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Commit | Line | Data |
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08c41387 | 1 | ## |
ada4c3a3 | 2 | ## This file is part of the libsigrokdecode project. |
08c41387 | 3 | ## |
624710c9 | 4 | ## Copyright (C) 2015-2020 Uwe Hermann <uwe@hermann-uwe.de> |
08c41387 UH |
5 | ## |
6 | ## This program is free software; you can redistribute it and/or modify | |
7 | ## it under the terms of the GNU General Public License as published by | |
8 | ## the Free Software Foundation; either version 2 of the License, or | |
9 | ## (at your option) any later version. | |
10 | ## | |
11 | ## This program is distributed in the hope that it will be useful, | |
12 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ## GNU General Public License for more details. | |
15 | ## | |
16 | ## You should have received a copy of the GNU General Public License | |
4539e9ca | 17 | ## along with this program; if not, see <http://www.gnu.org/licenses/>. |
08c41387 UH |
18 | ## |
19 | ||
20 | import sigrokdecode as srd | |
9f08e757 | 21 | from common.srdhelper import SrdIntEnum, SrdStrEnum |
135b790c | 22 | from common.sdcard import (cmd_names, acmd_names, accepted_voltages, card_status, sd_status) |
08c41387 | 23 | |
6266715a | 24 | responses = '1 1b 2 3 6 7'.split() |
b13f3595 | 25 | reg_cid = 'MID OID PNM PRV PSN RSVD MDT CRC ONE'.split() |
6266715a | 26 | |
a32575cd UH |
27 | Pin = SrdIntEnum.from_str('Pin', 'CMD CLK DAT0 DAT1 DAT2 DAT3') |
28 | ||
9f08e757 | 29 | a = ['CMD%d' % i for i in range(64)] + ['ACMD%d' % i for i in range(64)] + \ |
604b5f9d | 30 | ['RESPONSE_R' + r.upper() for r in responses] + \ |
b13f3595 | 31 | ['R_CID_' + r for r in reg_cid] + \ |
9f08e757 UH |
32 | ['F_' + f for f in 'START TRANSM CMD ARG CRC END'.split()] + \ |
33 | ['BIT', 'DECODED_BIT', 'DECODED_F'] | |
34 | Ann = SrdIntEnum.from_list('Ann', a) | |
35 | ||
624710c9 UH |
36 | s = ['GET_COMMAND_TOKEN', 'HANDLE_CMD999'] + \ |
37 | ['HANDLE_CMD%d' % i for i in range(64)] + \ | |
38 | ['HANDLE_ACMD%d' % i for i in range(64)] + \ | |
6266715a | 39 | ['GET_RESPONSE_R%s' % r.upper() for r in responses] |
624710c9 UH |
40 | St = SrdStrEnum.from_list('St', s) |
41 | ||
07da8a9b UH |
42 | class Bit: |
43 | def __init__(self, s, e, b): | |
44 | self.ss, self.es, self.bit = s, e ,b | |
45 | ||
08c41387 | 46 | class Decoder(srd.Decoder): |
11535843 | 47 | api_version = 3 |
08c41387 UH |
48 | id = 'sdcard_sd' |
49 | name = 'SD card (SD mode)' | |
50 | longname = 'Secure Digital card (SD mode)' | |
51 | desc = 'Secure Digital card (SD mode) low-level protocol.' | |
52 | license = 'gplv2+' | |
53 | inputs = ['logic'] | |
6cbba91f | 54 | outputs = [] |
d6d8a8a4 | 55 | tags = ['Memory'] |
08c41387 UH |
56 | channels = ( |
57 | {'id': 'cmd', 'name': 'CMD', 'desc': 'Command'}, | |
58 | {'id': 'clk', 'name': 'CLK', 'desc': 'Clock'}, | |
59 | ) | |
60 | optional_channels = ( | |
61 | {'id': 'dat0', 'name': 'DAT0', 'desc': 'Data pin 0'}, | |
62 | {'id': 'dat1', 'name': 'DAT1', 'desc': 'Data pin 1'}, | |
63 | {'id': 'dat2', 'name': 'DAT2', 'desc': 'Data pin 2'}, | |
64 | {'id': 'dat3', 'name': 'DAT3', 'desc': 'Data pin 3'}, | |
65 | ) | |
66 | annotations = \ | |
67 | tuple(('cmd%d' % i, 'CMD%d' % i) for i in range(64)) + \ | |
6266715a | 68 | tuple(('acmd%d' % i, 'ACMD%d' % i) for i in range(64)) + \ |
b13f3595 UH |
69 | tuple(('response_r%s' % r, 'R%s' % r) for r in responses) + \ |
70 | tuple(('reg_cid_' + r.lower(), 'CID: ' + r) for r in reg_cid) + \ | |
71 | ( \ | |
08c41387 UH |
72 | ('field-start', 'Start bit'), |
73 | ('field-transmission', 'Transmission bit'), | |
74 | ('field-cmd', 'Command'), | |
75 | ('field-arg', 'Argument'), | |
76 | ('field-crc', 'CRC'), | |
77 | ('field-end', 'End bit'), | |
9f08e757 | 78 | ('bit', 'Bit'), |
e144452b UH |
79 | ('decoded-bit', 'Decoded bit'), |
80 | ('decoded-field', 'Decoded field'), | |
08c41387 UH |
81 | ) |
82 | annotation_rows = ( | |
9f08e757 | 83 | ('raw-bits', 'Raw bits', (Ann.BIT,)), |
b13f3595 | 84 | ('decoded-bits', 'Decoded bits', (Ann.DECODED_BIT,) + Ann.prefixes('R_')), |
9f08e757 UH |
85 | ('decoded-fields', 'Decoded fields', (Ann.DECODED_F,)), |
86 | ('fields', 'Fields', Ann.prefixes('F_')), | |
604b5f9d | 87 | ('commands', 'Commands', Ann.prefixes('CMD ACMD RESPONSE_')), |
08c41387 UH |
88 | ) |
89 | ||
92b7b49f | 90 | def __init__(self): |
10aeb8ea GS |
91 | self.reset() |
92 | ||
93 | def reset(self): | |
624710c9 | 94 | self.state = St.GET_COMMAND_TOKEN |
08c41387 | 95 | self.token = [] |
08c41387 UH |
96 | self.is_acmd = False # Indicates CMD vs. ACMD |
97 | self.cmd = None | |
f8eb6c3f | 98 | self.last_cmd = None |
08c41387 UH |
99 | self.arg = None |
100 | ||
101 | def start(self): | |
102 | self.out_ann = self.register(srd.OUTPUT_ANN) | |
103 | ||
104 | def putbit(self, b, data): | |
07da8a9b | 105 | self.put(self.token[b].ss, self.token[b].es, self.out_ann, |
9f08e757 | 106 | [Ann.DECODED_BIT, data]) |
08c41387 UH |
107 | |
108 | def putt(self, data): | |
07da8a9b | 109 | self.put(self.token[0].ss, self.token[47].es, self.out_ann, data) |
08c41387 | 110 | |
08c41387 | 111 | def putf(self, s, e, data): |
07da8a9b | 112 | self.put(self.token[s].ss, self.token[e].es, self.out_ann, data) |
08c41387 UH |
113 | |
114 | def puta(self, s, e, data): | |
07da8a9b | 115 | self.put(self.token[47 - 8 - e].ss, self.token[47 - 8 - s].es, |
08c41387 UH |
116 | self.out_ann, data) |
117 | ||
0671a9de | 118 | def putc(self, desc): |
608b9c03 | 119 | cmd = Ann.ACMD0 + self.cmd if self.is_acmd else self.cmd |
f8eb6c3f | 120 | self.last_cmd = cmd |
08c41387 UH |
121 | self.putt([cmd, ['%s: %s' % (self.cmd_str, desc), self.cmd_str, |
122 | self.cmd_str.split(' ')[0]]]) | |
123 | ||
6266715a | 124 | def putr(self, r): |
604b5f9d | 125 | self.putt([r, ['Response: %s' % r.name.split('_')[1]]]) |
08c41387 | 126 | |
08c41387 UH |
127 | def cmd_name(self, cmd): |
128 | c = acmd_names if self.is_acmd else cmd_names | |
129 | return c.get(cmd, 'Unknown') | |
130 | ||
4dfde5a5 | 131 | def get_token_bits(self, cmd_pin, n): |
08c41387 | 132 | # Get a bit, return True if we already got 'n' bits, False otherwise. |
07da8a9b | 133 | self.token.append(Bit(self.samplenum, self.samplenum, cmd_pin)) |
08c41387 | 134 | if len(self.token) > 0: |
07da8a9b | 135 | self.token[len(self.token) - 2].es = self.samplenum |
08c41387 UH |
136 | if len(self.token) < n: |
137 | return False | |
07da8a9b | 138 | self.token[n - 1].es += self.token[n - 1].ss - self.token[n - 2].ss |
08c41387 UH |
139 | return True |
140 | ||
141 | def handle_common_token_fields(self): | |
142 | s = self.token | |
143 | ||
144 | # Annotations for each individual bit. | |
145 | for bit in range(len(self.token)): | |
07da8a9b | 146 | self.putf(bit, bit, [Ann.BIT, ['%d' % s[bit].bit]]) |
08c41387 UH |
147 | |
148 | # CMD[47:47]: Start bit (always 0) | |
9f08e757 | 149 | self.putf(0, 0, [Ann.F_START, ['Start bit', 'Start', 'S']]) |
08c41387 UH |
150 | |
151 | # CMD[46:46]: Transmission bit (1 == host) | |
07da8a9b | 152 | t = 'host' if s[1].bit == 1 else 'card' |
9f08e757 | 153 | self.putf(1, 1, [Ann.F_TRANSM, ['Transmission: ' + t, 'T: ' + t, 'T']]) |
08c41387 UH |
154 | |
155 | # CMD[45:40]: Command index (BCD; valid: 0-63) | |
07da8a9b | 156 | self.cmd = int('0b' + ''.join([str(s[i].bit) for i in range(2, 8)]), 2) |
08c41387 | 157 | c = '%s (%d)' % (self.cmd_name(self.cmd), self.cmd) |
9f08e757 | 158 | self.putf(2, 7, [Ann.F_CMD, ['Command: ' + c, 'Cmd: ' + c, |
08c41387 UH |
159 | 'CMD%d' % self.cmd, 'Cmd', 'C']]) |
160 | ||
161 | # CMD[39:08]: Argument | |
07da8a9b | 162 | self.arg = int('0b' + ''.join([str(s[i].bit) for i in range(8, 40)]), 2) |
9f08e757 | 163 | self.putf(8, 39, [Ann.F_ARG, ['Argument: 0x%08x' % self.arg, 'Arg', 'A']]) |
08c41387 UH |
164 | |
165 | # CMD[07:01]: CRC7 | |
07da8a9b | 166 | self.crc = int('0b' + ''.join([str(s[i].bit) for i in range(40, 47)]), 2) |
9f08e757 | 167 | self.putf(40, 46, [Ann.F_CRC, ['CRC: 0x%x' % self.crc, 'CRC', 'C']]) |
08c41387 UH |
168 | |
169 | # CMD[00:00]: End bit (always 1) | |
9f08e757 | 170 | self.putf(47, 47, [Ann.F_END, ['End bit', 'End', 'E']]) |
08c41387 | 171 | |
4dfde5a5 | 172 | def get_command_token(self, cmd_pin): |
08c41387 UH |
173 | # Command tokens (48 bits) are sent serially (MSB-first) by the host |
174 | # (over the CMD line), either to one SD card or to multiple ones. | |
175 | # | |
176 | # Format: | |
177 | # - Bits[47:47]: Start bit (always 0) | |
178 | # - Bits[46:46]: Transmission bit (1 == host) | |
179 | # - Bits[45:40]: Command index (BCD; valid: 0-63) | |
180 | # - Bits[39:08]: Argument | |
181 | # - Bits[07:01]: CRC7 | |
182 | # - Bits[00:00]: End bit (always 1) | |
183 | ||
4dfde5a5 | 184 | if not self.get_token_bits(cmd_pin, 48): |
08c41387 UH |
185 | return |
186 | ||
187 | self.handle_common_token_fields() | |
188 | ||
189 | # Handle command. | |
190 | s = 'ACMD' if self.is_acmd else 'CMD' | |
191 | self.cmd_str = '%s%d (%s)' % (s, self.cmd, self.cmd_name(self.cmd)) | |
1e9dfe60 | 192 | if hasattr(self, 'handle_%s%d' % (s.lower(), self.cmd)): |
624710c9 | 193 | self.state = St['HANDLE_CMD%d' % self.cmd] |
08c41387 | 194 | else: |
624710c9 | 195 | self.state = St.HANDLE_CMD999 |
0671a9de | 196 | self.putc('%s%d' % (s, self.cmd)) |
08c41387 UH |
197 | |
198 | def handle_cmd0(self): | |
199 | # CMD0 (GO_IDLE_STATE) -> no response | |
9f08e757 | 200 | self.puta(0, 31, [Ann.DECODED_F, ['Stuff bits', 'Stuff', 'SB', 'S']]) |
0671a9de | 201 | self.putc('Reset all SD cards') |
624710c9 | 202 | self.token, self.state = [], St.GET_COMMAND_TOKEN |
08c41387 UH |
203 | |
204 | def handle_cmd2(self): | |
205 | # CMD2 (ALL_SEND_CID) -> R2 | |
9f08e757 | 206 | self.puta(0, 31, [Ann.DECODED_F, ['Stuff bits', 'Stuff', 'SB', 'S']]) |
0671a9de | 207 | self.putc('Ask card for CID number') |
624710c9 | 208 | self.token, self.state = [], St.GET_RESPONSE_R2 |
08c41387 UH |
209 | |
210 | def handle_cmd3(self): | |
211 | # CMD3 (SEND_RELATIVE_ADDR) -> R6 | |
9f08e757 | 212 | self.puta(0, 31, [Ann.DECODED_F, ['Stuff bits', 'Stuff', 'SB', 'S']]) |
0671a9de | 213 | self.putc('Ask card for new relative card address (RCA)') |
624710c9 | 214 | self.token, self.state = [], St.GET_RESPONSE_R6 |
08c41387 UH |
215 | |
216 | def handle_cmd6(self): | |
217 | # CMD6 (SWITCH_FUNC) -> R1 | |
0671a9de | 218 | self.putc('Switch/check card function') |
624710c9 | 219 | self.token, self.state = [], St.GET_RESPONSE_R1 |
08c41387 UH |
220 | |
221 | def handle_cmd7(self): | |
222 | # CMD7 (SELECT/DESELECT_CARD) -> R1b | |
0671a9de | 223 | self.putc('Select / deselect card') |
624710c9 | 224 | self.token, self.state = [], St.GET_RESPONSE_R6 |
08c41387 UH |
225 | |
226 | def handle_cmd8(self): | |
227 | # CMD8 (SEND_IF_COND) -> R7 | |
9f08e757 UH |
228 | self.puta(12, 31, [Ann.DECODED_F, ['Reserved', 'Res', 'R']]) |
229 | self.puta(8, 11, [Ann.DECODED_F, ['Supply voltage', 'Voltage', 'VHS', 'V']]) | |
230 | self.puta(0, 7, [Ann.DECODED_F, ['Check pattern', 'Check pat', 'Check', 'C']]) | |
0671a9de | 231 | self.putc('Send interface condition to card') |
624710c9 | 232 | self.token, self.state = [], St.GET_RESPONSE_R7 |
08c41387 UH |
233 | # TODO: Handle case when card doesn't reply with R7 (no reply at all). |
234 | ||
235 | def handle_cmd9(self): | |
236 | # CMD9 (SEND_CSD) -> R2 | |
9f08e757 UH |
237 | self.puta(16, 31, [Ann.DECODED_F, ['RCA', 'R']]) |
238 | self.puta(0, 15, [Ann.DECODED_F, ['Stuff bits', 'Stuff', 'SB', 'S']]) | |
0671a9de | 239 | self.putc('Send card-specific data (CSD)') |
624710c9 | 240 | self.token, self.state = [], St.GET_RESPONSE_R2 |
08c41387 UH |
241 | |
242 | def handle_cmd10(self): | |
243 | # CMD10 (SEND_CID) -> R2 | |
9f08e757 UH |
244 | self.puta(16, 31, [Ann.DECODED_F, ['RCA', 'R']]) |
245 | self.puta(0, 15, [Ann.DECODED_F, ['Stuff bits', 'Stuff', 'SB', 'S']]) | |
0671a9de | 246 | self.putc('Send card identification data (CID)') |
624710c9 | 247 | self.token, self.state = [], St.GET_RESPONSE_R2 |
08c41387 UH |
248 | |
249 | def handle_cmd13(self): | |
250 | # CMD13 (SEND_STATUS) -> R1 | |
9f08e757 UH |
251 | self.puta(16, 31, [Ann.DECODED_F, ['RCA', 'R']]) |
252 | self.puta(0, 15, [Ann.DECODED_F, ['Stuff bits', 'Stuff', 'SB', 'S']]) | |
0671a9de | 253 | self.putc('Send card status register') |
624710c9 | 254 | self.token, self.state = [], St.GET_RESPONSE_R1 |
08c41387 UH |
255 | |
256 | def handle_cmd16(self): | |
257 | # CMD16 (SET_BLOCKLEN) -> R1 | |
9f08e757 | 258 | self.puta(0, 31, [Ann.DECODED_F, ['Block length', 'Blocklen', 'BL', 'B']]) |
0671a9de | 259 | self.putc('Set the block length to %d bytes' % self.arg) |
624710c9 | 260 | self.token, self.state = [], St.GET_RESPONSE_R1 |
08c41387 UH |
261 | |
262 | def handle_cmd55(self): | |
263 | # CMD55 (APP_CMD) -> R1 | |
9f08e757 UH |
264 | self.puta(16, 31, [Ann.DECODED_F, ['RCA', 'R']]) |
265 | self.puta(0, 15, [Ann.DECODED_F, ['Stuff bits', 'Stuff', 'SB', 'S']]) | |
0671a9de | 266 | self.putc('Next command is an application-specific command') |
08c41387 | 267 | self.is_acmd = True |
624710c9 | 268 | self.token, self.state = [], St.GET_RESPONSE_R1 |
08c41387 UH |
269 | |
270 | def handle_acmd6(self): | |
271 | # ACMD6 (SET_BUS_WIDTH) -> R1 | |
0671a9de | 272 | self.putc('Read SD config register (SCR)') |
624710c9 | 273 | self.token, self.state = [], St.GET_RESPONSE_R1 |
08c41387 UH |
274 | |
275 | def handle_acmd13(self): | |
276 | # ACMD13 (SD_STATUS) -> R1 | |
9f08e757 | 277 | self.puta(0, 31, [Ann.DECODED_F, ['Stuff bits', 'Stuff', 'SB', 'S']]) |
0671a9de | 278 | self.putc('Set SD status') |
624710c9 | 279 | self.token, self.state = [], St.GET_RESPONSE_R1 |
08c41387 UH |
280 | |
281 | def handle_acmd41(self): | |
282 | # ACMD41 (SD_SEND_OP_COND) -> R3 | |
9f08e757 UH |
283 | self.puta(0, 23, [Ann.DECODED_F, |
284 | ['VDD voltage window', 'VDD volt', 'VDD', 'V']]) | |
285 | self.puta(24, 24, [Ann.DECODED_F, ['S18R']]) | |
286 | self.puta(25, 27, [Ann.DECODED_F, ['Reserved', 'Res', 'R']]) | |
287 | self.puta(28, 28, [Ann.DECODED_F, ['XPC']]) | |
288 | self.puta(29, 29, [Ann.DECODED_F, | |
289 | ['Reserved for eSD', 'Reserved', 'Res', 'R']]) | |
290 | self.puta(30, 30, [Ann.DECODED_F, | |
291 | ['Host capacity support info', 'Host capacity', 'HCS', 'H']]) | |
292 | self.puta(31, 31, [Ann.DECODED_F, ['Reserved', 'Res', 'R']]) | |
0671a9de | 293 | self.putc('Send HCS info and activate the card init process') |
624710c9 | 294 | self.token, self.state = [], St.GET_RESPONSE_R3 |
08c41387 UH |
295 | |
296 | def handle_acmd51(self): | |
297 | # ACMD51 (SEND_SCR) -> R1 | |
0671a9de | 298 | self.putc('Read SD config register (SCR)') |
624710c9 | 299 | self.token, self.state = [], St.GET_RESPONSE_R1 |
08c41387 UH |
300 | |
301 | def handle_cmd999(self): | |
624710c9 | 302 | self.token, self.state = [], St.GET_RESPONSE_R1 |
08c41387 UH |
303 | |
304 | def handle_acmd999(self): | |
624710c9 | 305 | self.token, self.state = [], St.GET_RESPONSE_R1 |
08c41387 | 306 | |
b13f3595 UH |
307 | def handle_reg_cid(self): |
308 | self.putf(8, 15, [Ann.R_CID_MID, ['Manufacturer ID', 'MID']]) | |
309 | self.putf(16, 31, [Ann.R_CID_OID, ['OEM/application ID', 'OID']]) | |
310 | self.putf(32, 71, [Ann.R_CID_PNM, ['Product name', 'PNM']]) | |
311 | self.putf(72, 79, [Ann.R_CID_PRV, ['Product revision', 'PRV']]) | |
312 | self.putf(80, 111, [Ann.R_CID_PSN, ['Product serial number', 'PSN']]) | |
313 | self.putf(112, 115, [Ann.R_CID_RSVD, ['Reserved', 'RSVD', 'R']]) | |
314 | self.putf(116, 127, [Ann.R_CID_MDT, ['Manufacturing date', 'MDT']]) | |
315 | self.putf(128, 134, [Ann.R_CID_CRC, ['CRC7 checksum', 'CRC']]) | |
316 | self.putf(135, 135, [Ann.R_CID_ONE, ['Always 1', '1']]) | |
317 | ||
08c41387 UH |
318 | # Response tokens can have one of four formats (depends on content). |
319 | # They can have a total length of 48 or 136 bits. | |
320 | # They're sent serially (MSB-first) by the card that the host | |
321 | # addressed previously, or (synchronously) by all connected cards. | |
322 | ||
4dfde5a5 | 323 | def handle_response_r1(self, cmd_pin): |
08c41387 UH |
324 | # R1: Normal response command |
325 | # - Bits[47:47]: Start bit (always 0) | |
326 | # - Bits[46:46]: Transmission bit (0 == card) | |
327 | # - Bits[45:40]: Command index (BCD; valid: 0-63) | |
328 | # - Bits[39:08]: Card status | |
329 | # - Bits[07:01]: CRC7 | |
330 | # - Bits[00:00]: End bit (always 1) | |
4dfde5a5 | 331 | if not self.get_token_bits(cmd_pin, 48): |
08c41387 UH |
332 | return |
333 | self.handle_common_token_fields() | |
604b5f9d | 334 | self.putr(Ann.RESPONSE_R1) |
9f08e757 | 335 | self.puta(0, 31, [Ann.DECODED_F, ['Card status', 'Status', 'S']]) |
08c41387 UH |
336 | for i in range(32): |
337 | self.putbit(8 + i, [card_status[31 - i]]) | |
624710c9 | 338 | self.token, self.state = [], St.GET_COMMAND_TOKEN |
08c41387 | 339 | |
4dfde5a5 | 340 | def handle_response_r1b(self, cmd_pin): |
08c41387 | 341 | # R1b: Same as R1 with an optional busy signal (on the data line) |
4dfde5a5 | 342 | if not self.get_token_bits(cmd_pin, 48): |
08c41387 UH |
343 | return |
344 | self.handle_common_token_fields() | |
9f08e757 | 345 | self.puta(0, 31, [Ann.DECODED_F, ['Card status', 'Status', 'S']]) |
604b5f9d | 346 | self.putr(Ann.RESPONSE_R1B) |
624710c9 | 347 | self.token, self.state = [], St.GET_COMMAND_TOKEN |
08c41387 | 348 | |
4dfde5a5 | 349 | def handle_response_r2(self, cmd_pin): |
08c41387 UH |
350 | # R2: CID/CSD register |
351 | # - Bits[135:135]: Start bit (always 0) | |
352 | # - Bits[134:134]: Transmission bit (0 == card) | |
353 | # - Bits[133:128]: Reserved (always 0b111111) | |
354 | # - Bits[127:001]: CID or CSD register including internal CRC7 | |
355 | # - Bits[000:000]: End bit (always 1) | |
4dfde5a5 | 356 | if not self.get_token_bits(cmd_pin, 136): |
08c41387 UH |
357 | return |
358 | # Annotations for each individual bit. | |
359 | for bit in range(len(self.token)): | |
07da8a9b | 360 | self.putf(bit, bit, [Ann.BIT, ['%d' % self.token[bit].bit]]) |
9f08e757 | 361 | self.putf(0, 0, [Ann.F_START, ['Start bit', 'Start', 'S']]) |
07da8a9b | 362 | t = 'host' if self.token[1].bit == 1 else 'card' |
9f08e757 UH |
363 | self.putf(1, 1, [Ann.F_TRANSM, ['Transmission: ' + t, 'T: ' + t, 'T']]) |
364 | self.putf(2, 7, [Ann.F_CMD, ['Reserved', 'Res', 'R']]) | |
365 | self.putf(8, 134, [Ann.F_ARG, ['Argument', 'Arg', 'A']]) | |
366 | self.putf(135, 135, [Ann.F_END, ['End bit', 'End', 'E']]) | |
367 | self.putf(8, 134, [Ann.DECODED_F, ['CID/CSD register', 'CID/CSD', 'C']]) | |
604b5f9d | 368 | self.putf(0, 135, [Ann.RESPONSE_R2, ['Response: R2']]) |
b13f3595 UH |
369 | |
370 | if self.last_cmd in (Ann.CMD2, Ann.CMD10): | |
371 | self.handle_reg_cid() | |
372 | ||
624710c9 | 373 | self.token, self.state = [], St.GET_COMMAND_TOKEN |
08c41387 | 374 | |
4dfde5a5 | 375 | def handle_response_r3(self, cmd_pin): |
08c41387 UH |
376 | # R3: OCR register |
377 | # - Bits[47:47]: Start bit (always 0) | |
378 | # - Bits[46:46]: Transmission bit (0 == card) | |
379 | # - Bits[45:40]: Reserved (always 0b111111) | |
380 | # - Bits[39:08]: OCR register | |
381 | # - Bits[07:01]: Reserved (always 0b111111) | |
382 | # - Bits[00:00]: End bit (always 1) | |
4dfde5a5 | 383 | if not self.get_token_bits(cmd_pin, 48): |
08c41387 | 384 | return |
604b5f9d | 385 | self.putr(Ann.RESPONSE_R3) |
08c41387 UH |
386 | # Annotations for each individual bit. |
387 | for bit in range(len(self.token)): | |
07da8a9b | 388 | self.putf(bit, bit, [Ann.BIT, ['%d' % self.token[bit].bit]]) |
9f08e757 | 389 | self.putf(0, 0, [Ann.F_START, ['Start bit', 'Start', 'S']]) |
07da8a9b | 390 | t = 'host' if self.token[1].bit == 1 else 'card' |
9f08e757 UH |
391 | self.putf(1, 1, [Ann.F_TRANSM, ['Transmission: ' + t, 'T: ' + t, 'T']]) |
392 | self.putf(2, 7, [Ann.F_CMD, ['Reserved', 'Res', 'R']]) | |
393 | self.putf(8, 39, [Ann.F_ARG, ['Argument', 'Arg', 'A']]) | |
394 | self.putf(40, 46, [Ann.F_CRC, ['Reserved', 'Res', 'R']]) | |
395 | self.putf(47, 47, [Ann.F_END, ['End bit', 'End', 'E']]) | |
396 | self.puta(0, 31, [Ann.DECODED_F, ['OCR register', 'OCR reg', 'OCR', 'O']]) | |
624710c9 | 397 | self.token, self.state = [], St.GET_COMMAND_TOKEN |
08c41387 | 398 | |
4dfde5a5 | 399 | def handle_response_r6(self, cmd_pin): |
08c41387 UH |
400 | # R6: Published RCA response |
401 | # - Bits[47:47]: Start bit (always 0) | |
402 | # - Bits[46:46]: Transmission bit (0 == card) | |
403 | # - Bits[45:40]: Command index (always 0b000011) | |
404 | # - Bits[39:24]: Argument[31:16]: New published RCA of the card | |
405 | # - Bits[23:08]: Argument[15:0]: Card status bits | |
406 | # - Bits[07:01]: CRC7 | |
407 | # - Bits[00:00]: End bit (always 1) | |
4dfde5a5 | 408 | if not self.get_token_bits(cmd_pin, 48): |
08c41387 UH |
409 | return |
410 | self.handle_common_token_fields() | |
9f08e757 UH |
411 | self.puta(0, 15, [Ann.DECODED_F, ['Card status bits', 'Status', 'S']]) |
412 | self.puta(16, 31, [Ann.DECODED_F, ['Relative card address', 'RCA', 'R']]) | |
604b5f9d | 413 | self.putr(Ann.RESPONSE_R6) |
624710c9 | 414 | self.token, self.state = [], St.GET_COMMAND_TOKEN |
08c41387 | 415 | |
4dfde5a5 | 416 | def handle_response_r7(self, cmd_pin): |
08c41387 UH |
417 | # R7: Card interface condition |
418 | # - Bits[47:47]: Start bit (always 0) | |
419 | # - Bits[46:46]: Transmission bit (0 == card) | |
420 | # - Bits[45:40]: Command index (always 0b001000) | |
421 | # - Bits[39:20]: Reserved bits (all-zero) | |
422 | # - Bits[19:16]: Voltage accepted | |
423 | # - Bits[15:08]: Echo-back of check pattern | |
424 | # - Bits[07:01]: CRC7 | |
425 | # - Bits[00:00]: End bit (always 1) | |
4dfde5a5 | 426 | if not self.get_token_bits(cmd_pin, 48): |
08c41387 UH |
427 | return |
428 | self.handle_common_token_fields() | |
429 | ||
604b5f9d | 430 | self.putr(Ann.RESPONSE_R7) |
08c41387 UH |
431 | |
432 | # Arg[31:12]: Reserved bits (all-zero) | |
9f08e757 | 433 | self.puta(12, 31, [Ann.DECODED_F, ['Reserved', 'Res', 'R']]) |
08c41387 UH |
434 | |
435 | # Arg[11:08]: Voltage accepted | |
07da8a9b | 436 | v = ''.join(str(i.bit) for i in self.token[28:32]) |
08c41387 | 437 | av = accepted_voltages.get(int('0b' + v, 2), 'Unknown') |
9f08e757 UH |
438 | self.puta(8, 11, [Ann.DECODED_F, |
439 | ['Voltage accepted: ' + av, 'Voltage', 'Volt', 'V']]) | |
08c41387 UH |
440 | |
441 | # Arg[07:00]: Echo-back of check pattern | |
9f08e757 UH |
442 | self.puta(0, 7, [Ann.DECODED_F, |
443 | ['Echo-back of check pattern', 'Echo', 'E']]) | |
08c41387 | 444 | |
624710c9 | 445 | self.token, self.state = [], St.GET_COMMAND_TOKEN |
08c41387 | 446 | |
11535843 GS |
447 | def decode(self): |
448 | while True: | |
08c41387 | 449 | # Wait for a rising CLK edge. |
4dfde5a5 | 450 | (cmd_pin, clk, dat0, dat1, dat2, dat3) = self.wait({Pin.CLK: 'r'}) |
08c41387 UH |
451 | |
452 | # State machine. | |
624710c9 | 453 | if self.state == St.GET_COMMAND_TOKEN: |
08c41387 UH |
454 | if len(self.token) == 0: |
455 | # Wait for start bit (CMD = 0). | |
4dfde5a5 | 456 | if cmd_pin != 0: |
08c41387 | 457 | continue |
4dfde5a5 | 458 | self.get_command_token(cmd_pin) |
624710c9 | 459 | elif self.state.value.startswith('HANDLE_CMD'): |
08c41387 | 460 | # Call the respective handler method for the command. |
624710c9 | 461 | a, cmdstr = 'a' if self.is_acmd else '', self.state.value[10:].lower() |
08c41387 UH |
462 | handle_cmd = getattr(self, 'handle_%scmd%s' % (a, cmdstr)) |
463 | handle_cmd() | |
464 | # Leave ACMD mode again after the first command after CMD55. | |
465 | if self.is_acmd and cmdstr not in ('55', '63'): | |
466 | self.is_acmd = False | |
624710c9 | 467 | elif self.state.value.startswith('GET_RESPONSE'): |
08c41387 UH |
468 | if len(self.token) == 0: |
469 | # Wait for start bit (CMD = 0). | |
4dfde5a5 | 470 | if cmd_pin != 0: |
08c41387 UH |
471 | continue |
472 | # Call the respective handler method for the response. | |
624710c9 | 473 | s = 'handle_response_%s' % self.state.value[13:].lower() |
08c41387 | 474 | handle_response = getattr(self, s) |
4dfde5a5 | 475 | handle_response(cmd_pin) |