board/cogent/README

   1 Cogent Modular Architecture configuration
   2 -----------------------------------------
   3
   4 As the name suggests, the Cogent platform is a modular system where
   5 you have a motherboard into which plugs a cpu module and one or more
   6 i/o modules. This provides very nice flexibility, but makes the
   7 configuration task somewhat harder.
   8
   9 The possible Cogent motherboards are:
  10
  11 Code            Config Variable         Description
  12 ----            ---------------         -----------
  13
  14 CMA101          CONFIG_CMA101           32MB ram, 2 ser, 1 par, rtc, dipsw,
  15                                         2x16 lcd, eth(?)
  16 CMA102          CONFIG_CMA102           32MB ram, 2 ser, 1 par, rtc, dipsw,
  17                                         2x16 lcd
  18 CMA111          CONFIG_CMA111           32MB ram, 1MB flash, 4 ser, 1 par,
  19                                         rtc, ps/2 kbd/mse, 2x16 lcd, 2xPCI,
  20                                         10/100TP eth
  21 CMA120          CONFIG_CMA120           32MB ram, 1MB flash, 4 ser, 1 par,
  22                                         rtc, ps/2 kbd/mse, 2x16 lcd, 2xPCI,
  23                                         10/100TP eth, 2xPCMCIA, video/lcd-panel
  24 CMA150          CONFIG_CMA150           8MB ram, 1MB flash, 2 ser, 1 par, rtc,
  25                                         ps/2 kbd/mse, 2x16 lcd
  26
  27 The possible Cogent PowerPC CPU modules are:
  28
  29 Code            Config Variable         Description
  30 ----            ---------------         -----------
  31
  32 CMA278-603EV    CONFIG_CMA278_603EV     PPC603ev CPU, 66MHz clock, 512K EPROM,
  33                                         JTAG/COP
  34 CMA278-603ER    CONFIG_CMA278_603ER     PPC603er CPU, 66MHz clock, 512K EPROM,
  35                                         JTAG/COP
  36 CMA278-740      CONFIG_CMA278_740       PPC740 CPU, 66MHz clock, 512K EPROM,
  37                                         JTAG/COP
  38 CMA280-509      CONFIG_CMA280_509       MPC505/509 CPU, 50MHz clock,
  39                                         512K EPROM, BDM
  40 CMA282          CONFIG_CMA282           MPC8260 CPU, 66MHz clock, 512K EPROM,
  41                                         JTAG, 16M RAM, 1 x ser (SMC2),
  42                                         1 x 10baseT PHY (SCC4), 1 x 10/100 TP
  43                                         PHY (FCC1), 2 x 48pin DIN (FCC2 + TDM1)
  44 CMA285          CONFIG_CMA285           MPC801 CPU, 33MHz clock, 512K EPROM,
  45                                         BDM
  46 CMA286-21       CONFIG_CMA286_21        MPC821 CPU, 66MHz clock, 512K EPROM,
  47                                         BDM, 16M RAM, 2 x ser (SMC1 + SMC2),
  48                                         1 x 10baseT PHY (SCC2)
  49 CMA286-60-OLD   CONFIG_CMA286_60_OLD    MPC860 CPU, 33MHz clock, 128K EPROM,
  50                                         BDM
  51 CMA286-60       CONFIG_CMA286_60        MPC860 CPU, 66MHz clock, 512K EPROM,
  52                                         BDM, 16M RAM, 2 x ser (SMC1 + SMC2),
  53                                         1 x 10baseT PHY (SCC2)
  54 CMA286-60P      CONFIG_CMA286_60P       MPC860P CPU, 66MHz clock, 512K EPROM,
  55                                         BDM, 16M RAM, 2 x ser (SMC1 + SMC2),
  56                                         1 x 10baseT PHY (SCC2)
  57 CMA287-23       CONFIG_CMA287_23        MPC823 CPU, 33MHz clock, 512K EPROM,
  58                                         BDM
  59 CMA287-50       CONFIG_CMA287_50        MPC850 CPU, 33MHz clock, 512K EPROM,
  60                                         BDM
  61
  62 (there are a lot of other cpu modules with ARM, MIPS and M-CORE CPUs,
  63 but we'll worry about those later).
  64
  65 The possible Cogent CMA I/O Modules are:
  66
  67 Code            Config Variable         Description
  68 ----            ---------------         -----------
  69
  70 CMA302          CONFIG_CMA302           up to 16M flash, ps/2 keyboard/mouse
  71 CMA352          CONFIG_CMA352           CMAbus <=> PCI
  72
  73 Currently supported:
  74
  75         Motherboards:   CMA102
  76         CPU Modules:    CMA286-60-OLD
  77         I/O Modules:    CMA302 I/O module
  78
  79 To configure, perform the usual U-Boot configuration task of editing
  80 "include/config_cogent_mpc8xx.h" and reviewing all the options and
  81 settings in there. In particular, check the chip select values
  82 installed into the memory controller's various option and base
  83 registers - these are set by the defines CONFIG_SYS_CMA_CSn_{BASE,SIZE} and
  84 CONFIG_SYS_{B,O}Rn_PRELIM. Also be careful of the clock settings installed
  85 into the SCCR - via the define CONFIG_SYS_SCCR. Finally, decide whether you
  86 want the serial console on motherboard serial port A or on one of the
  87 8xx SMC ports, and set CONFIG_8xx_CONS_{SMC1,SMC2,NONE} accordingly
  88 (NONE means use Cogent motherboard serial port A).
  89
  90 Then edit the file "cogent/config.mk". Firstly, set TEXT_BASE to be
  91 the base address of the EPROM for the CPU module. This should be the
  92 same as the value selected for CONFIG_SYS_MONITOR_BASE in
  93 "include/config_cogent_*.h" (in fact, I have made this automatic via
  94 the -DTEXT_BASE=... option in CPPFLAGS).
  95
  96 Finally, set the values of the make variables $(CMA_MB) and $(CMA_IOMS).
  97
  98 $(CMA_MB) is the name of the directory that contains support for your
  99 motherboard. At this stage, only "cma10x" exists, which supports the
 100 CMA101 and CMA102 motherboards - but only selected devices, namely
 101 serial, lcd and dipsw.
 102
 103 $(CMA_IOMS) is a list of zero or more directories that contain
 104 support for the i/o modules you have installed. At this stage, only
 105 "cma302" exists, which supports the CMA302 flash i/o module - but
 106 only the flash part, not the ps/2 keyboard and mouse interfaces.
 107
 108 There should be a make variable for each of the above directories,
 109 which is the directory name with "_O" appended. This make variable is
 110 a list of object files to compile from that directory and include in
 111 the library.
 112
 113         e.g. cma10x_O = serial.o ...
 114
 115 That's it. Good Luck.
 116
 117 Murray.Jensen@cmst.csiro.au
 118 August 31, 2000.