sunxi: rework target

 - update kernel to 3.12
 - add patches for clocks, i2c, usb, sid, rtc
 - support common image for A10/A13/A20
 - add support for a couple boards
 - most drivers are configured into the kernel as of now

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38811 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 290 insertions, 0 deletions

diff --git a/target/linux/sunxi/patches-3.12/170-sunxi-sid-initial.patch b/target/linux/sunxi/patches-3.12/170-sunxi-sid-initial.patch
new file mode 100644
index 0000000000..8407b2f998
--- /dev/null
+++ b/target/linux/sunxi/patches-3.12/170-sunxi-sid-initial.patch
@@ -0,0 +1,290 @@
+From 1d4b3ab562fa87e2c7f05cf92af1ff4b6cd42581 Mon Sep 17 00:00:00 2001
+From: Oliver Schinagl <oliver@schinagl.nl>
+Date: Tue, 3 Sep 2013 12:33:27 +0200
+Subject: [PATCH] ARM: sunxi: Initial support for Allwinner's Security ID fuses
+
+Allwinner has electric fuses (efuse) on their line of chips. This driver
+reads those fuses, seeds the kernel entropy and exports them as a sysfs
+node.
+
+These fuses are most likely to be programmed at the factory, encoding
+things like Chip ID, some sort of serial number, etc. and appear to be
+reasonably unique.
+While in theory, these should be writeable by the user, it will probably
+be inconvenient to do so. Allwinner recommends that a certain input pin,
+labeled 'efuse_vddq', be connected to GND. To write these fuses however,
+a 2.5 V programming voltage needs to be applied to this pin.
+
+Even so, they can still be used to generate a board-unique mac from,
+board unique RSA key and seed the kernel RNG.
+
+On sun7i additional storage is available, this is initially used for an
+UEFI BOOT key, Secure JTAG key, HDMI-HDCP key and vendor specific keys.
+
+Currently supported are the following known chips:
+Allwinner sun4i (A10)
+Allwinner sun5i (A10s, A13)
+Allwinner sun7i (A20)
+
+Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
+---
+ Documentation/ABI/testing/sysfs-driver-sunxi-sid   |  22 +++
+ .../bindings/misc/allwinner,sunxi-sid.txt          |  17 +++
+ drivers/misc/eeprom/Kconfig                        |  13 ++
+ drivers/misc/eeprom/Makefile                       |   1 +
+ drivers/misc/eeprom/sunxi_sid.c                    | 158 +++++++++++++++++++++
+ 5 files changed, 211 insertions(+)
+ create mode 100644 Documentation/ABI/testing/sysfs-driver-sunxi-sid
+ create mode 100644 Documentation/devicetree/bindings/misc/allwinner,sunxi-sid.txt
+ create mode 100644 drivers/misc/eeprom/sunxi_sid.c
+
+diff --git a/Documentation/ABI/testing/sysfs-driver-sunxi-sid b/Documentation/ABI/testing/sysfs-driver-sunxi-sid
+new file mode 100644
+index 0000000..ffb9536
+--- /dev/null
++++ b/Documentation/ABI/testing/sysfs-driver-sunxi-sid
+@@ -0,0 +1,22 @@
++What:		/sys/devices/*/<our-device>/eeprom
++Date:		August 2013
++Contact:	Oliver Schinagl <oliver@schinagl.nl>
++Description:	read-only access to the SID (Security-ID) on current
++		A-series SoC's from Allwinner. Currently supports A10, A10s, A13
++		and A20 CPU's. The earlier A1x series of SoCs exports 16 bytes,
++		whereas the newer A20 SoC exposes 512 bytes split into sections.
++		Besides the 16 bytes of SID, there's also an SJTAG area,
++		HDMI-HDCP key and some custom keys. Below a quick overview, for
++		details see the user manual:
++		0x000  128 bit root-key (sun[457]i)
++		0x010  128 bit boot-key (sun7i)
++		0x020   64 bit security-jtag-key (sun7i)
++		0x028   16 bit key configuration (sun7i)
++		0x02b   16 bit custom-vendor-key (sun7i)
++		0x02c  320 bit low general key (sun7i)
++		0x040   32 bit read-control access (sun7i)
++		0x064  224 bit low general key (sun7i)
++		0x080 2304 bit HDCP-key (sun7i)
++		0x1a0  768 bit high general key (sun7i)
++Users:		any user space application which wants to read the SID on
++		Allwinner's A-series of CPU's.
+diff --git a/Documentation/devicetree/bindings/misc/allwinner,sunxi-sid.txt b/Documentation/devicetree/bindings/misc/allwinner,sunxi-sid.txt
+new file mode 100644
+index 0000000..68ba372
+--- /dev/null
++++ b/Documentation/devicetree/bindings/misc/allwinner,sunxi-sid.txt
+@@ -0,0 +1,17 @@
++Allwinner sunxi-sid
++
++Required properties:
++- compatible: "allwinner,sun4i-sid" or "allwinner,sun7i-a20-sid".
++- reg: Should contain registers location and length
++
++Example for sun4i:
++	sid@01c23800 {
++		compatible = "allwinner,sun4i-sid";
++		reg = <0x01c23800 0x10>
++	};
++
++Example for sun7i:
++	sid@01c23800 {
++		compatible = "allwinner,sun7i-a20-sid";
++		reg = <0x01c23800 0x200>
++	};
+diff --git a/drivers/misc/eeprom/Kconfig b/drivers/misc/eeprom/Kconfig
+index 04f2e1f..9536852f 100644
+--- a/drivers/misc/eeprom/Kconfig
++++ b/drivers/misc/eeprom/Kconfig
+@@ -96,4 +96,17 @@ config EEPROM_DIGSY_MTC_CFG
+ 
+ 	  If unsure, say N.
+ 
++config EEPROM_SUNXI_SID
++	tristate "Allwinner sunxi security ID support"
++	depends on ARCH_SUNXI && SYSFS
++	help
++	  This is a driver for the 'security ID' available on various Allwinner
++	  devices.
++
++	  Due to the potential risks involved with changing e-fuses,
++	  this driver is read-only.
++
++	  This driver can also be built as a module. If so, the module
++	  will be called sunxi_sid.
++
+ endmenu
+diff --git a/drivers/misc/eeprom/Makefile b/drivers/misc/eeprom/Makefile
+index fc1e81d..9507aec 100644
+--- a/drivers/misc/eeprom/Makefile
++++ b/drivers/misc/eeprom/Makefile
+@@ -4,4 +4,5 @@ obj-$(CONFIG_EEPROM_LEGACY)	+= eeprom.o
+ obj-$(CONFIG_EEPROM_MAX6875)	+= max6875.o
+ obj-$(CONFIG_EEPROM_93CX6)	+= eeprom_93cx6.o
+ obj-$(CONFIG_EEPROM_93XX46)	+= eeprom_93xx46.o
++obj-$(CONFIG_EEPROM_SUNXI_SID)	+= sunxi_sid.o
+ obj-$(CONFIG_EEPROM_DIGSY_MTC_CFG) += digsy_mtc_eeprom.o
+diff --git a/drivers/misc/eeprom/sunxi_sid.c b/drivers/misc/eeprom/sunxi_sid.c
+new file mode 100644
+index 0000000..9c34e57
+--- /dev/null
++++ b/drivers/misc/eeprom/sunxi_sid.c
+@@ -0,0 +1,158 @@
++/*
++ * Copyright (c) 2013 Oliver Schinagl <oliver@schinagl.nl>
++ * http://www.linux-sunxi.org
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ * This driver exposes the Allwinner security ID, efuses exported in byte-
++ * sized chunks.
++ */
++
++#include <linux/compiler.h>
++#include <linux/device.h>
++#include <linux/err.h>
++#include <linux/export.h>
++#include <linux/fs.h>
++#include <linux/init.h>
++#include <linux/io.h>
++#include <linux/kernel.h>
++#include <linux/kobject.h>
++#include <linux/module.h>
++#include <linux/of_device.h>
++#include <linux/platform_device.h>
++#include <linux/random.h>
++#include <linux/slab.h>
++#include <linux/stat.h>
++#include <linux/sysfs.h>
++#include <linux/types.h>
++
++#define DRV_NAME "sunxi-sid"
++
++struct sunxi_sid_data {
++	void __iomem *reg_base;
++	unsigned int keysize;
++};
++
++/* We read the entire key, due to a 32 bit read alignment requirement. Since we
++ * want to return the requested byte, this results in somewhat slower code and
++ * uses 4 times more reads as needed but keeps code simpler. Since the SID is
++ * only very rarely probed, this is not really an issue.
++ */
++static u8 sunxi_sid_read_byte(const struct sunxi_sid_data *sid_data,
++			      const unsigned int offset)
++{
++	u32 sid_key;
++
++	if (offset >= sid_data->keysize)
++		return 0;
++
++	sid_key = ioread32be(sid_data->reg_base + round_down(offset, 4));
++	sid_key >>= (offset % 4) * 8;
++
++	return sid_key; /* Only return the last byte */
++}
++
++static ssize_t sid_read(struct file *fd, struct kobject *kobj,
++			struct bin_attribute *attr, char *buf,
++			loff_t pos, size_t size)
++{
++	struct platform_device *pdev;
++	struct sunxi_sid_data *sid_data;
++	int i;
++
++	pdev = to_platform_device(kobj_to_dev(kobj));
++	sid_data = platform_get_drvdata(pdev);
++
++	if (pos < 0 || pos >= sid_data->keysize)
++		return 0;
++	if (size > sid_data->keysize - pos)
++		size = sid_data->keysize - pos;
++
++	for (i = 0; i < size; i++)
++		buf[i] = sunxi_sid_read_byte(sid_data, pos + i);
++
++	return i;
++}
++
++static struct bin_attribute sid_bin_attr = {
++	.attr = { .name = "eeprom", .mode = S_IRUGO, },
++	.read = sid_read,
++};
++
++static int sunxi_sid_remove(struct platform_device *pdev)
++{
++	device_remove_bin_file(&pdev->dev, &sid_bin_attr);
++	dev_dbg(&pdev->dev, "driver unloaded\n");
++
++	return 0;
++}
++
++static const struct of_device_id sunxi_sid_of_match[] = {
++	{ .compatible = "allwinner,sun4i-sid", .data = (void *)16},
++	{ .compatible = "allwinner,sun7i-a20-sid", .data = (void *)512},
++	{/* sentinel */},
++};
++MODULE_DEVICE_TABLE(of, sunxi_sid_of_match);
++
++static int sunxi_sid_probe(struct platform_device *pdev)
++{
++	struct sunxi_sid_data *sid_data;
++	struct resource *res;
++	const struct of_device_id *of_dev_id;
++	u8 *entropy;
++	unsigned int i;
++
++	sid_data = devm_kzalloc(&pdev->dev, sizeof(struct sunxi_sid_data),
++				GFP_KERNEL);
++	if (!sid_data)
++		return -ENOMEM;
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	sid_data->reg_base = devm_ioremap_resource(&pdev->dev, res);
++	if (IS_ERR(sid_data->reg_base))
++		return PTR_ERR(sid_data->reg_base);
++
++	of_dev_id = of_match_device(sunxi_sid_of_match, &pdev->dev);
++	if (!of_dev_id)
++		return -ENODEV;
++	sid_data->keysize = (int)of_dev_id->data;
++
++	platform_set_drvdata(pdev, sid_data);
++
++	sid_bin_attr.size = sid_data->keysize;
++	if (device_create_bin_file(&pdev->dev, &sid_bin_attr))
++		return -ENODEV;
++
++	entropy = kzalloc(sizeof(u8) * sid_data->keysize, GFP_KERNEL);
++	for (i = 0; i < sid_data->keysize; i++)
++		entropy[i] = sunxi_sid_read_byte(sid_data, i);
++	add_device_randomness(entropy, sid_data->keysize);
++	kfree(entropy);
++
++	dev_dbg(&pdev->dev, "loaded\n");
++
++	return 0;
++}
++
++static struct platform_driver sunxi_sid_driver = {
++	.probe = sunxi_sid_probe,
++	.remove = sunxi_sid_remove,
++	.driver = {
++		.name = DRV_NAME,
++		.owner = THIS_MODULE,
++		.of_match_table = sunxi_sid_of_match,
++	},
++};
++module_platform_driver(sunxi_sid_driver);
++
++MODULE_AUTHOR("Oliver Schinagl <oliver@schinagl.nl>");
++MODULE_DESCRIPTION("Allwinner sunxi security id driver");
++MODULE_LICENSE("GPL");
+-- 
+1.8.4
+