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-rw-r--r--arch/arm/mach-shmobile/pm-rcar.c164
1 files changed, 0 insertions, 164 deletions
diff --git a/arch/arm/mach-shmobile/pm-rcar.c b/arch/arm/mach-shmobile/pm-rcar.c
deleted file mode 100644
index 0af05d288..000000000
--- a/arch/arm/mach-shmobile/pm-rcar.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- * R-Car SYSC Power management support
- *
- * Copyright (C) 2014 Magnus Damm
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/mm.h>
-#include <linux/spinlock.h>
-#include <linux/io.h>
-#include "pm-rcar.h"
-
-/* SYSC Common */
-#define SYSCSR 0x00 /* SYSC Status Register */
-#define SYSCISR 0x04 /* Interrupt Status Register */
-#define SYSCISCR 0x08 /* Interrupt Status Clear Register */
-#define SYSCIER 0x0c /* Interrupt Enable Register */
-#define SYSCIMR 0x10 /* Interrupt Mask Register */
-
-/* SYSC Status Register */
-#define SYSCSR_PONENB 1 /* Ready for power resume requests */
-#define SYSCSR_POFFENB 0 /* Ready for power shutoff requests */
-
-/*
- * Power Control Register Offsets inside the register block for each domain
- * Note: The "CR" registers for ARM cores exist on H1 only
- * Use WFI to power off, CPG/APMU to resume ARM cores on R-Car Gen2
- */
-#define PWRSR_OFFS 0x00 /* Power Status Register */
-#define PWROFFCR_OFFS 0x04 /* Power Shutoff Control Register */
-#define PWROFFSR_OFFS 0x08 /* Power Shutoff Status Register */
-#define PWRONCR_OFFS 0x0c /* Power Resume Control Register */
-#define PWRONSR_OFFS 0x10 /* Power Resume Status Register */
-#define PWRER_OFFS 0x14 /* Power Shutoff/Resume Error */
-
-
-#define SYSCSR_RETRIES 100
-#define SYSCSR_DELAY_US 1
-
-#define PWRER_RETRIES 100
-#define PWRER_DELAY_US 1
-
-#define SYSCISR_RETRIES 1000
-#define SYSCISR_DELAY_US 1
-
-static void __iomem *rcar_sysc_base;
-static DEFINE_SPINLOCK(rcar_sysc_lock); /* SMP CPUs + I/O devices */
-
-static int rcar_sysc_pwr_on_off(const struct rcar_sysc_ch *sysc_ch, bool on)
-{
- unsigned int sr_bit, reg_offs;
- int k;
-
- if (on) {
- sr_bit = SYSCSR_PONENB;
- reg_offs = PWRONCR_OFFS;
- } else {
- sr_bit = SYSCSR_POFFENB;
- reg_offs = PWROFFCR_OFFS;
- }
-
- /* Wait until SYSC is ready to accept a power request */
- for (k = 0; k < SYSCSR_RETRIES; k++) {
- if (ioread32(rcar_sysc_base + SYSCSR) & BIT(sr_bit))
- break;
- udelay(SYSCSR_DELAY_US);
- }
-
- if (k == SYSCSR_RETRIES)
- return -EAGAIN;
-
- /* Submit power shutoff or power resume request */
- iowrite32(BIT(sysc_ch->chan_bit),
- rcar_sysc_base + sysc_ch->chan_offs + reg_offs);
-
- return 0;
-}
-
-static int rcar_sysc_power(const struct rcar_sysc_ch *sysc_ch, bool on)
-{
- unsigned int isr_mask = BIT(sysc_ch->isr_bit);
- unsigned int chan_mask = BIT(sysc_ch->chan_bit);
- unsigned int status;
- unsigned long flags;
- int ret = 0;
- int k;
-
- spin_lock_irqsave(&rcar_sysc_lock, flags);
-
- iowrite32(isr_mask, rcar_sysc_base + SYSCISCR);
-
- /* Submit power shutoff or resume request until it was accepted */
- for (k = 0; k < PWRER_RETRIES; k++) {
- ret = rcar_sysc_pwr_on_off(sysc_ch, on);
- if (ret)
- goto out;
-
- status = ioread32(rcar_sysc_base +
- sysc_ch->chan_offs + PWRER_OFFS);
- if (!(status & chan_mask))
- break;
-
- udelay(PWRER_DELAY_US);
- }
-
- if (k == PWRER_RETRIES) {
- ret = -EIO;
- goto out;
- }
-
- /* Wait until the power shutoff or resume request has completed * */
- for (k = 0; k < SYSCISR_RETRIES; k++) {
- if (ioread32(rcar_sysc_base + SYSCISR) & isr_mask)
- break;
- udelay(SYSCISR_DELAY_US);
- }
-
- if (k == SYSCISR_RETRIES)
- ret = -EIO;
-
- iowrite32(isr_mask, rcar_sysc_base + SYSCISCR);
-
- out:
- spin_unlock_irqrestore(&rcar_sysc_lock, flags);
-
- pr_debug("sysc power domain %d: %08x -> %d\n",
- sysc_ch->isr_bit, ioread32(rcar_sysc_base + SYSCISR), ret);
- return ret;
-}
-
-int rcar_sysc_power_down(const struct rcar_sysc_ch *sysc_ch)
-{
- return rcar_sysc_power(sysc_ch, false);
-}
-
-int rcar_sysc_power_up(const struct rcar_sysc_ch *sysc_ch)
-{
- return rcar_sysc_power(sysc_ch, true);
-}
-
-bool rcar_sysc_power_is_off(const struct rcar_sysc_ch *sysc_ch)
-{
- unsigned int st;
-
- st = ioread32(rcar_sysc_base + sysc_ch->chan_offs + PWRSR_OFFS);
- if (st & BIT(sysc_ch->chan_bit))
- return true;
-
- return false;
-}
-
-void __iomem *rcar_sysc_init(phys_addr_t base)
-{
- rcar_sysc_base = ioremap_nocache(base, PAGE_SIZE);
- if (!rcar_sysc_base)
- panic("unable to ioremap R-Car SYSC hardware block\n");
-
- return rcar_sysc_base;
-}