From: Antony Pavlov <antonynpavlov@gmail.com>
To: linux-mips@linux-mips.org
Cc: Ralf Baechle <ralf@linux-mips.org>,
Lars-Peter Clausen <lars@metafoo.de>,
Maarten ter Huurne <maarten@treewalker.org>,
Antony Pavlov <antonynpavlov@gmail.com>
Subject: [RFC 06/13] MIPS: JZ4750D: Add system reset support
Date: Tue, 23 Oct 2012 21:43:54 +0400 [thread overview]
Message-ID: <1351014241-3207-7-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1351014241-3207-1-git-send-email-antonynpavlov@gmail.com>
Add support for poweroff/reboot on a JZ4750D SoC.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/jz4750d/reset.c | 79 +++++++++++++++++++++++++++++++++++++++++++++
arch/mips/jz4750d/reset.h | 6 ++++
2 files changed, 85 insertions(+)
create mode 100644 arch/mips/jz4750d/reset.c
create mode 100644 arch/mips/jz4750d/reset.h
diff --git a/arch/mips/jz4750d/reset.c b/arch/mips/jz4750d/reset.c
new file mode 100644
index 0000000..eb8441c
--- /dev/null
+++ b/arch/mips/jz4750d/reset.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2012, Antony Pavlov <antonynpavlov@gmail.com>
+ * JZ4750D reset routines
+ *
+ * based on JZ4740 reset routines
+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * 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/io.h>
+#include <linux/kernel.h>
+#include <linux/pm.h>
+
+#include <asm/reboot.h>
+
+#include <asm/mach-jz4750d/base.h>
+#include <asm/mach-jz4750d/timer.h>
+
+static void jz4750d_halt(void)
+{
+ while (1) {
+ __asm__(".set push;\n"
+ ".set mips3;\n"
+ "wait;\n"
+ ".set pop;\n"
+ );
+ }
+}
+
+#define JZ_REG_WDT_DATA 0x00
+#define JZ_REG_WDT_COUNTER_ENABLE 0x04
+#define JZ_REG_WDT_COUNTER 0x08
+#define JZ_REG_WDT_CTRL 0x0c
+
+static void jz4750d_restart(char *command)
+{
+ void __iomem *wdt_base = ioremap(JZ4750D_WDT_BASE_ADDR, 0x0f);
+
+ jz4750d_timer_enable_watchdog();
+
+ writeb(0, wdt_base + JZ_REG_WDT_COUNTER_ENABLE);
+
+ writew(0, wdt_base + JZ_REG_WDT_COUNTER);
+ writew(0, wdt_base + JZ_REG_WDT_DATA);
+ writew(BIT(2), wdt_base + JZ_REG_WDT_CTRL);
+
+ writeb(1, wdt_base + JZ_REG_WDT_COUNTER_ENABLE);
+ jz4750d_halt();
+}
+
+#define JZ_REG_RTC_CTRL 0x00
+#define JZ_REG_RTC_HIBERNATE 0x20
+
+#define JZ_RTC_CTRL_WRDY BIT(7)
+
+static void jz4750d_power_off(void)
+{
+ void __iomem *rtc_base = ioremap(JZ4750D_RTC_BASE_ADDR, 0x24);
+ uint32_t ctrl;
+
+ do {
+ ctrl = readl(rtc_base + JZ_REG_RTC_CTRL);
+ } while (!(ctrl & JZ_RTC_CTRL_WRDY));
+
+ writel(1, rtc_base + JZ_REG_RTC_HIBERNATE);
+ jz4750d_halt();
+}
+
+void jz4750d_reset_init(void)
+{
+ _machine_restart = jz4750d_restart;
+ _machine_halt = jz4750d_halt;
+ pm_power_off = jz4750d_power_off;
+}
diff --git a/arch/mips/jz4750d/reset.h b/arch/mips/jz4750d/reset.h
new file mode 100644
index 0000000..e00d1e1
--- /dev/null
+++ b/arch/mips/jz4750d/reset.h
@@ -0,0 +1,6 @@
+#ifndef __MIPS_JZ4750D_RESET_H__
+#define __MIPS_JZ4750D_RESET_H__
+
+extern void jz4750d_reset_init(void);
+
+#endif
--
1.7.10.4
next prev parent reply other threads:[~2012-10-23 17:49 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-23 17:43 [RFC 00/13] MIPS: JZ4750D: Add base support for Ingenic JZ4750D SOC Antony Pavlov
2012-10-23 17:43 ` [RFC 01/13] MIPS: JZ4750D: Add base support for Ingenic JZ4750D System-on-a-Chip Antony Pavlov
2012-10-23 17:43 ` [RFC 02/13] MIPS: JZ4750D: Add clock API support Antony Pavlov
2012-10-23 17:43 ` [RFC 03/13] MIPS: JZ4750D: Add IRQ handler code Antony Pavlov
2012-10-23 17:43 ` [RFC 04/13] MIPS: JZ4750D: Add timer support Antony Pavlov
2012-10-23 17:43 ` [RFC 05/13] MIPS: JZ4750D: Add clocksource/clockevent support Antony Pavlov
2012-10-23 17:43 ` Antony Pavlov [this message]
2012-10-23 17:43 ` [RFC 07/13] MIPS: JZ4750D: Add setup code Antony Pavlov
2012-10-23 17:43 ` [RFC 08/13] MIPS: JZ4750D: Add serial support Antony Pavlov
2012-10-23 17:43 ` [RFC 09/13] MIPS: JZ4750D: Add prom support Antony Pavlov
2012-10-23 17:43 ` [RFC 10/13] MIPS: JZ4750D: Add platform UART devices Antony Pavlov
2012-10-23 17:43 ` [RFC 11/13] MIPS: JZ4750D: Add Kbuild files Antony Pavlov
2012-10-24 16:16 ` Maarten ter Huurne
2012-10-24 16:56 ` Ralf Baechle
2012-10-24 17:18 ` Antony Pavlov
2012-10-24 17:43 ` Florian Fainelli
2012-10-24 18:15 ` Maarten ter Huurne
2012-10-23 17:44 ` [RFC 12/13] MIPS: JZ4750D: Add rzx50 board support Antony Pavlov
2012-10-23 17:44 ` [RFC 13/13] MIPS: rzx50: Add defconfig file Antony Pavlov
2012-10-23 18:15 ` [RFC 00/13] MIPS: JZ4750D: Add base support for Ingenic JZ4750D SOC Lars-Peter Clausen
2012-10-23 19:57 ` Steven J. Hill
2012-10-24 8:25 ` Lars-Peter Clausen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1351014241-3207-7-git-send-email-antonynpavlov@gmail.com \
--to=antonynpavlov@gmail.com \
--cc=lars@metafoo.de \
--cc=linux-mips@linux-mips.org \
--cc=maarten@treewalker.org \
--cc=ralf@linux-mips.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox