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| -rw-r--r-- | common/devices.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/common/devices.c b/common/devices.c new file mode 100644 index 0000000000..2d0b04614f --- /dev/null +++ b/common/devices.c @@ -0,0 +1,193 @@ +/* + * (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 <config.h> +#include <common.h> +#include <stdarg.h> +#include <malloc.h> +#include <devices.h> +#include <i2c.h> + +list_t devlist = 0; +device_t *stdio_devices[] = { NULL, NULL, NULL }; +char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" }; + +#ifdef CFG_DEVICE_NULLDEV +void nulldev_putc(const char c) +{ + /* nulldev is empty! */ +} + +void nulldev_puts(const char *s) +{ + /* nulldev is empty! */ +} + +int nulldev_input(void) +{ + /* nulldev is empty! */ + return 0; +} +#endif + +/************************************************************************** + * SYSTEM DRIVERS + ************************************************************************** + */ + +static void drv_system_init (void) +{ + device_t dev; + + memset (&dev, 0, sizeof (dev)); + + strcpy (dev.name, "serial"); + dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM; +#if CONFIG_SERIAL_SOFTWARE_FIFO + dev.putc = serial_buffered_putc; + dev.puts = serial_buffered_puts; + dev.getc = serial_buffered_getc; + dev.tstc = serial_buffered_tstc; +#else + dev.putc = serial_putc; + dev.puts = serial_puts; + dev.getc = serial_getc; + dev.tstc = serial_tstc; +#endif + + device_register (&dev); + +#ifdef CFG_DEVICE_NULLDEV + memset (&dev, 0, sizeof (dev)); + + strcpy (dev.name, "nulldev"); + dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM; + dev.putc = nulldev_putc; + dev.puts = nulldev_puts; + dev.getc = nulldev_input; + dev.tstc = nulldev_input; + + device_register (&dev); +#endif +} + +/************************************************************************** + * DEVICES + ************************************************************************** + */ + +int device_register (device_t * dev) +{ + ListInsertItem (devlist, dev, LIST_END); + return 0; +} + +/* deregister the device "devname". + * returns 0 if success, -1 if device is assigned and 1 if devname not found + */ +#ifdef CFG_DEVICE_DEREGISTER +int device_deregister(char *devname) +{ + int i,l,dev_index; + device_t *dev = NULL; + char temp_names[3][8]; + + dev_index=-1; + for (i=1; i<=ListNumItems(devlist); i++) { + dev = ListGetPtrToItem (devlist, i); + if(strcmp(dev->name,devname)==0) { + dev_index=i; + break; + } + } + if(dev_index<0) /* device not found */ + return 0; + /* get stdio devices (ListRemoveItem changes the dev list) */ + for (l=0 ; l< MAX_FILES; l++) { + if (stdio_devices[l] == dev) { + /* Device is assigned -> report error */ + return -1; + } + memcpy (&temp_names[l][0], + stdio_devices[l]->name, + sizeof(stdio_devices[l]->name)); + } + ListRemoveItem(devlist,NULL,dev_index); + /* reassign Device list */ + for (i=1; i<=ListNumItems(devlist); i++) { + dev = ListGetPtrToItem (devlist, i); + for (l=0 ; l< MAX_FILES; l++) { + if(strcmp(dev->name,temp_names[l])==0) { + stdio_devices[l] = dev; + } + } + } + return 0; +} +#endif /* CFG_DEVICE_DEREGISTER */ + +int devices_init (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + int i; + ulong relocation_offset = gd->reloc_off; + + /* relocate device name pointers */ + for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) { + stdio_names[i] = (char *) (((ulong) stdio_names[i]) + + relocation_offset); + } + + /* Initialize the list */ + devlist = ListCreate (sizeof (device_t)); + + if (devlist == NULL) { + eputs ("Cannot initialize the list of devices!\n"); + return -1; + } +#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) + i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE); +#endif +#ifdef CONFIG_LCD + drv_lcd_init (); +#endif +#ifdef CONFIG_VIDEO + drv_video_init (); +#endif +#ifdef CONFIG_WL_4PPM_KEYBOARD + drv_wlkbd_init (); +#endif + drv_system_init (); + + gd-> flags |= GD_FLG_DEVINIT; /* device initialization done */ + + return (0); +} + +int devices_done (void) +{ + ListDispose (devlist); + + return 0; +} |