[U-Boot] [PATCH 13/38] spi: sandbox: Add a test driver for sandbox SPI flash
Simon Glass
sjg at chromium.org
Mon Aug 26 15:59:18 UTC 2019
At present SPI-flash testing relies on a sandbox driver which emulates the
SPI bus and implements a flash chip behind that emulated bus.
This provides good coverage but can only implement features supported by
the SPI bus.
Add a new 'direct' SPI flash which is implemented directly by sandbox.
This allows us to write a very simple test of the uclass interface.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
arch/sandbox/dts/test.dts | 4 ++
drivers/mtd/spi/Makefile | 2 +-
drivers/mtd/spi/sandbox_direct.c | 99 ++++++++++++++++++++++++++++++++
test/dm/sf.c | 42 ++++++++++++++
4 files changed, 146 insertions(+), 1 deletion(-)
create mode 100644 drivers/mtd/spi/sandbox_direct.c
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 27b0baab27..208551d7c1 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -619,6 +619,10 @@
};
};
+ spi-flash at 0 {
+ compatible = "sandbox,spi-flash-direct";
+ };
+
syscon0: syscon at 0 {
compatible = "sandbox,syscon0";
reg = <0x10 16>;
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index 5bf5ac828f..7fa03ea614 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -21,4 +21,4 @@ obj-$(CONFIG_SPI_FLASH) += spi-nor.o
obj-$(CONFIG_SPI_FLASH_DATAFLASH) += sf_dataflash.o sf.o
obj-$(CONFIG_SPI_FLASH_INTEL_FAST) += intel_fast_spi.o
obj-$(CONFIG_SPI_FLASH_MTD) += sf_mtd.o
-obj-$(CONFIG_SPI_FLASH_SANDBOX) += sandbox.o
+obj-$(CONFIG_SPI_FLASH_SANDBOX) += sandbox.o sandbox_direct.o
diff --git a/drivers/mtd/spi/sandbox_direct.c b/drivers/mtd/spi/sandbox_direct.c
new file mode 100644
index 0000000000..43d8907710
--- /dev/null
+++ b/drivers/mtd/spi/sandbox_direct.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Simulate a flash chip without an underlying SPI layer. Behaviour is only
+ * useful for testing.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#define LOG_CATEGORY UCLASS_SPI_FLASH
+
+#include <common.h>
+#include <dm.h>
+#include <spi_flash.h>
+
+/**
+ * struct sandbox_direct_priv - private data for this driver
+ *
+ * @read_byte: Byte to return when reading from the driver
+ */
+struct sandbox_direct_priv {
+ char read_byte;
+ int write_prot;
+};
+
+static int sandbox_direct_read(struct udevice *dev, u32 offset, size_t len,
+ void *buf)
+{
+ struct sandbox_direct_priv *priv = dev_get_priv(dev);
+
+ if (offset == 1)
+ return -EIO;
+ memset(buf, priv->read_byte, len);
+
+ return 0;
+}
+
+static int sandbox_direct_write(struct udevice *dev, u32 offset, size_t len,
+ const void *buf)
+{
+ struct sandbox_direct_priv *priv = dev_get_priv(dev);
+
+ if (offset == 1)
+ return -EIO;
+ if (len > 0)
+ priv->read_byte = *(u8 *)buf;
+
+ return 0;
+}
+
+static int sandbox_direct_erase(struct udevice *dev, u32 offset, size_t len)
+{
+ struct sandbox_direct_priv *priv = dev_get_priv(dev);
+
+ if (offset == 1)
+ return -EIO;
+ if (len > 0)
+ priv->read_byte = 'c';
+
+ return 0;
+}
+
+static int sandbox_direct_get_sw_write_prot(struct udevice *dev)
+{
+ struct sandbox_direct_priv *priv = dev_get_priv(dev);
+
+ return priv->write_prot++ ? 1 : 0;
+}
+
+static int sandbox_direct_probe(struct udevice *dev)
+{
+ struct sandbox_direct_priv *priv = dev_get_priv(dev);
+
+ priv->read_byte = 'a';
+
+ return 0;
+}
+
+static struct dm_spi_flash_ops sandbox_direct_ops = {
+ .read = sandbox_direct_read,
+ .write = sandbox_direct_write,
+ .erase = sandbox_direct_erase,
+ .get_sw_write_prot = sandbox_direct_get_sw_write_prot,
+};
+
+static const struct udevice_id sandbox_direct_ids[] = {
+ { .compatible = "sandbox,spi-flash-direct" },
+ { }
+};
+
+U_BOOT_DRIVER(sandbox_sf_direct) = {
+ .name = "sandbox_sf_direct",
+ .id = UCLASS_SPI_FLASH,
+ .of_match = sandbox_direct_ids,
+ .probe = sandbox_direct_probe,
+ .ops = &sandbox_direct_ops,
+ .priv_auto_alloc_size = sizeof(struct sandbox_direct_priv),
+};
diff --git a/test/dm/sf.c b/test/dm/sf.c
index 3788d59052..56277954c2 100644
--- a/test/dm/sf.c
+++ b/test/dm/sf.c
@@ -14,8 +14,13 @@
#include <asm/test.h>
#include <dm/test.h>
#include <dm/util.h>
+#include <dm/uclass.h>
#include <test/ut.h>
+enum {
+ BUF_SIZE = 4,
+};
+
/* Simple test of sandbox SPI flash */
static int dm_test_spi_flash(struct unit_test_state *uts)
{
@@ -91,3 +96,40 @@ static int dm_test_spi_flash_func(struct unit_test_state *uts)
return 0;
}
DM_TEST(dm_test_spi_flash_func, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
+/* Test of the direct SPI flash interface (no SPI layer) */
+static int dm_test_spi_flash_direct(struct unit_test_state *uts)
+{
+ struct udevice *dev;
+ char buf[BUF_SIZE];
+ int i;
+
+ ut_assertok(uclass_get_device(UCLASS_SPI_FLASH, 1, &dev));
+
+ /* Check the read call */
+ ut_asserteq(-EIO, spi_flash_read_dm(dev, 1, BUF_SIZE, buf));
+ ut_assertok(spi_flash_read_dm(dev, 0, BUF_SIZE, buf));
+ for (i = 0; i < BUF_SIZE; i++)
+ ut_asserteq('a', buf[i]);
+
+ /* Check the write call */
+ ut_asserteq(-EIO, spi_flash_write_dm(dev, 1, BUF_SIZE, buf));
+ ut_assertok(spi_flash_write_dm(dev, 0, 1, "b"));
+ ut_assertok(spi_flash_read_dm(dev, 0, BUF_SIZE, buf));
+ for (i = 0; i < BUF_SIZE; i++)
+ ut_asserteq('b', buf[i]);
+
+ /* Check erase */
+ ut_asserteq(-EIO, spi_flash_erase_dm(dev, 1, BUF_SIZE));
+ ut_assertok(spi_flash_erase_dm(dev, 0, 1));
+ ut_assertok(spi_flash_read_dm(dev, 0, BUF_SIZE, buf));
+ for (i = 0; i < BUF_SIZE; i++)
+ ut_asserteq('c', buf[i]);
+
+ /* Check write protection */
+ ut_asserteq(0, spl_flash_get_sw_write_prot(dev));
+ ut_asserteq(1, spl_flash_get_sw_write_prot(dev));
+
+ return 0;
+}
+DM_TEST(dm_test_spi_flash_direct, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
--
2.23.0.187.g17f5b7556c-goog
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