README 125 KB
Newer Older
wdenk's avatar
wdenk committed
1
#
2
# (C) Copyright 2000 - 2005
wdenk's avatar
wdenk committed
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#

Summary:
========

27
This directory contains the source code for U-Boot, a boot loader for
wdenk's avatar
wdenk committed
28 29 30 31
Embedded boards based on PowerPC, ARM, MIPS and several other
processors, which can be installed in a boot ROM and used to
initialize and test the hardware or to download and run application
code.
wdenk's avatar
wdenk committed
32 33

The development of U-Boot is closely related to Linux: some parts of
34 35
the source code originate in the Linux source tree, we have some
header files in common, and special provision has been made to
wdenk's avatar
wdenk committed
36 37 38 39 40 41 42 43 44 45 46 47 48 49
support booting of Linux images.

Some attention has been paid to make this software easily
configurable and extendable. For instance, all monitor commands are
implemented with the same call interface, so that it's very easy to
add new commands. Also, instead of permanently adding rarely used
code (for instance hardware test utilities) to the monitor, you can
load and run it dynamically.


Status:
=======

In general, all boards for which a configuration option exists in the
50
Makefile have been tested to some extent and can be considered
wdenk's avatar
wdenk committed
51 52
"working". In fact, many of them are used in production systems.

53
In case of problems see the CHANGELOG and CREDITS files to find out
wdenk's avatar
wdenk committed
54 55 56 57 58 59
who contributed the specific port.


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

60 61 62 63
In case you have questions about, problems with or contributions for
U-Boot you should send a message to the U-Boot mailing list at
<u-boot-users@lists.sourceforge.net>. There is also an archive of
previous traffic on the mailing list - please search the archive
wdenk's avatar
wdenk committed
64 65 66 67 68 69 70 71
before asking FAQ's. Please see
http://lists.sourceforge.net/lists/listinfo/u-boot-users/


Where we come from:
===================

- start from 8xxrom sources
72
- create PPCBoot project (http://sourceforge.net/projects/ppcboot)
wdenk's avatar
wdenk committed
73 74 75 76 77 78 79 80
- clean up code
- make it easier to add custom boards
- make it possible to add other [PowerPC] CPUs
- extend functions, especially:
  * Provide extended interface to Linux boot loader
  * S-Record download
  * network boot
  * PCMCIA / CompactFLash / ATA disk / SCSI ... boot
81
- create ARMBoot project (http://sourceforge.net/projects/armboot)
wdenk's avatar
wdenk committed
82
- add other CPU families (starting with ARM)
83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105
- create U-Boot project (http://sourceforge.net/projects/u-boot)


Names and Spelling:
===================

The "official" name of this project is "Das U-Boot". The spelling
"U-Boot" shall be used in all written text (documentation, comments
in source files etc.). Example:

	This is the README file for the U-Boot project.

File names etc. shall be based on the string "u-boot". Examples:

	include/asm-ppc/u-boot.h

	#include <asm/u-boot.h>

Variable names, preprocessor constants etc. shall be either based on
the string "u_boot" or on "U_BOOT". Example:

	U_BOOT_VERSION		u_boot_logo
	IH_OS_U_BOOT		u_boot_hush_start
wdenk's avatar
wdenk committed
106 107


wdenk's avatar
wdenk committed
108 109 110 111 112 113 114 115 116 117 118 119
Versioning:
===========

U-Boot uses a 3 level version number containing a version, a
sub-version, and a patchlevel: "U-Boot-2.34.5" means version "2",
sub-version "34", and patchlevel "4".

The patchlevel is used to indicate certain stages of development
between released versions, i. e. officially released versions of
U-Boot will always have a patchlevel of "0".


wdenk's avatar
wdenk committed
120 121 122
Directory Hierarchy:
====================

wdenk's avatar
wdenk committed
123 124
- board		Board dependent files
- common	Misc architecture independent functions
wdenk's avatar
wdenk committed
125
- cpu		CPU specific files
wdenk's avatar
wdenk committed
126
  - 74xx_7xx	Files specific to Freescale MPC74xx and 7xx CPUs
wdenk's avatar
wdenk committed
127 128
  - arm720t	Files specific to ARM 720 CPUs
  - arm920t	Files specific to ARM 920 CPUs
wdenk's avatar
wdenk committed
129
    - at91rm9200 Files specific to Atmel AT91RM9200 CPU
wdenk's avatar
wdenk committed
130
    - imx	Files specific to Freescale MC9328 i.MX CPUs
wdenk's avatar
wdenk committed
131
    - s3c24x0	Files specific to Samsung S3C24X0 CPUs
wdenk's avatar
wdenk committed
132 133
  - arm925t	Files specific to ARM 925 CPUs
  - arm926ejs	Files specific to ARM 926 CPUs
134
  - arm1136	Files specific to ARM 1136 CPUs
135
  - at32ap	Files specific to Atmel AVR32 AP CPUs
wdenk's avatar
wdenk committed
136 137
  - i386	Files specific to i386 CPUs
  - ixp		Files specific to Intel XScale IXP CPUs
wdenk's avatar
wdenk committed
138
  - mcf52x2	Files specific to Freescale ColdFire MCF52x2 CPUs
wdenk's avatar
wdenk committed
139
  - mips	Files specific to MIPS CPUs
wdenk's avatar
wdenk committed
140 141 142 143 144 145 146
  - mpc5xx	Files specific to Freescale MPC5xx  CPUs
  - mpc5xxx	Files specific to Freescale MPC5xxx CPUs
  - mpc8xx	Files specific to Freescale MPC8xx  CPUs
  - mpc8220	Files specific to Freescale MPC8220 CPUs
  - mpc824x	Files specific to Freescale MPC824x CPUs
  - mpc8260	Files specific to Freescale MPC8260 CPUs
  - mpc85xx	Files specific to Freescale MPC85xx CPUs
wdenk's avatar
wdenk committed
147
  - nios	Files specific to Altera NIOS CPUs
wdenk's avatar
wdenk committed
148
  - nios2	Files specific to Altera Nios-II CPUs
Wolfgang Denk's avatar
Wolfgang Denk committed
149
  - ppc4xx	Files specific to AMCC PowerPC 4xx CPUs
wdenk's avatar
wdenk committed
150 151 152
  - pxa		Files specific to Intel XScale PXA CPUs
  - s3c44b0	Files specific to Samsung S3C44B0 CPUs
  - sa1100	Files specific to Intel StrongARM SA1100 CPUs
wdenk's avatar
wdenk committed
153 154
- disk		Code for disk drive partition handling
- doc		Documentation (don't expect too much)
wdenk's avatar
wdenk committed
155
- drivers	Commonly used device drivers
wdenk's avatar
wdenk committed
156 157 158
- dtt		Digital Thermometer and Thermostat drivers
- examples	Example code for standalone applications, etc.
- include	Header Files
wdenk's avatar
wdenk committed
159
- lib_arm	Files generic to ARM	 architecture
Wolfgang Denk's avatar
Wolfgang Denk committed
160
- lib_avr32	Files generic to AVR32	 architecture
wdenk's avatar
wdenk committed
161 162 163 164 165 166
- lib_generic	Files generic to all	 architectures
- lib_i386	Files generic to i386	 architecture
- lib_m68k	Files generic to m68k	 architecture
- lib_mips	Files generic to MIPS	 architecture
- lib_nios	Files generic to NIOS	 architecture
- lib_ppc	Files generic to PowerPC architecture
167
- libfdt 	Library files to support flattened device trees
wdenk's avatar
wdenk committed
168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
- net		Networking code
- post		Power On Self Test
- rtc		Real Time Clock drivers
- tools		Tools to build S-Record or U-Boot images, etc.

Software Configuration:
=======================

Configuration is usually done using C preprocessor defines; the
rationale behind that is to avoid dead code whenever possible.

There are two classes of configuration variables:

* Configuration _OPTIONS_:
  These are selectable by the user and have names beginning with
  "CONFIG_".

* Configuration _SETTINGS_:
  These depend on the hardware etc. and should not be meddled with if
  you don't know what you're doing; they have names beginning with
  "CFG_".

Later we will add a configuration tool - probably similar to or even
identical to what's used for the Linux kernel. Right now, we have to
do the configuration by hand, which means creating some symbolic
links and editing some configuration files. We use the TQM8xxL boards
as an example here.


Selection of Processor Architecture and Board Type:
---------------------------------------------------

For all supported boards there are ready-to-use default
configurations available; just type "make <board_name>_config".

Example: For a TQM823L module type:

	cd u-boot
	make TQM823L_config

For the Cogent platform, you need to specify the cpu type as well;
e.g. "make cogent_mpc8xx_config". And also configure the cogent
directory according to the instructions in cogent/README.


Configuration Options:
----------------------

Configuration depends on the combination of board and CPU type; all
such information is kept in a configuration file
"include/configs/<board_name>.h".

Example: For a TQM823L module, all configuration settings are in
"include/configs/TQM823L.h".


wdenk's avatar
wdenk committed
224 225 226 227 228
Many of the options are named exactly as the corresponding Linux
kernel configuration options. The intention is to make it easier to
build a config tool - later.


wdenk's avatar
wdenk committed
229 230 231 232 233 234 235
The following options need to be configured:

- CPU Type:	Define exactly one of

		PowerPC based CPUs:
		-------------------
		CONFIG_MPC823,	CONFIG_MPC850,	CONFIG_MPC855,	CONFIG_MPC860
236
	or	CONFIG_MPC5xx
wdenk's avatar
wdenk committed
237
	or	CONFIG_MPC8220
wdenk's avatar
wdenk committed
238
	or	CONFIG_MPC824X, CONFIG_MPC8260
239
	or	CONFIG_MPC85xx
wdenk's avatar
wdenk committed
240 241
	or	CONFIG_IOP480
	or	CONFIG_405GP
242
	or	CONFIG_405EP
wdenk's avatar
wdenk committed
243 244
	or	CONFIG_440
	or	CONFIG_MPC74xx
wdenk's avatar
wdenk committed
245
	or	CONFIG_750FX
wdenk's avatar
wdenk committed
246 247 248 249 250 251

		ARM based CPUs:
		---------------
		CONFIG_SA1110
		CONFIG_ARM7
		CONFIG_PXA250
252
		CONFIG_PXA27X
253
		CONFIG_CPU_MONAHANS
wdenk's avatar
wdenk committed
254

wdenk's avatar
wdenk committed
255 256
		MicroBlaze based CPUs:
		----------------------
wdenk's avatar
wdenk committed
257
		CONFIG_MICROBLAZE
wdenk's avatar
wdenk committed
258

wdenk's avatar
wdenk committed
259 260 261 262
		Nios-2 based CPUs:
		----------------------
		CONFIG_NIOS2

263 264 265
		AVR32 based CPUs:
		----------------------
		CONFIG_AT32AP
wdenk's avatar
wdenk committed
266 267 268 269 270 271

- Board Type:	Define exactly one of

		PowerPC based boards:
		---------------------

272 273 274 275 276 277 278
		CONFIG_ADCIOP		CONFIG_FPS860L		CONFIG_OXC
		CONFIG_ADS860		CONFIG_GEN860T		CONFIG_PCI405
		CONFIG_AMX860		CONFIG_GENIETV		CONFIG_PCIPPC2
		CONFIG_AP1000		CONFIG_GTH		CONFIG_PCIPPC6
		CONFIG_AR405		CONFIG_gw8260		CONFIG_pcu_e
		CONFIG_BAB7xx		CONFIG_hermes		CONFIG_PIP405
		CONFIG_BC3450		CONFIG_hymod		CONFIG_PM826
279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309
		CONFIG_c2mon		CONFIG_IAD210		CONFIG_ppmc8260
		CONFIG_CANBT		CONFIG_ICU862		CONFIG_QS823
		CONFIG_CCM		CONFIG_IP860		CONFIG_QS850
		CONFIG_CMI		CONFIG_IPHASE4539	CONFIG_QS860T
		CONFIG_cogent_mpc8260	CONFIG_IVML24		CONFIG_RBC823
		CONFIG_cogent_mpc8xx	CONFIG_IVML24_128	CONFIG_RPXClassic
		CONFIG_CPCI405		CONFIG_IVML24_256	CONFIG_RPXlite
		CONFIG_CPCI4052		CONFIG_IVMS8		CONFIG_RPXsuper
		CONFIG_CPCIISER4	CONFIG_IVMS8_128	CONFIG_rsdproto
		CONFIG_CPU86		CONFIG_IVMS8_256	CONFIG_sacsng
		CONFIG_CRAYL1		CONFIG_JSE		CONFIG_Sandpoint8240
		CONFIG_CSB272		CONFIG_LANTEC		CONFIG_Sandpoint8245
		CONFIG_CU824		CONFIG_LITE5200B	CONFIG_sbc8260
		CONFIG_DASA_SIM		CONFIG_lwmon		CONFIG_sbc8560
		CONFIG_DB64360		CONFIG_MBX		CONFIG_SM850
		CONFIG_DB64460		CONFIG_MBX860T		CONFIG_SPD823TS
		CONFIG_DU405		CONFIG_MHPC		CONFIG_STXGP3
		CONFIG_DUET_ADS		CONFIG_MIP405		CONFIG_SXNI855T
		CONFIG_EBONY		CONFIG_MOUSSE		CONFIG_TQM823L
		CONFIG_ELPPC		CONFIG_MPC8260ADS	CONFIG_TQM8260
		CONFIG_ELPT860		CONFIG_MPC8540ADS	CONFIG_TQM850L
		CONFIG_ep8260		CONFIG_MPC8540EVAL	CONFIG_TQM855L
		CONFIG_ERIC		CONFIG_MPC8560ADS	CONFIG_TQM860L
		CONFIG_ESTEEM192E	CONFIG_MUSENKI		CONFIG_TTTech
		CONFIG_ETX094		CONFIG_MVS1		CONFIG_UTX8245
		CONFIG_EVB64260		CONFIG_NETPHONE		CONFIG_V37
		CONFIG_FADS823		CONFIG_NETTA		CONFIG_W7OLMC
		CONFIG_FADS850SAR	CONFIG_NETVIA		CONFIG_W7OLMG
		CONFIG_FADS860T		CONFIG_NX823		CONFIG_WALNUT
		CONFIG_FLAGADM		CONFIG_OCRTC		CONFIG_ZPC1900
		CONFIG_FPS850L		CONFIG_ORSG		CONFIG_ZUMA
310

wdenk's avatar
wdenk committed
311 312 313
		ARM based boards:
		-----------------

314
		CONFIG_ARMADILLO,	CONFIG_AT91RM9200DK,	CONFIG_CERF250,
315
		CONFIG_CSB637,		CONFIG_DELTA,		CONFIG_DNP1110,
Wolfgang Denk's avatar
Wolfgang Denk committed
316
		CONFIG_EP7312,		CONFIG_H2_OMAP1610,	CONFIG_HHP_CRADLE,
Wolfgang Denk's avatar
Wolfgang Denk committed
317
		CONFIG_IMPA7,	    CONFIG_INNOVATOROMAP1510,	CONFIG_INNOVATOROMAP1610,
318 319
		CONFIG_KB9202,		CONFIG_LART,		CONFIG_LPD7A400,
		CONFIG_LUBBOCK,		CONFIG_OSK_OMAP5912,	CONFIG_OMAP2420H4,
320 321 322
		CONFIG_PLEB2,		CONFIG_SHANNON,		CONFIG_P2_OMAP730,
		CONFIG_SMDK2400,	CONFIG_SMDK2410,	CONFIG_TRAB,
		CONFIG_VCMA9
wdenk's avatar
wdenk committed
323

wdenk's avatar
wdenk committed
324 325 326 327 328
		MicroBlaze based boards:
		------------------------

		CONFIG_SUZAKU

wdenk's avatar
wdenk committed
329 330 331 332
		Nios-2 based boards:
		------------------------

		CONFIG_PCI5441 CONFIG_PK1C20
333
		CONFIG_EP1C20 CONFIG_EP1S10 CONFIG_EP1S40
wdenk's avatar
wdenk committed
334

335 336 337 338 339 340 341 342 343
		AVR32 based boards:
		-------------------

		CONFIG_ATSTK1000

- CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined)
		Define exactly one of
		CONFIG_ATSTK1002

wdenk's avatar
wdenk committed
344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365

- CPU Module Type: (if CONFIG_COGENT is defined)
		Define exactly one of
		CONFIG_CMA286_60_OLD
--- FIXME --- not tested yet:
		CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P,
		CONFIG_CMA287_23, CONFIG_CMA287_50

- Motherboard Type: (if CONFIG_COGENT is defined)
		Define exactly one of
		CONFIG_CMA101, CONFIG_CMA102

- Motherboard I/O Modules: (if CONFIG_COGENT is defined)
		Define one or more of
		CONFIG_CMA302

- Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined)
		Define one or more of
		CONFIG_LCD_HEARTBEAT	- update a character position on
					  the lcd display every second with
					  a "rotator" |\-/|\-/

wdenk's avatar
wdenk committed
366 367 368 369
- Board flavour: (if CONFIG_MPC8260ADS is defined)
		CONFIG_ADSTYPE
		Possible values are:
			CFG_8260ADS	- original MPC8260ADS
370
			CFG_8266ADS	- MPC8266ADS
wdenk's avatar
wdenk committed
371
			CFG_PQ2FADS	- PQ2FADS-ZU or PQ2FADS-VR
372
			CFG_8272ADS	- MPC8272ADS
wdenk's avatar
wdenk committed
373

wdenk's avatar
wdenk committed
374
- MPC824X Family Member (if CONFIG_MPC824X is defined)
wdenk's avatar
wdenk committed
375 376
		Define exactly one of
		CONFIG_MPC8240, CONFIG_MPC8245
wdenk's avatar
wdenk committed
377

378
- 8xx CPU Options: (if using an MPC8xx cpu)
wdenk's avatar
wdenk committed
379 380
		CONFIG_8xx_GCLK_FREQ	- deprecated: CPU clock if
					  get_gclk_freq() cannot work
wdenk's avatar
wdenk committed
381 382
					  e.g. if there is no 32KHz
					  reference PIT/RTC clock
wdenk's avatar
wdenk committed
383 384
		CONFIG_8xx_OSCLK	- PLL input clock (either EXTCLK
					  or XTAL/EXTAL)
wdenk's avatar
wdenk committed
385

wdenk's avatar
wdenk committed
386 387 388 389
- 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU):
		CFG_8xx_CPUCLK_MIN
		CFG_8xx_CPUCLK_MAX
		CONFIG_8xx_CPUCLK_DEFAULT
390 391 392 393
			See doc/README.MPC866

		CFG_MEASURE_CPUCLK

wdenk's avatar
wdenk committed
394 395 396 397 398
		Define this to measure the actual CPU clock instead
		of relying on the correctness of the configured
		values. Mostly useful for board bringup to make sure
		the PLL is locked at the intended frequency. Note
		that this requires a (stable) reference clock (32 kHz
wdenk's avatar
wdenk committed
399
		RTC clock or CFG_8XX_XIN)
400

401 402 403 404 405 406 407 408
- Intel Monahans options:
		CFG_MONAHANS_RUN_MODE_OSC_RATIO

		Defines the Monahans run mode to oscillator
		ratio. Valid values are 8, 16, 24, 31. The core
		frequency is this value multiplied by 13 MHz.

		CFG_MONAHANS_TURBO_RUN_MODE_RATIO
Wolfgang Denk's avatar
Wolfgang Denk committed
409

410 411
		Defines the Monahans turbo mode to oscillator
		ratio. Valid values are 1 (default if undefined) and
Wolfgang Denk's avatar
Wolfgang Denk committed
412
		2. The core frequency as calculated above is multiplied
413
		by this value.
Wolfgang Denk's avatar
Wolfgang Denk committed
414

wdenk's avatar
wdenk committed
415
- Linux Kernel Interface:
wdenk's avatar
wdenk committed
416 417 418 419 420 421 422 423 424 425 426 427 428
		CONFIG_CLOCKS_IN_MHZ

		U-Boot stores all clock information in Hz
		internally. For binary compatibility with older Linux
		kernels (which expect the clocks passed in the
		bd_info data to be in MHz) the environment variable
		"clocks_in_mhz" can be defined so that U-Boot
		converts clock data to MHZ before passing it to the
		Linux kernel.
		When CONFIG_CLOCKS_IN_MHZ is defined, a definition of
		"clocks_in_mhz=1" is  automatically  included  in  the
		default environment.

wdenk's avatar
wdenk committed
429 430 431 432 433 434
		CONFIG_MEMSIZE_IN_BYTES		[relevant for MIPS only]

		When transfering memsize parameter to linux, some versions
		expect it to be in bytes, others in MB.
		Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes.

435
		CONFIG_OF_LIBFDT / CONFIG_OF_FLAT_TREE
436 437

		New kernel versions are expecting firmware settings to be
438 439 440 441 442 443 444 445 446 447 448 449 450 451
		passed using flattened device trees (based on open firmware
		concepts).

		CONFIG_OF_LIBFDT
		 * New libfdt-based support
		 * Adds the "fdt" command
		 * The bootm command does _not_ modify the fdt

		CONFIG_OF_FLAT_TREE
		 * Deprecated, see CONFIG_OF_LIBFDT
		 * Original ft_build.c-based support
		 * Automatically modifies the dft as part of the bootm command
		 * The environment variable "disable_of", when set,
		     disables this functionality.
452 453 454 455 456 457

		CONFIG_OF_FLAT_TREE_MAX_SIZE

		The maximum size of the constructed OF tree.

		OF_CPU - The proper name of the cpus node.
Kumar Gala's avatar
Kumar Gala committed
458
		OF_SOC - The proper name of the soc node.
459
		OF_TBCLK - The timebase frequency.
Kumar Gala's avatar
Kumar Gala committed
460
		OF_STDOUT_PATH - The path to the console device
461

462 463
		CONFIG_OF_HAS_BD_T

464 465 466 467
		 * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command
		 * CONFIG_OF_FLAT_TREE - The resulting flat device tree
		     will have a copy of the bd_t.  Space should be
		     pre-allocated in the dts for the bd_t.
468 469

		CONFIG_OF_HAS_UBOOT_ENV
470

471 472 473
		 * CONFIG_OF_LIBFDT - enables the "fdt bd_t" command
		 * CONFIG_OF_FLAT_TREE - The resulting flat device tree
		     will have a copy of u-boot's environment variables
474

475 476 477 478
		CONFIG_OF_BOARD_SETUP

		Board code has addition modification that it wants to make
		to the flat device tree before handing it off to the kernel
479

480 481 482 483 484
		CONFIG_OF_BOOT_CPU

		This define fills in the correct boot cpu in the boot
		param header, the default value is zero if undefined.

wdenk's avatar
wdenk committed
485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505
- Serial Ports:
		CFG_PL010_SERIAL

		Define this if you want support for Amba PrimeCell PL010 UARTs.

		CFG_PL011_SERIAL

		Define this if you want support for Amba PrimeCell PL011 UARTs.

		CONFIG_PL011_CLOCK

		If you have Amba PrimeCell PL011 UARTs, set this variable to
		the clock speed of the UARTs.

		CONFIG_PL01x_PORTS

		If you have Amba PrimeCell PL010 or PL011 UARTs on your board,
		define this to a list of base addresses for each (supported)
		port. See e.g. include/configs/versatile.h


wdenk's avatar
wdenk committed
506
- Console Interface:
507 508 509 510
		Depending on board, define exactly one serial port
		(like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2,
		CONFIG_8xx_CONS_SCC1, ...), or switch off the serial
		console by defining CONFIG_8xx_CONS_NONE
wdenk's avatar
wdenk committed
511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527

		Note: if CONFIG_8xx_CONS_NONE is defined, the serial
		port routines must be defined elsewhere
		(i.e. serial_init(), serial_getc(), ...)

		CONFIG_CFB_CONSOLE
		Enables console device for a color framebuffer. Needs following
		defines (cf. smiLynxEM, i8042, board/eltec/bab7xx)
			VIDEO_FB_LITTLE_ENDIAN	graphic memory organisation
						(default big endian)
			VIDEO_HW_RECTFILL	graphic chip supports
						rectangle fill
						(cf. smiLynxEM)
			VIDEO_HW_BITBLT		graphic chip supports
						bit-blit (cf. smiLynxEM)
			VIDEO_VISIBLE_COLS	visible pixel columns
						(cols=pitch)
wdenk's avatar
wdenk committed
528 529
			VIDEO_VISIBLE_ROWS	visible pixel rows
			VIDEO_PIXEL_SIZE	bytes per pixel
wdenk's avatar
wdenk committed
530 531
			VIDEO_DATA_FORMAT	graphic data format
						(0-5, cf. cfb_console.c)
wdenk's avatar
wdenk committed
532
			VIDEO_FB_ADRS		framebuffer address
wdenk's avatar
wdenk committed
533 534 535 536 537 538 539 540 541 542 543 544 545 546 547
			VIDEO_KBD_INIT_FCT	keyboard int fct
						(i.e. i8042_kbd_init())
			VIDEO_TSTC_FCT		test char fct
						(i.e. i8042_tstc)
			VIDEO_GETC_FCT		get char fct
						(i.e. i8042_getc)
			CONFIG_CONSOLE_CURSOR	cursor drawing on/off
						(requires blink timer
						cf. i8042.c)
			CFG_CONSOLE_BLINK_COUNT blink interval (cf. i8042.c)
			CONFIG_CONSOLE_TIME	display time/date info in
						upper right corner
						(requires CFG_CMD_DATE)
			CONFIG_VIDEO_LOGO	display Linux logo in
						upper left corner
548 549 550
			CONFIG_VIDEO_BMP_LOGO	use bmp_logo.h instead of
						linux_logo.h for logo.
						Requires CONFIG_VIDEO_LOGO
wdenk's avatar
wdenk committed
551 552 553 554
			CONFIG_CONSOLE_EXTRA_INFO
						addional board info beside
						the logo

555 556 557
		When CONFIG_CFB_CONSOLE is defined, video console is
		default i/o. Serial console can be forced with
		environment 'console=serial'.
wdenk's avatar
wdenk committed
558

wdenk's avatar
wdenk committed
559 560 561 562
		When CONFIG_SILENT_CONSOLE is defined, all console
		messages (by U-Boot and Linux!) can be silenced with
		the "silent" environment variable. See
		doc/README.silent for more information.
wdenk's avatar
wdenk committed
563

wdenk's avatar
wdenk committed
564 565 566 567
- Console Baudrate:
		CONFIG_BAUDRATE - in bps
		Select one of the baudrates listed in
		CFG_BAUDRATE_TABLE, see below.
wdenk's avatar
wdenk committed
568
		CFG_BRGCLK_PRESCALE, baudrate prescale
wdenk's avatar
wdenk committed
569 570 571 572 573 574 575 576 577 578

- Interrupt driven serial port input:
		CONFIG_SERIAL_SOFTWARE_FIFO

		PPC405GP only.
		Use an interrupt handler for receiving data on the
		serial port. It also enables using hardware handshake
		(RTS/CTS) and UART's built-in FIFO. Set the number of
		bytes the interrupt driven input buffer should have.

579 580
		Leave undefined to disable this feature, including
		disable the buffer and hardware handshake.
wdenk's avatar
wdenk committed
581

stroese's avatar
stroese committed
582 583 584
- Console UART Number:
		CONFIG_UART1_CONSOLE

Wolfgang Denk's avatar
Wolfgang Denk committed
585
		AMCC PPC4xx only.
stroese's avatar
stroese committed
586 587 588
		If defined internal UART1 (and not UART0) is used
		as default U-Boot console.

wdenk's avatar
wdenk committed
589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613
- Boot Delay:	CONFIG_BOOTDELAY - in seconds
		Delay before automatically booting the default image;
		set to -1 to disable autoboot.

		See doc/README.autoboot for these options that
		work with CONFIG_BOOTDELAY. None are required.
		CONFIG_BOOT_RETRY_TIME
		CONFIG_BOOT_RETRY_MIN
		CONFIG_AUTOBOOT_KEYED
		CONFIG_AUTOBOOT_PROMPT
		CONFIG_AUTOBOOT_DELAY_STR
		CONFIG_AUTOBOOT_STOP_STR
		CONFIG_AUTOBOOT_DELAY_STR2
		CONFIG_AUTOBOOT_STOP_STR2
		CONFIG_ZERO_BOOTDELAY_CHECK
		CONFIG_RESET_TO_RETRY

- Autoboot Command:
		CONFIG_BOOTCOMMAND
		Only needed when CONFIG_BOOTDELAY is enabled;
		define a command string that is automatically executed
		when no character is read on the console interface
		within "Boot Delay" after reset.

		CONFIG_BOOTARGS
614 615 616
		This can be used to pass arguments to the bootm
		command. The value of CONFIG_BOOTARGS goes into the
		environment value "bootargs".
wdenk's avatar
wdenk committed
617 618

		CONFIG_RAMBOOT and CONFIG_NFSBOOT
619 620 621 622
		The value of these goes into the environment as
		"ramboot" and "nfsboot" respectively, and can be used
		as a convenience, when switching between booting from
		ram and nfs.
wdenk's avatar
wdenk committed
623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664

- Pre-Boot Commands:
		CONFIG_PREBOOT

		When this option is #defined, the existence of the
		environment variable "preboot" will be checked
		immediately before starting the CONFIG_BOOTDELAY
		countdown and/or running the auto-boot command resp.
		entering interactive mode.

		This feature is especially useful when "preboot" is
		automatically generated or modified. For an example
		see the LWMON board specific code: here "preboot" is
		modified when the user holds down a certain
		combination of keys on the (special) keyboard when
		booting the systems

- Serial Download Echo Mode:
		CONFIG_LOADS_ECHO
		If defined to 1, all characters received during a
		serial download (using the "loads" command) are
		echoed back. This might be needed by some terminal
		emulations (like "cu"), but may as well just take
		time on others. This setting #define's the initial
		value of the "loads_echo" environment variable.

- Kgdb Serial Baudrate: (if CFG_CMD_KGDB is defined)
		CONFIG_KGDB_BAUDRATE
		Select one of the baudrates listed in
		CFG_BAUDRATE_TABLE, see below.

- Monitor Functions:
		CONFIG_COMMANDS
		Most monitor functions can be selected (or
		de-selected) by adjusting the definition of
		CONFIG_COMMANDS; to select individual functions,
		#define CONFIG_COMMANDS by "OR"ing any of the
		following values:

		#define enables commands:
		-------------------------
		CFG_CMD_ASKENV	* ask for env variable
wdenk's avatar
wdenk committed
665
		CFG_CMD_AUTOSCRIPT Autoscript Support
wdenk's avatar
wdenk committed
666
		CFG_CMD_BDI	  bdinfo
wdenk's avatar
wdenk committed
667
		CFG_CMD_BEDBUG	* Include BedBug Debugger
wdenk's avatar
wdenk committed
668
		CFG_CMD_BMP	* BMP support
wdenk's avatar
wdenk committed
669
		CFG_CMD_BSP	* Board specific commands
wdenk's avatar
wdenk committed
670
		CFG_CMD_BOOTD	  bootd
wdenk's avatar
wdenk committed
671
		CFG_CMD_CACHE	* icache, dcache
wdenk's avatar
wdenk committed
672 673
		CFG_CMD_CONSOLE	  coninfo
		CFG_CMD_DATE	* support for RTC, date/time...
wdenk's avatar
wdenk committed
674
		CFG_CMD_DHCP	* DHCP support
wdenk's avatar
wdenk committed
675 676
		CFG_CMD_DIAG	* Diagnostics
		CFG_CMD_DOC	* Disk-On-Chip Support
wdenk's avatar
wdenk committed
677
		CFG_CMD_DTT	* Digital Therm and Thermostat
678
		CFG_CMD_ECHO	  echo arguments
wdenk's avatar
wdenk committed
679
		CFG_CMD_EEPROM	* EEPROM read/write support
wdenk's avatar
wdenk committed
680
		CFG_CMD_ELF	* bootelf, bootvx
wdenk's avatar
wdenk committed
681 682
		CFG_CMD_ENV	  saveenv
		CFG_CMD_FDC	* Floppy Disk Support
wdenk's avatar
wdenk committed
683
		CFG_CMD_FAT	* FAT partition support
684
		CFG_CMD_FDOS	* Dos diskette Support
wdenk's avatar
wdenk committed
685 686
		CFG_CMD_FLASH	  flinfo, erase, protect
		CFG_CMD_FPGA	  FPGA device initialization support
wdenk's avatar
wdenk committed
687
		CFG_CMD_HWFLOW	* RTS/CTS hw flow control
wdenk's avatar
wdenk committed
688 689 690
		CFG_CMD_I2C	* I2C serial bus support
		CFG_CMD_IDE	* IDE harddisk support
		CFG_CMD_IMI	  iminfo
wdenk's avatar
wdenk committed
691
		CFG_CMD_IMLS	  List all found images
wdenk's avatar
wdenk committed
692 693
		CFG_CMD_IMMAP	* IMMR dump support
		CFG_CMD_IRQ	* irqinfo
wdenk's avatar
wdenk committed
694
		CFG_CMD_ITEST	  Integer/string test of 2 values
wdenk's avatar
wdenk committed
695
		CFG_CMD_JFFS2	* JFFS2 Support
wdenk's avatar
wdenk committed
696 697 698 699
		CFG_CMD_KGDB	* kgdb
		CFG_CMD_LOADB	  loadb
		CFG_CMD_LOADS	  loads
		CFG_CMD_MEMORY	  md, mm, nm, mw, cp, cmp, crc, base,
wdenk's avatar
wdenk committed
700
				  loop, loopw, mtest
wdenk's avatar
wdenk committed
701
		CFG_CMD_MISC	  Misc functions like sleep etc
wdenk's avatar
wdenk committed
702 703
		CFG_CMD_MMC	* MMC memory mapped support
		CFG_CMD_MII	* MII utility commands
wdenk's avatar
wdenk committed
704
		CFG_CMD_NAND	* NAND support
wdenk's avatar
wdenk committed
705 706 707
		CFG_CMD_NET	  bootp, tftpboot, rarpboot
		CFG_CMD_PCI	* pciinfo
		CFG_CMD_PCMCIA	* PCMCIA support
wdenk's avatar
wdenk committed
708 709
		CFG_CMD_PING	* send ICMP ECHO_REQUEST to network host
		CFG_CMD_PORTIO	* Port I/O
wdenk's avatar
wdenk committed
710 711
		CFG_CMD_REGINFO * Register dump
		CFG_CMD_RUN	  run command in env variable
wdenk's avatar
wdenk committed
712
		CFG_CMD_SAVES	* save S record dump
wdenk's avatar
wdenk committed
713
		CFG_CMD_SCSI	* SCSI Support
wdenk's avatar
wdenk committed
714
		CFG_CMD_SDRAM	* print SDRAM configuration information
715
				  (requires CFG_CMD_I2C)
wdenk's avatar
wdenk committed
716 717 718
		CFG_CMD_SETGETDCR Support for DCR Register access (4xx only)
		CFG_CMD_SPI	* SPI serial bus support
		CFG_CMD_USB	* USB support
wdenk's avatar
wdenk committed
719
		CFG_CMD_VFD	* VFD support (TRAB)
wdenk's avatar
wdenk committed
720
		CFG_CMD_BSP	* Board SPecific functions
721
		CFG_CMD_CDP	* Cisco Discover Protocol support
Michal Simek's avatar
Michal Simek committed
722
		CFG_CMD_FSL	* Microblaze FSL support
wdenk's avatar
wdenk committed
723 724 725
		-----------------------------------------------
		CFG_CMD_ALL	all

wdenk's avatar
wdenk committed
726
		CONFIG_CMD_DFL	Default configuration; at the moment
wdenk's avatar
wdenk committed
727 728 729 730 731
				this is includes all commands, except
				the ones marked with "*" in the list
				above.

		If you don't define CONFIG_COMMANDS it defaults to
wdenk's avatar
wdenk committed
732
		CONFIG_CMD_DFL in include/cmd_confdefs.h. A board can
wdenk's avatar
wdenk committed
733 734 735 736 737 738 739 740
		override the default settings in the respective
		include file.

		EXAMPLE: If you want all functions except of network
		support you can write:

		#define CONFIG_COMMANDS (CFG_CMD_ALL & ~CFG_CMD_NET)

741 742
	Other Commands:
		fdt (flattened device tree) command: CONFIG_OF_LIBFDT
wdenk's avatar
wdenk committed
743 744

	Note:	Don't enable the "icache" and "dcache" commands
745 746 747 748 749 750 751
		(configuration option CFG_CMD_CACHE) unless you know
		what you (and your U-Boot users) are doing. Data
		cache cannot be enabled on systems like the 8xx or
		8260 (where accesses to the IMMR region must be
		uncached), and it cannot be disabled on all other
		systems where we (mis-) use the data cache to hold an
		initial stack and some data.
wdenk's avatar
wdenk committed
752 753 754 755 756 757 758


		XXX - this list needs to get updated!

- Watchdog:
		CONFIG_WATCHDOG
		If this variable is defined, it enables watchdog
wdenk's avatar
wdenk committed
759
		support. There must be support in the platform specific
wdenk's avatar
wdenk committed
760 761 762 763
		code for a watchdog. For the 8xx and 8260 CPUs, the
		SIU Watchdog feature is enabled in the SYPCR
		register.

764 765 766 767 768 769 770
- U-Boot Version:
		CONFIG_VERSION_VARIABLE
		If this variable is defined, an environment variable
		named "ver" is created by U-Boot showing the U-Boot
		version as printed by the "version" command.
		This variable is readonly.

wdenk's avatar
wdenk committed
771 772 773 774 775 776 777 778 779
- Real-Time Clock:

		When CFG_CMD_DATE is selected, the type of the RTC
		has to be selected, too. Define exactly one of the
		following options:

		CONFIG_RTC_MPC8xx	- use internal RTC of MPC8xx
		CONFIG_RTC_PCF8563	- use Philips PCF8563 RTC
		CONFIG_RTC_MC146818	- use MC146818 RTC
wdenk's avatar
wdenk committed
780
		CONFIG_RTC_DS1307	- use Maxim, Inc. DS1307 RTC
wdenk's avatar
wdenk committed
781
		CONFIG_RTC_DS1337	- use Maxim, Inc. DS1337 RTC
782
		CONFIG_RTC_DS1338	- use Maxim, Inc. DS1338 RTC
wdenk's avatar
wdenk committed
783
		CONFIG_RTC_DS164x	- use Dallas DS164x RTC
wdenk's avatar
wdenk committed
784
		CONFIG_RTC_MAX6900	- use Maxim, Inc. MAX6900 RTC
wdenk's avatar
wdenk committed
785

wdenk's avatar
wdenk committed
786 787 788
		Note that if the RTC uses I2C, then the I2C interface
		must also be configured. See I2C Support, below.

wdenk's avatar
wdenk committed
789 790
- Timestamp Support:

791 792 793 794
		When CONFIG_TIMESTAMP is selected, the timestamp
		(date and time) of an image is printed by image
		commands like bootm or iminfo. This option is
		automatically enabled when you select CFG_CMD_DATE .
wdenk's avatar
wdenk committed
795 796 797 798 799 800 801 802 803 804

- Partition Support:
		CONFIG_MAC_PARTITION and/or CONFIG_DOS_PARTITION
		and/or CONFIG_ISO_PARTITION

		If IDE or SCSI support	is  enabled  (CFG_CMD_IDE  or
		CFG_CMD_SCSI) you must configure support for at least
		one partition type as well.

- IDE Reset method:
wdenk's avatar
wdenk committed
805 806
		CONFIG_IDE_RESET_ROUTINE - this is defined in several
		board configurations files but used nowhere!
wdenk's avatar
wdenk committed
807

wdenk's avatar
wdenk committed
808 809 810 811
		CONFIG_IDE_RESET - is this is defined, IDE Reset will
		be performed by calling the function
			ide_set_reset(int reset)
		which has to be defined in a board specific file
wdenk's avatar
wdenk committed
812 813 814 815 816 817

- ATAPI Support:
		CONFIG_ATAPI

		Set this to enable ATAPI support.

818 819 820 821 822 823 824 825 826 827 828 829
- LBA48 Support
		CONFIG_LBA48

		Set this to enable support for disks larger than 137GB
		Also look at CFG_64BIT_LBA ,CFG_64BIT_VSPRINTF and CFG_64BIT_STRTOUL
		Whithout these , LBA48 support uses 32bit variables and will 'only'
		support disks up to 2.1TB.

		CFG_64BIT_LBA:
			When enabled, makes the IDE subsystem use 64bit sector addresses.
			Default is 32bit.

wdenk's avatar
wdenk committed
830 831 832 833 834 835 836 837 838 839 840 841 842
- SCSI Support:
		At the moment only there is only support for the
		SYM53C8XX SCSI controller; define
		CONFIG_SCSI_SYM53C8XX to enable it.

		CFG_SCSI_MAX_LUN [8], CFG_SCSI_MAX_SCSI_ID [7] and
		CFG_SCSI_MAX_DEVICE [CFG_SCSI_MAX_SCSI_ID *
		CFG_SCSI_MAX_LUN] can be adjusted to define the
		maximum numbers of LUNs, SCSI ID's and target
		devices.
		CFG_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz)

- NETWORK Support (PCI):
843 844
		CONFIG_E1000
		Support for Intel 8254x gigabit chips.
stroese's avatar
stroese committed
845

wdenk's avatar
wdenk committed
846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861
		CONFIG_EEPRO100
		Support for Intel 82557/82559/82559ER chips.
		Optional CONFIG_EEPRO100_SROM_WRITE enables eeprom
		write routine for first time initialisation.

		CONFIG_TULIP
		Support for Digital 2114x chips.
		Optional CONFIG_TULIP_SELECT_MEDIA for board specific
		modem chip initialisation (KS8761/QS6611).

		CONFIG_NATSEMI
		Support for National dp83815 chips.

		CONFIG_NS8382X
		Support for National dp8382[01] gigabit chips.

wdenk's avatar
wdenk committed
862 863 864 865 866 867 868 869 870 871 872 873
- NETWORK Support (other):

		CONFIG_DRIVER_LAN91C96
		Support for SMSC's LAN91C96 chips.

			CONFIG_LAN91C96_BASE
			Define this to hold the physical address
			of the LAN91C96's I/O space

			CONFIG_LAN91C96_USE_32_BIT
			Define this to enable 32 bit addressing

wdenk's avatar
wdenk committed
874 875 876 877 878 879 880 881 882 883 884 885 886 887
		CONFIG_DRIVER_SMC91111
		Support for SMSC's LAN91C111 chip

			CONFIG_SMC91111_BASE
			Define this to hold the physical address
			of the device (I/O space)

			CONFIG_SMC_USE_32_BIT
			Define this if data bus is 32 bits

			CONFIG_SMC_USE_IOFUNCS
			Define this to use i/o functions instead of macros
			(some hardware wont work with macros)

wdenk's avatar
wdenk committed
888 889
- USB Support:
		At the moment only the UHCI host controller is
wdenk's avatar
wdenk committed
890
		supported (PIP405, MIP405, MPC5200); define
wdenk's avatar
wdenk committed
891 892
		CONFIG_USB_UHCI to enable it.
		define CONFIG_USB_KEYBOARD to enable the USB Keyboard
wdenk's avatar
wdenk committed
893
		and define CONFIG_USB_STORAGE to enable the USB
wdenk's avatar
wdenk committed
894 895 896 897
		storage devices.
		Note:
		Supported are USB Keyboards and USB Floppy drives
		(TEAC FD-05PUB).
wdenk's avatar
wdenk committed
898 899 900 901 902 903 904
		MPC5200 USB requires additional defines:
			CONFIG_USB_CLOCK
				for 528 MHz Clock: 0x0001bbbb
			CONFIG_USB_CONFIG
				for differential drivers: 0x00001000
				for single ended drivers: 0x00005000

Wolfgang Denk's avatar
Wolfgang Denk committed
905 906 907 908 909 910 911
- USB Device:
		Define the below if you wish to use the USB console.
		Once firmware is rebuilt from a serial console issue the
		command "setenv stdin usbtty; setenv stdout usbtty" and
		attach your usb cable. The Unix command "dmesg" should print
		it has found a new device. The environment variable usbtty
		can be set to gserial or cdc_acm to enable your device to
Wolfgang Denk's avatar
Wolfgang Denk committed
912
		appear to a USB host as a Linux gserial device or a
Wolfgang Denk's avatar
Wolfgang Denk committed
913 914 915 916 917 918 919
		Common Device Class Abstract Control Model serial device.
		If you select usbtty = gserial you should be able to enumerate
		a Linux host by
		# modprobe usbserial vendor=0xVendorID product=0xProductID
		else if using cdc_acm, simply setting the environment
		variable usbtty to be cdc_acm should suffice. The following
		might be defined in YourBoardName.h
Wolfgang Denk's avatar
Wolfgang Denk committed
920

Wolfgang Denk's avatar
Wolfgang Denk committed
921 922 923 924 925 926
			CONFIG_USB_DEVICE
			Define this to build a UDC device

			CONFIG_USB_TTY
			Define this to have a tty type of device available to
			talk to the UDC device
Wolfgang Denk's avatar
Wolfgang Denk committed
927

Wolfgang Denk's avatar
Wolfgang Denk committed
928 929 930 931 932 933 934
			CFG_CONSOLE_IS_IN_ENV
			Define this if you want stdin, stdout &/or stderr to
			be set to usbtty.

			mpc8xx:
				CFG_USB_EXTC_CLK 0xBLAH
				Derive USB clock from external clock "blah"
Wolfgang Denk's avatar
Wolfgang Denk committed
935 936
				- CFG_USB_EXTC_CLK 0x02

Wolfgang Denk's avatar
Wolfgang Denk committed
937 938 939 940
				CFG_USB_BRG_CLK 0xBLAH
				Derive USB clock from brgclk
				- CFG_USB_BRG_CLK 0x04

Wolfgang Denk's avatar
Wolfgang Denk committed
941
		If you have a USB-IF assigned VendorID then you may wish to
Wolfgang Denk's avatar
Wolfgang Denk committed
942
		define your own vendor specific values either in BoardName.h
Wolfgang Denk's avatar
Wolfgang Denk committed
943
		or directly in usbd_vendor_info.h. If you don't define
Wolfgang Denk's avatar
Wolfgang Denk committed
944 945 946 947 948 949 950
		CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME,
		CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot
		should pretend to be a Linux device to it's target host.

			CONFIG_USBD_MANUFACTURER
			Define this string as the name of your company for
			- CONFIG_USBD_MANUFACTURER "my company"
Wolfgang Denk's avatar
Wolfgang Denk committed
951

Wolfgang Denk's avatar
Wolfgang Denk committed
952 953 954 955 956 957 958 959 960
			CONFIG_USBD_PRODUCT_NAME
			Define this string as the name of your product
			- CONFIG_USBD_PRODUCT_NAME "acme usb device"

			CONFIG_USBD_VENDORID
			Define this as your assigned Vendor ID from the USB
			Implementors Forum. This *must* be a genuine Vendor ID
			to avoid polluting the USB namespace.
			- CONFIG_USBD_VENDORID 0xFFFF
Wolfgang Denk's avatar
Wolfgang Denk committed
961

Wolfgang Denk's avatar
Wolfgang Denk committed
962 963 964 965
			CONFIG_USBD_PRODUCTID
			Define this as the unique Product ID
			for your device
			- CONFIG_USBD_PRODUCTID 0xFFFF
Wolfgang Denk's avatar
Wolfgang Denk committed
966

wdenk's avatar
wdenk committed
967

968
- MMC Support:
wdenk's avatar
wdenk committed
969 970 971
		The MMC controller on the Intel PXA is supported. To
		enable this define CONFIG_MMC. The MMC can be
		accessed from the boot prompt by mapping the device
972 973
		to physical memory similar to flash. Command line is
		enabled with CFG_CMD_MMC. The MMC driver also works with
wdenk's avatar
wdenk committed
974
		the FAT fs. This is enabled with CFG_CMD_FAT.
975

wdenk's avatar
wdenk committed
976 977 978 979 980 981 982 983 984 985 986 987 988 989
- Journaling Flash filesystem support:
		CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE,
		CONFIG_JFFS2_NAND_DEV
		Define these for a default partition on a NAND device

		CFG_JFFS2_FIRST_SECTOR,
		CFG_JFFS2_FIRST_BANK, CFG_JFFS2_NUM_BANKS
		Define these for a default partition on a NOR device

		CFG_JFFS_CUSTOM_PART
		Define this to create an own partition. You have to provide a
		function struct part_info* jffs2_part_info(int part_num)

		If you define only one JFFS2 partition you may also want to
wdenk's avatar
wdenk committed
990
		#define CFG_JFFS_SINGLE_PART	1
wdenk's avatar
wdenk committed
991 992 993
		to disable the command chpart. This is the default when you
		have not defined a custom partition

wdenk's avatar
wdenk committed
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016
- Keyboard Support:
		CONFIG_ISA_KEYBOARD

		Define this to enable standard (PC-Style) keyboard
		support

		CONFIG_I8042_KBD
		Standard PC keyboard driver with US (is default) and
		GERMAN key layout (switch via environment 'keymap=de') support.
		Export function i8042_kbd_init, i8042_tstc and i8042_getc
		for cfb_console. Supports cursor blinking.

- Video support:
		CONFIG_VIDEO

		Define this to enable video support (for output to
		video).

		CONFIG_VIDEO_CT69000

		Enable Chips & Technologies 69000 Video chip

		CONFIG_VIDEO_SMI_LYNXEM
wdenk's avatar
wdenk committed
1017
		Enable Silicon Motion SMI 712/710/810 Video chip. The
wdenk's avatar
wdenk committed
1018 1019 1020 1021
		video output is selected via environment 'videoout'
		(1 = LCD and 2 = CRT). If videoout is undefined, CRT is
		assumed.

wdenk's avatar
wdenk committed
1022 1023
		For the CT69000 and SMI_LYNXEM drivers, videomode is
		selected via environment 'videomode'. Two diferent ways
wdenk's avatar
wdenk committed
1024 1025
		are possible:
		- "videomode=num"   'num' is a standard LiLo mode numbers.
wdenk's avatar
wdenk committed
1026
		Following standard modes are supported	(* is default):
wdenk's avatar
wdenk committed
1027 1028 1029 1030 1031 1032 1033 1034

		      Colors	640x480 800x600 1024x768 1152x864 1280x1024
		-------------+---------------------------------------------
		      8 bits |	0x301*	0x303	 0x305	  0x161	    0x307
		     15 bits |	0x310	0x313	 0x316	  0x162	    0x319
		     16 bits |	0x311	0x314	 0x317	  0x163	    0x31A
		     24 bits |	0x312	0x315	 0x318	    ?	    0x31B
		-------------+---------------------------------------------
wdenk's avatar
wdenk committed
1035 1036
		(i.e. setenv videomode 317; saveenv; reset;)

wdenk's avatar
wdenk committed
1037
		- "videomode=bootargs" all the video parameters are parsed
wdenk's avatar
wdenk committed
1038 1039 1040
		from the bootargs. (See drivers/videomodes.c)


1041
		CONFIG_VIDEO_SED13806
1042
		Enable Epson SED13806 driver. This driver supports 8bpp
1043 1044 1045
		and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP
		or CONFIG_VIDEO_SED13806_16BPP

1046
- Keyboard Support:
wdenk's avatar
wdenk committed
1047
		CONFIG_KEYBOARD
1048

wdenk's avatar
wdenk committed
1049 1050 1051 1052
		Define this to enable a custom keyboard support.
		This simply calls drv_keyboard_init() which must be
		defined in your board-specific files.
		The only board using this so far is RBC823.
1053

wdenk's avatar
wdenk committed
1054 1055 1056 1057 1058 1059
- LCD Support:	CONFIG_LCD

		Define this to enable LCD support (for output to LCD
		display); also select one of the supported displays
		by defining one of these:

wdenk's avatar
wdenk committed
1060
		CONFIG_NEC_NL6448AC33:
wdenk's avatar
wdenk committed
1061

wdenk's avatar
wdenk committed
1062
			NEC NL6448AC33-18. Active, color, single scan.
wdenk's avatar
wdenk committed
1063

wdenk's avatar
wdenk committed
1064
		CONFIG_NEC_NL6448BC20
wdenk's avatar
wdenk committed
1065

wdenk's avatar
wdenk committed
1066 1067 1068 1069 1070 1071
			NEC NL6448BC20-08. 6.5", 640x480.
			Active, color, single scan.

		CONFIG_NEC_NL6448BC33_54

			NEC NL6448BC33-54. 10.4", 640x480.
wdenk's avatar
wdenk committed
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
			Active, color, single scan.

		CONFIG_SHARP_16x9

			Sharp 320x240. Active, color, single scan.
			It isn't 16x9, and I am not sure what it is.

		CONFIG_SHARP_LQ64D341

			Sharp LQ64D341 display, 640x480.
			Active, color, single scan.

		CONFIG_HLD1045

			HLD1045 display, 640x480.
			Active, color, single scan.

		CONFIG_OPTREX_BW

			Optrex	 CBL50840-2 NF-FW 99 22 M5
			or
			Hitachi	 LMG6912RPFC-00T
			or
			Hitachi	 SP14Q002

			320x240. Black & white.

		Normally display is black on white background; define
		CFG_WHITE_ON_BLACK to get it inverted.

wdenk's avatar
wdenk committed
1102
- Splash Screen Support: CONFIG_SPLASH_SCREEN
1103

wdenk's avatar
wdenk committed
1104 1105 1106
		If this option is set, the environment is checked for
		a variable "splashimage". If found, the usual display
		of logo, copyright and system information on the LCD
1107
		is suppressed and the BMP image at the address
wdenk's avatar
wdenk committed
1108 1109 1110 1111
		specified in "splashimage" is loaded instead. The
		console is redirected to the "nulldev", too. This
		allows for a "silent" boot where a splash screen is
		loaded very quickly after power-on.
1112

1113 1114 1115 1116 1117 1118
- Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP

		If this option is set, additionally to standard BMP
		images, gzipped BMP images can be displayed via the
		splashscreen support or the bmp command.

wdenk's avatar
wdenk committed
1119 1120 1121 1122 1123 1124 1125
- Compression support:
		CONFIG_BZIP2

		If this option is set, support for bzip2 compressed
		images is included. If not, only uncompressed and gzip
		compressed images are supported.

1126 1127 1128
		NOTE: the bzip2 algorithm requires a lot of RAM, so
		the malloc area (as defined by CFG_MALLOC_LEN) should
		be at least 4MB.
1129

wdenk's avatar
wdenk committed
1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155
- MII/PHY support:
		CONFIG_PHY_ADDR

		The address of PHY on MII bus.

		CONFIG_PHY_CLOCK_FREQ (ppc4xx)

		The clock frequency of the MII bus

		CONFIG_PHY_GIGE

		If this option is set, support for speed/duplex
		detection of Gigabit PHY is included.

		CONFIG_PHY_RESET_DELAY

		Some PHY like Intel LXT971A need extra delay after
		reset before any MII register access is possible.
		For such PHY, set this option to the usec delay
		required. (minimum 300usec for LXT971A)

		CONFIG_PHY_CMD_DELAY (ppc4xx)

		Some PHY like Intel LXT971A need extra delay after
		command issued before MII status register can be read

wdenk's avatar
wdenk committed
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196
- Ethernet address:
		CONFIG_ETHADDR
		CONFIG_ETH2ADDR
		CONFIG_ETH3ADDR

		Define a default value for ethernet address to use
		for the respective ethernet interface, in case this
		is not determined automatically.

- IP address:
		CONFIG_IPADDR

		Define a default value for the IP address to use for
		the default ethernet interface, in case this is not
		determined through e.g. bootp.

- Server IP address:
		CONFIG_SERVERIP

		Defines a default value for theIP address of a TFTP
		server to contact when using the "tftboot" command.

- BOOTP Recovery Mode:
		CONFIG_BOOTP_RANDOM_DELAY

		If you have many targets in a network that try to
		boot using BOOTP, you may want to avoid that all
		systems send out BOOTP requests at precisely the same
		moment (which would happen for instance at recovery
		from a power failure, when all systems will try to
		boot, thus flooding the BOOTP server. Defining
		CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be
		inserted before sending out BOOTP requests. The
		following delays are insterted then:

		1st BOOTP request:	delay 0 ... 1 sec
		2nd BOOTP request:	delay 0 ... 2 sec
		3rd BOOTP request:	delay 0 ... 4 sec
		4th and following
		BOOTP requests:		delay 0 ... 8 sec

1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219
- DHCP Advanced Options:
		CONFIG_BOOTP_MASK

		You can fine tune the DHCP functionality by adding
		these flags to the CONFIG_BOOTP_MASK define:

		CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS
		serverip from a DHCP server, it is possible that more
		than one DNS serverip is offered to the client.
		If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS
		serverip will be stored in the additional environment
		variable "dnsip2". The first DNS serverip is always
		stored in the variable "dnsip", when CONFIG_BOOTP_DNS
		is added to the CONFIG_BOOTP_MASK.

		CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable
		to do a dynamic update of a DNS server. To do this, they
		need the hostname of the DHCP requester.
		If CONFIG_BOOP_SEND_HOSTNAME is added to the
		CONFIG_BOOTP_MASK, the content of the "hostname"
		environment variable is passed as option 12 to
		the DHCP server.

1220
 - CDP Options:
wdenk's avatar
wdenk committed
1221
		CONFIG_CDP_DEVICE_ID
1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261

		The device id used in CDP trigger frames.

		CONFIG_CDP_DEVICE_ID_PREFIX

		A two character string which is prefixed to the MAC address
		of the device.

		CONFIG_CDP_PORT_ID

		A printf format string which contains the ascii name of
		the port. Normally is set to "eth%d" which sets
		eth0 for the first ethernet, eth1 for the second etc.

		CONFIG_CDP_CAPABILITIES

		A 32bit integer which indicates the device capabilities;
		0x00000010 for a normal host which does not forwards.

		CONFIG_CDP_VERSION

		An ascii string containing the version of the software.

		CONFIG_CDP_PLATFORM

		An ascii string containing the name of the platform.

		CONFIG_CDP_TRIGGER

		A 32bit integer sent on the trigger.

		CONFIG_CDP_POWER_CONSUMPTION

		A 16bit integer containing the power consumption of the
		device in .1 of milliwatts.

		CONFIG_CDP_APPLIANCE_VLAN_TYPE

		A byte containing the id of the VLAN.

wdenk's avatar
wdenk committed
1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280
- Status LED:	CONFIG_STATUS_LED

		Several configurations allow to display the current
		status using a LED. For instance, the LED will blink
		fast while running U-Boot code, stop blinking as
		soon as a reply to a BOOTP request was received, and
		start blinking slow once the Linux kernel is running
		(supported by a status LED driver in the Linux
		kernel). Defining CONFIG_STATUS_LED enables this
		feature in U-Boot.

- CAN Support:	CONFIG_CAN_DRIVER

		Defining CONFIG_CAN_DRIVER enables CAN driver support
		on those systems that support this (optional)
		feature, like the TQM8xxL modules.

- I2C Support:	CONFIG_HARD_I2C | CONFIG_SOFT_I2C

wdenk's avatar
wdenk committed
1281
		These enable I2C serial bus commands. Defining either of
1282 1283
		(but not both of) CONFIG_HARD_I2C or CONFIG_SOFT_I2C will
		include the appropriate I2C driver for the selected cpu.
wdenk's avatar
wdenk committed
1284

1285 1286
		This will allow you to use i2c commands at the u-boot
		command line (as long as you set CFG_CMD_I2C in
wdenk's avatar
wdenk committed
1287 1288
		CONFIG_COMMANDS) and communicate with i2c based realtime
		clock chips. See common/cmd_i2c.c for a description of the
1289
		command line interface.
wdenk's avatar
wdenk committed
1290

1291 1292 1293 1294 1295 1296
		CONFIG_I2C_CMD_TREE is a recommended option that places
		all I2C commands under a single 'i2c' root command.  The
		older 'imm', 'imd', 'iprobe' etc. commands are considered
		deprecated and may disappear in the future.

		CONFIG_HARD_I2C selects a hardware I2C controller.
wdenk's avatar
wdenk committed
1297

1298
		CONFIG_SOFT_I2C configures u-boot to use a software (aka
wdenk's avatar
wdenk committed
1299 1300
		bit-banging) driver instead of CPM or similar hardware
		support for I2C.
wdenk's avatar
wdenk committed
1301

1302
		There are several other quantities that must also be
wdenk's avatar
wdenk committed
1303
		defined when you define CONFIG_HARD_I2C or CONFIG_SOFT_I2C.
wdenk's avatar
wdenk committed
1304

wdenk's avatar
wdenk committed
1305
		In both cases you will need to define CFG_I2C_SPEED
1306 1307 1308 1309
		to be the frequency (in Hz) at which you wish your i2c bus
		to run and CFG_I2C_SLAVE to be the address of this node (ie
		the cpu's i2c node address).

wdenk's avatar
wdenk committed
1310 1311 1312
		Now, the u-boot i2c code for the mpc8xx (cpu/mpc8xx/i2c.c)
		sets the cpu up as a master node and so its address should
		therefore be cleared to 0 (See, eg, MPC823e User's Manual
1313
		p.16-473). So, set CFG_I2C_SLAVE to 0.
wdenk's avatar
wdenk committed
1314

1315
		That's all that's required for CONFIG_HARD_I2C.
wdenk's avatar
wdenk committed
1316

wdenk's avatar
wdenk committed
1317 1318 1319
		If you use the software i2c interface (CONFIG_SOFT_I2C)
		then the following macros need to be defined (examples are
		from include/configs/lwmon.h):
wdenk's avatar
wdenk committed
1320 1321 1322

		I2C_INIT

wdenk's avatar
wdenk committed
1323
		(Optional). Any commands necessary to enable the I2C
1324
		controller or configure ports.
wdenk's avatar
wdenk committed
1325

wdenk's avatar
wdenk committed
1326
		eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |=	PB_SCL)
wdenk's avatar
wdenk committed
1327

wdenk's avatar
wdenk committed
1328 1329
		I2C_PORT

1330 1331 1332
		(Only for MPC8260 CPU). The I/O port to use (the code
		assumes both bits are on the same port). Valid values
		are 0..3 for ports A..D.
wdenk's avatar
wdenk committed
1333 1334 1335 1336 1337 1338 1339

		I2C_ACTIVE

		The code necessary to make the I2C data line active
		(driven).  If the data line is open collector, this
		define can be null.

wdenk's avatar
wdenk committed
1340 1341
		eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |=  PB_SDA)

wdenk's avatar
wdenk committed
1342 1343 1344 1345 1346 1347
		I2C_TRISTATE

		The code necessary to make the I2C data line tri-stated
		(inactive).  If the data line is open collector, this
		define can be null.

wdenk's avatar
wdenk committed
1348 1349
		eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA)

wdenk's avatar
wdenk committed
1350 1351 1352 1353 1354
		I2C_READ

		Code that returns TRUE if the I2C data line is high,
		FALSE if it is low.

wdenk's avatar
wdenk committed
1355 1356
		eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0)

wdenk's avatar
wdenk committed
1357 1358 1359 1360 1361
		I2C_SDA(bit)

		If <bit> is TRUE, sets the I2C data line high. If it
		is FALSE, it clears it (low).

wdenk's avatar
wdenk committed
1362
		eg: #define I2C_SDA(bit) \
wdenk's avatar
wdenk committed
1363
			if(bit) immr->im_cpm.cp_pbdat |=  PB_SDA; \
wdenk's avatar
wdenk committed
1364
			else	immr->im_cpm.cp_pbdat &= ~PB_SDA
wdenk's avatar
wdenk committed
1365

wdenk's avatar
wdenk committed
1366 1367 1368 1369 1370
		I2C_SCL(bit)

		If <bit> is TRUE, sets the I2C clock line high. If it
		is FALSE, it clears it (low).

wdenk's avatar
wdenk committed
1371
		eg: #define I2C_SCL(bit) \
wdenk's avatar
wdenk committed
1372
			if(bit) immr->im_cpm.cp_pbdat |=  PB_SCL; \
wdenk's avatar
wdenk committed
1373
			else	immr->im_cpm.cp_pbdat &= ~PB_SCL
wdenk's avatar
wdenk committed
1374

wdenk's avatar
wdenk committed
1375 1376 1377 1378
		I2C_DELAY

		This delay is invoked four times per clock cycle so this
		controls the rate of data transfer.  The data rate thus
wdenk's avatar
wdenk committed
1379
		is 1 / (I2C_DELAY * 4). Often defined to be something
1380 1381
		like:

wdenk's avatar
wdenk committed
1382
		#define I2C_DELAY  udelay(2)
wdenk's avatar
wdenk committed
1383

1384 1385
		CFG_I2C_INIT_BOARD

wdenk's avatar
wdenk committed
1386 1387 1388 1389 1390 1391 1392 1393
		When a board is reset during an i2c bus transfer
		chips might think that the current transfer is still
		in progress. On some boards it is possible to access
		the i2c SCLK line directly, either by using the
		processor pin as a GPIO or by having a second pin
		connected to the bus. If this option is defined a
		custom i2c_init_board() routine in boards/xxx/board.c
		is run early in the boot sequence.
1394

wdenk's avatar
wdenk committed
1395 1396 1397 1398 1399 1400
		CONFIG_I2CFAST (PPC405GP|PPC405EP only)

		This option enables configuration of bi_iic_fast[] flags
		in u-boot bd_info structure based on u-boot environment
		variable "i2cfast". (see also i2cfast)

1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425
		CONFIG_I2C_MULTI_BUS

		This option allows the use of multiple I2C buses, each of which
		must have a controller.  At any point in time, only one bus is
		active.  To switch to a different bus, use the 'i2c dev' command.
		Note that bus numbering is zero-based.

		CFG_I2C_NOPROBES

		This option specifies a list of I2C devices that will be skipped
		when the 'i2c probe' command is issued (or 'iprobe' using the legacy
		command).  If CONFIG_I2C_MULTI_BUS is set, specify a list of bus-device
		pairs.  Otherwise, specify a 1D array of device addresses

		e.g.
			#undef	CONFIG_I2C_MULTI_BUS
			#define CFG_I2C_NOPROBES	{0x50,0x68}

		will skip addresses 0x50 and 0x68 on a board with one I2C bus

			#define	CONFIG_I2C_MULTI_BUS
			#define CFG_I2C_MULTI_NOPROBES	{{0,0x50},{0,0x68},{1,0x54}}

		will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1

1426 1427 1428 1429 1430
		CFG_SPD_BUS_NUM

		If defined, then this indicates the I2C bus number for DDR SPD.
		If not defined, then U-Boot assumes that SPD is on I2C bus 0.

1431 1432 1433 1434 1435 1436 1437 1438 1439 1440
		CFG_RTC_BUS_NUM

		If defined, then this indicates the I2C bus number for the RTC.
		If not defined, then U-Boot assumes that RTC is on I2C bus 0.

		CFG_DTT_BUS_NUM

		If defined, then this indicates the I2C bus number for the DTT.
		If not defined, then U-Boot assumes that DTT is on I2C bus 0.

1441 1442 1443 1444 1445 1446
		CONFIG_FSL_I2C

		Define this option if you want to use Freescale's I2C driver in
		drivers/fsl_i2c.c.


wdenk's avatar
wdenk committed
1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459
- SPI Support:	CONFIG_SPI

		Enables SPI driver (so far only tested with
		SPI EEPROM, also an instance works with Crystal A/D and
		D/As on the SACSng board)

		CONFIG_SPI_X

		Enables extended (16-bit) SPI EEPROM addressing.
		(symmetrical to CONFIG_I2C_X)

		CONFIG_SOFT_SPI

1460 1461 1462 1463 1464 1465 1466
		Enables a software (bit-bang) SPI driver rather than
		using hardware support. This is a general purpose
		driver that only requires three general I/O port pins
		(two outputs, one input) to function. If this is
		defined, the board configuration must define several
		SPI configuration items (port pins to use, etc). For
		an example, see include/configs/sacsng.h.
wdenk's avatar
wdenk committed
1467

wdenk's avatar
wdenk committed