diff options
Diffstat (limited to 'arch/sh/kernel/cpu/irq/ipr.c')
| -rw-r--r-- | arch/sh/kernel/cpu/irq/ipr.c | 206 |
1 files changed, 206 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..fdbd718ae5c --- /dev/null +++ b/arch/sh/kernel/cpu/irq/ipr.c @@ -0,0 +1,206 @@ +/* + * arch/sh/kernel/cpu/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 = { + .typename = "IPR-IRQ", + .startup = startup_ipr_irq, + .shutdown = shutdown_ipr_irq, + .enable = enable_ipr_irq, + .disable = disable_ipr_irq, + .ack = mask_and_ack_ipr, + .end = 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, int maskpos) +{ + 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); +} + +void __init init_IRQ(void) +{ +#ifndef CONFIG_CPU_SUBTYPE_SH7780 + make_ipr_irq(TIMER_IRQ, TIMER_IPR_ADDR, TIMER_IPR_POS, TIMER_PRIORITY, 0); + make_ipr_irq(TIMER1_IRQ, TIMER1_IPR_ADDR, TIMER1_IPR_POS, TIMER1_PRIORITY, 0); +#if defined(CONFIG_SH_RTC) + make_ipr_irq(RTC_IRQ, RTC_IPR_ADDR, RTC_IPR_POS, RTC_PRIORITY, 0); +#endif + +#ifdef SCI_ERI_IRQ + make_ipr_irq(SCI_ERI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY, 0); + make_ipr_irq(SCI_RXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY, 0); + make_ipr_irq(SCI_TXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY, 0); +#endif + +#ifdef SCIF1_ERI_IRQ + make_ipr_irq(SCIF1_ERI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY, 0); + make_ipr_irq(SCIF1_RXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY, 0); + make_ipr_irq(SCIF1_BRI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY, 0); + make_ipr_irq(SCIF1_TXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY, 0); +#endif + +#if defined(CONFIG_CPU_SUBTYPE_SH7300) + make_ipr_irq(SCIF0_IRQ, SCIF0_IPR_ADDR, SCIF0_IPR_POS, SCIF0_PRIORITY, 0); + make_ipr_irq(DMTE2_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY, 0); + make_ipr_irq(DMTE3_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY, 0); + make_ipr_irq(VIO_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY, 0); +#endif + +#ifdef SCIF_ERI_IRQ + make_ipr_irq(SCIF_ERI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY, 0); + make_ipr_irq(SCIF_RXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY, 0); + make_ipr_irq(SCIF_BRI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY, 0); + make_ipr_irq(SCIF_TXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY, 0); +#endif + +#ifdef IRDA_ERI_IRQ + make_ipr_irq(IRDA_ERI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY, 0); + make_ipr_irq(IRDA_RXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY, 0); + make_ipr_irq(IRDA_BRI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY, 0); + make_ipr_irq(IRDA_TXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY, 0); +#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, 0); + make_ipr_irq(IRQ1_IRQ, IRQ1_IPR_ADDR, IRQ1_IPR_POS, IRQ1_PRIORITY, 0); + make_ipr_irq(IRQ2_IRQ, IRQ2_IPR_ADDR, IRQ2_IPR_POS, IRQ2_PRIORITY, 0); + make_ipr_irq(IRQ3_IRQ, IRQ3_IPR_ADDR, IRQ3_IPR_POS, IRQ3_PRIORITY, 0); + make_ipr_irq(IRQ4_IRQ, IRQ4_IPR_ADDR, IRQ4_IPR_POS, IRQ4_PRIORITY, 0); + make_ipr_irq(IRQ5_IRQ, IRQ5_IPR_ADDR, IRQ5_IPR_POS, IRQ5_PRIORITY, 0); +#endif +#endif + +#ifdef CONFIG_CPU_HAS_PINT_IRQ + init_IRQ_pint(); +#endif + +#ifdef CONFIG_CPU_HAS_INTC2_IRQ + 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_HAS_PINT_IRQ) +int ipr_irq_demux(int irq) +{ + return irq; +} +#endif + +EXPORT_SYMBOL(make_ipr_irq); |