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openwrt/target/linux/ramips/patches-4.3/0040-nand-add-mtk-nand-hack...

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From 61e17c2f864698033f4661e1fc7ba63d4d982491 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Mon, 7 Dec 2015 17:21:55 +0100
Subject: [PATCH 40/53] nand: add mtk-nand hack/hook
Signed-off-by: John Crispin <blogic@openwrt.org>
---
drivers/mtd/nand/mtk_nand.c | 34 ++++++++++++++++++++++++++++++----
drivers/mtd/nand/nand_base.c | 9 ++++++++-
drivers/mtd/nand/nand_device_list.h | 2 ++
include/linux/mtd/nand.h | 4 ++++
4 files changed, 44 insertions(+), 5 deletions(-)
--- a/drivers/mtd/nand/mtk_nand.c
+++ b/drivers/mtd/nand/mtk_nand.c
@@ -110,6 +110,10 @@ int part_num = NUM_PARTITIONS;
int manu_id;
int dev_id;
+/* this constant was taken from linux/nand/nand.h v 3.14
+ * in later versions it seems it was removed in order to save a bit of space
+ */
+#define NAND_MAX_OOBSIZE 774
static u8 local_oob_buf[NAND_MAX_OOBSIZE];
static u8 nand_badblock_offset = 0;
@@ -348,7 +352,7 @@ mtk_nand_check_bch_error(struct mtd_info
if (0xF == u4ErrNum) {
mtd->ecc_stats.failed++;
bRet = false;
- //printk(KERN_ERR"UnCorrectable at PageAddr=%d\n", u4PageAddr);
+ printk(KERN_ERR"mtk_nand: UnCorrectable at PageAddr=%d\n", u4PageAddr);
} else {
for (i = 0; i < ((u4ErrNum + 1) >> 1); ++i) {
au4ErrBitLoc[i] = DRV_Reg32(ECC_DECEL0_REG32 + i);
@@ -1422,7 +1426,7 @@ mtk_nand_erase_hw(struct mtd_info *mtd,
{
struct nand_chip *chip = (struct nand_chip *)mtd->priv;
- chip->erase_cmd(mtd, page);
+ chip->erase(mtd, page);
return chip->waitfunc(mtd, chip);
}
@@ -2094,8 +2098,8 @@ mtk_nand_probe(struct platform_device *p
nand_chip->write_page = mtk_nand_write_page;
nand_chip->ecc.write_oob = mtk_nand_write_oob;
nand_chip->block_markbad = mtk_nand_block_markbad; // need to add nand_get_device()/nand_release_device().
- // nand_chip->erase = mtk_nand_erase;
- // nand_chip->read_page = mtk_nand_read_page;
+ nand_chip->erase_mtk = mtk_nand_erase;
+ nand_chip->read_page = mtk_nand_read_page;
nand_chip->ecc.read_oob = mtk_nand_read_oob;
nand_chip->block_bad = mtk_nand_block_bad;
@@ -2175,6 +2179,21 @@ mtk_nand_probe(struct platform_device *p
nand_chip->pagemask = (nand_chip->chipsize >> nand_chip->page_shift) - 1;
nand_chip->phys_erase_shift = ffs(mtd->erasesize) - 1;
nand_chip->chip_shift = ffs(nand_chip->chipsize) - 1;//0x1C;//ffs(nand_chip->chipsize) - 1;
+
+ /* allocate buffers or call select_chip here or a bit earlier*/
+ {
+ struct nand_buffers *nbuf = kzalloc(sizeof(*nbuf) + mtd->writesize + mtd->oobsize * 3, GFP_KERNEL);
+ if (!nbuf) {
+ return -ENOMEM;
+ }
+ nbuf->ecccalc = (uint8_t *)(nbuf + 1);
+ nbuf->ecccode = nbuf->ecccalc + mtd->oobsize;
+ nbuf->databuf = nbuf->ecccode + mtd->oobsize;
+
+ nand_chip->buffers = nbuf;
+ nand_chip->options |= NAND_OWN_BUFFERS;
+ }
+
nand_chip->oob_poi = nand_chip->buffers->databuf + mtd->writesize;
nand_chip->badblockpos = 0;
@@ -2251,6 +2270,9 @@ out:
MSG(INIT, "[NFI] mtk_nand_probe fail, err = %d!\n", err);
nand_release(mtd);
platform_set_drvdata(pdev, NULL);
+ if ( NULL != nand_chip->buffers) {
+ kfree(nand_chip->buffers);
+ }
kfree(host);
nand_disable_clock();
return err;
@@ -2261,8 +2283,12 @@ mtk_nand_remove(struct platform_device *
{
struct mtk_nand_host *host = platform_get_drvdata(pdev);
struct mtd_info *mtd = &host->mtd;
+ struct nand_chip *nand_chip = &host->nand_chip;
nand_release(mtd);
+ if ( NULL != nand_chip->buffers) {
+ kfree(nand_chip->buffers);
+ }
kfree(host);
nand_disable_clock();
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1592,6 +1592,9 @@ static int nand_do_read_ops(struct mtd_i
__func__, buf);
read_retry:
+#ifdef CONFIG_MTK_MTD_NAND
+ ret = chip->read_page(mtd, chip, bufpoi, page);
+#else
chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
/*
@@ -1610,6 +1613,7 @@ read_retry:
else
ret = chip->ecc.read_page(mtd, chip, bufpoi,
oob_required, page);
+#endif /* CONFIG_MTK_MTD_NAND */
if (ret < 0) {
if (use_bufpoi)
/* Invalidate page cache */
@@ -2786,8 +2790,11 @@ int nand_erase_nand(struct mtd_info *mtd
if (page <= chip->pagebuf && chip->pagebuf <
(page + pages_per_block))
chip->pagebuf = -1;
-
+#ifdef CONFIG_MTK_MTD_NAND
+ status = chip->erase_mtk(mtd, page & chip->pagemask);
+#else
status = chip->erase(mtd, page & chip->pagemask);
+#endif /* CONFIG_MTK_MTD_NAND */
/*
* See if operation failed and additional status checks are
--- a/drivers/mtd/nand/nand_device_list.h
+++ b/drivers/mtd/nand/nand_device_list.h
@@ -43,6 +43,8 @@ static const flashdev_info gen_FlashTabl
{0xADBC, 0x905554, 5, 16, 512, 128, 2048, 64, 0x10801011, "H9DA4GH4JJAMC", 0},
{0x01F1, 0x801D01, 4, 8, 128, 128, 2048, 64, 0x30C77fff, "S34ML01G100TF", 0},
{0x92F1, 0x8095FF, 4, 8, 128, 128, 2048, 64, 0x30C77fff, "F59L1G81A", 0},
+ {0xC8DA, 0x909544, 5, 8, 256, 128, 2048, 64, 0x30C77fff, "F59L2G81A", 0},
+ {0xC8DC, 0x909554, 5, 8, 512, 128, 2048, 64, 0x30C77fff, "F59L4G81A", 0},
{0xECD3, 0x519558, 5, 8, 1024, 128, 2048, 64, 0x44333, "K9K8G8000", 0},
{0xC2F1, 0x801DC2, 4, 8, 128, 128, 2048, 64, 0x30C77fff, "MX30LF1G08AA", 0},
{0x98D3, 0x902676, 5, 8, 1024, 256, 4096, 224, 0x00C25332, "TC58NVG3S0F", 0},
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -671,6 +671,10 @@ struct nand_chip {
int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
uint32_t offset, int data_len, const uint8_t *buf,
int oob_required, int page, int cached, int raw);
+#ifdef CONFIG_MTK_MTD_NAND
+ int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip, u8 *buf, int page);
+ int (*erase_mtk)(struct mtd_info *mtd, int page);
+#endif /* CONFIG_MTK_MTD_NAND */
int (*onfi_set_features)(struct mtd_info *mtd, struct nand_chip *chip,
int feature_addr, uint8_t *subfeature_para);
int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip,
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