diff options
-rw-r--r-- | arch/mips/sgi-ip22/ip22-eisa.c | 148 |
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; |