mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 11:44:22 +07:00
938d007157
hid/intel-ish-hid does not use any miscdevice so this patch remove this unnecessary inclusion. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
|
|
* Initialization protocol for ISHTP driver
|
|
*
|
|
* Copyright (c) 2003-2016, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sched.h>
|
|
#include "ishtp-dev.h"
|
|
#include "hbm.h"
|
|
#include "client.h"
|
|
|
|
/**
|
|
* ishtp_dev_state_str() -Convert to string format
|
|
* @state: state to convert
|
|
*
|
|
* Convert state to string for prints
|
|
*
|
|
* Return: character pointer to converted string
|
|
*/
|
|
const char *ishtp_dev_state_str(int state)
|
|
{
|
|
switch (state) {
|
|
case ISHTP_DEV_INITIALIZING:
|
|
return "INITIALIZING";
|
|
case ISHTP_DEV_INIT_CLIENTS:
|
|
return "INIT_CLIENTS";
|
|
case ISHTP_DEV_ENABLED:
|
|
return "ENABLED";
|
|
case ISHTP_DEV_RESETTING:
|
|
return "RESETTING";
|
|
case ISHTP_DEV_DISABLED:
|
|
return "DISABLED";
|
|
case ISHTP_DEV_POWER_DOWN:
|
|
return "POWER_DOWN";
|
|
case ISHTP_DEV_POWER_UP:
|
|
return "POWER_UP";
|
|
default:
|
|
return "unknown";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ishtp_device_init() - ishtp device init
|
|
* @dev: ISHTP device instance
|
|
*
|
|
* After ISHTP device is alloacted, this function is used to initialize
|
|
* each field which includes spin lock, work struct and lists
|
|
*/
|
|
void ishtp_device_init(struct ishtp_device *dev)
|
|
{
|
|
dev->dev_state = ISHTP_DEV_INITIALIZING;
|
|
INIT_LIST_HEAD(&dev->cl_list);
|
|
INIT_LIST_HEAD(&dev->device_list);
|
|
dev->rd_msg_fifo_head = 0;
|
|
dev->rd_msg_fifo_tail = 0;
|
|
spin_lock_init(&dev->rd_msg_spinlock);
|
|
|
|
init_waitqueue_head(&dev->wait_hbm_recvd_msg);
|
|
spin_lock_init(&dev->read_list_spinlock);
|
|
spin_lock_init(&dev->device_lock);
|
|
spin_lock_init(&dev->device_list_lock);
|
|
spin_lock_init(&dev->cl_list_lock);
|
|
spin_lock_init(&dev->fw_clients_lock);
|
|
INIT_WORK(&dev->bh_hbm_work, bh_hbm_work_fn);
|
|
|
|
bitmap_zero(dev->host_clients_map, ISHTP_CLIENTS_MAX);
|
|
dev->open_handle_count = 0;
|
|
|
|
/*
|
|
* Reserving client ID 0 for ISHTP Bus Message communications
|
|
*/
|
|
bitmap_set(dev->host_clients_map, 0, 1);
|
|
|
|
INIT_LIST_HEAD(&dev->read_list.list);
|
|
|
|
}
|
|
EXPORT_SYMBOL(ishtp_device_init);
|
|
|
|
/**
|
|
* ishtp_start() - Start ISH processing
|
|
* @dev: ISHTP device instance
|
|
*
|
|
* Start ISHTP processing by sending query subscriber message
|
|
*
|
|
* Return: 0 on success else -ENODEV
|
|
*/
|
|
int ishtp_start(struct ishtp_device *dev)
|
|
{
|
|
if (ishtp_hbm_start_wait(dev)) {
|
|
dev_err(dev->devc, "HBM haven't started");
|
|
goto err;
|
|
}
|
|
|
|
/* suspend & resume notification - send QUERY_SUBSCRIBERS msg */
|
|
ishtp_query_subscribers(dev);
|
|
|
|
return 0;
|
|
err:
|
|
dev_err(dev->devc, "link layer initialization failed.\n");
|
|
dev->dev_state = ISHTP_DEV_DISABLED;
|
|
return -ENODEV;
|
|
}
|
|
EXPORT_SYMBOL(ishtp_start);
|