| 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> |
| Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 20 | |
| Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 21 | #include <mach/serial.h> |
| 22 | |
| Chaithrika U S | 17eb157 | 2009-01-19 14:13:05 +0530 | [diff] [blame] | 23 | #define UART_SHIFT 2 |
| 24 | |
| Uwe Kleine-König | 477099f | 2012-03-22 10:29:23 +0100 | [diff] [blame] | 25 | #if defined(CONFIG_DEBUG_DAVINCI_DMx_UART0) |
| 26 | #define UART_BASE DAVINCI_UART0_BASE |
| 27 | #elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART0) |
| 28 | #define UART_BASE DA8XX_UART0_BASE |
| 29 | #elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART1) |
| 30 | #define UART_BASE DA8XX_UART1_BASE |
| 31 | #elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART2) |
| 32 | #define UART_BASE DA8XX_UART2_BASE |
| 33 | #elif defined(CONFIG_DEBUG_DAVINCI_TNETV107X_UART1) |
| 34 | #define UART_BASE TNETV107X_UART2_BASE |
| 35 | #define UART_VIRTBASE TNETV107X_UART2_VIRT |
| 36 | #else |
| 37 | #error "Select a specifc port for DEBUG_LL" |
| 38 | #endif |
| 39 | |
| 40 | #ifndef UART_VIRTBASE |
| 41 | #define UART_VIRTBASE IO_ADDRESS(UART_BASE) |
| 42 | #endif |
| Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 43 | |
| Nicolas Pitre | 639da5e | 2011-08-31 22:55:46 -0400 | [diff] [blame] | 44 | .macro addruart, rp, rv, tmp |
| Uwe Kleine-König | 477099f | 2012-03-22 10:29:23 +0100 | [diff] [blame] | 45 | ldr \rp, =UART_BASE |
| 46 | ldr \rv, =UART_VIRTBASE |
| Kevin Hilman | 7c6337e | 2007-04-30 19:37:19 +0100 | [diff] [blame] | 47 | .endm |
| 48 | |
| Chaithrika U S | 17eb157 | 2009-01-19 14:13:05 +0530 | [diff] [blame] | 49 | .macro senduart,rd,rx |
| 50 | str \rd, [\rx, #UART_TX << UART_SHIFT] |
| 51 | .endm |
| 52 | |
| 53 | .macro busyuart,rd,rx |
| 54 | 1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT] |
| 55 | and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE |
| 56 | teq \rd, #UART_LSR_TEMT | UART_LSR_THRE |
| 57 | bne 1002b |
| 58 | .endm |
| 59 | |
| 60 | .macro waituart,rd,rx |
| 61 | #ifdef FLOW_CONTROL |
| 62 | 1001: ldr \rd, [\rx, #UART_MSR << UART_SHIFT] |
| 63 | tst \rd, #UART_MSR_CTS |
| 64 | beq 1001b |
| 65 | #endif |
| 66 | .endm |
| 67 | |