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Diffstat (limited to '')
| -rw-r--r-- | drivers/net/wan/sdla.c | 1655 |
1 files changed, 1655 insertions, 0 deletions
diff --git a/drivers/net/wan/sdla.c b/drivers/net/wan/sdla.c new file mode 100644 index 000000000..bc2c1c7fb --- /dev/null +++ b/drivers/net/wan/sdla.c @@ -0,0 +1,1655 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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 + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#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/io.h> +#include <asm/dma.h> +#include <linux/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; +} __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) + netdev_info(dev, "Modem DCD unexpectedly low!\n"); + if (*state & SDLA_MODEM_CTS_LOW) + netdev_info(dev, "Modem CTS unexpectedly low!\n"); + /* I should probably do something about this! */ + break; + + case SDLA_RET_CHANNEL_OFF: + netdev_info(dev, "Channel became inoperative!\n"); + /* same here */ + break; + + case SDLA_RET_CHANNEL_ON: + netdev_info(dev, "Channel became operative!\n"); + /* same here */ + break; + + case SDLA_RET_DLCI_STATUS: + netdev_info(dev, "Status change reported by Access Node\n"); + 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; + } + netdev_info(dev, "DLCI %i: %s\n", + pstatus->dlci, state); + /* same here */ + } + break; + + case SDLA_RET_DLCI_UNKNOWN: + netdev_info(dev, "Received unknown DLCIs:"); + len /= sizeof(short); + for(pdlci = data,i=0;i < len;i++,pdlci++) + pr_cont(" %i", *pdlci); + pr_cont("\n"); + break; + + case SDLA_RET_TIMEOUT: + netdev_err(dev, "Command timed out!\n"); + break; + + case SDLA_RET_BUF_OVERSIZE: + netdev_info(dev, "Bc/CIR overflow, acceptable size is %i\n", + len); + break; + + case SDLA_RET_BUF_TOO_BIG: + netdev_info(dev, "Buffer size over specified max of %i\n", + 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; + fallthrough; + + default: + netdev_dbg(dev, "Cmd 0x%02X generated return code 0x%02X\n", + 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) + { + netdev_warn(dev, "Non DLCI device, type %i, tried to send on FRAD module\n", + skb->dev->type); + accept = 0; + } + break; + default: + netdev_warn(dev, "unknown firmware type 0x%04X\n", + 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 *)(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) + { + netdev_notice(dev, "Received packet from invalid DLCI %i, ignoring\n", + dlci); + dev->stats.rx_errors++; + success = 0; + } + } + + if (success) + { + master = flp->master[i]; + skb = dev_alloc_skb(len + sizeof(struct frhdr)); + if (skb == NULL) + { + netdev_notice(dev, "Memory squeeze, dropping packet\n"); + 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) + { + netdev_warn(dev, "irq %d for uninitialized device\n", 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: + netdev_warn(dev, "invalid irq flag 0x%02X\n", 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(struct timer_list *t) +{ + struct frad_local *flp = from_timer(flp, t, timer); + struct net_device *dev = flp->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 = memdup_user(mem.data, mem.len); + if (IS_ERR(temp)) + return PTR_ERR(temp); + 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) +{ + 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)){ + pr_warn("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; + } + } + } + + netdev_notice(dev, "Unknown card type\n"); + 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; + flp->dev = dev; + + timer_setup(&flp->timer, sdla_poll, 0); + flp->timer.expires = 1; +} + +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", + NET_NAME_UNKNOWN, 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); |