1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Keystone2: Asynchronous EMIF Configuration
4 *
5 * (C) Copyright 2012-2014
6 * Texas Instruments Incorporated, <www.ti.com>
7 */
8
9 #include <common.h>
10 #include <asm/ti-common/ti-aemif.h>
11
12 #define AEMIF_WAITCYCLE_CONFIG (KS2_AEMIF_CNTRL_BASE + 0x4)
13 #define AEMIF_NAND_CONTROL (KS2_AEMIF_CNTRL_BASE + 0x60)
14 #define AEMIF_ONENAND_CONTROL (KS2_AEMIF_CNTRL_BASE + 0x5c)
15 #define AEMIF_CONFIG(cs) (KS2_AEMIF_CNTRL_BASE + 0x10 + (cs * 4))
16
17 #define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0)
18 #define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0)
19 #define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26)
20 #define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20)
21 #define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17)
22 #define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13)
23 #define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7)
24 #define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4)
25 #define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2)
26 #define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0)
27
28 #define set_config_field(reg, field, val) \
29 do { \
30 if (val != -1) { \
31 reg &= ~AEMIF_CFG_##field(0xffffffff); \
32 reg |= AEMIF_CFG_##field(val); \
33 } \
34 } while (0)
35
aemif_configure(int cs,struct aemif_config * cfg)36 static void aemif_configure(int cs, struct aemif_config *cfg)
37 {
38 unsigned long tmp;
39
40 if (cfg->mode == AEMIF_MODE_NAND) {
41 tmp = __raw_readl(AEMIF_NAND_CONTROL);
42 tmp |= (1 << cs);
43 __raw_writel(tmp, AEMIF_NAND_CONTROL);
44
45 } else if (cfg->mode == AEMIF_MODE_ONENAND) {
46 tmp = __raw_readl(AEMIF_ONENAND_CONTROL);
47 tmp |= (1 << cs);
48 __raw_writel(tmp, AEMIF_ONENAND_CONTROL);
49 }
50
51 tmp = __raw_readl(AEMIF_CONFIG(cs));
52
53 set_config_field(tmp, SELECT_STROBE, cfg->select_strobe);
54 set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait);
55 set_config_field(tmp, WR_SETUP, cfg->wr_setup);
56 set_config_field(tmp, WR_STROBE, cfg->wr_strobe);
57 set_config_field(tmp, WR_HOLD, cfg->wr_hold);
58 set_config_field(tmp, RD_SETUP, cfg->rd_setup);
59 set_config_field(tmp, RD_STROBE, cfg->rd_strobe);
60 set_config_field(tmp, RD_HOLD, cfg->rd_hold);
61 set_config_field(tmp, TURN_AROUND, cfg->turn_around);
62 set_config_field(tmp, WIDTH, cfg->width);
63
64 __raw_writel(tmp, AEMIF_CONFIG(cs));
65 }
66
aemif_init(int num_cs,struct aemif_config * config)67 void aemif_init(int num_cs, struct aemif_config *config)
68 {
69 int cs;
70
71 if (num_cs > AEMIF_NUM_CS) {
72 num_cs = AEMIF_NUM_CS;
73 printf("AEMIF: csnum has to be <= 5");
74 }
75
76 for (cs = 0; cs < num_cs; cs++)
77 aemif_configure(cs, config + cs);
78 }
79