/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright 2005, 2007 Simtec Electronics
 *      http://armlinux.simtec.co.uk/
 *      Ben Dooks <ben@simtec.co.uk>
 */

#include <linux/serial_s3c.h>

/* The S5PV210/S5PC110 implementations are as belows. */

        .macro fifo_level_s5pv210 rd, rx
                ldr     \rd, [\rx, # S3C2410_UFSTAT]
ARM_BE8(rev \rd, \rd)
                and     \rd, \rd, #S5PV210_UFSTAT_TXMASK
        .endm

        .macro  fifo_full_s5pv210 rd, rx
                ldr     \rd, [\rx, # S3C2410_UFSTAT]
ARM_BE8(rev \rd, \rd)
                tst     \rd, #S5PV210_UFSTAT_TXFULL
        .endm

/* The S3C2440 implementations are used by default as they are the
 * most widely re-used */

        .macro fifo_level_s3c2440 rd, rx
                ldr     \rd, [\rx, # S3C2410_UFSTAT]
ARM_BE8(rev \rd, \rd)
                and     \rd, \rd, #S3C2440_UFSTAT_TXMASK
        .endm

#ifndef fifo_level
#define fifo_level fifo_level_s3c2440
#endif

        .macro  fifo_full_s3c2440 rd, rx
                ldr     \rd, [\rx, # S3C2410_UFSTAT]
ARM_BE8(rev \rd, \rd)
                tst     \rd, #S3C2440_UFSTAT_TXFULL
        .endm

#ifndef fifo_full
#define fifo_full fifo_full_s3c2440
#endif

        .macro  senduart,rd,rx
                strb    \rd, [\rx, # S3C2410_UTXH]
        .endm

        .macro  busyuart, rd, rx
                ldr     \rd, [\rx, # S3C2410_UFCON]
ARM_BE8(rev \rd, \rd)
                tst     \rd, #S3C2410_UFCON_FIFOMODE    @ fifo enabled?
                beq     1001f                           @
                @ FIFO enabled...
1003:
                fifo_full \rd, \rx
                bne     1003b
                b       1002f

1001:
                @ busy waiting for non fifo
                ldr     \rd, [\rx, # S3C2410_UTRSTAT]
ARM_BE8(rev \rd, \rd)
                tst     \rd, #S3C2410_UTRSTAT_TXFE
                beq     1001b

1002:           @ exit busyuart
        .endm

        .macro  waituartcts,rd,rx
        .endm

        .macro  waituarttxrdy,rd,rx
                ldr     \rd, [\rx, # S3C2410_UFCON]
ARM_BE8(rev \rd, \rd)
                tst     \rd, #S3C2410_UFCON_FIFOMODE    @ fifo enabled?
                beq     1001f                           @
                @ FIFO enabled...
1003:
                fifo_level \rd, \rx
                teq     \rd, #0
                bne     1003b
                b       1002f
1001:
                @ idle waiting for non fifo
                ldr     \rd, [\rx, # S3C2410_UTRSTAT]
ARM_BE8(rev \rd, \rd)
                tst     \rd, #S3C2410_UTRSTAT_TXFE
                beq     1001b

1002:           @ exit busyuart
        .endm