MIPS: Alchemy: Fix up PM code on Au1550/Au1200
Au1550/Au1200 have a different memory controller which requires additi-
onal code to properly put memory to sleep (code taken from AMD/RMI's
Linux-2.6.11 source package).
Also fix up the remaining pm-related paths to compile on Au1200/Au1550
platforms.
Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/alchemy/common/power.c b/arch/mips/alchemy/common/power.c
index 997dd56..f08312b 100644
--- a/arch/mips/alchemy/common/power.c
+++ b/arch/mips/alchemy/common/power.c
@@ -35,7 +35,6 @@
#include <linux/jiffies.h>
#include <asm/uaccess.h>
-#include <asm/cacheflush.h>
#include <asm/mach-au1x00/au1000.h>
#ifdef CONFIG_PM
@@ -47,8 +46,6 @@
#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);
@@ -64,17 +61,15 @@
* We only have to save/restore registers that aren't otherwise
* done as part of a driver pm_* function.
*/
-static unsigned int sleep_aux_pll_cntrl;
-static unsigned int sleep_cpu_pll_cntrl;
-static unsigned int sleep_pin_function;
-static unsigned int sleep_uart0_inten;
-static unsigned int sleep_uart0_fifoctl;
-static unsigned int sleep_uart0_linectl;
-static unsigned int sleep_uart0_clkdiv;
-static unsigned int sleep_uart0_enable;
-static unsigned int sleep_usbhost_enable;
-static unsigned int sleep_usbdev_enable;
-static unsigned int sleep_static_memctlr[4][3];
+static unsigned int sleep_uart0_inten;
+static unsigned int sleep_uart0_fifoctl;
+static unsigned int sleep_uart0_linectl;
+static unsigned int sleep_uart0_clkdiv;
+static unsigned int sleep_uart0_enable;
+static unsigned int sleep_usb[2];
+static unsigned int sleep_sys_clocks[5];
+static unsigned int sleep_sys_pinfunc;
+static unsigned int sleep_static_memctlr[4][3];
/*
* Define this to cause the value you write to /proc/sys/pm/sleep to
@@ -108,31 +103,45 @@
sleep_uart0_linectl = au_readl(UART0_ADDR + UART_LCR);
sleep_uart0_clkdiv = au_readl(UART0_ADDR + UART_CLK);
sleep_uart0_enable = au_readl(UART0_ADDR + UART_MOD_CNTRL);
+ au_sync();
+#ifndef CONFIG_SOC_AU1200
/* Shutdown USB host/device. */
- sleep_usbhost_enable = au_readl(USB_HOST_CONFIG);
+ sleep_usb[0] = au_readl(USB_HOST_CONFIG);
/* There appears to be some undocumented reset register.... */
- au_writel(0, 0xb0100004); au_sync();
- au_writel(0, USB_HOST_CONFIG); au_sync();
+ au_writel(0, 0xb0100004);
+ au_sync();
+ au_writel(0, USB_HOST_CONFIG);
+ au_sync();
- sleep_usbdev_enable = au_readl(USBD_ENABLE);
- au_writel(0, USBD_ENABLE); au_sync();
+ sleep_usb[1] = au_readl(USBD_ENABLE);
+ au_writel(0, USBD_ENABLE);
+ au_sync();
+
+#else /* AU1200 */
+
+ /* enable access to OTG mmio so we can save OTG CAP/MUX.
+ * FIXME: write an OTG driver and move this stuff there!
+ */
+ au_writel(au_readl(USB_MSR_BASE + 4) | (1 << 6), USB_MSR_BASE + 4);
+ au_sync();
+ sleep_usb[0] = au_readl(0xb4020020); /* OTG_CAP */
+ sleep_usb[1] = au_readl(0xb4020024); /* OTG_MUX */
+#endif
/* Save interrupt controller state. */
save_au1xxx_intctl();
/* Clocks and PLLs. */
- sleep_aux_pll_cntrl = au_readl(SYS_AUXPLL);
+ sleep_sys_clocks[0] = au_readl(SYS_FREQCTRL0);
+ sleep_sys_clocks[1] = au_readl(SYS_FREQCTRL1);
+ sleep_sys_clocks[2] = au_readl(SYS_CLKSRC);
+ sleep_sys_clocks[3] = au_readl(SYS_CPUPLL);
+ sleep_sys_clocks[4] = au_readl(SYS_AUXPLL);
- /*
- * We don't really need to do this one, but unless we
- * write it again it won't have a valid value if we
- * happen to read it.
- */
- sleep_cpu_pll_cntrl = au_readl(SYS_CPUPLL);
-
- sleep_pin_function = au_readl(SYS_PINFUNC);
+ /* pin mux config */
+ sleep_sys_pinfunc = au_readl(SYS_PINFUNC);
/* Save the static memory controller configuration. */
sleep_static_memctlr[0][0] = au_readl(MEM_STCFG0);
@@ -151,12 +160,37 @@
static void restore_core_regs(void)
{
- extern void restore_au1xxx_intctl(void);
- extern void wakeup_counter0_adjust(void);
+ /* restore clock configuration. Writing CPUPLL last will
+ * stall a bit and stabilize other clocks (unless this is
+ * one of those Au1000 with a write-only PLL, where we dont
+ * have a valid value)
+ */
+ au_writel(sleep_sys_clocks[0], SYS_FREQCTRL0);
+ au_writel(sleep_sys_clocks[1], SYS_FREQCTRL1);
+ au_writel(sleep_sys_clocks[2], SYS_CLKSRC);
+ au_writel(sleep_sys_clocks[4], SYS_AUXPLL);
+ if (!au1xxx_cpu_has_pll_wo())
+ au_writel(sleep_sys_clocks[3], SYS_CPUPLL);
+ au_sync();
- au_writel(sleep_aux_pll_cntrl, SYS_AUXPLL); au_sync();
- au_writel(sleep_cpu_pll_cntrl, SYS_CPUPLL); au_sync();
- au_writel(sleep_pin_function, SYS_PINFUNC); au_sync();
+ au_writel(sleep_sys_pinfunc, SYS_PINFUNC);
+ au_sync();
+
+#ifndef CONFIG_SOC_AU1200
+ au_writel(sleep_usb[0], USB_HOST_CONFIG);
+ au_writel(sleep_usb[1], USBD_ENABLE);
+ au_sync();
+#else
+ /* enable accces to OTG memory */
+ au_writel(au_readl(USB_MSR_BASE + 4) | (1 << 6), USB_MSR_BASE + 4);
+ au_sync();
+
+ /* restore OTG caps and port mux. */
+ au_writel(sleep_usb[0], 0xb4020020 + 0); /* OTG_CAP */
+ au_sync();
+ au_writel(sleep_usb[1], 0xb4020020 + 4); /* OTG_MUX */
+ au_sync();
+#endif
/* Restore the static memory controller configuration. */
au_writel(sleep_static_memctlr[0][0], MEM_STCFG0);
@@ -196,16 +230,45 @@
suspend_mode = 0;
}
-int au_sleep(void)
+void au_sleep(void)
+{
+ save_core_regs();
+ au1xxx_save_and_sleep();
+ restore_core_regs();
+}
+
+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;
- extern void save_and_sleep(void);
+ int ret;
+#ifdef SLEEP_TEST_TIMEOUT
+#define TMPBUFLEN2 16
+ char buf[TMPBUFLEN2], *p;
+#endif
spin_lock_irqsave(&pm_lock, flags);
- save_core_regs();
+ if (!write) {
+ *len = 0;
+ ret = 0;
+ goto out_unlock;
+ };
- flush_cache_all();
+#ifdef SLEEP_TEST_TIMEOUT
+ if (*len > TMPBUFLEN2 - 1) {
+ ret = -EFAULT;
+ goto out_unlock;
+ }
+ if (copy_from_user(buf, buffer, *len)) {
+ return -EFAULT;
+ goto out_unlock;
+ }
+ buf[*len] = 0;
+ p = buf;
+ sleep_ticks = simple_strtoul(p, &p, 0);
+ wakeup_counter0_set(sleep_ticks);
+#endif
/**
** The code below is all system dependent and we should probably
@@ -223,9 +286,6 @@
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
@@ -234,41 +294,62 @@
au_writel(wakeup, SYS_WAKEMSK);
au_sync();
- save_and_sleep();
+ au_sleep();
+ ret = 0;
- /*
- * 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();
+out_unlock:
spin_unlock_irqrestore(&pm_lock, flags);
- return 0;
+ return ret;
}
-static int pm_do_sleep(ctl_table *ctl, int write, struct file *file,
- void __user *buffer, size_t *len, loff_t *ppos)
+#if !defined(CONFIG_SOC_AU1200) && !defined(CONFIG_SOC_AU1550)
+
+/*
+ * 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)
{
-#ifdef SLEEP_TEST_TIMEOUT
-#define TMPBUFLEN2 16
- char buf[TMPBUFLEN2], *p;
-#endif
+ unsigned long ticks, loopbit;
+ int lps_precision = LPS_PREC;
- 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
+ loops_per_jiffy = 1 << 12;
- au_sleep();
+ 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;
}
- return 0;
+
+ /*
+ * 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,
@@ -377,7 +458,7 @@
return retval;
}
-
+#endif
static struct ctl_table pm_table[] = {
{
@@ -388,6 +469,7 @@
.mode = 0600,
.proc_handler = &pm_do_sleep
},
+#if !defined(CONFIG_SOC_AU1200) && !defined(CONFIG_SOC_AU1550)
{
.ctl_name = CTL_UNNUMBERED,
.procname = "freq",
@@ -396,6 +478,7 @@
.mode = 0600,
.proc_handler = &pm_do_freq
},
+#endif
{}
};
@@ -429,51 +512,4 @@
__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 */