diff options
Diffstat (limited to 'arch/sh/cchips/hd6446x/hd64461/setup.c')
| -rw-r--r-- | arch/sh/cchips/hd6446x/hd64461/setup.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/arch/sh/cchips/hd6446x/hd64461/setup.c b/arch/sh/cchips/hd6446x/hd64461/setup.c new file mode 100644 index 000000000000..f014b9bf6922 --- /dev/null +++ b/arch/sh/cchips/hd6446x/hd64461/setup.c @@ -0,0 +1,171 @@ +/* + * $Id: setup.c,v 1.5 2004/03/16 00:07:50 lethal Exp $ + * Copyright (C) 2000 YAEGASHI Takeshi + * Hitachi HD64461 companion chip support + */ + +#include <linux/config.h> +#include <linux/sched.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/param.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/irq.h> + +#include <asm/io.h> +#include <asm/irq.h> + +#include <asm/hd64461/hd64461.h> + +static void disable_hd64461_irq(unsigned int irq) +{ + unsigned long flags; + unsigned short nimr; + unsigned short mask = 1 << (irq - HD64461_IRQBASE); + + local_irq_save(flags); + nimr = inw(HD64461_NIMR); + nimr |= mask; + outw(nimr, HD64461_NIMR); + local_irq_restore(flags); +} + +static void enable_hd64461_irq(unsigned int irq) +{ + unsigned long flags; + unsigned short nimr; + unsigned short mask = 1 << (irq - HD64461_IRQBASE); + + local_irq_save(flags); + nimr = inw(HD64461_NIMR); + nimr &= ~mask; + outw(nimr, HD64461_NIMR); + local_irq_restore(flags); +} + +static void mask_and_ack_hd64461(unsigned int irq) +{ + disable_hd64461_irq(irq); +#ifdef CONFIG_HD64461_ENABLER + if (irq == HD64461_IRQBASE + 13) + outb(0x00, HD64461_PCC1CSCR); +#endif +} + +static void end_hd64461_irq(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) + enable_hd64461_irq(irq); +} + +static unsigned int startup_hd64461_irq(unsigned int irq) +{ + enable_hd64461_irq(irq); + return 0; +} + +static void shutdown_hd64461_irq(unsigned int irq) +{ + disable_hd64461_irq(irq); +} + +static struct hw_interrupt_type hd64461_irq_type = { + .typename = "HD64461-IRQ", + .startup = startup_hd64461_irq, + .shutdown = shutdown_hd64461_irq, + .enable = enable_hd64461_irq, + .disable = disable_hd64461_irq, + .ack = mask_and_ack_hd64461, + .end = end_hd64461_irq, +}; + +static irqreturn_t hd64461_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + printk(KERN_INFO + "HD64461: spurious interrupt, nirr: 0x%x nimr: 0x%x\n", + inw(HD64461_NIRR), inw(HD64461_NIMR)); + + return IRQ_NONE; +} + +static struct { + int (*func) (int, void *); + void *dev; +} hd64461_demux[HD64461_IRQ_NUM]; + +void hd64461_register_irq_demux(int irq, + int (*demux) (int irq, void *dev), void *dev) +{ + hd64461_demux[irq - HD64461_IRQBASE].func = demux; + hd64461_demux[irq - HD64461_IRQBASE].dev = dev; +} + +EXPORT_SYMBOL(hd64461_register_irq_demux); + +void hd64461_unregister_irq_demux(int irq) +{ + hd64461_demux[irq - HD64461_IRQBASE].func = 0; +} + +EXPORT_SYMBOL(hd64461_unregister_irq_demux); + +int hd64461_irq_demux(int irq) +{ + if (irq == CONFIG_HD64461_IRQ) { + unsigned short bit; + unsigned short nirr = inw(HD64461_NIRR); + unsigned short nimr = inw(HD64461_NIMR); + int i; + + nirr &= ~nimr; + for (bit = 1, i = 0; i < 16; bit <<= 1, i++) + if (nirr & bit) + break; + if (i == 16) + irq = CONFIG_HD64461_IRQ; + else { + irq = HD64461_IRQBASE + i; + if (hd64461_demux[i].func != 0) { + irq = hd64461_demux[i].func(irq, hd64461_demux[i].dev); + } + } + } + return __irq_demux(irq); +} + +static struct irqaction irq0 = { hd64461_interrupt, SA_INTERRUPT, CPU_MASK_NONE, "HD64461", NULL, NULL }; + +int __init setup_hd64461(void) +{ + int i; + + if (!MACH_HD64461) + return 0; + + printk(KERN_INFO + "HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n", + CONFIG_HD64461_IOBASE, CONFIG_HD64461_IRQ, HD64461_IRQBASE, + HD64461_IRQBASE + 15); + +#if defined(CONFIG_CPU_SUBTYPE_SH7709) /* Should be at processor specific part.. */ + outw(0x2240, INTC_ICR1); +#endif + outw(0xffff, HD64461_NIMR); + + for (i = HD64461_IRQBASE; i < HD64461_IRQBASE + 16; i++) { + irq_desc[i].handler = &hd64461_irq_type; + } + + setup_irq(CONFIG_HD64461_IRQ, &irq0); + +#ifdef CONFIG_HD64461_ENABLER + printk(KERN_INFO "HD64461: enabling PCMCIA devices\n"); + outb(0x4c, HD64461_PCC1CSCIER); + outb(0x00, HD64461_PCC1CSCR); +#endif + + return 0; +} + +module_init(setup_hd64461); |