2 * arch/sh/kernel/cpu/irq/ipr.c
4 * Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi
5 * Copyright (C) 2000 Kazumoto Kojima
6 * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
8 * Interrupt handling for IPR-based IRQ.
11 * On-chip supporting modules (TMU, RTC, etc.).
12 * On-chip supporting modules for SH7709/SH7709A/SH7729/SH7300.
13 * Hitachi SolutionEngine external I/O:
14 * MS7709SE01, MS7709ASE01, and MS7750SE01
18 #include <linux/config.h>
19 #include <linux/init.h>
20 #include <linux/irq.h>
21 #include <linux/module.h>
23 #include <asm/system.h>
25 #include <asm/machvec.h>
28 unsigned int addr; /* Address of Interrupt Priority Register */
29 int shift; /* Shifts of the 16-bit data */
30 int priority; /* The priority */
32 static struct ipr_data ipr_data[NR_IRQS];
34 static void enable_ipr_irq(unsigned int irq);
35 static void disable_ipr_irq(unsigned int irq);
37 /* shutdown is same as "disable" */
38 #define shutdown_ipr_irq disable_ipr_irq
40 static void mask_and_ack_ipr(unsigned int);
41 static void end_ipr_irq(unsigned int irq);
43 static unsigned int startup_ipr_irq(unsigned int irq)
46 return 0; /* never anything pending */
49 static struct hw_interrupt_type ipr_irq_type = {
50 .typename = "IPR-IRQ",
51 .startup = startup_ipr_irq,
52 .shutdown = shutdown_ipr_irq,
53 .enable = enable_ipr_irq,
54 .disable = disable_ipr_irq,
55 .ack = mask_and_ack_ipr,
59 static void disable_ipr_irq(unsigned int irq)
61 unsigned long val, flags;
62 unsigned int addr = ipr_data[irq].addr;
63 unsigned short mask = 0xffff ^ (0x0f << ipr_data[irq].shift);
65 /* Set the priority in IPR to 0 */
66 local_irq_save(flags);
70 local_irq_restore(flags);
73 static void enable_ipr_irq(unsigned int irq)
75 unsigned long val, flags;
76 unsigned int addr = ipr_data[irq].addr;
77 int priority = ipr_data[irq].priority;
78 unsigned short value = (priority << ipr_data[irq].shift);
80 /* Set priority in IPR back to original value */
81 local_irq_save(flags);
85 local_irq_restore(flags);
88 static void mask_and_ack_ipr(unsigned int irq)
92 #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
93 defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
94 /* This is needed when we use edge triggered setting */
95 /* XXX: Is it really needed? */
96 if (IRQ0_IRQ <= irq && irq <= IRQ5_IRQ) {
97 /* Clear external interrupt request */
98 int a = ctrl_inb(INTC_IRR0);
99 a &= ~(1 << (irq - IRQ0_IRQ));
100 ctrl_outb(a, INTC_IRR0);
105 static void end_ipr_irq(unsigned int irq)
107 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
111 void make_ipr_irq(unsigned int irq, unsigned int addr, int pos, int priority)
113 disable_irq_nosync(irq);
114 ipr_data[irq].addr = addr;
115 ipr_data[irq].shift = pos*4; /* POSition (0-3) x 4 means shift */
116 ipr_data[irq].priority = priority;
118 irq_desc[irq].handler = &ipr_irq_type;
119 disable_ipr_irq(irq);
122 void __init init_IRQ(void)
124 #ifndef CONFIG_CPU_SUBTYPE_SH7780
125 make_ipr_irq(TIMER_IRQ, TIMER_IPR_ADDR, TIMER_IPR_POS, TIMER_PRIORITY);
126 make_ipr_irq(TIMER1_IRQ, TIMER1_IPR_ADDR, TIMER1_IPR_POS, TIMER1_PRIORITY);
127 #if defined(CONFIG_SH_RTC)
128 make_ipr_irq(RTC_IRQ, RTC_IPR_ADDR, RTC_IPR_POS, RTC_PRIORITY);
132 make_ipr_irq(SCI_ERI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
133 make_ipr_irq(SCI_RXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
134 make_ipr_irq(SCI_TXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
138 make_ipr_irq(SCIF1_ERI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
139 make_ipr_irq(SCIF1_RXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
140 make_ipr_irq(SCIF1_BRI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
141 make_ipr_irq(SCIF1_TXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
144 #if defined(CONFIG_CPU_SUBTYPE_SH7300)
145 make_ipr_irq(SCIF0_IRQ, SCIF0_IPR_ADDR, SCIF0_IPR_POS, SCIF0_PRIORITY);
146 make_ipr_irq(DMTE2_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
147 make_ipr_irq(DMTE3_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
148 make_ipr_irq(VIO_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY);
152 make_ipr_irq(SCIF_ERI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
153 make_ipr_irq(SCIF_RXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
154 make_ipr_irq(SCIF_BRI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
155 make_ipr_irq(SCIF_TXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
159 make_ipr_irq(IRDA_ERI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
160 make_ipr_irq(IRDA_RXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
161 make_ipr_irq(IRDA_BRI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
162 make_ipr_irq(IRDA_TXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
165 #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
166 defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
168 * Initialize the Interrupt Controller (INTC)
169 * registers to their power on values
173 * Enable external irq (INTC IRQ mode).
174 * You should set corresponding bits of PFC to "00"
175 * to enable these interrupts.
177 make_ipr_irq(IRQ0_IRQ, IRQ0_IPR_ADDR, IRQ0_IPR_POS, IRQ0_PRIORITY);
178 make_ipr_irq(IRQ1_IRQ, IRQ1_IPR_ADDR, IRQ1_IPR_POS, IRQ1_PRIORITY);
179 make_ipr_irq(IRQ2_IRQ, IRQ2_IPR_ADDR, IRQ2_IPR_POS, IRQ2_PRIORITY);
180 make_ipr_irq(IRQ3_IRQ, IRQ3_IPR_ADDR, IRQ3_IPR_POS, IRQ3_PRIORITY);
181 make_ipr_irq(IRQ4_IRQ, IRQ4_IPR_ADDR, IRQ4_IPR_POS, IRQ4_PRIORITY);
182 make_ipr_irq(IRQ5_IRQ, IRQ5_IPR_ADDR, IRQ5_IPR_POS, IRQ5_PRIORITY);
186 #ifdef CONFIG_CPU_HAS_PINT_IRQ
190 #ifdef CONFIG_CPU_HAS_INTC2_IRQ
193 /* Perform the machine specific initialisation */
194 if (sh_mv.mv_init_irq != NULL)
198 #if !defined(CONFIG_CPU_HAS_PINT_IRQ)
199 int ipr_irq_demux(int irq)
205 EXPORT_SYMBOL(make_ipr_irq);