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https://github.com/zephyrproject-rtos/zephyr
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91cea2c9a6
() Rename nsim_uart.c to uart_nsim.c. This is to follow the driver naming convention. () Rename functions nsim_uart_*() to uart_nsim_*(), following driver naming convention. () UART ports initialization is moved into the driver itself. All the init code in platform config files is removed. () Adds (many) Kconfig options. These don't have to be defined in each platform's board.h anymore. Change-Id: If015f39a6f6b4fcc65625e6e5f973b4469202f54 Signed-off-by: Daniel Leung <daniel.leung@intel.com>
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/*
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* Copyright (c) 2014-2015, Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <nanokernel.h>
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#include <arch/cpu.h>
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#include <sections.h>
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#include <misc/__assert.h>
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#include <stdint.h>
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#include <misc/util.h>
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#include <string.h>
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#include <board.h>
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#include <init.h>
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#include <uart.h>
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#define NSIM_UART_DATA 0
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#define NSIM_UART_STATUS 1
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#define DEV_CFG(dev) \
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((struct uart_device_config * const)(dev)->config->config_info)
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#define DATA_REG(dev) (DEV_CFG(dev)->regs + NSIM_UART_DATA)
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#define STATUS_REG(dev) (DEV_CFG(dev)->regs + NSIM_UART_STATUS)
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#define TXEMPTY 0x80 /* Transmit FIFO empty and next character can be sent */
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static struct uart_driver_api uart_nsim_driver_api;
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/**
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* @brief Initialize fake serial port
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*
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* @param dev UART device struct (of type struct uart_device_config)
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*
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* @return DEV_OK
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*/
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static int uart_nsim_init(struct device *dev)
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{
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ARG_UNUSED(dev);
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return DEV_OK;
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}
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/*
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* @brief Output a character to serial port
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*
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* @param dev UART device struct (of type struct uart_device_config)
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* @param c character to output
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*/
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unsigned char uart_nsim_poll_out(struct device *dev, unsigned char c)
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{
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/* wait for transmitter to ready to accept a character */
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while ((_arc_v2_aux_reg_read(STATUS_REG(dev)) & TXEMPTY) == 0)
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;
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_arc_v2_aux_reg_write(DATA_REG(dev), c);
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return c;
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}
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static int uart_nsim_poll_in(struct device *dev, unsigned char *c)
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{
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return -DEV_INVALID_OP;
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}
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static struct uart_driver_api uart_nsim_driver_api = {
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.poll_out = uart_nsim_poll_out,
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.poll_in = uart_nsim_poll_in,
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};
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static struct uart_device_config uart_nsim_dev_cfg_0 = {
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.regs = CONFIG_UART_NSIM_PORT_0_BASE_ADDR,
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};
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DECLARE_DEVICE_INIT_CONFIG(uart_nsim0,
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CONFIG_UART_NSIM_PORT_0_NAME,
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&uart_nsim_init,
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&uart_nsim_dev_cfg_0);
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SYS_DEFINE_DEVICE(uart_nsim0, NULL, PRIMARY,
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
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