Add support for a driver which sets up DRAM and can return information about
the amount of RAM available. This is a first step towards moving RAM init
to driver model.
Signed-off-by: Simon Glass <s...@chromium.org>
---
Changes in v3: None
Changes in v2: None
drivers/Kconfig | 2 ++
drivers/Makefile | 1 +
drivers/ram/Kconfig | 18 ++++++++++++++++++
drivers/ram/Makefile | 7 +++++++
drivers/ram/ram-uclass.c | 28 ++++++++++++++++++++++++++++
include/dm/uclass-id.h | 1 +
include/ram.h | 38 ++++++++++++++++++++++++++++++++++++++
scripts/Makefile.spl | 1 +
8 files changed, 96 insertions(+)
create mode 100644 drivers/ram/Kconfig
create mode 100644 drivers/ram/Makefile
create mode 100644 drivers/ram/ram-uclass.c
create mode 100644 include/ram.h
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 17a61e4..7c9eefc 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -36,6 +36,8 @@ source "drivers/pinctrl/Kconfig"
source "drivers/power/Kconfig"
+source "drivers/ram/Kconfig"
+
source "drivers/hwmon/Kconfig"
source "drivers/watchdog/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index b68c4ee..39b7919 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -12,6 +12,7 @@ obj-y += misc/
obj-y += pcmcia/
obj-y += dfu/
obj-$(CONFIG_PINCTRL) += pinctrl/
+obj-$(CONFIG_RAM) += ram/
obj-y += rtc/
obj-y += sound/
obj-y += tpm/
diff --git a/drivers/ram/Kconfig b/drivers/ram/Kconfig
new file mode 100644
index 0000000..642a2d8
--- /dev/null
+++ b/drivers/ram/Kconfig
@@ -0,0 +1,18 @@
+config RAM
+ bool "Enable RAM drivers using Driver Model"
+ depends on DM
+ help
+ This allows drivers to be provided for SDRAM and other RAM
+ controllers and their type to be specified in the board's device
+ tree. Generally some parameters are required to set up the RAM and
+ the RAM size can either be statically defined or dynamically
+ detected.
+
+config SPL_RAM_SUPPORT
+ bool "Enable RAM support in SPL"
+ depends on RAM
+ help
+ The RAM subsystem adds a small amount of overhead to the image.
+ If this is acceptable and you have a need to use RAM drivers in
+ SPL, enable this option. It might provide a cleaner interface to
+ setting up RAM (e.g. SDRAM / DDR) within SPL.
diff --git a/drivers/ram/Makefile b/drivers/ram/Makefile
new file mode 100644
index 0000000..4494d81
--- /dev/null
+++ b/drivers/ram/Makefile
@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2015 Google, Inc
+# Wolfgang Denk, DENX Software Engineering, w...@denx.de.
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+obj-$(CONFIG_RAM) += ram-uclass.o
diff --git a/drivers/ram/ram-uclass.c b/drivers/ram/ram-uclass.c
new file mode 100644
index 0000000..2f1fbe7
--- /dev/null
+++ b/drivers/ram/ram-uclass.c
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <s...@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <ram.h>
+#include <dm.h>
+#include <errno.h>
+#include <dm/lists.h>
+#include <dm/root.h>
+
+int ram_get_info(struct udevice *dev, struct ram_info *info)
+{
+ struct ram_ops *ops = ram_get_ops(dev);
+
+ if (!ops->get_info)
+ return -ENOSYS;
+
+ return ops->get_info(dev, info);
+}
+
+UCLASS_DRIVER(ram) = {
+ .id = UCLASS_RAM,
+ .name = "ram",
+};
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index 14a1614..5bb602f 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -28,6 +28,7 @@ enum uclass_id {
UCLASS_CPU, /* CPU, typically part of an SoC */
UCLASS_CROS_EC, /* Chrome OS EC */
UCLASS_DISPLAY_PORT, /* Display port video */
+ UCLASS_RAM, /* RAM controller */
UCLASS_ETH, /* Ethernet device */
UCLASS_GPIO, /* Bank of general-purpose I/O pins */
UCLASS_I2C, /* I2C bus */
diff --git a/include/ram.h b/include/ram.h
new file mode 100644
index 0000000..e2172a8
--- /dev/null
+++ b/include/ram.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <s...@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __RAM_H
+#define __RAM_H
+
+struct ram_info {
+ phys_addr_t base;
+ size_t size;
+};
+
+struct ram_ops {
+ /**
+ * get_info() - Get basic memory info
+ *
+ * @dev: Device to check (UCLASS_RAM)
+ * @info: Place to put info
+ * @return 0 if OK, -ve on error
+ */
+ int (*get_info)(struct udevice *dev, struct ram_info *info);
+};
+
+#define ram_get_ops(dev) ((struct ram_ops *)(dev)->driver->ops)
+
+/**
+ * ram_get_info() - Get information about a RAM device
+ *
+ * @dev: Device to check (UCLASS_RAM)
+ * @info: Returns RAM info
+ * @return 0 if OK, -ve on error
+ */
+int ram_get_info(struct udevice *dev, struct ram_info *info);
+
+#endif
diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl
index 1e58be9..c4e83bb 100644
--- a/scripts/Makefile.spl
+++ b/scripts/Makefile.spl
@@ -79,6 +79,7 @@ libs-$(CONFIG_SPL_ETH_SUPPORT) += drivers/net/
libs-$(CONFIG_SPL_ETH_SUPPORT) += drivers/net/phy/
libs-$(CONFIG_SPL_USBETH_SUPPORT) += drivers/net/phy/
libs-$(CONFIG_SPL_PINCTRL_SUPPORT) += drivers/pinctrl/
+libs-$(CONFIG_SPL_RAM_SUPPORT) += drivers/ram/
libs-$(CONFIG_SPL_MUSB_NEW_SUPPORT) += drivers/usb/musb-new/
libs-$(CONFIG_SPL_USBETH_SUPPORT) += drivers/usb/gadget/
libs-$(CONFIG_SPL_WATCHDOG_SUPPORT) += drivers/watchdog/
--
2.4.3.573.g4eafbef
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