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Diffstat (limited to 'arch/mips/sgi-ip22/ip22-eisa.c')
-rw-r--r--arch/mips/sgi-ip22/ip22-eisa.c148
1 files changed, 67 insertions, 81 deletions
diff --git a/arch/mips/sgi-ip22/ip22-eisa.c b/arch/mips/sgi-ip22/ip22-eisa.c
index fa0e719c5bd1..b19820110aa3 100644
--- a/arch/mips/sgi-ip22/ip22-eisa.c
+++ b/arch/mips/sgi-ip22/ip22-eisa.c
@@ -29,6 +29,7 @@
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
+#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
@@ -37,42 +38,29 @@
#include <asm/sgi/mc.h>
#include <asm/sgi/ip22.h>
-#define EISA_MAX_SLOTS 4
+/* I2 has four EISA slots. */
+#define IP22_EISA_MAX_SLOTS 4
#define EISA_MAX_IRQ 16
-#define EISA_TO_PHYS(x) (0x00080000 | (x))
-#define EISA_TO_KSEG1(x) ((void *) KSEG1ADDR(EISA_TO_PHYS((x))))
-
-#define EIU_MODE_REG 0x0009ffc0
-#define EIU_STAT_REG 0x0009ffc4
-#define EIU_PREMPT_REG 0x0009ffc8
-#define EIU_QUIET_REG 0x0009ffcc
-#define EIU_INTRPT_ACK 0x00090004
-
-#define EISA_DMA1_STATUS 8
-#define EISA_INT1_CTRL 0x20
-#define EISA_INT1_MASK 0x21
-#define EISA_INT2_CTRL 0xA0
-#define EISA_INT2_MASK 0xA1
-#define EISA_DMA2_STATUS 0xD0
-#define EISA_DMA2_WRITE_SINGLE 0xD4
-#define EISA_EXT_NMI_RESET_CTRL 0x461
-#define EISA_INT1_EDGE_LEVEL 0x4D0
-#define EISA_INT2_EDGE_LEVEL 0x4D1
-#define EISA_VENDOR_ID_OFFSET 0xC80
-
-#define EIU_WRITE_32(x,y) { *((u32 *) KSEG1ADDR(x)) = (u32) (y); mb(); }
-#define EIU_READ_8(x) *((u8 *) KSEG1ADDR(x))
-#define EISA_WRITE_8(x,y) { *((u8 *) EISA_TO_KSEG1(x)) = (u8) (y); mb(); }
-#define EISA_READ_8(x) *((u8 *) EISA_TO_KSEG1(x))
-
-static char *decode_eisa_sig(u8 * sig)
+#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[8];
- u16 rev;
+ static char sig_str[EISA_SIG_LEN];
+ u8 sig[4];
+ u16 rev;
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ sig[i] = inb (addr + i);
- if (sig[0] & 0x80)
- return NULL;
+ if (!i && (sig[0] & 0x80))
+ return NULL;
+ }
sig_str[0] = ((sig[0] >> 2) & 0x1f) + ('A' - 1);
sig_str[1] = (((sig[0] & 3) << 3) | (sig[1] >> 5)) + ('A' - 1);
@@ -83,23 +71,26 @@ static char *decode_eisa_sig(u8 * sig)
return sig_str;
}
-static void ip22_eisa_intr(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t ip22_eisa_intr(int irq, void *dev_id, struct pt_regs *regs)
{
u8 eisa_irq;
u8 dma1, dma2;
- eisa_irq = EIU_READ_8(EIU_INTRPT_ACK);
- dma1 = EISA_READ_8(EISA_DMA1_STATUS);
- dma2 = EISA_READ_8(EISA_DMA2_STATUS);
-
- if (eisa_irq >= EISA_MAX_IRQ) {
- /* Oops, Bad Stuff Happened... */
- printk(KERN_ERR "eisa_irq %d out of bound\n", eisa_irq);
+ eisa_irq = inb(EIU_INTRPT_ACK);
+ dma1 = inb(EISA_DMA1_STATUS);
+ dma2 = inb(EISA_DMA2_STATUS);
- EISA_WRITE_8(EISA_INT2_CTRL, 0x20);
- EISA_WRITE_8(EISA_INT1_CTRL, 0x20);
- } else
+ if (eisa_irq < EISA_MAX_IRQ) {
do_IRQ(eisa_irq, regs);
+ return IRQ_HANDLED;
+ }
+
+ /* Oops, Bad Stuff Happened... */
+ printk(KERN_ERR "eisa_irq %d out of bound\n", eisa_irq);
+
+ outb(0x20, EISA_INT2_CTRL);
+ outb(0x20, EISA_INT1_CTRL);
+ return IRQ_NONE;
}
static void enable_eisa1_irq(unsigned int irq)
@@ -109,9 +100,9 @@ static void enable_eisa1_irq(unsigned int irq)
local_irq_save(flags);
- mask = EISA_READ_8(EISA_INT1_MASK);
+ mask = inb(EISA_INT1_MASK);
mask &= ~((u8) (1 << irq));
- EISA_WRITE_8(EISA_INT1_MASK, mask);
+ outb(mask, EISA_INT1_MASK);
local_irq_restore(flags);
}
@@ -122,9 +113,9 @@ static unsigned int startup_eisa1_irq(unsigned int irq)
/* Only use edge interrupts for EISA */
- edge = EISA_READ_8(EISA_INT1_EDGE_LEVEL);
+ edge = inb(EISA_INT1_EDGE_LEVEL);
edge &= ~((u8) (1 << irq));
- EISA_WRITE_8(EISA_INT1_EDGE_LEVEL, edge);
+ outb(edge, EISA_INT1_EDGE_LEVEL);
enable_eisa1_irq(irq);
return 0;
@@ -134,9 +125,9 @@ static void disable_eisa1_irq(unsigned int irq)
{
u8 mask;
- mask = EISA_READ_8(EISA_INT1_MASK);
+ mask = inb(EISA_INT1_MASK);
mask |= ((u8) (1 << irq));
- EISA_WRITE_8(EISA_INT1_MASK, mask);
+ outb(mask, EISA_INT1_MASK);
}
#define shutdown_eisa1_irq disable_eisa1_irq
@@ -145,7 +136,7 @@ static void mask_and_ack_eisa1_irq(unsigned int irq)
{
disable_eisa1_irq(irq);
- EISA_WRITE_8(EISA_INT1_CTRL, 0x20);
+ outb(0x20, EISA_INT1_CTRL);
}
static void end_eisa1_irq(unsigned int irq)
@@ -171,9 +162,9 @@ static void enable_eisa2_irq(unsigned int irq)
local_irq_save(flags);
- mask = EISA_READ_8(EISA_INT2_MASK);
+ mask = inb(EISA_INT2_MASK);
mask &= ~((u8) (1 << (irq - 8)));
- EISA_WRITE_8(EISA_INT2_MASK, mask);
+ outb(mask, EISA_INT2_MASK);
local_irq_restore(flags);
}
@@ -184,9 +175,9 @@ static unsigned int startup_eisa2_irq(unsigned int irq)
/* Only use edge interrupts for EISA */
- edge = EISA_READ_8(EISA_INT2_EDGE_LEVEL);
+ edge = inb(EISA_INT2_EDGE_LEVEL);
edge &= ~((u8) (1 << (irq - 8)));
- EISA_WRITE_8(EISA_INT2_EDGE_LEVEL, edge);
+ outb(edge, EISA_INT2_EDGE_LEVEL);
enable_eisa2_irq(irq);
return 0;
@@ -196,9 +187,9 @@ static void disable_eisa2_irq(unsigned int irq)
{
u8 mask;
- mask = EISA_READ_8(EISA_INT2_MASK);
+ mask = inb(EISA_INT2_MASK);
mask |= ((u8) (1 << (irq - 8)));
- EISA_WRITE_8(EISA_INT2_MASK, mask);
+ outb(mask, EISA_INT2_MASK);
}
#define shutdown_eisa2_irq disable_eisa2_irq
@@ -207,8 +198,7 @@ static void mask_and_ack_eisa2_irq(unsigned int irq)
{
disable_eisa2_irq(irq);
- EISA_WRITE_8(EISA_INT2_CTRL, 0x20);
- EISA_WRITE_8(EISA_INT1_CTRL, 0x20);
+ outb(0x20, EISA_INT2_CTRL);
}
static void end_eisa2_irq(unsigned int irq)
@@ -241,7 +231,6 @@ int __init ip22_eisa_init(void)
{
int i, c;
char *str;
- u8 *slot_addr;
if (!(sgimc->systemid & SGIMC_SYSID_EPRESENT)) {
printk(KERN_INFO "EISA: bus not present.\n");
@@ -249,11 +238,8 @@ int __init ip22_eisa_init(void)
}
printk(KERN_INFO "EISA: Probing bus...\n");
- for (c = 0, i = 1; i <= EISA_MAX_SLOTS; i++) {
- slot_addr =
- (u8 *) EISA_TO_KSEG1((0x1000 * i) +
- EISA_VENDOR_ID_OFFSET);
- if ((str = decode_eisa_sig(slot_addr))) {
+ for (c = 0, i = 1; i <= IP22_EISA_MAX_SLOTS; i++) {
+ if ((str = decode_eisa_sig(0x1000 * i + EISA_VENDOR_ID_OFFSET))) {
printk(KERN_INFO "EISA: slot %d : %s detected.\n",
i, str);
c++;
@@ -268,25 +254,25 @@ int __init ip22_eisa_init(void)
Please wave your favorite dead chicken over the busses */
/* First say hello to the EIU */
- EIU_WRITE_32(EIU_PREMPT_REG, 0x0000FFFF);
- EIU_WRITE_32(EIU_QUIET_REG, 1);
- EIU_WRITE_32(EIU_MODE_REG, 0x40f3c07F);
+ outl(0x0000FFFF, EIU_PREMPT_REG);
+ outl(1, EIU_QUIET_REG);
+ outl(0x40f3c07F, EIU_MODE_REG);
/* Now be nice to the EISA chipset */
- EISA_WRITE_8(EISA_EXT_NMI_RESET_CTRL, 1);
- for (i = 0; i < 10000; i++); /* Wait long enough for the dust to settle */
- EISA_WRITE_8(EISA_EXT_NMI_RESET_CTRL, 0);
- EISA_WRITE_8(EISA_INT1_CTRL, 0x11);
- EISA_WRITE_8(EISA_INT2_CTRL, 0x11);
- EISA_WRITE_8(EISA_INT1_MASK, 0);
- EISA_WRITE_8(EISA_INT2_MASK, 8);
- EISA_WRITE_8(EISA_INT1_MASK, 4);
- EISA_WRITE_8(EISA_INT2_MASK, 2);
- EISA_WRITE_8(EISA_INT1_MASK, 1);
- EISA_WRITE_8(EISA_INT2_MASK, 1);
- EISA_WRITE_8(EISA_INT1_MASK, 0xfb);
- EISA_WRITE_8(EISA_INT2_MASK, 0xff);
- EISA_WRITE_8(EISA_DMA2_WRITE_SINGLE, 0);
+ 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;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.