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git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/memory/ti-aemif.c
2 * Keystone2: Asynchronous EMIF Configuration
4 * (C) Copyright 2012-2014
5 * Texas Instruments Incorporated, <www.ti.com>
7 * SPDX-License-Identifier: GPL-2.0+
11 #include <asm/ti-common/ti-aemif.h>
13 #define AEMIF_WAITCYCLE_CONFIG (CONFIG_AEMIF_CNTRL_BASE + 0x4)
14 #define AEMIF_NAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x60)
15 #define AEMIF_ONENAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x5c)
16 #define AEMIF_CONFIG(cs) (CONFIG_AEMIF_CNTRL_BASE + 0x10 \
19 #define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0)
20 #define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0)
21 #define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26)
22 #define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20)
23 #define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17)
24 #define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13)
25 #define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7)
26 #define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4)
27 #define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2)
28 #define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0)
30 #define set_config_field(reg, field, val) \
33 reg &= ~AEMIF_CFG_##field(0xffffffff); \
34 reg |= AEMIF_CFG_##field(val); \
38 static void aemif_configure(int cs
, struct aemif_config
*cfg
)
42 if (cfg
->mode
== AEMIF_MODE_NAND
) {
43 tmp
= __raw_readl(AEMIF_NAND_CONTROL
);
45 __raw_writel(tmp
, AEMIF_NAND_CONTROL
);
47 } else if (cfg
->mode
== AEMIF_MODE_ONENAND
) {
48 tmp
= __raw_readl(AEMIF_ONENAND_CONTROL
);
50 __raw_writel(tmp
, AEMIF_ONENAND_CONTROL
);
53 tmp
= __raw_readl(AEMIF_CONFIG(cs
));
55 set_config_field(tmp
, SELECT_STROBE
, cfg
->select_strobe
);
56 set_config_field(tmp
, EXTEND_WAIT
, cfg
->extend_wait
);
57 set_config_field(tmp
, WR_SETUP
, cfg
->wr_setup
);
58 set_config_field(tmp
, WR_STROBE
, cfg
->wr_strobe
);
59 set_config_field(tmp
, WR_HOLD
, cfg
->wr_hold
);
60 set_config_field(tmp
, RD_SETUP
, cfg
->rd_setup
);
61 set_config_field(tmp
, RD_STROBE
, cfg
->rd_strobe
);
62 set_config_field(tmp
, RD_HOLD
, cfg
->rd_hold
);
63 set_config_field(tmp
, TURN_AROUND
, cfg
->turn_around
);
64 set_config_field(tmp
, WIDTH
, cfg
->width
);
66 __raw_writel(tmp
, AEMIF_CONFIG(cs
));
69 void aemif_init(int num_cs
, struct aemif_config
*config
)
73 if (num_cs
> AEMIF_NUM_CS
) {
74 num_cs
= AEMIF_NUM_CS
;
75 printf("AEMIF: csnum has to be <= 5");
78 for (cs
= 0; cs
< num_cs
; cs
++)
79 aemif_configure(cs
, config
+ cs
);