| /* |
| * arch/powerpc/sysdev/ipic.c |
| * |
| * IPIC routines implementations. |
| * |
| * Copyright 2005 Freescale Semiconductor, Inc. |
| * |
| * 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. |
| */ |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/errno.h> |
| #include <linux/reboot.h> |
| #include <linux/slab.h> |
| #include <linux/stddef.h> |
| #include <linux/sched.h> |
| #include <linux/signal.h> |
| #include <linux/sysdev.h> |
| #include <linux/device.h> |
| #include <linux/bootmem.h> |
| #include <linux/spinlock.h> |
| #include <asm/irq.h> |
| #include <asm/io.h> |
| #include <asm/prom.h> |
| #include <asm/ipic.h> |
| |
| #include "ipic.h" |
| |
| static struct ipic * primary_ipic; |
| static struct irq_chip ipic_level_irq_chip, ipic_edge_irq_chip; |
| static DEFINE_SPINLOCK(ipic_lock); |
| |
| static struct ipic_info ipic_info[] = { |
| [1] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_C, |
| .force = IPIC_SIFCR_H, |
| .bit = 16, |
| .prio_mask = 0, |
| }, |
| [2] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_C, |
| .force = IPIC_SIFCR_H, |
| .bit = 17, |
| .prio_mask = 1, |
| }, |
| [3] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_C, |
| .force = IPIC_SIFCR_H, |
| .bit = 18, |
| .prio_mask = 2, |
| }, |
| [4] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_C, |
| .force = IPIC_SIFCR_H, |
| .bit = 19, |
| .prio_mask = 3, |
| }, |
| [5] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_C, |
| .force = IPIC_SIFCR_H, |
| .bit = 20, |
| .prio_mask = 4, |
| }, |
| [6] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_C, |
| .force = IPIC_SIFCR_H, |
| .bit = 21, |
| .prio_mask = 5, |
| }, |
| [7] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_C, |
| .force = IPIC_SIFCR_H, |
| .bit = 22, |
| .prio_mask = 6, |
| }, |
| [8] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_C, |
| .force = IPIC_SIFCR_H, |
| .bit = 23, |
| .prio_mask = 7, |
| }, |
| [9] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_D, |
| .force = IPIC_SIFCR_H, |
| .bit = 24, |
| .prio_mask = 0, |
| }, |
| [10] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_D, |
| .force = IPIC_SIFCR_H, |
| .bit = 25, |
| .prio_mask = 1, |
| }, |
| [11] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_D, |
| .force = IPIC_SIFCR_H, |
| .bit = 26, |
| .prio_mask = 2, |
| }, |
| [12] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_D, |
| .force = IPIC_SIFCR_H, |
| .bit = 27, |
| .prio_mask = 3, |
| }, |
| [13] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_D, |
| .force = IPIC_SIFCR_H, |
| .bit = 28, |
| .prio_mask = 4, |
| }, |
| [14] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_D, |
| .force = IPIC_SIFCR_H, |
| .bit = 29, |
| .prio_mask = 5, |
| }, |
| [15] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_D, |
| .force = IPIC_SIFCR_H, |
| .bit = 30, |
| .prio_mask = 6, |
| }, |
| [16] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_D, |
| .force = IPIC_SIFCR_H, |
| .bit = 31, |
| .prio_mask = 7, |
| }, |
| [17] = { |
| .ack = IPIC_SEPNR, |
| .mask = IPIC_SEMSR, |
| .prio = IPIC_SMPRR_A, |
| .force = IPIC_SEFCR, |
| .bit = 1, |
| .prio_mask = 5, |
| }, |
| [18] = { |
| .ack = IPIC_SEPNR, |
| .mask = IPIC_SEMSR, |
| .prio = IPIC_SMPRR_A, |
| .force = IPIC_SEFCR, |
| .bit = 2, |
| .prio_mask = 6, |
| }, |
| [19] = { |
| .ack = IPIC_SEPNR, |
| .mask = IPIC_SEMSR, |
| .prio = IPIC_SMPRR_A, |
| .force = IPIC_SEFCR, |
| .bit = 3, |
| .prio_mask = 7, |
| }, |
| [20] = { |
| .ack = IPIC_SEPNR, |
| .mask = IPIC_SEMSR, |
| .prio = IPIC_SMPRR_B, |
| .force = IPIC_SEFCR, |
| .bit = 4, |
| .prio_mask = 4, |
| }, |
| [21] = { |
| .ack = IPIC_SEPNR, |
| .mask = IPIC_SEMSR, |
| .prio = IPIC_SMPRR_B, |
| .force = IPIC_SEFCR, |
| .bit = 5, |
| .prio_mask = 5, |
| }, |
| [22] = { |
| .ack = IPIC_SEPNR, |
| .mask = IPIC_SEMSR, |
| .prio = IPIC_SMPRR_B, |
| .force = IPIC_SEFCR, |
| .bit = 6, |
| .prio_mask = 6, |
| }, |
| [23] = { |
| .ack = IPIC_SEPNR, |
| .mask = IPIC_SEMSR, |
| .prio = IPIC_SMPRR_B, |
| .force = IPIC_SEFCR, |
| .bit = 7, |
| .prio_mask = 7, |
| }, |
| [32] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_A, |
| .force = IPIC_SIFCR_H, |
| .bit = 0, |
| .prio_mask = 0, |
| }, |
| [33] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_A, |
| .force = IPIC_SIFCR_H, |
| .bit = 1, |
| .prio_mask = 1, |
| }, |
| [34] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_A, |
| .force = IPIC_SIFCR_H, |
| .bit = 2, |
| .prio_mask = 2, |
| }, |
| [35] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_A, |
| .force = IPIC_SIFCR_H, |
| .bit = 3, |
| .prio_mask = 3, |
| }, |
| [36] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_A, |
| .force = IPIC_SIFCR_H, |
| .bit = 4, |
| .prio_mask = 4, |
| }, |
| [37] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_A, |
| .force = IPIC_SIFCR_H, |
| .bit = 5, |
| .prio_mask = 5, |
| }, |
| [38] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_A, |
| .force = IPIC_SIFCR_H, |
| .bit = 6, |
| .prio_mask = 6, |
| }, |
| [39] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_A, |
| .force = IPIC_SIFCR_H, |
| .bit = 7, |
| .prio_mask = 7, |
| }, |
| [40] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_B, |
| .force = IPIC_SIFCR_H, |
| .bit = 8, |
| .prio_mask = 0, |
| }, |
| [41] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_B, |
| .force = IPIC_SIFCR_H, |
| .bit = 9, |
| .prio_mask = 1, |
| }, |
| [42] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_B, |
| .force = IPIC_SIFCR_H, |
| .bit = 10, |
| .prio_mask = 2, |
| }, |
| [43] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_B, |
| .force = IPIC_SIFCR_H, |
| .bit = 11, |
| .prio_mask = 3, |
| }, |
| [44] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_B, |
| .force = IPIC_SIFCR_H, |
| .bit = 12, |
| .prio_mask = 4, |
| }, |
| [45] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_B, |
| .force = IPIC_SIFCR_H, |
| .bit = 13, |
| .prio_mask = 5, |
| }, |
| [46] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_B, |
| .force = IPIC_SIFCR_H, |
| .bit = 14, |
| .prio_mask = 6, |
| }, |
| [47] = { |
| .mask = IPIC_SIMSR_H, |
| .prio = IPIC_SIPRR_B, |
| .force = IPIC_SIFCR_H, |
| .bit = 15, |
| .prio_mask = 7, |
| }, |
| [48] = { |
| .mask = IPIC_SEMSR, |
| .prio = IPIC_SMPRR_A, |
| .force = IPIC_SEFCR, |
| .bit = 0, |
| .prio_mask = 4, |
| }, |
| [64] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = IPIC_SMPRR_A, |
| .force = IPIC_SIFCR_L, |
| .bit = 0, |
| .prio_mask = 0, |
| }, |
| [65] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = IPIC_SMPRR_A, |
| .force = IPIC_SIFCR_L, |
| .bit = 1, |
| .prio_mask = 1, |
| }, |
| [66] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = IPIC_SMPRR_A, |
| .force = IPIC_SIFCR_L, |
| .bit = 2, |
| .prio_mask = 2, |
| }, |
| [67] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = IPIC_SMPRR_A, |
| .force = IPIC_SIFCR_L, |
| .bit = 3, |
| .prio_mask = 3, |
| }, |
| [68] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = IPIC_SMPRR_B, |
| .force = IPIC_SIFCR_L, |
| .bit = 4, |
| .prio_mask = 0, |
| }, |
| [69] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = IPIC_SMPRR_B, |
| .force = IPIC_SIFCR_L, |
| .bit = 5, |
| .prio_mask = 1, |
| }, |
| [70] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = IPIC_SMPRR_B, |
| .force = IPIC_SIFCR_L, |
| .bit = 6, |
| .prio_mask = 2, |
| }, |
| [71] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = IPIC_SMPRR_B, |
| .force = IPIC_SIFCR_L, |
| .bit = 7, |
| .prio_mask = 3, |
| }, |
| [72] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 8, |
| }, |
| [73] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 9, |
| }, |
| [74] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 10, |
| }, |
| [75] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 11, |
| }, |
| [76] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 12, |
| }, |
| [77] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 13, |
| }, |
| [78] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 14, |
| }, |
| [79] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 15, |
| }, |
| [80] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 16, |
| }, |
| [81] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 17, |
| }, |
| [82] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 18, |
| }, |
| [83] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 19, |
| }, |
| [84] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 20, |
| }, |
| [85] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 21, |
| }, |
| [86] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 22, |
| }, |
| [87] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 23, |
| }, |
| [88] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 24, |
| }, |
| [89] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 25, |
| }, |
| [90] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 26, |
| }, |
| [91] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 27, |
| }, |
| [94] = { |
| .mask = IPIC_SIMSR_L, |
| .prio = 0, |
| .force = IPIC_SIFCR_L, |
| .bit = 30, |
| }, |
| }; |
| |
| static inline u32 ipic_read(volatile u32 __iomem *base, unsigned int reg) |
| { |
| return in_be32(base + (reg >> 2)); |
| } |
| |
| static inline void ipic_write(volatile u32 __iomem *base, unsigned int reg, u32 value) |
| { |
| out_be32(base + (reg >> 2), value); |
| } |
| |
| static inline struct ipic * ipic_from_irq(unsigned int virq) |
| { |
| return primary_ipic; |
| } |
| |
| #define ipic_irq_to_hw(virq) ((unsigned int)irq_map[virq].hwirq) |
| |
| static void ipic_unmask_irq(unsigned int virq) |
| { |
| struct ipic *ipic = ipic_from_irq(virq); |
| unsigned int src = ipic_irq_to_hw(virq); |
| unsigned long flags; |
| u32 temp; |
| |
| spin_lock_irqsave(&ipic_lock, flags); |
| |
| temp = ipic_read(ipic->regs, ipic_info[src].mask); |
| temp |= (1 << (31 - ipic_info[src].bit)); |
| ipic_write(ipic->regs, ipic_info[src].mask, temp); |
| |
| spin_unlock_irqrestore(&ipic_lock, flags); |
| } |
| |
| static void ipic_mask_irq(unsigned int virq) |
| { |
| struct ipic *ipic = ipic_from_irq(virq); |
| unsigned int src = ipic_irq_to_hw(virq); |
| unsigned long flags; |
| u32 temp; |
| |
| spin_lock_irqsave(&ipic_lock, flags); |
| |
| temp = ipic_read(ipic->regs, ipic_info[src].mask); |
| temp &= ~(1 << (31 - ipic_info[src].bit)); |
| ipic_write(ipic->regs, ipic_info[src].mask, temp); |
| |
| /* mb() can't guarantee that masking is finished. But it does finish |
| * for nearly all cases. */ |
| mb(); |
| |
| spin_unlock_irqrestore(&ipic_lock, flags); |
| } |
| |
| static void ipic_ack_irq(unsigned int virq) |
| { |
| struct ipic *ipic = ipic_from_irq(virq); |
| unsigned int src = ipic_irq_to_hw(virq); |
| unsigned long flags; |
| u32 temp; |
| |
| spin_lock_irqsave(&ipic_lock, flags); |
| |
| temp = ipic_read(ipic->regs, ipic_info[src].ack); |
| temp |= (1 << (31 - ipic_info[src].bit)); |
| ipic_write(ipic->regs, ipic_info[src].ack, temp); |
| |
| /* mb() can't guarantee that ack is finished. But it does finish |
| * for nearly all cases. */ |
| mb(); |
| |
| spin_unlock_irqrestore(&ipic_lock, flags); |
| } |
| |
| static void ipic_mask_irq_and_ack(unsigned int virq) |
| { |
| struct ipic *ipic = ipic_from_irq(virq); |
| unsigned int src = ipic_irq_to_hw(virq); |
| unsigned long flags; |
| u32 temp; |
| |
| spin_lock_irqsave(&ipic_lock, flags); |
| |
| temp = ipic_read(ipic->regs, ipic_info[src].mask); |
| temp &= ~(1 << (31 - ipic_info[src].bit)); |
| ipic_write(ipic->regs, ipic_info[src].mask, temp); |
| |
| temp = ipic_read(ipic->regs, ipic_info[src].ack); |
| temp |= (1 << (31 - ipic_info[src].bit)); |
| ipic_write(ipic->regs, ipic_info[src].ack, temp); |
| |
| /* mb() can't guarantee that ack is finished. But it does finish |
| * for nearly all cases. */ |
| mb(); |
| |
| spin_unlock_irqrestore(&ipic_lock, flags); |
| } |
| |
| static int ipic_set_irq_type(unsigned int virq, unsigned int flow_type) |
| { |
| struct ipic *ipic = ipic_from_irq(virq); |
| unsigned int src = ipic_irq_to_hw(virq); |
| struct irq_desc *desc = get_irq_desc(virq); |
| unsigned int vold, vnew, edibit; |
| |
| if (flow_type == IRQ_TYPE_NONE) |
| flow_type = IRQ_TYPE_LEVEL_LOW; |
| |
| /* ipic supports only low assertion and high-to-low change senses |
| */ |
| if (!(flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING))) { |
| printk(KERN_ERR "ipic: sense type 0x%x not supported\n", |
| flow_type); |
| return -EINVAL; |
| } |
| /* ipic supports only edge mode on external interrupts */ |
| if ((flow_type & IRQ_TYPE_EDGE_FALLING) && !ipic_info[src].ack) { |
| printk(KERN_ERR "ipic: edge sense not supported on internal " |
| "interrupts\n"); |
| return -EINVAL; |
| } |
| |
| desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL); |
| desc->status |= flow_type & IRQ_TYPE_SENSE_MASK; |
| if (flow_type & IRQ_TYPE_LEVEL_LOW) { |
| desc->status |= IRQ_LEVEL; |
| desc->handle_irq = handle_level_irq; |
| desc->chip = &ipic_level_irq_chip; |
| } else { |
| desc->handle_irq = handle_edge_irq; |
| desc->chip = &ipic_edge_irq_chip; |
| } |
| |
| /* only EXT IRQ senses are programmable on ipic |
| * internal IRQ senses are LEVEL_LOW |
| */ |
| if (src == IPIC_IRQ_EXT0) |
| edibit = 15; |
| else |
| if (src >= IPIC_IRQ_EXT1 && src <= IPIC_IRQ_EXT7) |
| edibit = (14 - (src - IPIC_IRQ_EXT1)); |
| else |
| return (flow_type & IRQ_TYPE_LEVEL_LOW) ? 0 : -EINVAL; |
| |
| vold = ipic_read(ipic->regs, IPIC_SECNR); |
| if ((flow_type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_FALLING) { |
| vnew = vold | (1 << edibit); |
| } else { |
| vnew = vold & ~(1 << edibit); |
| } |
| if (vold != vnew) |
| ipic_write(ipic->regs, IPIC_SECNR, vnew); |
| return 0; |
| } |
| |
| /* level interrupts and edge interrupts have different ack operations */ |
| static struct irq_chip ipic_level_irq_chip = { |
| .typename = " IPIC ", |
| .unmask = ipic_unmask_irq, |
| .mask = ipic_mask_irq, |
| .mask_ack = ipic_mask_irq, |
| .set_type = ipic_set_irq_type, |
| }; |
| |
| static struct irq_chip ipic_edge_irq_chip = { |
| .typename = " IPIC ", |
| .unmask = ipic_unmask_irq, |
| .mask = ipic_mask_irq, |
| .mask_ack = ipic_mask_irq_and_ack, |
| .ack = ipic_ack_irq, |
| .set_type = ipic_set_irq_type, |
| }; |
| |
| static int ipic_host_match(struct irq_host *h, struct device_node *node) |
| { |
| /* Exact match, unless ipic node is NULL */ |
| return h->of_node == NULL || h->of_node == node; |
| } |
| |
| static int ipic_host_map(struct irq_host *h, unsigned int virq, |
| irq_hw_number_t hw) |
| { |
| struct ipic *ipic = h->host_data; |
| |
| set_irq_chip_data(virq, ipic); |
| set_irq_chip_and_handler(virq, &ipic_level_irq_chip, handle_level_irq); |
| |
| /* Set default irq type */ |
| set_irq_type(virq, IRQ_TYPE_NONE); |
| |
| return 0; |
| } |
| |
| static int ipic_host_xlate(struct irq_host *h, struct device_node *ct, |
| u32 *intspec, unsigned int intsize, |
| irq_hw_number_t *out_hwirq, unsigned int *out_flags) |
| |
| { |
| /* interrupt sense values coming from the device tree equal either |
| * LEVEL_LOW (low assertion) or EDGE_FALLING (high-to-low change) |
| */ |
| *out_hwirq = intspec[0]; |
| if (intsize > 1) |
| *out_flags = intspec[1]; |
| else |
| *out_flags = IRQ_TYPE_NONE; |
| return 0; |
| } |
| |
| static struct irq_host_ops ipic_host_ops = { |
| .match = ipic_host_match, |
| .map = ipic_host_map, |
| .xlate = ipic_host_xlate, |
| }; |
| |
| struct ipic * __init ipic_init(struct device_node *node, unsigned int flags) |
| { |
| struct ipic *ipic; |
| struct resource res; |
| u32 temp = 0, ret; |
| |
| ipic = alloc_bootmem(sizeof(struct ipic)); |
| if (ipic == NULL) |
| return NULL; |
| |
| memset(ipic, 0, sizeof(struct ipic)); |
| |
| ipic->irqhost = irq_alloc_host(of_node_get(node), IRQ_HOST_MAP_LINEAR, |
| NR_IPIC_INTS, |
| &ipic_host_ops, 0); |
| if (ipic->irqhost == NULL) { |
| of_node_put(node); |
| return NULL; |
| } |
| |
| ret = of_address_to_resource(node, 0, &res); |
| if (ret) { |
| of_node_put(node); |
| return NULL; |
| } |
| |
| ipic->regs = ioremap(res.start, res.end - res.start + 1); |
| |
| ipic->irqhost->host_data = ipic; |
| |
| /* init hw */ |
| ipic_write(ipic->regs, IPIC_SICNR, 0x0); |
| |
| /* default priority scheme is grouped. If spread mode is required |
| * configure SICFR accordingly */ |
| if (flags & IPIC_SPREADMODE_GRP_A) |
| temp |= SICFR_IPSA; |
| if (flags & IPIC_SPREADMODE_GRP_B) |
| temp |= SICFR_IPSB; |
| if (flags & IPIC_SPREADMODE_GRP_C) |
| temp |= SICFR_IPSC; |
| if (flags & IPIC_SPREADMODE_GRP_D) |
| temp |= SICFR_IPSD; |
| if (flags & IPIC_SPREADMODE_MIX_A) |
| temp |= SICFR_MPSA; |
| if (flags & IPIC_SPREADMODE_MIX_B) |
| temp |= SICFR_MPSB; |
| |
| ipic_write(ipic->regs, IPIC_SICFR, temp); |
| |
| /* handle MCP route */ |
| temp = 0; |
| if (flags & IPIC_DISABLE_MCP_OUT) |
| temp = SERCR_MCPR; |
| ipic_write(ipic->regs, IPIC_SERCR, temp); |
| |
| /* handle routing of IRQ0 to MCP */ |
| temp = ipic_read(ipic->regs, IPIC_SEMSR); |
| |
| if (flags & IPIC_IRQ0_MCP) |
| temp |= SEMSR_SIRQ0; |
| else |
| temp &= ~SEMSR_SIRQ0; |
| |
| ipic_write(ipic->regs, IPIC_SEMSR, temp); |
| |
| primary_ipic = ipic; |
| irq_set_default_host(primary_ipic->irqhost); |
| |
| printk ("IPIC (%d IRQ sources) at %p\n", NR_IPIC_INTS, |
| primary_ipic->regs); |
| |
| return ipic; |
| } |
| |
| int ipic_set_priority(unsigned int virq, unsigned int priority) |
| { |
| struct ipic *ipic = ipic_from_irq(virq); |
| unsigned int src = ipic_irq_to_hw(virq); |
| u32 temp; |
| |
| if (priority > 7) |
| return -EINVAL; |
| if (src > 127) |
| return -EINVAL; |
| if (ipic_info[src].prio == 0) |
| return -EINVAL; |
| |
| temp = ipic_read(ipic->regs, ipic_info[src].prio); |
| |
| if (priority < 4) { |
| temp &= ~(0x7 << (20 + (3 - priority) * 3)); |
| temp |= ipic_info[src].prio_mask << (20 + (3 - priority) * 3); |
| } else { |
| temp &= ~(0x7 << (4 + (7 - priority) * 3)); |
| temp |= ipic_info[src].prio_mask << (4 + (7 - priority) * 3); |
| } |
| |
| ipic_write(ipic->regs, ipic_info[src].prio, temp); |
| |
| return 0; |
| } |
| |
| void ipic_set_highest_priority(unsigned int virq) |
| { |
| struct ipic *ipic = ipic_from_irq(virq); |
| unsigned int src = ipic_irq_to_hw(virq); |
| u32 temp; |
| |
| temp = ipic_read(ipic->regs, IPIC_SICFR); |
| |
| /* clear and set HPI */ |
| temp &= 0x7f000000; |
| temp |= (src & 0x7f) << 24; |
| |
| ipic_write(ipic->regs, IPIC_SICFR, temp); |
| } |
| |
| void ipic_set_default_priority(void) |
| { |
| ipic_write(primary_ipic->regs, IPIC_SIPRR_A, IPIC_PRIORITY_DEFAULT); |
| ipic_write(primary_ipic->regs, IPIC_SIPRR_B, IPIC_PRIORITY_DEFAULT); |
| ipic_write(primary_ipic->regs, IPIC_SIPRR_C, IPIC_PRIORITY_DEFAULT); |
| ipic_write(primary_ipic->regs, IPIC_SIPRR_D, IPIC_PRIORITY_DEFAULT); |
| ipic_write(primary_ipic->regs, IPIC_SMPRR_A, IPIC_PRIORITY_DEFAULT); |
| ipic_write(primary_ipic->regs, IPIC_SMPRR_B, IPIC_PRIORITY_DEFAULT); |
| } |
| |
| void ipic_enable_mcp(enum ipic_mcp_irq mcp_irq) |
| { |
| struct ipic *ipic = primary_ipic; |
| u32 temp; |
| |
| temp = ipic_read(ipic->regs, IPIC_SERMR); |
| temp |= (1 << (31 - mcp_irq)); |
| ipic_write(ipic->regs, IPIC_SERMR, temp); |
| } |
| |
| void ipic_disable_mcp(enum ipic_mcp_irq mcp_irq) |
| { |
| struct ipic *ipic = primary_ipic; |
| u32 temp; |
| |
| temp = ipic_read(ipic->regs, IPIC_SERMR); |
| temp &= (1 << (31 - mcp_irq)); |
| ipic_write(ipic->regs, IPIC_SERMR, temp); |
| } |
| |
| u32 ipic_get_mcp_status(void) |
| { |
| return ipic_read(primary_ipic->regs, IPIC_SERMR); |
| } |
| |
| void ipic_clear_mcp_status(u32 mask) |
| { |
| ipic_write(primary_ipic->regs, IPIC_SERMR, mask); |
| } |
| |
| /* Return an interrupt vector or NO_IRQ if no interrupt is pending. */ |
| unsigned int ipic_get_irq(void) |
| { |
| int irq; |
| |
| BUG_ON(primary_ipic == NULL); |
| |
| #define IPIC_SIVCR_VECTOR_MASK 0x7f |
| irq = ipic_read(primary_ipic->regs, IPIC_SIVCR) & IPIC_SIVCR_VECTOR_MASK; |
| |
| if (irq == 0) /* 0 --> no irq is pending */ |
| return NO_IRQ; |
| |
| return irq_linear_revmap(primary_ipic->irqhost, irq); |
| } |
| |
| static struct sysdev_class ipic_sysclass = { |
| .name = "ipic", |
| }; |
| |
| static struct sys_device device_ipic = { |
| .id = 0, |
| .cls = &ipic_sysclass, |
| }; |
| |
| static int __init init_ipic_sysfs(void) |
| { |
| int rc; |
| |
| if (!primary_ipic || !primary_ipic->regs) |
| return -ENODEV; |
| printk(KERN_DEBUG "Registering ipic with sysfs...\n"); |
| |
| rc = sysdev_class_register(&ipic_sysclass); |
| if (rc) { |
| printk(KERN_ERR "Failed registering ipic sys class\n"); |
| return -ENODEV; |
| } |
| rc = sysdev_register(&device_ipic); |
| if (rc) { |
| printk(KERN_ERR "Failed registering ipic sys device\n"); |
| return -ENODEV; |
| } |
| return 0; |
| } |
| |
| subsys_initcall(init_ipic_sysfs); |
