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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2009 Sergey Kubushyn <ksi@koi8.net>
- *
- * Changes for multibus/multiadapter I2C support.
- *
- * (C) Copyright 2000
- * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
- */
- #include <config.h>
- #include <common.h>
- #include <dm.h>
- #include <errno.h>
- #include <log.h>
- #include <stdarg.h>
- #include <malloc.h>
- #include <stdio_dev.h>
- #include <serial.h>
- #include <splash.h>
- #include <i2c.h>
- #include <dm/device-internal.h>
- DECLARE_GLOBAL_DATA_PTR;
- static struct stdio_dev devs;
- struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
- char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
- static void nulldev_putc(struct stdio_dev *dev, const char c)
- {
- /* nulldev is empty! */
- }
- static void nulldev_puts(struct stdio_dev *dev, const char *s)
- {
- /* nulldev is empty! */
- }
- static int nulldev_input(struct stdio_dev *dev)
- {
- /* nulldev is empty! */
- return 0;
- }
- static void stdio_serial_putc(struct stdio_dev *dev, const char c)
- {
- serial_putc(c);
- }
- static void stdio_serial_puts(struct stdio_dev *dev, const char *s)
- {
- serial_puts(s);
- }
- static int stdio_serial_getc(struct stdio_dev *dev)
- {
- return serial_getc();
- }
- static int stdio_serial_tstc(struct stdio_dev *dev)
- {
- return serial_tstc();
- }
- /**************************************************************************
- * SYSTEM DRIVERS
- **************************************************************************
- */
- static void drv_system_init (void)
- {
- struct stdio_dev dev;
- memset (&dev, 0, sizeof (dev));
- strcpy (dev.name, "serial");
- dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
- dev.putc = stdio_serial_putc;
- dev.puts = stdio_serial_puts;
- dev.getc = stdio_serial_getc;
- dev.tstc = stdio_serial_tstc;
- stdio_register (&dev);
- if (CONFIG_IS_ENABLED(SYS_DEVICE_NULLDEV)) {
- memset(&dev, '\0', sizeof(dev));
- strcpy(dev.name, "nulldev");
- dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
- dev.putc = nulldev_putc;
- dev.puts = nulldev_puts;
- dev.getc = nulldev_input;
- dev.tstc = nulldev_input;
- stdio_register(&dev);
- }
- }
- /**************************************************************************
- * DEVICES
- **************************************************************************
- */
- struct list_head* stdio_get_list(void)
- {
- return &devs.list;
- }
- /**
- * stdio_probe_device() - Find a device which provides the given stdio device
- *
- * This looks for a device of the given uclass which provides a particular
- * stdio device. It is currently really only useful for UCLASS_VIDEO.
- *
- * Ultimately we want to be able to probe a device by its stdio name. At
- * present devices register in their probe function (for video devices this
- * is done in vidconsole_post_probe()) and we don't know what name they will
- * use until they do so.
- * TODO(sjg@chromium.org): We should be able to determine the name before
- * probing, and probe the required device.
- *
- * @name: stdio device name (e.g. "vidconsole")
- * id: Uclass ID of device to look for (e.g. UCLASS_VIDEO)
- * @sdevp: Returns stdout device, if found, else NULL
- * @return 0 if found, -ENOENT if no device found with that name, other -ve
- * on other error
- */
- static int stdio_probe_device(const char *name, enum uclass_id id,
- struct stdio_dev **sdevp)
- {
- struct stdio_dev *sdev;
- struct udevice *dev;
- int seq, ret;
- *sdevp = NULL;
- seq = trailing_strtoln(name, NULL);
- if (seq == -1)
- seq = 0;
- ret = uclass_get_device_by_seq(id, seq, &dev);
- if (ret == -ENODEV)
- ret = uclass_first_device_err(id, &dev);
- if (ret) {
- debug("No %s device for seq %d (%s)\n", uclass_get_name(id),
- seq, name);
- return ret;
- }
- /* The device should be be the last one registered */
- sdev = list_empty(&devs.list) ? NULL :
- list_last_entry(&devs.list, struct stdio_dev, list);
- if (!sdev || strcmp(sdev->name, name)) {
- debug("Device '%s' did not register with stdio as '%s'\n",
- dev->name, name);
- return -ENOENT;
- }
- *sdevp = sdev;
- return 0;
- }
- struct stdio_dev *stdio_get_by_name(const char *name)
- {
- struct list_head *pos;
- struct stdio_dev *sdev;
- if (!name)
- return NULL;
- list_for_each(pos, &devs.list) {
- sdev = list_entry(pos, struct stdio_dev, list);
- if (strcmp(sdev->name, name) == 0)
- return sdev;
- }
- if (IS_ENABLED(CONFIG_DM_VIDEO)) {
- /*
- * We did not find a suitable stdio device. If there is a video
- * driver with a name starting with 'vidconsole', we can try
- * probing that in the hope that it will produce the required
- * stdio device.
- *
- * This function is sometimes called with the entire value of
- * 'stdout', which may include a list of devices separate by
- * commas. Obviously this is not going to work, so we ignore
- * that case. The call path in that case is
- * console_init_r() -> search_device() -> stdio_get_by_name()
- */
- if (!strncmp(name, "vidconsole", 10) && !strchr(name, ',') &&
- !stdio_probe_device(name, UCLASS_VIDEO, &sdev))
- return sdev;
- }
- return NULL;
- }
- struct stdio_dev *stdio_clone(struct stdio_dev *dev)
- {
- struct stdio_dev *_dev;
- if (!dev)
- return NULL;
- _dev = calloc(1, sizeof(struct stdio_dev));
- if (!_dev)
- return NULL;
- memcpy(_dev, dev, sizeof(struct stdio_dev));
- return _dev;
- }
- int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp)
- {
- struct stdio_dev *_dev;
- _dev = stdio_clone(dev);
- if (!_dev)
- return -ENODEV;
- list_add_tail(&_dev->list, &devs.list);
- if (devp)
- *devp = _dev;
- return 0;
- }
- int stdio_register(struct stdio_dev *dev)
- {
- return stdio_register_dev(dev, NULL);
- }
- int stdio_deregister_dev(struct stdio_dev *dev, int force)
- {
- struct list_head *pos;
- char temp_names[3][16];
- int i;
- /* get stdio devices (ListRemoveItem changes the dev list) */
- for (i = 0 ; i < MAX_FILES; i++) {
- if (stdio_devices[i] == dev) {
- if (force) {
- strcpy(temp_names[i], "nulldev");
- continue;
- }
- /* Device is assigned -> report error */
- return -EBUSY;
- }
- memcpy(&temp_names[i][0], stdio_devices[i]->name,
- sizeof(temp_names[i]));
- }
- list_del(&dev->list);
- free(dev);
- /* reassign device list */
- list_for_each(pos, &devs.list) {
- dev = list_entry(pos, struct stdio_dev, list);
- for (i = 0 ; i < MAX_FILES; i++) {
- if (strcmp(dev->name, temp_names[i]) == 0)
- stdio_devices[i] = dev;
- }
- }
- return 0;
- }
- int stdio_deregister(const char *devname, int force)
- {
- struct stdio_dev *dev;
- dev = stdio_get_by_name(devname);
- if (!dev) /* device not found */
- return -ENODEV;
- return stdio_deregister_dev(dev, force);
- }
- int stdio_init_tables(void)
- {
- #if defined(CONFIG_NEEDS_MANUAL_RELOC)
- /* already relocated for current ARM implementation */
- ulong relocation_offset = gd->reloc_off;
- int i;
- /* relocate device name pointers */
- for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
- stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
- relocation_offset);
- }
- #endif /* CONFIG_NEEDS_MANUAL_RELOC */
- /* Initialize the list */
- INIT_LIST_HEAD(&devs.list);
- return 0;
- }
- int stdio_add_devices(void)
- {
- struct udevice *dev;
- struct uclass *uc;
- int ret;
- if (IS_ENABLED(CONFIG_DM_KEYBOARD)) {
- /*
- * For now we probe all the devices here. At some point this
- * should be done only when the devices are required - e.g. we
- * have a list of input devices to start up in the stdin
- * environment variable. That work probably makes more sense
- * when stdio itself is converted to driver model.
- *
- * TODO(sjg@chromium.org): Convert changing
- * uclass_first_device() etc. to return the device even on
- * error. Then we could use that here.
- */
- ret = uclass_get(UCLASS_KEYBOARD, &uc);
- if (ret)
- return ret;
- /*
- * Don't report errors to the caller - assume that they are
- * non-fatal
- */
- uclass_foreach_dev(dev, uc) {
- ret = device_probe(dev);
- if (ret)
- printf("Failed to probe keyboard '%s'\n",
- dev->name);
- }
- }
- #ifdef CONFIG_SYS_I2C
- i2c_init_all();
- #endif
- if (IS_ENABLED(CONFIG_DM_VIDEO)) {
- /*
- * If the console setting is not in environment variables then
- * console_init_r() will not be calling iomux_doenv() (which
- * calls search_device()). So we will not dynamically add
- * devices by calling stdio_probe_device().
- *
- * So just probe all video devices now so that whichever one is
- * required will be available.
- */
- struct udevice *vdev;
- int ret;
- if (!IS_ENABLED(CONFIG_SYS_CONSOLE_IS_IN_ENV)) {
- for (ret = uclass_first_device(UCLASS_VIDEO, &vdev);
- vdev;
- ret = uclass_next_device(&vdev))
- ;
- if (ret)
- printf("%s: Video device failed (ret=%d)\n",
- __func__, ret);
- }
- if (IS_ENABLED(CONFIG_SPLASH_SCREEN) &&
- IS_ENABLED(CONFIG_CMD_BMP))
- splash_display();
- } else {
- if (IS_ENABLED(CONFIG_LCD))
- drv_lcd_init();
- if (IS_ENABLED(CONFIG_VIDEO) || IS_ENABLED(CONFIG_CFB_CONSOLE))
- drv_video_init();
- }
- #if defined(CONFIG_KEYBOARD) && !defined(CONFIG_DM_KEYBOARD)
- drv_keyboard_init();
- #endif
- drv_system_init();
- serial_stdio_init();
- #ifdef CONFIG_USB_TTY
- drv_usbtty_init();
- #endif
- if (IS_ENABLED(CONFIG_NETCONSOLE))
- drv_nc_init();
- #ifdef CONFIG_JTAG_CONSOLE
- drv_jtag_console_init();
- #endif
- if (IS_ENABLED(CONFIG_CBMEM_CONSOLE))
- cbmemc_init();
- return 0;
- }
- int stdio_init(void)
- {
- stdio_init_tables();
- stdio_add_devices();
- return 0;
- }
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