The Alchemy power.c file contains both core suspend/resume code, which
is processor specific, and leftovers of the 2.4 PM userspace interface
(sysctls).
This patch moves the userspace interface to the platform.c file and
leaves the core board-independent suspend/resume parts which should be
usable for all Alchemy-based systems intact.
Signed-off-by: Manuel Lauss <mano@xxxxxxxxxxxxxxxxxxxxxxx>
---
arch/mips/au1000/common/platform.c | 305 ++++++++++++++++++++++++++++++++++-
arch/mips/au1000/common/power.c | 318 +-----------------------------------
2 files changed, 306 insertions(+), 317 deletions(-)
diff --git a/arch/mips/au1000/common/platform.c b/arch/mips/au1000/common/platform.c
index 66d6770..8d0f05a 100644
--- a/arch/mips/au1000/common/platform.c
+++ b/arch/mips/au1000/common/platform.c
@@ -6,6 +6,9 @@
* (C) Copyright Embedded Alley Solutions, Inc 2005
* Author: Pantelis Antoniou <pantelis@xxxxxxxxxxxxxxxxx>
*
+ * Some of the routines are right out of init/main.c, whose
+ * copyrights apply here.
+ *
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
@@ -19,7 +22,11 @@
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
-#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pm.h>
+#include <linux/spinlock.h>
+#include <linux/sysctl.h>
+#include <linux/uaccess.h>
#include <asm/mach-au1x00/au1xxx.h>
@@ -322,3 +329,299 @@ static int __init au1xxx_platform_init(void)
}
arch_initcall(au1xxx_platform_init);
+
+
+/*********************************************************************/
+
+
+#ifdef CONFIG_PM
+
+static DEFINE_SPINLOCK(pm_lock);
+
+extern unsigned long save_local_and_disable(int controller);
+extern void restore_local_and_enable(int controller, unsigned long mask);
+extern void local_enable_irq(unsigned int irq_nr);
+extern void au_sleep(void);
+
+/*
+ * Define this to cause the value you write to /proc/sys/pm/sleep to
+ * set the TOY timer for the amount of time you want to sleep.
+ * This is done mainly for testing, but may be useful in other cases.
+ * The value is number of 32KHz ticks to sleep.
+ */
+#define SLEEP_TEST_TIMEOUT 1
+#ifdef SLEEP_TEST_TIMEOUT
+static int sleep_ticks;
+static void wakeup_counter0_set(int ticks)
+{
+ au_writel(au_readl(SYS_TOYREAD) + ticks, SYS_TOYMATCH2);
+ au_sync();
+}
+#endif
+
+static int pm_do_sleep(ctl_table *ctl, int write, struct file *file,
+ void __user *buffer, size_t *len, loff_t *ppos)
+{
+ unsigned long wakeup, flags;
+#ifdef SLEEP_TEST_TIMEOUT
+#define TMPBUFLEN2 16
+ char buf[TMPBUFLEN2], *p;
+#endif
+
+ spin_lock_irqsave(&pm_lock, flags);
+
+ if (!write) {
+ *len = 0;
+ spin_unlock_irqrestore(&pm_lock, flags);
+ return 0;
+ }
+
+#ifdef SLEEP_TEST_TIMEOUT
+ if (*len > TMPBUFLEN2 - 1)
+ return -EFAULT;
+ if (copy_from_user(buf, buffer, *len))
+ return -EFAULT;
+ buf[*len] = 0;
+ p = buf;
+ sleep_ticks = simple_strtoul(p, &p, 0);
+#endif
+
+ /**
+ ** The code below is all system dependent and we should probably
+ ** have a function call out of here to set this up. You need
+ ** to configure the GPIO or timer interrupts that will bring
+ ** you out of sleep.
+ ** For testing, the TOY counter wakeup is useful.
+ **/
+#if 0
+ au_writel(au_readl(SYS_PINSTATERD) & ~(1 << 11), SYS_PINSTATERD);
+
+ /* GPIO 6 can cause a wake up event */
+ wakeup = au_readl(SYS_WAKEMSK);
+ wakeup &= ~(1 << 8); /* turn off match20 wakeup */
+ wakeup |= 1 << 6; /* turn on GPIO 6 wakeup */
+#else
+ /* For testing, allow match20 to wake us up. */
+#ifdef SLEEP_TEST_TIMEOUT
+ wakeup_counter0_set(sleep_ticks);
+#endif
+ wakeup = 1 << 8; /* turn on match20 wakeup */
+#endif
+ au_writel(1, SYS_WAKESRC); /* clear cause */
+ au_sync();
+ au_writel(wakeup, SYS_WAKEMSK);
+ au_sync();
+
+ au_sleep();
+
+ spin_unlock_irqrestore(&pm_lock, flags);
+
+ return 0;
+}
+
+/*
+ * This is the number of bits of precision for the loops_per_jiffy.
+ * Each bit takes on average 1.5/HZ seconds. This (like the original)
+ * is a little better than 1%.
+ */
+#define LPS_PREC 8
+
+static void au1000_calibrate_delay(void)
+{
+ unsigned long ticks, loopbit;
+ int lps_precision = LPS_PREC;
+
+ loops_per_jiffy = 1 << 12;
+
+ while (loops_per_jiffy <<= 1) {
+ /* Wait for "start of" clock tick */
+ ticks = jiffies;
+ while (ticks == jiffies)
+ /* nothing */ ;
+ /* Go ... */
+ ticks = jiffies;
+ __delay(loops_per_jiffy);
+ ticks = jiffies - ticks;
+ if (ticks)
+ break;
+ }
+
+ /*
+ * Do a binary approximation to get loops_per_jiffy set to be equal
+ * one clock (up to lps_precision bits)
+ */
+ loops_per_jiffy >>= 1;
+ loopbit = loops_per_jiffy;
+ while (lps_precision-- && (loopbit >>= 1)) {
+ loops_per_jiffy |= loopbit;
+ ticks = jiffies;
+ while (ticks == jiffies);
+ ticks = jiffies;
+ __delay(loops_per_jiffy);
+ if (jiffies != ticks) /* longer than 1 tick */
+ loops_per_jiffy &= ~loopbit;
+ }
+}
+
+static int pm_do_freq(ctl_table *ctl, int write, struct file *file,
+ void __user *buffer, size_t *len, loff_t *ppos)
+{
+ int retval = 0, i;
+ unsigned long val, pll;
+#define TMPBUFLEN 64
+#define MAX_CPU_FREQ 396
+ char buf[TMPBUFLEN], *p;
+ unsigned long flags, intc0_mask, intc1_mask;
+ unsigned long old_baud_base, old_cpu_freq, old_clk, old_refresh;
+ unsigned long new_baud_base, new_cpu_freq, new_clk, new_refresh;
+ unsigned long baud_rate;
+
+ spin_lock_irqsave(&pm_lock, flags);
+ if (!write)
+ *len = 0;
+ else {
+ /* Parse the new frequency */
+ if (*len > TMPBUFLEN - 1) {
+ spin_unlock_irqrestore(&pm_lock, flags);
+ return -EFAULT;
+ }
+ if (copy_from_user(buf, buffer, *len)) {
+ spin_unlock_irqrestore(&pm_lock, flags);
+ return -EFAULT;
+ }
+ buf[*len] = 0;
+ p = buf;
+ val = simple_strtoul(p, &p, 0);
+ if (val > MAX_CPU_FREQ) {
+ spin_unlock_irqrestore(&pm_lock, flags);
+ return -EFAULT;
+ }
+
+ pll = val / 12;
+ if ((pll > 33) || (pll < 7)) { /* 396 MHz max, 84 MHz min */
+ /* Revisit this for higher speed CPUs */
+ spin_unlock_irqrestore(&pm_lock, flags);
+ return -EFAULT;
+ }
+
+ old_baud_base = get_au1x00_uart_baud_base();
+ old_cpu_freq = get_au1x00_speed();
+
+ new_cpu_freq = pll * 12 * 1000000;
+ new_baud_base = (new_cpu_freq / (2 * ((int)(au_readl(SYS_POWERCTRL)
+ & 0x03) + 2) * 16));
+ set_au1x00_speed(new_cpu_freq);
+ set_au1x00_uart_baud_base(new_baud_base);
+
+ old_refresh = au_readl(MEM_SDREFCFG) & 0x1ffffff;
+ new_refresh = ((old_refresh * new_cpu_freq) / old_cpu_freq) |
+ (au_readl(MEM_SDREFCFG) & ~0x1ffffff);
+
+ au_writel(pll, SYS_CPUPLL);
+ au_sync_delay(1);
+ au_writel(new_refresh, MEM_SDREFCFG);
+ au_sync_delay(1);
+
+ for (i = 0; i < 4; i++)
+ if (au_readl(UART_BASE + UART_MOD_CNTRL +
+ i * 0x00100000) == 3) {
+ old_clk = au_readl(UART_BASE + UART_CLK +
+ i * 0x00100000);
+ baud_rate = old_baud_base / old_clk;
+ /*
+ * We won't get an exact baud rate and the error
+ * could be significant enough that our new
+ * calculation will result in a clock that will
+ * give us a baud rate that's too far off from
+ * what we really want.
+ */
+ if (baud_rate > 100000)
+ baud_rate = 115200;
+ else if (baud_rate > 50000)
+ baud_rate = 57600;
+ else if (baud_rate > 30000)
+ baud_rate = 38400;
+ else if (baud_rate > 17000)
+ baud_rate = 19200;
+ else
+ baud_rate = 9600;
+ new_clk = new_baud_base / baud_rate;
+ au_writel(new_clk, UART_BASE + UART_CLK +
+ i * 0x00100000);
+ au_sync_delay(10);
+ }
+ }
+
+ /*
+ * We don't want _any_ interrupts other than match20. Otherwise our
+ * au1000_calibrate_delay() calculation will be off, potentially a lot.
+ */
+ intc0_mask = save_local_and_disable(0);
+ intc1_mask = save_local_and_disable(1);
+ local_enable_irq(AU1000_TOY_MATCH2_INT);
+ spin_unlock_irqrestore(&pm_lock, flags);
+ au1000_calibrate_delay();
+ restore_local_and_enable(0, intc0_mask);
+ restore_local_and_enable(1, intc1_mask);
+
+ return retval;
+}
+
+
+static struct ctl_table pm_table[] = {
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "sleep",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0600,
+ .proc_handler = &pm_do_sleep
+ },
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "freq",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0600,
+ .proc_handler = &pm_do_freq
+ },
+ {}
+};
+
+static struct ctl_table pm_dir_table[] = {
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "pm",
+ .mode = 0555,
+ .child = pm_table
+ },
+ {}
+};
+
+/*
+ * Initialize power interface
+ */
+static int __init pm_init(void)
+{
+ /* init TOY to tick at 1Hz. No need to wait for access bits
+ * since there's plenty of time between here and the first
+ * suspend cycle.
+ */
+ if (au_readl(SYS_TOYTRIM) != 32767) {
+ au_writel(32767, SYS_TOYTRIM);
+ au_sync();
+ }
+
+ au_writel(0, SYS_WAKESRC);
+ au_sync();
+ au_writel(0, SYS_WAKEMSK);
+ au_sync();
+
+ register_sysctl_table(pm_dir_table);
+
+ return 0;
+}
+
+__initcall(pm_init);
+
+#endif /* CONFIG_PM */
diff --git a/arch/mips/au1000/common/power.c b/arch/mips/au1000/common/power.c
index 7812ebf..4b0f6a1 100644
--- a/arch/mips/au1000/common/power.c
+++ b/arch/mips/au1000/common/power.c
@@ -5,9 +5,6 @@
* Copyright 2001, 2008 MontaVista Software Inc.
* Author: MontaVista Software, Inc. <source@xxxxxxxxxx>
*
- * Some of the routines are right out of init/main.c, whose
- * copyrights apply here.
- *
* 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
@@ -30,30 +27,12 @@
*/
#include <linux/init.h>
-#include <linux/pm.h>
-#include <linux/sysctl.h>
-#include <linux/jiffies.h>
-
-#include <asm/uaccess.h>
#include <asm/cacheflush.h>
#include <asm/mach-au1x00/au1000.h>
#ifdef CONFIG_PM
-#define DEBUG 1
-#ifdef DEBUG
-#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__, ## args)
-#else
-#define DPRINTK(fmt, args...)
-#endif
-
-static void au1000_calibrate_delay(void);
-
-extern unsigned long save_local_and_disable(int controller);
-extern void restore_local_and_enable(int controller, unsigned long mask);
-extern void local_enable_irq(unsigned int irq_nr);
-
-static DEFINE_SPINLOCK(pm_lock);
+extern void save_and_sleep(void);
/*
* We need to save/restore a bunch of core registers that are
@@ -77,22 +56,6 @@ static unsigned int sleep_usbhost_enable;
static unsigned int sleep_usbdev_enable;
static unsigned int sleep_static_memctlr[4][3];
-/*
- * Define this to cause the value you write to /proc/sys/pm/sleep to
- * set the TOY timer for the amount of time you want to sleep.
- * This is done mainly for testing, but may be useful in other cases.
- * The value is number of 32KHz ticks to sleep.
- */
-#define SLEEP_TEST_TIMEOUT 1
-#ifdef SLEEP_TEST_TIMEOUT
-static int sleep_ticks;
-static void wakeup_counter0_set(int ticks)
-{
- au_writel(au_readl(SYS_TOYREAD) + ticks, SYS_TOYMATCH2);
- au_sync();
-}
-#endif
-
static void save_core_regs(void)
{
extern void save_au1xxx_intctl(void);
@@ -190,288 +153,11 @@ static void restore_core_regs(void)
restore_au1xxx_intctl();
}
-unsigned long suspend_mode;
-
-void wakeup_from_suspend(void)
-{
- suspend_mode = 0;
-}
-
-int au_sleep(void)
+void au_sleep(void)
{
- unsigned long wakeup, flags;
- extern void save_and_sleep(void);
-
- spin_lock_irqsave(&pm_lock, flags);
-
save_core_regs();
-
flush_cache_all();
-
- /**
- ** The code below is all system dependent and we should probably
- ** have a function call out of here to set this up. You need
- ** to configure the GPIO or timer interrupts that will bring
- ** you out of sleep.
- ** For testing, the TOY counter wakeup is useful.
- **/
-#if 0
- au_writel(au_readl(SYS_PINSTATERD) & ~(1 << 11), SYS_PINSTATERD);
-
- /* GPIO 6 can cause a wake up event */
- wakeup = au_readl(SYS_WAKEMSK);
- wakeup &= ~(1 << 8); /* turn off match20 wakeup */
- wakeup |= 1 << 6; /* turn on GPIO 6 wakeup */
-#else
- /* For testing, allow match20 to wake us up. */
-#ifdef SLEEP_TEST_TIMEOUT
- wakeup_counter0_set(sleep_ticks);
-#endif
- wakeup = 1 << 8; /* turn on match20 wakeup */
- wakeup = 0;
-#endif
- au_writel(1, SYS_WAKESRC); /* clear cause */
- au_sync();
- au_writel(wakeup, SYS_WAKEMSK);
- au_sync();
-
save_and_sleep();
-
- /*
- * After a wakeup, the cpu vectors back to 0x1fc00000, so
- * it's up to the boot code to get us back here.
- */
restore_core_regs();
- spin_unlock_irqrestore(&pm_lock, flags);
- return 0;
-}
-
-static int pm_do_sleep(ctl_table *ctl, int write, struct file *file,
- void __user *buffer, size_t *len, loff_t *ppos)
-{
-#ifdef SLEEP_TEST_TIMEOUT
-#define TMPBUFLEN2 16
- char buf[TMPBUFLEN2], *p;
-#endif
-
- if (!write)
- *len = 0;
- else {
-#ifdef SLEEP_TEST_TIMEOUT
- if (*len > TMPBUFLEN2 - 1)
- return -EFAULT;
- if (copy_from_user(buf, buffer, *len))
- return -EFAULT;
- buf[*len] = 0;
- p = buf;
- sleep_ticks = simple_strtoul(p, &p, 0);
-#endif
-
- au_sleep();
- }
- return 0;
-}
-
-static int pm_do_freq(ctl_table *ctl, int write, struct file *file,
- void __user *buffer, size_t *len, loff_t *ppos)
-{
- int retval = 0, i;
- unsigned long val, pll;
-#define TMPBUFLEN 64
-#define MAX_CPU_FREQ 396
- char buf[TMPBUFLEN], *p;
- unsigned long flags, intc0_mask, intc1_mask;
- unsigned long old_baud_base, old_cpu_freq, old_clk, old_refresh;
- unsigned long new_baud_base, new_cpu_freq, new_clk, new_refresh;
- unsigned long baud_rate;
-
- spin_lock_irqsave(&pm_lock, flags);
- if (!write)
- *len = 0;
- else {
- /* Parse the new frequency */
- if (*len > TMPBUFLEN - 1) {
- spin_unlock_irqrestore(&pm_lock, flags);
- return -EFAULT;
- }
- if (copy_from_user(buf, buffer, *len)) {
- spin_unlock_irqrestore(&pm_lock, flags);
- return -EFAULT;
- }
- buf[*len] = 0;
- p = buf;
- val = simple_strtoul(p, &p, 0);
- if (val > MAX_CPU_FREQ) {
- spin_unlock_irqrestore(&pm_lock, flags);
- return -EFAULT;
- }
-
- pll = val / 12;
- if ((pll > 33) || (pll < 7)) { /* 396 MHz max, 84 MHz min */
- /* Revisit this for higher speed CPUs */
- spin_unlock_irqrestore(&pm_lock, flags);
- return -EFAULT;
- }
-
- old_baud_base = get_au1x00_uart_baud_base();
- old_cpu_freq = get_au1x00_speed();
-
- new_cpu_freq = pll * 12 * 1000000;
- new_baud_base = (new_cpu_freq / (2 * ((int)(au_readl(SYS_POWERCTRL)
- & 0x03) + 2) * 16));
- set_au1x00_speed(new_cpu_freq);
- set_au1x00_uart_baud_base(new_baud_base);
-
- old_refresh = au_readl(MEM_SDREFCFG) & 0x1ffffff;
- new_refresh = ((old_refresh * new_cpu_freq) / old_cpu_freq) |
- (au_readl(MEM_SDREFCFG) & ~0x1ffffff);
-
- au_writel(pll, SYS_CPUPLL);
- au_sync_delay(1);
- au_writel(new_refresh, MEM_SDREFCFG);
- au_sync_delay(1);
-
- for (i = 0; i < 4; i++)
- if (au_readl(UART_BASE + UART_MOD_CNTRL +
- i * 0x00100000) == 3) {
- old_clk = au_readl(UART_BASE + UART_CLK +
- i * 0x00100000);
- baud_rate = old_baud_base / old_clk;
- /*
- * We won't get an exact baud rate and the error
- * could be significant enough that our new
- * calculation will result in a clock that will
- * give us a baud rate that's too far off from
- * what we really want.
- */
- if (baud_rate > 100000)
- baud_rate = 115200;
- else if (baud_rate > 50000)
- baud_rate = 57600;
- else if (baud_rate > 30000)
- baud_rate = 38400;
- else if (baud_rate > 17000)
- baud_rate = 19200;
- else
- baud_rate = 9600;
- new_clk = new_baud_base / baud_rate;
- au_writel(new_clk, UART_BASE + UART_CLK +
- i * 0x00100000);
- au_sync_delay(10);
- }
- }
-
- /*
- * We don't want _any_ interrupts other than match20. Otherwise our
- * au1000_calibrate_delay() calculation will be off, potentially a lot.
- */
- intc0_mask = save_local_and_disable(0);
- intc1_mask = save_local_and_disable(1);
- local_enable_irq(AU1000_TOY_MATCH2_INT);
- spin_unlock_irqrestore(&pm_lock, flags);
- au1000_calibrate_delay();
- restore_local_and_enable(0, intc0_mask);
- restore_local_and_enable(1, intc1_mask);
-
- return retval;
-}
-
-
-static struct ctl_table pm_table[] = {
- {
- .ctl_name = CTL_UNNUMBERED,
- .procname = "sleep",
- .data = NULL,
- .maxlen = 0,
- .mode = 0600,
- .proc_handler = &pm_do_sleep
- },
- {
- .ctl_name = CTL_UNNUMBERED,
- .procname = "freq",
- .data = NULL,
- .maxlen = 0,
- .mode = 0600,
- .proc_handler = &pm_do_freq
- },
- {}
-};
-
-static struct ctl_table pm_dir_table[] = {
- {
- .ctl_name = CTL_UNNUMBERED,
- .procname = "pm",
- .mode = 0555,
- .child = pm_table
- },
- {}
-};
-
-/*
- * Initialize power interface
- */
-static int __init pm_init(void)
-{
- /* init TOY to tick at 1Hz. No need to wait for access bits
- * since there's plenty of time between here and the first
- * suspend cycle.
- */
- if (au_readl(SYS_TOYTRIM) != 32767) {
- au_writel(32767, SYS_TOYTRIM);
- au_sync();
- }
-
- register_sysctl_table(pm_dir_table);
- return 0;
-}
-
-__initcall(pm_init);
-
-/*
- * This is right out of init/main.c
- */
-
-/*
- * This is the number of bits of precision for the loops_per_jiffy.
- * Each bit takes on average 1.5/HZ seconds. This (like the original)
- * is a little better than 1%.
- */
-#define LPS_PREC 8
-
-static void au1000_calibrate_delay(void)
-{
- unsigned long ticks, loopbit;
- int lps_precision = LPS_PREC;
-
- loops_per_jiffy = 1 << 12;
-
- while (loops_per_jiffy <<= 1) {
- /* Wait for "start of" clock tick */
- ticks = jiffies;
- while (ticks == jiffies)
- /* nothing */ ;
- /* Go ... */
- ticks = jiffies;
- __delay(loops_per_jiffy);
- ticks = jiffies - ticks;
- if (ticks)
- break;
- }
-
- /*
- * Do a binary approximation to get loops_per_jiffy set to be equal
- * one clock (up to lps_precision bits)
- */
- loops_per_jiffy >>= 1;
- loopbit = loops_per_jiffy;
- while (lps_precision-- && (loopbit >>= 1)) {
- loops_per_jiffy |= loopbit;
- ticks = jiffies;
- while (ticks == jiffies);
- ticks = jiffies;
- __delay(loops_per_jiffy);
- if (jiffies != ticks) /* longer than 1 tick */
- loops_per_jiffy &= ~loopbit;
- }
}
#endif /* CONFIG_PM */
--
1.5.6.4
