1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
4 */
5
6 #include <common.h>
7 #include <flash.h>
8 #include <malloc.h>
9 #include <errno.h>
10 #include <div64.h>
11 #include <dfu.h>
12 #include <spi.h>
13 #include <spi_flash.h>
14 #include <jffs2/load_kernel.h>
15 #include <linux/mtd/mtd.h>
16
dfu_get_medium_size_sf(struct dfu_entity * dfu,u64 * size)17 static int dfu_get_medium_size_sf(struct dfu_entity *dfu, u64 *size)
18 {
19 *size = dfu->data.sf.size;
20
21 return 0;
22 }
23
dfu_read_medium_sf(struct dfu_entity * dfu,u64 offset,void * buf,long * len)24 static int dfu_read_medium_sf(struct dfu_entity *dfu, u64 offset, void *buf,
25 long *len)
26 {
27 long seglen = *len;
28 int ret;
29
30 if (seglen > (16 << 20))
31 seglen = (16 << 20);
32
33 ret = spi_flash_read(dfu->data.sf.dev, dfu->data.sf.start + offset,
34 seglen, buf);
35 if (!ret)
36 *len = seglen;
37
38 return ret;
39 }
40
find_sector(struct dfu_entity * dfu,u64 start,u64 offset)41 static u64 find_sector(struct dfu_entity *dfu, u64 start, u64 offset)
42 {
43 return (lldiv((start + offset), dfu->data.sf.dev->sector_size)) *
44 dfu->data.sf.dev->sector_size;
45 }
46
dfu_write_medium_sf(struct dfu_entity * dfu,u64 offset,void * buf,long * len)47 static int dfu_write_medium_sf(struct dfu_entity *dfu,
48 u64 offset, void *buf, long *len)
49 {
50 int ret;
51
52 ret = spi_flash_erase(dfu->data.sf.dev,
53 find_sector(dfu, dfu->data.sf.start, offset),
54 dfu->data.sf.dev->sector_size);
55 if (ret)
56 return ret;
57
58 ret = spi_flash_write(dfu->data.sf.dev, dfu->data.sf.start + offset,
59 *len, buf);
60 if (ret)
61 return ret;
62
63 return 0;
64 }
65
dfu_flush_medium_sf(struct dfu_entity * dfu)66 static int dfu_flush_medium_sf(struct dfu_entity *dfu)
67 {
68 u64 off, length;
69
70 if (!CONFIG_IS_ENABLED(DFU_SF_PART) || !dfu->data.sf.ubi)
71 return 0;
72
73 /* in case of ubi partition, erase rest of the partition */
74 off = find_sector(dfu, dfu->data.sf.start, dfu->offset);
75 /* last write ended with unaligned length jump to next */
76 if (off != dfu->data.sf.start + dfu->offset)
77 off += dfu->data.sf.dev->sector_size;
78 length = dfu->data.sf.start + dfu->data.sf.size - off;
79 if (length)
80 return spi_flash_erase(dfu->data.sf.dev, off, length);
81
82 return 0;
83 }
84
dfu_polltimeout_sf(struct dfu_entity * dfu)85 static unsigned int dfu_polltimeout_sf(struct dfu_entity *dfu)
86 {
87 /*
88 * Currently, Poll Timeout != 0 is only needed on nand
89 * ubi partition, as sectors which are not used need
90 * to be erased
91 */
92 if (CONFIG_IS_ENABLED(DFU_SF_PART) && dfu->data.sf.ubi)
93 return DFU_MANIFEST_POLL_TIMEOUT;
94
95 return DFU_DEFAULT_POLL_TIMEOUT;
96 }
97
dfu_free_entity_sf(struct dfu_entity * dfu)98 static void dfu_free_entity_sf(struct dfu_entity *dfu)
99 {
100 /*
101 * In the DM case it is not necessary to free the SPI device.
102 * For the non-DM case we must ensure that the the SPI device is only
103 * freed once.
104 */
105 if (!CONFIG_IS_ENABLED(DM_SPI_FLASH)) {
106 struct spi_flash *dev = dfu->data.sf.dev;
107
108 if (!dev)
109 return;
110 dfu->data.sf.dev = NULL;
111 list_for_each_entry(dfu, &dfu_list, list) {
112 if (dfu->data.sf.dev == dev)
113 dfu->data.sf.dev = NULL;
114 }
115 spi_flash_free(dev);
116 }
117 }
118
parse_dev(char * devstr)119 static struct spi_flash *parse_dev(char *devstr)
120 {
121 unsigned int bus;
122 unsigned int cs;
123 unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
124 unsigned int mode = CONFIG_SF_DEFAULT_MODE;
125 char *s, *endp;
126 struct spi_flash *dev;
127
128 s = strsep(&devstr, ":");
129 if (!s || !*s || (bus = simple_strtoul(s, &endp, 0), *endp)) {
130 printf("Invalid SPI bus %s\n", s);
131 return NULL;
132 }
133
134 s = strsep(&devstr, ":");
135 if (!s || !*s || (cs = simple_strtoul(s, &endp, 0), *endp)) {
136 printf("Invalid SPI chip-select %s\n", s);
137 return NULL;
138 }
139
140 s = strsep(&devstr, ":");
141 if (s && *s) {
142 speed = simple_strtoul(s, &endp, 0);
143 if (*endp || !speed) {
144 printf("Invalid SPI speed %s\n", s);
145 return NULL;
146 }
147 }
148
149 s = strsep(&devstr, ":");
150 if (s && *s) {
151 mode = simple_strtoul(s, &endp, 0);
152 if (*endp || mode > 3) {
153 printf("Invalid SPI mode %s\n", s);
154 return NULL;
155 }
156 }
157
158 dev = spi_flash_probe(bus, cs, speed, mode);
159 if (!dev) {
160 printf("Failed to create SPI flash at %u:%u:%u:%u\n",
161 bus, cs, speed, mode);
162 return NULL;
163 }
164
165 return dev;
166 }
167
dfu_fill_entity_sf(struct dfu_entity * dfu,char * devstr,char * s)168 int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s)
169 {
170 char *st;
171 char *devstr_bkup = strdup(devstr);
172
173 dfu->data.sf.dev = parse_dev(devstr_bkup);
174 free(devstr_bkup);
175 if (!dfu->data.sf.dev)
176 return -ENODEV;
177
178 dfu->dev_type = DFU_DEV_SF;
179 dfu->max_buf_size = dfu->data.sf.dev->sector_size;
180
181 st = strsep(&s, " ");
182 if (!strcmp(st, "raw")) {
183 dfu->layout = DFU_RAW_ADDR;
184 dfu->data.sf.start = hextoul(s, &s);
185 s++;
186 dfu->data.sf.size = hextoul(s, &s);
187 } else if (CONFIG_IS_ENABLED(DFU_SF_PART) &&
188 (!strcmp(st, "part") || !strcmp(st, "partubi"))) {
189 char mtd_id[32];
190 struct mtd_device *mtd_dev;
191 u8 part_num;
192 struct part_info *pi;
193 int ret, dev, part;
194
195 dfu->layout = DFU_RAW_ADDR;
196
197 dev = dectoul(s, &s);
198 s++;
199 part = dectoul(s, &s);
200
201 sprintf(mtd_id, "%s%d,%d", "nor", dev, part - 1);
202 printf("using id '%s'\n", mtd_id);
203
204 mtdparts_init();
205
206 ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num, &pi);
207 if (ret != 0) {
208 printf("Could not locate '%s'\n", mtd_id);
209 return -1;
210 }
211 dfu->data.sf.start = pi->offset;
212 dfu->data.sf.size = pi->size;
213 if (!strcmp(st, "partubi"))
214 dfu->data.sf.ubi = 1;
215 } else {
216 printf("%s: Memory layout (%s) not supported!\n", __func__, st);
217 spi_flash_free(dfu->data.sf.dev);
218 return -1;
219 }
220
221 dfu->get_medium_size = dfu_get_medium_size_sf;
222 dfu->read_medium = dfu_read_medium_sf;
223 dfu->write_medium = dfu_write_medium_sf;
224 dfu->flush_medium = dfu_flush_medium_sf;
225 dfu->poll_timeout = dfu_polltimeout_sf;
226 dfu->free_entity = dfu_free_entity_sf;
227
228 /* initial state */
229 dfu->inited = 0;
230
231 return 0;
232 }
233