1 /* SPDX-License-Identifier: GPL-2.0-only */ 1 /* SPDX-License-Identifier: GPL-2.0-only */
2 2
3 #ifndef __PSP_PLATFORM_ACCESS_H 3 #ifndef __PSP_PLATFORM_ACCESS_H
4 #define __PSP_PLATFORM_ACCESS_H 4 #define __PSP_PLATFORM_ACCESS_H
5 5
6 #include <linux/psp.h> 6 #include <linux/psp.h>
7 7
8 enum psp_platform_access_msg { 8 enum psp_platform_access_msg {
9 PSP_CMD_NONE = 0x0, !! 9 PSP_CMD_NONE = 0x0,
10 PSP_CMD_HSTI_QUERY = 0x14 !! 10 PSP_I2C_REQ_BUS_CMD = 0x64,
11 PSP_I2C_REQ_BUS_CMD = 0x64 <<
12 PSP_DYNAMIC_BOOST_GET_NONCE, 11 PSP_DYNAMIC_BOOST_GET_NONCE,
13 PSP_DYNAMIC_BOOST_SET_UID, 12 PSP_DYNAMIC_BOOST_SET_UID,
14 PSP_DYNAMIC_BOOST_GET_PARAMETER, 13 PSP_DYNAMIC_BOOST_GET_PARAMETER,
15 PSP_DYNAMIC_BOOST_SET_PARAMETER, 14 PSP_DYNAMIC_BOOST_SET_PARAMETER,
16 }; 15 };
17 16
18 struct psp_req_buffer_hdr { 17 struct psp_req_buffer_hdr {
19 u32 payload_size; 18 u32 payload_size;
20 u32 status; 19 u32 status;
21 } __packed; 20 } __packed;
22 21
23 struct psp_request { 22 struct psp_request {
24 struct psp_req_buffer_hdr header; 23 struct psp_req_buffer_hdr header;
25 void *buf; 24 void *buf;
26 } __packed; 25 } __packed;
27 26
28 /** 27 /**
29 * psp_send_platform_access_msg() - Send a mes 28 * psp_send_platform_access_msg() - Send a message to control platform features
30 * 29 *
31 * This function is intended to be used by dri 30 * This function is intended to be used by drivers outside of ccp to communicate
32 * with the platform. 31 * with the platform.
33 * 32 *
34 * Returns: 33 * Returns:
35 * 0: success 34 * 0: success
36 * -%EBUSY: mailbox in recovery or in use 35 * -%EBUSY: mailbox in recovery or in use
37 * -%ENODEV: driver not bound with PSP dev 36 * -%ENODEV: driver not bound with PSP device
38 * -%ETIMEDOUT: request timed out 37 * -%ETIMEDOUT: request timed out
39 * -%EIO: unknown error (see kernel log 38 * -%EIO: unknown error (see kernel log)
40 */ 39 */
41 int psp_send_platform_access_msg(enum psp_plat 40 int psp_send_platform_access_msg(enum psp_platform_access_msg, struct psp_request *req);
42 41
43 /** 42 /**
44 * psp_ring_platform_doorbell() - Ring platfor 43 * psp_ring_platform_doorbell() - Ring platform doorbell
45 * 44 *
46 * This function is intended to be used by dri 45 * This function is intended to be used by drivers outside of ccp to ring the
47 * platform doorbell with a message. 46 * platform doorbell with a message.
48 * 47 *
49 * Returns: 48 * Returns:
50 * 0: success 49 * 0: success
51 * -%EBUSY: mailbox in recovery or in use 50 * -%EBUSY: mailbox in recovery or in use
52 * -%ENODEV: driver not bound with PSP dev 51 * -%ENODEV: driver not bound with PSP device
53 * -%ETIMEDOUT: request timed out 52 * -%ETIMEDOUT: request timed out
54 * -%EIO: error will be stored in resul 53 * -%EIO: error will be stored in result argument
55 */ 54 */
56 int psp_ring_platform_doorbell(int msg, u32 *r 55 int psp_ring_platform_doorbell(int msg, u32 *result);
57 56
58 /** 57 /**
59 * psp_check_platform_access_status() - Checks 58 * psp_check_platform_access_status() - Checks whether platform features is ready
60 * 59 *
61 * This function is intended to be used by dri 60 * This function is intended to be used by drivers outside of ccp to determine
62 * if platform features has initialized. 61 * if platform features has initialized.
63 * 62 *
64 * Returns: 63 * Returns:
65 * 0 platform features is ready 64 * 0 platform features is ready
66 * -%ENODEV platform features is not ready o 65 * -%ENODEV platform features is not ready or present
67 */ 66 */
68 int psp_check_platform_access_status(void); 67 int psp_check_platform_access_status(void);
69 68
70 #endif /* __PSP_PLATFORM_ACCESS_H */ 69 #endif /* __PSP_PLATFORM_ACCESS_H */
71 70
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