1 files changed, 155 insertions, 0 deletions
diff --git a/arch/mips/loongson2ef/lemote-2f/reset.c b/arch/mips/loongson2ef/lemote-2f/reset.c
new file mode 100644
index 000000000..197dae4ff
--- /dev/null
+++ b/arch/mips/loongson2ef/lemote-2f/reset.c
@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Board-specific reboot/shutdown routines
+ *
+ * Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
+ *
+ * Copyright (C) 2009 Lemote Inc.
+ * Author: Wu Zhangjin, wuzhangjin@gmail.com
+ */
+
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/types.h>
+
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+#include <cs5536/cs5536.h>
+#include "ec_kb3310b.h"
+
+static void reset_cpu(void)
+{
+	/*
+	 * reset cpu to full speed, this is needed when enabling cpu frequency
+	 * scalling
+	 */
+	writel(readl(LOONGSON_CHIPCFG) | 0x7, LOONGSON_CHIPCFG);
+}
+
+/* reset support for fuloong2f */
+
+static void fl2f_reboot(void)
+{
+	reset_cpu();
+
+	/* send a reset signal to south bridge.
+	 *
+	 * NOTE: if enable "Power Management" in kernel, rtl8169 will not reset
+	 * normally with this reset operation and it will not work in PMON, but
+	 * you can type halt command and then reboot, seems the hardware reset
+	 * logic not work normally.
+	 */
+	{
+		u32 hi, lo;
+		_rdmsr(DIVIL_MSR_REG(DIVIL_SOFT_RESET), &hi, &lo);
+		lo |= 0x00000001;
+		_wrmsr(DIVIL_MSR_REG(DIVIL_SOFT_RESET), hi, lo);
+	}
+}
+
+static void fl2f_shutdown(void)
+{
+	u32 hi, lo, val;
+	int gpio_base;
+
+	/* get gpio base */
+	_rdmsr(DIVIL_MSR_REG(DIVIL_LBAR_GPIO), &hi, &lo);
+	gpio_base = lo & 0xff00;
+
+	/* make cs5536 gpio13 output enable */
+	val = inl(gpio_base + GPIOL_OUT_EN);
+	val &= ~(1 << (16 + 13));
+	val |= (1 << 13);
+	outl(val, gpio_base + GPIOL_OUT_EN);
+	mmiowb();
+	/* make cs5536 gpio13 output low level voltage. */
+	val = inl(gpio_base + GPIOL_OUT_VAL) & ~(1 << (13));
+	val |= (1 << (16 + 13));
+	outl(val, gpio_base + GPIOL_OUT_VAL);
+	mmiowb();
+}
+
+/* reset support for yeeloong2f and mengloong2f notebook */
+
+static void ml2f_reboot(void)
+{
+	reset_cpu();
+
+	/* sending an reset signal to EC(embedded controller) */
+	ec_write(REG_RESET, BIT_RESET_ON);
+}
+
+#define yl2f89_reboot ml2f_reboot
+
+/* menglong(7inches) laptop has different shutdown logic from 8.9inches */
+#define EC_SHUTDOWN_IO_PORT_HIGH 0xff2d
+#define EC_SHUTDOWN_IO_PORT_LOW	 0xff2e
+#define EC_SHUTDOWN_IO_PORT_DATA 0xff2f
+#define REG_SHUTDOWN_HIGH	 0xFC
+#define REG_SHUTDOWN_LOW	 0x29
+#define BIT_SHUTDOWN_ON		 (1 << 1)
+
+static void ml2f_shutdown(void)
+{
+	u8 val;
+	u64 i;
+
+	outb(REG_SHUTDOWN_HIGH, EC_SHUTDOWN_IO_PORT_HIGH);
+	outb(REG_SHUTDOWN_LOW, EC_SHUTDOWN_IO_PORT_LOW);
+	mmiowb();
+	val = inb(EC_SHUTDOWN_IO_PORT_DATA);
+	outb(val & (~BIT_SHUTDOWN_ON), EC_SHUTDOWN_IO_PORT_DATA);
+	mmiowb();
+	/* need enough wait here... how many microseconds needs? */
+	for (i = 0; i < 0x10000; i++)
+		delay();
+	outb(val | BIT_SHUTDOWN_ON, EC_SHUTDOWN_IO_PORT_DATA);
+	mmiowb();
+}
+
+static void yl2f89_shutdown(void)
+{
+	/* cpu-gpio0 output low */
+	LOONGSON_GPIODATA &= ~0x00000001;
+	/* cpu-gpio0 as output */
+	LOONGSON_GPIOIE &= ~0x00000001;
+}
+
+void mach_prepare_reboot(void)
+{
+	switch (mips_machtype) {
+	case MACH_LEMOTE_FL2F:
+	case MACH_LEMOTE_NAS:
+	case MACH_LEMOTE_LL2F:
+		fl2f_reboot();
+		break;
+	case MACH_LEMOTE_ML2F7:
+		ml2f_reboot();
+		break;
+	case MACH_LEMOTE_YL2F89:
+		yl2f89_reboot();
+		break;
+	default:
+		break;
+	}
+}
+
+void mach_prepare_shutdown(void)
+{
+	switch (mips_machtype) {
+	case MACH_LEMOTE_FL2F:
+	case MACH_LEMOTE_NAS:
+	case MACH_LEMOTE_LL2F:
+		fl2f_shutdown();
+		break;
+	case MACH_LEMOTE_ML2F7:
+		ml2f_shutdown();
+		break;
+	case MACH_LEMOTE_YL2F89:
+		yl2f89_shutdown();
+		break;
+	default:
+		break;
+	}
+}