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https://github.com/AsahiLinux/u-boot
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1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/*
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* TNETV107X: Asynchronous EMIF Configuration
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/mux.h>
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#define ASYNC_EMIF_BASE TNETV107X_ASYNC_EMIF_CNTRL_BASE
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#define ASYNC_EMIF_CONFIG(cs) (ASYNC_EMIF_BASE+0x10+(cs)*4)
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#define ASYNC_EMIF_ONENAND_CONTROL (ASYNC_EMIF_BASE+0x5c)
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#define ASYNC_EMIF_NAND_CONTROL (ASYNC_EMIF_BASE+0x60)
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#define ASYNC_EMIF_WAITCYCLE_CONFIG (ASYNC_EMIF_BASE+0x4)
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#define CONFIG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0)
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#define CONFIG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0)
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#define CONFIG_WR_SETUP(v) (((v) & 0x0f) << 26)
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#define CONFIG_WR_STROBE(v) (((v) & 0x3f) << 20)
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#define CONFIG_WR_HOLD(v) (((v) & 0x07) << 17)
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#define CONFIG_RD_SETUP(v) (((v) & 0x0f) << 13)
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#define CONFIG_RD_STROBE(v) (((v) & 0x3f) << 7)
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#define CONFIG_RD_HOLD(v) (((v) & 0x07) << 4)
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#define CONFIG_TURN_AROUND(v) (((v) & 0x03) << 2)
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#define CONFIG_WIDTH(v) (((v) & 0x03) << 0)
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#define NUM_CS 4
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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 &= ~CONFIG_##field(0xffffffff); \
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reg |= CONFIG_##field(val); \
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} \
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} while (0)
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void configure_async_emif(int cs, struct async_emif_config *cfg)
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{
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unsigned long tmp;
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if (cfg->mode == ASYNC_EMIF_MODE_NAND) {
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tmp = __raw_readl(ASYNC_EMIF_NAND_CONTROL);
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tmp |= (1 << cs);
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__raw_writel(tmp, ASYNC_EMIF_NAND_CONTROL);
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} else if (cfg->mode == ASYNC_EMIF_MODE_ONENAND) {
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tmp = __raw_readl(ASYNC_EMIF_ONENAND_CONTROL);
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tmp |= (1 << cs);
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__raw_writel(tmp, ASYNC_EMIF_ONENAND_CONTROL);
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}
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tmp = __raw_readl(ASYNC_EMIF_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, ASYNC_EMIF_CONFIG(cs));
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}
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void init_async_emif(int num_cs, struct async_emif_config *config)
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{
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int cs;
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clk_enable(TNETV107X_LPSC_AEMIF);
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for (cs = 0; cs < num_cs; cs++)
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configure_async_emif(cs, config + cs);
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}
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