;
default:
flp->stats.tx_errors++;
ret = DLCI_RET_ERR;
break;
}
}
netif_wake_queue(dev);
for(i=0;i<CONFIG_DLCI_MAX;i++)
{
if(flp->master[i]!=NULL)
netif_wake_queue(flp->master[i]);
}
return(ret);
}
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 = dev->priv;
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);
flp->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);
flp->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)
{
flp->stats.rx_packets++;
dlp = master->priv;
(*dlp->receive)(skb, master);
}
spin_unlock_irqrestore(&sdla_lock, flags);
}
static irqreturn_t sdla_isr(int irq, 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, 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 = dev->priv;
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 = dev->priv;
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 = dev->priv;
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 = flp->master[i]->priv;
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 = dev->priv;
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 = kmalloc(mem.len, GFP_KERNEL);
if (!temp)
return(-ENOMEM);
memset(temp, 0, mem.len);
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 = dev->priv;
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 = dev->priv;
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 = dev->priv;
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 = dev->priv;
if (flp->initialized)
return(-EINVAL);
for(i=0;i < sizeof(valid_port) / sizeof (int) ; i++)
if (valid_port[i] == map->base_addr)
break;
if (i == sizeof(valid_port) / sizeof(int))
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 < sizeof(valid_mem) / sizeof (int) ; i++)
if (valid_mem[i] == map->mem_start)
break;
err = -EINVAL;
if (i == sizeof(valid_mem) / sizeof(int))
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 struct net_device_stats *sdla_stats(struct net_device *dev)
{
struct frad_local *flp;
flp = dev->priv;
return(&flp->stats);
}
static void setup_sdla(struct net_device *dev)
{
struct frad_local *flp = dev->priv;
netdev_boot_setup_check(dev);
SET_MODULE_OWNER(dev);
dev->flags = 0;
dev->type = 0xFFFF;
dev->hard_header_len = 0;
dev->addr_len = 0;
dev->mtu = SDLA_MAX_MTU;
dev->open = sdla_open;
dev->stop = sdla_close;
dev->do_ioctl = sdla_ioctl;
dev->set_config = sdla_set_config;
dev->get_stats = sdla_stats;
dev->hard_start_xmit = sdla_transmit;
dev->change_mtu = sdla_change_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 = sdla->priv;
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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