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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
80 lines
2.4 KiB
C
80 lines
2.4 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 (CONFIG_AEMIF_CNTRL_BASE + 0x4)
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#define AEMIF_NAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x60)
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#define AEMIF_ONENAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x5c)
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#define AEMIF_CONFIG(cs) (CONFIG_AEMIF_CNTRL_BASE + 0x10 \
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+ (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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