src/hardware/saleae-logic-pro/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2017 Jan Luebbe <jluebbe@lasnet.de>
   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 <glib.h>
  22 #include <string.h>
  23 #include "protocol.h"
  24
  25 #define BUF_COUNT 8
  26 #define BUF_SIZE (16 * 1024)
  27 #define BUF_TIMEOUT (1000 * 1000)
  28
  29 SR_PRIV struct sr_dev_driver saleae_logic_pro_driver_info;
  30
  31 static const uint32_t drvopts[] = {
  32         SR_CONF_LOGIC_ANALYZER,
  33 };
  34
  35 static const uint32_t scanopts[] = {
  36         SR_CONF_CONN,
  37 };
  38
  39 static const uint32_t devopts[] = {
  40         SR_CONF_CONTINUOUS,
  41         SR_CONF_CONN | SR_CONF_GET,
  42         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  43 };
  44
  45 static const char *channel_names[] = {
  46         "0", "1", "2", "3", "4", "5", "6", "7",
  47         "8", "9", "10", "11", "12", "13", "14", "15",
  48 };
  49
  50 static const uint64_t samplerates[] = {
  51         SR_MHZ(1),
  52         SR_MHZ(2),
  53         SR_KHZ(2500),
  54         SR_MHZ(10),
  55         SR_MHZ(25),
  56         SR_MHZ(50),
  57 };
  58
  59 static gboolean scan_firmware(libusb_device *dev)
  60 {
  61         struct libusb_device_descriptor des;
  62         struct libusb_device_handle *hdl;
  63         gboolean ret;
  64         unsigned char strdesc[64];
  65
  66         hdl = NULL;
  67         ret = FALSE;
  68
  69         libusb_get_device_descriptor(dev, &des);
  70
  71         if (libusb_open(dev, &hdl) != 0)
  72                 goto out;
  73
  74         if (libusb_get_string_descriptor_ascii(hdl,
  75                 des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
  76                 goto out;
  77         if (strcmp((const char *)strdesc, "Saleae"))
  78                 goto out;
  79
  80         if (libusb_get_string_descriptor_ascii(hdl,
  81                 des.iProduct, strdesc, sizeof(strdesc)) < 0)
  82                 goto out;
  83         if (strcmp((const char *)strdesc, "Logic Pro"))
  84                 goto out;
  85
  86         ret = TRUE;
  87
  88 out:
  89         if (hdl)
  90                 libusb_close(hdl);
  91
  92         return ret;
  93 }
  94
  95 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  96 {
  97         struct drv_context *drvc;
  98         struct dev_context *devc;
  99         struct sr_dev_inst *sdi;
 100         GSList *devices, *conn_devices;
 101         libusb_device **devlist;
 102         struct libusb_device_descriptor des;
 103         const char *conn;
 104         char connection_id[64];
 105
 106         devices = NULL;
 107         drvc = di->context;
 108         drvc->instances = NULL;
 109
 110         conn = NULL;
 111         for (GSList *l = options; l; l = l->next) {
 112                 struct sr_config *src = l->data;
 113
 114                 switch (src->key) {
 115                 case SR_CONF_CONN:
 116                         conn = g_variant_get_string(src->data, NULL);
 117                         break;
 118                 }
 119         }
 120
 121         if (conn)
 122                 conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
 123         else
 124                 conn_devices = NULL;
 125
 126         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 127         for (unsigned int i = 0; devlist[i]; i++) {
 128                 if (conn) {
 129                         struct sr_usb_dev_inst *usb = NULL;
 130                         GSList *l;
 131
 132                         for (l = conn_devices; l; l = l->next) {
 133                                 usb = l->data;
 134                                 if (usb->bus == libusb_get_bus_number(devlist[i])
 135                                     && usb->address == libusb_get_device_address(devlist[i]))
 136                                         break;
 137                         }
 138                         if (!l)
 139                                 /* This device matched none of the ones that
 140                                  * matched the conn specification. */
 141                                 continue;
 142                 }
 143
 144                 libusb_get_device_descriptor(devlist[i], &des);
 145
 146                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 147
 148                 if (des.idVendor != 0x21a9 || des.idProduct != 0x1006)
 149                         continue;
 150
 151                 if (!scan_firmware(devlist[i])) {
 152                         sr_err("Found a Logic Pro device, but firmware is not loaded (use Saleae application).");
 153                         continue;
 154                 }
 155
 156                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 157                 sdi->status = SR_ST_INITIALIZING;
 158                 sdi->vendor = g_strdup("Saleae");
 159                 sdi->model = g_strdup("Logic Pro 16");
 160                 sdi->connection_id = g_strdup(connection_id);
 161
 162                 for (unsigned int j = 0; j < ARRAY_SIZE(channel_names); j++)
 163                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 164                                        channel_names[j]);
 165
 166                 sr_dbg("Found a Logic Pro 16 device.");
 167                 sdi->status = SR_ST_INACTIVE;
 168                 sdi->inst_type = SR_INST_USB;
 169                 sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
 170                                                 libusb_get_device_address(devlist[i]), NULL);
 171
 172                 devc = g_malloc0(sizeof(struct dev_context));
 173                 sdi->priv = devc;
 174                 devices = g_slist_append(devices, sdi);
 175
 176         }
 177         libusb_free_device_list(devlist, 1);
 178         g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
 179
 180         return std_scan_complete(di, devices);
 181 }
 182
 183 static int dev_clear(const struct sr_dev_driver *di)
 184 {
 185         return std_dev_clear(di, NULL);
 186 }
 187
 188 static int dev_open(struct sr_dev_inst *sdi)
 189 {
 190         struct sr_dev_driver *di = sdi->driver;
 191         struct drv_context *drvc = di->context;
 192         struct dev_context *devc = sdi->priv;
 193         struct sr_usb_dev_inst *usb = sdi->conn;
 194         int ret;
 195
 196         if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
 197                 return SR_ERR;
 198
 199         if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
 200                 sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
 201                 return SR_ERR;
 202         }
 203
 204         /* Configure default samplerate. */
 205         if (devc->dig_samplerate == 0)
 206                 devc->dig_samplerate = samplerates[3];
 207
 208         sdi->status = SR_ST_ACTIVE;
 209
 210         return SR_OK;
 211 }
 212
 213 static int dev_close(struct sr_dev_inst *sdi)
 214 {
 215         struct sr_usb_dev_inst *usb = sdi->conn;
 216
 217         sr_usb_close(usb);
 218
 219         sdi->status = SR_ST_INACTIVE;
 220
 221         return SR_OK;
 222 }
 223
 224 static int config_get(uint32_t key, GVariant **data,
 225                       const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 226 {
 227         struct sr_usb_dev_inst *usb;
 228         struct dev_context *devc;
 229         int ret;
 230
 231         (void)cg;
 232
 233         ret = SR_OK;
 234         switch (key) {
 235         case SR_CONF_CONN:
 236                 if (!sdi || !sdi->conn)
 237                         return SR_ERR_ARG;
 238                 usb = sdi->conn;
 239                 *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
 240                 break;
 241         case SR_CONF_SAMPLERATE:
 242                 if (!sdi)
 243                         return SR_ERR;
 244                 devc = sdi->priv;
 245                 *data = g_variant_new_uint64(devc->dig_samplerate);
 246                 break;
 247         default:
 248                 return SR_ERR_NA;
 249         }
 250
 251         return ret;
 252 }
 253
 254 static int config_set(uint32_t key, GVariant *data,
 255                       const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 256 {
 257         struct dev_context *devc;
 258         int ret;
 259
 260         (void)cg;
 261
 262         devc = sdi->priv;
 263
 264         ret = SR_OK;
 265         switch (key) {
 266         case SR_CONF_SAMPLERATE:
 267                 devc->dig_samplerate = g_variant_get_uint64(data);
 268                 break;
 269         default:
 270                 ret = SR_ERR_NA;
 271         }
 272
 273         return ret;
 274 }
 275
 276 static int config_list(uint32_t key, GVariant **data,
 277                        const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 278 {
 279         GVariant *gvar;
 280         GVariantBuilder gvb;
 281         int ret;
 282
 283         (void)sdi;
 284         (void)cg;
 285
 286         ret = SR_OK;
 287         switch (key) {
 288         case SR_CONF_SCAN_OPTIONS:
 289                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 290                         scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 291                 break;
 292         case SR_CONF_DEVICE_OPTIONS:
 293                 if (!sdi) {
 294                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 295                                 drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 296                 } else {
 297                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 298                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 299                 }
 300                 break;
 301         case SR_CONF_SAMPLERATE:
 302                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 303                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 304                         samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
 305                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 306                 *data = g_variant_builder_end(&gvb);
 307                 break;
 308         default:
 309                 return SR_ERR_NA;
 310         }
 311
 312         return ret;
 313 }
 314
 315 static void dev_acquisition_abort(const struct sr_dev_inst *sdi)
 316 {
 317         struct dev_context *devc = sdi->priv;
 318         unsigned int i;
 319
 320         for (i = 0; i < devc->num_transfers; i++) {
 321                 if (devc->transfers[i])
 322                         libusb_cancel_transfer(devc->transfers[i]);
 323         }
 324 }
 325
 326 static int dev_acquisition_handle(int fd, int revents, void *cb_data)
 327 {
 328         struct sr_dev_inst *sdi = cb_data;
 329         struct drv_context *drvc = sdi->driver->context;
 330         struct timeval tv = ALL_ZERO;
 331
 332         (void)fd;
 333         (void)revents;
 334
 335         libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
 336
 337         return TRUE;
 338 }
 339
 340 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 341 {
 342         struct dev_context *devc = sdi->priv;
 343         struct drv_context *drvc = sdi->driver->context;
 344         struct libusb_transfer *transfer;
 345         struct sr_usb_dev_inst *usb;
 346         uint8_t *buf;
 347         unsigned int i, ret;
 348
 349         ret = saleae_logic_pro_init(sdi);
 350         if (ret != SR_OK)
 351                 return ret;
 352
 353         ret = saleae_logic_pro_prepare(sdi);
 354         if (ret != SR_OK)
 355                 return ret;
 356
 357         usb = sdi->conn;
 358
 359         devc->conv_buffer = g_malloc(CONV_BUFFER_SIZE);
 360
 361         devc->num_transfers = BUF_COUNT;
 362         devc->transfers = g_malloc0(sizeof(*devc->transfers) * BUF_COUNT);
 363         for (i = 0; i < devc->num_transfers; i++) {
 364                 buf = g_malloc(BUF_SIZE);
 365                 transfer = libusb_alloc_transfer(0);
 366                 libusb_fill_bulk_transfer(transfer, usb->devhdl,
 367                         2 | LIBUSB_ENDPOINT_IN, buf, BUF_SIZE,
 368                         saleae_logic_pro_receive_data, (void *)sdi, BUF_TIMEOUT);
 369                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 370                         sr_err("Failed to submit transfer: %s.",
 371                                libusb_error_name(ret));
 372                         libusb_free_transfer(transfer);
 373                         g_free(buf);
 374                         dev_acquisition_abort(sdi);
 375                         return SR_ERR;
 376                 }
 377                 devc->transfers[i] = transfer;
 378                 devc->submitted_transfers++;
 379         }
 380
 381         usb_source_add(sdi->session, drvc->sr_ctx, BUF_TIMEOUT, dev_acquisition_handle, (void *)sdi);
 382
 383         std_session_send_df_header(sdi);
 384
 385         saleae_logic_pro_start(sdi);
 386         if (ret != SR_OK)
 387                 return ret;
 388
 389         return SR_OK;
 390 }
 391
 392 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 393 {
 394         struct dev_context *devc = sdi->priv;
 395         struct drv_context *drvc = sdi->driver->context;
 396
 397         saleae_logic_pro_stop(sdi);
 398
 399         std_session_send_df_end(sdi);
 400
 401         usb_source_remove(sdi->session, drvc->sr_ctx);
 402
 403         g_free(devc->conv_buffer);
 404
 405         return SR_OK;
 406 }
 407
 408 SR_PRIV struct sr_dev_driver saleae_logic_pro_driver_info = {
 409         .name = "saleae-logic-pro",
 410         .longname = "Saleae Logic Pro",
 411         .api_version = 1,
 412         .init = std_init,
 413         .cleanup = std_cleanup,
 414         .scan = scan,
 415         .dev_list = std_dev_list,
 416         .dev_clear = dev_clear,
 417         .config_get = config_get,
 418         .config_set = config_set,
 419         .config_list = config_list,
 420         .dev_open = dev_open,
 421         .dev_close = dev_close,
 422         .dev_acquisition_start = dev_acquisition_start,
 423         .dev_acquisition_stop = dev_acquisition_stop,
 424         .context = NULL,
 425 };
 426
 427 SR_REGISTER_DEV_DRIVER(saleae_logic_pro_driver_info);