diff options
Diffstat (limited to 'arch/arm/mach-uniphier/debug-uart/debug-uart.c')
| -rw-r--r-- | arch/arm/mach-uniphier/debug-uart/debug-uart.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/debug-uart/debug-uart.c b/arch/arm/mach-uniphier/debug-uart/debug-uart.c new file mode 100644 index 0000000000..d884785acb --- /dev/null +++ b/arch/arm/mach-uniphier/debug-uart/debug-uart.c @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <debug_uart.h> +#include <linux/io.h> +#include <linux/serial_reg.h> + +#include "../soc-info.h" +#include "debug-uart.h" + +#define UNIPHIER_UART_TX 0x00 +#define UNIPHIER_UART_LCR_MCR 0x10 +#define UNIPHIER_UART_LSR 0x14 +#define UNIPHIER_UART_LDR 0x24 + +static void _debug_uart_putc(int c) +{ + void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE; + + while (!(readl(base + UNIPHIER_UART_LSR) & UART_LSR_THRE)) + ; + + writel(c, base + UNIPHIER_UART_TX); +} + +void _debug_uart_init(void) +{ + void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE; + unsigned int divisor; + + switch (uniphier_get_soc_type()) { +#if defined(CONFIG_ARCH_UNIPHIER_SLD3) + case SOC_UNIPHIER_SLD3: + divisor = uniphier_sld3_debug_uart_init(); + break; +#endif +#if defined(CONFIG_ARCH_UNIPHIER_LD4) + case SOC_UNIPHIER_LD4: + divisor = uniphier_ld4_debug_uart_init(); + break; +#endif +#if defined(CONFIG_ARCH_UNIPHIER_PRO4) + case SOC_UNIPHIER_PRO4: + divisor = uniphier_pro4_debug_uart_init(); + break; +#endif +#if defined(CONFIG_ARCH_UNIPHIER_SLD8) + case SOC_UNIPHIER_SLD8: + divisor = uniphier_sld8_debug_uart_init(); + break; +#endif +#if defined(CONFIG_ARCH_UNIPHIER_PRO5) + case SOC_UNIPHIER_PRO5: + divisor = uniphier_pro5_debug_uart_init(); + break; +#endif +#if defined(CONFIG_ARCH_UNIPHIER_PXS2) + case SOC_UNIPHIER_PXS2: + divisor = uniphier_pxs2_debug_uart_init(); + break; +#endif +#if defined(CONFIG_ARCH_UNIPHIER_LD6B) + case SOC_UNIPHIER_LD6B: + divisor = uniphier_ld6b_debug_uart_init(); + break; +#endif +#if defined(CONFIG_ARCH_UNIPHIER_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20) + case SOC_UNIPHIER_LD11: + case SOC_UNIPHIER_LD20: + divisor = uniphier_ld20_debug_uart_init(); + break; +#endif + default: + return; + } + + writel(UART_LCR_WLEN8 << 8, base + UNIPHIER_UART_LCR_MCR); + + writel(divisor, base + UNIPHIER_UART_LDR); +} +DEBUG_UART_FUNCS |