mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 08:07:10 +07:00
eea628199d
This patch adds support to configure the FSMC NAND driver (used amongst others on SPEAr platforms) via device-tree instead of platform_data. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
177 lines
4.5 KiB
C
177 lines
4.5 KiB
C
/*
|
|
* incude/mtd/fsmc.h
|
|
*
|
|
* ST Microelectronics
|
|
* Flexible Static Memory Controller (FSMC)
|
|
* platform data interface and header file
|
|
*
|
|
* Copyright © 2010 ST Microelectronics
|
|
* Vipin Kumar <vipin.kumar@st.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#ifndef __MTD_FSMC_H
|
|
#define __MTD_FSMC_H
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/mtd/physmap.h>
|
|
#include <linux/types.h>
|
|
#include <linux/mtd/partitions.h>
|
|
#include <asm/param.h>
|
|
|
|
#define FSMC_NAND_BW8 1
|
|
#define FSMC_NAND_BW16 2
|
|
|
|
#define FSMC_MAX_NOR_BANKS 4
|
|
#define FSMC_MAX_NAND_BANKS 4
|
|
|
|
#define FSMC_FLASH_WIDTH8 1
|
|
#define FSMC_FLASH_WIDTH16 2
|
|
|
|
/* fsmc controller registers for NOR flash */
|
|
#define CTRL 0x0
|
|
/* ctrl register definitions */
|
|
#define BANK_ENABLE (1 << 0)
|
|
#define MUXED (1 << 1)
|
|
#define NOR_DEV (2 << 2)
|
|
#define WIDTH_8 (0 << 4)
|
|
#define WIDTH_16 (1 << 4)
|
|
#define RSTPWRDWN (1 << 6)
|
|
#define WPROT (1 << 7)
|
|
#define WRT_ENABLE (1 << 12)
|
|
#define WAIT_ENB (1 << 13)
|
|
|
|
#define CTRL_TIM 0x4
|
|
/* ctrl_tim register definitions */
|
|
|
|
#define FSMC_NOR_BANK_SZ 0x8
|
|
#define FSMC_NOR_REG_SIZE 0x40
|
|
|
|
#define FSMC_NOR_REG(base, bank, reg) (base + \
|
|
FSMC_NOR_BANK_SZ * (bank) + \
|
|
reg)
|
|
|
|
/* fsmc controller registers for NAND flash */
|
|
#define PC 0x00
|
|
/* pc register definitions */
|
|
#define FSMC_RESET (1 << 0)
|
|
#define FSMC_WAITON (1 << 1)
|
|
#define FSMC_ENABLE (1 << 2)
|
|
#define FSMC_DEVTYPE_NAND (1 << 3)
|
|
#define FSMC_DEVWID_8 (0 << 4)
|
|
#define FSMC_DEVWID_16 (1 << 4)
|
|
#define FSMC_ECCEN (1 << 6)
|
|
#define FSMC_ECCPLEN_512 (0 << 7)
|
|
#define FSMC_ECCPLEN_256 (1 << 7)
|
|
#define FSMC_TCLR_1 (1)
|
|
#define FSMC_TCLR_SHIFT (9)
|
|
#define FSMC_TCLR_MASK (0xF)
|
|
#define FSMC_TAR_1 (1)
|
|
#define FSMC_TAR_SHIFT (13)
|
|
#define FSMC_TAR_MASK (0xF)
|
|
#define STS 0x04
|
|
/* sts register definitions */
|
|
#define FSMC_CODE_RDY (1 << 15)
|
|
#define COMM 0x08
|
|
/* comm register definitions */
|
|
#define FSMC_TSET_0 0
|
|
#define FSMC_TSET_SHIFT 0
|
|
#define FSMC_TSET_MASK 0xFF
|
|
#define FSMC_TWAIT_6 6
|
|
#define FSMC_TWAIT_SHIFT 8
|
|
#define FSMC_TWAIT_MASK 0xFF
|
|
#define FSMC_THOLD_4 4
|
|
#define FSMC_THOLD_SHIFT 16
|
|
#define FSMC_THOLD_MASK 0xFF
|
|
#define FSMC_THIZ_1 1
|
|
#define FSMC_THIZ_SHIFT 24
|
|
#define FSMC_THIZ_MASK 0xFF
|
|
#define ATTRIB 0x0C
|
|
#define IOATA 0x10
|
|
#define ECC1 0x14
|
|
#define ECC2 0x18
|
|
#define ECC3 0x1C
|
|
#define FSMC_NAND_BANK_SZ 0x20
|
|
|
|
#define FSMC_NAND_REG(base, bank, reg) (base + FSMC_NOR_REG_SIZE + \
|
|
(FSMC_NAND_BANK_SZ * (bank)) + \
|
|
reg)
|
|
|
|
#define FSMC_BUSY_WAIT_TIMEOUT (1 * HZ)
|
|
|
|
/*
|
|
* There are 13 bytes of ecc for every 512 byte block in FSMC version 8
|
|
* and it has to be read consecutively and immediately after the 512
|
|
* byte data block for hardware to generate the error bit offsets
|
|
* Managing the ecc bytes in the following way is easier. This way is
|
|
* similar to oobfree structure maintained already in u-boot nand driver
|
|
*/
|
|
#define MAX_ECCPLACE_ENTRIES 32
|
|
|
|
struct fsmc_nand_eccplace {
|
|
uint8_t offset;
|
|
uint8_t length;
|
|
};
|
|
|
|
struct fsmc_eccplace {
|
|
struct fsmc_nand_eccplace eccplace[MAX_ECCPLACE_ENTRIES];
|
|
};
|
|
|
|
struct fsmc_nand_timings {
|
|
uint8_t tclr;
|
|
uint8_t tar;
|
|
uint8_t thiz;
|
|
uint8_t thold;
|
|
uint8_t twait;
|
|
uint8_t tset;
|
|
};
|
|
|
|
enum access_mode {
|
|
USE_DMA_ACCESS = 1,
|
|
USE_WORD_ACCESS,
|
|
};
|
|
|
|
/**
|
|
* fsmc_nand_platform_data - platform specific NAND controller config
|
|
* @partitions: partition table for the platform, use a default fallback
|
|
* if this is NULL
|
|
* @nr_partitions: the number of partitions in the previous entry
|
|
* @options: different options for the driver
|
|
* @width: bus width
|
|
* @bank: default bank
|
|
* @select_bank: callback to select a certain bank, this is
|
|
* platform-specific. If the controller only supports one bank
|
|
* this may be set to NULL
|
|
*/
|
|
struct fsmc_nand_platform_data {
|
|
struct fsmc_nand_timings *nand_timings;
|
|
struct mtd_partition *partitions;
|
|
unsigned int nr_partitions;
|
|
unsigned int options;
|
|
unsigned int width;
|
|
unsigned int bank;
|
|
|
|
/* CLE, ALE offsets */
|
|
unsigned int cle_off;
|
|
unsigned int ale_off;
|
|
enum access_mode mode;
|
|
|
|
void (*select_bank)(uint32_t bank, uint32_t busw);
|
|
|
|
/* priv structures for dma accesses */
|
|
void *read_dma_priv;
|
|
void *write_dma_priv;
|
|
};
|
|
|
|
extern int __init fsmc_nor_init(struct platform_device *pdev,
|
|
unsigned long base, uint32_t bank, uint32_t width);
|
|
extern void __init fsmc_init_board_info(struct platform_device *pdev,
|
|
struct mtd_partition *partitions, unsigned int nr_partitions,
|
|
unsigned int width);
|
|
|
|
#endif /* __MTD_FSMC_H */
|