1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2009 Sergey Kubushyn <ksi@koi8.net>
5 * Changes for multibus/multiadapter I2C support.
8 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
18 #include <stdio_dev.h>
22 #include <asm/global_data.h>
23 #include <dm/device-internal.h>
25 DECLARE_GLOBAL_DATA_PTR;
27 static struct stdio_dev devs;
28 struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
29 char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
31 int stdio_file_to_flags(const int file)
35 return DEV_FLAGS_INPUT;
38 return DEV_FLAGS_OUTPUT;
44 #if CONFIG_IS_ENABLED(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! */
61 static void nulldev_register(void)
65 memset(&dev, '\0', sizeof(dev));
67 strcpy(dev.name, "nulldev");
68 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
69 dev.putc = nulldev_putc;
70 dev.puts = nulldev_puts;
71 dev.getc = nulldev_input;
72 dev.tstc = nulldev_input;
77 static inline void nulldev_register(void) {}
78 #endif /* SYS_DEVICE_NULLDEV */
80 static void stdio_serial_putc(struct stdio_dev *dev, const char c)
85 static void stdio_serial_puts(struct stdio_dev *dev, const char *s)
90 #ifdef CONFIG_CONSOLE_FLUSH_SUPPORT
91 static void stdio_serial_flush(struct stdio_dev *dev)
97 static int stdio_serial_getc(struct stdio_dev *dev)
102 static int stdio_serial_tstc(struct stdio_dev *dev)
104 return serial_tstc();
107 /**************************************************************************
109 **************************************************************************
112 static void drv_system_init (void)
114 struct stdio_dev dev;
116 memset (&dev, 0, sizeof (dev));
118 strcpy (dev.name, "serial");
119 dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
120 dev.putc = stdio_serial_putc;
121 dev.puts = stdio_serial_puts;
122 STDIO_DEV_ASSIGN_FLUSH(&dev, stdio_serial_flush);
123 dev.getc = stdio_serial_getc;
124 dev.tstc = stdio_serial_tstc;
125 stdio_register (&dev);
130 /**************************************************************************
132 **************************************************************************
134 struct list_head* stdio_get_list(void)
140 * stdio_probe_device() - Find a device which provides the given stdio device
142 * This looks for a device of the given uclass which provides a particular
143 * stdio device. It is currently really only useful for UCLASS_VIDEO.
145 * Ultimately we want to be able to probe a device by its stdio name. At
146 * present devices register in their probe function (for video devices this
147 * is done in vidconsole_post_probe()) and we don't know what name they will
148 * use until they do so.
149 * TODO(sjg@chromium.org): We should be able to determine the name before
150 * probing, and probe the required device.
152 * @name: stdio device name (e.g. "vidconsole")
153 * id: Uclass ID of device to look for (e.g. UCLASS_VIDEO)
154 * @sdevp: Returns stdout device, if found, else NULL
155 * Return: 0 if found, -ENOENT if no device found with that name, other -ve
158 static int stdio_probe_device(const char *name, enum uclass_id id,
159 struct stdio_dev **sdevp)
161 struct stdio_dev *sdev;
166 seq = trailing_strtoln(name, NULL);
169 ret = uclass_get_device_by_seq(id, seq, &dev);
171 ret = uclass_first_device_err(id, &dev);
173 debug("No %s device for seq %d (%s)\n", uclass_get_name(id),
177 /* The device should be be the last one registered */
178 sdev = list_empty(&devs.list) ? NULL :
179 list_last_entry(&devs.list, struct stdio_dev, list);
180 if (!sdev || strcmp(sdev->name, name)) {
181 debug("Device '%s' did not register with stdio as '%s'\n",
190 struct stdio_dev *stdio_get_by_name(const char *name)
192 struct list_head *pos;
193 struct stdio_dev *sdev;
198 list_for_each(pos, &devs.list) {
199 sdev = list_entry(pos, struct stdio_dev, list);
200 if (strcmp(sdev->name, name) == 0)
203 if (IS_ENABLED(CONFIG_VIDEO)) {
205 * We did not find a suitable stdio device. If there is a video
206 * driver with a name starting with 'vidconsole', we can try
207 * probing that in the hope that it will produce the required
210 * This function is sometimes called with the entire value of
211 * 'stdout', which may include a list of devices separate by
212 * commas. Obviously this is not going to work, so we ignore
213 * that case. The call path in that case is
214 * console_init_r() -> console_search_dev() -> stdio_get_by_name()
216 if (!strncmp(name, "vidconsole", 10) && !strchr(name, ',') &&
217 !stdio_probe_device(name, UCLASS_VIDEO, &sdev))
224 struct stdio_dev *stdio_clone(struct stdio_dev *dev)
226 struct stdio_dev *_dev;
231 _dev = calloc(1, sizeof(struct stdio_dev));
235 memcpy(_dev, dev, sizeof(struct stdio_dev));
240 int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp)
242 struct stdio_dev *_dev;
244 _dev = stdio_clone(dev);
247 list_add_tail(&_dev->list, &devs.list);
254 int stdio_register(struct stdio_dev *dev)
256 return stdio_register_dev(dev, NULL);
259 int stdio_deregister_dev(struct stdio_dev *dev, int force)
261 struct list_head *pos;
262 char temp_names[3][16];
265 /* get stdio devices (ListRemoveItem changes the dev list) */
266 for (i = 0 ; i < MAX_FILES; i++) {
267 if (stdio_devices[i] == dev) {
269 strcpy(temp_names[i], "nulldev");
272 /* Device is assigned -> report error */
275 memcpy(&temp_names[i][0], stdio_devices[i]->name,
276 sizeof(temp_names[i]));
279 list_del(&dev->list);
282 /* reassign device list */
283 list_for_each(pos, &devs.list) {
284 dev = list_entry(pos, struct stdio_dev, list);
285 for (i = 0 ; i < MAX_FILES; i++) {
286 if (strcmp(dev->name, temp_names[i]) == 0)
287 stdio_devices[i] = dev;
294 int stdio_init_tables(void)
296 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
297 /* already relocated for current ARM implementation */
298 ulong relocation_offset = gd->reloc_off;
301 /* relocate device name pointers */
302 for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
303 stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
306 #endif /* CONFIG_NEEDS_MANUAL_RELOC */
308 /* Initialize the list */
309 INIT_LIST_HEAD(&devs.list);
314 int stdio_add_devices(void)
319 if (IS_ENABLED(CONFIG_DM_KEYBOARD)) {
321 * For now we probe all the devices here. At some point this
322 * should be done only when the devices are required - e.g. we
323 * have a list of input devices to start up in the stdin
324 * environment variable. That work probably makes more sense
325 * when stdio itself is converted to driver model.
329 * Don't report errors to the caller - assume that they are
332 for (ret = uclass_first_device_check(UCLASS_KEYBOARD, &dev);
334 ret = uclass_next_device_check(&dev)) {
336 printf("%s: Failed to probe keyboard '%s' (ret=%d)\n",
337 __func__, dev->name, ret);
340 #if CONFIG_IS_ENABLED(SYS_I2C_LEGACY)
343 if (IS_ENABLED(CONFIG_VIDEO)) {
345 * If the console setting is not in environment variables then
346 * console_init_r() will not be calling iomux_doenv() (which
347 * calls console_search_dev()). So we will not dynamically add
348 * devices by calling stdio_probe_device().
350 * So just probe all video devices now so that whichever one is
351 * required will be available.
353 struct udevice *vdev;
356 if (!IS_ENABLED(CONFIG_SYS_CONSOLE_IS_IN_ENV)) {
357 for (ret = uclass_first_device_check(UCLASS_VIDEO,
360 ret = uclass_next_device_check(&vdev)) {
362 printf("%s: Failed to probe video device '%s' (ret=%d)\n",
363 __func__, vdev->name, ret);
366 if (IS_ENABLED(CONFIG_SPLASH_SCREEN) &&
367 IS_ENABLED(CONFIG_CMD_BMP))
373 #ifdef CONFIG_USB_TTY
376 #ifdef CONFIG_USB_FUNCTION_ACM
379 if (IS_ENABLED(CONFIG_NETCONSOLE))
381 #ifdef CONFIG_JTAG_CONSOLE
382 drv_jtag_console_init();
384 if (IS_ENABLED(CONFIG_CBMEM_CONSOLE))