353 lines
10 KiB
C
353 lines
10 KiB
C
/*
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* libraw1394 - library for raw access to the 1394 bus with the Linux subsystem.
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*
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* Copyright (C) 1999,2000,2001,2002 Andreas Bombe
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* 2002 Christian Toegel <christian.toegel@gmx.at>
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* 2002 Manfred Weihs <weihs@ict.tuwien.ac.at>
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*
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* This library is licensed under the GNU Lesser General Public License (LGPL),
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* version 2.1 or later. See the file COPYING.LIB in the distribution for
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* details.
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*
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*
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* Contributions:
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*
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* Christian Toegel <christian.toegel@gmx.at>
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* lock64 request
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* transmit physical packet
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* raw1394_echo_request, raw1394_wake_up (interrupt blocking wait)
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*
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* Manfred Weihs <weihs@ict.tuwien.ac.at>
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* raw1394_start_async_send, raw1394_async_send
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*/
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#include <config.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include "raw1394.h"
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#include "kernel-raw1394.h"
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#include "raw1394_private.h"
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#if HAVE_VALGRIND_VALGRIND_H
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# include <valgrind/memcheck.h>
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# ifndef VALGRIND_MAKE_MEM_DEFINED_IF_ADDRESSABLE
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# define VALGRIND_MAKE_MEM_DEFINED_IF_ADDRESSABLE(m, n) do {} while(0)
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# endif
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#else
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# define VALGRIND_MAKE_MEM_DEFINED_IF_ADDRESSABLE(m, n) do {} while(0)
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#endif
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int ieee1394_start_read(struct ieee1394_handle *handle, nodeid_t node,
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nodeaddr_t addr, size_t length, quadlet_t *buffer,
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unsigned long tag)
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{
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struct raw1394_request req;
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CLEAR_REQ(&req);
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req.type = RAW1394_REQ_ASYNC_READ;
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req.generation = handle->generation;
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req.tag = tag;
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req.address = ((__u64)node << 48) | addr;
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req.length = length;
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req.recvb = ptr2int(buffer);
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return (int)write(handle->fd, &req, sizeof(req));
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}
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int ieee1394_start_write(struct ieee1394_handle *handle, nodeid_t node,
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nodeaddr_t addr, size_t length, quadlet_t *data,
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unsigned long tag)
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{
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struct raw1394_request req;
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CLEAR_REQ(&req);
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req.type = RAW1394_REQ_ASYNC_WRITE;
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req.generation = handle->generation;
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req.tag = tag;
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req.address = ((__u64)node << 48) | addr;
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req.length = length;
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req.sendb = ptr2int(data);
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return (int)write(handle->fd, &req, sizeof(req));
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}
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int ieee1394_start_lock(struct ieee1394_handle *handle, nodeid_t node,
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nodeaddr_t addr, unsigned int extcode, quadlet_t data,
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quadlet_t arg, quadlet_t *result, unsigned long tag)
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{
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struct raw1394_request req;
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quadlet_t sendbuf[2];
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if ((extcode > 7) || (extcode == 0)) {
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errno = EINVAL;
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return -1;
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}
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CLEAR_REQ(&req);
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req.type = RAW1394_REQ_LOCK;
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req.generation = handle->generation;
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req.tag = tag;
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req.address = ((__u64)node << 48) | addr;
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req.sendb = ptr2int(sendbuf);
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req.recvb = ptr2int(result);
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req.misc = extcode;
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switch (extcode) {
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case 3: /* EXTCODE_FETCH_ADD */
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case 4: /* EXTCODE_LITTLE_ADD */
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sendbuf[0] = data;
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req.length = 4;
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break;
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default:
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sendbuf[0] = arg;
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sendbuf[1] = data;
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req.length = 8;
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break;
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}
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return (int)write(handle->fd, &req, sizeof(req));
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}
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int ieee1394_start_lock64(struct ieee1394_handle *handle, nodeid_t node,
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nodeaddr_t addr, unsigned int extcode, octlet_t data,
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octlet_t arg, octlet_t *result, unsigned long tag)
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{
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struct raw1394_request req;
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octlet_t sendbuf[2];
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if ((extcode > 7) || (extcode == 0)) {
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errno = EINVAL;
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return -1;
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}
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CLEAR_REQ(&req);
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req.type = RAW1394_REQ_LOCK64;
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req.generation = handle->generation;
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req.tag = tag;
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req.address = ((__u64)node << 48) | addr;
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req.sendb = ptr2int(sendbuf);
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req.recvb = ptr2int(result);
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req.misc = extcode;
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switch (extcode) {
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case 3: /* EXTCODE_FETCH_ADD */
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case 4: /* EXTCODE_LITTLE_ADD */
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sendbuf[0] = data;
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req.length = 8;
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break;
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default:
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sendbuf[0] = arg;
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sendbuf[1] = data;
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req.length = 16;
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break;
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}
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return (int)write(handle->fd, &req, sizeof(req));
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}
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int ieee1394_start_async_stream(struct ieee1394_handle *handle,
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unsigned int channel,
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unsigned int tag, unsigned int sy,
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unsigned int speed, size_t length, quadlet_t *data,
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unsigned long rawtag)
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{
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struct raw1394_request req;
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CLEAR_REQ(&req);
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req.type = RAW1394_REQ_ASYNC_STREAM;
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req.generation = handle->generation;
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req.tag = rawtag;
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req.address = ((__u64)channel << 48) | speed;
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req.misc = (tag << 16) | sy;
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req.length = length;
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req.sendb = ptr2int(data);
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return (int)write(handle->fd, &req, sizeof(req));
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}
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int ieee1394_start_async_send(struct ieee1394_handle *handle,
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size_t length, size_t header_length, unsigned int expect_response,
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quadlet_t *data, unsigned long rawtag)
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{
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struct raw1394_request req;
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CLEAR_REQ(&req);
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req.type = RAW1394_REQ_ASYNC_SEND;
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req.generation = handle->generation;
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req.tag = rawtag;
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req.length = length;
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req.misc = (expect_response << 16) | (header_length & 0xffff);
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req.sendb = ptr2int(data);
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return (int)write(handle->fd, &req, sizeof(req));
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}
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#define SYNCFUNC_VARS \
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struct sync_cb_data sd = { 0, 0 }; \
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struct raw1394_reqhandle rh = { (req_callback_t)_raw1394_sync_cb, \
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&sd }; \
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int err = 0
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#define SYNCFUNC_BODY_WO_RETURN \
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while (!sd.done) { \
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if (err < 0) return err; \
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err = raw1394_loop_iterate(handle); \
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} \
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handle->mode.ieee1394->err = sd.errcode; \
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errno = raw1394_errcode_to_errno(sd.errcode);
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#define SYNCFUNC_BODY \
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SYNCFUNC_BODY_WO_RETURN \
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return (errno ? -1 : 0)
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int ieee1394_read(struct raw1394_handle *handle, nodeid_t node, nodeaddr_t addr,
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size_t length, quadlet_t *buffer)
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{
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SYNCFUNC_VARS;
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err = ieee1394_start_read(handle->mode.ieee1394, node, addr, length, buffer,
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(unsigned long)&rh);
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SYNCFUNC_BODY_WO_RETURN;
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if(!errno) {
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VALGRIND_MAKE_MEM_DEFINED_IF_ADDRESSABLE(buffer, length);
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}
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return (errno ? -1 : 0);
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}
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int ieee1394_write(struct raw1394_handle *handle, nodeid_t node, nodeaddr_t addr,
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size_t length, quadlet_t *data)
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{
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SYNCFUNC_VARS;
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err = ieee1394_start_write(handle->mode.ieee1394, node, addr, length, data,
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(unsigned long)&rh);
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SYNCFUNC_BODY;
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}
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int ieee1394_lock(struct raw1394_handle *handle, nodeid_t node, nodeaddr_t addr,
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unsigned int extcode, quadlet_t data, quadlet_t arg,
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quadlet_t *result)
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{
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SYNCFUNC_VARS;
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err = ieee1394_start_lock(handle->mode.ieee1394, node, addr, extcode, data, arg, result,
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(unsigned long)&rh);
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SYNCFUNC_BODY_WO_RETURN;
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if(!errno) {
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VALGRIND_MAKE_MEM_DEFINED_IF_ADDRESSABLE(result, sizeof(quadlet_t));
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}
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return (errno ? -1 : 0);
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}
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int ieee1394_lock64(struct raw1394_handle *handle, nodeid_t node, nodeaddr_t addr,
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unsigned int extcode, octlet_t data, octlet_t arg,
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octlet_t *result)
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{
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SYNCFUNC_VARS;
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err = ieee1394_start_lock64(handle->mode.ieee1394, node, addr, extcode, data, arg, result,
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(unsigned long)&rh);
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SYNCFUNC_BODY;
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}
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int ieee1394_async_stream(struct raw1394_handle *handle, unsigned int channel,
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unsigned int tag, unsigned int sy, unsigned int speed,
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size_t length, quadlet_t *data)
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{
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SYNCFUNC_VARS;
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err = ieee1394_start_async_stream(handle->mode.ieee1394, channel, tag, sy, speed, length,
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data, (unsigned long)&rh);
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SYNCFUNC_BODY;
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}
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int ieee1394_async_send(struct raw1394_handle *handle ,
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size_t length, size_t header_length, unsigned int expect_response,
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quadlet_t *data)
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{
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SYNCFUNC_VARS;
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err = ieee1394_start_async_send(handle->mode.ieee1394, length, header_length, expect_response,
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data, (unsigned long)&rh);
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SYNCFUNC_BODY;
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}
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int ieee1394_start_phy_packet_write(struct ieee1394_handle *handle,
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quadlet_t data, unsigned long tag)
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{
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struct raw1394_request req;
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CLEAR_REQ(&req);
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req.type = RAW1394_REQ_PHYPACKET;
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req.generation = handle->generation;
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req.tag = tag;
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req.sendb = data;
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return (int)write(handle->fd, &req, sizeof(req));
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}
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int ieee1394_phy_packet_write (struct raw1394_handle *handle, quadlet_t data)
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{
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SYNCFUNC_VARS;
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err = ieee1394_start_phy_packet_write(handle->mode.ieee1394, data, (unsigned long)&rh);
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SYNCFUNC_BODY; /* return 0 on success */
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}
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int ieee1394_echo_request(struct ieee1394_handle *handle, quadlet_t data)
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{
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struct raw1394_request req;
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int retval=0;
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CLEAR_REQ(&req);
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req.type = RAW1394_REQ_ECHO;
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req.misc = data;
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retval = (int)write(handle->fd, &req, sizeof(req));
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if (retval == sizeof(req)) {
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return 0; /* succcess */
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}
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return -1;
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}
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int ieee1394_wake_up(ieee1394handle_t handle)
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{
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return ieee1394_echo_request(handle, 0);
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}
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#undef SYNCFUNC_VARS
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#undef SYNCFUNC_BODY
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