mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 02:51:00 +00:00
fc2b399ac0
Add support for CDC ACM using the new UDC and gadget API. This protocol can be used for serial over USB data transfer and is widely supported by various OS (GNU/Linux, MS-Windows, OSX...). The usual purpose of such link is to access device debug console and can be useful for products not exposing regular UART to the user. A default stdio device named 'usbacm' is created, and can be used to redirect console to USB link over CDC ACM: > setenv stdin usbacm; setenv stdout usbacm Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
404 lines
9.4 KiB
C
404 lines
9.4 KiB
C
// 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 <asm/global_data.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" };
|
|
|
|
int stdio_file_to_flags(const int file)
|
|
{
|
|
switch (file) {
|
|
case stdin:
|
|
return DEV_FLAGS_INPUT;
|
|
case stdout:
|
|
case stderr:
|
|
return DEV_FLAGS_OUTPUT;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(SYS_DEVICE_NULLDEV)
|
|
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 nulldev_register(void)
|
|
{
|
|
struct stdio_dev dev;
|
|
|
|
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);
|
|
}
|
|
#else
|
|
static inline void nulldev_register(void) {}
|
|
#endif /* SYS_DEVICE_NULLDEV */
|
|
|
|
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);
|
|
|
|
nulldev_register();
|
|
}
|
|
|
|
/**************************************************************************
|
|
* 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() -> console_search_dev() -> 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_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);
|
|
}
|
|
}
|
|
#if CONFIG_IS_ENABLED(SYS_I2C_LEGACY)
|
|
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 console_search_dev()). 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) ||
|
|
IS_ENABLED(CONFIG_VIDEO_VCXK))
|
|
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
|
|
#ifdef CONFIG_USB_FUNCTION_ACM
|
|
drv_usbacm_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;
|
|
}
|