2 ## This file is part of the libsigrokdecode project.
4 ## Copyright (C) 2012-2014 Uwe Hermann <uwe@hermann-uwe.de>
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.
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.
16 ## You should have received a copy of the GNU General Public License
17 ## along with this program; if not, write to the Free Software
18 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 import sigrokdecode as srd
24 # Normal commands (CMD)
31 12: 'STOP_TRANSMISSION',
34 17: 'READ_SINGLE_BLOCK',
35 18: 'READ_MULTIPLE_BLOCK',
37 25: 'WRITE_MULTIPLE_BLOCK',
41 30: 'SEND_WRITE_PROT',
42 32: 'ERASE_WR_BLK_START_ADDR',
43 33: 'ERASE_WR_BLK_END_ADDR',
50 # CMD60-63: Reserved for manufacturer
52 # Application-specific commands (ACMD)
54 18: 'Reserved for SD security applications',
55 22: 'SEND_NUM_WR_BLOCKS',
56 23: 'SET_WR_BLK_ERASE_COUNT',
57 25: 'Reserved for SD security applications',
58 26: 'Reserved for SD security applications',
59 38: 'Reserved for SD security applications',
60 41: 'SD_SEND_OP_COND',
61 42: 'SET_CLR_CARD_DETECT',
62 43: 'Reserved for SD security applications',
63 44: 'Reserved for SD security applications',
64 45: 'Reserved for SD security applications',
65 46: 'Reserved for SD security applications',
66 47: 'Reserved for SD security applications',
67 48: 'Reserved for SD security applications',
68 49: 'Reserved for SD security applications',
74 for i in range(63 + 1):
75 l.append(['cmd%d' % i, 'CMD%d' % i])
78 class Decoder(srd.Decoder):
81 name = 'SD card (SPI mode)'
82 longname = 'Secure Digital card (SPI mode)'
83 desc = 'Secure Digital card (SPI mode) low-level protocol.'
86 outputs = ['sdcard_spi']
90 annotations = ann_cmd_list() + [
91 ['cmd-token', 'Command token'],
100 ('bits', 'Bits', (70,)),
101 ('cmd-reply', 'Commands/replies',
102 tuple(range(0, 63 + 1)) + tuple(range(65, 69 + 1))),
103 ('cmd-token', 'Command tokens', (64,)),
106 def __init__(self, **kwargs):
109 self.ss, self.es = 0, 0
110 self.bit_ss, self.bit_es = 0, 0
111 self.cmd_ss, self.cmd_es = 0, 0
113 self.is_acmd = False # Indicates CMD vs. ACMD
118 # self.out_python = self.register(srd.OUTPUT_PYTHON)
119 self.out_ann = self.register(srd.OUTPUT_ANN)
121 def putx(self, data):
122 self.put(self.cmd_ss, self.cmd_es, self.out_ann, data)
124 def putb(self, data):
125 self.put(self.bit_ss, self.bit_es, self.out_ann, data)
127 def handle_command_token(self, mosi, miso):
128 # Command tokens (6 bytes) are sent (MSB-first) by the host.
131 # - CMD[47:47]: Start bit (always 0)
132 # - CMD[46:46]: Transmitter bit (1 == host)
133 # - CMD[45:40]: Command index (BCD; valid: 0-63)
134 # - CMD[39:08]: Argument
136 # - CMD[00:00]: End bit (always 1)
138 if len(self.cmd_token) == 0:
139 self.cmd_ss = self.ss
141 self.cmd_token.append(mosi)
142 # TODO: Record MISO too?
144 # All command tokens are 6 bytes long.
145 if len(self.cmd_token) < 6:
148 self.cmd_es = self.es
150 # Received all 6 bytes of the command token. Now decode it.
155 s = 'ACMD' if self.is_acmd else 'CMD'
157 self.putx([64, [s + ': %02x %02x %02x %02x %02x %02x' % tuple(t)]])
160 self.startbit = (t[0] & (1 << 7)) >> 7
161 self.putb([70, ['Start bit: %d' % self.startbit]])
162 if self.startbit != 0:
164 self.putb([1, ['Warning: Start bit != 0']])
167 self.transmitterbit = (t[0] & (1 << 6)) >> 6
168 self.putb([70, ['Transmitter bit: %d' % self.transmitterbit]])
169 if self.transmitterbit != 0:
171 self.putb([1, ['Warning: Transmitter bit != 1']])
174 cmd = self.cmd_index = t[0] & 0x3f
176 self.putb([70, ['Command: %s%d (%s)' % (s, cmd, cmd_name[cmd])]])
179 self.arg = (t[1] << 24) | (t[2] << 16) | (t[3] << 8) | t[4]
180 self.putb([70, ['Argument: 0x%04x' % self.arg]])
181 # TODO: Sanity check on argument? Must be per-cmd?
186 self.putb([70, ['CRC: 0x%01x' % self.crc]])
189 self.endbit = t[5] & (1 << 0)
190 self.putb([70, ['End bit: %d' % self.endbit]])
193 self.putb([1, ['Warning: End bit != 1']])
196 if cmd in (0, 1, 9, 16, 17, 41, 49, 55, 59):
197 self.state = 'HANDLE CMD%d' % cmd
200 if self.is_acmd and cmd != 55:
205 def handle_cmd0(self, ):
206 # CMD0: GO_IDLE_STATE
208 self.putx([0, ['CMD0: Card reset / idle state']])
209 self.state = 'GET RESPONSE R1'
211 def handle_cmd1(self):
214 hcs = (self.arg & (1 << 30)) >> 30
215 self.putb([1, ['HCS bit = %d' % hcs]])
216 self.state = 'GET RESPONSE R1'
218 def handle_cmd9(self):
219 # CMD9: SEND_CSD (128 bits / 16 bytes)
220 if len(self.read_buf) == 0:
221 self.cmd_ss = self.ss
222 self.read_buf.append(self.miso)
224 ### if len(self.read_buf) < 16:
225 if len(self.read_buf) < 16 + 4:
227 self.cmd_es = self.es
228 self.read_buf = self.read_buf[4:] ### TODO: Document or redo.
229 self.putx([9, ['CSD: %s' % self.read_buf]])
230 # TODO: Decode all bits.
232 ### self.state = 'GET RESPONSE R1'
235 def handle_cmd10(self):
236 # CMD10: SEND_CID (128 bits / 16 bytes)
237 self.read_buf.append(self.miso)
238 if len(self.read_buf) < 16:
240 self.putx([10, ['CID: %s' % self.read_buf]])
241 # TODO: Decode all bits.
243 self.state = 'GET RESPONSE R1'
245 def handle_cmd16(self):
246 # CMD16: SET_BLOCKLEN
247 self.blocklen = self.arg # TODO
248 # TODO: Sanity check on block length.
249 self.putx([16, ['Block length: %d' % self.blocklen]])
250 self.state = 'GET RESPONSE R1'
252 def handle_cmd17(self):
253 # CMD17: READ_SINGLE_BLOCK
254 if len(self.read_buf) == 0:
255 self.cmd_ss = self.ss
256 self.read_buf.append(self.miso)
257 if len(self.read_buf) == 1:
258 self.putx([0, ['Read block at address: 0x%04x' % self.arg]])
259 if len(self.read_buf) < self.blocklen + 2: # FIXME
261 self.cmd_es = self.es
262 self.read_buf = self.read_buf[2:] # FIXME
263 self.putx([17, ['Block data: %s' % self.read_buf]])
265 self.state = 'GET RESPONSE R1'
267 def handle_cmd41(self):
268 # ACMD41: SD_SEND_OP_COND
269 self.state = 'GET RESPONSE R1'
271 def handle_cmd49(self):
272 self.state = 'GET RESPONSE R1'
274 def handle_cmd55(self):
277 self.state = 'GET RESPONSE R1'
279 def handle_cmd59(self):
281 crc_on_off = self.arg & (1 << 0)
282 s = 'on' if crc_on_off == 1 else 'off'
283 self.putb([59, ['SD card CRC option: %s' % s]])
284 self.state = 'GET RESPONSE R1'
286 def handle_cid_register(self):
287 # Card Identification (CID) register, 128bits
291 # Manufacturer ID: CID[127:120] (8 bits)
294 # OEM/Application ID: CID[119:104] (16 bits)
295 oid = (cid[14] << 8) | cid[13]
297 # Product name: CID[103:64] (40 bits)
299 for i in range(12, 8 - 1, -1):
303 # Product revision: CID[63:56] (8 bits)
306 # Product serial number: CID[55:24] (32 bits)
308 for i in range(6, 3 - 1, -1):
312 # RESERVED: CID[23:20] (4 bits)
314 # Manufacturing date: CID[19:8] (12 bits)
317 # CRC7 checksum: CID[7:1] (7 bits)
320 # Not used, always 1: CID[0:0] (1 bit)
323 def handle_response_r1(self, res):
324 # The R1 response token format (1 byte).
325 # Sent by the card after every command except for SEND_STATUS.
327 self.cmd_ss, self.cmd_es = self.ss, self.es
329 self.putx([65, ['R1: 0x%02x' % res]])
331 # TODO: Configurable whether all bits are decoded.
333 # 'In idle state' bit
334 s = '' if (res & (1 << 0)) else 'not '
335 self.putb([0, ['Card is %sin idle state' % s]])
338 s = '' if (res & (1 << 1)) else 'not '
339 self.putb([0, ['Erase sequence %scleared' % s]])
341 # 'Illegal command' bit
342 s = 'I' if (res & (1 << 2)) else 'No i'
343 self.putb([0, ['%sllegal command detected' % s]])
345 # 'Communication CRC error' bit
346 s = 'failed' if (res & (1 << 3)) else 'was successful'
347 self.putb([0, ['CRC check of last command %s' % s]])
349 # 'Erase sequence error' bit
350 s = 'E' if (res & (1 << 4)) else 'No e'
351 self.putb([0, ['%srror in the sequence of erase commands' % s]])
353 # 'Address error' bit
354 s = 'M' if (res & (1 << 4)) else 'No m'
355 self.putb([0, ['%sisaligned address used in command' % s]])
357 # 'Parameter error' bit
358 s = '' if (res & (1 << 4)) else 'not '
359 self.putb([0, ['Command argument %soutside allowed range' % s]])
363 def handle_response_r1b(self, res):
367 def handle_response_r2(self, res):
371 def handle_response_r3(self, res):
375 # Note: Response token formats R4 and R5 are reserved for SDIO.
379 def handle_response_r7(self, res):
383 def decode(self, ss, es, data):
384 ptype, mosi, miso = data
386 # For now, ignore non-data packets.
390 self.ss, self.es = ss, es
393 if self.state == 'IDLE':
394 # Ignore stray 0xff bytes, some devices seem to send those!?
395 if mosi == 0xff: # TODO?
397 self.state = 'GET COMMAND TOKEN'
398 self.handle_command_token(mosi, miso)
399 elif self.state == 'GET COMMAND TOKEN':
400 self.handle_command_token(mosi, miso)
401 elif self.state.startswith('HANDLE CMD'):
402 self.miso, self.mosi = miso, mosi
403 # Call the respective handler method for the command.
404 s = 'handle_cmd%s' % self.state[10:].lower()
405 handle_cmd = getattr(self, s)
407 elif self.state.startswith('GET RESPONSE'):
408 # Ignore stray 0xff bytes, some devices seem to send those!?
409 if miso == 0xff: # TODO?
412 # Call the respective handler method for the response.
413 s = 'handle_response_%s' % self.state[13:].lower()
414 handle_response = getattr(self, s)
415 handle_response(miso)
419 raise Exception('Invalid state: %s' % self.state)