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Message-Id: <1311088581-17337-2-git-send-email-vivien.didelot@savoirfairelinux.com>
Date: Tue, 19 Jul 2011 11:16:17 -0400
From: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To: rafael.carre@...oirfairelinux.com, linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] x86: base support for TS-5500 Single Board Computer
Add base support for TS-5500 in arch/x86/platform/ts5500 and documentation in
Documentation/ABI/testing/sysfs-platform-ts5500.
Signed-off-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
---
Documentation/ABI/testing/sysfs-platform-ts5500 | 46 ++++
MAINTAINERS | 7 +
arch/x86/Kconfig | 2 +
arch/x86/platform/Makefile | 1 +
arch/x86/platform/ts5500/Kconfig | 7 +
arch/x86/platform/ts5500/Makefile | 1 +
arch/x86/platform/ts5500/ts5500.c | 296 +++++++++++++++++++++++
7 files changed, 360 insertions(+), 0 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-platform-ts5500
create mode 100644 arch/x86/platform/ts5500/Kconfig
create mode 100644 arch/x86/platform/ts5500/Makefile
create mode 100644 arch/x86/platform/ts5500/ts5500.c
diff --git a/Documentation/ABI/testing/sysfs-platform-ts5500 b/Documentation/ABI/testing/sysfs-platform-ts5500
new file mode 100644
index 0000000..c870564
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-platform-ts5500
@@ -0,0 +1,46 @@
+What: /sys/devices/platform/ts5500/id
+Date: July 2011
+KernelVersion: 2.6.39
+Contact: "Savoir-faire Linux, Inc." <kernel-ts@...oirfairelinux.com>
+Description:
+ Product ID of the TS board. TS-5500 ID is 0x60.
+
+What: /sys/devices/platform/ts5500/sram
+Date: July 2011
+KernelVersion: 2.6.39
+Contact: "Savoir-faire Linux, Inc." <kernel-ts@...oirfairelinux.com>
+Description:
+ Say if the SRAM feature is present. If it is enabled, it will
+ display "1", otherwise "0".
+
+What: /sys/devices/platform/ts5500/ereset
+Date: July 2011
+KernelVersion: 2.6.39
+Contact: "Savoir-faire Linux, Inc." <kernel-ts@...oirfairelinux.com>
+Description:
+ Say if an external reset is present. If it is present, it will
+ display "1", otherwise "0".
+
+What: /sys/devices/platform/ts5500/jp{1,2,3,4,5,6}
+Date: July 2011
+KernelVersion: 2.6.39
+Contact: "Savoir-faire Linux, Inc." <kernel-ts@...oirfairelinux.com>
+Description:
+ Show the state of a plugged jumper. If it is present, it will
+ display "1", otherwise "0".
+
+What: /sys/devices/platform/ts5500/adc
+Date: July 2011
+KernelVersion: 2.6.39
+Contact: "Savoir-faire Linux, Inc." <kernel-ts@...oirfairelinux.com>
+Description:
+ Say if the Analogic to Digital Converter is present. If it is
+ enabled, it will display "1", otherwise "0".
+
+What: /sys/devices/platform/ts5500/rs485
+Date: July 2011
+KernelVersion: 2.6.39
+Contact: "Savoir-faire Linux, Inc." <kernel-ts@...oirfairelinux.com>
+Description:
+ Say if the RS485 feature is present. If it is enabled, it
+ will display "1", otherwise "0".
\ No newline at end of file
diff --git a/MAINTAINERS b/MAINTAINERS
index 187282d..be8ce4b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6134,6 +6134,13 @@ W: http://tcp-lp-mod.sourceforge.net/
S: Maintained
F: net/ipv4/tcp_lp.c
+TECHNOLOGIC SYSTEMS TS5500 MACHINE SUPPORT
+M: Savoir-faire Linux Inc. <ts-kernel@...oirfairelinux.com>
+S: Maintained
+F: arch/x86/platform/ts5500/Kconfig
+F: arch/x86/platform/ts5500/Makefile
+F: arch/x86/platform/ts5500/ts5500.c
+
TEGRA SUPPORT
M: Colin Cross <ccross@...roid.com>
M: Erik Gilling <konkers@...roid.com>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index da34972..cd4bf1a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2079,6 +2079,8 @@ config OLPC_XO1
---help---
Add support for non-essential features of the OLPC XO-1 laptop.
+source "arch/x86/platform/ts5500/Kconfig"
+
endif # X86_32
config AMD_NB
diff --git a/arch/x86/platform/Makefile b/arch/x86/platform/Makefile
index 021eee9..1bdc038 100644
--- a/arch/x86/platform/Makefile
+++ b/arch/x86/platform/Makefile
@@ -8,3 +8,4 @@ obj-y += scx200/
obj-y += sfi/
obj-y += visws/
obj-y += uv/
+obj-y += ts5500/
diff --git a/arch/x86/platform/ts5500/Kconfig b/arch/x86/platform/ts5500/Kconfig
new file mode 100644
index 0000000..6428ca5
--- /dev/null
+++ b/arch/x86/platform/ts5500/Kconfig
@@ -0,0 +1,7 @@
+config TS5500
+ bool "Technologic Systems TS-5500 Single Board Computer support"
+ depends on MELAN
+ help
+ Add support for the Technologic Systems TS-5500 platform features.
+
+ If you have a TS-5500, say Y here.
diff --git a/arch/x86/platform/ts5500/Makefile b/arch/x86/platform/ts5500/Makefile
new file mode 100644
index 0000000..0a689a7
--- /dev/null
+++ b/arch/x86/platform/ts5500/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_TS5500) += ts5500.o
diff --git a/arch/x86/platform/ts5500/ts5500.c b/arch/x86/platform/ts5500/ts5500.c
new file mode 100644
index 0000000..0135dbd
--- /dev/null
+++ b/arch/x86/platform/ts5500/ts5500.c
@@ -0,0 +1,296 @@
+/*
+ * Technologic Systems TS-5500 board - SBC info layer
+ *
+ * Copyright (c) 2010-2011 Savoir-faire Linux Inc.
+ * Alexandre Savard <alexandre.savard@...oirfairelinux.com>
+ * Jonas Fonseca <jonas.fonseca@...oirfairelinux.com>
+ * Vivien Didelot <vivien.didelot@...oirfairelinux.com>
+ *
+ * Portions originate from ts_sbcinfo.c (c) Technologic Systems
+ * Liberty Young <liberty@...eddedx86.com>
+ *
+ * These functions add sysfs platform entries to display information about
+ * the Technologic Systems TS-5500 Single Board Computer (SBC).
+ *
+ * For further information about sysfs entries, see
+ * Documentation/ABI/testing/sysfs-platform-ts5500
+ */
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <asm/processor.h>
+
+/* Hardware info for pre-detection */
+#define AMD_ELAN_FAMILY 4
+#define AMD_ELAN_SC520 9
+
+/* Product code register */
+#define TS5500_PRODUCT_CODE_REG 0x74
+#define TS5500_PRODUCT_CODE 0x60 /* TS-5500 product code */
+
+/* SRAM/RS-485/ADC options, and RS-485 RTS/Automatic RS-485 flags register */
+#define TS5500_SRAM_RS485_ADC_REG 0x75
+#define TS5500_SRAM_OPT 0x01 /* SRAM option */
+#define TS5500_RS485_OPT 0x02 /* RS-485 option */
+#define TS5500_ADC_OPT 0x04 /* A/D converter option */
+#define TS5500_RS485_RTS_FLAG 0x40 /* RTS for RS-485 */
+#define TS5500_RS485_AUTO_FLAG 0x80 /* Automatic RS-485 */
+
+/* External Reset/Industrial Temperature Range options register */
+#define TS5500_ERESET_ITR_REG 0x76
+#define TS5500_ERESET_OPT 0x01 /* External Reset option */
+#define TS5500_ITR_OPT 0x02 /* Indust. Temp. Range option */
+
+/* LED/Jumpers register */
+#define TS5500_LED_JMPRS_REG 0x77
+#define TS5500_LED_FLAG 0x01 /* LED flag */
+#define TS5500_JP1 0x02 /* Automatic CMOS */
+#define TS5500_JP2 0x04 /* Enable Serial Console */
+#define TS5500_JP3 0x08 /* Write Enable Drive A */
+#define TS5500_JP4 0x10 /* Fast Console (115K baud) */
+#define TS5500_JP5 0x20 /* User Jumper */
+#define TS5500_JP6 0x40 /* Console on COM1 (req. JP2) */
+#define TS5500_JP7 0x80 /* Undocumented (Unused) */
+
+/**
+ * struct ts5500_sbc - TS-5500 SBC main structure
+ * @lock: Read/Write mutex.
+ * @board_id: Board name.
+ * @sram: Check SRAM option.
+ * @rs485: Check RS-485 option.
+ * @adc: Check Analogic/Digital converter option.
+ * @ereset: Check External Reset option.
+ * @itr: Check Industrial Temperature Range option.
+ * @jumpers: States of jumpers 1-7.
+ */
+struct ts5500_sbc {
+ struct mutex lock;
+ int board_id;
+ bool sram;
+ bool rs485;
+ bool adc;
+ bool ereset;
+ bool itr;
+ u8 jumpers;
+};
+
+/* Current platform */
+struct ts5500_sbc *ts5500;
+
+/**
+ * ts5500_pre_detect() - check for TS-5500 specific features
+ *
+ * It is not safe to read ID register if we are not sure that it's a TS SBC.
+ * Since TS SBCs don't have DMI support, it is safer to check for a TS-5500
+ * specific feature such as the processor.
+ */
+static int ts5500_pre_detect(void)
+{
+ /* Check for AMD ElanSC520 Microcontroller */
+ if (!(cpu_info.x86_vendor == X86_VENDOR_AMD &&
+ cpu_info.x86 == AMD_ELAN_FAMILY &&
+ cpu_info.x86_model == AMD_ELAN_SC520))
+ return -ENODEV;
+
+ return 0;
+}
+
+/**
+ * ts5500_detect_config() - detect the TS board
+ * @sbc: Structure where to store the detected board's details.
+ */
+static int ts5500_detect_config(struct ts5500_sbc *sbc)
+{
+ u8 tmp;
+ int ret = 0;
+
+ if (!request_region(TS5500_PRODUCT_CODE_REG, 4, "ts5500"))
+ return -EBUSY;
+
+ mutex_lock(&ts5500->lock);
+ tmp = inb(TS5500_PRODUCT_CODE_REG);
+ if (tmp != TS5500_PRODUCT_CODE) {
+ pr_err("This platform is not a TS-5500 (found ID 0x%x)\n", tmp);
+ ret = -ENODEV;
+ goto error;
+ }
+ sbc->board_id = tmp;
+
+ tmp = inb(TS5500_SRAM_RS485_ADC_REG);
+ ts5500->sram = !!(tmp & TS5500_SRAM_OPT);
+ ts5500->rs485 = !!(tmp & TS5500_RS485_OPT);
+ ts5500->adc = !!(tmp & TS5500_ADC_OPT);
+
+ tmp = inb(TS5500_ERESET_ITR_REG);
+ ts5500->ereset = !!(tmp & TS5500_ERESET_OPT);
+ ts5500->itr = !!(tmp & TS5500_ITR_OPT);
+
+ tmp = inb(TS5500_LED_JMPRS_REG);
+ sbc->jumpers = tmp & 0xFE; /* All bits except the first (LED) */
+
+error:
+ mutex_unlock(&ts5500->lock);
+ release_region(TS5500_PRODUCT_CODE_REG, 4);
+ return ret;
+}
+
+#define TS5500_IS_JP_SET(sbc, jmp) (!!(sbc->jumpers & TS5500_JP##jmp))
+
+static struct platform_device *ts5500_devices[] __initdata = {
+};
+
+static ssize_t ts5500_show_id(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ts5500_sbc *sbc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "0x%x\n", sbc->board_id);
+}
+
+static ssize_t ts5500_show_sram(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ts5500_sbc *sbc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", sbc->sram);
+}
+
+static ssize_t ts5500_show_rs485(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ts5500_sbc *sbc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", sbc->rs485);
+}
+
+static ssize_t ts5500_show_adc(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ts5500_sbc *sbc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", sbc->adc);
+}
+
+static ssize_t ts5500_show_ereset(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ts5500_sbc *sbc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", sbc->ereset);
+}
+
+static ssize_t ts5500_show_itr(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ts5500_sbc *sbc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", sbc->itr);
+}
+
+#define TS5500_SHOW_JP(jp) \
+ static ssize_t ts5500_show_jp##jp(struct device *dev, \
+ struct device_attribute *attr,\
+ char *buf) \
+ { \
+ struct ts5500_sbc *sbc = dev_get_drvdata(dev); \
+ return sprintf(buf, "%d\n", TS5500_IS_JP_SET(sbc, jp)); \
+ }
+
+TS5500_SHOW_JP(1)
+TS5500_SHOW_JP(2)
+TS5500_SHOW_JP(3)
+TS5500_SHOW_JP(4)
+TS5500_SHOW_JP(5)
+TS5500_SHOW_JP(6)
+
+static DEVICE_ATTR(id, S_IRUGO, ts5500_show_id, NULL);
+static DEVICE_ATTR(sram, S_IRUGO, ts5500_show_sram, NULL);
+static DEVICE_ATTR(rs485, S_IRUGO, ts5500_show_rs485, NULL);
+static DEVICE_ATTR(adc, S_IRUGO, ts5500_show_adc, NULL);
+static DEVICE_ATTR(ereset, S_IRUGO, ts5500_show_ereset, NULL);
+static DEVICE_ATTR(itr, S_IRUGO, ts5500_show_itr, NULL);
+static DEVICE_ATTR(jp1, S_IRUGO, ts5500_show_jp1, NULL);
+static DEVICE_ATTR(jp2, S_IRUGO, ts5500_show_jp2, NULL);
+static DEVICE_ATTR(jp3, S_IRUGO, ts5500_show_jp3, NULL);
+static DEVICE_ATTR(jp4, S_IRUGO, ts5500_show_jp4, NULL);
+static DEVICE_ATTR(jp5, S_IRUGO, ts5500_show_jp5, NULL);
+static DEVICE_ATTR(jp6, S_IRUGO, ts5500_show_jp6, NULL);
+
+static struct attribute *ts5500_attributes[] = {
+ &dev_attr_id.attr,
+ &dev_attr_sram.attr,
+ &dev_attr_rs485.attr,
+ &dev_attr_adc.attr,
+ &dev_attr_ereset.attr,
+ &dev_attr_itr.attr,
+ &dev_attr_jp1.attr,
+ &dev_attr_jp2.attr,
+ &dev_attr_jp3.attr,
+ &dev_attr_jp4.attr,
+ &dev_attr_jp5.attr,
+ &dev_attr_jp6.attr,
+ NULL
+};
+
+static const struct attribute_group ts5500_attr_group = {
+ .attrs = ts5500_attributes
+};
+
+static int __init ts5500_init(void)
+{
+ int ret;
+ struct platform_device *pdev;
+
+ /* Firstly, check specific TS-5500 hardware, such as CPU. */
+ ret = ts5500_pre_detect();
+ if (ret)
+ return ret;
+
+ ts5500 = kzalloc(sizeof(struct ts5500_sbc), GFP_KERNEL);
+ if (!ts5500)
+ return -ENOMEM;
+ mutex_init(&ts5500->lock);
+
+ ret = ts5500_detect_config(ts5500);
+ if (ret)
+ goto release_mem;
+
+ pdev = platform_device_register_simple("ts5500", -1, NULL, 0);
+ if (IS_ERR(pdev)) {
+ ret = PTR_ERR(pdev);
+ goto release_mem;
+ }
+ platform_set_drvdata(pdev, ts5500);
+
+ ret = platform_add_devices(ts5500_devices, ARRAY_SIZE(ts5500_devices));
+ if (ret)
+ goto release_pdev;
+
+ ret = sysfs_create_group(&pdev->dev.kobj,
+ &ts5500_attr_group);
+ if (ret)
+ goto release_pdev;
+
+ return 0;
+
+release_pdev:
+ platform_device_unregister(pdev);
+release_mem:
+ kfree(ts5500);
+
+ return ret;
+}
+postcore_initcall(ts5500_init);
+
+MODULE_AUTHOR("Jonas Fonseca <jonas.fonseca@...oirfairelinux.com>");
+MODULE_AUTHOR("Alexandre Savard <alexandre.savard@...oirfairelinux.com>");
+MODULE_AUTHOR("Vivien Didelot <vivien.didelot@...oirfairelinux.com>");
+MODULE_DESCRIPTION("Technologic Systems TS-5500 Board's platform driver");
+MODULE_LICENSE("GPL");
--
1.7.6
--
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