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-rw-r--r--arch/mips/loongson2ef/lemote-2f/reset.c155
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;
+ }
+}