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-rw-r--r--arch/mips/alchemy/common/power.c409
1 files changed, 39 insertions, 370 deletions
diff --git a/arch/mips/alchemy/common/power.c b/arch/mips/alchemy/common/power.c
index bd854a6d1d8..bdb28dee8fd 100644
--- a/arch/mips/alchemy/common/power.c
+++ b/arch/mips/alchemy/common/power.c
@@ -29,32 +29,13 @@
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#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);
-
/*
* We need to save/restore a bunch of core registers that are
* either volatile or reset to some state across a processor sleep.
@@ -65,71 +46,22 @@ static DEFINE_SPINLOCK(pm_lock);
* 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_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
- * 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;
-void wakeup_counter0_set(int ticks);
-#endif
static void save_core_regs(void)
{
- extern void save_au1xxx_intctl(void);
- extern void pm_eth0_shutdown(void);
-
- /*
- * Do the serial ports.....these really should be a pm_*
- * registered function by the driver......but of course the
- * standard serial driver doesn't understand our Au1xxx
- * unique registers.
- */
- sleep_uart0_inten = au_readl(UART0_ADDR + UART_IER);
- sleep_uart0_fifoctl = au_readl(UART0_ADDR + UART_FCR);
- 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);
-
- /* Shutdown USB host/device. */
- sleep_usbhost_enable = 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();
-
- sleep_usbdev_enable = au_readl(USBD_ENABLE);
- au_writel(0, USBD_ENABLE); au_sync();
-
- /* Save interrupt controller state. */
- save_au1xxx_intctl();
-
/* Clocks and PLLs. */
- sleep_aux_pll_cntrl = 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_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);
- 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);
@@ -148,12 +80,21 @@ static void save_core_regs(void)
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();
/* Restore the static memory controller configuration. */
au_writel(sleep_static_memctlr[0][0], MEM_STCFG0);
@@ -168,298 +109,26 @@ static void restore_core_regs(void)
au_writel(sleep_static_memctlr[3][0], MEM_STCFG3);
au_writel(sleep_static_memctlr[3][1], MEM_STTIME3);
au_writel(sleep_static_memctlr[3][2], MEM_STADDR3);
-
- /*
- * Enable the UART if it was enabled before sleep.
- * I guess I should define module control bits........
- */
- if (sleep_uart0_enable & 0x02) {
- au_writel(0, UART0_ADDR + UART_MOD_CNTRL); au_sync();
- au_writel(1, UART0_ADDR + UART_MOD_CNTRL); au_sync();
- au_writel(3, UART0_ADDR + UART_MOD_CNTRL); au_sync();
- au_writel(sleep_uart0_inten, UART0_ADDR + UART_IER); au_sync();
- au_writel(sleep_uart0_fifoctl, UART0_ADDR + UART_FCR); au_sync();
- au_writel(sleep_uart0_linectl, UART0_ADDR + UART_LCR); au_sync();
- au_writel(sleep_uart0_clkdiv, UART0_ADDR + UART_CLK); au_sync();
- }
-
- restore_au1xxx_intctl();
- wakeup_counter0_adjust();
-}
-
-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)
-{
- 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;
+ switch (alchemy_get_cputype()) {
+ case ALCHEMY_CPU_AU1000:
+ case ALCHEMY_CPU_AU1500:
+ case ALCHEMY_CPU_AU1100:
+ alchemy_sleep_au1000();
+ break;
+ case ALCHEMY_CPU_AU1550:
+ case ALCHEMY_CPU_AU1200:
+ alchemy_sleep_au1550();
+ break;
+ case ALCHEMY_CPU_AU1300:
+ alchemy_sleep_au1300();
+ 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;
- }
+ restore_core_regs();
}
-#endif /* CONFIG_PM */
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