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nand_micron.c revision 1.1 
      1 /*-
      2  * Copyright (c) 2011 Department of Software Engineering,
      3  *		      University of Szeged, Hungary
      4  * Copyright (c) 2011 Adam Hoka <ahoka (at) NetBSD.org>
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by the Department of Software Engineering, University of Szeged, Hungary
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Device specific functions for legacy Micron NAND chips
     34  *
     35  * Currently supported:
     36  * MT29F2G08AACWP, MT29F4G08BACWP, MT29F8G08FACWP
     37  */
     38 
     39 #include "nand.h"
     40 #include "onfi.h"
     41 
     42 int
     43 nand_read_parameters_micron(device_t self, struct nand_chip *chip)
     44 {
     45 	uint8_t byte;
     46 
     47 	KASSERT(chip->nc_manf_id == NAND_MFR_MICRON);
     48 
     49 	nand_select(self, true);
     50 	nand_command(self, ONFI_READ_ID);
     51 	nand_address(self, 0x00);
     52 
     53 	switch (chip->nc_manf_id) {
     54 		/* three dummy reads */
     55 		nand_read_byte(self, &byte); /* vendor */
     56 		nand_read_byte(self, &byte); /* device */
     57 		nand_read_byte(self, &byte); /* unused */
     58 
     59 		/* this is the interesting one */
     60 		nand_read_byte(self, &byte);
     61 		/* TODO actually get info */
     62 		nand_select(self, false);
     63 		return 1;
     64 
     65 		break;
     66 	default:
     67 		nand_select(self, false);
     68 		return 1;
     69 	}
     70 
     71 	chip->nc_num_luns = 1;
     72 	chip->nc_lun_blocks = chip->nc_size / chip->nc_block_size;
     73 
     74 	nand_select(self, false);
     75 
     76 	return 0;
     77 }
     78