diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/m68k/amiga/cia.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/m68k/amiga/cia.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/ANDROID_3.4.5/arch/m68k/amiga/cia.c b/ANDROID_3.4.5/arch/m68k/amiga/cia.c deleted file mode 100644 index 18c0e299..00000000 --- a/ANDROID_3.4.5/arch/m68k/amiga/cia.c +++ /dev/null @@ -1,185 +0,0 @@ -/* - * linux/arch/m68k/amiga/cia.c - CIA support - * - * Copyright (C) 1996 Roman Zippel - * - * The concept of some functions bases on the original Amiga OS function - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file COPYING in the main directory of this archive - * for more details. - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/errno.h> -#include <linux/kernel_stat.h> -#include <linux/init.h> -#include <linux/seq_file.h> -#include <linux/interrupt.h> - -#include <asm/irq.h> -#include <asm/amigahw.h> -#include <asm/amigaints.h> - -struct ciabase { - volatile struct CIA *cia; - unsigned char icr_mask, icr_data; - unsigned short int_mask; - int handler_irq, cia_irq, server_irq; - char *name; -} ciaa_base = { - .cia = &ciaa, - .int_mask = IF_PORTS, - .handler_irq = IRQ_AMIGA_PORTS, - .cia_irq = IRQ_AMIGA_CIAA, - .name = "CIAA" -}, ciab_base = { - .cia = &ciab, - .int_mask = IF_EXTER, - .handler_irq = IRQ_AMIGA_EXTER, - .cia_irq = IRQ_AMIGA_CIAB, - .name = "CIAB" -}; - -/* - * Cause or clear CIA interrupts, return old interrupt status. - */ - -unsigned char cia_set_irq(struct ciabase *base, unsigned char mask) -{ - unsigned char old; - - old = (base->icr_data |= base->cia->icr); - if (mask & CIA_ICR_SETCLR) - base->icr_data |= mask; - else - base->icr_data &= ~mask; - if (base->icr_data & base->icr_mask) - amiga_custom.intreq = IF_SETCLR | base->int_mask; - return old & base->icr_mask; -} - -/* - * Enable or disable CIA interrupts, return old interrupt mask, - */ - -unsigned char cia_able_irq(struct ciabase *base, unsigned char mask) -{ - unsigned char old; - - old = base->icr_mask; - base->icr_data |= base->cia->icr; - base->cia->icr = mask; - if (mask & CIA_ICR_SETCLR) - base->icr_mask |= mask; - else - base->icr_mask &= ~mask; - base->icr_mask &= CIA_ICR_ALL; - if (base->icr_data & base->icr_mask) - amiga_custom.intreq = IF_SETCLR | base->int_mask; - return old; -} - -static irqreturn_t cia_handler(int irq, void *dev_id) -{ - struct ciabase *base = dev_id; - int mach_irq; - unsigned char ints; - - mach_irq = base->cia_irq; - ints = cia_set_irq(base, CIA_ICR_ALL); - amiga_custom.intreq = base->int_mask; - for (; ints; mach_irq++, ints >>= 1) { - if (ints & 1) - generic_handle_irq(mach_irq); - } - return IRQ_HANDLED; -} - -static void cia_irq_enable(struct irq_data *data) -{ - unsigned int irq = data->irq; - unsigned char mask; - - if (irq >= IRQ_AMIGA_CIAB) { - mask = 1 << (irq - IRQ_AMIGA_CIAB); - cia_set_irq(&ciab_base, mask); - cia_able_irq(&ciab_base, CIA_ICR_SETCLR | mask); - } else { - mask = 1 << (irq - IRQ_AMIGA_CIAA); - cia_set_irq(&ciaa_base, mask); - cia_able_irq(&ciaa_base, CIA_ICR_SETCLR | mask); - } -} - -static void cia_irq_disable(struct irq_data *data) -{ - unsigned int irq = data->irq; - - if (irq >= IRQ_AMIGA_CIAB) - cia_able_irq(&ciab_base, 1 << (irq - IRQ_AMIGA_CIAB)); - else - cia_able_irq(&ciaa_base, 1 << (irq - IRQ_AMIGA_CIAA)); -} - -static struct irq_chip cia_irq_chip = { - .name = "cia", - .irq_enable = cia_irq_enable, - .irq_disable = cia_irq_disable, -}; - -/* - * Override auto irq 2 & 6 and use them as general chain - * for external interrupts, we link the CIA interrupt sources - * into this chain. - */ - -static void auto_irq_enable(struct irq_data *data) -{ - switch (data->irq) { - case IRQ_AUTO_2: - amiga_custom.intena = IF_SETCLR | IF_PORTS; - break; - case IRQ_AUTO_6: - amiga_custom.intena = IF_SETCLR | IF_EXTER; - break; - } -} - -static void auto_irq_disable(struct irq_data *data) -{ - switch (data->irq) { - case IRQ_AUTO_2: - amiga_custom.intena = IF_PORTS; - break; - case IRQ_AUTO_6: - amiga_custom.intena = IF_EXTER; - break; - } -} - -static struct irq_chip auto_irq_chip = { - .name = "auto", - .irq_enable = auto_irq_enable, - .irq_disable = auto_irq_disable, -}; - -void __init cia_init_IRQ(struct ciabase *base) -{ - m68k_setup_irq_controller(&cia_irq_chip, handle_simple_irq, - base->cia_irq, CIA_IRQS); - - /* clear any pending interrupt and turn off all interrupts */ - cia_set_irq(base, CIA_ICR_ALL); - cia_able_irq(base, CIA_ICR_ALL); - - /* override auto int and install CIA handler */ - m68k_setup_irq_controller(&auto_irq_chip, handle_simple_irq, - base->handler_irq, 1); - m68k_irq_startup_irq(base->handler_irq); - if (request_irq(base->handler_irq, cia_handler, IRQF_SHARED, - base->name, base)) - pr_err("Couldn't register %s interrupt\n", base->name); -} |