]>
git.ipfire.org Git - people/ms/u-boot.git/blob - board/sc3/sc3nand.c
3 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
10 #if defined(CONFIG_CMD_NAND)
13 #include <asm/processor.h>
15 #define readb(addr) *(volatile u_char *)(addr)
16 #define readl(addr) *(volatile u_long *)(addr)
17 #define writeb(d,addr) *(volatile u_char *)(addr) = (d)
19 #define SC3_NAND_ALE 29 /* GPIO PIN 3 */
20 #define SC3_NAND_CLE 30 /* GPIO PIN 2 */
21 #define SC3_NAND_CE 27 /* GPIO PIN 5 */
23 static void *sc3_io_base
;
24 static void *sc3_control_base
= (void *)0xEF600700;
26 static void sc3_nand_hwcontrol(struct mtd_info
*mtd
, int cmd
, unsigned int ctrl
)
28 struct nand_chip
*this = mtd
->priv
;
29 if (ctrl
& NAND_CTRL_CHANGE
) {
30 if ( ctrl
& NAND_CLE
)
31 set_bit (SC3_NAND_CLE
, sc3_control_base
);
33 clear_bit (SC3_NAND_CLE
, sc3_control_base
);
34 if ( ctrl
& NAND_ALE
)
35 set_bit (SC3_NAND_ALE
, sc3_control_base
);
37 clear_bit (SC3_NAND_ALE
, sc3_control_base
);
38 if ( ctrl
& NAND_NCE
)
39 set_bit (SC3_NAND_CE
, sc3_control_base
);
41 clear_bit (SC3_NAND_CE
, sc3_control_base
);
44 if (cmd
!= NAND_CMD_NONE
)
45 writeb(cmd
, this->IO_ADDR_W
);
48 static int sc3_nand_dev_ready(struct mtd_info
*mtd
)
50 if (!(readl(sc3_control_base
+ 0x1C) & 0x4000))
55 static void sc3_select_chip(struct mtd_info
*mtd
, int chip
)
57 clear_bit (SC3_NAND_CE
, sc3_control_base
);
60 int board_nand_init(struct nand_chip
*nand
)
62 nand
->ecc
.mode
= NAND_ECC_SOFT
;
64 sc3_io_base
= (void *) CONFIG_SYS_NAND_BASE
;
65 /* Set address of NAND IO lines (Using Linear Data Access Region) */
66 nand
->IO_ADDR_R
= (void __iomem
*) sc3_io_base
;
67 nand
->IO_ADDR_W
= (void __iomem
*) sc3_io_base
;
68 /* Reference hardware control function */
69 nand
->cmd_ctrl
= sc3_nand_hwcontrol
;
70 nand
->dev_ready
= sc3_nand_dev_ready
;
71 nand
->select_chip
= sc3_select_chip
;