diff options
Diffstat (limited to 'arch/sh/kernel/cpu/irq_ipr.c')
| -rw-r--r-- | arch/sh/kernel/cpu/irq_ipr.c | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/irq_ipr.c b/arch/sh/kernel/cpu/irq_ipr.c new file mode 100644 index 00000000000..7ea3d2d030e --- /dev/null +++ b/arch/sh/kernel/cpu/irq_ipr.c @@ -0,0 +1,339 @@ +/* $Id: irq_ipr.c,v 1.1.2.1 2002/11/17 10:53:43 mrbrown Exp $ + * + * linux/arch/sh/kernel/irq_ipr.c + * + * Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi + * Copyright (C) 2000 Kazumoto Kojima + * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp> + * + * Interrupt handling for IPR-based IRQ. + * + * Supported system: + * On-chip supporting modules (TMU, RTC, etc.). + * On-chip supporting modules for SH7709/SH7709A/SH7729/SH7300. + * Hitachi SolutionEngine external I/O: + * MS7709SE01, MS7709ASE01, and MS7750SE01 + * + */ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/module.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 */ + local_irq_save(flags); + val = ctrl_inw(addr); + val &= mask; + ctrl_outw(val, addr); + local_irq_restore(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 */ + local_irq_save(flags); + val = ctrl_inw(addr); + val |= value; + ctrl_outw(val, addr); + local_irq_restore(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) || \ + defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705) + /* 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_SH7705) || \ + 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; + + local_irq_save(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); + local_irq_restore(flags); +} + +static void enable_pint_irq(unsigned int irq) +{ + unsigned long val, flags; + + local_irq_save(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; + local_irq_restore(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_SH7705) || \ + 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(TIMER1_IRQ, TIMER1_IPR_ADDR, TIMER1_IPR_POS, TIMER1_PRIORITY); +#if defined(CONFIG_SH_RTC) + make_ipr_irq(RTC_IRQ, RTC_IPR_ADDR, RTC_IPR_POS, RTC_PRIORITY); +#endif + +#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 + +#if defined(CONFIG_CPU_SUBTYPE_SH7300) + make_ipr_irq(SCIF0_IRQ, SCIF0_IPR_ADDR, SCIF0_IPR_POS, SCIF0_PRIORITY); + make_ipr_irq(DMTE2_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY); + make_ipr_irq(DMTE3_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY); + make_ipr_irq(VIO_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_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) || \ + defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705) + /* + * 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); +#if !defined(CONFIG_CPU_SUBTYPE_SH7300) + 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_SH7300 */ +#endif /* CONFIG_CPU_SUBTYPE_SH7707 || CONFIG_CPU_SUBTYPE_SH7709 || CONFIG_CPU_SUBTYPE_SH7300*/ + +#ifdef CONFIG_CPU_SUBTYPE_ST40 + init_IRQ_intc2(); +#endif + + /* 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) || \ + defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705) +int ipr_irq_demux(int irq) +{ +#if !defined(CONFIG_CPU_SUBTYPE_SH7300) + 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]; + } +#endif + return irq; +} +#endif + +EXPORT_SYMBOL(make_ipr_irq); + |