xref: /openbmc/u-boot/common/stdio.c (revision 25ceb277)
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 <stdio_dev.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 
37 DECLARE_GLOBAL_DATA_PTR;
38 
39 static struct stdio_dev devs;
40 struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
41 char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
42 
43 #if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV)
44 #define	CONFIG_SYS_DEVICE_NULLDEV	1
45 #endif
46 
47 
48 #ifdef CONFIG_SYS_DEVICE_NULLDEV
49 void nulldev_putc(const char c)
50 {
51 	/* nulldev is empty! */
52 }
53 
54 void nulldev_puts(const char *s)
55 {
56 	/* nulldev is empty! */
57 }
58 
59 int nulldev_input(void)
60 {
61 	/* nulldev is empty! */
62 	return 0;
63 }
64 #endif
65 
66 /**************************************************************************
67  * SYSTEM DRIVERS
68  **************************************************************************
69  */
70 
71 static void drv_system_init (void)
72 {
73 	struct stdio_dev 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 	dev.putc = serial_putc;
80 	dev.puts = serial_puts;
81 	dev.getc = serial_getc;
82 	dev.tstc = serial_tstc;
83 	stdio_register (&dev);
84 
85 #ifdef CONFIG_SYS_DEVICE_NULLDEV
86 	memset (&dev, 0, sizeof (dev));
87 
88 	strcpy (dev.name, "nulldev");
89 	dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
90 	dev.putc = nulldev_putc;
91 	dev.puts = nulldev_puts;
92 	dev.getc = nulldev_input;
93 	dev.tstc = nulldev_input;
94 
95 	stdio_register (&dev);
96 #endif
97 }
98 
99 /**************************************************************************
100  * DEVICES
101  **************************************************************************
102  */
103 struct list_head* stdio_get_list(void)
104 {
105 	return &(devs.list);
106 }
107 
108 struct stdio_dev* stdio_get_by_name(const char *name)
109 {
110 	struct list_head *pos;
111 	struct stdio_dev *dev;
112 
113 	if(!name)
114 		return NULL;
115 
116 	list_for_each(pos, &(devs.list)) {
117 		dev = list_entry(pos, struct stdio_dev, list);
118 		if(strcmp(dev->name, name) == 0)
119 			return dev;
120 	}
121 
122 	return NULL;
123 }
124 
125 struct stdio_dev* stdio_clone(struct stdio_dev *dev)
126 {
127 	struct stdio_dev *_dev;
128 
129 	if(!dev)
130 		return NULL;
131 
132 	_dev = calloc(1, sizeof(struct stdio_dev));
133 
134 	if(!_dev)
135 		return NULL;
136 
137 	memcpy(_dev, dev, sizeof(struct stdio_dev));
138 	strncpy(_dev->name, dev->name, 16);
139 
140 	return _dev;
141 }
142 
143 int stdio_register (struct stdio_dev * dev)
144 {
145 	struct stdio_dev *_dev;
146 
147 	_dev = stdio_clone(dev);
148 	if(!_dev)
149 		return -1;
150 	list_add_tail(&(_dev->list), &(devs.list));
151 	return 0;
152 }
153 
154 /* deregister the device "devname".
155  * returns 0 if success, -1 if device is assigned and 1 if devname not found
156  */
157 #ifdef	CONFIG_SYS_STDIO_DEREGISTER
158 int stdio_deregister(const char *devname)
159 {
160 	int l;
161 	struct list_head *pos;
162 	struct stdio_dev *dev;
163 	char temp_names[3][16];
164 
165 	dev = stdio_get_by_name(devname);
166 
167 	if(!dev) /* device not found */
168 		return -1;
169 	/* get stdio devices (ListRemoveItem changes the dev list) */
170 	for (l=0 ; l< MAX_FILES; l++) {
171 		if (stdio_devices[l] == dev) {
172 			/* Device is assigned -> report error */
173 			return -1;
174 		}
175 		memcpy (&temp_names[l][0],
176 			stdio_devices[l]->name,
177 			sizeof(temp_names[l]));
178 	}
179 
180 	list_del(&(dev->list));
181 
182 	/* reassign Device list */
183 	list_for_each(pos, &(devs.list)) {
184 		dev = list_entry(pos, struct stdio_dev, list);
185 		for (l=0 ; l< MAX_FILES; l++) {
186 			if(strcmp(dev->name, temp_names[l]) == 0)
187 				stdio_devices[l] = dev;
188 		}
189 	}
190 	return 0;
191 }
192 #endif	/* CONFIG_SYS_STDIO_DEREGISTER */
193 
194 int stdio_init (void)
195 {
196 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
197 	/* already relocated for current ARM implementation */
198 	ulong relocation_offset = gd->reloc_off;
199 	int i;
200 
201 	/* relocate device name pointers */
202 	for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
203 		stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
204 						relocation_offset);
205 	}
206 #endif /* CONFIG_NEEDS_MANUAL_RELOC */
207 
208 	/* Initialize the list */
209 	INIT_LIST_HEAD(&(devs.list));
210 
211 #ifdef CONFIG_ARM_DCC_MULTI
212 	drv_arm_dcc_init ();
213 #endif
214 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
215 	i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
216 #endif
217 #ifdef CONFIG_LCD
218 	drv_lcd_init ();
219 #endif
220 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
221 	drv_video_init ();
222 #endif
223 #ifdef CONFIG_KEYBOARD
224 	drv_keyboard_init ();
225 #endif
226 #ifdef CONFIG_LOGBUFFER
227 	drv_logbuff_init ();
228 #endif
229 	drv_system_init ();
230 #ifdef CONFIG_SERIAL_MULTI
231 	serial_stdio_init ();
232 #endif
233 #ifdef CONFIG_USB_TTY
234 	drv_usbtty_init ();
235 #endif
236 #ifdef CONFIG_NETCONSOLE
237 	drv_nc_init ();
238 #endif
239 #ifdef CONFIG_JTAG_CONSOLE
240 	drv_jtag_console_init ();
241 #endif
242 
243 	return (0);
244 }
245