2 * arch/mips/ddb5476/nile4.c --
3 * low-level PIC code for NEC Vrc-5476 (Nile 4)
5 * Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
6 * Sony Software Development Center Europe (SDCE), Brussels
8 * Copyright 2001 MontaVista Software Inc.
9 * Author: jsun@mvista.com or jsun@junsun.net
12 #include <linux/config.h>
13 #include <linux/kernel.h>
14 #include <linux/types.h>
15 #include <linux/interrupt.h>
16 #include <linux/ioport.h>
18 #include <asm/addrspace.h>
20 #include <asm/ddb5xxx/ddb5xxx.h>
25 * Interrupt Programming
27 void nile4_map_irq(int nile4_irq, int cpu_irq)
37 t &= ~(7 << (nile4_irq * 4));
38 t |= cpu_irq << (nile4_irq * 4);
42 void nile4_map_irq_all(int cpu_irq)
50 t = ddb_in32(DDB_INTCTRL);
53 ddb_out32(DDB_INTCTRL, t);
54 t = ddb_in32(DDB_INTCTRL + 4);
57 ddb_out32(DDB_INTCTRL + 4, t);
60 void nile4_enable_irq(unsigned int nile4_irq)
76 t |= 8 << (nile4_irq * 4);
81 void nile4_disable_irq(unsigned int nile4_irq)
93 t &= ~(8 << (nile4_irq * 4));
97 void nile4_disable_irq_all(void)
99 ddb_out32(DDB_INTCTRL, 0);
100 ddb_out32(DDB_INTCTRL + 4, 0);
103 u16 nile4_get_irq_stat(int cpu_irq)
105 return ddb_in16(DDB_INTSTAT0 + cpu_irq * 2);
108 void nile4_enable_irq_output(int cpu_irq)
112 t = ddb_in32(DDB_INTSTAT1 + 4);
113 t |= 1 << (16 + cpu_irq);
114 ddb_out32(DDB_INTSTAT1, t);
117 void nile4_disable_irq_output(int cpu_irq)
121 t = ddb_in32(DDB_INTSTAT1 + 4);
122 t &= ~(1 << (16 + cpu_irq));
123 ddb_out32(DDB_INTSTAT1, t);
126 void nile4_set_pci_irq_polarity(int pci_irq, int high)
130 t = ddb_in32(DDB_INTPPES);
132 t &= ~(1 << (pci_irq * 2));
134 t |= 1 << (pci_irq * 2);
135 ddb_out32(DDB_INTPPES, t);
138 void nile4_set_pci_irq_level_or_edge(int pci_irq, int level)
142 t = ddb_in32(DDB_INTPPES);
144 t |= 2 << (pci_irq * 2);
146 t &= ~(2 << (pci_irq * 2));
147 ddb_out32(DDB_INTPPES, t);
150 void nile4_clear_irq(int nile4_irq)
153 ddb_out32(DDB_INTCLR, 1 << nile4_irq);
156 void nile4_clear_irq_mask(u32 mask)
158 ddb_out32(DDB_INTCLR, mask);
161 u8 nile4_i8259_iack(void)
166 /* Set window 0 for interrupt acknowledge */
167 reg = ddb_in32(DDB_PCIINIT0);
169 ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IACK, 0, DDB_PCI_ACCESS_32);
170 irq = *(volatile u8 *) KSEG1ADDR(DDB_PCI_IACK_BASE);
171 /* restore window 0 for PCI I/O space */
172 // ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IO, 0, DDB_PCI_ACCESS_32);
173 ddb_out32(DDB_PCIINIT0, reg);
175 /* i8269.c set the base vector to be 0x0 */
179 static unsigned int nile4_irq_startup(unsigned int irq) {
181 nile4_enable_irq(irq);
186 static void nile4_ack_irq(unsigned int irq) {
190 nile4_clear_irq(irq);
192 nile4_disable_irq(irq);
197 static void nile4_irq_end(unsigned int irq) {
200 if(!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
202 nile4_enable_irq(irq);
209 #define nile4_irq_shutdown nile4_disable_irq
211 static hw_irq_controller nile4_irq_controller = {
213 .startup = nile4_irq_startup,
214 .shutdown = nile4_irq_shutdown,
215 .enable = nile4_enable_irq,
216 .disable = nile4_disable_irq,
217 .ack = nile4_ack_irq,
218 .end = nile4_irq_end,
221 void nile4_irq_setup(u32 base) {
227 /* Map all interrupts to CPU int #0 */
228 nile4_map_irq_all(0);
230 /* PCI INTA#-E# must be level triggered */
231 nile4_set_pci_irq_level_or_edge(0, 1);
232 nile4_set_pci_irq_level_or_edge(1, 1);
233 nile4_set_pci_irq_level_or_edge(2, 1);
234 nile4_set_pci_irq_level_or_edge(3, 1);
235 nile4_set_pci_irq_level_or_edge(4, 1);
237 /* PCI INTA#-D# must be active low, INTE# must be active high */
238 nile4_set_pci_irq_polarity(0, 0);
239 nile4_set_pci_irq_polarity(1, 0);
240 nile4_set_pci_irq_polarity(2, 0);
241 nile4_set_pci_irq_polarity(3, 0);
242 nile4_set_pci_irq_polarity(4, 1);
245 for (i = 0; i < 16; i++) {
247 nile4_disable_irq(i);
250 /* Enable CPU int #0 */
251 nile4_enable_irq_output(0);
253 for (i= base; i< base + NUM_NILE4_INTERRUPTS; i++) {
254 irq_desc[i].status = IRQ_DISABLED;
255 irq_desc[i].action = NULL;
256 irq_desc[i].depth = 1;
257 irq_desc[i].handler = &nile4_irq_controller;
261 #if defined(CONFIG_RUNTIME_DEBUG)
262 void nile4_dump_irq_status(void)
265 CPUSTAT = %p:%p\n", (void *) ddb_in32(DDB_CPUSTAT + 4),
266 (void *) ddb_in32(DDB_CPUSTAT));
268 INTCTRL = %p:%p\n", (void *) ddb_in32(DDB_INTCTRL + 4),
269 (void *) ddb_in32(DDB_INTCTRL));
271 "INTSTAT0 = %p:%p\n",
272 (void *) ddb_in32(DDB_INTSTAT0 + 4),
273 (void *) ddb_in32(DDB_INTSTAT0));
275 "INTSTAT1 = %p:%p\n",
276 (void *) ddb_in32(DDB_INTSTAT1 + 4),
277 (void *) ddb_in32(DDB_INTSTAT1));
279 "INTCLR = %p:%p\n", (void *) ddb_in32(DDB_INTCLR + 4),
280 (void *) ddb_in32(DDB_INTCLR));
282 "INTPPES = %p:%p\n", (void *) ddb_in32(DDB_INTPPES + 4),
283 (void *) ddb_in32(DDB_INTPPES));