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