1 /* 2 * (C) Copyright 2013 3 * Afzal Mohammed <afzal.mohd.ma@gmail.com> 4 * 5 * Reference: dfu_mmc.c 6 * Copyright (C) 2012 Samsung Electronics 7 * author: Lukasz Majewski <l.majewski@samsung.com> 8 * 9 * SPDX-License-Identifier: GPL-2.0+ 10 */ 11 12 #include <common.h> 13 #include <malloc.h> 14 #include <errno.h> 15 #include <dfu.h> 16 17 static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu, 18 u64 offset, void *buf, long *len) 19 { 20 if (dfu->layout != DFU_RAM_ADDR) { 21 error("unsupported layout: %s\n", dfu_get_layout(dfu->layout)); 22 return -EINVAL; 23 } 24 25 if (offset > dfu->data.ram.size) { 26 error("request exceeds allowed area\n"); 27 return -EINVAL; 28 } 29 30 if (op == DFU_OP_WRITE) 31 memcpy(dfu->data.ram.start + offset, buf, *len); 32 else 33 memcpy(buf, dfu->data.ram.start + offset, *len); 34 35 return 0; 36 } 37 38 static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset, 39 void *buf, long *len) 40 { 41 return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len); 42 } 43 44 static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset, 45 void *buf, long *len) 46 { 47 if (!*len) { 48 *len = dfu->data.ram.size; 49 return 0; 50 } 51 52 return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len); 53 } 54 55 int dfu_fill_entity_ram(struct dfu_entity *dfu, char *s) 56 { 57 char *st; 58 59 dfu->dev_type = DFU_DEV_RAM; 60 st = strsep(&s, " "); 61 if (strcmp(st, "ram")) { 62 error("unsupported device: %s\n", st); 63 return -ENODEV; 64 } 65 66 dfu->layout = DFU_RAM_ADDR; 67 dfu->data.ram.start = (void *)simple_strtoul(s, &s, 16); 68 s++; 69 dfu->data.ram.size = simple_strtoul(s, &s, 16); 70 71 dfu->write_medium = dfu_write_medium_ram; 72 dfu->read_medium = dfu_read_medium_ram; 73 74 dfu->inited = 0; 75 76 return 0; 77 } 78