// SPDX-License-Identifier: GPL-2.0+ /* * ipmi_smic_sm.c * * The state-machine driver for an IPMI SMIC driver * * It started as a copy of Corey Minyard's driver for the KSC interface * and the kernel patch "mmcdev-patch-245" by HP * * modified by: Hannes Schulz <[email protected]> * [email protected] * * * Corey Minyard's driver for the KSC interface has the following * copyright notice: * Copyright 2002 MontaVista Software Inc. * * the kernel patch "mmcdev-patch-245" by HP has the following * copyright notice: * (c) Copyright 2001 Grant Grundler (c) Copyright * 2001 Hewlett-Packard Company */ #define DEBUG … #include <linux/kernel.h> /* For printk. */ #include <linux/string.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/ipmi_msgdefs.h> /* for completion codes */ #include "ipmi_si_sm.h" /* smic_debug is a bit-field * SMIC_DEBUG_ENABLE - turned on for now * SMIC_DEBUG_MSG - commands and their responses * SMIC_DEBUG_STATES - state machine */ #define SMIC_DEBUG_STATES … #define SMIC_DEBUG_MSG … #define SMIC_DEBUG_ENABLE … static int smic_debug = …; module_param(smic_debug, int, 0644); MODULE_PARM_DESC(…) …; enum smic_states { … }; #define MAX_SMIC_READ_SIZE … #define MAX_SMIC_WRITE_SIZE … #define SMIC_MAX_ERROR_RETRIES … /* Timeouts in microseconds. */ #define SMIC_RETRY_TIMEOUT … /* SMIC Flags Register Bits */ #define SMIC_RX_DATA_READY … #define SMIC_TX_DATA_READY … /* * SMIC_SMI and SMIC_EVM_DATA_AVAIL are only used by * a few systems, and then only by Systems Management * Interrupts, not by the OS. Always ignore these bits. * */ #define SMIC_SMI … #define SMIC_EVM_DATA_AVAIL … #define SMIC_SMS_DATA_AVAIL … #define SMIC_FLAG_BSY … /* SMIC Error Codes */ #define EC_NO_ERROR … #define EC_ABORTED … #define EC_ILLEGAL_CONTROL … #define EC_NO_RESPONSE … #define EC_ILLEGAL_COMMAND … #define EC_BUFFER_FULL … struct si_sm_data { … }; static unsigned int init_smic_data(struct si_sm_data *smic, struct si_sm_io *io) { … } static int start_smic_transaction(struct si_sm_data *smic, unsigned char *data, unsigned int size) { … } static int smic_get_result(struct si_sm_data *smic, unsigned char *data, unsigned int length) { … } static inline unsigned char read_smic_flags(struct si_sm_data *smic) { … } static inline unsigned char read_smic_status(struct si_sm_data *smic) { … } static inline unsigned char read_smic_data(struct si_sm_data *smic) { … } static inline void write_smic_flags(struct si_sm_data *smic, unsigned char flags) { … } static inline void write_smic_control(struct si_sm_data *smic, unsigned char control) { … } static inline void write_si_sm_data(struct si_sm_data *smic, unsigned char data) { … } static inline void start_error_recovery(struct si_sm_data *smic, char *reason) { … } static inline void write_next_byte(struct si_sm_data *smic) { … } static inline void read_next_byte(struct si_sm_data *smic) { … } /* SMIC Control/Status Code Components */ #define SMIC_GET_STATUS … #define SMIC_READY … #define SMIC_WR_START … #define SMIC_WR_NEXT … #define SMIC_WR_END … #define SMIC_RD_START … #define SMIC_RD_NEXT … #define SMIC_RD_END … #define SMIC_CODE_MASK … #define SMIC_CONTROL … #define SMIC_STATUS … #define SMIC_CS_MASK … #define SMIC_SMS … #define SMIC_SMM … #define SMIC_STREAM_MASK … /* SMIC Control Codes */ #define SMIC_CC_SMS_GET_STATUS … #define SMIC_CC_SMS_WR_START … #define SMIC_CC_SMS_WR_NEXT … #define SMIC_CC_SMS_WR_END … #define SMIC_CC_SMS_RD_START … #define SMIC_CC_SMS_RD_NEXT … #define SMIC_CC_SMS_RD_END … #define SMIC_CC_SMM_GET_STATUS … #define SMIC_CC_SMM_WR_START … #define SMIC_CC_SMM_WR_NEXT … #define SMIC_CC_SMM_WR_END … #define SMIC_CC_SMM_RD_START … #define SMIC_CC_SMM_RD_NEXT … #define SMIC_CC_SMM_RD_END … /* SMIC Status Codes */ #define SMIC_SC_SMS_READY … #define SMIC_SC_SMS_WR_START … #define SMIC_SC_SMS_WR_NEXT … #define SMIC_SC_SMS_WR_END … #define SMIC_SC_SMS_RD_START … #define SMIC_SC_SMS_RD_NEXT … #define SMIC_SC_SMS_RD_END … #define SMIC_SC_SMM_READY … #define SMIC_SC_SMM_WR_START … #define SMIC_SC_SMM_WR_NEXT … #define SMIC_SC_SMM_WR_END … #define SMIC_SC_SMM_RD_START … #define SMIC_SC_SMM_RD_NEXT … #define SMIC_SC_SMM_RD_END … /* these are the control/status codes we actually use SMIC_CC_SMS_GET_STATUS 0x40 SMIC_CC_SMS_WR_START 0x41 SMIC_CC_SMS_WR_NEXT 0x42 SMIC_CC_SMS_WR_END 0x43 SMIC_CC_SMS_RD_START 0x44 SMIC_CC_SMS_RD_NEXT 0x45 SMIC_CC_SMS_RD_END 0x46 SMIC_SC_SMS_READY 0xC0 SMIC_SC_SMS_WR_START 0xC1 SMIC_SC_SMS_WR_NEXT 0xC2 SMIC_SC_SMS_WR_END 0xC3 SMIC_SC_SMS_RD_START 0xC4 SMIC_SC_SMS_RD_NEXT 0xC5 SMIC_SC_SMS_RD_END 0xC6 */ static enum si_sm_result smic_event(struct si_sm_data *smic, long time) { … } static int smic_detect(struct si_sm_data *smic) { … } static void smic_cleanup(struct si_sm_data *kcs) { … } static int smic_size(void) { … } const struct si_sm_handlers smic_smi_handlers = …;
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