From: Uwe Hermann Date: Sat, 17 Dec 2011 16:29:10 +0000 (+0100) Subject: srd: Add MX25Lxx05D SPI chip decoder. X-Git-Tag: libsigrokdecode-0.1.0~239 X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=commitdiff_plain;h=1b1c914fe5c1b88db6e0b8e49bee896428d483cb;ds=inline srd: Add MX25Lxx05D SPI chip decoder. Work in progress, not yet fully functional. --- diff --git a/decoders/Makefile.am b/decoders/Makefile.am index 0aa1a7d..72987f4 100644 --- a/decoders/Makefile.am +++ b/decoders/Makefile.am @@ -23,6 +23,7 @@ pkgdatadir = $(DECODERS_DIR) # Please keep this list in alphabetical order. dist_pkgdata_DATA = \ i2c.py \ + mx25lxx05d.py \ nunchuk.py \ spi.py \ srd_usb.py \ diff --git a/decoders/mx25lxx05d.py b/decoders/mx25lxx05d.py new file mode 100644 index 0000000..9ae1370 --- /dev/null +++ b/decoders/mx25lxx05d.py @@ -0,0 +1,364 @@ +## +## This file is part of the sigrok project. +## +## Copyright (C) 2011 Uwe Hermann +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; either version 2 of the License, or +## (at your option) any later version. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, write to the Free Software +## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +## + +# +# Macronix MX25Lxx05D SPI (NOR) flash chip decoder. +# Works for MX25L1605D/MX25L3205D/MX25L6405D. +# + +# +# TODO: Description +# +# Details: +# http://www.macronix.com/QuickPlace/hq/PageLibrary4825740B00298A3B.nsf/h_Index/3F21BAC2E121E17848257639003A3146/$File/MX25L1605D-3205D-6405D-1.5.pdf +# + +import sigrok + +# States +IDLE = -1 + +# Chip commands (also used as additional decoder states). +CMD_WREN = 0x06 +CMD_WRDI = 0x04 +CMD_RDID = 0x9f +CMD_RDSR = 0x05 +CMD_WRSR = 0x01 +CMD_READ = 0x03 +CMD_FAST_READ = 0x0b +CMD_2READ = 0xbb +CMD_SE = 0x20 +CMD_BE = 0xd8 +CMD_CE = 0x60 +CMD_CE2 = 0xc7 +CMD_PP = 0x02 +CMD_CP = 0xad +CMD_DP = 0xb9 +# CMD_RDP = 0xab +# CMD_RES = 0xab +CMD_RDP_RES = 0xab # Note: RDP/RES have the same ID. +CMD_REMS = 0x90 +CMD_REMS2 = 0xef +CMD_ENSO = 0xb1 +CMD_EXSO = 0xc1 +CMD_RDSCUR = 0x2b +CMD_WRSCUR = 0x2f +CMD_ESRY = 0x70 +CMD_DSRY = 0x80 + +# TODO: (Short) command names as strings in a dict, too? + +# Dict which maps command IDs to their description. +cmds = { + CMD_WREN: 'Write enable', + CMD_WRDI: 'Write disable', + CMD_RDID: 'Read identification', + CMD_RDSR: 'Read status register', + CMD_WRSR: 'Write status register', + CMD_READ: 'Read data', + CMD_FAST_READ: 'Fast read data', + CMD_2READ: '2x I/O read', + CMD_SE: 'Sector erase', + CMD_BE: 'Block erase', + CMD_CE: 'Chip erase', + CMD_CE2: 'Chip erase', # Alternative command ID + CMD_PP: 'Page program', + CMD_CP: 'Continuously program mode', + CMD_DP: 'Deep power down', + # CMD_RDP: 'Release from deep powerdown', + # CMD_RES: 'Read electronic ID', + CMD_RDP_RES: 'Release from deep powerdown / Read electronic ID', + CMD_REMS: 'Read electronic manufacturer & device ID', + CMD_REMS2: 'Read ID for 2x I/O mode', + CMD_ENSO: 'Enter secured OTP', + CMD_EXSO: 'Exit secured OTP', + CMD_RDSCUR: 'Read security register', + CMD_WRSCUR: 'Write security register', + CMD_ESRY: 'Enable SO to output RY/BY#', + CMD_DSRY: 'Disable SO to output RY/BY#', +} + +device_name = { + 0x14: 'MX25L1605D', + 0x15: 'MX25L3205D', + 0x16: 'MX25L6405D', +} + +# FIXME: This is just some example input for testing purposes... + +mosi_packets = [ + # REMS + {'type': 'D', 'range': (100, 110), 'data': 0x90, 'ann': ''}, + {'type': 'D', 'range': (120, 130), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (170, 180), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (190, 200), 'data': 0x00, 'ann': ''}, + {'type': 'D', 'range': (400, 410), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (411, 421), 'data': 0xff, 'ann': ''}, + # RDID + {'type': 'D', 'range': (10, 11), 'data': 0x9f, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + # SE + {'type': 'D', 'range': (10, 11), 'data': 0x20, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0x12, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0x34, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0x56, 'ann': ''}, + # SE + {'type': 'D', 'range': (10, 11), 'data': 0x20, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0x44, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0x55, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0x66, 'ann': ''}, + # WREN + {'type': 'D', 'range': (10, 11), 'data': 0x06, 'ann': ''}, +] + +miso_packets = [ + # REMS + {'type': 'D', 'range': (100, 110), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (120, 130), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (170, 180), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (190, 200), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (400, 410), 'data': 0xc2, 'ann': ''}, + {'type': 'D', 'range': (411, 421), 'data': 0x14, 'ann': ''}, + # RDID + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0xc2, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0x20, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0x15, 'ann': ''}, + # SE + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + # SE + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, + # WREN + {'type': 'D', 'range': (10, 11), 'data': 0xff, 'ann': ''}, +] + +class Sample(): + def __init__(self, data): + self.data = data + def probe(self, probe): + s = ord(self.data[probe / 8]) & (1 << (probe % 8)) + return True if s else False + +def sampleiter(data, unitsize): + for i in range(0, len(data), unitsize): + yield(Sample(data[i:i+unitsize])) + +class Decoder(sigrok.Decoder): + id = 'mx25lxx05d' + name = 'Macronix MX25Lxx05D' + longname = 'Macronix MX25Lxx05D SPI flash chip decoder' + desc = 'Macronix MX25Lxx05D SPI flash chip decoder' + longdesc = 'TODO' + author = 'Uwe Hermann' + email = 'uwe@hermann-uwe.de' + license = 'gplv2+' + inputs = ['spi', 'spi', 'logic'] + outputs = ['mx25lxx05d'] + probes = {} # TODO: HOLD#, WP#/ACC + options = {} # TODO + + def __init__(self, **kwargs): + self.probes = Decoder.probes.copy() + self.state = IDLE + self.cmdstate = 1 # TODO + self.out = [] + + def start(self, metadata): + self.unitsize = metadata['unitsize'] + + def report(self): + pass + + def handle_wren(self, miso_packet, mosi_packet): + self.out += [{'type': self.cmd, 'range': mosi_packet['range'], + 'data': None, 'ann': cmds[self.state]}] + self.state = IDLE + + # TODO: Check/display device ID / name + def handle_rdid(self, miso_packet, mosi_packet): + ## self.state = IDLE + ## return # FIXME + + if self.cmdstate == 1: + # Byte 1: Master sends command ID. + self.start_sample = mosi_packet['range'][0] + o = [] # TODO + elif self.cmdstate == 2: + # Byte 2: Slave sends the JEDEC manufacturer ID. + o = [{'type': self.cmd, 'range': miso_packet['range'], + 'data': miso_packet['data'], 'ann': 'Manufacturer ID'}] + elif self.cmdstate == 3: + # Byte 3: Slave sends the memory type (0x20 for this chip). + o = [{'type': self.cmd, 'range': miso_packet['range'], + 'data': miso_packet['data'], 'ann': 'Memory type'}] + elif self.cmdstate == 4: + # Byte 4: Slave sends the device ID. + self.device_id = miso_packet['data'] + o = [{'type': self.cmd, 'range': miso_packet['range'], + 'data': miso_packet['data'], 'ann': 'Device ID'}] + + if self.cmdstate == 4: + # TODO: Check self.device_id is valid & exists in device_names. + # TODO: Same device ID? Check! + dev = 'Device: Macronix %s' % device_name[self.device_id] + o += [{'type': 'RDID', # TODO: self.cmd? + 'range': (self.start_sample, miso_packet['range'][1]), + 'data': None, # TODO? + 'ann': dev}] + self.state = IDLE + else: + self.cmdstate += 1 + + self.out += o + + # TODO: Warn/abort if we don't see the necessary amount of bytes. + # TODO: Warn if WREN was not seen before. + def handle_se(self, miso_packet, mosi_packet): + if self.cmdstate == 1: + # Byte 1: Master sends command ID. + self.addr = 0 + self.start_sample = mosi_packet['range'][0] + o = [{'type': self.cmd, 'range': mosi_packet['range'], + 'data': self.cmd, 'ann': 'Command ID'}] + elif self.cmdstate in (2, 3, 4): + # Bytes 2/3/4: Master sends address of the sector to erase. + # Note: Assumes SPI data is 8 bits wide (it is for MX25Lxx05D). + # TODO: LSB-first of MSB-first? + self.addr <<= 8 + self.addr |= mosi_packet['data'] + o = [] # TODO: Output 'Address byte 1' and such fields? + + if self.cmdstate == 4: + o += [{'type': self.cmd, + 'range': (self.start_sample, mosi_packet['range'][1]), + 'data': '0x%x' % self.addr, 'ann': cmds[self.state]}] + # TODO: Max. size depends on chip, check that too if possible. + if self.addr % 4096 != 0: + # Sector addresses must be 4K-aligned (same for all 3 chips). + o += [{'type': self.cmd, # TODO: Type == 'Warning' or such? + 'range': (self.start_sample, mosi_packet['range'][1]), + 'data': None, 'ann': 'Warning: Invalid sector address!'}] + self.state = IDLE + else: + self.cmdstate += 1 + + self.out += o + + def handle_rems(self, miso_packet, mosi_packet): + if self.cmdstate == 1: + # Byte 1: Master sends command ID. + self.start_sample = mosi_packet['range'][0] + o = [{'type': self.cmd, 'range': mosi_packet['range'], + 'data': self.cmd, 'ann': 'Command ID'}] + elif self.cmdstate in (2, 3): + # Bytes 2/3: Master sends two dummy bytes. + # TODO: Check dummy bytes? Check reply from device? + o = [{'type': self.cmd, 'range': mosi_packet['range'], + 'data': mosi_packet['data'], 'ann': 'Dummy byte'}] + elif self.cmdstate == 4: + # Byte 4: Master sends 0x00 or 0x01. + # 0x00: Master wants manufacturer ID as first reply byte. + # 0x01: Master wants device ID as first reply byte. + b = mosi_packet['data'] + self.manufacturer_id_first = True if (b == 0x00) else False + d = 'manufacturer' if (b == 0x00) else 'device' + o = [{'type': self.cmd, 'range': mosi_packet['range'], + 'data': b, 'ann': '%s (%s ID first)' % (cmds[self.cmd], d)}] + elif self.cmdstate == 5: + # Byte 5: Slave sends manufacturer ID (or device ID). + self.ids = [miso_packet['data']] + o = [] + elif self.cmdstate in (5, 6): + # Byte 6: Slave sends device ID (or manufacturer ID). + self.ids += [miso_packet['data']] + ann = 'Manufacturer' if self.manufacturer_id_first else 'Device' + o = [{'type': self.cmd, 'range': miso_packet['range'], + 'data': '0x%02x' % self.ids[0], 'ann': ann}] + ann = 'Device' if self.manufacturer_id_first else 'Manufacturer' + o += [{'type': self.cmd, 'range': miso_packet['range'], + 'data': '0x%02x' % self.ids[1], 'ann': '%s ID' % ann}] + else: + # TODO: Error? + pass + + if self.cmdstate == 6: + self.end_sample = miso_packet['range'][1] + id = self.ids[1] if self.manufacturer_id_first else self.ids[0] + dev = 'Device: Macronix %s' % device_name[id] + o += [{'type': self.cmd, + 'range': (self.start_sample, self.end_sample), + 'data': None, # TODO: Both IDs? Which format? + 'ann': dev}] + self.state = IDLE + else: + self.cmdstate += 1 + + self.out += o + + def decode(self, data): + self.out = [] + + # Iterate over all SPI MISO/MOSI packets. TODO: HOLD#, WP#/ACC? + for i in xrange(len(miso_packets)): + + p_miso = miso_packets[i] + p_mosi = mosi_packets[i] + + # Assumption: Every p_miso has a p_mosi entry with same range. + + # For now, skip non-data packets. + if p_mosi['type'] != 'D': + continue + + cmd = p_mosi['data'] + + # If we encountered a known chip command, enter the resp. state. + if self.state == IDLE: + if cmd in cmds: + self.state = cmd + self.cmd = cmd # TODO: Eliminate? + self.cmdstate = 1 + else: + pass # TODO + + # Handle commands. + # TODO: Use some generic way to invoke the resp. method. + if self.state == CMD_WREN: + self.handle_wren(p_miso, p_mosi) + elif self.state == CMD_SE: + self.handle_se(p_miso, p_mosi) + elif self.state == CMD_RDID: + self.handle_rdid(p_miso, p_mosi) + if self.state == CMD_REMS: + self.handle_rems(p_miso, p_mosi) + else: + pass + + if self.out != []: + self.put(self.out) +