diff options
Diffstat (limited to 'drivers/isdn/pcbit/drv.c')
| -rw-r--r-- | drivers/isdn/pcbit/drv.c | 1077 |
1 files changed, 1077 insertions, 0 deletions
diff --git a/drivers/isdn/pcbit/drv.c b/drivers/isdn/pcbit/drv.c new file mode 100644 index 000000000..4172e22ae --- /dev/null +++ b/drivers/isdn/pcbit/drv.c @@ -0,0 +1,1077 @@ +/* + * PCBIT-D interface with isdn4linux + * + * Copyright (C) 1996 Universidade de Lisboa + * + * Written by Pedro Roque Marques (roque@di.fc.ul.pt) + * + * This software may be used and distributed according to the terms of + * the GNU General Public License, incorporated herein by reference. + */ + +/* + * Fixes: + * + * Nuno Grilo <l38486@alfa.ist.utl.pt> + * fixed msn_list NULL pointer dereference. + * + */ + +#include <linux/module.h> + + +#include <linux/kernel.h> + +#include <linux/types.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/string.h> +#include <linux/skbuff.h> + +#include <linux/isdnif.h> +#include <asm/string.h> +#include <asm/io.h> +#include <linux/ioport.h> + +#include "pcbit.h" +#include "edss1.h" +#include "layer2.h" +#include "capi.h" + + +extern ushort last_ref_num; + +static int pcbit_ioctl(isdn_ctrl *ctl); + +static char *pcbit_devname[MAX_PCBIT_CARDS] = { + "pcbit0", + "pcbit1", + "pcbit2", + "pcbit3" +}; + +/* + * prototypes + */ + +static int pcbit_command(isdn_ctrl *ctl); +static int pcbit_stat(u_char __user *buf, int len, int, int); +static int pcbit_xmit(int driver, int chan, int ack, struct sk_buff *skb); +static int pcbit_writecmd(const u_char __user *, int, int, int); + +static int set_protocol_running(struct pcbit_dev *dev); + +static void pcbit_clear_msn(struct pcbit_dev *dev); +static void pcbit_set_msn(struct pcbit_dev *dev, char *list); +static int pcbit_check_msn(struct pcbit_dev *dev, char *msn); + + +int pcbit_init_dev(int board, int mem_base, int irq) +{ + struct pcbit_dev *dev; + isdn_if *dev_if; + + if ((dev = kzalloc(sizeof(struct pcbit_dev), GFP_KERNEL)) == NULL) + { + printk("pcbit_init: couldn't malloc pcbit_dev struct\n"); + return -ENOMEM; + } + + dev_pcbit[board] = dev; + init_waitqueue_head(&dev->set_running_wq); + spin_lock_init(&dev->lock); + + if (mem_base >= 0xA0000 && mem_base <= 0xFFFFF) { + dev->ph_mem = mem_base; + if (!request_mem_region(dev->ph_mem, 4096, "PCBIT mem")) { + printk(KERN_WARNING + "PCBIT: memory region %lx-%lx already in use\n", + dev->ph_mem, dev->ph_mem + 4096); + kfree(dev); + dev_pcbit[board] = NULL; + return -EACCES; + } + dev->sh_mem = ioremap(dev->ph_mem, 4096); + } + else + { + printk("memory address invalid"); + kfree(dev); + dev_pcbit[board] = NULL; + return -EACCES; + } + + dev->b1 = kzalloc(sizeof(struct pcbit_chan), GFP_KERNEL); + if (!dev->b1) { + printk("pcbit_init: couldn't malloc pcbit_chan struct\n"); + iounmap(dev->sh_mem); + release_mem_region(dev->ph_mem, 4096); + kfree(dev); + return -ENOMEM; + } + + dev->b2 = kzalloc(sizeof(struct pcbit_chan), GFP_KERNEL); + if (!dev->b2) { + printk("pcbit_init: couldn't malloc pcbit_chan struct\n"); + kfree(dev->b1); + iounmap(dev->sh_mem); + release_mem_region(dev->ph_mem, 4096); + kfree(dev); + return -ENOMEM; + } + + dev->b2->id = 1; + + INIT_WORK(&dev->qdelivery, pcbit_deliver); + + /* + * interrupts + */ + + if (request_irq(irq, &pcbit_irq_handler, 0, pcbit_devname[board], dev) != 0) + { + kfree(dev->b1); + kfree(dev->b2); + iounmap(dev->sh_mem); + release_mem_region(dev->ph_mem, 4096); + kfree(dev); + dev_pcbit[board] = NULL; + return -EIO; + } + + dev->irq = irq; + + /* next frame to be received */ + dev->rcv_seq = 0; + dev->send_seq = 0; + dev->unack_seq = 0; + + dev->hl_hdrlen = 16; + + dev_if = kmalloc(sizeof(isdn_if), GFP_KERNEL); + + if (!dev_if) { + free_irq(irq, dev); + kfree(dev->b1); + kfree(dev->b2); + iounmap(dev->sh_mem); + release_mem_region(dev->ph_mem, 4096); + kfree(dev); + dev_pcbit[board] = NULL; + return -EIO; + } + + dev->dev_if = dev_if; + + dev_if->owner = THIS_MODULE; + + dev_if->channels = 2; + + dev_if->features = (ISDN_FEATURE_P_EURO | ISDN_FEATURE_L3_TRANS | + ISDN_FEATURE_L2_HDLC | ISDN_FEATURE_L2_TRANS); + + dev_if->writebuf_skb = pcbit_xmit; + dev_if->hl_hdrlen = 16; + + dev_if->maxbufsize = MAXBUFSIZE; + dev_if->command = pcbit_command; + + dev_if->writecmd = pcbit_writecmd; + dev_if->readstat = pcbit_stat; + + + strcpy(dev_if->id, pcbit_devname[board]); + + if (!register_isdn(dev_if)) { + free_irq(irq, dev); + kfree(dev->b1); + kfree(dev->b2); + iounmap(dev->sh_mem); + release_mem_region(dev->ph_mem, 4096); + kfree(dev); + dev_pcbit[board] = NULL; + return -EIO; + } + + dev->id = dev_if->channels; + + + dev->l2_state = L2_DOWN; + dev->free = 511; + + /* + * set_protocol_running(dev); + */ + + return 0; +} + +#ifdef MODULE +void pcbit_terminate(int board) +{ + struct pcbit_dev *dev; + + dev = dev_pcbit[board]; + + if (dev) { + /* unregister_isdn(dev->dev_if); */ + free_irq(dev->irq, dev); + pcbit_clear_msn(dev); + kfree(dev->dev_if); + if (dev->b1->fsm_timer.function) + del_timer(&dev->b1->fsm_timer); + if (dev->b2->fsm_timer.function) + del_timer(&dev->b2->fsm_timer); + kfree(dev->b1); + kfree(dev->b2); + iounmap(dev->sh_mem); + release_mem_region(dev->ph_mem, 4096); + kfree(dev); + } +} +#endif + +static int pcbit_command(isdn_ctrl *ctl) +{ + struct pcbit_dev *dev; + struct pcbit_chan *chan; + struct callb_data info; + + dev = finddev(ctl->driver); + + if (!dev) + { + printk("pcbit_command: unknown device\n"); + return -1; + } + + chan = (ctl->arg & 0x0F) ? dev->b2 : dev->b1; + + + switch (ctl->command) { + case ISDN_CMD_IOCTL: + return pcbit_ioctl(ctl); + break; + case ISDN_CMD_DIAL: + info.type = EV_USR_SETUP_REQ; + info.data.setup.CalledPN = (char *) &ctl->parm.setup.phone; + pcbit_fsm_event(dev, chan, EV_USR_SETUP_REQ, &info); + break; + case ISDN_CMD_ACCEPTD: + pcbit_fsm_event(dev, chan, EV_USR_SETUP_RESP, NULL); + break; + case ISDN_CMD_ACCEPTB: + printk("ISDN_CMD_ACCEPTB - not really needed\n"); + break; + case ISDN_CMD_HANGUP: + pcbit_fsm_event(dev, chan, EV_USR_RELEASE_REQ, NULL); + break; + case ISDN_CMD_SETL2: + chan->proto = (ctl->arg >> 8); + break; + case ISDN_CMD_CLREAZ: + pcbit_clear_msn(dev); + break; + case ISDN_CMD_SETEAZ: + pcbit_set_msn(dev, ctl->parm.num); + break; + case ISDN_CMD_SETL3: + if ((ctl->arg >> 8) != ISDN_PROTO_L3_TRANS) + printk(KERN_DEBUG "L3 protocol unknown\n"); + break; + default: + printk(KERN_DEBUG "pcbit_command: unknown command\n"); + break; + }; + + return 0; +} + +/* + * Another Hack :-( + * on some conditions the board stops sending TDATA_CONFs + * let's see if we can turn around the problem + */ + +#ifdef BLOCK_TIMER +static void pcbit_block_timer(unsigned long data) +{ + struct pcbit_chan *chan; + struct pcbit_dev *dev; + isdn_ctrl ictl; + + chan = (struct pcbit_chan *)data; + + dev = chan2dev(chan); + + if (dev == NULL) { + printk(KERN_DEBUG "pcbit: chan2dev failed\n"); + return; + } + + del_timer(&chan->block_timer); + chan->block_timer.function = NULL; + +#ifdef DEBUG + printk(KERN_DEBUG "pcbit_block_timer\n"); +#endif + chan->queued = 0; + ictl.driver = dev->id; + ictl.command = ISDN_STAT_BSENT; + ictl.arg = chan->id; + dev->dev_if->statcallb(&ictl); +} +#endif + +static int pcbit_xmit(int driver, int chnum, int ack, struct sk_buff *skb) +{ + ushort hdrlen; + int refnum, len; + struct pcbit_chan *chan; + struct pcbit_dev *dev; + + dev = finddev(driver); + if (dev == NULL) + { + printk("finddev returned NULL"); + return -1; + } + + chan = chnum ? dev->b2 : dev->b1; + + + if (chan->fsm_state != ST_ACTIVE) + return -1; + + if (chan->queued >= MAX_QUEUED) + { +#ifdef DEBUG_QUEUE + printk(KERN_DEBUG + "pcbit: %d packets already in queue - write fails\n", + chan->queued); +#endif + /* + * packet stays on the head of the device queue + * since dev_start_xmit will fail + * see net/core/dev.c + */ +#ifdef BLOCK_TIMER + if (chan->block_timer.function == NULL) { + init_timer(&chan->block_timer); + chan->block_timer.function = &pcbit_block_timer; + chan->block_timer.data = (long) chan; + chan->block_timer.expires = jiffies + 1 * HZ; + add_timer(&chan->block_timer); + } +#endif + return 0; + } + + + chan->queued++; + + len = skb->len; + + hdrlen = capi_tdata_req(chan, skb); + + refnum = last_ref_num++ & 0x7fffU; + chan->s_refnum = refnum; + + pcbit_l2_write(dev, MSG_TDATA_REQ, refnum, skb, hdrlen); + + return len; +} + +static int pcbit_writecmd(const u_char __user *buf, int len, int driver, int channel) +{ + struct pcbit_dev *dev; + int i, j; + const u_char *loadbuf; + u_char *ptr = NULL; + u_char *cbuf; + + int errstat; + + dev = finddev(driver); + + if (!dev) + { + printk("pcbit_writecmd: couldn't find device"); + return -ENODEV; + } + + switch (dev->l2_state) { + case L2_LWMODE: + /* check (size <= rdp_size); write buf into board */ + if (len < 0 || len > BANK4 + 1 || len > 1024) + { + printk("pcbit_writecmd: invalid length %d\n", len); + return -EINVAL; + } + + cbuf = memdup_user(buf, len); + if (IS_ERR(cbuf)) + return PTR_ERR(cbuf); + + memcpy_toio(dev->sh_mem, cbuf, len); + kfree(cbuf); + return len; + case L2_FWMODE: + /* this is the hard part */ + /* dumb board */ + /* get it into kernel space */ + if ((ptr = kmalloc(len, GFP_KERNEL)) == NULL) + return -ENOMEM; + if (copy_from_user(ptr, buf, len)) { + kfree(ptr); + return -EFAULT; + } + loadbuf = ptr; + + errstat = 0; + + for (i = 0; i < len; i++) + { + for (j = 0; j < LOAD_RETRY; j++) + if (!(readb(dev->sh_mem + dev->loadptr))) + break; + + if (j == LOAD_RETRY) + { + errstat = -ETIME; + printk("TIMEOUT i=%d\n", i); + break; + } + writeb(loadbuf[i], dev->sh_mem + dev->loadptr + 1); + writeb(0x01, dev->sh_mem + dev->loadptr); + + dev->loadptr += 2; + if (dev->loadptr > LOAD_ZONE_END) + dev->loadptr = LOAD_ZONE_START; + } + kfree(ptr); + + return errstat ? errstat : len; + default: + return -EBUSY; + } +} + +/* + * demultiplexing of messages + * + */ + +void pcbit_l3_receive(struct pcbit_dev *dev, ulong msg, + struct sk_buff *skb, + ushort hdr_len, ushort refnum) +{ + struct pcbit_chan *chan; + struct sk_buff *skb2; + unsigned short len; + struct callb_data cbdata; + int complete, err; + isdn_ctrl ictl; + + switch (msg) { + + case MSG_TDATA_IND: + if (!(chan = capi_channel(dev, skb))) { + printk(KERN_WARNING + "CAPI header: unknown channel id\n"); + break; + } + chan->r_refnum = skb->data[7]; + skb_pull(skb, 8); + + dev->dev_if->rcvcallb_skb(dev->id, chan->id, skb); + + if (capi_tdata_resp(chan, &skb2) > 0) + pcbit_l2_write(dev, MSG_TDATA_RESP, refnum, + skb2, skb2->len); + return; + break; + case MSG_TDATA_CONF: + if (!(chan = capi_channel(dev, skb))) { + printk(KERN_WARNING + "CAPI header: unknown channel id\n"); + break; + } + +#ifdef DEBUG + if ((*((ushort *)(skb->data + 2))) != 0) { + printk(KERN_DEBUG "TDATA_CONF error\n"); + } +#endif +#ifdef BLOCK_TIMER + if (chan->queued == MAX_QUEUED) { + del_timer(&chan->block_timer); + chan->block_timer.function = NULL; + } + +#endif + chan->queued--; + + ictl.driver = dev->id; + ictl.command = ISDN_STAT_BSENT; + ictl.arg = chan->id; + dev->dev_if->statcallb(&ictl); + break; + + case MSG_CONN_IND: + /* + * channel: 1st not used will do + * if both are used we're in trouble + */ + + if (!dev->b1->fsm_state) + chan = dev->b1; + else if (!dev->b2->fsm_state) + chan = dev->b2; + else { + printk(KERN_INFO + "Incoming connection: no channels available"); + + if ((len = capi_disc_req(*(ushort *)(skb->data), &skb2, CAUSE_NOCHAN)) > 0) + pcbit_l2_write(dev, MSG_DISC_REQ, refnum, skb2, len); + break; + } + + cbdata.data.setup.CalledPN = NULL; + cbdata.data.setup.CallingPN = NULL; + + capi_decode_conn_ind(chan, skb, &cbdata); + cbdata.type = EV_NET_SETUP; + + pcbit_fsm_event(dev, chan, EV_NET_SETUP, NULL); + + if (pcbit_check_msn(dev, cbdata.data.setup.CallingPN)) + pcbit_fsm_event(dev, chan, EV_USR_PROCED_REQ, &cbdata); + else + pcbit_fsm_event(dev, chan, EV_USR_RELEASE_REQ, NULL); + + kfree(cbdata.data.setup.CalledPN); + kfree(cbdata.data.setup.CallingPN); + break; + + case MSG_CONN_CONF: + /* + * We should be able to find the channel by the message + * reference number. The current version of the firmware + * doesn't sent the ref number correctly. + */ +#ifdef DEBUG + printk(KERN_DEBUG "refnum=%04x b1=%04x b2=%04x\n", refnum, + dev->b1->s_refnum, + dev->b2->s_refnum); +#endif + /* We just try to find a channel in the right state */ + + if (dev->b1->fsm_state == ST_CALL_INIT) + chan = dev->b1; + else { + if (dev->b2->s_refnum == ST_CALL_INIT) + chan = dev->b2; + else { + chan = NULL; + printk(KERN_WARNING "Connection Confirm - no channel in Call Init state\n"); + break; + } + } + if (capi_decode_conn_conf(chan, skb, &complete)) { + printk(KERN_DEBUG "conn_conf indicates error\n"); + pcbit_fsm_event(dev, chan, EV_ERROR, NULL); + } + else + if (complete) + pcbit_fsm_event(dev, chan, EV_NET_CALL_PROC, NULL); + else + pcbit_fsm_event(dev, chan, EV_NET_SETUP_ACK, NULL); + break; + case MSG_CONN_ACTV_IND: + + if (!(chan = capi_channel(dev, skb))) { + printk(KERN_WARNING + "CAPI header: unknown channel id\n"); + break; + } + + if (capi_decode_conn_actv_ind(chan, skb)) { + printk("error in capi_decode_conn_actv_ind\n"); + /* pcbit_fsm_event(dev, chan, EV_ERROR, NULL); */ + break; + } + chan->r_refnum = refnum; + pcbit_fsm_event(dev, chan, EV_NET_CONN, NULL); + break; + case MSG_CONN_ACTV_CONF: + + if (!(chan = capi_channel(dev, skb))) { + printk(KERN_WARNING + "CAPI header: unknown channel id\n"); + break; + } + + if (capi_decode_conn_actv_conf(chan, skb) == 0) + pcbit_fsm_event(dev, chan, EV_NET_CONN_ACK, NULL); + + else + printk(KERN_DEBUG "decode_conn_actv_conf failed\n"); + break; + + case MSG_SELP_CONF: + + if (!(chan = capi_channel(dev, skb))) { + printk(KERN_WARNING + "CAPI header: unknown channel id\n"); + break; + } + + if (!(err = capi_decode_sel_proto_conf(chan, skb))) + pcbit_fsm_event(dev, chan, EV_NET_SELP_RESP, NULL); + else { + /* Error */ + printk("error %d - capi_decode_sel_proto_conf\n", err); + } + break; + case MSG_ACT_TRANSP_CONF: + if (!(chan = capi_channel(dev, skb))) { + printk(KERN_WARNING + "CAPI header: unknown channel id\n"); + break; + } + + if (!capi_decode_actv_trans_conf(chan, skb)) + pcbit_fsm_event(dev, chan, EV_NET_ACTV_RESP, NULL); + break; + + case MSG_DISC_IND: + + if (!(chan = capi_channel(dev, skb))) { + printk(KERN_WARNING + "CAPI header: unknown channel id\n"); + break; + } + + if (!capi_decode_disc_ind(chan, skb)) + pcbit_fsm_event(dev, chan, EV_NET_DISC, NULL); + else + printk(KERN_WARNING "capi_decode_disc_ind - error\n"); + break; + case MSG_DISC_CONF: + if (!(chan = capi_channel(dev, skb))) { + printk(KERN_WARNING + "CAPI header: unknown channel id\n"); + break; + } + + if (!capi_decode_disc_ind(chan, skb)) + pcbit_fsm_event(dev, chan, EV_NET_RELEASE, NULL); + else + printk(KERN_WARNING "capi_decode_disc_conf - error\n"); + break; + case MSG_INFO_IND: +#ifdef DEBUG + printk(KERN_DEBUG "received Info Indication - discarded\n"); +#endif + break; +#ifdef DEBUG + case MSG_DEBUG_188: + capi_decode_debug_188(skb->data, skb->len); + break; + + default: + printk(KERN_DEBUG "pcbit_l3_receive: unknown message %08lx\n", + msg); + break; +#endif + } + + kfree_skb(skb); + +} + +/* + * Single statbuf + * should be a statbuf per device + */ + +static char statbuf[STATBUF_LEN]; +static int stat_st = 0; +static int stat_end = 0; + +static int pcbit_stat(u_char __user *buf, int len, int driver, int channel) +{ + int stat_count; + stat_count = stat_end - stat_st; + + if (stat_count < 0) + stat_count = STATBUF_LEN - stat_st + stat_end; + + /* FIXME: should we sleep and wait for more cookies ? */ + if (len > stat_count) + len = stat_count; + + if (stat_st < stat_end) + { + if (copy_to_user(buf, statbuf + stat_st, len)) + return -EFAULT; + stat_st += len; + } + else + { + if (len > STATBUF_LEN - stat_st) + { + if (copy_to_user(buf, statbuf + stat_st, + STATBUF_LEN - stat_st)) + return -EFAULT; + if (copy_to_user(buf, statbuf, + len - (STATBUF_LEN - stat_st))) + return -EFAULT; + + stat_st = len - (STATBUF_LEN - stat_st); + } + else + { + if (copy_to_user(buf, statbuf + stat_st, len)) + return -EFAULT; + + stat_st += len; + + if (stat_st == STATBUF_LEN) + stat_st = 0; + } + } + + if (stat_st == stat_end) + stat_st = stat_end = 0; + + return len; +} + +static void pcbit_logstat(struct pcbit_dev *dev, char *str) +{ + int i; + isdn_ctrl ictl; + + for (i = stat_end; i < strlen(str); i++) + { + statbuf[i] = str[i]; + stat_end = (stat_end + 1) % STATBUF_LEN; + if (stat_end == stat_st) + stat_st = (stat_st + 1) % STATBUF_LEN; + } + + ictl.command = ISDN_STAT_STAVAIL; + ictl.driver = dev->id; + ictl.arg = strlen(str); + dev->dev_if->statcallb(&ictl); +} + +void pcbit_state_change(struct pcbit_dev *dev, struct pcbit_chan *chan, + unsigned short i, unsigned short ev, unsigned short f) +{ + char buf[256]; + + sprintf(buf, "change on device: %d channel:%d\n%s -> %s -> %s\n", + dev->id, chan->id, + isdn_state_table[i], strisdnevent(ev), isdn_state_table[f] + ); + +#ifdef DEBUG + printk("%s", buf); +#endif + + pcbit_logstat(dev, buf); +} + +static void set_running_timeout(unsigned long ptr) +{ + struct pcbit_dev *dev; + +#ifdef DEBUG + printk(KERN_DEBUG "set_running_timeout\n"); +#endif + dev = (struct pcbit_dev *) ptr; + + dev->l2_state = L2_DOWN; + wake_up_interruptible(&dev->set_running_wq); +} + +static int set_protocol_running(struct pcbit_dev *dev) +{ + isdn_ctrl ctl; + + init_timer(&dev->set_running_timer); + + dev->set_running_timer.function = &set_running_timeout; + dev->set_running_timer.data = (ulong) dev; + dev->set_running_timer.expires = jiffies + SET_RUN_TIMEOUT; + + /* kick it */ + + dev->l2_state = L2_STARTING; + + writeb((0x80U | ((dev->rcv_seq & 0x07) << 3) | (dev->send_seq & 0x07)), + dev->sh_mem + BANK4); + + add_timer(&dev->set_running_timer); + + wait_event(dev->set_running_wq, dev->l2_state == L2_RUNNING || + dev->l2_state == L2_DOWN); + + del_timer(&dev->set_running_timer); + + if (dev->l2_state == L2_RUNNING) + { + printk(KERN_DEBUG "pcbit: running\n"); + + dev->unack_seq = dev->send_seq; + + dev->writeptr = dev->sh_mem; + dev->readptr = dev->sh_mem + BANK2; + + /* tell the good news to the upper layer */ + ctl.driver = dev->id; + ctl.command = ISDN_STAT_RUN; + + dev->dev_if->statcallb(&ctl); + } + else + { + printk(KERN_DEBUG "pcbit: initialization failed\n"); + printk(KERN_DEBUG "pcbit: firmware not loaded\n"); + +#ifdef DEBUG + printk(KERN_DEBUG "Bank3 = %02x\n", + readb(dev->sh_mem + BANK3)); +#endif + writeb(0x40, dev->sh_mem + BANK4); + + /* warn the upper layer */ + ctl.driver = dev->id; + ctl.command = ISDN_STAT_STOP; + + dev->dev_if->statcallb(&ctl); + + return -EL2HLT; /* Level 2 halted */ + } + + return 0; +} + +static int pcbit_ioctl(isdn_ctrl *ctl) +{ + struct pcbit_dev *dev; + struct pcbit_ioctl *cmd; + + dev = finddev(ctl->driver); + + if (!dev) + { + printk(KERN_DEBUG "pcbit_ioctl: unknown device\n"); + return -ENODEV; + } + + cmd = (struct pcbit_ioctl *) ctl->parm.num; + + switch (ctl->arg) { + case PCBIT_IOCTL_GETSTAT: + cmd->info.l2_status = dev->l2_state; + break; + + case PCBIT_IOCTL_STRLOAD: + if (dev->l2_state == L2_RUNNING) + return -EBUSY; + + dev->unack_seq = dev->send_seq = dev->rcv_seq = 0; + + dev->writeptr = dev->sh_mem; + dev->readptr = dev->sh_mem + BANK2; + + dev->l2_state = L2_LOADING; + break; + + case PCBIT_IOCTL_LWMODE: + if (dev->l2_state != L2_LOADING) + return -EINVAL; + + dev->l2_state = L2_LWMODE; + break; + + case PCBIT_IOCTL_FWMODE: + if (dev->l2_state == L2_RUNNING) + return -EBUSY; + dev->loadptr = LOAD_ZONE_START; + dev->l2_state = L2_FWMODE; + + break; + case PCBIT_IOCTL_ENDLOAD: + if (dev->l2_state == L2_RUNNING) + return -EBUSY; + dev->l2_state = L2_DOWN; + break; + + case PCBIT_IOCTL_SETBYTE: + if (dev->l2_state == L2_RUNNING) + return -EBUSY; + + /* check addr */ + if (cmd->info.rdp_byte.addr > BANK4) + return -EFAULT; + + writeb(cmd->info.rdp_byte.value, dev->sh_mem + cmd->info.rdp_byte.addr); + break; + case PCBIT_IOCTL_GETBYTE: + if (dev->l2_state == L2_RUNNING) + return -EBUSY; + + /* check addr */ + + if (cmd->info.rdp_byte.addr > BANK4) + { + printk("getbyte: invalid addr %04x\n", cmd->info.rdp_byte.addr); + return -EFAULT; + } + + cmd->info.rdp_byte.value = readb(dev->sh_mem + cmd->info.rdp_byte.addr); + break; + case PCBIT_IOCTL_RUNNING: + if (dev->l2_state == L2_RUNNING) + return -EBUSY; + return set_protocol_running(dev); + break; + case PCBIT_IOCTL_WATCH188: + if (dev->l2_state != L2_LOADING) + return -EINVAL; + pcbit_l2_write(dev, MSG_WATCH188, 0x0001, NULL, 0); + break; + case PCBIT_IOCTL_PING188: + if (dev->l2_state != L2_LOADING) + return -EINVAL; + pcbit_l2_write(dev, MSG_PING188_REQ, 0x0001, NULL, 0); + break; + case PCBIT_IOCTL_APION: + if (dev->l2_state != L2_LOADING) + return -EINVAL; + pcbit_l2_write(dev, MSG_API_ON, 0x0001, NULL, 0); + break; + case PCBIT_IOCTL_STOP: + dev->l2_state = L2_DOWN; + writeb(0x40, dev->sh_mem + BANK4); + dev->rcv_seq = 0; + dev->send_seq = 0; + dev->unack_seq = 0; + break; + default: + printk("error: unknown ioctl\n"); + break; + }; + return 0; +} + +/* + * MSN list handling + * + * if null reject all calls + * if first entry has null MSN accept all calls + */ + +static void pcbit_clear_msn(struct pcbit_dev *dev) +{ + struct msn_entry *ptr, *back; + + for (ptr = dev->msn_list; ptr;) + { + back = ptr->next; + kfree(ptr); + ptr = back; + } + + dev->msn_list = NULL; +} + +static void pcbit_set_msn(struct pcbit_dev *dev, char *list) +{ + struct msn_entry *ptr; + struct msn_entry *back = NULL; + char *cp, *sp; + int len; + + if (strlen(list) == 0) { + ptr = kmalloc(sizeof(struct msn_entry), GFP_ATOMIC); + if (!ptr) { + printk(KERN_WARNING "kmalloc failed\n"); + return; + } + + ptr->msn = NULL; + + ptr->next = dev->msn_list; + dev->msn_list = ptr; + + return; + } + + if (dev->msn_list) + for (back = dev->msn_list; back->next; back = back->next); + + sp = list; + + do { + cp = strchr(sp, ','); + if (cp) + len = cp - sp; + else + len = strlen(sp); + + ptr = kmalloc(sizeof(struct msn_entry), GFP_ATOMIC); + + if (!ptr) { + printk(KERN_WARNING "kmalloc failed\n"); + return; + } + ptr->next = NULL; + + ptr->msn = kmalloc(len + 1, GFP_ATOMIC); + if (!ptr->msn) { + printk(KERN_WARNING "kmalloc failed\n"); + kfree(ptr); + return; + } + + memcpy(ptr->msn, sp, len); + ptr->msn[len] = 0; + +#ifdef DEBUG + printk(KERN_DEBUG "msn: %s\n", ptr->msn); +#endif + if (dev->msn_list == NULL) + dev->msn_list = ptr; + else + back->next = ptr; + back = ptr; + sp += len; + } while (cp); +} + +/* + * check if we do signal or reject an incoming call + */ +static int pcbit_check_msn(struct pcbit_dev *dev, char *msn) +{ + struct msn_entry *ptr; + + for (ptr = dev->msn_list; ptr; ptr = ptr->next) { + + if (ptr->msn == NULL) + return 1; + + if (strcmp(ptr->msn, msn) == 0) + return 1; + } + + return 0; +} |