ARM: tegra: remove old LIC support

Now that all DTs have been updated, entierely drop support for
the non-DT code.

This is likely to break platforms that do not update their DT,
so print a warning at boot time.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1426088583-15097-7-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

3 files changed, 2 insertions, 220 deletions

diff --git a/arch/arm/mach-tegra/iomap.h b/arch/arm/mach-tegra/iomap.h
index ee79808e93a3..81dc950b4881 100644
--- a/arch/arm/mach-tegra/iomap.h
+++ b/arch/arm/mach-tegra/iomap.h
@@ -31,21 +31,6 @@
 #define TEGRA_ARM_INT_DIST_BASE         0x50041000
 #define TEGRA_ARM_INT_DIST_SIZE         SZ_4K
 
-#define TEGRA_PRIMARY_ICTLR_BASE        0x60004000
-#define TEGRA_PRIMARY_ICTLR_SIZE        SZ_64
-
-#define TEGRA_SECONDARY_ICTLR_BASE      0x60004100
-#define TEGRA_SECONDARY_ICTLR_SIZE      SZ_64
-
-#define TEGRA_TERTIARY_ICTLR_BASE       0x60004200
-#define TEGRA_TERTIARY_ICTLR_SIZE       SZ_64
-
-#define TEGRA_QUATERNARY_ICTLR_BASE     0x60004300
-#define TEGRA_QUATERNARY_ICTLR_SIZE     SZ_64
-
-#define TEGRA_QUINARY_ICTLR_BASE        0x60004400
-#define TEGRA_QUINARY_ICTLR_SIZE        SZ_64
-
 #define TEGRA_TMR1_BASE                 0x60005000
 #define TEGRA_TMR1_SIZE                 SZ_8
 
diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index 1593c4c8b7f0..3b9098d27ea5 100644
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@@ -30,43 +30,9 @@
 #include "board.h"
 #include "iomap.h"
 
-#define ICTLR_CPU_IEP_VFIQ      0x08
-#define ICTLR_CPU_IEP_FIR       0x14
-#define ICTLR_CPU_IEP_FIR_SET   0x18
-#define ICTLR_CPU_IEP_FIR_CLR   0x1c
-
-#define ICTLR_CPU_IER           0x20
-#define ICTLR_CPU_IER_SET       0x24
-#define ICTLR_CPU_IER_CLR       0x28
-#define ICTLR_CPU_IEP_CLASS     0x2C
-
-#define ICTLR_COP_IER           0x30
-#define ICTLR_COP_IER_SET       0x34
-#define ICTLR_COP_IER_CLR       0x38
-#define ICTLR_COP_IEP_CLASS     0x3c
-
-#define FIRST_LEGACY_IRQ 32
-#define TEGRA_MAX_NUM_ICTLRS    5
-
 #define SGI_MASK 0xFFFF
 
-static int num_ictlrs;
-
-static void __iomem *ictlr_reg_base[] = {
-        IO_ADDRESS(TEGRA_PRIMARY_ICTLR_BASE),
-        IO_ADDRESS(TEGRA_SECONDARY_ICTLR_BASE),
-        IO_ADDRESS(TEGRA_TERTIARY_ICTLR_BASE),
-        IO_ADDRESS(TEGRA_QUATERNARY_ICTLR_BASE),
-        IO_ADDRESS(TEGRA_QUINARY_ICTLR_BASE),
-};
-
 #ifdef CONFIG_PM_SLEEP
-static u32 cop_ier[TEGRA_MAX_NUM_ICTLRS];
-static u32 cop_iep[TEGRA_MAX_NUM_ICTLRS];
-static u32 cpu_ier[TEGRA_MAX_NUM_ICTLRS];
-static u32 cpu_iep[TEGRA_MAX_NUM_ICTLRS];
-
-static u32 ictlr_wake_mask[TEGRA_MAX_NUM_ICTLRS];
 static void __iomem *tegra_gic_cpu_base;
 #endif
 
@@ -83,140 +49,7 @@ bool tegra_pending_sgi(void)
         return false;
 }
 
-static inline void tegra_irq_write_mask(unsigned int irq, unsigned long reg)
-{
-        void __iomem *base;
-        u32 mask;
-
-        BUG_ON(irq < FIRST_LEGACY_IRQ ||
-                irq >= FIRST_LEGACY_IRQ + num_ictlrs * 32);
-
-        base = ictlr_reg_base[(irq - FIRST_LEGACY_IRQ) / 32];
-        mask = BIT((irq - FIRST_LEGACY_IRQ) % 32);
-
-        __raw_writel(mask, base + reg);
-}
-
-static void tegra_mask(struct irq_data *d)
-{
-        if (d->hwirq < FIRST_LEGACY_IRQ)
-                return;
-
-        tegra_irq_write_mask(d->hwirq, ICTLR_CPU_IER_CLR);
-}
-
-static void tegra_unmask(struct irq_data *d)
-{
-        if (d->hwirq < FIRST_LEGACY_IRQ)
-                return;
-
-        tegra_irq_write_mask(d->hwirq, ICTLR_CPU_IER_SET);
-}
-
-static void tegra_ack(struct irq_data *d)
-{
-        if (d->hwirq < FIRST_LEGACY_IRQ)
-                return;
-
-        tegra_irq_write_mask(d->hwirq, ICTLR_CPU_IEP_FIR_CLR);
-}
-
-static void tegra_eoi(struct irq_data *d)
-{
-        if (d->hwirq < FIRST_LEGACY_IRQ)
-                return;
-
-        tegra_irq_write_mask(d->hwirq, ICTLR_CPU_IEP_FIR_CLR);
-}
-
-static int tegra_retrigger(struct irq_data *d)
-{
-        if (d->hwirq < FIRST_LEGACY_IRQ)
-                return 0;
-
-        tegra_irq_write_mask(d->hwirq, ICTLR_CPU_IEP_FIR_SET);
-
-        return 1;
-}
-
 #ifdef CONFIG_PM_SLEEP
-static int tegra_set_wake(struct irq_data *d, unsigned int enable)
-{
-        u32 irq = d->hwirq;
-        u32 index, mask;
-
-        if (irq < FIRST_LEGACY_IRQ ||
-                irq >= FIRST_LEGACY_IRQ + num_ictlrs * 32)
-                return -EINVAL;
-
-        index = ((irq - FIRST_LEGACY_IRQ) / 32);
-        mask = BIT((irq - FIRST_LEGACY_IRQ) % 32);
-        if (enable)
-                ictlr_wake_mask[index] |= mask;
-        else
-                ictlr_wake_mask[index] &= ~mask;
-
-        return 0;
-}
-
-static int tegra_legacy_irq_suspend(void)
-{
-        unsigned long flags;
-        int i;
-
-        local_irq_save(flags);
-        for (i = 0; i < num_ictlrs; i++) {
-                void __iomem *ictlr = ictlr_reg_base[i];
-                /* Save interrupt state */
-                cpu_ier[i] = readl_relaxed(ictlr + ICTLR_CPU_IER);
-                cpu_iep[i] = readl_relaxed(ictlr + ICTLR_CPU_IEP_CLASS);
-                cop_ier[i] = readl_relaxed(ictlr + ICTLR_COP_IER);
-                cop_iep[i] = readl_relaxed(ictlr + ICTLR_COP_IEP_CLASS);
-
-                /* Disable COP interrupts */
-                writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
-
-                /* Disable CPU interrupts */
-                writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
-
-                /* Enable the wakeup sources of ictlr */
-                writel_relaxed(ictlr_wake_mask[i], ictlr + ICTLR_CPU_IER_SET);
-        }
-        local_irq_restore(flags);
-
-        return 0;
-}
-
-static void tegra_legacy_irq_resume(void)
-{
-        unsigned long flags;
-        int i;
-
-        local_irq_save(flags);
-        for (i = 0; i < num_ictlrs; i++) {
-                void __iomem *ictlr = ictlr_reg_base[i];
-                writel_relaxed(cpu_iep[i], ictlr + ICTLR_CPU_IEP_CLASS);
-                writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
-                writel_relaxed(cpu_ier[i], ictlr + ICTLR_CPU_IER_SET);
-                writel_relaxed(cop_iep[i], ictlr + ICTLR_COP_IEP_CLASS);
-                writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
-                writel_relaxed(cop_ier[i], ictlr + ICTLR_COP_IER_SET);
-        }
-        local_irq_restore(flags);
-}
-
-static struct syscore_ops tegra_legacy_irq_syscore_ops = {
-        .suspend = tegra_legacy_irq_suspend,
-        .resume = tegra_legacy_irq_resume,
-};
-
-int tegra_legacy_irq_syscore_init(void)
-{
-        register_syscore_ops(&tegra_legacy_irq_syscore_ops);
-
-        return 0;
-}
-
 static int tegra_gic_notifier(struct notifier_block *self,
                               unsigned long cmd, void *v)
 {
@@ -251,7 +84,6 @@ static void tegra114_gic_cpu_pm_registration(void)
         cpu_pm_register_notifier(&tegra_gic_notifier_block);
 }
 #else
-#define tegra_set_wake NULL
 static void tegra114_gic_cpu_pm_registration(void) { }
 #endif
 
@@ -263,37 +95,8 @@ static const struct of_device_id tegra_ictlr_match[] __initconst = {
 
 void __init tegra_init_irq(void)
 {
-        int i;
-        void __iomem *distbase;
-
-        if (of_find_matching_node(NULL, tegra_ictlr_match))
-                goto skip_extn_setup;
-
-        tegra_legacy_irq_syscore_init();
-
-        distbase = IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE);
-        num_ictlrs = readl_relaxed(distbase + GIC_DIST_CTR) & 0x1f;
-
-        if (num_ictlrs > ARRAY_SIZE(ictlr_reg_base)) {
-                WARN(1, "Too many (%d) interrupt controllers found. Maximum is %d.",
-                        num_ictlrs, ARRAY_SIZE(ictlr_reg_base));
-                num_ictlrs = ARRAY_SIZE(ictlr_reg_base);
-        }
-
-        for (i = 0; i < num_ictlrs; i++) {
-                void __iomem *ictlr = ictlr_reg_base[i];
-                writel(~0, ictlr + ICTLR_CPU_IER_CLR);
-                writel(0, ictlr + ICTLR_CPU_IEP_CLASS);
-        }
-
-        gic_arch_extn.irq_ack = tegra_ack;
-        gic_arch_extn.irq_eoi = tegra_eoi;
-        gic_arch_extn.irq_mask = tegra_mask;
-        gic_arch_extn.irq_unmask = tegra_unmask;
-        gic_arch_extn.irq_retrigger = tegra_retrigger;
-        gic_arch_extn.irq_set_wake = tegra_set_wake;
-        gic_arch_extn.flags = IRQCHIP_MASK_ON_SUSPEND;
+        if (WARN_ON(!of_find_matching_node(NULL, tegra_ictlr_match)))
+                pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
 
-skip_extn_setup:
         tegra114_gic_cpu_pm_registration();
 }
diff --git a/arch/arm/mach-tegra/irq.h b/arch/arm/mach-tegra/irq.h
index bc05ce5613fb..5142649bba05 100644
--- a/arch/arm/mach-tegra/irq.h
+++ b/arch/arm/mach-tegra/irq.h
@@ -19,10 +19,4 @@
 
 bool tegra_pending_sgi(void);
 
-#ifdef CONFIG_PM_SLEEP
-int tegra_legacy_irq_syscore_init(void);
-#else
-static inline int tegra_legacy_irq_syscore_init(void) { return 0; }
-#endif
-
 #endif