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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 04:34:11 +08:00
linux-next/drivers/staging/brcm80211
Linus Torvalds df9b29d13e Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
* 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6: (28 commits)
  staging: usbip: bugfix for isochronous packets and optimization
  staging: usbip: bugfix add number of packets for isochronous frames
  staging: usbip: bugfixes related to kthread conversion
  staging: usbip: fix shutdown problems.
  staging: hv: Fix GARP not sent after Quick Migration
  staging: IIO: IMU: ADIS16400: Avoid using printk facility directly
  staging: IIO: IMU: ADIS16400: Fix product ID check, skip embedded revision number
  staging: IIO: IMU: ADIS16400: Make sure only enabled scan_elements are pushed into the ring
  staging: IIO: IMU: ADIS16400: Fix addresses of GYRO and ACCEL calibration offset
  staging: IIO: IMU: ADIS16400: Add delay after self test
  staging: IIO: IMU: ADIS16400: Fix up SPI messages cs_change behavior
  staging/rtl81*: build as loadable modules only
  staging: brcm80211: removed 'is_amsdu causing toss' log spam
  staging: brcm80211: fix for 'Short CCK' log spam
  staging: brcm80211: fix for 'AC_BE txop..' logs spammed problem
  staging: memrar: remove driver from tree
  staging: sep: remove last memrar remnants
  staging: fix hv_mouse build, needs delay.h
  staging: fix olpc_dcon build errors
  staging: sm7xx: fixed defines
  ...

Fix up trivial conflict in drivers/staging/memrar/memrar_handler.c
(deleted vs trivial spelling fixes)
2011-04-07 11:36:44 -07:00
..
brcmfmac Fix common misspellings 2011-03-31 11:26:23 -03:00
brcmsmac Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 2011-04-07 11:36:44 -07:00
include Fix common misspellings 2011-03-31 11:26:23 -03:00
util Fix common misspellings 2011-03-31 11:26:23 -03:00
Kconfig staging: brcm80211: allow both driver are created in single build 2011-02-04 13:29:10 -08:00
Makefile staging: brcm80211: allow both driver are created in single build 2011-02-04 13:29:10 -08:00
README Fix common misspellings 2011-03-31 11:26:23 -03:00
TODO staging: brcm80211: updated maintainers contact information 2010-11-29 10:53:14 -08:00

Broadcom Mac80211 driver

This is a driver in progress.  It has features still to be implemented well as
bugs in current code.


What's here and not here
=======================
- Completely open source host driver, no binary object files
- Features Broadcom's OneDriver architecture (single source base for
  supported chips and architectures)
- On-chip firmware loaded using standard request_firmware()
- Support for BCM43224, BCM43225, BCM4313 (PCIe NIC)
- Framework for supporting new chips, including mac80211-aware embedded chips
- Does not support older PCI/PCIe chips with SSB backplane
- Driver includes BMAC interface for transparent dongle support
- Uses minstrel_ht rate algorithm
- HW based encryption not enabled yet


What's done
==========
- Integration with mac80211 stack
- A-MPDU single & dual stream rates
- BCM43224:	Dualband, Dual stream, 20MHz channels
	Throughput (in chamber): ~85-90 Mbits/sec (in both 2.4 & 5 GHz bands)
- BCM43225:	2.4 GHz, Dual Stream, 20MHz channels
	Throughput (in chamber): ~85-90 Mbits/sec
- BCM4313:		2.4 GHz, Single Stream
	Throughput (in chamber): ~40 Mbits/sec


Things To Be Done
=================
See the TODO file


Firmware installation
======================
Firmware is available from the Linux firmware repository at:

	git://git.kernel.org/pub/scm/linux/kernel/git/dwmw2/linux-firmware.git
	http://git.kernel.org/?p=linux/kernel/git/dwmw2/linux-firmware.git
	https://git.kernel.org/?p=linux/kernel/git/dwmw2/linux-firmware.git

For all chips, copy brcm/bcm43xx-0.fw and brcm/bcm43xx_hdr-0.fw to
/lib/firmware/brcm (or wherever firmware is normally installed on your system).

Currently supported chips
==============
PCI
Name		Device ID
BCM4313		0x4727
BCM43224	0x4353
BCM43225	0x4357


Bugs/Problems
==============
- Driver can get confused while scanning during high throughput, can cause
  burping, hanging, and possible crashing.
- Occasional hangs & burps with BCM43224 on 2.4 GHz with dual stream rates.
- Occasional crashes with BCM43224 on multicore machines.


Note on Regulatory Implementation
================================
This generation of chips contain additional regulatory support independent of
the driver. The devices use a single worldwide regulatory domain, with channels
12-14 (2.4 GHz band) and channels 52-64 and 100-140 (5 GHz band) restricted to
passive operation. Transmission on those channels is suppressed until
appropriate other traffic is observed on those channels.

Within the driver, we use the fictitious country code "X2" to represent this
worldwide regulatory domain. There is currently no interface to configure a
different domain.

The driver reads the SROM country code from the chip and hands it up to
mac80211 as the regulatory hint, however this information is otherwise unused
with the driver.


Contact Info:
=============
Brett Rudley		brudley@broadcom.com
Henry Ptasinski		henryp@broadcom.com
Dowan Kim			dowan@broadcom.com
Roland Vossen		rvossen@broadcom.com
Arend van Spriel	arend@broadcom.com