/
emmc_partitions.c
1465 lines (1238 loc) · 34.1 KB
/
emmc_partitions.c
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/*
* drivers/amlogic/mmc/emmc_partitions.c
*
* Copyright (C) 2017 Amlogic, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
*/
#include <linux/types.h>
#include <linux/stddef.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/genhd.h>
#include <linux/blkdev.h>
#include <linux/scatterlist.h>
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/uaccess.h>
#include <linux/vmalloc.h>
#include <linux/mmc/emmc_partitions.h>
#include <linux/amlogic/cpu_version.h>
#include <linux/amlogic/iomap.h>
#include <linux/amlogic/sd.h>
#include "emmc_key.h"
#include <linux/dma-contiguous.h>
#define DTB_NAME "dtb"
#define DDR_NAME "ddr_parameter"
#define SZ_1M 0x00100000
#define MMC_DTB_PART_OFFSET (40*SZ_1M)
#define DDR_PARAMETER_OFFSET (8*SZ_1M)
#define EMMC_BLOCK_SIZE (0x100)
#define MAX_EMMC_BLOCK_SIZE (128*1024)
#define DTB_RESERVE_OFFSET (4 * SZ_1M)
#define DTB_BLK_SIZE (0x200)
#define DTB_BLK_CNT (512)
#define DTB_SIZE (DTB_BLK_CNT * DTB_BLK_SIZE)
#define DTB_COPIES (2)
#define DTB_AREA_BLK_CNT (DTB_BLK_CNT * DTB_COPIES)
/* pertransfer for internal opearations. */
#define MAX_TRANS_BLK (256)
#define MAX_TRANS_SIZE (MAX_TRANS_BLK * DTB_BLK_SIZE)
#define stamp_after(a, b) ((int)(b) - (int)(a) < 0)
#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
struct aml_dtb_rsv {
u8 data[DTB_BLK_SIZE*DTB_BLK_CNT - 4*sizeof(unsigned int)];
unsigned int magic;
unsigned int version;
unsigned int timestamp;
unsigned int checksum;
};
struct aml_dtb_info {
unsigned int stamp[2];
u8 valid[2];
};
struct efi_guid_t {
u8 b[16];
};
struct gpt_header {
__le64 signature;
__le32 revision;
__le32 header_size;
__le32 header_crc32;
__le32 reserved1;
__le64 my_lba;
__le64 alternate_lba;
__le64 first_usable_lba;
__le64 last_usable_lba;
struct efi_guid_t disk_guid;
__le64 partition_entry_lba;
__le32 num_partition_entries;
__le32 sizeof_partition_entry;
__le32 partition_entry_array_crc32;
};
static dev_t amlmmc_dtb_no;
struct cdev amlmmc_dtb;
struct device *dtb_dev;
struct class *amlmmc_dtb_class;
static dev_t amlmmc_ddr_no;
struct cdev amlmmc_ddr;
struct device *ddr_dev;
struct class *amlmmc_ddr_class;
struct mmc_card *card_dtb;
static struct aml_dtb_info dtb_infos = {{0, 0}, {0, 0} };
struct mmc_partitions_fmt *pt_fmt;
/* dtb read&write operation with backup updates */
static unsigned int _calc_dtb_checksum(struct aml_dtb_rsv *dtb)
{
int i = 0;
int size = sizeof(struct aml_dtb_rsv) - sizeof(unsigned int);
unsigned int *buffer;
unsigned int checksum = 0;
size = size >> 2;
buffer = (unsigned int *) dtb;
while (i < size)
checksum += buffer[i++];
return checksum;
}
static int _verify_dtb_checksum(struct aml_dtb_rsv *dtb)
{
unsigned int checksum;
checksum = _calc_dtb_checksum(dtb);
pr_info("calc %x, store %x\n", checksum, dtb->checksum);
return !(checksum == dtb->checksum);
}
static int _amlmmc_write(struct mmc_card *mmc,
int blk, unsigned char *buf, int cnt)
{
int ret = 0;
unsigned char *src = NULL;
src = (unsigned char *)buf;
mmc_claim_host(mmc->host);
do {
ret = mmc_write_internal(mmc, blk, MAX_TRANS_BLK, src);
if (ret) {
pr_err("%s: save dtb error", __func__);
ret = -EFAULT;
break;
}
blk += MAX_TRANS_BLK;
cnt -= MAX_TRANS_BLK;
src = (unsigned char *)buf + MAX_TRANS_SIZE;
} while (cnt != 0);
mmc_release_host(mmc->host);
return ret;
}
static int _amlmmc_read(struct mmc_card *mmc,
int blk, unsigned char *buf, int cnt)
{
int ret = 0;
unsigned char *dst = NULL;
dst = (unsigned char *)buf;
mmc_claim_host(mmc->host);
do {
ret = mmc_read_internal(mmc, blk, MAX_TRANS_BLK, dst);
if (ret) {
pr_err("%s: save dtb error", __func__);
ret = -EFAULT;
break;
}
blk += MAX_TRANS_BLK;
cnt -= MAX_TRANS_BLK;
dst = (unsigned char *)buf + MAX_TRANS_SIZE;
} while (cnt != 0);
mmc_release_host(mmc->host);
return ret;
}
static int _dtb_init(struct mmc_card *mmc)
{
int ret = 0;
struct aml_dtb_rsv *dtb;
struct aml_dtb_info *info = &dtb_infos;
int cpy = 1, valid = 0;
int bit = mmc->csd.read_blkbits;
int blk;
int cnt = CONFIG_DTB_SIZE >> bit;
dtb = kmalloc(CONFIG_DTB_SIZE, GFP_KERNEL);
if (!dtb)
return -ENOMEM;
/* read dtb2 1st, for compatibility without checksum. */
while (cpy >= 0) {
blk = ((get_reserve_partition_off_from_tbl()
+ DTB_RESERVE_OFFSET) >> bit)
+ cpy * DTB_BLK_CNT;
if (_amlmmc_read(mmc, blk, (unsigned char *)dtb, cnt)) {
pr_err("%s: block # %#x ERROR!\n",
__func__, blk);
} else {
ret = _verify_dtb_checksum(dtb);
if (!ret) {
info->stamp[cpy] = dtb->timestamp;
info->valid[cpy] = 1;
} else
pr_err("cpy %d is not valid\n", cpy);
}
valid += info->valid[cpy];
cpy--;
}
pr_info("total valid %d\n", valid);
kfree(dtb);
return ret;
}
int amlmmc_dtb_write(struct mmc_card *mmc,
unsigned char *buf, int len)
{
int ret = 0, blk;
int bit = mmc->csd.read_blkbits;
int cpy, valid;
struct aml_dtb_rsv *dtb = (struct aml_dtb_rsv *) buf;
struct aml_dtb_info *info = &dtb_infos;
int cnt = CONFIG_DTB_SIZE >> bit;
if (len > CONFIG_DTB_SIZE) {
pr_err("%s dtb data len too much", __func__);
return -EFAULT;
}
/* set info */
valid = info->valid[0] + info->valid[1];
if (valid == 0)
dtb->timestamp = 0;
else if (valid == 1) {
dtb->timestamp = 1 + info->stamp[info->valid[0]?0:1];
} else {
/* both are valid */
if (info->stamp[0] != info->stamp[1]) {
pr_info("timestamp are not same %d:%d\n",
info->stamp[0], info->stamp[1]);
dtb->timestamp = 1 +
(stamp_after(info->stamp[1], info->stamp[0]) ?
info->stamp[1]:info->stamp[0]);
} else
dtb->timestamp = 1 + info->stamp[0];
}
/*setting version and magic*/
dtb->version = 1; /* base version */
dtb->magic = 0x00447e41; /*A~D\0*/
dtb->checksum = _calc_dtb_checksum(dtb);
pr_info("stamp %d, checksum 0x%x, version %d, magic %s\n",
dtb->timestamp, dtb->checksum,
dtb->version, (char *)&dtb->magic);
/* write down... */
for (cpy = 0; cpy < DTB_COPIES; cpy++) {
blk = ((get_reserve_partition_off_from_tbl()
+ DTB_RESERVE_OFFSET) >> bit)
+ cpy * DTB_BLK_CNT;
ret |= _amlmmc_write(mmc, blk, buf, cnt);
}
return ret;
}
int amlmmc_dtb_read(struct mmc_card *card,
unsigned char *buf, int len)
{
int ret = 0, start_blk, size, blk_cnt;
int bit = card->csd.read_blkbits;
unsigned char *dst = NULL;
unsigned char *buffer = NULL;
if (len > CONFIG_DTB_SIZE) {
pr_err("%s dtb data len too much", __func__);
return -EFAULT;
}
memset(buf, 0x0, len);
start_blk = MMC_DTB_PART_OFFSET;
buffer = kmalloc(CONFIG_DTB_SIZE, GFP_KERNEL|__GFP_RECLAIM);
if (!buffer)
return -ENOMEM;
start_blk >>= bit;
size = CONFIG_DTB_SIZE;
blk_cnt = size>>bit;
dst = (unsigned char *)buffer;
while (blk_cnt != 0) {
memset(buffer, 0x0, DTB_CELL_SIZE);
ret = mmc_read_internal(card, start_blk, (DTB_CELL_SIZE>>bit), dst);
if (ret) {
pr_err("%s read dtb error", __func__);
ret = -EFAULT;
kfree(buffer);
return ret;
}
start_blk += (DTB_CELL_SIZE>>bit);
blk_cnt -= (DTB_CELL_SIZE>>bit);
memcpy(buf, dst, DTB_CELL_SIZE);
buf += DTB_CELL_SIZE;
}
kfree(buffer);
return ret;
}
static CLASS_ATTR(emmcdtb, 0644, NULL, NULL);
static CLASS_ATTR(emmcddr, 0644, NULL, NULL);
int mmc_dtb_open(struct inode *node, struct file *file)
{
return 0;
}
int mmc_ddr_parameter_open(struct inode *node, struct file *file)
{
return 0;
}
ssize_t mmc_dtb_read(struct file *file,
char __user *buf,
size_t count,
loff_t *ppos)
{
unsigned char *dtb_ptr = NULL;
ssize_t read_size = 0;
int ret = 0;
if (*ppos == CONFIG_DTB_SIZE)
return 0;
if (*ppos >= CONFIG_DTB_SIZE) {
pr_err("%s: out of space!", __func__);
return -EFAULT;
}
dtb_ptr = kmalloc(CONFIG_DTB_SIZE, GFP_KERNEL);
if (!dtb_ptr)
return -ENOMEM;
mmc_claim_host(card_dtb->host);
ret = amlmmc_dtb_read(card_dtb,
(unsigned char *)dtb_ptr,
CONFIG_DTB_SIZE);
if (ret) {
pr_err("%s: read failed:%d", __func__, ret);
ret = -EFAULT;
goto exit;
}
if ((*ppos + count) > CONFIG_DTB_SIZE)
read_size = CONFIG_DTB_SIZE - *ppos;
else
read_size = count;
ret = copy_to_user(buf, (dtb_ptr + *ppos), read_size);
*ppos += read_size;
exit:
mmc_release_host(card_dtb->host);
kfree(dtb_ptr);
return read_size;
}
ssize_t mmc_ddr_parameter_read(struct file *file,
char __user *buf,
size_t count,
loff_t *ppos)
{
unsigned char *dtb_ptr = NULL;
ssize_t read_size = 0;
int bit = card_dtb->csd.read_blkbits;
int ret = 0;
int cnt = CONFIG_DDR_PARAMETER_SIZE >> bit;
int blk = ((get_reserve_partition_off_from_tbl()
+ DDR_PARAMETER_OFFSET) >> bit);
if (*ppos == CONFIG_DDR_PARAMETER_SIZE)
return 0;
if (*ppos >= CONFIG_DDR_PARAMETER_SIZE) {
pr_err("%s: out of space!", __func__);
return -EFAULT;
}
dtb_ptr = kmalloc(CONFIG_DDR_PARAMETER_SIZE, GFP_KERNEL);
if (!dtb_ptr)
return -ENOMEM;
mmc_claim_host(card_dtb->host);
ret = _amlmmc_read(card_dtb, blk, (unsigned char *)dtb_ptr, cnt);
if (ret) {
pr_err("%s: read failed:%d", __func__, ret);
ret = -EFAULT;
goto exit;
}
if ((*ppos + count) > CONFIG_DDR_PARAMETER_SIZE)
read_size = CONFIG_DDR_PARAMETER_SIZE - *ppos;
else
read_size = count;
ret = copy_to_user(buf, (dtb_ptr + *ppos), read_size);
*ppos += read_size;
exit:
mmc_release_host(card_dtb->host);
kfree(dtb_ptr);
return read_size;
}
ssize_t mmc_dtb_write(struct file *file,
const char __user *buf,
size_t count, loff_t *ppos)
{
unsigned char *dtb_ptr = NULL;
ssize_t write_size = 0;
int ret = 0;
if (*ppos == CONFIG_DTB_SIZE)
return 0;
if (*ppos >= CONFIG_DTB_SIZE) {
pr_err("%s: out of space!", __func__);
return -EFAULT;
}
dtb_ptr = kmalloc(CONFIG_DTB_SIZE, GFP_KERNEL);
if (!dtb_ptr)
return -ENOMEM;
mmc_claim_host(card_dtb->host);
if ((*ppos + count) > CONFIG_DTB_SIZE)
write_size = CONFIG_DTB_SIZE - *ppos;
else
write_size = count;
ret = copy_from_user((dtb_ptr + *ppos), buf, write_size);
ret = amlmmc_dtb_write(card_dtb,
dtb_ptr, CONFIG_DTB_SIZE);
if (ret) {
pr_err("%s: write dtb failed", __func__);
ret = -EFAULT;
goto exit;
}
*ppos += write_size;
exit:
mmc_release_host(card_dtb->host);
kfree(dtb_ptr);
return write_size;
}
ssize_t mmc_ddr_parameter_write(struct file *file,
const char __user *buf,
size_t count, loff_t *ppos)
{
unsigned char *dtb_ptr = NULL;
ssize_t write_size = 0;
int bit = card_dtb->csd.read_blkbits;
int ret = 0;
int cnt = CONFIG_DDR_PARAMETER_SIZE >> bit;
int blk = ((get_reserve_partition_off_from_tbl()
+ DDR_PARAMETER_OFFSET) >> bit);
if (*ppos == CONFIG_DDR_PARAMETER_SIZE)
return 0;
if (*ppos >= CONFIG_DDR_PARAMETER_SIZE) {
pr_err("%s: out of space!", __func__);
return -EFAULT;
}
dtb_ptr = kmalloc(CONFIG_DDR_PARAMETER_SIZE, GFP_KERNEL);
if (!dtb_ptr)
return -ENOMEM;
mmc_claim_host(card_dtb->host);
if ((*ppos + count) > CONFIG_DDR_PARAMETER_SIZE)
write_size = CONFIG_DDR_PARAMETER_SIZE - *ppos;
else
write_size = count;
ret = copy_from_user((dtb_ptr + *ppos), buf, write_size);
ret = _amlmmc_write(card_dtb, blk, (unsigned char *)dtb_ptr, cnt);
if (ret) {
pr_err("%s: write dtb failed", __func__);
ret = -EFAULT;
goto exit;
}
*ppos += write_size;
exit:
mmc_release_host(card_dtb->host);
kfree(dtb_ptr);
return write_size;
}
long mmc_dtb_ioctl(struct file *file, unsigned int cmd, unsigned long args)
{
return 0;
}
long mmc_ddr_parameter_ioctl(struct file *file,
unsigned int cmd, unsigned long args)
{
return 0;
}
static const struct file_operations dtb_ops = {
.open = mmc_dtb_open,
.read = mmc_dtb_read,
.write = mmc_dtb_write,
.unlocked_ioctl = mmc_dtb_ioctl,
};
static const struct file_operations ddr_parameter_ops = {
.open = mmc_ddr_parameter_open,
.read = mmc_ddr_parameter_read,
.write = mmc_ddr_parameter_write,
.unlocked_ioctl = mmc_ddr_parameter_ioctl,
};
int amlmmc_dtb_init(struct mmc_card *card)
{
int ret = 0;
card_dtb = card;
pr_info("%s: register dtb chardev", __func__);
_dtb_init(card);
ret = alloc_chrdev_region(&amlmmc_dtb_no, 0, 1, DTB_NAME);
if (ret < 0) {
pr_err("alloc dtb dev_t no failed");
ret = -1;
goto exit_err;
}
cdev_init(&amlmmc_dtb, &dtb_ops);
amlmmc_dtb.owner = THIS_MODULE;
ret = cdev_add(&amlmmc_dtb, amlmmc_dtb_no, 1);
if (ret) {
pr_err("dtb dev add failed");
ret = -1;
goto exit_err1;
}
amlmmc_dtb_class = class_create(THIS_MODULE, DTB_NAME);
if (IS_ERR(amlmmc_dtb_class)) {
pr_err("dtb dev add failed");
ret = -1;
goto exit_err2;
}
ret = class_create_file(amlmmc_dtb_class, &class_attr_emmcdtb);
if (ret) {
pr_err("dtb dev add failed");
ret = -1;
goto exit_err2;
}
dtb_dev = device_create(amlmmc_dtb_class,
NULL,
amlmmc_dtb_no,
NULL,
DTB_NAME);
if (IS_ERR(dtb_dev)) {
pr_err("dtb dev add failed");
ret = -1;
goto exit_err3;
}
pr_info("%s: register dtb chardev OK", __func__);
return ret;
exit_err3:
class_remove_file(amlmmc_dtb_class, &class_attr_emmcdtb);
class_destroy(amlmmc_dtb_class);
exit_err2:
cdev_del(&amlmmc_dtb);
exit_err1:
unregister_chrdev_region(amlmmc_dtb_no, 1);
exit_err:
return ret;
}
int amlmmc_ddr_init(struct mmc_card *card)
{
int ret = 0;
pr_info("%s: register ddr_parameter chardev", __func__);
ret = alloc_chrdev_region(&amlmmc_ddr_no, 0, 1, DDR_NAME);
if (ret < 0) {
pr_err("alloc ddr parameter dev_t no failed");
ret = -1;
goto exit_err;
}
cdev_init(&amlmmc_ddr, &ddr_parameter_ops);
amlmmc_ddr.owner = THIS_MODULE;
ret = cdev_add(&amlmmc_ddr, amlmmc_ddr_no, 1);
if (ret) {
pr_err("ddr parameter dev add failed");
ret = -1;
goto exit_err1;
}
amlmmc_ddr_class = class_create(THIS_MODULE, DDR_NAME);
if (IS_ERR(amlmmc_ddr_class)) {
pr_err("ddr parameter dev add failed");
ret = -1;
goto exit_err2;
}
ret = class_create_file(amlmmc_ddr_class, &class_attr_emmcddr);
if (ret) {
pr_err("ddr parameter dev add failed");
ret = -1;
goto exit_err2;
}
ddr_dev = device_create(amlmmc_ddr_class,
NULL,
amlmmc_ddr_no,
NULL,
DDR_NAME);
if (IS_ERR(ddr_dev)) {
pr_err("ddr parameter dev add failed");
ret = -1;
goto exit_err3;
}
pr_info("%s: register ddr parameter chardev OK", __func__);
return ret;
exit_err3:
class_remove_file(amlmmc_ddr_class, &class_attr_emmcddr);
class_destroy(amlmmc_ddr_class);
exit_err2:
cdev_del(&amlmmc_ddr);
exit_err1:
unregister_chrdev_region(amlmmc_ddr_no, 1);
exit_err:
return ret;
}
/*
* Checks that a normal transfer didn't have any errors
*/
static int mmc_check_result(struct mmc_request *mrq)
{
int ret;
WARN_ON(!mrq || !mrq->cmd || !mrq->data);
ret = 0;
if (!ret && mrq->cmd->error)
ret = mrq->cmd->error;
if (!ret && mrq->data->error)
ret = mrq->data->error;
if (!ret && mrq->stop && mrq->stop->error)
ret = mrq->stop->error;
if (!ret && mrq->data->bytes_xfered !=
mrq->data->blocks * mrq->data->blksz)
ret = RESULT_FAIL;
if (ret == -EINVAL)
ret = RESULT_UNSUP_HOST;
return ret;
}
static void mmc_prepare_mrq(struct mmc_card *card,
struct mmc_request *mrq, struct scatterlist *sg,
unsigned int sg_len, unsigned int dev_addr, unsigned int blocks,
unsigned int blksz, int write)
{
WARN_ON(!mrq || !mrq->cmd || !mrq->data || !mrq->stop);
if (blocks > 1) {
mrq->cmd->opcode = write ?
MMC_WRITE_MULTIPLE_BLOCK : MMC_READ_MULTIPLE_BLOCK;
} else {
mrq->cmd->opcode = write ?
MMC_WRITE_BLOCK : MMC_READ_SINGLE_BLOCK;
}
mrq->cmd->arg = dev_addr;
if (!mmc_card_blockaddr(card))
mrq->cmd->arg <<= 9;
mrq->cmd->flags = MMC_RSP_R1 | MMC_CMD_ADTC;
if (blocks == 1)
mrq->stop = NULL;
else {
mrq->stop->opcode = MMC_STOP_TRANSMISSION;
mrq->stop->arg = 0;
mrq->stop->flags = MMC_RSP_R1B | MMC_CMD_AC;
}
mrq->data->blksz = blksz;
mrq->data->blocks = blocks;
mrq->data->flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
mrq->data->sg = sg;
mrq->data->sg_len = sg_len;
mmc_set_data_timeout(mrq->data, card);
}
unsigned int mmc_capacity(struct mmc_card *card)
{
if (!mmc_card_sd(card) && mmc_card_blockaddr(card))
return card->ext_csd.sectors;
else
return card->csd.capacity << (card->csd.read_blkbits - 9);
}
static int mmc_transfer(struct mmc_card *card, unsigned int dev_addr,
unsigned int blocks, void *buf, int write)
{
u8 original_part_config;
u8 user_part_number = 0;
u8 cur_part_number;
bool switch_partition = false;
unsigned int size;
struct scatterlist sg;
struct mmc_request mrq = {0};
struct mmc_command cmd = {0};
struct mmc_command stop = {0};
struct mmc_data data = {0};
int ret;
cur_part_number = card->ext_csd.part_config
&EXT_CSD_PART_CONFIG_ACC_MASK;
if (cur_part_number != user_part_number) {
switch_partition = true;
original_part_config = card->ext_csd.part_config;
cur_part_number = original_part_config
&(~EXT_CSD_PART_CONFIG_ACC_MASK);
ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_PART_CONFIG, cur_part_number,
card->ext_csd.part_time);
if (ret)
return ret;
card->ext_csd.part_config = cur_part_number;
}
if ((dev_addr + blocks) >= mmc_capacity(card)) {
pr_info("[%s] %s range exceeds device capacity!\n",
__func__, write?"write":"read");
ret = -1;
return ret;
}
size = blocks << card->csd.read_blkbits;
sg_init_one(&sg, buf, size);
mrq.cmd = &cmd;
mrq.data = &data;
mrq.stop = &stop;
mmc_prepare_mrq(card, &mrq, &sg, 1, dev_addr,
blocks, 1<<card->csd.read_blkbits, write);
mmc_wait_for_req(card->host, &mrq);
ret = mmc_check_result(&mrq);
if (switch_partition == true) {
ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_PART_CONFIG, original_part_config,
card->ext_csd.part_time);
if (ret)
return ret;
card->ext_csd.part_config = original_part_config;
}
return ret;
}
/*write tuning para on emmc, the offset is 0x14400*/
static int amlmmc_write_tuning_para(struct mmc_card *card,
unsigned int dev_addr)
{
unsigned int size;
struct amlsd_platform *pdata = mmc_priv(card->host);
struct aml_tuning_para *parameter = &pdata->para;
unsigned int *buf;
int para_size;
int blocks;
if (pdata->save_para == 0)
return 0;
if (parameter->update == 0)
return 0;
parameter->update = 0;
para_size = sizeof(struct aml_tuning_para);
blocks = (para_size - 1) / 512 + 1;
size = blocks << card->csd.read_blkbits;
buf = kmalloc(size, GFP_KERNEL);
memset(buf, 0, size);
memcpy(buf, parameter, sizeof(struct aml_tuning_para));
mmc_claim_host(card->host);
mmc_transfer(card, dev_addr, blocks, buf, 1);
mmc_release_host(card->host);
kfree(buf);
return 0;
}
int mmc_read_internal(struct mmc_card *card, unsigned int dev_addr,
unsigned int blocks, void *buf)
{
return mmc_transfer(card, dev_addr, blocks, buf, 0);
}
int mmc_write_internal(struct mmc_card *card, unsigned int dev_addr,
unsigned int blocks, void *buf)
{
return mmc_transfer(card, dev_addr, blocks, buf, 1);
}
static int mmc_partition_tbl_checksum_calc(
struct partitions *part, int part_num)
{
int i, j;
u32 checksum = 0, *p;
for (i = 0; i < part_num; i++) {
p = (u32 *)part;
for (j = sizeof(struct partitions)/sizeof(checksum);
j > 0; j--) {
checksum += *p;
p++;
}
}
return checksum;
}
int get_reserve_partition_off(struct mmc_card *card) /* byte unit */
{
int off = -1, storage_flag;
struct mmc_host *mmc_host = card->host;
struct amlsd_host *host = mmc_priv(mmc_host);
storage_flag = host->storage_flag;
if (!strcmp(mmc_hostname(mmc_host), "emmc"))
storage_flag = EMMC_BOOT_FLAG;
if ((storage_flag == EMMC_BOOT_FLAG)
|| (storage_flag == SPI_EMMC_FLAG)) {
off = MMC_BOOT_PARTITION_SIZE + MMC_BOOT_PARTITION_RESERVED;
} else if ((storage_flag == 0) || (storage_flag == -1)) {
if (POR_EMMC_BOOT()) {
off = MMC_BOOT_PARTITION_SIZE
+ MMC_BOOT_PARTITION_RESERVED;
} else if (POR_SPI_BOOT() || POR_CARD_BOOT()) {
off = 0;
} else { /* POR_NAND_BOOT */
off = -1;
}
} else { /* error, the storage device does NOT relate to eMMC */
off = -1;
}
if (off == -1)
pr_info(
"[%s] Error, NOT relate to eMMC,\"\" storage_flag=%d\n",
__func__, storage_flag);
return off;
}
int get_reserve_partition_off_from_tbl(void)
{
int i;
for (i = 0; i < pt_fmt->part_num; i++) {
if (!strcmp(pt_fmt->partitions[i].name, MMC_RESERVED_NAME))
return pt_fmt->partitions[i].offset;
}
return -1;
}
/* static void show_mmc_patition (struct partitions *part, int part_num)
* {
* int i, cnt_stuff;
* pr_info(" name offset size\n");
* pr_info("===========================\n");
* for (i=0; i < part_num ; i++) {
* pr_info("%4d: %s", i, part[i].name);
* cnt_stuff = sizeof(part[i].name) - strlen(part[i].name);
* // something is wrong
* if (cnt_stuff < 0)
* cnt_stuff = 0;
* cnt_stuff += 2;
* while (cnt_stuff--) {
* pr_info(" ");
* }
* pr_info("%18llx%18llx\n", part[i].offset, part[i].size);
* }
* }
*/
static int mmc_read_partition_tbl(struct mmc_card *card,
struct mmc_partitions_fmt *pt_fmt)
{
int ret = 0, start_blk, size, blk_cnt;
int bit = card->csd.read_blkbits;
int blk_size = 1 << bit; /* size of a block */
char *buf, *dst;
buf = kmalloc(blk_size, GFP_KERNEL);
if (buf == NULL) {
/* pr_info("malloc failed for buffer!\n");*/
ret = -ENOMEM;
goto exit_err;
}
memset(pt_fmt, 0, sizeof(struct mmc_partitions_fmt));
memset(buf, 0, blk_size);
start_blk = get_reserve_partition_off(card);
if (start_blk < 0) {
ret = -EINVAL;
goto exit_err;
}
start_blk >>= bit;
size = sizeof(struct mmc_partitions_fmt);
dst = (char *)pt_fmt;
if (size >= blk_size) {
blk_cnt = size >> bit;
ret = mmc_read_internal(card, start_blk, blk_cnt, dst);
if (ret) { /* error */
goto exit_err;
}
start_blk += blk_cnt;
dst += blk_cnt << bit;
size -= blk_cnt << bit;
}
if (size > 0) { /* the last block */
ret = mmc_read_internal(card, start_blk, 1, buf);
if (ret)
goto exit_err;
memcpy(dst, buf, size);
}
/* pr_info("Partition table stored in eMMC/TSD:\n"); */
/* pr_info("magic: %s, version: %s, checksum=%#x\n", */
/* pt_fmt->magic, pt_fmt->version, pt_fmt->checksum); */
/* show_mmc_patition(pt_fmt->partitions, pt_fmt->part_num); */
if ((strncmp(pt_fmt->magic,
MMC_PARTITIONS_MAGIC,
sizeof(pt_fmt->magic)) == 0) /* the same */
&& (pt_fmt->part_num > 0)
&& (pt_fmt->part_num <= MAX_MMC_PART_NUM)
&& (pt_fmt->checksum ==
mmc_partition_tbl_checksum_calc(
pt_fmt->partitions,
pt_fmt->part_num))) {
ret = 0; /* everything is OK now */
} else {
if (strncmp(pt_fmt->magic, MMC_PARTITIONS_MAGIC,
sizeof(pt_fmt->magic)) != 0) {
pr_info("magic error: %s\n",
(pt_fmt->magic)?pt_fmt->magic:"NULL");
} else if ((pt_fmt->part_num < 0)
|| (pt_fmt->part_num > MAX_MMC_PART_NUM)) {
pr_info("partition number error: %d\n",
pt_fmt->part_num);
} else {
pr_info(
"checksum error: pt_fmt->checksum=%d,calc_result=%d\n",
pt_fmt->checksum,
mmc_partition_tbl_checksum_calc(
pt_fmt->partitions,
pt_fmt->part_num));
}
pr_info("[%s]: partition verified error\n", __func__);
ret = -1; /* the partition information is invalid */
}
exit_err:
kfree(buf);
pr_info("[%s] mmc read partition %s!\n",