1 /* SPDX-License-Identifier: GPL-2.0-only */
3 #ifndef __PSP_PLATFORM_ACCESS_H
4 #define __PSP_PLATFORM_ACCESS_H
8 enum psp_platform_access_msg {
10 PSP_I2C_REQ_BUS_CMD = 0x64,
11 PSP_DYNAMIC_BOOST_GET_NONCE,
12 PSP_DYNAMIC_BOOST_SET_UID,
13 PSP_DYNAMIC_BOOST_GET_PARAMETER,
14 PSP_DYNAMIC_BOOST_SET_PARAMETER,
17 struct psp_req_buffer_hdr {
23 struct psp_req_buffer_hdr header;
28 * psp_send_platform_access_msg() - Send a message to control platform features
30 * This function is intended to be used by drivers outside of ccp to communicate
35 * -%EBUSY: mailbox in recovery or in use
36 * -%ENODEV: driver not bound with PSP device
37 * -%ETIMEDOUT: request timed out
38 * -%EIO: unknown error (see kernel log)
40 int psp_send_platform_access_msg(enum psp_platform_access_msg, struct psp_request *req);
43 * psp_ring_platform_doorbell() - Ring platform doorbell
45 * This function is intended to be used by drivers outside of ccp to ring the
46 * platform doorbell with a message.
50 * -%EBUSY: mailbox in recovery or in use
51 * -%ENODEV: driver not bound with PSP device
52 * -%ETIMEDOUT: request timed out
53 * -%EIO: error will be stored in result argument
55 int psp_ring_platform_doorbell(int msg, u32 *result);
58 * psp_check_platform_access_status() - Checks whether platform features is ready
60 * This function is intended to be used by drivers outside of ccp to determine
61 * if platform features has initialized.
64 * 0 platform features is ready
65 * -%ENODEV platform features is not ready or present
67 int psp_check_platform_access_status(void);
69 #endif /* __PSP_PLATFORM_ACCESS_H */