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/*
* Firmware loading and handling functions.
*/
#include <linux/firmware.h>
#include <linux/module.h>
#include "decl.h"
/**
* lbs_get_firmware - Retrieves two-stage firmware
*
* @dev: A pointer to &device structure
* @card_model: Bus-specific card model ID used to filter firmware table
* elements
* @fw_table: Table of firmware file names and device model numbers
* terminated by an entry with a NULL helper name
* @helper: On success, the helper firmware; caller must free
* @mainfw: On success, the main firmware; caller must free
*
* returns: 0 on success, non-zero on failure
*/
int lbs_get_firmware(struct device *dev, u32 card_model,
const struct lbs_fw_table *fw_table,
const struct firmware **helper,
const struct firmware **mainfw)
{
const struct lbs_fw_table *iter;
int ret;
BUG_ON(helper == NULL);
BUG_ON(mainfw == NULL);
/* Search for firmware to use from the table. */
iter = fw_table;
while (iter && iter->helper) {
if (iter->model != card_model)
goto next;
if (*helper == NULL) {
ret = request_firmware(helper, iter->helper, dev);
if (ret)
goto next;
/* If the device has one-stage firmware (ie cf8305) and
* we've got it then we don't need to bother with the
* main firmware.
*/
if (iter->fwname == NULL)
return 0;
}
if (*mainfw == NULL) {
ret = request_firmware(mainfw, iter->fwname, dev);
if (ret) {
/* Clear the helper to ensure we don't have
* mismatched firmware pairs.
*/
release_firmware(*helper);
*helper = NULL;
}
}
if (*helper && *mainfw)
return 0;
next:
iter++;
}
/* Failed */
release_firmware(*helper);
*helper = NULL;
release_firmware(*mainfw);
*mainfw = NULL;
return -ENOENT;
}
EXPORT_SYMBOL_GPL(lbs_get_firmware);
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