fb657461ab
Fix the documentation to have the current firmware filenames and use the correct path. Signed-off-by: Henry Ptasinski <henryp@broadcom.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
91 lines
2.9 KiB
Plaintext
91 lines
2.9 KiB
Plaintext
Broadcom Mac80211 driver
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This is a driver in progress. It has features still to be implemented well as
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bugs in current code.
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What's here and not here
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=======================
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- Completely open source host driver, no binary object files
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- Features Broadcom's OneDriver architecture (single source base for
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supported chips and architectures)
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- On-chip firmware loaded using standard request_firmware()
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- Support for BCM43224, BCM43225, BCM4313 (PCIe NIC)
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- Framework for supporting new chips, including mac80211-aware embedded chips
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- Does not support older PCI/PCIe chips with SSB backplane
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- Driver includes BMAC interface for transparent dongle support
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- Uses minstrel_ht rate algorithm
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- HW based encryption not enabled yet
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What's done
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==========
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- Integration with mac80211 stack
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- A-MPDU single & dual stream rates
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- BCM43224: Dualband, Dual stream, 20MHz channels
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Throughput (in chamber): ~85-90 Mbits/sec (in both 2.4 & 5 GHz bands)
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- BCM43225: 2.4 GHz, Dual Stream, 20MHz channels
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Throughput (in chamber): ~85-90 Mbits/sec
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- BCM4313: 2.4 GHz, Single Stream
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Throughput (in chamber): ~40 Mbits/sec
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Things To Be Done
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=================
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See the TODO file
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Firmware installation
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======================
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Firmware is available from the Linux firmware repository at:
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git://git.kernel.org/pub/scm/linux/kernel/git/dwmw2/linux-firmware.git
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http://git.kernel.org/?p=linux/kernel/git/dwmw2/linux-firmware.git
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https://git.kernel.org/?p=linux/kernel/git/dwmw2/linux-firmware.git
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For all chips, copy brcm/bcm43xx-0.fw and brcm/bcm43xx_hdr-0.fw to
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/lib/firmware/brcm (or wherever firmware is normally installed on your system).
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Currently supported chips
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==============
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PCI
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Name Device ID
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BCM4313 0x4727
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BCM43224 0x4353
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BCM43225 0x4357
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Bugs/Problems
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==============
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- Driver can get confused while scanning during high throughput, can cause
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burping, hanging, and possible crashing.
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- Occasional hangs & burps with BCM43224 on 2.4 GHz with dual stream rates.
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- Occasional crashes with BCM43224 on multicore machines.
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Note on Regulatory Implementation
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================================
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This generation of chips contain additional regulatory support independent of
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the driver. The devices use a single worldwide regulatory domain, with channels
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12-14 (2.4 GHz band) and channels 52-64 and 100-140 (5 GHz band) restricted to
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passive operation. Transmission on those channels is suppressed until
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appropriate other traffic is observed on those channels.
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Within the driver, we use the ficticious country code "X2" to represent this
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worldwide regulatory domain. There is currently no interface to configure a
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different domain.
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The driver reads the SROM country code from the chip and hands it up to
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mac80211 as the regulatory hint, however this information is otherwise unused
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with the driver.
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Contact Info:
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=============
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Brett Rudley brudley@broadcom.com
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Henry Ptasinski henryp@broadcom.com
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Dowan Kim dowan@broadcom.com
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Roland Vossen rvossen@broadcom.com
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Arend van Spriel arend@broadcom.com
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