79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Keystone2: Asynchronous EMIF Configuration
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*
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* (C) Copyright 2012-2014
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* Texas Instruments Incorporated, <www.ti.com>
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*/
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#include <common.h>
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#include <asm/ti-common/ti-aemif.h>
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#define AEMIF_WAITCYCLE_CONFIG (KS2_AEMIF_CNTRL_BASE + 0x4)
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#define AEMIF_NAND_CONTROL (KS2_AEMIF_CNTRL_BASE + 0x60)
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#define AEMIF_ONENAND_CONTROL (KS2_AEMIF_CNTRL_BASE + 0x5c)
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#define AEMIF_CONFIG(cs) (KS2_AEMIF_CNTRL_BASE + 0x10 + (cs * 4))
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#define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0)
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#define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0)
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#define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26)
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#define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20)
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#define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17)
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#define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13)
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#define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7)
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#define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4)
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#define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2)
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#define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0)
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#define set_config_field(reg, field, val) \
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do { \
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if (val != -1) { \
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reg &= ~AEMIF_CFG_##field(0xffffffff); \
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reg |= AEMIF_CFG_##field(val); \
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} \
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} while (0)
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static void aemif_configure(int cs, struct aemif_config *cfg)
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{
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unsigned long tmp;
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if (cfg->mode == AEMIF_MODE_NAND) {
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tmp = __raw_readl(AEMIF_NAND_CONTROL);
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tmp |= (1 << cs);
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__raw_writel(tmp, AEMIF_NAND_CONTROL);
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} else if (cfg->mode == AEMIF_MODE_ONENAND) {
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tmp = __raw_readl(AEMIF_ONENAND_CONTROL);
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tmp |= (1 << cs);
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__raw_writel(tmp, AEMIF_ONENAND_CONTROL);
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}
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tmp = __raw_readl(AEMIF_CONFIG(cs));
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set_config_field(tmp, SELECT_STROBE, cfg->select_strobe);
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set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait);
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set_config_field(tmp, WR_SETUP, cfg->wr_setup);
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set_config_field(tmp, WR_STROBE, cfg->wr_strobe);
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set_config_field(tmp, WR_HOLD, cfg->wr_hold);
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set_config_field(tmp, RD_SETUP, cfg->rd_setup);
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set_config_field(tmp, RD_STROBE, cfg->rd_strobe);
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set_config_field(tmp, RD_HOLD, cfg->rd_hold);
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set_config_field(tmp, TURN_AROUND, cfg->turn_around);
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set_config_field(tmp, WIDTH, cfg->width);
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__raw_writel(tmp, AEMIF_CONFIG(cs));
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}
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void aemif_init(int num_cs, struct aemif_config *config)
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{
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int cs;
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if (num_cs > AEMIF_NUM_CS) {
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num_cs = AEMIF_NUM_CS;
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printf("AEMIF: csnum has to be <= 5");
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}
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for (cs = 0; cs < num_cs; cs++)
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aemif_configure(cs, config + cs);
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}
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