1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
12 #include <spi_flash.h>
13 #include <jffs2/load_kernel.h>
14 #include <linux/mtd/mtd.h>
16 static int dfu_get_medium_size_sf(struct dfu_entity *dfu, u64 *size)
18 *size = dfu->data.sf.size;
23 static int dfu_read_medium_sf(struct dfu_entity *dfu, u64 offset, void *buf,
26 return spi_flash_read(dfu->data.sf.dev, dfu->data.sf.start + offset,
30 static u64 find_sector(struct dfu_entity *dfu, u64 start, u64 offset)
32 return (lldiv((start + offset), dfu->data.sf.dev->sector_size)) *
33 dfu->data.sf.dev->sector_size;
36 static int dfu_write_medium_sf(struct dfu_entity *dfu,
37 u64 offset, void *buf, long *len)
41 ret = spi_flash_erase(dfu->data.sf.dev,
42 find_sector(dfu, dfu->data.sf.start, offset),
43 dfu->data.sf.dev->sector_size);
47 ret = spi_flash_write(dfu->data.sf.dev, dfu->data.sf.start + offset,
55 static int dfu_flush_medium_sf(struct dfu_entity *dfu)
59 if (!CONFIG_IS_ENABLED(DFU_SF_PART) || !dfu->data.sf.ubi)
62 /* in case of ubi partition, erase rest of the partition */
63 off = find_sector(dfu, dfu->data.sf.start, dfu->offset);
64 /* last write ended with unaligned length jump to next */
65 if (off != dfu->data.sf.start + dfu->offset)
66 off += dfu->data.sf.dev->sector_size;
67 length = dfu->data.sf.start + dfu->data.sf.size - off;
69 return spi_flash_erase(dfu->data.sf.dev, off, length);
74 static unsigned int dfu_polltimeout_sf(struct dfu_entity *dfu)
77 * Currently, Poll Timeout != 0 is only needed on nand
78 * ubi partition, as sectors which are not used need
81 if (CONFIG_IS_ENABLED(DFU_SF_PART) && dfu->data.sf.ubi)
82 return DFU_MANIFEST_POLL_TIMEOUT;
84 return DFU_DEFAULT_POLL_TIMEOUT;
87 static void dfu_free_entity_sf(struct dfu_entity *dfu)
89 spi_flash_free(dfu->data.sf.dev);
92 static struct spi_flash *parse_dev(char *devstr)
96 unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
97 unsigned int mode = CONFIG_SF_DEFAULT_MODE;
99 struct spi_flash *dev;
101 s = strsep(&devstr, ":");
102 if (!s || !*s || (bus = simple_strtoul(s, &endp, 0), *endp)) {
103 printf("Invalid SPI bus %s\n", s);
107 s = strsep(&devstr, ":");
108 if (!s || !*s || (cs = simple_strtoul(s, &endp, 0), *endp)) {
109 printf("Invalid SPI chip-select %s\n", s);
113 s = strsep(&devstr, ":");
115 speed = simple_strtoul(s, &endp, 0);
116 if (*endp || !speed) {
117 printf("Invalid SPI speed %s\n", s);
122 s = strsep(&devstr, ":");
124 mode = simple_strtoul(s, &endp, 0);
125 if (*endp || mode > 3) {
126 printf("Invalid SPI mode %s\n", s);
131 dev = spi_flash_probe(bus, cs, speed, mode);
133 printf("Failed to create SPI flash at %d:%d:%d:%d\n",
134 bus, cs, speed, mode);
141 int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s)
144 char *devstr_bkup = strdup(devstr);
146 dfu->data.sf.dev = parse_dev(devstr_bkup);
148 if (!dfu->data.sf.dev)
151 dfu->dev_type = DFU_DEV_SF;
152 dfu->max_buf_size = dfu->data.sf.dev->sector_size;
154 st = strsep(&s, " ");
155 if (!strcmp(st, "raw")) {
156 dfu->layout = DFU_RAW_ADDR;
157 dfu->data.sf.start = simple_strtoul(s, &s, 16);
159 dfu->data.sf.size = simple_strtoul(s, &s, 16);
160 } else if (CONFIG_IS_ENABLED(DFU_SF_PART) &&
161 (!strcmp(st, "part") || !strcmp(st, "partubi"))) {
163 struct mtd_device *mtd_dev;
165 struct part_info *pi;
168 dfu->layout = DFU_RAW_ADDR;
170 dev = simple_strtoul(s, &s, 10);
172 part = simple_strtoul(s, &s, 10);
174 sprintf(mtd_id, "%s%d,%d", "nor", dev, part - 1);
175 printf("using id '%s'\n", mtd_id);
179 ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num, &pi);
181 printf("Could not locate '%s'\n", mtd_id);
184 dfu->data.sf.start = pi->offset;
185 dfu->data.sf.size = pi->size;
186 if (!strcmp(st, "partubi"))
187 dfu->data.sf.ubi = 1;
189 printf("%s: Memory layout (%s) not supported!\n", __func__, st);
190 spi_flash_free(dfu->data.sf.dev);
194 dfu->get_medium_size = dfu_get_medium_size_sf;
195 dfu->read_medium = dfu_read_medium_sf;
196 dfu->write_medium = dfu_write_medium_sf;
197 dfu->flush_medium = dfu_flush_medium_sf;
198 dfu->poll_timeout = dfu_polltimeout_sf;
199 dfu->free_entity = dfu_free_entity_sf;