From: Vimal Singh <vimalsingh@xxxxxx>
This patch adds 'board-zoom-flash.c', which could be utilized
by boards similar to ZOOM2. (For ex: LDP, ZOOM2, ZOOM3).
This does initialization for NAND device based on the 'cs' number
and partition information passed from board file (ex: board-zoom2.c).
Signed-off-by: Vimal Singh <vimalsingh@xxxxxx>
---
arch/arm/mach-omap2/board-zoom-flash.c | 85 +++++++++++++++++++++++++
arch/arm/mach-omap2/include/mach/board-zoom.h | 11 +++
2 files changed, 96 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/board-zoom-flash.c
diff --git a/arch/arm/mach-omap2/board-zoom-flash.c
b/arch/arm/mach-omap2/board-zoom-flash.c
new file mode 100644
index 0000000..f2328a4
--- /dev/null
+++ b/arch/arm/mach-omap2/board-zoom-flash.c
@@ -0,0 +1,85 @@
+/*
+ * board-zoom-flash.c
+ *
+ * Copyright (C) 2009 Texas Instruments Inc.
+ * Vimal Singh <vimalsingh@xxxxxx>
+ *
+ * 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/platform_device.h>
+#include <linux/mtd/nand.h>
+#include <linux/types.h>
+#include <linux/io.h>
+
+#include <asm/mach/flash.h>
+#include <plat/board.h>
+#include <plat/gpmc.h>
+#include <plat/nand.h>
+
+#include <mach/board-zoom.h>
+
+#if defined(CONFIG_MTD_NAND_OMAP2) || \
+ defined(CONFIG_MTD_NAND_OMAP2_MODULE)
+
+/* Note that all values in this struct are in nanoseconds */
+static struct gpmc_timings nand_timings = {
+
+ .sync_clk = 0,
+
+ .cs_on = 0,
+ .cs_rd_off = 36,
+ .cs_wr_off = 36,
+
+ .adv_on = 6,
+ .adv_rd_off = 24,
+ .adv_wr_off = 36,
+
+ .we_off = 30,
+ .oe_off = 48,
+
+ .access = 54,
+ .rd_cycle = 72,
+ .wr_cycle = 72,
+
+ .wr_access = 30,
+ .wr_data_mux_bus = 0,
+};
+
+/* NAND chip access: 16 bit */
+static struct omap_nand_platform_data zoom_nand_data = {
+ .nand_setup = NULL,
+ .gpmc_t = &nand_timings,
+ .dma_channel = -1, /* disable DMA in OMAP NAND driver */
+ .dev_ready = NULL,
+ .devsize = 1, /* '0' for 8-bit, '1' for 16-bit device */
+};
+
+/**
+ * zoom_flash_init - Identify devices connected to GPMC and register.
+ *
+ * @return - void.
+ */
+void __init zoom_flash_init(struct flash_partitions zoom_nand_parts[], int cs)
+{
+ u32 gpmc_base_add = OMAP34XX_GPMC_VIRT;
+
+ zoom_nand_data.cs = cs;
+ zoom_nand_data.parts = zoom_nand_parts[0].parts;
+ zoom_nand_data.nr_parts = zoom_nand_parts[0].nr_parts;
+ zoom_nand_data.gpmc_baseaddr = (void *)(gpmc_base_add);
+ zoom_nand_data.gpmc_cs_baseaddr = (void *)(gpmc_base_add +
+ GPMC_CS0_BASE +
+ cs * GPMC_CS_SIZE);
+ gpmc_nand_init(&zoom_nand_data);
+}
+#else
+void __init zoom_flash_init(struct flash_partitions zoom_nand_parts[], int cs)
+{
+}
+#endif /* CONFIG_MTD_NAND_OMAP2 || CONFIG_MTD_NAND_OMAP2_MODULE */
+
diff --git a/arch/arm/mach-omap2/include/mach/board-zoom.h
b/arch/arm/mach-omap2/include/mach/board-zoom.h
index c93b29e..f4469d3 100644
--- a/arch/arm/mach-omap2/include/mach/board-zoom.h
+++ b/arch/arm/mach-omap2/include/mach/board-zoom.h
@@ -1,5 +1,16 @@
/*
* Defines for zoom boards
*/
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+
+struct flash_partitions {
+ struct mtd_partition *parts;
+ int nr_parts;
+};
+
+#define ZOOM_NAND_CS 0
+
+extern void __init zoom_flash_init(struct flash_partitions [], int);
extern int __init zoom_debugboard_init(void);
extern void __init zoom_peripherals_init(void);
--
1.6.3.3
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