1 // SPDX-License-Identifier: GPL-2.0+
3 * Keystone2: Asynchronous EMIF Configuration
5 * (C) Copyright 2012-2014
6 * Texas Instruments Incorporated, <www.ti.com>
10 #include <asm/ti-common/ti-aemif.h>
12 #define AEMIF_WAITCYCLE_CONFIG (CONFIG_AEMIF_CNTRL_BASE + 0x4)
13 #define AEMIF_NAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x60)
14 #define AEMIF_ONENAND_CONTROL (CONFIG_AEMIF_CNTRL_BASE + 0x5c)
15 #define AEMIF_CONFIG(cs) (CONFIG_AEMIF_CNTRL_BASE + 0x10 \
18 #define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0)
19 #define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0)
20 #define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26)
21 #define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20)
22 #define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17)
23 #define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13)
24 #define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7)
25 #define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4)
26 #define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2)
27 #define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0)
29 #define set_config_field(reg, field, val) \
32 reg &= ~AEMIF_CFG_##field(0xffffffff); \
33 reg |= AEMIF_CFG_##field(val); \
37 static void aemif_configure(int cs, struct aemif_config *cfg)
41 if (cfg->mode == AEMIF_MODE_NAND) {
42 tmp = __raw_readl(AEMIF_NAND_CONTROL);
44 __raw_writel(tmp, AEMIF_NAND_CONTROL);
46 } else if (cfg->mode == AEMIF_MODE_ONENAND) {
47 tmp = __raw_readl(AEMIF_ONENAND_CONTROL);
49 __raw_writel(tmp, AEMIF_ONENAND_CONTROL);
52 tmp = __raw_readl(AEMIF_CONFIG(cs));
54 set_config_field(tmp, SELECT_STROBE, cfg->select_strobe);
55 set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait);
56 set_config_field(tmp, WR_SETUP, cfg->wr_setup);
57 set_config_field(tmp, WR_STROBE, cfg->wr_strobe);
58 set_config_field(tmp, WR_HOLD, cfg->wr_hold);
59 set_config_field(tmp, RD_SETUP, cfg->rd_setup);
60 set_config_field(tmp, RD_STROBE, cfg->rd_strobe);
61 set_config_field(tmp, RD_HOLD, cfg->rd_hold);
62 set_config_field(tmp, TURN_AROUND, cfg->turn_around);
63 set_config_field(tmp, WIDTH, cfg->width);
65 __raw_writel(tmp, AEMIF_CONFIG(cs));
68 void aemif_init(int num_cs, struct aemif_config *config)
72 if (num_cs > AEMIF_NUM_CS) {
73 num_cs = AEMIF_NUM_CS;
74 printf("AEMIF: csnum has to be <= 5");
77 for (cs = 0; cs < num_cs; cs++)
78 aemif_configure(cs, config + cs);