/*
* 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/pci.h>
#include <linux/serial_8250.h>
#include <asm/mc146818-time.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, 4),
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 sni_io_resource = {
.start = 0x00001000UL,
.end = 0x03bfffffUL,
.name = "PCIT IO MEM",
.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 = 0xcfc,
.end = 0xcff,
.name = "PCI config data",
.flags = IORESOURCE_BUSY
}
};
static struct resource sni_mem_resource = {
.start = 0x10000000UL,
.end = 0xffffffffUL,
.name = "PCIT PCI MEM",
.flags = IORESOURCE_MEM
};
/*
* The RM200/RM300 has a few holes in it's PCI/EISA memory address space used
* for other purposes. Be paranoid and allocate all of the before the PCI
* code gets a chance to to map anything else there ...
*
* This leaves the following areas available:
*
* 0x10000000 - 0x1009ffff (640kB) PCI/EISA/ISA Bus Memory
* 0x10100000 - 0x13ffffff ( 15MB) PCI/EISA/ISA Bus Memory
* 0x18000000 - 0x1fbfffff (124MB) PCI/EISA Bus Memory
* 0x1ff08000 - 0x1ffeffff (816kB) PCI/EISA Bus Memory
* 0xa0000000 - 0xffffffff (1.5GB) PCI/EISA Bus Memory
*/
static struct resource pcit_mem_resources[] = {
{
.start = 0x14000000,
.end = 0x17bfffff,
.name = "PCI IO",
.flags = IORESOURCE_BUSY
}, {
.start = 0x17c00000,
.end = 0x17ffffff,
.name = "Cache Replacement Area",
.flags = IORESOURCE_BUSY
}, {
.start = 0x180a0000,
.end = 0x180bffff,
.name = "Video RAM area",
.flags = IORESOURCE_BUSY
}, {
.start = 0x180c0000,
.end = 0x180fffff,
.name = "ISA Reserved",
.flags = IORESOURCE_BUSY
}, {
.start = 0x19000000,
.end = 0x1fbfffff,
.name = "PCI MEM",
.flags = IORESOURCE_BUSY
}, {
.start = 0x1fc00000,
.end = 0x1fc7ffff,
.name = "Boot PROM",
.flags = IORESOURCE_BUSY
}, {
.start = 0x1fc80000,
.end = 0x1fcfffff,
.name = "Diag PROM",
.flags = IORESOURCE_BUSY
}, {
.start = 0x1fd00000,
.end = 0x1fdfffff,
.name = "X-Bus",
.flags = IORESOURCE_BUSY
}, {
.start = 0x1fe00000,
.end = 0x1fefffff,
.name = "BIOS map",
.flags = IORESOURCE_BUSY
}, {
.start = 0x1ff00000,
.end = 0x1ff7ffff,
.name = "NVRAM / EEPROM",
.flags = IORESOURCE_BUSY
}, {
.start = 0x1fff0000,
.end = 0x1fffefff,
.name = "MAUI ASIC",
.flags = IORESOURCE_BUSY
}, {
.start = 0x1ffff000,
.end = 0x1fffffff,
.name = "MP Agent",
.flags = IORESOURCE_BUSY
}, {
.start = 0x20000000,
.end = 0x9fffffff,
.name = "Main Memory",
.flags = IORESOURCE_BUSY
}
};
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(&ioport_resource, pcit_io_resources + i);
/* request mem space for pcimt-specific devices */
for (i = 0; i < ARRAY_SIZE(pcit_mem_resources); i++)
request_resource(&sni_mem_resource, pcit_mem_resources + i);
ioport_resource.end = sni_io_resource.end;
}
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 = 0x10000000UL,
.io_resource = &sni_io_resource,
.io_offset = 0x00000000UL
};
static void enable_pcit_irq(unsigned int irq)
{
u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24);
*(volatile u32 *)SNI_PCIT_INT_REG |= mask;
}
void disable_pcit_irq(unsigned int irq)
{
u32 mask = 1 << (irq - SNI_PCIT_INT_START + 24);
*(volatile u32 *)SNI_PCIT_INT_REG &= ~mask;
}
void end_pcit_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
enable_pcit_irq(irq);
}
static struct irq_chip pcit_irq_type = {
.typename = "PCIT",
.ack = disable_pcit_irq,
.mask = disable_pcit_irq,
.mask_ack = disable_pcit_irq,
.unmask = enable_pcit_irq,
.end = end_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) & 0x7f);
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_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++)
set_irq_chip(i, &pcit_irq_type);
*(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++)
set_irq_chip(i, &pcit_irq_type);
*(volatile u32 *)SNI_PCIT_INT_REG = 0;
sni_hwint = sni_pcit_hwint_cplus;
change_c0_status(ST0_IM, IE_IRQ0);
setup_irq (SNI_PCIT_INT_START + 6, &sni_isa_irq);
}
void sni_pcit_init(void)
{
sni_pcit_resource_init();
rtc_mips_get_time = mc146818_get_cmos_time;
rtc_mips_set_time = mc146818_set_rtc_mmss;
board_time_init = sni_cpu_time_init;
#ifdef CONFIG_PCI
register_pci_controller(&sni_pcit_controller);
#endif
}
static int __init snirm_pcit_setup_devinit(void)
{
switch (sni_brd_type) {
case SNI_BRD_PCI_TOWER:
platform_device_register(&pcit_serial8250_device);
break;
case SNI_BRD_PCI_TOWER_CPLUS:
platform_device_register(&pcit_cplus_serial8250_device);
break;
}
return 0;
}
device_initcall(snirm_pcit_setup_devinit);
