2 * Keystone2: Asynchronous EMIF Configuration
4 * (C) Copyright 2012-2014
5 * Texas Instruments Incorporated, <www.ti.com>
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/arch/clock.h>
13 #include <asm/arch/emif_defs.h>
15 #define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0)
16 #define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0)
17 #define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26)
18 #define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20)
19 #define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17)
20 #define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13)
21 #define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7)
22 #define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4)
23 #define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2)
24 #define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0)
26 #define set_config_field(reg, field, val) \
29 reg &= ~AEMIF_CFG_##field(0xffffffff); \
30 reg |= AEMIF_CFG_##field(val); \
34 void configure_async_emif(int cs, struct async_emif_config *cfg)
38 if (cfg->mode == ASYNC_EMIF_MODE_NAND) {
39 tmp = __raw_readl(&davinci_emif_regs->nandfcr);
41 __raw_writel(tmp, &davinci_emif_regs->nandfcr);
43 } else if (cfg->mode == ASYNC_EMIF_MODE_ONENAND) {
44 tmp = __raw_readl(&davinci_emif_regs->one_nand_cr);
46 __raw_writel(tmp, &davinci_emif_regs->one_nand_cr);
49 tmp = __raw_readl(&davinci_emif_regs->abncr[cs]);
51 set_config_field(tmp, SELECT_STROBE, cfg->select_strobe);
52 set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait);
53 set_config_field(tmp, WR_SETUP, cfg->wr_setup);
54 set_config_field(tmp, WR_STROBE, cfg->wr_strobe);
55 set_config_field(tmp, WR_HOLD, cfg->wr_hold);
56 set_config_field(tmp, RD_SETUP, cfg->rd_setup);
57 set_config_field(tmp, RD_STROBE, cfg->rd_strobe);
58 set_config_field(tmp, RD_HOLD, cfg->rd_hold);
59 set_config_field(tmp, TURN_AROUND, cfg->turn_around);
60 set_config_field(tmp, WIDTH, cfg->width);
62 __raw_writel(tmp, &davinci_emif_regs->abncr[cs]);
65 void init_async_emif(int num_cs, struct async_emif_config *config)
69 for (cs = 0; cs < num_cs; cs++)
70 configure_async_emif(cs, config + cs);