Remove unnecessary instances of DECLARE_GLOBAL_DATA_PTR
[pandora-u-boot.git] / board / freescale / m5373evb / nand.c
1 /*
2  * (C) Copyright 2000-2003
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
6  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
7  *
8  * SPDX-License-Identifier:     GPL-2.0+
9  */
10
11 #include <config.h>
12 #include <common.h>
13 #include <asm/io.h>
14 #include <asm/immap.h>
15
16 #if defined(CONFIG_CMD_NAND)
17 #include <nand.h>
18 #include <linux/mtd/mtd.h>
19
20 #define SET_CLE         0x10
21 #define SET_ALE         0x08
22
23 static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl)
24 {
25         struct nand_chip *this = mtd_to_nand(mtdinfo);
26         volatile u16 *nCE = (u16 *) CONFIG_SYS_LATCH_ADDR;
27
28         if (ctrl & NAND_CTRL_CHANGE) {
29                 ulong IO_ADDR_W = (ulong) this->IO_ADDR_W;
30
31                 IO_ADDR_W &= ~(SET_ALE | SET_CLE);
32
33                 if (ctrl & NAND_NCE)
34                         *nCE &= 0xFFFB;
35                 else
36                         *nCE |= 0x0004;
37
38                 if (ctrl & NAND_CLE)
39                         IO_ADDR_W |= SET_CLE;
40                 if (ctrl & NAND_ALE)
41                         IO_ADDR_W |= SET_ALE;
42
43                 this->IO_ADDR_W = (void *)IO_ADDR_W;
44
45         }
46
47         if (cmd != NAND_CMD_NONE)
48                 writeb(cmd, this->IO_ADDR_W);
49 }
50
51 int board_nand_init(struct nand_chip *nand)
52 {
53         gpio_t *gpio = (gpio_t *) MMAP_GPIO;
54         fbcs_t *fbcs = (fbcs_t *) MMAP_FBCS;
55
56         clrbits_be32(&fbcs->csmr2, FBCS_CSMR_WP);
57
58         /*
59          * set up pin configuration - enabled 2nd output buffer's signals
60          * (nand_ngpio - nCE USB1/2_PWR_EN, LATCH_GPIOs, LCD_VEEEN, etc)
61          * to use nCE signal
62          */
63         clrbits_8(&gpio->par_timer, GPIO_PAR_TIN3_TIN3);
64         setbits_8(&gpio->pddr_timer, 0x08);
65         setbits_8(&gpio->ppd_timer, 0x08);
66         out_8(&gpio->pclrr_timer, 0);
67         out_8(&gpio->podr_timer, 0);
68
69         nand->chip_delay = 60;
70         nand->ecc.mode = NAND_ECC_SOFT;
71         nand->cmd_ctrl = nand_hwcontrol;
72
73         return 0;
74 }
75 #endif