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mtd: nand: mxs_nand: use self init

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Instead of completing initialization via scan_bbt callback use
NAND self init to initialize the GPMI (MXS) NAND controller.

Suggested-by: Scott Wood <oss@buserror.net>
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
This commit is contained in:
Stefan Agner 2018-06-22 17:19:47 +02:00 committed by Stefano Babic
parent 9345943b2b
commit 5346c31e30
3 changed files with 31 additions and 24 deletions
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1
drivers/mtd/nand/Kconfig
View File

@ -143,6 +143,7 @@ config NAND_MXC
config NAND_MXS
bool "MXS NAND support"
depends on MX23 || MX28 || MX6 || MX7
select SYS_NAND_SELF_INIT
imply CMD_NAND
select APBH_DMA
select APBH_DMA_BURST if ARCH_MX6 || ARCH_MX7

53
drivers/mtd/nand/mxs_nand.c
View File

@ -17,6 +17,7 @@
#include <linux/mtd/rawnand.h>
#include <linux/types.h>
#include <malloc.h>
#include <nand.h>
#include <linux/errno.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
@ -47,6 +48,7 @@
#define MXS_NAND_BCH_TIMEOUT 10000
struct mxs_nand_info {
struct nand_chip chip;
int cur_chip;
uint32_t cmd_queue_len;
@ -972,20 +974,15 @@ static int mxs_nand_block_bad(struct mtd_info *mtd, loff_t ofs)
}
/*
* Nominally, the purpose of this function is to look for or create the bad
* block table. In fact, since the we call this function at the very end of
* the initialization process started by nand_scan(), and we doesn't have a
* more formal mechanism, we "hook" this function to continue init process.
*
* At this point, the physical NAND Flash chips have been identified and
* counted, so we know the physical geometry. This enables us to make some
* important configuration decisions.
*
* The return value of this function propagates directly back to this driver's
* call to nand_scan(). Anything other than zero will cause this driver to
* board_nand_init(). Anything other than zero will cause this driver to
* tear everything down and declare failure.
*/
static int mxs_nand_scan_bbt(struct mtd_info *mtd)
int mxs_nand_setup_ecc(struct mtd_info *mtd)
{
struct nand_chip *nand = mtd_to_nand(mtd);
struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
@ -1047,8 +1044,7 @@ static int mxs_nand_scan_bbt(struct mtd_info *mtd)
mtd->_block_markbad = mxs_nand_hook_block_markbad;
}
/* We use the reference implementation for bad block management. */
return nand_default_bbt(mtd);
return 0;
}
/*
@ -1177,7 +1173,6 @@ int mxs_nand_init_spl(struct nand_chip *nand)
nand->cmd_ctrl = mxs_nand_cmd_ctrl;
nand->dev_ready = mxs_nand_device_ready;
nand->select_chip = mxs_nand_select_chip;
nand->scan_bbt = mxs_nand_scan_bbt;
nand->read_byte = mxs_nand_read_byte;
nand->read_buf = mxs_nand_read_buf;
@ -1192,27 +1187,22 @@ int mxs_nand_init_spl(struct nand_chip *nand)
return 0;
}
/*!
* This function is called during the driver binding process.
*
* @param pdev the device structure used to store device specific
* information that is used by the suspend, resume and
* remove functions
*
* @return The function always returns 0.
*/
int board_nand_init(struct nand_chip *nand)
void board_nand_init(void)
{
struct mtd_info *mtd;
struct mxs_nand_info *nand_info;
struct nand_chip *nand;
int err;
nand_info = malloc(sizeof(struct mxs_nand_info));
if (!nand_info) {
printf("MXS NAND: Failed to allocate private data\n");
return -ENOMEM;
return;
}
memset(nand_info, 0, sizeof(struct mxs_nand_info));
nand = &nand_info->chip;
mtd = nand_to_mtd(nand);
err = mxs_nand_alloc_buffers(nand_info);
if (err)
goto err1;
@ -1231,13 +1221,19 @@ int board_nand_init(struct nand_chip *nand)
nand->dev_ready = mxs_nand_device_ready;
nand->select_chip = mxs_nand_select_chip;
nand->block_bad = mxs_nand_block_bad;
nand->scan_bbt = mxs_nand_scan_bbt;
nand->read_byte = mxs_nand_read_byte;
nand->read_buf = mxs_nand_read_buf;
nand->write_buf = mxs_nand_write_buf;
/* first scan to find the device and get the page size */
if (nand_scan_ident(mtd, CONFIG_SYS_MAX_NAND_DEVICE, NULL))
goto err2;
if (mxs_nand_setup_ecc(mtd))
goto err2;
nand->ecc.read_page = mxs_nand_ecc_read_page;
nand->ecc.write_page = mxs_nand_ecc_write_page;
nand->ecc.read_oob = mxs_nand_ecc_read_oob;
@ -1249,12 +1245,21 @@ int board_nand_init(struct nand_chip *nand)
nand->ecc.size = 512;
nand->ecc.strength = 8;
return 0;
/* second phase scan */
err = nand_scan_tail(mtd);
if (err)
goto err2;
err = nand_register(0, mtd);
if (err)
goto err2;
return;
err2:
free(nand_info->data_buf);
free(nand_info->cmd_buf);
err1:
free(nand_info);
return err;
return;
}

1
drivers/mtd/nand/mxs_nand.h
View File

@ -8,3 +8,4 @@
*/
int mxs_nand_init_spl(struct nand_chip *nand);
int mxs_nand_setup_ecc(struct mtd_info *mtd);