source: SVN/rincon/u-boot/common/devices.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 2 years ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 5.2 KB
Line 
1/*
2 * (C) Copyright 2000
3 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <config.h>
25#include <common.h>
26#include <stdarg.h>
27#include <malloc.h>
28#include <devices.h>
29#include <serial.h>
30#ifdef CONFIG_LOGBUFFER
31#include <logbuff.h>
32#endif
33#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
34#include <i2c.h>
35#endif
36
37DECLARE_GLOBAL_DATA_PTR;
38
39static device_t devs;
40device_t *stdio_devices[] = { NULL, NULL, NULL };
41char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
42
43#if defined(CONFIG_SPLASH_SCREEN) && !defined(CFG_DEVICE_NULLDEV)
44#define CFG_DEVICE_NULLDEV      1
45#endif
46
47
48#ifdef CFG_DEVICE_NULLDEV
49void nulldev_putc(const char c)
50{
51        /* nulldev is empty! */
52}
53
54void nulldev_puts(const char *s)
55{
56        /* nulldev is empty! */
57}
58
59int nulldev_input(void)
60{
61        /* nulldev is empty! */
62        return 0;
63}
64#endif
65
66/**************************************************************************
67 * SYSTEM DRIVERS
68 **************************************************************************
69 */
70
71static void drv_system_init (void)
72{
73        device_t dev;
74
75        memset (&dev, 0, sizeof (dev));
76
77        strcpy (dev.name, "serial");
78        dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
79#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
80        dev.putc = serial_buffered_putc;
81        dev.puts = serial_buffered_puts;
82        dev.getc = serial_buffered_getc;
83        dev.tstc = serial_buffered_tstc;
84#else
85        dev.putc = serial_putc;
86        dev.puts = serial_puts;
87        dev.getc = serial_getc;
88        dev.tstc = serial_tstc;
89#endif
90
91        device_register (&dev);
92
93#ifdef CFG_DEVICE_NULLDEV
94        memset (&dev, 0, sizeof (dev));
95
96        strcpy (dev.name, "nulldev");
97        dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
98        dev.putc = nulldev_putc;
99        dev.puts = nulldev_puts;
100        dev.getc = nulldev_input;
101        dev.tstc = nulldev_input;
102
103        device_register (&dev);
104#endif
105}
106
107/**************************************************************************
108 * DEVICES
109 **************************************************************************
110 */
111struct list_head* device_get_list(void)
112{
113        return &(devs.list);
114}
115
116device_t* device_get_by_name(char* name)
117{
118        struct list_head *pos;
119        device_t *dev;
120
121        if(!name)
122                return NULL;
123
124        list_for_each(pos, &(devs.list)) {
125                dev = list_entry(pos, device_t, list);
126                if(strcmp(dev->name, name) == 0)
127                        return dev;
128        }
129
130        return NULL;
131}
132
133device_t* device_clone(device_t *dev)
134{
135        device_t *_dev;
136
137        if(!dev)
138                return NULL;
139
140        _dev = calloc(1, sizeof(device_t));
141
142        if(!_dev)
143                return NULL;
144
145        memcpy(_dev, dev, sizeof(device_t));
146        strncpy(_dev->name, dev->name, 16);
147
148        return _dev;
149}
150
151int device_register (device_t * dev)
152{
153        device_t *_dev;
154
155        _dev = device_clone(dev);
156        if(!_dev)
157                return -1;
158        list_add_tail(&(_dev->list), &(devs.list));
159        return 0;
160}
161
162/* deregister the device "devname".
163 * returns 0 if success, -1 if device is assigned and 1 if devname not found
164 */
165#ifdef  CFG_DEVICE_DEREGISTER
166int device_deregister(char *devname)
167{
168        int l;
169        struct list_head *pos;
170        device_t *dev;
171        char temp_names[3][8];
172
173        dev = device_get_by_name(devname);
174
175        if(!dev) /* device not found */
176                return -1;
177        /* get stdio devices (ListRemoveItem changes the dev list) */
178        for (l=0 ; l< MAX_FILES; l++) {
179                if (stdio_devices[l] == dev) {
180                        /* Device is assigned -> report error */
181                        return -1;
182                }
183                memcpy (&temp_names[l][0],
184                        stdio_devices[l]->name,
185                        sizeof(stdio_devices[l]->name));
186        }
187
188        list_del(&(dev->list));
189
190        /* reassign Device list */
191        list_for_each(pos, &(devs.list)) {
192                dev = list_entry(pos, device_t, list);
193                for (l=0 ; l< MAX_FILES; l++) {
194                        if(strcmp(dev->name, temp_names[l]) == 0)
195                                stdio_devices[l] = dev;
196                }
197        }
198        return 0;
199}
200#endif  /* CFG_DEVICE_DEREGISTER */
201
202int devices_init (void)
203{
204#ifndef CONFIG_ARM      /* already relocated for current ARM implementation */
205        ulong relocation_offset = gd->reloc_off;
206        int i;
207
208        /* relocate device name pointers */
209        for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
210                stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
211                                                relocation_offset);
212        }
213#endif
214
215        /* Initialize the list */
216        INIT_LIST_HEAD(&(devs.list));
217
218#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
219        i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
220#endif
221#ifdef CONFIG_LCD
222        drv_lcd_init ();
223#endif
224#if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
225        drv_video_init ();
226#endif
227#ifdef CONFIG_KEYBOARD
228        drv_keyboard_init ();
229#endif
230#ifdef CONFIG_LOGBUFFER
231        drv_logbuff_init ();
232#endif
233        drv_system_init ();
234#ifdef CONFIG_SERIAL_MULTI
235        serial_devices_init ();
236#endif
237#ifdef CONFIG_USB_TTY
238        drv_usbtty_init ();
239#endif
240#ifdef CONFIG_NETCONSOLE
241        drv_nc_init ();
242#endif
243
244        return (0);
245}
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