diff options
Diffstat (limited to 'arch/ppc/platforms/adir_pic.c')
-rw-r--r-- | arch/ppc/platforms/adir_pic.c | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/arch/ppc/platforms/adir_pic.c b/arch/ppc/platforms/adir_pic.c deleted file mode 100644 index 9947cba52af..00000000000 --- a/arch/ppc/platforms/adir_pic.c +++ /dev/null @@ -1,130 +0,0 @@ -/* - * arch/ppc/platforms/adir_pic.c - * - * Interrupt controller support for SBS Adirondack - * - * By Michael Sokolov <msokolov@ivan.Harhan.ORG> - * based on the K2 and SCM versions by Matt Porter <mporter@mvista.com> - */ - -#include <linux/stddef.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/pci.h> -#include <linux/interrupt.h> - -#include <asm/io.h> -#include <asm/i8259.h> -#include "adir.h" - -static void adir_onboard_pic_enable(unsigned int irq); -static void adir_onboard_pic_disable(unsigned int irq); - -__init static void -adir_onboard_pic_init(void) -{ - volatile u_short *maskreg = (volatile u_short *) ADIR_PROCA_INT_MASK; - - /* Disable all Adirondack onboard interrupts */ - out_be16(maskreg, 0xFFFF); -} - -static int -adir_onboard_pic_get_irq(void) -{ - volatile u_short *statreg = (volatile u_short *) ADIR_PROCA_INT_STAT; - int irq; - u_short int_status, int_test; - - int_status = in_be16(statreg); - for (irq = 0, int_test = 1; irq < 16; irq++, int_test <<= 1) { - if (int_status & int_test) - break; - } - - if (irq == 16) - return -1; - - return (irq+16); -} - -static void -adir_onboard_pic_enable(unsigned int irq) -{ - volatile u_short *maskreg = (volatile u_short *) ADIR_PROCA_INT_MASK; - - /* Change irq to Adirondack onboard native value */ - irq -= 16; - - /* Enable requested irq number */ - out_be16(maskreg, in_be16(maskreg) & ~(1 << irq)); -} - -static void -adir_onboard_pic_disable(unsigned int irq) -{ - volatile u_short *maskreg = (volatile u_short *) ADIR_PROCA_INT_MASK; - - /* Change irq to Adirondack onboard native value */ - irq -= 16; - - /* Disable requested irq number */ - out_be16(maskreg, in_be16(maskreg) | (1 << irq)); -} - -static struct hw_interrupt_type adir_onboard_pic = { - " ADIR PIC ", - NULL, - NULL, - adir_onboard_pic_enable, /* unmask */ - adir_onboard_pic_disable, /* mask */ - adir_onboard_pic_disable, /* mask and ack */ - NULL, - NULL -}; - -static struct irqaction noop_action = { - .handler = no_action, - .flags = SA_INTERRUPT, - .mask = CPU_MASK_NONE, - .name = "82c59 primary cascade", -}; - -/* - * Linux interrupt values are assigned as follows: - * - * 0-15 VT82C686 8259 interrupts - * 16-31 Adirondack CPLD interrupts - */ -__init void -adir_init_IRQ(void) -{ - int i; - - /* Initialize the cascaded 8259's on the VT82C686 */ - for (i=0; i<16; i++) - irq_desc[i].handler = &i8259_pic; - i8259_init(NULL); - - /* Initialize Adirondack CPLD PIC and enable 8259 interrupt cascade */ - for (i=16; i<32; i++) - irq_desc[i].handler = &adir_onboard_pic; - adir_onboard_pic_init(); - - /* Enable 8259 interrupt cascade */ - setup_irq(ADIR_IRQ_VT82C686_INTR, &noop_action); -} - -int -adir_get_irq(struct pt_regs *regs) -{ - int irq; - - if ((irq = adir_onboard_pic_get_irq()) < 0) - return irq; - - if (irq == ADIR_IRQ_VT82C686_INTR) - irq = i8259_irq(regs); - - return irq; -} |