| Jamie Iles | af75655 | 2011-07-25 17:36:42 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011 Picochip Ltd., Jamie Iles |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * Derived from arch/arm/mach-davinci/include/mach/debug-macro.S to use 32-bit |
| 9 | * accesses to the 8250. |
| 10 | */ |
| 11 | #include <linux/serial_reg.h> |
| Jamie Iles | af75655 | 2011-07-25 17:36:42 +0100 | [diff] [blame] | 12 | |
| 13 | #define UART_SHIFT 2 |
| Rob Herring | 59bba2a | 2012-09-06 14:14:46 -0500 | [diff] [blame] | 14 | #define PICOXCELL_UART1_BASE 0x80230000 |
| 15 | #define PHYS_TO_IO(x) (((x) & 0x00ffffff) | 0xfe000000) |
| Jamie Iles | af75655 | 2011-07-25 17:36:42 +0100 | [diff] [blame] | 16 | |
| Jamie Iles | 0836b5cd | 2011-11-04 01:13:20 +0000 | [diff] [blame] | 17 | .macro addruart, rp, rv, tmp |
| Jamie Iles | af75655 | 2011-07-25 17:36:42 +0100 | [diff] [blame] | 18 | ldr \rv, =PHYS_TO_IO(PICOXCELL_UART1_BASE) |
| 19 | ldr \rp, =PICOXCELL_UART1_BASE |
| 20 | .endm |
| 21 | |
| 22 | .macro senduart,rd,rx |
| 23 | str \rd, [\rx, #UART_TX << UART_SHIFT] |
| 24 | .endm |
| 25 | |
| 26 | .macro busyuart,rd,rx |
| 27 | 1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT] |
| 28 | and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE |
| 29 | teq \rd, #UART_LSR_TEMT | UART_LSR_THRE |
| 30 | bne 1002b |
| 31 | .endm |
| 32 | |
| 33 | /* The UART's don't have any flow control IO's wired up. */ |
| 34 | .macro waituart,rd,rx |
| 35 | .endm |