srd: Each PD now has its own subdirectory.

1 files changed, 272 insertions, 0 deletions

diff --git a/decoders/mx25lxx05d/mx25lxx05d.py b/decoders/mx25lxx05d/mx25lxx05d.py
new file mode 100644
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+++ b/decoders/mx25lxx05d/mx25lxx05d.py
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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
+