+++ /dev/null
-From 5c5e3963a1b58be1669da5da93f51dc339cd73d7 Mon Sep 17 00:00:00 2001
-From: Boris BREZILLON <b.brezillon.dev@gmail.com>
-Date: Mon, 24 Feb 2014 16:30:22 +0100
-Subject: [PATCH] mtd: nand: Add hynix specific initializer
-
-Add an hynix initiliazer to manage read retries on h27uxgt8t2a chip.
-
-Signed-off-by: Boris BREZILLON <b.brezillon.dev@gmail.com>
-Signed-off-by: Hans de Goede <hdegoede@redhat.com>
----
- drivers/mtd/nand/Makefile | 2 +-
- drivers/mtd/nand/nand_hynix.c | 159 ++++++++++++++++++++++++++++++++++++++++++
- drivers/mtd/nand/nand_ids.c | 3 +-
- include/linux/mtd/nand.h | 2 +
- 4 files changed, 164 insertions(+), 2 deletions(-)
- create mode 100644 drivers/mtd/nand/nand_hynix.c
-
---- a/drivers/mtd/nand/Makefile
-+++ b/drivers/mtd/nand/Makefile
-@@ -5,7 +5,7 @@
- obj-$(CONFIG_MTD_NAND) += nand.o
- obj-$(CONFIG_MTD_NAND_ECC) += nand_ecc.o
- obj-$(CONFIG_MTD_NAND_BCH) += nand_bch.o
--obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o
-+obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o nand_hynix.o
- obj-$(CONFIG_MTD_SM_COMMON) += sm_common.o
-
- obj-$(CONFIG_MTD_NAND_CAFE) += cafe_nand.o
---- /dev/null
-+++ b/drivers/mtd/nand/nand_hynix.c
-@@ -0,0 +1,159 @@
-+/*
-+ * Copyright (C) 2014 Boris BREZILLON <b.brezillon.dev@gmail.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/mtd/nand.h>
-+#include <linux/slab.h>
-+
-+static u8 h27ucg8t2a_read_retry_regs[] = {
-+ 0xcc, 0xbf, 0xaa, 0xab, 0xcd, 0xad, 0xae, 0xaf
-+};
-+
-+struct hynix_read_retry {
-+ u8 *regs;
-+ u8 values[64];
-+};
-+
-+struct hynix_nand {
-+ struct hynix_read_retry read_retry;
-+};
-+
-+int nand_setup_read_retry_hynix(struct mtd_info *mtd, int retry_mode)
-+{
-+ struct nand_chip *chip = mtd->priv;
-+ struct hynix_nand *hynix = chip->manuf_priv;
-+ int offset = retry_mode * 8;
-+ int status;
-+ int i;
-+
-+ chip->cmdfunc(mtd, 0x36, -1, -1);
-+ for (i = 0; i < 8; i++) {
-+ int column = hynix->read_retry.regs[i];
-+ column |= column << 8;
-+ chip->cmdfunc(mtd, NAND_CMD_NONE, column, -1);
-+ chip->write_byte(mtd, hynix->read_retry.values[offset + i]);
-+ }
-+ chip->cmdfunc(mtd, 0x16, -1, -1);
-+
-+ status = chip->waitfunc(mtd, chip);
-+ if (status & NAND_STATUS_FAIL)
-+ return -EIO;
-+
-+ return 0;
-+}
-+
-+static void h27ucg8t2a_cleanup(struct mtd_info *mtd)
-+{
-+ struct nand_chip *chip = mtd->priv;
-+ kfree(chip->manuf_priv);
-+}
-+
-+static int h27ucg8t2a_init(struct mtd_info *mtd, const uint8_t *id)
-+{
-+ struct nand_chip *chip = mtd->priv;
-+ struct hynix_nand *hynix;
-+ u8 * buf = NULL;
-+ int i, j;
-+ int ret;
-+
-+ buf = kzalloc(1024, GFP_KERNEL);
-+ if (!buf)
-+ return -ENOMEM;
-+
-+ chip->select_chip(mtd, 0);
-+ chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
-+ chip->cmdfunc(mtd, 0x36, 0xff, -1);
-+ chip->write_byte(mtd, 0x40);
-+ chip->cmdfunc(mtd, NAND_CMD_NONE, 0xcc, -1);
-+ chip->write_byte(mtd, 0x4d);
-+ chip->cmdfunc(mtd, 0x16, -1, -1);
-+ chip->cmdfunc(mtd, 0x17, -1, -1);
-+ chip->cmdfunc(mtd, 0x04, -1, -1);
-+ chip->cmdfunc(mtd, 0x19, -1, -1);
-+ chip->cmdfunc(mtd, NAND_CMD_READ0, 0x0, 0x200);
-+
-+ chip->read_buf(mtd, buf, 2);
-+ if (buf[0] != 0x8 || buf[1] != 0x8) {
-+ ret = -EINVAL;
-+ goto leave;
-+ }
-+ chip->read_buf(mtd, buf, 1024);
-+
-+ ret = 0;
-+ for (j = 0; j < 8; j++) {
-+ for (i = 0; i < 64; i++) {
-+ u8 *tmp = buf + (128 * j);
-+ if ((tmp[i] | tmp[i + 64]) != 0xff) {
-+ ret = -EINVAL;
-+ goto leave;
-+ }
-+ }
-+ }
-+
-+ chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
-+ chip->cmdfunc(mtd, 0x38, -1, -1);
-+ chip->select_chip(mtd, -1);
-+
-+ if (!ret) {
-+ hynix = kzalloc(sizeof(*hynix), GFP_KERNEL);
-+ if (!hynix) {
-+ ret = -ENOMEM;
-+ goto leave;
-+ }
-+
-+ hynix->read_retry.regs = h27ucg8t2a_read_retry_regs;
-+ memcpy(hynix->read_retry.values, buf, 64);
-+ chip->manuf_priv = hynix;
-+ chip->setup_read_retry = nand_setup_read_retry_hynix;
-+ chip->read_retries = 8;
-+ chip->manuf_cleanup = h27ucg8t2a_cleanup;
-+ }
-+
-+leave:
-+ kfree(buf);
-+
-+ return ret;
-+}
-+
-+struct hynix_nand_initializer {
-+ u8 id[6];
-+ int (*init)(struct mtd_info *mtd, const uint8_t *id);
-+};
-+
-+struct hynix_nand_initializer initializers[] = {
-+ {
-+ .id = {NAND_MFR_HYNIX, 0xde, 0x94, 0xda, 0x74, 0xc4},
-+ .init = h27ucg8t2a_init,
-+ },
-+};
-+
-+int hynix_nand_init(struct mtd_info *mtd, const uint8_t *id)
-+{
-+ int i;
-+
-+ for (i = 0; i < ARRAY_SIZE(initializers); i++) {
-+ struct hynix_nand_initializer *initializer = &initializers[i];
-+ if (memcmp(id, initializer->id, sizeof(initializer->id)))
-+ continue;
-+
-+ return initializer->init(mtd, id);
-+ }
-+
-+ return 0;
-+}
-+EXPORT_SYMBOL(hynix_nand_init);
-+
-+MODULE_LICENSE("GPL");
-+MODULE_AUTHOR("Boris BREZILLON <b.brezillon.dev@gmail.com>");
-+MODULE_DESCRIPTION("Hynix NAND specific code");
---- a/drivers/mtd/nand/nand_ids.c
-+++ b/drivers/mtd/nand/nand_ids.c
-@@ -163,6 +163,7 @@ struct nand_flash_dev nand_flash_ids[] =
- {NULL}
- };
-
-+
- /* Manufacturer IDs */
- struct nand_manufacturers nand_manuf_ids[] = {
- {NAND_MFR_TOSHIBA, "Toshiba"},
-@@ -171,7 +172,7 @@ struct nand_manufacturers nand_manuf_ids
- {NAND_MFR_NATIONAL, "National"},
- {NAND_MFR_RENESAS, "Renesas"},
- {NAND_MFR_STMICRO, "ST Micro"},
-- {NAND_MFR_HYNIX, "Hynix"},
-+ {NAND_MFR_HYNIX, "Hynix", hynix_nand_init},
- {NAND_MFR_MICRON, "Micron"},
- {NAND_MFR_AMD, "AMD/Spansion"},
- {NAND_MFR_MACRONIX, "Macronix"},
---- a/include/linux/mtd/nand.h
-+++ b/include/linux/mtd/nand.h
-@@ -959,6 +959,8 @@ struct nand_manufacturers {
- extern struct nand_flash_dev nand_flash_ids[];
- extern struct nand_manufacturers nand_manuf_ids[];
-
-+int hynix_nand_init(struct mtd_info *mtd, const uint8_t *id);
-+
- extern int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd);
- extern int nand_default_bbt(struct mtd_info *mtd);
- extern int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs);
projects / openwrt / staging / lynxis / omap.git / blobdiff