root/arch/arm/include/debug/samsung.S

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright 2005, 2007 Simtec Electronics
   4  *      http://armlinux.simtec.co.uk/
   5  *      Ben Dooks <ben@simtec.co.uk>
   6  */
   7 
   8 #include <linux/serial_s3c.h>
   9 
  10 /* The S5PV210/S5PC110 implementations are as belows. */
  11 
  12         .macro fifo_level_s5pv210 rd, rx
  13                 ldr     \rd, [\rx, # S3C2410_UFSTAT]
  14 ARM_BE8(rev \rd, \rd)
  15                 and     \rd, \rd, #S5PV210_UFSTAT_TXMASK
  16         .endm
  17 
  18         .macro  fifo_full_s5pv210 rd, rx
  19                 ldr     \rd, [\rx, # S3C2410_UFSTAT]
  20 ARM_BE8(rev \rd, \rd)
  21                 tst     \rd, #S5PV210_UFSTAT_TXFULL
  22         .endm
  23 
  24 /* The S3C2440 implementations are used by default as they are the
  25  * most widely re-used */
  26 
  27         .macro fifo_level_s3c2440 rd, rx
  28                 ldr     \rd, [\rx, # S3C2410_UFSTAT]
  29 ARM_BE8(rev \rd, \rd)
  30                 and     \rd, \rd, #S3C2440_UFSTAT_TXMASK
  31         .endm
  32 
  33 #ifndef fifo_level
  34 #define fifo_level fifo_level_s3c2440
  35 #endif
  36 
  37         .macro  fifo_full_s3c2440 rd, rx
  38                 ldr     \rd, [\rx, # S3C2410_UFSTAT]
  39 ARM_BE8(rev \rd, \rd)
  40                 tst     \rd, #S3C2440_UFSTAT_TXFULL
  41         .endm
  42 
  43 #ifndef fifo_full
  44 #define fifo_full fifo_full_s3c2440
  45 #endif
  46 
  47         .macro  senduart,rd,rx
  48                 strb    \rd, [\rx, # S3C2410_UTXH]
  49         .endm
  50 
  51         .macro  busyuart, rd, rx
  52                 ldr     \rd, [\rx, # S3C2410_UFCON]
  53 ARM_BE8(rev \rd, \rd)
  54                 tst     \rd, #S3C2410_UFCON_FIFOMODE    @ fifo enabled?
  55                 beq     1001f                           @
  56                 @ FIFO enabled...
  57 1003:
  58                 fifo_full \rd, \rx
  59                 bne     1003b
  60                 b       1002f
  61 
  62 1001:
  63                 @ busy waiting for non fifo
  64                 ldr     \rd, [\rx, # S3C2410_UTRSTAT]
  65 ARM_BE8(rev \rd, \rd)
  66                 tst     \rd, #S3C2410_UTRSTAT_TXFE
  67                 beq     1001b
  68 
  69 1002:           @ exit busyuart
  70         .endm
  71 
  72         .macro  waituart,rd,rx
  73                 ldr     \rd, [\rx, # S3C2410_UFCON]
  74 ARM_BE8(rev \rd, \rd)
  75                 tst     \rd, #S3C2410_UFCON_FIFOMODE    @ fifo enabled?
  76                 beq     1001f                           @
  77                 @ FIFO enabled...
  78 1003:
  79                 fifo_level \rd, \rx
  80                 teq     \rd, #0
  81                 bne     1003b
  82                 b       1002f
  83 1001:
  84                 @ idle waiting for non fifo
  85                 ldr     \rd, [\rx, # S3C2410_UTRSTAT]
  86 ARM_BE8(rev \rd, \rd)
  87                 tst     \rd, #S3C2410_UTRSTAT_TXFE
  88                 beq     1001b
  89 
  90 1002:           @ exit busyuart
  91         .endm