From 6f12ebf6ea7bcae1b6d9ff090b5c1e7452be90e9 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Wed, 11 Jun 2014 16:03:36 -0600 Subject: dfu: add SF backend This allows SPI Flash to be programmed using DFU. Signed-off-by: Stephen Warren --- drivers/dfu/dfu_sf.c | 139 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 139 insertions(+) create mode 100644 drivers/dfu/dfu_sf.c (limited to 'drivers/dfu/dfu_sf.c') diff --git a/drivers/dfu/dfu_sf.c b/drivers/dfu/dfu_sf.c new file mode 100644 index 0000000..91f6df2 --- /dev/null +++ b/drivers/dfu/dfu_sf.c @@ -0,0 +1,139 @@ +/* + * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include + +static long dfu_get_medium_size_sf(struct dfu_entity *dfu) +{ + return dfu->data.sf.size; +} + +static int dfu_read_medium_sf(struct dfu_entity *dfu, u64 offset, void *buf, + long *len) +{ + return spi_flash_read(dfu->data.sf.dev, offset, *len, buf); +} + +static int dfu_write_medium_sf(struct dfu_entity *dfu, + u64 offset, void *buf, long *len) +{ + int ret; + + ret = spi_flash_erase(dfu->data.sf.dev, offset, *len); + if (ret) + return ret; + + ret = spi_flash_write(dfu->data.sf.dev, offset, *len, buf); + if (ret) + return ret; + + return 0; +} + +static int dfu_flush_medium_sf(struct dfu_entity *dfu) +{ + return 0; +} + +static unsigned int dfu_polltimeout_sf(struct dfu_entity *dfu) +{ + return DFU_DEFAULT_POLL_TIMEOUT; +} + +static void dfu_free_entity_sf(struct dfu_entity *dfu) +{ + spi_flash_free(dfu->data.sf.dev); +} + +static struct spi_flash *parse_dev(char *devstr) +{ + unsigned int bus; + unsigned int cs; + unsigned int speed = CONFIG_SF_DEFAULT_SPEED; + unsigned int mode = CONFIG_SF_DEFAULT_MODE; + char *s, *endp; + struct spi_flash *dev; + + s = strsep(&devstr, ":"); + if (!s || !*s || (bus = simple_strtoul(s, &endp, 0), *endp)) { + printf("Invalid SPI bus %s\n", s); + return NULL; + } + + s = strsep(&devstr, ":"); + if (!s || !*s || (cs = simple_strtoul(s, &endp, 0), *endp)) { + printf("Invalid SPI chip-select %s\n", s); + return NULL; + } + + s = strsep(&devstr, ":"); + if (s && *s) { + speed = simple_strtoul(s, &endp, 0); + if (*endp || !speed) { + printf("Invalid SPI speed %s\n", s); + return NULL; + } + } + + s = strsep(&devstr, ":"); + if (s && *s) { + mode = simple_strtoul(s, &endp, 0); + if (*endp || mode > 3) { + printf("Invalid SPI mode %s\n", s); + return NULL; + } + } + + dev = spi_flash_probe(bus, cs, speed, mode); + if (!dev) { + printf("Failed to create SPI flash at %d:%d:%d:%d\n", + bus, cs, speed, mode); + return NULL; + } + + return dev; +} + +int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s) +{ + char *st; + + dfu->data.sf.dev = parse_dev(devstr); + if (!dfu->data.sf.dev) + return -ENODEV; + + dfu->dev_type = DFU_DEV_SF; + dfu->max_buf_size = dfu->data.sf.dev->sector_size; + + st = strsep(&s, " "); + if (!strcmp(st, "raw")) { + dfu->layout = DFU_RAW_ADDR; + dfu->data.sf.start = simple_strtoul(s, &s, 16); + s++; + dfu->data.sf.size = simple_strtoul(s, &s, 16); + } else { + printf("%s: Memory layout (%s) not supported!\n", __func__, st); + spi_flash_free(dfu->data.sf.dev); + return -1; + } + + dfu->get_medium_size = dfu_get_medium_size_sf; + dfu->read_medium = dfu_read_medium_sf; + dfu->write_medium = dfu_write_medium_sf; + dfu->flush_medium = dfu_flush_medium_sf; + dfu->poll_timeout = dfu_polltimeout_sf; + dfu->free_entity = dfu_free_entity_sf; + + /* initial state */ + dfu->inited = 0; + + return 0; +} -- cgit v1.1