| /* |
| * Debugging macro for DaVinci |
| * |
| * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com> |
| * |
| * 2007 (c) MontaVista Software, Inc. This file is licensed under |
| * the terms of the GNU General Public License version 2. This program |
| * is licensed "as is" without any warranty of any kind, whether express |
| * or implied. |
| */ |
| |
| /* Modifications |
| * Jan 2009 Chaithrika U S Added senduart, busyuart, waituart |
| * macros, based on debug-8250.S file |
| * but using 32-bit accesses required for |
| * some davinci devices. |
| */ |
| |
| #include <linux/serial_reg.h> |
| |
| #include <mach/serial.h> |
| |
| #define UART_SHIFT 2 |
| |
| #if defined(CONFIG_DEBUG_DAVINCI_DMx_UART0) |
| #define UART_BASE DAVINCI_UART0_BASE |
| #elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART1) |
| #define UART_BASE DA8XX_UART1_BASE |
| #elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART2) |
| #define UART_BASE DA8XX_UART2_BASE |
| #elif defined(CONFIG_DEBUG_DAVINCI_TNETV107X_UART1) |
| #define UART_BASE TNETV107X_UART2_BASE |
| #define UART_VIRTBASE TNETV107X_UART2_VIRT |
| #else |
| #error "Select a specifc port for DEBUG_LL" |
| #endif |
| |
| #ifndef UART_VIRTBASE |
| #define UART_VIRTBASE IO_ADDRESS(UART_BASE) |
| #endif |
| |
| .macro addruart, rp, rv, tmp |
| ldr \rp, =UART_BASE |
| ldr \rv, =UART_VIRTBASE |
| .endm |
| |
| .macro senduart,rd,rx |
| str \rd, [\rx, #UART_TX << UART_SHIFT] |
| .endm |
| |
| .macro busyuart,rd,rx |
| 1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT] |
| and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE |
| teq \rd, #UART_LSR_TEMT | UART_LSR_THRE |
| bne 1002b |
| .endm |
| |
| .macro waituart,rd,rx |
| #ifdef FLOW_CONTROL |
| 1001: ldr \rd, [\rx, #UART_MSR << UART_SHIFT] |
| tst \rd, #UART_MSR_CTS |
| beq 1001b |
| #endif |
| .endm |
| |
