= 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= Disable Peripherals 0: Enabled reset *RESET_N_W/RST_N_B=1: Disabled reset 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 ===
=== TP65950 PCM VSP<br> ===This module is used to transfer audio via Bluetooth
{| cellspacing="1" cellpadding="1" border="1" align= "center" width="200"|-| [[Image:TPS-PCM-VSP.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> === 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>
= Edit mux ==== First way: =====
=== UART1 in J990 ===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.
Use ebuddies to configure UART1 in J990, go to igepLogging with root user via SSH or Serial cable.ini: <br>
boardNOTE: Poky distribution does not have debug filesystem enabled.ei485= [yes, no] FormatMount it: <string> no: disable ei485, use UART1 as RS232, supported by igep0020<pre>mount -t debugfs none /sys/kernel/debug</pre> default: yesGo to /sys/kernel/debug/omap_mux/<br>
More information about RS485 [[Connectors SummarySet hdq_sio to gpio170 (mode 4): <pre>echo 0x104 > hdp_sio</pre> Revise that: <pre>root@localhost:/sys/kernel/debug/omap_mux#J940_connectorcat hdq_sio name: hdq_sio.gpio_170 (0x480021c6/0x196 = 0x0104), b j25, t NAmode: OMAP_PIN_INPUT |here]] and [httpOMAP_MUX_MODE4signals:hdq_sio | sys_altclk | i2c2_sccbe | i2c3_sccbe | gpio_170 | NA | NA | safe_moderoot@localhost:/sys/kernel/debug/omap_mux# </pre> Go to: /en.wikipedia.orgsys/class/wikigpio/RS-485 here]
You can test new configuration using [[How Check that gpio170 is in user space: <pre>root@localhost:/sys/class/gpio# lsexport gpio137 gpio138 gpio139 gpio170 gpio64 gpiochip0 gpiochip128 gpiochip160 gpiochip192 gpiochip32 gpiochip64 gpiochip96 unexportroot@localhost:/sys/class/gpio# </pre> If you don't have it, you should export gpio170: <br> <pre>echo 170 > /sys/class/gpio/export </pre> Set gpio170 to use UARTs|this tutorial]] 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 : =====
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= GPIO in J990 ==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);
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> "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);
Configure 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 return 0;}</BT versions.<brpre> '''Compile kernel source code'''
Use this [[How to use GPIOsLinux Kernel 2.6.35.y|tutorial]] (Kernel) and this manual][http://labs.igep.es/index.php/The_IGEP_X-loader other] (IGEPxloader) to configure muxinstall Linaro Headless (or Poky) with your custom kernel in SD card. You can compile the IGEPxloader, but is not necessary.<br>
More information [[Connectors Summary#J990_connector|here]].<br> = Edit mux =
=== GPIO in JTAG ===Here you can found some detailed examples to configure mux. You can add more.
Not all JTAG pins have GPIO, more information [[Connectors_Summary#J400_connector|here]].<br> === UART1 in J960 ===
Use [[How ebuddies to use GPIOs|this manual]] configure UART1 in J960, go to configure muxigep.ini:
board.ei485=== GPIO in JC30 ===[yes, no] Format: <string> no: disable ei485, use UART1 as RS232, supported by igep0020 default: yes
Not all JC30 pins have GPIO, more More information about RS485 [[Connectors Summary#JC30_connectorJ940_connector|here]]and [http://en.wikipedia.<br> org/wiki/RS-485 here]
Use You can test new configuration using [[How to use GPIOsUARTs|this manualtutorial]] to configure mux<br>
=== GPIO UART3 in JA42 J960 ===
Not all JA42 pins have GPIOEdit igep.ini to disable serial debug, more information [[Connectors Summary#JA42_connector|here]]. Some pads are shared with TFP410comment next lines: <pre>; Setup the Kernel console params;console=ttyO2,115200n8;console=ttyS2,115200n8; Enable early printk;earlyprintk=serial,tty02,115200;earlyprintk=serial,ttyS2,115200 <br/pre>
Use [[How Poky linux starts an user terminal at UART3, You must disable it to use GPIOs|this manual]] to configure mux<br>avoid interferences. Comment next lines in /etc/inittab:
=== GPIO <pre># Normally not reached, but fallthrough in JA41 ===case of emergency.#z6:6:respawn:/sbin/sulogin#S:2345:respawn:/sbin/getty 115200 ttyO2# /sbin/getty invocations for the runlevels.</pre>
Not all JA41 pins have GPIO, more information You can test new configuration using [[Connectors Summary#JA41_connectorHow to use UARTs|herethis tutorial]]. Some pads are shared with TFP410 and TXS0102DCUR <br>
Use [[How to use GPIOs|this manual]] to configure mux<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]].
Some GPIOs avaliable Configure 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 TP: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]]
