linux/drivers/ssb/sprom.c

/*
 * Sonics Silicon Backplane
 * Common SPROM support routines
 *
 * Copyright (C) 2005-2008 Michael Buesch <[email protected]>
 * Copyright (C) 2005 Martin Langer <[email protected]>
 * Copyright (C) 2005 Stefano Brivio <[email protected]>
 * Copyright (C) 2005 Danny van Dyk <[email protected]>
 * Copyright (C) 2005 Andreas Jaggi <[email protected]>
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */

#include "ssb_private.h"

#include <linux/ctype.h>
#include <linux/slab.h>


static int(*get_fallback_sprom)(struct ssb_bus *dev, struct ssb_sprom *out);


static int sprom2hex(const u16 *sprom, char *buf, size_t buf_len,
		     size_t sprom_size_words)
{ … }

static int hex2sprom(u16 *sprom, const char *dump, size_t len,
		     size_t sprom_size_words)
{ … }

/* Common sprom device-attribute show-handler */
ssize_t ssb_attr_sprom_show(struct ssb_bus *bus, char *buf,
			    int (*sprom_read)(struct ssb_bus *bus, u16 *sprom))
{ … }

/* Common sprom device-attribute store-handler */
ssize_t ssb_attr_sprom_store(struct ssb_bus *bus,
			     const char *buf, size_t count,
			     int (*sprom_check_crc)(const u16 *sprom, size_t size),
			     int (*sprom_write)(struct ssb_bus *bus, const u16 *sprom))
{ … }

/**
 * ssb_arch_register_fallback_sprom - Registers a method providing a
 * fallback SPROM if no SPROM is found.
 *
 * @sprom_callback: The callback function.
 *
 * With this function the architecture implementation may register a
 * callback handler which fills the SPROM data structure. The fallback is
 * only used for PCI based SSB devices, where no valid SPROM can be found
 * in the shadow registers.
 *
 * This function is useful for weird architectures that have a half-assed
 * SSB device hardwired to their PCI bus.
 *
 * Note that it does only work with PCI attached SSB devices. PCMCIA
 * devices currently don't use this fallback.
 * Architectures must provide the SPROM for native SSB devices anyway, so
 * the fallback also isn't used for native devices.
 *
 * This function is available for architecture code, only. So it is not
 * exported.
 */
int ssb_arch_register_fallback_sprom(int (*sprom_callback)(struct ssb_bus *bus,
				     struct ssb_sprom *out))
{ … }

int ssb_fill_sprom_with_fallback(struct ssb_bus *bus, struct ssb_sprom *out)
{ … }

/* https://bcm-v4.sipsolutions.net/802.11/IsSpromAvailable */
bool ssb_is_sprom_available(struct ssb_bus *bus)
{ … }