diff options
Diffstat (limited to 'src/sysmo_l1_hw.c')
| -rw-r--r-- | src/sysmo_l1_hw.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/src/sysmo_l1_hw.c b/src/sysmo_l1_hw.c new file mode 100644 index 00000000..87c2c55e --- /dev/null +++ b/src/sysmo_l1_hw.c @@ -0,0 +1,215 @@ +/* Interface handler for Sysmocom L1 (real hardware) */ + +/* (C) 2011 by Harald Welte <laforge@gnumonks.org> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +#include <assert.h> +#include <stdint.h> +#include <unistd.h> +#include <errno.h> +#include <fcntl.h> + +#include <sys/types.h> +#include <sys/stat.h> + +#include <osmocom/core/talloc.h> +#include <osmocom/core/utils.h> +#include <osmocom/core/select.h> +#include <osmocom/core/write_queue.h> +#include <osmocom/core/timer.h> +#include <osmocom/gsm/gsm_utils.h> + +#include <sysmocom/femtobts/superfemto.h> +#include <sysmocom/femtobts/gsml1prim.h> +#include <sysmocom/femtobts/gsml1const.h> +#include <sysmocom/femtobts/gsml1types.h> + +#include "gprs_debug.h" +#include "femtobts.h" +#include "sysmo_l1_if.h" + + +#ifdef HW_SYSMOBTS_V1 +#define DEV_SYS_DSP2ARM_NAME "/dev/msgq/femtobts_dsp2arm" +#define DEV_SYS_ARM2DSP_NAME "/dev/msgq/femtobts_arm2dsp" +#define DEV_L1_DSP2ARM_NAME "/dev/msgq/gsml1_dsp2arm" +#define DEV_L1_ARM2DSP_NAME "/dev/msgq/gsml1_arm2dsp" +#else +#define DEV_SYS_DSP2ARM_NAME "/dev/msgq/superfemto_dsp2arm" +#define DEV_SYS_ARM2DSP_NAME "/dev/msgq/superfemto_arm2dsp" +#define DEV_L1_DSP2ARM_NAME "/dev/msgq/gsml1_sig_dsp2arm" +#define DEV_L1_ARM2DSP_NAME "/dev/msgq/gsml1_sig_arm2dsp" + +#define DEV_TCH_DSP2ARM_NAME "/dev/msgq/gsml1_tch_dsp2arm" +#define DEV_TCH_ARM2DSP_NAME "/dev/msgq/gsml1_tch_arm2dsp" +#define DEV_PDTCH_DSP2ARM_NAME "/dev/msgq/gsml1_pdtch_dsp2arm" +#define DEV_PDTCH_ARM2DSP_NAME "/dev/msgq/gsml1_pdtch_arm2dsp" +#endif + +static const char *rd_devnames[] = { + [MQ_SYS_READ] = DEV_SYS_DSP2ARM_NAME, + [MQ_L1_READ] = DEV_L1_DSP2ARM_NAME, +#ifndef HW_SYSMOBTS_V1 + [MQ_TCH_READ] = DEV_TCH_DSP2ARM_NAME, + [MQ_PDTCH_READ] = DEV_PDTCH_DSP2ARM_NAME, +#endif +}; + +static const char *wr_devnames[] = { + [MQ_SYS_WRITE] = DEV_SYS_ARM2DSP_NAME, + [MQ_L1_WRITE] = DEV_L1_ARM2DSP_NAME, +#ifndef HW_SYSMOBTS_V1 + [MQ_TCH_WRITE] = DEV_TCH_ARM2DSP_NAME, + [MQ_PDTCH_WRITE]= DEV_PDTCH_ARM2DSP_NAME, +#endif +}; + +/* callback when there's something to read from the l1 msg_queue */ +static int l1if_fd_cb(struct osmo_fd *ofd, unsigned int what) +{ + //struct msgb *msg = l1p_msgb_alloc(); + struct msgb *msg = msgb_alloc_headroom(sizeof(SuperFemto_Prim_t) + 128, + 128, "1l_fd"); + struct femtol1_hdl *fl1h = ofd->data; + int rc; + + msg->l1h = msg->data; + rc = read(ofd->fd, msg->l1h, msgb_tailroom(msg)); + if (rc < 0) { + if (rc != -1) + LOGP(DL1IF, LOGL_ERROR, "error reading from L1 msg_queue: %s\n", + strerror(errno)); + msgb_free(msg); + return rc; + } + msgb_put(msg, rc); + + switch (ofd->priv_nr) { + case MQ_SYS_WRITE: + if (rc != sizeof(SuperFemto_Prim_t)) + LOGP(DL1IF, LOGL_NOTICE, "%u != " + "sizeof(SuperFemto_Prim_t)\n", rc); + return l1if_handle_sysprim(fl1h, msg); + case MQ_L1_WRITE: +#ifndef HW_SYSMOBTS_V1 + case MQ_TCH_WRITE: + case MQ_PDTCH_WRITE: +#endif + if (rc != sizeof(GsmL1_Prim_t)) + LOGP(DL1IF, LOGL_NOTICE, "%u != " + "sizeof(GsmL1_Prim_t)\n", rc); + return l1if_handle_l1prim(ofd->priv_nr, fl1h, msg); + default: + /* The compiler can't know that priv_nr is an enum. Assist. */ + LOGP(DL1IF, LOGL_FATAL, "writing on a wrong queue: %d\n", + ofd->priv_nr); + exit(0); + break; + } +}; + +/* callback when we can write to one of the l1 msg_queue devices */ +static int l1fd_write_cb(struct osmo_fd *ofd, struct msgb *msg) +{ + int rc; + + rc = write(ofd->fd, msg->l1h, msgb_l1len(msg)); + if (rc < 0) { + LOGP(DL1IF, LOGL_ERROR, "error writing to L1 msg_queue: %s\n", + strerror(errno)); + return rc; + } else if (rc < msg->len) { + LOGP(DL1IF, LOGL_ERROR, "short write to L1 msg_queue: " + "%u < %u\n", rc, msg->len); + return -EIO; + } + + return 0; +} + +int l1if_transport_open(int q, struct femtol1_hdl *hdl) +{ + int rc; + + /* Step 1: Open all msg_queue file descriptors */ + struct osmo_fd *read_ofd = &hdl->read_ofd[q]; + struct osmo_wqueue *wq = &hdl->write_q[q]; + struct osmo_fd *write_ofd = &hdl->write_q[q].bfd; + + rc = open(rd_devnames[q], O_RDONLY); + if (rc < 0) { + LOGP(DL1IF, LOGL_FATAL, "unable to open msg_queue: %s\n", + strerror(errno)); + return rc; + } + read_ofd->fd = rc; + read_ofd->priv_nr = q; + read_ofd->data = hdl; + read_ofd->cb = l1if_fd_cb; + read_ofd->when = BSC_FD_READ; + rc = osmo_fd_register(read_ofd); + if (rc < 0) { + close(read_ofd->fd); + read_ofd->fd = -1; + return rc; + } + + rc = open(wr_devnames[q], O_WRONLY); + if (rc < 0) { + LOGP(DL1IF, LOGL_FATAL, "unable to open msg_queue: %s\n", + strerror(errno)); + goto out_read; + } + osmo_wqueue_init(wq, 10); + wq->write_cb = l1fd_write_cb; + write_ofd->fd = rc; + write_ofd->priv_nr = q; + write_ofd->data = hdl; + write_ofd->when = BSC_FD_WRITE; + rc = osmo_fd_register(write_ofd); + if (rc < 0) { + close(write_ofd->fd); + write_ofd->fd = -1; + goto out_read; + } + + return 0; + +out_read: + close(hdl->read_ofd[q].fd); + osmo_fd_unregister(&hdl->read_ofd[q]); + + return rc; +} + +int l1if_transport_close(int q, struct femtol1_hdl *hdl) +{ + struct osmo_fd *read_ofd = &hdl->read_ofd[q]; + struct osmo_fd *write_ofd = &hdl->write_q[q].bfd; + + osmo_fd_unregister(read_ofd); + close(read_ofd->fd); + read_ofd->fd = -1; + + osmo_fd_unregister(write_ofd); + close(write_ofd->fd); + write_ofd->fd = -1; + + return 0; +} |