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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [net/] [sdla.c] - Rev 1765
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/* * 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/config.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/sched.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/malloc.h> #include <linux/string.h> #include <linux/timer.h> #include <linux/errno.h> #include <asm/system.h> #include <asm/bitops.h> #include <asm/io.h> #include <asm/dma.h> #include <linux/netdevice.h> #include <linux/skbuff.h> #include <linux/if_arp.h> #include <linux/if_frad.h> #include <linux/sdla.h> static const char* version = "SDLA driver v0.30, 12 Sep 1996, mike.mclagan@linux.org"; static const char* devname = "sdla"; 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}; /********************************************************* * * 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 device *dev, int addr, void *buf, short len) { unsigned long flags; char *temp, *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); save_flags(flags); cli(); SDLA_WINDOW(dev, addr); memcpy(temp, base, bytes); restore_flags(flags); addr += bytes; temp += bytes; len -= bytes; } } static void sdla_write(struct device *dev, int addr, void *buf, short len) { unsigned long flags; char *temp, *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); save_flags(flags); cli(); SDLA_WINDOW(dev, addr); memcpy(base, temp, bytes); restore_flags(flags); addr += bytes; temp += bytes; len -= bytes; } } static void sdla_clear(struct device *dev) { unsigned long flags; char *base; int len, addr, bytes; len = 65536; addr = 0; bytes = SDLA_WINDOW_SIZE; base = (void *) dev->mem_start; save_flags(flags); cli(); while(len) { SDLA_WINDOW(dev, addr); memset(base, 0, bytes); addr += bytes; len -= bytes; } restore_flags(flags); } static char sdla_byte(struct device *dev, int addr) { unsigned long flags; char byte, *temp; temp = (void *) (dev->mem_start + (addr & SDLA_ADDR_MASK)); save_flags(flags); cli(); SDLA_WINDOW(dev, addr); byte = *temp; restore_flags(flags); return(byte); } void sdla_stop(struct 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; } } void sdla_start(struct 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 * ***************************************************/ int sdla_z80_poll(struct 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 ((jiffies < done) && (resp != resp1) && (!resp2 || (resp != resp2))) { if (jiffies != now) { SDLA_WINDOW(dev, z80_addr); now = jiffies; resp = *temp; } } return(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 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) 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 __attribute__((packed)); char flags __attribute__((packed)); }; struct _frad_stat { char flags; struct _dlci_stat dlcis[SDLA_MAX_DLCI]; }; static void sdla_errors(struct 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 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; int jiffs, 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 */ save_flags(pflags); cli(); 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; restore_flags(pflags); waiting = 1; len = 0; while (waiting && (jiffies <= jiffs)) { if (waiting++ % 3) { save_flags(pflags); cli(); SDLA_WINDOW(dev, window); waiting = ((volatile int)(cmd_buf->opp_flag)); restore_flags(pflags); } } if (!waiting) { save_flags(pflags); cli(); 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); restore_flags(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 device *dev); int sdla_activate(struct device *slave, struct 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 (slave->start && (flp->config.station == FRAD_STATION_NODE)) sdla_cmd(slave, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL); return(0); } int sdla_deactivate(struct device *slave, struct 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 (slave->start && (flp->config.station == FRAD_STATION_NODE)) sdla_cmd(slave, SDLA_DEACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL); return(0); } int sdla_assoc(struct device *slave, struct 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 ?? */ MOD_INC_USE_COUNT; flp->master[i] = master; flp->dlci[i] = -*(short *)(master->dev_addr); master->mtu = slave->mtu; if (slave->start) { 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); } int sdla_deassoc(struct device *slave, struct 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; MOD_DEC_USE_COUNT; if (slave->start) { 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); } int sdla_dlci_conf(struct device *slave, struct 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 (slave->start) { 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 device *dev) { struct frad_local *flp; int ret, addr, accept; short size; unsigned long flags; struct buf_entry *pbuf; flp = dev->priv; ret = 0; accept = 1; if (dev->tbusy) return(1); if (skb == NULL) return(0); if (set_bit(0, (void*)&dev->tbusy) != 0) { printk(KERN_WARNING "%s: transmitter access conflict.\n", dev->name); dev_kfree_skb(skb, FREE_WRITE); } else { /* * 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) { save_flags(flags); cli(); 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; restore_flags(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; } } dev->tbusy = 0; } return(ret); } static void sdla_receive(struct device *dev) { struct 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, 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; save_flags(flags); cli(); 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); } restore_flags(flags); } static void sdla_isr(int irq, void *dev_id, struct pt_regs * regs) { struct device *dev; struct frad_local *flp; char byte; dev = irq2dev_map[irq]; if (dev == NULL) { printk(KERN_WARNING "sdla_isr(): irq %d for unknown device.\n", irq); return; } flp = dev->priv; if (!flp->initialized) { printk(KERN_WARNING "%s: irq %d for uninitialized device.\n", dev->name, irq); return; } dev->interrupt = 1; 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)); dev->interrupt = 0; } static void sdla_poll(unsigned long device) { struct device *dev; struct frad_local *flp; dev = (struct 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 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); dev->tbusy = 1; dev->start = 0; MOD_DEC_USE_COUNT; return(0); } struct conf_data { struct frad_conf config; short dlci[CONFIG_DLCI_MAX]; }; static int sdla_open(struct 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); } dev->tbusy = 0; dev->interrupt = 0; dev->start = 1; MOD_INC_USE_COUNT; return(0); } static int sdla_config(struct device *dev, struct frad_conf *conf, int get) { struct frad_local *flp; struct conf_data data; int i, err; short size; if (dev->type == 0xFFFF) return(-EUNATCH); flp = dev->priv; if (!get) { if (dev->start) return(-EBUSY); err = verify_area(VERIFY_READ, conf, sizeof(struct frad_conf)); if (err) return(err); memcpy_fromfs(&data.config, conf, sizeof(struct frad_conf)); 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 { err = verify_area(VERIFY_WRITE, conf, sizeof(struct frad_conf)); if (err) return(err); /* no sense reading if the CPU isn't started */ if (dev->start) { 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; memcpy_tofs(conf, &data.config, sizeof(struct frad_conf)); } return(0); } static int sdla_xfer(struct device *dev, struct sdla_mem *info, int read) { struct sdla_mem mem; int err; char *temp; err = verify_area(VERIFY_READ, info, sizeof(struct sdla_mem)); if (err) return(err); memcpy_fromfs(&mem, info, sizeof(mem)); if (read) { err = verify_area(VERIFY_WRITE, mem.data, mem.len); if (err) return(err); temp = kmalloc(mem.len, GFP_KERNEL); if (!temp) return(-ENOMEM); sdla_read(dev, mem.addr, temp, mem.len); memcpy_tofs(mem.data, temp, mem.len); kfree(temp); } else { err = verify_area(VERIFY_READ, mem.data, mem.len); if (err) return(err); temp = kmalloc(mem.len, GFP_KERNEL); if (!temp) return(-ENOMEM); memcpy_fromfs(temp, mem.data, mem.len); sdla_write(dev, mem.addr, temp, mem.len); kfree(temp); } return(0); } static int sdla_reconfig(struct 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 device *dev, struct ifreq *ifr, int cmd) { struct frad_local *flp; flp = dev->priv; if (!flp->initialized) return(-EPERM); switch (cmd) { case FRAD_GET_CONF: case FRAD_SET_CONF: return(sdla_config(dev, (struct frad_conf *)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; dev->family = AF_UNSPEC; break; default: return(-ENOPROTOOPT); } break; case SDLA_CLEARMEM: sdla_clear(dev); break; case SDLA_WRITEMEM: case SDLA_READMEM: return(sdla_xfer(dev, (struct sdla_mem *)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); } int sdla_change_mtu(struct device *dev, int new_mtu) { struct frad_local *flp; flp = dev->priv; if (dev->start) return(-EBUSY); /* for now, you can't change the MTU! */ return(-EACCES); } int sdla_set_config(struct device *dev, struct ifmap *map) { struct frad_local *flp; int i; char byte; 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); dev->base_addr = map->base_addr; request_region(dev->base_addr, SDLA_IO_EXTENTS, dev->name); /* 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(dev->base_addr + i) != 0xFF) break; if (i == SDLA_IO_EXTENTS) { outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL); if ((inb(dev->base_addr + SDLA_S502_STS) & 0x0F) == 0x08) { outb(SDLA_S502E_INTACK, dev->base_addr + SDLA_REG_CONTROL); if ((inb(dev->base_addr + SDLA_S502_STS) & 0x0F) == 0x0C) { outb(SDLA_HALT, dev->base_addr + SDLA_REG_CONTROL); flp->type = SDLA_S502E; } } } if (flp->type == SDLA_UNKNOWN) { for(byte=inb(dev->base_addr),i=0;i<SDLA_IO_EXTENTS;i++) if (inb(dev->base_addr + i) != byte) break; if (i == SDLA_IO_EXTENTS) { outb(SDLA_HALT, dev->base_addr + SDLA_REG_CONTROL); if ((inb(dev->base_addr + SDLA_S502_STS) & 0x7E) == 0x30) { outb(SDLA_S507_ENABLE, dev->base_addr + SDLA_REG_CONTROL); if ((inb(dev->base_addr + SDLA_S502_STS) & 0x7E) == 0x32) { outb(SDLA_HALT, dev->base_addr + SDLA_REG_CONTROL); flp->type = SDLA_S507; } } } } if (flp->type == SDLA_UNKNOWN) { outb(SDLA_HALT, dev->base_addr + SDLA_REG_CONTROL); if ((inb(dev->base_addr + SDLA_S508_STS) & 0x3F) == 0x00) { outb(SDLA_S508_INTEN, dev->base_addr + SDLA_REG_CONTROL); if ((inb(dev->base_addr + SDLA_S508_STS) & 0x3F) == 0x10) { outb(SDLA_HALT, dev->base_addr + SDLA_REG_CONTROL); flp->type = SDLA_S508; } } } if (flp->type == SDLA_UNKNOWN) { outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL); if (inb(dev->base_addr + SDLA_S502_STS) == 0x40) { outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL); if (inb(dev->base_addr + SDLA_S502_STS) == 0x40) { outb(SDLA_S502A_INTEN, dev->base_addr + SDLA_REG_CONTROL); if (inb(dev->base_addr + SDLA_S502_STS) == 0x44) { outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL); flp->type = SDLA_S502A; } } } } if (flp->type == SDLA_UNKNOWN) { printk(KERN_NOTICE "%s: Unknown card type\n", dev->name); return(-ENODEV); } switch(dev->base_addr) { case 0x270: case 0x280: case 0x380: case 0x390: if ((flp->type != SDLA_S508) && (flp->type != SDLA_S507)) return(-EINVAL); } switch (map->irq) { case 2: if (flp->type != SDLA_S502E) return(-EINVAL); break; case 10: case 11: case 12: case 15: case 4: if ((flp->type != SDLA_S508) && (flp->type != SDLA_S507)) return(-EINVAL); case 3: case 5: case 7: if (flp->type == SDLA_S502A) return(-EINVAL); break; default: return(-EINVAL); } dev->irq = map->irq; if (request_irq(dev->irq, &sdla_isr, 0, dev->name, NULL)) return(-EADDRINUSE); irq2dev_map[dev->irq] = dev; 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; if (i == sizeof(valid_mem) / sizeof(int)) return(-EINVAL); if ((flp->type == SDLA_S502A) && (((map->mem_start & 0xF000) >> 12) == 0x0E)) return(-EINVAL); if ((flp->type != SDLA_S507) && ((map->mem_start >> 16) == 0x0B)) return(-EINVAL); if ((flp->type == SDLA_S507) && ((map->mem_start >> 16) == 0x0D)) return(-EINVAL); dev->mem_start = map->mem_start; dev->mem_end = dev->mem_start + 0x2000; 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, dev->base_addr + 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, dev->base_addr + SDLA_REG_CONTROL); flp->initialized = 1; return(0); } static struct enet_statistics *sdla_stats(struct device *dev) { struct frad_local *flp; flp = dev->priv; return(&flp->stats); } int sdla_init(struct device *dev) { struct frad_local *flp; int i; /* allocate the private data structure */ flp = kmalloc(sizeof(struct frad_local), GFP_KERNEL); if (!flp) return(-ENOMEM); memset(flp, 0, sizeof(struct frad_local)); dev->priv = flp; dev->flags = 0; 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; dev->type = 0xFFFF; dev->family = AF_UNSPEC; dev->pa_alen = 0; dev->pa_addr = 0; dev->pa_dstaddr = 0; dev->pa_brdaddr = 0; dev->pa_mask = 0; dev->hard_header_len = 0; dev->addr_len = 0; dev->mtu = SDLA_MAX_MTU; for (i = 0; i < DEV_NUMBUFFS; i++) skb_queue_head_init(&dev->buffs[i]); 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; return(0); } void sdla_setup(void) { printk("%s.\n", version); register_frad(devname); } #ifdef MODULE static struct device sdla0 = {"sdla0", 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, sdla_init}; int init_module(void) { int result; sdla_setup(); if ((result = register_netdev(&sdla0)) != 0) return result; return 0; } void cleanup_module(void) { unregister_netdev(&sdla0); if (sdla0.priv) kfree(sdla0.priv); if (sdla0.irq) free_irq(sdla0.irq, NULL); } #endif /* MODULE */