Recent work on the device firmware discovered a completely new hardware mode for b43 devices. All b43 devices have a bit in the MAC-control register to enable true hardware-fullMAC support. In fullmac mode the MAC and PHY is completely serviced by the firmware, so no driver support is required anymore.
Full hardware MAC support has advantages and disadvantages: PRO: - The b43 driver does support _all_ devices (also 802.11n) in STA and AP mode. - The driver code is a lot simpler for the fullmac case. (It skips all of the software MAC and PHY init). - People finally stop poking me to implement the N-PHY and LP-PHY code, yay. CON: - Packet injection is not supported in fullmac mode, yet. It's on the TODO list with deadline 1.4.2010. The feature currently is disabled by default, because it isn't tested enough. It can be enabled at modprobe time with the "fullmac=1" module parameter. Signed-off-by: Michael Buesch <[email protected]> --- John, please queue this patch for 3.6.31. Index: wireless-testing/drivers/net/wireless/b43/b43.h =================================================================== --- wireless-testing.orig/drivers/net/wireless/b43/b43.h 2009-04-01 00:00:18.000000000 +0200 +++ wireless-testing/drivers/net/wireless/b43/b43.h 2009-04-01 00:00:20.000000000 +0200 @@ -347,6 +347,7 @@ enum { #define B43_MACCTL_ENABLED 0x00000001 /* MAC Enabled */ #define B43_MACCTL_PSM_RUN 0x00000002 /* Run Microcode */ #define B43_MACCTL_PSM_JMP0 0x00000004 /* Microcode jump to 0 */ +#define B43_MACCTL_FULLMAC 0x00000008 /* Enable hardware full-MAC support */ #define B43_MACCTL_SHM_ENABLED 0x00000100 /* SHM Enabled */ #define B43_MACCTL_SHM_UPPER 0x00000200 /* SHM Upper */ #define B43_MACCTL_IHR_ENABLED 0x00000400 /* IHR Region Enabled */ Index: wireless-testing/drivers/net/wireless/b43/main.c =================================================================== --- wireless-testing.orig/drivers/net/wireless/b43/main.c 2009-04-01 00:00:18.000000000 +0200 +++ wireless-testing/drivers/net/wireless/b43/main.c 2009-04-01 00:00:20.000000000 +0200 @@ -63,6 +63,10 @@ MODULE_LICENSE("GPL"); MODULE_FIRMWARE(B43_SUPPORTED_FIRMWARE_ID); +static int modparam_fullmac; +module_param_named(fullmac, modparam_fullmac, int, 0444); +MODULE_PARM_DESC(fullmac, "Switch the hardware into fullmac mode"); + static int modparam_bad_frames_preempt; module_param_named(bad_frames_preempt, modparam_bad_frames_preempt, int, 0444); MODULE_PARM_DESC(bad_frames_preempt, @@ -4113,6 +4117,9 @@ static void b43_wireless_core_exit(struc return; b43_set_status(dev, B43_STAT_UNINIT); + if (modparam_fullmac) + goto ssb_disable; + /* Stop the microcode PSM. */ macctl = b43_read32(dev, B43_MMIO_MACCTL); macctl &= ~B43_MACCTL_PSM_RUN; @@ -4132,6 +4139,7 @@ static void b43_wireless_core_exit(struc dev->wl->current_beacon = NULL; } +ssb_disable: ssb_device_disable(dev->dev, 0); ssb_bus_may_powerdown(dev->dev->bus); } @@ -4157,6 +4165,14 @@ static int b43_wireless_core_init(struct b43_wireless_core_reset(dev, tmp); } + if (modparam_fullmac) { + b43_write32(dev, B43_MMIO_MACCTL, + b43_read32(dev, B43_MMIO_MACCTL) + | B43_MACCTL_FULLMAC); + err = 0; + goto out; + } + /* Reset all data structures. */ setup_struct_wldev_for_init(dev); phy->ops->prepare_structs(dev); -- Greetings, Michael. _______________________________________________ Bcm43xx-dev mailing list [email protected] https://lists.berlios.de/mailman/listinfo/bcm43xx-dev
