Skip to content

Commit

Permalink
IP22 EISA support update.
Browse files Browse the repository at this point in the history 
Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
  • Loading branch information
Thiemo Seufer authored and Ralf Baechle committed Oct 29, 2005
1 parent 7623deb commit 37c8c64
Showing 1 changed file with 67 additions and 81 deletions.
148 changes: 67 additions & 81 deletions arch/mips/sgi-ip22/ip22-eisa.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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>
Expand All @@ -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);
Expand All @@ -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)
Expand All @@ -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);
}
Expand All @@ -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;
Expand All @@ -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
Expand All @@ -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)
Expand All @@ -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);
}
Expand All @@ -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;
Expand All @@ -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
Expand All @@ -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)
Expand Down Expand Up @@ -241,19 +231,15 @@ 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");
return 1;
}

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++;
Expand All @@ -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;
Expand Down

0 comments on commit 37c8c64

Please sign in to comment.