Replicant

h1. I9250Bootloader

{{toc}}

h2. Accessing the bootloader console

When connected on the serial port, during boot, if you press the volume down button and press enter on the serial console, you can get a shell:

<pre>

====== VCELL : 409625, SOC : 100, nType : 4 ======

[Charger] nScaledVCELL : 409625000, nDesriedSOC, : 98, nMaxSOC : 118, nMinSOC : 78

* FB base addr = 0xbea70000!

* PANEL_S6E8AA0_ID_READ : 0x12, 0x8e, 0x9b.

[ omap_power_get_reset_source :47]	 PRM_RSTST : 0x2

Autoboot (1 seconds) in progress, press any key to stop .

Autoboot aborted..

SBL> 

SBL> 

SBL> 

SBL> help

Following commands are supported:

* setenv

* saveenv

* printenv

* help

* reset

* boot

* kernel

* loadpart

* loadkernel

* erasepart

* omap_upload_rdx

* omap_test_button

* omap_test_hwinfo

* omap_set_gpio_level

* omap_get_gpio_level

* omap_test_twl6030

* omap_test_power

* omap_reboot

* omap_halt

* omap_cmdline_power

* omap_test_kbd

* omap_test_usbacc

* usb

* omap_test_max17043

* omap_test_fsa9480

* omap_dump_sec_log_buf

* omap_test_sud

To get commands help, Type "help <command>"

SBL> 

</pre>

h2. Available commands

Here's the known list of commands:

<pre>

SBL> help

Following commands are supported:

* setenv

* saveenv

* printenv

* help

* reset

* boot

* kernel

* loadpart

* loadkernel

* erasepart

* omap_upload_rdx

* omap_test_button

* omap_test_hwinfo

* omap_set_gpio_level

* omap_get_gpio_level

* omap_test_twl6030

* omap_test_power

* omap_reboot

* omap_halt

* omap_cmdline_power

* omap_test_kbd

* omap_test_usbacc

* usb

* omap_test_max17043

* omap_test_fsa9480

* omap_dump_sec_log_buf

* omap_test_sud

To get commands help, Type "help <command>"

SBL> 

</pre>

And their respective help:

<pre>

SBL> help setenv

* Help : setenv

* Usage : setenv [name] [value] . .

	Modify current environment info on ram

SBL> help saveenv

* Help : saveenv

* Usage : saveenv

	Save cuurent environment info to flash

SBL> help printenv

* Help : printenv

* Usage : printenv

	Print current environment info on ram

SBL> help help

* Help : help

* Usage : help [command]

SBL> help reset

* Help : reset

* Usage : reboot

Reboot system

SBL> help boot

* Help : boot

* Usage : boot [kernel options]

Boot Linux with optional kernel options

SBL> help kernel

* Help : kernel

* Usage : kernel hex_adr

Change the Linux kernel base

SBL> help loadpart

* Help : loadpart

* Usage : load partition from storage device.

SBL> help loadkernel

* Help : loadkernel

* Usage : load kernel from storage device.

SBL> help erasepart

* Help : erasepart

* Usage : erase partition.

SBL> help omap_upload_rdx

* Help : omap_upload_rdx

* Usage : [OMAP] upload RDX

	omap_upload_rdx

SBL> help omap_test_button

* Help : omap_test_button

* Usage : [OMAP] test OMAP buttons

	omap_test_button

SBL> help omap_test_hwinfo

* Help : omap_test_hwinfo

* Usage : [OMAP] test OMAP HW Information

	omap_test_hwinfo

SBL> help omap_set_gpio_level

* Help : omap_set_gpio_level

* Usage : [OMAP] set GPIO level

	omap_set_gpio_level {GPIO} {VALUE}

SBL> help omap_get_gpio_level

* Help : omap_get_gpio_level

* Usage : [OMAP] get GPIO level

	omap_get_gpio_level {GPIO}

SBL> help omap_test_twl6030

* Help : omap_test_twl6030

* Usage : [OMAP] test twl6030 device

	omap_test_twl6030

SBL> help omap_test_power

* Help : omap_test_power

* Usage : [OMAP] test power function

	omap_test_power

SBL> help omap_reboot

* Help : omap_reboot

* Usage : [OMAP] system reboot command

	omap_reboot

SBL> help omap_halt

* Help : omap_halt

* Usage : [OMAP] system halt command

	omap_halt

SBL> help omap_cmdline_power

* Help : omap_cmdline_power

* Usage : [OMAP] check kernel-cmdline by power

	omap_cmdline_power

SBL> help omap_test_kbd

* Help : omap_test_kbd

* Usage : [OMAP] test power function

	omap_test_kbd

SBL> help omap_test_usbacc

* Help : omap_test_usbacc

* Usage : [OMAP] test OMAP usb-accessary

	omap_test_usbacc

SBL> help usb

* Help : usb

* Usage : usb download command

SBL> help omap_test_max17043

* Help : omap_test_max17043

* Usage : [OMAP] test max17043 device

	omap_test_max17043

SBL> help omap_test_fsa9480

* Help : omap_test_fsa9480

* Usage : [OMAP] test fsa9480 device

	omap_test_fsa9480

SBL> help omap_dump_sec_log_buf

* Help : omap_dump_sec_log_buf

* Usage : [OMAP] dump sec-log-buf

	omap_dump_sec_log_buf

SBL> help omap_test_sud

* Help : omap_test_sud

* Usage : [OMAP] test SUD image

	omap_test_sud {NUMBER}

SBL> 

</pre>

h2. Changing the kernel commandline arguments

I've tried to modify the CMDLINE:

<pre>

SBL> setenv CMDLINE loglevel=8 console=ttyFIQ0 androidboot.console=ttyFIQ0

argv[0] : setenv

argv[1] : CMDLINE

argv[2] : loglevel=8 console=ttyFIQ0 androidboot.console=ttyFIQ0

value : 656175548

SBL> saveenv

save_param start block=49152, no.blocks=16384

</pre>

But once booted, "loglevel=8" wasn't found in /proc/cmdline on Replicant 6.0 0003 so it doesn't seem to have an impact. Though, on this bootloader, the commandline can also be modified by modifying the boot.img commandline parameters.

h2. Other commands

<pre>

SBL> omap_test_hwinfo

-----------------------------------------------------------

   OMAP-Samsung HW Information

   Board  Name : tuna  REV 9

   Board  Rev  : HSPA - 9

   Boot   Type : USB MMC1

   Device Type : HS

   Build Date  : Jan 24 2012 18:27:20

-----------------------------------------------------------

</pre>

<pre>

SBL> printenv

PARAM Rev 1.6

SERIAL_SPEED : 7

LOAD_RAMDISK : 0

BOOT_DELAY : 1

LCD_LEVEL : 6

SWITCH_SEL : 3

PHONE_DEBUG_ON : 0

LCD_DIM_LEVEL : 0

LCD_DIM_TIME : 6

MELODY_MODE : 1

REBOOT_MODE : 0

NATION_SEL : 0

LANGUAGE_SEL : 0

SET_DEFAULT_PARAM : 0

OFF_MODE_CHARGE : 1

FLASH_LOCK_STATUS : 0

VERSION : 

CMDLINE : 

DELTA_LOCATION : /mnt/rsv

WIFI_MAC_LINE : 

PARAM_STR_4 : DCM

</pre>