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Diffstat (limited to 'arch/ppc/syslib/ppc4xx_pic.c')
-rw-r--r--arch/ppc/syslib/ppc4xx_pic.c284
1 files changed, 0 insertions, 284 deletions
diff --git a/arch/ppc/syslib/ppc4xx_pic.c b/arch/ppc/syslib/ppc4xx_pic.c
deleted file mode 100644
index ee0da4b4b99..00000000000
--- a/arch/ppc/syslib/ppc4xx_pic.c
+++ /dev/null
@@ -1,284 +0,0 @@
-/*
- * Interrupt controller driver for PowerPC 4xx-based processors.
- *
- * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
- * Copyright (c) 2004, 2005 Zultys Technologies
- *
- * Based on original code by
- * Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu>
- * Armin Custer <akuster@mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
-*/
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/stddef.h>
-
-#include <asm/processor.h>
-#include <asm/system.h>
-#include <asm/irq.h>
-#include <asm/ppc4xx_pic.h>
-#include <asm/machdep.h>
-
-/* See comment in include/arch-ppc/ppc4xx_pic.h
- * for more info about these two variables
- */
-extern struct ppc4xx_uic_settings ppc4xx_core_uic_cfg[NR_UICS]
- __attribute__ ((weak));
-extern unsigned char ppc4xx_uic_ext_irq_cfg[] __attribute__ ((weak));
-
-#define IRQ_MASK_UIC0(irq) (1 << (31 - (irq)))
-#define IRQ_MASK_UICx(irq) (1 << (31 - ((irq) & 0x1f)))
-#define IRQ_MASK_UIC1(irq) IRQ_MASK_UICx(irq)
-#define IRQ_MASK_UIC2(irq) IRQ_MASK_UICx(irq)
-#define IRQ_MASK_UIC3(irq) IRQ_MASK_UICx(irq)
-
-#define UIC_HANDLERS(n) \
-static void ppc4xx_uic##n##_enable(unsigned int irq) \
-{ \
- u32 mask = IRQ_MASK_UIC##n(irq); \
- if (irq_desc[irq].status & IRQ_LEVEL) \
- mtdcr(DCRN_UIC_SR(UIC##n), mask); \
- ppc_cached_irq_mask[n] |= mask; \
- mtdcr(DCRN_UIC_ER(UIC##n), ppc_cached_irq_mask[n]); \
-} \
- \
-static void ppc4xx_uic##n##_disable(unsigned int irq) \
-{ \
- ppc_cached_irq_mask[n] &= ~IRQ_MASK_UIC##n(irq); \
- mtdcr(DCRN_UIC_ER(UIC##n), ppc_cached_irq_mask[n]); \
- ACK_UIC##n##_PARENT \
-} \
- \
-static void ppc4xx_uic##n##_ack(unsigned int irq) \
-{ \
- u32 mask = IRQ_MASK_UIC##n(irq); \
- ppc_cached_irq_mask[n] &= ~mask; \
- mtdcr(DCRN_UIC_ER(UIC##n), ppc_cached_irq_mask[n]); \
- mtdcr(DCRN_UIC_SR(UIC##n), mask); \
- ACK_UIC##n##_PARENT \
-} \
- \
-static void ppc4xx_uic##n##_end(unsigned int irq) \
-{ \
- unsigned int status = irq_desc[irq].status; \
- u32 mask = IRQ_MASK_UIC##n(irq); \
- if (status & IRQ_LEVEL) { \
- mtdcr(DCRN_UIC_SR(UIC##n), mask); \
- ACK_UIC##n##_PARENT \
- } \
- if (!(status & (IRQ_DISABLED | IRQ_INPROGRESS))) { \
- ppc_cached_irq_mask[n] |= mask; \
- mtdcr(DCRN_UIC_ER(UIC##n), ppc_cached_irq_mask[n]); \
- } \
-}
-
-#define DECLARE_UIC(n) \
-{ \
- .typename = "UIC"#n, \
- .enable = ppc4xx_uic##n##_enable, \
- .disable = ppc4xx_uic##n##_disable, \
- .ack = ppc4xx_uic##n##_ack, \
- .end = ppc4xx_uic##n##_end, \
-} \
-
-#if NR_UICS == 4
-#define ACK_UIC0_PARENT
-#define ACK_UIC1_PARENT mtdcr(DCRN_UIC_SR(UIC0), UIC0_UIC1NC);
-#define ACK_UIC2_PARENT mtdcr(DCRN_UIC_SR(UIC0), UIC0_UIC2NC);
-#define ACK_UIC3_PARENT mtdcr(DCRN_UIC_SR(UIC0), UIC0_UIC3NC);
-UIC_HANDLERS(0);
-UIC_HANDLERS(1);
-UIC_HANDLERS(2);
-UIC_HANDLERS(3);
-
-static int ppc4xx_pic_get_irq(void)
-{
- u32 uic0 = mfdcr(DCRN_UIC_MSR(UIC0));
- if (uic0 & UIC0_UIC1NC)
- return 64 - ffs(mfdcr(DCRN_UIC_MSR(UIC1)));
- else if (uic0 & UIC0_UIC2NC)
- return 96 - ffs(mfdcr(DCRN_UIC_MSR(UIC2)));
- else if (uic0 & UIC0_UIC3NC)
- return 128 - ffs(mfdcr(DCRN_UIC_MSR(UIC3)));
- else
- return uic0 ? 32 - ffs(uic0) : -1;
-}
-
-static void __init ppc4xx_pic_impl_init(void)
-{
- /* Enable cascade interrupts in UIC0 */
- ppc_cached_irq_mask[0] |= UIC0_UIC1NC | UIC0_UIC2NC | UIC0_UIC3NC;
- mtdcr(DCRN_UIC_SR(UIC0), UIC0_UIC1NC | UIC0_UIC2NC | UIC0_UIC3NC);
- mtdcr(DCRN_UIC_ER(UIC0), ppc_cached_irq_mask[0]);
-}
-
-#elif NR_UICS == 3
-#define ACK_UIC0_PARENT mtdcr(DCRN_UIC_SR(UICB), UICB_UIC0NC);
-#define ACK_UIC1_PARENT mtdcr(DCRN_UIC_SR(UICB), UICB_UIC1NC);
-#define ACK_UIC2_PARENT mtdcr(DCRN_UIC_SR(UICB), UICB_UIC2NC);
-UIC_HANDLERS(0);
-UIC_HANDLERS(1);
-UIC_HANDLERS(2);
-
-static int ppc4xx_pic_get_irq(void)
-{
- u32 uicb = mfdcr(DCRN_UIC_MSR(UICB));
- if (uicb & UICB_UIC0NC)
- return 32 - ffs(mfdcr(DCRN_UIC_MSR(UIC0)));
- else if (uicb & UICB_UIC1NC)
- return 64 - ffs(mfdcr(DCRN_UIC_MSR(UIC1)));
- else if (uicb & UICB_UIC2NC)
- return 96 - ffs(mfdcr(DCRN_UIC_MSR(UIC2)));
- else
- return -1;
-}
-
-static void __init ppc4xx_pic_impl_init(void)
-{
-#if defined(CONFIG_440GX)
- /* Disable 440GP compatibility mode if it was enabled in firmware */
- SDR_WRITE(DCRN_SDR_MFR, SDR_READ(DCRN_SDR_MFR) & ~DCRN_SDR_MFR_PCM);
-#endif
- /* Configure Base UIC */
- mtdcr(DCRN_UIC_CR(UICB), 0);
- mtdcr(DCRN_UIC_TR(UICB), 0);
- mtdcr(DCRN_UIC_PR(UICB), 0xffffffff);
- mtdcr(DCRN_UIC_SR(UICB), 0xffffffff);
- mtdcr(DCRN_UIC_ER(UICB), UICB_UIC0NC | UICB_UIC1NC | UICB_UIC2NC);
-}
-
-#elif NR_UICS == 2
-#define ACK_UIC0_PARENT
-#define ACK_UIC1_PARENT mtdcr(DCRN_UIC_SR(UIC0), UIC0_UIC1NC);
-UIC_HANDLERS(0);
-UIC_HANDLERS(1);
-
-static int ppc4xx_pic_get_irq(void)
-{
- u32 uic0 = mfdcr(DCRN_UIC_MSR(UIC0));
- if (uic0 & UIC0_UIC1NC)
- return 64 - ffs(mfdcr(DCRN_UIC_MSR(UIC1)));
- else
- return uic0 ? 32 - ffs(uic0) : -1;
-}
-
-static void __init ppc4xx_pic_impl_init(void)
-{
- /* Enable cascade interrupt in UIC0 */
- ppc_cached_irq_mask[0] |= UIC0_UIC1NC;
- mtdcr(DCRN_UIC_SR(UIC0), UIC0_UIC1NC);
- mtdcr(DCRN_UIC_ER(UIC0), ppc_cached_irq_mask[0]);
-}
-
-#elif NR_UICS == 1
-#define ACK_UIC0_PARENT
-UIC_HANDLERS(0);
-
-static int ppc4xx_pic_get_irq(void)
-{
- u32 uic0 = mfdcr(DCRN_UIC_MSR(UIC0));
- return uic0 ? 32 - ffs(uic0) : -1;
-}
-
-static inline void ppc4xx_pic_impl_init(void)
-{
-}
-#endif
-
-static struct ppc4xx_uic_impl {
- struct hw_interrupt_type decl;
- int base; /* Base DCR number */
-} __uic[] = {
- { .decl = DECLARE_UIC(0), .base = UIC0 },
-#if NR_UICS > 1
- { .decl = DECLARE_UIC(1), .base = UIC1 },
-#if NR_UICS > 2
- { .decl = DECLARE_UIC(2), .base = UIC2 },
-#if NR_UICS > 3
- { .decl = DECLARE_UIC(3), .base = UIC3 },
-#endif
-#endif
-#endif
-};
-
-static inline int is_level_sensitive(int irq)
-{
- u32 tr = mfdcr(DCRN_UIC_TR(__uic[irq >> 5].base));
- return (tr & IRQ_MASK_UICx(irq)) == 0;
-}
-
-void __init ppc4xx_pic_init(void)
-{
- int i;
- unsigned char *eirqs = ppc4xx_uic_ext_irq_cfg;
-
- for (i = 0; i < NR_UICS; ++i) {
- int base = __uic[i].base;
-
- /* Disable everything by default */
- ppc_cached_irq_mask[i] = 0;
- mtdcr(DCRN_UIC_ER(base), 0);
-
- /* We don't use critical interrupts */
- mtdcr(DCRN_UIC_CR(base), 0);
-
- /* Configure polarity and triggering */
- if (ppc4xx_core_uic_cfg) {
- struct ppc4xx_uic_settings *p = ppc4xx_core_uic_cfg + i;
- u32 mask = p->ext_irq_mask;
- u32 pr = mfdcr(DCRN_UIC_PR(base)) & mask;
- u32 tr = mfdcr(DCRN_UIC_TR(base)) & mask;
-
- /* "Fixed" interrupts (on-chip devices) */
- pr |= p->polarity & ~mask;
- tr |= p->triggering & ~mask;
-
- /* Merge external IRQs settings if board port
- * provided them
- */
- if (eirqs && mask) {
- pr &= ~mask;
- tr &= ~mask;
- while (mask) {
- /* Extract current external IRQ mask */
- u32 eirq_mask = 1 << __ilog2(mask);
-
- if (!(*eirqs & IRQ_SENSE_LEVEL))
- tr |= eirq_mask;
-
- if (*eirqs & IRQ_POLARITY_POSITIVE)
- pr |= eirq_mask;
-
- mask &= ~eirq_mask;
- ++eirqs;
- }
- }
- mtdcr(DCRN_UIC_PR(base), pr);
- mtdcr(DCRN_UIC_TR(base), tr);
- }
-
- /* ACK any pending interrupts to prevent false
- * triggering after first enable
- */
- mtdcr(DCRN_UIC_SR(base), 0xffffffff);
- }
-
- /* Perform optional implementation specific setup
- * (e.g. enable cascade interrupts for multi-UIC configurations)
- */
- ppc4xx_pic_impl_init();
-
- /* Attach low-level handlers */
- for (i = 0; i < (NR_UICS << 5); ++i) {
- irq_desc[i].chip = &__uic[i >> 5].decl;
- if (is_level_sensitive(i))
- irq_desc[i].status |= IRQ_LEVEL;
- }
-
- ppc_md.get_irq = ppc4xx_pic_get_irq;
-}
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