From: Eugen Hristev <eugen.hristev@microchip.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 06/20] W1-EEPROM: add sandbox driver
Date: Thu, 19 Jul 2018 12:57:54 +0300 [thread overview]
Message-ID: <1531994288-19423-7-git-send-email-eugen.hristev@microchip.com> (raw)
In-Reply-To: <1531994288-19423-1-git-send-email-eugen.hristev@microchip.com>
Add a sandbox driver for a one wire EEPROM memory
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
drivers/w1-eeprom/Kconfig | 6 +++++
drivers/w1-eeprom/Makefile | 1 +
drivers/w1-eeprom/eep_sandbox.c | 57 +++++++++++++++++++++++++++++++++++++++++
include/w1.h | 1 +
4 files changed, 65 insertions(+)
create mode 100644 drivers/w1-eeprom/eep_sandbox.c
diff --git a/drivers/w1-eeprom/Kconfig b/drivers/w1-eeprom/Kconfig
index 20ec549..4b7f3c4 100644
--- a/drivers/w1-eeprom/Kconfig
+++ b/drivers/w1-eeprom/Kconfig
@@ -18,6 +18,12 @@ config W1_EEPROM_DS24XXX
help
Maxim DS24 EEPROMs 1-Wire EEPROM support
+config W1_EEPROM_SANDBOX
+ bool "Enable sandbox onewire EEPROM driver"
+ depends on W1
+ help
+ Sandbox driver for a onewire EEPROM memory
+
endif
endmenu
diff --git a/drivers/w1-eeprom/Makefile b/drivers/w1-eeprom/Makefile
index 3f4aa13..03cc4c8 100644
--- a/drivers/w1-eeprom/Makefile
+++ b/drivers/w1-eeprom/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_W1_EEPROM) += w1-eeprom-uclass.o
obj-$(CONFIG_W1_EEPROM_DS24XXX) += ds24xxx.o
+obj-$(CONFIG_W1_EEPROM_SANDBOX) += eep_sandbox.o
diff --git a/drivers/w1-eeprom/eep_sandbox.c b/drivers/w1-eeprom/eep_sandbox.c
new file mode 100644
index 0000000..46910dd
--- /dev/null
+++ b/drivers/w1-eeprom/eep_sandbox.c
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0+
+ *
+ * Copyright (c) 2018 Microchip Technology, Inc.
+ *
+ */
+
+#include <common.h>
+#include <linux/err.h>
+#include <dm.h>
+#include <w1-eeprom.h>
+#include <w1.h>
+
+#define W1_F2D_READ_EEPROM 0xf0
+
+#define EEP_SANDBOX_SAMPLE_MEM "this is a sample EEPROM memory string."
+
+static int eep_sandbox_read_buf(struct udevice *dev, unsigned int offset,
+ u8 *buf, unsigned int count)
+{
+ /* do not allow to copy more than our maximum sample string */
+ if (offset + count < strlen(EEP_SANDBOX_SAMPLE_MEM)) {
+ offset = 0;
+ count = strlen(EEP_SANDBOX_SAMPLE_MEM);
+ }
+ strncpy((char *)buf, EEP_SANDBOX_SAMPLE_MEM, count);
+
+ /*
+ * in case the w1 subsystem uses some different kind of sandbox testing,
+ * like randomized gpio values , we take the buffer from there
+ */
+
+ w1_reset_select(dev);
+
+ w1_write_byte(dev, W1_F2D_READ_EEPROM);
+ w1_write_byte(dev, offset & 0xff);
+ w1_write_byte(dev, offset >> 8);
+
+ w1_read_buf(dev, buf, count);
+
+ /*
+ * even if read buf from w1 fails, return success as we hardcoded
+ * the buffer.
+ */
+ return 0;
+}
+
+static const struct w1_eeprom_ops eep_sandbox_ops = {
+ .read_buf = eep_sandbox_read_buf,
+};
+
+U_BOOT_DRIVER(eep_sandbox) = {
+ .name = "eep_sandbox",
+ .id = UCLASS_W1_EEPROM,
+ .ops = &eep_sandbox_ops,
+};
+
+U_BOOT_W1_DEVICE(eep_sandbox, W1_FAMILY_EEP_SANDBOX);
diff --git a/include/w1.h b/include/w1.h
index 1ca1740..c2ed51c 100644
--- a/include/w1.h
+++ b/include/w1.h
@@ -12,6 +12,7 @@
#define W1_FAMILY_DS24B33 0x23
#define W1_FAMILY_DS2431 0x2d
+#define W1_FAMILY_EEP_SANDBOX 0xfe
/**
* struct w1_driver_entry - Matches a driver to its w1 family
--
2.7.4
next prev parent reply other threads:[~2018-07-19 9:57 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-19 9:57 [U-Boot] [PATCH 00/20] Add support for 1wire protocol and 1wire eeproms Eugen Hristev
2018-07-19 9:57 ` [U-Boot] [PATCH 01/20] w1: Add 1-Wire uclass Eugen Hristev
2018-07-19 9:57 ` [U-Boot] [PATCH 02/20] w1: Add 1-Wire gpio driver Eugen Hristev
2018-07-19 9:57 ` [U-Boot] [PATCH 03/20] dt-bindings: W1: w1-gpio: added bindings for w1-gpio Eugen Hristev
2018-07-19 9:57 ` [U-Boot] [PATCH 04/20] W1-EEPROM: Add an W1-EEPROM uclass for 1 wire EEPROMs Eugen Hristev
2018-07-20 14:28 ` Maxime Ripard
2018-07-30 8:54 ` Eugen Hristev
2018-07-31 2:06 ` Tom Rini
2018-08-02 16:56 ` Simon Glass
2018-07-19 9:57 ` [U-Boot] [PATCH 05/20] W1-EEPROM: add support for Maxim DS24 eeprom families Eugen Hristev
2018-07-19 9:57 ` Eugen Hristev [this message]
2018-07-19 9:57 ` [U-Boot] [PATCH 07/20] w1: add command for onewire protocol Eugen Hristev
2018-07-19 9:57 ` [U-Boot] [PATCH 08/20] pinctrl: sandbox: add gpio onewire w1 group Eugen Hristev
2018-07-19 9:57 ` [U-Boot] [PATCH 09/20] sandbox: DTS: w1: add node for one wire interface on GPIO Eugen Hristev
2018-07-19 9:57 ` [U-Boot] [PATCH 10/20] configs: sandbox: add onewire w1 and sandbox eeprom Eugen Hristev
2018-07-19 9:57 ` [U-Boot] [PATCH 11/20] w1: enumerate sandbox driver if configured Eugen Hristev
2018-07-20 14:01 ` Lukasz Majewski
2018-07-23 23:48 ` Simon Glass
2018-07-24 6:58 ` Maxime Ripard
2018-07-24 15:28 ` Simon Glass
2018-07-25 9:15 ` Maxime Ripard
2018-07-19 9:58 ` [U-Boot] [PATCH 12/20] configs: sama5d2_xplained: add onewire and eeprom drivers Eugen Hristev
2018-07-19 9:58 ` [U-Boot] [PATCH 13/20] configs: sama5d3_xplained: " Eugen Hristev
2018-07-19 9:58 ` [U-Boot] [PATCH 14/20] board: atmel: add support for pda detection Eugen Hristev
2018-07-19 9:58 ` [U-Boot] [PATCH 15/20] board: sama5d2_xplained: add pda detect call at init time Eugen Hristev
2018-07-19 9:58 ` [U-Boot] [PATCH 16/20] board: sama5d3_xplained: " Eugen Hristev
2018-07-19 9:58 ` [U-Boot] [PATCH 17/20] configs: sama5d2_xplained: add fdt overlay support Eugen Hristev
2018-07-19 9:58 ` [U-Boot] [PATCH 18/20] configs: sama5d3_xplained: " Eugen Hristev
2018-07-19 9:58 ` [U-Boot] [PATCH 19/20] ARM: dts: at91: sama5d2_xplained: add onewire connector for LCD eeprom Eugen Hristev
2018-07-19 9:58 ` [U-Boot] [PATCH 20/20] ARM: dts: at91: sama5d3_xplained: " Eugen Hristev
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