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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 | |
742368a2 GS |
50 | static const char *firmware_files[] = { |
51 | "asix-sigma-50.fw", /* Up to 50MHz sample rate, 8bit divider. */ | |
52 | "asix-sigma-100.fw", /* 100MHz sample rate, fixed. */ | |
53 | "asix-sigma-200.fw", /* 200MHz sample rate, fixed. */ | |
54 | "asix-sigma-50sync.fw", /* Synchronous clock from external pin. */ | |
55 | "asix-sigma-phasor.fw", /* Frequency counter. */ | |
f6564c8d HE |
56 | }; |
57 | ||
742368a2 GS |
58 | #define SIGMA_FIRMWARE_SIZE_LIMIT (256 * 1024) |
59 | ||
0e1357e8 | 60 | static int sigma_read(void *buf, size_t size, struct dev_context *devc) |
28a35d8a HE |
61 | { |
62 | int ret; | |
fefa1800 | 63 | |
0e1357e8 | 64 | ret = ftdi_read_data(&devc->ftdic, (unsigned char *)buf, size); |
28a35d8a | 65 | if (ret < 0) { |
47f4f073 | 66 | sr_err("ftdi_read_data failed: %s", |
0e1357e8 | 67 | ftdi_get_error_string(&devc->ftdic)); |
28a35d8a HE |
68 | } |
69 | ||
70 | return ret; | |
71 | } | |
72 | ||
0e1357e8 | 73 | static int sigma_write(void *buf, size_t size, struct dev_context *devc) |
28a35d8a HE |
74 | { |
75 | int ret; | |
fefa1800 | 76 | |
0e1357e8 | 77 | ret = ftdi_write_data(&devc->ftdic, (unsigned char *)buf, size); |
8ebad343 | 78 | if (ret < 0) |
47f4f073 | 79 | sr_err("ftdi_write_data failed: %s", |
0e1357e8 | 80 | ftdi_get_error_string(&devc->ftdic)); |
8ebad343 | 81 | else if ((size_t) ret != size) |
47f4f073 | 82 | sr_err("ftdi_write_data did not complete write."); |
28a35d8a HE |
83 | |
84 | return ret; | |
85 | } | |
86 | ||
e8686e3a AG |
87 | /* |
88 | * NOTE: We chose the buffer size to be large enough to hold any write to the | |
89 | * device. We still print a message just in case. | |
90 | */ | |
3ba56876 | 91 | SR_PRIV int sigma_write_register(uint8_t reg, uint8_t *data, size_t len, |
92 | struct dev_context *devc) | |
28a35d8a HE |
93 | { |
94 | size_t i; | |
e8686e3a | 95 | uint8_t buf[80]; |
28a35d8a HE |
96 | int idx = 0; |
97 | ||
7c86d853 | 98 | if ((2 * len + 2) > sizeof(buf)) { |
e8686e3a | 99 | sr_err("Attempted to write %zu bytes, but buffer is too small.", |
7c86d853 | 100 | len); |
e8686e3a AG |
101 | return SR_ERR_BUG; |
102 | } | |
103 | ||
28a35d8a HE |
104 | buf[idx++] = REG_ADDR_LOW | (reg & 0xf); |
105 | buf[idx++] = REG_ADDR_HIGH | (reg >> 4); | |
106 | ||
0a1f7b09 | 107 | for (i = 0; i < len; i++) { |
28a35d8a HE |
108 | buf[idx++] = REG_DATA_LOW | (data[i] & 0xf); |
109 | buf[idx++] = REG_DATA_HIGH_WRITE | (data[i] >> 4); | |
110 | } | |
111 | ||
0e1357e8 | 112 | return sigma_write(buf, idx, devc); |
28a35d8a HE |
113 | } |
114 | ||
3ba56876 | 115 | SR_PRIV int sigma_set_register(uint8_t reg, uint8_t value, struct dev_context *devc) |
28a35d8a | 116 | { |
0e1357e8 | 117 | return sigma_write_register(reg, &value, 1, devc); |
28a35d8a HE |
118 | } |
119 | ||
99965709 | 120 | static int sigma_read_register(uint8_t reg, uint8_t *data, size_t len, |
0e1357e8 | 121 | struct dev_context *devc) |
28a35d8a HE |
122 | { |
123 | uint8_t buf[3]; | |
fefa1800 | 124 | |
28a35d8a HE |
125 | buf[0] = REG_ADDR_LOW | (reg & 0xf); |
126 | buf[1] = REG_ADDR_HIGH | (reg >> 4); | |
28a35d8a HE |
127 | buf[2] = REG_READ_ADDR; |
128 | ||
0e1357e8 | 129 | sigma_write(buf, sizeof(buf), devc); |
28a35d8a | 130 | |
0e1357e8 | 131 | return sigma_read(data, len, devc); |
28a35d8a HE |
132 | } |
133 | ||
99965709 | 134 | static int sigma_read_pos(uint32_t *stoppos, uint32_t *triggerpos, |
0e1357e8 | 135 | struct dev_context *devc) |
28a35d8a | 136 | { |
07411a60 GS |
137 | /* |
138 | * Read 6 registers starting at trigger position LSB. | |
139 | * Which yields two 24bit counter values. | |
140 | */ | |
28a35d8a HE |
141 | uint8_t buf[] = { |
142 | REG_ADDR_LOW | READ_TRIGGER_POS_LOW, | |
07411a60 GS |
143 | REG_READ_ADDR | REG_ADDR_INC, |
144 | REG_READ_ADDR | REG_ADDR_INC, | |
145 | REG_READ_ADDR | REG_ADDR_INC, | |
146 | REG_READ_ADDR | REG_ADDR_INC, | |
147 | REG_READ_ADDR | REG_ADDR_INC, | |
148 | REG_READ_ADDR | REG_ADDR_INC, | |
28a35d8a | 149 | }; |
28a35d8a HE |
150 | uint8_t result[6]; |
151 | ||
0e1357e8 | 152 | sigma_write(buf, sizeof(buf), devc); |
28a35d8a | 153 | |
0e1357e8 | 154 | sigma_read(result, sizeof(result), devc); |
28a35d8a HE |
155 | |
156 | *triggerpos = result[0] | (result[1] << 8) | (result[2] << 16); | |
157 | *stoppos = result[3] | (result[4] << 8) | (result[5] << 16); | |
158 | ||
dc400817 GS |
159 | /* |
160 | * These "position" values point to after the event (end of | |
161 | * capture data, trigger condition matched). This is why they | |
162 | * get decremented here. Sample memory consists of 512-byte | |
163 | * chunks with meta data in the upper 64 bytes. Thus when the | |
164 | * decrements takes us into this upper part of the chunk, then | |
165 | * further move backwards to the end of the chunk's data part. | |
166 | */ | |
57bbf56b | 167 | if ((--*stoppos & 0x1ff) == 0x1ff) |
382cb19f | 168 | *stoppos -= 64; |
dc400817 | 169 | if ((--*triggerpos & 0x1ff) == 0x1ff) |
382cb19f | 170 | *triggerpos -= 64; |
57bbf56b | 171 | |
28a35d8a HE |
172 | return 1; |
173 | } | |
174 | ||
99965709 | 175 | static int sigma_read_dram(uint16_t startchunk, size_t numchunks, |
0e1357e8 | 176 | uint8_t *data, struct dev_context *devc) |
28a35d8a | 177 | { |
28a35d8a | 178 | uint8_t buf[4096]; |
f06fb3e9 | 179 | int idx; |
07411a60 GS |
180 | size_t chunk; |
181 | int sel; | |
182 | gboolean is_last; | |
28a35d8a | 183 | |
07411a60 | 184 | /* Communicate DRAM start address (memory row, aka samples line). */ |
f06fb3e9 GS |
185 | idx = 0; |
186 | buf[idx++] = startchunk >> 8; | |
187 | buf[idx++] = startchunk & 0xff; | |
188 | sigma_write_register(WRITE_MEMROW, buf, idx, devc); | |
28a35d8a | 189 | |
07411a60 GS |
190 | /* |
191 | * Access DRAM content. Fetch from DRAM to FPGA's internal RAM, | |
192 | * then transfer via USB. Interleave the FPGA's DRAM access and | |
193 | * USB transfer, use alternating buffers (0/1) in the process. | |
194 | */ | |
f06fb3e9 | 195 | idx = 0; |
28a35d8a HE |
196 | buf[idx++] = REG_DRAM_BLOCK; |
197 | buf[idx++] = REG_DRAM_WAIT_ACK; | |
07411a60 GS |
198 | for (chunk = 0; chunk < numchunks; chunk++) { |
199 | sel = chunk % 2; | |
200 | is_last = chunk == numchunks - 1; | |
201 | if (!is_last) | |
202 | buf[idx++] = REG_DRAM_BLOCK | REG_DRAM_SEL_BOOL(!sel); | |
203 | buf[idx++] = REG_DRAM_BLOCK_DATA | REG_DRAM_SEL_BOOL(sel); | |
204 | if (!is_last) | |
28a35d8a HE |
205 | buf[idx++] = REG_DRAM_WAIT_ACK; |
206 | } | |
0e1357e8 | 207 | sigma_write(buf, idx, devc); |
28a35d8a | 208 | |
0e1357e8 | 209 | return sigma_read(data, numchunks * CHUNK_SIZE, devc); |
28a35d8a HE |
210 | } |
211 | ||
4ae1f451 | 212 | /* Upload trigger look-up tables to Sigma. */ |
3ba56876 | 213 | SR_PRIV int sigma_write_trigger_lut(struct triggerlut *lut, struct dev_context *devc) |
ee492173 HE |
214 | { |
215 | int i; | |
216 | uint8_t tmp[2]; | |
217 | uint16_t bit; | |
218 | ||
219 | /* Transpose the table and send to Sigma. */ | |
0a1f7b09 | 220 | for (i = 0; i < 16; i++) { |
ee492173 HE |
221 | bit = 1 << i; |
222 | ||
223 | tmp[0] = tmp[1] = 0; | |
224 | ||
225 | if (lut->m2d[0] & bit) | |
226 | tmp[0] |= 0x01; | |
227 | if (lut->m2d[1] & bit) | |
228 | tmp[0] |= 0x02; | |
229 | if (lut->m2d[2] & bit) | |
230 | tmp[0] |= 0x04; | |
231 | if (lut->m2d[3] & bit) | |
232 | tmp[0] |= 0x08; | |
233 | ||
234 | if (lut->m3 & bit) | |
235 | tmp[0] |= 0x10; | |
236 | if (lut->m3s & bit) | |
237 | tmp[0] |= 0x20; | |
238 | if (lut->m4 & bit) | |
239 | tmp[0] |= 0x40; | |
240 | ||
241 | if (lut->m0d[0] & bit) | |
242 | tmp[1] |= 0x01; | |
243 | if (lut->m0d[1] & bit) | |
244 | tmp[1] |= 0x02; | |
245 | if (lut->m0d[2] & bit) | |
246 | tmp[1] |= 0x04; | |
247 | if (lut->m0d[3] & bit) | |
248 | tmp[1] |= 0x08; | |
249 | ||
250 | if (lut->m1d[0] & bit) | |
251 | tmp[1] |= 0x10; | |
252 | if (lut->m1d[1] & bit) | |
253 | tmp[1] |= 0x20; | |
254 | if (lut->m1d[2] & bit) | |
255 | tmp[1] |= 0x40; | |
256 | if (lut->m1d[3] & bit) | |
257 | tmp[1] |= 0x80; | |
258 | ||
9fb4c632 | 259 | sigma_write_register(WRITE_TRIGGER_SELECT, tmp, sizeof(tmp), |
0e1357e8 | 260 | devc); |
9fb4c632 | 261 | sigma_set_register(WRITE_TRIGGER_SELECT2, 0x30 | i, devc); |
ee492173 HE |
262 | } |
263 | ||
264 | /* Send the parameters */ | |
9fb4c632 | 265 | sigma_write_register(WRITE_TRIGGER_SELECT, (uint8_t *) &lut->params, |
0e1357e8 | 266 | sizeof(lut->params), devc); |
ee492173 | 267 | |
e46b8fb1 | 268 | return SR_OK; |
ee492173 HE |
269 | } |
270 | ||
d5fa188a | 271 | /* |
dc0906e2 GS |
272 | * See Xilinx UG332 for Spartan-3 FPGA configuration. The SIGMA device |
273 | * uses FTDI bitbang mode for netlist download in slave serial mode. | |
274 | * (LATER: The OMEGA device's cable contains a more capable FTDI chip | |
275 | * and uses MPSSE mode for bitbang. -- Can we also use FT232H in FT245 | |
276 | * compatible bitbang mode? For maximum code re-use and reduced libftdi | |
277 | * dependency? See section 3.5.5 of FT232H: D0 clk, D1 data (out), D2 | |
278 | * data (in), D3 select, D4-7 GPIOL. See section 3.5.7 for MCU FIFO.) | |
279 | * | |
280 | * 750kbps rate (four times the speed of sigmalogan) works well for | |
281 | * netlist download. All pins except INIT_B are output pins during | |
282 | * configuration download. | |
283 | * | |
284 | * Some pins are inverted as a byproduct of level shifting circuitry. | |
285 | * That's why high CCLK level (from the cable's point of view) is idle | |
286 | * from the FPGA's perspective. | |
287 | * | |
288 | * The vendor's literature discusses a "suicide sequence" which ends | |
289 | * regular FPGA execution and should be sent before entering bitbang | |
290 | * mode and sending configuration data. Set D7 and toggle D2, D3, D4 | |
291 | * a few times. | |
292 | */ | |
293 | #define BB_PIN_CCLK (1 << 0) /* D0, CCLK */ | |
294 | #define BB_PIN_PROG (1 << 1) /* D1, PROG */ | |
295 | #define BB_PIN_D2 (1 << 2) /* D2, (part of) SUICIDE */ | |
296 | #define BB_PIN_D3 (1 << 3) /* D3, (part of) SUICIDE */ | |
297 | #define BB_PIN_D4 (1 << 4) /* D4, (part of) SUICIDE (unused?) */ | |
298 | #define BB_PIN_INIT (1 << 5) /* D5, INIT, input pin */ | |
299 | #define BB_PIN_DIN (1 << 6) /* D6, DIN */ | |
300 | #define BB_PIN_D7 (1 << 7) /* D7, (part of) SUICIDE */ | |
301 | ||
302 | #define BB_BITRATE (750 * 1000) | |
303 | #define BB_PINMASK (0xff & ~BB_PIN_INIT) | |
304 | ||
305 | /* | |
306 | * Initiate slave serial mode for configuration download. Which is done | |
307 | * by pulsing PROG_B and sensing INIT_B. Make sure CCLK is idle before | |
308 | * initiating the configuration download. Run a "suicide sequence" first | |
309 | * to terminate the regular FPGA operation before reconfiguration. | |
d5fa188a MV |
310 | */ |
311 | static int sigma_fpga_init_bitbang(struct dev_context *devc) | |
312 | { | |
313 | uint8_t suicide[] = { | |
dc0906e2 GS |
314 | BB_PIN_D7 | BB_PIN_D2, |
315 | BB_PIN_D7 | BB_PIN_D2, | |
316 | BB_PIN_D7 | BB_PIN_D3, | |
317 | BB_PIN_D7 | BB_PIN_D2, | |
318 | BB_PIN_D7 | BB_PIN_D3, | |
319 | BB_PIN_D7 | BB_PIN_D2, | |
320 | BB_PIN_D7 | BB_PIN_D3, | |
321 | BB_PIN_D7 | BB_PIN_D2, | |
d5fa188a MV |
322 | }; |
323 | uint8_t init_array[] = { | |
dc0906e2 GS |
324 | BB_PIN_CCLK, |
325 | BB_PIN_CCLK | BB_PIN_PROG, | |
326 | BB_PIN_CCLK | BB_PIN_PROG, | |
327 | BB_PIN_CCLK, | |
328 | BB_PIN_CCLK, | |
329 | BB_PIN_CCLK, | |
330 | BB_PIN_CCLK, | |
331 | BB_PIN_CCLK, | |
332 | BB_PIN_CCLK, | |
333 | BB_PIN_CCLK, | |
d5fa188a | 334 | }; |
dc0906e2 | 335 | int retries, ret; |
d5fa188a MV |
336 | uint8_t data; |
337 | ||
338 | /* Section 2. part 1), do the FPGA suicide. */ | |
339 | sigma_write(suicide, sizeof(suicide), devc); | |
340 | sigma_write(suicide, sizeof(suicide), devc); | |
341 | sigma_write(suicide, sizeof(suicide), devc); | |
342 | sigma_write(suicide, sizeof(suicide), devc); | |
343 | ||
dc0906e2 | 344 | /* Section 2. part 2), pulse PROG. */ |
d5fa188a MV |
345 | sigma_write(init_array, sizeof(init_array), devc); |
346 | ftdi_usb_purge_buffers(&devc->ftdic); | |
347 | ||
dc0906e2 GS |
348 | /* Wait until the FPGA asserts INIT_B. */ |
349 | retries = 10; | |
350 | while (retries--) { | |
d5fa188a MV |
351 | ret = sigma_read(&data, 1, devc); |
352 | if (ret < 0) | |
353 | return ret; | |
dc0906e2 GS |
354 | if (data & BB_PIN_INIT) |
355 | return SR_OK; | |
1a46cc62 | 356 | g_usleep(10 * 1000); |
d5fa188a MV |
357 | } |
358 | ||
359 | return SR_ERR_TIMEOUT; | |
360 | } | |
361 | ||
64fe661b MV |
362 | /* |
363 | * Configure the FPGA for logic-analyzer mode. | |
364 | */ | |
365 | static int sigma_fpga_init_la(struct dev_context *devc) | |
366 | { | |
dc0906e2 GS |
367 | /* |
368 | * TODO Construct the sequence at runtime? Such that request data | |
369 | * and response check values will match more apparently? | |
370 | */ | |
22f64ed8 | 371 | uint8_t mode_regval = WMR_SDRAMINIT; |
64fe661b | 372 | uint8_t logic_mode_start[] = { |
dc0906e2 | 373 | /* Read ID register. */ |
011f1091 | 374 | REG_ADDR_LOW | (READ_ID & 0xf), |
84a6ed1a | 375 | REG_ADDR_HIGH | (READ_ID >> 4), |
dc0906e2 | 376 | REG_READ_ADDR, |
011f1091 | 377 | |
dc0906e2 | 378 | /* Write 0x55 to scratch register, read back. */ |
011f1091 MV |
379 | REG_ADDR_LOW | (WRITE_TEST & 0xf), |
380 | REG_DATA_LOW | 0x5, | |
381 | REG_DATA_HIGH_WRITE | 0x5, | |
dc0906e2 | 382 | REG_READ_ADDR, |
011f1091 | 383 | |
dc0906e2 | 384 | /* Write 0xaa to scratch register, read back. */ |
011f1091 MV |
385 | REG_DATA_LOW | 0xa, |
386 | REG_DATA_HIGH_WRITE | 0xa, | |
dc0906e2 | 387 | REG_READ_ADDR, |
011f1091 | 388 | |
dc0906e2 | 389 | /* Initiate SDRAM initialization in mode register. */ |
011f1091 | 390 | REG_ADDR_LOW | (WRITE_MODE & 0xf), |
22f64ed8 GS |
391 | REG_DATA_LOW | (mode_regval & 0xf), |
392 | REG_DATA_HIGH_WRITE | (mode_regval >> 4), | |
64fe661b | 393 | }; |
64fe661b MV |
394 | uint8_t result[3]; |
395 | int ret; | |
396 | ||
dc0906e2 GS |
397 | /* |
398 | * Send the command sequence which contains 3 READ requests. | |
399 | * Expect to see the corresponding 3 response bytes. | |
400 | */ | |
64fe661b | 401 | sigma_write(logic_mode_start, sizeof(logic_mode_start), devc); |
dc0906e2 GS |
402 | ret = sigma_read(result, ARRAY_SIZE(result), devc); |
403 | if (ret != ARRAY_SIZE(result)) | |
64fe661b | 404 | goto err; |
64fe661b MV |
405 | if (result[0] != 0xa6 || result[1] != 0x55 || result[2] != 0xaa) |
406 | goto err; | |
407 | ||
408 | return SR_OK; | |
dc0906e2 | 409 | |
64fe661b MV |
410 | err: |
411 | sr_err("Configuration failed. Invalid reply received."); | |
412 | return SR_ERR; | |
413 | } | |
414 | ||
a80226bb MV |
415 | /* |
416 | * Read the firmware from a file and transform it into a series of bitbang | |
417 | * pulses used to program the FPGA. Note that the *bb_cmd must be free()'d | |
418 | * by the caller of this function. | |
419 | */ | |
8e2d6c9d | 420 | static int sigma_fw_2_bitbang(struct sr_context *ctx, const char *name, |
a80226bb MV |
421 | uint8_t **bb_cmd, gsize *bb_cmd_size) |
422 | { | |
dc0906e2 GS |
423 | uint8_t *firmware; |
424 | size_t file_size; | |
425 | uint8_t *p; | |
426 | size_t l; | |
a80226bb | 427 | uint32_t imm; |
dc0906e2 GS |
428 | size_t bb_size; |
429 | uint8_t *bb_stream, *bbs, byte, mask, v; | |
a80226bb | 430 | |
387825dc | 431 | /* Retrieve the on-disk firmware file content. */ |
742368a2 GS |
432 | firmware = sr_resource_load(ctx, SR_RESOURCE_FIRMWARE, name, |
433 | &file_size, SIGMA_FIRMWARE_SIZE_LIMIT); | |
8e2d6c9d | 434 | if (!firmware) |
dc0906e2 | 435 | return SR_ERR_IO; |
a80226bb | 436 | |
387825dc | 437 | /* Unscramble the file content (XOR with "random" sequence). */ |
dc0906e2 GS |
438 | p = firmware; |
439 | l = file_size; | |
a80226bb | 440 | imm = 0x3f6df2ab; |
dc0906e2 | 441 | while (l--) { |
a80226bb | 442 | imm = (imm + 0xa853753) % 177 + (imm * 0x8034052); |
dc0906e2 | 443 | *p++ ^= imm & 0xff; |
a80226bb MV |
444 | } |
445 | ||
446 | /* | |
387825dc GS |
447 | * Generate a sequence of bitbang samples. With two samples per |
448 | * FPGA configuration bit, providing the level for the DIN signal | |
449 | * as well as two edges for CCLK. See Xilinx UG332 for details | |
450 | * ("slave serial" mode). | |
451 | * | |
452 | * Note that CCLK is inverted in hardware. That's why the | |
453 | * respective bit is first set and then cleared in the bitbang | |
454 | * sample sets. So that the DIN level will be stable when the | |
455 | * data gets sampled at the rising CCLK edge, and the signals' | |
456 | * setup time constraint will be met. | |
457 | * | |
458 | * The caller will put the FPGA into download mode, will send | |
459 | * the bitbang samples, and release the allocated memory. | |
a80226bb | 460 | */ |
a80226bb | 461 | bb_size = file_size * 8 * 2; |
dc0906e2 | 462 | bb_stream = g_try_malloc(bb_size); |
a80226bb MV |
463 | if (!bb_stream) { |
464 | sr_err("%s: Failed to allocate bitbang stream", __func__); | |
dc0906e2 GS |
465 | g_free(firmware); |
466 | return SR_ERR_MALLOC; | |
a80226bb | 467 | } |
a80226bb | 468 | bbs = bb_stream; |
dc0906e2 GS |
469 | p = firmware; |
470 | l = file_size; | |
471 | while (l--) { | |
472 | byte = *p++; | |
473 | mask = 0x80; | |
474 | while (mask) { | |
475 | v = (byte & mask) ? BB_PIN_DIN : 0; | |
476 | mask >>= 1; | |
477 | *bbs++ = v | BB_PIN_CCLK; | |
a80226bb MV |
478 | *bbs++ = v; |
479 | } | |
480 | } | |
dc0906e2 | 481 | g_free(firmware); |
a80226bb MV |
482 | |
483 | /* The transformation completed successfully, return the result. */ | |
484 | *bb_cmd = bb_stream; | |
485 | *bb_cmd_size = bb_size; | |
486 | ||
dc0906e2 | 487 | return SR_OK; |
a80226bb MV |
488 | } |
489 | ||
8e2d6c9d DE |
490 | static int upload_firmware(struct sr_context *ctx, |
491 | int firmware_idx, struct dev_context *devc) | |
28a35d8a HE |
492 | { |
493 | int ret; | |
494 | unsigned char *buf; | |
495 | unsigned char pins; | |
496 | size_t buf_size; | |
a9016883 | 497 | const char *firmware; |
a9016883 GS |
498 | |
499 | /* Avoid downloading the same firmware multiple times. */ | |
4b25cbff | 500 | firmware = firmware_files[firmware_idx]; |
a9016883 GS |
501 | if (devc->cur_firmware == firmware_idx) { |
502 | sr_info("Not uploading firmware file '%s' again.", firmware); | |
503 | return SR_OK; | |
504 | } | |
28a35d8a | 505 | |
dc0906e2 GS |
506 | /* Set the cable to bitbang mode. */ |
507 | ret = ftdi_set_bitmode(&devc->ftdic, BB_PINMASK, BITMODE_BITBANG); | |
8bbf7627 | 508 | if (ret < 0) { |
47f4f073 | 509 | sr_err("ftdi_set_bitmode failed: %s", |
1f4f98e0 | 510 | ftdi_get_error_string(&devc->ftdic)); |
7bcf2168 | 511 | return SR_ERR; |
28a35d8a | 512 | } |
dc0906e2 | 513 | ret = ftdi_set_baudrate(&devc->ftdic, BB_BITRATE); |
8bbf7627 | 514 | if (ret < 0) { |
47f4f073 | 515 | sr_err("ftdi_set_baudrate failed: %s", |
1f4f98e0 | 516 | ftdi_get_error_string(&devc->ftdic)); |
7bcf2168 | 517 | return SR_ERR; |
28a35d8a HE |
518 | } |
519 | ||
dc0906e2 | 520 | /* Initiate FPGA configuration mode. */ |
d5fa188a MV |
521 | ret = sigma_fpga_init_bitbang(devc); |
522 | if (ret) | |
523 | return ret; | |
28a35d8a | 524 | |
dc0906e2 | 525 | /* Prepare wire format of the firmware image. */ |
8e2d6c9d | 526 | ret = sigma_fw_2_bitbang(ctx, firmware, &buf, &buf_size); |
8bbf7627 | 527 | if (ret != SR_OK) { |
f3f19d11 | 528 | sr_err("An error occurred while reading the firmware: %s", |
499b17e9 | 529 | firmware); |
b53738ba | 530 | return ret; |
28a35d8a HE |
531 | } |
532 | ||
dc0906e2 | 533 | /* Write the FPGA netlist to the cable. */ |
499b17e9 | 534 | sr_info("Uploading firmware file '%s'.", firmware); |
0e1357e8 | 535 | sigma_write(buf, buf_size, devc); |
28a35d8a HE |
536 | |
537 | g_free(buf); | |
538 | ||
dc0906e2 GS |
539 | /* Leave bitbang mode and discard pending input data. */ |
540 | ret = ftdi_set_bitmode(&devc->ftdic, 0, BITMODE_RESET); | |
8bbf7627 | 541 | if (ret < 0) { |
47f4f073 | 542 | sr_err("ftdi_set_bitmode failed: %s", |
1f4f98e0 | 543 | ftdi_get_error_string(&devc->ftdic)); |
e46b8fb1 | 544 | return SR_ERR; |
28a35d8a | 545 | } |
1f4f98e0 | 546 | ftdi_usb_purge_buffers(&devc->ftdic); |
29b66a2e | 547 | while (sigma_read(&pins, 1, devc) == 1) |
28a35d8a HE |
548 | ; |
549 | ||
64fe661b MV |
550 | /* Initialize the FPGA for logic-analyzer mode. */ |
551 | ret = sigma_fpga_init_la(devc); | |
552 | if (ret != SR_OK) | |
553 | return ret; | |
28a35d8a | 554 | |
dc0906e2 | 555 | /* Keep track of successful firmware download completion. */ |
0e1357e8 | 556 | devc->cur_firmware = firmware_idx; |
47f4f073 | 557 | sr_info("Firmware uploaded."); |
e3fff420 | 558 | |
e46b8fb1 | 559 | return SR_OK; |
f6564c8d HE |
560 | } |
561 | ||
9a0a606a GS |
562 | /* |
563 | * Sigma doesn't support limiting the number of samples, so we have to | |
564 | * translate the number and the samplerate to an elapsed time. | |
565 | * | |
566 | * In addition we need to ensure that the last data cluster has passed | |
567 | * the hardware pipeline, and became available to the PC side. With RLE | |
568 | * compression up to 327ms could pass before another cluster accumulates | |
569 | * at 200kHz samplerate when input pins don't change. | |
570 | */ | |
571 | SR_PRIV uint64_t sigma_limit_samples_to_msec(const struct dev_context *devc, | |
572 | uint64_t limit_samples) | |
573 | { | |
574 | uint64_t limit_msec; | |
575 | uint64_t worst_cluster_time_ms; | |
576 | ||
577 | limit_msec = limit_samples * 1000 / devc->cur_samplerate; | |
578 | worst_cluster_time_ms = 65536 * 1000 / devc->cur_samplerate; | |
579 | /* | |
580 | * One cluster time is not enough to flush pipeline when sampling | |
581 | * grounded pins with 1 sample limit at 200kHz. Hence the 2* fix. | |
582 | */ | |
583 | return limit_msec + 2 * worst_cluster_time_ms; | |
584 | } | |
585 | ||
3ba56876 | 586 | SR_PRIV int sigma_set_samplerate(const struct sr_dev_inst *sdi, uint64_t samplerate) |
f6564c8d | 587 | { |
2c9c0df8 | 588 | struct dev_context *devc; |
8e2d6c9d | 589 | struct drv_context *drvc; |
4154a516 | 590 | size_t i; |
2c9c0df8 | 591 | int ret; |
ac9534f4 | 592 | int num_channels; |
f6564c8d | 593 | |
2c9c0df8 | 594 | devc = sdi->priv; |
8e2d6c9d | 595 | drvc = sdi->driver->context; |
f4abaa9f UH |
596 | ret = SR_OK; |
597 | ||
2f7e529c | 598 | /* Reject rates that are not in the list of supported rates. */ |
4154a516 | 599 | for (i = 0; i < samplerates_count; i++) { |
2c9c0df8 | 600 | if (samplerates[i] == samplerate) |
f6564c8d HE |
601 | break; |
602 | } | |
4154a516 | 603 | if (i >= samplerates_count || samplerates[i] == 0) |
e46b8fb1 | 604 | return SR_ERR_SAMPLERATE; |
f6564c8d | 605 | |
2f7e529c GS |
606 | /* |
607 | * Depending on the samplerates of 200/100/50- MHz, specific | |
608 | * firmware is required and higher rates might limit the set | |
609 | * of available channels. | |
610 | */ | |
ac9534f4 | 611 | num_channels = devc->num_channels; |
59df0c77 | 612 | if (samplerate <= SR_MHZ(50)) { |
8e2d6c9d | 613 | ret = upload_firmware(drvc->sr_ctx, 0, devc); |
ac9534f4 | 614 | num_channels = 16; |
6b2d3385 | 615 | } else if (samplerate == SR_MHZ(100)) { |
8e2d6c9d | 616 | ret = upload_firmware(drvc->sr_ctx, 1, devc); |
ac9534f4 | 617 | num_channels = 8; |
6b2d3385 | 618 | } else if (samplerate == SR_MHZ(200)) { |
8e2d6c9d | 619 | ret = upload_firmware(drvc->sr_ctx, 2, devc); |
ac9534f4 | 620 | num_channels = 4; |
f78898e9 | 621 | } |
f6564c8d | 622 | |
2f7e529c GS |
623 | /* |
624 | * Derive the sample period from the sample rate as well as the | |
625 | * number of samples that the device will communicate within | |
626 | * an "event" (memory organization internal to the device). | |
627 | */ | |
6b2d3385 | 628 | if (ret == SR_OK) { |
ac9534f4 | 629 | devc->num_channels = num_channels; |
6b2d3385 | 630 | devc->cur_samplerate = samplerate; |
6b2d3385 BV |
631 | devc->samples_per_event = 16 / devc->num_channels; |
632 | devc->state.state = SIGMA_IDLE; | |
633 | } | |
f6564c8d | 634 | |
2f7e529c GS |
635 | /* |
636 | * Support for "limit_samples" is implemented by stopping | |
637 | * acquisition after a corresponding period of time. | |
638 | * Re-calculate that period of time, in case the limit is | |
639 | * set first and the samplerate gets (re-)configured later. | |
640 | */ | |
641 | if (ret == SR_OK && devc->limit_samples) { | |
642 | uint64_t msecs; | |
9a0a606a | 643 | msecs = sigma_limit_samples_to_msec(devc, devc->limit_samples); |
2f7e529c GS |
644 | devc->limit_msec = msecs; |
645 | } | |
646 | ||
e8397563 | 647 | return ret; |
28a35d8a HE |
648 | } |
649 | ||
c53d793f HE |
650 | /* |
651 | * In 100 and 200 MHz mode, only a single pin rising/falling can be | |
652 | * set as trigger. In other modes, two rising/falling triggers can be set, | |
ba7dd8bb | 653 | * in addition to value/mask trigger for any number of channels. |
c53d793f HE |
654 | * |
655 | * The Sigma supports complex triggers using boolean expressions, but this | |
656 | * has not been implemented yet. | |
657 | */ | |
3ba56876 | 658 | SR_PRIV int sigma_convert_trigger(const struct sr_dev_inst *sdi) |
57bbf56b | 659 | { |
39c64c6a BV |
660 | struct dev_context *devc; |
661 | struct sr_trigger *trigger; | |
662 | struct sr_trigger_stage *stage; | |
663 | struct sr_trigger_match *match; | |
664 | const GSList *l, *m; | |
665 | int channelbit, trigger_set; | |
57bbf56b | 666 | |
39c64c6a | 667 | devc = sdi->priv; |
0e1357e8 | 668 | memset(&devc->trigger, 0, sizeof(struct sigma_trigger)); |
0812c40e | 669 | if (!(trigger = sr_session_trigger_get(sdi->session))) |
39c64c6a BV |
670 | return SR_OK; |
671 | ||
672 | trigger_set = 0; | |
673 | for (l = trigger->stages; l; l = l->next) { | |
674 | stage = l->data; | |
675 | for (m = stage->matches; m; m = m->next) { | |
676 | match = m->data; | |
677 | if (!match->channel->enabled) | |
678 | /* Ignore disabled channels with a trigger. */ | |
679 | continue; | |
680 | channelbit = 1 << (match->channel->index); | |
681 | if (devc->cur_samplerate >= SR_MHZ(100)) { | |
682 | /* Fast trigger support. */ | |
683 | if (trigger_set) { | |
684 | sr_err("Only a single pin trigger is " | |
685 | "supported in 100 and 200MHz mode."); | |
686 | return SR_ERR; | |
687 | } | |
688 | if (match->match == SR_TRIGGER_FALLING) | |
689 | devc->trigger.fallingmask |= channelbit; | |
690 | else if (match->match == SR_TRIGGER_RISING) | |
691 | devc->trigger.risingmask |= channelbit; | |
692 | else { | |
693 | sr_err("Only rising/falling trigger is " | |
694 | "supported in 100 and 200MHz mode."); | |
695 | return SR_ERR; | |
696 | } | |
eec5275e | 697 | |
0a1f7b09 | 698 | trigger_set++; |
39c64c6a BV |
699 | } else { |
700 | /* Simple trigger support (event). */ | |
701 | if (match->match == SR_TRIGGER_ONE) { | |
702 | devc->trigger.simplevalue |= channelbit; | |
703 | devc->trigger.simplemask |= channelbit; | |
8ebad343 | 704 | } else if (match->match == SR_TRIGGER_ZERO) { |
39c64c6a BV |
705 | devc->trigger.simplevalue &= ~channelbit; |
706 | devc->trigger.simplemask |= channelbit; | |
8ebad343 | 707 | } else if (match->match == SR_TRIGGER_FALLING) { |
39c64c6a | 708 | devc->trigger.fallingmask |= channelbit; |
0a1f7b09 | 709 | trigger_set++; |
8ebad343 | 710 | } else if (match->match == SR_TRIGGER_RISING) { |
39c64c6a | 711 | devc->trigger.risingmask |= channelbit; |
0a1f7b09 | 712 | trigger_set++; |
39c64c6a BV |
713 | } |
714 | ||
715 | /* | |
716 | * Actually, Sigma supports 2 rising/falling triggers, | |
717 | * but they are ORed and the current trigger syntax | |
718 | * does not permit ORed triggers. | |
719 | */ | |
720 | if (trigger_set > 1) { | |
721 | sr_err("Only 1 rising/falling trigger " | |
722 | "is supported."); | |
723 | return SR_ERR; | |
724 | } | |
ee492173 | 725 | } |
ee492173 | 726 | } |
57bbf56b HE |
727 | } |
728 | ||
e46b8fb1 | 729 | return SR_OK; |
57bbf56b HE |
730 | } |
731 | ||
36b1c8e6 | 732 | /* Software trigger to determine exact trigger position. */ |
5fc01191 | 733 | static int get_trigger_offset(uint8_t *samples, uint16_t last_sample, |
36b1c8e6 HE |
734 | struct sigma_trigger *t) |
735 | { | |
736 | int i; | |
5fc01191 | 737 | uint16_t sample = 0; |
36b1c8e6 | 738 | |
0a1f7b09 | 739 | for (i = 0; i < 8; i++) { |
36b1c8e6 | 740 | if (i > 0) |
5fc01191 MV |
741 | last_sample = sample; |
742 | sample = samples[2 * i] | (samples[2 * i + 1] << 8); | |
36b1c8e6 HE |
743 | |
744 | /* Simple triggers. */ | |
5fc01191 | 745 | if ((sample & t->simplemask) != t->simplevalue) |
36b1c8e6 HE |
746 | continue; |
747 | ||
748 | /* Rising edge. */ | |
5fc01191 MV |
749 | if (((last_sample & t->risingmask) != 0) || |
750 | ((sample & t->risingmask) != t->risingmask)) | |
36b1c8e6 HE |
751 | continue; |
752 | ||
753 | /* Falling edge. */ | |
bdfc7a89 | 754 | if ((last_sample & t->fallingmask) != t->fallingmask || |
5fc01191 | 755 | (sample & t->fallingmask) != 0) |
36b1c8e6 HE |
756 | continue; |
757 | ||
758 | break; | |
759 | } | |
760 | ||
761 | /* If we did not match, return original trigger pos. */ | |
762 | return i & 0x7; | |
763 | } | |
764 | ||
3513d965 MV |
765 | /* |
766 | * Return the timestamp of "DRAM cluster". | |
767 | */ | |
768 | static uint16_t sigma_dram_cluster_ts(struct sigma_dram_cluster *cluster) | |
769 | { | |
770 | return (cluster->timestamp_hi << 8) | cluster->timestamp_lo; | |
771 | } | |
772 | ||
0498f743 GS |
773 | /* |
774 | * Return one 16bit data entity of a DRAM cluster at the specified index. | |
775 | */ | |
776 | static uint16_t sigma_dram_cluster_data(struct sigma_dram_cluster *cl, int idx) | |
777 | { | |
778 | uint16_t sample; | |
779 | ||
780 | sample = 0; | |
781 | sample |= cl->samples[idx].sample_lo << 0; | |
782 | sample |= cl->samples[idx].sample_hi << 8; | |
3281cf59 | 783 | sample = (sample >> 8) | (sample << 8); |
0498f743 GS |
784 | return sample; |
785 | } | |
786 | ||
85c032e4 GS |
787 | /* |
788 | * Deinterlace sample data that was retrieved at 100MHz samplerate. | |
789 | * One 16bit item contains two samples of 8bits each. The bits of | |
790 | * multiple samples are interleaved. | |
791 | */ | |
792 | static uint16_t sigma_deinterlace_100mhz_data(uint16_t indata, int idx) | |
793 | { | |
794 | uint16_t outdata; | |
795 | ||
796 | indata >>= idx; | |
797 | outdata = 0; | |
798 | outdata |= (indata >> (0 * 2 - 0)) & (1 << 0); | |
799 | outdata |= (indata >> (1 * 2 - 1)) & (1 << 1); | |
800 | outdata |= (indata >> (2 * 2 - 2)) & (1 << 2); | |
801 | outdata |= (indata >> (3 * 2 - 3)) & (1 << 3); | |
802 | outdata |= (indata >> (4 * 2 - 4)) & (1 << 4); | |
803 | outdata |= (indata >> (5 * 2 - 5)) & (1 << 5); | |
804 | outdata |= (indata >> (6 * 2 - 6)) & (1 << 6); | |
805 | outdata |= (indata >> (7 * 2 - 7)) & (1 << 7); | |
806 | return outdata; | |
807 | } | |
808 | ||
809 | /* | |
810 | * Deinterlace sample data that was retrieved at 200MHz samplerate. | |
811 | * One 16bit item contains four samples of 4bits each. The bits of | |
812 | * multiple samples are interleaved. | |
813 | */ | |
814 | static uint16_t sigma_deinterlace_200mhz_data(uint16_t indata, int idx) | |
815 | { | |
816 | uint16_t outdata; | |
817 | ||
818 | indata >>= idx; | |
819 | outdata = 0; | |
820 | outdata |= (indata >> (0 * 4 - 0)) & (1 << 0); | |
821 | outdata |= (indata >> (1 * 4 - 1)) & (1 << 1); | |
822 | outdata |= (indata >> (2 * 4 - 2)) & (1 << 2); | |
823 | outdata |= (indata >> (3 * 4 - 3)) & (1 << 3); | |
824 | return outdata; | |
825 | } | |
826 | ||
0498f743 GS |
827 | static void store_sr_sample(uint8_t *samples, int idx, uint16_t data) |
828 | { | |
829 | samples[2 * idx + 0] = (data >> 0) & 0xff; | |
830 | samples[2 * idx + 1] = (data >> 8) & 0xff; | |
831 | } | |
832 | ||
735ed8a1 GS |
833 | /* |
834 | * Local wrapper around sr_session_send() calls. Make sure to not send | |
835 | * more samples to the session's datafeed than what was requested by a | |
836 | * previously configured (optional) sample count. | |
837 | */ | |
838 | static void sigma_session_send(struct sr_dev_inst *sdi, | |
839 | struct sr_datafeed_packet *packet) | |
840 | { | |
841 | struct dev_context *devc; | |
842 | struct sr_datafeed_logic *logic; | |
843 | uint64_t send_now; | |
844 | ||
845 | devc = sdi->priv; | |
846 | if (devc->limit_samples) { | |
847 | logic = (void *)packet->payload; | |
848 | send_now = logic->length / logic->unitsize; | |
849 | if (devc->sent_samples + send_now > devc->limit_samples) { | |
850 | send_now = devc->limit_samples - devc->sent_samples; | |
851 | logic->length = send_now * logic->unitsize; | |
852 | } | |
853 | if (!send_now) | |
854 | return; | |
855 | devc->sent_samples += send_now; | |
856 | } | |
857 | ||
858 | sr_session_send(sdi, packet); | |
859 | } | |
860 | ||
85c032e4 GS |
861 | /* |
862 | * This size translates to: event count (1K events per cluster), times | |
863 | * the sample width (unitsize, 16bits per event), times the maximum | |
864 | * number of samples per event. | |
865 | */ | |
866 | #define SAMPLES_BUFFER_SIZE (1024 * 2 * 4) | |
867 | ||
23239b5c MV |
868 | static void sigma_decode_dram_cluster(struct sigma_dram_cluster *dram_cluster, |
869 | unsigned int events_in_cluster, | |
1e23158b | 870 | unsigned int triggered, |
23239b5c MV |
871 | struct sr_dev_inst *sdi) |
872 | { | |
873 | struct dev_context *devc = sdi->priv; | |
874 | struct sigma_state *ss = &devc->state; | |
875 | struct sr_datafeed_packet packet; | |
876 | struct sr_datafeed_logic logic; | |
85c032e4 GS |
877 | uint16_t tsdiff, ts, sample, item16; |
878 | uint8_t samples[SAMPLES_BUFFER_SIZE]; | |
879 | uint8_t *send_ptr; | |
880 | size_t send_count, trig_count; | |
23239b5c | 881 | unsigned int i; |
85c032e4 | 882 | int j; |
23239b5c | 883 | |
23239b5c MV |
884 | ts = sigma_dram_cluster_ts(dram_cluster); |
885 | tsdiff = ts - ss->lastts; | |
a44b3b3f | 886 | ss->lastts = ts + EVENTS_PER_CLUSTER; |
23239b5c MV |
887 | |
888 | packet.type = SR_DF_LOGIC; | |
889 | packet.payload = &logic; | |
890 | logic.unitsize = 2; | |
891 | logic.data = samples; | |
892 | ||
893 | /* | |
468f17f2 GS |
894 | * If this cluster is not adjacent to the previously received |
895 | * cluster, then send the appropriate number of samples with the | |
896 | * previous values to the sigrok session. This "decodes RLE". | |
23239b5c | 897 | */ |
a44b3b3f | 898 | for (ts = 0; ts < tsdiff; ts++) { |
23239b5c | 899 | i = ts % 1024; |
0498f743 | 900 | store_sr_sample(samples, i, ss->lastsample); |
23239b5c MV |
901 | |
902 | /* | |
903 | * If we have 1024 samples ready or we're at the | |
904 | * end of submitting the padding samples, submit | |
85c032e4 GS |
905 | * the packet to Sigrok. Since constant data is |
906 | * sent, duplication of data for rates above 50MHz | |
907 | * is simple. | |
23239b5c | 908 | */ |
a44b3b3f | 909 | if ((i == 1023) || (ts == tsdiff - 1)) { |
23239b5c | 910 | logic.length = (i + 1) * logic.unitsize; |
85c032e4 | 911 | for (j = 0; j < devc->samples_per_event; j++) |
735ed8a1 | 912 | sigma_session_send(sdi, &packet); |
23239b5c MV |
913 | } |
914 | } | |
915 | ||
916 | /* | |
917 | * Parse the samples in current cluster and prepare them | |
85c032e4 GS |
918 | * to be submitted to Sigrok. Cope with memory layouts that |
919 | * vary with the samplerate. | |
23239b5c | 920 | */ |
85c032e4 GS |
921 | send_ptr = &samples[0]; |
922 | send_count = 0; | |
0498f743 | 923 | sample = 0; |
23239b5c | 924 | for (i = 0; i < events_in_cluster; i++) { |
85c032e4 GS |
925 | item16 = sigma_dram_cluster_data(dram_cluster, i); |
926 | if (devc->cur_samplerate == SR_MHZ(200)) { | |
927 | sample = sigma_deinterlace_200mhz_data(item16, 0); | |
928 | store_sr_sample(samples, send_count++, sample); | |
929 | sample = sigma_deinterlace_200mhz_data(item16, 1); | |
930 | store_sr_sample(samples, send_count++, sample); | |
931 | sample = sigma_deinterlace_200mhz_data(item16, 2); | |
932 | store_sr_sample(samples, send_count++, sample); | |
933 | sample = sigma_deinterlace_200mhz_data(item16, 3); | |
934 | store_sr_sample(samples, send_count++, sample); | |
935 | } else if (devc->cur_samplerate == SR_MHZ(100)) { | |
936 | sample = sigma_deinterlace_100mhz_data(item16, 0); | |
937 | store_sr_sample(samples, send_count++, sample); | |
938 | sample = sigma_deinterlace_100mhz_data(item16, 1); | |
939 | store_sr_sample(samples, send_count++, sample); | |
940 | } else { | |
941 | sample = item16; | |
942 | store_sr_sample(samples, send_count++, sample); | |
943 | } | |
23239b5c MV |
944 | } |
945 | ||
de3f7acb GS |
946 | /* |
947 | * If a trigger position applies, then provide the datafeed with | |
948 | * the first part of data up to that position, then send the | |
949 | * trigger marker. | |
950 | */ | |
23239b5c | 951 | int trigger_offset = 0; |
1e23158b | 952 | if (triggered) { |
23239b5c MV |
953 | /* |
954 | * Trigger is not always accurate to sample because of | |
955 | * pipeline delay. However, it always triggers before | |
956 | * the actual event. We therefore look at the next | |
957 | * samples to pinpoint the exact position of the trigger. | |
958 | */ | |
959 | trigger_offset = get_trigger_offset(samples, | |
960 | ss->lastsample, &devc->trigger); | |
961 | ||
962 | if (trigger_offset > 0) { | |
85c032e4 | 963 | trig_count = trigger_offset * devc->samples_per_event; |
23239b5c | 964 | packet.type = SR_DF_LOGIC; |
85c032e4 | 965 | logic.length = trig_count * logic.unitsize; |
735ed8a1 | 966 | sigma_session_send(sdi, &packet); |
85c032e4 GS |
967 | send_ptr += trig_count * logic.unitsize; |
968 | send_count -= trig_count; | |
23239b5c MV |
969 | } |
970 | ||
971 | /* Only send trigger if explicitly enabled. */ | |
0fa71943 UH |
972 | if (devc->use_triggers) |
973 | std_session_send_df_trigger(sdi); | |
23239b5c MV |
974 | } |
975 | ||
de3f7acb GS |
976 | /* |
977 | * Send the data after the trigger, or all of the received data | |
978 | * if no trigger position applies. | |
979 | */ | |
85c032e4 | 980 | if (send_count) { |
23239b5c | 981 | packet.type = SR_DF_LOGIC; |
85c032e4 GS |
982 | logic.length = send_count * logic.unitsize; |
983 | logic.data = send_ptr; | |
735ed8a1 | 984 | sigma_session_send(sdi, &packet); |
23239b5c MV |
985 | } |
986 | ||
0498f743 | 987 | ss->lastsample = sample; |
23239b5c MV |
988 | } |
989 | ||
28a35d8a | 990 | /* |
fefa1800 UH |
991 | * Decode chunk of 1024 bytes, 64 clusters, 7 events per cluster. |
992 | * Each event is 20ns apart, and can contain multiple samples. | |
f78898e9 HE |
993 | * |
994 | * For 200 MHz, events contain 4 samples for each channel, spread 5 ns apart. | |
995 | * For 100 MHz, events contain 2 samples for each channel, spread 10 ns apart. | |
996 | * For 50 MHz and below, events contain one sample for each channel, | |
997 | * spread 20 ns apart. | |
28a35d8a | 998 | */ |
1e23158b MV |
999 | static int decode_chunk_ts(struct sigma_dram_line *dram_line, |
1000 | uint16_t events_in_line, | |
1001 | uint32_t trigger_event, | |
102f1239 | 1002 | struct sr_dev_inst *sdi) |
28a35d8a | 1003 | { |
3628074d | 1004 | struct sigma_dram_cluster *dram_cluster; |
f06fb3e9 GS |
1005 | struct dev_context *devc; |
1006 | unsigned int clusters_in_line; | |
5fc01191 | 1007 | unsigned int events_in_cluster; |
23239b5c | 1008 | unsigned int i; |
f06fb3e9 GS |
1009 | uint32_t trigger_cluster, triggered; |
1010 | ||
1011 | devc = sdi->priv; | |
1012 | clusters_in_line = events_in_line; | |
1013 | clusters_in_line += EVENTS_PER_CLUSTER - 1; | |
1014 | clusters_in_line /= EVENTS_PER_CLUSTER; | |
1015 | trigger_cluster = ~0; | |
1016 | triggered = 0; | |
ee492173 | 1017 | |
4ae1f451 | 1018 | /* Check if trigger is in this chunk. */ |
1e23158b MV |
1019 | if (trigger_event < (64 * 7)) { |
1020 | if (devc->cur_samplerate <= SR_MHZ(50)) { | |
1021 | trigger_event -= MIN(EVENTS_PER_CLUSTER - 1, | |
1022 | trigger_event); | |
1023 | } | |
57bbf56b | 1024 | |
f3f19d11 | 1025 | /* Find in which cluster the trigger occurred. */ |
1e23158b | 1026 | trigger_cluster = trigger_event / EVENTS_PER_CLUSTER; |
ee492173 | 1027 | } |
28a35d8a | 1028 | |
5fc01191 MV |
1029 | /* For each full DRAM cluster. */ |
1030 | for (i = 0; i < clusters_in_line; i++) { | |
3628074d | 1031 | dram_cluster = &dram_line->cluster[i]; |
5fc01191 | 1032 | |
5fc01191 | 1033 | /* The last cluster might not be full. */ |
23239b5c MV |
1034 | if ((i == clusters_in_line - 1) && |
1035 | (events_in_line % EVENTS_PER_CLUSTER)) { | |
5fc01191 | 1036 | events_in_cluster = events_in_line % EVENTS_PER_CLUSTER; |
23239b5c | 1037 | } else { |
5fc01191 | 1038 | events_in_cluster = EVENTS_PER_CLUSTER; |
abda62ce | 1039 | } |
ee492173 | 1040 | |
1e23158b MV |
1041 | triggered = (i == trigger_cluster); |
1042 | sigma_decode_dram_cluster(dram_cluster, events_in_cluster, | |
1043 | triggered, sdi); | |
28a35d8a HE |
1044 | } |
1045 | ||
e46b8fb1 | 1046 | return SR_OK; |
28a35d8a HE |
1047 | } |
1048 | ||
6057d9fa | 1049 | static int download_capture(struct sr_dev_inst *sdi) |
28a35d8a | 1050 | { |
e15e5873 | 1051 | const uint32_t chunks_per_read = 32; |
f06fb3e9 GS |
1052 | |
1053 | struct dev_context *devc; | |
fd830beb | 1054 | struct sigma_dram_line *dram_line; |
c6648b66 | 1055 | int bufsz; |
462fe786 | 1056 | uint32_t stoppos, triggerpos; |
6057d9fa | 1057 | uint8_t modestatus; |
c6648b66 MV |
1058 | uint32_t i; |
1059 | uint32_t dl_lines_total, dl_lines_curr, dl_lines_done; | |
74d453ab | 1060 | uint32_t dl_first_line, dl_line; |
f06fb3e9 GS |
1061 | uint32_t dl_events_in_line; |
1062 | uint32_t trg_line, trg_event; | |
1063 | ||
1064 | devc = sdi->priv; | |
1065 | dl_events_in_line = 64 * 7; | |
c6648b66 | 1066 | |
6868626b | 1067 | sr_info("Downloading sample data."); |
dde0175d | 1068 | devc->state.state = SIGMA_DOWNLOAD; |
6868626b | 1069 | |
22f64ed8 GS |
1070 | /* |
1071 | * Ask the hardware to stop data acquisition. Reception of the | |
1072 | * FORCESTOP request makes the hardware "disable RLE" (store | |
1073 | * clusters to DRAM regardless of whether pin state changes) and | |
1074 | * raise the POSTTRIGGERED flag. | |
1075 | */ | |
1076 | sigma_set_register(WRITE_MODE, WMR_FORCESTOP | WMR_SDRAMWRITEEN, devc); | |
1077 | do { | |
f73b00b6 | 1078 | if (sigma_read_register(READ_MODE, &modestatus, 1, devc) != 1) { |
bfa79fbd | 1079 | sr_err("failed while waiting for RMR_POSTTRIGGERED bit"); |
f73b00b6 DT |
1080 | return FALSE; |
1081 | } | |
22f64ed8 | 1082 | } while (!(modestatus & RMR_POSTTRIGGERED)); |
6057d9fa MV |
1083 | |
1084 | /* Set SDRAM Read Enable. */ | |
22f64ed8 | 1085 | sigma_set_register(WRITE_MODE, WMR_SDRAMREADEN, devc); |
6057d9fa MV |
1086 | |
1087 | /* Get the current position. */ | |
462fe786 | 1088 | sigma_read_pos(&stoppos, &triggerpos, devc); |
6057d9fa MV |
1089 | |
1090 | /* Check if trigger has fired. */ | |
f73b00b6 | 1091 | if (sigma_read_register(READ_MODE, &modestatus, 1, devc) != 1) { |
bfa79fbd | 1092 | sr_err("failed to read READ_MODE register"); |
f73b00b6 DT |
1093 | return FALSE; |
1094 | } | |
dc400817 GS |
1095 | trg_line = ~0; |
1096 | trg_event = ~0; | |
22f64ed8 | 1097 | if (modestatus & RMR_TRIGGERED) { |
c6648b66 | 1098 | trg_line = triggerpos >> 9; |
1e23158b MV |
1099 | trg_event = triggerpos & 0x1ff; |
1100 | } | |
6057d9fa | 1101 | |
735ed8a1 GS |
1102 | devc->sent_samples = 0; |
1103 | ||
c6648b66 | 1104 | /* |
74d453ab GS |
1105 | * Determine how many "DRAM lines" of 1024 bytes each we need to |
1106 | * retrieve from the Sigma hardware, so that we have a complete | |
1107 | * set of samples. Note that the last line need not contain 64 | |
1108 | * clusters, it might be partially filled only. | |
1109 | * | |
1110 | * When RMR_ROUND is set, the circular buffer in DRAM has wrapped | |
1111 | * around. Since the status of the very next line is uncertain in | |
1112 | * that case, we skip it and start reading from the next line. The | |
1113 | * circular buffer has 32K lines (0x8000). | |
c6648b66 MV |
1114 | */ |
1115 | dl_lines_total = (stoppos >> 9) + 1; | |
74d453ab GS |
1116 | if (modestatus & RMR_ROUND) { |
1117 | dl_first_line = dl_lines_total + 1; | |
1118 | dl_lines_total = 0x8000 - 2; | |
1119 | } else { | |
1120 | dl_first_line = 0; | |
1121 | } | |
44081095 DT |
1122 | dram_line = g_try_malloc0(chunks_per_read * sizeof(*dram_line)); |
1123 | if (!dram_line) | |
1124 | return FALSE; | |
c6648b66 | 1125 | dl_lines_done = 0; |
c6648b66 MV |
1126 | while (dl_lines_total > dl_lines_done) { |
1127 | /* We can download only up-to 32 DRAM lines in one go! */ | |
547c4cdc | 1128 | dl_lines_curr = MIN(chunks_per_read, dl_lines_total - dl_lines_done); |
6868626b | 1129 | |
74d453ab GS |
1130 | dl_line = dl_first_line + dl_lines_done; |
1131 | dl_line %= 0x8000; | |
1132 | bufsz = sigma_read_dram(dl_line, dl_lines_curr, | |
f41a4cae | 1133 | (uint8_t *)dram_line, devc); |
c6648b66 MV |
1134 | /* TODO: Check bufsz. For now, just avoid compiler warnings. */ |
1135 | (void)bufsz; | |
6868626b | 1136 | |
c6648b66 MV |
1137 | /* This is the first DRAM line, so find the initial timestamp. */ |
1138 | if (dl_lines_done == 0) { | |
3513d965 MV |
1139 | devc->state.lastts = |
1140 | sigma_dram_cluster_ts(&dram_line[0].cluster[0]); | |
c6648b66 | 1141 | devc->state.lastsample = 0; |
6868626b BV |
1142 | } |
1143 | ||
c6648b66 | 1144 | for (i = 0; i < dl_lines_curr; i++) { |
1e23158b | 1145 | uint32_t trigger_event = ~0; |
c6648b66 MV |
1146 | /* The last "DRAM line" can be only partially full. */ |
1147 | if (dl_lines_done + i == dl_lines_total - 1) | |
46641fac | 1148 | dl_events_in_line = stoppos & 0x1ff; |
c6648b66 | 1149 | |
e69ad48e | 1150 | /* Test if the trigger happened on this line. */ |
c6648b66 | 1151 | if (dl_lines_done + i == trg_line) |
1e23158b | 1152 | trigger_event = trg_event; |
e69ad48e | 1153 | |
1e23158b MV |
1154 | decode_chunk_ts(dram_line + i, dl_events_in_line, |
1155 | trigger_event, sdi); | |
c6648b66 | 1156 | } |
6868626b | 1157 | |
c6648b66 | 1158 | dl_lines_done += dl_lines_curr; |
6868626b | 1159 | } |
dde0175d | 1160 | g_free(dram_line); |
6868626b | 1161 | |
bee2b016 | 1162 | std_session_send_df_end(sdi); |
6057d9fa | 1163 | |
dde0175d | 1164 | devc->state.state = SIGMA_IDLE; |
d2f7c417 | 1165 | sr_dev_acquisition_stop(sdi); |
6057d9fa MV |
1166 | |
1167 | return TRUE; | |
6868626b BV |
1168 | } |
1169 | ||
d4051930 | 1170 | /* |
74d453ab GS |
1171 | * Periodically check the Sigma status when in CAPTURE mode. This routine |
1172 | * checks whether the configured sample count or sample time have passed, | |
1173 | * and will stop acquisition and download the acquired samples. | |
d4051930 MV |
1174 | */ |
1175 | static int sigma_capture_mode(struct sr_dev_inst *sdi) | |
6868626b | 1176 | { |
f06fb3e9 | 1177 | struct dev_context *devc; |
94ba4bd6 | 1178 | uint64_t running_msec; |
2f425a56 | 1179 | uint64_t current_time; |
28a35d8a | 1180 | |
f06fb3e9 GS |
1181 | devc = sdi->priv; |
1182 | ||
74d453ab GS |
1183 | /* |
1184 | * Check if the selected sampling duration passed. Sample count | |
1185 | * limits are covered by this enforced timeout as well. | |
1186 | */ | |
2f425a56 GS |
1187 | current_time = g_get_monotonic_time(); |
1188 | running_msec = (current_time - devc->start_time) / 1000; | |
00c86508 | 1189 | if (running_msec >= devc->limit_msec) |
6057d9fa | 1190 | return download_capture(sdi); |
00c86508 | 1191 | |
d4051930 MV |
1192 | return TRUE; |
1193 | } | |
28a35d8a | 1194 | |
3ba56876 | 1195 | SR_PRIV int sigma_receive_data(int fd, int revents, void *cb_data) |
d4051930 MV |
1196 | { |
1197 | struct sr_dev_inst *sdi; | |
1198 | struct dev_context *devc; | |
88c51afe | 1199 | |
d4051930 MV |
1200 | (void)fd; |
1201 | (void)revents; | |
88c51afe | 1202 | |
d4051930 MV |
1203 | sdi = cb_data; |
1204 | devc = sdi->priv; | |
1205 | ||
1206 | if (devc->state.state == SIGMA_IDLE) | |
1207 | return TRUE; | |
1208 | ||
dde0175d GS |
1209 | /* |
1210 | * When the application has requested to stop the acquisition, | |
1211 | * then immediately start downloading sample data. Otherwise | |
1212 | * keep checking configured limits which will terminate the | |
1213 | * acquisition and initiate download. | |
1214 | */ | |
1215 | if (devc->state.state == SIGMA_STOPPING) | |
1216 | return download_capture(sdi); | |
d4051930 MV |
1217 | if (devc->state.state == SIGMA_CAPTURE) |
1218 | return sigma_capture_mode(sdi); | |
28a35d8a | 1219 | |
28a35d8a HE |
1220 | return TRUE; |
1221 | } | |
1222 | ||
c53d793f HE |
1223 | /* Build a LUT entry used by the trigger functions. */ |
1224 | static void build_lut_entry(uint16_t value, uint16_t mask, uint16_t *entry) | |
ee492173 HE |
1225 | { |
1226 | int i, j, k, bit; | |
1227 | ||
ba7dd8bb | 1228 | /* For each quad channel. */ |
0a1f7b09 | 1229 | for (i = 0; i < 4; i++) { |
c53d793f | 1230 | entry[i] = 0xffff; |
ee492173 | 1231 | |
f758d074 | 1232 | /* For each bit in LUT. */ |
0a1f7b09 | 1233 | for (j = 0; j < 16; j++) |
ee492173 | 1234 | |
ba7dd8bb | 1235 | /* For each channel in quad. */ |
0a1f7b09 | 1236 | for (k = 0; k < 4; k++) { |
ee492173 HE |
1237 | bit = 1 << (i * 4 + k); |
1238 | ||
c53d793f | 1239 | /* Set bit in entry */ |
0a1f7b09 UH |
1240 | if ((mask & bit) && ((!(value & bit)) != |
1241 | (!(j & (1 << k))))) | |
c53d793f | 1242 | entry[i] &= ~(1 << j); |
ee492173 HE |
1243 | } |
1244 | } | |
c53d793f | 1245 | } |
ee492173 | 1246 | |
c53d793f HE |
1247 | /* Add a logical function to LUT mask. */ |
1248 | static void add_trigger_function(enum triggerop oper, enum triggerfunc func, | |
1249 | int index, int neg, uint16_t *mask) | |
1250 | { | |
1251 | int i, j; | |
1252 | int x[2][2], tmp, a, b, aset, bset, rset; | |
1253 | ||
1254 | memset(x, 0, 4 * sizeof(int)); | |
1255 | ||
1256 | /* Trigger detect condition. */ | |
1257 | switch (oper) { | |
1258 | case OP_LEVEL: | |
1259 | x[0][1] = 1; | |
1260 | x[1][1] = 1; | |
1261 | break; | |
1262 | case OP_NOT: | |
1263 | x[0][0] = 1; | |
1264 | x[1][0] = 1; | |
1265 | break; | |
1266 | case OP_RISE: | |
1267 | x[0][1] = 1; | |
1268 | break; | |
1269 | case OP_FALL: | |
1270 | x[1][0] = 1; | |
1271 | break; | |
1272 | case OP_RISEFALL: | |
1273 | x[0][1] = 1; | |
1274 | x[1][0] = 1; | |
1275 | break; | |
1276 | case OP_NOTRISE: | |
1277 | x[1][1] = 1; | |
1278 | x[0][0] = 1; | |
1279 | x[1][0] = 1; | |
1280 | break; | |
1281 | case OP_NOTFALL: | |
1282 | x[1][1] = 1; | |
1283 | x[0][0] = 1; | |
1284 | x[0][1] = 1; | |
1285 | break; | |
1286 | case OP_NOTRISEFALL: | |
1287 | x[1][1] = 1; | |
1288 | x[0][0] = 1; | |
1289 | break; | |
1290 | } | |
1291 | ||
1292 | /* Transpose if neg is set. */ | |
1293 | if (neg) { | |
0a1f7b09 UH |
1294 | for (i = 0; i < 2; i++) { |
1295 | for (j = 0; j < 2; j++) { | |
c53d793f | 1296 | tmp = x[i][j]; |
0a1f7b09 UH |
1297 | x[i][j] = x[1 - i][1 - j]; |
1298 | x[1 - i][1 - j] = tmp; | |
c53d793f | 1299 | } |
ea9cfed7 | 1300 | } |
c53d793f HE |
1301 | } |
1302 | ||
1303 | /* Update mask with function. */ | |
0a1f7b09 | 1304 | for (i = 0; i < 16; i++) { |
c53d793f HE |
1305 | a = (i >> (2 * index + 0)) & 1; |
1306 | b = (i >> (2 * index + 1)) & 1; | |
1307 | ||
1308 | aset = (*mask >> i) & 1; | |
1309 | bset = x[b][a]; | |
1310 | ||
382cb19f | 1311 | rset = 0; |
c53d793f HE |
1312 | if (func == FUNC_AND || func == FUNC_NAND) |
1313 | rset = aset & bset; | |
1314 | else if (func == FUNC_OR || func == FUNC_NOR) | |
1315 | rset = aset | bset; | |
1316 | else if (func == FUNC_XOR || func == FUNC_NXOR) | |
1317 | rset = aset ^ bset; | |
1318 | ||
1319 | if (func == FUNC_NAND || func == FUNC_NOR || func == FUNC_NXOR) | |
1320 | rset = !rset; | |
1321 | ||
1322 | *mask &= ~(1 << i); | |
1323 | ||
1324 | if (rset) | |
1325 | *mask |= 1 << i; | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | /* | |
1330 | * Build trigger LUTs used by 50 MHz and lower sample rates for supporting | |
1331 | * simple pin change and state triggers. Only two transitions (rise/fall) can be | |
1332 | * set at any time, but a full mask and value can be set (0/1). | |
1333 | */ | |
3ba56876 | 1334 | SR_PRIV int sigma_build_basic_trigger(struct triggerlut *lut, struct dev_context *devc) |
c53d793f HE |
1335 | { |
1336 | int i,j; | |
4ae1f451 | 1337 | uint16_t masks[2] = { 0, 0 }; |
c53d793f HE |
1338 | |
1339 | memset(lut, 0, sizeof(struct triggerlut)); | |
1340 | ||
f3f19d11 | 1341 | /* Constant for simple triggers. */ |
c53d793f HE |
1342 | lut->m4 = 0xa000; |
1343 | ||
1344 | /* Value/mask trigger support. */ | |
0e1357e8 | 1345 | build_lut_entry(devc->trigger.simplevalue, devc->trigger.simplemask, |
99965709 | 1346 | lut->m2d); |
c53d793f HE |
1347 | |
1348 | /* Rise/fall trigger support. */ | |
0a1f7b09 | 1349 | for (i = 0, j = 0; i < 16; i++) { |
0e1357e8 BV |
1350 | if (devc->trigger.risingmask & (1 << i) || |
1351 | devc->trigger.fallingmask & (1 << i)) | |
c53d793f HE |
1352 | masks[j++] = 1 << i; |
1353 | } | |
1354 | ||
1355 | build_lut_entry(masks[0], masks[0], lut->m0d); | |
1356 | build_lut_entry(masks[1], masks[1], lut->m1d); | |
1357 | ||
1358 | /* Add glue logic */ | |
1359 | if (masks[0] || masks[1]) { | |
1360 | /* Transition trigger. */ | |
0e1357e8 | 1361 | if (masks[0] & devc->trigger.risingmask) |
c53d793f | 1362 | add_trigger_function(OP_RISE, FUNC_OR, 0, 0, &lut->m3); |
0e1357e8 | 1363 | if (masks[0] & devc->trigger.fallingmask) |
c53d793f | 1364 | add_trigger_function(OP_FALL, FUNC_OR, 0, 0, &lut->m3); |
0e1357e8 | 1365 | if (masks[1] & devc->trigger.risingmask) |
c53d793f | 1366 | add_trigger_function(OP_RISE, FUNC_OR, 1, 0, &lut->m3); |
0e1357e8 | 1367 | if (masks[1] & devc->trigger.fallingmask) |
c53d793f HE |
1368 | add_trigger_function(OP_FALL, FUNC_OR, 1, 0, &lut->m3); |
1369 | } else { | |
1370 | /* Only value/mask trigger. */ | |
1371 | lut->m3 = 0xffff; | |
1372 | } | |
ee492173 | 1373 | |
c53d793f | 1374 | /* Triggertype: event. */ |
ee492173 HE |
1375 | lut->params.selres = 3; |
1376 | ||
e46b8fb1 | 1377 | return SR_OK; |
ee492173 | 1378 | } |