]>
git.ipfire.org Git - people/ms/u-boot.git/blob - common/stdio.c
2 * Copyright (C) 2009 Sergey Kubushyn <ksi@koi8.net>
4 * Changes for multibus/multiadapter I2C support.
7 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
9 * SPDX-License-Identifier: GPL-2.0+
18 #include <stdio_dev.h>
20 #ifdef CONFIG_LOGBUFFER
24 #if defined(CONFIG_SYS_I2C)
28 #include <dm/device-internal.h>
30 DECLARE_GLOBAL_DATA_PTR
;
32 static struct stdio_dev devs
;
33 struct stdio_dev
*stdio_devices
[] = { NULL
, NULL
, NULL
};
34 char *stdio_names
[MAX_FILES
] = { "stdin", "stdout", "stderr" };
36 #if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV)
37 #define CONFIG_SYS_DEVICE_NULLDEV 1
40 #if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
41 #define CONFIG_SYS_DEVICE_NULLDEV 1
44 #ifdef CONFIG_SYS_DEVICE_NULLDEV
45 static void nulldev_putc(struct stdio_dev
*dev
, const char c
)
47 /* nulldev is empty! */
50 static void nulldev_puts(struct stdio_dev
*dev
, const char *s
)
52 /* nulldev is empty! */
55 static int nulldev_input(struct stdio_dev
*dev
)
57 /* nulldev is empty! */
62 static void stdio_serial_putc(struct stdio_dev
*dev
, const char c
)
67 static void stdio_serial_puts(struct stdio_dev
*dev
, const char *s
)
72 static int stdio_serial_getc(struct stdio_dev
*dev
)
77 static int stdio_serial_tstc(struct stdio_dev
*dev
)
82 /**************************************************************************
84 **************************************************************************
87 static void drv_system_init (void)
91 memset (&dev
, 0, sizeof (dev
));
93 strcpy (dev
.name
, "serial");
94 dev
.flags
= DEV_FLAGS_OUTPUT
| DEV_FLAGS_INPUT
;
95 dev
.putc
= stdio_serial_putc
;
96 dev
.puts
= stdio_serial_puts
;
97 dev
.getc
= stdio_serial_getc
;
98 dev
.tstc
= stdio_serial_tstc
;
99 stdio_register (&dev
);
101 #ifdef CONFIG_SYS_DEVICE_NULLDEV
102 memset (&dev
, 0, sizeof (dev
));
104 strcpy (dev
.name
, "nulldev");
105 dev
.flags
= DEV_FLAGS_OUTPUT
| DEV_FLAGS_INPUT
;
106 dev
.putc
= nulldev_putc
;
107 dev
.puts
= nulldev_puts
;
108 dev
.getc
= nulldev_input
;
109 dev
.tstc
= nulldev_input
;
111 stdio_register (&dev
);
115 /**************************************************************************
117 **************************************************************************
119 struct list_head
* stdio_get_list(void)
124 #ifdef CONFIG_DM_VIDEO
126 * stdio_probe_device() - Find a device which provides the given stdio device
128 * This looks for a device of the given uclass which provides a particular
129 * stdio device. It is currently really only useful for UCLASS_VIDEO.
131 * Ultimately we want to be able to probe a device by its stdio name. At
132 * present devices register in their probe function (for video devices this
133 * is done in vidconsole_post_probe()) and we don't know what name they will
134 * use until they do so.
135 * TODO(sjg@chromium.org): We should be able to determine the name before
136 * probing, and probe the required device.
138 * @name: stdio device name (e.g. "vidconsole")
139 * id: Uclass ID of device to look for (e.g. UCLASS_VIDEO)
140 * @sdevp: Returns stdout device, if found, else NULL
141 * @return 0 if found, -ENOENT if no device found with that name, other -ve
144 static int stdio_probe_device(const char *name
, enum uclass_id id
,
145 struct stdio_dev
**sdevp
)
147 struct stdio_dev
*sdev
;
152 seq
= trailing_strtoln(name
, NULL
);
155 ret
= uclass_get_device_by_seq(id
, seq
, &dev
);
157 ret
= uclass_first_device_err(id
, &dev
);
159 debug("No %s device for seq %d (%s)\n", uclass_get_name(id
),
163 /* The device should be be the last one registered */
164 sdev
= list_empty(&devs
.list
) ? NULL
:
165 list_last_entry(&devs
.list
, struct stdio_dev
, list
);
166 if (!sdev
|| strcmp(sdev
->name
, name
)) {
167 debug("Device '%s' did not register with stdio as '%s'\n",
177 struct stdio_dev
*stdio_get_by_name(const char *name
)
179 struct list_head
*pos
;
180 struct stdio_dev
*sdev
;
185 list_for_each(pos
, &(devs
.list
)) {
186 sdev
= list_entry(pos
, struct stdio_dev
, list
);
187 if (strcmp(sdev
->name
, name
) == 0)
190 #ifdef CONFIG_DM_VIDEO
192 * We did not find a suitable stdio device. If there is a video
193 * driver with a name starting with 'vidconsole', we can try probing
194 * that in the hope that it will produce the required stdio device.
196 * This function is sometimes called with the entire value of
197 * 'stdout', which may include a list of devices separate by commas.
198 * Obviously this is not going to work, so we ignore that case. The
199 * call path in that case is console_init_r() -> search_device() ->
200 * stdio_get_by_name().
202 if (!strncmp(name
, "vidconsole", 10) && !strchr(name
, ',') &&
203 !stdio_probe_device(name
, UCLASS_VIDEO
, &sdev
))
210 struct stdio_dev
* stdio_clone(struct stdio_dev
*dev
)
212 struct stdio_dev
*_dev
;
217 _dev
= calloc(1, sizeof(struct stdio_dev
));
222 memcpy(_dev
, dev
, sizeof(struct stdio_dev
));
227 int stdio_register_dev(struct stdio_dev
*dev
, struct stdio_dev
**devp
)
229 struct stdio_dev
*_dev
;
231 _dev
= stdio_clone(dev
);
234 list_add_tail(&(_dev
->list
), &(devs
.list
));
241 int stdio_register(struct stdio_dev
*dev
)
243 return stdio_register_dev(dev
, NULL
);
246 /* deregister the device "devname".
247 * returns 0 if success, -1 if device is assigned and 1 if devname not found
249 #if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
250 int stdio_deregister_dev(struct stdio_dev
*dev
, int force
)
253 struct list_head
*pos
;
254 char temp_names
[3][16];
256 /* get stdio devices (ListRemoveItem changes the dev list) */
257 for (l
=0 ; l
< MAX_FILES
; l
++) {
258 if (stdio_devices
[l
] == dev
) {
260 strcpy(temp_names
[l
], "nulldev");
263 /* Device is assigned -> report error */
266 memcpy (&temp_names
[l
][0],
267 stdio_devices
[l
]->name
,
268 sizeof(temp_names
[l
]));
271 list_del(&(dev
->list
));
274 /* reassign Device list */
275 list_for_each(pos
, &(devs
.list
)) {
276 dev
= list_entry(pos
, struct stdio_dev
, list
);
277 for (l
=0 ; l
< MAX_FILES
; l
++) {
278 if(strcmp(dev
->name
, temp_names
[l
]) == 0)
279 stdio_devices
[l
] = dev
;
285 int stdio_deregister(const char *devname
, int force
)
287 struct stdio_dev
*dev
;
289 dev
= stdio_get_by_name(devname
);
291 if (!dev
) /* device not found */
294 return stdio_deregister_dev(dev
, force
);
296 #endif /* CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER) */
298 int stdio_init_tables(void)
300 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
301 /* already relocated for current ARM implementation */
302 ulong relocation_offset
= gd
->reloc_off
;
305 /* relocate device name pointers */
306 for (i
= 0; i
< (sizeof (stdio_names
) / sizeof (char *)); ++i
) {
307 stdio_names
[i
] = (char *) (((ulong
) stdio_names
[i
]) +
310 #endif /* CONFIG_NEEDS_MANUAL_RELOC */
312 /* Initialize the list */
313 INIT_LIST_HEAD(&(devs
.list
));
318 int stdio_add_devices(void)
320 #ifdef CONFIG_DM_KEYBOARD
326 * For now we probe all the devices here. At some point this should be
327 * done only when the devices are required - e.g. we have a list of
328 * input devices to start up in the stdin environment variable. That
329 * work probably makes more sense when stdio itself is converted to
332 * TODO(sjg@chromium.org): Convert changing uclass_first_device() etc.
333 * to return the device even on error. Then we could use that here.
335 ret
= uclass_get(UCLASS_KEYBOARD
, &uc
);
339 /* Don't report errors to the caller - assume that they are non-fatal */
340 uclass_foreach_dev(dev
, uc
) {
341 ret
= device_probe(dev
);
343 printf("Failed to probe keyboard '%s'\n", dev
->name
);
346 #ifdef CONFIG_SYS_I2C
350 #ifdef CONFIG_DM_VIDEO
352 * If the console setting is not in environment variables then
353 * console_init_r() will not be calling iomux_doenv() (which calls
354 * search_device()). So we will not dynamically add devices by
355 * calling stdio_probe_device().
357 * So just probe all video devices now so that whichever one is
358 * required will be available.
360 #ifndef CONFIG_SYS_CONSOLE_IS_IN_ENV
361 struct udevice
*vdev
;
362 # ifndef CONFIG_DM_KEYBOARD
366 for (ret
= uclass_first_device(UCLASS_VIDEO
, &vdev
);
368 ret
= uclass_next_device(&vdev
))
371 printf("%s: Video device failed (ret=%d)\n", __func__
, ret
);
372 #endif /* !CONFIG_SYS_CONSOLE_IS_IN_ENV */
374 # if defined(CONFIG_LCD)
377 # if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
380 #endif /* CONFIG_DM_VIDEO */
381 #if defined(CONFIG_KEYBOARD) && !defined(CONFIG_DM_KEYBOARD)
382 drv_keyboard_init ();
384 #ifdef CONFIG_LOGBUFFER
388 serial_stdio_init ();
389 #ifdef CONFIG_USB_TTY
392 #ifdef CONFIG_NETCONSOLE
395 #ifdef CONFIG_JTAG_CONSOLE
396 drv_jtag_console_init ();
398 #ifdef CONFIG_CBMEM_CONSOLE