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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/include/linux/mtd/flashchip.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/include/linux/mtd/flashchip.h')
-rw-r--r--kernel/include/linux/mtd/flashchip.h112
1 files changed, 112 insertions, 0 deletions
diff --git a/kernel/include/linux/mtd/flashchip.h b/kernel/include/linux/mtd/flashchip.h
new file mode 100644
index 000000000..b63fa457f
--- /dev/null
+++ b/kernel/include/linux/mtd/flashchip.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright © 2000 Red Hat UK Limited
+ * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifndef __MTD_FLASHCHIP_H__
+#define __MTD_FLASHCHIP_H__
+
+/* For spinlocks. sched.h includes spinlock.h from whichever directory it
+ * happens to be in - so we don't have to care whether we're on 2.2, which
+ * has asm/spinlock.h, or 2.4, which has linux/spinlock.h
+ */
+#include <linux/sched.h>
+#include <linux/mutex.h>
+
+typedef enum {
+ FL_READY,
+ FL_STATUS,
+ FL_CFI_QUERY,
+ FL_JEDEC_QUERY,
+ FL_ERASING,
+ FL_ERASE_SUSPENDING,
+ FL_ERASE_SUSPENDED,
+ FL_WRITING,
+ FL_WRITING_TO_BUFFER,
+ FL_OTP_WRITE,
+ FL_WRITE_SUSPENDING,
+ FL_WRITE_SUSPENDED,
+ FL_PM_SUSPENDED,
+ FL_SYNCING,
+ FL_UNLOADING,
+ FL_LOCKING,
+ FL_UNLOCKING,
+ FL_POINT,
+ FL_XIP_WHILE_ERASING,
+ FL_XIP_WHILE_WRITING,
+ FL_SHUTDOWN,
+ /* These 2 come from nand_state_t, which has been unified here */
+ FL_READING,
+ FL_CACHEDPRG,
+ /* These 4 come from onenand_state_t, which has been unified here */
+ FL_RESETING,
+ FL_OTPING,
+ FL_PREPARING_ERASE,
+ FL_VERIFYING_ERASE,
+
+ FL_UNKNOWN
+} flstate_t;
+
+
+
+/* NOTE: confusingly, this can be used to refer to more than one chip at a time,
+ if they're interleaved. This can even refer to individual partitions on
+ the same physical chip when present. */
+
+struct flchip {
+ unsigned long start; /* Offset within the map */
+ // unsigned long len;
+ /* We omit len for now, because when we group them together
+ we insist that they're all of the same size, and the chip size
+ is held in the next level up. If we get more versatile later,
+ it'll make it a damn sight harder to find which chip we want from
+ a given offset, and we'll want to add the per-chip length field
+ back in.
+ */
+ int ref_point_counter;
+ flstate_t state;
+ flstate_t oldstate;
+
+ unsigned int write_suspended:1;
+ unsigned int erase_suspended:1;
+ unsigned long in_progress_block_addr;
+
+ struct mutex mutex;
+ wait_queue_head_t wq; /* Wait on here when we're waiting for the chip
+ to be ready */
+ int word_write_time;
+ int buffer_write_time;
+ int erase_time;
+
+ int word_write_time_max;
+ int buffer_write_time_max;
+ int erase_time_max;
+
+ void *priv;
+};
+
+/* This is used to handle contention on write/erase operations
+ between partitions of the same physical chip. */
+struct flchip_shared {
+ struct mutex lock;
+ struct flchip *writing;
+ struct flchip *erasing;
+};
+
+
+#endif /* __MTD_FLASHCHIP_H__ */