linux/arch/arm/mach-omap2/gpmc-nand.c
Sukumar Ghorai 2c01946c6b omap3 nand: cleanup virtual address usages
This patch removes direct reference of gpmc address from generic nand platform code.
Nand platform code now uses wrapper functions which are implemented in gpmc module.

Signed-off-by: Sukumar Ghorai <s-ghorai@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-08-02 15:30:38 +03:00

124 lines
3.2 KiB
C

/*
* gpmc-nand.c
*
* 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/io.h>
#include <asm/mach/flash.h>
#include <plat/nand.h>
#include <plat/board.h>
#include <plat/gpmc.h>
static struct omap_nand_platform_data *gpmc_nand_data;
static struct resource gpmc_nand_resource = {
.flags = IORESOURCE_MEM,
};
static struct platform_device gpmc_nand_device = {
.name = "omap2-nand",
.id = 0,
.num_resources = 1,
.resource = &gpmc_nand_resource,
};
static int omap2_nand_gpmc_retime(void)
{
struct gpmc_timings t;
int err;
if (!gpmc_nand_data->gpmc_t)
return 0;
memset(&t, 0, sizeof(t));
t.sync_clk = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->sync_clk);
t.cs_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_on);
t.adv_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->adv_on);
/* Read */
t.adv_rd_off = gpmc_round_ns_to_ticks(
gpmc_nand_data->gpmc_t->adv_rd_off);
t.oe_on = t.adv_on;
t.access = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->access);
t.oe_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->oe_off);
t.cs_rd_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_rd_off);
t.rd_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->rd_cycle);
/* Write */
t.adv_wr_off = gpmc_round_ns_to_ticks(
gpmc_nand_data->gpmc_t->adv_wr_off);
t.we_on = t.oe_on;
if (cpu_is_omap34xx()) {
t.wr_data_mux_bus = gpmc_round_ns_to_ticks(
gpmc_nand_data->gpmc_t->wr_data_mux_bus);
t.wr_access = gpmc_round_ns_to_ticks(
gpmc_nand_data->gpmc_t->wr_access);
}
t.we_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->we_off);
t.cs_wr_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_wr_off);
t.wr_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->wr_cycle);
/* Configure GPMC */
gpmc_cs_configure(gpmc_nand_data->cs,
GPMC_CONFIG_DEV_SIZE, gpmc_nand_data->devsize);
gpmc_cs_configure(gpmc_nand_data->cs,
GPMC_CONFIG_DEV_TYPE, GPMC_DEVICETYPE_NAND);
err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t);
if (err)
return err;
return 0;
}
int __init gpmc_nand_init(struct omap_nand_platform_data *_nand_data)
{
int err = 0;
struct device *dev = &gpmc_nand_device.dev;
gpmc_nand_data = _nand_data;
gpmc_nand_data->nand_setup = omap2_nand_gpmc_retime;
gpmc_nand_device.dev.platform_data = gpmc_nand_data;
err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
&gpmc_nand_data->phys_base);
if (err < 0) {
dev_err(dev, "Cannot request GPMC CS\n");
return err;
}
/* Set timings in GPMC */
err = omap2_nand_gpmc_retime();
if (err < 0) {
dev_err(dev, "Unable to set gpmc timings: %d\n", err);
return err;
}
/* Enable RD PIN Monitoring Reg */
if (gpmc_nand_data->dev_ready) {
gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_RDY_BSY, 1);
}
err = platform_device_register(&gpmc_nand_device);
if (err < 0) {
dev_err(dev, "Unable to register NAND device\n");
goto out_free_cs;
}
return 0;
out_free_cs:
gpmc_cs_free(gpmc_nand_data->cs);
return err;
}