1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com> 4 */ 5 6 #include <common.h> 7 #include <debug_uart.h> 8 #include <linux/io.h> 9 #include <linux/serial_reg.h> 10 11 #include "../soc-info.h" 12 #include "debug-uart.h" 13 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 18 _debug_uart_putc(int c)19static void _debug_uart_putc(int c) 20 { 21 void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE; 22 23 while (!(readl(base + UNIPHIER_UART_LSR) & UART_LSR_THRE)) 24 ; 25 26 writel(c, base + UNIPHIER_UART_TX); 27 } 28 _debug_uart_init(void)29void _debug_uart_init(void) 30 { 31 void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE; 32 unsigned int divisor; 33 34 switch (uniphier_get_soc_id()) { 35 #if defined(CONFIG_ARCH_UNIPHIER_LD4) 36 case UNIPHIER_LD4_ID: 37 divisor = uniphier_ld4_debug_uart_init(); 38 break; 39 #endif 40 #if defined(CONFIG_ARCH_UNIPHIER_PRO4) 41 case UNIPHIER_PRO4_ID: 42 divisor = uniphier_pro4_debug_uart_init(); 43 break; 44 #endif 45 #if defined(CONFIG_ARCH_UNIPHIER_SLD8) 46 case UNIPHIER_SLD8_ID: 47 divisor = uniphier_sld8_debug_uart_init(); 48 break; 49 #endif 50 #if defined(CONFIG_ARCH_UNIPHIER_PRO5) 51 case UNIPHIER_PRO5_ID: 52 divisor = uniphier_pro5_debug_uart_init(); 53 break; 54 #endif 55 #if defined(CONFIG_ARCH_UNIPHIER_PXS2) 56 case UNIPHIER_PXS2_ID: 57 divisor = uniphier_pxs2_debug_uart_init(); 58 break; 59 #endif 60 #if defined(CONFIG_ARCH_UNIPHIER_LD6B) 61 case UNIPHIER_LD6B_ID: 62 divisor = uniphier_ld6b_debug_uart_init(); 63 break; 64 #endif 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(); 69 break; 70 #endif 71 default: 72 return; 73 } 74 75 writel(UART_LCR_WLEN8 << 8, base + UNIPHIER_UART_LCR_MCR); 76 77 writel(divisor, base + UNIPHIER_UART_LDR); 78 } 79 DEBUG_UART_FUNCS 80