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