From d635711daa98be86d4c7fd01499c34f566b54ccb Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 10 Jun 2016 05:30:17 -0300 Subject: Linux-libre 4.6.2-gnu --- drivers/staging/i4l/act2000/module.c | 813 +++++++++++++++++++++++++++++++++++ 1 file changed, 813 insertions(+) create mode 100644 drivers/staging/i4l/act2000/module.c (limited to 'drivers/staging/i4l/act2000/module.c') diff --git a/drivers/staging/i4l/act2000/module.c b/drivers/staging/i4l/act2000/module.c new file mode 100644 index 000000000..68073d0da --- /dev/null +++ b/drivers/staging/i4l/act2000/module.c @@ -0,0 +1,813 @@ +/* $Id: module.c,v 1.14.6.4 2001/09/23 22:24:32 kai Exp $ + * + * ISDN lowlevel-module for the IBM ISDN-S0 Active 2000. + * + * Author Fritz Elfert + * Copyright by Fritz Elfert + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + * Thanks to Friedemann Baitinger and IBM Germany + * + */ + +#include "act2000.h" +#include "act2000_isa.h" +#include "capi.h" +#include +#include +#include + +static unsigned short act2000_isa_ports[] = +{ + 0x0200, 0x0240, 0x0280, 0x02c0, 0x0300, 0x0340, 0x0380, + 0xcfe0, 0xcfa0, 0xcf60, 0xcf20, 0xcee0, 0xcea0, 0xce60, +}; + +static act2000_card *cards = (act2000_card *) NULL; + +/* Parameters to be set by insmod */ +static int act_bus = 0; +static int act_port = -1; /* -1 = Autoprobe */ +static int act_irq = -1; +static char *act_id = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"; + +MODULE_DESCRIPTION("ISDN4Linux: Driver for IBM Active 2000 ISDN card"); +MODULE_AUTHOR("Fritz Elfert"); +MODULE_LICENSE("GPL"); +MODULE_PARM_DESC(act_bus, "BusType of first card, 1=ISA, 2=MCA, 3=PCMCIA, currently only ISA"); +MODULE_PARM_DESC(act_port, "Base port address of first card"); +MODULE_PARM_DESC(act_irq, "IRQ of first card"); +MODULE_PARM_DESC(act_id, "ID-String of first card"); +module_param(act_bus, int, 0); +module_param(act_port, int, 0); +module_param(act_irq, int, 0); +module_param(act_id, charp, 0); + +static int act2000_addcard(int, int, int, char *); + +static act2000_chan * +find_channel(act2000_card *card, int channel) +{ + if ((channel >= 0) && (channel < ACT2000_BCH)) + return &(card->bch[channel]); + printk(KERN_WARNING "act2000: Invalid channel %d\n", channel); + return NULL; +} + +/* + * Free MSN list + */ +static void +act2000_clear_msn(act2000_card *card) +{ + struct msn_entry *p = card->msn_list; + struct msn_entry *q; + unsigned long flags; + + spin_lock_irqsave(&card->lock, flags); + card->msn_list = NULL; + spin_unlock_irqrestore(&card->lock, flags); + while (p) { + q = p->next; + kfree(p); + p = q; + } +} + +/* + * Find an MSN entry in the list. + * If ia5 != 0, return IA5-encoded EAZ, else + * return a bitmask with corresponding bit set. + */ +static __u16 +act2000_find_msn(act2000_card *card, char *msn, int ia5) +{ + struct msn_entry *p = card->msn_list; + __u8 eaz = '0'; + + while (p) { + if (!strcmp(p->msn, msn)) { + eaz = p->eaz; + break; + } + p = p->next; + } + if (!ia5) + return (1 << (eaz - '0')); + else + return eaz; +} + +/* + * Find an EAZ entry in the list. + * return a string with corresponding msn. + */ +char * +act2000_find_eaz(act2000_card *card, char eaz) +{ + struct msn_entry *p = card->msn_list; + + while (p) { + if (p->eaz == eaz) + return (p->msn); + p = p->next; + } + return ("\0"); +} + +/* + * Add or delete an MSN to the MSN list + * + * First character of msneaz is EAZ, rest is MSN. + * If length of eazmsn is 1, delete that entry. + */ +static int +act2000_set_msn(act2000_card *card, char *eazmsn) +{ + struct msn_entry *p = card->msn_list; + struct msn_entry *q = NULL; + unsigned long flags; + int i; + + if (!strlen(eazmsn)) + return 0; + if (strlen(eazmsn) > 16) + return -EINVAL; + for (i = 0; i < strlen(eazmsn); i++) + if (!isdigit(eazmsn[i])) + return -EINVAL; + if (strlen(eazmsn) == 1) { + /* Delete a single MSN */ + while (p) { + if (p->eaz == eazmsn[0]) { + spin_lock_irqsave(&card->lock, flags); + if (q) + q->next = p->next; + else + card->msn_list = p->next; + spin_unlock_irqrestore(&card->lock, flags); + kfree(p); + printk(KERN_DEBUG + "Mapping for EAZ %c deleted\n", + eazmsn[0]); + return 0; + } + q = p; + p = p->next; + } + return 0; + } + /* Add a single MSN */ + while (p) { + /* Found in list, replace MSN */ + if (p->eaz == eazmsn[0]) { + spin_lock_irqsave(&card->lock, flags); + strcpy(p->msn, &eazmsn[1]); + spin_unlock_irqrestore(&card->lock, flags); + printk(KERN_DEBUG + "Mapping for EAZ %c changed to %s\n", + eazmsn[0], + &eazmsn[1]); + return 0; + } + p = p->next; + } + /* Not found in list, add new entry */ + p = kmalloc(sizeof(msn_entry), GFP_KERNEL); + if (!p) + return -ENOMEM; + p->eaz = eazmsn[0]; + strcpy(p->msn, &eazmsn[1]); + p->next = card->msn_list; + spin_lock_irqsave(&card->lock, flags); + card->msn_list = p; + spin_unlock_irqrestore(&card->lock, flags); + printk(KERN_DEBUG + "Mapping %c -> %s added\n", + eazmsn[0], + &eazmsn[1]); + return 0; +} + +static void +act2000_transmit(struct work_struct *work) +{ + struct act2000_card *card = + container_of(work, struct act2000_card, snd_tq); + + switch (card->bus) { + case ACT2000_BUS_ISA: + act2000_isa_send(card); + break; + case ACT2000_BUS_PCMCIA: + case ACT2000_BUS_MCA: + default: + printk(KERN_WARNING + "act2000_transmit: Illegal bustype %d\n", card->bus); + } +} + +static void +act2000_receive(struct work_struct *work) +{ + struct act2000_card *card = + container_of(work, struct act2000_card, poll_tq); + + switch (card->bus) { + case ACT2000_BUS_ISA: + act2000_isa_receive(card); + break; + case ACT2000_BUS_PCMCIA: + case ACT2000_BUS_MCA: + default: + printk(KERN_WARNING + "act2000_receive: Illegal bustype %d\n", card->bus); + } +} + +static void +act2000_poll(unsigned long data) +{ + act2000_card *card = (act2000_card *)data; + unsigned long flags; + + act2000_receive(&card->poll_tq); + spin_lock_irqsave(&card->lock, flags); + mod_timer(&card->ptimer, jiffies + 3); + spin_unlock_irqrestore(&card->lock, flags); +} + +static int +act2000_command(act2000_card *card, isdn_ctrl *c) +{ + ulong a; + act2000_chan *chan; + act2000_cdef cdef; + isdn_ctrl cmd; + char tmp[17]; + int ret; + unsigned long flags; + void __user *arg; + + switch (c->command) { + case ISDN_CMD_IOCTL: + memcpy(&a, c->parm.num, sizeof(ulong)); + arg = (void __user *)a; + switch (c->arg) { + case ACT2000_IOCTL_LOADBOOT: + switch (card->bus) { + case ACT2000_BUS_ISA: + ret = act2000_isa_download(card, + arg); + if (!ret) { + card->flags |= ACT2000_FLAGS_LOADED; + if (!(card->flags & ACT2000_FLAGS_IVALID)) { + card->ptimer.expires = jiffies + 3; + card->ptimer.function = act2000_poll; + card->ptimer.data = (unsigned long)card; + add_timer(&card->ptimer); + } + actcapi_manufacturer_req_errh(card); + } + break; + default: + printk(KERN_WARNING + "act2000: Illegal BUS type %d\n", + card->bus); + ret = -EIO; + } + return ret; + case ACT2000_IOCTL_SETPROTO: + card->ptype = a ? ISDN_PTYPE_EURO : ISDN_PTYPE_1TR6; + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return 0; + actcapi_manufacturer_req_net(card); + return 0; + case ACT2000_IOCTL_SETMSN: + if (copy_from_user(tmp, arg, + sizeof(tmp))) + return -EFAULT; + if ((ret = act2000_set_msn(card, tmp))) + return ret; + if (card->flags & ACT2000_FLAGS_RUNNING) + return (actcapi_manufacturer_req_msn(card)); + return 0; + case ACT2000_IOCTL_ADDCARD: + if (copy_from_user(&cdef, arg, + sizeof(cdef))) + return -EFAULT; + if (act2000_addcard(cdef.bus, cdef.port, cdef.irq, cdef.id)) + return -EIO; + return 0; + case ACT2000_IOCTL_TEST: + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + return 0; + default: + return -EINVAL; + } + break; + case ISDN_CMD_DIAL: + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + if (!(chan = find_channel(card, c->arg & 0x0f))) + break; + spin_lock_irqsave(&card->lock, flags); + if (chan->fsm_state != ACT2000_STATE_NULL) { + spin_unlock_irqrestore(&card->lock, flags); + printk(KERN_WARNING "Dial on channel with state %d\n", + chan->fsm_state); + return -EBUSY; + } + if (card->ptype == ISDN_PTYPE_EURO) + tmp[0] = act2000_find_msn(card, c->parm.setup.eazmsn, 1); + else + tmp[0] = c->parm.setup.eazmsn[0]; + chan->fsm_state = ACT2000_STATE_OCALL; + chan->callref = 0xffff; + spin_unlock_irqrestore(&card->lock, flags); + ret = actcapi_connect_req(card, chan, c->parm.setup.phone, + tmp[0], c->parm.setup.si1, + c->parm.setup.si2); + if (ret) { + cmd.driver = card->myid; + cmd.command = ISDN_STAT_DHUP; + cmd.arg &= 0x0f; + card->interface.statcallb(&cmd); + } + return ret; + case ISDN_CMD_ACCEPTD: + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + if (!(chan = find_channel(card, c->arg & 0x0f))) + break; + if (chan->fsm_state == ACT2000_STATE_ICALL) + actcapi_select_b2_protocol_req(card, chan); + return 0; + case ISDN_CMD_ACCEPTB: + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + return 0; + case ISDN_CMD_HANGUP: + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + if (!(chan = find_channel(card, c->arg & 0x0f))) + break; + switch (chan->fsm_state) { + case ACT2000_STATE_ICALL: + case ACT2000_STATE_BSETUP: + actcapi_connect_resp(card, chan, 0x15); + break; + case ACT2000_STATE_ACTIVE: + actcapi_disconnect_b3_req(card, chan); + break; + } + return 0; + case ISDN_CMD_SETEAZ: + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + if (!(chan = find_channel(card, c->arg & 0x0f))) + break; + if (strlen(c->parm.num)) { + if (card->ptype == ISDN_PTYPE_EURO) { + chan->eazmask = act2000_find_msn(card, c->parm.num, 0); + } + if (card->ptype == ISDN_PTYPE_1TR6) { + int i; + chan->eazmask = 0; + for (i = 0; i < strlen(c->parm.num); i++) + if (isdigit(c->parm.num[i])) + chan->eazmask |= (1 << (c->parm.num[i] - '0')); + } + } else + chan->eazmask = 0x3ff; + actcapi_listen_req(card); + return 0; + case ISDN_CMD_CLREAZ: + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + if (!(chan = find_channel(card, c->arg & 0x0f))) + break; + chan->eazmask = 0; + actcapi_listen_req(card); + return 0; + case ISDN_CMD_SETL2: + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + if (!(chan = find_channel(card, c->arg & 0x0f))) + break; + chan->l2prot = (c->arg >> 8); + return 0; + case ISDN_CMD_SETL3: + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + if ((c->arg >> 8) != ISDN_PROTO_L3_TRANS) { + printk(KERN_WARNING "L3 protocol unknown\n"); + return -1; + } + if (!(chan = find_channel(card, c->arg & 0x0f))) + break; + chan->l3prot = (c->arg >> 8); + return 0; + } + + return -EINVAL; +} + +static int +act2000_sendbuf(act2000_card *card, int channel, int ack, struct sk_buff *skb) +{ + struct sk_buff *xmit_skb; + int len; + act2000_chan *chan; + actcapi_msg *msg; + + if (!(chan = find_channel(card, channel))) + return -1; + if (chan->fsm_state != ACT2000_STATE_ACTIVE) + return -1; + len = skb->len; + if ((chan->queued + len) >= ACT2000_MAX_QUEUED) + return 0; + if (!len) + return 0; + if (skb_headroom(skb) < 19) { + printk(KERN_WARNING "act2000_sendbuf: Headroom only %d\n", + skb_headroom(skb)); + xmit_skb = alloc_skb(len + 19, GFP_ATOMIC); + if (!xmit_skb) { + printk(KERN_WARNING "act2000_sendbuf: Out of memory\n"); + return 0; + } + skb_reserve(xmit_skb, 19); + skb_copy_from_linear_data(skb, skb_put(xmit_skb, len), len); + } else { + xmit_skb = skb_clone(skb, GFP_ATOMIC); + if (!xmit_skb) { + printk(KERN_WARNING "act2000_sendbuf: Out of memory\n"); + return 0; + } + } + dev_kfree_skb(skb); + msg = (actcapi_msg *)skb_push(xmit_skb, 19); + msg->hdr.len = 19 + len; + msg->hdr.applicationID = 1; + msg->hdr.cmd.cmd = 0x86; + msg->hdr.cmd.subcmd = 0x00; + msg->hdr.msgnum = actcapi_nextsmsg(card); + msg->msg.data_b3_req.datalen = len; + msg->msg.data_b3_req.blocknr = (msg->hdr.msgnum & 0xff); + msg->msg.data_b3_req.fakencci = MAKE_NCCI(chan->plci, 0, chan->ncci); + msg->msg.data_b3_req.flags = ack; /* Will be set to 0 on actual sending */ + actcapi_debug_msg(xmit_skb, 1); + chan->queued += len; + skb_queue_tail(&card->sndq, xmit_skb); + act2000_schedule_tx(card); + return len; +} + + +/* Read the Status-replies from the Interface */ +static int +act2000_readstatus(u_char __user *buf, int len, act2000_card *card) +{ + int count; + u_char __user *p; + + for (p = buf, count = 0; count < len; p++, count++) { + if (card->status_buf_read == card->status_buf_write) + return count; + put_user(*card->status_buf_read++, p); + if (card->status_buf_read > card->status_buf_end) + card->status_buf_read = card->status_buf; + } + return count; +} + +/* + * Find card with given driverId + */ +static inline act2000_card * +act2000_findcard(int driverid) +{ + act2000_card *p = cards; + + while (p) { + if (p->myid == driverid) + return p; + p = p->next; + } + return (act2000_card *) 0; +} + +/* + * Wrapper functions for interface to linklevel + */ +static int +if_command(isdn_ctrl *c) +{ + act2000_card *card = act2000_findcard(c->driver); + + if (card) + return (act2000_command(card, c)); + printk(KERN_ERR + "act2000: if_command %d called with invalid driverId %d!\n", + c->command, c->driver); + return -ENODEV; +} + +static int +if_writecmd(const u_char __user *buf, int len, int id, int channel) +{ + act2000_card *card = act2000_findcard(id); + + if (card) { + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + return (len); + } + printk(KERN_ERR + "act2000: if_writecmd called with invalid driverId!\n"); + return -ENODEV; +} + +static int +if_readstatus(u_char __user *buf, int len, int id, int channel) +{ + act2000_card *card = act2000_findcard(id); + + if (card) { + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + return (act2000_readstatus(buf, len, card)); + } + printk(KERN_ERR + "act2000: if_readstatus called with invalid driverId!\n"); + return -ENODEV; +} + +static int +if_sendbuf(int id, int channel, int ack, struct sk_buff *skb) +{ + act2000_card *card = act2000_findcard(id); + + if (card) { + if (!(card->flags & ACT2000_FLAGS_RUNNING)) + return -ENODEV; + return (act2000_sendbuf(card, channel, ack, skb)); + } + printk(KERN_ERR + "act2000: if_sendbuf called with invalid driverId!\n"); + return -ENODEV; +} + + +/* + * Allocate a new card-struct, initialize it + * link it into cards-list. + */ +static void +act2000_alloccard(int bus, int port, int irq, char *id) +{ + int i; + act2000_card *card; + if (!(card = kzalloc(sizeof(act2000_card), GFP_KERNEL))) { + printk(KERN_WARNING + "act2000: (%s) Could not allocate card-struct.\n", id); + return; + } + spin_lock_init(&card->lock); + spin_lock_init(&card->mnlock); + skb_queue_head_init(&card->sndq); + skb_queue_head_init(&card->rcvq); + skb_queue_head_init(&card->ackq); + INIT_WORK(&card->snd_tq, act2000_transmit); + INIT_WORK(&card->rcv_tq, actcapi_dispatch); + INIT_WORK(&card->poll_tq, act2000_receive); + init_timer(&card->ptimer); + card->interface.owner = THIS_MODULE; + card->interface.channels = ACT2000_BCH; + card->interface.maxbufsize = 4000; + card->interface.command = if_command; + card->interface.writebuf_skb = if_sendbuf; + card->interface.writecmd = if_writecmd; + card->interface.readstat = if_readstatus; + card->interface.features = + ISDN_FEATURE_L2_X75I | + ISDN_FEATURE_L2_HDLC | + ISDN_FEATURE_L3_TRANS | + ISDN_FEATURE_P_UNKNOWN; + card->interface.hl_hdrlen = 20; + card->ptype = ISDN_PTYPE_EURO; + strlcpy(card->interface.id, id, sizeof(card->interface.id)); + for (i = 0; i < ACT2000_BCH; i++) { + card->bch[i].plci = 0x8000; + card->bch[i].ncci = 0x8000; + card->bch[i].l2prot = ISDN_PROTO_L2_X75I; + card->bch[i].l3prot = ISDN_PROTO_L3_TRANS; + } + card->myid = -1; + card->bus = bus; + card->port = port; + card->irq = irq; + card->next = cards; + cards = card; +} + +/* + * register card at linklevel + */ +static int +act2000_registercard(act2000_card *card) +{ + switch (card->bus) { + case ACT2000_BUS_ISA: + break; + case ACT2000_BUS_MCA: + case ACT2000_BUS_PCMCIA: + default: + printk(KERN_WARNING + "act2000: Illegal BUS type %d\n", + card->bus); + return -1; + } + if (!register_isdn(&card->interface)) { + printk(KERN_WARNING + "act2000: Unable to register %s\n", + card->interface.id); + return -1; + } + card->myid = card->interface.channels; + sprintf(card->regname, "act2000-isdn (%s)", card->interface.id); + return 0; +} + +static void +unregister_card(act2000_card *card) +{ + isdn_ctrl cmd; + + cmd.command = ISDN_STAT_UNLOAD; + cmd.driver = card->myid; + card->interface.statcallb(&cmd); + switch (card->bus) { + case ACT2000_BUS_ISA: + act2000_isa_release(card); + break; + case ACT2000_BUS_MCA: + case ACT2000_BUS_PCMCIA: + default: + printk(KERN_WARNING + "act2000: Invalid BUS type %d\n", + card->bus); + break; + } +} + +static int +act2000_addcard(int bus, int port, int irq, char *id) +{ + act2000_card *p; + act2000_card *q = NULL; + int initialized; + int added = 0; + int failed = 0; + int i; + + if (!bus) + bus = ACT2000_BUS_ISA; + if (port != -1) { + /* Port defined, do fixed setup */ + act2000_alloccard(bus, port, irq, id); + } else { + /* No port defined, perform autoprobing. + * This may result in more than one card detected. + */ + switch (bus) { + case ACT2000_BUS_ISA: + for (i = 0; i < ARRAY_SIZE(act2000_isa_ports); i++) + if (act2000_isa_detect(act2000_isa_ports[i])) { + printk(KERN_INFO "act2000: Detected " + "ISA card at port 0x%x\n", + act2000_isa_ports[i]); + act2000_alloccard(bus, + act2000_isa_ports[i], irq, id); + } + break; + case ACT2000_BUS_MCA: + case ACT2000_BUS_PCMCIA: + default: + printk(KERN_WARNING + "act2000: addcard: Invalid BUS type %d\n", bus); + } + } + if (!cards) + return 1; + p = cards; + while (p) { + initialized = 0; + if (!p->interface.statcallb) { + /* Not yet registered. + * Try to register and activate it. + */ + added++; + switch (p->bus) { + case ACT2000_BUS_ISA: + if (act2000_isa_detect(p->port)) { + if (act2000_registercard(p)) + break; + if (act2000_isa_config_port(p, p->port)) { + printk(KERN_WARNING + "act2000: Could not request port 0x%04x\n", + p->port); + unregister_card(p); + p->interface.statcallb = NULL; + break; + } + if (act2000_isa_config_irq(p, p->irq)) { + printk(KERN_INFO + "act2000: No IRQ available, fallback to polling\n"); + /* Fall back to polled operation */ + p->irq = 0; + } + printk(KERN_INFO + "act2000: ISA" + "-type card at port " + "0x%04x ", + p->port); + if (p->irq) + printk("irq %d\n", p->irq); + else + printk("polled\n"); + initialized = 1; + } + break; + case ACT2000_BUS_MCA: + case ACT2000_BUS_PCMCIA: + default: + printk(KERN_WARNING + "act2000: addcard: Invalid BUS type %d\n", + p->bus); + } + } else + /* Card already initialized */ + initialized = 1; + if (initialized) { + /* Init OK, next card ... */ + q = p; + p = p->next; + } else { + /* Init failed, remove card from list, free memory */ + printk(KERN_WARNING + "act2000: Initialization of %s failed\n", + p->interface.id); + if (q) { + q->next = p->next; + kfree(p); + p = q->next; + } else { + cards = p->next; + kfree(p); + p = cards; + } + failed++; + } + } + return (added - failed); +} + +#define DRIVERNAME "IBM Active 2000 ISDN driver" + +static int __init act2000_init(void) +{ + printk(KERN_INFO "%s\n", DRIVERNAME); + if (!cards) + act2000_addcard(act_bus, act_port, act_irq, act_id); + if (!cards) + printk(KERN_INFO "act2000: No cards defined yet\n"); + return 0; +} + +static void __exit act2000_exit(void) +{ + act2000_card *card = cards; + act2000_card *last; + while (card) { + unregister_card(card); + del_timer_sync(&card->ptimer); + card = card->next; + } + card = cards; + while (card) { + last = card; + card = card->next; + act2000_clear_msn(last); + kfree(last); + } + printk(KERN_INFO "%s unloaded\n", DRIVERNAME); +} + +module_init(act2000_init); +module_exit(act2000_exit); -- cgit v1.2.3-54-g00ecf