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, see <http://www.gnu.org/licenses/>.
20 import sigrokdecode as srd
21 from common.sdcard import (cmd_names, acmd_names)
23 class Decoder(srd.Decoder):
26 name = 'SD card (SPI mode)'
27 longname = 'Secure Digital card (SPI mode)'
28 desc = 'Secure Digital card (SPI mode) low-level protocol.'
31 outputs = ['sdcard_spi']
33 tuple(('cmd%d' % i, 'CMD%d' % i) for i in range(64)) + \
34 tuple(('acmd%d' % i, 'ACMD%d' % i) for i in range(64)) + ( \
41 ('bit-warnings', 'Bit warnings'),
44 ('bits', 'Bits', (134, 135)),
45 ('cmd-reply', 'Commands/replies', tuple(range(134))),
50 self.ss, self.es = 0, 0
51 self.ss_bit, self.es_bit = 0, 0
52 self.ss_cmd, self.es_cmd = 0, 0
54 self.cmd_token_bits = []
55 self.is_acmd = False # Indicates CMD vs. ACMD
61 self.out_ann = self.register(srd.OUTPUT_ANN)
64 self.put(self.ss_cmd, self.es_cmd, self.out_ann, data)
66 def putc(self, cmd, desc):
67 self.putx([cmd, ['%s: %s' % (self.cmd_str, desc)]])
70 self.put(self.ss_bit, self.es_bit, self.out_ann, data)
72 def cmd_name(self, cmd):
73 c = acmd_names if self.is_acmd else cmd_names
74 s = c.get(cmd, 'Unknown')
75 # SD mode names for CMD32/33: ERASE_WR_BLK_{START,END}.
76 # SPI mode names for CMD32/33: ERASE_WR_BLK_{START,END}_ADDR.
81 def handle_command_token(self, mosi, miso):
82 # Command tokens (6 bytes) are sent (MSB-first) by the host.
85 # - CMD[47:47]: Start bit (always 0)
86 # - CMD[46:46]: Transmitter bit (1 == host)
87 # - CMD[45:40]: Command index (BCD; valid: 0-63)
88 # - CMD[39:08]: Argument
90 # - CMD[00:00]: End bit (always 1)
92 if len(self.cmd_token) == 0:
95 self.cmd_token.append(mosi)
96 self.cmd_token_bits.append(self.mosi_bits)
98 # All command tokens are 6 bytes long.
99 if len(self.cmd_token) < 6:
102 self.es_cmd = self.es
107 s = 'ACMD' if self.is_acmd else 'CMD'
110 return self.cmd_token_bits[5 - byte][bit]
112 # Bits[47:47]: Start bit (always 0)
113 bit, self.ss_bit, self.es_bit = tb(5, 7)[0], tb(5, 7)[1], tb(5, 7)[2]
115 self.putb([134, ['Start bit: %d' % bit]])
117 self.putb([135, ['Start bit: %s (Warning: Must be 0!)' % bit]])
119 # Bits[46:46]: Transmitter bit (1 == host)
120 bit, self.ss_bit, self.es_bit = tb(5, 6)[0], tb(5, 6)[1], tb(5, 6)[2]
122 self.putb([134, ['Transmitter bit: %d' % bit]])
124 self.putb([135, ['Transmitter bit: %d (Warning: Must be 1!)' % bit]])
126 # Bits[45:40]: Command index (BCD; valid: 0-63)
127 cmd = self.cmd_index = t[0] & 0x3f
128 self.ss_bit, self.es_bit = tb(5, 5)[1], tb(5, 0)[2]
129 self.putb([134, ['Command: %s%d (%s)' % (s, cmd, self.cmd_name(cmd))]])
131 # Bits[39:8]: Argument
132 self.arg = (t[1] << 24) | (t[2] << 16) | (t[3] << 8) | t[4]
133 self.ss_bit, self.es_bit = tb(4, 7)[1], tb(1, 0)[2]
134 self.putb([134, ['Argument: 0x%04x' % self.arg]])
139 self.ss_bit, self.es_bit = tb(0, 7)[1], tb(0, 1)[2]
140 self.putb([134, ['CRC7: 0x%01x' % crc]])
142 # Bits[0:0]: End bit (always 1)
143 bit, self.ss_bit, self.es_bit = tb(0, 0)[0], tb(0, 0)[1], tb(0, 0)[2]
144 self.putb([134, ['End bit: %d' % bit]])
146 self.putb([134, ['End bit: %d' % bit]])
148 self.putb([135, ['End bit: %d (Warning: Must be 1!)' % bit]])
151 if cmd in (0, 1, 9, 16, 17, 41, 49, 55, 59):
152 self.state = 'HANDLE CMD%d' % cmd
153 self.cmd_str = '%s%d (%s)' % (s, cmd, self.cmd_name(cmd))
155 self.state = 'HANDLE CMD999'
156 a = '%s%d: %02x %02x %02x %02x %02x %02x' % ((s, cmd) + tuple(t))
157 self.putx([cmd, [a]])
159 def handle_cmd0(self):
160 # CMD0: GO_IDLE_STATE
161 self.putc(0, 'Reset the SD card')
162 self.state = 'GET RESPONSE R1'
164 def handle_cmd1(self):
166 self.putc(1, 'Send HCS info and activate the card init process')
167 hcs = (self.arg & (1 << 30)) >> 30
168 self.ss_bit = self.cmd_token_bits[5 - 4][6][1]
169 self.es_bit = self.cmd_token_bits[5 - 4][6][2]
170 self.putb([134, ['HCS: %d' % hcs]])
171 self.state = 'GET RESPONSE R1'
173 def handle_cmd9(self):
174 # CMD9: SEND_CSD (128 bits / 16 bytes)
175 self.putc(9, 'Ask card to send its card specific data (CSD)')
176 if len(self.read_buf) == 0:
177 self.ss_cmd = self.ss
178 self.read_buf.append(self.miso)
180 ### if len(self.read_buf) < 16:
181 if len(self.read_buf) < 16 + 4:
183 self.es_cmd = self.es
184 self.read_buf = self.read_buf[4:] # TODO: Document or redo.
185 self.putx([9, ['CSD: %s' % self.read_buf]])
186 # TODO: Decode all bits.
188 ### self.state = 'GET RESPONSE R1'
191 def handle_cmd10(self):
192 # CMD10: SEND_CID (128 bits / 16 bytes)
193 self.putc(10, 'Ask card to send its card identification (CID)')
194 self.read_buf.append(self.miso)
195 if len(self.read_buf) < 16:
197 self.putx([10, ['CID: %s' % self.read_buf]])
198 # TODO: Decode all bits.
200 self.state = 'GET RESPONSE R1'
202 def handle_cmd16(self):
203 # CMD16: SET_BLOCKLEN
204 self.blocklen = self.arg
205 # TODO: Sanity check on block length.
206 self.putc(16, 'Set the block length to %d bytes' % self.blocklen)
207 self.state = 'GET RESPONSE R1'
209 def handle_cmd17(self):
210 # CMD17: READ_SINGLE_BLOCK
211 self.putc(17, 'Read a block from address 0x%04x' % self.arg)
212 if len(self.read_buf) == 0:
213 self.ss_cmd = self.ss
214 self.read_buf.append(self.miso)
215 if len(self.read_buf) < self.blocklen + 2: # FIXME
217 self.es_cmd = self.es
218 self.read_buf = self.read_buf[2:] # FIXME
219 self.putx([17, ['Block data: %s' % self.read_buf]])
221 self.state = 'GET RESPONSE R1'
223 def handle_cmd49(self):
224 self.state = 'GET RESPONSE R1'
226 def handle_cmd55(self):
228 self.putc(55, 'Next command is an application-specific command')
230 self.state = 'GET RESPONSE R1'
232 def handle_cmd59(self):
234 crc_on_off = self.arg & (1 << 0)
235 s = 'on' if crc_on_off == 1 else 'off'
236 self.putc(59, 'Turn the SD card CRC option %s' % s)
237 self.state = 'GET RESPONSE R1'
239 def handle_acmd41(self):
240 # ACMD41: SD_SEND_OP_COND
241 self.putc(64 + 41, 'Send HCS info and activate the card init process')
242 self.state = 'GET RESPONSE R1'
244 def handle_cmd999(self):
245 self.state = 'GET RESPONSE R1'
247 def handle_cid_register(self):
248 # Card Identification (CID) register, 128bits
252 # Manufacturer ID: CID[127:120] (8 bits)
255 # OEM/Application ID: CID[119:104] (16 bits)
256 oid = (cid[14] << 8) | cid[13]
258 # Product name: CID[103:64] (40 bits)
260 for i in range(12, 8 - 1, -1):
264 # Product revision: CID[63:56] (8 bits)
267 # Product serial number: CID[55:24] (32 bits)
269 for i in range(6, 3 - 1, -1):
273 # RESERVED: CID[23:20] (4 bits)
275 # Manufacturing date: CID[19:8] (12 bits)
278 # CRC7 checksum: CID[7:1] (7 bits)
281 # Not used, always 1: CID[0:0] (1 bit)
284 def handle_response_r1(self, res):
285 # The R1 response token format (1 byte).
286 # Sent by the card after every command except for SEND_STATUS.
288 self.ss_cmd, self.es_cmd = self.miso_bits[7][1], self.miso_bits[0][2]
289 self.putx([65, ['R1: 0x%02x' % res]])
291 def putbit(bit, data):
292 b = self.miso_bits[bit]
293 self.ss_bit, self.es_bit = b[1], b[2]
294 self.putb([134, data])
296 # Bit 0: 'In idle state' bit
297 s = '' if (res & (1 << 0)) else 'not '
298 putbit(0, ['Card is %sin idle state' % s])
300 # Bit 1: 'Erase reset' bit
301 s = '' if (res & (1 << 1)) else 'not '
302 putbit(1, ['Erase sequence %scleared' % s])
304 # Bit 2: 'Illegal command' bit
305 s = 'I' if (res & (1 << 2)) else 'No i'
306 putbit(2, ['%sllegal command detected' % s])
308 # Bit 3: 'Communication CRC error' bit
309 s = 'failed' if (res & (1 << 3)) else 'was successful'
310 putbit(3, ['CRC check of last command %s' % s])
312 # Bit 4: 'Erase sequence error' bit
313 s = 'E' if (res & (1 << 4)) else 'No e'
314 putbit(4, ['%srror in the sequence of erase commands' % s])
316 # Bit 5: 'Address error' bit
317 s = 'M' if (res & (1 << 4)) else 'No m'
318 putbit(5, ['%sisaligned address used in command' % s])
320 # Bit 6: 'Parameter error' bit
321 s = '' if (res & (1 << 4)) else 'not '
322 putbit(6, ['Command argument %soutside allowed range' % s])
324 # Bit 7: Always set to 0
325 putbit(7, ['Bit 7 (always 0)'])
329 def handle_response_r1b(self, res):
333 def handle_response_r2(self, res):
337 def handle_response_r3(self, res):
341 # Note: Response token formats R4 and R5 are reserved for SDIO.
345 def handle_response_r7(self, res):
349 def decode(self, ss, es, data):
350 ptype, mosi, miso = data
352 # For now, only use DATA and BITS packets.
353 if ptype not in ('DATA', 'BITS'):
356 # Store the individual bit values and ss/es numbers. The next packet
357 # is guaranteed to be a 'DATA' packet belonging to this 'BITS' one.
359 self.miso_bits, self.mosi_bits = miso, mosi
362 self.ss, self.es = ss, es
365 if self.state == 'IDLE':
366 # Ignore stray 0xff bytes, some devices seem to send those!?
367 if mosi == 0xff: # TODO?
369 self.state = 'GET COMMAND TOKEN'
370 self.handle_command_token(mosi, miso)
371 elif self.state == 'GET COMMAND TOKEN':
372 self.handle_command_token(mosi, miso)
373 elif self.state.startswith('HANDLE CMD'):
374 self.miso, self.mosi = miso, mosi
375 # Call the respective handler method for the command.
376 a, cmdstr = 'a' if self.is_acmd else '', self.state[10:].lower()
377 handle_cmd = getattr(self, 'handle_%scmd%s' % (a, cmdstr))
380 self.cmd_token_bits = []
381 # Leave ACMD mode again after the first command after CMD55.
382 if self.is_acmd and cmdstr != '55':
384 elif self.state.startswith('GET RESPONSE'):
385 # Ignore stray 0xff bytes, some devices seem to send those!?
386 if miso == 0xff: # TODO?
389 # Call the respective handler method for the response.
390 s = 'handle_response_%s' % self.state[13:].lower()
391 handle_response = getattr(self, s)
392 handle_response(miso)