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ARM: tegra: add support for tegra30 interrupts 

Tegra30 has 1 extra legacy interrupt controller. Use the GIC ITLinesNumber
field to determine how many interrupt controllers we have and initialize
appropriately. Also make room for the extra tegra30 interrupts by moving
the GPIO IRQ base. This shouldn't affect existing code as it determines the
correct IRQ number for GPIOs using TEGRA_GPIO_TO_IRQ().

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Colin Cross <ccross@android.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Peter De Schrijver 2012-01-05 03:31:45 +00:00 committed by Olof Johansson
parent 62aa2b537c
commit caa4868ee0
3 changed files with 23 additions and 7 deletions
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3
arch/arm/mach-tegra/include/mach/iomap.h
View File

@ -74,6 +74,9 @@
#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

7
arch/arm/mach-tegra/include/mach/irqs.h
View File

@ -165,11 +165,12 @@
#define INT_QUAD_RES_30 (INT_QUAD_BASE + 30)
#define INT_QUAD_RES_31 (INT_QUAD_BASE + 31)
#define INT_MAIN_NR (INT_QUAD_BASE + 32 - INT_PRI_BASE)
/* Tegra30 has 5 banks of 32 IRQs */
#define INT_MAIN_NR (32 * 5)
#define INT_GPIO_BASE (INT_PRI_BASE + INT_MAIN_NR)
#define INT_GPIO_NR (28 * 8)
/* Tegra30 has 8 banks of 32 GPIOs */
#define INT_GPIO_NR (32 * 8)
#define TEGRA_NR_IRQS (INT_GPIO_BASE + INT_GPIO_NR)

20
arch/arm/mach-tegra/irq.c
View File

@ -44,14 +44,16 @@
#define ICTLR_COP_IER_CLR 0x38
#define ICTLR_COP_IEP_CLASS 0x3c
#define NUM_ICTLRS 4
#define FIRST_LEGACY_IRQ 32
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),
};
static inline void tegra_irq_write_mask(unsigned int irq, unsigned long reg)
@ -60,7 +62,7 @@ static inline void tegra_irq_write_mask(unsigned int irq, unsigned long reg)
u32 mask;
BUG_ON(irq < FIRST_LEGACY_IRQ ||
irq >= FIRST_LEGACY_IRQ + NUM_ICTLRS * 32);
irq >= FIRST_LEGACY_IRQ + num_ictlrs * 32);
base = ictlr_reg_base[(irq - FIRST_LEGACY_IRQ) / 32];
mask = BIT((irq - FIRST_LEGACY_IRQ) % 32);
@ -113,8 +115,18 @@ static int tegra_retrigger(struct irq_data *d)
void __init tegra_init_irq(void)
{
int i;
void __iomem *distbase;
for (i = 0; i < NUM_ICTLRS; i++) {
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);
@ -131,6 +143,6 @@ void __init tegra_init_irq(void)
* initialized elsewhere under DT.
*/
if (!of_have_populated_dt())
gic_init(0, 29, IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE),
gic_init(0, 29, distbase,
IO_ADDRESS(TEGRA_ARM_PERIF_BASE + 0x100));
}