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