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/*
* Keystone2: Asynchronous EMIF Configuration
*
* (C) Copyright 2012-2014
* Texas Instruments Incorporated, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/ti-common/ti-aemif.h>
#define AEMIF_WAITCYCLE_CONFIG (CONFIG_AEMIF_CNTRL_BASE + 0x4)
#define AEMIF_NAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x60)
#define AEMIF_ONENAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x5c)
#define AEMIF_CONFIG(cs) (CONFIG_AEMIF_CNTRL_BASE + 0x10 \
+ (cs * 4))
#define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0)
#define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0)
#define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26)
#define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20)
#define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17)
#define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13)
#define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7)
#define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4)
#define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2)
#define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0)
#define set_config_field(reg, field, val) \
do { \
if (val != -1) { \
reg &= ~AEMIF_CFG_##field(0xffffffff); \
reg |= AEMIF_CFG_##field(val); \
} \
} while (0)
static void aemif_configure(int cs, struct aemif_config *cfg)
{
unsigned long tmp;
if (cfg->mode == AEMIF_MODE_NAND) {
tmp = __raw_readl(AEMIF_NAND_CONTROL);
tmp |= (1 << cs);
__raw_writel(tmp, AEMIF_NAND_CONTROL);
} else if (cfg->mode == AEMIF_MODE_ONENAND) {
tmp = __raw_readl(AEMIF_ONENAND_CONTROL);
tmp |= (1 << cs);
__raw_writel(tmp, AEMIF_ONENAND_CONTROL);
}
tmp = __raw_readl(AEMIF_CONFIG(cs));
set_config_field(tmp, SELECT_STROBE, cfg->select_strobe);
set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait);
set_config_field(tmp, WR_SETUP, cfg->wr_setup);
set_config_field(tmp, WR_STROBE, cfg->wr_strobe);
set_config_field(tmp, WR_HOLD, cfg->wr_hold);
set_config_field(tmp, RD_SETUP, cfg->rd_setup);
set_config_field(tmp, RD_STROBE, cfg->rd_strobe);
set_config_field(tmp, RD_HOLD, cfg->rd_hold);
set_config_field(tmp, TURN_AROUND, cfg->turn_around);
set_config_field(tmp, WIDTH, cfg->width);
__raw_writel(tmp, AEMIF_CONFIG(cs));
}
void aemif_init(int num_cs, struct aemif_config *config)
{
int cs;
if (num_cs > AEMIF_NUM_CS) {
num_cs = AEMIF_NUM_CS;
printf("AEMIF: csnum has to be <= 5");
}
for (cs = 0; cs < num_cs; cs++)
aemif_configure(cs, config + cs);
}
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