platform: msm-shared: Add UBI image awareness to fastboot code
Current implementation of flasher in LK just writes the provided image as RAW data.
This is not good enough when writing a UBI image since some UBI META data should
be preserved.
When flashing a UBI image, the flasher should do the following for each non-bad PEB.
- Read the content of this PEB from the UBI image (PEB size bytes) into a buffer.
- Stripe min. I/O units full of 0xFF bytes from the end of the buffer Erase the PEB.
- Change the EC header in the buffer - put the new erase counter value there and
re-calculate the CRC-32 checksum.
- Write the buffer to the physical eraseblock.
Sometimes the flashed image is smaller than the partition. The remaining PEBs should be
erased and a new ec header written to them.
For each erased PEB a valid ec header should be written.
With the above mentioned changes the first boot time after flashing the image was
reduced by ~50%.
When flashing on an erased partition there is no need to re-erase the blocks. With this
change flashing time was reduced by additional 3%.
Change-Id: Ie131cc2ccbf64e92510a055fb57389ae17a7f45f
diff --git a/include/dev/flash-ubi.h b/include/dev/flash-ubi.h
index 09a7bc0..36e8c8a 100644
--- a/include/dev/flash-ubi.h
+++ b/include/dev/flash-ubi.h
@@ -39,10 +39,50 @@
#define UBI_MAGIC "UBI#"
#define UBI_MAGIC_SIZE 0x04
-inline int flash_ubi_img(struct ptentry *ptn, void *data, unsigned size)
-{
- dprintf(CRITICAL, "ERROR: flash_ubi_img not yet implemented\n");
- dprintf(CRITICAL, "falling back to flash_write\n");
- return flash_write(ptn, 0, data, size);
-}
+#define UBI_VERSION 1
+#define UBI_MAX_ERASECOUNTER 0x7FFFFFFF
+#define UBI_IMAGE_SEQ_BASE 0x12345678
+#define UBI_DEF_ERACE_COUNTER 0
+#define UBI_CRC32_INIT 0xFFFFFFFFU
+
+/* Erase counter header fields */
+struct __attribute__ ((packed)) ubi_ec_hdr {
+ uint32_t magic;
+ uint8_t version;
+ uint8_t padding1[3];
+ uint64_t ec; /* Warning: the current limit is 31-bit anyway! */
+ uint32_t vid_hdr_offset;
+ uint32_t data_offset;
+ uint32_t image_seq;
+ uint8_t padding2[32];
+ uint32_t hdr_crc;
+};
+
+#define UBI_EC_HDR_SIZE sizeof(struct ubi_ec_hdr)
+#define UBI_EC_HDR_SIZE_CRC (UBI_EC_HDR_SIZE - sizeof(uint32_t))
+
+/**
+ * struct ubi_scan_info - UBI scanning information.
+ * @ec: erase counters or eraseblock status for all eraseblocks
+ * @mean_ec: mean erase counter
+ * @bad_cnt: count of bad eraseblocks
+ * @good_cnt: count of non-bad eraseblocks
+ * @empty_cnt: count of empty eraseblocks
+ * @vid_hdr_offs: volume ID header offset from the found EC headers (%-1 means
+ * undefined)
+ * @data_offs: data offset from the found EC headers (%-1 means undefined)
+ * @image_seq: image sequence
+ */
+struct ubi_scan_info {
+ uint64_t *ec;
+ uint64_t mean_ec;
+ int bad_cnt;
+ int good_cnt;
+ int empty_cnt;
+ unsigned vid_hdr_offs;
+ unsigned data_offs;
+ uint32_t image_seq;
+};
+
+int flash_ubi_img(struct ptentry *ptn, void *data, unsigned size);
#endif
diff --git a/platform/msm_shared/flash-ubi.c b/platform/msm_shared/flash-ubi.c
new file mode 100644
index 0000000..b748bf6
--- /dev/null
+++ b/platform/msm_shared/flash-ubi.c
@@ -0,0 +1,518 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of The Linux Foundation. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <dev/flash-ubi.h>
+#include <dev/flash.h>
+#include <qpic_nand.h>
+#include <rand.h>
+
+static
+const uint32_t crc32_table[256] = {
+ 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
+ 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
+ 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
+ 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
+ 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
+ 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
+ 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
+ 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
+ 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
+ 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
+ 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
+ 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
+ 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
+ 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
+ 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
+ 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
+ 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
+ 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
+ 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
+ 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
+ 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
+ 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
+ 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
+ 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
+ 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
+ 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
+ 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
+ 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
+ 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
+ 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
+ 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
+ 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
+ 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
+ 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
+ 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
+ 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
+ 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
+ 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
+ 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
+ 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
+ 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
+ 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
+ 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
+ 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
+ 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
+ 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
+ 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
+ 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
+ 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
+ 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
+ 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
+ 0x2d02ef8dL
+};
+
+static uint32_t mtd_crc32(uint32_t crc, const void *buf, size_t size)
+{
+ const uint8_t *p = buf;
+
+ while (size--)
+ crc = crc32_table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
+ return crc;
+}
+
+/**
+ * check_pattern - check if buffer contains only a certain byte pattern.
+ * @buf: buffer to check
+ * @patt: the pattern to check
+ * @size: buffer size in bytes
+ *
+ * This function returns %1 if there are only @patt bytes in @buf, and %0 if
+ * something else was also found.
+ */
+int check_pattern(const void *buf, uint8_t patt, int size)
+{
+ int i;
+
+ for (i = 0; i < size; i++)
+ if (((const uint8_t *)buf)[i] != patt)
+ return 0;
+ return 1;
+}
+
+/**
+ * read_ec_hdr - read and check an erase counter header.
+ * @peb: number of the physical erase block to read the header for
+ * @ec_hdr: a &struct ubi_ec_hdr object where to store the read erase counter
+ * header
+ *
+ * This function reads erase counter header from physical eraseblock @peb and
+ * stores it in @ec_hdr. This function also checks the validity of the read
+ * header.
+ *
+ * Return codes:
+ * -1 - in case of error
+ * 0 - if PEB was found valid
+ * 1 - if PEB is empty
+ */
+static int read_ec_hdr(uint32_t peb, struct ubi_ec_hdr *ec_hdr)
+{
+ unsigned char *spare, *tmp_buf;
+ int ret = -1;
+ uint32_t crc;
+ int page_size = flash_page_size();
+ int num_pages_per_blk = flash_block_size()/page_size;
+
+ spare = (unsigned char *)malloc(flash_spare_size());
+ if (!spare)
+ {
+ dprintf(CRITICAL, "read_ec_hdr: Mem allocation failed\n");
+ return ret;
+ }
+
+ tmp_buf = (unsigned char *)malloc(page_size);
+ if (!tmp_buf)
+ {
+ dprintf(CRITICAL, "read_ec_hdr: Mem allocation failed\n");
+ goto out_tmp_buf;
+ }
+
+ if (qpic_nand_block_isbad(peb * num_pages_per_blk)) {
+ dprintf(CRITICAL, "read_ec_hdr: Bad block @ %d\n", peb);
+ goto out;
+ }
+
+ if (qpic_nand_read(peb * num_pages_per_blk, 1, tmp_buf, spare)) {
+ dprintf(CRITICAL, "read_ec_hdr: Read %d failed \n", peb);
+ goto out;
+ }
+ memcpy(ec_hdr, tmp_buf, UBI_EC_HDR_SIZE);
+
+ if (check_pattern((void *)ec_hdr, 0xFF, UBI_EC_HDR_SIZE)) {
+ ret = 1;
+ goto out;
+ }
+
+ /* Make sure we read a valid UBI EC_HEADER */
+ if (BE32(ec_hdr->magic) != (uint32_t)UBI_EC_HDR_MAGIC) {
+ dprintf(CRITICAL,
+ "read_ec_hdr: Wrong magic at peb-%d Expected: %d, received %d\n",
+ peb, UBI_EC_HDR_MAGIC, BE32(ec_hdr->magic));
+ goto out;
+ }
+
+ if (ec_hdr->version != UBI_VERSION) {
+ dprintf(CRITICAL,
+ "read_ec_hdr: Wrong version at peb-%d Expected: %d, received %d\n",
+ peb, UBI_VERSION, ec_hdr->version);
+ goto out;
+ }
+
+ if (BE64(ec_hdr->ec) > UBI_MAX_ERASECOUNTER) {
+ dprintf(CRITICAL,
+ "read_ec_hdr: Wrong ec at peb-%d: %lld \n",
+ peb, BE64(ec_hdr->ec));
+ goto out;
+ }
+
+ crc = mtd_crc32(UBI_CRC32_INIT, ec_hdr, UBI_EC_HDR_SIZE_CRC);
+ if (BE32(ec_hdr->hdr_crc) != crc) {
+ dprintf(CRITICAL,
+ "read_ec_hdr: Wrong crc at peb-%d: calculated %d, recived %d\n",
+ peb,crc, BE32(ec_hdr->hdr_crc));
+ goto out;
+ }
+
+ ret = 0;
+out:
+ free(tmp_buf);
+out_tmp_buf:
+ free(spare);
+ return ret;
+}
+
+/**
+ * write_ec_header() - Write provided ec_header for given PEB
+ * @peb: number of the physical erase block to write the header to
+ * @new_ech: the ec_header to write
+ *
+ * Return codes:
+ * -1 - in case of error
+ * 0 - on success
+ */
+static int write_ec_header(uint32_t peb, struct ubi_ec_hdr *new_ech)
+{
+ unsigned page_size = flash_page_size();
+ int num_pages_per_blk = flash_block_size()/page_size;
+ unsigned char *buf;
+ int ret = 0;
+
+ buf = malloc(sizeof(uint8_t) * page_size);
+ if (!buf) {
+ dprintf(CRITICAL, "write_ec_header: Mem allocation failed\n");
+ return -1;
+ }
+
+ memset(buf, 0, page_size);
+ ASSERT(page_size > sizeof(*new_ech));
+ memcpy(buf, new_ech, UBI_EC_HDR_SIZE);
+ ret = qpic_nand_write(peb * num_pages_per_blk, 1, buf, 0);
+ if (ret) {
+ dprintf(CRITICAL,
+ "write_ec_header: qpic_nand_write failed with %d\n", ret);
+ ret = -1;
+ goto out;
+ }
+
+out:
+ free(buf);
+ return ret;
+}
+
+/**
+ * scan_partition() - Collect the ec_headers info of a given partition
+ * @ptn: partition to read the headers of
+ *
+ * Returns allocated and filled struct ubi_scan_info (si).
+ * Note: si should be released by caller.
+ */
+static struct ubi_scan_info *scan_partition(struct ptentry *ptn)
+{
+ struct ubi_scan_info *si;
+ struct ubi_ec_hdr *ec_hdr;
+ unsigned i, curr_peb;
+ unsigned long long sum = 0;
+ int page_size = flash_page_size();
+ int ret;
+
+ si = malloc(sizeof(*si));
+ if (!si) {
+ dprintf(CRITICAL,"scan_partition: (%s) Memory allocation failed\n",
+ ptn->name);
+ return NULL;
+ }
+
+ memset((void *)si, 0, sizeof(*si));
+ si->ec = malloc(ptn->length * sizeof(uint64_t));
+ if (!si->ec) {
+ dprintf(CRITICAL,"scan_partition: (%s) Memory allocation failed\n",
+ ptn->name);
+ goto out_failed_ec;
+ }
+ memset((void *)si->ec, 0, ptn->length * sizeof(uint64_t));
+
+ ec_hdr = malloc(UBI_EC_HDR_SIZE);
+ if (!ec_hdr) {
+ dprintf(CRITICAL,"scan_partition: (%s) Memory allocation failed\n",
+ ptn->name);
+ goto out_failed;
+ }
+
+ curr_peb = ptn->start;
+ si->vid_hdr_offs = 0;
+ si->image_seq = rand() & UBI_IMAGE_SEQ_BASE;
+
+ for (i = 0; i < ptn->length; i++){
+ ret = read_ec_hdr(curr_peb + i, ec_hdr);
+ switch (ret) {
+ case 1:
+ si->empty_cnt++;
+ si->ec[i] = UBI_MAX_ERASECOUNTER;
+ break;
+ case 0:
+ if (!si->vid_hdr_offs) {
+ si->vid_hdr_offs = BE32(ec_hdr->vid_hdr_offset);
+ si->data_offs = BE32(ec_hdr->data_offset);
+ if (!si->vid_hdr_offs || !si->data_offs ||
+ si->vid_hdr_offs % page_size ||
+ si->data_offs % page_size) {
+ si->bad_cnt++;
+ si->ec[i] = UBI_MAX_ERASECOUNTER;
+ si->vid_hdr_offs = 0;
+ continue;
+ }
+ if (BE32(ec_hdr->vid_hdr_offset) != si->vid_hdr_offs) {
+ si->bad_cnt++;
+ si->ec[i] = UBI_MAX_ERASECOUNTER;
+ continue;
+ }
+ if (BE32(ec_hdr->data_offset) != si->data_offs) {
+ si->bad_cnt++;
+ si->ec[i] = UBI_MAX_ERASECOUNTER;
+ continue;
+ }
+ }
+ si->good_cnt++;
+ si->ec[i] = BE64(ec_hdr->ec);
+ break;
+ case -1:
+ default:
+ si->bad_cnt++;
+ si->ec[i] = UBI_MAX_ERASECOUNTER;
+ break;
+ }
+ }
+
+ /*
+ * If less then 95% of the PEBs were "bad" (didn't have valid
+ * ec header), then set mean_ec = UBI_DEF_ERACE_COUNTER.
+ */
+ sum = 0;
+ if (si->good_cnt && (double)(si->good_cnt / ptn->length) * 100 > 95) {
+ for (i = 0; i < ptn->length; i++) {
+ if (si->ec[i] == UBI_MAX_ERASECOUNTER)
+ continue;
+ sum += si->ec[i];
+ }
+ si->mean_ec = sum / si->good_cnt;
+ } else {
+ si->mean_ec = UBI_DEF_ERACE_COUNTER;
+ }
+ free(ec_hdr);
+ return si;
+
+out_failed:
+ free(si->ec);
+out_failed_ec:
+ free(si);
+ return NULL;
+}
+
+/**
+ * update_ec_header() - Update provided ec_header
+ * @si: pointer to struct ubi_scan_info, holding the collected
+ * ec_headers information of the partition
+ * @index: index in si->ec[] of this peb. Relative to ptn->start
+ * @new_header: False if this is an update of an existing header.
+ * True if new header needs to be filled in
+ */
+static void update_ec_header(struct ubi_ec_hdr *old_ech,
+ const struct ubi_scan_info *si,
+ int index, bool new_header)
+{
+ uint32_t crc;
+
+ if (si->ec[index] < UBI_MAX_ERASECOUNTER)
+ old_ech->ec = BE64(si->ec[index] + 1);
+ else
+ old_ech->ec = BE64(si->mean_ec);
+
+ if (new_header) {
+ old_ech->vid_hdr_offset = BE32(si->vid_hdr_offs);
+ old_ech->data_offset = BE32(si->data_offs);
+ old_ech->magic = BE32(UBI_EC_HDR_MAGIC);
+ old_ech->version = UBI_VERSION;
+ }
+ old_ech->image_seq = BE32(si->image_seq);
+ crc = mtd_crc32(UBI_CRC32_INIT,
+ (const void *)old_ech, UBI_EC_HDR_SIZE_CRC);
+ old_ech->hdr_crc = BE32(crc);
+}
+
+/**
+ * calc_data_len - calculate how much real data is stored in the buffer
+ * @page_size: min I/O of the device
+ * @buf: a buffer with the contents of the physical eraseblock
+ * @len: the buffer length
+ *
+ * This function calculates how much "real data" is stored in @buf and
+ * returns the length (in number of pages). Continuous 0xFF bytes at the end
+ * of the buffer are not considered as "real data".
+ */
+static int calc_data_len(int page_size, const void *buf, int len)
+{
+ int i;
+
+ for (i = len - 1; i >= 0; i--)
+ if (((const uint8_t *)buf)[i] != 0xFF)
+ break;
+
+ /* The resulting length must be aligned to the minimum flash I/O size */
+ len = i + 1;
+ len = (len + page_size - 1) / page_size;
+ return len;
+}
+
+/**
+ * flash_ubi_img() - Write the provided (UBI) image to given partition
+ * @ptn: partition to write the image to
+ * @data: the image to write
+ * @size: size of the image to write
+ *
+ * Return codes:
+ * -1 - in case of error
+ * 0 - on success
+ */
+int flash_ubi_img(struct ptentry *ptn, void *data, unsigned size)
+{
+ struct ubi_scan_info *si;
+ struct ubi_ec_hdr *old_ech;
+ struct ubi_ec_hdr new_ech;
+ uint32_t curr_peb = ptn->start;
+ void *img_peb;
+ unsigned page_size = flash_page_size();
+ unsigned block_size = flash_block_size();
+ int num_pages_per_blk = block_size / page_size;
+ int num_pages;
+ int ret, need_erase;
+
+ si = scan_partition(ptn);
+ if (!si) {
+ dprintf(CRITICAL, "flash_ubi_img: scan_partition failed\n");
+ return -1;
+ }
+
+ /*
+ * In case si->vid_hdr_offs is still -1 (non UBI image was
+ * flashed on device, get the value from the image to flush
+ */
+ if (!si->vid_hdr_offs){
+ struct ubi_ec_hdr *echd = (struct ubi_ec_hdr *)data;
+ si->vid_hdr_offs = BE32(echd->vid_hdr_offset);
+ si->data_offs = BE32(echd->data_offset);
+ }
+
+ need_erase = (si->empty_cnt == (int)ptn->length ? 0 : 1);
+ /* Update the "to be" flashed image and flash it */
+ img_peb = data;
+ while (size && curr_peb < ptn->start + ptn->length) {
+ if (need_erase && qpic_nand_blk_erase(curr_peb * num_pages_per_blk)) {
+ dprintf(CRITICAL, "flash_ubi_img: erase of %d failed\n",
+ curr_peb);
+ curr_peb++;
+ continue;
+ }
+
+ /* Update the ec_header in the image */
+ old_ech = (struct ubi_ec_hdr *)img_peb;
+ update_ec_header(old_ech, si, curr_peb - ptn->start, false);
+ if (size < block_size)
+ num_pages = size / page_size;
+ else
+ num_pages = calc_data_len(page_size, img_peb, block_size);
+ /* Write one block from image */
+ ret = qpic_nand_write(curr_peb * num_pages_per_blk,
+ num_pages, img_peb, 0);
+ if (ret) {
+ dprintf(CRITICAL, "flash_ubi_img: writing to peb-%d failed\n",
+ curr_peb);
+ curr_peb++;
+ continue;
+ }
+ if (size < block_size)
+ size = 0;
+ else
+ size -= block_size;
+ img_peb += flash_block_size();
+ curr_peb++;
+ }
+
+ if (size) {
+ dprintf(CRITICAL,
+ "flash_ubi_img: Not enough good blocks to flash image!");
+ ret = -1;
+ goto out;
+ }
+
+ /* Erase and write ec_header for the rest of the blocks */
+ for (; curr_peb < ptn->start + ptn->length; curr_peb++) {
+ if (need_erase && qpic_nand_blk_erase(curr_peb * num_pages_per_blk)) {
+ dprintf(INFO, "flash_ubi_img: erase of %d failed\n", curr_peb);
+ curr_peb++;
+ continue;
+ }
+ memset(&new_ech, 0xff, sizeof(new_ech));
+ update_ec_header(&new_ech, si, curr_peb - ptn->start, true);
+
+ /* Write new ec_header */
+ ret = write_ec_header(curr_peb, &new_ech);
+ if (ret) {
+ dprintf(CRITICAL, "flash_ubi_img: write ec_header to %d failed\n",
+ curr_peb);
+ curr_peb++;
+ continue;
+ }
+ }
+ ret = 0;
+out:
+ free(si->ec);
+ free(si);
+ return ret;
+}
diff --git a/platform/msm_shared/rules.mk b/platform/msm_shared/rules.mk
index 2040e16..15e664b 100755
--- a/platform/msm_shared/rules.mk
+++ b/platform/msm_shared/rules.mk
@@ -330,6 +330,7 @@
$(LOCAL_DIR)/board.o \
$(LOCAL_DIR)/spmi.o \
$(LOCAL_DIR)/qpic_nand.o \
+ $(LOCAL_DIR)/flash-ubi.o \
$(LOCAL_DIR)/bam.o \
$(LOCAL_DIR)/scm.o \
$(LOCAL_DIR)/dev_tree.o \
@@ -352,6 +353,7 @@
$(LOCAL_DIR)/board.o \
$(LOCAL_DIR)/spmi.o \
$(LOCAL_DIR)/qpic_nand.o \
+ $(LOCAL_DIR)/flash-ubi.o \
$(LOCAL_DIR)/bam.o \
$(LOCAL_DIR)/dev_tree.o \
$(LOCAL_DIR)/clock.o \