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 [EMAIL PROTECTED]
Index: wireless-2.6/drivers/net/wireless/b43/Kconfig
===
--- wireless-2.6.orig/drivers/net/wireless/b43/Kconfig 2007-12-26
14:31:03.0 +0100
+++ wireless-2.6/drivers/net/wireless/b43/Kconfig 2007-12-26
14:32:49.0 +0100
@@ -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
Index: wireless-2.6/drivers/net/wireless/b43/Makefile
===
--- wireless-2.6.orig/drivers/net/wireless/b43/Makefile 2007-12-26
14:31:03.0 +0100
+++ wireless-2.6/drivers/net/wireless/b43/Makefile 2007-12-26
14:33:36.0 +0100
@@ -1,4 +1,3 @@
-# b43 core
b43-y += main.o
b43-y += tables.o
b43-y += phy.o
@@ -6,16 +5,10 @@ b43-y += sysfs.o
b43-y += xmit.o
b43-y += lo.o
b43-y += wa.o
-# b43 RFKILL button support
+b43-y += dma.o
b43-$(CONFIG_B43_RFKILL) += rfkill.o
-# b43 LED support
b43-$(CONFIG_B43_LEDS) += leds.o
-# b43 PCMCIA support
b43-$(CONFIG_B43_PCMCIA) += pcmcia.o
-# b43 debugging
b43-$(CONFIG_B43_DEBUG)+= debugfs.o
-# b43 DMA and PIO
-b43-$(CONFIG_B43_DMA) += dma.o
-b43-$(CONFIG_B43_PIO) += pio.o
obj-$(CONFIG_B43) += b43.o
Index: wireless-2.6/drivers/net/wireless/b43/b43.h
===
--- wireless-2.6.orig/drivers/net/wireless/b43/b43.h2007-12-26
14:31:03.0 +0100
+++ wireless-2.6/drivers/net/wireless/b43/b43.h 2007-12-26 14:32:49.0
+0100
@@ -68,11 +68,6 @@
#define B43_MMIO_DMA64_BASE3 0x2C0
#define B43_MMIO_DMA64_BASE4 0x300
#define B43_MMIO_DMA64_BASE5 0x340
-/* PIO */
-#define B43_MMIO_PIO1_BASE 0x300
-#define B43_MMIO_PIO2_BASE 0x310
-#define B43_MMIO_PIO3_BASE 0x320
-#define B43_MMIO_PIO4_BASE 0x330
#define B43_MMIO_PHY_VER 0x3E0
#define B43_MMIO_PHY_RADIO 0x3E2
@@ -577,14 +572,6 @@ struct b43_dma {
struct b43_dmaring *rx_ring3; /* only available on core.rev 5 */
};
-/* Data structures for PIO transmission, per 80211 core. */
-struct b43_pio {
- struct b43_pioqueue *queue0;
- struct b43_pioqueue *queue1;
- struct b43_pioqueue *queue2;
- struct b43_pioqueue *queue3;
-};
-
/* Context information for a noise calculation (Link Quality). */
struct b43_noise_calculation {
u8 channel_at_start;
@@ -700,7 +687,6 @@ struct b43_wldev {
/* Saved init status for handling suspend. */
int suspend_init_status;
- bool __using_pio; /* Internal, use b43_using_pio(). */
bool bad_frames_preempt;/* Use Bad Frames Preemption (default
off) */
bool reg124_set_0x4;/* Some variable to keep track of IRQ
