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Diffstat (limited to 'doc/README.PIP405')
| -rw-r--r-- | doc/README.PIP405 | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/doc/README.PIP405 b/doc/README.PIP405 new file mode 100644 index 0000000..c5ccf18 --- /dev/null +++ b/doc/README.PIP405 @@ -0,0 +1,385 @@ +U-Boot Changes due to PIP405 Port: +=================================== + +Changed files: +============== +- MAKEALL added PIP405 +- makefile added PIP405 +- common/Makefile added Floppy disk and SCSI support +- common/board.c added PIP405, SCSI support, get_PCI_freq() +- common/bootm.c added IH_OS_U_BOOT, IH_TYPE_FIRMWARE +- common/cmd_i2c.c added "defined(CONFIG_PIP405)" +- common/cmd_ide.c changed div. functions to work with block device + description + added ATAPI support +- common/command.c added SCSI and Floppy support +- common/console.c replaced // with /* comments + added console settings from environment +- common/devices.c added ISA keyboard init +- common/main.c corrected the read of bootdelay +- cpu/ppc4xx/405gp_pci.c excluded file from PIP405 +- cpu/ppc4xx/i2c.c added 16bit read write I2C support + added page write +- cpu/ppc4xx/speed.c added get_PCI_freq +- cpu/ppc4xx/start.S added CONFIG_IDENT_STRING +- disk/Makefile added part_iso for CD support +- disk/part.c changed to work with block device description + added ISO CD support + added dev_print (was ide_print in cmd_ide.c) +- disk/part_dos.c changed to work with block device description +- disk/part_mac.c changed to work with block device description +- include/ata.h added ATAPI commands +- include/cmd_bsp.h added PIP405 commands definitions +- include/cmd_condefs.h added Floppy and SCSI support +- include/cmd_disk.h changed to work with block device description +- include/config_LANTEC.h excluded CFG_CMD_FDC and CFG_CMD_SCSI from + CONFIG_CMD_FULL +- include/config_hymod.h excluded CFG_CMD_FDC and CFG_CMD_SCSI from + CONFIG_CMD_FULL +- include/flash.h added INTEL_ID_28F320C3T 0x88C488C4 +- include/i2c.h added "defined(CONFIG_PIP405)" +- include/image.h added IH_OS_U_BOOT, IH_TYPE_FIRMWARE +- include/u-boot.h moved partitions functions definitions to part.h + added "defined(CONFIG_PIP405)" + added get_PCI_freq() definition +- rtc/Makefile added MC146818 RTC support +- tools/mkimage.c added IH_OS_U_BOOT, IH_TYPE_FIRMWARE + +Added files: +============ +- board/pip405 directory for PIP405 +- board/pip405/cmd_pip405.c board specific commands +- board/pip405/config.mk config make +- board/pip405/flash.c flash support +- board/pip405/init.s start-up +- board/pip405/kbd.c keyboard support +- board/pip405/kbd.h keyboard support +- board/pip405/Makefile Makefile +- board/pip405/pci_piix4.h southbridge definitions +- board/pip405/pci_pip405.c PCI support for PIP405 +- board/pip405/pci_pip405.h PCI support for PIP405 +- board/pip405/pip405.c PIP405 board init +- board/pip405/pip405.h PIP405 board init +- board/pip405/pip405_isa.c ISA support +- board/pip405/pip405_isa.h ISA support +- board/pip405/u-boot.lds Linker description +- board/pip405/u-boot.lds.debugLinker description debug +- board/pip405/sym53c8xx.c SYM53C810A support +- board/pip405/sym53c8xx_defs.h SYM53C810A definitions +- board/pip405/vga_table.h definitions of tables for VGA +- board/pip405/video.c CT69000 support +- board/pip405/video.h CT69000 support +- common/cmd_fdc.c Floppy disk support +- common/cmd_scsi.c SCSI support +- disk/part_iso.c ISO CD ROM support +- disk/part_iso.h ISO CD ROM support +- include/cmd_fdc.h command forFloppy disk support +- include/cmd_scsi.h command for SCSI support +- include/part.h partitions functions definitions + (was part of u-boot.h) +- include/scsi.h SCSI support +- rtc/mc146818.c MC146818 RTC support + + +New Config Switches: +==================== +For detailed description, refer to the corresponding paragraph in the +section "Changes". + +New Commands: +------------- +CFG_CMD_SCSI SCSI Support +CFG_CMF_FDC Floppy disk support + +IDE additions: +-------------- +CONFIG_IDE_RESET_ROUTINE defines that instead of a reset Pin, + the routine ide_set_reset(int idereset) is used. +ATAPI support (experimental) +---------------------------- +CONFIG_ATAPI enables ATAPI Support + +SCSI support (experimental) only SYM53C8xx supported +---------------------------------------------------- +CONFIG_SCSI_SYM53C8XX type of SCSI controller +CFG_SCSI_MAX_LUN 8 number of supported LUNs +CFG_SCSI_MAX_SCSI_ID 7 maximum SCSI ID (0..6) +CFG_SCSI_MAX_DEVICE CFG_SCSI_MAX_SCSI_ID * CFG_SCSI_MAX_LUN + maximum of Target devices (multiple LUN support + for boot) + +ISO (CD-Boot) partition support (Experimental) +---------------------------------------------- +CONFIG_ISO_PARTITION CD-boot support + +RTC +---- +CONFIG_RTC_MC146818 MC146818 RTC support + +Keyboard: +--------- +CONFIG_ISA_KEYBOARD Standard (PC-Style) Keyboard support + +Video: +------ +CONFIG_VIDEO_CT69000 Enable Chips & Technologies 69000 Video chip + CONFIG_VIDEO must be defined also + +External peripheral base address: +--------------------------------- +CFG_ISA_IO_BASE_ADDRESS address of all ISA-bus related parts + _must_ be defined for ISA-bus parts + +Identify: +--------- +CONFIG_IDENT_STRING added to the U_BOOT_VERSION String + + +I2C stuff: +---------- +CFG_EEPROM_PAGE_WRITE_ENABLE enables page write of the I2C EEPROM + CFG_EEPROM_PAGE_WRITE_BITS _must_ be + defined. + + +Environment / Console: +---------------------- + +CFG_CONSOLE_IS_IN_ENV if defined, stdin, stdout and stderr used from + the values stored in the evironment. + +CFG_CONSOLE_OVERWRITE_ROUTINE if defined, console_overwrite() decides if the + values stored in the environment or the standard + serial in/out put should be assigned to the console. + +CFG_CONSOLE_ENV_OVERWRITE if defined, the start-up console switching + are stored in the environment. + +PIP405 specific: +---------------- +CONFIG_PORT_ADDR address used to read boot configuration +MULTI_PURPOSE_SOCKET_ADDR address of the multi purpose socked +SDRAM_EEPROM_WRITE_ADDRESS addresses of the serial presence detect +SDRAM_EEPROM_READ_ADDRESS EEPROM on the SDRAM module. + + +Changes: +======== + +Added Devices: +============== + +Floppy support: +--------------- +Support of a standard floppy disk controller at address CFG_ISA_IO_BASE_ADDRESS ++ 0x3F0. Enabled with define CFG_CMD_FDC. Reads a unformated floppy disk with a +image header (see: mkimage). No interrupts and no DMA are used for this. +Added files: +- common/cmd_fdc.c +- include/cmd_fdc.h + +SCSI support: +------------- +Support for Symbios SYM53C810A chip. Implemented as follows: +- without disconnect +- only asynchrounous +- multiple LUN support (caution, needs a lot of RAM. define CFG_SCSI_MAX_LUN 1 to + save RAM) +- multiple SCSI ID support +- no write support +- analyses the MAC, DOS and ISO pratition similar to the IDE support +- allows booting from SCSI devices similar to the IDE support. +The device numbers are not assigned like they are within the IDE support. The first +device found will get the number 0, the next 1 etc. If all SCSI IDs (0..6) and all +LUNs (8) are enabled, 56 boot devices are possible. This uses a lot of RAM since the +device descriptors are not yet dynamically allocated. 56 boot devices are overkill +anyway. Please refer to the section "Todo" chapter "block device support enhancement". +The SYM53C810A uses 1 Interrupt and must be able of mastering the PCI bus. +Added files: +- common/cmd_scsi.c +- common/board.c +- include/cmd_scsi.h +- include/scsi.h +- board/pip405/sym53c8xx.c +- board/pip405/sym53c8xx_defs.h + +ATAPI support (IDE changes): +---------------------------- +Added ATAPI support (with CONFIG_ATAPI) in the file cmd_ide.c. +To support a hardreset, when the IDE reset pin is not connected to the +CFG_PC_IDE_RESET pin, the switch CONFIG_IDE_RESET_ROUTINE has been added. When +this switch is enabled the routine void ide_set_reset(int idereset) must be +within the board specific files. +Only read from ATAPI devices are supported. +Found out that the function trim_trail cuts off the last character if the whole +string is filled. Added function cpy_ident instead, which trims also leading +spaces and copies the string in the buffer. +Changed files: +- common/cmd_ide.c +- include/ata.h + +ISO partition support: +---------------------- +Added CD boot support for El-Torito bootable ISO CDs. The bootfile image must contain +the U-Boot image header. Since CDs do not have "partitions", the boot partition is 0. +The bootcatalog feature has not been tested so far. CD Boot is supported for ATAPI +("diskboot") and SCSI ("scsiboot") devices. +Added files: +- disk/iso_part.c +- disk/iso_part.h + +Block device changes: +--------------------- +To allow the use of dos_part.c, mac_part.c and iso_part.c, the parameter +block_dev_desc will be used when accessing the functions in these files. The block +device descriptor (block_dev_desc) contains a pointer to the read routine of the +device, which will be used to read blocks from the device. +Renamed function ide_print to dev_print and moved it to the file disk/part.c to use +it for IDE ATAPI and SCSI devices. +Please refer to the section "Todo" chapter "block device support enhancement". +Added files: +- include/part.h +changed files: +- disk/dos_part.c +- disk/dos_part.h +- disk/mac_part.c +- disk/mac_part.h +- disk/part.c +- common/cmd_ide.c +- include/u-boot.h + + +MC146818 RTC support: +--------------------- +Added support for MC146818 RTC with defining CONFIG_RTC_MC146818. The ISA bus IO +base address must be defined with CFG_ISA_IO_BASE_ADDRESS. +Added files: +- rtc/mc146818.c + +Standard ISA bus Keyboard support: +---------------------------------- +Added support for the standard PC kyeboard controller. For the PIP405 the superIO +controller must be set up previously. The keyboard uses the standard ISA IRQ, so +the ISA PIC must also be set up. +Added files: +- board/pip405/kbd.c +- board/pip405/kbd.h +- board/pip405/pip405_isa.c +- board/pip405/pip405_isa.h + +Chips and Technologie 69000 VGA controller support: +--------------------------------------------------- +Added support for the CT69000 VGA controller. +Added files: +- board/pip405/video.c +- board/pip405/video.h +- board/pip405/vga_table.h + + +Changed Items: +============== + +Identify: +--------- +Added the config variable CONFIG_IDENT_STRING which will be added to the +"U_BOOT_VERSION __TIME__ DATE___ " String, to allows to identify intermidiate +and custom versions. +Changed files: +- cpu/ppc4xx/start.s + +Firmware Image: +--------------- +Added IH_OS_U_BOOT and IH_TYPE_FIRMWARE to the image definitions to allows the +U-Boot update with prior CRC check. +Changed files: +- include/image.h +- tools/mkimage.c +- common/cmd_bootm.c + +Correct PCI Frequency for PPC405: +--------------------------------- +Added function (in cpu/ppc4xx/speed.c) to get the PCI frequency for PPC405 CPU. +The PCI Frequency will now be set correct in the board description in common/board.c. +(was set to the busfreq before). +Changed files: +- cpu/ppc4xx/speed.c +- common/board.c + +I2C Stuff: +---------- +Added defined(CONFIG_PIP405) at several points in common/cmd_i2c.c. +Added 16bit read/write support for I2C (PPC405), and page write to +I2C EEPROM if defined CFG_EEPROM_PAGE_WRITE_ENABLE. +Changed files: +- cpu/ppc4xx/i2c.c +- common/cmd_i2c.c + +Environment / Console: +---------------------- +Although in README.console described, the U-Boot has not assinged the values +found in the environment to the console. Corrected this behavior, but only if +CFG_CONSOLE_IS_IN_ENV is defined. +If CFG_CONSOLE_OVERWRITE_ROUTINE is defined, console_overwrite() decides if the +values stored in the environment or the standard serial in/output should be +assigned to the console. This is useful if the environment values are not correct. +If CFG_CONSOLE_ENV_OVERWRITE is defined the devices assigned to the console at +start-up time will be written to the environment. This means that if the +environment values are overwritten by the overwrite_console() routine, they will be +stored in the environment. +Changed files: +- common/console.c + +Correct bootdelay intepretation: +-------------------------------- +Changed bootdelay read from the environment from simple_strtoul (unsigned) to +simple_strtol (signed), to be able to get a bootdelay of -1. +Changed files: +- common/main.c + +Todo: +===== + +Block device support enhancement: +--------------------------------- +Consider to unify the block device handling. Instead of using diskboot for IDE, +scsiboot for SCSI and fdcboot for floppy disks, it would make sense to use only +one command ("devboot" ???) with a parameter of the desired device ("hda1", "sda1", +"fd0" ???) to boot from. The other ide commands can be handled in the same way +("dev hda read.." instead of "ide read.." or "dev sda read.." instead of +"scsi read..."). Todo this, a common way of assign a block device to its name +(first found ide device = hda, second found hdb etc., or hda is device 0 on bus 0, +hdb is device 1 on bus 0 etc.) as well as the names (hdx for ide, sdx for scsi, fx for +floppy ???) must be defined. +Maybe there are better ideas to do this. + +Console assingment: +------------------- +Consider to initialize and assign the console stdin, stdout and stderr as soon as +possible to see the boot messages also on an other console than serial. + + +Todo for PIP405: +================ + +LCD support for VGA: +-------------------- +Add LCD support for the CT69000 + +Default environment: +-------------------- +Consider to write a default environment to the OTP part of the EEPROM and use it +if the normal environment is not valid. Useful for serial# and ethaddr values. + +Watchdog: +--------- +Implement Watchdog. + +Files clean-up: +--------------- +Following files needs to be cleaned up: +- cmd_pip405.c +- flash.c +- pci_pip405.c +- pip405.c +- pip405_isa.c +Consider to split up the files in their functions. |