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fcb50ee09c
This driver unifies the i.MX23 and i.MX28 NAND Flash drivers into a single driver that supports both SoC's. Signed-off-by: Patrick Turley <patrick.turley@freescale.com>
124 lines
6.1 KiB
C
124 lines
6.1 KiB
C
/*
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* Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __INCLUDE_LINUX_DEVICE_H
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#define __INCLUDE_LINUX_DEVICE_H
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/* The name that links together the GPMI NFC driver data structures. */
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#define GPMI_NFC_DRIVER_NAME ("gpmi-nfc")
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/* Resource names for the GPMI NFC driver. */
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#define GPMI_NFC_GPMI_REGS_ADDR_RES_NAME ("GPMI NFC GPMI Registers")
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#define GPMI_NFC_GPMI_INTERRUPT_RES_NAME ("GPMI NFC GPMI Interrupt")
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#define GPMI_NFC_BCH_REGS_ADDR_RES_NAME ("GPMI NFC BCH Registers")
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#define GPMI_NFC_BCH_INTERRUPT_RES_NAME ("GPMI NFC BCH Interrupt")
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#define GPMI_NFC_DMA_CHANNELS_RES_NAME ("GPMI NFC DMA Channels")
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#define GPMI_NFC_DMA_INTERRUPT_RES_NAME ("GPMI NFC DMA Interrupt")
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/**
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* struct gpmi_nfc_platform_data - GPMI NFC driver platform data.
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*
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* This structure communicates platform-specific information to the GPMI NFC
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* driver that can't be expressed as resources.
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*
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* @nfc_version: The version of the NFC hardware. This single number
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* represents a collection of NFC behaviors and
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* attributes the driver must comprehend. See the
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* driver code for details about what each version
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* means.
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* @boot_rom_version: The version of the Boot ROM. This single number
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* represents a collection of Boot ROM behaviors and
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* attributes the driver must comprehend. See the
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* driver code for details about what each version
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* means.
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* @clock_name: The name of the clock that drives the NFC.
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* @platform_init: A pointer to a function the driver will call to
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* initialize the platform (e.g., set up the pin mux).
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* The max_chip_count parameter is the maximum number
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* of chips the driver is to support. If the platform
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* can't be configured to support this number, the
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* function should print a message and return a
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* non-zero value . The driver will only view this as
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* an indication of failure and will choose its own
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* error code to return.
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* @platform_exit: A pointer to a function the driver will call to
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* exit the platform (e.g., free pins). The
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* max_chip_count parameter is same value passed to
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* the platform init function.
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* @min_prop_delay_in_ns: Minimum propagation delay of GPMI signals to and
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* from the NAND Flash device, in nanoseconds.
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* @max_prop_delay_in_ns: Maximum propagation delay of GPMI signals to and
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* from the NAND Flash device, in nanoseconds.
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* @max_chip_count: The maximum number of chips for which the driver
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* should configure the hardware. This value most
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* likely reflects the number of pins that are
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* connected to a NAND Flash device. If this is
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* greater than the SoC hardware can support, the
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* driver will print a message and fail to initialize.
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* @boot_area_size_in_bytes: The amount of space reserved for each boot area.
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* Note that some Boot ROMs call for multiple boot
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* areas. If this value is zero, the driver will not
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* construct special partitions for boot areas.
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* @partition_source_types: An array of strings that name sources of
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* partitioning information (e.g., the boot loader,
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* kernel command line, etc.). The function
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* parse_mtd_partitions() recognizes these names and
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* applies the appropriate "plugins" to discover
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* partitioning information. If any is found, it will
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* be applied to the "general use" MTD (it will NOT
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* override the boot area protection mechanism).
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* @partitions: An optional pointer to an array of partition
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* descriptions. If the driver finds no other
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* partitioning information, it will apply these
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* partitions to the "general use" MTD (they do NOT
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* override the boot area protection mechanism).
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* @partition_count: The number of elements in the partitions array.
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*/
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struct gpmi_nfc_platform_data {
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/* Version information. */
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unsigned int nfc_version;
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unsigned int boot_rom_version;
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/* SoC hardware information. */
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char *clock_name;
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int (*platform_init)(unsigned int max_chip_count);
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void (*platform_exit)(unsigned int max_chip_count);
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/* NAND Flash information. */
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unsigned int min_prop_delay_in_ns;
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unsigned int max_prop_delay_in_ns;
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unsigned int max_chip_count;
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/* Medium information. */
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uint32_t boot_area_size_in_bytes;
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const char **partition_source_types;
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struct mtd_partition *partitions;
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unsigned partition_count;
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};
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#endif
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