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',
72 class Decoder(srd.Decoder):
75 name = 'SD card (SPI mode)'
76 longname = 'Secure Digital card (SPI mode)'
77 desc = 'Secure Digital card (SPI mode) low-level protocol.'
80 outputs = ['sdcard_spi']
85 ['text', 'Human-readable text'],
86 ['warnings', 'Human-readable warnings'],
89 def __init__(self, **kwargs):
92 self.ss, self.es = 0, 0
93 self.bit_ss, self.bit_es = 0, 0
94 self.cmd_ss, self.cmd_es = 0, 0
96 self.is_acmd = False # Indicates CMD vs. ACMD
101 # self.out_python = self.register(srd.OUTPUT_PYTHON)
102 self.out_ann = self.register(srd.OUTPUT_ANN)
104 def putx(self, data):
105 self.put(self.cmd_ss, self.cmd_es, self.out_ann, data)
107 def putb(self, data):
108 self.put(self.bit_ss, self.bit_es, self.out_ann, data)
110 def handle_command_token(self, mosi, miso):
111 # Command tokens (6 bytes) are sent (MSB-first) by the host.
114 # - CMD[47:47]: Start bit (always 0)
115 # - CMD[46:46]: Transmitter bit (1 == host)
116 # - CMD[45:40]: Command index (BCD; valid: 0-63)
117 # - CMD[39:08]: Argument
119 # - CMD[00:00]: End bit (always 1)
121 if len(self.cmd_token) == 0:
122 self.cmd_ss = self.ss
124 self.cmd_token.append(mosi)
125 # TODO: Record MISO too?
127 # All command tokens are 6 bytes long.
128 if len(self.cmd_token) < 6:
131 self.cmd_es = self.es
133 # Received all 6 bytes of the command token. Now decode it.
138 s = 'ACMD' if self.is_acmd else 'CMD'
140 self.putx([0, [s + ': %02x %02x %02x %02x %02x %02x' % tuple(t)]])
143 self.startbit = (t[0] & (1 << 7)) >> 7
144 self.putb([0, ['Start bit: %d' % self.startbit]])
145 if self.startbit != 0:
147 self.putb([1, ['Warning: Start bit != 0']])
150 self.transmitterbit = (t[0] & (1 << 6)) >> 6
151 self.putb([0, ['Transmitter bit: %d' % self.transmitterbit]])
152 if self.transmitterbit != 0:
154 self.putb([1, ['Warning: Transmitter bit != 1']])
157 cmd = self.cmd_index = t[0] & 0x3f
159 self.putb([0, ['Command: %s%d (%s)' % (s, cmd, cmd_name[cmd])]])
162 self.arg = (t[1] << 24) | (t[2] << 16) | (t[3] << 8) | t[4]
163 self.putb([0, ['Argument: 0x%04x' % self.arg]])
164 # TODO: Sanity check on argument? Must be per-cmd?
169 self.putb([0, ['CRC: 0x%01x' % self.crc]])
172 self.endbit = t[5] & (1 << 0)
173 self.putb([0, ['End bit: %d' % self.endbit]])
176 self.putb([1, ['Warning: End bit != 1']])
179 if cmd in (0, 1, 9, 16, 17, 41, 49, 55, 59):
180 self.state = 'HANDLE CMD%d' % cmd
183 if self.is_acmd and cmd != 55:
188 def handle_cmd0(self, ):
189 # CMD0: GO_IDLE_STATE
191 self.putx([0, ['CMD0: Card reset / idle state']])
192 self.state = 'GET RESPONSE R1'
194 def handle_cmd1(self):
197 hcs = (self.arg & (1 << 30)) >> 30
198 self.putb([0, ['HCS bit = %d' % hcs]])
199 self.state = 'GET RESPONSE R1'
201 def handle_cmd9(self):
202 # CMD9: SEND_CSD (128 bits / 16 bytes)
203 if len(self.read_buf) == 0:
204 self.cmd_ss = self.ss
205 self.read_buf.append(self.miso)
207 ### if len(self.read_buf) < 16:
208 if len(self.read_buf) < 16 + 4:
210 self.cmd_es = self.es
211 self.read_buf = self.read_buf[4:] ### TODO: Document or redo.
212 self.putx([0, ['CSD: %s' % self.read_buf]])
213 # TODO: Decode all bits.
215 ### self.state = 'GET RESPONSE R1'
218 def handle_cmd10(self):
219 # CMD10: SEND_CID (128 bits / 16 bytes)
220 self.read_buf.append(self.miso)
221 if len(self.read_buf) < 16:
223 self.putx([0, ['CID: %s' % self.read_buf]])
224 # TODO: Decode all bits.
226 self.state = 'GET RESPONSE R1'
228 def handle_cmd16(self):
229 # CMD16: SET_BLOCKLEN
230 self.blocklen = self.arg # TODO
231 # TODO: Sanity check on block length.
232 self.putx([0, ['Block length: %d' % self.blocklen]])
233 self.state = 'GET RESPONSE R1'
235 def handle_cmd17(self):
236 # CMD17: READ_SINGLE_BLOCK
237 if len(self.read_buf) == 0:
238 self.cmd_ss = self.ss
239 self.read_buf.append(self.miso)
240 if len(self.read_buf) == 1:
241 self.putx([0, ['Read block at address: 0x%04x' % self.arg]])
242 if len(self.read_buf) < self.blocklen + 2: # FIXME
244 self.cmd_es = self.es
245 self.read_buf = self.read_buf[2:] # FIXME
246 self.putx([0, ['Block data: %s' % self.read_buf]])
248 self.state = 'GET RESPONSE R1'
250 def handle_cmd41(self):
251 # ACMD41: SD_SEND_OP_COND
252 self.state = 'GET RESPONSE R1'
254 def handle_cmd49(self):
255 self.state = 'GET RESPONSE R1'
257 def handle_cmd55(self):
260 self.state = 'GET RESPONSE R1'
262 def handle_cmd59(self):
264 crc_on_off = self.arg & (1 << 0)
265 s = 'on' if crc_on_off == 1 else 'off'
266 self.putb([0, ['SD card CRC option: %s' % s]])
267 self.state = 'GET RESPONSE R1'
269 def handle_cid_register(self):
270 # Card Identification (CID) register, 128bits
274 # Manufacturer ID: CID[127:120] (8 bits)
277 # OEM/Application ID: CID[119:104] (16 bits)
278 oid = (cid[14] << 8) | cid[13]
280 # Product name: CID[103:64] (40 bits)
282 for i in range(12, 8 - 1, -1):
286 # Product revision: CID[63:56] (8 bits)
289 # Product serial number: CID[55:24] (32 bits)
291 for i in range(6, 3 - 1, -1):
295 # RESERVED: CID[23:20] (4 bits)
297 # Manufacturing date: CID[19:8] (12 bits)
300 # CRC7 checksum: CID[7:1] (7 bits)
303 # Not used, always 1: CID[0:0] (1 bit)
306 def handle_response_r1(self, res):
307 # The R1 response token format (1 byte).
308 # Sent by the card after every command except for SEND_STATUS.
310 self.cmd_ss, self.cmd_es = self.ss, self.es
312 self.putx([0, ['R1: 0x%02x' % res]])
314 # TODO: Configurable whether all bits are decoded.
316 # 'In idle state' bit
317 s = '' if (res & (1 << 0)) else 'not '
318 self.putb([0, ['Card is %sin idle state' % s]])
321 s = '' if (res & (1 << 1)) else 'not '
322 self.putb([0, ['Erase sequence %scleared' % s]])
324 # 'Illegal command' bit
325 s = 'I' if (res & (1 << 2)) else 'No i'
326 self.putb([0, ['%sllegal command detected' % s]])
328 # 'Communication CRC error' bit
329 s = 'failed' if (res & (1 << 3)) else 'was successful'
330 self.putb([0, ['CRC check of last command %s' % s]])
332 # 'Erase sequence error' bit
333 s = 'E' if (res & (1 << 4)) else 'No e'
334 self.putb([0, ['%srror in the sequence of erase commands' % s]])
336 # 'Address error' bit
337 s = 'M' if (res & (1 << 4)) else 'No m'
338 self.putb([0, ['%sisaligned address used in command' % s]])
340 # 'Parameter error' bit
341 s = '' if (res & (1 << 4)) else 'not '
342 self.putb([0, ['Command argument %soutside allowed range' % s]])
346 def handle_response_r1b(self, res):
350 def handle_response_r2(self, res):
354 def handle_response_r3(self, res):
358 # Note: Response token formats R4 and R5 are reserved for SDIO.
362 def handle_response_r7(self, res):
366 def decode(self, ss, es, data):
367 ptype, mosi, miso = data
369 # For now, ignore non-data packets.
373 self.ss, self.es = ss, es
376 if self.state == 'IDLE':
377 # Ignore stray 0xff bytes, some devices seem to send those!?
378 if mosi == 0xff: # TODO?
380 self.state = 'GET COMMAND TOKEN'
381 self.handle_command_token(mosi, miso)
382 elif self.state == 'GET COMMAND TOKEN':
383 self.handle_command_token(mosi, miso)
384 elif self.state.startswith('HANDLE CMD'):
385 self.miso, self.mosi = miso, mosi
386 # Call the respective handler method for the command.
387 s = 'handle_cmd%s' % self.state[10:].lower()
388 handle_cmd = getattr(self, s)
390 elif self.state.startswith('GET RESPONSE'):
391 # Ignore stray 0xff bytes, some devices seem to send those!?
392 if miso == 0xff: # TODO?
395 # Call the respective handler method for the response.
396 s = 'handle_response_%s' % self.state[13:].lower()
397 handle_response = getattr(self, s)
398 handle_response(miso)
402 raise Exception('Invalid state: %s' % self.state)