drivers/net/wireless/broadcom/b43legacy/main.h

Source file repositories/reference/linux-study-clean/drivers/net/wireless/broadcom/b43legacy/main.h

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/broadcom/b43legacy/main.h
Extension
.h
Size
2992 bytes
Lines
115
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

Broadcom B43legacy wireless driver

  Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
  Copyright (c) 2005 Stefano Brivio <stefano.brivio@polimi.it>
  Copyright (c) 2005, 2006 Michael Buesch <m@bues.ch>
  Copyright (c) 2005  Danny van Dyk <kugelfang@gentoo.org>
  Copyright (c) 2005  Andreas Jaggi <andreas.jaggi@waterwave.ch>
  Copyright (c) 2007  Larry Finger <Larry.Finger@lwfinger.net>

  Some parts of the code in this file are derived from the ipw2200
  driver  Copyright(c) 2003 - 2004 Intel Corporation.


*/

#ifndef B43legacy_MAIN_H_
#define B43legacy_MAIN_H_

#include "b43legacy.h"


#define P4D_BYT3S(magic, nr_bytes)	u8 __p4dding##magic[nr_bytes]
#define P4D_BYTES(line, nr_bytes)	P4D_BYT3S(line, nr_bytes)
/* Magic helper macro to pad structures. Ignore those above. It's magic. */
#define PAD_BYTES(nr_bytes)		P4D_BYTES(__LINE__ , (nr_bytes))


/* Lightweight function to convert a frequency (in Mhz) to a channel number. */
static inline
u8 b43legacy_freq_to_channel_bg(int freq)
{
	u8 channel;

	if (freq == 2484)
		channel = 14;
	else
		channel = (freq - 2407) / 5;

	return channel;
}
static inline
u8 b43legacy_freq_to_channel(struct b43legacy_wldev *dev,
			     int freq)
{
	return b43legacy_freq_to_channel_bg(freq);
}

/* Lightweight function to convert a channel number to a frequency (in Mhz). */
static inline
int b43legacy_channel_to_freq_bg(u8 channel)
{
	int freq;

	if (channel == 14)
		freq = 2484;
	else
		freq = 2407 + (5 * channel);

	return freq;
}

static inline
int b43legacy_channel_to_freq(struct b43legacy_wldev *dev,
			      u8 channel)
{
	return b43legacy_channel_to_freq_bg(channel);
}

static inline
int b43legacy_is_cck_rate(int rate)
{
	return (rate == B43legacy_CCK_RATE_1MB ||
		rate == B43legacy_CCK_RATE_2MB ||
		rate == B43legacy_CCK_RATE_5MB ||
		rate == B43legacy_CCK_RATE_11MB);
}

static inline
int b43legacy_is_ofdm_rate(int rate)
{
	return !b43legacy_is_cck_rate(rate);
}

void b43legacy_tsf_read(struct b43legacy_wldev *dev, u64 *tsf);
void b43legacy_tsf_write(struct b43legacy_wldev *dev, u64 tsf);

u32 b43legacy_shm_read32(struct b43legacy_wldev *dev,
			 u16 routing, u16 offset);
u16 b43legacy_shm_read16(struct b43legacy_wldev *dev,
			 u16 routing, u16 offset);

Annotation

Implementation Notes