git.rot13.org Git - goodfet/blob - client/GoodFETSPI.py

   1 #!/usr/bin/env python
   2 # GoodFET SPI and SPIFlash Client Library
   3 #
   4 # (C) 2009 Travis Goodspeed <travis at radiantmachines.com>
   5 #
   6 # This code is being rewritten and refactored.  You've been warned!
   7
   8 import sys, time, string, cStringIO, struct, glob, os;
   9
  10 from GoodFET import GoodFET;
  11
  12 class GoodFETSPI(GoodFET):
  13     def SPIsetup(self):
  14         """Move the FET into the SPI application."""
  15         self.writecmd(0x01,0x10,0,self.data); #SPI/SETUP
  16
  17     def SPItrans8(self,byte):
  18         """Read and write 8 bits by SPI."""
  19         data=self.SPItrans([byte]);
  20         return ord(data[0]);
  21
  22     def SPItrans(self,data):
  23         """Exchange data by SPI."""
  24         self.data=data;
  25         self.writecmd(0x01,0x00,len(data),data);
  26         return self.data;
  27
  28 class GoodFETSPI25C(GoodFETSPI):
  29     #opcodes
  30     WREN=0x06;
  31     WRDI=0x04;
  32     RDSR=0x05;
  33     WRSR=0x01;
  34     READ=0x03;
  35     WRITE=0x02;
  36
  37     def peek8(self,adr,memory="vn"):
  38         """Read a byte from the given address."""
  39         data=self.SPItrans([self.READ,(adr>>8)&0xFF,adr&0xFF,0x00]);
  40         return ord(data[3]);
  41
  42
  43 class GoodFETSPIFlash(GoodFETSPI):
  44     JEDECmanufacturers={0xFF: "MISSING",
  45                         0xEF: "Winbond",
  46                         0xC2: "MXIC",
  47                         0x20: "Numonyx/ST",
  48                         0x1F: "Atmel",
  49                         0x01: "AMD/Spansion"
  50                         };
  51
  52     JEDECdevices={0xFFFFFF: "MISSING",
  53                   0xEF3015: "W25X16L",
  54                   0xEF3014: "W25X80L",
  55                   0xEF3013: "W25X40L",
  56                   0xEF3012: "W25X20L",
  57                   0xEF3011: "W25X10L",
  58                   0xC22017: "MX25L6405D",
  59                   0xC22016: "MX25L3205D",
  60                   0xC22015: "MX25L1605D",
  61                   0xC22014: "MX25L8005",
  62                   0xC22013: "MX25L4005",
  63                   0x204011: "M45PE10",
  64                   0x202014: "M25P80",
  65                   0x1f4501: "AT24DF081",
  66                   };
  67
  68     JEDECsizes={0x17: 0x800000,
  69                 0x16: 0x400000,
  70                 0x15: 0x200000,
  71                 0x14: 0x100000,
  72                 0x13: 0x080000,
  73                 0x12: 0x040000,
  74                 0x11: 0x020000
  75                 };
  76
  77     JEDECsize=0;
  78
  79     def SPIjedec(self):
  80         """Grab an SPI Flash ROM's JEDEC bytes.  Some chips don't implement
  81         this, such as Numonyx M25P* except in the 110nm processed."""
  82         data=[0x9f, 0, 0, 0];
  83         data=self.SPItrans(data);
  84         jedec=0;
  85         self.JEDECmanufacturer=ord(data[1]);
  86         if self.JEDECmanufacturer==0xFF:
  87             self.JEDECtype=0x20;
  88             self.JEDECcapacity=0x14;
  89             jedec=0x202014;
  90         else:
  91             self.JEDECtype=ord(data[2]);
  92             self.JEDECcapacity=ord(data[3]);
  93             jedec=(ord(data[1])<<16)+(ord(data[2])<<8)+ord(data[3]);
  94         self.JEDECsize=self.JEDECsizes.get(self.JEDECcapacity);
  95         if self.JEDECsize==None:
  96             self.JEDECsize=0;
  97
  98         if jedec==0x1F4501:
  99             self.JEDECsize=1024**2;
 100         self.JEDECdevice=jedec;
 101         return data;
 102     def SPIpeek(self,adr):
 103         """Grab a byte from an SPI Flash ROM."""
 104         data=[0x03,
 105               (adr&0xFF0000)>>16,
 106               (adr&0xFF00)>>8,
 107               adr&0xFF,
 108               0];
 109         self.SPItrans(data);
 110         return ord(self.data[4]);
 111     def SPIpeekblock(self,adr):
 112         """Grab a few block from an SPI Flash ROM.  Block size is unknown"""
 113         data=[(adr&0xFF0000)>>16,
 114               (adr&0xFF00)>>8,
 115               adr&0xFF];
 116
 117         self.writecmd(0x01,0x02,3,data);
 118         return self.data;
 119
 120     def SPIpokebyte(self,adr,val):
 121         self.SPIpokebytes(adr,[val]);
 122     def SPIpokebytes(self,adr,data):
 123         #Used to be 24 bits, BE, not 32 bits, LE.
 124         adranddata=[adr&0xFF,
 125                     (adr&0xFF00)>>8,
 126                     (adr&0xFF0000)>>16,
 127                     0, #MSB
 128                     ]+data;
 129         #print "%06x: poking %i bytes" % (adr,len(data));
 130         self.writecmd(0x01,0x03,
 131                       len(adranddata),adranddata);
 132
 133     def SPIchiperase(self):
 134         """Mass erase an SPI Flash ROM."""
 135         self.writecmd(0x01,0x81);
 136     def SPIwriteenable(self):
 137         """SPI Flash Write Enable"""
 138         data=[0x06];
 139         self.SPItrans(data);
 140
 141     def SPIjedecmanstr(self):
 142         """Grab the JEDEC manufacturer string.  Call after SPIjedec()."""
 143         man=self.JEDECmanufacturers.get(self.JEDECmanufacturer)
 144         if man==0:
 145             man="UNKNOWN";
 146         return man;
 147
 148     def SPIjedecstr(self):
 149         """Grab the JEDEC manufacturer string.  Call after SPIjedec()."""
 150         man=self.JEDECmanufacturers.get(self.JEDECmanufacturer);
 151         if man==0:
 152             man="UNKNOWN";
 153         device=self.JEDECdevices.get(self.JEDECdevice);
 154         if device==0:
 155             device="???"
 156         return "%s %s" % (man,device);
 157