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/init.h>
19 #include <linux/irq.h>
20 #include <linux/module.h>
22 #include <asm/system.h>
24 #include <asm/machvec.h>
27 unsigned int addr; /* Address of Interrupt Priority Register */
28 int shift; /* Shifts of the 16-bit data */
29 int priority; /* The priority */
31 static struct ipr_data ipr_data[NR_IRQS];
33 static void enable_ipr_irq(unsigned int irq);
34 static void disable_ipr_irq(unsigned int irq);
36 /* shutdown is same as "disable" */
37 #define shutdown_ipr_irq disable_ipr_irq
39 static void mask_and_ack_ipr(unsigned int);
40 static void end_ipr_irq(unsigned int irq);
42 static unsigned int startup_ipr_irq(unsigned int irq)
45 return 0; /* never anything pending */
48 static struct hw_interrupt_type ipr_irq_type = {
49 .typename = "IPR-IRQ",
50 .startup = startup_ipr_irq,
51 .shutdown = shutdown_ipr_irq,
52 .enable = enable_ipr_irq,
53 .disable = disable_ipr_irq,
54 .ack = mask_and_ack_ipr,
58 static void disable_ipr_irq(unsigned int irq)
60 unsigned long val, flags;
61 unsigned int addr = ipr_data[irq].addr;
62 unsigned short mask = 0xffff ^ (0x0f << ipr_data[irq].shift);
64 /* Set the priority in IPR to 0 */
65 local_irq_save(flags);
69 local_irq_restore(flags);
72 static void enable_ipr_irq(unsigned int irq)
74 unsigned long val, flags;
75 unsigned int addr = ipr_data[irq].addr;
76 int priority = ipr_data[irq].priority;
77 unsigned short value = (priority << ipr_data[irq].shift);
79 /* Set priority in IPR back to original value */
80 local_irq_save(flags);
84 local_irq_restore(flags);
87 static void mask_and_ack_ipr(unsigned int irq)
91 #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
92 defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
93 /* This is needed when we use edge triggered setting */
94 /* XXX: Is it really needed? */
95 if (IRQ0_IRQ <= irq && irq <= IRQ5_IRQ) {
96 /* Clear external interrupt request */
97 int a = ctrl_inb(INTC_IRR0);
98 a &= ~(1 << (irq - IRQ0_IRQ));
99 ctrl_outb(a, INTC_IRR0);
104 static void end_ipr_irq(unsigned int irq)
106 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
110 void make_ipr_irq(unsigned int irq, unsigned int addr, int pos, int priority)
112 disable_irq_nosync(irq);
113 ipr_data[irq].addr = addr;
114 ipr_data[irq].shift = pos*4; /* POSition (0-3) x 4 means shift */
115 ipr_data[irq].priority = priority;
117 irq_desc[irq].chip = &ipr_irq_type;
118 disable_ipr_irq(irq);
121 void __init init_IRQ(void)
123 #ifndef CONFIG_CPU_SUBTYPE_SH7780
124 make_ipr_irq(TIMER_IRQ, TIMER_IPR_ADDR, TIMER_IPR_POS, TIMER_PRIORITY);
125 make_ipr_irq(TIMER1_IRQ, TIMER1_IPR_ADDR, TIMER1_IPR_POS, TIMER1_PRIORITY);
126 #if defined(CONFIG_SH_RTC)
127 make_ipr_irq(RTC_IRQ, RTC_IPR_ADDR, RTC_IPR_POS, RTC_PRIORITY);
131 make_ipr_irq(SCI_ERI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
132 make_ipr_irq(SCI_RXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
133 make_ipr_irq(SCI_TXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
137 make_ipr_irq(SCIF1_ERI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
138 make_ipr_irq(SCIF1_RXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
139 make_ipr_irq(SCIF1_BRI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
140 make_ipr_irq(SCIF1_TXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
143 #if defined(CONFIG_CPU_SUBTYPE_SH7300)
144 make_ipr_irq(SCIF0_IRQ, SCIF0_IPR_ADDR, SCIF0_IPR_POS, SCIF0_PRIORITY);
145 make_ipr_irq(DMTE2_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
146 make_ipr_irq(DMTE3_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
147 make_ipr_irq(VIO_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY);
151 make_ipr_irq(SCIF_ERI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
152 make_ipr_irq(SCIF_RXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
153 make_ipr_irq(SCIF_BRI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
154 make_ipr_irq(SCIF_TXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
158 make_ipr_irq(IRDA_ERI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
159 make_ipr_irq(IRDA_RXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
160 make_ipr_irq(IRDA_BRI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
161 make_ipr_irq(IRDA_TXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
164 #if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
165 defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
167 * Initialize the Interrupt Controller (INTC)
168 * registers to their power on values
172 * Enable external irq (INTC IRQ mode).
173 * You should set corresponding bits of PFC to "00"
174 * to enable these interrupts.
176 make_ipr_irq(IRQ0_IRQ, IRQ0_IPR_ADDR, IRQ0_IPR_POS, IRQ0_PRIORITY);
177 make_ipr_irq(IRQ1_IRQ, IRQ1_IPR_ADDR, IRQ1_IPR_POS, IRQ1_PRIORITY);
178 make_ipr_irq(IRQ2_IRQ, IRQ2_IPR_ADDR, IRQ2_IPR_POS, IRQ2_PRIORITY);
179 make_ipr_irq(IRQ3_IRQ, IRQ3_IPR_ADDR, IRQ3_IPR_POS, IRQ3_PRIORITY);
180 make_ipr_irq(IRQ4_IRQ, IRQ4_IPR_ADDR, IRQ4_IPR_POS, IRQ4_PRIORITY);
181 make_ipr_irq(IRQ5_IRQ, IRQ5_IPR_ADDR, IRQ5_IPR_POS, IRQ5_PRIORITY);
185 #ifdef CONFIG_CPU_HAS_PINT_IRQ
189 #ifdef CONFIG_CPU_HAS_INTC2_IRQ
192 /* Perform the machine specific initialisation */
193 if (sh_mv.mv_init_irq != NULL)
197 #if !defined(CONFIG_CPU_HAS_PINT_IRQ)
198 int ipr_irq_demux(int irq)
204 EXPORT_SYMBOL(make_ipr_irq);