summaryrefslogtreecommitdiffstats
path: root/drivers/soc/versatile
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/soc/versatile')
-rw-r--r--drivers/soc/versatile/Kconfig19
-rw-r--r--drivers/soc/versatile/Makefile2
-rw-r--r--drivers/soc/versatile/soc-integrator.c155
-rw-r--r--drivers/soc/versatile/soc-realview.c138
4 files changed, 314 insertions, 0 deletions
diff --git a/drivers/soc/versatile/Kconfig b/drivers/soc/versatile/Kconfig
new file mode 100644
index 000000000..a928a7fc6
--- /dev/null
+++ b/drivers/soc/versatile/Kconfig
@@ -0,0 +1,19 @@
+#
+# ARM Versatile SoC drivers
+#
+config SOC_INTEGRATOR_CM
+ bool "SoC bus device for the ARM Integrator platform core modules"
+ depends on ARCH_INTEGRATOR
+ select SOC_BUS
+ help
+ Include support for the SoC bus on the ARM Integrator platform
+ core modules providing some sysfs information about the ASIC
+ variant.
+
+config SOC_REALVIEW
+ bool "SoC bus device for the ARM RealView platforms"
+ depends on ARCH_REALVIEW
+ select SOC_BUS
+ help
+ Include support for the SoC bus on the ARM RealView platforms
+ providing some sysfs information about the ASIC variant.
diff --git a/drivers/soc/versatile/Makefile b/drivers/soc/versatile/Makefile
new file mode 100644
index 000000000..cf612fe3a
--- /dev/null
+++ b/drivers/soc/versatile/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_SOC_INTEGRATOR_CM) += soc-integrator.o
+obj-$(CONFIG_SOC_REALVIEW) += soc-realview.o
diff --git a/drivers/soc/versatile/soc-integrator.c b/drivers/soc/versatile/soc-integrator.c
new file mode 100644
index 000000000..a5d7d39ae
--- /dev/null
+++ b/drivers/soc/versatile/soc-integrator.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2014 Linaro Ltd.
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/of.h>
+
+#define INTEGRATOR_HDR_ID_OFFSET 0x00
+
+static u32 integrator_coreid;
+
+static const struct of_device_id integrator_cm_match[] = {
+ { .compatible = "arm,core-module-integrator", },
+ { }
+};
+
+static const char *integrator_arch_str(u32 id)
+{
+ switch ((id >> 16) & 0xff) {
+ case 0x00:
+ return "ASB little-endian";
+ case 0x01:
+ return "AHB little-endian";
+ case 0x03:
+ return "AHB-Lite system bus, bi-endian";
+ case 0x04:
+ return "AHB";
+ case 0x08:
+ return "AHB system bus, ASB processor bus";
+ default:
+ return "Unknown";
+ }
+}
+
+static const char *integrator_fpga_str(u32 id)
+{
+ switch ((id >> 12) & 0xf) {
+ case 0x01:
+ return "XC4062";
+ case 0x02:
+ return "XC4085";
+ case 0x03:
+ return "XVC600";
+ case 0x04:
+ return "EPM7256AE (Altera PLD)";
+ default:
+ return "Unknown";
+ }
+}
+
+static ssize_t integrator_get_manf(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%02x\n", integrator_coreid >> 24);
+}
+
+static struct device_attribute integrator_manf_attr =
+ __ATTR(manufacturer, S_IRUGO, integrator_get_manf, NULL);
+
+static ssize_t integrator_get_arch(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%s\n", integrator_arch_str(integrator_coreid));
+}
+
+static struct device_attribute integrator_arch_attr =
+ __ATTR(arch, S_IRUGO, integrator_get_arch, NULL);
+
+static ssize_t integrator_get_fpga(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%s\n", integrator_fpga_str(integrator_coreid));
+}
+
+static struct device_attribute integrator_fpga_attr =
+ __ATTR(fpga, S_IRUGO, integrator_get_fpga, NULL);
+
+static ssize_t integrator_get_build(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%02x\n", (integrator_coreid >> 4) & 0xFF);
+}
+
+static struct device_attribute integrator_build_attr =
+ __ATTR(build, S_IRUGO, integrator_get_build, NULL);
+
+static int __init integrator_soc_init(void)
+{
+ static struct regmap *syscon_regmap;
+ struct soc_device *soc_dev;
+ struct soc_device_attribute *soc_dev_attr;
+ struct device_node *np;
+ struct device *dev;
+ u32 val;
+ int ret;
+
+ np = of_find_matching_node(NULL, integrator_cm_match);
+ if (!np)
+ return -ENODEV;
+
+ syscon_regmap = syscon_node_to_regmap(np);
+ if (IS_ERR(syscon_regmap))
+ return PTR_ERR(syscon_regmap);
+
+ ret = regmap_read(syscon_regmap, INTEGRATOR_HDR_ID_OFFSET,
+ &val);
+ if (ret)
+ return -ENODEV;
+ integrator_coreid = val;
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return -ENOMEM;
+
+ soc_dev_attr->soc_id = "Integrator";
+ soc_dev_attr->machine = "Integrator";
+ soc_dev_attr->family = "Versatile";
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR(soc_dev)) {
+ kfree(soc_dev_attr);
+ return -ENODEV;
+ }
+ dev = soc_device_to_device(soc_dev);
+
+ device_create_file(dev, &integrator_manf_attr);
+ device_create_file(dev, &integrator_arch_attr);
+ device_create_file(dev, &integrator_fpga_attr);
+ device_create_file(dev, &integrator_build_attr);
+
+ dev_info(dev, "Detected ARM core module:\n");
+ dev_info(dev, " Manufacturer: %02x\n", (val >> 24));
+ dev_info(dev, " Architecture: %s\n", integrator_arch_str(val));
+ dev_info(dev, " FPGA: %s\n", integrator_fpga_str(val));
+ dev_info(dev, " Build: %02x\n", (val >> 4) & 0xFF);
+ dev_info(dev, " Rev: %c\n", ('A' + (val & 0x03)));
+
+ return 0;
+}
+device_initcall(integrator_soc_init);
diff --git a/drivers/soc/versatile/soc-realview.c b/drivers/soc/versatile/soc-realview.c
new file mode 100644
index 000000000..caf698e5f
--- /dev/null
+++ b/drivers/soc/versatile/soc-realview.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2014 Linaro Ltd.
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/of.h>
+
+/* System ID in syscon */
+#define REALVIEW_SYS_ID_OFFSET 0x00
+
+static const struct of_device_id realview_soc_of_match[] = {
+ { .compatible = "arm,realview-eb-soc", },
+ { .compatible = "arm,realview-pb1176-soc", },
+ { .compatible = "arm,realview-pb11mp-soc", },
+ { .compatible = "arm,realview-pba8-soc", },
+ { .compatible = "arm,realview-pbx-soc", },
+ { }
+};
+
+static u32 realview_coreid;
+
+static const char *realview_arch_str(u32 id)
+{
+ switch ((id >> 8) & 0xf) {
+ case 0x04:
+ return "AHB";
+ case 0x05:
+ return "Multi-layer AXI";
+ default:
+ return "Unknown";
+ }
+}
+
+static ssize_t realview_get_manf(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%02x\n", realview_coreid >> 24);
+}
+
+static struct device_attribute realview_manf_attr =
+ __ATTR(manufacturer, S_IRUGO, realview_get_manf, NULL);
+
+static ssize_t realview_get_board(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "HBI-%03x\n", ((realview_coreid >> 16) & 0xfff));
+}
+
+static struct device_attribute realview_board_attr =
+ __ATTR(board, S_IRUGO, realview_get_board, NULL);
+
+static ssize_t realview_get_arch(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%s\n", realview_arch_str(realview_coreid));
+}
+
+static struct device_attribute realview_arch_attr =
+ __ATTR(fpga, S_IRUGO, realview_get_arch, NULL);
+
+static ssize_t realview_get_build(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%02x\n", (realview_coreid & 0xFF));
+}
+
+static struct device_attribute realview_build_attr =
+ __ATTR(build, S_IRUGO, realview_get_build, NULL);
+
+static int realview_soc_probe(struct platform_device *pdev)
+{
+ struct regmap *syscon_regmap;
+ struct soc_device *soc_dev;
+ struct soc_device_attribute *soc_dev_attr;
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ syscon_regmap = syscon_regmap_lookup_by_phandle(np, "regmap");
+ if (IS_ERR(syscon_regmap))
+ return PTR_ERR(syscon_regmap);
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return -ENOMEM;
+
+ ret = of_property_read_string(np, "compatible",
+ &soc_dev_attr->soc_id);
+ if (ret)
+ return -EINVAL;
+
+ soc_dev_attr->machine = "RealView";
+ soc_dev_attr->family = "Versatile";
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR(soc_dev)) {
+ kfree(soc_dev_attr);
+ return -ENODEV;
+ }
+ ret = regmap_read(syscon_regmap, REALVIEW_SYS_ID_OFFSET,
+ &realview_coreid);
+ if (ret)
+ return -ENODEV;
+
+ device_create_file(soc_device_to_device(soc_dev), &realview_manf_attr);
+ device_create_file(soc_device_to_device(soc_dev), &realview_board_attr);
+ device_create_file(soc_device_to_device(soc_dev), &realview_arch_attr);
+ device_create_file(soc_device_to_device(soc_dev), &realview_build_attr);
+
+ dev_info(&pdev->dev, "RealView Syscon Core ID: 0x%08x, HBI-%03x\n",
+ realview_coreid,
+ ((realview_coreid >> 16) & 0xfff));
+ /* FIXME: add attributes for SoC to sysfs */
+ return 0;
+}
+
+static struct platform_driver realview_soc_driver = {
+ .probe = realview_soc_probe,
+ .driver = {
+ .name = "realview-soc",
+ .of_match_table = realview_soc_of_match,
+ },
+};
+builtin_platform_driver(realview_soc_driver);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 13:53:36 +0000