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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-11-16 GuEe-GUI first version
*/
#include <rtatomic.h>
#include <drivers/serial_dm.h>
static int uid_min = -1;
static volatile rt_atomic_t uid = 0;
int serial_dev_set_name(struct rt_serial_device *sdev)
{
int id = -1;
RT_ASSERT(sdev != RT_NULL);
#ifdef RT_USING_OFW
if (sdev->parent.ofw_node)
{
id = rt_ofw_get_alias_id(sdev->parent.ofw_node, "serial");
if (id < 0)
{
id = rt_ofw_get_alias_id(sdev->parent.ofw_node, "uart");
}
}
#endif /* RT_USING_OFW */
if (id < 0)
{
id = (int)rt_atomic_add(&uid, 1);
}
return rt_dm_dev_set_name(&sdev->parent, "uart%u", id);
}
static int serial_dm_naming_framework_init(void)
{
#ifdef RT_USING_OFW
uid_min = rt_ofw_get_alias_last_id("serial");
if (uid_min < 0)
{
uid_min = rt_ofw_get_alias_last_id("uart");
}
uid_min = uid_min < 0 ? 0 : (uid_min + 1);
rt_hw_atomic_store(&uid, uid_min);
#endif /* RT_USING_OFW */
return 0;
}
INIT_PLATFORM_EXPORT(serial_dm_naming_framework_init);
void *serial_base_from_args(char *str)
{
rt_ubase_t base = 0;
while (*str && !(*str == 'x' || *str == 'X'))
{
++str;
}
++str;
/* The str may get from bootargs that we need check it */
while (*str)
{
if ((*str >= 'a' && *str <= 'f') || (*str >= 'A' && *str <= 'F'))
{
base = (base << 4) | (((*str | ' ') - 'a') + 10);
}
else if (*str >= '0' && *str <= '9')
{
base = (base << 4) | (*str - '0');
}
else break;
++str;
}
return (void *)base;
}
struct serial_configure serial_cfg_from_args(char *_str)
{
char *str = _str;
struct serial_configure cfg = RT_SERIAL_CONFIG_DEFAULT;
/* Format baudrate/parity/bits/flow (BBBBPNF), Default is 115200n8 */
if (str && *str)
{
rt_uint32_t baudrate = 0;
/* BBBB is the speed */
while (*str && (*str >= '0' && *str <= '9'))
{
baudrate *= 10;
baudrate += *str - '0';
++str;
}
if (baudrate)
{
cfg.baud_rate = baudrate;
}
/* P is parity (n/o/e) */
switch (*str)
{
case 'n':
cfg.parity = PARITY_NONE;
break;
case 'o':
cfg.parity = PARITY_ODD;
break;
case 'e':
cfg.parity = PARITY_EVEN;
break;
default:
--str;
break;
}
++str;
/* N is number of bits */
if (*str && (*str >= '0' && *str <= '9'))
{
cfg.data_bits = *str - '0';
++str;
}
/* F is flow ontrol ('r' for RTS) */
if (*str)
{
cfg.flowcontrol = (*str == 'r' ? RT_SERIAL_FLOWCONTROL_CTSRTS : RT_SERIAL_FLOWCONTROL_NONE);
++str;
}
#ifdef RT_USING_OFW
if (*str == '\0')
{
const char earlycon_magic[] = { 'O', 'F', 'W', '\0' };
if (!rt_strcmp(++str, earlycon_magic))
{
/* Is OFW earlycon, we should ACK it */
rt_memset(str, 0, RT_ARRAY_SIZE(earlycon_magic));
}
}
#endif /* RT_USING_OFW */
}
return cfg;
}
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