diff options
Diffstat (limited to 'common/console.c')
| -rw-r--r-- | common/console.c | 532 |
1 files changed, 532 insertions, 0 deletions
diff --git a/common/console.c b/common/console.c new file mode 100644 index 0000000..f99dfcc --- /dev/null +++ b/common/console.c @@ -0,0 +1,532 @@ +/* + * (C) Copyright 2000 + * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <stdarg.h> +#include <malloc.h> +#include <console.h> +#include <syscall.h> + +void **syscall_tbl; + +#ifdef CFG_CONSOLE_IS_IN_ENV +/* + * if overwrite_console returns 1, the stdin, stderr and stdout + * are switched to the serial port, else the settings in the + * environment are used + */ +#ifdef CFG_CONSOLE_OVERWRITE_ROUTINE +extern int overwrite_console (void); +#else +int overwrite_console (void) +{ + return (0); +} +#endif /* CFG_CONSOLE_OVERWRITE_ROUTINE */ + +#endif /* CFG_CONSOLE_IS_IN_ENV */ + +static int console_setfile (int file, device_t * dev) +{ + int error = 0; + + if (dev == NULL) + return -1; + + switch (file) { + case stdin: + case stdout: + case stderr: + /* Start new device */ + if (dev->start) { + error = dev->start (); + /* If it's not started dont use it */ + if (error < 0) + break; + } + + /* Assign the new device (leaving the existing one started) */ + stdio_devices[file] = dev; + + /* + * Update monitor functions + * (to use the console stuff by other applications) + */ + switch (file) { + case stdin: + syscall_tbl[SYSCALL_GETC] = dev->getc; + syscall_tbl[SYSCALL_TSTC] = dev->tstc; + break; + case stdout: + syscall_tbl[SYSCALL_PUTC] = dev->putc; + syscall_tbl[SYSCALL_PUTS] = dev->puts; + syscall_tbl[SYSCALL_PRINTF] = printf; + break; + } + break; + + default: /* Invalid file ID */ + error = -1; + } + return error; +} + +/** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/ + +void serial_printf (const char *fmt, ...) +{ + va_list args; + uint i; + char printbuffer[CFG_PBSIZE]; + + va_start (args, fmt); + + /* For this to work, printbuffer must be larger than + * anything we ever want to print. + */ + i = vsprintf (printbuffer, fmt, args); + va_end (args); + + serial_puts (printbuffer); +} + +int fgetc (int file) +{ + if (file < MAX_FILES) + return stdio_devices[file]->getc (); + + return -1; +} + +int ftstc (int file) +{ + if (file < MAX_FILES) + return stdio_devices[file]->tstc (); + + return -1; +} + +void fputc (int file, const char c) +{ + if (file < MAX_FILES) + stdio_devices[file]->putc (c); +} + +void fputs (int file, const char *s) +{ + if (file < MAX_FILES) + stdio_devices[file]->puts (s); +} + +void fprintf (int file, const char *fmt, ...) +{ + va_list args; + uint i; + char printbuffer[CFG_PBSIZE]; + + va_start (args, fmt); + + /* For this to work, printbuffer must be larger than + * anything we ever want to print. + */ + i = vsprintf (printbuffer, fmt, args); + va_end (args); + + /* Send to desired file */ + fputs (file, printbuffer); +} + +/** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/ + +int getc (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + if (gd->flags & GD_FLG_DEVINIT) { + /* Get from the standard input */ + return fgetc (stdin); + } + + /* Send directly to the handler */ + return serial_getc (); +} + +int tstc (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + if (gd->flags & GD_FLG_DEVINIT) { + /* Test the standard input */ + return ftstc (stdin); + } + + /* Send directly to the handler */ + return serial_tstc (); +} + +void putc (const char c) +{ + DECLARE_GLOBAL_DATA_PTR; + + if (gd->flags & GD_FLG_DEVINIT) { + /* Send to the standard output */ + fputc (stdout, c); + } else { + /* Send directly to the handler */ + serial_putc (c); + } +} + +void puts (const char *s) +{ + DECLARE_GLOBAL_DATA_PTR; + + if (gd->flags & GD_FLG_DEVINIT) { + /* Send to the standard output */ + fputs (stdout, s); + } else { + /* Send directly to the handler */ + serial_puts (s); + } +} + +void printf (const char *fmt, ...) +{ + va_list args; + uint i; + char printbuffer[CFG_PBSIZE]; + + va_start (args, fmt); + + /* For this to work, printbuffer must be larger than + * anything we ever want to print. + */ + i = vsprintf (printbuffer, fmt, args); + va_end (args); + + /* Print the string */ + puts (printbuffer); +} + +/* test if ctrl-c was pressed */ +static int ctrlc_disabled = 0; /* see disable_ctrl() */ +static int ctrlc_was_pressed = 0; +int ctrlc (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + if (!ctrlc_disabled && gd->have_console) { + if (tstc ()) { + switch (getc ()) { + case 0x03: /* ^C - Control C */ + ctrlc_was_pressed = 1; + return 1; + default: + break; + } + } + } + return 0; +} + +/* pass 1 to disable ctrlc() checking, 0 to enable. + * returns previous state + */ +int disable_ctrlc (int disable) +{ + int prev = ctrlc_disabled; /* save previous state */ + + ctrlc_disabled = disable; + return prev; +} + +int had_ctrlc (void) +{ + return ctrlc_was_pressed; +} + +void clear_ctrlc (void) +{ + ctrlc_was_pressed = 0; +} + +#ifdef CONFIG_MODEM_SUPPORT_DEBUG +char screen[1024]; +char *cursor = screen; +int once = 0; +inline void dbg(const char *fmt, ...) +{ + va_list args; + uint i; + char printbuffer[CFG_PBSIZE]; + + if (!once) { + memset(screen, 0, sizeof(screen)); + once++; + } + + va_start(args, fmt); + + /* For this to work, printbuffer must be larger than + * anything we ever want to print. + */ + i = vsprintf(printbuffer, fmt, args); + va_end(args); + + if ((screen + sizeof(screen) - 1 - cursor) < strlen(printbuffer)+1) { + memset(screen, 0, sizeof(screen)); + cursor = screen; + } + sprintf(cursor, printbuffer); + cursor += strlen(printbuffer); + +} +#else +inline void dbg(const char *fmt, ...) +{ +} +#endif + +/** U-Boot INIT FUNCTIONS *************************************************/ + +int console_assign (int file, char *devname) +{ + int flag, i; + + /* Check for valid file */ + switch (file) { + case stdin: + flag = DEV_FLAGS_INPUT; + break; + case stdout: + case stderr: + flag = DEV_FLAGS_OUTPUT; + break; + default: + return -1; + } + + /* Check for valid device name */ + + for (i = 1; i <= ListNumItems (devlist); i++) { + device_t *dev = ListGetPtrToItem (devlist, i); + + if (strcmp (devname, dev->name) == 0) { + if (dev->flags & flag) + return console_setfile (file, dev); + + return -1; + } + } + + return -1; +} + +/* Called before relocation - use serial functions */ +int console_init_f (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + gd->have_console = 1; + return (0); +} + +#ifdef CFG_CONSOLE_IS_IN_ENV +/* search a device */ +device_t *search_device (int flags, char *name) +{ + int i, items; + device_t *dev = NULL; + + items = ListNumItems (devlist); + if (name == NULL) + return dev; + + for (i = 1; i <= items; i++) { + dev = ListGetPtrToItem (devlist, i); + if ((dev->flags & flags) && (strcmp (name, dev->name) == 0)) { + break; + } + } + return dev; +} +#endif /* CFG_CONSOLE_IS_IN_ENV */ + +#ifdef CFG_CONSOLE_IS_IN_ENV +/* Called after the relocation - use desired console functions */ +int console_init_r (void) +{ + char *stdinname, *stdoutname, *stderrname; + device_t *inputdev = NULL, *outputdev = NULL, *errdev = NULL; + + /* set default handlers at first */ + syscall_tbl[SYSCALL_GETC] = serial_getc; + syscall_tbl[SYSCALL_TSTC] = serial_tstc; + syscall_tbl[SYSCALL_PUTC] = serial_putc; + syscall_tbl[SYSCALL_PUTS] = serial_puts; + syscall_tbl[SYSCALL_PRINTF] = serial_printf; + + /* stdin stdout and stderr are in environment */ + /* scan for it */ + stdinname = getenv ("stdin"); + stdoutname = getenv ("stdout"); + stderrname = getenv ("stderr"); + + if (overwrite_console () == 0) { /* if not overwritten by config switch */ + inputdev = search_device (DEV_FLAGS_INPUT, stdinname); + outputdev = search_device (DEV_FLAGS_OUTPUT, stdoutname); + errdev = search_device (DEV_FLAGS_OUTPUT, stderrname); + } + /* if the devices are overwritten or not found, use default device */ + if (inputdev == NULL) { + inputdev = search_device (DEV_FLAGS_INPUT, "serial"); + } + if (outputdev == NULL) { + outputdev = search_device (DEV_FLAGS_OUTPUT, "serial"); + } + if (errdev == NULL) { + errdev = search_device (DEV_FLAGS_OUTPUT, "serial"); + } + /* Initializes output console first */ + if (outputdev != NULL) { + console_setfile (stdout, outputdev); + } + if (errdev != NULL) { + console_setfile (stderr, errdev); + } + if (inputdev != NULL) { + console_setfile (stdin, inputdev); + } + +#ifndef CFG_CONSOLE_INFO_QUIET + /* Print information */ + printf ("In: "); + if (stdio_devices[stdin] == NULL) { + printf ("No input devices available!\n"); + } else { + printf ("%s\n", stdio_devices[stdin]->name); + } + + printf ("Out: "); + if (stdio_devices[stdout] == NULL) { + printf ("No output devices available!\n"); + } else { + printf ("%s\n", stdio_devices[stdout]->name); + } + + printf ("Err: "); + if (stdio_devices[stderr] == NULL) { + printf ("No error devices available!\n"); + } else { + printf ("%s\n", stdio_devices[stderr]->name); + } +#endif /* CFG_CONSOLE_INFO_QUIET */ + +#ifdef CFG_CONSOLE_ENV_OVERWRITE + /* set the environment variables (will overwrite previous env settings) */ + for (i = 0; i < 3; i++) { + setenv (stdio_names[i], stdio_devices[i]->name); + } +#endif /* CFG_CONSOLE_ENV_OVERWRITE */ + +#if 0 + /* If nothing usable installed, use only the initial console */ + if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL)) + return (0); +#endif + return (0); +} + +#else /* CFG_CONSOLE_IS_IN_ENV */ + +/* Called after the relocation - use desired console functions */ +int console_init_r (void) +{ + device_t *inputdev = NULL, *outputdev = NULL; + int i, items = ListNumItems (devlist); + + /* Scan devices looking for input and output devices */ + for (i = 1; + (i <= items) && ((inputdev == NULL) || (outputdev == NULL)); + i++ + ) { + device_t *dev = ListGetPtrToItem (devlist, i); + + if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) { + inputdev = dev; + } + if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) { + outputdev = dev; + } + } + + /* Initializes output console first */ + if (outputdev != NULL) { + console_setfile (stdout, outputdev); + console_setfile (stderr, outputdev); + } + + /* Initializes input console */ + if (inputdev != NULL) { + console_setfile (stdin, inputdev); + } + +#ifndef CFG_CONSOLE_INFO_QUIET + /* Print informations */ + printf ("In: "); + if (stdio_devices[stdin] == NULL) { + printf ("No input devices available!\n"); + } else { + printf ("%s\n", stdio_devices[stdin]->name); + } + + printf ("Out: "); + if (stdio_devices[stdout] == NULL) { + printf ("No output devices available!\n"); + } else { + printf ("%s\n", stdio_devices[stdout]->name); + } + + printf ("Err: "); + if (stdio_devices[stderr] == NULL) { + printf ("No error devices available!\n"); + } else { + printf ("%s\n", stdio_devices[stderr]->name); + } +#endif /* CFG_CONSOLE_INFO_QUIET */ + + /* Setting environment variables */ + for (i = 0; i < 3; i++) { + setenv (stdio_names[i], stdio_devices[i]->name); + } + +#if 0 + /* If nothing usable installed, use only the initial console */ + if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL)) + return (0); +#endif + + return (0); +} + +#endif /* CFG_CONSOLE_IS_IN_ENV */ |