X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=target%2Flinux%2Far71xx%2Ffiles%2Farch%2Fmips%2Far71xx%2Fearly_printk.c;h=c85a04d2c1b162cf347afd7fad608f8ad7187914;hb=11a837ce029534fc38f6deb2a2f31d80fe5a1f7f;hp=76f69c562b8c4d563e95938376854cc6e82427a2;hpb=6be076283d2e559a33f5744b420c30d56f9930d6;p=openwrt.git

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 76f69c562b..c85a04d2c1 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
@@ -9,24 +9,88 @@
  *  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>
+#include <asm/mach-ar71xx/ar933x_uart.h>
 
-#define UART_READ(r) \
-	__raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
+static void (*_prom_putchar) (unsigned char);
 
-#define UART_WRITE(r, v) \
-	__raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
+static inline void prom_putchar_wait(void __iomem *reg, u32 mask, u32 val)
+{
+	u32 t;
 
-void prom_putchar(unsigned char ch)
+	do {
+		t = __raw_readl(reg);
+		if ((t & mask) == val)
+			break;
+	} while (1);
+}
+
+static void prom_putchar_ar71xx(unsigned char ch)
+{
+	void __iomem *base = (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE));
+
+	prom_putchar_wait(base + UART_LSR * 4, UART_LSR_THRE, UART_LSR_THRE);
+	__raw_writel(ch, base + UART_TX * 4);
+	prom_putchar_wait(base + UART_LSR * 4, UART_LSR_THRE, UART_LSR_THRE);
+}
+
+static void prom_putchar_ar933x(unsigned char ch)
+{
+	void __iomem *base = (void __iomem *)(KSEG1ADDR(AR933X_UART_BASE));
+
+	prom_putchar_wait(base + AR933X_UART_DATA_REG, AR933X_UART_DATA_TX_CSR,
+			  AR933X_UART_DATA_TX_CSR);
+	__raw_writel(AR933X_UART_DATA_TX_CSR | ch, base + AR933X_UART_DATA_REG);
+	prom_putchar_wait(base + AR933X_UART_DATA_REG, AR933X_UART_DATA_TX_CSR,
+			  AR933X_UART_DATA_TX_CSR);
+}
+
+static void prom_putchar_dummy(unsigned char ch)
 {
-	while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0)
-		;
-	UART_WRITE(UART_TX, ch);
-	while (((UART_READ(UART_LSR)) & UART_LSR_THRE) == 0)
-		;
+	/* nothing to do */
 }
 
+static void prom_putchar_init(void)
+{
+	void __iomem *base;
+	u32 id;
+
+	base = (void __iomem *)(KSEG1ADDR(AR71XX_RESET_BASE));
+	id = __raw_readl(base + AR71XX_RESET_REG_REV_ID);
+	id &= REV_ID_MAJOR_MASK;
+
+	switch (id) {
+	case REV_ID_MAJOR_AR71XX:
+	case REV_ID_MAJOR_AR7240:
+	case REV_ID_MAJOR_AR7241:
+	case REV_ID_MAJOR_AR7242:
+	case REV_ID_MAJOR_AR913X:
+	case REV_ID_MAJOR_AR9341:
+	case REV_ID_MAJOR_AR9342:
+	case REV_ID_MAJOR_AR9344:
+		_prom_putchar = prom_putchar_ar71xx;
+		break;
+
+	case REV_ID_MAJOR_AR9330:
+	case REV_ID_MAJOR_AR9331:
+		_prom_putchar = prom_putchar_ar933x;
+		break;
+
+	default:
+		_prom_putchar = prom_putchar_dummy;
+		break;
+	}
+}
+
+void prom_putchar(unsigned char ch)
+{
+	if (!_prom_putchar)
+		prom_putchar_init();
+
+	_prom_putchar(ch);
+}