u-boot/common/stdio.c
Simon Glass b206cd7372 dm: stdio: Plumb in the new keyboard uclass
When driver model is used for keyboards we must scan the available keyboards
and register them with stdio. Add code to do this.

At some point (once LCD/video is converted) we should be able to convert
stdio to driver model and avoid these dual data structures.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2015-11-19 20:13:40 -07:00

320 lines
6.6 KiB
C

/*
* 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
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <stdarg.h>
#include <malloc.h>
#include <stdio_dev.h>
#include <serial.h>
#ifdef CONFIG_LOGBUFFER
#include <logbuff.h>
#endif
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
#include <i2c.h>
#endif
#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" };
#if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV)
#define CONFIG_SYS_DEVICE_NULLDEV 1
#endif
#ifdef CONFIG_SYS_STDIO_DEREGISTER
#define CONFIG_SYS_DEVICE_NULLDEV 1
#endif
#ifdef CONFIG_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;
}
#endif
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);
#ifdef CONFIG_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);
#endif
}
/**************************************************************************
* DEVICES
**************************************************************************
*/
struct list_head* stdio_get_list(void)
{
return &(devs.list);
}
struct stdio_dev* stdio_get_by_name(const char *name)
{
struct list_head *pos;
struct stdio_dev *dev;
if(!name)
return NULL;
list_for_each(pos, &(devs.list)) {
dev = list_entry(pos, struct stdio_dev, list);
if(strcmp(dev->name, name) == 0)
return dev;
}
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);
}
/* deregister the device "devname".
* returns 0 if success, -1 if device is assigned and 1 if devname not found
*/
#ifdef CONFIG_SYS_STDIO_DEREGISTER
int stdio_deregister_dev(struct stdio_dev *dev, int force)
{
int l;
struct list_head *pos;
char temp_names[3][16];
/* get stdio devices (ListRemoveItem changes the dev list) */
for (l=0 ; l< MAX_FILES; l++) {
if (stdio_devices[l] == dev) {
if (force) {
strcpy(temp_names[l], "nulldev");
continue;
}
/* Device is assigned -> report error */
return -1;
}
memcpy (&temp_names[l][0],
stdio_devices[l]->name,
sizeof(temp_names[l]));
}
list_del(&(dev->list));
free(dev);
/* reassign Device list */
list_for_each(pos, &(devs.list)) {
dev = list_entry(pos, struct stdio_dev, list);
for (l=0 ; l< MAX_FILES; l++) {
if(strcmp(dev->name, temp_names[l]) == 0)
stdio_devices[l] = 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);
}
#endif /* CONFIG_SYS_STDIO_DEREGISTER */
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)
{
#ifdef CONFIG_DM_KEYBOARD
struct udevice *dev;
struct uclass *uc;
int ret;
/*
* 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);
}
#endif
#ifdef CONFIG_SYS_I2C
i2c_init_all();
#else
#if defined(CONFIG_HARD_I2C)
i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#endif
#endif
#ifdef CONFIG_LCD
drv_lcd_init ();
#endif
#if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
drv_video_init ();
#endif
#if defined(CONFIG_KEYBOARD) && !defined(CONFIG_DM_KEYBOARD)
drv_keyboard_init ();
#endif
#ifdef CONFIG_LOGBUFFER
drv_logbuff_init ();
#endif
drv_system_init ();
serial_stdio_init ();
#ifdef CONFIG_USB_TTY
drv_usbtty_init ();
#endif
#ifdef CONFIG_NETCONSOLE
drv_nc_init ();
#endif
#ifdef CONFIG_JTAG_CONSOLE
drv_jtag_console_init ();
#endif
#ifdef CONFIG_CBMEM_CONSOLE
cbmemc_init();
#endif
return 0;
}
int stdio_init(void)
{
stdio_init_tables();
stdio_add_devices();
return 0;
}