diff options
Diffstat (limited to 'drivers/dfu/dfu_ram.c')
-rw-r--r-- | drivers/dfu/dfu_ram.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/dfu/dfu_ram.c b/drivers/dfu/dfu_ram.c new file mode 100644 index 0000000..335a8e1 --- /dev/null +++ b/drivers/dfu/dfu_ram.c @@ -0,0 +1,77 @@ +/* + * (C) Copyright 2013 + * Afzal Mohammed <afzal.mohd.ma@gmail.com> + * + * Reference: dfu_mmc.c + * Copyright (C) 2012 Samsung Electronics + * author: Lukasz Majewski <l.majewski@samsung.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <malloc.h> +#include <errno.h> +#include <dfu.h> + +static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu, + u64 offset, void *buf, long *len) +{ + if (dfu->layout != DFU_RAM_ADDR) { + error("unsupported layout: %s\n", dfu_get_layout(dfu->layout)); + return -EINVAL; + } + + if (offset > dfu->data.ram.size) { + error("request exceeds allowed area\n"); + return -EINVAL; + } + + if (op == DFU_OP_WRITE) + memcpy(dfu->data.ram.start + offset, buf, *len); + else + memcpy(buf, dfu->data.ram.start + offset, *len); + + return 0; +} + +static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset, + void *buf, long *len) +{ + return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len); +} + +static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset, + void *buf, long *len) +{ + if (!*len) { + *len = dfu->data.ram.size; + return 0; + } + + return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len); +} + +int dfu_fill_entity_ram(struct dfu_entity *dfu, char *s) +{ + char *st; + + dfu->dev_type = DFU_DEV_RAM; + st = strsep(&s, " "); + if (strcmp(st, "ram")) { + error("unsupported device: %s\n", st); + return -ENODEV; + } + + dfu->layout = DFU_RAM_ADDR; + dfu->data.ram.start = (void *)simple_strtoul(s, &s, 16); + s++; + dfu->data.ram.size = simple_strtoul(s, &s, 16); + + dfu->write_medium = dfu_write_medium_ram; + dfu->read_medium = dfu_read_medium_ram; + + dfu->inited = 0; + + return 0; +} |