diff options
Diffstat (limited to 'arch/mips/sgi-ip22/ip22-eisa.c')
| -rw-r--r-- | arch/mips/sgi-ip22/ip22-eisa.c | 162 |
1 files changed, 15 insertions, 147 deletions
diff --git a/arch/mips/sgi-ip22/ip22-eisa.c b/arch/mips/sgi-ip22/ip22-eisa.c index 6b6e97b90c6..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. @@ -36,26 +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; @@ -72,12 +73,10 @@ static char __init *decode_eisa_sig(unsigned long addr) 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); @@ -93,126 +92,11 @@ static irqreturn_t ip22_eisa_intr(int irq, void *dev_id) return IRQ_NONE; } -static void enable_eisa1_irq(unsigned int irq) -{ - u8 mask; - - mask = inb(EISA_INT1_MASK); - mask &= ~((u8) (1 << irq)); - outb(mask, EISA_INT1_MASK); -} - -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); -} - -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 irq_chip ip22_eisa1_irq_type = { - .name = "IP22 EISA", - .startup = startup_eisa1_irq, - .ack = mask_and_ack_eisa1_irq, - .mask = disable_eisa1_irq, - .mask_ack = mask_and_ack_eisa1_irq, - .unmask = enable_eisa1_irq, - .end = end_eisa1_irq, -}; - -static void enable_eisa2_irq(unsigned int irq) -{ - u8 mask; - - mask = inb(EISA_INT2_MASK); - mask &= ~((u8) (1 << (irq - 8))); - outb(mask, EISA_INT2_MASK); -} - -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); -} - -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); -} - -static struct irq_chip ip22_eisa2_irq_type = { - .name = "IP22 EISA", - .startup = startup_eisa2_irq, - .ack = mask_and_ack_eisa2_irq, - .mask = disable_eisa2_irq, - .mask_ack = mask_and_ack_eisa2_irq, - .unmask = enable_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; @@ -248,29 +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++) { - if (i < (SGINT_EISA + 8)) - set_irq_chip(i, &ip22_eisa1_irq_type); - else - set_irq_chip(i, &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; |