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>
16 #include <asm/mach/flash.h>
18 #include <plat/nand.h>
19 #include <plat/board.h>
20 #include <plat/gpmc.h>
22 #define WR_RD_PIN_MONITORING 0x00600000
24 static struct omap_nand_platform_data *gpmc_nand_data;
26 static struct resource gpmc_nand_resource = {
27 .flags = IORESOURCE_MEM,
30 static struct platform_device gpmc_nand_device = {
34 .resource = &gpmc_nand_resource,
37 static int omap2_nand_gpmc_retime(void)
39 struct gpmc_timings t;
42 if (!gpmc_nand_data->gpmc_t)
45 memset(&t, 0, sizeof(t));
46 t.sync_clk = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->sync_clk);
47 t.cs_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_on);
48 t.adv_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->adv_on);
51 t.adv_rd_off = gpmc_round_ns_to_ticks(
52 gpmc_nand_data->gpmc_t->adv_rd_off);
54 t.access = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->access);
55 t.oe_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->oe_off);
56 t.cs_rd_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_rd_off);
57 t.rd_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->rd_cycle);
60 t.adv_wr_off = gpmc_round_ns_to_ticks(
61 gpmc_nand_data->gpmc_t->adv_wr_off);
63 if (cpu_is_omap34xx()) {
64 t.wr_data_mux_bus = gpmc_round_ns_to_ticks(
65 gpmc_nand_data->gpmc_t->wr_data_mux_bus);
66 t.wr_access = gpmc_round_ns_to_ticks(
67 gpmc_nand_data->gpmc_t->wr_access);
69 t.we_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->we_off);
70 t.cs_wr_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_wr_off);
71 t.wr_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->wr_cycle);
74 gpmc_cs_write_reg(gpmc_nand_data->cs, GPMC_CS_CONFIG1,
75 GPMC_CONFIG1_DEVICESIZE(gpmc_nand_data->devsize) |
76 GPMC_CONFIG1_DEVICETYPE_NAND);
78 err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t);
85 static int gpmc_nand_setup(void)
87 struct device *dev = &gpmc_nand_device.dev;
89 /* Set timings in GPMC */
90 if (omap2_nand_gpmc_retime() < 0) {
91 dev_err(dev, "Unable to set gpmc timings\n");
98 int __init gpmc_nand_init(struct omap_nand_platform_data *_nand_data)
102 struct device *dev = &gpmc_nand_device.dev;
104 gpmc_nand_data = _nand_data;
105 gpmc_nand_data->nand_setup = gpmc_nand_setup;
106 gpmc_nand_device.dev.platform_data = gpmc_nand_data;
108 err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
109 &gpmc_nand_data->phys_base);
111 dev_err(dev, "Cannot request GPMC CS\n");
115 err = gpmc_nand_setup();
117 dev_err(dev, "NAND platform setup failed: %d\n", err);
121 /* Enable RD PIN Monitoring Reg */
122 if (gpmc_nand_data->dev_ready) {
123 val = gpmc_cs_read_reg(gpmc_nand_data->cs,
125 val |= WR_RD_PIN_MONITORING;
126 gpmc_cs_write_reg(gpmc_nand_data->cs,
127 GPMC_CS_CONFIG1, val);
130 err = platform_device_register(&gpmc_nand_device);
132 dev_err(dev, "Unable to register NAND device\n");
139 gpmc_cs_free(gpmc_nand_data->cs);