From 392e8802486cb573b916e746010e141a75f507e6 Mon Sep 17 00:00:00 2001
From: Kevin
Date: Sat, 15 Nov 2014 09:58:27 +0800
Subject: init android origin source code

---
 ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-nand.c | 123 ++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-nand.c

(limited to 'ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-nand.c')

diff --git a/ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-nand.c b/ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-nand.c
new file mode 100644
index 00000000..386dec8d
--- /dev/null
+++ b/ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-nand.c
@@ -0,0 +1,123 @@
+/*
+ * gpmc-nand.c
+ *
+ * Copyright (C) 2009 Texas Instruments
+ * Vimal Singh <vimalsingh@ti.com>
+ *
+ * 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/platform_device.h>
+#include <linux/io.h>
+#include <linux/mtd/nand.h>
+
+#include <asm/mach/flash.h>
+
+#include <plat/cpu.h>
+#include <plat/nand.h>
+#include <plat/board.h>
+#include <plat/gpmc.h>
+
+static struct resource gpmc_nand_resource = {
+	.flags		= IORESOURCE_MEM,
+};
+
+static struct platform_device gpmc_nand_device = {
+	.name		= "omap2-nand",
+	.id		= 0,
+	.num_resources	= 1,
+	.resource	= &gpmc_nand_resource,
+};
+
+static int omap2_nand_gpmc_retime(struct omap_nand_platform_data *gpmc_nand_data)
+{
+	struct gpmc_timings t;
+	int err;
+
+	if (!gpmc_nand_data->gpmc_t)
+		return 0;
+
+	memset(&t, 0, sizeof(t));
+	t.sync_clk = gpmc_nand_data->gpmc_t->sync_clk;
+	t.cs_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_on);
+	t.adv_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->adv_on);
+
+	/* Read */
+	t.adv_rd_off = gpmc_round_ns_to_ticks(
+				gpmc_nand_data->gpmc_t->adv_rd_off);
+	t.oe_on  = t.adv_on;
+	t.access = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->access);
+	t.oe_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->oe_off);
+	t.cs_rd_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_rd_off);
+	t.rd_cycle  = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->rd_cycle);
+
+	/* Write */
+	t.adv_wr_off = gpmc_round_ns_to_ticks(
+				gpmc_nand_data->gpmc_t->adv_wr_off);
+	t.we_on  = t.oe_on;
+	if (cpu_is_omap34xx()) {
+	    t.wr_data_mux_bus =	gpmc_round_ns_to_ticks(
+				gpmc_nand_data->gpmc_t->wr_data_mux_bus);
+	    t.wr_access = gpmc_round_ns_to_ticks(
+				gpmc_nand_data->gpmc_t->wr_access);
+	}
+	t.we_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->we_off);
+	t.cs_wr_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_wr_off);
+	t.wr_cycle  = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->wr_cycle);
+
+	/* Configure GPMC */
+	if (gpmc_nand_data->devsize == NAND_BUSWIDTH_16)
+		gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 1);
+	else
+		gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 0);
+	gpmc_cs_configure(gpmc_nand_data->cs,
+			GPMC_CONFIG_DEV_TYPE, GPMC_DEVICETYPE_NAND);
+	err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data)
+{
+	int err	= 0;
+	struct device *dev = &gpmc_nand_device.dev;
+
+	gpmc_nand_device.dev.platform_data = gpmc_nand_data;
+
+	err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
+				&gpmc_nand_data->phys_base);
+	if (err < 0) {
+		dev_err(dev, "Cannot request GPMC CS\n");
+		return err;
+	}
+
+	 /* Set timings in GPMC */
+	err = omap2_nand_gpmc_retime(gpmc_nand_data);
+	if (err < 0) {
+		dev_err(dev, "Unable to set gpmc timings: %d\n", err);
+		return err;
+	}
+
+	/* Enable RD PIN Monitoring Reg */
+	if (gpmc_nand_data->dev_ready) {
+		gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_RDY_BSY, 1);
+	}
+
+	err = platform_device_register(&gpmc_nand_device);
+	if (err < 0) {
+		dev_err(dev, "Unable to register NAND device\n");
+		goto out_free_cs;
+	}
+
+	return 0;
+
+out_free_cs:
+	gpmc_cs_free(gpmc_nand_data->cs);
+
+	return err;
+}
-- 
cgit