dfu: add SF backend

This allows SPI Flash to be programmed using DFU.

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

diff --git a/drivers/dfu/Makefile b/drivers/dfu/Makefile
index def628d..5cc535e 100644 (file)
--- 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 (file)
--- 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 (file)
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;
+}

diff --git a/include/dfu.h b/include/dfu.h
index 43814b3..7e0a999 100644 (file)
--- a/include/dfu.h
+++ b/include/dfu.h
@@ -14,6 +14,7 @@
 #include <common.h>
 #include <linux/list.h>
 #include <mmc.h>
+#include <spi_flash.h>
 #include <linux/usb/composite.h>
 
 enum dfu_device_type {
@@ -21,6 +22,7 @@ enum dfu_device_type {
        DFU_DEV_ONENAND,
        DFU_DEV_NAND,
        DFU_DEV_RAM,
+       DFU_DEV_SF,
 };
 
 enum dfu_layout {
@@ -70,6 +72,14 @@ struct ram_internal_data {
        unsigned int    size;
 };
 
+struct sf_internal_data {
+       struct spi_flash *dev;
+
+       /* RAW programming */
+       u64 start;
+       u64 size;
+};
+
 #define DFU_NAME_SIZE                  32
 #define DFU_CMD_BUF_SIZE               128
 #ifndef CONFIG_SYS_DFU_DATA_BUF_SIZE
@@ -97,6 +107,7 @@ struct dfu_entity {
                struct mmc_internal_data mmc;
                struct nand_internal_data nand;
                struct ram_internal_data ram;
+               struct sf_internal_data sf;
        } data;
 
        long (*get_medium_size)(struct dfu_entity *dfu);
@@ -182,5 +193,16 @@ static inline int dfu_fill_entity_ram(struct dfu_entity *dfu, char *devstr,
 }
 #endif
 
+#ifdef CONFIG_DFU_SF
+extern int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr, char *s);
+#else
+static inline int dfu_fill_entity_sf(struct dfu_entity *dfu, char *devstr,
+                                    char *s)
+{
+       puts("SF support not available!\n");
+       return -1;
+}
+#endif
+
 int dfu_add(struct usb_configuration *c);
 #endif /* __DFU_ENTITY_H_ */