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https://github.com/AsahiLinux/u-boot
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578931b34d
This allows a driver to run code between nand_scan_ident() and nand_scan_tail(), among other things. See the additions to doc/README.nand for details. To allow a gradual transition, Boards that don't set CONFIG_SYS_NAND_SELF_INIT will still be initialized the old way, but new drivers should not require this, and existing drivers should be converted when convenient. Signed-off-by: Scott Wood <scottwood@freescale.com>
120 lines
2.8 KiB
C
120 lines
2.8 KiB
C
/*
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* (C) Copyright 2005
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* 2N Telekomunikace, a.s. <www.2n.cz>
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* Ladislav Michl <michl@2n.cz>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <nand.h>
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#include <errno.h>
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#ifndef CONFIG_SYS_NAND_BASE_LIST
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#define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE }
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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int nand_curr_device = -1;
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nand_info_t nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
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#ifndef CONFIG_SYS_NAND_SELF_INIT
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static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
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static ulong base_address[CONFIG_SYS_MAX_NAND_DEVICE] = CONFIG_SYS_NAND_BASE_LIST;
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#endif
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static char dev_name[CONFIG_SYS_MAX_NAND_DEVICE][8];
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static unsigned long total_nand_size; /* in kiB */
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/* Register an initialized NAND mtd device with the U-Boot NAND command. */
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int nand_register(int devnum)
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{
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struct mtd_info *mtd;
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if (devnum >= CONFIG_SYS_MAX_NAND_DEVICE)
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return -EINVAL;
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mtd = &nand_info[devnum];
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sprintf(dev_name[devnum], "nand%d", devnum);
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mtd->name = dev_name[devnum];
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#ifdef CONFIG_MTD_DEVICE
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/*
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* Add MTD device so that we can reference it later
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* via the mtdcore infrastructure (e.g. ubi).
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*/
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add_mtd_device(mtd);
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#endif
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total_nand_size += mtd->size / 1024;
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if (nand_curr_device == -1)
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nand_curr_device = devnum;
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return 0;
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}
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#ifndef CONFIG_SYS_NAND_SELF_INIT
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static void nand_init_chip(int i)
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{
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struct mtd_info *mtd = &nand_info[i];
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struct nand_chip *nand = &nand_chip[i];
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ulong base_addr = base_address[i];
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int maxchips = CONFIG_SYS_NAND_MAX_CHIPS;
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if (maxchips < 1)
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maxchips = 1;
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mtd->priv = nand;
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nand->IO_ADDR_R = nand->IO_ADDR_W = (void __iomem *)base_addr;
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if (board_nand_init(nand))
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return;
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if (nand_scan(mtd, maxchips))
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return;
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nand_register(i);
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}
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#endif
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void nand_init(void)
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{
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#ifdef CONFIG_SYS_NAND_SELF_INIT
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board_nand_init();
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#else
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int i;
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for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
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nand_init_chip(i);
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#endif
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printf("%lu MiB\n", total_nand_size / 1024);
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#ifdef CONFIG_SYS_NAND_SELECT_DEVICE
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/*
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* Select the chip in the board/cpu specific driver
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*/
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board_nand_select_device(nand_info[nand_curr_device].priv, nand_curr_device);
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#endif
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}
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