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Can't scan network with WL1835 WiFi module

Other Parts Discussed in Thread: WL1835MOD, AM4378, WL1835

We made a CPU board based on AM4378(broadly based on am437x-gp-evm) with onboard wireless LAN (WL1835MOD). Now I have the following problem in Wireless LAN.

  1. If I enter “iw wlan0 scan | grep SSID “from the command line, I got the error “command failed: Network is down (-100) “
  2. If I enter “cat /proc/interrupts | grep wl18xx “from the command line, I got the message as follows

 209:   0  481ac000.gpio 21 Level wlxx

I hope that above “0” is not correct. It should be greater than “0”.  How do I achieve this?

3.  I am not able to ping my am4378 board to router. How do I achieve ping and scan SSID ?

Note : I am using Linksys wireless router with password protected.

I have added the following lines in the device tree source file,

&am43xx_pinmux {

     pinctrl-names = "default", "sleep";

     pinctrl-0 = <& wlan_irq_pins_default &ddr3_vtt_toggle_default>;

     pinctrl-1 = <& wlan_irq_pins_sleep >;

 

     ddr3_vtt_toggle_default: ddr_vtt_toggle_default {

           pinctrl-single,pins = <

                0x25C (DS0_PULL_UP_DOWN_EN | PIN_OUTPUT_PULLUP | DS0_FORCE_OFF_MODE | MUX_MODE7) /* spi0_cs0.gpio5_7 */

           >;

     };

 

mmc2_pins_default: mmc2_pins_default {

      pinctrl-single,pins = <

                  0x13c ( PIN_INPUT | MUX_MODE6 ) /* (B16) mii1_rxd1.mmc2_clk */

                  0x114 ( PIN_OUTPUT | MUX_MODE6 ) /* (A13) mii1_tx_en.mmc2_cmd */

                  0x118 ( PIN_INPUT | MUX_MODE5 ) /* (A15) mii1_rx_dv.mmc2_dat0 */

                         0x11c ( PIN_INPUT | MUX_MODE5 ) /* (C16) mii1_txd3.mmc2_dat1 *

                         0x120 ( PIN_INPUT | MUX_MODE5 ) /* (C13) mii1_txd2.mmc2_dat2 */

                         0x108 ( PIN_INPUT | MUX_MODE5 ) /* (D16) mii1_col.mmc2_dat3 */

      >;

};

/* Optional sleep pin settings. Must manually enter values in the below skeleton. */

mmc2_pins_sleep: mmc2_pins_sleep {

      pinctrl-single,pins = <

                  0x13c ( ) /* (B16) mii1_rxd1.mmc2_clk */

                  0x114 ( ) /* (A13) mii1_tx_en.mmc2_cmd */

                  0x118 ( ) /* (A15) mii1_rx_dv.mmc2_dat0 */

                  0x11c ( ) /* (C16) mii1_txd3.mmc2_dat1 */

                  0x120 ( ) /* (C13) mii1_txd2.mmc2_dat2 */

                  0x108 ( ) /* (D16) mii1_col.mmc2_dat3 */

>;

};

wlan_irq_pins_default: wlan_irq_pins_default {

            pinctrl-single,pins = <

                        0x140 ( PIN_INPUT | MUX_MODE2 ) /* (F17) mii1_rxd0.rgmii1_rd0 */

                        0x1a0 ( PIN_OUTPUT_PULLUP | MUX_MODE9 ) /* (L23) mcasp0_aclkr.gpio0[18] =>this line is connected to wireless & Bluetooth (wl1835) enable signal(pin no: 40&41 */

            >;

};

 

/* Optional sleep pin settings. Must manually enter values in the below skeleton. */

wlan_irq_pins_sleep: wlan_irq_pins_sleep {

            pinctrl-single,pins = <

                        0x140 ( ) /* (F17) mii1_rxd0.rgmii1_rd0 */

                        0x1a0 ( PIN_OUTPUT_PULLUP | MUX_MODE9 ) /* (L23) mcasp0_aclkr.gpio0[18] */

 

            >;

};

 

Please clarify the below line,

     0x1a0 ( PIN_OUTPUT_PULLUP | MUX_MODE9 ) /* (L23) mcasp0_aclkr.gpio0[18] =>this line is connected to wireless & Bluetooth (wl1835) enable signal of wl1835mod(pin no: 40&41) */

Does the above declaration is correct?

Note: If I use “PIN_OUTPUT_PULLDOWN” instead of “PIN_OUTPUT_PULLUP”, wireless module is not enabled.

 

The following things also I have done to make wireless module work.

  • I  built WL18xx module and copied the required file to file system. I referred below link to built WL18xx script.

http://processors.wiki.ti.com/index.php/WL18xx_System_Build_Scripts

  • I initialized the wireless module using “configure-device.sh” after boots”

Note : I got a message also in the kernel boot log as “mmc2: new high speed SDIO crad at address 0001” . wl1835mod is connected as “mmc2”

 

Thanking you.

 Regards,

Winiston.P