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 <asm/arch/hardware.h>
10 #include <asm/io.h>
11 #include <asm/ti-common/ti-aemif.h>
12 #include <dm.h>
13 #include "ti-aemif-cs.h"
14
15 #define AEMIF_WAITCYCLE_CONFIG (0x4)
16 #define AEMIF_NAND_CONTROL (0x60)
17 #define AEMIF_ONENAND_CONTROL (0x5c)
18
aemif_configure(int cs,struct aemif_config * cfg)19 static void aemif_configure(int cs, struct aemif_config *cfg)
20 {
21 unsigned long tmp;
22
23 if (cfg->mode == AEMIF_MODE_NAND) {
24 tmp = __raw_readl(cfg->base + AEMIF_NAND_CONTROL);
25 tmp |= (1 << cs);
26 __raw_writel(tmp, cfg->base + AEMIF_NAND_CONTROL);
27
28 } else if (cfg->mode == AEMIF_MODE_ONENAND) {
29 tmp = __raw_readl(cfg->base + AEMIF_ONENAND_CONTROL);
30 tmp |= (1 << cs);
31 __raw_writel(tmp, cfg->base + AEMIF_ONENAND_CONTROL);
32 }
33
34 aemif_cs_configure(cs, cfg);
35 }
36
aemif_init(int num_cs,struct aemif_config * config)37 void aemif_init(int num_cs, struct aemif_config *config)
38 {
39 int cs;
40
41 if (num_cs > AEMIF_NUM_CS) {
42 num_cs = AEMIF_NUM_CS;
43 printf("AEMIF: csnum has to be <= 5");
44 }
45
46 for (cs = 0; cs < num_cs; cs++)
47 aemif_configure(cs, config + cs);
48 }
49
50 static const struct udevice_id aemif_ids[] = {
51 { .compatible = "ti,da850-aemif", },
52 {},
53 };
54
55 U_BOOT_DRIVER(ti_aemif) = {
56 .name = "ti_aemif",
57 .id = UCLASS_MEMORY,
58 .of_match = aemif_ids,
59 };
60