irq_ipr.c
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上传日期:2013-04-10
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- /* $Id: irq_ipr.c,v 1.20 2001/07/15 23:26:56 gniibe Exp $
- *
- * linux/arch/sh/kernel/irq_ipr.c
- *
- * Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi
- * Copyright (C) 2000 Kazumoto Kojima
- *
- * Interrupt handling for IPR-based IRQ.
- *
- * Supported system:
- * On-chip supporting modules (TMU, RTC, etc.).
- * On-chip supporting modules for SH7709/SH7709A/SH7729.
- * Hitachi SolutionEngine external I/O:
- * MS7709SE01, MS7709ASE01, and MS7750SE01
- *
- */
- #include <linux/config.h>
- #include <linux/init.h>
- #include <linux/irq.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/machvec.h>
- struct ipr_data {
- unsigned int addr; /* Address of Interrupt Priority Register */
- int shift; /* Shifts of the 16-bit data */
- int priority; /* The priority */
- };
- static struct ipr_data ipr_data[NR_IRQS];
- static void enable_ipr_irq(unsigned int irq);
- static void disable_ipr_irq(unsigned int irq);
- /* shutdown is same as "disable" */
- #define shutdown_ipr_irq disable_ipr_irq
- static void mask_and_ack_ipr(unsigned int);
- static void end_ipr_irq(unsigned int irq);
- static unsigned int startup_ipr_irq(unsigned int irq)
- {
- enable_ipr_irq(irq);
- return 0; /* never anything pending */
- }
- static struct hw_interrupt_type ipr_irq_type = {
- "IPR-IRQ",
- startup_ipr_irq,
- shutdown_ipr_irq,
- enable_ipr_irq,
- disable_ipr_irq,
- mask_and_ack_ipr,
- end_ipr_irq
- };
- static void disable_ipr_irq(unsigned int irq)
- {
- unsigned long val, flags;
- unsigned int addr = ipr_data[irq].addr;
- unsigned short mask = 0xffff ^ (0x0f << ipr_data[irq].shift);
- /* Set the priority in IPR to 0 */
- save_and_cli(flags);
- val = ctrl_inw(addr);
- val &= mask;
- ctrl_outw(val, addr);
- restore_flags(flags);
- }
- static void enable_ipr_irq(unsigned int irq)
- {
- unsigned long val, flags;
- unsigned int addr = ipr_data[irq].addr;
- int priority = ipr_data[irq].priority;
- unsigned short value = (priority << ipr_data[irq].shift);
- /* Set priority in IPR back to original value */
- save_and_cli(flags);
- val = ctrl_inw(addr);
- val |= value;
- ctrl_outw(val, addr);
- restore_flags(flags);
- }
- static void mask_and_ack_ipr(unsigned int irq)
- {
- disable_ipr_irq(irq);
- #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709)
- /* This is needed when we use edge triggered setting */
- /* XXX: Is it really needed? */
- if (IRQ0_IRQ <= irq && irq <= IRQ5_IRQ) {
- /* Clear external interrupt request */
- int a = ctrl_inb(INTC_IRR0);
- a &= ~(1 << (irq - IRQ0_IRQ));
- ctrl_outb(a, INTC_IRR0);
- }
- #endif
- }
- static void end_ipr_irq(unsigned int irq)
- {
- if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
- enable_ipr_irq(irq);
- }
- void make_ipr_irq(unsigned int irq, unsigned int addr, int pos, int priority)
- {
- disable_irq_nosync(irq);
- ipr_data[irq].addr = addr;
- ipr_data[irq].shift = pos*4; /* POSition (0-3) x 4 means shift */
- ipr_data[irq].priority = priority;
- irq_desc[irq].handler = &ipr_irq_type;
- disable_ipr_irq(irq);
- }
- #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709)
- static unsigned char pint_map[256];
- static unsigned long portcr_mask = 0;
- static void enable_pint_irq(unsigned int irq);
- static void disable_pint_irq(unsigned int irq);
- /* shutdown is same as "disable" */
- #define shutdown_pint_irq disable_pint_irq
- static void mask_and_ack_pint(unsigned int);
- static void end_pint_irq(unsigned int irq);
- static unsigned int startup_pint_irq(unsigned int irq)
- {
- enable_pint_irq(irq);
- return 0; /* never anything pending */
- }
- static struct hw_interrupt_type pint_irq_type = {
- "PINT-IRQ",
- startup_pint_irq,
- shutdown_pint_irq,
- enable_pint_irq,
- disable_pint_irq,
- mask_and_ack_pint,
- end_pint_irq
- };
- static void disable_pint_irq(unsigned int irq)
- {
- unsigned long val, flags;
- save_and_cli(flags);
- val = ctrl_inw(INTC_INTER);
- val &= ~(1 << (irq - PINT_IRQ_BASE));
- ctrl_outw(val, INTC_INTER); /* disable PINTn */
- portcr_mask &= ~(3 << (irq - PINT_IRQ_BASE)*2);
- restore_flags(flags);
- }
- static void enable_pint_irq(unsigned int irq)
- {
- unsigned long val, flags;
- save_and_cli(flags);
- val = ctrl_inw(INTC_INTER);
- val |= 1 << (irq - PINT_IRQ_BASE);
- ctrl_outw(val, INTC_INTER); /* enable PINTn */
- portcr_mask |= 3 << (irq - PINT_IRQ_BASE)*2;
- restore_flags(flags);
- }
- static void mask_and_ack_pint(unsigned int irq)
- {
- disable_pint_irq(irq);
- }
- static void end_pint_irq(unsigned int irq)
- {
- if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
- enable_pint_irq(irq);
- }
- void make_pint_irq(unsigned int irq)
- {
- disable_irq_nosync(irq);
- irq_desc[irq].handler = &pint_irq_type;
- disable_pint_irq(irq);
- }
- #endif
- void __init init_IRQ(void)
- {
- #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709)
- int i;
- #endif
- make_ipr_irq(TIMER_IRQ, TIMER_IPR_ADDR, TIMER_IPR_POS, TIMER_PRIORITY);
- make_ipr_irq(RTC_IRQ, RTC_IPR_ADDR, RTC_IPR_POS, RTC_PRIORITY);
- #ifdef SCI_ERI_IRQ
- make_ipr_irq(SCI_ERI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
- make_ipr_irq(SCI_RXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
- make_ipr_irq(SCI_TXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
- #endif
- #ifdef SCIF1_ERI_IRQ
- make_ipr_irq(SCIF1_ERI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
- make_ipr_irq(SCIF1_RXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
- make_ipr_irq(SCIF1_BRI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
- make_ipr_irq(SCIF1_TXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
- #endif
- #ifdef SCIF_ERI_IRQ
- make_ipr_irq(SCIF_ERI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
- make_ipr_irq(SCIF_RXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
- make_ipr_irq(SCIF_BRI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
- make_ipr_irq(SCIF_TXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
- #endif
- #ifdef IRDA_ERI_IRQ
- make_ipr_irq(IRDA_ERI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
- make_ipr_irq(IRDA_RXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
- make_ipr_irq(IRDA_BRI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
- make_ipr_irq(IRDA_TXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
- #endif
- #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709)
- /*
- * Initialize the Interrupt Controller (INTC)
- * registers to their power on values
- */
- /*
- * Enable external irq (INTC IRQ mode).
- * You should set corresponding bits of PFC to "00"
- * to enable these interrupts.
- */
- make_ipr_irq(IRQ0_IRQ, IRQ0_IPR_ADDR, IRQ0_IPR_POS, IRQ0_PRIORITY);
- make_ipr_irq(IRQ1_IRQ, IRQ1_IPR_ADDR, IRQ1_IPR_POS, IRQ1_PRIORITY);
- make_ipr_irq(IRQ2_IRQ, IRQ2_IPR_ADDR, IRQ2_IPR_POS, IRQ2_PRIORITY);
- make_ipr_irq(IRQ3_IRQ, IRQ3_IPR_ADDR, IRQ3_IPR_POS, IRQ3_PRIORITY);
- make_ipr_irq(IRQ4_IRQ, IRQ4_IPR_ADDR, IRQ4_IPR_POS, IRQ4_PRIORITY);
- make_ipr_irq(IRQ5_IRQ, IRQ5_IPR_ADDR, IRQ5_IPR_POS, IRQ5_PRIORITY);
- make_ipr_irq(PINT0_IRQ, PINT0_IPR_ADDR, PINT0_IPR_POS, PINT0_PRIORITY);
- make_ipr_irq(PINT8_IRQ, PINT8_IPR_ADDR, PINT8_IPR_POS, PINT8_PRIORITY);
- enable_ipr_irq(PINT0_IRQ);
- enable_ipr_irq(PINT8_IRQ);
- for(i = 0; i < 16; i++)
- make_pint_irq(PINT_IRQ_BASE + i);
- for(i = 0; i < 256; i++)
- {
- if(i & 1) pint_map[i] = 0;
- else if(i & 2) pint_map[i] = 1;
- else if(i & 4) pint_map[i] = 2;
- else if(i & 8) pint_map[i] = 3;
- else if(i & 0x10) pint_map[i] = 4;
- else if(i & 0x20) pint_map[i] = 5;
- else if(i & 0x40) pint_map[i] = 6;
- else if(i & 0x80) pint_map[i] = 7;
- }
- #endif /* CONFIG_CPU_SUBTYPE_SH7707 || CONFIG_CPU_SUBTYPE_SH7709 */
- /* Perform the machine specific initialisation */
- if (sh_mv.mv_init_irq != NULL) {
- sh_mv.mv_init_irq();
- }
- }
- #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709)
- int ipr_irq_demux(int irq)
- {
- unsigned long creg, dreg, d, sav;
- if(irq == PINT0_IRQ)
- {
- #if defined(CONFIG_CPU_SUBTYPE_SH7707)
- creg = PORT_PACR;
- dreg = PORT_PADR;
- #else
- creg = PORT_PCCR;
- dreg = PORT_PCDR;
- #endif
- sav = ctrl_inw(creg);
- ctrl_outw(sav | portcr_mask, creg);
- d = (~ctrl_inb(dreg) ^ ctrl_inw(INTC_ICR2)) & ctrl_inw(INTC_INTER) & 0xff;
- ctrl_outw(sav, creg);
- if(d == 0) return irq;
- return PINT_IRQ_BASE + pint_map[d];
- }
- else if(irq == PINT8_IRQ)
- {
- #if defined(CONFIG_CPU_SUBTYPE_SH7707)
- creg = PORT_PBCR;
- dreg = PORT_PBDR;
- #else
- creg = PORT_PFCR;
- dreg = PORT_PFDR;
- #endif
- sav = ctrl_inw(creg);
- ctrl_outw(sav | (portcr_mask >> 16), creg);
- d = (~ctrl_inb(dreg) ^ (ctrl_inw(INTC_ICR2) >> 8)) & (ctrl_inw(INTC_INTER) >> 8) & 0xff;
- ctrl_outw(sav, creg);
- if(d == 0) return irq;
- return PINT_IRQ_BASE + 8 + pint_map[d];
- }
- return irq;
- }
- #endif