diff options
Diffstat (limited to 'arch/arm/mach-vt8500/irq.c')
| -rw-r--r-- | arch/arm/mach-vt8500/irq.c | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/arch/arm/mach-vt8500/irq.c b/arch/arm/mach-vt8500/irq.c deleted file mode 100644 index f8f9ab9bc56..00000000000 --- a/arch/arm/mach-vt8500/irq.c +++ /dev/null @@ -1,221 +0,0 @@ -/* - * arch/arm/mach-vt8500/irq.c - * - * Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz> - * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -/* - * This file is copied and modified from the original irq.c provided by - * Alexey Charkov. Minor changes have been made for Device Tree Support. - */ - -#include <linux/slab.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/irqdomain.h> -#include <linux/interrupt.h> -#include <linux/bitops.h> - -#include <linux/of.h> -#include <linux/of_irq.h> -#include <linux/of_address.h> - -#include <asm/irq.h> - - -#define VT8500_ICPC_IRQ 0x20 -#define VT8500_ICPC_FIQ 0x24 -#define VT8500_ICDC 0x40 /* Destination Control 64*u32 */ -#define VT8500_ICIS 0x80 /* Interrupt status, 16*u32 */ - -/* ICPC */ -#define ICPC_MASK 0x3F -#define ICPC_ROTATE BIT(6) - -/* IC_DCTR */ -#define ICDC_IRQ 0x00 -#define ICDC_FIQ 0x01 -#define ICDC_DSS0 0x02 -#define ICDC_DSS1 0x03 -#define ICDC_DSS2 0x04 -#define ICDC_DSS3 0x05 -#define ICDC_DSS4 0x06 -#define ICDC_DSS5 0x07 - -#define VT8500_INT_DISABLE 0 -#define VT8500_INT_ENABLE BIT(3) - -#define VT8500_TRIGGER_HIGH 0 -#define VT8500_TRIGGER_RISING BIT(5) -#define VT8500_TRIGGER_FALLING BIT(6) -#define VT8500_EDGE ( VT8500_TRIGGER_RISING \ - | VT8500_TRIGGER_FALLING) - -static int irq_cnt; - -struct vt8500_irq_priv { - void __iomem *base; -}; - -static void vt8500_irq_mask(struct irq_data *d) -{ - struct vt8500_irq_priv *priv = - (struct vt8500_irq_priv *)(d->domain->host_data); - void __iomem *base = priv->base; - u8 edge; - - edge = readb(base + VT8500_ICDC + d->hwirq) & VT8500_EDGE; - if (edge) { - void __iomem *stat_reg = base + VT8500_ICIS - + (d->hwirq < 32 ? 0 : 4); - unsigned status = readl(stat_reg); - - status |= (1 << (d->hwirq & 0x1f)); - writel(status, stat_reg); - } else { - u8 dctr = readb(base + VT8500_ICDC + d->hwirq); - - dctr &= ~VT8500_INT_ENABLE; - writeb(dctr, base + VT8500_ICDC + d->hwirq); - } -} - -static void vt8500_irq_unmask(struct irq_data *d) -{ - struct vt8500_irq_priv *priv = - (struct vt8500_irq_priv *)(d->domain->host_data); - void __iomem *base = priv->base; - u8 dctr; - - dctr = readb(base + VT8500_ICDC + d->hwirq); - dctr |= VT8500_INT_ENABLE; - writeb(dctr, base + VT8500_ICDC + d->hwirq); -} - -static int vt8500_irq_set_type(struct irq_data *d, unsigned int flow_type) -{ - struct vt8500_irq_priv *priv = - (struct vt8500_irq_priv *)(d->domain->host_data); - void __iomem *base = priv->base; - u8 dctr; - - dctr = readb(base + VT8500_ICDC + d->hwirq); - dctr &= ~VT8500_EDGE; - - switch (flow_type) { - case IRQF_TRIGGER_LOW: - return -EINVAL; - case IRQF_TRIGGER_HIGH: - dctr |= VT8500_TRIGGER_HIGH; - __irq_set_handler_locked(d->irq, handle_level_irq); - break; - case IRQF_TRIGGER_FALLING: - dctr |= VT8500_TRIGGER_FALLING; - __irq_set_handler_locked(d->irq, handle_edge_irq); - break; - case IRQF_TRIGGER_RISING: - dctr |= VT8500_TRIGGER_RISING; - __irq_set_handler_locked(d->irq, handle_edge_irq); - break; - } - writeb(dctr, base + VT8500_ICDC + d->hwirq); - - return 0; -} - -static struct irq_chip vt8500_irq_chip = { - .name = "vt8500", - .irq_ack = vt8500_irq_mask, - .irq_mask = vt8500_irq_mask, - .irq_unmask = vt8500_irq_unmask, - .irq_set_type = vt8500_irq_set_type, -}; - -static void __init vt8500_init_irq_hw(void __iomem *base) -{ - unsigned int i; - - /* Enable rotating priority for IRQ */ - writel(ICPC_ROTATE, base + VT8500_ICPC_IRQ); - writel(0x00, base + VT8500_ICPC_FIQ); - - for (i = 0; i < 64; i++) { - /* Disable all interrupts and route them to IRQ */ - writeb(VT8500_INT_DISABLE | ICDC_IRQ, - base + VT8500_ICDC + i); - } -} - -static int vt8500_irq_map(struct irq_domain *h, unsigned int virq, - irq_hw_number_t hw) -{ - irq_set_chip_and_handler(virq, &vt8500_irq_chip, handle_level_irq); - set_irq_flags(virq, IRQF_VALID); - - return 0; -} - -static struct irq_domain_ops vt8500_irq_domain_ops = { - .map = vt8500_irq_map, - .xlate = irq_domain_xlate_onecell, -}; - -int __init vt8500_irq_init(struct device_node *node, struct device_node *parent) -{ - struct irq_domain *vt8500_irq_domain; - struct vt8500_irq_priv *priv; - int irq, i; - struct device_node *np = node; - - priv = kzalloc(sizeof(struct vt8500_irq_priv), GFP_KERNEL); - priv->base = of_iomap(np, 0); - - vt8500_irq_domain = irq_domain_add_legacy(node, 64, irq_cnt, 0, - &vt8500_irq_domain_ops, priv); - if (!vt8500_irq_domain) - pr_err("%s: Unable to add wmt irq domain!\n", __func__); - - irq_set_default_host(vt8500_irq_domain); - - vt8500_init_irq_hw(priv->base); - - pr_info("Added IRQ Controller @ %x [virq_base = %d]\n", - (u32)(priv->base), irq_cnt); - - /* check if this is a slaved controller */ - if (of_irq_count(np) != 0) { - /* check that we have the correct number of interrupts */ - if (of_irq_count(np) != 8) { - pr_err("%s: Incorrect IRQ map for slave controller\n", - __func__); - return -EINVAL; - } - - for (i = 0; i < 8; i++) { - irq = irq_of_parse_and_map(np, i); - enable_irq(irq); - } - - pr_info("vt8500-irq: Enabled slave->parent interrupts\n"); - } - - irq_cnt += 64; - - return 0; -} - |