255 lines
6.4 KiB
C
255 lines
6.4 KiB
C
/*
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* Copyright (C) 2002
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* Hidetoshi Shimokawa. 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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*
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* This product includes software developed by Hidetoshi Shimokawa.
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*
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* 4. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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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/types.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/conf.h>
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#include <sys/uio.h>
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#include <sys/sysctl.h>
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#include <sys/bus.h>
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#include <sys/signal.h>
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#include <sys/mman.h>
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#include <sys/ioccom.h>
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#include <dev/firewire/firewire.h>
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#include <dev/firewire/firewirereg.h>
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#include <dev/firewire/fwmem.h>
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static int fwmem_node=0, fwmem_speed=2, fwmem_debug=0;
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SYSCTL_DECL(_hw_firewire);
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SYSCTL_NODE(_hw_firewire, OID_AUTO, fwmem, CTLFLAG_RD, 0,
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"Firewire Memory Access");
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SYSCTL_INT(_hw_firewire_fwmem, OID_AUTO, node, CTLFLAG_RW, &fwmem_node, 0,
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"Fwmem target node");
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SYSCTL_INT(_hw_firewire_fwmem, OID_AUTO, speed, CTLFLAG_RW, &fwmem_speed, 0,
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"Fwmem link speed");
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SYSCTL_INT(_debug, OID_AUTO, fwmem_debug, CTLFLAG_RW, &fwmem_debug, 0,
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"Fwmem driver debug flag");
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struct fw_xfer *
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fwmem_read_quad(
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struct firewire_comm *fc,
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int dst,
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u_int16_t dst_hi,
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u_int32_t dst_lo
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)
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{
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struct fw_xfer *xfer;
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struct fw_pkt *fp;
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int err = 0;
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xfer = fw_xfer_alloc();
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if (xfer == NULL) {
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err = ENOMEM;
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return NULL;
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}
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xfer->fc = fc;
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xfer->dst = FWLOCALBUS | dst;
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xfer->spd = fwmem_speed; /* XXX */
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xfer->send.len = 12;
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xfer->send.buf = malloc(xfer->send.len, M_DEVBUF, M_NOWAIT | M_ZERO);
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if (xfer->send.buf == NULL) {
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err = ENOMEM;
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goto error;
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}
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xfer->send.off = 0;
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xfer->act.hand = fw_asy_callback;
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xfer->retry_req = fw_asybusy;
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xfer->sc = NULL;
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fp = (struct fw_pkt *)xfer->send.buf;
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fp->mode.rreqq.tcode = FWTCODE_RREQQ;
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fp->mode.rreqq.dst = htons(xfer->dst);
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fp->mode.rreqq.dest_hi = htons(dst_hi);
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fp->mode.rreqq.dest_lo = htonl(dst_lo);
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if (fwmem_debug)
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printf("fwmem: %d %04x:%08x\n", dst, dst_hi, dst_lo);
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err = fw_asyreq(fc, -1, xfer);
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if (err)
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goto error;
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err = tsleep((caddr_t)xfer, FWPRI, "fwmem", hz);
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if (err == 0) {
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return xfer;
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}
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error:
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fw_xfer_free(xfer);
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return NULL;
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}
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struct fw_xfer *
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fwmem_read_block(
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struct firewire_comm *fc,
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int dst,
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u_int16_t dst_hi,
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u_int32_t dst_lo,
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int len
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)
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{
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struct fw_xfer *xfer;
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struct fw_pkt *fp;
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int err = 0;
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xfer = fw_xfer_alloc();
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if (xfer == NULL) {
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err = ENOMEM;
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return NULL;
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}
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xfer->fc = fc;
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xfer->dst = FWLOCALBUS | dst;
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xfer->spd = fwmem_speed; /* XXX */
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xfer->send.len = 16;
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xfer->send.buf = malloc(xfer->send.len, M_DEVBUF, M_NOWAIT | M_ZERO);
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if (xfer->send.buf == NULL) {
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err = ENOMEM;
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goto error;
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}
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xfer->send.off = 0;
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xfer->act.hand = fw_asy_callback;
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xfer->retry_req = fw_asybusy;
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xfer->sc = NULL;
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fp = (struct fw_pkt *)xfer->send.buf;
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fp->mode.rreqb.tcode = FWTCODE_RREQB;
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fp->mode.rreqb.dst = htons(xfer->dst);
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fp->mode.rreqb.dest_hi = htons(dst_hi);
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fp->mode.rreqb.dest_lo = htonl(dst_lo);
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fp->mode.rreqb.len = htons(len);
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if (fwmem_debug)
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printf("fwmem: %d %04x:%08x %d\n", dst, dst_hi, dst_lo, len);
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err = fw_asyreq(fc, -1, xfer);
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if (err)
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goto error;
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err = tsleep((caddr_t)xfer, FWPRI, "fwmem", hz);
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if (err == 0) {
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return xfer;
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}
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error:
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fw_xfer_free(xfer);
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return NULL;
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}
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int
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fwmem_open (dev_t dev, int flags, int fmt, fw_proc *td)
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{
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int err = 0;
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return err;
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}
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int
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fwmem_close (dev_t dev, int flags, int fmt, fw_proc *td)
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{
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int err = 0;
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return err;
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}
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#define MAXLEN 2048
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#define USE_QUAD 0
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int
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fwmem_read (dev_t dev, struct uio *uio, int ioflag)
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{
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struct firewire_softc *sc;
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struct firewire_comm *fc;
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struct fw_xfer *xfer;
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int err = 0, pad;
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int unit = DEV2UNIT(dev);
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u_int16_t dst_hi;
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u_int32_t dst_lo;
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off_t offset;
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int len;
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sc = devclass_get_softc(firewire_devclass, unit);
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fc = sc->fc;
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pad = uio->uio_offset % 4;
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if (fwmem_debug && pad != 0)
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printf("unaligned\n");
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while(uio->uio_resid > 0) {
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offset = uio->uio_offset;
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offset -= pad;
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dst_hi = (offset >> 32) & 0xffff;
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dst_lo = offset & 0xffffffff;
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#if USE_QUAD
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xfer = fwmem_read_quad(fc, fwmem_node, dst_hi, dst_lo);
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if (xfer == NULL || xfer->resp != 0 || xfer->recv.buf == NULL)
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return EINVAL; /* XXX */
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err = uiomove(xfer->recv.buf + xfer->recv.off + 4*3 + pad,
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4 - pad, uio);
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#else
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len = uio->uio_resid;
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if (len > MAXLEN)
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len = MAXLEN;
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xfer = fwmem_read_block(fc, fwmem_node, dst_hi, dst_lo, len);
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if (xfer == NULL || xfer->resp != 0 || xfer->recv.buf == NULL)
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return EINVAL; /* XXX */
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err = uiomove(xfer->recv.buf + xfer->recv.off + 4*4 + pad,
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len - pad, uio);
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#endif
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if (err)
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return err;
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fw_xfer_free(xfer);
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pad = 0;
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}
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return err;
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}
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int
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fwmem_write (dev_t dev, struct uio *uio, int ioflag)
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{
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return EINVAL;
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}
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int
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fwmem_ioctl (dev_t dev, u_long cmd, caddr_t data, int flag, fw_proc *td)
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{
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return EINVAL;
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}
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int
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fwmem_poll (dev_t dev, int events, fw_proc *td)
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{
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return EINVAL;
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}
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int
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fwmem_mmap (dev_t dev, vm_offset_t offset, int nproto)
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{
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return EINVAL;
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}
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