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1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef __QCOM_APR_H_
4#define __QCOM_APR_H_
5
6#include <linux/spinlock.h>
7#include <linux/device.h>
8#include <linux/mod_devicetable.h>
9#include <dt-bindings/soc/qcom,apr.h>
10
11extern struct bus_type aprbus;
12
13#define APR_HDR_LEN(hdr_len) ((hdr_len)/4)
14
15/*
16 * HEADER field
17 * version:0:3
18 * header_size : 4:7
19 * message_type : 8:9
20 * reserved: 10:15
21 */
22#define APR_HDR_FIELD(msg_type, hdr_len, ver)\
23 (((msg_type & 0x3) << 8) | ((hdr_len & 0xF) << 4) | (ver & 0xF))
24
25#define APR_HDR_SIZE sizeof(struct apr_hdr)
26#define APR_SEQ_CMD_HDR_FIELD APR_HDR_FIELD(APR_MSG_TYPE_SEQ_CMD, \
27 APR_HDR_LEN(APR_HDR_SIZE), \
28 APR_PKT_VER)
29/* Version */
30#define APR_PKT_VER 0x0
31
32/* Command and Response Types */
33#define APR_MSG_TYPE_EVENT 0x0
34#define APR_MSG_TYPE_CMD_RSP 0x1
35#define APR_MSG_TYPE_SEQ_CMD 0x2
36#define APR_MSG_TYPE_NSEQ_CMD 0x3
37#define APR_MSG_TYPE_MAX 0x04
38
39/* APR Basic Response Message */
40#define APR_BASIC_RSP_RESULT 0x000110E8
41#define APR_RSP_ACCEPTED 0x000100BE
42
43struct aprv2_ibasic_rsp_result_t {
44 uint32_t opcode;
45 uint32_t status;
46};
47
48/* hdr field Ver [0:3], Size [4:7], Message type [8:10] */
49#define APR_HDR_FIELD_VER(h) (h & 0x000F)
50#define APR_HDR_FIELD_SIZE(h) ((h & 0x00F0) >> 4)
51#define APR_HDR_FIELD_SIZE_BYTES(h) (((h & 0x00F0) >> 4) * 4)
52#define APR_HDR_FIELD_MT(h) ((h & 0x0300) >> 8)
53
54struct apr_hdr {
55 uint16_t hdr_field;
56 uint16_t pkt_size;
57 uint8_t src_svc;
58 uint8_t src_domain;
59 uint16_t src_port;
60 uint8_t dest_svc;
61 uint8_t dest_domain;
62 uint16_t dest_port;
63 uint32_t token;
64 uint32_t opcode;
65} __packed;
66
67struct apr_pkt {
68 struct apr_hdr hdr;
69 uint8_t payload[];
70};
71
72struct apr_resp_pkt {
73 struct apr_hdr hdr;
74 void *payload;
75 int payload_size;
76};
77
78/* Bits 0 to 15 -- Minor version, Bits 16 to 31 -- Major version */
79#define APR_SVC_MAJOR_VERSION(v) ((v >> 16) & 0xFF)
80#define APR_SVC_MINOR_VERSION(v) (v & 0xFF)
81
82struct apr_device {
83 struct device dev;
84 uint16_t svc_id;
85 uint16_t domain_id;
86 uint32_t version;
87 char name[APR_NAME_SIZE];
88 const char *service_path;
89 spinlock_t lock;
90 struct list_head node;
91};
92
93#define to_apr_device(d) container_of(d, struct apr_device, dev)
94
95struct apr_driver {
96 int (*probe)(struct apr_device *sl);
97 int (*remove)(struct apr_device *sl);
98 int (*callback)(struct apr_device *a,
99 struct apr_resp_pkt *d);
100 struct device_driver driver;
101 const struct apr_device_id *id_table;
102};
103
104#define to_apr_driver(d) container_of(d, struct apr_driver, driver)
105
106/*
107 * use a macro to avoid include chaining to get THIS_MODULE
108 */
109#define apr_driver_register(drv) __apr_driver_register(drv, THIS_MODULE)
110
111int __apr_driver_register(struct apr_driver *drv, struct module *owner);
112void apr_driver_unregister(struct apr_driver *drv);
113
114/**
115 * module_apr_driver() - Helper macro for registering a aprbus driver
116 * @__apr_driver: apr_driver struct
117 *
118 * Helper macro for aprbus drivers which do not do anything special in
119 * module init/exit. This eliminates a lot of boilerplate. Each module
120 * may only use this macro once, and calling it replaces module_init()
121 * and module_exit()
122 */
123#define module_apr_driver(__apr_driver) \
124 module_driver(__apr_driver, apr_driver_register, \
125 apr_driver_unregister)
126
127int apr_send_pkt(struct apr_device *adev, struct apr_pkt *pkt);
128
129#endif /* __QCOM_APR_H_ */