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// SPDX-License-Identifier: ISC
/*
* Copyright (c) 2022 Broadcom Corporation
*/
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/list.h>
#include <linux/completion.h>
#include <linux/mutex.h>
#include <linux/printk.h>
#include <linux/jiffies.h>
#include <linux/workqueue.h>
#include "core.h"
#include "bus.h"
#include "debug.h"
#include "fwvid.h"
#include "wcc/vops.h"
#include "cyw/vops.h"
#include "bca/vops.h"
struct brcmf_fwvid_entry {
const char *name;
const struct brcmf_fwvid_ops *vops;
struct list_head drvr_list;
#if IS_MODULE(CONFIG_BRCMFMAC)
struct module *vmod;
struct completion reg_done;
#endif
};
static DEFINE_MUTEX(fwvid_list_lock);
#if IS_MODULE(CONFIG_BRCMFMAC)
#define FWVID_ENTRY_INIT(_vid, _name) \
[BRCMF_FWVENDOR_ ## _vid] = { \
.name = #_name, \
.reg_done = COMPLETION_INITIALIZER(fwvid_list[BRCMF_FWVENDOR_ ## _vid].reg_done), \
.drvr_list = LIST_HEAD_INIT(fwvid_list[BRCMF_FWVENDOR_ ## _vid].drvr_list), \
}
#else
#define FWVID_ENTRY_INIT(_vid, _name) \
[BRCMF_FWVENDOR_ ## _vid] = { \
.name = #_name, \
.drvr_list = LIST_HEAD_INIT(fwvid_list[BRCMF_FWVENDOR_ ## _vid].drvr_list), \
.vops = _vid ## _VOPS \
}
#endif /* IS_MODULE(CONFIG_BRCMFMAC) */
static struct brcmf_fwvid_entry fwvid_list[BRCMF_FWVENDOR_NUM] = {
FWVID_ENTRY_INIT(WCC, wcc),
FWVID_ENTRY_INIT(CYW, cyw),
FWVID_ENTRY_INIT(BCA, bca),
};
#if IS_MODULE(CONFIG_BRCMFMAC)
static int brcmf_fwvid_request_module(enum brcmf_fwvendor fwvid)
{
int ret;
if (!fwvid_list[fwvid].vmod) {
struct completion *reg_done = &fwvid_list[fwvid].reg_done;
mutex_unlock(&fwvid_list_lock);
ret = request_module("brcmfmac-%s", fwvid_list[fwvid].name);
if (ret)
goto fail;
ret = wait_for_completion_interruptible(reg_done);
if (ret)
goto fail;
mutex_lock(&fwvid_list_lock);
}
return 0;
fail:
brcmf_err("mod=%s: failed %d\n", fwvid_list[fwvid].name, ret);
return ret;
}
int brcmf_fwvid_register_vendor(enum brcmf_fwvendor fwvid, struct module *vmod,
const struct brcmf_fwvid_ops *vops)
{
if (fwvid >= BRCMF_FWVENDOR_NUM)
return -ERANGE;
if (WARN_ON(!vmod) || WARN_ON(!vops) ||
WARN_ON(!vops->attach) || WARN_ON(!vops->detach))
return -EINVAL;
if (WARN_ON(fwvid_list[fwvid].vmod))
return -EEXIST;
brcmf_dbg(TRACE, "mod=%s: enter\n", fwvid_list[fwvid].name);
mutex_lock(&fwvid_list_lock);
fwvid_list[fwvid].vmod = vmod;
fwvid_list[fwvid].vops = vops;
mutex_unlock(&fwvid_list_lock);
complete_all(&fwvid_list[fwvid].reg_done);
return 0;
}
BRCMF_EXPORT_SYMBOL_GPL(brcmf_fwvid_register_vendor);
int brcmf_fwvid_unregister_vendor(enum brcmf_fwvendor fwvid, struct module *mod)
{
struct brcmf_bus *bus, *tmp;
if (fwvid >= BRCMF_FWVENDOR_NUM)
return -ERANGE;
if (WARN_ON(fwvid_list[fwvid].vmod != mod))
return -ENOENT;
mutex_lock(&fwvid_list_lock);
list_for_each_entry_safe(bus, tmp, &fwvid_list[fwvid].drvr_list, list) {
mutex_unlock(&fwvid_list_lock);
brcmf_dbg(INFO, "mod=%s: removing %s\n", fwvid_list[fwvid].name,
dev_name(bus->dev));
brcmf_bus_remove(bus);
mutex_lock(&fwvid_list_lock);
}
fwvid_list[fwvid].vmod = NULL;
fwvid_list[fwvid].vops = NULL;
reinit_completion(&fwvid_list[fwvid].reg_done);
brcmf_dbg(TRACE, "mod=%s: exit\n", fwvid_list[fwvid].name);
mutex_unlock(&fwvid_list_lock);
return 0;
}
BRCMF_EXPORT_SYMBOL_GPL(brcmf_fwvid_unregister_vendor);
#else
static inline int brcmf_fwvid_request_module(enum brcmf_fwvendor fwvid)
{
return 0;
}
#endif
int brcmf_fwvid_attach_ops(struct brcmf_pub *drvr)
{
enum brcmf_fwvendor fwvid = drvr->bus_if->fwvid;
int ret;
if (fwvid >= ARRAY_SIZE(fwvid_list))
return -ERANGE;
brcmf_dbg(TRACE, "mod=%s: enter: dev %s\n", fwvid_list[fwvid].name,
dev_name(drvr->bus_if->dev));
mutex_lock(&fwvid_list_lock);
ret = brcmf_fwvid_request_module(fwvid);
if (ret)
return ret;
drvr->vops = fwvid_list[fwvid].vops;
list_add(&drvr->bus_if->list, &fwvid_list[fwvid].drvr_list);
mutex_unlock(&fwvid_list_lock);
return ret;
}
void brcmf_fwvid_detach_ops(struct brcmf_pub *drvr)
{
enum brcmf_fwvendor fwvid = drvr->bus_if->fwvid;
if (fwvid >= ARRAY_SIZE(fwvid_list))
return;
brcmf_dbg(TRACE, "mod=%s: enter: dev %s\n", fwvid_list[fwvid].name,
dev_name(drvr->bus_if->dev));
mutex_lock(&fwvid_list_lock);
drvr->vops = NULL;
list_del(&drvr->bus_if->list);
mutex_unlock(&fwvid_list_lock);
}
const char *brcmf_fwvid_vendor_name(struct brcmf_pub *drvr)
{
return fwvid_list[drvr->bus_if->fwvid].name;
}
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