+++ /dev/null
-/*
- * (C) Copyright 2002
- * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <linux/compiler.h>
-#include <asm/arch/s3c24x0_cpu.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#ifdef CONFIG_SERIAL1
-#define UART_NR S3C24X0_UART0
-
-#elif defined(CONFIG_SERIAL2)
-#define UART_NR S3C24X0_UART1
-
-#elif defined(CONFIG_SERIAL3)
-#define UART_NR S3C24X0_UART2
-
-#else
-#error "Bad: you didn't configure serial ..."
-#endif
-
-#include <asm/io.h>
-#include <serial.h>
-
-/* Multi serial device functions */
-#define DECLARE_S3C_SERIAL_FUNCTIONS(port) \
- int s3serial##port##_init(void) \
- { \
- return serial_init_dev(port); \
- } \
- void s3serial##port##_setbrg(void) \
- { \
- serial_setbrg_dev(port); \
- } \
- int s3serial##port##_getc(void) \
- { \
- return serial_getc_dev(port); \
- } \
- int s3serial##port##_tstc(void) \
- { \
- return serial_tstc_dev(port); \
- } \
- void s3serial##port##_putc(const char c) \
- { \
- serial_putc_dev(port, c); \
- } \
- void s3serial##port##_puts(const char *s) \
- { \
- serial_puts_dev(port, s); \
- }
-
-#define INIT_S3C_SERIAL_STRUCTURE(port, __name) { \
- .name = __name, \
- .start = s3serial##port##_init, \
- .stop = NULL, \
- .setbrg = s3serial##port##_setbrg, \
- .getc = s3serial##port##_getc, \
- .tstc = s3serial##port##_tstc, \
- .putc = s3serial##port##_putc, \
- .puts = s3serial##port##_puts, \
-}
-
-static void _serial_setbrg(const int dev_index)
-{
- struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index);
- unsigned int reg = 0;
- int i;
-
- /* value is calculated so : (int)(PCLK/16./baudrate) -1 */
- reg = get_PCLK() / (16 * gd->baudrate) - 1;
-
- writel(reg, &uart->ubrdiv);
- for (i = 0; i < 100; i++)
- /* Delay */ ;
-}
-
-static inline void serial_setbrg_dev(unsigned int dev_index)
-{
- _serial_setbrg(dev_index);
-}
-
-/* Initialise the serial port. The settings are always 8 data bits, no parity,
- * 1 stop bit, no start bits.
- */
-static int serial_init_dev(const int dev_index)
-{
- struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index);
-
- /* FIFO enable, Tx/Rx FIFO clear */
- writel(0x07, &uart->ufcon);
- writel(0x0, &uart->umcon);
-
- /* Normal,No parity,1 stop,8 bit */
- writel(0x3, &uart->ulcon);
- /*
- * tx=level,rx=edge,disable timeout int.,enable rx error int.,
- * normal,interrupt or polling
- */
- writel(0x245, &uart->ucon);
-
- _serial_setbrg(dev_index);
-
- return (0);
-}
-
-/*
- * Read a single byte from the serial port. Returns 1 on success, 0
- * otherwise. When the function is succesfull, the character read is
- * written into its argument c.
- */
-static int _serial_getc(const int dev_index)
-{
- struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index);
-
- while (!(readl(&uart->utrstat) & 0x1))
- /* wait for character to arrive */ ;
-
- return readb(&uart->urxh) & 0xff;
-}
-
-static inline int serial_getc_dev(unsigned int dev_index)
-{
- return _serial_getc(dev_index);
-}
-
-/*
- * Output a single byte to the serial port.
- */
-static void _serial_putc(const char c, const int dev_index)
-{
- struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index);
-
- /* If \n, also do \r */
- if (c == '\n')
- serial_putc('\r');
-
- while (!(readl(&uart->utrstat) & 0x2))
- /* wait for room in the tx FIFO */ ;
-
- writeb(c, &uart->utxh);
-}
-
-static inline void serial_putc_dev(unsigned int dev_index, const char c)
-{
- _serial_putc(c, dev_index);
-}
-
-/*
- * Test whether a character is in the RX buffer
- */
-static int _serial_tstc(const int dev_index)
-{
- struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index);
-
- return readl(&uart->utrstat) & 0x1;
-}
-
-static inline int serial_tstc_dev(unsigned int dev_index)
-{
- return _serial_tstc(dev_index);
-}
-
-static void _serial_puts(const char *s, const int dev_index)
-{
- while (*s) {
- _serial_putc(*s++, dev_index);
- }
-}
-
-static inline void serial_puts_dev(int dev_index, const char *s)
-{
- _serial_puts(s, dev_index);
-}
-
-DECLARE_S3C_SERIAL_FUNCTIONS(0);
-struct serial_device s3c24xx_serial0_device =
-INIT_S3C_SERIAL_STRUCTURE(0, "s3ser0");
-DECLARE_S3C_SERIAL_FUNCTIONS(1);
-struct serial_device s3c24xx_serial1_device =
-INIT_S3C_SERIAL_STRUCTURE(1, "s3ser1");
-DECLARE_S3C_SERIAL_FUNCTIONS(2);
-struct serial_device s3c24xx_serial2_device =
-INIT_S3C_SERIAL_STRUCTURE(2, "s3ser2");
-
-__weak struct serial_device *default_serial_console(void)
-{
-#if defined(CONFIG_SERIAL1)
- return &s3c24xx_serial0_device;
-#elif defined(CONFIG_SERIAL2)
- return &s3c24xx_serial1_device;
-#elif defined(CONFIG_SERIAL3)
- return &s3c24xx_serial2_device;
-#else
-#error "CONFIG_SERIAL? missing."
-#endif
-}
-
-void s3c24xx_serial_initialize(void)
-{
- serial_register(&s3c24xx_serial0_device);
- serial_register(&s3c24xx_serial1_device);
- serial_register(&s3c24xx_serial2_device);
-}
projects / u-boot.git / commitdiff
