[Samsung Gear 2] biktor_gj:
I know I said before that I didn't think wifi would be wired internally, but I've been checking it anyway (you never know!)

The board has support for it, the wifi controller is there, so I thought I would at least give it a try. Definitely, it doesn't look like it's wired. I enabled the second MMC slot, reconfigured the kernel and recoded the WLAN support kernel driver for the Gear2. It doesn't work, and here's the result of 2 days of trying:

MMC0 is the flash storage

MMC1 should be the Broadcom 4334

<6>[ 1.561881] [1] 1 Synopsys Designware Multimedia Card Interface Driver
<6>[ 1.562088] [1] 1 dw_mmc dw_mmc.0: Using internal DMA controller.
<6>[ 1.562154] [1] 1 dw_mmc dw_mmc.0: FIFOTH: 0x 300f0070
<6>[ 1.564064] [1] 1 dw_mmc dw_mmc.0: Version ID is 260a
<6>[ 1.564112] [1] 1 dw_mmc dw_mmc.0: DW MMC controller at irq 174, 64 bit host data width, 128 deep fifo
<6>[ 1.564267] [1] 1 dw_mmc dw_mmc.1: Using internal DMA controller.
<6>[ 1.564321] [1] 1 dw_mmc dw_mmc.1: FIFOTH: 0x 200700f8SCSC: Config GPIO: width=4
<6>[ 1.566103] [1] 1 dw_mmc dw_mmc.1: Version ID is 260a
<4>[ 1.566145] [1] 1 MMC hostcontroller for WIFI : mmc1
<4>[ 1.566183] [1] 1 SCSC: registered CD callback
<6>[ 1.566224] [1] 1 dw_mmc dw_mmc.1: DW MMC controller at irq 175, 32 bit host data width, 256 deep fifo

<6>[ 3.813657] [0] 5 sec-battery sec-battery: sec_bat_monitor_work: Call sec_bat_set_polling
<4>[ 3.813860] [0] 1 wifi_set_power = 1
<6>[ 3.813895] [0] 1 ------------------------------------------------
<6>[ 3.813949] [0] 1 ------------------------------------------------
<6>[ 3.814004] [0] 1 brcm_wlan_power Enter: power on
<4>[ 3.814047] [0] 1 BRCMWIFI: Control lock
<4>[ 3.814085] [0] 1 BRCMWIFI: Set mmc ctrl power
<4>[ 3.841611] [0] 1 BRCMWIFI: GPIO WLAN DISABLE
<4>[ 3.995921] [0] 1 BRCMWIFI: GPIO WLAN ENABLE
<4>[ 3.996100] [0] 1 SCSC: Power : GPIO = 1
<4>[ 3.996235] [0] 1 BRCMWIFI: Set power State
<4>[ 3.996373] [0] 1 BRCMWIFI: It was ON, turning off
<6>[ 4.051003] [0] 1 gpio_table = [6]
<4>[ 4.051186] [0] 1 BRCMWIFI: CTRL unlock
<4>[ 4.255952] [0] 1 wifi_set_carddetect = 1
<4>[ 4.256104] [0] 1 SCSC: Card Detected...

<4>[ 4.509675] [0] 14 mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
<4>[ 4.511318] [0] 14 mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
<6>[ 4.571524] [0] 14 mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 100000000Hz, actual 100000000HZ div = 0)
<6>[ 4.572326] [0] 14 dw_mmc dw_mmc.1: Tuning map: 0x 000000f7 mid: 1
<6>[ 4.577125] [0] 14 mmc1: new ultra high speed SDR50 SDIO card at address 0001
<6>[ 4.582016] [1] 750 exynos_cpufreq_tmu_notifier *on=0 volt_offset=0
<6>[ 4.583316] [1] 750 exynos3250_devfreq_mif_tmu_notifier *on=0 volt_offset=0
<6>[ 4.584381] [1] 750 exynos3250_devfreq_int_tmu_notifier *on=0 volt_offset=0
<6>[ 4.584445] [1] 750 tmu temperature state 1 to 0
<4>[ 4.596853] [0] 1 alloc static buf at dfa00000!
<4>[ 4.598014] [0] 1 dhdsdio_probe : no mutex held. set lock
<4>[ 4.599750] [0] 1 bcmsdh_sdmmc: Failed to Read word, Err: 0xffffff92dhdsdio_probe_attach: si_attach failed!
<4>[ 4.599918] [0] 1 dhdsdio_probe: dhdsdio_probe_attach failed
<4>[ 4.600124] [0] 1 sdioh_disable_func_intr: error for read SDIO_CCCR_IENx : 0xffffff92
<4>[ 4.600260] [0] 1 dhdsdio_probe : the lock is released.
<4>[ 4.601636] [0] 1
<4>[ 4.601689] [0] 1 Dongle Host Driver, version 1.88.51 (r)
<4>[ 4.601770] [0] 1 Compiled in drivers/net/wireless/bcmdhd4339 on Aug 27 2015 at 13:09:47
<4>[ 4.601904] [0] 1 dhd_module_init: sdio_register_driver timeout or error
<4>[ 4.602914] [0] 1 ## wifi_remove
<4>[ 4.602995] [0] 1 wifi_set_power = 0
<6>[ 4.603067] [0] 1 ------------------------------------------------
<6>[ 4.603168] [0] 1 ------------------------------------------------
<6>[ 4.603273] [0] 1 brcm_wlan_power Enter: power off
<4>[ 4.603357] [0] 1 BRCMWIFI: Control lock
<4>[ 4.603431] [0] 1 BRCMWIFI: Set mmc ctrl power
<4>[ 4.605564] [0] 1 BRCMWIFI: GPIO WLAN ENABLE
<4>[ 4.605655] [0] 1 SCSC: Power : GPIO = 0
<4>[ 4.605736] [0] 1 BRCMWIFI: Set power State
<4>[ 4.605813] [0] 1 BRCMWIFI: It was off, turning on
<6>[ 4.605902] [0] 1 gpio_table = [6]
<4>[ 4.606001] [0] 1 BRCMWIFI: CTRL unlock

In essence, all the hardware is there, but, unfortunately, it doesn't respond....