1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
7 #include <debug_uart.h>
9 #include <linux/serial_reg.h>
11 #include "../soc-info.h"
12 #include "debug-uart.h"
14 #define UNIPHIER_UART_TX 0x00
15 #define UNIPHIER_UART_LCR_MCR 0x10
16 #define UNIPHIER_UART_LSR 0x14
17 #define UNIPHIER_UART_LDR 0x24
19 static void _debug_uart_putc(int c)
21 void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE;
23 while (!(readl(base + UNIPHIER_UART_LSR) & UART_LSR_THRE))
26 writel(c, base + UNIPHIER_UART_TX);
29 void _debug_uart_init(void)
31 void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE;
34 switch (uniphier_get_soc_id()) {
35 #if defined(CONFIG_ARCH_UNIPHIER_LD4)
37 divisor = uniphier_ld4_debug_uart_init();
40 #if defined(CONFIG_ARCH_UNIPHIER_PRO4)
41 case UNIPHIER_PRO4_ID:
42 divisor = uniphier_pro4_debug_uart_init();
45 #if defined(CONFIG_ARCH_UNIPHIER_SLD8)
46 case UNIPHIER_SLD8_ID:
47 divisor = uniphier_sld8_debug_uart_init();
50 #if defined(CONFIG_ARCH_UNIPHIER_PRO5)
51 case UNIPHIER_PRO5_ID:
52 divisor = uniphier_pro5_debug_uart_init();
55 #if defined(CONFIG_ARCH_UNIPHIER_PXS2)
56 case UNIPHIER_PXS2_ID:
57 divisor = uniphier_pxs2_debug_uart_init();
60 #if defined(CONFIG_ARCH_UNIPHIER_LD6B)
61 case UNIPHIER_LD6B_ID:
62 divisor = uniphier_ld6b_debug_uart_init();
65 #if defined(CONFIG_ARCH_UNIPHIER_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20)
66 case UNIPHIER_LD11_ID:
67 case UNIPHIER_LD20_ID:
68 divisor = uniphier_ld20_debug_uart_init();
75 writel(UART_LCR_WLEN8 << 8, base + UNIPHIER_UART_LCR_MCR);
77 writel(divisor, base + UNIPHIER_UART_LDR);