1 files changed, 351 insertions, 0 deletions
diff --git a/arch/mips/sni/pcit.c b/arch/mips/sni/pcit.c
new file mode 100644
index 00000000000..3921096023c
--- /dev/null
+++ b/arch/mips/sni/pcit.c
@@ -0,0 +1,351 @@
+/*
+ * 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 (SNI_MIPS_IRQ_CPU_BASE + 4);
+	else if (pending & C_IRQ3)
+		do_IRQ (SNI_MIPS_IRQ_CPU_BASE + 5);
+	else if (pending & C_IRQ5)
+		do_IRQ (SNI_MIPS_IRQ_CPU_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 (SNI_MIPS_IRQ_CPU_BASE + 4);
+	else if (pending & C_IRQ3)
+		do_IRQ (SNI_MIPS_IRQ_CPU_BASE + 5);
+	else if (pending & C_IRQ5)
+		do_IRQ (SNI_MIPS_IRQ_CPU_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);