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 devopts[] = {
  30         SR_CONF_MULTIMETER,
  31         SR_CONF_CONTINUOUS,
  32         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  33         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  34 };
  35
  36 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  37 {
  38         GSList *usb_devices, *devices, *l;
  39         struct drv_context *drvc;
  40         struct dev_context *devc;
  41         struct sr_dev_inst *sdi;
  42         struct sr_usb_dev_inst *usb;
  43         struct sr_config *src;
  44         const char *conn;
  45
  46         drvc = di->context;
  47
  48         conn = BRYMEN_BC86X;
  49         for (l = options; l; l = l->next) {
  50                 src = l->data;
  51                 switch (src->key) {
  52                 case SR_CONF_CONN:
  53                         conn = g_variant_get_string(src->data, NULL);
  54                         break;
  55                 }
  56         }
  57
  58         devices = NULL;
  59         if (!(usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) {
  60                 g_slist_free_full(usb_devices, g_free);
  61                 return NULL;
  62         }
  63
  64         for (l = usb_devices; l; l = l->next) {
  65                 usb = l->data;
  66
  67                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
  68                 sdi->status = SR_ST_INACTIVE;
  69                 sdi->vendor = g_strdup("Brymen");
  70                 sdi->model = g_strdup("BM869");
  71                 devc = g_malloc0(sizeof(struct dev_context));
  72                 sdi->priv = devc;
  73                 sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P1");
  74                 sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "P2");
  75
  76                 sdi->inst_type = SR_INST_USB;
  77                 sdi->conn = usb;
  78
  79                 sr_sw_limits_init(&devc->sw_limits);
  80
  81                 devices = g_slist_append(devices, sdi);
  82         }
  83
  84         return std_scan_complete(di, devices);
  85 }
  86
  87 static int dev_open(struct sr_dev_inst *sdi)
  88 {
  89         struct sr_dev_driver *di = sdi->driver;
  90         struct drv_context *drvc = di->context;
  91         struct sr_usb_dev_inst *usb;
  92         struct dev_context *devc;
  93         int ret;
  94
  95         usb = sdi->conn;
  96         devc = sdi->priv;
  97
  98         if ((ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb)) == SR_OK)
  99                 sdi->status = SR_ST_ACTIVE;
 100         else
 101                 return SR_ERR;
 102
 103         /* Detach kernel drivers which grabbed this device (if any). */
 104         if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
 105                 ret = libusb_detach_kernel_driver(usb->devhdl, 0);
 106                 if (ret < 0) {
 107                         sr_err("Failed to detach kernel driver: %s.",
 108                                libusb_error_name(ret));
 109                         return SR_ERR;
 110                 }
 111                 devc->detached_kernel_driver = 1;
 112                 sr_dbg("Successfully detached kernel driver.");
 113         } else {
 114                 sr_dbg("No need to detach a kernel driver.");
 115         }
 116
 117         /* Claim interface 0. */
 118         if ((ret = libusb_claim_interface(usb->devhdl, 0)) < 0) {
 119                 sr_err("Failed to claim interface 0: %s.",
 120                        libusb_error_name(ret));
 121                 return SR_ERR;
 122         }
 123         sr_dbg("Successfully claimed interface 0.");
 124
 125         return ret;
 126 }
 127
 128 static int dev_close(struct sr_dev_inst *sdi)
 129 {
 130         struct sr_usb_dev_inst *usb;
 131         struct dev_context *devc;
 132         int ret;
 133
 134         if (sdi->status != SR_ST_ACTIVE)
 135                 return SR_ERR_DEV_CLOSED;
 136
 137         usb = sdi->conn;
 138         devc = sdi->priv;
 139
 140         if ((ret = libusb_release_interface(usb->devhdl, 0)))
 141                 sr_err("Failed to release interface 0: %s.\n", libusb_error_name(ret));
 142         else
 143                 sr_dbg("Successfully released interface 0.\n");
 144
 145         if (!ret && devc->detached_kernel_driver) {
 146                 if ((ret = libusb_attach_kernel_driver(usb->devhdl, 0))) {
 147                         sr_err("Failed to attach kernel driver: %s.\n",
 148                                libusb_error_name(ret));
 149                 } else {
 150                         devc->detached_kernel_driver = 0;
 151                         sr_dbg("Successfully attached kernel driver.\n");
 152                 }
 153         }
 154
 155         libusb_close(usb->devhdl);
 156
 157         sdi->status = SR_ST_INACTIVE;
 158
 159         return ret;
 160 }
 161
 162 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 163                 const struct sr_channel_group *cg)
 164 {
 165         struct dev_context *devc = sdi->priv;
 166
 167         (void)cg;
 168
 169         return sr_sw_limits_config_get(&devc->sw_limits, key, data);
 170 }
 171
 172 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 173                 const struct sr_channel_group *cg)
 174 {
 175         struct dev_context *devc;
 176
 177         (void)cg;
 178
 179         devc = sdi->priv;
 180
 181         return sr_sw_limits_config_set(&devc->sw_limits, key, data);
 182 }
 183
 184 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 185                 const struct sr_channel_group *cg)
 186 {
 187         (void)sdi;
 188         (void)cg;
 189
 190         switch (key) {
 191         case SR_CONF_SCAN_OPTIONS:
 192                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 193                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 194                 break;
 195         case SR_CONF_DEVICE_OPTIONS:
 196                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 197                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 198                 break;
 199         default:
 200                 return SR_ERR_NA;
 201         }
 202
 203         return SR_OK;
 204 }
 205
 206 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 207 {
 208         struct dev_context *devc;
 209
 210         devc = sdi->priv;
 211
 212         sr_sw_limits_acquisition_start(&devc->sw_limits);
 213
 214         std_session_send_df_header(sdi);
 215
 216         sr_session_source_add(sdi->session, -1, 0, 10,
 217                         brymen_bm86x_receive_data, (void *)sdi);
 218
 219         return SR_OK;
 220 }
 221
 222 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 223 {
 224         std_session_send_df_end(sdi);
 225
 226         sr_session_source_remove(sdi->session, -1);
 227
 228         return SR_OK;
 229 }
 230
 231 static struct sr_dev_driver brymen_bm86x_driver_info = {
 232         .name = "brymen-bm86x",
 233         .longname = "Brymen BM86X",
 234         .api_version = 1,
 235         .init = std_init,
 236         .cleanup = std_cleanup,
 237         .scan = scan,
 238         .dev_list = std_dev_list,
 239         .dev_clear = NULL,
 240         .config_get = config_get,
 241         .config_set = config_set,
 242         .config_list = config_list,
 243         .dev_open = dev_open,
 244         .dev_close = dev_close,
 245         .dev_acquisition_start = dev_acquisition_start,
 246         .dev_acquisition_stop = dev_acquisition_stop,
 247         .context = NULL,
 248 };
 249 SR_REGISTER_DEV_DRIVER(brymen_bm86x_driver_info);