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Mike Frysingercd844232009-05-25 22:42:28 -04001/*
2 * Genericish driver for memory mapped NAND devices
3 *
4 * Copyright (c) 2006-2009 Analog Devices Inc.
5 * Licensed under the GPL-2 or later.
6 */
7
8/* Your board must implement the following macros:
9 * NAND_PLAT_WRITE_CMD(chip, cmd)
10 * NAND_PLAT_WRITE_ADR(chip, cmd)
11 * NAND_PLAT_INIT()
12 *
13 * It may also implement the following:
14 * NAND_PLAT_DEV_READY(chip)
15 */
16
17#include <common.h>
18#include <asm/io.h>
Mike Frysingerbc1a8842010-07-05 04:55:04 -040019#ifdef NAND_PLAT_GPIO_DEV_READY
20# include <asm/gpio.h>
21# define NAND_PLAT_DEV_READY(chip) gpio_get_value(NAND_PLAT_GPIO_DEV_READY)
22#endif
Mike Frysingercd844232009-05-25 22:42:28 -040023
24#include <nand.h>
25
26static void plat_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
27{
Scott Wood17cb4b82016-05-30 13:57:56 -050028 struct nand_chip *this = mtd_to_nand(mtd);
Mike Frysingercd844232009-05-25 22:42:28 -040029
30 if (cmd == NAND_CMD_NONE)
31 return;
32
33 if (ctrl & NAND_CLE)
34 NAND_PLAT_WRITE_CMD(this, cmd);
35 else
36 NAND_PLAT_WRITE_ADR(this, cmd);
37}
38
39#ifdef NAND_PLAT_DEV_READY
40static int plat_dev_ready(struct mtd_info *mtd)
41{
Scott Wood17cb4b82016-05-30 13:57:56 -050042 return NAND_PLAT_DEV_READY((struct nand_chip *)mtd_to_nand(mtd));
Mike Frysingercd844232009-05-25 22:42:28 -040043}
44#else
45# define plat_dev_ready NULL
46#endif
47
48int board_nand_init(struct nand_chip *nand)
49{
Mike Frysingerbc1a8842010-07-05 04:55:04 -040050#ifdef NAND_PLAT_GPIO_DEV_READY
51 gpio_request(NAND_PLAT_GPIO_DEV_READY, "nand-plat");
52 gpio_direction_input(NAND_PLAT_GPIO_DEV_READY);
53#endif
54
55#ifdef NAND_PLAT_INIT
Mike Frysingercd844232009-05-25 22:42:28 -040056 NAND_PLAT_INIT();
Mike Frysingerbc1a8842010-07-05 04:55:04 -040057#endif
Mike Frysingercd844232009-05-25 22:42:28 -040058
59 nand->cmd_ctrl = plat_cmd_ctrl;
60 nand->dev_ready = plat_dev_ready;
61 nand->ecc.mode = NAND_ECC_SOFT;
62
63 return 0;
64}