ar71xx: add AR933x specific early_printk support
SVN-Revision: 27055
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6b3ca9ef0b
commit
0bf4478d37
2 changed files with 62 additions and 5 deletions
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@ -1,7 +1,7 @@
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/*
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/*
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* Atheros AR71xx SoC early printk support
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* Atheros AR7xxx/AR9xxx SoC early printk support
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*
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*
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* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify it
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* This program is free software; you can redistribute it and/or modify it
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@ -9,19 +9,23 @@
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* by the Free Software Foundation.
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* by the Free Software Foundation.
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*/
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*/
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#include <linux/errno.h>
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#include <linux/io.h>
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#include <linux/io.h>
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#include <linux/serial_reg.h>
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#include <linux/serial_reg.h>
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#include <asm/addrspace.h>
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#include <asm/addrspace.h>
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#include <asm/mach-ar71xx/ar71xx.h>
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#include <asm/mach-ar71xx/ar71xx.h>
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static void __iomem *prom_uart_base;
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static void (*_putchar)(unsigned char);
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#define UART_READ(r) \
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#define UART_READ(r) \
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__raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
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__raw_readl(prom_uart_base + 4 * (r))
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#define UART_WRITE(r, v) \
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#define UART_WRITE(r, v) \
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__raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
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__raw_writel((v), prom_uart_base + 4 * (r))
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void prom_putchar(unsigned char ch)
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static void prom_putchar_ar71xx(unsigned char ch)
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{
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{
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while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0)
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while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0)
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;
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;
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@ -30,3 +34,53 @@ void prom_putchar(unsigned char ch)
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;
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;
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}
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}
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static void prom_putchar_ar933x(unsigned char ch)
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{
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while (((UART_READ(0)) & 0x200) == 0)
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;
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UART_WRITE(0, 0x200 | ch);
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while (((UART_READ(0)) & 0x200) == 0)
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;
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}
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static int prom_putchar_init(void)
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{
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if (_putchar)
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return 0;
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switch(ar71xx_soc) {
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case AR71XX_SOC_AR7130:
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case AR71XX_SOC_AR7141:
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case AR71XX_SOC_AR7161:
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case AR71XX_SOC_AR7240:
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case AR71XX_SOC_AR7241:
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case AR71XX_SOC_AR7242:
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case AR71XX_SOC_AR9130:
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case AR71XX_SOC_AR9132:
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case AR71XX_SOC_AR9341:
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case AR71XX_SOC_AR9342:
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case AR71XX_SOC_AR9344:
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prom_uart_base = (void __iomem *) KSEG1ADDR(AR71XX_UART_BASE);
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_putchar = prom_putchar_ar71xx;
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break;
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case AR71XX_SOC_AR9330:
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case AR71XX_SOC_AR9331:
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prom_uart_base = (void __iomem *) KSEG1ADDR(AR933X_UART_BASE);
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_putchar = prom_putchar_ar933x;
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break;
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default:
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return -ENODEV;
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}
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return 0;
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}
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void prom_putchar(unsigned char ch)
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{
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if (prom_putchar_init())
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return;
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_putchar(ch);
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}
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@ -70,6 +70,9 @@
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#define AR91XX_WMAC_BASE (AR71XX_APB_BASE + 0x000C0000)
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#define AR91XX_WMAC_BASE (AR71XX_APB_BASE + 0x000C0000)
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#define AR91XX_WMAC_SIZE 0x30000
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#define AR91XX_WMAC_SIZE 0x30000
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#define AR933X_UART_BASE (AR71XX_APB_BASE + 0x00020000)
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#define AR933X_UART_SIZE 0x14
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#define AR934X_WMAC_BASE (AR71XX_APB_BASE + 0x00100000)
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#define AR934X_WMAC_BASE (AR71XX_APB_BASE + 0x00100000)
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#define AR934X_WMAC_SIZE 0x20000
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#define AR934X_WMAC_SIZE 0x20000
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