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