/* $NetBSD: fwiso.c,v 1.3 2003/07/14 15:47:13 lukem Exp $ */ /*- * Copyright (c) 2001 and 2002 * HAYAKAWA Koichi. 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #include __KERNEL_RCSID(0, "$NetBSD: fwiso.c,v 1.3 2003/07/14 15:47:13 lukem Exp $"); #include "fwiso.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DEBUG #define DPRINTF(x) printf x #else #define DPRINTF(x) #endif #define UNIT(dev) minor(dev)&0xff #define IOCTL(dev) minor(dev)&0x0100 #define DVDEV(dev) minor(dev)&0x0200 #define MPEG2DEV(dev) minor(dev)&0x0300 /* * device number rule * * Lower 8-bit of minor number represents fwiso pseudo device. * Higher bits represents types of the device. * * 0x0000: raw fwiso device * 0x0100: for ioctl (can't read/write) * 0x0200: standard DV type * 0x0300: MPEG2 TS */ /* * The movement of data. * * Isochronous data acquired by device is copied in reservoir * buffer by fwisohandler. fwisohandler is a callback function, * called in the device drover of an IEEE 1394 host device. The * copied data in reservoir is deriverd to userland by fwisoread. * So, at least data copy will happen twice. */ struct fwiso_pktdata { u_int8_t *pkt_base; /* Base address: NEVER change */ size_t pkt_len; /* Length of the data in the buffer */ size_t pkt_buflen; /* Length of the buffer: NEVER change */ }; struct fwiso_pkts { struct fwiso_pktdata *fp_iov; /* packet data vector: NEVER change */ struct fwiso_pktdata *fp_iov_last; /* end packet data vector: NEVER change */ /* * Set members below volatile because they will be changed by * both intr handler and read routine. */ volatile struct fwiso_pktdata *fp_iov_start; /* pkt data vector */ struct fwiso_pktdata *fp_iov_end; /* pkt data vector */ volatile int fp_iovcnt; /* vector length */ }; #define FWISO_DEVNAMESIZ 12 struct fwiso_data { char fd_devname[FWISO_DEVNAMESIZ]; struct ieee1394_softc *fd_dev; int fd_status; /* status: share with interrupt hendler */ int fd_overflow; struct uio *fd_uio; /* for interrupt handler */ struct fwiso_pkts fd_rsv_pkts; /* temporary buffer for packets */ u_int8_t *fd_rsv_buf; int fd_rsv_size; /* * Should those data (fd_mode, fd_channel, fd_tag) be dedicatd * for read and write, or be shared with read and write? */ int fd_mode; int fd_channel; /* ISO channel (0 - 63) */ int fd_tag; /* IEEE1394_ISO_TAG0, _TAG1, _TAG2 */ int fd_threshold; u_int32_t fd_cycletimer; ieee1394_ir_tag_t fd_irtag; /* tag for isochronous reception */ ieee1394_it_tag_t fd_ittag; /* tag for isochronous transmission */ struct ieee1394_it_datalist *fd_itlist; int fd_it_serial; /* serial number of data block (not packet) */ int fd_it_frame; /* frame number */ int fd_it_dv_insert_empty; int fd_it_dv_insert_fraction; int fd_it_dv_insert_fractional; int fd_flags; #define FWISO_OPEN 0x01 #define FWISO_SETHANDLER 0x02 #define FWISO_IR_SLEEPING 0x04 #define FWISO_WRITE 0x08 #define FWISO_NONBLOCK 0x10 size_t fd_uioprev; /* previous uio value: XXX really needed? */ }; struct fwiso_data fwiso_data_str[NFWISO]; static int fwiso_min_space[FWISO_MODE_MAX] = {1, 480, 488, 1}; static int fwiso_head_offset[FWISO_MODE_MAX] = {0, 8, 0, 0}; #define FWISO_MAX_INTERFACE 10 /* I hope all the elements of fwiso_interface is initialised as NULL */ static struct ieee1394_softc *fwiso_interface[FWISO_MAX_INTERFACE] = {NULL}; static struct evcnt fwiso_drop_ev = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, NULL, "fwiso", "dropframe"); static struct evcnt fwiso_frame_ev = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, NULL, "fwiso", "frame"); void fwisoattach(int); static struct ieee1394_softc *fwiso_lookup_if(const char *); int fwisowrite_dv(struct fwiso_data *, struct uio *, int); static int fwiso_set_handler(struct fwiso_data *); dev_type_open(fwisoopen); dev_type_close(fwisoclose); dev_type_read(fwisoread); dev_type_write(fwisowrite); dev_type_ioctl(fwisoioctl); dev_type_poll(fwisopoll); const struct cdevsw fwiso_cdevsw = { fwisoopen, fwisoclose, fwisoread, fwisowrite, fwisoioctl, nostop, notty, fwisopoll, nommap, }; /* XXX: only for experimental */ extern int fwohci_set_isotx(struct ieee1394_softc *); struct fwohci_it_ctx; extern int fwohci_it_ctx_clear(ieee1394_it_tag_t); extern u_int16_t fwohci_it_cycletimer(ieee1394_it_tag_t); extern ieee1394_it_tag_t fwohci_it_set(struct ieee1394_softc *, int, int); extern int fwohci_it_ctx_writedata(ieee1394_it_tag_t, int, struct ieee1394_it_datalist *, int); /* ARGSUSED */ void fwisoattach(int n) { int i; memset(fwiso_data_str, 0, sizeof(fwiso_data_str)); for (i = 0; i < NFWISO; ++i) { snprintf(fwiso_data_str[i].fd_devname, 10, "fwiso%d", i); fwiso_data_str[i].fd_channel = -1; fwiso_data_str[i].fd_mode = -1; fwiso_data_str[i].fd_threshold = 0; fwiso_data_str[i].fd_tag = 0; fwiso_data_str[i].fd_uioprev = 0; } evcnt_attach_static(&fwiso_drop_ev); evcnt_attach_static(&fwiso_frame_ev); } /* * int fwisoread(dev_t dev, struct uio *uio, int ioflag) * * Read routine * * Algorithm: * * if interrupt handler is not set * register interrupt handler * prepare reserve buffer; * if some data exists in reserve buffer * copy data in uio * if uio is full * return * set uio in interrupt handler * sleep until interrupt handler wait me * set reserve buffer * return */ int fwisoread(dev_t dev, struct uio *uio, int ioflag) { struct fwiso_data *fd; int unit; int status = 0; int s; int minspace; int headoffs; volatile struct fwiso_pktdata *pkt; struct fwiso_pktdata *pkt_last; struct ieee1394_softc *isc; size_t resid; int i; unit = UNIT(dev); if (unit >= NFWISO) { return ENXIO; } if (IOCTL(dev)) { DPRINTF(("fwiso%d cannot read\n", unit)); return ENXIO; } fd = &fwiso_data_str[unit]; if ((fd->fd_flags & FWISO_OPEN) == 0) { return EBUSY; } isc = fd->fd_dev; if ((fd->fd_flags & FWISO_SETHANDLER) == 0) { int rv; if ((rv = fwiso_set_handler(fd)) != 0) { return rv; } } minspace = fwiso_min_space[fd->fd_mode]; headoffs = fwiso_head_offset[fd->fd_mode]; /* This is constant */ pkt_last = fd->fd_rsv_pkts.fp_iov_last; /* Only fwiso writes. Others read only */ pkt = fd->fd_rsv_pkts.fp_iov_start; s = splbio(); i = 0; resid = uio->uio_resid; DPRINTF(("%s: now reading\n", isc->sc1394_dev.dv_xname)); while ((status = (*isc->sc1394_ir_read)((struct device *)isc, fd->fd_irtag, uio, headoffs, 0)) == EAGAIN || (status == 0 && uio->uio_resid == resid)) { if (fd->fd_flags & FWISO_NONBLOCK) { break; } if (isc->sc1394_ir_wait == NULL) { if (++i > 20) { status = EIO; break; } delay(100); } else { status = (*isc->sc1394_ir_wait)((struct device *)isc, fd->fd_irtag, (void *)fd, fd->fd_devname); if (status != 0) { break; } } } splx(s); return status; } /* * int fwisowrite(dev_t dev, struct uio *uio, int ioflag) * * Write routine */ int fwisowrite(dev_t dev, struct uio *uio, int ioflag) { struct fwiso_data *fd; int unit; int rv = ENODEV; unit = UNIT(dev); if (unit >= NFWISO) { return ENXIO; } if (IOCTL(dev)) { DPRINTF(("fwiso%d cannot read\n", unit)); return ENXIO; } fd = &fwiso_data_str[unit]; if ((fd->fd_flags & FWISO_OPEN) == 0) { return EBUSY; } if (fd->fd_ittag == NULL) { /* XXX */ if (fd->fd_channel < 0) { fd->fd_channel = 63; } if (fd->fd_tag <= 0) { fd->fd_tag = IEEE1394_ISO_TAG1; } fd->fd_ittag = fwohci_it_set(fd->fd_dev, fd->fd_channel, fd->fd_tag); if (fd->fd_ittag == NULL) { return EBUSY; } fd->fd_flags |= FWISO_WRITE; printf("fwiso%d: it_set returns %p\n", unit, fd->fd_ittag); fd->fd_it_dv_insert_fractional = 16000; fd->fd_it_dv_insert_fraction = 1015; fd->fd_it_dv_insert_empty = 0; #define ITLISTSIZE sizeof(struct ieee1394_it_datalist)*100 if ((fd->fd_itlist = malloc(ITLISTSIZE, M_DEVBUF, M_WAITOK|M_ZERO)) == NULL) { /* */ printf("fwiso%d: cannot get memory for it_list\n", unit); return EBUSY; } /* XXX */ fd->fd_cycletimer = fwohci_it_cycletimer(fd->fd_ittag); printf("cycletimer %x %d %d\n", fd->fd_cycletimer, fd->fd_cycletimer >> 13, fd->fd_cycletimer&0x1fff); } #if 1 switch(fd->fd_mode) { case FWISO_MODE_DV: rv = fwisowrite_dv(fd, uio, 480); break; case FWISO_MODE_DV_RAW: break; case FWISO_MODE_RAW: break; } #endif return rv; } int fwisowrite_dv(struct fwiso_data *fd, struct uio *uio, int size) { int rv; struct ieee1394_it_datalist *itlist; struct ieee1394_it_datalist *loopend; struct iovec *iov = uio->uio_iov; int nodeid; const struct iovec *iov_end = iov + uio->uio_iovcnt; int iov_offs; /* offset in iov */ int ndata; int writesize = 0; int res = 0; int serialno; int i; int s; DPRINTF(("fwisowrite_dv(%p %p %d), resid %d iovcnt %d\n", fd, uio, size, uio->uio_resid, uio->uio_iovcnt)); iov_offs = 0; itlist = fd->fd_itlist; if (uio->uio_resid < size) { /* Only get rid of small data */ uio->uio_offset += uio->uio_resid; uio->uio_resid = 0; return res; } nodeid = 0; s = splbio(); while (uio->uio_resid >= size) { if (uio->uio_resid > 90*size) { loopend = fd->fd_itlist + 90; DPRINTF(("loop 90\n")); } else { loopend = fd->fd_itlist + uio->uio_resid/size; DPRINTF(("loop %d %p\n", uio->uio_resid/size, loopend)); } serialno = fd->fd_it_serial; /* make data list */ for (itlist = fd->fd_itlist; itlist < loopend; ++itlist) { int psize = size; /* first data is CIP header */ itlist->it_cmd[0] = IEEE1394_IT_CMD_IMMED | 8; itlist->it_u[0].id_data[0] = IEEE1394_CIP_SET(SID, nodeid) | IEEE1394_CIP_SET(DBS, size) | IEEE1394_CIP_SET(DBC, serialno); ++serialno; itlist->it_u[0].id_data[1] = IEEE1394_CIP_FMT_DV | IEEE1394_CIP_SET(FDF_SYT, 0xffff); for (i = 1; i < IEEE1394_IT_CMD_NUM; ++i) { if (psize == 0) { itlist->it_cmd[i] = IEEE1394_IT_CMD_NOP; continue; } itlist->it_u[i].id_addr = (u_int8_t *)iov->iov_base + iov_offs; if (iov->iov_len - iov_offs >= psize) { itlist->it_cmd[i] = IEEE1394_IT_CMD_PTR | psize; iov_offs += psize; psize = 0; } else { itlist->it_cmd[i] = IEEE1394_IT_CMD_PTR | (iov->iov_len - iov_offs); psize -= iov->iov_len - iov_offs; iov_offs = 0; if (++iov == iov_end) { printf("ERROR iov %d\n", iov - uio->uio_iov); res = EFAULT; goto error_1; } } } } ndata = itlist - fd->fd_itlist; DPRINTF(("calling fwohci_it_ctx_writedata(%p %d %p 0)\n", fd->fd_ittag, ndata, fd->fd_itlist)); rv = fwohci_it_ctx_writedata(fd->fd_ittag, ndata, fd->fd_itlist, 0); writesize = rv * size; /* XXX: decrement for empty packet */ uio->uio_resid -= writesize; uio->uio_offset += writesize; fd->fd_it_serial += rv; itlist += rv; if (rv == 0) { if (fd->fd_uioprev == uio->uio_resid) { #if 0 printf("umm, I cannot write any more (%d)\n", fd->fd_it_serial); res = EFAULT; goto error_1; #endif } } fd->fd_uioprev = uio->uio_resid; if (rv < ndata) { /* reach at the end of DMA buffer */ break; } } error_1: splx(s); return res; } int fwisoopen(dev_t dev, int flags, int fmt, struct proc *p) { struct fwiso_data *fd; int unit = UNIT(dev); if (unit >= NFWISO) { return ENXIO; } if (IOCTL(dev)) { return 0; } fd = &fwiso_data_str[unit]; if (fd->fd_flags &= FWISO_OPEN) { return EBUSY; } fd->fd_flags = FWISO_OPEN; if (flags & O_NONBLOCK) { fd->fd_flags |= FWISO_NONBLOCK; } fd->fd_rsv_size = 0; fd->fd_uio = NULL; fd->fd_mode = FWISO_MODE_RAW; if (DVDEV(dev)) { fd->fd_mode = FWISO_MODE_DV; fd->fd_channel = 63; fd->fd_tag = IEEE1394_ISO_TAG1; } if (fd->fd_dev == NULL) { int i; for (i = 0; i < FWISO_MAX_INTERFACE; ++i) { if (fwiso_interface[i] != NULL) { fd->fd_dev = fwiso_interface[i]; printf("%s: using %s\n", fd->fd_devname, fwiso_interface[i]->sc1394_dev.dv_xname); break; } } } fd->fd_overflow = 0; return 0; } int fwisoclose(dev_t dev, int flags, int fmt, struct proc *p) { struct fwiso_data *fd; int unit = UNIT(dev); if (unit >= NFWISO) { return ENXIO; } fd = &fwiso_data_str[unit]; fd->fd_flags &= ~FWISO_OPEN; /* remove interrupt handler */ if (fd->fd_flags & FWISO_SETHANDLER) { int s = splbio(); /* remove handler */ (*fd->fd_dev->sc1394_ir_close)((struct device *)fd->fd_dev, fd->fd_irtag); fd->fd_flags &= ~FWISO_SETHANDLER; splx(s); } /* When this is opened for write, cleanup it_tag */ if (fd->fd_flags & FWISO_WRITE) { fwohci_it_ctx_clear(fd->fd_ittag); fd->fd_ittag = NULL; } if (fd->fd_overflow > 0) { printf("%s: %d frame dropped\n", fd->fd_devname, fd->fd_overflow); } fd->fd_flags = 0; fd->fd_overflow = 0; /* keep mode and interface */ return 0; } int fwisoioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p) { int unit = UNIT(dev); struct fwiso_data *fd; int error = 0; if (unit >= NFWISO) { return ENXIO; } fd = &fwiso_data_str[unit]; if (!data) { return EINVAL; } switch(cmd) { case FWISOSETIF: { const struct fwiso_if *fi = (struct fwiso_if *)data; if ((fd->fd_dev = fwiso_lookup_if(fi->fi_name)) == NULL) { error = EINVAL; } break; } case FWISOGETIF: { struct fwiso_if *fi = (struct fwiso_if *)data; if (fd->fd_dev != NULL) { memcpy(fi->fi_name, fd->fd_dev->sc1394_dev.dv_xname, FWISO_IFNAMESIZ); } else { memcpy(fi->fi_name, "---", 3); } break; } case FWISOSETMODE: { const int mode = *(int *)data; if (mode >= 0 && mode < FWISO_MODE_MAX) { fd->fd_mode = mode; } else { error = EINVAL; } break; } case FWISOGETMODE: *((int *)data) = fd->fd_mode; break; case FWISOSETCHANNEL: { const int channel = *(int *)data; if (channel >= 0 && channel < 64) { fd->fd_channel = channel; } else if (channel == FWISO_CHANNEL_ANY) { fd->fd_channel = IEEE1394_ISO_CHANNEL_ANY; } else { error = EINVAL; } break; } case FWISOGETCHANNEL: *((int *)data) = fd->fd_channel; break; case FWISOSETTAG: { const int tag = *(int *)data; #define FWISO_TAG_MAX (FWISO_TAG0 | FWISO_TAG1 | FWISO_TAG2 | FWISO_TAG3) if (tag >= FWISO_TAG0 || tag <= FWISO_TAG_MAX) { /* valid tag */ fd->fd_tag = tag; } else { error = EINVAL; } } case FWISOGETTAG: *((int *)data) = fd->fd_tag; break; default: error = EINVAL; break; } return error; } int fwisopoll(dev_t dev, int events, struct proc *p) { int unit = UNIT(dev); struct fwiso_data *fd; int s; int revents; int (*ir_select)(struct device *, ieee1394_ir_tag_t, struct proc *); if (unit >= NFWISO) { return ENXIO; } fd = &fwiso_data_str[unit]; if ((ir_select = fd->fd_dev->sc1394_ir_select) == NULL) { return events; } s = splbio(); /* * right now, only select for read is supported. */ revents = events & (POLLOUT | POLLWRNORM); if (events & (POLLIN | POLLRDNORM)) { if ((fd->fd_flags & FWISO_SETHANDLER) == 0) { int errcode; if ((errcode = fwiso_set_handler(fd)) != 0) { splx(s); return errcode; } } if ((*ir_select)((struct device *)fd->fd_dev, fd->fd_irtag, p) > 0) { revents |= events & (POLLIN | POLLRDNORM); } #if 0 if (fd->fd_rsv_pkts.fp_iovcnt > 0) { revents |= events & (POLLIN | POLLRDNORM); } else { selrecord(p, &fd->fd_sel); } #endif } splx(s); return revents; } int fwiso_register_if(struct ieee1394_softc *interface) { int i; for (i = 0; i < FWISO_MAX_INTERFACE; ++i) { if (fwiso_interface[i] == NULL) { fwiso_interface[i] = interface; break; } } if (i == FWISO_MAX_INTERFACE) { printf("fwiso: too many interfaces %s\n", interface->sc1394_dev.dv_xname); return 1; } return 0; } static struct ieee1394_softc * fwiso_lookup_if(const char *ifname) { int i; for (i = 0; i < FWISO_MAX_INTERFACE; ++i) { if (!strncmp(fwiso_interface[i]->sc1394_dev.dv_xname, ifname, FWISO_IFNAMESIZ)) { return fwiso_interface[i]; } } return NULL; } /* * static int fwiso_set_handler(struct fwiso_data *fd) * * This function set interrupt handler for isochronous data read. */ static int fwiso_set_handler(struct fwiso_data *fd) { int bufsize; int s; struct ieee1394_softc *isc = fd->fd_dev; int flags = 0; if (isc == NULL || isc->sc1394_ir_open == NULL) { return ENXIO; } switch (fd->fd_mode) { case FWISO_MODE_DV: if (fd->fd_threshold == 0) { fd->fd_threshold = 30; } fd->fd_rsv_size = 1024; /* buffer for 256 ms DV data */ bufsize = 488; flags |= IEEE1394_IR_TRIGGER_CIP_SYNC; break; case FWISO_MODE_DV_RAW: fd->fd_rsv_size = 128; /* buffer for 16 ms DV data */ bufsize = 488; flags |= IEEE1394_IR_SHORTDELAY; break; case FWISO_MODE_RAW: fd->fd_rsv_size = 64; bufsize = 4000; flags |= IEEE1394_IR_NEEDHEADER | IEEE1394_IR_SHORTDELAY; break; case FWISO_MODE_MPEG2TS: fd->fd_rsv_size = 64; bufsize = 512; break; } s = splbio(); /* set interrupt handler */ fd->fd_irtag = (*isc->sc1394_ir_open)((struct device *)isc, fd->fd_channel, fd->fd_tag, fd->fd_rsv_size, bufsize, flags); if (fd->fd_irtag == NULL) { splx(s); return ENXIO; } fd->fd_flags |= FWISO_SETHANDLER; splx(s); return 0; }