linux/drivers/mtd/lpddr/lpddr_cmds.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * LPDDR flash memory device operations. This module provides read, write,
 * erase, lock/unlock support for LPDDR flash memories
 * (C) 2008 Korolev Alexey <[email protected]>
 * (C) 2008 Vasiliy Leonenko <[email protected]>
 * Many thanks to Roman Borisov for initial enabling
 *
 * TODO:
 * Implement VPP management
 * Implement XIP support
 * Implement OTP support
 */
#include <linux/mtd/pfow.h>
#include <linux/mtd/qinfo.h>
#include <linux/slab.h>
#include <linux/module.h>

static int lpddr_read(struct mtd_info *mtd, loff_t adr, size_t len,
					size_t *retlen, u_char *buf);
static int lpddr_write_buffers(struct mtd_info *mtd, loff_t to,
				size_t len, size_t *retlen, const u_char *buf);
static int lpddr_writev(struct mtd_info *mtd, const struct kvec *vecs,
				unsigned long count, loff_t to, size_t *retlen);
static int lpddr_erase(struct mtd_info *mtd, struct erase_info *instr);
static int lpddr_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
static int lpddr_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
static int lpddr_point(struct mtd_info *mtd, loff_t adr, size_t len,
			size_t *retlen, void **mtdbuf, resource_size_t *phys);
static int lpddr_unpoint(struct mtd_info *mtd, loff_t adr, size_t len);
static int get_chip(struct map_info *map, struct flchip *chip, int mode);
static int chip_ready(struct map_info *map, struct flchip *chip, int mode);
static void put_chip(struct map_info *map, struct flchip *chip);

struct mtd_info *lpddr_cmdset(struct map_info *map)
{ … }
EXPORT_SYMBOL(…);

static void print_drs_error(unsigned int dsr)
{ … }

static int wait_for_ready(struct map_info *map, struct flchip *chip,
		unsigned int chip_op_time)
{ … }

static int get_chip(struct map_info *map, struct flchip *chip, int mode)
{ … }

static int chip_ready(struct map_info *map, struct flchip *chip, int mode)
{ … }

static void put_chip(struct map_info *map, struct flchip *chip)
{ … }

static int do_write_buffer(struct map_info *map, struct flchip *chip,
			unsigned long adr, const struct kvec **pvec,
			unsigned long *pvec_seek, int len)
{ … }

static int do_erase_oneblock(struct mtd_info *mtd, loff_t adr)
{ … }

static int lpddr_read(struct mtd_info *mtd, loff_t adr, size_t len,
			size_t *retlen, u_char *buf)
{ … }

static int lpddr_point(struct mtd_info *mtd, loff_t adr, size_t len,
			size_t *retlen, void **mtdbuf, resource_size_t *phys)
{ … }

static int lpddr_unpoint (struct mtd_info *mtd, loff_t adr, size_t len)
{ … }

static int lpddr_write_buffers(struct mtd_info *mtd, loff_t to, size_t len,
				size_t *retlen, const u_char *buf)
{ … }


static int lpddr_writev(struct mtd_info *mtd, const struct kvec *vecs,
				unsigned long count, loff_t to, size_t *retlen)
{ … }

static int lpddr_erase(struct mtd_info *mtd, struct erase_info *instr)
{ … }

#define DO_XXLOCK_LOCK …
#define DO_XXLOCK_UNLOCK …
static int do_xxlock(struct mtd_info *mtd, loff_t adr, uint32_t len, int thunk)
{ … }

static int lpddr_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{ … }

static int lpddr_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{ … }

MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;