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-rw-r--r--kernel/arch/arm/mach-omap2/board-flash.c244
1 files changed, 244 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-omap2/board-flash.c b/kernel/arch/arm/mach-omap2/board-flash.c
new file mode 100644
index 000000000..70b21cc27
--- /dev/null
+++ b/kernel/arch/arm/mach-omap2/board-flash.c
@@ -0,0 +1,244 @@
+/*
+ * board-flash.c
+ * Modified from mach-omap2/board-3430sdp-flash.c
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * 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/omap-gpmc.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/physmap.h>
+#include <linux/io.h>
+
+#include <linux/platform_data/mtd-nand-omap2.h>
+#include <linux/platform_data/mtd-onenand-omap2.h>
+
+#include "soc.h"
+#include "common.h"
+#include "board-flash.h"
+
+#define REG_FPGA_REV 0x10
+#define REG_FPGA_DIP_SWITCH_INPUT2 0x60
+#define MAX_SUPPORTED_GPMC_CONFIG 3
+
+#define DEBUG_BASE 0x08000000 /* debug board */
+
+/* various memory sizes */
+#define FLASH_SIZE_SDPV1 SZ_64M /* NOR flash (64 Meg aligned) */
+#define FLASH_SIZE_SDPV2 SZ_128M /* NOR flash (256 Meg aligned) */
+
+static struct physmap_flash_data board_nor_data = {
+ .width = 2,
+};
+
+static struct resource board_nor_resource = {
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device board_nor_device = {
+ .name = "physmap-flash",
+ .id = 0,
+ .dev = {
+ .platform_data = &board_nor_data,
+ },
+ .num_resources = 1,
+ .resource = &board_nor_resource,
+};
+
+static void
+__init board_nor_init(struct mtd_partition *nor_parts, u8 nr_parts, u8 cs)
+{
+ int err;
+
+ board_nor_data.parts = nor_parts;
+ board_nor_data.nr_parts = nr_parts;
+
+ /* Configure start address and size of NOR device */
+ if (omap_rev() >= OMAP3430_REV_ES1_0) {
+ err = gpmc_cs_request(cs, FLASH_SIZE_SDPV2 - 1,
+ (unsigned long *)&board_nor_resource.start);
+ board_nor_resource.end = board_nor_resource.start
+ + FLASH_SIZE_SDPV2 - 1;
+ } else {
+ err = gpmc_cs_request(cs, FLASH_SIZE_SDPV1 - 1,
+ (unsigned long *)&board_nor_resource.start);
+ board_nor_resource.end = board_nor_resource.start
+ + FLASH_SIZE_SDPV1 - 1;
+ }
+ if (err < 0) {
+ pr_err("NOR: Can't request GPMC CS\n");
+ return;
+ }
+ if (platform_device_register(&board_nor_device) < 0)
+ pr_err("Unable to register NOR device\n");
+}
+
+#if defined(CONFIG_MTD_ONENAND_OMAP2) || \
+ defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)
+static struct omap_onenand_platform_data board_onenand_data = {
+ .dma_channel = -1, /* disable DMA in OMAP OneNAND driver */
+};
+
+void
+__init board_onenand_init(struct mtd_partition *onenand_parts,
+ u8 nr_parts, u8 cs)
+{
+ board_onenand_data.cs = cs;
+ board_onenand_data.parts = onenand_parts;
+ board_onenand_data.nr_parts = nr_parts;
+
+ gpmc_onenand_init(&board_onenand_data);
+}
+#endif /* CONFIG_MTD_ONENAND_OMAP2 || CONFIG_MTD_ONENAND_OMAP2_MODULE */
+
+#if defined(CONFIG_MTD_NAND_OMAP2) || \
+ defined(CONFIG_MTD_NAND_OMAP2_MODULE)
+
+/* Note that all values in this struct are in nanoseconds */
+struct gpmc_timings nand_default_timings[1] = {
+ {
+ .sync_clk = 0,
+
+ .cs_on = 0,
+ .cs_rd_off = 36,
+ .cs_wr_off = 36,
+
+ .we_on = 6,
+ .oe_on = 6,
+
+ .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,
+ },
+};
+
+static struct omap_nand_platform_data board_nand_data;
+
+void
+__init board_nand_init(struct mtd_partition *nand_parts, u8 nr_parts, u8 cs,
+ int nand_type, struct gpmc_timings *gpmc_t)
+{
+ board_nand_data.cs = cs;
+ board_nand_data.parts = nand_parts;
+ board_nand_data.nr_parts = nr_parts;
+ board_nand_data.devsize = nand_type;
+
+ board_nand_data.ecc_opt = OMAP_ECC_HAM1_CODE_SW;
+ gpmc_nand_init(&board_nand_data, gpmc_t);
+}
+#endif /* CONFIG_MTD_NAND_OMAP2 || CONFIG_MTD_NAND_OMAP2_MODULE */
+
+/**
+ * get_gpmc0_type - Reads the FPGA DIP_SWITCH_INPUT_REGISTER2 to get
+ * the various cs values.
+ */
+static u8 get_gpmc0_type(void)
+{
+ u8 cs = 0;
+ void __iomem *fpga_map_addr;
+
+ fpga_map_addr = ioremap(DEBUG_BASE, 4096);
+ if (!fpga_map_addr)
+ return -ENOMEM;
+
+ if (!(readw_relaxed(fpga_map_addr + REG_FPGA_REV)))
+ /* we dont have an DEBUG FPGA??? */
+ /* Depend on #defines!! default to strata boot return param */
+ goto unmap;
+
+ /* S8-DIP-OFF = 1, S8-DIP-ON = 0 */
+ cs = readw_relaxed(fpga_map_addr + REG_FPGA_DIP_SWITCH_INPUT2) & 0xf;
+
+ /* ES2.0 SDP's onwards 4 dip switches are provided for CS */
+ if (omap_rev() >= OMAP3430_REV_ES1_0)
+ /* change (S8-1:4=DS-2:0) to (S8-4:1=DS-2:0) */
+ cs = ((cs & 8) >> 3) | ((cs & 4) >> 1) |
+ ((cs & 2) << 1) | ((cs & 1) << 3);
+ else
+ /* change (S8-1:3=DS-2:0) to (S8-3:1=DS-2:0) */
+ cs = ((cs & 4) >> 2) | (cs & 2) | ((cs & 1) << 2);
+unmap:
+ iounmap(fpga_map_addr);
+ return cs;
+}
+
+/**
+ * board_flash_init - Identify devices connected to GPMC and register.
+ *
+ * @return - void.
+ */
+void __init board_flash_init(struct flash_partitions partition_info[],
+ char chip_sel_board[][GPMC_CS_NUM], int nand_type)
+{
+ u8 cs = 0;
+ u8 norcs = GPMC_CS_NUM + 1;
+ u8 nandcs = GPMC_CS_NUM + 1;
+ u8 onenandcs = GPMC_CS_NUM + 1;
+ u8 idx;
+ unsigned char *config_sel = NULL;
+
+ /* REVISIT: Is this return correct idx for 2430 SDP?
+ * for which cs configuration matches for 2430 SDP?
+ */
+ idx = get_gpmc0_type();
+ if (idx >= MAX_SUPPORTED_GPMC_CONFIG) {
+ pr_err("%s: Invalid chip select: %d\n", __func__, cs);
+ return;
+ }
+ config_sel = (unsigned char *)(chip_sel_board[idx]);
+
+ while (cs < GPMC_CS_NUM) {
+ switch (config_sel[cs]) {
+ case PDC_NOR:
+ if (norcs > GPMC_CS_NUM)
+ norcs = cs;
+ break;
+ case PDC_NAND:
+ if (nandcs > GPMC_CS_NUM)
+ nandcs = cs;
+ break;
+ case PDC_ONENAND:
+ if (onenandcs > GPMC_CS_NUM)
+ onenandcs = cs;
+ break;
+ }
+ cs++;
+ }
+
+ if (norcs > GPMC_CS_NUM)
+ pr_err("NOR: Unable to find configuration in GPMC\n");
+ else
+ board_nor_init(partition_info[0].parts,
+ partition_info[0].nr_parts, norcs);
+
+ if (onenandcs > GPMC_CS_NUM)
+ pr_err("OneNAND: Unable to find configuration in GPMC\n");
+ else
+ board_onenand_init(partition_info[1].parts,
+ partition_info[1].nr_parts, onenandcs);
+
+ if (nandcs > GPMC_CS_NUM)
+ pr_err("NAND: Unable to find configuration in GPMC\n");
+ else
+ board_nand_init(partition_info[2].parts,
+ partition_info[2].nr_parts, nandcs,
+ nand_type, nand_default_timings);
+}