/* *  arch/mips/ddb5074/nile4.c -- NEC Vrc-5074 Nile 4 support routines * *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com> *                     Sony Software Development Center Europe (SDCE), Brussels */#include <linux/kernel.h>#include <linux/types.h>#include <asm/nile4.h>/* *  Physical Device Address Registers * *  Note: 32 bit addressing only! */void nile4_set_pdar(u32 pdar, u32 phys, u32 size, int width,		    int on_memory_bus, int visible){	u32 maskbits;	u32 widthbits;	if (pdar > NILE4_BOOTCS || (pdar & 7)) {		printk("nile4_set_pdar: invalid pdar %d\n", pdar);		return;	}	if (pdar == NILE4_INTCS && size != 0x00200000) {		printk("nile4_set_pdar: INTCS size must be 2 MB\n");		return;	}	switch (size) {#if 0				/* We don't support 4 GB yet */	case 0x100000000:	/* 4 GB */		maskbits = 4;		break;#endif	case 0x80000000:	/* 2 GB */		maskbits = 5;		break;	case 0x40000000:	/* 1 GB */		maskbits = 6;		break;	case 0x20000000:	/* 512 MB */		maskbits = 7;		break;	case 0x10000000:	/* 256 MB */		maskbits = 8;		break;	case 0x08000000:	/* 128 MB */		maskbits = 9;		break;	case 0x04000000:	/* 64 MB */		maskbits = 10;		break;	case 0x02000000:	/* 32 MB */		maskbits = 11;		break;	case 0x01000000:	/* 16 MB */		maskbits = 12;		break;	case 0x00800000:	/* 8 MB */		maskbits = 13;		break;	case 0x00400000:	/* 4 MB */		maskbits = 14;		break;	case 0x00200000:	/* 2 MB */		maskbits = 15;		break;	case 0:		/* OFF */		maskbits = 0;		break;	default:		printk("nile4_set_pdar: unsupported size %p\n", (void *) size);		return;	}	switch (width) {	case 8:		widthbits = 0;		break;	case 16:		widthbits = 1;		break;	case 32:		widthbits = 2;		break;	case 64:		widthbits = 3;		break;	default:		printk("nile4_set_pdar: unsupported width %d\n", width);		return;	}	nile4_out32(pdar, maskbits | (on_memory_bus ? 0x10 : 0) |		    (visible ? 0x20 : 0) | (widthbits << 6) |		    (phys & 0xffe00000));	nile4_out32(pdar + 4, 0);	/*	 * When programming a PDAR, the register should be read immediately	 * after writing it. This ensures that address decoders are properly	 * configured.	 */	nile4_in32(pdar);	nile4_in32(pdar + 4);}/* *  PCI Master Registers * *  Note: 32 bit addressing only! */void nile4_set_pmr(u32 pmr, u32 type, u32 addr){	if (pmr != NILE4_PCIINIT0 && pmr != NILE4_PCIINIT1) {		printk("nile4_set_pmr: invalid pmr %d\n", pmr);		return;	}	switch (type) {	case NILE4_PCICMD_IACK:	/* PCI Interrupt Acknowledge */	case NILE4_PCICMD_IO:	/* PCI I/O Space */	case NILE4_PCICMD_MEM:	/* PCI Memory Space */	case NILE4_PCICMD_CFG:	/* PCI Configuration Space */		break;	default:		printk("nile4_set_pmr: invalid type %d\n", type);		return;	}	nile4_out32(pmr, (type << 1) | 0x10 | (addr & 0xffe00000));	nile4_out32(pmr + 4, 0);}/* *  Interrupt Programming */void nile4_map_irq(int nile4_irq, int cpu_irq){	u32 offset, t;	offset = NILE4_INTCTRL;	if (nile4_irq >= 8) {		offset += 4;		nile4_irq -= 8;	}	t = nile4_in32(offset);	t &= ~(7 << (nile4_irq * 4));	t |= cpu_irq << (nile4_irq * 4);	nile4_out32(offset, t);}void nile4_map_irq_all(int cpu_irq){	u32 all, t;	all = cpu_irq;	all |= all << 4;	all |= all << 8;	all |= all << 16;	t = nile4_in32(NILE4_INTCTRL);	t &= 0x88888888;	t |= all;	nile4_out32(NILE4_INTCTRL, t);	t = nile4_in32(NILE4_INTCTRL + 4);	t &= 0x88888888;	t |= all;	nile4_out32(NILE4_INTCTRL + 4, t);}void nile4_enable_irq(int nile4_irq){	u32 offset, t;	offset = NILE4_INTCTRL;	if (nile4_irq >= 8) {		offset += 4;		nile4_irq -= 8;	}	t = nile4_in32(offset);	t |= 8 << (nile4_irq * 4);	nile4_out32(offset, t);}void nile4_disable_irq(int nile4_irq){	u32 offset, t;	offset = NILE4_INTCTRL;	if (nile4_irq >= 8) {		offset += 4;		nile4_irq -= 8;	}	t = nile4_in32(offset);	t &= ~(8 << (nile4_irq * 4));	nile4_out32(offset, t);}void nile4_disable_irq_all(void){	nile4_out32(NILE4_INTCTRL, 0);	nile4_out32(NILE4_INTCTRL + 4, 0);}u16 nile4_get_irq_stat(int cpu_irq){	return nile4_in16(NILE4_INTSTAT0 + cpu_irq * 2);}void nile4_enable_irq_output(int cpu_irq){	u32 t;	t = nile4_in32(NILE4_INTSTAT1 + 4);	t |= 1 << (16 + cpu_irq);	nile4_out32(NILE4_INTSTAT1, t);}void nile4_disable_irq_output(int cpu_irq){	u32 t;	t = nile4_in32(NILE4_INTSTAT1 + 4);	t &= ~(1 << (16 + cpu_irq));	nile4_out32(NILE4_INTSTAT1, t);}void nile4_set_pci_irq_polarity(int pci_irq, int high){	u32 t;	t = nile4_in32(NILE4_INTPPES);	if (high)		t &= ~(1 << (pci_irq * 2));	else		t |= 1 << (pci_irq * 2);	nile4_out32(NILE4_INTPPES, t);}void nile4_set_pci_irq_level_or_edge(int pci_irq, int level){	u32 t;	t = nile4_in32(NILE4_INTPPES);	if (level)		t |= 2 << (pci_irq * 2);	else		t &= ~(2 << (pci_irq * 2));	nile4_out32(NILE4_INTPPES, t);}void nile4_clear_irq(int nile4_irq){	nile4_out32(NILE4_INTCLR, 1 << nile4_irq);}void nile4_clear_irq_mask(u32 mask){	nile4_out32(NILE4_INTCLR, mask);}u8 nile4_i8259_iack(void){	u8 irq;	/* Set window 0 for interrupt acknowledge */	nile4_set_pmr(NILE4_PCIINIT0, NILE4_PCICMD_IACK, 0);	irq = *(volatile u8 *) NILE4_PCI_IACK_BASE;	/* Set window 0 for PCI I/O space */	nile4_set_pmr(NILE4_PCIINIT0, NILE4_PCICMD_IO, 0);	return irq;}#if 0void nile4_dump_irq_status(void){	printk("CPUSTAT = %p:%p\n", (void *) nile4_in32(NILE4_CPUSTAT + 4),	       (void *) nile4_in32(NILE4_CPUSTAT));	printk("INTCTRL = %p:%p\n", (void *) nile4_in32(NILE4_INTCTRL + 4),	       (void *) nile4_in32(NILE4_INTCTRL));	printk("INTSTAT0 = %p:%p\n",	       (void *) nile4_in32(NILE4_INTSTAT0 + 4),	       (void *) nile4_in32(NILE4_INTSTAT0));	printk("INTSTAT1 = %p:%p\n",	       (void *) nile4_in32(NILE4_INTSTAT1 + 4),	       (void *) nile4_in32(NILE4_INTSTAT1));	printk("INTCLR = %p:%p\n", (void *) nile4_in32(NILE4_INTCLR + 4),	       (void *) nile4_in32(NILE4_INTCLR));	printk("INTPPES = %p:%p\n", (void *) nile4_in32(NILE4_INTPPES + 4),	       (void *) nile4_in32(NILE4_INTPPES));}#endif