Initial commit

target/linux/ar71xx/files/arch/mips/ath79/dev-nfc.c

@@ -0,0 +1,141 @@
+/*
+ *  Atheros AR934X SoCs built-in NAND flash controller support
+ *
+ *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/dma-mapping.h>
+#include <linux/etherdevice.h>
+#include <linux/platform_device.h>
+#include <linux/platform/ar934x_nfc.h>
+
+#include <asm/mach-ath79/ath79.h>
+#include <asm/mach-ath79/ar71xx_regs.h>
+
+#include "dev-nfc.h"
+
+static struct resource ath79_nfc_resources[2];
+static u64 ar934x_nfc_dmamask = DMA_BIT_MASK(32);
+static struct ar934x_nfc_platform_data ath79_nfc_data;
+
+static struct platform_device ath79_nfc_device = {
+	.name		= AR934X_NFC_DRIVER_NAME,
+	.id		= -1,
+	.resource	= ath79_nfc_resources,
+	.num_resources	= ARRAY_SIZE(ath79_nfc_resources),
+	.dev = {
+		.dma_mask = &ar934x_nfc_dmamask,
+		.coherent_dma_mask = DMA_BIT_MASK(32),
+		.platform_data = &ath79_nfc_data,
+	},
+};
+
+static void __init ath79_nfc_init_resource(struct resource res[2],
+					   unsigned long base,
+					   unsigned long size,
+					   int irq)
+{
+	memset(res, 0, sizeof(struct resource) * 2);
+
+	res[0].flags = IORESOURCE_MEM;
+	res[0].start = base;
+	res[0].end = base + size - 1;
+
+	res[1].flags = IORESOURCE_IRQ;
+	res[1].start = irq;
+	res[1].end = irq;
+}
+
+static void ar934x_nfc_hw_reset(bool active)
+{
+	if (active) {
+		ath79_device_reset_set(AR934X_RESET_NANDF);
+		udelay(100);
+
+		ath79_device_reset_set(AR934X_RESET_ETH_SWITCH_ANALOG);
+		udelay(250);
+	} else {
+		ath79_device_reset_clear(AR934X_RESET_ETH_SWITCH_ANALOG);
+		udelay(250);
+
+		ath79_device_reset_clear(AR934X_RESET_NANDF);
+		udelay(100);
+	}
+}
+
+static void ar934x_nfc_setup(void)
+{
+	ath79_nfc_data.hw_reset = ar934x_nfc_hw_reset;
+
+	ath79_nfc_init_resource(ath79_nfc_resources,
+				AR934X_NFC_BASE, AR934X_NFC_SIZE,
+				ATH79_MISC_IRQ(21));
+
+	platform_device_register(&ath79_nfc_device);
+}
+
+static void qca955x_nfc_hw_reset(bool active)
+{
+	if (active) {
+		ath79_device_reset_set(QCA955X_RESET_NANDF);
+		udelay(250);
+	} else {
+		ath79_device_reset_clear(QCA955X_RESET_NANDF);
+		udelay(100);
+	}
+}
+
+static void qca955x_nfc_setup(void)
+{
+	ath79_nfc_data.hw_reset = qca955x_nfc_hw_reset;
+
+	ath79_nfc_init_resource(ath79_nfc_resources,
+				QCA955X_NFC_BASE, QCA955X_NFC_SIZE,
+				ATH79_MISC_IRQ(21));
+
+	platform_device_register(&ath79_nfc_device);
+}
+
+void __init ath79_nfc_set_select_chip(void (*f)(int chip_no))
+{
+	ath79_nfc_data.select_chip = f;
+}
+
+void __init ath79_nfc_set_scan_fixup(int (*f)(struct mtd_info *mtd))
+{
+	ath79_nfc_data.scan_fixup = f;
+}
+
+void __init ath79_nfc_set_swap_dma(bool enable)
+{
+	ath79_nfc_data.swap_dma = enable;
+}
+
+void __init ath79_nfc_set_ecc_mode(enum ar934x_nfc_ecc_mode mode)
+{
+	ath79_nfc_data.ecc_mode = mode;
+}
+
+void __init ath79_nfc_set_parts(struct mtd_partition *parts, int nr_parts)
+{
+	ath79_nfc_data.parts = parts;
+	ath79_nfc_data.nr_parts = nr_parts;
+}
+
+void __init ath79_register_nfc(void)
+{
+	if (soc_is_ar934x())
+		ar934x_nfc_setup();
+	else if (soc_is_qca955x())
+		qca955x_nfc_setup();
+	else
+		BUG();
+}