LXR uboot/drivers/dfu/dfu

   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
  15static 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
  22static 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
  29static 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
  35static 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
  54static int dfu_flush_medium_sf(struct dfu_entity *dfu)
  55{
  56        return 0;
  57}
  58
  59static unsigned int dfu_polltimeout_sf(struct dfu_entity *dfu)
  60{
  61        return DFU_DEFAULT_POLL_TIMEOUT;
  62}
  63
  64static void dfu_free_entity_sf(struct dfu_entity *dfu)
  65{
  66        spi_flash_free(dfu->data.sf.dev);
  67}
  68
  69static 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
 118int 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}
 155