config PPC_PSERIES
depends on PPC_MULTIPLATFORM && PPC64
bool " IBM pSeries & new (POWER5-based) iSeries"
+ select PPC_I8259
default y
config PPC_CHRP
bool " Common Hardware Reference Platform (CHRP) based machines"
depends on PPC_MULTIPLATFORM && PPC32
+ select PPC_I8259
select PPC_INDIRECT_PCI
default y
config PPC_PREP
bool " PowerPC Reference Platform (PReP) based machines"
depends on PPC_MULTIPLATFORM && PPC32
+ select PPC_I8259
select PPC_INDIRECT_PCI
default y
config ISA
bool "Support for ISA-bus hardware"
depends on PPC_PREP || PPC_CHRP
+ select PPC_I8259
help
Find out whether you have ISA slots on your motherboard. ISA is the
name of a bus system, i.e. the way the CPU talks to the other stuff
depends on PPC64 || POWER4 || 6xx && !CPM2
default y
+config PPC_I8259
+ bool
+ default y if 85xx
+ default n
+
config PPC_INDIRECT_PCI
bool
depends on PCI
config PCI_QSPAN
bool "QSpan PCI"
depends on !4xx && !CPM2 && 8xx
+ select PPC_I8259
help
Say Y here if you have a system based on a Motorola 8xx-series
embedded processor with a QSPAN PCI interface, otherwise say N.
config LOPEC
bool "Motorola-LoPEC"
+ select PPC_I8259
config MVME5100
bool "Motorola-MVME5100"
config PPLUS
bool "Motorola-PowerPlus"
+ select PPC_I8259
select PPC_INDIRECT_PCI
config PRPMC750
config SANDPOINT
bool "Motorola-Sandpoint"
+ select PPC_I8259
help
Select SANDPOINT if configuring for a Motorola Sandpoint X3
(any flavor).
config RADSTONE_PPC7D
bool "Radstone Technology PPC7D board"
+ select PPC_I8259
config PAL4
bool "SBS-Palomar4"
config MVME5100_IPMC761_PRESENT
bool "MVME5100 configured with an IPMC761"
depends on MVME5100
+ select PPC_I8259
config SPRUCE_BAUD_33M
bool "Spruce baud clock support"
static void pseries_shared_idle(void);
static void pseries_dedicated_idle(void);
-static volatile void __iomem * chrp_int_ack_special;
struct mpic *pSeries_mpic;
void pSeries_show_cpuinfo(struct seq_file *m)
fwnmi_active = 1;
}
-static int pSeries_irq_cascade(struct pt_regs *regs, void *data)
-{
- if (chrp_int_ack_special)
- return readb(chrp_int_ack_special);
- else
- return i8259_irq(regs);
-}
-
static void __init pSeries_init_mpic(void)
{
unsigned int *addrp;
struct device_node *np;
- int i;
+ unsigned long intack = 0;
/* All ISUs are setup, complete initialization */
mpic_init(pSeries_mpic);
get_property(np, "8259-interrupt-acknowledge", NULL)))
printk(KERN_ERR "Cannot find pci to get ack address\n");
else
- chrp_int_ack_special = ioremap(addrp[prom_n_addr_cells(np)-1], 1);
+ intack = addrp[prom_n_addr_cells(np)-1];
of_node_put(np);
/* Setup the legacy interrupts & controller */
- for (i = 0; i < NUM_ISA_INTERRUPTS; i++)
- irq_desc[i].handler = &i8259_pic;
- i8259_init(0);
+ i8259_init(intack, 0);
/* Hook cascade to mpic */
- mpic_setup_cascade(NUM_ISA_INTERRUPTS, pSeries_irq_cascade, NULL);
+ mpic_setup_cascade(NUM_ISA_INTERRUPTS, i8259_irq_cascade, NULL);
}
static void __init pSeries_setup_mpic(void)
obj-$(CONFIG_MPIC) += mpic.o
obj-$(CONFIG_PPC_INDIRECT_PCI) += indirect_pci.o
+obj-$(CONFIG_PPC_I8259) += i8259.o
--- /dev/null
+/*
+ * i8259 interrupt controller driver.
+ *
+ * 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/ioport.h>
+#include <linux/interrupt.h>
+#include <asm/io.h>
+#include <asm/i8259.h>
+
+static volatile void __iomem *pci_intack; /* RO, gives us the irq vector */
+
+static unsigned char cached_8259[2] = { 0xff, 0xff };
+#define cached_A1 (cached_8259[0])
+#define cached_21 (cached_8259[1])
+
+static DEFINE_SPINLOCK(i8259_lock);
+
+static int i8259_pic_irq_offset;
+
+/*
+ * Acknowledge the IRQ using either the PCI host bridge's interrupt
+ * acknowledge feature or poll. How i8259_init() is called determines
+ * which is called. It should be noted that polling is broken on some
+ * IBM and Motorola PReP boxes so we must use the int-ack feature on them.
+ */
+int i8259_irq(struct pt_regs *regs)
+{
+ int irq;
+
+ spin_lock(&i8259_lock);
+
+ /* Either int-ack or poll for the IRQ */
+ if (pci_intack)
+ irq = readb(pci_intack);
+ else {
+ /* Perform an interrupt acknowledge cycle on controller 1. */
+ outb(0x0C, 0x20); /* prepare for poll */
+ irq = inb(0x20) & 7;
+ if (irq == 2 ) {
+ /*
+ * Interrupt is cascaded so perform interrupt
+ * acknowledge on controller 2.
+ */
+ outb(0x0C, 0xA0); /* prepare for poll */
+ irq = (inb(0xA0) & 7) + 8;
+ }
+ }
+
+ if (irq == 7) {
+ /*
+ * This may be a spurious interrupt.
+ *
+ * Read the interrupt status register (ISR). If the most
+ * significant bit is not set then there is no valid
+ * interrupt.
+ */
+ if (!pci_intack)
+ outb(0x0B, 0x20); /* ISR register */
+ if(~inb(0x20) & 0x80)
+ irq = -1;
+ }
+
+ spin_unlock(&i8259_lock);
+ return irq + i8259_pic_irq_offset;
+}
+
+int i8259_irq_cascade(struct pt_regs *regs, void *unused)
+{
+ return i8259_irq(regs);
+}
+
+static void i8259_mask_and_ack_irq(unsigned int irq_nr)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&i8259_lock, flags);
+ irq_nr -= i8259_pic_irq_offset;
+ if (irq_nr > 7) {
+ cached_A1 |= 1 << (irq_nr-8);
+ inb(0xA1); /* DUMMY */
+ outb(cached_A1, 0xA1);
+ outb(0x20, 0xA0); /* Non-specific EOI */
+ outb(0x20, 0x20); /* Non-specific EOI to cascade */
+ } else {
+ cached_21 |= 1 << irq_nr;
+ inb(0x21); /* DUMMY */
+ outb(cached_21, 0x21);
+ outb(0x20, 0x20); /* Non-specific EOI */
+ }
+ spin_unlock_irqrestore(&i8259_lock, flags);
+}
+
+static void i8259_set_irq_mask(int irq_nr)
+{
+ outb(cached_A1,0xA1);
+ outb(cached_21,0x21);
+}
+
+static void i8259_mask_irq(unsigned int irq_nr)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&i8259_lock, flags);
+ irq_nr -= i8259_pic_irq_offset;
+ if (irq_nr < 8)
+ cached_21 |= 1 << irq_nr;
+ else
+ cached_A1 |= 1 << (irq_nr-8);
+ i8259_set_irq_mask(irq_nr);
+ spin_unlock_irqrestore(&i8259_lock, flags);
+}
+
+static void i8259_unmask_irq(unsigned int irq_nr)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&i8259_lock, flags);
+ irq_nr -= i8259_pic_irq_offset;
+ if (irq_nr < 8)
+ cached_21 &= ~(1 << irq_nr);
+ else
+ cached_A1 &= ~(1 << (irq_nr-8));
+ i8259_set_irq_mask(irq_nr);
+ spin_unlock_irqrestore(&i8259_lock, flags);
+}
+
+static void i8259_end_irq(unsigned int irq)
+{
+ if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))
+ && irq_desc[irq].action)
+ i8259_unmask_irq(irq);
+}
+
+struct hw_interrupt_type i8259_pic = {
+ .typename = " i8259 ",
+ .enable = i8259_unmask_irq,
+ .disable = i8259_mask_irq,
+ .ack = i8259_mask_and_ack_irq,
+ .end = i8259_end_irq,
+};
+
+static struct resource pic1_iores = {
+ .name = "8259 (master)",
+ .start = 0x20,
+ .end = 0x21,
+ .flags = IORESOURCE_BUSY,
+};
+
+static struct resource pic2_iores = {
+ .name = "8259 (slave)",
+ .start = 0xa0,
+ .end = 0xa1,
+ .flags = IORESOURCE_BUSY,
+};
+
+static struct resource pic_edgectrl_iores = {
+ .name = "8259 edge control",
+ .start = 0x4d0,
+ .end = 0x4d1,
+ .flags = IORESOURCE_BUSY,
+};
+
+static struct irqaction i8259_irqaction = {
+ .handler = no_action,
+ .flags = SA_INTERRUPT,
+ .mask = CPU_MASK_NONE,
+ .name = "82c59 secondary cascade",
+};
+
+/*
+ * i8259_init()
+ * intack_addr - PCI interrupt acknowledge (real) address which will return
+ * the active irq from the 8259
+ */
+void __init i8259_init(unsigned long intack_addr, int offset)
+{
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&i8259_lock, flags);
+ i8259_pic_irq_offset = offset;
+
+ /* init master interrupt controller */
+ outb(0x11, 0x20); /* Start init sequence */
+ outb(0x00, 0x21); /* Vector base */
+ outb(0x04, 0x21); /* edge tiggered, Cascade (slave) on IRQ2 */
+ outb(0x01, 0x21); /* Select 8086 mode */
+
+ /* init slave interrupt controller */
+ outb(0x11, 0xA0); /* Start init sequence */
+ outb(0x08, 0xA1); /* Vector base */
+ outb(0x02, 0xA1); /* edge triggered, Cascade (slave) on IRQ2 */
+ outb(0x01, 0xA1); /* Select 8086 mode */
+
+ /* always read ISR */
+ outb(0x0B, 0x20);
+ outb(0x0B, 0xA0);
+
+ /* Mask all interrupts */
+ outb(cached_A1, 0xA1);
+ outb(cached_21, 0x21);
+
+ spin_unlock_irqrestore(&i8259_lock, flags);
+
+ /* reserve our resources */
+ setup_irq(offset + 2, &i8259_irqaction);
+ request_resource(&ioport_resource, &pic1_iores);
+ request_resource(&ioport_resource, &pic2_iores);
+ request_resource(&ioport_resource, &pic_edgectrl_iores);
+
+ if (intack_addr != 0)
+ pci_intack = ioremap(intack_addr, 1);
+
+ for (i = 0; i < NUM_ISA_INTERRUPTS; ++i)
+ irq_desc[offset + i].handler = &i8259_pic;
+}
config LOPEC
bool "Motorola-LoPEC"
+ select PPC_I8259
config MVME5100
bool "Motorola-MVME5100"
config PPLUS
bool "Motorola-PowerPlus"
+ select PPC_I8259
select PPC_INDIRECT_PCI
config PRPMC750
config SANDPOINT
bool "Motorola-Sandpoint"
+ select PPC_I8259
help
Select SANDPOINT if configuring for a Motorola Sandpoint X3
(any flavor).
config RADSTONE_PPC7D
bool "Radstone Technology PPC7D board"
+ select PPC_I8259
config PAL4
bool "SBS-Palomar4"
config PPC_CHRP
bool " Common Hardware Reference Platform (CHRP) based machines"
depends on PPC_MULTIPLATFORM
+ select PPC_I8259
select PPC_INDIRECT_PCI
default y
config PPC_PREP
bool " PowerPC Reference Platform (PReP) based machines"
depends on PPC_MULTIPLATFORM
+ select PPC_I8259
select PPC_INDIRECT_PCI
default y
config MVME5100_IPMC761_PRESENT
bool "MVME5100 configured with an IPMC761"
depends on MVME5100
+ select PPC_I8259
config SPRUCE_BAUD_33M
bool "Spruce baud clock support"
config ISA
bool "Support for ISA-bus hardware"
depends on PPC_PREP || PPC_CHRP
+ select PPC_I8259
help
Find out whether you have ISA slots on your motherboard. ISA is the
name of a bus system, i.e. the way the CPU talks to the other stuff
depends on POWER3 || POWER4 || 6xx && !CPM2
default y
+config PPC_I8259
+ bool
+ default y if 85xx
+ default n
+
config PPC_INDIRECT_PCI
bool
depends on PCI
config PCI_QSPAN
bool "QSpan PCI"
depends on !4xx && !CPM2 && 8xx
+ select PPC_I8259
help
Say Y here if you have a system based on a Motorola 8xx-series
embedded processor with a QSPAN PCI interface, otherwise say N.
#ifdef CONFIG_PCI
openpic_hookup_cascade(PIRQ0A, "82c59 cascade", i8259_irq);
- for (i = 0; i < NUM_8259_INTERRUPTS; i++)
- irq_desc[i].handler = &i8259_pic;
-
- i8259_init(0);
+ i8259_init(0, 0);
#endif
#ifdef CONFIG_CPM2
i8259_irq);
}
- for (i = 0; i < NUM_8259_INTERRUPTS; i++)
- irq_desc[i].handler = &i8259_pic;
- i8259_init(chrp_int_ack);
+ i8259_init(chrp_int_ack, 0);
#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
/* see if there is a keyboard in the device tree
openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
&i8259_irq);
- /* Map i8259 interrupts */
- for(i = 0; i < NUM_8259_INTERRUPTS; i++)
- irq_desc[i].handler = &i8259_pic;
-
/*
* The EPIC allows for a read in the range of 0xFEF00000 ->
* 0xFEFFFFFF to generate a PCI interrupt-acknowledge transaction.
*/
- i8259_init(0xfef00000);
+ i8259_init(0xfef00000, 0);
}
static int __init
openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
&i8259_irq);
- /* Map i8259 interrupts. */
- for (i = 0; i < NUM_8259_INTERRUPTS; i++)
- irq_desc[i].handler = &i8259_pic;
-
- i8259_init(0);
+ i8259_init(0, 0);
#else
openpic_init(0);
#endif
ppc_md.get_irq = openpic_get_irq;
}
- for (i = 0; i < NUM_8259_INTERRUPTS; i++)
- irq_desc[i].handler = &i8259_pic;
-
- i8259_init(0);
+ i8259_init(0, 0);
if (ppc_md.progress)
ppc_md.progress("init_irq: exit", 0);
openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
i8259_irq);
}
- for ( i = 0 ; i < NUM_8259_INTERRUPTS ; i++ )
- irq_desc[i].handler = &i8259_pic;
if (have_residual_data) {
- i8259_init(residual_isapic_addr());
+ i8259_init(residual_isapic_addr(), 0);
return;
}
if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_MOTOROLA)
&& ((pci_did == PCI_DEVICE_ID_MOTOROLA_RAVEN)
|| (pci_did == PCI_DEVICE_ID_MOTOROLA_HAWK)))
- i8259_init(0);
+ i8259_init(0, 0);
else
/* PCI interrupt ack address given in section 6.1.8 of the
* PReP specification. */
- i8259_init(MPC10X_MAPA_PCI_INTACK_ADDR);
+ i8259_init(MPC10X_MAPA_PCI_INTACK_ADDR, 0);
}
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
int irq;
pr_debug("%s\n", __FUNCTION__);
- i8259_init(0);
+ i8259_init(0, 0);
mv64360_init_irq();
- /* IRQ 0..15 are handled by the cascaded 8259's of the Ali1535 */
- for (irq = 0; irq < 16; irq++) {
- irq_desc[irq].handler = &i8259_pic;
- }
/* IRQs 5,6,9,10,11,14,15 are level sensitive */
irq_desc[5].status |= IRQ_LEVEL;
irq_desc[6].status |= IRQ_LEVEL;
openpic_hookup_cascade(sandpoint_is_x2 ? 17 : NUM_8259_INTERRUPTS, "82c59 cascade",
i8259_irq);
- /*
- * openpic_init() has set up irq_desc[16-31] to be openpic
- * interrupts. We need to set irq_desc[0-15] to be i8259
- * interrupts.
- */
- for(i=0; i < NUM_8259_INTERRUPTS; i++)
- irq_desc[i].handler = &i8259_pic;
-
/*
* The EPIC allows for a read in the range of 0xFEF00000 ->
* 0xFEFFFFFF to generate a PCI interrupt-acknowledge transaction.
*/
- i8259_init(0xfef00000);
+ i8259_init(0xfef00000, 0);
}
static unsigned long __init
endif
obj-$(CONFIG_8xx) += m8xx_setup.o ppc8xx_pic.o $(wdt-mpc8xx-y) \
ppc_sys.o mpc8xx_devices.o mpc8xx_sys.o
-ifeq ($(CONFIG_8xx),y)
-obj-$(CONFIG_PCI) += qspan_pci.o i8259.o
-endif
+obj-$(CONFIG_PCI_QSPAN) += qspan_pci.o
obj-$(CONFIG_PPC_OF) += prom_init.o prom.o
obj-$(CONFIG_PPC_PMAC) += open_pic.o
obj-$(CONFIG_POWER4) += open_pic2.o
-obj-$(CONFIG_PPC_CHRP) += open_pic.o i8259.o
-obj-$(CONFIG_PPC_PREP) += open_pic.o i8259.o todc_time.o
+obj-$(CONFIG_PPC_CHRP) += open_pic.o
+obj-$(CONFIG_PPC_PREP) += open_pic.o todc_time.o
obj-$(CONFIG_BAMBOO) += pci_auto.o todc_time.o
obj-$(CONFIG_CPCI690) += todc_time.o pci_auto.o
obj-$(CONFIG_EBONY) += pci_auto.o todc_time.o
obj-$(CONFIG_CHESTNUT) += mv64360_pic.o pci_auto.o
obj-$(CONFIG_GEMINI) += open_pic.o
obj-$(CONFIG_GT64260) += gt64260_pic.o
-obj-$(CONFIG_LOPEC) += i8259.o pci_auto.o todc_time.o
+obj-$(CONFIG_LOPEC) += pci_auto.o todc_time.o
obj-$(CONFIG_HDPU) += pci_auto.o
obj-$(CONFIG_LUAN) += pci_auto.o todc_time.o
obj-$(CONFIG_KATANA) += pci_auto.o
obj-$(CONFIG_MV64X60) += mv64x60.o mv64x60_win.o
obj-$(CONFIG_MVME5100) += open_pic.o todc_time.o \
pci_auto.o hawk_common.o
-obj-$(CONFIG_MVME5100_IPMC761_PRESENT) += i8259.o
obj-$(CONFIG_OCOTEA) += pci_auto.o todc_time.o
obj-$(CONFIG_PAL4) += cpc700_pic.o
obj-$(CONFIG_POWERPMC250) += pci_auto.o
-obj-$(CONFIG_PPLUS) += hawk_common.o open_pic.o i8259.o \
+obj-$(CONFIG_PPLUS) += hawk_common.o open_pic.o \
todc_time.o pci_auto.o
obj-$(CONFIG_PRPMC750) += open_pic.o pci_auto.o \
hawk_common.o
obj-$(CONFIG_HARRIER) += harrier.o
obj-$(CONFIG_PRPMC800) += open_pic.o pci_auto.o
-obj-$(CONFIG_RADSTONE_PPC7D) += i8259.o pci_auto.o
-obj-$(CONFIG_SANDPOINT) += i8259.o pci_auto.o todc_time.o
+obj-$(CONFIG_RADSTONE_PPC7D) += pci_auto.o
+obj-$(CONFIG_SANDPOINT) += pci_auto.o todc_time.o
obj-$(CONFIG_SBC82xx) += todc_time.o
obj-$(CONFIG_SPRUCE) += cpc700_pic.o pci_auto.o \
todc_time.o
obj-$(CONFIG_40x) += dcr.o
obj-$(CONFIG_BOOKE) += dcr.o
obj-$(CONFIG_85xx) += open_pic.o ppc85xx_common.o ppc85xx_setup.o \
- ppc_sys.o i8259.o mpc85xx_sys.o \
+ ppc_sys.o mpc85xx_sys.o \
mpc85xx_devices.o
ifeq ($(CONFIG_85xx),y)
obj-$(CONFIG_PCI) += pci_auto.o
+++ /dev/null
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <asm/io.h>
-#include <asm/i8259.h>
-
-static volatile unsigned char *pci_intack; /* RO, gives us the irq vector */
-
-unsigned char cached_8259[2] = { 0xff, 0xff };
-#define cached_A1 (cached_8259[0])
-#define cached_21 (cached_8259[1])
-
-static DEFINE_SPINLOCK(i8259_lock);
-
-int i8259_pic_irq_offset;
-
-/*
- * Acknowledge the IRQ using either the PCI host bridge's interrupt
- * acknowledge feature or poll. How i8259_init() is called determines
- * which is called. It should be noted that polling is broken on some
- * IBM and Motorola PReP boxes so we must use the int-ack feature on them.
- */
-int
-i8259_irq(struct pt_regs *regs)
-{
- int irq;
-
- spin_lock(&i8259_lock);
-
- /* Either int-ack or poll for the IRQ */
- if (pci_intack)
- irq = *pci_intack;
- else {
- /* Perform an interrupt acknowledge cycle on controller 1. */
- outb(0x0C, 0x20); /* prepare for poll */
- irq = inb(0x20) & 7;
- if (irq == 2 ) {
- /*
- * Interrupt is cascaded so perform interrupt
- * acknowledge on controller 2.
- */
- outb(0x0C, 0xA0); /* prepare for poll */
- irq = (inb(0xA0) & 7) + 8;
- }
- }
-
- if (irq == 7) {
- /*
- * This may be a spurious interrupt.
- *
- * Read the interrupt status register (ISR). If the most
- * significant bit is not set then there is no valid
- * interrupt.
- */
- if (!pci_intack)
- outb(0x0B, 0x20); /* ISR register */
- if(~inb(0x20) & 0x80)
- irq = -1;
- }
-
- spin_unlock(&i8259_lock);
- return irq;
-}
-
-static void i8259_mask_and_ack_irq(unsigned int irq_nr)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&i8259_lock, flags);
- if ( irq_nr >= i8259_pic_irq_offset )
- irq_nr -= i8259_pic_irq_offset;
-
- if (irq_nr > 7) {
- cached_A1 |= 1 << (irq_nr-8);
- inb(0xA1); /* DUMMY */
- outb(cached_A1,0xA1);
- outb(0x20,0xA0); /* Non-specific EOI */
- outb(0x20,0x20); /* Non-specific EOI to cascade */
- } else {
- cached_21 |= 1 << irq_nr;
- inb(0x21); /* DUMMY */
- outb(cached_21,0x21);
- outb(0x20,0x20); /* Non-specific EOI */
- }
- spin_unlock_irqrestore(&i8259_lock, flags);
-}
-
-static void i8259_set_irq_mask(int irq_nr)
-{
- outb(cached_A1,0xA1);
- outb(cached_21,0x21);
-}
-
-static void i8259_mask_irq(unsigned int irq_nr)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&i8259_lock, flags);
- if ( irq_nr >= i8259_pic_irq_offset )
- irq_nr -= i8259_pic_irq_offset;
- if ( irq_nr < 8 )
- cached_21 |= 1 << irq_nr;
- else
- cached_A1 |= 1 << (irq_nr-8);
- i8259_set_irq_mask(irq_nr);
- spin_unlock_irqrestore(&i8259_lock, flags);
-}
-
-static void i8259_unmask_irq(unsigned int irq_nr)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&i8259_lock, flags);
- if ( irq_nr >= i8259_pic_irq_offset )
- irq_nr -= i8259_pic_irq_offset;
- if ( irq_nr < 8 )
- cached_21 &= ~(1 << irq_nr);
- else
- cached_A1 &= ~(1 << (irq_nr-8));
- i8259_set_irq_mask(irq_nr);
- spin_unlock_irqrestore(&i8259_lock, flags);
-}
-
-static void i8259_end_irq(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))
- && irq_desc[irq].action)
- i8259_unmask_irq(irq);
-}
-
-struct hw_interrupt_type i8259_pic = {
- .typename = " i8259 ",
- .enable = i8259_unmask_irq,
- .disable = i8259_mask_irq,
- .ack = i8259_mask_and_ack_irq,
- .end = i8259_end_irq,
-};
-
-static struct resource pic1_iores = {
- .name = "8259 (master)",
- .start = 0x20,
- .end = 0x21,
- .flags = IORESOURCE_BUSY,
-};
-
-static struct resource pic2_iores = {
- .name = "8259 (slave)",
- .start = 0xa0,
- .end = 0xa1,
- .flags = IORESOURCE_BUSY,
-};
-
-static struct resource pic_edgectrl_iores = {
- .name = "8259 edge control",
- .start = 0x4d0,
- .end = 0x4d1,
- .flags = IORESOURCE_BUSY,
-};
-
-static struct irqaction i8259_irqaction = {
- .handler = no_action,
- .flags = SA_INTERRUPT,
- .mask = CPU_MASK_NONE,
- .name = "82c59 secondary cascade",
-};
-
-/*
- * i8259_init()
- * intack_addr - PCI interrupt acknowledge (real) address which will return
- * the active irq from the 8259
- */
-void __init
-i8259_init(long intack_addr)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&i8259_lock, flags);
- /* init master interrupt controller */
- outb(0x11, 0x20); /* Start init sequence */
- outb(0x00, 0x21); /* Vector base */
- outb(0x04, 0x21); /* edge tiggered, Cascade (slave) on IRQ2 */
- outb(0x01, 0x21); /* Select 8086 mode */
-
- /* init slave interrupt controller */
- outb(0x11, 0xA0); /* Start init sequence */
- outb(0x08, 0xA1); /* Vector base */
- outb(0x02, 0xA1); /* edge triggered, Cascade (slave) on IRQ2 */
- outb(0x01, 0xA1); /* Select 8086 mode */
-
- /* always read ISR */
- outb(0x0B, 0x20);
- outb(0x0B, 0xA0);
-
- /* Mask all interrupts */
- outb(cached_A1, 0xA1);
- outb(cached_21, 0x21);
-
- spin_unlock_irqrestore(&i8259_lock, flags);
-
- /* reserve our resources */
- setup_irq( i8259_pic_irq_offset + 2, &i8259_irqaction);
- request_resource(&ioport_resource, &pic1_iores);
- request_resource(&ioport_resource, &pic2_iores);
- request_resource(&ioport_resource, &pic_edgectrl_iores);
-
- if (intack_addr != 0)
- pci_intack = ioremap(intack_addr, 1);
-}
bool
default y
+config PPC_I8259
+ depends on PPC_PSERIES
+ bool
+ default y
+
config BPA_IIC
depends on PPC_BPA
bool
obj-$(CONFIG_PCI) += pci.o pci_iommu.o iomap.o $(pci-obj-y)
-obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o
+obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o
ifneq ($(CONFIG_PPC_MERGE),y)
obj-$(CONFIG_PPC_MULTIPLATFORM) += prom_init.o
endif
+++ /dev/null
-/*
- * c 2001 PPC64 Team, IBM Corp
- *
- * 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/stddef.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/cache.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <asm/io.h>
-#include <asm/ppcdebug.h>
-#include "i8259.h"
-
-unsigned char cached_8259[2] = { 0xff, 0xff };
-#define cached_A1 (cached_8259[0])
-#define cached_21 (cached_8259[1])
-
-static __cacheline_aligned_in_smp DEFINE_SPINLOCK(i8259_lock);
-
-static int i8259_pic_irq_offset;
-static int i8259_present;
-
-int i8259_irq(int cpu)
-{
- int irq;
-
- spin_lock/*_irqsave*/(&i8259_lock/*, flags*/);
- /*
- * Perform an interrupt acknowledge cycle on controller 1
- */
- outb(0x0C, 0x20);
- irq = inb(0x20) & 7;
- if (irq == 2)
- {
- /*
- * Interrupt is cascaded so perform interrupt
- * acknowledge on controller 2
- */
- outb(0x0C, 0xA0);
- irq = (inb(0xA0) & 7) + 8;
- }
- else if (irq==7)
- {
- /*
- * This may be a spurious interrupt
- *
- * Read the interrupt status register. If the most
- * significant bit is not set then there is no valid
- * interrupt
- */
- outb(0x0b, 0x20);
- if(~inb(0x20)&0x80) {
- spin_unlock/*_irqrestore*/(&i8259_lock/*, flags*/);
- return -1;
- }
- }
- spin_unlock/*_irqrestore*/(&i8259_lock/*, flags*/);
- return irq;
-}
-
-static void i8259_mask_and_ack_irq(unsigned int irq_nr)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&i8259_lock, flags);
- if ( irq_nr >= i8259_pic_irq_offset )
- irq_nr -= i8259_pic_irq_offset;
-
- if (irq_nr > 7) {
- cached_A1 |= 1 << (irq_nr-8);
- inb(0xA1); /* DUMMY */
- outb(cached_A1,0xA1);
- outb(0x20,0xA0); /* Non-specific EOI */
- outb(0x20,0x20); /* Non-specific EOI to cascade */
- } else {
- cached_21 |= 1 << irq_nr;
- inb(0x21); /* DUMMY */
- outb(cached_21,0x21);
- outb(0x20,0x20); /* Non-specific EOI */
- }
- spin_unlock_irqrestore(&i8259_lock, flags);
-}
-
-static void i8259_set_irq_mask(int irq_nr)
-{
- outb(cached_A1,0xA1);
- outb(cached_21,0x21);
-}
-
-static void i8259_mask_irq(unsigned int irq_nr)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&i8259_lock, flags);
- if ( irq_nr >= i8259_pic_irq_offset )
- irq_nr -= i8259_pic_irq_offset;
- if ( irq_nr < 8 )
- cached_21 |= 1 << irq_nr;
- else
- cached_A1 |= 1 << (irq_nr-8);
- i8259_set_irq_mask(irq_nr);
- spin_unlock_irqrestore(&i8259_lock, flags);
-}
-
-static void i8259_unmask_irq(unsigned int irq_nr)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&i8259_lock, flags);
- if ( irq_nr >= i8259_pic_irq_offset )
- irq_nr -= i8259_pic_irq_offset;
- if ( irq_nr < 8 )
- cached_21 &= ~(1 << irq_nr);
- else
- cached_A1 &= ~(1 << (irq_nr-8));
- i8259_set_irq_mask(irq_nr);
- spin_unlock_irqrestore(&i8259_lock, flags);
-}
-
-static void i8259_end_irq(unsigned int irq)
-{
- if (!(get_irq_desc(irq)->status & (IRQ_DISABLED|IRQ_INPROGRESS)) &&
- get_irq_desc(irq)->action)
- i8259_unmask_irq(irq);
-}
-
-struct hw_interrupt_type i8259_pic = {
- .typename = " i8259 ",
- .enable = i8259_unmask_irq,
- .disable = i8259_mask_irq,
- .ack = i8259_mask_and_ack_irq,
- .end = i8259_end_irq,
-};
-
-void __init i8259_init(int offset)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&i8259_lock, flags);
- i8259_pic_irq_offset = offset;
- i8259_present = 1;
- /* init master interrupt controller */
- outb(0x11, 0x20); /* Start init sequence */
- outb(0x00, 0x21); /* Vector base */
- outb(0x04, 0x21); /* edge tiggered, Cascade (slave) on IRQ2 */
- outb(0x01, 0x21); /* Select 8086 mode */
- outb(0xFF, 0x21); /* Mask all */
- /* init slave interrupt controller */
- outb(0x11, 0xA0); /* Start init sequence */
- outb(0x08, 0xA1); /* Vector base */
- outb(0x02, 0xA1); /* edge triggered, Cascade (slave) on IRQ2 */
- outb(0x01, 0xA1); /* Select 8086 mode */
- outb(0xFF, 0xA1); /* Mask all */
- outb(cached_A1, 0xA1);
- outb(cached_21, 0x21);
- spin_unlock_irqrestore(&i8259_lock, flags);
-
-}
-
-static int i8259_request_cascade(void)
-{
- if (!i8259_present)
- return -ENODEV;
-
- request_irq( i8259_pic_irq_offset + 2, no_action, SA_INTERRUPT,
- "82c59 secondary cascade", NULL );
-
- return 0;
-}
-
-arch_initcall(i8259_request_cascade);
extern struct hw_interrupt_type i8259_pic;
-extern void i8259_init(long intack_addr);
+extern void i8259_init(unsigned long intack_addr, int offset);
extern int i8259_irq(struct pt_regs *regs);
+extern int i8259_irq_cascade(struct pt_regs *regs, void *unused);
#endif /* _ASM_POWERPC_I8259_H */
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff