/* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ipic.h" static struct ipic * primary_ipic; static DEFINE_SPINLOCK(ipic_lock); static struct ipic_info ipic_info[] = { [9] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_D, .force = IPIC_SIFCR_H, .bit = 24, .prio_mask = 0, }, [10] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_D, .force = IPIC_SIFCR_H, .bit = 25, .prio_mask = 1, }, [11] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_D, .force = IPIC_SIFCR_H, .bit = 26, .prio_mask = 2, }, [14] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_D, .force = IPIC_SIFCR_H, .bit = 29, .prio_mask = 5, }, [15] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_D, .force = IPIC_SIFCR_H, .bit = 30, .prio_mask = 6, }, [16] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_D, .force = IPIC_SIFCR_H, .bit = 31, .prio_mask = 7, }, [17] = { .pend = IPIC_SEPNR, .mask = IPIC_SEMSR, .prio = IPIC_SMPRR_A, .force = IPIC_SEFCR, .bit = 1, .prio_mask = 5, }, [18] = { .pend = IPIC_SEPNR, .mask = IPIC_SEMSR, .prio = IPIC_SMPRR_A, .force = IPIC_SEFCR, .bit = 2, .prio_mask = 6, }, [19] = { .pend = IPIC_SEPNR, .mask = IPIC_SEMSR, .prio = IPIC_SMPRR_A, .force = IPIC_SEFCR, .bit = 3, .prio_mask = 7, }, [20] = { .pend = IPIC_SEPNR, .mask = IPIC_SEMSR, .prio = IPIC_SMPRR_B, .force = IPIC_SEFCR, .bit = 4, .prio_mask = 4, }, [21] = { .pend = IPIC_SEPNR, .mask = IPIC_SEMSR, .prio = IPIC_SMPRR_B, .force = IPIC_SEFCR, .bit = 5, .prio_mask = 5, }, [22] = { .pend = IPIC_SEPNR, .mask = IPIC_SEMSR, .prio = IPIC_SMPRR_B, .force = IPIC_SEFCR, .bit = 6, .prio_mask = 6, }, [23] = { .pend = IPIC_SEPNR, .mask = IPIC_SEMSR, .prio = IPIC_SMPRR_B, .force = IPIC_SEFCR, .bit = 7, .prio_mask = 7, }, [32] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_A, .force = IPIC_SIFCR_H, .bit = 0, .prio_mask = 0, }, [33] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_A, .force = IPIC_SIFCR_H, .bit = 1, .prio_mask = 1, }, [34] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_A, .force = IPIC_SIFCR_H, .bit = 2, .prio_mask = 2, }, [35] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_A, .force = IPIC_SIFCR_H, .bit = 3, .prio_mask = 3, }, [36] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_A, .force = IPIC_SIFCR_H, .bit = 4, .prio_mask = 4, }, [37] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_A, .force = IPIC_SIFCR_H, .bit = 5, .prio_mask = 5, }, [38] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_A, .force = IPIC_SIFCR_H, .bit = 6, .prio_mask = 6, }, [39] = { .pend = IPIC_SIPNR_H, .mask = IPIC_SIMSR_H, .prio = IPIC_SIPRR_A, .force = IPIC_SIFCR_H, .bit = 7, .prio_mask = 7, }, [48] = { .pend = IPIC_SEPNR, .mask = IPIC_SEMSR, .prio = IPIC_SMPRR_A, .force = IPIC_SEFCR, .bit = 0, .prio_mask = 4, }, [64] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = IPIC_SMPRR_A, .force = IPIC_SIFCR_L, .bit = 0, .prio_mask = 0, }, [65] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = IPIC_SMPRR_A, .force = IPIC_SIFCR_L, .bit = 1, .prio_mask = 1, }, [66] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = IPIC_SMPRR_A, .force = IPIC_SIFCR_L, .bit = 2, .prio_mask = 2, }, [67] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = IPIC_SMPRR_A, .force = IPIC_SIFCR_L, .bit = 3, .prio_mask = 3, }, [68] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = IPIC_SMPRR_B, .force = IPIC_SIFCR_L, .bit = 4, .prio_mask = 0, }, [69] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = IPIC_SMPRR_B, .force = IPIC_SIFCR_L, .bit = 5, .prio_mask = 1, }, [70] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = IPIC_SMPRR_B, .force = IPIC_SIFCR_L, .bit = 6, .prio_mask = 2, }, [71] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = IPIC_SMPRR_B, .force = IPIC_SIFCR_L, .bit = 7, .prio_mask = 3, }, [72] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 8, }, [73] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 9, }, [74] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 10, }, [75] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 11, }, [76] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 12, }, [77] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 13, }, [78] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 14, }, [79] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 15, }, [80] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 16, }, [84] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 20, }, [85] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 21, }, [90] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 26, }, [91] = { .pend = IPIC_SIPNR_L, .mask = IPIC_SIMSR_L, .prio = 0, .force = IPIC_SIFCR_L, .bit = 27, }, }; 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); 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].pend); temp |= (1 << (31 - ipic_info[src].bit)); ipic_write(ipic->regs, ipic_info[src].pend, temp); 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].pend); temp |= (1 << (31 - ipic_info[src].bit)); ipic_write(ipic->regs, ipic_info[src].pend, temp); 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; } 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; } else { desc->handle_irq = handle_edge_irq; } /* 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; } static struct irq_chip ipic_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; struct irq_chip *chip; /* Default chip */ chip = &ipic->hc_irq; set_irq_chip_data(virq, ipic); set_irq_chip_and_handler(virq, 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; ipic->hc_irq = ipic_irq_chip; /* 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_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_SICNR, 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_SIPRR_A_DEFAULT); ipic_write(primary_ipic->regs, IPIC_SIPRR_D, IPIC_SIPRR_D_DEFAULT); ipic_write(primary_ipic->regs, IPIC_SMPRR_A, IPIC_SMPRR_A_DEFAULT); ipic_write(primary_ipic->regs, IPIC_SMPRR_B, IPIC_SMPRR_B_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 = { set_kset_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->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);