> On 9 Sep 2014, at 22:24, Larry Finger <[email protected]> wrote: > >> On 09/09/2014 03:00 PM, Bastien Nocera wrote: >>> On Tue, 2014-09-09 at 14:27 -0500, Larry Finger wrote: >>>> On 09/09/2014 04:56 AM, Bastien Nocera wrote: >>>> Hey, >>>> >>>> I have a tablet that seems to be using Realtek chips to do wireless >>>> communications (hopefully, this time I won't be wrong[1]). >>>> >>>> The device, under the gpio class in /sys, shows with a modalias of >>>> "acpi:OBDA8723:" (that's on "O", not "0"). This seems to correspond to a >>>> Realtek chipset (Larry tells me it matches the PCI ID of 0bda:8723 for >>>> the RTL8723AE chipset). >>>> >>>> It shows up under: >>>> /sys/devices/platform/80860F0A:00/subsystem/devices >>>> >>>> Does anyone have details on how this chipset is actually hooked up? Can >>>> a portion of the existing RTL8723AE driver code be reused? >>> >>> Bastien, >>> >>> From the previous response, it seems unlikely that GPIO is used to control >>> the >>> device. That is what I expected. Working at that primitive level would be >>> extremely difficult timing. >> >> Right. >> >>> I assume that you have checked both 'lspci' and 'lsusb' for any mention of >>> the >>> wireless device. >> >> No mentions at all in there. >> >>> I am not aware of a similar utility to scan an SDIO bus, but >>> perhaps someone on this list will know. >> >> They would show up under /sys/bus/sdio/devices/ and there's nothing in >> there except the SD card reader. >> >>> In addition, a full listing of 'lspci >>> -nnv' will give a clue regarding what adapters are on the device. >> >> Here it is, I doubt that's much help. >> >> 00:00.0 Host bridge [0600]: Intel Corporation Atom Processor Z36xxx/Z37xxx >> Series SoC Transaction Register [8086:0f00] (rev 0d) >> Subsystem: Intel Corporation Device [8086:0f31] >> Flags: bus master, fast devsel, latency 0 >> Kernel driver in use: iosf_mbi_pci >> Kernel modules: iosf_mbi >> >> 00:02.0 VGA compatible controller [0300]: Intel Corporation Atom Processor >> Z36xxx/Z37xxx Series Graphics & Display [8086:0f31] (rev 0d) (prog-if 00 >> [VGA controller]) >> Subsystem: Intel Corporation Atom Processor Z36xxx/Z37xxx Series >> Graphics & Display [8086:0f31] >> Flags: bus master, fast devsel, latency 0, IRQ 106 >> Memory at a0000000 (32-bit, non-prefetchable) [size=4M] >> Memory at 80000000 (32-bit, prefetchable) [size=512M] >> I/O ports at 1000 [size=8] >> Expansion ROM at <unassigned> [disabled] >> Capabilities: <access denied> >> Kernel driver in use: i915 >> Kernel modules: i915 >> >> 00:14.0 USB controller [0c03]: Intel Corporation Atom Processor >> Z36xxx/Z37xxx Series USB xHCI [8086:0f35] (rev 0d) (prog-if 30 [XHCI]) >> Subsystem: Intel Corporation Atom Processor Z36xxx/Z37xxx Series USB >> xHCI [8086:0f35] >> Flags: bus master, medium devsel, latency 0, IRQ 104 >> Memory at a0800000 (64-bit, non-prefetchable) [size=64K] >> Capabilities: <access denied> >> Kernel driver in use: xhci_hcd >> >> 00:1a.0 Encryption controller [1080]: Intel Corporation Atom Processor >> Z36xxx/Z37xxx Series Trusted Execution Engine [8086:0f18] (rev 0d) >> Subsystem: Intel Corporation Atom Processor Z36xxx/Z37xxx Series >> Trusted Execution Engine [8086:0f18] >> Flags: bus master, fast devsel, latency 0, IRQ 107 >> Memory at a0700000 (32-bit, non-prefetchable) [size=1M] >> Memory at a0600000 (32-bit, non-prefetchable) [size=1M] >> Capabilities: <access denied> >> Kernel driver in use: mei_txe >> Kernel modules: mei_txe >> >> 00:1f.0 ISA bridge [0601]: Intel Corporation Atom Processor Z36xxx/Z37xxx >> Series Power Control Unit [8086:0f1c] (rev 0d) >> Subsystem: Intel Corporation Atom Processor Z36xxx/Z37xxx Series >> Power Control Unit [8086:0f1c] >> Flags: bus master, medium devsel, latency 0 >> Capabilities: <access denied> >> Kernel driver in use: pmc_atom >> Kernel modules: lpc_ich >> >> >>> If the device were used with SDIO, then it would be known as the RTL8723AS. >>> I >>> could not find that chip, but there is an RTL8723BS with a 32-bit driver for >>> Windows 8.1. >> >> That sounds like it could be that one then. This is the only info I >> have, the (very generic) driver set for Windows (which seems to have >> support for every variant) and the DSDT: >> https://bugzilla.kernel.org/attachment.cgi?id=149331 >> >> The Bluetooth device has a firmware named "rtl8723b_config.bin" >> >>> What specific Baytrail tablet do you have? >> >> The Onda v975w. It came with Windows 8.1 32-bit. >> >> I guess that the device is probably a PCI one, but the enumeration is >> done through ACPI instead of "normal" PCI. > > In > http://www.onda-tablet.com/onda-v975w-quad-core-win-8-tablet-9-7-inch-retina-screen-ram-2gb-wifi-32gb.html, > someone is specifically looking for an RTL8723BS driver.
That's helpful. > I will see if my contact at Realtek knows who has worked on drivers for this > device, and if it would be possible to use rtl8723be if we were to supply an > SDIO frontend. I'm not sure why the device doesn't show up in the sysfs tree, but maybe it needs a driver bound to it to show up. > If I were to find code, do you have the possibility to build drivers for the > device? Certainly. I've already made attempts at getting a working touchscreen driver and I have a patch for the accelerometer. Thanks for the detective work :) Cheers-- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
