Konrad Eisele | 5213a78 | 2009-08-17 00:13:29 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB |
| 3 | * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB |
| 4 | */ |
| 5 | |
| 6 | #include <linux/kernel.h> |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/errno.h> |
| 9 | #include <linux/mutex.h> |
| 10 | #include <linux/slab.h> |
| 11 | #include <linux/of.h> |
| 12 | #include <linux/of_platform.h> |
| 13 | #include <linux/interrupt.h> |
| 14 | #include <linux/of_device.h> |
| 15 | #include <asm/oplib.h> |
| 16 | #include <asm/timer.h> |
| 17 | #include <asm/prom.h> |
| 18 | #include <asm/leon.h> |
| 19 | #include <asm/leon_amba.h> |
| 20 | |
| 21 | #include "prom.h" |
| 22 | #include "irq.h" |
| 23 | |
| 24 | struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address, initialized by amba_init() */ |
| 25 | struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address, initialized by amba_init() */ |
| 26 | struct amba_apb_device leon_percpu_timer_dev[16]; |
| 27 | |
| 28 | int leondebug_irq_disable; |
| 29 | int leon_debug_irqout; |
| 30 | static int dummy_master_l10_counter; |
| 31 | |
| 32 | unsigned long leon3_gptimer_irq; /* interrupt controller irq number, initialized by amba_init() */ |
| 33 | unsigned int sparc_leon_eirq; |
| 34 | #define LEON_IMASK ((&leon3_irqctrl_regs->mask[0])) |
| 35 | |
| 36 | /* Return the IRQ of the pending IRQ on the extended IRQ controller */ |
| 37 | int sparc_leon_eirq_get(int eirq, int cpu) |
| 38 | { |
| 39 | return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f; |
| 40 | } |
| 41 | |
| 42 | irqreturn_t sparc_leon_eirq_isr(int dummy, void *dev_id) |
| 43 | { |
| 44 | printk(KERN_ERR "sparc_leon_eirq_isr: ERROR EXTENDED IRQ\n"); |
| 45 | return IRQ_HANDLED; |
| 46 | } |
| 47 | |
| 48 | /* The extended IRQ controller has been found, this function registers it */ |
| 49 | void sparc_leon_eirq_register(int eirq) |
| 50 | { |
| 51 | int irq; |
| 52 | |
| 53 | /* Register a "BAD" handler for this interrupt, it should never happen */ |
| 54 | irq = request_irq(eirq, sparc_leon_eirq_isr, |
| 55 | (IRQF_DISABLED | SA_STATIC_ALLOC), "extirq", NULL); |
| 56 | |
| 57 | if (irq) { |
| 58 | printk(KERN_ERR |
| 59 | "sparc_leon_eirq_register: unable to attach IRQ%d\n", |
| 60 | eirq); |
| 61 | } else { |
| 62 | sparc_leon_eirq = eirq; |
| 63 | } |
| 64 | |
| 65 | } |
| 66 | |
| 67 | static inline unsigned long get_irqmask(unsigned int irq) |
| 68 | { |
| 69 | unsigned long mask; |
| 70 | |
| 71 | if (!irq || ((irq > 0xf) && !sparc_leon_eirq) |
| 72 | || ((irq > 0x1f) && sparc_leon_eirq)) { |
| 73 | printk(KERN_ERR |
| 74 | "leon_get_irqmask: false irq number: %d\n", irq); |
| 75 | mask = 0; |
| 76 | } else { |
| 77 | mask = LEON_HARD_INT(irq); |
| 78 | } |
| 79 | return mask; |
| 80 | } |
| 81 | |
| 82 | static void leon_enable_irq(unsigned int irq_nr) |
| 83 | { |
| 84 | unsigned long mask, flags; |
| 85 | mask = get_irqmask(irq_nr); |
| 86 | local_irq_save(flags); |
| 87 | LEON3_BYPASS_STORE_PA(LEON_IMASK, |
| 88 | (LEON3_BYPASS_LOAD_PA(LEON_IMASK) | (mask))); |
| 89 | local_irq_restore(flags); |
| 90 | } |
| 91 | |
| 92 | static void leon_disable_irq(unsigned int irq_nr) |
| 93 | { |
| 94 | unsigned long mask, flags; |
| 95 | mask = get_irqmask(irq_nr); |
| 96 | local_irq_save(flags); |
| 97 | LEON3_BYPASS_STORE_PA(LEON_IMASK, |
| 98 | (LEON3_BYPASS_LOAD_PA(LEON_IMASK) & ~(mask))); |
| 99 | local_irq_restore(flags); |
| 100 | |
| 101 | } |
| 102 | |
| 103 | void __init leon_init_timers(irq_handler_t counter_fn) |
| 104 | { |
| 105 | int irq; |
| 106 | |
| 107 | leondebug_irq_disable = 0; |
| 108 | leon_debug_irqout = 0; |
| 109 | master_l10_counter = (unsigned int *)&dummy_master_l10_counter; |
| 110 | dummy_master_l10_counter = 0; |
| 111 | |
| 112 | if (leon3_gptimer_regs && leon3_irqctrl_regs) { |
| 113 | LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].val, 0); |
| 114 | LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].rld, |
| 115 | (((1000000 / 100) - 1))); |
| 116 | LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, 0); |
| 117 | |
| 118 | } else { |
| 119 | printk(KERN_ERR "No Timer/irqctrl found\n"); |
| 120 | BUG(); |
| 121 | } |
| 122 | |
| 123 | irq = request_irq(leon3_gptimer_irq, |
| 124 | counter_fn, |
| 125 | (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL); |
| 126 | |
| 127 | if (irq) { |
| 128 | printk(KERN_ERR "leon_time_init: unable to attach IRQ%d\n", |
| 129 | LEON_INTERRUPT_TIMER1); |
| 130 | prom_halt(); |
| 131 | } |
| 132 | |
| 133 | if (leon3_gptimer_regs) { |
| 134 | LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, |
| 135 | LEON3_GPTIMER_EN | |
| 136 | LEON3_GPTIMER_RL | |
| 137 | LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | void leon_clear_clock_irq(void) |
| 142 | { |
| 143 | } |
| 144 | |
| 145 | void leon_load_profile_irq(int cpu, unsigned int limit) |
| 146 | { |
| 147 | BUG(); |
| 148 | } |
| 149 | |
| 150 | |
| 151 | |
| 152 | |
| 153 | void __init leon_trans_init(struct device_node *dp) |
| 154 | { |
| 155 | if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) { |
| 156 | struct property *p; |
| 157 | p = of_find_property(dp, "mid", (void *)0); |
| 158 | if (p) { |
| 159 | int mid; |
| 160 | dp->name = prom_early_alloc(5 + 1); |
| 161 | memcpy(&mid, p->value, p->length); |
| 162 | sprintf((char *)dp->name, "cpu%.2d", mid); |
| 163 | } |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | void __initdata (*prom_amba_init)(struct device_node *dp, struct device_node ***nextp) = 0; |
| 168 | |
| 169 | void __init leon_node_init(struct device_node *dp, struct device_node ***nextp) |
| 170 | { |
| 171 | if (prom_amba_init && |
| 172 | strcmp(dp->type, "ambapp") == 0 && |
| 173 | strcmp(dp->name, "ambapp0") == 0) { |
| 174 | prom_amba_init(dp, nextp); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | void __init leon_init_IRQ(void) |
| 179 | { |
| 180 | sparc_init_timers = leon_init_timers; |
| 181 | |
| 182 | BTFIXUPSET_CALL(enable_irq, leon_enable_irq, BTFIXUPCALL_NORM); |
| 183 | BTFIXUPSET_CALL(disable_irq, leon_disable_irq, BTFIXUPCALL_NORM); |
| 184 | BTFIXUPSET_CALL(enable_pil_irq, leon_enable_irq, BTFIXUPCALL_NORM); |
| 185 | BTFIXUPSET_CALL(disable_pil_irq, leon_disable_irq, BTFIXUPCALL_NORM); |
| 186 | |
| 187 | BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq, |
| 188 | BTFIXUPCALL_NORM); |
| 189 | BTFIXUPSET_CALL(load_profile_irq, leon_load_profile_irq, |
| 190 | BTFIXUPCALL_NOP); |
| 191 | |
| 192 | #ifdef CONFIG_SMP |
| 193 | BTFIXUPSET_CALL(set_cpu_int, leon_set_cpu_int, BTFIXUPCALL_NORM); |
| 194 | BTFIXUPSET_CALL(clear_cpu_int, leon_clear_ipi, BTFIXUPCALL_NORM); |
| 195 | BTFIXUPSET_CALL(set_irq_udt, leon_set_udt, BTFIXUPCALL_NORM); |
| 196 | #endif |
| 197 | |
| 198 | } |
| 199 | |
| 200 | void __init leon_init(void) |
| 201 | { |
| 202 | prom_build_more = &leon_node_init; |
| 203 | } |