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/* SPDX-License-Identifier: GPL-2.0-only
*
* Copyright (C) 2020-21 Intel Corporation.
*/
#ifndef IOSM_IPC_MMIO_H
#define IOSM_IPC_MMIO_H
/* Minimal IOSM CP VERSION which has valid CP_CAPABILITIES field */
#define IOSM_CP_VERSION 0x0100UL
/* DL dir Aggregation support mask */
#define DL_AGGR BIT(9)
/* UL dir Aggregation support mask */
#define UL_AGGR BIT(8)
/* UL flow credit support mask */
#define UL_FLOW_CREDIT BIT(21)
/* Possible states of the IPC finite state machine. */
enum ipc_mem_device_ipc_state {
IPC_MEM_DEVICE_IPC_UNINIT,
IPC_MEM_DEVICE_IPC_INIT,
IPC_MEM_DEVICE_IPC_RUNNING,
IPC_MEM_DEVICE_IPC_RECOVERY,
IPC_MEM_DEVICE_IPC_ERROR,
IPC_MEM_DEVICE_IPC_DONT_CARE,
IPC_MEM_DEVICE_IPC_INVALID = -1
};
/* Boot ROM exit status. */
enum rom_exit_code {
IMEM_ROM_EXIT_OPEN_EXT = 0x01,
IMEM_ROM_EXIT_OPEN_MEM = 0x02,
IMEM_ROM_EXIT_CERT_EXT = 0x10,
IMEM_ROM_EXIT_CERT_MEM = 0x20,
IMEM_ROM_EXIT_FAIL = 0xFF
};
/* Boot stages */
enum ipc_mem_exec_stage {
IPC_MEM_EXEC_STAGE_RUN = 0x600DF00D,
IPC_MEM_EXEC_STAGE_CRASH = 0x8BADF00D,
IPC_MEM_EXEC_STAGE_CD_READY = 0xBADC0DED,
IPC_MEM_EXEC_STAGE_BOOT = 0xFEEDB007,
IPC_MEM_EXEC_STAGE_PSI = 0xFEEDBEEF,
IPC_MEM_EXEC_STAGE_EBL = 0xFEEDCAFE,
IPC_MEM_EXEC_STAGE_INVALID = 0xFFFFFFFF
};
/* mmio scratchpad info */
struct mmio_offset {
int exec_stage;
int chip_info;
int rom_exit_code;
int psi_address;
int psi_size;
int ipc_status;
int context_info;
int ap_win_base;
int ap_win_end;
int cp_version;
int cp_capability;
};
/**
* struct iosm_mmio - MMIO region mapped to the doorbell scratchpad.
* @base: Base address of MMIO region
* @dev: Pointer to device structure
* @offset: Start offset
* @context_info_addr: Physical base address of context info structure
* @chip_info_version: Version of chip info structure
* @chip_info_size: Size of chip info structure
* @mux_protocol: mux protocol
* @has_ul_flow_credit: Ul flow credit support
* @has_slp_no_prot: Device sleep no protocol support
* @has_mcr_support: Usage of mcr support
*/
struct iosm_mmio {
unsigned char __iomem *base;
struct device *dev;
struct mmio_offset offset;
phys_addr_t context_info_addr;
unsigned int chip_info_version;
unsigned int chip_info_size;
u32 mux_protocol;
u8 has_ul_flow_credit:1,
has_slp_no_prot:1,
has_mcr_support:1;
};
/**
* ipc_mmio_init - Allocate mmio instance data
* @mmio_addr: Mapped AP base address of the MMIO area.
* @dev: Pointer to device structure
*
* Returns: address of mmio instance data or NULL if fails.
*/
struct iosm_mmio *ipc_mmio_init(void __iomem *mmio_addr, struct device *dev);
/**
* ipc_mmio_set_psi_addr_and_size - Set start address and size of the
* primary system image (PSI) for the
* FW dowload.
* @ipc_mmio: Pointer to mmio instance
* @addr: PSI address
* @size: PSI immage size
*/
void ipc_mmio_set_psi_addr_and_size(struct iosm_mmio *ipc_mmio, dma_addr_t addr,
u32 size);
/**
* ipc_mmio_set_contex_info_addr - Stores the Context Info Address in
* MMIO instance to share it with CP during
* mmio_init.
* @ipc_mmio: Pointer to mmio instance
* @addr: 64-bit address of AP context information.
*/
void ipc_mmio_set_contex_info_addr(struct iosm_mmio *ipc_mmio,
phys_addr_t addr);
/**
* ipc_mmio_get_cp_version - Get the CP IPC version
* @ipc_mmio: Pointer to mmio instance
*
* Returns: version number on success and failure value on error.
*/
int ipc_mmio_get_cp_version(struct iosm_mmio *ipc_mmio);
/**
* ipc_mmio_get_rom_exit_code - Get exit code from CP boot rom download app
* @ipc_mmio: Pointer to mmio instance
*
* Returns: exit code from CP boot rom download APP
*/
enum rom_exit_code ipc_mmio_get_rom_exit_code(struct iosm_mmio *ipc_mmio);
/**
* ipc_mmio_get_exec_stage - Query CP execution stage
* @ipc_mmio: Pointer to mmio instance
*
* Returns: CP execution stage
*/
enum ipc_mem_exec_stage ipc_mmio_get_exec_stage(struct iosm_mmio *ipc_mmio);
/**
* ipc_mmio_get_ipc_state - Query CP IPC state
* @ipc_mmio: Pointer to mmio instance
*
* Returns: CP IPC state
*/
enum ipc_mem_device_ipc_state
ipc_mmio_get_ipc_state(struct iosm_mmio *ipc_mmio);
/**
* ipc_mmio_copy_chip_info - Copy size bytes of CP chip info structure
* into caller provided buffer
* @ipc_mmio: Pointer to mmio instance
* @dest: Pointer to caller provided buff
* @size: Number of bytes to copy
*/
void ipc_mmio_copy_chip_info(struct iosm_mmio *ipc_mmio, void *dest,
size_t size);
/**
* ipc_mmio_config - Write context info and AP memory range addresses.
* This needs to be called when CP is in
* IPC_MEM_DEVICE_IPC_INIT state
*
* @ipc_mmio: Pointer to mmio instance
*/
void ipc_mmio_config(struct iosm_mmio *ipc_mmio);
/**
* ipc_mmio_update_cp_capability - Read and update modem capability, from mmio
* capability offset
*
* @ipc_mmio: Pointer to mmio instance
*/
void ipc_mmio_update_cp_capability(struct iosm_mmio *ipc_mmio);
#endif
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