linux/drivers/mtd/maps/amd76xrom.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * amd76xrom.c
 *
 * Normal mappings of chips in physical memory
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/cfi.h>
#include <linux/mtd/flashchip.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/list.h>


#define xstr(s) …
#define str(s) …
#define MOD_NAME …

#define ADDRESS_NAME_LEN …

#define ROM_PROBE_STEP_SIZE …

struct amd76xrom_window { … };

struct amd76xrom_map_info { … };

/* The 2 bits controlling the window size are often set to allow reading
 * the BIOS, but too small to allow writing, since the lock registers are
 * 4MiB lower in the address space than the data.
 *
 * This is intended to prevent flashing the bios, perhaps accidentally.
 *
 * This parameter allows the normal driver to over-ride the BIOS settings.
 *
 * The bits are 6 and 7.  If both bits are set, it is a 5MiB window.
 * If only the 7 Bit is set, it is a 4MiB window.  Otherwise, a
 * 64KiB window.
 *
 */
static uint win_size_bits;
module_param(win_size_bits, uint, 0);
MODULE_PARM_DESC(…) …;

static struct amd76xrom_window amd76xrom_window = …;

static void amd76xrom_cleanup(struct amd76xrom_window *window)
{ … }


static int amd76xrom_init_one(struct pci_dev *pdev,
			      const struct pci_device_id *ent)
{ … }


static void amd76xrom_remove_one(struct pci_dev *pdev)
{ … }

static const struct pci_device_id amd76xrom_pci_tbl[] = …;

MODULE_DEVICE_TABLE(pci, amd76xrom_pci_tbl);

#if 0
static struct pci_driver amd76xrom_driver = {
	.name =		MOD_NAME,
	.id_table =	amd76xrom_pci_tbl,
	.probe =	amd76xrom_init_one,
	.remove =	amd76xrom_remove_one,
};
#endif

static int __init init_amd76xrom(void)
{ … }

static void __exit cleanup_amd76xrom(void)
{ … }

module_init(…) …;
module_exit(cleanup_amd76xrom);

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