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drivers/fmc/fmc-match.c
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FMC: add core bus...
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/*
* Copyright (C) 2012 CERN (www.cern.ch)
* Author: Alessandro Rubini <rubini@gnudd.com>
*
* Released according to the GNU GPL, version 2 or any later version.
*
* This work is part of the White Rabbit project, a research effort led
* by CERN, the European Institute for Nuclear Research.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/fmc.h>
#include <linux/ipmi-fru.h>
/* The fru parser is both user and kernel capable: it needs alloc */
void *fru_alloc(size_t size)
{
return kzalloc(size, GFP_KERNEL);
}
/* The actual match function */
int fmc_match(struct device *dev, struct device_driver *drv)
{
struct fmc_driver *fdrv = to_fmc_driver(drv);
struct fmc_device *fdev = to_fmc_device(dev);
struct fmc_fru_id *fid;
int i, matched = 0;
/* This currently only matches the EEPROM (FRU id) */
fid = fdrv->id_table.fru_id;
if (!fid) {
dev_warn(&fdev->dev, "Driver has no ID: matches all
");
matched = 1;
} else {
if (!fdev->id.manufacturer || !fdev->id.product_name)
return 0; /* the device has no FRU information */
for (i = 0; i < fdrv->id_table.fru_id_nr; i++, fid++) {
if (fid->manufacturer &&
strcmp(fid->manufacturer, fdev->id.manufacturer))
continue;
if (fid->product_name &&
strcmp(fid->product_name, fdev->id.product_name))
continue;
matched = 1;
break;
}
}
/* FIXME: match SDB contents */
return matched;
}
/* This function creates ID info for a newly registered device */
int fmc_fill_id_info(struct fmc_device *fmc)
{
struct fru_common_header *h;
struct fru_board_info_area *bia;
int ret, allocated = 0;
/* If we know the eeprom length, try to read it off the device */
if (fmc->eeprom_len && !fmc->eeprom) {
fmc->eeprom = kzalloc(fmc->eeprom_len, GFP_KERNEL);
if (!fmc->eeprom)
return -ENOMEM;
allocated = 1;
ret = fmc->op->read_ee(fmc, 0, fmc->eeprom, fmc->eeprom_len);
if (ret < 0)
goto out;
}
/* If no eeprom, continue with other matches */
if (!fmc->eeprom)
return 0;
dev_info(fmc->hwdev, "mezzanine %i
", fmc->slot_id); /* header */
/* So we have the eeprom: parse the FRU part (if any) */
h = (void *)fmc->eeprom;
if (h->format != 1) {
pr_info(" EEPROM has no FRU information
");
goto out;
}
if (!fru_header_cksum_ok(h)) {
pr_info(" FRU: wrong header checksum
");
goto out;
}
bia = fru_get_board_area(h);
if (!fru_bia_cksum_ok(bia)) {
pr_info(" FRU: wrong board area checksum
");
goto out;
}
fmc->id.manufacturer = fru_get_board_manufacturer(h);
fmc->id.product_name = fru_get_product_name(h);
pr_info(" Manufacturer: %s
", fmc->id.manufacturer);
pr_info(" Product name: %s
", fmc->id.product_name);
/* Create the short name (FIXME: look in sdb as well) */
fmc->mezzanine_name = kstrdup(fmc->id.product_name, GFP_KERNEL);
out:
if (allocated) {
kfree(fmc->eeprom);
fmc->eeprom = NULL;
}
return 0; /* no error: let other identification work */
}
/* Some ID data is allocated using fru_alloc() above, so release it */
void fmc_free_id_info(struct fmc_device *fmc)
{
kfree(fmc->mezzanine_name);
kfree(fmc->id.manufacturer);
kfree(fmc->id.product_name);
}
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