]>
git.ipfire.org Git - people/ms/u-boot.git/blob - arch/arm/mach-uniphier/debug-uart/debug-uart.c
2 * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
4 * SPDX-License-Identifier: GPL-2.0+
8 #include <debug_uart.h>
10 #include <linux/serial_reg.h>
12 #include "../soc-info.h"
13 #include "debug-uart.h"
15 #define UNIPHIER_UART_TX 0x00
16 #define UNIPHIER_UART_LCR_MCR 0x10
17 #define UNIPHIER_UART_LSR 0x14
18 #define UNIPHIER_UART_LDR 0x24
20 static void _debug_uart_putc(int c
)
22 void __iomem
*base
= (void __iomem
*)CONFIG_DEBUG_UART_BASE
;
24 while (!(readl(base
+ UNIPHIER_UART_LSR
) & UART_LSR_THRE
))
27 writel(c
, base
+ UNIPHIER_UART_TX
);
30 void _debug_uart_init(void)
32 void __iomem
*base
= (void __iomem
*)CONFIG_DEBUG_UART_BASE
;
35 switch (uniphier_get_soc_id()) {
36 #if defined(CONFIG_ARCH_UNIPHIER_LD4)
38 divisor
= uniphier_ld4_debug_uart_init();
41 #if defined(CONFIG_ARCH_UNIPHIER_PRO4)
42 case UNIPHIER_PRO4_ID
:
43 divisor
= uniphier_pro4_debug_uart_init();
46 #if defined(CONFIG_ARCH_UNIPHIER_SLD8)
47 case UNIPHIER_SLD8_ID
:
48 divisor
= uniphier_sld8_debug_uart_init();
51 #if defined(CONFIG_ARCH_UNIPHIER_PRO5)
52 case UNIPHIER_PRO5_ID
:
53 divisor
= uniphier_pro5_debug_uart_init();
56 #if defined(CONFIG_ARCH_UNIPHIER_PXS2)
57 case UNIPHIER_PXS2_ID
:
58 divisor
= uniphier_pxs2_debug_uart_init();
61 #if defined(CONFIG_ARCH_UNIPHIER_LD6B)
62 case UNIPHIER_LD6B_ID
:
63 divisor
= uniphier_ld6b_debug_uart_init();
66 #if defined(CONFIG_ARCH_UNIPHIER_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20)
67 case UNIPHIER_LD11_ID
:
68 case UNIPHIER_LD20_ID
:
69 divisor
= uniphier_ld20_debug_uart_init();
76 writel(UART_LCR_WLEN8
<< 8, base
+ UNIPHIER_UART_LCR_MCR
);
78 writel(divisor
, base
+ UNIPHIER_UART_LDR
);