Use a sysdev to implement PM methods for the Au1000 interrupt controllers.
Signed-off-by: Manuel Lauss <manuel.lauss@xxxxxxxxx>
---
v5: an older patch slipped in for v4
v4: need slab.h for kzalloc
v3: fix odd formatting
v2: register a sysdev for each of the 2 controllers (instead of a single one
handling both).
arch/mips/alchemy/common/irq.c | 174 ++++++++++++++-------------
arch/mips/alchemy/common/power.c | 5 -
arch/mips/include/asm/mach-au1x00/au1000.h | 34 +++++-
3 files changed, 122 insertions(+), 91 deletions(-)
diff --git a/arch/mips/alchemy/common/irq.c b/arch/mips/alchemy/common/irq.c
index b2821ac..9f78ada 100644
--- a/arch/mips/alchemy/common/irq.c
+++ b/arch/mips/alchemy/common/irq.c
@@ -29,6 +29,8 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/sysdev.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
@@ -216,90 +218,6 @@ struct au1xxx_irqmap au1200_irqmap[] __initdata = {
};
-#ifdef CONFIG_PM
-
-/*
- * Save/restore the interrupt controller state.
- * Called from the save/restore core registers as part of the
- * au_sleep function in power.c.....maybe I should just pm_register()
- * them instead?
- */
-static unsigned int sleep_intctl_config0[2];
-static unsigned int sleep_intctl_config1[2];
-static unsigned int sleep_intctl_config2[2];
-static unsigned int sleep_intctl_src[2];
-static unsigned int sleep_intctl_assign[2];
-static unsigned int sleep_intctl_wake[2];
-static unsigned int sleep_intctl_mask[2];
-
-void save_au1xxx_intctl(void)
-{
- sleep_intctl_config0[0] = au_readl(IC0_CFG0RD);
- sleep_intctl_config1[0] = au_readl(IC0_CFG1RD);
- sleep_intctl_config2[0] = au_readl(IC0_CFG2RD);
- sleep_intctl_src[0] = au_readl(IC0_SRCRD);
- sleep_intctl_assign[0] = au_readl(IC0_ASSIGNRD);
- sleep_intctl_wake[0] = au_readl(IC0_WAKERD);
- sleep_intctl_mask[0] = au_readl(IC0_MASKRD);
-
- sleep_intctl_config0[1] = au_readl(IC1_CFG0RD);
- sleep_intctl_config1[1] = au_readl(IC1_CFG1RD);
- sleep_intctl_config2[1] = au_readl(IC1_CFG2RD);
- sleep_intctl_src[1] = au_readl(IC1_SRCRD);
- sleep_intctl_assign[1] = au_readl(IC1_ASSIGNRD);
- sleep_intctl_wake[1] = au_readl(IC1_WAKERD);
- sleep_intctl_mask[1] = au_readl(IC1_MASKRD);
-}
-
-/*
- * For most restore operations, we clear the entire register and
- * then set the bits we found during the save.
- */
-void restore_au1xxx_intctl(void)
-{
- au_writel(0xffffffff, IC0_MASKCLR); au_sync();
-
- au_writel(0xffffffff, IC0_CFG0CLR); au_sync();
- au_writel(sleep_intctl_config0[0], IC0_CFG0SET); au_sync();
- au_writel(0xffffffff, IC0_CFG1CLR); au_sync();
- au_writel(sleep_intctl_config1[0], IC0_CFG1SET); au_sync();
- au_writel(0xffffffff, IC0_CFG2CLR); au_sync();
- au_writel(sleep_intctl_config2[0], IC0_CFG2SET); au_sync();
- au_writel(0xffffffff, IC0_SRCCLR); au_sync();
- au_writel(sleep_intctl_src[0], IC0_SRCSET); au_sync();
- au_writel(0xffffffff, IC0_ASSIGNCLR); au_sync();
- au_writel(sleep_intctl_assign[0], IC0_ASSIGNSET); au_sync();
- au_writel(0xffffffff, IC0_WAKECLR); au_sync();
- au_writel(sleep_intctl_wake[0], IC0_WAKESET); au_sync();
- au_writel(0xffffffff, IC0_RISINGCLR); au_sync();
- au_writel(0xffffffff, IC0_FALLINGCLR); au_sync();
- au_writel(0x00000000, IC0_TESTBIT); au_sync();
-
- au_writel(0xffffffff, IC1_MASKCLR); au_sync();
-
- au_writel(0xffffffff, IC1_CFG0CLR); au_sync();
- au_writel(sleep_intctl_config0[1], IC1_CFG0SET); au_sync();
- au_writel(0xffffffff, IC1_CFG1CLR); au_sync();
- au_writel(sleep_intctl_config1[1], IC1_CFG1SET); au_sync();
- au_writel(0xffffffff, IC1_CFG2CLR); au_sync();
- au_writel(sleep_intctl_config2[1], IC1_CFG2SET); au_sync();
- au_writel(0xffffffff, IC1_SRCCLR); au_sync();
- au_writel(sleep_intctl_src[1], IC1_SRCSET); au_sync();
- au_writel(0xffffffff, IC1_ASSIGNCLR); au_sync();
- au_writel(sleep_intctl_assign[1], IC1_ASSIGNSET); au_sync();
- au_writel(0xffffffff, IC1_WAKECLR); au_sync();
- au_writel(sleep_intctl_wake[1], IC1_WAKESET); au_sync();
- au_writel(0xffffffff, IC1_RISINGCLR); au_sync();
- au_writel(0xffffffff, IC1_FALLINGCLR); au_sync();
- au_writel(0x00000000, IC1_TESTBIT); au_sync();
-
- au_writel(sleep_intctl_mask[1], IC1_MASKSET); au_sync();
-
- au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
-}
-#endif /* CONFIG_PM */
-
-
static void au1x_ic0_unmask(unsigned int irq_nr)
{
unsigned int bit = irq_nr - AU1000_INTC0_INT_BASE;
@@ -635,3 +553,91 @@ void __init arch_init_irq(void)
break;
}
}
+
+struct alchemy_ic_sysdev {
+ struct sys_device sysdev;
+ void __iomem *base;
+ unsigned long pmdata[7];
+};
+
+static int alchemy_ic_suspend(struct sys_device *dev, pm_message_t state)
+{
+ struct alchemy_ic_sysdev *icdev =
+ container_of(dev, struct alchemy_ic_sysdev, sysdev);
+
+ icdev->pmdata[0] = __raw_readl(icdev->base + IC_CFG0RD);
+ icdev->pmdata[1] = __raw_readl(icdev->base + IC_CFG1RD);
+ icdev->pmdata[2] = __raw_readl(icdev->base + IC_CFG2RD);
+ icdev->pmdata[3] = __raw_readl(icdev->base + IC_SRCRD);
+ icdev->pmdata[4] = __raw_readl(icdev->base + IC_ASSIGNRD);
+ icdev->pmdata[5] = __raw_readl(icdev->base + IC_WAKERD);
+ icdev->pmdata[6] = __raw_readl(icdev->base + IC_MASKRD);
+
+ return 0;
+}
+
+static int alchemy_ic_resume(struct sys_device *dev)
+{
+ struct alchemy_ic_sysdev *icdev =
+ container_of(dev, struct alchemy_ic_sysdev, sysdev);
+
+ __raw_writel(0xffffffff, icdev->base + IC_MASKCLR);
+ __raw_writel(0xffffffff, icdev->base + IC_CFG0CLR);
+ __raw_writel(0xffffffff, icdev->base + IC_CFG1CLR);
+ __raw_writel(0xffffffff, icdev->base + IC_CFG2CLR);
+ __raw_writel(0xffffffff, icdev->base + IC_SRCCLR);
+ __raw_writel(0xffffffff, icdev->base + IC_ASSIGNCLR);
+ __raw_writel(0xffffffff, icdev->base + IC_WAKECLR);
+ __raw_writel(0xffffffff, icdev->base + IC_RISINGCLR);
+ __raw_writel(0xffffffff, icdev->base + IC_FALLINGCLR);
+ __raw_writel(0x00000000, icdev->base + IC_TESTBIT);
+ wmb();
+ __raw_writel(icdev->pmdata[0], icdev->base + IC_CFG0SET);
+ __raw_writel(icdev->pmdata[1], icdev->base + IC_CFG1SET);
+ __raw_writel(icdev->pmdata[2], icdev->base + IC_CFG2SET);
+ __raw_writel(icdev->pmdata[3], icdev->base + IC_SRCSET);
+ __raw_writel(icdev->pmdata[4], icdev->base + IC_ASSIGNSET);
+ __raw_writel(icdev->pmdata[5], icdev->base + IC_WAKESET);
+ wmb();
+
+ __raw_writel(icdev->pmdata[6], icdev->base + IC_MASKSET);
+ wmb();
+
+ return 0;
+}
+
+static struct sysdev_class alchemy_ic_sysdev_class = {
+ .name = "ic",
+ .suspend = alchemy_ic_suspend,
+ .resume = alchemy_ic_resume,
+};
+
+static int __init alchemy_ic_sysdev_init(void)
+{
+ struct alchemy_ic_sysdev *icdev;
+ unsigned long icbase[2] = { IC0_PHYS_ADDR, IC1_PHYS_ADDR };
+ int err, i;
+
+ err = sysdev_class_register(&alchemy_ic_sysdev_class);
+ if (err)
+ return err;
+
+ for (i = 0; i < 2; i++) {
+ icdev = kzalloc(sizeof(struct alchemy_ic_sysdev), GFP_KERNEL);
+ if (!icdev)
+ return -ENOMEM;
+
+ icdev->base = ioremap(icbase[i], 0x1000);
+
+ icdev->sysdev.id = i;
+ icdev->sysdev.cls = &alchemy_ic_sysdev_class;
+ err = sysdev_register(&icdev->sysdev);
+ if (err) {
+ kfree(icdev);
+ return err;
+ }
+ }
+
+ return 0;
+}
+device_initcall(alchemy_ic_sysdev_init);
diff --git a/arch/mips/alchemy/common/power.c b/arch/mips/alchemy/common/power.c
index c07101c..e097094 100644
--- a/arch/mips/alchemy/common/power.c
+++ b/arch/mips/alchemy/common/power.c
@@ -106,9 +106,6 @@ static void save_core_regs(void)
sleep_usb[1] = au_readl(0xb4020024); /* OTG_MUX */
#endif
- /* Save interrupt controller state. */
- save_au1xxx_intctl();
-
/* Clocks and PLLs. */
sleep_sys_clocks[0] = au_readl(SYS_FREQCTRL0);
sleep_sys_clocks[1] = au_readl(SYS_FREQCTRL1);
@@ -200,8 +197,6 @@ static void restore_core_regs(void)
au_writel(sleep_uart0_clkdiv, UART0_ADDR + UART_CLK); au_sync();
}
- restore_au1xxx_intctl();
-
#if defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200)
au1xxx_dbdma_resume();
#endif
diff --git a/arch/mips/include/asm/mach-au1x00/au1000.h b/arch/mips/include/asm/mach-au1x00/au1000.h
index cb91714..a697661 100644
--- a/arch/mips/include/asm/mach-au1x00/au1000.h
+++ b/arch/mips/include/asm/mach-au1x00/au1000.h
@@ -191,8 +191,6 @@ extern unsigned long au1xxx_calc_clock(void);
void alchemy_sleep_au1000(void);
void alchemy_sleep_au1550(void);
void au_sleep(void);
-void save_au1xxx_intctl(void);
-void restore_au1xxx_intctl(void);
/* SOC Interrupt numbers */
@@ -836,6 +834,38 @@ enum soc_au1200_ints {
#define MEM_STNAND_DATA 0x20
#endif
+
+/* Interrupt Controller register offsets */
+#define IC_CFG0RD 0x40
+#define IC_CFG0SET 0x40
+#define IC_CFG0CLR 0x44
+#define IC_CFG1RD 0x48
+#define IC_CFG1SET 0x48
+#define IC_CFG1CLR 0x4C
+#define IC_CFG2RD 0x50
+#define IC_CFG2SET 0x50
+#define IC_CFG2CLR 0x54
+#define IC_REQ0INT 0x54
+#define IC_SRCRD 0x58
+#define IC_SRCSET 0x58
+#define IC_SRCCLR 0x5C
+#define IC_REQ1INT 0x5C
+#define IC_ASSIGNRD 0x60
+#define IC_ASSIGNSET 0x60
+#define IC_ASSIGNCLR 0x64
+#define IC_WAKERD 0x68
+#define IC_WAKESET 0x68
+#define IC_WAKECLR 0x6C
+#define IC_MASKRD 0x70
+#define IC_MASKSET 0x70
+#define IC_MASKCLR 0x74
+#define IC_RISINGRD 0x78
+#define IC_RISINGCLR 0x78
+#define IC_FALLINGRD 0x7C
+#define IC_FALLINGCLR 0x7C
+#define IC_TESTBIT 0x80
+
+
/* Interrupt Controller 0 */
#define IC0_CFG0RD 0xB0400040
#define IC0_CFG0SET 0xB0400040
--
1.7.0.4
