2 * Interrupt handling for INTC2-based IRQ.
4 * Copyright (C) 2001 David J. Mckay (david.mckay@st.com)
5 * Copyright (C) 2005, 2006 Paul Mundt (lethal@linux-sh.org)
7 * May be copied or modified under the terms of the GNU General Public
8 * License. See linux/COPYING for more information.
10 * These are the "new Hitachi style" interrupts, as present on the
11 * Hitachi 7751, the STM ST40 STB1, SH7760, and SH7780.
13 #include <linux/kernel.h>
14 #include <linux/interrupt.h>
17 #if defined(CONFIG_CPU_SUBTYPE_SH7760)
18 #define INTC2_BASE 0xfe080000
19 #define INTC2_INTMSK (INTC2_BASE + 0x40)
20 #define INTC2_INTMSKCLR (INTC2_BASE + 0x60)
21 #elif defined(CONFIG_CPU_SUBTYPE_SH7780) || \
22 defined(CONFIG_CPU_SUBTYPE_SH7785)
23 #define INTC2_BASE 0xffd40000
24 #define INTC2_INTMSK (INTC2_BASE + 0x38)
25 #define INTC2_INTMSKCLR (INTC2_BASE + 0x3c)
28 static void disable_intc2_irq(unsigned int irq)
30 struct intc2_data *p = get_irq_chip_data(irq);
31 ctrl_outl(1 << p->msk_shift, INTC2_INTMSK + p->msk_offset);
34 static void enable_intc2_irq(unsigned int irq)
36 struct intc2_data *p = get_irq_chip_data(irq);
37 ctrl_outl(1 << p->msk_shift, INTC2_INTMSKCLR + p->msk_offset);
40 static struct irq_chip intc2_irq_chip = {
42 .mask = disable_intc2_irq,
43 .unmask = enable_intc2_irq,
44 .mask_ack = disable_intc2_irq,
48 * Setup an INTC2 style interrupt.
49 * NOTE: Unlike IPR interrupts, parameters are not shifted by this code,
50 * allowing the use of the numbers straight out of the datasheet.
52 * PIO1 which is INTPRI00[19,16] and INTMSK00[13]
55 * { 84, 0, 16, 0, 13 },
57 * in the intc2_data table.
59 void make_intc2_irq(struct intc2_data *table, unsigned int nr_irqs)
63 for (i = 0; i < nr_irqs; i++) {
64 unsigned long ipr, flags;
65 struct intc2_data *p = table + i;
67 disable_irq_nosync(p->irq);
69 /* Set the priority level */
70 local_irq_save(flags);
72 ipr = ctrl_inl(INTC2_BASE + p->ipr_offset);
73 ipr &= ~(0xf << p->ipr_shift);
74 ipr |= p->priority << p->ipr_shift;
75 ctrl_outl(ipr, INTC2_BASE + p->ipr_offset);
77 local_irq_restore(flags);
79 set_irq_chip_and_handler_name(p->irq, &intc2_irq_chip,
80 handle_level_irq, "level");
81 set_irq_chip_data(p->irq, p);
83 enable_intc2_irq(p->irq);