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// SPDX-License-Identifier: GPL-2.0
/*
* (C) Copyright 2005
* 2N Telekomunikace, a.s. <www.2n.cz>
* Ladislav Michl <michl@2n.cz>
*/
#include <common.h>
#include <nand.h>
#include <errno.h>
#include <linux/mtd/concat.h>
#include <linux/mtd/rawnand.h>
#ifndef CFG_SYS_NAND_BASE_LIST
#define CFG_SYS_NAND_BASE_LIST { CFG_SYS_NAND_BASE }
#endif
int nand_curr_device = -1;
static struct mtd_info *nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
#if !CONFIG_IS_ENABLED(SYS_NAND_SELF_INIT)
static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
static ulong base_address[CONFIG_SYS_MAX_NAND_DEVICE] = CFG_SYS_NAND_BASE_LIST;
#endif
static char dev_name[CONFIG_SYS_MAX_NAND_DEVICE][8];
static unsigned long total_nand_size; /* in kiB */
struct mtd_info *get_nand_dev_by_index(int dev)
{
if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE || !nand_info[dev] ||
!nand_info[dev]->name)
return NULL;
return nand_info[dev];
}
int nand_mtd_to_devnum(struct mtd_info *mtd)
{
int i;
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
if (mtd && get_nand_dev_by_index(i) == mtd)
return i;
}
return -ENODEV;
}
/* Register an initialized NAND mtd device with the U-Boot NAND command. */
int nand_register(int devnum, struct mtd_info *mtd)
{
if (devnum >= CONFIG_SYS_MAX_NAND_DEVICE)
return -EINVAL;
nand_info[devnum] = mtd;
sprintf(dev_name[devnum], "nand%d", devnum);
mtd->name = dev_name[devnum];
/*
* Add MTD device so that we can reference it later
* via the mtdcore infrastructure (e.g. ubi).
*/
add_mtd_device(mtd);
total_nand_size += mtd->size / 1024;
if (nand_curr_device == -1)
nand_curr_device = devnum;
return 0;
}
void nand_unregister(struct mtd_info *mtd)
{
int devnum = nand_mtd_to_devnum(mtd);
if (devnum < 0)
return;
if (nand_curr_device == devnum)
nand_curr_device = -1;
total_nand_size -= mtd->size / 1024;
del_mtd_device(nand_info[devnum]);
nand_info[devnum] = NULL;
}
#if !CONFIG_IS_ENABLED(SYS_NAND_SELF_INIT)
static void nand_init_chip(int i)
{
struct nand_chip *nand = &nand_chip[i];
struct mtd_info *mtd = nand_to_mtd(nand);
ulong base_addr = base_address[i];
int maxchips = CONFIG_SYS_NAND_MAX_CHIPS;
if (maxchips < 1)
maxchips = 1;
nand->IO_ADDR_R = nand->IO_ADDR_W = (void __iomem *)base_addr;
if (board_nand_init(nand))
return;
if (nand_scan(mtd, maxchips))
return;
nand_register(i, mtd);
}
#endif
#ifdef CONFIG_MTD_CONCAT
struct mtd_info *concat_mtd;
static void create_mtd_concat(void)
{
struct mtd_info *nand_info_list[CONFIG_SYS_MAX_NAND_DEVICE];
int nand_devices_found = 0;
int i;
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
struct mtd_info *mtd = get_nand_dev_by_index(i);
if (mtd != NULL) {
nand_info_list[nand_devices_found] = mtd;
nand_devices_found++;
}
}
if (nand_devices_found > 1) {
char c_mtd_name[16];
/*
* We detected multiple devices. Concatenate them together.
*/
sprintf(c_mtd_name, "nand%d", nand_devices_found);
concat_mtd = mtd_concat_create(nand_info_list,
nand_devices_found, c_mtd_name);
if (!concat_mtd)
return;
nand_register(nand_devices_found, concat_mtd);
}
return;
}
static void destroy_mtd_concat(void)
{
if (!concat_mtd)
return;
mtd_concat_destroy(concat_mtd);
concat_mtd = NULL;
}
#else
static void create_mtd_concat(void)
{
}
static void destroy_mtd_concat(void)
{
}
#endif
unsigned long nand_size(void)
{
return total_nand_size;
}
static int initialized;
void nand_init(void)
{
/*
* Avoid initializing NAND Flash multiple times,
* otherwise it will calculate a wrong total size.
*/
if (initialized)
return;
initialized = 1;
#if CONFIG_IS_ENABLED(SYS_NAND_SELF_INIT)
board_nand_init();
#else
int i;
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
nand_init_chip(i);
#endif
#ifdef CONFIG_SYS_NAND_SELECT_DEVICE
/*
* Select the chip in the board/cpu specific driver
*/
board_nand_select_device(mtd_to_nand(get_nand_dev_by_index(nand_curr_device)),
nand_curr_device);
#endif
create_mtd_concat();
}
void nand_reinit(void)
{
int i;
destroy_mtd_concat();
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
assert(!nand_info[i]);
initialized = 0;
nand_init();
}
unsigned int nand_page_size(void)
{
struct mtd_info *mtd = get_nand_dev_by_index(nand_curr_device);
return mtd ? mtd->writesize : 1;
}
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