From 7e970c18f85f99acc678d90128b6e01dce1bf273 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 01 Nov 2024 02:40:12 +0000
Subject: [PATCH] gmac get mac form eeprom
---
kernel/drivers/tty/serial/8250/8250_core.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 45 insertions(+), 0 deletions(-)
diff --git a/kernel/drivers/tty/serial/8250/8250_core.c b/kernel/drivers/tty/serial/8250/8250_core.c
index 00f6dc7..da7ba88 100644
--- a/kernel/drivers/tty/serial/8250/8250_core.c
+++ b/kernel/drivers/tty/serial/8250/8250_core.c
@@ -675,6 +675,48 @@
return -ENODEV;
}
+#ifdef CONFIG_RAW_PRINTK
+
+static void raw_write_char(struct uart_8250_port *up, int c)
+{
+ unsigned int status, tmout = 10000;
+
+ for (;;) {
+ status = serial_in(up, UART_LSR);
+ up->lsr_saved_flags |= status & LSR_SAVE_FLAGS;
+ if ((status & UART_LSR_THRE) == UART_LSR_THRE)
+ break;
+ if (--tmout == 0)
+ break;
+ cpu_relax();
+ }
+ serial_port_out(&up->port, UART_TX, c);
+}
+
+static void univ8250_console_write_raw(struct console *co, const char *s,
+ unsigned int count)
+{
+ struct uart_8250_port *up = &serial8250_ports[co->index];
+ unsigned int ier;
+
+ ier = serial_in(up, UART_IER);
+
+ if (up->capabilities & UART_CAP_UUE)
+ serial_out(up, UART_IER, UART_IER_UUE);
+ else
+ serial_out(up, UART_IER, 0);
+
+ while (count-- > 0) {
+ if (*s == '\n')
+ raw_write_char(up, '\r');
+ raw_write_char(up, *s++);
+ }
+
+ serial_out(up, UART_IER, ier);
+}
+
+#endif
+
static struct console univ8250_console = {
.name = "ttyS",
.write = univ8250_console_write,
@@ -682,6 +724,9 @@
.setup = univ8250_console_setup,
.exit = univ8250_console_exit,
.match = univ8250_console_match,
+#ifdef CONFIG_RAW_PRINTK
+ .write_raw = univ8250_console_write_raw,
+#endif
.flags = CON_PRINTBUFFER | CON_ANYTIME,
.index = -1,
.data = &serial8250_reg,
--
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