// SPDX-License-Identifier: GPL-2.0-or-later
|
/*
|
* mtd vendor storage
|
*/
|
|
#include <linux/debugfs.h>
|
#include <linux/delay.h>
|
#include <linux/fs.h>
|
#include <linux/kernel.h>
|
#include <linux/list.h>
|
#include <linux/miscdevice.h>
|
#include <linux/module.h>
|
#include <linux/mtd/mtd.h>
|
#include <linux/platform_device.h>
|
#include <linux/slab.h>
|
#include <linux/soc/rockchip/rk_vendor_storage.h>
|
#include <linux/uaccess.h>
|
#include <linux/vmalloc.h>
|
#include <misc/rkflash_vendor_storage.h>
|
|
#define MTD_VENDOR_PART_START 0
|
#define MTD_VENDOR_PART_SIZE FLASH_VENDOR_PART_SIZE
|
#define MTD_VENDOR_NOR_BLOCK_SIZE 128
|
#define MTD_VENDOR_PART_NUM 1
|
#define MTD_VENDOR_TAG VENDOR_HEAD_TAG
|
|
struct mtd_nand_info {
|
u32 blk_offset;
|
u32 page_offset;
|
u32 version;
|
u32 ops_size;
|
};
|
|
#ifdef CONFIG_ROCKCHIP_VENDOR_STORAGE_UPDATE_LOADER
|
#define READ_SECTOR_IO _IOW('r', 0x04, unsigned int)
|
#define WRITE_SECTOR_IO _IOW('r', 0x05, unsigned int)
|
#define END_WRITE_SECTOR_IO _IOW('r', 0x52, unsigned int)
|
#define GET_FLASH_INFO_IO _IOW('r', 0x1A, unsigned int)
|
#define GET_BAD_BLOCK_IO _IOW('r', 0x03, unsigned int)
|
#define GET_LOCK_FLAG_IO _IOW('r', 0x53, unsigned int)
|
#endif
|
|
static u8 *g_idb_buffer;
|
static struct flash_vendor_info *g_vendor;
|
static DEFINE_MUTEX(vendor_ops_mutex);
|
static struct mtd_info *mtd;
|
static u32 mtd_erase_size;
|
static const char *vendor_mtd_name = "vnvm";
|
static struct mtd_nand_info nand_info;
|
static struct platform_device *g_pdev;
|
|
static int mtd_vendor_nand_write(void)
|
{
|
size_t bytes_write;
|
int err, count = 0;
|
struct erase_info ei;
|
|
re_write:
|
if (nand_info.page_offset >= mtd_erase_size) {
|
nand_info.blk_offset += mtd_erase_size;
|
if (nand_info.blk_offset >= mtd->size)
|
nand_info.blk_offset = 0;
|
if (mtd_block_isbad(mtd, nand_info.blk_offset))
|
goto re_write;
|
|
memset(&ei, 0, sizeof(struct erase_info));
|
ei.addr = nand_info.blk_offset;
|
ei.len = mtd_erase_size;
|
if (mtd_erase(mtd, &ei))
|
goto re_write;
|
|
nand_info.page_offset = 0;
|
}
|
|
err = mtd_write(mtd, nand_info.blk_offset + nand_info.page_offset,
|
nand_info.ops_size, &bytes_write, (u8 *)g_vendor);
|
nand_info.page_offset += nand_info.ops_size;
|
if (err)
|
goto re_write;
|
|
count++;
|
/* write 2 copies for reliability */
|
if (count < 2)
|
goto re_write;
|
|
return 0;
|
}
|
|
static int mtd_vendor_storage_init(void)
|
{
|
int err, offset;
|
size_t bytes_read;
|
struct erase_info ei;
|
|
mtd = get_mtd_device_nm(vendor_mtd_name);
|
if (IS_ERR(mtd))
|
return -EIO;
|
|
nand_info.page_offset = 0;
|
nand_info.blk_offset = 0;
|
nand_info.version = 0;
|
nand_info.ops_size = (sizeof(*g_vendor) + mtd->writesize - 1) / mtd->writesize;
|
nand_info.ops_size *= mtd->writesize;
|
|
/*
|
* The NOR FLASH erase size maybe config as 4KB, need to re-define
|
* and maintain consistency with uboot.
|
*/
|
mtd_erase_size = mtd->erasesize;
|
if (mtd_erase_size <= MTD_VENDOR_NOR_BLOCK_SIZE * 512)
|
mtd_erase_size = MTD_VENDOR_NOR_BLOCK_SIZE * 512;
|
|
for (offset = 0; offset < mtd->size; offset += mtd_erase_size) {
|
if (!mtd_block_isbad(mtd, offset)) {
|
err = mtd_read(mtd, offset, sizeof(*g_vendor),
|
&bytes_read, (u8 *)g_vendor);
|
if (err && err != -EUCLEAN)
|
continue;
|
if (bytes_read == sizeof(*g_vendor) &&
|
g_vendor->tag == MTD_VENDOR_TAG &&
|
g_vendor->version == g_vendor->version2) {
|
if (g_vendor->version > nand_info.version) {
|
nand_info.version = g_vendor->version;
|
nand_info.blk_offset = offset;
|
}
|
}
|
} else if (nand_info.blk_offset == offset)
|
nand_info.blk_offset += mtd_erase_size;
|
}
|
|
if (nand_info.version) {
|
for (offset = mtd_erase_size - nand_info.ops_size;
|
offset >= 0;
|
offset -= nand_info.ops_size) {
|
err = mtd_read(mtd, nand_info.blk_offset + offset,
|
sizeof(*g_vendor),
|
&bytes_read,
|
(u8 *)g_vendor);
|
|
/* the page is not programmed */
|
if (!err && bytes_read == sizeof(*g_vendor) &&
|
g_vendor->tag == 0xFFFFFFFF &&
|
g_vendor->version == 0xFFFFFFFF &&
|
g_vendor->version2 == 0xFFFFFFFF)
|
continue;
|
|
/* point to the next free page */
|
if (nand_info.page_offset < offset)
|
nand_info.page_offset = offset + nand_info.ops_size;
|
|
/* ecc error or io error */
|
if (err && err != -EUCLEAN)
|
continue;
|
|
if (bytes_read == sizeof(*g_vendor) &&
|
g_vendor->tag == MTD_VENDOR_TAG &&
|
g_vendor->version == g_vendor->version2) {
|
if (nand_info.version > g_vendor->version)
|
g_vendor->version = nand_info.version;
|
else
|
nand_info.version = g_vendor->version;
|
break;
|
}
|
}
|
} else {
|
memset((u8 *)g_vendor, 0, sizeof(*g_vendor));
|
g_vendor->version = 1;
|
g_vendor->tag = MTD_VENDOR_TAG;
|
g_vendor->free_size = sizeof(g_vendor->data);
|
g_vendor->version2 = g_vendor->version;
|
for (offset = 0; offset < mtd->size; offset += mtd_erase_size) {
|
if (!mtd_block_isbad(mtd, offset)) {
|
memset(&ei, 0, sizeof(struct erase_info));
|
ei.addr = nand_info.blk_offset + offset;
|
ei.len = mtd_erase_size;
|
mtd_erase(mtd, &ei);
|
}
|
}
|
mtd_vendor_nand_write();
|
}
|
|
return 0;
|
}
|
|
static int mtd_vendor_read(u32 id, void *pbuf, u32 size)
|
{
|
u32 i;
|
|
if (!g_vendor)
|
return -ENOMEM;
|
|
for (i = 0; i < g_vendor->item_num; i++) {
|
if (g_vendor->item[i].id == id) {
|
if (size > g_vendor->item[i].size)
|
size = g_vendor->item[i].size;
|
memcpy(pbuf,
|
&g_vendor->data[g_vendor->item[i].offset],
|
size);
|
return size;
|
}
|
}
|
return (-1);
|
}
|
|
static int mtd_vendor_write(u32 id, void *pbuf, u32 size)
|
{
|
u32 i, j, align_size, alloc_size, item_num;
|
u32 offset, next_size;
|
u8 *p_data;
|
struct vendor_item *item;
|
struct vendor_item *next_item;
|
|
if (!g_vendor)
|
return -ENOMEM;
|
|
p_data = g_vendor->data;
|
item_num = g_vendor->item_num;
|
align_size = ALIGN(size, 0x40); /* align to 64 bytes*/
|
for (i = 0; i < item_num; i++) {
|
item = &g_vendor->item[i];
|
if (item->id == id) {
|
alloc_size = ALIGN(item->size, 0x40);
|
if (size > alloc_size) {
|
if (g_vendor->free_size < align_size)
|
return -1;
|
offset = item->offset;
|
for (j = i; j < item_num - 1; j++) {
|
item = &g_vendor->item[j];
|
next_item = &g_vendor->item[j + 1];
|
item->id = next_item->id;
|
item->size = next_item->size;
|
item->offset = offset;
|
next_size = ALIGN(next_item->size,
|
0x40);
|
memcpy(&p_data[offset],
|
&p_data[next_item->offset],
|
next_size);
|
offset += next_size;
|
}
|
item = &g_vendor->item[j];
|
item->id = id;
|
item->offset = offset;
|
item->size = size;
|
memcpy(&p_data[item->offset], pbuf, size);
|
g_vendor->free_offset = offset + align_size;
|
g_vendor->free_size = sizeof(g_vendor->data) - g_vendor->free_offset;
|
} else {
|
memcpy(&p_data[item->offset],
|
pbuf,
|
size);
|
g_vendor->item[i].size = size;
|
}
|
g_vendor->version++;
|
g_vendor->version2 = g_vendor->version;
|
mtd_vendor_nand_write();
|
return 0;
|
}
|
}
|
|
if (g_vendor->free_size >= align_size) {
|
item = &g_vendor->item[g_vendor->item_num];
|
item->id = id;
|
item->offset = g_vendor->free_offset;
|
item->size = size;
|
g_vendor->free_offset += align_size;
|
g_vendor->free_size -= align_size;
|
memcpy(&g_vendor->data[item->offset], pbuf, size);
|
g_vendor->item_num++;
|
g_vendor->version++;
|
g_vendor->version2 = g_vendor->version;
|
mtd_vendor_nand_write();
|
return 0;
|
}
|
return(-1);
|
}
|
|
static int vendor_storage_open(struct inode *inode, struct file *file)
|
{
|
return 0;
|
}
|
|
static int vendor_storage_release(struct inode *inode, struct file *file)
|
{
|
return 0;
|
}
|
|
static long vendor_storage_ioctl(struct file *file, unsigned int cmd,
|
unsigned long arg)
|
{
|
long ret = -1;
|
int size;
|
struct RK_VENDOR_REQ *v_req;
|
u32 *page_buf;
|
|
page_buf = kmalloc(4096, GFP_KERNEL);
|
if (!page_buf)
|
return -ENOMEM;
|
|
mutex_lock(&vendor_ops_mutex);
|
|
v_req = (struct RK_VENDOR_REQ *)page_buf;
|
|
switch (cmd) {
|
case VENDOR_READ_IO:
|
{
|
if (copy_from_user(page_buf, (void __user *)arg, 8)) {
|
ret = -EFAULT;
|
break;
|
}
|
if (v_req->tag == VENDOR_REQ_TAG) {
|
size = mtd_vendor_read(v_req->id, v_req->data,
|
v_req->len);
|
if (size != -1) {
|
v_req->len = size;
|
ret = 0;
|
if (copy_to_user((void __user *)arg,
|
page_buf,
|
v_req->len + 8))
|
ret = -EFAULT;
|
}
|
}
|
} break;
|
|
case VENDOR_WRITE_IO:
|
{
|
if (copy_from_user(page_buf, (void __user *)arg, 8)) {
|
ret = -EFAULT;
|
break;
|
}
|
if (v_req->tag == VENDOR_REQ_TAG && (v_req->len < 4096 - 8)) {
|
if (copy_from_user(page_buf, (void __user *)arg,
|
v_req->len + 8)) {
|
ret = -EFAULT;
|
break;
|
}
|
ret = mtd_vendor_write(v_req->id,
|
v_req->data,
|
v_req->len);
|
}
|
} break;
|
|
default:
|
ret = -EINVAL;
|
goto exit;
|
}
|
exit:
|
mutex_unlock(&vendor_ops_mutex);
|
kfree(page_buf);
|
return ret;
|
}
|
|
static const struct file_operations vendor_storage_fops = {
|
.open = vendor_storage_open,
|
.compat_ioctl = vendor_storage_ioctl,
|
.unlocked_ioctl = vendor_storage_ioctl,
|
.release = vendor_storage_release,
|
};
|
|
static struct miscdevice vendor_storage_dev = {
|
.minor = MISC_DYNAMIC_MINOR,
|
.name = "vendor_storage",
|
.fops = &vendor_storage_fops,
|
};
|
|
static int vendor_storage_probe(struct platform_device *pdev)
|
{
|
struct device *dev = &pdev->dev;
|
int ret;
|
|
mtd = get_mtd_device_nm(vendor_mtd_name);
|
if (IS_ERR(mtd))
|
return -EPROBE_DEFER;
|
|
g_vendor = devm_kmalloc(dev, sizeof(*g_vendor), GFP_KERNEL | GFP_DMA);
|
if (!g_vendor)
|
return -ENOMEM;
|
|
ret = mtd_vendor_storage_init();
|
if (ret) {
|
g_vendor = NULL;
|
return ret;
|
}
|
|
ret = misc_register(&vendor_storage_dev);
|
rk_vendor_register(mtd_vendor_read, mtd_vendor_write);
|
|
pr_err("mtd vendor storage:20200313 ret = %d\n", ret);
|
|
return ret;
|
}
|
|
static int vendor_storage_remove(struct platform_device *pdev)
|
{
|
if (g_vendor) {
|
misc_deregister(&vendor_storage_dev);
|
g_vendor = NULL;
|
}
|
|
return 0;
|
}
|
|
static const struct platform_device_id vendor_storage_ids[] = {
|
{ "mtd_vendor_storage", },
|
{ }
|
};
|
|
static struct platform_driver vendor_storage_driver = {
|
.probe = vendor_storage_probe,
|
.remove = vendor_storage_remove,
|
.driver = {
|
.name = "mtd_vendor_storage",
|
},
|
.id_table = vendor_storage_ids,
|
};
|
|
static int __init vendor_storage_init(void)
|
{
|
struct platform_device *pdev;
|
int ret;
|
|
g_idb_buffer = NULL;
|
ret = platform_driver_register(&vendor_storage_driver);
|
if (ret)
|
return ret;
|
|
pdev = platform_device_register_simple("mtd_vendor_storage",
|
-1, NULL, 0);
|
if (IS_ERR(pdev)) {
|
platform_driver_unregister(&vendor_storage_driver);
|
return PTR_ERR(pdev);
|
}
|
g_pdev = pdev;
|
|
return ret;
|
}
|
|
static __exit void vendor_storage_deinit(void)
|
{
|
platform_device_unregister(g_pdev);
|
platform_driver_unregister(&vendor_storage_driver);
|
}
|
|
device_initcall_sync(vendor_storage_init);
|
module_exit(vendor_storage_deinit);
|
MODULE_LICENSE("GPL");
|
