b43: Remove PIO support

Remove b43 PIO support.
DMA works well on all supported devices. There's no reason to use PIO.
Additionally, new devices don't support PIO in hardware anymore.
b43 PIO support is dead and unused code.

After applying this patch please do
git rm drivers/net/wireless/b43/pio.h
git rm drivers/net/wireless/b43/pio.c
to remove the main PIO support code.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 0 insertions, 48 deletions

diff --git a/drivers/net/wireless/b43/Kconfig b/drivers/net/wireless/b43/Kconfig
index fdbc351ac33..8aa5e3458dc 100644
--- a/drivers/net/wireless/b43/Kconfig
+++ b/drivers/net/wireless/b43/Kconfig
@@ -83,51 +83,3 @@ config B43_DEBUG
 
           Say Y, if you want to find out why the driver does not
           work for you.
-
-config B43_DMA
-        bool
-        depends on B43
-config B43_PIO
-        bool
-        depends on B43
-
-choice
-        prompt "Broadcom 43xx data transfer mode"
-        depends on B43
-        default B43_DMA_AND_PIO_MODE
-
-config B43_DMA_AND_PIO_MODE
-        bool "DMA + PIO"
-        select B43_DMA
-        select B43_PIO
-        ---help---
-          Include both, Direct Memory Access (DMA) and Programmed I/O (PIO)
-          data transfer modes.
-          The actually used mode is selectable through the module
-          parameter "pio". If the module parameter is pio=0, DMA is used.
-          Otherwise PIO is used. DMA is default.
-
-          If unsure, choose this option.
-
-config B43_DMA_MODE
-        bool "DMA (Direct Memory Access) only"
-        select B43_DMA
-        ---help---
-          Only include Direct Memory Access (DMA).
-          This reduces the size of the driver module, by omitting the PIO code.
-
-config B43_PIO_MODE
-        bool "PIO (Programmed I/O) only"
-        select B43_PIO
-        ---help---
-          Only include Programmed I/O (PIO).
-          This reduces the size of the driver module, by omitting the DMA code.
-          Please note that PIO transfers are slow (compared to DMA).
-
-          Also note that not all devices of the 43xx series support PIO.
-          The 4306 (Apple Airport Extreme and others) supports PIO, while
-          the 4318 is known to _not_ support PIO.
-
-          Only use PIO, if DMA does not work for you.
-
-endchoice