Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 153 insertions, 0 deletions

diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c
new file mode 100644
index 000000000..ca9945f51
--- /dev/null
+++ b/arch/sh/kernel/cpu/shmobile/pm.c
@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/kernel/cpu/shmobile/pm.c
+ *
+ * Power management support code for SuperH Mobile
+ *
+ *  Copyright (C) 2009 Magnus Damm
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/suspend.h>
+#include <asm/suspend.h>
+#include <linux/uaccess.h>
+#include <asm/cacheflush.h>
+#include <asm/bl_bit.h>
+
+/*
+ * Notifier lists for pre/post sleep notification
+ */
+ATOMIC_NOTIFIER_HEAD(sh_mobile_pre_sleep_notifier_list);
+ATOMIC_NOTIFIER_HEAD(sh_mobile_post_sleep_notifier_list);
+
+/*
+ * Sleep modes available on SuperH Mobile:
+ *
+ * Sleep mode is just plain "sleep" instruction
+ * Sleep Self-Refresh mode is above plus RAM put in Self-Refresh
+ * Standby Self-Refresh mode is above plus stopped clocks
+ */
+#define SUSP_MODE_SLEEP		(SUSP_SH_SLEEP)
+#define SUSP_MODE_SLEEP_SF	(SUSP_SH_SLEEP | SUSP_SH_SF)
+#define SUSP_MODE_STANDBY_SF	(SUSP_SH_STANDBY | SUSP_SH_SF)
+#define SUSP_MODE_RSTANDBY_SF \
+	(SUSP_SH_RSTANDBY | SUSP_SH_MMU | SUSP_SH_REGS | SUSP_SH_SF)
+ /*
+  * U-standby mode is unsupported since it needs bootloader hacks
+  */
+
+#ifdef CONFIG_CPU_SUBTYPE_SH7724
+#define RAM_BASE 0xfd800000 /* RSMEM */
+#else
+#define RAM_BASE 0xe5200000 /* ILRAM */
+#endif
+
+void sh_mobile_call_standby(unsigned long mode)
+{
+	void *onchip_mem = (void *)RAM_BASE;
+	struct sh_sleep_data *sdp = onchip_mem;
+	void (*standby_onchip_mem)(unsigned long, unsigned long);
+
+	/* code located directly after data structure */
+	standby_onchip_mem = (void *)(sdp + 1);
+
+	atomic_notifier_call_chain(&sh_mobile_pre_sleep_notifier_list,
+				   mode, NULL);
+
+	/* flush the caches if MMU flag is set */
+	if (mode & SUSP_SH_MMU)
+		flush_cache_all();
+
+	/* Let assembly snippet in on-chip memory handle the rest */
+	standby_onchip_mem(mode, RAM_BASE);
+
+	atomic_notifier_call_chain(&sh_mobile_post_sleep_notifier_list,
+				   mode, NULL);
+}
+
+extern char sh_mobile_sleep_enter_start;
+extern char sh_mobile_sleep_enter_end;
+
+extern char sh_mobile_sleep_resume_start;
+extern char sh_mobile_sleep_resume_end;
+
+unsigned long sh_mobile_sleep_supported = SUSP_SH_SLEEP;
+
+void sh_mobile_register_self_refresh(unsigned long flags,
+				     void *pre_start, void *pre_end,
+				     void *post_start, void *post_end)
+{
+	void *onchip_mem = (void *)RAM_BASE;
+	void *vp;
+	struct sh_sleep_data *sdp;
+	int n;
+
+	/* part 0: data area */
+	sdp = onchip_mem;
+	sdp->addr.stbcr = 0xa4150020; /* STBCR */
+	sdp->addr.bar = 0xa4150040; /* BAR */
+	sdp->addr.pteh = 0xff000000; /* PTEH */
+	sdp->addr.ptel = 0xff000004; /* PTEL */
+	sdp->addr.ttb = 0xff000008; /* TTB */
+	sdp->addr.tea = 0xff00000c; /* TEA */
+	sdp->addr.mmucr = 0xff000010; /* MMUCR */
+	sdp->addr.ptea = 0xff000034; /* PTEA */
+	sdp->addr.pascr = 0xff000070; /* PASCR */
+	sdp->addr.irmcr = 0xff000078; /* IRMCR */
+	sdp->addr.ccr = 0xff00001c; /* CCR */
+	sdp->addr.ramcr = 0xff000074; /* RAMCR */
+	vp = sdp + 1;
+
+	/* part 1: common code to enter sleep mode */
+	n = &sh_mobile_sleep_enter_end - &sh_mobile_sleep_enter_start;
+	memcpy(vp, &sh_mobile_sleep_enter_start, n);
+	vp += roundup(n, 4);
+
+	/* part 2: board specific code to enter self-refresh mode */
+	n = pre_end - pre_start;
+	memcpy(vp, pre_start, n);
+	sdp->sf_pre = (unsigned long)vp;
+	vp += roundup(n, 4);
+
+	/* part 3: board specific code to resume from self-refresh mode */
+	n = post_end - post_start;
+	memcpy(vp, post_start, n);
+	sdp->sf_post = (unsigned long)vp;
+	vp += roundup(n, 4);
+
+	/* part 4: common code to resume from sleep mode */
+	WARN_ON(vp > (onchip_mem + 0x600));
+	vp = onchip_mem + 0x600; /* located at interrupt vector */
+	n = &sh_mobile_sleep_resume_end - &sh_mobile_sleep_resume_start;
+	memcpy(vp, &sh_mobile_sleep_resume_start, n);
+	sdp->resume = (unsigned long)vp;
+
+	sh_mobile_sleep_supported |= flags;
+}
+
+static int sh_pm_enter(suspend_state_t state)
+{
+	if (!(sh_mobile_sleep_supported & SUSP_MODE_STANDBY_SF))
+		return -ENXIO;
+
+	local_irq_disable();
+	set_bl_bit();
+	sh_mobile_call_standby(SUSP_MODE_STANDBY_SF);
+	local_irq_disable();
+	clear_bl_bit();
+	return 0;
+}
+
+static const struct platform_suspend_ops sh_pm_ops = {
+	.enter          = sh_pm_enter,
+	.valid          = suspend_valid_only_mem,
+};
+
+static int __init sh_pm_init(void)
+{
+	suspend_set_ops(&sh_pm_ops);
+	return sh_mobile_setup_cpuidle();
+}
+
+late_initcall(sh_pm_init);