doc/README.spear

   1
   2 SPEAr (Structured Processor Enhanced Architecture).
   3
   4 SPEAr600 is also known as SPEArPlus and SPEAr300 is also known as SPEArBasic
   5
   6 The SPEAr SoC family embeds a customizable logic that can be programmed
   7 one-time by a customer at silicon mask level (i.e. not at runtime!).
   8
   9 U-Boot supports four SoCs: SPEAr600, SPEAr3xx
  10
  11 All 4 SoCs (SPEAr3xx and SPEAr600) share common peripherals. SPEAr300 and
  12 SPEAr600 do not have EMI.
  13
  14 1. ARM926ejs core based (sp600 has two cores, the 2nd handled only in Linux)
  15 2. FastEthernet (sp600 has Gbit version, but same controller - GMAC)
  16 3. USB Host
  17 4. USB Device
  18 5. NAND controller (FSMC)
  19 6. Serial NOR ctrl
  20 7. I2C
  21 8. SPI
  22 9. CLCD
  23 10. others ..
  24
  25 Everything is supported in Linux.
  26 u-boot is currently not supporting all peripeharls (just a few as listed below).
  27 1. USB Device
  28 2. NAND controller (FSMC)
  29 3. Serial Memory Interface
  30 4. EMI (Parallel NOR interface)
  31 4. I2C
  32 5. UART
  33
  34 Build options
  35         make spear320_config
  36                 spear320 build with environment variables placed at default
  37                 location i.e. Serial NOR device
  38         make spear320_pnor_config
  39                 This option generates a uboot image that supports emi controller
  40                 for CFI compliant parallel NOR flash. Environment variables are
  41                 placed in Parallel NOR device
  42         make spear320_nand_config
  43                 spear320 build with environment variables placed in NAND device
  44         make spear320_usbtty_config
  45                 spear320 build with usbtty terminal as default and environment
  46                 placed at default location
  47         make spear320_usbtty_pnor_config
  48                 spear320 build with usbtty terminal as default and environment
  49                 placed in pnor device
  50         make spear320_usbtty_nand_config
  51                 Build with usbtty terminal as default and environment placed in
  52                 NAND device
  53         make spear300_config
  54         make spear300_nand_config
  55         make spear300_usbtty_config
  56         make spear300_usbtty_nand_config
  57         make spear310_config
  58         make spear310_pnor_config
  59         make spear310_nand_config
  60         make spear310_usbtty_config
  61         make spear310_usbtty_pnor_config
  62         make spear310_usbtty_nand_config
  63         make spear600_config
  64         make spear600_nand_config
  65         make spear600_usbtty_config
  66         make spear600_usbtty_nand_config
  67
  68 Mac id storage and retrieval in spear platforms
  69
  70 Please read doc/README.enetaddr for the implementation guidelines for mac id
  71 usage. Basically, environment has precedence over board specific storage. The
  72 ethaddr beeing used for the network interface is always taken only from
  73 environment variables. Although, we can check the mac id programmed in i2c
  74 memory by using chip_config command