ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/x86/platform/geode/alix.c b/marvell/linux/arch/x86/platform/geode/alix.c
new file mode 100644
index 0000000..c33f744
--- /dev/null
+++ b/marvell/linux/arch/x86/platform/geode/alix.c
@@ -0,0 +1,195 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * System Specific setup for PCEngines ALIX.
+ * At the moment this means setup of GPIO control of LEDs
+ * on Alix.2/3/6 boards.
+ *
+ * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
+ * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
+ * and Philip Prindeville <philipp@redfish-solutions.com>
+ *
+ * TODO: There are large similarities with leds-net5501.c
+ * by Alessandro Zummo <a.zummo@towertech.it>
+ * In the future leds-net5501.c should be migrated over to platform
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/string.h>
+#include <linux/moduleparam.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/gpio_keys.h>
+#include <linux/dmi.h>
+
+#include <asm/geode.h>
+
+#define BIOS_SIGNATURE_TINYBIOS 0xf0000
+#define BIOS_SIGNATURE_COREBOOT 0x500
+#define BIOS_REGION_SIZE 0x10000
+
+/*
+ * This driver is not modular, but to keep back compatibility
+ * with existing use cases, continuing with module_param is
+ * the easiest way forward.
+ */
+static bool force = 0;
+module_param(force, bool, 0444);
+/* FIXME: Award bios is not automatically detected as Alix platform */
+MODULE_PARM_DESC(force, "Force detection as ALIX.2/ALIX.3 platform");
+
+static struct gpio_keys_button alix_gpio_buttons[] = {
+ {
+ .code = KEY_RESTART,
+ .gpio = 24,
+ .active_low = 1,
+ .desc = "Reset button",
+ .type = EV_KEY,
+ .wakeup = 0,
+ .debounce_interval = 100,
+ .can_disable = 0,
+ }
+};
+static struct gpio_keys_platform_data alix_buttons_data = {
+ .buttons = alix_gpio_buttons,
+ .nbuttons = ARRAY_SIZE(alix_gpio_buttons),
+ .poll_interval = 20,
+};
+
+static struct platform_device alix_buttons_dev = {
+ .name = "gpio-keys-polled",
+ .id = 1,
+ .dev = {
+ .platform_data = &alix_buttons_data,
+ }
+};
+
+static struct gpio_led alix_leds[] = {
+ {
+ .name = "alix:1",
+ .gpio = 6,
+ .default_trigger = "default-on",
+ .active_low = 1,
+ },
+ {
+ .name = "alix:2",
+ .gpio = 25,
+ .default_trigger = "default-off",
+ .active_low = 1,
+ },
+ {
+ .name = "alix:3",
+ .gpio = 27,
+ .default_trigger = "default-off",
+ .active_low = 1,
+ },
+};
+
+static struct gpio_led_platform_data alix_leds_data = {
+ .num_leds = ARRAY_SIZE(alix_leds),
+ .leds = alix_leds,
+};
+
+static struct platform_device alix_leds_dev = {
+ .name = "leds-gpio",
+ .id = -1,
+ .dev.platform_data = &alix_leds_data,
+};
+
+static struct platform_device *alix_devs[] __initdata = {
+ &alix_buttons_dev,
+ &alix_leds_dev,
+};
+
+static void __init register_alix(void)
+{
+ /* Setup LED control through leds-gpio driver */
+ platform_add_devices(alix_devs, ARRAY_SIZE(alix_devs));
+}
+
+static bool __init alix_present(unsigned long bios_phys,
+ const char *alix_sig,
+ size_t alix_sig_len)
+{
+ const size_t bios_len = BIOS_REGION_SIZE;
+ const char *bios_virt;
+ const char *scan_end;
+ const char *p;
+ char name[64];
+
+ if (force) {
+ printk(KERN_NOTICE "%s: forced to skip BIOS test, "
+ "assume system is ALIX.2/ALIX.3\n",
+ KBUILD_MODNAME);
+ return true;
+ }
+
+ bios_virt = phys_to_virt(bios_phys);
+ scan_end = bios_virt + bios_len - (alix_sig_len + 2);
+ for (p = bios_virt; p < scan_end; p++) {
+ const char *tail;
+ char *a;
+
+ if (memcmp(p, alix_sig, alix_sig_len) != 0)
+ continue;
+
+ memcpy(name, p, sizeof(name));
+
+ /* remove the first \0 character from string */
+ a = strchr(name, '\0');
+ if (a)
+ *a = ' ';
+
+ /* cut the string at a newline */
+ a = strchr(name, '\r');
+ if (a)
+ *a = '\0';
+
+ tail = p + alix_sig_len;
+ if ((tail[0] == '2' || tail[0] == '3' || tail[0] == '6')) {
+ printk(KERN_INFO
+ "%s: system is recognized as \"%s\"\n",
+ KBUILD_MODNAME, name);
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static bool __init alix_present_dmi(void)
+{
+ const char *vendor, *product;
+
+ vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+ if (!vendor || strcmp(vendor, "PC Engines"))
+ return false;
+
+ product = dmi_get_system_info(DMI_PRODUCT_NAME);
+ if (!product || (strcmp(product, "ALIX.2D") && strcmp(product, "ALIX.6")))
+ return false;
+
+ printk(KERN_INFO "%s: system is recognized as \"%s %s\"\n",
+ KBUILD_MODNAME, vendor, product);
+
+ return true;
+}
+
+static int __init alix_init(void)
+{
+ const char tinybios_sig[] = "PC Engines ALIX.";
+ const char coreboot_sig[] = "PC Engines\0ALIX.";
+
+ if (!is_geode())
+ return 0;
+
+ if (alix_present(BIOS_SIGNATURE_TINYBIOS, tinybios_sig, sizeof(tinybios_sig) - 1) ||
+ alix_present(BIOS_SIGNATURE_COREBOOT, coreboot_sig, sizeof(coreboot_sig) - 1) ||
+ alix_present_dmi())
+ register_alix();
+
+ return 0;
+}
+device_initcall(alix_init);