drivers/dfu/dfu_sf.c

   1 /*
   2  * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
   3  *
   4  * SPDX-License-Identifier: GPL-2.0+
   5  */
   6
   7 #include <common.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
  15 static int dfu_get_medium_size_sf(struct dfu_entity *dfu, u64 *size)
  16 {
  17         *size = dfu->data.sf.size;
  18
  19         return 0;
  20 }
  21
  22 static int dfu_read_medium_sf(struct dfu_entity *dfu, u64 offset, void *buf,
  23                 long *len)
  24 {
  25         return spi_flash_read(dfu->data.sf.dev, dfu->data.sf.start + offset,
  26                 *len, buf);
  27 }
  28
  29 static u64 find_sector(struct dfu_entity *dfu, u64 start, u64 offset)
  30 {
  31         return (lldiv((start + offset), dfu->data.sf.dev->sector_size)) *
  32                 dfu->data.sf.dev->sector_size;
  33 }
  34
  35 static int dfu_write_medium_sf(struct dfu_entity *dfu,
  36                 u64 offset, void *buf, long *len)
  37 {
  38         int ret;
  39
  40         ret = spi_flash_erase(dfu->data.sf.dev,
  41                               find_sector(dfu, dfu->data.sf.start, offset),
  42                               dfu->data.sf.dev->sector_size);
  43         if (ret)
  44                 return ret;
  45
  46         ret = spi_flash_write(dfu->data.sf.dev, dfu->data.sf.start + offset,
  47                               *len, buf);
  48         if (ret)
  49                 return ret;
  50
  51         return 0;
  52 }
  53
  54 static int dfu_flush_medium_sf(struct dfu_entity *dfu)
  55 {
  56         return 0;
  57 }
  58
  59 static unsigned int dfu_polltimeout_sf(struct dfu_entity *dfu)
  60 {
  61         return DFU_DEFAULT_POLL_TIMEOUT;
  62 }
  63
  64 static void dfu_free_entity_sf(struct dfu_entity *dfu)
  65 {
  66         spi_flash_free(dfu->data.sf.dev);
  67 }
  68
  69 static struct spi_flash *parse_dev(char *devstr)
  70 {
  71         unsigned int bus;
  72         unsigned int cs;
  73         unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
  74         unsigned int mode = CONFIG_SF_DEFAULT_MODE;
  75         char *s, *endp;
  76         struct spi_flash *dev;
  77
  78         s = strsep(&devstr, ":");
  79         if (!s || !*s || (bus = simple_strtoul(s, &endp, 0), *endp)) {
  80                 printf("Invalid SPI bus %s\n", s);
  81                 return NULL;
  82         }
  83
  84         s = strsep(&devstr, ":");
  85         if (!s || !*s || (cs = simple_strtoul(s, &endp, 0), *endp)) {
  86                 printf("Invalid SPI chip-select %s\n", s);
  87                 return NULL;
  88         }
  89
  90         s = strsep(&devstr, ":");
  91         if (s && *s) {
  92                 speed = simple_strtoul(s, &endp, 0);
  93                 if (*endp || !speed) {
  94                         printf("Invalid SPI speed %s\n", s);
  95                         return NULL;
  96                 }
  97         }
  98
  99         s = strsep(&devstr, ":");
 100         if (s && *s) {
 101                 mode = simple_strtoul(s, &endp, 0);
 102                 if (*endp || mode > 3) {
 103                         printf("Invalid SPI mode %s\n", s);
 104                         return NULL;
 105                 }
 106         }
 107
 108         dev = spi_flash_probe(bus, cs, speed, mode);
 109         if (!dev) {
 110                 printf("Failed to create SPI flash at %d:%d:%d:%d\n",
 111                        bus, cs, speed, mode);
 112                 return NULL;
 113         }
 114
 115         return dev;
 116 }
 117
 118 int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s)
 119 {
 120         char *st;
 121         char *devstr_bkup = strdup(devstr);
 122
 123         dfu->data.sf.dev = parse_dev(devstr_bkup);
 124         free(devstr_bkup);
 125         if (!dfu->data.sf.dev)
 126                 return -ENODEV;
 127
 128         dfu->dev_type = DFU_DEV_SF;
 129         dfu->max_buf_size = dfu->data.sf.dev->sector_size;
 130
 131         st = strsep(&s, " ");
 132         if (!strcmp(st, "raw")) {
 133                 dfu->layout = DFU_RAW_ADDR;
 134                 dfu->data.sf.start = simple_strtoul(s, &s, 16);
 135                 s++;
 136                 dfu->data.sf.size = simple_strtoul(s, &s, 16);
 137         } else {
 138                 printf("%s: Memory layout (%s) not supported!\n", __func__, st);
 139                 spi_flash_free(dfu->data.sf.dev);
 140                 return -1;
 141         }
 142
 143         dfu->get_medium_size = dfu_get_medium_size_sf;
 144         dfu->read_medium = dfu_read_medium_sf;
 145         dfu->write_medium = dfu_write_medium_sf;
 146         dfu->flush_medium = dfu_flush_medium_sf;
 147         dfu->poll_timeout = dfu_polltimeout_sf;
 148         dfu->free_entity = dfu_free_entity_sf;
 149
 150         /* initial state */
 151         dfu->inited = 0;
 152
 153         return 0;
 154 }