board: cssi: Add CPU board CMPCPRO
[platform/kernel/u-boot.git] / board / cssi / cmpcpro / nand.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2010-2023 CS GROUP France
4  * Florent TRINH THAI (florent.trinh-thai@csgroup.eu)
5  * Stephane FRANJOU (stephane.franjou@csgroup.eu)
6  */
7
8 #include <config.h>
9 #include <nand.h>
10 #include <linux/bitops.h>
11 #include <linux/mtd/rawnand.h>
12 #include <asm/io.h>
13
14 #define BIT_CLE         BIT(6)
15 #define BIT_ALE         BIT(5)
16
17 static u32 nand_mask(unsigned int ctrl)
18 {
19         return ((ctrl & NAND_CLE) ? BIT_CLE : 0) |
20                ((ctrl & NAND_ALE) ? BIT_ALE : 0);
21 }
22
23 static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl)
24 {
25         immap_t __iomem *immr = (immap_t *)CONFIG_SYS_IMMR;
26         struct nand_chip *chip = mtd_to_nand(mtdinfo);
27
28         if (ctrl & NAND_CTRL_CHANGE)
29                 clrsetbits_be32(&immr->qepio.ioport[2].pdat,
30                                 BIT_CLE | BIT_ALE, nand_mask(ctrl));
31
32         if (cmd != NAND_CMD_NONE)
33                 out_8(chip->IO_ADDR_W, cmd);
34 }
35
36 int board_nand_init(struct nand_chip *nand)
37 {
38         nand->chip_delay        = 60;
39         nand->ecc.mode          = NAND_ECC_SOFT;
40         nand->cmd_ctrl          = nand_hwcontrol;
41
42         return 0;
43 }