dfu: add SF backend

This allows SPI Flash to be programmed using DFU.

Signed-off-by: Stephen Warren <swarren@nvidia.com>

3 files changed, 143 insertions, 0 deletions

diff --git a/drivers/dfu/Makefile b/drivers/dfu/Makefile
index def628d..5cc535e 100644
--- a/drivers/dfu/Makefile
+++ b/drivers/dfu/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_DFU_FUNCTION) += dfu.o
 obj-$(CONFIG_DFU_MMC) += dfu_mmc.o
 obj-$(CONFIG_DFU_NAND) += dfu_nand.o
 obj-$(CONFIG_DFU_RAM) += dfu_ram.o
+obj-$(CONFIG_DFU_SF) += dfu_sf.o
diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
index 897dfab..6cd3fbb 100644
--- a/drivers/dfu/dfu.c
+++ b/drivers/dfu/dfu.c
@@ -413,6 +413,9 @@ static int dfu_fill_entity(struct dfu_entity *dfu, char *s, int alt,
 	} else if (strcmp(interface, "ram") == 0) {
 		if (dfu_fill_entity_ram(dfu, devstr, s))
 			return -1;
+	} else if (strcmp(interface, "sf") == 0) {
+		if (dfu_fill_entity_sf(dfu, devstr, s))
+			return -1;
 	} else {
 		printf("%s: Device %s not (yet) supported!\n",
 		       __func__,  interface);
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 <common.h>
+#include <malloc.h>
+#include <errno.h>
+#include <div64.h>
+#include <dfu.h>
+#include <spi_flash.h>
+
+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;
+}