diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/smdk2410/console/uart.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/smdk2410/console/uart.c | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/c/src/lib/libbsp/arm/smdk2410/console/uart.c b/c/src/lib/libbsp/arm/smdk2410/console/uart.c deleted file mode 100644 index 06adecf239..0000000000 --- a/c/src/lib/libbsp/arm/smdk2410/console/uart.c +++ /dev/null @@ -1,242 +0,0 @@ -/* - * console driver for S3C2400 UARTs - * - * This driver uses the shared console driver in - * ...../libbsp/shared/console.c - * - * If you want the driver to be interrupt driven, you - * need to write the ISR, and in the ISR insert the - * chars into termios's queue. - * - * Copyright (c) 2004 Cogent Computer Systems - * Written by Jay Monkman <jtm@lopingdog.com> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. -*/ -#include <bsp.h> /* Must be before libio.h */ -#include <rtems/libio.h> -#include <termios.h> -#include <rtems/bspIo.h> - -/* Put the CPU (or UART) specific header file #include here */ -#include <s3c24xx.h> -#include <libchip/serial.h> -#include <libchip/sersupp.h> - -/* How many serial ports? */ -#define NUM_DEVS 1 - -int uart_poll_read(int minor); - -int dbg_dly; - -/* static function prototypes */ -static int uart_first_open(int major, int minor, void *arg); -static int uart_last_close(int major, int minor, void *arg); -static int uart_read(int minor); -static ssize_t uart_write(int minor, const char *buf, size_t len); -static void uart_init(int minor); -static void uart_write_polled(int minor, char c); -static int uart_set_attributes(int minor, const struct termios *t); - -/* These are used by code in console.c */ -unsigned long Console_Configuration_Count = NUM_DEVS; - -/* Pointers to functions for handling the UART. */ -const console_fns uart_fns = -{ - libchip_serial_default_probe, - uart_first_open, - uart_last_close, - uart_read, - uart_write, - uart_init, - uart_write_polled, /* not used in this driver */ - uart_set_attributes, - FALSE /* TRUE if interrupt driven, FALSE if not. */ -}; - -/* - * There's one item in array for each UART. - * - * Some of these fields are marked "NOT USED". They are not used - * by console.c, but may be used by drivers in libchip - * - */ -console_tbl Console_Configuration_Ports[] = { - { - "/dev/com0", /* sDeviceName */ - SERIAL_CUSTOM, /* deviceType */ - &uart_fns, /* pDeviceFns */ - NULL, /* deviceProbe */ - NULL, /* pDeviceFlow */ - 0, /* ulMargin - NOT USED */ - 0, /* ulHysteresis - NOT USED */ - NULL, /* pDeviceParams */ - 0, /* ulCtrlPort1 - NOT USED */ - 0, /* ulCtrlPort2 - NOT USED */ - 0, /* ulDataPort - NOT USED */ - NULL, /* getRegister - NOT USED */ - NULL, /* setRegister - NOT USED */ - NULL, /* getData - NOT USED */ - NULL, /* setData - NOT USED */ - 0, /* ulClock - NOT USED */ - 0 /* ulIntVector - NOT USED */ - } -}; - -/*********************************************************************/ -/* Functions called via termios callbacks (i.e. the ones in uart_fns */ -/*********************************************************************/ - -/* - * This is called the first time each device is opened. If the driver - * is interrupt driven, you should enable interrupts here. Otherwise, - * it's probably safe to do nothing. - * - * Since micromonitor already set up the UART, we do nothing. - */ -static int uart_first_open(int major, int minor, void *arg) -{ - return 0; -} - - -/* - * This is called the last time each device is closed. If the driver - * is interrupt driven, you should disable interrupts here. Otherwise, - * it's probably safe to do nothing. - */ -static int uart_last_close(int major, int minor, void *arg) -{ - return 0; -} - - -/* - * Read one character from UART. - * - * Return -1 if there's no data, otherwise return - * the character in lowest 8 bits of returned int. - */ -static int uart_read(int minor) -{ - char c; - - if (minor == 0) { - if (rUTRSTAT0 & 0x1) { - c = rURXH0 & 0xff; - return c; - } else { - return -1; - } - } else { - printk("Unknown console minor number: %d\n", minor); - return -1; - } - -} - - -/* - * Write buffer to UART - * - * return 1 on success, -1 on error - */ -static ssize_t uart_write(int minor, const char *buf, size_t len) -{ - int i; - - if (minor == 0) { - for (i = 0; i < len; i++) { - /* Wait for fifo to have room */ - while(!(rUTRSTAT0 & 0x2)) { - continue; - } - - rUTXH0 = (char) buf[i]; - } - } else { - printk("Unknown console minor number: %d\n", minor); - return -1; - } - - return 1; -} - - -/* Set up the UART. */ -static void uart_init(int minor) -{ - int i; - unsigned int reg = 0; - - /* enable UART0 */ - rCLKCON|=0x100; - - /* value is calculated so : (int)(PCLK/16./baudrate) -1 */ - reg = get_PCLK() / (16 * 115200) - 1; - - /* FIFO enable, Tx/Rx FIFO clear */ - rUFCON0 = 0x07; - rUMCON0 = 0x0; - /* Normal,No parity,1 stop,8 bit */ - rULCON0 = 0x3; - /* - * tx=level,rx=edge,disable timeout int.,enable rx error int., - * normal,interrupt or polling - */ - rUCON0 = 0x245; - rUBRDIV0 = reg; - - for (i = 0; i < 100; i++); - -} - -/* I'm not sure this is needed for the shared console driver. */ -static void uart_write_polled(int minor, char c) -{ - uart_write(minor, &c, 1); -} - -/* This is for setting baud rate, bits, etc. */ -static int uart_set_attributes(int minor, const struct termios *t) -{ - return 0; -} - -/***********************************************************************/ -/* - * The following functions are not used by TERMIOS, but other RTEMS - * functions use them instead. - */ -/***********************************************************************/ -/* - * Read from UART. This is used in the exit code, and can't - * rely on interrupts. -*/ -int uart_poll_read(int minor) -{ - return uart_read(minor); -} - - -/* - * Write a character to the console. This is used by printk() and - * maybe other low level functions. It should not use interrupts or any - * RTEMS system calls. It needs to be very simple - */ -static void _BSP_put_char( char c ) { - uart_write_polled(0, c); -} - -BSP_output_char_function_type BSP_output_char = _BSP_put_char; - -static int _BSP_get_char(void) -{ - return uart_poll_read(0); -} - -BSP_polling_getchar_function_type BSP_poll_char = _BSP_get_char; |