ar71xx: add latch handling code for the RB750

SVN-Revision: 20050

target/linux/ar71xx/files/arch/mips/ar71xx/mach-rb750.c

@@ -9,10 +9,60 @@
  */
 
 #include <asm/mach-ar71xx/ar71xx.h>
+#include <asm/mach-ar71xx/mach-rb750.h>
 
 #include "machtype.h"
 #include "dev-ap91-eth.h"
 
+int rb750_latch_change(u32 mask_clr, u32 mask_set)
+{
+	static DEFINE_SPINLOCK(lock);
+	static u32 latch_set = RB750_LED_BITS | RB750_LVC573_LE;
+	static u32 latch_oe;
+	static u32 latch_clr;
+	unsigned long flags;
+	u32 t;
+	int ret = 0;
+
+	spin_lock_irqsave(&lock, flags);
+
+	if ((mask_clr & BIT(31)) != 0 &&
+	    (latch_set & RB750_LVC573_LE) == 0) {
+		goto unlock;
+	}
+
+	latch_set = (latch_set | mask_set) & ~mask_clr;
+	latch_clr = (latch_clr | mask_clr) & ~mask_set;
+
+	if (latch_oe == 0)
+		latch_oe = __raw_readl(ar71xx_gpio_base + GPIO_REG_OE);
+
+	if (likely(latch_set & RB750_LVC573_LE)) {
+		void __iomem *base = ar71xx_gpio_base;
+
+		t = __raw_readl(base + GPIO_REG_OE);
+		t |= mask_clr | latch_oe | mask_set;
+
+		__raw_writel(t, base + GPIO_REG_OE);
+		__raw_writel(latch_clr, base + GPIO_REG_CLEAR);
+		__raw_writel(latch_set, base + GPIO_REG_SET);
+	} else if (mask_clr & RB750_LVC573_LE) {
+		void __iomem *base = ar71xx_gpio_base;
+
+		latch_oe = __raw_readl(base + GPIO_REG_OE);
+		__raw_writel(RB750_LVC573_LE, base + GPIO_REG_CLEAR);
+		/* flush write */
+		__raw_readl(base + GPIO_REG_CLEAR);
+	}
+
+	ret = 1;
+
+ unlock:
+	spin_unlock_irqrestore(&lock, flags);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(rb750_latch_change);
+
 static void __init rb750_setup(void)
 {
 	ap91_eth_init(NULL);

target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/mach-rb750.h

@@ -0,0 +1,54 @@
+/*
+ *  MikroTik RouterBOARD 750 definitions
+ *
+ *  Copyright (C) 2010 Gabor Juhos <[email protected]>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+#ifndef _MACH_RB750_H
+#define _MACH_RB750_H
+
+#include <linux/bitops.h>
+
+#define RB750_GPIO_LVC573_LE	0	/* Latch enable on LVC573 */
+#define RB750_GPIO_NAND_IO0	1	/* NAND I/O 0 */
+#define RB750_GPIO_NAND_IO1	2	/* NAND I/O 1 */
+#define RB750_GPIO_NAND_IO2	3	/* NAND I/O 2 */
+#define RB750_GPIO_NAND_IO3	4	/* NAND I/O 3 */
+#define RB750_GPIO_NAND_IO4	5	/* NAND I/O 4 */
+#define RB750_GPIO_NAND_IO5	6	/* NAND I/O 5 */
+#define RB750_GPIO_NAND_IO6	7	/* NAND I/O 6 */
+#define RB750_GPIO_NAND_IO7	8	/* NAND I/O 7 */
+#define RB750_GPIO_NAND_NCE	11	/* NAND Chip Enable (active low) */
+#define RB750_GPIO_NAND_RDY	12	/* NAND Ready */
+#define RB750_GPIO_NAND_CLE	14	/* NAND Command Latch Enable */
+#define RB750_GPIO_NAND_ALE	15	/* NAND Address Latch Enable */
+#define RB750_GPIO_NAND_NRE	16	/* NAND Read Enable (active low) */
+#define RB750_GPIO_NAND_NWE	17	/* NAND Write Enable (active low) */
+
+#define RB750_GPIO_BTN_RESET	1
+#define RB750_GPIO_SPI_CS0	2
+#define RB750_GPIO_LED_ACT	12
+#define RB750_GPIO_LED_PORT1	13
+#define RB750_GPIO_LED_PORT2	14
+#define RB750_GPIO_LED_PORT3	15
+#define RB750_GPIO_LED_PORT4	16
+#define RB750_GPIO_LED_PORT5	17
+
+#define RB750_LED_ACT		BIT(RB750_GPIO_LED_ACT)
+#define RB750_LED_PORT1		BIT(RB750_GPIO_LED_PORT1)
+#define RB750_LED_PORT2		BIT(RB750_GPIO_LED_PORT2)
+#define RB750_LED_PORT3		BIT(RB750_GPIO_LED_PORT3)
+#define RB750_LED_PORT4		BIT(RB750_GPIO_LED_PORT4)
+#define RB750_LED_PORT5		BIT(RB750_GPIO_LED_PORT5)
+
+#define RB750_LVC573_LE		BIT(RB750_GPIO_LVC573_LE)
+
+#define RB750_LED_BITS	(RB750_LED_PORT1 | RB750_LED_PORT2 | RB750_LED_PORT3 | \
+			 RB750_LED_PORT4 | RB750_LED_PORT5 | RB750_LED_ACT)
+
+int rb750_latch_change(u32 mask_clr, u32 mask_set);
+
+#endif /* _MACH_RB750_H */