src/hardware/brymen-bm86x/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include "protocol.h"
  22
  23 #define BRYMEN_BC86X "0820.0001"
  24
  25 static const uint32_t scanopts[] = {
  26         SR_CONF_CONN,
  27 };
  28
  29 static const uint32_t drvopts[] = {
  30         SR_CONF_MULTIMETER,
  31 };
  32
  33 static const uint32_t devopts[] = {
  34         SR_CONF_CONTINUOUS,
  35         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  36         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  37 };
  38
  39 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  40 {
  41         GSList *usb_devices, *devices, *l;
  42         struct drv_context *drvc;
  43         struct dev_context *devc;
  44         struct sr_dev_inst *sdi;
  45         struct sr_usb_dev_inst *usb;
  46         struct sr_config *src;
  47         const char *conn;
  48
  49         drvc = di->context;
  50
  51         conn = BRYMEN_BC86X;
  52         for (l = options; l; l = l->next) {
  53                 src = l->data;
  54                 switch (src->key) {
  55                 case SR_CONF_CONN:
  56                         conn = g_variant_get_string(src->data, NULL);
  57                         break;
  58                 }
  59         }
  60
  61         devices = NULL;
  62         if (!(usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn)))
  63                 return NULL;
  64
  65         for (l = usb_devices; l; l = l->next) {
  66                 usb = l->data;
  67
  68                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
  69                 sdi->status = SR_ST_INACTIVE;
  70                 sdi->vendor = g_strdup("Brymen");
  71                 sdi->model = g_strdup("BM869");
  72                 devc = g_malloc0(sizeof(struct dev_context));
  73                 sdi->priv = devc;
  74                 sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
  75                 sr_channel_new(sdi, 1, SR_CHANNEL_ANALOG, TRUE, "P2");
  76
  77                 sdi->inst_type = SR_INST_USB;
  78                 sdi->conn = usb;
  79
  80                 sr_sw_limits_init(&devc->sw_limits);
  81
  82                 devices = g_slist_append(devices, sdi);
  83         }
  84
  85         return std_scan_complete(di, devices);
  86 }
  87
  88 static int dev_open(struct sr_dev_inst *sdi)
  89 {
  90         struct sr_dev_driver *di = sdi->driver;
  91         struct drv_context *drvc = di->context;
  92         struct sr_usb_dev_inst *usb;
  93         struct dev_context *devc;
  94         int ret;
  95
  96         usb = sdi->conn;
  97         devc = sdi->priv;
  98
  99         if ((ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb)) < 0)
 100                 return SR_ERR;
 101
 102         if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
 103                 ret = libusb_detach_kernel_driver(usb->devhdl, 0);
 104                 if (ret < 0) {
 105                         sr_err("Failed to detach kernel driver: %s.",
 106                                libusb_error_name(ret));
 107                         return SR_ERR;
 108                 }
 109                 devc->detached_kernel_driver = 1;
 110         }
 111
 112         if ((ret = libusb_claim_interface(usb->devhdl, 0)) < 0) {
 113                 sr_err("Failed to claim interface 0: %s.",
 114                        libusb_error_name(ret));
 115                 return SR_ERR;
 116         }
 117
 118         return SR_OK;
 119 }
 120
 121 static int dev_close(struct sr_dev_inst *sdi)
 122 {
 123         struct sr_usb_dev_inst *usb;
 124         struct dev_context *devc;
 125         int ret;
 126
 127         usb = sdi->conn;
 128         devc = sdi->priv;
 129
 130         if (!usb->devhdl)
 131                 return SR_OK;
 132
 133         if ((ret = libusb_release_interface(usb->devhdl, 0)))
 134                 sr_err("Failed to release interface 0: %s.\n", libusb_error_name(ret));
 135
 136         if (!ret && devc->detached_kernel_driver) {
 137                 if ((ret = libusb_attach_kernel_driver(usb->devhdl, 0)))
 138                         sr_err("Failed to attach kernel driver: %s.\n",
 139                                libusb_error_name(ret));
 140                 else
 141                         devc->detached_kernel_driver = 0;
 142         }
 143
 144         libusb_close(usb->devhdl);
 145
 146         return (ret == 0) ? SR_OK : SR_ERR;
 147 }
 148
 149 static int config_get(uint32_t key, GVariant **data,
 150         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 151 {
 152         struct dev_context *devc = sdi->priv;
 153
 154         (void)cg;
 155
 156         return sr_sw_limits_config_get(&devc->sw_limits, key, data);
 157 }
 158
 159 static int config_set(uint32_t key, GVariant *data,
 160         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 161 {
 162         struct dev_context *devc;
 163
 164         (void)cg;
 165
 166         devc = sdi->priv;
 167
 168         return sr_sw_limits_config_set(&devc->sw_limits, key, data);
 169 }
 170
 171 static int config_list(uint32_t key, GVariant **data,
 172         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 173 {
 174         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 175 }
 176
 177 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 178 {
 179         struct dev_context *devc;
 180
 181         devc = sdi->priv;
 182
 183         sr_sw_limits_acquisition_start(&devc->sw_limits);
 184
 185         std_session_send_df_header(sdi);
 186
 187         sr_session_source_add(sdi->session, -1, 0, 10,
 188                         brymen_bm86x_receive_data, (void *)sdi);
 189
 190         return SR_OK;
 191 }
 192
 193 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 194 {
 195         std_session_send_df_end(sdi);
 196
 197         sr_session_source_remove(sdi->session, -1);
 198
 199         return SR_OK;
 200 }
 201
 202 static struct sr_dev_driver brymen_bm86x_driver_info = {
 203         .name = "brymen-bm86x",
 204         .longname = "Brymen BM86X",
 205         .api_version = 1,
 206         .init = std_init,
 207         .cleanup = std_cleanup,
 208         .scan = scan,
 209         .dev_list = std_dev_list,
 210         .dev_clear = std_dev_clear,
 211         .config_get = config_get,
 212         .config_set = config_set,
 213         .config_list = config_list,
 214         .dev_open = dev_open,
 215         .dev_close = dev_close,
 216         .dev_acquisition_start = dev_acquisition_start,
 217         .dev_acquisition_stop = dev_acquisition_stop,
 218         .context = NULL,
 219 };
 220 SR_REGISTER_DEV_DRIVER(brymen_bm86x_driver_info);