| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Broadcom BCM63xx low-level UART debug |
| 4 | * |
| 5 | * Copyright (C) 2014 Broadcom Corporation |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #include <linux/serial_bcm63xx.h> |
| 9 | |
| 10 | .macro addruart, rp, rv, tmp |
| 11 | ldr \rp, =CONFIG_DEBUG_UART_PHYS |
| 12 | ldr \rv, =CONFIG_DEBUG_UART_VIRT |
| 13 | .endm |
| 14 | |
| 15 | .macro senduart, rd, rx |
| 16 | /* word access do not work */ |
| 17 | strb \rd, [\rx, #UART_FIFO_REG] |
| 18 | .endm |
| 19 | |
| 20 | .macro waituart, rd, rx |
| 21 | 1001: ldr \rd, [\rx, #UART_IR_REG] |
| 22 | tst \rd, #(1 << UART_IR_TXEMPTY) |
| 23 | beq 1001b |
| 24 | .endm |
| 25 | |
| 26 | .macro busyuart, rd, rx |
| 27 | 1002: ldr \rd, [\rx, #UART_IR_REG] |
| 28 | tst \rd, #(1 << UART_IR_TXTRESH) |
| 29 | beq 1002b |
| 30 | .endm |