linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (c) 2015-2018, Intel Corporation.

 */

​

#define pr_fmt(fmt) "aspeed-kcs-bmc: " fmt

​

#include <linux/atomic.h>

#include <linux/errno.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/mfd/syscon.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/poll.h>

#include <linux/regmap.h>

#include <linux/sched.h>

#include <linux/slab.h>

#include <linux/timer.h>

​

#include "kcs_bmc.h"

​

​

#define DEVICE_NAME     "ast-kcs-bmc"

​

#define KCS_CHANNEL_MAX     4

​

/* mapped to lpc-bmc@0 IO space */

#define LPC_HICR0            0x000

#define     LPC_HICR0_LPC3E          BIT(7)

#define     LPC_HICR0_LPC2E          BIT(6)

#define     LPC_HICR0_LPC1E          BIT(5)

#define LPC_HICR2            0x008

#define     LPC_HICR2_IBFIF3         BIT(3)

#define     LPC_HICR2_IBFIF2         BIT(2)

#define     LPC_HICR2_IBFIF1         BIT(1)

#define LPC_HICR4            0x010

#define     LPC_HICR4_LADR12AS       BIT(7)

#define     LPC_HICR4_KCSENBL        BIT(2)

#define LPC_LADR3H           0x014

#define LPC_LADR3L           0x018

#define LPC_LADR12H          0x01C

#define LPC_LADR12L          0x020

#define LPC_IDR1             0x024

#define LPC_IDR2             0x028

#define LPC_IDR3             0x02C

#define LPC_ODR1             0x030

#define LPC_ODR2             0x034

#define LPC_ODR3             0x038

#define LPC_STR1             0x03C

#define LPC_STR2             0x040

#define LPC_STR3             0x044

​

/* mapped to lpc-host@80 IO space */

#define LPC_HICRB            0x080

#define     LPC_HICRB_IBFIF4         BIT(1)

#define     LPC_HICRB_LPC4E          BIT(0)

#define LPC_LADR4            0x090

#define LPC_IDR4             0x094

#define LPC_ODR4             0x098

#define LPC_STR4             0x09C

​

struct aspeed_kcs_bmc {

    struct regmap *map;

};

​

​

static u8 aspeed_kcs_inb(struct kcs_bmc *kcs_bmc, u32 reg)

{

    struct aspeed_kcs_bmc *priv = kcs_bmc_priv(kcs_bmc);

    u32 val = 0;

    int rc;

​

    rc = regmap_read(priv->map, reg, &val);

    WARN(rc != 0, "regmap_read() failed: %d\n", rc);

​

    return rc == 0 ? (u8) val : 0;

}

​

static void aspeed_kcs_outb(struct kcs_bmc *kcs_bmc, u32 reg, u8 data)

{

    struct aspeed_kcs_bmc *priv = kcs_bmc_priv(kcs_bmc);

    int rc;

​

    rc = regmap_write(priv->map, reg, data);

    WARN(rc != 0, "regmap_write() failed: %d\n", rc);

}

​

​

/*

 * AST_usrGuide_KCS.pdf