1 /* 2 * (C) Copyright 2000-2004 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * (C) Copyright 2011 6 * Texas Instruments, <www.ti.com> 7 * 8 * Matt Porter <mporter@ti.com> 9 * 10 * SPDX-License-Identifier: GPL-2.0+ 11 */ 12 #include <common.h> 13 #include <spl.h> 14 #include <xyzModem.h> 15 #include <asm/u-boot.h> 16 #include <asm/utils.h> 17 #include <libfdt.h> 18 19 #define BUF_SIZE 1024 20 21 /* 22 * Information required to load image using ymodem. 23 * 24 * @image_read: Now of bytes read from the image. 25 * @buf: pointer to the previous read block. 26 */ 27 struct ymodem_fit_info { 28 int image_read; 29 char *buf; 30 }; 31 32 static int getcymodem(void) { 33 if (tstc()) 34 return (getc()); 35 return -1; 36 } 37 38 static ulong ymodem_read_fit(struct spl_load_info *load, ulong offset, 39 ulong size, void *addr) 40 { 41 int res, err; 42 struct ymodem_fit_info *info = load->priv; 43 char *buf = info->buf; 44 45 while (info->image_read < offset) { 46 res = xyzModem_stream_read(buf, BUF_SIZE, &err); 47 if (res <= 0) 48 return res; 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 return res; 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(void) 72 { 73 int size = 0; 74 int err; 75 int res; 76 int ret; 77 connection_info_t info; 78 char buf[BUF_SIZE]; 79 ulong addr = 0; 80 81 info.mode = xyzModem_ymodem; 82 ret = xyzModem_stream_open(&info, &err); 83 if (ret) { 84 printf("spl: ymodem err - %s\n", xyzModem_error(err)); 85 return ret; 86 } 87 88 res = xyzModem_stream_read(buf, BUF_SIZE, &err); 89 if (res <= 0) 90 goto end_stream; 91 92 if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) && 93 image_get_magic((struct image_header *)buf) == FDT_MAGIC) { 94 struct spl_load_info load; 95 struct ymodem_fit_info info; 96 97 debug("Found FIT\n"); 98 load.dev = NULL; 99 load.priv = (void *)&info; 100 load.filename = NULL; 101 load.bl_len = 1; 102 info.buf = buf; 103 info.image_read = BUF_SIZE; 104 load.read = ymodem_read_fit; 105 ret = spl_load_simple_fit(&load, 0, (void *)buf); 106 size = info.image_read; 107 108 while ((res = xyzModem_stream_read(buf, BUF_SIZE, &err)) > 0) 109 size += res; 110 } else { 111 spl_parse_image_header((struct image_header *)buf); 112 ret = spl_parse_image_header((struct image_header *)buf); 113 if (ret) 114 return ret; 115 addr = spl_image.load_addr; 116 memcpy((void *)addr, buf, res); 117 size += res; 118 addr += res; 119 120 while ((res = xyzModem_stream_read(buf, BUF_SIZE, &err)) > 0) { 121 memcpy((void *)addr, buf, res); 122 size += res; 123 addr += res; 124 } 125 } 126 127 end_stream: 128 xyzModem_stream_close(&err); 129 xyzModem_stream_terminate(false, &getcymodem); 130 131 printf("Loaded %d bytes\n", size); 132 return 0; 133 } 134