2 * Generic Power Management Routine
4 * Copyright (c) 2006 Andriy Skulysh <askulsyh@gmail.com>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License.
9 #include <linux/suspend.h>
10 #include <linux/delay.h>
11 #include <linux/gfp.h>
14 #include <asm/watchdog.h>
17 #define INTR_OFFSET 0x600
19 #define STBCR 0xffffff82
20 #define STBCR2 0xffffff88
22 #define STBCR_STBY 0x80
23 #define STBCR_MSTP2 0x04
25 #define MCR 0xffffff68
26 #define RTCNT 0xffffff70
40 csr = sh_wdt_read_csr();
42 csr |= WTCSR_CKS_4096;
43 sh_wdt_write_csr(csr);
44 csr = sh_wdt_read_csr();
48 frqcr = ctrl_inw(FRQCR);
49 frqcr &= ~(FRQCR_PLLEN | FRQCR_PSTBY);
50 ctrl_outw(frqcr, FRQCR);
53 stbcr = ctrl_inb(STBCR);
54 ctrl_outb(stbcr | STBCR_STBY | STBCR_MSTP2, STBCR);
56 /* set self-refresh */
58 ctrl_outw(mcr & ~MCR_RFSH, MCR);
60 /* set interrupt handler */
61 asm volatile("stc vbr, %0" : "=r" (vbr_old));
62 vbr_new = get_zeroed_page(GFP_ATOMIC);
64 memcpy((void*)(vbr_new + INTR_OFFSET),
65 &wakeup_start, &wakeup_end - &wakeup_start);
66 asm volatile("ldc %0, vbr" : : "r" (vbr_new));
69 ctrl_outw(mcr | MCR_RFSH | MCR_RMODE, MCR);
73 asm volatile("ldc %0, vbr" : : "r" (vbr_old));
78 frqcr = ctrl_inw(FRQCR);
80 ctrl_outw(frqcr, FRQCR);
83 ctrl_outw(frqcr, FRQCR);
85 ctrl_outb(stbcr, STBCR);