- 根目录:
- arch
- mips
- sni
- pcit.c
/*
* PCI Tower specific code
*
* 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.
*
* Copyright (C) 2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/pci.h>
#include <linux/serial_8250.h>
#include <asm/sni.h>
#include <asm/time.h>
#include <asm/irq_cpu.h>
#define PORT(_base,_irq) \
{ \
.iobase = _base, \
.irq = _irq, \
.uartclk = 1843200, \
.iotype = UPIO_PORT, \
.flags = UPF_BOOT_AUTOCONF, \
}
static struct plat_serial8250_port pcit_data[] = {
PORT(0x3f8, 0),
PORT(0x2f8, 3),
{ },
};
static struct platform_device pcit_serial8250_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = pcit_data,
},
};
static struct plat_serial8250_port pcit_cplus_data[] = {
PORT(0x3f8, 0),
PORT(0x2f8, 3),
PORT(0x3e8, 4),
PORT(0x2e8, 3),
{ },
};
static struct platform_device pcit_cplus_serial8250_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = pcit_cplus_data,
},
};
static struct resource pcit_cmos_rsrc[] = {
{
.start = 0x70,
.end = 0x71,
.flags = IORESOURCE_IO
},
{
.start = 8,
.end = 8,
.flags = IORESOURCE_IRQ
}
};
static struct platform_device pcit_cmos_device = {
.name = "rtc_cmos",
.num_resources = ARRAY_SIZE(pcit_cmos_rsrc),
.resource = pcit_cmos_rsrc
};
static struct platform_device pcit_pcspeaker_pdev = {
.name = "pcspkr",
.id = -1,
};
static struct resource sni_io_resource = {
.start = 0x00000000UL,
.end = 0x03bfffffUL,
.name = "PCIT IO",
.flags = IORESOURCE_IO,
};
static struct resource pcit_io_resources[] = {
{
.start = 0x00,
.end = 0x1f,
.name = "dma1",
.flags = IORESOURCE_BUSY
}, {
.start = 0x40,
.end = 0x5f,
.name = "timer",
.flags = IORESOURCE_BUSY
}, {
.start = 0x60,
.end = 0x6f,
.name = "keyboard",
.flags = IORESOURCE_BUSY
}, {
.start = 0x80,
.end = 0x8f,
.name = "dma page reg",
.flags = IORESOURCE_BUSY
}, {
.start = 0xc0,
.end = 0xdf,
.name = "dma2",
.flags = IORESOURCE_BUSY
}, {
.start = 0xcf8,
.end = 0xcfb,
.name = "PCI config addr",
.flags = IORESOURCE_BUSY
}, {
.start = 0xcfc,
.end = 0xcff,
.name = "PCI config data",
.flags = IORESOURCE_BUSY
}
};
static struct resource sni_mem_resource = {
.start = 0x18000000UL,
.end = 0x1fbfffffUL,
.name = "PCIT PCI MEM",
.flags = IORESOURCE_MEM
};
static void __init sni_pcit_resource_init(void)
{
int i;
/* request I/O space for devices used on all i[345]86 PCs */
for (i = 0; i < ARRAY_SIZE(pcit_io_resources); i++)
request_resource(&sni_io_resource, pcit_io_resources + i);
}
extern struct pci_ops sni_pcit_ops;
static struct pci_controller sni_pcit_controller = {
.pci_ops = &sni_pcit_ops,
.mem_resource = &sni_mem_resource,
.mem_offset = 0x00000000UL,
.io_resource = &sni_io_resource,
.io_offset = 0x00000000UL,
.io_map_base = SNI_PORT_BASE
};
static void enable_pcit_irq(struct irq_data *d)
{
u32 mask = 1 << (d->irq - SNI_PCIT_INT_START + 24);
*(volatile u32 *)SNI_PCIT_INT_REG |= mask;
}
void disable_pcit_irq(struct irq_data *d)
{
u32 mask = 1 << (d->irq - SNI_PCIT_INT_START + 24);
*(volatile u32 *)SNI_PCIT_INT_REG &= ~mask;
}
static struct irq_chip pcit_irq_type = {
.name = "PCIT",
.irq_mask = disable_pcit_irq,
.irq_unmask = enable_pcit_irq,
};
static void pcit_hwint1(void)
{
u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG;
int irq;
clear_c0_status(IE_IRQ1);
irq = ffs((pending >> 16) & 0x7f);
if (likely(irq > 0))
do_IRQ(irq + SNI_PCIT_INT_START - 1);
set_c0_status(IE_IRQ1);
}
static void pcit_hwint0(void)
{
u32 pending = *(volatile u32 *)SNI_PCIT_INT_REG;
int irq;
clear_c0_status(IE_IRQ0);
irq = ffs((pending >> 16) & 0x3f);
if (likely(irq > 0))
do_IRQ(irq + SNI_PCIT_INT_START - 1);
set_c0_status(IE_IRQ0);
}
static void sni_pcit_hwint(void)
{
u32 pending = read_c0_cause() & read_c0_status();
if (pending & C_IRQ1)
pcit_hwint1();
else if (pending & C_IRQ2)
do_IRQ(MIPS_CPU_IRQ_BASE + 4);
else if (pending & C_IRQ3)
do_IRQ(MIPS_CPU_IRQ_BASE + 5);
else if (pending & C_IRQ5)
do_IRQ(MIPS_CPU_IRQ_BASE + 7);
}
static void sni_pcit_hwint_cplus(void)
{
u32 pending = read_c0_cause() & read_c0_status();
if (pending & C_IRQ0)
pcit_hwint0();
else if (pending & C_IRQ1)
do_IRQ(MIPS_CPU_IRQ_BASE + 3);
else if (pending & C_IRQ2)
do_IRQ(MIPS_CPU_IRQ_BASE + 4);
else if (pending & C_IRQ3)
do_IRQ(MIPS_CPU_IRQ_BASE + 5);
else if (pending & C_IRQ5)
do_IRQ(MIPS_CPU_IRQ_BASE + 7);
}
void __init sni_pcit_irq_init(void)
{
int i;
mips_cpu_irq_init();
for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++)
irq_set_chip_and_handler(i, &pcit_irq_type, handle_level_irq);
*(volatile u32 *)SNI_PCIT_INT_REG = 0;
sni_hwint = sni_pcit_hwint;
change_c0_status(ST0_IM, IE_IRQ1);
setup_irq(SNI_PCIT_INT_START + 6, &sni_isa_irq);
}
void __init sni_pcit_cplus_irq_init(void)
{
int i;
mips_cpu_irq_init();
for (i = SNI_PCIT_INT_START; i <= SNI_PCIT_INT_END; i++)
irq_set_chip_and_handler(i, &pcit_irq_type, handle_level_irq);
*(volatile u32 *)SNI_PCIT_INT_REG = 0x40000000;
sni_hwint = sni_pcit_hwint_cplus;
change_c0_status(ST0_IM, IE_IRQ0);
setup_irq(MIPS_CPU_IRQ_BASE + 3, &sni_isa_irq);
}
void __init sni_pcit_init(void)
{
ioport_resource.end = sni_io_resource.end;
#ifdef CONFIG_PCI
PCIBIOS_MIN_IO = 0x9000;
register_pci_controller(&sni_pcit_controller);
#endif
sni_pcit_resource_init();
}
static int __init snirm_pcit_setup_devinit(void)
{
switch (sni_brd_type) {
case SNI_BRD_PCI_TOWER:
platform_device_register(&pcit_serial8250_device);
platform_device_register(&pcit_cmos_device);
platform_device_register(&pcit_pcspeaker_pdev);
break;
case SNI_BRD_PCI_TOWER_CPLUS:
platform_device_register(&pcit_cplus_serial8250_device);
platform_device_register(&pcit_cmos_device);
platform_device_register(&pcit_pcspeaker_pdev);
break;
}
return 0;
}
device_initcall(snirm_pcit_setup_devinit);