From: Mason Yang <masonccyang@mxic.com.tw>
To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com
Cc: frieder.schrempf@kontron.de, tglx@linutronix.de, stefan@agner.ch,
juliensu@mxic.com.tw, allison@lohutok.net,
linux-kernel@vger.kernel.org, bbrezillon@kernel.org,
rfontana@redhat.com, linux-mtd@lists.infradead.org,
yuehaibing@huawei.com, s.hauer@pengutronix.de,
Mason Yang <masonccyang@mxic.com.tw>
Subject: [PATCH v3 2/4] mtd: rawnand: Add support Macronix Block Protection function
Date: Tue, 3 Mar 2020 15:21:22 +0800 [thread overview]
Message-ID: <1583220084-10890-3-git-send-email-masonccyang@mxic.com.tw> (raw)
In-Reply-To: <1583220084-10890-1-git-send-email-masonccyang@mxic.com.tw>
Macronix AC/AD series support using SET_FEATURES to change
Block Portection and Unprotection. By GET_FEATURES operation
to detect if block protection support.
Signed-off-by: Mason Yang <masonccyang@mxic.com.tw>
---
drivers/mtd/nand/raw/nand_macronix.c | 72 ++++++++++++++++++++++++++++++++++++
1 file changed, 72 insertions(+)
diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c
index 3ff7ce0..a4cd12c 100644
--- a/drivers/mtd/nand/raw/nand_macronix.c
+++ b/drivers/mtd/nand/raw/nand_macronix.c
@@ -11,6 +11,10 @@
#define MACRONIX_READ_RETRY_BIT BIT(0)
#define MACRONIX_NUM_READ_RETRY_MODES 6
+#define ONFI_FEATURE_ADDR_MXIC_PROTECTION 0xA0
+#define MXIC_BLOCK_PROTECTION_ALL_LOCK 0x38
+#define MXIC_BLOCK_PROTECTION_ALL_UNLOCK 0x0
+
struct nand_onfi_vendor_macronix {
u8 reserved;
u8 reliability_func;
@@ -91,6 +95,73 @@ static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip)
ONFI_FEATURE_ADDR_TIMING_MODE, 1);
}
+/*
+ * Macronix NAND supports Block Protection by Protectoin(PT) pin;
+ * active high at power-on which protects the entire chip even the #WP is
+ * disabled. Lock/unlock protection area can be partition according to
+ * protection bits, i.e. upper 1/2 locked, upper 1/4 locked and so on.
+ */
+static int mxic_nand_lock(struct nand_chip *chip, loff_t ofs, uint64_t len)
+{
+ u8 feature[ONFI_SUBFEATURE_PARAM_LEN];
+ int ret;
+
+ feature[0] = MXIC_BLOCK_PROTECTION_ALL_LOCK;
+ nand_select_target(chip, 0);
+ ret = nand_set_features(chip, ONFI_FEATURE_ADDR_MXIC_PROTECTION,
+ feature);
+ nand_deselect_target(chip);
+ if (ret)
+ pr_err("%s all blocks failed\n", __func__);
+
+ return ret;
+}
+
+static int mxic_nand_unlock(struct nand_chip *chip, loff_t ofs, uint64_t len)
+{
+ u8 feature[ONFI_SUBFEATURE_PARAM_LEN];
+ int ret;
+
+ feature[0] = MXIC_BLOCK_PROTECTION_ALL_UNLOCK;
+ nand_select_target(chip, 0);
+ ret = nand_set_features(chip, ONFI_FEATURE_ADDR_MXIC_PROTECTION,
+ feature);
+ nand_deselect_target(chip);
+ if (ret)
+ pr_err("%s all blocks failed\n", __func__);
+
+ return ret;
+}
+
+static void macronix_nand_block_protection_support(struct nand_chip *chip)
+{
+ u8 feature[ONFI_SUBFEATURE_PARAM_LEN];
+ int ret;
+
+ bitmap_set(chip->parameters.get_feature_list,
+ ONFI_FEATURE_ADDR_MXIC_PROTECTION, 1);
+
+ feature[0] = MXIC_BLOCK_PROTECTION_ALL_UNLOCK;
+ nand_select_target(chip, 0);
+ ret = nand_get_features(chip, ONFI_FEATURE_ADDR_MXIC_PROTECTION,
+ feature);
+ nand_deselect_target(chip);
+ if (ret || feature[0] != MXIC_BLOCK_PROTECTION_ALL_LOCK) {
+ if (ret)
+ pr_err("Block protection check failed\n");
+
+ bitmap_clear(chip->parameters.get_feature_list,
+ ONFI_FEATURE_ADDR_MXIC_PROTECTION, 1);
+ return;
+ }
+
+ bitmap_set(chip->parameters.set_feature_list,
+ ONFI_FEATURE_ADDR_MXIC_PROTECTION, 1);
+
+ chip->lock_area = mxic_nand_lock;
+ chip->unlock_area = mxic_nand_unlock;
+}
+
static int macronix_nand_init(struct nand_chip *chip)
{
if (nand_is_slc(chip))
@@ -98,6 +169,7 @@ static int macronix_nand_init(struct nand_chip *chip)
macronix_nand_fix_broken_get_timings(chip);
macronix_nand_onfi_init(chip);
+ macronix_nand_block_protection_support(chip);
return 0;
}
--
1.9.1
next prev parent reply other threads:[~2020-03-03 7:21 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-03 7:21 [PATCH v3 0/4] mtd: rawnand: Add support Macronix Block Portection & Deep Power Down mode Mason Yang
2020-03-03 7:21 ` [PATCH v3 1/4] mtd: rawnand: Add support manufacturer specific lock/unlock operation Mason Yang
2020-03-10 18:30 ` Miquel Raynal
2020-03-10 19:27 ` Boris Brezillon
2020-03-11 2:40 ` masonccyang
2020-03-11 7:25 ` Miquel Raynal
2020-03-03 7:21 ` Mason Yang [this message]
2020-03-03 7:21 ` [PATCH v3 3/4] mtd: rawnand: Add support manufacturer specific suspend/resume operation Mason Yang
2020-03-10 18:30 ` Miquel Raynal
2020-03-10 19:33 ` Boris Brezillon
2020-03-11 5:40 ` masonccyang
2020-03-11 7:43 ` Miquel Raynal
2020-03-11 7:56 ` Boris Brezillon
2020-03-12 1:45 ` masonccyang
2020-03-10 19:39 ` Boris Brezillon
2020-03-10 19:41 ` Boris Brezillon
2020-03-11 6:13 ` masonccyang
2020-03-11 8:01 ` Boris Brezillon
2020-03-12 1:48 ` masonccyang
2020-03-03 7:21 ` [PATCH v3 4/4] mtd: rawnand: Add support Macronix deep power down mode Mason Yang
2020-03-09 13:14 ` [PATCH v3 0/4] mtd: rawnand: Add support Macronix Block Portection & Deep Power Down mode Miquel Raynal
2020-03-10 2:30 ` masonccyang
2020-03-10 7:44 ` Miquel Raynal
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