mmc: omap: don't set wrong voltage select for mmc2

[pandora-u-boot.git] / README

diff --git a/README b/README
index b9a3685..a336476 100644 (file)
--- a/README
+++ b/README
@@ -54,6 +54,11 @@ In case of problems see the CHANGELOG and CREDITS files to find out
 who contributed the specific port. The MAINTAINERS file lists board
 maintainers.
 
 who contributed the specific port. The MAINTAINERS file lists board
 maintainers.
 

+Note: There is no CHANGELOG file in the actual U-Boot source tree;
+it can be created dynamically from the Git log using:
+
+       make CHANGELOG
+

 
 Where to get help:
 ==================
 
 Where to get help:
 ==================


@@ -611,6 +616,14 @@ The following options need to be configured:
                boot loader that has already initialized the UART.  Define this
                variable to flush the UART at init time.
 
                boot loader that has already initialized the UART.  Define this
                variable to flush the UART at init time.
 

+               CONFIG_SYS_NS16550_BROKEN_TEMT
+
+               16550 UART set the Transmitter Empty (TEMT) Bit when all output
+               has finished and the transmitter is totally empty. U-Boot waits
+               for this bit to be set to initialize the serial console. On some
+               broken platforms this bit is not set in SPL making U-Boot to
+               hang while waiting for TEMT. Define this option to avoid it.
+

 
 - Console Interface:
                Depending on board, define exactly one serial port
 
 - Console Interface:
                Depending on board, define exactly one serial port


@@ -810,6 +823,8 @@ The following options need to be configured:
                CONFIG_CMD_EDITENV        edit env variable
                CONFIG_CMD_EEPROM       * EEPROM read/write support
                CONFIG_CMD_ELF          * bootelf, bootvx
                CONFIG_CMD_EDITENV        edit env variable
                CONFIG_CMD_EEPROM       * EEPROM read/write support
                CONFIG_CMD_ELF          * bootelf, bootvx

+               CONFIG_CMD_ENV_CALLBACK * display details about env callbacks
+               CONFIG_CMD_ENV_FLAGS    * display details about env flags

                CONFIG_CMD_EXPORTENV    * export the environment
                CONFIG_CMD_EXT2         * ext2 command support
                CONFIG_CMD_EXT4         * ext4 command support
                CONFIG_CMD_EXPORTENV    * export the environment
                CONFIG_CMD_EXT2         * ext2 command support
                CONFIG_CMD_EXT4         * ext4 command support


@@ -819,8 +834,10 @@ The following options need to be configured:
                CONFIG_CMD_FDOS         * Dos diskette Support
                CONFIG_CMD_FLASH          flinfo, erase, protect
                CONFIG_CMD_FPGA           FPGA device initialization support
                CONFIG_CMD_FDOS         * Dos diskette Support
                CONFIG_CMD_FLASH          flinfo, erase, protect
                CONFIG_CMD_FPGA           FPGA device initialization support

+               CONFIG_CMD_GETTIME      * Get time since boot

                CONFIG_CMD_GO           * the 'go' command (exec code)
                CONFIG_CMD_GREPENV      * search environment
                CONFIG_CMD_GO           * the 'go' command (exec code)
                CONFIG_CMD_GREPENV      * search environment

+               CONFIG_CMD_HASH         * calculate hash / digest

                CONFIG_CMD_HWFLOW       * RTS/CTS hw flow control
                CONFIG_CMD_I2C          * I2C serial bus support
                CONFIG_CMD_IDE          * IDE harddisk support
                CONFIG_CMD_HWFLOW       * RTS/CTS hw flow control
                CONFIG_CMD_I2C          * I2C serial bus support
                CONFIG_CMD_IDE          * IDE harddisk support


@@ -840,6 +857,7 @@ The following options need to be configured:
                CONFIG_CMD_LOADS          loads
                CONFIG_CMD_MD5SUM         print md5 message digest
                                          (requires CONFIG_CMD_MEMORY and CONFIG_MD5)
                CONFIG_CMD_LOADS          loads
                CONFIG_CMD_MD5SUM         print md5 message digest
                                          (requires CONFIG_CMD_MEMORY and CONFIG_MD5)

+               CONFIG_CMD_MEMINFO      * Display detailed memory information

                CONFIG_CMD_MEMORY         md, mm, nm, mw, cp, cmp, crc, base,
                                          loop, loopw, mtest
                CONFIG_CMD_MISC           Misc functions like sleep etc
                CONFIG_CMD_MEMORY         md, mm, nm, mw, cp, cmp, crc, base,
                                          loop, loopw, mtest
                CONFIG_CMD_MISC           Misc functions like sleep etc


@@ -855,6 +873,7 @@ The following options need to be configured:
                CONFIG_CMD_PING         * send ICMP ECHO_REQUEST to network
                                          host
                CONFIG_CMD_PORTIO       * Port I/O
                CONFIG_CMD_PING         * send ICMP ECHO_REQUEST to network
                                          host
                CONFIG_CMD_PORTIO       * Port I/O

+               CONFIG_CMD_READ         * Read raw data from partition

                CONFIG_CMD_REGINFO      * Register dump
                CONFIG_CMD_RUN            run command in env variable
                CONFIG_CMD_SAVES        * save S record dump
                CONFIG_CMD_REGINFO      * Register dump
                CONFIG_CMD_RUN            run command in env variable
                CONFIG_CMD_SAVES        * save S record dump


@@ -1409,6 +1428,13 @@ CBFS (Coreboot Filesystem) support
                boot.  See the documentation file README.video for a
                description of this variable.
 
                boot.  See the documentation file README.video for a
                description of this variable.
 

+               CONFIG_VIDEO_VGA
+
+               Enable the VGA video / BIOS for x86. The alternative if you
+               are using coreboot is to use the coreboot frame buffer
+               driver.
+
+

 - Keyboard Support:
                CONFIG_KEYBOARD
 
 - Keyboard Support:
                CONFIG_KEYBOARD
 


@@ -1469,10 +1495,29 @@ CBFS (Coreboot Filesystem) support
                Normally display is black on white background; define
                CONFIG_SYS_WHITE_ON_BLACK to get it inverted.
 
                Normally display is black on white background; define
                CONFIG_SYS_WHITE_ON_BLACK to get it inverted.
 

+               CONFIG_LCD_ALIGNMENT
+
+               Normally the LCD is page-aligned (tyically 4KB). If this is
+               defined then the LCD will be aligned to this value instead.
+               For ARM it is sometimes useful to use MMU_SECTION_SIZE
+               here, since it is cheaper to change data cache settings on
+               a per-section basis.
+
+               CONFIG_CONSOLE_SCROLL_LINES
+
+               When the console need to be scrolled, this is the number of
+               lines to scroll by. It defaults to 1. Increasing this makes
+               the console jump but can help speed up operation when scrolling
+               is slow.
+

                CONFIG_LCD_BMP_RLE8
 
                Support drawing of RLE8-compressed bitmaps on the LCD.
 
                CONFIG_LCD_BMP_RLE8
 
                Support drawing of RLE8-compressed bitmaps on the LCD.
 

+               CONFIG_I2C_EDID
+
+               Enables an 'i2c edid' command which can read EDID
+               information over I2C from an attached LCD display.

 
 - Splash Screen Support: CONFIG_SPLASH_SCREEN
 
 
 - Splash Screen Support: CONFIG_SPLASH_SCREEN
 


@@ -2167,6 +2212,11 @@ CBFS (Coreboot Filesystem) support
                serial# is unaffected by this, i. e. it remains
                read-only.]
 
                serial# is unaffected by this, i. e. it remains
                read-only.]
 

+               The same can be accomplished in a more flexible way
+               for any variable by configuring the type of access
+               to allow for those variables in the ".flags" variable
+               or define CONFIG_ENV_FLAGS_LIST_STATIC.
+

 - Protected RAM:
                CONFIG_PRAM
 
 - Protected RAM:
                CONFIG_PRAM
 


@@ -2200,6 +2250,14 @@ CBFS (Coreboot Filesystem) support
                        HERMES, IP860, RPXlite, LWMON,
                        FLAGADM, TQM8260
 
                        HERMES, IP860, RPXlite, LWMON,
                        FLAGADM, TQM8260
 

+- Access to physical memory region (> 4GB)
+               Some basic support is provided for operations on memory not
+               normally accessible to U-Boot - e.g. some architectures
+               support access to more than 4GB of memory on 32-bit
+               machines using physical address extension or similar.
+               Define CONFIG_PHYSMEM to access this basic support, which
+               currently only supports clearing the memory.
+

 - Error Recovery:
                CONFIG_PANIC_HANG
 
 - Error Recovery:
                CONFIG_PANIC_HANG
 


@@ -2329,6 +2387,15 @@ CBFS (Coreboot Filesystem) support
                run-time determined information about the hardware to the
                environment.  These will be named board_name, board_rev.
 
                run-time determined information about the hardware to the
                environment.  These will be named board_name, board_rev.
 

+               CONFIG_DELAY_ENVIRONMENT
+
+               Normally the environment is loaded when the board is
+               intialised so that it is available to U-Boot. This inhibits
+               that so that the environment is not available until
+               explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL
+               this is instead controlled by the value of
+               /config/load-environment.
+

 - DataFlash Support:
                CONFIG_HAS_DATAFLASH
 
 - DataFlash Support:
                CONFIG_HAS_DATAFLASH
 


@@ -2355,6 +2422,11 @@ CBFS (Coreboot Filesystem) support
                CONFIG_SF_DEFAULT_MODE          (see include/spi.h)
                CONFIG_SF_DEFAULT_SPEED         in Hz
 
                CONFIG_SF_DEFAULT_MODE          (see include/spi.h)
                CONFIG_SF_DEFAULT_SPEED         in Hz
 

+               CONFIG_CMD_SF_TEST
+
+               Define this option to include a destructive SPI flash
+               test ('sf test').
+

 - SystemACE Support:
                CONFIG_SYSTEMACE
 
 - SystemACE Support:
                CONFIG_SYSTEMACE
 


@@ -2389,6 +2461,23 @@ CBFS (Coreboot Filesystem) support
                A better solution is to properly configure the firewall,
                but sometimes that is not allowed.
 
                A better solution is to properly configure the firewall,
                but sometimes that is not allowed.
 

+- Hashing support:
+               CONFIG_CMD_HASH
+
+               This enables a generic 'hash' command which can produce
+               hashes / digests from a few algorithms (e.g. SHA1, SHA256).
+
+               CONFIG_HASH_VERIFY
+
+               Enable the hash verify command (hash -v). This adds to code
+               size a little.
+
+               CONFIG_SHA1 - support SHA1 hashing
+               CONFIG_SHA256 - support SHA256 hashing
+
+               Note: There is also a sha1sum command, which should perhaps
+               be deprecated in favour of 'hash sha1'.
+

 - Show boot progress:
                CONFIG_SHOW_BOOT_PROGRESS
 
 - Show boot progress:
                CONFIG_SHOW_BOOT_PROGRESS
 


@@ -2625,10 +2714,13 @@ FIT uImage format:
                CONFIG_FB_ADDR
 
                Define CONFIG_FB_ADDR if you want to use specific
                CONFIG_FB_ADDR
 
                Define CONFIG_FB_ADDR if you want to use specific

-               address for frame buffer.
-               Then system will reserve the frame buffer address to
-               defined address instead of lcd_setmem (this function
-               grabs the memory for frame buffer by panel's size).
+               address for frame buffer.  This is typically the case
+               when using a graphics controller has separate video
+               memory.  U-Boot will then place the frame buffer at
+               the given address instead of dynamically reserving it
+               in system RAM by calling lcd_setmem(), which grabs
+               the memory for the frame buffer depending on the
+               configured panel size.

 
                Please see board_init_f function.
 
 
                Please see board_init_f function.
 


@@ -2923,9 +3015,6 @@ Configuration Settings:
                non page size aligned address and this could cause major
                problems.
 
                non page size aligned address and this could cause major
                problems.
 

-- CONFIG_SYS_TFTP_LOADADDR:
-               Default load address for network file downloads
-

 - CONFIG_SYS_LOADS_BAUD_CHANGE:
                Enable temporary baudrate change while serial download
 
 - CONFIG_SYS_LOADS_BAUD_CHANGE:
                Enable temporary baudrate change while serial download
 


@@ -3067,6 +3156,49 @@ Configuration Settings:
        cases. This setting can be used to tune behaviour; see
        lib/hashtable.c for details.
 
        cases. This setting can be used to tune behaviour; see
        lib/hashtable.c for details.
 

+- CONFIG_ENV_FLAGS_LIST_DEFAULT
+- CONFIG_ENV_FLAGS_LIST_STATIC
+       Enable validation of the values given to enviroment variables when
+       calling env set.  Variables can be restricted to only decimal,
+       hexadecimal, or boolean.  If CONFIG_CMD_NET is also defined,
+       the variables can also be restricted to IP address or MAC address.
+
+       The format of the list is:
+               type_attribute = [s|d|x|b|i|m]
+               access_atribute = [a|r|o|c]
+               attributes = type_attribute[access_atribute]
+               entry = variable_name[:attributes]
+               list = entry[,list]
+
+       The type attributes are:
+               s - String (default)
+               d - Decimal
+               x - Hexadecimal
+               b - Boolean ([1yYtT|0nNfF])
+               i - IP address
+               m - MAC address
+
+       The access attributes are:
+               a - Any (default)
+               r - Read-only
+               o - Write-once
+               c - Change-default
+
+       - CONFIG_ENV_FLAGS_LIST_DEFAULT
+               Define this to a list (string) to define the ".flags"
+               envirnoment variable in the default or embedded environment.
+
+       - CONFIG_ENV_FLAGS_LIST_STATIC
+               Define this to a list (string) to define validation that
+               should be done if an entry is not found in the ".flags"
+               environment variable.  To override a setting in the static
+               list, simply add an entry for the same variable name to the
+               ".flags" variable.
+
+- CONFIG_ENV_ACCESS_IGNORE_FORCE
+       If defined, don't allow the -f switch to env set override variable
+       access flags.
+

 The following definitions that deal with the placement and management
 of environment data (variable area); in general, we support the
 following configurations:
 The following definitions that deal with the placement and management
 of environment data (variable area); in general, we support the
 following configurations:


@@ -3342,6 +3474,16 @@ use the "saveenv" command to store a valid environment.
                space for already greatly restricted images, including but not
                limited to NAND_SPL configurations.
 
                space for already greatly restricted images, including but not
                limited to NAND_SPL configurations.
 

+- CONFIG_DISPLAY_BOARDINFO
+               Display information about the board that U-Boot is running on
+               when U-Boot starts up. The board function checkboard() is called
+               to do this.
+
+- CONFIG_DISPLAY_BOARDINFO_LATE
+               Similar to the previous option, but display this information
+               later, once stdio is running and output goes to the LCD, if
+               present.
+

 Low Level (hardware related) configuration options:
 ---------------------------------------------------
 
 Low Level (hardware related) configuration options:
 ---------------------------------------------------
 


@@ -3668,6 +3810,12 @@ Low Level (hardware related) configuration options:
                If defined, the x86 reset vector code is excluded. You will need
                to do this when U-Boot is running from Coreboot.
 
                If defined, the x86 reset vector code is excluded. You will need
                to do this when U-Boot is running from Coreboot.
 

+- CONFIG_X86_NO_REAL_MODE
+               If defined, x86 real mode code is omitted. This assumes a
+               32-bit environment where such code is not needed. You will
+               need to do this when U-Boot is running from Coreboot.
+
+

 Freescale QE/FMAN Firmware Support:
 -----------------------------------
 
 Freescale QE/FMAN Firmware Support:
 -----------------------------------
 


@@ -4162,6 +4310,36 @@ Please note that changes to some configuration parameters may take
 only effect after the next boot (yes, that's just like Windoze :-).
 
 
 only effect after the next boot (yes, that's just like Windoze :-).
 
 

+Callback functions for environment variables:
+---------------------------------------------
+
+For some environment variables, the behavior of u-boot needs to change
+when their values are changed.  This functionailty allows functions to
+be associated with arbitrary variables.  On creation, overwrite, or
+deletion, the callback will provide the opportunity for some side
+effect to happen or for the change to be rejected.
+
+The callbacks are named and associated with a function using the
+U_BOOT_ENV_CALLBACK macro in your board or driver code.
+
+These callbacks are associated with variables in one of two ways.  The
+static list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC
+in the board configuration to a string that defines a list of
+associations.  The list must be in the following format:
+
+       entry = variable_name[:callback_name]
+       list = entry[,list]
+
+If the callback name is not specified, then the callback is deleted.
+Spaces are also allowed anywhere in the list.
+
+Callbacks can also be associated by defining the ".callbacks" variable
+with the same list format above.  Any association in ".callbacks" will
+override any association in the static list. You can define
+CONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the
+".callbacks" envirnoment variable in the default or embedded environment.
+
+

 Command Line Parsing:
 =====================
 
 Command Line Parsing:
 =====================