mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
2c01946c6b
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>
124 lines
3.2 KiB
C
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;
|
|
}
|