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freebsd/sys/i4b/layer1/i4b_l1dmux.c

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/*-
* Copyright (c) 2000, 2001 Hellmuth Michaelis. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*---------------------------------------------------------------------------
*
* i4b_l1dmux.c - isdn4bsd layer 1 driver multiplexer
* --------------------------------------------------
* last edit-date: [Wed Jan 10 16:43:24 2001]
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_trace.h>
#include <i4b/layer1/i4b_l1.h>
#include <i4b/include/i4b_l1l2.h>
#include <i4b/include/i4b_global.h>
/*
* this code is nothing but a big dynamic switch to multiplex and demultiplex
* layer 1 hardware isdn drivers to a common layer 2.
*
* when a card is successfully attached at system boot time, the driver for
* this card calls the routine i4b_l1_mph_status_ind() with status = STI_ATTACH.
*
* This command is used to setup the tables for converting a "driver unit" and
* "driver type" pair (encoded in the calls from the hardware driver to the
* routines in this source file) to a "unit number" used in layer 2 and the
* layers above (up to and including the isdnd daemon) and for converting
* layer 2 units back to calling the appropriate driver and driver unit
* number.
*
* Example: in my setup, a Winbond (iwic) card is probed first and gets
* driver unit number 0, driver type 1 in layer 1. This becomes unit
* number 0 in layer 2 and up. The second card probed is a Teles card
* (isic) and gets driver unit number 0, driver type 0 in layer 1. This
* becomes unit number 1 in layer 1 and up.
*
* To add support for a new driver, add a new driver number to i4b_l1.h:
* currently we have L1DRVR_ISIC and L1DRVR_IWIC, so you would add
* L1DRVR_FOO. More you would want to add a L0FOOUNIT to encode unit
* numbers in your driver. You then have to add a l1foounittab[] and
* add an entry to the getl1tab() routine for your driver. The only
* thing left now is to write your driver with the support functions
* for this multiplexer ;-)
*/
unsigned int i4b_l1_debug = L1_DEBUG_DEFAULT;
static int l1isicunittab[MAXL1UNITS];
static int l1iwicunittab[MAXL1UNITS];
static int l1ifpiunittab[MAXL1UNITS];
static int l1ifpi2unittab[MAXL1UNITS];
static int l1ihfcunittab[MAXL1UNITS];
static int l1ifpnpunittab[MAXL1UNITS];
static int l1itjcunittab[MAXL1UNITS];
static int numl1units = 0;
static int l1drvunittab[MAXL1UNITS];
static struct i4b_l1mux_func *l1mux_func[MAXL1DRVR];
static int i4b_l1_ph_data_req(int, struct mbuf *, int);
static int i4b_l1_ph_activate_req(int);
/* from i4btrc driver i4b_trace.c */
int get_trace_data_from_l1(int unit, int what, int len, char *buf);
/* from layer 2 */
int i4b_ph_data_ind(int unit, struct mbuf *m);
int i4b_ph_activate_ind(int unit);
int i4b_ph_deactivate_ind(int unit);
int i4b_mph_status_ind(int, int, int);
/* layer 1 lme */
int i4b_l1_mph_command_req(int, int, void *);
/*---------------------------------------------------------------------------*
* jump table: interface function pointers L1/L2 interface
*---------------------------------------------------------------------------*/
struct i4b_l1l2_func i4b_l1l2_func = {
/* Layer 1 --> Layer 2 */
(int (*)(int, struct mbuf *)) i4b_ph_data_ind,
(int (*)(int)) i4b_ph_activate_ind,
(int (*)(int)) i4b_ph_deactivate_ind,
/* Layer 2 --> Layer 1 */
(int (*)(int, struct mbuf *, int)) i4b_l1_ph_data_req,
(int (*)(int)) i4b_l1_ph_activate_req,
/* Layer 1 --> trace interface driver, ISDN trace data */
(int (*)(i4b_trace_hdr_t *, int, u_char *)) get_trace_data_from_l1,
/* Driver control and status information */
(int (*)(int, int, int)) i4b_mph_status_ind,
(int (*)(int, int, void *)) i4b_l1_mph_command_req,
};
/*---------------------------------------------------------------------------*
* return a pointer to a layer 0 drivers unit tab
*---------------------------------------------------------------------------*/
static __inline int *
getl1tab(int drv)
{
switch(drv)
{
case L1DRVR_ISIC:
return(l1isicunittab);
break;
case L1DRVR_IWIC:
return(l1iwicunittab);
break;
case L1DRVR_IFPI:
return(l1ifpiunittab);
break;
case L1DRVR_IFPI2:
return(l1ifpi2unittab);
break;
case L1DRVR_IHFC:
return(l1ihfcunittab);
break;
case L1DRVR_IFPNP:
return(l1ifpnpunittab);
break;
case L1DRVR_ITJC:
return(l1itjcunittab);
break;
default:
return(NULL);
break;
}
}
/*===========================================================================*
* B - Channel (data transfer)
*===========================================================================*/
/*---------------------------------------------------------------------------*
* return the address of ISDN drivers linktab
*---------------------------------------------------------------------------*/
isdn_link_t *
i4b_l1_ret_linktab(int unit, int channel)
{
int drv_unit, ch_unit;
drv_unit = L0DRVR(l1drvunittab[unit]);
ch_unit = L0UNIT(l1drvunittab[unit]);
NDBGL1(L1_PRIM, "unit %d -> drv %d / drvunit %d", unit, drv_unit, ch_unit);
if (drv_unit >= MAXL1DRVR || l1mux_func[drv_unit] == NULL
|| l1mux_func[drv_unit]->ret_linktab == NULL)
panic("i4b_l1_ret_linktab: unknown driver type %d\n", drv_unit);
return(l1mux_func[drv_unit]->ret_linktab(ch_unit, channel));
}
/*---------------------------------------------------------------------------*
* set the ISDN driver linktab
*---------------------------------------------------------------------------*/
void
i4b_l1_set_linktab(int unit, int channel, drvr_link_t *dlt)
{
int drv_unit, ch_unit;
drv_unit = L0DRVR(l1drvunittab[unit]);
ch_unit = L0UNIT(l1drvunittab[unit]);
NDBGL1(L1_PRIM, "unit %d -> drv %d / drvunit %d", unit, drv_unit, ch_unit);
if (drv_unit >= MAXL1DRVR || l1mux_func[drv_unit] == NULL
|| l1mux_func[drv_unit]->set_linktab == NULL)
panic("i4b_l1_set_linktab: unknown driver type %d\n", drv_unit);
l1mux_func[drv_unit]->set_linktab(ch_unit, channel, dlt);
}
/*===========================================================================*
* trace D- and B-Channel support
*===========================================================================*/
/*---------------------------------------------------------------------------*
* L0 -> L1 trace information to trace driver
*---------------------------------------------------------------------------*/
int
i4b_l1_trace_ind(i4b_trace_hdr_t *hdr, int len, u_char *data)
{
register int *tab;
if((tab = getl1tab(L0DRVR(hdr->unit))) == NULL)
panic("i4b_l1_trace_ind: unknown driver type %d\n", L0DRVR(hdr->unit));
NDBGL1(L1_PRIM, "(drv %d / drvunit %d) -> unit %d", L0DRVR(hdr->unit), L0UNIT(hdr->unit), tab[L0UNIT(hdr->unit)]);
hdr->unit = tab[L0UNIT(hdr->unit)];
return(MPH_Trace_Ind(hdr, len, data));
}
/*===========================================================================*
* D - Channel (signalling)
*===========================================================================*/
/*---------------------------------------------------------------------------*
* L0 -> L1 status indication from hardware
*---------------------------------------------------------------------------*/
int
i4b_l1_mph_status_ind(int drv_unit, int status, int parm, struct i4b_l1mux_func *l1mux_func_p)
{
register int *tab;
/*
* in case the status STI_ATTACH is sent from the hardware, the
* driver has just attached itself and we need to initialize
* the tables and assorted variables.
*/
if(status == STI_ATTACH)
{
if (l1mux_func_p == (struct i4b_l1mux_func *)0)
panic("i4b_l1_mph_status_ind: i4b_l1mux_func pointer is NULL\n");
if(numl1units < MAXL1UNITS)
{
if((tab = getl1tab(L0DRVR(drv_unit))) == NULL)
panic("i4b_l1_mph_status_ind: unknown driver type %d\n", L0DRVR(drv_unit));
tab[L0UNIT(drv_unit)] = numl1units;
l1drvunittab[numl1units] = drv_unit;
l1mux_func[L0DRVR(drv_unit)] = l1mux_func_p;
switch(L0DRVR(drv_unit))
{
case L1DRVR_ISIC:
printf("isic%d: passive stack unit %d\n", L0UNIT(drv_unit), numl1units);
break;
case L1DRVR_IWIC:
printf("iwic%d: passive stack unit %d\n", L0UNIT(drv_unit), numl1units);
break;
case L1DRVR_IFPI:
printf("ifpi%d: passive stack unit %d\n", L0UNIT(drv_unit), numl1units);
break;
case L1DRVR_IFPI2:
printf("ifpi2-%d: passive stack unit %d\n", L0UNIT(drv_unit), numl1units);
break;
case L1DRVR_IFPNP:
printf("ifpnp%d: passive stack unit %d\n", L0UNIT(drv_unit), numl1units);
break;
case L1DRVR_IHFC:
printf("ihfc%d: passive stack unit %d\n", L0UNIT(drv_unit), numl1units);
break;
case L1DRVR_ITJC:
printf("itjc%d: passive stack unit %d\n", L0UNIT(drv_unit), numl1units);
break;
}
NDBGL1(L1_PRIM, "ATTACH drv %d, drvunit %d -> unit %d", L0DRVR(drv_unit), L0UNIT(drv_unit), numl1units);
numl1units++;
}
}
if((tab = getl1tab(L0DRVR(drv_unit))) == NULL)
panic("i4b_l1_mph_status_ind: unknown driver type %d\n", L0DRVR(drv_unit));
NDBGL1(L1_PRIM, "(drv %d / drvunit %d) -> unit %d\n", L0DRVR(drv_unit), L0UNIT(drv_unit), tab[L0UNIT(drv_unit)]);
return(MPH_Status_Ind(tab[L0UNIT(drv_unit)], status, parm));
}
/*---------------------------------------------------------------------------*
* L0 -> L1 data from hardware
*---------------------------------------------------------------------------*/
int
i4b_l1_ph_data_ind(int drv_unit, struct mbuf *data)
{
register int *tab;
if((tab = getl1tab(L0DRVR(drv_unit))) == NULL)
panic("i4b_l1_ph_data_ind: unknown driver type %d\n", L0DRVR(drv_unit));
#if 0
NDBGL1(L1_PRIM, "(drv %d / drvunit %d) -> unit %d", L0DRVR(drv_unit), L0UNIT(drv_unit), tab[L0UNIT(drv_unit)]);
#endif
return(PH_Data_Ind(tab[L0UNIT(drv_unit)], data));
}
/*---------------------------------------------------------------------------*
* L0 -> L1 activate indication from hardware
*---------------------------------------------------------------------------*/
int
i4b_l1_ph_activate_ind(int drv_unit)
{
register int *tab;
if((tab = getl1tab(L0DRVR(drv_unit))) == NULL)
panic("i4b_l1_ph_activate_ind: unknown driver type %d\n", L0DRVR(drv_unit));
NDBGL1(L1_PRIM, "(drv %d / drvunit %d) -> unit %d", L0DRVR(drv_unit), L0UNIT(drv_unit), tab[L0UNIT(drv_unit)]);
return(PH_Act_Ind(tab[L0UNIT(drv_unit)]));
}
/*---------------------------------------------------------------------------*
* L0 -> L1 deactivate indication from hardware
*---------------------------------------------------------------------------*/
int
i4b_l1_ph_deactivate_ind(int drv_unit)
{
register int *tab;
if((tab = getl1tab(L0DRVR(drv_unit))) == NULL)
panic("i4b_l1_ph_deactivate_ind: unknown driver type %d\n", L0DRVR(drv_unit));
NDBGL1(L1_PRIM, "(drv %d / drvunit %d) -> unit %d", L0DRVR(drv_unit), L0UNIT(drv_unit), tab[L0UNIT(drv_unit)]);
return(PH_Deact_Ind(tab[L0UNIT(drv_unit)]));
}
/*---------------------------------------------------------------------------*
* L2 -> L1 command to hardware
*---------------------------------------------------------------------------*/
int
i4b_l1_mph_command_req(int unit, int command, void * parm)
{
register int drv_unit = L0DRVR(l1drvunittab[unit]);
register int ch_unit = L0UNIT(l1drvunittab[unit]);
NDBGL1(L1_PRIM, "unit %d -> drv %d / drvunit %d", unit, drv_unit, ch_unit);
if (drv_unit >= MAXL1DRVR || l1mux_func[drv_unit] == NULL
|| l1mux_func[drv_unit]->mph_command_req == NULL)
panic("i4b_l1_mph_command_req: unknown driver type %d\n", drv_unit);
return(l1mux_func[drv_unit]->mph_command_req(ch_unit, command, parm));
}
/*---------------------------------------------------------------------------*
* L2 -> L1 data to be transmitted to hardware
*---------------------------------------------------------------------------*/
static int
i4b_l1_ph_data_req(int unit, struct mbuf *data, int flag)
{
register int drv_unit = L0DRVR(l1drvunittab[unit]);
register int ch_unit = L0UNIT(l1drvunittab[unit]);
#if 0
NDBGL1(L1_PRIM, "unit %d -> drv %d / drvunit %d", unit, drv_unit, ch_unit);
#endif
if (drv_unit >= MAXL1DRVR || l1mux_func[drv_unit] == NULL
|| l1mux_func[drv_unit]->ph_data_req == NULL)
panic("i4b_l1_ph_data_req: unknown driver type %d\n", drv_unit);
return(l1mux_func[drv_unit]->ph_data_req(ch_unit, data, flag));
}
/*---------------------------------------------------------------------------*
* L2 -> L1 activate request to hardware
*---------------------------------------------------------------------------*/
static int
i4b_l1_ph_activate_req(int unit)
{
register int drv_unit = L0DRVR(l1drvunittab[unit]);
register int ch_unit = L0UNIT(l1drvunittab[unit]);
NDBGL1(L1_PRIM, "unit %d -> drv %d / drvunit %d", unit, drv_unit, ch_unit);
if (drv_unit >= MAXL1DRVR || l1mux_func[drv_unit] == NULL
|| l1mux_func[drv_unit]->ph_activate_req == NULL)
panic("i4b_l1_ph_activate_req: unknown driver type %d\n", drv_unit);
return(l1mux_func[drv_unit]->ph_activate_req(ch_unit));
}
/* EOF */
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