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Commit | Line | Data |
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28a35d8a | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
28a35d8a | 3 | * |
868501fa | 4 | * Copyright (C) 2010-2012 Håvard Espeland <gus@ping.uio.no>, |
911f1834 UH |
5 | * Copyright (C) 2010 Martin Stensgård <mastensg@ping.uio.no> |
6 | * Copyright (C) 2010 Carl Henrik Lunde <chlunde@ping.uio.no> | |
28a35d8a HE |
7 | * |
8 | * This program is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation, either version 3 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
911f1834 | 22 | /* |
6352d030 | 23 | * ASIX SIGMA/SIGMA2 logic analyzer driver |
911f1834 UH |
24 | */ |
25 | ||
6ec6c43b | 26 | #include <config.h> |
3ba56876 | 27 | #include "protocol.h" |
28a35d8a | 28 | |
b1648dea MV |
29 | /* |
30 | * The ASIX Sigma supports arbitrary integer frequency divider in | |
31 | * the 50MHz mode. The divider is in range 1...256 , allowing for | |
32 | * very precise sampling rate selection. This driver supports only | |
33 | * a subset of the sampling rates. | |
34 | */ | |
3ba56876 | 35 | SR_PRIV const uint64_t samplerates[] = { |
b1648dea MV |
36 | SR_KHZ(200), /* div=250 */ |
37 | SR_KHZ(250), /* div=200 */ | |
38 | SR_KHZ(500), /* div=100 */ | |
39 | SR_MHZ(1), /* div=50 */ | |
40 | SR_MHZ(5), /* div=10 */ | |
41 | SR_MHZ(10), /* div=5 */ | |
42 | SR_MHZ(25), /* div=2 */ | |
43 | SR_MHZ(50), /* div=1 */ | |
44 | SR_MHZ(100), /* Special FW needed */ | |
45 | SR_MHZ(200), /* Special FW needed */ | |
28a35d8a HE |
46 | }; |
47 | ||
4154a516 | 48 | SR_PRIV const size_t samplerates_count = ARRAY_SIZE(samplerates); |
39c64c6a | 49 | |
8e2d6c9d | 50 | static const char sigma_firmware_files[][24] = { |
499b17e9 | 51 | /* 50 MHz, supports 8 bit fractions */ |
8e2d6c9d | 52 | "asix-sigma-50.fw", |
499b17e9 | 53 | /* 100 MHz */ |
8e2d6c9d | 54 | "asix-sigma-100.fw", |
499b17e9 | 55 | /* 200 MHz */ |
8e2d6c9d | 56 | "asix-sigma-200.fw", |
499b17e9 | 57 | /* Synchronous clock from pin */ |
8e2d6c9d | 58 | "asix-sigma-50sync.fw", |
499b17e9 | 59 | /* Frequency counter */ |
8e2d6c9d | 60 | "asix-sigma-phasor.fw", |
f6564c8d HE |
61 | }; |
62 | ||
0e1357e8 | 63 | static int sigma_read(void *buf, size_t size, struct dev_context *devc) |
28a35d8a HE |
64 | { |
65 | int ret; | |
fefa1800 | 66 | |
0e1357e8 | 67 | ret = ftdi_read_data(&devc->ftdic, (unsigned char *)buf, size); |
28a35d8a | 68 | if (ret < 0) { |
47f4f073 | 69 | sr_err("ftdi_read_data failed: %s", |
0e1357e8 | 70 | ftdi_get_error_string(&devc->ftdic)); |
28a35d8a HE |
71 | } |
72 | ||
73 | return ret; | |
74 | } | |
75 | ||
0e1357e8 | 76 | static int sigma_write(void *buf, size_t size, struct dev_context *devc) |
28a35d8a HE |
77 | { |
78 | int ret; | |
fefa1800 | 79 | |
0e1357e8 | 80 | ret = ftdi_write_data(&devc->ftdic, (unsigned char *)buf, size); |
28a35d8a | 81 | if (ret < 0) { |
47f4f073 | 82 | sr_err("ftdi_write_data failed: %s", |
0e1357e8 | 83 | ftdi_get_error_string(&devc->ftdic)); |
fefa1800 | 84 | } else if ((size_t) ret != size) { |
47f4f073 | 85 | sr_err("ftdi_write_data did not complete write."); |
28a35d8a HE |
86 | } |
87 | ||
88 | return ret; | |
89 | } | |
90 | ||
e8686e3a AG |
91 | /* |
92 | * NOTE: We chose the buffer size to be large enough to hold any write to the | |
93 | * device. We still print a message just in case. | |
94 | */ | |
3ba56876 | 95 | SR_PRIV int sigma_write_register(uint8_t reg, uint8_t *data, size_t len, |
96 | struct dev_context *devc) | |
28a35d8a HE |
97 | { |
98 | size_t i; | |
e8686e3a | 99 | uint8_t buf[80]; |
28a35d8a HE |
100 | int idx = 0; |
101 | ||
7c86d853 | 102 | if ((2 * len + 2) > sizeof(buf)) { |
e8686e3a | 103 | sr_err("Attempted to write %zu bytes, but buffer is too small.", |
7c86d853 | 104 | len); |
e8686e3a AG |
105 | return SR_ERR_BUG; |
106 | } | |
107 | ||
28a35d8a HE |
108 | buf[idx++] = REG_ADDR_LOW | (reg & 0xf); |
109 | buf[idx++] = REG_ADDR_HIGH | (reg >> 4); | |
110 | ||
0a1f7b09 | 111 | for (i = 0; i < len; i++) { |
28a35d8a HE |
112 | buf[idx++] = REG_DATA_LOW | (data[i] & 0xf); |
113 | buf[idx++] = REG_DATA_HIGH_WRITE | (data[i] >> 4); | |
114 | } | |
115 | ||
0e1357e8 | 116 | return sigma_write(buf, idx, devc); |
28a35d8a HE |
117 | } |
118 | ||
3ba56876 | 119 | SR_PRIV int sigma_set_register(uint8_t reg, uint8_t value, struct dev_context *devc) |
28a35d8a | 120 | { |
0e1357e8 | 121 | return sigma_write_register(reg, &value, 1, devc); |
28a35d8a HE |
122 | } |
123 | ||
99965709 | 124 | static int sigma_read_register(uint8_t reg, uint8_t *data, size_t len, |
0e1357e8 | 125 | struct dev_context *devc) |
28a35d8a HE |
126 | { |
127 | uint8_t buf[3]; | |
fefa1800 | 128 | |
28a35d8a HE |
129 | buf[0] = REG_ADDR_LOW | (reg & 0xf); |
130 | buf[1] = REG_ADDR_HIGH | (reg >> 4); | |
28a35d8a HE |
131 | buf[2] = REG_READ_ADDR; |
132 | ||
0e1357e8 | 133 | sigma_write(buf, sizeof(buf), devc); |
28a35d8a | 134 | |
0e1357e8 | 135 | return sigma_read(data, len, devc); |
28a35d8a HE |
136 | } |
137 | ||
0e1357e8 | 138 | static uint8_t sigma_get_register(uint8_t reg, struct dev_context *devc) |
28a35d8a HE |
139 | { |
140 | uint8_t value; | |
fefa1800 | 141 | |
0e1357e8 | 142 | if (1 != sigma_read_register(reg, &value, 1, devc)) { |
47f4f073 | 143 | sr_err("sigma_get_register: 1 byte expected"); |
28a35d8a HE |
144 | return 0; |
145 | } | |
146 | ||
147 | return value; | |
148 | } | |
149 | ||
99965709 | 150 | static int sigma_read_pos(uint32_t *stoppos, uint32_t *triggerpos, |
0e1357e8 | 151 | struct dev_context *devc) |
28a35d8a HE |
152 | { |
153 | uint8_t buf[] = { | |
154 | REG_ADDR_LOW | READ_TRIGGER_POS_LOW, | |
155 | ||
156 | REG_READ_ADDR | NEXT_REG, | |
157 | REG_READ_ADDR | NEXT_REG, | |
158 | REG_READ_ADDR | NEXT_REG, | |
159 | REG_READ_ADDR | NEXT_REG, | |
160 | REG_READ_ADDR | NEXT_REG, | |
161 | REG_READ_ADDR | NEXT_REG, | |
162 | }; | |
28a35d8a HE |
163 | uint8_t result[6]; |
164 | ||
0e1357e8 | 165 | sigma_write(buf, sizeof(buf), devc); |
28a35d8a | 166 | |
0e1357e8 | 167 | sigma_read(result, sizeof(result), devc); |
28a35d8a HE |
168 | |
169 | *triggerpos = result[0] | (result[1] << 8) | (result[2] << 16); | |
170 | *stoppos = result[3] | (result[4] << 8) | (result[5] << 16); | |
171 | ||
57bbf56b HE |
172 | /* Not really sure why this must be done, but according to spec. */ |
173 | if ((--*stoppos & 0x1ff) == 0x1ff) | |
382cb19f | 174 | *stoppos -= 64; |
57bbf56b HE |
175 | |
176 | if ((*--triggerpos & 0x1ff) == 0x1ff) | |
382cb19f | 177 | *triggerpos -= 64; |
57bbf56b | 178 | |
28a35d8a HE |
179 | return 1; |
180 | } | |
181 | ||
99965709 | 182 | static int sigma_read_dram(uint16_t startchunk, size_t numchunks, |
0e1357e8 | 183 | uint8_t *data, struct dev_context *devc) |
28a35d8a HE |
184 | { |
185 | size_t i; | |
186 | uint8_t buf[4096]; | |
187 | int idx = 0; | |
188 | ||
fefa1800 | 189 | /* Send the startchunk. Index start with 1. */ |
28a35d8a HE |
190 | buf[0] = startchunk >> 8; |
191 | buf[1] = startchunk & 0xff; | |
0e1357e8 | 192 | sigma_write_register(WRITE_MEMROW, buf, 2, devc); |
28a35d8a | 193 | |
fefa1800 | 194 | /* Read the DRAM. */ |
28a35d8a HE |
195 | buf[idx++] = REG_DRAM_BLOCK; |
196 | buf[idx++] = REG_DRAM_WAIT_ACK; | |
197 | ||
0a1f7b09 | 198 | for (i = 0; i < numchunks; i++) { |
fefa1800 UH |
199 | /* Alternate bit to copy from DRAM to cache. */ |
200 | if (i != (numchunks - 1)) | |
201 | buf[idx++] = REG_DRAM_BLOCK | (((i + 1) % 2) << 4); | |
28a35d8a HE |
202 | |
203 | buf[idx++] = REG_DRAM_BLOCK_DATA | ((i % 2) << 4); | |
204 | ||
fefa1800 | 205 | if (i != (numchunks - 1)) |
28a35d8a HE |
206 | buf[idx++] = REG_DRAM_WAIT_ACK; |
207 | } | |
208 | ||
0e1357e8 | 209 | sigma_write(buf, idx, devc); |
28a35d8a | 210 | |
0e1357e8 | 211 | return sigma_read(data, numchunks * CHUNK_SIZE, devc); |
28a35d8a HE |
212 | } |
213 | ||
4ae1f451 | 214 | /* Upload trigger look-up tables to Sigma. */ |
3ba56876 | 215 | SR_PRIV int sigma_write_trigger_lut(struct triggerlut *lut, struct dev_context *devc) |
ee492173 HE |
216 | { |
217 | int i; | |
218 | uint8_t tmp[2]; | |
219 | uint16_t bit; | |
220 | ||
221 | /* Transpose the table and send to Sigma. */ | |
0a1f7b09 | 222 | for (i = 0; i < 16; i++) { |
ee492173 HE |
223 | bit = 1 << i; |
224 | ||
225 | tmp[0] = tmp[1] = 0; | |
226 | ||
227 | if (lut->m2d[0] & bit) | |
228 | tmp[0] |= 0x01; | |
229 | if (lut->m2d[1] & bit) | |
230 | tmp[0] |= 0x02; | |
231 | if (lut->m2d[2] & bit) | |
232 | tmp[0] |= 0x04; | |
233 | if (lut->m2d[3] & bit) | |
234 | tmp[0] |= 0x08; | |
235 | ||
236 | if (lut->m3 & bit) | |
237 | tmp[0] |= 0x10; | |
238 | if (lut->m3s & bit) | |
239 | tmp[0] |= 0x20; | |
240 | if (lut->m4 & bit) | |
241 | tmp[0] |= 0x40; | |
242 | ||
243 | if (lut->m0d[0] & bit) | |
244 | tmp[1] |= 0x01; | |
245 | if (lut->m0d[1] & bit) | |
246 | tmp[1] |= 0x02; | |
247 | if (lut->m0d[2] & bit) | |
248 | tmp[1] |= 0x04; | |
249 | if (lut->m0d[3] & bit) | |
250 | tmp[1] |= 0x08; | |
251 | ||
252 | if (lut->m1d[0] & bit) | |
253 | tmp[1] |= 0x10; | |
254 | if (lut->m1d[1] & bit) | |
255 | tmp[1] |= 0x20; | |
256 | if (lut->m1d[2] & bit) | |
257 | tmp[1] |= 0x40; | |
258 | if (lut->m1d[3] & bit) | |
259 | tmp[1] |= 0x80; | |
260 | ||
99965709 | 261 | sigma_write_register(WRITE_TRIGGER_SELECT0, tmp, sizeof(tmp), |
0e1357e8 BV |
262 | devc); |
263 | sigma_set_register(WRITE_TRIGGER_SELECT1, 0x30 | i, devc); | |
ee492173 HE |
264 | } |
265 | ||
266 | /* Send the parameters */ | |
267 | sigma_write_register(WRITE_TRIGGER_SELECT0, (uint8_t *) &lut->params, | |
0e1357e8 | 268 | sizeof(lut->params), devc); |
ee492173 | 269 | |
e46b8fb1 | 270 | return SR_OK; |
ee492173 HE |
271 | } |
272 | ||
3ba56876 | 273 | SR_PRIV void sigma_clear_helper(void *priv) |
0448d110 | 274 | { |
0e1357e8 | 275 | struct dev_context *devc; |
ce4d26dd | 276 | |
3678cf73 | 277 | devc = priv; |
0e1357e8 | 278 | |
3678cf73 UH |
279 | ftdi_deinit(&devc->ftdic); |
280 | } | |
0448d110 | 281 | |
d5fa188a MV |
282 | /* |
283 | * Configure the FPGA for bitbang mode. | |
284 | * This sequence is documented in section 2. of the ASIX Sigma programming | |
285 | * manual. This sequence is necessary to configure the FPGA in the Sigma | |
286 | * into Bitbang mode, in which it can be programmed with the firmware. | |
287 | */ | |
288 | static int sigma_fpga_init_bitbang(struct dev_context *devc) | |
289 | { | |
290 | uint8_t suicide[] = { | |
291 | 0x84, 0x84, 0x88, 0x84, 0x88, 0x84, 0x88, 0x84, | |
292 | }; | |
293 | uint8_t init_array[] = { | |
294 | 0x01, 0x03, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, | |
295 | 0x01, 0x01, | |
296 | }; | |
1a46cc62 | 297 | int i, ret, timeout = (10 * 1000); |
d5fa188a MV |
298 | uint8_t data; |
299 | ||
300 | /* Section 2. part 1), do the FPGA suicide. */ | |
301 | sigma_write(suicide, sizeof(suicide), devc); | |
302 | sigma_write(suicide, sizeof(suicide), devc); | |
303 | sigma_write(suicide, sizeof(suicide), devc); | |
304 | sigma_write(suicide, sizeof(suicide), devc); | |
305 | ||
306 | /* Section 2. part 2), do pulse on D1. */ | |
307 | sigma_write(init_array, sizeof(init_array), devc); | |
308 | ftdi_usb_purge_buffers(&devc->ftdic); | |
309 | ||
310 | /* Wait until the FPGA asserts D6/INIT_B. */ | |
311 | for (i = 0; i < timeout; i++) { | |
312 | ret = sigma_read(&data, 1, devc); | |
313 | if (ret < 0) | |
314 | return ret; | |
315 | /* Test if pin D6 got asserted. */ | |
316 | if (data & (1 << 5)) | |
317 | return 0; | |
318 | /* The D6 was not asserted yet, wait a bit. */ | |
1a46cc62 | 319 | g_usleep(10 * 1000); |
d5fa188a MV |
320 | } |
321 | ||
322 | return SR_ERR_TIMEOUT; | |
323 | } | |
324 | ||
64fe661b MV |
325 | /* |
326 | * Configure the FPGA for logic-analyzer mode. | |
327 | */ | |
328 | static int sigma_fpga_init_la(struct dev_context *devc) | |
329 | { | |
330 | /* Initialize the logic analyzer mode. */ | |
331 | uint8_t logic_mode_start[] = { | |
011f1091 MV |
332 | REG_ADDR_LOW | (READ_ID & 0xf), |
333 | REG_ADDR_HIGH | (READ_ID >> 8), | |
334 | REG_READ_ADDR, /* Read ID register. */ | |
335 | ||
336 | REG_ADDR_LOW | (WRITE_TEST & 0xf), | |
337 | REG_DATA_LOW | 0x5, | |
338 | REG_DATA_HIGH_WRITE | 0x5, | |
339 | REG_READ_ADDR, /* Read scratch register. */ | |
340 | ||
341 | REG_DATA_LOW | 0xa, | |
342 | REG_DATA_HIGH_WRITE | 0xa, | |
343 | REG_READ_ADDR, /* Read scratch register. */ | |
344 | ||
345 | REG_ADDR_LOW | (WRITE_MODE & 0xf), | |
346 | REG_DATA_LOW | 0x0, | |
347 | REG_DATA_HIGH_WRITE | 0x8, | |
64fe661b MV |
348 | }; |
349 | ||
350 | uint8_t result[3]; | |
351 | int ret; | |
352 | ||
353 | /* Initialize the logic analyzer mode. */ | |
354 | sigma_write(logic_mode_start, sizeof(logic_mode_start), devc); | |
355 | ||
011f1091 | 356 | /* Expect a 3 byte reply since we issued three READ requests. */ |
64fe661b MV |
357 | ret = sigma_read(result, 3, devc); |
358 | if (ret != 3) | |
359 | goto err; | |
360 | ||
361 | if (result[0] != 0xa6 || result[1] != 0x55 || result[2] != 0xaa) | |
362 | goto err; | |
363 | ||
364 | return SR_OK; | |
365 | err: | |
366 | sr_err("Configuration failed. Invalid reply received."); | |
367 | return SR_ERR; | |
368 | } | |
369 | ||
a80226bb MV |
370 | /* |
371 | * Read the firmware from a file and transform it into a series of bitbang | |
372 | * pulses used to program the FPGA. Note that the *bb_cmd must be free()'d | |
373 | * by the caller of this function. | |
374 | */ | |
8e2d6c9d | 375 | static int sigma_fw_2_bitbang(struct sr_context *ctx, const char *name, |
a80226bb MV |
376 | uint8_t **bb_cmd, gsize *bb_cmd_size) |
377 | { | |
8e2d6c9d DE |
378 | size_t i, file_size, bb_size; |
379 | char *firmware; | |
a80226bb MV |
380 | uint8_t *bb_stream, *bbs; |
381 | uint32_t imm; | |
382 | int bit, v; | |
383 | int ret = SR_OK; | |
384 | ||
387825dc | 385 | /* Retrieve the on-disk firmware file content. */ |
8e2d6c9d DE |
386 | firmware = sr_resource_load(ctx, SR_RESOURCE_FIRMWARE, |
387 | name, &file_size, 256 * 1024); | |
388 | if (!firmware) | |
389 | return SR_ERR; | |
a80226bb | 390 | |
387825dc | 391 | /* Unscramble the file content (XOR with "random" sequence). */ |
a80226bb MV |
392 | imm = 0x3f6df2ab; |
393 | for (i = 0; i < file_size; i++) { | |
394 | imm = (imm + 0xa853753) % 177 + (imm * 0x8034052); | |
395 | firmware[i] ^= imm & 0xff; | |
396 | } | |
397 | ||
398 | /* | |
387825dc GS |
399 | * Generate a sequence of bitbang samples. With two samples per |
400 | * FPGA configuration bit, providing the level for the DIN signal | |
401 | * as well as two edges for CCLK. See Xilinx UG332 for details | |
402 | * ("slave serial" mode). | |
403 | * | |
404 | * Note that CCLK is inverted in hardware. That's why the | |
405 | * respective bit is first set and then cleared in the bitbang | |
406 | * sample sets. So that the DIN level will be stable when the | |
407 | * data gets sampled at the rising CCLK edge, and the signals' | |
408 | * setup time constraint will be met. | |
409 | * | |
410 | * The caller will put the FPGA into download mode, will send | |
411 | * the bitbang samples, and release the allocated memory. | |
a80226bb | 412 | */ |
a80226bb MV |
413 | bb_size = file_size * 8 * 2; |
414 | bb_stream = (uint8_t *)g_try_malloc(bb_size); | |
415 | if (!bb_stream) { | |
416 | sr_err("%s: Failed to allocate bitbang stream", __func__); | |
417 | ret = SR_ERR_MALLOC; | |
418 | goto exit; | |
419 | } | |
a80226bb MV |
420 | bbs = bb_stream; |
421 | for (i = 0; i < file_size; i++) { | |
422 | for (bit = 7; bit >= 0; bit--) { | |
423 | v = (firmware[i] & (1 << bit)) ? 0x40 : 0x00; | |
424 | *bbs++ = v | 0x01; | |
425 | *bbs++ = v; | |
426 | } | |
427 | } | |
428 | ||
429 | /* The transformation completed successfully, return the result. */ | |
430 | *bb_cmd = bb_stream; | |
431 | *bb_cmd_size = bb_size; | |
432 | ||
433 | exit: | |
8e2d6c9d | 434 | g_free(firmware); |
a80226bb MV |
435 | return ret; |
436 | } | |
437 | ||
8e2d6c9d DE |
438 | static int upload_firmware(struct sr_context *ctx, |
439 | int firmware_idx, struct dev_context *devc) | |
28a35d8a HE |
440 | { |
441 | int ret; | |
442 | unsigned char *buf; | |
443 | unsigned char pins; | |
444 | size_t buf_size; | |
499b17e9 | 445 | const char *firmware = sigma_firmware_files[firmware_idx]; |
8bbf7627 | 446 | struct ftdi_context *ftdic = &devc->ftdic; |
28a35d8a | 447 | |
fefa1800 | 448 | /* Make sure it's an ASIX SIGMA. */ |
8bbf7627 MV |
449 | ret = ftdi_usb_open_desc(ftdic, USB_VENDOR, USB_PRODUCT, |
450 | USB_DESCRIPTION, NULL); | |
451 | if (ret < 0) { | |
47f4f073 | 452 | sr_err("ftdi_usb_open failed: %s", |
8bbf7627 | 453 | ftdi_get_error_string(ftdic)); |
28a35d8a HE |
454 | return 0; |
455 | } | |
456 | ||
8bbf7627 MV |
457 | ret = ftdi_set_bitmode(ftdic, 0xdf, BITMODE_BITBANG); |
458 | if (ret < 0) { | |
47f4f073 | 459 | sr_err("ftdi_set_bitmode failed: %s", |
8bbf7627 | 460 | ftdi_get_error_string(ftdic)); |
28a35d8a HE |
461 | return 0; |
462 | } | |
463 | ||
fefa1800 | 464 | /* Four times the speed of sigmalogan - Works well. */ |
1a46cc62 | 465 | ret = ftdi_set_baudrate(ftdic, 750 * 1000); |
8bbf7627 | 466 | if (ret < 0) { |
47f4f073 | 467 | sr_err("ftdi_set_baudrate failed: %s", |
8bbf7627 | 468 | ftdi_get_error_string(ftdic)); |
28a35d8a HE |
469 | return 0; |
470 | } | |
471 | ||
d5fa188a MV |
472 | /* Initialize the FPGA for firmware upload. */ |
473 | ret = sigma_fpga_init_bitbang(devc); | |
474 | if (ret) | |
475 | return ret; | |
28a35d8a | 476 | |
9ddb2a12 | 477 | /* Prepare firmware. */ |
8e2d6c9d | 478 | ret = sigma_fw_2_bitbang(ctx, firmware, &buf, &buf_size); |
8bbf7627 | 479 | if (ret != SR_OK) { |
f3f19d11 | 480 | sr_err("An error occurred while reading the firmware: %s", |
499b17e9 | 481 | firmware); |
b53738ba | 482 | return ret; |
28a35d8a HE |
483 | } |
484 | ||
f3f19d11 | 485 | /* Upload firmware. */ |
499b17e9 | 486 | sr_info("Uploading firmware file '%s'.", firmware); |
0e1357e8 | 487 | sigma_write(buf, buf_size, devc); |
28a35d8a HE |
488 | |
489 | g_free(buf); | |
490 | ||
8bbf7627 MV |
491 | ret = ftdi_set_bitmode(ftdic, 0x00, BITMODE_RESET); |
492 | if (ret < 0) { | |
47f4f073 | 493 | sr_err("ftdi_set_bitmode failed: %s", |
8bbf7627 | 494 | ftdi_get_error_string(ftdic)); |
e46b8fb1 | 495 | return SR_ERR; |
28a35d8a HE |
496 | } |
497 | ||
8bbf7627 | 498 | ftdi_usb_purge_buffers(ftdic); |
28a35d8a | 499 | |
fefa1800 | 500 | /* Discard garbage. */ |
29b66a2e | 501 | while (sigma_read(&pins, 1, devc) == 1) |
28a35d8a HE |
502 | ; |
503 | ||
64fe661b MV |
504 | /* Initialize the FPGA for logic-analyzer mode. */ |
505 | ret = sigma_fpga_init_la(devc); | |
506 | if (ret != SR_OK) | |
507 | return ret; | |
28a35d8a | 508 | |
0e1357e8 | 509 | devc->cur_firmware = firmware_idx; |
f6564c8d | 510 | |
47f4f073 | 511 | sr_info("Firmware uploaded."); |
e3fff420 | 512 | |
e46b8fb1 | 513 | return SR_OK; |
f6564c8d HE |
514 | } |
515 | ||
9a0a606a GS |
516 | /* |
517 | * Sigma doesn't support limiting the number of samples, so we have to | |
518 | * translate the number and the samplerate to an elapsed time. | |
519 | * | |
520 | * In addition we need to ensure that the last data cluster has passed | |
521 | * the hardware pipeline, and became available to the PC side. With RLE | |
522 | * compression up to 327ms could pass before another cluster accumulates | |
523 | * at 200kHz samplerate when input pins don't change. | |
524 | */ | |
525 | SR_PRIV uint64_t sigma_limit_samples_to_msec(const struct dev_context *devc, | |
526 | uint64_t limit_samples) | |
527 | { | |
528 | uint64_t limit_msec; | |
529 | uint64_t worst_cluster_time_ms; | |
530 | ||
531 | limit_msec = limit_samples * 1000 / devc->cur_samplerate; | |
532 | worst_cluster_time_ms = 65536 * 1000 / devc->cur_samplerate; | |
533 | /* | |
534 | * One cluster time is not enough to flush pipeline when sampling | |
535 | * grounded pins with 1 sample limit at 200kHz. Hence the 2* fix. | |
536 | */ | |
537 | return limit_msec + 2 * worst_cluster_time_ms; | |
538 | } | |
539 | ||
3ba56876 | 540 | SR_PRIV int sigma_set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate) |
f6564c8d | 541 | { |
2c9c0df8 | 542 | struct dev_context *devc; |
8e2d6c9d | 543 | struct drv_context *drvc; |
4154a516 | 544 | size_t i; |
2c9c0df8 | 545 | int ret; |
f6564c8d | 546 | |
2c9c0df8 | 547 | devc = sdi->priv; |
8e2d6c9d | 548 | drvc = sdi->driver->context; |
f4abaa9f UH |
549 | ret = SR_OK; |
550 | ||
2f7e529c | 551 | /* Reject rates that are not in the list of supported rates. */ |
4154a516 | 552 | for (i = 0; i < samplerates_count; i++) { |
2c9c0df8 | 553 | if (samplerates[i] == samplerate) |
f6564c8d HE |
554 | break; |
555 | } | |
4154a516 | 556 | if (i >= samplerates_count || samplerates[i] == 0) |
e46b8fb1 | 557 | return SR_ERR_SAMPLERATE; |
f6564c8d | 558 | |
2f7e529c GS |
559 | /* |
560 | * Depending on the samplerates of 200/100/50- MHz, specific | |
561 | * firmware is required and higher rates might limit the set | |
562 | * of available channels. | |
563 | */ | |
59df0c77 | 564 | if (samplerate <= SR_MHZ(50)) { |
8e2d6c9d | 565 | ret = upload_firmware(drvc->sr_ctx, 0, devc); |
ba7dd8bb | 566 | devc->num_channels = 16; |
6b2d3385 | 567 | } else if (samplerate == SR_MHZ(100)) { |
8e2d6c9d | 568 | ret = upload_firmware(drvc->sr_ctx, 1, devc); |
ba7dd8bb | 569 | devc->num_channels = 8; |
6b2d3385 | 570 | } else if (samplerate == SR_MHZ(200)) { |
8e2d6c9d | 571 | ret = upload_firmware(drvc->sr_ctx, 2, devc); |
ba7dd8bb | 572 | devc->num_channels = 4; |
f78898e9 | 573 | } |
f6564c8d | 574 | |
2f7e529c GS |
575 | /* |
576 | * Derive the sample period from the sample rate as well as the | |
577 | * number of samples that the device will communicate within | |
578 | * an "event" (memory organization internal to the device). | |
579 | */ | |
6b2d3385 BV |
580 | if (ret == SR_OK) { |
581 | devc->cur_samplerate = samplerate; | |
582 | devc->period_ps = 1000000000000ULL / samplerate; | |
583 | devc->samples_per_event = 16 / devc->num_channels; | |
584 | devc->state.state = SIGMA_IDLE; | |
585 | } | |
f6564c8d | 586 | |
2f7e529c GS |
587 | /* |
588 | * Support for "limit_samples" is implemented by stopping | |
589 | * acquisition after a corresponding period of time. | |
590 | * Re-calculate that period of time, in case the limit is | |
591 | * set first and the samplerate gets (re-)configured later. | |
592 | */ | |
593 | if (ret == SR_OK && devc->limit_samples) { | |
594 | uint64_t msecs; | |
9a0a606a | 595 | msecs = sigma_limit_samples_to_msec(devc, devc->limit_samples); |
2f7e529c GS |
596 | devc->limit_msec = msecs; |
597 | } | |
598 | ||
e8397563 | 599 | return ret; |
28a35d8a HE |
600 | } |
601 | ||
c53d793f HE |
602 | /* |
603 | * In 100 and 200 MHz mode, only a single pin rising/falling can be | |
604 | * set as trigger. In other modes, two rising/falling triggers can be set, | |
ba7dd8bb | 605 | * in addition to value/mask trigger for any number of channels. |
c53d793f HE |
606 | * |
607 | * The Sigma supports complex triggers using boolean expressions, but this | |
608 | * has not been implemented yet. | |
609 | */ | |
3ba56876 | 610 | SR_PRIV int sigma_convert_trigger(const struct sr_dev_inst *sdi) |
57bbf56b | 611 | { |
39c64c6a BV |
612 | struct dev_context *devc; |
613 | struct sr_trigger *trigger; | |
614 | struct sr_trigger_stage *stage; | |
615 | struct sr_trigger_match *match; | |
616 | const GSList *l, *m; | |
617 | int channelbit, trigger_set; | |
57bbf56b | 618 | |
39c64c6a | 619 | devc = sdi->priv; |
0e1357e8 | 620 | memset(&devc->trigger, 0, sizeof(struct sigma_trigger)); |
0812c40e | 621 | if (!(trigger = sr_session_trigger_get(sdi->session))) |
39c64c6a BV |
622 | return SR_OK; |
623 | ||
624 | trigger_set = 0; | |
625 | for (l = trigger->stages; l; l = l->next) { | |
626 | stage = l->data; | |
627 | for (m = stage->matches; m; m = m->next) { | |
628 | match = m->data; | |
629 | if (!match->channel->enabled) | |
630 | /* Ignore disabled channels with a trigger. */ | |
631 | continue; | |
632 | channelbit = 1 << (match->channel->index); | |
633 | if (devc->cur_samplerate >= SR_MHZ(100)) { | |
634 | /* Fast trigger support. */ | |
635 | if (trigger_set) { | |
636 | sr_err("Only a single pin trigger is " | |
637 | "supported in 100 and 200MHz mode."); | |
638 | return SR_ERR; | |
639 | } | |
640 | if (match->match == SR_TRIGGER_FALLING) | |
641 | devc->trigger.fallingmask |= channelbit; | |
642 | else if (match->match == SR_TRIGGER_RISING) | |
643 | devc->trigger.risingmask |= channelbit; | |
644 | else { | |
645 | sr_err("Only rising/falling trigger is " | |
646 | "supported in 100 and 200MHz mode."); | |
647 | return SR_ERR; | |
648 | } | |
eec5275e | 649 | |
0a1f7b09 | 650 | trigger_set++; |
39c64c6a BV |
651 | } else { |
652 | /* Simple trigger support (event). */ | |
653 | if (match->match == SR_TRIGGER_ONE) { | |
654 | devc->trigger.simplevalue |= channelbit; | |
655 | devc->trigger.simplemask |= channelbit; | |
656 | } | |
657 | else if (match->match == SR_TRIGGER_ZERO) { | |
658 | devc->trigger.simplevalue &= ~channelbit; | |
659 | devc->trigger.simplemask |= channelbit; | |
660 | } | |
661 | else if (match->match == SR_TRIGGER_FALLING) { | |
662 | devc->trigger.fallingmask |= channelbit; | |
0a1f7b09 | 663 | trigger_set++; |
39c64c6a BV |
664 | } |
665 | else if (match->match == SR_TRIGGER_RISING) { | |
666 | devc->trigger.risingmask |= channelbit; | |
0a1f7b09 | 667 | trigger_set++; |
39c64c6a BV |
668 | } |
669 | ||
670 | /* | |
671 | * Actually, Sigma supports 2 rising/falling triggers, | |
672 | * but they are ORed and the current trigger syntax | |
673 | * does not permit ORed triggers. | |
674 | */ | |
675 | if (trigger_set > 1) { | |
676 | sr_err("Only 1 rising/falling trigger " | |
677 | "is supported."); | |
678 | return SR_ERR; | |
679 | } | |
ee492173 | 680 | } |
ee492173 | 681 | } |
57bbf56b HE |
682 | } |
683 | ||
e46b8fb1 | 684 | return SR_OK; |
57bbf56b HE |
685 | } |
686 | ||
a1c743fc | 687 | |
36b1c8e6 | 688 | /* Software trigger to determine exact trigger position. */ |
5fc01191 | 689 | static int get_trigger_offset(uint8_t *samples, uint16_t last_sample, |
36b1c8e6 HE |
690 | struct sigma_trigger *t) |
691 | { | |
692 | int i; | |
5fc01191 | 693 | uint16_t sample = 0; |
36b1c8e6 | 694 | |
0a1f7b09 | 695 | for (i = 0; i < 8; i++) { |
36b1c8e6 | 696 | if (i > 0) |
5fc01191 MV |
697 | last_sample = sample; |
698 | sample = samples[2 * i] | (samples[2 * i + 1] << 8); | |
36b1c8e6 HE |
699 | |
700 | /* Simple triggers. */ | |
5fc01191 | 701 | if ((sample & t->simplemask) != t->simplevalue) |
36b1c8e6 HE |
702 | continue; |
703 | ||
704 | /* Rising edge. */ | |
5fc01191 MV |
705 | if (((last_sample & t->risingmask) != 0) || |
706 | ((sample & t->risingmask) != t->risingmask)) | |
36b1c8e6 HE |
707 | continue; |
708 | ||
709 | /* Falling edge. */ | |
bdfc7a89 | 710 | if ((last_sample & t->fallingmask) != t->fallingmask || |
5fc01191 | 711 | (sample & t->fallingmask) != 0) |
36b1c8e6 HE |
712 | continue; |
713 | ||
714 | break; | |
715 | } | |
716 | ||
717 | /* If we did not match, return original trigger pos. */ | |
718 | return i & 0x7; | |
719 | } | |
720 | ||
3513d965 MV |
721 | /* |
722 | * Return the timestamp of "DRAM cluster". | |
723 | */ | |
724 | static uint16_t sigma_dram_cluster_ts(struct sigma_dram_cluster *cluster) | |
725 | { | |
726 | return (cluster->timestamp_hi << 8) | cluster->timestamp_lo; | |
727 | } | |
728 | ||
23239b5c MV |
729 | static void sigma_decode_dram_cluster(struct sigma_dram_cluster *dram_cluster, |
730 | unsigned int events_in_cluster, | |
1e23158b | 731 | unsigned int triggered, |
23239b5c MV |
732 | struct sr_dev_inst *sdi) |
733 | { | |
734 | struct dev_context *devc = sdi->priv; | |
735 | struct sigma_state *ss = &devc->state; | |
736 | struct sr_datafeed_packet packet; | |
737 | struct sr_datafeed_logic logic; | |
738 | uint16_t tsdiff, ts; | |
739 | uint8_t samples[2048]; | |
740 | unsigned int i; | |
741 | ||
23239b5c MV |
742 | ts = sigma_dram_cluster_ts(dram_cluster); |
743 | tsdiff = ts - ss->lastts; | |
a44b3b3f | 744 | ss->lastts = ts + EVENTS_PER_CLUSTER; |
23239b5c MV |
745 | |
746 | packet.type = SR_DF_LOGIC; | |
747 | packet.payload = &logic; | |
748 | logic.unitsize = 2; | |
749 | logic.data = samples; | |
750 | ||
751 | /* | |
752 | * First of all, send Sigrok a copy of the last sample from | |
753 | * previous cluster as many times as needed to make up for | |
754 | * the differential characteristics of data we get from the | |
755 | * Sigma. Sigrok needs one sample of data per period. | |
756 | * | |
757 | * One DRAM cluster contains a timestamp and seven samples, | |
758 | * the units of timestamp are "devc->period_ps" , the first | |
759 | * sample in the cluster happens at the time of the timestamp | |
760 | * and the remaining samples happen at timestamp +1...+6 . | |
761 | */ | |
a44b3b3f | 762 | for (ts = 0; ts < tsdiff; ts++) { |
23239b5c MV |
763 | i = ts % 1024; |
764 | samples[2 * i + 0] = ss->lastsample & 0xff; | |
765 | samples[2 * i + 1] = ss->lastsample >> 8; | |
766 | ||
767 | /* | |
768 | * If we have 1024 samples ready or we're at the | |
769 | * end of submitting the padding samples, submit | |
770 | * the packet to Sigrok. | |
771 | */ | |
a44b3b3f | 772 | if ((i == 1023) || (ts == tsdiff - 1)) { |
23239b5c | 773 | logic.length = (i + 1) * logic.unitsize; |
102f1239 | 774 | sr_session_send(sdi, &packet); |
23239b5c MV |
775 | } |
776 | } | |
777 | ||
778 | /* | |
779 | * Parse the samples in current cluster and prepare them | |
780 | * to be submitted to Sigrok. | |
781 | */ | |
782 | for (i = 0; i < events_in_cluster; i++) { | |
783 | samples[2 * i + 1] = dram_cluster->samples[i].sample_lo; | |
784 | samples[2 * i + 0] = dram_cluster->samples[i].sample_hi; | |
785 | } | |
786 | ||
787 | /* Send data up to trigger point (if triggered). */ | |
788 | int trigger_offset = 0; | |
1e23158b | 789 | if (triggered) { |
23239b5c MV |
790 | /* |
791 | * Trigger is not always accurate to sample because of | |
792 | * pipeline delay. However, it always triggers before | |
793 | * the actual event. We therefore look at the next | |
794 | * samples to pinpoint the exact position of the trigger. | |
795 | */ | |
796 | trigger_offset = get_trigger_offset(samples, | |
797 | ss->lastsample, &devc->trigger); | |
798 | ||
799 | if (trigger_offset > 0) { | |
800 | packet.type = SR_DF_LOGIC; | |
801 | logic.length = trigger_offset * logic.unitsize; | |
102f1239 | 802 | sr_session_send(sdi, &packet); |
23239b5c MV |
803 | events_in_cluster -= trigger_offset; |
804 | } | |
805 | ||
806 | /* Only send trigger if explicitly enabled. */ | |
807 | if (devc->use_triggers) { | |
808 | packet.type = SR_DF_TRIGGER; | |
102f1239 | 809 | sr_session_send(sdi, &packet); |
23239b5c MV |
810 | } |
811 | } | |
812 | ||
813 | if (events_in_cluster > 0) { | |
814 | packet.type = SR_DF_LOGIC; | |
815 | logic.length = events_in_cluster * logic.unitsize; | |
816 | logic.data = samples + (trigger_offset * logic.unitsize); | |
102f1239 | 817 | sr_session_send(sdi, &packet); |
23239b5c MV |
818 | } |
819 | ||
820 | ss->lastsample = | |
821 | samples[2 * (events_in_cluster - 1) + 0] | | |
822 | (samples[2 * (events_in_cluster - 1) + 1] << 8); | |
823 | ||
824 | } | |
825 | ||
28a35d8a | 826 | /* |
fefa1800 UH |
827 | * Decode chunk of 1024 bytes, 64 clusters, 7 events per cluster. |
828 | * Each event is 20ns apart, and can contain multiple samples. | |
f78898e9 HE |
829 | * |
830 | * For 200 MHz, events contain 4 samples for each channel, spread 5 ns apart. | |
831 | * For 100 MHz, events contain 2 samples for each channel, spread 10 ns apart. | |
832 | * For 50 MHz and below, events contain one sample for each channel, | |
833 | * spread 20 ns apart. | |
28a35d8a | 834 | */ |
1e23158b MV |
835 | static int decode_chunk_ts(struct sigma_dram_line *dram_line, |
836 | uint16_t events_in_line, | |
837 | uint32_t trigger_event, | |
102f1239 | 838 | struct sr_dev_inst *sdi) |
28a35d8a | 839 | { |
3628074d | 840 | struct sigma_dram_cluster *dram_cluster; |
0e1357e8 | 841 | struct dev_context *devc = sdi->priv; |
5fc01191 MV |
842 | unsigned int clusters_in_line = |
843 | (events_in_line + (EVENTS_PER_CLUSTER - 1)) / EVENTS_PER_CLUSTER; | |
844 | unsigned int events_in_cluster; | |
23239b5c | 845 | unsigned int i; |
1e23158b | 846 | uint32_t trigger_cluster = ~0, triggered = 0; |
ee492173 | 847 | |
4ae1f451 | 848 | /* Check if trigger is in this chunk. */ |
1e23158b MV |
849 | if (trigger_event < (64 * 7)) { |
850 | if (devc->cur_samplerate <= SR_MHZ(50)) { | |
851 | trigger_event -= MIN(EVENTS_PER_CLUSTER - 1, | |
852 | trigger_event); | |
853 | } | |
57bbf56b | 854 | |
f3f19d11 | 855 | /* Find in which cluster the trigger occurred. */ |
1e23158b | 856 | trigger_cluster = trigger_event / EVENTS_PER_CLUSTER; |
ee492173 | 857 | } |
28a35d8a | 858 | |
5fc01191 MV |
859 | /* For each full DRAM cluster. */ |
860 | for (i = 0; i < clusters_in_line; i++) { | |
3628074d | 861 | dram_cluster = &dram_line->cluster[i]; |
5fc01191 | 862 | |
5fc01191 | 863 | /* The last cluster might not be full. */ |
23239b5c MV |
864 | if ((i == clusters_in_line - 1) && |
865 | (events_in_line % EVENTS_PER_CLUSTER)) { | |
5fc01191 | 866 | events_in_cluster = events_in_line % EVENTS_PER_CLUSTER; |
23239b5c | 867 | } else { |
5fc01191 | 868 | events_in_cluster = EVENTS_PER_CLUSTER; |
abda62ce | 869 | } |
ee492173 | 870 | |
1e23158b MV |
871 | triggered = (i == trigger_cluster); |
872 | sigma_decode_dram_cluster(dram_cluster, events_in_cluster, | |
873 | triggered, sdi); | |
28a35d8a HE |
874 | } |
875 | ||
e46b8fb1 | 876 | return SR_OK; |
28a35d8a HE |
877 | } |
878 | ||
6057d9fa | 879 | static int download_capture(struct sr_dev_inst *sdi) |
28a35d8a | 880 | { |
6057d9fa | 881 | struct dev_context *devc = sdi->priv; |
e15e5873 | 882 | const uint32_t chunks_per_read = 32; |
fd830beb | 883 | struct sigma_dram_line *dram_line; |
c6648b66 | 884 | int bufsz; |
462fe786 | 885 | uint32_t stoppos, triggerpos; |
6057d9fa MV |
886 | uint8_t modestatus; |
887 | ||
c6648b66 MV |
888 | uint32_t i; |
889 | uint32_t dl_lines_total, dl_lines_curr, dl_lines_done; | |
46641fac | 890 | uint32_t dl_events_in_line = 64 * 7; |
1e23158b | 891 | uint32_t trg_line = ~0, trg_event = ~0; |
c6648b66 | 892 | |
fd830beb MV |
893 | dram_line = g_try_malloc0(chunks_per_read * sizeof(*dram_line)); |
894 | if (!dram_line) | |
895 | return FALSE; | |
896 | ||
6868626b BV |
897 | sr_info("Downloading sample data."); |
898 | ||
6057d9fa MV |
899 | /* Stop acquisition. */ |
900 | sigma_set_register(WRITE_MODE, 0x11, devc); | |
901 | ||
902 | /* Set SDRAM Read Enable. */ | |
903 | sigma_set_register(WRITE_MODE, 0x02, devc); | |
904 | ||
905 | /* Get the current position. */ | |
462fe786 | 906 | sigma_read_pos(&stoppos, &triggerpos, devc); |
6057d9fa MV |
907 | |
908 | /* Check if trigger has fired. */ | |
909 | modestatus = sigma_get_register(READ_MODE, devc); | |
1e23158b | 910 | if (modestatus & 0x20) { |
c6648b66 | 911 | trg_line = triggerpos >> 9; |
1e23158b MV |
912 | trg_event = triggerpos & 0x1ff; |
913 | } | |
6057d9fa | 914 | |
c6648b66 MV |
915 | /* |
916 | * Determine how many 1024b "DRAM lines" do we need to read from the | |
917 | * Sigma so we have a complete set of samples. Note that the last | |
918 | * line can be only partial, containing less than 64 clusters. | |
919 | */ | |
920 | dl_lines_total = (stoppos >> 9) + 1; | |
6868626b | 921 | |
c6648b66 | 922 | dl_lines_done = 0; |
6868626b | 923 | |
c6648b66 MV |
924 | while (dl_lines_total > dl_lines_done) { |
925 | /* We can download only up-to 32 DRAM lines in one go! */ | |
926 | dl_lines_curr = MIN(chunks_per_read, dl_lines_total); | |
6868626b | 927 | |
f41a4cae MV |
928 | bufsz = sigma_read_dram(dl_lines_done, dl_lines_curr, |
929 | (uint8_t *)dram_line, devc); | |
c6648b66 MV |
930 | /* TODO: Check bufsz. For now, just avoid compiler warnings. */ |
931 | (void)bufsz; | |
6868626b | 932 | |
c6648b66 MV |
933 | /* This is the first DRAM line, so find the initial timestamp. */ |
934 | if (dl_lines_done == 0) { | |
3513d965 MV |
935 | devc->state.lastts = |
936 | sigma_dram_cluster_ts(&dram_line[0].cluster[0]); | |
c6648b66 | 937 | devc->state.lastsample = 0; |
6868626b BV |
938 | } |
939 | ||
c6648b66 | 940 | for (i = 0; i < dl_lines_curr; i++) { |
1e23158b | 941 | uint32_t trigger_event = ~0; |
c6648b66 MV |
942 | /* The last "DRAM line" can be only partially full. */ |
943 | if (dl_lines_done + i == dl_lines_total - 1) | |
46641fac | 944 | dl_events_in_line = stoppos & 0x1ff; |
c6648b66 | 945 | |
e69ad48e | 946 | /* Test if the trigger happened on this line. */ |
c6648b66 | 947 | if (dl_lines_done + i == trg_line) |
1e23158b | 948 | trigger_event = trg_event; |
e69ad48e | 949 | |
1e23158b MV |
950 | decode_chunk_ts(dram_line + i, dl_events_in_line, |
951 | trigger_event, sdi); | |
c6648b66 | 952 | } |
6868626b | 953 | |
c6648b66 | 954 | dl_lines_done += dl_lines_curr; |
6868626b BV |
955 | } |
956 | ||
bee2b016 | 957 | std_session_send_df_end(sdi); |
6057d9fa | 958 | |
695dc859 | 959 | sdi->driver->dev_acquisition_stop(sdi); |
6057d9fa | 960 | |
fd830beb MV |
961 | g_free(dram_line); |
962 | ||
6057d9fa | 963 | return TRUE; |
6868626b BV |
964 | } |
965 | ||
d4051930 MV |
966 | /* |
967 | * Handle the Sigma when in CAPTURE mode. This function checks: | |
968 | * - Sampling time ended | |
969 | * - DRAM capacity overflow | |
970 | * This function triggers download of the samples from Sigma | |
971 | * in case either of the above conditions is true. | |
972 | */ | |
973 | static int sigma_capture_mode(struct sr_dev_inst *sdi) | |
6868626b | 974 | { |
d4051930 MV |
975 | struct dev_context *devc = sdi->priv; |
976 | ||
94ba4bd6 | 977 | uint64_t running_msec; |
28a35d8a | 978 | struct timeval tv; |
28a35d8a | 979 | |
00c86508 | 980 | uint32_t stoppos, triggerpos; |
28a35d8a | 981 | |
00c86508 | 982 | /* Check if the selected sampling duration passed. */ |
d4051930 MV |
983 | gettimeofday(&tv, 0); |
984 | running_msec = (tv.tv_sec - devc->start_tv.tv_sec) * 1000 + | |
00c86508 MV |
985 | (tv.tv_usec - devc->start_tv.tv_usec) / 1000; |
986 | if (running_msec >= devc->limit_msec) | |
6057d9fa | 987 | return download_capture(sdi); |
00c86508 MV |
988 | |
989 | /* Get the position in DRAM to which the FPGA is writing now. */ | |
990 | sigma_read_pos(&stoppos, &triggerpos, devc); | |
991 | /* Test if DRAM is full and if so, download the data. */ | |
992 | if ((stoppos >> 9) == 32767) | |
6057d9fa | 993 | return download_capture(sdi); |
28a35d8a | 994 | |
d4051930 MV |
995 | return TRUE; |
996 | } | |
28a35d8a | 997 | |
3ba56876 | 998 | SR_PRIV int sigma_receive_data(int fd, int revents, void *cb_data) |
d4051930 MV |
999 | { |
1000 | struct sr_dev_inst *sdi; | |
1001 | struct dev_context *devc; | |
88c51afe | 1002 | |
d4051930 MV |
1003 | (void)fd; |
1004 | (void)revents; | |
88c51afe | 1005 | |
d4051930 MV |
1006 | sdi = cb_data; |
1007 | devc = sdi->priv; | |
1008 | ||
1009 | if (devc->state.state == SIGMA_IDLE) | |
1010 | return TRUE; | |
1011 | ||
1012 | if (devc->state.state == SIGMA_CAPTURE) | |
1013 | return sigma_capture_mode(sdi); | |
28a35d8a | 1014 | |
28a35d8a HE |
1015 | return TRUE; |
1016 | } | |
1017 | ||
c53d793f HE |
1018 | /* Build a LUT entry used by the trigger functions. */ |
1019 | static void build_lut_entry(uint16_t value, uint16_t mask, uint16_t *entry) | |
ee492173 HE |
1020 | { |
1021 | int i, j, k, bit; | |
1022 | ||
ba7dd8bb | 1023 | /* For each quad channel. */ |
0a1f7b09 | 1024 | for (i = 0; i < 4; i++) { |
c53d793f | 1025 | entry[i] = 0xffff; |
ee492173 | 1026 | |
f758d074 | 1027 | /* For each bit in LUT. */ |
0a1f7b09 | 1028 | for (j = 0; j < 16; j++) |
ee492173 | 1029 | |
ba7dd8bb | 1030 | /* For each channel in quad. */ |
0a1f7b09 | 1031 | for (k = 0; k < 4; k++) { |
ee492173 HE |
1032 | bit = 1 << (i * 4 + k); |
1033 | ||
c53d793f | 1034 | /* Set bit in entry */ |
0a1f7b09 UH |
1035 | if ((mask & bit) && ((!(value & bit)) != |
1036 | (!(j & (1 << k))))) | |
c53d793f | 1037 | entry[i] &= ~(1 << j); |
ee492173 HE |
1038 | } |
1039 | } | |
c53d793f | 1040 | } |
ee492173 | 1041 | |
c53d793f HE |
1042 | /* Add a logical function to LUT mask. */ |
1043 | static void add_trigger_function(enum triggerop oper, enum triggerfunc func, | |
1044 | int index, int neg, uint16_t *mask) | |
1045 | { | |
1046 | int i, j; | |
1047 | int x[2][2], tmp, a, b, aset, bset, rset; | |
1048 | ||
1049 | memset(x, 0, 4 * sizeof(int)); | |
1050 | ||
1051 | /* Trigger detect condition. */ | |
1052 | switch (oper) { | |
1053 | case OP_LEVEL: | |
1054 | x[0][1] = 1; | |
1055 | x[1][1] = 1; | |
1056 | break; | |
1057 | case OP_NOT: | |
1058 | x[0][0] = 1; | |
1059 | x[1][0] = 1; | |
1060 | break; | |
1061 | case OP_RISE: | |
1062 | x[0][1] = 1; | |
1063 | break; | |
1064 | case OP_FALL: | |
1065 | x[1][0] = 1; | |
1066 | break; | |
1067 | case OP_RISEFALL: | |
1068 | x[0][1] = 1; | |
1069 | x[1][0] = 1; | |
1070 | break; | |
1071 | case OP_NOTRISE: | |
1072 | x[1][1] = 1; | |
1073 | x[0][0] = 1; | |
1074 | x[1][0] = 1; | |
1075 | break; | |
1076 | case OP_NOTFALL: | |
1077 | x[1][1] = 1; | |
1078 | x[0][0] = 1; | |
1079 | x[0][1] = 1; | |
1080 | break; | |
1081 | case OP_NOTRISEFALL: | |
1082 | x[1][1] = 1; | |
1083 | x[0][0] = 1; | |
1084 | break; | |
1085 | } | |
1086 | ||
1087 | /* Transpose if neg is set. */ | |
1088 | if (neg) { | |
0a1f7b09 UH |
1089 | for (i = 0; i < 2; i++) { |
1090 | for (j = 0; j < 2; j++) { | |
c53d793f | 1091 | tmp = x[i][j]; |
0a1f7b09 UH |
1092 | x[i][j] = x[1 - i][1 - j]; |
1093 | x[1 - i][1 - j] = tmp; | |
c53d793f | 1094 | } |
ea9cfed7 | 1095 | } |
c53d793f HE |
1096 | } |
1097 | ||
1098 | /* Update mask with function. */ | |
0a1f7b09 | 1099 | for (i = 0; i < 16; i++) { |
c53d793f HE |
1100 | a = (i >> (2 * index + 0)) & 1; |
1101 | b = (i >> (2 * index + 1)) & 1; | |
1102 | ||
1103 | aset = (*mask >> i) & 1; | |
1104 | bset = x[b][a]; | |
1105 | ||
382cb19f | 1106 | rset = 0; |
c53d793f HE |
1107 | if (func == FUNC_AND || func == FUNC_NAND) |
1108 | rset = aset & bset; | |
1109 | else if (func == FUNC_OR || func == FUNC_NOR) | |
1110 | rset = aset | bset; | |
1111 | else if (func == FUNC_XOR || func == FUNC_NXOR) | |
1112 | rset = aset ^ bset; | |
1113 | ||
1114 | if (func == FUNC_NAND || func == FUNC_NOR || func == FUNC_NXOR) | |
1115 | rset = !rset; | |
1116 | ||
1117 | *mask &= ~(1 << i); | |
1118 | ||
1119 | if (rset) | |
1120 | *mask |= 1 << i; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * Build trigger LUTs used by 50 MHz and lower sample rates for supporting | |
1126 | * simple pin change and state triggers. Only two transitions (rise/fall) can be | |
1127 | * set at any time, but a full mask and value can be set (0/1). | |
1128 | */ | |
3ba56876 | 1129 | SR_PRIV int sigma_build_basic_trigger(struct triggerlut *lut, struct dev_context *devc) |
c53d793f HE |
1130 | { |
1131 | int i,j; | |
4ae1f451 | 1132 | uint16_t masks[2] = { 0, 0 }; |
c53d793f HE |
1133 | |
1134 | memset(lut, 0, sizeof(struct triggerlut)); | |
1135 | ||
f3f19d11 | 1136 | /* Constant for simple triggers. */ |
c53d793f HE |
1137 | lut->m4 = 0xa000; |
1138 | ||
1139 | /* Value/mask trigger support. */ | |
0e1357e8 | 1140 | build_lut_entry(devc->trigger.simplevalue, devc->trigger.simplemask, |
99965709 | 1141 | lut->m2d); |
c53d793f HE |
1142 | |
1143 | /* Rise/fall trigger support. */ | |
0a1f7b09 | 1144 | for (i = 0, j = 0; i < 16; i++) { |
0e1357e8 BV |
1145 | if (devc->trigger.risingmask & (1 << i) || |
1146 | devc->trigger.fallingmask & (1 << i)) | |
c53d793f HE |
1147 | masks[j++] = 1 << i; |
1148 | } | |
1149 | ||
1150 | build_lut_entry(masks[0], masks[0], lut->m0d); | |
1151 | build_lut_entry(masks[1], masks[1], lut->m1d); | |
1152 | ||
1153 | /* Add glue logic */ | |
1154 | if (masks[0] || masks[1]) { | |
1155 | /* Transition trigger. */ | |
0e1357e8 | 1156 | if (masks[0] & devc->trigger.risingmask) |
c53d793f | 1157 | add_trigger_function(OP_RISE, FUNC_OR, 0, 0, &lut->m3); |
0e1357e8 | 1158 | if (masks[0] & devc->trigger.fallingmask) |
c53d793f | 1159 | add_trigger_function(OP_FALL, FUNC_OR, 0, 0, &lut->m3); |
0e1357e8 | 1160 | if (masks[1] & devc->trigger.risingmask) |
c53d793f | 1161 | add_trigger_function(OP_RISE, FUNC_OR, 1, 0, &lut->m3); |
0e1357e8 | 1162 | if (masks[1] & devc->trigger.fallingmask) |
c53d793f HE |
1163 | add_trigger_function(OP_FALL, FUNC_OR, 1, 0, &lut->m3); |
1164 | } else { | |
1165 | /* Only value/mask trigger. */ | |
1166 | lut->m3 = 0xffff; | |
1167 | } | |
ee492173 | 1168 | |
c53d793f | 1169 | /* Triggertype: event. */ |
ee492173 HE |
1170 | lut->params.selres = 3; |
1171 | ||
e46b8fb1 | 1172 | return SR_OK; |
ee492173 | 1173 | } |