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>
19 #include <plat/nand.h>
20 #include <plat/board.h>
21 #include <plat/gpmc.h>
23 static struct omap_nand_platform_data *gpmc_nand_data;
25 static struct resource gpmc_nand_resource = {
26 .flags = IORESOURCE_MEM,
29 static struct platform_device gpmc_nand_device = {
33 .resource = &gpmc_nand_resource,
36 static int omap2_nand_gpmc_retime(void)
38 struct gpmc_timings t;
41 if (!gpmc_nand_data->gpmc_t)
44 memset(&t, 0, sizeof(t));
45 t.sync_clk = gpmc_nand_data->gpmc_t->sync_clk;
46 t.cs_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_on);
47 t.adv_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->adv_on);
50 t.adv_rd_off = gpmc_round_ns_to_ticks(
51 gpmc_nand_data->gpmc_t->adv_rd_off);
53 t.access = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->access);
54 t.oe_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->oe_off);
55 t.cs_rd_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_rd_off);
56 t.rd_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->rd_cycle);
59 t.adv_wr_off = gpmc_round_ns_to_ticks(
60 gpmc_nand_data->gpmc_t->adv_wr_off);
62 if (cpu_is_omap34xx()) {
63 t.wr_data_mux_bus = gpmc_round_ns_to_ticks(
64 gpmc_nand_data->gpmc_t->wr_data_mux_bus);
65 t.wr_access = gpmc_round_ns_to_ticks(
66 gpmc_nand_data->gpmc_t->wr_access);
68 t.we_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->we_off);
69 t.cs_wr_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_wr_off);
70 t.wr_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->wr_cycle);
73 if (gpmc_nand_data->devsize == NAND_BUSWIDTH_16)
74 gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 1);
76 gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 0);
77 gpmc_cs_configure(gpmc_nand_data->cs,
78 GPMC_CONFIG_DEV_TYPE, GPMC_DEVICETYPE_NAND);
79 err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t);
86 int __init gpmc_nand_init(struct omap_nand_platform_data *_nand_data)
89 struct device *dev = &gpmc_nand_device.dev;
91 gpmc_nand_data = _nand_data;
92 gpmc_nand_data->nand_setup = omap2_nand_gpmc_retime;
93 gpmc_nand_device.dev.platform_data = gpmc_nand_data;
95 err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
96 &gpmc_nand_data->phys_base);
98 dev_err(dev, "Cannot request GPMC CS\n");
102 /* Set timings in GPMC */
103 err = omap2_nand_gpmc_retime();
105 dev_err(dev, "Unable to set gpmc timings: %d\n", err);
109 /* Enable RD PIN Monitoring Reg */
110 if (gpmc_nand_data->dev_ready) {
111 gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_RDY_BSY, 1);
114 err = platform_device_register(&gpmc_nand_device);
116 dev_err(dev, "Unable to register NAND device\n");
123 gpmc_cs_free(gpmc_nand_data->cs);