+++ /dev/null
-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,
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