MIPS: Lemote 2F: Add reset support

Fuloong 2F, Yeeloong 2F and Menglong 2F have different reset / shutdown
logic.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: zhangfx@lemote.com
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: Nicholas Mc Guire <hofrat@hofr.at>
Cc: Arnaud Patard <apatard@mandriva.com>
Cc: loongson-dev@googlegroups.com
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/include/asm/mach-loongson/loongson.h b/arch/mips/include/asm/mach-loongson/loongson.h
index 62171f240c7bc4e443d386b1c6ac5a1635eda0cd..99113902719ae417433985014fe6f31592f83d41 100644 (file)
--- a/arch/mips/include/asm/mach-loongson/loongson.h
+++ b/arch/mips/include/asm/mach-loongson/loongson.h
@@ -42,6 +42,13 @@ extern void __init set_irq_trigger_mode(void);
 extern void __init mach_init_irq(void);
 extern void mach_irq_dispatch(unsigned int pending);
 
+/* We need this in some places... */
+#define delay()        ({              \
+       int x;                          \
+       for (x = 0; x < 100000; x++)    \
+               __asm__ __volatile__(""); \
+})
+
 #define LOONGSON_REG(x) \
        (*(volatile u32 *)((char *)CKSEG1ADDR(LOONGSON_REG_BASE) + (x)))
 

diff --git a/arch/mips/loongson/lemote-2f/Makefile b/arch/mips/loongson/lemote-2f/Makefile
index 2e188974d56bba4138245bf90716752dab09dd80..da543b1b51e1d0928636e8901fe30c973b99955e 100644 (file)
--- a/arch/mips/loongson/lemote-2f/Makefile
+++ b/arch/mips/loongson/lemote-2f/Makefile
@@ -2,4 +2,4 @@
 # Makefile for lemote loongson2f family machines
 #
 
-obj-y += irq.o
+obj-y += irq.o reset.o

diff --git a/arch/mips/loongson/lemote-2f/reset.c b/arch/mips/loongson/lemote-2f/reset.c
new file mode 100644 (file)
index 0000000..0458a1c
--- /dev/null
+++ b/arch/mips/loongson/lemote-2f/reset.c
@@ -0,0 +1,172 @@
+/* Board-specific reboot/shutdown routines
+ *
+ * Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
+ *
+ * Copyright (C) 2009 Lemote Inc.
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/types.h>
+
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+#include <cs5536/cs5536.h>
+
+static void reset_cpu(void)
+{
+       /*
+        * reset cpu to full speed, this is needed when enabling cpu frequency
+        * scalling
+        */
+       LOONGSON_CHIPCFG0 |= 0x7;
+}
+
+/* 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 */
+
+/*
+ * The following registers are determined by the EC index configuration.
+ * 1. fill the PORT_HIGH as EC register high part.
+ * 2. fill the PORT_LOW as EC register low part.
+ * 3. fill the PORT_DATA as EC register write data or get the data from it.
+ */
+
+#define        EC_IO_PORT_HIGH 0x0381
+#define        EC_IO_PORT_LOW  0x0382
+#define        EC_IO_PORT_DATA 0x0383
+#define        REG_RESET_HIGH  0xF4    /* reset the machine auto-clear : rd/wr */
+#define REG_RESET_LOW  0xEC
+#define        BIT_RESET_ON    (1 << 0)
+
+void ml2f_reboot(void)
+{
+       reset_cpu();
+
+       /* sending an reset signal to EC(embedded controller) */
+       outb(REG_RESET_HIGH, EC_IO_PORT_HIGH);
+       outb(REG_RESET_LOW, EC_IO_PORT_LOW);
+       mmiowb();
+       outb(BIT_RESET_ON, EC_IO_PORT_DATA);
+       mmiowb();
+}
+
+#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:
+               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:
+               fl2f_shutdown();
+               break;
+       case MACH_LEMOTE_ML2F7:
+               ml2f_shutdown();
+               break;
+       case MACH_LEMOTE_YL2F89:
+               yl2f89_shutdown();
+               break;
+       default:
+               break;
+       }
+}