617 lines
18 KiB
C
617 lines
18 KiB
C
/* $FreeBSD$ */
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/*
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* Copyright (c) 2002 M Warner Losh. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software may be derived from NetBSD i82365.c and other files with
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* the following copyright:
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*
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* Copyright (c) 1997 Marc Horowitz. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Marc Horowitz.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/queue.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <dev/pccard/pccardreg.h>
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#include <dev/pccard/pccardvar.h>
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#include <dev/exca/excareg.h>
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#include <dev/exca/excavar.h>
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#ifdef EXCA_DEBUG
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#define DEVPRINTF(dev, fmt, args...) device_printf((dev), (fmt), ## args)
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#define DPRINTF(fmt, args...) printf(fmt, ## args)
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#else
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#define DEVPRINTF(dev, fmt, args...)
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#define DPRINTF(fmt, args...)
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#endif
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/* memory */
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#define EXCA_MEMINFO(NUM) { \
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EXCA_SYSMEM_ADDR ## NUM ## _START_LSB, \
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EXCA_SYSMEM_ADDR ## NUM ## _START_MSB, \
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EXCA_SYSMEM_ADDR ## NUM ## _STOP_LSB, \
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EXCA_SYSMEM_ADDR ## NUM ## _STOP_MSB, \
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EXCA_SYSMEM_ADDR ## NUM ## _WIN, \
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EXCA_CARDMEM_ADDR ## NUM ## _LSB, \
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EXCA_CARDMEM_ADDR ## NUM ## _MSB, \
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EXCA_ADDRWIN_ENABLE_MEM ## NUM ##, \
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}
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static struct mem_map_index_st {
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int sysmem_start_lsb;
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int sysmem_start_msb;
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int sysmem_stop_lsb;
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int sysmem_stop_msb;
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int sysmem_win;
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int cardmem_lsb;
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int cardmem_msb;
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int memenable;
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} mem_map_index[] = {
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EXCA_MEMINFO(0),
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EXCA_MEMINFO(1),
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EXCA_MEMINFO(2),
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EXCA_MEMINFO(3),
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EXCA_MEMINFO(4)
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};
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#undef EXCA_MEMINFO
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/*
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* Helper function. This will map the requested memory slot. We setup the
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* map before we call this function. This is used to initially force the
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* mapping, as well as later restore the mapping after it has been destroyed
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* in some fashion (due to a power event typically).
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*/
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static void
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exca_do_mem_map(struct exca_softc *sc, int win)
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{
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struct mem_map_index_st *map;
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struct pccard_mem_handle *mem;
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map = &mem_map_index[win];
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mem = &sc->mem[win];
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exca_write(sc, map->sysmem_start_lsb,
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(mem->addr >> EXCA_SYSMEM_ADDRX_SHIFT) & 0xff);
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exca_write(sc, map->sysmem_start_msb,
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((mem->addr >> (EXCA_SYSMEM_ADDRX_SHIFT + 8)) &
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EXCA_SYSMEM_ADDRX_START_MSB_ADDR_MASK) | 0x80);
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exca_write(sc, map->sysmem_stop_lsb,
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((mem->addr + mem->realsize - 1) >>
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EXCA_SYSMEM_ADDRX_SHIFT) & 0xff);
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exca_write(sc, map->sysmem_stop_msb,
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(((mem->addr + mem->realsize - 1) >>
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(EXCA_SYSMEM_ADDRX_SHIFT + 8)) &
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EXCA_SYSMEM_ADDRX_STOP_MSB_ADDR_MASK) |
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EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT2);
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exca_write(sc, map->sysmem_win,
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(mem->addr >> EXCA_MEMREG_WIN_SHIFT) & 0xff);
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exca_write(sc, map->cardmem_lsb,
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(mem->offset >> EXCA_CARDMEM_ADDRX_SHIFT) & 0xff);
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exca_write(sc, map->cardmem_msb,
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((mem->offset >> (EXCA_CARDMEM_ADDRX_SHIFT + 8)) &
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EXCA_CARDMEM_ADDRX_MSB_ADDR_MASK) |
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((mem->kind == PCCARD_MEM_ATTR) ?
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EXCA_CARDMEM_ADDRX_MSB_REGACTIVE_ATTR : 0));
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exca_setb(sc, EXCA_ADDRWIN_ENABLE, EXCA_ADDRWIN_ENABLE_MEMCS16 |
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map->memenable);
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DELAY(100);
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#ifdef EXCA_DEBUG
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{
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int r1, r2, r3, r4, r5, r6, r7;
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r1 = exca_read(sc, map->sysmem_start_msb);
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r2 = exca_read(sc, map->sysmem_start_lsb);
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r3 = exca_read(sc, map->sysmem_stop_msb);
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r4 = exca_read(sc, map->sysmem_stop_lsb);
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r5 = exca_read(sc, map->cardmem_msb);
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r6 = exca_read(sc, map->cardmem_lsb);
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r7 = exca_read(sc, map->sysmem_win);
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printf("exca_do_mem_map window %d: %02x%02x %02x%02x "
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"%02x%02x %02x (%08x+%08x.%08x*%08lx)\n",
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win, r1, r2, r3, r4, r5, r6, r7,
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mem->addr, mem->size, mem->realsize,
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mem->offset);
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}
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#endif
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}
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/*
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* public interface to map a resource. kind is the type of memory to
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* map (either common or attribute). Memory created via this interface
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* starts out at card address 0. Since the only way to set this is
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* to set it on a struct resource after it has been mapped, we're safe
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* in maping this assumption. Note that resources can be remapped using
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* exca_do_mem_map so that's how the card address can be set later.
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*/
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int
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exca_mem_map(struct exca_softc *sc, int kind, struct resource *res)
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{
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int win;
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for (win = 0; win < EXCA_MEM_WINS; win++) {
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if ((sc->memalloc & (1 << win)) == 0) {
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sc->memalloc |= (1 << win);
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break;
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}
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}
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if (win >= EXCA_MEM_WINS)
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return (1);
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sc->mem[win].cardaddr = 0;
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sc->mem[win].memt = rman_get_bustag(res);
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sc->mem[win].memh = rman_get_bushandle(res);
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sc->mem[win].addr = rman_get_start(res);
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sc->mem[win].size = rman_get_end(res) - sc->mem[win].addr + 1;
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sc->mem[win].realsize = sc->mem[win].size + EXCA_MEM_PAGESIZE - 1;
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sc->mem[win].realsize = sc->mem[win].realsize -
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(sc->mem[win].realsize % EXCA_MEM_PAGESIZE);
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sc->mem[win].offset = (long)(sc->mem[win].addr);
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sc->mem[win].kind = kind;
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DPRINTF("exca_mem_map window %d bus %x+%x+%lx card addr %x\n",
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win, sc->mem[win].addr, sc->mem[win].size,
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sc->mem[win].offset, sc->mem[win].cardaddr);
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exca_do_mem_map(sc, win);
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return (0);
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}
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/*
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* Private helper function. This turns off a given memory map that is in
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* use. We do this by just clearing the enable bit in the pcic. If we needed
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* to make memory unmapping/mapping pairs faster, we would have to store
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* more state information about the pcic and then use that to intelligently
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* to the map/unmap. However, since we don't do that sort of thing often
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* (generally just at configure time), it isn't a case worth optimizing.
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*/
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static void
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exca_mem_unmap(struct exca_softc *sc, int window)
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{
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if (window < 0 || window >= EXCA_MEM_WINS)
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panic("exca_mem_unmap: window out of range");
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exca_clrb(sc, EXCA_ADDRWIN_ENABLE, mem_map_index[window].memenable);
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sc->memalloc &= ~(1 << window);
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}
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/*
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* Find the map that we're using to hold the resoruce. This works well
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* so long as the client drivers don't do silly things like map the same
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* area mutliple times, or map both common and attribute memory at the
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* same time. This latter restriction is a bug. We likely should just
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* store a pointer to the res in the mem[x] data structure.
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*/
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static int
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exca_mem_findmap(struct exca_softc *sc, struct resource *res)
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{
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int win;
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for (win = 0; win < EXCA_MEM_WINS; win++) {
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if (sc->mem[win].memt == rman_get_bustag(res) &&
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sc->mem[win].addr == rman_get_start(res) &&
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sc->mem[win].size == rman_get_size(res))
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return (win);
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}
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return (-1);
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}
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/*
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* Set the memory flag. This means that we are setting if the memory
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* is coming from attribute memory or from common memory on the card.
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* CIS entries are generally in attribute memory (although they can
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* reside in common memory). Generally, this is the only use for attribute
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* memory. However, some cards require their drivers to dance in both
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* common and/or attribute memory and this interface (and setting the
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* offset interface) exist for such cards.
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*/
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int
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exca_mem_set_flags(struct exca_softc *sc, struct resource *res, uint32_t flags)
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{
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int win;
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win = exca_mem_findmap(sc, res);
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if (win < 0) {
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device_printf(sc->dev,
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"set_res_flags: specified resource not active\n");
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return (ENOENT);
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}
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sc->mem[win].kind = flags;
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exca_do_mem_map(sc, win);
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return (0);
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}
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/*
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* Given a resource, go ahead and unmap it if we can find it in the
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* resrouce list that's used.
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*/
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int
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exca_mem_unmap_res(struct exca_softc *sc, struct resource *res)
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{
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int win;
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win = exca_mem_findmap(sc, res);
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if (win < 0)
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return (ENOENT);
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exca_mem_unmap(sc, win);
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return (0);
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}
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/*
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* Set the offset of the memory. We use this for reading the CIS and
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* frobbing the pccard's pccard registers (POR, etc). Some drivers
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* need to access this functionality as well, since they have receive
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* buffers defined in the attribute memory. Thankfully, these cards
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* are few and fare between. Some cards also have common memory that
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* is large and only map a small portion of it at a time (but these cards
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* are rare, the more common case being to have just a small amount
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* of common memory that the driver needs to bcopy data from in order to
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* get at it.
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*/
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int
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exca_mem_set_offset(struct exca_softc *sc, struct resource *res,
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uint32_t cardaddr, uint32_t *deltap)
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{
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int win;
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uint32_t delta;
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win = exca_mem_findmap(sc, res);
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if (win < 0) {
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device_printf(sc->dev,
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"set_memory_offset: specified resource not active\n");
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return (ENOENT);
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}
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sc->mem[win].cardaddr = cardaddr;
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delta = cardaddr % EXCA_MEM_PAGESIZE;
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if (deltap)
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*deltap = delta;
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cardaddr -= delta;
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sc->mem[win].realsize = sc->mem[win].size + delta +
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EXCA_MEM_PAGESIZE - 1;
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sc->mem[win].realsize = sc->mem[win].realsize -
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(sc->mem[win].realsize % EXCA_MEM_PAGESIZE);
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sc->mem[win].offset = cardaddr - sc->mem[win].addr;
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exca_do_mem_map(sc, win);
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return (0);
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}
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/* I/O */
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#define EXCA_IOINFO(NUM) { \
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EXCA_IOADDR ## NUM ## _START_LSB, \
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EXCA_IOADDR ## NUM ## _START_MSB, \
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EXCA_IOADDR ## NUM ## _STOP_LSB, \
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EXCA_IOADDR ## NUM ## _STOP_MSB, \
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EXCA_ADDRWIN_ENABLE_IO ## NUM ##, \
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EXCA_IOCTL_IO ## NUM ## _WAITSTATE \
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| EXCA_IOCTL_IO ## NUM ## _ZEROWAIT \
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| EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_MASK \
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| EXCA_IOCTL_IO ## NUM ## _DATASIZE_MASK, \
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{ \
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EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_CARD, \
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EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \
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| EXCA_IOCTL_IO ## NUM ## _DATASIZE_8BIT, \
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EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \
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| EXCA_IOCTL_IO ## NUM ## _DATASIZE_16BIT, \
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} \
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}
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static struct io_map_index_st {
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int start_lsb;
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int start_msb;
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int stop_lsb;
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int stop_msb;
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int ioenable;
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int ioctlmask;
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int ioctlbits[3]; /* indexed by PCCARD_WIDTH_* */
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} io_map_index[] = {
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EXCA_IOINFO(0),
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EXCA_IOINFO(1),
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};
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#undef EXCA_IOINFO
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static void
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exca_do_io_map(struct exca_softc *sc, int win)
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{
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struct io_map_index_st *map;
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struct pccard_io_handle *io;
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map = &io_map_index[win];
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io = &sc->io[win];
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exca_write(sc, map->start_lsb, io->addr & 0xff);
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exca_write(sc, map->start_msb, (io->addr >> 8) & 0xff);
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exca_write(sc, map->stop_lsb, (io->addr + io->size - 1) & 0xff);
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exca_write(sc, map->stop_msb, ((io->addr + io->size - 1) >> 8) & 0xff);
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exca_clrb(sc, EXCA_IOCTL, map->ioctlmask);
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exca_setb(sc, EXCA_IOCTL, map->ioctlbits[io->width]);
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exca_setb(sc, EXCA_ADDRWIN_ENABLE, map->ioenable);
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#ifdef EXCA_DEBUG
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{
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int r1, r2, r3, r4;
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r1 = exca_read(sc, map->start_msb);
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r2 = exca_read(sc, map->start_lsb);
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r3 = exca_read(sc, map->stop_msb);
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r4 = exca_read(sc, map->stop_lsb);
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DPRINTF("exca_do_io_map window %d: %02x%02x %02x%02x "
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"(%08x+%08x)\n", win, r1, r2, r3, r4,
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io->addr, io->size);
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}
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#endif
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}
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int
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exca_io_map(struct exca_softc *sc, int width, struct resource *r)
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{
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int win;
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#ifdef EXCA_DEBUG
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static char *width_names[] = { "auto", "io8", "io16"};
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#endif
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for (win=0; win < EXCA_IO_WINS; win++) {
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if ((sc->ioalloc & (1 << win)) == 0) {
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sc->ioalloc |= (1 << win);
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break;
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}
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}
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if (win >= EXCA_IO_WINS)
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return (1);
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sc->io[win].iot = rman_get_bustag(r);
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sc->io[win].ioh = rman_get_bushandle(r);
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sc->io[win].addr = rman_get_start(r);
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sc->io[win].size = rman_get_end(r) - sc->io[win].addr + 1;
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sc->io[win].flags = 0;
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sc->io[win].width = width;
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DPRINTF("exca_io_map window %d %s port %x+%x\n",
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win, width_names[width], sc->io[win].addr,
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sc->io[win].size);
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exca_do_io_map(sc, win);
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return (0);
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}
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static void
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exca_io_unmap(struct exca_softc *sc, int window)
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{
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if (window >= EXCA_IO_WINS)
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panic("exca_io_unmap: window out of range");
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exca_clrb(sc, EXCA_ADDRWIN_ENABLE, io_map_index[window].ioenable);
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sc->ioalloc &= ~(1 << window);
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sc->io[window].iot = 0;
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sc->io[window].ioh = 0;
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sc->io[window].addr = 0;
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sc->io[window].size = 0;
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sc->io[window].flags = 0;
|
||
sc->io[window].width = 0;
|
||
}
|
||
|
||
static int
|
||
exca_io_findmap(struct exca_softc *sc, struct resource *res)
|
||
{
|
||
int win;
|
||
|
||
for (win = 0; win < EXCA_IO_WINS; win++) {
|
||
if (sc->io[win].iot == rman_get_bustag(res) &&
|
||
sc->io[win].addr == rman_get_start(res) &&
|
||
sc->io[win].size == rman_get_size(res))
|
||
return (win);
|
||
}
|
||
return (-1);
|
||
}
|
||
|
||
|
||
int
|
||
exca_io_unmap_res(struct exca_softc *sc, struct resource *res)
|
||
{
|
||
int win;
|
||
|
||
win = exca_io_findmap(sc, res);
|
||
if (win < 0)
|
||
return (ENOENT);
|
||
exca_io_unmap(sc, win);
|
||
return (0);
|
||
}
|
||
|
||
/* Misc */
|
||
|
||
/*
|
||
* If interrupts are enabled, then we should be able to just wait for
|
||
* an interrupt routine to wake us up. Busy waiting shouldn't be
|
||
* necessary. Sadly, not all legacy ISA cards support an interrupt
|
||
* for the busy state transitions, at least according to their datasheets,
|
||
* so we busy wait a while here..
|
||
*/
|
||
static void
|
||
exca_wait_ready(struct exca_softc *sc)
|
||
{
|
||
int i;
|
||
DEVPRINTF(sc->dev, "exca_wait_ready: status 0x%02x\n",
|
||
exca_read(sc, EXCA_IF_STATUS));
|
||
for (i = 0; i < 10000; i++) {
|
||
if (exca_read(sc, EXCA_IF_STATUS) & EXCA_IF_STATUS_READY)
|
||
return;
|
||
DELAY(500);
|
||
}
|
||
device_printf(sc->dev, "ready never happened, status = %02x\n",
|
||
exca_read(sc, EXCA_IF_STATUS));
|
||
}
|
||
|
||
/*
|
||
* Reset the card. Ideally, we'd do a lot of this via interrupts.
|
||
* However, many PC Cards will deassert the ready signal. This means
|
||
* that they are asserting an interrupt. This makes it hard to
|
||
* do anything but a busy wait here. One could argue that these
|
||
* such cards are broken, or that the bridge that allows this sort
|
||
* of interrupt through isn't quite what you'd want (and may be a standards
|
||
* violation). However, such arguing would leave a huge class of pc cards
|
||
* and bridges out of reach for
|
||
*/
|
||
void
|
||
exca_reset(struct exca_softc *sc, device_t child)
|
||
{
|
||
int cardtype;
|
||
int win;
|
||
|
||
/* enable socket i/o */
|
||
exca_setb(sc, EXCA_PWRCTL, EXCA_PWRCTL_OE);
|
||
|
||
exca_write(sc, EXCA_INTR, EXCA_INTR_ENABLE);
|
||
/* hold reset for 30ms */
|
||
DELAY(30*1000);
|
||
/* clear the reset flag */
|
||
exca_setb(sc, EXCA_INTR, EXCA_INTR_RESET);
|
||
/* wait 20ms as per pc card standard (r2.01) section 4.3.6 */
|
||
DELAY(20*1000);
|
||
|
||
exca_wait_ready(sc);
|
||
|
||
/* disable all address windows */
|
||
exca_write(sc, EXCA_ADDRWIN_ENABLE, 0);
|
||
|
||
CARD_GET_TYPE(child, &cardtype);
|
||
exca_setb(sc, EXCA_INTR, (cardtype == PCCARD_IFTYPE_IO) ?
|
||
EXCA_INTR_CARDTYPE_IO : EXCA_INTR_CARDTYPE_MEM);
|
||
DEVPRINTF(sc->dev, "card type is %s\n",
|
||
(cardtype == PCCARD_IFTYPE_IO) ? "io" : "mem");
|
||
|
||
/* reinstall all the memory and io mappings */
|
||
for (win = 0; win < EXCA_MEM_WINS; ++win)
|
||
if (sc->memalloc & (1 << win))
|
||
exca_do_mem_map(sc, win);
|
||
for (win = 0; win < EXCA_IO_WINS; ++win)
|
||
if (sc->ioalloc & (1 << win))
|
||
exca_do_io_map(sc, win);
|
||
}
|
||
|
||
/*
|
||
* Initialize the exca_softc data structure for the first time.
|
||
*/
|
||
void
|
||
exca_init(struct exca_softc *sc, device_t dev, exca_write_t *wrfn,
|
||
exca_read_t *rdfn, bus_space_tag_t bst, bus_space_handle_t bsh,
|
||
uint32_t offset)
|
||
{
|
||
sc->dev = dev;
|
||
sc->write_exca = wrfn;
|
||
sc->read_exca = rdfn;
|
||
sc->memalloc = 0;
|
||
sc->ioalloc = 0;
|
||
sc->bst = bst;
|
||
sc->bsh = bsh;
|
||
sc->offset = offset;
|
||
sc->flags = 0;
|
||
}
|
||
|
||
/*
|
||
* Probe the expected slots. We maybe should set the ID for each of these
|
||
* slots too while we're at it. But maybe that belongs to a separate
|
||
* function.
|
||
*
|
||
* Callers must charantee that there are at least EXCA_NSLOTS (4) in
|
||
* the array that they pass the address of the first element in the
|
||
* "exca" parameter.
|
||
*/
|
||
int
|
||
exca_probe_slots(device_t dev, struct exca_softc *exca, exca_write_t writefnp,
|
||
exca_read_t readfnp)
|
||
{
|
||
int rid;
|
||
struct resource *res;
|
||
int err;
|
||
bus_space_tag_t iot;
|
||
bus_space_handle_t ioh;
|
||
int i;
|
||
|
||
err = ENXIO;
|
||
rid = 0;
|
||
res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, EXCA_IOSIZE,
|
||
RF_ACTIVE);
|
||
if (res == NULL)
|
||
return (ENXIO);
|
||
iot = rman_get_bustag(res);
|
||
ioh = rman_get_bushandle(res);
|
||
for (i = 0; i < EXCA_NSLOTS; i++) {
|
||
exca_init(&exca[i], dev, writefnp, readfnp, iot, ioh,
|
||
i * EXCA_SOCKET_SIZE);
|
||
if (exca_is_pcic(&exca[i])) {
|
||
err = 0;
|
||
exca[i].flags |= EXCA_SOCKET_PRESENT;
|
||
}
|
||
}
|
||
bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
|
||
return (err);
|
||
}
|
||
|
||
int
|
||
exca_is_pcic(struct exca_softc *sc)
|
||
{
|
||
/* XXX */
|
||
return (0);
|
||
}
|