diff options
| author | Gabor Juhos <juhosg@openwrt.org> | 2011-05-31 22:53:27 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2011-05-31 22:53:27 +0000 |
| commit | 0bf4478d3784f4c22e22367487c60cdff756ab54 (patch) | |
| tree | 2c9292af11139502bc0622fd3bc0982eb787c7d3 /target/linux/ar71xx/files | |
| parent | 6b3ca9ef0b296afafcfff34d0a1694a606f52b45 (diff) | |
| download | mtk-20170518-0bf4478d3784f4c22e22367487c60cdff756ab54.zip mtk-20170518-0bf4478d3784f4c22e22367487c60cdff756ab54.tar.gz mtk-20170518-0bf4478d3784f4c22e22367487c60cdff756ab54.tar.bz2 | |
ar71xx: add AR933x specific early_printk support
SVN-Revision: 27055
Diffstat (limited to 'target/linux/ar71xx/files')
| -rw-r--r-- | target/linux/ar71xx/files/arch/mips/ar71xx/early_printk.c | 64 | ||||
| -rw-r--r-- | target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h | 3 |
2 files changed, 62 insertions, 5 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/early_printk.c b/target/linux/ar71xx/files/arch/mips/ar71xx/early_printk.c index 76f69c5..f84c76d 100644 --- a/target/linux/ar71xx/files/arch/mips/ar71xx/early_printk.c +++ b/target/linux/ar71xx/files/arch/mips/ar71xx/early_printk.c @@ -1,7 +1,7 @@ /* - * Atheros AR71xx SoC early printk support + * Atheros AR7xxx/AR9xxx SoC early printk support * - * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> * * This program is free software; you can redistribute it and/or modify it @@ -9,19 +9,23 @@ * by the Free Software Foundation. */ +#include <linux/errno.h> #include <linux/io.h> #include <linux/serial_reg.h> #include <asm/addrspace.h> #include <asm/mach-ar71xx/ar71xx.h> +static void __iomem *prom_uart_base; +static void (*_putchar)(unsigned char); + #define UART_READ(r) \ - __raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r))) + __raw_readl(prom_uart_base + 4 * (r)) #define UART_WRITE(r, v) \ - __raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r))) + __raw_writel((v), prom_uart_base + 4 * (r)) -void prom_putchar(unsigned char ch) +static void prom_putchar_ar71xx(unsigned char ch) { while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0) ; @@ -30,3 +34,53 @@ void prom_putchar(unsigned char ch) ; } +static void prom_putchar_ar933x(unsigned char ch) +{ + while (((UART_READ(0)) & 0x200) == 0) + ; + UART_WRITE(0, 0x200 | ch); + while (((UART_READ(0)) & 0x200) == 0) + ; +} + +static int prom_putchar_init(void) +{ + if (_putchar) + return 0; + + switch(ar71xx_soc) { + case AR71XX_SOC_AR7130: + case AR71XX_SOC_AR7141: + case AR71XX_SOC_AR7161: + case AR71XX_SOC_AR7240: + case AR71XX_SOC_AR7241: + case AR71XX_SOC_AR7242: + case AR71XX_SOC_AR9130: + case AR71XX_SOC_AR9132: + case AR71XX_SOC_AR9341: + case AR71XX_SOC_AR9342: + case AR71XX_SOC_AR9344: + prom_uart_base = (void __iomem *) KSEG1ADDR(AR71XX_UART_BASE); + _putchar = prom_putchar_ar71xx; + break; + + case AR71XX_SOC_AR9330: + case AR71XX_SOC_AR9331: + prom_uart_base = (void __iomem *) KSEG1ADDR(AR933X_UART_BASE); + _putchar = prom_putchar_ar933x; + break; + + default: + return -ENODEV; + } + + return 0; +} + +void prom_putchar(unsigned char ch) +{ + if (prom_putchar_init()) + return; + + _putchar(ch); +} diff --git a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h index 9dc15fe..47ad8a4 100644 --- a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h +++ b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h @@ -70,6 +70,9 @@ #define AR91XX_WMAC_BASE (AR71XX_APB_BASE + 0x000C0000) #define AR91XX_WMAC_SIZE 0x30000 +#define AR933X_UART_BASE (AR71XX_APB_BASE + 0x00020000) +#define AR933X_UART_SIZE 0x14 + #define AR934X_WMAC_BASE (AR71XX_APB_BASE + 0x00100000) #define AR934X_WMAC_SIZE 0x20000 |