diff options
Diffstat (limited to 'c/src/lib/libbsp/sparc/leon3/console/console.c')
| -rw-r--r-- | c/src/lib/libbsp/sparc/leon3/console/console.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/sparc/leon3/console/console.c b/c/src/lib/libbsp/sparc/leon3/console/console.c new file mode 100644 index 0000000000..41dd26c449 --- /dev/null +++ b/c/src/lib/libbsp/sparc/leon3/console/console.c @@ -0,0 +1,232 @@ +/* + * This file contains the TTY driver for the serial ports on the LEON. + * + * This driver uses the termios pseudo driver. + * + * COPYRIGHT (c) 1989-1998. + * On-Line Applications Research Corporation (OAR). + * + * Modified for LEON3 BSP. + * COPYRIGHT (c) 2004. + * Gaisler Research. + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#include <bsp.h> +#include <rtems/libio.h> +#include <stdlib.h> +#include <assert.h> +#include <rtems/bspIo.h> + +/* + * Should we use a polled or interrupt drived console? + * + * NOTE: This is defined in the custom/leon.cfg file. + * + * WARNING: In sis 1.6, it did not appear that the UART interrupts + * worked in a desirable fashion. Immediately upon writing + * a character into the TX buffer, an interrupt was generated. + * This did not allow enough time for the program to put more + * characters in the buffer. So every character resulted in + * "priming" the transmitter. This effectively results in + * in a polled console with a useless interrupt per character + * on output. It is reasonable to assume that input does not + * share this problem although it was not investigated. + * + */ + +/* + * console_outbyte_polled + * + * This routine transmits a character using polling. + */ + +void console_outbyte_polled( + int port, + char ch +); + +/* body is in debugputs.c */ + +/* + * console_inbyte_nonblocking + * + * This routine polls for a character. + */ + +int console_inbyte_nonblocking( int port ); + +/* body is in debugputs.c */ + + +/* + * Console Termios Support Entry Points + * + */ + +int console_write_support (int minor, const char *buf, int len) +{ + int nwrite = 0; + + while (nwrite < len) { + console_outbyte_polled( minor, *buf++ ); + nwrite++; + } + return nwrite; +} + + +/* + * Console Device Driver Entry Points + * + */ + +volatile LEON3_UART_Regs_Map *LEON3_Console_Uart[LEON3_APBUARTS]; + +rtems_device_driver console_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg +) +{ + rtems_status_code status; + unsigned int iobar, conf; + int i, uarts; + char *console_name = "/dev/console_a"; + + + rtems_termios_initialize(); + + /* Find UARTs */ + + i = 0; uarts = 0; + while (i < amba_conf.apbslv.devnr) + { + conf = amba_get_confword(amba_conf.apbslv, i, 0); + if ((amba_vendor(conf) == VENDOR_GAISLER) && (amba_device(conf) == GAISLER_APBUART)) + { + iobar = amba_apb_get_membar(amba_conf.apbslv, i); + LEON3_Console_Uart[uarts] = (volatile LEON3_UART_Regs_Map *) amba_iobar_start(amba_conf.apbmst, iobar); + uarts++; + } + i++; + } + + /* Register Device Names */ + + if (uarts) + { + status = rtems_io_register_name( "/dev/console", major, 0 ); + if (status != RTEMS_SUCCESSFUL) + rtems_fatal_error_occurred(status); + + for (i = 1; i < uarts; i++) + { + console_name[13]++; + status = rtems_io_register_name( console_name, major, i); + } + } + + + /* + * Initialize Hardware + */ + + for (i = 0; i < uarts; i++) + { + LEON3_Console_Uart[i]->ctrl |= LEON_REG_UART_CTRL_RE | LEON_REG_UART_CTRL_TE; + LEON3_Console_Uart[i]->status = 0; + } + + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver console_open( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + rtems_status_code sc; + + static const rtems_termios_callbacks pollCallbacks = { + NULL, /* firstOpen */ + NULL, /* lastClose */ + console_inbyte_nonblocking, /* pollRead */ + console_write_support, /* write */ + NULL, /* setAttributes */ + NULL, /* stopRemoteTx */ + NULL, /* startRemoteTx */ + 0 /* outputUsesInterrupts */ + }; + + + assert( minor <= LEON3_APBUARTS ); + if ( minor > LEON3_APBUARTS ) + return RTEMS_INVALID_NUMBER; + + sc = rtems_termios_open (major, minor, arg, &pollCallbacks); + + + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver console_close( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + return rtems_termios_close (arg); +} + +rtems_device_driver console_read( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + return rtems_termios_read (arg); +} + +rtems_device_driver console_write( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + return rtems_termios_write (arg); +} + +rtems_device_driver console_control( + rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + return rtems_termios_ioctl (arg); +} + +/* putchar/getchar for printk */ + +static void bsp_out_char(char c) +{ + console_outbyte_polled(0, c); +} + +BSP_output_char_function_type BSP_output_char = bsp_out_char; + +static char bsp_in_char(void) +{ + int tmp; + + while ((tmp = console_inbyte_nonblocking(0)) < 0); + return (char) tmp; +} + +BSP_polling_getchar_function_type BSP_poll_char = bsp_in_char; |