Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * License.  See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <bcm63xx_io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/serial_bcm63xx.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) static void wait_xfered(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	/* wait for any previous char to be transmitted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		val = bcm_uart0_readl(UART_IR_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		if (val & UART_IR_STAT(UART_IR_TXEMPTY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	} while (1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) void prom_putchar(char c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	wait_xfered();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	bcm_uart0_writel(c, UART_FIFO_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	wait_xfered();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) }