diff options
Diffstat (limited to 'drivers/video/tegra/host/host1x/host1x_intr.c')
| -rw-r--r-- | drivers/video/tegra/host/host1x/host1x_intr.c | 77 |
1 files changed, 62 insertions, 15 deletions
diff --git a/drivers/video/tegra/host/host1x/host1x_intr.c b/drivers/video/tegra/host/host1x/host1x_intr.c index 47e984e2943e..2b611faaa708 100644 --- a/drivers/video/tegra/host/host1x/host1x_intr.c +++ b/drivers/video/tegra/host/host1x/host1x_intr.c @@ -3,6 +3,7 @@ * * Tegra Graphics Host Interrupt Management * + * Copyright (C) 2010 Google, Inc. * Copyright (c) 2010-2012, NVIDIA Corporation. * * This program is free software; you can redistribute it and/or modify it @@ -20,18 +21,69 @@ #include <linux/interrupt.h> #include <linux/irq.h> +#include <linux/io.h> +#include <asm/mach/irq.h> #include "nvhost_intr.h" #include "dev.h" #include "host1x_hardware.h" - /*** HW host sync management ***/ +static void syncpt_thresh_mask(struct irq_data *data) +{ + (void)data; +} + +static void syncpt_thresh_unmask(struct irq_data *data) +{ + (void)data; +} + +static void syncpt_thresh_cascade(unsigned int irq, struct irq_desc *desc) +{ + void __iomem *sync_regs = irq_desc_get_handler_data(desc); + unsigned long reg; + int id; + struct irq_chip *chip = irq_desc_get_chip(desc); + + chained_irq_enter(chip, desc); + + reg = readl(sync_regs + HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS); + + for_each_set_bit(id, ®, 32) + generic_handle_irq(id + INT_SYNCPT_THRESH_BASE); + + chained_irq_exit(chip, desc); +} + +static struct irq_chip syncpt_thresh_irq = { + .name = "syncpt", + .irq_mask = syncpt_thresh_mask, + .irq_unmask = syncpt_thresh_unmask +}; + static void t20_intr_init_host_sync(struct nvhost_intr *intr) { struct nvhost_master *dev = intr_to_dev(intr); void __iomem *sync_regs = dev->sync_aperture; + int i, irq; + + writel(0xffffffffUL, + sync_regs + HOST1X_SYNC_SYNCPT_THRESH_INT_DISABLE); + writel(0xffffffffUL, + sync_regs + HOST1X_SYNC_SYNCPT_THRESH_CPU0_INT_STATUS); + + for (i = 0; i < INT_SYNCPT_THRESH_NR; i++) { + irq = INT_SYNCPT_THRESH_BASE + i; + irq_set_chip_and_handler(irq, &syncpt_thresh_irq, + handle_simple_irq); + irq_set_chip_data(irq, sync_regs); + set_irq_flags(irq, IRQF_VALID); + } + irq_set_chained_handler(INT_HOST1X_MPCORE_SYNCPT, + syncpt_thresh_cascade); + irq_set_handler_data(INT_HOST1X_MPCORE_SYNCPT, sync_regs); /* disable the ip_busy_timeout. this prevents write drops, etc. * there's no real way to recover from a hung client anyway. */ @@ -198,21 +250,16 @@ static int t20_request_syncpt_irq(struct nvhost_intr_syncpt *syncpt) return 0; } -int nvhost_init_t20_intr_support(struct nvhost_master *host) +int nvhost_init_t20_intr_support(struct nvhost_chip_support *op) { - host->op.intr.init_host_sync = t20_intr_init_host_sync; - host->op.intr.set_host_clocks_per_usec = - t20_intr_set_host_clocks_per_usec; - host->op.intr.set_syncpt_threshold = t20_intr_set_syncpt_threshold; - host->op.intr.enable_syncpt_intr = t20_intr_enable_syncpt_intr; - host->op.intr.disable_all_syncpt_intrs = - t20_intr_disable_all_syncpt_intrs; - host->op.intr.request_host_general_irq = - t20_intr_request_host_general_irq; - host->op.intr.free_host_general_irq = - t20_intr_free_host_general_irq; - host->op.intr.request_syncpt_irq = - t20_request_syncpt_irq; + op->intr.init_host_sync = t20_intr_init_host_sync; + op->intr.set_host_clocks_per_usec = t20_intr_set_host_clocks_per_usec; + op->intr.set_syncpt_threshold = t20_intr_set_syncpt_threshold; + op->intr.enable_syncpt_intr = t20_intr_enable_syncpt_intr; + op->intr.disable_all_syncpt_intrs = t20_intr_disable_all_syncpt_intrs; + op->intr.request_host_general_irq = t20_intr_request_host_general_irq; + op->intr.free_host_general_irq = t20_intr_free_host_general_irq; + op->intr.request_syncpt_irq = t20_request_syncpt_irq; return 0; } |