| Kevin Hilman | 7c6337e | 2007-04-30 19:37:19 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Debugging macro for DaVinci |
| 3 | * |
| 4 | * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com> |
| 5 | * |
| 6 | * 2007 (c) MontaVista Software, Inc. This file is licensed under |
| 7 | * the terms of the GNU General Public License version 2. This program |
| 8 | * is licensed "as is" without any warranty of any kind, whether express |
| 9 | * or implied. |
| 10 | */ |
| 11 | |
| Chaithrika U S | 17eb157 | 2009-01-19 14:13:05 +0530 | [diff] [blame^] | 12 | /* Modifications |
| 13 | * Jan 2009 Chaithrika U S Added senduart, busyuart, waituart |
| 14 | * macros, based on debug-8250.S file |
| 15 | * but using 32-bit accesses required for |
| 16 | * some davinci devices. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/serial_reg.h> |
| 20 | #define UART_SHIFT 2 |
| 21 | |
| Kevin Hilman | 7c6337e | 2007-04-30 19:37:19 +0100 | [diff] [blame] | 22 | .macro addruart, rx |
| 23 | mrc p15, 0, \rx, c1, c0 |
| 24 | tst \rx, #1 @ MMU enabled? |
| 25 | moveq \rx, #0x01000000 @ physical base address |
| 26 | movne \rx, #0xfe000000 @ virtual base |
| 27 | orr \rx, \rx, #0x00c20000 @ UART 0 |
| 28 | .endm |
| 29 | |
| Chaithrika U S | 17eb157 | 2009-01-19 14:13:05 +0530 | [diff] [blame^] | 30 | .macro senduart,rd,rx |
| 31 | str \rd, [\rx, #UART_TX << UART_SHIFT] |
| 32 | .endm |
| 33 | |
| 34 | .macro busyuart,rd,rx |
| 35 | 1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT] |
| 36 | and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE |
| 37 | teq \rd, #UART_LSR_TEMT | UART_LSR_THRE |
| 38 | bne 1002b |
| 39 | .endm |
| 40 | |
| 41 | .macro waituart,rd,rx |
| 42 | #ifdef FLOW_CONTROL |
| 43 | 1001: ldr \rd, [\rx, #UART_MSR << UART_SHIFT] |
| 44 | tst \rd, #UART_MSR_CTS |
| 45 | beq 1001b |
| 46 | #endif |
| 47 | .endm |
| 48 | |