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