linux/drivers/fsi/fsi-scom.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * SCOM FSI Client device driver
 *
 * Copyright (C) IBM Corporation 2016
 */

#include <linux/fsi.h>
#include <linux/module.h>
#include <linux/cdev.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/mod_devicetable.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <linux/list.h>

#include <uapi/linux/fsi.h>

#define FSI_ENGID_SCOM …

/* SCOM engine register set */
#define SCOM_DATA0_REG …
#define SCOM_DATA1_REG …
#define SCOM_CMD_REG …
#define SCOM_FSI2PIB_RESET_REG …
#define SCOM_STATUS_REG …
#define SCOM_PIB_RESET_REG …

/* Command register */
#define SCOM_WRITE_CMD …
#define SCOM_READ_CMD …

/* Status register bits */
#define SCOM_STATUS_ERR_SUMMARY …
#define SCOM_STATUS_PROTECTION …
#define SCOM_STATUS_PARITY …
#define SCOM_STATUS_PIB_ABORT …
#define SCOM_STATUS_PIB_RESP_MASK …
#define SCOM_STATUS_PIB_RESP_SHIFT …

#define SCOM_STATUS_FSI2PIB_ERROR …
#define SCOM_STATUS_ANY_ERR …
/* SCOM address encodings */
#define XSCOM_ADDR_IND_FLAG …
#define XSCOM_ADDR_INF_FORM1 …

/* SCOM indirect stuff */
#define XSCOM_ADDR_DIRECT_PART …
#define XSCOM_ADDR_INDIRECT_PART …
#define XSCOM_DATA_IND_READ …
#define XSCOM_DATA_IND_COMPLETE …
#define XSCOM_DATA_IND_ERR_MASK …
#define XSCOM_DATA_IND_ERR_SHIFT …
#define XSCOM_DATA_IND_DATA …
#define XSCOM_DATA_IND_FORM1_DATA …
#define XSCOM_ADDR_FORM1_LOW …
#define XSCOM_ADDR_FORM1_HI …
#define XSCOM_ADDR_FORM1_HI_SHIFT …

/* Retries */
#define SCOM_MAX_IND_RETRIES …

struct scom_device { … };

static int __put_scom(struct scom_device *scom_dev, uint64_t value,
		      uint32_t addr, uint32_t *status)
{ … }

static int __get_scom(struct scom_device *scom_dev, uint64_t *value,
		      uint32_t addr, uint32_t *status)
{ … }

static int put_indirect_scom_form0(struct scom_device *scom, uint64_t value,
				   uint64_t addr, uint32_t *status)
{ … }

static int put_indirect_scom_form1(struct scom_device *scom, uint64_t value,
				   uint64_t addr, uint32_t *status)
{ … }

static int get_indirect_scom_form0(struct scom_device *scom, uint64_t *value,
				   uint64_t addr, uint32_t *status)
{ … }

static int raw_put_scom(struct scom_device *scom, uint64_t value,
			uint64_t addr, uint32_t *status)
{ … }

static int raw_get_scom(struct scom_device *scom, uint64_t *value,
			uint64_t addr, uint32_t *status)
{ … }

static int handle_fsi2pib_status(struct scom_device *scom, uint32_t status)
{ … }

static int handle_pib_status(struct scom_device *scom, uint8_t status)
{ … }

static int put_scom(struct scom_device *scom, uint64_t value,
		    uint64_t addr)
{ … }

static int get_scom(struct scom_device *scom, uint64_t *value,
		    uint64_t addr)
{ … }

static ssize_t scom_read(struct file *filep, char __user *buf, size_t len,
			 loff_t *offset)
{ … }

static ssize_t scom_write(struct file *filep, const char __user *buf,
			  size_t len, loff_t *offset)
{ … }

static loff_t scom_llseek(struct file *file, loff_t offset, int whence)
{ … }

static void raw_convert_status(struct scom_access *acc, uint32_t status)
{ … }

static int scom_raw_read(struct scom_device *scom, void __user *argp)
{ … }

static int scom_raw_write(struct scom_device *scom, void __user *argp)
{ … }

static int scom_reset(struct scom_device *scom, void __user *argp)
{ … }

static int scom_check(struct scom_device *scom, void __user *argp)
{ … }

static long scom_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{ … }

static int scom_open(struct inode *inode, struct file *file)
{ … }

static const struct file_operations scom_fops = …;

static void scom_free(struct device *dev)
{ … }

static int scom_probe(struct device *dev)
{ … }

static int scom_remove(struct device *dev)
{ … }

static const struct of_device_id scom_of_ids[] = …;
MODULE_DEVICE_TABLE(of, scom_of_ids);

static const struct fsi_device_id scom_ids[] = …;

static struct fsi_driver scom_drv = …;

static int scom_init(void)
{ … }

static void scom_exit(void)
{ … }

module_init(…) …;
module_exit(scom_exit);
MODULE_LICENSE(…) …;