68 lines
1.7 KiB
ArmAsm
68 lines
1.7 KiB
ArmAsm
/*
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* Debugging macro for DaVinci
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*
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* Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
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*
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* 2007 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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/* Modifications
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* Jan 2009 Chaithrika U S Added senduart, busyuart, waituart
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* macros, based on debug-8250.S file
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* but using 32-bit accesses required for
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* some davinci devices.
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*/
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#include <linux/serial_reg.h>
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#include <mach/serial.h>
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#define UART_SHIFT 2
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#if defined(CONFIG_DEBUG_DAVINCI_DMx_UART0)
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#define UART_BASE DAVINCI_UART0_BASE
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#elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART0)
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#define UART_BASE DA8XX_UART0_BASE
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#elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART1)
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#define UART_BASE DA8XX_UART1_BASE
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#elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART2)
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#define UART_BASE DA8XX_UART2_BASE
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#elif defined(CONFIG_DEBUG_DAVINCI_TNETV107X_UART1)
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#define UART_BASE TNETV107X_UART2_BASE
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#define UART_VIRTBASE TNETV107X_UART2_VIRT
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#else
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#error "Select a specifc port for DEBUG_LL"
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#endif
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#ifndef UART_VIRTBASE
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#define UART_VIRTBASE IO_ADDRESS(UART_BASE)
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#endif
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.macro addruart, rp, rv, tmp
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ldr \rp, =UART_BASE
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ldr \rv, =UART_VIRTBASE
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.endm
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.macro senduart,rd,rx
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str \rd, [\rx, #UART_TX << UART_SHIFT]
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.endm
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.macro busyuart,rd,rx
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1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT]
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and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
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teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
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bne 1002b
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.endm
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.macro waituart,rd,rx
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#ifdef FLOW_CONTROL
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1001: ldr \rd, [\rx, #UART_MSR << UART_SHIFT]
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tst \rd, #UART_MSR_CTS
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beq 1001b
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#endif
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.endm
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