+++ /dev/null
-/*
- * uqmi -- tiny QMI support implementation
- *
- * Copyright (C) 2014-2015 Felix Fietkau <nbd@openwrt.org>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301 USA.
- */
-
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include "uqmi.h"
-#include "qmi-errors.h"
-#include "qmi-errors.c"
-#include "mbim.h"
-
-bool cancel_all_requests = false;
-
-#define __qmi_service(_n) [__##_n] = _n
-static const uint8_t qmi_services[__QMI_SERVICE_LAST] = {
- __qmi_services
-};
-#undef __qmi_service
-
-#ifdef DEBUG_PACKET
-void dump_packet(const char *prefix, void *ptr, int len)
-{
- unsigned char *data = ptr;
- int i;
-
- fprintf(stderr, "%s:", prefix);
- for (i = 0; i < len; i++)
- fprintf(stderr, " %02x", data[i]);
- fprintf(stderr, "\n");
-}
-#endif
-
-static int
-qmi_get_service_idx(QmiService svc)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(qmi_services); i++)
- if (qmi_services[i] == svc)
- return i;
-
- return -1;
-}
-
-static bool qmi_message_is_response(struct qmi_msg *msg)
-{
- if (msg->qmux.service == QMI_SERVICE_CTL) {
- if (msg->flags & QMI_CTL_FLAG_RESPONSE)
- return true;
- }
- else {
- if (msg->flags & QMI_SERVICE_FLAG_RESPONSE)
- return true;
- }
-
- return false;
-}
-
-static void __qmi_request_complete(struct qmi_dev *qmi, struct qmi_request *req, struct qmi_msg *msg)
-{
- void *tlv_buf;
- int tlv_len;
-
- if (!req->pending)
- return;
-
- req->pending = false;
- list_del(&req->list);
-
- if (msg) {
- tlv_buf = qmi_msg_get_tlv_buf(msg, &tlv_len);
- req->ret = qmi_check_message_status(tlv_buf, tlv_len);
- if (req->ret)
- msg = NULL;
- } else {
- req->ret = QMI_ERROR_CANCELLED;
- }
-
- if (req->cb && (msg || !req->no_error_cb))
- req->cb(qmi, req, msg);
-
- if (req->complete) {
- *req->complete = true;
- uloop_cancelled = true;
- }
-}
-
-static void qmi_process_msg(struct qmi_dev *qmi, struct qmi_msg *msg)
-{
- struct qmi_request *req;
- uint16_t tid;
-
- if (!qmi_message_is_response(msg))
- return;
-
- if (msg->qmux.service == QMI_SERVICE_CTL)
- tid = msg->ctl.transaction;
- else
- tid = le16_to_cpu(msg->svc.transaction);
-
- list_for_each_entry(req, &qmi->req, list) {
- if (req->service != msg->qmux.service)
- continue;
-
- if (req->tid != tid)
- continue;
-
- __qmi_request_complete(qmi, req, msg);
- return;
- }
-}
-
-static void qmi_notify_read(struct ustream *us, int bytes)
-{
- struct qmi_dev *qmi = container_of(us, struct qmi_dev, sf.stream);
- struct qmi_msg *msg;
- char *buf;
- int len, msg_len;
-
-
- while (1) {
- buf = ustream_get_read_buf(us, &len);
- if (!buf || !len)
- return;
-
- dump_packet("Received packet", buf, len);
- if (qmi->is_mbim) {
- struct mbim_command_message *mbim = (void *) buf;
-
- if (len < sizeof(*mbim))
- return;
- msg = (struct qmi_msg *) (buf + sizeof(*mbim));
- msg_len = le32_to_cpu(mbim->header.length);
- if (!is_mbim_qmi(mbim)) {
- /* must consume other MBIM packets */
- ustream_consume(us, msg_len);
- return;
- }
- } else {
- if (len < offsetof(struct qmi_msg, flags))
- return;
- msg = (struct qmi_msg *) buf;
- msg_len = le16_to_cpu(msg->qmux.len) + 1;
- }
-
- if (len < msg_len)
- return;
-
- qmi_process_msg(qmi, msg);
- ustream_consume(us, msg_len);
- }
-}
-
-int qmi_request_start(struct qmi_dev *qmi, struct qmi_request *req, request_cb cb)
-{
- struct qmi_msg *msg = qmi->buf;
- int len = qmi_complete_request_message(msg);
- uint16_t tid;
- void *buf = (void *) qmi->buf;
-
- memset(req, 0, sizeof(*req));
- req->ret = -1;
- req->service = msg->qmux.service;
- if (req->service == QMI_SERVICE_CTL) {
- tid = qmi->ctl_tid++;
- msg->ctl.transaction = tid;
- } else {
- int idx = qmi_get_service_idx(req->service);
-
- if (idx < 0)
- return -1;
-
- tid = qmi->service_data[idx].tid++;
- msg->svc.transaction = cpu_to_le16(tid);
- msg->qmux.client = qmi->service_data[idx].client_id;
- }
-
- req->tid = tid;
- req->cb = cb;
- req->pending = true;
- list_add(&req->list, &qmi->req);
-
- if (qmi->is_mbim) {
- buf -= sizeof(struct mbim_command_message);
- mbim_qmi_cmd((struct mbim_command_message *) buf, len, tid);
- len += sizeof(struct mbim_command_message);
- }
-
- dump_packet("Send packet", buf, len);
- ustream_write(&qmi->sf.stream, buf, len, false);
- return 0;
-}
-
-void qmi_request_cancel(struct qmi_dev *qmi, struct qmi_request *req)
-{
- req->cb = NULL;
- __qmi_request_complete(qmi, req, NULL);
-}
-
-int qmi_request_wait(struct qmi_dev *qmi, struct qmi_request *req)
-{
- bool complete = false;
- bool cancelled;
-
- if (!req->pending)
- return req->ret;
-
- if (req->complete)
- *req->complete = true;
-
- req->complete = &complete;
- while (!complete) {
- cancelled = uloop_cancelled;
- uloop_cancelled = false;
- uloop_run();
-
- if (cancel_all_requests)
- qmi_request_cancel(qmi, req);
-
- uloop_cancelled = cancelled;
- }
-
- if (req->complete == &complete)
- req->complete = NULL;
-
- return req->ret;
-}
-
-struct qmi_connect_request {
- struct qmi_request req;
- int cid;
-};
-
-static void qmi_connect_service_cb(struct qmi_dev *qmi, struct qmi_request *req, struct qmi_msg *msg)
-{
- struct qmi_ctl_allocate_cid_response res;
- struct qmi_connect_request *creq = container_of(req, struct qmi_connect_request, req);
-
- if (!msg)
- return;
-
- qmi_parse_ctl_allocate_cid_response(msg, &res);
- creq->cid = res.data.allocation_info.cid;
-}
-
-int qmi_service_connect(struct qmi_dev *qmi, QmiService svc, int client_id)
-{
- struct qmi_ctl_allocate_cid_request creq = {
- QMI_INIT(service, svc)
- };
- struct qmi_connect_request req;
- int idx = qmi_get_service_idx(svc);
- struct qmi_msg *msg = qmi->buf;
-
- if (idx < 0)
- return -1;
-
- if (qmi->service_connected & (1 << idx))
- return 0;
-
- if (client_id < 0) {
- qmi_set_ctl_allocate_cid_request(msg, &creq);
- qmi_request_start(qmi, &req.req, qmi_connect_service_cb);
- qmi_request_wait(qmi, &req.req);
-
- if (req.req.ret)
- return req.req.ret;
-
- client_id = req.cid;
- } else {
- qmi->service_keep_cid |= (1 << idx);
- }
-
- qmi->service_data[idx].connected = true;
- qmi->service_data[idx].client_id = client_id;
- qmi->service_data[idx].tid = 1;
- qmi->service_connected |= (1 << idx);
-
- return 0;
-}
-
-static void __qmi_service_disconnect(struct qmi_dev *qmi, int idx)
-{
- int client_id = qmi->service_data[idx].client_id;
- struct qmi_ctl_release_cid_request creq = {
- QMI_INIT_SEQUENCE(release_info,
- .service = qmi_services[idx],
- .cid = client_id,
- )
- };
- struct qmi_request req;
- struct qmi_msg *msg = qmi->buf;
-
- qmi->service_connected &= ~(1 << idx);
- qmi->service_data[idx].client_id = -1;
- qmi->service_data[idx].tid = 0;
-
- qmi_set_ctl_release_cid_request(msg, &creq);
- qmi_request_start(qmi, &req, NULL);
- qmi_request_wait(qmi, &req);
-}
-
-int qmi_service_release_client_id(struct qmi_dev *qmi, QmiService svc)
-{
- int idx = qmi_get_service_idx(svc);
- qmi->service_release_cid |= 1 << idx;
- return 0;
-}
-
-static void qmi_close_all_services(struct qmi_dev *qmi)
-{
- uint32_t connected = qmi->service_connected;
- int idx;
-
- qmi->service_keep_cid &= ~qmi->service_release_cid;
- for (idx = 0; connected; idx++, connected >>= 1) {
- if (!(connected & 1))
- continue;
-
- if (qmi->service_keep_cid & (1 << idx))
- continue;
-
- __qmi_service_disconnect(qmi, idx);
- }
-}
-
-int qmi_service_get_client_id(struct qmi_dev *qmi, QmiService svc)
-{
- int idx = qmi_get_service_idx(svc);
-
- if (idx < 0)
- return -1;
-
- qmi->service_keep_cid |= (1 << idx);
- return qmi->service_data[idx].client_id;
-}
-
-int qmi_device_open(struct qmi_dev *qmi, const char *path)
-{
- static struct {
- struct mbim_command_message mbim;
- union {
- char buf[2048];
- struct qmi_msg msg;
- } u;
- } __packed msgbuf;
- struct ustream *us = &qmi->sf.stream;
- int fd;
-
- uloop_init();
-
- fd = open(path, O_RDWR | O_EXCL | O_NONBLOCK | O_NOCTTY);
- if (fd < 0)
- return -1;
-
- us->notify_read = qmi_notify_read;
- ustream_fd_init(&qmi->sf, fd);
- INIT_LIST_HEAD(&qmi->req);
- qmi->ctl_tid = 1;
- qmi->buf = msgbuf.u.buf;
-
- return 0;
-}
-
-void qmi_device_close(struct qmi_dev *qmi)
-{
- struct qmi_request *req;
-
- qmi_close_all_services(qmi);
- ustream_free(&qmi->sf.stream);
- close(qmi->sf.fd.fd);
-
- while (!list_empty(&qmi->req)) {
- req = list_first_entry(&qmi->req, struct qmi_request, list);
- qmi_request_cancel(qmi, req);
- }
-}
-
-QmiService qmi_service_get_by_name(const char *str)
-{
- static const struct {
- const char *name;
- QmiService svc;
- } services[] = {
- { "dms", QMI_SERVICE_DMS },
- { "nas", QMI_SERVICE_NAS },
- { "pds", QMI_SERVICE_PDS },
- { "wds", QMI_SERVICE_WDS },
- { "wms", QMI_SERVICE_WMS },
- { "wda", QMI_SERVICE_WDA },
- { "uim", QMI_SERVICE_UIM },
- };
- int i;
-
- for (i = 0; i < ARRAY_SIZE(services); i++) {
- if (!strcasecmp(str, services[i].name))
- return services[i].svc;
- }
-
- return -1;
-}
-
-const char *qmi_get_error_str(int code)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(qmi_errors); i++) {
- if (qmi_errors[i].code == code)
- return qmi_errors[i].text;
- }
-
- return "Unknown error";
-}
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