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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
*/
#include <malloc.h>
#include <errno.h>
#include <div64.h>
#include <dfu.h>
#include <spi.h>
#include <spi_flash.h>
#include <jffs2/load_kernel.h>
#include <linux/mtd/mtd.h>
#include <linux/ctype.h>
static int dfu_get_medium_size_sf(struct dfu_entity *dfu, u64 *size)
{
*size = dfu->data.sf.size;
return 0;
}
static int dfu_read_medium_sf(struct dfu_entity *dfu, u64 offset, void *buf,
long *len)
{
long seglen = *len;
int ret;
if (seglen > (16 << 20))
seglen = (16 << 20);
ret = spi_flash_read(dfu->data.sf.dev, dfu->data.sf.start + offset,
seglen, buf);
if (!ret)
*len = seglen;
return ret;
}
static u64 find_sector(struct dfu_entity *dfu, u64 start, u64 offset)
{
return (lldiv((start + offset), dfu->data.sf.dev->sector_size)) *
dfu->data.sf.dev->sector_size;
}
static int dfu_write_medium_sf(struct dfu_entity *dfu,
u64 offset, void *buf, long *len)
{
int ret;
ret = spi_flash_erase(dfu->data.sf.dev,
find_sector(dfu, dfu->data.sf.start, offset),
dfu->data.sf.dev->sector_size);
if (ret)
return ret;
ret = spi_flash_write(dfu->data.sf.dev, dfu->data.sf.start + offset,
*len, buf);
if (ret)
return ret;
return 0;
}
static int dfu_flush_medium_sf(struct dfu_entity *dfu)
{
u64 off, length;
if (!CONFIG_IS_ENABLED(DFU_SF_PART) || !dfu->data.sf.ubi)
return 0;
/* in case of ubi partition, erase rest of the partition */
off = find_sector(dfu, dfu->data.sf.start, dfu->offset);
/* last write ended with unaligned length jump to next */
if (off != dfu->data.sf.start + dfu->offset)
off += dfu->data.sf.dev->sector_size;
length = dfu->data.sf.start + dfu->data.sf.size - off;
if (length)
return spi_flash_erase(dfu->data.sf.dev, off, length);
return 0;
}
static unsigned int dfu_polltimeout_sf(struct dfu_entity *dfu)
{
/*
* Currently, Poll Timeout != 0 is only needed on nand
* ubi partition, as sectors which are not used need
* to be erased
*/
if (CONFIG_IS_ENABLED(DFU_SF_PART) && dfu->data.sf.ubi)
return DFU_MANIFEST_POLL_TIMEOUT;
return DFU_DEFAULT_POLL_TIMEOUT;
}
static void dfu_free_entity_sf(struct dfu_entity *dfu)
{
/*
* In the DM case it is not necessary to free the SPI device.
* For the non-DM case we must ensure that the the SPI device is only
* freed once.
*/
if (!CONFIG_IS_ENABLED(DM_SPI_FLASH)) {
struct spi_flash *dev = dfu->data.sf.dev;
if (!dev)
return;
dfu->data.sf.dev = NULL;
list_for_each_entry(dfu, &dfu_list, list) {
if (dfu->data.sf.dev == dev)
dfu->data.sf.dev = NULL;
}
spi_flash_free(dev);
}
}
static struct spi_flash *parse_dev(char *devstr)
{
unsigned int bus;
unsigned int cs;
unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
unsigned int mode = CONFIG_SF_DEFAULT_MODE;
char *s, *endp;
struct spi_flash *dev;
s = strsep(&devstr, ":");
if (!s || !*s || (bus = simple_strtoul(s, &endp, 0), *endp)) {
printf("Invalid SPI bus %s\n", s);
return NULL;
}
s = strsep(&devstr, ":");
if (!s || !*s || (cs = simple_strtoul(s, &endp, 0), *endp)) {
printf("Invalid SPI chip-select %s\n", s);
return NULL;
}
s = strsep(&devstr, ":");
if (s && *s) {
speed = simple_strtoul(s, &endp, 0);
if (*endp || !speed) {
printf("Invalid SPI speed %s\n", s);
return NULL;
}
}
s = strsep(&devstr, ":");
if (s && *s) {
mode = simple_strtoul(s, &endp, 0);
if (*endp || mode > 3) {
printf("Invalid SPI mode %s\n", s);
return NULL;
}
}
dev = spi_flash_probe(bus, cs, speed, mode);
if (!dev) {
printf("Failed to create SPI flash at %u:%u:%u:%u\n",
bus, cs, speed, mode);
return NULL;
}
return dev;
}
int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char **argv, int argc)
{
char *s;
char *devstr_bkup = strdup(devstr);
dfu->data.sf.dev = parse_dev(devstr_bkup);
free(devstr_bkup);
if (!dfu->data.sf.dev)
return -ENODEV;
dfu->dev_type = DFU_DEV_SF;
dfu->max_buf_size = dfu->data.sf.dev->sector_size;
if (argc != 3)
return -EINVAL;
if (!strcmp(argv[0], "raw")) {
dfu->layout = DFU_RAW_ADDR;
dfu->data.sf.start = hextoul(argv[1], &s);
if (*s)
return -EINVAL;
dfu->data.sf.size = hextoul(argv[2], &s);
if (*s)
return -EINVAL;
} else if (CONFIG_IS_ENABLED(DFU_SF_PART) &&
(!strcmp(argv[0], "part") || !strcmp(argv[0], "partubi"))) {
char mtd_id[32];
struct mtd_device *mtd_dev;
u8 part_num;
struct part_info *pi;
int ret, dev, part;
dfu->layout = DFU_RAW_ADDR;
dev = dectoul(argv[1], &s);
if (*s)
return -EINVAL;
part = dectoul(argv[2], &s);
if (*s)
return -EINVAL;
sprintf(mtd_id, "%s%d,%d", "nor", dev, part - 1);
printf("using id '%s'\n", mtd_id);
mtdparts_init();
ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num, &pi);
if (ret != 0) {
printf("Could not locate '%s'\n", mtd_id);
return -1;
}
dfu->data.sf.start = pi->offset;
dfu->data.sf.size = pi->size;
if (!strcmp(argv[0], "partubi"))
dfu->data.sf.ubi = 1;
} else {
printf("%s: Memory layout (%s) not supported!\n", __func__, argv[0]);
spi_flash_free(dfu->data.sf.dev);
return -1;
}
dfu->get_medium_size = dfu_get_medium_size_sf;
dfu->read_medium = dfu_read_medium_sf;
dfu->write_medium = dfu_write_medium_sf;
dfu->flush_medium = dfu_flush_medium_sf;
dfu->poll_timeout = dfu_polltimeout_sf;
dfu->free_entity = dfu_free_entity_sf;
/* initial state */
dfu->inited = 0;
return 0;
}
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