17ccc4f4eSMario Limonciello /* SPDX-License-Identifier: GPL-2.0-only */ 27ccc4f4eSMario Limonciello 37ccc4f4eSMario Limonciello #ifndef __PSP_PLATFORM_ACCESS_H 47ccc4f4eSMario Limonciello #define __PSP_PLATFORM_ACCESS_H 57ccc4f4eSMario Limonciello 67ccc4f4eSMario Limonciello #include <linux/psp.h> 77ccc4f4eSMario Limonciello 87ccc4f4eSMario Limonciello enum psp_platform_access_msg { 97ccc4f4eSMario Limonciello PSP_CMD_NONE = 0x0, 10440da737SMario Limonciello PSP_I2C_REQ_BUS_CMD = 0x64, 11c04cf9e1SMario Limonciello PSP_DYNAMIC_BOOST_GET_NONCE, 12d9408716SMario Limonciello PSP_DYNAMIC_BOOST_SET_UID, 13*e2cfe05eSMario Limonciello PSP_DYNAMIC_BOOST_GET_PARAMETER, 14*e2cfe05eSMario Limonciello PSP_DYNAMIC_BOOST_SET_PARAMETER, 157ccc4f4eSMario Limonciello }; 167ccc4f4eSMario Limonciello 177ccc4f4eSMario Limonciello struct psp_req_buffer_hdr { 187ccc4f4eSMario Limonciello u32 payload_size; 197ccc4f4eSMario Limonciello u32 status; 207ccc4f4eSMario Limonciello } __packed; 217ccc4f4eSMario Limonciello 227ccc4f4eSMario Limonciello struct psp_request { 237ccc4f4eSMario Limonciello struct psp_req_buffer_hdr header; 247ccc4f4eSMario Limonciello void *buf; 257ccc4f4eSMario Limonciello } __packed; 267ccc4f4eSMario Limonciello 277ccc4f4eSMario Limonciello /** 287ccc4f4eSMario Limonciello * psp_send_platform_access_msg() - Send a message to control platform features 297ccc4f4eSMario Limonciello * 307ccc4f4eSMario Limonciello * This function is intended to be used by drivers outside of ccp to communicate 317ccc4f4eSMario Limonciello * with the platform. 327ccc4f4eSMario Limonciello * 337ccc4f4eSMario Limonciello * Returns: 347ccc4f4eSMario Limonciello * 0: success 357ccc4f4eSMario Limonciello * -%EBUSY: mailbox in recovery or in use 367ccc4f4eSMario Limonciello * -%ENODEV: driver not bound with PSP device 377ccc4f4eSMario Limonciello * -%ETIMEDOUT: request timed out 387ccc4f4eSMario Limonciello * -%EIO: unknown error (see kernel log) 397ccc4f4eSMario Limonciello */ 407ccc4f4eSMario Limonciello int psp_send_platform_access_msg(enum psp_platform_access_msg, struct psp_request *req); 417ccc4f4eSMario Limonciello 427ccc4f4eSMario Limonciello /** 43d5812571SMario Limonciello * psp_ring_platform_doorbell() - Ring platform doorbell 44d5812571SMario Limonciello * 45d5812571SMario Limonciello * This function is intended to be used by drivers outside of ccp to ring the 46d5812571SMario Limonciello * platform doorbell with a message. 47d5812571SMario Limonciello * 48d5812571SMario Limonciello * Returns: 49d5812571SMario Limonciello * 0: success 50d5812571SMario Limonciello * -%EBUSY: mailbox in recovery or in use 51d5812571SMario Limonciello * -%ENODEV: driver not bound with PSP device 52d5812571SMario Limonciello * -%ETIMEDOUT: request timed out 53a19c61b0SMario Limonciello * -%EIO: error will be stored in result argument 54d5812571SMario Limonciello */ 55a19c61b0SMario Limonciello int psp_ring_platform_doorbell(int msg, u32 *result); 56d5812571SMario Limonciello 57d5812571SMario Limonciello /** 587ccc4f4eSMario Limonciello * psp_check_platform_access_status() - Checks whether platform features is ready 597ccc4f4eSMario Limonciello * 607ccc4f4eSMario Limonciello * This function is intended to be used by drivers outside of ccp to determine 617ccc4f4eSMario Limonciello * if platform features has initialized. 627ccc4f4eSMario Limonciello * 637ccc4f4eSMario Limonciello * Returns: 647ccc4f4eSMario Limonciello * 0 platform features is ready 657ccc4f4eSMario Limonciello * -%ENODEV platform features is not ready or present 667ccc4f4eSMario Limonciello */ 677ccc4f4eSMario Limonciello int psp_check_platform_access_status(void); 687ccc4f4eSMario Limonciello 697ccc4f4eSMario Limonciello #endif /* __PSP_PLATFORM_ACCESS_H */ 70