= Overview =
Detailed instructions to configure This wiki page has more detailed information about muxon IGEPv2. See <br> Read general [[Mux configuration|this 'Mux configuration' page]] for more informationbefore use it.This article contains: <br>
= Feedback and Contributing =*How-to disable some external peripherals to avoid interferences *Some detailed examples.
At any point= Disable Peripherals = Some connectors share multiple peripherals like OMAP, WIFI/BT combo, etc. You should disable unused peripherals to avoid interferences. For example: if you see a mistake want to control WIFI module via J990 disable OMAP or if you can contribute want use [[How to this How-Toset up UART2 in J990|UART2 at j990]] disable Bluetooth. See schematics or [[Connectors Summary|connectors summary]] for more information. === BT/WIFI Combo === Bluetooth and WIFI can be disabled separately with reset pins: RESET_N_W (for WIFI) in pad 47 and RST_N_B (for Bluetooth) in pad 16: *RESET_N_W/RST_N_B=0: Enabled reset *RESET_N_W/RST_N_B=1: Disabled reset
= Disable Peripherals =Use GPIO to control it. See [[Frequently Asked Questions and Their Answers|FAQs]] to know which GPIO needs to be used.
{| cellspacing="1" cellpadding="1" border= BT/WIFI ="1" align="center" width="200"|-| [[Image:WIFI-BT Schematic.png|400x277px]]|}
See [[Frequently Asked Questions and Their Answers#Is_it_possible_to_config_the_wireless_LAN_and_bluetooth_so_they_are_completely_off.2C_and_not_consuming_any_power_at_all.3F|FAQ]] Click to see with pins need to configure. More information about configure [[How to setup Marvell bluetooth|BT]] and [[How to setup Marvell 88w8686 SDIO wifi|WIFI]] enlarge image<br>
==== Bluetooth ====
There are two ways to disable Bluetooth. More information about [[How to setup Marvell bluetooth|Bluetooth]]
===== First way: =====
Logging with root user via SSH or Serial cable.<br>
NOTE: Poky distribution does not have debug filesystem enabled. Mount it:
<pre>mount -t debugfs none /sys/kernel/debug</pre>
Go to /sys/kernel/debug/omap_mux/<br>
'''Compile kernel source code'''
Use this [[Linux Kernel 2.6.35.y|tutorial]] (Kernel) and this [http://labs.igep.es/index.php/The_IGEP_X-loader other] (IGEPxloader) to install Linaro Headless (or Poky) with your custom kernel in SD card. You can compile the IGEPxloader, but is not necessary.<br>
==== WIFI ====
There are two ways to disable WIFI. More information about [[How to setup Marvell 88w8686 SDIO wifi|WIFI]]
===== First way: =====
This mode has a issue, when your system reboot or shutdown you will need to configure again. Using user space to configure mux and disable WIFI. NOTE: If you need bluetooth activate, configure it before disable WIFI. Follow [[How to setup Marvell bluetooth|this tutorial]].
Logging with root user via SSH or Serial cable.<br>
NOTE: Poky distribution does not have debug filesystem enabled. Mount it:
<pre>mount -t debugfs none /sys/kernel/debug</pre>
Go to /sys/kernel/debug/omap_mux/<br>
root@localhost:/sys/class/gpio#
</pre>
===== Second way : =====
Configure kernel sources. Configuration will be permanent. There are many ways to edit source code, this method is focused for igep0020 RC without igep0022 support. <br> Go to [http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=blob_plain;f=arch/arm/mach-omap2/board-igep00x0.c;hb=e620ef8e577d73681f16ab80471332286c1b9fd5 $(kernel path)/arch/arm/mach-omap2/board-igep00x0.c] and search next line: <br>
'''Compile kernel source code'''
Use this [[Linux Kernel 2.6.35.y|tutorial]] (Kernel) and this [http://labs.igep.es/index.php/The_IGEP_X-loader other] (IGEPxloader) to install Linaro Headless (or Poky) with your custom kernel in SD card. You can compile the IGEPxloader, but is not necessary.<br> === TP65950 PCM VSP === This module is used to transfer audio via Bluetooth
{| cellspacing="1" cellpadding="1" border= TP65950 "1" align="center" width="200"|-| [[Image:TPS-PCM -VSP<br> ===.png|800x164px]]|}
==== Click to enlarge image '''Disable BT audio'''<br> ====
Default kernel has disabled TWL4030 PCM voice interface output pins to high impedance, otherwise this module forces the level of mcbsp3_fsx and mcbsp3_clkx pins. To make sure, go to [http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=blob_plain;f=sound/soc/codecs/twl4030.c;hb=linux-2.6.35.y $(kernel path)/sound/soc/codecs/twl4030.c] file already read: <br>
<pre> 0x04, /* REG_VOICE_IF (0xF) */
</pre>
==== '''Enable BT audio'''<br> ====
<pre> 0x00, /* REG_VOICE_IF (0xF) */
</pre>
<br>
= Edit mux == TFP410 === This external peripheral converts DVI signal to HDMI. To use some JA41/JA42 pads for other purpose is necessary disable it. GPIO_170 control TFP410 Power down (PD pad). Power down (active low). In the powerdown state, only the digital I/O buffers and I2C interface remain active. A high level selects the normal operating mode. A low level selects the powerdown mode.<br> It was tested using alternate peripherals like UARTs and GPIOs. Caution, in powerdown mode, pads aren't in safe mode (high impedance). {| cellspacing="1" cellpadding="1" border="1" align="center" width="200"|-| [[Image:Tfp410 IGEPv2.png|713x462px]]|} <br> ===== First way: ===== This mode has a issue, when your system reboot or shutdown you will need to configure again. Using user space to configure mux and powerdown TFP410.
=== UART1 in J990 ===Logging with root user via SSH or Serial cable.<br>
Use ebuddies to configure UART1 in J990, go to igepNOTE: Poky distribution does not have debug filesystem enabled.iniMount it: <pre>mount -t debugfs none /sys/kernel/debug</pre> Go to /sys/kernel/debug/omap_mux/<br>
board.ei485= [yes, no]Set hdq_sio to gpio170 (mode 4): Format: <string<pre>echo 0x104 >hdp_sio</pre> Revise that: <pre>root@localhost:/sys/kernel/debug/omap_mux# cat hdq_sio noname: disable ei485hdq_sio.gpio_170 (0x480021c6/0x196 = 0x0104), use UART1 as RS232b j25, supported by igep0020t NAmode: OMAP_PIN_INPUT | OMAP_MUX_MODE4signals: hdq_sio | sys_altclk | i2c2_sccbe | i2c3_sccbe | gpio_170 | NA | NA | safe_moderoot@localhost:/sys/kernel/debug/omap_mux# </pre> defaultGo to: yes/sys/class/gpio/
More information about RS485 [[Connectors SummaryCheck that gpio170 is in user space: <pre>root@localhost:/sys/class/gpio#J940_connector|here]] and [httplsexport gpio137 gpio138 gpio139 gpio170 gpio64 gpiochip0 gpiochip128 gpiochip160 gpiochip192 gpiochip32 gpiochip64 gpiochip96 unexportroot@localhost:/sys/en.wikipedia.orgclass/wikigpio# </RS-485 here] pre> If you don't have it, you should export gpio170: <br> <pre>echo 170 > /sys/class/gpio/export </pre> Set gpio170 to low value to disable TFP410: <pre>echo 0 > /sys/class/gpio/gpio170/value</pre> Revise that: <pre>root@localhost:/sys/class/gpio# cat /sys/class/gpio/gpio170/value 0root@localhost:/sys/class/gpio# </pre> ===== Second way : =====
You can test new configuration using [[How Configure kernel sources. Configuration will be permanent. There are many ways to use UARTs|edit source code, this tutorial]method is focused for igep0020 RC without igep0022 support. <br> Go to [http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=blob_plain;f=arch/arm/mach-omap2/board-igep0020.c;hb=db3cb47adf10504d3847d54927de50b2fa94c008 $(kernel path)/arch/arm/mach-omap2/board-igep0020.c] and search next line: <br> <pre> static inline void igep0020_display_init(void)static int igep0020_enable_dvi(struct omap_dss_device *dssdev){ gpio_direction_output(GPIO_DVI_PUP, 1);
=== GPIO in J990 === return 0;}</pre> "static int igep0020_enable_dvi" initialize DVI. Edit to disable it: <pre>static int igep0020_enable_dvi(struct omap_dss_device *dssdev){ gpio_direction_output(GPIO_DVI_PUP, 0);
Reset [[Mux instructions#WIFI|WIFI]], [[Mux instructions#Bluetooth|BT]] or [[Mux instructions#TP65950_PCM_VSP|TPS]] if you use some pad shared with this connector, return 0;}</pre> '''Compile kernel source code'''
Configure GPIO, don't use Use this [[Frequently Asked Questions and Their Answers#Is_it_possible_to_config_the_wireless_LAN_and_bluetooth_so_they_are_completely_offLinux Kernel 2.6.2C_and_not_consuming_any_power_at_all35.3Fy|these GPIOtutorial]](Kernel) and this [http://labs.igep.es/index.php/The_IGEP_X-loader other] (IGEPxloader) to install Linaro Headless (or Poky) with your custom kernel in IGEP WIFI/BT versionsSD card. You can compile the IGEPxloader, but is not necessary.<br>
Use [[How to use GPIOs|this manual]] to configure = Edit mux<br> =
More information [[Connectors Summary#J990_connector|here]]Here you can found some detailed examples to configure mux. You can add more.<br>
=== GPIO UART1 in JTAG J960 ===
Not all JTAG pins have GPIOUse ebuddies to configure UART1 in J960, more information [[Connectors_Summary#J400_connector|here]]go to igep.<br> ini:
Use board.ei485= [[How to yes, no] Format: <string> no: disable ei485, use GPIOs|this manual]] to configure muxUART1 as RS232, supported by igep0020 default: yes
=== GPIO in JC30 ===More information about RS485 [[Connectors Summary#J940_connector|here]] and [http://en.wikipedia.org/wiki/RS-485 here]
Not all JC30 pins have GPIO, more information You can test new configuration using [[Connectors Summary#JC30_connectorHow to use UARTs|herethis tutorial]].<br>
Use [[How to use GPIOs|this manual]] to configure mux<br>=== UART3 in J960 ===
Edit igep.ini to disable serial debug, comment next lines: <pre>; Setup the Kernel console params;console=ttyO2,115200n8;console=ttyS2,115200n8; Enable early printk;earlyprintk= GPIO in JA42 ==serial,tty02,115200;earlyprintk=serial,ttyS2,115200 </pre>
Not all JA42 pins have GPIOPoky linux starts an user terminal at UART3, more information [[Connectors Summary#JA42_connector|here]]You must disable it to avoid interferences. Some pads are shared with TFP410<br> Comment next lines in /etc/inittab:
Use [[How to use GPIOs|this manual]] to configure mux<brpre># Normally not reached, but fallthrough in case of emergency.#z6:6:respawn:/sbin/sulogin#S:2345:respawn:/sbin/getty 115200 ttyO2# /sbin/getty invocations for the runlevels.<br/pre>
=== GPIO in JA41 ===You can test new configuration using [[How to use UARTs|this tutorial]]<br>
Please contribute<br> === GPIO in J990 ===
=== GPIO in TP ===Reset [[Mux instructions#WIFI|WIFI]], [[Mux instructions#Bluetooth|BT]] or [[Mux instructions#TP65950_PCM_VSP|TPS]] if you use some pad shared with this connector, more information [[Connectors Summary#J990_connector|here]].
Please contributeConfigure GPIO, don't use [[Frequently Asked Questions and Their Answers#Is_it_possible_to_config_the_wireless_LAN_and_bluetooth_so_they_are_completely_off.2C_and_not_consuming_any_power_at_all.3F|these GPIO]] in IGEP WIFI/BT versions.<br>
Use [[How to use GPIOs|this manual]] to configure mux via user space<br>
'''Under construction''' Edit [http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=blob_plain;f=arch/arm/mach-omap2/board-igep00x0.c;hb=e620ef8e577d73681f16ab80471332286c1b9fd5 $(kernel path)/arch/arm/mach-omap2/board-igep00x0.c] or [http://git.igep.es/?p=pub/scm/linux-omap-2.6.git;a=blob_plain;f=arch/arm/mach-omap2/board-igep0020.c;hb=refs/heads/linux-2.6.35.y $(kernel path)/arch/arm/mach-omap2/board-igep0020.c] to configure GPIO via Kernel source, example [[How to set up UART2 in J990#Third_way|here]].<br>
[[Category:How_to_forge]] [[Category:TutorialsPeripherals]]
