board-flash.c 5.96 KB
Newer Older
1
/*
Sanjeev Premi's avatar
Sanjeev Premi committed
2
 * board-flash.c
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
 * 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/platform_device.h>
#include <linux/mtd/physmap.h>
#include <linux/io.h>
19
#include <plat/irqs.h>
20 21 22 23 24

#include <plat/gpmc.h>
#include <plat/nand.h>
#include <plat/onenand.h>
#include <plat/tc.h>
25 26

#include "board-flash.h"
27 28 29 30 31 32 33 34 35 36 37

#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) */

38
static struct physmap_flash_data board_nor_data = {
39 40 41
	.width		= 2,
};

42
static struct resource board_nor_resource = {
43 44 45
	.flags		= IORESOURCE_MEM,
};

46
static struct platform_device board_nor_device = {
47 48 49
	.name		= "physmap-flash",
	.id		= 0,
	.dev		= {
50
			.platform_data = &board_nor_data,
51 52
	},
	.num_resources	= 1,
53
	.resource	= &board_nor_resource,
54 55 56
};

static void
57
__init board_nor_init(struct mtd_partition *nor_parts, u8 nr_parts, u8 cs)
58 59 60
{
	int err;

61 62
	board_nor_data.parts	= nor_parts;
	board_nor_data.nr_parts	= nr_parts;
63 64 65 66

	/* Configure start address and size of NOR device */
	if (omap_rev() >= OMAP3430_REV_ES1_0) {
		err = gpmc_cs_request(cs, FLASH_SIZE_SDPV2 - 1,
67 68
				(unsigned long *)&board_nor_resource.start);
		board_nor_resource.end = board_nor_resource.start
69 70 71
					+ FLASH_SIZE_SDPV2 - 1;
	} else {
		err = gpmc_cs_request(cs, FLASH_SIZE_SDPV1 - 1,
72 73
				(unsigned long *)&board_nor_resource.start);
		board_nor_resource.end = board_nor_resource.start
74 75 76
					+ FLASH_SIZE_SDPV1 - 1;
	}
	if (err < 0) {
77
		pr_err("NOR: Can't request GPMC CS\n");
78 79
		return;
	}
80
	if (platform_device_register(&board_nor_device) < 0)
81
		pr_err("Unable to register NOR device\n");
82 83 84 85 86 87 88 89
}

#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 */
};

90
void
91 92
__init board_onenand_init(struct mtd_partition *onenand_parts,
				u8 nr_parts, u8 cs)
93 94
{
	board_onenand_data.cs		= cs;
95 96
	board_onenand_data.parts	= onenand_parts;
	board_onenand_data.nr_parts	= nr_parts;
97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128

	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 */
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,
};

129
static struct omap_nand_platform_data board_nand_data = {
130 131 132
	.gpmc_t		= &nand_timings,
};

133
void
134 135
__init board_nand_init(struct mtd_partition *nand_parts,
			u8 nr_parts, u8 cs, int nand_type)
136
{
137 138
	board_nand_data.cs		= cs;
	board_nand_data.parts		= nand_parts;
139 140
	board_nand_data.nr_parts	= nr_parts;
	board_nand_data.devsize		= nand_type;
141

142
	board_nand_data.ecc_opt = OMAP_ECC_HAMMING_CODE_DEFAULT;
143
	board_nand_data.gpmc_irq = OMAP_GPMC_IRQ_BASE + cs;
144
	gpmc_nand_init(&board_nand_data);
145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182
}
#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 (!(__raw_readw(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 = __raw_readw(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;
}

/**
Sanjeev Premi's avatar
Sanjeev Premi committed
183
 * board_flash_init - Identify devices connected to GPMC and register.
184 185 186
 *
 * @return - void.
 */
187
void __init board_flash_init(struct flash_partitions partition_info[],
188
			char chip_sel_board[][GPMC_CS_NUM], int nand_type)
189 190 191 192 193 194 195 196 197 198 199 200 201
{
	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) {
202
		pr_err("%s: Invalid chip select: %d\n", __func__, cs);
203 204
		return;
	}
205
	config_sel = (unsigned char *)(chip_sel_board[idx]);
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225

	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)
226
		pr_err("NOR: Unable to find configuration in GPMC\n");
227
	else
228 229
		board_nor_init(partition_info[0].parts,
				partition_info[0].nr_parts, norcs);
230 231

	if (onenandcs > GPMC_CS_NUM)
232
		pr_err("OneNAND: Unable to find configuration in GPMC\n");
233
	else
234 235
		board_onenand_init(partition_info[1].parts,
					partition_info[1].nr_parts, onenandcs);
236 237

	if (nandcs > GPMC_CS_NUM)
238
		pr_err("NAND: Unable to find configuration in GPMC\n");
239
	else
240
		board_nand_init(partition_info[2].parts,
241
			partition_info[2].nr_parts, nandcs, nand_type);
242
}