CVS commit: src/sys/dev/nand

[Adam Hoka]

Module Name:    src
Committed By:   ahoka
Date:           Tue Oct 30 22:03:00 UTC 2012

Added Files:
        src/sys/dev/nand: nand_samsung.c

Log Message:
Add support for samsung devices, currently a draft to aid Kirkwood NAND
driver development.


To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/sys/dev/nand/nand_samsung.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.


Added files:

Index: src/sys/dev/nand/nand_samsung.c
diff -u /dev/null src/sys/dev/nand/nand_samsung.c:1.1
--- /dev/null	Tue Oct 30 22:03:00 2012
+++ src/sys/dev/nand/nand_samsung.c	Tue Oct 30 22:03:00 2012
@@ -0,0 +1,135 @@
+/*	$NetBSD: nand_samsung.c,v 1.1 2012/10/30 22:03:00 ahoka Exp $	*/
+
+/*-
+ * Copyright (c) 2012 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Adam Hoka.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+/*
+ * Device specific functions for legacy Samsung NAND chips
+ *
+ * Currently supported:
+ * K9XXG08UXA
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: nand_samsung.c,v 1.1 2012/10/30 22:03:00 ahoka Exp $");
+
+#include "nand.h"
+#include "onfi.h"
+
+int
+nand_read_parameters_samsung(device_t self, struct nand_chip * const chip)
+{
+	uint8_t mfgrid;
+	uint8_t devid;
+	uint8_t dontcare1;
+	uint8_t dontcare2;
+	uint8_t params2;
+
+	/* Only for Samsung devices, obviously */
+	if (chip->nc_manf_id != NAND_MFR_SAMSUNG) {
+		return 1;
+	}
+
+	nand_select(self, true);
+	nand_command(self, ONFI_READ_ID);
+	nand_address(self, 0x00);
+	nand_read_1(self, &mfgrid);
+	nand_read_1(self, &devid);
+	nand_read_1(self, &params1);
+	nand_read_1(self, &params2);
+	nand_read_1(self, &params3);
+	nand_select(self, false);
+
+	enum {
+		NAND_SAMSUNG_PAGEMASK = 0x3,
+		NAND_SAMSUNG_BLOCKMASK = 0x3 << 4,
+		NAND_SAMSUNG_SPAREMASK = 0x1 << 2,
+		NAND_SAMSUNG_BITSMASK = 0x1 << 6
+	};
+
+	/* K9XXG08UXA */
+	if (devid == 0xdc) {
+		switch (params2 & NAND_SAMSUNG_PAGEMASK) {
+		case 0x0:
+			chip->nc_page_size = 1024;
+			break;
+		case 0x1:
+			chip->nc_page_size = 2048;
+			break;
+		case 0x2:
+			chip->nc_page_size = 4096;
+			break;
+		case 0x3:
+			chip->nc_page_size = 8192;
+			break;
+		}
+
+		switch ((params2 & NAND_SAMSUNG_PAGEMASK) >> 4) {
+		case 0x0:
+			chip->nc_block_size = 64 * 1024;
+			break;
+		case 0x0:
+			chip->nc_block_size = 128 * 1024;
+			break;
+		case 0x0:
+			chip->nc_block_size = 256 * 1024;
+			break;
+		case 0x0:
+			chip->nc_block_size = 512 * 1024;
+			break;
+		}
+
+		/* 8/16 bytes per 512 bytes! XXX do i get this right? */
+		switch ((params2 & NAND_SAMSUNG_SPAREMASK) >> 2) {
+		case 0x0:
+			chip->nc_spare_size = 8 * chip->nc_page_size / 512;
+			break;
+		case 0x1:
+			chip->nc_spare_size = 16 * chip->nc_page_size / 512;
+			break;
+		}
+
+		switch ((params2 & NAND_SAMSUNG_BITSMASK) >> 6) {
+		case 0x0:
+			/* its an 8bit chip */
+			break;
+		case 0x1:
+			chip->nc_flags |= NC_BUSWIDTH_16;
+			break;
+		}
+		
+		// TODO make this nice like the above
+		chip->nc_size = (((params3 >> 4) & 0x7) + 1) * 64 * 1024 * 1024;
+	} else {
+		return 1;
+	}
+       
+	return 0;
+}
+