diff options
| -rw-r--r-- | arch/mips/loongson/lemote-2f/Makefile | 6 | ||||
| -rw-r--r-- | arch/mips/loongson/lemote-2f/pm.c | 73 |
2 files changed, 79 insertions, 0 deletions
diff --git a/arch/mips/loongson/lemote-2f/Makefile b/arch/mips/loongson/lemote-2f/Makefile index da543b1b51e1..5add7b2ead1c 100644 --- a/arch/mips/loongson/lemote-2f/Makefile +++ b/arch/mips/loongson/lemote-2f/Makefile @@ -3,3 +3,9 @@ # obj-y += irq.o reset.o + +# +# Suspend Support +# + +obj-$(CONFIG_LOONGSON_SUSPEND) += pm.o diff --git a/arch/mips/loongson/lemote-2f/pm.c b/arch/mips/loongson/lemote-2f/pm.c new file mode 100644 index 000000000000..8090d0514221 --- /dev/null +++ b/arch/mips/loongson/lemote-2f/pm.c @@ -0,0 +1,73 @@ +/* + * Lemote loongson2f family machines' specific suspend support + * + * 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/suspend.h> +#include <linux/interrupt.h> +#include <linux/pm.h> +#include <linux/i8042.h> + +#include <asm/i8259.h> +#include <asm/mipsregs.h> +#include <asm/bootinfo.h> + +#include <loongson.h> + +#define I8042_KBD_IRQ 1 +#define I8042_CTR_KBDINT 0x01 +#define I8042_CTR_KBDDIS 0x10 + +static unsigned char i8042_ctr; + +static int i8042_enable_kbd_port(void) +{ + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_RCTR)) { + pr_err("i8042.c: Can't read CTR while enabling i8042 kbd port." + "\n"); + return -EIO; + } + + i8042_ctr &= ~I8042_CTR_KBDDIS; + i8042_ctr |= I8042_CTR_KBDINT; + + if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { + i8042_ctr &= ~I8042_CTR_KBDINT; + i8042_ctr |= I8042_CTR_KBDDIS; + pr_err("i8042.c: Failed to enable KBD port.\n"); + + return -EIO; + } + + return 0; +} + +/* + * The i8042 is connnected to i8259A + */ +void setup_wakeup_events(void) +{ + int irq_mask; + + switch (mips_machtype) { + case MACH_LEMOTE_ML2F7: + case MACH_LEMOTE_YL2F89: + /* open the keyboard irq in i8259A */ + outb((0xff & ~(1 << I8042_KBD_IRQ)), PIC_MASTER_IMR); + irq_mask = inb(PIC_MASTER_IMR); + + /* enable keyboard port */ + i8042_enable_kbd_port(); + break; + + default: + break; + } +} |