Add a driver for flash memory that implements to the Common Flash

Memory Interface (CFI). The flash memory can be read and written
to through /dev/cfi# and an ioctl() exists so processes can read
the query information.
The driver supports the AMD and Intel command set, though only
the AMD command has been tested.

Obtained from:	Juniper Networks, Inc.

1 files changed, 77 insertions, 0 deletions

diff --git a/sys/dev/cfi/cfi_var.h b/sys/dev/cfi/cfi_var.h
new file mode 100644
index 000000000000..5c99702df622
--- /dev/null
+++ b/sys/dev/cfi/cfi_var.h
@@ -0,0 +1,77 @@
+/*-
+ * Copyright (c) 2007, Juniper Networks, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _DEV_CFI_VAR_H_
+#define	_DEV_CFI_VAR_H_
+
+struct cfi_region {
+	u_int		r_blocks;
+	u_int		r_blksz;
+};
+
+struct cfi_softc {
+	device_t	sc_dev;
+
+	struct resource	*sc_res;
+	bus_space_handle_t sc_handle;
+	bus_space_tag_t	sc_tag;
+	int		sc_rid;
+
+	u_int		sc_size;	/* Flash size. */
+	u_int		sc_width;	/* Interface width. */
+	u_int		sc_regions;	/* Erase regions. */
+	struct cfi_region *sc_region;	/* Array of region info. */
+
+	u_int		sc_cmdset;
+	u_int		sc_erase_timeout;
+	u_int		sc_write_timeout;
+
+	struct cdev	*sc_nod;
+	struct proc	*sc_opened;	/* Process that has us opened. */
+
+	u_char		*sc_wrbuf;
+	u_int		sc_wrbufsz;
+	u_int		sc_wrofs;
+	u_int		sc_writing;
+};
+
+extern char cfi_driver_name[];
+extern devclass_t cfi_devclass;
+
+int cfi_probe(device_t);
+int cfi_attach(device_t);
+int cfi_detach(device_t);
+
+uint32_t cfi_read(struct cfi_softc *, u_int);
+uint8_t cfi_read_qry(struct cfi_softc *, u_int);
+int cfi_write_block(struct cfi_softc *);
+
+#endif /* _DEV_CFI_VAR_H_ */