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https://github.com/AsahiLinux/u-boot
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3232487daf
Rename search_device() to console_search_dev() since it's in console.h. Suggested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Simon Glass <sjg@chromium.org>
390 lines
9.1 KiB
C
390 lines
9.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2009 Sergey Kubushyn <ksi@koi8.net>
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*
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* Changes for multibus/multiadapter I2C support.
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*
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* (C) Copyright 2000
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* Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
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*/
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#include <config.h>
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <stdarg.h>
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#include <malloc.h>
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#include <stdio_dev.h>
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#include <serial.h>
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#include <splash.h>
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#include <i2c.h>
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#include <dm/device-internal.h>
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DECLARE_GLOBAL_DATA_PTR;
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static struct stdio_dev devs;
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struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
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char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };
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static void nulldev_putc(struct stdio_dev *dev, const char c)
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{
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/* nulldev is empty! */
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}
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static void nulldev_puts(struct stdio_dev *dev, const char *s)
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{
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/* nulldev is empty! */
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}
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static int nulldev_input(struct stdio_dev *dev)
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{
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/* nulldev is empty! */
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return 0;
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}
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static void stdio_serial_putc(struct stdio_dev *dev, const char c)
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{
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serial_putc(c);
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}
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static void stdio_serial_puts(struct stdio_dev *dev, const char *s)
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{
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serial_puts(s);
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}
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static int stdio_serial_getc(struct stdio_dev *dev)
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{
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return serial_getc();
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}
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static int stdio_serial_tstc(struct stdio_dev *dev)
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{
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return serial_tstc();
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}
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/**************************************************************************
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* SYSTEM DRIVERS
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**************************************************************************
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*/
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static void drv_system_init (void)
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{
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struct stdio_dev dev;
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memset (&dev, 0, sizeof (dev));
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strcpy (dev.name, "serial");
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dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
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dev.putc = stdio_serial_putc;
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dev.puts = stdio_serial_puts;
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dev.getc = stdio_serial_getc;
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dev.tstc = stdio_serial_tstc;
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stdio_register (&dev);
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if (CONFIG_IS_ENABLED(SYS_DEVICE_NULLDEV)) {
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memset(&dev, '\0', sizeof(dev));
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strcpy(dev.name, "nulldev");
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dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT;
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dev.putc = nulldev_putc;
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dev.puts = nulldev_puts;
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dev.getc = nulldev_input;
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dev.tstc = nulldev_input;
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stdio_register(&dev);
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}
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}
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/**************************************************************************
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* DEVICES
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**************************************************************************
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*/
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struct list_head* stdio_get_list(void)
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{
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return &devs.list;
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}
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/**
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* stdio_probe_device() - Find a device which provides the given stdio device
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*
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* This looks for a device of the given uclass which provides a particular
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* stdio device. It is currently really only useful for UCLASS_VIDEO.
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*
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* Ultimately we want to be able to probe a device by its stdio name. At
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* present devices register in their probe function (for video devices this
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* is done in vidconsole_post_probe()) and we don't know what name they will
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* use until they do so.
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* TODO(sjg@chromium.org): We should be able to determine the name before
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* probing, and probe the required device.
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*
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* @name: stdio device name (e.g. "vidconsole")
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* id: Uclass ID of device to look for (e.g. UCLASS_VIDEO)
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* @sdevp: Returns stdout device, if found, else NULL
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* @return 0 if found, -ENOENT if no device found with that name, other -ve
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* on other error
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*/
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static int stdio_probe_device(const char *name, enum uclass_id id,
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struct stdio_dev **sdevp)
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{
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struct stdio_dev *sdev;
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struct udevice *dev;
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int seq, ret;
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*sdevp = NULL;
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seq = trailing_strtoln(name, NULL);
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if (seq == -1)
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seq = 0;
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ret = uclass_get_device_by_seq(id, seq, &dev);
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if (ret == -ENODEV)
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ret = uclass_first_device_err(id, &dev);
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if (ret) {
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debug("No %s device for seq %d (%s)\n", uclass_get_name(id),
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seq, name);
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return ret;
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}
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/* The device should be be the last one registered */
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sdev = list_empty(&devs.list) ? NULL :
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list_last_entry(&devs.list, struct stdio_dev, list);
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if (!sdev || strcmp(sdev->name, name)) {
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debug("Device '%s' did not register with stdio as '%s'\n",
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dev->name, name);
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return -ENOENT;
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}
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*sdevp = sdev;
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return 0;
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}
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struct stdio_dev *stdio_get_by_name(const char *name)
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{
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struct list_head *pos;
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struct stdio_dev *sdev;
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if (!name)
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return NULL;
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list_for_each(pos, &devs.list) {
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sdev = list_entry(pos, struct stdio_dev, list);
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if (strcmp(sdev->name, name) == 0)
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return sdev;
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}
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if (IS_ENABLED(CONFIG_DM_VIDEO)) {
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/*
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* We did not find a suitable stdio device. If there is a video
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* driver with a name starting with 'vidconsole', we can try
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* probing that in the hope that it will produce the required
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* stdio device.
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*
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* This function is sometimes called with the entire value of
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* 'stdout', which may include a list of devices separate by
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* commas. Obviously this is not going to work, so we ignore
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* that case. The call path in that case is
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* console_init_r() -> console_search_dev() -> stdio_get_by_name()
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*/
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if (!strncmp(name, "vidconsole", 10) && !strchr(name, ',') &&
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!stdio_probe_device(name, UCLASS_VIDEO, &sdev))
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return sdev;
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}
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return NULL;
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}
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struct stdio_dev *stdio_clone(struct stdio_dev *dev)
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{
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struct stdio_dev *_dev;
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if (!dev)
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return NULL;
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_dev = calloc(1, sizeof(struct stdio_dev));
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if (!_dev)
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return NULL;
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memcpy(_dev, dev, sizeof(struct stdio_dev));
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return _dev;
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}
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int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp)
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{
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struct stdio_dev *_dev;
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_dev = stdio_clone(dev);
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if (!_dev)
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return -ENODEV;
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list_add_tail(&_dev->list, &devs.list);
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if (devp)
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*devp = _dev;
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return 0;
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}
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int stdio_register(struct stdio_dev *dev)
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{
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return stdio_register_dev(dev, NULL);
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}
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int stdio_deregister_dev(struct stdio_dev *dev, int force)
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{
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struct list_head *pos;
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char temp_names[3][16];
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int i;
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/* get stdio devices (ListRemoveItem changes the dev list) */
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for (i = 0 ; i < MAX_FILES; i++) {
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if (stdio_devices[i] == dev) {
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if (force) {
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strcpy(temp_names[i], "nulldev");
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continue;
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}
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/* Device is assigned -> report error */
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return -EBUSY;
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}
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memcpy(&temp_names[i][0], stdio_devices[i]->name,
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sizeof(temp_names[i]));
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}
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list_del(&dev->list);
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free(dev);
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/* reassign device list */
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list_for_each(pos, &devs.list) {
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dev = list_entry(pos, struct stdio_dev, list);
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for (i = 0 ; i < MAX_FILES; i++) {
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if (strcmp(dev->name, temp_names[i]) == 0)
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stdio_devices[i] = dev;
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}
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}
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return 0;
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}
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int stdio_deregister(const char *devname, int force)
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{
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struct stdio_dev *dev;
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dev = stdio_get_by_name(devname);
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if (!dev) /* device not found */
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return -ENODEV;
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return stdio_deregister_dev(dev, force);
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}
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int stdio_init_tables(void)
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{
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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/* already relocated for current ARM implementation */
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ulong relocation_offset = gd->reloc_off;
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int i;
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/* relocate device name pointers */
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for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
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stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
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relocation_offset);
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}
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#endif /* CONFIG_NEEDS_MANUAL_RELOC */
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/* Initialize the list */
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INIT_LIST_HEAD(&devs.list);
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return 0;
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}
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int stdio_add_devices(void)
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{
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struct udevice *dev;
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struct uclass *uc;
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int ret;
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if (IS_ENABLED(CONFIG_DM_KEYBOARD)) {
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/*
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* For now we probe all the devices here. At some point this
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* should be done only when the devices are required - e.g. we
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* have a list of input devices to start up in the stdin
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* environment variable. That work probably makes more sense
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* when stdio itself is converted to driver model.
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*
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* TODO(sjg@chromium.org): Convert changing
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* uclass_first_device() etc. to return the device even on
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* error. Then we could use that here.
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*/
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ret = uclass_get(UCLASS_KEYBOARD, &uc);
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if (ret)
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return ret;
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/*
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* Don't report errors to the caller - assume that they are
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* non-fatal
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*/
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uclass_foreach_dev(dev, uc) {
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ret = device_probe(dev);
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if (ret)
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printf("Failed to probe keyboard '%s'\n",
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dev->name);
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}
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}
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#ifdef CONFIG_SYS_I2C
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i2c_init_all();
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#endif
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if (IS_ENABLED(CONFIG_DM_VIDEO)) {
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/*
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* If the console setting is not in environment variables then
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* console_init_r() will not be calling iomux_doenv() (which
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* calls console_search_dev()). So we will not dynamically add
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* devices by calling stdio_probe_device().
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*
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* So just probe all video devices now so that whichever one is
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* required will be available.
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*/
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struct udevice *vdev;
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int ret;
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if (!IS_ENABLED(CONFIG_SYS_CONSOLE_IS_IN_ENV)) {
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for (ret = uclass_first_device(UCLASS_VIDEO, &vdev);
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vdev;
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ret = uclass_next_device(&vdev))
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;
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if (ret)
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printf("%s: Video device failed (ret=%d)\n",
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__func__, ret);
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}
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if (IS_ENABLED(CONFIG_SPLASH_SCREEN) &&
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IS_ENABLED(CONFIG_CMD_BMP))
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splash_display();
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} else {
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if (IS_ENABLED(CONFIG_LCD))
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drv_lcd_init();
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if (IS_ENABLED(CONFIG_VIDEO) ||
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IS_ENABLED(CONFIG_CFB_CONSOLE) ||
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IS_ENABLED(CONFIG_VIDEO_VCXK))
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drv_video_init();
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}
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#if defined(CONFIG_KEYBOARD) && !defined(CONFIG_DM_KEYBOARD)
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drv_keyboard_init();
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#endif
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drv_system_init();
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serial_stdio_init();
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#ifdef CONFIG_USB_TTY
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drv_usbtty_init();
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#endif
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if (IS_ENABLED(CONFIG_NETCONSOLE))
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drv_nc_init();
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#ifdef CONFIG_JTAG_CONSOLE
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drv_jtag_console_init();
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#endif
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if (IS_ENABLED(CONFIG_CBMEM_CONSOLE))
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cbmemc_init();
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return 0;
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}
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int stdio_init(void)
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{
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stdio_init_tables();
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stdio_add_devices();
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return 0;
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}
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