diff options
| -rw-r--r-- | target/linux/ramips/patches-3.18/0075-mtk_nand_alloc_buffer.patch | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.18/0075-mtk_nand_alloc_buffer.patch b/target/linux/ramips/patches-3.18/0075-mtk_nand_alloc_buffer.patch new file mode 100644 index 0000000000..ac20198ace --- /dev/null +++ b/target/linux/ramips/patches-3.18/0075-mtk_nand_alloc_buffer.patch @@ -0,0 +1,179 @@ +From patchwork Fri Nov 13 07:55:08 2015 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +Subject: [OpenWrt-Devel,RFC] A patch for mt7621 nand controler. Revision 2. +From: Kirill Berezin <fyiwdt@gmail.com> +X-Patchwork-Id: 544092 +Message-Id: <CAOFwh=DZieEa4ZA0ex6G3OR2OgEeP6Fh+SSw=Zg-L0wWm1QRTA@mail.gmail.com> +To: openwrt-devel@lists.openwrt.org +Date: Fri, 13 Nov 2015 10:55:08 +0300 + +Hello, + +It turned out that mtk_nand driver uses some sophisticated accounting and a +general nand code must be patched. + +This patch adds required read and erase calls to a general nand code. I +used a code for re6500 released by Linksys as a reference. + +All required operations (erase, write and read) are usable. However I found +that jffs2 filesystem can be created only on top of a ubi volume. I tried +to create jffs2 directly on mtd device but pages with clean markers are +became uncorrectable. + +This patch also includes changes that I sent earlier. + +Best regards, +Kirill. + +Signed-off-by: Kirill Berezin (fyiwdt@gmail.com) + +diff -urNb a/drivers/mtd/nand/mtk_nand.c b/drivers/mtd/nand/mtk_nand.c +--- a/drivers/mtd/nand/mtk_nand.c 2015-11-06 16:44:31.000000000 +0400 ++++ b/drivers/mtd/nand/mtk_nand.c 2015-11-12 10:06:20.080430855 +0400 +@@ -110,6 +110,10 @@ + 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 @@ + 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 @@ + { + 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 @@ + 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 @@ + 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 @@ + 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 @@ + { + 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(); + +diff -urNb a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c +--- a/drivers/mtd/nand/nand_base.c 2015-11-06 16:44:31.000000000 +0400 ++++ b/drivers/mtd/nand/nand_base.c 2015-11-09 10:24:52.931720862 +0400 +@@ -1575,6 +1575,9 @@ + __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); + + /* +@@ -1593,6 +1596,7 @@ + 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 */ +@@ -2770,8 +2774,11 @@ + 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 +diff -urNb a/drivers/mtd/nand/nand_device_list.h b/drivers/mtd/nand/nand_device_list.h +--- a/drivers/mtd/nand/nand_device_list.h 2015-11-06 16:44:31.000000000 +0400 ++++ b/drivers/mtd/nand/nand_device_list.h 2015-11-06 11:13:26.000000000 +0400 +@@ -43,6 +43,8 @@ + {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}, +diff -urNb a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h +--- a/include/linux/mtd/nand.h 2015-11-06 16:44:30.000000000 +0400 ++++ b/include/linux/mtd/nand.h 2015-11-09 10:18:55.704701886 +0400 +@@ -653,6 +653,10 @@ + 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, |