#include <asm/io.h>
#include "pm-rcar.h"
-/* SYSC */
-#define SYSCSR 0x00
-#define SYSCISR 0x04
-#define SYSCISCR 0x08
+/* 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 */
-#define PWRSR_OFFS 0x00
-#define PWROFFCR_OFFS 0x04
-#define PWRONCR_OFFS 0x0c
-#define PWRER_OFFS 0x14
+/* SYSC Status Register */
+#define SYSCSR_PONENB 1 /* Ready for power resume requests */
+#define SYSCSR_POFFENB 0 /* Ready for power shutoff requests */
-#define SYSCSR_RETRIES 100
-#define SYSCSR_DELAY_US 1
+/*
+ * 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
+#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(struct rcar_sysc_ch *sysc_ch,
- int sr_bit, int reg_offs)
+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) & (1 << sr_bit))
+ if (ioread32(rcar_sysc_base + SYSCSR) & BIT(sr_bit))
break;
udelay(SYSCSR_DELAY_US);
}
if (k == SYSCSR_RETRIES)
return -EAGAIN;
- iowrite32(1 << sysc_ch->chan_bit,
+ /* 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_pwr_off(struct rcar_sysc_ch *sysc_ch)
-{
- return rcar_sysc_pwr_on_off(sysc_ch, 0, PWROFFCR_OFFS);
-}
-
-static int rcar_sysc_pwr_on(struct rcar_sysc_ch *sysc_ch)
+static int rcar_sysc_power(const struct rcar_sysc_ch *sysc_ch, bool on)
{
- return rcar_sysc_pwr_on_off(sysc_ch, 1, PWRONCR_OFFS);
-}
-
-static int rcar_sysc_update(struct rcar_sysc_ch *sysc_ch,
- int (*on_off_fn)(struct rcar_sysc_ch *))
-{
- unsigned int isr_mask = 1 << sysc_ch->isr_bit;
- unsigned int chan_mask = 1 << sysc_ch->chan_bit;
+ 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;
iowrite32(isr_mask, rcar_sysc_base + SYSCISCR);
- do {
- ret = on_off_fn(sysc_ch);
+ /* 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);
- } while (status & chan_mask);
+ 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;
return ret;
}
-int rcar_sysc_power_down(struct rcar_sysc_ch *sysc_ch)
+int rcar_sysc_power_down(const struct rcar_sysc_ch *sysc_ch)
{
- return rcar_sysc_update(sysc_ch, rcar_sysc_pwr_off);
+ return rcar_sysc_power(sysc_ch, false);
}
-int rcar_sysc_power_up(struct rcar_sysc_ch *sysc_ch)
+int rcar_sysc_power_up(const struct rcar_sysc_ch *sysc_ch)
{
- return rcar_sysc_update(sysc_ch, rcar_sysc_pwr_on);
+ return rcar_sysc_power(sysc_ch, true);
}
-bool rcar_sysc_power_is_off(struct rcar_sysc_ch *sysc_ch)
+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 & (1 << sysc_ch->chan_bit))
+ if (st & BIT(sysc_ch->chan_bit))
return true;
return false;
#define AVECR IOMEM(0xfe700040)
#define R8A7779_SCU_BASE 0xf0000000
-static struct rcar_sysc_ch r8a7779_ch_cpu1 = {
+static const struct rcar_sysc_ch r8a7779_ch_cpu1 = {
.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
.chan_bit = 1, /* ARM1 */
.isr_bit = 1, /* ARM1 */
};
-static struct rcar_sysc_ch r8a7779_ch_cpu2 = {
+static const struct rcar_sysc_ch r8a7779_ch_cpu2 = {
.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
.chan_bit = 2, /* ARM2 */
.isr_bit = 2, /* ARM2 */
};
-static struct rcar_sysc_ch r8a7779_ch_cpu3 = {
+static const struct rcar_sysc_ch r8a7779_ch_cpu3 = {
.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
.chan_bit = 3, /* ARM3 */
.isr_bit = 3, /* ARM3 */
};
-static struct rcar_sysc_ch *r8a7779_ch_cpu[4] = {
+static const struct rcar_sysc_ch * const r8a7779_ch_cpu[4] = {
[1] = &r8a7779_ch_cpu1,
[2] = &r8a7779_ch_cpu2,
[3] = &r8a7779_ch_cpu3,
static int r8a7779_platform_cpu_kill(unsigned int cpu)
{
- struct rcar_sysc_ch *ch = NULL;
+ const struct rcar_sysc_ch *ch = NULL;
int ret = -EIO;
cpu = cpu_logical_map(cpu);
static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
- struct rcar_sysc_ch *ch = NULL;
+ const struct rcar_sysc_ch *ch = NULL;
unsigned int lcpu = cpu_logical_map(cpu);
int ret;
projects / cascardo / linux.git / commitdiff