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 pr_err("unsupported layout: %s\n", dfu_get_layout(dfu->layout)); 22 return -EINVAL; 23 } 24 25 if (offset > dfu->data.ram.size) { 26 pr_err("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 int dfu_get_medium_size_ram(struct dfu_entity *dfu, u64 *size) 45 { 46 *size = dfu->data.ram.size; 47 48 return 0; 49 } 50 51 static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset, 52 void *buf, long *len) 53 { 54 return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len); 55 } 56 57 int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr, char *s) 58 { 59 const char *argv[3]; 60 const char **parg = argv; 61 62 for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) { 63 *parg = strsep(&s, " "); 64 if (*parg == NULL) { 65 pr_err("Invalid number of arguments.\n"); 66 return -ENODEV; 67 } 68 } 69 70 dfu->dev_type = DFU_DEV_RAM; 71 if (strcmp(argv[0], "ram")) { 72 pr_err("unsupported device: %s\n", argv[0]); 73 return -ENODEV; 74 } 75 76 dfu->layout = DFU_RAM_ADDR; 77 dfu->data.ram.start = (void *)simple_strtoul(argv[1], NULL, 16); 78 dfu->data.ram.size = simple_strtoul(argv[2], NULL, 16); 79 80 dfu->write_medium = dfu_write_medium_ram; 81 dfu->get_medium_size = dfu_get_medium_size_ram; 82 dfu->read_medium = dfu_read_medium_ram; 83 84 dfu->inited = 0; 85 86 return 0; 87 } 88