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Diffstat (limited to 'arch/mips/sgi-ip22/ip22-eisa.c')
-rw-r--r--arch/mips/sgi-ip22/ip22-eisa.c185
1 files changed, 18 insertions, 167 deletions
diff --git a/arch/mips/sgi-ip22/ip22-eisa.c b/arch/mips/sgi-ip22/ip22-eisa.c
index b19820110aa..a0a79222ce0 100644
--- a/arch/mips/sgi-ip22/ip22-eisa.c
+++ b/arch/mips/sgi-ip22/ip22-eisa.c
@@ -2,7 +2,7 @@
* Basic EISA bus support for the SGI Indigo-2.
*
* (C) 2002 Pascal Dameme <netinet@freesurf.fr>
- * and Marc Zyngier <mzyngier@freesurf.fr>
+ * and Marc Zyngier <mzyngier@freesurf.fr>
*
* This code is released under both the GPL version 2 and BSD
* licenses. Either license may be used.
@@ -19,7 +19,6 @@
* - Fix more bugs.
*/
-#include <linux/config.h>
#include <linux/eisa.h>
#include <linux/types.h>
#include <linux/init.h>
@@ -37,26 +36,27 @@
#include <asm/sgi/ioc.h>
#include <asm/sgi/mc.h>
#include <asm/sgi/ip22.h>
+#include <asm/i8259.h>
/* I2 has four EISA slots. */
#define IP22_EISA_MAX_SLOTS 4
-#define EISA_MAX_IRQ 16
+#define EISA_MAX_IRQ 16
-#define EIU_MODE_REG 0x0001ffc0
-#define EIU_STAT_REG 0x0001ffc4
-#define EIU_PREMPT_REG 0x0001ffc8
-#define EIU_QUIET_REG 0x0001ffcc
-#define EIU_INTRPT_ACK 0x00010004
+#define EIU_MODE_REG 0x0001ffc0
+#define EIU_STAT_REG 0x0001ffc4
+#define EIU_PREMPT_REG 0x0001ffc8
+#define EIU_QUIET_REG 0x0001ffcc
+#define EIU_INTRPT_ACK 0x00010004
static char __init *decode_eisa_sig(unsigned long addr)
{
- static char sig_str[EISA_SIG_LEN];
+ static char sig_str[EISA_SIG_LEN] __initdata;
u8 sig[4];
- u16 rev;
+ u16 rev;
int i;
for (i = 0; i < 4; i++) {
- sig[i] = inb (addr + i);
+ sig[i] = inb(addr + i);
if (!i && (sig[0] & 0x80))
return NULL;
@@ -71,17 +71,15 @@ static char __init *decode_eisa_sig(unsigned long addr)
return sig_str;
}
-static irqreturn_t ip22_eisa_intr(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t ip22_eisa_intr(int irq, void *dev_id)
{
- u8 eisa_irq;
- u8 dma1, dma2;
+ u8 eisa_irq = inb(EIU_INTRPT_ACK);
- eisa_irq = inb(EIU_INTRPT_ACK);
- dma1 = inb(EISA_DMA1_STATUS);
- dma2 = inb(EISA_DMA2_STATUS);
+ inb(EISA_DMA1_STATUS);
+ inb(EISA_DMA2_STATUS);
if (eisa_irq < EISA_MAX_IRQ) {
- do_IRQ(eisa_irq, regs);
+ do_IRQ(eisa_irq);
return IRQ_HANDLED;
}
@@ -90,143 +88,15 @@ static irqreturn_t ip22_eisa_intr(int irq, void *dev_id, struct pt_regs *regs)
outb(0x20, EISA_INT2_CTRL);
outb(0x20, EISA_INT1_CTRL);
- return IRQ_NONE;
-}
-
-static void enable_eisa1_irq(unsigned int irq)
-{
- unsigned long flags;
- u8 mask;
-
- local_irq_save(flags);
-
- mask = inb(EISA_INT1_MASK);
- mask &= ~((u8) (1 << irq));
- outb(mask, EISA_INT1_MASK);
-
- local_irq_restore(flags);
-}
-
-static unsigned int startup_eisa1_irq(unsigned int irq)
-{
- u8 edge;
-
- /* Only use edge interrupts for EISA */
-
- edge = inb(EISA_INT1_EDGE_LEVEL);
- edge &= ~((u8) (1 << irq));
- outb(edge, EISA_INT1_EDGE_LEVEL);
-
- enable_eisa1_irq(irq);
- return 0;
-}
-
-static void disable_eisa1_irq(unsigned int irq)
-{
- u8 mask;
-
- mask = inb(EISA_INT1_MASK);
- mask |= ((u8) (1 << irq));
- outb(mask, EISA_INT1_MASK);
-}
-
-#define shutdown_eisa1_irq disable_eisa1_irq
-
-static void mask_and_ack_eisa1_irq(unsigned int irq)
-{
- disable_eisa1_irq(irq);
-
- outb(0x20, EISA_INT1_CTRL);
-}
-
-static void end_eisa1_irq(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- enable_eisa1_irq(irq);
-}
-
-static struct hw_interrupt_type ip22_eisa1_irq_type = {
- .typename = "IP22 EISA",
- .startup = startup_eisa1_irq,
- .shutdown = shutdown_eisa1_irq,
- .enable = enable_eisa1_irq,
- .disable = disable_eisa1_irq,
- .ack = mask_and_ack_eisa1_irq,
- .end = end_eisa1_irq,
-};
-static void enable_eisa2_irq(unsigned int irq)
-{
- unsigned long flags;
- u8 mask;
-
- local_irq_save(flags);
-
- mask = inb(EISA_INT2_MASK);
- mask &= ~((u8) (1 << (irq - 8)));
- outb(mask, EISA_INT2_MASK);
-
- local_irq_restore(flags);
-}
-
-static unsigned int startup_eisa2_irq(unsigned int irq)
-{
- u8 edge;
-
- /* Only use edge interrupts for EISA */
-
- edge = inb(EISA_INT2_EDGE_LEVEL);
- edge &= ~((u8) (1 << (irq - 8)));
- outb(edge, EISA_INT2_EDGE_LEVEL);
-
- enable_eisa2_irq(irq);
- return 0;
-}
-
-static void disable_eisa2_irq(unsigned int irq)
-{
- u8 mask;
-
- mask = inb(EISA_INT2_MASK);
- mask |= ((u8) (1 << (irq - 8)));
- outb(mask, EISA_INT2_MASK);
-}
-
-#define shutdown_eisa2_irq disable_eisa2_irq
-
-static void mask_and_ack_eisa2_irq(unsigned int irq)
-{
- disable_eisa2_irq(irq);
-
- outb(0x20, EISA_INT2_CTRL);
-}
-
-static void end_eisa2_irq(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- enable_eisa2_irq(irq);
+ return IRQ_NONE;
}
-static struct hw_interrupt_type ip22_eisa2_irq_type = {
- .typename = "IP22 EISA",
- .startup = startup_eisa2_irq,
- .shutdown = shutdown_eisa2_irq,
- .enable = enable_eisa2_irq,
- .disable = disable_eisa2_irq,
- .ack = mask_and_ack_eisa2_irq,
- .end = end_eisa2_irq,
-};
-
static struct irqaction eisa_action = {
.handler = ip22_eisa_intr,
.name = "EISA",
};
-static struct irqaction cascade_action = {
- .handler = no_action,
- .name = "EISA cascade",
-};
-
int __init ip22_eisa_init(void)
{
int i, c;
@@ -262,32 +132,13 @@ int __init ip22_eisa_init(void)
outb(1, EISA_EXT_NMI_RESET_CTRL);
udelay(50); /* Wait long enough for the dust to settle */
outb(0, EISA_EXT_NMI_RESET_CTRL);
- outb(0x11, EISA_INT1_CTRL);
- outb(0x11, EISA_INT2_CTRL);
- outb(0, EISA_INT1_MASK);
- outb(8, EISA_INT2_MASK);
- outb(4, EISA_INT1_MASK);
- outb(2, EISA_INT2_MASK);
- outb(1, EISA_INT1_MASK);
- outb(1, EISA_INT2_MASK);
- outb(0xfb, EISA_INT1_MASK);
- outb(0xff, EISA_INT2_MASK);
outb(0, EISA_DMA2_WRITE_SINGLE);
- for (i = SGINT_EISA; i < (SGINT_EISA + EISA_MAX_IRQ); i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = 0;
- irq_desc[i].depth = 1;
- if (i < (SGINT_EISA + 8))
- irq_desc[i].handler = &ip22_eisa1_irq_type;
- else
- irq_desc[i].handler = &ip22_eisa2_irq_type;
- }
+ init_i8259_irqs();
/* Cannot use request_irq because of kmalloc not being ready at such
* an early stage. Yes, I've been bitten... */
setup_irq(SGI_EISA_IRQ, &eisa_action);
- setup_irq(SGINT_EISA + 2, &cascade_action);
EISA_bus = 1;
return 0;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-15 14:02:35 +0000