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/* Copyright (c) 2019, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that 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.
*/
#ifndef _LINUX_VIRTIO_SPMI_H
#define _LINUX_VIRTIO_SPMI_H
#include <linux/types.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_config.h>
#include <linux/virtio_types.h>
/* Feature bits */
#define VIRTIO_SPMI_F_INT 1 /* Support interrupt */
#define VM_MAX_PERIPHS 512
/* Configuration layout */
struct virtio_spmi_config {
__u16 ppid_allowed[VM_MAX_PERIPHS];
} __packed;
struct payload_cmd {
__virtio32 data[2];
};
struct payload_irq {
__virtio32 ppid;
__virtio32 val;
};
union payload_data {
struct payload_cmd cmdd;
struct payload_irq irqd;
};
struct virtio_spmi_msg {
__virtio32 type;
__virtio32 len;
__virtio32 res;
union {
__virtio32 cmd;
__virtio32 cnt;
} u;
union payload_data payload[];
};
/* Virtio SPMI message type */
enum vio_spmi_msg_type {
VIO_SPMI_BUS_WRITE = 0,
VIO_SPMI_BUS_READ = 1,
VIO_ACC_ENABLE_WR = 2,
VIO_ACC_ENABLE_RD = 3,
VIO_IRQ_CLEAR = 4,
VIO_IRQ_STATUS = 5,
};
/* Virtio SPMI message type */
enum vio_spmi_msg_res {
VIO_SPMI_DONE = 0,
VIO_SPMI_ERR = 1,
};
/* payload fix size and one payload_data size */
#define MSG_FIX_SZ (sizeof(struct virtio_spmi_msg))
#define PER_PLD_SZ (sizeof(union payload_data))
#define MSG_SZ(x) (MSG_FIX_SZ + ((PER_PLD_SZ) * (x)))
#endif /* _LINUX_VIRTIO_SPMI_H */
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