Add qemu 2.4.0
[kvmfornfv.git] / qemu / roms / u-boot / board / freescale / m5329evb / 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 DECLARE_GLOBAL_DATA_PTR;
17
18 #if defined(CONFIG_CMD_NAND)
19 #include <nand.h>
20 #include <linux/mtd/mtd.h>
21
22 #define SET_CLE         0x10
23 #define SET_ALE         0x08
24
25 static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl)
26 {
27         struct nand_chip *this = mtdinfo->priv;
28         volatile u16 *nCE = (u16 *) CONFIG_SYS_LATCH_ADDR;
29
30         if (ctrl & NAND_CTRL_CHANGE) {
31                 ulong IO_ADDR_W = (ulong) this->IO_ADDR_W;
32
33                 IO_ADDR_W &= ~(SET_ALE | SET_CLE);
34
35                 if (ctrl & NAND_NCE)
36                         *nCE &= 0xFFFB;
37                 else
38                         *nCE |= 0x0004;
39
40                 if (ctrl & NAND_CLE)
41                         IO_ADDR_W |= SET_CLE;
42                 if (ctrl & NAND_ALE)
43                         IO_ADDR_W |= SET_ALE;
44
45                 this->IO_ADDR_W = (void *)IO_ADDR_W;
46         }
47
48         if (cmd != NAND_CMD_NONE)
49                 writeb(cmd, this->IO_ADDR_W);
50 }
51
52 int board_nand_init(struct nand_chip *nand)
53 {
54         gpio_t *gpio = (gpio_t *) MMAP_GPIO;
55
56         /*
57          * set up pin configuration - enabled 2nd output buffer's signals
58          * (nand_ngpio - nCE USB1/2_PWR_EN, LATCH_GPIOs, LCD_VEEEN, etc)
59          * to use nCE signal
60          */
61         clrbits_8(&gpio->par_timer, GPIO_PAR_TIN3_TIN3);
62         setbits_8(&gpio->pddr_timer, 0x08);
63         setbits_8(&gpio->ppd_timer, 0x08);
64         out_8(&gpio->pclrr_timer, 0);
65         out_8(&gpio->podr_timer, 0);
66
67         nand->chip_delay = 60;
68         nand->ecc.mode = NAND_ECC_SOFT;
69         nand->cmd_ctrl = nand_hwcontrol;
70
71         return 0;
72 }
73 #endif