diff options
Diffstat (limited to 'arch/ppc/syslib/cpc700_pic.c')
| -rw-r--r-- | arch/ppc/syslib/cpc700_pic.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/arch/ppc/syslib/cpc700_pic.c b/arch/ppc/syslib/cpc700_pic.c deleted file mode 100644 index d48e8f45c050..000000000000 --- a/arch/ppc/syslib/cpc700_pic.c +++ /dev/null @@ -1,181 +0,0 @@ -/* - * Interrupt controller support for IBM Spruce - * - * Authors: Mark Greer, Matt Porter, and Johnnie Peters - * mgreer@mvista.com - * mporter@mvista.com - * jpeters@mvista.com - * - * 2001-2002 (c) MontaVista, Software, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. - */ - -#include <linux/stddef.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/signal.h> -#include <linux/irq.h> - -#include <asm/io.h> -#include <asm/system.h> -#include <asm/irq.h> - -#include "cpc700.h" - -static void -cpc700_unmask_irq(unsigned int irq) -{ - unsigned int tr_bits; - - /* - * IRQ 31 is largest IRQ supported. - * IRQs 17-19 are reserved. - */ - if ((irq <= 31) && ((irq < 17) || (irq > 19))) { - tr_bits = CPC700_IN_32(CPC700_UIC_UICTR); - - if ((tr_bits & (1 << (31 - irq))) == 0) { - /* level trigger interrupt, clear bit in status - * register */ - CPC700_OUT_32(CPC700_UIC_UICSR, 1 << (31 - irq)); - } - - /* Know IRQ fits in entry 0 of ppc_cached_irq_mask[] */ - ppc_cached_irq_mask[0] |= CPC700_UIC_IRQ_BIT(irq); - - CPC700_OUT_32(CPC700_UIC_UICER, ppc_cached_irq_mask[0]); - } - return; -} - -static void -cpc700_mask_irq(unsigned int irq) -{ - /* - * IRQ 31 is largest IRQ supported. - * IRQs 17-19 are reserved. - */ - if ((irq <= 31) && ((irq < 17) || (irq > 19))) { - /* Know IRQ fits in entry 0 of ppc_cached_irq_mask[] */ - ppc_cached_irq_mask[0] &= - ~CPC700_UIC_IRQ_BIT(irq); - - CPC700_OUT_32(CPC700_UIC_UICER, ppc_cached_irq_mask[0]); - } - return; -} - -static void -cpc700_mask_and_ack_irq(unsigned int irq) -{ - u_int bit; - - /* - * IRQ 31 is largest IRQ supported. - * IRQs 17-19 are reserved. - */ - if ((irq <= 31) && ((irq < 17) || (irq > 19))) { - /* Know IRQ fits in entry 0 of ppc_cached_irq_mask[] */ - bit = CPC700_UIC_IRQ_BIT(irq); - - ppc_cached_irq_mask[0] &= ~bit; - CPC700_OUT_32(CPC700_UIC_UICER, ppc_cached_irq_mask[0]); - CPC700_OUT_32(CPC700_UIC_UICSR, bit); /* Write 1 clears IRQ */ - } - return; -} - -static struct hw_interrupt_type cpc700_pic = { - .typename = "CPC700 PIC", - .enable = cpc700_unmask_irq, - .disable = cpc700_mask_irq, - .ack = cpc700_mask_and_ack_irq, -}; - -__init static void -cpc700_pic_init_irq(unsigned int irq) -{ - unsigned int tmp; - - /* Set interrupt sense */ - tmp = CPC700_IN_32(CPC700_UIC_UICTR); - if (cpc700_irq_assigns[irq][0] == 0) { - tmp &= ~CPC700_UIC_IRQ_BIT(irq); - } else { - tmp |= CPC700_UIC_IRQ_BIT(irq); - } - CPC700_OUT_32(CPC700_UIC_UICTR, tmp); - - /* Set interrupt polarity */ - tmp = CPC700_IN_32(CPC700_UIC_UICPR); - if (cpc700_irq_assigns[irq][1]) { - tmp |= CPC700_UIC_IRQ_BIT(irq); - } else { - tmp &= ~CPC700_UIC_IRQ_BIT(irq); - } - CPC700_OUT_32(CPC700_UIC_UICPR, tmp); - - /* Set interrupt critical */ - tmp = CPC700_IN_32(CPC700_UIC_UICCR); - tmp |= CPC700_UIC_IRQ_BIT(irq); - CPC700_OUT_32(CPC700_UIC_UICCR, tmp); - - return; -} - -__init void -cpc700_init_IRQ(void) -{ - int i; - - ppc_cached_irq_mask[0] = 0; - CPC700_OUT_32(CPC700_UIC_UICER, 0x00000000); /* Disable all irq's */ - CPC700_OUT_32(CPC700_UIC_UICSR, 0xffffffff); /* Clear cur intrs */ - CPC700_OUT_32(CPC700_UIC_UICCR, 0xffffffff); /* Gen INT not MCP */ - CPC700_OUT_32(CPC700_UIC_UICPR, 0x00000000); /* Active low */ - CPC700_OUT_32(CPC700_UIC_UICTR, 0x00000000); /* Level Sensitive */ - CPC700_OUT_32(CPC700_UIC_UICVR, CPC700_UIC_UICVCR_0_HI); - /* IRQ 0 is highest */ - - for (i = 0; i < 17; i++) { - irq_desc[i].chip = &cpc700_pic; - cpc700_pic_init_irq(i); - } - - for (i = 20; i < 32; i++) { - irq_desc[i].chip = &cpc700_pic; - cpc700_pic_init_irq(i); - } - - return; -} - - - -/* - * Find the highest IRQ that generating an interrupt, if any. - */ -int -cpc700_get_irq(void) -{ - int irq = 0; - u_int irq_status, irq_test = 1; - - irq_status = CPC700_IN_32(CPC700_UIC_UICMSR); - - do - { - if (irq_status & irq_test) - break; - irq++; - irq_test <<= 1; - } while (irq < NR_IRQS); - - - if (irq == NR_IRQS) - irq = 33; - - return (31 - irq); -} |