[PATCH] bcm43xx: Partially fix PIO code. Add Kconfig option for PIO or DMA mode (or both).

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

1 files changed, 57 insertions, 0 deletions

diff --git a/drivers/net/wireless/bcm43xx/Kconfig b/drivers/net/wireless/bcm43xx/Kconfig
new file mode 100644
index 000000000000..d8d23155ee3c
--- /dev/null
+++ b/drivers/net/wireless/bcm43xx/Kconfig
@@ -0,0 +1,57 @@
+config BCM43XX
+        tristate "Broadcom BCM43xx wireless support"
+        depends on PCI && IEEE80211 && IEEE80211_SOFTMAC && NET_RADIO && EXPERIMENTAL
+        select FW_LOADER
+        ---help---
+          This is an experimental driver for the Broadcom 43xx wireless chip,
+          found in the Apple Airport Extreme and various other devices.
+
+config BCM43XX_DEBUG
+        bool "Broadcom BCM43xx debugging (RECOMMENDED)"
+        depends on BCM43XX
+        default y
+        ---help---
+          Broadcom 43xx debugging messages.
+          Say Y, because the driver is still very experimental and
+          this will help you get it running.
+
+config BCM43XX_DMA
+        bool
+config BCM43XX_PIO
+        bool
+
+choice
+        prompt "BCM43xx data transfer mode"
+        depends on BCM43XX
+        default BCM43XX_DMA_AND_PIO
+
+config BCM43XX_DMA_AND_PIO_MODE
+        bool "DMA + PIO"
+        select BCM43XX_DMA
+        select BCM43XX_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 BCM43XX_DMA_MODE
+        bool "DMA (Direct Memory Access) only"
+        select BCM43XX_DMA
+        ---help---
+          Only include Direct Memory Access (DMA).
+          This reduces the size of the driver module, by omitting the PIO code.
+
+config BCM43XX_PIO_MODE
+        bool "PIO (Programmed I/O) only"
+        select BCM43XX_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).
+          Only use PIO, if DMA does not work for you.
+
+endchoice