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/*
* Copyright 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#ifndef __DRIVERS_NAND_DEVICE_INFO_H
#define __DRIVERS_NAND_DEVICE_INFO_H
/*
* The number of ID bytes to read from the NAND Flash device and hand over to
* the identification system.
*/
#define NAND_DEVICE_ID_BYTE_COUNT (6)
/*
* The number of ID bytes to read from the NAND Flash device and hand over to
* the identification system.
*/
enum nand_device_cell_technology {
NAND_DEVICE_CELL_TECH_SLC = 0,
NAND_DEVICE_CELL_TECH_MLC = 1,
};
/**
* struct nand_device_info - Information about a single NAND Flash device.
*
* This structure contains all the *essential* information about a NAND Flash
* device, derived from the device's data sheet. For each manufacturer, we have
* an array of these structures.
*
* @end_of_table: If true, marks the end of a table of device
* information.
* @manufacturer_code: The manufacturer code (1st ID byte) reported by
* the device.
* @device_code: The device code (2nd ID byte) reported by the
* device.
* @is_ddr_ok: Is this nand an ONFI nand or TOGGLE nand ?
* @cell_technology: The storage cell technology.
* @chip_size_in_bytes: The total size of the storage behind a single
* chip select, in bytes. Notice that this is *not*
* necessarily the total size of the storage in a
* *package*, which may contain several chips.
* @block_size_in_pages: The number of pages in a block.
* @page_total_size_in_bytes: The total size of a page, in bytes, including
* both the data and the OOB.
* @ecc_strength_in_bits: The strength of the ECC called for by the
* manufacturer, in number of correctable bits.
* @ecc_size_in_bytes: The size of the data block over which the
* manufacturer calls for the given ECC algorithm
* and strength.
* @data_setup_in_ns: The data setup time, in nanoseconds. Usually the
* maximum of tDS and tWP. A negative value
* indicates this characteristic isn't known.
* @data_hold_in_ns: The data hold time, in nanoseconds. Usually the
* maximum of tDH, tWH and tREH. A negative value
* indicates this characteristic isn't known.
* @address_setup_in_ns: The address setup time, in nanoseconds. Usually
* the maximum of tCLS, tCS and tALS. A negative
* value indicates this characteristic isn't known.
* @gpmi_sample_delay_in_ns: A GPMI-specific timing parameter. A negative
* value indicates this characteristic isn't known.
* @tREA_in_ns: tREA, in nanoseconds, from the data sheet. A
* negative value indicates this characteristic
* isn't known.
* @tRLOH_in_ns: tRLOH, in nanoseconds, from the data sheet. A
* negative value indicates this characteristic
* isn't known.
* @tRHOH_in_ns: tRHOH, in nanoseconds, from the data sheet. A
* negative value indicates this characteristic
* isn't known.
*/
struct nand_device_info {
/* End of table marker */
bool end_of_table;
/* Manufacturer and Device codes */
uint8_t manufacturer_code;
uint8_t device_code;
/* Does the nand support DDR? (ONFI or TOGGLE) */
bool is_ddr_ok;
/* Technology */
enum nand_device_cell_technology cell_technology;
/* Geometry */
uint64_t chip_size_in_bytes;
uint32_t block_size_in_pages;
uint16_t page_total_size_in_bytes;
/* ECC */
uint8_t ecc_strength_in_bits;
uint16_t ecc_size_in_bytes;
/* Timing */
int8_t data_setup_in_ns;
int8_t data_hold_in_ns;
int8_t address_setup_in_ns;
int8_t gpmi_sample_delay_in_ns;
int8_t tREA_in_ns;
int8_t tRLOH_in_ns;
int8_t tRHOH_in_ns;
/* Description */
const char *description;
};
/**
* nand_device_get_info - Get info about a device based on ID bytes.
*
* @id_bytes: An array of NAND_DEVICE_ID_BYTE_COUNT ID bytes retrieved from the
* NAND Flash device.
*/
struct nand_device_info *nand_device_get_info(const uint8_t id_bytes[]);
/**
* nand_device_print_info - Prints information about a NAND Flash device.
*
* @info A pointer to a NAND Flash device information structure.
*/
void nand_device_print_info(struct nand_device_info *info);
/*
* Check the NAND whether it supports the DDR mode.
* Only the ONFI nand and TOGGLE nand support the DDR now.
*/
static inline bool is_ddr_nand(struct nand_device_info *info)
{
return info->is_ddr_ok;
}
#endif
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