src/hardware/ipdbg-la/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2016 Eva Kissling <eva.kissling@bluewin.ch>
   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 static const uint32_t drvopts[] = {
  24         SR_CONF_LOGIC_ANALYZER,
  25 };
  26
  27 static const uint32_t scanopts[] = {
  28         SR_CONF_CONN,
  29 };
  30
  31 static const uint32_t devopts[] = {
  32         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  33         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  34         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  35 };
  36
  37 static const int32_t trigger_matches[] = {
  38         SR_TRIGGER_ZERO,
  39         SR_TRIGGER_ONE,
  40         SR_TRIGGER_RISING,
  41         SR_TRIGGER_FALLING,
  42         SR_TRIGGER_EDGE,
  43 };
  44
  45 SR_PRIV struct sr_dev_driver ipdbg_la_driver_info;
  46
  47 static void ipdbg_la_split_addr_port(const char *conn, char **addr,
  48         char **port)
  49 {
  50         char **strs = g_strsplit(conn, "/", 3);
  51
  52         *addr = g_strdup(strs[1]);
  53         *port = g_strdup(strs[2]);
  54
  55         g_strfreev(strs);
  56 }
  57
  58 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  59 {
  60         struct drv_context *drvc;
  61         GSList *devices;
  62
  63         devices = NULL;
  64         drvc = di->context;
  65         drvc->instances = NULL;
  66         const char *conn;
  67         struct sr_config *src;
  68         GSList *l;
  69
  70         conn = NULL;
  71         for (l = options; l; l = l->next) {
  72                 src = l->data;
  73                 switch (src->key) {
  74                 case SR_CONF_CONN:
  75                         conn = g_variant_get_string(src->data, NULL);
  76                         break;
  77                 }
  78         }
  79
  80         if (!conn)
  81                 return NULL;
  82
  83         struct ipdbg_la_tcp *tcp = ipdbg_la_tcp_new();
  84
  85         ipdbg_la_split_addr_port(conn, &tcp->address, &tcp->port);
  86
  87         if (!tcp->address)
  88                 return NULL;
  89
  90         if (ipdbg_la_tcp_open(tcp) != SR_OK)
  91                 return NULL;
  92
  93         ipdbg_la_send_reset(tcp);
  94         ipdbg_la_send_reset(tcp);
  95
  96         if (ipdbg_la_request_id(tcp) != SR_OK)
  97                 return NULL;
  98
  99         struct sr_dev_inst *sdi = g_malloc0(sizeof(struct sr_dev_inst));
 100         if (!sdi) {
 101                 sr_err("no possible to allocate sr_dev_inst");
 102                 return NULL;
 103         }
 104
 105         sdi->status = SR_ST_INACTIVE;
 106         sdi->vendor = g_strdup("ipdbg.org");
 107         sdi->model = g_strdup("IPDBG LA");
 108         sdi->version = g_strdup("v1.0");
 109         sdi->driver = di;
 110
 111         struct dev_context *devc = ipdbg_la_dev_new();
 112         sdi->priv = devc;
 113
 114         ipdbg_la_get_addrwidth_and_datawidth(tcp, devc);
 115
 116         sr_dbg("addr_width = %d, data_width = %d\n", devc->ADDR_WIDTH,
 117                 devc->DATA_WIDTH);
 118         sr_dbg("limit samples = %" PRIu64 "\n", devc->limit_samples_max);
 119
 120         for (uint32_t i = 0; i < devc->DATA_WIDTH; i++) {
 121                 const uint8_t buf_size = 16;
 122                 char buf[buf_size];
 123                 snprintf(buf, buf_size, "ch%d", i);
 124                 sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, buf);
 125         }
 126
 127         sdi->inst_type = SR_INST_USER;
 128         sdi->conn = tcp;
 129
 130         ipdbg_la_tcp_close(tcp);
 131
 132         devices = g_slist_append(devices, sdi);
 133
 134         return std_scan_complete(di, devices);
 135 }
 136
 137 static int dev_clear(const struct sr_dev_driver *di)
 138 {
 139         struct drv_context *drvc = di->context;
 140         struct sr_dev_inst *sdi;
 141         GSList *l;
 142
 143         if (drvc) {
 144                 for (l = drvc->instances; l; l = l->next) {
 145                         sdi = l->data;
 146                         struct ipdbg_la_tcp *tcp = sdi->conn;
 147                         if (tcp) {
 148                                 ipdbg_la_tcp_close(tcp);
 149                                 ipdbg_la_tcp_free(tcp);
 150                                 g_free(tcp);
 151                         }
 152                         sdi->conn = NULL;
 153                 }
 154         }
 155
 156         return std_dev_clear(di);
 157 }
 158
 159 static int dev_open(struct sr_dev_inst *sdi)
 160 {
 161         sdi->status = SR_ST_INACTIVE;
 162
 163         struct ipdbg_la_tcp *tcp = sdi->conn;
 164
 165         if (!tcp)
 166                 return SR_ERR;
 167
 168         if (ipdbg_la_tcp_open(tcp) != SR_OK)
 169                 return SR_ERR;
 170
 171         sdi->status = SR_ST_ACTIVE;
 172
 173         return SR_OK;
 174 }
 175
 176 static int dev_close(struct sr_dev_inst *sdi)
 177 {
 178         // Should be called before a new call to scan()
 179         struct ipdbg_la_tcp *tcp = sdi->conn;
 180
 181         if (tcp)
 182                 ipdbg_la_tcp_close(tcp);
 183
 184         sdi->conn = NULL;
 185         sdi->status = SR_ST_INACTIVE;
 186
 187         return SR_OK;
 188 }
 189
 190 static int config_get(uint32_t key, GVariant **data,
 191         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 192 {
 193         struct dev_context *devc = sdi->priv;
 194
 195         (void)cg;
 196
 197         switch (key) {
 198         case SR_CONF_CAPTURE_RATIO:
 199                 *data = g_variant_new_uint64(devc->capture_ratio);
 200                 break;
 201         case SR_CONF_LIMIT_SAMPLES:
 202                 *data = g_variant_new_uint64(devc->limit_samples);
 203                 break;
 204         default:
 205                 return SR_ERR_NA;
 206         }
 207
 208         return SR_OK;
 209 }
 210
 211 static int config_set(uint32_t key, GVariant *data,
 212         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 213 {
 214         struct dev_context *devc = sdi->priv;
 215
 216         (void)cg;
 217
 218         if (sdi->status != SR_ST_ACTIVE)
 219                 return SR_ERR_DEV_CLOSED;
 220
 221         switch (key) {
 222         case SR_CONF_CAPTURE_RATIO:
 223                 devc->capture_ratio = g_variant_get_uint64(data);
 224                 break;
 225         case SR_CONF_LIMIT_SAMPLES:
 226                 devc->limit_samples = g_variant_get_uint64(data);
 227                 break;
 228         default:
 229                 return SR_ERR_NA;
 230         }
 231
 232         return SR_OK;
 233 }
 234
 235 static int config_list(uint32_t key, GVariant **data,
 236         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 237 {
 238         switch (key) {
 239         case SR_CONF_SCAN_OPTIONS:
 240         case SR_CONF_DEVICE_OPTIONS:
 241                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 242         case SR_CONF_TRIGGER_MATCH:
 243                 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
 244                 break;
 245         default:
 246                 return SR_ERR_NA;
 247         }
 248
 249         return SR_OK;
 250 }
 251
 252 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
 253 {
 254         return std_init(di, sr_ctx);
 255 }
 256
 257 static GSList *dev_list(const struct sr_dev_driver *di)
 258 {
 259         return ((struct drv_context *)(di->context))->instances;
 260 }
 261
 262 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 263 {
 264         if (sdi->status != SR_ST_ACTIVE)
 265                 return SR_ERR_DEV_CLOSED;
 266
 267         struct ipdbg_la_tcp *tcp = sdi->conn;
 268         struct dev_context *devc = sdi->priv;
 269
 270         ipdbg_la_convert_trigger(sdi);
 271         ipdbg_la_send_trigger(devc, tcp);
 272         ipdbg_la_send_delay(devc, tcp);
 273
 274         /* If the device stops sending for longer than it takes to send a byte,
 275          * that means it's finished. But wait at least 100 ms to be safe.
 276          */
 277         sr_session_source_add(sdi->session, tcp->socket, G_IO_IN, 100,
 278                 ipdbg_la_receive_data, (struct sr_dev_inst *)sdi);
 279
 280         ipdbg_la_send_start(tcp);
 281
 282         return SR_OK;
 283 }
 284
 285 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 286 {
 287         struct ipdbg_la_tcp *tcp = sdi->conn;
 288         struct dev_context *devc = sdi->priv;
 289
 290         uint8_t byte;
 291
 292         if (devc->num_transfers > 0) {
 293                 while (devc->num_transfers <
 294                         (devc->limit_samples_max * devc->DATA_WIDTH_BYTES)) {
 295                         ipdbg_la_tcp_receive(tcp, &byte);
 296                         devc->num_transfers++;
 297                 }
 298         }
 299
 300         ipdbg_la_send_reset(tcp);
 301         ipdbg_la_abort_acquisition(sdi);
 302
 303         return SR_OK;
 304 }
 305
 306 SR_PRIV struct sr_dev_driver ipdbg_la_driver_info = {
 307         .name = "ipdbg-la",
 308         .longname = "IPDBG LA",
 309         .api_version = 1,
 310         .init = init,
 311         .cleanup = std_cleanup,
 312         .scan = scan,
 313         .dev_list = dev_list,
 314         .dev_clear = dev_clear,
 315         .config_get = config_get,
 316         .config_set = config_set,
 317         .config_list = config_list,
 318         .dev_open = dev_open,
 319         .dev_close = dev_close,
 320         .dev_acquisition_start = dev_acquisition_start,
 321         .dev_acquisition_stop = dev_acquisition_stop,
 322         .context = NULL,
 323 };
 324
 325 SR_REGISTER_DEV_DRIVER(ipdbg_la_driver_info);