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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include <glib.h> | |
23 | #include <glib/gstdio.h> | |
24 | #include "protocol.h" | |
25 | #include "dslogic.h" | |
26 | ||
27 | #pragma pack(push, 1) | |
28 | ||
29 | struct version_info { | |
30 | uint8_t major; | |
31 | uint8_t minor; | |
32 | }; | |
33 | ||
34 | struct cmd_start_acquisition { | |
35 | uint8_t flags; | |
36 | uint8_t sample_delay_h; | |
37 | uint8_t sample_delay_l; | |
38 | }; | |
39 | ||
40 | #pragma pack(pop) | |
41 | ||
42 | #define USB_TIMEOUT 100 | |
43 | ||
44 | static int command_get_fw_version(libusb_device_handle *devhdl, | |
45 | struct version_info *vi) | |
46 | { | |
47 | int ret; | |
48 | ||
49 | ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR | | |
50 | LIBUSB_ENDPOINT_IN, DS_CMD_GET_FW_VERSION, 0x0000, 0x0000, | |
51 | (unsigned char *)vi, sizeof(struct version_info), USB_TIMEOUT); | |
52 | ||
53 | if (ret < 0) { | |
54 | sr_err("Unable to get version info: %s.", | |
55 | libusb_error_name(ret)); | |
56 | return SR_ERR; | |
57 | } | |
58 | ||
59 | return SR_OK; | |
60 | } | |
61 | ||
62 | static int command_get_revid_version(struct sr_dev_inst *sdi, uint8_t *revid) | |
63 | { | |
64 | struct sr_usb_dev_inst *usb = sdi->conn; | |
65 | libusb_device_handle *devhdl = usb->devhdl; | |
66 | int ret; | |
67 | ||
68 | ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR | | |
69 | LIBUSB_ENDPOINT_IN, DS_CMD_GET_REVID_VERSION, 0x0000, 0x0000, | |
70 | revid, 1, USB_TIMEOUT); | |
71 | ||
72 | if (ret < 0) { | |
73 | sr_err("Unable to get REVID: %s.", libusb_error_name(ret)); | |
74 | return SR_ERR; | |
75 | } | |
76 | ||
77 | return SR_OK; | |
78 | } | |
79 | ||
80 | SR_PRIV int dslogic_dev_open(struct sr_dev_inst *sdi, struct sr_dev_driver *di) | |
81 | { | |
82 | libusb_device **devlist; | |
83 | struct sr_usb_dev_inst *usb; | |
84 | struct libusb_device_descriptor des; | |
85 | struct dev_context *devc; | |
86 | struct drv_context *drvc; | |
87 | struct version_info vi; | |
88 | int ret, i, device_count; | |
89 | uint8_t revid; | |
90 | char connection_id[64]; | |
91 | ||
92 | drvc = di->context; | |
93 | devc = sdi->priv; | |
94 | usb = sdi->conn; | |
95 | ||
96 | if (sdi->status == SR_ST_ACTIVE) | |
97 | /* Device is already in use. */ | |
98 | return SR_ERR; | |
99 | ||
100 | device_count = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
101 | if (device_count < 0) { | |
102 | sr_err("Failed to get device list: %s.", | |
103 | libusb_error_name(device_count)); | |
104 | return SR_ERR; | |
105 | } | |
106 | ||
107 | for (i = 0; i < device_count; i++) { | |
108 | libusb_get_device_descriptor(devlist[i], &des); | |
109 | ||
110 | if (des.idVendor != devc->profile->vid | |
111 | || des.idProduct != devc->profile->pid) | |
112 | continue; | |
113 | ||
114 | if ((sdi->status == SR_ST_INITIALIZING) || | |
115 | (sdi->status == SR_ST_INACTIVE)) { | |
116 | /* | |
117 | * Check device by its physical USB bus/port address. | |
118 | */ | |
119 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
120 | if (strcmp(sdi->connection_id, connection_id)) | |
121 | /* This is not the one. */ | |
122 | continue; | |
123 | } | |
124 | ||
125 | if (!(ret = libusb_open(devlist[i], &usb->devhdl))) { | |
126 | if (usb->address == 0xff) | |
127 | /* | |
128 | * First time we touch this device after FW | |
129 | * upload, so we don't know the address yet. | |
130 | */ | |
131 | usb->address = libusb_get_device_address(devlist[i]); | |
132 | } else { | |
133 | sr_err("Failed to open device: %s.", | |
134 | libusb_error_name(ret)); | |
135 | break; | |
136 | } | |
137 | ||
138 | if (libusb_has_capability(LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) { | |
139 | if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) { | |
140 | if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) { | |
141 | sr_err("Failed to detach kernel driver: %s.", | |
142 | libusb_error_name(ret)); | |
143 | return SR_ERR; | |
144 | } | |
145 | } | |
146 | } | |
147 | ||
148 | ret = command_get_fw_version(usb->devhdl, &vi); | |
149 | if (ret != SR_OK) { | |
150 | sr_err("Failed to get firmware version."); | |
151 | break; | |
152 | } | |
153 | ||
154 | ret = command_get_revid_version(sdi, &revid); | |
155 | if (ret != SR_OK) { | |
156 | sr_err("Failed to get REVID."); | |
157 | break; | |
158 | } | |
159 | ||
160 | /* | |
161 | * Changes in major version mean incompatible/API changes, so | |
162 | * bail out if we encounter an incompatible version. | |
163 | * Different minor versions are OK, they should be compatible. | |
164 | */ | |
165 | if (vi.major != DSLOGIC_REQUIRED_VERSION_MAJOR) { | |
166 | sr_err("Expected firmware version %d.x, " | |
167 | "got %d.%d.", DSLOGIC_REQUIRED_VERSION_MAJOR, | |
168 | vi.major, vi.minor); | |
169 | break; | |
170 | } | |
171 | ||
172 | sdi->status = SR_ST_ACTIVE; | |
173 | sr_info("Opened device on %d.%d (logical) / %s (physical), " | |
174 | "interface %d, firmware %d.%d.", | |
175 | usb->bus, usb->address, connection_id, | |
176 | USB_INTERFACE, vi.major, vi.minor); | |
177 | ||
178 | sr_info("Detected REVID=%d, it's a Cypress CY7C68013%s.", | |
179 | revid, (revid != 1) ? " (FX2)" : "A (FX2LP)"); | |
180 | ||
181 | break; | |
182 | } | |
183 | libusb_free_device_list(devlist, 1); | |
184 | ||
185 | if (sdi->status != SR_ST_ACTIVE) | |
186 | return SR_ERR; | |
187 | ||
188 | return SR_OK; | |
189 | } | |
190 | ||
191 | SR_PRIV struct dev_context *dslogic_dev_new(void) | |
192 | { | |
193 | struct dev_context *devc; | |
194 | ||
195 | devc = g_malloc0(sizeof(struct dev_context)); | |
196 | devc->profile = NULL; | |
197 | devc->fw_updated = 0; | |
198 | devc->cur_samplerate = 0; | |
199 | devc->limit_samples = 0; | |
200 | devc->capture_ratio = 0; | |
201 | devc->continuous_mode = FALSE; | |
202 | devc->clock_edge = DS_EDGE_RISING; | |
203 | ||
204 | return devc; | |
205 | } | |
206 | ||
207 | SR_PRIV void dslogic_abort_acquisition(struct dev_context *devc) | |
208 | { | |
209 | int i; | |
210 | ||
211 | devc->acq_aborted = TRUE; | |
212 | ||
213 | for (i = devc->num_transfers - 1; i >= 0; i--) { | |
214 | if (devc->transfers[i]) | |
215 | libusb_cancel_transfer(devc->transfers[i]); | |
216 | } | |
217 | } | |
218 | ||
219 | static void finish_acquisition(struct sr_dev_inst *sdi) | |
220 | { | |
221 | struct dev_context *devc; | |
222 | ||
223 | devc = sdi->priv; | |
224 | ||
225 | std_session_send_df_end(sdi); | |
226 | ||
227 | usb_source_remove(sdi->session, devc->ctx); | |
228 | ||
229 | devc->num_transfers = 0; | |
230 | g_free(devc->transfers); | |
231 | } | |
232 | ||
233 | static void free_transfer(struct libusb_transfer *transfer) | |
234 | { | |
235 | struct sr_dev_inst *sdi; | |
236 | struct dev_context *devc; | |
237 | unsigned int i; | |
238 | ||
239 | sdi = transfer->user_data; | |
240 | devc = sdi->priv; | |
241 | ||
242 | g_free(transfer->buffer); | |
243 | transfer->buffer = NULL; | |
244 | libusb_free_transfer(transfer); | |
245 | ||
246 | for (i = 0; i < devc->num_transfers; i++) { | |
247 | if (devc->transfers[i] == transfer) { | |
248 | devc->transfers[i] = NULL; | |
249 | break; | |
250 | } | |
251 | } | |
252 | ||
253 | devc->submitted_transfers--; | |
254 | if (devc->submitted_transfers == 0) | |
255 | finish_acquisition(sdi); | |
256 | } | |
257 | ||
258 | static void resubmit_transfer(struct libusb_transfer *transfer) | |
259 | { | |
260 | int ret; | |
261 | ||
262 | if ((ret = libusb_submit_transfer(transfer)) == LIBUSB_SUCCESS) | |
263 | return; | |
264 | ||
265 | sr_err("%s: %s", __func__, libusb_error_name(ret)); | |
266 | free_transfer(transfer); | |
267 | ||
268 | } | |
269 | ||
270 | SR_PRIV void dslogic_send_data(struct sr_dev_inst *sdi, | |
271 | uint8_t *data, size_t length, size_t sample_width) | |
272 | { | |
273 | const struct sr_datafeed_logic logic = { | |
274 | .length = length, | |
275 | .unitsize = sample_width, | |
276 | .data = data | |
277 | }; | |
278 | ||
279 | const struct sr_datafeed_packet packet = { | |
280 | .type = SR_DF_LOGIC, | |
281 | .payload = &logic | |
282 | }; | |
283 | ||
284 | sr_session_send(sdi, &packet); | |
285 | } | |
286 | ||
287 | SR_PRIV void LIBUSB_CALL dslogic_receive_transfer(struct libusb_transfer *transfer) | |
288 | { | |
289 | struct sr_dev_inst *sdi; | |
290 | struct dev_context *devc; | |
291 | gboolean packet_has_error = FALSE; | |
292 | struct sr_datafeed_packet packet; | |
293 | unsigned int num_samples; | |
294 | int trigger_offset, cur_sample_count; | |
295 | const int unitsize = 2; | |
296 | ||
297 | sdi = transfer->user_data; | |
298 | devc = sdi->priv; | |
299 | ||
300 | /* | |
301 | * If acquisition has already ended, just free any queued up | |
302 | * transfer that come in. | |
303 | */ | |
304 | if (devc->acq_aborted) { | |
305 | free_transfer(transfer); | |
306 | return; | |
307 | } | |
308 | ||
309 | sr_dbg("receive_transfer(): status %s received %d bytes.", | |
310 | libusb_error_name(transfer->status), transfer->actual_length); | |
311 | ||
312 | /* Save incoming transfer before reusing the transfer struct. */ | |
313 | cur_sample_count = transfer->actual_length / unitsize; | |
314 | ||
315 | switch (transfer->status) { | |
316 | case LIBUSB_TRANSFER_NO_DEVICE: | |
317 | dslogic_abort_acquisition(devc); | |
318 | free_transfer(transfer); | |
319 | return; | |
320 | case LIBUSB_TRANSFER_COMPLETED: | |
321 | case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though. */ | |
322 | break; | |
323 | default: | |
324 | packet_has_error = TRUE; | |
325 | break; | |
326 | } | |
327 | ||
328 | if (transfer->actual_length == 0 || packet_has_error) { | |
329 | devc->empty_transfer_count++; | |
330 | if (devc->empty_transfer_count > MAX_EMPTY_TRANSFERS) { | |
331 | /* | |
332 | * The FX2 gave up. End the acquisition, the frontend | |
333 | * will work out that the samplecount is short. | |
334 | */ | |
335 | dslogic_abort_acquisition(devc); | |
336 | free_transfer(transfer); | |
337 | } else { | |
338 | resubmit_transfer(transfer); | |
339 | } | |
340 | return; | |
341 | } else { | |
342 | devc->empty_transfer_count = 0; | |
343 | } | |
344 | if (devc->trigger_fired) { | |
345 | if (!devc->limit_samples || devc->sent_samples < devc->limit_samples) { | |
346 | /* Send the incoming transfer to the session bus. */ | |
347 | if (devc->limit_samples && devc->sent_samples + cur_sample_count > devc->limit_samples) | |
348 | num_samples = devc->limit_samples - devc->sent_samples; | |
349 | else | |
350 | num_samples = cur_sample_count; | |
351 | ||
352 | if (devc->trigger_pos > devc->sent_samples | |
353 | && devc->trigger_pos <= devc->sent_samples + num_samples) { | |
354 | /* DSLogic trigger in this block. Send trigger position. */ | |
355 | trigger_offset = devc->trigger_pos - devc->sent_samples; | |
356 | /* Pre-trigger samples. */ | |
357 | dslogic_send_data(sdi, (uint8_t *)transfer->buffer, | |
358 | trigger_offset * unitsize, unitsize); | |
359 | devc->sent_samples += trigger_offset; | |
360 | /* Trigger position. */ | |
361 | devc->trigger_pos = 0; | |
362 | packet.type = SR_DF_TRIGGER; | |
363 | packet.payload = NULL; | |
364 | sr_session_send(sdi, &packet); | |
365 | /* Post trigger samples. */ | |
366 | num_samples -= trigger_offset; | |
367 | dslogic_send_data(sdi, (uint8_t *)transfer->buffer | |
368 | + trigger_offset * unitsize, num_samples * unitsize, unitsize); | |
369 | devc->sent_samples += num_samples; | |
370 | } else { | |
371 | dslogic_send_data(sdi, (uint8_t *)transfer->buffer, | |
372 | num_samples * unitsize, unitsize); | |
373 | devc->sent_samples += num_samples; | |
374 | } | |
375 | } | |
376 | } | |
377 | ||
378 | if (devc->limit_samples && devc->sent_samples >= devc->limit_samples) { | |
379 | dslogic_abort_acquisition(devc); | |
380 | free_transfer(transfer); | |
381 | } else | |
382 | resubmit_transfer(transfer); | |
383 | } | |
384 | ||
385 | static unsigned int to_bytes_per_ms(unsigned int samplerate) | |
386 | { | |
387 | return samplerate / 1000; | |
388 | } | |
389 | ||
390 | SR_PRIV size_t dslogic_get_buffer_size(struct dev_context *devc) | |
391 | { | |
392 | size_t s; | |
393 | ||
394 | /* | |
395 | * The buffer should be large enough to hold 10ms of data and | |
396 | * a multiple of 512. | |
397 | */ | |
398 | s = 10 * to_bytes_per_ms(devc->cur_samplerate); | |
399 | return (s + 511) & ~511; | |
400 | } | |
401 | ||
402 | SR_PRIV unsigned int dslogic_get_timeout(struct dev_context *devc) | |
403 | { | |
404 | size_t total_size; | |
405 | unsigned int timeout; | |
406 | ||
407 | total_size = dslogic_get_buffer_size(devc) * | |
408 | dslogic_get_number_of_transfers(devc); | |
409 | timeout = total_size / to_bytes_per_ms(devc->cur_samplerate); | |
410 | return timeout + timeout / 4; /* Leave a headroom of 25% percent. */ | |
411 | } |