/arch/mips/ddb5xxx/ddb5476/nile4_pic.c

  1/*
  2 *  arch/mips/ddb5476/nile4.c --
  3 *  	low-level PIC code for NEC Vrc-5476 (Nile 4)
  4 *
  5 *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
  6 *                     Sony Software Development Center Europe (SDCE), Brussels
  7 *
  8 *  Copyright 2001 MontaVista Software Inc.
  9 *  Author: jsun@mvista.com or jsun@junsun.net
 10 *
 11 */
 12#include <linux/config.h>
 13#include <linux/kernel.h>
 14#include <linux/types.h>
 15
 16#include <asm/addrspace.h>
 17
 18#include <asm/ddb5xxx/ddb5xxx.h>
 19
 20
 21/*
 22 *  Interrupt Programming
 23 */
 24void nile4_map_irq(int nile4_irq, int cpu_irq)
 25{
 26	u32 offset, t;
 27
 28	offset = DDB_INTCTRL;
 29	if (nile4_irq >= 8) {
 30		offset += 4;
 31		nile4_irq -= 8;
 32	}
 33	t = ddb_in32(offset);
 34	t &= ~(7 << (nile4_irq * 4));
 35	t |= cpu_irq << (nile4_irq * 4);
 36	ddb_out32(offset, t);
 37}
 38
 39void nile4_map_irq_all(int cpu_irq)
 40{
 41	u32 all, t;
 42
 43	all = cpu_irq;
 44	all |= all << 4;
 45	all |= all << 8;
 46	all |= all << 16;
 47	t = ddb_in32(DDB_INTCTRL);
 48	t &= 0x88888888;
 49	t |= all;
 50	ddb_out32(DDB_INTCTRL, t);
 51	t = ddb_in32(DDB_INTCTRL + 4);
 52	t &= 0x88888888;
 53	t |= all;
 54	ddb_out32(DDB_INTCTRL + 4, t);
 55}
 56
 57void nile4_enable_irq(int nile4_irq)
 58{
 59	u32 offset, t;
 60
 61	offset = DDB_INTCTRL;
 62	if (nile4_irq >= 8) {
 63		offset += 4;
 64		nile4_irq -= 8;
 65	}
 66	t = ddb_in32(offset);
 67	t |= 8 << (nile4_irq * 4);
 68	ddb_out32(offset, t);
 69}
 70
 71void nile4_disable_irq(int nile4_irq)
 72{
 73	u32 offset, t;
 74
 75	offset = DDB_INTCTRL;
 76	if (nile4_irq >= 8) {
 77		offset += 4;
 78		nile4_irq -= 8;
 79	}
 80	t = ddb_in32(offset);
 81	t &= ~(8 << (nile4_irq * 4));
 82	ddb_out32(offset, t);
 83}
 84
 85void nile4_disable_irq_all(void)
 86{
 87	ddb_out32(DDB_INTCTRL, 0);
 88	ddb_out32(DDB_INTCTRL + 4, 0);
 89}
 90
 91u16 nile4_get_irq_stat(int cpu_irq)
 92{
 93	return ddb_in16(DDB_INTSTAT0 + cpu_irq * 2);
 94}
 95
 96void nile4_enable_irq_output(int cpu_irq)
 97{
 98	u32 t;
 99
100	t = ddb_in32(DDB_INTSTAT1 + 4);
101	t |= 1 << (16 + cpu_irq);
102	ddb_out32(DDB_INTSTAT1, t);
103}
104
105void nile4_disable_irq_output(int cpu_irq)
106{
107	u32 t;
108
109	t = ddb_in32(DDB_INTSTAT1 + 4);
110	t &= ~(1 << (16 + cpu_irq));
111	ddb_out32(DDB_INTSTAT1, t);
112}
113
114void nile4_set_pci_irq_polarity(int pci_irq, int high)
115{
116	u32 t;
117
118	t = ddb_in32(DDB_INTPPES);
119	if (high)
120		t &= ~(1 << (pci_irq * 2));
121	else
122		t |= 1 << (pci_irq * 2);
123	ddb_out32(DDB_INTPPES, t);
124}
125
126void nile4_set_pci_irq_level_or_edge(int pci_irq, int level)
127{
128	u32 t;
129
130	t = ddb_in32(DDB_INTPPES);
131	if (level)
132		t |= 2 << (pci_irq * 2);
133	else
134		t &= ~(2 << (pci_irq * 2));
135	ddb_out32(DDB_INTPPES, t);
136}
137
138void nile4_clear_irq(int nile4_irq)
139{
140	ddb_out32(DDB_INTCLR, 1 << nile4_irq);
141}
142
143void nile4_clear_irq_mask(u32 mask)
144{
145	ddb_out32(DDB_INTCLR, mask);
146}
147
148u8 nile4_i8259_iack(void)
149{
150	u8 irq;
151	u32 reg;
152
153	/* Set window 0 for interrupt acknowledge */
154	reg = ddb_in32(DDB_PCIINIT0);
155
156	ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IACK, 0, DDB_PCI_ACCESS_32);
157	irq = *(volatile u8 *) KSEG1ADDR(DDB_PCI_IACK_BASE);
158	/* restore window 0 for PCI I/O space */
159	// ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IO, 0, DDB_PCI_ACCESS_32);
160	ddb_out32(DDB_PCIINIT0, reg);
161
162	/* i8269.c set the base vector to be 0x0 */
163	return irq + I8259_IRQ_BASE;
164}
165
166#if defined(CONFIG_RUNTIME_DEBUG)
167void nile4_dump_irq_status(void)
168{
169	printk(KERN_DEBUG "
170	       CPUSTAT = %p:%p\n", (void *) ddb_in32(DDB_CPUSTAT + 4),
171	       (void *) ddb_in32(DDB_CPUSTAT));
172	printk(KERN_DEBUG "
173	       INTCTRL = %p:%p\n", (void *) ddb_in32(DDB_INTCTRL + 4),
174	       (void *) ddb_in32(DDB_INTCTRL));
175	printk(KERN_DEBUG
176	       "INTSTAT0 = %p:%p\n",
177	       (void *) ddb_in32(DDB_INTSTAT0 + 4),
178	       (void *) ddb_in32(DDB_INTSTAT0));
179	printk(KERN_DEBUG
180	       "INTSTAT1 = %p:%p\n",
181	       (void *) ddb_in32(DDB_INTSTAT1 + 4),
182	       (void *) ddb_in32(DDB_INTSTAT1));
183	printk(KERN_DEBUG
184	       "INTCLR = %p:%p\n", (void *) ddb_in32(DDB_INTCLR + 4),
185	       (void *) ddb_in32(DDB_INTCLR));
186	printk(KERN_DEBUG
187	       "INTPPES = %p:%p\n", (void *) ddb_in32(DDB_INTPPES + 4),
188	       (void *) ddb_in32(DDB_INTPPES));
189}
190#endif