1 /* 2 * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <debug_uart.h> 9 #include <linux/io.h> 10 #include <linux/serial_reg.h> 11 12 #include "../soc-info.h" 13 #include "debug-uart.h" 14 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 19 20 static void _debug_uart_putc(int c) 21 { 22 void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE; 23 24 while (!(readl(base + UNIPHIER_UART_LSR) & UART_LSR_THRE)) 25 ; 26 27 writel(c, base + UNIPHIER_UART_TX); 28 } 29 30 void _debug_uart_init(void) 31 { 32 void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE; 33 unsigned int divisor; 34 35 switch (uniphier_get_soc_id()) { 36 #if defined(CONFIG_ARCH_UNIPHIER_LD4) 37 case UNIPHIER_LD4_ID: 38 divisor = uniphier_ld4_debug_uart_init(); 39 break; 40 #endif 41 #if defined(CONFIG_ARCH_UNIPHIER_PRO4) 42 case UNIPHIER_PRO4_ID: 43 divisor = uniphier_pro4_debug_uart_init(); 44 break; 45 #endif 46 #if defined(CONFIG_ARCH_UNIPHIER_SLD8) 47 case UNIPHIER_SLD8_ID: 48 divisor = uniphier_sld8_debug_uart_init(); 49 break; 50 #endif 51 #if defined(CONFIG_ARCH_UNIPHIER_PRO5) 52 case UNIPHIER_PRO5_ID: 53 divisor = uniphier_pro5_debug_uart_init(); 54 break; 55 #endif 56 #if defined(CONFIG_ARCH_UNIPHIER_PXS2) 57 case UNIPHIER_PXS2_ID: 58 divisor = uniphier_pxs2_debug_uart_init(); 59 break; 60 #endif 61 #if defined(CONFIG_ARCH_UNIPHIER_LD6B) 62 case UNIPHIER_LD6B_ID: 63 divisor = uniphier_ld6b_debug_uart_init(); 64 break; 65 #endif 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(); 70 break; 71 #endif 72 default: 73 return; 74 } 75 76 writel(UART_LCR_WLEN8 << 8, base + UNIPHIER_UART_LCR_MCR); 77 78 writel(divisor, base + UNIPHIER_UART_LDR); 79 } 80 DEBUG_UART_FUNCS 81