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+##
+## This file is part of the sigrok project.
+##
+## Copyright (C) 2011-2012 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## 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 sigrokdecode as srd
+
+# 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',
+}
+
+class Decoder(srd.Decoder):
+ id = 'mx25lxx05d'
+ name = 'MX25Lxx05D'
+ longname = 'Macronix MX25Lxx05D'
+ desc = 'Macronix MX25Lxx05D SPI flash chip decoder'
+ longdesc = 'TODO'
+ license = 'gplv2+'
+ inputs = ['spi', 'spi', 'logic']
+ outputs = ['mx25lxx05d']
+ probes = [] # TODO: HOLD#, WP#/ACC
+ options = {} # TODO
+ annotations = [
+ ['TODO', 'TODO'],
+ ]
+
+ def __init__(self, **kwargs):
+ self.state = IDLE
+ self.cmdstate = 1 # TODO
+
+ def start(self, metadata):
+ # self.out_proto = self.add(srd.OUTPUT_PROTO, 'mx25lxx05d')
+ self.out_ann = self.add(srd.OUTPUT_ANN, 'mx25lxx05d')
+
+ def report(self):
+ pass
+
+ def putann(self, data):
+ # Simplification, most annotations span extactly one SPI byte/packet.
+ self.put(self.ss, self.es, self.out_ann, data)
+
+ def handle_wren(self, mosi, miso):
+ self.putann([0, ['Command: %s' % cmds[self.cmd]]])
+ self.state = IDLE
+
+ # TODO: Check/display device ID / name
+ def handle_rdid(self, mosi, miso):
+ if self.cmdstate == 1:
+ # Byte 1: Master sends command ID.
+ self.start_sample = self.ss
+ self.putann([0, ['Command: %s' % cmds[self.cmd]]])
+ elif self.cmdstate == 2:
+ # Byte 2: Slave sends the JEDEC manufacturer ID.
+ self.putann([0, ['Manufacturer ID: 0x%02x' % miso]])
+ elif self.cmdstate == 3:
+ # Byte 3: Slave sends the memory type (0x20 for this chip).
+ self.putann([0, ['Memory type: 0x%02x' % miso]])
+ elif self.cmdstate == 4:
+ # Byte 4: Slave sends the device ID.
+ self.device_id = miso
+ self.putann([0, ['Device ID: 0x%02x' % miso]])
+
+ if self.cmdstate == 4:
+ # TODO: Check self.device_id is valid & exists in device_names.
+ # TODO: Same device ID? Check!
+ d = 'Device: Macronix %s' % device_name[self.device_id]
+ self.put(self.start_sample, self.es, self.out_ann, [0, [d]])
+ self.state = IDLE
+ else:
+ self.cmdstate += 1
+
+ # 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, mosi, miso):
+ if self.cmdstate == 1:
+ # Byte 1: Master sends command ID.
+ self.addr = 0
+ self.start_sample = self.ss
+ self.putann([0, ['Command: %s' % cmds[self.cmd]]])
+ 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
+ self.putann([0, ['Address byte %d: 0x%02x' % (self.cmdstate - 1,
+ miso)]]) # TODO: Count from 0 or 1?
+
+ if self.cmdstate == 4:
+ d = 'Erase sector %d' % self.addr
+ self.put(self.start_sample, self.es, self.out_ann, [0, [d]])
+ # 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).
+ d = 'Warning: Invalid sector address!' # TODO: type == WARN?
+ self.put(self.start_sample, self.es, self.out_ann, [0, [d]])
+ self.state = IDLE
+ else:
+ self.cmdstate += 1
+
+ def handle_rems(self, mosi, miso):
+ if self.cmdstate == 1:
+ # Byte 1: Master sends command ID.
+ self.start_sample = self.ss
+ self.putann([0, ['Command: %s' % cmds[self.cmd]]])
+ elif self.cmdstate in (2, 3):
+ # Bytes 2/3: Master sends two dummy bytes.
+ # TODO: Check dummy bytes? Check reply from device?
+ self.putann([0, ['Dummy byte: %s' % mosi]])
+ 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.
+ self.manufacturer_id_first = True if (mosi == 0x00) else False
+ d = 'manufacturer' if (mosi == 0x00) else 'device'
+ self.putann([0, ['Master wants %s ID first' % d]])
+ elif self.cmdstate == 5:
+ # Byte 5: Slave sends manufacturer ID (or device ID).
+ self.ids = [miso]
+ d = 'Manufacturer' if self.manufacturer_id_first else 'Device'
+ self.putann([0, ['%s ID' % d]])
+ elif self.cmdstate == 6:
+ # Byte 6: Slave sends device ID (or manufacturer ID).
+ self.ids += [miso]
+ d = 'Manufacturer' if self.manufacturer_id_first else 'Device'
+ self.putann([0, ['%s ID' % d]])
+ else:
+ # TODO: Error?
+ pass
+
+ if self.cmdstate == 6:
+ self.end_sample = self.es
+ id = self.ids[1] if self.manufacturer_id_first else self.ids[0]
+ self.putann([0, ['Device: Macronix %s' % device_name[id]]])
+ self.state = IDLE
+ else:
+ self.cmdstate += 1
+
+ def handle_rdsr(self, mosi, miso):
+ self.putann([0, ['Command: %s (0x%02x)' % (cmds[self.cmd], miso)]])
+ self.state = IDLE
+
+ def decode(self, ss, es, data):
+
+ ptype, mosi, miso = data
+
+ if ptype != 'data':
+ return
+
+ cmd = mosi
+ self.ss = ss
+ self.es = es
+
+ # 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
+ else:
+ pass
+
+ # Handle commands.
+ # TODO: Use some generic way to invoke the resp. method.
+ if self.state == CMD_WREN:
+ self.handle_wren(mosi, miso)
+ elif self.state == CMD_SE:
+ self.handle_se(mosi, miso)
+ elif self.state == CMD_RDID:
+ self.handle_rdid(mosi, miso)
+ if self.state == CMD_REMS:
+ self.handle_rems(mosi, miso)
+ if self.state == CMD_RDSR:
+ self.handle_rdsr(mosi, miso)
+ else:
+ self.put(0, 0, self.out_ann, [0, ['Unknown command: 0x%02x' % cmd]])
+ self.state = IDLE
+
generated by cgit v1.2.3-70-g09d2 (git 2.47.0) at 2024-11-15 06:03:25 +0000