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Initial revision
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wdenk
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193
common/devices.c
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193
common/devices.c
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/*
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* (C) Copyright 2000
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* Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <config.h>
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#include <common.h>
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#include <stdarg.h>
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#include <malloc.h>
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#include <devices.h>
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#include <i2c.h>
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list_t devlist = 0;
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device_t *stdio_devices[] = { NULL, NULL, NULL };
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char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
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#ifdef CFG_DEVICE_NULLDEV
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void nulldev_putc(const char c)
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{
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/* nulldev is empty! */
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}
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void nulldev_puts(const char *s)
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{
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/* nulldev is empty! */
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}
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int nulldev_input(void)
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{
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/* nulldev is empty! */
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return 0;
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}
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#endif
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/**************************************************************************
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* SYSTEM DRIVERS
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**************************************************************************
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*/
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static void drv_system_init (void)
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{
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device_t dev;
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memset (&dev, 0, sizeof (dev));
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strcpy (dev.name, "serial");
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dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
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#if CONFIG_SERIAL_SOFTWARE_FIFO
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dev.putc = serial_buffered_putc;
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dev.puts = serial_buffered_puts;
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dev.getc = serial_buffered_getc;
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dev.tstc = serial_buffered_tstc;
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#else
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dev.putc = serial_putc;
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dev.puts = serial_puts;
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dev.getc = serial_getc;
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dev.tstc = serial_tstc;
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#endif
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device_register (&dev);
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#ifdef CFG_DEVICE_NULLDEV
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memset (&dev, 0, sizeof (dev));
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strcpy (dev.name, "nulldev");
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dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
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dev.putc = nulldev_putc;
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dev.puts = nulldev_puts;
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dev.getc = nulldev_input;
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dev.tstc = nulldev_input;
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device_register (&dev);
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#endif
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}
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/**************************************************************************
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* DEVICES
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**************************************************************************
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*/
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int device_register (device_t * dev)
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{
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ListInsertItem (devlist, dev, LIST_END);
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return 0;
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}
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/* deregister the device "devname".
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* returns 0 if success, -1 if device is assigned and 1 if devname not found
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*/
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#ifdef CFG_DEVICE_DEREGISTER
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int device_deregister(char *devname)
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{
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int i,l,dev_index;
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device_t *dev = NULL;
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char temp_names[3][8];
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dev_index=-1;
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for (i=1; i<=ListNumItems(devlist); i++) {
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dev = ListGetPtrToItem (devlist, i);
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if(strcmp(dev->name,devname)==0) {
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dev_index=i;
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break;
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}
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}
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if(dev_index<0) /* device not found */
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return 0;
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/* get stdio devices (ListRemoveItem changes the dev list) */
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for (l=0 ; l< MAX_FILES; l++) {
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if (stdio_devices[l] == dev) {
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/* Device is assigned -> report error */
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return -1;
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}
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memcpy (&temp_names[l][0],
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stdio_devices[l]->name,
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sizeof(stdio_devices[l]->name));
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}
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ListRemoveItem(devlist,NULL,dev_index);
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/* reassign Device list */
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for (i=1; i<=ListNumItems(devlist); i++) {
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dev = ListGetPtrToItem (devlist, i);
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for (l=0 ; l< MAX_FILES; l++) {
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if(strcmp(dev->name,temp_names[l])==0) {
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stdio_devices[l] = dev;
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}
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}
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}
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return 0;
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}
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#endif /* CFG_DEVICE_DEREGISTER */
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int devices_init (void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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int i;
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ulong relocation_offset = gd->reloc_off;
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/* relocate device name pointers */
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for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
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stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
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relocation_offset);
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}
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/* Initialize the list */
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devlist = ListCreate (sizeof (device_t));
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if (devlist == NULL) {
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eputs ("Cannot initialize the list of devices!\n");
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return -1;
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}
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#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
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i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
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#endif
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#ifdef CONFIG_LCD
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drv_lcd_init ();
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#endif
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#ifdef CONFIG_VIDEO
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drv_video_init ();
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#endif
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#ifdef CONFIG_WL_4PPM_KEYBOARD
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drv_wlkbd_init ();
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#endif
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drv_system_init ();
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gd-> flags |= GD_FLG_DEVINIT; /* device initialization done */
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return (0);
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}
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int devices_done (void)
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{
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ListDispose (devlist);
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return 0;
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}
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