drivers/net/wireless/broadcom/b43/ppr.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/broadcom/b43/ppr.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/broadcom/b43/ppr.c
Extension
.c
Size
4950 bytes
Lines
191
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

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Broadcom B43 wireless driver
 * PPR (Power Per Rate) management
 *
 * Copyright (c) 2014 Rafał Miłecki <zajec5@gmail.com>
 */

#include "ppr.h"
#include "b43.h"

#define ppr_for_each_entry(ppr, i, entry)				\
	for (i = 0, entry = &(ppr)->__all_rates[i];			\
	     i < B43_PPR_RATES_NUM;					\
	     i++, entry++)

void b43_ppr_clear(struct b43_wldev *dev, struct b43_ppr *ppr)
{
	memset(ppr, 0, sizeof(*ppr));

	/* Compile-time PPR check */
	BUILD_BUG_ON(sizeof(struct b43_ppr) != B43_PPR_RATES_NUM * sizeof(u8));
}

void b43_ppr_add(struct b43_wldev *dev, struct b43_ppr *ppr, int diff)
{
	int i;
	u8 *rate;

	ppr_for_each_entry(ppr, i, rate) {
		*rate = clamp_val(*rate + diff, 0, 127);
	}
}

void b43_ppr_apply_max(struct b43_wldev *dev, struct b43_ppr *ppr, u8 max)
{
	int i;
	u8 *rate;

	ppr_for_each_entry(ppr, i, rate) {
		*rate = min(*rate, max);
	}
}

void b43_ppr_apply_min(struct b43_wldev *dev, struct b43_ppr *ppr, u8 min)
{
	int i;
	u8 *rate;

	ppr_for_each_entry(ppr, i, rate) {
		*rate = max(*rate, min);
	}
}

u8 b43_ppr_get_max(struct b43_wldev *dev, struct b43_ppr *ppr)
{
	u8 res = 0;
	int i;
	u8 *rate;

	ppr_for_each_entry(ppr, i, rate) {
		res = max(*rate, res);
	}

	return res;
}

bool b43_ppr_load_max_from_sprom(struct b43_wldev *dev, struct b43_ppr *ppr,
				 enum b43_band band)
{
	struct b43_ppr_rates *rates = &ppr->rates;
	struct ssb_sprom *sprom = dev->dev->bus_sprom;
	struct b43_phy *phy = &dev->phy;
	u8 maxpwr, off;
	u32 sprom_ofdm_po;
	u16 *sprom_mcs_po;
	u8 extra_cdd_po, extra_stbc_po;
	int i;

	switch (band) {
	case B43_BAND_2G:
		maxpwr = min(sprom->core_pwr_info[0].maxpwr_2g,
			     sprom->core_pwr_info[1].maxpwr_2g);
		sprom_ofdm_po = sprom->ofdm2gpo;
		sprom_mcs_po = sprom->mcs2gpo;
		extra_cdd_po = (sprom->cddpo >> 0) & 0xf;
		extra_stbc_po = (sprom->stbcpo >> 0) & 0xf;
		break;
	case B43_BAND_5G_LO:
		maxpwr = min(sprom->core_pwr_info[0].maxpwr_5gl,

Annotation

Implementation Notes