1 /* $Id: irq_ipr.c,v 1.1.2.1 2002/11/17 10:53:43 mrbrown Exp $
3 * linux/arch/sh/kernel/irq_ipr.c
5 * Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi
6 * Copyright (C) 2000 Kazumoto Kojima
7 * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
9 * Interrupt handling for IPR-based IRQ.
12 * On-chip supporting modules (TMU, RTC, etc.).
13 * On-chip supporting modules for SH7709/SH7709A/SH7729/SH7300.
14 * Hitachi SolutionEngine external I/O:
15 * MS7709SE01, MS7709ASE01, and MS7750SE01
19 #include <linux/config.h>
20 #include <linux/init.h>
21 #include <linux/irq.h>
22 #include <linux/module.h>
24 #include <asm/system.h>
26 #include <asm/machvec.h>
29 unsigned int addr; /* Address of Interrupt Priority Register */
30 int shift; /* Shifts of the 16-bit data */
31 int priority; /* The priority */
33 static struct ipr_data ipr_data[NR_IRQS];
35 static void enable_ipr_irq(unsigned int irq);
36 static void disable_ipr_irq(unsigned int irq);
38 /* shutdown is same as "disable" */
39 #define shutdown_ipr_irq disable_ipr_irq
41 static void mask_and_ack_ipr(unsigned int);
42 static void end_ipr_irq(unsigned int irq);
44 static unsigned int startup_ipr_irq(unsigned int irq)
47 return 0; /* never anything pending */
50 static struct hw_interrupt_type ipr_irq_type = {
60 static void disable_ipr_irq(unsigned int irq)
62 unsigned long val, flags;
63 unsigned int addr = ipr_data[irq].addr;
64 unsigned short mask = 0xffff ^ (0x0f << ipr_data[irq].shift);
66 /* Set the priority in IPR to 0 */
67 local_irq_save(flags);
71 local_irq_restore(flags);
74 static void enable_ipr_irq(unsigned int irq)
76 unsigned long val, flags;
77 unsigned int addr = ipr_data[irq].addr;
78 int priority = ipr_data[irq].priority;
79 unsigned short value = (priority << ipr_data[irq].shift);
81 /* Set priority in IPR back to original value */
82 local_irq_save(flags);
86 local_irq_restore(flags);
89 static void mask_and_ack_ipr(unsigned int irq)
93 #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
94 defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
95 /* This is needed when we use edge triggered setting */
96 /* XXX: Is it really needed? */
97 if (IRQ0_IRQ <= irq && irq <= IRQ5_IRQ) {
98 /* Clear external interrupt request */
99 int a = ctrl_inb(INTC_IRR0);
100 a &= ~(1 << (irq - IRQ0_IRQ));
101 ctrl_outb(a, INTC_IRR0);
106 static void end_ipr_irq(unsigned int irq)
108 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
112 void make_ipr_irq(unsigned int irq, unsigned int addr, int pos, int priority)
114 disable_irq_nosync(irq);
115 ipr_data[irq].addr = addr;
116 ipr_data[irq].shift = pos*4; /* POSition (0-3) x 4 means shift */
117 ipr_data[irq].priority = priority;
119 irq_desc[irq].handler = &ipr_irq_type;
120 disable_ipr_irq(irq);
123 #if defined(CONFIG_CPU_SUBTYPE_SH7705) || \
124 defined(CONFIG_CPU_SUBTYPE_SH7707) || \
125 defined(CONFIG_CPU_SUBTYPE_SH7709)
126 static unsigned char pint_map[256];
127 static unsigned long portcr_mask = 0;
129 static void enable_pint_irq(unsigned int irq);
130 static void disable_pint_irq(unsigned int irq);
132 /* shutdown is same as "disable" */
133 #define shutdown_pint_irq disable_pint_irq
135 static void mask_and_ack_pint(unsigned int);
136 static void end_pint_irq(unsigned int irq);
138 static unsigned int startup_pint_irq(unsigned int irq)
140 enable_pint_irq(irq);
141 return 0; /* never anything pending */
144 static struct hw_interrupt_type pint_irq_type = {
154 static void disable_pint_irq(unsigned int irq)
156 unsigned long val, flags;
158 local_irq_save(flags);
159 val = ctrl_inw(INTC_INTER);
160 val &= ~(1 << (irq - PINT_IRQ_BASE));
161 ctrl_outw(val, INTC_INTER); /* disable PINTn */
162 portcr_mask &= ~(3 << (irq - PINT_IRQ_BASE)*2);
163 local_irq_restore(flags);
166 static void enable_pint_irq(unsigned int irq)
168 unsigned long val, flags;
170 local_irq_save(flags);
171 val = ctrl_inw(INTC_INTER);
172 val |= 1 << (irq - PINT_IRQ_BASE);
173 ctrl_outw(val, INTC_INTER); /* enable PINTn */
174 portcr_mask |= 3 << (irq - PINT_IRQ_BASE)*2;
175 local_irq_restore(flags);
178 static void mask_and_ack_pint(unsigned int irq)
180 disable_pint_irq(irq);
183 static void end_pint_irq(unsigned int irq)
185 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
186 enable_pint_irq(irq);
189 void make_pint_irq(unsigned int irq)
191 disable_irq_nosync(irq);
192 irq_desc[irq].handler = &pint_irq_type;
193 disable_pint_irq(irq);
197 void __init init_IRQ(void)
199 #if defined(CONFIG_CPU_SUBTYPE_SH7705) || \
200 defined(CONFIG_CPU_SUBTYPE_SH7707) || \
201 defined(CONFIG_CPU_SUBTYPE_SH7709)
205 make_ipr_irq(TIMER_IRQ, TIMER_IPR_ADDR, TIMER_IPR_POS, TIMER_PRIORITY);
206 make_ipr_irq(TIMER1_IRQ, TIMER1_IPR_ADDR, TIMER1_IPR_POS, TIMER1_PRIORITY);
207 #if defined(CONFIG_SH_RTC)
208 make_ipr_irq(RTC_IRQ, RTC_IPR_ADDR, RTC_IPR_POS, RTC_PRIORITY);
212 make_ipr_irq(SCI_ERI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
213 make_ipr_irq(SCI_RXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
214 make_ipr_irq(SCI_TXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
218 make_ipr_irq(SCIF1_ERI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
219 make_ipr_irq(SCIF1_RXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
220 make_ipr_irq(SCIF1_BRI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
221 make_ipr_irq(SCIF1_TXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
224 #if defined(CONFIG_CPU_SUBTYPE_SH7300)
225 make_ipr_irq(SCIF0_IRQ, SCIF0_IPR_ADDR, SCIF0_IPR_POS, SCIF0_PRIORITY);
226 make_ipr_irq(DMTE2_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
227 make_ipr_irq(DMTE3_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
228 make_ipr_irq(VIO_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY);
232 make_ipr_irq(SCIF_ERI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
233 make_ipr_irq(SCIF_RXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
234 make_ipr_irq(SCIF_BRI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
235 make_ipr_irq(SCIF_TXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
239 make_ipr_irq(IRDA_ERI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
240 make_ipr_irq(IRDA_RXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
241 make_ipr_irq(IRDA_BRI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
242 make_ipr_irq(IRDA_TXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
245 #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
246 defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
248 * Initialize the Interrupt Controller (INTC)
249 * registers to their power on values
253 * Enable external irq (INTC IRQ mode).
254 * You should set corresponding bits of PFC to "00"
255 * to enable these interrupts.
257 make_ipr_irq(IRQ0_IRQ, IRQ0_IPR_ADDR, IRQ0_IPR_POS, IRQ0_PRIORITY);
258 make_ipr_irq(IRQ1_IRQ, IRQ1_IPR_ADDR, IRQ1_IPR_POS, IRQ1_PRIORITY);
259 make_ipr_irq(IRQ2_IRQ, IRQ2_IPR_ADDR, IRQ2_IPR_POS, IRQ2_PRIORITY);
260 make_ipr_irq(IRQ3_IRQ, IRQ3_IPR_ADDR, IRQ3_IPR_POS, IRQ3_PRIORITY);
261 make_ipr_irq(IRQ4_IRQ, IRQ4_IPR_ADDR, IRQ4_IPR_POS, IRQ4_PRIORITY);
262 make_ipr_irq(IRQ5_IRQ, IRQ5_IPR_ADDR, IRQ5_IPR_POS, IRQ5_PRIORITY);
263 #if !defined(CONFIG_CPU_SUBTYPE_SH7300)
264 make_ipr_irq(PINT0_IRQ, PINT0_IPR_ADDR, PINT0_IPR_POS, PINT0_PRIORITY);
265 make_ipr_irq(PINT8_IRQ, PINT8_IPR_ADDR, PINT8_IPR_POS, PINT8_PRIORITY);
266 enable_ipr_irq(PINT0_IRQ);
267 enable_ipr_irq(PINT8_IRQ);
269 for(i = 0; i < 16; i++)
270 make_pint_irq(PINT_IRQ_BASE + i);
271 for(i = 0; i < 256; i++)
273 if(i & 1) pint_map[i] = 0;
274 else if(i & 2) pint_map[i] = 1;
275 else if(i & 4) pint_map[i] = 2;
276 else if(i & 8) pint_map[i] = 3;
277 else if(i & 0x10) pint_map[i] = 4;
278 else if(i & 0x20) pint_map[i] = 5;
279 else if(i & 0x40) pint_map[i] = 6;
280 else if(i & 0x80) pint_map[i] = 7;
282 #endif /* !CONFIG_CPU_SUBTYPE_SH7300 */
283 #endif /* CONFIG_CPU_SUBTYPE_SH7707 || CONFIG_CPU_SUBTYPE_SH7709 || CONFIG_CPU_SUBTYPE_SH7300*/
285 #ifdef CONFIG_CPU_SUBTYPE_ST40
289 /* Perform the machine specific initialisation */
290 if (sh_mv.mv_init_irq != NULL) {
294 #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
295 defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
296 int ipr_irq_demux(int irq)
298 #if !defined(CONFIG_CPU_SUBTYPE_SH7300)
299 unsigned long creg, dreg, d, sav;
303 #if defined(CONFIG_CPU_SUBTYPE_SH7707)
310 sav = ctrl_inw(creg);
311 ctrl_outw(sav | portcr_mask, creg);
312 d = (~ctrl_inb(dreg) ^ ctrl_inw(INTC_ICR2)) & ctrl_inw(INTC_INTER) & 0xff;
313 ctrl_outw(sav, creg);
314 if(d == 0) return irq;
315 return PINT_IRQ_BASE + pint_map[d];
317 else if(irq == PINT8_IRQ)
319 #if defined(CONFIG_CPU_SUBTYPE_SH7707)
326 sav = ctrl_inw(creg);
327 ctrl_outw(sav | (portcr_mask >> 16), creg);
328 d = (~ctrl_inb(dreg) ^ (ctrl_inw(INTC_ICR2) >> 8)) & (ctrl_inw(INTC_INTER) >> 8) & 0xff;
329 ctrl_outw(sav, creg);
330 if(d == 0) return irq;
331 return PINT_IRQ_BASE + 8 + pint_map[d];
338 EXPORT_SYMBOL(make_ipr_irq);