1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
* Keystone2: Asynchronous EMIF Configuration
*
* (C) Copyright 2012-2014
* Texas Instruments Incorporated, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/emif_defs.h>
#define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0)
#define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0)
#define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26)
#define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20)
#define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17)
#define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13)
#define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7)
#define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4)
#define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2)
#define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0)
#define set_config_field(reg, field, val) \
do { \
if (val != -1) { \
reg &= ~AEMIF_CFG_##field(0xffffffff); \
reg |= AEMIF_CFG_##field(val); \
} \
} while (0)
void configure_async_emif(int cs, struct async_emif_config *cfg)
{
unsigned long tmp;
if (cfg->mode == ASYNC_EMIF_MODE_NAND) {
tmp = __raw_readl(&davinci_emif_regs->nandfcr);
tmp |= (1 << cs);
__raw_writel(tmp, &davinci_emif_regs->nandfcr);
} else if (cfg->mode == ASYNC_EMIF_MODE_ONENAND) {
tmp = __raw_readl(&davinci_emif_regs->one_nand_cr);
tmp |= (1 << cs);
__raw_writel(tmp, &davinci_emif_regs->one_nand_cr);
}
tmp = __raw_readl(&davinci_emif_regs->abncr[cs]);
set_config_field(tmp, SELECT_STROBE, cfg->select_strobe);
set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait);
set_config_field(tmp, WR_SETUP, cfg->wr_setup);
set_config_field(tmp, WR_STROBE, cfg->wr_strobe);
set_config_field(tmp, WR_HOLD, cfg->wr_hold);
set_config_field(tmp, RD_SETUP, cfg->rd_setup);
set_config_field(tmp, RD_STROBE, cfg->rd_strobe);
set_config_field(tmp, RD_HOLD, cfg->rd_hold);
set_config_field(tmp, TURN_AROUND, cfg->turn_around);
set_config_field(tmp, WIDTH, cfg->width);
__raw_writel(tmp, &davinci_emif_regs->abncr[cs]);
}
void init_async_emif(int num_cs, struct async_emif_config *config)
{
int cs;
for (cs = 0; cs < num_cs; cs++)
configure_async_emif(cs, config + cs);
}
|
