common/spl/spl_ymodem.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2000-2004
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  *
   6  * (C) Copyright 2011
   7  * Texas Instruments, <www.ti.com>
   8  *
   9  * Matt Porter <mporter@ti.com>
  10  */
  11 #include <common.h>
  12 #include <gzip.h>
  13 #include <spl.h>
  14 #include <xyzModem.h>
  15 #include <asm/u-boot.h>
  16 #include <linux/libfdt.h>
  17
  18 #define BUF_SIZE 1024
  19
  20 /*
  21  * Information required to load image using ymodem.
  22  *
  23  * @image_read: Now of bytes read from the image.
  24  * @buf: pointer to the previous read block.
  25  */
  26 struct ymodem_fit_info {
  27         int image_read;
  28         char *buf;
  29 };
  30
  31 static int getcymodem(void) {
  32         if (tstc())
  33                 return (getc());
  34         return -1;
  35 }
  36
  37 static ulong ymodem_read_fit(struct spl_load_info *load, ulong offset,
  38                              ulong size, void *addr)
  39 {
  40         int res, err;
  41         struct ymodem_fit_info *info = load->priv;
  42         char *buf = info->buf;
  43
  44         while (info->image_read < offset) {
  45                 res = xyzModem_stream_read(buf, BUF_SIZE, &err);
  46                 if (res <= 0)
  47                         break;
  48
  49                 info->image_read += res;
  50         }
  51
  52         if (info->image_read > offset) {
  53                 res = info->image_read - offset;
  54                 memcpy(addr, &buf[BUF_SIZE - res], res);
  55                 addr = addr + res;
  56         }
  57
  58         while (info->image_read < offset + size) {
  59                 res = xyzModem_stream_read(buf, BUF_SIZE, &err);
  60                 if (res <= 0)
  61                         break;
  62
  63                 memcpy(addr, buf, res);
  64                 info->image_read += res;
  65                 addr += res;
  66         }
  67
  68         return size;
  69 }
  70
  71 int spl_ymodem_load_image(struct spl_image_info *spl_image,
  72                           struct spl_boot_device *bootdev)
  73 {
  74         ulong size = 0;
  75         int err;
  76         int res;
  77         int ret;
  78         connection_info_t info;
  79         char buf[BUF_SIZE];
  80         struct image_header *ih = NULL;
  81         ulong addr = 0;
  82
  83         info.mode = xyzModem_ymodem;
  84         ret = xyzModem_stream_open(&info, &err);
  85         if (ret) {
  86                 printf("spl: ymodem err - %s\n", xyzModem_error(err));
  87                 return ret;
  88         }
  89
  90         res = xyzModem_stream_read(buf, BUF_SIZE, &err);
  91         if (res <= 0)
  92                 goto end_stream;
  93
  94         if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL) &&
  95             image_get_magic((struct image_header *)buf) == FDT_MAGIC) {
  96                 addr = CONFIG_SYS_LOAD_ADDR;
  97                 ih = (struct image_header *)addr;
  98
  99                 memcpy((void *)addr, buf, res);
 100                 size += res;
 101                 addr += res;
 102
 103                 while ((res = xyzModem_stream_read(buf, BUF_SIZE, &err)) > 0) {
 104                         memcpy((void *)addr, buf, res);
 105                         size += res;
 106                         addr += res;
 107                 }
 108
 109                 ret = spl_parse_image_header(spl_image, ih);
 110                 if (ret)
 111                         return ret;
 112         } else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
 113             image_get_magic((struct image_header *)buf) == FDT_MAGIC) {
 114                 struct spl_load_info load;
 115                 struct ymodem_fit_info info;
 116
 117                 debug("Found FIT\n");
 118                 load.dev = NULL;
 119                 load.priv = (void *)&info;
 120                 load.filename = NULL;
 121                 load.bl_len = 1;
 122                 info.buf = buf;
 123                 info.image_read = BUF_SIZE;
 124                 load.read = ymodem_read_fit;
 125                 ret = spl_load_simple_fit(spl_image, &load, 0, (void *)buf);
 126                 size = info.image_read;
 127
 128                 while ((res = xyzModem_stream_read(buf, BUF_SIZE, &err)) > 0)
 129                         size += res;
 130         } else {
 131                 ih = (struct image_header *)buf;
 132                 ret = spl_parse_image_header(spl_image, ih);
 133                 if (ret)
 134                         goto end_stream;
 135 #ifdef CONFIG_SPL_GZIP
 136                 if (ih->ih_comp == IH_COMP_GZIP)
 137                         addr = CONFIG_SYS_LOAD_ADDR;
 138                 else
 139 #endif
 140                         addr = spl_image->load_addr;
 141                 memcpy((void *)addr, buf, res);
 142                 ih = (struct image_header *)addr;
 143                 size += res;
 144                 addr += res;
 145
 146                 while ((res = xyzModem_stream_read(buf, BUF_SIZE, &err)) > 0) {
 147                         memcpy((void *)addr, buf, res);
 148                         size += res;
 149                         addr += res;
 150                 }
 151         }
 152
 153 end_stream:
 154         xyzModem_stream_close(&err);
 155         xyzModem_stream_terminate(false, &getcymodem);
 156
 157         printf("Loaded %lu bytes\n", size);
 158
 159 #ifdef CONFIG_SPL_GZIP
 160         if (!(IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
 161               image_get_magic((struct image_header *)buf) == FDT_MAGIC) &&
 162             (ih->ih_comp == IH_COMP_GZIP)) {
 163                 if (gunzip((void *)(spl_image->load_addr + sizeof(*ih)),
 164                            CONFIG_SYS_BOOTM_LEN,
 165                            (void *)(CONFIG_SYS_LOAD_ADDR + sizeof(*ih)),
 166                            &size)) {
 167                         puts("Uncompressing error\n");
 168                         return -EIO;
 169                 }
 170         }
 171 #endif
 172
 173         return ret;
 174 }
 175 SPL_LOAD_IMAGE_METHOD("UART", 0, BOOT_DEVICE_UART, spl_ymodem_load_image);