4 * Copyright (C) 2009 Texas Instruments
5 * Vimal Singh <vimalsingh@ti.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/platform_device.h>
15 #include <linux/mtd/nand.h>
17 #include <asm/mach/flash.h>
20 #include <plat/nand.h>
21 #include <plat/board.h>
22 #include <plat/gpmc.h>
24 static struct resource gpmc_nand_resource = {
25 .flags = IORESOURCE_MEM,
28 static struct platform_device gpmc_nand_device = {
32 .resource = &gpmc_nand_resource,
35 static int omap2_nand_gpmc_retime(struct omap_nand_platform_data *gpmc_nand_data)
37 struct gpmc_timings t;
40 if (!gpmc_nand_data->gpmc_t)
43 memset(&t, 0, sizeof(t));
44 t.sync_clk = gpmc_nand_data->gpmc_t->sync_clk;
45 t.cs_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_on);
46 t.adv_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->adv_on);
49 t.adv_rd_off = gpmc_round_ns_to_ticks(
50 gpmc_nand_data->gpmc_t->adv_rd_off);
52 t.access = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->access);
53 t.oe_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->oe_off);
54 t.cs_rd_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_rd_off);
55 t.rd_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->rd_cycle);
58 t.adv_wr_off = gpmc_round_ns_to_ticks(
59 gpmc_nand_data->gpmc_t->adv_wr_off);
61 if (cpu_is_omap34xx()) {
62 t.wr_data_mux_bus = gpmc_round_ns_to_ticks(
63 gpmc_nand_data->gpmc_t->wr_data_mux_bus);
64 t.wr_access = gpmc_round_ns_to_ticks(
65 gpmc_nand_data->gpmc_t->wr_access);
67 t.we_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->we_off);
68 t.cs_wr_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_wr_off);
69 t.wr_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->wr_cycle);
72 if (gpmc_nand_data->devsize == NAND_BUSWIDTH_16)
73 gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 1);
75 gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 0);
76 gpmc_cs_configure(gpmc_nand_data->cs,
77 GPMC_CONFIG_DEV_TYPE, GPMC_DEVICETYPE_NAND);
78 err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t);
85 int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data)
88 struct device *dev = &gpmc_nand_device.dev;
90 gpmc_nand_device.dev.platform_data = gpmc_nand_data;
92 err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
93 &gpmc_nand_data->phys_base);
95 dev_err(dev, "Cannot request GPMC CS\n");
99 /* Set timings in GPMC */
100 err = omap2_nand_gpmc_retime(gpmc_nand_data);
102 dev_err(dev, "Unable to set gpmc timings: %d\n", err);
106 /* Enable RD PIN Monitoring Reg */
107 if (gpmc_nand_data->dev_ready) {
108 gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_RDY_BSY, 1);
111 err = platform_device_register(&gpmc_nand_device);
113 dev_err(dev, "Unable to register NAND device\n");
120 gpmc_cs_free(gpmc_nand_data->cs);