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authorYoshinori Sato <ysato@users.sourceforge.jp>2008-02-23 18:23:59 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-23 20:12:16 -0500
commit5cc265a5de169d8e61ad5ba009610467e158fcec (patch)
treea0952af6ad79129a051655f67b022e911f8bbcd4 /arch/h8300/platform/h8s/ints.c
parent4223cc34365e46f5e50d5496623367c552cd8a51 (diff)
h8300: IRQ handling update
- add missing file and declare. - remove unused file and macros. - some cleanup. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/h8300/platform/h8s/ints.c')
-rw-r--r--arch/h8300/platform/h8s/ints.c304
1 files changed, 0 insertions, 304 deletions
diff --git a/arch/h8300/platform/h8s/ints.c b/arch/h8300/platform/h8s/ints.c
deleted file mode 100644
index ac10b978385..00000000000
--- a/arch/h8300/platform/h8s/ints.c
+++ /dev/null
@@ -1,304 +0,0 @@
1/*
2 * linux/arch/h8300/platform/h8s/ints.c
3 *
4 * Yoshinori Sato <ysato@users.sourceforge.jp>
5 *
6 * Based on linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file COPYING in the main directory of this archive
10 * for more details.
11 *
12 * Copyright 1996 Roman Zippel
13 * Copyright 1999 D. Jeff Dionne <jeff@rt-control.com>
14 */
15
16#include <linux/module.h>
17#include <linux/types.h>
18#include <linux/kernel.h>
19#include <linux/sched.h>
20#include <linux/kernel_stat.h>
21#include <linux/seq_file.h>
22#include <linux/init.h>
23#include <linux/interrupt.h>
24#include <linux/bootmem.h>
25#include <linux/random.h>
26#include <linux/hardirq.h>
27
28#include <asm/system.h>
29#include <asm/irq.h>
30#include <asm/traps.h>
31#include <asm/io.h>
32#include <asm/setup.h>
33#include <asm/gpio.h>
34#include <asm/regs267x.h>
35#include <asm/errno.h>
36
37/*
38 * This structure has only 4 elements for speed reasons
39 */
40typedef struct irq_handler {
41 irqreturn_t (*handler)(int, void *, struct pt_regs *);
42 int flags;
43 int count;
44 void *dev_id;
45 const char *devname;
46} irq_handler_t;
47
48static irq_handler_t *irq_list[NR_IRQS];
49
50/* IRQ pin assignment */
51struct irq_pins {
52 unsigned char port_no;
53 unsigned char bit_no;
54};
55/* ISTR = 0 */
56static const struct irq_pins irq_assign_table0[16]={
57 {H8300_GPIO_P5,H8300_GPIO_B0},{H8300_GPIO_P5,H8300_GPIO_B1},
58 {H8300_GPIO_P5,H8300_GPIO_B2},{H8300_GPIO_P5,H8300_GPIO_B3},
59 {H8300_GPIO_P5,H8300_GPIO_B4},{H8300_GPIO_P5,H8300_GPIO_B5},
60 {H8300_GPIO_P5,H8300_GPIO_B6},{H8300_GPIO_P5,H8300_GPIO_B7},
61 {H8300_GPIO_P6,H8300_GPIO_B0},{H8300_GPIO_P6,H8300_GPIO_B1},
62 {H8300_GPIO_P6,H8300_GPIO_B2},{H8300_GPIO_P6,H8300_GPIO_B3},
63 {H8300_GPIO_P6,H8300_GPIO_B4},{H8300_GPIO_P6,H8300_GPIO_B5},
64 {H8300_GPIO_PF,H8300_GPIO_B1},{H8300_GPIO_PF,H8300_GPIO_B2},
65};
66/* ISTR = 1 */
67static const struct irq_pins irq_assign_table1[16]={
68 {H8300_GPIO_P8,H8300_GPIO_B0},{H8300_GPIO_P8,H8300_GPIO_B1},
69 {H8300_GPIO_P8,H8300_GPIO_B2},{H8300_GPIO_P8,H8300_GPIO_B3},
70 {H8300_GPIO_P8,H8300_GPIO_B4},{H8300_GPIO_P8,H8300_GPIO_B5},
71 {H8300_GPIO_PH,H8300_GPIO_B2},{H8300_GPIO_PH,H8300_GPIO_B3},
72 {H8300_GPIO_P2,H8300_GPIO_B0},{H8300_GPIO_P2,H8300_GPIO_B1},
73 {H8300_GPIO_P2,H8300_GPIO_B2},{H8300_GPIO_P2,H8300_GPIO_B3},
74 {H8300_GPIO_P2,H8300_GPIO_B4},{H8300_GPIO_P2,H8300_GPIO_B5},
75 {H8300_GPIO_P2,H8300_GPIO_B6},{H8300_GPIO_P2,H8300_GPIO_B7},
76};
77
78static short use_kmalloc = 0;
79
80extern unsigned long *interrupt_redirect_table;
81
82#define CPU_VECTOR ((unsigned long *)0x000000)
83#define ADDR_MASK (0xffffff)
84
85static inline unsigned long *get_vector_address(void)
86{
87 volatile unsigned long *rom_vector = CPU_VECTOR;
88 unsigned long base,tmp;
89 int vec_no;
90
91 base = rom_vector[EXT_IRQ0] & ADDR_MASK;
92
93 /* check romvector format */
94 for (vec_no = EXT_IRQ1; vec_no <= EXT_IRQ15; vec_no++) {
95 if ((base+(vec_no - EXT_IRQ0)*4) != (rom_vector[vec_no] & ADDR_MASK))
96 return NULL;
97 }
98
99 /* ramvector base address */
100 base -= EXT_IRQ0*4;
101
102 /* writerble check */
103 tmp = ~(*(unsigned long *)base);
104 (*(unsigned long *)base) = tmp;
105 if ((*(unsigned long *)base) != tmp)
106 return NULL;
107 return (unsigned long *)base;
108}
109
110void __init init_IRQ(void)
111{
112#if defined(CONFIG_RAMKERNEL)
113 int i;
114 unsigned long *ramvec,*ramvec_p;
115 unsigned long break_vec;
116
117 ramvec = get_vector_address();
118 if (ramvec == NULL)
119 panic("interrupt vector serup failed.");
120 else
121 printk("virtual vector at 0x%08lx\n",(unsigned long)ramvec);
122
123#if defined(CONFIG_GDB_DEBUG)
124 /* save original break vector */
125 break_vec = ramvec[TRAP3_VEC];
126#else
127 break_vec = VECTOR(trace_break);
128#endif
129
130 /* create redirect table */
131 for (ramvec_p = ramvec, i = 0; i < NR_IRQS; i++)
132 *ramvec_p++ = REDIRECT(interrupt_entry);
133
134 /* set special vector */
135 ramvec[TRAP0_VEC] = VECTOR(system_call);
136 ramvec[TRAP3_VEC] = break_vec;
137 interrupt_redirect_table = ramvec;
138#ifdef DUMP_VECTOR
139 ramvec_p = ramvec;
140 for (i = 0; i < NR_IRQS; i++) {
141 if ((i % 8) == 0)
142 printk("\n%p: ",ramvec_p);
143 printk("%p ",*ramvec_p);
144 ramvec_p++;
145 }
146 printk("\n");
147#endif
148#endif
149}
150
151int request_irq(unsigned int irq,
152 irqreturn_t (*handler)(int, void *, struct pt_regs *),
153 unsigned long flags, const char *devname, void *dev_id)
154{
155 unsigned short ptn = 1 << (irq - EXT_IRQ0);
156 irq_handler_t *irq_handle;
157 if (irq < 0 || irq >= NR_IRQS) {
158 printk("Incorrect IRQ %d from %s\n", irq, devname);
159 return -EINVAL;
160 }
161 if (irq_list[irq])
162 return -EBUSY; /* already used */
163 if (irq >= EXT_IRQ0 && irq <= EXT_IRQ15) {
164 /* initialize IRQ pin */
165 unsigned int port_no,bit_no;
166 if (*(volatile unsigned short *)ITSR & ptn) {
167 port_no = irq_assign_table1[irq - EXT_IRQ0].port_no;
168 bit_no = irq_assign_table1[irq - EXT_IRQ0].bit_no;
169 } else {
170 port_no = irq_assign_table0[irq - EXT_IRQ0].port_no;
171 bit_no = irq_assign_table0[irq - EXT_IRQ0].bit_no;
172 }
173 if (H8300_GPIO_RESERVE(port_no, bit_no) == 0)
174 return -EBUSY; /* pin already use */
175 H8300_GPIO_DDR(port_no, bit_no, H8300_GPIO_INPUT);
176 *(volatile unsigned short *)ISR &= ~ptn; /* ISR clear */
177 }
178
179 if (use_kmalloc)
180 irq_handle = kmalloc(sizeof(irq_handler_t), GFP_ATOMIC);
181 else {
182 /* use bootmem allocator */
183 irq_handle = (irq_handler_t *)alloc_bootmem(sizeof(irq_handler_t));
184 irq_handle = (irq_handler_t *)((unsigned long)irq_handle | 0x80000000);
185 }
186
187 if (irq_handle == NULL)
188 return -ENOMEM;
189
190 irq_handle->handler = handler;
191 irq_handle->flags = flags;
192 irq_handle->count = 0;
193 irq_handle->dev_id = dev_id;
194 irq_handle->devname = devname;
195 irq_list[irq] = irq_handle;
196 if (irq_handle->flags & IRQF_SAMPLE_RANDOM)
197 rand_initialize_irq(irq);
198
199 /* enable interrupt */
200 /* compatible i386 */
201 if (irq >= EXT_IRQ0 && irq <= EXT_IRQ15)
202 *(volatile unsigned short *)IER |= ptn;
203 return 0;
204}
205
206EXPORT_SYMBOL(request_irq);
207
208void free_irq(unsigned int irq, void *dev_id)
209{
210 if (irq >= NR_IRQS)
211 return;
212 if (irq_list[irq]->dev_id != dev_id)
213 printk("%s: Removing probably wrong IRQ %d from %s\n",
214 __FUNCTION__, irq, irq_list[irq]->devname);
215 if (irq >= EXT_IRQ0 && irq <= EXT_IRQ15) {
216 /* disable interrupt & release IRQ pin */
217 unsigned short port_no,bit_no;
218 *(volatile unsigned short *)ISR &= ~(1 << (irq - EXT_IRQ0));
219 *(volatile unsigned short *)IER |= 1 << (irq - EXT_IRQ0);
220 if (*(volatile unsigned short *)ITSR & (1 << (irq - EXT_IRQ0))) {
221 port_no = irq_assign_table1[irq - EXT_IRQ0].port_no;
222 bit_no = irq_assign_table1[irq - EXT_IRQ0].bit_no;
223 } else {
224 port_no = irq_assign_table0[irq - EXT_IRQ0].port_no;
225 bit_no = irq_assign_table0[irq - EXT_IRQ0].bit_no;
226 }
227 H8300_GPIO_FREE(port_no, bit_no);
228 }
229 if (((unsigned long)irq_list[irq] & 0x80000000) == 0) {
230 kfree(irq_list[irq]);
231 irq_list[irq] = NULL;
232 }
233}
234
235EXPORT_SYMBOL(free_irq);
236
237unsigned long probe_irq_on (void)
238{
239 return 0;
240}
241
242EXPORT_SYMBOL(probe_irq_on);
243
244int probe_irq_off (unsigned long irqs)
245{
246 return 0;
247}
248
249EXPORT_SYMBOL(probe_irq_off);
250
251void enable_irq(unsigned int irq)
252{
253 if (irq >= EXT_IRQ0 && irq <= EXT_IRQ15)
254 *(volatile unsigned short *)IER |= 1 << (irq - EXT_IRQ0);
255}
256
257void disable_irq(unsigned int irq)
258{
259 if (irq >= EXT_IRQ0 && irq <= EXT_IRQ15)
260 *(volatile unsigned short *)IER &= ~(1 << (irq - EXT_IRQ0));
261}
262
263asmlinkage void process_int(unsigned long vec, struct pt_regs *fp)
264{
265 irq_enter();
266 /* ISR clear */
267 /* compatible i386 */
268 if (vec >= EXT_IRQ0 && vec <= EXT_IRQ15)
269 *(volatile unsigned short *)ISR &= ~(1 << (vec - EXT_IRQ0));
270 if (vec < NR_IRQS) {
271 if (irq_list[vec]) {
272 irq_list[vec]->handler(vec, irq_list[vec]->dev_id, fp);
273 irq_list[vec]->count++;
274 if (irq_list[vec]->flags & IRQF_SAMPLE_RANDOM)
275 add_interrupt_randomness(vec);
276 }
277 } else {
278 BUG();
279 }
280 irq_exit();
281}
282
283int show_interrupts(struct seq_file *p, void *v)
284{
285 int i = *(loff_t *) v;
286
287 if ((i < NR_IRQS) && (irq_list[i] !=NULL)) {
288 seq_printf(p, "%3d: %10u ",i,irq_list[i]->count);
289 seq_printf(p, "%s\n", irq_list[i]->devname);
290 }
291
292 return 0;
293}
294
295void init_irq_proc(void)
296{
297}
298
299static int __init enable_kmalloc(void)
300{
301 use_kmalloc = 1;
302 return 0;
303}
304core_initcall(enable_kmalloc);
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