void psc_irq(int irq, void *dev_id, struct pt_regs *regs) { int pIFR = pIFRbase + ((int) dev_id); int pIER = pIERbase + ((int) dev_id); int base_irq; int irq_bit,i; unsigned char events; irq -= VEC_SPUR; base_irq = irq << 3; #ifdef DEBUG_IRQS printk("psc_irq: irq %d pIFR = 0x%02X pIER = 0x%02X\n", irq, (int) psc_read_byte(pIFR), (int) psc_read_byte(pIER)); #endif events = psc_read_byte(pIFR) & psc_read_byte(pIER) & 0xF; if (!events) return; for (i = 0, irq_bit = 1 ; i < 4 ; i++, irq_bit <<= 1) { if (events & irq_bit) { psc_write_byte(pIER, irq_bit); mac_do_irq_list(base_irq + i, regs); psc_write_byte(pIFR, irq_bit); psc_write_byte(pIER, irq_bit | 0x80); } } }
static void psc_irq(unsigned int irq, struct irq_desc *desc) { unsigned int offset = (unsigned int)irq_desc_get_handler_data(desc); int pIFR = pIFRbase + offset; int pIER = pIERbase + offset; int irq_num; unsigned char irq_bit, events; #ifdef DEBUG_IRQS printk("psc_irq: irq %u pIFR = 0x%02X pIER = 0x%02X\n", irq, (int) psc_read_byte(pIFR), (int) psc_read_byte(pIER)); #endif events = psc_read_byte(pIFR) & psc_read_byte(pIER) & 0xF; if (!events) return; irq_num = irq << 3; irq_bit = 1; do { if (events & irq_bit) { psc_write_byte(pIFR, irq_bit); generic_handle_irq(irq_num); } irq_num++; irq_bit <<= 1; } while (events >= irq_bit); }
void psc_irq_clear(int irq) { int irq_src = IRQ_SRC(irq); int irq_idx = IRQ_IDX(irq); int pIFR = pIERbase + (irq_src << 4); psc_write_byte(pIFR, 1 << irq_idx); }
irqreturn_t psc_irq(int irq, void *dev_id) { int pIFR = pIFRbase + ((int) dev_id); int pIER = pIERbase + ((int) dev_id); int irq_num; unsigned char irq_bit, events; #ifdef DEBUG_IRQS printk("psc_irq: irq %d pIFR = 0x%02X pIER = 0x%02X\n", irq, (int) psc_read_byte(pIFR), (int) psc_read_byte(pIER)); #endif events = psc_read_byte(pIFR) & psc_read_byte(pIER) & 0xF; if (!events) return IRQ_NONE; irq_num = irq << 3; irq_bit = 1; do { if (events & irq_bit) { psc_write_byte(pIFR, irq_bit); m68k_handle_int(irq_num); } irq_num++; irq_bit <<= 1; } while (events >= irq_bit); return IRQ_HANDLED; }
void psc_irq_disable(int irq) { int irq_src = IRQ_SRC(irq); int irq_idx = IRQ_IDX(irq); int pIER = pIERbase + (irq_src << 4); #ifdef DEBUG_IRQUSE printk("psc_irq_disable(%d)\n", irq); #endif psc_write_byte(pIER, 1 << irq_idx); }
void __init psc_init(void) { int i; if (macintosh_config->ident != MAC_MODEL_C660 && macintosh_config->ident != MAC_MODEL_Q840) { psc = NULL; psc_present = 0; return; } /* * The PSC is always at the same spot, but using psc * keeps things consistent with the psc_xxxx functions. */ psc = (void *) PSC_BASE; psc_present = 1; printk("PSC detected at %p\n", psc); psc_dma_die_die_die(); #ifdef DEBUG_PSC psc_debug_dump(); #endif /* * Mask and clear all possible interrupts */ for (i = 0x30 ; i < 0x70 ; i += 0x10) { psc_write_byte(pIERbase + i, 0x0F); psc_write_byte(pIFRbase + i, 0x0F); } }