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nuttx/arch/arm/src/lpc214x/lpc214x_lowputc.S
Gregory Nutt 2aa85fd17e arch/arm, board/arm: Rename all up_* functions to arm_* 
Summary

The naming standard at https://cwiki.apache.org/confluence/display/NUTTX/Naming+FAQ requires that all MCU-private functions begin with the name of the architecture, not up_.

This PR addresses only these name changes for the ARM-private functions prototyped in arm_internal.h

This change to the files only modifies the name of called functions.  nxstyle fixes were made for all core architecture files.  However, there are well over 5000 additional complaints from MCU drivers and board logic that are unrelated to to this change but were affected by the name change.  It is not humanly possible to fix all of these.   I ask that this change be treated like other cosmetic changes that we have done which do not require full nxstyle compliance.

Impact

There should be not impact of this change (other that one step toward more consistent naming).
Testing

stm32f4discovery:netnsh
2020-05-01 18:28:13 +01:00

210 lines
7.1 KiB
ArmAsm
Raw Blame History

/**************************************************************************
* arch/arm/src/lpc214x/lpc214X_lowputc.S
*
* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
**************************************************************************/
/**************************************************************************
* Included Files
**************************************************************************/
#include <nuttx/config.h>
#include "chip.h"
#include "arm_arch.h"
#include "arm_internal.h"
#include "lpc214x_pinsel.h"
#include "lpc214x_uart.h"
/**************************************************************************
* Pre-processor Definitions
**************************************************************************/
#if defined(CONFIG_UART0_SERIAL_CONSOLE)
# define LPC214X_UART_BASE LPC214X_UART0_BASE
# define LPC214X_UART_PINSEL LPC214X_UART0_PINSEL
# define LPC214X_UART_PINMASK LPC214X_UART0_PINMASK
# define LPC214X_UART_BAUD CONFIG_UART0_BAUD
# define LPC214X_UART_BITS CONFIG_UART0_BITS
# define LPC214X_UART_PARITY CONFIG_UART0_PARITY
# define LPC214X_UART_2STOP CONFIG_UART0_2STOP
#elif defined(CONFIG_UART1_SERIAL_CONSOLE)
# define LPC214X_UART_BASE LPC214X_UART1_BASE
# define LPC214X_UART_PINSEL LPC214X_UART1_PINSEL
# define LPC214X_UART_PINMASK LPC214X_UART1_PINMASK
# define LPC214X_UART_BAUD CONFIG_UART1_BAUD
# define LPC214X_UART_BITS CONFIG_UART1_BITS
# define LPC214X_UART_PARITY CONFIG_UART1_PARITY
# define LPC214X_UART_2STOP CONFIG_UART1_2STOP
#else
# error "No CONFIG_UARTn_SERIAL_CONSOLE Setting"
#endif
#if LPC214X_UART_BITS == 5
# define LPC214X_LCR_CHAR LPC214X_LCR_CHAR_5
#elif LPC214X_UART_BITS == 6
# define LPC214X_LCR_CHAR LPC214X_LCR_CHAR_6
#elif LPC214X_UART_BITS == 7
# define LPC214X_LCR_CHAR LPC214X_LCR_CHAR_7
#elif LPC214X_UART_BITS == 8
# define LPC214X_LCR_CHAR LPC214X_LCR_CHAR_8
#else
# error "No CONFIG_UARTn_BITS Setting"
#endif
#if LPC214X_UART_PARITY == 0
# define LPC214X_LCR_PAR LPC214X_LCR_PAR_NONE
#elif LPC214X_UART_PARITY == 1
# define LPC214X_LCR_PAR LPC214X_LCR_PAR_ODD
#elif LPC214X_UART_PARITY == 2
# define LPC214X_LCR_PAR LPC214X_LCR_PAR_EVEN
#elif LPC214X_UART_PARITY == 3
# define LPC214X_LCR_PAR LPC214X_LCR_PAR_MARK
#elif LPC214X_UART_PARITY == 4
# define LPC214X_LCR_PAR LPC214X_LCR_PAR_SPACE
#else
# error "No CONFIG_UARTn_PARITY Setting"
#endif
#if LPC214X_UART_2STOP != 0
# define LPC214X_LCR_STOP LPC214X_LCR_STOP_2
#else
# define LPC214X_LCR_STOP LPC214X_LCR_STOP_1
#endif
#define LPC214X_LCR_VALUE (LPC214X_LCR_CHAR | LPC214X_LCR_PAR | LPC214X_LCR_STOP)
#define LPC214X_FCR_VALUE (LPC214X_FCR_FIFO_TRIG8 | LPC214X_FCR_TX_FIFO_RESET |\
LPC214X_FCR_RX_FIFO_RESET | LPC214X_FCR_FIFO_ENABLE)
/**************************************************************************
* Private Types
**************************************************************************/
/**************************************************************************
* Private Function Prototypes
**************************************************************************/
/**************************************************************************
* Public Data
**************************************************************************/
/**************************************************************************
* Private Data
**************************************************************************/
/**************************************************************************
* Private Functions
**************************************************************************/
/**************************************************************************
* Public Functions
**************************************************************************/
/**************************************************************************
* Name: arm_lowputc
**************************************************************************/
/* This assembly language version has the advantage that it can does not
* require a C stack and uses only r0-r1. Hence it can be used during
* early boot phases.
*/
.text
.global arm_lowputc
.type arm_lowputc, function
arm_lowputc:
/* On entry, r0 holds the character to be printed */
ldr r1, =LPC214X_UART_BASE
strb r0, [r1, #LPC214X_UART_THR_OFFSET]
/* Wait for the byte to be transferred */
1: ldr r0, [r1, #LPC214X_UART_LSR_OFFSET]
ands r0, #LPC214X_LSR_TEMT /* Transmitter empty */
beq 1b
/* And return */
mov pc, lr
.size arm_lowputc, . - arm_lowputc
/* This performs basic initialization of the UART. This can be called very
* early in initialization because it does not depend on having a stack. It
* modifies r0-r2 and r14.
*/
.text
.globl up_lowsetup
.type up_lowsetup, function
up_lowsetup:
/* Configure PINSEL0 */
ldr r0, =LPC214X_PINSEL0
ldr r1, [r0]
ldr r2, =~LPC214X_UART_PINMASK
and r1, r2
ldr r2, =LPC214X_UART_PINSEL
orr r1, r2
str r1, [r0]
/* Configure parity, data bits, stop bits and set DLAB=1 */
ldr r0, =LPC214X_UART_BASE
mov r1, #(LPC214X_LCR_VALUE | LPC214X_LCR_DLAB_ENABLE)
strb r1, [r0, #LPC214X_UART_LCR_OFFSET]
/* Set the BAUD divisor */
mov r1, #(UART_BAUD(LPC214X_UART_BAUD) >> 8)
strb r1, [r0, #LPC214X_UART_DLM_OFFSET]
mov r1, #(UART_BAUD(LPC214X_UART_BAUD) & 0xff)
strb r1, [r0, #LPC214X_UART_DLL_OFFSET]
/* Clear DLAB */
mov r1, #LPC214X_LCR_VALUE
strb r1, [r0, #LPC214X_UART_LCR_OFFSET]
/* Configure the FIFOs */
mov r1, #LPC214X_FCR_VALUE
strb r1, [r0, #LPC214X_UART_FCR_OFFSET]
/* And return */
mov pc, lr
.size up_lowsetup, . - up_lowsetup
.end
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