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Diffstat (limited to 'arch/sh/kernel/cpu/irq/ipr.c')
-rw-r--r--arch/sh/kernel/cpu/irq/ipr.c231
1 files changed, 54 insertions, 177 deletions
diff --git a/arch/sh/kernel/cpu/irq/ipr.c b/arch/sh/kernel/cpu/irq/ipr.c
index fdbd718ae5c..5de6dff5c21 100644
--- a/arch/sh/kernel/cpu/irq/ipr.c
+++ b/arch/sh/kernel/cpu/irq/ipr.c
@@ -1,206 +1,83 @@
/*
- * arch/sh/kernel/cpu/irq/ipr.c
+ * Interrupt handling for IPR-based IRQ.
*
* Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi
* Copyright (C) 2000 Kazumoto Kojima
- * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
- *
- * Interrupt handling for IPR-based IRQ.
+ * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
+ * Copyright (C) 2006 Paul Mundt
*
* Supported system:
* On-chip supporting modules (TMU, RTC, etc.).
- * On-chip supporting modules for SH7709/SH7709A/SH7729/SH7300.
+ * On-chip supporting modules for SH7709/SH7709A/SH7729.
* Hitachi SolutionEngine external I/O:
* MS7709SE01, MS7709ASE01, and MS7750SE01
*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
*/
-
-#include <linux/config.h>
#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
#include <linux/irq.h>
+#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/topology.h>
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/machvec.h>
-
-struct ipr_data {
- unsigned int addr; /* Address of Interrupt Priority Register */
- int shift; /* Shifts of the 16-bit data */
- int priority; /* The priority */
-};
-static struct ipr_data ipr_data[NR_IRQS];
-
-static void enable_ipr_irq(unsigned int irq);
-static void disable_ipr_irq(unsigned int irq);
-
-/* shutdown is same as "disable" */
-#define shutdown_ipr_irq disable_ipr_irq
-
-static void mask_and_ack_ipr(unsigned int);
-static void end_ipr_irq(unsigned int irq);
-
-static unsigned int startup_ipr_irq(unsigned int irq)
+static inline struct ipr_desc *get_ipr_desc(struct irq_data *data)
{
- enable_ipr_irq(irq);
- return 0; /* never anything pending */
+ struct irq_chip *chip = irq_data_get_irq_chip(data);
+ return container_of(chip, struct ipr_desc, chip);
}
-static struct hw_interrupt_type ipr_irq_type = {
- .typename = "IPR-IRQ",
- .startup = startup_ipr_irq,
- .shutdown = shutdown_ipr_irq,
- .enable = enable_ipr_irq,
- .disable = disable_ipr_irq,
- .ack = mask_and_ack_ipr,
- .end = end_ipr_irq
-};
-
-static void disable_ipr_irq(unsigned int irq)
+static void disable_ipr_irq(struct irq_data *data)
{
- unsigned long val, flags;
- unsigned int addr = ipr_data[irq].addr;
- unsigned short mask = 0xffff ^ (0x0f << ipr_data[irq].shift);
-
+ struct ipr_data *p = irq_data_get_irq_chip_data(data);
+ unsigned long addr = get_ipr_desc(data)->ipr_offsets[p->ipr_idx];
/* Set the priority in IPR to 0 */
- local_irq_save(flags);
- val = ctrl_inw(addr);
- val &= mask;
- ctrl_outw(val, addr);
- local_irq_restore(flags);
+ __raw_writew(__raw_readw(addr) & (0xffff ^ (0xf << p->shift)), addr);
+ (void)__raw_readw(addr); /* Read back to flush write posting */
}
-static void enable_ipr_irq(unsigned int irq)
+static void enable_ipr_irq(struct irq_data *data)
{
- unsigned long val, flags;
- unsigned int addr = ipr_data[irq].addr;
- int priority = ipr_data[irq].priority;
- unsigned short value = (priority << ipr_data[irq].shift);
-
+ struct ipr_data *p = irq_data_get_irq_chip_data(data);
+ unsigned long addr = get_ipr_desc(data)->ipr_offsets[p->ipr_idx];
/* Set priority in IPR back to original value */
- local_irq_save(flags);
- val = ctrl_inw(addr);
- val |= value;
- ctrl_outw(val, addr);
- local_irq_restore(flags);
+ __raw_writew(__raw_readw(addr) | (p->priority << p->shift), addr);
}
-static void mask_and_ack_ipr(unsigned int irq)
+/*
+ * The shift value is now the number of bits to shift, not the number of
+ * bits/4. This is to make it easier to read the value directly from the
+ * datasheets. The IPR address is calculated using the ipr_offset table.
+ */
+void register_ipr_controller(struct ipr_desc *desc)
{
- disable_ipr_irq(irq);
-
-#if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
- defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
- /* This is needed when we use edge triggered setting */
- /* XXX: Is it really needed? */
- if (IRQ0_IRQ <= irq && irq <= IRQ5_IRQ) {
- /* Clear external interrupt request */
- int a = ctrl_inb(INTC_IRR0);
- a &= ~(1 << (irq - IRQ0_IRQ));
- ctrl_outb(a, INTC_IRR0);
+ int i;
+
+ desc->chip.irq_mask = disable_ipr_irq;
+ desc->chip.irq_unmask = enable_ipr_irq;
+
+ for (i = 0; i < desc->nr_irqs; i++) {
+ struct ipr_data *p = desc->ipr_data + i;
+ int res;
+
+ BUG_ON(p->ipr_idx >= desc->nr_offsets);
+ BUG_ON(!desc->ipr_offsets[p->ipr_idx]);
+
+ res = irq_alloc_desc_at(p->irq, numa_node_id());
+ if (unlikely(res != p->irq && res != -EEXIST)) {
+ printk(KERN_INFO "can not get irq_desc for %d\n",
+ p->irq);
+ continue;
+ }
+
+ disable_irq_nosync(p->irq);
+ irq_set_chip_and_handler_name(p->irq, &desc->chip,
+ handle_level_irq, "level");
+ irq_set_chip_data(p->irq, p);
+ disable_ipr_irq(irq_get_irq_data(p->irq));
}
-#endif
-}
-
-static void end_ipr_irq(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
- enable_ipr_irq(irq);
-}
-
-void make_ipr_irq(unsigned int irq, unsigned int addr, int pos,
- int priority, int maskpos)
-{
- disable_irq_nosync(irq);
- ipr_data[irq].addr = addr;
- ipr_data[irq].shift = pos*4; /* POSition (0-3) x 4 means shift */
- ipr_data[irq].priority = priority;
-
- irq_desc[irq].handler = &ipr_irq_type;
- disable_ipr_irq(irq);
}
-
-void __init init_IRQ(void)
-{
-#ifndef CONFIG_CPU_SUBTYPE_SH7780
- make_ipr_irq(TIMER_IRQ, TIMER_IPR_ADDR, TIMER_IPR_POS, TIMER_PRIORITY, 0);
- make_ipr_irq(TIMER1_IRQ, TIMER1_IPR_ADDR, TIMER1_IPR_POS, TIMER1_PRIORITY, 0);
-#if defined(CONFIG_SH_RTC)
- make_ipr_irq(RTC_IRQ, RTC_IPR_ADDR, RTC_IPR_POS, RTC_PRIORITY, 0);
-#endif
-
-#ifdef SCI_ERI_IRQ
- make_ipr_irq(SCI_ERI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY, 0);
- make_ipr_irq(SCI_RXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY, 0);
- make_ipr_irq(SCI_TXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY, 0);
-#endif
-
-#ifdef SCIF1_ERI_IRQ
- make_ipr_irq(SCIF1_ERI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY, 0);
- make_ipr_irq(SCIF1_RXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY, 0);
- make_ipr_irq(SCIF1_BRI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY, 0);
- make_ipr_irq(SCIF1_TXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY, 0);
-#endif
-
-#if defined(CONFIG_CPU_SUBTYPE_SH7300)
- make_ipr_irq(SCIF0_IRQ, SCIF0_IPR_ADDR, SCIF0_IPR_POS, SCIF0_PRIORITY, 0);
- make_ipr_irq(DMTE2_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY, 0);
- make_ipr_irq(DMTE3_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY, 0);
- make_ipr_irq(VIO_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY, 0);
-#endif
-
-#ifdef SCIF_ERI_IRQ
- make_ipr_irq(SCIF_ERI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY, 0);
- make_ipr_irq(SCIF_RXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY, 0);
- make_ipr_irq(SCIF_BRI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY, 0);
- make_ipr_irq(SCIF_TXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY, 0);
-#endif
-
-#ifdef IRDA_ERI_IRQ
- make_ipr_irq(IRDA_ERI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY, 0);
- make_ipr_irq(IRDA_RXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY, 0);
- make_ipr_irq(IRDA_BRI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY, 0);
- make_ipr_irq(IRDA_TXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY, 0);
-#endif
-
-#if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
- defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
- /*
- * Initialize the Interrupt Controller (INTC)
- * registers to their power on values
- */
-
- /*
- * Enable external irq (INTC IRQ mode).
- * You should set corresponding bits of PFC to "00"
- * to enable these interrupts.
- */
- make_ipr_irq(IRQ0_IRQ, IRQ0_IPR_ADDR, IRQ0_IPR_POS, IRQ0_PRIORITY, 0);
- make_ipr_irq(IRQ1_IRQ, IRQ1_IPR_ADDR, IRQ1_IPR_POS, IRQ1_PRIORITY, 0);
- make_ipr_irq(IRQ2_IRQ, IRQ2_IPR_ADDR, IRQ2_IPR_POS, IRQ2_PRIORITY, 0);
- make_ipr_irq(IRQ3_IRQ, IRQ3_IPR_ADDR, IRQ3_IPR_POS, IRQ3_PRIORITY, 0);
- make_ipr_irq(IRQ4_IRQ, IRQ4_IPR_ADDR, IRQ4_IPR_POS, IRQ4_PRIORITY, 0);
- make_ipr_irq(IRQ5_IRQ, IRQ5_IPR_ADDR, IRQ5_IPR_POS, IRQ5_PRIORITY, 0);
-#endif
-#endif
-
-#ifdef CONFIG_CPU_HAS_PINT_IRQ
- init_IRQ_pint();
-#endif
-
-#ifdef CONFIG_CPU_HAS_INTC2_IRQ
- init_IRQ_intc2();
-#endif
- /* Perform the machine specific initialisation */
- if (sh_mv.mv_init_irq != NULL)
- sh_mv.mv_init_irq();
-}
-
-#if !defined(CONFIG_CPU_HAS_PINT_IRQ)
-int ipr_irq_demux(int irq)
-{
- return irq;
-}
-#endif
-
-EXPORT_SYMBOL(make_ipr_irq);
+EXPORT_SYMBOL(register_ipr_controller);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 20:31:57 +0000