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This is only used in the aemif driver that is otherwise currently keystone2 centric. Moving forward, if this is applicable to some other platform then such base addresses should be able to be obtained via the device tree. Use KS2_AEMIF_CNTRL_BASE directly now rather than indirectly. Signed-off-by: Tom Rini <trini@konsulko.com>
78 lines
2.3 KiB
C
78 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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